JP6834479B2 - motor - Google Patents

Description

The present invention relates to a motor.

Conventionally, as a stator of a motor, a stator having a plurality of coils arranged in an annular shape in the circumferential direction is widely known. Such a motor stator is disclosed in, for example, Patent Document 1.

The stator of Patent Document 1 has a stator core composed of a plurality of divided cores arranged in the circumferential direction. Each split core has an arcuate connecting portion and a tooth extending radially inward from the circumferential central portion of the connecting portion. An insulator having an insulating property is attached to each divided core. A plurality of coils are formed by winding a lead wire around each tooth from above the insulator. A leader wire is drawn from each coil on one side in the axial direction.

In the stator of Patent Document 1, the circumferential widths of the gaps between the leader lines adjacent to each other in the circumferential direction are all the same. That is, the gaps between the leader lines are all evenly spaced.

Japanese Unexamined Patent Publication No. 2008-220027 (Figs. 2 and 4, etc.)

In addition to the stator, the motor of Patent Document 1 is provided with a bus bar for short-circuiting the leader wires and supplying an externally supplied current to each coil. Each leader line is connected and fixed to each of a plurality of connecting portions provided on the bus bar. Since the gaps between the connecting portions in the circumferential direction are all evenly spaced, the gaps between the leader lines are also equally spaced as described above.

However, as a specification of the bus bar, when there is a part where the gaps between the connecting portions are not evenly spaced, it is not desirable that all the gaps between the leader lines are evenly spaced.

Further, even when a jig for positioning the leader wires at a predetermined position is introduced for the purpose of improving the assemblability of the motor, it is not always desirable that all the gaps between the leader wires are evenly spaced.

In view of the above situation, it is an object of the present invention to provide a motor capable of eliminating the inconvenience caused by the intervals between the lead wires of the coils being all equal.

An exemplary motor of the present invention includes a stator having a central axis extending in the vertical direction and a rotor that can rotate relative to the stator, and the stators are spaced apart from the coil in the circumferential direction. The gaps formed between the leader lines having a plurality of leader lines drawn in the axial direction and adjacent to each other in the circumferential direction are one or a plurality of first gaps including the gap having the maximum width in the circumferential direction and the first gap in the circumferential direction. It has one or more second gaps whose width is smaller than the first gap. The stator is configured by arranging twelve split core portions having one tooth in a ring shape in the circumferential direction, and one lead wire is wound around one of the split core portions in the pair of the split core portions. , The other divided core portion is wound around the other divided core portion via a crossing wire, and three sets of the divided core portions constitute six divided core portions on one side, and a pair of the six divided core portions on one side. Between the divided core portions of the above, two divided core portions of one of the other pair of the divided core portions are arranged, and the first divided core group composed of six divided core portions on one side thereof. The leader line located at the circumferential end and the leader line located at the circumferential end adjacent to the circumferential end of the second divided core group composed of the other six divided cores on one side. The first gap is formed by the above, and the plurality of the coils constitute a first coil group and a second coil group, and the first coil group includes a plurality of the plurality of the coils connected in series. The other ends of the plurality of first series connection configurations including the first series connection configuration are each connected to the first neutral point to form a star connection, and the second coil group is plural. Includes a plurality of second series connection configurations in which the coils are connected in series, and the other ends of the plurality of said second series connection configurations are each connected to a second neutral point to form a star connection. Configure.

According to an exemplary motor of the present invention, it is possible to eliminate the inconvenience caused by the intervals between the lead wires of the coils being all equal.

FIG. 1 is a schematic one-sided sectional view of a motor according to an embodiment of the present invention. FIG. 2 is a top view of the stator according to the embodiment of the present invention. FIG. 3 is a perspective view of the stator according to the embodiment of the present invention. FIG. 4 is a perspective view showing a pair of divided core portions (3 sets) used for assembling the stator. FIG. 5 is a plan view showing a step of preparing a stator in the method of manufacturing a motor according to an embodiment of the present invention. FIG. 6 is a plan view of an insertion member of a leader line positioning device used in the method for manufacturing a motor according to an embodiment of the present invention. FIG. 7 is a partially enlarged plan view of an insertion member of the leader line positioning device used in the method for manufacturing a motor according to an embodiment of the present invention. FIG. 8 is a plan view of an insertion member showing a positioning state of the inner positioning member of the leader line positioning device used in the method for manufacturing a motor according to an embodiment of the present invention. FIG. 9 is a plan view showing the first stage of the process of arranging the inner positioning member in the method of manufacturing the motor according to the embodiment of the present invention. FIG. 10 is a plan view showing a second stage of the process of arranging the inner positioning member in the method of manufacturing the motor according to the embodiment of the present invention. FIG. 11 is a plan view of an outer positioning member of the leader line positioning device used in the method for manufacturing a motor according to an embodiment of the present invention. FIG. 12 is a plan view showing a leader positioning step in the method for manufacturing a motor according to an embodiment of the present invention. FIG. 13 is a vertical cross-sectional view showing a leader positioning step in the motor manufacturing method according to the embodiment of the present invention. FIG. 14 is a perspective view showing a leader line support member and a stator. FIG. 15 shows a top view of the leader wire support member fixed to the stator. FIG. 16 is a top view of a state in which the bearing holding member is located above the leader wire support member. FIG. 17 is a top view showing a state in which the bus bar unit is fixed to the bearing holding member. FIG. 18 is a diagram showing a star connection configuration of the coil. FIG. 19 is a bottom view of the stator according to the modified example. FIG. 20 is a top view of the stator according to the modified example.

An exemplary embodiment of the present invention will be described below with reference to the drawings.

<1. Overall configuration of brushless motor>
First, the overall configuration of the motor according to the embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic one-sided sectional view of a motor A according to an embodiment of the present invention. The motor A shown in FIG. 1 is an inner rotor type brushless motor. The upper side of FIG. 1 in the CL direction of the central axis of the motor A is simply referred to as "upper side", and the lower side is simply referred to as "lower side". However, the vertical direction does not indicate the positional relationship and direction when incorporated into an actual device. Further, the direction parallel to the central axis CL is simply called "axial direction", the radial direction centered on the central axis CL is simply called "diametrical direction", and the circumferential direction centered on the central axis CL is simply called "circumferential direction". ".

As shown in FIG. 1, the motor A includes a housing 1, a stator 2, a rotor 3, a first bearing 41, a second bearing 42, a leader wire support member (coil support) 5, and a bearing holding member (bearing). A holder) 6 and a bus bar unit 7 are provided.

The housing 1 has a bottomed cylindrical shape centered on the central axis CL, and is formed by pressing a thin steel plate or the like. A bearing holding recess 11 that is cylindrically recessed in the axial direction is formed in the center of the bottom portion located below the housing 1. The second bearing 42 is held inside the bearing holding recess 11. Below the tubular portion 12 of the housing 1, a stator 2 arranged in an annular shape is fixed by press fitting.

The stator 2 has a stator core 21, an insulator 22, and a coil 23. As will be described later, the stator core 21 has an annular core back and a plurality of teeth radially inward from the core back toward the central axis CL. The insulating insulator 22 is mounted on the surface of the tooth. The coil 23 is formed by winding the lead wire in multiple layers in the axial direction (vertical direction) from above the insulator 22. In the stator 2, a plurality of coils 23 are arranged in an annular shape. From the coil 23, the leader wire 231 is drawn upward in the axial direction. A more detailed configuration of the stator 2 will be described later.

The leader wire support member 5 is arranged above the stator 2 and fixed to the insulator 22. The leader wire support member 5 has a plurality of holding portions 51. The holding portion 51 holds the leader line 231.

The bearing holding member 6 is arranged above the leader wire support member 5 and is fixed to the tubular portion 12 of the housing 1 by press fitting. The bearing holding member 6 holds the first bearing 41 in the central portion. The bearing holding member 6 has a plurality of through holes 61. A holding portion 51 is arranged inside the through hole 61. The leader wire 231 held by the holding portion 51 is pulled upward through the through hole 61.

The bus bar unit 7 is arranged above the bearing holding member 6 and is fixed to the bearing holding member 6. The bus bar unit 7 has a conductive bus bar 71 and a bus bar holding portion 72 for holding the bus bar 71. The bus bar 71 has a plurality of connecting portions 711. The leader wire 231 drawn upward from the through hole 61 penetrates the through hole 72B provided in the bus bar holding portion 72, and the end portion is connected and fixed to the connecting portion 711.

A more detailed configuration of the leader wire support member 5, the bearing holding member 6, and the bus bar unit 7 will also be described later.

The rotor 3 is arranged in the space surrounded by the stator 2. That is, the rotor 3 is arranged inside the stator 2 in the radial direction. The rotor 3 has a yoke 31, a rotor magnet 32, and a shaft 33.

The first bearing 41 and the second bearing 42 are arranged in pairs vertically. The shaft 33 is a rod-shaped member extending in the axial direction. The shaft 33 is rotatably supported by the first bearing 41 and the second bearing 42.

The yoke 31 is fixed at a position on the shaft 33 that overlaps the stator 2 in the radial direction. The yoke 31 is formed by laminating a plurality of steel plates formed of thin magnetic plates. A rotor magnet 32 is fixed to the outer peripheral surface of the yoke 31 with an adhesive.

The rotor 3 rotates relative to the stator 2 due to the interaction between the magnetic flux generated in the stator core 21 by supplying an electric current to the coil 23 and the magnetic flux generated by the rotor magnet 32.

<2. Stator configuration>
Next, the configuration of the stator 2 will be described in detail. FIG. 2 is a top view of the stator 2. FIG. 3 is a perspective view of the stator 2.

It is a substantially annular shape centered on the stator 2 and the central axis CL. The stator 2 has a stator core 21, an insulator 22, a coil 23, and an insulating sheet 24.

The stator core 21 is formed by laminating a plurality of magnetic steel plates in the axial direction (vertical direction). The stator core 21 has a core back 21A and a teeth 21B. The core back 21A has a substantially annular shape centered on the central axis CL. The teeth 21B extends radially inward from the inner peripheral portion of the core back 21A toward the central axis CL, and has a substantially T-shape when viewed from above. In the present embodiment, as an example, twelve teeth 21B are arranged side by side with a predetermined interval in the circumferential direction.

The insulator 22 is provided on the outer surface of the teeth 11B except for the inner peripheral portion. The insulator 22 is arranged between the stator core 21 and the coil 23. The insulator 22 is made of, for example, a synthetic resin material. The coil 23 is formed by winding a lead wire around the outer circumference of the teeth 11B via an insulator 22. In FIG. 2, 12 coils 23 are arranged in the circumferential direction.

The insulating sheet 24 is inserted and arranged between the adjacent coils 23 to insulate between the coils 23. The insulating sheet 24 is a strip-shaped member made of, for example, aramid paper or PET material, and is inserted between adjacent coils 23. The upper end of the insulating sheet 24 is bent and hooked on the upper surface of the coil 23. Although FIGS. 2 and 3 show a form in which the leader line 231 penetrates the bent portion of the insulating sheet 24, the bent portion of the insulating sheet 24 may be in a form of avoiding the leader line 231.

The stator 2 has a plurality of divided core portions 200 arranged in an annular shape in the circumferential direction. In FIG. 2, twelve divided core portions 200 are provided in the stator 2. The 12 divided core portions 200 are arranged in an annular shape in the circumferential direction and combined to form an annular stator 2. Each of the divided core portions 200 has an arc-shaped core back 21A1, one tooth 21B, an insulator 22A, and a coil 23. The divided core portion 200 has a groove portion 21C extending in the axial direction on the outer peripheral surface of the core back 21A1.

In FIG. 2, the stator 2 has twelve leader lines 231 extending from each of the plurality of split core portions 200. Each of the leader lines 231 is led out along the axial direction in the direction away from the coil 23.

Each of the twelve leader lines 231 has a first straight line portion 231A and a second straight line portion 231B. The first straight line portion 231A is closer to the coil 23 than the second straight line portion 231B and extends in a direction intersecting the axial direction. The second straight line portion 231B is separated from the coil 23 by the first straight line portion 231A and extends upward along the axial direction. The upper end of the second straight line portion 231B is connected to a bus bar (not shown in FIG. 2) described later.

The leader line 231 having such a first straight line portion 231A and a second straight line portion 231B is formed into an L shape by forming one linearly drawn leader line in the axial direction at the time of manufacturing the stator 2. It is composed of. However, depending on the specifications of the bus bar, it is not essential to mold it into an L shape.

A method of assembling the stator 2 from the 12 divided core portions 200 will be described. FIG. 4 is a perspective view showing a pair of split core portions used for assembling the stator 2. One coil 23 is formed by winding a lead wire around one of the teeth 21B of the pair of divided core portions 200. Another coil 23 is formed by winding the lead wire at the end of winding of the coil 23 around the teeth 21B in the other divided core portion 200. As a result, the crossover wire 232 is formed by straddling the lead wire between the pair of split core portions 200. Further, two leader wires 231 are formed by the winding start of one coil 23 and the winding end of the other coil 23 in the pair of divided core portions 200. Then, as shown in FIG. 4, three sets of a pair of split core portions 200 connected by such a crossover 232 are manufactured. The crossover 232 is covered with an insulating tube.

As shown in FIG. 2, in the stator 2, the first divided core group 2001 is composed of six divided core portions 200A to 200F on one side, and the second divided core group is composed of six divided core portions 200G to 200L on one side. 2002 is configured. One end in the circumferential direction of the first divided core group 2001 and one end in the circumferential direction of the second divided core group 2002 are connected by a first connecting portion CN1. The other end in the circumferential direction of the first divided core group 2001 and the other end in the circumferential direction of the second divided core group 2002 are connected by a second connecting portion CN2. Hereinafter, in each of the first divided core group 2001 and the second divided core group 2002, the circumferential direction approaching the first connecting portion CN1 is referred to as "one side in the circumferential direction", and the circumferential direction approaching the second connecting portion CN2 is referred to as "circumferential". It is called "the other side of the direction". In FIG. 2, “one side in the circumferential direction” is indicated by θa, and “the other side in the circumferential direction” is indicated by θb.

The pair of split core portions 200A and 200D, the pair of split core portions 200B and 200E, and the pair of split core portions 200C and 200F are a pair of split core portions 200 shown in FIG. 4, respectively. That is, a crossover 232 is formed between the divided core portions 200A and 200D, between the divided core portions 200B and 200E, and between the divided core portions 200C and 200F, respectively.

The first divided core group 2001 is formed by connecting three sets of such a pair of divided core portions, that is, six divided core portions in an arc shape. In the first division core group 2001, one division core portion 200B, 200C of the other pair of division core portions is arranged between the pair of division core portions 200A and 200D. Similarly, one of the other split core portions 200C and 200D is arranged between the pair of split core portions 200B and 200E, and the other is arranged between the pair of split core portions 200C and 200F. One of the pair of divided core portions 200D and 200E is arranged.

As a result, the crossover 232 drawn upward from one side end in the circumferential direction of the split core portion 200A passes through the upper surfaces of the split core portions 200B and 200C and is routed to the other end in the circumferential direction of the split core portion 200D. Will be done. The crossover 232 drawn upward from one side end in the circumferential direction of the split core portion 200B passes through the upper surfaces of the split core portions 200C and 200D and is routed to the other end in the circumferential direction of the split core portion 200E. The crossover 232 drawn upward from one side end in the circumferential direction of the split core portion 200C passes through the upper surfaces of the split core portions 200D and 200E and is routed to the other end in the circumferential direction of the split core portion 200F.

Further, the leader line 231 is led upward from each circumferential direction other end portion of the divided core portions 200A to 200C and each circumferential direction one side end portion of the divided core portions 200D to 200F. That is, in the first division core group 2001, six leader lines 231 are drawn out.

On the other hand, the pair of the split core portions 200G and 200J, the pair of the split core portions 200H and 200K, and the pair of the split core portions 200I and 200L are the pair of split core portions 200 shown in FIG. 4, respectively. That is, a crossover 232 is formed between the divided core portions 200G and 200J, between the divided core portions 200H and 200K, and between the divided core portions 200I and 200L, respectively.

The second divided core group 2002 is formed by connecting three sets of such a pair of divided core portions, that is, six divided core portions in an arc shape. In the second divided core group 2002, one divided core portion 200H, 200I of the other pair of divided core portions is arranged between the pair of divided core portions 200G and 200J. Similarly, one of the other split core portions 200I and 200J is arranged between the pair of split core portions 200H and 200K, and the other split core portions 200I and 200L are arranged between the pair of split core portions 200I and 200L. One of the pair of divided core portions 200J and 200K is arranged.

As a result, the crossover line 232 drawn upward from one side end in the circumferential direction of the split core portion 200G passes through the upper surfaces of the split core portions 200H and 200I and is routed to the other end in the circumferential direction of the split core portion 200J. Will be done. The crossover 232 drawn upward from one side end in the circumferential direction of the split core portion 200H passes through the upper surfaces of the split core portions 200I and 200J and is routed to the other end in the circumferential direction of the split core portion 200K. The crossover 232 drawn upward from one side end in the circumferential direction of the split core portion 200I is routed to the other end in the circumferential direction of the split core portion 200L through the upper surfaces of the split core portions 200J and 200K.

Further, the leader line 231 is led upward from each circumferential direction other end portion of the divided core portions 200G to 200I and each circumferential direction one side end portion of the divided core portions 200J to 200L. That is, in the second division core group 2002, six leader lines 231 are drawn out.

The 12 leader lines 231 of the stator 2 are formed into an L shape having a first straight line portion 231A and a second straight line portion 231B, respectively, as described above, and the ends of the second straight line portion 231B are the same in top view. Placed on a circle.

In FIG. 2, the angles of the two lines extending from the central axis CL so as to pass through the second straight line portion 231B adjacent in the circumferential direction are indicated by θ1 to θ4. Since the leader lines 231 drawn out in each of the adjacent split core portions 200F and 200L connected by the second connecting portion CN2 are both drawn out from one end in the circumferential direction, the second straight line of these leader lines 231. The angle θ1 corresponding to the gap of the portion 231B is a relatively large angle. Similarly, since the leader lines 231 drawn out in each of the adjacent split core portions 200A and 200G connected by the first connecting portion CN1 are drawn out from the other end in the circumferential direction, the leader lines 231 of these leader lines 231. The angle θ2 corresponding to the gap of the second straight line portion 231B is also a relatively large angle.

More specifically, in FIG. 2, the magnitude relationship of the angles is θ1> θ2> θ3> θ4. That is, θ1 is the largest at all angles, and θ2 is the second largest at all angles. Therefore, the circumferential width of the gap between the second straight portions 231B corresponding to θ1 is the maximum, and the circumferential width of the gap between the second straight portions 231B corresponding to θ2 is the second largest. As shown in FIG. 2, the first gap L1 is formed as such a gap having a relatively large circumferential width. The circumferential width of the gap between the second straight line portions 231B corresponding to the relatively small angles θ3 and θ4 is smaller than the circumferential width of the first gap L1. As shown in FIG. 2, a second gap L2 is formed as such a gap having a relatively small circumferential width. That is, two first gaps L1 and ten second gaps L2 are formed.

By forming the relatively large first gap L1 in this way, it becomes easy to insert a jig for positioning the leader wire as described later into the first gap L1, and the assembleability of the motor A can be improved. Further, it is also possible to correspond to a bus bar in which the arrangement of the connecting portions to which the leader lines to be connected and fixed, which will be described later, are not evenly spaced.

That is, the motor A of the present embodiment includes a stator 2 having a central axis CL extending in the vertical direction and a rotor 3 that can rotate relative to the stator 2.
The stator 2 has a plurality of leader lines 231 drawn from the coil 23 in the axial direction at predetermined intervals in the circumferential direction.
The gaps formed between the leader lines 231 adjacent to each other in the circumferential direction are a plurality of first gaps L1 including a gap having the maximum circumferential width and a plurality of second gaps having a circumferential width smaller than the first gap L1. It has L2 and.

With such a configuration, the intervals between the leader lines are not equal, and it is possible to eliminate the inconvenience caused by the equal intervals. The inconvenience is not limited to the inconvenience when inserting the jig and the inconvenience to the specifications of the bus bar, and may be other inconveniences.

Further, in the embodiment of FIG. 2, the plurality of first gaps L1 have different widths in the circumferential direction, but they may have the same size. Further, the first gap L1 is not limited to two, and may be a plurality of three or more, or may be only one. The number of the second gap L2 is not limited to a plurality, and may be only one. Further, in the above embodiment, the width of the second gap L2 in the circumferential direction is larger than that of the other portions corresponding to θ4 only at the portion corresponding to the angle θ3, but all of them may have the same size. Various embodiments can be adopted for the first gap and the second gap as long as the first gap is generally larger in the circumferential direction than the second gap, regardless of the number of the first gap.

Further, in the present embodiment, more specifically, the stator 2 is configured by arranging 12 divided core portions 200 having one tooth 21B in an annular shape in the circumferential direction.
In the pair of split core portions 200, one lead wire is wound around one split core portion 200, and is wound around the other split core portion 200 via the crossover wire 232.
Three sets of a pair of split core portions 200 form six split core portions 200 on each side.
In the six split core portions 200 on one side, two split core portions 200 on one side of the other pair of split core portions 200 are arranged between the pair of split core portions 200.

Then, a leader line (leader line of the divided core portion 200A or 200F) 231 located at the circumferential end of the first divided core group 2001 composed of six divided core portions 200 on one side and one side of the other side. By a leader line (leader line possessed by the divided core portion 200G or 200L) 231 located at the circumferential end portion adjacent to the circumferential end portion of the second divided core group 2002 composed of the six divided core portions 200. The first gap L1 is formed.

<3. Leader line positioning process>
Next, the positioning step of the leader wire 231 using the jig will be described in detail in relation to forming the first gap L1 and the second gap L2 of the leader wire 231 in the stator 2 as described above. Hereinafter, various steps will be described in order.

FIG. 5 is a plan view showing a step of preparing the stator 2 in the method for manufacturing the motor A according to the embodiment of the present invention.

The stator 2 shown in FIG. 5 is arranged on a mounting table (not shown) of the leader line positioning device 100. The leader line 231 is in a state in which the molding of the first straight line portion 231A and the second straight line portion 231B is completed. The second straight line portion 231B extends substantially linearly upward along the axial direction.

FIG. 6 is a plan view of the insertion member 130 of the leader line positioning device 100 used in the method for manufacturing the motor A according to the embodiment of the present invention. FIG. 7 is a partially enlarged plan view of the insertion member 130 of the leader line positioning device 100 used in the method for manufacturing the motor A according to the embodiment of the present invention. FIG. 8 is a plan view of the insertion member 130 showing the positioning state of the inner positioning member 110 of the leader line positioning device 100 used in the method for manufacturing the motor A according to the embodiment of the present invention. FIG. 9 is a plan view showing the first stage of the process of arranging the inner positioning member 110 in the method of manufacturing the motor 1 according to the embodiment of the present invention. FIG. 10 is a plan view showing a second stage of the arrangement process of the inner positioning member 110 in the method for manufacturing the motor A according to the embodiment of the present invention.

The leader line positioning device 100 has an inner positioning member 110 shown in FIG. 5 in addition to the mounting table.

The inner positioning member 110 is arranged on the outer side in the radial direction of the stator 2 in the stage prior to the positioning of the leader wire 231. For example, four inner positioning members 110 are provided. Two inner positioning members 110 are provided on each of the pair of insertion members 130. That is, in the leader line positioning device 100, two sets of a pair of insertion members 130 are used. The pair of insertion members 130 can be moved in the direction of approaching and separating from the leader line 231 and the insertion member 130 can be rotated by a moving mechanism (not shown).

As shown in FIGS. 5 and 6, the jig composed of the pair of insertion members 130 is formed in a so-called scissors shape, and the insertion members 130 can rotate around a rotation axis 131 extending along the axial direction of each other. is there. The insertion member 130 extends along the radial direction in a state where the regions corresponding to each of the two blades of the scissors are closed. The inner positioning member 110 is arranged at the tip portion on the inner side in the radial direction of the insertion member 130. The two inner positioning members 110 are individually provided in the region of the insertion member 130 corresponding to each of the two blades of the scissors. The inner positioning member 110 is rotatable together with the insertion member 130 around a rotation shaft 131 arranged radially outside the inner positioning member 110 (see FIG. 8).

Each of the four inner positioning members 110 individually has three recesses 111. The recess 111 is provided in a region of the inner positioning member 110 facing the leader line 231 when the inner positioning member 110 is arranged on the CL side of the central axis with respect to the leader line 231, and is provided along a direction intersecting the axial direction. It is dented in the direction away from the leader line 231. The recess 111 has a shape and size that can accept the leader wire 231.

The recess 111 can come into contact with the leader line 231 from the CL side of the central axis of the leader line 231. Further, since the inner positioning member 110 has three recesses 111, the inner positioning member 110 comes into contact with the three leader lines 231 from the central axis CL side of the leader lines 231. The three recesses 111 provided in the single inner positioning member 110 clearly define the spacing and positional relationship of the three leader lines 231 with respect to the direction intersecting the axial direction. According to this configuration, the number of parts can be reduced. Further, it is possible to improve the workability related to the arrangement of the inner positioning member 110.

As shown in FIGS. 6 and 7, the inner positioning member 110 includes a radial inner positioning member 110A and a circumferential inner positioning member 110B. The radial inner positioning member 110A and the circumferential inner positioning member 110B are arranged side by side in the axial direction. The radial inner positioning member 110A and the circumferential inner positioning member 110B each have recesses 111A and 111B at the same positions with respect to the direction intersecting the axial direction. The recess 111 includes the recess 111A and the recess 111B.

The radial inner positioning member 110A is configured as the same member as the insertion member 130. The radial inner positioning member 110A has three recesses 111A. The recess 111A has a curved wall surface that is gentler than the recess 111B of the circumferential inner positioning member 110B, for example, an arc-shaped wall surface. With the recess 111A of this shape, the radial inner positioning member 110A positions the leader wire 231 in the radial direction.

The circumferential inner positioning member 110B is arranged in contact with the axial lower surface of the radial inner positioning member 110A. The circumferential inner positioning member 110B has three recesses 111B. The recess 111B has a curved wall surface that is steeper than the recess 111A of the radial inner positioning member 110A, for example, a V-shaped wall surface. The concave portion 111B having this shape allows the circumferential inner positioning member 110B to position the leader wire 231 in the circumferential direction.

The inner positioning member 110 positions the leader line 231 in the radial direction and the circumferential direction by the recesses 111A and 111B. By combining the radial inner positioning member 110A and the circumferential inner positioning member 110B, the leader wire 231 can be positioned at an appropriate position.

The pair of insertion members 130 may intersect with each other and rotate, but may not intersect with each other. Further, the radial inner positioning member 110A may be configured as a separate member of the insertion member 130. Then, the circumferential inner positioning member 110B may be configured as the same member as the insertion member 130.

In the process of arranging the inner positioning member 110, as shown in FIG. 9, the inner positioning member 110 keeps the pair of insertion members 130 closed and passes through the first gap L1 which is a gap between adjacent leader lines 231. It is inserted into the CL side of the central axis of the leader wire 231 from the radial outside of the stator 2. That is, when the pair of insertion members 130 are inserted and removed from each other's inner positioning members 110 with respect to the central axis CL side of the leader line 231, they are rotated and the inner positioning members 110 are brought closer to each other.

Subsequently, as shown in FIG. 10, the inner positioning member 110 moves each of the two inner positioning members 110 radially outward by opening the so-called scissors of the pair of insertion members 130. In the inner positioning member 110, the portions of the three recesses 111 move outward in the radial direction toward the leader line 231. In the inner positioning member 110, each of the three recesses 111 comes into contact with the three leader lines 231 from the central axis CL side of the leader line 231. That is, when the pair of insertion members 130 come into contact with each other's inner positioning members 110 with respect to the leader line 231, they are rotated and the inner positioning members 110 are separated from each other. According to this configuration, the inner positioning member 110 on the central axis CL side of the leader line 231 is opened by opening the region corresponding to each of the two blades of the scissors of the pair of insertion members 130 formed in the so-called scissors shape. Easy to move.

FIG. 11 is a plan view of the outer positioning member 120 of the leader line positioning device 100 used in the method for manufacturing the motor A according to the embodiment of the present invention. FIG. 12 is a plan view showing a positioning step of the leader wire 231 in the method for manufacturing the motor A according to the embodiment of the present invention. FIG. 13 is a vertical cross-sectional view showing a positioning step of the leader wire 231 in the method for manufacturing the motor A according to the embodiment of the present invention. Note that FIG. 13 is a partial cross-sectional view taken along the axial direction in the line XIII-XIII shown in FIG.

The leader line positioning device 100 has an outer positioning member 120 shown in FIG. 5 in addition to a mounting table and an inner positioning member 110.

The outer positioning member 120 is arranged radially outside the stator 2 in the stage prior to positioning the leader wire 231. The outer positioning member 120 is provided with the same number as the inner positioning member 110, for example, four. The four outer positioning members 120 are arranged side by side at predetermined intervals in the circumferential direction. The outer positioning member 120 can be moved in the direction of approaching and separating from the leader line 231 by a moving mechanism (not shown).

Each of the four outer positioning members 120 individually has three recesses 121. The recess 121 is provided in a region of the outer positioning member 120 facing the leader line 231 and is recessed in a direction away from the leader line 231 along a direction intersecting the axial direction. The recess 121 has a shape and size that can accept the leader wire 231.

The recess 121 is accessible to the leader line 231 from the opposite side of the leader line 231 with respect to the central axis CL. Since the outer positioning member 120 has three recesses 121, it comes into contact with the three leader lines 231 from the opposite side of the leader line 231 with respect to the central axis CL. The three recesses 121 provided in the single outer positioning member 120 clearly define the spacing and positional relationship of the three leader lines 231 with respect to the direction intersecting the axial direction. According to this configuration, the number of parts can be reduced. Further, it is possible to improve the workability related to the arrangement of the outer positioning member 120.

As shown in FIG. 11, the outer positioning member 120 includes a radial outer positioning member 120A and a circumferential outer positioning member 120B. The radial outer positioning member 120A and the circumferential outer positioning member 120B are arranged side by side in the axial direction. The radial outer positioning member 120A and the circumferential outer positioning member 120B each have recesses 121A and 121B at the same positions in the direction intersecting the axial direction. The recess 121 includes the recess 121A and the recess 121B.

The radial outer positioning member 120A has one recess 121A. The recess 121A has a curved wall surface that is gentler than the recess 121B of the circumferential outer positioning member 120B, for example, an arc-shaped wall surface. With the recess 121A of this shape, the radial outer positioning member 120A positions the leader wire 231 in the radial direction.

The circumferential outer positioning member 120B is arranged in contact with the axial upper surface of the radial outer positioning member 120A. The circumferential outer positioning member 120B has three recesses 121B. The recess 121B has a curved wall surface that is steeper than the recess 121A of the radial outer positioning member 120A, for example, a V-shaped wall surface. The concave portion 121B having this shape allows the circumferential outer positioning member 120B to position the leader line 231 in the circumferential direction.

The outer positioning member 120 positions the leader line 231 in the radial direction and the circumferential direction by the recesses 121A and 121B. By combining the radial outer positioning member 120A and the circumferential outer positioning member 120B, the leader wire 231 can be positioned at an appropriate position.

In the positioning step of the leader line 231, as shown in FIG. 12, the outer positioning member 120 approaches the leader line 231 from the radial outside of the stator 2 toward the central axis CL side. Then, in the outer positioning member 120, each of the three recesses 121 comes into contact with the three leader lines 231 from the opposite side of the leader line 231 with respect to the central axis CL. As a result, the 12 leader wires 231 are individually sandwiched between the recess 111 of the inner positioning member 110 and the recess 121 of the outer positioning member 120, and are positioned at appropriate positions. Therefore, the leader line positioning device 100 can efficiently arrange the leader lines 231 at predetermined positions, and the motor A can be manufactured in a short time.

Then, the inner positioning member 110 is in contact with a plurality of leader lines 231 from the central axis CL side of the leader line 231, and the outer positioning member 120 is in contact with the plurality of leader lines 231 as a single unit. There are three leader lines 231 that are in contact with each other from the opposite side of the central axis CL and have the same number of leader lines 231. According to this configuration, when the leader wire 231 is sandwiched between the inner positioning member 110 and the outer positioning member 120, it is possible to suppress the occurrence of misalignment of the leader wire 231.

When the positioning of the leader line 231 is completed, the inner positioning member 110 and the outer positioning member 120 are arranged with respect to the leader line 231 as shown in FIG. The inner positioning member 110 and the outer positioning member 120 are arranged at different heights in the axial direction.

According to this configuration, the depth of the recess 111B of the circumferential inner positioning member 110B and the recess 121B of the circumferential outer positioning member 120B can be increased. This makes it possible to improve the positioning accuracy of the leader wire 231. The configuration in which the depths of the recesses 111B and 121B are relatively long facilitates the movement of the leader line 231 to the predetermined position even when the leader line 231 before positioning is relatively largely deviated from the predetermined position. Further, according to this configuration, it is possible to avoid contact between the inner positioning member 110 and the outer positioning member 120 in the direction intersecting the axial direction. This makes it easier to arrange the mechanism for moving the inner positioning member 110 and the outer positioning member 120.

In particular, in the present embodiment, the stator 2 is provided with the first gap L1, which is a relatively large gap between the adjacent leader lines 231. Therefore, as shown in FIG. 9, for positioning the leader lines 231. It becomes easy to insert the pair of insertion members 130 into the first gap L1 from the outer side in the radial direction toward the central axis CL.

Further, in the present embodiment, two first gaps L1 are provided. As a result, positioning of all the leader wires 231 from the inside in the radial direction can be handled by using two jigs composed of a pair of insertion members 130, so that the jig can be made a simple configuration. It should be noted that such an effect is the same when the number of the first gaps L1 is three or four.

Further, in the present embodiment, the two first gaps L1 are arranged point-symmetrically with respect to the central axis CL. As a result, since the leader wire 231 that inserts the jig composed of the pair of insertion members 130 into each first gap L1 and performs positioning is the leader wire in the equally divided region, the two jigs have the same structure. Can be. That is, the types of jigs can be reduced. It should be noted that such an effect is the same even when the first gap L1 is three or four, as long as two of them are arranged point-symmetrically with respect to the central axis CL.

Further, in the present embodiment, the number of the leader wires 231 which are 12 is the same as the number of the coils 23 included in the stator 2. As a result, the circumferential width of each gap formed between the adjacent leader lines 231 becomes smaller, so that it is more effective to provide a relatively large gap in the first gap L1.

Further, in the present embodiment, as shown in FIG. 2, the second straight line portion 231B of the leader line 231 is drawn out in the axial direction from the substantially inner peripheral side edge of the annular stator 2. That is, the leader wire 231 is led out from the inner diameter side of the stator 2. As a result, the circumference on the inner diameter side of the stator 2, that is, the circumference of the same circle including the position where each leader line 231 is pulled out, becomes smaller than the circumference on the outer diameter side of the stator 2. Therefore, it becomes difficult to secure a gap between adjacent leader lines 231. Therefore, it is more effective to provide a relatively large gap by the first gap L1.

<4. Leader support member>
Next, the configuration of the leader wire support member 5 will be described in detail. As described above, the leader wire support member 5 is a member fixed to the upper side in the axial direction of the stator 2. FIG. 14 is a perspective view showing the leader line support member 5 and the stator 2.

As shown in FIG. 14, the leader line support member 5 is an annular member centered on the central axis CL. The leader line support member 5 has a circular opening 50. The opening 50 is provided at a substantially central portion in the radial direction. The leader line support member 5 has a plurality of holding portions 51 and a plurality of leg portions 52.

The holding portion 51 is provided along the circumference of the opening 50. The same number of holding portions 51 as the leader lines 231, that is, twelve are arranged at predetermined positions. The holding portion 51 has a shape obtained by dividing a cylinder along the axial direction. The holding portion 51 has an accommodating portion 51A which is a groove portion extending in the axial direction. The holding portion 51 may be formed of a complete cylinder. The holding portion 51 individually accommodates and supports each of the plurality of leader lines 231 in the accommodating portion 51A.

A plurality of leg portions 52 are provided on the outer peripheral portion of the lower surface of the leader wire support member 5. The leg portion 52 extends downward in the axial direction. The leg portion 52 has a shape and size that fits into the groove portion 22A1 provided on the upper outer peripheral portion of the insulator 22A. The groove 22A1 extends in the axial direction.

The leader wire support member 5 is fixed to the stator 2 in the following process. Before fixing the leader wire support member 5 to the stator 2, the leader wire 231 is positioned by the leader wire positioning device 100 as shown in FIG. 12 in advance. Then, in that state, the leader wire support member 5 is fixed by approaching the stator 2 from the upper side in the axial direction. At this time, the second straight line portion 231B of each leader line 231 is accommodated in each accommodating portion 51A, and the leg portion 52 is fitted into the groove portion 22A1. After fixing the leader wire support member 5, the insertion member 130 and the outer positioning member 120 are removed from the stator 2.

FIG. 15 shows a top view of the leader wire support member 5 fixed to the stator 2. In addition, in FIG. 15, the rotor 3 is also shown. Each holding portion 51A maintains a posture of the second straight portion 231B of the leader line 231 at a predetermined position. The holding portions 51A are arranged at predetermined intervals in the circumferential direction. Of the gaps formed between the holding portions 51 adjacent in the circumferential direction, the two third gaps L3 are arranged point-symmetrically with respect to the central axis CL. One of the third gaps L3 is axially opposed to the first gap L1 corresponding to the angle θ1 in the stator 2 shown in FIG. 2, and the other is axially opposed to the first gap L1 corresponding to the angle θ2. That is, the two third gaps L3 have different circumferential widths from each other.

Of the gaps formed between the holding portions 51 adjacent to each other in the circumferential direction, the fourth gap L4 other than the third gap L3 is the shaft with the second gap L2 corresponding to the angles θ3 and θ4 in the stator 2 shown in FIG. Oppose in the direction. That is, the fourth gap L4 has a smaller circumferential width than the third gap L3.

As described above, the motor A according to the present embodiment further includes a leader wire support member 5 having a plurality of holding portions 51 for maintaining the posture of the leader wire 231 at a predetermined position.
The holding portions 51 are arranged at predetermined intervals in the circumferential direction.
The gaps formed between the holding portions 51 adjacent to each other in the circumferential direction are a plurality of third gaps L3 including a gap having the maximum peripheral width and a plurality of fourth gaps having a circumferential width smaller than the third gap L3. Has L4 and
The third gap L3 is arranged so as to face the first gap L1 in the axial direction.
The fourth gap L4 is arranged so as to face the second gap L2 in the axial direction.

According to such a configuration, the leader wire 231 can be positioned by easily inserting the jig into the first gap L1 in the stator 2, and then the leader wire support member 5 can be fixed to the stator 2, so that the leader wire support can be supported. Assembling of the member 5 becomes easy. The number of the third gap L3 and the fourth gap L4 is not limited to a plurality, and may be one.

Further, as shown in FIG. 15, the leg portion 52 is arranged on the lower side in the axial direction at a position facing the fourth gap L4 in the radial direction, and is fitted into each groove portion 22A1 of the insulator 22 in the stator 2. Each groove portion 22A1 faces the second gap L2 in the radial direction.

That is, the leader line support member 5 has a plurality of legs 52 extending axially toward the stator 2 at predetermined intervals in the circumferential direction.
The leg portion 52 is positioned so as to overlap the second gap L2 in the radial direction.

As a result, the leg portion 52 is not arranged at a position where it overlaps with the first gap L1 in the radial direction. Therefore, the leader wire support member 5 is placed on the stator 2 in a state where the leader wire 231 is positioned by inserting the jig into the first gap L1. It is possible to prevent the leg portion 52 from interfering with the jig when it is fixed to the jig.

The leg portion 52 may be fixed to the groove portion 21A11 (see FIG. 14) formed so as to extend in the axial direction on the outer peripheral wall surface of the core back 21A1.

<5. Bearing holding member>
Next, the bearing holding member 6 will be described in detail. As described above, the bearing holding member 6 is a member that holds the first bearing 41, and is press-fitted and fixed to the inner wall surface of the tubular portion 12 of the housing 1 (FIG. 1). The bearing holding member 6 is arranged on the upper side in the axial direction of the leader wire support member 5.

FIG. 16 is a top view of a state in which the bearing holding member 6 is located above the leader wire support member 5. In addition, in FIG. 16, the rotor 3 is also shown. As shown in FIG. 16, the bearing holding member 6 has an opening 60 at the center, and the first bearing 41 is held by the holding portion including the opening 60.

The bearing holding member 6 has a plurality of through holes 61 arranged at predetermined intervals in the circumferential direction on the radial outer side of the opening 60. Each through hole 61 houses the holding portion 51 of the leader wire support member 5 inside. Since the holding portion 51 accommodates the second straight line portion 231B of the leader line 231 so, the second straight line portion 231B penetrates the through hole 61 upward in the axial direction.

Of the gaps formed between the through holes 61 adjacent in the circumferential direction, the two fifth gaps L5 are arranged point-symmetrically with respect to the central axis CL. The fifth gap L5 faces the third gap L3 of the leader line support member 5 in the axial direction. Of the gaps formed between the through holes 61 adjacent in the circumferential direction, the sixth gap L6 other than the fifth gap L5 faces the fourth gap L4 of the leader line support member 5 in the axial direction.

That is, the motor A according to the present embodiment further includes a bearing holding member 6 having a plurality of through holes 61 through which the leader wire 231 penetrates while holding the bearing portion 41.
The through holes 61 are arranged at predetermined intervals in the circumferential direction.
The gaps formed between the through holes 61 adjacent to each other in the circumferential direction are a plurality of fifth gaps L5 including a gap having the maximum width in the circumferential direction and a plurality of sixth gaps having a width in the circumferential direction smaller than the fifth gap L5. Has L6 and
The fifth gap L5 is arranged so as to face the first gap L1 in the axial direction.
The sixth gap L6 is arranged so as to face the second gap L2 in the axial direction.

According to such a configuration, the bearing holding member 6 can be fixed after positioning the leader wire 231 by easily inserting the jig into the first gap L1 in the stator 2, so that the bearing holding member 6 can be assembled. It will be easy. The number of the fifth gap L5 and the sixth gap L6 is not limited to a plurality, and may be one.

Further, it is not essential to provide the leader wire support member 5 in the motor A having the bearing holding member 6.

<6. Busbar unit>
Next, the configuration of the bus bar unit 7 will be described in detail. As described above, the bus bar unit 7 is arranged on the upper side in the axial direction of the bearing holding member 6 and is fixed to the bearing holding member 6 (FIG. 1). FIG. 17 is a top view showing a state in which the bus bar unit 7 is fixed to the bearing holding member 6. In addition, in FIG. 17, the rotor 3 is also shown.

The bus bar unit 7 has a conductive bus bar 71 and a bus bar holding portion 72 for holding the bus bar 71. The bus bar holding portion 72 is an annular member having a through hole 72A in the central portion. The bus bar holding portion 72 is made of an insulating material such as resin and is fixed to the bearing holding member 6.

The bus bar 71 includes bus bars 71A to 71H, which are separated and insulated from each other, and is arranged on the upper surface of the bus bar holding portion 72. The bus bar 71 has a plurality of connecting portions 711 arranged in the circumferential direction on the radial outer side of the through hole 72A. The connection unit 711 includes the connection unit 71A1 and the like described below. The bus bar 71 is formed of a conductive material such as copper.

The bus bar 71A has a substantially V-shaped connecting portion 71A1 at one end. The other connecting portions have the same shape as the connecting portion 71A1. The other end of the bus bar 71A is connected to the external connection terminal T1.

The bus bar 71B for the neutral point has connecting portions 71B1, 71B2, and 71B3 at each end.

The bus bar 71C has a connecting portion 71C1 at one end. The other end of the bus bar 71C is connected to the external connection terminal T2. The bus bar 71D has a connecting portion 71D1 at one end. The other end of the bus bar 71D is connected to the external connection terminal T3. The bus bar 71E has a connecting portion 71E1 at one end. The other end of the bus bar 71E is connected to the external connection terminal T4.

The bus bar 71F for the neutral point has connecting portions 71F1, 71F2, and 71F3 at each end.

The bus bar 71G has a connecting portion 71G1 at one end. The other end of the bus bar 71G is connected to the external connection terminal T5. The bus bar 71H has a connecting portion 71H1 at one end. The other end of the bus bar 71H is connected to the external connection terminal T6.

With the bus bar unit 7 fixed to the bearing holding member 6, each of the 12 connecting portions such as the connecting portion 71A1 accommodates the end portion of the second straight portion 231B of each leader wire 231 inside, and is subjected to caulking processing. It is connected and fixed to the end of the second straight line portion 231B. At this time, the second straight line portion 231B penetrates the bus bar holding portion 72 in the axial direction.

The electrical connection between the bus bar 71 and each leader wire 231 forms a wiring configuration of the coil 23 as shown in FIG. The coils 23A to 23L shown in FIG. 18 correspond to the coils 23 in the divided core portions 200A to 200L shown in FIG.

As shown in FIG. 18, in the present embodiment, the other end of the series connection configuration of the coils 23C and 23F whose one end is connected to the external connection terminal T2 and the coil 23B whose one end is connected to the external connection terminal T3. , The other end of the series connection configuration of 23E and the other end of the series connection configuration of the coils 23A and 23D whose one end is connected to the external connection terminal T4 are connected at the neutral point to form a star connection. The first coil group LG1 is configured by the above.

Further, the other end of the series connection configuration of the coils 23J and 23G whose one end is connected to the external connection terminal T5 and the other end of the series connection configuration of the coils 23K and 23H whose one end is connected to the external connection terminal T6. And the other end of the series connection configuration of the coils 23L and 23I whose one end is connected to the external connection terminal T1 are connected at the neutral point to form the second coil group LG2 by star connection. ..

Further, as shown in FIG. 17, among the gaps formed between the connecting portions adjacent in the circumferential direction, the first gap formed between the connecting portions 71A and 71B1 and between the connecting portions 71D1 and 71E1 respectively. The 7 gaps L7 are arranged point-symmetrically with respect to the central axis CL. The seventh gap L7 is axially opposed to the fifth gap L5 in the bearing holding member 6. Of the gaps formed between the connecting portions adjacent in the circumferential direction, the eighth gap L8 other than the seventh gap L7 faces the sixth gap L6 in the bearing holding member 6 in the axial direction.

That is, the motor A according to the present embodiment includes a bus bar unit 7 having a bus bar 71 having a plurality of connecting portions 711 (71A1 and the like) to which the leader line 231 is connected, and a bus bar holding portion 72 for holding the bus bar 71. Further prepare
The connecting portions 711 are arranged at predetermined intervals in the circumferential direction.
The gaps formed between the connecting portions 711 adjacent to each other in the circumferential direction are a plurality of seventh gaps L7 including a gap having the maximum circumferential width and a plurality of eighth gaps having a circumferential width smaller than the seventh gap L7. With L8,
The seventh gap L7 is arranged so as to face the first gap L1 in the axial direction.
The eighth gap L8 is arranged so as to face the second gap L2 in the axial direction.

According to such a configuration, the bus bar unit 7 can be fixed after positioning the leader wire 231 by easily inserting the jig into the first gap L1 in the stator 2, so that the bus bar unit 7 can be easily assembled. Become. The number of the seventh gap L7 and the eighth gap L8 is not limited to a plurality, and may be one.

Further, the bus bar unit 7 does not necessarily have to be arranged above the bearing holding member 6. For example, the bus bar unit 7 may be fixed to the stator 2, and the bearing holding member 6 may be arranged above the bus bar unit 7. In this case, the leader wire support member 5 is unnecessary.

<7. Deformation example of stator>
Next, a modification of the stator according to the above embodiment will be described. FIG. 19 is a bottom view of the stator 8 according to the modified example. FIG. 20 is a top view of the stator 8 according to the modified example.

As shown in FIGS. 19 and 20, the stator 8 according to the modified example is composed of 12 divided core portions 80A to 80L. Also in this modification, as in the previous embodiment, the stator 8 is configured by combining a pair of split core portions connected by a crossover.

The pair of the split core portions 80A and 80D, the pair of the split core portions 80B and 80E, and the pair of the split core portions 80C and 80F are a pair of split core portions, respectively. In this pair of split core portions, one end of the coil 23 of one split core portion and one end of the coil 23 of the other split core portion are connected by a crossover 232A. Further, the leader wire 231 is drawn from the other end of the coil 23 of one split core portion, and the leader wire 231 is pulled out from the other end of the coil 23 of the other split core portion. By connecting the pair of the split core portions 80A and 80D, the pair of the split core portions 80B and 80E, and the pair of the split core portions 80C and 80F, the first split core group 8001 which is six split core portions on one side is formed. Will be done. In the first division core group 8001, the crossover line 232A is arranged on the lower surface of the stator 8 (FIG. 19), and the leader line 231 is drawn out from the upper surface of the stator 8 (FIG. 20).

On the other hand, the pair of the split core portions 80G and 80J, the pair of the split core portions 80H and 80K, and the pair of the split core portions 80I and 80L are a pair of split core portions, respectively. In this pair of split core portions, one end of the coil 23 of one split core portion and one end of the coil 23 of the other split core portion are connected by a crossover 232B. Further, the leader wire 231 is drawn from the other end of the coil 23 of one split core portion, and the leader wire 231 is pulled out from the other end of the coil 23 of the other split core portion. By connecting the pair of the split core portions 80G and 80J, the pair of the split core portions 80H and 80K, and the pair of the split core portions 80I and 80L, the second split core group 8002 which is six split core portions on one side is formed. Will be done. In the second split core group 8002, the crossover line 232B is arranged on the lower surface of the stator 8 (FIG. 19), and the leader line 231 is drawn out from the upper surface of the stator 8 (FIG. 20).

One end in the circumferential direction of the first divided core group 8001 and one end in the circumferential direction of the second divided core group 8002 are connected by a first connecting portion CN11. The other end in the circumferential direction of the first divided core group 8001 and the other end in the circumferential direction of the second divided core group 8002 are connected by a second connecting portion CN12. Hereinafter, in each of the first divided core group 8001 and the second divided core group 8002, the circumferential direction approaching the first connecting portion CN11 is referred to as "one side in the circumferential direction", and the circumferential direction approaching the second connecting portion CN12 is referred to as "circumferential". It is called "the other side of the direction". In FIGS. 19 and 20, “one side in the circumferential direction” is indicated by θa, and “the other side in the circumferential direction” is indicated by θb.

In the first division core group 8001, the crossover line 232A drawn downward from one end in the circumferential direction of the division core portion 80A passes through the lower surfaces of the division core portions 80B and 80C and passes through the lower surfaces of the division core portions 80B and 80C in the circumferential direction of the other division core portion 80D. It is routed to the side end. The crossover 232A drawn downward from one side end in the circumferential direction of the split core portion 80B is routed to the other end in the circumferential direction of the split core portion 80E through the lower surfaces of the split core portions 80C and 80D. .. The crossover 232A drawn downward from one side end in the circumferential direction of the split core portion 80C is routed to the other end in the circumferential direction of the split core portion 80F through the lower surfaces of the split core portions 80D and 80E. ..

In the second split core group 8002, the crossover line 232B drawn downward from the other end in the circumferential direction of the split core portion 80G passes through the lower surfaces of the split core portions 80H and 80I and is one of the circumferential directions of the split core portion 80J. It is routed to the side end. The crossover 232B drawn downward from the other end in the circumferential direction of the split core portion 80H is routed to the one end in the circumferential direction of the split core portion 80K through the lower surfaces of the split core portions 80I and 80J. .. The crossover 232B drawn downward from the other end in the circumferential direction of the split core portion 80I is routed to the one end in the circumferential direction of the split core portion 80L through the lower surfaces of the split core portions 80J and 80K. ..

In this modification, the crossover line 232B is shorter than the crossover line 232A due to the routing of the crossover lines 232A and 232B.

Further, on the upper surface side of the stator 8, in the adjacent split core portions 80I and 80J, a leader line 231 is drawn from one side in the circumferential direction of the split core portion 80I, and a leader line is drawn from the other side in the circumferential direction of the split core portion 80J. 231 is pulled out. Further, in the adjacent divided core portions 80C and 80D, the leader line 231 is drawn out from the other side in the circumferential direction of the divided core portion 80C, and the leader line 231 is drawn out from one side in the circumferential direction of the divided core portion 80D.

As a result, the circumferential width of the gap formed between the leader lines 231 drawn from the split core portions 80I and 80J is maximized, and the gap formed between the leader lines 231 drawn from the split core portions 80C and 80D is maximized. The circumferential width is the minimum. Therefore, the gap formed between the leader lines 231 drawn from the split core portions 80I and 80J becomes the first gap L1, and includes the gap formed between the leader lines 231 drawn from the split core portions 80C and 80D. The gap other than the first gap L1 is the second gap L2. That is, there is only one first gap L1.

Even with such a modification, it is possible to avoid the inconvenience caused by the equal spacing of the leader lines.

<8. Others>
Although the embodiments of the present invention have been described above, the embodiments can be changed in various ways within the scope of the gist of the present invention.

For example, in the above-described embodiment, the inner rotor type motor is used as the motor, but for example, the present invention can be applied to a so-called axial type motor in which the rotor is arranged so as to face the stator in the axial direction. ..

The present invention can be widely used in various motors such as those for automobiles.

A ... motor, 1 ... housing, 2 ... stator, 21 ... stator core, 21A ... core back, 21A1 ... core back, 21A11 ... groove, 21B ... teeth, 22 ... Insulator, 22A ... Insulator, 22A1 ... Groove, 23 ... Coil, 231 ... Leader, 231A ... First straight part, 231B ... Second straight part, 24 ... Insulating paper, 200 ... Divided core part, 200A to 200L ... Divided core part, 2001 ... 1st divided core group, 2002 ... 2nd divided core group, 232 ... Crossing wire 3, 3 ... Rotor, 31 ... Yoke, 32 ... Rotor magnet, 33 ... Shaft, 41 ... 1st bearing, 42 ... 2nd bearing, 5 ... Leader wire support member , 50 ... opening, 51 ... holding part, 52 ... leg, 6 ... bearing holding member, 60 ... opening, 61 ... through hole, 7 ... bus bar unit , 71 ... Bus bar, 711, 71A1, 71B1 to 71B3, 71C1, 71D1, 71E1, 71F1 to 71F3, 71G1, 71H1 ... Connection part, 8 ... Stator, 80A to 80L ... Split core part, 232A, 232B ... Crossing line, 8001 ... 1st division core group, 8002 ... 2nd division core group, 72 ... Bus bar holding part, 72A ... Through hole, T1 to T6 ... External connection terminal, L1 ... 1st gap, L2 ... 2nd gap, L3 ... 3rd gap, L4 ... 4th gap, L5 ... 5th gap, L6 ... 6th Gap, L7 ... 7th gap, L8 ... 8th gap, CN1, CN11 ... 1st connection part, CN2, CN12 ... 2nd connection part, CL ... Central axis, 100 ... -Leader line positioning device, 110 ... inner positioning member, 120 ... outer positioning member, 130 ... insertion member, 131 ... rotating shaft

Claims (11)

A stator having a central axis extending in the vertical direction and a rotor that can rotate relative to the stator are provided.
The stator has a plurality of leader wires drawn from the coil in the axial direction at predetermined intervals in the circumferential direction.
The gaps formed between the leader lines adjacent to each other in the circumferential direction are one or a plurality of first gaps including a gap having the maximum circumferential width, and one or a plurality of gaps having a circumferential width smaller than the first gap. and the second gap, the possess,
The stator is configured by having 12 divided core portions having one tooth arranged in an annular shape in the circumferential direction.
In the pair of the divided core portions, one lead wire is wound around the divided core portion of one, and is wound around the divided core portion of the other through a crossover wire.
Three sets of the split core portions form six split core portions on one side.
In the six divided core portions on one side, two divided core portions of one of the other pair of the divided core portions are arranged between the pair of the divided core portions.
The leader line located at the circumferential end of the first divided core group composed of the six divided cores on one side and the second divided core composed of the six divided cores on the other side. The first gap is formed by the circumferential end of the group and the leader line located at the adjacent circumferential end.
The plurality of the coils constitute a first coil group and a second coil group.
The first coil group includes a plurality of first series connection configurations in which a plurality of the coils are connected in series.
The other ends of the plurality of first series connection configurations are each connected to the first neutral point to form a star connection.
The second coil group includes a plurality of second series connection configurations in which a plurality of the coils are connected in series.
The other ends of the plurality of second series connection configurations are each connected to the second neutral point to form a star connection.
motor. The motor according to claim 1, wherein the first gap is any one of two to four. The motor according to claim 2, wherein two of the first gaps are arranged point-symmetrically with respect to the central axis. A leader line support member having a plurality of holding portions for maintaining the posture of the leader line in a predetermined position is further provided.
The holding portions are arranged at predetermined intervals in the circumferential direction.
The gaps formed between the holding portions adjacent to each other in the circumferential direction are one or a plurality of third gaps including a gap having the maximum circumferential width, and one or a plurality of gaps having a circumferential width smaller than the third gap. Has a fourth gap,
The third gap is arranged so as to face the first gap in the axial direction.
The motor according to any one of claims 1 to 3, wherein the fourth gap is arranged so as to face the second gap in the axial direction. The leader line support member has a plurality of legs extending axially toward the stator at predetermined intervals in the circumferential direction.
The motor according to claim 4, wherein the legs are positioned so as to overlap with the second gap in the radial direction. A bearing holding member having a plurality of through holes through which the leader wire penetrates is further provided while holding the bearing portion.
The through holes are arranged at predetermined intervals in the circumferential direction.
The gaps formed between the through holes adjacent in the circumferential direction are one or a plurality of fifth gaps including a gap having the maximum circumferential width, and one or a plurality of gaps having a circumferential width smaller than the fifth gap. Has a sixth gap,
The fifth gap is arranged so as to face the first gap in the axial direction.
The motor according to any one of claims 1 to 5, wherein the sixth gap is arranged so as to face the second gap in the axial direction. Further comprising a bus bar unit having a bus bar having a plurality of connecting portions to which the leader line is connected and a bus bar holding portion for holding the bus bar.
The connecting portions are arranged at predetermined intervals in the circumferential direction.
The gaps formed between the connecting portions adjacent in the circumferential direction are one or a plurality of seventh gaps including the gap having the maximum circumferential width, and one or a plurality of gaps having a circumferential width smaller than the seventh gap. Has an eighth gap,
The seventh gap is arranged so as to face the first gap in the axial direction.
The motor according to any one of claims 1 to 6, wherein the eighth gap is arranged so as to face the second gap in the axial direction. The motor according to any one of claims 1 to 7, wherein the number of leader wires is the same as the number of coils included in the stator. The motor according to any one of claims 1 to 8, wherein the crossover is covered with an insulating tube. The motor according to any one of claims 1 to 9, wherein the leader wire is drawn from the inner diameter side of the stator. The motor according to any one of claims 1 to 10, wherein the rotor is located inside the stator in the radial direction.