JP2010239772A - Motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor in which a space required for disposing power supply members can be reduced even when a plurality of power supply members are used, and the same specifications can be used for the plurality of power supply members. <P>SOLUTION: Three power supply members 9 (first, second and third power supply members 9u, 9v and 9w) spirally extending toward the same direction of the circumferential direction while increasing diameter from the inside toward the outer circumferential side are used as a power supply member to which a coil end of the motor is connected, and the three power supply members 9 are disposed so as to be displaced in the circumferential direction. Further, the three power supply members 9 has the same specifications including the same length dimension. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a motor having a coil end connected to a power feeding member.

  In the motor, power supply to the coil is performed using a power supply member called a wiring pattern on the substrate or a bus bar. However, in order to improve the vibration resistance of the motor, it is preferable to employ a structure in which the coil end is connected to the power feeding member. As such a power supply member, one in which a single belt-like member is connected in an annular shape, a slit is provided in the long side portion of the belt-like member, and a part of the belt-like member is bent as a connection portion of a coil end has been proposed. (See Patent Document 1).

JP 2003-324883 A

  However, in the configuration described in Patent Document 1, since the power feeding member is annular, it is necessary to arrange a plurality of power feeding members in a concentric manner. Therefore, there is a problem in that an arrangement space for the power supply member becomes large if a certain interval is to be secured between the plurality of power supply members.

  In addition, the arrangement of a plurality of power supply members concentrically in a multiplexed manner uses a plurality of types of power supply members having different diameters, which increases the cost of manufacturing and managing parts.

  In view of the above problems, an object of the present invention is to provide a motor capable of narrowing a space necessary for arranging power feeding members even when a plurality of power feeding members are used.

  Moreover, the subject of this invention is providing the motor which can use the thing of the same specification for several electric power feeding member.

  In order to solve the above-described problem, the present invention includes a plurality of power supply members, an insulating power supply member holder that holds the plurality of power supply members, and a coil having a coil end connected to the power supply member. In the motor, the plurality of power supply members extend in a spiral shape in the same circumferential direction while increasing in diameter from the inner side toward the outer peripheral side.

  In the present invention, the power feeding member is spiral and not annular. For this reason, even when a plurality of power supply members are arranged, it is not necessary to arrange the power supply members in a concentric manner, so that a space required for arranging the power supply members can be reduced. Moreover, in this invention, since it is not necessary to arrange | position the several electric power feeding member concentrically and multiply, the thing of the same specification can be used as several power feeding members.

  In the present invention, it is preferable that the plurality of power supply members include arm portions for connecting coil ends that protrude outward in the radial direction at positions shifted from each other in the circumferential direction. According to such a configuration, the coil end can be connected to the power feeding member at a position shifted in the circumferential direction. For this reason, the space occupied by the power feeding member in the motor axial direction may be narrowed because the arm portions do not need to be overlapped in the motor axial direction.

  In the present invention, it is preferable that the plurality of power supply members are provided at positions where end portions located on the same side in the circumferential direction are shifted from each other in the circumferential direction. According to such a configuration, even when the arm portions for connecting the coil end portions are provided at the same position in the plurality of power feeding members, the arm portions for connecting the coil end portions are arranged at positions shifted from each other in the circumferential direction. It will be.

  In this case, it is preferable that the plurality of power supply members have the same length dimension. That is, since the thing of the same specification is used for several electric power feeding members, the cost required for manufacture and management of components can be reduced.

  In the present invention, the power supply member holder includes a plurality of power supply member storage grooves that respectively store the plurality of power supply members, and the power supply member storage grooves abut against at least one end of the power supply member and It is preferable that a positioning portion for positioning the power feeding member is formed. According to such a configuration, the power supply member can be disposed at a predetermined position on the power supply member holder, and the positional relationship between the plurality of power supply members can be set accurately.

  In the present invention, it is preferable that the power supply member constitutes a terminal to which power is supplied from the outside by bending an end located on the outer peripheral side. According to such a configuration, it is possible to configure a terminal for external power feeding without performing complicated processing or attachment of separate parts.

  In the present invention, the power feeding member is spiral and not annular. For this reason, even when a plurality of power supply members are arranged, it is not necessary to arrange the power supply members in a concentric manner, so that a space required for arranging the power supply members can be reduced. Moreover, in this invention, since it is not necessary to arrange | position the several electric power feeding member concentrically and multiply, the thing of the same specification can be used as several power feeding members.

It is a longitudinal cross-sectional view of the motor to which this invention is applied. It is explanatory drawing of the electric power feeding member used for the motor to which this invention is applied. It is explanatory drawing which expands and shows the electric power feeding member used for the motor to which this invention is applied. It is explanatory drawing which shows an example of the manufacturing method of the electric power feeding member to which this invention is applied.

  An inner rotor type motor will be described below as a motor to which the present invention is applied with reference to the drawings.

(General configuration of motor)
FIG. 1 is a longitudinal sectional view of a motor to which the present invention is applied. In FIG. 1, the motor 1 of this embodiment is a three-phase inner rotor type DC brushless motor, and has a bottomed cylindrical motor case 2 with one end in the motor axial direction L being an open end, and a motor case 2. A rotor including an annular stator 4 fixed to the inner peripheral surface of the rotor, a rotating shaft 70 extending in the motor axial direction L inside the stator 4, and a rotor magnet 71 fixed to the outer peripheral surface of the rotating shaft 70 7. The rotating shaft 70 is rotatably supported by the first bearing 36 and the second bearing 37. The first bearing 36 is held by a bearing holder 31 held by the motor case 2, and the second bearing 37 is held by a small diameter portion 26 formed at the bottom of the motor case 2. In this embodiment, the bearing holder 31 is used as a lid member that closes the open end of the motor case 2. The stator 4 includes a stator core 5 composed of a split core, insulators 51 and 52 covering both ends of the split core, and a plurality of three-phase portions wound around the salient poles of the stator core 5 through the grooves of the insulators 51 and 52. And a coil 6.

  In the motor 1 having such a configuration, when power is supplied to the plurality of coils 6 from the coil ends, in this embodiment, the power supply member holder 8 made of a disk-shaped resin molded product and the power supply held by the power supply member holder 8 are used. A member 9 is used.

(Configuration of power supply member holder 8)
FIG. 2 is an explanatory view of the power supply member 9 used in the motor 1 to which the present invention is applied. FIGS. 2 (a) and 2 (b) each show a state in which the power supply member 9 is held by the power supply member holder 8. It is explanatory drawing and explanatory drawing which abbreviate | omits and shows the electric power feeding member holder.

  As shown in FIG. 2A, the power supply member holder 8 has an annular shape as a whole, and a circular hole 80 that penetrates the rotating shaft 70 is formed at the center thereof. On the upper surface of the power supply member holder 8, around the hole 80, three power supply member accommodation grooves 86 u that spirally extend in the same circumferential direction while expanding from the inner side toward the outer peripheral side, 86v and 86w are formed. Each of the power supply member receiving grooves 86 u, 86 v, 86 w includes inner peripheral end portions 861 u, 861 v, 861 w in the vicinity of the hole 80 that penetrates the rotating shaft 70, and the outer peripheral end portion 862 u in the vicinity of the outer peripheral edge of the power supply member holder 8. , 862v, 862w. The circumferential lengths of the power supply member receiving grooves 86u, 86v, 86w are the same, and the power supply member receiving grooves 86u, 86v, 86w are formed rotationally symmetrically at positions shifted from each other by an equal angle in the circumferential direction. In this embodiment, the power supply member accommodation grooves 86u, 86v, 86w are formed at positions where the end portions located on the same side in the circumferential direction are shifted by about 90 ° with the hole 80 as the center. Further, the power supply member accommodation grooves 86u, 86v, 86w are formed in an angle range of about 270 ° with the hole 80 as the center. For this reason, around the hole 80, there are a region where the power supply member receiving grooves 86u, 86v, 86w are doubled and a region where the power supply member receiving grooves 86u, 86v, 86w are tripled. The portion where the vicinity of the inner end 861u of the power supply member receiving groove 86u and the vicinity of the outer end 862w of the power supply member receiving groove 86w are opposed in the radial direction is a power supply member receiving groove as compared with other regions. The distance between is wide.

  In addition, on the upper surface of the power supply member holder 8, arm portion storage grooves 866u, 866v, and 866w are formed from the vicinity of the inner peripheral side ends 861u, 861v, and 861w of the power supply member storage grooves 86u, 86v, and 86w outward in the radial direction. Arm portion receiving grooves 867u, 867v, 867w are formed from the vicinity of the center in the circumferential direction of the power supply member receiving grooves 86u, 86v, 86w to the outer side in the radial direction, and the outer peripheral side ends of the power supply member receiving grooves 86u, 86v, 86w Arm portion receiving grooves 868u, 868v, and 868w are formed from the vicinity of the portions 862u, 862v, and 862w toward the outside in the radial direction. The arm receiving grooves 866u, 866v and 866w, the arm receiving grooves 867u, 867v and 867w, and the nine arm receiving grooves 868u, 868v and 868w are formed at substantially equal angular intervals to supply power. The arm portion accommodating groove extending from the member accommodating groove 86u, the arm portion accommodating groove extending from the power feeding member accommodating groove 86v, and the arm portion accommodating groove extending from the power feeding member accommodating groove 86w are arranged in this order.

The lengths of the arm receiving grooves 866u, 866v, 866w, the arm receiving grooves 867u, 867v, 867w, and the arm receiving grooves 868u, 868v, 868w are as follows: Arm receiving grooves 866u, 866v, 866w
> Arm housing grooves 867u, 867v, 867w
> Arm storing groove 868u, 868v, 868w
It has become.

  In addition, on the upper surface of the power supply member holder 8, a total of nine notches 82 are formed at equal angles on the outer peripheral side of the formation region of the power supply member accommodation grooves 86u, 86v, 86w. The notches 82 are connected to the arm receiving grooves 866u, 866v, 866w, the arm receiving grooves 867u, 867v, 867w, and the arm receiving grooves 868u, 868v, 868w.

(Configuration of power supply member holder 8 and power supply member 9)
FIG. 3 is an explanatory diagram showing, in an enlarged manner, a power supply member used in a motor to which the present invention is applied. FIGS. It is a perspective view which expands and shows the figure and the edge part of the electric power feeding member 9. FIG.

  As shown in FIGS. 2A and 2B and FIGS. 3A and 3B, in the power supply member holder 8, the three power supply member receiving grooves 86u, 86v, 86w The power supply member 9u, the second power supply member 9v, and the third power supply member 9w) are mounted, and the power supply member 9 (the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w) is also included in the power supply member accommodation groove. Like 86u, 86v, and 86w, they extend spirally in the same circumferential direction while expanding from the inner side toward the outer peripheral side. The power supply member 9 (the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w) is made of a metal plate such as a copper plate and is used for W-phase, V-phase, and U-phase power supply.

  In the present embodiment, the power supply members 9 (the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w) are respectively located on the inner peripheral side end portions 91u, 91v, 9w in the vicinity of the hole 80 that penetrates the rotating shaft 70. The outer peripheral side end portions 92u, 92v, 92w are provided in the vicinity of the outer peripheral edge of the power supply member holder 8. The circumferential lengths of the first feeding member 9u, the second feeding member 9v, and the third feeding member 9w are the same, and the first feeding member 9u, the second feeding member 9v, and the third feeding member 9w are equiangular in the circumferential direction. They are arranged rotationally symmetrically at positions shifted by the same amount. In this embodiment, the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w are arranged at positions where the end portions located on the same side in the circumferential direction with the hole 80 as the center are shifted by about 90 °. Yes. Further, the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w are disposed in an angle range of about 270 ° with the hole 80 as the center.

  Here, the power supply member 9 (the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w) has substantially the same circumference in the three power supply member accommodation grooves 86u, 86v, 86w. For this reason, the inner walls of the inner peripheral side ends 861u, 861v, 861w of the power supply member receiving grooves 86u, 86v, 86w are the positioning portions 88u, 88v, 88w, and the power supply member 9 (first power supply member 9u, second power supply member). 9v and the inner peripheral side end portions 91u, 91v, 91w of the third power feeding member 9w). Further, the inner walls of the outer peripheral side ends 862u, 862v, 862w of the power supply member receiving grooves 86u, 86v, 86w are the positioning portions 89u, 89v, 89w, and are used as the power supply member 9 (first power supply member 9u, second power supply member 9v, And the third power feeding member 9w) abuts on the outer peripheral side end portions 92u, 92v, 92w. Accordingly, the power supply member 9 (the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w) is accommodated in a state of being positioned in the power supply member accommodation grooves 86u, 86v, 86w.

In the power supply member 9 (the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w), the U-shaped arm portion 96u extends radially outward from the inner peripheral side end portions 91u, 91v, 91w. , 96v, 96w, and the arm portions 96u, 96v, 96w are fitted into the arm portion receiving grooves 866u, 866v, 866w and reach the notch 82. Further, in the power supply member 9 (the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w), U-shaped arms 97u, 97v, 97w from the vicinity of the center in the circumferential direction toward the outer side in the radial direction. The arm portions 97u, 97v, and 97w are fitted into the arm portion receiving grooves 867u, 867v, and 867w and reach the notches 82. Further, in the power supply member 9 (the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w), the U-shaped arm portion 98u from the outer peripheral side end portions 92u, 92v, and 92w toward the radially outer side. 98v, 98w extend, and these arm portions 98u, 98v, 98w reach the notches 82 by fitting into the arm portion receiving grooves 868u, 868v, 868w. Therefore, the length dimensions of the arm portions 96u, 96v, 96w, the arm portions 97u, 97v, 97w, and the arm portions 98u, 98v, 98w are as follows. Arm portions 96u, 96v, 96w
> Arms 97u, 97v, 97w
> Arms 98u, 98v, 98w
It has become.

  The arm portions 96u, 96v, 96w, 97u, 97v, 97w, 98u, 98v, and 98w are terminal portions for connection at the ends of the coil 6, and are shifted from each other in the circumferential direction. Therefore, any of the arm portions 96u, 96v, 96w, 97u, 97v, 97w, 98u, 98v, and 98w need not be stacked in the motor axial direction L, so that the power feeding member 9 is in the motor axial direction L. The occupied space may be narrow.

  Arms 96u, 96v, 96w, 97u, 97v, 97w, 98u, 98v, 98w are U-shaped, and after inserting the coil terminal inside, it is crimped, and the coil terminal and the power supply member 9 (first The power supply member 9u, the second power supply member 9v, and the third power supply member 9w) are connected.

  Further, the outer peripheral side end portions 92u, 92v, 92w of the power supply member 9 (the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w) are bent in the motor axial direction to be a terminal 99u for external connection. 99v, 99w. Therefore, the coil 6 can be energized by connecting a wiring member to the terminals 99u, 99v, 99w and energizing the U-phase, V-phase, and W-phase from the outside.

  The power supply member 9 (the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w) having such a configuration is, for example, the arm portions 96u, 96v, 96w, 97u, 97v, 97w, 98u, 98v, and 98w. After creating a metal plate in which the corresponding protrusions are formed integrally with the belt-shaped main body portion, the protrusions are bent in the plate thickness direction of the power supply member 9 so that the arms 96u, 96v, 96w, 97u, 97v, 97w, 98u, 98v, and 98w are comprised, and it can manufacture by curving a strip | belt-shaped main-body part. For this reason, in the power supply member 9 (the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w), the power supply member receiving grooves 86u and 86v in a state where the belt-like main body portion extending with a constant width is curved. 86w, and a protrusion corresponding to the arm portions 96u, 96v, 96w, 97u, 97v, 97w, 98u, 98v, 98w is bent radially outward from one side edge of the band-shaped main body portion. It has become. According to such a configuration, the arm portions 96u, 96v, 96w, 97u, 97v, and the like are simply bent in the plate thickness direction at the side edge of the band-shaped main body portion so as to extend on both sides along the longitudinal direction of the band-shaped main body portion. 97w, 98u, 98v, 98w can be formed. Therefore, when the metal piece forming the power supply member 9 is removed from the metal plate, no useless portions are generated, and the arms 96u, 96v, 96w, 97u, 97v, 97w, 98u, 98v, and 98w are formed. Can be easily bent.

  The power supply member 9 (the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w) has arm portions 96u, 96v, 96w, 97u, 97v, and 97w on a belt-like main body portion that extends linearly. , 98 u, 98 v, 98 w can be manufactured by fixing the parts by welding or the like and curving the band-shaped part.

(Main effects of this form)
As described above, in the present embodiment, the plurality of power supply members 9 (the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w) are spiral and not annular. For this reason, even when a plurality of power supply members 9 are arranged, it is not necessary to arrange the power supply members 9 concentrically, so that a space necessary for arranging the power supply members 9 is reduced. Further, in this embodiment, since it is not necessary to arrange a plurality of power supply members 9 concentrically in a multiple manner, the lengths of the plurality of power supply members 9 can be the same. Can be used. Therefore, it is possible to reduce the cost required for manufacturing and managing the parts.

  The plurality of power supply members 9 are coil end connecting arms 96u, 96v, 96w, 97u, 97v, 97w, 98u, 98v, 98w that protrude outward in the radial direction at positions shifted from each other in the circumferential direction. Therefore, the coil end can be connected to the power supply member 9 at a position shifted in the circumferential direction. For this reason, since the arm portions 96u, 96v, 96w, 97u, 97v, 97w, 98u, 98v, and 98w are provided, it is not necessary to overlap the motor axial direction L so that the power supply member 9 is in the motor axial direction L. The space occupied by can be small. Further, the plurality of power supply members 9 are provided at positions shifted from each other in the circumferential direction. Therefore, even when the arm portions 96u, 96v, 96w, 97u, 97v, 97w, 98u, 98v, and 98w for connecting the coil end are provided at the same position in the plurality of power supply members 9, the coil end connecting The arm portions 96u, 96v, 96w, 97u, 97v, 97w, 98u, 98v, and 98w are arranged at positions shifted from each other in the circumferential direction.

  The power supply member holder 8 includes positioning portions 88 u, 88 v, 88 w, 89 u, 89 v, 89 w that contact the end of the power supply member 9 to position the power supply member 9. The power supply member 9 can be arranged at a predetermined position, and the positional relationship between the plurality of power supply members 9 can be set accurately. In addition, about the electric power feeding member holder 8, you may employ | adopt the structure which formed only one of positioning part 88u, 88v, 88w and positioning part 89u, 89v, 89w.

  Further, in the power supply member 9 (the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w), by bending the outer peripheral side end portions 92u, 92v, and 92w, a terminal 99u for power supply from the outside, Since 99v and 99w are configured, the terminals 99u, 99v, and 99w can be configured without performing complicated processing or attachment of separate parts.

(Other embodiments)
In manufacturing the power supply member 9 (the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w) used in the above embodiment, the belt-shaped member extending linearly may be curved. However, as shown in FIG. 4, the power supply member 9 may be formed in a curved shape from a single metal plate by pressing. Even in such a configuration, it is possible to manufacture the power supply member 9 used as the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w with a single punch. At this time, if the projections 95 are formed at positions where the arm portions 96u, 96v, 96w, 97u, 97v, 97w, 98u, 98v, 98w are provided, the arm portions 96u, 96v, 96w, 97u, 97v, 97w, 98u , 98v and 98w are convenient for fixing the parts by welding or the like.

  In the above embodiment, the three power supply members 9 (the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w) all have the same length, but the three power supply members 9 (first A configuration in which the lengths of the first power supply member 9u, the second power supply member 9v, and the third power supply member 9w) are different from each other may be employed.

  In the above embodiment, the power supply member receiving grooves 86u, 86v, 86w and the power supply member 9 are provided over an angle range of about 270 ° at a position shifted by about 90 ° about the hole 80. , 86v, 86w and the angular position and angle range of the power feeding member 9 may be conditions other than the above angles.

  In the above embodiment, the three power supply members 9 are used. However, the present invention may be applied to a case where a total of four power supply members are used including a common power supply member.

DESCRIPTION OF SYMBOLS 1 Motor 5 Stator core 6 Coil 7 Rotor 8 Feed member holder 9, 9u, 9v, 9w Feed member 86u, 86v, 86w Feed member accommodation groove 96u-w, 97u-w, 98u-w Arm part 99u for coil edge part connection ~ W External power supply terminal

Claims (6)

In a motor having a plurality of power supply members, an insulating power supply member holder that holds the plurality of power supply members, and a coil having a coil end connected to the power supply member,
The motor is characterized in that the plurality of power supply members extend spirally in the same circumferential direction while increasing in diameter from the inner side toward the outer peripheral side.   2. The motor according to claim 1, wherein the plurality of power supply members include arm portions for connecting coil end portions that protrude outward in the radial direction at positions shifted from each other in the circumferential direction.   The motor according to claim 2, wherein the plurality of power feeding members are provided at positions where end portions located on the same side in the circumferential direction are shifted from each other in the circumferential direction.   4. The motor according to claim 1, wherein the plurality of power supply members have the same length dimension. 5. The power supply member holder includes a plurality of power supply member accommodation grooves that respectively accommodate the plurality of power supply members,
5. The power feeding member receiving groove includes a positioning portion that contacts at least one end of the power feeding member and positions the power feeding member. 6. The motor described.   The motor according to any one of claims 1 to 5, wherein the power supply member constitutes a terminal to which power is supplied from the outside by bending an end portion located on an outer peripheral side.

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