JPWO2018043364A1 - Winding fixed structure and motor - Google Patents

Abstract

An insulator provided on a stator core disposed on the outer peripheral side of a cylindrical rotor rotating about an axis of rotation, and a plate-like terminal block (5) for fixing an end of a winding wound on the insulator And the terminal block includes a projection (19, 20) projecting toward the insulator on one surface of the plate, and a terminal block side engaging portion engaged with the insulator at the tip of the projection. (24, 25), the insulator includes a plurality of insulating members connected in the circumferential direction and covering the stator core, and an insulating member side engaging portion engaged with the terminal block side engaging portion by the insulating members .

Description

  The present invention relates to a winding fixing structure and an electric motor.

  For example, as an electric motor provided in a fan, etc., the end of the wound winding inside the electric motor is tied to a terminal pin provided on the insulator, and then engaged with the terminal block from the top surface direction of the insulator It is known to fix the platform. In this case, the insulator and the terminal block need to be provided with engaging portions.

  Therefore, in the related art, a terminal hole is provided with a terminal hole for inserting a terminal pin, and a terminal pin provided on an insulator is inserted into the terminal hole and soldered to hold the terminal block (see FIG. For example, refer to Patent Document 1).

  Hereinafter, the motor will be described with reference to FIG.

  FIG. 9 is a cross-sectional view showing a conventional motor. The motor 100 is formed of a housing 101, a stator core 102, an insulator 103, a terminal block 107, a shaft 109, and a terminal pin 121. The terminal pin 121 inserted into the insulator 103 passes through the terminal hole for inserting the terminal pin 121 provided on the terminal block 107, and is soldered to hold the insulator 103 and the terminal block 107 engaged with each other. There is. Thus, the terminal block can be attached to the inside of the motor 100.

JP 2005-287127 A

  In such a conventional electric motor, the integrally formed insulator is provided with a mechanism that engages with the terminal block. On the other hand, in recent years, there have been increasing cases in which the insulator is constituted by a plurality of divided members and a mechanism for engaging with the terminal block is provided only in a part of the plurality of members. In such a case, a plurality of molds are required to manufacture insulators of a plurality of shapes, leading to an increase in cost. Moreover, when the shape of an insulator was made the same, another member for engaging an insulator and a terminal block was needed.

  The present invention solves such conventional problems, can simplify the insulator with the same shape, and can improve the versatility of the insulator and reduce the cost of the mold, and a winding fixing structure and the same To provide an electric motor having the

  And in order to achieve this object, the winding fixed structure according to the present invention is wound on an insulator provided on a stator core disposed on the outer peripheral side of a cylindrical rotor rotating about an axis of rotation, and the insulator In a winding fixing structure including a terminal block for fixing an end of a mounted winding, the terminal block includes a projection projecting toward the insulator on one surface of a plate and a tip of the projection. And a terminal block side engaging portion engaged with the insulator. Further, the insulator is provided with a plurality of insulating members connected in the circumferential direction to cover the stator core, and an insulating member side engaging portion engaged with the terminal block side engaging portion by the insulating member. In this way, the intended purpose is achieved.

  According to the present invention, it is possible to provide a winding fixing structure capable of improving the versatility of the insulator and reducing the mold cost, and an electric motor including the same.

FIG. 1 is a cross-sectional view showing a motor according to Embodiments 1, 2, and 3 of the present invention. 2A is a plan view of the insulating member of the motor according to Embodiment 1. FIG. FIG. 2B is a cross-sectional view taken along line 2B-2B of FIG. 2A. FIG. 3 is a perspective view of the terminal block of the motor according to the first embodiment. FIG. 4A is a perspective view when the terminal block and the insulator of the motor according to the first embodiment are engaged. FIG. 4B is a perspective view in which the insulator 3 and the terminal block 5 of the motor 1 according to Embodiment 1 are engaged. FIG. 5 is a simplified view showing the shape and positional relationship of the outer peripheral engagement portion, the inner peripheral engagement portion, the sandwiching portion, the inner peripheral wall and the outer peripheral wall in the terminal block and insulator of the motor according to the first embodiment. FIG. 6 is a simplified view showing an enlarged view of a gap generated between the bottom surface of the terminal block of the motor according to the first embodiment and the opening surface of the terminal pin insertion hole. FIG. 7 is a cross-sectional view showing a simplified positional relationship when the terminal block and the insulator of the motor according to the modification are engaged. FIG. 8 is a cross-sectional view showing a simple positional relationship when the terminal block and the insulator of the motor according to the modification are engaged. FIG. 9 is a cross-sectional view showing a conventional motor.

  In the winding fixing structure according to the present invention, an insulator provided on a stator core disposed on the outer peripheral side of a cylindrical rotor rotating around an axis of rotation and an end of a winding wound on the insulator are fixed In the winding fixing structure provided with the terminal block, the terminal block is provided with a projecting portion projecting toward the insulator on one surface of the plate and a terminal block side engagement engaged with the insulator at the tip of the projecting portion And a unit. Further, the insulator is configured to include a plurality of insulating members connected in the circumferential direction to cover the stator core, and an insulating member side engaging portion engaged with the terminal block side engaging portion by the insulating member.

  Thus, by providing the projecting portion on the terminal block side, it is possible to improve the versatility of the insulator and to reduce the cost of the mold. Furthermore, the insulator and the terminal block are provided with engaging portions that engage with each other. Therefore, the insulator and the terminal block can be engaged without using an additional member.

  The insulating member also includes an inner peripheral wall corresponding to the inner periphery of the stator core and an outer peripheral wall corresponding to the outer periphery of the stator core. Further, the projecting portion includes an inner circumferential side projecting portion corresponding to the inner circumferential wall and an outer circumferential side projecting portion corresponding to the outer circumferential wall. The inner peripheral side projecting portion has a terminal block inner peripheral side engaging portion engaged with the inner peripheral wall at the tip. The terminal block inner peripheral side engaging portion is an engaging claw that biases the inner peripheral wall from the outer peripheral side to the inner peripheral side at the tip of the inner peripheral side protruding portion. And as for the terminal block, the inner peripheral side end part is located outside the same or inner peripheral wall as the inner peripheral wall.

  As a result, when a stress is applied from the outer periphery of the stator core to the inner peripheral direction to the terminal block, the shift of the terminal block can be suppressed.

  And the space which inserts a rotor in a stator core is secured. That is, it is possible to easily insert the rotor without impairing the insertability of the rotor.

  In addition, the terminal block may be provided with a pinching portion that pinches the outer peripheral wall between the outer peripheral side protruding portion and the inner peripheral side of the outer peripheral side protruding portion.

  As a result, when a force is applied to the terminal block radially outward of the stator core, the peripheral wall can be held between the peripheral projection and the sandwiching portion to suppress the displacement of the terminal block. Play.

  In addition, the pinching portion includes a pinching engagement portion that engages with the outer peripheral wall at the tip. The sandwiching engagement portion is an engagement claw which biases the outer peripheral wall from the inner peripheral side to the outer peripheral side at the tip of the sandwiching portion.

  As a result, when a stress is applied from the outer periphery of the stator core to the inner peripheral direction to the terminal block, the effect of suppressing the displacement of the terminal block can be achieved.

  In addition, the outer peripheral side projecting portion is provided with a terminal stand outer peripheral side engaging portion that engages with the outer peripheral wall at the tip. The terminal stand outer peripheral side engaging portion is an engaging claw which biases the outer peripheral wall from the outer peripheral side to the inner peripheral side at the tip of the outer peripheral side protruding portion.

  As a result, when a stress is applied from the outer periphery of the stator core to the inner peripheral direction to the terminal block, the effect of suppressing the displacement of the terminal block can be achieved.

  Further, the terminal block includes a plate-like support projecting toward the insulator on the same circumference as the inner circumferential side protrusion, and the plate-like support is a terminal of the inner circumferential wall over at least two adjacent inner circumferential walls It may be in contact with the top of the pedestal.

  As a result, when the terminal block and the insulator are engaged and after the engagement, it is possible to suppress the misalignment between the insulator and the stator core in the axial direction.

  In addition, the terminal block includes a plate-like support projecting toward the insulator on the same circumference as the outer circumferential side protrusion, and the plate-like support is a terminal stand of the outer circumferential wall over at least two adjacent outer circumferential walls It may be in contact with the side top.

  As a result, when the terminal block and the insulator are engaged and after the engagement, it is possible to suppress the misalignment between the insulator and the stator in the axial direction.

  In addition, the length of the protrusion in the rotational axis direction is determined between the terminal block side end face of the insertion hole into which the terminal pin provided on the insulator is inserted and the terminal hole into which the terminal pin provided on the terminal block is inserted The axial width of the gap may be greater than the diameter of the winding.

  Thus, when the terminal block and the insulator are engaged, a gap between the terminal block side end face of the insertion hole into which the terminal pin provided on the insulator is inserted and the terminal hole into which the terminal pin provided on the terminal block is wound Since the diameter of the wire is larger than the diameter of the wire, the contact between the wire and the terminal block does not occur, and the disconnection failure of the wire due to the pressure of the terminal block and the insulator can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.

  Moreover, the same reference numerals are given to the same parts throughout the drawings, and the description is omitted. Furthermore, in the drawings, the description of the details of each part not directly related to the present invention is omitted.

Embodiment 1
FIG. 1 is a cross-sectional view showing a motor 1 according to Embodiment 1 of the present invention. FIG. 2A is a plan view of the insulating member 33a of the motor 1 according to the first embodiment. FIG. 2B is a cross-sectional view taken along line 2B-2B of FIG. 2A. FIG. 3 is a perspective view of the terminal block 5 of the motor 1 according to the first embodiment.

  Hereinafter, the internal configuration of the motor 1 according to the present embodiment will be described with reference to FIGS. 1 to 3.

  The motor 1 is an internal rotation type AC motor, and is used, for example, as a drive source of a fan. The motor 1 includes a rotor 6 (rotor), a stator 2 and a shaft 9 (rotational axis). The rotor 6 and the stator 2 are covered with a housing 7a and a housing 7b. That is, the housing 7 a and the housing 7 b constitute the outer shell of the motor 1.

  Next, each component will be sequentially described.

  The rotor 6 is one in which an aluminum alloy is poured into the rotor core and solidified. The rotor 6 has a cylindrical shape, and is fixed to a shaft 9 penetrating the top surface (upper side in FIG. 1) and the bottom surface (lower side in FIG. 1) in the cylindrical shape.

  The shaft 9 has a cylindrical rod shape, and a bearing 10 a is inserted on the top surface side of the rotor 6 and a bearing 10 b is inserted on the bottom surface side.

  The bearing 10a and the bearing 10b can rotate the inner ring and the outer ring independently of each other between the inner ring, which is a cylindrical ring, a cylindrical ring having a larger diameter than the inner ring, and the inner ring and the outer ring. And a plurality of rolling elements for holding the The bearing 10a is fixed to the outer ring on the bottom surface (upper side in FIG. 1) of the housing 7a, and the bearing 10b is fixed to the outer ring on the bottom surface (lower side in FIG. 1) of the housing 7b. The inner rings of the bearing 10a and the bearing 10b are fixed to the shaft 9, respectively.

  The stator 2 has a cylindrical shape, and includes a stator core 15 (stator core), an insulator 3, a winding 4 and a terminal block 5.

  The stator core 15 has a cylindrical shape configured by laminating donut-shaped iron plates. The rotor 6 is located in the central cylindrical space, ie the bore. That is, the shaft 9 connected to the rotor 6 becomes a rotation axis, and the rotor 6 rotates. The stator core 15 has a plurality of slots penetrating from the top surface to the bottom surface, that is, a plurality of spaces for winding windings.

  The insulator 3 is a resin-molded insulator, and is inserted into the slot of the stator core 15 from the axial direction. The insulator 3 is composed of an insulator 3a on the top surface side (upper side in FIG. 1) and an insulator 3b on the bottom surface side (lower side in FIG. 1). That is, the insulators 3a and 3b are inserted into the cylindrical stator core 15 so as to face the top and bottom surfaces respectively. The insulator 3a is formed by connecting a plurality of insulating members 33a shown in FIGS. 2A and 2B, and connecting the insulating members 33a in the circumferential direction of the stator core 15 forms a cylindrical insulator 3a. Similarly, the insulator 3 b is formed by connecting the insulating member 33 b in the circumferential direction of the stator core 15. By inserting cylindrical insulators 3a and 3b circumferentially connected from the top and bottom surfaces of the stator core 15, the slots provided in the stator core 15 can be covered with the insulating members 33a and 33b. Here, the insulating members 33a connected and inserted from the top surface side all have the same shape. Similarly, the insulating members 33b connected and inserted from the bottom side all have the same shape. The insulating members 33a and 33b may have the same shape.

  As shown in FIGS. 2A and 2B, the insulating member 33 a includes an inner peripheral wall 13 corresponding to the inner periphery of the stator core 15 and an outer peripheral wall 14 corresponding to the outer periphery of the stator core 15. The inner peripheral wall 13 corresponds to the inner periphery of the stator core 15. That is, when the insulating member 33a is inserted into the stator core 15, the inner peripheral wall 13 is inserted along the inner peripheral surface of the stator core 15. Say that. The outer peripheral wall 14 corresponds to the outer periphery of the stator core 15. That is, when the insulating member 33a is inserted into the stator core, the outer peripheral wall 14 is inserted along the outer peripheral surface of the stator core 15. say. Further, the insulating member 33 a is provided with the inner peripheral side engaging portion 16 on the inner peripheral wall 13 and the outer peripheral side engaging portion 17 on the outer peripheral wall 14 in order to engage and hold the terminal block 5. Here, the insulating member side engaging portion 34 is configured by the inner peripheral side engaging portion 16 and the outer peripheral side engaging portion 17. Furthermore, the insulating member 33 a is provided with the terminal block side top 27 on the inner peripheral wall 13. The terminal block side top 27 is the highest position on the terminal block 5 side of the inner peripheral wall 13. The details of each engaging portion will be described later.

  The cylindrical insulator 3a is formed by connecting the plurality of insulating members 33a in the circumferential direction. Then, the insulator 3a is inserted from the top side into the slots formed in the stator core 15 at equal intervals in the circumferential direction. Further, the cylindrical insulator 3b is formed by connecting the plurality of insulating members 33b in the circumferential direction. Then, the insulator 3 b is inserted from the bottom side into the circumferential slots formed in the stator core 15. Thus, the insulator 3a and the insulator 3b inserted in each slot in the vertical direction (axial direction) are connected to each other to form the insulator 3. In addition, a terminal pin insertion hole 12 for mounting the terminal pin 11 is provided on the top surface side of the insulating member 33a, and the terminal pin 11 is inserted from above the insulating member 33a. The terminal pin 11 is tangled with the end of the winding 4 wound around the insulator 3. In addition, above means the upper part of the cross-sectional view of FIG. 2B, and indicates the same direction as the top surface side.

  The winding 4 is a copper wire coated with an insulating film, and is wound on the insulator 3 inserted in the slot of the stator core 15 so as not to be in contact with the stator core 15.

  The terminal block 5 is a resin-molded plate-like insulator, and is provided, for example, on the top surface side of the stator core 15, that is, on the insulator 3a side. As shown in FIG. 3, the terminal block 5 includes a plurality of terminal holes 18 through which the terminal pins 11 can pass.

  The terminal block 5 is provided with an inner peripheral side projecting portion 19 and an outer peripheral side projecting portion 20 on one surface of a plate shape in order to engage and hold the insulator 3a. The inner peripheral side protrusion 19 corresponds to the inner peripheral wall 13, and the outer peripheral side protrusion 20 corresponds to the outer peripheral wall 14. Here, that the inner peripheral side protrusion 19 corresponds to the inner peripheral wall 13 means that the inner peripheral side protrusion 19 protrudes toward the inner peripheral wall 13. Further, “the outer peripheral side protruding portion 20 corresponds to the outer peripheral wall 14” means that the outer peripheral side protruding portion 20 protrudes toward the outer peripheral wall 14. And the inner peripheral side protrusion part 19 is equipped with the terminal block inner peripheral side engaging part 24 engaged with the inner peripheral wall 13 in a front-end | tip. In addition, the outer peripheral side protruding portion 20 is provided with a terminal stand outer peripheral side engaging portion 25 that engages with the outer peripheral wall 14 at the tip. Here, the terminal block side engaging portion 35 is configured by the terminal block inner circumferential side engaging portion 24 and the terminal block outer circumferential side engaging portion 25. Then, the terminal block 5 is on the outer peripheral side of the inner peripheral side protruding portion 19 and on the inner peripheral side of the outer peripheral side protruding portion 20, the clamping portion 21 for holding the outer peripheral wall 14 with the outer peripheral side protruding portion 20 when installed. Have.

  Further, the terminal block 5 is provided with a plate-like support portion 22 projecting toward the insulator 3 on the side of the inner peripheral wall 13 at the time of installation. The insulator 3 having these engaging shapes and the terminal block 5 constitute a winding fixing structure.

  Subsequently, the details of each component and the positional relationship between the components when the insulator 3 a and the terminal block 5 are engaged will be described with reference to FIGS. 2A to 6.

  4A is a perspective view when the insulator 3 and the terminal block 5 of the motor 1 according to Embodiment 1 are engaged. FIG. 4B is a perspective view in which the insulator 3 and the terminal block 5 of the motor 1 according to Embodiment 1 are engaged. As shown to FIG. 4A and FIG. 4B, the terminal block 5 is inserted in the insulator 3 from the top | upper surface side, and the terminal block 5 and the insulator 3 engage. In addition, in FIG. 4A and FIG. 4B, the winding 4 and the rotor 6 are abbreviate | omitted for simplification. FIG. 5 is a cross-sectional view showing a simple positional relationship when the terminal block 5 and the insulator 3 of the electric motor 1 according to the first embodiment are engaged.

  As shown in FIG. 5, on the inner circumferential side, the inner circumferential side engaging portion 16 provided on the inner circumferential wall 13 and the terminal block inner circumferential side engaging portion 24 are engaged. In other words, the inner peripheral wall 13 and the terminal block inner peripheral side engaging portion are engaged.

  The inner peripheral side engaging portion 16 is a hole formed on the inner peripheral wall 13 of the insulating material 33 a and penetrating the inner peripheral wall 13 in the radial direction. In addition, in this Embodiment, although the inner peripheral side engaging part 16 is a through-hole, it is not necessary to penetrate.

  As shown in FIG. 5, the inner peripheral side protrusion 19 is a support post that protrudes downward corresponding to the inner peripheral wall 13 from the bottom surface on the inner peripheral side end of the terminal block 5. Further, the inner peripheral side protrusion 19 is located outside the inner periphery of the stator core 15. A claw-shaped terminal block inner peripheral engagement portion 24 is provided at the tip of the inner peripheral protrusion 19. Here, the tip means the vicinity of the tip portion of the inner peripheral side protrusion 19. Therefore, the terminal block inner peripheral side engaging portion 24 does not necessarily have to be provided at the tip of the inner peripheral side protruding portion 19.

  The terminal block inner peripheral side engaging portion 24 is an engaging claw that protrudes in one direction as a specific shape. Further, the tip of the engaging claw which is the terminal block inner peripheral side engaging portion 24 is directed in the direction of the shaft 9. The tip end of the engagement claw is inserted from the outer peripheral side of the inner peripheral side engaging portion 16 so that the inner peripheral side engaging portion 16 and the terminal block inner peripheral side engaging portion 24 are engaged. That is, the inner peripheral side of the terminal block 5 is engaged with and held by the inner peripheral wall 13 of the insulator 3. Furthermore, it can be said that the terminal block inner peripheral side engaging portion 24 is an engaging claw that biases the inner peripheral wall 13 from the outer peripheral side to the inner peripheral side.

  Further, on the outer peripheral side, the outer peripheral engagement portion 17 provided on the outer peripheral wall 14 and the terminal stand outer peripheral engagement portion 25 are engaged. In other words, the outer peripheral wall 14 and the terminal block outer peripheral side engaging portion 25 are engaged. Further, the outer peripheral wall 14 is held between the outer peripheral side projecting portion 20 and the holding portion 21. The following will be described in order.

  The outer peripheral side engaging portion 17 is formed on the outer peripheral wall 14 of the insulating material 33a, and has a concave shape with an opening directed in the outer peripheral direction.

  As shown in FIG. 5, the outer peripheral side protruding portion 20 is a post projecting downward from the outer peripheral end of the terminal block 5 in correspondence with the outer peripheral wall 14.

  A claw-shaped terminal block outer peripheral side engaging portion 25 is provided at the tip of the outer peripheral side protruding portion 20.

  The terminal block outer peripheral side engaging portion 25 is an engaging claw that protrudes in one direction as a specific shape. Further, the tip of the engaging claw which is the terminal block outer peripheral side engaging portion 25 is directed in the direction of the shaft 9. The distal end of the engaging claw is inserted from the outer peripheral side into the opening in the concave shape of the outer peripheral engaging portion 17, whereby the outer peripheral engaging portion 17 and the terminal stand outer peripheral engaging portion 25 are engaged. That is, the outer peripheral side of the terminal block 5 is engaged with and held by the outer peripheral wall 14 of the insulator 3. Furthermore, it can be said that the terminal block outer peripheral side engaging portion 25 is an engaging claw that biases the outer peripheral wall 14 from the outer peripheral side to the inner peripheral side.

  The sandwiching portion 21 is a post which is positioned on the outer peripheral side than the inner peripheral side protruding portion 19 and on the inner peripheral side than the outer peripheral side protruding portion 20 and protrudes downward from the bottom surface of the terminal block 5. As shown in FIG. 5, when the terminal block 5 and the insulator 3 are engaged, the sandwiching portion 21 abuts on the inner peripheral side of the outer peripheral wall 14 on the upper side of the insulator 3. As a result, the outer peripheral side protruding portion 20 holds the outer peripheral side of the outer peripheral wall 14, and the pinching portion 21 holds the inner peripheral side of the outer peripheral wall 14. That is, the holding portion 21 and the outer peripheral side protruding portion 20 sandwich the outer peripheral wall 14.

  The plate-like support portion 22 is located on the same plane as the inner peripheral wall 13, that is, on the same circumference as the inner peripheral side protruding portion 19. Further, the plate-like support portion 22 is directed downward from the bottom surface of the inner peripheral end of the terminal block 5 and protrudes in a plate shape along the circumference of the inner peripheral wall 13. Further, the length in the circumferential direction of the plate-like support portion 22 is at least two or more the length of the adjacent inner peripheral wall 13. Furthermore, as shown in FIG. 5, when the terminal block 5 and the insulator 3 are engaged and held, the axial length (height) of the plate-like support 22 is formed on the plate-like support 22 at the top of the inner circumferential wall 13. Is the length of contact.

  FIG. 6 is a schematic view showing an enlarged view of a gap generated between the bottom surface of the terminal block 5 of the motor 1 according to Embodiment 1 and the opening surface of the terminal pin insertion hole 12. As shown in FIG. 6, when the terminal block 5 and the insulator 3 are engaged, the length of the gap in the rotational axis direction is the opening surface of the terminal pin insertion hole 12, that is, the terminal block side end surface and the insulator of the terminal hole 18. The distance (gap) between the three side surfaces is a length that is larger than the diameter of the winding 4. Although FIG. 6 describes the case where the terminal pin 11 is on the inner circumferential side, the terminal pin 11 may be on the outer circumferential side.

  The above is the structure of the motor 1, the winding fixing structure, the respective engaging portions, and the positional relationship thereof.

  Subsequently, an operation process for engaging the terminal block 5 and the insulator 3 will be described.

  First, the insulators 3a and 3b are inserted from the vertical direction of each slot of the stator core 15, and then the terminal pin 11 is inserted into the terminal pin insertion hole 12. After the terminal pin 11 is inserted, the end of the winding 4 is wound around the terminal pin 11, and the winding 4 is wound so as to cover the insulator 3 provided on the stator core 15. Thereafter, the terminal block 5 is pushed into the insulator 3a from the top surface side so as to penetrate the terminal pin 11 into the terminal hole 18 (see FIGS. 4A and 4B).

  When the terminal block is pushed in, the terminal block inner peripheral engaging portion 24, ie, the engaging claws engage with the inner peripheral side engaging portion 16 from the outer peripheral side, and the outer peripheral side engaging portion 17 from the outer peripheral side The side engagement portion 25 or the engagement claws engage.

  As a result, it is possible to suppress the positional deviation of the terminal block 5 in the inner circumferential direction and the positional deviation in the axial direction.

  Further, when the terminal block 5 is pushed in, the tip end of the holding portion 21 contacts the outer peripheral wall 14 of the insulator 3 and biases it from the inner peripheral side to the outer peripheral side. That is, the sandwiching portion 21 is positioned on the inner peripheral side of the outer peripheral wall 14, which makes it possible to suppress the positional deviation of the terminal block 5 to the outer peripheral side.

  Furthermore, since the gap generated between the terminal hole 18 and the terminal pin insertion hole 12 is larger than the diameter of the winding, the winding 4 entwined on the terminal pin 11 has a bottom surface of the terminal hole 18 and the terminal pin insertion hole 12. It is possible to suppress disconnection due to being pinched in the vertical direction by the surface in the terminal block 5 direction.

  Further, when the terminal block 5 is pushed in, the plate-like support portions 22 come in contact with the highest position on the terminal block 5 side of the plurality (at least two) inner peripheral walls 13, ie, the terminal block side top 27. Here, the plurality of insulating members 33a constituting the insulator 3a are relatively soft and made of resin, and when a plurality of insulating members 33a are connected in the circumferential direction, a wavelike distortion is formed due to the accuracy. On the other hand, the plate-like support 22 plays a role of correcting distortion.

  Further, by forming the inner peripheral side projecting part 19 as the projecting part, the outer peripheral side projecting part 20, the holding part 21 and the plate-like support part 22 in the terminal block 5, the insulating members 33a constituting the insulator 3a are made the same, That is, the shape can be simplified. Further, similarly, the insulating members 33b constituting the insulator 3b can be made identical to simplify the shape. Thereby, it becomes possible to hold down the mold cost of insulator 3.

  Further, when the terminal block 5 and the insulator 3 are engaged, the inner peripheral side protruding portion 19 is positioned on the outer peripheral side than the innermost periphery of the stator 2, and the inner peripheral end portion of the terminal block 5 Is the same as the inner circumferential wall 13 or located on the outer circumferential side of the inner circumferential wall 13. Therefore, the rotor 6 can be easily inserted into the stator 2 without being obstructed by the terminal block 5.

(Modification)
Hereinafter, referring to FIG. 7 and FIG. 8, the inside of the terminal block which is the outer peripheral engaging portion 17 which is the insulating member side engaging portion 34, the inner peripheral engaging portion 16 and the terminal block side engaging portion 35. A modification of the circumferential engagement portion 24, the terminal stand outer circumferential engagement portion 25, and the pinching portion engagement portion 26 (see FIG. 7) provided on the pinching portion 21 will be described.

  FIGS. 7 and 8 are cross-sectional views showing a simplified positional relationship when the terminal block 5 and the insulator 3 of the motor 1 according to the modification are engaged.

  In the example shown in FIG. 7, the outer peripheral side engaging portion 17 is provided with two concave portions opening toward the outer peripheral side and the inner peripheral side. And the terminal block outer peripheral side engaging part 25 which is an engaging claw is provided in the front-end | tip of the outer peripheral side protrusion part 20 toward the inner peripheral side. In addition, a pinching engagement portion 26 is provided at the tip of the pinching portion 21. The pinching engagement portion 26 which is an engagement claw is provided toward the outer peripheral side of the pinching engagement portion 26. These two engagement claws engage with the recess which is the outer peripheral engagement portion 17 from the inner and outer peripheral sides. Although FIG. 7 shows an example in which the outer peripheral side engaging portion 17 is provided with two recessed portions opening toward the outer peripheral side and the inner peripheral side, the two recessed portions may be in communication with each other. .

  In the example shown in FIG. 8, the outer peripheral side engaging portion 17 is provided with a concave portion opening toward the inner periphery. And the outer peripheral side protrusion part 20 is not provided with the engagement nail | claw. That is, the outer peripheral side protruding portion 20 only biases the outer peripheral side engaging portion 17 from the outer peripheral side. And, as the pinching portion engaging portion 26 provided at the tip of the pinching portion 21, an engaging claw that protrudes toward the outer peripheral side engages with the concave portion from the inside.

  Although two examples are shown in FIG. 7 and FIG. 8, no recess is provided in the outer peripheral engaging portion 17 as another example, and the outer peripheral engaging portion 17 in the outer peripheral projecting portion 20 and the holding portion 21, that is, the outer peripheral The wall 14 may be biased and held. In this case, the engagement claws are not provided at the tip of the outer peripheral side protrusion 20 and the tip of the holding portion 21.

  Alternatively, the plate-like support 22 may be provided on the outer peripheral wall 14 side. That is, the plate-like support 22 is positioned on the same plane as the outer peripheral wall 14, that is, on the same circumference as the outer peripheral side protrusion 20, facing downward from the bottom surface of the outer peripheral end of the terminal block 5, and Make it project like a plate along the circumference. Further, the length in the circumferential direction of the plate-like support portion 22 is equal to or longer than the length of at least two adjacent outer peripheral walls. Further, the axial length (height) of the plate-like support 22 is such that the plate-like support 22 abuts on the upper portion of the outer peripheral wall 14 when the terminal block 5 and the insulator 3 are engaged and held.

  Further, the plate-like support 22 may be provided on both the outer peripheral wall 14 and the inner peripheral wall 13. In this case, the stability of the insulator 3 is increased more than provided on one side.

  The motor according to the present invention improves the versatility of the insulator by reducing the insulator, reduces the insulator mold cost, reduces the breakage of the winding wire at the time of assembling the motor, simplifies the assembling operation, and the terminal block The displacement at the time of fixing the insulator can be suppressed, and can be applied to, for example, a driving motor for a fan.

1 Motor 2 Stator 3, 3a, 3b Insulator 4 Winding 5 Terminal Block 6 Rotor (Rotor)
7a, 7b Housing 9 Shaft (Rotating shaft)
10a, 10b Bearing 11 terminal pin 12 terminal pin insertion hole 13 inner peripheral wall 14 outer peripheral wall 15 stator core (stator core)
16 inner circumferential engaging portion 17 outer circumferential engaging portion 18 terminal hole 19 inner circumferential protruding portion (projecting portion)
20 Outer peripheral side projection (projection)
21 nipping portion 22 plate-like support portion 24 terminal block inner circumferential side engaging portion (terminal block side engaging portion)
25 Terminal block outer peripheral side engaging part (terminal block side engaging part)
Reference Signs List 26 clamping engaging portion 27 terminal block side top portion 33a, 33b insulating member 34 insulating member side engaging portion 35 terminal block side engaging portion 100 motor 101 housing 102 stator core 103 insulator 107 terminal block 109 shaft 121 terminal pin

Claims (10)

Winding comprising an insulator provided on a stator core disposed on an outer peripheral side of a cylindrical rotor rotating about an axis of rotation and a terminal block for fixing an end of a winding wound on the insulator In the line fixing structure,
The terminal block is
A projecting portion projecting toward the insulator on one surface of the plate;
A terminal block side engaging portion engaged with the insulator at a tip end of the projecting portion;
The insulator is
A plurality of insulating members connected in a circumferential direction to cover the stator core;
And an insulating member side engaging portion engaged with the terminal block side engaging portion by the insulating member.
Winding fixed structure. The insulating member is
An inner circumferential wall corresponding to the inner circumference of the stator core;
An outer peripheral wall corresponding to the outer periphery of the stator core;
The protrusion is
An inner circumferential protrusion corresponding to the inner circumferential wall;
An outer peripheral side protrusion corresponding to the outer peripheral wall;
The inner circumferential protrusion is
The terminal block has a terminal block inner circumferential side engaging portion engaged with the inner peripheral wall at the tip,
The terminal block inner circumferential engagement portion is
It is an engaging claw which urges the inner peripheral wall from the outer peripheral side to the inner peripheral side at the tip of the inner peripheral side protruding portion,
The terminal block is
The winding fixing structure according to claim 1, wherein an inner circumferential end portion is located the same as the inner circumferential wall or an outer circumferential side than the inner circumferential wall. The winding fixing structure according to claim 2, further comprising: a holding portion that holds the outer peripheral wall between the outer peripheral side protruding portion and the inner peripheral side of the outer peripheral side protruding portion. The holding unit is
It has a clamping engagement portion at its tip end that engages with the outer peripheral wall,
The clamping engagement portion is
The winding fixing structure according to claim 3, which is an engaging claw which biases the outer peripheral wall from an inner peripheral side to an outer peripheral side at a tip end of the holding portion. The outer peripheral side projecting portion is
A terminal block outer peripheral side engaging portion engaged with the outer peripheral wall is provided at the tip,
The terminal block outer peripheral side engaging portion is
The winding fixing structure according to claim 2, wherein the engagement claw is configured to urge the outer peripheral wall from the outer peripheral side to the inner peripheral side at a tip end of the outer peripheral side protruding portion. The terminal block is
And a plate-like support projecting toward the insulator on the same circumference as the inner circumferential protrusion.
The plate-like support is
The winding fixing structure according to claim 2, wherein the top of the inner peripheral wall on the terminal block side is abutted over the at least two adjacent inner peripheral walls. The terminal block is
It has a plate-like support that protrudes toward the insulator on the same circumference as the outer peripheral side protrusion,
The plate-like support is
The winding fixing structure according to claim 2, which abuts on the terminal block side top of the outer peripheral wall over at least two adjacent outer peripheral walls. The length of the protrusion in the rotation axis direction is
A predetermined clearance is formed between the terminal block side end face of the insertion hole into which the terminal pin provided in the insulator is inserted and the terminal hole formed in the terminal block and into which the terminal pin is inserted. The winding fixed structure according to 1. The width of the gap in the rotational axis direction is
The winding fixing structure according to claim 8, which is larger than the diameter of the winding. A cylindrical rotor that rotates around an axis of rotation;
A stator that rotates the rotor by energization on the outer peripheral side of the rotor;
A winding fixing structure according to claim 1;
And a winding wound on an insulator of the winding structure.

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