Insulator, stator, and motor

Abstract

To provide an insulator, a stator, and a motor for which the route of a nozzle to be used to wind a coil is ensured.SOLUTION: An insulator 5 provided between a stator core and a 3-phase coil wound around the stator core comprises: a body part 61 that covers the part of the stator core around which the coil is wound to insulate the stator core and the coil; a locking part 62 arranged at an end in a radially inner side of the body part 61; and a plurality of crossover holding parts 63 that are arranged outside the body part 61 in a radial direction and hold a crossover of the coil. At least one of the plurality of crossover holding parts 63 has its circumferential length outside in a radial direction formed to be shorter than its circumferential length inside in the radial direction when viewed from the axial direction.SELECTED DRAWING: Figure 9

Description

Technical Field

[0001] The present disclosure relates to an insulator, a stator, and a motor.

Background Art

[0002] Techniques related to a motor including a stator having a stator core and a coil, a rotor, and an insulator are known (see, for example, Patent Document 1). In the technique described in Patent Document 1, the insulator has a structure for improving the cooling efficiency by the cooling oil supplied to the coil wound around the stator core.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In order to reduce the size of the motor and improve the output, it was necessary to reduce the number of poles. By reducing the number of poles, the number of coils wound around one tooth increases. Therefore, it is necessary to make the locking portion of the insulator provided to restrict the disconnection of the coil larger than the locking portion of the conventional insulator. However, the path of the nozzle used when winding the coil may interfere with the locking portion of the insulator as in the conventional case. Therefore, the insulator needs to secure the path of the nozzle used when winding the coil.

[0005] An object of the present disclosure is to provide an insulator, a stator, and a motor that secure the path of the nozzle used when winding the coil.

Means for Solving the Problems

[0006] According to the present disclosure, an insulator is provided which is disposed between a stator core and a three-phase coil wound around the stator core, comprising: a main body portion that covers the portion of the stator core around which the coil is wound to insulate the stator core from the coil; a locking portion disposed at the radially inner end of the main body portion; and a plurality of jumper wire holding portions disposed radially outer of the main body portion for holding the jumper wires of the coil, wherein at least one of the plurality of jumper wire holding portions is formed such that, in an axial view, the circumferential length on the radially outer side is shorter than the circumferential length on the radially inner side.

[0007] A motor stator is provided comprising the above-mentioned insulator, the stator core on which the insulator is mounted, and a coil wound around the stator core via the insulator.

[0008] According to this disclosure, a motor is provided comprising the stator described above and a rotor that rotates relative to the stator. [Effects of the Invention]

[0009] The present disclosure provides an insulator, stator, and motor that secure a path for a nozzle used when winding a coil. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a schematic diagram showing a stator having an insulator according to the first embodiment. [Figure 2] Figure 2 is a schematic perspective view showing the stator in Figure 1 without the coils. [Figure 3] Figure 3 is an exploded perspective view of a stator having the insulator shown in Figure 2. [Figure 4] Figure 4 is a perspective view of the first member of the insulator according to the first embodiment. [Figure 5] Figure 5 is a perspective view of the first member of the insulator according to the first embodiment. [Figure 6] Figure 6 is a schematic diagram of the first member of the insulator according to the first embodiment. [Figure 7] Figure 7 is a cross-sectional view of the first member of the insulator according to the first embodiment, taken along line AA. [Figure 8] Figure 8 is a cross-sectional view of the first member of the insulator according to the first embodiment, taken along line BB. [Figure 9] Figure 9 is a plan view of the first member of the insulator according to the first embodiment. [Figure 10] Figure 10 is a perspective view of the second member of the insulator according to the first embodiment. [Figure 11] Figure 11 is a perspective view of the first and second members of the insulator according to the first embodiment. [Figure 12] Figure 12 is a schematic diagram illustrating the nozzle path. [Figure 13] Figure 13 is a schematic diagram illustrating the nozzle path. [Modes for carrying out the invention]

[0011] The embodiments described below will be explained with reference to the drawings, but the present invention is not limited thereto. The components of the embodiments described below can be combined as appropriate. In addition, some components may not be used.

[0012] [First Embodiment] <motor> FIG. 1 is a diagram schematically showing a stator having an insulator according to the first embodiment. FIG. 2 is a perspective view schematically showing a state where no coil is arranged on the stator shown in FIG. 1. FIG. 3 is an exploded perspective view of the stator having the insulator shown in FIG. 2. In each figure, the shape of the coil 3 is schematically shown. The stator including the insulator is arranged in a three-phase 24-pole segment type switched reluctance motor (not shown). The motor includes a cylindrical stator 1 and a rotor (not shown) arranged inside the stator 1. The stator 1 has a cylindrical stator core 2 and a coil 3 supported by the stator core 2. The inner peripheral surface of the stator 2 and the outer peripheral surface of the rotor face each other with a gap therebetween.

[0013] In the following description, the direction parallel to the rotation axis AX of the motor is referred to as the axial direction. One side in the axial direction is referred to as the one axial side, and the opposite side of the one axial side is referred to as the other axial side. Further, the direction around the rotation axis AX is referred to as the circumferential direction. One side of the rotation direction in the circumferential direction is referred to as the one circumferential side, and the opposite side of the one circumferential side is referred to as the other circumferential side. Furthermore, the radial direction is the radial direction of the rotation axis AX. The direction away from the central axis AX in the radial direction is referred to as the outer radial side, and the opposite side of the outer radial side is referred to as the inner radial side.

[0014] <Stator Core> The stator core 2 has a main body portion 20, teeth 21, and slots 22 for accommodating the coil 3. The slot 22 is a recess recessed radially outward from the inner peripheral surface. A plurality of slots 22 are provided in the circumferential direction on the inner peripheral surface of the stator core 2. In the present embodiment, 24 slots 22 are arranged in the circumferential direction on the stator core 2. In the present embodiment, the number of slots of the stator 2 is 24 slots. The slot 22 extends in the axial direction. The slot 22 is arranged on the inner peripheral surface. The slot 22 opens toward the one axial side and the other axial side and the inner radial side.

[0015] The stator core 2 has a plurality of teeth 21 disposed between adjacent slots 22 in the circumferential direction. In the present embodiment, 24 teeth 21 are disposed in the stator core 2 in the circumferential direction. The teeth 21 are the portions of the stator core 2 around which the coil 3 is wound. The teeth 21 support the coil 3. The teeth 21 are inserted into the openings of the coil 3.

[0016] The coil 3 is disposed around the teeth 21. The coil 3 is supported by the teeth 21. The coil 3 has an opening. The teeth 21 are inserted into the opening of the coil 3. The coil 3 is attached to the stator core 2 via the insulator 5. Since the number of poles of the motor is reduced, the coil 3 wound around one tooth 21 is more than that of a conventional 36-pole motor.

[0017] The coil 3 includes a coil body portion and a coil end portion not shown in the figure. The portion of the coil 3 accommodated in the slot 22 is the coil body portion. The portion of the coil 3 protruding axially from the stator core 2 is the coil end portion.

[0018] The coil 3 is composed of a linear or strip conductor such as a rectangular wire, a round wire, or a plate-shaped segment conductor. The coil 3 is composed of a conductor arranged in a spiral shape. The coil 3 may be formed by spirally winding a single conductor, or may be formed by spirally connecting a plurality of conductors. The winding method and connection method of the coil 3 are not limited.

[0019] The coil 3 includes a phase A coil (first-phase coil) 3A, a phase B coil (second-phase coil) 3B, and a phase C coil (third-phase coil) 3C. When there is no particular need to distinguish between the phase A coil 3A, the phase B coil 3B, and the phase C coil 3C, it is described as the coil 3.

[0020] In the circumferential direction, the A-phase coil 3A and the B-phase coil 3B are adjacent. In the circumferential direction, the B-phase coil 3B and the C-phase coil 3C are adjacent. In the circumferential direction, the C-phase coil 3C and the A-phase coil 3A are adjacent. The B-phase coil 3B is positioned next to the A-phase coil 3A on one side in the circumferential direction. The C-phase coil 3C is positioned next to the B-phase coil 3B on one side in the circumferential direction. The A-phase coil 3A is positioned next to the C-phase coil 3C on one side in the circumferential direction.

[0021] <Insulator> The insulator 5 is made of a resin material. The insulator 5 is interposed between the coil 3 and the stator core 2. The insulator 5 is divided into multiple sections in the circumferential direction. In this embodiment, the insulator 5 is divided into 12 sections. In addition, the insulator 5 is divided into two sections in the axial direction. In other words, the insulator 5 is divided in the axial direction into a first member 6 on one side and a second member 7 on the other side.

[0022] One insulator 5, divided in the circumferential direction, has a double-unit structure. Because one insulator 5, divided in the circumferential direction, has a double-unit structure, it is not possible to fix the A phase, B phase, and C phase. Therefore, one insulator 5, divided in the circumferential direction, has the SN winding fixed and makes the A phase, B phase, and C phase common.

[0023] The first member 6 of a single insulator 5 divided in the circumferential direction will be described using Figures 4 to 6. Figure 4 is a perspective view of the first member of the insulator according to the first embodiment. Figure 5 is a perspective view of the first member of the insulator according to the first embodiment. Figure 6 is a schematic diagram of the first member of the insulator according to the first embodiment. Figure 6 is a schematic diagram in which the circumferential direction is linear for explanatory purposes. The first member 6 has a wall portion 60, a main body portion 61, a locking portion 62, and a connecting wire holding portion 63.

[0024] The wall portion 60 has a shape in which a disc is divided into multiple parts in the circumferential direction. When all of the wall portions 60 of the first member 6 of the insulator 5, which are divided in the circumferential direction, are connected, a disc shape is formed.

[0025] The main body portion 61 protrudes radially inward from the radially inward end of the wall portion 60. The main body portion 61 is the part around which the coil 3 is wound. The main body portion 61 is connected to one axial end of the main body portion 71 of the second member 7. When assembled with the main body portion 71 of the second member 7, the main body portion 61 is positioned to cover the teeth 21 of the stator core 2 around which the coil 3 is wound. The main body portion 61 is positioned to cover one axial side of the teeth 21.

[0026] The locking portion 62 restricts the coil 3 from coming out of the main body portion 61. The locking portion 62 is longer in one axial direction than the main body portion 61 and extends circumferentially. The locking portion 62 is formed to have a greater axial height than the locking portion of a conventional insulator. The locking portion 62 is positioned radially inward of the main body portion 61. The locking portion 62 is connected to one axial end of the locking portion 72 of the second member 7.

[0027] The jumper wire holder 63 holds the jumper wires of each phase of the coil 3. The jumper wire holder 63 holds the jumper wires 3AT, 3BT, and 3CT. The jumper wire holder 63 is located on one axial side of the wall portion 60. The jumper wire holder 63 is located radially outward from the main body portion 61.

[0028] The crossover wire holder 63 is divided into multiple sections in the circumferential direction. In this embodiment, the crossover wire holder 63 is divided into a crossover wire holder 631, a crossover wire holder 632, a crossover wire holder 633, a crossover wire holder 634, and a crossover wire holder 635. The crossover wire holder 631, 632, 633, 634, and 635 are formed in different shapes. The planar shapes of the crossover wire holder 631, 632, 633, 634, and 635 will be described later. When there is no particular need to distinguish between the crossover wire holder 631, 632, 633, 634, and 635, they will be described as the crossover wire holder 63.

[0029] The connecting wire holding portion 63 has a first groove 64A, a second groove 64B, and a third groove 64C formed therein. The first groove 64A, the second groove 64B, and the third groove 64C are spaced apart in the axial direction. The first groove 64A, the second groove 64B, and the third groove 64C are formed in different shapes. For example, the first groove 64A, the second groove 64B, and the third groove 64C have different radial depths. For example, the first groove 64A, the second groove 64B, and the third groove 64C have different axial widths.

[0030] The first groove 64A is a groove that holds the jumper wire 3AT of the A-phase coil 3A. The first groove 64A is formed on the outer circumference of the jumper wire holding portion 63. The first groove 64A opens radially outward. The first groove 64A is located on one axial side of the jumper wire holding portion 63. The jumper wire 3AT housed in the first groove 64A does not intersect with the jumper wires 3BT and 3CT of other phases on its path to the slot 22 of the stator core 2.

[0031] The second groove 64B is a groove that holds the jumper wire 3BT of the B-phase coil 3B. The second groove 64B is formed on the outer circumference of the jumper wire holding portion 63. The second groove 64B opens radially outward. The second groove 64B is located on the other axial side of the first groove 64A of the jumper wire holding portion 63. The jumper wire 3BT housed in the second groove 64B does not intersect with the jumper wires 3AT and 3CT of other phases on its path to the slot 22 of the stator core 2.

[0032] The third groove 64C is a groove that holds the jumper wire 3CT of the C-phase coil 3C. The third groove 64C is formed on the outer circumference of the jumper wire holding portion 63. The third groove 64C opens radially outward. The third groove 64C is located on the other axial side of the second groove 64B of the jumper wire holding portion 63. The jumper wire 3CT housed in the third groove 64C does not intersect with the jumper wires 3AT and 3BT of other phases on its path to the slot 22 of the stator core 2.

[0033] In the jumper wire holding section 63 configured in this way, having a first groove 64A, a second groove 64B, and a third groove 64C, the first coil end portion of the jumper wire 3AT of the A-phase coil 3A in the first groove 64A, the second coil end portion of the jumper wire 3BT of the B-phase coil 3B in the second groove 64B, and the third coil end portion of the jumper wire 3CT of the C-phase coil 3C in the third groove 64C are located at different positions in the radial direction.

[0034] The jumper wire holding portion 63 will be explained using Figure 7. Figure 7 is a cross-sectional view of the first member of the insulator according to the first embodiment, taken along line AA. At the position of line AA shown in Figure 6, as shown in Figure 7, the radial height of the jumper wire 3AT of the A-phase coil 3A housed in the first groove 64A is lower than the radial height of the jumper wire 3BT of the B-phase coil 3B housed in the second groove 64B. The radial height of the jumper wire 3BT of the B-phase coil 3B housed in the second groove 64B is lower than the radial height of the jumper wire 3CT of the C-phase coil 3C housed in the third groove 64C. At the position of line AA shown in Figure 6, as shown in Figure 7, only the jumper wire 3BT of the B-phase coil 3B housed in the second groove 64B extends to the slot 22 of the stator core 2. As a result, at the position of line AA shown in Figure 6, as shown in Figure 7, the jumper wire 3BT housed in the second groove 64B does not intersect with the jumper wires 3AT and 3CT of the other phases on its path to the slot 22 of the stator core 2.

[0035] The radial height of the jumper wire 3AT of the A-phase coil 3A housed in the first groove 64A is, in other words, the depth of the first groove 64A. The radial height of the jumper wire 3BT of the B-phase coil 3B housed in the second groove 64B is, in other words, the depth of the second groove 64B. The radial height of the jumper wire 3CT of the C-phase coil 3C housed in the third groove 64C is, in other words, the depth of the third groove 64C.

[0036] The jumper wire holding section 63 will be explained using Figure 8. Figure 8 is a cross-sectional view of the BB line of the first member of the insulator according to the first embodiment. At the BB line position shown in Figure 6, as shown in Figure 8, the radial height of the jumper wire 3AT of the A-phase coil 3A housed in the first groove 64A is lower than the radial height of the jumper wire 3BT of the B-phase coil 3B housed in the second groove 64B. The radial height of the jumper wire 3BT of the B-phase coil 3B housed in the second groove 64B is lower than the radial height of the jumper wire 3CT of the C-phase coil 3C housed in the third groove 64C. At the BB line position shown in Figure 6, only the jumper wire 3AT of the A-phase coil 3A housed in the first groove 64A extends to the slot 22 of the stator core 2. As a result, at the BB line position shown in Figure 6, as shown in Figure 8, the jumper wire 3AT housed in the first groove 64A does not intersect with the jumper wires 3BT and 3CT of other phases on its path to the slot 22 of the stator core 2.

[0037] The planar shape of the first member of the insulator will be explained using Figure 9. Figure 9 is a plan view of the first member of the insulator according to the first embodiment. The shape shown in Figure 9 is one of a plurality of members into which the first member 6 is divided in the circumferential direction. In other words, the members shown in Figure 9 are connected in the circumferential direction to form the first member 6 which has an annular planar shape.

[0038] The connecting wire holder 631 is connected to the connecting wire holder 635 of another member located adjacent to it on one side in the circumferential direction. The connecting wire holder 635 is connected to the connecting wire holder 631 of another member located adjacent to it on one side in the circumferential direction.

[0039] The crossover wire holder 632 is located radially outward of the main body 612. The crossover wire holder 632 is located on an axis passing through the circumferential center of the main body 612. The crossover wire holder 634 is located radially outward of the main body 614. The crossover wire holder 634 is located on an axis passing through the circumferential center of the main body 614. The crossover wire holders 631, 633, and 635 are located circumferentially off the axis passing through the circumferential center of the main body 612 and the axis passing through the circumferential center of the main body 614. The crossover wire holder 633 is located between the crossover wire holder 632 and the crossover wire holder 634 located on the other circumferential side. The connected crossover wire holders 635 and 631 are located between the crossover wire holder 634 and the crossover wire holder 631 located on the other circumferential side.

[0040] At least one of the jumper wire holders 631, 632, 633, 634, and 635 is formed such that, in an axial view, its circumferential length on the radially outer side is shorter than its circumferential length on the radially inner side. In this embodiment, the jumper wire holders 632 and 634 are formed such that their circumferential length on the radially outer side is shorter than their circumferential length on the radially inner side. As a result, the distance between adjacent jumper wire holders 63 in the circumferential direction is greater on the radially outer side than on the radially inner side. In addition, a gap is created between adjacent jumper wire holders 63 in the circumferential direction, extending in a direction inclined with respect to the radial direction. This gap becomes the passage Q of the nozzle 100 used when winding the coil 3 onto the stator core 2.

[0041] The passage Q of the nozzle 100 is defined by a gap extending in a direction inclined with respect to the radial direction between adjacent connecting wire holding portions 63 in the circumferential direction, and a circumferential gap between adjacent locking portions 62 in the circumferential direction. The passage Q of the nozzle 100 is shown by a dashed line in Figure 9. In this embodiment, the passage Q is arranged in a direction in which the centerline intersects the radial direction.

[0042] Aisle Q includes Aisle Q1, Aisle Q2, Aisle Q3, and Aisle Q4. When there is no particular need to distinguish between Aisle Q1, Aisle Q2, Aisle Q3, and Aisle Q4, they are referred to simply as Aisle Q.

[0043] The passage Q1 passes between the crossover wire holder 631 and the crossover wire holder 632. The passage Q1 is formed between a straight line L11 and a straight line L12. Straight line L11 is a straight line connecting the radially inner end on the other circumferential side of the crossover wire holder 631 and the other circumferential end of the locking portion 624 of the main body portion 614, which is located radially inner of the crossover wire holder 634, which is adjacent to the crossover wire holder 635 connected to the crossover wire holder 631 on one circumferential side. Straight line L12 is a straight line on the extension of the end face on one circumferential side of the crossover wire holder 632.

[0044] The passage Q2 passes between the crossover wire holder 632 and the crossover wire holder 633. The passage Q2 is formed between a straight line L21 and a straight line L22. Straight line L21 is a straight line on the extension of the other end face in the circumferential direction of the crossover wire holder 632. Straight line L22 is a straight line connecting the radially inward end on one side in the circumferential direction of the crossover wire holder 633 and the circumferential end on one side of the locking portion 624 of the main body portion 614, which is located radially inward of the adjacent crossover wire holder 634 on the other side in the circumferential direction of the crossover wire holder 633.

[0045] The passage Q3 passes between the crossover wire holder 633 and the crossover wire holder 634. The passage Q3 is formed between a straight line L31 and a straight line L32. Straight line L31 is a straight line connecting the radially inner end on the other circumferential side of the crossover wire holder 633 and the other circumferential end of the locking portion 622 of the main body portion 612, which is located radially inner of the crossover wire holder 632, which is located adjacent to the crossover wire holder 633 on one circumferential side. Straight line L32 is a straight line on the extension of the end face on one circumferential side of the crossover wire holder 634.

[0046] The passage Q4 passes between the crossover wire holder 634 and the crossover wire holder 635. The passage Q4 is formed between a straight line L41 and a straight line L42. Straight line L41 is a straight line on the extension of the other end face in the circumferential direction of the crossover wire holder 634. Straight line L42 is a straight line connecting the radially inward end on one side in the circumferential direction of the crossover wire holder 635 and the radially inward end of the locking portion 622 of the main body portion 612, which is located on the radially inward side of the crossover wire holder 632, which is adjacent to the crossover wire holder 631 connected to the crossover wire holder 635 in the circumferential direction.

[0047] Passage Q1 and passage Q4 intersect between the locking portion 624 of the main body 614 located radially inward of the crossover wire holding portion 634 and the locking portion 622 located adjacent to the locking portion 624 on the other side in the circumferential direction. Passage Q2 and passage Q3 intersect between the locking portion 622 of the main body 612 located radially inward of the crossover wire holding portion 632 and the locking portion 624 located adjacent to the locking portion 622 on the other side in the circumferential direction.

[0048] The circumferential end of the locking portion 622 is located on the extension of the circumferential end face of the jumper wire holder portion 632. The circumferential end of the locking portion 624 is located on the extension of the circumferential end face of the jumper wire holder portion 634. The circumferential end of the locking portion 622 is located on the extension of the circumferential end face of the jumper wire holder portion 632. The circumferential end of the locking portion 624 is located on the extension of the circumferential end face of the jumper wire holder portion 634.

[0049] The distances between the jumper wire holders 631 and 632, 632 and 633, 633 and 634, and 634 and 635 are narrowest on the radially inward side. The distance d between the narrowest part of the jumper wire holders 631 and 632, 632 and 633, 633 and 634, and 635 are such that the nozzle 100 used when winding the coil 3 onto the stator core 2 can pass through. The distance d is, for example, 6.3 mm.

[0050] In this embodiment, in an axial view, the spacing between adjacent locking portions 62 in the circumferential direction is, for example, 7.2 mm at its narrowest point. In this embodiment, in an axial view, the spacing between adjacent connecting wire holding portions 63 in the circumferential direction is, for example, 6.3 mm or more and 6.6 mm or less at its narrowest point.

[0051] The angle θ1 between the other circumferential end of the jumper wire holder 632 and the one circumferential end of the jumper wire holder 633 is, for example, 16.4°. The angle θ2 between the other circumferential end of the jumper wire holder 633 and the one circumferential end of the jumper wire holder 634 is, for example, 9.5°. The angle θ3 between the one circumferential end of the jumper wire holder 632 and the one circumferential end of the jumper wire holder 633 is, for example, 3°. The angle θ4 between the other circumferential end of the jumper wire holder 633 and the other circumferential end of the jumper wire holder 634 is, for example, 5°. The angle θ5 between the other circumferential end of the jumper wire holder 631 and the one circumferential end of the jumper wire holder 633 is, for example, 11.5°. The angle θ6 between the other circumferential end of the connecting wire holder 633 and the one circumferential end of the connecting wire holder 635 is, for example, 10.5°.

[0052] In this embodiment, in an axial view, the angle formed by the opposite ends of adjacent connecting wire holders 63 in the circumferential direction is, for example, 9° to 17°.

[0053] The second member 7 of a single insulator 5 divided in the circumferential direction will be described using Figures 10 and 11. Figure 10 is a perspective view of the second member of the insulator according to the first embodiment. Figure 11 is a perspective view of the first and second members of the insulator according to the first embodiment. The second member 7 has a wall portion 70, a main body portion 71, and a locking portion 72. The shape shown in Figures 10 and 11 is one of a plurality of members into which the second member 7 is divided in the circumferential direction. In other words, the members shown in Figure 10 are connected in the circumferential direction to form a second member 7 with a planar shape that is annular.

[0054] The wall portion 70 has a shape in which a cylinder is divided into multiple sections in the circumferential direction. When all of the wall portions 70 of the second member 7 of the insulator 5, which are divided in the circumferential direction, are connected, a cylindrical shape is formed.

[0055] The main body portion 71 protrudes radially inward from the radially inward-facing surface of the wall portion 70. The main body portion 71 is the portion around which the coil 3 is wound. The main body portion 71 is connected to the other axial end of the main body portion 61 of the first member 6. When assembled with the main body portion 61 of the first member 6, the main body portion 71 is positioned to cover the teeth 21 of the stator core 2 around which the coil 3 is wound. The main body portion 71 is positioned to cover the other axial side of the teeth 21.

[0056] The locking portion 72 restricts the coil 3 from coming out of the main body portion 71. The locking portion 72 is longer in the other axial direction than the main body portion 71 and extends in the circumferential direction. The locking portion 72 is positioned radially inward of the main body portion 71. The locking portion 72 is connected to the other axial end of the locking portion 62 of the first member 6.

[0057] <Path during coil winding> The path of the nozzle 100 used when winding the coil 3 onto the stator core 2 will be explained using Figures 12 and 13. Figure 12 is a schematic diagram illustrating the nozzle path. Figure 13 is a schematic diagram illustrating the nozzle path. Figures 12 and 13 are schematic diagrams in which the circumferential direction is linear for illustrative purposes. The coil 3 is wound onto the stator core 2, which is assembled as a single unit, using the nozzle 100.

[0058] In Figures 12(a) and 13(a), the nozzle 100 is positioned along the radial direction. As shown in Figures 12(a) and 13(a), the locking portion 62 protrudes significantly more than in conventional designs. Therefore, if the nozzle 100 proceeds towards the main body portion 61 of the insulator 6, the locking portion 62 will interfere.

[0059] Therefore, as shown in Figures 12(b) and 13(b), the nozzle 100 is tilted diagonally with respect to the radial direction and inserted into the main body 61 side of the insulator 6. As shown in Figure 9, the narrowest part between adjacent connecting wire holding parts 63 is spaced apart by a distance d that allows the nozzle 100 to pass through. For this reason, the nozzle 100 can enter through this gap.

[0060] Then, as shown in Figures 12(c) and 13(c), the nozzle 100 is moved toward the locking portion 62 side of the insulator 6 while it is still tilted at an angle. The nozzle 100 passes between adjacent connecting wire holding portions 63 and reaches between adjacent locking portions 62.

[0061] Then, as shown in Figures 12(d) and 13(d), the nozzle 100 is returned to an orientation along the radial direction. Then, the position of the nozzle 100 is moved in order to begin winding the coil 3 onto the main body 61.

[0062] Then, as shown in Figures 12(e) and 13(e), the inclination of the nozzle 100 is changed and the coil 3 is wound around the main body 61.

[0063] In this way, coil 3 is wound around stator core 2.

[0064] <Effects> In this embodiment, at least one of the jumper wire holding portions 63 is formed such that, in an axial view, the circumferential length on the radially outer side is shorter than the circumferential length on the radially inner side. As a result, the distance between adjacent jumper wire holding portions 63 in the circumferential direction is greater on the radially outer side than on the radially inner side. In addition, a gap is created between adjacent jumper wire holding portions 63 in the circumferential direction, extending in a direction inclined with respect to the radial direction. This gap becomes the passage Q for the nozzle 100 used when winding the coil 3 onto the stator core 2. As a result, according to this embodiment, regardless of the height of the radially inner diameter side of the locking portion 62, it becomes unnecessary to move the nozzle 100 axially to avoid the locking portion 62. Furthermore, according to this embodiment, it is possible to simplify the movement of the nozzle 100 and prevent the jumper wire from coming off.

[0065] In this embodiment, one circumferential end of the locking portion 622 is located on the extension of one circumferential end face of the connecting wire holding portion 632. Also, the other circumferential end of the locking portion 622 is located on the extension of the other circumferential end face of the connecting wire holding portion 632. In this embodiment, one circumferential end of the locking portion 624 is located on the extension of one circumferential end face of the connecting wire holding portion 634. Also, the other circumferential end of the locking portion 624 is located on the extension of the other circumferential end face of the connecting wire holding portion 634. This ensures that the passage Q of the nozzle 100 is secured.

[0066] Thus, this embodiment can secure a gap extending in a direction inclined with respect to the radial direction between adjacent connecting wire holding portions 63 in the circumferential direction, a circumferential gap between adjacent locking portions 62 in the circumferential direction, and a passage Q for the nozzle 100. [Explanation of symbols]

[0067] 1... Stator, 2... Stator core, 21... Teeth, 22... Slot, 3... Coil, 3A... Phase A coil (first phase coil), 3AT... Jumper wire, 3B... Phase B coil (second phase coil), 3BT... Jumper wire, 3C... Phase C coil (third phase coil), 3CT... Jumper wire, 5... Insulator, 6... First component, 60... Wall section, 61... Main body section, 62... Locking section, 63... Jumper wire holder section, 64A... First groove, 64B... Second groove, 64C... Third groove, 7... Second component, 70... Wall section, 71... Main body section, 72... Locking section, 100... Nozzle, AX... Rotation axis, d... Distance, Q... Passage.

Claims

1. An insulator disposed between a stator core and a three-phase coil wound around the stator core, A main body portion that covers the portion of the stator core around which the coil is wound and insulates the stator core from the coil, A locking portion is positioned at the radially inward end of the main body portion, A plurality of jumper wire holding parts are arranged radially outward of the main body to hold the jumper wires of the coil, Equipped with, The multiple crossover wire holding units are, In an axial view, the connecting wire holding portion is arranged on an axis passing through the circumferential center of the main body, In an axial view, the connecting wire holding portion is positioned off-circumferentially from the axis passing through the circumferential center of the main body, Includes, The plurality of connecting wire holding portions, arranged on an axis passing through the circumferential center of the main body, are formed such that, in an axial view, the circumferential length on the radially outer side is shorter than the circumferential length on the radially inner side. Insulator.

2. The plurality of connecting wire holding parts arranged on an axis passing through the circumferential center of the main body part are such that the end of the locking part on one circumferential side is located on the extension of the end face on one circumferential side of the connecting wire holding part, The insulator according to claim 1.

3. The plurality of connecting wire holding parts arranged on an axis passing through the circumferential center of the main body part are such that the end of the locking part on the other circumferential side is located on the extension of the other circumferential side end face of the connecting wire holding part, The insulator according to claim 1 or 2.

4. An insulator according to any one of claims 1 to 3, The stator core on which the insulator is attached, A coil wound around the stator core via the insulator, A motor stator equipped with [a specific feature / feature].

5. The stator according to claim 4, A rotor that rotates relative to the stator, A motor equipped with the following features.

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