JP2023151453A - stator and motor - Google Patents

Abstract

To provide a stator that allows easy positioning of a coil lead wire and improves assembly efficiency.SOLUTION: A coil support portion 63 includes a first wide portion 631 provided on the outside in the radial direction and having a width in the circumferential direction larger than the width in the circumferential direction of a coil lead wire 41c, a narrow portion 632 provided on the radially inner side of the first wide portion and having a width in the circumferential direction smaller than the width in the circumferential direction of the coil lead wire, and a second wide portion 633 that is provided on the radially inner side of the narrow portion and has a circumferential width larger than the circumferential width of the coil lead wire and smaller than the circumferential width of the first wide portion. The coil support portion includes a first coil support portion 63A that supports the coil lead wire at the beginning of winding the coil, and a second coil support portion 63B that supports the coil lead wire at the end of winding the coil. At least the first wide portion of the second coil support portion extends obliquely in the circumferential direction with respect to the radial direction when viewed from the axial direction.SELECTED DRAWING: Figure 4

Description

The present invention relates to a stator and a motor.

A stator is known in which a coil connecting portion of a bus bar and a coil lead wire are connected by welding. The stator disclosed in Patent Document 1 has a structure in which a busbar holder has a notch-shaped guide portion extending in the radial direction for drawing out the coil lead wire onto the holder.

Japanese Patent Application Publication No. 2020-10470

When assembling the stator, the position of the coil lead wire at the end of winding the coil is not fixed at a predetermined position, and it becomes a free end and easily moves. Therefore, when it is necessary to adjust the position of the coil lead wire with respect to the coil connection portion, there is a problem in that work efficiency decreases.

In view of the above-mentioned circumstances, one of the objects of the present invention is to provide a stator and a motor that can easily perform the positioning work of the coil lead wire with respect to the coil connection portion and improve assembly efficiency.

One embodiment of the stator of the present invention includes a stator core, a coil, a bus bar, and a bus bar holder. The bus bar includes an annular bus bar main body and a coil connecting part that extends from the bus bar main body and is electrically connected to a coil lead wire of the coil. The busbar holder includes a holder main body that holds the busbar main body, and a cutout shape that axially passes through the holder main body and extends radially inward from an outer edge of the holder main body. A plurality of coil support parts are provided in the circumferential direction and support the coil lead wire along the axial direction at the inner edge on the inner side in the direction. The coil support portion is provided on the outside in the radial direction and has a first wide portion having a width in the circumferential direction larger than the width in the circumferential direction of the coil leader line, and is provided on the inside in the radial direction of the first wide portion, a narrow portion having a circumferential width smaller than the circumferential width of the coil leader; and a narrow portion provided radially inward of the narrow portion; and a second wide portion that is larger than the first wide portion and smaller than the circumferential width of the first wide portion. The coil support portion includes a first coil support portion that supports the coil lead wire at the beginning of winding of the coil, and a second coil support portion that supports the coil lead wire at the end of winding of the coil. At least the first wide portion of the second coil support portion extends obliquely in the circumferential direction with respect to the radial direction when viewed from the axial direction.

One aspect of the motor of the present invention is an electric compressor motor having the above-described stator and a rotor rotatably provided with respect to the stator, wherein the bus bar holder extends in the axial direction and has a diameter It has a concave portion that is concave from the inner end toward the outer side in the radial direction.

According to one aspect of the present invention, in the stator of a motor, the positioning of the coil lead wire with respect to the coil connection portion can be easily performed, and assembly efficiency can be improved.

FIG. 1 is a schematic cross-sectional view of a motor according to one embodiment. FIG. 2 is an exploded perspective view of the stator of one embodiment. FIG. 3 is a plan view of the stator of one embodiment. FIG. 4 is a perspective view of a portion of the stator of one embodiment. FIG. 5 is a partial plan view of a portion of the stator of one embodiment. FIG. 6 is a partial perspective view of a portion of the stator of one embodiment. FIG. 7 is a partial plan view of a portion of the insulator of one embodiment. FIG. 8 is a partial perspective view of a portion of an insulator of one embodiment. FIG. 9 is a longitudinal cross-sectional view of a portion of the stator of one embodiment. FIG. 10 is a partial cross-sectional view of a portion of the stator of one embodiment. FIG. 11 is a plan view of a modified stator. FIG. 12 is a partial perspective view of a portion of a stator of a modified example. FIG. 13 is a partial perspective view of a portion of a stator of a modified example. FIG. 14 is a perspective view of a modified coil support section. FIG. 15 is a partial perspective view of a portion of a stator of a modified example. FIG. 16 is a partial perspective view of a portion of a stator of a modified example.

Hereinafter, embodiments of the motor 10 and the stator 30 will be described based on the drawings.
In the following description, the axial direction of the central axis J of the motor 10 will be simply referred to as the "axial direction", and the radial direction centered on the central axis J will be simply referred to as the "radial direction", and the radial direction around the central axis J will be simply referred to as the "radial direction". The direction is simply called the "circumferential direction."

Furthermore, in the following description, the arrangement of the parts of the motor 10 and the stator 30 will be described with one axial side as the upper side and the other axial side as the lower side. However, the postures of the motor 10 and the stator 30 during actual use are not limited to the vertical direction described in this specification.

FIG. 1 is a schematic cross-sectional view of a motor 10 of this embodiment. FIG. 2 is an exploded perspective view of the stator 30 of this embodiment. FIG. 3 is a plan view of the stator 30. FIG. 4 is a perspective view of a portion of the stator 30. FIG. 5 is a partial plan view of a portion of the stator 30. As shown in FIG. FIG. 6 is a partial perspective view of a portion of the stator 30.

As shown in FIG. 1, the motor 10 of this embodiment includes a rotor 20 centered on a central axis J, a stator 30 disposed on the radially outer side of the rotor 20, a housing 11, and a plurality of bearings 15, 16. and. The motor 10 of this embodiment is an inner rotor type motor. The rotor 20 rotates around a central axis J.

Housing 11 accommodates rotor 20 and stator 30. The housing 11 includes a cylindrical portion 11a, a bottom wall portion 11c, and a bearing holding wall portion 11d. The cylindrical portion 11a has a cylindrical shape extending along the central axis J. The bearing holding wall portion 11d covers an opening on one axial side of the cylindrical portion 11a. The bearing holding wall portion 11d is fixed to the inner circumferential surface of the cylindrical portion 11a. The bearing holding wall portion 11d holds the bearing 15. The bottom wall portion 11c covers the opening on the other axial side of the cylinder portion 11a. The bottom wall portion 11c holds the bearing 16.

A refrigerant flows inside the housing 11 . The cylinder portion 11a is provided with a refrigerant inlet 11p and a refrigerant outlet 11q. The refrigerant inlet 11p and the refrigerant outlet 11q are arranged side by side in the axial direction. The refrigerant inlet 11p is located on one side of the stator 30 in the axial direction, and the refrigerant outlet 11q is located on the other side of the stator 30 in the axial direction. The refrigerant passes through the slots of the stator 30 in the housing 11 and flows from one side of the stator 30 in the axial direction to the other side.

The rotor 20 faces the stator 30 in the radial direction. The rotor 20 of this embodiment is arranged radially inside the stator 30. The rotor 20 includes a shaft 21, a rotor core 22, and a magnet 23. The shaft 21 has a cylindrical shape extending in the axial direction. Note that the shaft 21 may have a cylindrical shape extending in the axial direction. The shaft 21 is rotatably supported around a central axis J by a plurality of bearings 15 and 16. The plurality of bearings 15 and 16 are spaced apart from each other in the axial direction and are supported by the housing 11. That is, the shaft 21 is supported by the housing 11 via a plurality of bearings 15 and 16.

The rotor core 22 has a cylindrical shape extending in the axial direction. The rotor core 22 has a larger outer diameter than the shaft 21. The rotor core 22 has a smaller axial length than the shaft 21. The inner peripheral surface of the rotor core 22 is fixed to the outer peripheral surface of the shaft 21. The rotor core 22 is fixed to the shaft 21 by press fitting, adhesive, or the like. The rotor core 22 is located between the pair of bearings 15 and 16 in the axial direction. The magnet 23 is fixed to the outer periphery of the rotor core 22.

The stator 30 faces the rotor 20 with a gap in the radial direction. The stator 30 surrounds the rotor 20 from the outside in the radial direction all the way around in the circumferential direction. The stator 30 includes a stator core 31, an insulator 50, a plurality of coils 40, a busbar unit 6, and a plurality of insulating papers 3 (see FIGS. 3 to 6).

Stator core 31 surrounds rotor 20 from the outside in the radial direction. The stator core 31 is composed of, for example, a plurality of electromagnetic steel plates laminated in the axial direction. Stator core 31 is fixed to the inner peripheral surface of housing 11. The stator core 31 and the housing 11 are fixed by, for example, shrink fitting, press fitting, or the like.

Stator core 31 has a core back portion 31a and a plurality of teeth portions 31b. The core back portion 31a has an annular shape centered on the central axis J. The outer circumferential surface of the core back portion 31a facing outward in the radial direction is fixed to the inner circumferential surface of the cylindrical portion 11a.

The teeth portion 31b extends radially inward from the core back portion 31a. The plurality of teeth portions 31b are arranged along the circumferential direction. The plurality of teeth portions 31b are arranged at intervals from each other in the circumferential direction. The radially inner surface of each tooth portion 31b faces the radially outer surface of the rotor 20 with a gap therebetween.

The plurality of insulators 50 are attached to the stator core 31. The plurality of insulators 50 are attached to each of the plurality of teeth portions 31b from the inside in the radial direction. The insulator 50 is an insulating member that insulates between the coil 40 and the teeth portion 31b. The insulator 50 is made of resin, for example.

The insulator 50 includes an insulator main body 51 , an outer wall (wall) 53 , and an inner wall 54 . The stator 30 of this embodiment is provided with 15 insulators 50.

The insulator main body portion 51 has a rectangular tube shape extending in the radial direction. The insulator main body portion 51 is provided with a through hole 51h that penetrates in the radial direction. The teeth portion 31b is passed through the through hole 51h. Therefore, the insulator main body portion 51 surrounds the teeth portion 31b.

The inner wall portion 54 extends from the radially inner end of the insulator body portion 51 in a direction perpendicular to the radial direction. Similarly, the outer wall portion 53 extends from the radially outer end of the insulator body portion 51 in a direction perpendicular to the radial direction.

The inner wall portion 54 and the outer wall portion 53 have plate shapes whose plate surfaces extend in a curved manner along the circumferential direction. That is, the inner wall portion 54 and the outer wall portion 53 extend along the circumferential direction. The inner wall portions 54 and outer wall portions 53 of the plurality of insulators 50 are arranged in an annular shape along the circumferential direction.

FIG. 7 is a partial plan view of a part of the insulator 50. As shown in FIG. 7, the outer wall portion 53 has a pair of outer groove portions 53a that are recessed inward from both ends in the circumferential direction and extend in the axial direction. A part of the insulating paper 3, which will be described later, is inserted into the outer groove portion 53a from above. The groove width along the radial direction of the outer groove portion 53a is approximately the same dimension as the thickness of the insulating paper 3. The inner wall portion 54 has a pair of inner groove portions 54a that are recessed inward from both ends in the circumferential direction and extend in the axial direction. The groove width along the radial direction of the inner groove portion 54a is larger than the groove width of the outer groove portion 53a. By providing the inner groove portion 54a in the inner wall portion 54, the creeping distance between the coil 40 wound around the insulator 50 and the surface (inner peripheral surface) facing radially inward of the teeth portion 31b can be increased, and the coil 40 and Insulation between the tooth portion 31b and the radially inward facing surface can be ensured.

FIG. 8 is a partial perspective view of a part of the insulator 50. As shown in FIGS. 4 and 8, the upper edge 53b of the outer wall portion 53 is provided with a boss 5 (protrusion, fixing portion) for fixing the busbar unit 6. That is, the insulator 50 has the boss 5. The boss 5 protrudes above a holder main body portion 62, which will be described later, of the bus bar unit 6 located above the insulator 50. The boss 5 extends upward from the upper edge 53b of the outer wall portion 53. The boss 5 has a cylindrical column portion 5a and a retaining portion 5b located at the tip of the column portion 5a. The outer diameter of the column portion 5a is smaller than the inner diameter of the fixing hole 64. The column portion 5a of the boss 5 passes through the fixing hole 64. The retaining portion 5b is formed into a substantially circular shape when viewed from the axial direction by, for example, heat welding or heat caulking the tip of the boss 5. Note that the retaining portion 5b shown in FIGS. 4 and 8 is shown in a state where it is not thermally welded or thermally caulked. Further, the outer diameter of the retaining portion 5b is larger than the width of the notch in the circumferential direction of the fixing hole 64. The retaining portion 5b contacts the upper surface of the flange portion 62b of the holder main body portion 62.

As shown in FIG. 1, the coil 40 consists of a coil wire 41 wound in multiple layers. The plurality of coils 40 are each wound around an insulator 50. The coil 40 is located between the inner wall portion 54 and the outer wall portion 53 in the radial direction. That is, the inner wall portion 54 and the outer wall portion 53 guide the coil 40 from both sides in the radial direction. The inner wall portion 54 and the outer wall portion 53 prevent the coil 40 from separating from the insulator 50 in the radial direction.

As shown in FIG. 2, the coils 40 wound around the insulators 50 that are arranged adjacent to each other in the circumferential direction are adjacent to each other in the slots. The coil 40 is constructed by winding a coil wire 41 in multiple layers. The total number of turns of the coil wire 41 of the coil 40 wound around each insulator 50 is equal. Further, the coil wires 41 constituting each coil 40 are of the same type, and the magnetic flux density of the magnetic field generated by each coil 40 is approximately equal. Here, the "number of turns of the coil wire" for the coil 40 is the local number of turns (i.e., the number of layers) of the coil 40 at a specific position in the radial direction, and refers to the local number of turns (i.e., the number of layers) of the coil 40 as a whole (radially inner This does not mean the total number of turns (the entire area radially outward).

The coil 40 is wound around the insulator 50 and is attached to the teeth portion 31b together with the insulator 50.

As shown in FIG. 2, the plurality of insulating papers 3 are lined up along the circumferential direction. The insulating paper 3 is disposed along the radially inward surface (inner circumferential surface) of the core back portion 31a, with the thickness direction being the radial direction.

As shown in FIGS. 7 and 8, the insulating paper 3 includes an outer insulating paper portion 301 located on the radially outer side of the coil 40, a circumferential insulating paper portion 302 located between the coils 40 in the circumferential direction, and an outer insulating paper portion 302 located between the coils 40 in the circumferential direction. It has a folded part 303 that connects the paper part 301 and the circumferential insulating paper part 302. The insulating paper 3 is constructed by overlapping a pair of circumferential insulating paper parts 302 in the circumferential direction and connecting their radially inner ends with a connecting part 304, and has a T-shape when viewed from the axial direction. ing. The shape of the insulating paper 3 viewed from the axial direction is not limited to the T-shape, but may be an L-shape in which the connecting part 304 is omitted and the outer insulating paper part 301 and the circumferential insulating paper part 302 are connected at the folded part 303. The shapes may be arranged such that the circumferential insulating paper portions 302 face each other in the circumferential direction.

The insulating paper 3 is arranged between the teeth portions 31b adjacent to each other in the circumferential direction. Parts of the ends of the outer insulating paper portions 301 on both sides in the circumferential direction of the insulating paper 3 are supported while being inserted from above into the outer groove portions 53a of the outer wall portions 53 of the circumferentially adjacent insulators 50. Thereby, the insulating paper 3 is sandwiched between the inner circumferential surface of the core back portion 31a and the outer wall portion 53, and movement in the radial direction is restricted. The insulating paper 3 is inserted from above between the inner circumferential surface of the core back portion 31a and the outer wall portion 53.

The insulating paper 3 is arranged in a gap between the outer wall portions 53 of the insulators 50 adjacent to each other in the circumferential direction. Thereby, the creepage distance between the coil 40 wound around the insulator 50 and the core back portion 31a can be increased, and insulation between the coil 40 and the core back portion 31a can be ensured.

Next, the busbar unit 6 will be explained in detail. As shown in FIG. 1, the busbar unit 6 has a cover member 6A disposed on the upper side of two cover members 6A and 6B provided on both sides of the coil 40 in the axial direction, that is, on the upper and lower sides. Equivalent to. Since the lower cover member 6B has substantially the same configuration as the upper cover member 6A, detailed description thereof will be omitted here.

Note that the motor 10 of this embodiment is a three-phase motor. The three phases are U phase, V phase, and W phase. In the case of a three-phase motor, each of the U-phase, V-phase, and W-phase coils 40 is electrically connected to the busbar unit 6.

The busbar unit 6 is located above the stator core 31, as shown in FIGS. 1 to 3. The busbar unit 6 includes a busbar holder 60 and a busbar 70.

FIG. 9 is a longitudinal sectional view of a portion of the stator 30. As shown in FIGS. 4 and 9, the busbar 70 includes an annular busbar main body 71 and a plurality of coil connecting parts 72 that extend from the busbar main body 71 and are electrically connected to the coil lead wire 41c of the coil 40. , is provided. The bus bar 70 is insert molded into the bus bar holder 60.

The bus bar 70 has a bus bar body portion 71 that extends along the circumferential direction. The busbar main body 71 is located radially inward of the outer wall 53 of the insulator 50 and closer to the coil 40 in the axial direction than the end of the outer wall 53. It is manufactured by bending a blank punched with a die.

As shown in FIGS. 4 and 5, the plurality of coil connecting portions 72 are arranged along the circumferential direction. The coil connecting portion 72 has a plate shape with the thickness direction being in the radial direction. The coil connecting portion 72 protrudes upward from the holder main body portion 62 above the coil support portion 63 (described later) in the axial direction and inside the second wide portion 633 in the radial direction. A radially outer connecting surface 72 a of the coil connecting portion 72 is exposed to the coil supporting portion 63 . The coil connecting portion 72 has a rectangular shape that is long in the circumferential direction when viewed from the axial direction.

The bus bar holder 60 has a holder main body part 62, a coil support part 63, and a fixing hole 64. The holder main body 62 holds the busbar main body 71. The holder main body portion 62 has a disk shape centered on the central axis J and along a plane perpendicular to the central axis J. The bus bar holder 60 is made of resin. The coil support portion 63 has a cutout shape that passes through the holder body portion 62 in the axial direction and extends from the outer edge of the holder body portion 62 toward the inside in the radial direction. The coil support portion 63 supports the coil lead wire 41c along the axial direction at its radially inner inner edge. A plurality of coil support parts 63 are provided along the circumferential direction. The fixing hole 64 is fixed to the insulator 50. A plurality of fixing holes 64 are provided.

As shown in FIGS. 1 and 3, the holder main body 62 is located above the coil 40 (on one side in the axial direction) and below the coil leader line 41c (on the other side in the axial direction). The holder main body 62 separates a region where the coil 40 is arranged and a region where the coil lead wire 41c is arranged. The holder main body portion 62 ensures insulation between the coil 40 and the coil lead wire 41c.

As shown in FIGS. 1 and 9, the holder main body 62 extends in the circumferential direction between the outer wall 53 and the inner wall 54 of the insulator 50. As shown in FIGS. Here, the surface of the outer wall portion 53 facing inward in the radial direction is referred to as an inner surface 53c. That is, the insulator 50 has an inner surface 53c facing radially inward. The holder main body portion 62 contacts the inner surface 53c from the inside in the radial direction. Thereby, the bus bar holder 60 supports the inner surface 53c from the radially inner side and suppresses the insulator 50 from moving radially inward.

FIG. 10 is a partial cross-sectional view of a portion of the stator 30. As shown in FIG. As shown in FIGS. 9 and 10, the upper portion of the outer wall portion 53 has an insulator inclined surface 53d that gradually slopes downward as it goes radially inward. The holder main body portion 62 has a holder inclined surface 621 (cover member inclined surface) that gradually slopes downward as it goes radially inward. The insulator inclined surface 53d and the holder inclined surface 621 are provided in a state in which they are in surface contact with each other or in a state in which they are close to each other.

The holder body portion 62 has a flange portion 62b between the circumferentially adjacent coil support portions 63 on the outer peripheral side in the radial direction (see FIG. 4). The flange portion 62b extends radially outward from the holder inclined surface 621. The flange portion 62b has a fixing hole 64 which is a notch that penetrates in the axial direction and extends from the radially outer side to the radially inner side. The flange portion 62b faces the retaining portion 5b of the boss 5 in the axial direction. The boss 5 that protrudes upward from the outer wall portion 53 of the insulator 50 passes through the fixing hole 64 in the axial direction and is fixed thereto. The bus bar holder 60 is fixed to the insulator 50 by, for example, thermally welding or thermally caulking the retaining portion 5b of the boss 5 that penetrates the fixing hole 64.

As shown in FIGS. 4 and 6, the bus bar holder 60 has a holding portion 622 extending downward from the holder main body portion 62. The holding portion 622 is disposed between the coils 40 in the circumferential direction when viewed from the axial direction, and faces the bent portion 303 of the insulating paper 3 inserted into the insulator 50 in the axial direction. The holding portion 622 has a holding surface 622a facing the insulating paper 3 in the axial direction. The pressing surface 622a contacts or approaches the insulating paper 3 from above, and is positioned relative to the insulating paper 3 in the axial direction.

When a current is supplied to the stator 30, a magnetic pole is generated in the coil 40, and a radial magnetic force is applied to the coil 40 and the insulator 50 around which the coil 40 is wound. The insulator 50 of this embodiment is attached to the teeth portion 31b from the inside in the radial direction. Therefore, if a force directed inward in the radial direction is applied to the coil 40 and the insulator 50, there is a possibility that the insulator 50 may come off from the teeth portion 31b. According to this embodiment, the insulator 50 can be fixed to the stator core 31 by restricting the movement of the insulator 50 inward in the radial direction by the busbar unit 6 . Thereby, interference between the insulator 50 and the rotor 20 can be suppressed, and the reliability of the motor 10 can be improved.

According to this embodiment, the outer wall portions 53 of the plurality of insulators 50 are arranged in a ring shape along the circumferential direction, and the bus bar holder 60 fits inside the plurality of outer wall portions 53. Therefore, the insulators 50 located on opposite sides of the central axis J are arranged with the bus bar holder 60 sandwiched between them, and each suppresses movement in the radial direction with the bus bar holder 60 sandwiched therebetween. That is, according to this embodiment, the bus bar holder 60 becomes difficult to move in any direction within a plane orthogonal to the central axis J, and the stability of suppressing the movement of the insulator 50 can be improved.

As shown in FIG. 2, the stator 30 of this embodiment is provided with two cover members 6A and 6B. The two cover members 6A and 6B sandwich the plurality of insulators 50 from above and below. One cover member 6A supports the inner surface 53c of the outer wall portion 53 above the plurality of insulators 50. Further, the lower cover member 6B supports the inner surface 53c of the outer wall portion 53 below the plurality of insulators 50, as shown in FIG. Since the two cover members 6A and 6B support the insulator 50 both above and below, movement of the insulator 50 inward in the radial direction can be stably suppressed.

FIG. 4 is a partial cross-sectional view of the stator 30 orthogonal to the central axis J. As shown in FIGS. 4 and 5, the coil support section 63 and the holder main body section 62 are part of the same single member. The coil support portion 63 has a first wide portion 631, a narrow portion 632, and a second wide portion 633 in order from the outer side to the inner side in the radial direction. The width in the circumferential direction of the first wide portion 631 is larger than the outer diameter of the coil lead wire 41c, that is, the width in the circumferential direction. The first wide portion 631 has a constant width along the direction in which the first wide portion 631 extends. The narrow portion 632 is provided on the radially inner side of the first wide portion 631, and has a circumferential width smaller than the circumferential width of the coil lead wire 41c. The second wide portion 633 is provided inside the narrow portion 632 in the radial direction, and has a circumferential width larger than the circumferential width of the coil lead wire 41c and a circumferential width of the first wide portion 631. smaller than

A coil lead wire 41 c of the coil wire 41 extending from the coil 40 passes through the coil support portion 63 . The coil lead wire 41c extending from the coil 40 may be one that electrically connects the coils 40 to each other, or may be one that is electrically connected to an external power source that supplies power to the stator 30. good.

The coil support portion 63 includes a first coil support portion 63A that supports the coil lead wire 41c at the beginning of winding of the coil 40, and a second coil support portion 63B that supports the coil lead wire 41c at the end of winding of the coil 40. . The first wide portion 631 of the first coil support portion 63A extends in the radial direction when viewed from the axial direction. The first wide portion 631 of the second coil support portion 63B extends obliquely in the circumferential direction with respect to the radial direction when viewed from the axial direction. When viewed from the axial direction, the angle that the second coil support portion 63B makes with the radial direction is larger than the angle that the first coil support portion 63A makes with the radial direction. When viewed from the axial direction, the radially outer opening 631a of the first wide portion 631 in the second coil support portion 63B is located between the circumferentially adjacent outer wall portions 53.

Next, a procedure for assembling the stator 30 will be described based on FIG. 2.
First, the coil wire 41 is wound around the insulator 50 to provide the coil 40. Next, the insulator 50 is attached to the teeth portion 31b from the inside in the radial direction.

Next, as shown in FIG. 12, the lower cover member 6B is attached to the insulator 50 from below. At this time, the boss 5 of the insulator 50 is inserted into the fixing hole 64 of the holder main body part 62, and the boss 5 is heat caulked to provide a retaining part 5b at the tip of the boss 5. Thereby, the lower cover member 6B is fixed to the insulator 50.

Next, the insulating paper 3 is inserted between the inner peripheral surface of the core back portion 31a and the outer wall portion 53 of the insulator 50 from above. Furthermore, the busbar unit 6 (6A) is attached to the insulator 50 from above. At this time, the boss 5 of the insulator 50 is inserted into the fixing hole 64 of the insulator 50, and the boss 5 is heat caulked to provide a retaining portion 5b at the tip of the boss 5. Thereby, the upper busbar unit 6 is fixed to the insulator 50.

When connecting the coil lead wire 41c at the end of winding of the coil 40 to the coil connecting portion 72, the bus bar unit 6 is first placed on the insulator 50. At this time, the coil lead wire 41c supported within the second coil support portion 63B is bent radially outward of the bus bar 70 and temporarily released. After the bus bar 70 is thermally welded to the insulator 50, the coil lead wire 41c is brought close to the coil connection portion 72 and electrically connected by resistance welding. After the busbar unit 6 is placed on the insulator 50 in this way, when returning the coil lead wire 41c to the position where it is connected to the coil connecting portion 72, the second coil support portion does not overlap the outer wall portion 53 of the insulator 50 in the axial direction. 63B, the connection work can be easily performed without interfering with the outer wall portion 53 of the insulator 50.

According to this embodiment, the coil support portion 63 includes a first wide portion 631 that is provided on the outside in the radial direction and has a circumferential width larger than the circumferential width of the coil lead wire 41c; A narrow part 632 is provided on the radially inner side of the coil lead wire 41c and has a width in the circumferential direction that is smaller than the circumferential width of the coil lead wire 41c. It has a second wide portion 633 that is larger than the width of the coil lead wire 41c in the circumferential direction and smaller than the width of the first wide portion 631 in the circumferential direction. The coil support portion 63 includes a first coil support portion 63A that supports the coil lead wire 41c at the beginning of winding of the coil 40, and a second coil support portion 63B that supports the coil lead wire 41c at the end of winding of the coil 40. . At least the first wide portion 631 of the second coil support portion 63B extends obliquely in the circumferential direction with respect to the radial direction when viewed from the axial direction. Therefore, when attaching the bus bar 70 and the bus bar holder 60 to the upper side of the coil 40 after winding the coil 40, the first wide portion 631 of the second coil support portion 63B supports the coil leader wire 41c at the end of winding of the coil 40. are arranged so as to extend obliquely with respect to the radial direction, so that the position on the opening 631a side of the first wide portion 631 can be arranged between the insulators 50 adjacent in the circumferential direction. That is, the coil lead wire 41c at the end of winding of the coil 40 can be avoided and held at a position where it does not overlap the insulator 50 when viewed from the axial direction. Therefore, when assembling the stator 30, the coil lead wire 41c, which makes it difficult to determine the position of the coil lead wire 41c at the end of winding of the coil 40, is passed through the second coil support part 63B that extends diagonally with respect to the radial direction, and the coil lead wire 41c is arranged in the circumferential direction. It can be positioned and held between 50 and 50 degrees.

As described above, in the present embodiment, when assembling the stator 30, the position of the coil lead wire 41c at the end of winding the coil 40 is not determined at a predetermined position, and the coil lead wire 41c becomes a free end and easily moves. However, the coil lead wire 41c at the end of winding of the coil 40 can be electrically connected to the coil connecting portion 72 without contacting the insulator 50, and the distance between the coil connecting portions 72 can be secured, making it easy to weld. Work efficiency can be improved. In other words, the working efficiency does not decrease due to insufficient positioning of the coil lead wire 41c with respect to the coil connecting portion 72 and position adjustment becomes necessary, and the assembly efficiency can be improved.

Furthermore, in this embodiment, by making the second coil support portion 63B oblique with respect to the radial direction, the opening area of the holder main body portion 62 of the bus bar holder 60 can be minimized.

According to this embodiment, when viewed from the axial direction, the angle that the second coil support portion 63B makes with the radial direction is larger than the angle that the first coil support portion 63A makes with the radial direction. As a result, it is possible to increase the circumferential distance between the position of the radial outer circumferential end of the first coil support part 63A and the position of the radial outer circumferential end of the second coil support part 63B. It is possible to prevent the coil lead wire 41c at the end of winding from coming close to each other, and the above-mentioned effects can be sufficiently obtained.

According to this embodiment, an insulator 50 that covers the stator 30 is provided. The insulator 50 has an outer wall portion 53 on the radially outer side of the coil 40 that projects in a direction away from the coil 40 in the axial direction. A plurality of outer wall portions 53 are arranged at intervals in the circumferential direction, and the openings 631a on the radial outer side of the first wide portion 631 in the second coil support portion 63B are adjacent to each other in the circumferential direction when viewed from the axial direction. It is located between the outer wall portions 53. As a result, in the case of the coil lead wire 41c at the beginning of winding of the coil 40, it can be determined at a constant position even if it faces the insulator 50 in the radial direction. may extend to the coil connecting portion 72 on the radially inner side, and may overlap the outer wall portion 53 of the insulator 50. On the other hand, in the case of the coil lead wire 41c at the end of winding of the coil 40, the position does not overlap the outer wall portion 53 of the insulator 50 when viewed from the axial direction, so that the above-mentioned effects can be sufficiently obtained.

According to this embodiment, the coil connecting portion 72 protrudes from the holder body portion 62 toward one axial side on one axial side of the coil support portion 63 and on the radially inner side of the second wide portion 633 . Thereby, the position of the second wide part 633 of the coil support part 63 that supports the coil lead wire 41c and the position of the coil connecting part 72 coincide in the axial direction. Therefore, the coil lead wire 41c supported by the second wide portion 633 can be easily welded to the coil connecting portion 72, and workability can be improved.

According to this embodiment, the coil support portion 63 and the holder main body portion 62 are part of the same single member, and the bus bar 70 is insert-molded in the bus bar holder 60. A radially outer connecting surface 72 a of the coil connecting portion 72 is exposed to the coil supporting portion 63 . Thereby, the coil lead wire 41c and the coil connecting portion 72 can be supported at a position close to each other. That is, since the second wide part is connected to the coil connecting part 72, by fitting the coil lead wire 41c into the second wide part 633 and supporting it, the coil lead wire 41c connects to the coil connecting part 72 at that position. Since the coil lead wire 41c is in contact with the coil connecting portion 72, it is possible to easily connect the coil lead wire 41c to the coil connecting portion 72.

According to this embodiment, an insulator 50 attached to the stator core 31 is provided. The bus bar holder 60 has a holding portion 622 extending from the other axial surface to the other axial side. The holding portion 622 faces the insulating paper 3 inserted into the insulator 50 in the axial direction. Thereby, by attaching the busbar holder 60 to the insulator 50, the pressing portion 622 of the busbar holder 60 can be placed in a position to press the insulating paper 3 from above, and lifting of the insulating paper 3 can be suppressed. In this way, the insulating paper 3 can be prevented from coming off by the simple structure of just providing the holding part 622 on the bus bar holder 60, so the insulating paper 3 can be prevented from coming off without complicating the shape of the insulator 50.

According to the present embodiment, the insulating paper 3 includes an outer insulating paper section 301 located on the radially outer side of the coil 40, a circumferential insulating paper section 302 located between the coils 40 in the circumferential direction, and an outer insulating paper section 301 located between the coils 40 in the circumferential direction. and a circumferential insulating paper portion 302. The holding portion 622 is disposed between the coils 40 in the circumferential direction when viewed from the axial direction, and faces the bent portion 303 in the axial direction. This allows the holding portion 622 to face the folded portion 303 of the insulating paper in the axial direction, thereby more stably preventing the insulating paper 3 from coming off.

According to this embodiment, an insulator 50 attached to the stator core 31 is provided. The insulator 50 includes an insulator body 51 that covers the periphery of the teeth 31b of the stator core 31, and an inner wall 54 that extends in the axial and circumferential directions on the radially inner side of the insulator body 51. The inner wall portion 54 has a pair of inner groove portions 54a that are recessed inward from both ends in the circumferential direction and extend in the axial direction. By providing the inner groove portion 54a in the inner wall portion 54 of the insulator 50, the creeping distance between the high frequency coil 40 wound around the insulator 50 and the inner circumferential surface of the teeth portion 31b of the stator core 31 can be increased. Insulation between the tooth portion 31b and the tooth portion 31b can be ensured.

According to this embodiment, the insulator 50 has an outer wall portion 53 that protrudes in a direction away from the coil 40 in the axial direction on the radially outer side of the coil 40. The outer wall portion 53 has an insulator inclined surface 53d that is inclined in a direction that gradually approaches the coil 40 in the axial direction as it goes radially inward. The bus bar holder 60 has a holder inclined surface 621 that is inclined in a direction that gradually approaches the coil 40 in the axial direction as it goes radially inward. The insulator inclined surface 53d and the holder inclined surface 621 can be in surface contact.Thereby, the holder inclined surface 621 and the insulator inclined surface 53d are in surface contact with each other on their respective surfaces that are inclined with respect to the radial direction, or the respective surfaces are in contact with each other. The surfaces are arranged close to each other and facing each other. When a force is applied to the insulator 50 in a direction that causes it to move radially inward when the motor is driven, the insulator inclined surface 53d contacts the holder inclined surface 621 through surface contact, thereby preventing the insulator 50 from moving radially inward. This prevents the insulator 50 from coming off in the radial direction.

Moreover, in this embodiment, the contact area between the holder inclined surface 621 and the insulator inclined surface 53d is made into a tapered shape, thereby increasing the contact area. , it is possible to disperse the force acting in the radial direction into a component force along the inclined surface and a component force perpendicular to the inclined surface. Therefore, when a force is applied to the insulator 50 in a direction in which the insulator 50 tries to escape in the radial direction when the motor is driven, the radial force that the bus bar holder 60 receives from the insulator 50 can be suppressed, and the surface contact portion of the bus bar holder 60 Damage can be suppressed.

According to this embodiment, the busbar holder 60 holds the busbar 70 that is electrically connected to the end of the coil 40. This prevents the busbar holder 60 from being damaged due to the force that causes the insulator 50 to come off radially inward as described above, so the busbar holder 60 has the function of holding the busbar 70 in addition to the function of preventing the insulator 50 from coming off. It can be made to rest.

According to this embodiment, the busbar 70 has a busbar main body 71 that extends in the circumferential direction. The busbar main body 71 is located radially inward of the outer wall 53 and closer to the coil 40 than the protruding end of the outer wall 53 in the axial direction. This suppresses damage to the busbar holder 60 due to the force that causes the insulator 50 to come off radially inward, allowing the busbar holder 60 to hold the busbar 70. By arranging the busbar main body 71 of the busbar 70 radially inside the insulator inclined surface 53d, the space between the coil 40 and the busbar holder 60 in the axial direction is efficiently utilized, and the axial dimension of the stator 30 is suppressed. It is possible to achieve miniaturization.

<Modified example>
Next, the configuration of the stator 30A according to a modified example will be described. FIG. 11 is a plan view of a stator 30A of a modified example. FIG. 12 is a partial perspective view of a part of the stator 30A. FIG. 13 is a partial perspective view of a portion of the stator 30A. FIG. 14 is a perspective view of the coil support section 65. In the stator 30A of this modification, the configuration of the busbar unit 6 is different. Note that in FIGS. 12 and 13, illustration of the coil lead wire 41c located above the busbar unit 6 is omitted.
Components having the same aspects as those in the above-described embodiment are given the same reference numerals, and their explanations will be omitted.

As shown in FIGS. 12 to 14, the bus bar holder 60A of the stator 30A of this modification has a coil support portion 65 disposed below the holder main body portion 62 in the axial direction. The coil support section 65 is separate from the holder main body section 62 and is arranged below the holder main body section 62. In this embodiment, the narrow part 632 and the second wide part 633 of the coil support part 63 are provided in the coil support part 65. The coil support section 65 includes an annular coil support body section 651 that connects the other ends of the plurality of coil support sections 63 in the axial direction, and a fixing section 652 that extends from the coil support body section 651 toward the upper holder body section 62 side. have

The fixing portion 652 has a cylindrical shape. The fixing portion 652 is fixed through a fixing hole 623, which will be described later, of the holder main body portion 62. The fixing part 652 includes a shaft part 652a that is inserted into the fixing hole 623, and a head part 652b that is located on one side of the fixing hole 623 in the axial direction and at least a part of which is located outside the fixing hole 623 when viewed from the axial direction. , has. In this embodiment, the head 652b is a heat-welded portion.

The holder main body part 62 includes an inner wall part 66 that extends from the holder main body part 62 to one side in the axial direction on the radially inner side of the second wide part 633, and an inner wall part 66 that extends from the holder main body part 62 on the radially outer side of the second wide part 633. and an outer wall portion 67 extending from the outer wall portion 67 to one side in the axial direction. The end of the coil lead wire 41c is covered with an adhesive R injected into the space between the holder main body 62, the inner wall 66, and the outer wall 67.

The holder main body portion 62 has a fixing hole 623 passing through it in the axial direction. The fixing hole 623 is located between the inner wall portion 66 and the outer wall portion 67 when viewed from the axial direction. The fixing part 652 of the coil support part 65 passes through the fixing hole 623 and is fixed therein. The fixing part 652 is fixed to the holder main body part 62 between the inner wall part 66 and the outer wall part 67 when viewed from the axial direction.

As shown in FIGS. 11 and 12, the inner circumferential surface 62c of the holder main body 62 facing radially inward has a recess 624 that extends in the axial direction and is recessed from the radially inner end toward the radially outer side. The recess 624 is arranged between the coils 40 in the circumferential direction.

According to this modification, as shown in FIGS. 12 and 13, the coil connecting portion 72 has a rectangular shape that is long in the circumferential direction when viewed from the axial direction, and is a bus bar convex portion that protrudes radially outward from the connecting surface 72a. It has 721. As a result, for example, in the coil support part 63, the narrow part 632 and the second wide part 633 are separate members, and the positions of the coil connecting part 72 and the second wide part 633 are radially outer than the coil connecting part 72. Even in the case where the bus bar convex portion 721 is located in the radial direction, the bus bar convex portion 721 can be arranged to match the second wide portion 633 in the radial direction. Therefore, the coil lead wire 41c supported by the second wide portion 633 can be extended directly upward and brought into contact with the bus bar convex portion 721, which not only facilitates the welding work but also improves welding accuracy.

According to this modification, the busbar holder 60A includes a holder body 62 that holds the busbar body 71, and a coil support that is separate from the holder body 62 and is disposed on the other axial side of the holder body 62. 65. Thereby, the narrow part 632 and the second wide part 633 are provided in the coil support part 65. This makes molding easier by making the coil support section 65 separate from the holder main body section 62.

According to this modification, the coil support section 65 includes an annular coil support body section 651 that connects the other ends of the plurality of coil support sections 63 in the axial direction, and a fixed section that extends from the coil support body section 651 to one side in the axial direction. 652. The holder main body portion 62 has a fixing hole 623 passing through it in the axial direction. The fixing part 652 includes a shaft part 652a that is inserted into the fixing hole 623, and a head part 652b that is located on one side of the fixing hole 623 in the axial direction and at least a part of which is located outside the fixing hole 623 when viewed from the axial direction. , has. Thereby, the coil support portion 65 can be fixed to the holder main body portion 62 via the fixing portion 652 without the coil support portion 65 coming into contact with the stator core 31. Since restrictions on the diameter dimension of the coil support portion 65 are reduced and restrictions on the grounding shape of the coil support portion 65 are also unnecessary, the weight of resin required for molding can be reduced. Further, the head portion of the fixing portion 652 can be fixed to the holder main body portion 62 by heat welding or heat caulking.

According to this modification, the bus bar holder 60A has an inner wall portion 66 extending from the holder main body portion 62 to one side in the axial direction on the radially inner side of the second wide portion 633, and an inner wall portion 66 on the radially outer side of the second wide portion 633. , and an outer wall portion 67 extending from the holder main body portion 62 to one side in the axial direction. The end of the coil lead wire 41c is covered with adhesive R injected into the space formed by the holder main body 62, the inner wall 66, and the outer wall 67. The fixing part 652 is fixed to the holder main body part 62 between the inner wall part 66 and the outer wall part 67 when viewed from the axial direction. Thereby, the fixing part 652 of the coil support part 65 is fixed at a position on the radially inner side of the holder main body part 62 between the inner wall part 54 and the outer wall part 53 when viewed from the axial direction. Therefore, the radial dimension of the coil support portion 65 disposed via the fixing portion 652 at this position can be suppressed to be small.

According to this modification, the fixing part 652 is fixed to the holder main body part 62 by thermal welding. As a result, the fixing hole 623 of the holder main body part 62 is closed by heat welding the head of the fixing part 652 that penetrates the fixing hole 623, so that a hole is formed between the inner wall part 54 and the outer wall part 53. It is possible to suppress the adhesive R injected into the space from leaking to the coil support part 65 side through the fixing hole.

According to this modification, the end of the boss 5 is crimped in the axial direction and fixed to the flange portion 62b. Thereby, the boss 5 can be easily fixed in the axial direction to the flange portion 62b of the holder main body portion 62 by caulking.

According to this modification, the bus bar holder 60A includes a flange portion 62b that extends radially outward from the holder inclined surface 621, and a long hole that axially passes through the flange portion 62b and is long in the radial direction. It has a fixing hole 64 which is a notch extending radially inward from the fixing hole 64 . The outer wall portion 53 of the insulator 50 includes a boss 5 that protrudes in the direction away from the coil 40 in the axial direction and passes through the fixing hole 64. The end of the boss 5 faces the flange portion 62b in the axial direction. Thereby, by passing the boss 5 through the fixing hole 64 of the bus bar holder 60A and axially opposing the end of the boss 5 of the flange portion 62b to the flange portion 62b, the bus bar holder 60A is axially aligned with respect to the insulator 50. It can be fixed to At this time, the fixing hole 64 is a long hole extending in the radial direction or has a notch shape, and the boss 5 is movable in the radial direction. Therefore, the structure is such that no radial force is applied to the boss 5, and damage to the boss 5 can be suppressed.

According to this modification, the bus bar holder 60A has a recess 624 that extends in the axial direction and is recessed from the radially inner end toward the radially outer side. As a result, a plurality of axially extending recesses 624 are provided on the radially inner surface of the bus bar holder 60A, and the volume inside the bus bar holder 60A increases, so that the refrigerant flowing between the rotor 20 and the stator 30 flows. can improve sexual performance.

According to this modification, the recess 624 is arranged between the coils 40 in the circumferential direction when viewed from the axial direction. Accordingly, by providing the recesses 624 at the corners of the insulator 50 and the bus bar 70, the volume of the recesses 624 can be increased, and the above-described effect of increasing the fluidity of the refrigerant can be sufficiently obtained.

According to this modification, the end portion of the boss 5 may have a claw portion that projects in the circumferential direction. The claw portion faces the flange portion 62b in the axial direction. As a result, the boss 5, which is a fixing part, is passed through the fixing hole 64, and the claw part at the end of the boss 5 is caught on the flange part 62b, so that the boss 5 is moved in the axial direction with respect to the flange part 62b of the holder main body part 62. can be easily fixed.

Note that the shape of the fixing hole 64 provided in the flange portion 62b of the holder main body portion 62 may be a long hole 64A that is elongated in the radial direction as shown in FIG. Alternatively, a cutout 64B having an opening on the outside in the radial direction as shown in FIG. 16 may be used.

The embodiments of the present invention and their modifications have been described above, but each configuration and combination thereof in the embodiments and modifications are merely examples, and additions of configurations and modifications may be made without departing from the spirit of the present invention. Omissions, substitutions and other changes are possible. Moreover, the present invention is not limited by the embodiments.

For example, in the above-described embodiment, a motor mounted on a compressor has been described, but a similar configuration may be adopted for a motor mounted on a water pump or an oil pump.

3... Insulating paper, 5... Boss, 10... Motor, 11... Housing, 20... Rotor, 30, 30A... Stator, 31... Stator core, 31a... Core back part, 31b... Teeth part, 40... Coil, 41... Coil wire , 41c... Coil leader wire, 50... Insulator, 53... Outer wall (wall), 53a... Outer groove, 54... Inner wall, 54a... Inner groove, 6... Bus bar unit, 6A, 6B... Cover member, 60 , 60A... bus bar holder, 62... holder body part, 62a... outer edge, 62b... flange part, 63... coil support part, 63A... first coil support part, 63B... second coil support part, 631... first wide part, 631a...Opening part, 632...Narrow width part, 633...Second wide part, 65...Coil support part, 70...Bus bar, 71...Bus bar body part, 72...Coil connection part, CL...Center line, J...Center axis line

Claims (15)

Comprising a stator core, a coil, a bus bar, and a bus bar holder,
The bus bar is
An annular busbar main body,
a coil connecting part extending from the bus bar main body and electrically connected to a coil lead wire of the coil,
The bus bar holder is
a holder body that holds the busbar body;
A cutout shape extends axially through the holder main body and extends radially inward from an outer edge of the holder main body, and supports the coil lead wire along the axial direction at the radially inner inner edge. and a plurality of coil support parts provided in the circumferential direction,
The coil support part is
a first wide portion provided on the outside in the radial direction and having a width in the circumferential direction larger than a width in the circumferential direction of the coil leader wire;
a narrow portion provided on the radially inner side of the first wide portion and having a width in the circumferential direction smaller than a width in the circumferential direction of the coil leader;
a second wide part that is provided radially inside the narrow part and has a circumferential width larger than the circumferential width of the coil leader line and smaller than the circumferential width of the first wide part; and,
The coil support portion includes a first coil support portion that supports the coil lead wire at the beginning of winding of the coil, and a second coil support portion that supports the coil lead wire at the end of winding of the coil,
At least the first wide portion of the second coil support portion extends obliquely in the circumferential direction with respect to the radial direction when viewed from the axial direction.
stator. When viewed from the axial direction, the angle that the second coil support part makes with the radial direction is larger than the angle that the first coil support part makes with the radial direction.
A stator according to claim 1. an insulator covering the stator;
The insulator has a wall portion protruding in a direction away from the coil in the axial direction on a radially outer side of the coil,
A plurality of the wall portions are arranged at intervals in the circumferential direction,
When viewed from the axial direction, a radially outer opening of the first wide portion in the second coil support portion is located between the circumferentially adjacent wall portions.
A stator according to claim 1 or 2. The coil connecting portion protrudes from the holder main body portion to one axial side on one axial side of the coil support portion and on the radially inner side of the second wide portion.
A stator according to any one of claims 1 to 3. The coil support part and the holder main body are part of the same single member,
The bus bar is insert molded in the bus bar holder,
A radially outer surface of the coil connecting portion is exposed to the coil supporting portion.
A stator according to any one of claims 1 to 4. comprising an insulator attached to the stator core,
The bus bar holder has a holding portion extending from the other axial surface to the other axial side,
The holding portion axially faces an insulating paper inserted into the insulator.
A stator according to any one of claims 1 to 5. The insulating paper is
an outer insulating paper portion located on the radially outer side of the coil;
a circumferential insulating paper section located between the coils in the circumferential direction;
a bent portion connecting the outer insulating paper portion and the circumferential insulating paper portion;
has
The pressing portion is disposed between the coils in the circumferential direction when viewed from the axial direction, and faces the bent portion in the axial direction.
A stator according to claim 6. The coil connecting portion has a rectangular shape elongated in the circumferential direction when viewed from the axial direction, and has a bus bar convex portion protruding outward in the radial direction from a radially outer surface.
A stator according to any one of claims 1 to 7. The bus bar holder is
a holder body that holds the busbar body;
a coil support part that is separate from the holder main body and arranged on the other axial side of the holder main body,
The narrow width part and the second wide part are provided in the coil support part,
A stator according to any one of claims 1 to 8. The coil support part is
an annular coil support main body portion connecting the other axial ends of the plurality of coil support portions;
a fixing portion extending from the coil support main body portion to one side in the axial direction;
The holder main body has a fixing hole passing through in the axial direction,
The fixed part is
a shaft portion inserted into the fixing hole;
a head located on one side in the axial direction of the fixing hole, and having at least a portion located outside the fixing hole when viewed from the axial direction;
A stator according to claim 9. The bus bar holder is
an inner wall portion extending from the holder main body portion to one side in the axial direction on the radially inner side of the second wide portion;
an outer wall portion extending from the holder main body portion to one side in the axial direction on the radially outer side of the second wide portion;
An end of the coil leader wire is covered with an adhesive injected into a space formed by the holder main body, the inner wall, and the outer wall,
The fixing portion is fixed to the holder main body between the inner wall and the outer wall when viewed from the axial direction.
A stator according to claim 10. The fixing part is fixed to the holder body part by heat welding.
A stator according to claim 11. comprising an insulator attached to the stator core,
The insulator is
an insulator body that covers the teeth of the stator core;
an inner wall portion extending in the axial direction and the circumferential direction on the radially inner side of the insulator main body;
has
The inner wall portion has a pair of inner groove portions that are recessed inward from both ends in the circumferential direction and extend in the axial direction.
A stator according to any one of claims 1 to 12. A stator according to any one of claims 1 to 13,
An electric compressor motor comprising a rotor rotatably provided with respect to the stator,
The bus bar holder has a recess that extends in the axial direction and is recessed from the radially inner end toward the radially outer side.
motor. The recess is disposed between the coils in the circumferential direction when viewed from the axial direction.
The motor according to claim 14.

Images