Stator for rotary electric machine and manufacturing method for the same

Abstract

To facilitate the insertion of an insulating member into a slot and to suppress the generation of eddy currents in a coil caused by leakage magnetic flux.SOLUTION: An insulating member 40 has a recessed part 70 into which a mounting projection 66 of an insertion jig 60 is inserted. The recessed part 70 has a first opening part 73 and a second opening part 74. The first opening part 73 and the second opening part 74 make it possible to slide the mounting projections 66 into the recessed part 70 from the inner side of a yoke 16 in the radial direction. The inner surface of the recessed part 70 has an inner surface 72a of a wide recessed part 72 that restricts the movement of the yoke 16 in both circumferential directions in the mounting protrusions 66 inserted into the recessed part 70 and a connecting inner surface 72b of the wide recessed part 72 that restricts the movement of an end surface 61 of the jig on the mounting protrusion 66 inserted into the recessed part 70 away from an insulating member end surface 45.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] The present invention relates to a stator of a rotating electrical machine and a method for manufacturing the stator of a rotating electrical machine.

Background Art

[0002] For example, as disclosed in Patent Document 1, a stator of a rotating electrical machine includes a stator core and a coil. The stator core has a cylindrical yoke and a plurality of teeth. The plurality of teeth extend radially inward from the inner peripheral surface of the yoke. And slots are formed in the stator core between adjacent teeth in the circumferential direction of the yoke. The coil is formed by winding a winding passing through the slots around each tooth in a concentrated winding manner. Further, the stator of the rotating electrical machine includes a columnar insulating member. The insulating member is disposed between adjacent coils in the circumferential direction of the yoke within the slot. And the insulating member insulates between adjacent coils in the circumferential direction of the yoke within the slot.

[0003] The teeth have a tooth extending portion and a pair of tooth flange portions. The tooth extending portion extends from the inner peripheral surface of the yoke. The pair of tooth flange portions project from both sides in the circumferential direction of the yoke from the tooth extending portion. The tooth extending portion has a tooth side surface located in the circumferential direction of the yoke. The tooth side surface partitions the slot. The tooth flange portion has a tooth flange surface. The tooth flange surface extends from the tooth side surface to the tip of the tooth flange portion. The tooth flange surface partitions the slot.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in the stator of such a rotating electrical machine, there may be a leakage magnetic flux that passes between adjacent coils in the circumferential direction of the yoke from the inner circumferential surface of the yoke and flows toward each tooth flange portion of the teeth. At this time, for example, it is assumed that a part of the coil exists on the tooth flange surface at each tooth flange portion. In this case, the leakage magnetic flux that passes between adjacent coils in the circumferential direction of the yoke from the inner circumferential surface of the yoke and flows toward the tooth flange portion may flow through the coil existing on the tooth flange surface. Then, eddy currents are generated in the coil existing on the tooth flange surface, so that the coil existing on the tooth flange surface generates heat. When the coil generates heat in this way, the output of the rotating electrical machine decreases.

[0006] Therefore, the insulating member has a support surface that is supported by each of the tooth flange portions adjacent in the circumferential direction of the yoke in a state of straddling the slot opening, which is the gap between the tooth flange portions adjacent in the circumferential direction of the yoke. And the insulating member supports the coil in a state where the coil is disposed outside the yoke in the radial direction rather than at the boundary between the tooth side surface and the tooth flange surface in the teeth. According to this, a part of the coil does not exist on the tooth flange surface. Therefore, even if a leakage magnetic flux that passes between adjacent coils in the circumferential direction of the yoke from the inner circumferential surface of the yoke and flows toward the tooth flange portion is generated, it is suppressed that the leakage magnetic flux flows through a part of the coil. As a result, the generation of eddy currents in the coil due to the leakage magnetic flux is suppressed.

[0007] When inserting such an insulating member into the slot, the insulating member interferes with the winding of the coil. Therefore, since it is difficult to insert the insulating member into the slot, the manufacturing process of the stator is complicated. Therefore, in order to make it easier to insert the insulating member into the slot, it is conceivable to form the end portion of the insulating member in the axial direction of the yoke into a tapered shape with a pointed tip by gradually narrowing the widths on both sides in the circumferential direction of the yoke on the support surface. According to this, when inserting the insulating member into the slot, the end portion of the insulating member having a tapered shape with a pointed tip is inserted into the slot while scraping aside the winding, so that it is possible to make it easier to insert the insulating member into the slot.

[0008] However, if the end of the insulating member has a tapered shape with a pointed tip, it becomes difficult to support the coil in a state where the coil is disposed outside the yoke in the radial direction beyond the boundary between the tooth side surface and the tooth collar surface in the teeth at the end of the insulating member. Therefore, it is desired to make it easy to insert the insulating member into the slot and to suppress the generation of eddy currents in the coil due to leakage magnetic flux.

Means for Solving the Problem

[0009] The stator of a rotating electrical machine that solves the above problems has a cylindrical yoke and a plurality of teeth extending radially inward from the inner peripheral surface of the yoke, and a stator core in which slots are formed between adjacent teeth in the circumferential direction of the yoke, a coil formed by winding a winding passing through the slots around each tooth in concentrated winding, and a columnar insulating member disposed between adjacent coils in the circumferential direction within the slots and extending in the axial direction of the yoke to insulate between adjacent coils in the circumferential direction. The teeth have a tooth extending portion extending from the inner peripheral surface of the yoke and a pair of tooth flange portions protruding from both sides in the circumferential direction of the yoke from the tooth extending portion. The tooth extending portion has a tooth side surface located in the circumferential direction and partitioning the slot. The tooth flange portion has a tooth flange surface extending from the tooth side surface to the tip of the tooth flange portion and partitioning the slot. The insulating member has a support surface supported by each of the adjacent tooth flange portions in the circumferential direction in a state of straddling a slot opening which is a gap between adjacent tooth flange portions in the circumferential direction. The insulating member is a stator of a rotating electrical machine that supports the coil in a state where the coil is disposed outside the radial direction from a boundary portion between the tooth side surface and the tooth flange surface in the tooth. The axial length of the insulating member is equal to or greater than the axial length of the stator core. On an insulating member end surface which is an end surface located in the axial direction of the insulating member, a tapered insertion jig having a pointed tip is attachable, where the width on both sides in the circumferential direction of a surface continuous with the support surface gradually narrows as it moves away from the insulating member end surface. The insulating member has a recess into which a mounting protrusion protruding from a jig end surface facing the insulating member end surface in the insertion jig is inserted. The recess has a first opening opening at a portion overlapping the slot opening in the radial direction on the support surface, and a second opening communicating with the first opening, opening at the insulating member end surface, and extending in the radial direction from the support surface. The first opening and the second opening enable the mounting protrusion to be slidably inserted into the recess from the inner side in the radial direction. The inner surface of the recess isA circumferential-direction restricting surface that restricts movement of the mounting protrusion inserted into the recess in both circumferential directions, and an axial-direction restricting surface that restricts movement of the jig end surface of the mounting protrusion inserted into the recess in a direction away from the end surface of the insulating member.

[0010] According to this, the mounting protrusion of the insertion jig is slidably inserted into the recess from the inner side in the radial direction of the yoke through the first opening and the second opening, so that the insertion jig is attached to the end surface of the insulating member of the insulating member. When the insulating member is inserted into the slot, the insertion jig having a tapered shape with a pointed tip is inserted into the slot while scraping the winding. At this time, the circumferential-direction restricting surface restricts movement of the mounting protrusion inserted into the recess in both circumferential directions. Further, the axial-direction restricting surface restricts movement of the jig end surface of the mounting protrusion inserted into the recess in a direction away from the end surface of the insulating member. Furthermore, the surface continuous with the support surface in the insertion jig is supported by the tooth flange portions adjacent to each other in the circumferential direction of the yoke. Therefore, even if a load is applied to the insertion jig from the winding while the insertion jig is being inserted into the slot while scraping the winding, the mounting protrusion does not fall out of the recess. Therefore, by using the insertion jig, it is possible to easily and stably insert the insulating member into the slot.

[0011] And the first opening of the recess opens at a portion that overlaps with the slot opening on the support surface of the insulating member in the radial direction of the yoke. Therefore, after the insulating member is inserted into the slot, the mounting protrusion can be pulled out radially inward of the yoke through the first opening and the slot opening. In this way, after the insertion of the insulating member into the slot is completed, the insertion jig can be removed from the insulating member. And the axial length of the yoke in the insulating member is equal to or greater than the axial length of the yoke in the stator core. Thus, the insulating member supports the coil in a state where the coil is disposed radially outside the yoke from the boundary between the tooth side surface and the tooth flange surface in the teeth. According to this, a part of the coil does not exist on the tooth flange surface. Therefore, even if leakage magnetic flux is generated that passes between adjacent coils in the circumferential direction from the inner peripheral surface of the yoke and flows toward the tooth flange portion, it is suppressed that the leakage magnetic flux flows through a part of the coil. As a result, the generation of eddy current in the coil due to the leakage magnetic flux is suppressed. As described above, it is possible to facilitate the insertion of the insulating member into the slot and suppress the generation of eddy current in the coil due to the leakage magnetic flux.

[0012] In the stator of the rotating electric machine, the insulating member may have a first coil support surface that supports one of the coils adjacent in the circumferential direction in the slot and a second coil support surface that supports the other of the coils adjacent in the circumferential direction in the slot, and communication holes that communicate the recess and the inside of the slot may be opened in the first coil support surface and the second coil support surface.

[0013] According to this, for example, when filling the recess with a resin having higher thermal conductivity than the insulating member, the air in the recess is discharged into the slot through each communication hole. Therefore, it is possible to avoid the formation of an air pocket in the recess. Furthermore, when filling the recess with resin, a part of the resin flowing into the recess flows into the slot through each communication hole. Thereby, the resin can be efficiently poured into the slot. Therefore, the slot can also be efficiently filled with resin.

[0014] A method for manufacturing a stator of a rotating electrical machine for solving the above problems includes a stator core having a cylindrical yoke and a plurality of teeth extending radially inward from the inner peripheral surface of the yoke, with slots formed between adjacent teeth in the circumferential direction of the yoke, a coil formed by concentrically winding a winding passing through the slots around each tooth, and a columnar insulating member disposed between adjacent coils in the circumferential direction within the slots and extending in the axial direction of the yoke to insulate between adjacent coils in the circumferential direction. The teeth have a tooth extending portion extending from the inner peripheral surface of the yoke and a pair of tooth flange portions protruding from both sides in the circumferential direction of the yoke from the tooth extending portion. The tooth extending portion has a tooth side surface located in the circumferential direction and partitioning the slot, and the tooth flange portion has a tooth flange surface extending from the tooth side surface to the tip of the tooth flange portion and partitioning the slot. The insulating member has a support surface supported by each of the adjacent tooth flange portions in the circumferential direction in a state straddling a slot opening which is a gap between adjacent tooth flange portions in the circumferential direction. The insulating member is a method for manufacturing a stator of a rotating electrical machine that supports the coil in a state where the coil is disposed radially outside of a boundary portion between the tooth side surface and the tooth flange surface in the tooth, and an end surface in the axial direction of the insulating member, where the axial length of the insulating member is equal to or greater than the axial length of the stator core, has a tapered shape with a pointed tip where the widths on both sides in the circumferential direction of a surface continuous with the support surface gradually narrow as the distance from the insulating member end surface increases. The method includes an attachment step of attaching an insertion jig having such a tapered shape to the insulating member end surface, an insertion step of inserting the insulating member into the slot using the insertion jig after the attachment step, and a removal step of removing the insertion jig from the insulating member after the insertion step. In the attachment step, an attachment protrusion protruding from a jig end surface facing the insulating member end surface in the insertion jig is inserted into a recess of the insulating member. The recess has a first opening opening at a portion overlapping the slot opening in the radial direction on the support surface, communicates with the first opening, opens at the insulating member end surface, andThis is performed by sliding and inserting from the inner side in the radial direction into a second opening extending in the radial direction from the support surface. In the insertion step, the circumferential-direction regulating surface on the inner surface of the recess restricts movement of the mounting protrusion inserted into the recess to both sides in the circumferential direction, and the axial-direction regulating surface on the inner surface of the recess restricts movement of the jig end surface of the mounting protrusion inserted into the recess in a direction away from the end surface of the insulating member while the insertion is being performed. The removal step is performed by pulling out the mounting protrusion radially inward through the first opening and the slot opening.

Advantages of the Invention

[0015] According to this invention, it is possible to facilitate insertion of the insulating member into the slot, and it is possible to suppress generation of eddy currents in the coil due to leakage magnetic flux.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Best Mode for Carrying Out the Invention

[0017] Hereinafter, an embodiment in which the stator of a rotating electrical machine and a method for manufacturing the stator of a rotating electrical machine are embodied will be described with reference to FIGS. 1 to 10. <Outline of Rotating Electrical Machine> As shown in FIG. 1, the rotating electrical machine 10 includes a stator 11 and a rotor 12. The stator 11 is cylindrical. The rotor 12 is disposed inside the stator 11. The rotor 12 has a cylindrical rotor core 13 and a plurality of permanent magnets (not shown) embedded in the rotor core 13. The rotor core 13 is fixed to the rotating shaft 14. The rotor core 13 is configured to be rotatable integrally with the rotating shaft 14.

[0018] <Stator> As shown in FIGS. 1 and 2, the stator 11 of the rotating electrical machine 10 includes a stator core 15, a coil 30, an insulating member 40, and a bobbin 50.

[0019] As shown in FIG. 1, the stator core 15 has a cylindrical yoke 16 and a plurality of teeth 17. The plurality of teeth 17 extend from the inner peripheral surface 16a of the yoke 16 radially inward of the yoke 16. The plurality of teeth 17 are arranged at intervals in the circumferential direction of the yoke 16. Specifically, the plurality of teeth 17 are arranged at equal intervals in the circumferential direction of the yoke 16. Each tooth 17 extends from the inner peripheral surface 16a of the yoke 16 toward the axis L1 of the stator core 15. The tip surface, which is the surface on the side opposite to the yoke 16 in each tooth 17, is an arcuate surface that curves in an arc shape. The tip surfaces of each tooth 17 are located on concentric circles.

[0020] As shown in FIG. 3, the yoke 16 has yoke end faces 16e which are end faces respectively located on both axial sides of the yoke 16 in the yoke 16. Each yoke end face 16e is in a flat surface shape. Each tooth 17 has tooth end faces 17e which are end faces respectively located on both axial sides of the yoke 16 in the tooth 17. Each tooth end face 17e is in a flat surface shape. The length of the yoke 16 in the axial direction of the yoke 16 is the same as the length of each tooth 17 in the axial direction of the yoke 16. The yoke end face 16e and each tooth end face 17e are located on the same plane. The yoke end face 16e and each tooth end face 17e form core end faces 15e which are end faces respectively located on both axial sides of the yoke 16 in the stator core 15.

[0021] Each tooth 17 has a tooth extending portion 18 and a pair of tooth flange portions 19. The tooth extending portion 18 extends from the inner peripheral surface 16a of the yoke 16. The tooth extending portion 18 is a portion that extends from the inner peripheral surface 16a of the yoke 16 in the tooth 17. The pair of tooth flange portions 19 project from the tips located at the ends on the side opposite to the yoke 16 in the tooth extending portion 18 to both sides in the circumferential direction of the yoke 16.

[0022] In the stator core 15, slots 20 are formed between the teeth 17 adjacent to each other in the circumferential direction of the yoke 16. A slot opening 21 which is a gap between the tooth flange portions 19 adjacent to each other in the circumferential direction of the yoke 16 communicates with the slot 20. The slot opening 21 is a space between the tips in the extending direction from the tooth extending portion 18 in the tooth flange portions 19 adjacent to each other in the circumferential direction of the yoke 16.

[0023] As shown in FIG. 4, the tooth extending portion 18 has a tooth side surface 18a. The tooth side surfaces 18a are respectively located on both circumferential sides of the yoke 16 in the tooth extending portion 18. Each tooth side surface 18a is continuous with the inner circumferential surface 16a of the yoke 16. Each tooth side surface 18a demarcates each slot 20. Each tooth flange portion 19 has a tooth flange surface 19a. Each tooth flange surface 19a is continuous with the end portion of the tooth side surface 18a on the side opposite to the inner circumferential surface 16a of the yoke 16. Each tooth flange surface 19a extends from the tooth side surface 18a to the tip of the tooth flange portion 19. The end portion of the tooth side surface 18a on the side opposite to the inner circumferential surface 16a of the yoke 16 is also the boundary portion 22 between the tooth side surface 18a and the tooth flange surface 19a in the tooth 17. In other words, the end portion of the tooth flange surface 19a on the side opposite to the tip of the tooth flange portion 19 is also the boundary portion 22 between the tooth side surface 18a and the tooth flange surface 19a in the tooth 17. Each tooth flange surface 19a extends in an arcuate curve from the boundary portion 22 and then extends in a flat surface shape to the tip of the tooth flange portion 19. Each tooth flange surface 19a demarcates each slot 20. The slot 20 is a space defined by a part of the inner circumferential surface 16a of the yoke 16, the tooth side surface 18a, and the tooth flange surface 19a.

[0024] As shown in FIGS. 1 and 2, the coil 30 is formed by winding the winding 31 passing through the slot 20 around each tooth 17 in a concentrated winding manner. Thus, the coil 30 is wound around the stator core 15. A part of the coil 30 is located inside the slot 20. As shown in FIG. 2, a part of the coil 30 is the coil end 32 protruding from the core end face 15e. Therefore, the coil 30 is formed by winding the winding 31 passing through the slot 20 around each tooth 17 in a concentrated winding manner and includes the coil end 32 protruding from the core end face 15e of the stator core 15.

[0025] <Bobbin> As shown in Fig. 3, the stator 11 includes two bobbins 50. Each bobbin 50 is disposed opposite to each core end face 15e. The bobbin 50 has a cylindrical yoke cover portion 51, a plurality of teeth cover portions 52, and a plurality of slot insulating portions 53. The yoke cover portion 51 faces the yoke 16 in the axial direction of the yoke 16. The yoke cover portion 51 is in the form of a thin plate. The yoke cover portion 51 is in the form of a flat plate. The outer diameter of the yoke cover portion 51 is smaller than the outer diameter of the yoke 16. The inner diameter of the yoke cover portion 51 is the same as the inner diameter of the yoke 16. The yoke cover portion 51 is in surface contact with the yoke end face 16e.

[0026] The plurality of teeth cover portions 52 extend radially inward from the inner peripheral edge 51a of the yoke cover portion 51 toward the yoke 16. Each teeth cover portion 52 faces each tooth 17 in the axial direction of the yoke 16. Each teeth cover portion 52 is in the form of a thin plate. Each teeth cover portion 52 is in the form of a flat plate. Each teeth cover portion 52 is in surface contact with the tooth end face 17e of each tooth 17. As shown in Fig. 2, each teeth cover portion 52 insulates between the coil end 32 and each tooth end face 17e.

[0027] As shown in Fig. 3, each slot insulating portion 53 is in the form of a thin plate that is curved in a substantially U shape along a part of the inner peripheral surface 16a of the yoke 16 forming the slot 20, the tooth side surface 18a, and the tooth flange surface 19a. Each slot insulating portion 53 is continuous with the yoke cover portion 51 and the teeth cover portions 52. Each slot insulating portion 53 extends in the axial direction of the yoke 16 from the yoke cover portion 51 and the teeth cover portions 52. The axial length of the yoke 16 in each slot insulating portion 53 is half of the axial length of the yoke 16 in the yoke 16. Each slot insulating portion 53 of both bobbins 50 is inserted into each slot 20. The tip ends of each slot insulating portion 53 of both bobbins 50 are butted against each other within each slot 20. Thereby, the portion of the coil 30 located within each slot 20 and the stator core 15 are insulated by each slot insulating portion 53.

[0028] <Insulating member> As shown in FIGS. 1 and 2, the insulating member 40 is inserted into each slot 20. Therefore, the insulating member 40 is disposed in each slot 20. The insulating member 40 has a triangular prism shape. The insulating member 40 is made of resin. The insulating member 40 is disposed between adjacent coils 30 in the circumferential direction of the yoke 16 within the slot 20. The insulating member 40 extends in the axial direction of the yoke 16 within the slot 20 to insulate between adjacent coils 30 in the circumferential direction of the yoke 16. The insulating member 40 is disposed in the slot 20 in a state where the longitudinal direction of the insulating member 40 coincides with the axial direction of the yoke 16. Therefore, the longitudinal direction of the insulating member 40 is also the axial direction of the yoke 16 in the insulating member 40.

[0029] As shown in FIG. 2, an insulating member end face 45, which is an end face of the insulating member 40 located in the axial direction of the yoke 16, protrudes from each of both core end faces 15e of the stator core 15. Therefore, the axial length of the yoke 16 in the insulating member 40 is longer than the axial length of the yoke 16 in the stator core 15. Therefore, the axial length of the yoke 16 in the insulating member 40 is equal to or greater than the axial length of the yoke 16 in the stator core 15.

[0030] As shown in FIG. 4, the insulating member 40 has a first coil support surface 41, a second coil support surface 42, a support surface 43, and an outer peripheral end face 44. The first coil support surface 41 is a surface located on one side of adjacent coils 30 in the circumferential direction of the yoke 16 within the slot 20. The second coil support surface 42 is a surface located on the other side of adjacent coils 30 in the circumferential direction of the yoke 16 within the slot 20.

[0031] The first coil support surface 41 supports one of the coils 30 adjacent in the circumferential direction of the yoke 16 within the slot 20. The first coil support surface 41 is in contact with one of the coils 30 adjacent in the circumferential direction of the yoke 16 within the slot 20. The second coil support surface 42 supports the other of the coils 30 adjacent in the circumferential direction of the yoke 16 within the slot 20. The second coil support surface 42 is in contact with the other of the coils 30 adjacent in the circumferential direction of the yoke 16 within the slot 20.

[0032] The first coil support surface 41 and the second coil support surface 42 support the coil 30 in a state where the coil 30 is disposed radially outside of the yoke 16 than the boundary portion 22 of the teeth 17. Therefore, the insulating member 40 supports the coil 30 in a state where the coil 30 is disposed radially outside of the yoke 16 than the boundary portion 22 of the teeth 17.

[0033] The first coil support surface 41 and the second coil support surface 42 are curved surfaces extending in an arc shape that is recessed in a direction approaching each other. The first coil support surface 41 and the second coil support surface 42 extend toward the inner peripheral surface 16a of the yoke 16 while approaching each other from the boundary portion 22 of the teeth 17 around which the winding 31 of the corresponding coil 30 is wound.

[0034] The support surface 43 connects the end portion located on the side opposite to the inner peripheral surface 16a of the yoke 16 on the first coil support surface 41 and the end portion located on the side opposite to the inner peripheral surface 16a of the yoke 16 on the second coil support surface 42. The support surface 43 is rectangular in shape when viewed in plan. A part of the support surface 43 extends along the tooth flange surface 19a. The support surface 43 extends in the slot 20 so as to straddle the slot opening 21. The support surface 43 closes the slot opening 21 from the slot 20 side. Therefore, a part of the support surface 43 faces the inside of the slot opening 21. The support surface 43 is supported by each tooth flange portion 19. The support surface 43 is supported by each of the tooth flange portions 19 adjacent to each other in the circumferential direction of the yoke 16 in a state of straddling the slot opening 21. Therefore, the insulating member 40 is supported by each tooth flange portion 19. Thereby, the coil 30 is pressed outward in the radial direction of the yoke 16 by the first coil support surface 41 and the second coil support surface 42.

[0035] The outer peripheral end surface 44 connects the first coil support surface 41 and the second coil support surface 42 on the inner peripheral surface 16a side of the yoke 16. The outer peripheral end surface 44 connects the end portion located on the inner peripheral surface 16a side of the yoke 16 on the first coil support surface 41 and the end portion located on the inner peripheral surface 16a side of the yoke 16 on the second coil support surface 42.

[0036] <Insertion jig> As shown in FIGS. 5 and 6, an insertion jig 60 can be attached to the insulating member end surface 45 of the insulating member 40. The insertion jig 60 has a jig end surface 61 facing the insulating member end surface 45. The jig end surface 61 is in the shape of a flat surface. The jig end surface 61 has the same shape as the shape of the insulating member 40 when viewed in plan from the axial direction of the yoke 16.

[0037] The insertion jig 60 has a first curved surface 62, a second curved surface 63, and an outer peripheral end surface 64. The first curved surface 62 is a surface continuous with the first coil support surface 41 of the insulating member 40. The first curved surface 62 extends along the first coil support surface 41. The second curved surface 63 is a surface continuous with the second coil support surface 42 of the insulating member 40. The second curved surface 63 extends along the second coil support surface 42. The outer peripheral end surface 64 is a surface continuous with the outer peripheral end surface 44 of the insulating member 40. The outer peripheral end surface 64 extends along the outer peripheral end surface 44 of the insulating member 40.

[0038] The insertion jig 60 has a continuous surface 65 which is a surface continuous with the support surface 43 of the insulating member 40. The continuous surface 65 extends along the support surface 43. The continuous surface 65 is located on the same plane as the support surface 43 when the insertion jig 60 is attached to the insulating member end surface 45 of the insulating member 40. As the continuous surface 65 moves away from the insulating member end surface 45, the widths on both sides in the circumferential direction of the yoke 16 gradually narrow. And the tip located on the side opposite to the insulating member end surface 45 of the continuous surface 65 is pointed. The continuous surface 65 is isosceles triangular in plan view. The first curved surface 62 and the second curved surface 63 are continuous with the continuous surface 65. Thus, the insertion jig 60 has a tapered shape with a pointed tip due to the widths on both sides in the circumferential direction of the yoke 16 gradually narrowing on the surface continuous with the support surface 43 as it moves away from the insulating member end surface 45.

[0039] As shown in FIG. 7, the insertion jig 60 has a mounting projection 66. The mounting projection 66 protrudes from the jig end surface 61. Therefore, the mounting projection 66 protrudes from the jig end surface 61 facing the insulating member end surface 45 in the insertion jig 60.

[0040] The mounting projection 66 has a narrow-width portion 67 and a wide-width portion 68. The narrow-width portion 67 is in the shape of a long rectangular prism. The narrow-width portion 67 protrudes from the jig end face 61. The narrow-width portion 67 is continuous with the jig end face 61. The narrow-width portion 67 is continuous with the continuous surface 65. The narrow-width portion 67 protrudes from the jig end face 61 such that the longitudinal direction of the narrow-width portion 67 coincides with the direction toward the outer peripheral end face 64 as it moves away from the continuous surface 65. The surface of the narrow-width portion 67 located on the continuous surface 65 side is flat. The surface of the narrow-width portion 67 located on the continuous surface 65 side is located on the same plane as the continuous surface 65. The surface of the narrow-width portion 67 located on the side opposite to the continuous surface 65 is flat. The side surfaces 67a of the narrow-width portion 67 located on both sides in the circumferential direction of the yoke 16 extend parallel to each other. Both side surfaces 67a of the narrow-width portion 67 are continuous with the continuous surface 65.

[0041] The wide-width portion 68 spreads to both sides in the circumferential direction of the yoke 16 from the portion of the narrow-width portion 67 on the side opposite to the jig end face 61, so it is wider than the narrow-width portion 67 on both sides in the circumferential direction of the yoke 16. The wide-width portion 68 is in the shape of a long rectangular prism. The longitudinal direction of the wide-width portion 68 coincides with the longitudinal direction of the narrow-width portion 67. The length of the wide-width portion 68 in the longitudinal direction is longer than the length of the narrow-width portion 67 in the longitudinal direction.

[0042] The surface of the wide-width portion 68 located on the continuous surface 65 side is located on the same plane as the surface of the narrow-width portion 67 located on the continuous surface 65 side. Therefore, the mounting projection 66 does not protrude radially inward of the yoke 16 from the continuous surface 65.

[0043] The surface located on the side opposite to the continuous surface 65 in the wide portion 68 is positioned closer to the outer peripheral end surface 64 than the surface located on the side opposite to the continuous surface 65 in the narrow portion 67. Both side surfaces 68a located on both circumferential sides of the yoke 16 in the wide portion 68 extend parallel to each other. Both side surfaces 68a of the wide portion 68 extend parallel to both side surfaces 67a of the narrow portion 67. The wide portion 68 has connection surfaces 68b that connect each side surface 68a of the wide portion 68 and each side surface 67a of the narrow portion 67, respectively. Each connection surface 68b faces the jig end surface 61 in the axial direction of the yoke 16. Each connection surface 68b extends parallel to the jig end surface 61.

[0044] <Recess> As shown in FIG. 8, the insulating member 40 has a recess 70. An attachment protrusion 66 is inserted into the recess 70. The recess 70 has a narrow recess 71 and a wide recess 72. The narrow recess 71 opens to the insulating member end surface 45 and the support surface 43. Therefore, the narrow recess 71 opens to the insulating member end surface 45 and extends in the radial direction of the yoke 16 from the support surface 43. The narrow recess 71 has a rectangular hole shape when viewed in plan from the insulating member end surface 45 side. The narrow recess 71 is formed in the insulating member 40 such that the longitudinal direction of the narrow recess 71 coincides with the direction toward the outer peripheral end surface 44 as it separates from the support surface 43. Inner surfaces 71a located on both circumferential sides of the yoke 16 in the narrow recess 71 extend parallel to each other. Both inner surfaces 71a of the narrow recess 71 are continuous with the insulating member end surface 45 and the support surface 43, respectively. The width between the two inner surfaces 71a in the circumferential direction of the yoke 16 is slightly wider than the width between both side surfaces 67a of the narrow portion 67 of the attachment protrusion 66 in the circumferential direction of the yoke 16. The depth of the narrow recess 71 from the support surface 43 is slightly deeper than the longitudinal length of the narrow portion 67 of the attachment protrusion 66. Both inner surfaces 71a of the narrow recess 71 form the inner surface of the recess 70.

[0045] The wide recess 72 communicates with the side opposite to the end face 45 of the insulating member in the narrow recess 71. The wide recess 72 extends from the portion on the side opposite to the end face 45 of the insulating member in the narrow recess 71 to both sides in the circumferential direction of the yoke 16, so that it is wider than the narrow recess 71 on both sides in the circumferential direction of the yoke 16. The wide recess 72 opens to the support surface 43. The wide recess 72 has a square hole shape when viewed in plan from the support surface 43 side. The depth of the wide recess 72 from the support surface 43 is deeper than the depth of the narrow recess 71 from the support surface 43. The depth of the wide recess 72 from the support surface 43 is slightly deeper than the longitudinal length of the wide portion 68 of the mounting projection 66.

[0046] Both inner surfaces 72a located on both sides in the circumferential direction of the yoke 16 in the wide recess 72 extend parallel to each other. The width between the both inner surfaces 72a in the circumferential direction of the yoke 16 is slightly wider than the width between both side surfaces 68a of the wide portion 68 of the mounting projection 66 in the circumferential direction of the yoke 16. Both inner surfaces 72a of the wide recess 72 extend parallel to both inner surfaces 71a of the narrow recess 71. Both inner surfaces 72a of the wide recess 72 form the inner surface of the recess 70. The wide recess 72 has connecting inner surfaces 72b that connect each inner surface 72a of the wide recess 72 and each inner surface 71a of the narrow recess 71, respectively. Each connecting inner surface 72b extends parallel to the end face 45 of the insulating member. Each connecting inner surface 72b forms the inner surface of the recess 70.

[0047] As shown in FIGS. 9 and 10, the portion opening to the support surface 43 in the wide recess 72 and the portion opening to the support surface 43 in the narrow recess 71 overlap with the slot opening 21 in the radial direction of the yoke 16. Therefore, the portion opening to the support surface 43 in the wide recess 72 and the portion opening to the support surface 43 in the narrow recess 71 form a first opening 73 that opens to the portion of the recess 70 that overlaps with the slot opening 21 in the radial direction of the yoke 16 on the support surface 43. Thus, the recess 70 has a first opening 73 that opens to the portion of the support surface 43 that overlaps with the slot opening 21 in the radial direction of the yoke 16.

[0048] As shown in FIG. 10, the portion of the narrow recess 71 that opens to the end face 45 of the insulating member communicates with the first opening 73 and opens to the end face 45 of the insulating member, and forms a second opening 74 that extends in the radial direction of the yoke 16 from the support surface 43. Thus, the recess 70 communicates with the first opening 73, opens to the end face 45 of the insulating member, and has a second opening 74 that extends in the radial direction of the yoke 16 from the support surface 43.

[0049] The first opening 73 and the second opening 74 enable the mounting projection 66 to be slidably inserted into the recess 70 from the inner side in the radial direction of the yoke 16. Specifically, when the mounting projection 66 is slidably inserted into the recess 70 from the inner side in the radial direction of the yoke 16, the narrow portion 67 of the mounting projection 66 is guided by the narrow recess 71 with both side surfaces 67a of the narrow portion 67 along both inner surfaces 71a of the narrow recess 71. Further, when the mounting projection 66 is slidably inserted into the recess 70 from the inner side in the radial direction of the yoke 16, the wide portion 68 of the mounting projection 66 is guided by the wide recess 72 with both side surfaces 68a of the wide portion 68 along both inner surfaces 72a of the wide recess 72.

[0050] In a state where the mounting projection 66 is inserted into the recess 70, when the mounting projection 66 attempts to move in one circumferential direction of the yoke 16, one of the both side surfaces 68a of the wide portion 68 of the mounting projection 66 abuts against one of the both inner surfaces 72a of the wide recess 72. In a state where the mounting projection 66 is inserted into the recess 70, when the mounting projection 66 attempts to move in the other circumferential direction of the yoke 16, the other of the both side surfaces 68a of the wide portion 68 of the mounting projection 66 abuts against the other of the both inner surfaces 72a of the wide recess 72. Therefore, both inner surfaces 72a of the wide recess 72 function as circumferential restricting surfaces that restrict the movement of the mounting projection 66 inserted into the recess 70 in both circumferential directions of the yoke 16.

[0051] In a state where the mounting projection 66 is inserted into the recess 70, when the mounting projection 66 attempts to move in a direction in which the jig end face 61 separates from the insulating member end face 45, each connection surface 68b of the wide portion 68 of the mounting projection 66 abuts against each connection inner surface 72b of the wide recess 72. Therefore, each connection inner surface 72b of the wide recess 72 functions as an axial restraint surface that restricts the movement of the mounting projection 66 inserted into the recess 70 in a direction in which the jig end face 61 separates from the insulating member end face 45. Thus, the inner surface of the recess 70 has both inner surfaces 72a of the wide recess 72 that function as circumferential restraint surfaces and each connection inner surface 72b of the wide recess 72 that functions as an axial restraint surface.

[0052] <Communication hole> As shown in FIG. 4, the insulating member 40 is formed with communication holes 75. The communication holes 75 are formed one by one in the first coil support surface 41 and the second coil support surface 42. Each communication hole 75 communicates the recess 70 with the inside of the slot 20. Thus, communication holes 75 that communicate the recess 70 with the inside of the slot 20 are open in the first coil support surface 41 and the second coil support surface 42.

[0053] <Resin> The stator 11 includes a resin 76. The resin 76 covers the stator core 15 and the coil 30. A part of the resin 76 is also filled in the slot 20. The resin 76 has higher thermal conductivity than the insulating member 40. Examples of the resin 76 include those in which ceramic particles or glass fibers are mixed with an epoxy resin. A part of the resin 76 is filled in the recess 70. Therefore, the recess 70 is filled with the resin 76 having higher thermal conductivity than the insulating member 40.

[0054] <Manufacturing method of stator of rotating electrical machine> Next, a manufacturing method of the stator 11 of the rotating electrical machine 10 will be described. Here, among the manufacturing methods of the stator 11 of the rotating electrical machine 10, the steps performed when inserting the insulating member 40 into the slot 20 will be described.

[0055] As shown in FIGS. 5 and 6, first, an attachment step of attaching the insertion jig 60 to the end face 45 of the insulating member 40 of the insulating member 40 is performed. The attachment step is performed by sliding and inserting the attachment projection 66 of the insertion jig 60 from the inner side in the radial direction of the yoke 16 with respect to the first opening 73 and the second opening 74.

[0056] As shown in FIG. 9, after the attachment step, an insertion step of inserting the insulating member 40 into the slot 20 using the insertion jig 60 is performed. Thus, when inserting the insulating member 40 into the slot 20, the insertion jig 60 having a tapered shape with a pointed tip is inserted into the slot 20 while scraping aside the winding 31.

[0057] The insertion step is performed while restricting the movement of the attachment projection 66 in the circumferential direction of the yoke 16 on both sides of the attachment projection 66 inserted into the recess 70 by both inner surfaces 72a of the wide recess 72. Further, the insertion step is performed while restricting the movement of the jig end face 61 of the attachment projection 66 inserted into the recess 70 in the direction away from the insulating member end face 45 by each connecting inner surface 72b of the wide recess 72. Furthermore, the continuous surface 65 of the insertion jig 60 is supported by the adjacent tooth collar portions 19 in the circumferential direction of the yoke 16. Therefore, even if a load is applied to the insertion jig 60 from the winding 31 when the insertion jig 60 is being inserted into the slot 20 while scraping aside the winding 31, the attachment projection 66 does not fall out of the recess 70.

[0058] As shown in FIG. 10, after the insertion step, a removal step of removing the insertion jig 60 from the insulating member 40 is performed. The first opening 73 of the recess 70 opens at a portion that overlaps with the slot opening 21 in the support surface 43 of the insulating member 40 in the radial direction of the yoke 16. Therefore, the removal step is performed by pulling out the attachment projection 66 inward in the radial direction of the yoke 16 through the first opening 73 and the slot opening 21. In this way, after the insertion into the slot 20 in the insulating member 40 is completed, the insertion jig 60 is removed from the insulating member 40. Thus, in the manufacturing process of the stator 11 of the rotating electrical machine 10, there are an attachment step, an insertion step, and a removal step.

[0059] [Operation of the Embodiment] Next, the operation of the embodiment will be described. As indicated by the arrows in FIG. 4, in the stator 11 of such a rotating electrical machine 10, there may be a case where a leakage magnetic flux φ1 flows from the inner peripheral surface 16a of the yoke 16 through between the adjacent coils 30 in the circumferential direction of the yoke 16 toward each tooth collar portion 19 of the teeth 17. At this time, for example, if a part of the coil 30 exists on the tooth collar surface 19a of each tooth collar portion 19, the leakage magnetic flux φ1 that flows from the inner peripheral surface 16a of the yoke 16 through between the adjacent coils 30 in the circumferential direction of the yoke 16 toward the tooth collar portion 19 may flow through the coil 30 existing on the tooth collar surface 19a. Also, as indicated by the arrows in FIG. 4, depending on the rotational position of the rotor 12, there may be a case where a leakage magnetic flux φ2 flows from one of the adjacent tooth collar portions 19 in the circumferential direction of the yoke 16 across the slot opening 21 to the other. At this time, for example, if a part of the coil 30 exists on the tooth collar surface 19a of each tooth collar portion 19, the leakage magnetic flux φ2 that flows from one of the adjacent tooth collar portions 19 in the circumferential direction of the yoke 16 across the slot opening 21 to the other may flow through the coil 30 existing on the tooth collar surface 19a. Then, eddy currents are generated in the coil 30 existing on the tooth collar surface 19a, so that the coil 30 existing on the tooth collar surface 19a generates heat. When the coil 30 generates heat in this way, the output of the rotating electrical machine 10 decreases.

[0060] Therefore, the insulating member 40 supports the coil 30 in a state where the coil 30 is disposed radially outside the yoke 16 from the boundary portion 22 of the teeth 17. And the axial length of the yoke 16 in the insulating member 40 is equal to or greater than the axial length of the yoke 16 in the stator core 15. For this reason, a part of the coil 30 does not exist on the tooth flange surface 19a. Therefore, even if leakage flux φ1 that passes between the coils 30 adjacent to each other in the circumferential direction of the yoke 16 from the inner peripheral surface 16a of the yoke 16 and flows toward the tooth flange portion 19 is generated, the leakage flux φ1 is suppressed from flowing through a part of the coil 30. Also, even if leakage flux φ2 that flows from one of the tooth flange portions 19 adjacent to each other in the circumferential direction of the yoke 16 across the slot opening 21 to the other is generated, the leakage flux φ2 is suppressed from flowing through a part of the coil 30. As a result, the generation of eddy currents in the coil 30 associated with the leakage fluxes φ1 and φ2 is suppressed.

[0061] [Effects of the Embodiment] In the embodiment, the following effects can be obtained. (1) By sliding and inserting the mounting protrusion 66 of the insertion jig 60 into the recess 70 through the first opening 73 and the second opening 74 from the inner side in the radial direction of the yoke 16, the insertion jig 60 is attached to the end face 45 of the insulating member of the insulating member 40. Then, when inserting the insulating member 40 into the slot 20, the insertion jig 60 having a tapered shape with a pointed tip is inserted into the slot 20 while scraping aside the winding 31. At this time, both inner surfaces 72a of the wide recess 72 restrict the movement of the mounting protrusion 66 inserted into the recess 70 to both sides in the circumferential direction. Further, each connecting inner surface 72b of the wide recess 72 restricts the movement of the jig end face 61 of the mounting protrusion 66 inserted into the recess 70 in the direction away from the end face 45 of the insulating member. Furthermore, the continuous surface 65, which is a surface continuous with the support surface 43 of the insertion jig 60, is supported by the tooth flange portions 19 adjacent to each other in the circumferential direction of the yoke 16. Therefore, even if a load is applied to the insertion jig 60 from the winding 31 when the insertion jig 60 is being inserted into the slot 20 while scraping aside the winding 31, the mounting protrusion 66 does not fall out of the recess 70. Therefore, by using the insertion jig 60, it is possible to easily and stably insert the insulating member 40 into the slot 20.

[0062] And the first opening 73 of the recess 70 opens at a portion that radially overlaps with the slot opening 21 on the support surface 43 of the insulating member 40 and the yoke 16. Therefore, after the insulating member 40 is inserted into the slot 20, the mounting protrusion 66 can be pulled radially inward of the yoke 16 through the first opening 73 and the slot opening 21. In this way, after the insertion of the insulating member 40 into the slot 20 is completed, the insertion jig 60 can be removed from the insulating member 40. And the axial length of the yoke 16 in the insulating member 40 is equal to or greater than the axial length of the yoke 16 in the stator core 15. Thus, the insulating member 40 supports the coil 30 in a state where the coil 30 is disposed radially outside the yoke 16 than the boundary portion 22 of the teeth 17. According to this, a part of the coil 30 does not exist on the tooth flange surface 19a. Therefore, even if a leakage magnetic flux φ1 is generated that passes between the coils 30 adjacent to each other in the circumferential direction of the yoke 16 from the inner peripheral surface 16a of the yoke 16 and flows toward the tooth flange portion 19, it is suppressed that the leakage magnetic flux φ1 flows through a part of the coil 30. As a result, the generation of eddy currents in the coil 30 due to the leakage magnetic flux φ1 is suppressed. As described above, it is possible to facilitate the insertion of the insulating member 40 into the slot 20 and suppress the generation of eddy currents in the coil 30 due to the leakage magnetic flux φ1.

[0063] (2) Communication holes 75 that communicate the recess 70 and the inside of the slot 20 are opened in the first coil support surface 41 and the second coil support surface 42. According to this, for example, when filling the recess 70 with a resin 76 having higher thermal conductivity than the insulating member 40, the air in the recess 70 is discharged into the slot 20 through each communication hole 75. Therefore, it is possible to avoid the formation of an air pocket in the recess 70. Furthermore, when filling the recess 70 with the resin 76, a part of the resin 76 that has flowed into the recess 70 flows into the slot 20 through each communication hole 75. Thereby, the resin 76 can be efficiently poured into the slot 20. Therefore, the slot 20 can also be efficiently filled with the resin 76.

[0064] (3) When the stator core 15 and the coil 30 are coated with the resin 76, stress may be applied from the resin 76 to the end face 45 of the insulating member. At this time, since the concave portion 70 is formed in the insulating member 40, the insulating member 40 is easily bent. Therefore, since the stress applied from the resin 76 to the end face 45 of the insulating member can be relaxed, it is possible to avoid the insulating member 40 from being damaged.

[0065] (4) The mounting projection 66 does not project radially inward of the yoke 16 from the continuous surface 65. Therefore, when the insulating member 40 is inserted into the slot 20 using the insertion jig 60, it is possible to avoid the mounting projection 66 from interfering with the winding 31. Thus, it is possible to avoid the mounting projection 66 from interfering with the winding 31 and the mounting projection 66 from falling off from the concave portion 70.

[0066] [Modification Example] Note that the above embodiment can be modified and implemented as follows. The above embodiment and the following modification examples can be implemented in combination with each other as long as they do not technically conflict with each other.

[0067] ○ In the embodiment, the communication holes 75 may not be opened in the first coil support surface 41 and the second coil support surface 42. ○ In the embodiment, the concave portion 70 may not be filled with the resin 76.

[0068] ○ In the embodiment, the stator 11 may be configured not to include the resin 76. ○ In the embodiment, the shape of the concave portion 70 and the shape of the mounting projection 66 are not particularly limited. In short, the concave portion 70 has the first opening 73 and the second opening 74, and the first opening 73 and the second opening 74 may be configured such that the mounting projection 66 can be slidably inserted into the concave portion 70 from the radially inner side of the yoke 16. And the inner surface of the concave portion 70 may be configured to have a circumferential regulating surface and an axial regulating surface.

[0069] ○ In the embodiment, the insulating member 40 may be configured such that the first coil support surface 41 and the second coil support surface 42 do not extend toward the inner peripheral surface of the yoke 16 while approaching each other from the boundary portion 22 of the teeth 17 around which the winding 31 of the corresponding coil 30 is wound. In short, the insulating member 40 may be configured to support the coil 30 in a state where the coil 30 is disposed radially outside of the yoke 16 than the boundary portion 22 of the teeth 17, as long as it can support the coil 30.

[0070] ○ In the embodiment, the insulating member 40 does not have to be triangular prism-shaped. In short, the insulating member 40 may be columnar. ○ In the embodiment, the axial length of the yoke 16 in the insulating member 40 may be the same as the axial length of the yoke 16 in the stator core 15.

[0071] ○ In the embodiment, the bobbin 50 may be configured not to have a plurality of slot insulating portions 53. In this case, the stator 11 may be configured to separately include a slot insulating sheet that insulates the portion of the coil 30 located in each slot 20 and the stator core 15 from the bobbin 50.

Description of Reference Numerals

[0072] 10... Rotating electrical machine, 11... Stator, 15... Stator core, 16... Yoke, 16a... Inner peripheral surface, 17... Teeth, 18... Teeth extending portion, 18a... Teeth side surface, 19... Teeth flange portion, 19a... Teeth flange surface, 20... Slot, 21... Slot opening, 22... Boundary portion, 30... Coil, 31... Winding, 40... Insulating member, 41... First coil support surface, 42... Second coil support surface, 43... Support surface, 45... Insulating member end surface, 60... Insertion jig, 61... Jig end surface, 66... Mounting projection, 70... Recess, 72a... Inner surface functioning as a circumferential direction regulating surface, 72b... Connecting inner surface functioning as an axial direction regulating surface, 73... First opening, 74... Second opening, 75... Communication hole.

Claims

1. A stator core having a cylindrical yoke and a plurality of teeth extending radially inward from the inner peripheral surface of the yoke, with slots formed between adjacent teeth in the circumferential direction of the yoke; A coil formed by winding a winding passing through the slots around each tooth in concentrated winding; A columnar insulating member disposed between adjacent coils in the circumferential direction within the slots and extending in the axial direction of the yoke to insulate between adjacent coils in the circumferential direction; and The teeth are A tooth extending portion extending from the inner peripheral surface of the yoke; A pair of tooth flange portions protruding from both sides in the circumferential direction of the yoke from the tooth extending portion; and The tooth extending portion has a tooth side surface located in the circumferential direction and partitioning the slot; The tooth flange portion has a tooth flange surface extending from the tooth side surface to the tip of the tooth flange portion and partitioning the slot; The insulating member has a support surface supported by each of the adjacent tooth flange portions in the circumferential direction in a state of straddling a slot opening which is a gap between adjacent tooth flange portions in the circumferential direction; The insulating member is a stator of a rotating electrical machine that supports the coil in a state where the coil is disposed outside the radial direction from a boundary portion between the tooth side surface and the tooth flange surface in the teeth, The axial length of the insulating member is equal to or greater than the axial length of the stator core; On an insulating member end face which is an end face located in the axial direction of the insulating member, a tapered insertion jig with a pointed tip is attachable, where the widths on both sides in the circumferential direction of a surface continuous with the support surface gradually narrow as the distance from the insulating member end face increases; The insulating member has a recess into which a mounting protrusion protruding from a jig end face facing the insulating member end face of the insertion jig is inserted; The recess is A first opening opening at a portion overlapping the slot opening in the radial direction on the support surface; A second opening communicating with the first opening, opening at the insulating member end face, and extending in the radial direction from the support surface; and The first opening and the second opening enable the mounting protrusion to be slidably inserted into the recess from the inner side in the radial direction; The inner surface of the recess is A circumferential-direction restricting surface that restricts movement of the mounting projection inserted into the recess in both circumferential directions; An axial-direction restricting surface that restricts movement of the jig end surface of the mounting projection inserted into the recess in a direction away from the end surface of the insulating member, and a stator of a rotating electrical machine characterized by having the same.

2. The insulating member Has a first coil support surface that supports one of the coils adjacent in the circumferential direction within the slot, And a second coil support surface that supports the other of the coils adjacent in the circumferential direction within the slot, The stator of a rotating electrical machine according to claim 1, characterized in that communication holes that communicate the recess and the inside of the slot are open on the first coil support surface and the second coil support surface.

3. A stator core having a cylindrical yoke and a plurality of teeth extending radially inward from the inner peripheral surface of the yoke, with slots formed between adjacent teeth in the circumferential direction of the yoke, A coil formed by winding a winding passing through the slot around each tooth in concentrated winding, A columnar insulating member disposed between coils adjacent in the circumferential direction within the slot and extending in the axial direction of the yoke to insulate between coils adjacent in the circumferential direction, The teeth Have a tooth extending portion extending from the inner peripheral surface of the yoke, And a pair of tooth flange portions protruding from the tooth extending portion to both circumferential sides of the yoke, The tooth extending portion has a tooth side surface that is located in the circumferential direction and partitions the slot, The tooth flange portion has a tooth flange surface that extends from the tooth side surface to the tip of the tooth flange portion and partitions the slot, The insulating member has a support surface supported by each of the tooth flange portions adjacent in the circumferential direction in a state of straddling a slot opening that is a gap between the tooth flange portions adjacent in the circumferential direction, A method for manufacturing a stator of a rotating electrical machine, wherein the insulating member supports the coil in a state where the coil is disposed outside the radial direction from a boundary portion between the tooth side surface and the tooth flange surface in the tooth. An attachment step of attaching an insertion jig having a tapered shape with a pointed tip, in which the width on both sides in the circumferential direction of the surface continuous with the support surface gradually narrows as it moves away from the insulating member end face, which is the end face in the axial direction of the insulating member and where the length of the insulating member in the axial direction is equal to or greater than the length of the stator core in the axial direction, to the insulating member end face; An insertion step of inserting the insulating member into the slot using the insertion jig after the attachment step; A removal step of removing the insertion jig from the insulating member after the insertion step, and the attachment step is performed by sliding and inserting a mounting projection protruding from a jig end face facing the insulating member end face of the insertion jig into a recess of the insulating member, the recess having a first opening that opens at a portion overlapping the slot opening in the radial direction on the support surface, and a second opening that communicates with the first opening, opens at the insulating member end face, and extends in the radial direction from the support surface, from the inner side in the radial direction; the insertion step is performed while restricting movement of the mounting projection inserted into the recess to both sides in the circumferential direction by a circumferential restriction surface of the inner surface of the recess, and restricting movement of the jig end face of the mounting projection inserted into the recess in a direction away from the insulating member end face by an axial restriction surface of the inner surface of the recess; the removal step is performed by pulling out the mounting projection inward in the radial direction through the first opening and the slot opening, and a method for manufacturing a stator of a rotating electrical machine is characterized in that.

Images