Stator and method for manufacturing stator

Abstract

A stator comprises: a stator core; an insulating member (30) that insulates the stator core from the axial direction of the stator core; an insulating sheet (50) that insulates the stator core from an orthogonal direction that is orthogonal to the axial direction of the stator core; a holding structure (60) that holds the insulating sheet at a predetermined normal position with respect to the stator core; and a winding portion that is wound around the stator core with the insulating member and the insulating sheet interposed therebetween.

Description

Stator and method for manufacturing the same CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is based on and claims the benefit of priority from Japanese Patent Application No. 2024-128935, filed on August 5, 2024, the entire contents of which are incorporated herein by reference.

[0002] The technology of the present disclosure relates to a stator and a method for manufacturing the stator.

[0003] Conventionally, there is a stator that includes a stator core, an insulating member that insulates the stator core from the axial direction of the stator core, an insulating sheet that insulates the stator core from an orthogonal direction perpendicular to the axial direction of the stator core, and a winding winding portion wound around the stator core via the insulating member and the insulating sheet (see, for example, JP 2018-198515 A).

[0004] As a result of detailed studies by the inventors, the following problem was discovered. In the above-described stator, an insulating member and an insulating sheet are attached to the stator core, and then the winding winding portion is wound around the stator core with the insulating member and insulating sheet interposed therebetween. Here, when the insulating sheet is attached in a predetermined correct position with respect to the stator core after the winding winding portion is wound, the insulation provided by the insulating sheet is ensured. However, if the insulating sheet is displaced from the correct position with respect to the stator core, the insulation provided by the insulating sheet may be impaired. Since the insulating sheet often displaces from the correct position with respect to the stator core when the winding winding portion is wound, it is necessary to prevent the insulating sheet from displacing from the correct position with respect to the stator core when the winding winding portion is wound.

[0005] The technology disclosed herein aims to provide a stator and a method for manufacturing a stator that can prevent an insulating sheet from shifting from its correct position relative to the stator core when winding a winding portion.

[0006] A first aspect of the technology of the present disclosure is a stator comprising a stator core, an insulating member that insulates the stator core from the axial direction of the stator core, an insulating sheet that insulates the stator core from an orthogonal direction perpendicular to the axial direction of the stator core, a holding structure that holds the insulating sheet in a predetermined regular position relative to the stator core, and a winding winding portion wound around the stator core via the insulating member and the insulating sheet.

[0007] A second aspect of the technology of the present disclosure is a method for manufacturing a stator, comprising: an attachment process for attaching to the stator core an insulating member that insulates the stator core from the axial direction of the stator core and an insulating sheet that insulates the stator core from a direction perpendicular to the axial direction of the stator core; a holding process for holding the insulating sheet in a predetermined correct position relative to the stator core using a holding structure that holds the insulating sheet in the correct position relative to the stator core; and a winding process for winding a winding portion around the stator core via the insulating member and the insulating sheet.

[0008] The techniques disclosed herein provide a stator and a method for manufacturing a stator that can prevent an insulating sheet from shifting from its normal position relative to a stator core when winding a winding portion.

[0009] 1. A cross-sectional view of a stator according to the first embodiment. A cross-sectional view of a stator component according to the first embodiment. A perspective view of the stator component according to the first embodiment. A diagram illustrating a first half of an assembly process for the stator component according to the first embodiment. A diagram illustrating a second half of an assembly process for the stator component according to the first embodiment. An exploded perspective view of an insulator and a core member according to the first embodiment. A cross-sectional view of an enlarged main part of the stator according to the first embodiment. A side view of an enlarged main part of the stator component according to the first embodiment. A plan view of an enlarged main part of the stator component according to the first embodiment. A perspective view of an enlarged main part of the insulator and a core member according to the first embodiment. A diagram illustrating the configuration of the insulator and the core member according to the first embodiment. A perspective view of an enlarged periphery of a locking portion according to the first embodiment. A cross-sectional view of the insulator and the core member according to the first embodiment. A perspective view of the insulator and the core member according to the first embodiment. A flowchart illustrating the flow of a manufacturing method for the stator according to the first embodiment. A side view of an enlarged main part of the stator component according to the second embodiment. A diagram illustrating the configuration of the insulator and the core member according to the second embodiment. FIG. 10 is an enlarged perspective view of a main portion of an insulator and a core member according to a modified example of the second embodiment. FIG. 11 is a diagram showing the configuration of an insulator and a core member according to a modified example of the second embodiment. FIG. 12 is an enlarged perspective view of a main portion of an insulator and a core member according to a third embodiment. FIG. 13 is a diagram showing the configuration of an insulator and a core member according to the third embodiment. FIG. 14 is an enlarged perspective view of a main portion of an insulator and a core member according to a fourth embodiment. FIG. 15 is a diagram showing the configuration of an insulator and a core member according to the fourth embodiment. FIG. 16 is an enlarged perspective view of a main portion of an insulator and a core member according to a modified example of the fourth embodiment. FIG. 17 is a diagram showing the configuration of an insulator and a core member according to a modified example of the fourth embodiment. FIG. 18 is an enlarged perspective view of a main portion of an insulator and a core member according to a fifth embodiment. FIG. 19 is a diagram showing the configuration of an insulator and a core member according to the fifth embodiment. FIG. 19 is an enlarged perspective view of a main portion of an insulator and a core member according to a sixth embodiment.FIG. 10 is a diagram showing the configuration of an insulator and a core member according to a sixth embodiment. FIG. 11 is an enlarged perspective view of a main portion of an insulator and a core member according to a seventh embodiment. FIG. 12 is a diagram showing the configuration of an insulator and a core member according to the seventh embodiment. FIG. 13 is an enlarged perspective view of a main portion of an insulator and a core member according to a first modified example of the seventh embodiment. FIG. 14 is an enlarged perspective view of a main portion of an insulator and a core member according to a second modified example of the seventh embodiment. FIG. 15 is an enlarged perspective view of a main portion of an insulator and a core member according to a third modified example of the seventh embodiment. FIG. 16 is an enlarged perspective view of a main portion of an insulator and a core member according to a fourth modified example of the seventh embodiment. FIG. 17 is an enlarged perspective view of a main portion of an insulator and a core member according to a fifth modified example of the seventh embodiment. FIG. 18 is an enlarged perspective view of a main portion of an insulator and a core member according to a sixth modified example of the seventh embodiment. FIG. 19 is an enlarged perspective view of a main portion of an insulator and a core member according to a seventh modified example of the seventh embodiment. FIG. 19 is an enlarged perspective view of a main portion of an insulator and a core member according to an eighth embodiment. FIG. 19 is a plan view of an insulator and a core member according to the eighth embodiment. FIG. 19 is an enlarged cross-sectional view of a main portion of a stator according to a ninth embodiment.

[0010] First Embodiment First, a first embodiment of the technology of the present disclosure will be described.

[0011] As shown in Fig. 1, the stator 10 includes a plurality of stator components 12. The stator 10 is configured by combining the plurality of stator components 12 in an annular shape. Fig. 1 shows the configuration of half of the stator 10. The stator 10 is applied to an inner rotor type brushless motor in which a rotor (not shown) is disposed inside the stator 10.

[0012] In each figure, the X direction indicates the tangential direction of the stator 10, the Y direction indicates the radial direction of the stator 10, and the Z direction indicates the axial direction of the stator 10. In the following description, the circumferential direction of the stator 10 refers to the direction around the central axis of the stator 10. The tangential direction, radial direction, axial direction, and circumferential direction of the stator core 24, which will be described later, are the same directions as the tangential direction, radial direction, axial direction, and circumferential direction of the stator 10, respectively.

[0013] 2, each stator component 12 includes a core member 14, an insulator 16, and a winding winding portion 18. The core member 14 is formed in a T-shape when viewed from the Z direction, and has teeth portions 20 and a core back portion 22. The core back portion 22 extends in the circumferential direction of the stator core 24, and the teeth portions 20 extend inward in the Y direction from the center of the core back portion 22.

[0014] The tooth portion 20 has a main body portion 20A and a tip portion 20B. The main body portion 20A of the tooth portion 20 is the portion between the tip portion 20B and the base end portion of the tooth portion 20. The tip portion 20B of the tooth portion 20 is a free end, and the base end portion of the tooth portion 20 is connected to the core back portion 22. The tip portion 20B of the tooth portion 20 is wider in the X direction than the main body portion 20A of the tooth portion 20. The core member 14 is a laminate in which multiple core sheets are stacked in the Z direction.

[0015] A stator core 24 (see FIG. 1) is constructed by combining a plurality of core members 14 in an annular shape. That is, the stator core 24 is formed by a plurality of core members 14 divided into individual tooth portions 20. When the stator core 24 is constructed, the plurality of core back portions 22 form an annular portion 26 (see FIG. 1) that is the outer periphery of the stator core 24, and the plurality of tooth portions 20 extend radially from the center of the stator core 24. Slots 28 are formed between the plurality of tooth portions 20.

[0016] 3, the insulator 16 includes a pair of insulating members 30 and a pair of insulating sheets 50. The insulating members 30 are three-dimensional resin components formed by resin molding. The insulating sheets 50 are resin sheet materials formed into a sheet shape.

[0017] 4, the pair of insulating members 30 are attached to the core member 14 from the Z direction. The pair of insulating sheets 50 are attached to the core member 14 from the Z direction or the X direction, and are disposed between the pair of insulating members 30 in the Z direction. The pair of insulating members 30 and the pair of insulating sheets 50 may be attached to the core member 14 in any order.

[0018] 5 , the winding winding portion 18 is formed by winding the wire around the tooth portion 20 in the Y direction while the winding winding portion insulating portion 56 (described later) is spread out in the X direction. That is, the winding winding portion 18 is wound around the tooth portion 20 via the insulating member 30 and the insulating sheet 50. The winding winding portion insulating portion 56 is bent in the Y direction after the winding winding portion 18 is formed.

[0019] The pair of insulating members 30 are formed symmetrically in the Z direction, and the pair of insulating sheets 50 are formed symmetrically in the X direction. Below, the insulating member 30 located on one side in the Z direction of the pair of insulating members 30 will be described. Similarly, the insulating sheet 50 located on one side in the Z direction of the pair of insulating sheets 50 will be described. Furthermore, the insulating members 30 and the insulating sheets 50 are formed symmetrically in the X direction. Below, the configuration of the insulating members 30 and the insulating sheets 50 on one side in the X direction will be described.

[0020] 6, the insulating member 30 has a first tooth insulating portion 32 that insulates the tooth portion 20 and a first core back insulating portion 34 that insulates the core back portion 22. The first tooth insulating portion 32 has a first main body insulating portion 32A that insulates the main body portion 20A of the tooth portion 20 and a first tip insulating portion 32B that insulates the tip portion 20B of the tooth portion 20. The first core back insulating portion 34 and the first tip insulating portion 32B extend in the X direction relative to the first main body insulating portion 32A (see also FIG. 2).

[0021] The insulating sheet 50 has a second tooth insulating portion 52 that insulates the tooth portions 20, a second core back insulating portion 54 that insulates the core back portions 22, and a winding winding insulating portion 56 that insulates the winding winding portions 18 (see FIG. 7) that are adjacent in the circumferential direction of the stator core 24. Note that FIG. 6 shows the winding winding insulating portion 56 in a state before it is folded (i.e., a state in which it is expanded in the X direction). The second tooth insulating portion 52 has a second main body insulating portion 52A that insulates the main body portions 20A of the tooth portions 20 and a second tip insulating portion 52B that insulates the tip portions 20B of the tooth portions 20. The second core back insulating portion 54 and the second tip insulating portion 52B are folded in the X direction relative to the second main body insulating portion 52A (see also FIG. 2).

[0022] The insulating member 30 insulates the core member 14 from the Z direction and the X direction, and the insulating sheet 50 insulates the core member 14 from the X direction and the Y direction. The X direction and the Y direction are examples of "orthogonal directions orthogonal to the axial direction of the stator core" according to the technology of the present disclosure. The configurations of the insulating member 30 and the insulating sheet 50 will be described in more detail below.

[0023] The first tooth insulating portion 32 of the insulating member 30 is provided between the tooth portion 20 and the winding winding portion 18 in the Z direction, thereby insulating the tooth portion 20 from the Z direction. The first core back insulating portion 34 of the insulating member 30 is provided between the core back portion 22 and the winding winding portion 18 in the Z direction, thereby insulating the core back portion 22 from the Z direction.

[0024] The first main body insulating portion 32A and the first tip insulating portion 32B of the first tooth insulating portion 32 each have an extending portion 38A, 38B extending in the Z direction. The extending portion 38A is provided between the main body portion 20A of the tooth portion 20 and the winding winding portion 18 in the X direction, thereby insulating the main body portion 20A of the tooth portion 20 from the X direction. The extending portion 38B is provided between the tip portion 20B of the tooth portion 20 and the winding winding portion 18 in the Y direction, thereby insulating the tip portion 20B of the tooth portion 20 from the Y direction. The first core back insulating portion 34 has an extending portion 40 extending in the Z direction. The extending portion 40 is provided between the core back portion 22 and the winding winding portion 18 in the Y direction, thereby insulating the core back portion 22 from the Y direction.

[0025] Of the second tooth insulating portions 52 of the insulating sheet 50, the second main body insulating portion 52A is provided between the main body portion 20A of the tooth portion 20 and the winding winding portion 18 in the X direction, thereby insulating the main body portion 20A of the tooth portion 20 from the X direction, and the second tip insulating portion 52B is provided between the tip portion 20B of the tooth portion 20 and the winding winding portion 18 in the Y direction, thereby insulating the tip portion 20B of the tooth portion 20 from the Y direction. The second core back insulating portion 54 of the insulating sheet 50 is provided between the core back portion 22 and the winding winding portion 18 in the Y direction, thereby insulating the core back portion 22 from the Y direction.

[0026] The extension 38A of the first main body insulating portion 32A of the first tooth insulating portion 32 is inserted between the main body portion 20A of the tooth portion 20 and the second main body insulating portion 52A of the second tooth insulating portion 52, and the extension 38B of the first tip insulating portion 32B of the first tooth insulating portion 32 is inserted between the tip portion 20B of the tooth portion 20 and the second tip insulating portion 52B of the second tooth insulating portion 52. The extension 40 of the first core back insulating portion 34 is inserted between the core back portion 22 and the second core back insulating portion 54.

[0027] The extending portion 38A of the first main body insulating portion 32A overlaps with the second main body insulating portion 52A, thereby ensuring a creepage distance along the insulating member 30 and the insulating sheet 50 from the winding winding portion 18 to the main body portion 20A of the tooth portion 20. Similarly, the extending portion 38B of the first tip insulating portion 32B overlaps with the second tip insulating portion 52B, thereby ensuring a creepage distance along the insulating member 30 and the insulating sheet 50 from the winding winding portion 18 to the tip portion 20B of the tooth portion 20. Furthermore, the extending portion 40 of the first core back insulating portion 34 overlaps with the second core back insulating portion 54, thereby ensuring a creepage distance along the insulating member 30 and the insulating sheet 50 from the winding winding portion 18 to the core back portion 22.

[0028] 7 , the winding winding portion insulating portion 56 of the insulating sheet 50 is provided between adjacent winding winding portions 18, thereby insulating the adjacent winding winding portions 18 from each other. The winding winding portion insulating portion 56 has a first bent portion 56A bent toward the second core back portion insulating portion 54 and a second bent portion 56B bent toward the second tooth portion insulating portion 52 (more specifically, the second tip portion insulating portion 52B). The tip portion 56A1 of the first bent portion 56A and the tip portion 56B1 of the second bent portion 56B overlap in the circumferential direction of the stator core 24. The tip portion 56A1 of the first bent portion 56A and the tip portion 56B1 of the second bent portion 56B overlap in the circumferential direction of the stator core 24, thereby ensuring a creepage distance L1 along the insulating sheet 50 between adjacent winding winding portions 18.

[0029] The tip 56B1 of the second bent portion 56B is located between the tip 56A1 of the first bent portion 56A and the winding winding portion 18, but the tip 56A1 of the first bent portion 56A may also be located between the tip 56B1 of the second bent portion 56B and the winding winding portion 18.

[0030] The first tip insulating portion 32B (see FIG. 2) is formed with a winding end portion holder 36 that holds the winding end portion 19 that is continuous with the winding winding portion 18. The winding end portion holder 36 is formed in a concave shape that is recessed in the X direction and penetrates in the Z direction. The winding end portion 19 held by the winding end portion holder 36 extends in the Z direction.

[0031] As shown in Fig. 8 , the second core back insulating portion 54 is formed to be longer in the Z direction than the second tooth insulating portion 52, and the Z direction end of the second core back insulating portion 54 protrudes in the Z direction further than the Z direction end of the second tooth insulating portion 52 (see also Fig. 6 ). As a result, the height of the second core back insulating portion 54 in the Z direction (i.e., the height of the outer side of the insulating sheet 50 in the Y direction) is greater than the height of the second tooth insulating portion 52 (i.e., the height of the inner side of the insulating sheet 50 in the Y direction). The insulation distance L2 between the core back portion 22 and the winding winding portion 18 is ensured by the distance from the Z direction end face of the core back portion 22 to the Z direction end of the second core back insulating portion 54. Additionally, an insulation distance L3 between the tooth portion 20 and the winding winding portion 18 is ensured by the distance from the tip of the extension portions 38A, 38B of the first tooth portion insulating portion 32 to the end portion in the Z direction of the second tooth portion insulating portion 52. Since the height of the second core-back portion insulating portion 54 is greater than the height of the second tooth portion insulating portion 52, the height of the first bent portion 56A is also greater than the height of the second bent portion 56B.

[0032] Incidentally, when the insulating sheet 50 is attached in a predetermined, regular position relative to the core member 14 after the winding portion 18 is wound, the insulation provided by the insulating sheet 50 can be ensured. Specifically, the creepage distance along the insulating member 30 and insulating sheet 50 from the winding portion 18 to the core member 14, and the insulation distance between the core member 14 and the winding portion 18 due to the insulating member 30 and insulating sheet 50, can be ensured. The predetermined, regular position refers to an attachment position of the insulating sheet 50 that ensures the creepage distance and insulation distance as designed. On the other hand, if the insulating sheet 50 is deviated from the regular position relative to the core member 14, the insulation provided by the insulating sheet 50 may be impaired. Specifically, the creepage distance and insulation distance may be insufficient. The insulating sheet 50 often shifts from its normal position relative to the core member 14 when the winding winding section 18 is wound, so it is necessary to prevent the insulating sheet 50 from shifting from its normal position relative to the core member 14 when winding the winding winding section 18.

[0033] Therefore, the stator 10 according to the first embodiment includes a retaining structure 60 that retains the insulating sheet 50 in a predetermined, correct position relative to the core member 14 to prevent the insulating sheet 50 from shifting from its correct position relative to the core member 14 when the winding winding portion 18 is wound. The retaining structure 60 will be described in detail below. In the following, to make it easier to understand the overall configuration of the retaining structure 60, the reference numerals of the components that make up the retaining structure 60 will be followed by "(50)," which is the reference numeral for the retaining structure 60, in each drawing.

[0034] As shown in FIGS. 9 and 10 , the holding structure 60 has a locking portion 62 formed on the insulating member 30 and a locked portion 64 formed on the insulating sheet 50. The locking portion 62 is formed on the first core back insulating portion 34 of the insulating member 30, and the locked portion 64 is formed on the second core back insulating portion 54 of the insulating sheet 50. In the X direction, the locking portion 62 is formed closer to the first tooth insulating portion 32 (more specifically, the first main body insulating portion 32A) than the end of the first core back insulating portion 34 (see also FIG. 11 ). The distance from the end of the first core back insulating portion 34 to the locking portion 62 in the X direction ensures an insulation distance L4 between the core back portion 22 and the winding portion 18 in the X direction. Note that FIG. 10 shows the winding winding portion insulating portion 56 in a state before it is folded (i.e., in a state where it is expanded in the X direction).

[0035] 11 , in the Z direction, the locking portion 62 is formed at a position higher than the first main body insulating portion 32A of the first tooth insulating portion 32. The insulation distance L5 between the core back portion 22 and the winding winding portion 18 is ensured by the distance from the end face of the core back portion 22 to the locking portion 62 in the Z direction.

[0036] The first core-back insulating portion 34 has a first surface 34A on the tooth 20 side and a second surface 34B on the opposite side to the tooth 20. The first surface 34A is the inner surface of the first core-back insulating portion 34 in the Y direction (i.e., the inner peripheral surface), and the second surface 34B is the outer surface of the first core-back insulating portion 34 in the Y direction (i.e., the outer peripheral surface).

[0037] The locking portion 62 is formed on the first surface 34A. That is, the locking portion 62 opens to the first surface 34A. As an example, the locking portion 62 is formed in a concave shape that is recessed outward in the Y direction from the first surface 34A. The locking portion 62 also opens to one side in the Z direction. The locking portion 62 has a protruding portion 66 that protrudes to one side in the Z direction. The protruding portion 66 is formed in a tapered shape such that the thickness in the Y direction decreases toward one side in the Z direction (see also FIG. 12 ).

[0038] The locked portion 64 is formed in a tongue shape and extends from one end of the second core back portion insulating portion 54 in the Z direction toward the other end in the Z direction. The locked portion 64 is bent outward in the Y direction and inserted inside the locking portion 62. The locked portion 64 is locked with the locking portion 62. Specifically, the locked portion 64 is locked in the X direction with the X direction surface of the locking portion 62, locked in the Y direction with the Y direction surface of the locking portion 62 and the protrusion 66, and locked in the Z direction with the Z direction surface of the locking portion 62. The Z direction is an example of an "axial direction" according to the technology of the present disclosure, and the X direction and Y direction are examples of "orthogonal directions" according to the technology of the present disclosure.

[0039] 13 , the first core-back insulating portion 34 and the first tip insulating portion 32B extend in the X direction relative to the first main body insulating portion 32A, and the second core-back insulating portion 54 and the second tip insulating portion 52B are bent in the X direction relative to the second main body insulating portion 52A. The bending angles of the second core-back insulating portion 54 and the second tip insulating portion 52B are set larger than the angle (e.g., 90°) formed by the first core-back insulating portion 34 and the first tip insulating portion 32B with the first main body insulating portion 32A. As a result, the insulating sheet 50 is held in the insulating member 30 by the springback forces F1 and F2 of the second core-back insulating portion 54 and the second tip insulating portion 52B. That is, the holding structure 60 has a first structure 68 in which the second core-back portion insulating portion 54 is pressed against the first core-back portion insulating portion 34 by a spring-back force F1 relative to the second main body portion insulating portion 52A, and a second structure 70 in which the second tip portion insulating portion 52B is pressed against the first tip portion insulating portion 32B by a spring-back force F2 relative to the second main body portion insulating portion 52A. Note that Fig. 13 shows the state before the winding winding portion insulating portion 56 is folded (i.e., the state in which it is spread in the X direction).

[0040] 13 and 14 , the holding structure 60 has a holding portion 72 formed in the first tip insulating portion 32B of the insulating member 30 and a held portion 74 formed in the second tip insulating portion 52B of the insulating sheet 50. More specifically, the holding portion 72 has a holding groove 76, a first side wall portion 78 formed on the winding winding portion 18 side of the holding groove 76, and a second side wall portion 80 formed on the tip portion 20B side of the tooth portion 20 on the holding groove 76. The holding groove 76 extends along the tip portion 20B of the tooth portion 20.

[0041] The first side wall portion 78 and the second side wall portion 80 are formed like walls extending with the Z direction as the height direction. Corners 78A, 80A (see FIG. 14 ) at the upper ends of the first side wall portion 78 and the second side wall portion 80 facing the holding groove 76 are formed with inclined or curved surfaces so as to widen the opening of the holding groove 76. The held portion 74 of the insulating sheet 50 is inserted into the holding groove 76 and thereby held in the Z direction and the Y direction. Specifically, the held portion 74 is held in the Z direction by the bottom surface of the holding groove 76, and is held in the Y direction (specifically, toward the winding portion 18 and the tip portions 20B of the teeth 20) by the first side wall portion 78 and the second side wall portion 80.

[0042] Next, a manufacturing method of the stator 10 will be described. As shown in FIG. 15 , the manufacturing method of the stator 10 includes a mounting process, a holding process, a winding process, a bending process, and an assembly process. The mounting process includes mounting the insulating member 30 and the insulating sheet 50 to the core member 14. The holding process includes engaging the locked portion 64 with the locking portion 62 and holding the insulating sheet 50 to the insulating member 30 using springback forces F1 and F2 of the second core back portion insulating portion 54 and the second tip portion insulating portion 52B, thereby holding the insulating sheet 50 in the correct position relative to the core member 14. The winding process includes winding the winding portion 18 around the teeth 20 of the core member 14 via the insulating member 30 and the insulating sheet 50, with the winding portion insulating portion 56 spread in the X direction. The bending process includes bending the winding portion insulating portion 56 in the Y direction after winding the winding portion 18. The assembly process includes annularly assembling the core members 14 and the insulating members 30. Through the above processes, the stator 10 is manufactured.

[0043] As described above in detail, in the first embodiment, the holding structure 60 holds the insulating sheet 50 in a predetermined correct position relative to the core member 14. Therefore, when the winding winding portion 18 is wound, it is possible to prevent the insulating sheet 50 from shifting from its correct position relative to the core member 14. This ensures the insulation provided by the insulating sheet 50. Specifically, it is possible to ensure the creepage distance along the insulating member 30 and insulating sheet 50 from the winding winding portion 18 to the core member 14, and the insulation distance between the core member 14 and the winding winding portion 18 provided by the insulating member 30 and insulating sheet 50.

[0044] Furthermore, the holding structure 60 has a locking portion 62 formed on the insulating member 30 and a locked portion 64 formed on the insulating sheet 50, and the locked portion 64 is locked to the locking portion 62 in the X, Y, and Z directions. Therefore, it is possible to prevent the insulating sheet 50 from shifting from its correct position relative to the core member 14 in the X, Y, and Z directions.

[0045] Furthermore, the locking portions 62 are formed on the first core back insulating portion 34, and the locked portions 64 are formed on the second core back insulating portion 54. Therefore, compared to a case where the locking portions 62 are formed on the first tooth insulating portion 32 and the locked portions 64 are formed on the second tooth insulating portion 52, for example, it is possible to prevent the locking portions 62 and the locked portions 64 from interfering with the winding portion 18, thereby ensuring workability when winding the winding portion 18.

[0046] The first core-back insulating portion 34 has a first surface 34A on the tooth 20 side and a second surface 34B on the opposite side from the tooth 20, and the locking portion 62 is formed on the first surface 34A. Therefore, compared to when the locking portion 62 is formed on the second surface 34B, for example, it is not necessary to route the locked portion 64 all the way to the locking portion 62, and the structure of the insulating sheet 50 can be simplified.

[0047] Furthermore, the locking portion 62 is formed in a concave shape. Therefore, compared to when the locking portion 62 is formed in a convex shape that protrudes from the first surface 34A toward the teeth portion 20, for example, the locking portion 62 is prevented from interfering with the winding winding portion 18, thereby ensuring the space factor of the winding winding portion 18. Furthermore, because the locked portion 64 is formed in a tongue shape, the locked portion 64 can be easily formed by, for example, making a cut in the insulating sheet 50.

[0048] Furthermore, in the Z direction, the locking portion 62 is formed at a position higher than the first main body insulating portion 32A of the first tooth insulating portion 32. This makes it possible to ensure an insulation distance L5 between the core back portion 22 and the winding winding portion 18 by the distance from the end face of the core back portion 22 in the Z direction to the locking portion 62.

[0049] Furthermore, in the Z direction, the height of the second core back portion insulating portion 54 (i.e., the height of the insulating sheet 50 on the outside in the Y direction) is greater than the height of the second teeth portion insulating portion 52 (i.e., the height of the insulating sheet 50 on the inside in the Y direction). As a result, the insulation distance L2 between the core back portion 22 and the winding winding portion 18 can be ensured by the distance from the end face of the core back portion 22 in the Z direction to the end of the second core back portion insulating portion 54 in the Z direction.

[0050] Furthermore, in the X direction, the locking portion 62 is formed at a position closer to the first tooth insulating portion 32 (more specifically, the first main body insulating portion 32A) than to the end of the first core back insulating portion 34. This makes it possible to ensure an insulation distance L4 between the core back portion 22 and the winding winding portion 18 in the X direction by the distance from the end of the first core back insulating portion 34 to the locking portion 62 in the X direction.

[0051] The insulating sheet 50 also has a winding winding portion insulating portion 56 disposed between adjacent winding winding portions 18 in the circumferential direction of the stator core 24. The winding winding portion insulating portion 56 has a first bent portion 56A bent relative to the second core back portion insulating portion 54 and a second bent portion 56B bent relative to the second tooth portion insulating portion 52, and a tip end 56A1 of the first bent portion 56A and a tip end 56B1 of the second bent portion 56B overlap each other. Therefore, for example, compared to when the tip end 56A1 of the first bent portion 56A and the tip end 56B1 of the second bent portion 56B do not overlap each other, a creepage distance along the insulating sheet 50 between adjacent winding winding portions 18 can be ensured.

[0052] The retaining structure 60 has a first structure 68 in which the second core-back insulating portion 54 is pressed against the first core-back insulating portion 34 by a springback force F1 relative to the second main body insulating portion 52A, and a second structure 70 in which the second tip insulating portion 52B is pressed against the first tip insulating portion 32B by a springback force F2 relative to the second main body insulating portion 52A. This makes it possible to more effectively prevent the insulating sheet 50 from shifting from its normal position relative to the core member 14.

[0053] The retaining structure 60 also has a retaining portion 72 formed on the first tip insulating portion 32B and a retained portion 74 formed on the second tip insulating portion 52B, and the retained portion 74 is retained in the Z direction and the Y direction by the retaining portion 72. This more effectively prevents the insulating sheet 50 from shifting from its correct position relative to the core member 14. In particular, the retained portion 74 is retained in the Z direction by the bottom surface of the retaining groove 76, thereby preventing the insulating sheet 50 from moving in the Z direction. Furthermore, the retained portion 74 is retained in the Y direction (specifically, toward the winding winding portion 18 and the tip portions 20B of the teeth 20) by the first side wall portion 78 and the second side wall portion 80, thereby preventing the second tip insulating portion 52B from moving toward the winding winding portion 18 and the rotor.

[0054] In the first embodiment, the stator core 24 is divided into multiple core members 14, and the multiple core members 14 are configured independently of one another. However, the multiple core members 14 may be rotatably connected by a rotary connector with the Z direction as the rotation axis. Furthermore, instead of the multiple core members 14 being rotatably connected by a connector, the multiple insulating members 30 attached to the multiple core members 14 may be rotatably connected by a rotary connector. Furthermore, the multiple core members 14 may be integrally formed, and the multiple insulating members 30 may also be integrally formed. Even with this configuration, the same effects as when the multiple core members 14 and the multiple insulating members 30 are configured independently of one another can be achieved.

[0055] In the first embodiment, the insulator 16 includes a pair of insulating members 30, but one of the pair of insulating members 30 may be omitted. Alternatively, instead of omitting one of the pair of insulating members 30, the pair of insulating sheets 50 may be connected by an insulating connecting portion.

[0056] In addition, in the first embodiment, the height of the second core-back insulating portion 54 is greater than the height of the second tooth insulating portion 52, but as shown in Figure 16, the height of the second tooth insulating portion 52 may be the same as the height of the second core-back insulating portion 54.

[0057] Furthermore, in the first embodiment, the locking portion 62 is formed in a recessed shape, but it may be formed in a hole or groove shape.

[0058] Second Embodiment Next, a second embodiment of the technique of the present disclosure will be described.

[0059] In the second embodiment, the configurations of the locking portion 62 and the locked portion 64 are changed as follows compared to the first embodiment. That is, in the second embodiment, as shown in Figures 17 and 18, the locking portion 62 is formed in a hook shape bent in the Z direction, and the locked portion 64 is formed at an end (a corner, as an example) of the insulating sheet 50. The locked portion 64 is locked with the locking portion 62. Specifically, the locked portion 64 is locked with the tip end 62A of the locking portion 62 in the Y direction and with the base end 62B of the locking portion 62 in the Z direction.

[0060] Even with this configuration, it is possible to prevent the insulating sheet 50 from shifting from its normal position relative to the core member 14 when winding the winding portion 18 .

[0061] Furthermore, the locked portions 64 are formed at the ends of the insulating sheet 50, eliminating the need to make cuts, and thus simplifying the structure of the insulating sheet 50.

[0062] In the second embodiment, the locking portion 62 is formed in a hook shape bent in the Z direction, and the locked portion 64 is formed at an end (a corner, for example) of the insulating sheet 50. However, as shown in FIGS. 19 and 20 , the locking portion 62 may be formed in a hook shape bent in the X direction, and the locked portion 64 may be formed by a protruding piece 82 extending in the Z direction from the end of the insulating sheet 50 and an edge portion 84 extending in the X direction from the base end of the protruding piece 82. The locked portion 64 is locked with the locking portion 62. Specifically, the protruding piece 82 of the locked portion 64 is locked with the tip end 62A of the locking portion 62 in the Y direction and with the base end 62B of the locking portion 62 in the X direction, and the edge portion 84 of the locked portion 64 is locked with the base end 62B of the locking portion 62 in the Z direction.

[0063] Even with this configuration, it is possible to prevent the insulating sheet 50 from shifting from its normal position relative to the core member 14 when winding the winding portion 18 .

[0064] Furthermore, the engaging portion 64 is configured to have a convex piece 82 extending in the Z direction from the end of the insulating sheet 50 and an edge portion 84 extending in the X direction from the base end of the convex piece 82, so the engaging portion 64 can be easily formed by forming the convex piece 82 extending from the edge portion 84 of the insulating sheet 50.

[0065] Third Embodiment Next, a third embodiment of the technique of the present disclosure will be described.

[0066] In the third embodiment, the configurations of the locking portion 62 and the locked portion 64 are changed as follows compared to the first embodiment. That is, in the third embodiment, as shown in Figures 21 and 22, the locking portion 62 is formed in a protrusion shape, and the locked portion 64 is formed in a hole shape in the insulating sheet 50. The locked portion 64 is locked with the locking portion 62 by inserting the locking portion 62 into the inside of the locked portion 64. Specifically, the locked portion 64 is locked with the locking portion 62 in the X direction and the Z direction.

[0067] Even with this configuration, it is possible to prevent the insulating sheet 50 from shifting from its normal position relative to the core member 14 when winding the winding portion 18 .

[0068] Furthermore, since the locked portions 64 are formed in the shape of holes, the locked portions 64 can be easily formed in the insulating sheet 50 .

[0069] In the third embodiment, the locked portion 64 is formed in a hole shape, but it may also be formed in a recess shape.

[0070] Fourth Embodiment Next, a fourth embodiment of the technique of the present disclosure will be described.

[0071] In the fourth embodiment, the configurations of the locking portion 62 and the locked portion 64 are changed as follows compared to the first embodiment. That is, in the fourth embodiment, as shown in Figures 23 and 24, the locking portion 62 is formed in a recessed shape, and the locked portion 64 is formed in a protruding shape. The locked portion 64 is inserted into the inside of the locking portion 62, thereby being locked with the locking portion 62. Specifically, the locked portion 64 is locked with the locking portion 62 in the X direction and the Z direction.

[0072] Even with this configuration, it is possible to prevent the insulating sheet 50 from shifting from its normal position relative to the core member 14 when winding the winding portion 18 .

[0073] Furthermore, the second core back portion insulating portion 54 on which the interlocking portion 64 is formed is pressed against the first core back portion insulating portion 34 by the spring back force F1 relative to the second main body portion insulating portion 52A, thereby preventing the interlocking portion 64 from coming off the interlocking portion 62.

[0074] Furthermore, since the locked portions 64 are formed in a protruding shape, the locked portions 64 can be easily formed on the insulating sheet 50 by punching or the like.

[0075] In the fourth embodiment, the locking portion 62 is formed in a recessed shape, but may be formed in a hole shape.

[0076] 25 and 26, the locking portion 62 may be formed in a keyhole shape with the Z direction as the vertical direction, and the locked portion 64 may be locked to the locking portion 62 so as to be movable in the Z direction.

[0077] Fifth Embodiment Next, a fifth embodiment of the technique of the present disclosure will be described.

[0078] In the fifth embodiment, the configurations of the locking portion 62 and the locked portion 64 are changed as follows compared to the first embodiment. That is, in the fifth embodiment, as shown in Figures 27 and 28, the locking portion 62 is formed in a groove shape extending to one side in the Z direction and outward in the Y direction, and the locked portion 64 is formed in a tongue shape. The locked portion 64 is inserted into the inside of the locking portion 62, thereby being locked with the locking portion 62. Specifically, the locked portion 64 is locked with the locking portion 62 in the X direction, the Y direction, and the Z direction.

[0079] Even with this configuration, it is possible to prevent the insulating sheet 50 from shifting from its normal position relative to the core member 14 when winding the winding portion 18 .

[0080] Furthermore, the locking portions 62 are formed in a groove shape. Therefore, compared to when the locking portions 62 are formed in a convex shape that protrudes from the first surface 34A toward the teeth 20, for example, the locking portions 62 are prevented from interfering with the winding winding portion 18, thereby ensuring the space factor of the winding winding portion 18. Furthermore, the locked portions 64 are formed in a tongue shape, which makes it easy to form the locked portions 64 on the insulating sheet 50.

[0081] Sixth Embodiment Next, a sixth embodiment of the technique of the present disclosure will be described.

[0082] In the sixth embodiment, the configurations of the locking portion 62 and the locked portion 64 are changed as follows compared to the first embodiment. That is, in the sixth embodiment, as shown in Figures 29 and 30, the locking portion 62 is formed, as an example, in a concave shape recessed outward in the Y direction from the first surface 34A. The locking portion 62 has a protruding portion 66 that protrudes toward the first tooth insulating portion 32. The protruding portion 66 is formed in a tapered shape whose thickness in the Y direction decreases toward the first tooth insulating portion 32.

[0083] The locked portion 64 is formed in a tongue shape and extends toward the opposite side of the first tooth insulating portion 32 in the X direction. The locked portion 64 is bent outward in the Y direction and inserted inside the locking portion 62. The locked portion 64 is locked with the locking portion 62. Specifically, the locked portion 64 is locked in the X direction with the X direction surface of the locking portion 62, locked in the Y direction with the Y direction surface of the locking portion 62 and the protrusion 66, and locked in the Z direction with the Z direction surface of the locking portion 62.

[0084] Even with this configuration, it is possible to prevent the insulating sheet 50 from shifting from its normal position relative to the core member 14 when winding the winding portion 18 .

[0085] Furthermore, the locking portion 62 is formed in a concave shape. Therefore, compared to when the locking portion 62 is formed in a convex shape that protrudes from the first surface 34A toward the teeth portion 20, for example, the locking portion 62 is prevented from interfering with the winding winding portion 18, thereby ensuring the space factor of the winding winding portion 18. Furthermore, because the locked portion 64 is formed in a tongue shape, the locked portion 64 can be easily formed by, for example, making a cut in the insulating sheet 50.

[0086] Seventh Embodiment Next, a seventh embodiment of the technique of the present disclosure will be described.

[0087] In the seventh embodiment, the configurations of the locking portion 62 and the locked portion 64 are changed as follows compared to the first embodiment. That is, in the sixth embodiment, as shown in Figures 31 and 32, the locking portion 62 is formed on the second surface 34B. That is, the locking portion 62 opens on the second surface 34B. As an example, the locking portion 62 is formed in a concave shape that is recessed inward in the Y direction from the second surface 34B. The locking portion 62 also opens on one side in the Z direction. The locking portion 62 has a protrusion 66 that protrudes in the X direction.

[0088] The insulating sheet 50 has a routing portion 57 that is routed up to the locking portion 62. The locked portion 64 is formed in a tongue shape at the tip of the routing portion 57. The locked portion 64 is bent to the opposite side of the first tooth insulating portion 32 in the X direction and inserted inside the locking portion 62. The locked portion 64 is locked with the locking portion 62. Specifically, the locked portion 64 is locked in the X direction with the X direction surface of the locking portion 62, locked in the Y direction with the Y direction surface of the locking portion 62 and the protrusion 66, and locked in the Z direction with the Z direction surface of the locking portion 62.

[0089] Even with this configuration, it is possible to prevent the insulating sheet 50 from shifting from its normal position relative to the core member 14 when winding the winding portion 18 .

[0090] Furthermore, the locking portion 62 is formed on the second surface 34B. Therefore, compared to when the locking portion 62 is formed in a convex shape that protrudes from the first surface 34A toward the teeth 20, for example, the locking portion 62 is prevented from interfering with the winding winding portion 18, thereby ensuring the space factor of the winding winding portion 18. Furthermore, because the locked portion 64 is formed in a tongue shape, the locked portion 64 can be easily formed on the insulating sheet 50.

[0091] In the seventh embodiment, the locked portion 64 and the locking portion 62 may be formed in the shapes shown in the second to sixth embodiments. For example, as shown in Fig. 33, the locking portion 62 shown in the first embodiment (see Figs. 10 and 11) may be formed on the second surface 34B, and the locked portion 64 shown in the first embodiment may be formed at the tip of the routing portion 57. Alternatively, as shown in Fig. 34, the locking portion 62 shown in the second embodiment (see Figs. 17 and 18) may be formed on the second surface 34B, and the locked portion 64 shown in the second embodiment may be formed at the tip of the routing portion 57.

[0092] 35, the locking portion 62 shown in the modified example of the second embodiment (see FIGS. 19 and 20) may be formed on the second surface 34B, and the locked portion 64 shown in the modified example of the second embodiment may be formed at the tip of the routing portion 57. As shown in FIG. 36, the locking portion 62 shown in the third embodiment (see FIGS. 21 and 22) may be formed on the second surface 34B, and the locked portion 64 shown in the third embodiment may be formed at the tip of the routing portion 57. As shown in FIG. 37, the locking portion 62 shown in the fourth embodiment (see FIGS. 23 and 24) may be formed on the second surface 34B, and the locked portion 64 shown in the fourth embodiment may be formed at the tip of the routing portion 57.

[0093] 38, the locking portion 62 shown in the fifth embodiment (see FIGS. 27 and 28) may be formed on the second surface 34B, and the locked portion 64 shown in the fifth embodiment may be formed at the tip of the routing portion 57. Also, as shown in FIG. 39, the locking portion 62 shown in the sixth embodiment (see FIGS. 29 and 30) may be formed on the second surface 34B, and the locked portion 64 shown in the sixth embodiment may be formed at the tip of the routing portion 57.

[0094] Eighth Embodiment Next, an eighth embodiment of the technique of the present disclosure will be described.

[0095] In the eighth embodiment, the configurations of the locking portion 62 and the locked portion 64 are changed as follows compared to the first embodiment. That is, in the eighth embodiment, as shown in Figures 40 and 41 , the locking portion 62 is formed on the first tooth insulating portion 32 (more specifically, the first main body insulating portion 32A). The locking portion 62 is formed in a protrusion that protrudes in the Z direction.

[0096] An insulating portion 58 that covers the tooth portion 20 from the Z direction is formed at the end of the second tooth insulating portion 52, and the locked portion 64 is formed in the insulating portion 58 of the second tooth insulating portion 52. The locked portion 64 is formed in a hole shape. The locked portion 64 is locked with the locking portion 62 by inserting the locking portion 62 into the inside of the locked portion 64. Specifically, the locked portion 64 is locked with the locking portion 62 in the X direction, Y direction, and Z direction.

[0097] Even with this configuration, it is possible to prevent the insulating sheet 50 from shifting from its normal position relative to the core member 14 when winding the winding portion 18 .

[0098] Furthermore, since the locked portions 64 are formed in the shape of holes, the locked portions 64 can be easily formed in the insulating sheet 50 .

[0099] In the eighth embodiment, the locked portion 64 is formed in a hole shape, but may be formed in a recess shape.

[0100] Ninth Embodiment Next, a ninth embodiment of the technique of the present disclosure will be described.

[0101] In the ninth embodiment, the configuration of the insulator 16 is changed as follows compared to the first embodiment: That is, in the ninth embodiment, in addition to the insulating member 30, a first insulating sheet 50A and a second insulating sheet 50B are used, as shown in FIG.

[0102] The insulating member 30 has the same configuration as in the first embodiment, and includes a first tooth insulating portion 32 and a first core back insulating portion 34. The first insulating sheet 50A also has a second tooth insulating portion 52 and a second core back insulating portion 54. The second tooth insulating portion 52 and the second core back insulating portion 54 have the same configuration as in the first embodiment. The second insulating sheet 50B is inserted between adjacent winding winding portions 18 after the winding winding portions 18 are wound around the core members 14 and the insulating members 30 are assembled into a ring shape.

[0103] The second insulating sheet 50B is disposed between adjacent winding winding portions 18 in the circumferential direction of the stator core 24, and insulates the adjacent winding winding portions 18. A pair of adjacent second insulating sheets 50B in the circumferential direction of the stator core 24 overlap each other.

[0104] The retaining structure 60 includes a first retaining portion 86 formed in the first core-back insulating portion 34, a second retaining portion 88 formed in the first tooth insulating portion 32 (specifically, the first tip insulating portion 32B), a first end portion 50B1 of the second insulating sheet 50B, and a second end portion 50B2 of the second insulating sheet 50B. The first retaining portion 86 and the second retaining portion 88 are groove-shaped. The first end portion 50B1 of the second insulating sheet 50B is inserted into and held by the first retaining portion 86. The second end portion 50B2 of the second insulating sheet 50B is inserted into and held by the second retaining portion 88.

[0105] With this configuration, it is possible to prevent the second insulating sheet 50B from shifting from its normal position between the adjacent winding winding portions 18.

[0106] Furthermore, by inserting the first end 50B1 of the second insulating sheet 50B into the first holding portion 86, it is possible to ensure a creepage distance along the insulating member 30, the first insulating sheet 50A, and the second insulating sheet 50B from the winding winding portion 18 to the core back portion 22. Furthermore, by inserting the second end 50B2 of the second insulating sheet 50B into the second holding portion 88, it is possible to ensure a creepage distance L6 along the insulating member 30 and the second insulating sheet 50B between adjacent winding terminal portions 19.

[0107] Note that, among the configurations described in the first to ninth embodiments, configurations that can be combined may be combined as appropriate.

[0108] The above describes one embodiment of the technology of the present disclosure, but the present invention is not limited to the above, and it goes without saying that the present invention can be implemented in various modifications within the scope of the gist of the present disclosure.

[0109] The following are supplementary notes regarding the technology of the present disclosure. (Supplementary Note 1) A stator (10) comprising: a stator core (24); an insulating member (30) that insulates the stator core from the axial direction of the stator core; an insulating sheet (50) that insulates the stator core from an orthogonal direction perpendicular to the axial direction of the stator core; a holding structure (60) that holds the insulating sheet in a predetermined regular position relative to the stator core; and a winding winding (18) wound around the stator core via the insulating member and the insulating sheet. (Supplementary Note 2) The stator according to Supplementary Note 1, wherein the holding structure has a locking portion (62) formed on the insulating member and a locked portion (64) formed on the insulating sheet, and the locked portion is locked with the locking portion in at least one of the axial direction and the orthogonal direction. (Supplementary Note 3) The stator according to Supplementary Note 2, wherein the stator core has teeth (20) extending radially of the stator core and core back portions (22) extending circumferentially of the stator core and connected to base ends of the teeth, the insulating member has first teeth insulating portions (32) that insulate the teeth and a first core back insulating portion (34) that insulates the core back, the insulating sheet has second teeth insulating portions (52) that insulate the teeth and a second core back insulating portion (54) that insulates the core back, the locking portions are formed in the first core back insulating portions, and the locked portions are formed in the second core back insulating portions. (Supplementary Note 4) The stator according to Supplementary Note 3, wherein the first core-back portion insulating portion has a first surface (34A) on the tooth side and a second surface (34B) on the opposite side to the tooth side, and the locking portion is formed on the first surface. (Supplementary Note 5) The stator according to Supplementary Note 3, wherein the first core-back portion insulating portion has a first surface on the tooth side and a second surface on the opposite side to the tooth side, and the locking portion is formed on the second surface. (Supplementary Note 6) The stator according to any one of Supplementary Notes 2 to 5, wherein the locking portion is formed in a recess, hole, or groove shape, and the locked portion is formed in a tongue shape.(Supplementary Note 7) The stator according to any one of Supplementary Notes 2 to 5, wherein the locking portion is formed in a hook shape, and the locked portion is formed at an end of the insulating sheet. (Supplementary Note 8) The stator according to any one of Supplementary Notes 2 to 5, wherein the locking portion is formed in a protrusion shape, and the locked portion is formed in a recessed or hole shape. (Supplementary Note 9) The stator according to any one of Supplementary Notes 2 to 5, wherein the locking portion is formed in a recessed or hole shape, and the locked portion is formed in a protrusion shape. (Appendix 10) The stator described in Appendix 2, wherein the stator core has teeth portions extending radially of the stator core and core back portions extending circumferentially of the stator core and connected to base ends of the teeth portions, the insulating member has first teeth insulating portions that insulate the teeth portions and a first core back insulating portion that insulates the core back portion, the insulating sheet has second teeth insulating portions that insulate the teeth portions and a second core back insulating portion that insulates the core back portion, the locking portions are formed on the first teeth insulating portions, and the locked portions are formed on the second teeth insulating portions. (Supplementary Note 11) The stator according to Supplementary Note 3 and any one of Supplements 4 to 9 dependent on Supplementary Note 3, wherein the first tooth insulating portions have first body insulating portions (32A) that insulate body portions (20A) of the teeth and first tip insulating portions (32B) that insulate tip portions (20B) of the teeth, the second tooth insulating portions have second body insulating portions (52A) that insulate body portions of the teeth and second tip insulating portions (52B) that insulate tip portions of the teeth, and the locking portions are formed at a higher position than the first body insulating portions in the axial direction. (Supplementary Note 12) The stator according to Supplementary Note 3 and any one of Supplements 4 to 9 dependent on Supplementary Note 3, and Supplementary Note 11, wherein a height of the second core-back insulating portion is higher than a height of the second tooth insulating portion in the axial direction.(Supplementary Note 13) The stator core according to any one of Supplementary Note 3, Supplementary Note 4 to Supplementary Note 9, Supplementary Note 11, and Supplementary Note 12, which are dependent on Supplementary Note 3, wherein the stator core has teeth portions extending radially of the stator core, and core back portions extending circumferentially of the stator core and connected to base ends of the teeth portions, the insulating member has first teeth insulating portions that insulate the teeth portions, and a first core back insulating portion that insulates the core back portion, the insulating sheet has second teeth insulating portions that insulate the teeth portions, and a second core back insulating portion that insulates the core back portion, and the locking portions are formed at positions closer to the first teeth insulating portions than to ends of the first core back insulating portions in a tangential direction of the stator core. (Supplementary Note 14) The stator according to Supplementary Note 3 and any one of Supplementary Notes 4 to 13 dependent on Supplementary Note 3, wherein the insulating sheet has a winding winding portion insulating portion (56) arranged between the winding winding portions adjacent to each other in the circumferential direction of the stator core, the winding winding portion insulating portion has a first bent portion (56A) bent toward the second core back portion insulating portion and a second bent portion (56B) bent toward the second teeth portion insulating portion, and a tip end portion (56A1) of the first bent portion and a tip end portion (56B1) of the second bent portion overlap each other.(Supplementary Note 15) The stator core has teeth portions extending radially of the stator core and core back portions extending circumferentially of the stator core and connected to base ends of the teeth portions, the insulating member has first teeth insulating portions that insulate the teeth portions and a first core back insulating portion that insulates the core back portion, the insulating sheet has second teeth insulating portions that insulate the teeth portions and a second core back insulating portion that insulates the core back portion, the first teeth insulating portions have first body insulating portions that insulate main bodies of the teeth portions and first tip insulating portions that insulate tip ends of the teeth portions, and the second teeth insulating portions have second body insulating portions that insulate main bodies of the teeth portions and a second tip insulating portion that insulate tip ends of the teeth portions, the first core-back portion insulating portion and the first tip portion insulating portion extend in a tangential direction of the stator core relative to the first main body portion insulating portion; the second core-back portion insulating portion and the second tip portion insulating portion are bent in a tangential direction of the stator core relative to the second main body portion insulating portion; and the retaining structure has a first structure (68) in which the second core-back portion insulating portion is pressed against the first core-back portion insulating portion relative to the second main body portion insulating portion by a springback force, and a second structure (70) in which the second tip portion insulating portion is pressed against the first tip portion insulating portion relative to the second main body portion insulating portion by a springback force.(Supplementary Note 16) The stator core has teeth portions extending radially of the stator core and core back portions extending circumferentially of the stator core and connected to base ends of the teeth portions, the insulating member has first teeth insulating portions that insulate the teeth portions and a first core back insulating portion that insulates the core back portion, the insulating sheet has second teeth insulating portions that insulate the teeth portions and a second core back insulating portion that insulates the core back portion, the first teeth insulating portions have first body insulating portions that insulate main bodies of the teeth portions and first tip insulating portions that insulate tip ends of the teeth portions, and the second teeth insulating portions have second body insulating portions that insulate main bodies of the teeth portions and a second tip insulating portion that insulates tip ends of the teeth portions, 16. The stator according to any one of Supplementary notes 1 to 15, wherein the holding structure has a holding portion (72) formed in the first tip insulating portion and a held portion (74) formed in the second tip insulating portion, and the held portion is held in at least one of the axial direction and the orthogonal direction by the holding portion. (Supplementary Note 17) A stator core according to the present invention comprises a first insulating sheet (50A) as the insulating sheet, and a second insulating sheet (50B) arranged between the winding winding portions adjacent in the circumferential direction of the stator core, wherein the stator core has teeth portions extending in the radial direction of the stator core and core back portions extending in the circumferential direction of the stator core and connected to base ends of the teeth portions, the insulating member has a first teeth portion insulating portion that insulates the teeth portions and a first core back portion insulating portion that insulates the core back portion, the insulating sheet has a second teeth portion insulating portion that insulates the teeth portions and a second core back portion insulating portion that insulates the core back portion, the holding structure has a first holding portion (86) formed in the first core back portion insulating portion and a second holding portion (88) formed in the first teeth portion insulating portion, and the first holding portion holds a first end portion (50B1) of the second insulating sheet, The stator according to any one of Supplementary notes 1 to 16, wherein the second holding portion holds a second end (50B2) of the second insulating sheet.(Supplementary Note 18) A method for manufacturing a stator according to any one of Supplementary Note 1 to Supplementary Note 17, comprising: an attachment step of attaching, to the stator core, an insulating member that insulates the stator core from the axial direction of the stator core and an insulating sheet that insulates the stator core from a direction perpendicular to the axial direction of the stator core; a holding step of holding the insulating sheet in a predetermined regular position relative to the stator core using a holding structure that holds the insulating sheet in the predetermined regular position relative to the stator core; and a winding step of winding a winding portion around the stator core via the insulating member and the insulating sheet.

Claims

1. A stator (10) comprising: a stator core (24); an insulating member (30) that insulates the stator core from the axial direction of the stator core; an insulating sheet (50) that insulates the stator core from an orthogonal direction perpendicular to the axial direction of the stator core; a holding structure (60) that holds the insulating sheet in a predetermined regular position relative to the stator core; and a winding portion (18) wound around the stator core via the insulating member and the insulating sheet.

2. A stator as set forth in claim 1, wherein the holding structure has a locking portion (62) formed on the insulating member and a locked portion (64) formed on the insulating sheet, and the locked portion is locked with the locking portion in at least one of the axial direction and the perpendicular direction.

3. The stator according to claim 2, wherein the stator core has teeth (20) extending radially of the stator core and core back portions (22) extending circumferentially of the stator core and connected to base ends of the teeth, the insulating member has first teeth insulating portions (32) that insulate the teeth and a first core back insulating portion (34) that insulates the core back, the insulating sheet has second teeth insulating portions (52) that insulate the teeth and a second core back insulating portion (54) that insulates the core back, the locking portions are formed in the first core back insulating portion, and the locked portions are formed in the second core back insulating portion.

4. A stator as set forth in claim 3, wherein the first core back insulating portion has a first surface (34A) on the side of the teeth and a second surface (34B) on the opposite side to the teeth, and the locking portion is formed on the first surface.

5. A stator according to claim 3, wherein the first core-back insulating portion has a first surface on the side of the teeth and a second surface on the opposite side to the teeth, and the locking portion is formed on the second surface.

6. The stator according to any one of Supplementary Notes 2 to 5, wherein the locking portion is formed in a recess, hole, or groove shape, and the locked portion is formed in a tongue shape.

7. The stator according to claim 2, wherein the stator core has teeth extending radially of the stator core and core back portions extending circumferentially of the stator core and connected to base ends of the teeth, the insulating member has first teeth insulating portions that insulate the teeth and a first core back insulating portion that insulates the core back, the insulating sheet has second teeth insulating portions that insulate the teeth and a second core back insulating portion that insulates the core back, the locking portions are formed on the first teeth insulating portions, and the locked portions are formed on the second teeth insulating portions.

8. A stator as set forth in claim 3 and any one of claims 4 to 6 dependent on claim 3, wherein the first tooth insulating portion has a first body insulating portion (32A) that insulates the body portion (20A) of the tooth portion and a first tip insulating portion (32B) that insulates the tip portion (20B) of the tooth portion, the second tooth insulating portion has a second body insulating portion (52A) that insulates the body portion of the tooth portion and a second tip insulating portion (52B) that insulates the tip portion of the tooth, and the locking portion is formed at a higher position in the axial direction than the first body insulating portion.

9. A stator as set forth in claim 3, any one of claims 4 to 6 dependent on claim 3, and claim 8, wherein the height of the second core-back insulating portion in the axial direction is greater than the height of the second teeth insulating portion.

10. A stator as set forth in claim 3, any one of claims 4 to 6, 8 and 9 dependent on claim 3, wherein the stator core has teeth extending radially of the stator core and core back portions extending circumferentially of the stator core and connected to base ends of the teeth, the insulating member has a first teeth insulating portion that insulates the teeth and a first core back insulating portion that insulates the core back, the insulating sheet has a second teeth insulating portion that insulates the teeth and a second core back insulating portion that insulates the core back, and in the tangential direction of the stator core, the locking portion is formed at a position closer to the first teeth insulating portion than to an end of the first core back insulating portion.

11. A stator as set forth in claim 3 and any one of claims 4 to 10 dependent on claim 3, wherein the insulating sheet has a winding winding portion insulating portion (56) arranged between adjacent winding winding portions in the circumferential direction of the stator core, the winding winding portion insulating portion having a first bent portion (56A) bent toward the second core back portion insulating portion and a second bent portion (56B) bent toward the second teeth portion insulating portion, and a tip end portion (56A1) of the first bent portion and a tip end portion (56B1) of the second bent portion overlap each other.

12. The stator core has teeth extending radially of the stator core and core back portions extending circumferentially of the stator core and connected to base ends of the teeth, the insulating member has a first teeth insulating portion that insulates the teeth and a first core back insulating portion that insulates the core back, the insulating sheet has a second teeth insulating portion that insulates the teeth and a second core back insulating portion that insulates the core back, the first teeth insulating portion has a first body insulating portion that insulates main bodies of the teeth and a first tip insulating portion that insulates tip ends of the teeth, the second teeth insulating portion has a second body insulating portion that insulates main bodies of the teeth and a second tip insulating portion that insulates tip ends of the teeth, 12. A stator as claimed in any one of claims 1 to 11, wherein the first core back insulating portion and the first tip insulating portion extend in a tangential direction of the stator core relative to the first main body insulating portion, the second core back insulating portion and the second tip insulating portion are bent in a tangential direction of the stator core relative to the second main body insulating portion, and the retaining structure has a first structure (68) in which the second core back insulating portion is pressed against the first core back insulating portion relative to the second main body insulating portion by a springback force, and a second structure (70) in which the second tip insulating portion is pressed against the first tip insulating portion relative to the second main body insulating portion by a springback force.

13. The stator core has teeth extending radially of the stator core and core back portions extending circumferentially of the stator core and connected to base ends of the teeth, the insulating member has a first teeth insulating portion that insulates the teeth and a first core back insulating portion that insulates the core back, the insulating sheet has a second teeth insulating portion that insulates the teeth and a second core back insulating portion that insulates the core back, the first teeth insulating portion has a first body insulating portion that insulates main bodies of the teeth and a first tip insulating portion that insulates tip ends of the teeth, and the second teeth insulating portion has a second body insulating portion that insulates main bodies of the teeth and a second tip insulating portion that insulates tip ends of the teeth, 13. The stator according to claim 1, wherein the holding structure has a holding portion (72) formed on the first tip insulating portion and a held portion (74) formed on the second tip insulating portion, and the held portion is held in at least one of the axial direction and the orthogonal direction by the holding portion.

14. A stator core according to claim 1, further comprising: a first insulating sheet (50A) as the insulating sheet; and a second insulating sheet (50B) arranged between the winding winding portions adjacent in the circumferential direction of the stator core; wherein the stator core has teeth portions extending radially of the stator core and core back portions extending circumferentially of the stator core and connected to base ends of the teeth portions; the insulating member has a first teeth insulating portion that insulates the teeth portions and a first core back insulating portion that insulates the core back portion; the insulating sheet has a second teeth insulating portion that insulates the teeth portions and a second core back insulating portion that insulates the core back portion; the holding structure has a first holding portion (86) formed in the first core back insulating portion and a second holding portion (88) formed in the first teeth insulating portion; the first holding portion holds a first end (50B1) of the second insulating sheet; The stator according to any one of claims 1 to 13, wherein the second holding portion holds a second end portion (50B2) of the second insulating sheet.

15. A method for manufacturing a stator, comprising: an attachment step of attaching to the stator core an insulating member that insulates the stator core from the axial direction of the stator core and an insulating sheet that insulates the stator core from a direction perpendicular to the axial direction of the stator core; a holding step of holding the insulating sheet in a predetermined correct position relative to the stator core using a holding structure that holds the insulating sheet in the correct position relative to the stator core; and a winding step of winding a winding portion around the stator core via the insulating member and the insulating sheet.

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