Stator and stator manufacturing method

Abstract

To provide a stator which can secure insulation property of a boundary of a core back part provided on adjacent core members, and a stator manufacturing method.SOLUTION: A stator (10) includes: a stator core (12) which is configured so that a plurality of core members (20) are combined with each other; an insulator (14) which is a resin molding having a plurality of insulation parts (22); and a coil (16) which is wound around the stator core. Each of the core members has a core back part (26) and a tooth part (28), and each of the insulation parts has a first insulation part (34) for covering the core back part from the radial inside of the stator core, and a second insulation part (36) for covering the tooth part. The insulator has a connection part (38) for connecting the first insulation parts provided on the adjacent insulation parts. The connection part insulates a boundary (40) of the core back part provided on the adjacent core members, from a coil winding part provided on the adjacent core members.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The technology of the present disclosure relates to a stator and a method for manufacturing the stator. [Background technology]

[0002] Conventionally, a known stator includes a stator core formed by combining a plurality of independent core members in a ring shape, a plurality of resin members attached to the plurality of core members, and a winding wound around the stator core via the resin members. Some of these types of stators have the plurality of resin members connected by insulating paper (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2023 / 162357 Brochure Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-described stator, the winding windings of adjacent core members are insulated from the boundaries of the core backs of adjacent core members by insulating paper. However, this configuration raises the risk of dielectric breakdown in the insulating paper when a high voltage is applied to the windings. Therefore, there is room for improvement in ensuring the insulation of the boundaries of adjacent core backs.

[0005] The technology of the present disclosure provides a stator and a method for manufacturing the stator that can ensure insulation at the boundary between adjacent core back portions. [Means for solving the problem]

[0006] A first aspect of the technique of the present disclosure includes a stator core (12) configured by combining a plurality of core members (20) independent of one another in an annular shape, an insulator (14) that is a resin molded product having a plurality of insulating portions (22) attached to the plurality of core members, respectively, and a winding (16) wound around the stator core via the insulator, wherein each of the core members has a core back portion (26) that forms an outer periphery (30) of the stator core, and teeth portions (28) that extend from the core back portion toward the inside in the radial direction of the stator core, and each of the insulating portions connects the core back portion to the inside in the radial direction of the stator core. a first insulating portion (34) covering the tooth portion from the side thereof and a second insulating portion (36) covering the tooth portion, wherein a winding winding portion (24) is formed around each of the tooth portions by winding the winding around the second insulating portion, the insulator has a connecting portion (38) formed integrally with the insulating portion and connecting the first insulating portions provided on adjacent insulating portions among the plurality of insulating portions, and the connecting portion insulates a boundary portion (40) of the core back portion provided on the adjacent core member from the winding winding portion provided on the adjacent core member among the plurality of core members.

[0007] A second aspect of the technique of the present disclosure is a method for manufacturing a stator according to the first aspect, comprising: an assembly process for assembling a plurality of the core members to a plurality of the insulating portions provided on the insulator in a linear form; a winding process for forming a plurality of the winding winding portions by winding the winding around each of the tooth portions provided on the plurality of the core members via the second insulating portions; and an annularization process for combining the plurality of the core members into an annular form by deforming each of the connecting portions of the insulator from the linear form.

[0008] According to the technology of the present disclosure, a stator and a method for manufacturing a stator that can ensure insulation at the boundary between adjacent core back portions are provided. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is a plan view of the stator according to the first embodiment. [Figure 2] FIG. 2 is a plan view of a stator component according to the first embodiment. [Figure 3] FIG. 2 is a plan view of a core member and an insulator according to the first embodiment. [Figure 4] FIG. 2 is a plan view of a core member according to the first embodiment. [Figure 5] FIG. 2 is a plan view showing a linear form of the insulator according to the first embodiment. [Figure 6] 3 is a plan view showing a state in which a plurality of core members are assembled to the insulator according to the first embodiment. FIG. [Figure 7] 3 is an enlarged plan view of a main part showing a state in which a plurality of core members are assembled to the insulator according to the first embodiment. FIG. [Figure 8] 4 is an explanatory view illustrating a state in which the insulator according to the first embodiment is deformed from a linear shape to an annular shape. FIG. [Figure 9] 10 is an explanatory view illustrating a state in which the insulator according to the second embodiment is deformed from a linear shape to an annular shape. FIG. [Figure 10] 10 is an explanatory view illustrating a state in which the insulator according to the third embodiment is deformed from a linear shape to an annular shape. FIG. [Figure 11] 10 is an explanatory view illustrating a state in which the insulator according to the fourth embodiment is deformed from a linear shape to an annular shape. FIG. [Figure 12] 10 is an explanatory view illustrating a state in which the insulator according to the fifth embodiment is deformed from a linear shape to an annular shape. FIG. [Figure 13] FIG. 13 is an explanatory view illustrating a state in which the insulator according to the sixth embodiment is deformed from a linear shape to an annular shape. [Figure 14] FIG. 13 is an explanatory view illustrating a state in which the insulator according to the seventh embodiment is deformed from a linear shape to an annular shape. [Figure 15] FIG. 13 is an explanatory view illustrating a state in which the insulator according to the eighth embodiment is deformed from a linear shape to an annular shape. [Figure 16] FIG. 13 is an explanatory view illustrating the connecting portion according to the eighth embodiment from another perspective. DETAILED DESCRIPTION OF THE INVENTION

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

[0011] As shown in Fig. 1, a stator 10 according to the first embodiment includes a stator core 12, an insulator 14, and a winding 16. The stator 10 is made up of a plurality of stator components 18. The stator 10 is constructed by combining the plurality of stator components 18 in an annular shape. The stator 10 is applied to an inner rotor type brushless motor.

[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 12, which will be described later, are the same as the tangential direction, radial direction, axial direction, and circumferential direction of the stator 10, respectively.

[0013] 2 to 4, each stator component 18 includes a core member 20, an insulating portion 22, and a winding portion 24. The multiple core members 20 are configured independently of one another. The multiple core members 20 are combined in an annular shape to form the stator core 12 (see FIG. 1).

[0014] Each core member 20 has a core back portion 26 and teeth portions 28. The core back portion 26 extends in the circumferential direction of the stator core 12 (see FIG. 1), and the teeth portions 28 extend inward in the Y direction from the center of the core back portion 26. The tip portions of the teeth portions 28 are free ends, and the base ends of the teeth portions 28 are connected to the core back portion 26.

[0015] When the stator core 12 is constructed, the multiple core back portions 26 form an annular portion 30 (see FIG. 1) that is the outer periphery of the stator core 12, and the multiple tooth portions 28 extend radially from the center of the stator core 12. Slots 32 are formed between the multiple tooth portions 28.

[0016] Note that the configuration of each stator component 18, including its details, is not strictly symmetrical in the X direction when viewed from the Z direction. However, for the sake of convenience, the following description will assume that the main configuration of each stator component 18 is symmetrical in the X direction when viewed from the Z direction, and will describe the configuration of one side of each stator component 18.

[0017] The core back portion 26 is formed with an inner surface 26A and an axial end face 26B, and the tooth portion 28 is formed with a side surface 28A and an axial end face 28B. The inner surface 26A extends in the X direction and the Z direction and faces inward in the Y direction. The axial end face 26B extends in the X direction and the Y direction and faces the Z direction. The side surface 28A extends in the Y direction and the Z direction and faces the X direction. The axial end face 28B extends in the X direction and the Y direction and faces the Z direction.

[0018] The insulator 14 has a plurality of insulating portions 22. Each insulating portion 22 is attached to the core member 20. The insulating portion 22 has a first insulating portion 34 and a second insulating portion 36. The first insulating portion 34 covers the core back portion 26 from the inside in the Y direction and from both sides in the Z direction. Specifically, the first insulating portion 34 is attached to the inner surface 26A and the axial end face 26B, covering the inner surface 26A and the axial end face 26B. The second insulating portion 36 surrounds the tooth portion 28 in the Y direction, covering the tooth portion 28. Specifically, the second insulating portion 36 is attached to the side surface 28A and the axial end face 28B, covering the side surface 28A and the axial end face 28B. The second insulating portion 36 is formed, for example, in a ring shape around the Y direction (in other words, in a bobbin shape), and is attached to the teeth portion 28 by inserting the teeth portion 28 inside the second insulating portion 36. Note that the second insulating portion 36 may be divided into multiple members in the axial direction of the insulator 14.

[0019] The winding 16 is wound around the stator core 12 via the insulator 14. The winding 16 has a winding winding portion 24. The winding winding portion 24 is formed by winding the winding 16 around the teeth 28 in the Y direction. A single winding 16 forming the winding winding portion 24 may be wound around only one tooth 28 to form only one winding winding portion 24, or may be wound around each of multiple teeth 28 to form multiple winding winding portions 24.

[0020] As shown in FIG. 5, the insulator 14 is a resin-molded product having a plurality of insulating portions 22 and a plurality of connecting portions 38. The insulator 14 is formed linearly during resin molding. Each connecting portion 38 is formed integrally with adjacent ones of the plurality of insulating portions 22. Each connecting portion 38 connects the first insulating portions 34 provided on adjacent insulating portions 22. The connecting portions 38 extend in the axial direction of the insulator 14.

[0021] As shown in Fig. 6, when the insulator 14 is in a linear form, the core members 20 are respectively assembled to the insulating portions 22 provided on the insulator 14. Then, the insulator 14 is transformed from the linear form into an annular form by the deformation of each connecting portion 38 (see Fig. 1).

[0022] The upper diagrams of Figures 7 and 8 show the linear form of the insulator 14. The connecting portion 38 is formed linearly when the insulator 14 is resin-molded. That is, the connecting portion 38 is formed linearly when the insulator 14 is formed linearly by resin-molding. The connecting portion 38 is formed in a plate shape.

[0023] The lower diagram in FIG. 8 shows the annular shape of the insulator 14. When the insulator 14 is in the annular shape, a groove 42 recessed outward in the Y direction is formed at the boundary 40 between adjacent core back portions 26. The groove 42 is formed in a V-shape that opens inward in the Y direction. To compensate for the volume reduction of the core back portions 26 due to the formation of the groove 42 at the boundary 40 between adjacent core back portions 26, a step or the like formed on the outer periphery of the core back portion 26 may be eliminated. When the insulator 14 is in the annular shape, the connecting portion 38 is bent into a shape that convex outward in the Y direction (for example, a V-shape) and is accommodated inside the groove 42. By bending the connecting portion 38 into a shape that convex outward in the Y direction, the connecting portion 38, which is compressed as the insulator 14 is deformed into an annular shape, can be released outward in the Y direction.

[0024] When housed inside the groove 42, the connecting portion 38 insulates the boundary portion 40 between the core back portions 26 provided on the adjacent core members 20 from the winding winding portions 24 (see FIG. 1) provided on the adjacent core members 20. Specifically, the connecting portion 38 insulates the boundary portion 40 by covering a pair of side surfaces 42A formed inside the V-shaped groove 42 formed in the boundary portion 40. The connecting portion 38 constitutes a part of the insulator 14, which is a resin molded product, and is formed to be thicker than insulating paper, for example.

[0025] Next, a description will be given of a method for manufacturing the stator 10 according to the first embodiment. The method for manufacturing the stator 10 according to the first embodiment includes an assembly step, a winding winding step, and a circular forming step.

[0026] In the assembling process, the core members 20 are respectively assembled to the insulating portions 22 provided on the linear insulator 14 formed in a straight line by resin molding (see FIG. 6).

[0027] In the winding process, the winding 16 is wound around each of the teeth 28 provided on the core members 20 via the second insulating portion 36, thereby forming a plurality of winding portions 24. A single winding 16 forming a winding portion 24 may be wound around only one tooth 28 to form only one winding portion 24, or may be wound around each of the plurality of teeth 28 to form a plurality of winding portions 24.

[0028] In the annular forming process, each connecting portion 38 is deformed to change the insulator 14 from a linear shape formed by resin molding to an annular shape, and multiple core members 20 are combined into an annular shape (see FIG. 1). The stator 10 is manufactured through the above processes.

[0029] As described above in detail, in the first embodiment, the connecting portion 38 provided on the insulator 14, which is a resin molded product, insulates the boundary portion 40 of the core back portion 26 provided on adjacent core members 20. Therefore, compared to a configuration in which the boundary portion 40 is insulated by insulating paper, for example, the thickness of the connecting portion 38 can be made thicker, thereby ensuring the insulation of the boundary portion 40.

[0030] Furthermore, since the insulator 14 is a resin molded product that integrally has multiple insulating portions 22 and multiple connecting portions 38, the number of parts can be reduced compared to, for example, a configuration that has multiple insulating portions 22 and insulating paper, thereby improving workability when attaching the insulator 14 to multiple core members 20.

[0031] Furthermore, since the connecting portion 38 is formed in a straight line when the insulator 14 is formed into a linear shape by resin molding, the insulator 14 can be molded more easily than, for example, when the connecting portion 38 is formed into a shape other than a straight line.

[0032] [Second embodiment] Next, a second embodiment of the technique of the present disclosure will be described.

[0033] In the second embodiment, the configuration of the connecting portion 38 is changed as follows compared to the first embodiment. That is, as shown in the upper diagram of Fig. 9, the connecting portion 38 is formed in a straight line when the insulator 14 is formed into a straight line by resin molding, which is the same as in the first embodiment. However, as shown in the lower diagram of Fig. 9, the connecting portion 38 is bent into a shape that convex inward in the Y direction when the insulator 14 is formed into a ring-shaped ring.

[0034] When the connecting portion 38 is bent into a shape that convexes inward in the Y direction, it insulates the boundary portion 40 of the core back portion 26 provided on the adjacent core member 20 from the winding winding portion 24 (see Figure 1) provided on the adjacent core member 20.

[0035] In this way, when the connecting portion 38 is bent into a shape that convexes inward in the Y direction, the connecting portion 38, which is compressed as the insulator 14 is deformed into an annular shape, can be released inward in the Y direction.

[0036] Furthermore, by bending the connecting portions 38 so as to form a shape that convex inward in the Y direction, it is possible to avoid interference between the connecting portions 38 and the core back portion 26. This eliminates the need to form grooves 42 (see FIG. 8) in the boundary portions 40 of the core back portion 26 to allow the connecting portions 38 to escape, so the volume of the core back portion 26 can be secured.

[0037] [Third embodiment] Next, a third embodiment of the technique of the present disclosure will be described.

[0038] In the third embodiment, the configuration of the connecting portion 38 is changed as follows compared to the first embodiment. That is, as shown in the upper diagram of Fig. 10 , the connecting portion 38 is formed into a shape that is bent so as to form a convex shape radially outward of the stator core 12 when the insulator 14 is formed into a linear shape by resin molding. Then, as shown in the lower diagram of Fig. 10 , when the insulator 14 is formed into an annular shape, the connecting portion 38 is bent into a shape that forms a convex shape radially outward in the Y direction and is accommodated inside the groove 42.

[0039] When the connecting portion 38 is bent into a shape that convexes outward in the Y direction, it insulates the boundary portion 40 of the core back portion 26 provided on the adjacent core member 20 from the winding winding portion 24 (see Figure 1) provided on the adjacent core member 20.

[0040] In this way, when the connecting portion 38 is bent into a shape that convexes outward in the Y direction, the connecting portion 38, which is compressed as the insulator 14 is deformed into an annular shape, can be released outward in the Y direction.

[0041] Furthermore, when the insulator 14 is formed into a linear shape by resin molding, if the connecting portion 38 is formed into a curved shape that convexes outward in the Y direction, bending stress can be concentrated at the tip of the connecting portion 38, so that the connecting portion 38 can be easily deformed when the insulator 14 is transformed from a linear shape to a ring shape.

[0042] [Fourth embodiment] Next, a fourth embodiment of the technique of the present disclosure will be described.

[0043] In the fourth embodiment, the configuration of the connecting portion 38 is changed as follows compared to the first embodiment. That is, as shown in the upper diagram of Fig. 11 , the connecting portion 38 is formed into a shape that is bent so as to form a convex shape inward in the Y direction when the insulator 14 is formed into a linear shape by resin molding. Then, as shown in the lower diagram of Fig. 11 , the connecting portion 38 is bent into a shape that is convex inward in the Y direction when the insulator 14 is formed into an annular shape.

[0044] When the connecting portion 38 is bent into a shape that convexes inward in the Y direction, it insulates the boundary portion 40 of the core back portion 26 provided on the adjacent core member 20 from the winding winding portion 24 (see Figure 1) provided on the adjacent core member 20.

[0045] In this way, when the connecting portion 38 is bent into a shape that convexes inward in the Y direction, the connecting portion 38, which is compressed as the insulator 14 is deformed into an annular shape, can be released inward in the Y direction.

[0046] Furthermore, when the insulator 14 is formed into a linear shape by resin molding, if the connecting portion 38 is formed into a curved shape that convexes inward in the Y direction, bending stress can be concentrated at the tip of the connecting portion 38, so that the connecting portion 38 can be easily deformed when the insulator 14 is transformed from a linear shape to a ring shape.

[0047] Furthermore, by bending the connecting portions 38 so as to form a shape that convex inward in the Y direction, it is possible to avoid interference between the connecting portions 38 and the core back portion 26. This eliminates the need to form grooves 42 (see FIG. 8) in the boundary portions 40 of the core back portion 26 to allow the connecting portions 38 to escape, so the volume of the core back portion 26 can be secured.

[0048] [Fifth embodiment] Next, a fifth embodiment of the technique of the present disclosure will be described.

[0049] In the fifth embodiment, the configuration of the connecting portion 38 is changed as follows compared to the first embodiment. That is, as shown in the upper diagram of Fig. 12, the connecting portion 38 has a first protruding portion 44 that protrudes from one first insulating portion 34A of the first insulating portions 34 provided on adjacent insulating portions 22 toward the other first insulating portion 34B, a second protruding portion 46 that protrudes from the other first insulating portion 34B toward the one first insulating portion 34A, and a bent portion 48 that connects the tip end of the first protruding portion 44 and the tip end of the second protruding portion 46.

[0050] The bent portion 48 is formed in a shape that is bent so as to form a convex shape inward in the Y direction when the insulator 14 is formed into a linear shape by resin molding. Then, as shown in the lower diagram of Fig. 12, when the insulator 14 is formed into an annular shape, the bent portion 48 is bent in a shape that forms a convex shape inward in the Y direction.

[0051] When the bending portion 48 is bent so that it protrudes inward in the Y direction, the connecting portion 38 insulates the boundary portion 40 of the core back portion 26 provided on the adjacent core member 20 from the winding winding portion 24 (see Figure 1) provided on the adjacent core member 20.

[0052] In this way, when the connecting portion 38 is bent into a shape that convexes inward in the Y direction, the connecting portion 38, which is compressed as the insulator 14 is deformed into an annular shape, can be released inward in the Y direction.

[0053] Furthermore, by bending the connecting portions 38 so as to form a shape that convex inward in the Y direction, it is possible to avoid interference between the connecting portions 38 and the core back portion 26. This eliminates the need to form grooves 42 (see FIG. 8) in the boundary portions 40 of the core back portion 26 to allow the connecting portions 38 to escape, so the volume of the core back portion 26 can be secured.

[0054] Furthermore, when the connecting portion 38 is configured to have the first protruding portion 44, the second protruding portion 46, and the bent portion 48, the position of bending stress generated in the connecting portion 38 can be the connection portion between the first protruding portion 44 and the bent portion 48, and the connection portion between the second protruding portion 46 and the bent portion 48. This makes it possible to alleviate the bending stress generated in the connecting portion 38 compared to when the first insulating portions 34 are directly connected to each other by the bent portion 48.

[0055] [Sixth embodiment] Next, a sixth embodiment of the technique of the present disclosure will be described.

[0056] In the sixth embodiment, the configuration of the connecting portion 38 is changed as follows compared to the first embodiment. That is, as shown in the upper diagram of Fig. 13, the connecting portion 38 is formed into a bellows shape when the insulator 14 is formed into a linear shape by resin molding. Then, as shown in the lower diagram of Fig. 13, the connecting portion 38 is compressed into a flattened bellows shape in the circumferential direction of the stator core 12 when the insulator 14 is formed into an annular shape.

[0057] When the bellows-shaped connecting portion 38 is compressed in the circumferential direction of the stator core 12, the connecting portion 38 insulates the boundary portion 40 of the core back portion 26 provided on the adjacent core member 20 from the winding winding portion 24 (see Figure 1) provided on the adjacent core member 20.

[0058] In this way, when the connecting portion 38 is formed into a bellows shape when the insulator 14 is formed into a linear shape by resin molding, and when the insulator 14 is formed into an annular shape, the bellows shape is compressed into a flattened shape in the circumferential direction of the stator core 12, it is not necessary to form a groove 42 (see Figure 8) at the boundary portion 40 of the core back portion 26 to allow the connecting portion 38 to escape, so the volume of the core back portion 26 can be secured.

[0059] [Seventh embodiment] Next, a seventh embodiment of the technique of the present disclosure will be described.

[0060] In the seventh embodiment, the configuration of the connecting portion 38 is modified as follows compared to the first embodiment. That is, as shown in the upper diagram of FIG. 14 , the connecting portion 38 is formed linearly when the insulator 14 is formed into a linear shape by resin molding, and has a notch 50 that opens inward in the Y direction. The notch 50 is formed in a V-shape that opens inward in the Y direction. There may be any number of notches 50. Then, as shown in the lower diagram of FIG. 14 , the connecting portion 38 is compressed so that the width of the notch 50 narrows in the circumferential direction of the stator core 12 when the insulator 14 is formed into an annular shape.

[0061] When the connecting portion 38 is compressed in a manner that narrows the width of the notch 50 in the circumferential direction of the stator core 12, it insulates the boundary portion 40 of the core back portion 26 provided on the adjacent core member 20 from the winding winding portion 24 (see Figure 1) provided on the adjacent core member 20.

[0062] In this way, the connecting portion 38 is formed in a straight line when the insulator 14 is formed into a linear shape by resin molding, and has a notch 50 that opens inward in the Y direction.When the insulator 14 is formed into an annular shape, the connecting portion 38 is compressed in a form in which the width of the notch 50 narrows in the circumferential direction of the stator core 12. This eliminates the need to form a groove 42 (see Figure 8) in the boundary portion 40 of the core back portion 26 to allow the connecting portion 38 to escape, thereby ensuring the volume of the core back portion 26.

[0063] [Eighth embodiment] Next, an eighth embodiment of the technique of the present disclosure will be described.

[0064] In the eighth embodiment, the configuration of the connecting portion 38 is modified as follows compared to the first embodiment. Specifically, as shown in the upper diagram of FIG. 15 , the connecting portion 38 is formed into a wave shape when the insulator 14 is formed into a linear shape by resin molding. Specifically, the connecting portion 38 has alternating first notches 52 that open inward in the Y direction and second notches 54 that open outward in the Y direction. The first notches 52 and the second notches 54 are each formed into a semicircular shape. The number of first notches 52 and second notches 54 may be any number. Furthermore, as shown in the lower diagram of FIG. 15 , when the insulator 14 is formed into an annular shape, the connecting portion 38 is compressed in the circumferential direction of the stator core 12 so that the widths of the first notches 52 and the second notches 54 narrow, and the connecting portion 38 is bent into a shape that convex inward in the Y direction.

[0065] When the stator core 12 is compressed in the circumferential direction of the stator core 12 into a flattened waveform, the connecting portion 38 insulates the boundary portion 40 of the core back portion 26 provided on the adjacent core member 20 from the winding winding portion 24 (see Figure 1) provided on the adjacent core member 20.

[0066] In this way, the connecting portion 38 is formed into a wavy shape when the insulator 14 is formed into a linear shape by resin molding, and when the insulator 14 is formed into an annular shape, the wavy shape is compressed into a flattened shape in the circumferential direction of the stator core 12. This eliminates the need to form a groove 42 (see Figure 8) at the boundary portion 40 of the core back portion 26 to allow the connecting portion 38 to escape, thereby ensuring the volume of the core back portion 26.

[0067] As shown in Figure 16, in the eighth embodiment, the connecting portion 38 can also be considered to have a configuration having a first protrusion 44 that protrudes from one first insulating portion 34A of the first insulating portions 34 provided on adjacent insulating portions 22 toward the other first insulating portion 34B, a second protrusion 46 that protrudes from the other first insulating portion 34B toward the one first insulating portion 34A, and a bending portion 48 that connects the tip end of the first protrusion 44 and the tip end of the second protrusion 46.

[0068] When the connecting portion 38 is configured to have the first protruding portion 44, the second protruding portion 46, and the bent portion 48 in this way, the position of bending stress generated in the connecting portion 38 can be the connection portion between the first protruding portion 44 and the bent portion 48, and the connection portion between the second protruding portion 46 and the bent portion 48. This makes it possible to alleviate the bending stress generated in the connecting portion 38 compared to when the first insulating portions 34 are directly connected to each other by the bent portion 48.

[0069] 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.

[0070] Below, supplementary notes are provided regarding the technology of the present disclosure. (Appendix 1) a stator core (12) configured by combining a plurality of core members (20) independent of one another in an annular shape; an insulator (14) which is a resin molded product having a plurality of insulating portions (22) respectively attached to the plurality of core members; a winding (16) wound around the stator core via the insulator; Equipped with Each of the core members is a core back portion (26) that constitutes an outer peripheral portion (30) of the stator core; a teeth portion (28) extending from the core back portion toward the inside in the radial direction of the stator core; and Each of the insulating portions is a first insulating portion (34) that covers the core back portion from the radially inner side of the stator core; a second insulating portion (36) covering the teeth portion; and a winding winding portion (24) is formed around each of the teeth by winding the winding around the second insulating portion, the insulator has a connecting portion (38) that is formed integrally with the insulating portion and connects the first insulating portions provided on adjacent insulating portions among the plurality of insulating portions, The connecting portion insulates a boundary portion (40) of the core back portion provided on the adjacent core member from the winding winding portion provided on the adjacent core member among the plurality of core members. Stator (10). (Appendix 2) The insulator is formed into an annular shape by deformation of each of the connecting portions from a linear shape formed in a straight line. 2. The stator of claim 1. (Appendix 3) a groove (42) recessed radially outward of the stator core is formed at a boundary between adjacent core back portions among the plurality of core back portions that each of the plurality of core members has, When the insulator is in the annular shape, the connecting portion is bent into a shape that forms a convex shape radially outward of the stator core and is accommodated inside the groove. 3. The stator according to claim 2. (Appendix 4) The connecting portion is bent into a shape that forms a convex shape radially inward of the stator core when the insulator is in the annular shape. 3. The stator according to claim 2. (Appendix 5) The connecting portion is formed in a straight line when the insulator is formed in the straight line shape. 5. The stator according to claim 3 or 4. (Appendix 6) The connecting portion is formed in a bent shape so as to form a convex shape radially outward of the stator core when the insulator is formed in the linear shape. 4. The stator of claim 3. (Appendix 7) The connecting portion is formed in a bent shape so as to form a convex shape radially inward of the stator core when the insulator is formed in the linear shape. 5. The stator of claim 4. (Appendix 8) The connecting portion is a first protrusion (44) protruding from one of the first insulating portions provided in the adjacent insulating portions toward the other first insulating portion; a second protruding portion (46) protruding from the other first insulating portion toward the one first insulating portion; a bent portion (48) that connects a tip end of the first protrusion and a tip end of the second protrusion and is formed in a bent shape so as to form a convex shape radially inward of the stator core when the insulator is formed in the linear shape; having 8. The stator of claim 7. (Appendix 9) the connecting portion is formed in a bellows shape when the insulator is formed in the linear shape, and the bellows shape is compressed in a crushed shape in the circumferential direction of the stator core when the insulator is formed in the annular shape. 3. The stator according to claim 2. (Appendix 10) The connecting portion is formed linearly when the insulator is formed into the linear shape, has a notch (50) that opens radially inward of the stator, and is compressed in a shape in which the width of the notch narrows in the circumferential direction of the stator core when the insulator is formed into the annular shape. 3. The stator according to claim 2. (Appendix 11) The connecting portion is formed in a wave shape when the insulator is formed into the linear shape, and the wave shape is compressed into a flattened shape in the circumferential direction of the stator core when the insulator is formed into the annular shape. 3. The stator according to claim 2. (Appendix 12) A method for manufacturing a stator according to any one of Supplementary Note 1 to Supplementary Note 11, an assembling step of assembling the core members to the insulating portions provided on the insulator, which is formed in a linear shape; a winding step of winding the winding around each of the teeth provided on the core members via the second insulating portion to form a plurality of the winding winding portions; a circularizing step of transforming the insulator from the linear form to an annular form by deforming each of the connecting portions, and combining a plurality of the core members into an annular form; A method for manufacturing a stator comprising: [Explanation of symbols]

[0071] 10... stator, 12... stator core, 14... insulator, 16... winding, 18... stator constituent member, 20... core member, 22... insulating portion, 24... winding winding portion, 26... core back portion, 26A... inner surface, 28... teeth portion, 28A... side surface, 28B... axial end face, 30... annular portion, 32... slot, 34... first insulating portion, 36... second insulating portion, 38... connecting portion, 40... boundary portion, 42... groove, 44... first protruding portion, 46... second protruding portion, 48... bent portion, 50... notch, 52... first notch, 54... second notch

Claims

1. a stator core (12) configured by combining a plurality of core members (20) independent of one another in an annular shape; an insulator (14) which is a resin molded product having a plurality of insulating portions (22) respectively attached to the plurality of core members; a winding (16) wound around the stator core via the insulator; Equipped with Each of the core members is a core back portion (26) that constitutes an outer peripheral portion (30) of the stator core; a tooth portion (28) extending from the core back portion toward the inside in the radial direction of the stator core; and Each of the insulating portions is a first insulating portion (34) that covers the core back portion from the radially inner side of the stator core; a second insulating portion (36) covering the teeth portion; and a winding winding portion (24) is formed around each of the teeth by winding the winding around the second insulating portion, the insulator has a connecting portion (38) that is formed integrally with the insulating portion and connects the first insulating portions provided on adjacent insulating portions among the plurality of insulating portions, The connecting portion insulates a boundary portion (40) of the core back portion provided on the adjacent core member from the winding winding portion provided on the adjacent core member among the plurality of core members. Stator (10).

2. The insulator is formed into an annular shape by deformation of each of the connecting portions from a linear shape formed in a straight line. The stator according to claim 1 .

3. a groove (42) recessed radially outward of the stator core is formed at a boundary between adjacent core back portions among the plurality of core back portions that each of the plurality of core members has, When the insulator is in the annular shape, the connecting portion is bent into a shape that forms a convex shape radially outward of the stator core and is accommodated inside the groove. The stator according to claim 2 .

4. The connecting portion is bent into a shape that forms a convex shape radially inward of the stator core when the insulator is in the annular shape. The stator according to claim 2 .

5. The connecting portion is formed in a straight line when the insulator is formed in the straight line shape.

5. The stator according to claim 3 or claim 4.

6. The connecting portion is formed in a bent shape so as to form a convex shape radially outward of the stator core when the insulator is formed in the linear shape. The stator according to claim 3 .

7. The connecting portion is formed in a bent shape so as to form a convex shape radially inward of the stator core when the insulator is formed in the linear shape.

5. The stator according to claim 4.

8. The connecting portion is a first protrusion (44) protruding from one of the first insulating portions provided in the adjacent insulating portions toward the other first insulating portion; a second protrusion (46) protruding from the other first insulating portion toward the one first insulating portion; a bent portion (48) that connects a tip end portion of the first protrusion and a tip end portion of the second protrusion and is formed in a bent shape so as to form a convex shape radially inward of the stator core when the insulator is formed into the linear shape; having 8. The stator according to claim 7.

9. the connecting portion is formed in a bellows shape when the insulator is formed in the linear shape, and the bellows shape is compressed in a crushed shape in the circumferential direction of the stator core when the insulator is formed in the annular shape. The stator according to claim 2 .

10. The connecting portion is formed linearly when the insulator is formed into the linear shape, has a notch (50) that opens radially inward of the stator, and is compressed in a shape in which the width of the notch narrows in the circumferential direction of the stator core when the insulator is formed into the annular shape. The stator according to claim 2 .

11. The connecting portion is formed in a wave shape when the insulator is formed into the linear shape, and the wave shape is compressed into a flattened shape in the circumferential direction of the stator core when the insulator is formed into the annular shape. The stator according to claim 2 .

12. A method for manufacturing a stator according to claim 1, an assembling step of assembling the core members to the insulating portions provided on the insulator, which is formed in a linear shape; a winding step of winding the winding around each of the teeth provided on the core members via the second insulating portion to form a plurality of winding portions; a circularizing step of transforming the insulator from the linear form to an annular form by deforming each of the connecting portions, and combining a plurality of the core members into an annular form; A method for manufacturing a stator comprising:

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