Stator

Abstract

To suppress damages of a fixed end of a cantilever piece.SOLUTION: An insulator cover (20) is assembled to an insulator (20) by a snap-fit structure (40). The snap-fit structure, includes: a cantilever piece (42) that is extended in a peripheral direction of a stator (10) as an extension direction, and in which a one end part of the extension direction is a fixed end (42A), and the other end part of the extended direction is a freedom end (42B); an engagement part (44) that is formed to a part on the freedom end side of the cantilever piece; and an engaged part (46) that is formed to the insulator, and in which the engagement part is engaged from the other side of a shaft direction of the stator.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present disclosure relates to a stator for a rotating electric machine. [Background technology]

[0002] As a stator of a rotating electric machine, for example, the following is known. That is, Patent Document 1 discloses a stator (stator 1) including a plurality of teeth (teeth 4), an insulator (insulating member 7) attached to the plurality of teeth, a winding (winding 6) wound around the plurality of teeth via the insulator, and an insulator cover (insulating cover 9) covering the winding from one axial side of the stator. The insulator cover is attached to the insulator by a snap-fit ​​structure. The snap-fit ​​structure has a cantilever (outer diameter wall 9a) that extends in the axial direction of the stator, one end in the extending direction being a fixed end and the other end in the extending direction being a free end, a locking portion (locking portion 9d) formed at the free end of the cantilever, and a locked portion (locking portion of outer peripheral side wall 7a) formed on the insulator, with which the locking portion is locked from the other axial side of the stator. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-045951 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the process of assembling the insulator cover to the insulator from one axial side of the stator, the cantilever is deformed as the locking portion overcomes the locked portion. Here, in a configuration in which the cantilever extends in the axial direction of the stator, the length of the cantilever is short, so that the stress acting on the fixed end of the cantilever increases, and there is a risk that the fixed end of the cantilever will be damaged.

[0005] An object of the present disclosure is to provide a stator that can prevent damage to the fixed end of the cantilever. [Means for solving the problem]

[0006] One aspect of the present disclosure is a stator (10) for a rotating electric machine, the stator (10) comprising: a stator core (18) having a plurality of teeth (28); an insulator (20) attached to the plurality of teeth; a winding (22) having a plurality of winding portions (34) wound around the plurality of teeth via the insulator; and an insulator cover (16) covering the plurality of winding portions from one axial side of the stator, the insulator cover having a snap-fit ​​structure (40 The snap-fit ​​structure is a stator having a cantilever (42) extending in the circumferential direction of the stator, one end in the extending direction being a fixed end (42A) and the other end in the extending direction being a free end (42B), a locking portion (44) formed on a portion of the cantilever on the free end side, and a locked portion (46) formed on the insulator, with which the locking portion locks from the other axial side of the stator. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a side view of a stator according to an embodiment of the present disclosure. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. 2 is a vertical cross-sectional view of the stator. [Figure 6] FIG. 2 is an exploded perspective view including an enlarged view of a main portion of the stator. [Figure 7] FIG. [Figure 8] FIG. 11 is a plan view diagrammatically showing a stator according to a first modified example. [Figure 9]FIG. 11 is an explanatory diagram showing a stator according to a second modified example for comparison. [Figure 10] FIG. 13 is a plan view diagrammatically showing a stator according to a third modified example. [Figure 11] FIG. 13 is an explanatory diagram showing, in comparison, a stator according to a fourth modified example. [Figure 12] FIG. 13 is a plan view showing an insulator cover according to a fifth modified example. [Figure 13] FIG. 13 is a perspective view showing an insulator according to a fifth modified example. [Figure 14] FIG. 13 is an exploded perspective view showing a stator according to a sixth modified example. [Figure 15] FIG. 13 is a vertical cross-sectional view that illustrates a schematic view of a main portion of a stator according to a sixth modified example. [Figure 16] FIG. 13 is an exploded perspective view showing a stator according to a seventh modified example. [Figure 17] FIG. 13 is a plan view of a stator body according to a seventh modified example. [Figure 18] FIG. 13 is a perspective view of a stator according to an eighth modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings.

[0009] FIG. 1 shows a stator 10 according to an embodiment of the present disclosure. The stator 10 is a so-called split-core type stator. The basic configuration of a split-core type stator is described in Japanese Patent No. 5502115. The stator 10 is applied to an inner rotor type brushless motor, as an example of a rotating electric machine. That is, a rotor (not shown) is rotatably housed inside the stator 10, and the stator 10 and the rotor form a brushless motor.

[0010] In each drawing, an arrow A1 indicates one axial side of the stator 10, and an arrow A2 indicates the other axial side of the stator 10.

[0011] 1 and 2, the stator 10 includes a stator body 14 and an insulator cover 16. As shown in FIG.

[0012] The stator core 18 is composed of a plurality of core constituent members 24 divided in the circumferential direction of the stator core 18. Each core constituent member 24 has a yoke constituent portion 26 and teeth portions 28. The yoke constituent portion 26 is a portion that constitutes a yoke 30, which is a portion on the outer circumferential side of the stator core 18. The teeth portions 28 extend from the yoke constituent portion 26 toward the inside in the radial direction of the stator core 18.

[0013] The insulator 20 has a plurality of insulating parts 32. Each insulating part 32 is attached to the tooth part 28, and covers the side surface of the tooth part 28 and the inner surface of the yoke constituent part 26. The winding 22 has a plurality of winding parts 34 wound around the plurality of teeth parts 28 via the insulator 20 (more specifically, each insulating part 32). As an example, each winding part 34 is wound around each tooth part 28 by a concentrated winding method.

[0014] 2, the insulator cover 16 is attached to the stator body 14 from one axial side of the stator 10. When attached to the stator body 14, the insulator cover 16 is configured to cover the multiple winding portions 34 from one axial side of the stator 10. The insulator cover 16 has a top wall portion 36 and a peripheral wall portion 38. The peripheral wall portion 38 is formed around the top wall portion 36 and extends from the top wall portion 36 toward the other axial side of the stator 10.

[0015] As shown in Figs. 4 and 5, the insulator cover 16 is attached to the insulator 20 by a plurality of snap-fit ​​structures 40. The plurality of snap-fit ​​structures 40 are provided on the outer periphery of the stator 10. The number of the plurality of snap-fit ​​structures 40 is set to a multiple of a divisor of the number of the plurality of teeth portions 28. In the present embodiment, as an example, the number of the plurality of teeth portions 28 (in other words, the number of slots between the plurality of teeth portions 28) is 12, and the number of the plurality of snap-fit ​​structures 40 is set to 3. Each snap-fit ​​structure 40 has a cantilever piece 42, a locking portion 44, and a locked portion 46.

[0016] The cantilever 42 extends in the circumferential direction of the stator 10 (the direction of the arrow R). The cantilever 42 is formed by a part of the peripheral wall 38 of the insulator cover 16. The cantilever 42 is separated from the top wall 36 over the entire length in the extension direction. One end of the cantilever 42 in the extension direction is a fixed end 42A, and the other end of the cantilever 42 in the extension direction is a free end 42B. The cantilever 42 is formed in an arc shape along the circumferential direction of the stator 10.

[0017] The locking portion 44 is formed on the free end 42B side of the cantilever 42. More specifically, the locking portion 44 is formed on the other axial end of the stator 10 in the free end 42B side of the cantilever 42 (see FIG. 5). The locking portion 44 is formed in a protrusion shape (in other words, a hook shape) that protrudes from the free end 42B of the cantilever 42 toward the inside in the radial direction of the stator 10.

[0018] The locked portion 46 is formed on the insulator 20. The locked portion 46 is formed in a protrusion shape that protrudes from the insulator 20 toward the outside in the radial direction of the stator 10. The locking portion 44 is locked to the locked portion 46 from the other axial side of the stator 10, so that the insulator cover 16 is prevented from coming off the insulator 20.

[0019] Let L [mm] be the length of the cantilever 42 along the circumferential direction of the stator 10, δ [mm] be the displacement of the cantilever 42 when the engaging portion 44 overcomes the engaged portion 46 during the process of assembling the insulator cover 16 to the insulator 20 from one axial side of the stator 10, E [MPa] be the Young's modulus of the cantilever 42, t [mm] be the plate thickness of the cantilever 42, and σ [Pa] be the stress acting on the fixed end 42A of the cantilever 42, then σ can be calculated using equation (1). σ=δEt / L 2 (1)

[0020] In this embodiment, the cantilever 42 of the snap-fit ​​structure 40 extends in the circumferential direction of the stator 10. Therefore, for example, the length of the cantilever 42 can be made longer than when the cantilever 42 extends in the axial direction of the stator 10. As a result, even if the cantilever 42 is deformed by the locking portion 44 climbing over the locked portion 46 during the process of assembling the insulator cover 16 to the insulator 20 from one axial side of the stator 10, the stress acting on the fixed end 42A of the cantilever 42 can be reduced.

[0021] The snap-fit ​​structures 40 include a first snap-fit ​​structure 40A having a cantilever 42 whose fixed end 42A is located on one side of the stator 10 in the circumferential direction relative to the free end 42B, and a second snap-fit ​​structure 40B having a cantilever 42 whose fixed end 42A is located on the other side of the stator 10 in the circumferential direction relative to the free end 42B. In this embodiment, as an example, the snap-fit ​​structures 40 include two first snap-fit ​​structures 40A and one second snap-fit ​​structure 40B. Each first snap-fit ​​structure 40A has the same configuration, and the first snap-fit ​​structure 40A and the second snap-fit ​​structure 40B have the same configuration except for the orientation. The multiple locking portions 44 are provided at equal intervals in the circumferential direction of the stator 10.

[0022] 6 and 7, the insulator cover 16 has an engaging portion 48, and the stator core 18 has an engaged portion 50. The engaging portion 48 is formed on the outer periphery of the insulator cover 16, and the engaged portion 50 is formed on the outer periphery of the stator core 18.

[0023] The engaging portion 48 is formed by a protrusion protruding from the insulator cover 16 toward the other axial side of the stator 10. As an example, the engaging portion 48 is formed in a rectangular prism shape, but may be formed in a cylindrical or wedge shape. A groove 52 is formed in the outer periphery of the stator core 18, which opens radially outward of the stator 10 and extends in the axial direction of the stator 10, and the engaged portion 50 is formed by an opening formed at an end of the groove 52. The opening opens toward one axial side of the stator 10. When the insulator cover 16 is assembled to the insulator 20 by the multiple snap-fit ​​structures 40, the engaging portion 48 engages with the engaged portion 50, so that the insulator cover 16 is positioned in the circumferential direction of the stator 10 relative to the insulator 20.

[0024] Next, the effects of this embodiment will be described.

[0025] As described above in detail, in the stator 10 according to this embodiment, the cantilever 42 of the snap-fit ​​structure 40 extends in the circumferential direction of the stator 10. Therefore, for example, the length of the cantilever 42 can be made longer than when the cantilever 42 extends in the axial direction of the stator 10. As a result, even if the cantilever 42 is deformed by the locking portion 44 climbing over the locked portion 46 during the process of assembling the insulator cover 16 to the insulator 20 from one axial side of the stator 10, the stress acting on the fixed end 42A of the cantilever 42 can be reduced, and therefore damage to the fixed end 42A of the cantilever 42 can be suppressed.

[0026] In other words, the stress acting on the fixed end 42A of the cantilever 42 is inversely proportional to the square of the length of the cantilever 42, so by extending the cantilever 42 in the circumferential direction of the stator 10 and increasing the length of the cantilever 42, the stress acting on the fixed end 42A of the cantilever 42 can be reduced, thereby preventing damage to the fixed end 42A of the cantilever 42.

[0027] Furthermore, for example, when the cantilever 42 extends in the axial direction of the stator 10, if the deformation amount of the cantilever 42 increases due to axial misalignment of the insulator cover 16 with respect to the insulator 20, the stress acting on the fixed end 42A of the cantilever 42 increases, and therefore positioning accuracy of the insulator cover 16 is required. However, as in this embodiment, when the cantilever 42 extends in the circumferential direction of the stator 10, even if the deformation amount of the cantilever 42 increases due to axial misalignment of the insulator cover 16 with respect to the insulator 20, the increase in the stress acting on the fixed end 42A of the cantilever 42 can be suppressed, and therefore the requirement for positioning accuracy of the insulator cover 16 can be avoided.

[0028] In addition, the cantilever 42 is formed in an arc shape along the circumferential direction of the stator 10. This allows the length of the cantilever 42 to be longer than when the cantilever 42 is formed in a straight line along the tangential direction of the stator 10, for example, and therefore the stress acting on the fixed end 42A of the cantilever 42 can be reduced.

[0029] Furthermore, the stator 10 includes a plurality of snap-fit ​​structures 40, and the number of the plurality of snap-fit ​​structures 40 is a multiple of a divisor of the number of the plurality of teeth portions 28. This makes it possible to prevent the locked portion 46 from being positioned in a slot between the teeth portions 28, and allows the locked portion 46 to be formed in a portion of the insulator 20 corresponding to the teeth portions 28 (i.e., the insulating portion 32).

[0030] Moreover, the multiple locking portions 44 are provided at equal intervals in the circumferential direction of the stator 10. This makes it possible to equalize the stress acting on each of the locking portions 44. This makes it possible to prevent stress from concentrating on any one of the locking portions 44.

[0031] Furthermore, the insulator cover 16 has engaging portions 48 which are protrusions that protrude in the axial direction of the stator 10, and the stator core 18 has engaged portions 50 which engage with the engaging portions 48. Therefore, when the insulator cover 16 is assembled to the insulator 20 by the plurality of snap-fit ​​structures 40, the insulator cover 16 can be positioned in the circumferential direction of the stator 10 relative to the insulator 20 by engaging the engaging portions 48 with the engaged portions 50. This improves the workability when assembling the insulator cover 16 to the insulator 20 by the plurality of snap-fit ​​structures 40.

[0032] In addition, the snap-fit ​​structure 40 is provided on the outer periphery of the stator 10. As a result, the length of the cantilever 42 can be made longer than in the case where the snap-fit ​​structure 40 is provided on the inner periphery of the stator 10, and therefore the stress acting on the fixed end 42A of the cantilever 42 can be reduced.

[0033] Next, a modification of this embodiment will be described.

[0034] (First Modification) In the above embodiment, the multiple snap-fit ​​structures 40 include a first snap-fit ​​structure 40A having a cantilever 42 whose fixed end 42A is located on one circumferential side of the stator 10 relative to the free end 42B, and a second snap-fit ​​structure 40B having a cantilever 42 whose fixed end 42A is located on the other circumferential side of the stator 10 relative to the free end 42B. However, as shown in Fig. 8, each of the multiple snap-fit ​​structures 40 may have a cantilever 42 whose fixed end 42A is located on one circumferential side of the stator 10 relative to the free end 42B.

[0035] (Second Modification) In the above embodiment, the number of the snap-fit ​​structures 40 is, for example, three, but may be any number other than three as long as it is a multiple of a divisor of the number of the teeth portions 28. For example, Fig. 9(A) shows an example in which the number of the snap-fit ​​structures 40 is two and the two snap-fit ​​structures 40 are provided at 180° intervals, Fig. 9(B) shows an example in which the number of the snap-fit ​​structures 40 is four and the four snap-fit ​​structures 40 are provided at 90° intervals, Fig. 9(C) shows an example in which the number of the snap-fit ​​structures 40 is six and the six snap-fit ​​structures 40 are provided at 60° intervals, and Fig. 9(D) shows an example in which the number of the snap-fit ​​structures 40 is twelve and the twelve snap-fit ​​structures 40 are provided at 30° intervals.

[0036] In the above embodiment, the number of the teeth 28 is 12, but the number of the teeth 28 may be other than 12. For example, the number of the teeth 28 may be 6 or 18. When the number of the teeth 28 is 6, the number of the snap-fit ​​structures 40 may be 2, 3, or 6. When the number of the teeth 28 is 12, the number of the snap-fit ​​structures 40 may be 2, 3, 4, 6, or 12. When the number of the teeth 28 is 18, the number of the snap-fit ​​structures 40 may be 2, 3, 6, 9, or 18. When the number of the teeth 28 is 15, the number of the snap-fit ​​structures 40 may be 3, 5, or 15.

[0037] (Third Modification) In the above embodiment, the multiple locking portions 44 are provided at equal intervals in the circumferential direction of the stator 10. However, as shown in Fig. 10, the multiple locking portions 44 (in other words, the multiple cantilevers 42 facing the same direction) may be provided at unequal intervals in the circumferential direction of the stator 10.

[0038] In the above embodiment, one snap-fit ​​structure 40 is assigned to each of three of the multiple teeth portions 28, but any number of snap-fit ​​structures 40 may be assigned to one tooth portion 28. The multiple snap-fit ​​structures 40 assigned to one tooth portion 28 may be aligned in the circumferential direction of the stator 10 or in the axial direction of the stator 10.

[0039] (Fourth Modification) In the above embodiment, each snap-fit ​​structure 40 is provided on the outer periphery of the stator 10. For example, FIG. 11(A) shows an example in which each snap-fit ​​structure 40 having a cantilever 42 with a fixed end 42A located on one circumferential side of the stator 10 with respect to a free end 42B is provided on the outer periphery of the stator 10. In contrast, as shown in FIG. 11(B), each snap-fit ​​structure 40 may be provided on the inner periphery of the stator 10. Even if each snap-fit ​​structure 40 is provided on the inner periphery of the stator 10, the length of the cantilever 42 can be made longer than when the cantilever 42 extends in the axial direction of the stator 10.

[0040] (Fifth Modification) In the above embodiment, the insulator cover 16 has the engaging portion 48 which is a protrusion that protrudes in the axial direction of the stator 10, and the stator core 18 has the engaged portion 50 which is an opening that opens in the axial direction of the stator 10. However, as shown in Fig. 12, the insulator cover 16 may have an engaging portion 90 which is an opening that opens in the axial direction of the stator 10. The engaging portion 90 is formed on the inner periphery (part on the inner periphery side) of the insulator cover 16, as one example.

[0041] 13, the insulator 20 may have an engaged portion 92 which is a protrusion that protrudes in the axial direction of the stator 10. The insulator 20 has a connecting portion 94 which connects the inner peripheral side portions of the multiple insulating portions 32, and the engaged portion 92 is formed on the connecting portion 94. The engaging portion 90 may engage with the engaged portion 92, thereby positioning the insulator cover 16 relative to the insulator 20 in the circumferential direction of the stator 10. Even with this configuration, the workability can be improved when assembling the insulator cover 16 to the insulator 20 by the multiple snap-fit ​​structures 40.

[0042] 12 and 13, the engaging portion 90 formed on the insulator cover 16 may be a protrusion protruding in the axial direction of the stator 10, and the engaged portion 92 formed on the stator core 18 may be an opening opening in the axial direction of the stator 10. In the above embodiment, the engaging portion 48 formed on the insulator cover 16 may be an opening opening in the axial direction of the stator 10, and the engaged portion 50 formed on the stator core 18 may be a protrusion protruding in the axial direction of the stator 10.

[0043] (Sixth Modification) 14 and 15 , the cantilever 42 may have an engaging portion 96 which is an opening that opens in the radial direction of the stator 10, and the insulator 20 may have an engaged portion 98 which is a protruding portion that protrudes in the radial direction of the stator 10. The engaging portion 96 may engage with the engaged portion 98, thereby positioning the insulator cover 16 relative to the insulator 20 in the circumferential direction of the stator 10. Even with this configuration, the workability can be improved when assembling the insulator cover 16 to the insulator 20 by the multiple snap-fit ​​structures 40.

[0044] The engaging portion 96 may be a protrusion that protrudes in the radial direction of the stator 10, and the engaged portion 98 may be an opening that opens in the radial direction of the stator 10.

[0045] (Seventh Modification) 16 and 17, the insulator cover 16 may have a plurality of insulating walls 100 inserted between the plurality of winding parts 34. The number of the insulating walls 100 is the same as the number of the plurality of teeth parts 28 (in other words, the number of slots between the plurality of teeth parts 28). Each insulating part 32 reaches the lower end of the winding part 34 (i.e., the end of the winding part 34 on the opposite side to the insulator cover 16). When the insulator cover 16 has a plurality of insulating walls 100 in this way, the insulation of the adjacent winding parts 34 can be improved. Also, since there is no need to provide insulating paper between the adjacent winding parts 34, the number of steps in assembling the stator 10 can be reduced.

[0046] (Eighth Modification) In the above embodiment, when the insulator cover 16 is attached to the insulator 20 by the multiple snap-fit ​​structures 40, the engaging portions 48 engage with the engaged portions 50, thereby positioning the insulator cover 16 in the circumferential direction of the stator 10 relative to the insulator 20. However, as shown in Fig. 18, the insulator cover 16 may be positioned in the circumferential direction of the stator 10 relative to the insulator 20 by inserting a rod-shaped jig 104 into a V-shaped recess 102 provided in the insulator cover 16 and a groove 52 formed in the stator core 18.

[0047] Among the above multiple modified examples, modified examples that can be combined may be combined as appropriate.

[0048] While one embodiment of the present disclosure has been described above, the present disclosure is not limited to the above, and it goes without saying that the present disclosure can be implemented in various modified forms without departing from the spirit and scope of the present disclosure.

[0049] With respect to the present disclosure, the following notes are disclosed. (Appendix 1) A stator (10) for a rotating electric machine, comprising: a stator core (18) having a plurality of teeth (28); an insulator (20) attached to the plurality of teeth portions; a winding (22) having a plurality of winding portions (34) wound around the plurality of teeth portions via the insulator; an insulator cover (16) that covers the plurality of winding portions from one axial side of the stator; Equipped with The insulator cover is attached to the insulator by a snap-fit ​​structure (40), The snap-fit ​​structure is a cantilever (42) extending in a circumferential direction of the stator, one end of the cantilever (42) being a fixed end (42A) and the other end of the cantilever (42) being a free end (42B); A locking portion (44) formed on the free end side portion of the cantilever; a locked portion (46) formed on the insulator, the locking portion being locked from the other axial side of the stator; having Stator. (Appendix 2) The cantilever is formed in an arc shape along the circumferential direction of the stator. 2. The stator of claim 1. (Appendix 3) A plurality of said snap-fit ​​structures are provided, The number of the snap-fit ​​structures is a multiple of a divisor of the number of the teeth portions. 3. The stator according to claim 1 or 2. (Appendix 4) A plurality of said snap-fit ​​structures are provided, The plurality of locking portions are provided at equal intervals in the circumferential direction of the stator. 4. The stator according to claim 1 , (Appendix 5) The insulator cover has an engagement portion (48) which is an opening portion that opens in the axial direction of the stator or a protrusion portion that protrudes in the axial direction of the stator, The stator core has an engaged portion (50) that engages with the engaging portion. 5. The stator according to claim 1 , (Appendix 6) The insulator cover has an engagement portion (90) which is an opening portion that opens in the axial direction of the stator or a protrusion portion that protrudes in the axial direction of the stator, The insulator has an engaged portion (92) that engages with the engaging portion. 5. The stator according to claim 1 , (Appendix 7) The cantilever has an engagement portion (96) which is an opening portion that opens in a radial direction of the stator or a protrusion portion that protrudes in the radial direction, The insulator has an engaged portion (98) that engages with the engaging portion. 5. The stator according to claim 1 , (Appendix 8) The snap-fit ​​structure is provided on an outer periphery of the stator. 8. The stator according to claim 1 , (Appendix 9) The snap-fit ​​structure is provided on an inner periphery of the stator. 8. The stator according to claim 1 , (Appendix 10) The insulator cover has an insulating wall (100) inserted between the plurality of winding portions. 10. The stator according to any one of claims 1 to 9. [Explanation of symbols]

[0050] 10... stator, 14... stator body, 16... insulator cover, 18... stator core, 20... insulator, 22... winding, 24... core component, 26... yoke component, 28... teeth portion, 30... yoke, 32... insulating portion, 34... winding portion, 36... top wall portion, 38... peripheral wall portion, 40... snap-fit ​​structure, 40A... first snap-fit ​​structure, 40B... second snap-fit ​​structure, 42... cantilever, 42A... fixed end, 42B... free end, 44... engaging portion, 46... engaged portion, 48... engaging portion, 50... engaged portion, 52... groove, 90... engaging portion, 92... engaged portion, 94... connecting portion, 96... engaging portion, 98... engaged portion, 100... insulating wall, 102... recess, 104... jig

Claims

1. A stator (10) for a rotating electric machine, comprising: A stator core (18) having a plurality of teeth portions (28); an insulator (20) attached to the plurality of teeth portions; a winding (22) having a plurality of winding portions (34) wound around the plurality of teeth portions via the insulator; an insulator cover (16) that covers the plurality of winding portions from one axial side of the stator; Equipped with The insulator cover is attached to the insulator by a snap-fit ​​structure (40); The snap-fit ​​structure is A cantilever (42) extending in a circumferential direction of the stator, one end of the cantilever (42A) being a fixed end and the other end of the cantilever (42) being a free end; A locking portion (44) formed on the free end side portion of the cantilever; a locked portion (46) formed on the insulator, the locking portion being locked from the other axial side of the stator; having Stator.

2. The cantilever is formed in an arc shape along the circumferential direction of the stator. The stator according to claim 1 .

3. A plurality of said snap-fit ​​structures are provided, The number of the snap-fit ​​structures is a multiple of a divisor of the number of the teeth portions. The stator according to claim 1 .

4. A plurality of said snap-fit ​​structures are provided, The plurality of locking portions are provided at equal intervals in the circumferential direction of the stator. The stator according to claim 1 .

5. The insulator cover has an engagement portion (48) which is an opening portion that opens in the axial direction of the stator or a protrusion portion that protrudes in the axial direction of the stator, The stator core has an engaged portion (50) that engages with the engaging portion. The stator according to claim 1 .

6. The insulator cover has an engagement portion (90) which is an opening portion that opens in the axial direction of the stator or a protrusion portion that protrudes in the axial direction of the stator, The insulator has an engaged portion (92) that engages with the engaging portion. The stator according to claim 1 .

7. The cantilever has an engagement portion (96) which is an opening portion that opens in a radial direction of the stator or a protrusion portion that protrudes in the radial direction, The insulator has an engaged portion (98) that engages with the engaging portion. The stator according to claim 1 .

8. The snap-fit ​​structure is provided on an outer periphery of the stator. The stator according to claim 1 .

9. The snap-fit ​​structure is provided on an inner periphery of the stator. The stator according to claim 1 .

10. The insulator cover has an insulating wall (100) inserted between the plurality of winding portions. The stator according to claim 1 .

Images