Stator

Abstract

To provide a stator capable of suppressing a decrease in the space factor of a winding portion.SOLUTION: A stator (10) is composed of a plurality of stator components (12), each of which includes a ring-shaped yoke (20), a plurality of core components (14) each having a yoke component (22) divided in the circumferential direction of the yoke, a tooth portion (24) protruding from the yoke component toward the radial inside of the yoke, a winding (16) having a winding portion (26) wound around the tooth portion, and an insulator (18) attached to the core component and having a plurality of insulating portions (30) that insulate the tooth portion from the winding portion and a connecting portion (32) that connects the plurality of insulating portions together. Each stator component has a holding portion (38) that holds an end portion (28) of the winding provided on another stator component.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The technology of the present disclosure relates to a stator. [Background technology]

[0002] Conventionally, so-called split-core type stators have been known (see, for example, Patent Document 1). A split-core type stator is composed of multiple stator components. Each stator component includes multiple core component members, windings, and insulators. Each core component member forms an annular yoke and has yoke component members divided in the circumferential direction of the yoke and teeth portions protruding from the yoke component members radially inward of the yoke. The windings have winding portions wound around the teeth portions. The insulators have multiple insulating portions and connecting portions. Each insulating portion is attached to a core component member and insulates the teeth portions from the winding portions. The connecting portions connect the multiple insulating portions together. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-35260 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional stators, the holding portion that holds the end portion of the winding is formed in the insulating portion, and therefore, the holding portion is located in the space where the winding portion is wound, reducing the space factor of the winding portion.

[0005] The technique of the present disclosure aims to provide a stator that can suppress a decrease in the space factor of the winding portion. [Means for solving the problem]

[0006] The stator (10) according to the disclosed technology is constituted by a plurality of stator components (12), each of which comprises a ring-shaped yoke (20), a plurality of core components (14) each having yoke components (22) divided in the circumferential direction of the yoke, and teeth (24) protruding from the yoke components radially inward of the yoke, a winding (16) having a winding portion (26) wound around the teeth, and an insulator (18) attached to the core component and having a plurality of insulating portions (30) that insulate the teeth and the winding portion, and connecting portions (32) that connect the plurality of insulating portions together, and the connecting portions of each of the stator components have holding portions (38) that hold terminal portions (28) of the windings provided on the other stator components.

[0007] According to the technique of the present disclosure, a stator is provided that can suppress a decrease in the space factor of the winding portion. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a stator according to an embodiment of the disclosed technology. [Figure 2] FIG. 10 is a perspective view showing a state in which a plurality of stator components are shifted in the axial direction. [Figure 3] FIG. 2 is a perspective view of a U-phase stator component. [Figure 4] FIG. 2 is a perspective view of a V-phase stator component. [Figure 5] FIG. 2 is a perspective view of a W-phase stator component. [Figure 6] FIG. 2 is an enlarged perspective view of a main part of the stator. [Figure 7] FIG. 2 is an enlarged plan view of a main part of a stator component. [Figure 8] FIG. 10 is an enlarged perspective view of a main part of a stator according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of the technology of the present disclosure will be described below.

[0010] 1 to 5 show the configuration of a stator 10 according to one embodiment of the technology of the present disclosure. The stator 10 according to this embodiment is a so-called split-core type stator. The basic configuration of a split-core type stator is described in Patent Document 1. The stator 10 is applied to an inner-rotor type brushless motor. That is, a rotor (not shown) is rotatably housed inside the stator 10, and the stator 10 and the rotor form a brushless motor.

[0011] The stator 10 is composed of a plurality of stator components 12. The stator 10 has U-phase, V-phase, and W-phase, and the number of the plurality of stator components 12 corresponds to the number of U-phase, V-phase, and W-phase. That is, the stator 10 includes a U-phase stator component 12 (12U), a V-phase stator component 12 (12V), and a W-phase stator component 12 (12W). The plurality of stator components 12 are integrated by being assembled together in the axial direction of the stator 10. Each stator component 12 includes a plurality of core components 14, a winding 16, and an insulator 18.

[0012] Each core component 14 forms a ring-shaped yoke 20 (see Figure 1) and has a yoke component portion 22 divided circumferentially around the yoke 20, and teeth portions 24 protruding from the yoke component portion 22 radially inward of the yoke 20.

[0013] The winding 16 has a plurality of winding portions 26 wound around each tooth portion 24, crossover wires (not shown) connecting the plurality of winding portions 26 together, and a terminal portion 28. In each drawing, the winding portions 26 are indicated by imaginary lines (two-dot chain lines). The terminal portion 28 is the terminal portion at the start or end of the winding of the winding 16. The terminal portion 28 is connected to, for example, a circuit board (not shown) provided in the brushless motor.

[0014] The insulator 18 has a plurality of insulating portions 30 and a connecting portion 32. Each insulating portion 30 is attached to the core component member 14 and insulates the tooth portion 24 from the winding portion 26. The connecting portion 32 connects the plurality of insulating portions 30 together. The portion of the insulator 18 other than the plurality of insulating portions 30 is the connecting portion 32.

[0015] The connecting portion 32 has an annular portion 34, a plurality of extending portions 36, and a retaining portion 38. The annular portion 34 is formed in a circular ring shape along the circumferential direction of the insulator 18. The extending portions 36 extend from the annular portion 34 toward the insulating portion 30 (i.e., radially outward from the connecting portion 32). The tip ends of the extending portions 36 are connected to the insulating portion 30.

[0016] The retaining portion 38 is formed on one of a plurality of extending portions 36 formed on the insulator 18 of the stator component 12 of each phase. The retaining portion 38 provided on the stator component 12 of each phase holds the terminal portion 28 provided on the stator component 12 of the other phase. Specifically, the retaining portion 38 provided on the U-phase stator component 12 (12U) holds the terminal portion 28 provided on the W-phase stator component 12 (12W), the retaining portion 38 provided on the V-phase stator component 12 (12V) holds the terminal portion 28 provided on the U-phase stator component 12 (12U), and the retaining portion 38 provided on the W-phase stator component 12 (12W) holds the terminal portion 28 provided on the V-phase stator component 12 (12V).

[0017] Fig. 6 shows an enlarged view of a main portion of the stator 10. Fig. 7 shows an enlarged view of a main portion of the stator component 12. More specifically, the extension portion 36 has a radial extension portion 40 and an axial extension portion 42. The radial extension portion 40 extends from the annular portion 34 radially outward (toward arrow A1) of the stator component 12, and the axial extension portion 42 extends from the tip of the radial extension portion 40 to the other axial side (toward arrow B2) of the stator component 12.

[0018] In the stator component 12 of each phase, the retaining portion 38 is located on one side (the side indicated by the arrow C1) of one extension portion 36 in the circumferential direction of the stator component 12. The retaining portion 38 is located within a range R of the axial dimension of the connecting portion 32 (specifically, the extension portion 36).

[0019] The terminal portion 28 of each phase is led out from the winding portion 26 to one axial side (arrow B1 side) of the stator component 12. The holding portion 38 holds the terminal portion 28 of the other phase on the one axial side (arrow B1 side) of the stator component 12 relative to the winding portion 26. Specifically, the holding portion 38 has an arm portion 44 extending from an axial extending portion 42 of one of the extending portions 36, and a bent portion 46 formed at the tip of the arm portion 44.

[0020] The tip of the arm 44 supports the terminal 28 from the direction in which the terminal 28 springs back (the direction of the arrow D1) relative to the terminal 28. The arm 44 is made of an elastic piece having elasticity. The bent portion 46 is formed at the tip of the arm 44 and is bent toward the terminal 28 relative to the tip of the arm 44. The bent portion 46 supports the terminal 28 from the radial outside of the stator component 12.

[0021] Next, the operation and effects of this embodiment will be described.

[0022] As described above in detail, in the stator 10 according to this embodiment, the connecting portion 32 of the stator components 12 of each phase has the retaining portion 38 that retains the terminal portion 28 provided on the stator components 12 of the other phases. This makes it possible to prevent the retaining portion 38 from being positioned in the space S (see FIG. 7 ) around which the winding portion 26 is wound, as would be the case if the retaining portion 38 were formed in the insulating portion 30. This makes it possible to prevent a decrease in the space factor of the winding portion 26 compared to when the retaining portion 38 is formed in the insulating portion 30.

[0023] Furthermore, the terminal portion 28 of each phase is led out from the winding portion 26 to one axial side (arrow B1 side) of the stator component 12, and the holding portion 38 holds the terminal portion 28 of the other phase on the one axial side (arrow B1 side) of the stator component 12 relative to the winding portion 26. This makes it possible to prevent the holding portion 38 from interfering with the winding portion 26 of the other phase. Furthermore, even when assembling multiple stator components 12 from the axial direction (see FIG. 2), the holding portion 38 can hold the terminal portion 28 of the other phase, thereby improving the ease of assembling the multiple stator components 12.

[0024] Furthermore, the retaining portion 38 has an arm portion 44 extending from the extending portion 36 and a bent portion 46 formed at the tip of the arm portion 44. The bent portion 46 is bent toward the terminal portion 28 relative to the tip of the arm portion 44. The tip of the arm portion 44 supports the terminal portion 28 from the direction in which the terminal portion 28 springs back relative to the terminal portion 28 (the direction of the arrow D1), and the bent portion 46 supports the terminal portion 28 from the radially outer side of the stator component 12. This prevents the terminal portion 28 from coming off the retaining portion 38 due to springback.

[0025] Furthermore, the arm portions 44 are elastic. Therefore, for example, when assembling a plurality of stator components 12 (see FIG. 2), even if stress acts on the arm portions 44 due to a restoring force caused by springback of the terminal portions 28, the arm portions 44 are elastically deformed, and therefore damage to the arm portions 44 can be suppressed.

[0026] Furthermore, the retaining portion 38 is located within the range R of the axial dimension of the connecting portion 32. Therefore, for example, compared to when the retaining portion 38 is located outside the range R of the axial dimension of the connecting portion 32, it is possible to prevent the axial length of the stator 10 from becoming longer.

[0027] Next, a modification of this embodiment will be described.

[0028] 8 shows an enlarged view of a main portion of a stator component 12 according to a modification. In the first modification, the configuration of the holding portion 38 is modified as follows compared to the above embodiment. That is, a block-shaped block portion 48 is formed at the tip of the arm portion 44, and the block portion 48 has a groove 50 into which the terminal portion 28 is inserted.

[0029] With this configuration, the terminal portion 28 can be held by the groove 50, and therefore the holding force for the terminal portion 28 can be increased.

[0030] The above describes one embodiment of the technology of the present disclosure, but the technology of the present disclosure is not limited to the above, and it goes without saying that it can be implemented in various modifications within the scope of the gist of the technology.

[0031] Below, supplementary notes are provided regarding the technology of the present disclosure. (Appendix 1) It is composed of a plurality of stator components (12), Each of the stator components is a plurality of core constituent members (14) that form an annular yoke (20), each having a yoke constituent portion (22) divided in the circumferential direction of the yoke and a teeth portion (24) that protrudes from the yoke constituent portion toward the inside in the radial direction of the yoke; a winding (16) having a winding portion (26) wound around the tooth portion; an insulator (18) attached to the core component member and having a plurality of insulating portions (30) that insulate the teeth portion from the winding portion, and a connecting portion (32) that connects the plurality of insulating portions together; Equipped with The connecting portion of each of the stator components has a holding portion (38) that holds an end portion (28) of the winding provided in another of the stator components. Stator (10). (Appendix 2) the terminal portion is led out from the winding portion to one axial side of the stator component, the holding portion holds the terminal portion on one axial side of the stator constituent portion relative to the winding portion. 2. The stator of claim 1. (Appendix 3) The connecting portion has an extension portion (36) extending toward the insulating portion, The holding portion is an arm portion (44) extending from the extension portion; a bent portion (46) formed at the tip of the arm portion and bent toward the terminal portion with respect to the tip of the arm portion; and the arm portion supports the terminal portion in a direction in which the terminal portion springs back relative to the terminal portion, The bent portion supports the terminal portion from the radially outer side of the stator component. 3. The stator according to claim 1 or 2. (Appendix 4) the connecting portion has an extending portion extending toward the insulating portion, the holding portion has an arm portion extending from the extension portion, The tip of the arm has a groove (50) into which the terminal portion is inserted. 3. The stator according to claim 1 or 2. (Appendix 5) The arm portion has elasticity. 5. The stator according to claim 3 or 4. (Appendix 6) The holding portion is located within a range (R) of the axial dimension of the connecting portion. 6. The stator according to any one of claims 1 to 5. [Explanation of symbols]

[0032] 10... stator, 12... stator component, 14... core component, 16... winding, 18... insulator, 20... yoke, 22... yoke component, 24... teeth portion, 26... winding portion, 28... terminal portion, 30... insulating portion, 32... connecting portion, 34... annular portion, 36... extension portion, 38... holding portion, 40... radial extension portion, 42... axial extension portion, 44... arm portion, 46... bent portion, 48... block portion, 50... groove

Claims

1. It is composed of a plurality of stator components (12), Each of the stator components is a plurality of core constituent members (14) that form an annular yoke (20), each having a yoke constituent portion (22) divided in the circumferential direction of the yoke, and a teeth portion (24) that protrudes from the yoke constituent portion toward the radially inward direction of the yoke; a winding (16) having a winding portion (26) wound around the tooth portion; an insulator (18) attached to the core component member and having a plurality of insulating portions (30) that insulate the teeth portion from the winding portion, and a connecting portion (32) that connects the plurality of insulating portions together; Equipped with The connecting portion of each of the stator components has a holding portion (38) that holds an end portion (28) of the winding provided on another of the stator components. Stator (10).

2. the terminal portion is led out from the winding portion to one axial side of the stator component, the holding portion holds the terminal portion on one axial side of the stator constituent portion relative to the winding portion. The stator according to claim 1 .

3. The connecting portion has an extension portion (36) extending toward the insulating portion, The holding portion is an arm portion (44) extending from the extension portion; a bending portion (46) formed at the tip of the arm portion and bent toward the terminal portion with respect to the tip of the arm portion; and the arm portion supports the terminal portion in a direction in which the terminal portion springs back relative to the terminal portion, The bent portion supports the terminal portion from the radially outer side of the stator component. The stator according to claim 1 .

4. the connecting portion has an extending portion extending toward the insulating portion, the holding portion has an arm portion extending from the extension portion, The tip of the arm has a groove (50) into which the terminal portion is inserted. The stator according to claim 1 .

5. The arm portion has elasticity.

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

6. The holding portion is located within a range (R) of the axial dimension of the connecting portion. The stator according to claim 1 .

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