Stator

Abstract

To provide a stator that can ensure insulating properties to windings while preventing increase in the size of the stator.SOLUTION: A stator (10) comprises: a stator core (28) that has a plurality of teeth parts (26) extending radially; resin insulators (16) that are mounted on the stator core; and windings (18) that are wound around the plurality of teeth parts with the insulators therebetween. The insulator has a body part (34) that is mounted on the teeth part, a first extension part (38L) that extends to one side of the circumferential direction of the stator core from the body part, and is located between the winding and the leading end (26B) of the teeth part, and a second extension part (38R) that extends to the other side of the circumferential direction of the stator core from the body part, and is located between the winding and the leading end of the teeth part. The first extension part corresponding to one of the adjacent teeth parts and the second extension part corresponding to the other of the adjacent teeth parts have overlapping parts (46L, 46R) that overlap each other in the circumferential direction of the stator core.SELECTED DRAWING: Figure 2

Description

Technical Field

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

Background Art

[0002] In Patent Document 1, a stator core is composed of a tooth core having a plurality of teeth formed in the circumferential direction with a plurality of slots for winding coils, and a yoke core into which the tooth core is fitted. The tooth core is held by an insulator made of an insulator, and an insulating film processed into a shape along the teeth is interposed in the slot. A motor is disclosed in which a portion between the yoke core of the insulating film and the coil wound around the slot is insulated by overlapping two bent flaps formed at both ends of the insulating film. According to this motor, it is said that reliable insulation is achieved by overlapping the bent flaps at both ends of the insulating film when the tooth core is fitted into the yoke core.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the above-described conventional technology, when a high voltage is applied to the winding, there is a risk of dielectric breakdown in the insulating film. Here, it is conceivable to increase the thickness of the resin portion provided between the tooth portion of the insulator and the winding so as to withstand a high voltage. However, if this is done, the stator may be enlarged.

[0005] The technology of the present disclosure has been made in view of the above problems, and an object thereof is to provide a stator that can ensure insulation against windings while suppressing the enlargement of the stator.

Means for Solving the Problem

[0006] To solve the above problems, a stator (10) according to the technology of the present disclosure includes a stator core (28) having an annular portion (30) forming an annulus and a plurality of teeth portions (26) radially extending from the annular portion, a resin insulator (16) attached to the stator core, and windings (18) wound around the plurality of teeth portions via the insulator. The insulator has a main body portion (34) attached to the teeth portion, a first extension portion (38L) extending from the main body portion to one side in the circumferential direction of the stator core and located between the winding and the tip portion (26B) of the teeth portion, and a second extension portion (38R) extending from the main body portion to the other side in the circumferential direction of the stator core and located between the winding and the tip portion of the teeth portion. The first extension portion corresponding to one of the adjacent teeth portions among the plurality of teeth portions and the second extension portion corresponding to the other of the adjacent teeth portions among the plurality of teeth portions have overlapping portions (46L, 46R) that overlap in the circumferential direction of the stator core.

[0007] According to the stator of the technology of the present disclosure, while suppressing the increase in the size of the stator, insulation for the windings can be ensured.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Mode for Carrying Out the Invention

[0009] [First Embodiment] First, the first embodiment of the technology of the present disclosure will be described.

[0010] As shown in FIG. 1, the stator 10 according to the first embodiment includes a plurality of stator components 12. The stator 10 is configured by combining the plurality of stator components 12 in a ring shape. FIG. 1 shows half of the configuration of the stator 10. The stator 10 is applied to a brushless motor. The brushless motor may be used for any application. Examples of the brushless motor include a fan motor, a pump drive motor, and a compressor motor.

[0011] In each figure, the X direction indicates a direction perpendicular to the radial direction of the stator 10 as viewed from the axial 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. Also, in the following description, the circumferential direction of the stator 10 refers to the direction around the central axis of the stator 10. The circumferential direction of the stator core 28 described later is the same as the circumferential direction of the stator 10.

[0012] As shown in FIG. 2, each stator component 12 includes a core member 14, an insulator 16, and a winding 18. The core member 14 has a core back portion 24 and a tooth portion 26. The core back portion 24 extends in the circumferential direction of the stator core 28, and the tooth portion 26 extends from the central portion of the core back portion 24 toward the inner side in the Y direction. The shaft portion 26A of the tooth portion 26 is connected to the core back portion 24. The tip portion 26B of the tooth portion 26 is a free end and extends in an arc shape along the circumferential direction of the stator core 28 with respect to the shaft portion 26A.

[0013] By annularly combining a plurality of core members 14, the stator core 28 (see also FIG. 1) is formed. In a state where the stator core 28 is formed, a plurality of core back portions 24 form an annular portion 30 (see also FIG. 1), and a plurality of tooth portions 26 extend radially around the center of the stator core 28. Slots 32 are formed between the plurality of tooth portions 26.

[0014] The insulator 16 is attached to the core member 14. The insulator 16 is made of resin. Examples of the resin forming the insulator 16 include polyimide, polyamide, polyphenylene sulfide (PPS), and polybutylene terephthalate (PBT). Any resin may be used for the resin forming the insulator 16. The insulator 16 attached to each core member 14 has a configuration symmetric with respect to the X direction unless otherwise specified.

[0015] The winding 18 has a winding winding portion 20 wound around the tooth portion 26 via an insulator 16 and a winding terminal portion 22 continuous with the winding winding portion 20. The winding winding portion 20 is formed by winding the winding 18 around the tooth portion 26 in the Y direction. The winding 18 may have only one winding winding portion 20 or may have several winding winding portions 2018.

[0016] As shown in FIGS. 2 to 4, the insulator 16 has a main body portion 34, a pair of first insulating portions 36, a pair of second insulating portions 38, and a third insulating portion 40. The main body portion 34 is attached to the shaft portion 26A of the tooth portion 26. One of the pair of first insulating portions 36 extends from the main body portion 34 to one side in the circumferential direction of the stator core 28, and the other of the pair of first insulating portions 36 extends from the main body portion 34 to the other side in the circumferential direction of the stator core 28. Each first insulating portion 36 is located between the winding winding portion 20 and the core back portion 24. The first insulating portion 36 is an example of a "partition portion" according to the technology of the present disclosure. The extending end portion 36A of each first insulating portion 36 is located outside (i.e., on the side opposite to the main body portion 34) of the outer diameter portion 20A of the winding winding portion 20 when viewed from the Z direction. That is, the extending end portion 36A of each first insulating portion 36 protrudes in the X direction from the outer diameter portion 20A of the winding winding portion 20 when viewed from the Z direction.

[0017] One of the pair of second insulating portions 38 extends from the main body portion 34 to one side in the circumferential direction of the stator core 28, and the other of the pair of second insulating portions 38 extends from the main body portion 34 to the other side in the circumferential direction of the stator core 28. Each second insulating portion 38 is located between the winding terminal portion 22 and the tip portion 26B of the tooth portion 26. The pair of second insulating portions 38 are examples of an "extending portion", a "first extending portion", and a "second extending portion" according to the technology of the present disclosure. The third insulating portion 40 extends from the main body portion 34 to the outside in the Y direction and covers the central portion of the core back portion 24 from the Z direction.

[0018] As shown in FIG. 3, a groove 42 (in other words, a gap) is provided between the first insulating portion 36 and the core back portion 24. Specifically, the first insulating portion 36 has a facing surface 36B facing the core back portion 24, and the core back portion 24 has a facing surface 24A facing the first insulating portion 36. The facing surface 24A and the facing surface 36B extend in the X direction and the Z direction, and face each other with a gap in the Y direction. The gap between the facing surface 24A and the facing surface 36B is formed as the groove 42. In this way, by providing the groove 42 between the first insulating portion 36 and the core back portion 24, the creepage distance L1 between the winding winding portion 20 and the core back portion 24 can be ensured.

[0019] In this specification, the creepage distance refers to the shortest distance along the surface of the insulator 16 from the winding 18 to the stator core 28. In the standard IEC60664-1 defined by the International Electrotechnical Commission (IEC), it is stipulated that for grooves with a width less than a pre-specified width, the creepage distance due to the grooves is not considered. However, the width W of the groove 42 is set to be equal to or greater than the pre-specified width when considering the creepage distance due to the grooves in the standard IEC60664-1.

[0020] As shown in FIG. 4, each second insulating portion 38 has a holding portion 44 for holding the winding terminal portion 22. Specifically, the holding portion 44 is formed in a concave shape, and the winding terminal portion 22 is inserted inside the concave holding portion 44, so that the winding terminal portion 22 is held by the holding portion 44.

[0021] Further, one of the pair of second insulating portions 38 (hereinafter referred to as "second insulating portion 38L") has an extension portion 46L extending to one side in the circumferential direction of the stator core 28, and the other of the pair of second insulating portions 38 (hereinafter referred to as "second insulating portion 38R") has an extension portion 46R extending to the other side in the circumferential direction of the stator core 28.

[0022] Of the plurality of tooth portions 26, the extension portion 46L corresponding to one of the adjacent tooth portions 26 is located inside in the Y direction with respect to the extension portion 46R corresponding to the other of the adjacent tooth portions 26 among the plurality of tooth portions 26. The extension portion 46L may be located outside in the Y direction with respect to the extension portion 46R. The extension portion 46L and the extension portion 46R overlap in the circumferential direction of the stator core 28. The extension portion 46L and the extension portion 46R are an example of an "overlap portion" according to the technology of the present disclosure. In this way, by overlapping the extension portion 46L and the extension portion 46R in the circumferential direction of the stator core 28, the creepage distance L2 between the winding terminal portion 22 and the tip portion 26B of the tooth portion 26 can be ensured.

[0023] Next, the operation and effects of the first embodiment of the technology of the present disclosure will be described.

[0024] As described in detail above, in the first embodiment, the groove 42 is provided between the first insulating portion 36 and the core back portion 24. Therefore, the groove 42 can ensure the creepage distance L1 between the winding winding portion 20 and the core back portion 24, so that the insulation property for the winding 18 can be ensured.

[0025] Further, by ensuring the creepage distance L1 to ensure the insulation property for the winding 18, the thickness of the first insulating portion 36 can be made thinner than the case where the space between the winding winding portion 20 and the core back portion 24 is insulated only by the first insulating portion 36. As a result, the cross-sectional area of the slot 32 can be enlarged, and thus the number of turns of the winding winding portion 20 can be increased, so that the increase in size of the stator 10 can be suppressed. That is, it is possible to suppress the increase in size of the stator 10 in order to enlarge the cross-sectional area of the slot 32.

[0026] Further, in the first embodiment, the second insulating portion 38L has an extension portion 46L that extends to one side in the circumferential direction of the stator core 28, and the second insulating portion 38R has an extension portion 46R that extends to the other side in the circumferential direction of the stator core 28. The extension portion 46L and the extension portion 46R overlap in the circumferential direction of the stator core 28. Therefore, since the extension portion 46L and the extension portion 46R overlap in the circumferential direction of the stator core 28, the creepage distance L2 between the winding terminal portion 22 and the tip portion 26B of the tooth portion 26 can be ensured, so that the insulation property for the winding 18 can be ensured.

[0027] Also, by ensuring the creepage distance L2 to ensure the insulation property for the winding 18, the thickness of the second insulating portion 38 can be made thinner as compared with the case where the insulation between the tip portion 26B of the tooth portion 26 and the winding 18 is provided only by the second insulating portion 38. Thereby, the cross-sectional area of the slot 32 can be enlarged, and thus the number of turns of the winding winding portion 20 can be increased, so that the increase in size of the stator 10 can be suppressed. That is, it is possible to suppress an increase in the size of the stator 10 in order to enlarge the cross-sectional area of the slot 32.

[0028] In the first embodiment, the opposing surface 24A of the core back portion 24 extends in the X direction. However, as shown in FIG. 5, the opposing surface 24A of the core back may be formed so as to face the first insulating portion 36 side as it moves away from the tooth portion 26 along the circumferential direction of the stator core 28. In the example shown in FIG. 5, the opposing surface 24A is formed by a curved surface along the circumferential direction of the stator core 28. However, the opposing surface 24A may be formed by an inclined surface (that is, an inclined plane) that inclines toward the first insulating portion 36 side as it moves away from the tooth portion 26 along the circumferential direction of the stator core 28.

[0029] With such a configuration, since the groove width is enlarged on the tooth portion 26 side of the groove 42, the creepage distance L1 between the winding winding portion 20 and the core back portion 24 can be increased as compared with the first embodiment. Thereby, the insulation property for the winding 18 can be improved.

[0030] Also, in the first embodiment, the extending end portion 36A of each first insulating portion 36 protrudes in the X direction from the outer diameter portion 20A of the winding winding portion 20 when viewed from the Z direction. However, as shown in FIG. 6, the extending end portion 36A of each first insulating portion 36 may be located closer to the main body portion 34 than the outer diameter portion 20A of the winding winding portion 20 when viewed from the Z direction.

[0031] With such a configuration, while ensuring the insulation property with respect to the winding 18 by securing the creepage distance L1, the first insulating portion 36, and thus the insulator 16, can be miniaturized.

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

[0033] In the second embodiment, the configuration of the stator 10 is changed as follows with respect to the first embodiment. That is, as shown in FIG. 7, one of the pair of first insulating portions 36 (hereinafter referred to as "first insulating portion 36L") has an extension portion 48L that extends to one side in the circumferential direction of the stator core 28, and the other of the pair of first insulating portions 36 (hereinafter referred to as "first insulating portion 36R") has an extension portion 48R that extends to the other side in the circumferential direction of the stator core 28. The extension portion 48L is located outside the extension portion 48R in the Y direction. The extension portion 48L may be located inside the extension portion 48R in the Y direction. The extension portion 48L and the extension portion 48R overlap in the circumferential direction of the stator core 28. The pair of first insulating portions 36 is an example of the "first partition portion" and the "second partition portion" according to the technology of the present disclosure. The extension portion 48L and the extension portion 48R are examples of the "overlap portion" according to the technology of the present disclosure.

[0034] With such a configuration, compared with the first embodiment, the creepage distance L1 between the winding winding portion 20 and the core back portion 24 can be increased. Thereby, the insulation property with respect to the winding 18 can be improved.

[0035] Note that the extension part 46L and the extension part 46R are respectively formed on the first insulating part 36L and the first insulating part 36R so as to be foldable, and after a plurality of core members 14 are annularly combined, they may be overlapped in the circumferential direction of the stator core 28 by being folded.

[0036] [Third Embodiment] Next, a third embodiment of the technology of the present disclosure will be described.

[0037] In the third embodiment, the configuration of the stator 10 is changed as follows compared with the first embodiment. That is, as shown in FIG. 8, an insulating part 50 is provided at the extending end part 36A of each first insulating part 36. The insulating part 50 has a protruding part 50A that protrudes inward in the Y direction with respect to the extending end part 36A of the first insulating part 36. The insulating part 50 is formed in a block shape made of resin as an example.

[0038] With such a configuration, compared with the first embodiment, the creepage distance L1 between the winding winding part 20 and the core back part 24 can be increased. Thereby, the insulation property with respect to the winding 18 can be improved.

[0039] [Fourth Embodiment] Next, a fourth embodiment of the technology of the present disclosure will be described.

[0040] In the fourth embodiment, the configuration of the stator 10 is changed as follows compared with the first embodiment. That is, in the first embodiment, the opposing surface 24A of the core back part 24 extends in a planar shape in the X direction as a whole when viewed from the Z direction. However, as shown in FIG. 9, in the fourth embodiment, the surface 24A1 of the opposing surface 24A corresponding to the extending end part 36A of the first insulating part 36 is formed by an inclined surface that faces away from the first insulating part 36 as it moves away from the tooth part 26 along the circumferential direction of the stator core 28.

[0041] With such a configuration, the creepage distance L3 between the winding winding portion 20 and the opposing surface 24A can be increased as compared to the case where the opposing surface 24A extends in a planar shape in the X direction as a whole. Thereby, the insulation property with respect to the winding 18 can be improved.

[0042] In addition, in the example shown in FIG. 9, the surface 24A1 is formed by an inclined surface (that is, an inclined plane) that inclines toward the side opposite to the first insulating portion 36 as it moves away from the tooth portion 26 along the circumferential direction of the stator core 28. However, it may be formed by a curved surface that faces the side opposite to the first insulating portion 36 as it moves away from the tooth portion 26 along the circumferential direction of the stator core 28.

[0043] Further, as shown in FIG. 9, when forming the surface 24A1 on the opposing surface 24A, as shown in FIG. 10, in order to compensate for the volume of the core back portion 24 due to the formation of the surface 24A1, the step portion 52 formed at the outer peripheral corner portion of the core back portion 24 may be omitted. Further, when the step portion 52 is omitted, a concave portion 54 may be formed on the outer peripheral surface of the core back portion 24 in order to reduce the load when fitting the stator core 28 to an outer peripheral ring (not shown).

[0044] [Fifth Embodiment] Next, a fifth embodiment of the technology of the present disclosure will be described.

[0045] In the fifth embodiment, as compared with the first embodiment, the configuration of the stator 10 is changed as follows. That is, as shown in FIG. 11, in the fifth embodiment, the insulator 16 has a bent portion 56 that extends from the extending end portion 36A of the first insulating portion 36 toward the tip end portion 26B side of the tooth portion 26. The bent portion 56 is integrally formed with the extending end portion 36A of the first insulating portion 36 and is bent with respect to the extending end portion 36A of the first insulating portion 36. As an example, the tip end portion of the bent portion 56 reaches the extending end portion 38A of the second insulating portion 38.

[0046] With such a configuration, it is possible to secure the creepage distance L4 between the winding winding portion 20 and the tip portion 26B of the tooth portion 26. Thereby, insulation with respect to the winding 18 can be ensured.

[0047] Note that, as shown in FIG. 12, the tip of the bent portion 56 may not reach the extended end portion 38A of the second insulating portion 38. With such a configuration, compared with the first embodiment, the creepage distance L1 between the winding winding portion 20 and the core back portion 24 can be increased. Thereby, the insulation with respect to the winding 18 can be improved.

[0048] [Sixth Embodiment] Next, a sixth embodiment of the technology of the present disclosure will be described.

[0049] In the sixth embodiment, the configuration of the stator 10 is changed as follows with respect to the first embodiment. That is, as shown in FIGS. 13 and 14, the second insulating portion 38L is formed with a slit 58A that opens to the extended end portion 38A of the second insulating portion 38L, and the second insulating portion 38R is formed with a slit 58B that opens to the extended end portion 38A of the second insulating portion 38R. The slit 58A and the slit 58B are examples of the "slit", "first slit", and "second slit" according to the technology of the present disclosure. The widths of the slit 58A and the slit 58B are set to be equal to or greater than a width defined in advance in consideration of the creepage distance due to the groove in the standard IEC60664-1.

[0050] With such a configuration, compared with the first embodiment, the creepage distance L2 between the winding terminal portion 22 and the tip portion 26B of the tooth portion 26 can be increased. Thereby, the insulation with respect to the winding 18 can be improved.

[0051] Note that, as shown in FIG. 14, an insulator 60 may be inserted into the slit 58A corresponding to one of the adjacent tooth portions 26 among the plurality of tooth portions 26 and the second slit 58B corresponding to the other of the adjacent tooth portions 26 among the plurality of tooth portions 26. The insulator 60 may be a resin block-shaped member or insulating paper. With this configuration, compared with the example shown in FIG. 13, the insulation property with respect to the winding 18 can be improved.

[0052] [Seventh Embodiment] Next, a seventh embodiment of the technology of the present disclosure will be described.

[0053] In the seventh embodiment, the configuration of the stator 10 is changed as follows with respect to the first embodiment. That is, as shown in FIG. 15, in the seventh embodiment, the insulator 16 has a bent portion 62 extending from the extending end portion 38A of the second insulating portion 38 toward the core back portion 24 side. The bent portion 62 is integrally formed with the extending end portion 38A of the second insulating portion 38 and is bent with respect to the extending end portion 38A of the second insulating portion. As an example, the tip of the bent portion 62 reaches the extending end portion 36A of the first insulating portion 36. The bent portions 62 provided on each of the second insulating portions 38 are examples of the "first bent portion" and the "second bent portion" according to the technology of the present invention.

[0054] With this configuration, the creepage distance L5 between the winding terminal portion 22 and the core back portion 24 can be ensured. Thereby, the insulation property with respect to the winding 18 can be ensured.

[0055] Note that, as shown in FIG. 16, the tip of the bent portion 62 does not have to reach the extending end portion 36A of the first insulating portion 36. Even with this configuration, the creepage distance L2 between the winding terminal portion 22 and the tip portion 26B of the tooth portion 26 can be ensured. Thereby, the insulation property with respect to the winding 18 can be ensured.

[0056] [Eighth Embodiment] Next, an eighth embodiment of the technology of the present disclosure will be described.

[0057] In the eighth embodiment, the configuration of the stator 10 is changed as follows with respect to the first embodiment. That is, in the eighth embodiment, the insulator 16 has a pair of insulator portions 66 divided in the Z direction by a dividing portion 64. The pair of insulator portions 66 are symmetrically configured in the Z direction. Each insulator portion 66 has a side surface 66A facing the shaft portion 26A of the teeth portion 26 in the X direction. A stepped portion 68 having a step in the X direction is formed on the surface of the side surface 66A on the side of the dividing portion 64.

[0058] With such a configuration, the creepage distance L6 between the winding winding portion 20 and the shaft portion 26A of the teeth portion 26 can be ensured. Thereby, insulation with respect to the winding 18 can be ensured.

[0059] In each of the above embodiments, the stator core 28 is divided into a plurality of core members 14, but a configuration in which the plurality of core members 14 are integrated may also be used. Further, the insulators 16 attached to the respective core members 14 may also be integrated.

[0060] Moreover, among the configurations described in each of the above embodiments, configurations that can be combined may be appropriately combined.

[0061] Although one embodiment of the technology of the present disclosure has been described above, the present invention is not limited to the above, and it goes without saying that various modifications can be made within the scope not departing from the gist thereof.

[0062] Hereinafter, an appendix regarding the technology of the present disclosure is shown. (Appendix 1) A stator core (28) having an annular portion (30) forming an annulus and a plurality of teeth portions (26) radially extending from the annular portion, A resin insulator (16) attached to the stator core, A winding (18) wound around the plurality of teeth portions via the insulator, Comprising, The insulator is a main body portion (34) attached to the tooth portion; a first extending portion (38L) extending from the main body portion to one side in the circumferential direction of the stator core and positioned between the winding and the tip portion (26B) of the tooth portion; a second extending portion (38R) extending from the main body portion to the other side in the circumferential direction of the stator core and positioned between the winding and the tip portion of the tooth portion; and having the first extending portion corresponding to one of the adjacent tooth portions among the plurality of tooth portions and the second extending portion corresponding to the other of the adjacent tooth portions among the plurality of tooth portions have overlapping portions (46L, 46R) that overlap in the circumferential direction of the stator core; a stator (10). (Appendix 2) A first slit (58L) that opens at the extending end of the first extending portion is formed in the first extending portion; A second slit (58R) that opens at the extending end of the second extending portion is formed in the second extending portion. The stator according to Appendix 1. (Appendix 3) An insulator (60) is inserted into the first slit corresponding to one of the adjacent tooth portions among the plurality of tooth portions and the second slit corresponding to the other of the adjacent tooth portions among the plurality of tooth portions. The stator according to Appendix 2. (Appendix 4) The insulator has a first bent portion (62) extending from the extending end of the first extending portion toward the annular portion side; and a second bent portion (62) extending from the extending end of the second extending portion toward the annular portion side. and having The stator according to any one of Appendix 1 to Appendix 3. (Appendix 5) The insulator has a partition portion (36) extending from the main body portion in the circumferential direction of the stator core and positioned between the winding and the annular portion. A groove (42) is provided between the partition wall portion and the annular portion. The stator according to any one of Appendices 1 to 4. (Appendix 6) The annular portion has a facing surface (24A) facing the partition wall portion. The facing surface is formed by an inclined surface or a curved surface that faces the partition wall portion as it moves away from the tooth portion along the circumferential direction of the stator core. The stator according to Appendix 5. (Appendix 7) The extending end portion (36A) of the partition wall portion is located closer to the main body portion side than the outer diameter portion (20A) of the winding when viewed from the axial direction of the stator core. The stator according to Appendix 5 or Appendix 6. (Appendix 8) The insulator A first partition wall portion (36L) as the partition wall portion extending from the main body portion to one side in the circumferential direction of the stator core, A second partition wall portion (36R) as the partition wall portion extending from the main body portion to the other side in the circumferential direction of the stator core, and has The first partition wall portion corresponding to one of the adjacent tooth portions among the plurality of tooth portions and the second partition wall portion corresponding to the other of the adjacent tooth portions among the plurality of tooth portions have overlapping portions (48L, 48R) that overlap in the circumferential direction of the stator core. The stator according to any one of Appendices 5 to 7. (Appendix 9) An insulating portion (50) is provided at the extending end portion of the partition wall portion, The insulating portion has a protruding portion (50A) that protrudes radially inward of the stator core with respect to the extending end portion of the partition wall portion. The stator according to any one of Appendices 5 to 8. (Appendix 10) The annular portion has a facing surface facing the partition wall portion. Of the opposing surfaces, the surface (24A1) corresponding to the extending end portion of the partition wall portion is formed by an inclined surface or a curved surface that faces away from the partition wall portion as it moves away from the tooth portion along the circumferential direction of the stator core. The stator according to any one of Appendices 5 to 9. (Appendix 11) The insulator has a bent portion (56) that extends from the extending end portion of the partition wall portion toward the tip end portion side of the tooth portion. The stator according to any one of Appendices 5 to 10. (Appendix 12) The insulator has a pair of insulator portions (66) divided by a dividing portion (64). Each of the insulator portions has a side surface (66A) facing the tooth portion. On the surface on the dividing portion side of the side surface, a stepped portion (68) having a step is formed. The stator according to any one of Appendices 1 to 11.

Explanation of Reference Numerals

[0063] 10…Stator, 12…Stator component, 14…Core member, 16…Insulator, 18…Winding, 20…Winding winding portion, 20A…Outer diameter portion, 22…Winding terminal portion, 24…Core back portion, 24A…Opposing surface, 24A1…Surface, 26…Tooth portion, 26A…Shaft portion, 26B…Tip end portion, 28…Stator core, 30…Annular portion, 32…Slot, 34…Main body portion, 36…First insulating portion, 36A…Extending end portion, 36B…Opposing surface, 38…Second insulating portion, 38A…Extending end portion, 40…Third insulating portion, 42…Groove, 44…Holding portion, 46L…Extension portion, 46R…Extension portion, 48L…Extension portion, 48R…Extension portion, 50…Insulating portion, 50A…Protruding portion, 52…Step portion, 54…Recessed portion, 56…Bent portion, 58A…Slit, 58B…Slit, 60…Insulator body, 62…Bent portion, 64…Dividing portion, 66…Insulator portion, 66A…Side surface, 68…Stepped portion

Claims

1. A stator core (28) having an annular portion (30) forming an annulus and a plurality of teeth portions (26) radially extending from the annular portion, a resin insulator (16) attached to the stator core, windings (18) wound around the plurality of teeth portions via the insulator, comprising: The insulator has a main body portion (34) attached to the teeth portion, a first extension portion (38L) extending from the main body portion to one side in the circumferential direction of the stator core and positioned between the winding and the tip portion (26B) of the teeth portion, a second extension portion (38R) extending from the main body portion to the other side in the circumferential direction of the stator core and positioned between the winding and the tip portion of the teeth portion, and having: The first extension portion corresponding to one of the adjacent teeth portions among the plurality of teeth portions and the second extension portion corresponding to the other of the adjacent teeth portions among the plurality of teeth portions have overlapping portions (46L, 46R) that overlap in the circumferential direction of the stator core. A stator (10).

2. A first slit (58L) opening at the extending end of the first extension portion is formed in the first extension portion, and a second slit (58R) opening at the extending end of the second extension portion is formed in the second extension portion. The stator according to claim 1.

3. An insulator (60) is inserted into the first slit corresponding to one of the adjacent teeth portions among the plurality of teeth portions and the second slit corresponding to the other of the adjacent teeth portions among the plurality of teeth portions. The stator according to claim 2.

4. The insulator has a first bent portion (62) extending from the extending end of the first extension portion toward the annular portion side, and a second bent portion (62) extending from the extending end of the second extension portion toward the annular portion side. and having: The stator according to claim 1.

5. The insulator has a partition portion (36) extending from the main body portion in the circumferential direction of the stator core and positioned between the winding and the annular portion, and a groove (42) is provided between the partition portion and the annular portion. The stator (10) according to claim 1.

6. The annular portion has a facing surface (24A) facing the partition portion, and the facing surface is formed by an inclined surface or a curved surface that faces the partition portion side as it moves away from the teeth portion along the circumferential direction of the stator core. The stator according to claim 5.

7. The extending end portion (36A) of the partition wall portion is located closer to the main body portion side than the outer diameter portion (20A) of the winding when viewed from the axial direction of the stator core. The stator according to claim 5.

8. The insulator is a first partition wall portion (36L) as the partition wall portion extending from the main body portion to one side in the circumferential direction of the stator core, a second partition wall portion (36R) as the partition wall portion extending from the main body portion to the other side in the circumferential direction of the stator core, and has the first partition wall portion corresponding to one of the adjacent tooth portions among the plurality of tooth portions and the second partition wall portion corresponding to the other of the adjacent tooth portions among the plurality of tooth portions have overlapping portions (48L, 48R) that overlap in the circumferential direction of the stator core. The stator according to claim 5.

9. An insulating portion (50) is provided at the extending end portion of the partition wall portion. The insulating portion has a protruding portion (50A) that protrudes radially inward of the stator core with respect to the extending end portion of the partition wall portion. The stator according to claim 5.

10. The annular portion has a facing surface facing the partition wall portion. Among the facing surfaces, the surface (24A1) corresponding to the extending end portion of the partition wall portion is formed by an inclined surface or a curved surface that faces away from the partition wall portion as it moves away from the tooth portion along the circumferential direction of the stator core. The stator according to claim 5.

11. The insulator has a bent portion (56) extending from the extending end portion of the partition wall portion toward the tip end portion side of the tooth portion. The stator according to claim 5.

12. The insulator has a pair of insulator portions (66) divided by a dividing portion (64). Each of the insulator portions has a side surface (66A) facing the tooth portion. A stepped portion (68) having a step is formed on the surface on the dividing portion side of the side surface. The stator according to claim 1.

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