Insulator, stator, and rotating electric machine using them

Abstract

To provide an insulator, a stator, and a rotary electric machine capable of properly fixing a coil conductor by a simple method.SOLUTION: The stator includes multiple winding blocks arranged in a circular ring, multiple split cores that constitute a part of the multiple winding blocks and constitute a circular-ring-shaped stator core by being mutually combined, an insulator that constitutes a part of the multiple winding blocks and is mounted to each of the multiple split cores, a winding part that constitutes a part of the multiple winding blocks and is wound around each of the multiple split cores via the insulator, a coil conductor that has a crossing part drawn from the winding part, and a regulating member that regulates a movement of the coil conductor. Multiple insulators have an accommodation part that accommodates the crossing part. The accommodation part has one or multiple grooves that extend along the circumferential direction of the stator core and are formed by depressing the grooves in the axial direction of the stator core. The regulating member is mounted to the accommodation part in a state that each opening part of the one or multiple grooves is at least partially covered.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present embodiment of the present invention relates to an insulator, a stator, and a rotating electric machine using them. [Background technology]

[0002] Some rotating electric machines include a stator and a rotor. The stator includes, for example, a circular stator core, a plurality of teeth protruding radially inward from the inner peripheral surface of the stator core, coil wires wound around the teeth, and insulators attached to the teeth to ensure insulation between the teeth and the coil wires.

[0003] The rotor includes, for example, a substantially cylindrical rotor core rotatably arranged radially inside the stator, and magnets attached to the rotor core. When current is supplied to the coil conductor, magnetic flux linkage is generated in each tooth. This magnetic flux linkage generates magnetic attractive and repulsive forces between the rotor magnets and the rotor, causing the rotor to rotate.

[0004] Another known rotating electric machine of this type is one in which the stator core is constructed from multiple split cores to facilitate winding of the coil conductors and increase the space factor. The split cores used in this rotating electric machine have a roughly arc-shaped back yoke portion that, when combined with each other, forms the annular portion of the stator core, and teeth that protrude radially inward from the back yoke portion. Multiple winding blocks each having split cores are arranged in an annular ring member to form the stator.

[0005] Each split core is fitted with an insulator made of an insulating material. The insulator has tooth cover portions attached to the teeth and around which coil conductors are wound, and transition portion accommodating portions that accommodate the coil conductors drawn from the tooth cover portions and the coil conductors drawn from the other split cores and guide them to terminal connection portions. The transition portion accommodating portion is integrally formed in a generally arc-shaped manner on the outer side of the tooth cover portion in the core radial direction. The transition portion accommodating portion has guide grooves that guide the transition portions of the coil conductors drawn from the tooth cover portions and the transition portions of the coil conductors drawn from the other split cores along the circumferential direction of the stator core. The guide grooves are formed in multiple stages spaced apart from each other in the core radial direction for each of multiple phases, such as U-phase, V-phase, and W-phase. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 566976 Summary of the Invention [Problem to be solved by the invention]

[0007] In the conventional rotating electric machine described above, the crossover portions of the coil conductors drawn from the tooth covers to the outer side in the core radial direction are simply bent to fit into the corresponding guide grooves of the crossover portion housings. Therefore, when assembling the stator and assembling the multiple split coils while routing the crossover portions of each coil, the crossover portions of the coil conductors drawn from the tooth covers to the outer side in the core radial direction, or the crossover portions of the coil conductors drawn from other split cores, may fall out of the guide grooves. In this case, the coil conductors may be displaced from their predetermined positions, potentially causing a short circuit or other problems.

[0008] Therefore, an insulator, a stator, and a rotating electric machine are provided that can properly fix coil conductors in a simple manner. [Means for solving the problem]

[0009] The stator of this embodiment includes a plurality of winding blocks arranged in an annular shape, a plurality of divided cores that form part of the winding blocks and are combined with each other to form a circular stator core, insulators that form part of the winding blocks and are attached to each of the divided cores, a coil conductor that forms part of the winding blocks and has a winding portion that is wound around each of the divided cores via the insulator and a jumper portion that is drawn out from the winding portion, and a restricting member that restricts movement of the coil conductor. The plurality of insulators have housing portions that accommodate the jumper portions, and the housing portion has one or more grooves that extend circumferentially around the stator core and are recessed in the axial direction of the stator core. The restricting member is attached to the housing portion while at least partially covering each opening of the one or more grooves.

[0010] The insulator of this embodiment is mounted on an annular stator core. The insulator includes a housing portion that houses a bridge portion of a coil conductor. The housing portion has a plurality of grooves recessed in the axial direction of the stator core along the circumferential direction of the stator core, a wall portion formed radially inward of the stator core relative to the plurality of grooves, a wall portion formed radially outward of the stator core, and locking portions formed on the wall portions that receive and fix claws of a restricting member mounted on the housing portion while at least partially covering the openings of each of the plurality of grooves.

[0011] The rotating electric machine of this embodiment includes a stator having the above-described stator or the above-described insulator, and a rotor. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic view of an example of a rotating electric machine according to a first embodiment, viewed from one axial side with a stator case removed; [Figure 2] FIG. 2 is a schematic diagram illustrating an example of the rotating electric machine according to the first embodiment shown in FIG. 1 in a state where a restricting member is removed; [Figure 3]FIG. 1 is a perspective view of a winding block of an example of a rotating electric machine according to a first embodiment, viewed from the radially inner side; [Figure 4] FIG. 1 is a perspective view of a second insulator of an example of a rotating electric machine according to a first embodiment, viewed from the radially inner side; [Figure 5] FIG. 1 is a perspective view of a second insulator of an example of a rotating electric machine according to a first embodiment, viewed from the radially outer side; [Figure 6] FIG. 1 is a view of a second insulator of an example of the rotating electric machine according to the first embodiment, viewed from one side in the axial direction; [Figure 7] FIG. 1 is a view of a second insulator of an example of the rotating electric machine according to the first embodiment, viewed from the radially inner side; [Figure 8] FIG. 1 is a view of a second insulator of an example of the rotating electric machine according to the first embodiment, viewed from the radially outer side; [Figure 9] 9 is a cross-sectional view of the second insulator of the rotating electric machine according to the first embodiment taken along line X9-X9 in FIG. 8. [Figure 10] FIG. 1 is a perspective view of an example of a restricting member of a rotating electric machine according to a first embodiment; [Figure 11] FIG. 1 is a view of an example of a restricting member of a rotating electric machine according to a first embodiment, viewed from the axially inner side; [Figure 12] FIG. 1 is a view of an example of a restricting member of a rotating electric machine according to a first embodiment, viewed from the axial outside. [Figure 13] FIG. 1 is a view of an example of a restricting member of a rotating electric machine according to a first embodiment, viewed from one side in the circumferential direction; [Figure 14] FIG. 10 is a perspective view of a second insulator of an example of the rotating electric machine according to the first embodiment, viewed from the radially inner side in a state in which a restricting member is attached; [Figure 15] FIG. 1 is an enlarged perspective view of the periphery of an accommodating portion when viewed from the radially outer side in a state where a restricting member is attached to a second insulator of an example of a rotating electric machine according to a first embodiment; [Figure 16] FIG. 1 is a view of a second insulator of an example of the rotating electric machine according to the first embodiment, viewed from one axial side in a state in which a restricting member is attached; [Figure 17] 17 is a cross-sectional view showing the second insulator of the example of the rotating electric machine according to the first embodiment, taken along line X17-X17 in FIG. 16 in a state in which a restricting member is attached; [Figure 18] FIG. 17 is an enlarged view of the periphery of the storage section of FIG. 16. [Figure 19] 1 is a flowchart illustrating a method for manufacturing a stator of an example of a rotating electric machine according to a first embodiment. [Figure 20] FIG. 10 is a schematic view of an example of a rotating electric machine according to a second embodiment, viewed from one axial side with a stator case removed; DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, several embodiments will be described with reference to the drawings. Note that the same components in each embodiment will be denoted by the same reference numerals and the description thereof will be omitted.

[0014] (First embodiment) First, a first embodiment will be described with reference to FIGS. 1 to 19. As shown in FIG. 1, a rotating electric machine 100 includes a stator 10, a rotor 11, and a stator case (not shown). FIG. 1 is a view of the rotating electric machine 100 viewed from one axial side in a fixed state with the case removed. In the following description, the direction parallel to the rotation axis Ax of the rotor 11, which is orthogonal to the plane of FIG. 1, is referred to as the axial direction, the rotation direction of the rotor 11 is referred to as the circumferential direction, and the radial direction of the rotor 11, which is orthogonal to the axial direction and the rotation direction, is referred to as the radial direction. In the drawings, the axial direction is referred to as A, the circumferential direction is referred to as C, and the radial direction is referred to as R. Note that the core axial direction, which is the axial direction of a stator core 14 (described later), coincides with the direction in which the rotation axis Ax of the rotor 11 extends. The core circumferential direction, which is the circumferential direction of the stator core 14, coincides with the rotation direction of the rotor 11, i.e., the circumferential direction. The core radial direction, which is the radial direction of the stator core 14, coincides with the radial direction of the rotor 11.

[0015] The stator 10 is formed in a substantially cylindrical shape and is fitted and fixed to the inner peripheral surface of the stator case. The rotor 11 is disposed radially inside the stator 10 and is provided so as to be rotatable relative to the stator 10. The stator case (not shown) is formed in a substantially cylindrical shape and houses the stator 10 therein. The axial direction of the stator 10 and the stator case coincides with the rotation axis Ax.

[0016] The rotor 11 has a shaft 12, a rotor core 13, and magnets (not shown). The shaft 12 is formed in a cylindrical shape and rotates around a rotation axis Ax. The rotor core 13 is fixed to the shaft 12, and has a through-hole 131 formed in the radial center that passes through the rotor core 13 in the axial direction. The shaft 12 is fixed in the through-hole 131 by, for example, press-fitting. A plurality of magnets (not shown) are attached near the outer periphery of the rotor core 13, lined up in the circumferential direction.

[0017] The stator 10 has a stator core 14, a ring member 15, an insulator 30, a coil conductor 60, and a restricting member 70. The stator core 14 is made of a magnetic material and is cylindrical as a whole, and is configured to be divisible into multiple pieces. The stator core 14 is configured to include multiple, in this case 24, split cores 16. The multiple split cores 16 are press-fitted into an annular ring member 15 and combined with each other to form a single cylindrical stator core 14 as a whole. The axial direction of the ring member 15 coincides with the rotation axis Ax.

[0018] The insulator 30 is made of an insulating material and is attached to the stator core 14. In this case, the insulator 30 covers at least a portion of each of the split cores 16. The coil conductor 60 is wound around the stator core 14. In this embodiment, the coil conductor 60 is wound around the stator core 14 using a concentrated winding method. The coil conductor 60 is also wound around each of the split cores 16 from above the insulator 30.

[0019] The restricting member 70 covers a later-described transition portion 63 of the coil conductor 60, which is shown by a dashed line in Figures 1 and 2, thereby restricting the transition portion 63 from moving outward in the axial direction of the insulator 30. This allows the restricting member 70 to function as a suppressor for the transition portion 63 from falling off. Figure 1 shows the rotating electric machine 100 with the restricting member 70 attached. Figure 2 shows the rotating electric machine 100 with the restricting member 70 removed. The restricting member 70 is made of an insulating material.

[0020] The coil conductor 60 has a winding portion 61 wound around the split core 16, and crossover portions 62, 63 drawn out from both sides of the winding portion 61. The first crossover portion 62 is a portion drawn out from the winding start side of the coil conductor 60. The second crossover portion 63 is a portion drawn out from the winding end side of the coil conductor 60. In this embodiment, the coil conductor 60 is a so-called rectangular wire with a rectangular cross section, but is not limited to this. In other embodiments, the coil conductor 60 may be a so-called round wire with a circular cross section.

[0021] The split cores 16 are configured by laminating multiple metal plates, for example. The split cores 16 may also be formed by pressure molding soft magnetic powder such as silicon steel plate. In this embodiment, of the 24 split cores 16, eight split cores 16, arranged every third core, i.e., with two cores sandwiched between each other, are U-phase split cores 16. The eight split cores 16 arranged every third core, adjacent to the U-phase split cores 16, are V-phase split cores 16. The eight split cores 16 arranged every third core, adjacent to the U-phase split cores 16 and the V-phase split cores 16, are W-phase split cores 16.

[0022] A winding block 80 is formed by winding a coil conductor 60 around each split core 16 via an insulator 30. FIG. 3 is a perspective view of the winding block 80. The winding block 80 includes a split core 16, an insulator 30, and a coil conductor 60. The split core 16 is formed in a substantially T-shape when viewed in the axial direction. The split core 16 has teeth 17 and a back yoke portion 18. The teeth 17 are formed to protrude radially inward from the back yoke portion 18. At least a portion of the teeth 17 is covered by the insulator 30. In other words, the insulator 30 is attached to each split core 16 so as to cover the periphery of the teeth 17. The coil conductor 60 is wound around each tooth 17 from above the insulator 30. The back yoke portion 18 forms a surface extending circumferentially and axially at the outer periphery of the split core 16. Back yoke portion 18 is a portion that forms a ring-shaped magnetic path of stator core 14 when split cores 16 are arranged in a ring shape by ring member 15. Back yoke portion 18 is formed so that the outer periphery of the cross section perpendicular to the axial direction is arc-shaped. Therefore, stator core 14 has a shape in which multiple teeth 17 protrude radially inward from back yoke portion 18, which is connected in a ring shape when viewed in the axial direction.

[0023] The teeth 17 have a tooth body 19 and a flange portion 20. The tooth body 19 extends radially and is the portion that receives the winding of the coil conductor 60 via the insulator 30. The flange portion 20 is connected to the radially inner end of the tooth body 19 and forms a surface that protrudes from the tooth body 19 in the axial and circumferential directions. The tooth body 19 and flange portion 20 are molded as a single unit. The tooth body 19, flange portion 20, and back yoke portion 18 surround a slot, which is a space in which the winding portion 61 of the coil conductor 60 is wound.

[0024] The insulator 30 is configured to include multiple, in this case two, divided members in the axial direction. In this case, the insulator 30 has a first insulator 31 and a second insulator 32. The first insulator 31 is attached to the split core 16 from one axial side of the teeth 17. The second insulator 32 is attached to the split core 16 from the other axial side of the teeth 17. In this case, the first insulator 31 is attached to the split core 16 from above the teeth 17 as shown in FIG. 3, for example, and the second insulator 32 is attached to the split core 16 from below the teeth as shown in FIG. 3, for example. When the insulator 30 is attached to the split core 16, the first insulator 31 and the second insulator 32 engage with each other without any gaps, so that the teeth 17 are not exposed to the outside between the first insulator 31 and the second insulator 32. The coil conductor 60 that is wound around the teeth 17 from above the insulator 30 starts winding from the first insulator 31 side and ends up being pulled out from the second insulator 32 side. In the following explanation, the first insulator 31 side in the axial direction may be referred to as the lower side, and the second insulator 32 side as the upper side, but this is for convenience of explanation and does not necessarily correspond to the actual up-down direction.

[0025] 4 and 5 are perspective views of the second insulator 32 as viewed from the radially inner side and the radially outer side. FIG. 6 is a view of the second insulator 32 as viewed from the side away from the first insulator 31 in the axial direction. FIGS. 7 and 8 are views of the second insulator 32 as viewed from the radially inner side and the radially outer side, respectively. FIG. 9 is a cross-sectional view of the second insulator 32 as viewed from the axial direction along line X9-X9 in FIG. 8. In FIG. 9, a portion of the split core 16 and the coil conductor 60 is indicated by a dashed line. The second insulator 32 has a cover portion 33, an inner wall portion 34, an outer wall portion 35, and an accommodating portion 40. The cover portion 33 has a U-shaped cross section in the axial direction and covers the tooth body 19 from one axial side and both circumferential sides. The inner wall portion 34 and the outer wall portion 35 are integrally molded with the radially inner end and outer end of the cover portion 33 to form surfaces extending in the axial and circumferential directions. The inner wall portion 34 covers the outer peripheral side of the flange portion 20. The outer wall portion 35 covers the inner peripheral side of the back yoke portion 18.

[0026] The accommodating portion 40 is formed integrally with the outer wall portion 35. The accommodating portion 40 bulges radially outward from the outer wall portion 35 and protrudes in the axial direction. In this case, the accommodating portion 40 protrudes in the axial direction away from the connection end portion with the first insulator 31, i.e., toward the opposite side of the first insulator 31. The accommodating portion 40 accommodates the second crossover portion 63 of the coil conductor 60 drawn out radially outward from the cover portion 33 side and the second crossover portion 63 of the coil conductor 60 drawn out from another split core 16. When viewed in the axial direction, the accommodating portion 40 has an outer periphery formed in an arc shape so that it follows the shape of the outer periphery of the back yoke portion 18.

[0027] The accommodation section 40 has a base 41, multiple guide walls 42, multiple guide grooves 43, an extraction groove 44, and a routing passage 45. The base 41 is formed in a generally annular fan shape when viewed in the axial direction. The multiple guide walls 42 are provided to protrude from the base 41. In this case, the multiple guide walls 42 extend from the base 41 in the axial direction away from the end portion connected to the first insulator 31, i.e., upward. Furthermore, the multiple guide walls 42 each form a surface generally perpendicular to the radial direction. The guide walls 42 function as a guide that guides the second bridge section 63 along the guide walls 42.

[0028] The multiple guide walls 42 (four in this case) are arranged at approximately equal intervals. They are referred to as a first guide wall 421, a second guide wall 422, a third guide wall 423, and a fourth guide wall 424, going from the radially inner side to the radially outer side. The radially inner surface of the first guide wall 421 forms a first surface 401, which is the radially inner surface of the accommodation portion 40, i.e., the surface on the teeth 17 side. The radially outer surface of the fourth guide wall 424 forms a second surface 402, which is the radially outer surface of the accommodation portion 40, i.e., the surface on the back yoke portion 18 side. The second guide wall 422 and the third guide wall 423 are provided between the first guide wall 421 and the radially outer fourth guide wall 424.

[0029] The plurality of guide grooves 43 are provided between the first surface 401 and the second surface 402. The plurality of guide grooves 43 extend in the circumferential direction and accommodate the second transition portions 63 separated radially for each phase. Each guide groove 43 is formed between adjacent guide walls 42. The guide grooves 43 function as a passage through which the second transition portions 63 pass. The pull-out grooves 44 are formed by cutting out the circumferential center portion of each guide wall 42 from the upper end to the connection portion with the base 41. Therefore, the pull-out grooves 44 communicate between the radial inside and outside of the accommodation portion 40. The pull-out grooves 44 function as a passage when the second transition portions 63, which have been pulled out from the winding portion 61, are pulled out radially outward.

[0030] The guide groove portions 43 are referred to as a first guide groove portion 431, a second guide groove portion 432, and a third guide groove portion 433, in that order from the radially inner side to the radially outer side. The radially inner first guide groove portion 431 is a guide groove portion 43 formed between the first guide wall 421 and the second guide wall 422. The central second guide groove portion 432 is a guide groove portion 43 formed between the second guide wall 422 and the third guide wall 423. The radially outer third guide groove portion 433 is a guide groove portion 43 formed between the third guide wall 423 and the fourth guide wall 424.

[0031] In this embodiment, the second crossover portion 63U of the U-phase coil conductor wire 60 is inserted into the first guide groove portion 431. The second crossover portion 63V of the V-phase coil conductor wire 60 is inserted into the second guide groove portion 432. The second crossover portion 63W of the W-phase coil conductor wire 60 is inserted into the third guide groove portion 433. The second crossover portions 63 drawn out from the cover portion 33 side and the second crossover portions 63 extending from other winding blocks 80 are inserted into each of the guide groove portions 431, 432, 433. In this embodiment, a maximum of four second crossover portions 63 are inserted into each of the guide groove portions 431, 432, 433.

[0032] One or more (in this case, two) routing passages 45 are formed by cutting out the guide wall 42 between the drawing groove 44 and the circumferential end of the accommodating portion 40. In this case, the routing passages 45 are formed by cutting out the second guide wall 422, the third guide wall 423, and the fourth guide wall 424, other than the radially inner first guide wall 421, from their upper ends to their connection portions with the base 41. The routing passages 45 form openings that communicate between the inside and outside of the accommodating portion 40. As shown in FIG. 9 , the routing passages 45 provide a space that allows the second crossover portion 63, which has been drawn out radially outward through the drawing groove 44, to be routed and changed direction when it is drawn out to one circumferential side through one of the guide grooves 43.

[0033] Each of the guide walls 421, 422, 423, and 424 is divided into a plurality of parts in the circumferential direction by the drawing groove 44 and the routing passage 45. The first guide wall 421 is divided into two parts in the circumferential direction by the drawing groove 44. The second guide wall 422, the third guide wall 423, and the fourth guide wall 424 are each divided into four parts in the circumferential direction by the drawing groove 44 and the routing passage 45.

[0034] The base 41 has a rising portion 411. The rising portion 411 is formed by raising a part of the base 41 between the two routing passages 45, 45 in a direction away from the first insulator 31 in the axial direction. Therefore, the axial length dimension of the second guide wall 422, the third guide wall 423, and the fourth guide wall 424 in the portion protruding from the rising portion 411, i.e., the portion between the routing passages 45, 45, is shorter than the portion protruding from other than the rising portion 411, i.e., the portion circumferentially outside the routing passages 45, 45.

[0035] The rising portion 411 is divided into two in the circumferential direction by the pull-out groove 44. The rising portion 411 also has a recessed portion 412. The recessed portion 412 is formed by recessing the rising portion 411 from the second surface 402 side toward the circumferentially inner side. The position of the radial bottom of the recessed portion 412 roughly coincides with the radially outer surface of the third guide wall 423. As shown in FIG. 9 , the recessed portion 412 functions as a passage that guides the second crossing portion 63, which has been pulled out radially outward of the housing portion 40 through the pull-out groove 44, by turning it approximately 90° in the circumferential direction toward the guide groove 43.

[0036] 9 shows, with a dashed line, a state in which the winding end of the coil conductor 60 has been pulled into the housing section 40 and the second crossover section 63 has been housed in the housing section 40. In this case, the second crossover section 63 is pulled out radially outward through the pull-out groove 44. The pulled-out second crossover section 63 is routed around the rising section 411 in the recess 412 to one side in the circumferential direction. The second crossover section 63 that has reached the routing passage 45 is inserted into one of the guide grooves 431, 432, or 433—in this case, the first guide groove 431. The second crossover section 63 that has been pulled out from the guide groove 43 extends toward the housing section 40 of the adjacent split core 16.

[0037] The free ends of the guide walls 421, 422, 423, and 424, i.e., the ends away from the base 41, are generally on a plane. This plane forms a surface perpendicular to the axial direction. In other words, the heights from the base 41 of the free ends of the guide walls 421, 422, 423, and 424, ignoring the rising portions 411, are set to be generally the same.

[0038] As shown in FIGS. 4 to 8 , the accommodation portion 40 has one or more (in this case, two) hole portions 46 and one or more (in this case, two) protrusion portions 47 as locking portions. The hole portion 46 and the protrusion portion 47 function as locking portions that detachably fix the restricting member 70 to the accommodation portion 40. The hole portion 46 and the protrusion portion 47 are provided on the first surface 401 side and the second surface 402 side of the accommodation portion 40, respectively. The hole portion 46 is provided in the first guide wall 421. The protrusion portion 47 is provided in the fourth guide wall 424. The multiple holes 46 and the multiple protrusion portions 47 are provided symmetrically with respect to the circumferential center line of the accommodation portion 40, i.e., with respect to the drawing groove portion 44.

[0039] The hole 46 is formed by recessing the first surface 401 side of the first guide wall 421 radially outward. The hole 46 has a locking surface 46a and an inclined surface 46b. The locking surface 46a constitutes the surface of the hole 46 away from the base 41 and forms a surface perpendicular to the axial direction. In this specification, a perpendicular surface does not necessarily have to form a surface that intersects with an object at an angle of 90°, but refers to a surface extending in a vector direction that mainly includes a component perpendicular to the object. The inclined surface 46b constitutes the surface of the hole 46 closer to the base 41 and forms a surface inclined with respect to the radial direction. The inclined surface 46b is inclined so that it is farther away from the base 41 as it moves radially outward and closer to the base 41 as it moves radially inward.

[0040] The hole 46 is provided closer to the free end of the first guide wall 421, that is, closer to the end away from the base 41, than to the base 41. For example, the hole 46 is provided closer to the free end than to the midpoint of the axial length of the first guide wall 421. The hole 46 is also provided at a position a predetermined distance away from the free end of the first guide wall 421. The predetermined distance is set to be shorter than half the axial length of the first guide wall 421.

[0041] The protrusion 47 is provided at the upper end of the fourth guide wall 424. Here, the fourth guide wall 424 is configured to include two circumferential inner portions 4241 and a plurality of, in this case, two circumferential outer portions 4242. The protrusion 47 is formed by bulging the upper end of the circumferential outer end of the circumferential inner portion 4241 outward in the circumferential direction. In other words, the protrusion 47 is formed by recessing the portion of the circumferential outer end of the circumferential inner portion 4241, excluding the upper end, near the base 41, inward in the circumferential direction. The protrusion 47 has an engagement surface 47a. The engagement surface 47a forms the surface of the protrusion 47 facing the base 41 and forms a surface perpendicular to the axial direction. The engagement surface 47a of the protrusion 47 is formed on approximately the same plane as the engagement surface 46a of the hole 46. In other words, the distance from the head 71 to the locking surface 47a is set to be approximately the same as the distance from the head 71 to the locking surface 47a.

[0042] The restricting member 70 is formed in a generally rectangular, annular sector, or annular shape when viewed in the axial direction. In this embodiment, the restricting member 70 is formed in a generally rectangular shape as shown in FIGS. 10 to 13. The restricting member 70 at least partially covers each of the guide groove portions 431, 432, and 433 from the opening side of the guide groove portion 43, thereby preventing the second transition portion 63 from falling off each of the guide groove portions 431, 432, and 433. In this embodiment, one restricting member 70 is attached to each storage portion 40. The restricting member 70 can be formed of an insulating synthetic resin such as plastic. The restricting member 70 is attached to the storage portion 40 by fitting with the storage portion 40 by so-called snap fitting.

[0043] The restricting member 70 has a head 71 and a plurality of (in this case, four) leg portions 72. The head 71 is formed in a generally rectangular or annular sector-shaped plate and constitutes the main body of the restricting member 70. The head 71 forms a surface perpendicular to the axial direction. The head 71 at least partially covers the openings of each guide groove portion 431, 432, 433, preventing the second bridge portion 63 from protruding from the openings of each guide groove portion 431, 432, 433. The leg portions 72 are formed to protrude from the head 71 in a direction approaching the base portion 41 in the axial direction. The ends of the leg portions 72 closer to the base portion 41 are free ends, and therefore the leg portions 72 are configured to be elastically deformable.

[0044] In this embodiment, as shown in FIGS. 14 and 15 , the circumferential width of the restricting member 70 is set to be shorter than the circumferential width or arc length of the accommodating portion 40. For example, the circumferential width of the restricting member 70 is set to be equal to or shorter than half the arc length of the accommodating portion 40. The circumferential width of the restricting member 70 is set to be larger than the distance from the end of one circumferential inner portion 4241 on one circumferential side to the end of the other circumferential inner portion 4241 on the other circumferential side. Furthermore, the circumferential width of the restricting member 70 is set to be smaller than the distance from the end of one circumferential outer portion 4242 on the other circumferential side to the end of the other circumferential inner portion 4241 on the one circumferential side. Therefore, when viewed from the radially outer side as shown in FIG. 15 , the restricting member 70, when attached to the accommodating portion 40, is located within the range from one routing passage 45 to another routing passage 45 in the circumferential direction.

[0045] When the restricting member 70 is attached to the housing 40, the surface of the head 71 closer to the base 41 contacts the free ends of the guide walls 421, 422, 423, and 424, i.e., the ends or upper ends away from the base 41. In this embodiment, as shown in FIG. 15 , the surface of the head 71 closer to the base 41 contacts the free ends of the guide walls 421, 422, 423, and 424. Therefore, the restricting member 70 can effectively restrict unwanted movement of the second crossover portion 63 by narrowing the space in which the second crossover portion 63 moves in the axial direction. Furthermore, even when the restricting member 70 is provided, no unnecessary gap is created between the restricting member 70 and the housing 40, and the axial dimension of the rotating electric machine 100 can be made as small as possible.

[0046] The legs 72 include a plurality of inner legs 721 (two in this case) protruding from a radially inner end of the head 71 and a plurality of outer legs 722 (two in this case) protruding from a radially outer end. In this embodiment, the two inner legs 721 are provided protruding from one circumferential end and the other circumferential end of the head 71, respectively. The two outer legs 722 are provided protruding from one circumferential end and the other circumferential end of the head 71, respectively. As shown in FIGS. 10 and 11 , the circumferential outer end of the inner leg 721 is provided slightly inward from an extension of the circumferential end of the head 71. On the other hand, as shown in FIGS. 10 to 13 , the circumferential outer end of the outer leg 722 is provided on an extension of the circumferential end of the head 71. This makes it easier for an operator to confirm the installation direction when attaching the restricting member 70 to the housing 40, thereby preventing incorrect installation.

[0047] As shown in Figures 10 to 13, each of the legs 721, 722 has a claw portion 73. When the regulating member 70 is attached to the storage portion 40, the claw portion 73 fits into the hole portion 46 or the protrusion 47 to fix the regulating member 70 to the storage portion 40. The claw portion 73 protrudes from the free end of each of the legs 721, 722, i.e., the end away from the head 71, toward the center of the regulating member 70. The claw portion 73 has an engaging surface 73a and an inclined surface 73b. The engaging surface 73a is the surface of the claw portion 73 facing the head 71 and forms a surface perpendicular to the axial direction. The inclined surface 73b is the surface of the claw portion 73 facing away from the head 71 and forms a surface inclined with respect to the axial direction.

[0048] The inner claws 731 provided on the inner leg 721 protrude in the radial direction. In this embodiment, the inner claws 731 protrude outward from the inner leg 721. That is, the inner claws 731 provided on the two inner legs 721 protrude in the same direction. FIG. 17 is a cross-sectional view of the second insulator 32 taken along X17-X17 in FIG. 16 with the restricting member 70 attached. FIG. 18 is an enlarged view of the accommodating section 40 in FIG. 17. As shown in FIGS. 17 and 18, the inner claws 731 are received and fitted into the hole 46 when the restricting member 70 is attached to the accommodating section 40. The locking surfaces 73a of the inner claws 731 are in contact with or close to the locking surfaces 46a of the hole 46. The inclined surfaces 73b of the inner claws 731 are inclined so as to approach the base 41 as they extend radially inward and move away from the base 41 as they extend radially outward.

[0049] As shown in Figures 10 to 12 and 15, the outer claws 732 provided on the outer legs 722 protrude circumferentially from the outer legs 722. In this embodiment, the outer claws 732 protrude circumferentially inward from the outer legs 722, i.e., toward the circumferential center of the restricting member 70. In other words, the outer claws 732 provided on the two outer legs 722 protrude to face each other. The outer claws 732 fit into the protrusions 47 when the restricting member 70 is attached to the accommodating section 40. The locking surfaces 73a of the outer claws 732 are in contact with or close to the locking surfaces 47a of the protrusions 47. In this embodiment, the locking surfaces 73a of the outer claws 732 are in contact with the locking surfaces 47a of the protrusions 47, as shown in Figure 15, etc. The inclined surface 73b of the outer claw portion 732 is inclined so as to move away from the base portion 41 as it goes inward in the circumferential direction and to move closer to the base portion 41 as it goes outward in the circumferential direction.

[0050] 15 or 17, that is, as the restricting member 70 is moved toward the accommodation portion 40 from a position above the plane of the drawing in FIG. 15 or 17, i.e., from a position distant from the base portion 41 in the axial direction, the tips of the legs 721 and 722 come into contact with the first guide wall 421 and the fourth guide wall 424, respectively. If the restricting member 70 is then moved in the same axial direction, the legs 721 and 722 become distorted due to their elasticity, and the tips of the legs 721 and 722 become open further outward from the restricting member 70 than the head portion 71. The contact point between the inner leg 721 and the first guide wall 421 moves along the inclined surface 73b of the inner claw 731, and the inner claw 731 becomes positioned radially inward from the first guide wall 421. Furthermore, the contact point between the outer leg 722 and the circumferentially outer portion 4242 of the fourth guide wall 424 moves along the inclined surface 73b of the outer claw portion 732, and the outer claw portion 732 of the outer leg 722 is positioned circumferentially outer than the circumferentially outer portion 4242. When the restricting member 70 is further moved in the axial direction, the claw portion 731 is received in the hole portion 46 of the first guide wall 421, as shown in FIG. 17, and the distortion of the inner leg 721 is eliminated. Furthermore, as shown in FIG. 15, the claw portion 732 is received in a recess formed below the protrusion 47 of the fourth guide wall 424, and the distortion of the outer leg 722 is eliminated. In this manner, the restricting member 70 is attached to the accommodation portion 40.

[0051] Consider the case where the regulating member 70, while attached to the accommodating portion 40, is pulled in the axial direction away from the accommodating portion 40. In this case, the locking surface 73a of the inner claw portion 731 contacts the locking surface 46a of the hole 46, and the locking surface 73a of the outer claw portion 732 contacts the locking surface 47a of the protrusion 47. In this manner, the axial movement of the regulating member 70 is restricted. Note that by applying a sufficient external force to each leg portion 721, 722, the distal ends of each leg portion 721, 722 are elastically deformed so as to open outward from the regulating member 70, the engagement between the claw portions 731, 732 and the locking portions serving as the hole 46 and the protrusion 47 can be released. In this state, the regulating member 70 can be removed from the accommodating portion 40 by moving the regulating member 70 in the axial direction away from the accommodating portion 40. In other words, the regulating member 70 is detachably attached to the accommodating portion 40.

[0052] As described above, the plurality of holes 46 and the plurality of protrusions 47 are each arranged line-symmetrically with respect to the center of the circumferential direction of the accommodating section 40, in this case, the pull-out groove 44. This allows the second bridge section 63 to be fixed in a balanced manner over the entire circumferential direction of the accommodating section 40 when the second bridge section 63 is fixed.

[0053] The multiple winding blocks 80 configured in this manner are arranged consecutively in the circumferential direction, for example, in the order of U phase, V phase, and W phase. The winding start and winding end of the coil conductor 60 drawn from the cover portion 33 of the insulator 30 of each winding block 80 are connected. Although not shown in detail, the stator 10 is composed of three phases, U phase, V phase, and W phase, and the coil conductor 60 is star-connected. The first crossover portion 62, which is the winding start side of the coil conductor 60 drawn from the first insulator 31 side, serves as the neutral point, and the first crossover portions 62 of the three phases are connected to each other. In this case, the ends of the first crossover portions 62 of three adjacent winding blocks 80 are connected by, for example, pressurized, current-applied thermal welding. In this embodiment, there are eight welded locations throughout the stator 10. The second crossover section 63, which is the winding end side of the coil conductor 60 drawn out from the drawing groove section 44 of the second insulator 32, is connected to the power supply terminals 90U, 90V, and 90W of the corresponding phase as shown in Figure 1, with the same phases connected together.

[0054] The manufacturing procedure for the stator 10 will be described with reference to Fig. 19. When the manufacturing of the stator 10 begins (START), in step S11, the first insulator 31 and the second insulator 32 are attached to the split core 16. In step S12, the winding portion 61 of the coil conductor 60 is wound around the tooth body 19 of the split core 16 via the cover portion 33 of the insulator 30. In step S13, the winding end portion of the coil conductor 60, i.e., the second crossover portion 63, is pulled out from the pull-out groove portion 44 of the second insulator 32 toward the accommodating portion 40. The winding start portion is pulled out toward the accommodating portion 311 of the first insulator 31, the details of which are not shown.

[0055] In step S14, the multiple winding blocks 80 around which the coil wires 60 are wound are press-fitted into the ring member 15 and accommodated. As a result, the split cores 16 are arranged in an annular shape to form the stator core 14. In step S15, the second crossover portions 63 are routed through the routing passages 45 and accommodated in the guide grooves 43 of the accommodation portion 40. In step S16, the ends of the second crossover portions 63 are welded for each of the U, V, and W phases. In this case, the ends of the eight second crossover portions 63 for each phase may be welded by pressure welding, such as pressure-current thermal welding or resistance welding, in which welding is performed using heat generated by applying pressure while passing current.

[0056] In step S17, the ends of the first transition portions 62 of three adjacent winding blocks 80 are welded together. This connects the neutral points of the coil conductors 60. The ends of the first transition portions 62 may be welded together by pressure welding, such as pressurized current thermal welding or resistance welding. In step S18, the first transition portions 62, including the unwelded portions and the welded portions, are accommodated in the accommodation portion 311 on the first insulator 31 side.

[0057] In step S19, the restricting member 70 is attached. In step S17, the restricting member 70 is attached to the accommodating portion 40. As a result, the second crossover portion 63 is fixed to the accommodating portion 40 by the restricting member 70. In step S20, the stator core 14 is housed in a stator case, the details of which are not shown. Specifically, a ring member 15, which houses a plurality of winding blocks 80 arranged in a circular ring shape inside, is press-fitted into the stator case. In this manner, the stator 10 is manufactured.

[0058] Furthermore, the stator 10 manufactured in this manner is combined with the rotor 11 and the like by any known method to manufacture the rotating electric machine 100.

[0059] If the crossover portion 63 of the coil conductor 60 protrudes from the accommodation portion 40, there is a risk that the coil conductor 60 may become unwound. Although a method of fixing the crossover portion 63 with a binding thread is known, the binding thread itself may shift in the circumferential direction, etc., and protrusion of the crossover portion 63 cannot be sufficiently prevented.

[0060] In contrast, according to the present embodiment described above, the stator 10 includes a winding block 80, multiple split cores 16, an insulator 30 including a first insulator 31 and a second insulator 32, a coil conductor 60, and a restricting member 70. The winding block 80 is arranged in an annular shape. The multiple split cores 16 constitute parts of the multiple winding blocks 80 and are combined with each other to form the annular stator core 14. The insulator 30 constitutes part of the multiple winding blocks 80 and is attached to each of the multiple split cores 16. The coil conductor 60 constitutes part of the multiple winding blocks 80 and has a winding portion 61 wound around each of the multiple split cores 16 via the insulator 30, and a first crossover portion 62 and a second crossover portion 63 as crossover portions drawn from the winding portion 61. The restricting member 70 restricts movement of the coil conductor 60. The second insulator 32 has an accommodating portion 40 that accommodates the second crossover portion 63. The accommodating portion 40 has one or more (in this case three) grooves serving as guide grooves 431, 432, and 433. The guide grooves 431, 432, and 433 extend along the circumferential direction of the stator core 14 and are recessed in the axial direction of the stator core 14. The restricting member 70 is attached to the accommodating portion 40 in a state in which the restricting member 70 at least partially covers the openings of each of the plurality of guide grooves 431, 432, and 433.

[0061] According to this, by attaching the restricting member 70 to the accommodating portion 40, it is possible to prevent the transition portion 63 from falling off from the accommodating portion 40. Therefore, the stator 10 can reduce the occurrence of short circuits and the like in the rotating electric machine 100. Moreover, since it is only necessary to attach the restricting member 70 to the accommodating portion 40, it is possible to extremely easily prevent the transition portion 63 from falling off. Therefore, it is possible to provide the stator 10 that can appropriately fix the coil conductor 60 in a simple manner.

[0062] The stator 10 includes a stator core 14, a ring member 15, a plurality of split cores 16, an insulator 30 including a first insulator 31 and a second insulator 32, a coil conductor 60, and a restricting member 70. The stator core 14 is formed in an annular shape. The plurality of split cores 16 are combined with one another to form the stator core 14. The ring member 15 is also formed in an annular shape and accommodates the plurality of split cores 16 arranged in an annular shape inside.

[0063] The restricting member 70 has a head 71, a plurality of legs 72, and a claw 73. The head 71 forms a surface perpendicular to the axial direction of the stator core 14. The plurality of legs 72 protrude from the head 71 toward the accommodating portion 40. The claw 73 is provided at the end of each of the plurality of legs 72. The accommodating portion 40 has a plurality of holes 46 and a plurality of protrusions 47 as locking portions that receive the claw 73.

[0064] This allows for extremely easy installation, as the restricting member 70 is attached to the accommodating portion 40 by fitting the restricting member 70 into the hole 46 and the protrusion 47 serving as the locking portion. Also, the restricting member 70 has a structure that prevents it from being easily removed once attached to the accommodating portion 40. Therefore, the stator 10 is provided in which the coil conductor 60 can be appropriately fixed in place by a simple method.

[0065] The multiple legs 72 are provided to protrude from the radially inner end and the radially outer end of the stator core 14 in the head 71. According to this embodiment, the legs 72 are provided within a region obtained by extending the head 71 in the axial direction.

[0066] As a result, the inner leg portion 721 and the outer leg portion 722 can fix the regulating member 70 to the accommodating portion 40 from the radially inner and outer sides. This makes it even more difficult for the regulating member 70 to come off. Furthermore, according to this embodiment, the leg portion 72 does not protrude radially inward or outward from the head portion 71, so the radial dimension of the regulating member 70, and therefore the radial dimension of the rotating electric machine 100, can be set as small as possible.

[0067] Here, in order to make the outer diameter of the rotating electric machine 100 as small as possible, it is desirable to make the radially outer surface of the restricting member 70 flush with the radially outer surface of the accommodation portion 40, that is, to make them flush with each other. In this case, it is also conceivable to design the radially outer surface of the outer leg portion 722 to be flush with the second surface 402 by, for example, reducing the radial thickness of the circumferentially inner portion 4241 of the fourth guide wall 424. However, in this case, there is a risk that the strength of the fourth guide wall 424 will be reduced.

[0068] In contrast, outer claw portions 732 formed on outer leg portions 722 provided in the head portion 71 so as to protrude from the radially outer end portion of the stator core 14 are formed so as to protrude in the circumferential direction of the stator core 14. In this embodiment, the outer claw portions 732 are formed so as to protrude inward in the circumferential direction of the stator core 14.

[0069] This makes it easy to design the radially outer surface of the outer leg portion 722 to be flush with the radially outer surface of the fourth guide wall 424, i.e., the second surface 402, without reducing the strength of the guide wall 424. In this case, the restricting member 70 does not protrude from the outer peripheral surface of the accommodating portion 40, i.e., the second surface 402, and therefore the influence on the outer diameter of the rotating electric machine 100 can be suppressed.

[0070] The stator 10 includes a plurality of restricting members 70. Each of the restricting members 70 is attached to a receiving portion 40 provided in each of the second insulators 32.

[0071] According to this, since the restricting member 70 is attached to each accommodation section 40, it is easy to reliably fit the claw portions 73 with the locking portions, that is, the hole portions 46 and the protrusion portions 47. Furthermore, since a relatively small mold can be used when manufacturing the restricting member 70 by injection molding or the like, it is possible to reduce manufacturing costs.

[0072] The insulator 30 of this embodiment is attached to a plurality of split cores 16 that are combined with each other to form the annular stator core 14. The insulator 30 includes an accommodating portion 40 that accommodates a bridge portion 63 of a coil conductor 60. The accommodating portion 40 includes guide grooves 431, 432, and 433 as grooves, guide walls 421, 422, 423, and 424 as walls, and a hole 46 and a protrusion 47 as locking portions. The guide grooves 431, 432, and 433 are recessed in the axial direction of the stator core 14 along the circumferential direction of the stator core 14. The first guide wall 421 is formed radially inward of the stator core 14 relative to the guide grooves 431, 432, and 433. The fourth guide wall 424 is formed radially outward of the stator core 14 relative to the guide grooves 431, 432, and 433. The hole portion 46 and the protrusion portion 47 receive and fix the claw portion 73 of the regulating member 70 attached to the storage portion 40 while at least partially covering the openings of each of the multiple guide groove portions 431, 432, 433 formed in the first guide wall 421 and the fourth guide wall 424, respectively.

[0073] According to this, by attaching the restricting member 70 to the accommodating portion 40, it is possible to prevent the transition portion 63 from falling off from the accommodating portion 40. Therefore, the insulator 30 can reduce the occurrence of short circuits and the like in the rotating electric machine 100. Furthermore, since the restricting member 70 is easily attached to the accommodating portion 40 by a so-called snap fit, it is possible to extremely easily prevent the transition portion 63 from falling off. Therefore, the insulator 30 is provided that can appropriately fix the coil conductor 60 in a simple manner.

[0074] Furthermore, according to this embodiment, the rotating electric machine 100 includes the stator 10 or the stator 10 having the insulator 30, and the rotor 11. As a result, as described above, the rotating electric machine 100 is provided in which the coil conductor 60 can be appropriately fixed in a simple manner.

[0075] (Second embodiment) Next, a second embodiment will be described with reference to FIG. 20 . In this embodiment, the rotating electric machine 100 includes a regulating member 200 instead of the regulating member 70 of the first embodiment. One regulating member 200 is attached to the accommodation portion 40 provided in each of the divided cores 16. In this case, one regulating member 200 can be attached to every divisor N1 of the number of divided cores 16, i.e., the number of slots N, in this case, every 2, 3, 4, 6, 12, or 24 consecutive divided cores 16. In this embodiment, one regulating member 200 is attached to every 24 divided cores 16. In other words, one regulating member 200 is attached to the entire stator core 14.

[0076] The regulating member 200 has a shape obtained by connecting the regulating members 70 of the first embodiment in an annular or annular sector shape. Although not shown in detail, the regulating member 200 has an annular or annular sector-shaped head portion, legs protruding from the head portion, and claw portions. In this embodiment, the regulating member 200 is formed in an annular shape when viewed in the axial direction. Note that if a regulating member 200 is configured to be attached to each of consecutive divided cores 16 that are a divisor N1 of the number of slots N, for example, every 2, 3, 4, 6, or 12, the regulating member 200 can be formed in an annular sector shape when viewed in the axial direction.

[0077] Although not shown in detail, the claws of the regulating member 200 are configured similarly to the claws 731, 732 of the regulating member 70 of the first embodiment. The claws of the regulating member 200 may be provided for all of the corresponding accommodating sections 40, or may be provided for some of the corresponding accommodating sections 40. In the latter case, the claws 73 may be provided corresponding to the holes 46 and protrusions 47 provided in the accommodating sections 40 of a plurality of winding blocks 80, for example, every third winding block 80.

[0078] Furthermore, in this case, the second insulators 32 having the holes 46 and the protrusions 47 may be attached to a plurality of, for example, every third split core 16, and the remaining split cores 16 may be attached to the second insulators 32 having no holes 46 or protrusions 47. On the other hand, if all the second insulators 32 have the holes 46 and the protrusions 47, it is possible to prevent an increase in the number of parts and to prevent the assembly work from becoming complicated.

[0079] This embodiment also provides the same effects as the first embodiment.

[0080] Furthermore, according to the present embodiment described above, the restricting member 200 is attached to a plurality of insulators 30. In this embodiment, the restricting member 200 is attached to the insulators 30 that are attached to all of the split cores 16 that make up the stator core 14.

[0081] This allows one restricting member 200 to restrict the transition portions 63 housed in the housing portions 40 provided in the multiple insulators 30. Therefore, the number of times the restricting member 200 is attached can be reduced, which simplifies the manufacture of the stator 10.

[0082] (Other embodiments) In each of the above embodiments, the outer claw portions 732 protrude inward in the circumferential direction and the convex portions 47 are formed on the circumferential inner portion 4241 of the fourth guide wall 424. However, this is not limiting. For example, the outer claw portions 732 may protrude outward in the circumferential direction and the convex portions 47 may be formed on the circumferential outer portion 4242 of the fourth guide wall 424.

[0083] In each of the above embodiments, the radially inner claw portions 731 protrude radially outward and the radially inner locking holes 46 are recessed radially outward, but the radially inner claw portions 731 may protrude circumferentially and the radially inner locking holes 46 may be recessed circumferentially. In this case, the holes 46 may be configured to receive the claw portions 731 by providing notches in the upper end of the first guide wall 421.

[0084] Furthermore, both the inner claw portion 731 and the outer claw portion 732 may have a shape that protrudes radially. For example, a protrusion that protrudes radially outward beyond the second surface 402 may be formed at the upper end of the circumferentially inner portion 4241 of the fourth guide wall 424. Alternatively, a hole recessed radially inward may be provided on the radially outer side of the circumferentially inner portion 4241, i.e., on the second surface 402 side, to receive the outer claw portion 732. In this case, the restricting members 70, 200 protrude radially outward beyond the accommodating portion 40, but the effects of the above-described embodiments can generally be achieved.

[0085] In the first embodiment, the circumferential width of the restricting member 70 is set to be shorter than the circumferential width or arc length of the accommodating portion 40, but this is not limited thereto. For example, the circumferential width of the restricting member 70 may be set to be the same as the circumferential width or arc length of the accommodating portion 40. In this case, for example, the hole 46 may be provided near the circumferential end of the first guide wall 421, and the protrusion 47 may be provided at the circumferential outer end of the circumferential outer portion 4242. With this configuration, the openings of the guide grooves 431, 432, and 433 are covered across the entire width of the accommodating portion 40, thereby more effectively preventing the transition portion 63 from falling off.

[0086] Furthermore, in each of the above-described embodiments, the head 71 of the regulating member 70, 200 is configured to protrude from the end of the accommodation portion 40 in the axial direction away from the base 41, but this is not limiting. The head 71 of the regulating member 70, 200 may be configured not to protrude from the axial end of the accommodation portion 40. In this case, for example, in a region overlapping with the regulating member 70 as viewed in the axial direction, the free end of each guide wall 421, 422, 423, 424 can be recessed in the axial direction toward the base 41. This can prevent the axial length of the stator 10 from increasing, and consequently the axial length of the rotating electric machine 100 from increasing.

[0087] Furthermore, in each of the above embodiments, the second transition portion 63 accommodated in the accommodation portion 40 of the second insulator 32 is fixed by the restricting member 70. However, this is not limited to this. For example, the first transition portion 62 accommodated in the accommodation portion 311 of the first insulator 31 may be fixed by the restricting member 70. In this case, although not shown in detail, the accommodation portion 311 may have one or more grooves extending circumferentially and recessed in the axial direction. The restricting member 70 can be attached to the accommodation portion 311 while at least partially covering the openings of the grooves formed in the accommodation portion 311. This makes it possible to restrict movement of the first transition portion 62 accommodated in the accommodation portion 311. In this case, the accommodation portion 311 may have multiple locking portions that receive the claws 73 of the restricting member 70.

[0088] Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the inventions and their equivalents as defined in the claims. [Explanation of symbols]

[0089] 10... stator, 11... rotor, 15... stator core, 17... divided core, 30... insulator, 31... first insulator (insulator), 32... second insulator (insulator), 40... accommodation section, 401... first surface, 402... second surface, 42... guide wall (wall portion), 421... first guide wall (wall portion), 422... second guide wall (wall portion), 423... third guide wall (wall portion), 424... fourth guide wall (wall portion), 43...guide groove portion (groove portion), 431...first guide groove portion (groove portion), 432...second guide groove portion (groove portion), 433...third guide groove portion (groove portion), 46...hole portion (locking portion), 47...protrusion portion (locking portion), 60...coil conductor, 61...winding portion, 62...first transition portion, 63...second transition portion (transition portion), 70...regulating member (first embodiment), 71...head portion, 72...leg portion, 73...claw portion, 100...rotating electric machine, 200...regulating member (second embodiment)

Claims

1. a plurality of winding blocks arranged in a circular ring; a plurality of split cores that form part of the plurality of winding blocks and that are combined with each other to form an annular stator core; an insulator that constitutes a part of the plurality of winding blocks and is attached to each of the plurality of divided cores; a coil conductor that forms part of the plurality of winding blocks and has a winding portion that is wound around each of the plurality of split cores via the insulator, and a jumper portion that is drawn out from the winding portion; a restricting member that restricts movement of the coil conductor, the insulator has a housing portion that houses the transition portion, The storage section is one or more grooves extending along the circumferential direction of the stator core and recessed in the axial direction of the stator core; The restricting member is attached to the accommodating portion in a state where the restricting member does not protrude from the accommodating portion in the radial direction of the stator core and at least partially covers each opening of the one or more groove portions. stator.

2. the restricting member has a head portion that forms a surface perpendicular to the axial direction of the stator core, a plurality of legs that protrude from the head portion toward the accommodating portion, and a claw portion provided at an end of each of the plurality of legs, The receiving portion has a plurality of locking portions that receive the claw portions. The stator of claim 1 .

3. The plurality of legs are provided so as to protrude from a radially inner end and a radially outer end of the stator core in the head portion, respectively. The stator according to claim 2 .

4. The claws formed on the legs of the head portion protruding from the radially outer end of the stator core are formed to protrude in the circumferential direction of the stator core. The stator according to claim 3 .

5. A plurality of the restricting members are provided, Each of the plurality of restricting members is attached to a receiving portion provided in the insulator. A stator according to any one of claims 1 to 4.

6. The restricting member is attached to the plurality of insulators. A stator according to any one of claims 1 to 4.

7. An insulator attached to a plurality of divided cores that are combined with each other to form an annular stator core, a housing portion for housing a crossover portion of the coil conductor; The storage section is one or more grooves formed by recessing the stator core in an axial direction along a circumferential direction of the stator core; a wall portion formed on a radially inner side of the stator core relative to the one or more groove portions; and a wall portion formed on a radially outer side of the stator core. and a locking portion formed on each of the wall portion formed on the radially inner side and the wall portion formed on the radially outer side, the locking portion receiving and fixing a restricting member attached to the accommodating portion in a state in which the restricting member does not protrude in the radial direction of the stator core beyond the accommodating portion and at least partially covers each opening of the one or more groove portions. Insulator.

8. A rotating electric machine comprising: a stator having the stator according to any one of claims 1 to 6 or the insulator according to claim 7; and a rotor.

Images