JP2018153056A - Insulator, stator and electric motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology for holding an insulation member insulating a stator coil wire wound on an insulator and a yoke, reliably between the insulator and the yoke.SOLUTION: In a first flange 210 of an insulator 200 attached to tooth 121 of a stator core 100, recesses 280 and 290 recessed from an outer peripheral surface 210A are formed on the lateral face 213 side and the lateral face 214 side of through holes 270. The recess 280 is open on the outer peripheral side in a radial direction and on the lateral face 213 side. The recess 290 is open on the outer peripheral side in the radial direction and on the lateral face 214 side. A marginal part 10a on one side of an insulation member 10 in a circumferential direction and a marginal part 10b on the other side in the circumferential direction are placed, respectively, in the recess 290 of one insulator 200 and the recess 280 of the other insulator 200 out of two insulators 200 adjacent in the circumferential direction.SELECTED DRAWING: Figure 11

Description

  The present invention relates to an insulator attached to a tooth when a stator winding is wound around a tooth of a stator core by a concentrated winding method.

As a compressor drive motor, a vehicle drive motor, an in-vehicle device drive motor, etc., an electric motor having a stator and a rotor, and stator windings wound around teeth of a stator core constituting the stator in a concentrated winding manner ( "Concentrated winding motor") is used. In the concentrated winding motor, the stator winding is wound around the teeth via an insulator attached to the teeth.
Further, in such a concentrated winding motor, in order to increase the space factor of the stator winding by increasing the number of windings of the stator winding, a stator core composed of a plurality of split cores (“fixing the split structure”). An electric motor using a so-called “child core” has been proposed.
An electric motor using a stator core having a split structure is disclosed in, for example, Japanese Patent Application Laid-Open No. 2007-259514. In the electric motor disclosed in Patent Document 1, the stator core includes a first core member having teeth and a second core member having yokes. Moreover, it has the insulator with which a tooth | gear is mounted | worn. The stator core disclosed in Patent Document 1 includes a first core member and a second core member in a state where an insulator around which a stator winding is wound is attached to each tooth of the first core member. It is formed by assembling.
In the stator using the stator core having such a divided structure, an insulating member is disposed between the insulator and the yoke in order to prevent the stator winding wound around the insulator from coming into contact with the yoke. Is done. A stator in which an insulating member is disposed between an insulator and a yoke is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-225490. In the stator disclosed in Patent Document 2, the teeth are covered with an insulator, and the insulating member is placed in the space between the protruding portion of the insulator and the yoke in the thickness direction of the stator core ( It is inserted so as to penetrate in the axial direction.

JP 2007-259514 A JP-A-6-225490

In the stator disclosed in Patent Document 2, the insulating member may move in the axial direction during assembly work of the stator or the motor, and the insulating member may move in the axial direction due to vibration or the like during motor operation. There is.
The present invention has been devised in view of such points, and an insulating member that insulates a stator winding and a yoke wound around an insulator mounted on a tooth is provided between the insulator and the yoke. It aims at providing the technique which can be hold | maintained reliably in between.

The first invention relates to an insulator attached to a tooth. The insulator of the present invention is suitably used for a stator core having a yoke extending along the circumferential direction and a tooth extending radially inward from the yoke along the radial direction.
The insulator of the present invention has a first collar part, a second collar part, a body part, and a through hole. The first flange extends along the axial direction and the circumferential direction, the first flange outer peripheral surface on the radial outer peripheral side, the first flange inner peripheral surface on the radial inner peripheral side, and one axial direction side. The first collar end face, the second collar end face on the other axial side, the first collar side face on one circumferential side, and the second collar side face on the other circumferential side. The second collar is disposed on the radially inner side from the first collar, extends along the axial direction and the circumferential direction, and has a second collar outer peripheral surface and a radially inner side on the radially outer side. A second flange inner peripheral surface is provided on the peripheral side. The trunk portion is provided between the first flange portion and the second flange portion, and extends along the radial direction. The through-hole extends along the radial direction through the body portion, and opens to the first flange outer peripheral surface and the second flange inner peripheral surface.
“Radial outer peripheral side” and “radial inner peripheral side” indicate a side facing the yoke and a side opposite to the side facing the yoke along the radial direction. “Axial direction one side” and “axial direction other side” may be any direction along the axial direction. The “circumferential one side” and the “circumferential other side” may be any direction along the circumferential direction.
And a 1st collar part has the 1st recessed part and the 2nd recessed part which are depressed in the radial direction inner peripheral side from the 1st collar part outer peripheral surface. The first recess is provided on the first collar side surface side with respect to the through hole, and extends along the axial direction and the circumferential direction, and the radial outer circumferential side and the first collar side surface side are opened. Yes. The second recess is provided on the second flange side surface side with respect to the through hole, and extends along the axial direction and the circumferential direction, and the radial outer periphery side and the second flange side surface side are opened. Yes.
In this invention, it winds around an insulator with the 1st recessed part and the 2nd recessed part which are provided in the 1st collar part and the other side is open to the radial direction outer peripheral side and the circumferential direction. The insulating member that insulates the stator winding and the yoke can be reliably held, and the movement of the insulating member can be prevented.
In another form of the first invention, the first recess is formed by the first bottom surface and the first to third wall surfaces. The first bottom surface extends along the axial direction and the circumferential direction. The first wall surface is connected to the first end portion of the first bottom surface on the first flange end surface side, and extends to the circumferential direction and the radially outer circumferential side. The second wall surface is connected to the second end portion of the first bottom surface on the second flange end surface side, and extends in the circumferential direction and the radially outer peripheral side. The third wall surface is connected to the third end portion on the through hole side of the first bottom surface, and extends in the axial direction and the radially outer peripheral side. The second recess is formed by the second bottom surface and the fourth to sixth wall surfaces. The second bottom surface extends along the axial direction and the circumferential direction. The fourth wall surface is connected to the fourth end portion of the second bottom surface on the first flange end surface side, and extends in the circumferential direction and the radially outer peripheral side. The fifth wall surface is connected to the fifth end portion of the second bottom surface on the second flange end surface side, and extends in the circumferential direction and the radially outer peripheral side. The sixth wall surface is connected to the sixth end portion on the through hole side of the second bottom surface, and extends in the axial direction and the radially outer peripheral side. The first bottom surface, the first to third wall surfaces, the second bottom surface, and the fourth to sixth wall surfaces are preferably formed on a flat surface (including a “substantially flat surface”). The configuration in which “the wall surface extends along the radial direction (to the outer periphery in the radial direction)” is an aspect in which “the wall surface extends in a direction perpendicular to the bottom surface (including“ substantially right angle ”)” or “the wall surface is the bottom surface To extend in a direction inclined with respect to a direction perpendicular to the direction.
In this embodiment, the insulating member can be held more reliably.
In another form of the first invention, the first flange has a first protrusion and a second protrusion that protrude radially outward from the outer surface of the first flange. The first protrusion is formed in a region on the first flange side surface side on the first flange end surface side with respect to the through hole, and the second protrusion is first with respect to the through hole. It is formed in the area | region of the 2nd collar part side surface by the collar part end surface side. And at least a part of the first wall surface and the third wall surface of the first recess is formed by the outer wall surface of the first protrusion, and at least of the fourth wall surface and the sixth wall surface of the second recess. A part is formed by the outer wall surface of the second protrusion. That is, at least a part of the first wall surface and the third wall surface forming the first recess and at least a part of the fourth wall surface and the sixth wall surface forming the second recess are the first flange portion. It protrudes radially outward from the outer peripheral surface.
In this embodiment, when the insulating member is inserted from the first flange end surface side between the first flange portion of the insulator and the yoke of the stator core, the insulating member is reliably arranged at a predetermined position. be able to.
The first protrusion and the second protrusion are used when, for example, the end portion of the tooth inserted into the through hole and protruding from the through hole is press-fitted into the concave portion formed in the yoke. A path for the press-fitting jig is formed. Alternatively, the first protrusion and the second protrusion are formed with a groove, a notch, or a locking protrusion for fixing the end of the stator winding.

The second invention relates to a stator.
The stator of the present invention includes a stator core, an insulator, a stator winding, and an insulating member. The stator core has a yoke extending along the circumferential direction when viewed in a cross section perpendicular to the axial direction, and a plurality of teeth extending radially inward from the yoke along the radial direction. Yes. Each tooth has a tooth base extending radially inward from the yoke and a tooth tip provided on the radially inner periphery of the tooth base and extending in the circumferential direction. doing. An insulator is attached to each tooth. In addition, a stator winding is wound around the insulator attached to each tooth.
In the present invention, any of the above-described insulators is used as the insulator. An insulating member that insulates the stator winding from the yoke is disposed between the insulator and the yoke. In addition, the arrangement | positioning aspect of an insulating member should just be able to insulate a stator winding | coil and a yoke with an insulating member, and the aspect in which at least one part of an insulating member is arrange | positioned between an insulator and a yoke is included.
The insulating member has a first edge on one side in the circumferential direction and a second edge on the other side in the circumferential direction. The insulating member is preferably made of an insulating film formed of a resin having insulating properties, for example, a polyethylene terephthalate resin or a polyethylene naphthalate resin. Preferably, the insulating film has a rectangular shape (strip shape) having a first edge and a second edge, or a rectangular shape having a first edge and a second edge. The insulating film is formed by bending the insulating film into a V shape.
In the present invention, the first edge of the insulating member is inserted into the second concave portion of the insulator on one side in the circumferential direction of the two insulators adjacent in the circumferential direction, and the second edge is It is inserted into the first recess of the insulator on the other side in the direction.
In the present invention, the insulating member that insulates the stator winding and the yoke wound around the insulator can be reliably held between the insulator and the yoke, and the movement of the insulating member can be prevented.
In another form of the second invention, the insulating member includes a first edge portion including a first edge portion, a second edge portion including a second edge portion, a first edge portion and a second edge portion. It has a first central portion and a second central portion provided between the edge portions and is bent into a V shape (including “substantially V shape”) when viewed from a direction perpendicular to the axial direction. ing. The first central portion and the second central portion of the insulating member are disposed so as to extend along the radial direction between the insulator on one side in the circumferential direction and the insulator on the other side in the circumferential direction. ing. Preferably, the first central portion and the second central portion are arranged between the circumferentially adjacent stator windings of different phases. In this case, the insulating member has a function of insulating the stator winding and the yoke, and a function of insulating the stator windings of different phases (“inter-phase insulation”).
In this embodiment, the insulating characteristics of the stator can be improved with a simple configuration.
In another form of the second invention, the stator core is constituted by a first core member having teeth and a second core member having yokes. The stator core is formed by assembling the first core member and the second core member. For example, a method is used in which the end portion of the tooth of the first core member is press-fitted into a concave portion formed on the yoke inner peripheral surface of the yoke of the second core member.
In this embodiment, since the stator winding can be wound around the insulator before the first core member and the second core member are assembled, the number of stator windings can be increased to increase the number of stator windings. The product ratio can be increased.

The third invention relates to an electric motor.
The electric motor of the present invention includes a stator and a rotor that can rotate relative to the stator. Any of the stators described above is used as the stator.
The electric motor of the present invention is preferably used as a compressor driving electric motor, a vehicle driving electric motor, and an in-vehicle device driving electric motor, but can be used for various other applications.
The present invention has the same effect as any of the above-described insulators or any of the above-described stators.

  In the insulator, the stator and the electric motor of the present invention, the insulating member that insulates the stator winding and the yoke wound around the insulator attached to the teeth is securely held between the insulator and the yoke. can do.

It is a perspective view of 1st Embodiment of the stator of this invention. It is a figure which shows schematic structure of the stator core used with the stator of 1st Embodiment. It is a perspective view of a 1st embodiment of an insulator of the present invention. It is the figure which looked at FIG. 3 from the direction of arrow IV. It is sectional drawing which looked at FIG. 3 from the VV line. It is the figure which looked at FIG. 3 from the direction of arrow VI. It is the figure which looked at FIG. 3 from the direction of arrow VII. It is a figure explaining the operation | movement which mounts | wears an insulator with a teeth. It is a perspective view of 1st Embodiment of an insulating member. It is a perspective view of 2nd Embodiment of an insulating member. It is a figure which shows the state which attached the insulating member of 1st Embodiment using the insulator of 1st Embodiment. It is a figure which shows the state which attached the insulating member of 2nd Embodiment using the insulator of 1st Embodiment. It is the figure which looked at FIG. 11 from the XIII-XIII line. It is a perspective view of 2nd Embodiment of the stator of this invention. It is a figure which shows schematic structure of the stator core used with the stator of 2nd Embodiment. It is a perspective view of 2nd Embodiment of the insulator of this invention. It is the figure which looked at FIG. 16 from the direction of arrow XVII. It is sectional drawing which looked at FIG. 16 from the XVIII-XVIII line. It is the figure which looked at FIG. 16 from the direction of arrow XIX. It is the figure which looked at FIG. 16 from the direction of arrow XX. It is a figure which shows the state which attached the insulating member of 1st Embodiment using the insulator of 2nd Embodiment. It is a figure which shows the state which attached the insulating member of 2nd Embodiment using the insulator of 2nd Embodiment. It is the figure which looked at FIG. 21 from the XXIII-XXIII line. It is a figure explaining the method of fixing a stator winding | coil.

Embodiments of the present invention will be described below with reference to the drawings.
In this specification, the description of “axial direction” passes through the rotation center P of the rotor (see FIGS. 2 and 15) in a state where the rotor is disposed so as to be rotatable relative to the stator. The direction of the rotation center line O (see FIG. 1) is shown. The description of “circumferential direction” means that the center of rotation P is viewed in a cross section perpendicular to the axial direction (see FIGS. 2 and 15) in a state where the rotor is disposed so as to be rotatable relative to the stator. The circumferential direction centering on is shown. The description of “radial direction” indicates a direction passing through the rotation center P when viewed in a cross section perpendicular to the axial direction in a state where the rotor is disposed so as to be rotatable relative to the stator. The description “radially inner peripheral side” indicates the rotational center P side along the radial direction, and the description “radial outer peripheral side” indicates the side opposite to the rotational center P along the radial direction.
For insulators, the terms “axial direction”, “circumferential direction”, and “radial direction” refer to “axial direction”, “circumferential direction” when the insulator is attached to the teeth of the stator core. "And" radial direction ".

FIG. 1 shows a first embodiment 100 of a stator constituting the electric motor of the present invention. FIG. 1 is a perspective view of the stator 100 of the first embodiment.
The stator 100 includes a stator core 110, an insulator 200, and a stator winding 150 (not shown).

Stator core 110 has core end faces 110A and 110B on both axial sides. Further, the stator core 110 is configured as a stator core having a divided structure. In the present embodiment, the stator core 110 is composed of a first core member 120 and a second core member 130 as shown in FIG. FIG. 2 shows a view of the first core member 120 and the second core member 130 viewed from a direction perpendicular to the axial direction.
The first core member 120 (referred to as an “inner core”) is constituted by a laminated body in which a plurality of electromagnetic steel plates are laminated using caulking protrusions 127. The first core member 120 has a plurality of teeth 121 that extend along the radial direction and are spaced apart along the circumferential direction. The teeth 121 have a teeth base portion 122 extending along the radial direction and a teeth tip portion 123 provided on the radially inner peripheral side of the teeth base portion 122 and extending along the circumferential direction. Teeth tip portions 123 of teeth 121 adjacent in the circumferential direction are connected by a connecting portion 125.
The second core member 130 (referred to as an “outer core”) is configured by a laminate in which a plurality of electromagnetic steel plates are laminated using caulking protrusions 137. The second core member 130 has a yoke 131 extending along the circumferential direction. The yoke 131 has a yoke outer peripheral surface 132 and a yoke inner peripheral surface 133. And it has the recessed part formation surface 134a dented in the radial direction outer peripheral side from the yoke internal peripheral surface 133. As shown in FIG. The recess forming surface 134a forms a recess 134 into which the end of the tooth 121 (specifically, the tooth base 122) of the first core member 120 on the radially outer peripheral side can be fitted. The yoke inner peripheral surface 133 has yoke inner peripheral surface portions 133a and 133b formed between two concave portions 134 (recessed surface 134a) adjacent in the circumferential direction. The yoke inner peripheral surface portions 133a and 133b are formed so that the thickness of the yoke 131 is such that both the concave portion 134 is connected to the connecting portion between the yoke inner peripheral surface portion 133a and the concave portion 134 and the connecting portion between the yoke inner peripheral surface portion 133b and the concave portion 134. It inclines so that it may become thin toward the circumferential direction center.
The stator core 110 is press-fitted (or baked) with the end of the teeth base 122 of the first core member 120 opposite to the tooth tip 123 (radially outer peripheral side) into the recess 134 of the second core member 130. It is formed by fitting or cold fitting. That is, the stator core 110 includes a yoke 131 extending along the circumferential direction as viewed in a cross section perpendicular to the axial direction, and a plurality of teeth extending radially inward from the yoke 131 along the radial direction. The tooth 121 includes a tooth base 122 extending from the yoke 131 in the radial direction along the radial direction and a radial inner peripheral side of the teeth base 122, and extends along the circumferential direction. It has the tooth | gear front-end | tip part 123 which exists.
A tooth tip surface 124 is formed on the radially inner peripheral side of the tooth tip 123. A teeth insertion surface 124 forms a rotor insertion space into which a rotor (not shown) is inserted.
The electric motor of the present invention is configured by the stator 100 and the rotor that is rotatably inserted into the rotor insertion space.

  The stator winding 150 (see FIG. 24) is wound around an insulator attached to the tooth 121. That is, the stator winding 150 is wound around the teeth 121 by a concentrated winding method. As a method of winding the stator winding 150 around the tooth 121, a method of winding the stator winding 150 around the insulator in a state where the insulator is attached to the tooth 121, or a stator winding around the insulator. A method of attaching an insulator to the teeth 121 in a state where the wire 150 is wound can be used.

  1st Embodiment 200 of the insulator with which the teeth 121 are mounted | worn is described with reference to FIGS. FIG. 3 is a perspective view of the insulator 200 according to the first embodiment. 4 is a view of FIG. 3 viewed from the direction of arrow IV, FIG. 5 is a cross-sectional view of FIG. 3 viewed from the line VV, and FIG. 6 is a view of FIG. 3 viewed from the direction of arrow VI. FIG. 7 is a view of FIG. 3 viewed from the direction of arrow VII.

The insulator 200 is formed of a resin having insulating properties, for example, polybutylene terephthalate (PBT) resin, polyphenylene sulfide (PPS) resin, liquid crystal polymer (LCP) resin, nylon or the like (referred to as “resin bobbin”).
The insulator 200 has a first flange portion 210, a second flange portion 220, a body portion 230, and a through hole 270.
The first flange portion 210 extends along the axial direction (vertical direction in FIG. 4) and the circumferential direction (left-right direction in FIG. 4), and has an outer peripheral surface 210A on the radially outer peripheral side (upper side in FIG. 5). Inner circumferential surface 210B on the radially inner side (lower side in FIG. 5), end surface 211 on one axial side (upper side in FIG. 4), end surface 212 on the other axial side (lower side in FIG. 4), one circumferential side It has a side surface 213 on the side (right side in FIG. 4) and a side surface 214 on the other circumferential side (left side in FIG. 4).
The second flange portion 220 is arranged on the radially inner peripheral side from the first flange portion 210, extends along the axial direction and the circumferential direction, and has an outer peripheral surface 220A and a radial inner periphery on the radially outer peripheral side. It has an inner circumferential surface 220B on the side, an end surface 221 on one side in the axial direction, an end surface 222 on the other side in the axial direction, a side surface 223 on one side in the circumferential direction, and a side surface 224 on the other side in the circumferential direction.
The trunk portion 230 is provided between the first flange portion 210 and the second flange portion 220 and extends along the radial direction.
The through-hole 270 is formed in the body portion 230 and extends along the radial direction, and opens to the outer peripheral surface 210A of the first flange portion 210 and the inner peripheral surface 220B of the second flange portion 220.

The outer peripheral surface 210A, the inner peripheral surface 210B, the end surface 211, the end surface 212, the side surface 213, and the side surface 214 of the first flange 210 are the “first flange outer peripheral surface” and the “first flange inner periphery” of the present invention, respectively. It corresponds to “surface”, “first collar end surface”, “second collar end surface”, “first collar side surface”, and “second collar side surface”.
In addition, the outer peripheral surface 220A, the inner peripheral surface 220B, the end surface 221, the end surface 222, the side surface 223, and the side surface 224 of the second flange portion 220 are the “second flange outer peripheral surface” and “second flange” of the present invention, respectively. Corresponding to “part inner circumferential surface”, “third collar end surface”, “fourth collar end surface”, “third collar side surface”, and “fourth collar side surface”.
In this specification, for the sake of convenience, the upper side and the lower side in FIG. 4 will be described as “one axial side” and “the other axial side”, and the right and left sides in FIG. Although described as “the other side in the circumferential direction”, “one” and “the other” may be reversed.

The through hole 270 is formed by inner wall surfaces 271 to 274. In the present embodiment, as shown in FIG. 8, when the end portion of the teeth base portion 122 is inserted into the through hole 270 from the second flange portion 220 side, the outer wall surfaces 122a, 122b of the teeth base portion 122, 122c and outer wall surface 122d are inserted so as to face inner wall surfaces 271, 272, 273, and 274 of through-hole 270, respectively.
The inner wall surfaces 271, 272, 273, and 274 of the through hole 270 have inclined surfaces 271a, 272a, 273a, and 274a on the inner peripheral surface 220B side of the second flange portion 220. Accordingly, it is possible to easily insert the teeth base 122 (the teeth 121) into the through hole 270 of the insulator 200 while preventing the axial and circumferential shifts of the insulator 200 with respect to the teeth base 122 (the teeth 121). it can.

  The first flange portion 210 is provided with protrusions 240, 250, and 260 that protrude from the outer peripheral surface 210A to the radially outer peripheral side.

The protrusion 240 is provided in a region on the side surface 213 side (one circumferential direction side) on the end surface 211 side (one axial direction side) from the through hole 270.
The protrusion 240 includes an outer wall surface 241 formed on the outer peripheral side in the radial direction, an outer wall surface 242 formed on the other axial side, and an outer wall surface 243 formed on the other circumferential side (side facing the protrusion 250). Have. Note that the outer wall surface on one side in the axial direction of the protrusion 240 is formed by the end surface 211 of the first flange portion 210 (on the same plane as the end surface 211), and the outer wall surface on one side in the circumferential direction is the first wall surface. It is formed by the side surface 213 of the portion 210 (equal to the side surface 213).
Further, the protrusion 240 has a notch 244 in which a region on the end face 212 side is notched on the side surface 213 side. The notch surfaces (outer wall surfaces) forming the notch portions 244 are used as wall surfaces 282 and 284 of the recess 280 described later.
Further, the protrusion 240 is open to the end surface 211 and the inner peripheral surface 210B of the first flange 210 and the outer wall surface 241 of the protrusion 240 (that is, the end surface 211 side is open and the inner peripheral surface 210B and the inner peripheral surface 210B are in communication with each other), and has a groove 245 extending from the end surface 211 to the other axial direction along the axial direction. The groove 245 is formed by inner wall surfaces 245a to 245e. The inner wall surfaces 245d and 245e connected to the end surface 211 are formed as inclined surfaces that are inclined so that the width of the groove 245 along the circumferential direction gradually decreases from the end surface 211 side. The depth of the groove 245 and the width along the circumferential direction are set so that an end portion of a stator winding 150 and a string 160 that fixes an end portion of the stator winding 150 to be described later can be passed.
Further, the protrusion 240 has a locking protrusion 246 that protrudes from the outer wall surface 241 to the outer peripheral side in the radial direction at a position on the side surface 213 side on the end surface 211 side. The locking projection 246 has a locking surface 246a on the other side in the axial direction. In the present embodiment, the outer wall surface on one side in the axial direction of the locking projection 246 is formed by the end surface 211 of the first flange 210 (equal to the end surface 211), and the outer wall surface on one side in the circumferential direction is It is formed by the side surface 213 of the first flange 210 (equal to the side surface 213).
As will be described later, the end of the stator winding 150 is fixed using the groove 245 and the locking projection 246.
The protrusion 240 corresponds to the “first protrusion” of the present invention.

The protrusion 250 is provided in a region on the side surface 214 side on the end surface 211 side from the through hole 270.
The protrusion 250 includes an outer wall surface 251 formed on the outer peripheral side in the radial direction, an outer wall surface 252 formed on the other axial side, and an outer wall surface 253 formed on one side in the circumferential direction (side facing the protrusion 240). Have. The outer wall surface on one side in the axial direction of the protrusion 250 is formed by the end surface 211 of the first flange portion 210 (coplanar with the end surface 211), and the outer wall surface on the other circumferential side is the first flange surface. It is formed by the side surface 214 of the portion 210 (equal to the side surface 214).
Further, the protrusion 250 has a notch 254 in which a region on the end face 212 side (the other side in the axial direction) is notched on the side surface 214 side. The notch surfaces (outer wall surfaces) forming the notch portions 254 are used as wall surfaces 292 and 294 of the recesses 290 described later.
Further, the protrusion 250 has a notch portion 255 on the end surface 211 side, in which a region on the side surface 214 side is notched. The notch 255 is formed by a notch surface 255a extending from the end surface 211 to the other axial side along the axial direction, and a notch surface 255b extending from the side surface 214 to the circumferential one side along the circumferential direction. Is done.
Using the notch 255, the end of the stator winding 150 is fixed as will be described later.
The protrusion 250 corresponds to the “second protrusion” of the present invention.

The protrusion 260 is provided on the end face 212 side with respect to the through hole 270.
The protrusion 260 has an outer wall surface 261 on the end surface 212 side, and has an outer wall surface 262 on the through-hole 270 side (one side in the axial direction). The outer wall surface 261 is inserted into the through hole 270 of the insulator 200, and the end portion of the tooth base 122 protruding from the through hole 270 (from the outer peripheral surface 210 </ b> A of the first flange 210) is used as the second core member 130. When press-fitting into the recess 134, the end of the teeth base 122 is guided into the recess 134. In the present embodiment, the outer wall surface 261 is formed as an inclined surface whose distance from the outer peripheral surface 210A increases from the end surface 212 side toward the through hole 270 side (one axial direction side).
The protrusion 260 corresponds to the “guide protrusion” of the present invention, and the outer wall surface 261 of the protrusion 260 corresponds to the “guide surface” of the present invention.

Further, the first flange portion 210 is provided with recesses 280 and 290 that are recessed from the outer peripheral surface 210A toward the radially inner peripheral side.
The recess 280 is provided on the side surface 213 side (one side in the circumferential direction) with respect to the through hole 270, and is formed by a bottom surface 281, wall surfaces 282, 283, and 284.
The bottom surface 281 extends along the axial direction and the circumferential direction.
The wall surface 282 is connected to the end portion 281a of the bottom surface 281 on the end surface 211 side (one axial direction side), and extends along the radial direction (radial outer peripheral side) and the circumferential direction.
The wall surface 283 is connected to an end portion 281b of the bottom surface 281 on the end surface 212 side (the other side in the axial direction), and extends along the radial direction (radial outer peripheral side) and the circumferential direction.
The wall surface 284 is connected to the end portion 281c of the bottom surface 281 on the through-hole 270 side (the other circumferential side), and extends in the radial direction (radial outer circumferential side) and the axial direction.
In the present embodiment, the wall surface 282 and a part of the wall surface 284 of the recess 280 are formed by a notch surface (outer wall surface) that forms the notch portion 244 of the protrusion 240. For this reason, a part of the wall surface 282 and the wall surface 284 forming the recess 280 protrudes from the outer peripheral surface 210 </ b> A of the first flange portion 210 to the outer peripheral side in the radial direction.
The recess 290 is provided on the side surface 214 side (the other side in the circumferential direction) with respect to the through hole 270, and is formed by a bottom surface 291, wall surfaces 292, 293, and 294.
The bottom surface 291 extends along the axial direction and the circumferential direction.
The wall surface 292 is connected to the end portion 291a of the bottom surface 291 on the end surface 211 side (one axial direction side), and extends along the radial direction (radial outer peripheral side) and the circumferential direction.
The wall surface 293 is connected to an end portion 291b of the bottom surface 291 on the end surface 212 side (the other side in the axial direction), and extends along the radial direction (radial outer peripheral side) and the circumferential direction.
The wall surface 294 is connected to the end portion 291c of the bottom surface 291 on the through hole 270 side (one circumferential direction side), and extends along the radial direction (radial outer circumferential side) and the axial direction.
In the present embodiment, the wall surface 292 and a part of the wall surface 294 of the recess 290 are formed by a notch surface (outer wall surface) that forms the notch portion 254 of the protrusion 250. For this reason, the wall surface 292 and a part of the wall surface 294 forming the recess 290 protrude from the outer peripheral surface 210 </ b> A of the first flange portion 210 to the outer peripheral side in the radial direction.

In the present embodiment, the bottom surface 281, the wall surfaces 282 to 284, the bottom surface 291, and the wall surfaces 292 to 294 are formed as flat surfaces (including “substantially flat surfaces”). Of course, it can be formed in various shapes other than a flat surface.
The wall surfaces 282, 283, 292, and 293 extend in parallel to the radial direction and the circumferential direction (including “substantially parallel”), and the wall surfaces 284 and 294 are parallel to the radial direction and the axial direction (“substantially parallel”). (Including). Of course, it can also be formed to extend in a direction inclined with respect to the radial direction, the circumferential direction, and the axial direction.
The wall surfaces 282 to 284 (292 to 294) are formed so as to extend in a direction perpendicular to the bottom surface 281 (291) (including "substantially right angle"). Of course, it can also be formed to extend in a direction inclined with respect to a direction perpendicular to the bottom surface 281 (291).
The concave portion 280 corresponds to the “first concave portion” of the present invention, and the concave portion 290 corresponds to the “second concave portion” of the present invention.

Next, an operation of assembling the first core member 120 and the second core member 130 will be described.
First, the insulator 200 is attached to the teeth 121 (the teeth base portion 122) of the first core member 120. In the present embodiment, as shown in FIG. 8, the end of the tooth base 122 of the tooth 121 is inserted into the through hole 270 of the insulator 200 from the second flange 220 side. At this time, the end portion of the teeth base 122 is guided into the through hole 270 by the inclined surfaces 271 a to 274 a on the radially inner peripheral side of the inner wall surfaces 271 to 274 forming the through hole 270. The teeth base 122 is inserted so that the end of the teeth base 122 protrudes from the outer peripheral surface 210 </ b> A of the first flange 210.
Then, the stator winding 150 is wound with the insulator 200 mounted on the teeth 121 of the first core member 120. In the present embodiment, the stator winding 150 is wound around the space formed by the first flange portion 210, the second flange portion 220, and the trunk portion 230 of the insulator 200.
Regarding the mounting of the insulator 200 and the winding of the stator winding 150, a method of mounting the insulator 200 on the teeth 121 of the first core member 120 in a state where the stator winding 150 is wound around the insulator 200. Can also be used.

The first core member 120 and the second core member 130 are assembled in a state where the insulator 200 is attached to the tooth 121 and the stator winding 150 is wound around the insulator 200. In the present embodiment, the end portion of the teeth base portion 122 that is inserted into the through hole 270 of the insulator 200 and protrudes from the outer peripheral surface 210 </ b> A of the first flange portion 210 is formed in the yoke 131 of the second core member 130. The first core member 120 and the second core member 130 are assembled by press-fitting into the recessed portion 134 formed.
In the present embodiment, when the end portion of the tooth base 122 inserted into the through hole 270 of the insulator 200 is press-fitted into the recess 134 of the second core member 130 while being moved along the axial direction, the through hole 270 The end of the teeth base 122 is guided into the recess 134 by the outer wall surface 261 of the protrusion 260 formed on the end surface 212 side (the other side in the axial direction). As a result, the first core member 120 or the insulator 200 and the second core member 130 can be prevented from contacting with a strong force, and the first core member 120 and the second core member 130 are deformed. Alternatively, the occurrence of cracks in the insulator 200 can be prevented.
Further, as a method of press-fitting the end portion of the teeth base portion 122 into the concave portion 134 of the second core member 130, the teeth base portion 122 protruding from the outer peripheral surface 210A of the first flange portion 210 using a press-fitting jig, A method of applying a force for moving the end portion of the teeth base portion 122 in the direction of inserting the recess portion into the wall surface 122a on one axial side can be used.
At this time, if the end of the teeth base 122 swells in the circumferential direction and the radial direction due to the force applied by the press-fitting jig, the press-fitting operation becomes difficult. For this reason, it is necessary to apply force to an appropriate portion of the end portion of the teeth base 122 using a press-fitting jig having an appropriate size. In the present embodiment, protrusions 240 and 250 are provided on the first flange 210 on the end surface 211 side from the through hole 270, and the outer wall surface 243 of the protrusion 240 and the outside of the protrusion 250 are opposed to each other. The wall surface 253 forms a movement path for the press-fitting jig. Accordingly, the end portion of the teeth base portion 122 can be press-fitted into the concave portion 134 of the second core member 130 while preventing the end portion of the teeth base portion 122 from being deformed.
The outer wall surface 243 of the protrusion 240 corresponds to the “path forming surface of the first protrusion” of the present invention, and the outer wall surface 253 of the protrusion 250 is the “path forming surface of the second protrusion” of the present invention. Accordingly, the outer wall surface 243 of the protrusion 240 and the outer wall surface 253 of the protrusion 250 form the “movement path of the press-fitting jig” of the present invention.

Next, an insulating member that insulates the stator winding 150 wound around the insulator 200 and the yoke 131 will be described. The insulating member is disposed between the insulator 200 and the yoke 131. The insulating member is preferably made of an insulating film formed of a resin having insulating properties, for example, a polyethylene terephthalate resin or a polyethylene naphthalate resin.
The insulating member only needs to be arranged so as to be able to insulate between the stator winding 150 wound around the insulator 200 and the yoke 131, and all of the insulating members are the insulator 200 and the yoke 131. It may not be arranged between. That is, at least a part of the insulating member only needs to be disposed between the insulator 200 and the yoke 131.

A first embodiment 10 of an insulating member will be described with reference to FIG.
The insulating member 10 of the first embodiment is formed by bending a rectangular insulating film having edges 10a to 10d, and has a V-shaped cross section. That is, the rectangular insulating film is divided into an edge portion 11 including the edge portion 10a, an edge portion 14 including the edge portion 10b, and central portions 12 and 13 between the edge portions 11 and 14, and the edge portion 11 and the central portion 12 are separated. A fold line 10A between the center portions 12 and 13, a fold line 10B between the center portions 12 and 13, and a fold line 10C between the center portion 13 and the edge portion 14 are perpendicular to the extending direction of the edges 10a and 10b. It is bent so as to have a V shape when viewed from any direction.
The insulating member 10 is inserted between the insulator 200 and the yoke 131 in a state where the first core member 120 and the second core member 130 are assembled. At this time, the insulating member 10 is inserted between the insulator 200 and the yoke 131 so that the edge portions 10a and 10b are arranged on one side in the circumferential direction and the other side in the circumferential direction.
In the present embodiment, the insulator 200 is in a state where the insulating member 10 is elastically deformed by applying a force so that the distance between the edge portion 10a (edge portion 11) and the edge portion 10b (edge portion 14) is shortened. The first flange 210 is inserted between the insulator 200 and the yoke 131 from the end face 212 side (the other side in the axial direction), that is, from the side where the protrusions 240 and 250 are not provided. In the present embodiment, the insulator 200 is inserted through a gap between the outer peripheral surface 210A of the first flange 210 and the yoke inner peripheral surface portions 333a and 333b of the yoke 131.
When the insertion of the insulating member 10 is completed, the force applied to the insulating member 10 is released. Thereby, the insulating member 10 is elastically restored, and the edges 10a and 10b of the insulating member 10 are disposed in the recesses 280 and 290 formed in the first flange 210 of the insulator 200.
Here, in the present embodiment, the wall surface 282 and a part of the wall surface 284 of the recess 280 are formed by the cut-out surface (outer wall surface) of the protrusion 240, and therefore from the outer peripheral surface 210 </ b> A of the first flange portion 210. It protrudes outward in the radial direction. Similarly, part of the wall surface 292 and the wall surface 294 of the recess 290 is formed by the notch surface (outer wall surface) of the protrusion 250, so that the outer peripheral surface 210 </ b> A of the first flange 210 is radially outward. It's popping out. For this reason, the insulating member 10 inserted through the gap between the insulator 200 and the yoke 131 comes into contact with the wall surface 282 of the recess 280 or the wall surface 292 of the recess 290 protruding from the outer peripheral surface 210A. It is possible to easily determine the completion of insertion. In addition, it is ensured that the edges 10a and 10b of the insulating member 10 move to the through hole 270 side by a part of the wall surface 284 of the recess 280 and a part of the wall surface 294 of the recess 290 protruding from the outer peripheral surface 210A. Can be prevented.

The edge 10a of the insulating member 10 corresponds to the “first edge on one side in the circumferential direction” of the present invention, and the edge 10b corresponds to the “second edge on the other side in the circumferential direction” of the present invention. The edge portion 11 corresponds to the “first edge portion including the first edge portion” of the present invention, the center portion 12 corresponds to the “first center portion” of the present invention, and the center portion 13. Corresponds to the “second central portion” of the present invention, and the edge portion 14 corresponds to the “second edge portion including the second edge portion” of the present invention.
The edge 10b may be “a first edge on one side in the circumferential direction”, and the edge 10a may be “a second edge on the other side in the circumferential direction”.

FIG. 11 shows a state in which the insulating member 10 of the first embodiment is disposed between the insulator 200 and the yoke 131. In addition, the figure which looked at FIG. 11 from the XIII-XIII line is shown by FIG.
The edge 10a (edge on one side in the circumferential direction) of the insulating member 10 has two insulators 200 adjacent to each other in the circumferential direction (specifically, two insulators mounted on each of the two teeth 121 adjacent in the circumferential direction). 200) is disposed in the concave portion 290 (the concave portion on the other side in the circumferential direction) of the insulator 200 on one side (the one side in the circumferential direction). At this time, at least a part of the edge portion 11 including the edge portion 10 a is also disposed in the recess 290. By disposing the edge 10a in the recess 290, the wall surfaces 292 and 293 of the recess 290 restrict the movement of the edge 10a in the axial direction (movement toward one side in the axial direction and movement toward the other side in the axial direction). The movement of the edge 10a toward the through hole 270 (movement toward the one side in the circumferential direction) is restricted by the wall surface 294 of the recess 290.
Further, the edge 10b (the edge on the other side in the circumferential direction) of the insulating member 10 is disposed in the recess 280 (the recess on the one side in the circumferential direction) of the other (the other in the circumferential direction) insulator 200. At this time, at least a part of the edge portion 14 including the edge portion 10 b is also disposed in the recess 280. By disposing the edge portion 10b in the recess 280, the wall surfaces 282 and 283 of the recess 280 restrict the movement of the edge portion 10b in the axial direction (movement toward one side in the axial direction and movement toward the other side in the axial direction). The movement of the edge 10b toward the through hole 270 (movement toward the other side in the circumferential direction) is restricted by the wall surface 284 of the recess 280. Thereby, the elastic member 10 can be hold | maintained reliably.
Further, the central portions 12 and 13 of the insulating member 10 extend along the radial direction between one (circumferential one side) insulator 200 and the other (circumferential other side) insulator. Be placed. In the present embodiment, the central portions 12 and 13 of the insulating member 10 are disposed between the stator windings 150 of different phases wound around the one insulator 200 and the other insulator 200, respectively. As a result, the insulating member 10 has a function of insulating the stator winding 150 wound around the insulator 200 and the yoke 131 and a function of an interphase insulating member for insulating the stator windings of different phases. Therefore, it is not necessary to separately provide an interphase insulating member.

A second embodiment 20 of the insulating member will be described with reference to FIG.
The insulating member 20 of the second embodiment is formed of a rectangular insulating film having edges 20a to 20d. The insulating member 20 is inserted between the insulator 200 and the yoke 131 so that the edges 20a and 20b are arranged on one side in the circumferential direction and the other side in the circumferential direction.
The insulating member 20 is inserted between the insulator 200 and the yoke 131 in a state where the first core member 120 and the second core member 130 are assembled.
The edge 20a of the insulating member 20 corresponds to the “first edge on one side in the circumferential direction” of the present invention, and the edge 20b corresponds to the “second edge on the other side in the circumferential direction” of the present invention. To do.
The edge 20b may be “a first edge on one side in the circumferential direction”, and the edge 20a may be “a second edge on the other side in the circumferential direction”.

FIG. 12 shows a state in which the insulating member 20 according to the second embodiment is disposed between the insulator 200 and the yoke 131.
An edge 20a (one edge in the circumferential direction) of the insulating member 20 is a recess 290 (one other in the circumferential direction) of one insulator (one in the circumferential direction) of two insulators 200 adjacent in the circumferential direction. In the concave portion). At this time, the edge portion including the edge portion 20 a is also disposed in the recess 290. Accordingly, the movement of the edge 20a in the axial direction is restricted by the wall surfaces 292 and 293 of the recess 290, and the movement of the edge 20a toward the through hole 270 is restricted by the wall surface 294 of the recess 290.
Further, the edge 20b (the edge on the other side in the circumferential direction) of the insulating member 20 is disposed in the recess 280 (the recess on the one side in the circumferential direction) of the other (the other in the circumferential direction) insulator 200. At this time, the edge portion including the edge portion 20b is also disposed in the recess 280. Accordingly, the movement of the edge 20b in the axial direction is restricted by the wall surfaces 282 and 283 of the recess 280, and the movement of the edge 20b toward the through hole 270 is restricted by the wall surface 284 of the recess 280.
The operation of inserting the insulating member 20 between the insulator 200 and the yoke 131 is the same as the operation of inserting the insulating member 10 described above. In addition, since the insulating member 20 of this embodiment is not bent like the insulating member 10 of 1st Embodiment, it does not have a function of an interphase insulating member.

In the insulator 200 of the first embodiment, the edge portions 10a, 20a and 10b, 20b on both sides in the circumferential direction of the insulating members 10, 20 are recessed portions 290 formed in the first flange portion 210 of the insulator 200, and 280. Thus, the axial movement of the edges 10a, 20a and 10b, 20b on both sides in the circumferential direction of the insulating members 10, 20 and the movement toward the through hole 270 along the circumferential direction are restricted by the wall surfaces of the recesses 280 and 290. can do.
Therefore, the insulating members 10 and 20 can be reliably held.
Moreover, since it is only necessary to change the configuration of the insulator, the insulator, the stator, and the electric motor that can regulate the movement of the insulating member can be easily configured.

The insulator 200 of the first embodiment is not limited to the configuration described above, and various changes, additions, and deletions are possible.
Protrusions 240 and 250 projecting radially outward from the outer peripheral surface 210A of the first flange 210 are provided, and the wall surface 282 and a part of the wall surface 284 of the recess 280 are formed by the outer wall surface of the protrusion 240, and the recess By forming the wall surface 292 and part of the wall surface 294 of the 290 with the outer wall surface of the projection 250, the wall surface 282 and part of the wall surface 284 of the recess 280 and the wall surface 292 and part of the wall surface 294 of the recess 290 are However, one or both of the projecting portions 240 and 250 can be omitted from the outer peripheral surface 210A of the flange portion 210. In this case, the wall surfaces 282 to 284 of the recess 280 are formed between the end of the bottom surface 281 and the outer peripheral surface 210A, and the wall surfaces 292 to 294 of the recess 290 are formed between the bottom surface 291 and the outer peripheral surface 210A. .
The bottom surface 281 and the wall surfaces 282 to 284 of the recess 280 and the bottom surface 291 and the wall surfaces 292 to 294 of the recess 290 are preferably formed on a flat surface (including a “substantially flat surface”), but are not limited to a flat surface. The wall surfaces 282 to 234 of the recess 280 (the wall surfaces 292 to 294 of the recess 290) are preferably formed to extend in a direction perpendicular to the bottom surface 281 (bottom surface 291) (including "substantially right angle"). However, it may be formed so as to extend in a direction inclined with respect to a direction perpendicular to the bottom surface 281 (bottom surface 291).
The protrusion 260 can be omitted.
The shapes of the inner wall surfaces 271 to 274 of the through hole 270 can be changed as appropriate.
As the insulating member, various shapes of insulating members can be used.

Next, a second embodiment 300 of the stator constituting the electric motor of the present invention will be described with reference to FIG. FIG. 14 is a perspective view of the stator 300 according to the second embodiment. In the stator 100 of the first embodiment, the insulator 200 is provided with the recesses 280 and 290 for restricting the movement of the insulating member along the circumferential direction and the axial direction. However, in the stator 300 of the second embodiment, The groove of the stator core is provided with a groove in which the insulating member can move along the axial direction, and the insulator is provided with a protrusion that restricts the movement of the insulating member along the axial direction.
The stator 300 according to the present embodiment includes a stator core 310, an insulator 400, and a stator winding (not shown), like the stator 100 according to the first embodiment.

Stator core 310 has core end faces 310A and 310B on both axial sides. The stator core 310 is configured as a stator core having a divided structure. In the present embodiment, the stator core 310 includes a first core member 320 having teeth 321 and a second core member 330 having yokes 331, as shown in FIG.
As with the first core member 120 of the first embodiment, the first core member 320 includes a plurality of teeth 321 having a tooth base portion 322, a tooth tip portion 323, and a tooth tip surface 324 connected by a connecting portion 325. In this state, a plurality are provided along the circumferential direction.
Similarly to the second core member 130 of the first embodiment, the second core member 330 has a yoke 331 having a yoke outer peripheral surface 332 and a yoke inner peripheral surface 333 extending in the circumferential direction. Moreover, it has the recessed part formation surface 334a which forms the recessed part 334 by which the front-end | tip part of the teeth base part 322 of the 1st core member 320 is press-fit. The yoke inner peripheral surface 333 has yoke inner peripheral surface portions 333a and 333b formed between two concave portions 334 (recess forming surfaces 334a) adjacent in the circumferential direction. The yoke inner peripheral surface portions 333a and 333b are inclined in the same manner as the yoke inner peripheral surface portions 133a and 133b of the first embodiment.
In the present embodiment, the yoke 331 is formed with a groove forming surface that is recessed from the yoke inner peripheral surface 333 to the radially outer peripheral side. The groove forming surface has groove forming surface portions 335a and 335b that are recessed radially outward from the yoke inner peripheral surface portions 333a and 333b, respectively. The groove forming surfaces (groove forming surface portions 335a and 335b) form grooves 335 that are recessed from the yoke inner peripheral surface 333 to the outer peripheral side in the radial direction and open to the core end surfaces 310A and 310B. The groove 335 (groove forming surface) is formed between two recesses 334 adjacent in the circumferential direction (between two teeth 321 adjacent in the circumferential direction).
The groove 335 has a region (region on the other side in the circumferential direction) formed by the groove forming surface portion 335a and a region (region on one side in the circumferential direction) formed by the groove forming surface portion 335b. An edge on one circumferential side and an edge on the other circumferential side of the insulating member are disposed in the same groove 335. For example, the edge on one side in the circumferential direction is arranged in a region formed by the groove forming surface portion 335b in the groove 335, and the edge on the other side in the circumferential direction is arranged in a region formed by the groove forming surface portion 335a. Be placed.

A second embodiment 400 of the insulator attached to the teeth 321 will be described with reference to FIGS. FIG. 16 is a perspective view of an insulator 400 according to the second embodiment. 17 is a view of FIG. 16 viewed from the direction of arrow XVII, FIG. 18 is a cross-sectional view of FIG. 16 viewed from the line XVIII-XVIII, and FIG. 19 is a view of FIG. 16 viewed from the direction of arrow XIX. FIG. 20 is a view of FIG. 16 viewed from the direction of arrow XX.
The insulator 400 includes a first flange portion 410, a second flange portion 420, a body portion 430, and a through hole 470, similarly to the insulator 200 of the first embodiment.
In the insulator 400 of this embodiment, the recesses 280 and 290 of the insulator 200 of the first embodiment are omitted, and protrusions 480 and 490 are provided instead. That is, except for the protrusions 440, 450, 480, and 490, the configuration is the same as that of the insulator 200 of the first embodiment. Therefore, only the protrusions 440, 450, 480, and 490 will be described below.
In the present embodiment, the outer peripheral surface 410A, the inner peripheral surface 410B, the end surface 411, the end surface 412, the side surface 413, and the side surface 414 of the first flange portion 410 are respectively referred to as the “first flange outer peripheral surface”, “ It corresponds to “1st collar inner peripheral surface”, “first collar end surface”, “second collar end surface”, “first collar side surface”, and “second collar side surface”.
In addition, the outer peripheral surface 420A, the inner peripheral surface 420B, the end surface 421, the end surface 422, the side surface 423, and the side surface 424 of the second flange portion 420 are the “second flange outer peripheral surface” and “second flange” of the present invention, respectively. Corresponding to “part inner circumferential surface”, “third collar end surface”, “fourth collar end surface”, “third collar side surface”, and “fourth collar side surface”.

The first flange portion 410 is provided with protrusions 440, 450, 460, 480, and 490 that protrude from the outer peripheral surface 410A to the outer peripheral side in the radial direction.
The protrusion 440 is provided in a region on the side surface 413 side on the end surface 411 side from the through hole 470. The protruding portion 440 includes an outer wall surface 441 formed on the radially outer peripheral side, an outer wall surface 442 formed on the other axial side, and an outer wall surface 443 formed on the other circumferential side (side facing the protruding portion 450). Have. Note that the outer wall surface on one side in the axial direction of the protrusion 440 is formed by the end surface 411 of the first flange portion 410, and the outer wall surface on one side in the circumferential direction is formed by the side surface 413 of the first flange portion 410. ing.
The protrusion 440 has a notch 444, a groove 445, and a locking protrusion 446, similar to the protrusion 240 of the first embodiment. Since the groove 445 and the locking projection 446 have the same configuration as the groove 245 and the locking projection 246 of the first embodiment, description thereof is omitted.
The notch 444 is formed by a notch surface 444 a extending along the axial direction from the outer wall surface 442 and a notch surface 444 b extending along the circumferential direction from the side surface 413. In the present embodiment, the notch surfaces 444a and 444b are provided to restrict the movement of the insulating member. Details will be described later.

The protrusion 450 is provided in a region on the side surface 414 side on the side of the end surface 411 from the through hole 470. The protrusion 450 includes an outer wall surface 451 formed on the outer peripheral side in the radial direction, an outer wall surface 452 formed on the other axial side, and an outer wall surface 453 formed on one side in the circumferential direction (side facing the protrusion 440). Have. Note that the outer wall surface on one axial side of the protrusion 450 is formed by the end surface 411 of the first flange portion 410, and the outer wall surface on the other circumferential side is formed by the side surface 414 of the first flange portion 410. ing.
The protrusion 450 has the notch part 454 and the notch part 455 like the protrusion 250 of 1st Embodiment. Since the notch 455 has the same configuration as the notch 255 of the first embodiment, the description thereof is omitted.
The notch 454 is formed by a notch surface 454a extending from the outer wall surface 452 along the axial direction and a notch surface 454b extending from the side surface 414 along the circumferential direction. In the present embodiment, the notch surfaces 454a and 454b are provided to restrict the movement of the insulating member. Details will be described later.

The protrusion 480 is provided at a position on the side surface 413 side on the end surface 412 side with respect to the through hole 470. Further, the protrusion 480 is provided so as to extend along the circumferential direction at a location facing the protrusion 440 (specifically, the cut surface 444b of the protrusion 440) along the axial direction. The protruding portion 480 has an outer wall surface 480a extending along the radially outer peripheral side and the circumferential direction on the side facing the protruding portion 440 (notch surface 444b). The edge of the insulating member disposed between the protrusion 440 (notch surface 444b) and the protrusion 480 (outer wall surface 480a) by the notch surface 444b of the protrusion 440 and the outer wall surface 480a of the protrusion 480. Is restricted from moving along the axial direction. Note that the cutout surface 444a of the protrusion 440 restricts the movement of the edge of the insulating member toward the through hole 470 (the other side in the circumferential direction).
The protrusion 490 is provided on the side surface 414 side on the end surface 412 side with respect to the through hole 470. Further, the protrusion 490 is provided so as to extend along the circumferential direction at a location facing the protrusion 450 (specifically, the cutout surface 454b of the protrusion 450) along the axial direction. The protrusion 490 has an outer wall surface 490a extending along the outer peripheral side in the radial direction and the peripheral direction on the side facing the protrusion 450 (notch surface 454b). An edge portion of the insulating member disposed between the protrusion 450 (notch surface 454b) and the protrusion 490 (outer wall surface 490a) by the notch surface 454b of the protrusion 450 and the outer wall surface 490a of the protrusion 490. Is restricted from moving along the axial direction. Note that the notch surface 454a of the protrusion 450 restricts the edge of the insulating member from moving toward the through hole 470 (one side in the circumferential direction).
Preferably, the heights of the notch surface 444b of the protrusion 440 and the notch surface 454b of the protrusion 450 from the outer peripheral surface 410A of the first flange 410 are such that the outer wall surface 480a and the protrusion 490 of the protrusion 480 are the same. The outer wall surface 490a is set larger than the height from the outer peripheral surface 410A.

  In the present embodiment, the protrusion 440 corresponds to the “first protrusion” of the present invention, and the notch surface 444b of the protrusion 440 corresponds to the “first restricting surface of the protrusion” of the present invention. The projecting portion 450 corresponds to the “second projecting portion” of the present invention, and the notch surface 454b of the projecting portion 450 corresponds to the “regulating surface of the second projecting portion” of the present invention. The protrusion 480 corresponds to the “third protrusion” of the present invention, the outer wall surface 480a of the protrusion 480 corresponds to the “regulatory surface of the third protrusion” of the present invention, and the protrusion 490. Corresponds to the “fourth protrusion” of the present invention, and the outer wall surface 490a of the protrusion 490 corresponds to the “restricting surface of the fourth protrusion” of the present invention.

The operation of assembling the first core member 320 and the second core member 330 is the same as the operation of assembling the first core member 120 and the second core member 130 in the stator 100 of the first embodiment. That is, the end of the tooth base 322 of the first core member 320 is inserted into the through hole 470 of the insulator 400 and protrudes from the outer peripheral surface 410A of the first flange 410 of the insulator 400. The portion is press-fitted into a recess 334 formed in the yoke 331 of the second core member 330.
At this time, the notch surface 444b of the protrusion 440 of the insulator 400 attached to the tooth 321 of the first core member 320 and the outer wall surface 480a of the protrusion 480 are inserted between the insulator 400 and the yoke 331. A region where an edge on one side in the circumferential direction of the insulating member is disposed, for example, a region of the groove 335 facing a region formed by the groove forming surface portion 335b, and a notch surface 454b of the protrusion 450; The outer wall surface 490a of the protrusion 490 is arranged at a position corresponding to a region where the edge on the other circumferential side of the insulating member is arranged, for example, a region of the groove 335 formed by the groove forming surface portion 335a. It is configured. In other words, the axial movement of the edge on one side in the circumferential direction and the edge on the other side in the circumferential direction of the insulating member disposed in the groove 335 opened on the core end faces on both sides in the axial direction is configured to be restricted. .

FIG. 21 shows a state where the insulating member 10 of the first embodiment is disposed between the insulator 400 and the yoke 331. Note that FIG. 23 shows a view of FIG. 21 taken along line XXIII-XXIII.
The edge 10 a (edge on one side in the circumferential direction) and the edge 10 b (edge on the other side in the circumferential direction) of the insulating member 10 are one in the circumferential direction of the same groove 335 formed in the yoke 331 of the stator core 300. Are disposed in a region on the side (region formed by the groove forming surface portion 335b) and a region on the other circumferential side (region formed by the groove forming surface portion 335a). Since the groove 335 is opened in the core end faces 310A and 310B on both sides in the axial direction, the edges 10a and 10b of the insulating member 10 are movable in the axial direction.
At this time, the notch surface 454b of the protrusion 450 of the insulator 400 and the outer wall surface 490a of the protrusion 490 attached to the tooth 321 on one side in the circumferential direction with respect to the groove 335 are the insulation inserted in the groove 335. The member 10 is disposed at a position corresponding to the edge 10a on one side in the circumferential direction, that is, a position corresponding to a region formed by the groove forming surface portion 335b. Thereby, the axial movement of the edge portion 10a on one side in the circumferential direction of the insulating member 10 is described by the notch surface 454b of the protrusion 450 of the insulator 400 and the outer wall surface 490a of the protrusion 490. In addition, the notch surface 454a of the protrusion 450 of the insulator 400 restricts the movement of the edge 10a on one side in the circumferential direction of the insulating member 10 toward the through hole 470.
Further, the notch surface 444b of the protrusion 440 and the outer wall surface 480a of the protrusion 480 of the insulator 400 attached to the tooth 321 on the other circumferential side with respect to the groove 335 are insulating members inserted into the groove 335. 10 in the position corresponding to the edge 10b on the other circumferential side, that is, the position corresponding to the region formed by the groove forming surface portion 335a. Thereby, the axial movement of the edge 10b on the other circumferential side of the insulating member 10 is described by the notch surface 444b of the protrusion 440 of the insulator 400 and the outer wall surface 480a of the protrusion 480. Note that the notched surface 444a of the protrusion 440 of the insulator 400 restricts the movement of the edge 10b on the other circumferential side of the insulating member 10 toward the through hole 470.
The central portions 12 and 13 of the insulating member 10 are disposed so as to extend along the radial direction between the insulators 400 attached to the teeth 321 on both sides in the circumferential direction with respect to the groove 335, and have different phases. The stator winding 150 is insulated.

A state in which the insulating member 20 of the second embodiment is disposed between the insulator 400 and the yoke 331 is shown in FIG.
The operation of disposing the insulating member 20 of the second embodiment between the insulator 400 and the yoke 331 is the same as the operation of disposing the central portions 12 and 13 of the insulating member 10 of the first embodiment. Since the operation is the same as the operation of disposing the insulating member 10 between the insulator 400 and the yoke 331, the description thereof will be omitted.

In the insulator 400 of the second embodiment, an insulating member is inserted into a groove formed so as to communicate with the yoke of the stator core in the axial direction, and a protrusion or a restriction surface provided on the insulator attached to the teeth. The movement of the insulating member along the axial direction is restricted.
Thereby, the operation | work which inserts an insulating member into a groove | channel becomes easy, and the movement of an insulating member can be controlled with a simple structure.

The insulator 400 of the second embodiment is not limited to the configuration described above, and various changes, additions, and deletions are possible.
The notch surface 444b of the protrusion 440, the notch surface 454b of the protrusion 450, the restriction surface 480a of the protrusion 480, and the restriction surface 490a of the protrusion 490 are connected to the edges 10a, 20a, 10b, and 20b of the insulating members 10 and 20. Although used as a regulating member that regulates movement, the regulating member is not limited to this. For example, a protrusion can be used as a restricting member.
The notch 455, the groove 445, the locking protrusion 446, and the protrusion 460 can be omitted.
The shapes of the inner wall surfaces 471 to 474 of the through hole 470 can be changed as appropriate.
As the insulating member, various shapes of insulating members can be used.
The shape of the groove 335 can be changed as appropriate.

Next, a method for fixing the end of the stator winding will be described with reference to FIG. FIG. 24 shows the insulator 200 of the first embodiment. Also in the insulator 400 of the second embodiment, the end portion of the stator winding can be fixed by the same method.
In a state where the insulators 200 are arranged adjacent to each other in the circumferential direction, the protrusions 240 of the one (circumferential other side) insulator 200 and the protrusions 250 of the other (circumferential one side) insulator 200 are mutually connected. It arrange | positions in the position which opposes.
Here, the protrusion 240 opens to the end surface 211, the outer peripheral surface 210A, and the inner peripheral surface 210B, and extends from the end surface 211 along the axial direction to the radially outer side from the outer wall surface 242. It has the latching protrusion part 246 which protrudes.
Further, the protrusion 250 has a cutout portion 255 on the side of the end surface 211 that is cut out on the side surface 214 side. That is, a space is formed between the one insulator 200 and the other insulator 200 by the side surface 213 of the one insulator 200 and the notch 255 of the protrusion 250 of the other insulator 200.
Therefore, as shown in FIG. 24, the end of the stator winding 150 wound around the insulator 200 is wound through the groove 245 of the protrusion 240, or the end of the stator winding 150 is The work of tying and fixing with a string can be easily performed.
In addition, the end of the stator winding 150 and the string 160 are locked to the locking surface 246a on the other side in the axial direction of the locking protrusion 246 that protrudes radially outward from the outer wall surface 241 of the protrusion 240. By doing so, the end of the stator winding 150 can be more reliably fixed. Reference numeral 161 denotes a knot of the string 160.

As described above, the insulator 200 of the present embodiment has the protrusion 240 on the side surface 213 side (one side in the circumferential direction) on the end surface 211 side (one side in the axial direction), and A groove 245 that is open on the end face 211 side (one side in the axial direction) and a locking projection 246 that protrudes radially outward are provided. In addition, the end face 211 side (one axial direction side) has a protrusion 250 on the side face 214 side (circumferential other side), and the protrusion 250 has an end face 211 side (one axial direction side) and a side face 214. A cutout portion 255 is provided in which the side (the other side in the circumferential direction) is cut away.
Thereby, the edge part of the stator coil | winding 150 wound around the insulator 200 can be fixed easily.
In addition, although the protrusion 240 was provided in the side 213 side (circumferential one side) and the protrusion 250 was provided in the side 214 side (circumferential other side), the protrusion 240 was provided in the side 214 (circumferential other side). It is also possible to provide a protrusion 250 on the side surface 213 side (one circumferential side).
In addition, the protrusions 240 and 250 projecting radially outward from the outer peripheral surface 210A are provided, the groove 240 and the locking protrusion 246 are provided in the protrusion 240, and the notch 255 is provided in the protrusion 250. The protrusions 240 and 250 can be omitted. In this case, the groove 245, the locking projection 246, and the notch 255 are provided in the first flange 210.
Further, the locking projection 246 can be omitted.
Further, the string-like member that binds the end of the stator winding 150 is not limited to the string.

The present invention is not limited to the configuration described in the embodiment, and various changes, additions, and deletions are possible.
Each structure demonstrated by each embodiment can also be used independently, and can also be used combining the some structure selected suitably.
The electric motor of the present invention can be used as an electric motor for driving various devices such as an electric motor for driving an air conditioner, an electric motor for driving a vehicle, and an electric motor for driving an in-vehicle device.

10, 20 Insulating film (insulating member)
10a, 20a Edge (first edge)
10b, 20b Edge (second edge)
10c, 10d, 20c, 20d Edges 10A, 10B, 10C Folding line 11 First edge part 12 First center part 13 Second center part 14 Second edge part 100, 300 Stator 110, 310 Stator Core 110A, 110B, 310A, 310B Stator core end surface 120, 320 First core member 121, 321 Teeth 122, 322 Teeth base portion 122a, 122b, 122c, 122d Outer wall surface 123, 323 Teeth distal end portion 124, 324 Teeth distal end surface 125, 325 connecting portion 127, 327 caulking projection 130, 330 second core member 131, 331 yoke 132, 332 yoke outer peripheral surface 133, 333 yoke inner peripheral surface 133a, 133b, 333a, 333b yoke inner peripheral surface portion 134, 334 Recess 134a, 334a Recess formation 137,327 caulking projections 150 stator winding 160 string (string-shaped member)
161 Knot 200, 400 Insulator 210, 410 First collar 210A, 410A outer circumferential surface (first collar outer circumferential surface)
210B, 410B inner peripheral surface (first buttocks inner peripheral surface)
211, 411 end face (first collar end face)
212, 412 end face (second collar end face)
213, 413 Side (first buttocks side)
214, 414 Side (second collar side)
220, 420 2nd collar part 220A, 420A inner peripheral surface (2nd collar inner peripheral surface)
220B, 420B outer peripheral surface (second flange outer peripheral surface)
221 and 421 end face (third collar end face)
222, 422 end face (fourth collar end face)
223, 423 side surface (third buttocks side surface)
224, 424 side surface (fourth buttocks side surface)
230, 430 Body 240, 440 Projection (first projection)
241, 242, 441, 442 Outer wall surface 243, 253 Outer wall surface (path forming surface)
244, 444 Notch 245, 445 Groove 245a, 245b, 245c, 245d, 245e, 445a, 445b, 445c, 445d, 445e Inner wall surface 246, 446 Locking protrusion 246a, 446a Locking surface 250, 450 Projection ( (Second protrusion)
251, 252, 253, 451, 452, 453 Outer wall surface 254, 454 Notch 255, 455 Notch 255a, 255b, 455a, 445b Notch 260, 460 Protrusion (guide protrusion)
261, 461 Outer wall surface (guide surface)
262, 462 Outer wall surface 270, 470 Through hole 271, 272, 273, 274, 471, 472, 473, 474 Inner wall surface 271a, 272a, 273a, 274a, 471a, 472a, 473a, 474a Inclined surface 280 Recessed portion (first Recess)
281 Bottom (first bottom)
281a, 281b, 281c End 282 Wall surface (first wall surface)
283 Wall surface (second wall surface)
284 Wall surface (third wall surface)
290 recess (second recess)
291 Bottom (second bottom)
291a, 291b, 291c End 292 Wall surface (fourth wall surface)
293 wall surface (fifth wall surface)
294 wall surface (sixth wall surface)
335 Groove 335a, 335b Groove forming surface 444a, 444b Notch surface 454a, 454b Notch surface 480 Projection (third projection)
480a Restriction surface 490 Protrusion (fourth protrusion)
490a Regulatory aspects

Claims (7)

An insulator attached to a tooth extending radially inward from a yoke extending along the circumferential direction,
It extends along the axial direction and the circumferential direction, and has a first flange outer peripheral surface on the radially outer peripheral side, a first flange inner peripheral surface on the radial inner peripheral side, and a first flange on one axial side. A first flange having an end surface, a second flange end surface on the other axial side, a first flange side surface on one circumferential side, and a second flange side surface on the other circumferential side;
It is arranged on the radially inner peripheral side from the first flange, extends along the axial direction and the circumferential direction, and has a second flange outer peripheral surface on the radial outer peripheral side and a second on the radial inner peripheral side. A second collar having a collar inner peripheral surface;
A body portion provided between the first flange portion and the second flange portion and extending along a radial direction;
A through-hole extending along the radial direction and opening in the first collar outer peripheral surface and the second collar inner peripheral surface;
The first flange has a first recess and a second recess recessed from an outer peripheral surface of the first flange,
The first recess is provided on the side of the first flange side with respect to the through-hole, and extends along the axial direction and the circumferential direction. The side is open,
The second recess is provided on the side of the second flange side with respect to the through-hole, and extends along the axial direction and the circumferential direction, and has a radially outer side and a side of the second flange. An insulator characterized in that the side is open. The insulator of claim 1,
The first recess is connected to a first bottom surface extending along the axial direction and the circumferential direction, and a first end portion of the first bottom surface on the first flange end surface side, Connected to the first wall surface extending along the direction and the radial direction, and the second end portion of the first bottom surface on the second flange end surface side, and extending along the circumferential direction and the radial direction Formed by a second wall surface that is present, and a third wall surface that is connected to the third end of the first bottom surface on the through-hole side and extends along the axial direction and the radial direction,
The second recess is connected to a second bottom surface extending along the axial direction and the circumferential direction, and a fourth end portion of the second bottom surface on the first flange end surface side, and Connected to the fourth wall surface extending along the direction and the radial direction, and the fifth end of the second bottom surface on the second flange end surface side, and extending along the circumferential direction and the radial direction The fifth wall surface that is present and the sixth wall surface that is connected to the sixth end portion on the through-hole side of the second bottom surface and extends along the axial direction and the radial direction. An insulator characterized by that. The insulator according to claim 2, wherein
The first collar part is radially outer than the first collar part outer peripheral surface in the first collar part side surface region on the first collar part end face side with respect to the through hole. A first protrusion projecting into the first flange part in the region of the second collar side surface side of the first collar part end surface side with respect to the through-hole. A second protrusion projecting radially outward from the outer peripheral surface;
At least a part of the first wall surface and the third wall surface is formed by an outer wall surface of the first protrusion,
At least a part of the fourth wall surface and the sixth wall surface is formed by an outer wall surface of the second protrusion. A stator core, an insulator, a stator winding, and an insulating member;
The stator core includes a yoke extending along a circumferential direction when viewed in a cross section perpendicular to the axial direction, and a plurality of teeth extending radially inward from the yoke, and each of the teeth. Has a tooth base extending radially inward from the yoke, and a tooth tip provided on the radially inner peripheral side of the teeth base and extending in the circumferential direction;
The insulator is attached to the teeth;
The stator winding is wound around the insulator attached to the teeth,
The insulating member is a stator disposed between the insulator and the yoke,
As the insulator, the insulator according to any one of claims 1 to 3 is used,
The insulating member has a first edge on one side in the circumferential direction and a second edge on the other side in the circumferential direction, and the first edge is formed of two insulators adjacent in the circumferential direction. Of these, the second concave portion of the insulator on one side in the circumferential direction is arranged, and the second edge portion is arranged in the first concave portion of the insulator on the other side in the circumferential direction. stator. The stator according to claim 4, wherein
The insulating member includes a first edge portion including the first edge portion, a second edge portion including the second edge portion, and the first edge portion and the second edge portion. A first central portion and a second central portion provided therebetween, and is bent in a V shape when viewed from a direction perpendicular to the axial direction;
The first central portion and the second central portion extend along a radial direction between the insulator on one side in the circumferential direction and the insulator on the other side in the circumferential direction. And the stator. The stator according to claim 4 or 5, wherein
The stator core is constituted by a first core member having the teeth and a second core member having the yoke. An electric motor comprising a stator and a rotor rotatable relative to the stator,
An electric motor using the stator according to any one of claims 4 to 6 as the stator.

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