JP2019180170A - Winding insulation member, stator, and dynamo-electric motor - Google Patents

Abstract

Provided is a technique capable of improving the insertion workability and the retention of a winding insulating member. A winding insulating member includes first edges 311 and 312 extending along a second direction (A direction) on one side and the other side in a first direction (B direction), and a second direction. Is formed by bending an insulating film 320 formed by a third edge 313 and a fourth edge 314 extending along the first direction on one side and the other side along the first and fourth sides. 310A to 310D. The third edge portion 313 has a first end portion 313a, a first inclined portion 313b, a first central portion 313c (313c1 and 313c2), a second inclined portion 313d, and a second end portion 313e. The fourth edge portion 314 has a third end portion 314a, a third inclined portion 314b, a second central portion 314c (314c1 and 314c2), a fourth inclined portion 314d, and a fourth end portion 313e. [Selection diagram] FIG.

Description

  The present invention relates to a stator winding wound around a tooth of a stator core and a winding insulating member that insulates the stator core.

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 by a concentrated winding method ( Called “concentrated winding motor”). In the concentrated winding motor, the stator winding is wound around the teeth via an insulator (referred to as “resin bobbin”).
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 “child core” has been proposed.
An electric motor using a stator core having a divided structure is disclosed in, for example, Patent Document 1 (Japanese Patent Laid-Open No. 6-225490). 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. The stator core is formed by assembling the first core member and the second core member in a state where the insulator around which the stator winding is wound is attached to each tooth of the first core member. Further, the electric motor disclosed in Patent Document 1 has a winding insulating member for preventing the stator winding wound around the insulator from coming into contact with the yoke of the stator core. The winding insulating member disclosed in Patent Document 1 is formed in a plate shape, and is inserted into a space between the overhanging portion of the insulator and the yoke. The winding insulating member is formed with inclined portions for improving insertion workability on both side surfaces on the distal end side in the insertion direction. In addition, the overhanging portion of the insulator is provided with an inclined portion that holds the inclined portion of the winding insulating member with an elastic force in order to hold the winding insulating member in the space.
Patent Document 2 (Japanese Patent Laid-Open No. 2002-233092) includes a first insulating portion, a second insulating portion, a first holding portion, and a second holding portion, and is bent into a T shape. A winding insulation member is disclosed. The first holding portion and the second holding portion of the winding insulating member are inserted into a space between the stator winding and the stator yoke. On both side surfaces of the first holding portion and the second holding portion of the winding insulating member on the distal end side in the insertion direction, inclined portions for improving insertion workability are formed.

JP-A-6-225490 JP 2002-233092 A

In the stator disclosed in Patent Literature 1 and Patent Literature 2, inclined portions are formed on both side surfaces of the winding insulating member on the distal end side in the insertion direction. Thereby, insertion workability | operativity of a coil | winding insulation member can be improved. However, in the case of using the winding insulating member having such a shape, as a holding mechanism for holding the winding insulating member, the winding insulating member disclosed in Patent Document 1, on the distal side in the insertion direction, is disclosed. A holding mechanism that holds the inclined portions formed on both side surfaces by elastic force is used. In this case, it is difficult to stably hold the winding insulating member.
The present invention has been made in view of such a point, and an object thereof is to provide a technique capable of improving the insertion workability and holding performance of a winding insulating member.

The first invention relates to a winding insulation member.
The winding insulating member of the present invention is preferably used for insulating the stator winding wound around the insulator attached to the teeth and the yoke of the stator core. Embodiments are possible.
The winding insulating member of the present invention is formed on one side and the other side along the first direction, and extends along a second direction intersecting the first direction, and a first edge and a second edge, A third edge and a fourth edge are formed on one side and the other side along the second direction and extend along the first direction. Typically, the second direction extends in a direction perpendicular to the first direction (including “substantially right angle”). In addition, the 1st direction one side and the other side and the 2nd direction one side and the other side are prescribed | regulated suitably. Typically, in a state where the winding insulating member is mounted on the stator, the first direction extends along the axial direction of the stator, and the second direction extends along the circumferential direction of the stator. Extend.
The third edge portion has a first end portion, a first inclined portion, a first central portion, a second inclined portion, and a second end portion in the direction from the first edge portion to the second edge portion. The first inclined portion is inclined so that the end portion on the first central portion side is disposed on one side in the second direction from the end portion on the first end portion side. Further, the second inclined portion is inclined so that the end portion on the first central portion side is disposed on one side in the second direction from the end portion on the second end portion side. Typically, the first end portion, the first center portion, and the second end portion are formed so as to extend parallel to the first direction (including “substantially parallel”). The first inclined portion and the second inclined portion can be constituted by one or a plurality of inclined portions. When the first inclined portion is constituted by a plurality of inclined portions, “the end portion of the first inclined portion on the first central portion side” is “the inclined portion formed on the other side along the first direction”. "The end of the first central portion side", and "the end of the first inclined portion on the first end portion side" is the "inclined portion formed on the most side along the first direction" Of the first end portion side ”. Further, when the second inclined portion is constituted by a plurality of inclined portions, the “end portion of the second inclined portion on the first central portion side” is formed on the most one side along the first direction. "The end on the first central portion side of the inclined portion", and "the end on the second end portion side of the second inclined portion" is formed on the other side along the first direction. An end of the inclined portion on the second end portion side ”is shown.
The winding insulating member is preferably made of a plate-like insulating film formed of a resin having insulating properties, or is formed by bending a plate-like insulating film. In the case where the winding insulating member is constituted by a bent insulating film, the first end portion and the first inclined portion are included in the same bent piece (divided portion), and the second inclined portion and the second end portion are the same. It is set to be included in the bent piece (divided portion).
In the winding insulating member of the present invention, a first inclined portion is formed on one side in the first direction of the third edge, and a second inclined portion is formed on the other side in the first direction. Thereby, a coil | winding insulation member can be inserted easily. In addition, a first end portion is formed on one side in the first direction from the first inclined portion of the third edge portion, and a second end portion is formed on the other side in the first direction from the second inclined portion. Thereby, the position of the circumferential direction and axial direction of a coil | winding insulating member can be controlled reliably.
In another form of the first invention, the fourth edge is in the direction from the first edge to the second edge, the third end portion, the third inclined portion, the second central portion, the fourth inclined portion, and the fourth edge. It has an end part. The third inclined portion is inclined so that the end portion on the second center portion side is disposed on one side in the second direction from the end portion on the third end portion side. The fourth inclined portion is inclined so that the connection portion with the second central portion is disposed on one side in the second direction from the connection portion with the fourth end portion.
In the winding insulating member of this embodiment, a third end portion is formed on one side in the first direction from the second inclined portion of the fourth edge portion, and a fourth end portion is formed on the other side in the first direction from the fourth inclined portion. Is formed. Thereby, the position of the winding insulation member in the circumferential direction and the axial direction can be more reliably regulated. Moreover, the material loss at the time of cut | disconnecting an insulating sheet and forming a coil | winding insulating member can be reduced.
In another form of the first invention, the fourth edge is in the direction from the first edge to the second edge, the third end portion, the third inclined portion, the second central portion, the fourth inclined portion, and the fourth edge. It has an end part. The third inclined portion is inclined so that the end portion on the second center portion side is disposed on the other side in the second direction from the end portion on the third end portion side. Further, the fourth inclined portion is inclined so that the end portion on the second center portion side is disposed on the other side in the second direction from the end portion on the fourth end portion side.
In the winding insulating member of the present embodiment, the third end portion is formed on one side in the first direction from the third inclined portion of the fourth edge, and the fourth end portion is formed on the other side in the first direction from the fourth inclined portion. Is formed. Thereby, the position of the winding insulation member in the circumferential direction and the axial direction can be more reliably regulated. Further, since the winding insulating member can be inserted from the third edge side and the fourth edge side, the insertion workability can be further improved.
In another aspect of the first invention, the first divided portion defined by the first edge portion and the first bent portion, the first bent portion, and the first bent portion are extended by the first to third bent portions extending along the second direction. Divided into a second divided portion defined by the second bent portion, a third divided portion defined by the second bent portion and the third bent portion, and a fourth divided portion defined by the third bent portion and the second edge portion Has been. The first bent portion is set so as to pass through the connecting portion between the first inclined portion and the first central portion, and the second bent portion is a predetermined portion of the first central portion, preferably the center of the first central portion. The third bent portion is set so as to pass through the connecting portion between the first central portion and the second inclined portion.
And the 1st-4th division | segmentation part is bend | folded along the 1st-3rd bending part. In this embodiment, the second divided portion and the third divided portion are bent in a V shape along the second bent portion. The first divided portion is bent along the first bent portion to the opposite side of the V-shaped opening, and the fourth divided portion is bent along the third bent portion with the V-shaped opening. It is bent to the opposite side.
In this embodiment, the stator winding and the stator core can be insulated by the winding insulating member, and adjacent stator windings can be insulated.

The second invention relates to a stator. The stator of the present invention includes a stator core, an insulator, a stator winding, and a winding insulating member. Any of the above-described winding insulating members is used as the winding insulating member.
In the stator of the present invention, the winding insulating member can be easily inserted and the positions of the winding insulating member in the circumferential direction and the axial direction can be reliably regulated.
In another form of the second invention, the stator core includes 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. have. Each tooth has a tooth base extending from the yoke to the radially inner peripheral side, and a tooth tip provided on the radially inner peripheral side of the teeth base and extending along the circumferential direction.
The insulator is attached to the teeth in a state where the stator winding is wound. The winding insulating member is disposed between the insulator and the yoke of the stator core.
In this embodiment, the winding insulation member can be easily inserted between the stator winding wound around the insulator mounted on the teeth and the yoke of the stator core, and the circumferential direction of the winding insulation member And the position along an axial direction can be controlled reliably.
In another form of the second invention, the stator core is composed of a first core member having a plurality of teeth and a second core material having a yoke.
In this embodiment, it is possible to improve the workability and retention of the winding insulating member in the stator having the stator core having the divided structure.

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.
In the electric motor of the present invention, the winding insulating member can be easily inserted, and the circumferential and axial positions of the winding insulating member can be reliably regulated.

  In the winding insulating member, the stator, and the electric motor of the present invention, the insertion workability of the winding insulating member can be improved, and the holding performance of the winding insulating member can be improved.

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 which comprises 1st Embodiment of a stator. It is a perspective view of 1st Embodiment of the insulator of this invention. It is the figure which looked at FIG. 3 from the direction of arrow IV. FIG. 4 is a diagram when FIG. 3 is viewed from the direction of an arrow V. It is the figure which looked at FIG. 3 from the direction of arrow VI. It is the figure seen from the VII-VII line of FIG. 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 film. It is an expanded view of 1st Embodiment of an insulating film. It is a figure which shows an example of the manufacturing method of 1st Embodiment of an insulating film. It is a figure which shows the state which attached 1st Embodiment of the insulating film using the insulator of 1st Embodiment. It is a figure which shows the state by which 1st Embodiment of an insulating film is hold | maintained at 1st Embodiment of an insulator. It is a perspective view of 2nd Embodiment of an insulating film. It is an expanded view of 2nd Embodiment of an insulating film. It is a figure which shows the state by which 2nd Embodiment of an insulating film is hold | maintained at 1st Embodiment of an insulator. It is a figure which shows the state by which 2nd Embodiment of an insulating film is hold | maintained at the modification of 1st Embodiment of an insulator. It is a perspective view of 3rd Embodiment of an insulating film. It is an expanded view of 3rd Embodiment of an insulating film. It is a figure which shows the state by which 3rd Embodiment of an insulating film is hold | maintained at 1st Embodiment of an insulator. 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 which comprises 2nd Embodiment of a stator. It is a perspective view of 2nd Embodiment of the insulator of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
In this specification, the description of “axial direction” refers to a rotation center line P (FIG. 1, FIG. 1) that passes through the rotation center of the rotor in a state where the rotor is rotatably arranged relative to the stator. 21)). The term “circumferential direction” refers to a circumferential direction centered on the rotation center line 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. Indicates. The description “radial direction” indicates a direction passing through the rotation center line 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 rotation center line P side along the radial direction, and the description “radial outer periphery side” indicates the side opposite to the rotation center line P along the radial direction.
For insulators, the descriptions “axial direction”, “circumferential direction” and “radial direction” refer to “axial direction”, “circumferential direction” and “axial direction” when the insulator is attached to the stator core. "Diameter direction" is shown.
Further, in this specification, the descriptions “parallel”, “right angle”, and “flat” are used to include “substantially parallel”, “substantially right angle”, and “substantially flat”, respectively.
Further, in this specification, for convenience, the upper side and the lower side in FIG. 4 will be described as “one axial side” and “the other axial side”, respectively, and the right side and the left side in FIG. Although described as “one side” and “the other side in the circumferential direction”, “one” and “the other” are not limited to this, and an appropriate direction can be selected.

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 according to the present embodiment includes a stator core 110, an insulator 200, a stator winding (not shown), and an insulating film 310.

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 includes a first core member 120 and a second core member 130, as shown in FIG. FIG. 2 shows a view in which the first core member 120 and the second core member 130 are viewed from a direction perpendicular to the axial direction.
The first core member 120 (referred to as an “inner core”) is configured by a laminated body in which a plurality of electromagnetic steel plates are laminated using caulking protrusions 126. 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 laminated body in which a plurality of electromagnetic steel plates are laminated using caulking protrusions 136. 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. By the recess forming surface 134a, a recess 134 is formed into which the end portion on the radially outer peripheral side of the tooth 121 (specifically, the tooth base 122) of the first core member 120 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 shrink-fitted or fitted) 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. Formed by 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.

  A stator winding (not shown) is wound around an insulator attached to the tooth 121. That is, the stator winding is wound around the teeth 121 by a concentrated winding method. As a method of winding the stator winding around the tooth 121, a method of winding the stator winding around the insulator while the insulator is attached to the tooth 121, or winding the stator winding around the insulator. In this state, a method of attaching an insulator to the teeth 121 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 diagram of FIG. 3 viewed from the direction of arrow IV, FIG. 5 is a diagram of FIG. 3 viewed from the direction of arrow V, and FIG. 6 is a diagram of FIG. 3 viewed from the direction of arrow VI. FIG. 7 is a diagram of FIG. 3 viewed from the line VII-VII.

The insulator 200 (referred to as “resin bobbin”) is formed of a resin having insulating properties, such as polybutylene terephthalate (PBT) resin, polyphenylene sulfide (PPS) resin, liquid crystal polymer (LCP) resin, nylon, etc. Is done.
The insulator 200 has a first flange part 210, a second flange part 220, a body part 230, and a through hole 240.
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 (the front side in FIG. 4). An inner peripheral surface 210B on the radially inner peripheral side (back side in FIG. 4), an end surface 211 on one axial side (upper side in FIG. 4), an end surface 212 on the other axial side (lower side in FIG. 4), and 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 disposed 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 on the radially outer peripheral side and on the radially inner peripheral side. The inner circumferential surface 220B has an end surface 221 on one axial side, an end surface 222 on the other axial side, a side surface 223 on one circumferential side, and a side surface 224 on the other circumferential side.
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 240 is formed inside the trunk portion 230 so as to extend along the radial direction and the axial 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. ing.

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 outer peripheral surface”, “first inner peripheral surface”, “first” of the present invention, respectively. It corresponds to “end face”, “second end face”, “first side face” and “second side face”.
Further, 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 220 are respectively referred to as “second outer peripheral surface”, “second inner peripheral surface”, “ It corresponds to “third end face”, “fourth end face”, “third side face”, and “fourth side face”.

The through hole 240 is formed by inner wall surfaces 241 to 244. 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 240 from the second flange portion 220 side, the outer wall surfaces 122 a, 122 b, 122 c of the teeth base portion 122. And 122d are inserted so as to face the inner wall surfaces 241, 242, 243 and 244 of the through-hole 240, respectively.
The inner wall surfaces 241, 242, 243, and 244 of the through hole 240 have inclined surfaces 241a, 242a, 243a, and 244a on the inner peripheral surface 220B side of the second flange 220. Accordingly, the teeth base 122 (the teeth 121) can be easily inserted into the through hole 240 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 250, 260, and 270 that protrude from the outer peripheral surface 210A to the outer peripheral side in the radial direction. In this embodiment, 210 A of outer peripheral surfaces are formed in the flat surface extended along the circumferential direction and an axial direction.

The protrusion 250 is provided on the end face 212 side with respect to the through hole 240.
The protrusion 250 has an outer wall surface 251 on the end surface 212 side (the other side in the axial direction), and an outer wall surface 252 on the through hole 240 side (the one side in the axial direction). The outer wall surface 251 is formed on an inclined surface that increases in distance from the outer peripheral surface 210A from the end surface 212 side toward the through hole 240 side. Since the outer wall surface 251 of the protrusion 250 is inclined, the end of the teeth base 122 inserted into the through hole 240 of the insulator 200 and protruding from the through hole 240 (from the outer peripheral surface 210A of the first flange 210). When the portion is press-fitted into the recess 134 of the second core member 130, the end of the teeth base 122 is easily guided into the recess 134.
The protrusion 250 corresponds to the “guide protrusion” of the present invention, and the outer wall surface 251 of the protrusion 250 corresponds to the “guide surface” of the present invention.

The protrusion 260 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 240.
The protrusion 260 is formed on the outer peripheral side in the radial direction and extends along the circumferential direction and the axial direction. The outer wall surface 261 is formed on the other side in the axial direction and extends along the circumferential direction. An outer wall surface 264 that is formed on one side (opposite the protrusion 270) and extends along the axial direction, and is formed on the other circumferential side (side facing the protrusion 270) and extends along the axial direction. The outer wall surface 263 to be used is provided. In addition, the outer wall surface on one side in the axial direction of the protrusion 260 is formed by the end surface 211 of the first flange 210 (equal to the end surface 211).
The outer wall surface 264 has a first outer wall surface portion 264a, a second outer wall surface portion 264b, a third outer wall surface portion 264c, a fourth outer wall surface portion 264d, and a fifth outer wall surface from one axial direction to the other axial direction. A portion 264e is provided.
In the present embodiment, the first outer wall surface portion 264a and the fifth outer wall surface portion 264e extend in parallel to the axial direction, and the second outer wall surface portion 264b and the third outer wall surface portion 264c are from the dark portion on the side surface 213. The fourth outer wall surface portion 264d extends in an inclined manner with respect to the axial direction and the circumferential direction, and extends in parallel to the circumferential direction (perpendicular to the axial direction). The second outer wall surface portion 264b is arranged such that the end portion on the first outer wall surface portion 264a side is arranged on one axial side and the other circumferential side from the end portion on the third outer wall surface portion 264c side (side surface 213 side). It is inclined to. The first outer wall surface portion 264 a and the second outer wall surface portion 264 b form a notch 265 that is recessed from the side surface 213 and the end surface 211. The third outer wall surface portion 264c has an end portion on the fourth outer wall surface portion 264d side disposed on the other side in the axial direction and the other circumferential direction from the end portion on the second outer wall surface portion 264b side (side surface 213 side). It is inclined so that. The third outer wall surface portion 264c, the fourth outer wall surface portion 264d, and the fifth outer wall surface portion 264e form a notch 266 that constitutes a part of a recess 280 described later.

The protrusion 270 is provided in a region on the side surface 214 side (the other side in the circumferential direction) on the end surface 211 side (the one side in the axial direction) from the through hole 240.
The protrusion 270 is formed on the outer peripheral side in the radial direction and extends along the circumferential direction and the axial direction. The outer wall surface 271 is formed on the other side in the axial direction and extends along the circumferential direction. The outer wall surface 273 is formed on one side (the side facing the protrusion 260) and extends along the axial direction, and is formed on the other circumferential side (the side opposite to the protrusion 260) and extends along the axial direction. It has the outer wall surface 274 to be. In addition, the outer wall surface on one side in the axial direction of the protrusion 270 is formed by the end surface 211 of the first flange portion 210 (equal to the end surface 211).
The outer wall surface 274 includes a first outer wall surface portion 274a, a second outer wall surface portion 274b, a third outer wall surface portion 274c, a fourth outer wall surface portion 274d, and a fifth outer wall surface from one axial direction to the other axial direction. A portion 274e is provided.
In the present embodiment, the first outer wall surface portion 274a and the fifth outer wall surface portion 274e extend in parallel to the axial direction, and the second outer wall surface portion 274b and the third outer wall surface portion 274c are end portions on the side surface 214. The fourth outer wall surface portion 274d extends in parallel to the circumferential direction (perpendicular to the axial direction). The second outer wall surface portion 274b is arranged such that the end portion on the first outer wall surface portion 274a side is arranged on one axial side and one circumferential side from the end portion on the third outer wall surface portion 274c side (side surface 214 side). It is inclined to. The first outer wall surface portion 274a and the second outer wall surface portion 274b form a notch 275 that is recessed from the side surface 214 and the end surface 211. The third outer wall surface portion 274c has an end portion on the fourth outer wall surface portion 274d side disposed on the other side in the axial direction and one side in the circumferential direction from the end portion on the second outer wall surface portion 274b side (side surface 214 side). It is inclined so that. The third outer wall surface portion 274c, the fourth outer wall surface portion 274d, and the fifth outer wall surface portion 274e form a notch 276 that constitutes a part of a recess 290 described later.
Further, a locking projection 277 is provided that protrudes from the first outer wall surface portion 274a of the projection 270 to the other circumferential side. The locking protrusion 277 has a protrusion 278 that protrudes on the other side in the axial direction at the end on the other side in the circumferential direction.
The locking projection 277 fixes the end of the stator winding as will be described later. In addition, the notches 265 and 275 secure a working space for fixing the end of the stator winding.

Further, the first flange portion 210 is provided with a concave portion 280 and a concave portion 290 that are recessed from the outer peripheral surface 210A toward the radially inner peripheral side.
The concave portion 280 is provided on the side surface 213 side (one side in the circumferential direction) with respect to the through-hole 240, and one side in the circumferential direction (side surface 213 side) and the radially outer side are open. The concave portion 280 includes a bottom surface 281, first and second wall surfaces provided on one axial side and the other axial side of the bottom surface 281, and a third wall surface provided on the other circumferential side of the bottom surface 281. Is formed.
The bottom surface 281 of the recess 280 extends along the axial direction and the circumferential direction. In the present embodiment, the bottom surface 281 is formed as a flat surface.
A first wall surface on one axial side of the recess 280 is formed by a third outer wall surface portion 264 c and a fourth outer wall surface portion 264 d of the protrusion 260. In the present embodiment, the fourth outer wall surface portion 264d extends in parallel to the circumferential direction, and the third outer wall surface portion 264c extends in an inclined manner with respect to the circumferential direction and the axial direction.
The second wall surface on the other side in the axial direction of the recess 280 is formed by a wall surface 282 extending along the circumferential direction. In the present embodiment, the wall surface 282 extends in parallel to the circumferential direction.
The third wall surface on the other circumferential side of the recess 280 is formed by a wall surface 283 extending along the axial direction and a fifth outer wall surface portion 264e of the protrusion 260. In the present embodiment, the wall surface 283 and the fifth outer wall surface portion 264e extend in parallel to the axial direction.
The recess 280 regulates the positions in the circumferential direction and the axial direction of the other circumferential side portion of the insulating film described later.

The concave portion 290 is provided on the side surface 214 side (the other side in the circumferential direction) with respect to the through-hole 240, and the other side in the circumferential direction (the side surface 214 side) and the radially outer side are open. The concave portion 290 includes a bottom surface 291, first and second wall surfaces provided on one axial side and the other axial side of the bottom surface 291, and a third wall surface provided on one circumferential side of the bottom surface 281. Is formed.
The bottom surface 291 of the recess 290 extends along the axial direction and the circumferential direction. In the present embodiment, the bottom surface 291 is formed as a flat surface.
A first wall surface on one axial side of the recess 290 is formed by a third outer wall surface portion 274c and a fourth outer wall surface portion 274d of the protrusion 270. In the present embodiment, the fourth outer wall surface portion 274d extends in parallel to the circumferential direction, and the third outer wall surface portion 274c extends in an inclined manner with respect to the circumferential direction and the axial direction.
The second wall surface on the other side in the axial direction of the recess 290 is formed by a wall surface 292 extending along the circumferential direction. In the present embodiment, the wall surface 292 extends parallel to the circumferential direction.
A third wall surface on one circumferential side of the recess 290 is formed by a wall surface 293 extending along the axial direction and a fifth outer wall surface portion 274e of the protrusion 270. In the present embodiment, the wall surface 293 and the fifth outer wall surface portion 274e extend in parallel to the axial direction.
The recessed part 290 regulates the position in the circumferential direction and the axial direction of a part on one side in the circumferential direction of the insulating film described later.

The protrusion 260 corresponds to the “first protrusion” of the present invention, the protrusion 270 corresponds to the “second protrusion” of the present invention, and the recess 280 corresponds to the “first position restricting portion” of the present invention. Or it corresponds to the “first recess”, and the recess 290 corresponds to the “second position restricting portion” or the “second recess” of the present invention.
The third outer wall surface portion 264c and the fourth outer wall surface portion 264d of the protrusion 260 constitute the “first wall surface of the first position restricting portion” or the “first recess forming surface of the first recess” in the present invention. 282 constitutes the “second wall surface of the first position restricting portion” or the “second recess forming surface of the first recess” of the present invention, and the wall surface 283 and the fifth outer wall surface portion 264e of the protrusion 260 constitute the present invention. The “third wall surface of the first position restricting portion” or “the third recess forming surface of the first recess” is configured.
The fourth outer wall surface portion 264d of the protrusion 260 corresponds to “the first wall surface first portion of the first position restricting portion” or “the first recess forming surface first portion of the first recess” of the present invention. The third outer wall surface portion 264c of 260 corresponds to “a first wall surface second portion of the first position restricting portion” or “a first recess forming surface second portion of the first recess” of the present invention.
The third outer wall surface portion 274c and the fourth outer wall surface portion 274d of the protrusion 270 constitute the “fourth wall surface of the second position restricting portion” or the “fourth recess forming surface of the second recess” in the present invention. 292 constitutes the “fifth wall surface of the second position restricting portion” or “fifth concave portion forming surface of the second concave portion” of the present invention, and the wall surface 293 and the fifth outer wall surface portion 274e of the protrusion 270 constitute the present invention. The “sixth wall surface of the second position restricting portion” or “the sixth recess forming surface of the second recess” is configured.
The fourth outer wall surface portion 274d of the protrusion 270 corresponds to the “fourth wall surface first portion of the second position restricting portion” or the “fourth recess forming surface first portion of the second recess” of the present invention. The third outer wall surface portion 274c of 270 corresponds to the “fourth wall surface second portion of the second position restricting portion” or the “fourth recess forming surface second portion of the second recess portion” of the present invention.

Further, the side surface 213 on the one circumferential side of the first flange portion 210 has side surface portions 213a and 213b from the other axial side to the one axial side. The side surface portion 213b is formed in a region corresponding to the recess 280, and has a thickness smaller than the thickness of the side surface portion 213a.
Further, the side surface 214 on the other circumferential side of the first flange portion 210 has side surface portions 214a, 214b, 214c and 214d from the other axial direction to the one axial direction. Side portions 214b, 214c, and 214d are formed in regions corresponding to recesses 290, and have a thickness that is less than the thickness of side portion 214a. The side surface portion 214b extends in the same direction as the extending direction of the side surface portion 214a, and the side surface portions 214c and 214e extend in an inclined manner with respect to the extending direction of the side surface portion 214b (214a). . In the present embodiment, the side surface portion 214b is inclined such that the end portion on the side surface portion 214c side is disposed on one side in the axial direction and one side in the circumferential direction from the end portion on the side surface portion 214a side. The side surface portion 214d is inclined so that the end portion on the side surface portion 214c side is disposed on the other side in the axial direction and one side in the circumferential direction from the end portion on the opposite side to the side surface portion 214c. The side portions 214c and 214d form a concave portion 215 that is recessed on one side in the circumferential direction. The side portion 214b and the recess 215 will be described later.

Moreover, the 2nd collar part 220 is provided with the protrusion part which protrudes in the radial direction inner peripheral side from the internal peripheral surface 220B in the axial direction one side. Thus, the side surface 223 of the second flange 220 has a side surface portion 223a and a side surface portion 223b thicker than the side surface portion 223a, and the side surface 224 has a side surface portion 224a and a side surface portion 224b thicker than the side surface portion 224a. ing. A step surface 225 is formed between the side surface portions 223a and 223b and between the side surface portions 224a and 224b.
In addition, a protrusion 225 that protrudes from the end surface 221 of the second flange 220 to the one side in the axial direction is provided. The protrusion 225 has a protrusion 226 that protrudes radially inward.

Next, an operation for 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 portion of the tooth base portion 122 of the tooth 121 is inserted into the through hole 240 of the insulator 200 from the second flange portion 220 side. At this time, the end portion of the teeth base 122 is guided into the through hole 240 by the inclined surfaces 241 a to 244 a on the radially inner peripheral side of the inner wall surfaces 241 to 244 forming the through hole 240. 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 is wound with the insulator 200 mounted on the tooth 121 of the first core member 120. In the present embodiment, the stator winding is wound around the space formed by the first flange portion 210, the second flange portion 220, and the body portion 230 of the insulator 200.
As for the mounting of the insulator 200 and the winding of the stator winding 610, a method of mounting the insulator 200 on the teeth 121 of the first core member 120 in a state where the stator winding is wound around the insulator 200 is used. You can also.

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 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 240 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.
In the present embodiment, when the end portion of the teeth base portion 122 inserted into the through hole 240 of the insulator 200 is press-fitted into the concave portion 134 of the second core member 130 while being moved along the axial direction, the end surface is inserted from the through hole 240. The end of the teeth base 122 is guided into the recess 134 by the outer wall surface 251 of the protrusion 250 formed on the 212 side (the other side in the axial direction). Thereby, it can prevent that the 1st core member 120 or the insulator 200 and the 2nd core member 130 contact with a strong force, the 1st core member 120 or the 2nd core member 130 deform | transforms, or is insulated. It is possible to prevent the body 200 from being cracked.
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 axial direction of the teeth base portion 122 protruding from the outer peripheral surface 210 </ b> A 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 insertion into the concave portion 134 can be used on the one side wall surface 122a.
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, a movement path of the press-fitting jig is formed in the first flange portion 210 by the outer wall surface portion 263 of the protrusion 260 and the outer wall surface portion 273 of the protrusion 270 on the end surface 211 side from the through hole 240. Yes. 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 portion 263 of the protrusion 260 corresponds to the “path forming surface of the first protrusion” of the present invention, and the outer wall surface portion 273 of the protrusion 270 is the “path forming surface of the second protrusion” of the present invention. Accordingly, the outer wall surface portion 263 of the protrusion 260 and the outer wall surface portion 273 of the protrusion 270 form the “movement path of the press-fitting jig” of the present invention.

Next, an insulating film that insulates the stator winding wound around the insulator 200 from the yoke 131 of the stator core will be described. The insulating film is disposed between the insulator 200 and the yoke 131. The insulating film is preferably formed of a resin having insulating properties, such as a polyethylene terephthalate resin or a polyethylene naphthalate resin.
The insulating film only needs to be disposed so as to be able to insulate between the stator winding wound around the insulator 200 and the yoke 131, and the entire insulating film is formed between the insulator 200 and the yoke 131. It does not need to be arranged between. That is, at least a part of the insulating film only needs to be disposed between the insulator 200 and the yoke 131.

A first embodiment 310 of an insulating film will be described with reference to FIGS. FIG. 9 is a perspective view of the insulating film 310, and FIG. 10 is a development view of the insulating film 310.
Note that the B direction, A direction, and C direction shown in FIG. 9 are orthogonal to each other in a state where the insulating film 310 is inserted and held between the insulator 200 and the yoke 131. It extends substantially parallel to the direction and the radial direction.
The B direction, the A direction, and the C direction correspond to the “first direction”, the “second direction that intersects the first direction”, and the “third direction that intersects the first direction and the second direction” of the present invention, respectively. .

The insulating film 310 of the first embodiment is formed by bending a plate-like insulating film 320 shown in FIG.
The insulating film 320 is formed on one side in the B direction and the other side in the B direction, and is formed on the one side in the A direction and the other side in the A direction, and extends in the A direction. Edge 323 and edge 324 extending along the edge.
The edge portion 323 has a first end portion 323a, a first inclined portion 323b, a central portion 323c, a second inclined portion 323d, and a second end portion 323e from the one side in the B direction toward the other side in the B direction. . In the present embodiment, the first end portion 323a, the central portion 323c, and the second end portion 323e extend in parallel to the B direction, and the first inclined portion 323b and the second inclined portion 323d are in the A direction and the B direction. In contrast, it extends in an inclined manner. The first inclined portion 323b is inclined such that the end portion on the central portion 323c side is disposed on one side in the A direction and the other side in the B direction from the end portion on the first end portion 323a side. The second inclined portion 323d is inclined so that the end portion on the central portion 323c side is disposed on one side in the A direction and one side in the B direction from the end portion on the second end portion 323e side.
The edge portion 324 has a first end portion 324a, a first inclined portion 324b, a central portion 324c, a second inclined portion 324d, and a second end portion 324e from one side in the B direction toward the other side in the B direction. . In the present embodiment, the first end portion 324a, the central portion 324c, and the second end portion 324e extend in parallel to the B direction, and the first inclined portion 324b and the second inclined portion 324d are in the A direction and the B direction. In contrast, it extends in an inclined manner. The first inclined portion 324b is inclined so that the end portion on the central portion 324c side is disposed on one side in the A direction and the other side in the B direction from the end portion on the first end portion 324a side. The second inclined portion 324d is inclined so that the end portion on the center portion 324c side is disposed on one side in the A direction and one side in the B direction from the end portion on the second end portion 324e side.

The insulating film 310 is formed by bending the plate-shaped insulating film 320 shown in FIG. 10 along the bent portions L1 to L3.
In the present embodiment, the bent portion L1 is set to pass through the center of the central portion 323c of the edge portion 323 (the center of the central portion 324c of the edge portion 324). The bent portion L2 is set so as to pass through a connection point between the first inclined portion 323b of the edge 323 and the central portion 323c (connection point of the first inclined portion 324b and the central portion 324c of the edge 324). The bent portion L3 is set so as to pass through a connection point between the central portion 323c of the edge portion 323 and the second inclined portion 323d (a connection point between the central portion 424c of the edge portion 324 and the second inclined portion 324d).
The insulating film 310 obtained by bending the plate-like insulating film 320 along the bent portions L1 to L3 is formed of the first divided portion 310A to the fourth divided portion 310D as shown in FIG. It has a letter shape.
That is, the second divided portion 310B divided by the bent portions L1 and L2 and the third divided portion 310C divided by the bent portions L1 and L3 are bent into a V shape along the bent portion L1. Further, the first divided portion 310A divided by the edge portion 321 and the bent portion L2 is bent along the bent portion L2 to the side opposite to the V-shaped opening. Further, the third divided portion 310D divided by the edge portion 322 and the bent portion L3 is bent along the bent portion L3 to the side opposite to the V-shaped opening.
The folded insulating film 310 has edges 311 and 312 extending along the A direction and edges 313 and 314 extending along the B direction. The edge portion 313 includes a first end portion 313a, a first inclined portion 313b, a central portion 313c (a central portion first portion 313c1, a central portion second portion 313c2), a second inclined portion 313c, and a second end portion 313e. ing. The edge portion 314 includes a first end portion 314a, a first inclined portion 314b, a central portion 314c (a central portion first portion 314c1, a central portion second portion 314c2), a second inclined portion, and a second end portion 314e. Yes.

The insulating film 310 corresponds to the “winding insulating member” of the present invention.
The edges 311, 312, 313, and 314 correspond to the “first edge”, “second edge”, “third edge”, and “fourth edge” of the present invention, respectively. Further, the first end portion 313a, the first inclined portion 313b, the central portion 313c, the central portion first portion 313c1, the central portion second portion 313c2, the second inclined portion 313d, and the second end portion 313e of the edge 313 are respectively provided. “First end portion”, “first inclined portion”, “first central portion”, “first central portion first portion”, “first central portion second portion”, “second inclined portion” of the present invention And “second end portion”. Further, the first end portion 314a, the first inclined portion 314b, the central portion 314c, the central portion first portion 314c1, the central portion second portion 314c2, the second inclined portion 314d, and the second end portion 314e of the edge portion 314 are respectively provided. “Third end portion”, “third inclined portion”, “second central portion”, “second central portion first portion”, “second central portion second portion”, “fourth inclined portion” of the present invention And “fourth end portion”.
The bent portions L2, L1, and L3 correspond to the “first bent portion”, “second bent portion”, and “third bent portion” of the present invention, respectively. The first divided portion 310A to the fourth divided portion 310D correspond to “first divided portion” to “fourth divided portion” of the present invention.

In the insulating fill 310 of this embodiment, the edge 313 on one side in the A direction is formed in a protruding shape with a central portion 313c (313c1, 313c2) protruding to one side in the A direction, and the edge 314 on the other side in the A direction. The central portion 314c (314c1, 314c2) is formed in a concave shape that is recessed to one side in the A direction.
For this reason, as shown in FIG. 11, when the insulating sheet 330 moving in the direction of the arrow is cut with the cutting blade 340 to form the plate-like insulating film 320, material loss is reduced. Can do. That is, it cut | disconnects using the cutting blade 340 provided with the blade 324 (blade part 324a-324f) of the shape corresponding to the shape of the edge 323 (323a-323e) of the insulating film 320 and the edge 324 (324a-324e). Thus, unnecessary portions (material loss) are reduced.

As shown in FIG. 12, the insulating film 310 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 film 310 is inserted such that the edge 311 is disposed on one side in the circumferential direction and the edge 312 is disposed on the other side in the circumferential direction.
In the present embodiment, in a state where the insulating film 310 is elastically deformed so that the distance between the edge portion 311 and the edge portion 312 is shortened, the edge portion 313 is formed on the end face 212 side (axis) of the first flange portion 210 of the insulator 200. (The other side in the direction), that is, from the side where the protrusions 260 and 270 are not provided. At this time, the second divided portion 310B and the third divided portion 310C of the insulating film 310 bent in a V shape are inserted between the stator windings of different phases in the slot.
When the insertion of the insulating film 310 is completed, the force applied to the insulating film 310 is released and the insulating film 310 is elastically restored. As a result, as shown in FIG. 12, the first divided portion 310A on the edge 311 side (one side in the B direction) of the insulating film 310 has two insulators 200 adjacent to each other in the circumferential direction. Of the two insulators 200 attached to each of the two teeth 121 adjacent to each other in the direction, disposed in the recess 290 of the insulator 200 disposed on one side in the circumferential direction, the edge 312 side (the other in the B direction) Side) fourth divided portion 310D is disposed in the recess 280 of the insulator 200 disposed on the other circumferential side of the two insulators 200 adjacent in the circumferential direction.
At this time, the movement of the insulating film 310 toward one side in the circumferential direction is restricted by the edge 311 coming into contact with the wall surface 293 forming the recess 290 of the insulator 200 and the fifth outer wall surface portion 274e of the protrusion 270. The Further, the position of the insulating film 310 toward the other side in the circumferential direction is. The edge 312 is regulated by coming into contact with the wall surface 283 forming the recess 280 of the insulator 200 and the fifth outer wall surface portion 264e of the protrusion 260. In addition, the movement of the insulating film 310 to one side in the axial direction is such that the first end portion 313a and the first inclined portion 313b of the edge portion 313 are aligned with the fourth outer peripheral surface portion 274d of the protrusion 270 of the insulator 200 and the third outer periphery. The second end portion 313e and the second inclined portion 313d of the edge 313 are brought into contact with the surface portion 274c or the fourth outer peripheral surface portion 264d and the third outer peripheral surface portion 264c of the protrusion 260 of the insulator 200. It is regulated by contact. Further, the movement of the insulating film 310 toward the other side in the axial direction is caused by the first end portion 324a of the edge portion 314 coming into contact with the wall surface 292 forming the concave portion 290 of the insulator 200, or by the first movement of the edge portion 314. The two end portions 324e are regulated by coming into contact with the wall surface 282 that forms the recess 280.
The movement of the insulating film 310 to one side in the circumferential direction is also restricted by the first inclined portion 313b of the edge 313 coming into contact with the third outer wall surface portion 274c of the protrusion 270, and the circumferential direction of the insulating film 310 The movement to the other side is also restricted by the second inclined portion 313d of the edge 313 coming into contact with the third outer wall surface portion 264c of the protrusion 260.
Further, a concave portion 215 that is recessed toward the through hole 240 (one side in the circumferential direction) is formed on the side surface 214 of the insulator 200 by the side surface portions 214c and 214d. Thereby, the movement of the insulating film 310 to the other side in the axial direction is restricted by the portion of the edge portion 314 of the insulating film 310 in the vicinity of the bent portion L1 coming into contact with the side surface portion 214c of the insulator 200.
Thereby, the position of the circumferential direction of the insulating film 310 which has the 1st inclination part 313b for improving insertion workability | operativity and the 2nd inclination part 313d, and an axial direction can be controlled reliably.
The arrangement position and the inclination angle of the side surface portion 214c of the insulator 200 are set so that the movement along the axial direction of the edge portion 314 of the insulating film 310 can be restricted by the side surface portion 214c.
The insulating film 310 of the present embodiment insulates the stator winding wound around the insulator 200 from the yoke 131 and the stator windings of different phases housed in the slots. Has interphase insulation function.

A second embodiment 350 of the insulating film will be described with reference to FIG.
The insulating film 350 of the second embodiment is formed by bending a plate-like insulating film 360 shown in FIG.
The insulating film 350 of the second embodiment has the same configuration as the insulating film 310 of the first embodiment except for the shape of the edge 354 on the other side in the A direction.
14 and FIG. 15, the same reference numerals are assigned to the components shown in FIG. 9 and FIG. 10, and the same reference numerals are assigned to the components other than the second digit. Show.
The edge portion 364 of the plate-like insulating film 360 of the present embodiment has a first end portion 364a, a first inclined portion 364b, a central portion, 364c, and a second inclined portion from the one side in the B direction toward the other side in the B direction. 364d and a second end portion 364e. In the present embodiment, the first end portion 364a, the central portion 364c, and the second end portion 364e extend in parallel to the B direction, and the first inclined portion and the second inclined portion 364d are in the A direction and the B direction. It extends in an inclined manner. The first end portion 364b is inclined such that the end portion on the central portion 364c side is disposed on the other side in the A direction and the other side in the B direction from the end portion on the first end portion 364a side. The second inclined portion 364d is inclined such that the end portion on the center portion 364c side is disposed on the other side in the A direction and one side in the B direction from the end portion on the second end portion 364e side.
Then, similarly to the insulating film 310 of the first embodiment, the first divided portion 350A to the fourth divided portion 350D are bent along the bent portions L1 to L3, whereby the insulating film 350 having a T-shaped cross section is formed. It is formed.
In the insulating fill 350 of the present embodiment, the edge 353 on one side in the A direction is formed in a protruding shape with the central portion 353c (the central portion first portion 353c1 and the central portion second portion 353c2) protruding to one side in the A direction. The edge portion 354 on the other side in the A direction is formed in a protruding shape in which a central portion 354c (a central portion first portion 354c1 and a central portion second portion 354c2) protrudes to the other side in the A direction.
The insulating film 350 of the present embodiment can be inserted from the edge 353 side or can be inserted from the edge 354 side. Thereby, the insertion workability | operativity of the insulating film 350 can be improved more.

FIG. 16 shows a state in which the insulating film 350 of the second embodiment is disposed between the insulator 200 and the yoke 131.
The broken line in FIG. 16 indicates that the portion of the edge 350 of the insulating film 350 in the vicinity of the bent portion L3 contacts the side surface portion 214c of the side surface 214 of the insulator 200, thereby moving the insulating film 350 to the other side in the axial direction. Indicates a state of being regulated.
Also, the alternate long and short dash line in FIG. 16 indicates that the portion near the bent portion L3 of the edge 350 of the insulating film 350 is in contact with the end on the side surface 214 side of the wall surface 292 that forms the recess 290 of the insulator 200. The state where the movement of the insulating film 350 to the other side in the axial direction is restricted is shown.

FIG. 17 shows a modified example in which the insulator 200 of the first embodiment is changed for the insulating film 350 of the second embodiment. In the modification of the insulator 200 shown in FIG. 17, the shape of the wall surface 282 that forms the recess 280 and the wall surface 292 that forms the recess 290 are different.
In the modified example, the wall surface 282 forming the recess 280 is disposed on one side in the circumferential direction from the wall surface portion 282a and the wall surface portion 282a, and extends in an inclined manner with respect to the circumferential direction and the axial direction. It has an existing wall surface part 282b. In FIG. 17, the wall surface portion 282a extends in parallel to the circumferential direction. Further, the wall surface portion 282b is inclined so that the end portion on the opposite side to the wall surface portion 282a is disposed on one side in the circumferential direction and the other side in the axial direction from the end portion on the wall surface portion 282a side.
The wall surface 292 forming the recess 290 includes a wall surface portion 292a extending along the circumferential direction, and a wall surface portion disposed on the other side in the circumferential direction from the wall surface portion 292a and extending in an inclined manner with respect to the circumferential direction and the axial direction. 292b. In FIG. 17, the wall surface portion 292a extends in parallel to the circumferential direction. The wall surface portion 292b is inclined so that the end portion on the opposite side to the wall surface portion 292a is disposed on the other circumferential side and the other axial side with respect to the end portion on the wall surface portion 292a side.
In this modified example, the movement of the insulating film 350 to one side in the axial direction is such that the first end portion 353a and the first inclined portion 353b of the edge portion 353 of the insulating film 350 are moved to the fourth outer side of the protrusion 270 of the insulator 220. The second end portion 353e and the second inclined portion 353d of the edge portion 353 are brought into contact with the wall surface portion 274d and the third outer wall surface portion 274c, or the fourth outer wall surface portion 264d and the third outer wall surface of the protrusion 260 are It is regulated by contacting the portion 264c. Further, the movement of the insulating film 350 toward the other side in the axial direction is caused by the wall surface portion of the wall surface 292 where the first end portion 354 a and the first inclined portion 354 b of the edge portion 354 of the insulating film 350 form the recess 290 of the insulator 220. By abutting 292a and the wall surface portion 292b, or by causing the second end portion 354e and the second inclined portion 354d of the edge portion 354 to abut on the wall surface portion 282a and the wall surface portion 282b of the wall surface 282 forming the recess 280. Be regulated.
Thereby, while being able to improve insertion workability | operativity, holding property can be improved more.
In addition, the side surface 214 of the modified example has side surface portions 241c and 214d extending in an inclined manner as shown in FIG. 3, and side surface portions 214a and 214b extending in the axial direction.

A third embodiment 370 of the insulating film will be described with reference to FIG.
The insulating film 370 of the third embodiment is formed by bending the plate-like insulating film 380 shown in FIG.
The insulating film 370 of the third embodiment has the same configuration as the insulating film 310 of the first embodiment except for the shape of the edge 374 on the other side in the A direction.
18 and 19, except for the edge portions 374 and 384, the same reference numerals are assigned to the components shown in FIGS. 9 and 10 except for the second digit. The components that are shown are the same components.
In the insulating film 370 of the present embodiment, the edge portion 374 has a first end portion 374a, a central portion first portion 374b, a central portion second portion 374c, and a second end from the one side in the B direction toward the other side in the B direction. A portion 374d is provided. The first end portion 374a, the central portion first portion 374b, the central portion second portion 374c, and the second end portion 374d are formed by bending the edge portion 384 of the plate-like insulating film 380 shown in FIG. It is divided by ~ L3 and extends in parallel to the B direction.
Then, similarly to the insulating film 310 of the first embodiment, the first divided portion 370A to the fourth divided portion 370D are bent along the bent portions L1 to L3, so that the insulating film 370 having a T-shaped cross section is formed. It is formed.
In the insulating fill 370 of the present embodiment, the edge portion 373 on one side in the A direction is formed in a protruding shape in which the center portion 373c (center portion first portion 373c1, center portion second portion 373c2) protrudes to the A direction one side. The edge 374 on the other side in the A direction has a shape parallel to the B direction.

The state which has arrange | positioned the insulating film 370 of 3rd Embodiment between the insulator 200 and the yoke 131 is shown by FIG.
In FIG. 20, the movement of the resin film 370 toward the other side in the axial direction is caused by the first edge portion 374a of the edge portion 374 of the resin film 370 coming into contact with the wall surface 292 forming the recess 290 of the insulator 200, or The second edge portion 374d of the edge portion 374 is regulated by contacting the wall surface 282 forming the recess 280.
When the resin film 370 of this embodiment is used, the side surface 214 of the insulator 200 is omitted from the inclined side surfaces 241c and 214d shown in FIG. 3 and extends in the axial direction. It can also be modified to have existing side portions 214a and 214b.

Next, a second embodiment 400 of the stator constituting the electric motor of the present invention will be described with reference to FIG. FIG. 21 is a perspective view of the stator 400 of the second embodiment. In the stator 100 of the first embodiment, the insulator 200 is provided with the recesses 280 and 290 that regulate the positions in the circumferential direction and the axial direction of the insulating film. However, in the stator 400 of the second embodiment, the stator core The yoke is provided with a groove in which the insulating film can move along the axial direction, and the insulator is provided with a protrusion that restricts the movement of the insulating film along the axial direction.
The stator 400 of the present embodiment is configured by a stator core 410, an insulator 500, a stator winding (not shown), and an insulating film 310, like the stator 100 of the first embodiment.

The stator core 410 has core end faces 410A and 410B on both axial sides. Further, the stator core 410 is configured as a stator core having a divided structure. In the present embodiment, the stator core 410 includes a first core member 420 having teeth 421 and a second core member 430 having yokes 431, as shown in FIG.
Similarly to the first core member 120 of the first embodiment, the first core member 420 is a state in which a plurality of teeth 421 having a tooth base portion 422, a tooth tip portion 423, and a tooth tip surface 424 are connected by a connecting portion 425. A plurality are provided along the circumferential direction.
As in the second core member 430 of the first embodiment, the second core member 430 includes a yoke 431 having a yoke outer peripheral surface 432 and a yoke inner peripheral surface 433 extending along the circumferential direction. Moreover, it has the recessed part formation surface 434a which forms the recessed part 434 in which the front-end | tip part of the teeth base 422 of the 1st core member 420 is press-fit. Further, the yoke inner peripheral surface 433 has yoke inner peripheral surface portions 433a and 433b formed between two concave portions 434 (recessed surface 434a) adjacent in the circumferential direction. The yoke inner peripheral surface portions 433a and 433b are inclined in the same manner as the yoke inner peripheral surface portions 133a and 133b of the first embodiment.
In this embodiment, the yoke 431 is formed with a groove forming surface that is recessed from the yoke inner peripheral surface 433 to the radially outer peripheral side. The groove forming surface has groove forming surface portions 435a and 435b that are recessed radially outward from the yoke inner peripheral surface portions 433a and 433b, respectively. The groove forming surface (groove forming surface portions 435a and 435b) forms a groove 435 that is recessed radially outward from the yoke inner peripheral surface 433 and that is open to the core end surfaces 410A and 410B. The groove 435 (groove forming surface) is formed between two recesses 434 adjacent in the circumferential direction (between two teeth 421 adjacent in the circumferential direction).
The groove 435 has a region (region on the other side in the circumferential direction) formed by the groove forming surface portion 435a and a region (region on one side in the circumferential direction) formed by the groove forming surface portion 435b. The edge on the one side in the circumferential direction and the edge on the other side in the circumferential direction of the insulating film are arranged in the same groove 435. For example, the edge on one side in the circumferential direction is disposed in a region formed by the groove forming surface portion 435b in the groove 435, and the edge on the other side in the circumferential direction is formed in a region formed by the groove forming surface portion 435a. Be placed.

A second embodiment 500 of the insulator attached to the teeth 421 will be described with reference to FIG. FIG. 23 is a perspective view of an insulator 500 according to the second embodiment.
The insulator 500 includes a first flange portion 510, a second flange portion 520, a body portion 530, and a through hole 540, similarly to the insulator 200 of the first embodiment.
In the insulator 500 of the present embodiment, the recesses 280 and 290 of the insulator 200 of the first embodiment are omitted, and instead, protrusions 580 and 590 that protrude from the outer peripheral surface 510A to the outer peripheral side in the radial direction are provided. . That is, except for the protrusions 560, 570, 580, and 590, the configuration is the same as that of the insulator 200 of the first embodiment. Therefore, only the protrusions 560, 570, 580 and 590 will be described below.
In the present embodiment, the outer peripheral surface 510A, the inner peripheral surface 510B, the end surface 511, the end surface 512, the side surface 513, and the side surface 514 of the first flange 510 are the “first outer peripheral surface” and “first inner peripheral surface” of the present invention, respectively. , “First end face”, “second end face”, “first side face” and “second side face”.
In addition, the outer peripheral surface 520A, the inner peripheral surface 520B, the end surface 521, the end surface 522, the side surface 523, and the side surface 524 of the second flange portion 520 are the “second outer peripheral surface”, “second inner peripheral surface”, “ It corresponds to “third end face”, “fourth end face”, “third side face”, and “fourth side face”.

The first flange 510 is provided with protrusions 550, 560, 570, 580 and 590 that protrude from the outer peripheral surface 510A to the outer peripheral side in the radial direction.
The protrusion 560 is provided in a region on the side surface 513 side (one side in the circumferential direction) on the end surface 511 side (one side in the axial direction) from the through hole 540. The protrusion 560 has outer wall surfaces 561 to 564 like the protrusion 260 of the first embodiment. Moreover, the outer wall surface 564 has the 1st outer wall surface part 564a-the 5th outer wall surface part 564e similarly to the outer wall surface 264 of 1st Embodiment.
The protrusion 570 is provided in a region on the side surface 514 side (the other side in the circumferential direction) on the end surface 511 side (the one side in the axial direction) from the through hole 540. The protrusion 570 has outer wall surfaces 571 to 574 in the same manner as the protrusion 270 of the first embodiment. Moreover, the outer wall surface 574 has the 1st outer wall surface part 574a-the 5th outer wall surface part 574e similarly to the outer wall surface 274 of 1st Embodiment.
The protrusion 580 is provided in a region on the side surface 513 side (one axial direction side) on the end face 512 side (the other axial side) from the through hole 540. The protrusion 580 has an outer wall surface 580 a extending along the circumferential direction on the side facing the protrusion 560. In the present embodiment, the outer wall surface 580a extends in parallel with the circumferential direction.
The protrusion 590 is provided in a region on the side surface 514 side (the other side in the axial direction) on the end surface 512 side (the other side in the axial direction) from the through hole 540. The protrusion 590 has an outer wall surface 590 a extending along the circumferential direction on the side facing the protrusion 570. In the present embodiment, the outer wall surface 590a extends in parallel to the circumferential direction.

The protrusions 560, 570, 580, and 590 correspond to the “first protrusion”, “second protrusion”, “third protrusion”, and “fourth protrusion” of the present invention, respectively. The projecting portion 560 and the projecting portion 580 constitute the “first position restricting portion” of the present invention, and the projecting portion 570 and the projecting portion 590 constitute the “second position restricting portion” of the present invention.
The third outer wall surface portion 564c and the fourth outer wall surface portion 564d of the protrusion 560 constitute the “first wall surface of the first position restricting portion” or “the first protrusion forming surface of the first protrusion” of the present invention. The outer wall surface 580a of the protrusion 580 constitutes the “second wall surface of the first position restricting portion” or the “second protrusion forming surface of the third protrusion” of the present invention, and the fifth outer wall surface of the protrusion 560. The portion 564e constitutes the “third wall surface of the first position restricting portion” or “the third protrusion forming surface of the first protrusion” of the present invention.
The fourth outer wall surface portion 564d of the protrusion 560 corresponds to “the first wall surface first portion of the first position restricting portion” or “the first protrusion forming surface first portion of the first protrusion” of the present invention, The third outer wall surface portion 564c of the protrusion 560 corresponds to “a first wall surface second portion of the first position restricting portion” or “a first protrusion forming surface second portion of the first protrusion” of the present invention.
The third outer wall surface portion 574c and the fourth outer wall surface portion 574d of the protrusion 570 constitute the “fourth wall surface of the second position restricting portion” or the “fourth protrusion forming surface of the second protrusion” of the present invention. The outer wall surface 590a of the protrusion 590 constitutes the “fifth wall surface of the second position restricting portion” or the “fifth protrusion forming surface of the fourth protrusion” of the present invention, and the fifth outer wall surface of the protrusion 570 The portion 574e constitutes the “sixth wall surface of the second position restricting portion” or the “sixth protrusion forming surface of the second protrusion” of the present invention.
The fourth outer wall surface portion 574d of the protrusion 570 corresponds to the “fourth wall surface first portion of the second position restricting portion” or the “fourth protrusion forming surface first portion of the second protrusion” of the present invention. The third outer wall surface portion 574c of the protrusion 570 corresponds to the “fourth wall surface second portion of the second position restricting portion” or the “second protrusion forming surface second portion of the second protrusion” of the present invention.

The operation of assembling the first core member 420 and the second core member 430 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 portion of the teeth base portion 422 of the first core member 420 is inserted into the through hole 540 of the insulator 500, and the end portion of the teeth base portion 422 protruding from the outer peripheral surface 510A of the first flange portion 510 of the insulator 500 is removed. Then, the second core member 430 is press-fitted into the recess 434 formed in the yoke 431.
At this time, the third outer peripheral surface portion 564c and the fourth outer peripheral surface portion 564d of the protrusion 560 of the insulator 500 attached to the tooth 421 of the first core member 420 and the outer wall surface 580a of the protrusion 580 are connected to the insulator 500. It is arranged at a position facing a region where the other circumferential side portion of the insulating film inserted between the yoke 431 is arranged, for example, a region of the groove 435 formed by the groove forming surface portion 435a. A region where the third outer peripheral surface portion 574c and the fourth outer peripheral surface portion 574d of 570 and the outer wall surface 490a of the protrusion 490 are disposed on one side in the circumferential direction of the insulating film, for example, a groove forming surface portion of the groove 435 It is configured to be disposed at a position corresponding to the region formed by 435b. 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 435 opened on the core end faces on both axial sides is configured to be restricted. .
In the present embodiment, the insulating films 310, 350, and 370 described above can be used.

The present invention is not limited to the configuration described in the embodiment, and various changes, additions, and deletions are possible.
In the embodiment, the insulating film folded so that the cross section has a T-shape and the plate-shaped insulating film that is not folded are described, but the shape of the insulating film is not limited to this.
The insulating film has a first end portion extending along a second direction (circumferential direction) in which at least one edge along the first direction (axial direction) intersects the first direction (axial direction); What is necessary is just to have the 1st inclination part and 2nd inclination part which extend in an inclined form with respect to a 2nd end part, a 1st direction, and a 2nd direction.
In the embodiment, the insulating film is arranged between the insulator and the yoke of the stator core, but the arrangement position of the insulating fill is not limited to this.
Although the case where the insulating film is used for a stator having an insulator (resin bobbin) attached to a tooth has been described, the insulating film of the present invention is a stator having various other structures, for example, a stator core. It can be used for a stator in which insulators (resin bobbins) are arranged on both sides in the axial direction.
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.

100, 400 Stator 110, 410 Stator core 110A, 110B, 410A, 410B Stator core end surface 120, 420 First core member 121, 421 Teeth 122, 422 Teeth base 123, 423 Teeth tip 124, 424 Teeth tip 125, 425 Connecting portion 126, 426 Caulking projection 130, 430 Second core member 131, 431 Yoke 132, 432 Yoke outer peripheral surface 133, 433 Yoke inner peripheral surface 133a, 133b, 433a, 433b Yoke inner peripheral surface portion 134, 434 Concave portion 134a, 434a Concave forming surface 136, 436 Caulking projection 200, 500 Insulator 210, 510 First flange portion 210A, 510A Outer peripheral surface (first outer peripheral surface)
210B, 510B Inner peripheral surface (first inner peripheral surface)
211, 511 End face (first end face)
212, 512 End face (second end face)
213, 513 Side surface (first side surface)
213a, 213b Side surface portions 214, 514 Side surface (second side surface)
214a, 241b, 214c, 214d, 514a, 514b, 514c Side surface portion 220, 520 Second flange 220A, 520A Outer peripheral surface (second outer peripheral surface)
220B, 520B Inner peripheral surface (second inner peripheral surface)
221 and 521 end face (third end face)
222, 522 End face (fourth end face)
223, 523 side surface (third side surface)
224, 524 side (fourth side)
224a, 224b, 524a, 524b Side surface portion 225, 525 Stepped surface 230, 530 Body portion 240, 540 Through hole 241, 242, 243, 244, 541, 542, 543, 544 Inner wall surface 241a, 242a, 243a, 244a, 541a , 542a, 543a, 544a Inclined surface 250, 550 Protrusion (guide protrusion)
251 and 551 outer wall surface (guide surface)
252 and 552 Inner wall surface 260 and 560 Projection (first projection)
261, 262, 263, 264, 561, 562, 563, 564 Outer wall surface 264a, 264b, 264c, 264d, 264e, 564a, 564b, 564c, 564d, 564e Outer wall surface portion 265, 266, 565, 566 Notch 270, 570 protrusion (second protrusion)
271, 272, 273, 274, 571, 572, 573, 574 Outer wall surface 274a, 274b, 274c, 274d, 274e, 574a, 574b, 574c, 574d, 574e Outer wall surface portion 275, 276, 575, 576 Notch 277, 577 Locking projection 278, 578 Projection 280 Concave portion (first concave portion)
281 Bottom surface 282 Wall surface (second wall surface)
283 Wall surface (third wall surface)
290 recess (second recess)
291 Bottom surface 292 Wall surface (fifth wall surface)
293 wall surface (6th wall surface)
310, 350.370 Insulating film (winding insulating member)
310A, 310B, 310C, 310D, 350A, 350B, 350C, 350D, 370A, 370B, 370C, 370D First to fourth divided parts 311, 351, 371 Edge (first edge)
312 352 372 Edge (second edge)
313, 353, 373 Edge (third edge)
314, 354, 374 Edge (4th edge)
313a, 313b, 313c1, 313c2, 313d, 313e, 314a, 314b, 314c1, 314c2, 314d, 314e, 353a, 353b, 353c1, 353c2, 353d, 353e, 354a, 354b, 354c1, 354c2, 354d, 354e, 373a, 373b, 373c1, 373c2, 373d, 373e, 374a, 374b, 374c, 374d Edge portion 320, 360, 380 Insulating film 321, 361, 381 Edge (first edge)
322, 362, 382 Edge (second edge)
323, 363, 383 Edge (third edge)
324, 364, 384 Edge (4th edge)
323a, 323b, 323c, 323d, 323e, 324a, 324b, 324c, 324d, 324e, 363a, 363b, 363c, 363d, 363e, 364a, 364b, 364c, 364d, 364e, 383a, 383b, 383c, 383d, 383e Portion 435 Groove 435a, 453b Groove forming surface 580, 590 Protrusion 580a, 590a Outer wall surface L1, L2, L3 Bending portion

Claims (8)

A winding insulation member used for a stator,
A first edge and a second edge formed on one side and the other side along the first direction and extending along a second direction intersecting the first direction; and one along the second direction A third edge and a fourth edge formed on the side and the other side and extending along the first direction;
The third edge portion is formed on the one side and the other side along the first direction from the first center portion, and a first center portion formed in the center along the first direction. A first end portion and a second end portion, a first inclined portion formed between the first central portion and the first end portion, and between the first central portion and the second end portion. Having a second inclined portion formed;
The first inclined portion is inclined such that an end portion on the first central portion side is disposed on the one side along the second direction from an end portion on the first end portion side,
The second inclined portion is inclined such that an end portion on the first central portion side is disposed on the one side along the second direction from an end portion on the second end portion side. A winding insulation member. The winding insulation member according to claim 1,
The fourth edge portion is formed on the one side and the other side along the first direction from the second center portion, with a second center portion formed at the center along the first direction. A third end portion and a fourth end portion, a third inclined portion formed between the second central portion and the third end portion, and between the second central portion and the fourth end portion. Having a fourth inclined portion formed;
The third inclined portion is inclined such that an end portion on the second central portion side is disposed on the one side along the second direction from an end portion on the third end portion side,
The fourth inclined portion is inclined such that an end portion on the second central portion side is disposed on the one side along the second direction from an end portion on the fourth end portion side. A winding insulation member. The winding insulation member according to claim 1,
The fourth edge portion is formed on the one side and the other side along the first direction from the second center portion, with a second center portion formed at the center along the first direction. A third end portion and a fourth end portion, a third inclined portion formed between the second central portion and the third end portion, and between the second central portion and the fourth end portion. Having a fourth inclined portion formed;
The third inclined portion is inclined such that an end portion on the second central portion side is disposed on the other side along the second direction from an end portion on the third end portion side,
The fourth inclined portion is inclined such that an end portion on the second central portion side is disposed on the other side along the second direction from an end portion on the fourth end portion side. A winding insulation member. The winding insulating member according to any one of claims 1 to 3,
A first bent portion that extends along the second direction through the connecting portion between the first inclined portion and the first central portion, passes through a predetermined portion of the first central portion, and extends along the second direction. The first edge portion and the second bent portion extending through the second bent portion and the connecting portion between the first central portion and the second inclined portion and extending along the second direction. A first divided portion defined by the first bent portion, a second divided portion defined by the first bent portion and the second bent portion, and a third defined by the second bent portion and the third bent portion. Divided into a divided portion and a fourth divided portion defined by the third bent portion and the second edge,
The second divided portion and the third divided portion are bent in a V shape along the second bent portion, and the first divided portion is opened in the V shape along the first bent portion. A winding insulation member, wherein the fourth divided portion is bent to the opposite side of the V-shaped opening along the third bent portion. A stator comprising a stator core, an insulator, a stator winding, and a winding insulation member,
The stator using the winding insulation member according to any one of claims 1 to 4 as the winding insulation member. The stator according to claim 5,
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 stator, wherein the winding insulating member is disposed between the insulator and the yoke. The stator according to claim 6, wherein
The stator core is composed of a first core member having the plurality of teeth and a second core material 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 5 to 7 as the stator.

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