JP6760746B2 - Insulation, stator and motor - Google Patents

Description

The present invention relates to an insulating member attached to the teeth when the stator winding is wound around the teeth of the stator core by a centralized winding method.

It is equipped with a stator and a rotor, and the stator is an electric motor with a stator core having a yoke and teeth and a stator winding wound around the teeth, and the stator windings are wound around the teeth in a centralized winding manner. Electric motors (called "concentrated winding motors") are known. In this case, the stator winding is wound around an insulating member mounted on the tooth.
Further, in an electric motor in which the stator winding is wound around the teeth by a centralized winding method, in order to increase the number of turns of the stator winding (increase the space factor), the stator core is composed of a plurality of divided cores. A stator core (referred to as a "split structure stator core") is used.
An electric motor using a stator core having a split structure is disclosed in, for example, Patent Document 1. In the electric motor having a split structure disclosed in Patent Document 1, the stator core is composed of a first core member having a tooth and a second core member having a yoke. Further, the insulating member has a through hole into which the tooth can be inserted. By inserting the tooth into the through hole of the insulating member, the insulating member is attached to the tooth. Then, the stator core is formed by assembling the first core member and the second core member while the insulating member is attached to the tooth.

JP-A-2007-259514

The insulating member disclosed in Patent Document 1 has a limit in improving workability when manufacturing a stator or an electric motor having a stator core having a divided structure.
The present invention has been devised in view of these points, and an object of the present invention is to provide a technique capable of improving workability when manufacturing a stator or an electric motor having a stator core having a divided structure. To do.

The present invention is configured as follows. In the following, the descriptions "axial direction", "diameter direction", and "circumferential direction" refer to "axial direction", "diameter direction", and "circumferential direction" when the insulating member is mounted on the teeth of the stator core. Means.

The first invention relates to an insulating member.
The insulating member of the present invention is attached to the teeth of the stator core. The teeth of the stator core are the teeth base extending in the radial direction from the yoke extending in the circumferential direction and the teeth base extending in the radial direction in the radial direction of the teeth base when viewed in a cross section perpendicular to the axial direction. It is provided on the circumferential side and has a tooth tip extending along the circumferential direction. Preferably, the insulating member of the present invention is attached to the teeth when the stator winding is wound around the teeth of the stator core having a split structure by a centralized winding method.
The insulating member of the present invention is provided at a body portion having a through hole into which a tooth base is inserted and at the end portions of the body portion on the inner peripheral side in the radial direction and the outer peripheral side in the radial direction, and the first portion protruding from the body portion. It has a collar and a second collar. The first flange portion and the second flange portion are preferably formed as a plate-like member extending from the body portion along the axial direction and the circumferential direction.
The through hole is arranged on one side in the axial direction and the other side in the axial direction with the tooth base inserted into the through hole, and extends along the radial and circumferential directions of the first inner peripheral surface and the second through hole. It is formed by an inner peripheral surface and a third inner peripheral surface and a fourth inner peripheral surface which are arranged on one side in the circumferential direction and the other side in the circumferential direction and extend along the radial direction and the axial direction .
The first inner peripheral surface is a first inclined surface extending in a state of being inclined with respect to the radial direction when viewed in a cross section along the radial direction when the tooth base is inserted into the through hole, and a first. It is arranged on the inner peripheral side in the radial direction from the inclined surface of, and is arranged on the inner peripheral surface on the inner peripheral side in the radial direction extending in a state of being inclined with respect to the radial direction, and on the outer peripheral side in the radial direction from the first inclined surface. It has a first outer peripheral side inner peripheral surface extending parallel to the radial direction. The second inner peripheral surface is a second inclined surface extending in a state of being inclined with respect to the radial direction when viewed in a cross section along the radial direction when the tooth base is inserted into the through hole, and a second. The second inner peripheral surface, which is arranged on the inner peripheral side in the radial direction from the inclined surface and extends in a state of being inclined with respect to the radial direction, and the outer peripheral side in the radial direction from the second inclined surface. It has a second outer peripheral inner peripheral surface extending parallel to the radial direction. The first inner peripheral side inner peripheral surface and the second inner peripheral side inner peripheral surface are preferably formed as tapered surfaces.
In the first inclined surface and the second inclined surface, the distance between the first inclined surface and the second inclined surface along the axial direction decreases from the radial inner peripheral side to the radial outer peripheral side. Is formed to do.
The first inner peripheral side inner peripheral surface and the second inner peripheral side inner peripheral surface are the distances along the axial direction between the first inner peripheral side inner peripheral surface and the second inner peripheral side inner peripheral surface. From the radial inner peripheral side toward the connecting portion between the first inner peripheral side inner peripheral surface and the first inclined surface and the connecting portion between the second inner peripheral side inner peripheral surface and the second inclined surface. It is formed so as to decrease, and constitutes a guide surface that guides the insertion of the tooth base into the through hole.
The third inner peripheral surface is a third inclined surface extending in a state of being inclined with respect to the radial direction when viewed in a cross section perpendicular to the axial direction when the tooth base is inserted into the through hole, and a third. It is arranged on the inner peripheral side in the radial direction from the inclined surface of the above, and has a third inner peripheral surface on the inner peripheral side extending in a state of being inclined with respect to the radial direction. The fourth inner peripheral surface has a fourth inclined surface extending in a state of being inclined with respect to the radial direction when viewed in a cross section perpendicular to the axial direction when the tooth base is inserted into the through hole, and a fourth. It is arranged on the inner peripheral side in the radial direction from the inclined surface of the above, and has a fourth inner peripheral surface on the inner peripheral side extending in a state of being inclined with respect to the radial direction. The third inner peripheral surface and the fourth inner peripheral surface are preferably formed as tapered surfaces.
In the third inclined surface and the fourth inclined surface, the distance between the third inclined surface and the fourth inclined surface along the circumferential direction decreases from the radial inner peripheral side to the radial outer peripheral side. Is formed to do.
The third inner peripheral surface and the fourth inner peripheral surface are the intervals along the circumferential direction between the third inner peripheral surface and the fourth inner peripheral surface. From the radial inner peripheral side toward the connecting portion between the third inner peripheral side inner peripheral surface and the third inclined surface and the connecting portion between the fourth inner peripheral side inner peripheral surface and the fourth inclined surface. It is formed so as to decrease, and constitutes a guide surface that guides the insertion of the tooth base into the through hole.
In the present invention, the tooth base can be easily inserted into the through hole of the insulating member. Further, the insulating member is attached to the tooth in a state where movement along the axial direction and the circumferential direction with respect to the tooth base is restricted. Further, the insulating member in which the tooth base is inserted into the through hole can be held parallel to the surface on one side in the axial direction and the surface on the other side in the axial direction (including "substantially parallel"), and the tooth base can be held. It is possible to prevent the insulating member from being displaced with respect to the axial direction. This makes it possible to improve workability when manufacturing a stator or an electric motor having a stator core having a split structure.
In a different embodiment of the first invention, the third inner peripheral surface is arranged on the outer peripheral side in the radial direction from the third inclined surface and has a third inner peripheral surface on the inner peripheral side extending in parallel with the radial direction. The fourth inner peripheral surface is arranged on the outer peripheral side in the radial direction from the fourth inclined surface, and has a fourth inner peripheral surface on the inner peripheral side extending in parallel with the radial direction.
In this embodiment, the insulating member in which the tooth base is inserted into the through hole can be held parallel to the surface on one side in the circumferential direction and the surface on the other side in the circumferential direction (including "substantially parallel"). It is possible to prevent the insulating member from being displaced with respect to the tooth base in the circumferential direction. This makes it possible to improve workability when manufacturing a stator having a stator core having a split structure.
In a different embodiment of the first invention, the end surface on the radial outer peripheral side of the second flange portion has a first protrusion on one side in the axial direction and one end surface on one side in the circumferential direction from the third inner peripheral surface. A second protrusion is formed on one side in the axial direction and at the end on the other side in the circumferential direction from the fourth inner peripheral surface.
In a different embodiment of the first invention, a third protrusion is formed on the radial outer peripheral end surface of the second flange portion at a position on the other side in the axial direction and axially overlapping the second inner peripheral surface. It is formed.
In a different form of the first invention, the first flange portion and the second flange portion have a quadrangular outer circumference, and at least one corner portion is cut out.
In the present embodiment, a space is formed between the first flange portions and the second flange portions of the insulating members adjacent to each other in the circumferential direction by the corner portions having a shape in which the square corner portions are cut out. As a result, it is not necessary to form holes in the first flange portion and the second flange portion for passing the binding member for binding the stator windings.

The second invention relates to a stator. The stator of the present invention includes a stator core, an insulating member, and a stator winding. The stator core has a yoke extending along the circumferential direction and a tooth extending along the radial direction when viewed in a cross section perpendicular to the axial direction, and the tooth is inward along the radial direction from the yoke. It has a teeth base extending on the circumferential side and a teeth tip portion provided on the inner peripheral side in the radial direction of the teeth base and extending along the circumferential direction. The insulating member is attached to the tooth. The stator winding is wound around an insulating member mounted on the tooth. As a method of winding the stator winding, a method of winding the stator winding around the insulating member with the insulating member attached to the tooth, or a method of winding the stator winding around the insulating member and the insulating member. Can be used by attaching the tooth to the tooth. Then, as the insulating member, any of the above-mentioned insulating members is used.
The present invention has the same effect as the above-mentioned insulating member.
In a different embodiment of the second invention, the stator core is composed of a first core member having teeth and a second core member having a yoke.
In this embodiment, by having the stator core having a divided structure, the effect of the above-mentioned insulating member can be effectively achieved.
In a different embodiment of the second invention, the stator winding has a winding start portion arranged on the radial inner peripheral side and a winding end portion arranged on the radial outer peripheral side.
In this embodiment, the stator winding is wound so as to start winding from the radial inner peripheral side and end winding on the radial outer peripheral side. As a result, it is possible to prevent a mistake in the connection of the stator winding and a mistake in the connection between the stator winding and the bus bar.
In a different embodiment of the second invention, the length of the second core member along the axial direction is set shorter than the length of the first core member along the axial direction.
In this embodiment, the electromagnetic steel sheet constituting the second core member can be reliably assembled with the electromagnetic steel sheet constituting the first core member. As a result, it is possible to prevent a part of the electromagnetic steel sheet constituting the second core member from slipping or falling off.

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. Then, one of the above-mentioned stators is used as the stator.
The present invention has the same effect as any of the stators described above.

By using the insulating member of the present invention, it is possible to improve workability when manufacturing a stator or an electric motor having a stator core having a divided structure.

It is a figure which looked at one Embodiment of the stator of this invention from the axial direction . It is a figure which shows the schematic structure of the stator core used in one Embodiment of the stator of this invention. It is a perspective view which looked at 1st Embodiment of the insulating member of this invention from one direction. It is a perspective view which looked at the 1st Embodiment of the insulating member of this invention from a different direction. It is a figure seen from the direction of the arrow V of FIG. FIG. 3 is a sectional view taken along line VI-VI of FIG. FIG. 3 is a sectional view taken along line VII-VII of FIG. It is a figure explaining the operation which attaches 1st Embodiment of the insulating member of this invention to a tooth. It is a figure explaining the operation of assembling the 1st core member and the 2nd core member. It is a perspective view of the part indicated by the arrow X of FIG. FIG. 5 is a cross-sectional view taken along the line XI-XI of FIG. It is a cross-sectional view taken along the line XII-XII of FIG. It is sectional drawing of the 2nd Embodiment of the insulating member of this invention. It is sectional drawing of the 2nd Embodiment of the insulating member of this invention. It is sectional drawing of the 3rd Embodiment of the insulating member of this invention. It is a perspective view of the 4th Embodiment of the insulating member of this invention. It is a partial perspective view of the stator of another embodiment which used the 4th Embodiment of the insulating member of this invention. It is sectional drawing of the stator of another embodiment which used the 4th Embodiment of the insulating member of this invention. It is sectional drawing of the stator of another embodiment which used the 4th Embodiment of the insulating member of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the present specification, the description "axial direction" refers to the stator core center line (rotor is rotatably supported with respect to the stator) passing through the center point P (see FIGS. 1 and 2) of the stator core. In this state, the direction of the rotor center line passing through the rotor center point of rotation) is shown. The description "circumferential direction" indicates the circumferential direction centered on the center point P of the stator core when viewed in a cross section perpendicular to the axial direction. The description "diameter" indicates a direction passing through the center point P of the stator core when viewed in a cross section perpendicular to the axial direction.
Regarding the insulating member, the description of "axial direction", "circumferential direction", and "diameter direction" means that the insulating member is attached to the teeth of the stator core (specifically, the teeth base). It represents "axial direction", "circumferential direction", and "diameter direction".

FIG. 1 shows an embodiment of the stator of the present invention. Note that FIG. 1 is a view of the stator 10 of the present embodiment as viewed from the axial direction .
The stator 10 is composed of a stator core 20, an insulating member 100, and a stator winding 50.

The stator core 20 is configured as a stator core having a divided structure. In the present embodiment, the stator core 20 is composed of a first core member 30 and a second core member 40, as shown in FIG. Note that FIG. 2 shows a cross-sectional view of the first core member 30 and the second core member 40 perpendicular to the axial direction.
The first core member 30 (referred to as an “inner core”) is composed of a laminated body in which a plurality of electromagnetic steel plates are laminated, extends along the radial direction, and is arranged along the circumferential direction. It has a teeth 31. The teeth 31 has a teeth base 32 and a teeth tip 33. The tooth tip 33 of the teeth 31 adjacent in the circumferential direction is connected by a connecting portion 35.
The second core member 40 (referred to as "outer core") is composed of a laminated body in which a plurality of electromagnetic steel plates are laminated, and has a yoke 41 extending along the circumferential direction. A recess 42 is formed on the inner peripheral surface of the yoke 41 to which an end portion of the tooth base 32 of the first core member 30 on the outer peripheral side in the radial direction can be fitted.
The stator core 20 press-fits (or burns) the end of the tooth base 32 of the first core member 30 on the side opposite to the tooth tip 33 (diameter outer peripheral side) into the recess 42 of the second core member 40. It is formed by fitting (fitting or cooling fitting). That is, the stator core 20 has a yoke 41 extending along the circumferential direction and a plurality of teeth 31 extending along the radial direction when viewed in a cross section perpendicular to the axial direction, and the teeth 31 has a yoke. It has a teeth base portion 32 extending from 41 to the inner peripheral side along the radial direction, and a teeth tip portion 33 provided on the radial inner peripheral side of the teeth base portion 32 and extending along the circumferential direction.
A tooth tip surface 34 is formed on the radial inner peripheral side of the tooth tip 33, and the rotor insertion space 20a into which a rotor (not shown) is inserted is formed by the tooth tip surface 34. The motor is composed of the stator 10 and the rotor inserted into the rotor insertion space 20a.

The stator winding 50 is wound around the insulating member 100 mounted on the teeth 31. That is, the stator winding 50 is wound around the teeth 31 by a centralized winding method. As a method of winding the stator winding 50, a method of winding the stator winding 50 around the insulating member 10 with the insulating member 100 attached to the tooth 31 or a method of winding the stator winding 50 around the insulating member 100. A method of mounting the insulating member 100 on the teeth 31 in a state where the coil is wound can be used.
In the present embodiment, the stator winding 50 is wound so as to start winding from the radial inner peripheral side and end winding on the radial outer peripheral side. That is, as shown in FIG. 1, the winding start portion 50a of the stator winding 50 is arranged on the radial inner peripheral side, and the winding end portion 50b is arranged on the radial outer peripheral side.
By arranging the winding start portion 50a and the winding end portion 50b of the stator winding 50 apart in the radial direction, it is possible to prevent a connection error of the stator winding 50. For example, when one end of the stator winding 50 of each phase is connected in common to form a neutral point and the other end is connected to an external power source, it is on the inner peripheral side in the radial direction. The winding start portion 50a of the stator winding 50 of each phase is connected in common, and the winding end portion 50b of the stator winding 50 of each phase arranged on the outer peripheral side in the radial direction is externally connected. All you have to do is pull it out. Further, when the winding start portion 50a and the winding end portion 50b of the stator winding 50 of each phase are connected to the bus bar, it is possible to prevent a connection error. For example, the winding start portion 50a of the stator winding 50 of each phase, which is arranged on the radial inner peripheral side, and the connecting portion of the bus bar provided on the radial inner peripheral side are connected, and the radial outer peripheral side is connected. The winding end portion 50b of the stator winding 50 of each phase and the connecting portion provided on the outer peripheral side in the radial direction of the bus bar may be connected.

The configuration of the insulating member 100 will be described with reference to FIGS. 3 to 7. FIG. 3 is a perspective view of the insulating member 100 viewed from one direction, and FIG. 4 is a perspective view of the insulating member 100 viewed from different directions. 5 is a view seen from the direction indicated by the arrow V in FIG. 3, FIG. 6 is a sectional view taken along line VI-VI of FIG. 3 (cross-sectional view taken along the radial direction), and FIG. 7 is FIG. VII-VII line sectional view (cross-sectional view perpendicular to the axial direction).

The insulating member 100 is made of a material having insulating properties, and in the present embodiment, a resin having insulating properties (called a "resin bobbin"). The insulating member 100 has a body portion 160 and collar portions 110 and 150.
The body portion 160 is formed with a through hole 170 penetrating in the radial direction. The teeth base 32 of the teeth 31 is inserted into the through hole 170.
The through hole 170 is formed by an upper surface 171 and a lower surface 172, a left side surface 173, and a right side surface 174. In the present embodiment, as shown in FIG. 8, when the tooth base 32 of the teeth 31 is inserted into the through hole 170, the upper surface 171 and the lower surface 172, the left side surface 173 and the right side surface 174 of the through hole 170 are formed. The upper surface 32a, the lower surface 32b, the left side surface 32c, and the right side surface 32d of the tooth base 32 are inserted so as to face each other.
As shown in FIGS. 5 and 6, the upper surface 171 is arranged on the inner peripheral side (flame portion 150 side) in the radial direction from the inclined surface 171b and the inclined surface 171b when viewed in a cross section along the radial direction. It has an inner peripheral surface 171a on the inner peripheral side and an inner peripheral surface 171c on the outer peripheral side arranged on the outer peripheral side (flame portion 110 side) in the radial direction from the inclined surface 171b. Similarly, the lower surface 172 also has an inner peripheral surface 172a on the inner peripheral side, an inclined surface 172b, and an inner peripheral surface 172c on the outer peripheral side.
As shown in FIGS. 5 and 7, the left side surface 173 is arranged on the inner peripheral side (flame portion 150 side) in the radial direction from the inclined surface 173b and the inclined surface 173b when viewed in a cross section perpendicular to the axial direction. It has an inner peripheral surface 173a on the inner peripheral side and an inner peripheral surface 173c on the outer peripheral side arranged on the outer peripheral side (flame portion 110 side) in the radial direction from the inclined surface 173b. Similarly, the right side surface 174 also has an inner peripheral side inner peripheral surface 174a, an inclined surface 174b, and an outer peripheral side inner peripheral surface 174c.

The inclined surfaces 171b, 172b, 173b, and 174b are deviation prevention surfaces that prevent the insulation member 100 from being displaced with respect to the tooth base 32.
In the present embodiment, the inclined surface 171b of the upper surface 171 and the inclined surface 172b of the lower surface 172 are inclined so that the distance between them along the axial direction decreases from the inner peripheral side in the radial direction to the outer peripheral side in the radial direction. There is. For example, as shown in FIG. 6, the inclination angle of the inclined surface 171b with respect to the radial direction is set to α, and the inclination angle of the inclined surface 172b with respect to the radial direction is set to −α. The inclined surfaces 171b and 172b have a minimum value of the distance along the axial direction of both of them along the axial direction of the tooth base 32 (the upper surface 32a and the lower surface 32b of the tooth base 32 shown in FIG. 8). It is formed to be smaller than the length between). This makes it possible to prevent the insulating member 100 from being displaced in the axial direction.
Further, the inclined surface 173b of the left side surface 173 and the inclined surface 174b of the right side surface 174 are inclined so that the distance between them along the circumferential direction decreases from the radial inner peripheral side to the radial outer peripheral side. .. For example, as shown in FIG. 7, the inclination angle of the inclined surface 173b with respect to the radial direction is set to β, and the inclination angle of the inclined surface 174b with respect to the radial direction is set to −β. As for the inclined surfaces 173b and 174b, the minimum value of the distance along the circumferential direction of both is the width of the teeth base 32 (the length between the left side surface 32c and the right side surface 32d of the teeth base 32 shown in FIG. 9). It is formed so as to be equal to or smaller than N). As a result, it is possible to prevent the insulating member 100 from being displaced in the circumferential direction.
The tilt angle α and the tilt angle β may be different angles or may be the same angle. The inclination angle of the inclined surface 171b and the inclination angle of the inclined surface 172b may be different angles. The inclination angle of the inclined surface 173b and the inclination angle of the inclined surface 174b may be different angles.

The inner peripheral surfaces 171a, 172a, 173a, and 174a on the inner peripheral side are guide surfaces that guide the radial outer peripheral end of the tooth base 32 into the through hole 170 when the tooth base 32 is inserted into the through hole 170. is there.
In the present embodiment, the inner peripheral surface 171a of the upper surface 171 and the inner peripheral surface 172a of the lower surface 172 are spaced apart from the radial inner peripheral side to the radial outer peripheral side (inner circumference). It is formed on a tapered surface that decreases toward the connecting portion between the side inner peripheral surface 171a and the inclined surface 171b and the connecting portion between the inner peripheral side inner peripheral surface 172a and the inclined surface 172b).
Similarly, the inner peripheral side inner peripheral surface 173a of the left side surface 173 and the inner peripheral side inner peripheral surface 174a of the right side surface 174 are spaced apart from the radial inner peripheral side toward the radial outer peripheral side. It is formed on a tapered surface that decreases.

The outer peripheral side inner peripheral surfaces 171c, 172c, 173c, and 174c are holding surfaces that stably hold the insulating member 100 in which the end portion of the tooth base portion 32 is inserted into the through hole 170 with respect to the end portion of the tooth base portion 32. ..
In the present embodiment, the outer peripheral side inner peripheral surface 171c of the upper surface 171 and the outer peripheral side inner peripheral surface 172c of the lower surface 172 are formed so as to extend in parallel in the radial direction (including "substantially parallel"). That is, the distance between the outer peripheral inner peripheral surfaces 171c and 172c along the axial direction is set to be equal (including "substantially equal") along the radial direction. The outer peripheral side inner peripheral surfaces 171c and 172c are formed so that the distance between them along the axial direction is smaller than the length along the axial direction of the tooth base 32. As a result, the insulating member 100 is held parallel to (including "substantially parallel") the upper surface 32a and the lower surface 32b of the tooth base 32.
The outer peripheral side inner peripheral surface 173c of the left side surface 173 and the outer peripheral side inner peripheral surface 174c of the right side surface 174 are formed so as to extend parallel to the circumferential direction (including "substantially parallel"). That is, the distance between the outer peripheral inner peripheral surfaces 173c and 174c along the circumferential direction is set to be equal (including "substantially equal") along the radial direction. The outer peripheral side inner peripheral surfaces 173c and 174c are formed so that the distance between them along the circumferential direction is equal to or smaller than the width N (see FIG. 9) of the tooth base 32. As a result, the insulating member 100 is held parallel to (including "substantially parallel") the left side surface 32c and the right side surface 32d of the tooth base 32.

The collars 110 and 150 are provided at the end of the body 160 on the yoke 41 side (diameter outer circumference side) and the end of the tooth tip 33 side (diameter inner circumference side), and protrude from the body 160. .. In the present embodiment, the collar portions 110 and 150 are formed as plate-like members having a quadrangular outer peripheral portion extending from the body portion 160 along the axial direction and the circumferential direction. As a result, the body portion 160 and the flange portions 110 and 150 form a space around which the stator winding 50 is wound.

Further, a protrusion is provided on the end surface 110A on the outer peripheral side in the radial direction of the flange portion 110. In the present embodiment, the protrusions 120 and 130 are provided at the upper end of the end face 110A in the axial direction, and the protrusions 140 are provided at the lower end in the axial direction.
The protrusion 120 can be brought into contact with the axially lower side (the side facing the protrusion 140) with the axially upper end surface 40A (see FIGS. 10 to 12) of the second core member 40 (yoke 41). It has a contact surface 121. Further, on the outer peripheral side, an outer peripheral surface 122 having a shape in which a quadrangular corner portion is cut out (for example, an R surface shape or a linear chamfered shape) is provided. Further, the side surface 123 is provided on the right side in the circumferential direction (the side facing the protrusion 130). The protrusion 120 (specifically, the side surface 123 of the protrusion 120) is formed at a position separated from the left side surface 173 forming the through hole 170 on the left side in the circumferential direction (one side in the circumferential direction).
The protrusion 130 has a contact surface 131 on the lower side in the axial direction (the side facing the protrusion 140) to which the end surface 40A on the upper side in the axial direction of the second core member 40 (yoke 41) can come into contact. There is. Further, it has an outer peripheral surface 132 having a shape (R surface shape, chamfered shape in a straight line) in which a quadrangular corner portion is cut out. Further, the side surface 133 is provided on the left side in the circumferential direction (the side facing the protrusion 120). The protrusion 130 (specifically, the side surface 133 of the protrusion 130) is formed at a position separated from the right side surface 174 forming the through hole 170 on the right side in the circumferential direction (the other side in the circumferential direction).
The protrusion 140 is formed at a position overlapping the lower surface 172 forming the through hole 170 in the axial direction. The protrusion 140 has an upper surface 141 on the upper side in the axial direction (the side facing the protrusions 120 and 130). Preferably, the upper surface 141 is formed so as to be flush with the lower surface 172 (specifically, the outer peripheral inner peripheral surface 172c of the lower surface 172) forming the through hole 170. Of course, the upper surface 141 can be formed at a position separated from the lower surface 172 (outer peripheral side inner peripheral surface 172c) in the axial direction. Further, on the lower side in the axial direction of the protrusion 140, when the end of the tooth base 32 inserted into the through hole 170 is press-fitted into the recess 42 of the second core member 40, the end of the tooth base 32 is recessed. A guide surface 142 for guiding is formed in the 42. In the present embodiment, the guide surface 142 is formed on a tapered surface protruding from the lower side in the axial direction toward the upper side in the axial direction toward the outer peripheral side in the radial direction.
In the present embodiment, the protrusion 140 is formed so that the entire guide surface 142 overlaps the lower surface 172 along the axial direction (so that the protrusion 140 is arranged at a position distant from the lower surface 172 in the axial direction). However, at least a part of the guide surface 142 may be formed so as to overlap the lower surface 172 along the axial direction.
The protrusions 120, 130, 140 are formed with recesses 120a, 130a, 140a having an opening on the outer peripheral side in the radial direction. By forming the recesses 120a, 130a, 140a in the protrusions 120, 130, 140, the amount and weight of the resin forming the insulating member 100 can be reduced.
The corner portions 151, 152, 153, and 154 of the outer peripheral portion of the flange portion 150 have a shape in which the square corner portion is cut out.

In the present embodiment, the upper surface 171 and the lower surface 172, the left side surface 173 and the right side surface 174 forming the through hole 170 are the "first inner peripheral surface arranged on one side in the axial direction" and the "axial direction", respectively. Corresponds to "the second inner peripheral surface arranged on the other side", "the third inner peripheral surface arranged on one side in the circumferential direction", and "the fourth inner peripheral surface arranged on the other side in the circumferential direction". ..
Further, the inner peripheral side inner peripheral surface 171a, the inclined surface 171b, and the outer peripheral side inner peripheral surface 171c of the upper surface 171 are the "first inner peripheral side inner peripheral surface", the "first inclined surface", and the "first inclined surface" of the present invention, respectively. Corresponding to the "first outer peripheral side inner peripheral surface", the inner peripheral side inner peripheral surface 172a, the inclined surface 172b, and the outer peripheral side inner peripheral surface 172c of the lower surface 172 are each the "second inner peripheral side inner peripheral surface" of the present invention. , "Second inclined surface", "second outer peripheral side inner peripheral surface", and the inner peripheral side inner peripheral surface 173a, inclined surface 173b, and outer peripheral side inner peripheral surface 173c of the left side surface 173 are each main. Corresponding to the "third inner peripheral surface", "third inclined surface", and "third outer peripheral inner peripheral surface" of the present invention, the inner peripheral side inner peripheral surface 174a of the right side surface 174, the inclined surface The 174b and the outer peripheral side inner peripheral surface 174c correspond to the "fourth inner peripheral side inner peripheral surface", the "fourth inclined surface", and the "fourth outer peripheral side inner peripheral surface" of the present invention, respectively.
Further, the collar portion 150 corresponds to the "first collar portion provided at the end portion on the radial inner peripheral side of the body portion" of the present invention, and the collar portion 110 corresponds to the "diameter direction of the body portion" of the present invention. It corresponds to the "second collar portion provided on the outer peripheral side".
Further, the protrusion 120 corresponds to the "first protrusion formed at the end on one side in the axial direction" of the present invention, and the protrusion 130 is formed at the "end on one side in the axial direction" of the present invention. Corresponding to the "second protrusion", the protrusion 140 corresponds to the "third protrusion formed at the other end in the axial direction" of the present invention.

Next, the operation of assembling the first core member 30 and the second core member 40 will be described with reference to FIGS. 8 and 9.
First, the insulating member 100 is attached to the teeth 31 of the first core member 30. In the present embodiment, the end portion of the tooth base portion 32 of the tooth 31 is inserted into the through hole 170 of the insulating member 100 from the flange portion 150 side (diameter inner peripheral side). At this time, the end portion of the tooth base 32 is placed in the through hole 170 by the inner peripheral side inner peripheral surfaces 171a, 172a, 173a and 174a of the upper surface 171 and the lower surface 172, the left side surface 173 and the right side surface 174 forming the through hole 170. Be guided.
When the end of the tooth base 32 is further inserted into the through hole 170, the upper surface 32a and the lower surface 32b of the end of the tooth base 32 come into contact with the inclined surfaces 171b and 172b of the upper surface 171 and the lower surface 172 forming the through hole 170. The insulating member 100 is restricted from moving along the axial direction with respect to the tooth base 32. Further, the left side surface 32c and the right side surface 32d of the end portion of the tooth base portion 32 abut on the inclined surfaces 173b and 174b of the left side surface 173 and the right side surface 174 forming the through hole 170, and the insulating member 100 is peripheral to the tooth base portion 32. Movement along the direction is restricted.
When the end of the tooth base 32 is further inserted into the through hole 170, the upper surface 32a and the lower surface 32b of the end of the tooth base 32 form the through hole 170 on the outer peripheral side inner peripheral surfaces 171c and 172c of the upper surface 171 and the lower surface 172. The insulating member 100 is held in parallel (including "substantially parallel") with the upper surface 32a and the lower surface 32b of the tooth base 32 in the axial direction. Further, the left side surface 32c and the right side surface 32d of the end portion of the tooth base 32 abut on the outer peripheral side inner peripheral surfaces 173c and 174c of the left side surface 173 and the right side surface 174 forming the through hole 170, and the insulating member 100 is in the circumferential direction. With respect to, the teeth base 32 is held parallel to the left side surface 32c and the right side surface 32d (including "substantially parallel").
As a result, when assembling the first core member 30 and the second core member 40 with the insulating member 100 attached to the teeth 31 (specifically, the teeth base 32), the teeth 31 of the insulating member 100 (specifically, the teeth 31 (specifically, the teeth base 32)) It is possible to prevent the tooth base 32) from being displaced or falling off from the tooth 31.

Then, the stator winding 50 is wound with the insulating member 100 attached to the teeth 31 of the first core member 30, that is, with the end of the teeth base 32 inserted into the through hole 170 of the insulating member 100. .. In the present embodiment, the stator winding 50 is wound around the space formed by the body portion 160 and the flange portions 110 and 150 of the insulating member 100 covering the tooth base portion 32.
At this time, as described above, the winding starts from the radial inner peripheral side and ends on the radial outer peripheral side, that is, the winding start portion 50a is arranged on the radial inner peripheral side, and the winding end portion 50b is in the radial direction. It is preferable to wind the stator winding 50 so as to be arranged on the outer peripheral side. As a result, it is possible to prevent an error in the connection of the stator winding 50 and an error in the connection between the stator winding 50 and the bus bar .
Regarding the mounting of the insulating member 100 and the winding of the stator winding 50, the stator winding 50 is placed in the space formed by the body portion 160 and the flange portions 110 and 150 of the insulating member 100. A method of mounting the insulating member 100 on the teeth 31 of the first core member 30 in the wound state can also be used.

Then, in a state where the insulating member 100 is mounted on the teeth 31 and the stator winding 50 is wound, the first core member 30 and the second core member 40 are assembled to form the stator core 20. .. In the present embodiment, the end portion of the tooth base 32, which is inserted into the through hole 170 of the insulating member 100 and protrudes from the end surface 110A on the radial outer peripheral side of the collar portion 110, is attached to the yoke 41 of the second core member 40. The first core member 30 and the second core member 40 are assembled by press-fitting into the recess 42 formed on the inner peripheral surface.

FIGS. 10 to 12 show a stator 10 having a stator core 20 and a stator winding 50 formed by assembling a first core member 30 and a second core member 40. 10 is a perspective view of the portion indicated by the arrow X in FIG. 1, and FIG. 11 is a sectional view taken along line XI-XI (cross-sectional view along the radial direction) of FIG. Is a cross-sectional view taken along the line XII-XII of FIG. 1 (cross-sectional view taken along the circumferential direction).

Here, if the length along the axial direction of the second core member 40 is longer than the length along the axial direction of the first core member 30, a part of the electromagnetic steel plate constituting the second core member 40 The tip of the tooth base 32 of the electromagnetic steel plate constituting the first core member is not press-fitted into the recess 42. That is, a part of the electromagnetic steel plate constituting the second core member 40 cannot be assembled with the electromagnetic steel plate constituting the first core member 30. In this case, a part of the electromagnetic steel plate constituting the second core member 40, which is not assembled with the electromagnetic steel plate constituting the second core member 40, may be displaced or fall off.
In the present embodiment, as shown in FIG. 11, the length L1 along the axial direction of the second core member 40 (yoke 41) is set in the axial direction of the first core member 30 (teeth 31). The length along the line is set shorter than L2 (L1 <L2). As a result, all of the electrical steel sheets constituting the second core member 40 can be assembled with the electrical steel sheets constituting the first core member 30, and a part of the electrical steel sheets constituting the second core member 40 is displaced. And can be prevented from falling off. Since the electromagnetic steel plate constituting the first core member 30 is inserted into the through hole 170 of the insulating member 100, there is no risk of slippage or falling off.

Further, in the present embodiment, the end portion of the tooth base 32 of the first core member 30 is press-fitted into the recess 42 of the second core member 40 (the first core member 30 and the second core member 40 are assembled). At this time, the axially upper end surface 40A of the second core member 40 is attached to at least one of the contact surface 121 of the protrusion 120 and the contact surface 131 of the protrusion 130 provided on the flange 110 of the insulating member 100. The end of the tooth base 32 of the first core member 30 is press-fitted into the recess 42 of the second core member 40 so as to abut.
As a result, all of the electromagnetic steel plates constituting the second core member 40 can be reliably assembled to the electromagnetic steel plates constituting the first core member 30. Therefore, it is possible to more reliably prevent a part of the electromagnetic steel sheet constituting the second core member 40 from slipping or falling off.

Further, when the end of the tooth base 32 of the first core member 30 is press-fitted into the recess 42 of the second core member 40, the first core member 30 or the insulating member 100 and the second core member 40 have a strong force. If they come into contact with each other, the first core member 30 and the second core member 40 may be deformed, or the insulating member 100 may be cracked.
In the present embodiment, the insulating member 100 protrudes at a position axially lower than the lower surface 172 forming the through hole 170 and overlapping the lower surface 172 along the axial direction on the end surface 110A on the radial outer peripheral side of the flange portion 110. Part 140 is formed. Further, the protrusion 140 has a guide surface 142 formed on the lower side in the axial direction (the side where the end portion of the tooth base portion 23 is inserted into the recess 42).
As a result, when the end portion of the teeth base portion 32 inserted into the through hole 170 of the insulating member 100 is inserted into the recess 42 of the second core member 40 from the upper side in the axial direction (one side in the axial direction), the teeth base portion 32 The end portion of the tooth base 32 is guided into the recess 42 by the guide surface 142 formed on the axially lower side of the protrusion 140 arranged on the lower side in the axial direction (the other side in the axial direction) from the end portion of the tooth base portion 32. To. Therefore, it is possible to prevent the first core member 30 or the insulating member 100 from coming into contact with the second core member 40 with a strong force, and the first core member 30 and the second core member 40 are deformed. Alternatively, it is possible to prevent the insulating member 100 from being cracked.

Further, as a method of press-fitting the end portion of the tooth base portion 32 into the recess 42 of the second core member 40, as shown in FIG. 9, a press-fitting jig 500 is used from the through hole 170 of the insulating member 100. A method of applying a force for moving the tooth base 32 downward in the axial direction can be used on the upper surface 32a of the end portion of the protruding tooth base 32.
In this case, if the width D along the circumferential direction of the press-fitting jig 500 is smaller than the width N of the upper surface 32a of the end portion of the tooth base 32, the force applied by the press-fitting jig 500 causes the upper surface of the end portion of the tooth base 32. There is a possibility that a dent may be generated in 32a. When a dent is generated on the upper surface 32a of the end portion of the tooth base portion 32, the end portion of the tooth base portion 32 swells in the circumferential direction and the radial direction, and the end portion of the tooth base portion 32 is press-fitted into the recess 42 of the second core member 40. Becomes difficult.
In the present embodiment, the distance K between the protrusions 120 and 130 formed on the radial outer peripheral end surface 110A of the flange portion 110 of the insulating member 100 is set to a width larger than the width N of the end portion of the tooth base 32. The press-fitting jig 500 having D is set to a value that can be inserted with a gap in the space between the protrusions 120 and 130. That is, the side surface 123 of the protrusion 120 is arranged at a position away from the left side surface 173 forming the through hole 170 on the left side in the circumferential direction (one side in the circumferential direction), and the side surface 133 of the protrusion 130 is provided with the through hole 170. It is arranged at a position away from the right side surface 174 to be formed on the right side in the circumferential direction (the other side in the circumferential direction). Specifically, it is set so as to satisfy [K>D> N].
As a result, the press-fitting jig 500 having a width D larger than the width N of the teeth base portion 32 can be used. Therefore, when the end portion of the teeth base portion 32 is press-fitted into the recess 42, the end portion of the teeth base portion 32 is in the circumferential direction and It is possible to prevent the swelling in the radial direction and facilitate the press-fitting work.

Further, as shown in FIG. 5, in the insulating member 100 of the present embodiment, the collar portions 110 and 150 have a rectangular outer circumference, and at least one of the outer peripheral corner portions is cut out. It has a shape (for example, an R-plane or a linear chamfered shape). That is, the outer peripheral surfaces 122 and 132 of the protrusions 120 and 130 formed at the upper end in the axial direction of the end surface 110A of the collar 110, and the corners 151 to 154 (see FIG. 5) of the collar 150 are square. The corners of the shape have a notched shape.
The winding start portion 50a and the winding end portion 50b of the stator winding 50 wound around the teeth 31 (specifically, the teeth base 32) are usually bound by using a binding member such as a binding string. When binding the stator winding 50 with a binding string, it is necessary to provide a space for passing the binding string in the flange portions 110 and 150.
In the present embodiment, when the first core member 30 and the second core member 40 are assembled, as shown in FIG. 10, the flange portion 110 adjacent in the circumferential direction has a notched shape. A space 110a is formed between the corners. Further, a space 150a is formed between the corner portions of the flange portions 150 adjacent to each other in the circumferential direction and having a notched shape.
Therefore, in the present embodiment, it is not necessary to form a space in the flange portion 110 or 150 for passing the binding member that binds the stator winding 50.

A second embodiment 200 of the insulating member of the present invention will be described with reference to FIGS. 13 and 14. 13 is a cross-sectional view taken along the radial direction of the insulating member 200, and FIG. 14 is a cross-sectional view perpendicular to the axial direction of the insulating member 200.
In the insulating member 200 of the second embodiment, the shape of the through hole 270 into which the end of the tooth base 32 of the first core member 30 is inserted is the same as the shape of the through hole 170 of the insulating member 100 of the first embodiment. It is different. Therefore, in the following, only the shape of the through hole 270 will be described.
The through hole 270 is formed by an upper surface 271, a lower surface 272, a left side surface 273, and a right side surface 274.
The upper surface 271 has an inclined surface 271b. In the present embodiment, the upper surface 271 does not have an inner peripheral surface on the inner peripheral side and an outer peripheral surface on the outer peripheral side.
The lower surface 272 has an inner peripheral surface 272a and an inclined surface 272b on the inner peripheral side. In the present embodiment, the lower surface 272 does not have an outer peripheral surface on the outer peripheral side.
The left side surface 273 has an inner peripheral side inner peripheral surface 273a and an inclined surface 273b, and the right side surface 274 has an inner peripheral side inner peripheral surface 274a and an inclined surface 274b. In the present embodiment, the left side surface 273 and the right side surface 274 do not have an outer peripheral surface on the outer peripheral side.
In the present embodiment, the inclined surface 271b of the upper surface 271 corresponds to the "first inclined surface" of the present invention, and the inner peripheral side inner peripheral surface 272a and the inclined surface 272b of the lower surface 272 correspond to the "first inclined surface" of the present invention, respectively. The inner peripheral side inner peripheral surface 273a and the inclined surface 273b of the left side surface 273 correspond to the "inner peripheral side inner peripheral surface" and the "second inclined surface" of the present invention, respectively. Corresponding to the "surface" and the "third inclined surface", the inner peripheral side inner peripheral surface 274a and the inclined surface 274b of the right side surface 274 are the "fourth inner peripheral side inner peripheral surface" and the "fourth" of the present invention, respectively. Corresponds to the "sloping surface".

The inclined surfaces 271b and 272b are holding surfaces for holding the insulating member 200 in which the end portion of the tooth base portion 32 is inserted into the through hole 270 so as not to fall from the end portion of the tooth base portion 32.
In the present embodiment, the inclined surface 271b of the upper surface 271 and the inclined surface 272b of the lower surface 272 are inclined so that the distance between them along the axial direction is equal (including "substantially equal") along the radial direction. .. For example, as shown in FIG. 13, the inclination angle of the inclined surface 271b with respect to the radial direction is set to −α, and the inclination angle of the inclined surface 272b with respect to the radial direction is set to −α. The inclined surfaces 271b and 272b are formed so that the distance between them along the axial direction is larger than the length along the axial direction of the tooth base 32.
In the inner peripheral surface 272a of the lower surface 272, the distance between the inclined surface 271b of the upper surface 271 and the inner peripheral surface 272a of the lower surface 272 along the axial direction is from the radial inner peripheral side to the inner peripheral side. It is formed on a tapered surface that decreases toward the connection portion between the inner peripheral surface 272a and the inclined surface 272b. The inclination angle of the inner peripheral surface 272a on the inner peripheral side with respect to the radial direction is such that the inclined surface 271b of the upper surface 271 forming the through hole 270 and the inclined surface 272b of the lower surface 272 follow the upper surface 32a and the lower surface 32b of the tooth base 32. The insulating member 200 is set at a tiltable angle with respect to the end of the tooth base 32 so as to be (parallel).
Further, the inclined surface 273b of the left side surface 273 and the inclined surface 274b of the right side surface 274 are inclined so that the distance between them along the circumferential direction decreases from the radial inner peripheral side toward the radial outer peripheral side. .. For example, as shown in FIG. 14, the inclination angle of the inclined surface 273b with respect to the radial direction is set to −β, and the inclination angle of the inclined surface 274b with respect to the radial direction is set to β. The inclined surfaces 273b and 274b are formed so that the minimum value of the interval along the circumferential direction of both is smaller than the width N of the tooth base 32.
The inner peripheral side inner peripheral surfaces 273a and 274a of the left side surface 273 and the right side surface 274 guide the end portion of the tooth base portion 32 into the through hole 270 when the end portion of the tooth base portion 32 is inserted into the through hole 270. It is formed as a surface. In the present embodiment, the inner peripheral surfaces 273a and 274a on the inner peripheral side are formed on a tapered surface in which the distance between them along the axial direction decreases from the inner peripheral side in the radial direction to the outer peripheral side in the radial direction.

The operation of mounting the insulating member 200 of the present embodiment on the teeth 31 of the first core member 30 will be described.
When the end of the tooth base 32 of the tooth 31 is inserted into the through hole 270 of the insulating member 200, the inclined surface 271b of the upper surface 271, the inner peripheral side inner peripheral surface 272a of the lower surface 272, and the inner peripheral side of the left side surface 273 are inside. The end of the tooth base 32 is guided into the through hole 270 by the inner peripheral side inner peripheral surface 274a of the peripheral surface 273a and the right side surface 274.
When the end of the tooth base 32 is further inserted into the through hole 270, the insulating member 200 has the inclined surfaces 271b and 272b of the upper surface 271 and the lower surface 272 forming the through hole 270, and the upper surface 32a and the upper surface 32a of the end portion of the tooth base 32. It is inclined with respect to the end portion of the tooth base 32 so as to follow (parallelize) the lower surface 32b. That is, the insulating member 200 is in a state of being inclined by an angle corresponding to the inclination angles α of the inclined surfaces 271b and 272b with respect to the end portion of the tooth base 32 when viewed in a cross section along the radial direction. Further, the left side surface 32c and the right side surface 32d of the end portion of the tooth base portion 32 come into contact with the inclined surface 273b of the left side surface 273 and the inclined surface 274b of the right side surface 274 forming the through hole 270. As a result, the insulating member 200 is restricted from moving along the circumferential direction with respect to the end portion of the tooth base portion 32.

As described above, when the insulating member 200 of the present embodiment is attached to the teeth 31 (the end of the teeth base 32 is inserted into the through hole 270), the insulating member 200 moves along the circumferential direction with respect to the teeth base 32. Is regulated, and when viewed in a cross section along the radial direction, the upper surface 271 is inclined by an angle corresponding to the inclination angle of the inclined surface 271b and the lower surface 272 of the inclined surface 272b. In the present embodiment, the inclination angles of the inclined surfaces 271b and 272b are set so as to be inclined upward in the axial direction from the inner peripheral side in the radial direction toward the outer peripheral side in the radial direction.
As a result, when the first core member 30 and the second core member 40 are assembled with the insulating member 200 attached to the tooth 31, the insulating member 200 is prevented from falling off from the tooth 31 (teeth base 32). be able to. Further, since the insulating member 200 is inclined upward in the axial direction from the inner peripheral side in the radial direction to the outer peripheral side in the radial direction with respect to the tooth base 32, the end portion of the tooth base 32 is inserted into the through hole 270. Interference by the insulating member 200 can be prevented, and the tooth base 32 can be easily inserted into the recess 42 of the second core member 40.

A third embodiment 300 of the insulating member of the present invention will be described with reference to FIG. Note that FIG. 15 is a cross-sectional view of the insulating member 300 along the radial direction.
The insulating member 300 of the third embodiment has a through hole 370 formed by an upper surface, a lower surface, a left side surface, and a right side surface, similarly to the insulating member 100 of the first embodiment and the insulating member 200 of the second embodiment. have. The left side surface and the right side surface forming the through hole 370 may be formed in the same shape as the left side surface 173 and the right side surface 174 forming the through hole 170 or the left side surface 273 and the right side surface 274 forming the through hole 270. it can. Therefore, in the following, the shapes of the upper surface and the lower surface forming the through hole 370 will be described.
In the insulating member 300 of the present embodiment, the upper surface 371 forming the through hole 370 has an inner peripheral side inner peripheral surface 371a and an inclined surface 371b, and the lower surface 372 has an inner peripheral side inner peripheral surface 372a and an inclined surface 372b. It has an outer peripheral side inner peripheral surface 372c. In the present embodiment, the upper surface 371 does not have an outer peripheral side inner peripheral surface.
In the present embodiment, the inner peripheral side inner peripheral surface 371a and the inclined surface 371b of the upper surface 371 correspond to the "first inner peripheral side inner peripheral surface" and the "first inclined surface" of the present invention, respectively, and the lower surface 372. The inner peripheral surface 372a, the inclined surface 372b, and the outer peripheral inner peripheral surface 372c of the present invention are the "second inner peripheral surface", "second inclined surface", and "second outer peripheral surface" of the present invention, respectively. Corresponds to "side inner peripheral surface".

The inclined surface 371b of the upper surface 371 and the inclined surface 372b of the lower surface 372 are spaced apart from each other along the axial direction, similarly to the inclined surface 171b of the upper surface 171 and the inclined surface 172b of the lower surface 172 of the insulating member 100 of the first embodiment. Is tilted so that it decreases along the radial direction. That is, the inclined surfaces 371b and 372b are deviation prevention surfaces for preventing the insulation member 300 from being displaced with respect to the tooth base 32.
The inner peripheral surface 371a on the inner peripheral side of the upper surface 371 and the outer peripheral inner peripheral surface 372c of the lower surface 372 are provided with an insulating member 300 in which the end portion of the tooth base 32 is inserted into the through hole 370 with respect to the end portion of the tooth base 32. It is a holding surface that holds it stably.
In the present embodiment, the inner peripheral surface 371a on the inner peripheral side and the inner peripheral surface 372c on the outer peripheral side are formed so as to extend in parallel (including "substantially parallel") in the radial direction. That is, the distance between the inner peripheral surface 371a on the inner peripheral side and the inner peripheral surface 372c on the outer peripheral side along the axial direction is set to be equal (including "substantially equal") along the radial direction. The distance between the inner peripheral surface 371a on the inner peripheral side and the inner peripheral surface 372c on the outer peripheral side along the axial direction is set to be smaller than the length along the axial direction of the tooth base 32.
In the inner peripheral side inner peripheral surface 372a of the lower surface 372, the distance between the inner peripheral side inner peripheral surface 371a of the upper surface 371 and the inner peripheral side inner peripheral surface 372a along the axial direction is radial from the radial inner peripheral side. It is formed on a tapered surface that decreases toward the outer peripheral side.
In the present embodiment, the inner peripheral surface on the inner peripheral side is provided on the upper surface and the inner peripheral surface on the outer peripheral side is provided on the lower surface, but the inner peripheral surface on the outer peripheral side is provided on the upper surface and the inner peripheral surface on the inner peripheral side is provided on the lower surface. You may. That is, one of the upper surface and the lower surface may have an inner peripheral surface on the inner peripheral side extending in parallel in the radial direction, and the other may have an inner peripheral surface on the outer peripheral side parallel in the radial direction. In this case, the inclined inner peripheral surface is provided on the other side.

The operation of mounting the insulating member 300 of the present embodiment on the teeth 31 of the first core member 30 will be described. The operation and effect of the left side surface and the right side surface are the operation and effect of the left side surface 173 and the right side surface 174 of the insulating member 100 of the first embodiment, or the left side surface 273 and the right side of the insulating member 200 of the second embodiment. Since it is the same as the operation and effect by the surface 274, the description thereof will be omitted.
When the end of the tooth base 32 of the tooth 31 is inserted into the through hole 370 of the insulating member 300, the end of the tooth base 32 is formed by the inclined surface 371b of the upper surface 371 and the inner peripheral surface 372a of the lower surface 372. It is guided into the through hole 370.
When the end of the tooth base 32 is further inserted into the through hole 370, the upper surface 32a and the lower surface 32b of the end of the tooth base 32 hit the inclined surface 371b of the upper surface 371 and the inclined surface 372b of the lower surface 372 forming the through hole 370. Get in touch. As a result, the insulating member 300 is restricted from moving along the axial direction with respect to the tooth base 32.
When the end of the tooth base 32 is further inserted into the through hole 370, the upper surface 32a and the lower surface 32b of the end of the tooth base 32 form the through hole 370, and the inner peripheral side inner peripheral surface 371a and the outer circumference of the upper surface 371 and the lower surface 372 form the through hole 370. In contact with the side inner peripheral surface 371c, the insulating member 300 is held parallel to (including "substantially parallel") the upper surface 32a and the lower surface 32b of the tooth base 32 in the axial direction.

A fourth embodiment of the insulating member of the present invention will be described with reference to FIG. FIG. 16 is a perspective view of the insulating member 400 of the fourth embodiment.
Similar to the insulating member 100 of the first embodiment, the insulating member 400 of the present embodiment includes a body portion 460, collar portions 410 and 450, and protrusions 420 provided on the end faces of the flange portions 410 on the radial outer peripheral side. It has through holes 470 formed by 430 and 440, top surface 471, bottom surface 472, left side surface 473 and right side surface 474.
In the present embodiment, the arrangement positions of the contact surface 421 of the protrusion 420 and the contact surface 431 of the protrusion 430 are different from those of the insulating member 100 of the first embodiment.
That is, the contact surface 421 of the protrusion 420 is separated from the left side surface 473 forming the through hole 470 to the left side in the circumferential direction (one side in the circumferential direction), and is axially lower than the upper surface 471 (the other side in the axial direction). It is provided at a position separated by a distance H. Further, the contact surface 431 of the protrusion 430 is separated from the right side surface 474 forming the through hole 470 on the right side in the circumferential direction (the other side in the circumferential direction), and is axially lower than the upper surface 471 (the other side in the axial direction). It is provided at a position separated by a distance H. The configuration of the present embodiment expresses that the upper surface 471 forming the through hole 470 is arranged at a position separated by a distance H on the upper side in the axial direction (one side in the axial direction) from the contact surfaces 421 and 431. You can also do it.

Stator of another embodiment using the insulating member 400 of this embodiment is shown in FIGS. 17 to 19. 17 is a perspective view of a part of the stator of another embodiment, FIG. 18 is a cross-sectional view taken along the radial direction, and FIG. 19 is a cross-sectional view taken along the circumferential direction.
In the stator of the present embodiment, the contact surfaces 421 and 431 of the protrusions 420 and 430 of the insulating member 400 are provided at positions separated from the upper surface 471 forming the through hole 470 in the axial direction. The difference between the length L3 along the axial direction of the second core member 40 (yoke 41) and the length L4 along the axial direction of the first core member 30 (teeth 31) can be increased. As a result, the electromagnetic steel plate constituting the second core member 40 can be reliably assembled by the electromagnetic steel plate constituting the first core member 30.

The present invention can be configured as follows.
(Aspect 1)
When viewed in a cross section perpendicular to the axial direction, a teeth base extending radially from the yoke extending along the circumferential direction to the inner peripheral side along the radial direction, and a teeth base provided on the radial inner peripheral side of the teeth base and peripherally provided. An insulating member attached to the teeth of the stator core, which has a tooth tip extending along the direction.
A body having a through hole into which the teeth base is inserted, and a body
A first flange portion provided at the end on the inner peripheral side in the radial direction of the body portion and protruding from the body portion, and
It has a second collar that is provided at the end of the body on the outer peripheral side in the radial direction and protrudes from the body.
The through hole is arranged on one side in the axial direction when the tooth base is inserted into the through hole, and extends along the radial direction and the circumferential direction. The first inner peripheral surface and the other side in the axial direction. Arranged in, formed by a second inner peripheral surface extending radially and along the circumferential direction,
When the tooth base is inserted into the through hole and viewed in a cross section along the radial direction, the first inner peripheral surface is a first inclined surface extending in a state of being inclined with respect to the radial direction. An insulating member having a second inner peripheral surface, which has a second inclined surface extending in a state of being inclined with respect to the radial direction.
(Aspect 2)
In the insulating member of the first aspect, the first inclined surface and the second inclined surface have the same distance along the axial direction between the first inclined surface and the second inclined surface. An insulating member characterized in that it extends as such.
(Aspect 3)
The insulating member according to aspect 1 or 2, wherein the first inner peripheral surface has a first outer peripheral side inner peripheral surface on the outer peripheral side in the radial direction from the first inclined surface, and the second inner peripheral surface is provided. The surface has a second outer peripheral side inner peripheral surface on the outer peripheral side in the radial direction from the second inclined surface, and the first outer peripheral side inner peripheral surface and the second outer peripheral side inner peripheral surface are in the radial direction. An insulating member characterized in that it extends parallel to.
(Aspect 4)
The insulating member of the first aspect, the first inner peripheral surface has a first outer peripheral side inner peripheral surface extending in parallel with the radial direction on the outer peripheral side in the radial direction from the first inclined surface. In addition, the second inner peripheral surface has a second inner peripheral surface extending in parallel with the radial direction on the inner peripheral side in the radial direction from the second inclined surface, or The first inner peripheral surface has a first inner peripheral surface extending in parallel with the radial direction on the inner peripheral side in the radial direction from the first inclined surface, and the second inner peripheral surface. The inner peripheral surface of the is an insulating member having a second outer peripheral side inner peripheral surface extending in parallel with the radial direction on the outer peripheral side in the radial direction from the second inclined surface.
(Aspect 5)
The insulating member according to any one of aspects 1 to 3, wherein the first inner peripheral surface has a first inner peripheral side inner peripheral surface on the radial inner peripheral side of the first inclined surface. The second inner peripheral surface has a second inner peripheral surface on the inner peripheral side in the radial direction from the second inclined surface, and the first inner peripheral side inner peripheral surface and the second inner peripheral surface. In the inner peripheral surface on the inner peripheral side, the distance between the first inner peripheral surface and the second inner peripheral surface along the axial direction is radial from the radial inner peripheral side. An insulating member that is formed so as to decrease toward the outer peripheral side and constitutes a guide surface that guides the insertion of the tooth base into the through hole.
(Aspect 6 )
An insulating member according to any one of aspects 1 to 5, wherein the through hole is arranged on one side in the circumferential direction in a state where the tooth base is inserted into the through hole, and is arranged along the radial direction and the axial direction. It is formed by a third inner peripheral surface that extends and a fourth inner peripheral surface that is arranged on the other side in the circumferential direction and extends along the radial and axial directions, and the tooth base is inserted into the through hole. The third inner peripheral surface has a third inclined surface that is inclined and extends in the radial direction when viewed in a cross section perpendicular to the axial direction in the above-mentioned state, and the fourth inner peripheral surface. Has a fourth inclined surface that is inclined and extends in the radial direction, and the third inclined surface and the fourth inclined surface are the third inclined surface and the fourth inclined surface. An insulating member characterized in that the distance between the two with and along the circumferential direction is formed so as to decrease from the radial inner peripheral side toward the radial outer peripheral side.
(Aspect 7)
In the insulating member of the sixth aspect, the third inner peripheral surface has a third outer peripheral side inner peripheral surface on the outer peripheral side in the radial direction from the third inclined surface, and the fourth inner peripheral surface is A fourth outer peripheral side inner peripheral surface is provided on the outer peripheral side in the radial direction from the fourth inclined surface, and the third outer peripheral surface side inner peripheral surface and the fourth outer peripheral side inner peripheral surface are in the radial direction. An insulating member characterized in that it extends in parallel.
(Aspect 8)
The insulating member according to aspect 6 or 7, wherein the third inner peripheral surface has a third inner peripheral surface on the radial inner peripheral side of the third inclined surface, and the fourth inner peripheral surface is provided. The inner peripheral surface has a fourth inner peripheral side inner peripheral surface on the radial inner peripheral side of the fourth inclined surface, and the third inner peripheral side inner peripheral surface and the fourth inner peripheral side inner surface. In the peripheral surface, the distance between the third inner peripheral surface and the fourth inner peripheral surface along the circumferential direction is directed from the radial inner peripheral side to the radial outer peripheral side. An insulating member that is formed so as to decrease in number and constitutes a guide surface that guides the insertion of the tooth base into the through hole.
(Aspect 9 )
The insulating member according to any one of aspects 1 to 8, wherein the first flange portion and the second flange portion have a quadrangular outer circumference, and at least one corner portion is notched. An insulating member characterized by being sewn.
(Aspect 10)
It has a stator core, an insulating member, and a stator winding.
The stator core has a yoke extending along the circumferential direction and teeth extending along the radial direction when viewed in a cross section perpendicular to the axial direction, and the teeth extend radially from the yoke. It has a teeth base extending along the inner peripheral side and a teeth tip portion provided on the radial inner peripheral side of the teeth base and extending along the circumferential direction.
The insulating member is attached to the tooth and
The stator winding is a stator wound around the insulating member mounted on the tooth.
A stator characterized in that an insulating member according to any one of aspects 1 to 9 is used as the insulating member.
(Aspect 11)
A stator according to aspect 10, wherein the stator core is composed of a first core member having the teeth and a second core member having the yoke.
(Aspect 12)
The stator according to aspect 10 or 11, wherein the stator winding has a winding start portion arranged on the radial inner peripheral side and a winding end portion arranged on the radial outer peripheral side. Child.
(Aspect 13)
In any of the stators of aspects 10 to 12, the length of the second core member along the axial direction is set shorter than the length of the first core member along the axial direction. Stator characterized by being present.
(Aspect 14)
An electric motor including a stator and a rotor that can rotate relative to the stator.
An electric motor characterized in that any of the stators of aspects 10 to 13 is used as the stator .

The present invention is not limited to the configuration described in the embodiment, and various changes, additions, and deletions can be made.
The present invention may be configured as an insulating member, or as a stator having a stator core, an insulating member and a stator winding, and may rotate relative to the stator and the stator. It can also be configured as an electric motor with a possible rotor. Alternatively, it can be configured as a stator manufacturing method for manufacturing a stator having a stator core and an insulating member.
The through holes of the insulating member can be formed into various shapes. For example, a shape in which a surface facing in the axial direction (a surface on one side in the axial direction and a surface on the other side in the axial direction) has at least an inclined surface, or a surface facing in the circumferential direction (a surface on one side in the circumferential direction). The surface on the other side in the circumferential direction) can be formed into a shape having at least an inclined surface.
In the embodiment, the end portion of the tooth base is a through hole of the insulating member so that the first protrusion and the second protrusion are arranged on the upper side in the axial direction and the third protrusion is arranged on the lower side in the axial direction. However, the end of the tooth base is penetrated through the insulating member so that the first protrusion and the second protrusion are arranged on the lower side in the axial direction and the third protrusion is arranged on the upper side in the axial direction. It can also be inserted into the hole.
At least one protrusion having a contact surface with which one end surface of the second core member (yoke) can abut is provided on the end surface on the radial outer peripheral side of the flange portion on the radial outer peripheral side. Just do it.
The shape, number, and arrangement position of the protrusions provided on the end face of the radial outer peripheral side of the flange portion on the radial outer peripheral side can be appropriately set.
In the embodiment, one first core member having a plurality of teeth connected by a connecting portion is used, but a plurality of first core members having one tooth can also be used.
Each configuration described in the embodiment may be used alone or in combination of a plurality selected as appropriate.

10 Stator 20 Stator core 20a Rotor insertion space 30 First core member 31 Teeth 32 Teeth base 32a Upper surface 32b Lower surface 32c Left side 32d Right side 33 Teeth tip 34 Teeth tip surface 35 Connecting part 40 Second core member 40A, 40B End face 41 York 42 Recess 50 Stator winding 50a Winding start part 50b Winding end part 100, 200, 300, 400 Insulating member 110, 150, 210, 250, 310, 350, 410, 450 Collar 110a, 150a Spaces 110A, 110B End faces 120, 130, 140, 220, 230, 240, 320, 340, 420, 430, 440, protrusions 120a, 130a, 140a, 420a, 430a, 440a Recesses 121, 131, 421, 431 contact Surfaces 122, 123, 422, 432 Outer surface (notched surface)
123, 13, 423, 433 Side surface 141 Upper surface 142, 442 Guide surface 151, 152, 153, 154 Corner part 160, 260, 360, 460 Body 170, 270, 370, 470 Through hole 171, 471 Upper surface 172, 472 Lower surface 173, 473 Left side 174, 474 Right side 171a, 172a, 173a, 174a, 272a, 273a, 274a, 371a, 372a, Inner peripheral surface 171b, 172b, 173b, 174b, 271b, 272b, 273b, 274b, 371b, 372b Inclined surfaces 171c, 172c, 173c, 174c, 372c Outer peripheral side inner peripheral surface 500 press-fitting jig

Claims (10)

When viewed in a cross section perpendicular to the axial direction, a tooth base extending radially from the yoke extending along the circumferential direction to the inner peripheral side along the radial direction, and a tooth base provided on the radial inner peripheral side of the tooth base and peripheral An insulating member attached to the teeth of the stator core, which has a tooth tip extending along the direction.
A body having a through hole into which the teeth base is inserted, and a body
A first flange portion provided at the end on the inner peripheral side in the radial direction of the body portion and protruding from the body portion, and
It has a second collar that is provided at the end of the body on the outer peripheral side in the radial direction and protrudes from the body.
The through hole is arranged on one side in the axial direction when the tooth base is inserted into the through hole, and has a first inner peripheral surface extending along the radial and circumferential directions and the other side in the axial direction. A second inner peripheral surface arranged in the radial direction and extending along the circumferential direction, and a third inner peripheral surface arranged on one side in the circumferential direction and extending along the radial direction and the axial direction. Arranged on the other side of the circumferential direction , formed by a fourth inner peripheral surface extending along the radial and axial directions .
The first inner peripheral surface is a first inclined surface extending in a state of being inclined with respect to the radial direction when viewed in a cross section along the radial direction when the tooth base is inserted into the through hole. The first inner peripheral surface, which is arranged on the inner peripheral side in the radial direction from the first inclined surface and extends in a state of being inclined with respect to the radial direction, and the outer peripheral surface in the radial direction from the first inclined surface. It has a first outer peripheral side inner peripheral surface that is arranged on the side and extends parallel to the radial direction.
The second inner peripheral surface is a second inclined surface extending in a state of being inclined with respect to the radial direction when viewed in a cross section along the radial direction when the tooth base is inserted into the through hole. The second inner peripheral surface, which is arranged on the inner peripheral side in the radial direction from the second inclined surface and extends in a state of being inclined with respect to the radial direction, and the outer peripheral surface in the radial direction from the second inclined surface. It has a second outer peripheral inner peripheral surface that is located on the side and extends parallel to the radial direction.
The distance between the first inclined surface and the second inclined surface along the axial direction between the first inclined surface and the second inclined surface is from the inner peripheral side in the radial direction to the outer peripheral side in the radial direction. Formed to decrease towards
The first inner peripheral side inner peripheral surface and the second inner peripheral side inner peripheral surface are in the axial direction between the first inner peripheral side inner peripheral surface and the second inner peripheral side inner peripheral surface. The distance along the line is from the radial inner peripheral side to the connecting portion between the first inner peripheral side inner peripheral surface and the first inclined surface, and the second inner peripheral side inner peripheral surface and the second. It constitutes a guide surface that is formed so as to decrease toward the connection portion with the inclined surface and guides the insertion of the tooth base into the through hole.
The third inner peripheral surface is a third inclined surface extending in a state of being inclined with respect to the radial direction when viewed in a cross section perpendicular to the axial direction when the tooth base is inserted into the through hole. A third inner peripheral surface that is arranged on the inner peripheral side in the radial direction from the third inclined surface and extends in a state of being inclined with respect to the radial direction.
The fourth inner peripheral surface is a fourth inclined surface extending in a state of being inclined with respect to the radial direction when viewed in a cross section perpendicular to the axial direction when the tooth base is inserted into the through hole. It has a fourth inner peripheral surface that is arranged on the inner peripheral side in the radial direction from the fourth inclined surface and extends in a state of being inclined with respect to the radial direction.
The distance between the third inclined surface and the fourth inclined surface along the circumferential direction between the third inclined surface and the fourth inclined surface is from the inner peripheral side in the radial direction to the outer peripheral side in the radial direction. Formed to decrease towards
The third inner peripheral side inner peripheral surface and the fourth inner peripheral side inner peripheral surface are in the circumferential direction between the third inner peripheral side inner peripheral surface and the fourth inner peripheral side inner peripheral surface. The interval along the radial direction is from the radial inner peripheral side to the connecting portion between the third inner peripheral side inner peripheral surface and the third inclined surface, and the fourth inner peripheral side inner peripheral surface and the fourth. An insulating member that is formed so as to decrease toward a connection portion with an inclined surface and constitutes a guide surface that guides the insertion of the tooth base portion into the through hole . The insulating member according to claim 1 .
The third inner peripheral surface has a third outer peripheral surface that is arranged on the outer peripheral side in the radial direction from the third inclined surface and extends in parallel with the radial direction.
The fourth inner peripheral surface is arranged on the outer peripheral side in the radial direction from the fourth inclined surface, and has a fourth outer peripheral side inner peripheral surface extending in parallel with the radial direction. Insulation member. The insulating member according to claim 1 or 2.
A first protrusion is formed on one end surface on the radial outer peripheral side of the second flange portion on one side in the axial direction and on one end surface on one side in the circumferential direction from the third inner peripheral surface. An insulating member, characterized in that a second protrusion is formed on the side at an end on the other side in the circumferential direction from the fourth inner peripheral surface. The insulating member according to any one of claims 1 to 3.
A third protrusion is formed on the end surface of the second flange portion on the outer peripheral side in the radial direction at a position overlapping the second inner peripheral surface in the axial direction on the other side in the axial direction. A characteristic insulating member. The insulating member according to any one of claims 1 to 4 .
An insulating member, wherein the first flange portion and the second flange portion have a quadrangular outer circumference and at least one corner portion is cut out. It has a stator core, an insulating member, and a stator winding.
The stator core has a yoke extending along the circumferential direction and teeth extending along the radial direction when viewed in a cross section perpendicular to the axial direction, and the teeth extend radially from the yoke. It has a teeth base extending along the inner peripheral side and a teeth tip portion provided on the radial inner peripheral side of the teeth base and extending along the circumferential direction.
The insulating member is attached to the tooth and
The stator winding is a stator wound around the insulating member mounted on the tooth.
A stator according to any one of claims 1 to 5 , wherein the insulating member according to any one of claims 1 to 5 is used as the insulating member. The stator according to claim 6 , wherein the stator
The stator core is a stator characterized in that it is composed of a first core member having the teeth and a second core member having the yoke. The stator according to claim 6 or 7.
The stator winding is characterized in that the winding start portion is arranged on the inner peripheral side in the radial direction and the winding end portion is arranged on the outer peripheral side in the radial direction. The stator according to any one of claims 6 to 8 .
A stator characterized in that the length along the axial direction of the second core member is set shorter than the length along the axial direction of the first core member. An electric motor including a stator and a rotor that can rotate relative to the stator.
An electric motor according to any one of claims 6 to 9 , wherein the stator according to any one of claims 6 to 9 is used as the stator.

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