JP6840593B2 - Interphase insulation member insertion method and electric motor manufacturing method - Google Patents

Description

The present invention relates to a method for inserting an interphase insulating member in a stator in which a stator winding is wound by a centralized winding method.

As a drive motor for driving equipment (for example, an air conditioner drive motor, a vehicle drive motor, an in-vehicle equipment drive motor), a stator in which a stator winding is wound by a centralized winding method (called a "concentrated winding stator"). ) Is used (called a "concentrated winding motor"). The centralized winding stator includes a stator core, an end insulating member (called a "resin bobbin"), a stator winding, and an interphase insulating member. The stator winding is wound with end insulating members arranged on both sides of the stator core in the axial direction. Also, the interphase insulating member is arranged between the stator windings of different adjacent phases inserted in the slot.

Such a centralized winding motor is disclosed in, for example, Patent Document 1 (Japanese Unexamined Patent Publication No. 2012-55098). 12 and 13 show a schematic configuration of a stator (concentrated winding stator) 10 constituting the centralized winding motor disclosed in Patent Document 1. Note that FIG. 12 is a perspective view of the stator 10, and FIG. 13 is a cross-sectional view of FIG. 12 as viewed from the arrows XIII-XIII.
The stator 10 has a stator core 20, a first end insulating member 300, a second end insulating member 400, a stator winding 40, and an interphase insulating member 50. The stator core 20 has a yoke 21, a teeth 22 formed by a teeth base 23 and a teeth tip 24, and a slot 25 formed by the teeth 22 adjacent in the circumferential direction. The first end insulating member 300 has an outer wall portion 310, an inner wall portion 320, and a connecting portion 330. Although not shown, the second end insulating member 400 also has an outer wall portion 410, an inner wall portion 420, and a connecting portion 430 having the same shape as the first end insulating member 300. The stator winding 40 is wound with the first end insulating member 300 and the second end insulating member 400 arranged on both sides of the stator core 20 in the axial direction. Further, in the slot 25 of the stator core 20, an interphase insulating member 50 bent in a V shape is arranged between the stator windings 40 of adjacent different phases.
When the stator winding 40 is wound with the first end insulating member 300 and the second end insulating member 400 arranged on both sides of the stator core 20 in the axial direction, the first end insulating member is insulated. The outer peripheral surface 322 of the inner wall of the inner wall 310 of the member 300 and the outer peripheral surface 422 of the inner wall of the inner wall 420 of the second end insulating member 400 meet with the boundary of the region (winding region) around which the stator winding 40 can be wound. Become. That is, in the state where the stator winding 40 is wound, the outer peripheral surface of the inner wall portion 320 of the inner wall portion 320 of the first end insulating member 300 and the outer peripheral surface of the inner wall portion 420 of the inner wall portion 420 of the second end insulating member 400. A first gap S1 is formed between the 422 and the outer peripheral surface 24d of the first tooth tip portion on one side in the circumferential direction of the tooth tip portion 24, and the inner wall portion of the inner wall portion 320 of the first end insulating member 300. A second outer peripheral surface 422 and the outer peripheral surface 422 of the inner wall portion 420 of the inner wall portion 420 of the second end insulating member 400 and the outer peripheral surface 24e of the second tooth tip portion on the other side in the circumferential direction of the tooth tip portion 24. A gap S2 is formed.
The interphase insulating member 50 includes a first edge portion including a first edge portion on one side in the circumferential direction, a second edge portion including a second edge portion on the other side in the circumferential direction, a first edge portion and a second edge portion. It has a first central portion and a second central portion provided between the edges and the edges, and is bent in a V shape. The first edge portion and the second edge portion of the interphase insulating member 50 are arranged in the second gap S2 and the first gap S1 formed in the slot 25, and are arranged in the first central portion and the second gap S1. The central portion is arranged in the slot 25 so as to extend radially along the radial direction between the stator winding wefts 40 of different phases.
In the conventional stator 10, in order to arrange the first edge portion and the second edge portion of the interphase insulating member 50 in the second gap S2 and the first gap S1 formed in the slot 25, Interphase insulation extending along the axial direction to at least one end insulating member, for example, the inner wall 320 of the first end insulating member 300 so as to communicate with the first gap S1 and the second gap S2. A member guide passage is formed. In the first end insulating member 300 shown in FIG. 13, the inner wall portion 320 is formed by the first cutout portion 341 in which the inner wall portion inner peripheral surface 321 side and the first inner wall portion side surface 323 side are notched. A second interphase insulating member guide composed of a first interphase insulating member guide passage and a second notched portion 342 having a second inner wall portion side surface 324 side cut out on the inner peripheral surface 321 side of the inner wall portion. A passage is formed. Alternatively, although not shown, a first groove (slit) formed on the side surface 323 of the first inner wall portion, extending along the circumferential direction and opening on both sides in the axial direction. A second groove (slit) formed by opening in the interphase insulating member guide passage of 1 and the side surface 324 of the second inner wall portion, extending along the circumferential direction, and opening on both sides in the axial direction. An interphase insulating member guide passage is formed.
In the conventional centralized winding stator, the interphase insulating member 50 is inserted into the slot by the following method.
In a state where the interphase insulating member 50 is compressed so that the distance between the first edge portion and the second edge portion is shortened, one end of the first edge portion and the second edge portion is set in the circumferential direction. A second notch 342 (second interphase insulating member guide passage) of the inner wall portion 320 of the first end insulating member 300 on one side in the circumferential direction of the first end insulating member 300 adjacent to the above. After arranging in the first notch 341 (first interphase insulating member guide passage) of the inner wall portion 320 of the first end insulating member 300 on the other side in the circumferential direction, the interphase insulating member 50 is placed along the axial direction. Move.

Japanese Unexamined Patent Publication No. 2012-55098

In the conventional interphase insulation insertion method, the inner wall portion 320 of the first end insulating member 300 has the inner wall portion 320 (inner wall portion outer peripheral surface 322) and the teeth tip portion 24 of the stator core 20 (first tooth tip outer peripheral portion). An interphase insulating member guide passage (notch portion) extending along the axial direction so as to communicate with the first gap S1 and the second gap S2 defined by the surface 24d and the outer peripheral surface 24e of the second tooth tip portion). Alternatively, it is necessary to form a groove). Therefore, the length of the inner wall portion 320 of the first end insulating member 300 along the radial direction (the distance between the inner peripheral surface 321 of the inner wall portion and the outer peripheral surface 322 of the inner wall portion along the radial direction) becomes longer. The area occupied by the inner wall portion 320 of the first end insulating member 300 in the slot 25 was large.
In recent years, there has been a demand for an increase in the number of turns of the stator winding. Therefore, the present inventor has studied various methods for inserting an interphase insulating member that can reduce the occupied area in the slot of the inner wall portion of the end insulating member. As a result, instead of the conventional method of inserting the interphase insulating member into the slot via the interphase insulating member guide passage formed in the inner wall portion of the end insulating member, the radial inner peripheral side is inserted through the slot opening. By using the method of inserting into the slot from the slot, it is not necessary to form an interphase insulating member guide passage in the inner wall portion of the end insulating member, and the length of the inner wall portion of the end insulating member along the radial direction is shortened. It has been found that the occupied area of the inner wall portion of the end insulating member in the slot can be reduced.
The present invention has been devised in view of such a point, and an object of the present invention is to provide a method for inserting an interphase insulating member and a method for manufacturing an electric motor, which can increase the number of turns of a stator winding.

The first invention relates to a method of inserting an interphase insulating member in a stator, particularly a centralized winding stator in which the stator winding is wound by a centralized winding method.
The stator includes a stator core, a first end insulating member, a second end insulating member, a stator winding, and an interphase insulating member. It should be noted that preferably, a slot insulating member to be inserted into the slot is provided.
The stator core has a yoke, a plurality of teeth, and a plurality of slots when viewed in a cross section perpendicular to the axial direction. The yoke extends along the circumferential direction. The teeth are formed by a teeth base extending radially from the yoke to the inner peripheral side in the radial direction, and a teeth tip portion provided on the radial inner peripheral side of the teeth base and extending along the circumferential direction. To. The tooth tip has an inner peripheral surface of the tip of the tooth on the inner peripheral side in the radial direction, and has a first outer peripheral surface of the tip of the tooth on the outer peripheral side in the radial direction and one side in the circumferential direction. The outer peripheral surface of the tip of the second tooth is provided on the other side in the direction. The slot is formed by adjacent teeth in the circumferential direction, and has a slot opening between the tips of the adjacent teeth.
The first end insulating member and the second end insulating member have an outer wall portion, a plurality of inner wall portions, and a plurality of connecting portions. The outer wall portion extends along the circumferential direction and the axial direction. The inner wall portion is arranged on the inner peripheral side in the radial direction from the outer wall portion, and extends along the circumferential direction and the axial direction. The inner wall portion has an inner peripheral surface of the inner wall portion on the inner peripheral side in the radial direction and an outer peripheral surface of the inner wall portion on the outer peripheral side in the radial direction. The connecting portion extends along the radial direction and connects the outer wall portion and the inner wall portion. The first end insulating member and the second end insulating member have a stator core yoke having an outer wall portion, a connecting portion, and an inner wall portion on one side in the axial direction and the other side in the axial direction of the stator core. , Arranged so as to face the tooth base and the tooth tip. Preferably, as the first end insulating member and the second end insulating member, an end insulating member having the same structure is used.
The stator winding is wound with the first end insulating member and the second end insulating member arranged on one axial side and the other axial direction of the stator core. Preferably, the stator winding has a recess (first recess) formed by the outer wall portion, the inner wall portion and the connecting portion of the first end insulating member, and the outer wall portion of the second end insulating member. It is wound so as to pass through a recess (second recess) formed by the inner wall portion and the connecting portion.
In the state where the stator winding is wound, the inner wall portion of the first end insulating member arranged on one side in the axial direction and the second end insulation arranged on the other side in the axial direction with the tip of the tooth interposed therebetween. A first gap and a second gap defined by the inner wall portion of the first end insulating member, the inner wall portion of the second end insulating member, and the tip of the tooth are formed between the inner wall portion of the member. It is configured to. The first gap is the outer peripheral surface of the inner wall of the inner wall of the first end insulating member, the outer peripheral surface of the inner wall of the inner wall of the second end insulating member, and the outer peripheral surface of the first tooth tip of the tooth tip. The second gap is defined by the outer peripheral surface of the inner wall of the inner wall of the first end insulating member, the outer peripheral surface of the inner wall of the inner wall of the second end insulating member, and the second tooth of the tip of the tooth. It is defined by the outer peripheral surface of the tip.
The interphase insulating member includes a first edge portion including a first edge portion on one side in the circumferential direction, a second edge portion including a second edge portion on the other side in the circumferential direction, and a first edge portion and a first edge portion. The first edge portion and the first so that the quadrangular insulating film having the first central portion and the second central portion provided between the two edge portions has a V-shaped cross section. First bend between the central portion of the, second bend between the first central portion and the second central portion, and the bend between the second central portion and the second edge portion. It is formed by bending at the part. The "first edge portion on one side in the circumferential direction" and the "second edge portion on the other side in the circumferential direction" are located on one side in the circumferential direction among the two edges arranged apart from each other in the circumferential direction. An edge portion to be arranged and an edge portion arranged on the other side in the circumferential direction are shown.
In the present invention, the interphase insulating member is compressed between the first central portion and the second central portion in a state where the interphase insulating member is compressed so that the distance between the first edge portion and the second edge portion is shortened. It is inserted into the slot from the second bent portion side, through the slot opening, and from the radial inner peripheral side. When the first edge portion and the second edge portion pass through the slot opening, the compressive force applied to the interphase insulating member is reduced. As a result, the first edge portion and the second edge portion move due to the elastic recovery force, and the first edge portion is inserted into one of the first gap and the second gap, and the second edge portion is inserted. The edge of the is inserted into the other gap. Further, the first central portion and the second central portion are arranged so as to extend along the radial direction between the stator windings of different phases inserted in the slot. By arranging the first edge portion and the second edge portion of the interphase insulating member in one and the other of the first gap and the second gap, the interphase insulating member moves in the axial direction and the circumferential direction. Is regulated. Further, the first central portion and the second central portion of the interphase insulating member are arranged between the stator windings of adjacent and different phases, so that the adjacent stator windings are insulated from each other.
In the present invention, since the interphase insulating member is inserted into the slot from the radial inner peripheral side through the slot opening, the interphase insulating member is insulated from the inner wall of the end insulating member like a conventional centralized winding stator. An interphase insulating member extending along the axial direction for arranging the first edge portion and the second edge portion of the member in one gap and the other gap of the first gap and the second gap. There is no need to provide a guide passage. As a result, the length of the inner wall portion of the first and second end insulating members along the radial direction is shortened, and the occupied area of the inner wall portion of the first and second end insulating members in the slot is reduced. Can be made to. That is, the effective area around which the stator winding can be wound in the slot is increased, and the number of turns of the stator winding can be increased.
In another aspect of the first invention, the width of the first edge portion and the width of the second edge portion of the interphase insulating member is such that the interphase insulating member is placed between the first edge portion and the second edge portion. Inserted into the slot from the radial inner peripheral side through the slot opening from the second bent portion between the first central portion and the second central portion in a state of being compressed so as to shorten the interval. At that time, the elastic recovery force is set so that the first edge portion is inserted into one gap and the second edge portion is inserted into the other gap.
The "length of the first edge portion" indicates the length between the first edge portion and the first central portion, and the "width of the second edge portion" is the second edge portion and the second edge portion. The length between the central part of 2 is shown.
In this embodiment, the interphase insulating member is compressed so as to be able to pass through the slot opening, and is radially inner circumference from the bent portion between the first central portion and the second central portion via the slot opening. By inserting into the slot from the side, the first edge and the second edge of the interphase insulating member are automatically inserted into one gap and the other gap. This facilitates the work of inserting the interphase insulating member into the slot, which is difficult with the conventional method of inserting the interphase insulating member using the interphase insulating member guide passage formed on the inner wall portion of the end insulating member. It is possible to insert the interphase insulating member into the slot by a machine.
The second invention relates to an electric motor manufacturing method for manufacturing an electric motor, particularly a centralized winding electric motor in which a stator winding is wound by a centralized winding method.
The present invention provides a stator core in which a stator winding is wound with a first end insulating member and a second end insulating member arranged on one side in the axial direction and the other side in the axial direction. Steps to insert the interphase insulating member into the slot of the stator core around which the stator winding is wound, and the step to manufacture the electric motor by assembling the rotor to the stator core into which the interphase insulating member is inserted. And have. Then, in the step of inserting the interphase insulating member into the slot of the stator core, any of the above-mentioned interphase insulating member insertion methods is used.
The present invention has the same effect as the above-mentioned interphase insulating member insertion method.

In the interphase insulating member insertion method and the electric motor manufacturing method of the present invention, the number of turns of the stator winding can be increased while winding the stator winding in a centralized winding method.

It is a figure which shows one Embodiment of the stator which constitutes the electric motor of this invention. It is an enlarged view of the part shown by the arrow II of FIG. FIG. 2 is a cross-sectional view taken from line III-III. It is an enlarged view of the part indicated by the arrow IV of FIG. It is a figure which shows one Embodiment of the interphase insulation member, FIG. 5 is a cross-sectional view taken along the line VI-VI. It is a figure which shows the state which compressed the interphase insulating member. FIG. 7 is a cross-sectional view taken along the line XIII-XIIIIX. It is a figure explaining the operation which inserts an interphase insulation member into a slot. It is a figure explaining the operation which inserts an interphase insulation member into a slot. It is a figure explaining the operation which inserts an interphase insulation member into a slot. It is a perspective view of the conventional stator. FIG. 12 is an enlarged view of a main part of a cross-sectional view seen from line XIII-XIII.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the present specification, the description "axial direction" refers to a rotation center line passing through the rotation center O (see FIG. 3) of the rotor in a state where the rotor is arranged so as to be rotatable relative to the stator. The direction of P (see FIG. 1) is shown. The description "circumferential direction" refers to the center of rotation O as a center when viewed in a cross section perpendicular to the axial direction (see FIG. 3) in a state where the rotor is arranged so as to be rotatable relative to the stator. Indicates the circumferential direction. The description "radial direction" indicates a direction passing through the center of rotation O when viewed in a cross section perpendicular to the axial direction in a state where the rotor is arranged so as to be rotatable relative to the stator. The description "diameter inner circumference side" indicates the rotation center O side along the radial direction, and the description "diameter outer circumference side" indicates the side opposite to the rotation center O along the radial direction.
Regarding the end insulating member, the descriptions "axial direction", "circumferential direction", and "diameter direction" mean that the end insulating member is arranged at a position facing the core end face of the stator core. "Axial direction", "circumferential direction" and "diameter direction" are shown.
Further, in the following, in the cross section perpendicular to the axial direction (FIGS. 3 and 4), the clockwise direction is referred to as "one side in the circumferential direction" and the counterclockwise direction is referred to as "the other side in the circumferential direction". "One side in the direction" and "the other side in the circumferential direction" may be in opposite directions.

Embodiment 10 of the stator constituting the electric motor of the present invention will be described with reference to FIGS. 1 to 4. Note that FIG. 1 is a perspective view of the stator 10 of the embodiment. FIG. 2 is an enlarged view of the portion indicated by the arrow II of FIG. 1, FIG. 3 is a cross-sectional view of FIG. 2 as viewed from lines III-III, and FIG. 4 is an arrow of FIG. It is an enlarged view which enlarged the part shown by IV.
The electric motor of the present invention includes a stator 10 shown in FIG. 1 and a rotor (not shown) that is rotatably supported relative to the stator 10. As the rotor, a rotor corresponding to the type of the electric motor is used.

The stator 10 of the present embodiment is composed of a stator core 20, a slot insulating member 30, a stator winding 40, an interphase insulating member 50, a first end insulating member 100, and a second end insulating member 200. ing.
The stator core 20 is composed of a plurality of laminated electromagnetic steel sheets, and has core end faces on both sides in the axial direction. In FIG. 1, the core end surface 20A is provided on one side in the axial direction, and the core end surface 20B is provided on the other side in the axial direction.
The stator core 20 has a yoke 21, a plurality of teeth 22, and a plurality of slots 25. The yoke 21 extends along the circumferential direction when viewed in a cross section perpendicular to the axial direction (FIGS. 3 and 4). The teeth 22 are provided on the radial inner peripheral side (rotation center side) extending from the yoke 21 in the radial direction, and on the radial inner peripheral side of the tooth base 23, and extend along the circumferential direction. It is formed by the existing teeth tip portion 24.
The teeth base 23 includes a first tooth base side surface formed on one side in the circumferential direction (teeth base side surface on one side in the circumferential direction) 23a, and a second tooth base side surface formed on the other side in the circumferential direction (the other side in the circumferential direction). The tooth base side surface) 23b.
The tooth tip portion 24 includes a tooth tip inner peripheral surface 24a formed on the inner peripheral side in the radial direction, a first tooth tip side surface (teeth tip side surface on one side in the circumferential direction) 24b formed on one side in the circumferential direction. The second tooth tip side surface formed on the other side in the circumferential direction (the side surface of the tooth tip on the other side in the circumferential direction) 24c, and the outer peripheral side in the radial direction formed on one side in the circumferential direction (first tooth tip side surface). The outer peripheral surface of the tip of the first tooth (formed between 24b and the side surface 23a of the base of the first tooth) 24d, the outer peripheral surface of the tip of the tooth on one side in the circumferential direction, on the outer peripheral side in the radial direction, on the other side in the circumferential direction. The formed second tooth tip outer peripheral surface (formed between the second tooth tip side surface 24c and the second tooth base side surface 23b) (the outer peripheral surface of the tooth tip on the other side in the circumferential direction) 24e Have.
Slots 25 are formed by the teeth 22 adjacent to each other in the circumferential direction. The slot 25 has a slot opening 25a between adjacent tooth tips 24. The stator winding 40 is inserted into the slot 25 via the slot insulating member 30. Further, an interphase insulating member 50 arranged between the stator windings 40 of different adjacent phases is inserted into the slot 25. The interphase insulating member 50 will be described later.
The rotor insertion space 20a into which the rotor is inserted is formed by the inner peripheral surface 24a of the tooth tip portion 24 of the tooth tip portion 24.
Positioning recesses 26 are formed in the core end faces 20A and 20B of the stator core 20.

The first end insulating member 100 and the second end insulating member 200 are arranged on one side in the axial direction and the other side in the axial direction of the stator core 20, respectively. In the present embodiment, the first end insulating member 100 and the second end insulating member 200 have the same configuration. Therefore, the configuration of the first end insulating member 100 will be described below. In the following description, when the same components as the components of the first end insulating member 100 are described among the components of the second end insulating member 200, the first end insulating member is used. A code attached to the component and a code other than the third digit are the same.
Even when the first end insulating member 100 and the second end insulating member do not have the same configuration, the basic configurations of both are the same.
The first end insulating member 100 is formed of a resin having insulating properties (called a "resin bobbin") and has an insulating member end face 100A. The first end insulating member 100 is fixed so that the insulating member end face 100A faces the core end face 20A of the stator core 20 on one side in the axial direction of the stator core 20 or faces the core end face 20B. It is arranged on the other side of the child core 20 in the axial direction.

The first end insulating member 100 has an outer wall portion 110, a plurality of inner wall portions 120, and a plurality of connecting portions 130.
The outer wall portion 110 extends along the circumferential direction and the axial direction. The outer wall portion 110 has an outer wall portion inner peripheral surface 111 formed on the radial inner peripheral side and an outer wall portion outer peripheral surface 112 formed on the radial outer peripheral side.
The inner wall portion 120 is arranged on the inner peripheral side (rotation center side) in the radial direction from the outer wall portion 110, and extends along the circumferential direction and the axial direction. The inner wall portion 120 includes an inner wall portion inner peripheral surface 121 formed on the radial inner peripheral side, an inner wall portion outer peripheral surface 122 formed on the radial outer peripheral side, and a first inner wall portion side surface (periphery) formed on one side in the circumferential direction. Inner wall side surface on one side in the direction) 123, second inner wall side surface (inner wall side surface on the other side in the circumferential direction) 124 formed on the other side in the circumferential direction, insulation member end face 100A side (fixed core) along the axial direction. On the 20 side), the first inner wall end surface (inner wall end surface on one side in the circumferential direction) 125 formed on one side in the circumferential direction, and the insulating member end surface 100A side (fixer core 20 side) along the axial direction. It has a second inner wall portion end face (inner wall portion end face on the other side in the circumferential direction) 126 formed on the other side in the circumferential direction. The rotor insertion space 100a into which the rotor is inserted is formed by the inner peripheral surface 121 of the inner wall portion 120.
The connecting portion 130 extends along the radial direction and connects the outer wall portion 110 and the inner wall portion 120. The connecting portion 130 includes a first connecting portion side surface (connecting portion side surface on one side in the circumferential direction) 131 formed on one side in the circumferential direction, and a second connecting portion side surface (connecting portion side surface on the other side in the circumferential direction) formed on the other side in the circumferential direction. 132, the inner peripheral surface of the connecting portion 133 formed on the inner peripheral side in the radial direction. In the present embodiment, the inner peripheral surface 133 of the connecting portion is formed flush with the inner peripheral surface 121 of the inner wall portion.
When the stator winding 40 is wound around the teeth 22 (specifically, the teeth base 23) by the outer wall portion 110, the inner wall portion 120, and the connecting portion 130, a recess in which the stator winding 40 is accommodated (passed) is provided. It is formed (Fig. 2).
The insulating member end surface 100A of the first end insulating member 100 is formed with a positioning protrusion 140 that can be fitted into the positioning recess 26 formed in the core end surface 20A or 20B of the stator core 20. By fitting the positioning protrusion 140 into the positioning recess 26, the arrangement position of the first end insulating member 100 with respect to the stator core 20 can be easily set. As a result, the outer wall portion 110, the connecting portion 130, and the inner wall portion 120 of the first end insulating member 100 are easily arranged at positions facing the yoke 21, the teeth base 23, and the teeth tip 24 of the stator core 20. To.

The stator winding 40 has a stator core 20 in which a first end insulating member 100 and a second end insulating member 200 are arranged on one axial side and the other axial direction of the stator core 20. It is wound around the teeth 22 (teeth base 23) of the above. Specifically, it is wound via the connecting portion 130 of the first end insulating member 100 and the connecting portion 230 of the second end insulating member 200.
At this time, the inner wall portion 120 of the first end insulating member 100 is arranged at the position shown in FIG. 4 with respect to the teeth 22 of the stator core 20. That is, the outer peripheral surface 122 of the inner wall portion 120 of the inner wall portion 120 of the first end insulating member 100 is the outer peripheral surface 24d of the first tooth tip portion of the tooth tip portion 24 of the stator core 20 and the outer peripheral surface of the second tooth tip portion. It is arranged on the outer peripheral side in the radial direction from 24e. The inner wall portion 220 of the second end insulating member 200 is also arranged in the same manner.
The stator winding 40 is wound around a recess formed by an outer wall portion 110, an inner wall portion 120, and a connecting portion 130 of the first end insulating member 100. That is, the first inner wall portion outer peripheral surface 122 of the inner wall portion 120 of the first end insulating member 100 defines the boundary of the region (winding region) in which the stator winding 40 can be wound in the slot 25.
Therefore, in the state where the stator winding 40 is wound, it is arranged on the inner wall portion 120 of the first end insulating member 100 arranged on one side in the axial direction of the stator core 20 and on the other side in the axial direction. A first gap S1 and a second gap S2 are formed between the inner wall portion 220 of the second end insulating member 200. The first gap S1 is formed by the inner wall outer peripheral surface 122 of the inner wall portion 120 of the first end insulating member 100, the inner wall outer peripheral surface 222 of the inner wall portion 220 of the second end insulating member 200, and the stator core 20. It is defined by the outer peripheral surface 24d of the first tooth tip portion of the tooth tip portion 24. Further, the second gap S2 includes an inner wall outer peripheral surface 122 of the inner wall portion 120 of the first end insulating member 100, an inner wall outer peripheral surface 222 of the inner wall portion 220 of the second end insulating member 200, and a stator core. It is defined by the outer peripheral surface 24e of the second tooth tip portion of the tooth tip portion 24 of 20.

Next, the interphase insulating member 50 used in the stator 10 of the present embodiment will be described with reference to FIGS. 5 and 6. FIG. 5 is a perspective view of the interphase insulating member 50, and FIG. 6 is a cross-sectional view of FIG. 5 as viewed from the VI-VI line.
The interphase insulating member 50 shown in FIG. 5 is formed by bending a quadrangular insulating film. That is, the interphase insulating member 50 includes a first edge portion 51a including a first edge portion 50a, a second edge portion 51d including a second edge portion 50b, and a first edge portion 51a and a second edge portion. A first bent portion 52a, which has a first central portion 51b and a second central portion 51c provided between 51d, and is between a first edge portion 51a and a first central portion 51b. At the location of the second bent portion 52b between the central portion 51b and the second central portion 51c of 1 and the third bent portion 52c between the second central portion 51c and the second edge portion 51d. It is bent so that the cross section has a V shape. In the present embodiment, as shown in FIG. 6, the first central portion 51b is bent at an angle θ1 with respect to the first edge portion 51a, and the second central portion 51b is bent with respect to the first central portion 51b. The portion 51c is bent at an angle θ2, and the second edge portion 51d is bent at an angle θ3 with respect to the second central portion 51c.

Next, the operation of inserting the interphase insulating member 50 into the slot 25 will be described.
In the present embodiment, the V-shaped interphase insulating member 50 is arranged so that the first edge portion 50a and the second edge portion 50b extend in the axial direction. That is, the first edge portion 50a of the interphase insulating member 50 is arranged on one side in the circumferential direction, and the second edge portion 50b is arranged on the other side in the circumferential direction.
The first edge portion 50a arranged on one side in the circumferential direction corresponds to the "first edge portion on one side in the circumferential direction" of the present invention, and the second edge portion 50b arranged on the other side in the circumferential direction corresponds to the "first edge portion on one side in the circumferential direction". , Corresponds to the "second edge on the other side in the circumferential direction" of the present invention.

As described above, when the stator winding 40 is wound with the first end insulating member 100 and the second end insulating member 200 arranged on both sides of the stator core 20 in the axial direction, the inside of the slot 35 ( Specifically, in the space surrounded by the slot insulating member 30 inserted in the slot 35), the inner wall portion 120 of the first end insulating member 100, the inner wall portion 220 of the second end insulating member 200, and the teeth. A first gap S1 and a second gap S2 defined by the tip portion 24 are formed.
In the conventional centralized winding stator, an interphase insulating member guide passage extending along the axial direction is formed on the inner wall portion of the end insulating member so as to communicate with the first gap S1 and the second gap S2. , The first edge portion and the second edge portion of the interphase insulating member were arranged in one gap and the other gap via the interphase insulating member guide passage.
In the present invention, by inserting the interphase insulating member into the slot from the radial inner peripheral side through the slot opening, the first edge portion and the second edge portion of the interphase insulating member are inserted into one gap and one gap. It is placed in the other gap.

The operation of inserting the interphase insulating member 50 into the slot 25 from the radial inner peripheral side via the slot opening 25a will be specifically described with reference to FIGS. 9 to 11.
In the present embodiment, the width L1 of the first edge portion 51a and the width L2 of the second edge portion 51d shown in FIG. 6 are slot openings in a state where the interphase insulating member 50 is compressed. When moving from the inner peripheral side in the radial direction into the slot 25 via the 25a, the length at which the first edge portion 50a is inserted into one gap and the second edge portion 50b are the other due to the elastic recovery force. It is set to the length to be inserted into the gap of. The length L1 of the first edge portion 51a is the length between the first edge portion 50a and the first central portion 51b, and the width L2 of the second edge portion 51d is the second edge portion. It is the length between 50b and the second central portion 51c.
FIG. 9 shows a state before the first edge portion 50a and the second edge portion 50b pass through the slot opening 25a, and FIG. 9B shows FIG. 9B in the direction of the arrow (b) in FIG. 9A. 9 (c) is a cross-sectional view of FIG. 9 (a) viewed from the line (c)-(c). FIG. 10 shows a state in which the first edge portion 50a and the second edge portion 50b have passed through the slot opening 25a, and FIG. 10B shows FIG. 10A as viewed from the direction of the arrow (b). FIG. 10 (c) is a cross-sectional view taken along the line (c)-(c) of FIG. 10 (a). FIG. 11 shows a state in which the first edge portion 51a and the second edge portion 51d have passed through the slot opening 25a, and FIG. 11B shows FIG. 11A as viewed from the direction of the arrow (b). 11 (c) is a cross-sectional view taken along the line (c)-(c) of FIG. 11 (a).

A stator 10 around which the stator winding 40 is wound is prepared in a state where the first and second end insulating members 100 and 200 are arranged on both sides of the stator core 20 in the axial direction. And.
First, as shown in FIG. 7, the interphase insulating member 50 is compressed so that the distance between the first edge portion 50a and the second edge portion 50b is shortened. At this time, the interphase insulating member 50 is compressed so that it can pass through the slot opening 25a. For example, as shown in FIG. 8, the first central portion 51b is bent at an angle α1 (> θ1) with respect to the first edge portion 51a, and the second central portion 51b is bent with respect to the first central portion 51b. The central portion 51c is bent at an angle α2 (> θ2), and the second edge portion 51d is compressed so as to be bent at an angle α3 (> θ3) with respect to the second central portion 51c. At this time, when the compressive force is released, the interphase insulating member 50 is compressed so as to be able to return to its original shape by the elastic recovery force.
Then, the compressed interphase insulating member 50 is moved from the second bent portion 52b between the first central portion 51b and the second central portion 51c to the inner peripheral side in the radial direction via the slot opening 25a. Move into slot 25 from.

In the state shown in FIG. 9, since the first edge portion 50a and the second edge portion 50b do not pass through the slot opening 25a, the interphase insulating member 50 keeps the compressed state.
In the state shown in FIG. 10, since the first edge portion 50a and the second edge portion 50b pass through the slot opening 25a, the first edge portion 50a is moved to the first by the elastic recovery force. Rotates around the first bent portion 52a between the edge portion 51a and the first central portion 51b in a direction away from the first central portion 51b, and the second edge portion 50b is the second. Rotates around a third bent portion 52c between the edge portion 51d and the second central portion 51c in a direction away from the second central portion 51c. Here, since the elastic recovery force of the interphase insulating member 50 and the width L1 of the first edge portion 51a and the width L2 of the second edge portion 51d are appropriately set, the first edge portion 50a and the second edge portion 50a and the second edge portion 50a After the edge portion 50b has passed through the slot opening 25a, when the elastic restoring force returns to the original shape, the first edge portion 50a and the second edge portion 50b have the first gap S1 and the second gap S2. It is automatically inserted into one and the other.
In the state shown in FIG. 11, the first edge portion 51a and the second edge portion 51d pass through the slot opening 25a. Therefore, the first central portion 51b and the second central portion 51c are inserted so as to extend along the radial direction between the stator windings 40 of different phases in the slot 25 in the compressed state. Rotates around a second bent portion 52b between the first central portion 51b and the second central portion 51c in a direction away from each other. As a result, the first edge portion 51a and the second edge portion 51d are pushed into one gap and the other gap, and the movement of the interphase insulating member 50 along the axial direction and the movement along the circumferential direction are ensured. Be regulated.

As described above, in the present embodiment, the interphase insulating member 50 is moved from the inner peripheral side in the radial direction into the slot 25 via the slot opening 25a, so that the interphase insulating member 50 is the first on one side in the circumferential direction. The edge portion 50a of 1 and the second edge portion 50b on the other side in the circumferential direction are defined by the inner wall portions 120 and 220 of the end insulating members 100 and 200 and the tooth tip portion 24, and the first gap S1 and the second. It is configured to be arranged in the gap S2 of.
This eliminates the need for the interphase insulating member guide passage, which was conventionally formed on the inner wall portion of the end insulating member. Therefore, the lengths of the inner wall portions 120 and 220 of the end insulating members 100 and 200 along the radial direction can be shortened, and the occupied area of the inner wall portions 120 and 220 in the slot 25 can be reduced, and the occupied area of the inner wall portions 120 and 220 in the slot 25 can be reduced. The number of turns of the stator winding 40 can be increased.
Further, the interphase insulating member 50 is simply moved from the inner peripheral side in the radial direction into the slot via the slot opening 25a, and the first edge portion 50a on one side in the circumferential direction and the circumferential direction of the interphase insulating member 50 are simply moved. Since the second edge portion 50b on the other side can be automatically inserted into the first gap S1 and the second gap S2, the slot of the interphase insulating member 50 using a machine, which has been difficult in the past. The insertion work into the 25 becomes possible.

The present invention is not limited to the configuration described in the embodiment, and various changes, additions, and deletions can be made.
The configuration of the end insulating member is not limited to the configuration described in the embodiment.
As the end insulating members arranged on both sides in the axial direction of the stator core, the end insulating members having the same structure may be used, or the end insulating members having different structures may be used.
As the interphase insulating member, a V-shaped bent interphase insulating member is preferably used, but the interphase insulating member is not limited thereto.
The present invention can be configured as various types of electric motors.

10 Motor 20 Stator core 20A, 20B Core end face 20a Rotor insertion space 21 York 21a York inner peripheral surface 22 Teeth 23 Teeth base 23a First tooth base side surface (one side of the tooth base in the circumferential direction)
23b Second tooth base side surface (teeth base side surface on the other side in the circumferential direction)
24 Teeth tip 24a Teeth tip inner peripheral surface 24b First tooth tip side surface (teeth tip side surface on one side in the circumferential direction)
24c Second tooth tip side surface (teeth tip side surface on the other side in the circumferential direction)
24d Outer peripheral surface of the tip of the first tooth (outer peripheral surface of the tip of the tooth on one side in the circumferential direction)
24e Outer peripheral surface of the tip of the second tooth (outer surface of the tip of the tooth on the other side in the circumferential direction)
25 Slot 25a Slot opening 26 Positioning recess 30 Slot insulation member 40 Stator winding 50 Interphase insulation member 50a First edge 50a Second edge 50c First end 50d Second end 51a First Edge portion 51b First central portion 51c Second central portion 51d Second edge portion 52a First bent portion 52b Second bent portion 52c Third bent portion 60 Insulation sheet 60A First surface 60B Second Surface 60a First edge 60b Second edge 60c First end 60d Second end 61a First part 61b Second part 61c Third part 61d Fourth part 62a First bend Line 62b Second bending line 62c Third bending line 100, 200, 300, 400 End insulation member 100A Insulation member end surface 100a Rotor insertion space 110, 210, 310, 410 Outer wall part 111 Outer wall part Inner peripheral surface 112 Outer wall part Outer surface 120, 220, 320, 420 Inner wall 121, 321 Inner wall inner peripheral surface 122, 322 Inner wall outer peripheral surface 123, 323 First inner wall side surface (inner wall side surface on one side in the circumferential direction)
124, 324 Second inner wall side surface (inner wall side surface on the other side in the circumferential direction)
125 First inner wall end face (inner wall end face on one side in the circumferential direction)
126 Second inner wall end face (inner wall end face on the other side in the circumferential direction)
130, 230, 330, 430 Connecting part 131, 331 First connecting part side surface (one side of connecting part in the circumferential direction)
132, 332 Second connecting part side surface (connecting part side surface on the other side in the circumferential direction)
133 Connecting part inner peripheral surface 140, 240 Positioning protrusion 341 First notch part (first interphase insulating member guide passage)
241a Notch surface 342 Second notch (second interphase insulating member guide passage)
342a Notch surface S1 First gap S2 Second gap

Claims (3)

Interphase insulation in the slot of the stator core around which the stator windings are wound with the first end insulating member and the second end insulating member arranged on one side in the axial direction and the other side in the axial direction. It is a method of inserting an interphase insulating member into which a member is inserted.
The stator core has a yoke extending along the circumferential direction, a teeth base extending radially inward from the yoke, and a teeth base extending radially inward from the yoke when viewed in a cross section perpendicular to the axial direction. A slot opening between a plurality of teeth formed on the inner peripheral side in the radial direction and extending along the circumferential direction and teeth adjacent to each other in the circumferential direction. Has multiple slots and has
The tooth tip has an inner peripheral surface of the tip of the tooth on the inner peripheral side in the radial direction, has an outer peripheral surface of the first tip of the tooth on the outer peripheral side in the radial direction, and has an outer peripheral surface of the tip of the first tooth on one side in the circumferential direction. It has a second tooth tip outer peripheral surface on the other side in the circumferential direction.
The first end insulating member and the second end insulating member are arranged on an outer wall portion extending along the circumferential direction and the axial direction and on the inner peripheral side in the radial direction from the outer wall portion, and are arranged in the circumferential direction and the axial direction. It has a plurality of inner wall portions extending along the axial direction and a plurality of connecting portions extending along the radial direction and connecting the outer wall portion and each inner wall portion.
The inner wall portion has an inner wall portion outer peripheral surface on the radial outer peripheral side and an inner wall portion inner peripheral surface on the radial inner peripheral side.
In the first end insulating member and the second end insulating member, the outer wall portion, the connecting portion and the inner wall portion are the stator on one side in the axial direction and the other side in the axial direction of the stator core. Arranged so as to face the yoke, the tooth base and the tooth tip of the core.
In a state where the stator winding is wound, it is arranged on the inner wall portion and the other side in the axial direction of the first end insulating member arranged on one side in the axial direction with the tip end portion of the teeth interposed therebetween. Between the inner wall portion of the second end insulating member, the outer peripheral surface of the inner wall portion of the inner wall portion of the first end insulating member, and the inner wall portion of the second end insulating member. The first gap defined by the outer peripheral surface of the inner wall portion and the outer peripheral surface of the first tooth tip portion of the tooth tip portion, the inner wall portion outer peripheral surface of the inner wall portion of the first end insulating member, and the said. A second gap defined by the outer peripheral surface of the inner wall portion of the inner wall portion of the second end insulating member and the outer peripheral surface of the second tooth tip portion of the tooth tip portion is formed.
The interphase insulating member includes a first edge portion including a first edge portion on one side in the circumferential direction, a second edge portion including a second edge portion on the other side in the circumferential direction, and the first edge portion. The first edge so that the quadrangular insulating film having the first central portion and the second central portion provided between the second edge portion and the second edge portion has a V-shaped cross section. A first bent portion between the portion and the first central portion, a second bent portion between the first central portion and the second central portion, the second central portion and the second central portion. It is formed by being bent at the third bent portion between the two edges.
In a state where the interphase insulating member is compressed so that the distance between the first edge portion and the second edge portion is shortened, the interphase insulating member is compressed from the second bent portion side through the slot opening. , Inserted into the slot from the radial inner peripheral side, and the first edge portion is inserted into one of the first gap and the second gap by the elastic recovery force, and the second gap is inserted. A method for inserting an interphase insulating member, which comprises inserting the edge portion of the sword into the other gap. The method for inserting an interphase insulating member according to claim 1.
The width of the first edge portion and the width of the second edge portion of the interphase insulating member are, in a state where the interphase insulating member is compressed, from the radial inner peripheral side to the inside of the slot through the slot opening. The first edge is inserted into the one gap and the second edge is inserted into the other gap by the elastic return force. A method for inserting an interphase insulating member. It is a method of manufacturing an electric motor that manufactures an electric motor.
A step of preparing a stator core around which a stator winding is wound with a first end insulating member and a second end insulating member arranged on one side in the axial direction and the other side in the axial direction.
The step of inserting the interphase insulating member into the slot of the stator core around which the stator winding is wound, and
It is equipped with a step of assembling a rotor to a stator core into which an interphase insulating member is inserted to manufacture an electric motor.
A method for manufacturing an electric motor, wherein the interphase insulating member insertion method according to claim 1 or 2 is used in the step of inserting the interphase insulating member into the slot of the stator core.

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