JP2018137929A - End insulation member, stator and rotary machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for increasing space factor in a slot.SOLUTION: End insulation members placed on both sides of a stator core in the axial direction have an outer wall 50, multiple inner walls 60, and multiple coupling parts 70, respectively. The coupling part 70 has an upper face formed on the opposite side to the bottom face 40A in the axial direction, a first lateral face and a second lateral face. The upper face has a first face 111, a second face 112, and a third face 113. The first face 111 and the third face 113 are extending radially inward from the outside, from the bottom face 40A side to the opposite side thereof in the axial direction. The interval H1 in the axial direction between the radial inside end 112a of the first face 111, and the axial end 112b on the bottom face 40A side is set to satisfy following relation (3/4×D≤H1<5/4×D) (D: diameter of a stator winging 90).SELECTED DRAWING: Figure 9

Description

  The present invention relates to a stator in which a stator winding is wound in a state where end insulating members are disposed on both sides in the axial direction of the stator core, and more particularly, a space factor of the stator winding in a slot of the stator core It relates to technology that enhances.

Stator windings are wound (called “concentrated winding method”) with end insulating members (called “resin bobbins”) arranged on both sides of the stator core in the axial direction. It has been known. The stator core has a yoke extending along the circumferential direction, a plurality of teeth extending from the yoke along the radial direction, and a plurality of slots formed by teeth adjacent in the circumferential direction. The teeth have a teeth base portion extending inward in the radial direction from the yoke, and a teeth tip portion provided on the distal end side of the teeth base portion and extending in the circumferential direction. A slot opening is formed between the tips of the teeth adjacent in the circumferential direction. The end insulating member includes an outer wall portion extending along the circumferential direction and the axial direction, a plurality of inner wall portions disposed inside the outer wall portion and extending along the circumferential direction and the axial direction, and a plurality of outer wall portions and the plurality of outer wall portions. A plurality of connecting portions for connecting the inner wall portions to each other. The outer wall portion, the inner wall portion, and the connecting portion of the end insulating member are disposed to face the yoke, the tooth tip portion, and the tooth base portion of the stator core, respectively.
As a method of winding the stator winding by the concentrated winding method, a method using a needle inserted into the slot from the inside through the slot opening is known.
When the stator winding is wound using a needle inserted into the slot through the slot opening, the range of movement of the needle, particularly the range of movement along the radial direction, is limited. It is difficult to wind up to the outer wall portion side portion of the portion (the yoke side portion of the teeth base portion), that is, to the back of the slot.
Thus, an end insulating member disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2002-272045) has been proposed. In the end insulating member disclosed in Patent Document 1, the length (height) along the axial direction of the connecting portion on the outer wall side on the upper surface opposite to the bottom surface of the connecting portion is on the inner wall portion side. An inclined surface that is inclined so as to be shorter (lower) than a length (height) along the axial direction is formed. Thus, the stator winding can be wound while sliding to the outer wall portion side along the inclined surface formed on the upper surface of the connecting portion, and the outer wall portion side portion of the connecting portion (the yoke side portion of the teeth base portion) ), That is, it can be wound to the back of the slot.

JP 2002-272045 A

In the end insulating member disclosed in Patent Document 1, the stator winding can be slid to the outer wall portion side along the inclined surface formed on the upper surface of the connecting portion. The stator winding can be wound up to the portion (the yoke side portion of the teeth base).
However, even when an end insulating member having an inclined surface formed on the upper surface of the connecting portion is used, the stator windings may not be wound in parallel but may be wound in an intersecting manner. When the stator windings are wound in an intersecting manner, the space factor of the stator windings in the slots is lowered.
As a result of various investigations, the present inventor prevents the second and subsequent rows of stator windings from crossing each other by winding the first row of stator windings in parallel (aligned). It was clarified that the space factor of the stator winding in the slot can be increased. In order to wind the stator windings in the first row in parallel (aligned), a step surface that prevents the movement of the stator windings is provided between the inclined surface and the outer wall portion on the upper surface of the connecting portion. It was found that it was effective to provide it.
Therefore, the present invention provides a technique capable of increasing the space factor in the slot of the stator winding wound in a state where the end insulating members are arranged on both sides in the axial direction of the stator core. Objective.

1st invention of this invention is related with the edge part insulation member arrange | positioned at the axial direction both sides of a stator core.
The end insulating member of the present invention has a bottom surface on the side facing the stator core, an outer wall portion extending along the circumferential direction and the axial direction, and disposed on the inner side of the outer wall portion, in the circumferential direction. And 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 of the plurality of inner wall portions. The outer wall portion, the inner wall portion, and the connecting portion form a recess in which the stator winding is disposed. The end insulating member is preferably formed of a resin having insulating characteristics. The end insulating members are arranged on both sides in the axial direction of the stator core so that the outer wall portion, the inner wall portion, and the connecting portion face the yoke, the teeth base portion, and the tooth tip portion of the stator core.
The connecting portion includes an upper surface formed on the opposite side of the bottom surface along the axial direction, a first side surface formed on one side along the circumferential direction, and a second surface formed on the other side along the circumferential direction. It has the side.
The upper surface is a cross-section including a connecting portion center line passing through the center between the first side surface and the second side surface, and the first upper surface portion, the second upper surface portion, and the inner wall portion side from the outer wall portion side. A third upper surface portion is provided. The first top surface portion extends from the outside to the inside along the radial direction, and extends from the bottom surface side to the side opposite to the bottom surface along the axial direction. That is, the first upper surface portion is formed so that the stator winding moves from the inner wall portion side to the outer wall portion side by sliding along the inclination of the first upper surface. The second upper surface portion extends from the inner end portion along the radial direction of the first upper surface portion toward the bottom surface along the axial direction. The second upper surface portion preferably extends parallel to the axial direction (including “substantially parallel”), but may extend while being inclined with respect to the axial direction. The third upper surface portion extends inward along the radial direction from an end portion of the second upper surface portion on the bottom surface side along the axial direction, and extends on the opposite side to the bottom surface along the axial direction. doing. That is, the third upper surface portion is formed so that the stator winding moves from the inner wall portion side to the outer wall portion side by sliding along the inclination of the third upper surface. The “cross section including the connecting portion center line” means “a cross section passing along the center between the first side surface and the second side surface and extending along the axial direction and the radial direction”.
And the space | interval H1 along the axial direction between the inner side edge part along the radial direction of the 1st upper surface part and the edge part of the bottom face side along the axial direction of the 2nd upper surface part is the following. When the diameter of the stator winding wound around the stator core is D (mm), it is within the range of (3/4 × D) and (5/4 × D), that is, [3/4 × D ≦ H1. ≦ 5/4 × D] is set.
In the present invention, the upper surface of the connecting portion has an inclined third upper surface portion. Thereby, the stator winding can be wound while sliding along the inclination of the third upper surface portion. In addition, a stepped second upper surface portion is connected to the third upper surface portion between the third upper surface portion and the outer wall portion. As a result, the stator windings in the first row are wound in parallel (aligned) with the second upper surface portion at the head, without intersecting. Since the first row of stator windings are wound in parallel (aligned), the second and subsequent rows of stator windings are prevented from being wound in a crossing manner. In particular, the length H1 along the axial direction of the second upper surface portion is set within the range of (3/4 × D) and (5/4 × D). Thus, the first row of stator windings can be reliably wound in parallel (aligned) with the second upper surface portion as the head, and the second and subsequent rows of windings can be wound on the second upper surface portion. Can be wound up to the position on the outer wall side, that is, the back of the slot. Further, the first upper surface portion is inclined and connected to the second upper surface portion. Thus, the second row of stator windings can be wound in parallel, and the third and subsequent rows of stator windings can be prevented from being crossed and wound. Therefore, the space factor of the stator winding in the slot can be increased.
In another form of the first invention, in the cross section including the connecting portion center line, the angle α1 between the radial direction and the third upper surface portion and the angle α2 between the radial direction and the first upper surface portion are ( 2 °) and (8 °), that is, [2 ° ≦ α1, α2 ≦ 8 °].
When the inclination angles α1 and α2 are smaller than (2 °), the stator windings are difficult to slide along the third upper surface portion and the first upper surface portion, and are not wound in parallel but are wound in a crossing manner. Further, when the inclination angles α1 and α2 are larger than (8 °), the stator winding slides down the third upper surface portion and the first upper surface portion, so that they are wound in an intersecting manner. Preferably, the inclination angle α2 is set equal to the inclination angle α1.
In this embodiment, the first row of stator windings can be wound in parallel (aligned) along the inclination of the third upper surface portion, and the second row of stator windings can be It can be wrapped in parallel (aligned) along the slope of the top surface portion.
In another form of the first invention, in the cross section including the connecting portion center line, the distance L1 between the inner end of the first upper surface portion along the radial direction and the inner peripheral surface of the outer wall portion is: When the width of the outer wall portion is T (mm), it is set to satisfy the range of (T) and (2T), that is, [T ≦ L1 ≦ 2T].
In this embodiment, the strength of the end insulating member can be ensured.
In a different form of the first invention, the first side surface includes the first side surface portion, the second side surface portion, and the third side surface portion from the outer wall portion side to the inner wall portion side as viewed from the direction perpendicular to the axial direction. Have. The first side surface portion extends along the radial direction. The first side surface portion is preferably formed so as to extend in parallel (including “substantially parallel”) with the extending direction of the connecting portion center line passing through the center between the first side surface and the second side surface. However, you may form so that it may incline and extend with respect to a connection part center line. The second side surface portion extends from the inner end portion along the radial direction of the first side surface portion to the other side along the circumferential direction. The second side surface portion is preferably formed so as to extend parallel to (including “substantially parallel”) a direction perpendicular to the extending direction of the connecting portion center line. You may form so that it may incline and extend with respect to the direction orthogonal to a present direction. The third side surface portion extends inward along the radial direction from the other side end portion of the second side surface portion along the circumferential direction, and extends to one side along the circumferential direction. Yes. That is, the third side surface portion is formed such that the stator winding moves from the inner wall portion side to the outer wall portion side by sliding along the inclination of the third side surface portion.
The second side surface has a fourth side surface portion, a fifth side surface portion, and a sixth side surface portion from the outer wall portion side to the inner wall portion side as seen from the direction perpendicular to the axial direction. The fourth side surface portion extends along the radial direction. The fourth side surface portion is preferably formed so as to extend parallel to (including “substantially parallel”) the extending direction of the connecting portion center line, but with respect to the extending direction of the connecting portion center line. It may be formed so as to extend in an inclined manner. The fifth side surface portion extends from the inner end portion along the radial direction of the fourth side surface portion to one side along the circumferential direction. The fifth side surface portion is preferably formed so as to extend parallel to (including “substantially parallel”) a direction perpendicular to the extending direction of the connecting portion center line. You may form so that it may incline and extend with respect to the direction orthogonal to a present direction. The sixth side surface portion extends inward along the radial direction from the end portion on one side along the circumferential direction of the fifth side surface portion, and extends toward the other side along the circumferential direction. Yes. That is, the sixth side surface portion is formed such that the stator winding moves from the inner wall portion side to the outer wall portion side by sliding along the inclination of the sixth side surface portion.
And the extension direction of the connection part centerline between the inner side edge part along the radial direction of a 1st side surface part, and the edge part of the other side along the circumferential direction of a 2nd side surface part (A length along the direction perpendicular to the extending direction of the connecting portion central line) W1 along the direction perpendicular to the vertical direction W1, and along the radial direction of the fourth side portion The distance along the direction perpendicular to the extending direction of the connecting portion center line between the inner end portion and the one end portion in the circumferential direction of the fifth side surface portion (the fifth side surface portion (Length along the direction perpendicular to the extending direction of the connecting portion center line) W1 is (3/4 × D) where D (mm) is the diameter of the stator winding wound around the stator core. ) And (5/4 × D), that is, [3/4 × D ≦ W1 ≦ 5/4 × D].
In this embodiment, the stator winding can be wound while sliding along the inclination of the third side surface portion and the sixth side surface portion. In addition, the second side surface portion and the fifth side surface formed in a stepped manner connected to the third side surface portion and the sixth side surface portion between the third side surface portion and the sixth side surface portion and the outer wall portion. It has the side part. Thus, the stator windings in the first row are wound in parallel (aligned) with the second side surface portion and the fifth side surface portion at the head, without intersecting. Further, the lengths W1 of the second side surface portion and the fifth side surface portion along the direction perpendicular to the extending direction of the connecting portion center line are (3/4 × D) and (5/4 × D). By being set within the range, the stator windings in the first row can be reliably wound in parallel (aligned) with the second side surface portion and the fifth side surface portion as the head, The windings in the second and subsequent rows can be wound to the position on the outer wall side beyond the second side surface portion and the fifth side surface portion, that is, to the back of the slot. Therefore, the space factor of the stator winding in the slot can be further increased.
In another form of the first invention, when viewed from a direction perpendicular to the axial direction, the inner side end portion of the first side surface portion along the radial direction on the connecting portion center line, and the fourth side surface portion, The distance L1 between the line connecting the inner end along the radial direction and the inner peripheral surface of the outer wall is (T) and (2T) when the width of the outer wall is T (mm). Within the range, that is, [T ≦ L1 ≦ 2T] is set.
In this embodiment, the strength of the end insulating member can be ensured.
In another form of the first invention, the angle β1 between the connecting portion center line and the third side surface portion and the sixth side surface portion is within the range of (2 °) and (8 °), that is, [2 ° ≦ β1 ≦ 8 °].
In this embodiment, the first row of stator windings can be reliably wound in parallel (aligned) along the inclination of the third side surface portion and the sixth side surface portion.
In another form of the first aspect of the invention, there is a peripheral edge extending from the connecting part to both sides in the circumferential direction between the connecting part and the outer wall part.
In this embodiment, the strength of the end insulating member can be increased.
The second invention of the present invention relates to a stator.
The stator of the present invention includes a stator core, end insulating members disposed on both sides in the axial direction of the stator core, and a stator winding. Any of the above-described end insulating members is used as the end insulating member. The stator of the present invention has the same effect as the end insulating member described above.
The third invention of the present invention relates to a rotating machine.
The rotating machine of the present invention includes the above-described stator and a rotor that is arranged to be rotatable relative to the stator. The rotating machine of the present invention is preferably configured as an electric motor. The rotating machine of the present invention has the same effect as the end insulating member described above.

  In the present invention, the space factor in the slot of the stator winding wound in a state where the end insulating members are disposed on both axial sides of the stator core can be increased.

It is a figure which shows 1st Embodiment of the stator of this invention. It is the II-II sectional view taken on the line of FIG. It is the schematic at the time of seeing the part shown by the arrow III of FIG. FIG. 4 is a schematic view when FIG. 3 is seen in a cross section taken along line IV-IV. It is the schematic at the time of seeing FIG. 3 in the VV sectional view. It is a figure which shows 1st Embodiment of the edge part insulation member of this invention. It is a figure which shows the 1st modification of the edge part insulation member of 1st Embodiment. It is a figure which shows the 2nd modification of the edge part insulation member of 1st Embodiment. It is a figure which shows 2nd Embodiment of the edge part insulation member of this invention. It is a figure which shows the 1st modification of the edge part insulation member of 2nd Embodiment. It is a figure which shows the 2nd modification of the edge part insulation member of 2nd Embodiment. It is a figure which shows 3rd Embodiment of the edge part insulation member of this invention. It is a figure which shows the 1st modification of the edge part insulation member of 3rd Embodiment. It is a figure which shows the 2nd modification of the edge part insulation member of 3rd Embodiment. It is a figure which shows 4th Embodiment of the edge part insulation member of this invention. It is a figure which shows 5th Embodiment of the edge part insulation member of this invention. It is a figure which shows 5th Embodiment of the edge part insulation member of this invention. It is a figure which shows 5th Embodiment of the edge part insulation member of this invention. It is a figure which shows the 2nd basic structure of an edge part insulation member. It is the schematic at the time of seeing FIG. 17 in the XX-XX line cross section. FIG. 18 is a schematic view when FIG. 17 is seen in the XXI-XXI line cross section. It is a figure which shows 6th Embodiment of the edge part insulation member of this invention. It is a figure which shows 7th Embodiment of the edge part insulation member of this invention. It is a figure which shows 8th Embodiment of the edge part insulation member of this invention. It is a figure which shows the 3rd basic structure of an edge part insulation member. It is the schematic at the time of seeing FIG. 24 in the XXVI-XXVI sectional view. It is a figure which shows 9th Embodiment of the edge part insulation member of this invention. It is a figure which shows 10th Embodiment of the edge part insulation member of this invention. It is a graph which shows the relationship between the inclination angle of an inclined surface, the number of turns of the stator winding | coil which can be inserted in a slot, and the efficiency of a rotary machine.

Embodiments of the present invention will be described below with reference to the drawings.
In the present specification, the “axial direction” refers to the rotation center line of the rotor (shown in FIGS. 1 and 2) in a state where the rotor is rotatably arranged relative to the stator. Direction of the rotation center line P). In addition, the “circumferential direction” is centered on the rotation center line when viewed from a direction perpendicular to the axial direction (direction of the rotation center line) in a state where the rotor is arranged to be rotatable relative to the stator. Indicates the circumferential direction. In addition, the “radial direction” refers to the rotation center line when viewed from a direction perpendicular to the axial direction (direction of the rotation center line) in a state where the rotor is arranged to be rotatable relative to the stator. Indicates the direction of passage.
Further, in this specification, the description “parallel” is used as including “substantially parallel”, the description “right angle” is used as including “substantially right angle”, and the description “equal” is “ It is used to include “substantially equal”.

  The rotating machine (not shown) of the present invention includes a stator and a rotor that is arranged to be rotatable relative to the stator. As the rotor, rotors having various configurations can be used. The rotating machine of the present invention is preferably configured as an electric motor.

1st Embodiment of the stator 10 of this invention is described with reference to FIG. 1, FIG. FIG. 1 is a perspective view of the stator 10 of the present embodiment, and FIG. 2 is a cross-sectional view taken along line II-II in FIG.
The stator 10 according to the present embodiment includes a stator core 20, end insulating members 40 disposed on both sides in the axial direction of the stator core 20, a stator winding 90, and the like.
Stator core 20 is constituted by a plurality of laminated electromagnetic steel plates, and has core end faces 20A and 20B on one axial side and the other axial side. The stator core 20 has a yoke 21 extending along the circumferential direction and a plurality of teeth 22 extending along the radial direction when viewed in a cross section perpendicular to the axial direction (FIG. 2). The teeth 22 include a tooth base 23 extending inward (rotation center P side) along the radial direction from the yoke 21, and a tooth tip 24 provided inside the teeth base 23 and extending along the circumferential direction. Have. An arc-shaped tooth tip surface 25 is formed inside the tooth tip 24. A tooth insertion surface 20 a into which a rotor (not shown) is inserted is formed by the tooth tip surface 25.
A slot 26 is formed by the teeth 22 adjacent in the circumferential direction. Further, a slot opening 26 a is formed by the tooth tip 24 of the tooth 22 adjacent in the circumferential direction.
A stator winding 90 is inserted into the slot 26 via a slot insulating member 30.

The end insulating member 40 is formed of a resin having insulating characteristics (also referred to as “resin bobbin”). The end insulating member 40 can also be formed of a material other than resin.
The end insulating member 40 has a bottom surface 40 </ b> A and an outer wall portion 50, a plurality of inner wall portions 60, and a plurality of connecting portions 70. The outer wall portion 50 extends along the circumferential direction and the axial direction. The inner wall portion 60 is disposed on the inner side (the rotation center P side) than the outer wall portion 50, and extends along the circumferential direction and the axial direction. The connecting portion 70 connects the outer wall portion 50 and the inner wall portion 60 and extends along the radial direction. The end insulating members 40 are arranged on both sides in the axial direction of the stator core 20 so that the bottom surface 40A abuts against the core end surface 20A or 20B of the stator core 20.

A first basic structure of the end insulating member 40 will be described with reference to FIGS. FIG. 3 is a schematic view of the portion indicated by the arrow III in FIG. 1 when viewed from the side opposite to the stator core 20. FIG. 4 is a schematic view when FIG. 3 is viewed along the line IV-IV, and FIG. 5 is a schematic view when FIG. 3 is viewed along the line V-V.
The outer wall portion 50 of the end insulating member 40 is disposed at a position corresponding to the yoke 21 of the stator core 20. The outer wall portion 50 has an outer peripheral surface 51 and an inner peripheral surface 52.
The inner wall 60 of the end insulating member 40 is disposed at a position corresponding to the tooth tip 24 of the stator core 20. The inner wall portion 60 has an inner peripheral surface 61 and an outer peripheral surface 62.
The connecting portion 70 of the end insulating member 40 is disposed at a position corresponding to the teeth base portion 23 of the stator core 20. The connecting portion 70 includes an upper surface 110 formed on the opposite side of the bottom surface 40A along the axial direction, a first side surface 120 formed on one side (right side in FIG. 3) along the circumferential direction, and a circumferential direction. And a second side surface 130 formed on the other side (left side in FIG. 3). Further, a first connection surface 140 and a second connection surface 150 are formed between the upper surface 110 and the first side surface 120 and the second side surface 130. The first connection surface 140 and the second connection surface 150 are formed on a circular arc surface (R surface) (including a “substantially circular arc surface”) having a radius r when viewed in a cross section (see FIG. 5) along the circumferential direction. Has been. The first connecting surface 140 and the second connecting surface 150 formed on the arc surface can prevent the stator winding 90 wound around the connecting portion 70 from being damaged.
In FIG. 3, a line K indicates a connecting portion center line passing through the center between the first side surface 120 and the second side surface 130 of the connecting portion 70. 3 is a cross section including the connecting portion center line K, that is, the axial direction and the radial direction passing through the center between the first side surface 120 and the second side surface 130 of the connecting portion 70. It is the cross section extended along. Hereinafter, the cross section including the connecting portion center line K is referred to as a “connecting portion central section”.
The upper surface 110 corresponds to the “upper surface formed on the side opposite to the bottom surface” of the present invention, and the first side surface 120 corresponds to the “first side surface formed on one side along the circumferential direction” of the present invention. Correspondingly, the second side surface 130 corresponds to the “second side surface formed on the other side along the circumferential direction” of the present invention, and the first connection surface 140 corresponds to the “upper surface and the first surface of the present invention. The second connection surface 150 corresponds to the “first connection surface formed between the upper surface and the second side surface” and the “second connection surface formed between the upper surface and the second side surface” of the present invention. Corresponding to

[First Embodiment]
Next, a first embodiment of the end insulating member 40 of the present invention will be described with reference to FIG. FIG. 6 shows a central cross section of the connecting portion of the end insulating member 40 of the first embodiment. The first embodiment has the first basic structure and is characterized by the shape of the upper surface 110 of the connecting portion 70.
In the end insulating member 40 of the present embodiment, the upper surface 110 of the connecting portion 70 has a first upper surface portion 111, a second upper surface portion 112, and a third upper surface portion 113 from the outer wall portion 50 side to the inner wall portion 60 side. have.
The first upper surface portion 111 extends from the inner peripheral surface 52 of the outer wall portion 50 to the inner side (the inner wall portion 60 side) along the radial direction (the left-right direction in FIG. 6). In the present embodiment, the first upper surface portion 111 extends parallel to the radial direction. In the present embodiment, the first upper surface portion 111 extends linearly. The first upper surface portion 111 can also be formed so as to extend in a direction inclined with respect to the radial direction.
The second upper surface portion 112 has an end portion 112a connected to the first upper surface portion 111 and an end portion 112b connected to the third upper surface portion 113, and is in the axial direction (vertical direction in FIG. 6). ). In the present embodiment, the second upper surface portion 112 extends parallel to (in the axial direction. Further, in the present embodiment, the second upper surface portion 112 extends linearly. The upper surface portion 112 of the second upper surface portion 112 may be formed to extend in a direction inclined with respect to the axial direction, and the end portion 112a of the second upper surface portion 112 is an end portion of the first upper surface portion 111. In addition, the end portion 112 b of the second upper surface portion 112 is also an end portion of the third upper surface portion 113.
The third upper surface portion 113 extends from the end 112b of the second upper surface portion 112 to the inner wall portion 60 side along the radial direction, and extends to the opposite side of the bottom surface 40A along the axial direction. ing. That is, the third upper surface portion 113 is formed on an inclined surface that is inclined at an angle (inclination angle) α1 with respect to the radial direction in the cross section of the connecting portion. In the present embodiment, the third upper surface portion 113 is formed on an inclined surface extending linearly.

As a method of winding the stator winding 90 around the connecting portion 70 of the end insulating member 40 (the teeth base 23 of the stator core 20) in a state where the end insulating members 40 are disposed on both axial sides of the stator core 20, When the needle inserted into the slot 26 from the inside through the slot opening 26a is used, the movement range along the radial direction of the needle is limited, so the portion on the outer wall 50 side of the connecting portion 70 (the yoke of the teeth base 23). It is difficult to wind the stator winding 90 directly on the portion 21 side).
In the present embodiment, the third upper surface portion 113 of the upper surface 110 of the connecting portion 70 is a bottom surface from the side opposite to the bottom surface 40A along the axial direction from the inner wall portion 60 side to the outer wall portion 50 side along the radial direction. It inclines so that it may extend to the 40A side.
As a result, the stator winding 90 is sequentially wound from the inner wall portion 60 side to the outer wall portion 50 side (from the tooth tip portion 24 side to the yoke 21 side) while sliding along the inclination of the third upper surface portion 113.

Here, FIG. 29 shows the relationship between the inclination angle α1 of the third upper surface portion 113 with respect to the radial direction, the number of turns of the stator winding 90 that can be inserted into the slot 26 of the stator core 20, and the efficiency of the motor. Has been. In FIG. 29, the horizontal axis indicates the tilt angle (°), the first vertical axis on the left indicates the number of turns, and the second vertical axis on the right indicates efficiency (%).
From FIG. 29, it can be understood that in the region where the inclination angle α1 is smaller than (2 °), the number of turns of the stator winding 90 that can be inserted into the slot 26 and the efficiency of the motor are reduced. When the inclination angle α1 is small, the stator winding 90 becomes difficult to slide along the third upper surface portion 113, and the stator winding 90 is not wound in parallel but is wound in a crossing manner. When the stator winding 90 is wound in an intersecting manner, the number of turns of the stator winding 90 that can be inserted into the slot 26 is reduced. If the number of turns of the stator winding 90 is small, the current necessary for obtaining a predetermined torque increases, resulting in an increase in loss and a reduction in the efficiency of the motor.
Further, it can be understood that in the region where the inclination angle α1 is larger than (8 °), the number of turns of the stator winding 90 that can be inserted into the slot 26 and the efficiency of the motor are lowered. When the inclination angle α1 is large, the stator winding 90 slides down along the third upper surface portion 113, and the stator winding 90 is not wound in parallel but is wound in an intersecting manner. For this reason, the number of turns of the stator winding 90 that can be inserted into the slot 26 is reduced, and the efficiency of the electric motor is reduced.
Therefore, the inclination angle α1 of the third upper surface portion 113 with respect to the radial direction satisfies the range of (2 °) and (8 °), that is, [(2 °) ≦ α1 ≦ (8 °)]. It is preferable to set.

  Further, the third upper surface portion 113 and the inner peripheral surface 52 of the outer wall portion 50 are connected to the third upper surface portion 113 and extend from the bottom surface 40A side to the side opposite to the bottom surface 40A along the axial direction. A second upper surface portion 112 is formed. That is, the stepped second upper surface portion 112 (step surface) extending from the outer end portion 112b of the third upper surface portion 113 along the radial direction to the side opposite to the bottom surface 40A along the axial direction. Is formed. As a result, the stator winding 90 in the first row is wound in parallel (aligned) with the second upper surface portion 112 at the head without intersecting. When the first row of stator windings 90 are wound in parallel (aligned), it is possible to prevent the second and subsequent rows of stator windings 90 from being crossed and wound.

Here, the length along the axial direction of the second upper surface portion 112 (the inner end 112a of the first upper surface portion 111 along the radial direction and the axial direction of the second upper surface portion 112 along the axial direction). If the distance H1 between the bottom surface 40A and the end portion 112b on the bottom surface 40A side is short, the first row of stator windings 90 may get over the second top surface portion 112 and cannot be wound in parallel. Further, if the length H1 along the axial direction of the second upper surface portion 112 is long, the second row of stator windings 90 cannot move to the outside (outer wall portion 50 side) from the second upper surface portion 112. The number of stator windings 90 that can be inserted into the slot 26 is reduced.
Therefore, the length H1 along the axial direction of the second upper surface portion 112 is preferably (3/4 × D) and (5) when the diameter of the stator winding 90 is D (mm). / 4 × D), that is, [3/4 × D ≦ H1 ≦ 5/4 × D]. More preferably, the length H1 is set equal to the diameter D.

The length L1 along the radial direction of the first upper surface portion 111 can be wound in parallel without causing the first row of stator windings 90 to intersect with the second upper surface portion 112 at the head. The length is set to a length that can ensure the strength of the end insulating member 40.
Preferably, when the width of the outer wall portion 50 (the interval between the outer peripheral surface 51 and the inner peripheral surface 52 of the outer wall portion 50) is T (mm), the length along the radial direction of the first upper surface portion 111 The length L1 is set within the range of (T) and (2T), that is, satisfies [(T) ≦ L1 ≦ (2T)].

The first upper surface portion 111 corresponds to the “first upper surface portion” of the present invention, and the second upper surface portion 112 corresponds to the “second upper surface portion” of the present invention, and the third upper surface portion 113. Corresponds to the “third upper surface portion” of the present invention.
Further, the end portion 112a of the second upper surface portion 112 is the “end portion of the second upper surface portion opposite to the bottom surface along the axial direction” or “the first upper surface portion in the radial direction”. The end 112b of the second upper surface portion 112 corresponds to the “end of the second upper surface portion on the bottom surface side along the axial direction” or “third end” of the present invention. This corresponds to the “outer end of the upper surface portion along the radial direction”.
In addition, the length H1 along the axial direction of the second upper surface portion 112 is equal to “the inner end portion along the radial direction of the first upper surface portion and the axial direction between the second upper surface portion and the second upper surface portion. Corresponds to the “space along the axial direction between the end portion on the bottom side along the line”.

  In the end insulating member 40 of the present embodiment, the stator winding 90 can be wound in parallel (aligned) without crossing to the back of the slot 26, so that the stator winding in the slot 26 can be wound. 90 space factor can be increased.

The shape of the third upper surface portion 113 is not limited to a linear shape, and various stator windings 90 can be wound in parallel without crossing the second upper surface portion 112 from the top. It can be formed in the shape of
The 1st modification of the edge part insulation member 40 of 1st Embodiment is shown by FIG.
In the end insulating member 40 shown in FIG. 7, the third upper surface portion 113 of the upper surface 110 of the connecting portion 70 is formed in a convex shape that protrudes to the opposite side of the bottom surface 40A along the axial direction. .
Moreover, the 2nd modification of the edge part insulation member 40 of 1st Embodiment is shown by FIG.
In the end insulating member 40 shown in FIG. 8, the third upper surface portion 113 of the upper surface 110 of the connecting portion 70 is formed in a concave shape that is recessed toward the bottom surface 40A along the axial direction.
Note that the inclination angle α1 of the third upper surface portion 113 with respect to the radial direction is determined by the connection portion between the third upper surface portion 113 and the second upper surface portion 112, and the outer peripheral surface 62 of the third upper surface portion 113 and the inner wall portion 60. It is defined by a line connecting the connection part.

[Second Embodiment]
A second embodiment of the end insulating member 40 of the present invention will be described with reference to FIG. FIG. 9 shows a central cross section of the connecting portion of the end insulating member 40 of the second embodiment. The second embodiment has the first basic structure and is characterized by the shape of the upper surface 110 of the connecting portion 70.
In the end insulating member 40 of the present embodiment, the upper surface 110 of the connecting portion 70 has a first upper surface portion 111, a second upper surface portion 112, and a third upper surface portion 113 from the outer wall portion 50 side to the inner wall portion 60 side. have.
The first upper surface portion 111 extends from the inner peripheral surface 52 of the outer wall portion 50 to the inside (inner wall portion 60 side) along the radial direction, and is opposite to the bottom surface 40A from the bottom surface 40A side along the axial direction. Extends to the side. That is, the first upper surface portion 111 is formed in an inclined surface that is inclined at an angle (inclination angle) α2 with respect to the radial direction in the central cross section of the connecting portion. In the present embodiment, the first upper surface portion 111 is formed on an inclined surface extending linearly.
The second upper surface portion 112 has an end portion 112a connected to the first upper surface portion 111 and an end portion 112b connected to the third upper surface portion 113, and the axial direction (vertical direction in FIG. 9). ). In the present embodiment, the second upper surface portion 112 extends parallel to the axial direction. In the present embodiment, the second upper surface portion 112 extends linearly. The second upper surface portion 112 can also be formed so as to extend in a direction inclined with respect to the axial direction. The end portion 112 a of the second upper surface portion 112 is also an end portion of the first upper surface portion 111, and the end portion 112 b of the second upper surface portion 112 is also an end portion of the third upper surface portion 113. is there.
The third upper surface portion 113 extends from the end 112b of the second upper surface portion 112 inward (inner wall portion 60 side) along the radial direction, and on the opposite side of the bottom surface 40A along the axial direction. It is extended. That is, the third upper surface portion 113 is formed on an inclined surface inclined at an angle (inclination angle) α1 with respect to the radial direction. In the present embodiment, the third upper surface portion 113 is formed on an inclined surface extending linearly.

As described above, the inclination angle α1 of the third upper surface portion 113 with respect to the radial direction is the inclination angle α1 with respect to the radial direction and the stator winding that can be inserted into the slot 26 of the stator core 20 shown in FIG. From the graph showing the relationship between the number of turns of the wire 90 and the efficiency of the electric motor, it is preferably set within the range of (2 °) and (8 °).
In addition, the length H1 along the axial direction of the second upper surface portion 112 is preferably (3/4 × D) and (5 / 4 × D). More preferably, the length H1 is set equal to the diameter D.
As a result, as in the first embodiment, the first row of stator windings 90 can be wound in parallel without sliding while sliding along the slope of the third upper surface portion 113. In addition, the stator windings in the second row and thereafter can be wound in parallel to the back of the slot 26 without crossing each other.

In the present embodiment, the first upper surface portion 111 is formed on an inclined surface inclined at an inclination angle α2 with respect to the radial direction. That is, two inclined surfaces are provided. As a result, the first row of stator windings 90 and the second row of stator windings 90 can be wound in parallel, and the number of turns of the stator winding 90 that can be inserted into the slot 26 can be further increased. it can.
The inclination angle α2 of the first upper surface portion 111 with respect to the radial direction is preferably set within the range of (2 °) and (8 °), similarly to the inclination angle α1 of the third upper surface portion 113 with respect to the radial direction. Is done. More preferably, the inclination angle α2 is set equal to the inclination angle α1.

The shape of the third upper surface portion 113 is not limited to a linear shape, and various stator windings 90 can be wound in parallel without crossing the second upper surface portion 112 from the top. It can be formed in the shape of
In the first modification of the end insulating member 40 of the second embodiment shown in FIG. 10, the third upper surface portion 113 of the upper surface 110 of the connecting portion 70 is opposite to the bottom surface 40A along the axial direction. It is formed in a convex shape that protrudes.
Further, in the second modification of the end insulating member 40 of the second embodiment shown in FIG. 11, the third upper surface portion 113 of the upper surface 110 of the connecting portion 70 is on the bottom surface 40A side along the axial direction. It is formed in a concave shape that is recessed.
In addition, the shape of the first upper surface portion 111 is also linear, a convex shape protruding to the opposite side from the bottom surface 40A along the axial direction, and the bottom surface 40A along the axial direction, like the third upper surface portion 113. It can be formed in a shape such as a concave shape recessed to the side.

[Third Embodiment]
A third embodiment of the end insulating member 40 of the present invention will be described with reference to FIG. FIG. 12 is a diagram (a diagram viewed from a direction perpendicular to the axial direction) of the end insulating member 40 of the third embodiment viewed from the side opposite to the bottom surface 40A. The third embodiment has the first basic structure and is characterized by the shapes of the first side surface 120 and the second side surface 130 of the connecting portion 70.

The first side surface 120 of the connecting portion 70 includes a first side surface portion 121, a second side surface portion 122, and a third side surface portion 123 from the outer wall portion 50 side to the inner wall portion 60 side.
The first side surface portion 121 extends from the inner peripheral surface 52 of the outer wall portion 50 toward the inner wall portion 60 along the radial direction (vertical direction in FIG. 12). In the present embodiment, the first side surface portion 121 extends in parallel with the extending direction of the connecting portion center line K. In the present embodiment, the first side surface portion 121 extends linearly. The first side surface portion 121 can also be formed to extend in a direction inclined with respect to the extending direction of the connecting portion center line K.
The second side surface portion 122 has an end portion 122a connected to the first side surface portion 121 and an end portion 122b connected to the third side surface portion 123, and is arranged in the circumferential direction (left and right direction in FIG. 12). ). In the present embodiment, the second side surface portion 122 extends in a direction perpendicular to the extending direction of the connecting portion center line K. In the present embodiment, the second side surface portion 122 extends linearly. The end portion 122 a of the second side surface portion 122 is also the end portion of the first side surface portion 121, and the end portion 122 b of the second side surface portion 122 is also the end portion of the third side surface portion 123. is there.
The third side surface portion 123 extends from the end portion 122b of the second side surface portion 122 to the inner wall portion 60 side along the radial direction, and extends to one side (right side in FIG. 12) along the circumferential direction. Exist. That is, the third side surface portion 123 is formed on an inclined surface that is inclined at an angle (inclination angle) β1 with respect to the extending direction of the connecting portion center line K when viewed from the direction perpendicular to the axial direction. Moreover, in this embodiment, the 3rd side surface part 123 is formed in the inclined surface extended in linear form.

The second side surface 130 of the connecting portion 70 includes a fourth side surface portion 131, a fifth side surface portion 132, and a sixth side surface portion 133 from the outer wall portion 50 side to the inner wall portion 60 side.
The fourth side surface portion 131 extends from the inner peripheral surface 52 of the outer wall portion 50 toward the inner wall portion 60 along the radial direction. In the present embodiment, the fourth side surface portion 131 extends in parallel with the extending direction of the connecting portion center line K. Further, the fourth side surface portion 131 extends linearly. The fourth side surface portion 131 can also be formed to extend in a direction inclined with respect to the extending direction of the connecting portion center line K.
The fifth side surface portion 132 has an end portion 132a connected to the fourth side surface portion 131 and an end portion 132b connected to the sixth side surface portion 133, and extends along the circumferential direction. ing. In the present embodiment, the fifth side surface portion 132 extends in a direction perpendicular to the extending direction of the connecting portion center line K. Further, the fifth side surface portion 132 extends linearly. The end portion 132 a of the fifth side surface portion 132 is also the end portion of the fourth side surface portion 131, and the end portion 132 b of the fifth side surface portion 132 is also the end portion of the sixth side surface portion 133. is there.
The sixth side surface portion 133 extends from the end portion 132b of the fifth side surface portion 132 to the inner wall portion 60 side along the radial direction, and extends to the other side (left side in FIG. 12) along the circumferential direction. Exist. That is, the sixth side surface portion 133 is formed on an inclined surface that is inclined at an angle (inclination angle) β1 with respect to the extending direction of the connecting portion center line K. Further, the sixth side surface portion 133 is formed on an inclined surface extending linearly.

As a method of winding the stator winding 90 around the connecting portion 70 of the end insulating member 40 (the teeth base 23 of the stator core 20) in a state where the end insulating members 40 are disposed on both axial sides of the stator core 20, When the needle inserted into the slot 26 from the inside through the slot opening 26a is used, the movement range along the radial direction of the needle is limited, so the portion on the outer wall 50 side of the connecting portion 70 (the yoke of the teeth base 23). It is difficult to wind the stator winding 90 around the portion 21 side.
In the present embodiment, the third side surface portion 123 of the first side surface 120 of the connecting portion 70 is formed from one side to the other along the circumferential direction from the inner wall portion 60 side toward the outer wall portion 50 side along the radial direction. The sixth side surface portion 133 of the second side surface 130 is inclined along the circumferential direction from the inner wall portion 60 side toward the outer wall portion 50 side along the radial direction. It inclines so that it may extend from the other side to one side.
Thus, the stator winding 90 slides along the inclination of the third side surface portion 123 and the sixth side surface portion 133 while moving from the inner wall portion 60 side to the outer wall portion 50 side (from the tooth tip portion 24 side to the yoke 21 side). ) Are sequentially wound around.

The inclination angle β1 of the third side surface portion 123 and the sixth side surface portion 133 with respect to the extending direction of the connecting portion center line K, the number of turns of the stator winding 90 that can be inserted into the slot 26 of the stator core 20, and the electric motor 29 is a graph showing the relationship between the inclination angle α1 of the third upper surface portion 113 of the upper surface 110 of the connecting portion 70 and the slot 26 of the stator core 20 as shown in FIG. The same tendency as the graph showing the relationship between the number of turns of the stator winding 90 and the efficiency of the motor is shown.
That is, in the region where the inclination angle β1 is smaller than (2 °), the number of turns of the stator winding 90 that can be inserted into the slot 26 and the efficiency of the motor are reduced. When the inclination angle β1 is small, the stator winding 90 becomes difficult to slide along the third side surface portion 123 and the sixth side surface portion 133, and the stator winding 90 is not wound in parallel but is wound in an intersecting manner. . For this reason, the number of turns of the stator winding 90 that can be inserted into the slot 26 is reduced, and the efficiency of the electric motor is reduced.
In the region where the inclination angle β1 is larger than (8 °), the number of turns of the stator winding 90 that can be inserted into the slot 26 and the efficiency of the motor are reduced. When the inclination angle β1 is large, the stator winding 90 slides along the third side surface portion 123 and the sixth side surface portion 133, so that the stator winding 90 is not wound in parallel but wound in a crossing manner. It is done. For this reason, the number of turns of the stator winding 90 that can be inserted into the slot 26 is reduced, and the efficiency of the electric motor is reduced.
Therefore, the inclination angle β1 of the third side surface portion 123 and the sixth side surface portion 133 with respect to the extending direction of the connecting portion center line K is preferably within the range of (2 °) and (8 °), that is, It is set so as to satisfy [(2 °) ≦ β1 ≦ (8 °)].

In addition, the second side surface is connected to the third side surface portion 123 between the third side surface portion 123 and the inner peripheral surface 52 of the outer wall portion 50 and extends from the other side to the one side along the circumferential direction. The side surface portion 122 is formed, and is connected to the sixth side surface portion 133 between the sixth side surface portion 133 and the inner peripheral surface 52 of the outer wall portion 50, and from the one side to the other along the circumferential direction. A fifth side surface portion 132 extending to the side is formed. That is, a step-shaped second side surface portion 122 (step surface) extending from the outer end portion 122b of the third side surface portion 123 along the radial direction to one side along the circumferential direction is formed. And a step-like fifth side surface portion 132 (step surface) extending from the outer end portion 132b along the radial direction to the other side along the circumferential direction of the sixth side surface portion 133. ing.
Thereby, the stator winding 90 in the first row is wound in parallel (aligned) with the second side surface portion 122 and the fifth side surface portion 132 at the head, without intersecting. When the first row of stator windings 90 are wound in parallel (aligned), it is possible to prevent the second and subsequent rows of stator windings 90 from being crossed and wound.

Here, the length of the second side surface portion 122 along the direction perpendicular to the extending direction of the connecting portion center line K (the inner end portion 122a of the first side surface portion 121 along the radial direction, and Between the second side surface portion 122 and the other end portion 122b along the circumferential direction in the direction perpendicular to the extending direction of the connecting portion center line K) and the fifth side surface portion 132, The length along the direction perpendicular to the extending direction of the connecting portion center line K (in the circumferential direction of the inner end portion 132a along the radial direction of the fourth side surface portion 131 and the fifth side surface portion 132) When the length W1 in the direction perpendicular to the extending direction of the connecting portion center line K between the end portion 132b on the one side along (W1) is short, the first row of stator windings 90 is the second side surface portion. There is a risk that it will not be possible to get over 122 and the fifth side surface portion 132 and wind them in parallel. Here, by winding the first row of stator windings 90 in parallel, it is possible to effectively prevent the stator windings 90 from being crossed and wound. Further, if the length W1 of the second side surface portion 122 and the fifth side surface portion 132 along the direction perpendicular to the extending direction of the connecting portion center line K is long, the second row of stator windings 90 is formed. The second side surface portion 122 and the fifth side surface portion 132 cannot move to the outside (outer wall portion 50 side), and the number of turns of the stator winding 90 that can be inserted into the slot 26 is reduced.
Therefore, the length W1 of the second side surface portion 123 and the fifth side surface portion 132 along the direction perpendicular to the extending direction of the connecting portion center line K is preferably the diameter of the stator winding 90. Is set to D (mm) so that it satisfies the range of (3/4 × D) and (5/4 × D), ie, [3/4 × D ≦ W1 ≦ 5/4 × D]. Is set. More preferably, the length W1 is set equal to the diameter D.

The length L1 of the first side surface portion 121 and the fourth side surface portion 131 along the extending direction of the connecting portion center line K is the same as that of the first side stator winding 90, the second side surface portion 122, and The length is set to a length that allows the fifth side surface portion 132 to be wound in parallel without intersecting with the first side surface portion 132 and to ensure the strength of the end insulating member 40.
Preferably, when the width of the outer wall portion 50 is T (mm), the length L1 of the first side surface portion 121 and the fourth side surface portion 131 along the extending direction of the connecting portion center line K is: It is set to satisfy the range of (T) and (2T), that is, [(T) ≦ L1 ≦ (2T)].

  The first side surface portion 121 corresponds to the “first side surface portion” of the present invention, the second side surface portion 122 corresponds to the “second side surface portion” of the present invention, and the third side surface portion 123. Corresponds to the “third side surface portion” of the present invention. Further, the fourth side surface portion 131 corresponds to the “fourth side surface portion” of the present invention, the fifth side surface portion 132 corresponds to the “fifth side surface portion” of the present invention, and the sixth side surface. The portion 133 corresponds to the “sixth side surface portion” of the present invention. In addition, the length W1 of the second side surface portion 122 along the direction perpendicular to the extending direction of the connecting portion center line K is the “inner end along the radial direction of the first side surface portion of the present invention. And a distance along the direction perpendicular to the extending direction of the connecting portion center line between the first side portion and the other side end portion of the second side surface portion along the circumferential direction ”, the fifth side surface The length W1 of the portion 132 along the direction perpendicular to the extending direction of the connecting portion center line K is equal to “the fourth side surface portion of the present invention, the inner end portion along the radial direction, This corresponds to the “interval along the direction perpendicular to the extending direction of the connecting portion center line” between the side portion and one end portion along the circumferential direction.

  In the end insulating member 40 of the present embodiment, the stator winding 90 can be wound in parallel (aligned) without crossing to the back of the slot 26, so that the stator winding in the slot 26 can be wound. 90 space factor can be increased.

The shape of the third side surface portion 123 and the sixth surface measurement portion 133 is not limited to a linear shape, and the first row of the stator winding 90, the second side surface portion 122, and the fifth side surface portion 132 are included. It can be formed into various shapes that can be wound in parallel without crossing the top.
The 1st modification of the edge part insulation member 40 of 3rd Embodiment is shown by FIG.
In the end insulating member 40 shown in FIG. 13, the third side surface portion 123 of the first side surface 120 of the connecting portion 70 is on one side (opposite to the connecting portion center line K) along the circumferential direction. The sixth side surface portion 133 of the second side surface 130 is formed in a protruding shape that protrudes to the other side (the side opposite to the connecting portion center line K) along the circumferential direction. Yes.
Moreover, the 2nd modification of the edge part insulation member 40 of 3rd Embodiment is shown by FIG.
In the end insulating member 40 shown in FIG. 14, the third side surface portion 123 of the first side surface 120 of the connecting portion 70 is recessed toward the other side (the connecting portion center line K side) along the circumferential direction. The sixth side surface portion 133 of the second side surface 130 is formed in a concave shape that is recessed to one side (connecting portion center line side) along the circumferential direction.
Note that the inclination angle β1 of the third side surface portion 123 with respect to the extending direction of the connecting portion center line K is such that the connection portion between the third side surface portion 123 and the second side surface portion 122, the third side surface portion 123, The inclination angle β1 of the sixth side surface portion 133 with respect to the extending direction of the connecting portion center line K is defined by a line connecting the connection portion with the outer peripheral surface 62 of the inner wall portion 60, and the sixth side surface portion 133 and the fifth side surface It is defined by a line connecting a connection portion between the side surface portion 132 and a connection portion between the sixth side surface portion 133 and the outer peripheral surface 62 of the inner wall portion 60.

[Fourth Embodiment]
A fourth embodiment of the end insulating member 40 of the present invention will be described with reference to FIG. The fourth embodiment has the first basic structure and is characterized by the shapes of the first side surface 120 and the second side surface 130 of the connecting portion 70.
In the end insulating member 40 of the present embodiment, the third side surface portion 123 of the first side surface 120 of the connecting portion 70 is an inclined surface inclined at an inclination angle β1 with respect to the extending direction of the connecting portion center line K. In addition to being formed, the first side surface portion 121 is also formed as an inclined surface inclined at an inclination angle β2 with respect to the extending direction of the connecting portion center line K. Further, the sixth side surface portion 133 of the second side surface 130 is formed as an inclined surface inclined at an inclination angle β1 with respect to the extending direction of the connecting portion center line K, and the fourth side surface portion 131 is also formed. Further, it is formed on an inclined surface inclined at an inclination angle β2 with respect to the extending direction of the connecting portion center line K. In this embodiment, the 1st side surface part 121, the 3rd side surface part 123, the 4th side surface part 131, and the 6th side surface part 133 are formed in the inclined surface extended linearly.
The first side surface portion 121 is inclined so as to extend from the outer side (outer wall portion 50 side) to the inner side (inner wall portion 60 side) along the radial direction from the other side to the one side along the circumferential direction. The fourth side surface portion 131 is inclined so as to extend from one side to the other side along the circumferential direction from the outer side (outer wall portion 50 side) to the inner side (inner wall portion 60 side) along the radial direction. doing. That is, it inclines so that it may extend toward the connection part centerline K side from the opposite side to the connection part centerline K along the circumferential direction toward the outside from the inner side along the radial direction.
The inclination angle β2 of the first side surface portion 121 and the fourth side surface portion 131 with respect to the extending direction of the connecting portion center line K is preferably (2 °) and (8 °), similarly to the inclination angle β1. Set within range. More preferably, the inclination angle β2 is set equal to the inclination angle β1.

In the present embodiment, the third side surface portion 123 and the sixth side surface portion 133 are formed to be inclined at an inclination angle β1 with respect to the extending direction of the connecting portion center line K. As a result, the first row of stator windings 90 can be wound in parallel without causing crossing while sliding along the inclination of the third side surface portion 123 and the sixth side surface portion 133. In addition, the stator windings in the second row and thereafter can be wound in parallel to the back of the slot 26 without crossing each other.
Further, the first side surface portion 121 and the fourth side surface portion 131 are formed to be inclined at an inclination angle β2 with respect to the extending direction of the connecting portion center line K. Thereby, the space area of the slot 26 corresponding to the first side surface portion 121 and the fourth side surface portion 131 can be expanded, and the number of turns of the stator winding 90 that can be inserted into the slot 26 is increased. Can do.
In addition, also about the shape of the 1st side surface part 121 and the 4th side surface part 131, similarly to the 3rd upper surface part 123 and the 6th side surface part 133, it is linear form and the connection part centerline K along the circumferential direction. It can be formed in a shape such as a convex shape protruding to the opposite side, a concave shape recessed to the connecting portion center line K side along the circumferential direction.

[Fifth Embodiment]
5th Embodiment of the edge part insulation member 40 of this invention is described with reference to FIGS. FIG. 16 is a diagram (a diagram viewed from a direction perpendicular to the axial direction) of the end insulating member 40 of the fifth embodiment viewed from the side opposite to the bottom surface 40A. FIG. 17 is a cross-sectional view taken along the line XVII-XVII in FIG. 16 (a central cross section of the connecting portion). FIG. 18 is a view of the connecting portion as seen in a cross section along the circumferential direction. ) To (c) are a sectional view taken along line XVIIIa-XVIIIa, a sectional view taken along line XVIIIb-XVIIIb, and a sectional view taken along line XVIIIc-XVIIIc in FIG. The fifth embodiment has the first basic structure, and has the shape of the upper surface 110, the first side surface 120 and the second side surface 130, the first connection surface 140 and the second connection surface 150 of the connecting portion 70. Has characteristics.

As shown in FIG. 17, the upper surface 110 of the connecting portion 70 includes a first upper surface portion 111, a second upper surface portion 112, and a third upper surface portion 113 from the outer wall portion 50 side to the inner wall portion 60 side. Have.
The first upper surface portion 111 extends from the inner peripheral surface 52 of the outer wall portion 50 to the inside (inner wall portion 60 side) along the radial direction. In the present embodiment, the first upper surface portion 111 extends linearly in parallel with the radial direction (left-right direction in FIG. 17).
The second upper surface portion 112 has an end portion 112a connected to the first upper surface portion 111 and an end portion 112b connected to the third upper surface portion 113, and is axially (vertical direction in FIG. 17). ). In the present embodiment, the second upper surface portion 112 extends linearly in parallel with the axial direction.
The third upper surface portion 113 extends from the end 112b of the second upper surface portion 112 along the radial direction. In the present embodiment, the third upper surface portion 113 extends linearly in parallel with the radial direction.

As shown in FIG. 16, the first side surface 120 of the connecting portion 70 includes a first side surface portion 121, a second side surface portion 122, and a third side surface from the outer wall portion 50 side to the inner wall portion 60 side. It has a portion 123.
The first side surface portion 121 extends from the inner peripheral surface 52 of the outer wall portion 50 toward the inner wall portion 60 along the radial direction (vertical direction in FIG. 16). In the present embodiment, the first side surface portion 121 extends linearly in parallel with the connecting portion center line K.
The second side surface portion 122 has an end portion 122a connected to the first side surface portion 121 and an end portion 122b connected to the third side surface portion 123, and is arranged in the circumferential direction (left and right direction in FIG. 16). ). In the present embodiment, the second side surface portion 122 extends linearly in a direction perpendicular to the extending direction of the connecting portion center line K.
The third side surface portion 123 extends from the end portion 122b of the second side surface portion 122 along the radial direction. In the present embodiment, the third side surface portion 123 extends linearly in parallel with the extending direction of the connecting portion center line K.
Further, as shown in FIG. 16, the second side surface 130 of the connecting portion 70 includes a fourth side surface portion 131, a fifth side surface portion 132, and a sixth side surface from the outer wall portion 50 side to the inner wall portion 60 side. Side surface portion 133.
The fourth side surface portion 131 extends from the inner peripheral surface 52 of the outer wall portion 50 toward the inner wall portion 60 along the radial direction. In the present embodiment, the fourth side surface portion 131 extends linearly in parallel with the extending direction of the connecting portion center line K.
The fifth side surface portion 132 has an end portion 132a connected to the fourth side surface portion 131 and an end portion 132b connected to the sixth side surface portion 133, and extends along the circumferential direction. ing. In the present embodiment, the fifth side surface portion 132 extends linearly in a direction perpendicular to the extending direction of the connecting portion center line K.
The sixth side surface portion 133 extends from the end portion 132b of the fifth side surface portion 132 toward the inner wall portion 60 side along the radial direction. In the present embodiment, the sixth side surface portion 133 extends linearly in parallel with the extending direction of the connecting portion center line K.

Further, the first connection surface 140 and the second connection surface 150 of the connecting portion 70 are formed as shown in FIG.
The first connection surface 140 includes a first connection surface portion 141, a second connection surface portion 142, and a third connection surface portion 143 from the outer wall portion 50 side to the inner wall portion 60 side. The first connection surface portion 141 extends along the radial direction when viewed from a direction perpendicular to the axial direction (FIG. 16), and is formed between the first upper surface portion 111 and the first side surface portion 121. Has been. The third connection surface portion 143 extends along the radial direction when viewed from a direction perpendicular to the axial direction (FIG. 16), and is formed between the third upper surface portion 113 and the third side surface portion 123. Has been. In the present embodiment, the first connection surface portion 141 and the third connection surface portion 143 extend in parallel to the extending direction of the connecting portion center line K. The second connection surface portion 142 extends in the axial direction when viewed in the central cross section of the connecting portion (FIG. 17), and connects the first connection surface portion 141 and the third connection surface portion 143. . In the present embodiment, the second connection surface portion 142 extends linearly in parallel with the axial direction.
The second connection surface 150 includes a fourth connection surface portion 151, a fifth connection surface portion 152, and a sixth connection surface portion 153 from the outer wall portion 50 side to the inner wall portion 60 side. The fourth connection surface portion 151 extends along the radial direction when viewed from the direction perpendicular to the axial direction (FIG. 16), and is formed between the first upper surface portion 111 and the fourth side surface portion 131. Has been. The sixth connection surface portion 153 extends along the radial direction when viewed from the direction perpendicular to the axial direction (FIG. 16), and is formed between the third upper surface portion 113 and the sixth side surface portion 133. Has been. In the present embodiment, the fourth connection surface portion 151 and the sixth connection surface portion 153 extend in parallel to the extending direction of the connecting portion center line K. The fifth connection surface portion 152 extends in the axial direction when viewed in the central cross section of the connecting portion (FIG. 17), and connects the fourth connection surface portion 151 and the sixth connection surface portion 153. . In the present embodiment, the fifth connection surface portion 152 extends linearly in parallel with the axial direction.
In the present embodiment, the first connection surface portion 141, the third connection surface portion 143, the fourth connection surface portion 151, and the sixth connection surface portion 153 are viewed in a cross section along the circumferential direction (FIG. 18). ), And an arc surface (R surface) (including “substantially arc surface”). As a result, damage to the stator winding 90 when winding the stator winding 90 and damage to the stator winding 90 due to sliding of the stator winding 90 can be prevented.

In the present embodiment, the third connection surface portion 143 that connects the third upper surface portion 113 and the third side surface portion 123 and the sixth connection surface that connects the third upper surface portion 113 and the sixth side surface portion 133. The radius r of the arc surface of the connecting surface portion 153 is configured such that the radius on the outer wall 50 side is larger than the radius on the inner wall 60 side.
That is, the radius of the third connection surface portion 143 (a) and the sixth connection surface portion 153 (a) at the position (a) on the inner wall portion 60 side is r1. The radius of the third connection surface portion 143 (c) and the sixth connection surface portion 153 (c) at the position (c) on the outer wall (50) side is r3 (r1 <r3). The third connection surface portion 143 (b) and the sixth connection surface portion at a position (b) between the position (a) on the inner wall (60) side and the position (c) on the outer wall (50) side. The radius of 153 (c) is r2 (r1 <r2 <r3).
In the present embodiment, the radius r of the arc surfaces of the third connection surface portion 143 and the sixth connection surface portion 153 is configured to continuously change from the inner wall portion 60 side toward the outer wall portion 50 side. Yes. Note that the radius r of the circular arc surface may be configured to gradually change from the inner wall portion 60 side to the outer wall portion 50 side.

In the present embodiment, the third connection surface portion 143 of the first connection surface 140 of the connecting portion 70 and the sixth connection surface portion 153 of the second connection surface 150 are formed in an arc surface, and the outer wall The radius of the arc surface on the side of the portion 50 is set to be larger than the radius of the arc surface on the side of the inner wall portion 60.
Thereby, the stator winding 90 in the first row is wound from the inner wall portion 60 side to the outer wall portion 50 side while sliding along the third connection surface portion 143 and the sixth connection surface portion 153. The third upper surface portion 113, the third side surface portion 123, the sixth side surface portion 133, the third connection surface portion 143, and the sixth connection surface portion 153 are connected to the sixth connection surface portion 153 and formed in steps. The upper surface portion 112, the second side surface portion 122, the fifth side surface portion 132, the second connection surface portion 142, and the fifth connection surface portion 152 are wound in parallel without crossing each other.

An interval (interval along the axial direction) S2 between the first upper surface portion 111 and the third upper surface portion 113 on the second upper surface portion 112, and the first side surface portion 121 on the second side surface portion 122. Between the first side surface portion 123 and the third side surface portion 123 (interval along the circumferential direction) S1 and the distance between the fourth side surface portion 131 and the sixth side surface portion 133 on the fifth side surface portion 132 (circumference). (Spacing along the direction) S1 is preferably within the range of (3/4 × D) and (5/4 × D) when the diameter of the stator winding 90 is D (mm), that is, It is set to satisfy [3/4 × D ≦ S1, S2 ≦ 5/4 × D]. More preferably, the interval (interval along the normal direction) S3 between the first connection surface portion 141 and the third connection surface portion 143 on the second connection surface portion 142 is also (3/4). × D) and (5/4 × D).
Further, on the connecting portion center line K, the distance L1 between the inner end portion 112a along the radial direction of the first upper surface portion 111 and the inner peripheral surface 52 of the outer wall portion 50, and the first A line connecting the inner end portion 122a along the radial direction of the side surface portion 121 and the inner end portion 132a along the radial direction of the fourth side surface portion 131, and the inner peripheral surface 52 of the outer wall portion 50 The interval L1 is preferably set within the range of (T) and (2T) when the width of the outer wall portion 50 is T (mm).
The step surfaces with which the leading ends of the first row of stator windings abut are the second upper surface portion 112, the second side surface portion 122, the fifth side surface portion 132, the second connection surface portion 142, and the first However, at least the second upper surface portion 112, the second side surface portion 122, and the fifth side surface portion 132 are preferably provided. Moreover, the 1st connection surface part 141, the 2nd connection surface part 142, the 4th connection surface part 151, and the 5th connection surface part 152 can also be abbreviate | omitted.

Next, a second basic structure of the end insulating member 40 will be described with reference to FIGS. FIG. 19 is a schematic view when the end insulating member 40 is viewed from the side opposite to the bottom surface 40A. FIG. 20 is a schematic view when FIG. 19 is seen in a cross section taken along line XX-XX (a central cross section of the connecting portion). FIG. 21 is a schematic view of FIG. 19 as viewed in the cross-section along the line XXI-XXI.
The end insulating member 40 shown in FIG. 19 has an outer wall portion 50, an inner wall portion 60 and a connecting portion 70, and has a peripheral edge portion 80. The peripheral edge portion 80 is provided between the connecting portion 70 and the outer wall portion 50 and extends from the connecting portion 70 to both sides in the circumferential direction. By providing the peripheral edge 80, the strength of the end insulating member 40 can be ensured.
The peripheral edge 80 has an upper surface 81 on the side opposite to the bottom surface 40A and an inner peripheral surface 82 on the inner side.
The inner peripheral surface 82 of the peripheral edge portion 80 extends in a direction perpendicular to the extending direction of the connecting portion center line K. The inner peripheral surface 82 can also be formed to extend in a direction inclined with respect to the extending direction of the connecting portion center line K. At this time, it is preferable that the connection portion center line K be formed so as to be line symmetric with respect to the extending direction.
Further, the upper surface 81 of the peripheral edge 80 is formed in a step shape with respect to the upper surface 110 of the connecting portion 70. The distance H2 along the axial direction between the upper surface 81 of the peripheral edge 80 and the upper surface 110 of the connecting portion 70 is set in consideration of the strength of the end insulating member 40 and the like.
The peripheral edge 80 corresponds to the “peripheral edge” of the present invention.

[Sixth Embodiment]
A sixth embodiment of the end insulating member 40 of the present invention is shown in FIG. FIG. 22 shows a central cross section of the connecting portion of the end insulating member 40 of the sixth embodiment. The sixth embodiment has the second basic structure and is characterized by the shape of the upper surface 110 of the connecting portion 70.
Since the end insulating member 40 of the sixth embodiment has the same configuration as the end insulating member 40 of the first embodiment except that it has a peripheral edge 80, detailed description thereof is omitted.
In the central cross section of the connecting portion, the length H1 along the axial direction of the second upper surface portion 112 is preferably set within the range of (3/4 × D) and (5/4 × D). . In addition, the inclination angle α1 of the third upper surface portion 113 with respect to the radial direction is preferably set within the range of (2 °) and (8 °). In addition, the interval L1 between the inner end portion 112a of the first upper surface portion 111 along the radial direction and the inner peripheral surface 52 of the outer wall portion 50 on the connecting portion center line K is preferably, It is set within the range of (T) and (2T). In addition, the space | interval L1 is L2 (space | interval between the internal peripheral surface 82 of the peripheral part 80 and the internal peripheral surface 52 of the outer wall part 50 on the connection part center line K), and L3 (on the connection part center line K). The distance between the inner end portion 112a of the first upper surface portion 111 along the radial direction and the inner peripheral surface 82 of the peripheral edge portion 80).
This embodiment has the same effect as the first embodiment, and can increase the strength of the end insulating member 40.
The shape of the third upper surface portion 113 can be formed in various shapes such as a straight shape, a convex shape, and a concave shape.

[Seventh Embodiment]
A seventh embodiment of the end insulating member 40 of the present invention is shown in FIG. FIG. 23 shows a central cross section of the connecting portion of the end insulating member 40 of the seventh embodiment. The seventh embodiment has the second basic structure and is characterized by the shape of the upper surface 110 of the connecting portion 70.
Since the end insulating member 40 of the seventh embodiment has the same configuration as that of the end insulating member 40 of the second embodiment except that the end insulating member 40 has a peripheral edge 80, detailed description thereof is omitted.
The length H1 along the axial direction of the second upper surface portion 112 in the central cross section of the connecting portion is preferably set within the range of (3/4 × D) and (5/4 × D). . Further, the inclination angle α1 of the third upper surface portion 113 with respect to the radial direction and the inclination angle α2 of the first upper surface portion 111 with respect to the radial direction are preferably set within the range of (2 °) and (8 °). The More preferably, the inclination angle α2 is set equal to the inclination angle α1. In addition, the interval L1 between the inner end portion 112a of the first upper surface portion 111 along the radial direction and the inner peripheral surface 52 of the outer wall portion 50 on the connecting portion center line K is preferably, It is set within the range of (T) and (2T).
This embodiment has the same effect as the second embodiment, and can increase the strength of the end insulating member 40.
The shapes of the third upper surface portion 113 and the first upper surface portion 111 can be formed in various shapes such as a linear shape, a convex shape, and a concave shape.

[Eighth Embodiment]
An eighth embodiment of the end insulating member 40 of the present invention is shown in FIG. FIG. 24 is a view of the end insulating member 40 of the eighth embodiment when viewed from a direction perpendicular to the axial direction. The eighth embodiment has the second basic structure and is characterized by the shapes of the first side surface 120 and the second side surface 130 of the connecting portion 70.
Since the end insulating member 40 of the eighth embodiment has the same configuration as that of the end insulating member 40 of the third embodiment except that the end insulating member 40 has a peripheral edge 80, detailed description thereof is omitted.
When viewed from the direction perpendicular to the axial direction, the length W1 of the second side surface portion 122 and the fifth side surface portion 132 along the direction perpendicular to the extending direction of the connecting portion center line K is preferably It is set within the range of (3/4 × D) and (5/4 × D). In addition, the inclination angle β1 of the third side surface portion 123 and the sixth side surface portion 133 with respect to the extending direction of the connecting portion center line K is preferably set within the range of (2 °) and (8 °). The In addition, the inner side end portion 112 a along the radial direction of the first side surface portion 121 and the inner side end portion 132 a along the radial direction of the fourth side surface portion 131 on the connecting portion center line K are connected. The distance L1 between the line and the inner peripheral surface 52 of the outer wall portion 50 is preferably set within the range of (T) and (2T). In addition, the space | interval L1 is L2 (space | interval between the internal peripheral surface 82 of the peripheral part 80 and the internal peripheral surface 52 of the outer wall part 50 on the connection part center line K), and L3 (on the connection part center line K). A line connecting the inner end portion 112 a along the radial direction of the first side surface portion 121 and the inner end portion 132 a along the radial direction of the fourth side surface portion 131, and the inside of the peripheral edge portion 80. The distance between the peripheral surface 82 and the peripheral surface 82).
This embodiment has the same effect as the third embodiment, and can increase the strength of the end insulating member 40.
The shape of the third side surface portion 123 and the sixth side surface portion 133 and the shape of the first side surface portion 121 and the fourth side surface portion 131 should be formed in various shapes such as a straight shape, a convex shape, and a concave shape. Can do.
Further, the first side surface portion 121 and the fourth side surface portion 131 can be inclined with respect to the extending direction of the connecting portion center line K.

Next, the 3rd basic structure of the edge part insulation member 40 is demonstrated with reference to FIG. 25, FIG. FIG. 25 is a schematic view when the end insulating member 40 is viewed from the side opposite to the bottom surface 40A. FIG. 26 is a schematic view of FIG. 25 as seen from the cross section along the line XXVI-XXVI (the central cross section of the connecting portion).
In the end insulating member 40 shown in FIG. 25, the upper surface 81 of the peripheral edge portion 80 is formed flush with the upper surface 110 of the connecting portion 70.

[Ninth Embodiment]
A ninth embodiment of the end insulating member 40 of the present invention is shown in FIG. FIG. 27 shows a central cross section of the connecting portion of the end insulating member 40 of the ninth embodiment. The ninth embodiment has a third basic structure and is characterized by the shape of the upper surface 110 of the connecting portion 70.
The end insulating member 40 of the ninth embodiment is the same as that of the sixth embodiment except that the upper surface 81 of the peripheral edge 80 is formed flush with the first upper surface portion 111 of the upper surface 110 of the connecting portion 70. The configuration is the same as that of the end insulating member 40.

[Tenth embodiment]
A tenth embodiment of the end insulating member 40 of the present invention is shown in FIG. FIG. 28 is a view of the end insulating member 40 of the tenth embodiment as viewed from the side opposite to the bottom surface 40A. The tenth embodiment has a third basic structure and is characterized by the shapes of the first side surface 120 and the second side surface 130 of the connecting portion 70.
The end insulating member 40 of the tenth embodiment is the same as that of the eighth embodiment except that the upper surface 81 of the peripheral portion 80 is formed flush with the first upper surface portion 111 of the upper surface 110 of the connecting portion 70. The configuration is the same as that of the end insulating member 40.

  As described above, by using the end insulating member of the present invention, when the stator winding is wound in a state where the end insulating members are arranged on both sides in the axial direction of the stator core, the stator winding It is possible to effectively prevent cross winding. Thereby, the space factor of the stator winding | coil in the slot of a stator core can be raised.

The present invention is not limited to the configuration described in the embodiment, and various changes, additions, and deletions are possible.
Although the end insulating members arranged on both sides in the axial direction of the stator core have been described, the present invention relates to the stator core, the end insulating members arranged on both sides in the axial direction of the stator core, and the stator windings. It is also possible to configure as a stator including the stator and as a rotating machine motor including the stator and the rotor.
Each structure demonstrated by each embodiment can also be used independently, and can also be used combining the some selected suitably. For example, a configuration “provides an inclined surface and a step surface on the upper surface 110 of the connecting portion 70”, a configuration “provides an inclined surface and a step surface on the first side surface 120 and the second side surface 130”, “first connection surface and The configuration in which the radius of the circular arc surface forming the second connection surface is set to be large from the inner wall portion side to the outer wall portion side, and a step surface is provided, and a configuration in which a plurality of inclined surfaces are provided are appropriately selected. Can be combined.

DESCRIPTION OF SYMBOLS 10 Stator 20 Stator core 20a Rotor insertion space 20A, 20B Core end surface 21 Yoke 22 Teeth 23 Teeth base 24 Teeth front end 25 Teeth front end 26 Slot 26a Slot opening 30 Slot insulating member 40 End insulating member 40A End surface 50 Outer wall portion 51 Outer peripheral surface 52 Inner peripheral surface 60 Inner wall portion 61 Inner peripheral surface 62 Outer peripheral surface 70 Connecting portion 80 Peripheral portion 81 Upper surface 82 Inner peripheral surface 110 Upper surface 111 First upper surface portion 112 Second upper surface portions 112a and 112b End portions 113 Third upper surface portion 120 First side surface 121 First side surface portion 122 Second side surface portion 122a, 122b End portion 123 Third side surface portion 130 Second side surface 131 First side surface portion 132 Second side surface Portions 132a and 132b End portion 133 Third side surface portion 140 First connection surface 141 First connection Portion 142 second connecting surface portion 143 third connecting surface portion 150 connecting surface portion of the second connection surface 151 fourth connecting surface portion 152 fifth connection surface section 153 Sixth

Claims (9)

Arranged on both sides in the axial direction of the stator core, having a bottom surface on the side facing the stator core, and an outer wall portion extending along the circumferential direction and the axial direction, and disposed on the inner side of the outer wall portion. And an end having a plurality of inner wall portions extending along the circumferential direction and the axial direction, and a plurality of connecting portions extending along the radial direction and connecting the outer wall portion and each of the plurality of inner wall portions. An insulating member,
The connecting portion is formed on the other side along the circumferential direction, a top surface formed on the opposite side of the bottom surface along the axial direction, a first side surface formed on one side along the circumferential direction, and A second side;
The upper surface extends from the outside to the inside along the radial direction when viewed in a cross section including a connecting portion center line passing through the center between the first side surface and the second side surface, and in the axial direction. A first upper surface portion extending from the bottom surface side to the opposite side of the bottom surface, and an inner end portion along the radial direction of the first upper surface portion from the inner surface portion toward the bottom surface side along the axial direction. A second upper surface portion extending from the bottom surface side end portion along the axial direction of the second upper surface portion and extending inward along the radial direction, and the bottom surface along the axial direction. And a third upper surface portion extending on the opposite side,
A distance along the axial direction between the inner end portion along the radial direction of the first upper surface portion and the end portion on the bottom surface side along the axial direction of the second upper surface portion. Is characterized in that it is set within the range of (3/4 × D) and (5/4 × D) where D (mm) is the diameter of the stator winding wound around the stator core. End insulating member. The end insulating member according to claim 1,
In the cross section including the connecting portion center line, the angle between the radial direction and the first upper surface portion and the angle between the radial direction and the third upper surface portion are (2 °) and (8 °). An end insulating member characterized in that it is set within the range. The end insulating member according to claim 1 or 2,
In the cross section including the connecting portion center line, the distance between the inner end of the first upper surface portion along the radial direction and the inner peripheral surface of the outer wall portion is the width of the outer wall portion. When T (mm) is set, the end insulating member is set within the range of (T) and (2T). The end insulating member according to any one of claims 1 to 3,
The first side surface includes a first side surface portion extending along the radial direction when viewed from a direction perpendicular to the axial direction, and an inner end portion along the radial direction of the first side surface portion. The second side surface portion extending to the other side along the circumferential direction and the other side end portion of the second side surface portion along the circumferential direction extending inward along the radial direction. A third side surface portion extending to one side along the circumferential direction,
The second side surface includes a fourth side surface portion extending along the radial direction when viewed from a direction perpendicular to the axial direction, and an inner end portion along the radial direction of the fourth side surface portion. A fifth side surface portion extending to one side along the circumferential direction, and an end portion on one side along the circumferential direction of the fifth side surface portion extending inward along the radial direction. A sixth side surface portion extending to the other side along the circumferential direction,
The connection portion center line between the inner end portion along the radial direction of the first side surface portion and the other end portion of the second side surface portion along the circumferential direction. An interval along a direction perpendicular to the extending direction, an inner end portion of the fourth side surface portion along the radial direction, and one side of the fifth side surface portion along the circumferential direction. The distance along the direction perpendicular to the extending direction of the connecting portion center line is set within the range of (3/4 × D) and (5/4 × D). An end insulating member characterized by that. The end insulating member according to claim 4,
When viewed from a direction perpendicular to the axial direction, the inner side end portion of the first side surface portion along the radial direction and the fourth side surface portion of the first side surface portion along the radial direction on the connecting portion center line. The distance between the line connecting the inner end portion and the inner peripheral surface of the outer wall portion is within the range of (T) and (2T) when the width of the outer wall portion is T (mm). An end insulating member characterized by being set. The end insulating member according to claim 4 or 5,
The angle between the connecting portion center line and the third side surface portion and the angle between the connecting portion center line and the sixth side surface portion are within the range of (2 °) and (8 °). An end insulating member characterized by being set. The end insulating member according to any one of claims 1 to 6,
A peripheral portion between the connecting portion and the outer wall portion;
The edge insulating member, wherein the peripheral edge portion extends to both sides in the circumferential direction from the connecting portion.   A stator comprising a stator core, end insulating members arranged on both sides in the axial direction of the stator core, and stator windings, wherein the end insulating member of claim 1-7. An end insulating member according to any one of the above is used.   A rotating machine comprising: the stator according to claim 8; and a rotor arranged to be rotatable relative to the stator.

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