JP6853703B2 - End insulation and rotating machine - Google Patents

Description

The present invention relates to end insulating members arranged on both sides of the stator core in the axial direction.

As a drive motor for driving equipment (for example, an air conditioner drive motor, a vehicle drive motor, an in-vehicle equipment drive motor), a centralized winding motor in which a stator winding is wound around a stator core tooth in a centralized winding method is used. There is. In a centralized winding motor, a stator winding is wound with end insulating members (called "resin bobbins") arranged on both sides of the stator core in the axial direction.
In the centralized winding motor, a stator winding (for example, a crossover wire or a lead wire of each phase) is arranged on the outer peripheral side of the end insulating member. If the stator windings located on the outer peripheral side of the end insulating member move along the axial direction, the stator windings may come into contact with other parts (for example, crossover wires or lead wires of other phases). is there. For this reason, the outer peripheral surface of the end insulating member is provided with a protrusion that regulates the movement of the stator windings arranged on the outer peripheral side of the end insulating member along the axial direction. An electric motor provided with a protrusion on the outer peripheral surface of the end insulating member is disclosed in, for example, Patent Document 1 (Japanese Unexamined Patent Publication No. 2008-148526).

Japanese Unexamined Patent Publication No. 2008-148526

In the electric motor disclosed in Patent Document 1, the movement of the stator winding along the axial direction can be restricted by the protrusions provided on the outer peripheral surface of the end insulating member, but the stator winding Cannot be regulated (inflated) to move outward along the radial direction. If the stator winding moves (bulges) toward the outer circumference along the radial direction, the stator winding may come into contact with other parts arranged on the outer circumference of the end insulating member.
The present invention was devised in view of such a point, and it is possible to regulate the movement (bulging) of the stator windings arranged on the outer peripheral side of the end insulating member to the outer peripheral side in the radial direction. The purpose is to provide the technology that can be used.

The first invention relates to an end insulating member. The end insulating member of the present invention is arranged on at least one of both sides in the axial direction of the stator core, and is preferably formed of a resin having insulating properties.
The end insulating member of the present invention has an outer wall portion, a plurality of inner wall portions, and a plurality of connecting portions. The outer wall portion extends along the circumferential direction and the axial direction, the inner peripheral surface of the outer wall portion is on the inner peripheral side in the radial direction, the outer peripheral surface of the outer wall portion is on the outer peripheral side in the radial direction, and the first is on the stator core side along the axial direction. The insulating member end face has a second insulating member end face on the side opposite to the stator core along the axial direction. The inner wall portion is arranged on the inner peripheral side in the radial direction from the outer wall portion, and extends along the circumferential direction and the axial direction. The connecting portion extends along the radial direction and connects the outer wall portion and the inner wall portion.
The outer wall portion has a second insulating member end face, an outer peripheral surface of the outer wall portion, and a notch portion that opens to the inner peripheral surface of the outer wall portion on the opposite side of the stator core, and the outer peripheral surface in the radial direction from the outer peripheral surface of the outer wall portion. At least one first protrusion protruding to the side and at least one second protrusion protruding from the outer peripheral surface of the outer wall portion to the outer peripheral side in the radial direction from the at least one first protrusion toward the stator core. Has a part.
The first protrusion is a first outer wall surface on the stator core side along the axial direction, a second outer wall surface on the side opposite to the stator core along the axial direction, and a first outer wall surface on the radial outer peripheral side. It has a third outer wall surface that connects the outer wall surface and the second outer wall surface.
Then, the circumferential center of the first protrusion including the circumferential center line passing through the circumferential center of the first outer wall surface of the first protrusion and the circumferential center line passing through the circumferential center of the second outer wall surface. When viewed in cross section, the length R along the radial direction of the first outer wall surface is within the range of the diameters D (mm) and 8D (mm) of the stator winding ([D ≦ R ≦ 8D]), and The angle θ1 formed by the first outer wall surface and the outer peripheral surface of the outer wall portion is within the range of 60 (degrees) and 80 (degrees) ([60 (degrees) ≤ θ1 ≤ 80 (degrees)]. To satisfy).
In the present invention, the first outer wall surface of the first protrusion on the stator core side is radially from the end portion on the inner peripheral side in the radial direction (the connection portion between the first outer wall surface and the outer peripheral surface of the outer wall portion). It is formed so as to be inclined so that the distance from the end surface of the first insulating member on the stator core side is shortened toward the end portion on the outer peripheral side (the connection portion between the first outer wall surface and the third outer wall surface). ing. As a result, the stator windings that are routed from the radial inner peripheral side of the outer wall portion to the radial outer peripheral side via the notch and are arranged on the stator core side from the first protrusion are axially It is possible to regulate the movement to the stator core side along the same, and to regulate the movement (bulging) to the outer peripheral side in the radial direction.
If the angle θ1 is smaller than 60 degrees, the strength of the first protrusion decreases. By setting the angle θ1 to 80 (degrees) or less, the movement of the stator winding toward the outer peripheral side in the radial direction can be effectively regulated by the first outer wall surface of the first protrusion.
The second protrusion has a fourth outer wall surface on the stator core side along the axial direction, a fifth outer wall surface on the side opposite to the stator core along the axial direction, and a fourth outer wall surface on the radial outer peripheral side. It has a sixth outer wall surface that connects the outer wall surface and the fifth outer wall surface.
The first protrusion and the second protrusion are preferably arranged alternately along the circumferential direction (one protrusion is between two adjacent protrusions in the circumferential direction).
Then, the circumferential center of the second protrusion including the circumferential center line passing through the circumferential center of the fourth outer wall surface of the second protrusion and the circumferential center line passing through the circumferential center of the fifth outer wall surface. When viewed in cross section, the length S along the radial direction of the fourth outer wall surface is within the range of the diameters D (mm) and 8D (mm) of the stator winding ([D ≦ S ≦ 8D]), and The angle θ2 formed by the fourth outer wall surface and the outer peripheral surface of the outer wall portion is within the range of 60 (degrees) and 80 (degrees) ([60 (degrees) ≤ θ2 ≤ 80 (degrees)]). It is composed of.
In the present invention, the fourth outer wall surface of the second protrusion on the stator core side is radially from the end portion on the inner peripheral side in the radial direction (the connection portion between the fourth outer wall surface and the outer peripheral surface of the outer wall portion). It is formed so as to be inclined so that the distance from the end surface of the first insulating member on the stator core side is shortened toward the end portion on the outer peripheral side (the connection portion between the fourth outer wall surface and the sixth outer wall surface). ing. As a result, the stator windings that are routed from the radial inner peripheral side of the outer wall portion to the radial outer peripheral side via the notch and are arranged on the stator core side from the second protrusion are axially It is possible to regulate the movement to the opposite side of the stator core along the same, and to regulate the movement (bulging) to the outer peripheral side in the radial direction.
If the angle θ2 is smaller than 60 (degrees), the strength of the second protrusion decreases. By setting the angle θ2 to 80 (degrees) or less, the movement of the stator winding toward the outer peripheral side in the radial direction can be effectively regulated by the fourth outer wall surface of the second protrusion.
Further, when viewed from the circumferential central cross section of the second protrusion, the length T along the radial direction of the fifth outer wall surface is within the range of the diameters D (mm) and 8D (mm) of the stator winding. ([D ≦ T ≦ 8D]), and the angle θ3 formed by the fifth outer wall surface and the outer peripheral surface of the outer wall portion is within the range of 60 (degrees) and 80 (degrees) ([60 (degrees) ≦). θ3 ≦ 80 (degrees)]).
In the present invention, the fifth outer wall surface of the second protrusion, which is opposite to the stator core, is from the end portion on the inner peripheral side in the radial direction (the connection portion between the fifth outer wall surface and the outer peripheral surface of the outer wall portion). Inclined toward the end on the outer peripheral side in the radial direction (the connection between the fifth outer wall surface and the sixth outer wall surface) so that the distance from the end face of the first insulating member on the stator core side becomes longer. It is formed. As a result, the outer wall portion is routed from the radial inner peripheral side to the radial outer peripheral side via the notch portion, and the first protrusion is opposite to the stator core from the second protrusion along the axial direction. It is possible to restrict the stator windings arranged on the stator core side from the portion from moving toward the stator core side from the second protrusion, and also to prevent the stator winding from moving (bulging) to the outer peripheral side in the radial direction. Can be regulated. If the angle θ3 is smaller than 60 (degrees), the strength of the second protrusion decreases. By setting the angle θ3 to 80 (degrees) or less, the movement of the stator winding toward the outer peripheral side in the radial direction can be effectively regulated by the fifth outer wall surface of the second protrusion.
In the present invention, while ensuring the strength of the first protrusion and the second protrusion, the outer wall portion is routed from the radial inner peripheral side to the radial outer peripheral side through the notch portion, and the first protrusion is provided. The stator windings arranged on the stator core side from the portion move from the first protrusion to the side opposite to the stator core along the axial direction, move to the outer peripheral side in the radial direction, and the second protrusion. The stator windings arranged on the stator core side from the first protrusion on the side opposite to the stator core move from the second protrusion to the stator core side along the axial direction and the outer circumference in the radial direction. Movement to the side, movement of the stator windings arranged on the stator core side from the second protrusion along the axial direction from the second protrusion to the side opposite to the stator core, and the radial outer peripheral side. Movement to can be regulated.
In another aspect of the first invention, the second outer wall surface of the first protrusion is formed flush with the end face of the second insulating member.
In this embodiment, the length of the outer wall portion along the axial direction, that is, the length of the end insulating member along the axial direction can be shortened.
The second invention relates to a rotating machine. The rotor of the present invention includes a stator and a rotor, and the stator has a stator core, end insulating members arranged on both axial sides of the stator core, and a stator winding. .. Then, in the present invention, any of the above-mentioned end insulating members is used as the end insulating member. The present invention is preferably configured as an electric motor.
The present invention has the same effect as the above-mentioned end insulating member.

In the end insulating member and the rotating machine of the present invention, it is possible to restrict the stator windings arranged on the outer peripheral side of the end insulating member from moving (bulging) to the outer peripheral side in the radial direction.

It is a figure which shows one Embodiment of the electric motor of this invention. FIG. 1 is a cross-sectional view taken from line II-II. It is a figure which shows one Embodiment of the end insulation member of this invention. FIG. 3 is a view seen from the direction of arrow IV. It is an enlarged view of the part indicated by the arrow V of FIG. FIG. 5 is a cross-sectional view taken along the line VI-VI of the arrow. It is a figure which shows the modification of the 1st protrusion. It is an enlarged view of the part indicated by the arrow VIII of FIG. FIG. 8 is a cross-sectional view taken along the line IX-IX. It is a figure which shows the modification of the 2nd protrusion.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the present specification, the description "axial direction" refers to a rotation center line passing through the rotation center O (see FIG. 2) of the rotor in a state where the rotor is arranged so as to be rotatable relative to the stator. The direction of P (see FIG. 1) is shown. The description "circumferential direction" is centered on the center of rotation O when viewed in a cross section perpendicular to the axial direction (see FIG. 2) in a state where the rotor is arranged so as to be rotatable relative to the stator. Indicates the circumferential direction. The description "radial direction" indicates a direction passing through the center of rotation O when viewed in a cross section perpendicular to the axial direction in a state where the rotor is arranged so as to be rotatable relative to the stator. The description "diameter inner circumference side" indicates the rotation center O side along the radial direction, and the description "diameter outer circumference side" indicates the side opposite to the rotation center O along the radial direction.
Regarding the end insulating member, the descriptions "axial direction", "circumferential direction", and "diameter direction" mean that the end insulating member is arranged at a position facing the core end face of the stator core. "Axial direction", "circumferential direction" and "diameter direction" are shown.

An embodiment 100 of the rotary machine of the present invention configured as an electric motor will be described with reference to FIGS. 1 and 2. Note that FIG. 1 is a diagram showing a schematic configuration of the electric motor 110 of the present embodiment. Further, FIG. 2 is a cross-sectional view (cross-sectional view perpendicular to the axial direction) of FIG. 1 as viewed from the direction of line II-II.
The electric motor 100 of the present embodiment includes a stator 200 and a rotor 400 that is rotatably supported relative to the stator 200.

The rotor 400 is composed of a rotor core 410 and a rotating shaft 420. The rotor core 410 is formed of a laminated body in which a plurality of electromagnetic steel sheets are laminated. As the rotor 400, a rotor having a structure corresponding to the type of electric motor (for example, a permanent magnet electric motor, an induction motor) is used.

The stator 200 is composed of a stator core 210, an end insulating member 300, and a stator winding 230.
The stator core 210 is formed of a laminated body in which a plurality of electromagnetic steel sheets are laminated, and has core end faces 210A and 210B on both sides in the axial direction. The stator core 210 extends from the yoke 211 along the circumferential direction and the rotation center O side (diameter inner peripheral side) along the radial direction when viewed in a cross section perpendicular to the axial direction. Has a plurality of teeth 212. The teeth 212 are provided on the radial inner peripheral side of the teeth base 213 and the teeth base 213 extending radially from the yoke 211, and the teeth tip extending along the circumferential direction. It has 214. The rotor accommodation space 210a in which the rotor 400 is accommodated is formed by the teeth tip surface 215 on the radial inner peripheral side of the teeth tip portion 214. The stator winding 230 is inserted into the slot 216 formed by the teeth 212 adjacent in the circumferential direction via the slot insulating member 220.

The end insulating member 300 is arranged on both sides of the stator core 210 in the axial direction (positions facing the core end faces 210A and 210B).
The end insulating member 300 of the present embodiment will be described with reference to FIGS. 3 and 4. Note that FIG. 3 is a perspective view of the end insulating member 300. Further, FIG. 4 is a view of FIG. 3 as viewed from the direction indicated by the arrow IV.
The end insulating member 300 has an outer wall portion 310, a plurality of inner wall portions 320, and a plurality of connecting portions 330.
The outer wall portion 310 extends along the circumferential direction and the axial direction, and has an outer wall portion outer peripheral surface 311 on the radial outer peripheral side and an outer wall portion inner peripheral surface 312 on the radial inner peripheral side. The inner wall portion 320 is arranged on the inner peripheral side in the radial direction with respect to the outer wall portion 310, and extends along the circumferential direction and the axial direction. The connecting portion 330 extends along the radial direction and connects the outer wall portion 310 and the inner wall portion 320.
The outer wall portion 310, the connecting portion 330, and the inner wall portion 320 of the end insulating member 300 are arranged at positions facing the yoke 211, the tooth base portion 213, and the tooth tip portion 214 of the stator core 210, respectively.
The rotor insertion space 300a into which the rotor 400 is inserted is formed by the tip surface 320a of the inner wall portion on the radial inner peripheral side of the inner wall portion 320.
The end insulating member 300 has a first insulating member end face 300A on the stator core 210 side along the axial direction. The first insulating member end face 300A is arranged at a position facing the core end face 210A or 210B of the stator core 210. Further, the outer wall portion 310 has a second insulating member end face 310A on the side opposite to the stator core 210 along the axial direction.
The first insulating member end face 300A corresponds to the "first insulating member end face" of the present invention, and the second insulating member end face 310A corresponds to the "second insulating member end face" of the present invention.

The end insulating member 300 has a positioning protrusion 360 projecting from the first insulating member end face 300A toward the stator core 210 in the axial direction, and the stator core 210 is formed on the core end faces 210A and 210B. It has a positioning recess (not shown). By fitting the positioning protrusion 360 of the end insulating member 300 into the positioning recess of the stator core 210, the end insulating member 300 can be positioned with respect to the stator core 210.
The stator winding 230 has recesses formed by the outer wall portion 310, the inner wall portion 320, and the connecting portion 330 of the end insulating member 300 in a state where the end insulating members 300 are arranged on both sides in the axial direction of the stator core 210. Wrapped around.

The outer wall portion 310 has a notch portion 313 that opens to the second insulating member end surface 310A, the outer wall portion outer peripheral surface 311 and the outer wall portion inner peripheral surface 312 on the side opposite to the stator core 210. The stator winding 230 (for example, the crossover wire or lead wire of each phase) is formed from the radial inner peripheral side to the radial outer peripheral side or from the radial outer peripheral side to the inner diameter of the outer wall portion 310 via the notch 313. It is handed over to the circumference side.
Further, the outer wall portion 310 has a first protruding portion 340 and a second protruding portion 350 projecting from the outer peripheral surface 311 of the outer wall portion to the outer peripheral side in the radial direction.

The first protrusion 340 will be described with reference to FIGS. 5 and 6. 5 is an enlarged view of the portion indicated by the arrow V in FIG. 3, and FIG. 6 is a cross-sectional view of FIG. 5 as viewed from the VI-VI line.
The first protrusion 340 is formed by an outer wall surface 341-345.
The outer wall surface 341 is formed on the stator core 210 side along the axial direction, and extends along the radial direction and the circumferential direction. In the present embodiment, the outer wall surface 341 extends in a direction inclined with respect to the radial direction (details will be described later).
The outer wall surface 342 is formed on the side opposite to the stator core 210 along the axial direction, and extends along the radial direction and the circumferential direction. In the present embodiment, the outer wall surface 342 is formed flush with the second insulating member end surface 310A of the outer wall portion 310.
The outer wall surface 343 extends along the axial direction and the circumferential direction, and connects the outer wall surface 341 and the outer wall surface 342.
The outer wall surface 344 is formed on one side in the circumferential direction and extends along the radial direction and the axial direction. The outer wall surface 345 is formed on the other side in the circumferential direction and extends along the radial direction and the axial direction.
If the connection between the outer wall surfaces 341 to 345 of the first protrusion 340 is sharp (for example, a pin angle), the stator winding 230 may be damaged. Therefore, in the present embodiment, the connecting portions of the outer wall surfaces 341 to 345 of the first protruding portion 340 are formed on a curved surface (for example, an R surface).
The outer wall surface 341 corresponds to the "first outer wall surface" of the present invention, the outer wall surface 342 corresponds to the "second outer wall surface" of the present invention, and the outer wall surface 343 corresponds to the "third outer wall surface" of the present invention. Corresponds to "outer wall surface".

The outer wall surface 341 of the first protrusion 340 will be described with reference to FIG. Note that FIG. 6 is a cross section including a circumferential center line passing through the circumferential center of the outer wall surface 341 of the first protrusion 340 and a circumferential center line passing through the circumferential center of the outer wall surface 342. In the present specification, the cross section including the circumferential center line of the outer wall surface 341 of the first protrusion 340 and the circumferential center line of the outer wall surface 342 is referred to as "the circumferential center cross section of the first protrusion".
The first protrusion 340 is routed from the radial inner peripheral side of the outer wall portion 310 to the radial outer peripheral side via the notch 313, and the stator core 210 is routed from the first protrusion 340 along the axial direction. The stator winding 230 arranged on the side is restricted from moving to the side opposite to the stator core 210 along the axial direction, and is also restricted from moving to the outer peripheral side in the radial direction.
In the present embodiment, when viewed in the central cross section in the circumferential direction of the first protrusion 340 shown in FIG. 6, the length R along the radial direction of the outer wall surface 341 is greater than the diameter D mm of the stator winding 230. It is set long (so as to satisfy [D ≦ R]). Preferably, it is set within the range of D and 8D (so as to satisfy [D ≦ R ≦ 8D]). When the length R along the radial direction of the outer wall surface 341 is shorter than D, the effect of restricting the movement of the stator winding 230 to the outer peripheral side in the radial direction by the outer wall surface 341 of the first protrusion 340 is low, and it is longer than 8D. Then, the first protrusion 340 protrudes too much toward the outer peripheral side in the radial direction.
Further, the outer wall surface 341 has a distance K2 between the end portion on the inner peripheral side in the radial direction (the connection portion between the outer wall surface 341 and the outer wall portion outer wall surface 311 of the outer wall portion 310) and the first insulating member end surface 300A. Satisfy ([K2> K1] so that the distance between the end portion on the outer peripheral side in the radial direction (the connection portion between the outer wall surface 341 and the outer wall surface 343) and the end surface 300A of the first insulating member is longer than K1. ) It is tilted. The angle θ1 formed by the outer wall surface 341 and the outer wall portion outer peripheral surface 311 is set to an acute angle (so as to satisfy [θ1 <(90 degrees)]). Preferably, it is set to (60 degrees) or higher (so as to satisfy [60 degrees ≤ θ1 <(90 degrees)]), and more preferably, it is set within the range of (60 degrees) and (80 degrees). [(60 degrees) ≤ θ1 ≤ (80 degrees)] is set).
If the angle (θ1) is smaller than (60 degrees), the strength of the first protrusion 340 decreases. Further, by setting the angle (θ1) to be smaller than (80 degrees), the outer wall surface 341 of the first protrusion 340 more effectively restricts the stator winding 230 from moving to the outer peripheral side in the radial direction. can do.

In FIG. 6, the outer wall surface 341 of the first protrusion 340 is formed on a straight flat surface, but the shape of the outer wall surface 341 is not limited to this.
A modified example of the first protrusion 340 will be described with reference to FIG.
In the first protrusion 340 shown in FIG. 7, the outer wall surface 341 is formed on an arc surface protruding in the axial direction opposite to the stator core 210. It can also be formed on a curved surface other than an arcuate surface.
The modified example of the first protrusion 340 shown in FIG. 7 has the same effect as that of the first protrusion 340 shown in FIG.

Next, the second protrusion 350 will be described with reference to FIGS. 8 and 9. 8 is an enlarged view of the portion indicated by the arrow VIII of FIG. 3, and FIG. 9 is a cross-sectional view of FIG. 8 as viewed from the IX-IX line.
The second protrusion 350 is provided on the stator core 210 side of the first protrusion 340 along the axial direction.
The second protrusion 350 is formed by an outer wall surface 351 to 355.
The outer wall surface 351 is formed on the stator core 210 side along the axial direction, and extends along the radial direction and the circumferential direction. The outer wall surface 351 extends in a direction inclined with respect to the radial direction (details will be described later).
The outer wall surface 352 is formed on the side opposite to the stator core 210 along the axial direction, and extends along the radial direction and the circumferential direction. The outer wall surface 352 extends in a direction inclined with respect to the radial direction (details will be described later).
The outer wall surface 353 extends along the axial direction and the circumferential direction, and connects the outer wall surface 351 and the outer wall surface 352.
The outer wall surface 354 is formed on one side in the circumferential direction and extends along the radial direction and the axial direction. The outer wall surface 355 is formed on the other side in the circumferential direction and extends along the radial direction and the axial direction.
If the connecting portion between the outer wall surfaces 351 to 355 of the second protrusion 350 is sharp (for example, a pin angle), the stator winding 230 may be damaged. Therefore, in the present embodiment, the connecting portions of the outer wall surfaces 351 to 355 of the second protrusion 350 are formed on a curved surface (for example, an R surface).
The outer wall surface 351 corresponds to the "fourth outer wall surface" of the present invention, the outer wall surface 352 corresponds to the "fifth outer wall surface" of the present invention, and the outer wall surface 353 corresponds to the "sixth outer wall surface" of the present invention. Corresponds to "outer wall surface".

The outer wall surfaces 351 and 352 of the second protrusion 350 will be described with reference to FIG. Note that FIG. 9 is a cross section including a circumferential center line passing through the circumferential center of the outer wall surface 351 of the second protrusion 350 and a circumferential center line passing through the circumferential center of the outer wall surface 352. Corresponds to the "circumferential central cross section of the protrusion".
The second protrusion 350 is routed from the radial inner peripheral side of the outer wall portion 310 to the radial outer peripheral side via the notch 313, and the stator core 210 is routed from the second protrusion 350 along the axial direction. The stator winding 230 arranged on the opposite side of the shaft is restricted from moving toward the stator core 210 side along the axial direction, and is restricted from moving toward the outer peripheral side in the radial direction, and is also restricted in the axial direction. The stator winding 230 arranged on the stator core 210 side from the second protrusion 350 along the same direction restricts the movement of the stator winding 230 to the side opposite to the stator core 210 along the axial direction, and is on the outer peripheral side in the radial direction. Regulate moving to.

In the present embodiment, the length S along the radial direction of the outer wall surface 351 is larger than the diameter D mm of the stator winding 230 when viewed in the circumferential central cross section of the second protrusion 350 shown in FIG. It is set long (so as to satisfy [D ≦ S]). Preferably, it is set within the range of D and 8D (so as to satisfy [D ≦ S ≦ 8D]). When the length S along the radial direction of the outer wall surface 351 is shorter than D, the effect of restricting the movement of the stator winding 230 to the outer peripheral side in the radial direction by the outer wall surface 351 of the second protrusion 350 is low, and it is longer than 8D. Then, the second protrusion 350 protrudes too much toward the outer peripheral side in the radial direction.
Preferably, the length S along the radial direction of the outer wall surface 351 of the second protrusion 350 is set to be equal to the length R along the radial direction of the outer wall surface 341 of the first protrusion 340. To.
Further, the outer wall surface 351 has a distance L2 between the end portion on the inner peripheral side in the radial direction (the connection portion between the outer wall surface 351 and the outer wall portion outer wall surface 311 of the outer wall portion 310) and the first insulating member end surface 300A. Satisfy ([L2> L1] so that the distance between the end portion on the outer peripheral side in the radial direction (the connection portion between the outer wall surface 351 and the outer wall surface 353) and the end surface 300A of the first insulating member is longer than L1. ) It is tilted. The angle θ2 formed by the outer wall surface 351 and the outer wall portion outer peripheral surface 311 is set to an acute angle (so as to satisfy [θ2 <(90 degrees)]). Preferably, it is set to (60 degrees) or higher (so as to satisfy [60 degrees ≤ θ2 <(90 degrees)]), and more preferably, it is set within the range of (60 degrees) and (80 degrees). [(60 degrees) ≤ θ2 ≤ (80 degrees)] is set).
If the angle (θ2) is smaller than (60 degrees), the strength of the second protrusion 350 decreases. Further, by setting the angle (θ2) to be smaller than (80 degrees), the outer wall surface 351 of the second protrusion 340 more effectively restricts the stator winding 230 from moving to the outer peripheral side in the radial direction. can do.

Further, when viewed in the central cross section in the circumferential direction of the second protrusion 350 shown in FIG. 9, the length T along the radial direction of the outer wall surface 352 is longer than the diameter D mm of the stator winding 230 ([[ (D ≦ T] is set). Preferably, it is set within the range of D and 8D (so as to satisfy [D ≦ T ≦ 8D]). When the length T along the radial direction of the outer wall surface 352 is shorter than D, the effect of restricting the movement of the stator winding 230 to the outer peripheral side in the radial direction by the outer wall surface 352 of the second protrusion 350 is low, and it is longer than 8D. Then, the second protrusion 350 protrudes too much toward the outer peripheral side in the radial direction.
Preferably, the length T along the radial direction of the outer wall surface 352 of the second protrusion 350 is the length R along the radial direction of the outer wall surface 341 of the first protrusion 340 and the second. It is set to be equal to the length S along the radial direction of the outer wall surface 351 of the protrusion 350.
Further, the outer wall surface 352 has a distance M2 between the end portion on the inner peripheral side in the radial direction (the connection portion between the outer wall surface 352 and the outer wall portion outer wall surface 311 of the outer wall portion 310) and the first insulating member end surface 300A. The distance between the end portion on the outer peripheral side in the radial direction (the connection portion between the outer wall surface 352 and the outer wall surface 353) and the end surface 300A of the first insulating member is shorter than M1 (satisfying [M2 <M1]). ) It is tilted. The angle θ3 formed by the outer wall surface 352 and the outer wall portion outer peripheral surface 311 is set to an acute angle (so as to satisfy [θ3 <(90 degrees)]). Preferably, it is set to (60 degrees) or higher (so as to satisfy [60 degrees ≤ θ3 <(90 degrees)]), and more preferably, it is set within the range of (60 degrees) and (80 degrees). [(60 degrees) ≤ θ3 ≤ (80 degrees)] is set).
If the angle (θ3) is smaller than (60 degrees), the strength of the second protrusion 350 decreases. Further, by setting the angle (θ3) to be smaller than (80 degrees), the outer wall surface 352 of the second protrusion 340 more effectively restricts the stator winding 230 from moving to the outer peripheral side in the radial direction. can do.

In FIG. 9, the outer wall surfaces 351 and 352 of the second protrusion 350 are formed on a straight flat surface, but the shapes of the outer wall surface 351 and the outer wall surface 352 are not limited to this.
A modified example of the second protrusion 350 will be described with reference to FIG.
In the second protrusion 350 shown in FIG. 10, the outer wall surface 351 is formed in an arc protruding in the axial direction opposite to the stator core 210, and the outer wall surface 352 is along the axial direction. It is formed on an arc surface protruding toward the stator core 210 side. It can also be formed on a curved surface other than an arcuate surface.
The modified example of the second protrusion 350 shown in FIG. 10 has the same effect as that of the second protrusion 350 shown in FIG.

As described above, in the present embodiment, the stator winding 230 arranged on the stator core 210 side from the first protrusion 340 by the first protrusion 340 becomes the stator core along the axial direction. It is possible to regulate the movement to the opposite side and to regulate the movement to the outer peripheral side in the radial direction.
Further, the stator winding 230 arranged by the second protrusion 350 on the side opposite to the stator core 210 from the second protrusion 350 and on the stator core side from the first protrusion 340 is in the axial direction. It is possible to regulate the movement to the stator core side along the same, and to regulate the movement to the outer peripheral side in the radial direction.
Further, the second protrusion 350 restricts the stator winding 230 arranged on the stator core 210 side from the second protrusion 350 from moving to the side opposite to the stator core along the axial direction. It is possible to regulate the movement to the outer peripheral side in the radial direction.
Therefore, it is possible to prevent the stator winding 230 arranged on the outer peripheral side of the end insulating member 300 from coming into contact with other parts.

The present invention is not limited to the configuration described in the embodiment, and various changes, additions, and deletions can be made.
At least one first protrusion and second protrusion may be provided.
The first protrusion and the second protrusion are preferably arranged alternately along the circumferential direction, but the arrangement mode of the first protrusion and the second protrusion is not limited to this.
The first protrusion is preferably configured such that the second outer wall surface opposite the stator core along the axial direction is flush with the second insulating member end face of the outer wall portion. Not limited to this.
The second protrusion provided on the stator core side from the first protrusion along the axial direction is the first outer wall surface on the stator core side along the axial direction and the second protrusion on the side opposite to the stator core. It can also be configured to have either one of the outer wall surfaces of 2.
The second protrusion can be omitted.
A third protrusion may be provided on the stator core side of the second protrusion along the axial direction. The third protrusion may have at least one of a first outer wall surface on the stator core side and a second outer wall surface on the opposite side to the stator core along the axial direction. In this case, the first protrusion, the second protrusion, and the third protrusion are preferably arranged along the circumferential direction so as not to overlap each other, but the arrangement mode is not limited thereto.
The present invention can be configured as various types of electric motors. It can also be configured as a rotating machine of various types including an electric motor.

100 Motor 200 Stator 210 Stator core 210A, 210B Core end face 210a Rotor accommodation space 211 York 212 Teeth 213 Teeth base 214 Teeth tip 215 Teeth tip surface 216 Slot 220 Slot insulation member 230 Stator winding 300 End insulation member 300A First insulating member end face 300a Rotor accommodating space 310 Outer wall part 310A Second insulating member end face 311 Outer wall part outer peripheral surface 312 Outer wall part inner peripheral surface 313 Notch part 320 Inner wall part 320a Inner wall part tip surface 330 Connecting part 340 First Projection 341 outer wall surface (first outer wall surface)
342 outer wall surface (second outer wall surface)
343 outer wall surface (third outer wall surface)
344,345 Outer wall surface 350 Second protrusion 351 Outer wall surface (fourth outer wall surface)
352 outer wall surface (fifth outer wall surface)
353 outer wall surface (sixth outer wall surface)
354, 355 Outer wall surface 360 Positioning protrusion 400 Rotor 410 Rotor core 420 Rotor shaft

Claims (3)

An end insulating member arranged on at least one of both sides of the stator core in the axial direction.
Extending along the circumferential and axial directions, the inner peripheral surface of the outer wall portion on the inner peripheral side in the radial direction, the outer peripheral surface of the outer wall portion on the outer peripheral side in the radial direction, and the end surface of the first insulating member on the stator core side along the axial direction . An outer wall portion having a second insulating member end face on the side opposite to the stator core along the axial direction,
A plurality of inner wall portions arranged on the inner peripheral side in the radial direction from the outer wall portion and extending along the circumferential direction and the axial direction, and
It has a plurality of connecting portions extending along the radial direction and connecting the outer wall portion and the plurality of inner wall portions.
The outer wall portion has a notch portion that opens to the end surface of the second insulating member, the outer peripheral surface of the outer wall portion, and the inner peripheral surface of the outer wall portion on the side opposite to the stator core, and the outer peripheral surface in the radial direction from the outer peripheral surface of the outer wall portion. At least one first protrusion protruding into the stator core, and at least one second protrusion protruding radially from the outer peripheral surface of the outer wall portion to the stator core side. Have,
The first protrusion is a first outer wall surface on the stator core side along the axial direction, a second outer wall surface on the side opposite to the stator core along the axial direction, and the first outer wall surface on the radial outer peripheral side. a third outer wall surface connecting the first outer wall surface and said second outer wall surface, the circumferential direction of the first outer wall surface circumferential center line and said second outer wall surface through the circumferential center of the Looking at the circumferential central cross section of the first protrusion including the circumferential center line passing through the center, the length R along the radial direction of the first outer wall surface is the diameter D (mm) of the stator winding. And 8D (mm), and the angle θ1 formed by the first outer wall surface and the outer peripheral surface of the outer wall portion is within the range of 60 (degrees) and 80 (degrees). Consists of
The second protrusion has a fourth outer wall surface on the stator core side along the axial direction, a fifth outer wall surface on the side opposite to the stator core along the axial direction, and the second outer wall surface on the radial outer peripheral side. It has a sixth outer wall surface connecting the outer wall surface of No. 4 and the fifth outer wall surface, and has a circumferential center line passing through the circumferential center of the fourth outer wall surface and the circumferential direction of the fifth outer wall surface. Looking at the circumferential central cross section of the second protrusion including the circumferential center line passing through the center, the length S along the radial direction of the fourth outer wall surface is the stator winding diameter D (mm). And 8D (mm), and the angle θ2 formed by the fourth outer wall surface and the outer peripheral surface of the outer wall portion is within the range of 60 (degrees) and 80 (degrees). The length T along the radial direction of the fifth outer wall surface is within the range of the stator winding diameters D (mm) and 8D (mm), and the fifth outer wall surface is formed. The angle θ3 formed by the outer wall portion and the outer peripheral surface of the outer wall portion is configured to be within the range of 60 (degrees) and 80 (degrees).
A stator winding that is routed from the radial inner peripheral side of the outer wall portion to the radial outer peripheral side through the notch and is arranged on the stator core side from the first protrusion along the axial direction. However, the first protrusion regulates the movement to the side opposite to the stator core along the axial direction, and also regulates the movement to the outer peripheral side in the radial direction through the notch. The outer wall portion is routed from the radial inner peripheral side to the radial outer peripheral side, and is located on the side opposite to the stator core from the second protrusion along the axial direction, and the stator core from the first protrusion. The stator windings arranged on the side are restricted from moving toward the stator core side along the axial direction by the second protrusion, and are restricted from moving toward the outer peripheral side in the radial direction. , The stator winding that is routed from the radial inner peripheral side of the outer wall portion to the radial outer peripheral side through the notch and is arranged on the stator core side from the second protrusion along the axial direction. The second protrusion is configured to restrict the wire from moving along the axial direction to the opposite side of the stator core and to the outer peripheral side in the radial direction. An end insulating member characterized by being present. The end insulating member according to claim 1.
An end insulating member characterized in that the second outer wall surface of the first protrusion is formed flush with the end surface of the second insulating member. A rotor comprising a stator and a rotor, wherein the stator has a stator core, end insulating members arranged on both axial sides of the stator core, and a stator winding. A rotary machine, wherein the end insulating member according to claim 1 or 2 is used as the end insulating member.

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