WO2018173462A1

WO2018173462A1 - Stator and motor

Info

Publication number: WO2018173462A1
Application number: PCT/JP2018/002043
Authority: WO
Inventors: 田中　武
Original assignee: 日本電産テクノモータ株式会社
Priority date: 2017-03-21
Filing date: 2018-01-24
Publication date: 2018-09-27
Also published as: JP2020080580A

Abstract

This motor is provided with a rotor capable of rotating about a center axis, and also with a stator facing the rotor in a radial direction. The stator is provided with: a stator core; an insulator for covering at least a part of the stator core; a plurality of coil sections formed by winding a conductive wire around the teeth of the stator core with the insulator therebetween; wiring connected electrically to the conductive wire and led out to the outside; and containing members between coils, the containing members each having a first containing section provided between adjacent coil sections. The first containing sections contain first connection sections where the conductive wire and the wiring are connected.

Description

Stator and motor

The present invention relates to a stator and a motor.

In the coil part of the stator of the motor, the winding is wound around the stator core via an insulating member. The end of the winding is fixed using a member that receives the end. For example, in Patent Document 1, a winding is wound around a stator iron core via an insulating member, and a winding terminal receiving portion is formed on the insulating member. Then, by attaching a stator side connecting member having two convex portions protruding in the axial direction to the winding terminal receiving portion, the end of the winding and the lead wire for supplying power to each winding are fixed. The

JP 2001-197699 A

By the way, in recent years, there has been an increasing demand for miniaturization of motors attached to devices. For example, with miniaturization of refrigerator compressors and the like, miniaturization of motors is desired. In many cases, each component of the motor is attached to be overlapped in the axial direction. For this reason, it is particularly desired to suppress an increase in dimension in the axial direction of the motor.

However, in the structure of Patent Document 1, since the two convex portions protrude in the axial direction from the stator side connecting member, the dimension in the axial direction of the stator becomes large.

In view of the above situation, an object of the present invention is to provide a stator and a motor that can suppress an increase in dimension in the axial direction.

In order to achieve the above object, an exemplary stator of the present invention includes a core back portion that is arranged in a circumferential direction around a central axis, and a plurality of teeth portions that extend in a radial direction from the core back portion. A stator core, an insulator covering at least a part of the stator core, a plurality of coil portions in which a conductive wire is wound around the teeth portion via the insulator, a wiring electrically connected to the conductive wire and drawn to the outside, An inter-coil housing member having a first housing portion provided between the adjacent coil portions, wherein the first housing portion houses a first connection portion to which the conductive wire and the wiring are connected; Is done.

In order to achieve the above object, an exemplary motor of the present invention includes a rotor that can rotate around a central axis and the stator that faces the rotor in the radial direction.

The exemplary stator and motor of the present invention can suppress an increase in dimension in the axial direction.

FIG. 1 is a cross-sectional view illustrating a configuration example of a motor according to the embodiment. FIG. 2 is a perspective view of the stator according to the embodiment. FIG. 3 is a local enlarged view in the vicinity of the cylindrical member. FIG. 4 is a perspective view illustrating a configuration example of the inter-coil housing member according to the embodiment. FIG. 5 is a diagram illustrating an example of an attachment structure of the inter-coil housing member. FIG. 6A is a perspective view showing the inter-coil housing member in the vicinity of the groove. FIG. 6B is a cross-sectional view of the vicinity of the groove viewed from the circumferential direction. FIG. 7 is a perspective view illustrating a first configuration example of the first housing portion. FIG. 8 is a perspective view illustrating a second configuration example of the first housing portion.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings.

In the present specification, in the motor 100 and the stator 2, a direction parallel to the central axis CA is referred to as an “axial direction”. Furthermore, in the axial direction, one direction from the stator core 21 toward the inter-coil housing member 25 is referred to as “upward”, and the other direction from the inter-coil housing member 25 toward the stator core 21 is referred to as “downward”. In addition, on the surface of each component, the surface facing upward in the axial direction is called “upper surface”, and the surface facing downward in the axial direction is called “lower surface”.

Further, a direction orthogonal to the central axis CA is referred to as a “radial direction”, and a circumferential direction around the central axis CA is referred to as a “circumferential direction”. Furthermore, in the radial direction, a direction toward the central axis CA is referred to as “inward”, and a direction away from the central axis CA is referred to as “outward”. Further, of the side surfaces of each component, a side surface facing inward in the radial direction is called an “inner side surface”, and a side surface facing outward in the radial direction is called an “outer side surface”.

It should be noted that the names of directions and planes described above do not indicate the positional relationship and direction when incorporated in an actual device.

<1. Embodiment>
<1-1. General configuration of motor>
FIG. 1 is a cross-sectional view illustrating a configuration example of a motor 100 according to the embodiment. In FIG. 1, the motor 100 is cut along a cut surface including the central axis CA of the motor 100. A motor 100 illustrated in FIG. 1 is, for example, an outer rotor type three-phase motor included in a refrigerator compressor. However, the use of the motor 100 is not limited to this example.

As shown in FIG. 1, the motor 100 includes a rotor 1, a shaft 10 that extends in the vertical direction along the central axis CA, an annular stator 2, a bearing 31, a bearing holding portion 32, and a motor mounting portion 4. Have.

The rotor 1 can rotate around the central axis CA. The rotor 1 includes a rotor holding member 11 and a magnet 12. The shaft 10 is a rotating shaft attached to the rotor 1 and can be rotated together with the rotor 1.

The rotor holding member 11 is a member that holds the magnet 12. The rotor holding member 11 includes a plate portion 111 and a cylindrical portion 112. The plate part 111 is a plate-shaped member extending radially outward from the central axis CA and an annular member centering on the central axis CA. The cylindrical portion 112 is a cylindrical member and extends upward in the axial direction from the periphery of the plate portion 111. The magnet 12 is held on the inner surface of the cylindrical portion 112 and faces the outer surface of the stator 2.

The stator 2 has an annular shape centered on the central axis CA, and faces the rotor 1 in the radial direction to drive the rotor 1. More specifically, the stator 21 faces the magnet 12 of the rotor 1 on the inner side in the radial direction of the rotor 1. The configuration of the stator 2 will be described later.

The bearing 31 supports the shaft 10 rotatably. The bearing 31 is not particularly limited, but may be, for example, a ball bearing or a cylindrical sleeve bearing. The bearing holding part 32 holds the bearing 31. The motor attachment portion 4 is provided radially outward from the bearing holding portion 32 and accommodates at least a part of the stator 2.

<1-2. Structure of stator>
Next, the configuration of the stator 2 will be described. FIG. 2 is a perspective view of the stator 2 according to the embodiment. The stator 2 includes a stator core 21, an insulator 22, a plurality of coil portions 23, a wiring 24, an inter-coil housing member 25, and a tubular member 26.

The stator core 21 is an iron core member composed of laminated steel plates in which electromagnetic steel plates are laminated in the axial direction, for example. The stator core 21 includes a core back portion 211 disposed in the circumferential direction around the central axis CA, and a plurality of tooth portions 212 extending from the core back portion 211 in the radial direction. More specifically, the core back portion 211 may be an annular member centered on the central axis CA. Alternatively, there may be a plurality of core back portions 211, which may be arranged side by side in the circumferential direction. Further, the tooth portion 212 extends from the core back portion 211 outward in the radial direction.

The insulator 22 is a resin insulating material, for example, and covers at least a part of the stator core 21. The method for providing the insulator 22 is not particularly limited. The insulator 22 may be provided on the stator core 21 by integral molding, for example, or may be a member attached separately from the stator core 21. The insulator 22 has an insulator wall portion 221 and a first fitting portion 222. The insulator wall portion 221 extends in the axial direction from the stator core 21 at each tooth portion 212. Each insulator wall portion 221 has a claw portion 221a extending outward from the insulator wall portion 221 in the radial direction. The 1st fitting part 222 is provided between the edge parts in the radial direction outward of the different teeth part 212, for example, and protrudes in the axial direction from the edge part in the radial direction of the teeth part 221. In addition, the number of each of the insulator wall part 221, the nail | claw part 221a, and the 1st fitting part 222 may be plural as shown in FIG. 2, and may be one.

The insulator 22 is provided with a groove 223 extending in the circumferential direction. The groove part 223 is open on one side in the axial direction (that is, on the upper side in the axial direction). In addition, although the groove part 223 is provided in the edge part in the radial inside (namely, the core back part 211 side) of the teeth part 221 seeing from an axial direction in FIG. 2, it is not limited to this illustration. The groove portion 223 may be provided at an end portion on the outer side in the radial direction of the tooth portion 221 (that is, the distal end side of the tooth portion 212) when viewed from the axial direction. Alternatively, the groove portion 223 may be provided at both ends in the radial direction of the teeth portion 221 (that is, both the inner end portion and the outer end portion) when viewed from the axial direction. At least one of the conductive wire 23 a and the wiring 24 is accommodated in the groove portion 223. If it carries out like this, the movement in the radial direction of the line | wire (namely, at least one of the conducting wire 23a and the wiring 24) accommodated in the groove part 223 can be suppressed or prevented. Therefore, the wire accommodated in the groove part 223 can be prevented from touching the shaft 10, the coil part 23, etc. of the rotor 1, for example. In addition, the conducting wire 23 accommodated in the groove part 223 is a crossover between the coil parts 23, for example. Moreover, the wiring 24 accommodated in the groove part 223 is, for example, a power supply line that is electrically connected to the conductive wire 23a of each coil part 23 and drawn to the outside.

The plurality of coil portions 23 are provided in each of the tooth portions 212 via the insulator 22. In other words, the coil portion 23 is provided by winding the conductive wire 23 a around each tooth portion 212 via the insulator 22. The plurality of coil units 23 are supplied with three-phase (U-phase, V-phase, W-phase) AC power having different phases. More specifically, the plurality of coil units 23 are each composed of a U-phase coil unit to which U-phase power is supplied, a V-phase coil unit to which V-phase power is supplied, and V to which V-phase power is supplied. And a phase coil portion. The U-phase coil unit, the V-phase coil unit, and the V-phase coil unit are Y-connected.

The wiring 24 is a lead wire that is electrically connected to the stator 2. The wiring 24 is electrically connected to the conductive wire 23a of each coil portion 23 and drawn to the outside, and is electrically connected to a power source (not shown) or a control circuit (not shown) outside the stator 2.

The inter-coil housing member 25 is made of, for example, resin, and is attached to the upper end of the stator 2 in the axial direction. The configuration of the inter-coil housing member 25 will be described later.

The cylindrical member 26 is a member that accommodates the first connection portion 23b or the second connection portion 23c. FIG. 3 is a local enlarged view in the vicinity of the cylindrical member 26. As shown in FIG. 3, the cylindrical member 26 has a cylindrical shape extending in the radial direction, and is accommodated in a first accommodating portion 250 a described later of the inter-coil accommodating member 25. The first connection part 23b is a connection part in which the conducting wire 23a and the wiring 24 are connected. The second connection portion 23c is a connection portion in which the conductive wires 23a of different coil portions 23 are connected to each other. The second connection portion 23c is, for example, a neutral point of the Y connection by connecting the conductive wires 23a of the U-phase coil portion, the V-phase coil portion, and the W-phase coil portion 23 of the plurality of coil portions 23. Connection. The connection method of each line in the 1st connection part 23b or the 2nd connection part 23c is not specifically limited. In the first connection portion 23b, the conductive wire 23a and the wiring 24 may be soldered, for example, after being brought into electrical contact with each other, or may be fixed using an adhesive or the like. Or the 1st connection part 23b may be crimped | bonded by crimping the plastic member (for example, splice terminal) which bundles the conducting wire 23a and the wiring 24. FIG. The same applies to the second connection portion 23c.

The cylindrical member 26 protects the first connection portion 23b or the second connection portion 23c against an object outside the cylindrical member 26. For example, the cylindrical member 26 protects the first connection portion 23b or the second connection portion 23c against moisture, dust, and the like, and the first connection portion 23b or the second connection portion 23c is accommodated between the coils by vibration or the like. This prevents contact with the member 25 (particularly each component of the first housing portion 250a).

The material of the cylindrical member 26 is not particularly limited, and for example, metal, ceramic, resin, or the like can be used, but a material having electrical insulation is preferable. In this way, the cylindrical member 26 can insulate the internal first connection part 23b or the second connection part 23c, and can prevent the occurrence of problems such as a short circuit with an external object.

<1-3. Configuration of inter-coil housing member>
FIG. 4 is a perspective view illustrating a configuration example of the inter-coil housing member 25 according to the embodiment. FIG. 5 is a diagram illustrating an example of an attachment structure of the inter-coil housing member 25. FIG. 6A is a perspective view showing the inter-coil housing member 25 in the vicinity of the groove 223. FIG. 6B is a cross-sectional view of the vicinity of the groove 223 viewed from the circumferential direction. FIG. 6B shows a cross section taken along the broken line AA in FIG. 6A.

The inter-coil housing member 25 includes a first housing portion 250a, a second housing portion 250b, a plate portion 254, and a connecting member 255 extending in the circumferential direction.

The 1st accommodating part 250a and the 2nd accommodating part 250b are provided between the adjacent coil parts 23. FIG. The plurality of first accommodating portions 250a are arranged side by side in the circumferential direction as viewed from the axial direction together with the second accommodating portion 250b.

Moreover, the 1st accommodating part 250a and the 2nd accommodating part 250b have overlapped with the upper end part in the axial direction of the coil part 23 seeing from the circumferential direction. In addition, it is not limited to this illustration, The 1st accommodating part 250a and the 2nd accommodating part 250b should just overlap with either the upper end part or the lower end part in the axial direction of the coil part 23 seeing from the circumferential direction. . The distance between the adjacent coil portions 23 increases as the distance between the upper end portion and the lower end portion in the axial direction of the coil portion 23 increases. Therefore, the width in the circumferential direction of the 1st accommodating part 250a and the 2nd accommodating part 250b can be made wider.

The 1st accommodating part 250a accommodates the 1st connection part 23b or the 2nd connection part 23c. In this way, the first connection portion 23b between the conductive wire 23a and the wiring 24, or the second connection portion 23c, which is the neutral point of the plurality of Y-connected coil portions 23, is provided between the adjacent coil portions 23. Is accommodated in the first accommodating portion 250a. Therefore, an increase in the dimension of the stator 2 in the axial direction parallel to the central axis CA can be suppressed. The specific configuration of the first housing part 250a will be described later.

In addition, although the 1st connection part 23b or the 2nd connection part 23c may be directly accommodated in the 1st accommodating part 250a, it is accommodated using the cylindrical member 26 desirably. The cylindrical member 26 extends in the radial direction in the first storage portion 250a. The inner end of the cylindrical member 26 in the radial direction is opened and accommodates the first connection portion 23b or the second connection portion 23c inserted from the inner end. The outer end in the radial direction of the cylindrical member 26 may be opened, but is preferably closed. If it carries out like this, the 1st connection part 23b or the 2nd connection part 23c accommodated in the inside can be prevented from contacting the external connection member 255b, or it protrudes from the outer end in the radial direction of the cylindrical member 26, and other members (For example, the coil part 23) can be prevented from being short-circuited.

The second accommodating portion 250b accommodates the wiring 24 drawn out of the stator 2. In this way, even when the motor 100 is used in a device having a large vibration such as a compressor, it is possible to suppress the displacement of the wiring 24 due to the vibration. Further, the wiring 24 drawn to the outside is accommodated in the second accommodating portion 250b provided between the adjacent coil portions 23. Therefore, an increase in the dimension of the stator 2 in the axial direction parallel to the central axis CA can be suppressed. In addition, the structure of the 2nd accommodating part 250b is the same as that of the 1st accommodating part 250a. Therefore, the description is omitted.

The plate portion 254 is provided between the adjacent coil portions 23. Each plate portion 254 extends downward in the axial direction from the first housing portion 250a and the second housing portion 250b between the adjacent coil portions 23. In this way, the adjacent coil parts 23 can be partitioned by the plate part 254. Therefore, by providing the plate portion 254 using an insulating material such as a resin material, the insulation between the adjacent coil portions 23 can be enhanced.

The connecting member 255 extends in the circumferential direction, and connects each end portion in at least two radial directions of the plurality of first accommodating portions 250a and second accommodating portions 250b. More specifically, the connecting member 255 connects the ends on the radially inner side and the ends on the radially outer side. In this way, by arranging the inter-coil housing member 25, a plurality of first housing portions 250a can be provided in the stator at a time. In particular, when the plate portion 254 is provided in the inter-coil housing member 25, a plurality of plate portions 254 can be provided at a time between the adjacent coil portions 23 by attaching the inter-coil housing member 25.

The connecting member 255 includes an inner connecting member 255a, an outer connecting member 255b, a second fitting portion 255c, and a rib 255d. The inner connecting member 255a connects at least two radially inner ends of the plurality of first storage portions 250a and second storage portions 250b. The outer connecting member 255b is annular and connects at least two radially outer ends of the plurality of first accommodating portions 250a and second accommodating portions 250b. By providing the inner connecting member 255a and the annular outer connecting member 255b, the strength of the inter-coil housing member 25 can be improved. Furthermore, since the strength of the first housing portion 250a and the second housing portion 250b can be improved, the shapes of the first housing portion 250a and the second housing portion 250b can be easily maintained.

Further, when viewed from the circumferential direction, the connecting member 255 is above the groove 223 in the axial direction. For example, as illustrated in FIG. 6B, the inner connecting member 255 a is positioned above the groove portion 223 in the axial direction in the axial direction. By so doing, it is possible to suppress or prevent the wire (that is, at least one of the conductive wire 23 a and the wiring 24) accommodated in the groove 223 from moving out of the groove 223.

Further, at least a part of the connecting member 255 overlaps the groove 223 when viewed from the axial direction. For example, when viewed from the axial direction, the inner connecting member 255 a overlaps the groove portion 223. In other words, a part or all of the groove 223 that opens upward in the axial direction is covered with the inner connecting member 255a. In this way, a line (that is, at least one of the conductive wire 23a and the wiring 24) accommodated in the groove portion 223 by at least a part of the connecting member 255 above (that is, on the opening side) the groove portion 223 in the axial direction. Can be further suppressed or prevented from moving out of the groove 223.

When the inter-coil housing member 25 is attached, the connecting member 255 is attached to the insulator wall 221. More specifically, each insulator wall 221 is fitted inside the outer connecting member 255b, and a press-fit structure between the outer connecting member 255b and each insulator wall 221 is formed. Furthermore, the claw part 221a provided in the insulator wall part 221 hits on the upper end part in the axial direction of the connection member 255 in the axial direction at the time of attachment. In this case, the inter-coil housing member 25 can be securely attached to the stator core 21 by a structure such as a snap fit.

The second fitting portion 255c is a convex portion provided on the outer connecting member 255b and protrudes to the other side in the axial direction (that is, downward in the axial direction). Note that the number of the second fitting portions 255c may be plural (for example, the same number as the first fitting portions 222) or one (for example, see FIG. 4). The second fitting portion 255c fits into the first fitting portion 222 of the insulator 22 when the inter-coil housing member 25 is attached. By fitting the second fitting portion 255 c into the first fitting portion 222, it is possible to prevent the inter-coil housing member 25 having the connecting member 255 from rotating in the circumferential direction with respect to the stator core 21 covered by the insulator 22. . In addition, it is not limited to the illustration of this embodiment, When the 1st fitting part 222 is a convex part, the 2nd fitting part 255c may be a recessed part. That is, it is only necessary that one of the first fitting portion 222 and the second fitting portion 255c is fitted to the other of the first fitting portion 222 and the second fitting portion 255c.

Ribs 255d are provided on the connecting member 255. The number of ribs 255d may be plural (see, for example, FIG. 3) or one. The rib 255d overlaps with the groove portion 223 when viewed from the axial direction, and extends in the axial direction toward the groove portion 223. In this way, the movement of the wire accommodated in the groove 223 (that is, at least one of the conducting wire 23a and the wiring 24) in the axial direction can be suppressed or prevented by the rib 255d. Moreover, the wire accommodated in the groove part 223 can also be pushed into the back of the groove part 223 by the rib 255d. Therefore, the wire accommodated in the groove 223 can be more reliably suppressed or prevented from moving out of the groove 223.

<1-4. Configuration of first housing section>
Next, a specific configuration of the first housing part 250a will be described.

<1-4-1. First Configuration Example of First Storage Unit>
FIG. 7 is a perspective view showing a first configuration example of the first housing portion 250a. As shown in FIG. 7, the upper side in the axial direction of the first housing part 250a is opened, and the lower side in the axial direction of the first housing part 250a is closed.

7 includes a pair of wall portions 251 and an extension portion 252. A pair of wall part 251 is provided in the both sides of the 1st accommodating part 250a in the circumferential direction. The extending portion 252 is provided at an end portion on the upper side in the axial direction of the wall portion 251 and extends in the circumferential direction between the pair of wall portions 251 when viewed from the axial direction. If it carries out like this, the movement to the circumferential direction of the 1st connection part 23b accommodated in the 1st accommodating part 250a can be prevented with a pair of wall part 251. FIG. Further, the extension portion 252 can suppress or prevent the first connecting portion 23b from moving in the axial direction and coming out of the first accommodating portion 250a. In FIG. 7, the extended portion 252 is provided on both of the pair of wall portions 251, but is not limited to this example, and may be provided on at least one of the wall portions 251.

The space | interval in the circumferential direction between a pair of wall parts 251 becomes wide as it goes to the upper side from the downward direction of an axial direction. The gap between the adjacent coil portions 23 becomes wider as approaching the upper end portion or the lower end portion in the axial direction of the stator core 21. Therefore, by adopting the configuration of FIG. 7, the first accommodating portion 250 a can be shaped according to the gap between the adjacent coil portions 23.

Also, the wall 251 is provided with an opening 251a that is larger than the extension 252 when viewed from the axial direction. More specifically, the opening 251a is provided in the wall portion 251 in which the extending portion 252 is provided. By providing the opening 251a in the wall portion 251, when the inter-coil housing member 25 (particularly, the extended portion 252) is formed using a die, the die can be pulled up and down at both ends in the axial direction. Therefore, it becomes easy to mold the inter-coil housing member 25 using a mold.

<1-4-2. Second Configuration Example of First Storage Unit>
FIG. 8 is a perspective view showing a second configuration example of the first housing portion 250a. As shown in FIG. 8, the first accommodating portion 250a is closed on the lower side in the axial direction of the first accommodating portion 250a. In the following, the second configuration example will be described while referring to differences from the first configuration example (see FIG. 7).

The 1st accommodating part 250a of FIG. 8 has a pair of wall part 251 and the cover part 253. FIG. A pair of wall part 251 is provided in the both sides of the 1st accommodating part 250a in the circumferential direction. The lid portion 253 is provided on the upper side in the axial direction of the pair of wall portions 251 and covers the upper side in the axial direction of the first housing portion 250a. If it carries out like this, the movement to the circumferential direction of the 1st connection part 23b accommodated in the 1st accommodating part 250a can be prevented with a pair of wall part 251. FIG. Further, the lid portion 253 can suppress or prevent the first connecting portion 23b from moving in the axial direction and coming out of the first accommodating portion 250a.

In addition, the cover part 253 may be provided detachably with respect to a pair of wall part 251, and may be fixed to the pair of wall part 251 using the adhesive agent etc., for example.

Further, in FIG. 8, the opening 251 a is not provided in the wall portion 251. However, the present invention is not limited to this example, and the opening 251a may be provided in the wall portion 251. By doing so, the material for molding the first accommodating portion 250a of FIG. 8 can be reduced.

<2. Other>
The embodiment of the present invention has been described above. The scope of the present invention is not limited to the above-described embodiment. The present invention can be implemented with various modifications without departing from the spirit of the invention. In addition, the items described in the above embodiments can be arbitrarily combined as long as no contradiction occurs.

For example, the motor 100 is an outer rotor type motor in which the magnet 12 of the rotor 1 is disposed radially outward from the stator 2 in the above-described embodiment. Alternatively, it may be an inner rotor type motor in which the magnet 12 of the rotor 1 is arranged inward in the radial direction. In this case, in the stator core 21, the tooth portion 212 extends radially inward from the core back portion 211.

The present invention is useful for a stator of a motor that is desired to be downsized.

DESCRIPTION OF SYMBOLS 100 ... Motor, 1 ... Rotor, 10 ... Shaft, 11 ... Rotor holding member, 111 ... Plate part, 112 ... Cylindrical part, 12 ... Magnet, 2 ... Stator, 21 ... Stator core, 211 ... Core back part, 212 ... Teeth part, 22 ... Insulator, 221 ... Insulator wall part, 221a ... Claw part, 222 ... First Fitting part, 223 ... groove part, 23 ... coil part, 23a ... winding, 23b ... first connection part, 23c ... second connection part, 24 ... wiring, 25 .. Inter-coil housing member, 250... Housing portion, 250a... First housing portion, 250b... Second housing portion, 251... Wall portion, 251a. Part, 253 ... lid part, 254 ... plate part, 255 ... connecting part 255a ... Inner connecting member, 255b ... Outer connecting member, 255c ... Second fitting part, 255d ... Rib, 26 ... Cylindrical member, 31 ... Bearing, 32 ...・ Bearing holding part, 4 ... Motor mounting part, CA ... Center shaft

Claims

A stator core having a core back portion arranged in the circumferential direction around a central axis, and a plurality of teeth portions extending in a radial direction from the core back portion;
An insulator covering at least a part of the stator core;
A plurality of coil portions in which a conductive wire is wound around the teeth portion via the insulator;
A wiring electrically connected to the conducting wire and drawn to the outside;
An inter-coil housing member having a first housing portion provided between the adjacent coil portions;
With
The first accommodating portion is a stator that accommodates a first connecting portion in which the conducting wire and the wiring are connected.
The stator according to claim 1, wherein the first housing portion overlaps with an end portion in the axial direction of the coil portion when viewed from the circumferential direction.
One side in the axial direction of the first accommodating part is opened,
The other side of the first accommodating portion in the axial direction is closed;
The first accommodating portion is
A pair of wall portions provided on both sides of the first housing portion in the circumferential direction;
An extension portion provided at an end portion on the one side in the axial direction of at least one of the wall portions,
The stator according to claim 1, wherein the extension portion extends in a circumferential direction between the pair of wall portions when viewed from the axial direction.
The other side of the first accommodating portion in the axial direction is closed;
The first accommodating portion is
A pair of wall portions provided on both sides of the first housing portion in the circumferential direction;
The stator according to claim 1, further comprising: a lid portion provided on one axial side of the pair of wall portions and covering the one axial side of the first housing portion.
The stator according to claim 3 or 4, wherein the inter-coil housing member further includes a plate portion extending in the axial direction from the first housing portion between the adjacent coil portions.
The stator according to any one of claims 3 to 5, wherein an interval in a circumferential direction between the pair of wall portions becomes wider from the other side in the axial direction toward the one side.
The stator according to any one of claims 3 to 6, wherein the wall portion is provided with an opening larger than the extension portion when viewed in the axial direction.
A plurality of the first accommodating portions are arranged in the circumferential direction,
The inter-coil housing member further includes a connecting member extending in the circumferential direction,
The stator according to any one of claims 1 to 7, wherein the connecting member connects end portions in a radial direction of at least two of the first housing portions.
The connecting member is
An inner connecting member that connects at least two radially inner ends of the first housing part;
An annular outer coupling member that couples the radially outer ends of the plurality of first housing parts;
The stator according to claim 8.
The insulator has an insulator wall portion extending in an axial direction from the stator core at an end portion in a radial direction of each of the tooth portions,
The stator according to claim 8 or 9, wherein the connecting member is attached to the insulator wall.
The insulator wall portion has a claw portion extending in a radial direction from the insulator wall portion,
The stator according to claim 10, wherein the claw portion hits an end portion of the connecting member in the axial direction in the axial direction.
The insulator further includes a first fitting portion provided at an end portion in a radial direction of the teeth portion,
The connecting member has the second fitting portion,
The stator according to any one of claims 8 to 11, wherein one of the first fitting portion and the second fitting portion is fitted to the other.
Further comprising a cylindrical member extending in the radial direction,
The stator according to any one of claims 1 to 12, wherein the cylindrical member accommodates the first connection portion of the conducting wire and the wiring, and is accommodated in the first accommodation portion.
In the insulator, a groove portion extending in the circumferential direction is provided at one end or both ends in the radial direction of the tooth portion as viewed from the axial direction,
The stator according to any one of claims 1 to 13, wherein at least one of the conductive wire and the wiring is accommodated in the groove portion.
The groove portion opens on one side in the axial direction,
The stator according to claim 14, wherein the connecting member is on one side in the axial direction with respect to the groove.
The stator according to claim 15, wherein at least a part of the connecting member overlaps the groove when viewed from the axial direction.
The connecting member has a rib that overlaps the groove when viewed from the axial direction;
The stator according to any one of claims 14 to 16, wherein the rib extends in an axial direction toward the groove.
The stator according to any one of claims 1 to 17, wherein the inter-coil accommodating member further includes a second accommodating portion that is provided between the adjacent coil portions and accommodates the wiring drawn out to the outside.
The plurality of coil portions include a U-phase coil portion, a V-phase coil portion, and a W-phase coil portion,
The U-phase coil unit, the V-phase coil unit, and the W-phase coil unit are Y-connected,
The first housing portion further includes a second connection portion that is connected to the conductive wires of the U-phase coil portion, the V-phase coil portion, and the W-phase coil portion to be a neutral point of the Y connection. The stator according to any one of claims 1 to 18, which is accommodated.
A rotor rotatable about a central axis;
The stator according to any one of claims 1 to 19, which faces the rotor in a radial direction;
Motor with.