CN113424404A

CN113424404A - Electric compressor

Info

Publication number: CN113424404A
Application number: CN202080013108.8A
Authority: CN
Inventors: 池田贵大; 金子淳史
Original assignee: Sanden Automotive Conponents Corp
Current assignee: Sanden Corp
Priority date: 2019-02-12
Filing date: 2020-01-10
Publication date: 2021-09-21
Also published as: JP2020129943A; JP7304165B2; WO2020166244A1; DE112020000776T5

Abstract

In the mounting structure of the connector member, an increase in cost is suppressed, and simplification of component management is achieved. The insulating material (22) to which the cluster case (31) is fitted and the insulating material (22) to which the cluster case (31) is not fitted are all formed in the same shape.

Description

Electric compressor

Technical Field

The present invention relates to an electric compressor.

Background

In patent document 1, in the electric compressor for a vehicle, an annular insulator (bobbin) is attached to one side of a stator core, and a connector member is detachably fitted to the insulator.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2015-183668

Disclosure of Invention

Technical problem to be solved by the invention

In the case where the insulator mounted to the stator core is divided and molded for each slot, the connector member is mounted to a part of the insulator. However, if the insulator to which the connector member is attached and the other insulators are molded in different shapes, the cost increases, and the parts management becomes complicated.

The technical problem of the invention is to suppress an increase in cost and to realize simplification of parts management in a mounting structure of a connector member.

Technical scheme for solving technical problem

An electric compressor according to an aspect of the present invention includes:

a plurality of winding frame members which are included in a stator of the motor and are individually molded for each slit groove around which a coil is wound; and

a connector member fitted to one end side of a part of the winding frame member in the axial direction of the motor and connected to an energizing terminal,

the winding frame member to which the connector member is fitted and the winding frame member to which the connector member is not fitted are all the same shape.

Effects of the invention

According to the present invention, since all the reel frame members have the same shape, it is possible to suppress an increase in cost and simplify the parts management.

Drawings

Fig. 1 is a sectional view of a compressor in an axial direction.

Fig. 2 is a view showing a stator.

Fig. 3 is a view showing an insulating member.

Fig. 4 is a diagram showing a cluster enclosure.

Fig. 5 is a diagram showing a state in which the cluster case is fitted.

Fig. 6 is a diagram showing a state in which the cluster case is fitted.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Each drawing is a schematic drawing, and may be different from an actual member. The following embodiments are intended to exemplify an apparatus and a method for embodying the technical idea of the present invention, and the structure is not specified to the following structure. That is, the technical idea of the present invention can be variously modified within the technical scope described in the claims.

One embodiment

Structure (of the related Art)

Fig. 1 is a sectional view of a compressor in an axial direction.

The compressor 11 (electric compressor) is an electric scroll compressor used in a refrigerant circuit of a vehicle air conditioner, for example. That is, when driven by a motor installed and built in a vehicle, refrigerant is sucked, compressed, and then discharged.

A motor 13 is housed inside a stator casing 12 of the compressor 11, which is kept airtight. The motor 13 includes: a stator 14 fixed to an inner peripheral surface of the stator housing 12; and a rotor 15 disposed inside the stator 14 to be rotatable.

The stator 14 includes a stator core 21, an insulator 22 (a winding frame member), and a coil 23. The stator core 21 is formed in an annular shape and fixed to the inner circumferential surface of the stator housing 12. The insulator 22 is a frame member around which the coil 23 is wound, and is fitted in a groove formed in the inner circumferential surface of the stator core 21. A rotating shaft 25 is rotatably supported inside the stator case 12, and a rotor 15 made of a permanent magnet is fixed to the rotating shaft 25.

An inverter housing portion 26 is formed on the front side of the stator housing 12, and a drive circuit 27 of the motor 13 is housed inside the inverter housing portion 26. The drive circuit 27 is connected to the coil 23 via an energizing terminal 28.

Fig. 2 is a view showing a stator.

Here, illustration of the coil 23 is omitted. The insulators 22 are, for example, insulating members molded from synthetic resin, the insulators 22 are individually molded for each of the slots around which the coils 23 are wound, and the insulators 22 are attached to the stator core 21, respectively. Here, an example of a three-phase dodecakout is shown.

A cluster case 31 (connector member) is fitted to the front side of a part of the insulator 22 in the axial direction. The cluster case 31 is a connector member including three phases, and the energizing terminal 28 is connected from the front side in the axial direction.

Fig. 3 is a view showing an insulating member.

In the drawings, (a) is a perspective view seen from the inside in the radial direction and the front side in the axial direction, and (b) is a perspective view seen from the outside in the radial direction and the front side in the axial direction. The insulator 22 has a projection plate 32 formed at a radially outer position at the axial front end thereof. The projecting plate 32 projects toward the front side in the axial direction and is disposed so that the plane direction is perpendicular to the radial direction. The projecting plate 32 is formed with an opening 33, and the opening 33 penetrates in the radial direction, i.e., the thickness direction, and allows the refrigerant to flow therethrough. The flow of the refrigerant through the opening 33 causes cooling of the coil 23. The insulator 22 has a winding protrusion 34 formed at the axial front end and at a radially inner position. The projection 34 projects toward the front side in the axial direction, and has a substantially T-shaped distal end portion as viewed in the axial direction, and the proximal end side of which one end side of the coil 23 is locked.

Fig. 4 is a diagram showing a cluster enclosure.

In the drawings, (a) is a perspective view seen from the outer side in the radial direction and the front side in the axial direction, and (b) is a perspective view seen from the inner side in the radial direction and the rear side in the axial direction. The cluster case 31 has two grooves 41 formed at positions on the rear side in the axial direction and on the outer side in the radial direction, and the grooves 41 are fitted to the front end portions of the projecting plates 32 of the insulator 22. Each groove portion 41 is formed by a pair of

projections

42, 43 spaced apart in the radial direction. The projecting portion 42 projects toward the rear side in the axial direction so as to extend along the radially outer surface of the projecting plate 32, and the projecting portion 43 projects toward the rear side in the axial direction so as to extend along the radially inner surface of the projecting plate 32. The protrusion 42 is formed in a substantially cross shape because the protrusion 43 is short and long, and the groove 41 is formed by the gap between the

protrusions

42 and 43.

The cluster case 31 is formed with a protruding portion 44 at a position on the axially rear side, radially outside, and between the protruding

portions

42, 43. The projecting portion 44 projects toward the rear side in the axial direction so as to extend along the radially outer surface of the projecting plate 32, and a claw portion 45 that is hooked to the opening 33 is formed at the front end of the projecting portion 44. The claw portion 45 is formed in a hook shape protruding inward in the radial direction. The claw portion 45 is hooked and held to the opening 33 of the projection plate 32 by the elasticity of the projection 44.

The cluster case 31 has a recess 46 formed on the rear surface in the axial direction, which fits the front end of the protrusion 34. The recess 46 is formed by a bushing 47. The boss 47 protrudes toward the rear side in the axial direction so as to surround the protrusion 34.

Fig. 5 is a diagram showing a state in which the cluster case is fitted.

In the figure, (a) is a perspective view seen from the inside in the radial direction, and (b) is a perspective view seen from the outside in the radial direction. The insulator 22 for fitting the groove 41 and the claw 45 of the cluster case 31 is only one of the insulators disposed at predetermined positions. When the cluster case 31 is fitted to the corresponding insulator 22, the distal end of the projecting plate 32 is fitted to the groove 41 between the projecting portion 42 and the projecting portion 43, and the claw portion 45 of the projecting portion 44 is hooked to the opening 33.

Fig. 6 is a diagram showing a state in which the cluster case is fitted.

The insulator 22 that fits the recess 46 of the cluster case 31 is only one of the insulators disposed at predetermined positions. Specifically, the insulators 22 to which the groove portions 41 and the claw portions 45 are fitted are clockwise adjacent insulators 22 as viewed from the front side in the axial direction. When the cluster case 31 is fitted to the corresponding insulator 22, the tip end of the protrusion 34 is fitted to the recess 46 of the boss 47.

In this way, the cluster case 31 is fitted to the two adjacent insulators 22, and the position in the axial direction and the direction orthogonal to the axial direction is restricted.

Action

Next, the main operational effects of the embodiment will be described.

In the present embodiment, the insulator 22 is divided into twelve parts so that the insulator 22 can be attached to each slot, and the cluster case 31 is attached to a part of the insulator 22. When the insulator 22 to which the cluster case 31 is attached and the other insulators 22 are molded in different shapes, the cost increases and the parts management becomes complicated.

Therefore, the insulator 22 to which the cluster case 31 is attached and the insulator 22 to which the cluster case 31 is not attached are all formed in the same shape. This can simplify component management while suppressing an increase in cost.

When the cluster case 31 is fitted to the insulator 22, the front end of the projection plate 32 is fitted to the groove 41 between the projection 42 and the projection 43. In this way, since the groove 41 is supported by the flat surface of the projecting plate 32, the position in the axial direction and the direction perpendicular to the axial direction can be regulated. The groove portions 41 are provided at two locations along the protruding plate 32. Therefore, the position of the axial direction and the direction orthogonal to the axial direction can be more effectively restricted.

The claw portion 45 of the protruding portion 44 is hooked on the opening 33. This can limit the position in the axial direction, and can suppress the cluster case 31 from rising from the insulator 22. The opening 33 is also formed in the conventional insulator 22, and the purpose thereof is to cool the coil 23 by the flow of the refrigerant. Therefore, since the conventional opening 33 can be used as it is, a significant design change is not required.

The tip of the protrusion 34 is fitted into the recess 46 of the boss 47. Since the boss 47 is supported by the distal end portion of the projection 34 in this way, the position in the axial direction and the direction orthogonal to the axial direction can be restricted. The projection 34 is also formed in the conventional insulator 22, and its purpose is to lock the coil 23. Therefore, since the conventional protrusion 34 can be used as it is, a significant design change is not required. The tip end of the projection 34 is formed in a substantially T-shape when viewed in the axial direction, and a recess 46 is formed to be fitted to the projection 34. Therefore, the position in the direction orthogonal to the axial direction can be particularly restricted.

Further, since the cluster case 31 is fitted to the two adjacent insulators 22, the position in the direction orthogonal to the axial direction can be effectively restricted.

Modifications of the examples

In the embodiment, the cluster case 31 in which the three-phase connector members are integrated is described, but the present invention is not limited thereto. The connector members of the respective phases may be separated from each other.

In the embodiment, the three-phase ac motor 13 is explained, but the present invention is not limited to this, and may be a single-phase ac motor.

In the embodiment, the scroll type electric compressor has been described, but the present invention is not limited to this, and can be applied to any electric compressor such as a swash plate compressor.

While the present invention has been described with respect to a limited number of embodiments, it will be apparent to those skilled in the art that variations may be made in the above-described embodiments without departing from the scope of the invention as defined by the appended claims.

(symbol description)

11 … compressor, 12 … stator case, 13 … motor, 14 … stator, 15 … rotor, 21 … stator core, 22 … insulator, 23 … coil, 25 … rotating shaft, 26 … inverter housing, 27 … driving circuit, 28 … energizing terminal, 31 … cluster case, 32 … protruding plate, 33 … opening, 34 … protruding part, 41 … groove part, 42 … protruding part, 43 … protruding part, 44 … protruding part, 45 … claw part, 46 … recess part, 47 … shaft sleeve.

Claims

1. An electric compressor, comprising:

a plurality of winding frame members which are included in a stator of the motor and are individually molded for each slit groove around which the coil is wound; and

a connector member fitted to one end side of a part of the winding frame member in the motor axial direction and connected with an energizing terminal,

2. The motor-driven compressor according to claim 1,

the winding frame member includes a protruding plate protruding toward one side in the motor axial direction,

the connector member includes a groove portion that is fitted to a front end portion of the projecting plate.

3. The motor-driven compressor according to claim 2,

the projection plate includes an opening portion penetrating in a thickness direction and allowing a refrigerant to flow therethrough,

the connector member includes a protruding portion that protrudes toward the other side in the motor axial direction so as to extend along one surface of the protruding plate, and a claw portion formed at a leading end of the protruding portion is hooked on the opening portion.

4. Motor compressor according to any one of claims 1 to 3,

the winding frame member includes a protrusion portion that protrudes toward one side in the motor axial direction and on a base end side of which one end side of the coil is locked,

the connector member includes a recess that is fitted with a front end of the protrusion.