CN106451829B

CN106451829B - Electric machine

Info

Publication number: CN106451829B
Application number: CN201610926753.4A
Authority: CN
Inventors: 张闯; 陈飞龙; 钟成堡; 肖胜宇; 刘娜
Original assignee: Gree Electric Appliances Inc of Zhuhai; Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai; Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2016-10-24
Filing date: 2016-10-24
Publication date: 2020-08-11
Anticipated expiration: 2036-10-24
Also published as: CN106451829A

Abstract

The invention relates to the technical field of motors, in particular to a motor. The motor comprises a stator assembly, an end cover, a bulge and a groove, wherein the bulge is arranged on one of the stator assembly and the end cover, and the groove is arranged on the other one; the stator assembly and the end cover are matched through a fool-proof structure formed by inserting the protrusions and the grooves. According to the invention, the fool-proof structure formed by the bulges and the grooves is arranged between the stator assembly and the end cover, so that the problem of rework caused by wrong assembly of the end cover in the assembling process can be prevented. Simultaneously, because the setting of arch and recess has increased the area of contact between end cover and the stator module, can make stator module's heat pass through protruding and the cooperation transmission of recess to the end cover on, finally distribute away the heat by the end cover, improved stator module's radiating efficiency.

Description

Electric machine

Technical Field

The invention relates to the technical field of motors, in particular to a motor.

Background

The structure of the prior art motor is shown in fig. 1. The stator core, the winding coil, the insulating frame and the wiring board are integrally molded by resin to form a subassembly 1'. An encoder 5 'for detecting the position of the rotor is fixed to the rear cover 2' by a fixing plate with screws, as shown in fig. 2. When the rear end cover is assembled, due to the structural characteristics of the rear end cover 2 ', the assembled rear end cover 2' has 4 possible states, namely, a threaded hole of a locking screw of the encoder 5 'can affect the wire outlet position of the encoder wire 7' at any one of the upper position, the lower position, the left position and the right position, and rework is caused.

In the prior art, the motor is required to be miniaturized, but the existing motor structure cannot meet the heat dissipation requirement of the miniaturized motor.

Therefore, the motor capable of solving the problems that the assembly error is easy to occur and the heat dissipation effect is poor in the existing end cover assembly process is provided.

Disclosure of Invention

The invention aims to provide a motor, which can solve the problems that the existing end cover is easy to be installed in a wrong way and has poor heat dissipation effect in the assembling process.

In order to achieve the purpose, the invention adopts the following technical scheme:

the motor comprises a stator assembly, an end cover, a bulge and a groove, wherein the bulge is arranged on one of the stator assembly and the end cover, and the groove is arranged on the other one;

the stator assembly and the end cover are matched through a fool-proof structure formed by inserting the protrusions and the grooves.

As a preferable scheme of the motor, the motor comprises a plurality of bulges and grooves which are distributed in one-to-one correspondence with the bulges;

the plurality of lobes are non-centrosymmetrically distributed with respect to a center of the stator assembly or the end cap.

As a preferable scheme of the motor, the plurality of protrusions have the same structure, and the plurality of protrusions are non-uniformly distributed on the stator assembly or the end cover.

As a preferable scheme of the motor, the motor at least comprises two structural patterns of protrusions.

As a preferable scheme of the motor, after the protrusion and the groove are inserted, the protrusion and the groove are tightly matched.

As a preferable scheme of the motor, after the protrusion and the groove are inserted, a gap exists between the protrusion and the groove.

As a preferable mode of the above motor, the cross section of the projection is circular, fan-shaped or triangular.

As a preferable scheme of the above motor, the end cap includes a front end cap and a rear end cap, and a fool-proof structure is provided between at least the rear end cap and the stator assembly, wherein the protrusion is provided on the stator assembly, and the groove is provided on the rear end cap.

As a preferable scheme of the motor, the motor further comprises a screw, and the end cover and the motor casing are fastened through the screw.

The invention has the beneficial effects that: according to the invention, the fool-proof structure formed by the bulges and the grooves is arranged between the stator assembly and the end cover, so that the problem of rework caused by wrong assembly of the end cover in the assembling process can be prevented. Simultaneously, because the setting of arch and recess has increased the area of contact between end cover and the stator module, can make stator module's heat pass through protruding and the cooperation transmission of recess to the end cover on, finally distribute away the heat by the end cover, improved stator module's radiating efficiency.

Drawings

FIG. 1 is a prior art electric machine configuration;

FIG. 2 is a schematic view of an assembled structure of a rear end cap in the prior art;

FIG. 3 is a schematic structural diagram of a motor according to an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at "I";

FIG. 5 is a schematic structural diagram of a stator provided in accordance with an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an end cap according to an embodiment of the present invention.

Wherein:

1: a stator assembly; 2: an end cap; 3: a protrusion; 4: a groove; 5: an encoder; 6: a motor housing;

1': a stator assembly; 2': an end cap; 5': an encoder; 7': an encoder line.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 3 to 6, the present embodiment provides an electric machine including a stator assembly 1 and an end cap 2, and a protrusion 3 and a groove 4. The projection 3 is provided on one of the stator assembly 1 and the end cap 2 and the groove 4 is provided on the other.

The stator assembly 1 and the end cover 2 are matched through a fool-proof structure formed by splicing the protrusions 3 and the grooves 4.

In this embodiment, through being provided with the fool-proof structure that arch 3 and recess 4 formed between stator module 1 and end cover 2, can prevent end cover 2 in the assembling process, because of the rework problem that the dress mistake leads to. Simultaneously, because setting up of arch 3 and recess 4, increased the area of contact between end cover 2 and the stator module 1, can make stator module 1's heat pass through arch 3 and recess 4's cooperation and transmit to end cover 2 on, finally distribute away the heat by end cover 2, improved stator module 1's radiating efficiency.

The specific structural style of fool-proof structure, motor include a plurality of archs 3 to and be the recess 4 that the one-to-one distributes with a plurality of archs 3, a plurality of archs 3 are the non-centrosymmetric distribution for stator module 1 or the center of end cover 2. Here, the one-to-one distribution refers to: the number and shape of the projections 3 and the recesses 4 are in a one-to-one correspondence, i.e. each projection 3 can be inserted into one recess 4 corresponding thereto.

The plurality of protrusions 3 have the same structure, and the plurality of protrusions 3 are non-uniformly distributed on the stator assembly 1 or the end cover 2. Due to the fact that the plurality of protrusions 3 are unevenly distributed on the stator assembly 1, only one matching form between the stator assembly 1 and the end cover 2 can be guaranteed, and the problem of error installation in the assembling process of the end cover 2 is prevented.

For convenience of explanation, the arrangement of the protrusions 3 and the grooves 4 is defined herein as the arrangement of the protrusions 3, because the protrusions 3 and the grooves 4 are correspondingly arranged and cooperate with each other. As long as the position of one is determined, the position of the other should also be determined. For example, the projections 3 are provided on the stator assembly 1 and the corresponding recesses 4 are certainly provided on the end cap 2, the projections 3 being non-uniformly distributed and the recesses 4 being correspondingly non-uniformly distributed.

Specifically, the stator assembly 1 is provided with a plurality of non-uniformly distributed protrusions 3, and the end cover 2 is correspondingly provided with a plurality of non-uniformly distributed grooves 4.

In this embodiment, another form of arrangement of the projection 3 and the groove 4 is also provided. Comprises at least two structural patterns of the protrusions 3. The structural style herein refers to a size, a shape, and the like. Due to the difference in the structural pattern between the protrusions 3, the plurality of protrusions 3 may be uniformly distributed or may be non-uniformly distributed.

Specifically, referring to fig. 5 and 6, 5 protrusions 3 are uniformly distributed on the axial end surface of the stator assembly 1 along the circumferential direction, and the end cover 2 is provided with a groove 4 at a corresponding position. The cross sections of the 5 bulges 3 are in fan shapes, but the sizes of the bulges 3 are different, and the matching form of the bulges 3 and the grooves 4 in the structural form only has one matching form in the assembling process, so that the situation of reverse assembly cannot occur. Except for the above, the fitting of 5 projections 3, 4 of which are round projections 3 and one of which is a square projection 3, in the form of a projection 3 and a recess 4, does not occur in the opposite way.

After the protrusion 3 and the groove 4 are mutually inserted, two matching forms exist:

the protrusion 3 and the groove 4 are tightly matched, and the matching form can improve the matching tightness between the end cover 2 and the stator assembly 1.

After the protrusion 3 and the groove 4 are spliced, a gap exists between the protrusion 3 and the groove 4, and the splicing between the protrusion 3 and the groove 4 can be facilitated due to the matching mode of the protrusion 3 and the groove 4. The specific matching form of the protrusion 3 and the groove 4 can be selected according to actual needs.

The cross section of the protrusion 3 is circular, fan-shaped or triangular, and the corresponding groove 4 has a corresponding shape, although the protrusion 3 and the groove 4 have other structural forms.

The end cover 2 comprises a front end cover and a rear end cover, and a fool-proof structure is arranged between the rear end cover and the stator assembly 1 at least, wherein the bulge 3 is arranged on the stator assembly 1, and the groove 4 is arranged on the rear end cover. In this embodiment, it is preferable to provide a fool-proof structure between the back cover and the stator assembly 1, because the encoder 5 is provided on the back cover, the position of the encoder 5 is determined, and it is necessary to prevent the back cover from having a problem of reverse installation.

The motor also comprises a screw, and the end cover 2 and the motor shell 6 are fastened through the screw. The end cover 2 is fixed with the motor shell 6 through screws, so that the stator assembly 1 can be limited to rotate relative to the motor shell 6 by matching the protrusions 3 with the grooves 4, and particularly for a high-power motor, the structure is more beneficial, and the reliability of the motor is improved.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.

Claims

1. A motor comprises a stator assembly (1) and an end cover (2), wherein the end cover (2) comprises a front end cover and a rear end cover, and is characterized in that an encoder (5) is arranged on the rear end cover, the motor also comprises a bulge (3) and a groove (4), the bulge (3) is arranged on one of the stator assembly (1) and the rear end cover, and the groove (4) is arranged on the other one;

the stator assembly (1) is matched with the rear end cover through a foolproof structure formed by splicing a bulge (3) and a groove (4);

the foolproof structure at least comprises bulges (3) with two structure styles and grooves (4) which are distributed in a one-to-one correspondence mode with the bulges (3), and the bulges (3) are non-uniformly distributed relative to the center of the stator assembly (1) or the end cover (2);

the one-to-one correspondence distribution is as follows: the number and the shape of the bulges (3) are in one-to-one correspondence with those of the grooves (4), the cross sections of the bulges (3) are circular, fan-shaped or triangular, and each bulge (3) can be inserted into one groove (4) corresponding to the bulge;

after the protrusion (3) and the groove (4) are spliced, the protrusion (3) and the groove (4) are tightly matched.

2. The machine according to claim 1, characterized in that, after the protrusions (3) and the grooves (4) are inserted, a gap is present between them.

3. The machine according to claim 1, further comprising screws, wherein the end cover (2) and the machine housing (6) are fastened by screws.