CN211351842U

CN211351842U - Electric machine

Info

Publication number: CN211351842U
Application number: CN202020186164.9U
Authority: CN
Inventors: 刘宝山; 张斌
Original assignee: BYD Co Ltd; BYD Auto Co Ltd
Current assignee: BYD Co Ltd; BYD Auto Co Ltd
Priority date: 2020-02-19
Filing date: 2020-02-19
Publication date: 2020-08-25
Anticipated expiration: 2030-02-19

Abstract

The utility model discloses a motor, motor includes: a housing having a plurality of slots formed on an inner circumferential surface thereof; the stator core is arranged in the shell and comprises a stator yoke portion, a plurality of stator teeth and a plurality of yoke portion teeth, the stator yoke portion is formed into an annular structure, the plurality of stator teeth are arranged on the inner circumferential surface of the stator yoke portion along the circumferential direction of the stator yoke portion, the outer circumferential surface of the stator yoke portion is provided with a plurality of yoke portion teeth, and the plurality of yoke portion teeth are matched in the tooth grooves respectively. According to the utility model discloses a motor, a plurality of yoke portion tooth can increase the area of contact of stator core and casing, improves the radiating efficiency of motor. Moreover, the matching strength of the stator core and the shell can be improved, and vibration and noise are reduced. In addition, the tooth socket can play a good role in positioning and guiding, so that assembly positioning can be performed more conveniently and rapidly, the assembly difficulty is reduced, the working time is saved, the automatic production is facilitated, and the production benefit can be improved.

Description

Electric machine

Technical Field

The utility model belongs to the technical field of the motor manufacturing technique and specifically relates to a motor is related to.

Background

The stator is the stationary part of the motor or generator. The stator consists of three parts, namely a stator iron core, a stator winding and a machine base.

In the related art, in order to reduce the weight of the stator core and increase the heat dissipation area of the surface of the stator core, the outer ring of the stator core is usually sliced, and then the splicing blocks are independently assembled on the stator core. However, since the stator core and the splicing blocks are not of an integral structure, the matching strength of the stator core and the casing is reduced, the material cost and the assembly time are increased, and the production and the manufacture are not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a motor, the stator core of motor is higher with the cooperation intensity of casing, and can reduce assembly man-hour, the manufacturing of being convenient for.

According to the utility model discloses motor, include: a housing having a plurality of slots formed on an inner circumferential surface thereof; the stator core is arranged in the shell and comprises a stator yoke portion, a plurality of stator teeth and a plurality of yoke teeth, the stator yoke portion is formed into an annular structure, the stator teeth are arranged on the inner circumferential surface of the stator yoke portion along the circumferential direction of the stator yoke portion, the outer circumferential surface of the stator yoke portion is provided with a plurality of yoke teeth, and the yoke teeth are matched in the tooth grooves respectively.

According to the utility model discloses motor is equipped with a plurality of yoke teeth through the outer peripheral face at stator yoke, and a plurality of yoke teeth can increase the area of contact of stator core and casing to improve the radiating efficiency of motor. Moreover, compared with the existing motor, the motor has the advantages that the splicing blocks are not required to be arranged, the matching strength of the stator core and the shell can be improved, the motor is more stable in the operation process, the vibration and the noise are reduced, the material cost can be reduced, the assembly time is reduced, and the production and the manufacturing are convenient. In addition, through making a plurality of yoke portion teeth cooperate respectively in a plurality of tooth grooves, the tooth groove can play fine location direction's effect to can make things convenient for more fast assembly positioning, reduce the assembly degree of difficulty, save man-hour, and the automated production of being convenient for can improve the productivity effect.

According to some embodiments of the invention, the outer peripheral face of the stator yoke portion has a plurality of cut edge portions, each of which is provided with at least one yoke tooth, along the circumference of the stator yoke portion.

According to some embodiments of the invention, each yoke tooth has a width that gradually increases from inside to outside.

According to some embodiments of the invention, each yoke tooth is shaped as an isosceles trapezoid.

According to some embodiments of the invention, the yoke teeth are at least four.

According to some embodiments of the invention, each of the gullets is formed as a blind slot.

According to some embodiments of the invention, the inner peripheral surface of the casing is adapted to the shape of the outer peripheral surface of the stator core.

According to some embodiments of the invention, the plurality of yoke teeth are arranged symmetrically about a center of the stator yoke.

According to some embodiments of the invention, the stator core comprises a plurality of stator segments arranged in a stack, each stator segment comprising the stator yoke, a plurality of the stator teeth and a plurality of the yoke teeth.

According to some embodiments of the invention, each stator segment comprises a stator yoke, a plurality of stator teeth and a plurality of yoke teeth, which are integrally formed.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a partial perspective view of an electric machine according to an embodiment of the present invention;

FIG. 2 is a top view of the motor shown in FIG. 1;

fig. 3 is a perspective view of a stator core of the electric machine shown in fig. 1;

fig. 4 is a structural schematic view of the cut edge portion and the yoke teeth of the stator core shown in fig. 3;

FIG. 5 is a perspective view of a housing of the motor shown in FIG. 1;

fig. 6 is a schematic view of the assembly of the stator core and the housing according to the embodiment of the present invention.

Reference numerals:

100: a motor;

1: a housing; 11: a tooth socket; 2: a stator core; 21: a stator yoke;

22: stator teeth; 23: a yoke tooth; 24: and (5) trimming the edge.

Detailed Description

Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.

An electric machine 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 6.

As shown in fig. 1, 2 and 6, a motor 100 according to an embodiment of the present invention includes a housing 1 and a stator core 2.

Specifically, a plurality of slots 11 are formed on the inner circumferential surface of the housing 1. The stator core 2 is disposed in the housing 1, the stator core 2 includes a stator yoke 21, a plurality of stator teeth 22, and a plurality of yoke teeth 23, the stator yoke 21 is formed in an annular structure, the plurality of stator teeth 22 are disposed on an inner circumferential surface of the stator yoke 21 along a circumferential direction of the stator yoke 21, the outer circumferential surface of the stator yoke 21 is provided with the plurality of yoke teeth 23, and the plurality of yoke teeth 23 are respectively fitted in the plurality of slots 11. In the description of the present invention, "a plurality" means two or more.

For example, in the example of fig. 1 to 3, 5, and 6, the stator core 2 includes six yoke teeth 23, and the six yoke teeth 23 are provided at intervals on the outer circumferential surface of the stator yoke 21. A plurality of tooth grooves 11 are formed on the inner circumferential surface of the casing 1. The inner circumferential surface of the stator yoke 21 is provided with a plurality of stator teeth 22, and the plurality of stator teeth 22 are provided at intervals in the circumferential direction of the stator yoke 21. When mounting, the housing 1 is fixed, and then the stator core 2 is inserted into the housing 1 such that the yoke teeth 23 of the stator core 2 are engaged with the slots 11 of the housing 1. Thus, by providing the plurality of yoke teeth 23, the plurality of yoke teeth 23 can increase the contact area between the stator core 2 and the housing 1, thereby improving the heat dissipation efficiency. Moreover, compare with current motor, can need not to set up the splice, can improve stator core 2 and casing 1's cooperation intensity, make whole motor 100's structure more reliable and stable, make motor 100 more steady in the operation process, reduce Vibration and Noise, improve motor 100's NVH (Noise, Vibration, Harshness, Noise, Vibration and acoustic Vibration roughness) performance, and can reduce material cost, reduce during the assembly, be convenient for manufacture. In addition, through making a plurality of yoke teeth 23 cooperate respectively in a plurality of tooth's socket 11, tooth's socket 11 can play fine location guiding's effect to can make things convenient for fast assembly positioning more, reduce the assembly degree of difficulty, save man-hour, and be convenient for automated production, can improve production efficiency.

Six yoke teeth 23 are shown in fig. 1-3 and 6 for illustrative purposes, but it will be apparent to those skilled in the art after reading the present disclosure that the application of this solution to other numbers of yoke teeth 23 is within the scope of the present invention.

According to the utility model discloses motor 100, through being equipped with a plurality of yoke teeth 23 at the outer peripheral face of stator yoke 21, a plurality of yoke teeth 23 can increase the area of contact of stator core 2 with casing 1 to improve motor 100's radiating efficiency. Moreover, compared with the existing motor, the motor can be free from arranging the splicing blocks, the matching strength of the stator core 2 and the shell 1 can be improved, the motor 100 is more stable in the operation process, the vibration and the noise are reduced, the material cost can be reduced, the assembly time is reduced, and the production and the manufacture are convenient. In addition, through making a plurality of yoke teeth 23 cooperate respectively in a plurality of tooth's socket 11, tooth's socket 11 can play fine location guiding's effect to can make things convenient for fast assembly positioning more, reduce the assembly degree of difficulty, save man-hour, and be convenient for automated production, can improve production efficiency.

In some embodiments of the present invention, with reference to fig. 2-4 and 6, the outer circumferential surface of the stator yoke 21 has a plurality of cut-off portions 24 arranged along the circumferential direction of the stator yoke 21, and each cut-off portion 24 is provided with at least one yoke tooth 23. For example, in the example of fig. 2 to 4 and 6, the outer circumferential surface of the stator yoke 21 has six cutaway portions 24, the six cutaway portions 24 are provided at intervals in the circumferential direction of the stator yoke 21, and one yoke tooth 23 is provided on each cutaway portion 24. The longitudinal section of the edge cutting portion 24 may be a plane or a curved surface. Thus, by providing the above-described chamfered portions 24, the plurality of chamfered portions 24 can reduce the weight of the entire stator core 2, thereby reducing the cost. Furthermore, the trimming portion 24 can increase the zero-order modal frequency of the stator core 2, thereby improving the vibration response of the stator core 2 to the zero-order radial force wave.

Alternatively, as shown in fig. 1 to 3 and 6, a plurality of yoke teeth 23 and a plurality of chamfered portions 24 may correspond one to one. For example, six yoke teeth 23 and six chamfered sections 24 are shown in the example of fig. 1-3 and 6, one yoke tooth 23 being provided on each chamfered section 24. So set up, stator core 2's simple structure, convenient processing can reduce manufacturing cost.

In some embodiments of the present invention, referring to fig. 1-4 and 6, the width of each yoke tooth 23 gradually increases from inside to outside. Here, it should be noted that the direction "outer" is understood to be a direction away from the center of the stator core 2, and the opposite direction is defined as "inner", i.e., a direction toward the center of the stator core 2. For example, in the example of fig. 3, 4, and 6, each yoke tooth 23 is generally a dovetail profile structure, and the width of the yoke tooth 23 gradually increases in a direction away from the center of the stator core 2. So set up, can realize stator core 2 and casing 1's tight fit, avoid stator core 2 and casing 1 to break away from the cooperation.

Alternatively, in conjunction with fig. 2-4, each yoke tooth 23 may be shaped as an isosceles trapezoid or the like. Therefore, the stator core 2 is ensured to be tightly matched with the casing 1, and meanwhile, the yoke teeth 23 are simple in structure and convenient to process.

In some embodiments of the present invention, referring to fig. 1-3 and 6, the yoke teeth 23 are at least four. Specifically, for example, when the yoke teeth 23 are less than four, the number of yoke teeth 23 is too small, the contact area of the stator core 2 with the housing 1 is too small, and the heat dissipation efficiency is low. Thus, by setting the number of yoke teeth 23 to at least four, the contact area between the stator core 2 and the housing 1 can be increased, and the heat dissipation efficiency of the entire stator core 2 can be improved.

Alternatively, as shown in fig. 5, each tooth groove 11 is formed as a blind groove. For example, in the example of fig. 5, the upper end of the slot 11 penetrates the top of the cabinet 1, the lower end of the slot 11 does not penetrate the bottom of the cabinet 1, and a certain distance is provided between the lower end of the slot 11 and the bottom of the cabinet 1. During assembly, the stator core 2 is inserted into the housing 1 such that the yoke teeth 23 of the stator core 2 are engaged with the tooth grooves 11 of the housing 1. When the yoke teeth 23 contact the lower ends of the slots 11, the stator core 2 is completely assembled with the housing 1. Optionally, after the assembly is completed, heat treatment may be performed to ensure that the casing 1 and the stator core 2 have a certain magnitude of thermal interference, so as to ensure the matching strength of the stator core 2 and the casing 1. Therefore, each tooth groove 11 is a blind groove, the blind grooves can play a role in stopping and limiting, and the assembly accuracy and reliability of the stator core 2 and the machine shell 1 are guaranteed.

In some embodiments of the present invention, referring to fig. 3, 5 and 6, the inner peripheral surface of the housing 1 is adapted to the shape of the outer peripheral surface of the stator core 2. From this, through the aforesaid setting, make the cooperation between casing 1 and the stator core 2 inseparabler, can guarantee casing 1 and stator core 2's assembly precision, guarantee whole motor 100's structural stability, and can make motor 100 more steady in the operation process, reduce vibration and noise.

Alternatively, in conjunction with fig. 2, 3, and 6, the plurality of yoke teeth 23 are arranged symmetrically about the center of the stator yoke 21. From this, stator core 2's simple structure, the shaping degree of difficulty is lower to can reduce cost.

In some optional embodiments of the present invention, the stator core 2 comprises a plurality of stator segments (not shown) arranged in a stack, each stator segment comprising a stator yoke 21, a plurality of stator teeth 22 and a plurality of yoke teeth 23. Thus, by providing the stator core 2 with a plurality of laminated stator pieces, the lamination accuracy of the plurality of stator pieces is high, the mechanical rigidity is high, and the handling is facilitated. Alternatively, the casing 1 may be cast from a cast aluminum material.

Alternatively, the stator yoke 21, the plurality of stator teeth 22, and the plurality of yoke teeth 23 of each stator segment may be integrally molded. So set up, can strengthen stator core 2 and casing 1's cooperation intensity, further promoted the stability of motor 100 in the operation process to reduce vibration and noise. Moreover, the processing difficulty can be reduced, and the working hours can be saved.

Other configurations of the motor 100, such as a rotor and the like, and operations according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric machine, comprising:

a housing having a plurality of slots formed on an inner circumferential surface thereof;

the stator core is arranged in the shell and comprises a stator yoke portion, a plurality of stator teeth and a plurality of yoke teeth, the stator yoke portion is formed into an annular structure, the stator teeth are arranged on the inner circumferential surface of the stator yoke portion along the circumferential direction of the stator yoke portion, the outer circumferential surface of the stator yoke portion is provided with a plurality of yoke teeth, and the yoke teeth are matched in the tooth grooves respectively.

2. The electric machine of claim 1, wherein the outer circumferential surface of the stator yoke portion has a plurality of chamfered portions disposed along a circumferential direction of the stator yoke portion, each of the chamfered portions being provided with at least one yoke tooth.

3. The electric machine of claim 1 wherein the width of each yoke tooth increases from inside to outside.

4. The electric machine of claim 1 wherein each yoke tooth is shaped as an isosceles trapezoid.

5. The electric machine of claim 1, wherein the yoke teeth are at least four.

6. The electric machine of claim 1 wherein each of said tooth slots is formed as a blind slot.

7. The electric machine according to claim 1, wherein an inner peripheral surface of the housing is adapted to a shape of an outer peripheral surface of the stator core.

8. The electric machine of any of claims 1-7, wherein a plurality of the yoke teeth are arranged symmetrically about a center of the stator yoke.

9. The electric machine of any of claims 1-7, wherein the stator core comprises a plurality of stator segments arranged in a stack, each of the stator segments comprising the stator yoke, a plurality of the stator teeth, and a plurality of the yoke teeth.

10. The electric machine of claim 9, wherein the stator yoke, the plurality of stator teeth, and the plurality of yoke teeth of each of the stator plates are integrally formed.