CN220915053U

CN220915053U - Shell assembly, driving motor and electric vehicle

Info

Publication number: CN220915053U
Application number: CN202322583736.3U
Authority: CN
Inventors: 彭万军
Original assignee: BYD Co Ltd; Huizhou BYD Battery Co Ltd
Current assignee: BYD Co Ltd; Huizhou BYD Battery Co Ltd
Priority date: 2023-09-22
Filing date: 2023-09-22
Publication date: 2024-05-07
Anticipated expiration: 2033-09-22

Abstract

The application provides a housing assembly, a driving motor and an electric vehicle. The housing assembly includes: the bearing comprises a shell, a bearing sleeve and a bearing, wherein the shell is provided with a bearing cavity, the bearing sleeve is arranged in the bearing cavity, one side of the bearing sleeve, facing the bearing cavity, is provided with a first flange, and the bearing is arranged in the bearing sleeve. In the technical scheme of the application, a bearing sleeve is arranged between a bearing and a bearing cavity, and the bearing sleeve is integrally formed in the bearing cavity in a pre-casting mode; the bearing housing is arranged, so that on one hand, the wear resistance between the bearing and the bearing cavity can be increased, the possibility of relative rotation between the bearing and the bearing cavity is reduced, and on the other hand, the bearing housing can avoid direct contact between the bearing and the bearing cavity, and abrasion to the bearing cavity when the bearing rotates relatively is avoided.

Description

Shell assembly, driving motor and electric vehicle

Technical Field

The application relates to the technical field of bearing supporting devices, in particular to a shell assembly, a driving motor and an electric vehicle.

Background

Bearings are widely used in the assembly of a rotor, for example, a drive motor typically including a housing and a motor shaft, the housing defining a bearing cavity in which a rotor is rotatably supported by the bearings.

In the related art, during the process of supporting the rotor, the balls of the bearing may rub against the bearing raceways, thereby causing the bearing to generate a large amount of heat. This heat is transferred through the bearing cup to the bearing cavity, causing thermal expansion of the bearing and the bearing cavity. The bearing cavity of the driving motor is made of aluminum alloy, and the thermal expansion coefficient of the bearing cavity is larger than that of the bearing, so that when the bearing heats, the outward expansion speed of the bearing cavity is higher than that of the bearing, a gap is formed between the bearing and the bearing cavity, and relative sliding can be generated through the gap, so that the bearing cavity is abraded.

Disclosure of utility model

The application aims to provide a shell assembly, a driving motor and an electric vehicle, and aims to solve the problem that after a pre-casting process, a bearing sleeve is not firmly connected with a shell.

To achieve the object of the application, in a first aspect, the application provides a housing assembly comprising:

A housing formed with a bearing cavity;

The bearing sleeve is arranged in the bearing cavity, a first flange is arranged on one side, facing the bearing cavity, of the bearing sleeve, and at least part of the first flange is fixedly connected with the shell; and

And the bearing is arranged in the bearing sleeve.

In one possible implementation, the bearing sleeve is further provided with a second flange, the first flange being provided at one end of the bearing sleeve, and the second flange being provided at the other end of the bearing sleeve.

In one possible implementation, a plurality of flat structures are provided along the circumference of the first flange, which faces the side of the bearing cavity.

In one possible implementation manner, a step surface extending towards the inside of the bearing sleeve is formed on one end, close to the bottom of the bearing cavity, of the inner wall of the bearing sleeve, and the bearing abuts against the step surface.

In one possible implementation, the inner wall surface of the bearing sleeve is provided with a sealing groove; the housing assembly further comprises a sealing ring, and the sealing ring is arranged in the sealing groove.

In one possible implementation, the housing assembly further includes a platen connected to the housing, the platen covering an orifice of the bearing cavity.

In one possible implementation manner, the pressing plate is provided with a through hole, the shell is provided with a first connecting hole, and the shell assembly further comprises a fixing piece, and the fixing piece is arranged through the through hole in a penetrating mode and is detachably connected with the first connecting hole.

In one possible implementation, an adhesive layer is provided between the inner wall of the bearing housing and the outer wall of the bearing.

In a second aspect, the present application also proposes a drive motor comprising a housing assembly comprising:

A housing formed with a bearing cavity;

And the bearing is arranged in the bearing sleeve.

In a third aspect, the present application also proposes an electric vehicle comprising a drive motor comprising a housing assembly comprising:

A housing formed with a bearing cavity;

And the bearing is arranged in the bearing sleeve.

In the technical scheme of the application, a bearing sleeve is arranged between a bearing and a bearing cavity, and the bearing sleeve is integrally formed in the bearing cavity in a pre-casting mode; the bearing housing is arranged, so that on one hand, the wear resistance between the bearing and the bearing cavity can be increased, the possibility of relative rotation between the bearing and the bearing cavity is reduced, and on the other hand, the bearing housing can avoid direct contact between the bearing and the bearing cavity, and abrasion to the bearing cavity when the bearing rotates relatively is avoided. Meanwhile, the bearing sleeve is provided with first flanges on one side facing the bearing cavity, and the first flanges can be clamped into the shell during casting and forming of the shell and are fixedly connected with the formed shell into a whole, so that the contact area between the bearing sleeve and the shell is increased, the connection stability of the bearing sleeve and the shell is improved, and the bearing sleeve is prevented from falling out of the shell during working of the bearing.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the application, and that other drawings can be obtained from them without inventive effort for a person skilled in the art.

Fig. 1 is a cross-sectional view of a drive motor provided by the present application;

FIG. 2 is an exploded view of a housing assembly provided by the present application;

FIG. 3 is a schematic perspective view of the housing of FIG. 1;

FIG. 4 is a schematic perspective view of the bearing housing of FIG. 1;

fig. 5 is a schematic perspective view of the platen of fig. 1.

Reference numerals illustrate:

10000. a driving motor;

1000. A housing assembly;

1a shell, 11 a bearing cavity and 12 a first connecting hole;

2a bearing sleeve, 21 a first flange, 22a second flange, 23 a flat structure, 24 steps and 25 sealing grooves;

3, a bearing;

4, pressing plates, 41 through holes, 42 avoiding holes, 5 fixing pieces and 6 sealing rings;

2000 motor shaft.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to fall within the scope of the present application.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

Referring to fig. 1, 2 and 3, the present application provides a driving motor 10000, wherein the driving motor 10000 includes a motor shaft 2000 and a housing assembly 1000. The motor shaft 2000 is disposed through the housing assembly 1000, and the housing assembly 1000 includes: the bearing comprises a shell 1, a bearing sleeve 2 and a bearing 3, wherein the shell 1 is provided with a bearing cavity 11, the bearing sleeve 2 is arranged in the bearing cavity 11, a first flange 21 is arranged on one side, facing the bearing cavity 11, of the bearing sleeve 2, and the bearing 3 is arranged in the bearing sleeve 2. The motor shaft 2000 is inserted into the bearing 3.

In the technical scheme of the application, a bearing sleeve 2 is arranged between a bearing 3 and a bearing cavity 11, and the bearing sleeve 2 is integrally formed in the bearing cavity 11 in a pre-casting mode; the arrangement of the bearing sleeve 2 can increase the wear resistance between the bearing 3 and the bearing cavity 11 on one hand and reduce the possibility of relative rotation between the bearing 3 and the bearing cavity 11, and in the second aspect, the bearing sleeve 2 can prevent the bearing 3 from directly contacting with the bearing cavity 11 and avoid abrasion to the bearing cavity 11 when the bearing 3 rotates relatively.

It should be noted that, pre-casting refers to that before the motor housing 1 is cast, the bearing sleeve 2 is put into the casting mold of the motor housing 1 in advance, during the casting process of the housing 1, the bearing sleeve 2 will contact with casting liquid, and after the motor housing 1 is cast, the bearing sleeve 2 can be connected with the housing 1 after casting is completed into a whole.

Meanwhile, in the application, the side of the bearing sleeve 2 facing the bearing cavity 11 is provided with the first flange 21, and the first flange 21 can be clamped into the shell 1 during casting molding of the shell 1 and is integrated with the molded shell 1, so that the contact area between the bearing sleeve 2 and the shell 1 is increased, the connection stability of the bearing sleeve 2 and the shell 1 is improved, and the bearing sleeve 2 is prevented from falling out of the shell 1 during operation of the bearing 3.

The bearing sleeve 2 can be made of various materials, the bearing sleeve 2 can be made of aluminum or steel, and the application is not limited to this, in one embodiment of the application, the bearing sleeve 2 is made of steel, on one hand, the wear resistance of the steel is good, and the bearing sleeve 2 is made of steel, so that the wear between the bearing sleeve 2 and the bearing can be effectively reduced. On the other hand, the motor housing 1 is made of steel, and the bearing sleeve 2 and the bearing cavity 11 have similar thermal expansion coefficients, so that the size of a gap generated after the bearing sleeve 2 and the bearing cavity 11 are heated is reduced, and the possibility of relative rotation between the bearing sleeve 2 and the bearing cavity 11 is further reduced.

Referring to fig. 4, along the circumferential direction of the first flange 21, a plurality of flat structures 23 are disposed on the side of the first flange 21 facing the bearing cavity 11, the flat structures 23 can form a gap between the bearing sleeve 2 and the housing 1, and when the housing 1 is molded by casting, casting solution can flow downwards through the gap to mold the housing 1 outside the bearing sleeve 2, and after the housing 1 is molded, the flat structures 23 remained in the housing 1 can abut against the housing 1 to prevent the bearing sleeve 2 from rotating along the circumferential direction, thereby improving the connection stability of the bearing sleeve 2 and the housing 1.

Referring to fig. 4, in an embodiment of the present application, a second flange 22 is further disposed on a side of the bearing housing 2 facing the bearing cavity 11, the first flange 21 is disposed at one end of the bearing housing 2 along the axial direction of the bearing housing 2, and the second flange 22 is disposed at the other end of the bearing housing 2 along the axial direction of the bearing housing 2, so that both ends of the bearing housing 2 along the axial direction of the bearing housing 2 can contact with the housing 1, increasing the contact area between the bearing housing 2 and the housing 1, and further improving the connection stability between the bearing housing 2 and the housing 1. It will be appreciated that the number of flanges on the bearing housing 2 may be greater, the application is not limited to the number of flanges on the bearing housing 2,

The casing 1 is aluminum alloy structure, and the wearability is relatively poor, and bearing housing 2 wearability is better, and bearing housing 2 is close to the one end of bearing chamber 11 bottom, is formed with the step 24 that extends to bearing housing 2 inside, and the one end butt of bearing 3 in step 24, so, avoided bearing 3 and bearing chamber 11 direct contact, and make casing 1 take place wearing and tearing.

In order to reduce the frequency of relative rotation between the bearing 3 and the bearing housing 2 during operation, please refer to fig. 1, 2 and 4, in an embodiment of the present application, the inner cavity surface of the bearing housing 2 is provided with a sealing groove 25, the housing assembly 1000 further includes a sealing ring 6, the sealing ring 6 is disposed in the sealing groove 25, the bearing 3 is disposed through the sealing ring 6 and is in interference fit with the sealing ring 6, so as to increase the friction between the bearing and the bearing housing 2, reduce the frequency of relative rotation between the bearing 3 and the bearing housing 2, reduce the possibility of abrasion of the bearing 3, and meanwhile, the sealing ring 6 can also provide a buffer for the bearing 3 and the bearing housing 2, thereby reducing the impact force of the bearing 3 to the bearing housing 2 during operation, avoiding damage to the bearing 3 and reducing the risk of abnormal sound of the bearing 3.

It should be noted that, in the above embodiment, the sealing ring 6 may be made of any elastic material including rubber and resin, which is not limited in the present application, and the friction coefficient of the resin material is considered to be larger, so in one embodiment of the present application, the sealing ring 6 is made of resin, so that friction between the sealing ring 6 and the bearing 3 is improved, and at the same time, the resin also has a relatively good elastic force, so that a buffer can be provided for the bearing 3 and the bearing housing 2, and abnormal noise of the bearing 3 is prevented. The number of the seal rings 6 may be one or plural, and is mainly determined by the load-carrying power of the bearing 3, which is not limited in the present application.

Referring to fig. 1, 2 and 5, the housing assembly further includes a pressing plate 4, the pressing plate 4 is connected with the housing 1, and covers an opening of the bearing cavity 11, an avoidance hole 42 is formed in the middle of the pressing plate 4 for the power supply shaft 2000 to pass through, the pressing plate 4 can provide a pretightening force for the bearing 3 and the bearing sleeve 2, so that the bearing sleeve 2 is pressed in the bearing cavity 11, and the bearing 3 is pressed in the bearing sleeve 2, so that the risk of relative rotation between the bearing sleeve 2 and the housing 1 is reduced, the frequency of relative rotation between the bearing 3 and the bearing sleeve 2 is reduced, and abrasion between the bearing 3 and the bearing sleeve 2 is further reduced.

It should be noted that, the pressing plate 4 may be fixedly connected to the housing 1, or may be detachably connected to the housing 1, which is not limited in this aspect of the application, and in an embodiment of the application, the pressing plate 4 is detachably connected to the housing 1, so as to facilitate the subsequent detachment and maintenance of the bearing 3.

The pressing plate 4 may be detachably connected to the housing 1 in various manners, for example, the pressing plate 4 may be detachably connected to the housing 1 by a clamping manner, or may be detachably connected to the housing 1 by a magnetic attraction manner, which is not limited in this aspect of the application. In an embodiment of the present application, the housing 1 is provided with a first connecting hole 12, the pressing plate 4 is provided with a through hole 41, and the housing assembly further includes a fixing member 5, and the fixing member 5 sequentially passes through the through hole 41 of the pressing plate 4 and the first connecting hole 12 of the housing 1, so as to detachably connect the pressing plate 4 to the housing 1. Compared with other detachable modes, the fixing piece 5 is simple in structure and lower in cost, meanwhile, the fixing piece 5 can provide larger pretightening force for the bearing sleeve 2 and the bearing 3, friction force between the bearing 3 and the bearing sleeve 2 is further increased, relative rotation frequency between the bearing 3 and the bearing sleeve 2 is reduced, and abrasion of the bearing 3 is reduced. The fixing member 5 may be a bolt, and the first connection hole 12 may be a screw hole.

It should be noted that, in the above embodiment, the number of the fixing members 5 and the first connecting holes 12 may be two or three, which is not limited in the present application, and in one embodiment of the present application, the number of the fixing members 5 and the first connecting holes 12 is four and uniformly distributed along the circumferential direction of the pressing plate 4, so as to ensure the uniformity of the pretightening force applied by the pressing plate 4 to the bearing 3 and the bearing housing 2.

In order to further reduce the frequency of relative rotation between the bearing 3 and the bearing sleeve 2, in an embodiment of the present application, an adhesive layer is disposed between the bearing sleeve 2 and the bearing, and the adhesive layer can reduce the gap between the bearing and the bearing sleeve 2, improve the friction between the bearing and the bearing sleeve 2, further reduce the frequency of relative rotation between the bearing and the bearing sleeve 2, reduce the wear of the bearing and the bearing sleeve 2, and improve the service life of the bearing and the bearing sleeve 2. The application is not limited by the fact that the bonding layer can be made of liquid adhesive or semi-liquid adhesive, the bonding layer can be made of resin adhesive or rubber adhesive, and the application is not limited by the fact that the bonding layer can be made of rubber adhesive.

The application also provides an electric vehicle, which comprises a driving motor, wherein the driving motor comprises a shell component, the specific structure of the shell component refers to the embodiment, and the electric vehicle adopts all the technical schemes of all the embodiments, so that the electric vehicle at least has all the beneficial effects brought by the technical schemes of the embodiments, and the details are not repeated.

In the description of the embodiments of the present application, it should be noted that, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like refer to the orientation or positional relationship described based on the drawings, which are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

The above disclosure is only a preferred embodiment of the present application, and it should be understood that the scope of the application is not limited thereto, but all or part of the procedures for implementing the above embodiments can be modified by one skilled in the art according to the scope of the appended claims.

Claims

1. A housing assembly, comprising:

A housing formed with a bearing cavity;

And the bearing is arranged in the bearing sleeve.

2. The housing assembly of claim 1, wherein the bearing housing is further provided with a second flange, the first flange being provided at one end of the bearing housing, the second flange being provided at the other end of the bearing housing, the second flange being at least partially fixedly connected to the housing.

3. A housing assembly according to claim 1, wherein a flat structure is provided along a circumferential direction of the first flange on a side of the first flange facing the bearing cavity.

4. The housing assembly of claim 1, wherein an end of the inner wall of the bearing housing adjacent the bottom of the bearing cavity defines a step extending inwardly of the bearing housing, the bearing abutting the step.

5. The housing assembly of claim 1, wherein an inner wall of the bearing housing is provided with a seal groove;

The housing assembly further comprises a sealing ring, and the sealing ring is arranged in the sealing groove.

6. The housing assembly of any one of claims 1-5, further comprising a platen coupled to the housing, the platen covering a cavity opening of the bearing cavity.

7. The housing assembly of claim 6, wherein the pressure plate has a through hole, the housing has a first connecting hole, and the housing assembly further comprises a fixing member, wherein the fixing member is disposed through the through hole and detachably connected to the first connecting hole.

8. A housing assembly according to any one of claims 1-5, wherein an adhesive layer is provided between the inner wall of the bearing housing and the outer wall of the bearing.

9. A drive motor comprising a housing assembly according to any one of claims 1 to 8.

10. An electric vehicle comprising the drive motor of claim 9.