CN216721104U

CN216721104U - Motor and car

Info

Publication number: CN216721104U
Application number: CN202220269179.0U
Authority: CN
Inventors: 马金金; 李志华; 付家栋
Original assignee: Chongqing Jinkang Power New Energy Co Ltd
Current assignee: Chongqing Jinkang Power New Energy Co Ltd
Priority date: 2022-02-10
Filing date: 2022-02-10
Publication date: 2022-06-10
Anticipated expiration: 2032-02-10

Abstract

The utility model relates to a motor and car, the motor includes the casing, the motor shaft, electrically conductive parts, adapting unit and seal part, the motor shaft is connected with the casing, and be provided with the installation cavity, adapting unit and seal part all are located the installation cavity, it holds the chamber to form between the inner wall of installation cavity and adapting unit and the seal part, it is provided with the conducting agent to hold the intracavity, at least part of electrically conductive parts one end can pass adapting unit and conducting agent contact, the other end is connected with the casing, the electric charge that the motor shaft was taken can be through conducting agent and electrically conductive parts conduction to the casing, and then reduce the influence of shaft current to the motor.

Description

Motor and car

Technical Field

The application relates to the technical field of motor systems, in particular to a motor and an automobile.

Background

In the working process of the motor, shaft current can be generated in the main shaft of the motor, and the shaft current generates small arc erosion between the shaft neck and the bearing bush to damage an oil film, so that the temperature of the bearing is increased, and lubricating oil is carbonized and deteriorated. The problem of shaft current guide to motor housing through set up conductive bearing and leading electrical pillar at the main shaft among the prior art, however, conductive bearing's manufacturing cost is higher, and is higher to installation space's structure and size requirement.

SUMMERY OF THE UTILITY MODEL

The application provides a motor and an automobile, which are used for solving the problem that the production cost of the motor is high.

An embodiment of the present application provides a motor, the motor includes:

a housing;

the motor shaft is connected with the shell and is provided with an installation cavity;

an electrically conductive member connected with the motor shaft;

the connecting part is positioned in the mounting cavity, and the conductive part is connected with the motor shaft through the connecting part;

a sealing member located in the mounting cavity;

an accommodating cavity is formed among the sealing part, the inner wall of the mounting cavity, the connecting part and the conductive part, a conductive agent is arranged in the accommodating cavity, one end of the conductive part is connected with the shell, and at least part of the other end of the conductive part can penetrate through the connecting part to be in contact with the conductive agent so as to conduct charges carried by the motor shaft.

In one possible embodiment, the conductive member includes a first main body portion and a second main body portion, the first main body portion is connected to the second main body portion along an axial direction of the motor, an end of the first main body portion, which is away from the second main body portion, is capable of passing through the connection member and contacting the conductive agent, and an end of the second main body portion, which is away from the first main body portion, is connected to the housing.

In one possible embodiment, the electric machine includes an end cap connected to the housing;

one end of the second main body part, which is far away from the first main body part, is connected with the end cover.

In one possible embodiment, the second main body part comprises a bent section, and the bent section extends along the radial direction of the motor.

In a possible embodiment, the first body part is provided with a mounting slot into which at least a part of the second body part can extend.

In a possible embodiment, the cross section of the mounting groove and the cross section of the end of the second main body part extending into the mounting groove are both rectangular.

In one possible embodiment, the connecting part and the sealing part are fitted with interference with the installation cavity.

In one possible embodiment, the connecting member is a non-conductive bearing.

In one possible embodiment, the connecting member and the sealing member are arranged at a distance from each other in the axial direction of the electric machine.

The embodiment of the application further provides an automobile which comprises the motor, and the motor is any one of the motors.

The embodiment of the application provides a motor and car, the motor includes the casing, the motor shaft, electrically conductive parts, adapting unit and seal part, the motor shaft is connected with the casing, and be provided with the installation cavity, adapting unit and seal part all are located the installation cavity, it holds the chamber to form between the inner wall of installation cavity and adapting unit and the seal part, it is provided with the conducting agent to hold the intracavity, at least part of electrically conductive parts one end can pass adapting unit and conducting agent contact, the other end is connected with the casing, the electric charge that the motor shaft was taken can be conducted to the casing through conducting agent and electrically conductive parts, and then reduce the influence of shaft current to the motor.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

Fig. 1 is a cross-sectional view of an electric machine provided in an embodiment of the present application;

FIG. 2 is an enlarged view of a portion of FIG. 1 at location I;

FIG. 3 is a schematic structural diagram of a conductive component provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of an end cap and a second main body portion according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a connecting member and a first main body portion according to an embodiment of the present application.

Reference numerals:

1-a shell;

2-motor shaft;

21-mounting a cavity;

3-a conductive member;

31-a first body portion;

311-mounting grooves;

32-a second body portion;

321-a bending section;

4-a connecting member;

5-a sealing member;

6-an accommodating cavity;

7-end cap.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Detailed Description

In order to better understand the technical solution of the present application, the following detailed description is made with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.

In the working process of the motor, due to the reasons that the air gap between a stator and a rotor is not uniform, the center of a shaft is not consistent with the center of a magnetic field and the like because of the combination seam of a stator core and the seam of a stator silicon steel sheet in the motor, the motor shaft 2 inevitably rotates in an incompletely symmetrical magnetic field, and an alternating voltage is generated at two ends of the motor shaft 2, so that shaft current is generated in the motor shaft 2, small electric arc erosion is generated between a shaft neck and a bearing bush, an oil film is damaged, the temperature of a bearing is increased, lubricating oil is carbonized and deteriorated, and the like; if the shaft current exceeds a certain value, the sliding surfaces of the journal and the bearing shell may be damaged, and the bearing may be unusable or may have a significantly shortened life.

As shown in fig. 1 and 2, the embodiment of the present application provides a motor, which includes a housing 1, a motor shaft 2, a conductive member 3, a connecting member 4, and a sealing member 5, wherein a mounting cavity 21 is provided in the motor shaft 2 and connected to the housing 1, the connecting member 4 and the sealing member 5 are located in the mounting cavity 21, and the conductive member 3 is connected to the motor shaft 2 through the connecting member 4. Wherein, an accommodating cavity 6 is formed between the sealing part 5 and the inner wall of the mounting cavity 21, the connecting part 4 and the conductive part 3, a conductive agent is arranged in the accommodating cavity 6, one end of the conductive part 3 is connected with the shell 1, and at least part of the other end can penetrate through the connecting part 4 to be contacted with the conductive agent. The shaft current in the motor shaft 2 can be conducted to the conductive member 3 through the conductive agent, and further conducted to the housing 1 due to the connection of the conductive member 3 with the housing 1.

Compare in prior art, through conductive bearing with axle current conduction to casing 1, set up the conducting agent in holding chamber 6, can conduct axle current to electrically conductive part 3, then conduct to casing 1, can not adopt conductive bearing, be favorable to reducing the manufacturing cost of motor.

As shown in fig. 1, 2 and 3, in one possible embodiment, the conductive member 3 includes a first main body portion 31 and a second main body portion 32, the first main body portion 31 and the second main body portion 32 are connected along the axial direction of the motor, an end of the first main body portion 31 away from the second main body portion 32 can pass through the connecting member 4 to contact the conductive agent, and an end of the second main body portion 32 away from the first main body portion 31 is connected to the housing 1.

Because the conductive part 3 is positioned in the shell 1 of the motor, the conductive part 3 is arranged into the first main body part 31 and the second main body part 32, the first main body part 31 and the second main body part 32 can be connected with the shell 1 and the connecting part 4 respectively and then the first main body part 31 and the second main body part 32 are connected, so that the process of mounting the motor is more convenient.

In one possible embodiment, as shown in fig. 1 and 4, the motor comprises an end cap 7, the end cap 7 being connected to the housing 1. The end of the second body portion 32 remote from the first body portion 31 is connected to the end cap 7.

The end cover 7 and the housing 1 and the second main body part 32 and the end cover 7 can be connected through screws, so that the risk that the second main body part 32 is separated from the housing 1 can be reduced, and the possibility of interruption of the shaft current in the process of being transmitted out of the motor shaft 2 is further reduced.

As shown in fig. 3 and 4, in one possible embodiment, the second main body portion 32 includes a bent section 321 extending in a radial direction of the motor.

The first main body part 31 and the second main body part 32 are connected in the axial direction of the motor, and the bent section 321 is provided to facilitate the installation of the second main body part 32 on the end cover 7.

As shown in fig. 3 and 5, in one possible embodiment, the first body portion 31 is provided with a mounting groove 311, and at least a portion of the second body portion 32 can extend into the mounting groove 311.

One end of the second main body part 32 is connected with the end cover 7, and the other end extends into the mounting groove 311, so that the first main body part 31 is connected with the second main body part 32, and the possibility that the first main body part 31 is separated from the second main body part 32 is reduced in the working process of the motor.

As shown in fig. 3, in one possible embodiment, the section of the mounting groove 311 and the section of the second body portion 32 are both rectangular.

The second main body part 32 is mounted on the end cover 7, the end cover 7 is connected with the shell 1 through screws and cannot move relative to the shell 1, and then the second main body part 32 cannot move relative to the shell 1, but the motor shaft 2 rotates relative to the shell 1, the connecting part 4 is a bearing, so that the first main body part 31 cannot rotate along with the motor shaft 2, the cross section of the mounting groove 311 and the cross section of the second main body part 32 are both rectangular, the possibility of rotation of the first main body part 31 relative to the shell 1 can be reduced, and the stability during current transmission is improved.

In one possible embodiment, as shown in fig. 1, the connecting part 4 and the sealing part 5 are in an interference fit with the mounting cavity 21.

The conductive agent is arranged in the containing cavity 6 formed by the inner walls of the connecting part 4, the sealing part 5 and the mounting cavity 21, the possibility of leakage of the conductive agent can be reduced due to interference fit between the connecting part 4, the sealing part 5 and the mounting cavity 21, and the service life of the motor is prolonged.

In a possible embodiment, the connecting member 4 is a non-conductive bearing.

Compared with the prior art in which a conductive bearing is adopted, the connecting part 4 adopts a non-conductive bearing, so that the production cost of the motor can be reduced.

In one possible embodiment, the coupling member 4 and the sealing member 5 are spaced apart in the axial direction of the motor, as shown in fig. 1 and 2.

The current on the motor shaft 2 is conducted to the conductive part 3 through the conductive agent in the accommodating cavity 6 and then conducted to the shell 1, so that the influence of the shaft current on the motor is reduced, and the conductive agent can be in contact with the motor shaft 2 by a distance between the connecting part 4 and the sealing part 5 to complete the current conduction.

If adopt the cold mode of oil to cool off the motor, need be provided with the cavity of depositing the coolant liquid in the inside of motor shaft 2, at this moment, sealing member 5 not only can be used for storing the conducting agent, can also reduce the risk that the coolant liquid flows into the conducting agent. If the motor adopts other cooling methods, need not set up the cavity that holds the coolant liquid in motor shaft 2 inside, also can not need seal part 5, directly with the conducting agent injection adapting unit 4 and the installation cavity 21 inner wall between the chamber 6 that holds that forms in, also can reduce the possibility that the conducting agent revealed.

The embodiment of the application provides an automobile, can be new energy automobile, including above-mentioned any the motor, its technical effect is unanimous with the technical effect of above-mentioned motor, does not do here and does not describe repeatedly.

The embodiment of the application provides a motor and car, the motor includes casing 1, motor shaft 2, conducting part 3, adapting unit 4 and sealing member 5, motor shaft 2 is connected with casing 1, and be provided with installation cavity 21, adapting unit 4 all is located installation cavity 21 with sealing member 5, form between the inner wall of installation cavity 21 and adapting unit 4 and the sealing member 5 and hold chamber 6, it is provided with the conducting agent in the chamber 6 to hold, at least part of conducting part 3 one end can pass adapting unit 4 and contact with the conducting agent, the other end is connected with casing 1, the electric charge that motor shaft 2 was taken can be conducted to casing 1 through conducting agent and conducting part 3, and then reduce the influence of shaft current to the motor.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electric machine, characterized in that the electric machine comprises:

a housing (1);

the motor shaft (2), the motor shaft (2) is connected with the shell (1), and is provided with a mounting cavity (21);

an electrically conductive part (3), the electrically conductive part (3) being connected to the motor shaft (2);

a connecting part (4), wherein the connecting part (4) is positioned in the mounting cavity (21), and the conductive part (3) is connected with the motor shaft (2) through the connecting part (4);

a sealing member (5), the sealing member (5) being located in the mounting cavity (21);

an accommodating cavity (6) is formed among the sealing part (5), the inner wall of the mounting cavity (21), the connecting part (4) and the conductive part (3), a conductive agent is arranged in the accommodating cavity (6), one end of the conductive part (3) is connected with the shell (1), and at least part of the other end of the conductive part can penetrate through the connecting part (4) to be in contact with the conductive agent so as to conduct charges carried by the motor shaft (2).

2. The electric machine according to claim 1, characterized in that the conductive member (3) comprises a first body portion (31) and a second body portion (32), the first body portion (31) is connected with the second body portion (32) along the axial direction of the electric machine, one end of the first body portion (31) away from the second body portion (32) can pass through the connecting member (4) to be in contact with the conductive agent, and one end of the second body portion (32) away from the first body portion (31) is connected with the housing (1).

3. The machine according to claim 2, characterized in that it comprises an end cap (7), said end cap (7) being connected with said casing (1);

one end, far away from the first main body part (31), of the second main body part (32) is connected with the end cover (7).

4. The electric machine according to claim 3, characterized in that the second main body part (32) comprises a bent section (321), the bent section (321) extending in a radial direction of the electric machine.

5. An electric machine according to claim 4, characterized in that the first body part (31) is provided with a mounting slot (311), at least part of the second body part (32) being able to extend into the mounting slot (311).

6. The motor according to claim 5, wherein the section of the mounting groove (311) and the section of one end of the second main body part (32) extending into the mounting groove (311) are both rectangular.

7. The machine according to claim 1, characterized in that the connection member (4) and the sealing member (5) are interference fitted with the mounting cavity (21).

8. The machine according to any of claims 1 to 7, characterized in that the connecting member (4) is a non-conductive bearing.

9. An electric machine according to claim 8, characterized in that the connecting part (4) and the sealing part (5) are arranged at a distance in the axial direction of the electric machine.

10. A motor vehicle, characterized in that it comprises an electric machine according to any one of claims 1 to 9.