CN211351908U

CN211351908U - Motor discharge structure and motor

Info

Publication number: CN211351908U
Application number: CN201922371888.0U
Authority: CN
Inventors: 华磊; 刘平; 陈兴; 蔡央; 李涛; 潘宁静; 郭雪成
Original assignee: Zhuzhou Gear Co Ltd
Current assignee: Zhuzhou Gear Co Ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-08-25
Anticipated expiration: 2029-12-26

Abstract

The utility model relates to a motor discharge structure and motor, the device includes: a housing; the motor shaft is rotatably connected with the shell through a motor bearing, one end of the motor shaft is positioned in the shell, and the other end of the motor shaft is positioned outside the shell; one side of the conducting layer is tightly attached to one end, located in the shell, of the motor shaft, the other side of the conducting layer is tightly attached to the inner wall of the shell, and the resistance value of the conducting layer is smaller than that of the motor bearing. The above-mentioned scheme that this application provided, because the resistance value of conducting layer is less than the resistance value of motor bearing, the motor is at the pivoted in-process, and the electric charge that produces on the electric motor rotor will flow from the place that resistance is little, and the electric charge that produces flows from motor shaft, conducting layer and casing in proper order promptly to avoided electric charge to flow on the motor bearing, and then avoided the motor bearing to take place electrochemical corrosion.

Description

Motor discharge structure and motor

Technical Field

The utility model relates to the technical field of electric machines, especially, relate to a motor discharge structure and motor.

Background

During the rotation process of the motor, charges can be continuously accumulated on a motor rotor due to three-phase imbalance of the motor, so that common-mode voltage is caused. If the motor rotating shaft is not subjected to discharge protection, electrochemical corrosion of a bearing of the motor shaft can be caused.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a motor discharging structure and a motor, aiming at the problem that electric charges are continuously accumulated on a motor rotor in the rotating process of the motor, and if the rotating shaft of the motor is not subjected to discharge protection, electrochemical corrosion of a bearing of a motor shaft can be caused.

An electric motor discharge structure comprising:

a housing;

the motor shaft is rotatably connected with the shell through a motor bearing, one end of the motor shaft is positioned in the shell, and the other end of the motor shaft is positioned outside the shell;

and one side of the conducting layer is tightly attached to one end, located in the shell, of the motor shaft, the other side of the conducting layer is tightly attached to the inner wall of the shell, and the resistance value of the conducting layer is smaller than that of the motor bearing.

Above-mentioned motor discharge structure, because the resistance value of conducting layer is less than the resistance value of motor bearing, the motor is at the pivoted in-process, and the electric charge that produces on the electric motor rotor will flow from the place that resistance is little, and the electric charge that produces flows from motor shaft, conducting layer and casing in proper order promptly to avoided the electric charge to flow on the motor bearing, and then avoided the motor bearing to take place electrochemical corrosion.

In one embodiment, the conductive layer includes a carbon fiber layer, and one side of the carbon fiber layer is tightly attached to one end of the motor shaft located in the housing, and the other side of the carbon fiber layer is tightly attached to the inner wall of the housing.

In one embodiment, the conductive layer further comprises a conductive sheet located between the carbon fiber layer and the motor shaft.

In one embodiment, a first opening is arranged at one end of the motor shaft, which is located in the housing, and the conducting strip is clamped on the first opening.

In one embodiment, the conductive sheet includes a groove, the groove is matched with the first opening, and the carbon fiber layer is arranged in the groove.

In one embodiment, the recess is an interference fit with the first opening.

In one embodiment, the carbon fiber shell further comprises a gasket, one side of the gasket is tightly attached to the carbon fiber layer, and the other side of the gasket is clamped with a protrusion arranged on the inner wall of the shell.

In one embodiment, a clamping groove is arranged on one side of the gasket, which is close to the protrusion, and the clamping groove is matched with the protrusion.

In one embodiment, the housing has a second opening, and the motor shaft passes through the second opening and is rotatably connected to the housing.

In one embodiment, a first placing groove is arranged on one side of the shell close to the second opening, the first placing groove is communicated with the second opening, and the diameter of the first placing groove is larger than that of the second opening;

a second placing groove is formed in one side, far away from the second opening, of the shell, and the motor bearings are arranged in the first placing groove and the second placing groove;

the motor shaft sequentially penetrates through the second opening, a shaft hole in a motor bearing in the first placing groove and a shaft hole in a motor bearing in the second placing groove and then is rotatably connected with the shell.

The utility model also provides a motor, include: the motor comprises a motor body and a motor discharge structure as described in any one of the embodiments of the present application, wherein the motor discharge structure is arranged on the motor body.

Drawings

Fig. 1 is a schematic view of a discharge structure of a motor according to an embodiment of the present invention;

FIG. 2 is a schematic view of the motor shaft of FIG. 1;

fig. 3 is a schematic diagram of the conductive sheet of fig. 1.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements 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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, in an embodiment of the present invention, a motor discharging structure is provided, including a housing 1, a motor shaft 2 and a conductive layer, wherein, the motor shaft 2 is rotatably connected with the housing 1 through a motor bearing 3, and one end of the motor shaft 2 is located in the housing 1, the other end is located outside the housing 1, one end of the conductive layer located in the housing 1 is tightly attached to one end of the motor shaft 2, the other end is tightly attached to the inner wall of the housing 1, and the resistance value of the conductive layer is smaller than the resistance value of the motor bearing 3.

Specifically, the housing 1 in this embodiment is provided with a second opening 101, a first placing groove 102 is provided in the housing 1 on a side close to the second opening 101, the first placing groove 102 is communicated with the second opening 101, and the diameter of the first placing groove 102 is larger than that of the second opening 101; a second placing groove 103 is arranged on one side, far away from the second opening 101, in the shell 1, and motor bearings 3 are arranged in the first placing groove 102 and the second placing groove 103; the motor shaft 2 passes through the second opening 101, a shaft hole (not shown) of the motor bearing 3 in the first placement groove 102, and a shaft hole (not shown) of the motor bearing 3 in the second placement groove 103 in sequence, and then is rotatably connected to the housing 1.

The conducting layer comprises a carbon fiber layer 5, one side of the carbon fiber layer 5 is tightly attached to one end, located in the shell 1, of the motor shaft 2, and the other side of the carbon fiber layer is tightly attached to the inner wall of the shell 1. When the motor works, the motor rotor generates electric charges, and the electric charges flow to a place with small resistance due to the fact that the resistance value of the carbon fiber layer 5 is smaller than that of the motor bearing 3, so that the electric charges generated on the motor rotor flow out of the motor shaft, the conducting layer and the shell in sequence, the electric charges are prevented from flowing on the motor bearing, and electrochemical corrosion of the motor bearing is avoided.

In some embodiments, in order to enhance the conductivity between the carbon fiber layer 5 and the motor shaft 2, as shown in fig. 1, the present application provides a conductive sheet 4, such as a copper sheet, between the carbon fiber layer 5 and the motor shaft 2, wherein one side of the conductive sheet 4 is closely attached to the carbon fiber layer 5, and the other side is closely attached to one end of the motor shaft 2 located in the housing 1.

Specifically, as shown in fig. 2 and 3, the conductive sheet 4 in the present application includes a groove 401, a first support arm 402, and a second support arm 403, wherein the first support arm 402 and the second support arm 403 are oppositely disposed on both sides of the opening port of the groove 401. One end of motor shaft 2 that is located casing 1 is equipped with first opening 201, and when assembling conducting strip 4 and motor shaft 2, earlier put into first opening 201 with recess 401 on conducting strip 4, press conducting strip 4 again, make conducting strip 4 to keeping away from protruding 104 one side motion, first support arm 402 on conducting strip 4 and the first axial wall 202 butt on the motor shaft 2, second support arm 403 and the second axial wall 203 butt on the motor shaft 2 can. After the conductive sheet 4 and the motor shaft 2 are assembled, the carbon fiber layer 5 is placed in the groove 401.

In some embodiments, the groove 401 in the present application is interference fit with the first opening 201 in order to make the fit of the conductive plate 4 with the motor shaft 2 more secure.

In some embodiments, as shown in fig. 1, a gasket 6 is further included, and one side of the gasket 6 is closely attached to the carbon fiber layer 5, and the other side is clamped with a protrusion 104 arranged on the inner wall of the shell 1.

Specifically, the gasket 6 in this embodiment is provided with a locking groove (not indicated in the figure) on a side close to the protrusion 104, and the locking groove is matched with the protrusion 104.

It should be noted that the above-mentioned connecting structure of the gasket and the protrusion is only an example, and in other alternative schemes, other connecting structures may be adopted, for example, the gasket is connected with the protrusion through a bolt. The present application does not specifically limit the structure for connecting the gasket and the protrusion, as long as the above structure can achieve the object of the present application.

The utility model also provides a motor, include: the motor comprises a motor body and a motor discharge structure as described in any one of the embodiments of the present application, wherein the motor discharge structure is arranged on the motor body. This motor is at the during operation, and electric motor rotor will produce electric charge, because the resistance value of the carbon fiber layer in the motor discharge structure is less than the resistance value of motor bearing, electric charge itself can flow toward the place that resistance is little, consequently, electric charge that produces on the electric motor rotor can flow from motor shaft, conducting layer and casing in proper order to avoided electric charge to flow on the motor bearing, and then avoided the motor bearing to take place electrochemical corrosion, guaranteed the holistic quality of motor.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An electric motor discharge structure, comprising:

a housing (1);

the motor shaft (2) is rotatably connected with the shell (1) through a motor bearing (3), one end of the motor shaft (2) is located in the shell (1), and the other end of the motor shaft is located outside the shell (1);

one side of the conducting layer is tightly attached to one end, located in the shell (1), of the motor shaft (2), the other side of the conducting layer is tightly attached to the inner wall of the shell (1), and the resistance value of the conducting layer is smaller than that of the motor bearing (3).

2. The motor discharge structure according to claim 1, characterized in that the conductive layer comprises a carbon fiber layer (5), and one side of the carbon fiber layer (5) is tightly attached to one end of the motor shaft (2) located in the housing (1) and the other side is tightly attached to the inner wall of the housing (1).

3. The electrical machine discharge structure according to claim 2, characterized in that the electrically conductive layer further comprises an electrically conductive sheet (4), the electrically conductive sheet (4) being located between the carbon fiber layer (5) and the electrical machine shaft (2).

4. The motor discharge structure of claim 3, wherein the motor shaft (2) is provided with a first opening (201) at one end inside the housing (1), and the conductive plate (4) is clamped on the first opening (201).

5. The electric machine discharge structure according to claim 4, characterized in that the conductive sheet (4) comprises a groove (401), the groove (401) having an interference fit with the first opening (201), the carbon fiber layer (5) being arranged within the groove (401).

6. The motor discharge structure according to claim 5, further comprising a gasket (6), wherein one side of the gasket (6) is tightly attached to the carbon fiber layer (5), and the other side of the gasket is clamped with a protrusion (104) arranged on the inner wall of the shell (1).

7. The electric motor discharge structure according to claim 6, characterized in that a clamping groove is arranged on one side of the gasket (6) close to the protrusion (104), and the clamping groove is matched with the protrusion (104).

8. The motor discharge structure according to claim 1, wherein a second opening (101) is formed in the housing (1), and the motor shaft (2) passes through the second opening (101) and is rotatably connected to the housing (1).

9. The motor discharge structure according to claim 8, wherein a first placing groove (102) is provided in the housing (1) on a side close to the second opening (101), the first placing groove (102) communicates with the second opening (101), and a diameter of the first placing groove (102) is larger than a diameter of the second opening (101);

a second placing groove (103) is formed in one side, far away from the second opening (101), of the shell (1), and the motor bearings (3) are arranged in the first placing groove (102) and the second placing groove (103);

the motor shaft (2) sequentially penetrates through the second opening (101), a shaft hole in the motor bearing (3) in the first placing groove (102) and a shaft hole in the motor bearing (3) in the second placing groove (103) and then is rotatably connected with the shell (1).

10. An electric machine, comprising: a motor body and a motor discharge structure according to any one of claims 1 to 9, the motor discharge structure being provided on the motor body.