CN219420441U

CN219420441U - Motor with a motor housing

Info

Publication number: CN219420441U
Application number: CN202320526510.7U
Authority: CN
Inventors: 郝婷; 宋文杰; 郑勇
Original assignee: Jifu Automotive Technology Suzhou Co ltd
Current assignee: Jifu Automotive Technology Suzhou Co ltd
Priority date: 2023-03-17
Filing date: 2023-03-17
Publication date: 2023-07-25
Anticipated expiration: 2033-03-17

Abstract

The utility model discloses a motor, which comprises a motor shaft, a motor shell and a conduction mechanism for conducting the motor shaft and the motor shell and applying elastic acting force along the axial direction to the motor shaft, wherein the conduction mechanism is arranged in an outer shell and is in contact with the motor shaft. According to the motor, the purpose of conducting the motor shaft and the motor shell is achieved by arranging the conducting mechanism, and the risk of electric corrosion of motor parts can be reduced.

Description

Motor with a motor housing

Technical Field

The present utility model relates to an electric motor.

Background

With the development of motor technology, the motor power is larger and the rotating speed is higher, and the problem of motor shaft current also often occurs, and the motor shaft current can generate electric corrosion to a motor bearing, namely a washboard stripe is formed on a bearing raceway, so that the vibration noise of the motor is aggravated, and the performance is reduced.

The current solution of the motor shaft commonly used at present comprises carbon brushes, conductive carbon fibers, bearing conductive oil seals, bearing conductive grease and the like. As disclosed in the patent document with publication number CN105429373a, a carbon brush is provided in the motor, the carbon brush is easy to wear, and the carbon powder after wear may affect the bearing and the motor performance. The motor brush as disclosed in patent document publication No. CN112993704a is made of conductive carbon fiber, which is expensive and has poor conductive effect in the oil-cooled motor. The bearing conductive oil seal and the bearing conductive grease have good effects on smaller shaft current, but the conductive effect is poor along with the increase of the shaft current, and the risk of electric corrosion still exists.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an electric machine with the aim of eliminating the shaft current.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the motor comprises a motor shaft, a motor shell and a conduction mechanism, wherein the conduction mechanism is used for conducting the motor shaft and the motor shell and applying elastic acting force along the axial direction to the motor shaft, and the conduction mechanism is arranged in the outer shell and is in contact with the motor shaft.

The conduction mechanism comprises a shaft sleeve movably arranged in the motor casing, a conduction piece arranged between the shaft sleeve and the motor shaft and an elastic element for applying elastic acting force to the shaft sleeve.

The conductive member is spherical.

The elastic element is a cylindrical spiral spring.

The elastic element is a wave spring.

The motor is characterized in that a positioning shaft is arranged in the motor shell, the shaft sleeve is sleeved on the positioning shaft, and the shaft sleeve and the motor shaft are coaxially arranged.

According to the motor, the purpose of conducting the motor shaft and the motor shell is achieved by arranging the conducting mechanism, and the risk of electric corrosion of motor parts can be reduced.

Drawings

The present specification includes the following drawings, the contents of which are respectively:

fig. 1 is a sectional view of a motor of a first embodiment;

fig. 2 is a sectional view of a motor of a second embodiment;

marked in the figure as: 1. a motor shaft; 2. a conductive member; 3. a shaft sleeve; 4. an elastic element; 5. a first housing; 6. a first bearing; 7. a rotor assembly; 8. a stator assembly; 9. a second housing; 10. a third housing; 11. and a second bearing.

Detailed Description

The following detailed description of the embodiments of the utility model, given by way of example only, is presented in the accompanying drawings to aid in a more complete, accurate and thorough understanding of the concepts and aspects of the utility model, and to aid in its practice, by those skilled in the art.

It should be noted that, in the following embodiments, the "first", "second" and "third" do not represent an absolute distinction between structures and/or functions, and do not represent a sequential order of execution, but are merely for convenience of description.

Example 1

As shown in fig. 1, the present embodiment provides a motor, which includes a motor shaft 1, a rotor assembly 7 disposed on the motor shaft 1, a motor housing, a stator assembly 8 disposed inside the motor housing, and a conduction mechanism for conducting the motor shaft 1 and the motor housing and applying an elastic force along an axial direction to the motor shaft 1, wherein the conduction mechanism is disposed in the outer housing and contacts with the motor shaft 1.

Specifically, as shown in fig. 1, the conduction mechanism includes a boss 3 movably provided in the motor housing, a conduction member 2 provided between the boss 3 and the motor shaft 1, and an elastic member 4 for applying an elastic force to the boss 3. The conducting piece 2 is a spherical steel ball, a circular groove for accommodating the conducting piece 2 is formed in the center of the end face of the motor shaft 1, and a circular groove for accommodating the conducting piece 2 is also formed in the center of the end face of the shaft sleeve 3.

Namely, the connection of the movable part motor shaft 1 and the static part motor shell is realized through the conducting part 2 and the shaft sleeve 3, so that the motor shaft 1 and the motor shell have the same electric potential, and the purpose of eliminating shaft current is achieved.

As shown in fig. 1, the elastic member 4 is a cylindrical coil spring.

As shown in fig. 1, a positioning shaft is arranged in a motor casing, a shaft sleeve 3 and an elastic element 4 are sleeved on the positioning shaft, the shaft sleeve 3, a motor shaft 1 and a conducting piece 2 are coaxially arranged, and the shaft sleeve 3 and the conducting piece 2 can move linearly along the axial direction. The motor casing includes the first casing 5, second casing 9 and the third casing 10 that set gradually, and second casing 9 is located between first casing 5 and the third casing 10 and three fixed connection, and stator assembly fixed mounting is on the interior round surface of second casing 9, and the fixed setting of locating shaft is in the center department of first casing 5, and elastic element 4 presss from both sides between first casing 5 and axle sleeve 3, and motor shaft 1 is installed on first casing 5 and third casing 10 through first bearing 6 and second bearing 11 respectively.

According to the current or the voltage of the motor shaft 1, the contact area between the conducting piece 2 and the motor shaft 1 and between the conducting piece 2 and the shaft sleeve 3 can be changed by adjusting the diameter of the conducting piece 2 and the length of the elastic element 4, so that the on-resistance of the shaft current is reduced.

Example two

As shown in fig. 2, in the present embodiment, the elastic member 4 is a wave spring.

The utility model is described above by way of example with reference to the accompanying drawings. It will be clear that the utility model is not limited to the embodiments described above. As long as various insubstantial improvements are made using the method concepts and technical solutions of the present utility model; or the utility model is not improved, and the conception and the technical scheme are directly applied to other occasions and are all within the protection scope of the utility model.

Claims

1. The motor, including motor shaft and motor casing, its characterized in that: the motor also comprises a conduction mechanism which is used for conducting the motor shaft and the motor shell and applying elastic acting force along the axial direction to the motor shaft, and the conduction mechanism is arranged in the outer shell and is contacted with the motor shaft.

2. The electric machine of claim 1, wherein: the conduction mechanism comprises a shaft sleeve movably arranged in the motor casing, a conduction piece arranged between the shaft sleeve and the motor shaft and an elastic element for applying elastic acting force to the shaft sleeve.

3. The electric machine of claim 2, wherein: the conductive member is spherical.

4. The electric machine of claim 2, wherein: the elastic element is a cylindrical spiral spring.

5. The electric machine of claim 2, wherein: the elastic element is a wave spring.

6. An electric machine as claimed in any one of claims 2 to 5, characterized in that: the motor is characterized in that a positioning shaft is arranged in the motor shell, the shaft sleeve is sleeved on the positioning shaft, and the shaft sleeve and the motor shaft are coaxially arranged.