CN216672770U

CN216672770U - Motor assembly capable of preventing axial impact

Info

Publication number: CN216672770U
Application number: CN202122734342.4U
Authority: CN
Inventors: 温涛; 褚玉林; 任冬冬
Original assignee: Changzhou Maite Motion Co ltd
Current assignee: Changzhou Maite Motion Co ltd
Priority date: 2021-11-05
Filing date: 2021-11-05
Publication date: 2022-06-03
Anticipated expiration: 2031-11-05

Abstract

The utility model relates to the technical field of motors, in particular to an axial impact prevention motor assembly which is provided with a disc spring structure; the axial impact preventing spring structure uses a disc spring and is assembled on the axis of the rotor component; the disk spring utilizes the elastic compression force of the disk spring and the hard support, and the bidirectional axial impact of the rotor assembly is eliminated. The utility model has the characteristics of simple structure, low cost, small occupied space, convenient installation, reliable operation, long service life and the like, and after the spring structure is added, the axial impact of the rotor assembly caused by bearing the axial force is avoided, the abrasion and fatigue failure of related structures and parts caused by the axial impact are avoided, and the impact noise caused by the axial impact is avoided.

Description

Motor assembly capable of preventing axial impact

Technical Field

The utility model relates to the technical field of motors, in particular to an axial impact prevention motor assembly.

Background

When the motor generates axial impact, related mechanisms and parts matched with the motor shaft are excessively abraded and fatigue failure is generated, and impact noise is generated; the service life of a motor bearing is shortened, and the performance of the motor is reduced; the brush motor has poor reversing and increased noise; failure and damage of the mechanism, etc.

The motor for stretching the automobile door pedal works in a state of large axial impact.

Common mechanisms or methods for preventing axial impact of a motor include:

1. and a wave spring is arranged outside the front bearing and the rear bearing (or one of the front bearing and the rear bearing). The method can bear impact load and has limited service life, and the wave spring is easy to break, damage the bearing and generate noise.

2. One end of the shaft is provided with a top shaft such as a steel ball or a wave ball screw. The method has higher requirements on the size, the position precision and the process of the part, the part is abraded, the rotating speed of the motor is reduced, and the service life is short.

3. And fixing the shaft and the bearing and fixing the bearing and the bearing chamber by using a mode of gluing or riveting and punching a retainer ring. The method has the advantages of poor manufacturability, high requirement on the one-time qualified rate of products and poor economical efficiency.

4. The bearing and the bearing chamber are relatively fixed by a check ring, a compression spring and a gland. The method has high cost and poor manufacturability.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide the axial impact resistant motor assembly which is stable in performance, long in service life, simple in structure and low in cost.

The technical scheme for realizing the purpose of the utility model is as follows: an anti-axial impact motor assembly having a rotor assembly; a front bearing and a lower retainer ring are arranged in the front and back of a front bearing chamber of the rotor assembly, and a rear bearing is arranged in a rear bearing chamber; a disc spring structure is arranged on a motor shaft of the rotor assembly; the belleville spring structure is assembled on the axis of the rotor assembly.

According to the technical scheme, the disc spring structure is arranged between the front bearing and the lower retainer ring.

According to the technical scheme, the disc spring structure is arranged on the front side of the front bearing.

In the technical scheme, the front end of a front bearing on the motor shaft is provided with an upper retainer ring; the disc spring structure is arranged between the upper retainer ring and the front bearing.

In the technical scheme, a flat gasket is arranged in the rear bearing chamber; one side of the flat gasket is contacted with the outer ring of the rear bearing, and the other side of the flat gasket is contacted with the motor shell.

According to the technical scheme, the disc spring structure is arranged in the rear bearing chamber and is positioned between the rear bearing and the motor shell.

According to the technical scheme, another group of disc spring structures with axes coincident with the axis of the motor shaft are arranged on the front side of the front bearing or between the front bearing and the lower retainer ring.

According to the technical scheme, the disc spring structure is a single disc spring or two disc springs which are buckled together and arranged in a flying disc shape.

According to the technical scheme, the disc spring structure is formed by a plurality of disc springs which are coaxially arranged, and two adjacent disc springs are arranged in a mirror image mode.

The disc spring structure in the technical scheme is composed of a single disc spring and a baffle plate; the horn opening of the single disc spring is arranged close to the baffle plate.

After the technical scheme is adopted, the utility model has the following positive effects:

(1) the utility model has the characteristics of stable performance, long service life, simple structure, low cost, good manufacturability and the like, effectively overcomes the axial impact born by the motor rotor, avoids excessive wear and fatigue failure of related mechanisms and parts, eliminates impact noise, improves the performance of the motor, and prolongs the service life of the motor.

(2) The utility model is suitable for the direct current brush motor for the extension of the automobile door pedal, and can also be used for motors of other working conditions and other types which require control on the axial impact.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic structural view of embodiment 1 of the present invention;

FIG. 4 is a schematic structural view of embodiment 2 of the present invention;

FIG. 5 is a schematic structural diagram of embodiment 3 of the present invention;

FIG. 6 is a schematic structural view of embodiment 4 of the present invention;

FIG. 7 is a schematic structural view of example 5 of the present invention;

fig. 8 is a schematic structural diagram of embodiment 6 of the present invention.

FIG. 9 is a schematic structural view of example 7 of the present invention;

fig. 10 is a schematic structural diagram of embodiment 8 of the present invention.

Detailed Description

Example 1

Referring to fig. 1 to 3, the present invention has a rotor assembly; a front bearing 3 and a lower retainer ring 5 are arranged in the front and the back of a front bearing chamber of the rotor component, and a back bearing 7 is arranged in a back bearing chamber; a disc spring structure 4 is arranged on a motor shaft of the rotor assembly; the belleville spring structure 4 is mounted on the axis of the rotor assembly.

Taking a motor for stretching and retracting a car door pedal as an example, the motor comprises a motor component and a gear box 2; the gear box 2 is internally provided with an accommodating cavity; a worm end of a motor shaft 1 in the motor assembly extends into the accommodating cavity to be in meshing transmission with a turbine in the gear box 2, a front bearing chamber is arranged at a junction position corresponding to a motor shell 6 and the gear box 2, a front bearing 3 and a lower retainer ring 5 are arranged on the motor shaft 1 in the front bearing chamber in a front-back mode, and a rear bearing 7 is arranged in a rear bearing chamber, which is positioned at a non-worm-rod end of the motor shaft 1, in the motor shell 6; disc spring structure 4 is installed between front bearing 3 and lower retainer ring 5, and this disc spring structure 4 is the disc spring that two lock-joints are set up together and are the flying saucer shape.

A flat gasket 8 is arranged in the rear bearing 7 chamber; one side of the flat gasket 8 is contacted with the outer ring of the rear bearing 7, and the other side is contacted with the motor shell 6. The flat gasket 8 may not be provided according to actual requirements.

The belleville spring structure 4 is compressed to eliminate the axial stack up tolerances of the motor shaft 1 and to provide axial preload to the front and

rear bearings

3 and 7. When the rotor is subjected to upward axial impact force, the disc spring structure 4 generates small deformation because the elasticity of the disc spring structure 4 is far larger than the axial impact force, and the impact force is overcome. When the rotor is subjected to downward axial impact force, the rotor cannot move axially because the rear bearing 7, the flat gasket 8 and the housing bearing chamber are hard supports. The impact force in both directions is then overcome.

Example 2

Referring to fig. 4, this embodiment is substantially the same as embodiment 1 except that: two disc spring 4 have become a slice disc spring, and principle and function are the same, according to actual demand, can increase separation blade 10, and this separation blade 10 setting is hugged closely to disc spring's loudspeaker opening.

Example 3

Referring to fig. 5, in this embodiment, compared with embodiment 1, an upper retainer 9 is added, and two engaged disk springs 3 are placed between the upper retainer 9 and the front bearing 3. When the rotor is subjected to downward axial impact force, the disc spring generates small deformation because the elasticity of the disc spring structure 4 is far larger than the axial impact force, and the impact force is overcome. When the rotor is subjected to upward axial impact force, the rotor cannot axially move because the lower retainer ring 5, the front bearing 3 and the bearing chamber of the gear box 2 are hard supports, and thus the impact force in two directions is overcome.

Example 4

Referring to fig. 6, the present embodiment is different from embodiment 3 in that: two belleville springs have become a slice belleville spring, and principle and function are the same, according to actual demand, can increase separation blade 10, and this separation blade 10 setting is hugged closely to belleville spring's loudspeaker opening, if belleville spring opening retaining ring 9 up, then need increase separation blade 10.

Example 5

Referring to fig. 7, in this embodiment, compared with embodiment 2, the disc spring structure 4 is located at the bottom of the rear bearing 6. When the rotor is subjected to downward axial impact force, the disc spring generates small deformation because the elasticity of the disc spring structure 4 is far larger than the axial impact force, and the impact force is overcome. When the rotor is subjected to upward axial impact force, the rotor cannot move axially because the lower retainer ring 5, the front bearing 3 and the bearing chamber of the gear box 2 are hard supports. The impact forces in both directions are then overcome and the disc spring arrangement 4 may be a single disc spring in this embodiment.

Example 6

Referring to fig. 8, compared with embodiment 5, the present embodiment only has the reversed disc spring, and the bell mouth faces to the rear bearing 6, and the principle and function are the same.

Example 7

Referring to fig. 9, the present embodiment has a motor shaft 1, a gear box 2, an upper disc spring, a front bearing 3, a lower retainer ring 5, a motor housing 6, a rear bearing 7, and a lower disc spring. In the embodiment, two disc springs are arranged on the outer sides of the front bearing 3 and the rear bearing 7, and are similar to the arrangement of a wave spring, generally, an upper disc spring is arranged on the front side of the front bearing 3, and a lower disc spring is arranged between the rear bearing 7 and the motor shell 6. The difference from the wave spring is that the disc spring has larger elasticity (elastic modulus) and fatigue strength, can bear larger impact force and has longer service life. The upper belleville springs act when the rotor is subjected to an upward axial impact force and the lower belleville springs act when the rotor is subjected to a downward axial impact force. Because the elasticity of the disc spring is far larger than the axial impact force, the disc spring generates small deformation, and the impact force in two directions is overcome.

Example 8

Referring to fig. 10, in this embodiment, the lower disc spring is changed to a flat washer as compared with embodiment 7. The hard support is active when the rotor is subjected to a downward axial impact force.

In practical use, the disc spring structure 4 is not limited to the cases of the above embodiments 1 to 8, and according to practical situations, the disc springs are arranged coaxially, and two adjacent disc springs are arranged in a mirror image manner.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-axial impact motor assembly having a rotor assembly; a front bearing and a lower retainer ring are arranged in the front and back of a front bearing chamber of the rotor assembly, and a rear bearing is arranged in a rear bearing chamber; the method is characterized in that: a disc spring structure is arranged on a motor shaft of the rotor assembly; the belleville spring structure is assembled on the axis of the rotor assembly.

2. The axial-shock resistant motor assembly of claim 1, wherein: the disc spring structure is arranged between the front bearing and the lower retainer ring.

3. The anti-axial-shock motor assembly of claim 1, wherein: the belleville spring structure is mounted to a front side of the front bearing.

4. The anti-axial-shock motor assembly of claim 3, wherein: an upper retainer ring is arranged at the front end of a front bearing on the motor shaft; the disc spring structure is arranged between the upper retainer ring and the front bearing.

5. The anti-axial-shock motor assembly according to claim 2, 3 or 4, wherein: a flat gasket is arranged in the rear bearing chamber; one side of the flat gasket is contacted with the outer ring of the rear bearing, and the other side of the flat gasket is contacted with the motor shell.

6. The anti-axial-shock motor assembly of claim 1, wherein: the disc spring structure is arranged in the rear bearing chamber and is positioned between the rear bearing and the motor shell.

7. The anti-axial-shock motor assembly of claim 6, wherein: and another group of disc spring structures with the axes coincident with the axis of the motor shaft are arranged on the front side of the front bearing or between the front bearing and the lower retainer ring.

8. An axial impact protected electric motor assembly as claimed in claim 2 or 3 or 4 or 6 or 7, wherein: the structure of the disc spring is a single disc spring or two disc springs which are buckled together and arranged in a flying disc shape.

9. An axial impact protected electric motor assembly as claimed in claim 2 or 3 or 4 or 6 or 7, wherein: the structure of the disc spring is a plurality of disc springs which are coaxially arranged, and two adjacent disc springs are arranged in a mirror image mode.

10. An axial impact protected electric motor assembly as claimed in claim 2 or 3 or 4 or 6 or 7, wherein: the disc spring structure consists of a single disc spring and a baffle plate; the horn opening of the single disc spring is arranged close to the baffle plate.