CN213367533U

CN213367533U - Axial positioning structure of motor rotor

Info

Publication number: CN213367533U
Application number: CN202022550726.6U
Authority: CN
Inventors: 周银
Original assignee: Ningbo Richen Electrical Appliance Co Ltd
Current assignee: Ningbo Richen Electrical Appliance Co Ltd
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-06-04
Anticipated expiration: 2030-11-06

Abstract

The utility model discloses an axial positioning structure of a motor rotor, which comprises a motor rotor, a motor shaft and a bearing; the bearing is in matched sleeve joint with the motor shaft; and a bulge is arranged between the end surfaces of the motor rotor opposite to the bearing. The utility model discloses the structure is used for behind the motor, through set up protruding structure between bearing end face and electric motor rotor terminal surface for electric motor rotor is the friction of line contact or point contact with the friction of bearing end face when the axial float, reduces area of contact, thereby reduces electric motor rotor axial float's frictional noise and wearing and tearing, not only makes the motor move quietly more, and is more friendly to the user, has prolonged the life of motor moreover.

Description

Axial positioning structure of motor rotor

Technical Field

The utility model relates to the technical field of electric machines, concretely relates to electric motor rotor and its support bearing's axial positioning structure.

Background

The motor is widely applied to social production as a power device for converting electric energy into mechanical energy. The permanent magnet motor mainly utilizes an electrified coil (namely a stator winding) to generate a rotating magnetic field and acts on a rotor (an armature core) to form magnetoelectric power rotating torque. The performance of the motor rotor directly influences the overall performance of the motor.

At present a lot of electric motor rotor and motor shaft are fixed as an organic whole, but at present because reasons such as rotor subassembly and load gravity itself or installation accuracy, the motor operation in-process, axial float can take place for the rotor, and then the rotor takes place the friction with the terminal surface of bearing, causes the motor to shake the increase, the wearing and tearing aggravation, the very big noise of bringing moreover.

Some motor structures now solve this problem by adding wear-resistant pads between the rotor and the bearing, as shown in fig. 1 and fig. 2, but because the rotor is between the rotor end face and the wear-resistant pads, and between the wear-resistant pads and the bearing end face are the contact friction between faces, the contact area is large, the abrasion is large, and the noise is also large.

When such loud motors are used in home appliances, especially at night breaks, these noises can be annoying to some users who are sensitive to sound.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome background art's technical defect, provide an electric motor rotor axial positioning structure. The utility model discloses the structure is used for behind the motor, through set up protruding structure between bearing end face and electric motor rotor terminal surface for be line contact or point contact between electric motor rotor terminal surface and the bearing end face, reduce area of contact, thereby reduce noise and wearing and tearing by a wide margin, simple structure, simple to operate are applicable to most electric motor rotor's axial positioning structure.

The utility model provides an above-mentioned technical problem adopted technical scheme as follows:

an axial positioning structure of a motor rotor comprises the motor rotor, a motor shaft and a bearing; the motor rotor is connected with the motor shaft in a matching way; the bearing is in matched sleeve joint with the motor shaft; the motor rotor and the end face opposite to the bearing are provided with the protrusions, so that the contact between the motor rotor and the end face opposite to the bearing is changed from surface contact to line contact or point contact, the contact area is reduced, and the noise and the abrasion are reduced.

Furthermore, the number of the bearings is two, and the two bearings are respectively arranged on two sides of the motor rotor; the two ends of the motor shaft are matched with the bearings; the protrusion is arranged on the bearing to form a bearing convex ring.

Further, the bearing convex ring is arranged on the end surface of at least one bearing facing the motor rotor.

Further, the motor rotor is fixed with the motor shaft as a whole.

Further, there may be misalignment between the motor shaft and the bearing bore due to installation and manufacturing tolerances, at least one of the bearings being a spherical bearing, such that the motor shaft and the bearing may be self-concentric.

Further, in order to adjust the axial clearance between the motor rotor and the bearings and to reduce friction, a wear pad is provided between the motor rotor and at least one of the bearings.

Further, the bulges are arranged on one side or two sides of the wear-resistant gasket to form a wear-resistant gasket convex ring.

Further, the protrusion is arranged on the motor rotor to form a rotor convex ring.

Further, at least one end face of the motor rotor is provided with the rotor convex ring, so that line contact is realized between the bearing end face and the wear-resistant gasket and between the wear-resistant gasket and the motor rotor end face.

It should be noted that the above point contact and line contact refer to point contact and line contact with a surface in theoretical design, but due to the elasticity of the material used for the wear pad and the like, the point or line and/or surface may be deformed due to deformation, so that in fact a point or line with a small area makes contact with a surface, rather than a point or line with no area in theory. So that the area is less than or equal to 1mm²Can be regarded as point-to-surface contact, and the area-to-surface contact of a line width of 0.5mm or less can be regarded as line-to-surface contact.

The basic principle of the utility model is as follows:

the utility model discloses the during operation, electric motor rotor is high-speed rotatory under the effect of excitation, wear-resisting gasket is in under electric motor rotor's friction action, wear-resisting gasket also can follow electric motor rotor is rotatory together (wear-resisting gasket's rotation has several rates nature), thereby wear-resisting gasket with also can have the friction between the bearing.

Because the end face of the bearing is provided with the bearing convex ring, the line contact friction is formed between the end face of the bearing and the wear-resistant gasket, the contact area is greatly reduced, and the friction noise and the abrasion between the wear-resistant gasket and the bearing are reduced. Similarly, the motor rotor and the wear-resistant gasket are in line contact friction, and noise and wear are reduced.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides an electric motor rotor axial positioning structure, through bearing end face with set up protruding structure between the electric motor rotor terminal surface for be line contact or point contact between electric motor rotor terminal surface and the bearing end face, reduce area of contact, thereby noise reduction and wearing and tearing make the motor move quietly more, and is more friendly to the user, has prolonged the life of motor moreover.

Drawings

FIG. 1 is a schematic view of a half-section structure of an axial positioning structure of a motor rotor in the prior art;

FIG. 2 is a partially enlarged view of a portion A of an axial positioning structure of a motor rotor in the prior art;

fig. 3 is a schematic view of a half-section structure of an axial positioning structure of a motor rotor in embodiment 1 of the present invention;

fig. 4 is a partially enlarged schematic view of a part B of the axial positioning structure of the motor rotor according to embodiment 1 of the present invention;

fig. 5 is an exploded schematic view of an axial positioning structure of a motor rotor according to embodiment 1 of the present invention;

fig. 6 is an enlarged schematic view of a bearing according to embodiment 1 of the present invention;

fig. 7 is a schematic view of a half-section structure of an axial positioning structure of a motor rotor in embodiment 2 of the present invention;

fig. 8 is a partially enlarged schematic view of a part C of an axial positioning structure of a motor rotor according to embodiment 2 of the present invention.

The corresponding part names for the various reference numbers in the figures are:

1-a motor rotor; 11-rotor convex ring; 2-motor shaft; 3-a bearing; 31-bearing convex ring; 4-wear resistant gasket.

Detailed Description

For a better understanding of the present invention, reference is made to the following detailed description and accompanying drawings. It should be understood that these examples are for further illustration of the present invention only, and are not intended to limit the scope of the present invention. It should be further understood that after reading the above description of the present invention, those skilled in the art will make certain insubstantial changes or modifications to the present invention, and shall still fall within the scope of the present invention.

Example 1

An axial positioning structure of a motor rotor is shown in figures 3-6 and comprises a motor rotor 1, a motor shaft 2 and a bearing 3, wherein the motor rotor 1 and the motor shaft 2 are fixed into a whole, and the motor shaft 2 rotates along with the motor rotor 1. The bearing 3 is two spherical bearings, and the symmetry sets up respectively in the both sides of electric motor rotor 1, and the hole matching installation of the both ends of motor shaft 2 and bearing 3.

A wear-resistant gasket 4 is arranged between the bearings 3 and the motor rotor 1, and protrusions, namely bearing convex rings 31, are arranged on the end surfaces of the two bearings 3 facing the motor rotor 1.

The working process of the axial positioning structure of the motor rotor of the embodiment is as follows:

during operation, motor rotor 1 is high-speed rotatory under the effect of motor stator excitation, and wear-resisting gasket 4 is under motor rotor 1's effect, and wear-resisting gasket 4 also can follow motor rotor 1 and rotate together to also there can be the friction between wear-resisting gasket 4 and the bearing 3. Because the terminal surface of bearing 3 is provided with bearing bulge loop 31 to be the friction of line contact between the terminal surface of bearing 3 and wear-resisting gasket 4, area of contact significantly reduces, thereby reduces the friction noise and the wearing and tearing between wear-resisting gasket 4 and the bearing 3.

Example 2

This embodiment is substantially the same as embodiment 1, except that, as compared with embodiment 1, as shown in fig. 7 to 8, not only the two bearings 3 are provided with the protrusions, i.e., the bearing convex rings 31, but also the two end faces of the motor rotor 1 are provided with the other protrusions, i.e., the rotor convex rings 11, so that line contact is formed between the end faces of the bearings 3 and the wear-resistant pads 4, and between the wear-resistant pads 4 and the end faces of the motor rotor 1, and thus the contact area is greatly reduced, and noise and wear can be effectively reduced.

Example 3

This embodiment is substantially the same as embodiment 1, except that, compared with embodiment 1, the protrusions are only disposed on two sides of the wear-resistant pad 4 to form a protruding ring (not shown) of the wear-resistant pad, so that the contact between the wear-resistant pad 4 and the end surface of the motor rotor 1 and the contact between the wear-resistant pad 4 and the end surface of the bearing 3 are both line contacts, thereby reducing the contact area and reducing noise and wear.

The above description is not intended to limit the present invention, and the present invention is not limited to the above examples. Those skilled in the art should also realize that changes, modifications, additions, or substitutions can be made without departing from the spirit and scope of the invention.

Claims

1. An axial positioning structure of a motor rotor is characterized by comprising the motor rotor (1), a motor shaft (2) and a bearing (3); the motor rotor (1) is connected with the motor shaft (2) in a matching way; the bearing (3) is in matched sleeve joint with the motor shaft (2); and a bulge is arranged between the opposite end surfaces of the motor rotor (1) and the bearing (3), so that the contact between the opposite end surfaces of the motor rotor (1) and the bearing (3) is linear contact or point contact.

2. An electric motor rotor axial positioning structure as claimed in claim 1, characterized in that, the number of the bearings (3) is two, and the two bearings are respectively arranged at two sides of the electric motor rotor (1); the motor shaft (2) is matched with an inner hole of the bearing (3) for installation; the protrusion is arranged on the bearing (3) to form a bearing convex ring (31).

3. An electric motor rotor axial positioning structure, as in claim 2, characterized in that said bearing eye (31) is provided on the end face of at least one of said bearings (3) facing said electric motor rotor (1).

4. An electric motor rotor axial positioning structure, as in claim 1, characterized in that said electric motor rotor (1) is fixed integrally with said motor shaft (2).

5. An electric machine rotor axial positioning structure, as in claim 1, characterized in that at least one of said bearings (3) is a spherical bearing.

6. An electric machine rotor axial positioning structure as claimed in claim 1, characterized in that a wear-resistant spacer (4) is provided between the electric machine rotor (1) and at least one of the bearings (3).

7. An axial positioning structure for the rotor of an electric machine according to claim 6, characterized in that the protrusions are provided on one or both sides of the wear-resistant pad (4) to form a wear-resistant pad protruding ring.

8. An electric machine rotor axial positioning structure, as in claim 1, characterized in that said protrusions are provided on said electric machine rotor (1), forming a rotor torus (11).

9. An electric machine rotor axial positioning structure, as in claim 8, characterized in that at least one end face of the electric machine rotor (1) is provided with the rotor raised ring (11).