CN210074949U

CN210074949U - Motor with detachable bearing fixing seat

Info

Publication number: CN210074949U
Application number: CN201921027132.8U
Authority: CN
Inventors: 倪祖根
Original assignee: SUZHOU KINGCLEAN ELECTRIC CO Ltd
Current assignee: Jiangsu Kingclean Intelligent Appliance Co Ltd
Priority date: 2019-07-03
Filing date: 2019-07-03
Publication date: 2020-02-14
Anticipated expiration: 2029-07-03

Abstract

The utility model provides a bearing fixing base detachable motor belongs to the motor field. The motor includes: the bracket component is provided with a first mounting hole; the bearing fixing seat is detachably arranged in the first mounting hole, and a second mounting hole is formed in the bearing fixing seat; the bearing is pressed in the second mounting hole; and the rotating shaft assembly comprises a rotating shaft, and the rotating shaft is arranged in the bearing in a pressing mode. The utility model discloses a problem that the bearing room preparation degree of difficulty is big, the bearing rework cost is big has been solved to the motor, has improved the stability when the bearing is fixed for the bearing room breaks away from all the other spare parts, only needs to dismantle when the assembly is bad or collide with the impaired and change the bearing fixing base, reduce cost.

Description

Motor with detachable bearing fixing seat

Technical Field

The utility model relates to a motor field especially relates to a motor.

Background

In the motor industry, most bearings are fixed by non-interference fit between a bearing outer ring and the inner diameter of a bearing chamber and interference fit between a bearing inner ring and a rotating shaft.

This type of fixation has the following disadvantages: the difficulty and the cost of manufacturing the parts of the motor with the bearing chamber are increased; the bearing chamber is connected with other parts into a whole, and cannot be disassembled, so that the rework cost is increased.

Therefore, the existing connection mode of the bearing and the rotating shaft has the problems of high difficulty in manufacturing the bearing chamber and high rework cost of the bearing.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a motor can solve the problem that the bearing room preparation degree of difficulty is big, the bearing cost of doing over again is big.

In particular, the present invention provides an electric machine comprising:

the bracket component is provided with a first mounting hole;

the bearing fixing seat is detachably arranged in the first mounting hole, and a second mounting hole is formed in the bearing fixing seat;

the bearing is pressed in the second mounting hole; and

the rotating shaft assembly comprises a rotating shaft, and the rotating shaft is arranged in the bearing in a pressing mode.

Optionally, the bearing fixing seat is press-mounted in the first mounting hole, and the bearing fixing seat has a protruding portion that extends out of the support assembly after penetrating through the first mounting hole, and the protruding portion is fixed to the support assembly by riveting.

Optionally, the protruding portion of the bearing fixing seat is fixed to the bracket assembly by riveting through at least 3 riveting points.

Optionally, the second mounting hole is a stepped hole and comprises a first round hole and a second round hole which are communicated with each other, the first round hole is far away from the extending portion, the diameter of the first round hole is larger than that of the second round hole, and a shaft shoulder used for abutting against one side end face of the bearing is formed at the joint of the first round hole and the second round hole.

Optionally, a yielding groove for providing a rotation space for the inner ring of the bearing is arranged at the joint of the shaft shoulder and the second round hole.

Optionally, the bearing fixing seat is stepped, one end of the bearing fixing seat with a smaller external dimension extends into the first mounting hole, and a shaft shoulder of the outer surface of the bearing fixing seat abuts against the bracket assembly.

Optionally, the bracket assembly comprises:

the bracket body is provided with the first mounting hole; and

and the stator core is fixed on the bracket body.

Optionally, the spindle assembly further comprises: the rotor core and the iron core cover are used for wrapping the rotor core and the stator core, and the rotor core and the iron core cover are arranged in the rotating shaft in a pressure-equalizing mode.

Compared with the prior art, the utility model has the advantages of:

1. the utility model discloses a motor has set up the bearing fixing base between bearing and bracket component, because the bearing is with bearing fixing base complex, and no longer with the interior bearing room cooperation of bracket component, consequently reduced the processing preparation degree of difficulty of bearing room in the bracket component.

2. Bearing fixing base detachably installs in bracket component department, consequently when the bearing goes wrong, for example the assembly is bad or when colliding with the damage, only need dismantle change bearing fixing base can to the problem that the bearing rework cost is big has been solved.

3. The utility model discloses a set up the groove of stepping down in bearing inner race department, produce the friction with the plane in the bearing fixing base when can preventing the inner race of bearing from rotating and destroy this plane.

4. The bearing fixing seat is fixed on the support component through riveting, and the stability of two sets of connections of the bearing fixing seat and the support component is improved.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a cross-sectional view of an electric machine according to an embodiment of the present invention;

fig. 2 is a partial view of a bearing holder and bracket assembly according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a bearing retainer according to an embodiment of the present invention;

fig. 4 is a schematic view of the installation steps of the motor according to an embodiment of the present invention.

The reference numbers in the drawings are:

motor 100, bracket component 10, first mounting hole 101, bracket body 11, stator core 12, bearing fixing base 20, second mounting hole 201, extension 21, riveting point 22, first round hole 202, second round hole 203, shaft shoulder 204, abdicating groove 205, bearing 30, pivot subassembly 40, pivot 41, rotor core 42, core cover 43.

Detailed Description

Fig. 1 is a cross-sectional view of a motor 100 according to an embodiment of the present invention. Fig. 4 is a schematic view of the installation steps of the motor 100 according to an embodiment of the present invention. As shown in fig. 1, the present invention provides an electric machine 100, which may generally include a bracket assembly 10, a bearing holder 20, a bearing 30, and a rotating shaft assembly 40. The bracket assembly 10 is provided with a first mounting hole 101 (see fig. 4). The bearing fixing seat 20 is detachably installed in the first installation hole 101, and a second installation hole 201 (see fig. 4) is formed inside the bearing fixing seat 20. The bearing 30 is press-fitted into the second mounting hole 201. The rotating shaft assembly 40 includes a rotating shaft 41, and the rotating shaft 41 is press-fitted into the bearing 30.

The bearing fixing seat 20 is disposed between the bearing 30 for mounting the rotating shaft assembly 40 and the bracket assembly 10 of the motor 100 of the embodiment, the bearing fixing seat 20 is detachably mounted in the first mounting hole 101 (i.e. the bearing chamber) of the bracket assembly 10, and the bearing fixing seat 20 is internally provided with the second mounting hole 201 for mounting the bearing 30, so that the rotating shaft assembly 40 and the bearing 30 are fixed and then mounted on the bracket assembly 10 through the bearing fixing seat 20. Because the bearing 30 is matched with the bearing fixing seat 20 and is not matched with the bearing chamber in the bracket component 10 any more, the processing and manufacturing difficulty of the bearing chamber in the bracket component 10 is reduced, only corresponding processing needs to be carried out on the bearing fixing seat 20, the bearing fixing seat 20 is a relatively simple part, and the processing is relatively complex without having multiple installation functions like the bracket component 10. In addition, the bearing fixing seat 20 is detachably installed at the bracket assembly 10, so when the bearing 30 has a problem, for example, the assembly is poor or the collision is damaged, only the bearing fixing seat 20 needs to be detached and replaced, thereby solving the problem that the rework cost of the bearing 30 is high.

Fig. 2 is a partial view of the riveting of the bearing fixing seat 20 and the bracket assembly 10 according to an embodiment of the present invention. Fig. 3 is a sectional view of a bearing holder 20 according to an embodiment of the present invention. As shown in fig. 1, in an embodiment, the bearing fixing seat 20 is press-fitted into the first mounting hole 101, for example, by interference fit, and the interference between the two may be set to 0.08-0.25 mm. As shown in fig. 2, referring to fig. 3, the bearing fixing seat 20 has a protruding portion 21 that protrudes out of the bracket assembly 10 after passing through the first mounting hole 101, and the protruding portion 21 is fixed to the bracket assembly 10 by riveting. Alternatively, as shown in fig. 2, the protruding portion 21 of the bearing holder 20 is riveted to the bracket assembly 10 by at least 3 riveting points 22. For example, the protruding portion 21 is riveted by 3 riveting points 22 uniformly distributed along the circumference, so as to achieve the effect of stable fixation, and in other embodiments, the number of the riveting points 22 can be adjusted according to the requirement.

The bearing fixing seat 20 of the present embodiment is press-fitted in the bracket assembly 10, and is riveted to the bracket assembly 10 by the extension portion 21 extending out of the first mounting hole 101, so that the stability of two sets of connections between the bearing fixing seat 20 and the bracket assembly 10 is improved, and the bearing 30 is press-fitted in the second mounting hole 201 of the bearing fixing seat 20, thereby indirectly improving the stability of the bearing 30 when being fixed.

In another embodiment, as shown in fig. 3, the second mounting hole 201 is a stepped hole, and includes a first circular hole 202 and a second circular hole 203 which are communicated with each other, the first circular hole 202 is far away from the extension portion 21 and has a diameter larger than that of the second circular hole 203, and a shoulder 204 for abutting against an end surface of one side of the bearing 30 is formed at a junction of the first circular hole 202 and the second circular hole 203.

By arranging the second mounting hole 201 as a stepped hole, the shaft shoulder 204 can be used to limit the movement of the bearing 30 along the axial direction thereof, and by matching with an elastic part arranged in the axial direction, such as a wave-shaped gasket, etc., the axial pre-tightening of the bearing 30 can be realized. Meanwhile, the large end of the stepped hole, that is, the first round hole 202 of the second mounting hole 201 is arranged at the end originally away from the protruding portion 21, that is, the first round hole 202 is arranged at the near end of the rotating shaft 41 when being inserted, so that the bearing 30 and the rotating shaft assembly 40 can be conveniently inserted into the second mounting hole 201 after being mounted. Wherein, the second round hole 203 can be used for further extending of the rotating shaft 41, and the diameter of the second round hole 203 can be set to be slightly larger than that of the rotating shaft 41 to facilitate the insertion thereof.

As shown in fig. 3, in one embodiment, a position where the shoulder 204 is connected to the second circular hole 203 is provided with a relief groove 205 for providing a rotation space for the inner ring of the bearing 30. Because the inner ring of the bearing 30 is fixed to the rotating shaft 41 by press fitting, for example, interference fit of 0.001-0.012 mm is adopted, so that the inner ring of the bearing 30 can rotate synchronously with the rotating shaft 41, and the plane is prevented from being damaged by friction between the inner ring of the bearing 30 and the plane in the bearing fixing seat 20 when the inner ring rotates by the arrangement of the relief groove 205.

In another embodiment, as shown in fig. 1, the bearing holder 20 has a step shape, one end of the bearing holder 20 with a smaller external dimension extends into the first mounting hole 101, and a shoulder 206 (see fig. 3) of the external surface of the bearing holder 20 abuts against the bracket assembly 10. The first mounting hole 101 may be a circular hole or a square hole, and the small end of the bearing holder 20 is configured to have a corresponding shape. Through setting up bearing fixing base 20 to the stairstepping for the solid part of shaft shoulder can butt in the first mounting hole 101 top of bracket component 10, with bearing fixing base 20 location in the axial, the butt through the shaft shoulder bears the axial force, makes both connect more stably.

As shown in S1 and S2 of fig. 4, in one embodiment, the bearing 30 is press-fitted into the bearing holder 20, and then the bearing and the holder are press-fitted into the first mounting hole 101 of the bracket assembly 10. The bearing 30 is fixedly connected with the bearing fixing seat 20, for example, interference of interference magnitude of 0.002-0.03 mm is connected, and the bearing 30 and the bearing fixing seat form a first assembly and then are integrally installed in the first installation hole 101 of the support assembly 10.

Alternatively, as shown in S4 of fig. 4, after the bearing 30 and the bearing holder 20 are mounted on the bracket assembly 10, the rotating shaft 41 is interference-connected to the bearing 30. That is, the rotating shaft 41 is inserted into the first member to support the rotating shaft assembly 40 at the bearing 30, so that the rotating shaft assembly 40 is rotatably coupled to the bracket assembly 10 (see S4 of fig. 4).

In one embodiment, as shown in fig. 4, the bracket assembly 10 includes a bracket body 11 and a stator core 12. The holder body 11 is provided with a first mounting hole 101. The stator core 12 is fixed to one side of the bracket body 11.

As shown in fig. 4, in another embodiment, the rotor assembly further includes a rotor core 42 (see fig. 1) and a core cover 43 for wrapping the rotor core 42 and the stator core 12, and the rotor core 42 and the core cover 43 are pressure-fitted to the rotating shaft 41.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.

Claims

1. A bearing mount detachable motor (100), comprising:

a bracket assembly (10) provided with a first mounting hole (101);

the bearing fixing seat (20) is detachably mounted in the first mounting hole (101), and a second mounting hole (201) is formed in the bearing fixing seat (20);

the bearing (30) is pressed in the second mounting hole (201); and

the rotating shaft assembly (40) comprises a rotating shaft (41), and the rotating shaft (41) is pressed in the bearing (30).

2. The electric machine (100) of claim 1,

the bearing fixing seat (20) is pressed in the first mounting hole (101), the bearing fixing seat (20) is provided with a protruding portion (21) which penetrates through the first mounting hole (101) and then extends out of the support component (10), and the protruding portion (21) is fixed to the support component (10) through riveting.

3. The electric machine (100) of claim 2,

the extending part (21) of the bearing fixing seat (20) is riveted and fixed at the bracket component (10) through at least 3 riveting points (22).

4. The electrical machine (100) of claim 2 or 3,

the second mounting hole (201) is a stepped hole and comprises a first round hole (202) and a second round hole (203) which are communicated, the first round hole (202) is far away from the extending portion (21) and the diameter of the first round hole is larger than that of the second round hole (203), and a shaft shoulder (204) used for being abutted to one side end face of the bearing (30) is formed at the joint of the first round hole and the second round hole.

5. The electric machine (100) of claim 4,

and a yielding groove (205) used for providing a rotating space for the inner ring of the bearing (30) is arranged at the joint of the shaft shoulder (204) and the second round hole (203).

6. The electric machine (100) of claim 4,

the bearing fixing seat (20) is in a step shape, one end with a smaller external dimension extends into the first mounting hole (101) of the support component (10), and a shaft shoulder (206) on the outer surface of the bearing fixing seat (20) abuts against the support component (10).

7. The electric machine (100) according to any of claims 1-3, 5 or 6, wherein the bracket assembly (10) comprises:

the bracket body (11) is provided with the first mounting hole (101); and

and a stator core (12) fixed to the bracket body (11).

8. The electric machine (100) of claim 7, wherein the shaft assembly (40) further comprises:

the stator comprises a rotor core (42) and a core cover (43) used for wrapping the rotor core (42) and the stator core (12), wherein the rotor core (42) and the core cover (43) are mounted on the rotating shaft (41) in a pressure equalizing mode.