CN210640772U

CN210640772U - Electric machine

Info

Publication number: CN210640772U
Application number: CN201920873884.XU
Authority: CN
Inventors: 彭光明; 阮哈伦; 刘晋平
Original assignee: Shanghai Moons Electric Co Ltd
Current assignee: Shanghai Moons Electric Co Ltd
Priority date: 2019-06-11
Filing date: 2019-06-11
Publication date: 2020-05-29
Anticipated expiration: 2029-06-11

Abstract

The utility model relates to a motor, this motor include stator, rotor, front bearing, rear bearing, preceding axle sleeve, back axle sleeve, front end housing, rear end housing and pivot, the rotor including preceding rotor core, magnet steel, the back rotor core that sets gradually, pivot, front bearing, preceding rotor core, magnet steel, back rotor core, preceding axle sleeve and the inside subassembly of back axle sleeve constitution, one of them external diameter in front bearing and the rear bearing the same with the internal diameter of stator. Compared with the prior art, the utility model has the advantages of the utilization ratio of motor core and the torque of motor have been promoted.

Description

Electric machine

Technical Field

The utility model relates to a motor.

Background

The existing motor structure is shown in the following figure 1 and comprises an existing motor stator 1, an existing motor rotor 2, existing motor magnetic steel 3, an existing motor front end cover 4, an existing motor rear end cover 5, an existing motor front bearing 6, an existing motor rear bearing 7, an existing motor winding 8, an existing motor rotating shaft 9, an existing motor front shaft sleeve 11 and an existing motor rear shaft sleeve 10.

In the existing motor scheme, the existing motor front bearing 6 and the existing motor rear bearing 7 are placed in the bearing chambers of the existing motor front end cover 4 and the existing motor rear end cover 5, the bearing chambers of the cast aluminum front end cover and the cast aluminum rear end cover need to be subjected to finish machining, the machining precision requirement is high, and the working hours are consumed.

When the motor is installed, in order to guarantee the installation accuracy, the front end cover and the rear end cover are all processed to form the rabbets installed on the inner diameter of the stator, so that two defects can be brought:

1) the front and rear end covers of cast aluminum are mounted on the spigot of the inner diameter of the stator and the rotor and need to be finished, so that the cost of the motor is increased.

2) The parts of the front end cover and the rear end cover of the cast aluminum, which are deep into the inner diameter of the stator, can lead the stator of the motor to be longer than the rotor of the motor, and the part of the stator longer than the rotor is only used for installation, thus reducing the utilization rate of silicon steel sheets of the stator of the motor and reducing the moment of the motor with the same length.

3) The existing motor front end cover 4 and the existing motor rear end cover 5 are connected with the existing motor stator 1 through screws, and the screw screwing time is long.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a motor for overcoming the above-mentioned drawbacks of the prior art.

The purpose of the utility model can be realized through the following technical scheme:

the utility model provides a motor, includes stator, rotor, front bearing, rear bearing, preceding axle sleeve, back axle sleeve, front end housing, rear end cap and pivot, the rotor including preceding rotor core, magnet steel, the back rotor core that sets gradually, pivot, front bearing, preceding rotor core, magnet steel, back rotor core, preceding axle sleeve and the inside subassembly of back axle sleeve constitution, one of them external diameter in front bearing and the back bearing the same with the internal diameter of stator.

Preferably, the front end cover and the rear end cover are stamped parts.

Preferably, the front end cover and the rear end cover are stamped parts made of stainless steel or galvanized plates.

Preferably, the front bearing is preferably a ball bearing, alternatively an oil bearing.

Preferably, the rear bearing is preferably an oil bearing, alternatively a ball bearing.

Preferably, the rear bearing is a flange bearing, and is connected with the rear end cover in a compression joint mode, and a flange surface of the rear bearing is abutted against the rear shaft sleeve; the front end cover and the rear end cover are respectively connected with the stator through welding.

Preferably, one part of the front bearing is arranged in the bearing chamber where the front end cover is arranged, and the other part of the front bearing is matched with the inner diameter of the stator and is installed in the stator.

Preferably, the front bearing is completely arranged in the bearing chamber where the front end cover is arranged.

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

(1) by utilizing the key design that the outer diameter of the front bearing or the rear bearing is the same as the inner diameter of the stator, the length of the stator core for mounting and positioning is reduced, the utilization rate of the motor core is improved, and the torque of the motor is improved;

(2) the concentricity of the stator and the rotor of the motor is ensured by the mounting and positioning mode of the front end cover and the rear end cover, and the front end cover and the rear end cover adopt stamping parts, so that the requirement on the processing precision of parts is reduced, the production efficiency is improved, and the cost of the motor is reduced;

(3) the utility model discloses step-by-step being applicable to step motor, being applicable equally to little frame number motors such as brushless.

Drawings

Fig. 1 is a schematic structural diagram of a conventional motor;

fig. 2 is a schematic diagram of the explosion structure of the present invention;

fig. 3 is a schematic cross-sectional view of embodiment 1 of the present invention;

fig. 4 is a schematic cross-sectional view of embodiment 2 of the present invention;

the motor comprises a stator 1, a rotor 2, a rotor 3, a front end cover 4, a rear end cover 5, a front bearing 6, a rear bearing 7, a winding 8, a rotating shaft 9, a rear shaft sleeve 10 and a front shaft sleeve 11, wherein the stator 1 is an existing motor stator, the rotor 2 is an existing motor rotor, the magnetic steel 3 is an existing motor, the front end cover 4 is an existing motor front end cover, the rear end cover 5 is an existing motor rear end cover, the front bearing 6 is an existing motor front bearing, the;

100 is stator, 101A is front rotor core, 101B is rear rotor core, 102 is magnetic steel, 103 is front bearing, 104 is rear bearing, 105A is front shaft sleeve, 105B is rear shaft sleeve, 106 is front end cover, 107 is rear end cover, 108 is rotation shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in fig. 2, a motor includes a stator 100, a rotor, a front bearing 103, a rear bearing 104, a front shaft sleeve 105A, a rear shaft sleeve 105B, a front end cover 106, a rear end cover 107 and a rotating shaft 108, wherein the rotor includes a front rotor core 101A, a magnetic steel 102 and a rear rotor core 101B which are sequentially arranged, the rotating shaft 108, the front bearing 103, the front rotor core 101A, the magnetic steel 102, the rear rotor core 101B, the front shaft sleeve 105A and the rear shaft sleeve 105B form an internal assembly, an outer diameter of the front bearing 103 is the same as an inner diameter of the stator 100, the rear bearing 104 is a flange bearing, and the rear bearing 104 is installed in the rear end cover 107;

before the motor is provided with an internal assembly, a false rotor matched with the inner diameter of the stator of the motor is adopted to penetrate into the stator 100 and the rear bearing 104, and the concentricity of the rear bearing 104 and the stator 100 is adjusted, or the concentricity of the rear bearing 104, the front end cover 106 and the stator 100 is adjusted.

The front end cover 106 and the rear end cover 107 are stamped parts, and the front end cover 106 and the rear end cover 107 are stamped parts made of stainless steel or galvanized plates, so that the requirement on the machining precision of parts is lowered, the production efficiency is improved, and the cost of the motor is lowered.

The front bearing 103 is preferably a ball bearing, alternatively an oil bearing. The rear bearing 104 is preferably an oil bearing, alternatively a ball bearing.

Example 1

The front bearing 103 is a common bearing, when in installation, one part of the bearing is arranged in a bearing chamber where the front end cover 106 is positioned, and the other part of the bearing is matched with the inner diameter of the stator 100, so that the concentricity of the rotor and the stator is improved;

the rear bearing 104 is a flange bearing, is installed with the rear end cover 107 in a compression joint mode, and the flange surface is arranged in the motor, so that the bearing can be prevented from being thrown out without gluing and fixing.

The front end cover 106 and the rear end cover 107 are connected to the stator 100 by welding.

The manufacturing method of the motor comprises the following steps:

1. firstly, the rear bearing 104 is pressed into the rear end cover 107;

2. penetrating the stator 100 and the rear bearing 104 through a false rotor matched with the inner diameter of the motor stator, adjusting the concentricity of the rear bearing 104 and the stator 100, and welding the rear end cover 107 with the stator 100;

3. taking out the false rotor, installing an internal assembly consisting of a rotating shaft 108, a front bearing 103, a front rotor core 101A, magnetic steel 102, a rear rotor core 101B, a front shaft sleeve 105A and a rear shaft sleeve 105B, and pressing the front bearing 103 into the stator 100;

4. pressing the front end cover 106 into the front bearing 103, and welding the front end cover 106 and the stator 100;

5. the front bearing 103 and the front end cap 106 are fixed by glue.

Example 2

The front bearing 103 is completely arranged in a bearing chamber where the front end cover 106 is arranged, and the front bearing 103 and the stator 100 have the same inner diameter but are not installed in the motor stator.

The manufacturing method of the motor comprises the following steps:

1. firstly, the rear bearing 104 is pressed into the rear end cover 107;

2. penetrating the stator 100 and the rear bearing 104 through a false rotor matched with the inner diameter of the motor stator, adjusting the concentricity of the rear bearing 104, the front end cover 106 and the stator 100, and respectively welding the front end cover 106 and the rear end cover 107 with the stator 100;

3. taking out the false rotor, and installing an internal assembly consisting of a rotating shaft 108, a front bearing 103, a front rotor core 101A, magnetic steel 102, a rear rotor core 101B, a front shaft sleeve 105A and a rear shaft sleeve 105B;

4. the front bearing 103 and the front end cap 106 are fixed by glue.

Example 3

The outer diameter of the rear bearing 104 is the same as the inner diameter of the stator 100, the front bearing 103 is a flange bearing, and the front bearing 103 is arranged in a front end cover 106;

before the motor is provided with an internal assembly, a false rotor matched with the inner diameter of a stator of the motor is adopted to penetrate into the stator 100 and the front bearing 103, and the concentricity of the front bearing 103 and the stator 100 is adjusted, or the concentricity of the front bearing 103, the rear end cover 106 and the stator 100 is adjusted. The rest is the same as above.

Therefore, the utility model discloses main innovation point is as follows:

1, the concentricity of the rear end cover installation is ensured through the positioning of the false rotor;

2, the outer diameter of the front bearing is the same as the inner diameter of the stator, and the concentricity of the front end cover is ensured by the installation and positioning design of the front bearing and the inner diameter of the stator;

3) the stator is used for the part reduction of installation location, has promoted motor stator core utilization ratio, has promoted the torque of motor.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a motor, includes stator (100), rotor, front bearing (103), rear bearing (104), preceding axle sleeve (105A), back axle sleeve (105B), front end housing (106), back end housing (107) and pivot (108), the rotor including preceding rotor core (101A), magnet steel (102), back rotor core (101B) that set gradually, pivot (108), front bearing (103), preceding rotor core (101A), magnet steel (102), back rotor core (101B), the inner assembly that front axle sleeve (105A) and back axle sleeve (105B) are constituteed, front end housing (106) and back end housing (107) be connected with stator (100) respectively, back bearing (104) be connected with back axle sleeve (105B), back end housing (107) respectively, front bearing (103) install on front end housing (106), its characterized in that, one of them external diameter in front bearing (103) and back bearing (104) is the same with the internal diameter of stator (100).

2. An electric machine according to claim 1, characterized in that the front end cover (106) and the rear end cover (107) are stamped parts.

3. An electric machine according to claim 2, characterized in that the front end cover (106) and the rear end cover (107) are stampings made of stainless steel or galvanized sheet.

4. An electric machine according to claim 1, characterized in that the front bearing (103) is preferably a ball bearing, alternatively an oil bearing.

5. An electric machine according to claim 1, characterized in that the rear bearing (104) is preferably an oil bearing, alternatively a ball bearing.

6. An electric machine according to claim 1, characterized in that the rear bearing (104) is a flange bearing, which is connected to the rear end cap (107) by crimping, the flange surface of the rear bearing (104) abutting against the rear bushing (105B); the front end cover (106) and the rear end cover (107) are respectively connected with the stator (100) through welding.

7. An electric machine according to claim 6, characterized in that the front bearing (103) is partly placed in the bearing chamber where the front cover (106) is located and partly fitted to the inner diameter of the stator (100) and fitted into the stator (100).

8. An electric machine according to claim 6, characterized in that the front bearing (103) is placed entirely in the bearing chamber where the front end cover (106) is located.