Bearing structure and high-low speed motor

Abstract

The utility model discloses a bearing structure. The bearing structure comprises an inner bearing pack, an outer bearing assembly and an end cover, the inner bearing assembly comprises a first outer cover, a first inner cover and an inner bearing assembled between the first outer cover and the first inner cover. The outer bearing assembly comprises a second outer cover, a second inner cover and an outer bearing assembled between the second outer cover and the second inner cover; the end cover comprises a front end cover and a rear end cover which are oppositely arranged, the inner bearing assembly is installed in an inner chamber formed between the front end cover and the rear end cover, and the end cover further comprises a bearing table for installing the outer bearing assembly. In addition, the utility model also discloses a high-low speed motor with the bearing structure. The outer bearing assembly is arranged in the end cover on the outer side of the inner bearing assembly, the inner bearing assembly and the outer bearing assembly are suitable for the high-low speed motor, the structure is compact, and the adaptability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a bearing structure and a high-speed and low-speed motor. Background Art

[0002] Bearings are an important component in modern mechanical equipment. Their main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. The bearing structure of the motor is a special bearing specially used on the motor. The bearing structure used in the motor is a part used to support the rotating shaft, and the bearing structure can guide the rotation of the rotating shaft. The existing motor bearing structure generally includes a front bearing and a rear bearing. The front bearing and the rear bearing support the front and rear of the rotating shaft, and the rotating shaft rotates at high speed with the support of the front bearing and the rear bearing. However, when the motor is a high-speed or low-speed motor, the existing bearing structure cannot meet the high-speed or low-speed rotation of the rotating shaft. Therefore, it is necessary to develop a new bearing structure to solve the above technical problems. Utility Model Content

[0003] The purpose of the utility model is to provide a bearing structure and a high-speed and low-speed motor.

[0004] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solution: a bearing structure, which includes:

[0005] an inner bearing assembly comprising a first outer cover, a first inner cover, and an inner bearing assembled between the first outer cover and the first inner cover;

[0006] an outer bearing assembly comprising a second outer cover, a second inner cover, and an outer bearing assembled between the second outer cover and the second inner cover;

[0007] The end cover comprises a front end cover and a rear end cover which are arranged opposite to each other. The inner bearing assembly is installed in an inner chamber formed between the front end cover and the rear end cover. The end cover also comprises a bearing platform for installing the outer bearing assembly.

[0008] As a further improved technical solution of the present invention, the inner bearing assembly has two groups, which are respectively arranged adjacent to the front end cover and the rear end cover.

[0009] As a further improved technical solution of the present invention, the outer bearing assembly has two groups, which are respectively installed in the bearing platform of the front end cover and the bearing platform of the rear end cover.

[0010] As a further improved technical solution of the present invention, a first oil seal facing the inner bearing is provided in the first outer cover and the first inner cover, and a second oil seal facing the outer bearing is provided in the second outer cover and the second inner cover.

[0011] As a further improved technical solution of the present invention, the first oil seal is a skeleton oil seal, and the second oil seal is a skeleton oil seal.

[0012] As a further improved technical solution of the present invention, a limiting protrusion for limiting the outer bearing is provided on the bearing platform.

[0013] As a further improved technical solution of the present invention, the second outer cover is locked to the end cover by a fastener.

[0014] The present utility model also discloses a high-speed and low-speed motor, which includes a rotating shaft, a permanent magnet rotor, a stator and the bearing structure as described above, wherein the permanent magnet rotor is sleeved on the rotating shaft, the inner bearing assembly is sleeved on the rotating shaft and located between the rotating shaft and the permanent magnet rotor, the outer bearing assembly is sleeved on the rotating shaft and located between the rotating shaft and the end cover, and the stator is fixed to the front cover and the rear cover.

[0015] As a further improved technical solution of the present invention, the inner bearing assembly and the permanent magnet rotor form a high-speed rotor, and the outer bearing assembly and the stator form a low-speed rotor.

[0016] As a further improved technical solution of the present invention, the high-speed rotor and the low-speed rotor form a size structure.

[0017] The beneficial effects of the utility model are as follows: an outer bearing assembly is arranged in the end cover outside the inner bearing assembly, the inner bearing assembly and the outer bearing assembly are suitable for high-speed and low-speed motors, and have a compact structure and good adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the bearing structure of the utility model and the high-speed and low-speed motors having the same;

[0019] Figure 2 yes Figure 1 Enlarged schematic diagram of the middle circle A;

[0020] Figure 3 yes Figure 1 Enlarged schematic diagram of circle B. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the various embodiments shown in the accompanying drawings. The drawings illustrate preferred embodiments of the present invention. However, it should be noted that these embodiments are not intended to limit the present invention, and any equivalent functional, methodological, or structural modifications or substitutions made by persons of ordinary skill in the art based on these embodiments fall within the scope of protection of the present invention.

[0022] Please refer to Figures 1 to 3The utility model discloses a bearing structure 100, which includes an inner bearing assembly 1, an outer bearing assembly 2 and an end cover 3. The inner bearing assembly 1 includes a first outer cover 11, a first inner cover 12 and an inner bearing 13 assembled between the first outer cover 11 and the first inner cover 12. The outer bearing assembly 2 includes a second outer cover 21, a second inner cover 22 and an outer bearing 23 assembled between the second outer cover 21 and the second inner cover 22. The end cover 3 includes a front end cover 31 and a rear end cover 32 that are relatively arranged. The inner bearing assembly 1 is installed in an inner chamber 33 formed between the front end cover 31 and the rear end cover 32. The end cover 3 also includes a bearing platform 34 for mounting the outer bearing assembly 2. The outer bearing assembly 1 is provided in the end cover 3 on the outer side of the inner bearing assembly 2. The inner bearing assembly 1 and the outer bearing assembly 2 are suitable for high and low speed motors 200, and have a compact structure and good adaptability.

[0023] Specifically, there are two sets of inner bearing assemblies 1, respectively positioned adjacent to the front end cover 31 and the rear end cover 32. There are two sets of outer bearing assemblies 2, respectively mounted in the bearing platforms 34 of the front end cover 31 and the rear end cover 32. A first oil seal 14 facing the inner bearing 13 is installed within the first outer cover 11 and the first inner cover 12, while a second oil seal 24 facing the outer bearing 23 is installed within the second outer cover 21 and the second inner cover 22. Preferably, the first oil seal 14 is a skeleton oil seal, and the second oil seal 24 is a skeleton oil seal.

[0024] Specifically, the bearing platform 34 is provided with a limiting protrusion 341 for limiting the outer bearing 23 to effectively position the outer bearing 23. The second outer cover 21 is locked to the end cover 3 by a fastener 35. Preferably, the fastener 35 is a fastening bolt to further position and install the outer bearing 23.

[0025] The present invention also discloses a high-speed and low-speed motor 200, comprising a rotating shaft 4, a permanent magnet rotor 5, a stator 6, and the bearing structure 100 described above. The permanent magnet rotor 5 is sleeved on the rotating shaft 4, an inner bearing assembly 1 is sleeved on the rotating shaft 4 and positioned between the rotating shaft 4 and the permanent magnet rotor 5, an outer bearing assembly 2 is sleeved on the rotating shaft 4 and positioned between the rotating shaft 4 and the end cap 3, and the stator 6 is fixed to the front end cap 31 and the rear end cap 32. The inner bearing assembly 1 and the permanent magnet rotor 5 form a high-speed rotor, while the outer bearing assembly 2 and the stator 6 form a low-speed rotor. The high-speed and low-speed rotors form a dimensional structure, and the high-speed and low-speed motors ultimately achieve a reduction in speed through a magnetic gear (not shown).

[0026] The high- and low-speed motor 200 of the present invention is provided with a bearing structure 100. The bearing structure 100 includes two sets of inner bearing assemblies 1 and outer bearing assembly 3. The outer bearing assembly 3 is mounted in a bearing platform 34 of an end cap 3. The inner bearing assembly 1 and a permanent magnet rotor 5 form a high-speed rotor, and the outer bearing assembly 2 and a stator 6 form a low-speed rotor. The high-speed rotor and the low-speed rotor form a dimensional structure, and a deceleration effect is achieved through a magnetic gear, enabling high and low speed operation, optimizing the motor structure, and having a compact structure. The bearing structure 100 is suitable for high and low speed motors 200. The high and low speed motors 200 achieve high and low speed operation through the bearing structure 100, and the high and low speed motors 200 achieve high and low speed operation and a compact structure.

[0027] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0028] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bearing structure, characterized in that: It includes: an inner bearing assembly comprising a first outer cover, a first inner cover, and an inner bearing assembled between the first outer cover and the first inner cover; an outer bearing assembly comprising a second outer cover, a second inner cover, and an outer bearing assembled between the second outer cover and the second inner cover; The end cover comprises a front end cover and a rear end cover which are arranged opposite to each other. The inner bearing assembly is installed in an inner chamber formed between the front end cover and the rear end cover. The end cover also comprises a bearing platform for installing the outer bearing assembly.

2. The bearing structure according to claim 1, characterized in that: The inner bearing assembly has two groups, which are respectively arranged adjacent to the front end cover and the rear end cover.

3. The bearing structure according to claim 1, characterized in that: The outer bearing assembly has two groups, which are respectively installed in the bearing platform of the front end cover and the bearing platform of the rear end cover.

4. The bearing structure according to claim 1, characterized in that: A first oil seal facing the inner bearing is provided in the first outer cover and the first inner cover, and a second oil seal facing the outer bearing is provided in the second outer cover and the second inner cover.

5. The bearing structure according to claim 4, characterized in that: The first oil seal is a skeleton oil seal, and the second oil seal is a skeleton oil seal.

6. The bearing structure according to claim 1, characterized in that: The bearing platform is provided with a limiting protrusion for limiting the outer bearing.

7. The bearing structure according to claim 1, characterized in that: The second outer cover is fastened to the end cover by a fastener.

8. A high-speed and low-speed motor, characterized in that: It includes a rotating shaft, a permanent magnet rotor, a stator and a bearing structure according to any one of claims 1 to 7, wherein the permanent magnet rotor is sleeved on the rotating shaft, the inner bearing assembly is sleeved on the rotating shaft and located between the rotating shaft and the permanent magnet rotor, the outer bearing assembly is sleeved on the rotating shaft and located between the rotating shaft and the end cover, and the stator is fixed to the front cover and the rear cover.

9. The high-speed and low-speed motor according to claim 8, characterized in that: The inner bearing assembly and the permanent magnet rotor form a high-speed rotor, and the outer bearing assembly and the stator form a low-speed rotor.

10. The high-speed and low-speed motor according to claim 9, characterized in that: The high-speed rotor and the low-speed rotor form a size structure.

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