A motor bearing mounting assembly

Abstract

The utility model discloses a motor bearing installation assembly, the component includes bearing unit, installs the bearing inner race on the rotor and with the end cover of bearing unit connection, bearing unit is the integrated assembly structure, bearing unit installs on bearing inner race, bearing unit includes the outer bearing cover, bearing outer ring and inner bearing cover of setting in proper order, inner bearing cover with outer bearing cover is pressed tightly bearing outer ring along the axial direction of rotor, and bearing outer ring with end cover transition fit. The utility model can effectively prolong the service life of bearing, guarantee equipment operation accuracy and stability, reduce operation energy consumption, improve system operation efficiency, and need not special tooling to bearing outer ring and carry out the disassembly, avoid damaging the mating surface, realize the reliable installation of motor bearing outer ring, ensure the reliable operation of motor bearing.

Description

Technical Field

[0001] This utility model belongs to the field of motor bearing installation technology, and in particular relates to a motor bearing installation assembly. Background Technology

[0002] As a supporting component for the motor rotor, the motor bearing supports the motor rotor (rotating component) on the motor end cover (stationary component), allowing the rotor to rotate relative to the end cover, thereby realizing the output of motor torque and power; Currently, for the structure of assembling the bearing outer ring with the inner bearing cover, end cover, and outer bearing cover, the bearing outer ring and end cover are often fitted with an interference fit, and the inner bearing cover, end cover, and outer bearing cover are assembled with bolts. However, the applicant has discovered the following problems with this assembly method: (1) The bearing outer ring and the end cover are interference fit, that is, special tooling is required when assembling the bearing outer ring and the end cover to ensure that the bearing is installed in place. Special tooling is also required when disassembling, and the mating surfaces are easily damaged. (2) Using an interference fit will reduce the radial clearance of the bearing, and the reduced bearing working clearance will lead to a higher bearing temperature rise during motor operation; (3) There is no assembly gap between the inner bearing cover and the end cover, which means that the heat inside the motor can easily be transferred to the bearing, resulting in a high bearing temperature rise. Utility Model Content

[0003] The purpose of this utility model is to overcome the defects of the prior art and provide a motor bearing mounting assembly. The inner bearing cover and the outer bearing cover press the outer ring of the bearing axially, while the outer ring of the bearing and the end cover are in a transition fit. This reduces the difficulty of the assembly and disassembly process of the bearing outer ring, reduces the impact of assembly on the radial clearance of the bearing, and reduces the bearing temperature rise.

[0004] The objective of this utility model is achieved through the following technical solution: An electric motor bearing mounting assembly includes a bearing unit, an inner bearing ring mounted on a rotor, and an end cover connected to the bearing unit. The bearing unit is an integrated assembly structure, mounted on the inner bearing ring. The bearing unit includes an outer bearing cover, an outer bearing ring, and an inner bearing cover arranged sequentially. The inner bearing cover and the outer bearing cover press against the outer bearing ring along the axial direction of the rotor, and the outer bearing ring transitions into the end cover.

[0005] In one embodiment, the inner bearing cap and the outer bearing cap are connected to the outer ring of the bearing by a first bolt and press the outer ring of the bearing axially. The first bolt passes through the end cap and there is a gap between the first bolt and the inner wall of the end cap. In this embodiment, the inner bearing cover and the outer bearing cover are axially pressed together along the bearing outer ring using the first bolt, without affecting the displacement of the end cover.

[0006] In one embodiment, there is an axial assembly gap between the end face of the inner bearing cover and the end face of the end cover, and the end face of the outer bearing cover is completely flush with the end face of the end cover. This implementation method ensures that the heat inside the motor dissipates outward as much as possible, reduces the transfer of heat from the motor to the bearing, improves the bearing's heat dissipation capacity, further reduces the bearing's temperature rise, effectively extends the bearing's service life, ensures the equipment's operating accuracy and stability, reduces operating energy consumption, and improves system operating efficiency.

[0007] In one embodiment, the outer bearing cover is fixedly connected to the end cover by a second bolt, the second bolt being embedded inside the end cover; In this embodiment, the end cover and the outer bearing cover are fixed by using a second bolt embedded inside the end cover, thus maintaining the gap between the end faces of the end cover and the inner bearing cover.

[0008] In one embodiment, the rotor is further provided with an inner oil seal, the end face of which is in complete contact with the end face of the rotor.

[0009] In one embodiment, the end face of the bearing inner ring is completely in contact with the end face of the inner oil seal, so that the bearing inner ring, the rotor, and the inner oil seal are assembled as a whole.

[0010] In one embodiment, an external oil seal is also included, the end face of which is in complete contact with the end face of the inner ring of the bearing.

[0011] In one embodiment, the inner bearing cover has a first mounting groove for mounting the inner oil seal.

[0012] In one embodiment, the outer bearing cover has a second mounting groove for mounting the outer oil seal.

[0013] This utility model also provides another method for installing motor bearings, based on the above-mentioned mounting components, including: The bearing unit is formed by pressing the outer bearing ring along the axial direction of the rotor with the inner bearing cover and the outer bearing cover, and connecting them to the outer bearing ring to form an integrated assembly, while making the outer bearing ring transition fit with the end cover. The end cap is connected to the outer bearing cap as a whole, and an axial assembly gap is maintained between the inner bearing cap and the end cap. Install the bearing inner ring and inner oil seal on the rotor, and make the end face of the inner oil seal completely fit with the end face of the rotor and the end face of the bearing inner ring. The bearing unit, which is integrated with the end cap, is mounted on the inner ring of the bearing. Install the outer oil seal and ensure that the end face of the outer oil seal is fully in contact with the end face of the bearing inner ring.

[0014] The beneficial effects of this utility model are as follows: (1) The bearing outer ring is pressed axially by the inner bearing cover and the outer bearing cover, and the bearing outer ring and the end cover are in transition fit, which reduces the difficulty of the bearing outer ring assembly and disassembly process, reduces the impact of assembly on the bearing radial clearance, and reduces the bearing temperature rise.

[0015] (2) There is an axial assembly gap between the inner bearing cover and the end cover, and the outer bearing cover is completely fitted to the end cover, which reduces the heat transfer from the inside of the motor to the bearing, improves the bearing's heat dissipation capacity, further reduces the bearing's temperature rise, effectively extends the bearing's service life, ensures the equipment's operating accuracy and stability, reduces operating energy consumption, improves system operating efficiency, and eliminates the need for special tooling to disassemble the bearing outer ring, avoiding damage to the mating surface, thus achieving reliable installation of the motor bearing outer ring and ensuring reliable operation of the motor bearing. Attached Figure Description

[0016] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings. Wherein: Figure 1 A schematic diagram of the structure of this utility model is shown; In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0017] Figure label: 1-Second bolt, 2-Bearing outer ring, 3-Bearing inner ring, 4-Rotor, 5-Outer oil seal, 6-Outer bearing cover, 7-First bolt, 8-End cover, 9-Inner bearing cover, 10-Inner oil seal. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] This utility model provides a motor bearing mounting assembly, such as Figure 1 As shown, it includes a bearing unit, a bearing inner ring 3 mounted on the rotor 4, and an end cover 8 connected to the bearing unit. The bearing unit is an integrated assembly structure. The bearing unit is mounted on the bearing inner ring 3. The bearing unit includes an outer bearing cover 6, a bearing outer ring 2, and an inner bearing cover 9 arranged in sequence. The inner bearing cover 9 and the outer bearing cover 6 press the bearing outer ring 2 along the axial direction of the rotor 4, and the bearing outer ring 2 and the end cover 8 are transitionally fitted. Specifically, such as Figure 1As shown, the inner bearing cover 9 and the outer bearing cover 6 are connected to the outer bearing ring 2 by the first bolt 7 and press the outer bearing ring 2 axially. The first bolt 7 passes through the end cover 8 and there is a gap between the first bolt 7 and the inner wall of the end cover 8. It should be noted that in this embodiment, the first bolt 7 sequentially passes through the outer bearing cover 6, the end cover 8, and the inner bearing cover 9. The outer bearing ring 2 is located between the outer bearing cover 6 and the inner bearing cover 9. Under the tightening force of the first bolt 7, the outer bearing cover 6 and the inner bearing cover 9 press the outer bearing ring 2 along the axial direction of the rotor 4. At the same time, there is a gap between the first bolt 7 and the inner wall of the end cover 8, that is, the end cover 8 can be displaced on the first bolt 7. The outer bearing ring 2 and the end cover 8 are in transition fit, that is, the inner bearing cover 9 and the outer bearing cover 6 press the outer bearing ring 2 along the axial direction. Meanwhile, the transition fit between the bearing outer ring 2 and the end cover 8 is a significant improvement over the existing technology's interference fit between the bearing outer ring 2 and the end cover 8, and the bolted assembly of the inner bearing cover 9, the end cover 8, and the outer bearing cover 6. This embodiment can significantly reduce the difficulty of assembling and disassembling the bearing outer ring 2, reduce the impact of assembly on the bearing radial clearance, and reduce the bearing temperature rise, thereby effectively extending the bearing's service life, ensuring the equipment's operating accuracy and stability, reducing operating energy consumption, and improving system operating efficiency. Furthermore, it eliminates the need for special tooling to disassemble the bearing outer ring 2, thus avoiding damage to the mating surfaces. In one embodiment, such as Figure 1 As shown, there is an axial assembly gap between the end face of the inner bearing cover 9 and the end face of the end cover 8, and the end face of the outer bearing cover 6 is completely flush with the end face of the end cover 8. Specifically, the outer bearing cover 6 is fixedly connected to the end cover 8 by the second bolt 1, and the second bolt 1 is embedded inside the end cover 8; It should be noted that in this embodiment, the outer bearing cover 6 and the end cover 8 are fixedly connected by the second bolt 1 embedded inside the end cover 8, that is, the end cover 8 is connected to the bearing unit as a whole. In this state, there is an axial assembly gap between the end face of the end cover 8 and the end face of the inner bearing cover 9, which reduces the heat transfer from the inside of the motor to the bearing, improves the heat dissipation capacity of the bearing, and thus reduces the temperature rise of the bearing. In one embodiment, such as Figure 1 As shown, an inner oil seal 10 is also installed on the rotor 4. The end face of the inner oil seal 10 is completely in contact with the end face of the rotor 4, and the end face of the bearing inner ring 3 is completely in contact with the end face of the inner oil seal 10, so that the bearing inner ring 3, the rotor 4 and the inner oil seal 10 can be assembled into one unit. Furthermore, it also includes an outer oil seal 5 installed on the rotor 4. The end face of the outer oil seal 5 is completely in close contact with the end face of the inner ring 3 of the bearing. The inner bearing cover 9 has a first mounting groove for installing the inner oil seal 10, and the outer bearing cover 6 has a second mounting groove for installing the outer oil seal 5. It should be noted that the bearing mounting assembly is completed by using the inner oil seal 10 and the outer oil seal 5 installed on the rotor 4. The inner oil seal 10 is installed on the rotor 4, and its end face is installed in place with the end face of the rotor 4 and the inner ring 3 of the bearing respectively. When installing the bearing unit, the first mounting groove on the inner bearing cover 9 cooperates with the inner oil seal 10. Finally, the outer oil seal 5 is installed along the second mounting groove. In one embodiment, the installation method of the mounting component of this utility model is as follows: The bearing unit is formed by pressing the outer bearing ring along the axial direction of the rotor with the inner bearing cover and the outer bearing cover, and connecting them to the outer bearing ring to form an integrated assembly, while making the outer bearing ring transition fit with the end cover. The end cap is connected to the outer bearing cap as a whole, and an axial assembly gap is maintained between the inner bearing cap and the end cap. Install the bearing inner ring and inner oil seal on the rotor, and make the end face of the inner oil seal completely fit with the end face of the rotor and the end face of the bearing inner ring. The bearing unit, which is integrated with the end cap, is mounted on the inner ring of the bearing. Install the outer oil seal and ensure that the end face of the outer oil seal is fully in contact with the end face of the bearing inner ring.

[0020] It should be noted that in this embodiment, the bearing outer ring and the end cover adopt an intermediate fit. The bearing outer ring is fixed by pressing the inner bearing cover and the outer bearing cover axially. Compared with the existing technology of interference fit between the bearing outer ring and the end cover, and the structure of bolt assembly of the inner bearing cover, the end cover, and the outer bearing cover, this installation method, based on the above-mentioned installation components, can significantly reduce the difficulty of the bearing outer ring assembly and disassembly process, reduce the impact of assembly on the radial clearance of the bearing, and reduce the bearing temperature rise. At the same time, the end cover and the outer bearing cover are connected as one unit. In this state, there is an axial assembly gap between the end face of the end cover and the end face of the inner bearing cover, which reduces the heat transfer from the inside of the motor to the bearing, improves the bearing's heat dissipation capacity, and further reduces the bearing temperature rise, effectively extending the bearing's service life, ensuring the equipment's operating accuracy and stability, reducing operating energy consumption, and improving system operating efficiency. Moreover, no special tooling is required to disassemble the bearing outer ring, avoiding damage to the mating surfaces, achieving reliable installation of the motor bearing outer ring, and ensuring reliable operation of the motor bearing.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] While specific embodiments of the present invention have been described herein with reference to them, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A motor bearing mounting assembly, characterized in that, The assembly includes a bearing unit, an inner bearing ring mounted on a rotor, and an end cover connected to the bearing unit. The bearing unit is an integrated assembly structure, mounted on the inner bearing ring. The bearing unit includes an outer bearing cover, an outer bearing ring, and an inner bearing cover arranged in sequence. The inner bearing cover and the outer bearing cover press against the outer bearing ring along the axial direction of the rotor, and the outer bearing ring and the end cover are in transition fit.

2. The motor bearing mounting assembly according to claim 1, characterized in that, The inner bearing cap and the outer bearing cap are connected to the outer ring of the bearing by a first bolt and are pressed against the outer ring of the bearing axially. The first bolt passes through the end cap and there is a gap between the first bolt and the inner wall of the end cap.

3. The motor bearing mounting assembly according to claim 1, characterized in that, There is an axial assembly gap between the end face of the inner bearing cover and the end face of the end cover, and the end face of the outer bearing cover is completely flush with the end face of the end cover.

4. The motor bearing mounting assembly according to claim 3, characterized in that, The outer bearing cover is fixedly connected to the end cover by a second bolt, which is embedded inside the end cover.

5. A motor bearing mounting assembly according to claim 1, characterized in that, The rotor is also equipped with an inner oil seal, the end face of which is completely in close contact with the end face of the rotor.

6. A motor bearing mounting assembly according to claim 5, characterized in that, The end face of the bearing inner ring is in complete contact with the end face of the inner oil seal, so that the bearing inner ring, the rotor and the inner oil seal are assembled as one unit.

7. A motor bearing mounting assembly according to claim 1, characterized in that, It also includes an external oil seal mounted on the rotor, the end face of which is in complete contact with the end face of the inner ring of the bearing.

8. A motor bearing mounting assembly according to claim 5, characterized in that, The inner bearing cover has a first mounting groove for installing the inner oil seal.

9. A motor bearing mounting assembly according to claim 7, characterized in that, The outer bearing cover has a second mounting groove for installing the outer oil seal.

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