Pre-tightening force applying tool for four-point contact bearing of motor
By using wave springs and tapered bearing connections in the motor four-point contact bearing preloading processing and assembly, the problem of insufficient preloading force during separate testing of the motor is solved, and stable preloading force adjustment is achieved and damage is prevented, reducing abnormal noise and vibration.
Patent Information
- Application Number
- CN202422243795.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-09-13
AI Technical Summary
During the test of the existing motor, the bearing preload is insufficient due to the failure of the gearbox to be installed, resulting in the bearing being unable to work normally, resulting in abnormal noise and vibration.
The preloading of the motor four-point contact bearing is used to apply the preloading force of the motor. By installing a corrugated spring between the installation back cover and the outer ring mounting seat, and using a tapered bearing connection, a detachable preload adjustment method is provided, and the square hole connection is combined to prevent rotational damage.
It realizes that sufficient preload force is provided when the motor is tested separately to prevent bearing damage, reduce abnormal noise and vibration, and adapt to the preload force needs of different motor bearings.
Smart Images
Figure CN223246386U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of motor bearings, and in particular relates to a tool for applying preload force to a four-point contact bearing of a motor. Background Art
[0002] Common new energy heavy-duty truck motor bearings rely on internal wave springs and a matching gearbox to provide the required preload for four-point contact bearing operation. However, when testing the motor alone without the gearbox installed, the bearings experienced insufficient preload, causing them to malfunction and resulting in abnormal noise and vibration.
[0003] Existing bearing preload solutions typically use internal motor wave springs. These solutions, designed with the limited axial preload capacity of ball bearings in mind, cannot utilize larger wave springs to provide sufficient preload for the four-point contact bearings. This results in insufficient preload on the four-point contact bearings during motor operation. Increasing preload requires increasing the number of wave springs or changing their specifications, which can shorten bearing life and require disassembly of the motor. Utility Model Content
[0004] The main purpose of the utility model is to provide a tool for applying preload force to the four-point contact bearing of a motor, which solves the problem that when the existing motor is tested alone, the preload force on the bearing is insufficient due to the lack of an installed gearbox, the bearing cannot work normally, and the motor causes abnormal noise and vibration.
[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a motor four-point contact bearing preload force applying tooling, including a motor main shaft and an outer ring mounting seat, a four-point contact bearing is installed on the motor main shaft, a motor rear end cover is installed at the front end of the motor main shaft, the motor rear end cover is connected to the mounting rear cover, the inner side of the mounting rear cover is connected to the outer ring mounting seat, and a top shaft tooling is also provided at the front end of the motor main shaft, the top shaft tooling includes a tapered bearing, the tapered bearing includes a tapered bearing inner ring and a tapered bearing outer ring, the tapered bearing inner ring is installed on the motor main shaft, and the tapered bearing outer ring is installed in the outer ring mounting seat.
[0006] Furthermore, the mounting rear cover is fixed to the rear end cover of the motor by bolts.
[0007] Furthermore, a wave spring is installed between the mounting rear cover and the outer ring mounting seat.
[0008] Furthermore, the outer ring mounting seat and the mounting rear cover are connected using square holes.
[0009] Furthermore, the outer ring mounting seat is also connected to a limiting block.
[0010] Compared with the prior art, the present invention has the following beneficial effects:
[0011] 1. This utility model installs a wave spring between the rear cover and the outer ring mounting seat. By compressing the wave spring, a preload force is provided to the motor bearing to meet the operating conditions of the bearing. The wave spring is detachable. By replacing wave springs of different quantities and specifications, different preload forces can be provided to meet the preload requirements of different motor bearings.
[0012] 2. The utility model uses a tapered bearing to connect the top shaft fixture, which can withstand a large preload and prevent the fixture from being damaged;
[0013] 3. The outer ring mounting seat of the utility model is connected to the mounting rear cover using a square hole, which can prevent the outer ring mounting seat from rotating together with the motor main shaft and damaging the tooling. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 The utility model is a structural schematic diagram of a tool for applying preload force to a four-point contact bearing of a motor.
[0015] In the figure: 1. Four-point contact bearing; 2. Motor main shaft; 3. Motor rear end cover; 4. Install the rear cover; 5. Outer ring mounting seat; 6. Wave spring; 7. Limit block; 8. Tapered bearing outer ring; 9. Tapered bearing inner ring; 10. Top shaft tooling; 11. Bolt. DETAILED DESCRIPTION
[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0017] See also Figure 1 The utility model discloses a tool for applying preload force to a four-point contact bearing of a motor, comprising a motor main shaft 2 and an outer ring mounting seat 5. A four-point contact bearing 1 is mounted on the motor main shaft 2, and a motor rear end cover 3 is mounted on the front end of the motor main shaft 2. A top shaft tool 10 is also provided at the front end of the motor main shaft 2. The top shaft tool 10 includes a tapered bearing, which includes a tapered bearing inner ring 9 and a tapered bearing outer ring 8. The tapered bearing inner ring 9 is mounted on the motor main shaft 2, and the tapered bearing outer ring 8 is mounted in the outer ring mounting seat 5. By providing a tapered bearing connection, a large preload force can be withstood, preventing damage to the tool.
[0018] Furthermore, the motor rear end cover 3 is connected to the mounting rear cover 4 . Specifically, the mounting rear cover 4 is fixed to the motor rear end cover 3 by bolts 11 .
[0019] Furthermore, the inner side of the rear cover 4 is connected to the outer ring mounting seat 5, and a wave spring 6 is installed between the rear cover 4 and the outer ring mounting seat 5. The wave spring 6 is detachable. By replacing wave springs 6 of different quantities and specifications, different sizes of preload can be provided to meet the preload requirements of different motor bearings.
[0020] Preferably, the outer ring mounting seat 5 is connected to the mounting rear cover 4 by using a square hole, which can prevent the outer ring mounting seat 5 from rotating together when the motor main shaft 2 rotates and damaging the tooling.
[0021] Furthermore, the outer ring mounting seat 5 is connected to the limiting block 7. By providing the limiting block 7, the outer ring mounting seat 5 can be prevented from falling out during use.
[0022] When using the present invention, first install the tapered bearing inner ring 9 on the motor main shaft 2, and the tapered bearing outer ring 8 on the outer ring mounting seat 5. Fasten the mounting rear cover 4 to the rear motor rear end cover 3 via bolts 11. When the motor main shaft 2 moves, a preload is applied to the motor bearing. After installing this fixture, compression of the wave spring 6 provides preload to the motor bearing, meeting the bearing's operating conditions.
[0023] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.
[0024] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A tool for applying preload force to a four-point contact bearing of a motor, characterized by: The invention comprises a motor main shaft (2) and an outer ring mounting seat (5), wherein a four-point contact bearing (1) is mounted on the motor main shaft (2), a motor rear end cover (3) is mounted on the front end of the motor main shaft (2), the motor rear end cover (3) is connected to a mounting rear cover (4), the inner side of the mounting rear cover (4) is connected to the outer ring mounting seat (5), and a top shaft tooling (10) is further provided at the front end of the motor main shaft (2), the top shaft tooling (10) comprises a tapered bearing, the tapered bearing comprises a tapered bearing inner ring (9) and a tapered bearing outer ring (8), the tapered bearing inner ring (9) is mounted on the motor main shaft (2), and the tapered bearing outer ring (8) is mounted in the outer ring mounting seat (5).
2. The tool for applying preload force to a four-point contact bearing of a motor according to claim 1, characterized in that: The mounting rear cover (4) is fixed to the motor rear end cover (3) via bolts (11).
3. The tool for applying preload force to a four-point contact bearing of a motor according to claim 1, characterized in that: A wave spring (6) is installed between the mounting rear cover (4) and the outer ring mounting seat (5).
4. The tool for applying preload force to a four-point contact bearing of a motor according to claim 1, characterized in that: The outer ring mounting seat (5) is connected to the mounting rear cover (4) using square holes.
5. The tool for applying preload force to a four-point contact bearing of a motor according to claim 1, characterized in that: The outer ring mounting seat (5) is also connected to a limiting block (7).