Method for selecting outer rotor matched with gyro motor bearings and selection device

Abstract

The invention discloses a method for selecting an outer rotor matched with gyro motor bearings and a selection device. The method comprises the following steps: firstly, sheathing and installing paired gyro motor bearings onto gyro motor shafts; then, exerting a set axial load on two outer rings of the paired gyro motor bearings; at this time, measuring the shaft shoulder space value of the two outer rings after the load application; and finally, selecting the outer rotor of the gyro motor with the height corresponding to the shaft shoulder space value. The measuring device comprises an air bearing, a poise loading disc, a centering positioning seat, a first displacement sensor and a second displacement sensor. Through the method for selecting the outer rotor matched with the gyro motor bearings and the selection device, the assembling speed of the gyro motor is greatly improved, and the mass production of the gyro motor is realized.

Description

technical field [0001] The invention belongs to the technical field of gyro motor bearing preload measurement. Background technique [0002] The preload of the gyro motor bearing is a very critical parameter, and its accuracy will directly affect the overall performance of the gyro motor. The function of preload is mainly to produce a certain pre-deformation when the bearing is originally installed, to eliminate the excessive gap, so that the bearing can skip the initial large deformation stage in actual use, significantly improve the support rigidity, and at the same time apply a suitable force to the bearing. The preload can improve the rotation accuracy of the gyro motor rotor, thereby improving the overall performance of the gyro motor. [0003] Such as figure 1 Shown is the schematic structure of the gyro motor bearing assembly. When assembling the gyro motor, the pair of bearings 21 are assembled on the gyro motor shaft 22. The inner ring of the bearing matches the s...

AI Technical Summary

Problems solved by technology

Due to the adoption of such a gyro motor assembly process, the result is a large assembly error of the gyro motor bearing, and the preload loaded on the gyro motor bearing after assembly is sometimes too large, sometimes too small; too large a preload affects the rotational flexibility of the gyro motor, Unnecessary power loss is caused, and the preload is too small to meet the requirements of stiffness and rotation accuracy. Therefore, the accuracy of the preload loading of the gyro motor bearing has seriously affected the overall performance and reliability of the gyro motor, affecting the gyro motor. The overall assembly pass rate

[0004] At present, many manufacturers of gyro motors in China have also adopted many methods to improve the assembly process of gyro motors. However, due to the small preload level of gyro motor bearings and high precision requirements, these methods cannot effectively improve the overall performance of gyro motors. The qualified rate of assembly can only be screened by conducting targeted tests on the gyro motor after the overall assembly, and the external rotor of the gyro motor whose actual preload is not suitable for the bearing is repaired and processed, which will increase the additional cost of the gyro motor. The overall assembly cost, and affect the mass production of gyro motors, reducing production efficiency

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