Center-adjusting device for pressing and assembling bearing

Abstract

The invention relates to the field of motor rotors, in particular to a center-adjusting device for pressing and assembling a bearing. The center-adjusting device for pressing and assembling the bearing comprises a supporting frame and a support which is used for accommodating the bearing to be assembled. A hole through which a rotating shaft to be assembled can pass is formed in the support, and a center-adjusting bearing assembly is arranged between the support and the supporting frame. An inner ring and an outer ring of the center-adjusting bearing assembly are connected with the support and the supporting frame respectively, the inner ring and the outer ring of the center-adjusting bearing assembly can mutually float, the axis of the inner ring and the axis of the outer ring can not be overlapped, and therefore the support connected with the outer ring can float relative to the supporting frame. When the bearing is pressed and assembled, the rotating shaft of a rotor penetrates through an inner hole of the bearing and then extends into the hole in the support in a hanging mode. When the axis of the bearing and the axis of the rotating shaft are not located in the same straight line, the support can swing in a deviation mode along with the extending of the rotating shaft until the axis of the bearing and the axis of the rotating shaft are overlapped. Therefore, the center can be automatically adjusted when the bearing is pressed and assembled, the concentricity of the bearing and the rotating shaft is guaranteed, and the quality of the rotator is improved.

Description

technical field [0001] The invention relates to the field of motor rotors, in particular to an aligning device for press-fitted bearings. Background technique [0002] Bearings need to be installed on the rotating shaft of the motor rotor. At present, the bearings are directly pressed onto the rotating shaft. There is no alignment before installation. In addition, there will be tolerances in the dimensions of the rotating shaft and bearings. The concentricity of the ring has to be firmly pressed on the shaft. If the axes of the shaft and the bearing are not on the same line during the assembly process, such installation will cause the shaft and bearing to be deformed by stress after assembly, resulting in increased noise of the rotor. When the noise is too large, the bearings need to be removed and re-installed, which wastes a lot of bearings, increases the production cost and also increases the workload and reduces the work efficiency. Contents of the invention [0003] ...

AI Technical Summary

Problems solved by technology

[0002] Bearings need to be installed on the rotating shaft of the motor rotor. At present, the bearings are directly pressed onto the rotating shaft. There is no alignment before installation. In addition, there will be tolerances in the dimensions of the rotating shaft and bearings. The concentricity of the ring has to be firmly pressed on the shaft. If the axes of the shaft and the bearing are not on the same line during the assembly process, such installation will cause the shaft and bearing to be deformed by stress after assembly, resulting in increased noise of the rotor. When the noise is too loud, the bearing needs to be removed and re-installed, which wastes a lot of bearings, increases the production cost and also increases the workload and reduces the work efficiency

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