Bearing assembly and pre-tightening device of bearing

Abstract

The invention discloses a pre-tightening device of a bearing. The pre-tightening device comprises pre-tightening assemblies and a cantilever beam force value display instrument. Each pre-tightening assembly comprises a cantilever beam sensor with one suspended end. An adjusting piece is mounted at the suspended end of each cantilever beam sensor and abuts against one end of an ejection block, and the other end of the ejection block is attached to the bearing for pre-tightening. The pressure applied to the ejection block can be adjusted by means of adjustment of the adjusting pieces. The cantilever beam force value display instrument is in signal connection with the cantilever beam sensors and is used for displaying the force values of the cantilever beam sensors. The force needed for bearing pre-tightening is set, adjustment of the force, applied to the ejection block, of the adjusting pieces is stopped when the cantilever beam force value display instrument achieves the force value, and therefore the bearing is pre-tightened, and detection accuracy is improved through the structure via sensor detection. The invention further discloses a bearing assembly with the pre-tightening device of the bearing.

Description

technical field [0001] The invention relates to the technical field of bearing preloading, in particular to a bearing assembly and a bearing preloading device. Background technique [0002] The preload of rolling bearing means that after the bearing is assembled, a constant force is applied on the inner ring or outer ring of the bearing along its axial direction in a certain way, and this force is maintained to make the inner and outer rings move relative to each other. On the one hand, it can Eliminate the internal clearance of the bearing, and on the other hand, it can also force the rolling elements to be in close contact with the inner and outer rings, and produce a certain deformation at the contact point. [0003] Due to the effect of the pre-tightening force, the contact between the rolling body and the inner ring and the outer ring will produce elastic deformation, and the contact area will increase, and the number of rolling bodies participating in the bearing force...

AI Technical Summary

Problems solved by technology

[0004] At present, the disc spring is used as a supporting part for the preload of the bearing to be loaded into the bearing housing together. If the spring is accurately measured and pre-compressed before loading, it is indeed possible to ensure a certain range of preload at the same time. For the bearing The thermal expansion is compensated to a certain extent, but the required preload is obtained by measuring the deformation of the spring, which may easily lead to inaccurate preload

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