Bearing assembly and bearing preloading device

Abstract

The invention discloses a pre-tightening device of a bearing. The pre-tightening device comprises an upper pressing plate, a lower pressing plate, a spring, a positioning identifier, an adjusting assembly and a distance ring, wherein the spring is arranged between the upper pressing plate and the lower pressing plate; and the position of the upper pressing plate with respect to the lower pressing plate is adjusted by the adjusting assembly so as to realize application of difference force to the distance ring, and further the pre-tightening force applied to the bearing is adjusted. The pre-tightening device has the beneficial effects that when the set positioning identifier is pre-tightening force required by the bearing, the pre-tightening force is considered to be deformation amount required by the spring; when the bearing needs to be pre-tightened, the deformation amount of the spring is changed by changing the distance between the upper pressing plate and the lower pressing plate; when the spring reaches a preset position, the needed pre-tightening force is achieved; a technician does not need to measure the spring for calculating the pre-tightening force in a pre-tightening process, thereby improving the pre-tightening accuracy and pre-tightening efficiency. The invention also 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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