Bearing pre-tightening device

Abstract

The invention discloses a bearing pre-tightening device. The bearing pre-tightening device comprises a bearing, a bearing seat, an inclined sleeve, a lantern ring, a step shaft and cover plates, wherein a bearing inner ring and the step shaft are installed in a matched manner; a bearing outer ring and an inclined sleeve inner ring are installed in an interference fit manner; the outer side of theinclined sleeve and a lantern ring inner ring are installed in a matched manner; the outer surface of the inclined sleeve is conical; the shape of the lantern ring inner ring corresponds to the shapeof the outer surface of the inclined sleeve; the lantern ring outer ring is arranged in the bearing seat in a sliding manner; the cover plates are fixedly arranged on the two sides of the bearing seat; the cover plates and the step shaft are matched to be used for axially fixing the bearing inner ring; and the cover plates are further used for abutting against the outer ring of the end, close to the small size of the outer side of the inclined sleeve, of the bearing. The bearing pre-tightening device further comprises a pre-tightening mechanism used for pushing the bearing outer ring to move axially. By means of the bearing pre-tightening device, the pre-tightening range is enlarged, and the pre-tightening cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of bearing pretensioning, in particular to a bearing pretensioning device. Background technique [0002] The preloading of rolling bearings is to use appropriate methods to make a certain pre-deformation between the bearing rolling body and the inner and outer rings, so as to keep the inner and outer rings of the bearing in a compressed state, so that the bearing runs with negative clearance or zero clearance. The clearance of the bearing under normal working conditions is zero or negative clearance is the best, which can ensure the rotation accuracy of the shaft to the maximum extent, reduce the vibration and noise of the shaft, and prolong the life of the bearing. In the prior art, most of the pre-tightening of the bearing before work is purely mechanical, through the interaction of forces, and the opposite force on the sleeve is used to apply a certain load to the bearing, so as to achieve the effect of p...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of high cost, poor control, and excessive hysteresis error in the existing bearing preloading, the present invention provides a bearing preloading device, including bearings, bearing seats, inclined sleeves, collars, and steps Shaft and cover plate, the inner ring of the bearing is installed in cooperation with the stepped shaft, the outer ring of the bearing is installed in interference fit with the inner ring of the inclined sleeve, and the outer side of the inclined sleeve is installed in cooperation with the inner ring of the collar , the outer surface of the inclined sleeve is tapered, the shape of the inner ring of the collar corresponds to the shape of the outer surface of the inclined sleeve, the outer ring of the collar is slidably arranged in the bearing seat, and the two sides of the bearing seat Both are fixed with the cover plate, the cover plate cooperates with the stepped shaft to axially fix the inner ring of the bearing, and the cover plate is also used to hold the bearing close to the outer side of the inclined sleeve with a smaller size The outer ring at one end also includes a pre-tension mechanism for pushing the outer ring of the bearing to move axially, and the pre-tension mechanism is arranged on the cover plate near the larger end of the outer side of the oblique sleeve

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