A preloading tooling, preloading method and adjustment method for axial clearance of roller bearing

Abstract

The invention discloses a pre-tightening tool for the axial play of a roller bearing. The pre-tightening tool comprises a tool sleeve capable of being arranged on a shaft in a sleeving manner for pre-tightening. The invention further provides a pre-tightening method utilizing the tool. The pre-tightening method comprises the steps that the shaft is sleeved with the tool sleeve, the open end of the tool sleeve is connected with a bearing inner ring in an abutting manner, the closed end of the tool sleeve is connected with the shaft through a bolt and a high-pressure oil pipe connector, high-pressure oil is introduced for oil expanding, and the bolt is fastened according to pre-tightening force of needed compression springs. In addition, the invention discloses an adjusting method. A dummy shaft and a work shaft are subjected to measuring and match grinding two times, it is guaranteed that a distance ring, an adjusting gasket and bearing bodies are attached, then the pre-tightening method is implemented, and the tool sleeve is dismounted after a round nut is screwed down. By means of the tool sleeve, the pre-tightening force of the compression springs and the interference friction force of the bearing inner ring can be overcome, the axial play of the mounted bearing is prevented from distorting, the situation that during running, the adjusting gasket and the distance ring swing, and the bearing slips due to stress is avoided, and the service life of products is prolonged.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a pre-tightening tool, a pre-tightening method and an adjustment method for the axial clearance of a roller bearing. Background technique [0002] The rotation accuracy of the high-speed spindle is mainly related to the running accuracy of the bearing and the positioning accuracy of the support. When using radial bearings or angular contact bearings as supports (except for non-radial positioning). Bearings should have a certain clearance during assembly, but if the clearance is too large, it will cause shaft shifting, causing impact loads on the driving and passive gears, which will intensify the wear of the gears. Destroy the bearing; if the clearance is too small, the thermal expansion of the bearing will eliminate the clearance after the temperature rises during the operation, and the bearing will overheat or burn when the bearing works without clearance. [0003] For heavy-...

AI Technical Summary

Problems solved by technology

When adjusting the axial clearance of the bearing, conventional methods cannot overcome the compression force of the spring, so that the adjustment pad and the inner ring of the bearing cannot be attached when the parts are reassembled, resulting in distortion of the axial clearance of the bearing after installation and adjustment during operation. Pad shaking, abnormal noise, bearing force slipping and other phenomena will greatly reduce the life of the product and cause the product to be damaged in advance

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