Pre-tightening device of coupled thrust ball bearings

Abstract

Disclosed is a pre-tightening device of coupled thrust ball bearings. The pre-tightening device of coupled thrust ball bearings includes a nut, a circular inclined section spring, and two clamping plates. The two thrust ball bearings are arranged on a transmission shaft back to back in a sleeving mode and the outer rings are all supported on a bearing seat; the inner rings of the two thrust ball bearings are fixed through the nut and a first shaft sleeve; the outer rings of the two thrust ball bearings are fixed through a bearing end cover, and a second shaft sleeve; a first clamping plate isarranged on the shaft shoulder of the transmission shaft; a second clamping plate is arranged on an inner ring of the thrust ball bearing close to the shaft shoulder of the transmission shaft; an elastic part is arranged between the first clamping plate and the second clamping plate in a clamping mode; and the elastic part is pressed by force when the nut is tightly screwed. According to the pre-tightening device of coupled thrust ball bearings, the circular inclined section spring is adopted, the contact area is larger and elastic force is uniformed. During arranging, the spring is forced togenerate certain pre-compression by screwing the nut tightly in different degrees, and amount of clearance generated by abrasion of a rolling element and a roller path can be compensated automaticallyin virtue of a characteristic of automatic recovery of deformation of a spring.

Description

technical field [0001] The invention belongs to the technical field of clearance elimination and preloading of thrust ball bearings, and in particular relates to a paired thrust ball bearing preloading device using inclined section springs. Background technique [0002] Thrust ball bearings can bear both radial force and one-way axial force, and have a higher limit speed. When used to support the transmission shaft, they are often used in pairs, which requires a structure to eliminate clearance and apply preload, otherwise the transmission accuracy, support rigidity and bearing service life will be reduced. At present, the structure of the preloading device of paired thrust ball bearings is complicated, the adjustment is troublesome, and the automatic compensation is difficult after wear and tear. Contents of the invention [0003] In view of the foregoing problems, the purpose of the present invention is to propose a pair of thrust ball bearing pretensioning devices usin...

AI Technical Summary

Problems solved by technology

At present, the structure of the preloading device of paired thrust ball bearings is complicated, it is troublesome to adjust, and it is difficult to automatically compensate after wear and tear

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