Bearing inner ring and full-ball bearing

Abstract

The invention provides a bearing inner ring and a full-ball bearing. The full-ball bearing comprises a ball, the bearing inner ring and a bearing outer ring, wherein the axes of the bearing inner ring and the bearing outer ring extend left and right. The bearing inner ring is provided with a flat outer circumferential face used for being in rolling fit with the ball, and the diameter of the flat outer circumferential face is unchanged in the axial direction. An inner circumferential face of the bearing outer ring is provided with an arc rolling track which is in rolling fit with the ball and protrudes outwards in the radial direction. Thus, the groove curvature of the bearing inner ring is almost infinite and far higher than that of the arc rolling track of the bearing outer ring, friction caused by differential sliding is eliminated, and frictional torque is reduced. The bearing inner ring is free of channels, so that the machining difficulty and machining cost of the bearing inner ring are effectively reduced. Meanwhile, when rotating at high speed, the ball moves outwards in the radial direction under centrifugal force and is tightly attached to the arc rolling track on the inner circumferential face of the bearing outer ring, the arc face of the arc rolling track limits the ball in the axial direction, it is ensured that the ball rotates stably, and bearing stability is improved.

Description

technical field [0001] The invention relates to the field of bearings, in particular to a bearing inner ring and a full ball bearing. Background technique [0002] Among the ball bearings, there is a full ball bearing with a special structure. Its structural feature is that the bearing has no cage, and ball filling gaps are designed on the inner and outer rings, so it can hold more balls than ordinary deep groove ball bearings. Since this kind of bearing has no friction between the cage, the ring and the rolling body, the friction torque is small, and the sensitivity is high, it is widely used in the flight attitude and direction control systems of aerospace, aviation and navigation devices. Since the full ball bearing has a large number of balls, in order to fit all the balls into the bearing, this kind of bearing needs to design ball filling gaps on the inner and outer rings. Although the ball filling gap can be filled with balls, it has a great influence on the structure...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a full ball bearing to solve the problem of poor stability and easy damage of the inner ring caused by the curvature of the raceway groove of the inner ring of the bearing in the prior art being smaller than the curvature of the raceway groove of the outer ring; at the same time , the present invention also provides a bearing inner ring used in the full ball bearing

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