Rolling bearing cage and deep groove ball bearing with eccentric arc structure

Abstract

The invention discloses a rolling bearing cage with an eccentric arc guide surface and a deep groove ball bearing. The deep groove ball bearing includes an outer ring, an inner ring, a plurality of rolling bodies and a cage. The pocket of the cage has a straight face and an arc surface, and the axis of the cylinder corresponding to the straight face is perpendicular to the rotation axis of the cage; the arc face is connected to the inner diameter side of the straight face and extends toward the inner diameter side; the rolling elements and the cage are opposite When moving, the straight surface is not in contact with the rolling element surface, and the arc surface is in contact with the rolling element surface; there are multiple sphere centers corresponding to the arc surface, and the multiple sphere centers do not overlap. The eccentric structure of the pocket prevents the rolling body from contacting the bottom of the pocket when rolling, but only contacts with the arc surface, thereby effectively avoiding wear on the bottom of the pocket, and while improving the motion stability of the cage, it reduces the size of the rolling bearing. The vibration is beneficial to prolong the service life of rolling bearings.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a rolling bearing cage with an eccentric arc guide surface. Background technique [0002] The cages in rolling bearings are roughly divided into two types, one is the cage guided by the bearing ring, and the other is the cage guided by the rolling elements. Considering the reliability and assembly of the bearing cage, a double half riveted copper cage is usually used. At present, there are four main categories of double-half riveted copper cages: complete straight pockets, complete arc pockets, straight pockets plus oblique pockets, straight pockets plus arc pockets, completely straight pockets and straight pockets. Pocket holes and oblique pocket holes are beneficial to lubrication, but there is no arc pocket hole to guide the rolling element well, and the vibration is greater; complete arc pocket hole guides well, but it is not conducive to lubrication, so straight pocket hol...

AI Technical Summary

Problems solved by technology

[0003] However, the design of straight pockets and arc pockets has disadvantages. When the rolling elements sag, they all fall on the bottom of the arc pockets of the cage. When rotating at high speed, the cage moves toward the outer ring of the bearing under the action of centrifugal force. The bottom of the arc pocket of the cage collides with the rolling elements. Because the bottom of the arc pocket is very thin and prone to stress concentration, it causes abnormal wear of the cage and scratches on the rolling elements. At the same time, copper cuttings are mixed into the grease, causing rolling of the inner and outer rings Scratches on the road surface increase the noise of the bearing and reduce the life of the bearing

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