Bearing, swing bearing, and swing bearing device for reciprocating motion

Abstract

A combination bearing, a swing bearing, and a swing bearing device for reciprocating motion are disclosed. An outer bearing ring and an inner bearing ring having a coaxial center of sphere with the outer bearing ring are included, a plurality of rows of balls can be configured in such a manner that at least two rows of balls are arranged on the left and right in the axial direction across the center of sphere in the radial direction, retainers are included, the inner bearing ring forms a ring-shaped outer ball raceway surface, a channel and a concave-convex part are formed on the left axial end face and the right axial end face of the circular ring thereof, and the outer bearing ring is divided into a cover-shaped left outer ring and a cover-shaped right outer ring to form a three-stage step with an L-shaped cross section. The left outer bearing ring and the right outer bearing ring are combined to form a ring-ball inner cavity raceway surface with a ring-ball-shaped space with the inner diameter larger than the outer diameter of the inner bearing ring as a first step, and the second step of the left outer bearing ring and the second step of the right outer bearing ring form a ring-ball-shaped inner ball raceway surface with the inner diameter the same as the outer diameter of the inner bearing ring. The third step forms an annular limiting part, the multiple rows of rolling bodies can be arranged between the outer ball raceway surface and the inner cavity raceway surface and between the left axial end face and the right axial end face of the inner ring and the annular limiting part in a rolling mode in the state that the multiple rows of rolling bodies are kept by the axially-distributed retainers, and the annular inner ball raceway surfaces of the left outer bearing ring and the right outer bearing ring are in sliding fit with the outer ball raceway surface.

Description

[0001] This application is a divisional application. The application number of the original application is: 202010821664.X, and the application date is August 15, 2020. The divisional application number for the invention titled "A Rolling Joint Bearing with Angular Motion Freedom" is : 202110657765.2, the title of the invention is "Bearing, and angular deflection controllable yaw bearing, and bearing device for wheels" technical field [0002] The invention relates to the technical field of combined bearings, which are used in general machinery, in particular to a swing bearing, and to a swing bearing device for reciprocating motion. The invention also relates to a machine tool using the swing bearing device. Background technique [0003] Most of the combined bearings are used as a support shaft, which can guide the rotation of the shaft and also be a mechanical part that can bear the force transmitted from the shaft. [0004] Combined bearings are used in general machinery,...

AI Technical Summary

Problems solved by technology

Similarly, when doing work, the inner ring of the oscillating bearing rotates to drive the outer ring to swing. Under the reaction force, the balls roll in the raceway groove in the turning gap between the inner ring and the outer ring, and the friction on both sides of the inner and outer ring grooves is relatively large. The raceway of the inner ring is inclined to drive the outer edge of the raceway groove, and the design and production cost is high

[0007] Therefore, under the requirements of high performance, high precision, long life and high speed, heavy load and complex dynamic load environment, when the fatigue wear of the oscillating bearing fails, adaptive adjustment cannot be made to prolong the life. The positive contact between the ring and the rolling element has outstanding advantages, and the existing swing bearing structure still needs to be improved

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