Bearing for robot arm

Abstract

The invention discloses a bearing for a robot arm. The bearing comprises an inner ring, an outer ring arranged out of the inner ring in a sleeving manner and a spherical rolling body. Two parallel chutes are formed in the outer circumferential face of the inner ring and the inner circumferential face of the outer ring, the chutes of the inner ring and the chutes of the outer ring are formed oppositely, the rolling body is arranged between the chutes of the inner ring and the chutes of the outer ring, the axial sections of the chutes comprise first arcs and second arcs, the radiuses of curvature of which are greater than the radius of the rolling body, and the rolling body is in contact with the first and second arcs, so that the rolling body and the chutes have four contact points, and therefore, the bearing not only can bear the radial load, but also can bear the axial load, and the bearing load of the bearing is improved; one of the inner and outer ring is fixedly connected to a large arm of the robot while the other one is fixedly connected to small arm, and the rotating axis of the inner ring is deviated from the rotating axis of the outer ring, so that the moving track of theend part of the small arm is changed and the rotating area range between the small arm and the large arm is enlarged.

Description

technical field [0001] The invention relates to the technical field of robots, in particular to a bearing for a robot arm. Background technique [0002] With the rapid development of science and technology, the use of robots is becoming more and more common, and the design of the robot's arm structure and leg structure is particularly critical, especially the design of the joint positions of the robot's elbows and knees. In the prior art, the upper arm and the forearm of the robot arm are often rotationally connected through a connecting shaft, and the area formed by the rotation of the forearm relative to the forearm is a circle. When there are specific requirements for the rotation range of the forearm In this case, an additional eccentric assembly needs to be provided at the connection between the boom and the forearm for connection, the structure is complex, prone to failure, and the manufacturing cost will be increased. [0003] Therefore, how to solve the problem in t...

AI Technical Summary

Problems solved by technology

In the prior art, the upper arm and the forearm of the robot arm are often rotationally connected through a connecting shaft, and the area formed by the rotation of the forearm relative to the forearm is a circle. When there are specific requirements for the rotation range of the forearm , it is necessary to set an additional eccentric component at the connection between the boom and the forearm for connection, the structure is complex, prone to failure, and will increase the manufacturing cost

[0003] Therefore, how to solve the problem of the connection structure between the boom and the forearm in the prior art restricting the range of the forearm rotation area has become an important technical problem to be solved by those skilled in the art

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