7-channel double offset cardan joint

Abstract

The invention relates to a seven-channel double offset type universal joint which consists of a cylindrical shell, a transmission shaft, an eccentric retainer, a plurality of steel balls, an inner race housing, a snap spring and an elastic collar. The number of the steel balls is seven, the number of openings of the eccentric retainer is seven, the number of the corresponding channels of the cylindrical shell and the inner race housing is also seven, the inner race housing is installed in the eccentric retainer, the seven channels of the cylindrical shell and the inner race housing are respectively corresponding to seven openings of the eccentric retainer, the steel balls are positioned in the seven channels of the inner race housing and the cylindrical shell, the inner race housing is installed on the transmission shaft by a spline and is axially positioned by a spring collar, the end edge of an inner bore of the cylindrical shell is provided with a snap spring groove which is internally provided with the snap spring. Compared with a traditional specific offset type universal joint, the carrying capacity of the seven-channel double offset type universal joint disclosed in the invention is increased, and rated load is raised by 16%; meanwhile, the phenomenon that eight steel balls are difficult to arrange can be avoided.

Description

Technical field: [0001] The present invention relates to a slip type constant velocity universal joint, more specifically to a seven channel double offset universal joint capable of transmitting motion and torque when the main and driven shafts have angular displacement and axial displacement at the same time to the knot. Background technique: [0002] In the prior art, the number of steel balls in the double-offset universal joint of the traditional structure is 6, and there are 6 corresponding cylindrical shells and star sleeve channels. There is also a double-offset universal joint with 8 steel balls and 8 corresponding bell-shaped shells and star-shaped sleeve channels. The use shows that it has the following shortcomings: [0003] (1) The six-channel double-offset universal joint of the traditional structure has a small number of steel balls due to the number of six, and its internal space is not fully utilized, and its bearing capacity is low and its rated load is sma...

AI Technical Summary

Problems solved by technology

[0003] (1) The six-channel double-offset universal joint of the traditional structure has a small number of steel balls due to the number of six, and its internal space is not fully utilized, the bearing capacity is low, and the rated load is small

[0004] (2) In order to improve its bearing capacity, the eight-channel double-offset universal joint came out. Due to the needs of space layout, this kind of eight-channel double-offset universal joint can only use smaller steel balls. It can not significantly improve the bearing capacity, but narrows the cylindrical shell and the star-shaped sleeve channel beam, and the parts are easily damaged

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