Browse Publications Technical Papers 2019-01-1526
2019-06-05

Kinematic analysis of the double-roller tripod joint 2019-01-1526

The kinematic model of the double roller tripod joint is established in order to analyze its kinematic characteristics and provide theoretical basis for its application and improvement. By means of spatial coordinate transformation, the translational and rotational motion equations of the rollers relative to the tracks and trunions, the motion equation of the center of the tripod and the equations of the input/output angular displacement error and bending angle are derived. The results show that the rollers of the double roller tripod joint only have periodic translational motions relative to the tracks while the rollers have both periodic translations and rotation motions relative to the trunions. The tripod center rotates on the tripod plane with a speed three times of the input speed. The input/output angular displacement error and bending angle have volatility, and their fluctuating frequency are 3 times of the input rotational frequency. The double roller tripod joint is a quasi-constant-velocity joint whose rollers only do pure rolling motion in the tracks.

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