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RESEARCH PAPERS

Kinematic Properties of Tripode (Tri-pot) Joints

[+] Author and Article Information
Metin M. Durum

Borg-Warner Corp., Roy C. Ingersoll Research Center, Des Plaines, Ill.

J. Eng. Ind 97(2), 708-713 (May 01, 1975) (6 pages) doi:10.1115/1.3438636 History: Received July 03, 1974; Online July 15, 2010

Abstract

The geometry of tripode (also called tri-pot) joints or shaft couplings is simplified by folding one side onto the other, and the kinematic properties are obtained. Due to a built-in orbital motion, a tripode joint cannot be used alone between two shafts of fixed axes; therefore it cannot directly be compared with a typical CV (constant-velocity) joint. Yet it is shown that: (a ) if its shafts are kept parallel to a fixed plane a tripode joint transmits equal rotations as other CV joints do; (b ) if one shaft axis is fixed and the other shaft axis has a fixed point, input and output angular velocities slightly differ, with a cycle of three times shaft speed; (c ) to transmit rotation between two shafts of fixed axes, a tripode joint must be incorporated with another tripode or CV joint or a mechanism. In this case deviation between input and output angular velocities can be made very small or even nil.

Copyright © 1975 by ASME
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