Kinematic and Static Force Analysis of Rocker-Pin Jointed Silent Chains with Involute Sprockets

[+] Author and Article Information
N. K. Bucknor

GM NAO R&D Center, Warren, MI 48090

F. Freudenstein

Columbia University, New York, NY 10027

J. Mech. Des 116(3), 842-848 (Sep 01, 1994) (7 pages) doi:10.1115/1.2919458 History: Received June 01, 1993; Revised February 01, 1994; Online June 02, 2008


A quasi-static model has been developed for a silent (inverted-tooth) chain drive incorporating a rocker-pin-jointed chain and involute-toothed sprockets. The kinematic effects of rocker-pin clearances and link/sprocket engagement are modeled and the influence of various model parameters on the chain drive torque-ratio variation, due to chordal action, is examined. In some cases, this variation is found to be less than that for equivalent pin-jointed chain drives. Additionally, the center distances corresponding to the maximum and minimum torque variation are not fixed, as in the case of a pin-joined chain. An optimization method is used in determining the governing geometric constrains as multiple joint configurations can occur, given the rocker-pin joint clearances. The resulting system of equations is fully constrained for a physically consistent chain configuration.

Copyright © 1994 by The American Society of Mechanical Engineers
Topics: Force , Chain
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