Synthesis of Wrapping Cams

[+] Author and Article Information
P. H. Tidwell, N. Bandukwala, S. G. Dhande, C. F. Reinholtz

Department of Mechanical Engineering, Virginia Polytechnic Institute & State University, Blacksburg, VA 24061

G. Webb

Nautilus, P. O. Drawer 708, Independence, VA 24348

J. Mech. Des 116(2), 634-638 (Jun 01, 1994) (5 pages) doi:10.1115/1.2919425 History: Received October 01, 1992; Revised April 01, 1993; Online June 02, 2008


This paper describes a technique for synthesizing a force-generating mechanism composed of a cam wrapped by a belt or chain. Such mechanisms will hereafter be referred to as “wrapping cams.” Synthesis methods for two configurations of this mechanism are presented. In the simplest case, the cam is wrapped by a belt or chain under constant tensile force, producing a nonlinear torque at the cam. In the second case, the cam is under constant torque, producing a nonlinear belt or chain force. While wrapping cams are far less common than cams that generate specified follower displacement functions, applications for wrapping cams exist in counter-balancing mechanisms, exercise equipment, and process machines.

Copyright © 1994 by The American Society of Mechanical Engineers
Topics: Cams
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