Performance Criteria for High-Speed Crank-and-Rocker Linkages—Part I: Plane Crank-and-Rocker Linkages

[+] Author and Article Information
H. Funabashi

Department of Mechanical Engineering, Tokyo Institute of Technology, Meguro, Tokyo, Japan

F. Freudenstein

Department of Mechanical Engineering, Columbia University, New York, N.Y.

J. Mech. Des 101(1), 20-25 (Jan 01, 1979) (6 pages) doi:10.1115/1.3454019 History: Received June 19, 1978; Online October 21, 2010


Criteria are given for evaluating the performance and determining the dimensions of plane crank-and-rocker mechanisms suitable for operation at high speeds. In contrast to the classical procedure of simulating the acceleration pattern of the slider-crank mechanism by means of centric crank-and-rocker linkages, a family of crank-and-rocker linkages has been found, with a more nearly sinusoidal acceleration pattern, i.e., one which tends more nearly to simulate the acceleration variation of a scotch yoke. At the same time the transmission-angle variation and the ratio of minimum to maximum link lengths is controlled. A pocket-calculator procedure is described and illustrated by means of a numerical example.

Copyright © 1979 by ASME
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