Analysis of Approximate Four-Bar Straight-Line Mechanisms

[+] Author and Article Information
D. Tesar

University of Florida, Gainesville, Fla.

J. P. Vidosic

School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Ga.

J. Eng. Ind 87(3), 291-296 (Aug 01, 1965) (6 pages) doi:10.1115/1.3670818 History: Received July 07, 1964; Online December 08, 2011


Four-bar linkages possess many unique advantages as straight-line mechanisms. Formulations involving linkage geometry and curvature theory are developed to yield the lengths of the approximate straight line for specified accuracies. Design data such as link dimensions, transmission angles, and crank rotation angles are also obtained. Classical mechanisms including the Watt, Evans, Chebychev, and Roberts types are analyzed and compared. More detailed data, including a design data chart, are presented for linkages based on a Ball-double Burmester point.

Copyright © 1965 by ASME
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