In this paper, a new criterion for the design of a drag-link mechanism with optimum transmission angle is established. The transmission angle, the angle between the coupler link and output link of a four-bar linkage, is considered to be optimized when its extreme values deviate equally from 90 deg. Based on this criterion, design equations and design charts are developed. It is shown that the optimum drag-link mechanism is a turning-block linkage. It is also shown that to displace the drag-link mechanism with optimum transmission angle from its minimum lag to its maximum lag position, the input link must always rotate 180 deg and the corresponding angular displacement of the output link depends only on the link-length ratio of the output link to the fixed-link.
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June 1983
This article was originally published in
Journal of Mechanisms, Transmissions, and Automation in Design
Research Papers
Design of Drag-Link Mechanisms With Optimum Transmission Angle
Lung-Wen Tsai
Lung-Wen Tsai
Mechanical Research Department, General Motors Research Laboratories, Warren, Mich. 48090
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Lung-Wen Tsai
Mechanical Research Department, General Motors Research Laboratories, Warren, Mich. 48090
J. Mech., Trans., and Automation. Jun 1983, 105(2): 254-258 (5 pages)
Published Online: June 1, 1983
Article history
Received:
March 26, 1982
Online:
November 19, 2009
Citation
Tsai, L. (June 1, 1983). "Design of Drag-Link Mechanisms With Optimum Transmission Angle." ASME. J. Mech., Trans., and Automation. June 1983; 105(2): 254–258. https://doi.org/10.1115/1.3258518
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