RESEARCH PAPERS: Mechanisms and Design Automation Papers

Equations for Four-Bar Line-Envelopes

[+] Author and Article Information
K. H. Hunt

Department of Mechanical Engineering, Monash University, Clayton, Victoria, Australia

E. F. Fichter

Department of Industrial and General Engineering, Oregon State University, Corvallis, Ore.

J. Mech. Des 103(4), 743-749 (Oct 01, 1981) (7 pages) doi:10.1115/1.3254981 History: Received June 01, 1980; Online November 17, 2009


A line-equation (in tangential coordinates) is derived for the envelope of a general straight line attached to the coupler of a planar hinged four-bar linkage. Since a line can be identified with an axis of relative translation parallel to a sliding joint, the study of how lines move in a mechanism has practical potential. Nevertheless the emphasis here is on the geometry of the line-envelopes, and some envelopes are plotted both as samples of what can be obtained and to exemplify some of the properties which they possess. Towards the end of the paper all the other forms of planar four-bar linkage, namely those in which one or two sliding joints replace hinges, are examined, and their envelope-equations are presented.

Copyright © 1981 by ASME
Your Session has timed out. Please sign back in to continue.






Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In