RESEARCH PAPERS: Gearing and Power Transmission Papers

Kinematic Precision of Gear Trains

[+] Author and Article Information
F. L. Litvin, R. N. Goldrich

University of Illinois at Chicago Circle, Chicago, Ill. 60680

J. J. Coy

Propulsion Laboratory, AVRADCOM Research and Technology Labs, NASA, Lewis Research Center, Cleveland, Ohio 44135

E. V. Zaretsky

NASA, Lewis Research Center, Cleveland, Ohio 44135

J. Mech., Trans., and Automation 105(3), 317-326 (Sep 01, 1983) (10 pages) doi:10.1115/1.3267363 History: Received August 25, 1982; Online November 19, 2009


Kinematic precision is affected by errors which are the result of either intentional adjustments or accidental defects in manufacturing and assembly of gear trains. This paper explains a general method for the determination of kinematic precision of gear trains. The general method is based on the exact kinematic relations for the contact point motions of the gear tooth surfaces under the influence of errors. An approximate method is also explained. Example applications of the general and approximate methods are demonstrated for gear trains consisting of involute (spur and helical) gears, circular-arc (Wildhaber-Novikov) gears, and spiral-bevel gears. Gear noise measurements from a helicopter transmission are presented and discussed with relation to the kinematic precision theory.

Copyright © 1983 by ASME
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