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RESEARCH PAPERS: Power Transmission and Gearing

A Unified Approach to the Assembly Condition of Epicyclic Gears

[+] Author and Article Information
P. A. Simionescu

Politehnica University of Bucharest, Dept. of Mechanism and Robot Theory, Spl. Independentei 313, Bucharest 77206, Romania

J. Mech. Des. 120(3), 448-452 (Sep 01, 1998) (5 pages) doi:10.1115/1.2829172 History: Received February 01, 1997; Revised April 01, 1997; Online December 11, 2007

Abstract

The paper gives a general method for determining the assembly condition of epicyclic gears, irrespective of the structure or gear type. According to the method, an associated mechanism is considered, having a single arm carrier and a split planet. The assembly condition of the gear train is satisfied when obtaining identical superposition of the teeth of the two half-planets after rotating the arm to the next position. By writing simple kinematic relations between some partial transmitting ratios, general formulae are obtained which can be applied to specific epicyclic gear sets as functions of teeth numbers. The same approach allows the determination of the necessary angles between the arms of the carrier, or the offset angles between the wheels of the compound planets, as alternative solutions for the case in which equidistant assembly of identical planets is not possible.

Copyright © 1998 by The American Society of Mechanical Engineers
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