This paper addresses similarities between various nutating or wobbling mechanisms, in particular kinematic similarities. A case is made for the generalization of these mechanisms into a mechanism “class” having common kinematic characteristics, which is typified by bevel epicyclic gear trains. A similarity index is proposed to describe the quality of kinematic similarity, with the best degree of similarity termed “equivalence.” It is proposed that kinematic analysis of mechanisms belonging to this “class” can be simplified by modeling them as bevel-gear trains, and that static-force, power-flow, and efficiency analyses can also be greatly simplified in the case of “equivalent” mechanisms. Simplified kinematic, force, and efficiency analyses are demonstrated for a unique wobbling speed reducer using this new concept of equivalent geared mechanisms.
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e-mail: carln@purdue.edu
e-mail: cipra@ecn.purdue.edu
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March 2005
Article
Similarity and Equivalence of Nutating Mechanisms to Bevel Epicyclic Gear Trains for Modeling and Analysis
Carl A. Nelson,
e-mail: carln@purdue.edu
Carl A. Nelson
School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907-2088
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Raymond J. Cipra
e-mail: cipra@ecn.purdue.edu
Raymond J. Cipra
School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907-2088
Search for other works by this author on:
Carl A. Nelson
School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907-2088
e-mail: carln@purdue.edu
Raymond J. Cipra
School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907-2088
e-mail: cipra@ecn.purdue.edu
Contributed by the Mechanisms and Robotics Committee for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received August 9, 2003; revised April 22, 2004. Associate Editor: S. G. K. Anathasuresh.
J. Mech. Des. Mar 2005, 127(2): 269-277 (9 pages)
Published Online: March 25, 2005
Article history
Received:
August 9, 2003
Revised:
April 22, 2004
Online:
March 25, 2005
Citation
Nelson, C. A., and Cipra, R. J. (March 25, 2005). "Similarity and Equivalence of Nutating Mechanisms to Bevel Epicyclic Gear Trains for Modeling and Analysis ." ASME. J. Mech. Des. March 2005; 127(2): 269–277. https://doi.org/10.1115/1.1829068
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