This paper presents elliptical rolling contact joints as an alternative to circular rolling contact and conventional revolute joints where high quality force transmission—low friction and backlash—with variable output are desired. Parameters specific to the joint and its position are defined in terms of relative link angles and elliptical surface geometry. These relationships allow elliptical rolling contact joints to be incorporated in vector loop summations used in kinematic analysis. Notably, elliptical rolling contact is developed as the more general case of which circular rolling contact is a subset. Elliptical rolling contact joints are shown to offer several benefits over circular rolling contact, including: reduced Hertz contact stresses, variable output velocity, maximum use of contact interface by distributing small rotations across surfaces of small curvature, reduced forces on constraining members, and no-slip pure rolling provided exclusively by connecting links (or flexures) without the need for gear teeth or friction.
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ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
August 30–September 2, 2009
San Diego, California, USA
Conference Sponsors:
- Design Engineering Division and Computers in Engineering Division
ISBN:
978-0-7918-4904-0
PROCEEDINGS PAPER
Analysis of Elliptical Rolling Contact Joints in Compression
Jacob R. Montierth,
Jacob R. Montierth
Ford Motor Company, Dearborn, MI
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Robert H. Todd,
Robert H. Todd
Brigham Young University, Provo, UT
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Larry L. Howell
Larry L. Howell
Brigham Young University, Provo, UT
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Jacob R. Montierth
Ford Motor Company, Dearborn, MI
Robert H. Todd
Brigham Young University, Provo, UT
Larry L. Howell
Brigham Young University, Provo, UT
Paper No:
DETC2009-87447, pp. 585-594; 10 pages
Published Online:
July 29, 2010
Citation
Montierth, JR, Todd, RH, & Howell, LL. "Analysis of Elliptical Rolling Contact Joints in Compression." Proceedings of the ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 7: 33rd Mechanisms and Robotics Conference, Parts A and B. San Diego, California, USA. August 30–September 2, 2009. pp. 585-594. ASME. https://doi.org/10.1115/DETC2009-87447
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