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The Orbitless Drive

[+] Author Affiliations
Leo Stocco

University of British Columbia, Vancouver, BC, Canada

Paper No. IMECE2016-65253, pp. V014T07A020; 10 pages
  • ASME 2016 International Mechanical Engineering Congress and Exposition
  • Volume 14: Emerging Technologies; Materials: Genetics to Structures; Safety Engineering and Risk Analysis
  • Phoenix, Arizona, USA, November 11–17, 2016
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5068-8
  • Copyright © 2016 by ASME


A fixed low-ratio Epicyclic drive is developed that resembles a Planetary drive but has crank-shaft pinions and an additional carrier replacing its ring gear. It provides half the reduction ratio of a Planetary drive with similar pinions, making reduction ratios at or near 2:1 practical. It shares many properties with a Planetary drive such as torque splitting and co-axial drive shafts that spin in a common direction but with no ring gear, reverse bending, or assembly criteria. It has many optional configurations and modes, does not slip or jam, is easily back-driven, has low pitch and bearing velocities, and favorable churning properties. It is a viable option for both reduction and overdrive applications that promises low noise / vibration / harshness (NVH) levels.

Copyright © 2016 by ASME



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