Synthesis of a torsional spring mechanism with mechanically adjustable stiffness using wrapping cams

Date

2012-11-01

Author

KILIÇ, Mehmet
Yazıcıoğlu, Yiğit
Kurtuluş, Dilek Funda

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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Most adjustable springs that have appeared in the literature are based on the antagonistic actuation of two quadratic springs. When two quadratic springs are coupled antagonistically, the resulting system attains a linear spring behavior enabling the adjustment of the stiffness mechanically. However, a non-linear spring with perfect quadratic behavior is difficult to realize. In this study, the synthesis of a non-linear spring using mechanisms is investigated where the problem is reduced to a function generation problem. A wrapping cam mechanism is proposed as an effective mechanism to be used in non-linear spring synthesis. An analytical solution is developed to calculate the necessary cam profile. Later, the design of the wrapping cam mechanism specific to quadratic springs is investigated. A torsional spring with mechanically adjustable stiffness utilizing a wrapping cam mechanism has been designed, manufactured and experimentally tested. Strong linear behavior is observed and the experimental stiffness values are found to be in good agreement with the analytical solution.

Subject Keywords

Non-linear springs, Wrapping cams, Function generation, Adjustable stiffness, Antagonistic actuation

URI

https://hdl.handle.net/11511/36967

Journal

MECHANISM AND MACHINE THEORY

DOI

https://doi.org/10.1016/j.mechmachtheory.2012.06.005

Collections

Department of Mechanical Engineering, Article

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Citation Formats

M. KILIÇ, Y. Yazıcıoğlu, and D. F. Kurtuluş, “Synthesis of a torsional spring mechanism with mechanically adjustable stiffness using wrapping cams,” MECHANISM AND MACHINE THEORY, pp. 27–39, 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/36967.