Constant torque compliant mechanisms produce an output torque that does not change in a large range of input rotation. They have wide applications in aerospace, automobile, timing, gardening, medical, and healthcare devices. Unlike constant force compliant mechanisms, the synthesis of constant torque compliant mechanisms has not been extensively investigated yet. In this paper, a method is presented for synthesizing constant torque compliant mechanisms that have coaxial input rotation and output torque. The same shaft is employed for both input rotation and output torque. A synthesized constant torque compliant mechanism is modeled as a set of variable width spline curves within an annular design domain formed between a rotation shaft and a fixed ring. Interpolation circles are used to define variable width spline curves. The synthesis of constant torque compliant mechanisms is systematized as optimizing the control parameters of the interpolation circles of the variable width spline curves. The presented method is demonstrated by the synthesis of constant torque compliant mechanisms that have different number of variable width spline curves in this paper.
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December 2016
Technical Briefs
Synthesis of Constant Torque Compliant Mechanisms
Hari Nair Prakashah,
Hari Nair Prakashah
Department of Mechanical Engineering,
Texas A&M University-Kingsville,
Kingsville, TX 78363
e-mail: hari.nair9@gmail.com
Texas A&M University-Kingsville,
Kingsville, TX 78363
e-mail: hari.nair9@gmail.com
Search for other works by this author on:
Hong Zhou
Hong Zhou
Department of Mechanical Engineering,
Texas A&M University-Kingsville,
Kingsville, TX 78363
e-mail: hong.zhou@tamuk.edu
Texas A&M University-Kingsville,
Kingsville, TX 78363
e-mail: hong.zhou@tamuk.edu
Search for other works by this author on:
Hari Nair Prakashah
Department of Mechanical Engineering,
Texas A&M University-Kingsville,
Kingsville, TX 78363
e-mail: hari.nair9@gmail.com
Texas A&M University-Kingsville,
Kingsville, TX 78363
e-mail: hari.nair9@gmail.com
Hong Zhou
Department of Mechanical Engineering,
Texas A&M University-Kingsville,
Kingsville, TX 78363
e-mail: hong.zhou@tamuk.edu
Texas A&M University-Kingsville,
Kingsville, TX 78363
e-mail: hong.zhou@tamuk.edu
Manuscript received May 22, 2016; final manuscript received September 26, 2016; published online October 25, 2016. Assoc. Editor: Larry L Howell.
J. Mechanisms Robotics. Dec 2016, 8(6): 064503 (8 pages)
Published Online: October 25, 2016
Article history
Received:
May 22, 2016
Revised:
September 26, 2016
Citation
Nair Prakashah, H., and Zhou, H. (October 25, 2016). "Synthesis of Constant Torque Compliant Mechanisms." ASME. J. Mechanisms Robotics. December 2016; 8(6): 064503. https://doi.org/10.1115/1.4034885
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