This paper explores the development and performance of new constant-force compliant mechanisms that involve the addition of a translational spring element to slider-crank constant force mechanisms. The translational spring element has the additional requirement that, similar to a slider, it resists off-axis loads sufficiently to permit translation along only one axis. Geometric and energy storage parameters have been determined by optimization for five classes of mechanisms. The results of the optimization are values for geometric and energy storage parameters for each mechanism class for various levels of the translational spring parameter and various levels of constant-force behavior. The new configurations experience decreasing performance with increasing translational spring stiffness. The potential to implement a translational spring that also acts as a slider link provides the motivation for the new configurations. Such a spring would have the potential to completely remove friction from the mechanism and provide a constant-force solution that could replace current solutions such as hydraulic or pneumatic devices. The new configurations also have the potential to be manufactured as one piece or in layers, opening up new arenas for compressive constant-force mechanisms. Prototyping and testing of one of the new configurations are included as an example to demonstrate the use of the behavioral model.
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ASME 2004 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
September 28–October 2, 2004
Salt Lake City, Utah, USA
Conference Sponsors:
- Design Engineering Division and Computers and Information in Engineering Division
ISBN:
0-7918-4695-4
PROCEEDINGS PAPER
Crank-Slider With Spring Constant Force Mechanism Available to Purchase
Bart D. Frischknecht,
Bart D. Frischknecht
Brigham Young University, Provo, UT
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Larry L. Howell,
Larry L. Howell
Brigham Young University, Provo, UT
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Spencer P. Magleby
Spencer P. Magleby
Brigham Young University, Provo, UT
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Bart D. Frischknecht
Brigham Young University, Provo, UT
Larry L. Howell
Brigham Young University, Provo, UT
Spencer P. Magleby
Brigham Young University, Provo, UT
Paper No:
DETC2004-57318, pp. 809-817; 9 pages
Published Online:
June 27, 2008
Citation
Frischknecht, BD, Howell, LL, & Magleby, SP. "Crank-Slider With Spring Constant Force Mechanism." Proceedings of the ASME 2004 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 2: 28th Biennial Mechanisms and Robotics Conference, Parts A and B. Salt Lake City, Utah, USA. September 28–October 2, 2004. pp. 809-817. ASME. https://doi.org/10.1115/DETC2004-57318
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