A curved flexure element such as an initially-curved beam can deflect largely and facilely. Using curved flexure elements in compliant mechanisms allows the mechanism to move a longer distance or undergo a larger rotation angle stroke than using conventional notch flexures. This paper presents a novel large-deflection annulus-shaped flexure hinge covering multiple curved-beam flexure elements. It has been shown that geometric symmetry in the constraint arrangement relaxes some of the design tradeoffs, resulting in some improved performances of the flexure hinge. Additional fixed RCM characteristic of isosceles-trapezoidal flexure modules existed in this compliant joint further improve its accuracy. A master-motion pseudo-rigid-body model provides a simple and accurate method to analyze the force-deflection behavior of this new rotary flexure hinge. The accuracy of the model is verified by comparing outcomes to non-linear finite element analysis. The result shows the proposed rotary flexure hinge has a large stroke angle, a low axial and radial stiffness.
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ASME 2008 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
August 3–6, 2008
Brooklyn, New York, USA
Conference Sponsors:
- Design Engineering Division and Computers in Engineering Division
ISBN:
978-0-7918-4326-0
PROCEEDINGS PAPER
A Large-Deflection Annulus-Shape Flexure Hinge Based on Curved Beams Available to Purchase
Shanshan Zhao,
Shanshan Zhao
Beihang University, Beijing, China
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Shusheng Bi,
Shusheng Bi
Beihang University, Beijing, China
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Minglei Sun,
Minglei Sun
Beihang University, Beijing, China
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Guanghua Zhong
Guanghua Zhong
Beihang University, Beijing, China
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Shanshan Zhao
Beihang University, Beijing, China
Shusheng Bi
Beihang University, Beijing, China
Jingjun Yu
Beihang University, Beijing, China
Minglei Sun
Beihang University, Beijing, China
Guanghua Zhong
Beihang University, Beijing, China
Paper No:
DETC2008-49693, pp. 249-255; 7 pages
Published Online:
July 13, 2009
Citation
Zhao, S, Bi, S, Yu, J, Sun, M, & Zhong, G. "A Large-Deflection Annulus-Shape Flexure Hinge Based on Curved Beams." Proceedings of the ASME 2008 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 2: 32nd Mechanisms and Robotics Conference, Parts A and B. Brooklyn, New York, USA. August 3–6, 2008. pp. 249-255. ASME. https://doi.org/10.1115/DETC2008-49693
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