Cross-Spring Flexural Pivot (CSFP) has some advantages compared with rigid bearing. However, this kind of flexural pivot is limited in the field of precision positioning due to its small motion stroke, large axis drift, and sensitivity to temperature, etc. In this paper, topology structures of the CSFP were analyzed through defining different geometric parameters λ, spring crossing angle α, and spring number N. Characteristics of stiffness, axis drift, maximum stress, and temperature drift were compared and summarized by the Finite Element Analysis (FEA). Ultimately, a class of flexural pivots, called Inner and Outer Ring Flexural Pivots (IORFP), were selected for their excellent comprehensive performances. This type of flexural pivots has some significant advantages, such as large stroke, approximate zero axis drift and no temperature drift. Finally, the stiffness characteristic of IORFP with different geometrical parameters λ was compared by FEA, and law of stiffness variation was obtained. When λ is 0.1273, the IORFP has linear stiffness characteristics.
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ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
August 17–20, 2014
Buffalo, New York, USA
Conference Sponsors:
- Design Engineering Division
- Computers and Information in Engineering Division
ISBN:
978-0-7918-4636-0
PROCEEDINGS PAPER
Research of Performance Comparison of Topology Structure of Cross-Spring Flexural Pivots
Hongzhe Zhao,
Hongzhe Zhao
Beihang University, Beijing, China
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Shusheng Bi,
Shusheng Bi
Beihang University, Beijing, China
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Jingjun Yu
Jingjun Yu
Beihang University, Beijing, China
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Lang Liu
Beihang University, Beijing, China
Hongzhe Zhao
Beihang University, Beijing, China
Shusheng Bi
Beihang University, Beijing, China
Jingjun Yu
Beihang University, Beijing, China
Paper No:
DETC2014-34006, V05AT08A025; 11 pages
Published Online:
January 13, 2015
Citation
Liu, L, Zhao, H, Bi, S, & Yu, J. "Research of Performance Comparison of Topology Structure of Cross-Spring Flexural Pivots." Proceedings of the ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 5A: 38th Mechanisms and Robotics Conference. Buffalo, New York, USA. August 17–20, 2014. V05AT08A025. ASME. https://doi.org/10.1115/DETC2014-34006
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