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A novel design of a high-performance flexure hinge with reverse parallel connection multiple-cross-springs
Shaoyang Du1, Jiangnan Liu1, Hezhe Bu1
1State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha 410082, China.
The Review of Scientific Instruments
|April 9, 2020
Summary
A novel Reverse Parallel Multiple-Cross-Spring (RPMCS) flexure hinge design minimizes axis drift and warping. This innovation enhances rotational stiffness and accuracy, outperforming traditional designs.
Area of Science:
- Mechanical Engineering
- Precision Engineering
Background:
- Traditional cross-spring flexure hinges suffer from axis drift and warping due to leaf spring deformation.
- These issues lead to significant rotation errors in precision mechanisms.
Purpose of the Study:
- To introduce a novel flexure hinge design that restrains axis drift and warping.
- To evaluate the rotational performance and stability of the new design under various conditions.
Main Methods:
- A Reverse Parallel Multiple-Cross-Spring (RPMCS) flexure hinge was designed based on principles of merging, symmetry, and dimensional adaptation.
- Experimental and simulation analyses were conducted on the RPMCS-3 flexure hinge model.
Main Results:
- The RPMCS flexure hinge demonstrated nearly constant rotational stiffness under driving torque.
- Relative rotation error was stabilized within 10%, with simulations showing quasi-zero axis drift.
- The hinge exhibited superior anti-interference performance compared to existing flexure hinges.
Conclusions:
- The RPMCS flexure hinge effectively mitigates axis drift and warping, improving rotational accuracy and stability.
- This design offers enhanced performance for applications requiring precise rotational control.
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