Work

Design and analysis of a two-stage constant-torque flexure hinge (TS-CTFH) based on fixed-rotation constrained circular-arc segments

Year: 2025

Type: article

Abstract: This study proposes a pseudo-rigid-body model (4bar-PRBM) for a fixed-rotation constrained circular-arc flexible segment and obtains characteristic parameters expressions using s as a variable. Then, the superposition principle of circular-arc segments is proposed, leading to the development of a novel two-stage constant-torque flexure hinge (TS-CTFH). With the dimension parameter s as a variable, TS-CTFH with different constant-torque output ( T id1 and T id2 ) is optimized, which enhances the applicability of the hinge. The accuracy of theoretical analysis and the feasibility of the design scheme are ultimately validated through finite-element analysis (FEA) and testing. The novel TS-CTFH offers a proficient solution for design of grippers, joint rehabilitation devices, and assistive aids for human activities. Simultaneously, the four-bar PRBM offers a user-friendly tool for designing compliant constant-torque mechanisms (CCTMs) with circular-arc segments.

Source: Mechanical sciences

DOI: 10.5194/ms-16-227-2025

Authors: Chongxiang Li, Lifang Qiu, Yue Yu, Cuiying Jiang, Shenyuan Dai

Institutions: University of Science and Technology Beijing, Aviation Industry Corporation of China (China), AviChina Industry & Technology (China), China Academy of Space Technology

Language: English

Topic: Robotic Mechanisms and Dynamics

Subfield: Control and Systems Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: gold

Estimated APC paid: $765