Displacement Analysis of Planar Link Mechanisms with Large-Deflective Elastic Hinges (Proposal of Self-Equilibrium Convergence Method and Its Application to Parallel Spring Mechanism)

摘要

As an effective method to eliminate friction and the need to lubricate between the pairs in the link mechanism, revolute pairs are replaced with large-deflective elastic hinges. In this paper, we propose the self-equilibrium convergence method (SECM) to analyze the large--deformed mechanism, and this method is applied to cantilever beam model with vertical tip load. The validity of proposed method is confirmed when comparing it with the exact solution. The accuracy of this method is higher with the increasing number of elements and number of iterations. Also, a practical example, it is applied to displacement analysis of the parallel spring mechanism with large-deflective elastic hinges instead of revolute pairs. The validity of this method is confirmed with the results of experiment.