Development of Antagonistic High Power Joint Mechanism by using Cam

Abstract

Many mechanisms with Impulse Force Generator is generally operated at high speed and strong force. We have been working on high power joint mechanism imitating locust hind-leg in order to realize a mechanism capable of not only rapid motion but also normal motion. However, they have some problems as following. In rapid motion, The developed mechanism has energy loss due to the viscous resistance of the reduction gear of the actuator. And the direction of rotation during rapid motion is restricted. In this paper, we propose a high power joint mechanism with higher performance which solves this problem. The mechanism proposed by us can perform rapid motion and normal motion at clockwise and counterclockwise. And the mechanism can change of the articular compliance. The mechanism consist two motors with cams, two wires, one spring and some links. Our verification experiment of rapid motion showed that the proposed mechanism can realize rapid motion without viscous drag.