A Linkage Model with Revolute Clearance and Its Application to Analyzing the Precision of a Complex Linkage

The problems about the precision failure, impact, noise and life reduction etc. caused by the revolute clearance and manufacture error attracted wide attentions. The stochastic linkage model that is established utilizing the concept of probability and statistics theory is firstly applied to analyzing the movement precision of the complex linkage system of the vacuum circuit breaker considering revolute clearances and linkage length error. The research indicates that different size parameter errors have different sensitive degrees to the precisions of displacement, velocity and acceleration. The sensitive degree to the precisions of displacement, velocity and acceleration not only relates to the movement position, but also shows great difference about the influence of output precision among the linkages of the system.