Abstract
For the development of mechanical systems of high-speed and high-precision, a dynamic design theory with consideration of bearing clearances which have a great influence upon the dynamic characteristics of the systems is strongly demanded. In this paper, about a crank-and rocker mechanism with clearances, three kinds of restraint methods of separations between pairing elements have been discussed with consideration of the conditions which the exciting forces of a model vibratory system with a mass, spring and dashpot which is derived from equations of motion of mechanism with clearances decrease or become constant. Especially, in order to obtain mechanisms with good dynamic performance, an optimum design method of the mechanisms with clearances has been discussed to determine directly shapes of moving links instead of their mass parameters.
