A new kind of planar four-bar mechanism-four eccentricity mechanism

To enlarge the application range of traditional Planar four-bar mechanism and enrich the structure form,replace the four bars with eccentricity components and replace hinge connections with revolute joints completely to form a new kind of four-bar mechanism with all elements being eccentricity components,i.e,it is a small planar four-bar mechanism with large revolute joint.To promote the course of practical application,two kind of structure are introduced;the primary analysis of structure and motion,and CAE simulation and experiment verification are conducted.The basic dimension relationships among components and a structure optimizing method are recommended,and the driven member’s angular displacement function and curve yield,and that the two mechanisms share the same trajectory are proved by motion simulation,then the key points for implementing are put forward.Through above analysis,it is proved that the two mechanisms posses the identical nature characteristics of motion.