Comparison of Assemblies of Four-Link Structural Groups of 3rd Class on the Transmission Angle

Comparison of various assemblies of four-link structural group of 3rd class with revolute joints on the transmission angle is performed. Equations of the trajectories of plug points of one of the groups of joint are obtained to determine transmission angles. Derived functions of these equations enable to determine the values of transmission angles for each assembly group. It is shown that only two assemblies of maximum possible assembling number of such group (six) have practical value. The solution of this problem was performed with the help of Mathcad program.