Workspace rule of variation of seven- bar mechanisms with various translational outputs

A two-degree-of-freedom seven-bar mechanism, which is composed of a hinged five-bar mechanism and a RPP grade- II Assur group, can realize translation-output displacement if the two driving links are appropriately programmed. This paper is to investigate variation of seven-bar mechanisms and to analyse their workspace rule with various translational outputs of triple-crank seven-bar mechanism. The analysis results are a theoretical basis with adjustable controlled structural parameters to realize the required translation-output motion rules.