Design of Less-Input More-Output Parallel Mechanisms

An important concept of less-input more-output parallel mechanisms (Li-Mo PMs) is proposed based on the research results achieved by the authors on less-input three-output parallel vibrating screen and considering the status of increasing application of PMs and development demands of the emerging technology. First, the correlations between the number of input (w), degrees of freedom (dof) and numbers of output position and orientation (N-out) of this kind of Li-Mo PMs are further described. Secondly, the research and application of the single-input three-output parallel vibrating screen developed by the authors are illustrated. Sequentially, conceptual designs of two kind rehabilitation training devices for shoulder joint based on single-input three-rotation output PMs are presented. Li-Mo PMs has important theoretical and extensive practical value for novel industrial equipment design and is expected to be an important research direction in the field of PMs.