New ideas of the mechanical creative design based on the logical study on the evolution of institutional

the innovation of the mechanical equipment depends on the mechanism innovation, especially the breakthrough of body´s major function. From the perspective of structuralism, this paper tries to analyze and induce the effect on the form of evolution regularity of various types of mechanical structures that four-bar linkage have, thus the ‘shape sequence’ figure reflecting the progress of mechanical internal evolution may be clear and straight. It also exemplifies various volume type fluid machinery evolutions, hoping to provide a reference for the mechanism innovative design with the evolution pedigree of the compiling.