Mechanical Performance of Right-Angle Flexure Hinge

To analyze the mechanical performance of flexure hinges used as precision transmission element, based on the study of kinds of familiar flexure hinges, the mechanical performance of right-angle flexure hinge was analyzed because of its sensitive deformation. Three dimensional mechanical model of right-angle flexure hinge was established, and matrix expression of its stiffness coefficient was deduced. The factors influencing the stiffness performance of right-angle flexure hinge were studied from essential size and so on. The results show that the stiffness coefficient of flexure hinge is influenced by its essential size and elastic modulus. When the length of flexure hinge increases or the elastic modulus of flexure hinge material decreases,the stiffness coefficient will decrease in all directions. All those work is of good significance to analyzing mechanical performance of flexure hinge, optimizing design of piezoelectric actuator and improving integrative performance of piezoelectric actuator.