关键词: 柔性铰链, 柔性簧片, 大行程, 虎克铰, 变形, 有限元分析

Abstract:

Three large-deflection flexible Hooke hinges using reeds as the basic units are constructed,and their own structural characteristics are analyzed in detail. Then,the deformations of the flexible Hooke hinges under pure torque loads are analyzed by using a pseudo-rigid model. Moreover,under the given parameter conditions,theoretical calculations are performed for the Hooke hinges,and the results are compared with those of the finite element
analysis. It is indicated that these three flexible Hooke hinges are all of the basic rotation characteristics of original Hooke hinges and can provide large two-dimension rotating deflection,that the theoretical results obtained by the pseudo-rigid model accord with those of the nonlinear finite element analysis,and that,under the given structural parameters,Hooke hinge C is a new type of large-deformation flexible hinge because it is of large output angle up to ± 11.9 °,small rotational center drift and small input coupling,so that it can be applied to the flexible parallel mechanism and flexible precision positioning platform.

Key words: flexible hinge, flexible beam, large-deflection, Hooke hinge