Abstract
A new hexahedral single degree of freedom developable symmetrical coupling mechanism is proposed based on the he spatial structure characteristics of regular tetrahedron. Firstly, in order to design the equivalent basic model of hexahedral mechanism, three kinds of substitute components are designed which based on the analysis of the spatial structure characteristics of the new hexahedron. The basic movable element is obtained by adding branched chains to change the constraints. A hexahedron coupling mechanism is designed by combining and reconstructing the elements. Secondly, based on the screw theory, the independent motion shunt labeling method is applied to calculate the degree of freedom and motion properties. Finally, the three-dimensional model of the coupled mechanism is established, and the displacement variations of the end and nodes under different driving conditions are simulated and revealed with time-displacement curves by Adams. Simulation results show that the novel mechanism is a symmetrical deployable coupled mechanism with one translation DOF.
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