Vertex-extensible polyhedron folding mechanism

Abstract

A vertex-extensible polyhedron folding mechanism comprises four identical extensible platforms A, B, C and D, a first branched chain, a second branched chain, a third branched chain, a fourth branched chain, a fifth branched chain and a sixth branched chain. The four extensible platforms are connected with each other through the six branched chains respectively in a rotatable connection mode to form a similar tetrahedron in appearance. The extensible platform A comprises three platform vertexes, a platform rotating shaft and a platform driving motor. Every platform vertex comprises a sliding rail, a sliding block, a small rotating shaft, different platform connecting rods with clockwise and anticlockwise 60-degree torsion angles, a synchronizing bar, a platform vertex shaft and a branched chain connecting shaft. The first branched chain, the second branched chain, the third branched chain and the fourth branched chain comprise branched chain rods and branched chain motors; and the fifth branched chain and the sixth branched chain comprise branched chain rods and counter weight rotating shafts. Abundant states can be obtained by controlling every platform driving motor and every branched chain platform turn angle. The vertex-extensible polyhedron folding mechanism can be used for military, survey, teaching and display and the like.

Description

technical field [0001] The invention relates to a folding tetrahedron mechanism, in particular to a platform scalable folding tetrahedron mechanism. The invention can be applied to teaching aids, children's toys, military reconnaissance, exhibition visits and other purposes. Background technique [0002] For a long time, the scalable and foldable mechanism has excellent characteristics such as small space occupation, light weight, easy storage, easy portability, large degree of deformation, and rich unfolded shapes. All aspects have high application value. [0003] The calculation of the position, attitude and working space of the movable platform relative to the static platform has undergone a lot of analysis and research in the field of parallel mechanisms, and a large number of mechanical configurations have been synthesized. Parallel robots with few degrees of freedom have higher application value due to the advantages of less driving parts, compact structure, low cost...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: the static platform and the dynamic platform in the parallel mechanism are integrally formed into a fixed component respectively. Although the design shapes of the platforms are different, the size and structure of the platforms are generally fixed and cannot be changed, resulting in the inability to obtain a large zoom ratio and simultaneously Features flexible operation

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