Regular tetrahedral symmetrical deployable mechanism unit

Abstract

The invention discloses a regular tetrahedral symmetrical deployable mechanism unit which comprises 16 three-rod intersected connecting nodes and 24 equilong connecting rod units, wherein each three-rod intersected connecting node is provided with three revolute pairs, and the three-rod intersected connecting node is respectively connected with three connecting rod units through the three revolute pairs, and the two ends of the each connecting rod unit are respectively connected with different three-rod intersected connecting nodes through the revolute pairs; and the axial leads of the three revolute pairs on each three-rod intersected connecting node are located in a same plane, and a triangle formed by the intersection of the axial leads of the three revolute pairs is an equilateral triangle, a connecting rod installing position of each revolute pair is arranged at the midpoint of an edge of the equilateral triangle, and a connecting rod unit is perpendicular to the axial lead of the revolute pair connected with the connecting rod unit. The deployable mechanism unit disclosed by the invention is just composed of connecting rods and revolute pairs, so that the deployable mechanism unit is simple in structure, beautiful in modelling, convenient to manufacture, and easy to be folded and unfolded.

Description

Technical field [0001] The invention relates to a mechanism and a deployable structure, in particular to a regular tetrahedral symmetrical deployable mechanism unit. Background technique [0002] The deployable structure can be quickly expanded and formed in a compact and folded state, which has attracted wide attention from designers and engineers, and has gradually been applied in engineering. In recent years, researchers have proposed several types of deployable structural units. Among them, the shear hinge unit is the more common basic unit in the deployable structure. The Bennett unit and the derived Bricard unit belong to another type of classic closed loop mechanism. . The above types of basic units all have single-degree-of-freedom motion characteristics, and the multiple self-stress modes of the structure can provide additional structural rigidity, which has played an important role in the design of deployable structures. However, there are still fewer types of mechani...

AI Technical Summary

Problems solved by technology

However, there are still few types of mechanism units at this stage, which brings great difficulties to the design and engineering application of new deployable structures.

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