Space folding-unfolding mechanism provided with cranks and slide blocks as folding-unfolding units and adopting rigid hinge connection

Abstract

The invention discloses a space folding-unfolding mechanism provided with cranks and slide blocks as folding-unfolding units and adopting rigid hinge connection. Machine seats are connected with foldable units through hinges, and the foldable units comprise support rods and crank block mechanisms. One ends of the support rods are connected with the machine seats through hinges, and the two sides of the support rods are connected with the crank block mechanisms through hinges. The crank block mechanisms comprise the cranks, connecting rods and the slide blocks, one ends of the cranks are connected with the support rods through hinges, and the other ends of the cranks are connected with the connecting rods through hinges. One ends of the connecting rods are connected with the cranks throughhinges, and the other ends of the connecting rods are connected with the slide blocks through hinges. One ends of the slide blocks are connected with the connecting rods through hinges, and the otherends of the slide blocks of the former crank block mechanism are connected with the cranks of the next crank block mechanism. The rigid hinges enable the two foldable units to be connected. Accordingto the space folding-unfolding mechanism, the number of the driving motors is small, the weight of the folding-unfolding mechanism is low, the space folding-unfolding mechanism is conveniently transported on rocket vehicles, the folding-unfolding process is simple, the space folding-unfolding mechanism can be folded in a space, the folding ratio is large, rigidity is large, the stability is good,the reliability is high, and the good practicability is achieved.

Description

technical field [0001] The invention relates to a space folding mechanism, in particular to a space folding mechanism in which a crank slider is rigidly hinged to a folding unit. Background technique [0002] With the development of aerospace industry, the structure of spacecraft tends to be larger. To be the envelope volume of the small spacecraft during the launch phase, the space unfolding mechanism needs to be folded, and then unfolded after the spacecraft enters the orbit. The application of the space folding mechanism has greatly expanded the functions of the spacecraft, and has important application prospects in space stations, communication satellite platforms, earth observation, planetary exploration, etc., and has become one of the research hotspots in the aerospace field. [0003] Chinese patent 201410538119.4 discloses a spherical antenna support mechanism. The foldable unit of the invention is complicated, and the folding process is complicated. Triangular pla...

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Problems solved by technology

[0003] Chinese patent 201410538119.4 discloses a spherical antenna support mechanism. The foldable unit of the invention is complicated, and the folding process is complicated. Triangular planar array expandable mechanism, the patent can only be folded on a plane, and the folding ratio is small; Chinese patent 201410055607.X discloses a ring-shaped truss-type large-scale space expandable mechanism, which is driven by ropes or springs, and the stability of the mechanism is low

[0004] At present, there is no invention and design of a space folding mechanism with simple structure, simple folding process, folding in space, large folding ratio, high rigidity, good stability and high reliability.

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