Space folding and unfolding mechanism for simulating connection of mimosa rigid hinge

Abstract

A space folding and unfolding mechanism for simulating connection of a mimosa rigid hinge comprises a machine base, unfoldable units and the rigid hinge. The machine base is in a regular octagon shape. Each side of the machine base is connected with a support rod through a rotating pair. Each unfoldable unit comprises the support rods and a four-rod mechanism. One end of each support rod is connected with the machine base through the corresponding rotating pair. The two sides of each support rod are connected with the corresponding four-rod mechanism through rotating pairs. Each four-rod mechanism comprises a driving rod, a transmission rod and support connecting rods, wherein the driving rod and the support connecting rods are connected with the corresponding support rods through the corresponding rotating pairs respectively, the driving rod and the support connecting rods are connected with the transmission rod through rotating pairs. The rigid hinge is connected with the two unfoldable modules and can rotate around a rotating pair in the middle. The space folding and unfolding mechanism is light in quality, good in stability, large in folding ratio, large in structural strengthand high in reliability and precision and can be applied to aerospace tasks of communication with satellite platforms and earth observation.

Description

technical field [0001] The invention relates to a space folding mechanism, in particular to a space folding mechanism imitating a mimosa rigid hinge connection. Background technique [0002] Mimosa is a leguminous perennial herb or subshrub that likes to grow in warm and humid areas. If you touch its leaves lightly with your hands, the leaves will immediately close together. People also call it induction grass. Mimosa cells are supported by the tiny net-like protein "actin". When the closing movement occurs, the phosphoric acid of actin will fall off. Create a closing motion. [0003] With the development of the aerospace industry, more and more aerospace projects will be applied to some large-scale space folding mechanisms, such as space stations, communication satellite platforms, space telescopes, planetary probes, etc. In order to meet the multi-functional requirements, one side of the space expansion mechanism has a larger area, but due to the space constraints of the...

AI Technical Summary

Problems solved by technology

[0004] Chinese patent 201410055564.5 discloses a space expandable mechanism. The expandable unit of this patent is 10 rods and 10 pairs of mechanisms. The redundant degree of freedom of the mechanism is large and the stability is poor; The patent can only be folded on a plane, and the folding ratio is small; Chinese patent 201110108913.1 discloses a space folding mechanism derived from five rotating sub-units, which has poor rigidity, poor stability, and low reliability

[0005] At present, there is no invention and design of a space folding mechanism that is light in weight, good in stability, large in folding ratio, high in structural rigidity, good in reliability, and high in precision.

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