Space folding and unfolding mechanism with crank slide blocks as folding and unfolding units and connected by flexible hinges

Abstract

The invention discloses a space folding and unfolding mechanism with crank slide blocks as folding and unfolding units and connected by flexible hinges. A stand of the folding and unfolding mechanismis connected with an unfolding unit through a pin shaft on a pin shaft base; one ends of bracket rods of the unfolding unit are connected with the stand through pin shafts, and two sides are connectedwith crank slide block mechanisms through pin shafts; one ends of first connecting rods of the crank slide block mechanisms are connected with the bracket rods through pin shafts, and the other endsare connected with second connecting rods through pin shafts; one ends of the second connecting rods are connected with the first connecting rods through pin shafts, and the other end are connected with second slide blocks through pin shafts; one ends of the second slide blocks are connected with the second connecting rods through pin shafts, and the other ends are connected with first connectingrods of later sets of crank slide block mechanisms through pin shafts; first slide blocks of a final set of crank slide block mechanisms are only connected with the second connecting rods through pinshafts; the flexible hinges are three-degree-of-freedom flexible hinges; and two ends are connected with two unfolding modules. The mechanism is excellent in stability, high in structural rigidity, simple in structure, capable of folding in space and high in folding ratio.

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 connected with a flexible hinge of a folding unit. Background technique [0002] With the development of the aerospace industry, more and more aerospace projects will use some large-scale on-orbit structures to meet the needs of different space missions; however, due to the limitation of the carrying volume, the The size cannot meet the requirements of the mission, so various types of aerospace folding mechanisms have been rapidly developed and applied. In the field of aerospace engineering, the space folding mechanism is mainly used as the extension mechanism of payloads such as radar antennas, the supporting mechanism of large-diameter space antennas, the supporting mechanism of flexible solar wings, and the skeleton of the folding space station. [0003] Chinese patent 201410055607.X discloses a circular truss-type large-scale s...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent 201410055607.X discloses a circular truss-type large-scale space expandable mechanism, which is driven by ropes or springs, and the stability of the mechanism is low; Chinese patent 201510939297.2 discloses a support for rapid erection and withdrawal of radar antennas The arm folding mechanism, the invention realizes the folding through the form of guide rail and rack and pinion, which increases the manufacturing cost of the mechanism and has poor promotion and application ability; Can only be folded on a flat surface, the fold is relatively small

[0004] At present, there is no invention and design of a space folding mechanism that has good stability, high structural rigidity, simple structure, low manufacturing cost, high cost performance, can be folded in space, and has a large folding ratio.

Images