A Space Folding Mechanism Using Six-bar Mechanism as Expandable Unit

Abstract

The invention discloses a space folding mechanism taking a six-rod mechanism as an extensible unit. The space folding mechanism comprises a six-rod mechanism, three-degree-of-freedom hinges and gaskets, wherein the six-rod mechanism comprises an octagonal support, an inclined side rod, a slider spring limiting telescopic rod and a slider spring combined constraint telescopic rod; the gaskets comprise a first gasket and a second gasket; the octagonal support is connected with one end of the inclined side rod through one three-degree-of-freedom hinge, the other end of the inclined side rod is connected with the first gasket and one end of the slider spring limiting telescopic rod through one revolute pair, the other end of the slider spring limiting telescopic rod is connected with one end of the slider spring combined constraint telescopic rod through another revolute pair, and the other end of the slider spring combined constraint telescopic rod is connected with the octagonal supportthrough the other three-degree-of-freedom hinge. The space folding of the mechanism is realized through folding twice, and the mechanism has the characteristics of large folding ratio, high stabilityand high reliability.

Description

technical field [0001] The invention relates to a folding mechanism, in particular to a space folding mechanism with a six-bar mechanism as an expandable unit. Background technique [0002] With the development of the aerospace industry, in order to meet the needs of different space missions, more and more space expandable mechanisms are used in space missions such as space stations, mobile communications, earth observation and planetary exploration. However, due to the limitation of the volume of the launch vehicle, the deployable mechanism is required to have light weight, large folding ratio and high stability during the launch process. After the deployable mechanism enters the space orbit, it can be deployed into a predetermined structural form. [0003] Chinese patent 201210310876.7 discloses an equilateral triangular planar array expandable mechanism, which can only be folded on a plane, and the folding ratio is small; Chinese patent 201410055564.5 discloses a space ex...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent 201210310876.7 discloses an equilateral triangular planar array expandable mechanism, which can only be folded on a plane, and the folding ratio is small; Chinese patent 201410055564.5 discloses a space expandable mechanism, and the expandable units of this patent are 10 rods and 10 pairs Mechanism, the redundant degree of freedom of the mechanism is large, and the stability performance is poor; Chinese patent 201610511971.1 discloses a scissor-type hexagonal prism expandable unit and a space expandable mechanism composed of it. When orbiting, it is difficult for the mechanism to unfold into a predetermined structural form

[0004] At present, there is no invention and design of a space folding mechanism that has the characteristics of light weight, large folding ratio, high precision, high strength, high stability, and high reliability, and the space folding process is simple.

Images