Shear type unit imitation cobweb space expandable mechanism

Abstract

Disclosed is a shear type unit imitation cobweb space expandable mechanism. The shear type unit imitation cobweb space expandable mechanism comprises expandable units and a machine base, wherein eachexpandable unit comprises a driving rod, a hinge, a connecting rod and a shear type unit; and the machine base is a pentagonal machine base. The five expandable units are annularly arrayed on the samemachine base; one driving rod can be shared between every two adjacent expandable units; the first hinge sleeved on the driving rod is connected with the second hinge to form a closed loop space expandable mechanism; and the space expandable mechanism has a freedom degree, the required driving is small, the control is simple, and the expandable units are connected through two hinges, so that themechanism has the advantages of being high in rigidity and strength, stable in mechanism unfolding, light in structure weight and high in folding ratio, and is suitable for the fields of space plane satellite launching antennas, space satellite parabolic antennas and the like.

Description

technical field [0001] The invention relates to the field of space unfolding mechanisms, in particular to a space expandable mechanism based on a scissor unit imitating a spider web. Background technique [0002] Spider webs usually have symmetry and asymmetry, and are an extremely regular web. The flexibility and strength of the web are greater than steel wires in the same volume, so they are extensible; spider webs can form different shapes according to different environments. , the structure of the whole net is stable and firm, which can make the impact force received by each symmetrical net evenly distributed on the whole net. [0003] With the vigorous development of the aerospace industry, the exploration of outer space is gradually deepening. It is necessary to carry different spacecraft support frames to outer space to perform corresponding tasks. However, due to the limited space for rocket transportation, this requires the organization to be in a folded or folded s...

AI Technical Summary

Problems solved by technology

[0004] Chinese patent 201210310520.3 discloses a planar array expandable mechanism based on square units, which has a small folding ratio and is plane folded; Chinese patent 201210397908.1 discloses a regular tetrahedral symmetrical expandable mechanism unit. It is convenient to unfold and fold, but the strength and rigidity of the mechanism are low, and the folding unit is not expandable

[0005] At present, there is no innovative invention design based on scissor unit imitating spider web space expandable mechanism with the characteristics of high rigidity and strength, light structural weight, stable mechanism unfolding, large folding ratio, and single degree of freedom.

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