A two-layer unfoldable antenna mechanism driven by a torsion spring based on a shear type mechanism

Abstract

A two-layer unfoldable antenna mechanism driven by a torsion spring based on a shear type mechanism includes a torsion spring assembly and a shear type mechanism, the torsion spring assembly includesa torsion spring support, torsion springs, pins and rigid hinges, two coaxial through holes are respectively arranged on opposite two supporting plates of the torsion spring support, A pin shaft is installed in each pair of through holes, A torsion spring and a rigid hinge are respectively nested on the pin shaft, and the other end of the rigid hinge is fixedly connected with the connecting rod onthe scissors-type deployable unit. The scissors-type mechanism comprises a scissors-type deployable unit and a support frame, and the scissors-type mechanism is driven by the torsion spring to drivethe unfolding or folding motion of the scissors-type mechanism, thereby realizing the unfolding and folding behavior of the whole mechanism. As that torsion spring is used as the drive source, the invention realizes the motor-free driving and unfolding, so that the unfolding response of the mechanism is rapid, and the overall weight of the mechanism is reduce at the same time. The invention has the characteristics of simple driving, light structure quality, large space folding ratio, expansibility of the unit, and high practicability.

Description

technical field [0001] The invention relates to the field of space folding mechanisms, in particular to a double-layer deployable antenna mechanism driven by a torsion spring based on a scissor mechanism. Background technique [0002] 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 state. It is fixed in the transport load compartment, and then unfolded into a mechanism after entering the predetermined trajectory, so the mechanism can be deployed to become a significant feature of many spacecraft or large-diameter antennas. At present, many space folding mechanisms can be deployed through a combined array of folding units or topological composition. [0003] Chinese patent 201710876469.5 ...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent 201710876469.5 discloses a petal-type expandable fixed-surface antenna deployment mechanism. The arc-shaped panel of the mechanism is connected with the support rod by a spherical pair, and the mechanism is unfolded by a single motor drive, but the folding of the mechanism is relatively small and the folded volume is large. ; Chinese patent 201210397908.1 discloses a regular tetrahedral symmetric expandable mechanism unit. Although the mechanism is simple in structure and convenient to unfold and fold, the strength and rigidity of the mechanism are low, and the unfolding unit is not expandable; Chinese patent 201510253962.2 discloses a A regular hexagonal planar unfolding mechanism, which is a planar unfolding and folding mechanism with a small folding ratio

[0004] At present, there is no innovative invention design based on a scissor mechanism torsion spring driven double-layer deployable antenna mechanism, which has the characteristics of simple drive, light structure, large space folding ratio, quick response to deployment, and expandability of the unit.

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