Novel scissor-based annular array extensible mechanism

Abstract

The invention discloses a novel scissor-based annular array extensible mechanism. The mechanism comprises a plurality of scissor unit mechanisms of the same structure, the scissor unit mechanisms are connected and combined through shared mobile connector components, shared fixed connector components and vertical rods. Each scissor unit mechanism comprises a center rotating connector component, the mobile connector components, the fixed connector components, the vertical rods and inclined rods, the two mobile connector components and the two fixed connector components are fixedly connected with the two vertical rods respectively, one ends of the four inclined rods are hinged to one side ends of the two mobile connector components and one side ends of the two fixed connector components respectively, and the other ends of the four inclined rods are fixedly connected with the center rotating connector component respectively. Due to the fact that the scissor unit mechanisms are annularly arrayed, and the overall annular array extensible mechanism is formed. After the overall mechanism is arranged in an array, only one freedom degree exists, and the mechanism is simple in structure, and easy to machine and install. The novel scissor-base annular array extensible mechanism is large in extending caliber, small in shrinking caliber, small in overall weight and high in overall reliability.

Description

Technical field [0001] The invention belongs to the technical field of structural design, and specifically relates to a novel scissor-based annular array deployable mechanism, which is suitable for a satellite antenna deployment system with a large-area deployable structure. Background technique [0002] Spaceborne deployable antennas are widely used in various satellites in geostationary orbit. The aperture and rigidity of its deployment mechanism are important indicators of the performance of the deployable antenna. [0003] figure 1 , figure 2 The folded state and unfolded state of the DAISY deployable antenna jointly developed for the German Dornier Company and ESA. This common deployable antenna is composed of a panel and a central hub, wherein the panel and the central hub are hinged through a rotating pair, and the antenna is deployed through rotation. The advantages of the expandable antenna are high precision in shape and surface, high storage rate and high structural ri...

AI Technical Summary

Problems solved by technology

[0004] In order to avoid the deficiencies of the existing technology and overcome the problems of complex driving structure, heavy system weight and increased cost of the mechanism, the present invention proposes a new type of scissors-based annular array expandable mechanism, which uses the proportional relationship of its geometric dimensions to achieve According to the requirements of contraction and expansion, the synchronous expansion of each unit is realized by using the connection mode between each unit; the scissors-based annular array expandable mechanism has a large expansion caliber, a small contraction caliber, relatively small overall mass, and high overall reliability

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