Scissor-type space stretching arm mechanism

Abstract

The invention discloses a scissor-type space stretching arm mechanism which comprises a first scissor unit part, a second scissor type unit part, a driving part, a top support part, four first longitudinal support parts and four second longitudinal support parts, wherein the structure of the first scissor type unit part is identical with that of the second scissor type unit part; the structures of the four first longitudinal support parts are identical; the structures of the four second longitudinal support parts are identical; the top support part is mounted on the driving part through the second scissor type unit part and the first scissor type unit part sequentially; and the first longitudinal support parts and the second longitudinal support parts are respectively arranged on four sides of the first scissor unit part and the second scissor type unit part. According to the scissor-type space stretching arm mechanism disclosed by the invention, by adopting the dual-cam combined design, the longitudinal and transverse rigid locking of a space stretching arm is realized through a dual-cam outline on a stepped cylindrical cam, and thus the stable state of the stretched stretching arm is guaranteed to be a rigid truss structure. The scissor-type space stretching arm mechanism disclosed by the invention has the advantages of great folding-unfolding ratio, compact structure and favorable symmetry. The folding-unfolding and locking functions are simultaneously achieved by inputting a single power source, and thus the folding-unfolding precision is ensured. The scissor-type space stretching arm mechanism is applied to the field of foldable-unfoldable mechanisms.

Description

technical field [0001] The invention relates to a space extension arm mechanism, in particular to a scissor type space extension arm mechanism. Background technique [0002] The space extension arm mechanism is an important part of the space retractable mechanism. It is mainly used in various detection activities to expand flexible solar panels, support extendable antennas, synthetic aperture radars, space telescopes, etc., or as a gravity gradient rod, magnetic Structures such as strong needles and separation of electronic devices to reduce mutual interference play an important role in space exploration missions. Existing spatial extension arms usually adopt rope pre-tightened flexible locking and torsion spring spring elastic locking, and lack longitudinal rigid support and locking, with low reliability and poor stiffness. Contents of the invention [0003] In order to solve the problems existing in the background technology, the present invention designs a scissor-type...

AI Technical Summary

Problems solved by technology

Existing spatial extension arms usually adopt rope pre-tightened flexible locking and torsion spring elastic locking, and lack longitudinal rigid support and locking, with low reliability and poor stiffness

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