Synchronous unfolding-folding space extend arm of triangular prism based on centripetal mechanisms

Abstract

The invention provides a synchronous unfolding-folding space extend arm of a triangular prism based on centripetal mechanisms, which belongs to technical field of aerospace science and formed by series connection of a plurality of triangular prism centripetal mechanisms. Each triangular prism centripetal mechanism is composed of 3 central connection components, 6 angular point connection components and 12 rod-shaped joint shafts with the same length. The central connection components are provided with cross-shaped bracket structures, each supporting end of the cross-shaped bracket structures is fixedly connected with one joint shaft through a pair of parallel bevel gears, the angular point connection components are V-shaped bracket structures, each angular point connection component is provided with two open supporting ends, and the edge of each supporting end is coaxially connected with one bevel gear through a revolving shaft. The synchronous unfolding-folding space extend arm of the triangular prism based on centripetal mechanisms is small in freedom degree, capable of being unfolded and folded synchronously, good in reliability, high in repeatability, good in structural rigidity, convenient to structure combination and simple in movement mechanism control.

Description

technical field [0001] The invention belongs to the field of aerospace science and technology, and in particular relates to a triangular prism synchronously unfolding and folding space extension arm based on a centripetal mechanism. Background technique [0002] Due to the limitation of the geometric size of the payload compartment of the vehicle, satellites and space stations inevitably adopt a large number of deployable and assembling structures. It has a wide variety and wide application, such as the basic skeleton of the space station, the expandable / retractable space manipulator, the expandable antenna, the solar sail panel, the expandable launcher system, etc. These large aerospace structures are in a folded state during storage and launch on the ground, and then unfolded and locked into a working state after entering orbit. [0003] The extension arm mechanism can expand from a compressed state to a predetermined stable position, and bear a certain load. As an impor...

AI Technical Summary

Problems solved by technology

The current extension arm structures either have more degrees of freedom, are inconvenient to control, and have poor repeatability; or they use elastic components, but they have a large impact on the platform when they are unfolded, making it difficult to control the attitude of the aircraft, and the stiffness is not good; some are driven by ropes. Realize its unfolding and folding function, but the rope path is complicated and the distance is long, resulting in low reliability

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