Modular space curved extendable mechanism containing flexible hinges

Abstract

A modular space curved extendable mechanism containing flexible hinges comprises flexible extension rods, first rigid rods and second rigid rods, which are hinged by rigid hinges to each form a triangular unit, wherein a plurality of triangular units corresponding up and down form annular modules by hinged networks of the rigid hinges, the plurality of annular modules are hinged by the rigid hinges to form an expandable truss mechanism through array combination, the rigid hinges of the expandable truss mechanism and the expandable films are connected by cables to form a modular space curved expandable mechanism containing flexible hinges, and the expandable truss mechanism is self-driven and deployed by utilizing elastic potential energy at the flexible hinges. The modular space curved extendable mechanism provided by the invention utilizes a plurality of slotted flexible hinges with simple mechanism assemble, and can greatly reduce the overall quality of the expandable mechanism, reduce the collision and friction during the expansion of the expandable mechanism and improve the folding performance of the mechanism.

Description

technical field [0001] The invention relates to an expandable mechanism, in particular to a high-rigidity synchronous space expandable mechanism composed of a plurality of annular modules with flexible hinges and a foldable film, which is suitable for the fields of space satellite antennas and the like. Background technique [0002] The expandable mechanism is a kind of movable structure that realizes structural shape changes and can be expanded. Its shape is generally divided into three categories: fully folded state, unfolded and folded motion state, and fully unfolded state; there are different types of units that make up the expandable mechanism. , such as link mechanism, parallelogram unit, polyhedron unit, etc.; deployable mechanisms are widely used in the aerospace field, such as solar panels, solar sails, etc. [0003] The rigid expandable mechanism mainly connects the moving parts through traditional kinematic pairs, so as to realize the predetermined unfolding move...

AI Technical Summary

Problems solved by technology

[0003] The rigid expandable mechanism mainly connects the moving parts through traditional kinematic pairs, so as to realize the predetermined unfolding movement, but the existence of the thickness of the parts makes assembly difficult. The existing common solutions, such as using offset rotating joint positions or using multiple Replacing a crease with a crease to solve the motion interference problem will make the structure of the deployable mechanism more complex and more difficult to manufacture

Due to the existence of processing errors and assembly errors, the mechanism is stuck and other phenomena appear

At the same time, there is a certain hinge gap in the rigid hinge, and structural collision and vibration will occur during the movement of the rigid hinge, which greatly reduces the stability of the expandable mechanism.

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