A motion assisting device for a self-deploying mechanism with a large expansion and contraction ratio in space

Abstract

The invention provides an action assisting device for a self-expanding mechanism with a large space expansion and contraction ratio, which belongs to the technical field of space expansion mechanisms. The invention includes a base, a spring pull rod, a bracket, a tension spring, a roller, a connecting rod and a compacting roller. The spring and the spring pull rod are connected to the connecting rod through the spring. The device uses four rollers to realize synchronous clamping and relaxation, so that the radial constraint accuracy of the self-expanding mechanism with a large space expansion ratio is guaranteed. The rolling friction between layers increases the holding force between layers and increases the stiffness after deployment. The invention provides an action auxiliary device for the self-deploying mechanism with a large space expansion and contraction ratio, and solves the problems of poor radial rigidity and weak bearing capacity of the mechanism.

Description

technical field [0001] The invention relates to the technical field of space expansion mechanism, in particular to an action assisting device for a self-expansion mechanism with a large space expansion ratio. Background technique [0002] With the rapid development of the aerospace field, the scope of space exploration in the world is becoming wider and wider, and the functional requirements for space vehicles are also getting higher and higher. However, the complete functional requirements make the structure of the aircraft more complex and the volume continues to increase. The launch of the aircraft increases the difficulty. [0003] Based on this, countries around the world use new materials, new structures, and new processes to reduce the volume of spacecraft. Among them, deployable mechanisms, as an effective way to reduce the mass and volume of aircraft, have attracted widespread attention, especially the large expansion ratio. Self-deploying mechanisms have been in i...

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Problems solved by technology

[0004] The quadrilateral deployment mechanism has fewer overall parts and a relatively simple structure. Under long-distance deployment conditions, the truss hinge deployment method is often used. Large-scale antennas and space large-aperture optical telescope support structures often use ring trusses, inflatable hardening and other methods. The above-mentioned types of supports The structural methods can make the structural components bear larger loads and have higher rigidity, but for the self-deploying mechanism with a large space expansion ratio like a small slender antenna, these structures increase the volume of the aircraft and increase the launch cost of the aircraft

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