Space expandable exposure experiment platform based on spherical 5R mechanism

Abstract

The invention relates to a spherical 5R mechanism-based space expandable exposure experiment platform, which comprises a central module, a lead screw nut transmission mechanism, a connecting rod assembly, spherical 5R mechanisms, a driving mechanism and expansion blocks, and is characterized in that a plurality of expansion blocks are hinged to the peripheral edge of the central module, and a spherical 5R mechanism is hinged between every two adjacent expansion blocks; the inner side face of each unfolding block is connected with at least one connecting rod assembly, the driving mechanism is connected with the lead screw nut transmission mechanism and drives the lead screw nut transmission mechanism to drive the connecting rod assemblies to move, and the unfolding blocks and the spherical 5R mechanisms are driven by the connecting rod assemblies to be synchronously folded and unfolded. According to the exposure experiment platform, the unfolding block and the spherical 5R mechanism are folded and unfolded through cooperation of the lead screw nut transmission mechanism and the connecting rod assembly, the exposure experiment platform is folded towards the center when folded, smaller launching space is occupied, the surface area for exposure experiments is effectively increased when the exposure experiment platform is unfolded, the number of exposure experiments capable of being carried out is increased, and the development efficiency is improved. And a relatively large folding and unfolding ratio is realized.

Description

technical field [0001] The invention relates to the technical field related to space exposure, in particular to a space expandable exposure experiment platform based on a spherical 5R mechanism. Background technique [0002] The demand for space missions is gradually increasing, and the structural size of the corresponding spacecraft is getting larger and larger, but this is in contradiction with the rocket's carrying space and capabilities. The deployable mechanism can complete the transformation from the folded state to the unfolded state under the control of commands, and After unfolding, it has a large envelope size and a certain degree of rigidity, and can carry a specified load mechanism. Therefore, it is possible to choose an expandable mechanism with a folding function, which is expected to solve this problem. [0003] Space exposure experiments are an important way to explore space science. The prerequisite for extravehicular exposure experiments is that the spacecr...

AI Technical Summary

Problems solved by technology

The current exposure test platform hardly has the function of folding and unfolding, and most of them are truss structures or the outer surface of the cabin, which are limited by factors such as the position and area of ​​the load hanging point, and the rocket launch envelope.

Large-scale exposure experiment platforms are mostly rigid box-shaped structures, which are bulky and inconvenient for transportation. They require multiple launches for on-orbit modular assembly before they can be used, requiring high launch costs.

[0004] Some existing foldable space exposure platforms use memory alloys or cams to drive and unfold, which have low structural strength and cannot form effective restraint supports. For long-term exposure tests, it is easy to cause structural failure and lose support. cause test failure etc.

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