Material extravehicular exposure friction wheel movement mechanism and on-orbit inspection device

Abstract

The invention relates to a material extravehicular exposure friction wheel movement mechanism and an optical space inspection device. The output shaft of a driving mechanism is fixedly provided with adriving friction wheel, and is rotationally provided with a driving pre-tightening base; one end of a driven pre-tightening base and the driving pre-tightening base are rotationally installed, and adriven friction wheel is rotationally installed at the other end of the driven pre-tightening base; a friction rod is clamped between the driving friction wheel and the driven friction wheel assemblyand is in friction fit with the driving friction wheel and the driven friction wheel; a pre-tightening spring is arranged between the driven pre-tightening base and the driving pre-tightening base ina clamped mode and generates pushing force on the driven pre-tightening base and the driving pre-tightening base, so that the driven pre-tightening base rotates around the driving pre-tightening baseand drives the driven friction wheel to press the friction rod, and the driving pre-tightening base drives the driving friction wheel to press the friction rod. The material extravehicular exposure friction wheel movement mechanism has self-adaptive capability and certain pre-tightening force, so that the material extravehicular exposure friction wheel movement mechanism has enough temperature difference adjustment space and has high environmental adaptability and reliability.

Description

technical field [0001] The invention relates to the field of space mechanisms, in particular to a friction wheel movement mechanism exposed outside a material cabin and an on-orbit inspection device. Background technique [0002] With people's exploration of space technology and space science, the continuous development of space, moon, Mars operations and deep space exploration, there are more and more demands on space agencies; space has high and low temperature alternating, high vacuum, strong radiation, space Due to the environmental characteristics such as debris impact, it is an urgent problem to design a motion mechanism with strong environmental adaptability and high reliability. [0003] 1. Influence of space environment on mechanism reliability [0004] Compared with the institutions working on the ground, the working difference of space institutions is mainly caused by the space environment, and the space dynamic environment is different from the ground environmen...

AI Technical Summary

Problems solved by technology

[0008] (2) Effect of pressure difference

[0009] The effect of differential pressure is usually in the range of 1×10- 2 Pa~1×10- 5 Occurs in the vacuum range of Pa. When there is a sealed structure in the spacecraft, the internal and external differences of the sealed structure will increase, resulting in structural deformation or damage

[0010] (3) Effect of vacuum outlet

Released gases can re-condense on colder components, contaminating optics, sensors, and thermal control coatings with optically selective properties, resulting in reduced optical performance, increased solar absorption, and elevated temperatures

[0012] (4) Effect of radiation heat transfer

[0017] (6) Micro meteors and space debris

[0040] Traditional institutions generally require thermal protection in space, and temperature control requires a lot of power consumption, resulting in waste of resources;

[0041] In the screw transmission mode, the screw nut is loaded hard, causing more unnecessary loads and making the size of the motor and other driving devices larger; in addition, in order to adapt to the upward vibration, the screw needs greater rigidity, so the size of the screw shaft and nut Both are large; in addition, often due to the non-parallel screw or guide rail, the mechanism may be stuck under the influence of high and low temperature;

[0042] Rack and pinion transmission mode, the transmission has backlash; when impurities such as space debris adhere to the rack and pinion, it is easy to cause the mechanism to be stuck

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