A friction wheel movement mechanism and on-orbit inspection device exposed outside the material cabin

Abstract

The invention relates to a movement mechanism of a friction wheel exposed outside a material cabin and an optical space inspection device. The output shaft of the driving mechanism is fixedly installed with an active friction wheel and rotated with an active preload base; one end of the driven preload base is connected to the active preload base. The tight base is rotated and installed, and the other end of the driven pre-tightened base is rotated and installed with a driven friction wheel; the friction rod is sandwiched between the driving friction wheel and the driven friction wheel assembly, and is frictionally matched with the driving friction wheel and the driven friction wheel respectively; The tightening spring clamp is arranged between the driven preload base and the active preload base, and generates thrusts on the driven preload base and the active preload base respectively, so that the driven preload base rotates around the active preload base and drives the driven friction wheel Compress the friction rod, and make the active preload base drive the active friction wheel to compress the friction rod. The beneficial effect of the present invention is that it has self-adaptability, certain pre-tightening force, so that there is enough room for temperature difference adjustment in the present invention, and it has strong 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...

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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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