Abstract
A solid lubricating material exposure experiment in space is one of the missions during the seventh manned spaceflight of China, and the key is to develop a device which can be fixed reliably outside of the orbital module and can be fetched conveniently by an astronaut during space walk. The solid lubricating material experiment device needs to be locked reliably in a vibrating and impacting environment during the launch phase, and should meet the requirement that it can be unlocked and fetched reliably by the astronaut wearing an extravehicular spacesuit via simple operations in orbit in an environment of high and low temperature. As for the device we developed, the environmental characteristic of the mission was analyzed, the mechanical analysis and thermal analysis were carried out, and then a mechanism with functions of mechanical locking, structural self-locking and manual unlocking was designed. The device was verified by a sequence of experiments and was fetched by the astronaut during the flight of the Shenzhou-7 Spaceship.
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