Space high technology is one of the fastest-growing cutting-edge scientific and technological technologies in contemporary science and technology, and is an important indicator of a country's scientific and technological level. my country implements a "three-step" strategy for manned space engineering, of which the second step focuses on breakthroughs in key technologies for space rendezvous and docking. According to the requirements of the 921 Phase II space rendezvous and docking mission and the [2001] Zhuang Jiu Zi No. 92 Document "Reply on Issuing the 2001 Space Rendezvous and Docking Mechanism Plan", it is necessary to develop a "allogeneic isomorphic peripheral docking mechanism with inverted guide plates", that is, the docking mechanism used in the rendezvous and docking missions of my country's Tiangong-1 and Shenzhou-8. Among them, Shenzhou-8 is equipped with an active docking mechanism and Tiangong-1 is equipped with a passive docking mechanism. The docking mechanism needs to complete two major tasks: capture buffering and connection and separation. A new collision-type capture device (capture lock) and a card catch are used to achieve flexible connection between the two aircraft (i.e. capture and maintain capture).
The new collision capture device is a key component in the capture buffer subsystem of the docking mechanism. It is equipped with a retractable locking tongue. It uses the collision and lock principle to complete the initial stage of docking by interacting with the card catch on the passive docking mechanism. Automatic capture task. Performance indicators achieved:

1. Rapidly capture passive aircraft with capture response time better than 50ms;
2. During docking, the capture lock can withstand the energy of the collision of two 8-8-ton aircraft at an axial speed of 0.35 m/s;
3. Under a load of 7500N, the capture lock can self-lock; and under a load of 7000N, the capture lock can be electrically unlocked;
4. The self-locking angle of the capture lock is better than 5°.
   The main innovations are as follows:
5. Developed a passive collision capture technology, using a new four-bar linkage to solve the problems of rapid reset and large-load self-locking after capture by two aircraft, and achieve rapid capture and flexible connection between the two aircraft;
6. For the first time, the method of combining a four-bar linkage and a cam mechanism was used to solve the problem of unlocking large loads before separation of the two aircraft and ensure the reliable separation of the two aircraft;
7. The integrated technology of electric unlocking and manual unlocking (astronaut) solves the backup problem of unlocking the fast capture device and achieves high reliability in unlocking the two aircraft.
   The project is difficult and innovative in design, has independent intellectual property rights, and its product performance ranks among the domestic and international advanced levels. It has been successfully applied to the space docking of Tiangong-1 and Shenzhou series spacecraft docking mechanisms, making it a major contribution to the development of my country's spacecraft docking technology, with significant social and economic benefits and broad application prospects.