A hook type connecting and unlocking device

Abstract

A hook type connecting and unlocking device comprises an upper end frame (1), a rotating block (2), a rolling shaft (3), a base (4), an internal supporting ring (5), a lower end frame (6), a motor assembly (7), connecting rods (8) and a roller (9), wherein the upper end frame (1) and the lower end frame (6) are separately fixedly connected to two structures (10 and 11) to be connected and unlocked; a groove is formed in the upper end frame (1); the lower end frame (6) is fixedly connected with the base (4); one end of the rotating block (2) is connected to the base (4) through the rolling shaft (3); a projection is arranged on one side of the other end of the rotating block (2); the shape of the projection is matched with that of the groove; a slot is formed in the other side of the otherend of the rotating block (2); the internal supporting ring (5) is placed in the slot and is connected with the motor assembly (7) through the connecting rods (8); and under the driving effect of themotor assembly (7), the projection on the rotating block (2) rotates around the rolling shaft (3) to enter the groove of the upper end frame (1) or leave away from the groove of the upper end frame (1) through expansion and shrinkage of the internal supporting ring (5), and thus, locking and releasing of the two structures (10 and 11) are realized.

Description

technical field [0001] The invention belongs to the technical field of launch vehicle structures, and in particular relates to a device capable of realizing effective connection and unlocking between two structural parts. Background technique [0002] The interstage and payload separation devices of launch vehicles are mainly divided into three types: wired type, point type and combined type separation. Typical line separation devices include flexible detonating cord, shaped energy cutting cord separation device, expansion tube separation device and airbag separation device, etc. Typical point separation devices include explosive bolts, explosive nuts, separation nuts, etc. The combined separation device is mainly a tape separation device. However, the existing separation devices all use pyrotechnic devices as the action energy, which has the disadvantages of large impact, undetectable and undetectable before use, and also has certain safety problems. For example, the wra...

AI Technical Summary

Problems solved by technology

Since the work of the explosive bolt or cutter is to achieve material fracture within a few hundred microseconds, the pre-tightening force of the tape and the strain energy of the docking frame are also released instantly, and the separation impact of the tape-type separation device is too large. Hazards to rocket safety

At the same time, since the separated pyrotechnic components such as explosive bolts or cutters cannot be reused after working once, the unlocking and separation of the tape cannot be pre-detected on the ground, which is not conducive to improving the reliability of the launch vehicle

In addition, the distribution uniformity of the pre-tightening force generated when the tape is loaded is not easy to control. Repeated trial installation and partial knocking are required to make the pre-tightening force evenly distributed as much as possible, which leads to cumbersome installation operations and low efficiency.

The pre-tightening force of the thin tape is greatly affected by the ambient temperature. The influence of temperature needs to be considered during the design and use process, and a certain margin must be taken to ensure the connection stiffness. This will have a negative impact on the environment and installation operations that the tape is allowed to use.

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