Neck type controllable unlocking device

Abstract

The invention discloses a neck type controllable unlocking device. The neck type controllable unlocking device comprises a separated part and an unlocking device body, wherein the unlocking device body drives the separated part to generate displacement. The unlocking device body comprises an accommodating cylinder body and an unlocking driving device which is arranged in the accommodating cylinder body. The unlocking driving device is mainly composed of a shape memory alloy spring and a buckle and neck structure. The shape memory alloy spring which is capable of reversibly and repeatedly working drives a buckle to move to control the self locking and the unlocking of the separated part, and therefore the separated part can be quickly and accurately separated from a separating part under various working conditions. The neck type controllable unlocking device is simple in structure, flexible in movement, convenient to use and maintain, free of generating pollution, and capable of being cyclically repeatedly utilized, reliability and stability of the unlocking device are improved, the service life of the unlocking device is prolonged, and development of space vehicles is promoted.

Description

technical field [0001] The invention relates to a controllable unlocking device, in particular to a controllable unlocking device driven by a shape memory alloy, which belongs to the subject field of mechanical engineering and intelligent material application. Background technique [0002] In the field of aerospace, it is often necessary to use some unlocking devices to control the separation of the internal mechanism of the spacecraft. The performance of the unlocking device during the separation process is directly related to the success or failure of the spacecraft mission. Therefore, before the unlocking device used in the aerospace field is separated, it must be ensured that the connection between the separated part and the separated part is reliable and in a self-locking state; Subsequent work on aerospace structures is not affected during or after separation. Most of the unlocking devices commonly used in the prior art are mainly explosive unlocking methods. figure ...

AI Technical Summary

Problems solved by technology

When the unlocking device of this structure explodes, the explosion products will overflow from the separation surface, and the explosion will produce fragments, which will cause a certain degree of pollution to the surrounding equipment or environment, and may seriously affect the follow-up work of the spacecraft. Secondly, the unlocking method in the prior art is that the one-time mechanism cannot be reused many times, which causes unnecessary waste of energy and hinders the development of spacecraft.

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