SMA wire driving catapult releasing device

A technology of releasing device and compressing spring, applied in the aerospace field, can solve the problems of large impact of the unlocking and releasing mechanism of the spacecraft, cannot be reused, complex structure, etc., and achieves the effects of quick unlocking and releasing response, easy operation and large payload

Active Publication Date: 2017-02-22
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems that the existing spacecraft unlocking and releasing mechanism has a large impact, which affects t

Method used

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  • SMA wire driving catapult releasing device
  • SMA wire driving catapult releasing device
  • SMA wire driving catapult releasing device

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Embodiment Construction

[0024] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0025] see Figure 1-Figure 4 As shown, an ejection release device driven by an SMA wire includes a separation body 1, a separation compression spring 4, a threaded rod 5, a connecting body 7, a lower limit steel ball 9, a limit compression spring 12, a drive compression spring 13, a reset Compression spring 14, steel ball cage 15, sliding bolt 16, connecting sleeve 17, pin bolt 18, upper limit steel ball 19, shape memory alloy wire 21, outer shell 22 and lower end cover 24;

[0026] The pin bolt 18 is a hollow pin bolt, the top of the pin bolt 18 has an annular groove that can accommodate the upper limit steel ball 19, and the sliding bolt 16 has an annular groove that can accommodate the lower limit steel ball 9; the upper end of the outer shell 22 is installed on the connecting body 7 , the lowe...

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Abstract

The invention discloses an SMA wire driving catapult releasing device, and relates to a space mechanism. The device aims to solve the problems that when the current spacecraft deblocking releasing mechanism works, the impact is big and causes influences to the device; in addition, the current spacecraft deblocking releasing mechanism is strong in pollution and can not be reused, and has a complex structure at the same time. The SMA wire driving catapult releasing device comprises a detached body, a detached compression spring, a threaded rod piece, a connecting body, a lower limiting steel ball, a limiting compression spring, a driving compression spring, a restoration compression spring, a steel ball holder, a sliding bolt, an adapter sleeve, a bolt pin, an upper limiting steel ball, a shape memory alloy wire, an external shell body and a lower cover; the upper end of the external shell body is arranged on the connecting body; the bolt pin is arranged in the external shell body, the upper end of the external shell body penetrates through the connecting body in a sliding mode, the steel ball holder is arranged in the bolt pin, the shape memory alloy wire penetrates through the lower end of the sliding bolt and are led out through the external shell body, the restoration compression spring is arranged between the sliding bolt and the steel ball holder, and the driving compression spring is arranged in the external shell body; and the connecting cover is arranged on the upper end of the external shell body in a sleeving mode. The SMA wire driving catapult releasing device is used in aerospace.

Description

technical field [0001] The invention relates to a space mechanism, in particular to an aerospace ejection release device, which belongs to the field of aerospace technology. Background technique [0002] The present invention is used to release payloads deployed on space vehicles. At present, the traditional unlocking and releasing mechanisms of spacecraft are mostly pyrotechnic bolts. The pyrotechnic bolt protects the payload during launch and does not unlock it; after issuing a program command, it can be unlocked on-orbit in a timely and synchronous manner. However, when pyrotechnics are working, they will produce a large impact, which will have a great impact on the satellite's attitude control and sensitive equipment. The chemical gas released after the explosion of pyrotechnics is polluting and will cause damage to precision instruments such as lenses and electronic devices. Also, from a reliability standpoint, pyrotechnics are single-use only and are susceptible to ...

Claims

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Application Information

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IPC IPC(8): B64G1/64
CPCB64G1/645
Inventor 岳洪浩俞正旺杨飞邓宗全冯凯
Owner HARBIN INST OF TECH
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