A split memory alloy spring pin

Abstract

The invention provides a split-type memory alloy spring pin, which includes a mounting seat, a side cover, a bottom cover, a pin post, a retaining ring, a pin post spring, a pin hole seat, a locking plate, a locking spring, a pressing plate, an insulating heat insulation pad, a heating sheet, memory alloy sheet and electrical connector, the side cover is installed on the side of the mounting base, and the bottom cover is installed on the bottom; the pins pass through the round hole on the right side wall of the mounting base, the round hole of the middle rib, the locking plate, and the stopper in sequence from the right. ring, pin spring and the round hole on the left side wall, and finally inserted into the pin hole on the pin hole seat; one end of the locking plate is a ring, the other end is a slender strip, and the end of the slender strip is a hook, and the hook hook is The slender waist-shaped groove; the locking piece is inserted into the inner cylindrical hole through the narrow slit on the side of the mounting base, and the slender strip part passes through the lock spring and the pressure plate in turn, and finally hooks on the memory alloy piece. The spring pin of the present invention utilizes the principle that the memory alloy recovers the state before deformation after being heated, and realizes the remote control of unlocking the spring pin in combination with the electrical connector, and has the advantages of small size, low power consumption, easy operation and reusability.

Description

technical field [0001] The invention relates to a split-type memory alloy spring pin, which is especially suitable for unlocking micro-nano-satellite star-rocket separation mechanism, solar wing deployment unlocking, or satellite-borne antenna deployment unlocking for which the separation impact requirement is less than 100g, and can also be used for other low-impact unlocking Separate unlocking mechanism on demand. Background technique [0002] After the micro-nano satellite enters the orbit, it is necessary to release the locking of the satellite-rocket separation mechanism to the micro-nano satellite or antenna through the pin puller. After the spaceborne antenna enters the orbit with the satellite, it is necessary to release the locking of the antenna deployment mechanism to the antenna through the pin puller. Traditional pin pullers generally use pyrotechnic pin pullers, which have the problem of excessive unlocking impact, and can only be used once, and have gradually ...

AI Technical Summary

Problems solved by technology

Traditional pin pullers generally use pyrotechnic pin pullers, which have the problem of excessive unlocking impact, and can only be used once, and have gradually been replaced by non-pyrotechnic pin pullers with less impact (such as memory alloy pin pullers, etc.)

However, most of the existing memory alloy pin pullers directly provide the pin pulling force through the memory alloy. Due to the limitation of power consumption and material performance, the locking force that the memory alloy can provide is generally small, and the bearing capacity of the pin puller is also low. therefore restricted

In addition, after the memory alloy is heated by electricity, it can only be reset after cooling down for the next test. Although it can be used repeatedly, it is not convenient for actual use, especially for ground tests.

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