Shape memory alloy separation driving mechanism

Abstract

The invention discloses a shape memory alloy separation driving mechanism, and belongs to the technical field of aircraft separation. The mechanism comprises a shape memory alloy pin puller, a drivingspring, a driving shaft, a large pressing screw, a steel ball, a locking spring, a locking cylinder, a small pressing screw, a body and a pressing screw. The shape memory alloy pin puller is composedof a pin shaft, a spring, a pin puller pressing screw, a shell, a shape memory alloy sleeve and a wire. The shape memory alloy pin puller is designed into an indirect driving mechanism, and the locking spring, the locking cylinder and the small pressing screw form a locking mechanism and a transmission mechanism; through the cooperation with the steel ball, positive pressure transmitted by the driving spring to the shape memory alloy pin puller is attenuated, and the action reliability of the whole mechanism is improved. The mechanism has the advantages of being large in driving force, largein stroke and the like. The whole separation mechanism can be recycled, so that the use efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of aircraft separation, in particular to a separation mechanism driven by a shape memory alloy. Background technique [0002] With the rapid development of aircraft technology. The tasks undertaken by the aircraft tend to be diversified and complicated, and the aircraft often needs to release special payloads. How to reliably realize the separation of the payload and the aircraft is the key to the technology. [0003] At present, in the separation technology used for aircraft, the propellant driven by gunpowder is commonly used, and the propellant mainly uses the gas generated by the combustion of gunpowder to drive the piston to perform work. To realize the reliable action of the pusher, it is necessary to require its driving force and stroke to be large, so that the content of gunpowder must increase, and the impact load during action is very large, often causing damage to the aircraft and the load to be...

AI Technical Summary

Problems solved by technology

In order to realize the reliable action of the pusher, it is necessary to require a large driving force and a large stroke, so that the content of gunpowder will inevitably increase, and the impact load during action will be very large, often causing damage to the aircraft and the load to be released.

Moreover, the gunpowder pusher is a one-time use product. After the function, the entire separation mechanism will be scrapped, resulting in a waste of resources.

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