A split nut type separation mechanism based on memory alloy wire driving rotary unlocking

Abstract

The application discloses a split nut type separation mechanism based on memory alloy wire driving rotation unlocking, and the split nut has a folding state and a separation state. In the folding state, the split nut is limited in the radial direction by the inner circle of a rotating sleeve. When the separation mechanism is unlocked and separated, a separation driving part pushes the split nut to open radially along the guide groove of a guide disc. A rotation driving part is arranged between the rotating sleeve and a center positioning disc, a limiting structure for limiting the rotation of the rotating sleeve is arranged between the limiting part and the rotating sleeve, and the limiting part is connected with a limiting retaining part. The limiting part is connected with a memory alloy wire. The memory alloy wire drives the limiting part to move axially away from the rotating sleeve in the electrified state, and the limiting structure is released from the limitation. In the released state, the rotation driving part drives the rotating sleeve to rotate counterclockwise, and the rotating sleeve is released from the radial constraint on the split nut. Therefore, the unlocking and resetting are smooth, and the risk of jamming in the unlocking and resetting caused by the steel ball locking is avoided.

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