An unlocking device using shape memory material

Abstract

The invention provides an unlocking device made of a shape memory material and belongs to the field of space technology. By the adoption of the unlocking device made of the shape memory material, the problems that impulse is high, potential pollution hazards exist, the structural size is large, and redundant matter is generated are solved. The unlocking device made of the shape memory material comprises a screw, a spring, an axial check ring, a split washer, a base and an elastic pin. The spring is compressed and fixed to the upper bottom surface of the screw. The spring is sleeved with the axial check ring. The inner diameter of the spring is larger than the radius of the screw. The split washer is located between the screw and the axial check ring and between locating shaft shoulder of the screw and the base. At least one of the matched surfaces between the base and the split washer is a conical surface, and at least one of the matched surfaces between the shaft shoulder on the head of the screw and the split washer is a conical surface. The spring exerts axial force on the axial check ring and the screw, the axial check ring moves upwards along the screw, the split washer is free of radial constraint, the locating shaft shoulder of the screw exert the axial force on the split washer, and then the split washer moves in the radial direction. By the adoption of the unlocking device made of the shape memory material, no redundant matter is generated, an extra collecting device is not needed, a small structure is achieved, no pollution is caused, smoke leakage is not caused, and the problem of hidden danger caused by smoke leakage of initiating explosive devices is avoided.

Description

technical field [0001] The invention belongs to the field of aerospace technology, and relates to an unlocking device suitable for space payload release, in particular to an unlocking device using a shape memory material. Background technique [0002] In order to realize the in-orbit static structure connection, the connection structure of the space optical remote sensor and the satellite platform adopts a combined connection method of rigid connection and unlockable connection. Before launch, the remote sensor is connected to the satellite platform at multiple points to ensure that the connection between the remote sensor and the satellite platform has a high dynamic stiffness and reduce the dynamic response of the remote sensor during the satellite launch; The detonation unlocking can unlock the connection device, realize the static structure connection between the remote sensor and the satellite platform, reduce the additional external force of the satellite platform on t...

AI Technical Summary

Problems solved by technology

However, the impact of high impact and possible smoke leakage during pyrotechnic detonation on the imaging quality of electronic devices and optical remote sensors cannot be ignored

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