Wire winding type driving mechanism for shape memory alloy wire

Abstract

The invention belongs to the technical field of shape memory alloy applications, and in particular relates to a shape memory alloy wire winding drive mechanism. Shape memory alloy wire winding drive mechanism, including panel 1, several pulleys 2, fixed end 3, displacement output end 4, tension spring 5 and mechanically trained shape memory alloy wire 6; shape memory alloy wire 6 One end is fixed on the fixed end 3, and several pulleys 2 are wound around, the other end is connected to the displacement output end 4, energized and heated, the shape memory alloy wire 6 recovers and shrinks, and the shape memory alloy wire 6 passes through the pulley 2 6. The return displacement of the different broken lines bypassing the pulley 2 is well transmitted to the displacement output terminal 4 to realize the displacement output and realize the purpose of the shape memory alloy wire outputting a large driving displacement in a small space. The structure of the invention is simple, reliable and miniaturized, and can be widely applied in industrial fields such as mechanical electronics and automation.

Description

technical field [0001] The invention belongs to the technical field of shape memory alloy applications, and in particular relates to a shape memory alloy wire winding drive mechanism. Background technique [0002] The traditional driver is driven by a motor system, which has a complex structure, large volume, high cost, and is prone to electromagnetic interference, so its application field is greatly limited. The shape memory alloy driver usually uses the shape memory effect of the shape memory alloy to return to its original shape by heating to generate the recovery displacement and recovery force, and perform external work to achieve the purpose of driving. It has the advantages of simple structure, reliability, no noise, and no electromagnetic interference. At present, among the shape memory alloys, nickel-titanium memory alloy has the best shape memory performance, and its optimal recovery strain is about 8%, but in practical applications, its recovery strain is about 5-...

AI Technical Summary

Problems solved by technology

At present, among the shape memory alloys, nickel-titanium memory alloy has the best shape memory performance, and its optimal recovery strain is about 8%, but in practical applications, its recovery strain is about 5-6%. Tens of thousands to millions of repeated driving and mechanism reliability, the recovery strain is usually designed to be 2 to 4%. Simply put, the recovery shift of a shape memory alloy wire with a length of 100mm is 2 to 4mm when it is heated and recovered after deformation. Therefore, when the driving mechanism requires a larger driving displacement, the length of the shape memory alloy wire is also longer, requiring a larger space

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