A variable helical shape memory alloy rotating motor

Abstract

The invention provides a variable-pitch shape memory alloy rotary motor. The rotary motor uses a shape memory alloy helix as a drive element, one end of the shape memory alloy helix is connected with an output shaft through a given screw, the other end of the shape memory alloy helix is connected with a motor base through a fixing clamp, and the output shaft is fixed on the motor base through a bearing. The shape memory alloy helix is shaped at high temperature to form a pitch-diameter large-sized helix and is processed at low temperature to form a pitch-diameter small-sized helix and then installed in the motor, and the helix at the high temperature and the helix at the low temperature are identical in height. After a power supply is switched on, the shape memory alloy helix restores to the pitch-diameter large-sized helix at the high temperature due to the shape memory effect and drives the output shaft to perform rotary motion so as to output torque and a rotating angle, but the output shaft does not displaces axially. The variable-pitch shape memory alloy rotary motor is simple in structure, convenient to control, large in power density and high in energy utilization efficiency and can serve as a discontinuously-rotating power device definite in torque and rotating angle.

Description

Technical field [0001] The invention relates to the technical field of shape memory alloy motors, in particular to a shape memory alloy screw-driven rotating motor. Background technique [0002] Many mechanisms or systems require non-continuous rotation and output torque power output devices with a certain angle of rotation, such as the deployment of solar panels in spacecraft (the angle of rotation is generally within 180°), adaptive wing shape and angle of attack control, rotary wing aircraft Torsion control of the middle blade, etc. At present, this type of torque power output device mostly uses scroll springs or traditional motors. There are impacts and difficult to control during the unwinding process of the scroll springs. However, the traditional motors have complicated structures due to various factors such as reduction gears and electronic control. [0003] Shape memory alloys (SMA for short) are a new type of smart material. This material has a shape memory effect, a hig...

AI Technical Summary

Problems solved by technology

At present, this kind of torque power output device mostly adopts scroll springs or traditional motors. There are shocks and difficult control during the expansion of scroll springs. However, traditional motors have complicated structures due to various factors such as deceleration devices and electric control.

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