Large-torque continuous rotating type SMA motor

Abstract

The invention provides a large-torque continuous rotating type SMA motor. At least two drive units are installed on a main shaft in a series connection way, and the main shaft is driven to continuously rotate by sequentially actuating each drive unit. Each drive unit mainly comprises an SMA wire, a spring, a rotating disk, a ratchet wheel and a ratchet pawl, wherein one end of the SMA wire is installed on a ceramic support seat by a flattened stainless steel pipe, and the ceramic support seat is installed on an upper plate of the motor; the other end of the SMA wire is installed on the rotating disk by a ceramic pulley; one end of the spring is hung on the rotating disk, and the other end is installed on a bottom plate by an adjusting bolt; the ratchet pawl is installed on the rotating disk, simultaneously pressed by a spring sheet installed on the rotating disk and meshed with the ratchet wheel; and the ratchet wheel is installed on the main shaft by a key groove. The drive units areformed by the joint actuation of the SMA wire and the spring, and the output torque is large; the SMA wire is used as a drive element and has high energization heating efficiency; and the ratchet wheel and ratchet pawl connection is adopted between the main shaft and the rotating disk, and the one-way rotation is realized.

Description

technical field [0001] The invention relates to a mechanism designed by using the shape memory effect of SMA wire and the principle of friction ratchet, which can continuously rotate and output larger torque (compared to the common motor under the same weight). Background technique [0002] Many mechanisms or systems (such as spacecraft) need motors with a large power-to-weight ratio to drive, such as the opening of the cabin door of a spaceship, the angle adjustment of solar panels, and the steering of aircraft engine vector nozzles. At present, ordinary motors are mostly used in these places. However, they are bulky and heavy, which increases the flight cost of aerospace vehicles. In some places, due to the narrow installation space, a large output torque is required, and ordinary motors cannot be used at all. The focus of solving these problems is to use new materials (such as shape memory alloy, English abbreviation: SMA) to develop a new type of high power-to-weight rat...

AI Technical Summary

Problems solved by technology

[0008] The invention mainly solves the problems of small output torque and low heating efficiency in the prior art, and provides a new type of large torque continuous rotation SMA motor with large output torque and high heating efficiency

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