a reciprocating mechanism

Abstract

The invention discloses a reciprocating mechanism which comprises a motion unit and two constraint and constraint release units connected to the two ends of the motion unit respectively. The motion unit comprises a compression spring, an upper sliding block, a lower sliding block, a dielectric elastomer, conductive electrodes and heat-shrinkable tubings. The compression spring is fixed into a threaded hole between the upper sliding block and the lower sliding block. The dielectric elastomer is wound around the upper sliding block, the compression spring and the lower sliding block after being stretched. The two ends of the dielectric elastomer are embedded into annular grooves in the upper sliding block and the lower sliding block respectively and are fastened through the heat-shrinkage tubings. The inner and outer surfaces of the dielectric elastomer are coated with the conductive electrodes. Each constraint and constraint release unit comprises a driving unit, constraint sleeves and a shell, wherein the two constraint sleeves can move inside a groove in the shell under the drive of the driving unit, and the driving unit is the same as the motion unit in structure. The motion unit and the two constraint and constraint release units are controlled to be powered on or powered off to achieve reciprocating motion, and the reciprocating mechanism has the advantages of being high in response speed, large in displacement, good in flexibility and reliable in positioning.

Description

technical field [0001] The invention relates to the technical field of actuators, in particular to a reciprocating mechanism. Background technique [0002] The actuation methods of traditional actuators mostly adopt mechanical actuation, motor actuation, and hydraulic actuation. These traditional actuators have problems such as long response time, complex mechanical structure, high noise, poor flexibility, and poor bionic performance. In addition to traditional actuators, in recent years, researchers have developed many actuators based on new functional materials such as shape memory alloys and magnetostrictive materials. However, shape memory alloy actuators have a long response time. , A large amount of heat is generated during movement, etc. Magnetostrictive actuators have defects such as small displacement, low positioning reliability, inflexible structure, poor impact resistance, and difficulty in non-linear motion. [0003] Jia Baoxian, Liu Yonghong, and Yang Yi discl...

AI Technical Summary

Problems solved by technology

However, there are low frequency of action and slow moving speed. To improve its reaction speed, an additional cooling system is required, resulting in complex structure and high cost.

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