Large-stroke actuator based on dielectric elastomer drive

Abstract

The invention discloses a large-stroke actuator based on dielectric elastomer drive, and belongs to the related technical field of actuators. Through matching operation of dielectric elastomer pushingpin devices, sliding blocks and stroke amplification units, on the basis of the characteristic that a dielectric elastomer extends after being powered on, pushing pins and sliding blocks are driven to move, moving of the sliding blocks is converted into relative rotation of two connecting rods of the stroke amplification units, the stroke amplification mechanism amplifies and transmits stroke ofthe sliding blocks into inserting and pulling parts, and inserting / pulling procedures of the inserting and pulling parts are finished. The actuator is simple in structure and easy and convenient to arrange, through the stroke amplifying mechanism, the sliding stroke of the sliding blocks can be greatly amplified, the whole process is easy to control, high in restorability and high in precision, through changing of the setting number of the stroke amplifying units and / or the sliding distance of the sliding blocks, changing of the stroke drive distance of the actuator is achieved, compatibilityof the actuator is greatly improved, the large-stroke control over the actuator can be achieved, and the good popularization and application value is achieved.

Description

technical field [0001] The invention belongs to the related technical field of actuators, and in particular relates to a large-stroke actuator driven by a dielectric elastic body. Background technique [0002] As a stroke control mechanism, actuators have been widely used in many fields, such as electromechanical systems and weapon systems; with the continuous development of modern industry and science and technology, more and more requirements have been put forward for the performance of actuators. The requirements make it continue to develop in the direction of miniaturization, large stroke, and high response speed. [0003] In the existing technology, most of the traditional actuators are based on electromagnetic or direct drive of gunpowder to complete the actuation process. Among them, the electromagnetic drive actuator is mainly composed of armature, yoke, wire package assembly, spring, pin, etc. A magnetic field is generated after the wire package assembly is energiz...

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Problems solved by technology

[0003] In the existing technology, most of the traditional actuators are based on electromagnetic or gunpowder direct drive to complete the actuation process. Among them, the electromagnetic-driven actuator is mainly composed of armature, yoke, wire package assembly, spring, pin, etc. , the magnetic field is generated after the wire package assembly is energized to magnetize the armature and the yoke made of soft magnetic materials, the magnetic force of the armature and the yoke overcomes the spring resistance, the movement of the armature drives the pin to move, and then completes the actuation process of the actuator. The structure often has problems such as small driving force and short driving stroke; while the gunpowder-driven actuator mainly uses the gas generated by the combustion of the gunpowder to drive the piston to do work, and the piston drives the pin to move to complete the actuation process of the actuator. However, affected by factors such as structure, gas pressure transmission direction and sealing, propellant actuators often have problems such as low reliability, low energy conversion efficiency, and poor safety in practical applications, and propellant-driven actuators are often one-time drives. , that is, the drive of the actuator is non-recoverable, so its application range is often limited, and it cannot be effectively applied to the application environment that requires cyclic drive, which has great limitations

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