Stepping actuator device driven by two piezoelectric ceramics and comprising E-type rail, and method

Abstract

The invention discloses a stepping actuator device driven by two piezoelectric ceramics and comprising an E-type rail, and a method. The actuator device comprises two fixed rails fixed on a pedestal and linked with the pedestal through a flexible hinge, a driving rail capable of moving up and down in a small range, and a clamping control-displacement output structure which is mounted between the fixed rails and the driving rail and can realize transition of a clamping state with the rails. The invention also providing an actuating method, the piezoelectric ceramics and a motor are driven according to a certain order, large stroke linear displacement output between the clamping output structure and the pedestal can be realized; the device has a power failure locking function, after power isfailed, the device can keep being in the current actuating position; and the actuator has the characteristics of large output stroke, high output resolution, light weight and simple control waveform.

Description

technical field [0001] The invention relates to an actuating device, in particular to an actuator and an actuating method thereof which are easy to process and implement, and can realize large-stroke displacement actuating output through two piezoelectric ceramic stepping drives. Background technique [0002] In recent years, the continuous development of piezoelectric actuators has supported the development and construction of important industries such as national defense, aerospace, and machinery manufacturing, and has also derived a wide variety of piezoelectric actuators. However, due to the shortcomings of piezoelectric materials with small actuating strokes, It is difficult for piezoelectric ceramic actuators to achieve large-stroke output, and it is necessary to use different working principles to achieve large-stroke displacement output. Therefore, a variety of inchworm-type actuating output structures are designed and proposed, so that the actuating device benefits ...

AI Technical Summary

Problems solved by technology

The above-mentioned patent adopts a new actuation principle in the design concept, which can reduce the number of piezoelectric ceramics and control commands, but the clamping structure used is not conducive to the stable clamping function of the actuator. The working force that can be output is small. For example, in the patent CN201310202370, a diamond-shaped ring with an inner and outer structure is designed for clamping. This structure has great flexibility, which is not conducive to ensuring the contact stiffness of the clamping structure. In CN201510061523, a line-surface contact structure is used for clamping, and the power output capability is not strong

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