Novel piezoelectric ceramic actuator

Abstract

The invention discloses a novel piezoelectric ceramic actuator. The novel piezoelectric ceramic actuator comprises a protection casing, wherein the protection casing is internally provided with multiple vibration units, each vibration unit comprises a first vibration board, a first contact, a first ceramic oscillator, a second vibration board, a second contact and a second ceramic oscillator, thefirst contact is arranged between the first ceramic oscillator and the first vibration board, two ends of the first contact are connected with the first vibration board and the first ceramic oscillator, the second contact is arranged between the second ceramic oscillator and the second vibration board, and two ends of the second contact are connected with the second vibration board and the secondceramic oscillator. The novel piezoelectric ceramic actuator is advantaged in that the lamination structure is employed to make the vibration effect be better, strong vibration is realized, and high vibration force requirement can be satisfied.

Description

Technical field [0001] The invention relates to the technical field of micro-drive applications, in particular to a new type of piezoelectric ceramic actuator. Background technique [0002] At present, the existing piezoelectric actuator products on the market are mostly single ceramic vibrators, and their vibration is relatively small, which cannot meet the demand for high vibration force, and a single ceramic vibrator has no external protection during use and is easily damaged. , And the sensitivity to temperature and humidity is relatively high. Under high temperature and high humidity and other working conditions, its electrical performance will change accordingly, and the stability of the product will also be unstable. For industries that require high product stability, as well as instruments and equipment used in harsh environmental conditions, there is an urgent need for a piezoelectric actuator with greater vibration force and stable characteristics to make up for the mar...

AI Technical Summary

Problems solved by technology

[0003] However, on the one hand, because the piezoelectric ceramic actuator adopts a laminated structure in order to achieve a large driving range, and it is a hard and brittle ceramic material, it is often used due to uneven force on the end face and shearing on the side. Factors such as force, bending moment, torque, vibration, impact and inertial force cause damage to piezoelectric ceramics, making the wear rate of piezoelectric ceramics very high

On the other hand, due to the hysteresis and creep characteristics of piezoelectric ceramics, the displacement output is nonlinear during the movement process, and the movement accuracy is poor.

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