An inertial piezoelectric ultrasonic motor

Abstract

The invention relates to an inertial piezoelectric ultrasonic motor which primarily comprises a moved workpiece, a jackscrew, a stator and a rotor, wherein the moved workpiece is mounted on a drivingmain body through the jackscrew, the stator is arranged below the rotor, and the jackscrew is in contact with the driving main body and applies a vertical pressure to the driving main body; the rotorcomprises a driving main body, driving feet and piezoelectric ceramics, the driving feet and the piezoelectric ceramics are arranged in pairs, thin walls are processed on two sides of the driving mainbody, the driving feet are arranged on the inner sides of the thin walls, the piezoelectric ceramics are arranged on the inner sides of the driving feet and are in contact with the same, the drivingmain body applies a horizontal pre-pressure to the driving feet and the piezoelectric ceramics in a converting manner through the thin walls, and the driving feet are in contact with the stator and have a vertical pre-pressure. The inertial piezoelectric ultrasonic motor can adjust the structural mode of a positive pressure between the stator and the rotor, and the structure is simplified and theresponsible ability is enhanced.

Description

technical field [0001] The invention relates to the field of ultrasonic motors, in particular to an inertial ultrasonic motor with adjustable pre-pressure between a stator and a mover, a simple structure and a large load capacity. Background technique [0002] With the rapid development of mechanical devices represented by robots, precision machinery continues to develop in the direction of high precision and high response speed. Traditional linear motors are mainly driven by coils. This method has many shortcomings, such as large volume, complex mechanism, low precision, low response speed, etc., and cannot meet the needs of modern precision machinery. [0003] In recent years, piezoelectric materials have been widely studied and applied at home and abroad due to their advantages such as fast response speed, large output force, good linearity, and immunity to electromagnetic interference. Making use of the characteristics of piezoelectric materials to make ultrasonic linea...

AI Technical Summary

Problems solved by technology

[0005] Disadvantages of this scheme: 1. The pre-pressure between the mover and the stator cannot be adjusted effectively

The inertial ultrasonic motor uses the form of inertial force and friction to do work to realize the non-uniform motion of the stator. Since the pre-pressure between the mover and the stator cannot be effectively adjusted, the friction during the period cannot be effectively adjusted;

[0006] 2. Limited load capacity

Due to the inability to effectively control the friction, the ability of the mover to carry the load is limited

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