Composite mode type linear ultrasonic motor based on end oblique piezoelectric ceramics

Abstract

The invention provides a composite mode type linear ultrasonic motor based on end oblique piezoelectric ceramics. The motor works in a longitudinal-torsional vibration mode and comprises a stator unitand a rotor unit, the rotor unit comprises an upper rotor and a lower rotor, the stator unit is arranged between the upper rotor and the lower rotor, the stator unit comprises a metal elastic body, an upper driving foot, a lower driving foot and the end inclined piezoelectric ceramics, and the upper driving foot is arranged on the upper surface of the metal elastic body. The lower driving foot isarranged on the lower surface of the metal elastic body, the end inclined piezoelectric ceramics comprise an upper right inclined piezoelectric ceramic, a lower right inclined piezoelectric ceramic,an upper left inclined piezoelectric ceramic and a lower left inclined piezoelectric ceramics, and the sections of the end inclined piezoelectric ceramics are parallelograms. The composite modal typelinear ultrasonic motor based on the end inclined piezoelectric ceramics is compact in structure, and can conveniently realize forward and reverse reversing operation under various composite modals and same-direction or two-way operation of the upper rotor and the lower rotor.

Description

technical field [0001] The invention relates to a composite mode linear ultrasonic motor based on an end inclined piezoelectric ceramic. Background technique [0002] At present, the common composite linear ultrasonic motor excites the longitudinal vibration and bending vibration of the elastic body through multiple sets of piezoelectric ceramic transverse vibration modes pasted on the surface of the stator unit, so that the elastic body works in the longitudinal-bending composite mode. The elliptical motion trajectory is synthesized at the driving foot to drive the mover to move. [0003] The existing composite linear ultrasonic motor has a complicated structure, and it is difficult to conveniently realize the same-direction or bi-directional operation of the upper mover and the lower mover. [0004] The above-mentioned problems should be considered and solved in the design and production process of the composite mode linear ultrasonic motor based on the end slope piezoele...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a compound mode linear ultrasonic motor based on the end inclined piezoelectric ceramics to solve the complex structure existing in the prior art, and it is difficult to conveniently realize the same or two-way operation of the upper mover and the lower mover The problem

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