Coupled-mode ultrasonic motor based on co-directional eccentric constraints and baroelectric ceramics

Abstract

The invention provides a coupled mode ultrasonic motor based on the same direction eccentric constraint and barotropic electric ceramics, which includes a stator unit, an upper mover and a lower mover, and the upper mover and the lower mover are respectively arranged on the upper and lower sides of the stator unit. On the side, the stator unit includes a metal elastic body, a right end oblique piezoelectric ceramic, a left end oblique piezoelectric ceramic, an upper driving foot and a lower driving foot, and the left and right ends of the metal elastic body are respectively provided with a right end oblique piezoelectric ceramic and a left end oblique piezoelectric ceramic , the positive cross-sections of the right-end baroclinoelectric ceramics and the left-end baroclinoelectric ceramics are parallelograms, the upper and lower sides of the metal elastic body are respectively provided with upper and lower drive feet, and the upper and lower drive feet are respectively set on the metal The flexural vibration amplitude of the elastic body is the largest; by relying on the eccentric constraint in the same direction, the stator unit produces the coupling mode shape of the first-order longitudinal vibration and the second-order flexural vibration, so no mode degeneracy is required, the structure is compact and the design is relatively simple .

Description

technical field [0001] The invention relates to a coupling-mode ultrasonic motor based on the same-direction eccentric constraint and a slope piezoelectric ceramic. Background technique [0002] For linear ultrasonic motors, it can be divided into single-mode linear ultrasonic motors and multi-mode linear ultrasonic motors. For multi-mode linear ultrasonic motors, longitudinal-bend composite, longitudinal-torsion composite, and bend-bend composite are widely used at present, and the research has been relatively complete. [0003] However, the above-mentioned composite linear ultrasonic motor needs to adjust the size of the stator unit to shorten the frequency of the two required vibration modes to achieve mode degeneracy, so that two working modes can be simultaneously excited at the same frequency to form a composite mode. State, so the design is more complicated. [0004] The above-mentioned problems should be considered and solved in the design and production process of...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a coupled-mode ultrasonic motor based on co-directional eccentric constraints and slope piezoelectric ceramics to solve the problem in the prior art that the size of the stator unit needs to be adjusted to shorten the vibration modes required for the two types of work. Mode degeneracy can be achieved at a frequency of 1000, so that two operating modes can be simultaneously excited at the same frequency to form a composite mode, which leads to complex structural design problems

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