Inertial linear ultrasonic motor based on bending vibration of rectangular plate

Abstract

The invention discloses an inertial linear ultrasonic motor based on bending vibration of a rectangular plate, and belongs to the technical field of inertial linear ultrasonic motors. The motor comprises a stator, a bottom plate and a mover, wherein the stator comprises two rectangular flange-type vibrators and a drive rod; the two rectangular flange-type vibrators are symmetrical in structure; the drive rod is arranged on the symmetry axis of the stator; each flange-type vibrator comprises a front-end block, piezoelectric ceramic plates, a clamping part and a rear-end block, which are fixed through bolts; through holes which are articulated with the bottom plate through threads are formed in the clamping part; the piezoelectric ceramic plates are arranged at the wave crests of bending vibration; the two flange-type vibrators are connected with the drive rod through the front-end blocks; and the mover sleeves the drive rod. By the first-order bending vibration effect of a matrix vibrator and the vibration effect of the piezoelectric ceramic along the thickness direction, the motor structure is simplified; installation and adjustment are facilitated; the bending vibration is in a low-order mode, so that the vibration frequency is low; the included energy is high; increase of a vibration amplitude of the drive rod is facilitated; the utilization rate of vibration energy is improved; and a relatively good vibration effect is obtained.

Description

technical field [0001] The invention discloses an inertial linear ultrasonic motor based on the bending vibration of a rectangular plate, and belongs to the technical field of the inertial linear ultrasonic motor. Background technique [0002] The linear ultrasonic motor is a new type of micro-motor developed and applied rapidly in the 1980s. It uses the inverse piezoelectric effect of the piezoelectric element and the ultrasonic vibration of the elastic body, and through the friction between the stator and the mover, the elastic The micro-vibration of the body is converted into the macroscopic linear (rotational) motion of the mover, which directly pushes the load. It has the advantages of compact structure, high torque at low speed, fast response, high positioning accuracy and electromagnetic compatibility. It has broad application prospects in aerospace, weapon equipment and precision drive fields. [0003] At present, research on linear ultrasonic motors in China is de...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the deficiency of the above-mentioned background technology. An inertial linear ultrasonic motor based on the bending vibration of a rectangular plate is provided. The first-order bending vibration of the stator structure is excited by piezoelectric ceramics to increase its amplitude. Low motion efficiency and technical problems that a single power supply cannot drive the motor

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