Longitudinal-bending coupled linear ultrasonic motor based on counter-rotating eccentric stator

Abstract

The present invention provides a longitudinally bending coupled linear ultrasonic motor based on a different-direction eccentric stator, which includes a stator unit and a mover unit, the mover unit includes an upper mover and a lower mover, and the upper mover and the lower mover are respectively arranged Both sides of the stator unit, the stator unit includes metal elastic body, end piezoelectric ceramics, right upper protrusion, right lower protrusion, left upper protrusion, left lower protrusion, right upper driving foot, right lower driving foot, left upper driving foot and left lower The driving foot, the piezoelectric ceramics at the end include the piezoelectric ceramics at the right end and the piezoelectric ceramics at the left end, and the stator unit adopts a stator unit with anisotropic and eccentric mass; the motor forms the first-order longitudinal vibration and the second-order The coupling mode of bending vibration does not require mode degeneracy, and at the same time, using the coupling characteristics of the stator unit, the excitation of bending vibration mode and longitudinal vibration mode can be realized at the same time only by applying excitation in the bending vibration direction. The motor has a compact structure and a relatively simple design.

Description

technical field [0001] The invention relates to a longitudinal bending coupled linear ultrasonic motor based on a different-direction eccentric stator. Background technique [0002] For linear standing wave ultrasonic motors, it can be divided into single-mode linear ultrasonic motors and multi-mode linear ultrasonic motors. Among them, there are many types of multi-mode linear ultrasonic motors, such as longitudinal-bend composite, longitudinal-longitudinal composite, longitudinal-torsion composite, and bend-bend composite, and the current research has been relatively complete. [0003] However, these composite linear ultrasonic motors need to adjust the size of the stator unit to shorten the frequency of the vibration modes required for the two operations to achieve mode degeneracy, so that the two operating modes are simultaneously excited at the same frequency to form a composite Modal, so the design is more complicated. [0004] The above problems should be considered...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a longitudinal-bending coupled linear ultrasonic motor based on an eccentric stator in different directions to solve the problem in the prior art that the size of the stator unit needs to be adjusted to achieve the frequency of the vibration modes required for the two types of work. Mode degeneracy, so that two working modes are simultaneously excited at the same frequency to form a composite mode, which makes the structural design complicated

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