Double-layer gear oppositely-pushing rotary type nanometer piezoelectric motor

Abstract

The invention provides a double-layer gear oppositely-pushing rotary type nanometer piezoelectric motor which comprises a shell. A rotor with two gears in the center, outer-layer piezoelectric ceramic heaps, inner-layer piezoelectric ceramic heaps, a power driving part and a one-way limiting piece are arranged in the shell. The power driving part is in transmission connection with the outer-layer piezoelectric ceramic heaps and the inner-layer piezoelectric ceramic heaps; the rotor with the double-layer gears in the center is composed of an outer-layer gear and an inner-layer gear, wherein the outer-layer gear is coaxial with the inner-layer gear, the module number of the outer-layer gear is the same as that of the inner-layer gear, the outer-layer gear of the rotor with the double-layer gears in the center is driven by the power output end of the outer-layer piezoelectric ceramic heaps, and the inner-layer gear of the rotor with the double-layer gears in the center is driven by the power output end of the inner-layer piezoelectric ceramic heaps. According to the double-layer gear oppositely-pushing rotary type nanometer piezoelectric motor, the piezoelectric ceramic heaps directly push the gears to rotate by extending in the radial direction, so that output efficiency is maximized, and the problems that torque of advance through frictional force is small and the energy loss is big are solved; the design of rotation and opposite pushing is adopted, operation of the motor is not limited by the stroke of the piezoelectric ceramic heaps, and the motor can rotate continuously at a high speed in a stepping mode.

Description

technical field [0001] The invention belongs to the technical field of design of nano-precision piezoelectric motors, in particular to a nano-precision piezoelectric motor of double-layer gears pushing and rotating each other. Background technique [0002] Since the birth of piezoelectric ceramics, researchers from various countries have been doing a lot of research and development around piezoelectric ceramic drivers. In the course of decades of research and development, countless novel ideas and ingenious design structures have been proposed, and are widely used in precision instruments and equipment, such as high-precision drive, displacement control, etc. The research on piezoelectric actuators is generally divided into two directions: one is in terms of materials, efforts are being made to find new piezoelectric materials and piezoelectric materials with composite structures to improve the mechanical and electrical properties of piezoelectric ceramics. The piezoelectri...

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Problems solved by technology

[0003] Combining the current piezoelectric motors, there are widespread problems such as low driving force or torque, nonlinearity, difficulty in precise control, limited stroke, complex structure, reduced reliability, difficulty in miniaturization, friction and other energy losses, and reduced energy efficiency. or defect

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