Quadruped Non-resonant Piezoelectric Rotary Motor

Abstract

The invention discloses a four-foot non-resonant piezoelectric rotary motor, and belongs to the field of precise driving instruments. The four-foot non-resonant piezoelectric rotary motor comprises a machine case, wherein the machine case comprises a ceramic ring and end covers at two ends; a main shaft is arranged between the end covers; a drive mechanism is arranged in the ceramic ring and comprises a square fixed block, two pre-tightening bases and four drive feet; the square fixed block is fixed on the main shaft; the two pre-tightening bases are symmetrically arranged at two sides of the square fixed block; the four drive feet are divided into two groups, are symmetrically arranged at two sides of the fixed block, and are pressed on the fixed block by four pre-tightening bolts through eight laminated piezoelectric ceramics; and four groups of end parts of the drive feet are pressed on the friction ceramic ring along with wedging of two pre-pressing wedge blocks. According to the four-foot non-resonant piezoelectric rotary motor, the target of controlling the rotating speed and the accuracy is achieved through controlling the frequency and the amplitude of input voltage; compared with existing electromagnetic motor and resonant type piezoelectric rotary motor, the four-foot non-resonant piezoelectric rotary motor is adjustable in accuracy; high-thrust and fast movement can be achieved; and low-speed and high-accuracy positioning can also be achieved.

Description

technical field [0001] The invention relates to a piezoelectric rotary motor, specifically a quadruped non-resonant piezoelectric rotary motor, which belongs to the field of precision driving instruments. Background technique [0002] At present, ultra-precision drive and control technology is developing in the direction of intelligence, integration, diversification, and miniaturization. The piezoelectric precision driver using the inverse piezoelectric effect of piezoelectric materials has the advantages of high positioning accuracy, large output force, fast response speed, diverse structural shapes, flexible design, simple structure, easy miniaturization, direct drive, low energy consumption, The advantages of less heat generation, no need for lubrication and maintenance, can be used in vacuum, and not affected by magnetic fields stand out among many ultra-precision drives. [0003] Traditional piezoelectric rotating motors usually use piezoelectric ceramics to excite the...

AI Technical Summary

Problems solved by technology

Therefore, the working efficiency of this type of piezoelectric rotating motor is greatly affected by the frequency of the excitation signal, and the accuracy of the rotation is determined by the accuracy of the sensor, which cannot be adjusted; at the same time, the method of changing the speed by adjusting the frequency of the excitation signal cannot linearly adjust the speed. At the same time, the output force and output efficiency of the motor are greatly reduced

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