Rotary piezoelectric motor

An electric motor, rotary pressure technology, applied in electrical components, piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, etc. Slow and other problems, to achieve the effect of low cost, simple structure, and improved load capacity

Active Publication Date: 2018-08-03
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the ultrasonic motor works in the ultrasonic frequency band, it needs to be equipped with a dedicated high-frequency power supply. In most cases, the high-frequency power supply is much larger than the ultrasonic motor body, and the cost is higher, which limits the working range of the ultrasonic motor.
Quasi-static motors are widely used in the field of precision driving and positioning due to their ultra-high displacement accuracy, but they work in a non-resonant state, with low work efficiency and slow running speed

Method used

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Examples

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Embodiment 1

[0041] like figure 1 and figure 2 As shown, a rotary piezoelectric motor includes a double stator 7, a mover 1, a preload mechanism 5, a bearing seat 3, a stator seat 6 and a base 4; the double stator 7 is bonded by an inner stator 71 and an outer stator 72 Both the inner stator 71 and the outer stator 72 are provided with piezoelectric sheets; the outer cylindrical surfaces of the double stators 7 are in clearance fit with the stator seat 6, and the double stators 7 are bonded to the stator seat 6; the mover 1 passes through the The shaft 2 and the bearing are installed on the bearing seat 3, and the axial side of the mover 1 is in contact with the axial side of the inner stator 71; the preload mechanism 5 connects the bearing seat 3 and the stator seat 6; the bearing seat 3 and the stator seat 6 are both arranged on the base 4, and can slide on the base 4.

[0042] like Figure 3a , 3b As shown, the mover 1 is a disc 11, and the material of the mover 1 is aluminum; the ...

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Abstract

The invention discloses a rotary piezoelectric motor, and belongs to the technical field of precision driving and positioning. The rotary piezoelectric motor comprises double stators, an active cell,a pre-tensioning mechanism, a bearing seat, a stator seat and a base. The main body of the double stators is composed of a metal cross beam and a piezoelectric ceramic, an inner stator generates rotational vibration, an outer stator generates axial vibration, and the double stators are bonded together. The superposition of the vibration of the double stators generates the elliptical motion of a torus mass point of the inner stator, and an active cell shaft is driven to perform one-way rotational motion by friction. The rotary piezoelectric motor has the advantages that the working frequency islower, the working frequency is about 1000 hertz, and the requirement for a matched circuit is lower; the positioning accuracy is high, and the step angle can reach up to 0.01 degree; the structure is simple, the assembly is convenient, and the load capacity is large due to the contact of the whole torus.

Description

technical field [0001] The invention belongs to the technical field of precision driving and positioning, and specifically relates to a rotary piezoelectric motor. Background technique [0002] In recent years, piezoelectric motors have been widely used in precision drive and positioning, biotechnology, medical equipment, aerospace technology and other fields due to their small size, high power density, fast response, and no electromagnetic interference. Piezoelectric motors can be divided into ultrasonic motors and quasi-static motors according to the principle. Ultrasonic motors include traveling wave motors and standing wave motors. Traveling wave motors use multiple vibrators to form traveling waves on the surface of the stator, making the surface particles form elliptical motions, thereby Drive the mover to move; the standing wave motor uses mode merger or directly uses a single mode to make the particle on the driving foot form an elliptical motion or oblique motion to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/12H02N2/14
Inventor 贺良国郝赛赵小勇董玉革楚宇恒潘巧生赵杰徐磊
Owner HEFEI UNIV OF TECH
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