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Miniature two-degrees-of-freedom plane motion piezoelectric motor

A piezoelectric motor and planar motion technology, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problems of large volume and complex structure, and meet the requirements of volume , fast response, light weight effect

Active Publication Date: 2010-11-24
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, all these reported two-degree-of-freedom piezoelectric ultrasonic motors integrate multiple piezoelectric drivers to achieve two-dimensional motion, so there are defects in large volume and complex structure.

Method used

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  • Miniature two-degrees-of-freedom plane motion piezoelectric motor
  • Miniature two-degrees-of-freedom plane motion piezoelectric motor
  • Miniature two-degrees-of-freedom plane motion piezoelectric motor

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Experimental program
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Embodiment Construction

[0019] In the following, the present invention will be further described through embodiments with reference to the accompanying drawings.

[0020] by figure 1 It can be seen that the miniature two-degree-of-freedom piezoelectric motor 10 shown has a piezoelectric driver 20, which is made of a cylindrical piezoelectric ceramic rod 21, which is bonded at the center of the end face of the piezoelectric ceramic rod 21 Friction block 22; The friction block 22 can be a spherical, hemispherical, or cylindrical wear-resistant material, which is bonded and compounded with the piezoelectric ceramic 21 by epoxy resin. The motor 10 also includes a sliding block 30. The main plane of the sliding block 30 is parallel to the plane where the friction block 22 is located, and is limited to move parallel to the plane. The friction block 22 is in frictional contact with the sliding block 30, which is achieved by the pre-pressure generated by a spring 50 (or other elastic mechanism).

[0021] figur...

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PUM

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Abstract

The invention discloses a miniature two-degrees-of-freedom plane motion piezoelectric motor, and belongs to the technical field of precise driving elements. The key technology of the invention is that a piezoelectric driver consists of a piezoelectric ceramic bar, a piezoelectric ceramic tube or a square column piezoelectric single crystal, wherein the piezoelectric ceramic bar, the piezoelectric ceramic tube or the square column piezoelectric single crystal is excited to perform an elliptical resultant movement in a first order length extension vibration mode along a Z axial direction and a second order curving vibration mode along an X direction and the elliptical resultant movement in the first order length extension vibration mode along the Z axial direction and in the second order bending vibration mode along a Y direction; and the two elliptical resultant movements are orthogonal with each other to drive a sliding block to move along an X direction or a Y direction respectively. The motor has the advantages of meeting requirements of indexes such as small volume, light weight, simple structure and the like, along with fast response, high precision and the like.

Description

Technical field [0001] The invention belongs to the technical field of precision drive elements, and specifically relates to a miniature piezoelectric motor. Background technique [0002] Compared with traditional electromagnetic motors, piezoelectric micro motors and piezoelectric actuators have shown many unique advantages, especially in the small size (mm-cm) range, such as relatively high power density, large Driving force, and relatively high efficiency. Traditional electromagnetic motors have become difficult to manufacture in dimensions of several millimeters, and its efficiency is only a few percent (<8%) when the dimensions are several millimeters, because it lacks a sufficiently strong magnetic field . The efficiency of piezoelectric motors is basically independent of size, and there is no magnetic field problem. Piezoelectric motors can maintain low speed and relatively large torque characteristics even in millimeter sizes. As precision driving components, piezo...

Claims

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Application Information

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IPC IPC(8): H02N2/00
Inventor 董蜀湘郭明森陈治江
Owner PEKING UNIV
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