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Piezoelectric ultrasound motor

A piezoelectric ultrasonic and motor technology, which is applied in circuits, piezoelectric devices/electrostrictive devices, electrical components, etc., and can solve the problems of increased drive system size and complex manipulation.

Active Publication Date: 2009-06-17
PHYSIK INSTR PI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This structure leads to an increase in the size of the drive system in which the motor is employed, and complicates handling in the configuration

Method used

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  • Piezoelectric ultrasound motor
  • Piezoelectric ultrasound motor
  • Piezoelectric ultrasound motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The piezoelectric ultrasonic motor of the present invention comprises a piezoelectric vibrator 1 disposed in a casing 2, and an element 3 to be moved with a friction belt 4 attached thereto (refer to figure 1 ). Piezoelectric oscillator 1 with friction element 5 is elastically excited relative to friction strip 4 by means of pressure element 4 . The element 3 to be moved is fixed on a bearing seat 7 in the motor housing 2 so that it can move in the direction indicated by the arrow 8 .

[0025] exist figure 2 Among them, items 9 and 10 are the plan view and bottom view of the oscillator 1, respectively. The oscillator 1 is configured as a piezoelectric plate 11 having a length L, a height H, and a width B, and is divided into two identical parts 13 , 14 by a dividing surface 12 .

[0026] The dividing plane 12 passes through the center of the length L of the oscillator and is perpendicular to the large side 15 of the oscillator. The traces 16 dividing the plane 12 a...

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PUM

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Abstract

The present invention relates to a piezoelectric ultrasonic motor having an oscillator in the form of a piezoelectric plate of length L and height H, and one or two elastically extruded parts arranged on the oscillator and pressed against the friction surface of the part to be moved. Friction elements. According to the invention, the piezoelectric plate is divided into two identical parts by a section extending perpendicularly to the large surface, at least one of said parts comprising an asymmetrical generator of an asymmetrical acoustic standing wave, which generator generates an asymmetrical two The three-dimensional standing wave makes the friction element arranged in the center of the long end face of the plate move obliquely relative to the end face, so that the motion can be transmitted to the moving element.

Description

technical field [0001] The present invention relates to linear rotary piezoelectric ultrasonic motors. The invention can be used as an electric motor in general positioning systems as well as in fine positioning systems of plant technology. Background technique [0002] A piezoelectric ultrasonic motor with a metal resonator is known from US-PS 5672930, where the piezoelectric element is adhered to the metal resonator. It has been found disadvantageous that due to the different coefficients of thermal expansion of the metal resonator and the piezoelectric element it is not possible to achieve high mechanical powers with these motors. Also, metal resonators are passive bodies. In order to achieve high-speed motion, piezoelectric elements need to be excited by means of relatively high voltages. These disadvantages reduce the operational reliability of the motor and thus limit the fields of application of such motors. [0003] In addition to the above-mentioned piezoelectri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/09H10N30/20
CPCH02N2/026H01L41/0986H02N2/002H10N30/206
Inventor 沃拉迪米尔·韦什纽斯基阿里克斯·韦什纽斯基
Owner PHYSIK INSTR PI