Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Curve swing head supersonic mciro motor composed of multiple piezoelectric lamination pile transducer

A transducer and piezoelectric sheet technology, which is applied in the field of ultrasonic motor structure design, can solve the problem that the resonance frequency of the two signals of the motor is not degenerate, the upper and lower positions of the two piezoelectric sheets are different, and the thickness of the piezoelectric sheet cannot be too thin and other problems, to achieve the effect of excellent operating performance, degeneracy of resonance frequency, and promotion of miniaturization and industrialization

Inactive Publication Date: 2005-03-02
TSINGHUA UNIV
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by the conventional processing technology, the thickness of the piezoelectric sheet used in the motor should not be too thin (generally not less than 0.2mm). Because only one set of transducers is used, the upper and lower positions of the two piezoelectric sheets differ greatly, so the resonance frequency of the two signals of the motor is not degenerate, and the movement is not easy to stabilize, which limits the use of this motor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Curve swing head supersonic mciro motor composed of multiple piezoelectric lamination pile transducer
  • Curve swing head supersonic mciro motor composed of multiple piezoelectric lamination pile transducer
  • Curve swing head supersonic mciro motor composed of multiple piezoelectric lamination pile transducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The present invention has designed the first embodiment of the piezoelectric ultrasonic motor. In this embodiment, in addition to using multiple groups of piezoelectric lamination stack transducers as piezoelectric elements, other structures adopt the patented ultrasonic motor of the applicant. Similar structures, such as Figure 11 As shown, the motor is composed of a rotor 111 , a stator 112 and a central shaft 113 . Wherein, the stator 112 is composed of an upper matching block 1121 , a stack of multilayer piezoelectric ceramic laminations 1122 , electrode lead-out sheets 1123 , and a lower matching block 1124 . The rotor 111 is composed of a preload nut 1111 , a fixed bracket 1112 , a gear 1113 , a transition piece A1114 , a transition piece B1115 , a motor rotor 1116 and a preload spring 1117 .

[0037]The inner hole of the upper matching block 1121 is a threaded hole 11211, and it is connected with the screw part 1131 of the central shaft 113, and the screwing be...

Embodiment 2

[0052] The overall structure of the motor in this embodiment is an improvement on the structure of Embodiment 1, as Figure 12 As shown, the motor is composed of a rotor 121, a stator 122, and a central shaft 123. Among them, the stator 122 is composed of an upper matching block 1222, a friction material 1221 bonded to the upper end surface of the upper matching block 1222, a multilayer piezoelectric ceramic lamination stack 1223, an electrode lead-out piece 1224, a lower matching block 1225, and a clip with internal threads. Tight nut 1226 is formed. The rotor 121 is made up of a preload nut 1211 , a fixed bracket 1212 , a gear 1213 , a preload spring 1214 and a motor rotor 1215 .

[0053] The friction material 1221 and the upper matching block 1222 are connected together by epoxy resin glue, the inner hole of the upper matching block 1222 is a light hole, and a transition fit is maintained with the central shaft 123, which is realized by the end face of the flange 1232 on t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

This invention relates to a bending rocking ultrasonic micro-electric motor made of multiple group of piezoelectric sheets pile. It comprises: a central axle, a stator and a rotor slipped-over therewith, and a torque output part. The stator is composed of: an upper matching block, a converter, an electrode leading-out piece and a lower matching blocks. The converter is n pieces piezoelectric sheets (n>14), on the two surfaces of the sheet is divided into m electrodes (m>32) with different polarizing direction. All the sheets are put together to form a pile. Internal connection or external connection is used for connection between each layer electrodes. The simple signal excioted ones are parallel connected, then leading-out electrode; on the other hand, the coswt signal excites ones are also parallel connected then leading-out electrode. Advantages are: minimized, useful in biological, medical, micro-mechancial, national defance sciences fields.

Description

technical field [0001] The invention belongs to the field of ultrasonic applications, in particular to the structural design of miniaturized ultrasonic motors. Background technique [0002] The piezoelectric ultrasonic motor is a driving mechanism made of a specific structure using the inverse piezoelectric effect of piezoelectric materials. It is generally composed of functional components such as a stator, a rotor, and a pre-pressure mechanism. It uses the inverse piezoelectric effect of piezoelectric ceramics to generate ultrasonic vibrations on the surface of the stator, and the friction between the stator and the rotor drives the rotor to move. Ultrasonic motors have the following advantages over ordinary electromagnetic motors: [0003] 1. With low speed and high torque, it can directly drive the load without deceleration mechanism. [0004] 2. Small size, flexible structure, power volume ratio is 3-12 times that of electromagnetic motor. [0005] 3. Quick start and...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/12
Inventor 周铁英褚祥诚陈宇张力李龙土
Owner TSINGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com