Parallel bearingless co-rotating standing wave type linear ultrasonic motor

An ultrasonic motor, co-rotation technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problems of complex structure design and difficulty in realizing co-rotation , to achieve the effect of compact motor structure, high output and compact structure

Active Publication Date: 2019-05-03
NANJING INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a parallel bearingless co-rotating standing wave linear ultrasonic motor to solve the problems existing in the prior art or the structural design is relatively complicated, or it is difficult to realize co-rotation

Method used

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  • Parallel bearingless co-rotating standing wave type linear ultrasonic motor
  • Parallel bearingless co-rotating standing wave type linear ultrasonic motor
  • Parallel bearingless co-rotating standing wave type linear ultrasonic motor

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Embodiment

[0044] A parallel bearingless co-rotating standing wave linear ultrasonic motor, such as figure 1 , including a stator and a rotor, the rotor includes an inner rotor 4 and an outer rotor 1, the inner rotor 4 and the outer rotor 1 are fixed together, the stator is arranged between the inner rotor 4 and the outer rotor 1, and the stator includes a stator unit 3 and a squirrel-cage fixed structure 2. The stator unit 3 includes an elastic body 35, a piezoelectric ceramic at the left end 36 and a piezoelectric ceramic at the right end 37. The elastic body adopts an arc-shaped structure. The two ends of the body are respectively provided with a left end piezoelectric ceramic 36 and a right end piezoelectric ceramic 37, and the left end piezoelectric ceramic 36 and the right end piezoelectric ceramic 37 respectively adopt piezoelectric ceramics polarized in the radial direction; In the electric field, the ceramic torsional vibration mode is used to excite the stator elastic body to g...

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Abstract

The invention provides a parallel bearingless co-rotating standing wave type linear ultrasonic motor. The motor comprises a stator and a rotor, and the rotor comprises an inner rotor and an outer rotor. The inner rotor and the outer rotor are fixed together, and the stator is arranged between the inner rotor and the outer rotor. The stator comprises a plurality of stator units and a mouse cage type fixing structure. Each stator unit comprises an elastic body, a left-end piezoelectric ceramic and a right-end piezoelectric ceramic. Each elastic body adopts an arc-shaped structure, and the two ends of each elastic body are respectively provided with the corresponding left-end piezoelectric ceramic and the corresponding right-end piezoelectric ceramic. Two inner driving feet are arranged on the inner surface of each elastic body and make contact with the inner rotor, and two outer driving feet are arranged on the outer surface of each elastic body and make contact with the outer rotor, wherein the inner driving feet and the outer driving feet deviate from stator unit standing wave node positions in the same direction and at the same radian. Compared with a currently popular linear ultrasonic motor, the motor is free of bearings and compact in structure, employs a mode that double rotors rotate and drive in the same direction, and achieves the double output.

Description

technical field [0001] The invention relates to a parallel bearingless co-rotating standing wave linear ultrasonic motor. Background technique [0002] There are two types of standing wave linear ultrasonic motors, one is a composite mode motor, and the other is a single mode motor. When the former works, there are two modes in the stator, so its structural design is relatively complicated. When the latter works, only one mode is used, so the design is relatively simple, but its driving direction is unidirectional. The stator structure of the standing wave linear ultrasonic motor is generally a straight line, and its output is also generally a straight line. [0003] At present, the existing standing wave linear ultrasonic motors have the problems of relatively complicated structural design or difficulty in achieving co-rotation. [0004] The above problems should be considered and solved in the design process of the standing wave linear ultrasonic motor. Contents of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/02H02N2/04
Inventor 陆旦宏林秋香张仰飞郝思鹏刘海涛蒋春容胡霞
Owner NANJING INST OF TECH
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