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Single-vibrator excited dual-traveling wave rotary ultrasonic motor

A technology of ultrasonic motor and single vibrator, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motor, generator/motor, electrical components, etc., to achieve the effect of reducing overall cost, reducing volume and increasing torque

Active Publication Date: 2017-03-29
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can improve the contact characteristics of the stator and rotor of the traditional traveling wave rotating ultrasonic motor, improve its output performance; and can solve a series of problems introduced by the existing double traveling wave rotating ultrasonic motor due to the need for voltage excitation on both the stator and rotor

Method used

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  • Single-vibrator excited dual-traveling wave rotary ultrasonic motor
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  • Single-vibrator excited dual-traveling wave rotary ultrasonic motor

Examples

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Embodiment Construction

[0025] Such as figure 1 As shown, a preferred embodiment of the present invention provides a double traveling wave rotary ultrasonic motor excited by a single vibrator, including a rotor 1, a stator 2, a stator base 3, a base bearing 4, a preload coupling seat 5, a preload Tighten bolt 6 and rotor output shaft 7. The rotor 1 is installed at the bottom of the rotor output shaft 7; the stator 2 is installed at the top of the stator base 3; the bottom of the stator base 3 is provided with a bearing installation hole. The bearing 4 is installed in the bearing installation hole, and the pre-tightening connecting seat 5 is installed in the inner hole of the base bearing 4 through interference fit and connected with the rotor output shaft 7; the pre-tightening bolt 6 passes through the inner hole of the pre-tightening connecting seat 5 and The rotor output shaft 7 is fastened and screwed. A double traveling wave rotary ultrasonic motor excited by a single vibrator in a preferred e...

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PUM

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Abstract

The invention discloses a single-vibrator excited dual-traveling wave rotary ultrasonic motor. The single-vibrator excited dual-traveling wave rotary ultrasonic motor comprises a rotor, a stator, a stator base, a base bearing, a pre-tightened connecting base, a pre-tightened bolt and a rotor output shaft; the rotor is arranged at the bottom end of the rotor output shaft; the stator is arranged at the top end of the stator base; the base bearing is arranged at the bottom end of the stator base; the pre-tightened connecting base is arranged in an inner hole of the base bearing and is connected with the rotor output shaft; and the pre-tightened bolt penetrates an inner hole of the pre-tightened connecting base and is screwed with the rotor output shaft. The rotor and the stator have a consistent inherent frequency. Two phases of traveling waves with same vibration type and consistent direction of propagation can be generated on the rotor and the stator respectively only by carrying out power supply excitation on the stator when the motor works. The single-vibrator excited dual-traveling wave rotary ultrasonic motor improves the output performance of the traditional traveling wave rotary ultrasonic motor and overcomes a series of problems caused by voltage excitation for the rotor in the existing dual-traveling wave rotary ultrasonic motor.

Description

technical field [0001] The invention relates to the field of ultrasonic motors, in particular to traveling wave rotating ultrasonic motors. Background technique [0002] Ultrasonic motors, especially traveling-wave rotating ultrasonic motors, have broken through the limitations of the working principle of traditional electromagnetic motors. They use the inverse piezoelectric effect of piezoelectric materials to convert the microscopic vibration of the stator particles into the macroscopic rotational motion of the rotor. It has fast response, With the advantages of low speed, high torque, high power density, and no electromagnetic interference, it has been widely used in precision machinery fields such as aerospace, laser instruments, and lens focusing. The traditional traveling wave rotary ultrasonic motor generates friction to drive the rotor through the extrusion of the rotor at the peak of the stator’s up-going wave. The disadvantages of low mechanical conversion efficien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/16
CPCH02N2/163
Inventor 杨明安大伟徐郎特吴昊宇
Owner SHANGHAI JIAO TONG UNIV
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