Double-driving foot sandwich converter type longitudinal and bending linear ultrasonic motor

A technology of linear ultrasonic motors and transducers, applied in the direction of generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc., can solve the problems of inability to form product serialization, low motor efficiency, Noise and other problems, to achieve the effect of low noise, reduced loss and high efficiency

Inactive Publication Date: 2007-08-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a double-drive foot sandwich transducer type longitudinal bending linear ultrasonic motor, which can solve the problems of l

Method used

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  • Double-driving foot sandwich converter type longitudinal and bending linear ultrasonic motor
  • Double-driving foot sandwich converter type longitudinal and bending linear ultrasonic motor
  • Double-driving foot sandwich converter type longitudinal and bending linear ultrasonic motor

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specific Embodiment approach 1

[0007] Specific embodiment 1: This embodiment is described in conjunction with Fig. 1 to Fig. 3. This embodiment is composed of a sandwich transducer and a driving foot 7; , flange 4, piezoelectric ceramic sheet group 5, and thin copper sheet 6; the middle position on the stud 3 is provided with a flange 4 made integral with the stud 3, and the stud 3 on the left side of the flange 4 The upper and the studs 3 on the right side of the flange 4 are equipped with piezoelectric ceramic sheet groups 5 respectively, between the piezoelectric ceramic sheets of the piezoelectric ceramic sheet group 5 and between the piezoelectric ceramic sheet group 5 and the end cover 2 respectively. The thin copper sheet 6 is installed as an electrode, the piezoelectric ceramic sheet group 5 and the thin copper sheet 6 are fastened together with the end cover 2 through the stud 3, and the end cover 2 is fixedly connected with the large end of the frequency modulation horn 1, so The piezoelectric cer...

specific Embodiment approach 2

[0009] Specific embodiment two: this embodiment is described in conjunction with Fig. 1 and Fig. 2, two small conical holes 12 are drilled at the joints of the longitudinal bending vibration nodes of the outer cylindrical surface of the flange 4 of the present embodiment, as the pre-tightening force of the linear ultrasonic motor The gripping point of a mechanism used to apply preload to generate drive friction. Choose to drill two small conical holes 12 at this position to prevent resonance frequency drift and vibration distortion and reduce energy loss. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0010] Specific embodiment three: This embodiment is described in conjunction with Fig. 1 and Fig. 2. The difference between this embodiment and specific embodiment one is: this embodiment also adds a hard ceramic friction plate 13; the hard ceramic friction plate 13 Bond with the lower end surface of the driving foot 7. Such setting can prevent the driving foot 7 from wearing out and prolong the service life of the driving foot 7 .

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Abstract

A linear ultrasonic motor of sandwich transducer type with double driving- foot is prepared as firm-connecting longitudinal-flexural vibration piezoelectric ceramic wafer and thin copper plate with big end of end cover and FM variable amplitude rod, arranging two flexural piezoelectric ceramic wafers at vibration wave loop of flexural vibration for setting polarization directions of flexural and longitudinal vibration piezoelectric ceramic wafers, setting length of FM variable-amplitude rod to be 1/2 of longitudinal vibration wavelength and setting said driving foot at flexural vibration wave loop most near to FM variable-amplitude rod.

Description

technical field [0001] The invention relates to a linear ultrasonic motor and belongs to the technical field of piezoelectric ultrasonic motors. Background technique [0002] Ultrasonic motor is a motor that uses ultrasonic vibration energy and generates driving force through friction. It has the advantages of low speed and high torque (thrust), no need for a gear change mechanism, no electromagnetic interference, fast response, and self-locking when power is off. It is widely used as a piezoelectric driver. 2001 Japan "Applied Physics" magazine (Jpn.J.Appl.Phys) No. 40 p3773~3776 pages, titled "A High Power Ultrasonic Motor Using a Longitudinal and Bending Hybrid Bolt-Clamped Langevin Type Transducer" (a kind of bolt-clamped Langevin Type Transducer) A high-power ultrasonic motor with a sandwich-type longitudinal-bending composite transducer fastened) proposed a linear ultrasonic motor. Since the two sets of bending vibration ceramic plates are located at the two antinodes...

Claims

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Application Information

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IPC IPC(8): H02N2/02H02N2/04
Inventor 石胜君刘军考陈维山谢涛
Owner HARBIN INST OF TECH
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