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Sandwich transducer type longitudinal and bending linear ultrasound motor with frequency-modulating variable-amplitude rod

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

Inactive Publication Date: 2009-07-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a sandwich transducer type longitudinal bending linear ultrasonic motor with a frequency modulation horn, which can solve the existing sandwich type longitudinal bending composite linear ultrasonic motors with low motor efficiency, high noise, serious wear, The problem of not being able to form product serialization

Method used

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  • Sandwich transducer type longitudinal and bending linear ultrasound motor with frequency-modulating variable-amplitude rod
  • Sandwich transducer type longitudinal and bending linear ultrasound motor with frequency-modulating variable-amplitude rod
  • Sandwich transducer type longitudinal and bending linear ultrasound motor with frequency-modulating variable-amplitude rod

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specific Embodiment approach 1

[0006] Specific implementation mode one: combine Figure 1 ~ Figure 3 Describe this embodiment, this embodiment is composed of a sandwich transducer and a driving foot 7; , thin copper sheet 6; the middle position on the stud 3 is provided with a flange 4, and the parts of the stud 3 located on both sides of the flange 4 are respectively equipped with piezoelectric ceramic sheet groups 5, piezoelectric ceramic Thin copper sheets 6 as electrodes are respectively installed between the piezoelectric ceramic sheets of the sheet group 5 and between the piezoelectric ceramic sheet group 5 and the end cover 2, and the piezoelectric ceramic sheet group 5 and the thin copper sheet 6 pass through the stud 3 It is fastened together with the large end of the end cover 2, and the small end of the end cover 2 is fixedly connected with the large end of the frequency modulation horn 1 through the driving foot 7, and the driving foot 7 is located at the antinode of the bending vibration mode. ...

specific Embodiment approach 2

[0008] Specific implementation mode two: combination figure 1 and figure 2 To illustrate this embodiment, a small conical hole 12 is drilled on the front side and the rear side of the flange 4 of this embodiment at the coincident points of longitudinal bending vibration nodes. As the clamping point of the pre-tightening force mechanism of the linear ultrasonic motor, it is used to apply the pre-tightening force to generate driving friction. Choosing to drill two small conical holes 12 at this position can 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

[0009] Specific implementation mode three: combination figure 1 and figure 2 This embodiment is described. The difference between this embodiment and the first embodiment is: this embodiment also adds a hard ceramic friction plate 13; 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

The invention relates to a sandwich transducer type longitudinal bending linear ultrasonic motor with a frequency modulation horn, which relates to a linear ultrasonic motor. Aiming at the problems of low motor efficiency, high noise and serious wear in the existing sandwich type longitudinal bending composite linear ultrasonic motor. The stud (3) of the present invention is equipped with a longitudinal bending vibration piezoelectric ceramic sheet and a thin copper sheet (6) and is affixed to the large end of the end cover (2) through the stud (3), and the small end of the end cover (2) The end is fixedly connected to the large end of the FM horn (1) through the driving foot (7), and the driving foot (7) and the bending vibration piezoelectric ceramic sheet (9) are respectively located at the antinode of the bending vibration mode. The piezoelectric ceramic sheet (9) is symmetrically divided into two upper and lower bending vibration piezoelectric ceramic sheets with opposite polarization directions, the polarization direction of the two adjacent bending vibration piezoelectric ceramic sheets, and the two longitudinal vibration piezoelectric ceramic sheets The polarization directions of the ceramic sheets (8) are all opposite, and the length L of the horn (1) is 1 / 2 the longitudinal vibration wavelength. The invention has the advantages of high efficiency, low noise and light wear.

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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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/02H02N2/04
Inventor 陈维山石胜君姚郁刘军考谢涛
Owner HARBIN INST OF TECH
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