Cylindrical traveling-wave ultrasonic motor vibrator pretightened by spring blocks

An ultrasonic motor, cylindrical technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problem of low electromechanical coupling efficiency and difficulty in improving mechanical output capacity problem, to achieve the effect of high electromechanical coupling efficiency, improved mechanical output characteristics, and stable performance

Active Publication Date: 2013-11-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the existing cylindrical traveling wave ultrasonic motor due to the use of piezoelectric ceramic d 31 Due to the problems of low electromechanical coupling efficiency and difficulty in improving the mechanical output capacity caused by the working mode, the present invention provides a cylindrical traveling wave ultrasonic motor vibrator with spring block preload

Method used

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  • Cylindrical traveling-wave ultrasonic motor vibrator pretightened by spring blocks
  • Cylindrical traveling-wave ultrasonic motor vibrator pretightened by spring blocks
  • Cylindrical traveling-wave ultrasonic motor vibrator pretightened by spring blocks

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specific Embodiment approach 1

[0019] Specific embodiment one: the following combination Figure 1 to Figure 6 Illustrating this embodiment, the cylindrical traveling wave ultrasonic motor vibrator using spring block preloading described in this embodiment includes a metal base 1, 4n piezoelectric ceramic sheets, 2, 4n spring blocks 3, 4n electrode sheets 4 and 4n insulating spacers 5, n is a natural number greater than or equal to three;

[0020] The metal base 1 is composed of a cylinder 1-1, two thin-walled rings 1-2 and two flanges 1-3. The axial ends of the cylinder 1-1 are respectively provided with a thin-walled ring 1-2 and a flange 1-2. 3. The thin-walled ring 1-2 is located between the cylinder 1-1 and the flange 1-3, and the central axes of the cylinder 1-1, the thin-walled ring 1-2 and the flange 1-3 coincide,

[0021] Continuous comb-shaped driving teeth 1-4 are uniformly processed along the circumferential direction on the inner surface of the cylinder 1-1, and 8n through grooves with rectang...

specific Embodiment approach 2

[0029] Specific embodiment two: the following combination figure 1 Describing this embodiment, this embodiment is a further description of Embodiment 1. The cylinder 1-1, the two thin-walled rings 1-2 and the two flanges 1-3 are integrated into one piece.

specific Embodiment approach 3

[0030] Embodiment 3: This embodiment is a further description of Embodiment 1 or Embodiment 2. The piezoelectric ceramic sheet pair 2 is polarized along the thickness direction to form two piezoelectric ceramic sheets of the same piezoelectric ceramic sheet pair 2 The polarization directions of the adjacent piezoelectric ceramic sheets are opposite to each other.

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Abstract

The invention relates to a cylindrical traveling-wave ultrasonic motor vibrator pretightened by spring blocks, which belongs to the technical field of piezoelectric ultrasonic motors, and solves the problems that electromechanical coupling efficiency is low and mechanical output capability is difficult to improve because a piezoelectric ceramic d31 working mode is adopted by the conventional cylindrical traveling-wave ultrasonic motor. The vibrator comprises a metal substrate, 4n piezoelectric ceramic sheet pairs, 4n spring blocks, 4n electrode sheets and 4n insulation spacers, wherein n is a natural number which is more than or equal to 3. The piezoelectric ceramic sheets are pretightened and subjected to pretightening force by the spring blocks, and the piezoelectric ceramic sheets work in a d33 vibration mode with high electromechanical coupling efficiency; and the vibrator has high electromechanical coupling efficiency and can output high moment.

Description

technical field [0001] The invention relates to a cylindrical traveling wave ultrasonic motor vibrator which is preloaded by a spring block, and belongs to the technical field of piezoelectric ultrasonic motors. Background technique [0002] Piezoelectric ultrasonic motor is a kind of using the inverse piezoelectric effect of piezoelectric ceramics to excite vibration in the ultrasonic frequency band in the elastic body, and form a particle motion with a specific trajectory at a specific point or a specific area on the surface of the elastic body, and then pass through the stator, The friction coupling between the movers converts the microscopic motion of the particles into the macroscopic motion of the rotor. The new drive has a very wide range of applications. [0003] Due to the simplicity of the excitation principle and the simplicity of the theoretical analysis method, most of the cylindrical traveling wave ultrasonic motors are excited by the way of pasting piezoelect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/12H02N2/16
Inventor 陈维山刘英想刘军考石胜君
Owner HARBIN INST OF TECH
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