Ceramic embedded type cylindrical traveling wave ultrasonic motor vibrator pretightened by using wedge blocks

An ultrasonic motor, embedded technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problems of low electromechanical coupling efficiency and difficulty in improving mechanical output capability. , to achieve the effects of high electromechanical coupling efficiency, improved mechanical output characteristics, and easy control

Inactive Publication Date: 2012-01-18
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 diff

Method used

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  • Ceramic embedded type cylindrical traveling wave ultrasonic motor vibrator pretightened by using wedge blocks
  • Ceramic embedded type cylindrical traveling wave ultrasonic motor vibrator pretightened by using wedge blocks
  • Ceramic embedded type cylindrical traveling wave ultrasonic motor vibrator pretightened by using wedge blocks

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specific Embodiment approach 1

[0019] Specific implementation mode one: the following combination Figure 1 to Figure 6 Describe this embodiment. The ceramic embedded cylindrical traveling wave ultrasonic motor vibrator using wedge-shaped preload in this embodiment includes metal substrates 1, 4n piezoelectric ceramic sheet pairs 2, 8n wedge blocks 3, 4n An electrode piece 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, and both axial ends of the cylinder 1-1 are provided with thin-walled rings 1-2 and flanges 1-3. 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] The inner surface of the cylinder 1-1 is uniformly processed with continuous comb-shaped driving teeth 1-4 along the circumferential direction, and the outer surface of t...

specific Embodiment approach 2

[0028] Specific implementation mode two: the following combination figure 1 This embodiment is described. 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.

specific Embodiment approach 3

[0029] Specific implementation mode three: the following combination figure 2 and image 3 This embodiment is described. This embodiment is a further description of Embodiment 1 or 2. The inclination of the side wall surface of the channel with an isosceles trapezoidal cross section is the same as the inclination of the slope of the wedge block 3 .

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Abstract

The invention relates to a ceramic embedded type cylindrical traveling wave ultrasonic motor vibrator pretightened by using wedge blocks, belonging to the technical field of piezoelectric ultrasonic motors. The problems of low electromechanical coupling efficiency and poor mechanical output capability of the traditional cylindrical traveling wave ultrasonic motor due to the d31 working mode of adopted piezoelectric ceramics are solved. The ceramic embedded type cylindrical traveling wave ultrasonic motor vibrator comprises a metal matrix, 4n piezoelectric ceramic piece pairs, 8n wedge blocks, 4n electrode pieces and 4n insulation spacers, wherein n is a natural number greater than or equal to 3. The application of pretightening and prepressing to the piezoelectric ceramic pieces is realized by using the wedge blocks, the piezoelectric ceramic pieces work in the d33 vibration mode with high electromechanical coupling efficiency, and the d33 vibration mode is a mode in which the ceramic pieces made stretching vibration along the thickness direction. The ceramic embedded type cylindrical traveling wave ultrasonic motor vibrator has high electromechanical coupling efficiency, and high torque output can be realized.

Description

technical field [0001] The invention relates to a vibrator of a ceramic embedded cylinder type traveling wave ultrasonic motor adopting wedge-shaped preload, and belongs to the technical field of piezoelectric ultrasonic motors. Background technique [0002] Piezoelectric ultrasonic motor is a kind of piezoelectric ultrasonic motor that uses the inverse piezoelectric effect of piezoelectric ceramics to excite vibration in the ultrasonic frequency range in the elastic body, and forms a particle motion with a specific trajectory at a specific point or area on the surface of the elastic body, and then passes through the stator, The frictional coupling between movers converts the microscopic motion of the particle into the macroscopic motion of the rotor. It has the advantages of low speed and high torque, no need for speed change mechanism, no electromagnetic interference, fast response speed and self-locking when power is off. The new driver has a very wide range of applicatio...

Claims

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Application Information

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IPC IPC(8): H02N2/12
Inventor 刘英想陈维山石胜君刘军考
Owner HARBIN INST OF TECH
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