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Partition-excited three-degree-of-freedom ultrasonic motor vibrator

An ultrasonic motor, degree of freedom technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problems of material waste, insufficient utilization of ceramic materials, etc. Efficient usage, improved electromechanical coupling efficiency, easy-to-control effects

Active Publication Date: 2016-05-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is to solve the problem of insufficient utilization of ceramic materials in the existing three-degree-of-freedom ultrasonic motor, resulting in material waste, thereby providing a partition-excited three-degree-of-freedom ultrasonic motor vibrator

Method used

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  • Partition-excited three-degree-of-freedom ultrasonic motor vibrator
  • Partition-excited three-degree-of-freedom ultrasonic motor vibrator
  • Partition-excited three-degree-of-freedom ultrasonic motor vibrator

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specific Embodiment approach 1

[0017] Specific implementation mode one: the following combination figure 1 and figure 2 Describe this embodiment, the three-degree-of-freedom ultrasonic motor vibrator described in this embodiment includes two end caps 1, four piezoelectric ceramic sheets 2, flanges 3, two thin-walled beams 4, and two mounting seats 5. Two insulating sleeves 6 and ten electrode sheets 7;

[0018] The end cap 1 is a block with a threaded hole at one end and a counterbore at the other end. The upper edge of the counterbore is a spherical driving boundary, which is circular; two end surfaces of the flange 3 are respectively provided with a Studs 3-1, each stud 3-1 is covered with a pair of piezoelectric ceramic sheets 2, a pair of piezoelectric ceramic sheets 2 are pressed between the upper end cover 1 and the flange 3, and the lower end cover A pair of piezoelectric ceramic sheets 2 are compressed between the cover 1 and the flange 3; electrode sheets 7 are respectively fixed between the fla...

specific Embodiment approach 2

[0019] Embodiment 2: In this embodiment, the section-excited three-degree-of-freedom ultrasonic motor vibrator described in Embodiment 1 is further limited. In this embodiment, the cross-section of the piezoelectric ceramic sheet 2 is square or circular.

[0020] In this embodiment, this can simplify the processing and assembly process, and ensure that the characteristic frequencies of the two bending vibration modes of the vibrator are consistent.

specific Embodiment approach 3

[0021] Specific Embodiment 3: This embodiment further limits the section-excited three-degree-of-freedom ultrasonic motor vibrator described in Specific Embodiment 1. In this embodiment, the flange 3, stud 3-1, and two thin-walled beams 5 It has an integrated structure with two mounting seats 4.

[0022] In this embodiment, the processing and assembly process can be simplified in this way, and the thin-walled beam can realize elastic support and vibration isolation, thereby ensuring that the external installation has very weak influence on the vibration of the ultrasonic motor vibrator itself.

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Abstract

The invention discloses a partitioning stimulation type oscillator for a three-degree-of-freedom ultrasonic motor, relating to the technical field of piezoelectric ultrasonic motors. The oscillator is used for solving the problems that ceramic materials of an existing three-degree-of-freedom ultrasonic motor are not adequately utilized and are wasted. The oscillator has the beneficial effects that a piezoelectric ceramic element is in a sandwich structure and works in a high-electromechanical-coupling-efficiency d33 mode of piezoelectric ceramics, so that the electromechanical coupling efficiency of the oscillator is effectively increased, and the mechanical output capacity of the oscillator is improved; the flexible support and vibratory separation can be realized by virtue of a thin-wall beam, so that the influence level of the linkage between a mounting seat and other components on the bending vibration modal of the oscillator is minimally decreased; by only utilizing two pairs of piezoelectric ceramic pieces, the structure is simplified, and the ceramic materials are saved; all the piezoelectric ceramics in the oscillator are adequately stimulated in three driving modes of a sphere, so that the maximum use of the piezoelectric ceramics is realized. The partitioning stimulation type oscillator is applied to the technical field of the piezoelectric ultrasonic motors.

Description

technical field [0001] The invention relates 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 the rotors converts the microscopic motion of the particle into the macroscopic motion of the rotor, which has the advantages of low speed and high torque, no need for a speed change mechanism, no electromagnetic interference, fast response, and self-locking when power is off. [0003] The sandwich ultrasonic motor works in d33 mode with high electromechanical coupling efficiency of piezoelectric ceramics, which can effectively improve the mecha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/00H02N2/12
Inventor 陈维山杨小辉刘英想刘军考石胜君
Owner HARBIN INST OF TECH
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