Cantilever bending vibration transducer type cylindrical standing-wave ultrasonic motor vibrator
A technology of ultrasonic motors and transducers, which is applied in the direction of generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc., can solve the problems of restricted mechanical output capacity of motors, and achieve design Flexible, easy to control, and achieve the effect of torque output
Inactive Publication Date: 2011-06-08
HARBIN INST OF TECH
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Problems solved by technology
[0004] The purpose of the present invention is to solve the problem that the current ultrasonic motor vibrator is excited by the method of pasting piezoelectric ceramic sheets with metal elastic body, which restricts the mechanical output capacity of the motor, and provides a cantilever bending vibration transducer type cylindrical resident Ultrasonic motor vibrator
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specific Embodiment approach 1
[0015] Specific implementation mode one: the following combination Figure 1 ~ Figure 4 Describe this embodiment, this embodiment includes a cylinder 1, it also includes a cantilever bending vibration sandwich transducer 2, the cantilever bending vibration sandwich transducer 2 is composed of a cantilever 2-1, a fastening screw 2-2, four pieces of bending vibration Composed of piezoelectric ceramic sheet 2-3, four electrode sheets 2-4, two insulating sleeves 2-5, front end cover 2-6 and rear end cover 2-7,
[0016] The front end cover 2-6 and the rear end cover 2-7 are cuboids, and the fastening screw 2-2 passes through the central through hole of the front end cover 2-6 and the cantilever 2-1 to be screwed and fixed with the rear end cover 2-7, and the cantilever 2 -1 and the fastening screws 2-2 between the front end cover 2-6 and the rear end cover 2-7 are respectively covered with two bending vibration piezoelectric ceramic sheets 2-3, and each two adjacent bending vibrati...
specific Embodiment approach 2
[0021] Embodiment 2: This embodiment differs from Embodiment 1 in that the section of the bending vibration piezoelectric ceramic sheet 2 - 3 is rectangular. Other components and connections are the same as those in Embodiment 1.
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The invention relates to a cantilever bending vibration transducer type cylindrical standing-wave ultrasonic motor vibrator belonging to the technical field of piezoelectric ultrasonic motors and solving the problem that the mechanical output capability of a motor is restricted because the prior ultrasonic motor vibrator adopts a metal elastic body to bond piezoelectric ceramic thin plates to excite. The cantilever bending vibration transducer type cylindrical standing-wave ultrasonic motor vibrator comprises a cylinder and a cantilever bending vibration sandwich transducer which are connected into a whole by cantilevers, a fastening screw is fixedly screwed with a rear end cover after passing through central through holes of a front end cover and the cantilevers, two bending vibration piezoelectric ceramic plates are respectively sleeved among the cantilevers and the front end cover and the rear end cover, electrode plates are arranged among the bending vibration piezoelectric ceramic plates and between each cantilever and each bending vibration piezoelectric ceramic plate, the adjacent bending vibration piezoelectric ceramic plates have opposite polarization directions, the lefthalf plate and the right half plate of each bending vibration piezoelectric ceramic plate are symmetrically cut and combined again and have opposite polarization directions, and two bending vibrationpiezoelectric ceramic plates which are adjacent to the cantilevers have the same polarization direction. The cantilever bending vibration transducer type cylindrical standing-wave ultrasonic motor vibrator belongs to the field of manufacturing ultrasonic motors.
Description
technical field [0001] The invention relates to a cantilever bending vibration transducer type cylindrical standing wave ultrasonic motor vibrator, which belongs to the technical field of piezoelectric ultrasonic motors. Background technique [0002] Ultrasonic motor is a motor that uses ultrasonic vibration energy to generate driving force through frictional coupling. It uses the inverse piezoelectric effect of piezoelectric ceramics to excite vibrations in the ultrasonic frequency range in the elastic body, and then forms a particle motion with a specific trajectory at a specific point or area on the surface of the elastic body, and then through the friction between the stator and the rotor Coupling converts the microscopic motion of the particle into the macroscopic motion of the rotor. Ultrasonic motor is widely used as a piezoelectric driver because of its advantages such as low speed and high torque, no need for speed change mechanism, no electromagnetic interference,...
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IPC IPC(8): H02N2/00
Inventor 陈维山刘英想姚郁刘军考石胜君
Owner HARBIN INST OF TECH