Longitudinal and flexural composite transducer type double cylinder-shaped traveling wave ultrasonic motor vibrator

A composite transducer, ultrasonic motor technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problem of reducing the mechanical output capability and controllability of ultrasonic motor. , the vibration trajectory distortion of the vibrator surface particles, the limitation of the mechanical output capacity of the ultrasonic motor, etc., to achieve the effect of improving the mechanical output capacity and controllability, flexible design, and large torque output

Inactive Publication Date: 2010-01-13
HARBIN INST OF TECH
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Problems solved by technology

[0003] Due to the simplicity of the excitation principle and the simplicity of the theoretical analysis method, most of the vibrators of piezoelectric ultrasonic motors are excited by the method of pasting piezoelectric ceramic sheets with metal elastomers. This excitation method uses piezoelectric ceramic d 31 vibration mode, d 31 The vibration mode is the stretching vibration mode of the ceramic sheet along the length direction. Due to the low tensile strength of the material in this vibration mode and the low electromechanical coupling efficiency for energy conversion, and the lim

Method used

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  • Longitudinal and flexural composite transducer type double cylinder-shaped traveling wave ultrasonic motor vibrator
  • Longitudinal and flexural composite transducer type double cylinder-shaped traveling wave ultrasonic motor vibrator
  • Longitudinal and flexural composite transducer type double cylinder-shaped traveling wave ultrasonic motor vibrator

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specific Embodiment approach 1

[0014] Specific implementation mode 1: the following combination Figure 1 ~ Figure 4 To illustrate this embodiment, this embodiment includes a longitudinal-bending composite sandwich transducer 1 and two cylinders 2. The inner wall of the cylinder 2 is evenly distributed along the circumferential direction with a plurality of comb-shaped driving teeth 2-1, and a plurality of comb-shaped The driving tooth 2-1 is parallel to the central axis along the axial direction of the cylinder 2;

[0015] The longitudinal and bending composite sandwich transducer 1 consists of two front end covers 1-1, two first bending vibration piezoelectric ceramic sheets 1-21, two second bending vibration piezoelectric ceramic sheets 1-22, and two first bending vibration piezoelectric ceramic sheets 1-22. One longitudinal vibration piezoelectric ceramic sheet 1-31, two second longitudinal vibration piezoelectric ceramic sheet 1-32, two first electrode sheets 1-41, two second electrode sheets 1-42, two th...

specific Embodiment approach 2

[0021] Embodiment 2: The difference between this embodiment and the first embodiment is that the first bending vibration piezoelectric ceramic sheet 1-21, the second bending vibration piezoelectric ceramic sheet 1-22, the first longitudinal vibration piezoelectric ceramic The cross sections of the sheet 1-31, the second longitudinal vibration piezoelectric ceramic sheet 1-32 and the flange 1-5 are rectangular at the same time. Other components and connection relationships are the same as in the first embodiment.

specific Embodiment approach 3

[0022] Specific embodiment three: This embodiment is different from the first embodiment in that the first bending vibration piezoelectric ceramic sheet 1-21, the second bending vibration piezoelectric ceramic sheet 1-22, the first longitudinal vibration piezoelectric ceramic The cross sections of the sheet 1-31, the second longitudinal vibration piezoelectric ceramic sheet 1-32 and the flange 1-5 are circular at the same time. Other components and connection relationships are the same as in the first embodiment.

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Abstract

A longitudinal and flexural composite transducer type double cylinder-shaped traveling wave ultrasonic motor vibration generator belongs to the technical field of a piezoelectric ultrasonic motor. The invention aims at solving the problems that the mechanical output capacity of an ultrasonic motor is restricted when the method that metal elastic body pastes a piezoelectric ceramic sheet is adopted for excitation by the existing ultrasonic motor vibration generator, vibration path distortion of vibration generator surface particle caused by the condition that multi-transducer can not be guaranteed to be completely consistent when the multi-transducer are adopted to drive simultaneously and the mechanical output capacity and maneuverability of the ultrasonic motor are reduced. The invention comprises a longitudinal and flexural composite sandwich transducer and two cylinders, the small end face of a front end cover of the longitudinal and flexural composite sandwich transducer is made into a whole with a cylinder, the big end face of the front end cover thereof is respectively connected with one end of a screw stud, a longitudinal vibration piezoelectric ceramic plate and a flexural vibration piezoelectric ceramic plate respectively are sheathed on the screw stud with electrode plates in an interval manner, and the other end of the screw stud is connected with a flange. The traveling wave ultrasonic motor vibrator is applicable to the manufacturing field of the ultrasonic motor.

Description

Technical field [0001] The invention relates to a longitudinal and bending composite transducer type double cylindrical traveling wave ultrasonic motor vibrator, belonging to the technical field of piezoelectric ultrasonic motors. Background technique [0002] An ultrasonic motor is a motor that uses ultrasonic vibration energy to generate driving force through frictional coupling. It uses the reverse piezoelectric effect of piezoelectric ceramics to excite vibrations in the ultrasonic frequency range in the elastic body, and then form a particle movement with a specific track at a specific point or a specific area on the surface of the elastic body, and then pass through the stator and rotor. Friction coupling converts the microscopic motion of the particle into the macroscopic motion of the rotor. Ultrasonic motor has the advantages of low speed and large torque, no need for variable speed mechanism, no electromagnetic interference, fast response speed and self-locking after p...

Claims

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Application Information

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IPC IPC(8): H02N2/12
Inventor 陈维山刘英想刘军考石胜君
Owner HARBIN INST OF TECH
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