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Piezoelectric cantilever type ultrasonic motor

An ultrasonic motor, cantilever beam technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problems of difficult miniaturization and complex piezoelectric vibrator structure.

Inactive Publication Date: 2014-01-15
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a piezoelectric cantilever beam type ultrasonic motor to solve the problem that the structure of the piezoelectric vibrator of the existing ultrasonic motor is complicated, it is difficult to miniaturize, and it is not conducive to the application in the field with relatively strict space size requirements (such as micro-drive technology)

Method used

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  • Piezoelectric cantilever type ultrasonic motor
  • Piezoelectric cantilever type ultrasonic motor
  • Piezoelectric cantilever type ultrasonic motor

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Experimental program
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Embodiment Construction

[0013] Such as figure 1 , 2 As shown, the ultrasonic motor consists of a cantilever beam piezoelectric stator (1), a conical rotor (2), an output shaft (3), a spring (4), an adjusting nut (5), a radial bearing (6) and a thrust bearing (7 )composition. The cantilever piezoelectric stator (1) is composed of four piezoelectric bimorph cantilever vibrators (101, 102, 103, 104) and a central mass (105) with exactly the same structure, and each piezoelectric bimorph cantilever vibrator Two pieces of piezoelectric ceramics with opposite polarization directions are bonded to the upper and lower surfaces of the metal substrate through an adhesive to form a sandwich structure. One end of the four piezoelectric bimorph cantilever vibrators is fixed to the base (8), and the other ends are respectively fixed to the four sides of the central mass (105). A right-angled convex tooth (106, 107) is respectively processed on two opposite corners of the upper surface of the central mass block ...

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Abstract

The invention relates to a piezoelectric cantilever type ultrasonic motor, and belongs to the technical field of ultrasonic motor manufacturing. The piezoelectric cantilever type ultrasonic motor comprises a cantilever piezoelectric stator, taper rotors, an output shaft, springs, adjusting nuts, radial bearings, thrust bearings and a base. The cantilever piezoelectric stator is composed of four piezoelectric bimorph cantilever oscillators of the same structure and a center mass block. The four piezoelectric bimorph cantilever oscillators are evenly distributed on the four side faces of the center mass block. The two opposite corners of the upper surface of the center mass block are respectively provided with a right-angle taper convex tooth. The taper rotors are installed on the output shaft through screws and are pressed on the inner top faces of the right-angle taper convex teeth through the action of the output shaft, the springs, the adjusting nuts and the thrust bearings, and pretightening force between the taper rotors and the cantilever piezoelectric stator can be adjusted according to the adjusting nuts and the springs. The motor has the advantages of being simple in structure and high in response speed, only needing one drive signal source and the like.

Description

technical field [0001] The invention relates to a piezoelectric cantilever beam type ultrasonic motor, which can realize precise driving and positioning functions, and belongs to the technical field of ultrasonic motor manufacturing. technical background [0002] The ultrasonic motor uses the inverse piezoelectric effect of piezoelectric ceramics to convert electrical energy into the vibration of the motor stator, and then drives the motor rotor to rotate (or linearly) through the frictional coupling between the motor stator and rotor. Ultrasonic motors have the advantages of compact structure, low speed and high torque, fast response, good control characteristics, no electromagnetic interference, high positioning accuracy, low noise, and can directly drive loads. They are widely used in national defense, military, industry, medical treatment and national production. various fields of life. [0003] There are many patent applications at home and abroad related to piezoelect...

Claims

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Application Information

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IPC IPC(8): H02N2/10H02N2/12
Inventor 王光庆展永政
Owner ZHEJIANG GONGSHANG UNIVERSITY