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Double-ring piezoelectric ultrasonic motor

An ultrasonic motor, double-ring type technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the complex polarization partition of piezoelectric ceramic sheets, vibration mode It is not easy to stimulate and other problems, to achieve the effect of cost reduction, motor efficiency improvement, and simple production process

Inactive Publication Date: 2014-02-19
HEBEI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a double-ring piezoelectric ultrasonic motor to solve the problems that the in-plane vibration mode of the stator is not easy to excite and the polarization partition of the piezoelectric ceramic sheet is complicated in the existing piezoelectric ultrasonic motor.

Method used

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Embodiment Construction

[0017] Such as figure 1 As shown, the stator 1 is housed in the cylindrical stator support 11, and the outer circular surface of the stator 1 is connected with the inner circular surface of the stator support 11 by threads, and the thread is a fine thread to ensure the installation and precise location. The ports on both sides of the stator support 11 are respectively sealed and fixed with dome-type bearing supports 3, which can seal the ports and prevent the left and right movement of the stator 1. Bearings 5 ​​are respectively installed in the core holes of the two bearing supports 3 , the rotor 2 is a stepped shaft passing through the inner ring of the stator 1 , and the two ends of the rotor 2 are supported and connected to the two bearings 5 ​​. The right end of rotor 2 stretches out to output power. End covers 6 are respectively sealed to the outer ends of the two bearings 5 ​​. On the two end surfaces of the stator 1, annular piezoelectric ceramic sheets 4 are pasted...

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Abstract

The invention relates to a double-ring piezoelectric ultrasonic motor. According to the structure of the double-ring piezoelectric ultrasonic motor, a stator is installed in a cylindrical stator support, bearing supports are connected with end ports of two sides of the stator support respectively in a buckled mode, bearings are installed in core holes of the two bearing supports respectively, and the two ends of a rotor are connected with the two bearings in a supporting mode. According to the stator, the stator comprises an outer circular ring, an inner circular ring and three radial plates, three radial plates circumferentially and evenly distributed are connected between the outer circular ring and the inner circular ring which are concentric, the rotor is connected in the inner circular ring of the stator in a penetrating mode, and a rectangular tooth used for shifting the rotor is arranged on the inner circular surface of the inner circular ring of the stator. Two end surfaces of the stator are respectively bonded with an annular piezoelectric ceramic piece, and the piezoelectric ceramic pieces are attached to the outer circular ring of the stator. Through the radial stretchable deformation of the outer circular ring of the stator, the in-plane vibration mode of the stator of the motor is easily stimulated, polarization of the piezoelectric ceramic pieces does not need to be partitioned, the double-ring piezoelectric ultrasonic motor can work through a whole polarization method, manufacturing cost is lowered, and the efficiency of the motor is improved.

Description

technical field [0001] The invention relates to a piezoelectric ultrasonic motor, in particular to a double-ring piezoelectric ultrasonic motor. Background technique [0002] The piezoelectric ultrasonic motor is a new type of motor that is different from the traditional electromagnetic motor. This kind of motor uses the inverse piezoelectric effect of piezoelectric ceramics to excite the ultrasonic vibration of the stator through high-frequency voltage, and uses the vibration displacement of the stator to drive the rotor in contact with it. Piezoelectric ultrasonic motors have the advantages of being immune to magnetic interference and having a variety of structural forms, and have good application prospects in medical testing instruments, micro-robots and other fields. At present, the existing piezoelectric ultrasonic motors are divided into two types: traveling wave type and standing wave type. The traveling wave motor excites two same-order bending modes through two-ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/12
Inventor 郭辉郝紫阳张军伟
Owner HEBEI UNIVERSITY
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