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Bent type piezoelectric ultrasonic motor

An ultrasonic motor, piezoelectric technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problem of difficulty in ensuring the working stability of piezoelectric ultrasonic motors, etc. To achieve the effect of good excitation effect, improve stability and reduce production cost

Inactive Publication Date: 2014-02-26
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a bending-twisting piezoelectric ultrasonic motor to solve the problem that the working stability of the piezoelectric ultrasonic motor is difficult to guarantee due to the existence of longitudinal oscillators and torsional oscillators

Method used

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Embodiment Construction

[0016] The present invention includes a stator 1 and a rotor 2 . The piezoelectric ceramic sheets 12 are pasted on the four end sides of the stator outer frame, and the shapes and sizes of the piezoelectric ceramic sheets 12 and the end sides of the stator outer frame are the same.

[0017] Such as figure 1 As shown, the present invention consists of a stator 1, a rotor 2, a front support 3, a rear support 4, a piezoelectric ceramic sheet 12, an end cover 7 and a bearing 6. The front support 3 and the rear support 4 are relatively fastened to form a motor housing; core holes with opposite openings are opened on the front support 3 and the rear support 4 respectively, and bearings are respectively installed in the two core holes 6. The two ends of the rotor 2 are supported and connected to the bearings 6 in the two core holes, and the end caps 7 are covered outside the two core holes of the front and rear supports. The stator 1 is also housed in the fastening cavity between t...

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Abstract

The invention relates to a bent type piezoelectric ultrasonic motor. A front support and a back support are mutually buckled to form a motor casing, the front support and the back support are respectively provided with core holes of which hole ports are opposite, the two core holes are respectively equipped with a bearing, two ends of a rotor are in supporting connection on the bearings in the two core holes, a buckle chamber between the front support and the back support is further equipped with a stator, a shape of the stator is four radiation boards which are connected between an outer-square inner-circular outer border and a ring-shaped inner border along a circumference of the inner border uniformly, the four radiation boards have same directions along the circumference and are in tangential relation with the inner border, an inner circular face of the inner border of the stator is sleeved on an outer circular face of the rotor, and piezoelectric ceramic sheets are four and are respectively pasted on four end side faces of the outer border of the stator. According to the bent type piezoelectric ultrasonic motor, frequencies of bending deformation and torsion deformation of the stator are completely consistent, operation stability of the motor is facilitated to improved, and manufacturing cost can further be reduced.

Description

technical field [0001] The invention relates to a piezoelectric ultrasonic motor, in particular to a bending and twisting piezoelectric ultrasonic motor. Background technique [0002] The piezoelectric ultrasonic motor uses the inverse piezoelectric effect of piezoelectric ceramics to excite the ultrasonic vibration of the stator, and uses the vibration deformation of the stator to drive the rotor in contact with it to rotate. Piezoelectric ultrasonic motor has the advantages of rapid response and easy miniaturization, and has a good application prospect in the field of drive control of micro-miniature electromechanical devices. At present, the existing ultrasonic motors are divided into two types: traveling wave type and standing wave type. Patent No. CN02217486.9 discloses a "longitudinal torsion composite ultrasonic motor", which is a standing wave rotating ultrasonic motor with a columnar structure. The motor stator consists of a lower metal ring, a piezoelectric cerami...

Claims

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Application Information

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