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Rotary type ultraphonic motor

An ultrasonic motor, rotary technology, applied in the direction of generators/motors, electrical components, piezoelectric effect/electrostrictive or magnetostrictive motors, etc. It is difficult to realize the problems of high torque and low working reliability, so as to achieve the effect of simple structure, consistent performance and reliable work.

Inactive Publication Date: 2007-02-07
SOUTH CHINA AGRI UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing rotary ultrasonic motors, the out-of-plane bending vibration mode is mainly combined into end-face traveling waves, and the rotor is driven to rotate. The common problems are small driving torque, large axial volume, and wear difference between the inner and outer diameter contact areas of the stator and rotor. In addition, even if the in-plane vibration mode is adopted, in order to apply the in-plane radial preload, the disc or ring of the vibrator or rotor is made into two semi-discs or semi-circles, and the middle passes through Springs are connected into disks or rings to apply in-plane radial preload. At present, it is difficult to achieve high torque and low reliability

Method used

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  • Rotary type ultraphonic motor
  • Rotary type ultraphonic motor
  • Rotary type ultraphonic motor

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Structural schematic diagram of the present invention is attached image 3 , attached Figure 4 As shown, it includes an upper disc-shaped piezoelectric ceramic sheet 3, a lower disc-shaped piezoelectric ceramic sheet 7, an upper thin round metal elastic body 4, a lower thin round metal elastic body 6, a ring-shaped rotor 5, and a fastening nut 1 , disc spring 2, fastening bolt 8, the disc-shaped piezoelectric ceramic sheets 3, 7 are respectively pasted with the thin circular frustum-shaped metal elastic body 4, 6 through epoxy resin to form two composite vibrators of the thin circular frustum body, The inner ring surface of the ring-shaped rotor 5 is coaxial, and the upper bottom surface is adjacent to two identical truncated cones, which are matched with the circular truncated surfaces of the thin truncated metal elastomers 4 and 6, and the pre-tightening for...

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Abstract

The invention relates to a rotation ultra-sonic motor, which comprises: vibrator and rotor, wherein said vibrator is formed by adhered piezoelectric ceramic and metal elastic element; said rotor is annular and sheathes the vibrator; the tension force between vibrator and rotor via adjustable tension device can be adjusted; the contact part between the metal elastic element and the rotor is round; the inner annular surface of rotor at least has one area to match the contact part of metal elastic element. In said invention, the rounds of vibrator and the rotor are contacted, to transform the traveling vibration of metal elastic element into the vibration of vibrator; and it has small axial volume, to obtain higher torque and self-lock force, with simple structure and reliable operation.

Description

technical field [0001] The invention relates to the technical field of ultrasonic motors, in particular to a rotary ultrasonic motor. technical background [0002] The ultrasonic motor is a new type of motor. It uses the inverse piezoelectric effect of piezoelectric materials to make the surface particles of the stator vibrate on the order of microns in a certain trajectory, and then converts the vibration kinetic energy into the rotational kinetic energy of the rotor through friction coupling. Compared with electromagnetic motors, ultrasonic motors have some obvious advantages, such as low speed and high torque, direct drive without deceleration mechanism, no gear gap, high positioning accuracy, high efficiency at high torque density, self-holding torque, and small inertia , fast response, no noise in operation, no magnetic interference and strong anti-magnetic interference ability, simple structure, easy processing, easy miniaturization, etc. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/00H02N2/10H02N2/12
Inventor 张铁民
Owner SOUTH CHINA AGRI UNIV
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