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Sandwich type round plate stator and ultrasonic motor using the same

An ultrasonic motor, sandwich technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve problems such as mechanical output capacity constraints, achieve simplified structure, improve controllable effect

Inactive Publication Date: 2009-03-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the mechanical output capability of the existing ultrasonic motor is restricted due to the excitation of the piezoelectric ceramic sheet pasted by the metal elastic body, the present invention provides a sandwich disc stator and an ultrasonic motor using the stator. motor

Method used

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  • Sandwich type round plate stator and ultrasonic motor using the same
  • Sandwich type round plate stator and ultrasonic motor using the same
  • Sandwich type round plate stator and ultrasonic motor using the same

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specific Embodiment approach 1

[0010] Specific implementation mode one: combine Figure 1 to Figure 5 Describe this embodiment, this embodiment is made up of driving disc 1-1 and even number of driving assemblies 1-8; Said driving disc 1-1 is composed of disc 1-1-1, outer thin-walled ring 1-1-2, The flange 1-1-3, the inner thin-walled ring 1-1-4 and the bearing seat 1-1-5; the outer thin-walled ring 1-1-2 is arranged on the disc 1-1-1 and the flange 1-1- 3; the inner thin-walled ring 1-1-4 is arranged between the disc 1-1-1 and the bearing seat 1-1-5; the central axis of the disc 1-1-1, the outer thin-walled ring 1- The central axis of 1-2, the central axis of flange 1-1-3, the central axis of inner thin-walled ring 1-1-4 and the central axis of bearing seat 1-1-5 are located on the same axis; the drive assembly 1- 8 consists of two cantilever beams 1-8-1, four piezoelectric ceramic sheets 1-8-2, adjusting gaskets 1-8-3, copper electrodes 1-8-4, and pre-tightening screws 1-8-5 , pre-tightening nut 1-8-6 a...

specific Embodiment approach 2

[0012] Embodiment 2: This embodiment differs from Embodiment 1 in that the disk 1-1-1, the outer thin-walled ring 1-1-2, the flange 1-1-3, the inner thin-walled ring 1-1-4, The bearing seat 1-1-5 and the cantilever beam 1-8-1 are processed into an integral piece using a single piece of metal material. Other compositions and connection methods are the same as those in Embodiment 1. Adopting this structure can achieve the purpose of reducing energy loss, and is beneficial to improving the controllability of the particle vibration track on the surface of the driving tooth.

specific Embodiment approach 3

[0013] Embodiment 3: This embodiment differs from Embodiment 1 in that the distance between the two center planes of the two cantilever beams 1-8-1 is half the wavelength of the bending vibration of the disc. Other compositions and connection methods are the same as those in Embodiment 1.

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Abstract

The invention relates to a sandwich disk stator and an ultrasonic motor which uses the stator, which relate to the technical field of piezoelectric ultrasonic motors. The sandwich disk stator and the ultrasonic motor solve the problem in an existing ultrasonic motor that since a mode that a metallic elastomer is pasted with a piezoelectric ceramic slice is adopted to actuate, the mechanical output ability is restricted. Driving elements with even number in the sandwich disk stator are fixed on the upper end surface of a disk, two pairs of piezoelectric ceramic pieces are fixed between each pair of cantilever beams, and a plurality of comb-shaped driving gears are evenly distributed on the lower end surface of the disk. The ultrasonic motor which uses the stator comprises two stators, a rotor component is composed of a rotor and a wear resistance bush ring, wherein the end surface of the wear resistance bush ring is provided with same taper with the upper end surface of the driving gears, two stators are respectively installed on and under the rotor, the pre-tightening between the stator component and the rotor component can be realized through two stator flanges, and the rotor component is connected with bearing blocks of the two stators through output shafts and bearings on two ends of the rotor in a rotary mode. The sandwich disk stator and the ultrasonic motor have simple structure, can realize big force moment output, and have stable performance.

Description

technical field [0001] The invention relates to a sandwich type disc stator and an ultrasonic motor using the stator, belonging to the technical field of piezoelectric ultrasonic motors. Background technique [0002] Piezoelectric ultrasonic motor is a kind of piezoelectric ultrasonic motor that uses the inverse piezoelectric effect of piezoelectric ceramics to excite vibration in the ultrasonic frequency range in the elastic body, and forms a particle motion with a specific trajectory at a specific point or area on the surface of the elastic body, and then passes through the stator, The frictional coupling between the rotors converts the microscopic motion of the particle into the macroscopic motion of the rotor. It has the advantages of low speed and high torque, no need for a transmission mechanism, no electromagnetic interference, fast response, and self-locking when power is off. As a piezoelectric driver, it has Very wide range of applications. Due to the simplicity o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/12H02N2/10
Inventor 陈维山刘英想刘军考谢涛石胜君
Owner HARBIN INST OF TECH
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