Universal hollow-structure great-moment ring piezoelectric ultrasonic motor

A technology of ultrasonic motor and high torque, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motor, generator/motor, electrical components, etc., can solve the problems of lack of versatility and high torque

Inactive Publication Date: 2003-01-08
TSINGHUA UNIV
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  • Abstract
  • Description
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  • Universal hollow-structure great-moment ring piezoelectric ultrasonic motor
  • Universal hollow-structure great-moment ring piezoelectric ultrasonic motor
  • Universal hollow-structure great-moment ring piezoelectric ultrasonic motor

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Embodiment Construction

[0013] please see Figure 3 ~ Figure 5 .

[0014] image 3 Is the general structure of this embodiment. It consists of a rotor part 30 , a stator part 31 , a base part 32 and a shaft part 33 . Wherein, the stator part 31 is composed of a metal ring 313 with comb-shaped driving teeth 310 and an annular piezoelectric ceramic sheet 314, and the annular piezoelectric ceramic sheet 314 is bonded to the bottom of the metal ring 313 by epoxy resin glue; the base part 32 has a base 321 with a fixed screw hole 3210, and its inner wall has a standard ball bearing 320 for positioning the central shaft 33; the rotor 30 is made up of a disc spring 300, a rubber sheet 301 and a metal ring sheet 302, and the rubber sheet 301 and the metal ring piece 302 are bonded with epoxy resin, and under the action of the disc spring 300, the metal ring piece 302 closely cooperates with the stator driving teeth 310, so that the rotor part 30 and the stator part 31 are in close contact; the shaft 33 in...

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Abstract

The general annular piezoelectricity ultrasonic motor of large moment with hollow structure features in that the stator comprises the metal ring with driving teeth and the annular piezoelectric ceramic pieces. The rotator comprises metal pieces matching the driving teeth, the spring and rubber gasket. The base comprises the ball bearing for positioning the hollow central shaft. The piezoelectric ceramic pieces are polarized along the thickness with inversion once per 1/2 wavelength. The difference of 1/4 or 3/4 wavelength is existed between the two groups of the polarized sections, which are connected to the two AC signals. The invented motor possesses the versatility, provides the maximum output torque larger than 5K gfcm, and rotate speed less than 120r/min.

Description

technical field [0001] The utility model relates to a general-purpose hollow-structure large-torque annular piezoelectric ultrasonic motor, which belongs to the technical field of piezoelectric ultrasonic motors. Background technique [0002] Piezoelectric ultrasonic motors are widely used as driving components of precision instruments due to their fast response speed, self-locking when power is off, no electromagnetic disturbance, and low-speed operation. There are two main types of ring piezoelectric motors in foreign countries: one is called ring piezoelectric motor because of the piezoelectric ceramic sheet with ring structure, but it does not have the characteristics of hollow structure. figure 1 It is the structure of the annular piezoelectric ultrasonic motor developed by Japan Sashida, Matsushita and Canon, which mainly includes a rotor 11, a friction material 12, a stator 13 and a piezoelectric ceramic ring piece 14. The fixing methods of the stators all adopt a la...

Claims

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Application Information

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IPC IPC(8): H02N2/10H02N2/12
Inventor 褚祥诚袁松梅严仁博李龙土桂治轮
Owner TSINGHUA UNIV
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