Piezoelectric type torsion driver

A driver, piezoelectric technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problems of complex structure, large magnetic leakage, poor versatility, etc. Achieve the effects of simple mechanical structure, low noise and low power consumption

Inactive Publication Date: 2009-06-10
TSINGHUA UNIV
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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 piezoelectric torsion driver, which uses the inverse piezoelectric effect of piezoelectric materials to generate torsional motion, so as to overcome the shortcomings of the existing electromagnetic driver with complex structure and large magnetic leakage, and at the same time overcome the existing piezoelectric torsion. Disadvantages of poor versatility of torsional drives

Method used

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  • Piezoelectric type torsion driver
  • Piezoelectric type torsion driver

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Embodiment Construction

[0018] The principle, structure and working process of the present invention will be further described below with reference to the accompanying drawings.

[0019] figure 1 is the top view (half section) of the piezoelectric torsional actuator, figure 2 is the cross-sectional view of the piezoelectric torsional actuator along the direction A-A', image 3 It is a cross-sectional view of the piezoelectric torsion driver along the B-B' direction. The driver consists of a base 1, a piezoelectric material adhesive sheet 2, a set screw 3, a motion conversion disc 4, an output shaft 5, a housing 6, a bearing 7 and Composed of fixing screws 8; the bonding method of the piezoelectric material bonding sheet 2 is as follows Figure 4 As shown, the direction of the arrow is the polarization direction of the piezoelectric material, and the part in the middle of the two piezoelectric material sheets is the metal foil lead-out electrode 16; Figure 5 is the front view of the motion conver...

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Abstract

The invention relates to a driver for generating twisting motion in the mechanical engineering, in particular to a piezoelectric type twisting driver. The driver comprises a base, two piezoelectric material bonding sheets, a holding screw, a motion converting disk, an output shaft and a housing, wherein a through groove is formed at the center of the base, one end of each of the two piezoelectric material bonding sheets is fixed, the other ends of the two piezoelectric material bonding sheets transfer motion to the motion converting disk by using the holding screw which is connected with the motion converting disk through threaded connection or interference connection, no clearance is reserved between the piezoelectric material bonding sheets and the holding screw, the top of the motion converting disk is connected with the output shaft, and the housing fixes the output shaft by a bearing. The piezoelectric type twisting driver has the advantages of simple mechanical structure, small volume, low power consumption, high energy density, small magnetic leakage, high anti-electromagnetic interference ability, simple control circuit, low use cost, high response speed, small noise and strong commonality, and the like.

Description

technical field [0001] The invention relates to a driver for torsion motion in mechanical engineering, in particular to a piezoelectric torsion driver. Background technique [0002] A torsional drive is a drive capable of generating and outputting torsional motion. The traditional torsional drive mostly adopts electromagnetic structure, which has the advantages of large output torque and good speed regulation performance, and has been widely used in the drive field. However, due to the complex structure, the electromagnetic torsional actuator has a large size and is difficult to miniaturize, and its application is limited due to the existence of magnetic leakage. Therefore, the manufacture of torsional actuators using new principles and new methods has become a research hotspot in recent years. [0003] Existing piezoelectric torsional actuators, such as the piezoelectric intelligent torsional vibration control rod disclosed in Chinese patent CN1434227A, use piezoelectric ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/10H02N2/12
Inventor 高志刘向锋刘莹刘大伟丘天
Owner TSINGHUA UNIV
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