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Piezoelectric linear driver

A linear drive and drive technology, applied in the direction of generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc., can solve the problems affecting the drive's motion accuracy and motion stability, drive output force and The output stiffness is small, reducing the overall stiffness of the driver, etc., to achieve high motion accuracy and motion stability, simple pre-tightening force adjustment mechanism, and the effect of improving stiffness

Inactive Publication Date: 2014-07-02
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, because the contact between the clamping surface of the driver and the guide rail is a small gap contact (generally only a few microns), the performance of the driver is easily affected by external factors such as aging, temperature, wear, processing and assembly errors, etc.
[0006] Therefore, the inventor found that the existing inchworm-type piezoelectric linear actuator has defects: the existing piezoelectric linear actuator has a complex driving structure and is assembled from multiple components, and the resulting assembly error directly affects the motion accuracy and motion stability of the actuator. At the same time, because the clamping method chooses a simple surface-to-surface contact method, the clamping force is insufficient, and the output force and output stiffness of the driver are also small, and because the contact of each component does not maintain normal surface-to-surface contact, thus Reduced overall stiffness of the drive

Method used

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Embodiment Construction

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0045] A piezoelectric linear actuator provided by the present invention has the characteristics of nanometer-level precision, long stroke, and large output force. The inchworm-type piezoelectric linear actuator with this novel structure can have large stroke, large It has the characteristics of output force and large output stiffness, and can effectively resist the performance degradation of the drive caused by wear and tear during long-term operation of the drive....

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Abstract

The invention discloses a piezoelectric linear driver, which comprises a base and guide rail integrated mechanism and a driver clamping and stretching integrated structure. The base and guide rail integrated structure consists of a base and a guide rail which are integrally combined, the driver clamping and stretching integrated structure consists of an eight-rod flexible mechanism and is mounted on the base and guide rail integrated structure, a gap between a clamping block of the driver clamping and stretching integrated structure and a guide rail of the base and guide rail integrated mechanism can be adjusted by a fastening device, and the clamping block and the guide rail are pretensioned by the fastening device. The piezoelectric linear driver is simple in structure, assembling errors during assembling of too many parts can be avoided, and integral rigidity of the driver can be improved.

Description

technical field [0001] The invention belongs to the field of electromechanical technology, and in particular relates to a piezoelectric linear driver. Background technique [0002] Currently, nanotechnology is developing rapidly. The linear drive with nanometer precision is the power part of nanotechnology, known as the heart of nanotechnology. At present, many famous research institutions both at home and abroad regard the micro-drive system as the main research direction. At the same time, due to the requirements of short, small, light, thin, low noise, high precision, and no electromagnetic interference required in the field of nanotechnology, traditional drivers in the prior art can no longer meet the requirements, so many new functional materials are used to prepare Ultra-precision drivers, and among them, piezoelectric drivers are the best choice due to their many advantages. [0003] The piezoelectric actuator uses the inverse piezoelectric effect of the piezoelect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/02
Inventor 胡泓李全松
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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