Piezoelectric linear driver

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...

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

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