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Micro-displacement actuator based on piezoelectric stack

A micro-displacement driver, piezoelectric stack technology, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problem of inflexible assembly of drivers and driven parts, No dust-proof sealing device is provided, and the dust in the packaging device is not easy to remove, so as to achieve the effect of strong reusability, simple overall structure, and damage prevention.

Active Publication Date: 2016-08-24
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the assembly of the driver and the driven part is inflexible, and the dust in the packaging device is not easy to remove or there is no dust-proof sealing device. In order to solve the above problems, a micro-displacement driver based on piezoelectric stack is provided

Method used

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  • Micro-displacement actuator based on piezoelectric stack
  • Micro-displacement actuator based on piezoelectric stack
  • Micro-displacement actuator based on piezoelectric stack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First, pass the displacement transmission rod 1 through the axial through hole on the end cover 2, so that the large-diameter end surface of the displacement transmission rod 1 and the upper surface of the end cover 2 are tightly attached to each other, and the spring 4 is set on the displacement transmission rod 1, and the displacement transmission A lock nut 5 is installed on the small-diameter external thread of the rod 1, and the lock nut 5 is screwed in to a certain degree, so that the spring 4 placed between the end cover 2 and the lock nut 5 is in a compressed state, and the spring 4 bears The pressure is roughly the required pretightening force on the piezoelectric stack driver 6; after that, the piezoelectric stack driver 6 is installed inside the sleeve 7, so that the lower end of the cylindrical (or square column) piezoelectric stack driver 6 is placed in the circular groove (or square groove), and lead the power line on the piezoelectric stack driver 6 from t...

Embodiment 2

[0024] Different from Embodiment 1, in this embodiment, there is no need to use the pre-tightening nut 9, and the lower end of the used sleeve 7 does not have a pre-tightening threaded hole; The cover 2 is connected with the internal thread on the upper part of the sleeve 7 through the external thread on the end cover 2, and the end cover 2 is rotated to make the lower end surface of the displacement transmission rod 1 contact the upper end surface of the piezoelectric stack driver 6, and continue to rotate The end cover 2 makes the large-diameter end surface of the displacement transmission rod 1 separate from the upper surface of the end cover 2, and the relative displacement of the two is less than 20um, preventing dust from entering the sleeve 7 through the end cover 2.

[0025] When applying the micro-displacement driver based on the piezoelectric stack, through the four threaded holes 11 on the lower end surface of the sleeve 7 or the four fastening through holes 10 on th...

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Abstract

The invention relates to a micro-displacement driver based on a piezoelectric stack, and belongs to the technical field of precision machinery and micro-nano level precision positioning. Micro-displacement drivers based on piezoelectric stacks include piezoelectric stack drivers, which also include displacement transmission rods, which pass through the axial through holes of the end caps. The displacement transmission rods are in the shape of stepped cylinders. The steps of the displacement transmission rods The surface is in contact with the upper surface of the end cover, the spring sleeve is placed on the displacement transmission rod and placed between the end cover and the lock nut and is in a compressed state, the end cover is movably connected with the sleeve, and the lower end surface of the piezoelectric stack driver is placed In the groove at the inner bottom of the sleeve, the upper end surface of the piezoelectric stack driver is in contact with the lower end surface of the displacement transmission rod, and the power line of the piezoelectric stack driver is drawn out from the lead hole. The overall structure of the micro-displacement driver is simple and reusable, and it is suitable for high-precision nano-drive, high-frequency resonance drive and high-precision positioning systems.

Description

technical field [0001] The invention relates to a piezoelectric stack-based micro-displacement driver, which belongs to the technical field of precision machinery and micro-nano level precision positioning. Background technique [0002] Piezoelectric stack drivers are used in precision instruments or equipment to realize nanoscale displacement driving, force driving, resonance driving, etc. When applying a piezoelectric stack driver, in order to avoid damage to the piezoelectric stack driver by dynamic loads during use, it is necessary to apply a preload to the piezoelectric stack driver and ensure that the piezoelectric stack driver can drive its displacement output In addition, in order to facilitate installation, it is generally required that the piezoelectric stack driver can be fixed on the base, and its output displacement end can be connected and fixed with the driven part. [0003] At present, the common piezoelectric stack drivers are unpackaged, that is, bare piez...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/04
Inventor 张段芹罗国富吴学红杨发亮韩丽张志城张德海李成佳
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY