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Minisize linear driver based on dimorphic crystal piezoelectric film

A technology of linear actuators and piezoelectric films, applied in the direction of micro-manipulators, fluids that use vibration, and manipulators, can solve problems such as inoperability, reduced output speed, and difficulty in miniaturization, and achieve low cost, increased speed, and improved drive. speed effect

Inactive Publication Date: 2007-10-24
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The problem with this invention is that a conductive sleeve is sandwiched between the twin piezoelectric films, which is placed on the central axis and kept in contact (pressed) with the electrodes of the piezoelectric sheets, so as to conduct each piezoelectric sheet and form a Electric circuit, this structure limits the warping deformation of the bimorph piezoelectric film to a certain extent, so that the output speed is reduced, and it cannot even work when the diameter of the bimorph piezoelectric film is small
The disadvantage is that this structure is difficult to miniaturize in the process

Method used

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  • Minisize linear driver based on dimorphic crystal piezoelectric film
  • Minisize linear driver based on dimorphic crystal piezoelectric film
  • Minisize linear driver based on dimorphic crystal piezoelectric film

Examples

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Embodiment Construction

[0029] A preferred embodiment of the present invention is described as follows with reference to the drawings:

[0030] Referring to Figure 1, the miniature linear actuator based on dual-crystal piezoelectric film has the following components: central shaft 1, fixed sleeve 2, dual-crystal piezoelectric film 3, end rigid frame 4, middle rigid frame 5, insulating sleeve 6, Elastic support foot 7, inertial mass 8.

[0031] The inertial mass 3 is sleeved on one end of the central shaft 1, several bimorph piezoelectric films 3 are sleeved in the middle of the central shaft, and the plates are separated by an insulating isolating sleeve 6, and the fixed sleeve 2 is separated from the other side of the central shaft 1. One end is sleeved, and the isolating sleeve 6 is pressed tightly, so that the bimorph piezoelectric films 3 are fastened along the axial direction of the central shaft 1, and then the fixed sleeve 2 is welded to the central shaft 1 to close. The middle rigid frame 5 separ...

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Abstract

This invention relates to a mini linear driver based on the bimorph conductive film, which comprises a driving mechanism and a moving supporting mechanism, wherein the driving mechanism covers on the central bearing and is oriented by the inertia mass block and hub in two ends, the moving supporting mechanism comprises the rigid frame of bimorph conductive film and the resilient supporting pin connecting the frame; said bimorph conductive film comprises ceramics chip of metal foil, characterized in that the rigid frame is round, quadrangle or regular polygon, on the edge there is 3~4 circular small punch holes distributed evenly; said resilient supporting pin is elastic wire through the rigid frame and small punch holes to connect them. Said invention is fit for mini robot driver in the ultra-fine pipe whose bore diameter is below 10mm.

Description

Technical field [0001] The invention belongs to a voltage-driven driver that utilizes the piezoelectric effect, and also belongs to the technical field of micro-mobile machinery that can automatically travel in a micro-pipe. Background technique [0002] There are a large number of piping facilities such as water pipes, gas pipes and oil pipes in buildings and industrial and mining enterprises. Among them, thin tubes with a wall inner diameter of 10mm and below are mostly used. After many years of use, these pipelines will corrode, block, and even cracks, causing great hidden dangers to normal use and sometimes causing accidents. In order to maintain safety or hygiene, it is necessary to conduct regular inspections and cleanings in the pipeline. However, the current running mechanism in the pipeline (or called driver, robot, etc.) is either too large in radial size to enter the thin pipeline; or the output speed and propulsion force are too small to meet the pipeline maintenance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B25J7/00B06B1/06
Inventor 孙麟治龚振邦李朝东章亚男
Owner SHANGHAI UNIV
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