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Minisize linear driver based on dimorphic crystal piezoelectric film

A linear actuator, piezoelectric film technology, applied in micro manipulators, fluids using vibration, manipulators, etc., can solve problems such as inability to work, reduced output speed, and difficulty in miniaturization, achieving low cost, increased speed, and improved drive. effect of speed

Inactive Publication Date: 2005-11-23
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

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Embodiment Construction

[0029] A preferred embodiment of the present invention is described as follows in conjunction with accompanying drawing:

[0030] see figure 1 , the miniature linear actuator based on the double crystal piezoelectric film consists of the following parts: central shaft 1, fixed sleeve 2, double crystal piezoelectric film 3, end rigid frame 4, middle rigid frame 5, insulating isolation sleeve 6, elastic support feet 7. Inertial mass block 8.

[0031] The inertial mass 3 is set on one end of the central axis 1, several bicrystalline piezoelectric films 3 are set on the middle of the central axis, and the sheets are separated by an insulating spacer 6, and the fixed sleeve 2 is separated from the other end of the central axis 1. One end is inserted, and the spacer sleeve 6 is pressed tightly, so that each bicrystalline piezoelectric film 3 is tightened along the axis direction of the central axis 1, and then the fixed sleeve 2 is welded to the central axis 1. The middle rigid fr...

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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 the voltage-driven driver utilizing the piezoelectric effect, and also belongs to the technical field of miniature mobile machinery capable of automatically walking in micropipes. Background technique [0002] In buildings and industrial and mining enterprises, there are a large number of piping facilities such as water pipes, air pipes and oil pipes. Among them, thin tubes with an inner diameter of 10 mm or less are widely used. These pipelines have been used for many years, and the inside of the pipeline will be corroded, blocked, and even cracked, causing great hidden dangers to normal use, and sometimes causing accidents. In order to maintain safety or sanitation, regular internal inspection and cleaning must be carried out. However, the current running mechanism (or driver, robot, etc.) in the pipeline is either too large in radial dimension to enter the thin pipeline; or the output speed and propulsion force are too sma...

Claims

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Application Information

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