Amplified piezo actuator with motorized adjustment screw

A technology of actuators and amplifiers, applied in piezoelectric devices/electrostrictive devices, generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, etc., and can solve problems such as non-existence

Active Publication Date: 2017-08-01
THORLABS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for applications such as steering beams in mirror mounts, the possibility of long-stroke position adjustments on the order of a few millimeters and fine piezo-actuated adjustments at high frequencies on the order of submicron to hundreds of microns within the same device does not exist

Method used

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  • Amplified piezo actuator with motorized adjustment screw
  • Amplified piezo actuator with motorized adjustment screw
  • Amplified piezo actuator with motorized adjustment screw

Examples

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Embodiment Construction

[0012] The description of illustrative embodiments in accordance with the principles of the invention is intended to be read in conjunction with the accompanying drawings, which are to be considered a part of the overall written description. In describing the embodiments of the invention disclosed herein, any references to directions or orientations are for convenience of description only and do not limit the scope of the invention in any way. Words such as "lower", "upper", "horizontal", "vertical", "above", "below", "upper", "lower", "top", "bottom" and derivatives thereof (such as "horizontally" , "downwardly", "upwardly", etc.) should be construed as referring to directions as subsequently described or as shown in the figure in question. These relative terms are for convenience of description only and do not require the device to be constructed or operated in a particular orientation unless expressly so indicated. Terms such as "attached," "attached," "connected," "couple...

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PUM

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Abstract

A piezoelectric actuator with integrated features to provide linear displacement of a threaded rod is presented. One mechanism provides mechanically amplified piezo motion for high speed / short travel position scanning whereas the other provides a low speed / long travel piezo motorized position adjustment. Mechanical amplifier incorporates one or more piezo stacks in longitudinal axis with preload to translate an amplified motion in the order of a few times in the transverse axis, perpendicular to the piezo stack motion. The piezo amplified output travel is transmitted to the internally threaded features of the other mechanism where a screw with a ball at the end to push a desired surface for high speed scanning mode translation. The internally threaded feature of the other mechanism is also operated by a secondary piezo stack which produces slip- stick motion steps to rotate the screw in one direction or the other to produce a slow speed / long travel mode.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Patent Application No. 62 / 050,814, filed September 16, 2014, the contents of which are incorporated herein by reference. This application is also related to US Provisional Application No. 62 / 037,997, filed August 15, 2014, the contents of which are incorporated herein by reference. technical field [0003] The present invention generally relates to piezoelectric actuators. More specifically, the present invention relates to amplified piezoelectric actuators with motorized adjustment screws. Background technique [0004] Piezoelectric stacks provide limited displacement when actuated by a change in applied voltage. Flexibility-based mechanical structures have been developed to amplify movement, typically in the transverse direction of piezoelectric expansion, which typically provides displacements on the order of up to 100 microns, by typically a factor of several....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/10H02N2/12H01L41/09
CPCH02N2/043H02N2/101
Inventor S·法蒂M·罗布森K·蒂斯
Owner THORLABS INC
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