Piezoelectric-drive eight-strand coaxial micro displacement amplification mechanism

Abstract

The invention discloses a piezoelectric-drive eight-strand coaxial micro displacement amplification mechanism which comprises a support rod, a support base, a double-hinge fixing cover, a piezoelectric rod, a piezoelectric rod connecting rack, a support lateral seat connecting rod, a support lateral seat, a flexible hinge and a unilateral hinge mounting cover. The piezoelectric-drive eight-strand coaxial micro displacement amplification mechanism mainly has the advantages that flexible hinges are used, and the whole mechanism is free of friction and needs no lubrication; the mechanism uses piezoelectric ceramic as an actuator, the motion precision of the mechanism can be submicron dimension, the motion range of the mechanism can reach dozens of micrometers, and large push force can be provided; an eight-strand coaxial mechanism can eliminate the shearing force which the piezoelectric ceramic cannot bear; micro displacement amplification proportion can be adjusted by changing the position relations among hinge axes.

Description

Technical field: [0001] A piezo-electrically driven eight-twisted coaxial micro-displacement amplifying mechanism, which is applied to the field of micro-actuation in space precision optical-mechanical systems, can provide high-precision, high-thrust micro-displacement. Background technique: [0002] In recent years, with the rapid development of microelectronics technology, aerospace, bioengineering and other disciplines, we have officially entered the "submicron-nano" era. In many technical fields such as electronics, optics, and mechanical manufacturing, there is an urgent need for high-precision, high-resolution, and high-reliability micro-displacement mechanisms to work directly or cooperate with other instruments to complete high-precision research and use. In astronomical observation, the aperture of the primary mirror of the telescope plays a vital role in the quality of the target image. From the Galileo and Kepler telescopes to the present, the aperture of the pri...

AI Technical Summary

Problems solved by technology

[0011] Patent No. CN03132498.3 discloses a micro-displacement amplification mechanism that uses piezoelectric ceramic drive, and its support plate can be regarded as a flexible element. In this patent, when the center of gravity of the load is eccentric, it is easy to cause shear to the piezoelectric rod. cut damage

Moreover, the flexibility and rigidity of the support plate cannot be combined, which will inevitably reduce the frequency response of the system

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