A Three-Stage Amplification Mechanism for a Compact Piezoelectric Actuator
Journal
Actuators
Journal Volume
14
Journal Issue
12
Start Page
612
ISSN
20760825
Date Issued
2025-12
Author(s)
Abstract
Mechanical amplifiers can enhance the travel range of piezoelectric actuators, thereby expanding the applications of these actuators. Various amplification mechanisms have been proposed for piezoelectric actuators with different design requirements. For instance, rhombus- and bridge-type amplification mechanisms are compact and can therefore be applied in many applications with size restrictions. However, the amplification ratio of a single-stage rhombus- or bridge-type mechanism is limited. In this study, a novel three-stage amplifier was developed to achieve a high amplification ratio while keeping the device compact. A piezoelectric actuator integrated with this amplifier had a travel range of 207.5 μm, an amplification ratio of 13.7, and dimensions of 33.5 mm × 34.2 mm × 10 mm. Moreover, this actuator was used to construct a compact jetting dispenser with dimensions of 69 mm × 72 mm × 20 mm. Experimental results suggested that this dispenser can generate uniform and stable droplets, confirming the practical utility of the developed piezoelectric actuator.
Subjects
amplification mechanism
long travel range
piezoelectric actuator
Publisher
Multidisciplinary Digital Publishing Institute (MDPI)
Type
journal article