A micropump sucker employs a gas film micropump to produce a negative pressure adhesion in a suction cup. In this study, a piezo-driven flexible actuator was developed based on a bridge-type mechanism as a vibrator for such a micropump film. The model of the flexible actuator under an external load is built based on an elastic model, and the displacement, driving force, and work efficiency are formulated in terms of the external loads, materials, and geometric parameters. The finite element method was used to verify this analytical model. An increase in the compliance of flexure hinges was found to improve the performances of the flexible actuator. The Young’s modulus of materials decides force performances and the effects of external loads. Based on the elastic analysis, the proposed flexible mechanism, made of silicon, was optimized to realize optimal output displacement in a compact size and employed in the prototype of a micropump sucker with a weight of 1.3 g that produced a maximum negative pressure of 2.45 kPa. It can hold on a weight of 1.4 g. When the inlet of the proposed sucker is open, it has the maximum flow rate of 4 ml/min.
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August 2019
Research-Article
A Micropump Sucker Using a Piezo-Driven Flexible Mechanism
Jihao Liu,
Jihao Liu
Robotics Institute,
Shanghai 200240,
e-mail: yihongyishui@sjtu.edu.cn
Shanghai Jiao Tong University
,Shanghai 200240,
China
e-mail: yihongyishui@sjtu.edu.cn
Search for other works by this author on:
Weixin Yan,
Weixin Yan
Robotics Institute,
Shanghai 200240,
e-mail: xiaogu4524@sjtu.edu.cn
Shanghai Jiao Tong University
,Shanghai 200240,
China
e-mail: xiaogu4524@sjtu.edu.cn
Search for other works by this author on:
Yanzheng Zhao
Yanzheng Zhao
Search for other works by this author on:
Jihao Liu
Robotics Institute,
Shanghai 200240,
e-mail: yihongyishui@sjtu.edu.cn
Shanghai Jiao Tong University
,Shanghai 200240,
China
e-mail: yihongyishui@sjtu.edu.cn
Weixin Yan
Robotics Institute,
Shanghai 200240,
e-mail: xiaogu4524@sjtu.edu.cn
Shanghai Jiao Tong University
,Shanghai 200240,
China
e-mail: xiaogu4524@sjtu.edu.cn
Yanzheng Zhao
Contributed by the Mechanisms and Robotics Committee of ASME for publication in the Journal of Mechanisms and Robotics. Manuscript received June 20, 2018; final manuscript received April 13, 2019; published online May 17, 2019. Assoc. Editor: Xilun Ding.
J. Mechanisms Robotics. Aug 2019, 11(4): 041009 (14 pages)
Published Online: May 17, 2019
Article history
Received:
June 20, 2018
Revision Received:
April 13, 2019
Accepted:
April 16, 2019
Citation
Liu, J., Yan, W., and Zhao, Y. (May 17, 2019). "A Micropump Sucker Using a Piezo-Driven Flexible Mechanism." ASME. J. Mechanisms Robotics. August 2019; 11(4): 041009. https://doi.org/10.1115/1.4043600
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