邱丽芳,印思琪,谢仲添,杨德斌.基于串联式Triple—LET的LEMs滑块机构分析[J].农业机械学报,2016,47(6):381-386.
Qiu Lifang,Yin Siqi,Xie Zhongtian,Yang Debin.Analysis of Lamina Emergent Slider Mechanisms Based on Series Triple—LET[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(6):381-386.
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基于串联式Triple—LET的LEMs滑块机构分析   [下载全文]
Analysis of Lamina Emergent Slider Mechanisms Based on Series Triple—LET   [Download Pdf][in English]
投稿时间:2016-01-15  
DOI:10.6041/j.issn.1000-1298.2016.06.050
中文关键词:  Triple—LET柔性铰链  弯曲等效刚度  平面折展机构  滑块机构  修正系数
基金项目:国家自然科学基金项目(51475037)
作者单位
邱丽芳 北京科技大学 
印思琪 北京科技大学 
谢仲添 北京科技大学 
杨德斌 北京科技大学 
中文摘要:设计了一种基于串联式的Triple—LET新型柔性铰链,给出了该铰链的三维结构,并对其进行了弯曲等效刚度的理论分析,推导了该结构形式铰链的弯曲等效刚度计算公式并给出了修正系数。基于修正的弯曲等效刚度理论计算公式,对设计实例进行了分析计算,同时建立了该设计实例的有限元仿真模型,通过理论计算结果和仿真分析结果的比较,验证了该铰链设计的可行性。将该新型铰链应用于LEMs柔顺滑块机构的设计中,建立了该机构的基于修正弯曲等效刚度的伪刚体模型,并加工了该串联式Triple—LET铰链的滑块机构铍青铜实物模型,理论计算和实测结果基本一致,验证了理论模型的正确性和机构设计的可行性,同时也表明该滑块机构在工作状态具有较大变形,能保持较好的稳定性。
Qiu Lifang  Yin Siqi  Xie Zhongtian  Yang Debin
University of Science and Technology Beijing,University of Science and Technology Beijing,University of Science and Technology Beijing and University of Science and Technology Beijing
Key Words:Triple—LET flexure hinge  equivalent bending stiffness  lamina emergent mechanisms  slider mechanism  modified coefficient
Abstract:A new kind of flexure hinge, which was used on LEMs, named Triple—LET was proposed via connecting three outside LET flexure hinges, and its 3D structure was designed and analyzed. The equivalent bending stiffness of the Triple—LET flexure hinge was deduced and a modified coefficient was presented to optimize the results. Based on the modified formula of equivalent bending stiffness, the theoretical calculation of the design example was deduced,and the finite element simulation model of the design example was established and analyzed. Through comparing theoretical calculation results with finite element simulation results of the design example, the feasibility of the Triple—LET flexure hinge was verified. In order to verify the availability of the new flexure hinge in practical application, the Triple—LET flexure hinge was applied to a lamina emergent slider mechanism. The pseudo-rigid-body model of the lamina emergent slider mechanism was established based on the modified equivalent bending stiffness, and the physical model of the lamina emergent slider mechanism was made of beryllium bronze material based on the series Triple—LET flexure hinge. The theoretical calculation results and experimental results were basically consistent, therefore, the correctness of the theoretical model and the feasibility of the design example were verified, and it also indicated that the lamina emergent slider mechanism can implement large deformation and maintain a good stability in working status.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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