Optimal Design and Experiment of Rice Pot Seedling Transplanting Mechanism with Planetary Bezier Gears

Abstract

<meta name=citation_journal_title content=Biological Engineering Transactions><meta name=citation_publisher content=American Society of Agricultural and Biological Engineers><meta name=citation_author content=Maile Zhou><meta name=citation_author content=Liang Sun><meta name=citation_author content=Xiaoqiang Du><meta name=citation_author content=Yun Zhao><meta name=citation_author content=Liang Xin><meta name=citation_title content=Optimal Design and Experiment of Rice Pot Seedling Transplanting Mechanism with Planetary Bezier Gears><meta name=citation_publication_date content=2014><meta name=citation_volume content=57><meta name=citation_issue content=6><meta name=citation_firstpage content=1537><meta name=citation_lastpage content=1548><meta name=citation_doi content=10.13031/trans.57.10638><meta name=citation_journal_abbrev content=Biol. Eng. Trans.><meta name=citation_abstract_html_url content=http://elibrary.asabe.org/abstract.asp?aid=45273&t=1&redir=&redirType=><meta name=citation_fulltext_html_url content=https://elibrary.asabe.org/azdez.asp?JID=3&AID=45273&CID=t2014&v=57&i=6&T=1><meta name=citation_pdf_url content=https://elibrary.asabe.org/azdez.asp?JID=3&AID=45273&t=2&v=57&i=6&CID=t2014&downPDF=Y><meta name=citation_issn content=2330-0337><meta name=citation_issn content=2162-643X><meta name=citation_language content=English><meta name=citation_keywords content=Bezier; Non-circular gear; Physical prototype; Pot seedling pickup experiment; Rice pot seedling; Transplanting mechanism; Virtual simulation.> After analyzing its trajectory and attitude requirements, a rice pot seedling transplanting mechanism with planetary Bezier gears that was designed by using a fitted Bezier curve as a non-circular gear pitch curve is proposed. In addition, the transmission characteristics of this mechanism were analyzed. A kinematic model of a rice pot seedling transplanting mechanism with planetary Bezier gears was established. Analysis and optimization software for the transplanting mechanism was developed and used to obtain a group of optimized parameters for a transplanting mechanism that met the requirements of rice pot seedling transplanting. The numerical model of the non-circular gear shaping process based on the pitch curve point set was deduced. Three-dimensional modeling software for a non-circular gear was also developed and used to model the Bezier gear. A virtual prototype of the transplanting mechanism was established and simulated using ADAMS software. A physical prototype of the transplanting mechanism was assembled and mounted on a self-developed transplanting test rig on which high-speed photography experiments and pot seedling pickup experiments were conducted. The results of the theoretical analysis, virtual test, and physical prototype test were essentially identical, which verified the validity of the theoretical model, optimization software, virtual prototype, and physical prototype.