蔬菜移栽机斜齿轮-非圆齿轮行星轮系取苗机构研究  

Design and Experiment of Seedling Picking Mechanism for Helical Gear-Non Circular Gear Planetary Gear System

作　　者：周海丽 刘建刚 俞高红[1,2] 齐鹏 王磊 郑剑[4] ZHOU Haili;LIU Jian’gang;YU Gaohong;QI Peng;WANG Lei;ZHENG Jian(School of Mechanical Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China;Zhejiang Province Key Laboratory of Transplanting Equipment and Technology,Hangzhou 310018,China;College of Mechanical and Electrical Engineering,Wuyi University,Nanping 354300,China;Hangzhou Hangyang Turbomachinery Co.,Ltd.,Hangzhou 310011,China)

机构地区：[1]浙江理工大学机械工程学院,杭州310018 [2]浙江省种植装备技术重点实验室,杭州310018 [3]武夷学院机电工程学院,南平354300 [4]杭州杭氧透平机械有限公司,杭州310011

出　　处：《农业机械学报》2023年第8期77-86,共10页Transactions of the Chinese Society for Agricultural Machinery

基　　金：上海市科技兴农项目(沪农科创字(2021)第4-1号);国家重点研发计划项目(2022YFD2001800);国家自然科学基金项目(52075497、32201676);福建省自然科学基金项目(2021J011133)。

摘　　要：针对完全非圆齿轮行星轮系取苗机构存在推苗角不够大,而不完全非圆齿轮轮系取苗机构存在冲击的问题,本文设计了一种满足蔬菜移栽取苗要求的具有较大推苗角的非圆完全齿轮行星轮系取苗机构。基于傅里叶函数设计了一种二次不等幅传动比曲线,开发取苗机构设计分析软件,分析傅里叶系数对取苗轨迹的影响规律,研究傅里叶系数对传动比曲线及从动轮和秧针速度特性的影响,揭示傅里叶系数对取苗机构运动学参数的影响规律,推导了不同傅里叶系数时取苗机构取苗角和推苗角的变化规律。制造和装配取苗机构,基于虚拟样机、高速摄像技术对取苗机构进行了旋转试验,通过对比取苗轨迹的理论、仿真和试验值一致性验证了取苗机构设计的可行性。对取苗机构进行了台架取苗试验,得出转速40、50、60 r/min时取苗机构的取苗成功率分别为94%、90%和88%,通过取苗试验进一步验证了取苗机构设计的可行性。There is a problem of insufficient pushing angle in the seedling picking mechanism of the complete non circular gear planetary gear system,while there is an impact on the seedling picking mechanism of the incomplete non circular gear system.A non circular complete gear planetary gear system seedling picking mechanism was designed with a large pushing angle that met the requirements of vegetable seedling picking.Based on Fourier function,a quadratic unequal amplitude transmission ratio curve was designed,and the influence of Fourier function coefficient on the seedling path was analyzed.The change relationship of Fourier function coefficient on the transmission ratio curve and the angular displacement of the driven gear was studied.The change law of Fourier coefficient on the dynamic parameters of the seedling picking mechanism was revealed.The change relationship of Fourier function coefficient on the seedling picking angle and the seedling pushing mechanism was deduced.Manufacturing and assembling the seedling picking mechanism.Based on the virtual prototype and high-speed camera technology,the rotation test of the seedling picking mechanism was carried out.The feasibility of the design of seedling experimental values of the seedling picking trajectory was done.The seedling picking mechanism was tested on the platform.The success rates of the seedling picking mechanism at different rotational speeds(40 r/min,50 r/min,60 r/min) were 94%,90% and 88%,respectively.The feasibility of the design of the seedling picking mechanism was further verified by the seedling picking experiment.

关 键 词：蔬菜移栽机 取苗机构 傅里叶系数 非圆齿轮 推苗角 

分 类 号：S223.9[农业科学—农业机械化工程]