非圆齿轮行星轮系自动取苗机构逆向设计分析

单自由度传动机构实现复杂轨迹和姿态要求是机构设计难点,该文针对穴盘苗取苗机构运动要求开展非圆齿轮行星轮系传动机构的逆向设计研究,提出基于输出构件相对转角单调性的机构可再现轨迹判定准则,对于给定的预期轨迹,通过相对转角曲线的单调性判断非圆齿轮行星轮系传动的适用性;在预期轨迹的规划上研究轨迹关键点的设置方法以利于非圆齿轮的传动比设计,给出在满足机构工作轨迹和姿态要求下轨迹型值点的确定流程,编写机构的设计软件确定一组机构参数,通过ADAMS进行了机构仿真验证。研究结果表明,轨迹与送钵装置最小距离为21 mm,取苗尖嘴宽度为2.07 mm,尖嘴倾角为136.4°,取苗臂在入钵段摆角为24.3°,出钵段...

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Published in农业工程学报 Vol. 31; no. 16; pp. 30 - 36
Main Author 赵雄 王川 杨茂祥 孙良 陈建能
Format Journal Article
LanguageChinese
Published 浙江省种植装备技术重点实验室,杭州 310018%浙江理工大学机械与自动控制学院,杭州,310018 2015
浙江理工大学机械与自动控制学院,杭州 310018
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ISSN1002-6819
DOI10.11975/j.issn.1002-6819.2015.16.005

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Summary:单自由度传动机构实现复杂轨迹和姿态要求是机构设计难点,该文针对穴盘苗取苗机构运动要求开展非圆齿轮行星轮系传动机构的逆向设计研究,提出基于输出构件相对转角单调性的机构可再现轨迹判定准则,对于给定的预期轨迹,通过相对转角曲线的单调性判断非圆齿轮行星轮系传动的适用性;在预期轨迹的规划上研究轨迹关键点的设置方法以利于非圆齿轮的传动比设计,给出在满足机构工作轨迹和姿态要求下轨迹型值点的确定流程,编写机构的设计软件确定一组机构参数,通过ADAMS进行了机构仿真验证。研究结果表明,轨迹与送钵装置最小距离为21 mm,取苗尖嘴宽度为2.07 mm,尖嘴倾角为136.4°,取苗臂在入钵段摆角为24.3°,出钵段摆角为3.6°,投苗角为76°,齿轮模数为2.53 mm,轨迹高度为285 mm,轨迹最低位置与行星架最低点距离为34 mm,单级非圆齿轮最大传动比降为1.81,该研究为非圆齿轮行星轮系传动的设计提供了参考。
Bibliography:Zhao Xiong, Wang Chuan, Yang Maoxiang, Sun Liang, Chen Jianneng(1. Faculty of Mechanical Engineering & Automation, Zhejiang SciTech University, Hangzhou 310018, China; 2. Key Laboratory of Transplanting Equipment and Technology of Zhefiang Province, Hangzhou 310018, China)
Seedling pick-up mechanism is the core mechanism of dry land automatic transplanting machine, and it replaces the traditional manual labor, which picks up seedlings from seedling box folder and sends the single seedling to the planting machine. The dry land automatic transplanting machines in Japan, South Korea and other countries adopt to bar and slider mechanism scheme or adopt chute in combination mechanism scheme, but they lack efficiency. China scholars do a lot of researches on making use of non-circular planetary gear train to achieve special non-circular trajectory, and this kind of transmission is a potential type of effective seedling pick-up mechanism, but it's very difficult to design non-circular planetary gear train mechanism w
ISSN:1002-6819
DOI:10.11975/j.issn.1002-6819.2015.16.005