前插式双控差速行星系分插机构的运动特性及参数分析

Kinematical properties and parameter analysis of forward double controlled transplanting mechanism with differential planetary system

针对传统高速分插机构均为多组非圆齿轮组成,安装和制造难度较大等问题,提出了一种双控差速行星系分插机构。分析了该分插机构的工作原理并建立其运动分析模型;采用RecurDyn虚拟样机仿真和MATLAB数值仿真等方法,对该理论分析模型和机构各参数与秧针栽插动静轨迹之间的关系进行研究。选取椭圆齿轮偏心率为0.13、插植臂长度135mm、插植臂箱体与y轴的初始夹角50°、插植臂与回转箱体的初始夹角35°和插植臂回转箱体回转半径90mm进行分析,结果表明:插秧株距为180~220mm时该分插机构能满足水稻插秧要求。

For the tradition super-speed transplanting mechanism was usually made up of multigroup non-circular gears, which would increased the difficulty of installation and manufacture,a forward double controlled transplanting mechanism with differential planetary system was proposed.The analytical model of mechanism kinematics was built basing on its working principle in this research.The relationship between the parameters of the transplanting mechanism and the dynamic as well as static track of seedling needle were analyzed by RecurDyn and MATLAB.Parameters,such as centricity ratio of elliptical gear of 0.13,planting arm length of 135mm,initial angle of planting arm box with axis y of 50,initial angle of planting arm with rotation box of 35and turning radius of planting arm rotation box of 90mm were selected and analyzed.The result indicated that it would meat the requirement of the rice transplanting when the crop row spacing was between 180-220mm.