步行式偏心-变位齿轮行星轮系宽窄行分插机构运动分析

为实现水稻宽窄行插秧,该文将偏心-变位齿轮行星轮系应用于步行式水稻插秧机分插机构中,并设计专用传动箱以满足水稻宽窄行插秧时秧针轨迹和姿态要求。分析了其结构特点和工作原理,建立了该机构运动学分析模型,编写了计算机辅助分析、仿真及优化程序,得到一组满足步行式宽窄行插秧的机构参数,建立了三维虚拟仿真模型,并在ADAMS中进行了虚拟试验,同时研制了样机并进行田间试验。试验结果表明宽行行距为403mm,窄行行距为197mm。虚拟试验和田间试验表明该分插机构满足步行式水稻插秧机宽窄行插秧的农艺要求。

Kinematics analysis on wide-narrow row walking-type transplanting mechanism with eccentric and eccentric-modified planet gears

In order to realize wide-narrow row rice transplanting, the eccentric gears and eccentric-modified gears were used to the walking-type rice transplanting mechanism, and transmission case was designed to satisfy the seedlings needle track and pose of wide-narrow row rice transplanting mode in this paper. Its structural characteristics and working principle were illustrated and kinematical analysis models were set up. Computer aided analysis, simulation and optimization program were compiled, and structural parameters of the transplanting mechanism were optimized, which satisfied the working requirements of walking-type rice transplanter. 3D design of the transplanting mechanism was accomplished, and virtual prototype test was finished in ADAMS and physical prototype was developed, and then field test was accomplished. The results were as follow: wide row was 403 mm, and narrow row was 197 mm. The transplanting mechanism can meet the working requirements of wide-narrow row walking-type rice transplanter.