共轭凸轮正圆齿轮水稻钵苗移栽机构结构设计.doc

共轭凸轮-正圆齿轮水稻钵苗移栽机构的结构设计 摘 要 我国水稻栽种面积常年维持在3000万公顷左右，遍及大陆30个省，占我国稻谷总种植面积的30％，占世界谷物总种植面积的20％，水稻总产量约20000万吨，占我国粮食产量的40％，占世界谷物产量的35%，居世界第一位。提高水稻的生产能力及产量，是保障我国粮食安全的长期战略目标。随着我国城镇化进程的推进，可耕种面积逐年缩少，从事农业劳动人口数量逐年下降，而我国人口的不断增加导致对粮食需求的增长，粮食供给更加困难。所以在有限劳动力及耕种面积的约束下，提高水稻生产机械化水平显得尤为重要。 为提高水稻产量，农艺专家经多年比较试种证明，水稻钵苗移栽技术由于不伤秧根、无缓苗期、秧苗低节位分蘖多，对于提高水稻产量具有明显优势（相对于插秧可以提高产量10%-20%），而且可以实现省种、节肥、节水、节约成本、提高品质和增加粮食产量的目的，并且可以提高复种指数。 本文突破移栽机构的传统结构，成功设计出了一种“共轭凸轮——正圆齿轮行星轮系水稻钵苗移栽机构”，主要研究内容如下： 1）根据移栽机构运动分析及优化软件获得的结果，利用AutoCAD2010软件，完成了共轭凸轮——正圆齿轮行星轮系水稻钵苗移栽机构的结构设计，为后续的样机试制提供基础性文件。 2）对共轭凸轮非圆行星轮系水稻钵苗移栽机构各部件设计时所要考虑的因素进行了讨论，并详述了非圆行星轮系牵引机构、摆动共轭凸轮机构及移栽臂的结构设计、安装及可能问题 3）为了装配方便，首先将移栽机构转90°作为初始安装位置，根据机构的传动关系确定了机构中共轭凸轮的初始安装角度为20°。 关键词：钵苗移栽机构；共轭凸轮；正圆齿轮行星轮系；结构设计 Structural Design of Transplanting Mechanism with Non-Circular Gear for Rice Pot Seedling Abstract Rice planting area in China perennial maintain at about 30 million hectares, throughout the mainland 30 provinces, accounting for 30% of the total rice planting area of China, accounting for 20% of the total cultivated area of world grain, rice total output of about 20000 tons, accounting for 40% of Chinas grain output, accounting for 35% of world cereal production, ranking first in the world.engaged in agricultural labor population decreased year by year, and the population of our country is increasing demand for grain growth, So in the limited cultivated area and labor constraints, improve the level of mechanization of rice production is particularly important. In order to improve the yield of rice, agronomic experts after years of comparative plant experimentally demonstrated that rice pot seedling transplanting technology due to not to hurt the seedling root, no slow at seedling stage, low seedling tillering, for improving the rice yield has obvious advantages (compared with transplanting can improve the yield of 10% - 20%), and to achieve provincial, fertilizer saving, water saving, cost saving, improve quality and increase food production, a