玉米摘穗秸秆切断单元体结构.docVIP

摘 要 近年来，我国政府继续加强玉米收获机械化工作力度，玉米机收呈现出全面、加速的良好态势。据统计，我国玉米主产区累计投入玉米联合收获机1.8万台，机收面积1.65亿亩，全国玉米机收水平超过33%，超过7个百分点的高速增长，进入Abstract In recent years, our government has continued to increase corn harvest mechanization efforts, corn machine income showing in full swing, accelerate the development of good posture. According to statistics, the main maize producing areas in China invested a total of 178,000 units of corn harvester machine income area of ??about 1.65 million acres of National Corn machine income level more than 33%, with the rapid growth of over 7 percent a year, enter the period of rapid development. Further improve the corn harvesting machinery production efficiency, especially to simplify the overall structure of the corn harvester cut, reduce energy consumption has become the top priority of the development of corn harvesting machinery. This issue through analysis of existing corn harvester, two lines of Knapsack cut harvesting machinery transmission parts optimization design, reliable performance, and layout to further simplify, save costs and reduce energy consumption. Part of the transmission main gearbox, driven pull the stem roller and reel sprocket about cutting gearbox, makes the compact through the design of the gearbox to reduce the transmission chain. Designed to further reduce costs, penetration of small corn harvester corn machine income has a very important reference. Keywords: Corn Harvester cutting table transmission gearbox cutting knife  目录 摘 要 Ⅰ Abstract（英文摘要） Ⅱ 目 录 Ⅲ 第一章 绪论………………………………………………………1 1.1 课程的背景及意义 1 1.2我国玉米收割机的发展历程及现状 2 1.3 玉米收获机械化的发展趋势及意义 3 1.4 本课题的主要研究内容 5 1.5 本章小结 6 第二章 总体方案设计 7 2.1 课题的主要参数及技术指标 7 2.2 总体传动方案的确定 7 2.2.1 整体方案设计 7 2.2.2 各部分传动比确定 8 2.2.3 各部分结构初选设计 9 2.3 本章小结 10- 第三章 各部分转动的选择设计计算 11 3.1 锥齿轮参数设计计算 11 3.1 .1主变速箱锥齿轮几何参数设计计算 11 3.1.2摘穗辊锥齿轮几何参数设计计算 12 3.1.3拨禾链传动轴锥齿轮几何尺寸设计计算 13 3.2 链轮参数设计计算 15 3.2.1 中间传动链轮设计计算 15 3.2.2 升运器链轮设计计算 15 3.3变速箱的设计 16 3.4 轴的设计 16 3.5 本章小结 17 第四章 校核计算 18 4.1 主动力箱锥齿轮校核 18