毕业设计 制育秧钵机的改进设计.doc

目 录 摘要·······························································1 第一章 绪论······························································3 1.1 选题的来源·························································3 1.2 本课题在国内外的研究状况与展望····································3 1.3 制育秧钵机的基本设计要求··········································5 1.4 主要设计工作······················································5 第二章 改进型制育秧钵机的方案设计········································6 2.1 工艺方案分析······················································6 2.2 新方案的形成······················································7 第三章 工作机构的设计···················································10 3.1 工作机构的功能···················································10 3.2 对工作机构的要求·················································10 3.3 拟定机器的工作原理图和运动循环图·································12 3.4 方案确定·························································13 3.4.1 模孔转盘方案的讨论·······································13 第四章 传动机构的设计···················································15 4.1 电动机的选择·····················································15 4.1.1电动机的功率确定············································15 4.1.2选择电动机··················································16 4.2 确定各传动机构的传动比··········································17 4.3 计算各轴的转速和功率·············································18 第五章 主要零件的结构设计与强度校核·····································20 5.1 模孔转盘的结构设计和尺寸计算····································20 5.2 转盘齿轮的结构设计和尺寸计算·····································20 5.3 曲柄（偏心轮）滑块（滑杆）机构的设计和尺寸计算···················21 5.4 锥齿轮的结构设计和尺寸计算·······································25 5.5 直齿圆柱齿轮的结构设计和尺寸计算·································29 5.6 带轮的结构设计和尺寸计算········································29 5.7 轴的结构设计和尺寸计算··········································34 5.8 主要零件的强度校核·················································36 第六章 设计总结·························································41 参考文献······························