二轴式变速器毕业设计说明书-液控式四速自动变速器设计.doc

目 录 第一章 绪论······························································1 第二章 变速器的基本设计方案··············································6 2.1概述···································································6 2.2变速器的结构分析与型式选择·············································6 2.3轿车变速器机构方案的选择···············································9 2.4变速器设计的基本要求··················································10 第三章 变速器齿轮的设计·················································11 3.1档位数的确定及传动的初选 ·············································11 3.2确定中心距····························································11 3.3初选齿轮参数··························································11 第四章 齿轮校核·························································14 4.1计算各轴的转矩························································14 4.2轮齿强度计算·························································14 第五章 轴的设计及校核···················································18 5.1轴的工艺要求·························································18 5.2轴的强度计算·························································18 第六章 轴承校核·························································21 6.1 输入轴的轴承校核···················································21 6.1 输出轴轴承校核·····················································22 第七章 同步器的设计·····················································24 7.1 同步器的结构·························································24 7.2 同步器的主要参数确定·················································25 第八章 变速器的操纵机构·················································27 8.1 变速器操纵机构的功能·················································27 经济技术分析·····························································28结论·····································································30 参考文献····························································31 致谢·············································································32 液控式四速自动变速器设计 绪论 汽车是作为一种交通工具而产生的，但发展到今天已经不能把它理解为单纯的行的手段因为“汽车化”改变了当代世界的面貌，它已经成为当代物质文明与