本科毕业论文——汽车差速器与主减速器设计dgqgx.doc

本科毕业论文——汽车差速器与主减速器设计 摘要 关键词：建模，差速器，主减速器，分析 I Abstract This paper discusses the automobile differential design and modeling process of the final drive, and the structure and the principle of automobile differential and the final drive.the car After the analysis and calculation of final drive and differential,to use Pro/E to complete make 3D model of the final drive and differential, then to produce 2D drawings.There is going to analysis the final drive to prove the principle after finishing the composing. Keywords: Modeling, Differential,Final drive，Analysis II 目录 摘要 ................................................................... I Abstract .............................................................. II 目录 ................................................................. III 1绪论 ................................................................. 1 1.1课题来源 ........................................................ 1 1.2课题研究现状 .................................................... 1 1.2.1国内外汽车行业CAD研究与应用情况 .......................... 1 1.3主减速器的研究现状 .............................................. 1 1.4 差速器的研究现状 ............................................... 2 1.5 课题研究的主要内容 ............................................. 3 2QY7180概念轿车主减速器与差速器总体设计 ............................... 4 2.1QY7180概念轿车主要参数与主减速器、差速器结构选型 ............... 4 2.1.1QY7180概念轿车的主要参数 .................................. 4 2.1.2QY7180概念轿车主减速器与差速器结构选型 .................... 4 2.2主减速器与差速器的结构与工作原理 ................................ 5 2.3QY7180概念轿车主减速器主减速比i0的确定 ......................... 6 3主减速器和差速器主要参数选择与计算 ................................... 7 3.1主减速器齿轮计算载荷的确定 ...................................... 7 3.1.1按发动机最大转矩和最低档传动比确定从动齿轮的计算转矩Tce .. 7 3.1.2按驱动车轮打滑转矩确定从动齿轮的计算转矩Tcs .............. 7 3.1.3按日常平均使用转矩来确定从动齿轮的计算转矩 ................ 8 3.2主减速器齿轮传动设计 ............................................ 8 3.2.1按齿面接触强度设计 ........................................ 8 3.2.2按齿根弯曲强度设计 ....................................... 10 III 3.2.3按变速器一