机械5

九吨级驱动桥桥壳设计研究 摘要：汽车的驱动桥处于传动系的尾端，是汽车的特别重要的一个部件，它的基本功用是增大由传动轴或直接由变速器传来的转矩，将转矩分配给左、右驱动车轮，并使两个车轮具备汽车行驶运动学所要求的差速功效。而本文则重点介绍9吨级加强型驱动桥设计的全过程。这对于我们以后从事设计工作是非常有用的。 关键词：主减速器；桥壳；差速器；后桥 Study o
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ntial 目录 1绪论1 2驱动桥的结构组成、功能、工作特点及设计要求2 3主减速器3 3.1主减速器的功能和结构形式3 3.1.1主减速器的齿轮类型3 3.1.2主减速器的减速形式3 3.2主减速器齿轮的主要参数和强度计算3 3.2.1减速器齿轮载荷的确定3 3.2.2主减速器准双曲面齿轮参数4 3.2.3主减速器齿轮的强度设计计算5 3.2.4主减速器锥齿轮轴承的载荷计算7 4差速器13 4.1差速器齿轮参数的选择和计算11 4.1.1差速器的作用及型式的选择11 4.1.2行星齿轮球面半径的确定12 4.1.3行星齿轮和半轴齿轮齿数、 12 4.1.4差速器圆锥齿轮模数及半轴齿轮节圆直径的初步确定13 4.1.5压力角和轴交角13 4.1.6半轴齿轮齿面宽13 4.1.7齿侧间隙的选择14 4.2差速器齿轮强度的计算14 4.2.1计算部位14 4.2.2负荷条件14 4.2.3差速齿轮的强度计算15 5驱动桥壳16 5.1本次设计的驱动桥壳的有关参数16 5.2驱动桥壳的结构选择17 5.3桥壳的受力分析及强度计算18 5.3.1危险断面距车轮中心的距18 5.3.2危险断面系数的计算19 5.3.3三种工况下桥壳载荷的计算21 6驱动桥螺旋锥齿轮的优化设计27 6.1建立优化数学模型27 6.1.1目标函数27 6.1.2约束条件28 6.1.3数学模型28 6.1.4应用MATLAB进行计算29 7总结与展望30 致谢31 参考文献： 32