1、 I 摘 要 驱动桥是构成汽车的四大总成之一，一般由主减速器、差速器、车轮传动装置和驱 动桥壳等组成，它位于传动系末端，其基本作用是增矩、降速，承受作用于路面和车架 或车身之间的力。它的性能好坏直接影响整车性能，而对于载重汽车显得尤为重要，采 用传动效率高的单级减速驱动桥已经成为未来载重汽车的发展方向。 本文参照传统驱动桥的设计方法进行了载重汽车驱动桥的设计本次设计首先对驱 动桥的特点进行了说明， 根据给定的数据确定汽车总体参数， 再确定主减速器、 差速器、 半轴和桥壳的结构类型及参数，并对其强度进行校核。数据确定后，利用 AUTOCAD 建立二维图，再用 CATIA 软件建立三维模型，最后用
2、 CAITA 中的分析模块对驱动桥壳 进行有限元分析。 关键词：驱动桥；CAD；CATIA；有限元分析 II Abstract Drivie axle is one of the four parts of a car, it is generally constituted by the main gear box, the differential device, the wheel transmission device and the driving axle shell and so on it is at the end of the powertrain.Its basic fu
3、nction is increasing the torque and reducing speed and bearing the force between the road and the frame or body.Its performance will have a direct impact on automobile performance,and it is particularly important for the truck. Using single stage and high transmission efficiency of the drive axle ha
4、s become the development direction of the future trucks. This article referred to the traditional driving axles design method to carry on the truck driving axles design.In this design,first part is the introduction of the characteristics of the drive axle,according to the given date to calculate the
5、 parameters of the automobile,then confirm the structure types and parameters of the Main reducer, differential mechanism,half shaft and axle housing,then check the strength and life of them.After confirming the parameters, using AUTOCAD to establish 2 dimensional model,then using CATIA establish 3
6、dimensional model. Finally using the analysis module in CATIA to finite element analysis for the axle housing. Key words: drive axle;CAD;CATIA;finite element analysis III 目 录 1 绪论 1 1.1 驱动桥简介 1 1.2 国内外研究现状 2 1.3 驱动桥设计要求 2 2 驱动桥设计 4 2.1 主减速器设计 5 2.1.1 主减速器的结构形式 5 2.1.2 主减速器基本参数选择与计算载荷的确定 7 2.1.3 小结 . 17 2.2 差速器设计. 17 2.2.1 对称锥齿轮式差速器工作原理 . 18 2.2.2 对称式圆锥行星齿轮差速器的结构 . 19 2.2.3 对称式圆锥行星齿轮差速器的设计 . 19 2.2.4 小结 错误错误!未定义书签。未定义书签。 2.3 驱动半轴的设计 错误错误!未定义书签。未定义书签。 2.3.1 结构形式分析 错误错误!未定义书签。未定义书签。 2.3.2 全浮式半轴的结
