后驱动桥毕业设计.doc

摘 要 根据车桥能否传递驱动力，汽车车桥分为驱动桥和从动桥。驱动桥的结构型式按齐总体布置来说共有三种，即普通的非断开式驱动桥，带有摆动半轴的非断开式驱动桥和断开式驱动桥。本设计对象是轻型低速载货汽车的后驱动桥。 本设计完成了轻型低速载货汽车的后驱动桥中主减速器、差速器、减震器、钢板弹簧及桥壳等部件的设计。根据轻型低速载货汽车的后驱动桥的要求，通过选型，确定了主减速器传动副类型，差速器类型，驱动桥半轴支承类型减震器类型和钢板弹簧类型。通过设计计算，确定了主减速比，主、从动锥齿轮、差速器、半轴、减震器、钢板弹簧以及桥壳的主要参数和结构尺寸。 利用Pro/E软件画出所有零部件的三维视图及装配图和总装配图然后生成工程图，通过主要零部件的校核计算和利用CAD对主要零部件就行二维绘图，确定所设计的能够满足设计要求。 关键词：汽车后桥；主减速器；差速器；减震器；钢板弹簧 Abstract According to the axle can transfer the driving force, the car axle is divided into a drive axle and a driven axle. Drive bridge structure according to the general layout, with a total of three species, namely ordinary non-break drive bridge, a swing axle non-break drive axle and a broken axle. The object of this design is light-duty low-speed truck drive axle. Completion of the design of light truck speed rear driving axle main reducer, differential, shock absorber, a leaf spring and the axle housing and other components of the design. In this paper, according to the light of low-speed truck drive axle requirements, through the selection, determination of main reducer transmission pair type, differential type, drive axle bearing type shock absorber type and the leaf spring type. Through design calculation, determine the main reduction ratio, main, the driven bevel gear, differential gear, axle, shock absorber, steel plate spring and axle housing main parameters and dimensions. Using Pro/E software to draw all the parts of the three-dimensional- view and assembly drawings and assembly drawings and then generate engineer- ing drawing, the main components of the calculation and use of CAD on the key parts on the line drawing, determine the design can meet the design requirements. Key Words: automobile rear axle ;main reducer;differential device ;shock absorber; plate spring 目 录 摘要……………………………………………………………………………Ⅰ Abstract………………………………………………………………………Ⅱ 第1章 绪论…………………………………………………………………1 1.1 本课题的来源、基本前提条件和技术要求………………………1 1.2 本课题要解决的主要问题和设计总体思路………………