狮跑汽车后桥毕业设计.doc

摘 要 驱动桥是汽车总成中的重要承载件之一，其性能直接影响整车的性能和有效使用寿命。一般由主减速器、差速器、半轴及桥壳四部分组成，其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、右车轮，并使左、右驱动车轮具有汽车行驶运动学所要求的差速功能；此外，还要承受作用于路面和车架或车厢之间的铅垂力、纵向力和横向力。 本首先论述了驱动桥的总体结构，在分析驱动桥各部分结构型式、发展过程及其以往形式的优缺点的基础上，确定了总体设计方案：桥壳采用在本次设计中，主要完成了的设计桥壳工作。关键词 驱动桥；；；；；ABSTRACT Driving axle assembly is one of the important vehicle carrying pieces and can directly impact on the whole vehicles performance and its effective life. Driving Axle is consisted of Main Decelerator, Differential Mechanism, Half Shaft and Axle Housing. The basic function of Driving Axle is to increase the torque transmitted by Drive Shaft or directly transmitted by Gearbox, then distributes it to left and right wheel, and make these two wheels have the differential function which is required in Automobile Driving Kinematics; besides, the Driving Axle must also stand the lead hangs down strength, the longitudinal force and the transverse force acted on the road surface, the frame or the compartment lead. The configuration of the Driving Axle is introduced in the thesis at first. On the basis of the analysis of the structure and the developing process of Driving Axle, the design adopted the Integral Driving Axle, Single Reduction Gear for Main Decelerator’s deceleration form, Spiral Bevel Gear for Main Decelerator’s gear, Full Floating for Axle and Casting Integral Axle Housing for Axle Housing. In the design, we accomplished the design for Double Reduction Gear, tapered Planetary Gear Differential Mechanism, Full Floating Axle, the checking of Axle Housing and the election of the material and so on. Key words: Driving Axle；Single；Main Decelerator；Gear；Material；Computer Aided Design  目 录 摘要 I Abstract II 第1章 绪论 1 1.1选题的目的和意义 1 1.2 研究现状 2 1.1.1 国内现状 2 1.1.2 国外现状 2 1.3 驱动桥的结构和种类 4 1.3.1 汽车车桥的种类 4 1.3.2 驱动桥的种类 4 1.3.3 驱动桥结构组成 5 1.4 完成主要内容 9 第2章 设计方案的确定 10 2.1 主要设计参数 10 2.2 主减速比的计算 10 2.3 主减速器结构方案的确定 11 2.4 差速器结构方案的确定 12 2.5 半轴型式的确定 12 2.6 桥壳型式的确定 12 2.7 本章小结 12 第3章 主减速器设计 14 3.1 主减速齿轮计算载荷的确定 14