毕业设计（论文）-Kd1080型载货汽车后桥总成设计（含全套CAD图纸）.doc

Kd1080型载货汽车后桥总成设计 摘 要 本设计为中型载货汽车的后桥总成设计。在本设计中后桥为驱动桥，是汽车传动系主要总成之一，具有承载车身和驱动汽车的功用。后桥设计应满足汽车动力性，经济性的要求，并符合汽车运动学规律。 根据本车的各项具体参数，经过必要的论证分析，确定了本次所设计的驱动桥的结构方案。后桥采用非断开式驱动桥壳，单级螺旋锥齿轮主减速器，对称式圆锥行星齿轮差速器，半浮式支承半轴，驱动车轮为四个，后桥采用轴承为圆锥滚子轴承。在已知主传动比的情况下，选择准螺旋锥齿轮主减速器齿轮的型式，目的是为了降低成本,并且工作平稳，噪声小。对称式圆锥行星齿轮差速器结构简单，使用可靠。半浮式半轴结构简单，所受载荷较大。圆锥滚子轴承承载能力强，且有利于主减速器齿轮副调整。 在说明书的计算部分，说明了主要参数选择的依据，对主减速器，差速器，半轴和驱动桥壳进行了尺寸和强度计算。此外，还计算了主减速器支撑轴承的寿命。本文提供了关于以上计算的详细计算依据、步骤和计算数据。 关键词：驱动桥，半轴齿轮，差速器，半轴 DESIGN OF REAR AXLE FOR MEDIUM GOODS VEHICLE ABSTRACT The aim of this project is to design the rear axle for the medium goods vehicle. The rear axle acts as the driving axle in this project., which is used to bear the frame and drive the car. The design of the rear axle should meet with the requirement of the performance of power and economic, and the same time, it must be accord to the principle of the mechenics of vehicle. According the specific parameters of the driving system and necessary reasoning, this rear axle conclude the integrated driving axle housing, the main drive of single spiral bevel gear ,the differential with taper planetary gear, the half axle and so on. There are four driving wheel and the bearings that the rear axle used are both taper roller bearings. With the provision of the drive ratio, the spiral bevel gear is selected in this design, which aimed to minimize the cost and make little noise. The differential with the symmetric taper planetary has a relatively simple structure, and it is reliable. The calculation section of this paper is mainly concerning about the physical dimension of the gear of the main drive and the differential,the driving axle, and the strength proofread of it. In addition, the strength proofread of it. In addition, the life of the bearing of the main drive is also calculated in this section.Majority of computations basis,the step and the estimated data for these project and advanced in paper. KEY WORDS: Driving axle, Hypoid gear, Differential, Axle shaft 目 录 前