毕业设计（论文）-轻型载货汽车设计（驱动桥设计）（含全套CAD图纸）.doc

轻型载货汽车设计（驱动桥设计） 摘 要 本说明书阐述的内容是关于轻型客车驱动桥总成设计和计算过程。 驱动桥是汽车行驶系的重要组成部分，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。所以其设计质量直接关系到整车性能的好坏。所以在设计过程中，设计者本着严谨和认真的态度进行设计。 在方案论证部分，对驱动桥及其总成结构形式的选择作了具体的说明。本设计选用了单级减速器，采用的是双曲面齿轮啮合传动，尽量的简化结构，缩减尺寸，有效的利用空间，充分减少材料浪费，减轻整体质量。由于是轻型货车，主要形式在路面较好的条件下，因此没有使用差速锁。 在设计计算与强度校核部分，对主减速器主从动齿轮、差速器齿、轮车轮传动装置和花键等重要部件的参数作了选择。同时也对以上的几个部件进行了必要的校核计算。 关键词：驱动桥，轻型客车，差速器，主减速器 THE DESIGN OF LIGHT DRIVE ABSTRACT The main content of this literature is the process of the design and calculation of the drive axle for mini-bus. As one of main component of vehicle drive line, its basic effect is to enlarge the torques that comes from the drive shafts or directly from the transmission, and distributes the torques to side wheels, and make the side wheels have the differential drive axle has an important effect on vehicle performance, therefore, we should keep a serious and earnest attitude during the course of design. In the part of selection and argumentation ,a concrete description of structure form of drive axle and its assemblies are made. In this design, it has selected the single-grade main-reducer drive axle, it is two hypoid gears, it can simplify the structure, reduce the size, make effect use of the space and materials, reduce the whole quality.. In the part of designing conclusion and strength check, parameter of the essential units such as the speed reduction,differential,wheel drive mechanism and so on are selected. At the same time, the author makes the strength check to the main speed reduction,differential wheels drive mechanism. Key words ：drive axle ,mini-bus ,differential gear, main-reducer 目 录 前言…………………………………………………………1 第一章 驱动桥的结构方案分析…………………….2 第二章 主减速器齿轮的设计………………………….4 §2.1 主减速器的结构形式………………………………4 §2.2主减速器主动锥齿轮的支撑形式及安置方法……4 §2.3主减速比的确定……………………………………5 §2.4主减速器齿轮计算载荷的确定……………………6 §2.4.1 从动齿轮计算载荷的确定…………………………6 §2.4.2主动齿轮的计算转矩……………………………7 §2.5主减速器齿轮基本参数的选择………………7 §2.5.1主、从动齿轮齿数的选择…………………………8 §2.5.2从动齿轮节圆