微型汽车驱动桥毕业设计.docVIP

摘 要 本次设计的题目是驱动桥。驱动桥一般由主减速器、差速器、半轴及桥壳四部分组成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：采用整体式驱动桥，主减速器的减速型式采用级减速器，主减速器齿轮采用螺旋锥齿轮，差速器采用普通对称式圆锥行星齿轮差速器，半轴采用浮式型式，桥壳采用整体式桥壳。在本次设计中，主要完成了级减速器、圆锥行星齿轮差速器、浮式半轴的设计桥壳工作。Abstract The object of the design is the design for driving axle of mini-car of SongHuajiang driving axle is consisted of final drive, 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 , the developing process and advantages and disadvantages of the former type of driving axle, single reduction gear for main decelerator’s deceleration form, spiral bevel gear for main decelerator’s gear, half floating for axle and stamp-welded steel sheet of integral axle housing for axle housing. In the design, we accomplished the design for single reduction gear, tapered planetary gear differential mechanism, half floating axle, the checking of axle housing and CAD drawing and so on. Key words: Driving Axle; Final Drive; Design; Differential 目 录 摘 要 I Abstract II 第1章 绪论 1 1.1 驱动桥的结构和种类 1 1.1.1 汽车车桥的种类 1 1.1.2 驱动桥的种类 1 1.1.3 驱动桥结构组成 2 1.2 设计内容 8 第2章 设计方案的确定 9 2.1 设计主要参数 9 2.2 主减速器结构方案的确定 9 2.2.1 主减速器齿轮的类型的选择 9 2.2.2 主减速器主动锥齿轮的支承形式及安装方式的选择 9 2.2.3 从动锥齿轮的支承方式和安装方式的选择 10 2.2.4 主减速器的轴承预紧及齿轮啮合调整 10 2.2.5 主减速器的减速形式 10 2.3 差速器结构方案的确定 11 2.4 半轴型式的确定 11 2.5 桥壳型式的确定 11 2.6 本章小结 12 第3章 主减速器设计