1、 I 摘 要 本次毕业设计的题目是中型货车驱动桥设计。驱动桥是汽车传动系统的重要 组成部件,位于传动系的末端， 其功用是增大由传动轴或变速器传来的转矩， 将其 传给驱动轮并使其具有差速功能。 所以中型专用汽车驱动桥设计有着重要的实际 意义。 在本次设计中， 根据当今驱动桥的发展情况确定了驱动桥各部件的设计方案。 其中根据本次设计的车型为中型货车，故主减速器的形式采用双级主减速器，而 差速器则采用目前被广泛应用的对称式锥齿轮差速器，其半轴为全浮式支撑。在 本次设计中完成了对主减速器、差速器、半轴、桥壳及轴承的设计计算及校核并 通过以上计算满足了驱动桥的各项功能。此外本设计还应用了较为先进的设计软
2、 件，如用 MATLAB 进行计算编程和用 CAXA 软件绘图。 本设计保持了驱动桥有足够的强度、刚度和足够的使用寿命，以及足够的其 他性能。并且在本次设计中力求做到零件通用化和标准化。 关键词：驱动桥、主减速器、差速器、半轴、桥壳 II Abstract The graduation project is the subject of a medium goods vehicle driver in the design of the bridge. Bridge drive vehicle drive system is an important component parts, its
3、function is increasing drive shaft or transmission came from the torque, and its transmission to a driving wheel differential function. So medium-sized private car driver has a practical bridge design Significance. In the design of the bridge under the current drive the development of the driver ide
4、ntified the components of the bridge design. According to the design of this model for the medium-sized cars, so the main reducer in the form of a two-stage main reducer, and the current differential is being widely used symmetric bevel gear differential; its axle for the whole floating - Support. I
5、n the completion of the design of the main reducer, differential and axle, bearings and the bridge shell calculation and design verification. Through the above calculation and the drive to meet the various functions of the bridge. In addition the design of a more advanced design tools, such as MATLA
6、B calculated using CAXA software programming and graphics. This design has maintained a drive axle have sufficient strength, stiffness and sufficient life, and enough other properties. And in this design-to-common and standardized components. Key words：Drive Bridge, the main reducer, differential and axle, Shell Bridge III 目录 第 1 章 绪 论. 1 1.1 驱动桥简介 1 1.2 驱动桥设计的基本要求 1 第 2 章 驱动桥主减速器设计. 2 2.1 主减速器简介 2 2.2 主减速器形式选择 2 2.3 主减速器锥齿轮选择 3 2.4 主减速器齿轮支撑 4 2.5 主减速器轴承预紧 5 2.6 锥齿轮啮合调整 6 2.7 润滑 6 2.8 双曲面锥齿轮设计
