摘要本课题选用的驱动桥是非断开式驱动桥。因为它的应用前景广泛，有结构简单、造价低廉、工作可靠的优点。它的特点就在于桥壳是一根支撑在左、右驱动轮齿轮、及半轴等所有的传动部件之间的刚性空心梁。主齿轮箱采用的主减速器为组合式单级。单级较之双级的而言可大大减小驱动桥的部分质量。它具有简单的结构性、质量小、体积小、尺寸相对紧凑以及制造成本较低等等的优点。差速器采用的是对称式圆锥行星齿轮式。差速器的壳装在主减速器的动齿轮上。其具有结构简单、工作平稳、制造方便等的优点。另外，它采用的是可分离式的桥壳。整个桥壳可分为左、右两个部分的垂直平面，每一个部分均由一个壳体和一个外端的半轴驱动管组成。这种结构的特点就在于制造工艺简单、具有优良的主齿轮箱的轴承支承刚度。52526

本次设计从所要设计的汽车类型及使用、生产条件出发，并且与其他部件相互适应。最后，设计出规定要求的汽车驱动桥，建立相关三维实体模型，加以验证。从而确保能够实现其使用性能。

毕业论文关键词：低速车辆；非断开式；驱动桥；设计；建模；三维实体模型。

Abstract The drive axle is the non-drive off the bridge. Because of its broad application prospect, has the advantages of simple structure, low cost, reliable work. It is characterized in that the bridge shell is a support on the left, right driving rigid hollow beam between the wheel gear, and a half shaft and all drive components. The main gear box uses the main reducer for combined single stage. Single stage double level than the part quality can be greatly reduced the driving axle. It is structural, small quality, small volume, compact size and low manufacturing cost, has the advantages of simple. The differential is used in symmetric cone planetary gear type. Differential shell is arranged on the main reducer gear. It has the advantages of simple structure, stable work, convenient manufacture and other advantages. In addition, it is used in the bridge shell separation type. The whole bridge shell can be pided into left and right, the vertical plane of the two parts, each part is composed of a shell and an outer end of the axle drive pipe. The characteristics of this structure lies in supporting the main gear box manufacturing process is simple, has excellent bearing stiffness.

This design from the design of the car type and use, production conditions, and the mutual adaptation and other components. Finally, design requirements of the automobile drive axle,Establish the three-dimensional entity model, verification. so as to ensure to achieve its performance.

Key words: Low speed truck, Non-disconnect type Transaxle, Driving axle, Design, Modeling, The three-dimensional entity model.    

 目  录

第一章  绪论 1

1.1  研究背景 1

1.2  国内外驱动桥技术的研究与发展 1

1.2.1  国外驱动桥产品发展历程及研究现状 2

1.2.2  驱动桥的技术现状 3

1.2.3  国内的驱动桥技术研究分析 3

1.2.4  国内设计驱动桥的方法 4

    1.2.5  国内的发展趋势 5

1.3  本课题要解决的主要问题和设计总体思路 6

1.4  预期的成果 7

第二章  总体的方案论证 8

第三章  具体设计说明