论文摘要：运动型多功能乘用车（SUV）为四轮驱动，兼具城市行走、野外运动，除了要具备中高档轿车的舒适性外，还要有更高的越野性和安全性。本设计对象是运动型多功能乘用车（SUV）后桥。
本设计完成了SUV后桥中主减速器的设计，差速器的设计，半轴的设计。本文根据SUV后桥的要求，通过选型，确定了主减速器传动副类型，差速器类型，驱动桥半轴支承类型。通过计算计算，确定了主减速比，主、从动锥齿轮、差速器、半轴以及桥壳的主要参数和结构尺寸。其中的一部分计算采用自编的计算机程序完成，有效的减少了计算时间，提高了效率。最后利用Pro/E软件对锥齿轮进行了三维建模。
通过主要零部件的校核计算和对主要零部件二维绘图，可以确定所设计的能够满足设计要求。
ABSTRACT
Sport utility passenger vehicle (SUV) for the four-wheel drive, both cities run, field sports, in addition to the premium sedan with the comfort, we must also have a higher cross-country and safety. The object that is designed for sport utility passenger vehicles (SUV) is rear axle.
The design of rear axle includes the design of the main reducer , the design of the differential device and rear axle design. According to the requirements of the rear axle,i can identify the main types of main gear box, differential device, rear axle.And by calculating, i can identify the main reduction ratio, the main, driven helical bevel gear , differential device and the shell of the main parameters of the bridge structure and size. One part of the calculation using the computer program to complete the self, reducing computing time and improve efficiency. Finally,i use Pro / E software to make the bevel gear ，the three-dimensional modeling
Checking through the major components of the calculation of the main components and two-dimensional drawings, to determine the design to meet the design requirements
KEY WORDS: four drives vehicle, rear axle
目录
TOC \o "1-3" \h \z \u 1 概 述. 5
2 整体式单极主减速器设计. 7
2.1 主减速器结构方案分析. 7
2.1.1螺旋锥齿轮传动. 7
2.1.2双曲面齿轮传动. 7
2.2 主减速器主、从动锥齿轮的支承方案选择. 10
2.2.1主动锥齿轮的支承. 10
2.2.2从动锥齿轮的支承. 12
2.3 主减速器的基本参数选择和设计计算. 12
2.3.1主减速比的确定. 12
2.3.2主减速器齿轮计算载荷确定. 14
2.3.3主减速器锥齿轮基本参数的选择. 16
2.3.4主减速器主动锥齿轮几何尺寸的计算. 21
2.3.5“格里森”制主减速器锥齿轮强度计算. 22
2.3.6 锥齿轮的材料选择. 26
3 对称锥齿轮式差速器设计. PAGEREF _Toc170785393 \h 28
3.1 差速器齿轮主要参数选择. PAGEREF _Toc170785394 \h 28
3.2 差速器齿轮的几何尺寸计算. PAGEREF _Toc170785395 \h 29
3.3 差速器齿轮强度计算. 29
4 半轴设计计算. 33
4.1 结构形式分析. 33
4.2 半轴计算. 33
4.3 半轴花键计算. 35
5 驱动桥壳设计. 37
6 三维造型设计. 39
致 谢. 44
参考文献. 45
附件. 46
