SUV乘用车驱动桥设计

SUV乘用车驱动桥设计

The Design of Drive Axle for

SUV Passenger Car

摘要

驱动桥的基本功用是将传动轴或变速器传来的转矩增大并适当降低转速后分配给左、右驱动车轮，其次驱动桥要承受路面和车架或车身之间的垂直力、纵向力和横向力，以及制动力和反作用力矩等。转向驱动桥在驱动桥的基础上增添了转向的功能，使汽车按照驾驶员的要求行驶。转向驱动桥的组成包括主减速器、差速器、半轴、等速万向节和驱动桥壳。驱动桥是汽车传动系中主要总成之一。驱动桥的设计是否合理直接关系到汽车使用性能的好坏，驱动桥是汽车中的重要部件，它承受着来自路面和悬架之间的一切力和力矩，是汽车中工作条件最恶劣的总成之一，如果设计不当会造成严重的后果。

本设计主要内容包括转向驱动桥各部件的设计、计算和校核，并且绘制了转向驱动桥的装配图，主减速器的从动齿轮、半轴齿轮和万向节等主要部件的零件图。

关键词：驱动桥，主减速器，差速器，车轮传动装置，驱动桥壳

Abstract

The basic function of the Drive Axle is increasing torque which is from drive shaft or transmission and reducing the speed ,then drive it to the left and right driving wheel; secondly Drive Axle still withstand the vertical force ,longitudinal force and transverse force between the road and bridge or the body frame ,and braking force , reaction torque ,etc. Steering Drive Axle adds the function of shift under the basic of the Drive Axle, so that the car can run according to the driver. Steering Drive Axle include the main drive component, Differential, Half Axel, universal, Drive Axle Housing, etc. Drive Axle is one of the main assemble of the automotive power train. Whether the design of the Drive Axle is reasonable or not, affect the use of the cars. Drive Axle is the important part of the cars, it withstands the all force and torque between the road and the suspension and its working condition is the worst in cars. If the design is not right it will cause serious consequences.

This article mainly includes the various parts of the Steering Drive Axle’s design, computation and examination, While the use of CAD software to map out the Steering Drive Axle assembly drawing, the driven gear of the main gear box, gear half shaft, outer axle’s parts diagram, and make their drawings. CAD as a computer-aided design of high-end software, with its powerful assembly management, functional simulation, manufacturing, data management, and is widely used to make parts of the assembly to meet the requirements.

Key words: Drive Axle ,Main gear box ,Differential ,Half Axel ,Drive Axle Shell

目录

摘要................................................................ III Abstract .............................................................. IV 1 绪论 (1)

1.1 前言 (1)

1.2 国内外发展状况 (2)

1.3 本设计的主要内容 (3)

2 转向驱动桥的选型.................................... 错误!未定义书签。

2.1 整车设计基本参数 (4)

2.2 转向驱动桥的选型 (4)

3 主减速器的设计 (8)

3.1 主减速器功用及设计要求 (8)

3.2 主减速器斜齿圆柱齿轮设计 (10)

4 差速器的设计 (17)

4.1 差速器结构形式选择 (17)

4.2 普通锥齿轮式差速器齿轮设计 (17)

4.3 普通锥齿轮式差速器齿轮强度计算及材料选择 (20)

5 车轮传动装置设计 (22)

5.1 半轴的结构形式.................................. 错误!未定义书签。

5.2 万向节的选择与计算.............................. 错误!未定义书签。

6 驱动桥壳设计 (26)

结论 (27)

致谢 (28)

参考文献 (29)