1吨载货汽车驱动桥设计

摘要

驱动桥作为汽车四大总成之一，它的性能的好坏直接影响着整车的性能，而对于载重汽车显得的尤为重要。当采用大功率发动机输出大的转矩以满足载重汽车的快速、重载的高效率、高效益的需要时，必须要搭配一个高效、可靠的驱动桥，所以采用传动效率高的单级减速驱动桥已成为未来载重汽车的发展方向。本课题参照驱动桥的设计方法进行了农用运输车汽车驱动桥的设计。我的课题是1吨农用汽车底盘驱动桥的设计，我首先确定主要部件的结构形式和主要设计参数，然后参考类似驱动桥的结构。确定出总体设计方案，最后对主、从动锥齿轮，差速器圆锥行星齿轮，半轴齿轮，全浮式半轴和整体式桥壳的强度进行校核以及对支承轴承进行了寿命校核。

本设计根据1t货车的载货性能，行驶范围广的特点，要求驱动桥在保证日常使用基本要求的同时极力强调其对恶劣路况的适应力。根据1t货车的载货性能，行驶范围广的特点，要求驱动桥在保证日常使用基本要求的同时极力强调其对恶劣路况的适应力。我的设计不是采用传统的双曲面锥齿轮作为载重汽车的主减速器而是采用的直齿锥齿轮，这样会得到满意的效果。

关键字：农用运输车；驱动桥；单级减速器；直齿锥齿轮；差速器

Abstract

Drive a car, one of four assembly, it will have a direct impact on the performance of the vehicle performance, and for heavy trucks appear particularly important. When the power output of the big engine torque output large torque to meet the rapid trucks overloaded, high efficiency, high benefit when need, must want to match a more efficient and reliable driving axle, and use of high transmission efficiency of the single stage slow driving axle has become the future development direction of heavy trucks. This topic reference the design procedures of driving axle load truck driving axle design. I issue is a ton of agricultural automobile chassis driving axle design, I first make sure of the main parts of the form and structure of main design parameters, the structure of the drive and reference similar. Determine the overall design scheme, then to the Lord, driven the bevel gear and differential planetary gear cone, half axle gear, all serving the half shaft and integral bridge the strength of the shell and check out of supporting bearing life on the check.

This set this design according to 1 t truck unloaded the performance, the characteristics of the driving range, the requirement in the day-to-day use drive basic requirements and at the same time to emphasize its resilience to bad road conditions. According to the plan of the van 1 t manifest performance, the characteristics of the driving range, the requirement in the

day-to-day use drive basic requirements and at the same time to emphasize its resilience to bad road conditions. My design is not the use of the traditional of the hypoid gear load truck as the main reducer of instead spur bevel gear, we will be satisfied with the result.

Key word: trucks; Driving axle; Single grade reducer; Spur bevel gear; differential

目录

第一章绪论........................................... - 5 -

1.1.汽车底盘概述 ............................................................................................................................ - 5 - 1.1.1传动系：.................................................................................................................... - 5 -1.1.2．行驶系.................................................................................................................... - 5 -1.1.3转向系：................................................................................................................... - 6 -1.1.4制动系：..................................................................................................................... - 6 -

1.2.驱动桥详解 ............................................................................................................................... - 6 -1.2.1功能：....................................................................................................................... - 6 -1.2.2驱动桥的设计要求：............................................................................................... - 7 -1.2.3驱动桥的分类............................................................................................................ - 7 -第二章结构形式选择.................................. - 14 -

2.1基本参数选择 ........................................................................................................................... - 14 - 第三章主减速器设计.................................. - 17 -

3.1结构形式 ................................................................................................................................. - 17 -

3.2齿轮计算 ................................................................................................................................. - 18 -3.2.1主减速器齿轮的材料及热处理............................................................................... - 18 -3.2.2主减速比i0的确定................................................................................................ - 19 -3.2.3 主减速器锥齿轮的主要参数选择.......................................................................... - 21 -3.2.4 主减速器锥齿轮的材料.......................................................................................... - 22 -3.3.1 单位齿长圆周力计算.............................................................................................. - 23 -3.3.2 齿轮弯曲强度计算................................................................................................. - 23 -3.3.3 轮齿接触强度计算................................................................................................. - 24 -

3.4 主减速器锥齿轮轴承的设计计算 .......................................................................................... - 25 - 3.

4.1 锥齿轮齿面上的作用力.......................................................................................... - 25 -3.4.2 锥齿轮轴承的载荷.................................................................................................. - 26 -3.4.3 锥齿轮轴承型号的确定.......................................................................................... - 28 -第四章差速器设计.................................... - 30 -

4.1 差速器结构形式选择 .............................................................................................................. - 30 -

4.2 普通锥齿轮式差速器齿轮设计 .............................................................................................. - 31 -

4.3 差速器齿轮的材料 .................................................................................................................. - 33 -

4.4 普通锥齿轮式差速器齿轮强度计算 ...................................................................................... - 33 -