庆铃五十铃皮卡后驱动桥设计-毕业设计说明书.docx

word文档可编辑 word文档可编辑 庆铃五十铃皮卡后驱动桥设计 摘 要 驱动桥在汽车中起着非常重要的作用，其基本功能是增大由发动机传至驱动轮的转矩，且能够使左、右驱动车轮具有汽车行驶运动学所要求的差速功能；同时，驱动桥还具有承受汽车车身在行驶中产生的附加竖直方向的力、前后方向的力、和左右方向的力及所产生力矩的作用。根据现有汽车驱动桥的型式，本设计采用了非断开式驱动桥。 本文对五十铃皮卡后驱动桥采用传统设计，再进行优化。先是对主减速器进行基本参数、型式的计算与选择，并对其进行了强度校核；选择了圆弧齿双曲面齿轮，并对其进行了具体的几何尺寸计算及偏移、螺旋方向的选择；选择了对称式圆锥行星齿轮差速器，并严格按照汽车差速器直齿锥齿轮的几何尺寸计算用表进行尺寸计算与型式选择；在半轴设计中，本文选择了全浮式半轴，并进行了基本尺寸的计算与强度、寿命的校核；在驱动桥桥壳的设计中本文对桥壳进行了CATIA的三维建模与有限元分析，这样更能反映桥壳上应力分布及其变形的真实情况，这是传统计算方法难以办到的，有限元分析将会成为汽车设计主流方法。 关键词：驱动桥；主减速器；差速器；CATIA；有限元分析 Abstract The driving axle plays an indispensable role in the car, its basic function is to increase the torque, so that the left and right drive wheels with car driving kinetic requirements of the differential function; the same time, the drive axle also has to bear the vertical force, Longitudinal force and transverse force and its torque. According to the existing type of car drive axle, choose a non-disconnected drive axle. This paper uses the traditional design and then optimizes the driving bellows of Isuzu. First, the design and calculation of the main reducer, the choice of circular arc tooth surface, and its more detailed geometric size calculation; The design of the choice of symmetrical cone planetary gear differential, and in strict accordance with the car differential straight. The design of the geometric dimension of the bevel gear is calculated and calculated. In the design of the half-shaft, the full-floating axle is selected and the design calculation and the strength are checked. In the design of the bridge. The shell has carried on the three-dimensional modeling and the finite element analysis of CATIA, which can reflect the stress and its distribution in the bridge shell, which is difficult to do with the traditional calculation method. Key words: drive axle; main decelerator; differential; CATIA; finite element analysis 目 录 摘 要 I Abstract II 第1章 绪论 1 1.1 课题的目的和意义 1 1.2 课题背景 1 1.3 研究内容 2 1.4 本章小结 2 第2章 主减速器的设计计算 3 2.1 汽车技术参数 3 2.2 主减速器的结构型式