东风EQ1090E型载货汽车驱动桥部分毕业设计.doc

东风EQ1090E型载货汽车驱动桥部分毕业设计 摘 要 本次设计为EQ1090载货汽车驱动桥设计。汽车驱动桥作为汽车传动系中一重要组成部分，它设置在传动系的末端，由主减速器、差速器、半轴和桥壳等组成。它将经万向传动装置传来的发动机转矩通过主减速器、差速器、半轴等传到驱动车轮。它通过主减速器的主、从动齿轮之间的配合，改变由传动轴传到主动齿轮上的转速，使之在工作中实现增大转矩、降低转速，改变转矩的传递方向。 本说明书中，根据给定的参数，首先对主减速器进行设计。主要是对主减速器的结构，以及几何尺寸进行了设计。主减速器的形式主要有单级主减速器和双级主减速器。本次设计采用的是双级主减速器，第一级采用一对螺旋锥齿轮，第二级采用一对斜齿圆柱齿轮。其次,对差速器的形式进行选择，并对差速器齿轮的几何尺寸进行了设计和计算。之后，对半轴的尺寸、支承形式，以及桥壳的形式和特点进行了分析设计。接着，对齿轮的强度进行了校核。最后对二级主减速器、差速器总成、半轴、轮胎做了三维模型，将它们装配起来，以分析设计与布置的合理性，并通过PRO/E对装配体进行运动仿真来了解运动速度情况。 采用非断开式驱动桥具有结构简单，加工工艺性好，制造容易，拆装，调整方便，工作可靠等优点。采用双级主减速器，保证要求的离地间隙和预定的传动比。采用普通锥齿轮差速器，结构简单、工作平稳、制造方便。 关键词:驱动桥；主减速器；差速器；半轴；齿轮 Abstract This design of EQ1090’s medium truck drive axle is introduced in the graduation. As one of the major parts in the automobile transmission, the drive axle locates at the end of the transmission, which consists of main reducer, differential, half axle and drive axle case. Drive axle can pass the engine torque which is brought from universal joint to the drive wheel through main reducer, differential, half axle. The speed of the main drive gear is changed with the help of the cooperation of the main drive gear and driven gear. It can decelerate, increase the torque and change its transmitting direction in the process[1]. The main reducer is designed in this paper firstly accounting to the given parameters. Single and double reducers are the two major types of main reducer. The double-level main reducer is used in my article. The first level reduction uses one pair of spiral bevel gears. The second level reduction uses a pair of helical-spur gears. Secondly, the main form of differential are General symmetric cone planetary gear differential and Non-slip differential. The