摘要面对日益严峻的能源、环境与气候变化三大挑战，大力发展新能源汽车，实现交通能源转型，成为实现汽车行业可持续发展的重要途径。发展电动汽车是汽车发展的总体趋势和战略重点，这在国际上已经形成共识。63569

本文对电动汽车用自动变速系统轮系进行了设计和分析，主要工作有：

完成了车辆行驶功率需求分析，再此基础上对驱动电机的参数进行选择，完成了电动客车动力驱动系统的参数匹配。

根据初始动力性能设计参数对传动系速比进行了分析与选择。

根据传动系速比对轮系的齿轮、轴及轴承进行了设计分析和校核。

完成了自动变速系统的二维零件图及装配图，绘制了三维模型图。

毕业论文关键词  电动汽车 电控机械式自动变速器 电机匹配 轮系设计 齿轮校核

毕业设计说明书（论文）外文摘要

Title      The Gear Train Design of Two Gear Drive System     for Electric  Vehicle                                              

Abstract Faced with increasingly severe three major challenges of energy, environment and climate change, developing new energy vehicles to transport energy transformation is becoming an important way to achieve sustainable development of the automotive industry. The development of electric vehicles is the overall trend of vehicle development and strategic priorities, which has formed a consensus in the world.

In this paper, the design and analysis of the gear train of electric passenger cars with automatic transmission system have been finished. The main research works are:

The analysis of the vehicle power demand has been completed , on the basis , the parameters of the drive motor has been selected, the electric bus power drive system parameters matching has been completed.

According to the initial dynamic performance, the design parameters of the transmission speed ratio have been analyzed and choice.

According to the transmission ratio, the gear train of gear, shaft and bearing have been designed ,analyze.

The automatic transmission system of 2D part drawings , assembly drawings and the 3D models have been completed by AutoCAD and CATIA.

Keywords  electric passenger car   automated mechanical transmission of electronically control   motor matching   gear train design   gear check

1  绪论 1

1.1  研究背景 1

1.2  电动汽车国内外发展概况 2

1.3  自动变速器发展现状 3

1.4  轮系结构的特点及设计要求 5

2  两轴式变速器设计方案 5

2.1  主要参数的确定 6

2.2  转矩的确定 8

2.3  传动系传动比选择 8

3  齿轮的设计与校核 11

3.1  中心距的选择 11

3.2 齿轮的设计计算 11

3.3  齿轮主要参数的确定 12

3.4  轮齿弯曲强度计算 17

3.5  轮齿的接触应力 19

4  轴的设计与校核 21