Abstract

With the development and progress of science and society, all kinds of vehicles will appear on the highway one after another. At the same time, with the passage of time, traffic accidents between electric buses will also become more and more frequent. If the electric bus is not overhauled, the most basic thing is that it seriously affects the appearance of the electric bus, which seriously results in the electric bus being unable to continue to be used. In the past, our country did not attach enough importance to this status quo. That is, there are self-contained overhaul tools on the vehicle, but this brings difficulties to the more difficult maintenance work, such as the chassis of the car, if it breaks down, it can not be overhauled at all, and this status quo exists. With many disharmony factors, the division of the group is aggravated and the degree of social and humanistic care is declining. And if we can often repair the electric bus, it will greatly improve the service life of the electric bus and the beauty of its appearance, and give people a safe and safe driving environment.

This design is about the structure design of the electric bus chassis automatic lifting system. By improving and optimizing the traditional structure of the electric bus chassis automatic lifting system, the mechanical structure and hydraulic system are designed. The structure design of this type of electric bus chassis automatic lifting system is more widely used and more flexible, and it has a certain reference value for the future selection and design work.

Key words: mechanical; hydraulic; electric bus chassis automatic lifting system structure design; control

目 录

摘  要 I

Abstract IV

1 绪论 1

1.1 课题的来源与研究的目的和意义 1

1.2 本课题研究的内容 2

1.3 电动巴士底盘自动升降系统结构设计的发展现状 3

1.4 液压传动的基础知识 3

1.5液压系统的基本组成 4

1.6液压传动优缺点 4

1.7液压传动技术的发展与应用 5

2 电动巴士底盘自动升降系统总体结构的设计 7

2.1 电动巴士底盘自动升降系统结构设计的总体方案图 7

2.2 电动巴士底盘自动升降系统结构设计的总体设计 8

2.2.1 确定检修升降台架参数的原则 8

2.2.2 确定电动巴士底盘自动升降系统结构设计结构参数的内容 8

2.2.3 电动巴士底盘自动升降系统结构设计主要尺寸的确定 8

2.2.4 电动巴士底盘自动升降系统结构设计间距 8

2.3 四连杆机构的设计 9

2.3.1 四连杆机构的设计 9

2.3.2四连杆机构的几何作图法 11

2.4液压缸的选型计算 14

2.4.1缸体壁厚的计算 15

2.4.2缸底厚度的计算 15

2.4.3缸筒发生完全塑性变形的压力计算 16

2.4.4缸筒径向变形计算 16

2.4.5活塞杆强度的计算 16

2.4.5 管路的设计 18

3 负载图和速度图 20

4 各主要零部件强度的校核 22

5 电动巴士底盘自动升降系统结构设计的控制原理 23

结  论 24

致  谢 25

参考文献 26