Automatic Transmission Project for Vehicle ABSTRACT
AT （automatic transmission） is composed of hydraulic torque converter, planetary gears and hydraulic control system components, through the hydraulic transmission and gear combinations through the fluid way to achieve the speed changing and torque changing. Hydraulic torque converter is one of the most important parts of AT, which consists of the pump wheel, turbines wheel and components guide. Besides,it can also transfer the torque and clutch. Automatic transmission has the advantages of easy operation, driving, reduce driver’s fatigue,it has become a direction of modern car’s configuration.
At present ,automatic transmission is popular in china, although AT automatic transmission with hydroulic torque converter will increase fuel consumption by about 10% of vehicles. And it is contrary to the current development trend of energy saving, but AT is the most mature technology as the automatic transmission in the field of transmissions.In the future, AT (automatic transmission) is still have a broad development trends and will have further enhancing of market share .原文请+QQ3249,114辣,文^论,文'网
This article outlines the historical development ,classification, characteristics and basic structure, transmission diagram, working principle and the advantages and disadvantages . According to the requirements for the design of transmission, I complete the transmitting program , the gear ratio design and vehicle dynamic calculations. With the help of transmitting program.I design the Transmission torque converter, planetary line design, clutch, final drive, planetary gear mechanism’s exclusive design and calculation of geometric parameters. Every major sector of the transmission parameters of the design was checked, including the three clutches, two brake, planetary line, reducer, differential and so on. According to the design crafting of each shaft, I complete the strength calculation and lifetime calculations of the shaft and bearings.
Keywords: automobile automatic transmission project
目 录 摘要 Ⅱ毕业论文http://www.751com.cn/
ABSTRACT III
1前言 3
1.1变速技术发展简介 3
1.1.1 MT手动变速器 3
1.1.2 AT自动变速器 4
1.1.3 DCT双离合变速器 5
1.1.4 CVT机械式无级变速器 6
1.2自动变速器的特点综述 8
1.2.1 经济性 8
1.2.2 动力性 8
1.2.3 排放 8
1.2.4 通过性平顺性 8
1.2.5 安全性 9
1.2.6 使用寿命 9
1.3自动变速器的分类 9
1.4 自动变速器 9
1.4.1自动变速器的总体结构 9
1.4.2自动变速器部分结构及工作原理 10
1.4.3 自动变速器的机械变速机构 16
1.5自动变速器在国内外的发展情况 17
2方案论证 21
2.1液力自动变速器的主要结构 21
2.2传动简图 21
2.3工作原理 22
3 传动比的确定和整车动力性计算 26
3.1传动方案最大、最小传动比的确定 26
3.1.1最小传动比的确定 26
3.1.2最大传动比的确定 26
3.2主减速器传动比的确定 27
3.3自动变速器液力变矩器传动比的确定 28
3.4液力变矩器的选择 28
3.5行星车轮机构传动比的选择和设计 32
3.6 整车动力性计算 33
4变速器主要参数的选择和设计 36
4.1 离合器基本参数的确定和计算 36
4.1.1前进离合器基本参数的确定与设计 36
4.1.2制动器基本参数的确定与设计 38
4.2 液力变矩器变速机构基本参数的确定与设计 39
4.2.1液力变矩器有效直径的确定 40
4.3 行星排的确定与设计 41
4.3.1行星排基本参数的确定与设计 41
4.3.2校核齿面接触疲劳强度 45
4.3.3校核齿根弯曲疲劳极限 46
4.4 主减速器基本参数的确定与设计 47
4.5 普通锥齿轮差速器齿轮设计 52
4.5.1差速器齿轮基本参数的确定与设计 52
4.5.2差速器齿轮强度计算 54
5轴和轴承 54
5.1液力变矩器输入轴、输出轴和变速箱轴 54
5.2减速器轴 56
5.3轴承 57
总结 61
附录1 63
附录2 85
参考文献 100
谢辞 101
轿车自动变速器设计1 前言
1.1 变速技术发展简介
汽车变速器是能固定或分档改变输出轴和输入轴传动比的齿轮传动装置，又称变速箱。变速器是汽车的重要组成成员，由于汽油机控制的额定转矩范围很广，需要用齿轮传动来控制驾驶时汽车速度的变化。变速器由传动机构和变速机构组成，可制成单独变速机构或与传动机构合装在同一壳体内。传动机构大多用普通齿轮传动，也有的用行星齿轮传动。2100
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