ABSTRACT
 
Auto transmission is the main auto transmission system, the structure performance gear mechanisms for car dynamic performance, fuel performance, reliability and shift anipulated portability, transmission and steadiness and efficiency are having an impact. Through the research to start, climbing a car in turning, accelerate, such as in the running mode,transmission shift transmission changes each part of the design, make the engine at the most favorable conditions range work.
This design according to the given its main technical indices, choose EQ1092 type of dongfeng automobile as improved to archetype, through the literature and standard, restore the vehicle transmission design process.
This manual transmission transmission's first to analyze layout, this paper expounds the design idea of driving mechanism analyzed the choosing principle, shift agencies mainly introduced the reverse gear arranging scheme.
Then, the calculation of the mechanical transmission main parameters, in does not affect the steady working state by reducing the volume and quality, transmission with type structure design USES the same size, aims to improve workability and economy.
Finally, choose the type and synchronizer designed for operators. According to the specific requirements of the gearbox, structural features, and other comprehensive consideration, using simple and feasible design methods, effectively improve the transmission shifting ability, make designed can meet vehicle transmission of high performance and fuel economy of high requirements.

 
Keywords:Transmission;Bachelor’s Degree;Oart; Triaxial five block; Mechanical; Design
  
目  录
 
摘要......................................................................Ⅰ
Abstract....................................................................Ⅱ
第1章 绪论..............................................................1
1.1概述选题的背景目的及意义............................................1
1.2 国内外研究状况.....................................................1
  　1.3 选题的研究设想研究方法.............................................2
  　1.4 设计的主要内容.....................................................2
  　1.5 预期结果和意义.....................................................3
第2章 总体方案设计.....................................................4
2.1 任务书给定的参数...................................................4
  　2.2 设计应满足的基本要求...............................................4
2.3 变速器的类型选择...................................................5
  　2.4 变速器传动机构的分析...............................................5
2.4.1 换档机构的选择 ...............................................5
2.4.2倒档布置方案 ..................................................6
2.5 设计方案...........................................................7
2.6 本章小结...........................................................7
第3章 变速器设计计算...................................................8
　　3.1轴的直径............................................................8
　　3.2 传动比范围.........................................................8
　　3.3 变速器轴承.........................................................9
　　3.4 中心距............................................................10  
    3.5 外形尺寸..........................................................10
3.6 齿轮参数..........................................................11
3.6.1 模数的选取...................................................11
3.6.2 压力角....................................................11
3.6.3 螺旋角.......................................................11
3.6.4 齿宽.....................................................12
3.7 各挡齿轮齿数的分配..............................................12
3.7.1 确定一挡齿轮的齿数 ......................................13
3.7.2 对中心距进行修正 ........................................13
3.7.3 确定常啮合传动齿轮副的齿数 ..............................15
3.7.4 确定其他各挡的齿数 ......................................17
3.7.5 确定倒挡直齿齿轮齿数 ....................................22
3.8本章小结.........................................................23
第4章 齿轮的校核....................................................24
4.1 齿轮的损坏形式..................................................24
4.2计算各轴的转矩...................................................24
4.3 齿轮强度计算....................................................25
4.3.1 倒档直齿轮弯曲应力........................................25
4.3.2 斜齿轮弯曲应力............................................26
4.3.3 轮齿接触应力..............................................27
4.4 本章小结........................................................30
第5章 变速器轴和轴承的设计计算....................................31
5.1初选变速器轴的轴长...............................................31
5.2 轴的结构设计....................................................31
5.3 变速器轴的强度计算..............................................32
5.3.1齿轮和轴上的受力计........................................32
5.3.2 轴的强度计算..............................................32
5.3.3 轴的刚度计算..............................................37
5.4 变速器轴承的选择和校核..........................................40
5.4.1 第一轴轴承的选择和校核....................................40
5.4.2 第二轴轴承的选择和校核....................................42
5.4.3 中间轴轴承的选择和校核....................................42
5.5 本章小结........................................................42
第6章 同步器和操纵机构的选择 ......................................43
6.1 锁销式同步器....................................................43
6.1.1 锁销式同步器结构..........................................43
6.1.2 锁销式同步器工作原理......................................44
 
6.2 锁环式同步器.......................................................44
6.2.1 锁环式同步器结构.........................................44
6.2.2 锁环式同步器工作原理.....................................45
6.2.3 锁环式同步器主要尺寸的确定...............................46
6.3 变速器操纵机构.................................................47
6.3.1 直接操纵手动换挡变速器...................................48
6.3.2 远距离操纵手动换挡变速器.................................48
6.4 本章小结.......................................................48
结论..................................................................49
致谢..................................................................50
参考文献..............................................................51

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