WG7202四驱中级轿车变速器设计(含CAD零件图装配图,CATIA三维图)(任务书,开题报告,文献摘要,外文翻译,论文说明书20000字,CAD图7张,CATIA三维图)
摘 要
本次设计以本田CR-V为参考车型。在给定发动机最大转速和最大转矩的条件下，设计出满足最高车速和最大爬坡度要求的变速器。本次设计重点对变速器各挡传动比，齿轮的参数、轴的结构尺寸，轴承型号等进行了选择和设计，并对这些零件进行了反复的校核、验算和修改，对变速器的传动方案和结构形式分别进行比较分析和选型，同时兼顾操纵机构和同步器的结构选型和设计，使所设计的变速器的性能更加优异。本次设计计算公式均采用matlab编程计算，提高了计算的准确度和效率，并通过ansys对两轴和齿轮的结构强度进行有限元分析，进一步验算计算结果，改进零件结构，保证零件的可靠性达到要求，设计出符合性能要求的两轴式五挡变速器。
关键词：变速器；操纵机构；同步器；有限元分析
Abstract
This design is based on Honda CR-V. Under the condition of the maximum engine speed and the maximum torque, the transmission is designed to meet the maximum speed and maximum climbing requirements. This design focuses on theselection of transmission gear ratio, the gear parameters, the size of the shaft structure, bearing models were selected and designed, and these parts were repeatedly checked and modified.The transmission scheme and structure of the transmission are compared and analyzed separately, taking the structure selection and design of the operating mechanism and the synchronization into account ,so that the performance of the designed transmission is more excellent.In order to improve the accuracy and efficiency of the calculation,the design calculation formulasare wrote on matlab programming.ThenANSYSis used to analyze the two shafts and gears structural strength by the finite element, the purpose of which is to verify the calculation resultsfurther,then improve the structure of parts to ensure that the reliability of parts meet the requirements.So that the two-axis five-speed transmission which meets the performance requirements is finally designed.
Keywords:transmission; control mechanism; synchronization; finite element analysis
目 录
第1章 绪论 1
1.1 概述 1
1.1.1 国内外汽车变速器的发展现状 1
1.1.2 汽车变速器的设计目标和要求 2
1.2 设计的内容及步骤 2
第2章 传动机构布置方案选择 4
2.1 传动方案选择 4
2.2 倒挡布置方案选择 4
2.3 零部件结构方案选择 5
第3章 变速器的设计与校核 7
3.1 变速器的主要参数的选择 7
3.1.1 挡数 7
3.1.2 变速比的范围 7
3.1.3 变速器各挡传动比的确定 8
3.1.4 中心矩的选择 9
3.1.5 外形尺寸 10
3.1.6 齿轮参数的选择 10
3.1.7 各挡齿轮齿数分配 12
3.1.8 总结各挡传动比和齿轮齿数 17
3.2 变速器齿轮强度校核 17
3.2.1 齿轮材料的选用原则 17
3.2.2 变速器齿轮弯曲疲劳强度校核 18
3.2.3 齿轮接触疲劳强度校核 22
3.3 轴的设计 26
3.3.1 初选轴的直径 27
3.3.2 轴的设计计算 27
3.3.3 轴的刚度计算 28
3.4 轴承的计算 39
3.4.1 轴承的选择与寿命计算 40
第4章 其他结构部件 44
4.1 操纵机构 44
4.2 同步器设计 44
4.2.1 同步器选型 44
4.2.2 同步器主要参数确定 44
4.3 变速器壳体 45
第5章 有限元分析 47
结论 50
参考文献 51
附录 52
致谢 62
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