纯电动四驱乘用车变速器设计（含三维图CATIA+CAD图纸+说明书）

本文结合纯电动车发展现状与现有变速器结构类型特点，结合纯电动车特点对变速器的主体部分进行设计计算，并对其关键零件如轴体，齿轮等进行校核计算，确保变速器的设计满足相应要求。并利用ANSYS进行了一档行驶时齿面接触应力的静力学分析，验证计算准确性，研究其在啮合过程中应力变化规律，并对输入轴进行了自由状态下与约束状态下的模态分析，在确保不会因变速器齿轮啮合而产生共振的基础上，对两者的差异与共同点进行了比较分析，对轴类零件的模态分析有一定的参考意义。

关键词：纯电动汽车；变速器；静力学分析；模态分析

Abstract
Full electric vehicles is relatively common fuel cars cleaner the advantages of high efficiency, make its gradually replace traditional fuel cars, but currently on the market most of the pure electric vehicles using is a single stage reducer, is not equipped with the transmission, in the transmission ratio is limited by a certain choice, should not only consider the highest speed, and acceleration time and give attention to two or morethings gradability, make its power performance and energy efficiency in a certain degree of reduced. Therefore, it is very necessary to improve the power performance of pure electric vehicles and the energy utilization rate under the corresponding working conditions by using transmission in the pure electric vehicles, so as to improve the power performance of electric vehicles, the range of driving range, and appropriately reduce the cost of electric motors and batteries.
In this paper, the development status of pure electric vehicle and the characteristics of the existing transmission structure type, combined with the characteristics of pure electric vehicle to the transmission of the main part of the design and calculation, and its key parts such as shaft, gear check calculation, to ensure that the transmission design to meet the corresponding requirements. And a driving is studied by using ANSYS, statics analysis of tooth surface contact stress, the numerical accuracy, and to study the stress variation law in the process of meshing, and input shaft of a free state of modal analysis and constraint conditions, to ensure will not produce resonance by transmission gear mesh, on the basis of the analysis compares the differences and similarities in both, the modal analysis of the shaft parts have certain reference significance

Key Words:Full electric vehicle; Transmission; Statics analysis ; Modal analysis

目录
摘要I
Abstract II
第1章绪论1
1.1研究的背景及意义1
1.1.1研究的背景1
1.1.2研究的意义1
1.2国内外研究现状2
1.3设计的主要内容3
第2章车辆参数与变速器结构的选取5
2.1车辆基本参数的选取5
2.2设计要求的选取5
2.3动力性参数的选取6
2.3.1电动汽车用电动机特点与要求6
2.3.2动力性参数的选取7
2.4变速器种类与结构选取7
2.4.1变速器种类选取7
2.4.2变速器结构选取8
2.5变速器主要参数选取8
2.5.1传动比的选取8
2.5.2初选中心距A 8
2.5.3变速器尺寸的预估9
2.6纯电动汽车动力性参数的校核9
2.6.1有关最高车速的动力性参数校核9
2.6.2有关爬坡的动力性参数校核9
2.6.3有关起步的动力性参数校核10
2.7本章总结10
第3章变速器主要零部件设计与校核11
3.1齿轮的参数选取与计算11
3.1.1齿轮参数的选取11
3.1.2一档齿轮的设计11
3.1.3二档齿轮的设计13
3.1.4齿轮材料与热处理的选取14
3.2齿轮的校核计算14
3.2.1各轴转矩计算14
3.2.2各档齿轮齿根弯曲疲劳强度校核14
3.2.3各档齿轮接触疲劳应力的校核16
3.3轴的设计计算与校核17
3.3.1轴结构初选17
3.3.2轴的尺寸初选18
3.3.3轴的刚度计算18
3.3.4输入轴的强度校核计算20
3.3.5输出轴的强度校核计算22
3.3.6轴相关校核汇总23
3.4轴承的选用与校核23
3.4.1输入轴轴端支承轴承的选用与校核23
3.4.2输出轴轴端支承轴承的选用与校核24
3.4.3输出轴滚针轴承的选取与校核计算25
3.5键的设计计算25
3.5.1输出轴与花键毂连接处的键的设计与校核25
3.5.2输入轴与输出轴联轴器部分矩形花键的选取与校核26
3.5.3输入轴与齿轮Z3连接处键的选取与校核26
3.5.4结合套与结合齿圈连接处花键选取与校核27
3.6同步器的选取与计算27
3.6.1同步器工作原理27
3.6.2锥面半锥角以及工作锥面间的摩擦系数的选取27
3.6.3同步环摩擦锥面螺纹槽的选取28
3.6.4摩擦锥面平均半径R与摩擦锥面工作长度b的选取28
3.6.5锁止角的选取29
3.7操纵机构的选取29
3.7.1选档换挡机构29
3.7.2操纵机构安全装置选择30
3.8本章总结30
第4章有限元分析31
4.1一档齿轮啮合时接触应力分析31
4.2输入轴模态分析34
4.3有限元分析结论37
结论39
参考文献40
致谢41
附录A 42
附A1齿轮参数计算源程序42
附A2程序运行结果43
附录B 44
附B1齿轮接触应力计算源程序44
附B2程序运行结果44

花键毂建模

Z2齿轮A3

变速器装配图A0

花键毂A3

输出轴A2

输入轴A2

轴承盖A2