变速器设计说明书-(最新版)

黑龙江工程学院本科生毕业设计Ⅰ摘要目前，许多变速器生产企业正在研发一些燃油经济性更好、换挡性能更高的变速器，以满足市场上的多层次需求。汽车变速器是通过改变传动比、改变发动机曲轴的转矩，适应在起步、加速、行驶以及克服各种道路阻碍等不同行驶条件下对驱动轮牵引力及车速不同要求的需要。变速器是汽车传动系中最重要的部件之一。变速器是用来改变发动机传动到驱动轮上的转矩和转速，在汽车传动系中扮演着至关重要的角色，因此必须重视对变速器的设计研究。传统的变速器零件设计包括了变速器传动布置方案的确定、变速器主要参数的选择、变速器齿轮的设计及校核、变速器轴的设计及校核，由于变速器有较多的零件组成且零件之间的装配关系较复杂因此变速器的设计需要较长的时间和反复的实验。本设计是在传统变速器重要零件设计的基础上运用Pro/E软件进行三维实体模型的创建,可实现变速器的辅助设计，能快速准确的设计出变速器各主要零部件并完成装配。从而可以缩短设计周期，降低开发成本，增加模型可信度，提高产品的质量。关键词：变速器；设计；轴；校核；建模；Pro/E黑龙江工程学院本科生毕业设计IIABSTRACTAtpresent,manymanufacturersaredevelopingsomebettertransmissionfuel,highertransmissionshiftperformancetomeetthemarketdemandformulti-level.AutomotiveTransmissionadaptinthestart,acceleration,roadtraffic,aswellastoovercomeallkindsofdifferentdrivingconditionsimpedeondifferentwheeltractionandspeedrequirementsisbychangingthetransmissionratio,theenginecrankshafttorquechange.Transmissionoftheautomotivepowertrainisoneofthemostimportantcomponents.Transmissionisusedtochangetheenginetothedrivingwheelonthedrivetorqueandrotationalspeed,intheautomotivepowertraintoplayavitalrole,itisnecessarytoattachimportancetothedesignoftransmission.Thetraditionaldesignoftransmissioncomponentsincludingthetransmissionofthedetermineddrivelayout,themainparametersofthechoiceoftransmission,geartransmissiondesignandverification,transmissionshaftdesignandverification,asmoretransmissionpartsandcomponentsbetweenthecompositionofthetherelationshipbetweentheassemblyofmorecomplexdesignthereforerequirealongertransmissiontimeandtheexperimentrepeated.ThedesignisanimportantpartinthetraditionaldesignoftransmissionbasedontheuseofPro/Esoftwaretocreatethree-dimensionalsolidmodel.Anditcandesignafastandaccuratetransmissionofthemajorcomponentsandcompleteassembly.Sothatwecanshortenthedesigncycle,reducedevelopmentcostsandincreasemodelcredibility,improveproductquality.Keywords:Transmission;Design;Axis;Check;Modeling;Pro黑龙江工程学院本科生毕业设计目录摘要.................................................................ⅠAbstract..............................................................Ⅱ第1章绪论...........................................................11.1概述............................................................11.2国内外研究现状..................................................1第2章变速器传动机构布置方案.......................................42.1传动机构布置方案分析............................................42.2传动装置布置方案分析............................................42.3本章小结........................................................5第3章变速器主要参数的选择.........................................63.1挡数的选择及各挡传动比的确定...................................63.3.1确定挡数............................................63.3.2确定主减速比........................................63.3.3确定各挡传动比.....................................63.2中心距........................................................73.3齿轮参数........................................................73.3.1模数的选取.............................................73.3.2压力角................................................83.3.3螺旋角.................................................83.4齿宽计算.......................................................83.5各挡齿轮齿数的分配..............................................93.5.1确定一挡齿轮的齿数......................................93.5.2对中心距进行修正.....................................93.5.3确定常啮合传动齿轮副的齿数..............................93.5.4修正螺旋角的值.......................................103.5.5确定其它各挡的齿数......................................103.5.6确定倒挡的齿数.........................................10黑龙江工程学院本科生毕业设计3.6变速器齿轮的几何尺寸计算.......................................113.6.1直齿圆柱齿轮的几何尺寸计算............................113.6.2斜齿圆柱齿轮的几何尺寸计算.............................123.6.3根据以上公式计算各齿轮参数............................133.7变速器轮齿强度计算.............................................153.7.1齿轮弯曲强度计算.......................................153.7.2齿轮接触应力计算.......................................163.7.3变速器齿轮具体强度校核计算.............................173.8变速器齿轮的材料及热处理.......................................193.9本章小结.......................................................20第4章变速器轴设计计算............................................214.1轴的功用及要求.................................................214.2轴尺寸的初选...................................................214.3轴的结构形状...................................................224.4轴的强度和刚度的计算...........................................224.4.1计算各轴上齿轮的圆周力与切向力.........................224.4.2轴的刚度验算...........................................244.4.3轴的强度验算...........................................304.5本章小结................................................33第5章变速器的同步器设计及其结构元件.............................345.1同步器设计.....................................................345.1.1惯性式同步器...........................................345.1.2同步器工作原理........................................345.1.3主要参数的确定........................................355.2变速器结构元件.................................................375.2.1变速器齿轮............................................375.2.2变速器的轴............................................385.2.3变速器壳体..........................