皮卡车变速器设计

西南林业大学本科毕业（设计）论文（2012届）题目皮卡车变速器设计教学院系机械与交通学院专业车辆工程学生姓名吴成国指导教师李玉云（副教授）评阅人2012年06月05日皮卡车变速器设计吴成国（西南林业大学车辆工程专业2006级，云南昆明，650224）摘要：本课题是取材于汽车中比较实用的皮卡车，皮卡，是一种用轿车车头和驾驶室，同时带有敞开式货车车厢的车型，他的特点是既有轿车般的舒适性，又有货车的载货和优越性能，动力好，是一种集轿车，货车优点于一身的车型。在装量配备上采用较高品质的零部件，性能不亚于中档轿车，可谓是下乡不娇，进城不土。本课题主要是根据长城风骏皮卡车车型来选定它的参数，再根据选定的参数来设计皮卡车的变速器，通过对这种变速器的的组合布置形式的分析和相关计算校核，使其能达到皮卡车对变速器的性能要求，包括各档位组合方式的分析和计算，传动比的选择，齿轮参数的选择，轴的选择计算，轴承的选择等。关键词：组合式变速器；中间轴；锁环式同步器；齿轮；传动比DesignOfThePickupTruckGearboxWuChengguo(SouthwestForestryUniversityvehicleengineeringYunnanKunming650224)Abstract:Thispaperisbasedonthecarmorepracticalpickup,pickup,acarheadandcab,atthesametimewiththeopentruckcompartmentmodels,hischaractersarebothcar-likecomfort,andtruckcargoandsuperiorperformance,power,isasetofcars,onthemeritsofatruckvehicle.Inchargewiththehighqualitycomponents,theperformanceisnotinferiortomid-rangecars,itisnotagotothecountryside,townwithoutsoil.ThissubjectismainlyaccordingtothetheGreatWallfanChunpickupcarmodelstoselectitsparameter,thenaccordingtotheselectedparameterstodesignthepickuptruck'stransmission,thetransmissionofthecombinedarrangementformsofanalysisandcalculation,whichcanachievethepickuptruckontransmissionperformancerequirements,includingthefileacombinationofanalysisandcalculation,thechoiceofgeartransmissionratio,parameterselection,theselectionandcalculationoftheshaft,bearingselection.Keywords:CombinedTransmissionShaftThelockringsynchronizergearTransmissionratio目录第一章绪论.........................................................................................................................11.1概述...........................................................................................................................11.1.2国内外研究状况与变速器的发展趋势..........................................................11.1.1变速器的基本要求：.....................................................................................21.2变速器的类型..........................................................................................................2第二章变速器结构方案的确定.........................................................................................42.1变速器传动形式的选择...........................................................................................52.1.1两轴式变速器..................................................................................................52.1.2三轴式变速器..................................................................................................52.2变速器传动机构布置方案.......................................................................................62.3多档变速器的组合方案...........................................................................................62.3.1倍档组合式机械变速器.................................................................................62.3.2半档组合式变速器..........................................................................................72.3.3组合式多档变速器传动比的搭配方式..........................................................72.4倒档传动方案...........................................................................................................82.5变速器主要零件结构的方案分析...........................................................................92.5.1齿轮型式.........................................................................................................92.5.2换档结构形式.................................................................................................92.5.3变速器轴承的选择.....................................................................................10第三章变速器主要参数选择和校核...............................................................................113.1挡数的选择............................................................................................................113.2传动比的确定........................................................................................................123.2.1最低档传动比计算.......................................................................................123.2.2其他各挡传动比初选...................................................................................133.3中心距A的确定...................................................................................................133.4外形尺寸的初选....................................................................................................143.5变速器各齿轮基本参数的选择............................................................................143.5.1组合式变速器齿轮的设计准则...................................................................143.5.2模数...............................................................................................................143.5.3压力角α.......................................................................................................153.5.4螺旋角β.......................................................................................................163.5.5尺宽b............................................................................................................173.6各挡齿轮齿数的分配............................................................................................173.6.1确定一档齿轮的齿数............................................