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东风轻载货车传动系统及主要部件设计论文.doc

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东风轻载货车传动系统及主要部件设计论文.doc

I东风轻载货车传动系统和主要部件设计摘要本文以东风轻载货车为背景,通过对汽车主传动系统各个部件的结构分析,结合货车行驶的实际情况,设计出了一套轻载货车的主传动系统,实现了动力的传递,保证了汽车的驱动。在满足既定开发目标的前提下,借鉴前人的技术成果,从汽车传动系统的总体方案设计开始,首先对传动方案进行整体分析,然后对传动系统的各个部分,包括离合器、变速器、万向传动轴、后驱动桥等进行了结构设计。其中,主要对变速器和后驱动桥做了详细的设计计算,完成了驱动桥单级主减速器及差速器结构三维设计,并对设计中的各主要部件进行了校核计算。关键词汽车主传动系统,离合器,变速器,传动轴,后驱动桥IIDongfenglighttrucktransmissionsystemandmajorcomponentdesignABSTRACTThisfine,dongfenglighttruckofthebackgroundofthemaindrivethroughthevariouspartsofthecarstructure,combiningwiththeactualsituationofgoodsvehicles,designedalighttrucksmaindrive,toachieveapowertransfer,toensurethecardrive.Inmeetingthedevelopmentgoalsestablishedunderthepremise,referenceprevioustechnologicalachievements,theoveralltransmissionsystemfromthecardesignbeganwithanoverallanalysisofthetransmissionscheme,thenallpartsofthetransmissionsystem,includingtheclutch,transmission,universaldriveaxis,afterthedrivebridgesforstructuraldesign.Amongthem,themaintransmissionandreardriveaxleonadetaileddesigncalculations,completedadriveaxlesinglestagemaingearboxanddifferentialstructureofthreedimensionaldesign,anddesignthemaincomponentsofthecheckingcalculation.KEYWORDSAutomotiveMainTransmissionSystem,Clutch,Transmission,Driveshaft,RearDriveAxleI目录第1章绪论........................................................................................................11.1汽车产业的发展和现状.......................................................................11.2国内外轻载货车的发展与趋势...........................................................21.3设计的内容及要求.............................................................................31.4目的及意义.........................................................................................3第2章总体方案................................................................................................52.1驱动形式及参数...................................................................................52.1.1驱动形式....................................................................................52.1.2主要参数....................................................................................52.2发动机的选择.......................................................................................62.2.1发动机形式的选择....................................................................62.2.2发动机主要性能指标的选择....................................................62.2.3所选发动机的型号及主要性能参数........................................72.3传动系统的布置...................................................................................7第3章离合器的设计......................................................................................93.1离合器的概述.......................................................................................93.2离合器采用的形式及其主要参数.....................................................103.2.1采用的形式..............................................................................103.2.2主要参数选择..........................................................................113.3离合器的结构设计.............................................................................113.3.1从动盘总成..............................................................................113.3.2压盘和离合器盖......................................................................123.4小结.....................................................................................................13第4章机械式变速器设计............................................................................14II4.1变速器概述..........................................................................................144.2传动方案.............................................................................................154.3零部件结构设计.................................................................................164.3.1主要参数..................................................................................164.3.2各个档位的传动比及初选中心距..........................................174.3.3齿轮参数..................................................................................184.4各档齿轮齿数的分配.........................................................................194.4.1确定1档齿轮的齿数...............................................................194.4.2对中心距的修正.......................................................................194.4.3确定常啮合齿轮副的齿数.......................................................194.4.4确定其他各档齿数..................................................................204.4.5确定倒档齿轮齿数及中心距。..............................................224.5各齿轮及轴的校核.............................................................................234.5.1变速器齿轮强度计算..............................................................234.5.2轴的强度计算..........................................................................264.6小结.....................................................................................................30第5章传动轴的设计....................................................................................315.1传动轴的概述.....................................................................................315.2传动轴形式的选择.............................................................................315.2.1传动轴的总体设计..................................................................315.2.2万向节的设计..........................................................................335.3传动轴的校核.....................................................................................345.4小结.....................................................................................................35第6章整体式单级主减速驱动桥设计........................................................366.1驱动桥的概述.....................................................................................366.1.1主减速器的概述......................................................................366.1.2差速器的概述..........................................................................38

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