PAGEIV摘要驱动桥作为汽车的重要组成部分，它的性能的好坏直接影响整车性能。其一般由主减速器、差速器、半轴及桥壳四部分组成，基本功用是增大由传动轴或直接由变速器传来的转矩，将转矩分配给左、右车轮，并使左、右驱动车轮具有汽车行驶运动学所要求的差速功能；此外，还要承受作用于路面和车架或车厢之间的铅垂力、纵向力和横向力。此次设计先论述了驱动桥的总体结构，在分析驱动桥各部分结构型式、发展过程及其以往形式的优缺点的基础上，确定了总体设计方案：采用整体式驱动桥，主减速器的减速型式采用双级减速器，主减速器齿轮采用螺旋锥齿轮，差速器采用圆锥行星齿轮差速器，半轴采用全浮式型式，桥壳采用铸造整体式桥壳。此次设计中，主要完成了双级减速器、圆锥行星齿轮差速器、全浮式半轴的设计和桥壳的校核及材料选取等工作。关键字：驱动桥、双级主减速器、弧齿锥齿轮、ABSTRACTDrivingaxleassemblyisoneoftheimportantvehiclecarryingpiecesandcandirectlyimpactonthewholevehicle'sperformanceanditseffectivelife.DrivingAxleisconsistedofMainDecelerator,DifferentialMechanism,HalfShaftandAxleHousing.ThebasicfunctionofDrivingAxleistoincreasethetorquetransmittedbyDriveShaftordirectlytransmittedbyGearbox,thendistributesittoleftandrightwheel,andmakethesetwowheelshavethedifferentialfunctionwhichisrequiredinAutomobileDrivingKinematics;besides,theDrivingAxlemustalsostandtheleadhangsdownstrength,theHYPERLINK"javascript:showjdsw('showjd_0','j_0')"longitudinalforceandthetransverseforceactedontheroadsurface,theframeorthecompartmentlead.TheconfigurationoftheDrivingAxleisintroducedinthethesisatfirst.OnthebasisoftheanalysisofthestructureandthedevelopingprocessofDrivingAxle,thedesignadoptedtheIntegralDrivingAxle,DoubleReductionGearforMainDecelerator’sdecelerationform,HYPERLINK"javascript:showjdsw('showjd_0','j_0')"SpiralBevelGearforMainDecelerator’sgear,FullFloatingforAxleandCastingIntegralAxleHousingforAxleHousing.Inthedesign,weaccomplishedthedesignforDoubleReductionGear,HYPERLINK"http://dict.cnki.net/dict_result.aspx?searchword=%e5%9c%86%e9%94%a5&tjType=sentence&style=&t=tapered"taperedHYPERLINK"javascript:showjdsw('showjd_0','j_0')"PlanetaryGearDifferentialMechanism,FullFloatingAxle,thecheckingofAxleHousingandtheelectionofthematerialandsoon.Keywords:DrivingAxle；DoubleMainDecelerator；SingleReductionFinalDrive目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc280178360"摘要PAGEREF_Toc280178360\hIHYPERLINK\l"_Toc280178361"ABSTRACTPAGEREF_Toc280178361\h