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摘要驱动桥作为在汽车构造中的一个必不可缺的一部分，驱动桥的性能好坏直接关系到了整辆车的性能好坏，在载货汽车中显得更加尤为重要。本设计依照驱动桥的基本设计方法对载货汽车的后驱动桥进行了设计。首先对驱动桥总成的结构型式及布置进行确定采用非断开式驱动桥，然后对载货汽车的一些主要参数进行确定。其次根据驱动桥的型式，确定一个总体设计方案。最后对驱动桥中的主减速器、差速器、半轴和驱动桥壳进行数据计算，并对主减速器中的主动锥齿轮、从动锥齿轮；差速器中的行星齿轮和半轴齿轮；全浮式半轴和钢板冲压焊接整体式桥壳的强度进行了计算校核，以及主减速器中的支承轴承进行了寿命计算校核。本设计在主减速器的设计中采用的是一对螺旋锥齿轮的单级主减速器，主动锥齿轮的支承形式采用悬臂式，从动锥齿轮的支承形式选择无幅式结构，轴承均采用圆锥滚子轴承。通过本设计可以认识到驱动桥对载货汽车的重要性，并对驱动桥的构造能有一定深度地了解。关键词：载货汽车驱动桥主减速器差速器半轴ABSTRACTDrivingbridgeasanindispensablepartofthecarstructure,drivingbridgeperformanceisdirectlyrelatedtotheperformanceofthewholecarisgoodorbad,inthetruckisevenmoreimportant.Thisdesignisdesignedaccordingtothebasicdesignmethodofthedrivingaxletotherearaxleofthetruck.Firstofall,thestructureofthedriveaxleassemblyandlayouttodeterminetheuseofnon-opendriveaxle,andthensomeofthemainparametersofthetrucktodetermine.Followedbythetypeofdriveaxletodetermineageneraldesign.Finally,themainaxleinthedriveaxle,differential,axleanddriveaxlehousingdatacalculation,andthemainreducerintheactivebevelgear,drivenbevelgear;differentialintheplanetarygearandaxleGear;full-floatingaxleandsteelplatestampingweldingtheoverallstrengthoftheaxlewascalculatedtocheck,andthemainbearinginthebearingbearingthelifeofthecalculationcheck.Thedesignofthemainreducerinthedesignofapairofspiralbevelgearsingle-stagemainreducer,theactivebevelgearsupporttheuseofcantilevered,drivenbevelgearbearingthechoiceofno-typestructure,bearingsareusedTaperedRollerBearings.Throughthisdesigncanrecognizetheimportanceofthedriveaxleonthetruck,andtheconstructionofthebridgecanhaveacertaindepth.Keywords:LorryDriveaxleMaindeceleratorDifferentialSemiaxis目录1前言............................................................................................................................12驱动桥的总体结构型式和布置..................................................................................23主减速器............................................................................................................................43.1主减速器的基本参数和结构型式.............................................................................43.1.1主减速比的确定..............................................................................................43.1.2主减速器的齿轮类型选择..............................................................................43.1.3主减速器中的主、从螺旋锥齿轮的支承和安装的方式..............................53.1.4主减速器的减速型式......................................................................................53.2主减速器的计算.........................................................................................................53.2.1主减速器齿轮计算载荷确定..........................................................................53.2.2主减速器从动齿轮的平均计算转矩T3.........................................................63.3主减速器的齿轮基本参数选择.................................................................................63.3.1主、从动螺旋锥齿轮齿数的选择..................................................................63.3.2从动螺旋锥齿轮的模数和节圆直径..............................................................73.3.3螺旋锥齿轮齿宽F..........................................................................................73.3.4螺旋角β的确定............................................................................................73.3.5螺旋锥齿轮的螺旋方向的确定......................................................................83.3.6法向压力角的确定..........................................................................................83.4主减速器的主、从螺旋锥齿轮的详细尺寸.............................................................83.5主减速器螺旋锥齿轮的强度计算.............................................................................93.5.1齿轮的损坏形式..............................................................................................93.5.2主减速器螺旋锥齿轮的强度计算..................................................................93.5.3螺旋锥齿轮的弯曲强度计算........................................................................103.5.4螺旋锥齿轮的齿面接触强度计算................................................................123.6主减速器轴承的计算...............................................................................................133.6.1主减速器主动锥齿轮上的当量转矩............................................................133.6.2螺旋锥齿轮齿面宽中点处的圆周力............................................................133.6.3螺旋锥齿轮的轴向力和径向力....................................................................133.6.4主减速器的轴承载荷计算............................................................................144差速器...............................................................................................................................174.1差速器的结构型式选择...........................................................................................174.2对称式圆锥行星齿轮差速器的结构.......................................................................174.3对称式圆锥行星齿轮差速器...................................................................................174.3.1差速器齿轮的基本参数................................................................................174.3.2差速器齿轮的主要尺寸..........................................................................