重型货车驱动桥差速器设计

重型货车驱动桥差速器设计08机械设计制造及其自动化姓名XXX学号080215指导老师XXX摘要本次设计的题目是重型货车驱动桥设计。驱动桥一般由主减速器、差速器、半轴及桥壳四部分组成，其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。本设计首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，差速器采用普通对称式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。在本次设计中，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。关键词：驱动桥；设计；计算；校核；材料TheDesignforDrivingAxleofHeavyTruck专业机械姓名李欢学号080215指导老师何东伟AbstractTheobjectofthedesignisTheDesignforDrivingAxleofHeavyTruck.DrivingAxleisconsistedofMainDecelerator,DifferentialMechanism,HalfShaftandAxleHousing.ThebasicfunctionofDrivingAxleistoincreasethetorquetransmittedbyDriveShaftordirectlytransmittedbyGearbox,thendistributesittoleftandrightwheel,andmakethesetwowheelshavethedifferentialfunctionwhichisrequiredinAutomobileDrivingKinematics;besides,theDrivingAxlemustalsostandtheleadhangsdownstrength,thelongitudinalforceandthetransverseforceactedontheroadsurface,theframeorthecompartmentlead.TheconfigurationoftheDrivingAxleisintroducedinthethesisatfirst.OnthebasisoftheanalysisofthestructureandthedevelopingprocessofDrivingAxle,thedesignadoptedtheIntegralDrivingAxle,DoubleReductionGearforMainDecelerator’sdecelerationform,SpiralBevelGearforMainDecelerator’sgear,FullFloatingforAxleandCastingIntegralAxleHousingforAxleHousing.Inthedesign,weaccomplishedthedesignforDoubleReductionGear,taperedPlanetaryGearDifferentialMechanism,FullFloatingAxleandAxleHousing.Keywords:DrivingAxle;Design;Calculation;Check;Material目录1绪论.......................................................................11.1设计主要参数....................................................................................................................................11.2驱动桥的结构和种类........................................................................................................................11.2.1汽车车桥的种类....................................................................................................................11.2.2驱动桥的种类........................................................................................................................11.2.3驱动桥结构组成....................................................................................................................21.3设计主要内容....................................................................................................................................52设计方案的确定...............................................................62.1主减速比得计算................................................................................................................................62.2主减速器结构方案的确定........................................................................................................62.3差速器结构方案的确定............................................................................................................62.4半轴型式的确定........................................................................................................................72.5桥壳型式的确定........................................................................................................................72.6本章小结....................................................................................................................................73主减速器设计.................................................................83.1主减速齿轮计算载荷的确定....................................................................................................83.2主减速齿轮参数的确定............................................................................................................93.3主减速器螺旋锥齿轮的几何尺寸计算与强度计算................................................................93.3.1主减速器螺旋锥齿轮的几何尺寸计算................................................................................93.3.2主减速器螺旋锥齿轮的强度计算......................................................................................103.4主减速器齿轮的材料和热处理..............................................................................................133.5主减速器轴承的计算..............................................................................................................133.6锥齿轮轴承型号的确定..........................................................................................................153.7主减速器的润滑......................................................................................................................163.8本章小结..................................................................................................................................164差速器设计..................................................................174.1概述..........................................................................................................................................174.2差速器的作用..........................................................................................................................174.3对称是圆锥形星齿轮差速器..................................................................................................174.4本章小结.....................................