汽车驱动桥设计毕业论文.doc

摘要驱动桥位于传动系末端，其基本功用是增矩、降速，承受作用于路面和车架或车身之间的作用力。它的性能好坏直接影响整车性能，而对于载重汽车显得尤为重要。当采用大功率发动机输出大的转矩以满足目前载重汽车的快速、重载的高效率、高效益的需要时，必须搭配一个高效、可靠的驱动桥，所以采用传动效率高的单级减速驱动桥已经成为未来载重汽车的发展方向。驱动桥设计应主要保证汽车在给定的条件下具有最佳的动力性和燃油经济性。本设计根据给定的参数，按照传统设计方法并参考同类型车确定汽车总体参数，再确定主减速器、差速器、半轴和桥壳的结构类型，最后进行参数设计并对主减速器主、从动齿轮、半轴齿轮和行星齿轮进行强度以及寿命的校核。驱动桥设计过程中基本保证结构合理，符合实际应用，总成及零部件的设计能尽量满足零件的标准化、部件的通用化和产品的系列化及汽车变型的要求，修理、保养方便，机件工艺性好，制造容易。关键字轻型货车驱动桥主减速器差速器大学本科毕业设计（论文）第II页AbstractDriveaxleisattheendofthepowertrain,anditsbasicfunctionisincreasingthetorqueandreducingthespeed,bearingtheforcebetweentheroadandtheframeorbody.Itsperformancewillhaveadirectimpactonautomobileperformance.Becauseusingthebigpowerenginewiththebigdrivingtorquesatisfiedtheneedofhighspeed，heavyloaded，highefficiency，highbenefittodayheavytruck，mustexploitingthehighdrivenefficiencysinglereductionfinaldriveaxleisbecomingtheheavytruckdevelopingtendency.Driveaxleshouldbedesignedtoensurethebestdynamicandfueleconomyongivencondition.Accordingtothedesignparametersgiven,firstlydeterminetheoverallvehicleparametresinaccordancewiththetraditionaldesignmethodsandreferencethesamevehicleparameters,thenidentifythemainreducer,differential,axleandaxlehousingstructuretype,finallydesigntheparametersofthemaingear,thedrivengearofthefinaldrive,axlegearsandspiralbevelgearandcheckthestrengthandlifeofthem.Indesignprocessofthedriveaxle,weshouldensureareasonablestructure,practicalapplications,thedesignofassemblyandpartsasmuchaspossiblemeetingrequirementsofthestandardizationofparts,componentsandproductsunivertialityandtheserializationandchange,convenienceofrepairandmaintenance,goodmechanicaltechnology,beingeasytomanufacture.Keywordslighttruckdriveaxlesinglereductionfinaldrive大学本科毕业设计（论文）第III页目录第一章绪论..................................................................................................................11.1论文研究的意义和目的...................................................................................11.2国内外研究现状及发展趋势...........................................................................21.3本论文的主要研究内容...................................................................................2第二章汽车总体参数的确定......................................................................................32.1给定设计参数..................................................................................................32.2汽车形式的确定..............................................................................................32.2.1汽车轴数和驱动形式的选择................................................................32.3汽车主要参数的选择......................................................................................42.3.1汽车主要尺寸的确定............................................................................42.3.2汽车质量参数的确定............................................................................72.3.3汽车性能参数的确定............................................................................92.4发动机的选择................................................................................................122.4.1发动机形式的选择..............................................................................122.4.2发动机主要性能指标的选择..............................................................122.5轮胎的选择....................................................................................................14第三章驱动桥的结构形式及选择............................................................................173.1概述................................................................................................................173.2驱动桥的结构形式........................................................................................173.3驱动桥构件的结构形式................................................................................193.3.1主减速器的结构形式..........................................................................203.3.2差速器的结构形式..............................................................................233.3.3驱动车轮传动装置的结构形式..........................................................243.3.4驱动桥桥壳的结构形式......................................................................25第四章驱动桥的设计计算........................................................................................274.1主减速器的设计与计算................................................................................274.1.1主减速比的确定...................................................................................274.1.2主减速器齿轮计算载荷的确定..........................................................284.1.3锥齿轮主要参数的选择......................................................................304.1.4主减速器锥齿轮的材料......................................................................324.1.5主减速器螺旋锥齿轮的几何尺寸计算...............................................334.1.6主减速器圆弧齿轮螺旋齿轮的强度计算..........................................374.2差速器的设计与计算....................................................................................414.2.1差速器齿轮主要参数选择..................................................................424.2.2差速器齿轮的材料..............................................................................444.2.3差速器齿轮几何尺寸计算..................................................................444.2.4差速器齿轮强度计算..........................................................................474.3全浮式半轴的设计........................................................................................494.3.1半轴基本参数计算及校核..................................................................494.3.2半轴的结构设计及材料与热处理.......................................................504.4驱动桥壳设计................................................................................................514.4.1桥壳的结构型式..................................................................................514.4.2桥壳的受力分析及强度计算...............................................................52大学本科毕业设计（论文）第IV页结论..............................................................................................................................54致谢............................................................................................错误未定义书签。参考文献................................................................................................................55