轻型客车驱动桥设计说明书

本科生毕业设计（论文）I摘要驱动桥作为汽车四大总成之一，它的性能的好坏直接影响整车性能，对于轻型客车也很重要。驱动桥位于传动系的末端，它的基本功用是将传动轴或变速器传来的转矩增大并适当减低转速后分配给左、右驱动轮，另外还承受作用于路面和车架或车身之间的垂直力，纵向力和横向力。通过提高驱动桥的设计质量和设计水平，以保证汽车良好的动力性、安全性和通过性。此次轻型客车驱动桥设计主要包括：主减速器、差速器、车轮传动装置和驱动桥壳进行设计。主减速器采用单级主减速器；差速器设计采用普通对称圆锥行星差速器；车轮传动装置采用全浮式半轴；驱动桥壳采用整体型式；并对驱动桥的相关零件进行了校核。本文驱动桥设计中，利用了CAXA绘图软件表达整体装配关系和部分零件图。关键词：驱动桥；主减速器；差速器；半轴；桥壳本科生毕业设计（论文）IIAbstractDriveaxleistheoneofautomobilefourimportantassemblies.It’sperformancedirectlyinfluencesontheentireautomobile，especiallyfortheSportsUtilityVehicles.Drivingaxlesetattheendofthetransmissionsystem.Thebasicfunctionofdrivingaxleistoincreasethetorquetransportedfromthetransmissionshaftortransmissionanddecreasethespeed,thendistributeittotheright、leftdrivingwheel,anotherfunctionistobeartheverticalforce、lengthwaysforceandtransversalsforcebetweentheroadsurfaceandthebodyortheframe.Inordertoobtainagoodpowerperformance,safetyandtrafficabilitycharacteristic,engineersmustpromotequalityandlevelofdesignDrivingaxledesignoftheZotye2008SportsUtilityVehiclesmainlycontains:maingearbox,differential,transmittedapparatusofwheelandthehousingofdrivingaxle.Themaingearboxadoptedsinglereductiongearandthedifferentialadoptedacommon,symmetry,taper,planetgear.Transmissionapparatusofwheeladoptedfullfloatingaxleshaft,andthehousingofdrivingaxleadoptedthewholepattern,andproofreadinterrelatedparts.Duringthedesignprocess,CAXAdraftingsoftwareisusedtoexpressesthewholestoassemblerelationshipandpartdrawingbydrafting.Keywords：drivingaxle;maingearbox;differential;halfshaft;housing本科生毕业设计（论文）III目录第1章绪论..................................................................................................................11.1驱动桥简介...............................................................................................11.2驱动桥设计的要求...................................................................................1第2章驱动桥的结构方案分析....................................................................................3第3章驱动桥主减速器设计........................................................................................53.1主减速器简介...........................................................................................53.2主减速器的结构形式...............................................................................53.3主减速器的齿轮类型...............................................................................53.4主减速器主动齿轮的支承型式...............................................................63.5主减速器的减速型式...............................................................................73.6主减速器的基本参数选择与设计计算...................................................73.6.1主减速比的确定............................................................................73.6.2主减速器齿轮计算载荷的确定....................................................83.6.3主减速器齿轮基本参数选择........................................................93.6.4主减速器双曲面锥齿轮设计计算..............................................113.6.5主减速器双曲面齿轮的强度计算..............................................183.7主减速器齿轮的材料及热处理.............................................................22第4章差速器设计......................................................................................................244.1差速器简介.............................................................................................244.2差速器的结构形式的选择.....................................................................244.2.1对称式圆锥行星齿轮差速器的差速原理..................................254.2.2对称式圆锥行星齿轮差速器的结构..........................................264.3差速器齿轮主要参数的选择.................................................................264.4差速器齿轮的几何尺寸计算与强度校核.............................................28第5章驱动车轮的传动装置......................................................................................315.1车轮传动装置简介.................................................................................315.2半轴的型式和选择.................................................................................315.3半轴的设计计算与校核.........................................................................315.4半轴的结构设计及材料与热处理.........................................................33第6章驱动桥壳设计..................................................................................................34本科生毕业设计（论文）IV6.1驱动桥壳简介.........................................................................................346.2驱动桥壳的结构型式及选择.................................................................346.3驱动桥壳强度分析计算.........................................................................356.3.1当牵引力或制动力最大时..........................................................356.3.2通过不平路面垂直力最大时......................................................36第7章结论..................................................................................................................37参考文献........................................................................................................................38致谢..............................................................................................................................39附录A.............................