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当前位置:首页 > 机械/制造/汽车 > 汽车理论 > 汽车主减速器设计说明书
本科毕业设计(论文)I摘要汽车主减速器是汽车传动中的最重要的部件之一。它能够将万向传动装置产来的发动机转矩传给驱动车轮,以实现降速增扭。本次设计的是有关十米高一级客车后桥主减速器设计总成。并要使其具有通过性。本次设计的内容包括有:方案选择,结构的优化与改进。齿轮与齿轮轴的设计与校核,以及轴承的选用与校核。并且在设计过程中,描述了主减速器的组成和差速器的差速原理和差速过程。方案确定主要依据原始设计参数,对比同类型的减速器及差速器,确定此轮的传动比,并对其中重要的齿轮进行齿面接触和齿轮弯曲疲劳强度的校核。而对轴的设计过程中着重齿轮的布置,并对其受最大载荷的危险截面进行强度校核,轴承的选用力求结构简单且满足要求。主减速器及差速器对提高汽车行驶平稳性和其通过性有着独特的作用,是汽车设计的重点之一。关键词:主减速器;差速器;转速;行星齿轮;传动比本科毕业设计(论文)IIAbstractAutomobilreductionfinaldriveisoneofthebestimpossiblepartsinautomobilegearing.Itcanchangspeedanddrivingtuistwithinabigscope.Theproblemofthisdesignistenmeterspassagercarreductionfinalunit,it’sproperlyincommonuse.Thedesignofscheme,thebetterdesignandimprovementofstructure,thedesignandcalibrationofgearandgearshiftes,andtheselectofbearings,andalsothedesignexplaintheconstructionofdifferentialaction.Thetingoftheschemedesiermentmaindeside.Thedriveratioofgear,accordingtoorginaldesignparameterandconstrastingthesametypereductionfinaldriveangdifferentialassay.Itrealizeplanetgearinthedesignofstructure.Itputtousealterationbettergearstransmissioninthedesignofgear,andcomparetherootcontacttiredstrengthofsomeimportantgearsandthefacetwirltiredstrength.Iteraphaizepayattentiontotheplaceofgears.Comparethestrengthofthebiggestloaddangraessection.Itrequirestructuresimpleandaccordwithdemandinselectofbearings.Keywords:Reductionfinal,Differential,Rotationalspeed,Plantetgear,Driveratio本科毕业设计(论文)III目录摘要......................................................................IAbstract.................................................................II目录...................................................................III第1章绪论..............................................................1第2章主减速器的结构形式...............................................22.1主减速器的齿轮类型.................................................22.2主减速器的减速形式.................................................22.3主减速器主、从动锥齿轮的支承方案...................................22.3.1主动锥齿轮的支承..............................................22.3.2从动锥齿轮的支承..............................................32.3.3主减速器的轴承预紧及齿轮啮合调整..............................4第3章主减速器基本参数选择与计算载荷的确定.............................53.1主减速器齿轮计算载荷的确定.........................................53.1.1按发动机最大转矩和最大抵挡传动比确定从动锥齿轮的计算转矩Tce..53.1.2按驱动轮打滑转矩确定从动锥齿轮的计算转矩csT...................53.1.3按汽车日常行驶平均转矩确定从动锥齿轮的计算转矩CfT.............63.2锥齿轮主要参数的选择..................................................63.2.1主、从动锥齿轮齿数Z1和Z2......................................63.2.2从动锥齿轮大端分度圆直径D2和端面模数ms........................73.2.3主、从动锥齿轮齿面宽b1和b2....................................73.2.4双曲面齿轮副偏移距E..........................................83.2.5中点螺旋角..................................................83.2.6螺旋方向......................................................93.2.7法向压力角α.................................................10第4章主减速器锥齿轮的几何尺寸计算....................................114.1锥齿轮轮齿形状的选择..............................................114.2锥齿轮的几何尺寸计算..............................................11本科毕业设计(论文)IV第5章主减速器锥齿轮的强度计算........................................145.1单位齿长圆周力....................................................145.2轮齿弯曲强度......................................................145.3轮齿接触强度......................................................16第6章主减速器锥齿轮轴承的载荷计算....................................186.1锥齿轮齿面上的作用力..............................................186.1.1齿宽中点处的圆周力...........................................186.1.2锥齿轮的轴向力和径向力.......................................186.2锥齿轮轴承的载荷计算..............................................196.3锥齿轮轴承的寿命计算..............................................206.3.1A轴承的寿命计算.............................................206.3.2B轴承的寿命计算.............................................206.3.3C、D轴承的寿命计算..........................................21第7章齿轮材料.........................................................22第8章对称式圆锥行星齿轮差速器设计....................................238.1差速器齿轮主要参数选择............................................238.1.1行星齿轮数n.................................................238.1.2行星齿轮球面半径Rb...........................................238.1.3行星齿轮和半轴齿轮齿数Z1和Z2.................................238.1.4行星齿轮和半轴齿轮节锥角、模数及半轴齿轮节圆直径的初步确定...248.1.5压力角α.....................................................248.1.6行星齿轮轴直径d及支承长度L.................................248.2差速器轮齿的几何计算..............................................258.3差速器齿轮强度计算................................................26第9章驱动桥半轴设计...................................................269.1全浮式半轴计算....................................................279.2半轴的结构设计....................................................279.2.1全浮式半轴杆部直径设计.......................................279.2.2半轴杆部设计其他要求.........................................279.3半轴的强度校核....................................................28本科毕业设计(论文)V9.3.1半轴的扭转应力...............................................289.3.2半轴花键的剪切应力...........................................289.3.3半轴花键的挤压应力...........................................29结论................................
本文标题:汽车主减速器设计说明书
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