齿轮齿条转向器设计

西南科技大学城市学院本科生毕业论文I齿轮齿条式转向器设计摘要：本次设计选择的是丰田的一款汽车的转向器。首先对转向系统基本的作用、构造、与总体的性能作一个了解。再根据对齿轮齿条式转向器的研究以及资料的查阅，着重阐述了齿轮齿条式转向器类型选择，不同类型齿轮齿条式转向器的优缺点，和各种类型齿轮齿条式转向器应用状况。根据原有数据计算转向系的传动比，并确定齿轮齿条的几何参数。齿轮齿条式转向器总体设计，受力分析，及对齿轮齿条的疲劳强度校核、齿根弯曲疲劳强度校核。修正齿轮齿条式转向器中不合理的数据。通过对齿轮齿条式转向器的设计，选取出相关的零件如螺钉、轴承等，并在作出转向器的零件图。关键词：转向系统；齿轮齿条；转向器西南科技大学城市学院本科生毕业论文IIRackandpinionsteeringdesignAbstract：ThisdesignchoiceisthesteeringofacarintheToyota.First,thebasicroleofthesteeringsystem,structure,andoverallperformanceforanunderstanding.Accordingtothestudyoftherackandpinionsteeringanddataaccess,focusesonarackandpinionsteeringgeartypeselection,theadvantagesanddisadvantagesofdifferenttypesofrackandpinionsteering,andalltypesofrackandpinionsteeringapplicationstatus.Thesteeringtransmissionratiocalculatedundertheoriginaldata,anddeterminethegeometricparametersoftherackandpinion.Rackandpinionsteeringtheoveralldesign,stressanalysis,andrackandpinionfatiguestrengthofthetoothrootbendingfatiguestrength.Unreasonabledatacorrectionrackandpinionsteering.Throughthedesignoftherackandpinionsteering,selecttherelatedpartssuchasscrews,bearings,etc.,andmakethesteeringpartsdiagram.Keywords：Steeringsystems,rackandpinion,steering西南科技大学城市学院本科生毕业论文III目录第1章绪论.........................................................................................................................11.1概述........................................................................................................................11.2转向器的作用与分类............................................................................................11.3汽车转向装置的发展趋势....................................................................................21.4汽车转向器国内外现状........................................................................................41.5设计的主要内容....................................................................................................5第2章齿轮齿条转向器设计方案选择.............................................................................72.1车辆相关数据与设计要求....................................................................................72.2转向器总体方案设计............................................................................................92.2.1转向器设计方案说明.................................................................................92.2.2转向器输入输出形式.................................................................................92.2.3转向器各种输出形式对比.........................................................................92.2.4齿轮齿条转向器齿轮齿条选择...............................................................102.2.5齿轮齿条转向器齿条断面形状...............................................................102.2.6齿轮齿条式转向器的布置形式...............................................................112.2.7转向器最终方案确定...............................................................................12第3章转向器齿轮齿条设计计算过程...........................................................................133.1转向轮侧偏角计算..............................................................................................133.2转向器原地转向阻力矩计算..............................................................................143.3转向器角传动比与力传动比计算......................................................................143.3.1角传动比与力传动比介绍.......................................................................143.3.2角传动比与力传动比确定.......................................................................143.4齿轮齿条设计......................................................................................................153.4.1齿轮齿条啮合传动的特点.......................................................................153.4.2齿轮参数的选择.......................................................................................163.4.3计算接触疲劳许用应力...........................................................................173.4.4齿轮的齿根弯曲强度设计.......................................................................183.4.5确定齿轮主要参数和几何尺寸...............................................................19西南科技大学城市学院本科生毕业论文IV3.4.6确定齿条主要参数和几何尺寸...............................................................203.4.7齿面接触疲劳强度校核...........................................................................21第4章齿轮轴的设计.......................................................................................................224.1齿轮齿条传动受力分析......................................................................................224.2齿轮轴最小轴径确定..........................................................................................224.3齿轮轴的强度校核..............................................................................................23第5章间隙调整弹簧的设计计算...................................................................................275.1选择材料..............................................................................................................275.2计算弹簧丝直径..................................................................................................275.3弹簧圈数和自由高度的计算..............................................................................285.4弹簧校核与结构尺寸确定........................