齿轮齿条式转向器优化设计

目录…………………….……………….…………………山东农业大学毕业论文齿轮齿条式转向器优化设计院部机械与电子工程学院专业班级车辆工程2班届次2014届学生姓名张琼学号20100736指导教师赵冉二О一四年六月十日装订线……………….…….………….………….………1摘要........................................................................5Abstract....................................................................6引言........................................................................71轿车转向器总述............................................................81.1转向器的分类及现状....................................................81.2转向器的工作原理......................................................91.2.1齿轮齿条转向器工作原理.............................................91.2.2动力转向系统的工作原理............................................101.3转向系的设计要求.....................................................102轿车转向器的方案分析及参数选择...........................................112.1转向器的选择.........................................................112.2转向控制阀...........................................................112.3转向系压力流量类型选择...............................................122.4液压泵的选择.........................................................122.5参考数据的确定.......................................................122.5.1桥车的转向参数的确定..............................................122.5.2转向系的效率......................................................132.5.3阿克曼几何学......................................................132.5.4转向系传动比......................................................142.6转向器计算载荷的确定.................................................142.6.1原地转向阻力距..................................................142.6.2转向盘手力........................................................153转向器齿轮齿条的设计计算.................................................153.1齿轮齿条设计.........................................................153.2齿条的强度计算.......................................................173.2.1齿条的受力分析....................................................173.2.2齿条杆部受拉压的强度计算.........................................183.2.3齿条齿部弯曲强度的计算............................................193.3小齿轮的强度计算.....................................................193.3.1.齿面接触疲劳强度计算.............................................193.3.2齿轮齿根弯曲疲劳强度计算..........................................224齿轮轴的结构设计.........................................................235其它零部件的选择.........................................................245.1轴承的选择...........................................................245.2转向器的润滑方式和密封类型的选择.....................................255.3弹簧的选择...........................................................2526转向器部分零件图.........................................................26设计总结...................................................................27参考文献...................................................................28致谢...................................................................29Contents3Abstract....................................................错误!未定义书签。Introduction...............................................错误!未定义书签。1Carsteeringoverview.....................................错误!未定义书签。1.1Theclassificationandcurrentsituationofthesteeringdevice错误!未定义书签。1.2Workingprincipleofthesteeringgear................错误!未定义书签。1.2.1Workingprincipleofrackandpinionsteering......错误!未定义书签。1.2.2Theworkingprincipleofthepowersteeringsystem..错误!未定义书签。1.3Thedesignrequirementsofthesteeringsystem........错误!未定义书签。2Analysisonthesteeringsystemandparameterselectionofcar错误!未定义书签。2.1Steeringgearselection...............................错误!未定义书签。2.2Steeringcontrolvalve................................错误!未定义书签。2.3Steeringsystempressureandflowtypeselection.......错误!未定义书签。2.4Thechoiceofthehydraulicpump......................错误!未定义书签。2.5Determinethereferencedata..........................错误!未定义书签。2.5.1Todeterminetheparametersofthebridgevehiclesteering错误!未定义书签。2.5.2Theefficiencyofsteeringsystem..................错误!未定义书签。2.5.3Ackermangeometry..................................错误!未定义书签。2.5.4Steeringratio....................................错误!未定义书签。2.6Apparatusfordeterminingloadcalculation............错误!未定义书签。2.6.1Steeringresistancefrom..........................错误!未定义书签。2.6.2Steeringforce....................................错误!未定义书签。3Designandcalculationofsteeringgearrack..............错误!未定义书签。3.1Rackandpiniondesign................................错误!未定义书签。3.2Thestrengthcalculationofrack......................错误!未定义书签。3.2.1Stressanalysisofrack............................错误!未定义书签。3.2.2Calculationofrackrodtensionandcompressionstrength错误!未定义书签。3.2.3Calculationofracktoothbendingstrength..........错误!未定义书签。3.3Thecalculationofsmallgearstrength................错误!未定义书签。3.3.1Calculationofcontactfatiguestrength...........错误!未定义书签。3.3.2Calculationofbendingfatiguestrengthofgeartooth错误!未定义书签。4Structuredesignofgearshaft............................错误!未定义书签。5choiceoftheparts......................................错误!未定义书签。5.1Bearingselection....................................错误!未定义书签。45.2Steeringgearlubricationandsealtypeselection......错误!未定义书签。5.3Choiceofspring.....................................错误!未