齿轮齿条转向器设计-毕业论文

中北大学信息商务学院2014届毕业论文说明书1某汽车操作机构的设计摘要：本课题的题目是汽车操作系统的设计。主要以齿轮齿条转向器的设计为中心，一是轿车转向系统总述；二是机械转向器的选择；三是齿轮和齿条的合理匹配，以满足转向器的正确传动比和强度要求；四是动力转向机构设计；五是梯形结构设计。因此本课题在考虑上述要求和因素的基础上研究利用转向盘的旋转带动传动机构的齿轮齿条转向轴转向，通过万向节带动转向齿轮轴旋转，转向齿轮轴与转向齿条啮合，从而促使转向齿条直线运动，实现转向。实现了转向器结构简单紧凑，轴向尺寸短，且零件数目少的优点又能增加助力，从而实现了汽车转向的稳定性和灵敏性。在本文中主要进行了转向器齿轮齿条的设计和对转向齿轮轴的校核，主要方法和理论采用汽车设计的经验参数和大学所学机械设计的课程内容进行设计，其结果满足强度要求，安全可靠。关键词：轿车转向系齿轮齿条设计转向梯形中北大学信息商务学院2014届毕业论文说明书2CarsOperatingSystemDesignAbstract：ThetitleofthistopicisthedesignofCarOperatingSystem.Rackandpinionsteeringgeartothedesignasthecenter,firstarecars’steeringsystemoverview;Second,Carssteeringsystemperformanceparameters;thirdrackgearandareasonablematchtomeetthecorrectsteeringgearratioandstrengthrequirements;Fourth,powersteeringmechanismdesign;Fifth,thestructuraldesignoftrapezoidal.Therefore,takingintoaccounttheaboveissuesandfactorsthatrequirestudy,basedonthesteeringwheelrotarydrivetransmissionshaftofthesteeringrackandpinionsteering,throughtheuniversaljointdriveshaftrotationgearshift,steeringrackandsteeringgearshaftmeshing,therebyencouragingsteeringracklinearmotiontoachievesteering.Simplestructuretoachievethesteeringtight,shortaxialdimension,andthenumberofpartscanincreasetheadvantagesoflesspowerinordertoachievethevehiclesteeringstabilityandsensitivity.Inthisarticleamajordesignsteeringrackandpinionsteeringgearshaftandthecheck,themainmethodsandtheoreticalexperienceintheuseofautomotivedesignparametersandtheUniversityofmechanicaldesignschoolcurriculumdesignandtheresultsmeetthestrengthrequirements,safeandreliable.Keywords:Car;Steering;MechanicalTypeSteeringGearandGearRack;SteeringTrapezoidal中北大学信息商务学院2014届毕业论文说明书3目录第1章绪论.........................................................................................................................51.1概述.........................................................................................错误!未定义书签。1.2转向器的作用与分类.............................................................错误!未定义书签。1.3汽车转向装置的发展趋势.....................................................错误!未定义书签。1.4汽车转向器国内外现状.........................................................错误!未定义书签。1.5设计的主要内容....................................................................................................8第2章齿轮齿条转向器设计方案选择.............................................................................92.1车辆相关数据与设计要求....................................................................................92.2转向器总体方案设计..........................................................................................112.2.1转向器设计方案说明...............................................................................112.2.2转向器输入输出形式...............................................................................112.2.3转向器各种输出形式对比.......................................................................122.2.4齿轮齿条转向器齿轮齿条选择...............................................................122.2.5齿轮齿条转向器齿条断面形状...............................................................122.2.6齿轮齿条式转向器的布置形式...............................................................132.2.7转向器最终方案确定...............................................................................14第3章转向器齿轮齿条设计计算过程...........................................................................153.1转向轮侧偏角计算..............................................................................................153.2转向器原地转向阻力矩计算..............................................................................163.3转向器角传动比与力传动比计算......................................................................163.3.1角传动比与力传动比介绍.......................................................................163.3.2角传动比与力传动比确定.......................................................................163.4齿轮齿条设计......................................................................................................173.4.1齿轮齿条啮合传动的特点.......................................................................173.4.2齿轮参数的选择.......................................................................................183.4.3计算接触疲劳许用应力...........................................................................193.4.4齿轮的齿根弯曲强度设计.......................................................................20中北大学信息商务学院2014届毕业论文说明书43.4.5确定齿轮主要参数和几何尺寸...............................................................213.4.6确定齿条主要参数和几何尺寸...............................................................223.4.7齿面接触疲劳强度校核...........................................................................23第4章齿轮轴的设计.......................................................................................................244.1齿轮齿条传动受力分析......................................................................................244.2齿轮轴最小轴径确定..........................................................................................244.3齿轮轴的强度校核..............................................................................................25第5章间隙调整弹簧的设计计算...................................................................................295.1选择材料......