奇瑞QQ611汽车前后悬架设计说明书

本科生毕业设计（论文）I摘要本次设计的奇瑞QQ611汽车前后悬架均采用独立式悬架，前悬架采用麦弗逊式独立悬架的形式，后悬架采用拖曳臂式独立悬架的形式。根据已经确定的悬架结构形式，布置空间，以及轿车必要的参数进行分析，获得减振器的主要参数，计算减振器主要零件尺寸，设计减振器结构，实现要求的功能。在匹配分析中，减振器部分的设计计算主要从简化的力学模型入手分析悬架与地面、车身间的位置和受力关系。通过减振器与车身的匹配关系来定位减振器相关参数的计算方法，从而有针对性的计算出满足QQ611汽车悬架的固有频率、阻尼系数及阻尼比。在结构设计中，主要从减振器的功能入手，在一切已知数据的指导下，进行科学的理论计算，确定主要部件的尺寸。针对QQ611汽车的用途及实际情况进行结构改进，以适应使用要求。在汽车悬架的平顺性分析中，运用Matlab绘制了车身加速度幅频特性曲线，研究它们对减振器参数的影响。本文所做工作可以为汽车的减振器匹配与结构设计提供一定理论依据，具有一定的实际意义。关键词：减振器；匹配分析；结构设计；平顺性本科生毕业设计（论文）IIAbstractThedesignofQQ611Cheryautomobileandadoptindependentsuspension,suspensionusingmacphersonsuspensionintheformofindependentsuspension,rearsuspensionusingdragarmindependentsuspensionofform.Accordingtothesuspensionstructurehasbeendetermined,decorateaspace,andcarswereanalyzed,thenecessaryparametersobtainedshockabsorberparameters,calculationofmainpartssize,design,realizationofshockabsorberstructurerequiredfunctions.Inpart,theshockabsorberinmatchingthedesignandcalculationofmainfromsimplifiedmechanicalmodelofsuspensionandground,betweenthebodyandtherelationshipbetweenstressposition.Throughthematchingrelationwithbodyshockabsorbertolocaterelatedparameterscalculationmethod,whichiscalculatedQQ611satisfythenaturalfrequencyoftheautomobilesuspension,dampingcoefficientandthedampingratio.Instructuraldesign,mainlyfromthefunctionofshockabsorber,inallknowndata,undertheguidanceofthescientifictheoreticalcalculation,determinethesizeofthemainparts.QQ611accordingtoactualsituationandtheuseofautomobilestructuretoadapttotherequirementsofoperation.Intheautomobilesuspensionsmoothanalysis,usingMatlabpaintedbodyworkaccelerationcurves,theamplitudefrequencycharacteristicsofdamperparametersarestudied.Thiscanworkfortheautomotiveshockabsorberandprovidecertaintheoreticalbasisforstructuredesign,hascertainpracticalsignificance.Keywords：shockabsorber；matchinganalysis；structuredesign；ridecomfort本科生毕业设计（论文）III目录第1章绪论..........................................................................................................11.1减振器结构设计的意义...........................................................................11.2悬架的重要性...........................................................................................1第2章悬架的方案论证........................................................................................22.1汽车悬架及减振器的性能要求...............................................................22.2悬架结构形式分析...................................................................................22.2.1悬架的分类及特点........................................................................22.2.2悬架结构形式的方案论证............................................................32.3悬架弹性元件及减振器的特性...............................................................52.3.1悬架弹性元件的特性....................................................................52.3.2减振器的特性................................................................................5第3章减振器的结构设计....................................................................................73.1QQ611汽车相关参数................................................................................73.2减振器与悬架系统的匹配分析...............................................................73.2.1平顺性的概念................................................................................73.2.2结构参数对平顺性的影响............................................................83.2.3使用因素对平顺性的影响............................................................83.2.4阻尼比的选取................................................................................93.2.5前悬架减振器的匹配分析............................................................93.2.6后悬架减振器的匹配分析..........................................................113.3减振器受力分析.....................................................................................123.3.1前减振器的受力分析..................................................................123.3.2后减振器的受力分析..................................................................143.4减振器主要尺寸选择.............................................................................143.4.1前减振器的主要尺寸选择..........................................................143.4.2后减振器的主要尺寸选择..........................................................183.5减振器的结构设计.................................................................................213.5.1减振器的主要结构形式及工作原理..........................................213.5.2活塞阀系的设计..........................................................................223.5.3底阀系的设计..............................................................................24本科生毕业设计（论文）IV3.6主要零件材质的选择.............................................................................263.6.1活塞杆材质的选择......................................................................263.6.2工作缸和储油缸材质的选择......................................................263.6.3阀片和口片材质的选择..............................................................26第4章工艺过程设计..........................................................................................274.1活塞杆的工艺过程设计.........................................................................274.2顶盖的加工