双横臂独立悬架设计毕业设计

华东交通大学毕业设计I双横臂独立悬架设计摘要双横臂式独立悬架，是一种车轮在汽车横向平面内摆动的独立悬架，这种独立悬架被广泛应用在轿车前轮上。双横臂式独立悬架按上、下横臂是否等长，又分为等长双横臂式和不等长双横臂式两种悬架。等长双横臂式悬架在车轮上下跳动时，能保持主销倾角不变，但轮距变化大(与单横臂式相类似)，造成轮胎磨损严重，现已很少用。对于不等长双横臂式悬架，只要适当选择、优化上下横臂的长度，并通过合理的布置，就可以使轮距及前轮定位参数变化均在可接受的限定范围内，这种结构有利于减少轮胎磨损，提高汽车行驶平顺性和方向稳定性，保证汽车具有良好的行驶稳定性。目前不等长双横臂式悬架已广泛应用在轿车的前后悬架上，部分运动型轿车及赛车的后轮也采用这一悬架结构。本次课题设计根据悬架系统设计的基本要求和给定的参数，完成了双横臂独立悬架的设计。关键词:汽车；双横臂独立悬架；螺旋弹簧；减振器何建勋：双横臂独立悬架设计IIThedesignofdouble-wishboneindependentsuspensionAbstractDoublewishbone-typeindependentsuspension,ofwhichthewheelsswinginahorizontalplaneinthecar,anindependentsuspensionthathasbeenwidelyusedincarsonthefront.Doublewishbone-typeindependentsuspensioninaccordancewiththeupperandlowerarmlength,etc.arealsodividedintoequallengthdoublewishboneandalongrangetwo-typedoublewishbonesuspension.Suchaslongdoublewishbonesuspensioninthewheelupanddownbeat,thekingpininclinationtomaintainthesame,butchangesinTreadlarge(withasinglearmissimilar),resultinginseveretirewear,isnowseldomused.Thelengthdoublewishbonesuspension,aslongastheappropriatechoice,tooptimizethelengthofupperandlowerarm,andareasonablelayout,youcanmakeTreadandthefrontwheelalignmentparametersarewithinacceptablelimitsthescopeofthisstructurehelpstoreducetirewearandimprovevehicleridecomfortanddirectionalstability,andensurethecarhasagooddrivingstability.Thecurrentlengthdoublewishbonesuspensionhasbeenwidelyusedinthefrontandrearsuspensioncars,somesportsandracingcarsoftherearwheelisalsousedinthissuspensionstructure.Thesubjectofthedesignofsuspensionsystemdesigncompleteadoublewishbone-independentsuspensiondesigninaccordancewiththebasicrequirementsandthegivenparameters.Keywords:Vehicle;Double-wishbonesuspension;Coilspring;Shockabsorbers华东交通大学毕业设计目录摘要....................................................................................................................................................................IAbstract........................................................................................................................................................II绪论...................................................................................................................................................................1第一章悬架概述......................................................................................................................................21.1悬架设计的要求......................................................................................................................31.2悬架对汽车性能的影响......................................................................................................31.2.1悬架对汽车行驶平顺性的影响.........................................................................31.2.2悬架对汽车行驶稳定性的影响.........................................................................5第二章独立悬架及弹性元件的结构形式与分析.................................................................72.1独立悬架的结构型式与分析...........................................................................................72.2弹性元件的特定分析比较.................................................................................................8第三章螺旋弹簧悬架设计...............................................................................................................103.1悬架基本参数的选定.........................................................................................................103.1.1悬架静挠度.................................................................................................................103.1.2上下横臂长度的确定.............................................................................................113.1.3簧载质量的确定........................................................................................................113.1.4其他参数的确定........................................................................................................113.2螺旋弹簧的选择....................................................................................................................123.3减振器的选择.........................................................................................................................143.3.1减振器类型的选择.................................................................................................143.3.2减振器主要参数的选择.......................................................................................15何建勋：双横臂独立悬架设计3.4接头..............................................................................................................................................17谢辞.................................................................................................................................................................19参考文献......................................................................................................................................................20附录A外文翻译-原文部分...............................................................................................................21附录B外文翻译-译文部分.............................................................................................................33附录C实体图