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毕业设计论文外文翻译系(部)机电信息系专业机械设计制造及其自动化班级学生学号指导教师20012年3月2日外文原文AutomotivesubactuatorstoothsideclearanceadjustmentoptimizationtechniquesAurelianVadean,DimitriLeray,JeanGuillotAdepartmentofMechanicalEngineering,EcolePolytechniquedeMontreal,P.O.Box6079,StationCentreVille,Montreal,Québec,CanadaH3C3A7BlaboratoiredeGenieMecaniquedeToulouseCOSAM,INSAToulouse,135AvenuedeRangueil,ToulouseCedex4,31077,FranceAbstractautomotivesubactuatormaingeargapanalysisandresearch,drawnshelladjustingshimthicknesssplitterassemblyperformanceimpactofsubstance.Basedontherelativemeasurementprincipledevelopedsubactuatorshellbearingtheadjustmentshimspreselectionsystem,analysisofthemeasurementdataanduncertaintyassessment.Practicehasprovedthatthesystemcaneffectivelyselecttheappropriategasketmeetpairingarcgearassembly,improveproductionefficiency,andqualityofassembly,thekeyprocessfortheproductionofautomotivesubactuatortoprovideareliableguarantee.Isobasicskillswiththepoweremittedbytheenginetothedrivewheelsofthecar,itsprimarytaskistoworktogetherwiththecarengine,inordertoensurethatthecarinnormaldrivingunderdifferentconditionsofuse,andhasgoodpowerandfueleconomy.AutomotivesubactuatorsUsuallybytheclutch,transmission,universaltransmissionandmainreducer,differentialandaxleshafts.1IntroductionAutomotivesubactuatorsmountedonthetransmissionofmultibridgedriverfortransmissionanddistributionofpowertoeachdriveaxle,doublesastheuseofauxiliarytransmission.S504subactuatorsusingspiralbevelgear.ThethearcgearVicebacklashsubactuatorlifetodriveoneofthekeyfactorofstability.Thegapistoolarge,thegearboxwillproducenoise,vibrationcontrary,willaggravatethewearofteeth,appearedgearkilledeventeethbroken1.Carusuallyusedtheaxialshimadjustmentmethodtoadjustthetoothsidegap,Figure1isavehiclemasterteethinstallationpositiondiagram,thecarstarsActivityASSYassemblyprocess,apairofgearsmeshingaccuracyisthroughaseriesoftolerancebanddifferent,theadjustingwasherofahighsurfacefinishistobeguaranteed.Gasketheightandflatnessofsmallchanges,allwillhaveatremendousimpactontheefficiencyandlifeofthesubactuators.Subactuatorsonthedomesticautoassemblylineincludingforeignautopartsenterprisesinsomebranchmaingearassemblyassemblyismainlydependentontheexperienceoftheworkers,byhand,totheseatofyourpantsselectadjustingshim,itsproductionlowefficiency,highfailurerates,andassemblyqualityisdifficulttoguarantee.Aftercarefulanalysisoftheproblemsofthetraditionalassemblymethods,S504pointsbasedonthemovingassemblyassemblyprocess,accordingtotherequirementsoftheprocessquality,designthecasebearingadjustmentshimspreselectionmachine.ThepreselectioniscapableofaccuratelymeasuringtheS504subactuatorstoothinstallationsize,position,andthusthebestadjustmentshimsvalueelectedguaranteegearsmeshingaccuracy.Theroleofthecardantransmissionapparatusisconnectedtothetransmissionoutputshaftarenotinthesamestraightlineandthemaingearboxinputshaft,andtoensurethatinthecaseoffrequentlychangingtheangleandthedistancebetweentheaxesofthetwopowertransmissionreliably.Itiscomposedmainlybyuniversaljoints,driveshaftandintermediatesupport.Theinstallationmustbethedriveshaftatbothendsoftheuniversaljointforkinthesameplane.MainreducercarIsoreducespeedandincreasethetorqueofthemaincomponents.Onthetheenginelongitudinalautomotive,mainreducerbevelgeardrivetochangethemomentumdirection.Whenthenormaldrivingofthevehicle,theenginespeedisusuallyabout2000to3000r/min,ifthesuchahighspeedrelygearboxtolowerdown,thenthepairofgearsinthegearboxtransmissionrationeedgreat,andthegearpairsofthetransmissionTheradiusratioofthetwogearsthegreaterthelargertheratio,inotherwords,thesizeofthetransmissionwillbegreater.Inaddition,thespindowntorqueinevitablyincrease,andwillincreasethetransmissionloadofthegearboxandgearboxafteratransmissionmechanism.Therefore,thedifferentialinpowertothedrivewheelstotheleftandrightshuntbeforesettingamaingearbox,drivecomponentssuchasthegearbox,thesplitterinfrontofthemaingearboxcanbeuniversaltransmissiontorquetransmittedisreduced,youcanalsomakethesizeofthegearbox,thereducedmass,manipulationandeffort.Whentheturningofthevehiclewhentraveling,andthedistanceoftheleftandrightwheelsatthesametimerollingacrossdifferent,Ifbothsidesofthedrivewheelsonlytotherootrigidshaftdrive,thetwoangularvelocitymustbethesame,thus,whenthevehicleiscorneringwillinevitablyproducethewheelsrelativetothegroundsurfaceslidephenomenon.Thiswillenablethesteeringdifficulties,theautomobilepowerconsumptionisincreased,andacceleratedwearofcertainpartsandthetireofthesubactuator.Therefore,weneedwithinthedriveaxlememberdifferentialdevicehavingadifferentialaction,andsothatbothleftandrightdrivewheelscanberotatedtodifferentangularvelocities.Thus,theautomotivesplitterreasonabledesignisveryimportant.Automotivesubactuatordesign,mainlythroughexperiencedesigncalculatedcrossshaftuniversaljoints,driveshaft,finaldrive,differentialvariouspartsofthemainselectionanddesignofstructuralparameters,andthenbyhandtomapoutthetwodimensionaldrawingsofthecrossshaftuniversaljoints,driveshaft,themainreductiongear,differential,etc.,theproducttrialdesignandputintoprocessoftenproblemstogothroughalotofchanges,whichmakestheperformanceoftheproductsandthereisnoguaranteethatthequalityandlongproductdevelopmentcycle,andtheuseofhumanandmaterialresources,resultinginthedesignanddevelopmentcostsarerelativelyhigh.,Theincreasinglyfiercecompetitioninthemarketeconomymechanism,thisdesignapproachhasbeenfarfrommeeting.Therefore,motivatedrapiddevelopmenttrendofcomputertechnology,theapplicationofcomputertechnologytothedevelopmentofprofessionalsoftwareisusedinmoreandmore,andmorewidelyinthedevelopmentanddesignofavarietyofproducts.Entitiesofautomotivesubactuatordesigncannowdrawrelevantparametersdirectlyusingthreedimensionalmappingsoftwaretovariouspartsofclutchthreedimensionalsolidmodeling,assembly,soyoucanbethreedimensionaltovisuallyseethedesignofautomotivesubactuatorstheperformanceoftheproductdevelopmentanddesigntomaketheoptimalpurpose.Thiscomputerthesoftwareaideddraftingnotonlyshortentheproductdevelopmentcycle,butalsoimprovethequalityoftheproduct,andgreatlyreducethecostofproductdevelopment,sothatwillmakeourproductsmorecompetitiveinthefiercecompetitioninthemarketeconomy.2SystemdesignideasS504movingassemblystructureanalysis,theTheIsoshellsidebearingadjustingshimroletoensurethethedrivengearinstallationofcenterdistance,adjustthesideteethmeshinggap.AccordingtotheirstructuralformFigure2,toestablishthesizeofthechainasfollowsAdjusttheshimthicknessAmongA1theshellwithsubactuatorscoverthejointsurfacetothesplittershellgearshaftgearendbearingaxialpositioningsurfacedistanceA2theshellwithsubactuatorcoveracombinationofthedistancefromthesurfacetothemaingearshaftaxisA3dorsaltoothtotheteethenddistanceofthebearingouterringface,thatbearinghightotal52.3Unitmmthetheoryofdrivengearisinstalledfromthe.Intheoverallsizeofthechain,adjusttheshimstocompensateforthering.Whenassembled,therollingbearinginthepreloadstate,andadjustingthemain,theaxialpositionofthegear,sothatthecontactspotsofassemblyrequirements2.Thus,intheLateralcontainmentpadshimsofappropriatethickness,hasacrucialroletoensuretheperformanceoftheentiresubactuator.Accordingtothesplitterthetoothassemblyprocessrequirements,combinedwiththespecificstructureoftheDUTrelativemeasurementmethodFigure3,whichuseshighprecisiondisplacementsensortomeasuretheobjectAcalibration,readoutthesensorcompressionTheamountmeasurementoftheobjectBDUT,readoutofthesensortheamountofcompression,compresseddifferencebetweentheamountofthetwomeasurements,toarriveattheheightoftheworkpiece,whichismeasuredbythehighprecisionmeasuringinstruments3.Suchmeasurementmethodhasasmallrange,highaccuracy,zeroadjustablebytheambienttemperaturechangesaffectsmalladvantages.3SystemConstructionandAnalysis3.1Constructionandmeasurementcapabilities
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