搜索
毕业设计外文翻译:PatentedJan.2,19452,3669272UNITEDSTATESPATENTOFFICE2,366,272CRANKPRESSRobertG.LeTourneau,Peoria,Ill.,assignortoR.G.LeTourneau,Inc.;Stockton,Calif.,acorporationofCaliforniaApplicationJuly13,1943,SerialNo.494,5867Claims.(C1.100-70)Thisinventionrelatestoheavy-dutypresses,preferablyoftheverticalramtype;anobjectbeingtoprovideamechanismforoperatingtheramwhichincludesasinglethrowcrankshaft,andmeansforimpartingrotationtothecrankshaftfrombothendsandatrelativelyopposedpointssimultaneously.Bysodoing,Igreatlyreducethetorqueloadotherwiseplacedonthecrankshaftifthepowerisappliedtooneendonlyoftheshaft.Thisnewarrangementalsopermitsoftheuseofasmallercrankshafttotransmitagivenpowerthancannowbeemployed,withacorrespondingreductioninmanufacturingcosts.Thecrankshaftoperatingmechanismincludesapairofsynchronizedelectricmotors,withclutchandbrakeunitsinterposedbetweenthemotorandshaft.Anotherobjectoftheinventionistocontroltheclutchesandbrakessothatthebrakesareappliedautomaticallyastheclutchesarereleasedandalsosimultaneouslywithsuchreleasing.Inthismannerinstanthaltingofthecrankshaftandtheramisaccomplishedwithoutanycoastingandwithoutstoppingthemotors.Afurtherobjectoftheinventionistoprovideasimpleandinexpensivedevice,andyetonewhichwillbeexceedinglyeffectiveforthepurposeforwhichitisdesigned。TheseobjectsIaccomplishbymeans,ofsuchstructureandrelativearrangementofpartsaswillfullyappearbyaperusalofthefollowingspecificationandclaims.Inthedrawingssimilarcharactersofreferenceindicatecorrespondingpartsintheseveralviews:Figure1isasideelevationoftheupperportionofmyimprovedpress.Figure2isafragmentarysectionalelevationofthepress,showingtheramanditsconnectingrodatthetopofthestroke.Figure3isanenlargedfragmentarycrosssectionon,theline3-3ofFig.1.Figure4isadiagramofthedrivingconnections.betweenthemotorsandthecrankshaft.Referringnowmoreparticularlytothecharactersofreferenceonthedrawings,thepresscomprisesanupstandingcolumn1ofrectangularformandcrosssectionandwhichincludesverticalendplates2.Aworksupportingbed3isdisposedatthebottomofthecolumnwhichisopenbetweenendplatesforacertaindistanceabovethebed.Disposedinthecolumnisahollowrectangularplungeror4,onthelowerendofwhichasuitabledieholderHismounted.Theramisslidablyengagedonallsidesbyupperandlowersetsofadjustablewearplates5,thelowersetbeinglocatedinaplaneadjacentthelowerendoftheramwhenthelatterisatthetopofitsstroke,asshowninFig.2.Acrankshaft6havingasinglecrank7isdisposedabovethecolumnwithitscrankcentrallyoftheram;thecrankshaftbeingjournaledinbearings8whicharerigidwithtransverseplates9securedagainsttheupperportionsoftheendplates2.Aconnectingrod10engagesthecrankanddependsintotheramfromtheupperendthereof,therodbeingconnectedatitslowerendwiththerambymeansofacrosspin11mountedinthelatterintermediateitsends.Thepinissealedatitsendsintheram,asshown,andacrosswall12closestheramashortdistancebelowthepinsoastoformanoiltightsump13aboutthepinandthelowerendoftheconnectingrodinwhichasupplyoflubricantmaybemaintained.Bullgears14aremountedontheendsoftheshaft6beyondthebearings8,beingenclosedinhousings15securedasaunitInconnectionwiththeplates9andtheupperportionofthecolumn1.Eachgearisengagedbyapinion16ononesideandnearthebottom,asshowninFig.3,thepinionsofthetwogearsengagingthesameinopposedrelationoronoppositesides,asindicatedinFig.4.Eachpinionisfixedasaunitwithagear17whichinturnmesheswithanotherpinion18,eachgearandpinionunitbeingenclosedinanauxiliaryhousing19securedonthecorrespondinghousing15.Amotor20drivesthepinion18,themotorsofthetwopinionsbeingsynchronizedwitheachother.Allthepinionsandgearsarehelicallycut,thehelixanglesbeingopposedonthetwosetsofgears,asindicatedinFig.4.Anairoperatedclutch21ofsuitabletype,suchasthatshowninthepatenttoO.R.PetarsonandFredH.Stevens,No.2,351,876,datedJune20,1944,isinterposedintheshaftline22ofeachmotorandthecorrespondingpinion18;theclutchmembernearestthepinionbeingarrangedasaunitwithasuitablebrake23ofthespring–engagedandair-releasedtype.Eachclutchandbrakeunitismountedinahousing24projectingoutwardlyfromtheupperportionofthecorre-spondinghousing19,asshowninFig.1;thecor-respondingmotorinturnbeingsecuredagainsttheouterendofhousing24.Inordertosteadytheconstantlyturningmotorsastheyarealter-natelyplacedunderandrelievedofloadbycorrespondingclutchorde-clutchingoperations,theshaftofeachmotorisprovidedatitsouterendwithafly-wheel25,whichalsoprovidesreservepowerwhentheramisunderheavyload.Itisdesirablethattherotationofbothgears14shallstopsimultaneouslyandinstantlyandwithoutanycoastingwhenthemotorsaredisconnectedfromdriving,relationwiththe-pinions18byade-clutchingaction.TothisendIprovidethefollowingarrangement:Theairfeedlines26tobothclutchesareconnectedtoacommonconduit27,andlikewisetheairfeedlines28tobothbrakereleaseaircylindersareconnectedtoacommonconduit29.Theconduits27and29connectincommonwiththeoutletofasuitableairvalve30.Bythisarrangementtheclutchesareengagedandthebrakesarereleasedwhenthevalveisturnedtoplaceconduits21and29incommunicationwiththeairfeedline31.Whenthevalveisturnedtoplaceconduits27and29incommunicati