外文翻译--鼓式制动器

《外文翻译--鼓式制动器》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。

1、中文4800字DrumbrakeAdrumbrakewiththedrumremovedasusedontherearwheelofacarortruck.Notethatinthisinstallation,acable-operatedparkingbrakeusestheserviceshoes.Adrumbrakeisabrakeinwhichthefrictioniscausedbyasetofshoesorpadsthatpressagainstarotatingdrum-shapedpartcalledabrakedrum.Theterm"drumbrake"us

2、uallymeansabrakeinwhichshoespressontheinnersurfaceofthedrum.Whenshoespressontheoutsideofthedrum,itisusuallycalledaclaspbrake.Wherethedrumispinchedbetweentwoshoes,similartoaconventionaldiskbrake,itissometimescalleda"pinchdrumbrake",althoughsuchbrakesarerelativelyrare.Arelatedtypeofbrakeusesaf

3、lexiblebeltor"band"wrappingaroundtheoutsideofadrum,calledabandbrake.History8AdrumbrakeattherearwheelofamotorbikeKawasakiW800Themodernautomobiledrumbrakewasinventedin1902byLouisRenault,thoughaless-sophisticateddrumbrakehadbeenusedbyMaybachayearearlier.Inthefirstdrumbrakes,theshoesweremechanic

4、allyoperatedwithleversandrodsorcables.Fromthemid-1930stheshoeswereoperatedwithoilpressureinasmallwheelcylinderandpistons(asinthepicture),thoughsomevehiclescontinuedwithpurely-mechanicalsystemsfordecades.Somedesignshavetwowheelcylinders.Theshoesindrumbrakesaresubjecttowearandthebrakesneededto

5、beadjustedregularlyuntiltheintroductionofself-adjustingdrumbrakesinthe1950s.Inthe1960sand1970sbrakedrumsonthefrontwheelsofcarsweregraduallyreplacedwithdiscbrakesandnowpracticallyallcarsusediscbrakesonthefrontwheels,withmanyofferingdiscbrakesonallwheels.However,drumbrakesarestilloftenusedforh

6、andbrakesasithasprovenverydifficulttodesignadiscbrakesuitableforholdingacarwhenitisnotinuse.Moreover,itisveryeasytofitadrumhandbrakeinsideadiscbrakesothatoneunitservesasbothservicebrakeandhandbrake.Earlytypebrakeshoescontainedasbestos.Whenworkingonbrakesystemsofoldercars,caremustbetakennotto

7、inhaleanydustpresentinthebrakeassembly.TheUnitedStatesFederalGovernmentbegantoregulateasbestosproduction,andbrakemanufacturershadtoswitchtonon-asbestoslinings.Ownersinitiallycomplainedofpoorbrakingwiththereplacements;however,technologyeventuallyadv