制动器外文翻译 车主减速器的对比分析与设计

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1、本科生毕业设计（论文）外文翻译毕业设计（论文）题目：汽车主减速器的对比分析与设计外文题目：AUTOMOTIWEFINALDRIVE译文题目：汽车主减速器学生姓名：专业：车辆工程指导教师姓名：评阅日期：AUTOMOTIWEFINALDRIVEFINALDRIVEAfinaldriveisthatpartofapowertransmissionsystembetweenthedriveshaftandthedifferential.Itsfunctionistochangethedirectionofthepowertransmittedbythedriveshaftthrough90d

2、egreestothedrivingaxles.Atthesametime.itprovidesafixedreductionbetweenthespeedofthedriveshaftandtheaxledrivingthewheels.Thereductionorgearratioofthefinaldriveisdeterminedbydividingthenumberofteethontheringgearbythenumberofteethonthepiniongear.Inpassengervehicles,thisspeedreductionvariesfromabou

3、t3:1to5:1.Intrucksitvariesfromabout5:1to11:1.Tocalculaterearaxleratio,countthenumberofteethoneachgear.Thendividethenumberofpinionteethintothenumberofringgearteeth.Forexample,ifthepiniongearhas10teethandtheringgearhas30(30dividedby10),therearaxleratiowouldbe3:1.Manufacturersinstallarearaxleratio

4、thatprovidesacompromisebetweenperformanceandeconomy.Theaveragepassengercarratiois3.50:1.Thehigheraxleratio,4.11:1forinstance,wouldincreaseaccelerationandpullingpowerbutwoulddecreasefueleconomy.Theenginewouldhavetorunatahigherrpmtomaintainanequalcruisingspeed.Theloweraxleratio.3:1,wouldreduceacc

5、elerationandpullingpowerbutwouldincreasefuelmileage.Theenginewouldrunatalowerrpmwhilemaintainingthesamespeed.Themajorcomponentsofthefinaldriveincludethepiniongear,connectedtothedriveshaft,andabevelgearorringgearthatisboltedorrivetedtothedifferentialcarrier.Tomaintainaccurateandproperalignmentan

6、dtoothcontact,theringgearanddifferentialassemblyaremountedinbearings.Thebeveldrivepinionissupportedbytwotaperedrollerbearings,mountedinthedifferentialcarrier.Thispinionshaftisstraddlemounted.meaningthatabearingislocatedoneachsideofthepinionshaftteeth.Oilsealspreventthelossoflubricantfromthehous

7、ingwherethepinionshaftandaxleshaftsprotrude.Asamechanic,youwillencounterthefinaldrivegearsinthespiralbevelandhypoiddesign.SpiralBevelGearSpiralbevelgearshavecurvedgearteethwiththepinionandringgearonthesamecenterline.Thistypeoffina