搜索
汽车专业毕业论文---答辩通过极具参考价值本论文材料仅供参考学习，疑问可咨询文档贡献者。毕业设计(论文)题目轻型汽车底盘鼓式制动器设计i轻型汽车底盘鼓式制动器设计摘要：汽车作为陆地上的现代重要交通工具，由许多保证其性能的大部件，即所谓“总成”组成，制动系就是其中一个重要的总成，它直接影响汽车的安全性。随着高速公路的快速发展和车流密度的日益增大，交通事故也不断增加。据有关资料介绍，在由于车辆本身的问题而造成的交通事故中，制动系统故障引起的事故为总数的45%。可见，制动系统是保证行车安全的极为重要的一个系统。此外，制动系统的好坏还直接影响车辆的平均车速和车辆的运输效率，也就是保证运输经济效益的重要因素。制动系既可以使行驶中的汽车减速，又可保证停车后的汽车能驻留原地不动。由此可见，汽车制动系对于汽车行驶的安全性，停车的可靠性和运输经济效益起着重要的保证作用。当今，随着高速公路网的不断扩展、汽车车速的提高以及车流密度的增大，对汽车制动系的工作可靠性要求显得日益重要。只有制动性能良好和制动系工作可靠的汽车才能充分发挥出其高速行驶的动力性能并保证行驶的安全性。由此可见，制动系是汽车非常重要的组成部分，从而对汽车制动系的机构分析与设计计算也就显得非常重要了。论文中采用的是前鼓后鼓的制动系方案并且前轮采用双领蹄式制动器，后轮采用领从蹄式制动器，兼顾了制动器效能因数和制动器效能的稳定性。它的工作原理是利用与车身(或车架)相连的非旋转元件和与车轮(或传动轴)相连的旋转元件之间的相互摩擦来阻止车轮的转动或转动的趋势，亦即由制动踏板的踏板力通过推杆和主缸活塞，使主缸油液在一定压力下流入轮缸，并通过两轮缸活塞推使制动蹄绕支承销转动，上端向两边分开而以其摩擦片压紧在制动鼓的内圆面上。不转的制动蹄对旋转制动鼓产生摩擦力矩，从而产生制动力，使车轮减速直至停车。论文第一章介绍了汽车制动系发展情况和制动系统的组成。第二章主要讲述了汽车的总体设计。第三章讲述了鼓式制动系的主要形式及其方案的选取。第四章分析计算了制动器制动过程中动力学参数的计算。第五章讲述了鼓式制动器的结构参数和主要零部件的设计。第六章是关于鼓式制动器的设计计算。第七章是制动器驱动机构的设计与计算。第八章是鼓式制动器主要零部件的强度分析。关键词：鼓式制动器；驱动机构；制动参数ii轻型汽车底盘鼓式制动器设计AbstractAsanimportantmodernland.basedtransport,Automotivecomponentsfrommanylargeparts,namely,theso.calledassemblywhichensuretheperformanceofautomotive,andbrakingsystemwhichdirectlyaffectsthesafetyofmotorvehiclesisoneofthemostimportantassembly.Withtherapiddevelopmentofhighwaysandincreasedtrafficdensity,trafficaccidentsarealsoincreasing.Accordingtotheinformationonthevehicleitselfasaresultofproblemscausedbytrafficaccidents,thebrakesystemfailurecausedtheaccidentaccountingforthetotalnumberof45%.Sobrakingsystemisanextremelyimportantsystemtoensuretrafficsafety.Inaddition,thebrakingsystemhasadirectimpactonthequalityoftheaveragevehiclespeedandvehicletransportationefficiency,thatis,animportantfactorensuringcost.effectivetransport.Itnotonlycanslowdownamovingvehicle,butalsotoensurethatthecarcanbefixedinsituafterparking.Thisshowsthatthevehiclebrakingsystemplaysanimportantroleintrafficsafety,thereliabilityofparking,andtransporteconomicefficiency.Today,withever.expandinghighwaynetwork,theimprovementofvehiclespeedandtrafficdensity,ontheworkofautomotivebrakingsystemreliabilityrequirementsbecomeincreasinglyimportant.Onlyvehicleswhichhavegoodbrakingperformanceandreliablebrakingsystemcangivefullplaytotheirhigh.speeddynamicperformanceandtoensurethesafetyoftraveling.Thisshowsthatthebrakingsystemisaveryimportantcomponentofthevehicle,thusit’sveryimportanttotheanalysisanddesignofbrakesystembodies.Paperusedbrakeprogramofthebrakedruminfrontandbehind.Frontwheelusedduo.duplexdrumbrakesandbehindwheelsimplexdrumbrakes,whichtakesintoiiiaccounttheeffectivenessofthebrakesandbrakeperformancefactorofstability.Itsworkingprincipleistousewiththebody(orframe)associatedwithnon.rotatingcomponentsandthewheel(orshaft)connectedtotherotatingcomponentsoffrictionbetweenthewheelstopreventthetrendofturningorrotating,namelybythepedalforceofbrakepedalpassingthroughthepushrodandthemastercylinderpiston,makingmastercylinderoilinflowwheelcylinderunderacertainpressure,andpushingthroughthetwo.cylinderpistonbrakeshoesothatrotatingaroundthebranchmanagers,thetopseparatelytobothsidespressedinitsfrictionplatebrakedrumsurfaceoftheinnercircle.Non.rotatingbrakeshoeproducedfrictiontorquetorotatingdrumbrakeresultinginbrakingforcetoslowdownuntilthewheelsstop.Thefirstchapterofthispaperdescribesthedevelopmentofautomotivebrakingsystem.ChapterIIfocusesontheoveralldesignofthecar.ChapterIIIisaboutthemainformandprogramselectionofthedrumbrake.ChapterIVisaboutanalysisandcalculationofkineticparametersofthebrakeduringbrakingprocess.ChapterVdescribedthestructureofdrumbrakecomponentsandthedesignofthemainparameters.ChapterVIdescribeddesignandcalculationofdrumbrake.ChapterVIIisabouttheanalysisandcalculationofdrumbrakedrivemechanism.ChapterVIIIisaboutstrengthcheckingonthemaincomponentsofdrumbrake.:DrumbrakeDrivemechanismBrakeParametersiv目录1绪论................................................................11.1汽车制动系统的发展概况..........................................11.2汽车制动系统的组成..............................................12汽车总体参数的选择及计算.......................................32.1总体设计应满足的基本要求.......................................32.2汽车形式的确定..................................................42.3汽车质量参数的确定..............................................52.4汽车主要尺寸的确定..............................................62.5汽车性能参数的确定..............................................92.6发动机的选择....................................................92.7轮胎的选择.....................................................143鼓式制动器的方案选择...........................................163.1鼓式制动器的结构形式..........................................163.1.1领从蹄式制动器...........................................173.1.2单向双领蹄式制动器.......................................203.1.3双向双领蹄式制动器.......................................213.1.4双从蹄式制动器...........................................223.1.5单向增力式制动器.........................................223.16双向增力式制动器..........................................233.2鼓式制动器方案的确定...........................................243.2.1制动效能因素......................................