轻型汽车底盘前盘式后鼓式制动器设计

轻型汽车底盘前盘式后鼓式制动器设计THEDESIGNOFFRONTDISCBRAKEANDREARDRUMBRAKEFORLIGHTVEHICLECHASSIS2009年6月西南交通大学本科设计第I页摘要汽车作为陆地上的现代交通工具，由许多保证其使用性能的大部件，即所谓“总成”组成，制动系就是其中一个重要的总成。它既可以使行驶中的汽车减速，又可以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和停车的可靠性起着重要的保证作用。当今，随着告诉公路的不断发展、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。因为只有制动性能良好、制动系工作可靠的汽车才能发挥出其高速行驶的动力性能并保证行驶的安全性。另外，随着轻型载货汽车市场竞争的加剧，如何缩短产品开发周期、提高设计效率，降低成本等，已经成为主要的竞争手段。由此可见，制动系是汽车非常重要的的组成部分，从而对汽车制动系的结构分析与设计计算也就显得非常重要了。本文介绍了汽车制动系的发展状况及趋势、制动器的各种结构型式及选择、制动系的主要参数及其选择、制动器的设计计算、制动器主要零部件的结构设计与强度计算、制动驱动机构的结构型式选择与设计计算等。关键词：盘式制动器鼓式制动器西南交通大学本科设计第II页AbstractAutomobileasamodernland-basedtransport,toensurethattheirperformanceinmanymajorcomponents,namely,thecompositionofAssembly，thebrakingsystemisoneofthekeyassembly.Itcanbesoslowmovingvehicles,butalsotoensurethatafterparkingthecarcanbefixedinsitupresence.Thisshowsthatvehiclebrakingsystemforvehiclesafetyandreliabilityofparkingplaysanimportantroleintheguarantee.Today,withthecontinuousdevelopmentofhighway,theimprovementofvehiclespeedandtrafficdensity,vehiclebrakingsystemontheworkofthereliabilityrequirementsbecomeincreasinglyimportant.Becauseonlyvehiclesofgoodbrakingperformanceandreliablebrakingsystemtoplayitshigh-speeddynamicperformanceandtoensurethesafetyoftraveling.Inaddition,thelighttruckmarketwiththecompetition,howtoshortentheproductdevelopmentcycleandimprovedesignefficiency,reducecostsandsoon,hasbecomeamajormeansofcompetition.Thisshowsthatthebrakingsystemisveryimportantautomotivecomponents,thusthestructureofmotorvehiclebrakingsystemanalysisanddesignofthecalculationisveryimportant.Thispaperintroducesthedevelopmentofautomotivebrakingsystemstatusandtrends,brakesandthechoiceofstructure,themainparametersofbrakingsystemanditschoice,designandcalculationofbrake,themaincomponentsofthestructureofbrakedesignandstrengthcalculation,BrakedrivemechanismofthestructuretypeselectionanddesignofcomputingKeywords:DiscBrakeDrumbrake西南交通大学本科设计第III页目录第一章：绪论.......................................................................................................................11.1研究的目的和意义.................................................................................................11.2国内外研究现状发展趋势.....................................................................................1第二章：汽车总体参数的确定...........................................................................................82.1汽车型式的选择.....................................................................................................82.2汽车主要尺寸和参数的选择.................................................................................92.2.1汽车主要尺寸的确定..................................................................................92.2.2汽车质量参数的确定................................................................................102.2.3汽车性能参数的确定................................................................................122.2.4轮胎的选择................................................................................................12第三章：制动器的结构型式及选择.................................................................................143.1盘式制动器的结构型式及选择..........................................................................143.1.1固定钳式盘式制动器................................................................................153.1.2浮动钳式盘式制动器................................................................................163.1.3盘式制动器的优缺点................................................................................173.2鼓式制动器的结构型式及选择...........................................................................173.2.1领从蹄式制动器........................................................................................183.2.2双领蹄式制动器........................................................................................203.2.3双向双领蹄式制动器................................................................................203.2.4单向增力式制动器....................................................................................213.2.5双向增力式制动器....................................................................................21第四章：制动系的主要参数及选择.................................................................................234.1制动力与制动力分配系数...................................................................................234.2同步附着系数.......................................................................................................274.3制动强度和附着系数利用率...............................................................................284.4制动器最大制动力矩...........................................................................................294.5制动器因数........................................................................................................304.6鼓式制动器...........................................................................................................314.6.1鼓式制动器的结构参数............................................................................314.6.2摩擦片摩擦系数........................................................................................34西南交通大学本科设计第IV页4.7盘式制动器主要参数的确定............