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宝来轿车前轮制动器设计说明书[带图纸].doc

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宝来轿车前轮制动器设计说明书[带图纸].doc

题目宝莱轿车前轮制动器设计姓名班级学号指导教师摘要I摘要汽车制动系的基本功用是使行驶中的汽车减速或停车,在下坡行驶的汽车的车速保持稳定以及使已停驶的汽车在原地或坡道上驻留不动的机构。汽车制动系直接影响着汽车的安全性和停车的可靠性。随着高速公路的迅速发展和车速的提高以及车流密度的日益增大,为了保证行驶安全、停车可靠,汽车制动系的工作可靠性显得日益重要。也只有制动性能良好、制动系工作可靠的汽车才能充分发挥其动力性能。汽车的制动系是汽车行车安全的保证,许多制动法规对制动系提出了许多详细而具体的要求,这是我们设计的出发点。从制动系的功用及设计的要求出发,依据给定的设计参数,进行方案论证。对各种形式的制动器的优缺点进行了比较后,选择了前盘后鼓的形式。这样既保证了较高的制动效能又有很好的稳性。关键词制动系制动盘摩擦块制动效能AbstractIIAbstractTheautomobilebrakingsystembasicfunctioniscausesinthetraveltheautomobiletodecelerateortostop,stabilizesaswellascausesalreadytheautomobileinthedownhilltravelautomobilevehiclespeedmaintenancewhichstopstripsinkeepsthemotionlessorganizationoninsituortheslopeway.Theautomobilebrakingsystemdirectlyisaffectingthereliabilitywhichtheautomobilesecurityandstops.Increasedaybydayalongwiththehighwayrapiddevelopmentandthevehiclespeedenhancementaswellasthestreamofvehiclesdensity,inordertoguaranteethetravelissafe,stopsreliably,theautomobilebrakingsystemoperationalreliabilityappearsdaybydayimportantly.Alsoonlythebrakingqualitytobegood,thebrakingsystemworkreliableautomobilecanfullydisplayitspowerperformance.Theautomobilebrakingsystemistheautomobiletrafficsafetyguarantee,manyappliedthebrakethelawsandregulationstoproposetothebrakingsystemmanydetailedandconcreterequest,thiswasastartingpointwhichwedesigned.Embarksfromthebrakingsystemfunctionandthedesignrequest,thebasisassignsthedesignvariable,carriesontheplanproof.Hascarriedonthecomparisonaftereachkindofformbrakegoodandbadpoints,afterhaschosenthemorningmarketthedrumform.Likethisbothhadguaranteedhigherappliesthebrakethepotencyandtohavetheverygoodstability.KeywordsBrakingsystemBrakediscDragblockBrakingquality目录1目录摘要...............................................................................................................................IAbstract................................................................................................................................II第1章绪论......................................................................................................................31.1汽车制动系概述...........................................................................................................31.2汽车制动器的工作原理...............................................................................................51.3毕业设计的目的和意义...............................................................................................6第2章制动器结构型式及选择......................................................................................82.1鼓式制动器的结构型式及选择...................................................................................82.2盘式制动器的结构型式及选择...................................................................................92.2.1定钳盘式制动器.....................................................................................................................102.2.2浮钳盘式制动器.....................................................................................................................122.2.3全盘式制动器.........................................................................................................................122.3盘式和鼓式制动器比较.............................................................................................13第3章制动系的主要参数及其选择............................................................................153.1制动力与制动力分配.................................................................................................153.1.1制动时前、后轮的地面法向反作用力..................................................................................153.1.2前、后制动器制动力的理想分配曲线..................................................................................173.2具有固定比值的前、后制动器制动力与同步附着系数.........................................193.3制动器的制动力矩.....................................................................................................203.4利用附着系数与制动效率.........................................................................................21第4章制动器的设计计算............................................................................................244.1原始数据和技术参数.................................................................................................244.2参数选择以及数据计算.............................................................................................244.2.1盘式制动器主要参数的确定.................................................................................................244.2.2摩擦块磨损均匀性验证.........................................................................................................254.2.3紧急制动时前后轮法向反力及附着力距..............................................................................254.2.4同步附着系数的确定.............................................................................................................264.2.5制动器的效率.........................................................................................................................274.2.6制动力矩以及盘的压力.........................................................................................................274.2.7同步附着系数的验算.............................................................................................................284.2.8摩擦衬块的磨损特性的验算.................................................................................................28第5章制动驱动机构的结构型式选择与设计计算....................................................295.1制动驱动机构型式.....................................................................................................295.1.1简单制动系...........................................................................................................................295.1.2动力制动系...........................................................................................................................295.1.3伺服制动系............................................................................................................................305.2分路系统.....................................................................................................................315.3液压制动驱动机构的设计计算.................................................................................325.3.1制动轮缸直径d的确定.........................................................................................................325.3.2制动主缸直径do的确定.......................................................................................................325.3.3制动踏板力Fp......................................................................................................................33目录25.3.4制动踏板工作行程Sp........................................................................................................33总结............................................................................................................................35参考文献............................................................................................................................36致谢.............................................................................................................................37

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