4座微型客貨兩用車設(shè)計（車架及制動系設(shè)計）說明書.doc

車輛與動力工程學(xué)院畢業(yè)設(shè)計說明書I4座微型客貨兩用車設(shè)計（車架、制動系設(shè)計）摘要汽車制動系是保證汽車及駕駛者生命安全的重要部分，制動系是使行進(jìn)中的汽車減慢速度或者停止運(yùn)動。這次我的畢業(yè)設(shè)計題目是4座微型客車設(shè)計（車架、制動系設(shè)計）。在第二章我主要介紹了制動系的概況和設(shè)計時應(yīng)滿足的基本要求。第三章主要是制動系的類型及最后確定的方案，其中列出了幾種可供選擇的類型并進(jìn)行了分析、比較最后確定的方案如下：行車制動器：前鼓后鼓，前鼓式制動器為雙領(lǐng)蹄式制動器，后鼓式制動器為領(lǐng)從蹄式制動器。第五章主要介紹了制動系主要結(jié)構(gòu)參數(shù)的選擇并進(jìn)行了簡單的計算，是本設(shè)計說明書的核心部分，其中包括鼓式制動器主要結(jié)構(gòu)參數(shù)的選擇，例如：制動鼓內(nèi)徑、摩擦襯片寬度和包角、摩擦襯片起始角，同時對制動力和制動力矩分配系數(shù)進(jìn)行了計算。第四章主要對駐車制動和應(yīng)急制動進(jìn)行了簡單的計算。第五章介紹的是制動器主要零件的結(jié)構(gòu)設(shè)計，如制動鼓、制動蹄、制動底板和制動輪缸等。第七章包括制動驅(qū)動機(jī)構(gòu)的選擇和計算，制動管路的分路系統(tǒng)和液壓驅(qū)動機(jī)構(gòu)的設(shè)計和計算。第八章列出了車架的幾種類型，分析比較之后，最后確定選用前窄后寬的邊梁式車架，并且在這一章中對車架的彎曲強(qiáng)度進(jìn)行了計算，對車架的剛度進(jìn)行了校核。通過這一系列的分析、計算、校核等，這套設(shè)計方案是可行的。關(guān)鍵詞：制動系統(tǒng)，鼓式制動器，應(yīng)急制動，車架車輛與動力工程學(xué)院畢業(yè)設(shè)計說明書IITHEDESIGNOF4SEATSMINIDUAL-USECAR(THEDESIGNOFFRAMEANDBRAKESYSTEM)ABSTRACTThebrakesystemisanimportantparttokeepsafetyforautomobile,thepurposeofthebrakingsystemistoslowdownandstopthemovingautomobile.Mytopicinthisgraduationdesignisthedesignofframeandthebrakesystem.Insecondchapterwemainlyintroducedsomethingaboutthebrakesystemandsomerequestswhichthebrakesystemshouldsatisfied.Thethirdchaptermainlyintroducedthetypeofthebrakesystemandfinallydeterminedtheplan,inthischapterwelistedseveralkindstochoose,atlastwedeterminedtheplanthroughanalysisandcomparewithasfollows:Intravelingbrakesystem,theformerwheelsandtherearwheelsaredrumbrake.Thedrumtypebrakeforcollarfromfootbrake.Thefourthchaptermainlyintroducedthemaindesignparameterschoiceandhascarriedonthesimplecomputation,andthischapteristhemostimportantpart.Includingdrumtypemaindesignparameterchoice,Forexample:Thebrakedruminsidediameter,thewidth,theangleandtheoutsetangleandsoon,simultaneouslyhavecarriedonthecomputationtothebrakestrengthandthebrakingmomentdistributioncoefficient.Thefifthchaptermainlysaidthevehicletobrakeonstoppingandmomentarythroughsimplecomputation.Thebrakemajorpartsstructuraldesign,likebrakedrumandbrakewheelcylinderandsoonweredesignedinthesixthchapter.Seventhchapterincludingappliesthebrakethedrivingmechanismchoiceandthecomputation,thebrakelineby-pass車輛與動力工程學(xué)院畢業(yè)設(shè)計說明書IIIsystemandthehydraulicpressuredrivingmechanismdesignandthecomputation.Eighthchapterhaslistedtheframeseveralkindoftypes,aftertheanalysiscomparison,afterfinallyfrontdeterminedselectsthenarrowwidthsidebeamplateframe,Andhascarriedonthecomputationinthischaptertotheframebendingstrength,hascarriedontheexaminationtotheframerigidity.Throughthisaseriesofanalysis,computation,examinationandsoon,thissetofdesignproposalisfeasibleKEYWORDS:brakesystem,drumbrake，emergencybrake,frame車輛與動力工程學(xué)院畢業(yè)設(shè)計說明書IV常用符號表BF制動器因數(shù)BF汽車承受的總地面制動力，NfF汽車制動器制動力，NF輪胎與地面間的附著力，Nf制動器摩擦副的摩擦系數(shù),aGG汽車重力，Ng重力加速度,m/s2gh汽車質(zhì)心高度,mmj制動減速