【正文】 兩個(gè)力由驅(qū)動(dòng)橋承受。二是差速 器向兩邊半軸傳遞動(dòng)力的同時(shí)，允許兩邊 半軸以不同的轉(zhuǎn)速旋轉(zhuǎn)，滿足兩邊車輪盡可能以純滾動(dòng)的形式作不等距行駛，減少輪胎與地面的摩擦，延長車輪的壽命，保證汽車的行駛安全可靠。 設(shè)計(jì)驅(qū)動(dòng)橋就要先從工作特點(diǎn)和設(shè)計(jì)要求講起，還要對(duì)驅(qū)動(dòng)橋的各部分結(jié)構(gòu)，各結(jié)構(gòu)的作用有一定的要求，在這里就對(duì)驅(qū)動(dòng)橋的總成的組成和各組成結(jié)構(gòu)的布置方法進(jìn)行了全面的分析； 課題所設(shè)計(jì)的客車最高車速 V≥ 110km/h,發(fā)動(dòng)機(jī)最大功率 76kW（ 3800r/min），最大扭矩（ 2020r/min） 225 Nm 。本說明書將以“驅(qū)動(dòng)橋設(shè)計(jì)”內(nèi)容對(duì)驅(qū)動(dòng)橋及其主要零部件的結(jié)構(gòu)型式與設(shè)計(jì)計(jì)算一 一作介紹。應(yīng)該采用能用幾種典型零部件，以不同的方案組合的設(shè)計(jì)方法與生產(chǎn)方式來達(dá)到驅(qū) 動(dòng)橋產(chǎn)品的系列化的目的，力求做到將某一類型的驅(qū)動(dòng)橋以更多的零件，用到不同的性能、不同的噸位、不同的用途，且由單橋驅(qū)動(dòng)到多橋驅(qū)動(dòng)的諸多變形的汽車上。 關(guān)鍵詞： 輕型客車；驅(qū)動(dòng)橋；主減速器；差速器；車輪傳動(dòng)裝置；驅(qū)動(dòng)橋殼； Abstract Drive bridge as the one of four auto assembly ,Its performance directly affects the performance of the whole vehicle ,for passenger cars、 trucks is particularly important .When the engine power output larger torque In order to meet the current needs of various passenger car, truck the fast,high efficiency of different load , high efficiency needs,It must match a safe and reliable and high performance driving axle .The design of the bus driver bridge was referring to the drive axle of the traditional design method .This article first through the type and parameters of main ponents of search ,the structure and design parameters of the main ponents . After the reference to the similar driving axle structure, so as to determine the overall design scheme .Finally, check the strength of the main, driven bevel gear, differential plaary gear cone, a half axle gear, full floating axle and axle housing ,also check the bearing’s working life . Keywords: light bus . driving drive. drive axle housing . 目 錄 摘 要 ............................................................................................................................ I Abstract .......................................................................................................................... II 前 言 ........................................................................................................................III 第一章 驅(qū)動(dòng)橋的結(jié)構(gòu)方案設(shè)計(jì) ....................................................................................... 7 ........................................................................................................ 7 第二章 主減速器設(shè)計(jì) ..................................................................................................... 9 初步估算減速器傳動(dòng)比 ................................................................................... 10 主減速器的結(jié)構(gòu)形式 ...................................................................................... 10 主減速器的輪齒類型 .............................................................................. 10 主減速器的減速形式 .............................................................................11 主減速器的主、從動(dòng)錐齒輪的設(shè)計(jì) ........................................................11 主減速器基本參數(shù)選擇與計(jì)算載荷的確定 ....................................................... 13 主減速器傳動(dòng)比的確定 .......................................................................... 13 確定主減速器的載荷，用齒輪計(jì)算 ....................................................... 14 主減速器錐齒輪的強(qiáng)度計(jì)算 ............................................................................ 18 單位齒長圓周力 ................................................................................... 18 輪齒彎曲強(qiáng)度 ...................................................................................... 19 輪齒接觸強(qiáng)度 ...................................................................................... 21 第三章 差速器設(shè)計(jì) ...................................................................................................... 21 差速器的結(jié)構(gòu)形式選擇 ................................................................................... 22 差速器主要參數(shù)選擇 ...................................................................................... 23 行星齒輪數(shù) n ......................................................................................... 23 行星齒輪球面半徑 ................................................................................. 23 行星齒輪與半軸齒輪的齒數(shù) ................................................................... 24 行星齒輪與半軸齒輪節(jié)錐角與模數(shù) ......................................................... 24 分度圓直徑 ............................................................................................ 25 半軸齒輪齒面寬 ................................................................................... 25 齒 頂高 ................................................................................................... 25 壓力角 ................................................................................................. 25 差速器齒輪強(qiáng)度計(jì)算 ...................................................................................... 26 第四章 車輪傳動(dòng)裝置設(shè)計(jì) ............................................................................................ 27 車輪傳動(dòng) 裝置結(jié)構(gòu)的選擇 ............................................................................... 28 半軸的設(shè)計(jì)與計(jì)算 .......................................................................................... 28 初選直徑 ............................................................................................... 29 強(qiáng)度校核 ............................................................................................. 29 半軸的結(jié) 構(gòu)設(shè)計(jì)及材料與熱處理 ....................................................................... 30 第五章 驅(qū)動(dòng)橋殼設(shè)計(jì) ................................................................................................... 30 驅(qū)動(dòng)橋殼結(jié)構(gòu)方案分析 ..................................................................................... 31 驅(qū)動(dòng)橋殼強(qiáng)度計(jì)算 ............................