【正文】 As one of main ponent of vehicle drive line, its basic effect is to enlarge the torques that es from the drive shafts or directly from the transmission, and distributes the torques to side wheels, and make the side wheels have the differential drive axle has an important effect on vehicle performance, therefore, we should keep a serious and earnest attitude during the course of design.In the exordium part, it has short and sweet introduced the assembly and pattern selection for drive axle.In the part of selection and argumentation ,a concrete description of structure form of drive axle and its assemblies are made. In this design, it has selected the singlegrade mainreducer drive axle, it is two hypoid gears, it can simplify the structure, reduce the size, make effect use of the space and materials, reduce the whole quality. As it is for minibus and often use on good rods, so it dosen’t use differential block.In the part of designing conclusion and strength check, parameter of the essential units such as the speed reduction,differential,wheel drive mechanism and so on are selected. At the same time, the author makes the strength check to the main speed reduction,differential wheels drive mechanism.In the technology of drive ring gear shaft is analyzed, afterwards its dimensional chain is calculated.In the conclusion, the author makes a brief summary about this Graduation Project. And the author gives his heartily thanks and respects to the guide teachers and classmates, who helped and supervised the author a lot.Key words drive axle minibus differential gear mainreducer畢業(yè)設(shè)計(jì)（論文）原創(chuàng)性聲明和使用授權(quán)說明原創(chuàng)性聲明本人鄭重承諾：所呈交的畢業(yè)設(shè)計(jì)（論文），是我個人在指導(dǎo)教師的指導(dǎo)下進(jìn)行的研究工作及取得的成果。在緒論部分，對驅(qū)動橋各總成及其選用形式作了簡明扼要的說明。所以在設(shè)計(jì)過程中，設(shè)計(jì)者本著嚴(yán)謹(jǐn)和認(rèn)真的態(tài)度進(jìn)行設(shè)計(jì)。結(jié)束語是作者對本次畢業(yè)設(shè)計(jì)的一些看法和心得體會，并對悉心幫助和指導(dǎo)過我的指導(dǎo)老師和同學(xué)表示衷心的感謝和深深的敬意。2) 外形尺寸要小，保證有必要的離地間隙。當(dāng)采用獨(dú)立懸架時，為保證運(yùn)動協(xié)調(diào)驅(qū)動橋應(yīng)為斷開式，這種驅(qū)動橋無鋼性的整體外殼，主減速器及其殼體裝在車架或車身上，兩側(cè)驅(qū)動車輪則與車架或車身做彈性聯(lián)系，并可彼此獨(dú)立地分別相對于車架或車身做上下擺動，車輪傳動裝置采用萬向節(jié)傳動。3 主減速器 主減速器的結(jié)構(gòu)形式選擇 主減速器的功用：將輸入的轉(zhuǎn)矩增大并相應(yīng)降低轉(zhuǎn)速，以及當(dāng)發(fā)動機(jī)縱置時還具有改變轉(zhuǎn)矩旋轉(zhuǎn)方向的作用。選取主動齒輪左旋（從錐頂看，齒形從中心線上半部分向右傾斜）。：尺寸系數(shù)：齒面載荷分配系數(shù)：質(zhì)量系數(shù)①主動錐齒輪強(qiáng)度校核1)以發(fā)動機(jī)最大扭矩和傳動系最低當(dāng)速比所確定的主動錐齒輪的轉(zhuǎn)矩為計(jì)算扭矩來校核2)以汽車日常行駛平均轉(zhuǎn)矩所確定的主動錐齒輪轉(zhuǎn)矩為計(jì)算扭矩來校核②從動錐齒輪強(qiáng)度校核1)以發(fā)動機(jī)最大扭矩和傳動系最低當(dāng)速比所確定的從動錐齒輪的轉(zhuǎn)矩為計(jì)算扭矩來校核2)以汽車日常行駛平均轉(zhuǎn)矩所確定的從動錐齒輪轉(zhuǎn)矩為計(jì)算扭矩來校核 輪齒接觸強(qiáng)度錐齒輪輪齒的齒面接觸應(yīng)力公式：T：為所計(jì)算齒輪的計(jì)算轉(zhuǎn)矩:過載系數(shù) ：尺寸系數(shù)。 主動錐齒輪的支撐主動錐齒輪的支撐形式課分為懸臂式支撐核跨置式支撐兩種?？缰檬街沃械膶?dǎo)向軸承為圓柱磙子軸承，并且內(nèi)外全可以分離，他僅僅承受徑向力，此村根據(jù)布置位置而定，是易損壞的一個軸承。查《機(jī)械設(shè)計(jì)手冊》可知30208E， 30207E，從動軸上的1軸承壽命：主動軸上的2軸承壽命4 差速器設(shè)計(jì) 差速器形式的選擇汽車在形式的過程中，左右車輪在同一時間內(nèi)所滾過的路程往往是不相等的。但當(dāng)汽車越野行駛或在泥濘冰雪路面上行駛，一側(cè)驅(qū)動車輪與地面的符著系數(shù)很小時，盡管另一側(cè)車輪與地面有很好的符著，驅(qū)動動力矩也不得不誰負(fù)著系數(shù)小的一側(cè)同樣的減小，無法發(fā)揮潛在的牽引力，以致汽車停駛。半軸根據(jù)其車輪端的支撐方式不同，可分為半浮式，3/4浮式和全浮式三種形式。其中整體式橋殼按照制造工藝不同可分為鑄造式，鋼板沖壓焊接式和鋼管擴(kuò)充式三種。本設(shè)計(jì)中有兩處花鍵，分別是主動軸和半軸上，均選用平齒漸開線花鍵。5．橋殼，主減速器殼選用了切削加工性能好的球墨鑄鐵。一些相關(guān)部件的參數(shù)選擇，經(jīng)驗(yàn)算后證明其強(qiáng)度也都合格。由于知識有限，設(shè)計(jì)中難免出現(xiàn)錯誤或不妥之處，敬請各位老師批評指正。x4=input(39。)。x15=x14+x9*x13。x23=asin(x22)*180/pi。x31=x28*(x9x30)。x39=asin(x38)。x46=tan(x44)。x54=x12*x45/x49。x61=x54*x55。)。)。x70=x49*x51。)。x85=input(39。w=x151+x152。else x89=x85*x18*w。x93=x87+x74*x90。x101=r2d。X02=x107x108=(x72*x90x87)/x99。x116=x103*x114。xy123=cos(xz123)。x128=x68+x87*xy68。d01=x135x136=x70*x100/x99+x12。rr1=x143*180/pix144=cos(x143)。x148=x90+x92。z1=39。f=39。end運(yùn)行結(jié)果z1=10 z2min =15 z2max=20 z2=16 Rb= A0=r1= r2= m= d1= d2=fmin= fmax= ans=f f= j=ow= hg= h= t= h2dao=h1dao= h1daodao= h2daodao= c=dlt1= dlt2= r01= r02= rr1=rr2= d01= d02= x01=x02= s2= s1= b= sx1=sx2 = hx1= hx2=48