机械5

九吨级驱动桥主减速器设计 摘要：主减速器、差速器、半轴和桥壳是驱动桥内部组成最重要的四个部分，我们都知道，驱动桥其最重要也是其最基础的功能，是为了能够增大从传动轴或变速器两方面所传来的转矩，然后再把转矩分配给所需的驱动车轮使用，让驱动车轮具有我们想要的那种差速功能；此外，其还要具有能经受各种力或者力矩的能力。 作为汽车最重要的组成部分，驱动桥的好与不好将会直接影响我们设计汽车的整体性能，而对于大型载货汽车来说，其就会显得更加重要。为了能达到汽车在重载的高效率和高效益，我们要为汽车安装一个具有高效率的驱动桥。而我们还应考虑其地的一些问题，比如其最小离地间隙，所以我们设计时的齿轮要小些。判断各种原因后，本次设计我决定选用一款双级主减速器，参照我们传统的设计方法来进行。本设计我的首要目标，就是确定的设计部件的结构和参数；我又参考了其他主减速器结构，给出了本次总体设计方案；最后，我还为主、从动锥齿轮也进行了使用寿命的校核工作。本次设计决定选用圆弧锥齿轮来作为汽车的主减速器。 关键字：圆弧锥齿轮；主减速器；驱动桥；货车 Desig
n of the mai
n reducer of
ni
ne to
n drive axle Abstract: Drive from the mai
n bridge ge
neral reducer, differe
ntial, axle a
nd axle housi
ng is composed of four parts, its basic fu
nctio
n is to i
ncrease the drive shaft or by direct torque tra
nsmissio
n to the torque distributio
n to the left a
nd rightwheels, a
nd the left a
nd rightwheels ca
n have drivi
ng the differe
ntial ki
nematics i
n additio
n, fu
nctio
n; also ca
n take effect o
n the road a
nd the frame or a carriage betwee
n thevertical force, lo
ngitudi
nal force a
nd lateral force. As o
ne of the four major automobile drive axle assembly, its performa
ncewill have a direct impact o
nvehicle performa
nce, a
nd it is particularly importa
nt for the truck. Whe
n a large high-power e
ngi
ne torque output to meet the curre
nt truck fast, heavy load high efficie
ncy,
need high efficie
ncy, must be a
n efficie
nt a
nd reliable collocatio
n drive bridge. Co
nsideri
ng there must be sufficie
nt grou
nd cleara
nce, the size of the i
nter
nal gear drive axle ca
n
not be too large, so a two-stage mai
n reducer. Accordi
ng to the traditio
nal desig
n method of mai
n drive axle reducer of 9 to
n truck drive axle mai
n reducer desig
n. Firstly, determi
ne the mai
n structure type the mai
n compo
ne
nts a
nd To desig
n parameters; a
nd the
n refer to the similar drivi
ng axle mai
n reducer structure, determi
ne the overall desig
n pla
n; at the e
nd of the mai
n, drive
n bevel gear check the life-spa
n. This paper does
not use the traditio
nal hypoid gear as truck mai
n reducer, i
nstead of usi
ng the arc bevel gear. Keywords: truck; drive axle; double speed reducer; arc bevel gear 目录 摘要................................................................................................................................I Abstract.......................................................................................................................II 目录....................................................................................................................III 1绪论....................................................................................................1 1.1驱动桥结构分析...........................................................................................1 2主减速器设计................................................................................................3 2.1主减速器概述.......................................................................................................3 2.2主减速器齿轮的支承方式...................................................................................3 2.3主减速器轴承预紧...............................................................................................4 2.4锥齿轮啮合的调整...............................................................................................4 2.5润滑.......................................................................................................................5 2.6主减速器的结构形式...........................................................................................5 2.6.1主减速器的齿轮类型........................................................................................5 2.6.2主减速比的确定..............................................................................................5 2.6.3主、从动锥齿轮支承型式...............................................................................6 2.7主减速器参数的选择与计算...........................................................7 2.7.1主减速器齿轮载荷的计算........................................................................7 2.7.2主减速器齿轮基本参数的选择................................................................8 2.7.3主减速器圆弧锥齿轮尺寸计算..................................................................9 2.7.4主减速器圆弧锥齿轮强度计算................................................................10 2.7.5主减速器齿轮材料及其热处理......................................................................14 2.7.6主减速器轴承的计算...............................................................................15 3技术经济分析..............................................................................................22 4结论................................................................................................................23 参考文献...............................................................................................................24 致谢.....................................................................................................................25 附录..............................................................................................................................26