驱动桥设计随着汽车对安全、节能、环保的不断重视，汽车后桥作为整车的一个关键部件，其产品的质量对整车的安全使用及整车性能的影响是非常大的，因而对汽车后桥进行有效的优化设计计算是非常必要的。
驱动桥处于动力传动系的末端，其基本功能是增大由传动轴或变速器传来的转矩并将动力合理地分配给左、右驱动轮，另外还承受作用于路面和车架或车身之间的垂直力力和横向力。
驱动桥一般由主减速器、差速器、车轮传动装置和驱动桥壳等组成。
驱动桥作为汽车四大总成之一，它的性能的好坏直接影响整车性能，而对于载重汽车显得尤为重要。
驱动桥设计应当满足如下基本要求：1、符合现代汽车设计的一般理论。
2、外形尺寸要小，保证有必要的离地间隙。
3、合适的主减速比，以保证汽车的动力性和燃料经济性。
4、在各种转速和载荷下具有高的传动效率。
5、在保证足够的强度、刚度条件下，力求质量小，结构简单，加工工艺性好，制造容易，拆装，调整方便。
6、与悬架导向机构运动协调，对于转向驱动桥，还应与转向机构运动协调。
智能电子技术在汽车上得以推广使得汽车在安全行驶和其它功能更上一层楼。
通过各种传感器实现自动驾驶。
除些之外智能汽车装备有多种传感器能充分感知交通设施及环境的信息并能随时判断车辆及驾驶员是否处于危险之中，具备自主寻路、导航、避撞、不停车收费等功能。
有效提高运输过程中的安全，减少驾驶员的操纵疲劳度，提高乘客的舒适度。
当然蓄电池是电动汽车的关键，电动汽车用的蓄电池主要有：铅酸蓄电池、镍镉蓄电池、钠硫蓄电池、钠硫蓄电池、锂电池、锌一空气电池、飞轮电池、燃料电池和太阳能电池等。
在诸多种电池中，燃料电池是迄今为止最有希望解决汽车能源短缺问题的动力源。
燃料电池具有高效无污染的特性，不同于其他蓄电池，其不需要充电，只要外部不断地供给燃料，就能连续稳定地发电。
燃料电池汽车（FCEV）具有可与内燃机汽车媲美的动力性能，在排放、燃油经济性方面明显优于内燃机车辆。
这项发明通常涉及到多能源动力总成的车辆，以及，尤其是多能源动力总成，有多个电源包括电动马达来驱动的汽车轮子。
混合动力电动动力系统已经被发展成为包括电机（IC）做内燃机引擎，自主经营的或者联合根据行驶条件下，国家费用的牵引电池，与电源,最有效地满足当前所产生的电力需求车辆操作。
大部分电子混合动力汽车可以在市场上买到是前轮驱动车辆，只不过前轮带动起来的。
混合动力电动动力系统被开发用于四轮驱动车，允许两个电机和引擎传送权力后方的驱动轮。
当包装电动马达驱动后桥机组是较好的使用躺轴功率流，马达驱动单元被放在后桥中心线。
这样的电的混合动力系统，然而,现在的包装设计很困难，特别是当副轴车辆传动是用来传输动力，纵向驱动轴后轴。
需要混合动力电动存在的动力,在其中轴是靠电动机驱动的或的内燃机结合电机。
以减少成本，电动机器将提供所有混合功能，包括电气能源的产生、电动汽车、电子发动机启动投放市场，提高发动机的功率，再生式制动。
一个驱动器单位是混合动力电动汽车包括发动机，电动机器包括转子，副轴，齿轮组包括一个输入可驱动的连接到发动机和输出, 用来传送之间权限投入与产出和生产第一速度微分导致一个录入速度超过每小时的速度输出，第一和第二驾车轴差动机构可驱动的连接到输出线时，因为传输功率和输出之间驾车轴，可驱动的行星齿轮装置连接到输出和转子，说之间权限传输转子和输出线,制作了第二速度微分导致转子速度超过速度输出。
转矩反应为减速的行星齿轮传动提供关于住房通过鼓轴或孔中，而不是通过一个外径住房，从而简化轴承支撑要求和允许紧凑的定位的机械传动的元素。
使用的行星齿轮传动将车速元素的电机驱动电只准许路径的尺寸缩小包装驱动单元所需的空间。
标准的适用范围就变得更加明显的优选从以下的详细描述，索赔和图纸。
要理解，的描述和明确的例子，虽然指示优先考虑的重要体现，给出了发明的说明而已。
各种各样的变化、修改描述和例子仍变得明显体现技术领域的人。
另外，设计必须得考虑所选择材料的可加工性能。
一种材料的可机加工性通常以四种因素的方式定义：1、分的表面光洁性和表面完整性。
2、刀具的寿命。
3、切削力和功率的需求。
4、切屑控制。
以这种方式，好的可机加工性指的是好的表面光洁性和完整性，长的刀具寿命，低的切削力和功率需求。
关于切屑控制，细长的卷曲切屑，如果没有被切割成小片，以在切屑区变的混乱，缠在一起的方式能够严重的介入剪切工序。
因为剪切工序的复杂属性，所以很难建立定量地释义材料的可机加工性的关系。
在制造厂里，刀具寿命和表面粗糙度通常被认为是可机加工性中最重要的因素。
尽管已不再大量的被使用，近乎准确的机加工率在以下的例子中能够被看到。
通常，零件的可机加工性能是根据以下因素来定义的：表面粗糙度，刀具的寿命，切削力和功率的需求以及切屑的控制。
材料的可机加工性能不仅取决于起内在特性和微观结构，而且也依赖于工艺参数的适当选择与控制。
拖臂悬架结合起来的一种行为，semi-trailing-arm落后表现出轴。
它是用来驱动的汽车前面。
如果轴经验，它就像一卷悬垂态的手臂。
扭转刚度的摩天大楼，这活象一个stabiliser酒吧。
如果两个轮子的旅行经历相同的悬架（例如在球场的汽车）轴表现得像个拖臂悬架。
梁式轴（Four-Link-Style）前面的一辆汽车后轴，不必有相同的高度为他们的卷中心。
辊轴轴线上，这是经过辊子的中心一一和后轴，看到前面的图。
辊轴如果一个横向力的重心，导致层（fom）上面的重心轴的卷必须补偿片刻所致。
由于一些弹簧悬辊。
这一刻之间分配方面和后桥有赖于相对弹簧刚度的前面，与后轴，整体侧倾角（这是一样的，和后轴）取决于总和的悬架刚度（前加上后方）。
传送到地面的瞬间，没有任何卷的整体车辆通过应用侧向力轴向前滚动的位置（在CG）。
（注:如果滚动的轴,剩下的扭矩，CG必须补偿汽悬泉会像一辆摩托车内倾斜。
这一幕的分布与后轴会，计算了分别计算各轴的位置,by-using相应的axle-using卷中心的一部分的事实，轮轴横向力所承受的一部分，与正常负荷、轮轴必须随身携带不同的例子一个有限的特点，防滑差速器有点不同，不同的风格，一个自锁装置。
这个Torsen ?风格差异;（从扭矩遥感）行为非常快（并可能严厉的）。
在较低的输入扭矩的差动齿轮只是轻轻负载和移动，自由敞开的装置。
随着力矩和速度起落架网格，大米和两个输出轴锁在一起。
扭矩比（high-torque-wheel除以 low-torque-wheel）不等,2.5:1 max。
7:1,Torsen II 的风格，从 3:1 来1.8:1（根据齿轮,齿轮表面处理的角度，类型的滚子轴承（平原,…）达纳Trac-Loc ? limited-slip差的（见图）包含一些预紧通过弹簧离合器片、贝尔维尔）提供了一定的静态启动扭矩已经在零输入扭矩。
蜘蛛齿轮，齿轮啮合侧设计那样（楔形齿）,增加输入扭矩将增加的负担，提高离合器盘的锁轴。
独立的粘性微分锁的扭矩，但反应速度与输出轴之间的差异。
包括离合器片没有机械接触，但是很紧的间隙,使粘滞摩擦提供扭矩的转让。
注意，粘稠的差距在很光滑，有一定的时间延迟，作为粘度增加与所产生的热量（指的是特殊的液体是合宜的齿厚）。
这使得操作容易使用汽车（虽然可以街是太慢了有些应用）。
Desig n of driv ing axleAs the car to safety, en ergy sav ing, the con sta nt atte nti on to en vir onmen tal protect ion, vehicle after vehicle bridge as a key comp onent, the quality of their products on the safe use of cars and car performa nee of a very large, so the car after Bridge Effectively optimize the design and calculation is very n ecessary.Drive Bridge at the end of powertra in, its basic fun cti on is to in crease came from the drive shaft or tran smissi on of torque and power reas on ably allocated to the left and right driv ing wheel and also bear in the role of the road and trailers or Body of power between the vertical and horizontal force. Drive from the main bridge general reducer, differential and the wheels, transmission and drive axle comp onen ts, such as Shell.Bridge drive a vehicle with one of the four trains, its performance will have a direct impact on vehicle performance, and it is particularly important for the truck. Drive bridge should be desig ned to meet the follow ing basic requireme nts:a) a suitable main slowdow n tha n to en sure that the car from the best power and fuel economy.b) small form factor to en sure that the n ecessary ground cleara nee.c) tran smissi on gears and other parts of a smooth, no ise.d) in various load and speed of tran smissi on with high efficie ncy.e) to ensure adequate strength, stiffness conditions, should strive for the quality of small, in particular the quality of the spring as possible, to improve the car ride.f) suspe nsion and body-orie nted moveme nt coordi nati on, the drive to the bridge, should also be coord in ated with the campaig n steeri ng mecha ni sm.g) simple structure, process ing tech no logy and good, easy to manu facture, en ables easy adjustme nt..In tellige nt electro nic tech no logy in the bus to promote safe driv ing and that the other functions. The realization of automatic driving through various sensors. Except some smart cars equipped with multiple outside sen sors can fully perception of information and traffic facilities and to judge whether the vehicles and drivers in dan ger, has the in depe ndent pathfi nding, n avigati on, avoid bump, no park ing fees etc. Function. Effectively improve the safe tran sport of man ipulati on, reduce the pilot fatigue, improve passe nger comfort. Of course battery electric vehicle is the key, the electric car battery mainly has: the use of lead-acid batteries, ni ckel cadmium battery, the battery, sodium sulfide sodiumsulfide lithium battery, the battery, the battery, the flywheel zinc - air fuel cell and solar battery, the battery .In many kind of cells, the fuel cell is by far the most want to solve the problem of en ergy shortage car. Fuel cells have high pollution characteristics, different from other battery, the battery, need not only external constantly supply of fuel and electricity can continuously steadily. Fuel cell vehicles (FCEV) can be matched with the car engine performa nee and fuel economy and emissi on in the aspects of superior intern al-combustio n vehicles.Keyword: drive axle differe ntial bridge reducer Bridge shellThis is an ANSYS optimum desig n for driv ing axle hous ing of a off-road vehicle.Firstly, the author established a three-dime nsional model of the driv ing axle. States of stress in differe nt worki ng con diti ons were an alyzed. Furthermore, the maximum pressure of driv ing axle was achieved.And the n, the three-dime nsio nal model was imported in to ANSYS, with some other mani pulatio ns, such as meshi ng, addi ng degree of freedom, appl ying surface loads, etc.States of stress of driv ing axle were calculated with the results exported. Fin ally, this paper carried out the optimum desig n accord ing to the target of minimizing the qualitative properties and homogenizing the distribution of stresses. TheCon firmatory an alysis showed that this desig n measured up to the engin eeri ng requireme nt.This inven tio n relates gen erally to a powertra in for a vehicle, and, more particularly, to a powertrain having multiple power sources including an electric motor for driv ing a set of vehicle wheels.Hybrid electric powertra ins have bee n developed that in clude an electric motorand an internal combustio n (IC) engine, which can operate in depe nden tly or in comb in ati on depe nding onthe driv ing con diti ons, the state of charge of a tract ion battery, and the power source that most efficie ntly meets the curre nt power dema nds imposed by the vehicle operator.Most electric hybrid vehicles available commercially are front wheel drive vehicles, in which only the front wheels are drive n. Hybrid electric powertrains being developed for use in four-wheel drive vehicles allow both the motor and engine to tran smit power to a rear set of drive n wheels.Whe n packaging an electric motor drive unit for a rear axle it is preferable to use a lay shaft power flow such that the motor drive unit is placed on the rear axle cen terl ine. Such electric hybrid drive systems, however, prese nt packag ing difficulties to the vehicle designer, particularly when layshaft gearing is used to transmit power from a longitudinal drive shaft to a rear axle.A need exists for a hybrid electric powertrain in which one axle is driven by an electric motor or an IC engine in combination with the motor. To minimize cost, an electric machine would provide all hybrid functions including electric energy generation, electric vehicle launch, engine starting, electric boosting of engine power, and regenerative braking. A drive unit for a hybrid electric motor vehicle includes an engine, an electric machine including a rotor, a layshaft gearset including an input driveably connected to the engine and an output, for transmitting power between the input and the output and producing a first speed differential that causes a speed of the input to exceed a speed of the output, first and second driveshafts, a differential mechanism driveably connected to said output, for transmitting power between said output and the driveshafts, and a planetary gear unit driveably connected to the output and the rotor, fortransmitting power between said rotor and said output and producing a second speed differential that causes a speed of the rotor to exceed the speed of the output.A torque reaction for the speed reduction planetary gearing is provided on a housing through a bore of a shaft or drum rather than through an outer diameter of the housing, thereby simplifying the bearing support requirements and allowing compact positioning of the mechanical drive elements. Use of planetary gearing to reduce the speed of elements driven by the electric machine in the electric only drive path reduces the size of the package space required for the drive unit. The scope of applicability of the preferred embodiment will become apparent from the following detailed description, claims and drawings. It should be understood, that the description and specific examples, although indicating preferred embodiments of the invention, are given by way of illustration only. Various changes and modifications to the described embodiments and examples will become apparent to those skilled in the art.MACHINABILITYThe machinability of a material usually defined in terms of four factors:1、Surface finish and in tegrity of the mach ined part;2、Tool life obta in ed;3、Force and power requireme nts;4、Chip con trol.Thus, good mach in ability good surface finish and in tegrity, long tool life, and low force And power requireme nts. As for chip con trol, l ong and thi n (stringy) cured chips, if not broken up, can severely interfere with the cutting operati on by beco ming entan gled in the cutt ing zone.Because of the complex n ature of cutt ing operatio ns, it is difficult to establish relati on ships that qua ntitatively defi ne the machi nability of a material. In manu facturi ng pla nts, tool life and surface rough ness are gen erallySide View:A 一-一 _ 八1considered to be the most important factors in machinability. AlthoughnotTop View:Rollused much any more, approximate machi nability rat ings are available in the example below.SUMMARYMach in ability is usually defi ned in terms of surface fini sh, tool life, force and power requireme nts, and chip con trol. Machi nability of materials depe nds not only on their intrin sic properties and microstructure, but also on proper select ion and con trol of process variables.A comb in ati on of traili ng- and semi-traili ng-arm behaviour shows the followi ng axis. It is used for front driven cars only. If the axle experiences roll, it behaves like a semi-trailing arm. The torsional stiffness counteracts the roll, by this acting like a stabiliser bar. If both wheels experie nee the same suspe nsiontravel (e.g. duri ng pitch of the car) the axle behaves like a traili ng armsuspe nsion.Beam Type Axle (Four-Link-Style)Front- and rear-axle of a car n eed n't have the same hight for their roll cen ter.The rollaxis is that axis, that goes through the roll cen ter of front- and rear-axle, see followi ng draw ing:Roll AxisIf a lateral force is applied at the center of gravity, the moment resulting fom the hight ofthe cen ter of gravity above the roll axis has to be compe nsated by a mome nt caused bythesuspe nsion spri ngs due to some roll. The distributi on of this mome nt betwee n fron t-and rear axle depends on the relative spring stiffness of front- and rear-axle, the overallroll an gle (which is the same for front- and rear-axle) depe nds on the sum of the suspe nsion stiff ness (front plus rear).The moment transmitted to the ground without any roll for the overall vehicle is give n bythe applied lateral force times the roll axis hight (at the position of CG). (Remark: If theroll axis is above the CG, the remaining torque that has to be compensated by thesuspe nsion spri ngs would make the car lea n in side like a motorcycle!). The distributio n of this mome nt betwee n front- and rear-axle can be calculated bycalculating each axle seperately, by-using the position of the roll centerof the corresponding axle-using the fact thatthe part of lateral force, that the axle has to carry,corresp onds to the part of the no rmal load, theaxle has to carry Differe ntial Examples Thecharacteristics of a limited slip differe ntial are a little bit different for differe ntstyles of a self-lock ing device. The Torsen ? style differe ntials (from TORque SENs ing) act very fast (and possibly harsh). Un der low in put torque the differe ntial gears are only lightly loaded and move freely like an ope n device. With in creas ing torque (and speed) the gearmeshes areloaded up and the two output shafts are locked together. The torque ratioPmoni (Sp*0or|产 nion Shaft00Rlry FBrlKwItJS OBdutch PW BB M of pWnmny nwi/ Caw(high-torque-wheel divided by low-torque-wheel) varies from max. 7:1 to 2.5:1, for the Torse n II stylefrom 3:1 to 1.8:1 (depe nding on gear an gles, gear surface treatme nt, type of beari ng(pla in, roller...)The Dana Trac-Loc ? limited-slip differential (see picture below) contains some preloaded(by Belleville spri ngs) clutch plates, which provide a certa in static breakout torquealready at zero in put torque. The spider gear and side gear mesh are desig ned in that way (with wedge-shaped gear teeth), that in creas ing in put torque will in crease the loadon the clutch plates, by this increasing the locking of the axle.Dana Trac-Loc ? limited-slip differentialThe viscous differe ntial locks in depe ndent of of torques, but reacts to the speeddiffere nces betwee n the output shafts. The contained clutch plates have no mecha ni cal con tact, but very tight cleara nces, so that the viscous frict ion provides the torquetransfer. Note that viscous differentials set in very smooth, and with a certain time delay, as theviscosity in creases with thegen erated heat (mea ns the special fluid is beco ming 'thicker'). This makes the handli ng easier for street use4 TSO-2fiDfiOO-790-500 D -250 *5® 订000cars (while may be too slow for some raci ng applicati on s).Welcome To Download !!!欢迎您的下载，资料仅供参考！。