外文翻譯--驅(qū)動(dòng)橋和差速器 (2)

1、<p>　　附 錄A 英文文獻(xiàn)</p><p>　　Drive axle/differential</p><p>　　All vehicles have some type of drive axle/differential assembly incorporated into the driveline. Whether it is front, rear or four

2、 wheel drive, differentials are necessary for the smooth application of engine power to the road.</p><p>　　Powerflow </p><p>　　The drive axle must transmit power through a 90° angle. The f

3、low of power in conventional front engine/rear wheel drive vehicles moves from the engine to the drive axle in approximately a straight line. However, at the drive axle, the power must be turned at right angles (from the

4、 line of the driveshaft) and directed to the drive wheels.</p><p>　　This is accomplished by a pinion drive gear, which turns a circular ring gear. The ring gear is attached to a differential housing, contain

5、ing a set of smaller gears that are splined to the inner end of each axle shaft. As the housing is rotated, the internal differential gears turn the axle shafts, which are also attached to the drive wheels.</p>&l

6、t;p>　　Rear-wheel drive</p><p>　　Rear-wheel-drive vehicles are mostly trucks, very large sedans and many sports car and coupe models. The typical rear wheel drive vehicle uses a front mounted engine and tr

7、ansmission assemblies with a driveshaft coupling the transmission to the rear drive axle. Drive in through the layout of the bridge, the bridge drive shaft arranged vertically in the same vertical plane, and not the driv

8、e axle shaft, respectively, in their own sub-actuator with a direct connection, but the actuator is located </p><p>　　of the two bridges is arranged in series. Vehicle before and after the two ends of the dr

9、iving force of the drive axle, is the sub-actuator and the transmission through the middle of the bridge. The advantage is not only a reduction of the number of drive shaft, and raise the driving axle of the common parts

10、 of each other, and to simplify the structure, reduces the volume and quality.</p><p>　　Some vehicles do not follow this typical example. Such as the older Porsche or Volkswagen vehicles which were rear engi

11、ne, rear drive. These vehicles use a rear mounted transaxle with halfshafts connected to the drive wheels. Also, some vehicles were produced with a front engine, rear transaxle setup with a driveshaft connecting the engi

12、ne to the transaxle, and halfshafts linking the transaxle to the drive wheels.</p><p>　　Differential operation</p><p>　　In order to remove the wheel around in the kinematics due to the lack of c

13、o-ordination about the wheel diameter arising from a different or the same rolling radius of wheel travel required, inter-wheel motor vehicles are equipped with about differential, the latter to ensure that the car drive

14、r Bridge on both sides of the wheel when in range with a trip to the characteristics of rotating at different speeds to meet the requirements of the vehicle kinematics.</p><p>　　The accompanying illustration

15、 has been provided to help understand how this occurs. </p><p>　　1.The drive pinion, which is turned by the driveshaft, turns the ring gear.</p><p>　　2.The ring gear, which is attached to the di

16、fferential case, turns the case.</p><p>　　3.The pinion shaft, located in a bore in the differential case, is at right angles to the axle shafts and turns with the case.</p><p>　　4.The differenti

17、al pinion (drive) gears are mounted on the pinion shaft and rotate with the shaft .</p><p>　　5.Differential side gears (driven gears) are meshed with the pinion gears and turn with the differential housing a

18、nd ring gear as a unit.</p><p>　　6.The side gears are splined to the inner ends of the axle shafts and rotate the shafts as the housing turns.</p><p>　　7.When both wheels have equal traction, th

19、e pinion gears do not rotate on the pinion shaft, since the input force of the pinion gears is divided equally between the two side gears.</p><p>　　8.When it is necessary to turn a corner, the differential g

20、earing becomes effective and allows the axle shafts to rotate at different speeds .</p><p>　　Open-wheel differential on each general use the same amount of torque. To determine the size of the wheel torque t

21、o bear two factors: equipment and friction. In dry conditions, when a lot of friction, the wheel bearing torque by engine size and gear restrictions are hours in the friction (such as driving on ice), is restricted to a

22、maximum torque, so that vehicles will not spin round. So even if the car can produce more torque, but also need to have sufficient traction to transfer torque to the </p><p>　　Limited-slip and locking differ

23、ential operation Differential settlement of a car in the uneven road surface and steering wheel-driven </p><p>　　speed at about the different requirements; but is followed by the existence of differential i

24、n the side car wheel skid can not be effective when the power transmission, that is, the wheel slip can not produce the driving force, rather than spin the wheel and does not have enough torque. Good non-slip differentia

25、l settlement of the car wheels skid on the side of the power transmission when the issue, that is, locking differential, so that no longer serve a useful differential right and left sides</p><p>　　Limited-sl

26、ip and locking differential operation can be divided into two major categories：</p><p>　　(1) mandatory locking type in ordinary differential locking enforcement agencies to increase, when the side of the whe

27、el skid occurs, the driver can be electric, pneumatic or mechanical means to manipulate the locking body meshing sets of DIP Shell will be with the axle differential lock into one, thus the temporary loss of differential

28、 role. Relatively simple structure in this way, but it must be operated by the driver, and good roads to stop locking and restore the role of differential.      </p><p>　　Gear ratio <

29、/p><p>　　The drive axle of a vehicle is said to have a certain axle ratio. This number (usually a whole number and a decimal fraction) is actually a comparison of the number of gear teeth on the ring gear and t

30、he pinion gear. For example, a 5.12 rear means that theoretically, there are5.12 teeth on the ring gear for each tooth on the pinion gear or, put another way, the driveshaft must turn 5.12 times to turn the wheels once.

31、The role of the final drive is to reduce the speed from the drive shaft, thereb</p><p>　　附 錄B 文獻(xiàn)翻譯</p><p><b>　　驅(qū)動(dòng)橋和差速器</b></p><p>　　所有的汽車都裝有不同類型的驅(qū)動(dòng)橋和差速器來(lái)驅(qū)動(dòng)汽車行駛。無(wú)論是前驅(qū)汽車，

32、后驅(qū)汽車還是四輪驅(qū)動(dòng)的汽車，對(duì)于將發(fā)動(dòng)機(jī)的動(dòng)力轉(zhuǎn)化到車輪上差速器都是不可缺少的部件。</p><p><b>　　動(dòng)力的傳遞</b></p><p>　　驅(qū)動(dòng)橋必須把發(fā)動(dòng)機(jī)的動(dòng)力轉(zhuǎn)一個(gè)直角后傳遞出去，但人對(duì)于前輪驅(qū)動(dòng)汽車發(fā)動(dòng)機(jī)輸出的轉(zhuǎn)矩與主減速器是在同一直線上的，但是發(fā)動(dòng)機(jī)前置的后輪驅(qū)動(dòng)的汽車發(fā)動(dòng)機(jī)的動(dòng)力必須以正確的角度傳遞出去，來(lái)驅(qū)動(dòng)車輪。</p>&

33、lt;p>　　圖中所示是齒輪驅(qū)動(dòng)的過(guò)程，即由一個(gè)相對(duì)小的齒輪驅(qū)動(dòng)一個(gè)大齒輪（主動(dòng)齒輪和從動(dòng)齒輪），從動(dòng)錐齒輪和差速器殼連接在一起，在半軸的根部有一對(duì)帶有內(nèi)花鍵的半軸齒輪，半軸齒輪和半軸通過(guò)花鍵來(lái)連接在一起。當(dāng)差速器殼旋轉(zhuǎn)時(shí)，就驅(qū)動(dòng)內(nèi)部的半齒輪轉(zhuǎn)動(dòng)從而使半軸轉(zhuǎn)動(dòng)，將轉(zhuǎn)矩傳給車輪。</p><p><b>　　后驅(qū)動(dòng)橋</b></p><p>　　后輪驅(qū)動(dòng)的車輛大多

34、是卡車，大型轎車和大部分跑車。典型的后輪驅(qū)動(dòng)的車輛使用前置發(fā)動(dòng)機(jī)和變速箱總成將轉(zhuǎn)矩傳輸?shù)胶筝嗱?qū)動(dòng)橋。多驅(qū)動(dòng)橋汽車中，在貫通式驅(qū)動(dòng)橋的布置中，各橋的傳動(dòng)軸布置在同一縱向鉛垂平面內(nèi)，并且各驅(qū)動(dòng)橋不是分別用自己的傳動(dòng)軸與分動(dòng)器直接聯(lián)接，而是位于分動(dòng)器前面的或后面的各相鄰兩橋的傳動(dòng)軸，是串聯(lián)布置的。汽車前后兩端的驅(qū)動(dòng)橋的動(dòng)力，是經(jīng)分動(dòng)器并貫通中間橋而傳遞的。其優(yōu)點(diǎn)是，不僅減少了傳動(dòng)軸的數(shù)量，而且提高了各驅(qū)動(dòng)橋零件的相互通用性，并且簡(jiǎn)化了結(jié)構(gòu)、減

35、小了體積和質(zhì)量。</p><p>　　一些車輛不是這個(gè)典型的例子。如老式的保時(shí)捷或大眾汽車引擎在汽車后面，是后輪驅(qū)動(dòng)。這些車輛使用的后方安裝驅(qū)動(dòng)橋與半軸來(lái)驅(qū)動(dòng)車輪。另外，一些車輛是前置引擎，后橋與傳動(dòng)軸連接發(fā)動(dòng)機(jī)來(lái)驅(qū)動(dòng)車輪。</p><p><b>　　差速器</b></p><p>　　為了消除由于左右車輪在運(yùn)動(dòng)學(xué)上的不協(xié)調(diào)而產(chǎn)生左右車輪外徑

36、不同或滾動(dòng)半徑不相等而要求車輪行程，汽車左右驅(qū)動(dòng)輪間都裝有差速器，后者保證了汽車驅(qū)動(dòng)橋兩側(cè)車輪在行程不等時(shí)具有以不同速度旋轉(zhuǎn)的特性，從而滿足了汽車行駛運(yùn)動(dòng)學(xué)要求。</p><p>　　如圖所示說(shuō)明了其工作情況</p><p>　　主動(dòng)齒輪轉(zhuǎn)動(dòng)，從而驅(qū)動(dòng)從動(dòng)齒輪。</p><p>　　從動(dòng)齒輪將轉(zhuǎn)矩作用于差速器殼，使其轉(zhuǎn)動(dòng)。</p><p>　

37、　位于差速器殼中的行星齒輪以適當(dāng)?shù)慕嵌群桶胼S齒輪接觸，并隨的差速器殼轉(zhuǎn)動(dòng)。</p><p>　　行星齒輪（驅(qū)動(dòng)齒輪）和十字軸連接，和十字軸一起轉(zhuǎn)動(dòng)。</p><p>　　半軸齒輪（被驅(qū)動(dòng)齒輪）和行星齒輪嚙合并且和從動(dòng)齒輪及差速器殼作為一個(gè)整體一起轉(zhuǎn)動(dòng)。</p><p>　　半軸齒輪的內(nèi)花鍵和半軸端部餓花鍵接在一起隨著差速殼一起轉(zhuǎn)動(dòng)。</p><p

38、>　　當(dāng)兩側(cè)車輪轉(zhuǎn)速相同時(shí)，行星齒輪和半軸齒輪無(wú)相對(duì)運(yùn)動(dòng)，左右齒輪力矩平均分配。</p><p>　　當(dāng)汽車轉(zhuǎn)彎時(shí)差速器開(kāi)始起作用，是兩側(cè)的半軸以不同的轉(zhuǎn)速旋轉(zhuǎn)。</p><p>　　開(kāi)式差速器對(duì)每個(gè)車輪一般使用相同量的扭矩。確定車輪承受的扭矩大小的因素有兩個(gè)：設(shè)備和摩擦力。在干燥的條件下，當(dāng)摩擦力很大時(shí)，車輪承受的扭矩大小受發(fā)動(dòng)機(jī)和擋位的限制，在摩擦力很小時(shí)（如在冰上行駛），限制為

39、最大扭矩，從而使車輪不會(huì)打滑。所以，即使汽車可以產(chǎn)生較大扭矩，也需要足夠的牽引力將扭矩傳輸?shù)降孛?。如果在車輪打滑之后加大油門，只會(huì)使車輪更快地旋轉(zhuǎn)。 如果曾在冰上駕駛過(guò)，您可能知道加速的竅門：如果啟動(dòng)時(shí)掛在二擋或三擋而不是一擋，則由于變速器中的齒輪傳動(dòng)，車輪的扭矩會(huì)較小。這樣更容易在不旋轉(zhuǎn)車輪的情況下加速。如果其中一個(gè)驅(qū)動(dòng)輪具有很好的摩擦力，而另一個(gè)卻在冰上時(shí)，這是開(kāi)式差速器存在的問(wèn)題。</p><p><

40、b>　　防滑差速器</b></p><p>　　差速器很好的解決了汽車在不平路面及轉(zhuǎn)向時(shí)左右驅(qū)動(dòng)車輪轉(zhuǎn)速不同的要求；但隨之而來(lái)的是差速器的存在使得汽車在一側(cè)驅(qū)動(dòng)輪打滑時(shí)動(dòng)力無(wú)法有效傳輸，也就是打滑的車輪不能產(chǎn)生驅(qū)動(dòng)力，而不打滑的車輪又沒(méi)有得到足夠的扭矩。防滑差速器很好的解決了汽車在一側(cè)車輪打滑時(shí)出現(xiàn)的動(dòng)力傳輸?shù)膯?wèn)題，也就是鎖止差速器，讓差速器不再起作用，左右兩側(cè)的驅(qū)動(dòng)輪均可得到相同的扭矩。<

41、;/p><p>　　防滑差速器主要可分為兩大類： </p><p>　　（1）強(qiáng)制鎖止式在普通差速器上增加強(qiáng)制鎖止機(jī)構(gòu)，當(dāng)發(fā)生一側(cè)車輪打滑時(shí)，駕駛員可通過(guò)電動(dòng)、氣動(dòng)或機(jī)械的方式來(lái)操縱鎖止機(jī)構(gòu)，撥動(dòng)嚙合套將差速器殼與半軸鎖成一體，從而暫時(shí)失去差速的作用。這種方式結(jié)構(gòu)比較簡(jiǎn)單，但必須由駕駛員進(jìn)行操作，并在良好路面上停止鎖止，恢復(fù)差速器的作用。 </p><p>　?。?）自

42、鎖式在差速器中安裝粘性硅油聯(lián)軸節(jié)或摩擦離合器，當(dāng)發(fā)生一側(cè)車輪打滑時(shí)，兩側(cè)半軸出現(xiàn)轉(zhuǎn)速差，聯(lián)軸節(jié)或離合器就自動(dòng)發(fā)生摩擦阻力，使另一側(cè)車輪得到一定的扭矩而驅(qū)動(dòng)汽車?yán)^續(xù)行駛。當(dāng)兩側(cè)車輪沒(méi)有轉(zhuǎn)速差時(shí)，摩擦阻力消失，自動(dòng)恢復(fù)差速器的作用。這種方式結(jié)構(gòu)比較復(fù)雜，但不需要駕駛員進(jìn)行操作。目前已越來(lái)越多地在汽車上得到應(yīng)用。 防滑差速器不僅用于左右車輪間的差速器，也用于全輪驅(qū)動(dòng)汽車的軸間差速器中。</p><p><b>

43、;　　主減速比</b></p><p>　　驅(qū)動(dòng)橋都有一定得主減速比，這個(gè)數(shù)字（通常是一個(gè)整數(shù)和一個(gè)小數(shù)）實(shí)際上是主減速器主動(dòng)齒輪與從動(dòng)齒輪的關(guān)系。例如，如果主減速比為5.12則說(shuō)明從動(dòng)齒輪的齒數(shù)是主動(dòng)齒輪齒數(shù)的5.12倍，換句話說(shuō)就是主動(dòng)齒輪軸轉(zhuǎn)動(dòng)5圈車輪才轉(zhuǎn)動(dòng)1圈。</p><p>　　主減速器的作用是降低從傳動(dòng)軸傳來(lái)的轉(zhuǎn)速，從而增大扭矩。主減速器的減速比，對(duì)汽車的動(dòng)力性能