差速器外文文獻(xiàn)

1、差速器外文By ordinary d iff ere ntial plan etary gear, the planet round rack (differential shell) and half axle gears, etc parts. By the power of the engine, direct drive shaft into d if fere ntial plan etary wheel frame, agai n by the planets wheel drive left, right, two half shaft are respectively driv

2、en wheels left and right. Differential design requirements meet: (left) + (right shaft speed shaft speed) = 2 (planets wheel frame speed). When the automobile moher, left, right wheel and planetary wheel frame three speed equal in balanee, while in the car when turning three equilibrium state is des

3、troyed, cause the medial wheel speed decreases, and the lateral wheel RPM in creases.Automotive differential is driven axle Lord pieces. Its function is to both sides half shaft transmission power, while allowing both sides half shaft in different speed rotating, satisfy both sides wheel as pure rol

4、ling forms do isometric driving, reducing tire and the surface friction.Differential this adjustment is automatic, here involves Hminimal energy con sumption prin ciple1, n amely earth all objects are incli ned to con sumpti on minimum state. For example a grain of beans into a bowl, beans will auto

5、matically stays in the bowl bottom and never stay in bowl wall, because bowl bottom is lowest energy position (potential), it automatically select static (minimum) without constantly kinetic energy movement. In the same way, Wheel in cornering would also automatically tendency of the lowest energy c

6、on sumption in accord a nee with state, automatically turni ng radius adjusti ng right wheels speed.Whe n com ering, due to the lateral frictio n wheel dragged phe nomenon, medial wheel have slip phenomenon, two driving wheel now can produce two opposite di recti on of additi onal force, as a result

7、 of nmin imal en ergy con sumpti on prin cipleH, which in evitably leads on both sides of the wheel speed d if fere nee, thus destroyed three bala nee relati on ship, and through the half shaft are reflected in half axle gear, forcing planetary gear produce rotation, make the lateral half shaft spee

8、d faster, medial half axle planetismal, thus realize both sides wheel speed d iff ere nee.If the drive wheels on either side of the drive axle shaft to the use of a whole rigid connection，the two wheels can only at the same Angle rotation. So, when the vehicle steering wheel drive, due to the latera

9、l than medial wheels moved across the distanee is big, will make the lateral wheels in rolling produced simultaneously slippery procrastinate, and medial wheels in rolling produced simultaneously slip. Even the car run straight road gravamen, because although pavement straight but tyres or rolling r

10、adius range (tyre manufacture error, wear d if fere nt, by the un eve n or pn eumatic ranging caused by the wheels of slidi ng).Wheel when not only aggravate sliding tire wear, increase power and fuelcon sumption, still can make the vehicle steeri ng difficulties, braki ng performance becomes poor.

11、For the wheel as far as possible will not occur in the structure of sliding, must guarantee the wheels can come with d iff ere nt Angle rotation.Axis betwee n d iff ere ntial: usually drive n wheel beari ngs for support on spindle, enable to any Angle rotation，and drive wheels respectively with two

12、root half axle rigid connection, in between two root half shaft with differential. This d if fere ntial also called shaft between differential.slowly, right wheels faster, with different speed to compensate for the distanee of the differences.If after axles make it a whole, he could nt do it on both

13、 sides of the wheel speed differenee, namely cant do an automatic adjustment. In order to solve this problem, as early as in a hundred years ago, France Renault automotive company founder luis Renault will design a differential in this thingModern vehicles on the differential usually according to it

14、s work characteristics into gear type differential and slip differential two kinds big.The structure of the Cherokee opervdie differential is typical of planetary gear set structure, only the sun wheel and outside the pinion gear ring are the same. In this planetary gear set, driving gear is planet

15、shelf, passive round is two SUNS wheel. Through the planetary gear set the transmission properties we know, if the planet shelf as ZhuDongZhou, two SUNS wheel speed and rotation di recti on is not affirmatory, eve n two SUNS wheel rotati on directi on is the opposite.Vehicle condition, this differen

16、tial moher, feature is to two and a half shaft transmission torque of the same. In a driving wheel impending case, if the drive shaft rotation, have adhesion is uniform the driving wheels of driving force, if there is no drive shaft rotation is accelerated, have adhesion the driving wheels driving f

17、orce equals impending wheel Angle acceleration and rotary inertia of the product.Vehicle turning tires dont skid condition, connect the two halves of the d if fere ntial shaft torque di recti on is opposite, give the vehicle drivi ng forward, and only the in side of the wheel, the planet shelf and m

18、edial sun round by the isokinetic transmission between became deceleration transmission, driving sensation is accelerated speed comers than straight more powerful.The advantages of open-die differential is installed in the pavement turned driving on the best effect. Weakness is in a driving wheel lo

19、ss adhesion, under the situation of another nor driving force.Open-die differential is the suitable scope that all paving road traffic, front axle and rear axle driver drive can be in stalled.2. Limited slip differentialLimited slip differential used for parts make up open-die differential transmiss

20、ion in off-road defects, it is in the open differential institution improved, and the differe ntial shell side in crease frictio n betwee n gear piece, corresp onding to the planetary gear set speaking, is the planet shelf and the sun round between in creased fricti on slices, in crease the sun whee

21、l and planet shelf free rotati ng resista nee torque.Limited slip differential provide additional torque, and friction slices transfer of power and two driving wheel rotation differenee of concerned.In open-die differential structure to improve on LSD, cannot produce 100% limited slip, because the l

22、imited slip coefficient, the higher the vehicles to the characteristics of the poor.LSD have open-die differential transmission characteristics and mechanical structure. Advantage is to provide certain limited slip torque, defect is turning performance becomes poor, friction slices limited life.LSD

23、is the suitable scope paving road surface and mild off-road. Usually used for the drive. Former drove gen erally does not installed, because LSD interfere steering, limited slip coefficient, the greater the steering the more difficult.Three. The lock type differential (mechanical locking check, elec

24、tric the lock, pneumatic locking check)In order to guarantee the off-road vehicles in complex conditions, driving performance through certain mechanical structure of the differential locked achieve two half axle synchronous rotation. Through the analysis of planetary gear set is the planetary gear s

25、et of gear mechanisms locked, guarantee the planet shelf wheel with the sun, and two SUNS round between the transmission ratio between is 1:1. Can the sun to the wheel and planet shelf the lock, can put the planet shelf and planetary gear locked, still can put two SUNS wheel locked.The lock type dif

26、ferential, without the lock, its transmission characteristics and open-die differential exactly the same as that in the lock, under the situation of transmission ratio was fixed for 1:1.The advantages of this differential in off-road self-evident that provides the biggest drawback is the driving for

27、ce, the differential lock up the situation, vehicle steering extremely difficult, Existing single wheel inherit engine 100% torque possible, half shaft will because torque excessive deformation or break, Vehicles in the process of steering bearings, two and a half by opposite torque, if both sides t

28、ires adhesion are large, would wring half axle. Moreover, this kind of differentials, the vehicle process execution lock up the action will produce larger noise.Four. Electronic differentials lockElectronic differentials lock and the aforesaid compared, without changing the structure and characteris

29、tics of open-die differential, but use ABS or EBD system to implement unilateral braking skid wheels movement, limit of two driving wheel rotation difference, guarantee the drive wheels momentum.Advantages: good safety, wont damaged vehicle. Faults: need ABS and costly;EBD system, In the harsh off-r

30、oad conditions, electronic product reliability as mechanical products; Unilateral wheel driving force, as the lock type differential.1, gear type differential:When driving wheel rotation differenee exists about when, differential assigned to slow turns driving wheel torque is greater than turn fast

31、driving wheel torque. This kind of differential torque partitioning characteristics can satisfy the car in good pavement moving. But when the automobile in bad the road, but serious in flue nee through capacity. E.g. when a car driving wheel into muddy road, although another driving wheel in good ro

32、ad, the car was often cannot advanee (known as slips). At this point in the muddy road on the driving wheels in-situ slip, in good road wheels is motionless. This is because in the muddy road wheels and road surface adhesion between the lesser, road only through this round of half-and-half shaft rol

33、e of smaller reaction torque, therefore d if fere ntial assigned to this round of torque also small, although another driving wheel and better road to improve adhesion of the larger, but because average distribution characteristics of torque, which make this drive wheels can only also assigned to the drive wheels with slip equal amounts of torque, so that the driving force to overcome driving resista nee, cars cant adva nee and motivati on is expe nded in slip driving wheel. At this time to floor not only made the car ahead, in stead of waste fuel, accelerate parts wear, especially tire w