分动器外文翻译.docx

题 目： 汽车分动器外文翻译 学 生： 黄开萍 指导教师： 曾清德 学 院： 职业技术教育学院 专业班级： 交通运输（汽车电子检测与维修）2009级2班 汽车分动器外文翻译 brief introductionActuator is a gear transmission system, the input shaft directly or through the second shaft, the transmission device and the transmission output shaft, has several, respectively, by the universal transmission device and the driving bridge. When the actuator hang into the low gear, the output torque is large.To avoid a rear axle overload axle must participate in the drive, to share part of the load.The motion control mechanism must guarantee: non first connected to the front axle, shall hang into the low gear; not to withdraw from the low-profile, do not take off the front axle.A drive car, when all wheel drive driving on uneven road surface or curve, or the front and rear driving wheels with tyre wear and running conditions of different radii, will cause the wear of engine power consumption, tire or transmission system parts.In order to overcome this shortcoming, the torque roughly according to the axle load proportion to the drive axle, some power divider is arranged with differential lock asymmetric planetary gear shaft of the speed difference between the SUV will often run in no roads and bad situations, especially military vehicle condition is worse, this it should increase the number of vehicle wheel, therefore, off-road vehicle use multi-axis drive.For example, if a front-wheel drive vehicle two wheel will both fall into the ditch (in this case, the bad roads often encountered), the car will not be the engine driving force through the friction wheel and the ground and continue to move forward.And if the four wheels of the car can have a driving force, then, there are two have not fallen into the ditch the wheel can work normally, the car continued to travel.In order to increase the transmission coefficient of maximum transmission ratio and file number, at present most of the cars are fitted with two gear actuator, which also plays the auxiliary transmission function.The first automatic transmission is a Benz Corp in 1914 launched the first, Chrysler 1914 launched with hydraulic coupling four speed semi-automatic gearbox.Automatic actuator includes four basic systems of typical: torque converter, planet gear mechanism, hydraulic system and actuatorFunctionIn the multiple spindle actuation automobile, in order to power output to the drive axle is provided with a power divider.Actuator usually with high and low, in order to further expand the number of transmission ratio and gear driving in the difficult area of.Sub-actuator function is the allocation of power transmission output to the drive axle, and further increase the torque.Actuator is a gear transmission system, which separately fixed on the vehicle chassis, the input shaft and the output of the transmission shaft gear connected with universal joints, sub-actuator output shaft has a plurality of, respectively, via the universal transmission device connected the driving axleMost actuator due to play down the role of increasing moment rather than transmission of the load, so the dynamic constant mesh gear in the helical gears, bearings and the bearing tapered roller bearingPrincipleActuator for each axis with two tapered roller bearing, the bearing tightness with the corresponding adjustment pad.Off-road vehicle in good road, in order to reduce the power consumption and transmission parts and tyre wear, to cut off the front axle power.When driving off-road, for low power, to prevent the rear bridge and the bridge overload, should make the low power to share by all driving axles.Therefore, the dynamic control mechanism has the following requirements: not the first connected to the front axle not to hang up to speed, not to withdraw from the low speed, do not take off the front axleCommon faultNeutral hair.The crankshaft and the first axis misalignment;Second shaft bearing wear, oil, pilling;Constant mesh gear problem (wear uniform sound or individual tooth chipped regular gap impact sound);Constant mesh gear repair unpaired replacement, meshing;The first bearing damage, or old gear change gear.Gear ringGear change improper; differential gear or half axle gear keyway worn loose;The main, driven bevel gear clearance is too large; the driven bevel gear loose.FeverBearing too tight and / or gear gap is too small;The lack of Random fileTransmission control the amount of compression springs are not up to the requirements;Shift rod interlock pin wear.Jump file gear oil, gear oil viscosity is too small or Positioning device failure (gear shift fork groove or ball wear loose, positioning spring is too soft or broken);Gear wear, along the direction of the tapered tooth;The transmission shaft, bearing wear or axial clearance is too large, so that the shaft rotates beating or movement.Sub-actuator classification and buggies actuato With the actuator in the multiple spindle actuation automobile, it is located in the transmission chain between the transmission and driving axle, is used to increase the torque transmission output, to expand the range of speed, and the torque distribution to the drive axle.Actuator type and its characteristics: from the structure and function of view, actuator can be divided into two categories.1, the general gear actuatorGeneral gear actuator drive the two output shaft front, rear axle, drive in the joint of gear sets for rigid connection.This type of actuator is simple in structure, the past is widely used in all kinds of wheel drive car, the drawback is not the front, rear wheel ground speed equal to, in the running process inevitably produces power cycle phenomenon, this will make the driving wheel load increases, the tire and mechanical wear intensifies, fuel economy decline.Therefore, in the pneumatic separation device front axle drive another device (model), can be engaged in the automobile front axle through the slippery roadIn addition, the general gear type torque proportional actuator assigned to front, rear axle indefinite (along with the two bridge by adhesion ratio and variable).Although this will increase the adhesio