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1、外文资料翻译学生姓名： 李大玉 专业班级: 工程机械运用与维护 0802 指导教师： 朱桂英 河北工程大学机电学院 2011年 5月AbstractAs Chinas vehicle development, transmission and application updates the growing importance of the great role in society has become increasingly prominent. Human shift gearbox is a very important automotive components, use is a
2、lso very wide. The transmission gearbox is one of most important parts in the automobile transmission system structure，automobiles advance，the backlash，the growth rate，the deceleration must depend on the transmission gearbox transmission to realizeMoreover the transmission gearbox also has the very
3、important influence in automobiles power and the fuel oil efficiencyThis design is mainly gears size computation and the examination，the axis sizes calcul-ation and the positions determination. Completes the transmission gearbox unit chart，the first axis，the second axis,the intermediate shaft using
4、software AUTCAD,to keep off the gear and the synchromesh design one by oneKeywords: Car; Transmission; Gear Manual TransmissionManual transmission is the most basic transmission of a kind of type, its effect is changing gear ratios, and provide in reverse and neutral. Usually, the driver on the clut
5、ch pedal and manipulated by HuanDangGan can choose any gear in between. There are a few manual transmission, such as motorcycles gearbox, some car gearbox, only allow order, these transmission shift called sequence shift transmission. In recent years, with the electronic control components durabilit
6、y improvement, computerized automatic shifting clutch automatic shift in Europe since beginning row gearbox are also increasingly popular, car Volkswagen and ford vehicles will provide updates scenedesmus car in the dual clutch since beginning generation, transmission and has two rows of clutch, eve
7、ry time shift automatically switch to another group of unused clutch rapid meshing, do not need such as traditional in manual have to wait for the only after a group of clutch separate again shifting gear, faster and more small change gear vibration also. Transmission shaftDecorate a form of transmi
8、ssion shaft there are usually two shaft type and tri-axial type two kinds. Usually a rear wheel drive car will adopt three shaft type transmission, namely the input shaft, output shaft and oart. Input shaft front associated with engine, borrow clutch output shaft back-end through lugs associated wit
9、h universal transmission device. Input shaft and output axis in the same of horizontal line, with them is decorated oart parallel. Power through the gears from input shaft spread to preach to the output shaft oart again. In many transmission shaft and input output shaft could engage in together, so
10、power having been, at this time of gear called oart directly file. Direct files through uniaxial transmission, ratio of 1:1, the highest transmission efficiency. Even in cannot provide direct gear transmission, the input shaft and the output shaft is decorated in a line at work is helpful for reduci
11、ng also needed the torque transmission under. Reverse device Generally speaking, the slowdown will reverse than is greater than the gear. SynchronizerThe synchronous meshing variable speed is a synchronizer Settings, can make two gears before first reached in joints, such speed consistent synchroniz
12、er in all manual gear in the transmission already used.Clutch The clutch is can make two gears with combination of separate mechanical part, two gears can be combined, but cant transmit power variable speed, so must depend on the first two gear clutch apart, change gear ratio, put two gear combined,
13、 continue to transmit power. Compared with Automatic Transmission Here the automatic transmission of traditional hydraulic type refers to the automatic transmission, namely through hydraulic torque converter and planetary gear transmission power automatic transmission. Advantages : Transmission effi
14、ciency for high than automatic transmission may be more fuel-efficient, and of course in theory maintenance will be automatic gearbox cheap than if willing to use higher cost, can begin row since both hands since row of convenience and high efficiency. Faults : People will feel even when driving cyc
15、ling clutch shift very troublesome, not used to people will often on the street stall. Improper operation words have a chance to make the engine with gearbox trashed Manual gearbox mainly composed by gear and shaft through different combinations of gear speed torque; And automatic transmission by fl
16、uid torque twist AT machine, planetary gear and hydraulic control system composition, through hydraulic transmission and gear combinations of variable speed torque way to achieve. One fluid torque twist AT the most are the characteristics of components, it consists of pump wheels, turbine and keep-off device etc components, direct input of
