【正文】 動比的計算和齒數(shù)的確定：按發(fā)動機的最大轉(zhuǎn)矩時的輸出轉(zhuǎn)速來確定傳動比，因而有 ?總i設(shè)輸出軸齒輪的齒數(shù)為 20輸出軸一級齒輪的齒數(shù)為 18輸出軸二級齒輪的齒數(shù)為 14齒輪的模數(shù)為直齒齒輪取 m=4，斜齒輪 m=變速箱內(nèi)一對常嚙合齒輪的傳動比為 ??Zi齒輪的材料為 40Cr,初選精度為 8 級。取力器一軸的強度校核： ； mZmrn ????? ?n ????? ；ma40mb60?所以 ?EILFfc 合格.~5.? . ???Ibafs rad???????EILF? 合格rad2.?mNMc ????. 217 2323 ????? ； 合格??240mN?????取力器二軸的強度校核： ； NmZr40216? ???rTFen ????nFNii2 ；a6b8162?所以 ????EILfc ~5.??IbaFfs rad?????????EIL? 合格rad02.?mNFMc ???16s ? 233 mNdMdWnsc?????? ； 合格??240mN?????齒輪彎曲應(yīng)力計算:直齒： ???yKzTfgw3斜齒： ???zmgw3os2?式中：—彎曲應(yīng)力（ ）w?2/NT —計算載荷（N我所設(shè)計的變速器為 5+1 檔專用汽車變速器。操縱機構(gòu)還設(shè)有自鎖和互鎖裝置。同時，運用MATALAB軟件編程，進(jìn)行校核。特別感謝 XXX 老師在這次畢業(yè)設(shè)計中給我的鼓勵、支持和幫助。附錄一外文翻譯A Short Course on a part of Automatic Transmissions The automatic transmission gearbox, as an important part in automobile driving system is used to make up the shorting of engine torque and rotary speed. It can change the vehicle speed and tyre torque in a big scope, cut off the power transfer from the engine, and also provides a reverse traveling direction for the vehicle. Therefore, the reasonability of the structure design of a transmission gearbox directly affects the vehicle39。 which causes the drive wheels to turn in the opposite direction allowing you to back up. Finally, there is the Park position. In this position, a latch mechanism (not unlike a deadbolt lock on a door) is inserted into a slot in the output shaft to lock the drive wheels and keep them from turning, thereby preventing the vehicle from rolling. There are two basic types of automatic transmissions based on whether thevehicle is rear wheel drive or front wheel drive. On a rear wheel drive car, the transmission is usually mounted to the back of the engine and is located under the hump in the center of the floorboard alongside the gas pedal position. A drive shaft connects the rear of the transmission to the final drive which is located in the rear axle and is used to send power to the rear wheels. Power flow on this system is simple and straight forward going from the engine, through the torque converter, then through the transmission and drive shaft until it reaches the final drive where it is split and sent to the two rear wheels. On a front wheel drive car, the transmission is usually bined with the final drive to form what is called a transaxle. The engine on a front wheel drive car is usually mounted sideways in the car with the transaxle tucked under it on the side of the engine facing the rear of the car. Front axles are connected directly to the transaxle and provide power to the front wheels. In this example, power flows from the engine, through the torque converter to a large chain that sends the power through a 180 degree turn to the transmission that is along side the engine. From there, the power is routed through the transmission to the final drive where it is split and sent tothe two front wheels through the drive axles. There are a number of other arrangements including front drive vehicles where the engine is mounted front to back instead of sideways and there are other systems that drive all four wheels but the two systems described here are by far the most popular. A much less popular rear drive arrangement has the transmission mounted directly to the final drive at the rear and is connected by a drive shaft to the torque converter which is still mounted on the engine. This system is found on the new Corvette and is used in order to balance the weight evenly between the front and rear wheels for improved performance and handling. Another rear drive system mountseverything, the engine, transmission and final drive in the rear. This rear enginearrangement is popular on the Porsche.Transmission Components The modern automatic transmission consists of many ponents and systems that are designed to work together in a symphony of clever mechanical, hydraulic and electrical technology that has evolved over the years into what many mechanically inclined individuals consider to be an art form. The cyeloid driveThe cyeloid drive has the essential advnatages sueh as Wide rnage of tranmsission ratio， eompact surtcture，high relibaility nad long wokrnig lief，So It gets borad application and its rsearch goes deep eonstnatly. The drive has been not only applied to traditionalt rnasmissionfield but also has alluring applieation in the aspeets of micro machine，robot gear ,preeision machine taansmission，super mini cycloid drive， asrtonaut cquipment，measurment apparatus，tenement intelligence and hightech equipment. In the family of the cycloid drive，the AFcycloid 一 pin wheel plnaetary driver educer is a new .Trnasmission with the mon cycloid drive，it has a series of advantages such as small volume，lihgtweight，wide range of tranmsission，diversity transmission，long lief time，high rigidiyt，high slewing precision，stbale preeision，high effieiency and stable design of the drive daopts a lot of advnaced theories and technology methoods and uses a kind of innovation stureurte，so the FA drive has overe the defect of the traditional surtcture，enhnaccd the transmissin efficency，volume,and the transmission precision. Automatic transmissions contain many gears in various binations. In a manual transmission, gears slide along shafts as you move the shift lever from one position to another, engaging various sized gears as required in order to provide the correct gear ratio. In an automatic transmission, however, the gears are never physically moved and are always engaged to the same gears. This is acplished through the use of plaary gear sets. One example of a way that this system can be used is by connecting the ring gear to the input shaft ing from the engine, connecting the pla carrier to the output shaft, and locking the sun gear so that it can39