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1、附 录AThe structure of driving axleThe driving axle is in the power power transmission the terminal, its basic function increases the torque which transmits by the drive shaft or the transmission gearbox, and power reasonable assignment for left and right driving gear, moreover also withstands the fun
2、ction vertical sets up, the longitudinal force and the transverse force between the road surface and the frame or the automobile body.The driving axle generally by the main gear box, the differential device, the wheel transmission device and the driving axle shell and so on is composed.1.Driving axl
3、e design：The driving axle design must satisfy following basic request: 1). Choice main reduction gear ratios ought to be able to guarantee the automobile has the best power and the fuel economy. 2). External dimensions must be small, guaranteed has the necessity ground clearance. 3). Gears and other
4、 transmission piece works do steadily, the noise is small. 4). Has the high transmission efficiency under each kind of rotational speed and the load.5). Under the guarantee enough intensity, the rigidity condition, should make every effort the quality to be small, under the reed the quality should b
5、e as far as possible small in particular, improves the automobile smoothness. 6). Coordinated with the suspension fork guidance organization movement, regarding changes the driving axle, but also should coordinate with the rotation gear movement.7). Structures are simple, the processing technology c
6、apability is good, the manufacture is easy, disassembling, the adjustment is convenient.2.Driving axle classificationThe driving axle minute non-separation type with separates the type two big kinds. 1).Non-separation type driving axleThe non-separation type driving axle also is called the integral-
7、type driving axle, its rear axle drive pipe and main gear box shell with shaft casing rigidly connected whole Liang, thus the both sides rear axle and the driving gear swing related, passes the elastic part and the frame is connected.It by the driving axle shell 1, the main gear box, the differentia
8、l device and the rear axle is composed. 2). Separation type driving axleThe driving axle uses the independent suspension fork, namely the main gear box shell fixes on the frame, the both sides rear axle and the driving gear can be opposite in the rolling plane in the chassis have the relative motion
9、 to be called the separation type driving axle. In order to coordinates with the independent suspension fork, fixes the main gear box shell in the frame (or automobile body) on, the driving axle shell partition and through the hinge joint, or no longer has the driving axle shell other parts besides
10、the main gear box shell.In order to meet the need which about the driving gear independence beats, between the differential device and between wheel rear axle each section connects with the universal joint.3.Drive axle of compositionMainly by the reducer drive, and half axle and drive axle shell, et
11、c.1) .Main reducerThe speed reducer is usually used to change the direction of transmission, reduce speed and increase torque, guarantee cars have enough force and appropriate speed. Main reducer, have more single type, double, double speed reducer, wheel edges.a). Single main reducerBy a reduction
12、gear reducer realization of single reducer, called. Its simple structure, light weight, dongfeng BQl090, light, medium sized truck was widely used in automobile.b). Double main reducerIn some large trucks, load demand is bigger than the slow, with single main reducer drive, driven gear diameter incr
13、eases, affect to the ground clearance drive, so using twice. Usually called doublestage reducer. Two groups of double reduction gear reducer, increasing torsional twice slowdown.To improve the tapered gear pair of meshing smoothness and strength, the level of spiral bevel gears reduction gear pair i
14、s. Second gear pair is helical gears for support.Active tapered gear rotating, drive driven circular gear rotating, thus completing silver. Level Article 2 the initiative of cylindrical gears and driven tapered gear coaxial and rotate together, and bring about a follower of cylindrical gears rotate,
15、 2. Because a follower of cylindrical gears installed in differential shell, so, when a follower of cylindrical gears turning, through the differential and half shaft is driven wheel rotation.2).DifferentialAround half shaft are used to connect differential wheel, can make the sides with different v
16、elocity rotating torque simultaneously. Ensure the normal scroll wheel. Some more, in the car driver bridge or in the breakthrough of thansfer transmission shaft with differential between, also called the bridge between differential. Its role in the car is in turn or flat road to drive wheels, and generate differential between the role.Current domestic cars and other cars are adopted symmetric bevel gear ordinary differentia
