重型载货汽车车型的驱动式采用4X2、6X4、6X6.驱动后桥是中央一级减速再加轮边行星齿轮减速的常规式驱动桥。按照不同的使用条件又分普通型和加强型两种，它们的结构和其它所有零部件都相同，只是桥壳壁厚不同。普通型桥壳壁厚为16mm,加强型桥壳壁厚为20mm.一般加强型桥壳常用在非公路用工程车型上使用。在驱动后桥的左半轴和差速器啮合套支承在左半轴花键轴上。当汽车行驶在泥路面而某一单边车轮打滑空转时，操纵差速锁开关，通过电磁阀使压缩空气通向差速锁工作缸，工作缸活塞推杆将通过拨叉使啮合套与啮合套啮合，从而使半轴与差速器壳成为一体，换句话说使左、右半轴成为一体，使汽车能平稳地驶出泥泞路面。驱动后桥采用轮边行星减速机构，用以提高速比，减小中央主减速器的尺寸，从而加大底盘的离地间隙，提高了汽车的通用性。动力由传动轴传递给驱动法兰1再传递给主动齿轮轴5，再经过被动齿轮20，传递给差速器。差速器由十字轴19、四个行星齿轮18和两个半轴齿轮17、23以及两半个差速器壳15、21组成。联接螺栓将两半个差速器壳15和21联接成为一体，因此在差速器壳旋转时，十字架同时旋转，行星齿轮产生公转，同时带动左、右半轴齿轮17和23旋转，从而由左、右两半轴将动力等扭矩地传递给左、右车轮。当汽车拐弯时，转向内侧车轮应比外侧车轮转动圈数少，由于扭矩的平衡关系，行星齿轮不仅公转而且绕十字轴产生自转，从而使两半轴齿轮差速，即转向内侧车轮少转多少，则转向外侧的车轮就同步多转多少，如此达到差速作用，保证汽车在转弯时在平稳。
The driving type of heavy truck is driven by 4X2, 6X4 and 6X6.. The rear axle is a central one speed deceleration plus planetary gear reducer. According to different use conditions, they are divided into two kinds: ordinary type and reinforced type. Their structure is the same as all other parts, but the thickness of axle housing is different. The thickness of the ordinary axle housing is 16mm, and the www.buxiuganfalan.cn www.diaosuoju.org.cn www.kaimianji.cn www.shusongjii.cn www.lianban.org.cn www.fujuanjii.cnthickness of the reinforced axle housing is 20mm.. Generally, the reinforced axle housing is usually used in the off-road engineering vehicle. The rear half axle and the differential engagement sleeve of the rear axle are supported on the left half shaft spline shaft. When the car is running on the surface of the mud road and a single side wheel is skidding and skidding, the differential lock switch is manipulated and the compressed air is led through the solenoid valve to the differential lock working cylinder. The piston push rod of the working cylinder will engage the meshing sleeve with the meshing sleeve through the fork, so that the semi shaft and the differential shell become one body, in other words, the left and right half axis will become the one. So that the vehicle can run out of the muddy road smoothly. The rear axle reducer is used to improve the speed ratio and reduce the size of the central main decelerator, thus increasing the clearance of the chassis and improving the versatility of the car. The power is transmitted from the drive shaft to the driving flange 1, and then transmitted to the driving gear shaft 5, and then transmitted to the differential gear through the passive gear 20. The differential is made up of 19, four planetary gear 18, 2.5 axis gear 17, 23 and two half differential shells 15 and 21. The connecting bolt joins the two half differential shells 15 and 21 into one, so the cross rotates at the same time when the differential shell rotates, the planetary gear generates a rotation, and the left and right half axis gears rotate 17 and 23, and the left and right two half axes transfer the power and other torque to the left and right wheels. When the car turns, the turning inside wheel should be less than the outside wheel. Due to the balance of the torque, the planetary gear is not only rotated but also rotates around the cross shaft, which makes the two half axle gear differential speed, that is, the inside wheel turns less and more, then the wheel of the steering is more and more, so that the difference speed is reached. The role of the car to ensure that the turn in the turn.