转向 驱动轴承（Steering drive bearing）.docVIP

转向 驱动轴承（Steering drive bearing） 18 to 8, the drive axle in the bearing why should pre tight? How to achieve pre tightening? Taper roller bearings preload: in the elimination of bearing clearance, and then to the bearing plus a certain axial preload. If the pretightening force is too small, the supporting rigidity of the shaft can not be satisfied; when the compression force is too large, the transmission efficiency will be reduced and the bearing wear will be accelerated. The active bevel gear bearing preload adjustment: the main reducer not installed oil seal, the required torque tightening pinion gear front nut, should be adjusted to M1 = 1 ~ 1.5N? M torque to the driving bevel gear rotate separately. In order to adjust the magnitude of the torque, an adjusting shim is arranged at one end of the isolating sleeve between the main shaft and the inner ring of the two bearing ring. If too tight, increase the thickness of the gasket; too loose to reduce the thickness of the gasket. The driven bevel gear bearing preload adjustment screw the adjusting nut, can adjust the supporting differential shell tapered roller bearing preload, the gear assembly, should be able to M2 = 1.2 ~ 2.5N? M torque (medium trucks, different models are different.) If the gap is too large, the driven bevel gear should be close to the driving bevel gear, and vice versa. In order to keep the preload of the differential tapered roller bearing adjusted, the number of turns at one end of the adjusting nut should equal the number of turns at the other end of the nut. 18-13. What are the features of the variable speed drive axle structure? What are the advantages of using a variable speed drive bridge in front and front drive axles? What are the different requirements of the vertical and transverse arrangement of the engine on the main reducer and gear pair in the variable speed drive axle? The characteristics of the variable speed drive axle are that the drive axle housing and the transmission housin