3.1.2 FINAL REDUCTION GEAR

3.1.2 FINAL REDUCTION GEAR

The final reduction gear is a planetary gear type consisting of a sun gear, planetary pinion gears and an internal gear, and it is installed on both ends of the axle housing. The sun gear is splined onto the axle shaft and locked with a snap ring. The planetary pinion gears are fitted to the shaft inside the planet carrier, which is secured to the wheel hub. The internal gear is splined onto the axle spindle through the hub.

The principle of power transmission is as follows: When the sun gear turns, the rotation is transmitted to the pinion gears and internal gear. However, since the internal gear is fixed to the spindle, the pinion gears revolve around the sun gear while spinning themselves.

The pinion gears are installed to the carrier which is fixed to the wheel hub, therefore, power of the drive shaft causes the wheel to turn.

INTERNAL GEAR SUN GEAR SHAFT PINION

Fig. 3.4 Final Reduction Gear

NOTE