Working Principle of Differential Device 1. Straightly Drive: The left and right driven clutches (6) and (7) engage with cross (5) and middle engaging wheel (16). The power is transmitted to cross through main screw bevel gear and transmitted to left and right wheels through the side wheel to keep the same speed of left and right wheels. The engaging gear is engaged with driven clutch without clearance, meanwhile, the interior gears on the driven clutch keeping gear side clearance with the gears on the cross. 2. Non-straightly drive (e.g.
turn left) When the vehicle turning, the outside (right side wheel) wheel must rotate faster than the inside wheel (left side wheel), at that time, the left and right wheels (driven clutch) need keep different rotation speed due to the effect of ground resistance. Left and right driven clutches (6) and (7) are engaged with cross (5) through large gear side clearance. The driven clutch (6) is affected by the ground resistance and the gear side clearance, so it ensures the driven clutch rotates with the different rotation speed with the cross.
The ground resistance simultaneously applies into middle engaging wheel (16) and driven clutch wheel gear, this wheel gear slid and push the driven clutch forward outside. When this wheel gear stop slid and fix on two sides of wheel gear, the clutch gear will separate completely and the right drive clutch will freely rotate. So, the outside wheel will freely rotate when drive along curve and the power only just transmits to inside wheel. 20-47