Shop Manual

20-47
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.