Fluctuating gear ratio limited-slip differential

Details Fluctuating gear ratio limited-slip differential Fluctuating gear ratio limited-slip differential

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 48/20 (2006.01) F16H 48/08 (2006.01) F16H 48/28 (2006.01)

Patent

CA 2423546

This invention relates to a type of fluctuating gear-ratio limited-slip differential, the object of the invention is to provide a type of differential which is characterized by larger fluctuating range in gear ratio and higher torque bias ratio. By means of periodic fluctuation in the gear ratio between the planet and side gears, the torque distribution between two side gears becomes a periodic function of the angle of the angle of. rotation of the planet gears, so that the slip on one side of the driving wheels is limited. The differential comprises a differential case, a cross or straight pinion shaft fixed within the differential case, plural pinions, and a pair of side gears situated within the differential case engage with the pinion gears with fluctuated gear ratio, the period of the gear ratio between the pinion and side gears involves at least two pitches, and the number of pitches involved in each period are corresponding to the common factor in the number of teeth in both pinion and side gears. Each period of the gear ratio fluctuation involves a group of teeth, and the number of teeth involved in each group are corresponding to the number of pitches involved in each period, the combined working range of the teeth involved in each group covers the whole working range of both the pinions and side gears involved in a period of gear ratio. This invention is particularly suitable for off road vehicles, tippers, wheeled loaders and bulldozers, and other kind of wheeled civil engineering machinery.

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