Patent ID: 8202189
Filing Date: 2012-06-19
Classification: F16H

Abstract:
1. A limited slip differential applied to a vehicle and driven thereby comprising: a differential casing interlocked to form a shared accommodating space for containing fluid; a driving plate disposed within said accommodating space for partially soaking in said fluid; said driving plate provided with a plurality pairs of openings substantially disposed therearound; wherein, each pair of said openings including a first opening and a second opening, and said first opening being communicated with said second opening; two backing plates respectively having inner sides thereof attached to both sides of said driving plate, wherein, each of said backing plates including a plurality of holes spaced apart thereon, and said holes being disposed correspondently to said first and said second openings; a plurality of differential gear assemblies mounted on said driving plate; each of said differential gear assemblies having a first differential gear embedded into said first opening and a second differential gear located within said second opening, so that said first differential gear and second differential gear relatively meshing with each other for permitting said fluid to enter interstices between respective edges thereof through said openings and said holes; and a transmission assembly engaged with said differential gear assemblies to synchronize therewith, and said transmission assembly providing with two sets of planetary gears respectively disposed on both exterior sides of said two backing plates and two sun gears separately meshing with said planetary gears; wherein, said two planetary gears respectively including a first planetary gear and a second planetary gear, and said first and said second differential gears penetrating through said correspondent openings and holes for separately engaging with said first and said second planetary gears; each of said sun gears having an axis provided with one side thereof fastening to said driving plate and with the other side thereof protruding out of said differential casing for mounting on two axle shafts of said vehicle, whereby said vehicle transmitting a dynamic torque to said limited slip differential for soaking said differential gear assemblies and said planetary gears within said fluid in sequence; at least one differential gear assembly creating a back pressure attributable to a rotational speed difference generated from said two axes of said sun gears in time of turning said vehicle being greater than a predetermined threshold , thereby avoiding passing said fluid between said differential gear assembly and resisting said first differential gear rotatively with respect to said second differential gear.