초록 ▼

A limited slip differential gear mechanism, particularly for use with automotive vehicle axles, comprising differential side gears connected drivably to each of two driving axles for the vehicle. A pair of pressure plates splined to the carrier define a pair of opposed ramps. They are engaged by dif

A limited slip differential gear mechanism, particularly for use with automotive vehicle axles, comprising differential side gears connected drivably to each of two driving axles for the vehicle. A pair of pressure plates splined to the carrier define a pair of opposed ramps. They are engaged by differential pinions carried by a pinion shaft. The pinions engage each of the two side gears. A friction clutch assembly is situated adjacent each side gear. The pressure plates transfer an axial component of the thrust force created on the ramp surfaces as torque is transmitted through the pinions and through each side gear to each of two axle shafts. Each friction clutch assembly includes friction disks carried by the side gears and by the carrier so that a bias torque is established as one axle shaft overspeeds the other. A hydrostatic pump has one pump member connected to the carrier and another connected to one of the axle shafts. The hydrostatic pump creates a differential speed-sensitive bias which complements the torque-sensitive bias developed by the ramps.

대표청구항 ▼

[ What is claimed is:] [1.] A geared differential mechanism for delivering torque from a driving member to each of two driven members;a first side gear connected drivably to one driven member and a second side gear connected to the other driven member;at least one planetary pinion engaging drivably

[ What is claimed is:] [1.] A geared differential mechanism for delivering torque from a driving member to each of two driven members;a first side gear connected drivably to one driven member and a second side gear connected to the other driven member;at least one planetary pinion engaging drivably each side gear, a pinion shaft on which said planetary pinion is rotatably mounted;a differential carrier housing enclosing said side gears and said planetary pinion;at least one friction disk clutch pack having a first disk secured drivably to said carrier housing and a second disk secured drivably to one of said side gears;at least one pressure ring in said carrier housing surrounding said one side gear, a cam recess in said pressure ring defining a ramp surface, said one planetary pinion being disposed axially adjacent said ramp surface;axial thrust forces acting on said one side gear being transferred through said pressure ring to said one clutch pack thereby engaging said one clutch pack and creating a torque-sensitive bias in said differential mechanism;a positive displacement pump comprising a driving pump member connected drivably to said one driven member and a driven pump member connected drivably to said carrier housing; anda pump fluid inlet port and a pump fluid outlet port, a fluid delivery passage connecting said inlet and outlet ports whereby pumped fluid recirculates through said pump as said carrier housing and said one driven member rotate relative to each other, whereby a speed-sensitive bias is established in said differential mechanism, the total torque bias being the sum of said torque-sensitive bias and said speed-sensitive bias.