Importance

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Abstract

A differential lock-up assembly for vehicles with a differential gear set has a main drive housing, a driving pinion gear being rotatable in the main drive housing, a ring gear engaging the pinion gear, a planet carrier secured to the ring gear and rotatably supported in the main drive housing, a set of pinion gears journalled in the planet carrier and a set of bevel gears engaging the pinion gears and journalled in the planet carrier and engaged to output shafts of the differential gear set, and a lockout clutch assembly with a pack of interleaved discs locking the planet carrier to one of the output shafts on the impact of pressurized fluid with the intermediation of a piston and cylinder assembly. The improvement achieved by this invention is that a cylinder of the piston and cylinder assembly is arranged concentrically around a cylindrical extension of the planet carrier and is supported in the main drive housing by loose fitting, and the piston is split into a first piston and a second piston, one piston of which is rotatably arranged around said cylindrical extension of the planet carrier, and one of the pistons is engaged with the discs of the lockout clutch assembly and the other piston is supported axially to counteract its motion in opposite direction to the discs, and the pistons and the cylinder are disposable to each other in axial direction but fixed to each other against radial movement and they are sealed against each other, and the pressurized fluid is introduced into a sealed pressure chamber provided between the pistons and the cylinder.

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First Claim