Reduction system applied to a wheel hub, and more particularly to a wheel hub connected to a differential of a goods vehicle

摘要

A reduction system applied to the wheel hub, of the type for use in a truck (1) or a goods transport vehicle is described, with at least one pair of side members (2) in the front part there being provided a cab (3) and between said side members the powertrain of the truck (1) consisting of the engine (4), gearbox (5), universal joint (7) which connects in rotation the output of the gearbox to the differential (6), said differential redirecting the rotation of the universal joint to the wheels (8) fixed on the related wheel hubs (12) by means of a pair of drive shafts (19). On each single wheel hub (12) as above a sun/planet type transmission device is inserted which, in the condition of the system being disengaged, causes a reduction of the transmission ratio between the rotation of the drive shaft (19) and the hub (12) and which, in the engaged condition of the system, transmits the rotation of the drive shaft (19) to the wheel hub (12) with a transmission ratio of 1: 1.