COUPLING OF DRIVING TWIN WHEELS FOR A DRIVE AXLE OF A VEHICLE

摘要

The invention relates to a coupling of driving twin wheels for a drive axle of a vehicle that is a useful application in vehicles used as means of lifting and moving materials, such as reach-staker for containers, forklifts, machinery for mining, vehicles used in harbors, etc. The coupling includes a fixed spindle (1), constrained to the supporting structure of the drive axle, on which a rotating element (10) is rotatably coupled with a coaxial arrangement, with a rim (4) of the first of said twin wheels firmly joined to the spindle. The rim (3) of the second of said driving twin wheels is firmly and coaxially joined to an element (14), which is retained axially in both directions, with respect to the rotating element (10), through thrust bearings (26) (27) and is in turn rotationally coupled, through a radial bearing (21), to an outer surface integral to the rotating element (10). Braking means (15) being provided which operate between the element (14) and a fixed annular element (28), that is integral with the spindle (1) and is provided with a coaxially movable annular piston (16) which acts, through the interposition of an axial bearing (25), against a movable annular element (23) to activate braking means 15. The movable annular piston (16) is pushed, with a predetermined axial load, against the said movable annular element (23) which is constrained in axially sliding manner, not to rotate with respect thereto, to a tubular body (13) which, in turn, is made integral to the rotating element (10).