Patent ID: 8794393

Claim:
Disc-brake unit ( 10 ) for vehicles on rails, comprising a brake pincer consisting of a pair of jaws ( 14 ), provided with relative friction gaskets ( 16 ), intended to rub on the two opposite surfaces of a disc ( 12 ), said jaws ( 14 ) being hinged at one of the ends of a pair of levers ( 18 ), said levers ( 18 ) being pivoted on respective hinges ( 20 ) fixedly connected to the main body of said braking unit ( 10 ), and being actuated by a braking force motor ( 22 ) provided with at least one first piston ( 26 ) that moves with alternate motion along a first axis (A), said braking unit ( 10 ) also comprising a group ( 68 ) for automatically regulating the clearances between said friction gaskets ( 16 ) and said disc ( 12 ), characterised in that said piston ( 26 ) transmits said braking force to a thrusting mechanism ( 48 ; 48 ′) to amplify and transfer said braking force to said group ( 68 ) for automatically regulating the clearances, and said group ( 68 ) for automatically regulating the clearances transmitting said braking force along a second axis (B) perpendicular to said first axis (A) to the ends of said levers ( 18 ) opposite the ends on which the jaws ( 14 ) are hinged, wherein said group ( 68 ) for automatically regulating the clearances lies along the second axis (B) and comprises two clearance regulating mechanisms ( 70 ), positioned symmetrically with respect to said first axis (A) and operated along said second axis (B); and wherein each clearance regulating mechanism ( 70 ) comprises, in the portion facing towards said first axis A respective opposite locking bushes 82 84 and said locking bushes ( 82 , 84 ) are interconnected by means of a regulation screw ( 86 ).