Disc brake with high resistance to wear and thermo-mechanical strains

摘要

A disc brake (1) having a high resistance to wear and thermo-mechanical strains comprising a hub (2) from material having good characteristics of elasticity, mechanical resistance and elongation, and a braking strip (4) having a swept braking surface (5) from metal matrix composite material, produced as separate pieces and connected to each other by a restrained joint with tangential and axial constraints and free from any radial constraints. The tangential constraint is obtained by means of the insertion of projections (6) obtained on the external surface of the hub (2), in recesses (7) obtained on the internal surface of the braking strip (4) and constituted by two opposite side surfaces (8), flat and converging towards the rotation axis (3) and by a connecting surface (9) having an elliptic trend, whose smaller axis is such that said recess (7) does not interfere with the braking swept surface (5) and the greater axis is longer than the distance between said two side surfaces (8) in the connection point. The axial constraint is realised by means of plates (12) opposite and fixed to two projections (6) of the adjoining hub (2). <IMAGE>