DOUBLE CUP-SHAPED PISTON FOR A DISC BRAKE

摘要

The invention relates to a double cup-shaped piston (1) for a disc brake comprising an electromechanical parking brake device. The object of the invention is to permit an improved compromise between easier operability, rationalised component logistics in piston production, reduced hydraulic volume uptake in cooperation with the wheel brake periphery, and enhanced fatigue strength under maximum collective stress, in particular for heavy-duty applications of a disc brake with an electromechanical parking brake device. The problem is solved by the presence of a piston wall (2), which is provided, on the one hand, to sit with a free edge (3) on a rear plate (4) of a friction lining (5), and wherein the piston (1), on the other hand, comprises an integral dome (6) which forms an open receptacle (7) for an actuator (SV) arranged diametrically to the edge (3) of the piston (1).