SCHEIBENBREMSE FUER FAHRZEUGE

摘要

The disc brake with a brake yoke (2) straddling a brake disc (1) has a tensioner on one side. The tensioner comprises a cam lever (4) which can be rotated about an axis parallel to the brake disc plane and co-operates with a cross-piece (6). The ends of the cross-piece (6) are screwed to adjusting spindles (7, 8) on which bears a brake pad (10). The two adjusting spindles (7 and 8) are coupled via a toothed belt (12). Into recesses in the two adjusting spindles (7 and 8) projects a rotary drive (14 or 14') which can be driven by the cam lever (4) and cause the adjusting spindles (7 and 8) to be screwed in the direction of approach to the brake disc (1) during the application or release movement. The synchronised operation of both adjusting spindles (7 and 8) is thus produced via the toothed belt (12). The rotary drive (14) contains a one-way rotary coupling and a torque-limiting coupling which prevents the adjusting spindles (7 and 8) from rotating during the application and release movements. The dual arrangement of the rotary drives (144 and 14') provide redundancy so that, if one rotary drive (14 or 14') should become ineffective, the clearance adjustment function is maintained and the disc brake cannot fail as the pads subsequently wear.