BREMSSCHUH-NIEDERHALTEVORRICHTUNG FUER EINE TROMMELBREMSE

摘要

A drum brake comprises a backing plate (2) having a rectangular hole (2a), and a brake shoe (1) disposed in front of the backing plate and provided with a web (3) having an opening (3a). A hold-down pin (4) is inserted into the opening of the web, the pin being provided at an end thereof with an engagement portion (4b) of rectangular shape. The engagement portion passes through the rectangular hole and is rotated by a predetermined angle, such as 90 DEG , for example, so that it is engaged with edge portions of the rectangular hole from the rear side of the backing plate. A hold-down cup (5) is engaged with, or integral with, a head portion (4c) of the hold-down pin, and a compression spring (6) is disposed between the hold-down cup and the web of the brake shoe. The head portion of the hold-down pin is provided with a groove (4d) having a predetermined positional relationship with respect to the longitudinal extent of the engagement portion. <IMAGE>