| 摘要 |
<p>Wear warning device for indicating wear in brake lining and drum in drum brakes for motor vehicles with automatic brake adjustment. In a drum brake with a lifter and adjustement devices (5), comprising an internally threaded lifter head (7) and a lifter screw (8) screwed therein, the wear warning device comprises a switch means (20) supported by the lifter head, said switch means having an axially displaceable pin (22) in contact with the thread of the screw (8). The screw is provided at its distal end with a depression (26) in the thread. When the pin moves down into the depression, the circuit in the switch means is closed in order to activate a warning device.</p> |
