| 摘要 |
<p>A service disc brake (1) for a heavy vehicle, which brake comprises a brake disc (2), a first brake pad (4) and a second brake pad (5) arranged on opposite sides of the brake disc (2), and a first displaceable piston (6) and a second displaceable piston (7) which are arranged to act on the first brake pad (4) and the second brake pad (5), respectively, and an actuator (12) for braking the brake disc (2). The disc brake comprises a third displaceable piston (9), the second piston (7) and the third piston (9) being connected to each other via a closed space (10) containing a hydraulic fluid. The braking actuator (12) being arranged to act on the first piston (6) and the third piston (9) for displacement of the first piston (6) towards the brake disc (2) and for displacement of the third piston (9) so as to displace the second piston (7) towards the brake disc (2) by means of the hydraulic fluid in the closed space (10).</p> |
