| 摘要 |
A rotary slack adjuster (11) for use in a brake system of a vehicle (10) for compensating for wear in brake friction lining. The adjuster (11) includes an input arm (26) for connection to an actuating piston (25) of a brake actuator, an output arm (31) for connection to an output rod (24), and a rotatable member (49). Coupling device are provided for coupling the input arm (26), the output arm (31) and the rotatable member (49) together for mutual rotation during brake actuation in each of a first direction and a second opposite direction, while the rotatable member is confined to rotate between end limits in each of the first and second directions. The coupling device permits the input arm and the output arm to further mutually rotate in the first direction relative to rotatable member upon the rotatable member rotating to the end limit in the first direction. The coupling device further permits the input arm to further rotate in the second direction relative to the output arm and the rotatable member upon the rotatable member rotating to the end limit in the second direction at which end limit the coupling device prevents further rotation in the second direction of the output arm. The arrangement permits repositioning of the input and output arms relative to the rotatable member and by that mechanism results in a shift in the brake friction lining toward the braking surface, so compensating for wear in the friction lining. |
