| 摘要 |
<p>A drum drive assembly (80) for cranes which use a load hoist line (46) reeled onto a load hoist line drum to lift loads allows the load hoist line drum (48) to be disconnected from the drum drive motor (82) to permit the load hoist line drum (48) to rotate independent of the drum drive motor (82). The drum drive assembly (80) comprises one or more motors for rotating the load hoist line drum (48) to either pay out or reel in the load hoist line (46); a brake (90) for slowing, stopping or preventing the rotation of the load line drum (48); and a jaw clutch (88) which may be disengaged to permit the load hoist line drum (48) to rotate independently of the motor (82). <IMAGE></p> |
