Free fall disconnect

B - Operations – Transporting – 66 – D

Patent

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Details

B66D 1/24 (2006.01) B66C 23/62 (2006.01) B66D 1/16 (2006.01) B66D 1/30 (2006.01)

Patent

CA 2233536

A drum drive assembly for cranes which use a load hoist line reeled onto a load hoist line drum to lift loads allows the load hoist line drum to be disconnected from the drum drive motor to permit the load hoist line drum to rotate independent of the drum drive motor. The drum drive assembly comprises one or more motors for rotating the load hoist line drum to either pay out or reel in the load hoist line; a brake for slowing, stopping or preventing the rotation of the load hoist line drum; and a jaw clutch which may be disengaged to permit the load hoist line drum to rotate independently of the motor.

Mécanisme d'entraînement de tambour pour grues utilisant un câble de levage enroulé autour d'un tambour. Le mécanisme permet de déconnecter le tambour du moteur du tambour afin que ce dernier puisse tourner indépendamment du moteur. Le mécanisme d'entraînement du tambour est constitué d'au moins un moteur qui fait tourner le tambour, soit pour dérouler, soit pour enrouler le câble de levage; d'un mécanisme de freinage pour ralentir la rotation du tambour du câble de levage, ou arrêter ou empêcher ce dernier de tourner; d'un embrayage à griffes qui peut être désengagé pour permettre au tambour du câble de levage de tourner indépendamment du moteur.

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