There is provided a crane winch device allowing a suspended load to freely fall due to a load thereof. The crane winch device includes a winch drum around which a rope for suspending the suspended load is wound, braking brake unit that brakes the winch drum, speed-increasing unit that performs speed-increasing assist of the winch drum in a direction of free fall acceleration when a braking force of the brake unit is smaller than a first threshold, and an adjustment unit that adjusts the first threshold.
Crane winch device and crane
2021-11-02
Patent
Electronic Resource
English
IPC: | B66D Haspeln , CAPSTANS |
Crane winch protection device, crane and crane winch protection method
European Patent Office | 2020
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