| 摘要 |
The hoisting device includes supporting components (2, 3, 4, 26) for rotational support of a pulley (5, 6, 9) with a peripheral notch suitable for the respective rope (10), braking mechanisms (19) 20, 18) of the pulley (5, 6, 8) including first braking mechanism (19, 20) fixed to it and designed for receiving a second braking mechanism (18) supported by components (2, 3, 4, 26). The second braking mechanism (18) is connected to a velocity determining facility (13, 14, 15) which controls its action on the first braking mechanism (19, 20) when the peripheral speed of pulley (5, 6, 9) exceeds its preset value. Pulley (5, 6, 9) has a central part (5, 6) supplied with at least one coupling surface (7) to which a separate crown component (9) of the pulley with the peripheral notch is fitted. 14 claims, 10 figures
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