| 摘要 |
A centrifugal brake for use with a hoist having a rope wound around a rope drum mounted on a support plate, includes a housing adapted for attachment to the support plate, the housing having a rope wheel mounted on one end of a shaft for rotation with the shaft. The housing is formed with a thru slot for allowing a load end of the rope to pass therethrough in a first direction as the rope unwinds from the rope drum. The rope is adapted to engage a peripheral surface of the rope wheel to thereby cause the rope wheel to rotate as a function of rope speed. The shaft has another end fixed to a centrifugal brake wheel having at least one pawl pivotably mounted thereon for swinging movement between inoperative and operative positions as a function of speed of rotation of the rope wheel. A cam is provided which is movable into engagement with the rope to stop movement of the rope through the housing upon movement of the at least one pawl to the operative position. |
