| 摘要 |
<p>This electric hoist incorporates a wedging-groove pulley controlling a free-end wire-rope and comprises an epicyclic reducing gear surrounding the motor output shaft and providing a high reduction ratio with a minimum axial length; the gear comprises a sun wheel rigid with the motor shaft, planets meshing with this wheel and also with two internally toothed annuli having different tooth numbers, namely a fixed annulus and a driven annulus rigid with the wedging pulley coaxial with the motor shaft.</p> |
