| 摘要 |
A ship winch for servicing davits, containing a multiple-speed propulsion motor with a built-over brake, equipped with a centrifugal governor and a sum planetary gear built in both a cable drum and a stopping brake and a two-way hand operation clutch, characterised by that it has a four-gear sum gear (6) whose first planet wheel (7) is connected with the second planet gear (23) by means of a gear coupling (8). |
