The input shaft is connected to the ring gear (blue); The output shaft is connected to the planet carrier (Green) which is also connected to a "multi-disk" clutch pack.
输入轴与齿圈（蓝色）连接，输出轴与行星架（绿色）相连，行星架上装有多片离合器。
2
Safety brakes have been used at low speed shaft of ladle cranes, especially of those with planetgear boxes. Safety brakes protect the main hoist effectively.