Material taking system and ship unloader

The invention relates to the technical field of ship unloading mechanical devices, in particular to a material taking system and a ship unloader. The material taking device is arranged, the chain bucket arm is suitable for swinging around the rotating shaft, meanwhile, it is guaranteed that main loads borne by the material taking device are all in the plane where the material taking device is located, stress is more reasonable, operation reliability is improved, and faults caused by too large stress of the chain bucket arm are avoided. A trolley propelling system is arranged to drive the running trolley to move, when the running trolley is subjected to external acting force in the advancing direction or opposite to the advancing direction, the stress of the material taking device in the ship width direction is larger than a preset threshold value, and therefore transmission of driving power of the running trolley is cut off; the acting force cannot be transmitted to driving equipment of the running trolley, s