Large gantry crane sliding assembly for wharf

The invention relates to the technical field of gantry cranes, and discloses a large gantry crane sliding assembly for a wharf. The assembly comprises a bearing mechanism, wherein a travelling mechanism is arranged in front of the bearing mechanism, a first rotating shaft is arranged at the bottom of the travelling mechanism, a travelling rail is arranged below the first rotating shaft, a second rotating wheel is arranged behind a first rotating wheel, and a first connecting block is rotatably connected to the outer surface of the second rotating wheel. A travelling structure moves to drive atravelling wheel to rotate, the travelling wheel rotates to drive the first rotating shaft to rotate and drive the first rotating wheel to rotate, a second rotating shaft drives a rotating plate to rotate inside a first connecting block, the rotating plate rotates to drive a fixed shaft to rotate, meanwhile a moving column rotates around the fixed shaft through a rotating ring, the rear end of themoving column rotates aro