Novel excavator arm structure for cleaning coal bunker of coal unloading ditch

The utility model discloses a novel excavator arm structure for cleaning a coal bunker of a coal unloading ditch, which comprises a camera and a protective cleaning mechanism matched with the camera, both the camera and the protective cleaning mechanism are arranged on a tail end machine arm of an excavator, and the length of the tail end machine arm is set to be 4-6m; the protective cleaning mechanism comprises a protective barrel installed on the tail end machine arm, a cleaning barrel embedded in the protective barrel, a driving gear, an electric telescopic cylinder fixed to the inner end of the protective barrel, a screw fixedly connected to the movable end of the electric telescopic cylinder and rotationally connected with the driving gear, and a rotating gear fixedly connected to the outer side wall of the cleaning barrel. The driving gear is in linkage with the rotating gear, and the camera is fixedly connected to the outer side end of the screw and arranged in the cleaning barrel. The excavator arm ca