Automatic sponge grabbing mechanism

The utility model relates to an automatic sponge grabbing mechanism which comprises a portal frame and a needling disc, the needling disc is installed below the portal frame, and the needling disc is driven by a walking mechanism to horizontally move along the portal frame and is driven by a lifting mechanism to vertically move. The walking mechanism comprises a frame, a driving wheel, a driven wheel and a lower clamping wheel, the driving wheel, the driven wheel and the lower clamping wheel are rotationally installed on the frame, the lifting mechanism comprises a lifting frame, a synchronous belt, a synchronous wheel and a lifting motor, and the needling disc comprises a supporting frame horizontally installed at the bottom of the lifting frame and a plurality of ejector pin units evenly distributed below the supporting frame in a matrix mode. Each ejector pin unit comprises two ejector pin row sets which are obliquely arranged in a staggered mode, and the two ejector pin row sets are movably installed on t