Center-driven mud scraper capable of automatically lifting rake

The utility model discloses a center-driven mud scraper capable of automatically lifting a rake. The scraper comprises a working bridge, a supporting frame and a scraper body. Pulleys are connected tothe lower portions of the two sides of the working bridge. A gear is mounted above the working bridge; a conveying chain is fixed to the right side of the gear. The right side of the conveying chainis connected with a main rotating shaft; a guide cylinder is fixed on the outer surface of the main rotating shaft; a mud collecting groove is formed in the surface of the outer wall of the flow guidecylinder, a mud suction pipe is installed below the mud collecting groove, a fixing support is arranged below the flow guide cylinder, a connecting rod is fixed to the inner surface of the fixing support, a pin rod is connected to the interior of the supporting frame, and the supporting frame is located below the fixing support. Compared with an existing common mud scraping and sucking machine, the center transmission mud