Drilling bucket anti-clamping device for drilling machine

The invention discloses a drilling bucket anti-clamping device for a drilling machine. The drilling bucket anti-clamping device for the drilling machine comprises a drilling bucket, a drilling connector, bucket teeth and a protective sleeve, the protective sleeve is arranged above the drilling connector, the drilling connector is arranged in the protective sleeve, the drilling connector is weldedto the upper end of the drilling bucket, the drilling connector comprises a square conic cylinder and a flange plate, the bucket teeth are welded to the lower end of the drilling bucket, the drillingbucket comprises a bucket neck and a bucket belly, and the bucket neck and the bucket belly are integrally casted and molded, and a small dip angle surface, a transitional surface and a large dip angle surface are arranged at the upper end of the bucket neck, the transitional surface is arranged at the transitional joint of the small dip angle surface and the large dip angle surface, the large dipangle surface comprises a