Drilling tool

Abstract

A drilling tool is disclosed. The drilling tool has a shaft and a pot-shaped base body. Chisel cutters are inserted into the annular front surface of the base body which is open on a drilling side. At least one suction opening is provided offset radially from an axis of the hammer core bit in the base of the base body facing away from the drilling side. The drilling dust can be suctioned out of the base body through the suction openings.

1 . A drilling tool, comprising:
 a shaft disposed on an axis of the drilling tool;   a base body with an annular front surface and a base; and   a suction opening in the base that is offset radially from the axis.   
     
     
         2 . The drilling tool according to  claim 1 , wherein the suction opening runs in a drilling direction toward the axis. 
     
     
         3 . The drilling tool according to  claim 1 , wherein the shaft abuts the base with a conically widening foot and wherein the suction opening runs through the foot. 
     
     
         4 . The drilling tool according to  claim 1 , further comprising a plurality of chisel cutters inserted into the annular front face and wherein the plurality of chisel cutters are made of hard metal. 
     
     
         5 . The drilling tool according to  claim 4 , wherein the plurality of chisel cutters have cutting surfaces, wherein the cutting surfaces of a group of the plurality of chisel cutters are oriented radially to the annular front surface, and wherein the cutting surfaces of another group of the plurality of chisel cutters are oriented tangentially to the annular front surface. 
     
     
         6 . The drilling tool according to  claim 1 , further comprising a centering drill arranged on the axis within the base body. 
     
     
         7 . The drilling tool according to  claim 1 , wherein the suction opening is arranged at a distance from the axis that is between 30% and 70% of a radius of the base body. 
     
     
         8 . The drilling tool according to  claim 1 , wherein a maximum of five suction openings are provided. 
     
     
         9 . The drilling tool according to  claim 1 , wherein a suction tube is arranged coaxially to the shaft and abuts the base. 
     
     
         10 . The drilling tool according to  claim 9 , wherein an outside diameter of the suction tube is less than an outside diameter of the base body. 
     
     
         11 . The drilling tool according to  claim 9 , wherein the suction tube has an elastic bellows and wherein an annular end of the elastic bellows abuts the base at least in sections. 
     
     
         12 . The drilling tool according to  claim 9 , wherein the suction tube has a plurality of first sections and a plurality of second sections circumferentially on an annular front surface, wherein the plurality of first sections projects a different distance from the annular front surface than the plurality of second sections. 
     
     
         13 . The drilling tool according to  claim 12 , wherein the plurality of first sections are arranged over 10% to 20% of the annular front surface. 
     
     
         14 . The drilling tool according to  claim 9 , wherein ribs projecting toward the axis are arranged within the suction tube. 
     
     
         15 . The drilling tool according to  claim 9 , wherein a front end of the suction tube defines an opening in the suction tube. 
     
     
         16 . The drilling tool according to  claim 15 , wherein a front surface of the suction tube is flat and wherein the front surface abuts the base.