Drilling machine structure

Abstract

A drilling machine structure is disclosed, characterized in which handles are arranged on the machine body for holding by the operator with both hands. Between the two handles there are assembled a power motor and a plurality of gear plates with different number of teeth to drive respectively center tip and spiral-shaped rotary blade at the lower part of machine body. The center tip and rotary blade are made of different materials in view of the drilling needs. As such, when drilling a hole, the drilling machine drills with the center tip in alignment with the hole center to guide the varying-speed cutters peripherally arranged at the very bottom of rotary blade to perform real rotary cutting and drilling, and the chips from the cutting are instantly and continuously brought to the surface through a lead hole disposed above each cutter under the driving of rotary blade, thereby achieving smooth drilling in different occasions.

1 . A drilling machine structure comprising a center tip and a spiral-shaped rotary blade at the lower part of the machine body, a plurality of cutters being disposed at the very bottom of rotary blade, and a lead hole being disposed at the top of each cutter; when drilling a hole, drilling with the center tip in alignment with the hole center to guide the cutters peripherally arranged at the very bottom of rotary blade to perform real rotary cutting and drilling, the chips from the cutting being instantly and continuously brought to the surface through the lead hole disposed above each cutter under the driving of rotary blade, thereby achieving smooth drilling. 
   
   
       2 . A drilling machine structure assembled with a power motor and a plurality of gear plates with different number of teeth inside the machine body for driving respectively the center tip and spiral-shaped rotary blade at the lower part of machine body, wherein the rotary blade being adjustable to produce varying turning speeds in line with actual needs. 
   
   
       3 . A drilling machine structure As claimed in  claim 1 , wherein a handle is arranged on each side of the machine body for holding by the operator with both hands. 
   
   
       4 . A drilling machine structure as claimed in  claim 1 , wherein said center tip and rotary blade are made of different materials in view of the drilling needs.