DEVICE FOR COOLING LIQUID SUPPLY AND ELECTRIC DRILLING RIG WITH SUCH DEVICE Russian patent published in 2015 - IPC B28D1/14 B28D7/02 B23Q11/10 B23B51/06 

FIELD: machine building.

SUBSTANCE: group of inventions relates to machine building, and can be used during drilling of holes in concrete or stone with cooling liquid supply to the drilling part of the drill bit. The device for cooling liquid supply is connected to the electric drilling tool, and is made with possibility of the cooling liquid supply to the drilling part at far end of the drill bit. It contains the first flange element and second flange element located on the torsion shaft having common axle with the drilling bit. The first flange element is located at the drill bit side, and second element is further from the drilling bit along the torsion shaft, and is made with possibility of its lifting and lowering and has lock element. Between the flange elements there is space for cooling liquid injection. Between the first flange element and drilling bit the cooling liquid supply channel is located to direct the liquid to space to the drilling bit.

EFFECT: qualitative execution of drilling in small space using the battery drilling tool.

8 cl, 11 dwg