ACTIVE WATER COOLING OF DRIVE MECHANISMS BY MEANS OF AN INSERTION DEVICE OF A SPECIAL GEOMETRICAL SHAPE WHEN DRILLING WITH A DIAMOND TOOL Russian patent published in 2020 - IPC B23Q11/10 E21B10/38 

FIELD: machine building; cooling.

SUBSTANCE: drive shaft (6) of machine (1), for example, a core drilling machine, is intended for connection with drilling tool (2), in particular drilling bit, and includes cavity (11), extending mainly along its entire length and along axis of rotation (M). Cavity (11) has at least one inflow hole configured to feed water (W) through the drilling tool therethrough along the drive shaft. In cavity (11) there is insertion device (14), made with possibility of water (W) passing through it for cooling of drive shaft (6) first in first direction (A), and then in second direction (B), wherein plug-in device (14) includes first bent guide element (13) and second bent guide element (15) intended for disconnection of water (W) passed in first direction (A) and in second direction (B). Area of cross section (Q1) of first bent guide element (13) is made point-symmetrical about central longitudinal axis M to area of cross section (Q2) of second bent guide element (15).

EFFECT: reduced damage of the machine as a result of heating.

6 cl, 7 dwg