DRILLING DEVICE Russian patent published in 2015 - IPC B23B31/12 

FIELD: process engineering.

SUBSTANCE: invention relates to machine building and can be used for drilling of materials. Drilling device comprises drill with the case accommodating spindle and drilling chuck, clamping cone that turns coaxially with said body and holder of cams to be radially rearranged in actuating plate engaged with threaded bush coaxial with chuck axis and engaged with said body. Drilling spindle is composed of a hollow spindle with coupling bar fixed in threaded bush or engaged with said actuating plate to be fitted between clamped position whereat it is engaged with drill case and drilling position whereat it is fixed with drilling spindle. Coupling plate has bush clamped to drill case in clamped position and to drilling spindle at drilling spindle and makes a part of coupling bar.

EFFECT: simplified control.

17 cl, 13 dwg