| 摘要 |
FIELD: mining. ^ SUBSTANCE: invention refers to boring, particularly to tail piece actuated by, at least, rotation and/or percussion of tool. The tail piece consists of, at least, one locking slot closed on an axial clamping end in axial direction to a free end, and similar, of drive slots of torque transfer with slot width (B), and, of at least, one contact surface of tangential force; also, at least, two drive slots of torque transfer have length (L) corresponding to threefold value of diametre (D) and are located before the axial clamping end of the tool side; they are made wider, than 1/5 of guiding diametre (D) and with, at least, 1.5 fold value of length of guiding diametre (D) along whole contact length (K). ^ EFFECT: facilitating trouble-free transfer of high torque and optimal transfer of percussion pulse. ^ 11 cl, 5 dwg |
