DRILL WORKING MEMBER

摘要

mining, particularly, rotary drills. SUBSTANCE: drill working member includes mast with guides. Located on mast is rotary head movable carriage having guides and centering pressing rollers with hold-down members in the form of four hydraulic plungers whose rods are connected with centering pressing rollers for their constant pressing to mast guides. Said rollers are included into autonomous hydraulic system with hydraulic accumulator. Hydraulic system is located on movable carriage of rotary head. EFFECT: higher accuracy in collaring, and increased service life of working member. 3 dwg