| 摘要 |
FIELD: mining; applicable in powered support of breakage faces in underground mineral mining. SUBSTANCE: powered support unit includes roofing, hydraulic props, two bases between which hinges and movable mechanism are installed and also two levers secured to each base for limited turning and engagement with movable mechanism, and hoisting jack hinged by means of rod with one of levers. Cylinder of hoisting hydraulic jack is hinged with the second lever. Plane of turning of levers and axis of hydraulic jack are square to direction of motion. EFFECT: use of one hydraulic jack for hoisting of both bases, higher operate reliability of hoisting mechanism and entire unit, extension of passage for miners in face space. 5 dwg |
