DEVICE FOR CONTROLLING POSITION OF EXTRACTING MACHINE Russian patent published in 2007 - IPC E21C27/32 

FIELD: mining industry, possible use for controlling position of extracting machine, in particular, plough plant or in complexes for underground extraction of mineral resources.

SUBSTANCE: device contains, mutually interconnected: moving hydro-jack connected to section of lining, pusher, which by means of horizontal axis is jointly connected to column of extracting machine, and controlling hydro-jack, cylinder and rod of which are provided with spherical heads, jointly mounted in sockets of, respectively, overhanging support of extractive machine column and pusher. At least inside one of sockets cylindrical recess is made, in which between spherical head and end of cylinder a bushing is positioned, prevented from moving along axis of recess and provided with at least one limiter, positioned with possible contact with surface of spherical head of hydro-jack during its folding. Internal surface of bushing is positioned with a gap around the neck of head, while distance between closer ends of cylinder and bushing is greater than length of mounting surface of bushing in socket. Inside the bushing, on the side adjacent to spherical head, a recess may be made limited with a ring, internal diameter of which is greater than diameter of spherical head, while mounted in recess of bushing are at least two limiters made in form of blocks, internal diameter of which is less than diameter of spherical head, and external diameter matches diameter of recess of bushing, while limiters are mounted with their possible extraction from recess of bushing after its removal from spherical head. On external surface of bushing a groove may be made, and in socket - two through apertures, perpendicular to axis of cylindrical recess of socket, wherein two shafts are located with possible contact with walls of groove in bushing.

EFFECT: lower laboriousness of device manufacture and increased reliability of device operation.

3 cl, 5 dwg, 1 ex