GUIDE FOR PULLING CHAIN OF MINING MACHINE Russian patent published in 2012 - IPC E21C27/34 E21C29/04 

FIELD: mining.

SUBSTANCE: guide for pulling chain of mining machine, namely for chain of plough on mining plough with drive stations and/or rotary sprockets of pulling chain (11), which are installed in end sections of mining machine, and at least with one element (21; 121) of the guide for chain, which are spatially located near chain sprockets (18) on drive station and/or turning station and pressed across chain movement direction to its load and/or empty branch. Element (21; 121) of chain guide includes at least one pressure roller (22; 122) pressed to links (33) of pulling chain (11); at that, pressure roller (22; 122) is installed on roller axis (29; 129) with possibility of rotation and replacement together with it. Axis (29; 129) of pressure roller (22; 122) rests on brackets (28, 28A; 128) of bearings, which are installed in receiving pocket (40; 140); besides, brackets (128) of bearings in receiving pocket (140) are protected against unfixturing at least by means of one retractable fixture (190). Pressure roller (22; 122) has bearing race (23) matched with enveloping surface (34) determined with links (33) of the chain. Pressure roller (22; 122) is arranged in lead-in unit (25; 125) installed in inlet section (19) of drive station and/or turning station (17) with possibility of being replaced. Brackets (28, 28A; 128) of bearings are installed in receiving pocket (40; 140) with possibility of being replaced. Brackets (28, 28A) of bearings in receiving pocket (40) are protected against unfixturing by means of a hinged cover (35). Upper bracket (128) of bearing is equipped with guides (173) for retractable fixtures (190). Above receiving pocket (140) there installed are retaining units (166) with fixing seats (165) facing each other, and retractable fixtures (190) have fixing projections (198) which are locked in fixing seats (165) to protect upper bracket (128) in receiving pocket (140) against unfixturing. Guide includes pair of retractable fixtures (190); at that, each retractable fixture (190) has U shape with base (191) and three elbows of which one extreme elbow (193) and intermediate elbow (194) on outer sides facing each other are equipped with guide planks (195, 196) to be installed in guides (173) with form closure, and the second extreme elbow (192) has passage opening (199) for locking bolt. At the bottom of receiving pocket (14) there located is lower seat (155) for roller axis (129), and is mainly made in lead-in unit (125) as a part of it or rigidly attached to it. Guide includes several pressure rollers pressed or to be pressed to chain (11) and located one after the other in chain movement direction. Pressure roller (22) is pressed to chain under action at least of one elastic element. Pressure roller (22) is pressed to the chain under action at least of one shock absorber.

EFFECT: improved wear resistance of the chain.

12 cl, 7 dwg