DIRECT FIXATION RAIL FASTENING FOR TRACK ON REINFORCED CONCRETE BASE Russian patent published in 2007 - IPC E01B9/28 E01B9/44 

FIELD: railway transport; permanent way.

SUBSTANCE: invention relates to devices for attachment of rails to reinforced concrete base of main tracks with heavy axial loads and sections of small - radius tracks and street car tracks. Proposed rail fastening contains wedge-like clamps with longitudinal oval holes for horizontal shifting. Oblique oval cut for self-locking is made in rear part of wedge-like clamp. Wedge-like clamps are provided with oval step in lower part for fixing inoperative position when fastening bolts are backed off. Fastening bolts are furnished with spring and safety washers with tab to preclude self-loosening of fastening bolts and spontaneous getting of wedge-like clamps from working position. Two-flange baseplate is arranged under rail gasket in flanges of which oval wedge holes are made to fasten rail by wedge-like clamps. To adjust track gauge, flanges of baseplate are made with displacement to one side relative to axis of holes for fastening bolts. Oblique projections for self-locking of wedge-like clamps are made on ends of two-flange baseplates. Two-flange baseplate is provided with numerical marking at opposite ends showing rail gauge. Shock-absorbing gasket is arranged under two- flange baseplate. Coaxial holes are made in two-flange baseplate and shock-absorbing gasket through which fastening bolts pass being turned into threaded insulated anchor bushings mounted in concrete base of tie.

EFFECT: improved reliability and increased service life of rail fastening.

1 dwg