RAILWAY VEHICLE TWO-AXLE BOGIE Russian patent published in 2007 - IPC B61F3/04 B61F3/08 

FIELD: railway transport; two-axle frameless bogies.

SUBSTANCE: proposed bogie has wheel-sets 1 with axle boxes 2, upper and lower longitudinal beams, 5 and 4, respectively, made in form of leaf springs whose ends are coupled with axle boxes for displacement in three directions relative to wheel-sets, and cross beam 3 rigidly coupled by ends with longitudinal beams in their middle part. Bogie is furnished with brackets 11 with metal rollers 12 installed on axle boxes and connecting axle boxes with longitudinal beams, and additional longitudinal beams 6 in form of leaf springs rigidly coupled by middle part with ends of cross beam. Ends of additional longitudinal beams are in free state, resting on metal rollers of axle-box brackets only when car is loaded, lower longitudinal beams are curved reverse to radius relative to upper and additional longitudinal beams. Longitudinal and additional longitudinal beams are made of composite materials.

EFFECT: reduced vertical and side oscillations of bogie of loaded car, improved reliability and safety.

2 cl, 4 dwg