METHODS OF FREIGHT CAR BOGIE UPGRADING Russian patent published in 2020 - IPC B61F3/02 B61F5/12 B61F5/14 B61F5/16 B61F5/26 B61F5/52 

FIELD: transportation.

SUBSTANCE: group of inventions relates to the field of railway vehicles, in particular to methods for modernization of freight car bogies. Diameter of center plate is bored in case of bolster center plate upgrading. A wear-resistant ring is installed in space of increased diameter. Flat bearing insert is installed on bottom surface of center plate. When upgrading the side supports, the height of the support plates is reduced and a bearing plate is welded onto them. Mounting surface of the plate is milled to the required height and holes for attachment of side supports are drilled. On the prepared surface side supports are installed and fixed. When upgrading the pockets of the bolster, wear resistant plates are welded on the vertical side surfaces of the pockets. Inclined wall of the pockets is made at angle of 40–50° and a wedge insert is welded thereto to interact with mating surfaces of wedges. During modernization of friction wagon hinge friction wedge is made in the form of pair of symmetric friction wedges mounted on two-row spring. Inclined walls of wedges are made with mating surfaces of wedge insert fixed in pocket of bolster. When retrofitting axle box axle openings, thrust pads are made in form of interconnected resilient metal plates. Pad is fixed on frame by arrangement of mounting brackets ends in mounting holes of side frames. Mounting brackets are fixed in middle part of support plates.

EFFECT: improved dynamic characteristics of freight car.

11 cl, 14 dwg