FRAME UNIT FOR AXLE-BOX SUSPENSION (VERSIONS) Russian patent published in 2001 - IPC

FIELD: underground railway. SUBSTANCE: invention relates to design members of bogies. Proposed unit has longitudinal box beam which rests on spring-loaded flange of bushing. Bushing in arranged in ring clearance between spring and tail spindle. Flange of bushing is secured to box and is provided with variable-section diametric projections and recess. Girth weld between nub of tail spindle and box beam is overlapped by flange of bushing welded to above-indicated hub and beam. Longitudinal weld of box beam is overlapped by diametric projections welded to lower side of box beam. Ring shock absorber is fixed in recess of bushing flange. Shock absorber engages with spring through step bearing. EFFECT: increased rigidity of box beam in zone of fastening of tail spindle. 3 cl, 4 dwg