RUNNING GEAR FRAME OF SELF-PROPELLED LOAD-LIFTING CRANE Russian patent published in 1997 - IPC

FIELD: civil engineering; self propelled load lifting machinery. SUBSTANCE: frame, placed on chassis has base unit for slewing gear in form of truncated cone of height equal to height of longitudinal beams of frame. Bases of cone are coupled with webs of longitudinal beams and angle between generatrix of cone and its longitudinal axis is 0 < α < 45^°. EFFECT: increased rigidity of base unit over perimeter of slewing gear at minimum weight of frame, increased longevity and reliability of slewing gear. 2 dwg