SLEWING CIRCLE Russian patent published in 1997 - IPC

FIELD: mechanical engineering; lifting and transportation facilities. SUBSTANCE: slewing circle has base, turnable with supporting device mounted on base and including spherical pivot and alignment members, and slewing motion drive mechanism. Turnable is installed on base for vertical displacement. Alignment members are installed between turnable and base and are made in form of horizontal rollers installed for rotation on base. Rollers are arranged higher than spherical pivot. Spherical pivot of turnable engages with step bearing installed on base and engaging with detachable jack. Slewing motion drive mechanism is made in form of removable screw rod hinge secured on base. Screw rod has meshing members engaging with pins uniformly spaced over circumference on upper surface of turnable. EFFECT: enlarged operating capabilities and enhanced reliability. 3 cl, 7 dwg