Rotating Kingpost Crane With Load Equalizing Bearing

原文（中文）

A heavy-lift rotating kingpin slewing crane is disclosed having an upper bearing for a rotating kingpost crane which achieves equalized radial loading on all boom-side bearing rollers arranged in tandem on approximately a 120 degree arc segment of an upper radial bearing assembly when reacting the crane's operating load-moment couple-forces transferred from the rotating kingpost structure into the stationary kingpost housing at the upper bearing outer race surface. The bearing system comprises a concentrically nested set of load spreader bodies interconnected by pins and arranged to transfer the horizontal couple-forces from each side of the kingpost structure via a linkage to centrally located, largest spreader bodies which progressively reduce and transfer the load radially into smaller spreader bodies until an equal set of radial loads arrive on a set of bearing rollers.