TRACK-LAYING CRANE Russian patent published in 2002 - IPC

FIELD: railway transport. SUBSTANCE: invention relates to devices for replacement of track and switch sections. Proposed track-laying crane has frame resting on running bogies, and truss with load-lifting equipment installed on frame by means of two pairs of posts. Posts are mounted on end sections of frame for turning by drive around vertical axis located in longitudinal symmetry plane of crane. Truss resting beams are cantilever mounted on each post. Truss rests on said beams through trolleys in upper parts of which curvilinear slots are made to accommodate curvilinear guides of truss. Upper parts of posts of each pair are intercoupled by beam bent in vertical plane and provided with hole in upper part. Hole accommodates pin secured in upper part of truss. Each said hole is made curvilinear and is arranged along corresponding beam bent in vertical plane. Each said pin is fitted in corresponding curvilinear for displacement along hole. Curvilinear surfaces of said slots differ in curvature, i.e. radius of curvilinear surface located far from center of curvature is greater than radius of curvilinear surface located close to center of curvature. EFFECT: possibility of operation of crane in both directions, improved load lifting characteristics, enlarged zone covered by crane in operation, reduced cost of work. 5 dwg