TURNING FRAME STRUCTURE OF CONSTRUCTION MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a turning frame structure of construction machine capable of ensuring joint strength without requiring the grinder finishing when an upper flange of a frame member forming a tail frame is welded and connected to side plates forming the center frame. SOLUTION: In the turning frame structure of a hydraulic shovel provided on a turning body 21 and constituted by welding and joining upper flanges 11c and 12c of I-beam members 11 and 12 as frame members included in the rail frame 2 to the side plates 6 and 7 included in the center frame 1, opening sections 11c1 and 12c1 are formed in the front end sections of the upper flanges 11c and 12c of the I-beams 11 and 12, the side plates 6 and 7 of the center frame are inserted in the opening sections 11c1 and 12c1, and the upper flanges 11c and 12c and the side plates 6 and 7 are respectively welded to form a welded part 17. COPYRIGHT: (C)2005,JPO&NCIPI