REVOLVING CONSTRUCTION MACHINE

摘要

PROBLEM TO BE SOLVED: To reduce overall weight including the weight of a grease bath by reducing the amount of lubricating oil to be stored in the grease bath and position the bottom plate of the grease bath on the inner periphery of an inner wheel by use of stud bolts, etc. SOLUTION: An annular stepped cutout 42B is formed in the inner wheel 42 of revolving wheels and bolt mounting holes 48 are bored in the lower end face of an internal gear 47 which becomes flush with the lower surface of the stepped cutout 42B. A stud bolt 50 is provided in such a way as to be threaded into each bolt mounting hole 48. To position the bottom plate 52 of a grease bath relative to the inner wheel 42, the outer peripheral edge 52A of the bottom plate 52 is butted against the lower surface of the stepped cutout 42B and under that state double nuts 58 are threadably fitted around the projecting end of each stud bolt 50 to clamp the outer peripheral edge 52A of the bottom plate 52 between the stepped cutout 42B of the inner wheel 42 and the double nuts 58.