Abstract: A sliding bearing assembly for joints of construction equipment can be provided, in which production cost is reduced by decreasing the used amount of Cu and sulfides having high fixability to a matrix are dispersed. The sliding bearing assembly for joints of construction equipment, includes at least a shaft and a bush made of an iron-based sintered material which functions as a sliding bearing, in which the bush has the overall composition of, by mass %, 0.1 to 10% of Cu, 0.2 to 1.2% of C, 0.03 to 0.9% of Mn, 0.36 to 1.68% of S, and the balance of Fe and inevitable impurities, a metal structure has pores dispersed in a matrix mainly including a martensite structure and sulfide particles precipitated and dispersed, and the sulfide particles are dispersed at 1 to 7 volume % in the matrix.

Abstract: A sliding bearing assembly for joints of construction equipment can be provided, in which production cost is reduced by decreasing the used amount of Cu and sulfides having high fixability to a matrix are dispersed. The sliding bearing assembly for joints of construction equipment, includes at least a shaft and a bush made of an iron-based sintered material which functions as a sliding bearing, in which the bush has the overall composition of, by mass %, 0.1 to 10 % of Cu, 0.2 to 1.2% of C, 0.03 to 0.9% of Mn, 0.36 to 1.68% of S, and the balance of Fe and inevitable impurities, a metal structure has pores dispersed in a matrix mainly including a martensite structure and sulfide particles precipitated and dispersed, and the sulfide particles are dispersed at 1 to 7 volume % in the matrix.

Abstract: The invention pertains to a bearing device used for a connecting part of a construction machine. The bearing device has: a boom having a boss part; an arm having left and right brackets that sandwich the boss part from the left and right sides thereof; a bush that is retained by an inner peripheral side of the boss part; a sealing that is disposed between the bush and the left and right brackets and that prevents a lubricant from leaking out of the bush; a thrust plate inserted between the left and right brackets and the boss part; and a coupling pin that penetrates and is inserted through the left and right brackets and the bush. The thrust plate has a partially cut out annular shape and an angle of a cut-out portion in the circumferential direction is less than 180° at an inner peripheral portion.