Patent ID: 7748908

Claim:
A bearing device comprising: a pair of bracket members; a boss member arranged between said pair of bracket members; a first bushing fitted into an inner peripheral surface of said boss member, the first bushing including a pair of bushing portions axially spaced apart from each other; second bushings fitted into inner peripheral surfaces of said pair of bracket members; a connection pin inserted into said first and second bushings slidably relative to each other, and connecting said pair of bracket members and said boss member so that said pair of bracket members and said boss member can rotate relative to each other; a pair of oil storage chambers arranged at both ends of said connection pin, to store lubricating oil; an oil feed channel formed in said boss member in the radial direction; an oil storage portion communicated to said oil feed channel, and formed between an outer peripheral surface of said connection pin and a surface of said boss member along a peripheral direction, the oil storage portion being an annular groove defined by an axial gap formed between the bushing portions of the first bushing and the inner peripheral surface of the boss member; a pair of first sealing members arranged at axial outer sides of said first bushing to seal the lubricating oil that is filled through said oil storage portion in between said first bushing and said connection pin; a first channel formed inwardly in a radial direction from the outer peripheral surface of said connection pin; a second channel formed along the axial direction of said connection pin, and communicating between said first channel and at least one of said pair of oil storage chambers; and a pair of second sealing members arranged at axial inner sides of said second bushings to seal the lubricating oil that is filled through said oil storage chambers in between said second bushings and said connection pin.