초록 ▼

An oilless antifriction bearing capable of supporting a large load, not requiring maintenance work for lubrication and having high durability comprises an outer ring (1) having an outer-ring race, an inner ring (2) having an inner-ring race, a plurality of metallic rolling elements (3), and a plural

An oilless antifriction bearing capable of supporting a large load, not requiring maintenance work for lubrication and having high durability comprises an outer ring (1) having an outer-ring race, an inner ring (2) having an inner-ring race, a plurality of metallic rolling elements (3), and a plurality of polyethylene rolling elements (4). The plurality of metallic rolling elements (3) and the plurality of polyethylene rolling elements (4) are arranged circumferentially alternately in the space between the outer-ring race of the outer ring (1) and the inner ring race of the inner ring (2). The polyethylene rolling elements (4) are interposed between the metallic rolling elements (3) to prevent the direct contact between the metallic rolling elements (3), making lubrication unnecessary. The polyethylene rolling elements allow free foreign matter including abrasive particles produced by the abrasion of the unlubricated steel cylindrical rollers and external dust particles to become embedded in the polyethylene to entrap the free foreign matter.

대표청구항 ▼

[ We claim:] [1.] A chain comprising a series of interconnected links, each link having a pair of parallel link plates, a bush extending between said link plates at each end of the parallel link plates, a hollow cylindrical chain roller mounted on each bush, and an oilless antifriction bearing posit

[ We claim:] [1.] A chain comprising a series of interconnected links, each link having a pair of parallel link plates, a bush extending between said link plates at each end of the parallel link plates, a hollow cylindrical chain roller mounted on each bush, and an oilless antifriction bearing positioned between said bush and said roller, said bush providing an inner ring race and said hollow roller providing an outer ring race of said bearing, and rolling elements in the annular space between said inner and outer ring races, said space operable to have free particles therein, the improvement whereinsaid rolling elements comprise metallic elements and polyethylene elements mounted in circumferential alternation within said annular space,said metallic rolling elements constituting load-bearing components between said inner and outer ring races, and being rotated by frictional engagement therebetween,said polyethylene elements comprising a polyethylene composition which allows particles to become embedded in said polyethylene composition which entraps any of said free particles and prevents their entry between said metallic rolling elements and said inner and outer ring races.