Bearing apparatus
AssigneeTaiho Kogyo Co., Ltd.
InventorsShinichiro Sakamoto, Atsushi Koyama
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Abstract
In a bearing apparatus provided herein a hard steel shaft is an opposite shaft of an Al—Sn—Si based alloy plain bearing. Its wear resistance is enhanced. The bearing apparatus comprises a steel shaft having hardness of Hv 500 or more at least on a surface thereof, and a plain bearing. The plain bearing is formed of an aluminum alloy containing 2 to 10 mass % of Si, 8 to 18 mass % Sn, and the balance being Al and unavoidable impurities, wherein the volume of Sn phase is 50% or more of the volume of the Si particles(the average particle diameter of Si of the aluminum alloy is 4 to 10 μm). The aluminum alloy has a hardness of Hv 45 or more.
Claims8
A bearing apparatus characterized by comprising a combination of a steel shaft having hardness of HV 500 or more at least on a surface thereof, a plain bearing, wherein the plain bearing is formed of an aluminum alloy containing 2 to 10 mass % of Si, 8 to 19 mass % of Sn and the balance being Al and unavoidable impurities, having a hardness of Hv 45 or more, wherein the average particle diameter of Si of the aluminum alloy is 4 to 10 μm, and the volume of Sn phase, which is calculated by a weight % of Sn and density of pure tin, is 50% or more of the volume of the Si particles, which is calculated by a weight % of Si and density of pure silicon.
Dependencies are inferred from the claim text.