Sliding bearing

Abstract

An overlay layer 3 comprising MoS2 as a solid lubricant and PAI resin as a binder resin is formed on a flattened surface of a bearing alloy layer 2, and a helical groove 4 and annular projections 5 are formed as an uneven configuration in and on the surface of the overlay layer. In accordance with the invention, a regular uneven configuration is formed on the surface of the overlay layer to allow a lubricant oil to be secured in recesses of the uneven configuration, allowing a seizure resistance to be improved. The bearing alloy layer is machined to have a flat surface having a fine roughness on its surface which represents a boundary with an overlay layer, whereby individual convex areas of the overlay layer are evenly subject to a plastic deformation, allowing the fitting property response of the sliding bearing to be improved.

Description

technical field [0001] The present invention relates to a sliding bearing, in particular to a sliding bearing having a bearing alloy layer and a coating composed of solid lubricant and resin provided on the surface of the bearing alloy layer. Background technique [0002] As described in Japanese Patent No. 3133209 (hereinafter referred to as Patent Document 1) and Japanese Unexamined Publication No. 2002-61652 (hereinafter referred to as Patent Document 2), in the original sliding bearing, the surface of the bearing alloy layer is equipped with solid lubricant Sliding bearings coated with agents and resins are known. [0003] In these Patent Documents 1 and 2, the adaptability and seizing resistance of the sliding bearing and the rotating shaft due to the plastic deformation of the coating are improved by providing the coating. [0004] However, in the sliding bearings of the above-mentioned Patent Documents 1 and 2, after the above-mentioned coating is sprayed by pneumati...

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Problems solved by technology

[0004] However, in the sliding bearings of the above-mentioned Patent Documents 1 and 2, after the above-mentioned coating is sprayed by air pressure spraying, the surface of the coating is actually irregular because it is formed by heating and hardening.

[0005] Therefore, when the rotating shaft rotates at high speed, there may be irregular coating on the surface of the coating, the lubricating oil can not be evenly coated on the coating, the resistance to sintering becomes poor, and then the surface of the coating and the rotating shaft The plastic deformation of the coating caused by the contact becomes uneven and the problem of insufficient adaptability

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