Bearing member

Abstract

A bearing member 1 has, on the inner peripheral surface of a shaft hole 1A to which a shaft body 2 is to be fitted, a coating layer 3 including a base material 3A made of metal and a thermally conductive material 3B which is dispersed in the base material 3A and which has relatively higher thermal conductivity than the base material 3A, wherein the thermally conductive material 3B has lengths Lb,Lc in the directions B, C along a surface of the coating layer 3, the lengths Lb, Lc being greater than the length La in the thickness direction A of the coating layer 3. By increasing thermal conductivity in the directions B, C along the inner peripheral surface of the shaft hole 1A, heat dissipation property improves, and a rise in temperature caused by sliding contact with the shaft body 2 is suppressed, thereby achieving improvement of seizure resistance.

Description

technical field [0001] The present invention relates to a bearing component used as a sliding bearing, for example, in a rotary sliding part of an automobile engine. Background technique [0002] As a conventional bearing component, the bearing component described in patent document 1 is mentioned, for example. The bearing component described in Patent Document 1 is used in internal combustion engines of automobiles and the like. The bearing part is a multilayer sliding bearing in which an alloy covering bearing layer with a thickness of 3 to 50 μm is provided on the surface of a copper alloy layer with a predetermined thermal expansion coefficient, thermal conductivity and endurance. The deformation followability of the bearing shell is high, and the heat dissipation is excellent. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Application Laid-Open No. 6-94037 [0006] However, when the above-mentioned conventional b...

AI Technical Summary

Problems solved by technology

[0006] However, when the above-mentioned conventional bearing member is applied to the main metal of the automobile engine or the metal of the connecting rod, since it receives the load from the axial direction of the connecting rod and is in rotational sliding contact with the shaft body, there is a gap between the shaft body and the shaft body. There is a possibility of sintering due to frictional heat in a local high-temperature area where frictional heat is generated

Such a bearing component, especially as one of the measures to reduce the weight of the engine, has the problem that if the shaft length is reduced, the friction force will increase as the surface pressure increases, and sintering will easily occur.

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