| 摘要 |
PURPOSE:To prevent fretting abrasion and increase the life of bearing by cover ing either of a housing or the back metal of said bearing with a layer of metal having a hardness of HV 15-18. CONSTITUTION:A plain bearing 10 which supports a shaft member 2, consists of an aluminum group alloy layer 12 which constitutes the plain bearing part for the shaft member 2, and a back-metal steel plate 13 which carries the layer 12. Although not indispensable, an Ni plating or an Al plating layer 14 may be provided to facilitate the adhesion of the both layers 12, 13. And, by providing a metal layer 15 on the plain bearing 10, on the side opposite to the housing 1, contact between the back-metal steel plate 13 and the housing 1 can be prevented and, even if a minute foreign matter 17 may come to intervene, from some reason or other, in a minute gap 20, the foreign matter is prevented from getting larger than its existing state, or being piled up. |
