| 摘要 |
<P>PROBLEM TO BE SOLVED: To promote a rise of a temperature of lubrication oil at a low temperature, and to promote the lubrication of the lubrication oil at a high temperature when supporting a rotating shaft by a radial plain bearing using the lubrication oil. <P>SOLUTION: In a back plate 32, a coefficient of thermal expansion of a back plate layer 35 at an internal peripheral side which is high in a coefficient of thermal expansion is higher than a coefficient of thermal expansion of a back plate layer 34 at an external peripheral side which is low in a coefficient of thermal expansion. An oil relief 36 is narrowed at a low temperature, thereby the discharge of the lubrication oil filled between a crank pin 18 and a bearing alloy layer 33 is suppressed. Alternatively, the oil relief 36 is widened by the thermal expansion of the pack plate 32 at which an amount of the thermal expansion of the back metal layer 35 at the internal peripheral side which is high in a coefficient of thermal expansion becomes larger than an amount of the thermal expansion of the back plate layer 34 at the external peripheral side which is low in a coefficient of thermal expansion, and thus the discharge of the lubrication oil filled between the crank pin 18 and the bearing alloy layer 33 is promoted. <P>COPYRIGHT: (C)2012,JPO&INPIT |
