| 摘要 |
PURPOSE:To surely discharge foreign matters of various particle sizes to the outside of a bearing main body while the satisfactory strength of the bearing main body and the oil film forming ability are secured. CONSTITUTION:A bearing main body 4 for supporting a crankshaft 1 through oil in such a manner as to freely rotate comprises a load part B for bearing the load from the crankshaft 1 and non-load parts C, D to which the load is not applied. Plural foreign matter discharge grooves 5-8 extended in the axial direction are formed on the inner surface of the bearing main body 4, from which foreign matter 9 contained in the oil is discharged. The plural foreign matter discharge grooves 5-8 are formed on the non-load part C of the inner surface of the bearing main body 4. In a space between the crankshaft 1 and the bearing main body 4, the sectional areas of the foreign matter discharge grooves 5-8 are gradually decreased toward the load part B according to the clearance gradually decreased from the non-load part C toward the load part B in front in the rotating direction A of the crankshaft 1. |
