| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing device for a crankshaft of an internal combustion engine having an excellent foreign matter discharge function while reducing the leakage amount of oil.SOLUTION: A bearing device includes a main bearing 19 and a connecting rod bearing 23. The main bearing 19 is constituted of a pair of semicylindrical bearings 17, 18. An oil groove 17a extended in a circumferential direction is provided on an inner peripheral face 17S of one semicylindrical bearing 17. The oil groove 17a is isolated from an axial line groove 24A formed in a joining part of the semicylindrical bearings 17, 18 with a separation inner circumferential surface 17S'. The circumferential length L1 of the separation inner circumferential surface 17S' is smaller than circumferential length L2 of an inlet opening 26 of a journal part 10. In addition, the connecting rod bearing 23 is constituted of a pair of semicylindrical bearings 21, 22. In the joint part, axial line grooves 54A, 54B and crash reliefs 62, 64 are formed. A foreign matter is properly discharged on the connecting rod bearing 23 by forming the crash relief in a given size. |
