Patent ID: 8840307
Filing Date: 2014-09-23
Classification: F16C

Abstract:
1. A connecting rod bearing for supporting a crankpin of an internal combustion engine, the crankpin having a discharge port on its surface for supplying lubricating oil to a gap between the crankpin and the connecting rod bearing, the connecting rod bearing comprising a pair of half bearings, wherein each half bearing comprises a main cylindrical portion including a central portion of the half bearing in a circumferential direction, crush reliefs formed at both end portions of the half bearing in the circumferential direction so that the thickness of walls of the end portions is smaller than that of a wall of the main cylindrical portion, and a transitional region formed between at least one of the crush reliefs on a rear side in a rotational direction of the crankpin and the main cylindrical portion so that the thickness of a wall of the transition region decreases toward the crush relief, the crush reliefs are each formed so that when setting a virtual inner circumferential surface by extending an inner circumferential surface of the main cylindrical portion over the crush relief, the depth from the virtual inner circumferential surface at a position of an end surface of the half bearing in the circumferential direction is larger than that at a position where the crush relief connects with the transitional region, and a plurality of circumferential grooves are provided in the main cylindrical portion to continuously extend in the circumferential direction throughout an entire length in the circumferential direction, and are continuously formed also in the transitional region.