Patent ID: 8961018
Filing Date: 2015-02-24
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 lubrication oil to a gap between the crankpin and the connecting rod bearing, the connecting rod bearing comprising a pair of half bearings, wherein the 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 the crush relief on a front 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, a plurality of crush relief grooves are formed in the crush relief to continuously extend in the circumferential direction, and an axial groove is formed at an inner side end edge of the half bearing in the circumferential direction to continuously extending in an axial direction so that the crush relief grooves communicate with the axial groove, and a depth of the crush relief at a position connecting to the transitional region is between 0.005 to 0.030 μm.