Patent ID: 8690437
Filing Date: 2014-04-08
Classification: F16C

Abstract:
1. A connecting rod bearing for a crankshaft of an internal combustion engine which rotatably supports a crankpin of a crankshaft having an internal lubricant-oil passage, wherein the connecting rod bearing comprises a pair of semi-cylindrical bearings, the pair of semi-cylindrical bearings each having a front side circumferential end surface positioned at a front side with respect to a rotational direction of the crankpin, and a rear side circumferential end surface positioned at a rear side, the front side circumferential end surface of one of the semi-cylindrical bearings and the rear side circumferential end surface of the other one of the semi-cylindrical bearings abutting on each other, in at least one of the semi-cylindrical bearings, a front side circumferential groove being formed along a bearing inner circumferential surface from the front side circumferential end surface within a range of a maximum central angle of 45 degrees, in the opposed semi-cylindrical bearing, a rear side circumferential groove which communicates with the front side circumferential groove being formed along a bearing inner circumferential surface from the rear side circumferential end surface within a range of a maximum central angle of 45 degrees, an axial groove which communicates with the front side circumferential groove and the rear side circumferential groove being formed throughout an entire length of a width in an axial direction along the bearing inner circumferential surface, in at least one of the semi-cylindrical bearings, a front side crush relief being formed along the bearing inner circumferential surface from the front side circumferential end surface on which the front side circumferential groove is formed, in the opposed semi-cylindrical bearing, a rear side crush relief being formed along the bearing inner circumferential surface from the rear side circumferential end surface on which the rear side circumferential groove is formed, a circumferential length of the front side circumferential groove being larger than a circumferential length of the front side crush relief, and a circumferential length of the rear side circumferential groove being smaller than a circumferential length of the rear side crush relief.