THRUST BEARING AND BEARING DEVICE FOR CRANKSHAFT OF INTERNAL COMBUSTION ENGINE

摘要

The invention provides a thrust bearing for receiving an axial force of a crankshaft of an internal combustion engine. The thrust bearing includes a pair of half thrust bearings having a semi-annular shape that form an annular shape by abutting their circumferential end surfaces. Each half thrust bearing include thrust reliefs formed adjacent to both circumferential end portions of a sliding surface receiving the axial force so that a wall thickness is thinner toward the circumferential end surface. A thrust relief length L2 at an inner end portion of the thrust relief positioned on a rear side of one of the half thrust bearings in a rotational direction is larger than a thrust relief length L1 at an inner end portion of the thrust relief positioned on a front side of the other of the half thrust bearing in the rotational direction.

主权项

1. A thrust bearing for receiving an axial force of a crankshaft of an internal combustion engine, comprising a pair of half thrust bearings each having a semi-annular shape, the pair of half thrust bearings forming an annular shape by butting respective circumferential end surfaces thereof, wherein
each half thrust bearing comprises thrust reliefs adjacent to both circumferential end portions of a sliding surface receiving the axial force, the thrust relief being formed so that a wall thickness of the half thrust bearing is made thinner toward the circumferential end surface, and a thrust relief length at an inner end portion of the thrust relief positioned on a rear side of one of the half thrust bearings in a crankshaft rotational direction is larger than a thrust relief length at an inner end portion of the thrust relief positioned on a front side of the other of the half thrust bearings in the crankshaft rotational direction.