Half thrust bearing and bearing device

摘要

A half thrust bearing having a semicircular ring shape for receiving an axial force of a crankshaft of an internal combustion engine is provided. The half thrust bearing includes thrust reliefs formed adjacently to end surfaces on both sides in a circumferential direction on a slide surface side which receives the axial force so that wall thicknesses become thinner toward the end surfaces. The thrust relief on a rear side in a rotational direction of the crankshaft or both thrust reliefs are formed so that a length of the thrust relief in an inner end portion in a radial direction of the half thrust bearing is longer than a length of the thrust relief in an outer end portion in the radial direction of the half thrust bearing.

主权项

1. A half thrust bearing having a semicircular ring shape for receiving an axial force of a crankshaft of an internal combustion engine, the half thrust bearing comprising:
a slide surface; an end surface; and a thrust relief formed adjacent to the end surface along a circumferential direction of the slide surface, wherein: a wall thickness of the thrust relief decreases toward the end surface, the thrust relief has an inner end portion and an outer end portion, the inner end portion extends circumferentially from the end surface to the slide surface along an inner circumferential perimeter, the outer end portion extends circumferentially from the end surface to the slide surface along an outer circumferential perimeter, and a length of the inner end portion is longer than a length of the outer end portion.