To provide a half-split thrust bearing having a structure of not reducing load capacity of a thrust load, while minimizing local seizure and early fatigue.
As a result of forming an inclined faces 22 on the thrust back face 19c, 20d side of an end in the peripheral direction of half-split thrust bearings 19 and 20, a deformation clearance 25 exists between the inclined face 22 and a receiving seat 16. Then, when the thrust load of a crankshaft 11 is applied to the half-split bearings 19 and 20, throttling oil film pressure is generated in fluid in a clearance between bearing surfaces 19b and 20c of the half-split thrust bearings 19 and 20 and a thrust collar 11a, and since the end in the peripheral direction of the half-split thrust bearings 19 and 20 can be elastically deformed in the action direction of the thrust load in the deformation clearance 25, even when a step is generated between a cylinder block 12 and a bearing cap 13, local contact with the thrust collar 11a is prevented, and the local seizure and the early fatigue can be minimized.
YONEYA SHINYA
SONOBE HIROMI
NOMURA YUKARI
