THRUST BEARING DEVICE OF CRANK SHAFT

摘要

PROBLEM TO BE SOLVED: To prevent a lower half thrust bearing metal from dropping out from the lower half thrust bearing seat by loking a pawl to a hole for a whirl-stop when the lower half thrust bearing metal begins to fall due to a shock or the like during assembling in the reversal posture. SOLUTION: A hole 12 for whirl stop penetrating from the outer periphery of the lower half thrust bearing seat 8 into the thick wall of the lower half bearing case 5 is formed and a whirl-stop engaging part 10 is formed by the whirl-stop hole 12. A whirl-stop protrusion 11 of the lower half thrust bearing metal 9 is bent to the whirl-stop hole 12 and continuously projected to form a pawl 13. The pawl 13 is fitted in the whirl-stop hole 12. The whirl-stop hole 12 is forced to let the lower half bearing case 5 penetrate to form the whirl-stop through-hole 14. The total two whirl-stop holes 12, 12 formed on the both front and rear end faces of the lower half bearing case 5 are formed at both ends of one whirl-stop through-hole 14.