| 摘要 |
PROBLEM TO BE SOLVED: To provide a piston structure for an engine in which a piston, a piston pin and a small end of a connecting rod are restrained from integrally resonating with a large end of the connecting rod in a combustion stroke, noise is restrained from increasing in other strokes, acting of a large load on a supporting part or deterioration of installation performance is suppressed when a cap part is press-fitted to a shaft part to be integrated, and required spring rigidity can be secured so that desired vibration reduction performance can be secured.SOLUTION: A dynamic vibration reducer 20 includes a fixing part 20a fixed to a piston pin, a supporting part 20c having a diameter smaller than the fixing part 20a, a shaft part 20d extended from the supporting part 20c in a piston pin axial direction, and a cap part 40 fixed on an outer periphery of the shaft part 20d, and a movable part 20b is formed by the shaft part 20d and the cap part 40, the supporting part 20c swingably supports the movable part 20b to the fixing part 20a, and the cap part 40 is press-fitted to the shaft part 20d in a part of a press-fit direction end side. |
