PISTON STRUCTURE FOR ENGINE

摘要

A piston pin structure for an engine is provided, which suppresses integral resonance of a piston, a piston pin, and a smaller end part of a connecting rod with respect to a larger end part of the connecting rod on the combustion stroke, as well as suppresses an increase of noise on other strokes, and restricts the fixed dynamic absorber inside the piston pin from coming off and ensures a coming-off function.;The piston pin structure may include a dynamic absorber including a fixed part fixed to a piston pin, a movable part extending in the axial direction of the piston pin, and a supporting part for swingably supporting the movable part with respect to the fixed part. A restriction mechanism for mechanically restricting the movement of the dynamic absorber in the axial direction may also be included.

主权项

1. A piston structure for an engine comprising:
a piston reciprocating within a cylinder; a connecting rod having a smaller end part coupled to the piston and a larger end part coupled to a crankshaft; a cross-sectionally hollow piston pin coupling the piston to the smaller end part of the connecting rod; and a dynamic absorber provided inside the piston pin; wherein the dynamic absorber includes a fixed part fixed to the piston pin, a movable part extending in an axial direction formed along an axis of the piston pin, and a supporting part for swingably supporting the movable part with respect to the fixed part, as well as a restriction mechanism mechanically restricting the movement of the dynamic absorber in the axial direction.