CONNECTING ROD LUBRICATING STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a connecting rod lubricating structure capable of supplying a sufficient quantity of lubricating oil to the bearing part between a piston pin and a minor end part and preventing the bearing part from seizure certainly. SOLUTION: This lubricating structure includes a piston 11 equipped with a recess 20 at the piston top 17 whose rear surface is formed in a projection 24 in a shape approximately mating with the shape obtained by inverting the recess 20 upside down and a connecting rod 16 to bear the minor end part 33 on the piston 11, and oil holes 35 and 36 for lubricating the bearing part are provided in the minor end part 33 so that the piston 11 when positioned near the lower dead point BDC is directed to the peripheral edge of the projection 24 on the rear surface of the piston top 17.