| 摘要 |
PROBLEM TO BE SOLVED: To provide connecting rod structure for a two-cycle engine to reduce a stress value on the end point of an oil groove even when a slit-form oil groove is formed in the large end part of the connecting rod, improve the fatigue resisting strength of the large end part, and be hardly broken. SOLUTION: An arcuate slit-form oil groove 38 having a given position being a center on a reference line Ls crossing an axis L1, interconnecting the center 34c of a small end part 34 and the center 30c of the large part, at right angles at the center 30c of a large end part is formed in the large end part 30 coupled to a crank pin. The end point P position on one side of the oil groove 38 is situated such that an angleβof the reference line LS with a direction extending from the center 30c of the large end part to the small end part 34 is 35 deg. or more.
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