PURPOSE: To obtain a connecting rod which is light, high in strength and rigidity, and economical by forming a rod part and large and small ends with a high strength/rigidity material and a light alloy having similar strength and rigidity to those of the rod part, respectively, and forming them into one body through mechanic connection parts.
CONSTITUTION: A rod part 1 is formed of a material whose elastic modulus is 12,000kgf/mm2 or more and tensile strength is 60kgf/mm2 or more, while large and small ends 2, 3 are formed of high strength light alloy whose elastic modulus is 8,000W11,000kgf/mm2, tensile strength is 40kgf/mm2 or more and specific gravity is 2.6W3.0. The rod part 1, the big and small ends 2, 3 are formed in one body through mechanical connection parts 4 without using wax. As a result, reduction in weight of the rod in the caption is obtained, while the rigidity and strength can be improved by suppressing elastic deformation during operation.
HAYASHI TETSUYA
AMANO NOBUYA
