Connecting rod breaking method
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsMami Abe, Junji Yokota, Michitaka Okugawa
Life of this patent
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Abstract
A notch is formed in an inner circumference of a bolt hole formed on each side of a large end of the connecting rod such that the notch extends continuously along the inner circumference. By radially propagating progress of breakage from the notch as a starting point, a connecting rod is broken into a rod portion and a cap portion. In this case, since no confluence of breakage propagation exists, the connecting rod can be broken without generating any breaking surface step.
Claims5
A method for breaking an integrally molded connecting rod into a rod portion and a cap portion in a large end in which a large end hole is formed,
- the method comprising:
- forming a notch in an inner circumference of a bolt hole, which is formed on each side of the large end and into which a bolt for fastening the rod portion and the cap portion to each other is inserted, such that the notch extends continuously along the inner circumference;
- and
- performing the breaking by radially propagating progress of breakage from the notch as a starting point.
Dependencies are inferred from the claim text.