Connecting rod manufacturing method and connecting rod
AssigneeToyota Jidosha Kabushiki Kaisha
InventorTakaaki Kawazoe
Life of this patent
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Abstract
A connecting rod manufacturing method includes: forming, in an inner circumferential surface of a through-hole formed at an end of the connecting rod, a plurality of first holes as fracture start portions such that the first holes are arrayed in an axial direction of the through-hole and extend in a first direction; forming a plurality of second holes as the fracture start portions, each between adjacent ones of the first holes, such that the second holes are arrayed in the axial direction and extend in a second direction different from the first direction relative to the first holes; and fracture-splitting the end of the connecting rod into a rod part and a cap part using the fracture start portions as start points.
Claims13
A connecting rod manufacturing method comprising:
- forming, in an inner circumferential surface of a through-hole formed at an end of the connecting rod, a plurality of first holes as fracture start portions such that the first holes are arrayed in an axial direction of the through-hole and extend in a first direction;
- forming a plurality of second holes as the fracture start portions, each between adjacent ones of the first holes, such that the second holes are arrayed in the axial direction and extend in a second direction different from the first direction relative to the first holes;
- and
- fracture-splitting the end of the connecting rod into a rod part and a cap part using the fracture start portions as start points.
A connecting rod comprising:
- a rod part having a fracture surface;
- and
- a cap part that has a fracture surface, and defines a through-hole together with the rod part in a state where the fracture surfaces are positioned relative to each other, wherein
- in the state where the fracture surfaces are positioned relative to each other, a plurality of first holes that is arrayed in an axial direction of the through-hole and extends in a first direction from an inner circumferential surface of the through-hole, and a plurality of second holes that is arrayed in the axial direction and extends from the inner circumferential surface in a second direction different from the first direction relative to the first holes, are present between the fracture surfaces.
Dependencies are inferred from the claim text.