Link component with oil hole
AssigneeNissan Motor Co., Ltd.
InventorsTsuyoshi Sugimoto, Takahiro Hamada
Life of this patent
Estimating the term…
Abstract
A link component (150) with an oil hole (150E) is attached to a crankshaft (106) of an internal combustion engine (E), and the oil hole (150E) allows communication from an outside to the crankshaft (106) side. The oil hole (150E) has an inclined surface (150F) along an opening rim on the crankshaft (106) side. A surface other than the oil hole (150E) has a carbon concentration of 0.5 wt % or more. The inclined surface (150F) has a carbon concentration within a range of 0.7 wt % or more and 0.9 wt % or less. Production cost is suppressed, and at the same time, damage is prevented by increasing resistance of the oil-hole part on which stress is liable to concentrate.
Claims11
A linkage system, comprising:
- a linkage being an intermediate link split into a pair of link members, the link members each having an oil hole, the linkage being attached to a crankshaft of an internal combustion engine and the oil holes allowing communication from an outside to the crankshaft side, wherein the oil holes have an inclined surface along an opening rim on the crankshaft side, a surface other than the oil holes have a carbon concentration of 0.5 wt % or more, and the inclined surfaces have a carbon concentration within a range of 0.7 wt % or more and 0.9 wt % or less.
A linkage system, comprising:
- a linkage being part of an intermediate link split into a pair of link members, the link members each having an oil hole, the linkage being attached to a crankshaft of a variable compression ratio engine and the oil holes allowing communication from an outside to the crankshaft side, wherein the oil holes have an inclined surface along an opening rim on the crankshaft side, a surface other than the oil holes have a carbon concentration of 0.5 wt % or more, and the inclined surfaces have a carbon concentration within a range of 0.7 wt % or more and 0.9 wt % or less, wherein the linkage is vacuum carburized.
Dependencies are inferred from the claim text.