Structure of crankshaft for internal combustion engine
AssigneeHonda Motor Co., Ltd.
InventorsMitsuyoshi KAMIYA, Motoki HARADA, Hodaka MUKOUHARA
Life of this patent
Estimating the term…
Abstract
A crankshaft for an internal combustion engine can be an integrated crankshaft in which a thrust receiving surface is formed on each of crank arm parts around the root of a crankpin in an annularly protruding manner to restrict axial movement of a connecting rod. A recessed portion is formed in each of the facing surfaces of facing crank webs at a position near a corner portion continuing from the crankpin to the crank arm part, the position being so close to the crankpin that part of the thrust receiving surface is cut away.
Claims18
A crankshaft for an internal combustion engine, said crankshaft comprising:
- crank webs, each comprising a crank arm part and a counterweight part formed continuously from the crank arm part, said crank webs forming crank journals around a rotation axis of the crankshaft in a protruding manner;
- at least one crankpin joining crank arm parts of crank webs that are facing each other,
- wherein a thrust receiving surface is formed on each of the crank arm parts around a root of the at least one crankpin in an annularly protruding manner to restrict axial movement of a connecting rod, and
- wherein a recessed portion is disposed in each of facing surfaces of the facing crank webs at a position near a corner portion continuing from the crankpin to the crank arm part, the position being so close to the crankpin that part of the thrust receiving surface is cut away.
A crankshaft for an internal combustion engine, said crankshaft comprising:
- crank web means for offsettingly supporting crankpin means therebetween, said crank web means each including crank arm means and counterweight means, said counterweight means being formed continuously with the crank arm means, said crank web means forming crank journal means around a rotation access of the crankshaft in a protruding manner;
- crankpin means disposed between crank arm means of crank web means which are facing each other, said crankpin means for supporting a connecting rod thereupon,
- wherein a thrust receiving surface is formed on each of the crank arm means around a root of the crankpin means in an annularly protruding manner, to restrict axial movement of the connecting rod, and
- wherein a recessed portion is disposed in each of the facing surfaces of the facing crank web means at a position near a corner portion continuing from the crankpin means to crank arm means, the position being so close to the crankpin means that part of the thrust receiving surface is cut away.
Dependencies are inferred from the claim text.