Rocker arm structure
AssigneeHonda Motor Co., Ltd.
InventorsKatsuhiro Kubo, Yuki Uzawa, Masahiro Nakashima
Life of this patent
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Abstract
The disclosed structure achieves a desired balance between higher-rigidity and weight saving in a connection-type rocker arm which integrally rocks a plural of arm portions. The rocker arm has a plurality of arm portions integrally formed on a swinging base end side of the rocker arm which are forked and extend towards a swinging end of the rocker arm, a connecting portion which integrally connects each swinging end of the arm portions, and a concave thinning portion which overlaps a swinging trajectory of the connecting portion, when viewed in the axis direction of the pivot shaft of the rocker arm.
Claims20
A rocker arm structure disposed between a cam of a camshaft and a valve, and which urges said valve by being urged and swung by said cam, said rocker arm structure comprising:
- a plurality of arm portions extending from a cylindrical base portion, said plurality of arm portions being forked in an axis direction of the cylindrical base portion and which extend away from an axis of said cylindrical base portion;
- and
- a connecting portion connecting said plurality of arm portions and being unitary with said arm portions, said connecting portion swinging on a swinging trajectory when said rocker arm is actuated by the camshaft,
- wherein said plurality of arm portions each include a concave thinning portion which overlaps a swinging trajectory of said connecting portion, when viewed in the axis direction of said cylindrical base portion.
Dependencies are inferred from the claim text.