Method of producing a crank arm for a crankshaft
AssigneeAndreas Stihl AG & Co. KG
InventorsHarald Schliemann, Arno Roos
Life of this patent
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Abstract
A method is provided for producing a crank arm for a crankshaft of an internal combustion engine, wherein the crankshaft is composed of separately produced parts. The crank arm is stamped out of a semifinished part and has a central recess for receiving a shaft journal of the crankshaft, and has an eccentrically disposed recess for receiving a crankshaft pin. A peripheral contour of the stamped part delimits a flywheel member of the crank arm. A recessed surface portion is formed or stamped in the crank arm in an area surrounding the central recess.
Claims11
A method of producing a crank arm for a crankshaft of an internal combustion engine, wherein the crankshaft is composed of separately produced parts, said method including the steps of:
- stamping said crank arm from a semifinished part such that said crank arm has a central recess for receiving a shaft journal of said crankshaft, and an eccentrically disposed recess for receiving a crankshaft pin, and such that said crank arm has a peripheral contour that, on a side of said central recess opposite said eccentrically disposed recess, delimits a flywheel member;
- and
- forming in said crank arm, in an area surrounding said central recess, a recessed surface portion.
Dependencies are inferred from the claim text.