Back to results
US 2014/0318310 A1Published application
Crankshaft and method for producing the same
AssigneeHonda Motor Co., Ltd.
InventorsTakayuki Ohnuma, Tsutomu Ando, Yasuhiro Ito
Life of this patent
Estimating the term…
Abstract
In a crankshaft 200, one hole 213L formed in a crankpin 213 has a bottom surface having a larger area and a depth from a surface of the crankpin less than those of another hole 213M. In forming the hole 213L and the hole 213M, a preformed product 200 of the crankshaft having a shape smaller than that of a cavity is disposed in a die set and punches are simultaneously inserted into the crankpin 213. By this operation, the hole 213L and the hole 213M are simultaneously formed in each crankpin 213 of the preformed product 200.
Claims5
1-7. (canceled)
A crankshaft comprising:
- a crankpin;
- a journal shaft:
- a hole having a hollow structure formed on a surface of the crankpin;
- and
- an oil flow passage formed in an inside of the crankpin;
- wherein the hole has plural surfaces and one surface most proximate to the oil flow passage is extended in a direction substantially parallel to the oil flow passage, and
- a shape of the hole contains a straight line that divides a line segment of a base of the hole in half and is parallel to a side surface of the hole on a cross section containing an axis of the journal shaft and passes through a journal shaft side surface of the crankpin.
4 more elements
Dependencies are inferred from the claim text.