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Patent Searching and Data


Title:
CRANK SHAFT FOR RECIPROCATING ENGINE
Document Type and Number:
WIPO Patent Application WO/2016/009640
Kind Code:
A1
Abstract:
A crank shaft comprising a journal section (J) forming a center axis of rotation, a pin section (P) eccentric relative to this journal section (J), and a crank arm section (A) that connects the journal section (J) and the pin section (P). A load caused by combustion pressure is applied to the pin section (P) via a connecting rod, in a direction from the axis center of a piston pin towards the axis center of the pin section (P). The arm section (A) comprises recessed sections (10) on a surface on the journal section (J) side, on the inside of ridge sections (11) following the contour of this surface, said recessed sections (10) following these ridge sections (11). The recessed sections (10) are asymmetrical relative to an arm section center line (Ac) that connects the axis center of the pin section (P) and the axis center of the journal section (J). The flexural rigidity of the arm section (A) is greatest at the time that a load caused by combustion pressure is greatest on the pin section (P). This crank shaft is lighter and has improved torsional rigidity and flexural rigidity.

Inventors:
ISHIHARA KOICHIRO (JP)
YOSHINO KEN (JP)
YABUNO KUNIHIRO (JP)
Application Number:
PCT/JP2015/003540
Publication Date:
January 21, 2016
Filing Date:
July 14, 2015
Export Citation:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
F16C3/08; F02B77/00
Foreign References:
JPS5649312U1981-05-01
JPH08226432A1996-09-03
JPH11125235A1999-05-11
JP2000320531A2000-11-24
JP2015021604A2015-02-02
Other References:
See also references of EP 3171045A4
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (JP)
アセンド patent business corporation (JP)
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