Title:
CRANK SHAFT FOR RECIPROCATING ENGINE AND DESIGN METHOD FOR SAID CRANK SHAFT
Document Type and Number:
WIPO Patent Application WO/2016/009641
Kind Code:
A1
Abstract:
The shape of an arm section (A) of a crank shaft is asymmetrical, relative to a boundary line being an arm section center line (Ac) that connects the axis center of a pin section (P) and the axis center of a journal section (J). The flexural rigidity of the arm section (A) is greatest at the time that the load caused by combustion pressure is greatest. When the arm section (A) is divided into left and right arm section elements (Ar, Af) having the arm section center line (Ac) as the boundary therefor, the moment of inertia of area of an arm section element on the side that the maximum load is applied is greater than the moment of inertia of area for the arm section element on the opposite side to the side on which the maximum load is applied, in each cross-section further on the outside than the axis center of the pin section (P), among cross-sections that are vertical to the arm section center line (Ac) of the arm section (A), and the moment of inertia of area of the arm section element on the opposite side to the side to which the maximum load is applied is greater than the moment of inertia of area of the arm section element on the side to which the maximum load is applied, in each cross-section further on the inside than the axis center of the pin section (P). This crank shaft has improved flexural rigidity and is lighter.
Inventors:
ISHIHARA KOICHIRO (JP)
YOSHINO KEN (JP)
YOSHINO KEN (JP)
Application Number:
PCT/JP2015/003541
Publication Date:
January 21, 2016
Filing Date:
July 14, 2015
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
F16C3/08
Foreign References:
| JPS5649312U | 1981-05-01 | |||
| JPH08226432A | 1996-09-03 | |||
| JPH11125235A | 1999-05-11 | |||
| JP2000320531A | 2000-11-24 | |||
| JP2015021604A | 2015-02-02 |
Other References:
See also references of EP 3171044A4
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (JP)
アセンド patent business corporation (JP)
アセンド patent business corporation (JP)
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