Title:
INNER ROTOR FOR INTERNAL GEAR PUMP
Document Type and Number:
WIPO Patent Application WO/2006/075364
Kind Code:
A1
Abstract:
[PROBLEMS] Local stress concentration caused by rotational moment transmitted from a crankshaft is eased. [MEANS FOR SOLVING PROBLEMS] A crankshaft (6) and an installation hole (5) have a substantially hexagonal cross-sectional shape having six corners (13, 23), and the cross-sectional shape of the installation hole (5) is formed by connecting adjacent corners (23, 23) by connection sections (22) that each project inward in a large circular arc shape. By this construction, the tips of the corner (13) of the crankshaft (6) do not come into contact with the inner surface of the installation hole (5), and rotational force of the crankshaft (6) is transmitted to the installation hole (5) with connection sections (12) of the crankshaft (6) and the large circular arc-shaped connection sections (22) of the installation hole (5) in line contact with each other. As a result, a local stress value occurring at the installation hole (5) can be reduced.
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Inventors:
HOSONO KATSUAKI (JP)
Application Number:
PCT/JP2005/000234
Publication Date:
July 20, 2006
Filing Date:
January 12, 2005
Export Citation:
Assignee:
MITSUBISHI MATERIALS PMG CORP (JP)
HOSONO KATSUAKI (JP)
HOSONO KATSUAKI (JP)
International Classes:
F04C2/10; F04C15/00; (IPC1-7): F04C2/10; F04C15/00
Foreign References:
| JPH08200223A | 1996-08-06 | |||
| JPS60180783U | 1985-11-30 | |||
| JPS59107987U | 1984-07-20 | |||
| JPS61223282A | 1986-10-03 |
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