Title:
オイルポンプロータ
Document Type and Number:
Japanese Patent JP5692034
Kind Code:
B2
Abstract:
Provided is an oil pump rotor capable of improving a volume efficiency and a quietness. When a diameter of a base circle bi of an inner rotor is ¦ bi; a diameter of a first outer rolling circle Di is ¦ Di; a diameter of a first inner rolling circle di is ¦ di; a diameter of a base circle bo of an outer rotor is ¦ bo; a diameter of a second outer rolling circle Do is ¦ Do; a diameter of a second inner rolling circle do is ¦ do; and an eccentricity amount between the inner rotor and the outer rotor is e, ¦ bi = n·( ¦ Di + ¦ di) and ¦ bo = (n + 1)·( ¦ Do + ¦ do) hold; either ¦ Di + ¦ di = 2e or ( ¦ Do + ¦ do = 2e holds; and ¦ Do > ¦ Di and ¦ di > ¦ do hold. When a clearance between the inner rotor and the outer rotor is t, 0.3 ¤ (( ¦ Do + ¦ do) - ( ¦ Di + ¦ di))·(n + 1)/t ¤ 0.6 holds, provided that ¦ Di + ¦ di = 2e; or 0.3 ¤ (( ¦ Do + ¦ do) - ( ¦ Di + ( ¦ di))·n/t ¤ 0.6 holds, provided that ¦ Do + ¦ do = 2e.
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Inventors:
Atsushi Shiotani
New wife Eiichiro
New wife Eiichiro
Application Number:
JP2011273866A
Publication Date:
April 01, 2015
Filing Date:
December 14, 2011
Export Citation:
Assignee:
Diamet Co., Ltd.
International Classes:
F04C2/10
Domestic Patent References:
| JP4393943B2 | ||||
| JP4650180B2 | ||||
| JP11264381A |
Attorney, Agent or Firm:
Mamoru Ushiki