Invention Grant
- Patent Title: Oil pump rotor
- Patent Title (中): 油泵转子
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Application No.: US14236455Application Date: 2012-12-13
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Publication No.: US09574559B2Publication Date: 2017-02-21
- Inventor: Atsushi Shiotani , Eiichiro Niizuma
- Applicant: DIAMET CORPORATION
- Applicant Address: JP Niigata-shi
- Assignee: DIAMET CORPORATION
- Current Assignee: DIAMET CORPORATION
- Current Assignee Address: JP Niigata-shi
- Agency: Leason Ellis LLP.
- Priority: JP2011-273866 20111214
- International Application: PCT/JP2012/082423 WO 20121213
- International Announcement: WO2013/089203 WO 20130620
- Main IPC: F04C2/10
- IPC: F04C2/10 ; F04C2/08

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 Φ bi; a diameter of a first outer rolling circle Di is Φ Di; a diameter of a first inner rolling circle di is Φ di; a diameter of a base circle bo of an outer rotor is Φ bo; a diameter of a second outer rolling circle Do is Φ Do; a diameter of a second inner rolling circle do is Φ do; and an eccentricity amount between the inner rotor and the outer rotor is e, Φ bi=n·(Φ Di+Φ di) and Φ bo=(n+1)·(Φ Do+Φ do) hold; either Φ Di+Φ di=2e or Φ Do+Φ do=2e holds; and Φ Do>Φ Di and Φ di>Φ do hold. When a clearance between the inner rotor and the outer rotor is t, 0.3≦((Φ Do+Φ do)−(Φ Di+Φ di))·(n+1)/t≦0.6 holds, provided that Φ Di+Φ di=2e; or 0.3≦((Φ Do+Φ do)−(Φ Di+Φ di))·n/t≦0.6 holds, provided that Φ Do+Φ do=2e.
Public/Granted literature
- US20140178233A1 OIL PUMP ROTOR Public/Granted day:2014-06-26
Information query
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