Title:
HYDRAULIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2005/026582
Kind Code:
A1
Abstract:
A hydraulic device comprising an input shaft (2) and an output shaft, first and second plungers (8, 10) reciprocating in the axial direction, first and second spool valves (9, 11) similarly reciprocating in the axial direction, a cylinder block (7) containing the plungers and the spool valves and rotating integrally with the input shaft, an input side swash plate (6) in contact with the first plunger, and an output side swash plate (12) rotating integrally with the output shaft while being in contact with the second plunger, wherein a hydraulic circuit interconnecting holes for containing the first and second plungers is formed in the cylinder block and flow paths of the hydraulic circuit are switched by the first and second spool valves. The number of components for maintaining the precision in reciprocation of the first and second spool valves is reduced. Spool valve guides (37, 47) having guide grooves (37b, 47b) inclining against the axis are provided and the first or second spool valve engages with an engaging member (38, 48) fixed to the guide groove or with the guide groove.
Inventors:
OUCHIDA TAKESHI (JP)
SHIOZAKI SHUJI (JP)
NIU HIDEKAZU (JP)
MATSUYAMA HIROSHI (JP)
SHIOZAKI SHUJI (JP)
NIU HIDEKAZU (JP)
MATSUYAMA HIROSHI (JP)
Application Number:
PCT/JP2004/006654
Publication Date:
March 24, 2005
Filing Date:
May 18, 2004
Export Citation:
Assignee:
YANMAR CO LTD (JP)
OUCHIDA TAKESHI (JP)
SHIOZAKI SHUJI (JP)
NIU HIDEKAZU (JP)
MATSUYAMA HIROSHI (JP)
OUCHIDA TAKESHI (JP)
SHIOZAKI SHUJI (JP)
NIU HIDEKAZU (JP)
MATSUYAMA HIROSHI (JP)
International Classes:
F04B53/10; F16H39/14; F04B1/22; (IPC1-7): F16H39/14
Foreign References:
| JP2003014079A | 2003-01-15 | |||
| US1780365A | 1930-11-04 | |||
| DE19527649A1 | 1997-01-30 | |||
| JP2002031209A | 2002-01-31 | |||
| JPH1182671A | 1999-03-26 | |||
| JP2003014079A | 2003-01-15 |
Other References:
ASHIBA S. ET AL.: "Kikai undo kiko", KABUSHIKI KAISHA GIHODO, 15 October 1957 (1957-10-15), pages 33,175, XP002985693
JONES F.D. ET AL.: "Ingenious mechanisms for designers and inventors volume II", NEW YORK: THE INDUSTRIAL PRESS, 1951, pages 51 - 53, XP002985694
JONES F.D. ET AL.: "Ingenious mechanisms for designers and inventors volume II", NEW YORK: THE INDUSTRIAL PRESS, 1951, pages 51 - 53, XP002985694
Attorney, Agent or Firm:
Yano, Juichiro (Twin 21 MID Tower 34th Floor 1-61, Shiromi
2-chome, Chuo-k, Osaka-shi Osaka, JP)
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