Title:
HYDRAULIC STEPLESS SPEED CHANGER AND POWER TRANSMISSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2003/106864
Kind Code:
A1
Abstract:
A hydraulic stepless speed changer comprises a first hydraulic device and a second hydraulic device. In a cylinder block, there are formed a first and a second plunger hole for respectively accommodating the first and the second plunger, a hydraulic closed circuit connecting the first and the second plunger hole, and a distribution valve hole accommodating a distribution valve for switching the flow direction of hydraulic oil in the hydraulic closed circuit. A shaft penetrating through the cylinder block and the cylinder block are rotated synchronously, the first and the second plunger hole is formed parallel to the shaft, and a swash plate of the second hydraulic device is supported rotatably about the shaft. The first and the second plunger are biased toward swash plate sides by springs provided in the respective first and second plunger holes. A swash plate of the first hydraulic device and the swash plate of the second hydraulic device are supported respectively by outer rings of a first and a second thrust bearing-cum-radial bearing, and inner rings of the first and the second thrust bearing-cum-radial bearing are prevented from being moved in an axial direction of the shaft.
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Inventors:
OOUCHIDA TAKESHI (JP)
SHIOZAKI SHUJI (JP)
MATSUYAMA HIROSHI (JP)
NIU HIDEKAZU (JP)
SHIOZAKI SHUJI (JP)
MATSUYAMA HIROSHI (JP)
NIU HIDEKAZU (JP)
Application Number:
PCT/JP2003/007667
Publication Date:
December 24, 2003
Filing Date:
June 17, 2003
Export Citation:
Assignee:
YANMAR CO LTD (JP)
OOUCHIDA TAKESHI (JP)
SHIOZAKI SHUJI (JP)
MATSUYAMA HIROSHI (JP)
NIU HIDEKAZU (JP)
OOUCHIDA TAKESHI (JP)
SHIOZAKI SHUJI (JP)
MATSUYAMA HIROSHI (JP)
NIU HIDEKAZU (JP)
International Classes:
F16H39/14; F16H47/02; F16H47/04; (IPC1-7): F16H39/14
Domestic Patent References:
| WO1996031715A1 | 1996-10-10 |
Foreign References:
| JP2002031209A | 2002-01-31 | |||
| JPS6272955A | 1987-04-03 |
Other References:
See also references of EP 1515068A4
None
None
Attorney, Agent or Firm:
Onda, Hironori (Ohmiya-cho 2-chome Gifu-shi, Gifu, JP)
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