HYDRAULIC STEPLESS SPEED CHANGER AND POWER TRANSMISSION DEVICE

Title:

HYDRAULIC STEPLESS SPEED CHANGER AND POWER TRANSMISSION DEVICE

Document Type and Number:

WIPO Patent Application WO/2003/106863

Kind Code:

A1

Abstract:

A hydraulic stepless speed changer comprises a first hydraulic unit having a first plunger and a swash plate with which the first plunger is in contact, and a second hydraulic unit having a second plunger and a swash plate with which the second plunger is in contact. 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 the hydraulic oil in the hydraulic closed circuit. A shaft penetrating through the cylinder block is provided, the shaft and the cylinder block are rotated synchronously, the first and the second plunger hole are formed parallel to the shaft, and the swash plate of the second hydraulic device is supported rotatably about the shaft. The shaft is supported at both sides of the cylinder block by a bearing that functions as a thrust and a radial bearing and by a radial bearing.

Inventors:

OOUCHIDA TAKESHI (JP)
SHIOZAKI SHUJI (JP)
MATSUYAMA HIROSHI (JP)
NIU HIDEKAZU (JP)

Application Number:

PCT/JP2003/007666

Publication Date:

December 24, 2003

Filing Date:

June 17, 2003

Export Citation:

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Assignee:

YANMAR CO LTD (JP)
OOUCHIDA TAKESHI (JP)
SHIOZAKI SHUJI (JP)
MATSUYAMA HIROSHI (JP)
NIU HIDEKAZU (JP)

International Classes:

F16H39/10; F16D1/06; F16H39/14; (IPC1-7): F16H39/14

Domestic Patent References:

WO1996031715A1

1996-10-10

Foreign References:

JP2002031209A	2002-01-31
JPS6272955A	1987-04-03

Other References: