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Patent Searching and Data


Title:
HYDRAULIC DEVICE
Document Type and Number:
Japanese Patent JP2005083497
Kind Code:
A
Abstract:

To solve problems wherein the number of parts affecting precision of reciprocating movement of a spool valve is large, it is difficult to keep precision, and manufacturing cost is increased in a conventional hydraulic device provided with an input shaft and an output shaft arranged so that their axial lines become one straight line, a plunger and the spool valve reciprocating and sliding in the direction of axial line, a cylinder block storing them and rotating integrally with the input shaft, an input side swash plate abutting on the plunger on a swash plate face, and an output side swash plate rotating integrally with the output shaft while abutting on the plunger on a swash plate face and forming a hydraulic circuit communicating a hole storing the plunger in the cylinder block to change over a flow passage of the hydraulic circuit by the spool valve.

This hydraulic device is provided with a pair of spool valve guides 37, 47 in which guide channels inclined for axial line are provided, and the spool valve is engaged with holding members 38, 48 attached to the guide channels.


Inventors:
OUCHIDA TAKASHI
SHIOZAKI SHUJI
NIBU HIDEKAZU
MATSUYAMA HIROSHI
Application Number:
JP2003000317071
Publication Date:
March 31, 2005
Filing Date:
September 09, 2003
Export Citation:
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Assignee:
YANMAR CO LTD
International Classes:
F04B1/22; F04B53/10; F16H39/14; (IPC1-7): F16H39/14; F04B1/22; F04B53/10
Attorney, Agent or Firm:
矢野 寿一郎