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Patent Searching and Data


Title:
HYDRAULIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/140986
Kind Code:
A1
Abstract:
A hydraulic device is provided with: a first gear (10) and a second gear (15), which have teeth meshing with each other; a body (3) having a hydraulic chamber (4) for receiving the first gear (10) and the second gear (15); bearing members (20, 25) for rotatably supporting the first and second rotating shafts (11, 12) of the first gear (10) and also rotatably supporting the first and second rotating shafts (16, 17) of the second gear (15); and a front cover (5) and an end cover (7), the front and end cover being respectively liquid-tightly provided and affixed to the opposite end surfaces of the body (3). The direction of a meshing thrust force which acts on the first gear (10) due to the meshing and the direction of a pressure receiving thrust force which acts on the first gear (10) due to an operating fluid on the high-pressure side are the same. The hydraulic device is further provided with a first reaction force application mechanism (40) for applying a reaction force to either the first rotating shaft (11) and/or the second rotating shaft (12) of the first gear (10), the reaction force acting against the resultant of the meshing thrust force and the pressure receiving thrust force, which act on the first gear (10) when the first gear (10) rotates in the forward direction, the first reaction force application mechanism (40) also applying a reaction force to either the first rotating shaft (11) and/or the second rotating shaft (12) of the first gear (10), the reaction force acting against the resultant of the meshing thrust force and the pressure receiving thrust force, which act on the first gear (10) when the first gear (10) rotates in the reverse direction.

Inventors:
TSUNETOMI NOBUHIDE (JP)
HOSOKAWA TETSURO (JP)
Application Number:
PCT/JP2014/057756
Publication Date:
September 24, 2015
Filing Date:
March 20, 2014
Export Citation:
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Assignee:
SUMITOMO PRECISION PROD CO (JP)
International Classes:
F04C2/18; F03C2/08
Domestic Patent References:
WO2013186839A12013-12-19
Foreign References:
JPS5851290A1983-03-25
JP2002168185A2002-06-14
JP2008530436A2008-08-07
JPS5874889A1983-05-06
JP2013241915A2013-12-05
US20040081570A12004-04-29
Attorney, Agent or Firm:
MURAKAMI, SATOSHI (JP)
Tomoji Murakami (JP)
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