EP1600642A1 - Hydraulic device - Google Patents
Hydraulic device Download PDFInfo
- Publication number
- EP1600642A1 EP1600642A1 EP04716722A EP04716722A EP1600642A1 EP 1600642 A1 EP1600642 A1 EP 1600642A1 EP 04716722 A EP04716722 A EP 04716722A EP 04716722 A EP04716722 A EP 04716722A EP 1600642 A1 EP1600642 A1 EP 1600642A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid pressure
- cylinder
- inner cylinder
- tank chamber
- electric motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/02—Pumping installations or systems having reservoirs
- F04B23/021—Pumping installations or systems having reservoirs the pump being immersed in the reservoir
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/02—Pumping installations or systems having reservoirs
- F04B23/025—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir
- F04B23/026—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir a pump-side forming a wall of the reservoir
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/18—Combined units comprising both motor and pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
- F15B7/06—Details
- F15B7/10—Compensation of the liquid content in a system
Definitions
- the wall 40 is mounted on one end of the electric motor 6, and thereby the tank body 36 is fixed to the electric motor 6.
- a rotating shaft 42 of the electric motor 6 is provided so as to be positioned coaxially with the outer cylinder 32 and the inner cylinder 34.
- the fluid pressure is introduced through both ports 14 and 16 of the fluid pressure cylinder 12, and the cylinder rod 86 is made difficult to move by a small external force even if the external force is applied to the cylinder rod 86 and, therefore, is prevented from deflecting.
- the tank chamber 18 is preloaded by the piston 44 regardless of the installation position of the tank body 36, there is no restriction on the installation position of the fluid pressure apparatus.
- the circular tank chamber 18 is provided outside the fluid pressure pump 1, a sufficient volume of the tank chamber 18 can be secured and downsizing of the fluid pressure apparatus can be achieved.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Pressure Circuits (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims (5)
- A fluid pressure apparatus provided with a fluid pressure pump driven by an electric motor and rotatable in both directions, both ports of a fluid pressure actuator and both ports of the fluid pressure pump being respectively connected through a pair of pipe lines,
wherein a sliding cavity is formed between an outer cylinder and an inner cylinder, the sliding cavity being divided into a preload chamber and a tank chamber by a piston slidably inserted in the sliding cavity,
wherein the tank chamber and the pair of pipe lines are connected through check valves respectively provided in directions so as to allow discharge from the tank chamber, the tank chamber being preloaded with the air pressure introduced into the preload chamber,
and wherein the fluid pressure pump is disposed in the inner cylinder. - The fluid pressure apparatus as set forth in claim 1, wherein the fluid pressure pump is a swash plate piston pump.
- The fluid pressure apparatus as set forth in claim 1 or claim 2, wherein the outer cylinder and the inner cylinder are arranged coaxially with a rotating shaft of the electric motor, and the outer cylinder and the inner cylinder are mounted on the electric motor.
- The fluid pressure apparatus as set forth in claim 1 to claim 3, wherein the tank chamber communicates with the inside of the inner cylinder.
- The fluid pressure apparatus as set forth in claim 1 to claim 4, wherein a top end of the rotating shaft of the electric motor is rotatably supported by a lid member closing one end of the outer cylinder and one end of the inner cylinder.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003056258 | 2003-03-03 | ||
JP2003056258A JP2004263806A (en) | 2003-03-03 | 2003-03-03 | Hydraulic apparatus |
PCT/JP2004/002660 WO2004079205A1 (en) | 2003-03-03 | 2004-03-03 | Hydraulic device |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1600642A1 true EP1600642A1 (en) | 2005-11-30 |
EP1600642A4 EP1600642A4 (en) | 2007-07-04 |
EP1600642B1 EP1600642B1 (en) | 2008-10-15 |
Family
ID=32958691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04716722A Expired - Fee Related EP1600642B1 (en) | 2003-03-03 | 2004-03-03 | Hydraulic device |
Country Status (6)
Country | Link |
---|---|
US (1) | US20050175467A1 (en) |
EP (1) | EP1600642B1 (en) |
JP (1) | JP2004263806A (en) |
KR (1) | KR20050105971A (en) |
DE (1) | DE602004017135D1 (en) |
WO (1) | WO2004079205A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102454647A (en) * | 2010-10-20 | 2012-05-16 | 住友重机械工业株式会社 | Injection molding machine and hydraulic actuator |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4317862B2 (en) | 2006-09-15 | 2009-08-19 | 三菱重工業株式会社 | Track system |
US10871174B2 (en) | 2015-10-23 | 2020-12-22 | Aol | Prime mover system and methods utilizing balanced flow within bi-directional power units |
WO2020106291A1 (en) * | 2018-11-21 | 2020-05-28 | Aoi (Advanced Oilfield Innovations, Dba A. O. International Ii, Inc.) | Prime mover system and methods utilizing balanced fluid flow |
DE102019215975A1 (en) * | 2019-10-17 | 2021-04-22 | Deere & Company | Hydraulic arrangement |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1026101A (en) * | 1996-07-10 | 1998-01-27 | Opton Co Ltd | Hydraulic pressure device |
GB2359871A (en) * | 2000-01-06 | 2001-09-05 | Baker Hughes Inc | Electrohydraulic valve actuator |
US20020127126A1 (en) * | 2000-08-01 | 2002-09-12 | Kaempe Staffan I. | Bi-rotational pump/hydraulic actuator |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2457467A (en) * | 1945-03-08 | 1948-12-28 | Cons Vultee Aircraft Corp | Electrically and hydraulically operated extensible strut |
JPS61294201A (en) * | 1985-06-24 | 1986-12-25 | Matsushita Electric Ind Co Ltd | Hydraulic unit |
JPS63150102U (en) * | 1987-03-23 | 1988-10-03 | ||
JPS63176880A (en) * | 1988-01-12 | 1988-07-21 | Ogura:Kk | Hydraulic actuator |
US5144801A (en) * | 1989-04-28 | 1992-09-08 | Parker Hannifin Corporation | Electro-hydraulic actuator system |
JPH0960607A (en) * | 1995-08-23 | 1997-03-04 | Opton Co Ltd | Hydraulic driving device |
FR2831226B1 (en) * | 2001-10-24 | 2005-09-23 | Snecma Moteurs | AUTONOMOUS ELECTROHYDRAULIC ACTUATOR |
-
2003
- 2003-03-03 JP JP2003056258A patent/JP2004263806A/en active Pending
-
2004
- 2004-03-03 US US10/520,971 patent/US20050175467A1/en not_active Abandoned
- 2004-03-03 EP EP04716722A patent/EP1600642B1/en not_active Expired - Fee Related
- 2004-03-03 DE DE602004017135T patent/DE602004017135D1/en not_active Expired - Lifetime
- 2004-03-03 KR KR1020057001346A patent/KR20050105971A/en not_active Application Discontinuation
- 2004-03-03 WO PCT/JP2004/002660 patent/WO2004079205A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1026101A (en) * | 1996-07-10 | 1998-01-27 | Opton Co Ltd | Hydraulic pressure device |
GB2359871A (en) * | 2000-01-06 | 2001-09-05 | Baker Hughes Inc | Electrohydraulic valve actuator |
US20020127126A1 (en) * | 2000-08-01 | 2002-09-12 | Kaempe Staffan I. | Bi-rotational pump/hydraulic actuator |
Non-Patent Citations (1)
Title |
---|
See also references of WO2004079205A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102454647A (en) * | 2010-10-20 | 2012-05-16 | 住友重机械工业株式会社 | Injection molding machine and hydraulic actuator |
Also Published As
Publication number | Publication date |
---|---|
US20050175467A1 (en) | 2005-08-11 |
KR20050105971A (en) | 2005-11-08 |
DE602004017135D1 (en) | 2008-11-27 |
WO2004079205A1 (en) | 2004-09-16 |
EP1600642B1 (en) | 2008-10-15 |
JP2004263806A (en) | 2004-09-24 |
EP1600642A4 (en) | 2007-07-04 |
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