IT1257171B - Comando idraulico - Google Patents
Comando idraulicoInfo
- Publication number
- IT1257171B IT1257171B ITTO920871A ITTO920871A IT1257171B IT 1257171 B IT1257171 B IT 1257171B IT TO920871 A ITTO920871 A IT TO920871A IT TO920871 A ITTO920871 A IT TO920871A IT 1257171 B IT1257171 B IT 1257171B
- Authority
- IT
- Italy
- Prior art keywords
- oil
- cylinder
- relief valve
- tank
- pump
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
- E02F3/435—Control of dipper or bucket position; Control of sequence of drive operations for dipper-arms, backhoes or the like
- E02F3/436—Control of dipper or bucket position; Control of sequence of drive operations for dipper-arms, backhoes or the like for keeping the dipper in the horizontal position, e.g. self-levelling
-
- 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
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
La contemporanea attivazione di una pluralità di funzioni di lavoro di una macchina azionata idraulicamente, ad esempio di un caricatore a pala (backhoe loader), impone elevati requisiti per la capacità della pompa olio. Al fine di diminuire la capacità necessaria, il flusso di olio che viene spinto a pressione a partire da un cilindro caricato passivo, viene utilizzato per compiere il lavoro in un altro cilindro, parallelo ad esso, di guisa che all'altro cilindro viene addotto olio dalla pompa. La pressione necessaria viene raggiunta mediante l'inserimento di una valvola di limitazione della pressione (40) tra il gruppo delle valvole e il serbatoio dell'olio. La valvola di limitazione della pressione può venire comandata (50), di guisa che l'intercettazione del serbatoio può venire rimossa a piacere nel caso che non vi sia necessità della medesima.Sono evidenziate diverse possibilità di comando.Fig. 1
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK178891A DK167322B1 (da) | 1991-10-28 | 1991-10-28 | Hydraulisk kredsloeb |
Publications (3)
Publication Number | Publication Date |
---|---|
ITTO920871A0 ITTO920871A0 (it) | 1992-10-27 |
ITTO920871A1 ITTO920871A1 (it) | 1994-04-27 |
IT1257171B true IT1257171B (it) | 1996-01-05 |
Family
ID=8108063
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ITTO920871A IT1257171B (it) | 1991-10-28 | 1992-10-27 | Comando idraulico |
Country Status (9)
Country | Link |
---|---|
US (1) | US5323687A (it) |
JP (1) | JPH05209423A (it) |
KR (1) | KR950002980B1 (it) |
DE (1) | DE4235762C2 (it) |
DK (1) | DK167322B1 (it) |
FR (1) | FR2683867B1 (it) |
GB (1) | GB2261261B (it) |
IT (1) | IT1257171B (it) |
SE (1) | SE507287C2 (it) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR0174397B1 (ko) * | 1996-05-30 | 1999-04-15 | 토니헬샴 | 로우더의 엔진/펌프 제어장치 |
DE19640100B4 (de) * | 1996-09-28 | 2005-07-14 | Sauer-Danfoss Holding Aps | Hydraulisches System |
JP3923242B2 (ja) * | 2000-07-14 | 2007-05-30 | 株式会社小松製作所 | 油圧駆動機械のアクチュエータ制御装置 |
JP4562948B2 (ja) * | 2001-05-17 | 2010-10-13 | 日立建機株式会社 | 油圧駆動装置 |
DE10216958B8 (de) * | 2002-04-17 | 2004-07-08 | Sauer-Danfoss (Nordborg) A/S | Hydraulische Steuerung |
JP4384977B2 (ja) * | 2002-07-09 | 2009-12-16 | 日立建機株式会社 | 油圧駆動装置 |
US20040129648A1 (en) * | 2002-07-23 | 2004-07-08 | Manesis Nick J. | Antimicrobial matrix and method of use |
AT412113B (de) * | 2002-10-02 | 2004-09-27 | Hoerbiger Hydraulik | Hyraulische betätigungsanordnung |
JP4410512B2 (ja) * | 2003-08-08 | 2010-02-03 | 日立建機株式会社 | 油圧駆動装置 |
US7047735B2 (en) * | 2004-07-30 | 2006-05-23 | Deere & Company | Increasing hydraulic flow to tractor attachments |
JP4766950B2 (ja) * | 2005-08-11 | 2011-09-07 | 日立建機株式会社 | 作業機械の油圧駆動装置 |
DE102009028816A1 (de) * | 2009-08-21 | 2011-02-24 | Deere & Company, Moline | Hydraulische Anordnung |
CN102464096B (zh) * | 2010-11-07 | 2014-05-07 | 中国石化集团胜利石油管理局井下作业公司 | 一种用于海上井口平台防撞击保护的重大安全装置 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE371259B (it) * | 1972-10-05 | 1974-11-11 | Tico Ab | |
DE2457451A1 (de) * | 1974-12-05 | 1976-06-10 | Bosch Gmbh Robert | Hydraulische steuereinrichtung |
US4179981A (en) * | 1975-10-30 | 1979-12-25 | Poclain | Device for sequentially supplying several hydraulic motors |
US3982469A (en) * | 1976-01-23 | 1976-09-28 | Caterpillar Tractor Co. | Apparatus for controlling work element operating pressures in a fluid system |
DE2749312C2 (de) * | 1977-11-04 | 1984-12-20 | Gewerkschaft Eisenhütte Westfalia, 4670 Lünen | Steuereinrichtung mit Nachsetzautomatik für einen hydraulischen Stempelausbau |
US4280783A (en) * | 1979-04-10 | 1981-07-28 | Hayward John A D | Lost motion linkage assembly for a front loader |
JPS5635806A (en) * | 1979-09-01 | 1981-04-08 | Sanyo Kiki Kk | Compound oil pressure circuit |
JPS56501133A (it) * | 1979-09-17 | 1981-08-13 | ||
JPS5923813U (ja) * | 1982-07-31 | 1984-02-14 | 株式会社クリスロン | オ−トマチツクトランスミツシヨンの操縦ハンドル |
JPS6023529A (ja) * | 1983-07-20 | 1985-02-06 | Sumitomo Heavy Ind Ltd | 油圧シヨベルの油圧回路 |
JPS6229569A (ja) * | 1985-07-30 | 1987-02-07 | Ajinomoto Co Inc | トランス−環状イミノ酸誘導体の製造方法 |
CA1334996C (en) * | 1987-04-03 | 1995-03-28 | Toshio Ishiguro | Control system for working machine having boom |
US4825748A (en) * | 1987-07-02 | 1989-05-02 | Parker-Hannifin Corporation | Hydraulic actuator synchronization apparatus and system |
JPH0749666B2 (ja) * | 1987-11-18 | 1995-05-31 | 三陽機器株式会社 | 農業機械トラクター用ローダのアタッチメントを平行移動させ得る油圧駆動装置 |
US4923362A (en) * | 1988-06-06 | 1990-05-08 | Deere & Company | Bucket leveling system with dual fluid supply |
DE4005967C2 (de) * | 1990-02-26 | 1996-05-09 | Rexroth Mannesmann Gmbh | Steueranordnung für mehrere hydraulische Verbraucher |
-
1991
- 1991-10-28 DK DK178891A patent/DK167322B1/da not_active IP Right Cessation
-
1992
- 1992-10-05 SE SE9202900A patent/SE507287C2/sv not_active IP Right Cessation
- 1992-10-22 JP JP4284431A patent/JPH05209423A/ja active Pending
- 1992-10-23 DE DE4235762A patent/DE4235762C2/de not_active Expired - Fee Related
- 1992-10-23 US US07/967,679 patent/US5323687A/en not_active Expired - Lifetime
- 1992-10-26 FR FR9212717A patent/FR2683867B1/fr not_active Expired - Fee Related
- 1992-10-27 GB GB9222601A patent/GB2261261B/en not_active Expired - Fee Related
- 1992-10-27 KR KR1019920019795A patent/KR950002980B1/ko not_active IP Right Cessation
- 1992-10-27 IT ITTO920871A patent/IT1257171B/it active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
FR2683867B1 (fr) | 1995-11-17 |
KR930008318A (ko) | 1993-05-21 |
ITTO920871A1 (it) | 1994-04-27 |
SE507287C2 (sv) | 1998-05-04 |
DE4235762C2 (de) | 1994-09-01 |
JPH05209423A (ja) | 1993-08-20 |
SE9202900L (sv) | 1993-04-29 |
GB2261261B (en) | 1995-09-06 |
DE4235762A1 (de) | 1993-04-29 |
US5323687A (en) | 1994-06-28 |
FR2683867A1 (fr) | 1993-05-21 |
KR950002980B1 (ko) | 1995-03-29 |
DK167322B1 (da) | 1993-10-11 |
GB9222601D0 (en) | 1992-12-09 |
GB2261261A (en) | 1993-05-12 |
ITTO920871A0 (it) | 1992-10-27 |
DK178891D0 (da) | 1991-10-28 |
SE9202900D0 (sv) | 1992-10-05 |
DK178891A (da) | 1993-04-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted | ||
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19971030 |