DE3217786A1 - Hydraulic lifting device for agricultural machines - Google Patents
Hydraulic lifting device for agricultural machinesInfo
- Publication number
- DE3217786A1 DE3217786A1 DE19823217786 DE3217786A DE3217786A1 DE 3217786 A1 DE3217786 A1 DE 3217786A1 DE 19823217786 DE19823217786 DE 19823217786 DE 3217786 A DE3217786 A DE 3217786A DE 3217786 A1 DE3217786 A1 DE 3217786A1
- Authority
- DE
- Germany
- Prior art keywords
- working piston
- piston rod
- spring
- piston
- stop
- 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.)
- Withdrawn
Links
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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
-
- 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
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/148—Lost-motion means between the piston and the output
-
- 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
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
Description
Hydraulische Hubeinrichtung für landwirtschaftliche MaschinenHydraulic lifting device for agricultural machines
Die Erfindung bezieht sich auf eine hydraulische Hubeinrichtung für landwirtschaftliche Maschinen nach dem Gattungsbegriff des Anspruches 1.The invention relates to a hydraulic lifting device for agricultural machines according to the generic term of claim 1.
Hydraulische Hubeinrichtungen, die bei landwirtschaftlichen Maschinen vor allem zur Schwenkbewegung von Stell- und Geräteteilen verwendet werden, arbeiten nur dann störungs- und fehlerfrei, wenn im gesamten Druckmittel kreislauf keine Luftblasen eingeschlossen sind. Letzteres ist jedoch nicht über eine längere Zeitdauer zu erreichen, weil Luftblasen Im Druckmittel kreislauf immer wieder durch beispielsweise Undichtigkeiten der Rohrleitungen oder Geräte, durch die Verwendung von Schneilkupplungen zum raschen Lösen von Schlauchleitungen, durch Schäumen des hydraulischen Druckmittels oder auch durch örtliche Erhitzungen beim Betrieb der Maschine entstehen.Hydraulic lifting devices used in agricultural machinery mainly used for the pivoting movement of control and device parts, work only trouble-free and error-free if none in the entire pressure medium circuit Air bubbles are included. However, the latter is not over a longer period of time to achieve because air bubbles in the pressure medium circuit repeatedly through, for example Leakages in the pipelines or devices due to the use of snap couplings for quick release of hose lines by foaming the hydraulic pressure medium or caused by local heating during operation of the machine.
Es ist deshalb dringend erforderlich, eine Möglichkeit für die Entlüftung der Druckmittel kreisläufe zu schaffen. Hierzu ist es bekannt, von Hand zu betätigende Entlüftungsschrauben vorzusehen, die an erhöht liegenden Stellen des Druckmittelsystems angeordnet werden, wo sich hauptsächlich die Luftblasen festsetzen. Nachteilig hierbei ist, daß die Entlüftung von Hand und an Stellen der Maschine vorgenommen werden muß, die von der bedienenden Person nur sehr schwer und unter Unfallgefahr erreicht werden können. Außerdem tritt bei jedem Entiüftungsvorgang Öl ins Freie, was zu einer unangenehmen Verschmutzung der Maschine sowie der bedienenden Person führt.It is therefore imperative to have some way of venting to create pressure medium circuits. For this purpose it is known to be operated by hand Provide vent screws at elevated points of the pressure medium system be arranged where mainly the air bubbles settle. Disadvantage here is that the ventilation is carried out by hand and at points on the machine must, which is achieved by the operator only with great difficulty and with the risk of accidents can be. In addition, with every venting process, oil leaks into the open, which to unpleasant soiling of the machine and the operator.
Der Erfindung liegt die Aufgabe zu Grunde, eine hydraulische Hubeinrichtung der im Gattungsbegriff des Anspruches 1 genannten Art zu schaffen, die,ohne Öffnung des Druckmittelkreislaufes nach außenleine Entlüftung vom Schleppersitz aus erlaubt.The invention is based on the object of a hydraulic lifting device to create the type mentioned in the generic term of claim 1, without opening of the pressure medium circuit to the outside, ventilation from the tractor seat is permitted.
Die gestellte Aufgabe wird durch Maßnahmen entsprechend dem Kennzeichen des Anspruches 1 sowie in weiterer Ausgestaltung entsprechend den Kennzeichnungsmerkmalen aus den übrigen Ansprüchen gelöst.The task is set by measures according to the indicator of claim 1 and in a further embodiment according to the identification features solved from the other claims.
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung an einem doppelt wirkenden Hydraulikzylinder in Schnittdarstellung gezeigt und nachfolgend näher beschrieben.In the drawing, an embodiment of the invention is on one double-acting hydraulic cylinder shown in sectional view and below described in more detail.
Mit 1 ist ein Zylinder mit einem darin axial geführten Arbeitskolben 2 bezeichnet, dessen Kolbenstange 3 durch die Stirnwand 4 des Zylinders 1 hindurchgeführt ist.With 1 is a cylinder with a working piston axially guided therein 2, the piston rod 3 of which is passed through the end wall 4 of the cylinder 1 is.
Der Arbeitskolben 2 ist auf einer stirnseitig in die Kolbenstange 3 eingeschraubten Schraube 5 mit Kopf 6 zwischen den beiden Anschlägen 7 und 8 axialbeweglich gegen die Kraft einer Feder 9 geführt, die aus einem auf die Schraube 5 aufgeschobenen und am Anschlag 8 anliegenden Tellerfedernpaket 9 besteht. Im Bereich der Lagerung des Arbeitskolbens 2 auf der Schraube 5 weist diese an ihrem Umfang eine Abflachung 10 auf. Der Arbeitskolben 2 wird durch die Feder 9 mit seiner Stirnseite 11 so gegen die -Stirnseite 7 (als Anschlag 7) der Kolbenstange 3 gepreßt, daß kein Drucköl vom kolbenstangenseitigen Zylinderraum 12 in den kolbenseitigen Zylinderraum 13 fließen kann (gestrichelt gezeichnete Lage des Arbeitskolbens 2).The working piston 2 is on an end face in the piston rod 3 screwed in screw 5 with head 6 between the two stops 7 and 8 axially movable guided against the force of a spring 9, which consists of a pushed onto the screw 5 and plate spring pack 9 resting against the stop 8. In the area of storage of the working piston 2 on the screw 5, this has a flattening on its circumference 10 on. The working piston 2 is counteracted by the spring 9 with its end face 11 the end face 7 (as a stop 7) of the piston rod 3 pressed that no pressure oil from the cylinder space 12 on the piston rod side into the cylinder space 13 on the piston side can flow (position of working piston 2 shown in dashed lines).
Für eine Entlüftung des Druckölkreislaufes wird der Arbeitskolben 2 bis in die mit ausgezogenen Linien gezeichnete Lage gesteuert, in der die Kolbenstange 3 über den Kopf 6 der Schraube 5 am Zylinderboden 14 anliegt. Der Arbeitskolben 2 ist dabei vom Drucköl des kolbenstangenseitigen Arbeitsraumes 12 auf der Schraube 5 axial bis zur Blocklage der Feder 9 bewegt, wodurch die Dichtung zwischen den Stirnseiten 7 der Kolbenstange 5 und 11 des Arbeitskolbens 2 aufgehoben ist. Das Drucköl mit den eingeschlossenen Luftblasen kann also vom kolbenstangenseltigen Arbeitsraum 12 durch den über der Abflachung 10 an der Schraube 5 gebildeten Raum in den kolbenseitigen Arbeitsraum 13 fließen. Der Arbeitskolben 2 wird solange in dieser Endstellung gehalten, bis alle Luftblasen aus dem Druckölkreislauf in den Öltank transportiert sind.The working piston is used to vent the pressure oil circuit 2 controlled to the position drawn with solid lines in which the piston rod 3 rests on the cylinder base 14 via the head 6 of the screw 5. The working piston 2 is from the pressure oil of the piston rod-side working space 12 on the screw 5 axial moved up to the block position of the spring 9, whereby the seal lifted between the end faces 7 of the piston rod 5 and 11 of the working piston 2 is. The pressure oil with the enclosed air bubbles can therefore come from the piston rod Working space 12 through the space formed above the flat 10 on the screw 5 flow into the piston-side working space 13. The working piston 2 is in this end position held until all air bubbles from the pressure oil circuit into the Oil tank are transported.
Die Druckölanschlüsse am Zylinder 1 sind mit 15 und 16 bezeichnet.The pressure oil connections on cylinder 1 are denoted by 15 and 16.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823217786 DE3217786A1 (en) | 1982-05-12 | 1982-05-12 | Hydraulic lifting device for agricultural machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823217786 DE3217786A1 (en) | 1982-05-12 | 1982-05-12 | Hydraulic lifting device for agricultural machines |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3217786A1 true DE3217786A1 (en) | 1983-11-17 |
Family
ID=6163332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19823217786 Withdrawn DE3217786A1 (en) | 1982-05-12 | 1982-05-12 | Hydraulic lifting device for agricultural machines |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3217786A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4923014A (en) * | 1983-12-22 | 1990-05-08 | Multinorm B.V. | Agricultural implement with gas springs and control |
FR2894303A1 (en) * | 2005-12-02 | 2007-06-08 | Pommier S C E B P Sa | Shock-absorbing hydraulic cylinder is divided into narrow chamber and wide chamber by peripheral shoulder, piston of smaller diameter than narrow chamber being mounted in slide which fits closely in wider chamber |
CN102829019A (en) * | 2012-09-06 | 2012-12-19 | 临沂金利液压科技有限公司 | High-performance hydraulic cylinder with oil distribution device |
DE19909751B4 (en) * | 1998-03-10 | 2016-02-11 | Aisin Aw Co., Ltd. | Hydraulic servo for automatic transmission |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1259711B (en) * | 1960-07-01 | 1968-01-25 | Lucien Fulhaber | Hydropneumatic pressure booster with automatic fluid supplementation |
US3390616A (en) * | 1965-10-19 | 1968-07-02 | William L. Hammer | Fluid pressure cylinders having load responsive piston valves |
DE2151194A1 (en) * | 1971-10-14 | 1973-04-19 | Cascade Corp | RELIEF VALVE |
DE2245129A1 (en) * | 1972-09-14 | 1974-03-21 | Bosch Gmbh Robert | WORK CYLINDER |
FR2441751A1 (en) * | 1978-11-18 | 1980-06-13 | Stabilus Gmbh | CYLINDER AND PISTON DEVICE |
-
1982
- 1982-05-12 DE DE19823217786 patent/DE3217786A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1259711B (en) * | 1960-07-01 | 1968-01-25 | Lucien Fulhaber | Hydropneumatic pressure booster with automatic fluid supplementation |
US3390616A (en) * | 1965-10-19 | 1968-07-02 | William L. Hammer | Fluid pressure cylinders having load responsive piston valves |
DE2151194A1 (en) * | 1971-10-14 | 1973-04-19 | Cascade Corp | RELIEF VALVE |
DE2245129A1 (en) * | 1972-09-14 | 1974-03-21 | Bosch Gmbh Robert | WORK CYLINDER |
FR2441751A1 (en) * | 1978-11-18 | 1980-06-13 | Stabilus Gmbh | CYLINDER AND PISTON DEVICE |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4923014A (en) * | 1983-12-22 | 1990-05-08 | Multinorm B.V. | Agricultural implement with gas springs and control |
DE19909751B4 (en) * | 1998-03-10 | 2016-02-11 | Aisin Aw Co., Ltd. | Hydraulic servo for automatic transmission |
FR2894303A1 (en) * | 2005-12-02 | 2007-06-08 | Pommier S C E B P Sa | Shock-absorbing hydraulic cylinder is divided into narrow chamber and wide chamber by peripheral shoulder, piston of smaller diameter than narrow chamber being mounted in slide which fits closely in wider chamber |
CN102829019A (en) * | 2012-09-06 | 2012-12-19 | 临沂金利液压科技有限公司 | High-performance hydraulic cylinder with oil distribution device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8139 | Disposal/non-payment of the annual fee |