[go: up one dir, main page]

DE102004005402A1 - Lifting cylinder raising and lowering system for utility vehicle uses hydraulic pump connected to 2/2-way valve connected to 2-way current regulation valve and cylinder - Google Patents

Lifting cylinder raising and lowering system for utility vehicle uses hydraulic pump connected to 2/2-way valve connected to 2-way current regulation valve and cylinder Download PDF

Info

Publication number
DE102004005402A1
DE102004005402A1 DE200410005402 DE102004005402A DE102004005402A1 DE 102004005402 A1 DE102004005402 A1 DE 102004005402A1 DE 200410005402 DE200410005402 DE 200410005402 DE 102004005402 A DE102004005402 A DE 102004005402A DE 102004005402 A1 DE102004005402 A1 DE 102004005402A1
Authority
DE
Germany
Prior art keywords
valve
lifting cylinder
way
way valve
arrangement according
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
Application number
DE200410005402
Other languages
German (de)
Other versions
DE102004005402B4 (en
Inventor
Thomas Dipl.-Ing. Stolten
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jungheinrich AG
Original Assignee
Jungheinrich AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jungheinrich AG filed Critical Jungheinrich AG
Priority to DE200410005402 priority Critical patent/DE102004005402B4/en
Publication of DE102004005402A1 publication Critical patent/DE102004005402A1/en
Application granted granted Critical
Publication of DE102004005402B4 publication Critical patent/DE102004005402B4/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/22—Hydraulic devices or systems
    • 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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/0413—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed in one direction only, with no control in the reverse direction, e.g. check valve in parallel with a throttle valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/27—Directional control by means of the pressure source
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3052—Shuttle valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40553—Flow control characterised by the type of flow control means or valve with pressure compensating valves
    • F15B2211/40561—Flow control characterised by the type of flow control means or valve with pressure compensating valves the pressure compensating valve arranged upstream of the flow control means
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40576—Assemblies of multiple valves
    • F15B2211/40584—Assemblies of multiple valves the flow control means arranged in parallel with a check valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/41—Flow control characterised by the positions of the valve element
    • F15B2211/413—Flow control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/426—Flow control characterised by the type of actuation electrically or electronically
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/428—Flow control characterised by the type of actuation actuated by fluid pressure
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/46—Control of flow in the return line, i.e. meter-out control
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/47—Flow control in one direction only
    • F15B2211/473—Flow control in one direction only without restriction in the reverse direction
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7052—Single-acting output members
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/75—Control of speed of the output member

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The lifting cylinder control system has a pump (10) supplying high-pressure fluid (P) to a valve (12) connected (T) to the low-pressure reservoir (14). The valve has a connection (H) to the 2/2 control valve (16). The position of the valve may be set by a spring (28) and an electromagnet (30). Fluid flows through a pipe (18) from the valve to a 2-way current regulation valve (20) and the lifting cylinder (22). The current regulation valve has a preloading spring (46) and control connections (40,42).

Description

Die Erfindung bezieht sich auf eine Ventilanordnung für das Heben und Senken eines Hubzylinders, insbesondere in einem Flurförderzeug, nach dem Oberbegriff des Patentanspruchs 1.The The invention relates to a valve assembly for lifting and lowering a lifting cylinder, in particular in an industrial truck, according to the preamble of claim 1.

Es ist bekannt, in den Weg zwischen einer Hydraulikpumpe und einem Hubzylinder ein 3/3-Wegeventil oder zwei separat voneinander getrennte Ventile anzuordnen. Die Ventile sind mit entsprechenden Vorsteuermitteln ausgestattet, z. B. Elektromagneten, welche die Ventile zum Ansteuern eines gewünschten Betriebszustands verstellen. Hierunter ist das Heben und Senken sowie die Lasthaltung zu verstehen. Bei der Lasthaltung soll der Hubzylinder in der eingenommenen Position gehalten werden.It is known in the way between a hydraulic pump and a Lift cylinder a 3/3-way valve or two separately separated valves to arrange. The valves are equipped with appropriate pilot control means equipped, z. B. electromagnet, which the valves for driving a desired one Adjust operating state. Among them is the lifting and lowering as well as the load attitude to understand. In the load attitude of the Lifting cylinders are held in the assumed position.

Die Lasthaltung wird üblicherweise durch ein Rückschlagventil realisiert. Bei einem 3/3-Wegeventil erfolgt die Lasthaltung in der Neutralstellung des Ventils, während der Hebenvorgang eine Betätigung in einer Richtung und der Senkvorgang eine Betätigung in der entgegengesetzten Richtung erfordert. Der Senkzweig des bekannten 3/3-Wegeventils wird häufig als verstellbare Drossel ausgebildet, um die Senkgeschwindigkeit einzustellen bzw. zu begrenzen.The Load is usually through a check valve realized. In a 3/3-way valve, the load is held in the neutral position of the valve, while the lifting process a Actuation in one direction and the lowering operation in the opposite Direction requires. The Senkzweig the well-known 3/3-way valve becomes common designed as an adjustable throttle to the lowering speed to set or limit.

Der Erfindung liegt die Aufgabe zugrunde, eine Ventilanordnung für das Heben und Senken eines Hubzylinders, insbesondere in einem Flurförderzeug, zu schaffen, die mit einfacheren Mitteln verwirklicht werden kann.Of the Invention is based on the object, a valve assembly for lifting and lowering a lifting cylinder, in particular in an industrial truck, which can be achieved with simpler means.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst.These The object is solved by the features of claim 1.

Bei erfindungsgemäßer Ventilanordnung ist die Pumpe über ein Wechselventil in seiner ersten Stellung und ein 2/2-Wegeventil mit dem Hubzylinder und der Hubzylinder über das 2/2-Wegeventil und das Wechselventil in seiner zweiten Stellung mit dem Tank verbunden, wenn ein einziges Vorsteuermittel das 2/2-Wegeventil aus der Neutralstellung in eine Schaltstellung verstellt.at inventive valve arrangement is the pump over a shuttle valve in its first position and a 2/2-way valve with the lifting cylinder and the lifting cylinder via the 2/2-way valve and the Shuttle valve in its second position connected to the tank, if a single pilot means the 2/2-way valve from the neutral position adjusted to a switching position.

Das erfindungsgemäß verwendete 2/2-Wegeventil weist eine Neutral- oder Ruhestellung auf, in der es die Lasthaltung realisiert. In seiner Schaltstellung öffnet es einen Durchgang für den Volumenstrom der Pumpe zum Hubzylinder. Gleichzeitig ist ein Durchgang für die Senkphase vom Hubzylinder zum Tank geschaffen. Die Umschaltung von der Pumpe auf den Tank und umgekehrt erfolgt mit Hilfe eines Wechselventils, dessen einer Anschluß mit der Pumpe und dessen anderer Anschluß mit dem Tank verbunden ist, während ein Anschluß dazwischen mit dem Eingang des 2/2-Wegeventils verbunden ist. Das erfindungsgemäß vorgesehene Wechselventil ermöglicht daher den Fluß des Hydraulikmediums von der Pumpe zum Hubzylinder in der Hebenphase und den Fluß des Mediums vom Hubzylinder zum Tank in der Senkphase, indem das Ventilglied im Wechselventil entsprechend verteilt wird.The used according to the invention 2/2-way valve has a neutral or rest position, in the it realizes the load attitude. In its switching position it opens a passage for the flow rate of the pump to the lifting cylinder. At the same time is one Passage for created the lowering of the lifting cylinder to the tank. Switching from the pump to the tank, and vice versa, by means of a shuttle valve, whose one connection with the pump and its other connection is connected to the tank, while a connection in between connected to the input of the 2/2-way valve. The inventively provided Shuttle valve allows hence the flow of Hydraulic medium from the pump to the lifting cylinder in the lifting phase and the river of Medium from the lifting cylinder to the tank in the lowering phase by the valve member is distributed accordingly in the shuttle valve.

Die Erfindung hat den Vorteil, daß ein einfaches 2/2-Wegeventil vorzusehen ist mit nur einer aktiven Schaltstellung. Zur Ansteuerung ist lediglich ein einziges Vorsteuermittel erforderlich, etwa in Form eines Elektromagneten, wie für Hydraulikventile allgemein üblich. Es versteht sich, daß auch eine Ansteuerung über ein sogenanntes Vorsteuerventil erfolgen kann, das hydraulisch oder pneumatisch arbeitet. Mithin verringert sich bei der Erfindung auch der Aufwand für die Vorsteuerung.The Invention has the advantage that a simple 2/2-way valve is provided with only one active switching position. To control only a single pilot control is required such as in the form of an electromagnet, as common for hydraulic valves. It it goes without saying that too a control over a so-called pilot valve can be done, the hydraulic or works pneumatically. Thus, in the invention also decreases the effort for the feedforward control.

Wird für das Heben und Senken die gleiche Volumenstrommenge benötigt, ist ein einfacher Ventildurchgang in beiden Richtungen ausreichend. Ist hingegen eine Verstellung des Öffnungsquerschnitts im Ventildurchgang gewünscht, ist nach einer Ausgestaltung der Erfindung im Durchgang des 2/2-Wegeventils in seiner Schaltstellung eine vom Vorsteuermittel verstellbare Drossel vorgesehen, die in Abhängigkeit von einem das Vorsteuermittel steuernden Steuersignal verstellt wird.Becomes for the Lifting and lowering the same volume flow rate is needed a simple valve passage in both directions is sufficient. If, however, an adjustment of the opening cross-section in the valve passage desired is in one embodiment of the invention in the passage of the 2/2-way valve in its switching position adjustable by the pilot control throttle provided, depending on adjusted by a control signal controlling the pilot control means becomes.

Häufig wird für das Heben ein größerer Volumenstrom benötigt, während die Senkgeschwindigkeit aufgrund einer Normfestlegung begrenzt ist. Daher ist nach einer Ausgestaltung der Erfindung vorgesehen, daß parallel zur Drossel ein Zweig geschaltet ist, der ein beim Heben des Hubzylinders öffnendes Rückschlagventil enthält. Beim Heben wird daher ein Zusatzkanal geöffnet, der beim Senken durch das Rückschlagventil aufgrund des zurückströmenden Mediums geschlossen wird. Während des Senkens kann der Volumenstrom über eine proportional arbeitende Drossel begrenzt werden.Frequently becomes for the Lift a larger volume flow needed while the lowering speed is limited due to a standard definition. Therefore, it is provided according to an embodiment of the invention that in parallel a branch is connected to the throttle, which opens a lifting valve lifting the lifting cylinder contains. When lifting, therefore, an additional channel is opened, the sinking through the check valve due to the backflowing medium is closed. While of lowering, the volume flow can be proportional to a working Throttle be limited.

Das Wechselventil wird bei der Erfindung vorzugsweise durch geeignete Mittel gegen den mit der Pumpe verbundenen Anschluß vorgespannt und zwar nach einer weiteren Ausgestaltung entweder durch Schwerkraft und/oder mit Hilfe einer Feder.The Shuttle valve is in the invention preferably by suitable Medium biased against the connected to the pump port and that according to another embodiment either by gravity and / or with the help of a spring.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand einer Zeichnung näher erläutert.One embodiment The invention will be explained in more detail with reference to a drawing.

Die einzige Figur zeigt ein Schaltbild einer Ventilanordnung nach der Erfindung.The only figure shows a circuit diagram of a valve assembly according to the Invention.

In der einzigen Figur speist eine Hydraulikpumpe 10 in den ersten Anschluß P eines Wechselventils 12. Der zweite gegenüberliegende Anschluß T führt zum Tank 14 für die Pumpe 10. Ein seitlicher Anschluß H führt zu einem 2/2-Wegeventil 16, das mit den Ausgängen 2 und wahlweise mit einer Leitung 18 verbunden ist. Diese führt über ein Zweiwege-Stromregler 20 zu einem hydraulischen Hubzylinder 22. Parallel zum Zweiwege-Stromregler 20 liegt ein Zweig 24, mit einem Rückschlagventil 26. Der Zweiwege-Stromregler 20 mit den Steuerleitungen 40, 42 und der Vorspannfeder 46 ist eine Senkbremse, die eine lastunabhängige Senkgeschwindigkeit realisiert, wie an sich bekannt.In the only figure feeds a hydraulic pump 10 in the first port P of a shuttle valve 12 , The second opposite connection T leads to the tank 14 for the pump 10 , A side port H leads to a 2/2-way valve 16 that with the outputs 2 and optionally with a line 18 connected is. This leads via a two-way current regulator 20 to a hydraulic lifting cylinder 22 , Parallel to the two-way current controller 20 lies a branch 24 , with a check valve 26 , The two-way current regulator 20 with the control lines 40 . 42 and the biasing spring 46 is a lowering brake that realizes a load-independent lowering speed, as known per se.

Der nicht gezeigte Schieber des 2/2-Wegeventils wird an einem Ende von einer Feder 28 vorgespannt und am gegenüberliegenden Ende von einem Elektromagneten 30 betätigt, der von einer Spannungsquelle mit unterschiedlicher Spannung beaufschlagt werden kann (nicht gezeigt), was durch den Pfeil 32 angedeutet ist.The slide of the 2/2-way valve, not shown, is at one end by a spring 28 biased and at the opposite end by an electromagnet 30 actuated, which can be acted upon by a voltage source with a different voltage (not shown), which is indicated by the arrow 32 is indicated.

In der Neutral- oder unbetätigten Stellung des 2/2-Wegeventils ist der Durchgang gesperrt, und ein Rückschlagventil 34 übernimmt die Lasthaltung.In the neutral or de-energized position of the 2/2-way valve, the passage is blocked, and a check valve 34 takes over the load attitude.

Der Durchgang des 2/2-Wegeventils in betätigter Stellung wird von einer Drossel 36 und einem zur Drossel parallel geschalteten Zweig mit einem Rückschlagventil 38 gebildet. In der erwähnten Schaltstellung ist der Ausgang 1 mit der Leitung 18 in Verbindung.The passage of the 2/2-way valve in the actuated position is from a throttle 36 and a branch connected in parallel to the throttle with a check valve 38 educated. In the mentioned switching position is the output 1 with the line 18 in connection.

Für den Hebenvorgang wird das 2/2-Wegeventil 16 angesteuert und in die Schaltstellung gebracht. Die Kugel des Wechselventils 12 verschließt den Anschluß T zum Tank 14, und das Medium gelangt von der Pumpe über das Wechselventil 12 und über die Parallelschaltung der beiden Zweige im 2/2-Wegeventil und das Rückschlagventil 26 zum Hubzylinder 22.For the lifting process, the 2/2-way valve 16 activated and brought into the switching position. The ball of the shuttle valve 12 closes the connection T to the tank 14 , and the medium passes from the pump via the shuttle valve 12 and via the parallel connection of the two branches in the 2/2-way valve and the check valve 26 to the lifting cylinder 22 ,

Ist hingegen die Pumpe inaktiv, befindet sich die Kugel im Wechselventil 12 in der in der Figur gezeigten Position. Hydraulikmedium aus dem Hubzylinder 22 fließt dann über Zweiwege-Stromregler 20 und die Drossel 36 über das Wechselventil 12 zum Tank 14. Die Senkgeschwindigkeit wird dabei über den verstellbaren Querschnitt der Drossel 36 eingestellt.However, if the pump is inactive, the ball is in the shuttle valve 12 in the position shown in the figure. Hydraulic medium from the lifting cylinder 22 then flows via two-way current controller 20 and the throttle 36 over the shuttle valve 12 to the tank 14 , The lowering speed is over the adjustable cross section of the throttle 36 set.

Claims (7)

Ventilanordnung für das Heben und Senken eines Hubzylinders, insbesondere in einem Flurförderzeug, mit einem Wegeventil, das bei entsprechender Vorsteuerung über Vorsteuermittel wahlweise eine Pumpe oder einen Tank mit dem Hubzylinder verbindet und in einer Neutralstellung den Hubzylinder in der eingenommenen Position hält, dadurch gekennzeichnet, daß die Pumpe (10) über ein Wechselventil (12) in seiner ersten Stellung und ein 2/2-Wegeventil (16) mit dem Hubzylinder (22) und der Hubzylinder (22) über das 2/2-Wegeventil (16) und das Wechselventil (12) in seiner zweiten Stellung mit dem Tank (14) verbunden ist, wenn ein einziges Vorsteuermittel das 2/2-Wegeventil (16) aus der Neutralstellung in eine Schaltstellung verstellt.Valve arrangement for raising and lowering a lifting cylinder, in particular in an industrial truck, with a directional control valve which selectively connects a pilot pump or a tank with the lifting cylinder with appropriate feedforward control and holds in a neutral position the lifting cylinder in the assumed position, characterized in that the pump ( 10 ) via a shuttle valve ( 12 ) in its first position and a 2/2-way valve ( 16 ) with the lifting cylinder ( 22 ) and the lifting cylinder ( 22 ) via the 2/2-way valve ( 16 ) and the shuttle valve ( 12 ) in its second position with the tank ( 14 ) is connected when a single pilot control means the 2/2-way valve ( 16 ) adjusted from the neutral position into a switching position. Ventilanordnung nach Anspruch 1, dadurch gekennzeichnet, daß der Durchgang des 2/2-Wegeventils (16) in seiner Schaltstellung eine von dem Vorsteuermittel verstellbare Drossel (36) enthält und das Vorsteuermittel die Drossel (26) in Abhängigkeit von einem Vorsteuersignal verstellt.Valve arrangement according to claim 1, characterized in that the passage of the 2/2-way valve ( 16 ) in its switching position an adjustable by the pilot control throttle ( 36 ) and the pilot control means contains the throttle ( 26 ) adjusted in response to a pilot signal. Ventilanordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Vorsteuermittel ein Elektromagnet (30) ist.Valve arrangement according to Claim 1 or 2, characterized in that the pilot control means is an electromagnet ( 30 ). Ventilanordnung nach Anspruch 2 und 3, dadurch gekennzeichnet, daß der Elektromagnet (30) die Drossel (36) in Abhängigkeit von der angelegten Steuerspannung betätigt.Valve arrangement according to Claims 2 and 3, characterized in that the electromagnet ( 30 ) the throttle ( 36 ) in response to the applied control voltage. Ventilanordnung nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß der Drossel (36) ein Zweig parallel geschaltet ist, der einen beim Heben des Hubzylinders (22) öffnendes Rückschlagventil (38) enthält.Valve arrangement according to one of claims 2 to 4, characterized in that the throttle ( 36 ) a branch is connected in parallel, the one when lifting the lifting cylinder ( 22 ) opening check valve ( 38 ) contains. Ventilanordnung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Ventilglied des Wechselventils (12) gegen den mit der Pumpe (10) verbundenen Anschluß (P) vorgespannt ist.Valve arrangement according to one of claims 1 to 5, characterized in that the valve member of the shuttle valve ( 12 ) against the pump ( 10 ) connected terminal (P) is biased. Ventilanordnung nach Anspruch 6, dadurch gekennzeichnet, daß die Vorspannung mittels Schwerkraft und/oder einer Feder erfolgt.Valve arrangement according to claim 6, characterized that the Bias by gravity and / or a spring takes place.
DE200410005402 2004-02-03 2004-02-03 Valve arrangement for lifting and lowering a lifting cylinder Expired - Fee Related DE102004005402B4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE200410005402 DE102004005402B4 (en) 2004-02-03 2004-02-03 Valve arrangement for lifting and lowering a lifting cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200410005402 DE102004005402B4 (en) 2004-02-03 2004-02-03 Valve arrangement for lifting and lowering a lifting cylinder

Publications (2)

Publication Number Publication Date
DE102004005402A1 true DE102004005402A1 (en) 2005-08-18
DE102004005402B4 DE102004005402B4 (en) 2006-01-05

Family

ID=34801530

Family Applications (1)

Application Number Title Priority Date Filing Date
DE200410005402 Expired - Fee Related DE102004005402B4 (en) 2004-02-03 2004-02-03 Valve arrangement for lifting and lowering a lifting cylinder

Country Status (1)

Country Link
DE (1) DE102004005402B4 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2786958A1 (en) * 2013-04-05 2014-10-08 Bosch Rexroth Oil Control S.p.A. Control device for the descent of a load
CN108561347A (en) * 2018-05-31 2018-09-21 武汉船用机械有限责任公司 A kind of oil cylinder hydraulic control system
CN111677710A (en) * 2020-06-09 2020-09-18 中国石油天然气集团有限公司 Hydraulic oil adjusting device for gas drilling underground power system
IT202300004146A1 (en) * 2023-03-07 2024-09-07 Valvole Italia S R L DESCENT CONTROL DEVICE FOR AN OLEODYNAMIC CYLINDER, IN PARTICULAR FOR CONTROLLING THE DESCENT OF AN OPERATING ARM

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007027567B4 (en) * 2007-06-15 2018-03-01 Robert Bosch Gmbh Control arrangement with pipe rupture function
WO2025199187A1 (en) * 2024-03-21 2025-09-25 Enerpac Tool Group Corp. Hydraulic systems for raising and lowering loads

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3148852A1 (en) * 1981-12-10 1983-06-23 Emil Dautel GmbH, 7105 Leingarten Electrohydraulic control circuit for a tailgate
DE20208577U1 (en) * 2002-06-03 2003-12-11 Hawe Hydraulik Gmbh & Co. Kg Electro-hydraulic lift control device for industrial trucks

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3148852A1 (en) * 1981-12-10 1983-06-23 Emil Dautel GmbH, 7105 Leingarten Electrohydraulic control circuit for a tailgate
DE20208577U1 (en) * 2002-06-03 2003-12-11 Hawe Hydraulik Gmbh & Co. Kg Electro-hydraulic lift control device for industrial trucks

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2786958A1 (en) * 2013-04-05 2014-10-08 Bosch Rexroth Oil Control S.p.A. Control device for the descent of a load
CN108561347A (en) * 2018-05-31 2018-09-21 武汉船用机械有限责任公司 A kind of oil cylinder hydraulic control system
CN111677710A (en) * 2020-06-09 2020-09-18 中国石油天然气集团有限公司 Hydraulic oil adjusting device for gas drilling underground power system
CN111677710B (en) * 2020-06-09 2022-06-07 中国石油天然气集团有限公司 Hydraulic oil adjusting device for gas drilling underground power system
IT202300004146A1 (en) * 2023-03-07 2024-09-07 Valvole Italia S R L DESCENT CONTROL DEVICE FOR AN OLEODYNAMIC CYLINDER, IN PARTICULAR FOR CONTROLLING THE DESCENT OF AN OPERATING ARM
EP4428376A1 (en) * 2023-03-07 2024-09-11 Valvole Italia S.r.l. Descent control device for a hydraulic cylinder, in particular for controlling the descent of an operating arm

Also Published As

Publication number Publication date
DE102004005402B4 (en) 2006-01-05

Similar Documents

Publication Publication Date Title
DE4140409A1 (en) ELECTROHYDRAULIC CONTROL DEVICE
EP0016719B1 (en) Hydraulic motor control device
EP2142808B1 (en) Hydraulic control arrangement
EP2157320B1 (en) Hydraulic device for a hydro motor
DE102004005402A1 (en) Lifting cylinder raising and lowering system for utility vehicle uses hydraulic pump connected to 2/2-way valve connected to 2-way current regulation valve and cylinder
EP2466154B1 (en) Electrohydraulic control device
DE3422164C2 (en) Hydraulic system with at least two consumers of hydraulic energy
DE102007014550A1 (en) valve assembly
EP0823559B1 (en) Hydraulic control device
DE19548943B4 (en) valve assembly
DE19709958B4 (en) Hydrostatic drive system
EP1875084B1 (en) Directional control valve and control system provided therewith
DE10011016A1 (en) Method and hydraulic steering device for emergency steering with a steering handwheel
DE10321914A1 (en) Hydraulic control arrangement
EP2908013B1 (en) Hydraulic system for a lowering operation that can be constantly controlled with a tilting valve with a lowering speed that is not limited by the tilting valve
EP0057355A2 (en) Hydraulic lifting device
EP1419910B1 (en) Hydropneumatic suspension
DE10224740B4 (en) Hydraulic control valve device with a flow control device
DE4240076A1 (en) Hydraulic control device for double work cylinder, esp steering appts. - controls both chambers of steering appts with proportional valve supplied by pressure source, and includes digital control circuit
DE4026849C2 (en) Valve arrangement for generating a control pressure in a hydraulic system
DE10151831A1 (en) Hydraulic system for an industrial truck has an additional connection valve linking the load pressure line to the transport line so that a storage brake can be activated without simultaneous movement of a hydraulic load
DE102017212197B3 (en) Quantity reduction device and hydraulic component
EP1215397B1 (en) Directional valve block
EP1253327A1 (en) Hydraulic control circuit
DE3019305C2 (en)

Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8364 No opposition during term of opposition
R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee