EP1749789B1 - Telescopic beam - Google Patents

Telescopic beam Download PDF

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Publication number
EP1749789B1
EP1749789B1 EP06014134A EP06014134A EP1749789B1 EP 1749789 B1 EP1749789 B1 EP 1749789B1 EP 06014134 A EP06014134 A EP 06014134A EP 06014134 A EP06014134 A EP 06014134A EP 1749789 B1 EP1749789 B1 EP 1749789B1
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EP
European Patent Office
Prior art keywords
sliding beam
sliding
hydraulic cylinder
hydraulic
retracted
Prior art date
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Active
Application number
EP06014134A
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German (de)
French (fr)
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EP1749789A1 (en
Inventor
Mikica Rafailovic
Alexander Patte
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Liebherr Werk Ehingen GmbH
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Liebherr Werk Ehingen GmbH
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Publication of EP1749789A1 publication Critical patent/EP1749789A1/en
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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
    • F15B11/16—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
    • F15B11/205—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members the position of the actuator controlling the fluid flow to the subsequent actuator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/72—Counterweights or supports for balancing lifting couples
    • B66C23/78—Supports, e.g. outriggers, for mobile cranes
    • B66C23/80—Supports, e.g. outriggers, for mobile cranes hydraulically actuated
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/085—Ground-engaging fitting for supporting the machines while working, e.g. outriggers, legs
    • 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
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/07—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors in distinct sequence
    • 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
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
    • F15B2211/7128—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators the chambers being connected in parallel
    • 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
    • F15B2211/78—Control of multiple output members
    • F15B2211/783—Sequential control

Definitions

  • the invention relates to a working machine with at least one telescopic sliding beam, according to the preamble of claim 1.
  • a working machine is made GB 967 277 known.
  • the first sliding beam is pushed out by means of a hydraulic cylinder between Schiebeholmkasten and Schiebeholm.
  • the extension of the second sliding beam is synchronous, as it is mechanically connected to the first sliding beam via a pulley system made of ropes or chains. Basically, by the mechanical connection of both sliding beams and the fixed length of the cables or chains a defined, reproducible at any time telescoping the sliding beams up to the respective load introduction points of all Ausfahrzuex possible.
  • FIG. 1 shows the basic structure of a corresponding telescoping sliding beam according to the prior art.
  • a Schiebeholmkasten 10 takes a first Schiebeholm 12 and a second sliding beam 14.
  • Schiebeholmkasten, first sliding beam and second Schiebeholm are each two simultaneously acted upon by hydraulic pressure hydraulic cylinders 16 and 18 or one here in the FIG. 1 or 2 two-stage hydraulic cylinder, not shown, connected together.
  • the cylinder is pressurized with hydraulic pressure, first the sliding beam with the least mechanical resistance is set in motion.
  • the resistance increases in the storage of the moving sliding beam.
  • the object of the invention is therefore to develop a generic machine with a telescoping sliding beam such that the sliding beam is reproducible austeleskopierbar or retractable, in particular, previously predetermined load introduction points are selectively approachable at reduced Ausfahrzupartyn.
  • a working machine is provided with a telescopic sliding beam with a Schiebeholmkasten and at least a first and a second Schiebeholm, which are telescopically telescoped, wherein the first sliding beam is mounted austeleskopierbar in Schiebeholmkasten.
  • the first sliding beam is first extensible to a desired point and then the second Schiebeholm, while the reverse retraction, the second Schiebeholm is first retractable to a desired point and then only the first Schiebeholm is retractable.
  • a print sequence control is realized by corresponding hydraulic valves which open when a preset limit pressure is reached.
  • the solution according to the invention is not limited to two sliding beams. According to this solution principle, more than two sliding beams could form the telescoping Schiebeholm.
  • hydraulic cylinders are provided for Austeleskopieren or retraction of the sliding beams.
  • a print sequence control for the hydraulic cylinder is provided.
  • first the first sliding beam in the first hydraulic cylinder is extended in a controlled manner, after which the second sliding beam is extended via a second hydraulic cylinder.
  • the second sliding beam is first retracted in a controlled manner via the second hydraulic cylinder, after which the first sliding beam is retracted via the first hydraulic cylinder.
  • the pressure sequence control can advantageously be realized by correspondingly provided in the hydraulic lines, which serve to supply the hydraulic cylinders, valves.
  • the telescoping sliding beams can be used particularly advantageously in working machines, preferably mobile cranes and excavators. Therefore, the present invention also relates to corresponding machines, preferably mobile cranes and excavators, with at least one, but advantageously four corresponding telescopic sliding beams.
  • the Figures 1 and 2 show a telescopic Schiebeholm 5 in the basic structure, as he was already known from the prior art.
  • the telescoping Schiebeholm 5 consists essentially of a fixed to the chassis of a vehicle crane not shown here Schiebeholmkasten 10, in which a first Schiebeholm 12 is slidably received in the longitudinal direction, wherein it is connected via the first hydraulic cylinder 16 with the Schiebeholmkasten.
  • a second sliding beam 14 is slidable in the longitudinal direction, mounted in the sliding beam 12 and connected via a second hydraulic cylinder 18 with the sliding beam 12.
  • a print sequencer that allows for an expel movement in accordance with the present invention is exemplified in U.S. Patent No. 5,376,866 FIG. 3 shown.
  • the cylinders 16 and 18 are shown schematically.
  • a first oil line 20 via which the hydraulic pressure for extending the telescoping sliding beam is provided, the hydraulic cylinder 16 is first extended to a desired extended state.
  • a hydraulic valve 22 which is arranged between the first hydraulic cylinder 16 and the second hydraulic cylinder 18, closed.
  • a controlled extension of the first hydraulic cylinder 16 and thus of the sliding beam 12 is effected. Together with the sliding beam 12 of course arranged in this sliding beam 14 is pushed out of the Schiebeholmkasten 10.
  • the cylinder 18 retracts and the sliding beam 14 is pulled into the sliding beam 12, as can be seen from the comparison of the upper and lower illustration of FIG. 6 easy to understand.
  • the relative movement between the Schiebeholm 12 and the Schiebeholmkasten 10 is zero, since the connection to the hydraulic cylinder 16 is still locked by the valve 26.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Jib Cranes (AREA)

Abstract

The telescopic sliding beam has a sliding beam case and at least first and second sliding beams that are arranged telescopically one inside the other, whereby the first beam can be deployed telescopically in the case. The first beam is deployed first to a desired point and then the second is deployed. When retracting the second beam is first retracted to a desired point then the first beam is retracted. An independent claim is also included for a working machine, preferably mobile crane or excavator, with an inventive device.

Description

Die Erfindung betrifft eine Arbeitsmaschine mit wenigstens einem teleskopierbaren Schiebeholm, gemäß dem Oberbegriff des Anspruchs 1. Eine solche Arbeitsmaschine ist aus GB 967 277 bekannt.The invention relates to a working machine with at least one telescopic sliding beam, according to the preamble of claim 1. Such a working machine is made GB 967 277 known.

Gerade im Bereich der Autokrane oder auch Bagger gibt es eine Vielfalt an hydraulischen Abstützungsmöglichkeiten, die zur Verbesserung der Tragfähigkeit und Standsicherheit dienen. Hier sind beispielsweise einfache teleskopierbare Schiebeholme, doppelt teleskopierbare Schiebeholme, Klappholme oder auch Kombinationen von Klappholmen und Schiebeholmen bekannt.Especially in the field of mobile cranes or excavators, there are a variety of hydraulic support options, which serve to improve the carrying capacity and stability. Here, for example, simple telescopic sliding beams, double telescopic sliding beams, folding arms or combinations of folding beams and sliding beams are known.

Für den sicheren Arbeitsbetrieb sind je nach den örtlichen Gegebenheiten in Abhängigkeit der erforderlichen Tragfähigkeit unterschiedliche Ausfahrzustände der seitlich vom Fahrgestell abgehenden Schiebeholme erforderlich, bei denen die Lasteinleitung in die Schiebeholme aus statischen Gründen über definierte Lasteinleitungsstellen erfolgen muss. Die Lasteinleitungsstellen müssen in allen Ausfahrzuständen jederzeit reproduzierbar angefahren werden können.Depending on the local conditions, depending on the required load capacity, different states of extension of the sliding beams extending laterally from the chassis are required for safe working operation, in which case the load introduction into the sliding beams must be effected via defined load introduction points for static reasons. The load introduction points must be able to be approached at any time reproducibly in all Ausfahrzuständen.

Es ist bereits bekannt, doppelt teleskopierbare Schiebeholme vorzusehen, wobei die Systeme beim Austeleskopieren bzw. Wiedereinfahren der Schiebeholme unterschiedlich aufgebaut sein können. Hier können beispielsweise vorgesehene Hydraulikzylinder und Seilausschubsysteme miteinander kombiniert sein. Anstelle dieser Systeme sind auch Hydraulikzylinder mit Kettenausschub bereits eingesetzt worden. Eine Alternative besteht darin, zwei Hydraulikzylinder, jeweils einen für jeden Schiebeholm, einzusetzen oder aber auch einen einzigen Zweistufenzylinder zu verwenden.It is already known to provide double-telescopic sliding beams, the systems can be constructed differently when Austeleskopieren or re-entry of the sliding beams. Here, for example, provided hydraulic cylinder and Seilausschubsysteme be combined with each other. Instead of these systems, hydraulic cylinders with chain shifter have already been used. An alternative is to use two hydraulic cylinders, one for each sliding beam, or to use a single two-stage cylinder.

Beim bekannten Ausschubsystem mit einem Hydraulikzylinder und einem Seil- bzw. Kettenausschub erfolgt der Teleskopiervorgang der Schiebeholme wie folgt:In the known Ausschubsystem with a hydraulic cylinder and a rope or chain extension telescoping of the sliding beams is carried out as follows:

Zunächst wird der erste Schiebeholm mittels eines hydraulischen Zylinders zwischen Schiebeholmkasten und Schiebeholm ausgeschoben. Der Ausschub vom zweiten Schiebeholm erfolgt synchron, da dieser mechanisch mit dem ersten Schiebeholm über ein Flaschenzugsystem aus Seilen bzw. Ketten verbunden ist. Grundsätzlich ist durch die mechanische Verbindung von beiden Schiebeholmen und die fixe Länge der Seile bzw. Ketten ein definiertes, jeder Zeit reproduzierbares Teleskopieren der Schiebeholme bis zu den jeweiligen Lasteinleitungsstellen aller Ausfahrzustände möglich.First, the first sliding beam is pushed out by means of a hydraulic cylinder between Schiebeholmkasten and Schiebeholm. The extension of the second sliding beam is synchronous, as it is mechanically connected to the first sliding beam via a pulley system made of ropes or chains. Basically, by the mechanical connection of both sliding beams and the fixed length of the cables or chains a defined, reproducible at any time telescoping the sliding beams up to the respective load introduction points of all Ausfahrzustände possible.

Aus der DE 22 60 815 ist eine Folgesteuerung für ein mehrstufiges teleskopierbares Auslegersystem bekannt. Die folgegesteuerten Druckzylinder werden derart gesteuert, so dass die folgende Zylinderkolbenstange erst ausfahren kann, wenn die vorhergehende ausgefahren ist, und dass die vorhergehende erst einfahren kann, wenn die folgende eingefahren ist.From the DE 22 60 815 a sequencer for a multi-stage telescopic boom system is known. The following controlled pressure cylinders are controlled so that the following cylinder piston rod can only extend when the previous is extended, and that the previous can retract only when the following is retracted.

Bei einem Ausschubsystem mit zwei Hydraulikzylindern oder einem Zweistufenzylinder erfolgt der Teleskopiervorgang der Schiebeholme wie folgt:In a Ausschubsystem with two hydraulic cylinders or a two-stage cylinder telescoping of the sliding beams is carried out as follows:

Hierzu kann auf die Figur 1 verwiesen werden, die den prinzipiellen Aufbau eines entsprechenden teleskopierbaren Schiebeholms nach dem Stand der Technik zeigt. Ein Schiebeholmkasten 10 nimmt einen ersten Schiebeholm 12 und einen zweiten Schiebeholm 14 auf. Schiebeholmkasten, erster Schiebeholm und zweiter Schiebeholm sind jeweils über zwei gleichzeitig mit hydraulischem Druck beaufschlagte Hydraulikzylinder 16 und 18 oder einen hier in der Figur 1 bzw. 2 nicht dargestellten Zweistufen-Hydraulikzylinder miteinander verbunden. Bei Beaufschlagen der Zylinder mit hydraulischem Druck setzt sich zunächst der Schiebeholm mit dem geringsten mechanischen Widerstand in Bewegung. Während des Teleskopiervorgangs erhöht sich der Widerstand in der Lagerung des sich bewegenden Schiebeholms. Übersteigt der mechanische Widerstand des sich bewegenden Schiebeholms den des noch stehenden Schiebeholms, stoppt dieser und der bis dahin stehende Schiebeholm setzt sich in Bewegung. Dieser Bewegungswechsel wird zwischen den beiden Schiebeholmen während eines Teleskopiervorganges mehrfach willkürlich ausgeführt. Durch die sich ändernden mechanischen Widerstände in der Lagerung der Schiebeholme und dem dementsprechenden lastabhängigen Teleskopieren der Schiebeholme kann bei reduzierten Ausfahrzuständen kein definiertes Teleskopieren der Schiebeholme bis zu den jeweiligen Lasteinleitungsstellen erfolgen.This can be done on the FIG. 1 which shows the basic structure of a corresponding telescoping sliding beam according to the prior art. A Schiebeholmkasten 10 takes a first Schiebeholm 12 and a second sliding beam 14. Schiebeholmkasten, first sliding beam and second Schiebeholm are each two simultaneously acted upon by hydraulic pressure hydraulic cylinders 16 and 18 or one here in the FIG. 1 or 2 two-stage hydraulic cylinder, not shown, connected together. When the cylinder is pressurized with hydraulic pressure, first the sliding beam with the least mechanical resistance is set in motion. During the telescoping process, the resistance increases in the storage of the moving sliding beam. If the mechanical resistance of the moving sliding beam exceeds that of the still standing sliding beam, it stops and the sliding beam, which has been up to then, begins to move. This change of motion is repeatedly performed arbitrarily between the two sliding beams during a Teleskopiervorganges. Due to the changing mechanical resistance in the storage of the sliding beams and the corresponding load-dependent telescoping of the sliding beams can be done at reduced Ausfahrzuständen no defined telescoping the sliding beams up to the respective load introduction points.

Aufgabe der Erfindung ist es daher, eine gattungsgemäße Arbeitsmaschine mit einem teleskopierbaren Schiebeholm derart weiterzubilden, dass der Schiebeholm reproduzierbar austeleskopierbar bzw. wieder einfahrbar ist, wobei insbesondere vorher festgelegte Lasteinleitungsstellen bei reduzierten Ausfahrzuständen gezielt anfahrbar sind.The object of the invention is therefore to develop a generic machine with a telescoping sliding beam such that the sliding beam is reproducible austeleskopierbar or retractable, in particular, previously predetermined load introduction points are selectively approachable at reduced Ausfahrzuständen.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruchs 1 gelöst. Demnach ist eine Arbeitsmaschine mit einem teleskopierbaren Schiebeholm mit einem Schiebeholmkasten und mindestens einem ersten und einem zweiten Schiebeholm vorgesehen, die ineinander teleskopierbar sind, wobei der erste Schiebeholm im Schiebeholmkasten austeleskopierbar gelagert ist. Erfindungsgemäß ist zunächst der erste Schiebeholm bis zu einem gewünschten Punkt und dann der zweite Schiebeholm austeleskopierbar, während beim umgekehrten Einfahren zunächst der zweite Schiebeholm bis zu einem gewünschten Punkt einfahrbar ist und anschließend erst der erste Schiebeholm einfahrbar ist. Weiterhin erfindungsgemäß ist eine Druckfolgesteuerung durch entsprechende Hydraulikventile realisiert, die bei Erreichen eines voreingestellten Grenzdrucks öffnen. Die erfindungsgemäße Lösung ist dabei nicht auf zwei Schiebeholme beschränkt. Nach diesem Lösungsprinzip könnten auch mehr als zwei Schiebeholme den teleskopierbaren Schiebeholm bilden.According to the invention, this object is solved by the features of claim 1. Accordingly, a working machine is provided with a telescopic sliding beam with a Schiebeholmkasten and at least a first and a second Schiebeholm, which are telescopically telescoped, wherein the first sliding beam is mounted austeleskopierbar in Schiebeholmkasten. According to the invention, the first sliding beam is first extensible to a desired point and then the second Schiebeholm, while the reverse retraction, the second Schiebeholm is first retractable to a desired point and then only the first Schiebeholm is retractable. Furthermore, according to the invention, a print sequence control is realized by corresponding hydraulic valves which open when a preset limit pressure is reached. The solution according to the invention is not limited to two sliding beams. According to this solution principle, more than two sliding beams could form the telescoping Schiebeholm.

Bevorzugte Ausgestaltungen der Erfindung ergeben sich aus den sich an den Hauptanspruch anschließenden Unteransprüchen.Preferred embodiments of the invention will become apparent from the subsequent claims to the main claim.

Demnach sind zum Austeleskopieren bzw. Einziehen der Schiebeholme Hydraulikzylinder vorgesehen.Accordingly, hydraulic cylinders are provided for Austeleskopieren or retraction of the sliding beams.

Besonders vorteilhaft ist eine Druckfolgesteuerung für die Hydraulikzylinder vorgesehen. Mittels dieser wird zunächst der erste Schiebeholm im ersten Hydraulikzylinder kontrolliert ausgefahren, wobei danach der zweite Schiebeholm über einen zweiten Hydraulikzylinder ausgefahren wird. Beim Einfahren wiederum wird zunächst der zweite Schiebeholm über den zweiten Hydraulikzylinder kontrolliert eingefahren, wonach der erste Schiebeholm über den ersten Hydraulikzylinder eingefahren wird.Particularly advantageous is a print sequence control for the hydraulic cylinder is provided. By means of this, first the first sliding beam in the first hydraulic cylinder is extended in a controlled manner, after which the second sliding beam is extended via a second hydraulic cylinder. When retracting, in turn, the second sliding beam is first retracted in a controlled manner via the second hydraulic cylinder, after which the first sliding beam is retracted via the first hydraulic cylinder.

Die Druckfolgesteuerung kann vorteilhaft durch entsprechend in den Hydraulikleitungen, die zur Versorgung der Hydraulikzylinder dienen, versehene Ventile realisiert werden.The pressure sequence control can advantageously be realized by correspondingly provided in the hydraulic lines, which serve to supply the hydraulic cylinders, valves.

Besonders vorteilhaft lassen sich die teleskopierbaren Schiebeholme in Arbeitsmaschinen, vorzugsweise Fahrzeugkranen und Baggern, einsetzen. Daher betrifft die vorliegende Erfindung auch entsprechende Arbeitsmaschinen, vorzugsweise Fahrzeugkrane und Bagger, mit mindestens einem, vorteilhaft aber vier entsprechenden teleskopierbaren Schiebeholmen.The telescoping sliding beams can be used particularly advantageously in working machines, preferably mobile cranes and excavators. Therefore, the present invention also relates to corresponding machines, preferably mobile cranes and excavators, with at least one, but advantageously four corresponding telescopic sliding beams.

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus den sich in den Zeichnungen dargestellten Ausführungsbeispielen. Es zeigen:

Figur 1:
eine perspektivische Darstellung eines teleskopierbaren Schiebeholms nach dem Stand der Technik,
Figur 2:
eine Darstellung gemäß Figur 1, jedoch geschnitten,
Figur 3:
ein Hydraulikkreis, mit dem eine Druck-Folgesteuerung realisiert ist;
Figuren 4 - 7:
teleskopierbare Schiebeholme nach der vorliegenden Erfindung in unterschiedlichen Ausfahrzuständen.
Further features, details and advantages of the invention will become apparent from the embodiments illustrated in the drawings. Show it:
FIG. 1:
a perspective view of a telescoping sliding beam according to the prior art,
FIG. 2:
a representation according to FIG. 1 , but cut,
FIG. 3:
a hydraulic circuit with which a pressure following control is realized;
Figures 4 - 7:
telescopic sliding beams according to the present invention in different states of extension.

Die Figuren 1 und 2 zeigen einen teleskopierbaren Schiebeholm 5 im prinzipiellen Aufbau, wie er schon aus dem Stand der Technik bekannt war. Der teleskopierbare Schiebeholm 5 besteht im wesentlichen aus einem fest mit dem Fahrgestell eines hier nicht näher dargestellten Fahrzeugkrans verbundenen Schiebeholmkasten 10, in welchem ein erster Schiebeholm 12 in Längsrichtung verschiebbar aufgenommen ist, wobei er über den ersten Hydraulikzylinder 16 mit dem Schiebeholmkasten verbunden ist. Ein zweiter Schiebeholm 14 ist, in Längsrichtung verschiebbar, im Schiebeholm 12 gelagert und über einen zweiten Hydraulikzylinder 18 mit dem Schiebeholm 12 verbunden.The Figures 1 and 2 show a telescopic Schiebeholm 5 in the basic structure, as he was already known from the prior art. The telescoping Schiebeholm 5 consists essentially of a fixed to the chassis of a vehicle crane not shown here Schiebeholmkasten 10, in which a first Schiebeholm 12 is slidably received in the longitudinal direction, wherein it is connected via the first hydraulic cylinder 16 with the Schiebeholmkasten. A second sliding beam 14 is slidable in the longitudinal direction, mounted in the sliding beam 12 and connected via a second hydraulic cylinder 18 with the sliding beam 12.

Gemäß der vorliegenden Erfindung sind nun die Ölanschlüsse der Hydraulikzylinder über eine Druck-Folgesteuerung, die entweder in die Hydraulikzylinder (in den Figuren1 und 2 nicht dargestellt) integriert oder extern in einem separaten Steuerblock (auch in den Figuren 1 und 2 nicht dargestellt) ausgeführt ist, miteinander verbunden. Dabei ist die Reihenfolge, in der die Hydraulikzylinder aus- bzw. einfahrbar sind, durch entsprechende konstruktive Maßnahmen und aufgrund der Belegung der entsprechenden Ölanschlüsse frei wählbar.According to the present invention, now the oil connections of the hydraulic cylinders via a pressure sequence control, either in the hydraulic cylinder (in the Figures 1 and 2 not shown) integrated or externally in a separate control block (also in the Figures 1 and 2 not shown) is executed, connected to each other. The order in which the hydraulic cylinders are extended or retracted, by appropriate design measures and due to the occupancy of the corresponding oil connections freely selectable.

Eine Druckfolgesteuerung, die eine Austeleskopier- bzw. Einfahrbewegung gemäß der vorliegenden Erfindung ermöglicht, ist beispielhaft in der Figur 3 gezeigt. Dort sind die Zylinder 16 und 18 schematisch dargestellt. Über eine erste Ölleitung 20, über die der Hydraulikdruck zum Ausfahren des teleskopierbaren Schiebeholms zur Verfügung gestellt wird, wird der Hydraulikzylinder 16 zunächst bis zu einem gewünschten Ausfahrzustand ausgefahren. In dieser Zeit ist ein Hydraulikventil 22, welches zwischen dem ersten Hydraulikzylinder 16 und dem zweiten Hydraulikzylinder 18 angeordnet ist, geschlossen. Hierdurch wird ein kontrolliertes Ausfahren des ersten Hydraulikzylinders 16 und damit des Schiebeholms 12 bewirkt. Zusammen mit dem Schiebeholm 12 wird selbstverständlich der in diesem angeordnete Schiebeholm 14 aus dem Schiebeholmkasten 10 geschoben. Die Relativbewegung zwischen dem Schiebeholm 12 und dem Schiebeholm 14 beträgt in diesem Ausfahrzustand null, da die Verbindung zum Hydraulikzylinder 18 durch das Ventil 22 gesperrt ist. Diese Ausfahrbewegung ist in Figur 4 dargestellt, in welcher die eingezogene Position des teleskopierbaren Schiebeholms sowie die ausgefahrene Position des Schiebeholms 12 dargestellt ist.A print sequencer that allows for an expel movement in accordance with the present invention is exemplified in U.S. Patent No. 5,376,866 FIG. 3 shown. There, the cylinders 16 and 18 are shown schematically. Via a first oil line 20, via which the hydraulic pressure for extending the telescoping sliding beam is provided, the hydraulic cylinder 16 is first extended to a desired extended state. In this time, a hydraulic valve 22, which is arranged between the first hydraulic cylinder 16 and the second hydraulic cylinder 18, closed. As a result, a controlled extension of the first hydraulic cylinder 16 and thus of the sliding beam 12 is effected. Together with the sliding beam 12 of course arranged in this sliding beam 14 is pushed out of the Schiebeholmkasten 10. The relative movement between the sliding beam 12 and the sliding beam 14 is zero in this extended state, since the connection to the hydraulic cylinder 18 is blocked by the valve 22. This extension movement is in FIG. 4 shown, in which the retracted position of the telescoping sliding beam and the extended position of the sliding beam 12 is shown.

Sobald der Hydraulikzylinder 16 seine Endlage erreicht hat, steigt der hydraulische Systemdruck an. Wird ein am Ventil 22 voreingestellter Grenzdruck erreicht, öffnet dieses Ventil. Der Hydraulikzylinder 18 wird anschließend mit Hydrauliköl versorgt und fährt aus. Hierdurch wird der Schiebeholm 14 aus dem Schiebeholm 12 geschoben. Hier beträgt nun die Relativbewegung zwischen Schiebeholm 12 und Schiebeholmkasten 10 null, da der Hydraulikzylinder 16 bereits voll ausgefahren ist. Diese Situation ist in der Figur 5 gezeigt, wobei in der oberen Darstellung die Ausgangsposition vor dem Austeleskopieren des zweiten Schiebeholms 14 und im unteren Bild dann die Situation bei vollständig ausgeschobenen Schiebeholmen 14 dargestellt ist.As soon as the hydraulic cylinder 16 has reached its end position, the hydraulic system pressure increases. If a preset limit value is reached at valve 22, this valve opens. The hydraulic cylinder 18 is then supplied with hydraulic oil and drives out. As a result, the sliding beam 14 is pushed out of the sliding beam 12. Here, the relative movement between the sliding beam 12 and sliding beam box 10 is now zero, since the hydraulic cylinder 16 is already fully extended. This situation is in the FIG. 5 shown, wherein in the upper illustration, the starting position before the Austeleskopieren the second sliding beam 14 and in the lower picture then the situation is shown with fully pushed sliding beams 14.

Beim Einfahren wird nun zunächst der Hydraulikzylinder 18 über die Hydraulikleitung 24 beaufschlagt, wobei hier die Verbindung zum Zylinder 16 durch ein Ventil 26 (vgl. Figur 3) gesperrt wird.When retracting the hydraulic cylinder 18 is now first acted upon by the hydraulic line 24, in which case the connection to the cylinder 16 through a valve 26 (see. FIG. 3 ) is locked.

Der Zylinder 18 fährt ein und der Schiebeholm 14 wird in den Schiebeholm 12 gezogen, wie sich aus dem Vergleich der oberen und unteren Darstellung der Figur 6 leicht nachvollziehen lässt. Die Relativbewegung zwischen dem Schiebeholm 12 und dem Schiebeholmkasten 10 beträgt null, da die Verbindung zu dem Hydraulikzylinder 16 immer noch durch das Ventil 26 gesperrt ist.The cylinder 18 retracts and the sliding beam 14 is pulled into the sliding beam 12, as can be seen from the comparison of the upper and lower illustration of FIG. 6 easy to understand. The relative movement between the Schiebeholm 12 and the Schiebeholmkasten 10 is zero, since the connection to the hydraulic cylinder 16 is still locked by the valve 26.

Anschließend erfolgt ein kontrolliertes Einfahren des Hydraulikzylinders 16, wobei die Schiebeholme 12 und 14 in den Schiebeholmkasten 10 eingefahren werden. Dies wird dadurch erreicht, dass nach Erreichen der Endlage des Hydraulikzylinders 18 der hydraulische Systemdruck ansteigt. Wird nun ein am Ventil 26 voreingestellter Druck erreicht, öffnet dieses Ventil. Darauf hin wird der Zylinder 16 mit Öl versorgt und fährt ein. Durch diese Einfahrbewegung des Hydraulikzylinders wird der Schiebeholm 12 gemeinsam mit dem Schiebeholm 14 in den Schiebeholmkasten 10 gezogen. Die Relativbewegung zwischen dem Schiebeholm 12 und dem Schiebeholm 14 beträgt null, da der Zylinder 18 bereits voll eingefahren ist.Subsequently, a controlled retraction of the hydraulic cylinder 16, wherein the sliding beams 12 and 14 are retracted into the Schiebeholmkasten 10. This is achieved in that after reaching the end position of the hydraulic cylinder 18, the hydraulic system pressure increases. If now a preset pressure on the valve 26 is reached, this valve opens. Then the cylinder 16 with oil supplies and drives. As a result of this retraction movement of the hydraulic cylinder, the sliding beam 12 is pulled together with the sliding beam 14 into the sliding beam box 10. The relative movement between the sliding beam 12 and the sliding beam 14 is zero, since the cylinder 18 is already fully retracted.

Claims (3)

  1. A work machine, in particular a mobile crane or an excavator, having at least one telescopic sliding beam to support the work machine, wherein the sliding beam has a sliding beam box and at least one first sliding beam and one second sliding beam which can be hydraulically telescoped into one another and the first sliding beam is supported in the sliding beam box extendable in the manner of a telescope,
    characterised in that
    the first sliding beam can first be telescopically extended first and, after its telescopic extension up to a desired point, the second sliding beam can be telescopically extended, whereas on the reverse retraction, first the second sliding beam can be retracted up to a desired point and in that subsequently the first sliding beam can be retracted and in that a pressure sequence control is realised by corresponding hydraulic valves, wherein the hydraulic valves open on reaching a preset limit pressure.
  2. A work machine in accordance with claim 1, characterised in that hydraulic cylinders are provided for telescopically extending or retracting the sliding beams.
  3. A work machine in accordance with claim 2, characterised by a pressure sequence control for the hydraulic cylinders by means of which the first sliding beam can first be extended in a controlled manner via the first hydraulic cylinder, wherein then the second sliding beam can be extended via a second hydraulic cylinder, whereas on the retraction, the second sliding beam can first be retracted in a controlled manner via the second hydraulic cylinder, after which the first sliding beam can be retracted via the first hydraulic cylinder.
EP06014134A 2005-08-01 2006-07-07 Telescopic beam Active EP1749789B1 (en)

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DE202005012049U DE202005012049U1 (en) 2005-08-01 2005-08-01 Telescopic sliding beam

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CN101937159B (en) * 2010-08-27 2012-07-25 刘洪� Power-assisted manual telescopic rocker arm
DE102012008864A1 (en) 2011-10-18 2013-04-18 Pacoma Gmbh Modular support system i.e. hydraulically operated supporting system, for e.g. special-purpose vehicle, has cylinders whose end faces are connected together in L-shape by holding system that transfers moments and forces to vehicle frame
DE102012022030A1 (en) * 2012-11-12 2014-05-15 Deere & Company Suspension device for a movably mounted vehicle axle
DE102013001474B4 (en) 2013-01-29 2023-05-17 Liebherr-Werk Ehingen Gmbh Telescopic sliding beam device and method of using it
DE102016002980B4 (en) * 2016-03-10 2024-03-28 Liebherr-Werk Ehingen Gmbh Three-part sliding bar
DE102016104653A1 (en) * 2016-03-14 2017-09-14 Schwing Gmbh Double telescopic arch support
DE102017003730B4 (en) * 2017-04-18 2020-08-20 Liebherr-Werk Ehingen Gmbh Vehicle frame for a mobile crane and mobile crane
DK3650394T3 (en) * 2018-11-06 2021-08-30 Hiab Ab HOLDING DEVICE FOR LOAD HANDLING EQUIPMENT AND HYDRAULIC CRANE WHICH INCLUDES SUCH HOLDING DEVICE
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Publication number Publication date
US7703616B2 (en) 2010-04-27
US20070175850A1 (en) 2007-08-02
ATE530491T1 (en) 2011-11-15
DE202005012049U1 (en) 2006-12-14
EP1749789A1 (en) 2007-02-07

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