EP3417951B1 - Device and method for generating impact impulses or vibration of a construction machine - Google Patents

Device and method for generating impact impulses or vibration of a construction machine Download PDF

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Publication number
EP3417951B1
EP3417951B1 EP17176586.0A EP17176586A EP3417951B1 EP 3417951 B1 EP3417951 B1 EP 3417951B1 EP 17176586 A EP17176586 A EP 17176586A EP 3417951 B1 EP3417951 B1 EP 3417951B1
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EP
European Patent Office
Prior art keywords
piston
reversal point
working space
control unit
pressure fluid
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.)
Active
Application number
EP17176586.0A
Other languages
German (de)
French (fr)
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EP3417951A1 (en
Inventor
Markus MERZHÄUSER
Tobias Moscaritolo
Henrik Uelhoff
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.)
Eurodrill GmbH
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Eurodrill GmbH
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
Priority to ES17176586T priority Critical patent/ES2922006T3/en
Application filed by Eurodrill GmbH filed Critical Eurodrill GmbH
Priority to EP17176586.0A priority patent/EP3417951B1/en
Priority to PT171765860T priority patent/PT3417951T/en
Priority to DK17176586.0T priority patent/DK3417951T3/en
Priority to CA3005244A priority patent/CA3005244C/en
Priority to US15/984,043 priority patent/US10730075B2/en
Priority to KR1020180069600A priority patent/KR102090038B1/en
Priority to JP2018115130A priority patent/JP6676104B2/en
Priority to CN201810628094.5A priority patent/CN109127346B/en
Publication of EP3417951A1 publication Critical patent/EP3417951A1/en
Application granted granted Critical
Publication of EP3417951B1 publication Critical patent/EP3417951B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/18—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid
    • B06B1/183—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid operating with reciprocating masses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/18—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/02—Placing by driving
    • E02D7/06—Power-driven drivers
    • E02D7/10—Power-driven drivers with pressure-actuated hammer, i.e. the pressure fluid acting directly on the hammer structure
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/18—Placing by vibrating
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B1/00—Percussion drilling
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B1/00—Percussion drilling
    • E21B1/02—Surface drives for drop hammers or percussion drilling, e.g. with a cable
    • E21B1/04—Devices for reversing the movement of the rod or cable at the surface
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B1/00—Percussion drilling
    • E21B1/12—Percussion drilling with a reciprocating impulse member
    • E21B1/24—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure
    • E21B1/26—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by liquid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
    • B06B2201/40—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups with testing, calibrating, safety devices, built-in protection, construction details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
    • B06B2201/70—Specific application
    • B06B2201/73—Drilling

Definitions

  • the invention relates to a device for generating impact pulses or vibrations for a construction machine, having a housing, a piston which can be moved back and forth in a working chamber in the housing in a reversing manner between a first reversal point and a second reversal point, and a pressurized fluid supply through which in the region of the first reversal point and the second reversal point, pressure fluid can be introduced into and discharged from the working chamber, the piston being able to be set into the reversing movement to generate the impact pulses or the vibrations, according to the preamble of claim 1.
  • the invention further relates to a method for generating impact impulses or vibrations for a construction machine, in which a piston in a working chamber in a housing is reversibly moved back and forth between a first reversal point and a second reversal point, with the impact impulses or vibrations being generated by the piston is set in reversing motion by means of a pressure fluid and the pressure fluid is fed into and out of the working chamber in the area of the first reversal point and the second reversal point, according to the preamble of claim 10.
  • a vibrator is from the EP 1 728 564 B1 known.
  • the working space in the housing is divided into two pressure chambers by a working piston.
  • the two pressure chambers are targeted with a pressurized fluid via an inlet and an outlet alternately supplied or disposed of, so that the working piston moves reversing and generates an oscillation.
  • the time-coordinated supply and disposal of pressure fluid in the individual pressure chambers takes place via a complex channel arrangement in the working piston.
  • a control piston is also slidably mounted within the working piston, which can change its position relative to the working piston in a targeted manner by means of stops protruding on the end faces of the housing in order to open or block certain channels.
  • the supply and disposal of pressurized fluid is thus achieved by mechanical measures, with the pressurized fluid supply and disposal being switched over when certain switchover points are reached through the predetermined channels.
  • Comparable mechanical control devices for vibrators go, for example, from the GB-A-920,158 , US-A-4,026,193 or the US-A-4,031,812 out. All of these known devices have a working piston and a control piston, which open or close certain channels depending on the respective position in the housing, causing a targeted alternating supply of the two opposite pressure chambers for moving the working piston.
  • a generic device is from JP H11 158860 A out.
  • the movement of a piston is recorded with a displacement sensor, which includes a rod-shaped measuring component on the working piston.
  • the rod-shaped measuring component is slidably mounted in a cylindrical sleeve.
  • a solenoid valve for supplying pressurized fluid for reversing movement of the working piston is controlled.
  • Another vibrator is from the DE 30 38 835 A1 known.
  • a position of the working piston is determined via a laterally arranged position sensor device.
  • the recorded position data are used for the controlled supply of the pressure fluid to generate a reversing movement of the working piston.
  • the EP 0 449 586 A1 discloses a pile driver with an electro-hydraulic servo valve.
  • a control current causes a displacement of a hydraulic control piston, by means of which the pressure fluid for moving a working piston is controlled.
  • a displacement sensor is attached to the outside of the housing for position detection.
  • the invention is based on the object of specifying a device and a method for generating impact impulses or vibrations with which increased flexibility in setting and changing the impact or vibration behavior can be achieved with a simple and robust construction of the device.
  • a measuring device is provided for determining a position of the piston in the working chamber, that at least one controllable valve is provided, through which the pressure fluid can be fed into and/or discharged from the working chamber, and that a control unit is provided which is connected to the measuring device and the at least one controllable valve, the movement of the piston in the working chamber being able to be controlled and changed by the control unit.
  • a basic idea of the invention is to move away from the previously complex mechanical control of the piston in the working chamber and to provide an electrical or electronic control unit for this purpose.
  • at least one measuring device is provided for determining the position of the piston in the working space.
  • the measuring device can emit signals relating to position data of the piston continuously or at predetermined short time intervals. These signals or data are received by the control unit and processed depending on a predetermined control logic, with control signals or control data being generated for one or more controllable valves.
  • pressurized fluid can be fed into and discharged from the working space in a targeted manner.
  • the movement behavior of the piston in the housing can now be controlled and also changed in a particularly simple manner by changing or adapting the corresponding control logic in the control unit. In this way, the stroke and/or the frequency of the reversing movement of the piston can be controlled and changed relatively easily.
  • valves can be used for the device according to the invention.
  • the valve it is particularly expedient for the valve to be an electromagnetic valve.
  • the valve body can be adjusted between an open and a closed position by an electromagnetic arrangement. Intermediate positions can also be set here, so that the quantity of pressurized fluid fed into the working space is adjusted leaves.
  • any pressure fluid can be provided, hydraulic oil preferably being used.
  • the measuring device has a linear sensor. This is particularly useful when the piston in the housing is moved linearly between the two reversal points.
  • the measuring device has an elongate first measuring component which extends into the working space and into a free space in the piston.
  • the measuring component is not arranged behind a wall of the housing, but directly in the working space in which the piston moves.
  • the elongate first measurement component protrudes into a corresponding free space in the piston, with the piston preferably sliding along the first measurement component without contact.
  • a second measuring component a magnet
  • the two measuring components interact in such a way that a very precise determination of the position of the second measuring component and thus of the piston relative to the first measuring component and thus relative to the working space and the housing can be determined.
  • the first measuring component can have a coil in which the magnet induces a current of, for example, 4 to 20 mA as a measure of the position of the piston.
  • the piston can be moved reversingly in the housing in such a way that the piston does not touch the housing wall with its two end faces.
  • the device can be used as a so-called vibrator.
  • An advantageous embodiment of the invention consists in that an impact surface is arranged at at least one reversal point, on which the piston strikes in a targeted manner to generate an impact pulse.
  • an impact surface can be arranged on the two opposite end faces of the piston on the housing. However, only a single striking surface is preferred, so that targeted impact impulses can be generated, such as are desired for percussion drilling.
  • a frequency and/or a stroke of the piston can be set and adjusted by the control unit.
  • the control unit preferably has an input interface, for example an input field.
  • the control unit can also be actuated directly by an operator using a conventional machine control system from an operating unit.
  • control unit has a program memory in which various control programs for controlling the piston can be stored.
  • various control programs for controlling the piston can be stored.
  • special control programs can be stored for specific purposes. For example, at the beginning of a program, a high frequency with a small piston stroke can be provided, while the piston stroke then increases over time in the course of the program and a frequency decreases.
  • Almost any number of different program sequences can be provided for controlling the piston in terms of frequency and stroke.
  • a program for rapid propulsion or particularly gentle driving can be provided.
  • Programs for special soil types can also be stored.
  • the invention includes a construction machine, which is characterized in that the above-described device is arranged to generate impact impulses or vibrations.
  • the construction machine can be provided for civil engineering.
  • the construction machine it is particularly advantageous for the construction machine to be an earth boring device. If the device for generating percussion pulses is provided, percussion drilling can be carried out. This is particularly advantageous when penetrating harder layers of rock. Alternatively or additionally, the device can also be designed without impact contacts for generating vibrations. So-called overburden drilling can be carried out in particular in the case of an earth drilling device with a rotationally driven drilling tool. The rotary movement of the drilling tool is superimposed by a vibration or oscillation movement. By means of superimposed vibrations, a quasi liquefaction of the soil can be achieved, at least in the contact area with the drilling tool, which leads to improved drilling progress.
  • Rams or vibrators of this type can be used, for example, for installing steel girders, piles or sheet piling, which are driven into the ground by impact impulses or by vibrations.
  • the method according to the invention is characterized in that the position of the piston is detected with a measuring device and that a control unit, depending on the detected position of the piston, controls at least one controllable valve through which pressurized fluid is fed into and/or discharged from the working chamber, with the control unit controls the movement of the piston.
  • a device 10 which is designed to generate impact pulses.
  • the device 10 has a housing 12 with a cylindrical working chamber 14 in which an approximately cylindrical piston 20 is mounted so as to be linearly movable reversing between two reversal points.
  • the piston 20 is mounted in the housing 12 in a fluid-tight manner and, as shown in the exemplary embodiment, can protrude from the housing 12 with one side.
  • the piston 20 hits a corresponding impact surface 18, which can be, for example, a shank of a drilling drive shaft.
  • a first opening 15 for a first supply line 31 of a pressurized fluid supply 30 is provided on the housing 12 in the area of the upper first reversal point.
  • the working chamber 14 is connected to a second supply line 32 of the pressurized fluid supply 30 through a second opening 16 .
  • the two openings 15, 16 are alternately connected to a hydraulic pressure source P and an unpressurized disposal tank T via a controllable valve 36, which is designed as a 2/4-way valve in the exemplary embodiment shown.
  • a controllable valve 36 which is designed as a 2/4-way valve in the exemplary embodiment shown.
  • a measuring device 40 with a first elongate measuring component 42 is provided on the housing 12 .
  • the first measuring component 42 is rod-like and extends into the working chamber 14 and into a correspondingly arranged free space 22 in the piston 20.
  • a ring-shaped magnet is arranged in a lower area of the free space 22 as a second measuring component 44.
  • the second sensing component 44 is fixedly connected to the moveable piston 20 while the elongate first sensing component 42 is fixedly attached to the housing 12 .
  • the measuring device 40 is embodied as an inductive linear sensor, which exactly determines the position of the second measuring component 44 and thus of the piston 20 in relation to the elongated first measuring component 42 and thus the position of the piston 20 in the working chamber 14 .
  • the measuring device 40 is connected to a control unit 50 via a line connection 52, analog signals or digital data relating to the current position of the piston 20 in the working chamber 14 being transmitted.
  • the controllable valve 36 is activated via electromagnetic elements 37, so that the first supply line 31 is connected to the unpressurized tank T and the second supply line 32 is connected to the pressure source P, as in the drawing is shown.
  • the pressure source P can then be connected to the first supply line 31, while the tank T is connected to the second supply line 32.
  • the lower area of the working chamber 14 is then emptied of pressurized fluid, while at the same time an upper area of the working chamber 14 is filled with pressurized fluid, with the piston 20 then moving down from the upper first reversal point to the lower second reversal point. If the measuring device 14 determines that a triggering point of the piston 20 in the housing 12 has been reached, the valve 36 can then be switched over again by the control unit 50, so that a change in direction is effected by actuating the electromagnetic elements 37 of the controllable valve 36 via the control lines 54 becomes.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Paleontology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Agronomy & Crop Science (AREA)
  • Soil Sciences (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Erzeugen von Schlagimpulsen oder Schwingungen für eine Baumaschine, mit einem Gehäuse, einem Kolben, welcher in einem Arbeitsraum in dem Gehäuse reversierend zwischen einem ersten Umkehrpunkt und einem zweiten Umkehrpunkt hin und her bewegbar ist, und einer Druckfluidversorgung, durch welche im Bereich des ersten Umkehrpunktes und des zweiten Umkehrpunktes jeweils Druckfluid in den Arbeitsraum ein- und ausleitbar ist, wobei der Kolben zum Erzeugen der Schlagimpulse beziehungsweise der Schwingungen in die reversierende Bewegung versetzbar ist, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a device for generating impact pulses or vibrations for a construction machine, having a housing, a piston which can be moved back and forth in a working chamber in the housing in a reversing manner between a first reversal point and a second reversal point, and a pressurized fluid supply through which in the region of the first reversal point and the second reversal point, pressure fluid can be introduced into and discharged from the working chamber, the piston being able to be set into the reversing movement to generate the impact pulses or the vibrations, according to the preamble of claim 1.

Die Erfindung betrifft weiterhin ein Verfahren zum Erzeugen von Schlagimpulsen oder Schwingungen für eine Baumaschine, bei dem ein Kolben in einem Arbeitsraum in einem Gehäuse reversierend zwischen einem ersten Umkehrpunkt und einem zweiten Umkehrpunkt hin und her bewegt wird, wobei zum Erzeugen der Schlagimpulse beziehungsweise der Schwingungen der Kolben mittels eines Druckfluides in eine reversierende Bewegung versetzt wird und das Druckfluid im Bereich des ersten Umkehrpunktes und des zweiten Umkehrpunktes in den Arbeitsraum ein- und ausgeleitet wird, gemäß dem Oberbegriff des Anspruchs 10.The invention further relates to a method for generating impact impulses or vibrations for a construction machine, in which a piston in a working chamber in a housing is reversibly moved back and forth between a first reversal point and a second reversal point, with the impact impulses or vibrations being generated by the piston is set in reversing motion by means of a pressure fluid and the pressure fluid is fed into and out of the working chamber in the area of the first reversal point and the second reversal point, according to the preamble of claim 10.

Ein Schwingungserzeuger ist aus der EP 1 728 564 B1 bekannt. Bei diesem bekannten Schwingungserzeuger wird der Arbeitsraum in dem Gehäuse durch einen Arbeitskolben in zwei Druckkammern unterteilt. Die beiden Druckkammern werden gezielt über einen Einlass und einen Auslass mit einem Druckfluid wechselweise versorgt oder entsorgt, so dass sich der Arbeitskolben reversierend bewegt und eine Schwingung erzeugt. Die zeitlich abgestimmte Versorgung und Entsorgung von Druckfluid in die einzelnen Druckkammern erfolgt über eine komplexe Kanalanordnung in dem Arbeitskolben. Zudem ist innerhalb des Arbeitskolbens noch ein Steuerkolben verschiebbar gelagert, welcher seine Position relativ zum Arbeitskolben durch an den Stirnseiten des Gehäuses vorstehende Anschläge gezielt verändern kann, um bestimmte Kanäle freizugeben oder zu sperren. Die Ver- und Entsorgung von Druckfluid wird somit durch mechanische Maßnahmen erreicht, wobei bei Erreichen bestimmter Umschaltpunkte durch die vorgegebenen Kanäle eine Umschaltung der Druckfluidversorgung und der Entsorgung erfolgt.A vibrator is from the EP 1 728 564 B1 known. In this known vibration generator, the working space in the housing is divided into two pressure chambers by a working piston. The two pressure chambers are targeted with a pressurized fluid via an inlet and an outlet alternately supplied or disposed of, so that the working piston moves reversing and generates an oscillation. The time-coordinated supply and disposal of pressure fluid in the individual pressure chambers takes place via a complex channel arrangement in the working piston. In addition, a control piston is also slidably mounted within the working piston, which can change its position relative to the working piston in a targeted manner by means of stops protruding on the end faces of the housing in order to open or block certain channels. The supply and disposal of pressurized fluid is thus achieved by mechanical measures, with the pressurized fluid supply and disposal being switched over when certain switchover points are reached through the predetermined channels.

Vergleichbare mechanische Steuereinrichtungen bei Schwingungserzeugern gehen beispielsweise auch aus der GB-A-920,158 , US-A-4,026,193 oder der US-A-4,031,812 hervor. All diese bekannten Vorrichtungen weisen einen Arbeitskolben und einen Steuerkolben auf, welche abhängig von der jeweiligen Position im Gehäuse bestimmte Kanäle öffnen oder schließen, wodurch eine gezielte wechselweise Versorgung der beiden gegenüberliegenden Druckkammern zum Bewegen des Arbeitskolbens bewirkt wird.Comparable mechanical control devices for vibrators go, for example, from the GB-A-920,158 , US-A-4,026,193 or the US-A-4,031,812 out. All of these known devices have a working piston and a control piston, which open or close certain channels depending on the respective position in the housing, causing a targeted alternating supply of the two opposite pressure chambers for moving the working piston.

Derartige Vorrichtungen sind in der Herstellung zeit- und kostenaufwändig. Zudem wird durch das Kanalbild bei einem vorgegebenen Druckniveau ein bestimmtes Schwingungs- oder Schlagverhalten des Kolbens fest vorgegeben. Eine Veränderung der Schwingungsfrequenz und der Schlagenergie sind nur in eng begrenztem Umfang möglich und bedürfen teilweise aufwändiger mechanischer Überarbeitungen.Such devices are time-consuming and expensive to manufacture. In addition, a certain vibration or impact behavior of the piston is permanently specified by the channel pattern at a specified pressure level. A change in the vibration frequency and the impact energy is only possible to a very limited extent and sometimes requires complex mechanical revisions.

Eine gattungsgemäße Vorrichtung geht aus der JP H11 158860 A hervor. Die Bewegung eines Kolbens wird mit einem Verschiebesensor erfasst, welcher eine stangenförmige Messkomponente am Arbeitskolben umfasst. Die stangenförmige Messkomponente ist verschiebbar in einer zylindrischen Hülse gelagert. Anhand der erfassten Position des Arbeitskolbens wird ein Magnetventil zur Zuführung von Druckfluid zum reversierenden Bewegen des Arbeitskolbens gesteuert.A generic device is from JP H11 158860 A out. The movement of a piston is recorded with a displacement sensor, which includes a rod-shaped measuring component on the working piston. The rod-shaped measuring component is slidably mounted in a cylindrical sleeve. Based on the detected position of the working piston, a solenoid valve for supplying pressurized fluid for reversing movement of the working piston is controlled.

Ein weiterer Schwingungserzeuger ist aus der DE 30 38 835 A1 bekannt. Bei diesem wird eine Position des Arbeitskolbens über eine seitlich angeordnete Positionsfühlereinrichtung ermittelt. Die erfassten Positionsdaten dienen zur gesteuerten Zuführung des Druckfluids zum Erzeugen einer reversierenden Bewegung des Arbeitskolbens.Another vibrator is from the DE 30 38 835 A1 known. In this case, a position of the working piston is determined via a laterally arranged position sensor device. The recorded position data are used for the controlled supply of the pressure fluid to generate a reversing movement of the working piston.

Die EP 0 449 586 A1 offenbart eine Pfahlramme mit einem elektro-hydraulischen Servoventil. Ein Steuerstrom bewirkt dabei eine Verschiebung eines hydraulischen Steuerkolbens, durch welchen das Druckfluid zum Bewegen eines Arbeitskolbens gesteuert wird. Zur Positionserfassung ist ein Verschiebesensor an einer Gehäuseaußenseite angebracht.the EP 0 449 586 A1 discloses a pile driver with an electro-hydraulic servo valve. In this case, a control current causes a displacement of a hydraulic control piston, by means of which the pressure fluid for moving a working piston is controlled. A displacement sensor is attached to the outside of the housing for position detection.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung und ein Verfahren zum Erzeugen von Schlagimpulsen oder Schwingungen anzugeben, mit welchen bei einem einfachen und robusten Aufbau der Vorrichtung eine erhöhte Flexibilität bei der Einstellung und Veränderung des Schlag- oder Schwingungsverhaltens erreichbar sind.The invention is based on the object of specifying a device and a method for generating impact impulses or vibrations with which increased flexibility in setting and changing the impact or vibration behavior can be achieved with a simple and robust construction of the device.

Die Aufgabe wird zum einen durch eine Vorrichtung mit den Merkmalen des Anspruchs 1 und zum andern durch ein Verfahren mit den Merkmalen des Anspruchs 10 gelöst. Bevorzugte Ausführungsformen der Erfindung sind in den abhängigen Ansprüchen angegeben.The object is achieved on the one hand by a device having the features of claim 1 and on the other hand by a method having the features of claim 10 . Preferred embodiments of the invention are given in the dependent claims.

Bei der erfindungsgemäßen Vorrichtung ist vorgesehen, dass eine Messeinrichtung zum Bestimmen einer Position des Kolbens in dem Arbeitsraum vorgesehen ist, dass mindestens ein steuerbares Ventil angeordnet ist, durch welches das Druckfluid in den Arbeitsraum ein- und/oder ausleitbar ist, und dass eine Steuereinheit vorgesehen ist, welche mit der Messeinrichtung und dem mindestens einen steuerbaren Ventil in Verbindung steht, wobei durch die Steuereinheit die Bewegung des Kolbens in dem Arbeitsraum steuerbar und veränderbar ist.In the device according to the invention, it is provided that a measuring device is provided for determining a position of the piston in the working chamber, that at least one controllable valve is provided, through which the pressure fluid can be fed into and/or discharged from the working chamber, and that a control unit is provided which is connected to the measuring device and the at least one controllable valve, the movement of the piston in the working chamber being able to be controlled and changed by the control unit.

Eine Grundidee der Erfindung besteht darin, von einer bisherigen aufwändigen mechanischen Steuerung des Kolbens in dem Arbeitsraum abzugehen und hierfür eine elektrische oder elektronische Steuereinheit vorzusehen. Dabei wird gemäß der Erfindung mindestens eine Messeinrichtung zum Bestimmen der Position des Kolbens in dem Arbeitsraum vorgesehen. Die Messeinrichtung kann dabei kontinuierlich oder in vorgegebenen kurzen Zeitabständen Signale zu Positionsdaten des Kolbens abgeben. Diese Signale oder Daten werden von der Steuereinheit aufgenommen und abhängig von einer vorgegebenen Steuerlogik verarbeitet, wobei Steuersignale oder Steuerdaten für ein oder mehrere steuerbare Ventile erzeugt werden. Durch das mindestens eine steuerbare Ventil kann so gezielt Druckfluid in den Arbeitsraum ein- und ausgeleitet werden.A basic idea of the invention is to move away from the previously complex mechanical control of the piston in the working chamber and to provide an electrical or electronic control unit for this purpose. According to the invention, at least one measuring device is provided for determining the position of the piston in the working space. In this case, the measuring device can emit signals relating to position data of the piston continuously or at predetermined short time intervals. These signals or data are received by the control unit and processed depending on a predetermined control logic, with control signals or control data being generated for one or more controllable valves. By means of the at least one controllable valve, pressurized fluid can be fed into and discharged from the working space in a targeted manner.

Somit ist bei der erfindungsgemäßen Vorrichtung kein aufwändig herzustellender Arbeitskolben mit einer Vielzahl von darin angeordneten Leitungen erforderlich. Dies reduziert den Fertigungsaufwand erheblich. Zudem kann das Bewegungsverhalten des Kolbens in dem Gehäuse nunmehr besonders einfach gesteuert und auch verändert werden, indem die entsprechende Steuerlogik in der Steuereinheit geändert oder angepasst wird. Auf diese Weise kann relativ einfach der Hub und/oder die Frequenz der reversierenden Bewegung des Kolbens gesteuert und verändert werden.Thus, with the device according to the invention, there is no need for a working piston that is difficult to produce and has a large number of lines arranged therein. This reduces the production costs considerably. In addition, the movement behavior of the piston in the housing can now be controlled and also changed in a particularly simple manner by changing or adapting the corresponding control logic in the control unit. In this way, the stroke and/or the frequency of the reversing movement of the piston can be controlled and changed relatively easily.

Für die erfindungsgemäße Vorrichtung können grundsätzlich alle geeigneten steuerbaren Ventile eingesetzt werden. Besonders zweckmäßig ist es nach einer Weiterbildung der Erfindung, dass das Ventil ein Elektromagnetventil ist. Der Ventilkörper kann dabei durch eine elektromagnetische Anordnung zwischen einer öffnungs- und einer Schließposition verstellt werden. Dabei können auch Zwischenstellungen eingestellt werden, so dass sich die Zuführmenge an Druckfluid in den Arbeitsraum einstellen lässt. Grundsätzlich kann jedes Druckfluid vorgesehen sein, wobei vorzugsweise Hydrauliköl eingesetzt wird.In principle, all suitable controllable valves can be used for the device according to the invention. According to a development of the invention, it is particularly expedient for the valve to be an electromagnetic valve. The valve body can be adjusted between an open and a closed position by an electromagnetic arrangement. Intermediate positions can also be set here, so that the quantity of pressurized fluid fed into the working space is adjusted leaves. In principle, any pressure fluid can be provided, hydraulic oil preferably being used.

Nach der Erfindung ist vorgesehen, dass die Messeinrichtung einen Linearsensor aufweist. Dies ist insbesondere dann sinnvoll, wenn der Kolben im Gehäuse linear zwischen den beiden Umkehrpunkten bewegt wird.According to the invention it is provided that the measuring device has a linear sensor. This is particularly useful when the piston in the housing is moved linearly between the two reversal points.

Gemäß der Erfindung weist die Messeinrichtung eine längliche erste Messkomponente auf, welche sich in den Arbeitsraum und in einen Freiraum im Kolben erstreckt. Somit wird die Messkomponente nicht hinter einer Wand des Gehäuses angeordnet, sondern unmittelbar in dem Arbeitsraum, in welchem sich der Kolben bewegt. Für eine besonders genaue Positionsmessung ragt dabei die längliche erste Messkomponente in einen entsprechenden Freiraum in den Kolben hinein, wobei der Kolben vorzugsweise berührungsfrei entlang der ersten Messkomponente gleitet.According to the invention, the measuring device has an elongate first measuring component which extends into the working space and into a free space in the piston. Thus, the measuring component is not arranged behind a wall of the housing, but directly in the working space in which the piston moves. For a particularly precise position measurement, the elongate first measurement component protrudes into a corresponding free space in the piston, with the piston preferably sliding along the first measurement component without contact.

Dabei ist es vorgesehen, dass in dem Freiraum des Kolbens eine zweite Messkomponente, ein Magnet, angeordnet ist. Die beiden Messkomponenten wirken dabei derart zusammen, so dass eine sehr exakte Positionsbestimmung der zweiten Messkomponente und damit des Kolbens relativ zur ersten Messkomponente und damit relativ zum Arbeitsraum und dem Gehäuse ermittelbar ist. Die erste Messkomponente kann eine Spule aufweisen, in welcher der Magnet einen Strom von beispielsweise 4 bis 20 mA als ein Maß für die Position des Kolbens induziert.It is provided that a second measuring component, a magnet, is arranged in the free space of the piston. The two measuring components interact in such a way that a very precise determination of the position of the second measuring component and thus of the piston relative to the first measuring component and thus relative to the working space and the housing can be determined. The first measuring component can have a coil in which the magnet induces a current of, for example, 4 to 20 mA as a measure of the position of the piston.

Grundsätzlich kann der Kolben in dem Gehäuse reversierend derart bewegt werden, dass der Kolben mit seinen beiden Stirnseiten die Gehäusewand nicht berührt. Auf diese Weise kann die Vorrichtung als ein sogenannter Schwingungserzeuger eingesetzt werden. Eine vorteilhafte Ausbildung der Erfindung besteht darin, dass an zumindest einem Umkehrpunkt eine Schlagfläche angeordnet ist, auf welcher der Kolben zum Erzeugen eines Schlagimpulses gezielt aufschlägt. Grundsätzlich kann eine Schlagfläche zu beiden gegenüberliegenden Stirnseiten des Kolbens am Gehäuse angeordnet sein. Bevorzugt ist jedoch lediglich eine einzige Schlagfläche, so dass gezielte Schlagimpulse erzeugbar sind, wie sie etwa für ein Schlagbohren gewünscht sind.In principle, the piston can be moved reversingly in the housing in such a way that the piston does not touch the housing wall with its two end faces. In this way the device can be used as a so-called vibrator. An advantageous embodiment of the invention consists in that an impact surface is arranged at at least one reversal point, on which the piston strikes in a targeted manner to generate an impact pulse. In principle, an impact surface can be arranged on the two opposite end faces of the piston on the housing. However, only a single striking surface is preferred, so that targeted impact impulses can be generated, such as are desired for percussion drilling.

Nach einer weiteren Variante der Erfindung ist es bevorzugt, dass durch die Steuereinheit eine Frequenz und/oder ein Hub des Kolbens einstellbar und verstellbar sind. Zur Veränderung der Frequenz sind insbesondere die Öffnungs- und Schließzeitpunkte und gegebenenfalls die Zuführung von Hydraulikenergie durch die Steuereinheit einstellbar. Auch kann der Hub des Kolbens durch eine Lageveränderung der beiden Umkehrpunkte durch eine entsprechende Öffnung und Schließung der steuerbaren Ventile erzielt werden. Hierfür weist die Steuereinheit vorzugsweise eine Eingabeschnittstelle, beispielsweise ein Eingabefeld, auf. Auch kann die Steuereinheit unmittelbar durch eine übliche Maschinensteuerung von einer Bedieneinheit durch einen Bediener entsprechend betätigt werden.According to a further variant of the invention, it is preferred that a frequency and/or a stroke of the piston can be set and adjusted by the control unit. In order to change the frequency, in particular the opening and closing times and, if necessary, the supply of hydraulic energy can be adjusted by the control unit. The stroke of the piston can also be achieved by changing the position of the two reversal points by opening and closing the controllable valves accordingly. For this purpose, the control unit preferably has an input interface, for example an input field. The control unit can also be actuated directly by an operator using a conventional machine control system from an operating unit.

Eine weitere bevorzugte Ausführungsvariante der Erfindung kann darin gesehen werden, dass die Steuereinheit einen Programmspeicher aufweist, in welchem verschiedene Steuerprogramme zum Steuern des Kolbens abspeicherbar sind. So können für bestimmte Einsatzzwecke spezielle Steuerprogramme hinterlegt werden. So kann beispielsweise zu Beginn eines Programms eine hohe Frequenz mit einem kleinen Kolbenhub vorgesehen sein, während sich im Programmablauf über die Zeit dann der Kolbenhub vergrößert und eine Frequenz verkleinert. Es können nahezu beliebig viele unterschiedliche Programmabläufe zur Steuerung des Kolbens hinsichtlich von Frequenz und Hub vorgesehen werden. So kann ein Programm für einen schnellen Vortrieb oder ein besonders schonendes Eintreiben vorgesehen sein. Auch können Programme für spezielle Bodenarten hinterlegt sein.A further preferred embodiment variant of the invention can be seen in the fact that the control unit has a program memory in which various control programs for controlling the piston can be stored. In this way, special control programs can be stored for specific purposes. For example, at the beginning of a program, a high frequency with a small piston stroke can be provided, while the piston stroke then increases over time in the course of the program and a frequency decreases. Almost any number of different program sequences can be provided for controlling the piston in terms of frequency and stroke. A program for rapid propulsion or particularly gentle driving can be provided. Programs for special soil types can also be stored.

Die Erfindung umfasst eine Baumaschine, welche dadurch gekennzeichnet ist, dass die vorbeschriebene Vorrichtung zum Erzeugen von Schlagimpulsen oder Schwingungen angeordnet ist. Insbesondere kann die Baumaschine für den Tiefbau vorgesehen sein.The invention includes a construction machine, which is characterized in that the above-described device is arranged to generate impact impulses or vibrations. In particular, the construction machine can be provided for civil engineering.

Besonders vorteilhaft ist es nach einer Ausführungsform der Erfindung, dass die Baumaschine ein Erdbohrgerät ist. Ist dabei die Vorrichtung zum Erzeugen von Schlagimpulsen vorgesehen, kann ein Schlagbohren durchgeführt werden. Dies ist insbesondere beim Durchdringen von härteren Gesteinsschichten vorteilhaft. Alternativ oder ergänzend kann die Vorrichtung auch frei von Schlagkontakten zum Erzeugen von Schwingungen ausgebildet sein. Bei einem Erdbohrgerät mit einem drehend angetriebenen Bohrwerkzeug kann so insbesondere ein sogenanntes Überlagerungsbohren durchgeführt werden. Dabei wird die Drehbewegung des Bohrwerkzeuges durch eine Vibrations- oder Schwingungsbewegung überlagert. Durch überlagerte Schwingungen kann eine quasi Verflüssigung des Bodens, zumindest im Kontaktbereich mit dem Bohrwerkzeug erzielt werden, was zu einem verbesserten Bohrfortschritt führt.According to one embodiment of the invention, it is particularly advantageous for the construction machine to be an earth boring device. If the device for generating percussion pulses is provided, percussion drilling can be carried out. This is particularly advantageous when penetrating harder layers of rock. Alternatively or additionally, the device can also be designed without impact contacts for generating vibrations. So-called overburden drilling can be carried out in particular in the case of an earth drilling device with a rotationally driven drilling tool. The rotary movement of the drilling tool is superimposed by a vibration or oscillation movement. By means of superimposed vibrations, a quasi liquefaction of the soil can be achieved, at least in the contact area with the drilling tool, which leads to improved drilling progress.

Eine andere Ausführungsform der Erfindung kann darin gesehen werden, dass die Baumaschine eine Ramme oder ein Rüttler ist. Derartige Rammen oder Rüttler können etwa zum Einbringen von Stahlträgern, Pfählen oder Spundwandbohlen eingesetzt werden, welche in den Boden durch Schlagimpulse oder durch Vibrationen eingetrieben werden.Another embodiment of the invention can be seen in the fact that the construction machine is a ram or a vibrator. Rams or vibrators of this type can be used, for example, for installing steel girders, piles or sheet piling, which are driven into the ground by impact impulses or by vibrations.

Das erfindungsgemäße Verfahren ist dadurch gekennzeichnet, dass die Position des Kolbens mit einer Messeinrichtung erfasst wird und dass eine Steuereinheit abhängig von der erfassten Position des Kolbens mindestens ein steuerbares Ventil steuert, durch welches Druckfluid in den Arbeitsraum ein- und/oder ausgeleitet wird, wobei durch die Steuereinheit die Bewegung des Kolbens gesteuert wird.The method according to the invention is characterized in that the position of the piston is detected with a measuring device and that a control unit, depending on the detected position of the piston, controls at least one controllable valve through which pressurized fluid is fed into and/or discharged from the working chamber, with the control unit controls the movement of the piston.

Das erfindungsgemäße Verfahren wird mit der zuvor beschriebenen Vorrichtung durchgeführt. Es ergeben sich dabei die zuvor beschriebenen Vorteile.The method according to the invention is carried out using the device described above. This results in the advantages described above.

Die Erfindung wird nachfolgend anhand eines bevorzugten Ausführungsbeispiels weiter beschrieben, welches schematisch in der beigefügten Zeichnung dargestellt ist.The invention is further described below with reference to a preferred exemplary embodiment, which is shown schematically in the attached drawing.

In der einzigen Zeichnung ist eine erfindungsgemäße Vorrichtung 10 dargestellt, welche zur Erzeugung von Schlagimpulsen ausgebildet ist. Die Vorrichtung 10 weist ein Gehäuse 12 mit einem zylindrischen Arbeitsraum 14 auf, in welchem ein etwa zylindrischer Kolben 20 reversierend zwischen zwei Umkehrpunkten linear bewegbar gelagert ist. Der Kolben 20 ist fluiddicht in dem Gehäuse 12 gelagert und kann, wie in dem Ausführungsbeispiel dargestellt, mit einer Seite aus dem Gehäuse 12 herausragen.In the single drawing, a device 10 according to the invention is shown, which is designed to generate impact pulses. The device 10 has a housing 12 with a cylindrical working chamber 14 in which an approximately cylindrical piston 20 is mounted so as to be linearly movable reversing between two reversal points. The piston 20 is mounted in the housing 12 in a fluid-tight manner and, as shown in the exemplary embodiment, can protrude from the housing 12 with one side.

Mit einer freien Stirnseite 24 trifft der Kolben 20 auf eine korrespondierende Schlagfläche 18 auf, welche beispielsweise ein Einsteckende einer Bohrantriebswelle sein kann.With a free end face 24, the piston 20 hits a corresponding impact surface 18, which can be, for example, a shank of a drilling drive shaft.

Im Bereich des oberen ersten Umkehrpunktes ist an dem Gehäuse 12 eine erste Öffnung 15 für eine erste Versorgungsleitung 31 einer Druckfluidversorgung 30 vorgesehen. Im Bereich eines unteren zweiten Umkehrpunktes ist der Arbeitsraum 14 durch eine zweite Öffnung 16 mit einer zweiten Versorgungsleitung 32 der Druckfluidversorgung 30 verbunden. Über ein steuerbares Ventil 36, welches in dem dargestellten Ausführungsbeispiel als ein 2/4-Wegeventil ausgebildet ist, werden die beiden Öffnungen 15, 16 wechselweise mit einer Hydraulikdruckquelle P und einem drucklosen Entsorgungstank T verbunden. Hierdurch werden zwei gegenüberliegende Druckkammern in dem Arbeitsraum 14 jeweils wechselweise mit Druckfluid gefüllt und von dem Druckfluid entleert. Hierdurch wird der Kolben 20 in eine gewünschte reversierende Bewegung in dem Gehäuse 12 versetzt.A first opening 15 for a first supply line 31 of a pressurized fluid supply 30 is provided on the housing 12 in the area of the upper first reversal point. In the area of a lower, second reversal point, the working chamber 14 is connected to a second supply line 32 of the pressurized fluid supply 30 through a second opening 16 . The two openings 15, 16 are alternately connected to a hydraulic pressure source P and an unpressurized disposal tank T via a controllable valve 36, which is designed as a 2/4-way valve in the exemplary embodiment shown. As a result, two opposing pressure chambers in the working chamber 14 are alternately filled with pressure fluid and emptied of the pressure fluid. As a result, the piston 20 is set in a desired reversing movement in the housing 12 .

Gemäß der Erfindung ist an dem Gehäuse 12 eine Messeinrichtung 40 mit einer ersten länglichen Messkomponente 42 vorgesehen. Die erste Messkomponente 42 ist stangenartig ausgebildet und erstreckt sich in den Arbeitsraum 14 und in einen korrespondierend hierzu angeordneten Freiraum 22 in dem Kolben 20. An dem Freiraum 22 ist in einem unteren Bereich ein ringförmiger Magnet als zweite Messkomponente 44 angeordnet. Die zweite Messkomponente 44 ist fest mit dem bewegbaren Kolben 20 verbunden, während die längliche erste Messkomponente 42 fest an dem Gehäuse 12 angebracht ist. Die Messeinrichtung 40 ist etwa als ein induktiver Linearsensor ausgebildet, welcher exakt die Position der zweiten Messkomponente 44 und damit des Kolbens 20 gegenüber der länglichen ersten Messkomponente 42 und damit die Position des Kolbens 20 in dem Arbeitsraum 14 ermittelt.According to the invention, a measuring device 40 with a first elongate measuring component 42 is provided on the housing 12 . The first measuring component 42 is rod-like and extends into the working chamber 14 and into a correspondingly arranged free space 22 in the piston 20. A ring-shaped magnet is arranged in a lower area of the free space 22 as a second measuring component 44. The second sensing component 44 is fixedly connected to the moveable piston 20 while the elongate first sensing component 42 is fixedly attached to the housing 12 . The measuring device 40 is embodied as an inductive linear sensor, which exactly determines the position of the second measuring component 44 and thus of the piston 20 in relation to the elongated first measuring component 42 and thus the position of the piston 20 in the working chamber 14 .

Die Messeinrichtung 40 ist über eine Leitungsverbindung 52 mit einer Steuereinheit 50 verbunden, wobei analoge Signale oder digitale Daten zur momentanen Position des Kolbens 20 in dem Arbeitsraum 14 übermittelt werden. Abhängig von einer vorgegebenen Programm- oder Steuerlogik der Steuereinheit 50 wird das steuerbare Ventil 36 über elektromagnetische Elemente 37 angesteuert, so dass etwa die erste Versorgungsleitung 31 mit dem drucklosen Tank T und die zweite Versorgungsleitung 32 mit der Druckquelle P verbunden ist, wie in der Zeichnung dargestellt ist. Bei einer Umschaltung des Ventils 36 durch die Steuereinheit 50 kann dann die Druckquelle P mit der ersten Versorgungsleitung 31 verbunden werden, während der Tank T mit der zweiten Versorgungsleitung 32 verbunden wird. Bei dieser Ventilstellung wird dann der untere Bereich des Arbeitsraums 14 von Druckfluid entleert, während gleichzeitig ein oberer Bereich des Arbeitsraums 14 mit Druckfluid befüllt wird, wobei sich der Kolben 20 dann von dem oberen ersten Umkehrpunkt nach unten zu dem unteren zweiten Umkehrpunkt bewegt. Stellt die Messeinrichtung 14 das Erreichen eines Auslösepunkte des Kolbens 20 in dem Gehäuse 12 fest, kann dann wieder eine Umschaltung des Ventils 36 durch die Steuereinheit 50 erfolgen, so dass eine Richtungsänderung durch Betätigen der elektromagnetischen Elemente 37 des steuerbaren Ventils 36 über die Steuerleitungen 54 bewirkt wird.The measuring device 40 is connected to a control unit 50 via a line connection 52, analog signals or digital data relating to the current position of the piston 20 in the working chamber 14 being transmitted. Depending on a predetermined program or control logic of the control unit 50, the controllable valve 36 is activated via electromagnetic elements 37, so that the first supply line 31 is connected to the unpressurized tank T and the second supply line 32 is connected to the pressure source P, as in the drawing is shown. at By switching over the valve 36 by the control unit 50, the pressure source P can then be connected to the first supply line 31, while the tank T is connected to the second supply line 32. In this valve position, the lower area of the working chamber 14 is then emptied of pressurized fluid, while at the same time an upper area of the working chamber 14 is filled with pressurized fluid, with the piston 20 then moving down from the upper first reversal point to the lower second reversal point. If the measuring device 14 determines that a triggering point of the piston 20 in the housing 12 has been reached, the valve 36 can then be switched over again by the control unit 50, so that a change in direction is effected by actuating the electromagnetic elements 37 of the controllable valve 36 via the control lines 54 becomes.

Durch entsprechende Änderung der Steuerlogik in der Steuereinheit 50 können die Frequenz des Kolbens 20 sowie der Hub des Kolbens 20 zwischen den zwei Umkehrpunkten ohne weiteres verändert und eingestellt werden.By changing the control logic in the control unit 50 accordingly, the frequency of the piston 20 and the stroke of the piston 20 between the two reversal points can be easily changed and adjusted.

Claims (10)

  1. Device for generating percussive pulses or vibrations for a construction machine, having
    - a housing (12),
    - a piston (20) which is reversibly reciprocatable in a working space (14) in the housing (12) between a first reversal point and a second reversal point, and
    - a pressure fluid supply (30), through which pressure fluid can in each case be led into and out of the working space (14) in the region of the first reversal point and the second reversal point, wherein the piston (20) can be set into the reversible movement in order to generate the percussive pulses or vibrations,
    - wherein a measuring means (40) for determining a position of the piston (20) in the working space (14) is provided,
    - wherein at least one controllable valve (36) is arranged, through which the pressure fluid can be led into and/or out of the working space (14), and
    - wherein a control unit (50) is provided which is connected to the measuring means (40) and the at least one controllable valve (36), wherein by the control unit (50) the movement of the piston (20) in the working space (14) can be controlled and changed,
    characterized in that
    - an annular magnet is firmly connected to the piston (20), which is arranged in a free space (22) inside the piston (20),
    - in that a rod-like first measuring component (42) of the measuring device (40) is fixedly arranged on the housing (12), which extends into the working space (14) receiving pressure fluid and in the free space (22) of the piston (20), and
    - in that the piston (20) with the ring-shaped magnet as the second measuring component (44) of the measuring device (40) slides without contact along the rod-like measuring component (42).
  2. Device according to claim 1,
    characterized in that
    the valve (36) is an electromagnetic valve.
  3. Device according to claim 1 or 2,
    characterized in that
    the measuring means (40) has a linear sensor.
  4. Device according to any one of claims 1 to 3,
    characterized in that
    on at least one reversal point a percussion surface (18) is arranged, onto which the piston (20) strikes specifically in order to generate a percussive pulse.
  5. Device according to any one of claims 1 to 4,
    characterized in that
    by the control unit (50) a frequency and/or a stroke of the piston (20) can be set and adjusted.
  6. Device according to any one of claims 1 to 5,
    characterized in that
    the control unit (50) has a program memory, in which different control programs for controlling the piston (20) can be stored.
  7. Construction machine,
    characterized in that
    a device (10) for generating percussive pulses or vibrations according to any one of claims 1 to 6 is arranged.
  8. Construction machine according to claim 7,
    characterized in that
    this is an earth drilling apparatus.
  9. Construction machine according to claim 8,
    characterized in that
    this is a pile driver or a vibrator.
  10. Method for generating percussive pulses or vibrations for a construction machine, with a device (10) according to any one of claims 1 to 6, in which
    - a piston (20) is reversibly reciprocated in a working space (14) in a housing (12) between a first reversal point and a second reversal point,
    - wherein, for the purpose of generating the percussive pulses or vibrations, the piston (20) is set into a reversible movement by means of a pressure fluid and the said pressure fluid is led into and out of the working space (14) in the region of the first reversal point and the second reversal point,
    - wherein the position of the piston (20) is detected by way of a measuring means (40) and
    - wherein depending on the detected position of the piston (20) a control unit (50) controls at least one controllable valve (36), through which pressure fluid is led into and/or out of the working space (14),
    - wherein by the control unit (50) the movement of the piston (20) is controlled.
EP17176586.0A 2017-06-19 2017-06-19 Device and method for generating impact impulses or vibration of a construction machine Active EP3417951B1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP17176586.0A EP3417951B1 (en) 2017-06-19 2017-06-19 Device and method for generating impact impulses or vibration of a construction machine
PT171765860T PT3417951T (en) 2017-06-19 2017-06-19 Device and method for generating impact impulses or vibration of a construction machine
DK17176586.0T DK3417951T3 (en) 2017-06-19 2017-06-19 DEVICE AND METHOD FOR GENERATING IMPACT PULSE OR VICTIONS FOR A BUILDING MACHINE
ES17176586T ES2922006T3 (en) 2017-06-19 2017-06-19 Device and method for generating shock pulses or vibrations for a construction machine
CA3005244A CA3005244C (en) 2017-06-19 2018-05-18 Device and method for generating percussive pulses or vibrations for a construction machine
US15/984,043 US10730075B2 (en) 2017-06-19 2018-05-18 Device and method for generating percussive pulses or vibrations for a construction machine
KR1020180069600A KR102090038B1 (en) 2017-06-19 2018-06-18 Device and method for generating percussive pulses or vibrations for a construction machine
JP2018115130A JP6676104B2 (en) 2017-06-19 2018-06-18 Apparatus and method for generating shock pulses or vibrations for construction machinery
CN201810628094.5A CN109127346B (en) 2017-06-19 2018-06-19 Device and method for generating impact pulses or vibrations for a construction machine

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EP (1) EP3417951B1 (en)
JP (1) JP6676104B2 (en)
KR (1) KR102090038B1 (en)
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CA3005244C (en) 2020-04-28
CA3005244A1 (en) 2018-12-19
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CN109127346A (en) 2019-01-04
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EP3417951A1 (en) 2018-12-26
PT3417951T (en) 2022-07-08

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