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EP4183924A1 - Soil working roller and method for operating a soil working roller - Google Patents

Soil working roller and method for operating a soil working roller Download PDF

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Publication number
EP4183924A1
EP4183924A1 EP22202044.8A EP22202044A EP4183924A1 EP 4183924 A1 EP4183924 A1 EP 4183924A1 EP 22202044 A EP22202044 A EP 22202044A EP 4183924 A1 EP4183924 A1 EP 4183924A1
Authority
EP
European Patent Office
Prior art keywords
unbalanced
mass
unbalance
drive motor
roller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP22202044.8A
Other languages
German (de)
French (fr)
Other versions
EP4183924B1 (en
Inventor
Josef DAGNER
Stefan BRAUNSCHLÄGER
Stefan Bäuml
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.)
Hamm AG
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Hamm AG
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Publication date
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Publication of EP4183924A1 publication Critical patent/EP4183924A1/en
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Publication of EP4183924B1 publication Critical patent/EP4183924B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
    • E01C19/28—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
    • E01C19/28—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
    • E01C19/286—Vibration or impact-imparting means; Arrangement, mounting or adjustment thereof; Construction or mounting of the rolling elements, transmission or drive thereto, e.g. to vibrator mounted inside the roll
    • 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
    • B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
    • B06B1/16—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving rotary unbalanced masses
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting

Definitions

  • the present invention relates to a soil tillage roller which can be used in a soil tillage machine, for example a soil compactor, to till soil, in particular to compact it.
  • the invention further relates to a method for operating such a soil tillage roller or a soil tillage machine having such a soil tillage roller.
  • a soil tillage roller which can be used as a compactor roller in a soil tillage machine constructed as a soil compactor, for example, can have an unbalanced arrangement with at least one unbalanced mass rotatable about an unbalanced axis of rotation. If the unbalanced axis of rotation corresponds to the axis of rotation of the soil tillage roller, the at least one rotating unbalanced mass exerts a force that is orthogonal to the axis of rotation of the soil tillage roller and the soil tillage roller is thus set into a periodic vibration movement that is essentially orthogonal to the axis of rotation of the soil tillage roller.
  • the rotating unbalances can exert a periodically changing torque on the soil tillage roller that is oriented essentially tangentially with respect to the axis of rotation of the soil tillage roller , to set the soil tillage roller in a periodic oscillating motion.
  • an unbalanced electric drive motor can be provided in association with a soil cultivating roller, by means of which the at least one unbalanced mass is driven to rotate can be.
  • the unbalance arrangement When the unbalance arrangement is deactivated and the unbalance electric drive motor is therefore not excited, it generates neither a drive torque nor a braking torque, so that an unbalance mass that is fundamentally to be driven to rotate by it will position itself in a rest position of minimal potential energy, in which the center of mass of such an unbalance mass is essentially vertical is positioned under the axis of rotation of the unbalance.
  • An unbalanced mass will move into this rest position if, starting from an operating state in which the unbalanced mass rotates at an operating speed about the associated unbalanced axis of rotation, the associated unbalanced electric drive motor is deactivated.
  • an unbalanced mass which is generally not subjected to a braking torque, oscillates around the rest position at a comparatively low frequency and with decreasing amplitude, which can be felt by a corresponding vibration on the soil tillage roller or soil tillage machine .
  • a soil tillage roller for a soil tillage machine comprising a roller shell that is elongated in the direction of a roller axis of rotation and surrounds a roller interior and an unbalanced arrangement arranged at least partially in the roller interior, the unbalanced arrangement being at least one by one Unbalanced axis of rotation, rotatable unbalanced mass with a center of gravity eccentric to the unbalanced axis of rotation and an unbalanced drive system with at least one unbalanced electric drive motor for driving the at least one unbalanced mass to rotate about the unbalanced axis of rotation, with the at least one unbalanced mass im Is essentially in a rest position, the unbalance drive system being designed to operate the at least one unbalance electric drive motor upon deactivation of the unbalance arrangement in an unbalance return phase such that the at least one unbalance mass is moved into the rest position
  • an unbalanced mass is prevented from oscillating when the unbalanced arrangement is deactivated, i.e. when the transition to a rest state, in that the at least one unbalanced mass is moved in a defined manner into the rest position, i.e. the state of minimum potential energy, by corresponding operation of the unbalanced electric drive motor becomes.
  • the at least one unbalanced mass is moved from a state of higher potential energy, i.e. a state in which the center of mass of the at least one unbalanced mass is higher than in the rest position, in a substantially continuous lowering movement in the direction of the rest position.
  • the imbalance drive system can be designed to move the at least one imbalance mass from a deflected position into the rest position when the imbalance arrangement is deactivated.
  • the at least one unbalanced mass is thus brought into the state of lower or minimal potential energy by operating the associated unbalanced electric drive motor between two positions, namely the deflection position on the one hand and the rest position on the other hand, without a pendulum movement.
  • the center of mass of the at least one unbalanced mass In the rest position, the center of mass of the at least one unbalanced mass can be positioned essentially vertically below the axis of rotation of the unbalanced mass in a vertical direction, i.e. assume the state of minimum potential energy, while in the deflection position the center of mass of the at least one unbalanced mass can be deflected at a deflection angle from the rest position.
  • the unbalanced drive system be designed to, upon deactivation of the Unbalanced arrangement, in particular at the beginning of the unbalanced return phase, to operate the at least one unbalanced electric drive motor to generate a holding torque.
  • the unbalanced drive system can be designed to conduct a holding current through the at least one unbalanced electric drive motor in order to generate the holding torque.
  • the unbalanced drive system can be designed to, in an unbalanced Braking phase to operate the unbalanced electric drive motor for generating a braking torque to reduce a speed of the at least one unbalanced mass, starting from an operating speed.
  • this imbalance braking phase can serve to move the at least one imbalance mass into the deflection position or to position it in the area of the deflection position, so that the at least one imbalance mass in the deflection position essentially comes to rest.
  • the braking torque be greater than the holding torque.
  • the braking torque can be in the range of the maximum braking torque that can be generated by the unbalance electric drive motor.
  • the unbalance drive system can be designed to operate the at least one unbalance electric drive motor to generate the holding torque when a transition speed is reached and/or when a predetermined braking time has elapsed since the start of the unbalance braking phase.
  • the transition speed can be zero, for example. This means that in the unbalanced braking phase, the at least one unbalanced mass practically is brought to a standstill and is positioned in the deflection position at the end of the unbalance braking phase or only moves at a very low speed in the area of the deflection position.
  • the holding torque is exerted by the at least one unbalanced mass when the at least one unbalanced mass is positioned at a
  • the reference deflection angle preferably being in the range of 90° with respect to the rest position. In this way, the at least one unbalanced mass is prevented from suddenly falling down because the holding torque is too low.
  • the unbalanced drive system can be designed to, with at least one unbalanced mass positioned in the deflection position, use the at least one unbalanced electric drive motor to reduce the torque generated by the at least one unbalanced electric drive motor, starting from the holding torque.
  • the lowering of the torque, starting from the holding torque can be achieved, for example, by the unbalanced drive system being designed to lower the current conducted through the unbalanced electric drive motor, starting from the holding current.
  • the unbalanced axis of rotation can correspond to at least one unbalanced mass, preferably every unbalanced mass, of the roller axis of rotation. If a soil tillage roller is to be set into an oscillating movement, it can alternatively or additionally be provided that the unbalanced axis of rotation of at least one unbalanced mass, preferably each unbalanced mass, is offset and arranged parallel to the roller axis of rotation.
  • the invention also relates to a soil tillage machine, preferably a soil compactor, comprising at least one soil tillage roller constructed according to the invention.
  • a soil treatment machine designed as a soil compactor is generally denoted by 10 .
  • the soil cultivating machine 10 comprises on a rear carriage 12 a soil cultivating roller 14 which can be rotated about a roller axis of rotation D 1 and has a roller jacket 18 enclosing a roller interior 16
  • Rear carriage 12 for steering the soil cultivating machine 10 articulated front carriage 22 the soil cultivating machine 10 has a further soil cultivating roller 24 with a roller interior 28 enclosed by a roller jacket 26.
  • a control station 30 from which an operator can operate the soil tillage machine 10, for example to move it over a soil to be compacted, such as. B. asphalt material to move.
  • both soil tillage rollers 14 can be driven to rotate about their roller axes of rotation D 1 , D 2 .
  • an electrohydraulic drive system with a hydraulic drive pump driven by an electric motor and a hydraulic drive motor assigned to each soil tillage roller 14 can be provided.
  • the unbalance arrangement 32 assigned to the soil tillage roller 14 comprises at least one unbalance mass 36 that can be driven to rotate about an unbalance axis of rotation U that corresponds to the roller axis of rotation D 1 in the example shown and that has a center of mass M that is eccentric to the unbalance axis of rotation U. It should be pointed out that in 2 the unbalanced mass 36 is shown positioned in two rotational positions about the unbalanced axis of rotation U, which will be explained below. It should also be pointed out that, for example, several such imbalance masses 36 in Direction of the unbalance axis of rotation U can be arranged in succession in the roll interior 16.
  • the unbalanced mass 36 is associated with an unbalanced electric drive motor 38 , for example also arranged in the roller interior 16 .
  • This can be fed from a battery, a fuel cell or the like provided on the soil compactor 10 and can drive the associated unbalanced mass 36 to rotate about the unbalanced axis of rotation U during soil processing operation, for example when compacting asphalt material or the like.
  • the unbalanced electric drive motor 38 can be provided to drive a plurality of unbalanced masses 36 arranged one after the other in the direction of the unbalanced axis of rotation U, for example.
  • the unbalanced electric drive motor 38 is preferably a three-phase electric motor which is controlled by an inverter and is supplied with the required voltage or current by means of the inverter for rotation at a desired speed or a desired torque becomes.
  • the unbalance electric drive motor 38 drives the unbalance mass 36 to rotate about the unbalance axis of rotation U at up to several thousand revolutions per minute.
  • a force that is essentially orthogonal with respect to the roller axis of rotation D 1 is exerted on the soil tillage roller 14 and sets it in a periodic vibrating motion.
  • the rotational speed of the unbalanced mass 36 about the unbalanced axis of rotation U is first reduced, for example at the beginning of the deactivation in an unbalanced braking phase.
  • the unbalanced electric drive motor 38 can be operated as a generator in order to get out of the decreasing kinetic energy of the unbalanced mass 36 to gain electrical energy and feed it into an energy store, for example a battery provided on the tillage machine 10 .
  • the unbalanced electric drive motor 38 can be operated in a braking mode, in which a braking torque counteracting the rotation of the unbalanced mass 36 is generated by energizing it.
  • the unbalanced electric drive motor 38 could also be operated in generator mode or in braking mode in different partial phases of the unbalanced braking phase.
  • the unbalanced electric drive motor 38 can be controlled in the unbalanced braking phase, for example to generate a maximum possible braking torque, with the further requirement that a speed in the region of zero is to be achieved as the setpoint speed .
  • the unbalanced mass 36 At the end of the unbalanced braking phase, ie when a transition speed in the region of zero is reached, the unbalanced mass 36 is in a fundamentally unknown deflection position.
  • the unbalanced mass 36 or its center of mass could be in an 2 rest position illustrated below, in which the center of mass M of the unbalanced mass 36 is positioned essentially vertically under the roller axis of rotation D 1 .
  • the unbalanced mass 36 will be positioned at the end of the unbalanced braking phase in a deflection position that does not correspond to the rest position and would be in this position if the unbalanced electric drive motor 38 was activated further with the specification that the target speed of the unbalanced mass 36 should be zero deflection position are held.
  • an unbalanced drive system 40 comprising, for example, the unbalanced electric drive motor 38 and an associated control unit goes into an unbalanced return phase in order to prevent oscillation and to avoid the unbalanced mass 36 swinging out.
  • the unbalanced mass 36 would execute a pendulum movement about the unbalanced axis of rotation U, i.e. no longer move past a top dead center of the circular movement.
  • This pendulum movement would continue with decreasing amplitude until the unbalanced mass 36 in 2 occupies the positioning shown below, in which the center of gravity M of the unbalanced mass 36 is positioned directly, ie vertically below the axis of rotation U of the unbalanced mass, in the direction of a vertical line V, ie in the direction of gravity.
  • the unbalanced mass 36 is or remains in this position, which corresponds to the rest position of the unbalanced mass 36, even when the unbalanced arrangement 32 or the unbalanced drive system 40 is deactivated.
  • the unbalanced electric drive motor 38 is energized during the transition to the unbalanced return phase in such a way that it generates a defined holding torque.
  • the holding torque is generally smaller than the maximum braking torque generated or that can be generated in the unbalanced braking phase and is defined, for example, in such a way that, when the holding torque is generated by the unbalanced electric drive motor 38, the unbalanced mass 36 remains or is held in the deflected position deflected from the rest position can be.
  • a torque is generated as the holding torque, which is so large that even if the deflection position has a reference deflection angle of 90° with respect to the rest position, the unbalanced mass 26 will not move in the direction of the rest position ..
  • the unbalanced mass 36 is positioned in such a way that the center of mass M of the same intersects the unbalanced axis of rotation U horizontal line H lies. This is a state in which, due to a maximum effective lever E between the unbalanced axis of rotation U and the center of mass M in the gravitational field, the unbalanced mass 36 generates a maximum torque counteracting or corresponding to the holding torque.
  • the unbalanced mass will initially remain in the deflected position. Starting from this state, the torque generated by the unbalance drive electric motor 38, starting from the holding torque, is then gradually reduced in the unbalance return phase. This is done by lowering the electrical current passed through the unbalanced electric drive motor 38 . Due to the linearly reduced torque or current, for example, the unbalanced mass 36 will, starting from the deflection position initially assumed, gradually move downwards towards the rest position and this will then occur when the torque generated by the unbalanced electric drive motor 38 has been reduced to a value of zero is to be at rest.
  • the unbalanced mass 36 When the torque provided by the unbalanced electric drive motor 38 is reduced from the holding torque to a value of zero, the unbalanced mass 36 is gradually and essentially continuously returned to the rest position without oscillating movement, so that essentially no overshoot or movement beyond the rest position takes place. The unbalanced mass 36 is therefore returned to the rest position without a perceptible pendulum movement on the soil treatment machine 10 . If this state is reached, the operation of the unbalanced drive system 40 is stopped or the unbalanced electric drive motor 38 is no longer subjected to a voltage, so that it is de-energized and does not generate any torque acting on the unbalanced mass 36 . Due to the force of gravity, the unbalanced mass 36 will remain in its rest position, in which it or its center of mass M assumes the position of minimum potential energy.
  • a particular advantage of the configuration of a soil tillage roller 14 or 24 according to the invention is that the transfer of an unbalanced mass 36 to a rest position can take place regardless of whether the soil tillage machine 10 is standing on a ground that is oriented horizontally in the gravitational field or on an inclined ground.
  • the unbalanced mass 36 In the rest position and with the unbalanced electric drive motor 38 deactivated, the unbalanced mass 36 will always assume the state of lowest potential energy, in which its center of mass M is positioned vertically, ie in the direction of gravity below the axis of rotation U of the unbalanced mass. No sensors are required to provide information about the slope of the ground on which the soil treatment machine 10 is located.
  • the holding torque to be generated by the unbalanced electric drive motor 38 can also be smaller, for example, than that for holding an unbalanced mass 36 in the 2 illustrated state with maximum torque generated by this holding torque required.
  • the time duration of the imbalance recovery phase can be shortened.
  • the duration of the unbalance return phase can also be shortened by, for example, deviating from a linear reduction in the torque, starting from the holding torque, by first reducing the torque or the current conducted through the unbalance electric drive motor 38 more quickly at the beginning of the unbalance return phase than at the end of the unbalance recovery phase.
  • the holding torque at the beginning of the unbalance return phase is generated in that direction about the unbalance axis of rotation U, which ensures that the unbalance mass 36 does not fall back into the rest position or is accelerated towards the rest position.
  • the holding torque is therefore generated in a clockwise direction. If the imbalance mass were 36 in 2 positioned to the right of the unbalance axis of rotation U, the holding torque would be generated counterclockwise.
  • the principles of the present invention can be used not only in an unbalanced arrangement intended to generate a vibrating movement, but also, for example, in an unbalanced arrangement in which, for example, two unbalanced masses with an unbalanced rotational axis that is offset and parallel to the rotational axis of the roll, for example, are mutually offset with respect to the rotational axis of the roll are arranged diametrically opposite.
  • unbalanced rotary axes of this type that are eccentric to the axis of rotation of the roller, the unbalanced masses will position themselves in the state of minimum potential energy when the unbalanced electric drive motor or unbalanced electric drive motors are not activated. In such arrangements, too, the procedure described above can be used to avoid a swinging motion of the unbalanced masses.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Road Paving Machines (AREA)
  • Soil Working Implements (AREA)

Abstract

Eine Bodenbearbeitungswalze für eine Bodenbearbeitungsmaschine, insbesondere Bodenverdichter, umfasst einen in Richtung einer Walzendrehachse (D<sub>1</sub>) langgestreckten, einen Walzeninnenraum (16) umgebenden Walzenmantel (18) und eine wenigstens teilweise in dem Walzeninnenraum (16) angeordnete Unwuchtanordnung (32), wobei die Unwuchtanordnung (32) wenigstens eine um eine Unwuchtdrehachse (U) drehbare Unwuchtmasse (36) mit zur Unwuchtdrehachse (U) exzentrischem Massenschwerpunkt (M) und ein Unwuchtantriebssystem (40) mit wenigstens einem Unwucht-Elektroantriebsmotor (38) zum Antreiben der wenigstens einen Unwuchtmasse (36) zur Drehung um die Unwuchtdrehachse (U) umfasst, wobei bei deaktivierter Unwuchtanordnung (32) die wenigstens eine Unwuchtmasse (36) im Wesentlichen in einer Ruhelage ist, wobei das Unwuchtantriebssystem (40) dazu ausgebildet ist, bei Deaktivierung der Unwuchtanordnung (32) in einer Unwucht-Rückführphase den wenigstens einen Unwucht-Elektroantriebsmotor (38) derart zu betreiben, dass die wenigstens eine Unwuchtmasse (36) in die Ruhelage bewegt wird.A soil tillage roller for a soil tillage machine, in particular a soil compactor, comprises a roller shell (18) that is elongated in the direction of a roller axis of rotation (D<sub>1</sub>), surrounding a roller interior (16) and an unbalanced arrangement arranged at least partially in the roller interior (16). (32), wherein the unbalanced arrangement (32) has at least one unbalanced mass (36) rotatable about an unbalanced axis of rotation (U) with a center of mass (M) eccentric to the unbalanced axis of rotation (U) and an unbalanced drive system (40) with at least one unbalanced electric drive motor (38) for Driving the at least one unbalanced mass (36) to rotate about the unbalanced axis of rotation (U), wherein when the unbalanced arrangement (32) is deactivated, the at least one unbalanced mass (36) is essentially in a rest position, the unbalanced drive system (40) being designed for this Deactivation of the unbalance arrangement (32) in an unbalance return phase to operate the at least one unbalance electric drive motor (38) in such a way that the at least one unbalance mass (36) is moved into the rest position.

Description

Die vorliegende Erfindung betrifft eine Bodenbearbeitungswalze, welche in einer Bodenbearbeitungsmaschine, zum Beispiel Bodenverdichter, dazu eingesetzt werden kann, einen Boden zu bearbeiten, insbesondere zu verdichten. Die Erfindung betrifft ferner ein Verfahren zum Betreiben einer derartigen Bodenbearbeitungswalze bzw. einer eine derartige Bodenbearbeitungswalze aufweisenden Bodenbearbeitungsmaschine.The present invention relates to a soil tillage roller which can be used in a soil tillage machine, for example a soil compactor, to till soil, in particular to compact it. The invention further relates to a method for operating such a soil tillage roller or a soil tillage machine having such a soil tillage roller.

Eine Bodenbearbeitungswalze, welche beispielsweise in einer als Bodenverdichter aufgebauten Bodenbearbeitungsmaschine als Verdichterwalze eingesetzt werden kann, kann eine Unwuchtanordnung mit wenigstens einer um eine Unwuchtdrehachse drehbaren Unwuchtmasse aufweisen. Entspricht die Unwuchtdrehachse der Drehachse der Bodenbearbeitungswalze, wird durch die wenigstens eine rotierende Unwuchtmasse eine zur Walzendrehachse orthogonal orientierte Kraft auf die Bodenbearbeitungswalze ausgeübt und somit die Bodenbearbeitungswalze in eine zur Drehachse der Bodenbearbeitungswalze im Wesentlichen orthogonale, periodische Vibrationsbewegung versetzt. Sind beispielsweise zwei Unwuchtmassen mit zur Drehachse der Bodenbearbeitungswalze versetzten und parallel angeordneten, bezüglich der Drehachse der Bodenbearbeitungswalze einander diametral gegenüberliegenden Unwuchtdrehachsen vorgesehen, kann durch die rotierenden Unwuchten ein bezüglich der Drehachse der Bodenbearbeitungswalze im Wesentlichen tangential orientiertes, periodisch sich änderndes Drehmoment auf die Bodenbearbeitungswalze ausgeübt werden, um die Bodenbearbeitungswalze in eine periodische Oszillationsbewegung zu versetzen.A soil tillage roller, which can be used as a compactor roller in a soil tillage machine constructed as a soil compactor, for example, can have an unbalanced arrangement with at least one unbalanced mass rotatable about an unbalanced axis of rotation. If the unbalanced axis of rotation corresponds to the axis of rotation of the soil tillage roller, the at least one rotating unbalanced mass exerts a force that is orthogonal to the axis of rotation of the soil tillage roller and the soil tillage roller is thus set into a periodic vibration movement that is essentially orthogonal to the axis of rotation of the soil tillage roller. If, for example, two unbalance masses are provided with unbalance axes of rotation that are offset and arranged parallel to the axis of rotation of the soil tillage roller and are diametrically opposite one another with respect to the axis of rotation of the soil tillage roller, the rotating unbalances can exert a periodically changing torque on the soil tillage roller that is oriented essentially tangentially with respect to the axis of rotation of the soil tillage roller , to set the soil tillage roller in a periodic oscillating motion.

Um in derartigen Bodenbearbeitungsmaschinen den Einsatz fossiler Brennstoffe zu vermeiden bzw. den Verbrauch fossiler Brennstoffe zu mindern, kann in Zuordnung zu einer Bodenbearbeitungswalze ein Unwucht-Elektroantriebsmotor vorgesehen sein, durch welchen die wenigstens eine Unwuchtmasse zur Drehung angetrieben werden kann. Bei deaktivierter Unwuchtanordnung und somit nicht erregtem Unwucht-Elektroantriebsmotor erzeugt dieser weder ein Antriebsdrehmoment, noch ein Bremsdrehmoment, so dass eine durch diesen grundsätzlich zur Drehung anzutreibende Unwuchtmasse sich in einer Ruhelage minimaler potentieller Energie positionieren wird, in welchem der Massenschwerpunkt einer derartigen Unwuchtmasse im Wesentlichen vertikal unter der Unwuchtdrehachse positioniert ist. In diese Ruhelage wird eine Unwuchtmasse sich bewegen, wenn, ausgehend von einem Betriebszustand, in welchem die Unwuchtmasse mit einer Betriebsdrehzahl um die zugeordnete Unwuchtdrehachse rotiert, der zugeordnete Unwucht-Elektroantriebsmotor deaktiviert wird. Am Ende des Übergangs in den Ruhezustand bzw. der Bewegung in die Ruhelage pendelt eine grundsätzlich nicht mit einem Bremsmoment beaufschlagte Unwuchtmasse mit einer vergleichsweise geringen Frequenz und mit abnehmender Amplitude um die Ruhelage, was durch eine entsprechende Schwingung an der Bodenbearbeitungswalze bzw. der Bodenbearbeitungsmaschine spürbar wird.In order to avoid the use of fossil fuels in such soil cultivating machines or to reduce the consumption of fossil fuels, an unbalanced electric drive motor can be provided in association with a soil cultivating roller, by means of which the at least one unbalanced mass is driven to rotate can be. When the unbalance arrangement is deactivated and the unbalance electric drive motor is therefore not excited, it generates neither a drive torque nor a braking torque, so that an unbalance mass that is fundamentally to be driven to rotate by it will position itself in a rest position of minimal potential energy, in which the center of mass of such an unbalance mass is essentially vertical is positioned under the axis of rotation of the unbalance. An unbalanced mass will move into this rest position if, starting from an operating state in which the unbalanced mass rotates at an operating speed about the associated unbalanced axis of rotation, the associated unbalanced electric drive motor is deactivated. At the end of the transition to the rest state or the movement into the rest position, an unbalanced mass, which is generally not subjected to a braking torque, oscillates around the rest position at a comparatively low frequency and with decreasing amplitude, which can be felt by a corresponding vibration on the soil tillage roller or soil tillage machine .

Es ist die Aufgabe der vorliegenden Erfindung, eine Bodenbearbeitungswalze für eine Bodenbearbeitungsmaschine und ein Verfahren zum Betreiben einer derartigen Bodenbearbeitungswalze vorzusehen, mit welchen das Auftreten einer Pendelbewegung einer Unwuchtmasse bei Deaktivierung einer Unwuchtanordnung, also beim Übergang in einen Ruhezustand, vermieden werden kann.It is the object of the present invention to provide a soil tillage roller for a soil tillage machine and a method for operating such a soil tillage roller, with which the occurrence of a pendulum movement of an unbalanced mass when an unbalanced arrangement is deactivated, i.e. when changing to a rest state, can be avoided.

Gemäß einem ersten Aspekt der vorliegenden Erfindung wird diese Aufgabe gelöst durch eine Bodenbearbeitungswalze für eine Bodenbearbeitungsmaschine, insbesondere Bodenverdichter, umfassend einen in Richtung einer Walzendrehachse langgestreckten, einen Walzeninnenraum umgebenden Walzenmantel und eine wenigstens teilweise in dem Walzeninnenraum angeordnete Unwuchtanordnung, wobei die Unwuchtanordnung wenigstens eine um eine Unwuchtdrehachse drehbare Unwuchtmasse mit zur Unwuchtdrehachse exzentrischem Massenschwerpunkt und ein Unwuchtantriebssystem mit wenigstens einem Unwucht-Elektroantriebsmotor zum Antreiben der wenigstens einen Unwuchtmasse zur Drehung um die Unwuchtdrehachse umfasst, wobei bei deaktivierter Unwuchtanordnung die wenigstens eine Unwuchtmasse im Wesentlichen in einer Ruhelage ist, wobei das Unwuchtantriebssystem dazu ausgebildet ist, bei Deaktivierung der Unwuchtanordnung in einer Unwucht-Rückführphase den wenigstens einen Unwucht-Elektroantriebsmotor derart zu betreiben, dass die wenigstens eine Unwuchtmasse in die Ruhelage bewegt wird.According to a first aspect of the present invention, this object is achieved by a soil tillage roller for a soil tillage machine, in particular a soil compactor, comprising a roller shell that is elongated in the direction of a roller axis of rotation and surrounds a roller interior and an unbalanced arrangement arranged at least partially in the roller interior, the unbalanced arrangement being at least one by one Unbalanced axis of rotation, rotatable unbalanced mass with a center of gravity eccentric to the unbalanced axis of rotation and an unbalanced drive system with at least one unbalanced electric drive motor for driving the at least one unbalanced mass to rotate about the unbalanced axis of rotation, with the at least one unbalanced mass im Is essentially in a rest position, the unbalance drive system being designed to operate the at least one unbalance electric drive motor upon deactivation of the unbalance arrangement in an unbalance return phase such that the at least one unbalance mass is moved into the rest position.

Bei einer erfindungsgemäß aufgebauten Bodenbearbeitungswalze wird das Auspendeln einer Unwuchtmasse bei Deaktivierung der Unwuchtanordnung, also beim Übergang in einen Ruhezustand, dadurch verhindert, dass durch entsprechendes Betreiben des Unwucht-Elektroantriebsmotors die wenigstens eine Unwuchtmasse definiert in die Ruhelage, also den Zustand minimaler potentieller Energie, bewegt wird. Es tritt keine Pendelbewegung auf, sondern die wenigstens eine Unwuchtmasse wird von einem Zustand höherer potentieller Energie, also einem Zustand, in welchem der Massenschwerpunkt der wenigstens einen Unwuchtmasse höher liegt als in der Ruhelage, in einer im Wesentlichen kontinuierlichen Absenkbewegung in Richtung zur Ruhelage bewegt.In a soil tillage roller constructed according to the invention, an unbalanced mass is prevented from oscillating when the unbalanced arrangement is deactivated, i.e. when the transition to a rest state, in that the at least one unbalanced mass is moved in a defined manner into the rest position, i.e. the state of minimum potential energy, by corresponding operation of the unbalanced electric drive motor becomes. There is no pendulum movement, but the at least one unbalanced mass is moved from a state of higher potential energy, i.e. a state in which the center of mass of the at least one unbalanced mass is higher than in the rest position, in a substantially continuous lowering movement in the direction of the rest position.

Dabei kann das Unwuchtantriebssystem dazu ausgebildet sein, bei Deaktivierung der Unwuchtanordnung die wenigstens eine Unwuchtmasse aus einer Auslenklage in die Ruhelage zu bewegen. Die wenigstens eine Unwuchtmasse wird also durch Betreiben des zugeordneten Unwucht-Elektroantriebsmotors zwischen zwei Stellungen, nämlich der Auslenklage einerseits und der Ruhelage andererseits, ohne Pendelbewegung in den Zustand geringerer bzw. minimaler potentieller Energie gebracht.In this case, the imbalance drive system can be designed to move the at least one imbalance mass from a deflected position into the rest position when the imbalance arrangement is deactivated. The at least one unbalanced mass is thus brought into the state of lower or minimal potential energy by operating the associated unbalanced electric drive motor between two positions, namely the deflection position on the one hand and the rest position on the other hand, without a pendulum movement.

In der Ruhelage kann der Massenschwerpunkt der wenigstens einen Unwuchtmasse in einer Vertikalrichtung im Wesentlichen vertikal unter der Unwuchtdrehachse positioniert sein, also den Zustand minimaler potentieller Energie einnehmen, während in der Auslenklage der Massenschwerpunkt der wenigstens einen Unwuchtmasse mit einem Auslenkwinkel aus der Ruhelage ausgelenkt sein kann.In the rest position, the center of mass of the at least one unbalanced mass can be positioned essentially vertically below the axis of rotation of the unbalanced mass in a vertical direction, i.e. assume the state of minimum potential energy, while in the deflection position the center of mass of the at least one unbalanced mass can be deflected at a deflection angle from the rest position.

Um am Beginn der Unwucht-Rückführphase eine definierte Bewegung der wenigstens einen Unwuchtmasse einleiten zu können, wird vorgeschlagen, dass das Unwuchtantriebssystem dazu ausgebildet ist, bei Deaktivierung der Unwuchtanordnung, insbesondere mit Beginn der Unwucht-Rückführphase, den wenigstens einen Unwucht-Elektroantriebsmotor zum Erzeugen eines Haltedrehmoments zu betreiben.In order to be able to initiate a defined movement of the at least one unbalanced mass at the beginning of the unbalanced return phase, it is proposed that the unbalanced drive system be designed to, upon deactivation of the Unbalanced arrangement, in particular at the beginning of the unbalanced return phase, to operate the at least one unbalanced electric drive motor to generate a holding torque.

Hierzu kann beispielsweise das Unwuchtantriebssystem dazu ausgebildet sein, zum Erzeugen des Haltedrehmoments einen Haltestrom durch den wenigstens einen Unwucht-Elektroantriebsmotor zu leiten.For this purpose, for example, the unbalanced drive system can be designed to conduct a holding current through the at least one unbalanced electric drive motor in order to generate the holding torque.

Um die wenigstens eine Unwuchtmasse, ausgehend von einem normalen Rotationsbetrieb, in einen Zustand zu überführen, in welchem in der Unwucht-Rückführphase diese ohne wesentliche Pendelbewegung zur Ruhelage zurückbewegt wird, kann das Unwuchtantriebssystem dazu ausgebildet sein, in einer der Unwucht-Rückführphase vorangehenden Unwucht-Bremsphase den Unwucht-Elektroantriebsmotor zum Erzeugen eines Bremsdrehmoments zum Senken einer Drehzahl der wenigstens einen Unwuchtmasse, ausgehend von einer Betriebsdrehzahl, zu betreiben. Insbesondere kann diese Unwucht-Bremsphase dazu dienen, die wenigstens eine Unwuchtmasse in die Auslenklage zu bewegen bzw. im Bereich der Auslenklage zu positionieren, so dass die wenigstens eine Unwuchtmasse in der Auslenklage im Wesentlichen zur Ruhe kommt.In order to convert the at least one unbalanced mass, starting from normal rotational operation, into a state in which, in the unbalanced return phase, it is moved back to the rest position without any significant oscillating movement, the unbalanced drive system can be designed to, in an unbalanced Braking phase to operate the unbalanced electric drive motor for generating a braking torque to reduce a speed of the at least one unbalanced mass, starting from an operating speed. In particular, this imbalance braking phase can serve to move the at least one imbalance mass into the deflection position or to position it in the area of the deflection position, so that the at least one imbalance mass in the deflection position essentially comes to rest.

Um die Unwucht-Bremsphase möglichst kurz zu halten, wird vorgeschlagen, dass das Bremsdrehmoment größer ist als das Haltedrehmoment. Beispielsweise kann das Bremsdrehmoment im Bereich des durch den Unwucht-Elektroantriebsmotor maximal erzeugbaren Bremsdrehmoments liegen.In order to keep the unbalanced braking phase as short as possible, it is proposed that the braking torque be greater than the holding torque. For example, the braking torque can be in the range of the maximum braking torque that can be generated by the unbalance electric drive motor.

Zum Einleiten der Unwucht-Rückführphase kann das Unwuchtantriebssystem dazu ausgebildet sein, bei Erreichen einer Übergangsdrehzahl oder/und dann, wenn seit Beginn der Unwucht-Bremsphase eine vorbestimmte Bremszeitdauer vergangen ist, den wenigstens einen Unwucht-Elektroantriebsmotor zum Erzeugen des Haltedrehmoments zu betreiben.To initiate the unbalance return phase, the unbalance drive system can be designed to operate the at least one unbalance electric drive motor to generate the holding torque when a transition speed is reached and/or when a predetermined braking time has elapsed since the start of the unbalance braking phase.

Die Übergangsdrehzahl kann beispielsweise bei Null liegen. Dies bedeutet, dass in der Unwucht-Bremsphase die wenigstens eine Unwuchtmasse praktisch zum Stillstand gebracht wird und am Ende der Unwucht-Bremsphase in der Auslenklage positioniert ist oder im Bereich der Auslenklage lediglich eine Bewegung mit sehr geringer Geschwindigkeit ausführt.The transition speed can be zero, for example. This means that in the unbalanced braking phase, the at least one unbalanced mass practically is brought to a standstill and is positioned in the deflection position at the end of the unbalance braking phase or only moves at a very low speed in the area of the deflection position.

Da im Allgemeinen nicht bekannt ist, in welcher Auslenklage am Ende der Unwucht-Bremsphase die wenigstens eine Unwuchtmasse zum Stillstand oder nahezu zum Stillstand gebracht wird, ist es vorteilhaft, wenn das Haltedrehmoment einem durch die wenigstens eine Unwuchtmasse bei Positionierung der wenigstens einen Unwuchtmasse bei einem Referenz-Auslenkwinkel generierten Drehmoment entspricht, wobei vorzugsweise der Referenz-Auslenkwinkel im Bereich von 90° bezüglich der Ruhelage liegt. Auf diese Art und Weise wird ein plötzliches Herabfallen der wenigstens einen Unwuchtmasse aufgrund eines zu geringen Haltedrehmoments verhindert.Since it is generally not known in which deflection position at the end of the unbalanced braking phase the at least one unbalanced mass is brought to a standstill or almost to a standstill, it is advantageous if the holding torque is exerted by the at least one unbalanced mass when the at least one unbalanced mass is positioned at a Corresponds to the reference deflection angle generated torque, the reference deflection angle preferably being in the range of 90° with respect to the rest position. In this way, the at least one unbalanced mass is prevented from suddenly falling down because the holding torque is too low.

Zum Bewegen der wenigstens einen Unwuchtmasse in der Unwucht-Rückführphase in die Ruhelage kann das Unwuchtantriebssystem dazu ausgebildet sein, bei in der Auslenklage positionierter wenigstens einer Unwuchtmasse den wenigstens einen Unwucht-Elektroantriebsmotor zum Senken des durch den wenigstens einen Unwucht-Elektroantriebsmotor erzeugten Drehmoments, ausgehend von dem Haltedrehmoment, zu betreiben.In order to move the at least one unbalanced mass into the rest position in the unbalanced return phase, the unbalanced drive system can be designed to, with at least one unbalanced mass positioned in the deflection position, use the at least one unbalanced electric drive motor to reduce the torque generated by the at least one unbalanced electric drive motor, starting from the holding torque.

Das Senken des Drehmoments, ausgehend von dem Haltedrehmoment, kann beispielsweise dadurch erreicht werden, das Unwuchtantriebssystem dazu ausgebildet ist, den durch den Unwucht-Elektroantriebsmotor geleiteten Strom, ausgehend von dem Haltestrom, zu senken.The lowering of the torque, starting from the holding torque, can be achieved, for example, by the unbalanced drive system being designed to lower the current conducted through the unbalanced electric drive motor, starting from the holding current.

Zur Erzeugung einer Vibrationsbewegung einer Bodenbearbeitungswalze kann die Unwuchtdrehachse wenigstens einer Unwuchtmasse, vorzugsweise jeder Unwuchtmasse, der Walzendrehachse entsprechen. Soll eine Bodenbearbeitungswalze in eine Oszillationsbewegung versetzt werden, kann alternativ oder zusätzlich vorgesehen sein, dass die Unwuchtdrehachse wenigstens einer Unwuchtmasse, vorzugsweise jeder Unwuchtmasse, zur Walzendrehachse versetzt und parallel angeordnet ist.To generate a vibratory movement of a soil tillage roller, the unbalanced axis of rotation can correspond to at least one unbalanced mass, preferably every unbalanced mass, of the roller axis of rotation. If a soil tillage roller is to be set into an oscillating movement, it can alternatively or additionally be provided that the unbalanced axis of rotation of at least one unbalanced mass, preferably each unbalanced mass, is offset and arranged parallel to the roller axis of rotation.

Die Erfindung betrifft ferner eine Bodenbearbeitungsmaschine, vorzugsweise Bodenverdichter, umfassend wenigstens eine erfindungsgemäß aufgebaute Bodenbearbeitungswalze.The invention also relates to a soil tillage machine, preferably a soil compactor, comprising at least one soil tillage roller constructed according to the invention.

Ferner wird die eingangs angegebene Aufgabe gelöst durch ein Verfahren zum Betreiben einer erfindungsgemäß aufgebauten Bodenbearbeitungswalze, vorzugsweise in einer erfindungsgemäß aufgebauten Bodenbearbeitungsmaschine, umfassend die Maßnahmen:

  1. a) bei Deaktivierung der Unwuchtanordnung, Senken der Drehzahl der wenigstens einen Unwuchtmasse in einer Unwucht-Bremsphase, ausgehend von einer Betriebsdrehzahl,
  2. b) in einer auf die Unwucht-Bremsphase folgenden Unwucht-Rückführphase, Erzeugen eines Haltedrehmoments durch den wenigstens einen Unwucht-Elektroantriebsmotor und Verringern des durch den Unwucht-Elektroantriebsmotor erzeugten Drehmoments, ausgehend von dem Haltedrehmoment, zum Bewegen der wenigstens einen Unwuchtmasse in die Ruhelage.
Furthermore, the object specified at the outset is achieved by a method for operating a soil tillage roller constructed according to the invention, preferably in a soil tillage machine constructed according to the invention, comprising the measures:
  1. a) upon deactivation of the unbalance arrangement, lowering the speed of the at least one unbalance mass in an unbalance braking phase, starting from an operating speed,
  2. b) in an unbalance return phase following the unbalance braking phase, generating a holding torque by the at least one unbalance electric drive motor and reducing the torque generated by the unbalance electric drive motor, starting from the holding torque, to move the at least one unbalance mass into the rest position.

Die Erfindung wird nachfolgend mit Bezug auf die beiliegenden Figuren detailliert beschrieben. Es zeigt:

Fig. 1
eine Seitenansicht einer als Bodenverdichter ausgebildeten Bodenbearbeitungsmaschine mit zwei Bodenbearbeitungswalzen;
Fig. 2
eine prinzipartige Darstellung einer Bodenbearbeitungswalze mit einer dieser zugeordneten Unwuchtanordnung.
The invention is described in detail below with reference to the attached figures. It shows:
1
a side view of a soil cultivating machine designed as a soil compactor with two soil cultivating rollers;
2
a schematic representation of a tillage roller with an unbalanced arrangement associated with it.

In Fig. 1 ist eine als Bodenverdichter ausgebildete Bodenbearbeitungsmaschine allgemein mit 10 bezeichnet. Die Bodenbearbeitungsmaschine 10 umfasst an einem Hinterwagen 12 eine um eine Walzendrehachse D1 drehbare Bodenbearbeitungswalze 14 mit einem einen Walzeninnenraum 16 umschließenden Walzenmantel 18. An einem in einem Gelenkverbindungsbereich 20 mit dem Hinterwagen 12 zum Lenken der Bodenbearbeitungsmaschine 10 gelenkig verbundenen Vorderwagen 22 weist die Bodenbearbeitungsmaschine 10 eine weitere Bodenbearbeitungswalze 24 mit einem von einem Walzenmantel 26 umschlossenen Walzeninnenraum 28 auf. Am Hinterwagen 12 ist ferner ein Bedienstand 30 vorgesehen, von welchem aus eine Bedienperson die Bodenbearbeitungsmaschine 10 bedienen kann, beispielsweise um diese über einen zu verdichtenden Boden, wie z. B. Asphaltmaterial, zu bewegen.In 1 a soil treatment machine designed as a soil compactor is generally denoted by 10 . The soil cultivating machine 10 comprises on a rear carriage 12 a soil cultivating roller 14 which can be rotated about a roller axis of rotation D 1 and has a roller jacket 18 enclosing a roller interior 16 Rear carriage 12 for steering the soil cultivating machine 10 articulated front carriage 22, the soil cultivating machine 10 has a further soil cultivating roller 24 with a roller interior 28 enclosed by a roller jacket 26. Also provided on the rear carriage 12 is a control station 30 from which an operator can operate the soil tillage machine 10, for example to move it over a soil to be compacted, such as. B. asphalt material to move.

Bei der Bodenbearbeitungsmaschine 10 können beide Bodenbearbeitungswalzen 14 zur Drehung um deren Walzendrehachsen D1, D2 angetrieben sein. Hierzu kann beispielsweise ein elektrohydraulisches Antriebssystem mit einer von einem Elektromotor angetriebenen Fahr-Hydraulikpumpe und in Zuordnung zu jeder Bodenbearbeitungswalze 14 einem Fahr-Hydraulikmotor vorgesehen sein.In the soil tillage machine 10, both soil tillage rollers 14 can be driven to rotate about their roller axes of rotation D 1 , D 2 . For this purpose, for example, an electrohydraulic drive system with a hydraulic drive pump driven by an electric motor and a hydraulic drive motor assigned to each soil tillage roller 14 can be provided.

Ferner kann in Zuordnung zu zumindest einer Bodenbearbeitungswalze, vorzugsweise beiden Bodenbearbeitungswalzen, jeweils eine in Fig. 1 anhand einer Strichlinie prinzipartig dargestellte Unwuchtanordnung 32, 34 vorgesehen sein. Der Aufbau und die Wirkungsweise einer derartigen Unwuchtanordnung werden anhand der der Bodenbearbeitungswalze 14 des Hinterwagens 12 zugeordneten Unwuchtanordnung 32 nachfolgend detailliert beschrieben. Es ist darauf hinzuweisen, dass dann, wenn bei beiden Bodenbearbeitungswalzen 14, 24 derartige Unwuchtanordnungen 32 bzw. 34 vorgesehen sind, diese zueinander gleich aufgebaut sein können und in gleicher Art und Weise betrieben werden können.Furthermore, in association with at least one soil tillage roller, preferably both soil tillage rollers, one in 1 imbalance arrangement 32, 34 shown in principle by means of a dashed line. The structure and mode of operation of such an unbalanced arrangement are described in detail below with reference to the unbalanced arrangement 32 assigned to the soil tillage roller 14 of the rear carriage 12 . It should be pointed out that if such unbalance arrangements 32 or 34 are provided for both soil tillage rollers 14, 24, they can be constructed identically to one another and can be operated in the same way.

Die der Bodenbearbeitungswalze 14 zugeordnete Unwuchtanordnung 32 umfasst zumindest eine um eine im dargestellten Beispiel der Walzendrehachse D1 entsprechende Unwuchtdrehachse U zur Drehung antreibbare Unwuchtmasse 36 mit zur Unwuchtdrehachse U exzentrischem Massenschwerpunkt M. Es ist darauf hinzuweisen, dass in Fig. 2 die Unwuchtmasse 36 in zwei nachfolgend noch erläuterten Drehlagen um die Unwuchtdrehachse U positioniert gezeigt ist. Weiter ist darauf hinzuweisen, dass beispielsweise mehrere derartige Unwuchtmassen 36 in Richtung der Unwuchtdrehachse U aufeinander folgend im Walzeninnenraum 16 angeordnet sein können.The unbalance arrangement 32 assigned to the soil tillage roller 14 comprises at least one unbalance mass 36 that can be driven to rotate about an unbalance axis of rotation U that corresponds to the roller axis of rotation D 1 in the example shown and that has a center of mass M that is eccentric to the unbalance axis of rotation U. It should be pointed out that in 2 the unbalanced mass 36 is shown positioned in two rotational positions about the unbalanced axis of rotation U, which will be explained below. It should also be pointed out that, for example, several such imbalance masses 36 in Direction of the unbalance axis of rotation U can be arranged in succession in the roll interior 16.

Der Unwuchtmasse 36 ist ein beispielsweise ebenfalls im Walzeninnenraum 16 angeordneter Unwucht-Elektroantriebsmotor 38 zugeordnet. Dieser kann aus einer am Bodenverdichter 10 vorgesehenen Batterie, einer Brennstoffzelle oder dergleichen gespeist werden und im Bodenbearbeitungsbetrieb, also beispielsweise beim Verdichten von Asphaltmaterial oder dergleichen, die zugeordnete Unwuchtmasse 36 zur Drehung um die Unwuchtdrehachse U antreiben. Es ist in diesem Zusammenhang darauf hinzuweisen, dass der Unwucht-Elektroantriebsmotor 38 dazu vorgesehen sein kann, mehrere beispielsweise in Richtung der Unwuchtdrehachse U aufeinander folgend angeordnete Unwuchtmassen 36 anzutreiben. Alternativ könnte dann, wenn mehrere derartige Unwuchtmassen 36 vorgesehen sind, in Zuordnung zu jeder derartigen Unwuchtmasse 36 ein separater, diese antreibender Unwucht-Elektroantriebsmotor 38 vorgesehen sein. Der Unwucht-Elektroantriebsmotor 38 ist vorzugsweise ein Drei-Phasen-Elektromotor, welcher unter der Ansteuerung eines Inverters steht und zur Rotation mit einer Soll-Drehzahl bzw. einem Soll-Drehmoment vermittels des Inverters mit der jeweils erforderlichen Spannung bzw. dem jeweils erforderlichen Strom gespeist wird.The unbalanced mass 36 is associated with an unbalanced electric drive motor 38 , for example also arranged in the roller interior 16 . This can be fed from a battery, a fuel cell or the like provided on the soil compactor 10 and can drive the associated unbalanced mass 36 to rotate about the unbalanced axis of rotation U during soil processing operation, for example when compacting asphalt material or the like. In this context, it should be pointed out that the unbalanced electric drive motor 38 can be provided to drive a plurality of unbalanced masses 36 arranged one after the other in the direction of the unbalanced axis of rotation U, for example. Alternatively, if a plurality of such unbalanced masses 36 are provided, a separate unbalanced electric drive motor 38 driving this could be provided in association with each such unbalanced mass 36 . The unbalanced electric drive motor 38 is preferably a three-phase electric motor which is controlled by an inverter and is supplied with the required voltage or current by means of the inverter for rotation at a desired speed or a desired torque becomes.

Im Betrieb der Bodenbearbeitungsmaschine 10 und bei aktivierter, also in Betrieb versetzter Unwuchtanordnung 32 treibt der Unwucht-Elektroantriebsmotor 38 die Unwuchtmasse 36 zur Drehung um die Unwuchtdrehachse U mit bis zu mehreren tausend Umdrehungen pro Minute an. Dadurch wird eine bezüglich der Walzendrehachse D1 im Wesentlichen orthogonale Kraft auf die Bodenbearbeitungswalze 14 ausgeübt und diese in eine periodische Vibrationsbewegung versetzt.During operation of the soil cultivation machine 10 and with the unbalance arrangement 32 activated, ie put into operation, the unbalance electric drive motor 38 drives the unbalance mass 36 to rotate about the unbalance axis of rotation U at up to several thousand revolutions per minute. As a result, a force that is essentially orthogonal with respect to the roller axis of rotation D 1 is exerted on the soil tillage roller 14 and sets it in a periodic vibrating motion.

Soll der Betrieb der Unwuchtanordnung 32 beendet werden, diese also deaktiviert werden, wird zunächst beispielsweise mit Beginn der Deaktivierung in einer Unwucht-Bremsphase die Drehzahl der Unwuchtmasse 36 um die Unwuchtdrehachse U gesenkt. Hierzu kann beispielsweise der Unwucht-Elektroantriebsmotor 38 als Generator betrieben werden, um aus der abnehmenden kinetischen Energie der Unwuchtmasse 36 elektrische Energie zu gewinnen und diese in einen Energiespeicher, also beispielsweise eine an der Bodenbearbeitungsmaschine 10 vorgesehene Batterie, zu speisen. Alternativ kann der Unwucht-Elektroantriebsmotor 38 in einem Bremsbetrieb betrieben werden, in welchem durch Bestromung desselben ein der Rotation der Unwuchtmasse 36 entgegenwirkendes Bremsdrehmoment erzeugt wird. Grundsätzlich könnte auch in verschiedenen Teilphasen der Unwucht-Bremsphase der Unwucht-Elektroantriebsmotor 38 im Generatorbetrieb bzw. im Bremsbetrieb betrieben werden. Um die Unwucht-Bremsphase möglichst kurz zu halten, kann in der Unwucht-Bremsphase der Unwucht-Elektroantriebsmotor 38 beispielsweise zum Erzeugen eines maximal möglichen Bremsdrehmoments angesteuert werden, unter der weiteren Vorgabe, dass als Soll-Drehzahl eine Drehzahl im Bereich von Null zu erreichen ist.If the operation of the unbalanced arrangement 32 is to be terminated, ie if it is deactivated, the rotational speed of the unbalanced mass 36 about the unbalanced axis of rotation U is first reduced, for example at the beginning of the deactivation in an unbalanced braking phase. For this purpose, for example, the unbalanced electric drive motor 38 can be operated as a generator in order to get out of the decreasing kinetic energy of the unbalanced mass 36 to gain electrical energy and feed it into an energy store, for example a battery provided on the tillage machine 10 . Alternatively, the unbalanced electric drive motor 38 can be operated in a braking mode, in which a braking torque counteracting the rotation of the unbalanced mass 36 is generated by energizing it. In principle, the unbalanced electric drive motor 38 could also be operated in generator mode or in braking mode in different partial phases of the unbalanced braking phase. In order to keep the unbalanced braking phase as short as possible, the unbalanced electric drive motor 38 can be controlled in the unbalanced braking phase, for example to generate a maximum possible braking torque, with the further requirement that a speed in the region of zero is to be achieved as the setpoint speed .

Am Ende der Unwucht-Bremsphase, also bei Erreichen einer Übergangsdrehzahl im Bereich von Null, ist die Unwuchtmasse 36 in einer grundsätzlich nicht bekannten Auslenklage. Die Unwuchtmasse 36 bzw. deren Massenschwerpunkt könnte in einer in Fig. 2 unten veranschaulichten Ruhelage sein, in welcher der Massenschwerpunkt M der Unwuchtmasse 36 im Wesentlichen vertikal unter der Walzendrehachse D1 positioniert ist. Im Allgemeinen wird jedoch die Unwuchtmasse 36 am Ende der Unwucht-Bremsphase in einer der Ruhelage nicht entsprechenden Auslenklage positioniert sein und würde bei fortgesetzter Ansteuerung des Unwucht-Elektroantriebsmotors 38 unter der Vorgabe, dass die Soll-Drehzahl der Unwuchtmasse 36 Null sein soll, in dieser Auslenklage gehalten werden.At the end of the unbalanced braking phase, ie when a transition speed in the region of zero is reached, the unbalanced mass 36 is in a fundamentally unknown deflection position. The unbalanced mass 36 or its center of mass could be in an 2 rest position illustrated below, in which the center of mass M of the unbalanced mass 36 is positioned essentially vertically under the roller axis of rotation D 1 . In general, however, the unbalanced mass 36 will be positioned at the end of the unbalanced braking phase in a deflection position that does not correspond to the rest position and would be in this position if the unbalanced electric drive motor 38 was activated further with the specification that the target speed of the unbalanced mass 36 should be zero deflection position are held.

Bei der durch den Unwucht-Elektroantriebsmotor 38 zur Drehung angetriebenen Unwuchtmasse 36 liegt beispielsweise aus der Ansteuerung des Unwucht-Elektroantriebsmotors 38 oder bereitgestellt durch einen Drehzahlsensor im Allgemeinen Information über die momentane Drehzahl der Unwuchtmasse 36 bzw. des Unwucht-Elektroantriebsmotors 38 vor. Erreicht die ausgehend von der Betriebsdrehzahl gesenkte Drehzahl der Unwuchtmasse 36 die Übergangsdrehzahl, die beispielsweise der für die Unwucht-Bremsphase vorgegebenen Soll-Drehzahl im Bereich von Null entsprechen kann, oder ist seit Beginn der Unwucht-Bremsphase eine ausreichend lange Zeitdauer vergangen, welche sicherstellt, dass die Unwuchtmasse 36 in einer der Ruhelage nicht entsprechenden Auslenklage zur Ruhe gekommen ist, geht ein beispielsweise den Unwucht-Elektroantriebsmotor 38 und eine zugeordnete Ansteuereinheit umfassendes Unwuchtantriebssystem 40 in eine Unwucht-Rückführphase über, um ein Rückschwingen und Auspendeln der Unwuchtmasse 36 zu vermeiden. Würde in einem derartigen Zustand bei zunächst in einer Auslenklage gehaltener Unwuchtmasse 36 der Unwucht-Elektroantriebsmotor 38 vollständig deaktiviert, also stromlos geschaltet werden, würde die Unwuchtmasse eine Pendelbewegung um die Unwuchtdrehachse U ausführen, also sich nicht mehr über einen oberen Totpunkt der Kreisbewegung hinweg bewegen. Diese Pendelbewegung würde mit abnehmender Amplitude andauern, bis die Unwuchtmasse 36 die in Fig. 2 unten dargestellte Positionierung einnimmt, in welcher der Massenschwerpunkt M der Unwuchtmasse 36 in Richtung einer Vertikallinie V, also in Schwerkraftrichtung, direkt, also vertikal unter der Unwuchtdrehachse U positioniert ist. In dieser der Ruhelage der Unwuchtmasse 36 entsprechenden Positionierung ist bzw. verbleibt die Unwuchtmasse 36 auch bei deaktivierter Unwuchtanordnung 32 bzw. deaktiviertem Unwuchtantriebssystem 40.In the case of the unbalanced mass 36 driven to rotate by the unbalanced electric drive motor 38, information about the instantaneous speed of the unbalanced mass 36 or the unbalanced electric drive motor 38 is generally available, for example from the activation of the unbalanced electric drive motor 38 or provided by a speed sensor. If the speed of the unbalanced mass 36, which has been reduced starting from the operating speed, reaches the transition speed, which can for example correspond to the setpoint speed specified for the unbalanced braking phase in the region of zero, or has been since the beginning of the unbalanced braking phase a sufficiently long period of time has elapsed, which ensures that the unbalanced mass 36 has come to rest in a deflection position that does not correspond to the resting position, an unbalanced drive system 40 comprising, for example, the unbalanced electric drive motor 38 and an associated control unit goes into an unbalanced return phase in order to prevent oscillation and to avoid the unbalanced mass 36 swinging out. If the unbalanced electric drive motor 38 were completely deactivated in such a state, with the unbalanced mass 36 initially held in a deflected position, i.e. switched off, the unbalanced mass would execute a pendulum movement about the unbalanced axis of rotation U, i.e. no longer move past a top dead center of the circular movement. This pendulum movement would continue with decreasing amplitude until the unbalanced mass 36 in 2 occupies the positioning shown below, in which the center of gravity M of the unbalanced mass 36 is positioned directly, ie vertically below the axis of rotation U of the unbalanced mass, in the direction of a vertical line V, ie in the direction of gravity. The unbalanced mass 36 is or remains in this position, which corresponds to the rest position of the unbalanced mass 36, even when the unbalanced arrangement 32 or the unbalanced drive system 40 is deactivated.

Um diese zu spürbaren Schwingungen an der Bodenbearbeitungsmaschine 10 führende Auspendelbewegung der Unwuchtmasse 36 zu vermeiden, wird der Unwucht-Elektroantriebsmotor 38 beim Übergang in die Unwucht-Rückführphase derart bestromt, dass dieser ein definiertes Haltedrehmoment erzeugt. Das Haltedrehmoment ist grundsätzlich kleiner als das in der Unwucht-Bremsphase erzeugte bzw. erzeugbare maximale Bremsdrehmoment und ist beispielsweise derart festgelegt, dass grundsätzlich bei durch den Unwucht-Elektroantriebsmotor 38 erzeugtem Haltedrehmoment die Unwuchtmasse 36 in der aus der Ruhelage ausgelenkten Auslenklage positioniert bleibt bzw. gehalten werden kann. Hierzu kann beispielsweise vorgesehen sein, dass als Haltedrehmoment ein Drehmoment erzeugt wird, welches so groß ist, dass auch dann, wenn die Auslenklage mit einen Referenz-Auslenkwinkel bezüglich der Ruhelage von 90° aufweist, die Unwuchtmasse 26 sich nicht in Richtung zur Ruhelage bewegen wird.. In dieser Auslenklage ist die Unwuchtmasse 36 derart positioniert, dass der Massenschwerpunkt M derselben auf einer die Unwuchtdrehachse U schneidenden Horizontallinie H liegt. Dies ist ein Zustand, in welchem aufgrund eines maximalen effektiven Hebels E zwischen der Unwuchtdrehachse U und dem Massenschwerpunkt M im Schwerkraftfeld die Unwuchtmasse 36 ein maximales und dem Haltedrehmoment entgegenwirkendes bzw. entsprechendes Drehmoment generiert.In order to avoid this swinging motion of the unbalanced mass 36 leading to perceptible vibrations on the soil treatment machine 10, the unbalanced electric drive motor 38 is energized during the transition to the unbalanced return phase in such a way that it generates a defined holding torque. The holding torque is generally smaller than the maximum braking torque generated or that can be generated in the unbalanced braking phase and is defined, for example, in such a way that, when the holding torque is generated by the unbalanced electric drive motor 38, the unbalanced mass 36 remains or is held in the deflected position deflected from the rest position can be. For this purpose, it can be provided, for example, that a torque is generated as the holding torque, which is so large that even if the deflection position has a reference deflection angle of 90° with respect to the rest position, the unbalanced mass 26 will not move in the direction of the rest position .. In this deflection position, the unbalanced mass 36 is positioned in such a way that the center of mass M of the same intersects the unbalanced axis of rotation U horizontal line H lies. This is a state in which, due to a maximum effective lever E between the unbalanced axis of rotation U and the center of mass M in the gravitational field, the unbalanced mass 36 generates a maximum torque counteracting or corresponding to the holding torque.

Erzeugt der Unwucht-Elektroantriebsmotor 38 am Beginn der Unwucht-Rückführphase ein derartiges Haltedrehmoment, wird zunächst die Unwuchtmasse in der Auslenklage verbleiben. Ausgehend von diesem Zustand wird in der Unwucht-Rückführphase dann das vom Unwucht-Antriebselektromotor 38 generierte Drehmoment, ausgehend vom Haltedrehmoment, allmählich gesenkt. Dies erfolgt durch Senken des durch den Unwucht-Elektroantriebsmotor 38 geleiteten elektrischen Stroms. Aufgrund des beispielsweise linear gesenkten Drehmoments bzw. Stroms wird die Unwuchtmasse 36 sich, ausgehend von der zunächst eingenommenen Auslenklage, allmählich nach unten in Richtung zur Ruhelage bewegen und diese dann, wenn das vom Unwucht-Elektroantriebsmotor 38 erzeugte Drehmoment auf einen Wert von Null gesenkt worden ist, in der Ruhelage sein.If the unbalanced electric drive motor 38 generates such a holding torque at the beginning of the unbalanced return phase, the unbalanced mass will initially remain in the deflected position. Starting from this state, the torque generated by the unbalance drive electric motor 38, starting from the holding torque, is then gradually reduced in the unbalance return phase. This is done by lowering the electrical current passed through the unbalanced electric drive motor 38 . Due to the linearly reduced torque or current, for example, the unbalanced mass 36 will, starting from the deflection position initially assumed, gradually move downwards towards the rest position and this will then occur when the torque generated by the unbalanced electric drive motor 38 has been reduced to a value of zero is to be at rest.

Beim Absenken des vom Unwucht-Elektroantriebsmotor 38 bereitgestellten Drehmoments von dem Haltedrehmoment auf einen Wert von Null wird die Unwuchtmasse 36 ohne Pendelbewegung allmählich und im Wesentlichen kontinuierlich in die Ruhelage zurückgeführt, so dass im Wesentlichen kein Überschwingen bzw. kein Bewegen über die Ruhelage hinaus stattfindet. Die Unwuchtmasse 36 wird also ohne an der Bodenbearbeitungsmaschine 10 wahrnehmbare Pendelbewegung in die Ruhelage zurückgeführt. Ist dieser Zustand erreicht, wird der Betrieb des Unwuchtantriebssystems 40 eingestellt bzw. der Unwucht-Elektroantriebsmotor 38 nicht mehr mit einer Spannung beaufschlagt, so dass dieser stromlos ist und kein auf die Unwuchtmasse 36 einwirkendes Drehmoment erzeugt. Die Unwuchtmasse 36 wird schwerkraftbedingt in ihrer Ruhelage verbleiben, in welcher diese bzw. deren Massenschwerpunkt M die Lage minimaler potentieller Energie einnimmt.When the torque provided by the unbalanced electric drive motor 38 is reduced from the holding torque to a value of zero, the unbalanced mass 36 is gradually and essentially continuously returned to the rest position without oscillating movement, so that essentially no overshoot or movement beyond the rest position takes place. The unbalanced mass 36 is therefore returned to the rest position without a perceptible pendulum movement on the soil treatment machine 10 . If this state is reached, the operation of the unbalanced drive system 40 is stopped or the unbalanced electric drive motor 38 is no longer subjected to a voltage, so that it is de-energized and does not generate any torque acting on the unbalanced mass 36 . Due to the force of gravity, the unbalanced mass 36 will remain in its rest position, in which it or its center of mass M assumes the position of minimum potential energy.

Von besonderem Vorteil ist bei der erfindungsgemäßen Ausgestaltung einer Bodenbearbeitungswalze 14 bzw. 24, dass das Überführen einer Unwuchtmasse 36 in eine Ruhelage unabhängig davon erfolgen kann, ob die Bodenbearbeitungsmaschine 10 auf einem im Schwerkraftfeld horizontal orientierten Boden oder auf einem geneigten Boden steht. Die Unwuchtmasse 36 wird in der Ruhelage und bei deaktiviertem Unwucht-Elektroantriebsmotor 38 immer den Zustand geringster potentieller Energie einnehmen, in welchem deren Massenschwerpunkt M vertikal, also in Schwerkraftrichtung unter der Unwuchtdrehachse U positioniert ist. Es ist keine Sensorik erforderlich, um Information über die Neigung des Bodens, auf welchem die Bodenbearbeitungsmaschine 10 sich befindet, bereitzustellen.A particular advantage of the configuration of a soil tillage roller 14 or 24 according to the invention is that the transfer of an unbalanced mass 36 to a rest position can take place regardless of whether the soil tillage machine 10 is standing on a ground that is oriented horizontally in the gravitational field or on an inclined ground. In the rest position and with the unbalanced electric drive motor 38 deactivated, the unbalanced mass 36 will always assume the state of lowest potential energy, in which its center of mass M is positioned vertically, ie in the direction of gravity below the axis of rotation U of the unbalanced mass. No sensors are required to provide information about the slope of the ground on which the soil treatment machine 10 is located.

Abschließend ist darauf hinzuweisen, dass bei einer erfindungsgemäß aufgebauten Bodenbearbeitungswalze 14, 24 bzw. einem Verfahren zum Betreiben derselben das durch den Unwucht-Elektroantriebsmotor 38 zu erzeugende Haltedrehmoment beispielsweise auch kleiner sein kann, als das zum Halten einer Unwuchtmasse 36 in dem in Fig. 2 veranschaulichten Zustand mit maximalem durch diese generiertem Drehmoment erforderliche Haltedrehmoment. Dadurch kann die Zeitdauer der Unwucht-Rückführphase verkürzt werden. Grundsätzlich kann die Zeitdauer der Unwucht-Rückführphase auch dadurch verkürzt werden, dass, beispielsweise abweichend von einem linearen Senken des Drehmoments, ausgehend vom Haltedrehmoment, zunächst am Beginn der Unwucht-Rückführphase das Drehmoment bzw. der durch den Unwucht-Elektroantriebsmotor 38 geleitete Strom schneller gesenkt wird, als am Ende der Unwucht-Rückführphase. Grundsätzlich kann es in der Unwucht-Rückführphase auch Phasen geben, in welchen vorübergehend das vom Unwucht-Elektroantriebsmotor 38 bereitgestellte Drehmoment auf Null bzw. einen Wert im Bereich von Null gesenkt wird, um auf diese Art und Weise vorübergehend eine schnellere Annäherung der Unwuchtmasse 36 an die Ruhelage zu erreichen.Finally, it should be pointed out that in the case of a soil tillage roller 14, 24 constructed according to the invention or a method for operating the same, the holding torque to be generated by the unbalanced electric drive motor 38 can also be smaller, for example, than that for holding an unbalanced mass 36 in the 2 illustrated state with maximum torque generated by this holding torque required. As a result, the time duration of the imbalance recovery phase can be shortened. In principle, the duration of the unbalance return phase can also be shortened by, for example, deviating from a linear reduction in the torque, starting from the holding torque, by first reducing the torque or the current conducted through the unbalance electric drive motor 38 more quickly at the beginning of the unbalance return phase than at the end of the unbalance recovery phase. In principle, there can also be phases in the unbalance return phase in which the torque provided by the unbalance electric drive motor 38 is temporarily reduced to zero or a value in the vicinity of zero in order to temporarily allow the unbalance mass 36 to approach more quickly in this way to reach the rest position.

Weiter ist darauf hinzuweisen, dass das Haltedrehmoment am Beginn der Unwucht-Rückführphase in der derjenigen Richtung um die Unwuchtdrehachse U erzeugt wird, welche sicherstellt, dass die Unwuchtmasse 36 nicht in die Ruhelage zurückfällt bzw. in Richtung zur Ruhelage beschleunigt wird. Bei Positionierung der Unwuchtmasse 36 in der in Fig. 2 dargestellten Auslenklage wird daher das Haltedrehmoment im Uhrzeigersinn erzeugt. Wäre die Unwuchtmasse 36 in Fig. 2 rechts von der Unwuchtdrehachse U positioniert, würde das Haltedrehmoment im Gegenuhrzeigersinn erzeugt werden.It should also be pointed out that the holding torque at the beginning of the unbalance return phase is generated in that direction about the unbalance axis of rotation U, which ensures that the unbalance mass 36 does not fall back into the rest position or is accelerated towards the rest position. When positioning the unbalanced mass 36 in the in 2 the deflection position shown, the holding torque is therefore generated in a clockwise direction. If the imbalance mass were 36 in 2 positioned to the right of the unbalance axis of rotation U, the holding torque would be generated counterclockwise.

Abschließend ist weiter darauf hinzuweisen, dass die Prinzipien der vorliegenden Erfindung nicht nur bei einer zur Erzeugung einer Vibrationsbewegung vorgesehenen Unwuchtanordnung Anwendung finden können, sondern beispielsweise auch bei einer Unwuchtanordnung, bei welcher beispielsweise zwei Unwuchtmassen mit zur Walzendrehachse versetzter und paralleler Unwuchtdrehachse beispielsweise einander bezüglich der Walzendrehachse diametral gegenüberliegend angeordnet sind. Auch bei derartigen zur Walzendrehachse exzentrischen Unwuchtdrehachsen werden bei nicht aktiviertem Unwucht-Elektroantriebsmotor bzw. nicht aktivierten Unwucht-Elektroantriebsmotoren die Unwuchtmassen sich im Zustand minimaler potentieller Energie positionieren. Auch bei derartigen Anordnungen kann zum Vermeiden einer Auspendelbewegung der Unwuchtmassen in der vorangehend beschriebenen Art und Weise vorgegangen werden.Finally, it should also be pointed out that the principles of the present invention can be used not only in an unbalanced arrangement intended to generate a vibrating movement, but also, for example, in an unbalanced arrangement in which, for example, two unbalanced masses with an unbalanced rotational axis that is offset and parallel to the rotational axis of the roll, for example, are mutually offset with respect to the rotational axis of the roll are arranged diametrically opposite. Even with unbalanced rotary axes of this type that are eccentric to the axis of rotation of the roller, the unbalanced masses will position themselves in the state of minimum potential energy when the unbalanced electric drive motor or unbalanced electric drive motors are not activated. In such arrangements, too, the procedure described above can be used to avoid a swinging motion of the unbalanced masses.

Claims (16)

Bodenbearbeitungswalze für eine Bodenbearbeitungsmaschine, insbesondere Bodenverdichter, umfassend einen in Richtung einer Walzendrehachse (D1, D2) langgestreckten, einen Walzeninnenraum (16, 28) umgebenden Walzenmantel (18, 26) und eine wenigstens teilweise in dem Walzeninnenraum (16, 28) angeordnete Unwuchtanordnung (32, 34), wobei die Unwuchtanordnung (32, 34) wenigstens eine um eine Unwuchtdrehachse (U) drehbare Unwuchtmasse (36) mit zur Unwuchtdrehachse (U) exzentrischem Massenschwerpunkt (M) und ein Unwuchtantriebssystem (40) mit wenigstens einem Unwucht-Elektroantriebsmotor (38) zum Antreiben der wenigstens einen Unwuchtmasse (36) zur Drehung um die Unwuchtdrehachse (U) umfasst, wobei bei deaktivierter Unwuchtanordnung (32, 34) die wenigstens eine Unwuchtmasse (36) im Wesentlichen in einer Ruhelage ist, wobei das Unwuchtantriebssystem (40) dazu ausgebildet ist, bei Deaktivierung der Unwuchtanordnung (32, 34) in einer Unwucht-Rückführphase den wenigstens einen Unwucht-Elektroantriebsmotor (38) derart zu betreiben, dass die wenigstens eine Unwuchtmasse (36) in die Ruhelage bewegt wird.Soil tillage roller for a soil tillage machine, in particular a soil compactor, comprising a roller shell (18, 26) which is elongated in the direction of a roller axis of rotation (D 1 , D 2 ), surrounds a roller interior (16, 28) and is arranged at least partially in the roller interior (16, 28). Unbalanced arrangement (32, 34), wherein the unbalanced arrangement (32, 34) has at least one unbalanced mass (36) rotatable about an unbalanced axis of rotation (U) with a center of mass (M) eccentric to the unbalanced axis of rotation (U) and an unbalanced drive system (40) with at least one unbalanced Electric drive motor (38) for driving the at least one unbalanced mass (36) to rotate about the unbalanced axis of rotation (U), wherein when the unbalanced arrangement (32, 34) is deactivated, the at least one unbalanced mass (36) is essentially in a rest position, the unbalanced drive system ( 40) is designed to operate the at least one unbalance electric drive motor (38) when the unbalance arrangement (32, 34) is deactivated in an unbalance return phase in such a way that the at least one unbalance mass (36) is moved into the rest position. Bodenbearbeitungswalze nach Anspruch 1,
dadurch gekennzeichnet, dass das Unwuchtantriebssystem (40) dazu ausgebildet ist, die wenigstens eine Unwuchtmasse (36) in der Unwucht-Rückführphase aus einer Auslenklage in die Ruhelage zu bewegen.Soil tillage roller according to claim 1,
characterized in that the unbalance drive system (40) is designed to move the at least one unbalance mass (36) in the unbalance return phase from a deflected position to the rest position. Bodenbearbeitungswalze nach Anspruch 2,
dadurch gekennzeichnet, dass in der Ruhelage der Massenschwerpunkt (M) der wenigstens einen Unwuchtmasse (36) in einer Vertikalrichtung im Wesentlichen vertikal unter der Unwuchtdrehachse (U) positioniert ist, und dass in der Auslenklage der Massenschwerpunkt (M) der wenigstens einen Unwuchtmasse (36) mit einem Auslenkwinkel aus der Ruhelage ausgelenkt ist.Soil tillage roller according to claim 2,
characterized in that in the rest position the center of mass (M) of the at least one unbalanced mass (36) is positioned in a vertical direction essentially vertically below the axis of rotation (U) of the unbalanced mass, and in that in the deflection position the center of mass (M) of the at least one unbalanced mass (36 ) is deflected with a deflection angle from the rest position. Bodenbearbeitungswalze nach einem der Ansprüche 1-3,
dadurch gekennzeichnet, dass das Unwuchtantriebssystem (40) dazu ausgebildet ist, bei Deaktivierung der Unwuchtanordnung (32, 34) den wenigstens einen Unwucht-Elektroantriebsmotor (38) zum Erzeugen eines Haltedrehmoments zu betreiben.Soil tillage roller according to one of claims 1-3,
characterized in that the imbalance drive system (40) is designed to operate the at least one imbalance electric drive motor (38) to generate a holding torque when the imbalance arrangement (32, 34) is deactivated. Bodenbearbeitungswalze nach Anspruch 4,
dadurch gekennzeichnet, dass das Unwuchtantriebssystem (40) dazu ausgebildet ist, zum Erzeugen des Haltedrehmoments einen Haltestrom durch den wenigstens einen Unwucht-Elektroantriebsmotor (38) zu leiten.Soil tillage roller according to claim 4,
characterized in that the unbalanced drive system (40) is designed to conduct a holding current through the at least one unbalanced electric drive motor (38) in order to generate the holding torque. Bodenbearbeitungswalze nach einem der Ansprüche 1-5,
dadurch gekennzeichnet, dass das Unwuchtantriebssystem (40) dazu ausgebildet ist, in einer der Unwucht-Rückführphase vorangehenden Unwucht-Bremsphase den Unwucht-Elektroantriebsmotor (38) zum Erzeugen eines Bremsdrehmoments zum Senken einer Drehzahl der wenigstens einen Unwuchtmasse (36), ausgehend von einer Betriebsdrehzahl, zu betreiben.Soil tillage roller according to one of claims 1-5,
characterized in that the unbalance drive system (40) is designed to, in an unbalance braking phase preceding the unbalance return phase, use the unbalance electric drive motor (38) to generate a braking torque to reduce a speed of the at least one unbalance mass (36), starting from an operating speed , to operate. Bodenbearbeitungswalze nach Anspruch 6, sofern auf Anspruch 4 rückbezogen,
dadurch gekennzeichnet, dass das Bremsdrehmoment größer ist als das Haltedrehmoment.Ground working roller according to claim 6, if dependent on claim 4,
characterized in that the braking torque is greater than the holding torque. Bodenbearbeitungswalze nach Anspruch 6 oder 7, sofern auf Anspruch 4 rückbezogen,
dadurch gekennzeichnet, dass das Unwuchtantriebssystem (40) dazu ausgebildet ist, bei Erreichen einer Übergangsdrehzahl oder/und dann, wenn seit Beginn der Unwucht-Bremsphase eine vorbestimmte Bremszeitdauer vergangen ist, den wenigstens einen Unwucht-Elektroantriebsmotor (38) zum Erzeugen des Haltedrehmoments zu betreiben.Ground working roller according to claim 6 or 7, if dependent on claim 4,
characterized in that the imbalance drive system (40) is designed to operate the at least one imbalance electric drive motor (38) to generate the holding torque when a transition speed is reached and/or when a predetermined braking time has elapsed since the start of the imbalance braking phase . Bodenbearbeitungswalze nach Anspruch 8,
dadurch gekennzeichnet, dass das die Übergangsdrehzahl bei Null liegt.Soil tillage roller according to claim 8,
characterized in that the transition speed is zero. Bodenbearbeitungswalze nach einem der Ansprüche 4-9,
dadurch gekennzeichnet, dass das Haltedrehmoment einem durch die wenigstens eine Unwuchtmasse bei Positionierung der wenigstens einen Unwuchtmasse bei einem Referenz-Auslenkwinkel generierten Drehmoment entspricht.Soil tillage roller according to one of claims 4-9,
characterized in that the holding torque corresponds to a torque generated by the at least one unbalanced mass when the at least one unbalanced mass is positioned at a reference deflection angle. Bodenbearbeitungswalze nach Anspruch 3 und Anspruch 10,
dadurch gekennzeichnet, dass der Referenz-Auslenkwinkel im Bereich von 90° bezüglich der Ruhelage liegt.Ground working roller according to claim 3 and claim 10,
characterized in that the reference deflection angle is in the range of 90° with respect to the rest position. Bodenbearbeitungswalze nach Anspruch 2 und einem der Ansprüche 4-9, dadurch gekennzeichnet, dass das Unwuchtantriebssystem (40) dazu ausgebildet ist, bei in der Auslenklage positionierter wenigstens einer Unwuchtmasse (36) den wenigstens einen Unwucht-Elektroantriebsmotor (38) zum Senken des durch den wenigstens einen Unwucht-Elektroantriebsmotor (38) erzeugten Drehmoments, ausgehend von dem Haltedrehmoment, zum Bewegen der wenigstens einen Unwuchtmasse (36) aus der Auslenklage in die Ruhelage zu betreiben.Floor tillage roller according to Claim 2 and one of Claims 4-9, characterized in that the unbalanced drive system (40) is designed to, when at least one unbalanced mass (36) is positioned in the deflection position, use the at least one unbalanced electric drive motor (38) to lower the to operate at least one unbalance electric drive motor (38) of torque generated, starting from the holding torque, for moving the at least one unbalance mass (36) from the deflected position to the rest position. Bodenbearbeitungswalze nach Anspruch 5 und Anspruch 12,
dadurch gekennzeichnet, dass das Unwuchtantriebssystem (40) dazu ausgebildet ist, zum Senken des durch den wenigstens einen Unwucht-Elektroantriebsmotor (38) erzeugten Drehmoments den durch den Unwucht-Elektroantriebsmotor (38) geleiteten Strom, ausgehend von dem Haltestrom, zu senken.Ground working roller according to claim 5 and claim 12,
characterized in that the unbalanced drive system (40) is designed to reduce the torque generated by the at least one unbalanced electric drive motor (38) by reducing the current conducted through the unbalanced electric drive motor (38), starting from the holding current. Bodenbearbeitungswalze nach einem der Ansprüche 1-13,
dadurch gekennzeichnet, dass die Unwuchtdrehachse (U) wenigstens einer Unwuchtmasse, vorzugsweise jeder Unwuchtmasse, der Walzendrehachse (D1, D2) entspricht, oder/und dass die Unwuchtdrehachse (U) wenigstens einer Unwuchtmasse (36), vorzugsweise jeder Unwuchtmasse, zur Walzendrehachse (D1, D2) versetzt und parallel angeordnet ist.Soil tillage roller according to one of claims 1-13,
characterized in that the unbalanced axis of rotation (U) corresponds to at least one unbalanced mass, preferably each unbalanced mass, the roller axis of rotation (D 1 , D 2 ), and/or that the unbalanced axis of rotation (U) corresponds to at least one unbalanced mass (36), preferably each unbalanced mass, to the roller axis of rotation (D 1 , D 2 ) is offset and arranged in parallel. Bodenbearbeitungsmaschine, vorzugsweise Bodenverdichter, umfassend wenigstens eine Bodenbearbeitungswalze (14, 24) nach einem der vorangehenden Ansprüche.A soil cultivating machine, preferably a soil compactor, comprising at least one soil cultivating roller (14, 24) according to one of the preceding claims. Verfahren zum Betreiben einer Bodenbearbeitungswalze (14, 24) nach einem der Ansprüche 1-14, vorzugsweise in einer Bodenbearbeitungsmaschine (10) nach Anspruch 15, umfassend die Maßnahmen: a) bei Deaktivierung der Unwuchtanordnung (32, 34), Senken der Drehzahl der wenigstens einen Unwuchtmasse (36) in einer Unwucht-Bremsphase, ausgehend von einer Betriebsdrehzahl, b) in einer auf die Unwucht-Bremsphase folgenden Unwucht-Rückführphase, Erzeugen eines Haltedrehmoments durch den wenigstens einen Unwucht-Elektroantriebsmotor (38) und Verringern des durch den Unwucht-Elektroantriebsmotor (38) erzeugten Drehmoments, ausgehend von dem Haltedrehmoment, zum Bewegen der wenigstens einen Unwuchtmasse (36) in die Ruhelage. Method for operating a soil tillage roller (14, 24) according to one of Claims 1-14, preferably in a soil tillage machine (10) according to Claim 15, comprising the measures: a) upon deactivation of the unbalanced arrangement (32, 34), lowering the speed of the at least one unbalanced mass (36) in an unbalanced braking phase, starting from an operating speed, b) in an unbalance return phase following the unbalance braking phase, generation of a holding torque by the at least one unbalance electric drive motor (38) and reducing the torque generated by the unbalance electric drive motor (38), starting from the holding torque, in order to move the at least an unbalanced mass (36) in the rest position.
EP22202044.8A 2021-11-19 2022-10-18 Soil working roller and method for operating a soil working roller Active EP4183924B1 (en)

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US20230160154A1 (en) 2023-05-25
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JP7318092B2 (en) 2023-07-31
JP2023075944A (en) 2023-05-31

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