Ground processing roller and method for operating a ground processing roller

Abstract

A ground processing roller for a ground processing machine, in particular a ground compactor, comprising a roller housing (18) extending in the direction of a roller rotation axis (D1) and enclosing a roller interior space (16) and an unbalance device (32) arranged at least partially in the roller interior space (16), wherein the unbalance device (32) comprises at least one unbalance mass (36) rotatable about an unbalance rotation axis (U) having a center of mass (M) eccentric to the unbalance rotation axis (U), an unbalance drive system (40) having at least one unbalance drive motor (38) for driving the at least one unbalance mass (36) to rotate about the unbalance rotation axis (U), wherein, in a deactivated state of the unbalance device (32), the at least one unbalance mass (36) is essentially in a rest position, wherein the unbalance drive system (40) is designed for operating the at least one unbalance drive motor (38) in an unbalance return phase in the deactivated state of the unbalance device (32) to move the at least one unbalance mass (36) into the rest position.

Description

TECHNICAL FIELD

[0001] The invention relates to a ground processing roller which can be used in a ground processing machine, such as a ground compactor, for processing a ground, in particular a compacted ground. The invention also relates to a method for operating such a ground processing roller or a ground processing machine having such a ground processing roller. BACKGROUND

[0002] A ground processing roller, which can be used as a compactor roller, for example, in a ground processing machine configured as a ground compactor, can have an unbalance device with at least one unbalance mass which is rotatable about an unbalance rotation axis. If the unbalance rotation axis corresponds to the rotation axis of the ground processing roller, a force which is oriented orthogonally to the rotation axis of the roller is exerted on the ground processing roller by the at least one rotating unbalance mass, thereby placing the ground processing roller in a periodic oscillatory motion which is substantially normal to the rotation axis of the ground processing roller. If, for example, two unbalance masses are provided with unbalance rotation axes which are offset relative to the rotation axis of the ground processing roller and arranged parallel to the rotation axis of the ground processing roller and are oppositely placed relative to each other with respect to the rotation axis of the ground processing roller, a periodic varying torque which is oriented substantially tangentially to the rotation axis of the ground processing roller can be exerted on the ground processing roller by the rotating unbalance masses to cause a periodic oscillatory motion of the ground processing roller.

[0003] In order to avoid the use of fossil fuels or to reduce the consumption of fossil fuels in such a ground processing machine, an unbalance drive motor can be provided in connection with the ground processing roller, by means of which the at least one unbalance mass can be driven to rotate. When the unbalance device is deactivated and thus the unbalance drive motor is not energized, it neither generates a drive torque nor a braking torque, so that the unbalance mass which is essentially driven to rotate by it positions itself in a stationary position of minimum potential energy, in which the center of gravity of such an unbalance mass is positioned essentially vertically below the unbalance rotation axis. If the operation of the unbalance mass rotating about the associated unbalance rotation axis at an operating rotational speed is started from an operating state in which the associated unbalance drive motor is deactivated, the unbalance mass moves to the stationary position. At the end of the transition to the stationary state or motion to the stationary position, the unbalance mass, which is not subjected to a braking torque, oscillates about the stationary position at a relatively low frequency and with a gradually decreasing amplitude, which can be perceived by a corresponding vibration at the ground processing roller or ground processing machine. SUMMARY

[0004] It is an object of the present application to provide a ground processing roller for a ground processing machine and a method for operating such a ground processing roller with which the occurrence of a pendulum movement of the unbalance mass can be avoided when the unbalance device is deactivated, i.e. when a transition into a rest state is made.

[0005] According to a first aspect of the present application, the object is achieved by a ground processing roller for a ground processing machine, in particular a ground compactor, comprising a roller housing which extends in the direction of a roller rotation axis and which encloses a roller interior space, and an unbalance device which is arranged at least partially in the roller interior space, wherein the unbalance device comprises at least one unbalance mass which is rotatable about an unbalance rotation axis and which has a center of gravity which is eccentric to the unbalance rotation axis, and an unbalance drive system which has at least one unbalance drive motor for driving the at least one unbalance mass in order to rotate it about the unbalance rotation axis, wherein, when the unbalance device is deactivated, the at least one unbalance mass is substantially in a rest position, wherein the unbalance drive system is designed to operate the at least one unbalance drive motor in an unbalance return phase when the unbalance device is deactivated in order to move the at least one unbalance mass into the rest position.

[0006] In the ground processing roller according to the present application, the pendulum of the unbalance mass is prevented by a defined movement of the at least one unbalance mass into the rest position, i.e. into a state of minimum potential energy, by a corresponding operation of the unbalance drive motor when the unbalance device is deactivated, i.e. when a transition into a rest state is made. No pendulum movement occurs, but the at least one unbalance mass is moved in a substantially continuous descending movement in the direction of the rest position from a state of higher potential energy, i.e. from a state in which the center of gravity of the at least one unbalance mass is higher than in the rest position.

[0007] Here, the unbalance drive system can be designed to move the at least one unbalance mass from the deflected position into the rest position when the unbalance device is deactivated. Thus, by operating the relevant unbalance drive motor between the two positions, i.e. on the one hand the deflected position and on the other hand the rest position, the at least one unbalance mass is brought into a state of lower or minimum potential energy without pendulum movement.

[0008] In the rest position, the center of gravity of the at least one unbalance mass can be positioned substantially vertically below the unbalance rotation axis in the vertical direction, i.e. in a state of minimum potential energy, while in the deflected position the center of gravity of the at least one unbalance mass can be deflected from the rest position by a deflection angle.

[0009] In order to be able to initiate a defined movement of the at least one unbalance mass at the beginning of the unbalance return phase, it is proposed that the unbalance drive system is designed to operate the at least one unbalance drive motor to generate a holding torque at the deactivation of the unbalance device, in particular at the beginning of the unbalance return phase.

[0010] To this end, the unbalance drive system may, for example, be designed to conduct a holding current through the at least one unbalance drive motor to generate the holding torque.

[0011] In order to convert the at least one unbalance mass from a normal rotational operation into a state in which it is moved back to the rest position without a noticeable pendulum movement in the unbalance return phase, the unbalance drive system can be designed to operate the unbalance drive motor to generate a braking torque for reducing the rotational speed of the at least one unbalance mass starting from the operating rotational speed in an unbalance braking phase preceding the unbalance return phase. In particular, this unbalance braking phase can serve to move the at least one unbalance mass into a deflection position or to position it in the range of the deflection position, so that the at least one unbalance mass in the deflection position is essentially brought to rest.

[0012] In order to keep the unbalance braking phase as short as possible, it is proposed that the braking torque is 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 drive motor.

[0013] In order to initiate the unbalance return phase, the unbalance drive system can be designed to operate the at least one unbalance drive motor to generate the holding torque when a transition rotational speed is reached and / or after a predetermined braking duration has elapsed from the beginning of the unbalance braking phase.

[0014] For example, the transition rotational speed can be zero. This means that in the unbalance braking phase the at least one unbalance mass actually enters the rest state and is positioned in the deflection position or moves only at a very low speed in the range of the deflection position at the end of the unbalance braking phase.

[0015] Since it is usually not known in which deflection position the at least one unbalance mass enters the rest state or approximately enters the rest state at the end of the unbalance braking phase, it is advantageous if the holding torque corresponds to the torque generated by the at least one unbalance mass when the at least one unbalance mass is positioned at a reference deflection angle, which is preferably in the range of 90° with respect to the rest position. In this way, it is prevented that the at least one unbalance mass suddenly falls due to the holding torque being too small.

[0016] In order to move the at least one unbalance mass to the rest position in the unbalance return phase, the unbalance drive system can be designed for operating the at least one unbalance drive motor to reduce the torque generated by the at least one unbalance drive motor starting from a holding torque when the at least one unbalance mass is positioned in the deflection position.

[0017] The reduction of the torque starting from the holding torque can be achieved, for example, by designing the unbalance drive system for reducing the current conducted through the unbalance drive motor starting from a holding current.

[0018] In order to generate the oscillating movement of the ground processing roller, the unbalance rotation axis of the at least one unbalance mass, preferably each unbalance mass, can correspond to the roller rotation axis. If the ground processing roller is placed in an oscillating movement, it can alternatively or additionally be provided that the unbalance rotation axis of the at least one unbalance mass, preferably each unbalance mass, is offset and arranged parallel to the roller rotation axis.

[0019] The invention also relates to a ground processing machine, preferably a ground compactor, comprising at least one ground processing roller constructed according to the invention.

[0020] Furthermore, the object stated in the introduction is achieved by a method for operating a ground processing roller constructed according to the invention, preferably in a ground processing machine constructed according to the invention, the method comprising the following measures:

[0021] a) reducing the rotational speed of the at least one unbalance mass starting from the operating rotational speed in an unbalance braking phase when the unbalance device is deactivated,

[0022] b) generating a holding torque by the at least one unbalance drive motor in an unbalance return phase following the unbalance braking phase, and reducing the torque generated by the unbalance drive motor starting from the holding torque to move the at least one unbalance mass to the rest position. BRIEF DESCRIPTION OF DRAWINGS

[0023] The invention is described in detail below with reference to the drawings. The drawings show:

[0024] Figure 1 A side view of a ground processing machine designed as a ground compactor with two ground processing rollers is shown;

[0025] Figure 2 A schematic diagram of the ground processing roller with the associated unbalance device is shown. DETAILED DESCRIPTION

[0026] In Figure 1In the middle, a ground processing machine designed as a ground compactor is designated overall with 10. The ground processing machine 10 comprises a ground processing roller 14 at a rear vehicle 12, which ground processing roller 14 can be rotated about a roller rotation axis D1 and has a roller interior space 16 surrounded by a roller housing 18. At a front vehicle 22, the ground processing machine 10 has a further ground processing roller 24 with a roller interior space 28 surrounded by a roller housing 26, wherein the front vehicle 22 is articulatedly connected to the rear vehicle 12 in an articulated connection region 20 for steering the ground processing machine 10. An operating platform 30 is also provided at the rear vehicle 12, from which an operator can operate the ground processing machine 10, for example to move it over a ground to be compacted, for example an asphalt material.

[0027] In the ground processing machine 10, the two ground processing rollers 14 can be driven to rotate about their roller rotation axes D1, D2. To this end, for example, an electrohydraulic drive system can be provided which has a travel hydraulic pump driven by an electric motor and a travel hydraulic motor assigned to each ground processing roller 14.

[0028] Furthermore, in connection with at least one ground processing roller, preferably both ground processing rollers, an unbalance device 32, 34 can be provided respectively, which is designated in principle by a broken line in Figure 1 The structure and mode of action of such an unbalance device will be described in detail below with reference to the unbalance device 32 assigned to the ground processing roller 14 of the rear vehicle 12. It should be noted that if such an unbalance device 32 or 34 is provided for both ground processing rollers 14, 24, they can be constructed identically to one another and can be operated in the same way.

[0029] The unbalance device 32 assigned to the ground processing roller 14 comprises at least one unbalance mass 36, which can be driven to rotate about an unbalance rotation axis U corresponding to the roller rotation axis D1 in the example shown, which unbalance mass 36 has a center of mass M which is eccentric to the unbalance rotation axis U. It should be noted that in Figure 2 In, the unbalance mass 36 is shown in two rotational positions positioned about the unbalance rotation axis U, which will be explained below. It should also be noted that a plurality of such unbalance masses 36 can be arranged in succession in the direction of the unbalance rotation axis U, for example in the roller interior space 16.

[0030] The unbalance mass 36 is associated with an unbalance drive motor 38, which is likewise arranged in the interior space 16 of the roller, for example. This can be powered by a battery, a fuel cell or the like provided at the ground processing machine 10 and can drive the associated unbalance mass 36 to rotate about the unbalance rotation axis U during a ground processing operation, i.e. for example when compacting asphalt material or the like. It is pointed out here that the unbalance drive motor 38 can be provided for driving a plurality of unbalance masses 36, which are arranged in succession, for example, along the direction of the unbalance rotation axis U. Alternatively, if a plurality of such unbalance masses 36 is provided, a separate unbalance drive motor 38 can be provided in association with each such unbalance mass 36 for driving it. The unbalance drive motor 38 is preferably a three-phase electric motor, which is driven by an inverter and supplied with the respective required voltage or the respective required current by means of the inverter for rotating at a target rotational speed or a target torque.

[0031] During operation of the ground processing machine 10 and in the event that the unbalance device 32 is activated, i.e. put into operation, the unbalance drive motor 38 drives the unbalance mass 36 to rotate about the unbalance rotation axis U at a rotational speed of up to several thousand revolutions per minute. Thereby, a force which is essentially orthogonal with respect to the roller rotation axis D1 is exerted on the ground processing roller 14 and puts it into a periodic vibratory motion.

[0032] If the operation of the unbalance device 32 is to be terminated, i.e. if it is to be deactivated, first the rotational speed of the unbalance mass 36 about the unbalance rotation axis U is reduced, for example at the beginning of deactivation of the unbalance braking phase. To this end, the unbalance drive motor 38 can be operated as a generator, for example, in order to obtain electrical energy from the constantly decreasing kinetic energy of the unbalance mass 36 and to feed it to an energy accumulator, i.e. a battery provided at the ground processing machine 10, for example. Alternatively, the unbalance drive motor 38 can be operated in a braking mode, in which a braking torque counteracting the rotation of the unbalance mass 36 is generated by energizing the unbalance mass. In principle, the unbalance drive motor 38 can also be operated in the generator mode or in the braking mode in different partial phases of the unbalance braking phase. In order to keep the unbalance braking phase as short as possible, the unbalance drive motor 38 can be driven in the unbalance braking phase, for example to generate the maximum possible braking torque, with the further provision that a rotational speed in the zero range is achieved as the target rotational speed.

[0033] At the end of the unbalance braking phase, i.e. at the achievement of the transition rotational speed in the zero range, the unbalance mass 36 is in an essentially unknown deflection position. The unbalance mass 36 or its center of gravity can be in Figure 2the center of gravity M of the unbalance mass 36 is positioned substantially vertically below the roller rotation axis D1. However, usually the unbalance mass 36 is positioned at an offset position not corresponding to the rest position at the end of the unbalance braking phase and remains in this offset position if the unbalance drive motor 38 is continued to be actuated, wherein the target rotational speed of the unbalance mass 36 is specified to be zero.

[0034] In case the unbalance mass 36 is driven to rotate by the unbalance drive motor 38, information about the instantaneous rotational speed of the unbalance mass 36 or the unbalance drive motor 38 is usually provided for example from the actuation of the unbalance drive motor 38 or by a rotational speed sensor. If the rotational speed of the unbalance mass 36, which is reduced from the operating rotational speed, reaches a transition rotational speed, this transition rotational speed can for example correspond to the target rotational speed specified for the unbalance braking phase in the zero range or if a sufficient long duration has passed since the start of the unbalance braking phase, which ensures that the unbalance mass 36 has reached an offset position not corresponding to the rest position, the unbalance drive system 40, for example comprising the unbalance drive motor 38 and the associated actuation unit, is switched to the unbalance return phase to prevent counter-rotational vibrations and oscillations of the unbalance mass 36. If in this state the unbalance drive motor 38 is completely deactivated, i.e. de-energized, while the unbalance mass 36 is first kept in the offset position, the unbalance mass will perform an oscillation movement around the unbalance rotation axis U, i.e. no longer move beyond the upper dead point of the circular movement. This oscillation movement will continue to move with a constantly decreasing amplitude until the unbalance mass 36 is in the rest position below the unbalance rotation axis U, wherein the center of gravity M of the unbalance mass 36 is positioned substantially vertically below the unbalance rotation axis U. Figure 2 the center of gravity M of the unbalance mass 36 is positioned substantially vertically below the roller rotation axis D1. However, usually the unbalance mass 36 is positioned at an offset position not corresponding to the rest position at the end of the unbalance braking phase and remains in this offset position if the unbalance drive motor 38 is continued to be actuated, wherein the target rotational speed of the unbalance mass 36 is specified to be zero.

[0035] To avoid perceptible vibrations at the ground working machine 10 caused by the oscillating movement of the unbalance mass 36, the unbalance drive motor 38 is energized at the transition into the unbalance return phase in such a way that it generates a defined holding torque. This holding torque is substantially smaller than the maximum braking torque generated or which can be generated in the unbalance braking phase and is determined, for example, in such a way that, in principle, the unbalance mass 36 can rest or remain in a deflected position offset from the rest position when the holding torque is generated by the unbalance drive motor 38. To this end, it can be provided, for example, that a torque is generated as holding torque which is so large that the unbalance mass 36 does not move in the direction of the rest position even if the deflected position has a reference deflection angle of 90° with respect to the rest position. The unbalance mass 36 is positioned in this deflected position in such a way that the center of gravity M of the unbalance mass lies on a horizontal line H which intersects the rotation axis U. This is a state in which, due to the maximum effective lever E between the rotation axis U and the center of gravity M of the unbalance mass 36 in the gravitational field, the unbalance mass 36 generates a maximum torque which counteracts or corresponds to the holding torque.

[0036] If the unbalance drive motor 38 generates such a holding torque at the beginning of the unbalance return phase, the unbalance mass first rests in the deflected position. From this state, the torque generated by the unbalance drive motor 38 is then gradually reduced from the holding torque in the unbalance return phase. This is achieved by reducing the current conducted by the unbalance drive motor 38. Due to the linearly reduced torque or current, for example, the unbalance mass 36 gradually moves downward from the deflected position in which it first rests in the direction of the rest position and, when the torque generated by the unbalance drive motor 38 has been reduced to zero, it is in the rest position.

[0037] When the torque provided by the unbalance drive motor 38 is reduced from the holding torque to zero, the unbalance mass 36 gradually and substantially continuously returns to the rest position without oscillating movement, so that substantially no overshoot or movement beyond the rest position occurs. The unbalance mass 36 thus returns to the rest position without perceptible oscillating movement at the ground working machine 10. If this state is reached, the operation of the unbalance drive system 40 is adjusted or the unbalance drive motor 38 is no longer loaded with voltage, so that it is de-energized and does not generate any torque acting on the unbalance mass 36. Due to the force of gravity, the unbalance mass 36 rests in its rest position, in which the unbalance mass 36 or its center of gravity M is in a position of minimum potential energy.

[0038] A particular advantage of the design of the ground processing rollers 14 or 24 according to the invention is that the transition of the unbalanced mass block 36 to the rest position is independent of whether the ground processing machine 10 is standing on a horizontally oriented surface or on an inclined surface in the gravitational field. In the rest position and when the unbalanced drive motor 38 is deactivated, the unbalanced mass block 36 is always in a state of minimum potential energy, wherein its center of gravity M is vertically (i.e., along the direction of gravity) positioned below the unbalanced rotation axis U. No sensors are required to provide information about the slope of the ground where the ground processing machine 10 is located.

[0039] Finally, it should be noted that, for the ground processing rollers 14, 24 constructed according to the present invention or their operating method, the holding torque generated by the unbalanced drive motor 38 may, for example, be less than (in the... Figure 2 (In the illustrated state) the holding torque required to hold the unbalanced mass block 36 at the maximum torque generated by it. This shortens the duration of the unbalanced return phase. In principle, the duration of the unbalanced return phase can also be shortened, i.e., starting from the holding torque, for example by a linear decrease in the deviation torque, the torque, or the current conducted by the unbalanced drive motor 38, decreases faster at the beginning of the unbalanced return phase than at the end. In principle, there can also be a phase in the unbalanced return phase where the torque provided by the unbalanced drive motor 38 temporarily decreases to zero or a value within the zero range, thereby temporarily allowing the unbalanced mass block 36 to approach its rest position more quickly.

[0040] It should also be noted that the holding torque at the start of the unbalanced return phase is generated in the direction about the unbalanced rotation axis U, which ensures that the unbalanced mass block 36 does not return to its rest position or accelerate towards its rest position. When the unbalanced mass block 36 is positioned at... Figure 2 At the deflection position shown, a holding torque is thus generated in the clockwise direction. If the unbalanced mass block 36 is positioned at... Figure 2 To the right of the unbalanced rotation axis U, a holding torque is generated in the counterclockwise direction.

[0041] Finally, it should be noted that the principles of the present invention can be applied not only to unbalanced devices intended to generate vibratory motion, but also, for example, to unbalanced devices having two unbalanced mass blocks, wherein the two unbalanced mass blocks, having an unbalanced rotation axis offset from and parallel to the roller rotation axis, are arranged opposite to each other, for example, relative to the roller rotation axis. Even with such an unbalanced rotation axis offset from the roller rotation axis, when one or more unbalanced drive motors are not activated, the unbalanced mass blocks will position themselves in a state of minimum potential energy. In this arrangement, the oscillating motion of the unbalanced mass blocks can also be avoided in the manner described above.

Claims

1. Ground processing roller for a ground processing machine, comprising a roller housing (18, 26) extending in the direction of a roller rotation axis (Dl, D2) enclosing a roller interior space (16, 28) and an unbalance device (32, 34) arranged at least partially in the roller interior space (16, 28), wherein The unbalance device (32, 34) comprises at least one unbalance mass (36) rotatable about an unbalance rotation axis (U) having a center of mass (M) eccentric to the unbalance rotation axis (U) and an unbalance drive system (40) having at least one unbalance drive motor (38) for driving at least one unbalance mass (36) to rotate about the unbalance rotation axis (U), wherein, in a deactivated unbalance device (32, 34), at least one unbalance mass (36) is in a rest position, wherein, in the rest position, the center of mass (M) of at least one unbalance mass (36) is vertically positioned below the unbalance rotation axis (U) in a vertical direction, characterized in that the unbalance drive system (40) is designed for operating at least one unbalance drive motor (38) in an unbalance return phase of a deactivated unbalance device (32, 34) to move at least one unbalance mass (36) from a deflected position to the rest position, wherein, in the deflected position, the center of mass (M) of at least one unbalance mass (36) is deflected from the rest position by a deflection angle.

2. The floor finishing roller of claim 1, wherein, The unbalance drive system (40) is designed for operating at least one unbalance drive motor (38) to generate a holding torque when the unbalance device (32, 34) is deactivated.

3. The floor processing roller of claim 2, wherein, The unbalance drive system (40) is designed for conducting a holding current through at least one unbalance drive motor (38) to generate a holding torque.

4. The floor processing roller of any one of claims 1 to 3, wherein, The unbalance drive system (40) is designed for operating the unbalance drive motor (38) to generate a braking torque for reducing a rotational speed of at least one unbalance mass (36) starting from an operating rotational speed in an unbalance braking phase before the unbalance return phase.

5. The floor finishing roller of claim 4, wherein, The unbalance drive system (40) is designed for operating at least one unbalance drive motor (38) to generate a holding torque when the unbalance device (32, 34) is deactivated, and the braking torque is greater than the holding torque.

6. The floor finishing roller of claim 4, wherein, The unbalance drive system (40) is designed for operating at least one unbalance drive motor (38) to generate a holding torque when the unbalance device (32, 34) is deactivated; and the unbalance drive system (40) is designed for operating at least one unbalance drive motor (38) to generate a holding torque when a transition rotational speed is reached and / or after a predetermined braking duration has elapsed since the start of the unbalance braking phase.

7. The floor finishing roller of claim 6, wherein, The transition rotational speed is zero.

8. The floor finishing roller of claim 2, wherein, The holding torque corresponds to a torque generated by at least one unbalance mass when at least one unbalance mass is positioned at a reference deflection angle.

9. The floor processing roller of any one of claims 1-3, wherein, The unbalance drive system (40) is designed to operate the at least one unbalance drive motor (38) to generate a holding torque when the unbalance device (32, 34) is deactivated; the holding torque corresponds to a torque generated by the at least one unbalance mass (36) when the at least one unbalance mass is positioned at a reference deflection angle; and the reference deflection angle is within a range of 90° with respect to the rest position.

10. The floor finishing roller of any one of claims 1 to 3, wherein, The unbalance drive system (40) is designed to operate the at least one unbalance drive motor (38) to generate a holding torque when the unbalance device (32, 34) is deactivated; and the unbalance drive system (40) is designed to operate the at least one unbalance drive motor (38) to reduce the torque generated by the at least one unbalance drive motor (38) starting from the holding torque to move the at least one unbalance mass (36) from a deflection position to the rest position.

11. The floor finishing roller of claim 10, wherein, The unbalance drive system (40) is designed to conduct a holding current through the at least one unbalance drive motor (38) to generate a holding torque; and the unbalance drive system (40) is designed to reduce the current conducted through the unbalance drive motor (38) starting from the holding current to reduce the torque generated by the at least one unbalance drive motor (38).

12. The floor processing roller of any one of claims 1-3, wherein, The unbalance rotation axis (U) of the at least one unbalance mass corresponds to the roller rotation axis (D1, D2); and / or the unbalance rotation axis (U) of the at least one unbalance mass (36) is offset and arranged parallel with respect to the roller rotation axis (D1, D2).

13. The floor finishing roller of any one of claims 1 to 3, wherein, The unbalance rotation axis (U) of each unbalance mass corresponds to the roller rotation axis (D1, D2); and / or the unbalance rotation axis (U) of each unbalance mass is offset and arranged parallel with respect to the roller rotation axis (D1, D2).

14. The floor processing roller of claim 1, wherein, The ground processing machine is a ground compactor.

15. A ground processing machine comprising at least one ground processing roller (14, 24) according to any one of claims 1 to 14.

16. The ground engaging machine of claim 15, wherein, The ground processing machine is a ground compactor.

17. A method for operating a ground processing roller (14, 24) according to any one of claims 1 to 14, the method comprising the following measures: a) reducing the rotational speed of the at least one unbalance mass (36) starting from an operating rotational speed in an unbalance braking phase when the unbalance device (32, 34) is deactivated, b) generating a holding torque by the at least one unbalance drive motor (38) in an unbalance return phase following the unbalance braking phase, and reducing the torque generated by the unbalance drive motor (38) starting from the holding torque to move the at least one unbalance mass (36) to a rest position.

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