WO2019115003A1

WO2019115003A1 - Self-propelled ground milling machine

Info

Publication number: WO2019115003A1
Application number: PCT/EP2018/000547
Authority: WO
Inventors: Rafael Schomaker; Joachim Ponstein; Jürgen Heusinger
Original assignee: Bomag Gmbh
Priority date: 2017-12-14
Filing date: 2018-12-07
Publication date: 2019-06-20
Also published as: DE112018006346A5; DE102017011605A1

Abstract

A self-propelled ground milling machine (1), in particular a road milling machine, comprising a machine frame (3) borne by driving devices (2), a drive motor (4) arranged on the machine frame, a manoeuvring platform (5) arranged on the machine frame, a milling device (7) driven by the drive motor and having a milling roller box (9) which is open at least to the underside and connected to the machine frame, and a milling roller (10) which is rotatable inside the milling roller box around a horizontal working direction and transverse to a working direction and partially projects to the underside of the milling roller box during milling operation, and comprising a mounting tube (14) and a plurality of milling tools (16) arranged on an outer lateral surface (15) of the mounting tube, wherein a drive train (11) is present which transfers the drive energy generated by the drive motor to the milling roller to drive the rotational movement of the milling roller during milling operation, wherein a vibration damping device is arranged between the machine frame and the complete milling roller in such a manner that vibrations arising on the mounting tube during milling operation are damped against the machine frame, wherein the vibration damping device comprises at least one damping element (12) arranged between the milling roller box and the machine frame.

Description

SELF-PROPELLED FLOOR CREAM MACHINE

The invention relates to a self-propelled soil milling machine, in particular a road milling machine, a stabilizer or a recycler.

Self-propelled ground milling machines are known in the art, for example from DE 10 2014 011 856 A1, DE 10 2012 008 252 A1, DE 10 2015 016 678 A1 and DE 10 2016 013 1 32 A1. Such ground milling machines usually comprise a machine frame carried by driving devices. The driving devices are usually wheels and / or track drives of a known type. These are also preferably at least partially or completely via suitable height adjustment devices, in particular lifting columns, connected to the machine frame, so that the height of the machine frame relative to the ground surface is variable. Such an arrangement is described for example in DE 10 2015 01 6 678 A1. Alternatively, only the height of the milling unit relative to the ground relative to the machine frame can be varied. Furthermore, generic ground milling machines are self-propelled construction machines with a drive motor arranged on the machine frame, usually an internal combustion engine, with which the drive energy required for driving and working operation is generated. Furthermore, a control station is usually arranged on the machine frame, in particular also in the form of a driver's cab. From the helm, at least partially the operation of the construction machine.

Generic ground milling machines are used for milling the soil background in the desired depth. For this purpose, the ground milling machine comprises, as a working device, a milling device driven by the drive motor with a milling drum box which is open at least towards the underside and which is suitably connected to the machine frame and inside the Fräswalzenkastens about a horizontal and transversely to a working direction rotatable and to the bottom of the Fräswalzenkastens during milling partially protruding milling drum with a support tube and a plurality of arranged on an outer surface of the support tube milling tools. The Fräswalzenkasten can be directly and statically connected to the machine frame or suspended, for example, chains. In this case, the milling device can in particular also be embodied as a cross-over module mounted on the other ground milling machine, as disclosed, for example, in DE 10 2015 016 678 A1 and DE 10 2016 013 132 A1. The rotational movement of the milling drum within the milling drum box is driven by means of a drive train which transmits drive energy generated by the drive motor to the milling drum. This drive train may in particular comprise, for example, a belt or chain drive or be designed as a hydraulic drive. It can also be provided that a planetary gear is present within the support tube of the milling drum, with which the transmitted via the belt or chain transmission rotary motion is translated into a rotational movement of the milling drum with the desired speed. Likewise, any other type of transmission is conceivable. The powertrain may also include, for example, a clutch or the like. It is also known in this context to equip the belt or chain transmission with a belt or chain tensioner and / or to provide an auxiliary drive for driving a very slow rotational movement of the milling drum in the maintenance operation.

A disadvantage of the known Bodenfräsmaschinen that induced by the chisel in the milling process vibrations that are transmitted to the entire machine via the support tube of the milling drum and the Fräswalzenkasten, the Bodenfräsmaschine is subject to considerable vibration stress due to the milling process. This significantly affects the ease of use of such a ground milling machine, especially for persons located on the ground milling machine. In order to counteract this, it is already known to mount the control station in a vibration-damped manner relative to the machine frame and / or to equip the control station with a vibration-damping foot mat. Although these solutions are effective but also unsatisfactory, since on the one hand the achieved damping result is often not satisfactory and on the other hand, often the Cesamtbelastung the Bodenfräsmaschine with vibrations is not significantly lowered.

The object of the invention is therefore to provide a way to significantly reduce the transmission of vibrations caused by the milling drum located in the milling operation, in particular to the control gear and at the same time to allow a reliable milling operation. The object is achieved with a ground milling machine, in particular a road milling machine, a soil stabilizer or a recycler, according to the independent claim. Preferred developments are specified in the dependent claims.

According to the invention, it is provided that a vibration damping device is arranged between the machine frame and the entire milling drum, such that vibrations arising on the support tube during the milling operation are damped towards the machine frame. This means that between the milling drum and the machine frame thus a damping stage is provided which causes a significant reduction in the transmission of vibrations generated during the milling process on the milling drum in particular the machine frame. It is essential that according to the invention on the one hand a vibration damping with respect to the entire milling drum, wherein the Bodenfräsmaschine preferably exclusively a single milling drum having a one-piece, hollow cylindrical support tube. Relevant is thus the entire assembly and storage area between the milling drum and the machine frame, that is, in particular the immediate storage of the milling drum itself as well as the storage of the milling device on the machine frame. On the other hand, this significantly reduces the transmission of vibrations occurring at the milling device to the machine frame, since, in contrast to the solutions known hitherto from the prior art, the vibration damping takes place considerably closer to the point of origin of the vibrations, namely the cutting chisels engaging in the ground surface.

As already mentioned above, the inventive approach is to provide the vibration damping device in the mounting and storage area between the milling drum and the machine frame. The assembly and storage area refers to those parts of the ground milling machine, which are positioned for assembly and / or storage purposes between the support tube of the milling drum and the machine frame. It is preferred if the vibration damping device comprises at least one arranged between the Fräswalzenkasten and the machine frame damping element, in particular a rubber buffer and / or a silentbloc. This at least one damping element is ideally boxes directly between the milling rollers and the machine frame positioned so that the storage of Fräswal zenkastens on the machine frame on this at least one damping element, in particular directly takes place. The damping elements are preferably designed such that they can transmit the feed force of the milling machine and especially when placed on the milling drum and the very high drive torque or forces of the milling drum drive. In this case, only limited relative movements of the milling drum should be possible (inter alia due to collision with other machines). dividing or milling accuracy during fine milling). At the same time, the vibrations should be sufficiently damped. The damping element thus also takes on the necessary for the storage of the Fräswalzenkastens on the machine frame carrying capacity. In order for vibrations occurring at the milling drum to be transferred to the milling drum box during the milling process, however, it is only transmitted to the machine frame in attenuated or reduced thickness by the at least one damping element.

It is preferred if a plurality of damping elements between the Fräswalzenkasten and the machine frame are arranged. Thus, the load-bearing and vibration damping load of the damping elements distributed through the Fräswalzenkasten simultaneously to a plurality of damping elements, so that, for example, increased service life achieved and / or structurally smaller damping elements can be used. The plurality of damping elements are ideally arranged in pairs and mirror-symmetrically with respect to a longitudinal and / or transverse vertical plane of symmetry. This allows a comparatively simple way to achieve a substantially homogeneous load distribution between the plurality of existing damping elements. It is optimal if the several damping elements are all identical in order to facilitate, for example, maintenance work here.

It is essential that a reliable storage of the Fräswalzenkastens succeed on the existing damping elements on the machine frame of the ground milling machine. Particularly suitable for this purpose is an arrangement of the at least one damping element directly on a rear wall and / or top wall and / or front wall of the milling drum box or on a firmly connected to the rear wall and / or top wall and / or front wall of the Fräswalzenkastens holding device. Such a holding device provided in addition to the machine frame is particularly advantageous if the milling drum box is designed as an exchangeable overall module. Examples of such systems are disclosed, for example, in the publications DE102015016678A1 and DE102016013132A1, to which reference is hereby made.

Additionally or alternatively, the at least one damping element is preferably attached directly to the machine frame, in particular on its underside, or on a fixedly connected to the machine frame with the underside holding device.

It is preferred if the at least one damping element on the opposite of its connection to the machine frame or on the Fräswalzenkasten a fastening part of a releasable fastening device, with which the Fräswalzenkasten releasably on Maschinen- frame is fastened. The at least one damping element is then integrated directly into the releasable attachment between the machine frame and the milling roller boxes and is either removed from the ground milling machine together with the milling drum box or remains on the machine frame when the milling drum box is dismounted.

In addition or as an alternative to the above-described arrangement of the at least one damping element between the milling rollers boxes and the machine frame, it is preferred if the milling drum to a rotary bearing in which the milling drum is mounted for rotation about its axis of rotation, and / or to a Drive bearing, in which the milling drum is connected to the drive train, is connected via at least one damping element of the vibration damping device. The rotary bearing thus refers to a bearing of the milling drum, which essentially serves to support the milling drum in the desired position within the milling drum box and / or the machine frame and to allow a defined rotational movement of the milling drum. In contrast, the drive bearing refers to a bearing of the milling drum, via which drive energy is transmitted from the particular drive train to the milling drum for driving the rotational movement. The at least one damping element is in particular arranged such that it moves with the milling drum and thus also rotates in the milling process about the axis of rotation of the milling drum. In order for the at least one damping element moves in relation to the arrangement between the machine frame and the Fräswalzenkasten even closer to the source of the vibrations resulting from the milling process on the Fräsmeißeln the milling drum.

Again, it is preferred that the connection of the milling drum on the rotary bearing and / or the drive bearing comprises a plurality of damping elements, wherein the plurality of damping elements of the rotary bearing and / or the drive bearing are ideally positioned point symmetrical to the axis of rotation in a plane perpendicular to the axis of rotation of the milling drum , In this way, an optimal force distribution and vibration damping, especially in different rotational positions of the milling drum to the axis of rotation succeeds. The damping elements are in particular arranged such that vibrations in the vertical and / or horizontal direction are particularly well damped. Depending on the design of the damping element, this may mean, in particular, that the damping elements are subjected to shear in the vertical and / or horizontal direction. Also annular damping elements can be used.

In a preferred specific embodiment, it is provided that the milling drum wenigs least comprises an inner dish washer, wherein the at least one damping element to the rotary bearing and / or the drive bearing to the milling drum out with the dish washer, in particular via a screw, connected. In a dish washer is thus an annular disc-like element which is firmly connected within the support tube with this. Übli cherweise at least one dish washer is present, which is arranged eccentrically offset to one of the two end faces of the milling drum.

The rotary bearing is preferably a floating bearing and / or the drive bearing preferably a Festla ger. The rotary bearing is also preferably arranged closer to that end face of the milling drum, which is opposite to the drive train. The drive bearing, however, is preferably arranged closer to that end face of the milling drum, which is closer to the drive train. For example, the frontal supply of drive energy generated by the drive motor on the vorste starting already described at least partially laterally adjacent to the milling drum extending belt or chain transmission. On this side, it is accordingly also preferred that there the drive bearing or the hydraulic drive is arranged to avoid long transmission paths within the support tube.

[001 7] In the specific embodiment of the arrangement of the at least one damping element on the rotary bearing and / or drive bearing of the milling drum can be used in principle to manifold variations. It is ideal if the connection of the milling drum to the drive bearing takes place via at least two damping elements, which are connected to the disk disk, which project in the axial direction from the disk disk to an end side of the milling drum, and which on its side opposite the disk disk with a within the Support tube arranged outer housing of a planetary gear of the drive train are connected. The at least two damping elements are thus preferably arranged such that they are subjected to shear in the radial direction to the axis of rotation of the milling drum. The existing at least two damping elements are ideally arranged offset in the direction of rotation of the milling drum about its axis of rotation by equal angular amounts to each other in order to achieve the most uniform vibration damping and weight distribution.

It is optimal if the at least one damping element is positioned to the drive bearing in the radial direction to the axis of rotation of the milling drum further outward than the at least one damping element to the rotary bearing. In this way, an increased installation space is available for the rotational axis on the side of the drive bearing, for example for accommodating a transmission unit. Also, the force to be transmitted by the individual damping element becomes smaller, which is likewise advantageous. For a particularly reliable operation of the ground milling machine according to the invention a monitoring device is preferably provided, which is designed such that it monitors the state of the at least one damping element. The at least one damping element is subject in practical use due to the damping of vibrations considerable, in particular mechanical, loads. Since the bearing of the milling drum on the rotary bearing and / or drive bearing and / or the Fräswalzenkastens on the machine frame via the at least one damping element, this is thus also a significant support and storage function. Also, depending on the specific arrangement, the transmission of a drive torque may be added via the at least one damping element. In order to enable a defined positioning of the milling roller box and a reliable milling operation or a desired rotational movement of the milling drum about its axis of rotation, it is thus important that the at least one damping element is in a state for maintaining this function. In the extreme case, the at least one damping element can tear, for example, or be excessively and permanently deformed by aging. Then, a continuation of the milling operation is to be avoided as a rule, since a functional integrity of the at least one damping element and in particular a reliable maintenance of the positioning of the milling drum can no longer be guaranteed. In practice, such a monitoring device may for example comprise a sensor which monitors an integrity parameter of the damping element, for example an extent in a spatial dimension, a vibration behavior of the damping element at a predetermined location, the temperature of the damping element or the like. The monitoring device further comprises a control unit connected to the sensor, via which the evaluation of the measured data detected by the sensor and in particular the detection of a failure of the at least one damping element takes place, for example by reaching predetermined limit values and / or unexpected signal changes. With the aid of the monitoring device, in particular in addition to a visual inspection, increased operational safety can thus be ensured

Preferably, the control unit is designed such that it controls a display device such that they Mentes at least in the case of a detected defect of at least one Dämpfungsele Mentes and / or upon reaching predetermined limits and / or unexpected signal changes on the sensor visually and / or visually perceptible display signal outputs. This may, for example, be a lighting up of a control lamp, a display within a suitable display screen and / or the output of an acoustic sound signal, the display signal ideally being output in the area of the control station of the ground milling machine. A detected defect is, for example, the complete destruction of the least At least one damping elements or on the other hand reaching previously defined thresholds / or. Limits. In this case, the ground milling machine thus also includes a display device controlled by the control unit.

The control unit may also be designed such that it engages in the machine operation, in particular in the case of a detected defect of the at least one damping element. Concretely, the control unit, for example, then control a working and / or driving parameters of the Bo denfräsmaschine or appropriate control signals to a machine control übermit stuffs. Particularly advantageous actions, which can be triggered in this context by the control unit, are complementary or alternatively releasing a detachable coupling connection within the drive train, so that no drive energy from the drive motor to the milling drum out more, and / or lowering a Fräswalzendrehzahl to a predetermined Maximum value and / or the triggering of a machine stop in relation to the milling and / or ferry operation of the ground milling machine and / or the lowering of a feed of the ground milling machine in the milling operation to a predetermined maximum value. All of these measures aim to prevent the milling operation per se or its intensity or at least to minimize such that the presence of at least one defective damping element is unproblematic for the working operation, in particular under safety aspects.

It can also be provided that the control unit monitors the total operating time, in particular with regard to operating hours and / or operating time, of the at least one damping element. In this embodiment, the control unit thus constitutes a type of counting unit, which records either the actual operating hours, in particular the milling operation, of the at least one damping element and / or the operating time, i. the period from when the at least one damping element has been newly installed counts or records. Again, it is provided in particular that the control unit then controls a display device such that it outputs a visually and / or visually perceptible display signal at least in the case of reaching or exceeding a specified number of operating hours and / or operating time. This ensures that the operator of the Bodenfräsmaschine the arrival or exceeding of a specified number of operating hours and / or operating time is signaled in good time and he already considers before the failure of the at least one damping element exchange of at least one damping element into consideration.

A particularly secure embodiment of the ground milling machine according to the invention can be obtained that a, in particular mechanically acting, catching device is present, the is designed such that it holds in the case of a defective damping element, the milling drum substantially in its relative position to the Fräswalzenkasten or the Fräswalzenkasten substantially in its relative position relative to the machine frame relative to a desired position in position. The object of the catching device is thus that it traps the at least one damping element downstream in the event of a defect of the at least one damping element, the milling drum and holds in a secure position within the Fräswalzenkastens or the milling drums boxes in a secure position relative to the other Bodenfräsmaschine , In normal operation, the catcher is thus disengaged and affects neither the rotational movement of the milling drum nor the vibration damping by the at least one damping element. If the at least one damping element is defective, it can no longer adequately fulfill its bearing and positioning functions. For this case, it is then provided that, starting from a certain extent of the defect of the at least one damping element, the catching device mechanically engages this downstream. In this way, it is ensured that even in the case of a defective damping element, the milling drum and / or the milling drums does not occupy an uncontrolled relative position to the other floor milling machine.

Specifically, it is in the catcher preferably in the vertical direction we kende positive locking device, comprising at least one catch ring on the milling drum, wherein the positive connection between the catch ring and another catch element, in particular a box on the milling or arranged on the machine frame of the Bodenfräsmaschine and coming from the front side of the milling drum in the direction of the axis of rotation, the milling drum perpendicular thereto overlapping catch projection, only at defective at least one damping element occurs, and / or formed on a machine frame or Fräswalzenkasten fishing hook, which then comes into engagement with the counter element on Fräswalzenkasten or on the machine frame if the at least one damping element is defective. With defective at least one Dämp tion elements, the milling drum and / or the Fräswalzenkasten thus slip from its original position into a catching position in which they are mechanically held by the respective catching device.

The invention will be described with reference to the examples given in the figures closer. They show schematically:

Figure 1: A side view of a ground milling machine;

Figure 2 is a side view of the lower part of a ground milling machine; 3 shows a vertical cross-sectional view along the axis of rotation of the milling drum through a

Milling rollers boxes;

Figure 4 is a detail sectional view through a fastening device of a Fräswalzenkastens on a machine frame; and

FIG. 5 shows a perspective partial cross-sectional view through a milling drum box.

Identical and / or functionally identical components are provided in the figures with the same reference numerals, wherein not every repeating component is marked separately in the figures.

FIG. 1 initially illustrates the basic structure of an embodiment of a ground milling machine 1. Essential elements here are a machine frame 3 supported by driving devices 2, a drive motor 4 (indicated only schematically in FIG. 1), a control station 5, a transport conveyor 6 and a milling device 7. The driving devices 2 are chain drives in the present exemplary embodiment, but may also be wheels , At least partially, the driving devices 2 are also connected via lifting columns 8 to the machine frame 3 in order to enable height adjustment of the machine frame 3 in the vertical direction and thus also the milling device 7 arranged on the machine frame 3 in a manner known per se in the prior art, for example Adjustment and regulation of the milling depth. The interchangeable as on the other ground milling machine 1 module milling device 7, which is fastened tigt via a suitable releasable fastening means on the underside of the machine frame of the ground milling machine comprises a milling drum boxes 9 and arranged within the Fräswalzenkastens milling drum 10 (in Figure 1 only schematically indicated ), which is rotatable in the milling operation about a horizontal and transverse to the working direction A axis of rotation R. The milling drum 10 comprises a support tube with a plurality of milling tools arranged on its outer circumferential surface. The drive motor 4 provides the drive energy required for the ferry operation of the ground milling machine 1 and for the rotation operation of the milling drum 10 of the milling device 7. For this purpose, a drive train 11 is provided in the present embodiment, which connects the drive motor 4 with the milling drum 10, in the present embodiment, inter alia, via a belt transmission, for energy transfer. Specifically, a stabilizer / recycler has deviating from this no lifting columns for adjusting the milling depth. Here, the milling drum is adjusted in a conventional manner with pivotally mounted on the machine frame rotor arms in height. Included separately from the invention are also embodiments which have one or more Damping element within such a rotor arm, in particular between two Rotorarmhälften have.

Figure 2 shows a further schematic section of the ground milling machine 1 of Figure 1 below the horizontal dashed lines indicated in Figure 1 (wherein the transport conveyor 6 is not shown in its entirety). It is essential that the Fräswalzenkasten 9 is connected at its upper side in the present case only a plurality of damping elements 12 to the underside of the machine frame 3 and is held by this exclusively on the plurality of damping elements 12 in position on the machine frame. Basically, the number and specific arrangement of the damping elements between the milling rollers boxes 9 and the Maschi nenrahmen and / or a special connected to the machine frame holding device is variable. In the present embodiment, however, it is concretely provided to provide a total of at least two pairs of damping elements 12, wherein a pair of damping elements 12 seen in the cutting direction A lying one behind the other lying on the right side and the other pair of damping elements 12 on the left side in the cutting direction A successively lying on top of the Fräswalzenkastens 9 are arranged. The total of four damping elements are thus arranged substantially in a common horizontal plane in the corners of a virtual rectangle.

By means of the damping elements 12 between the Fräswalzenkasten 9 of the milling device 7 and the machine frame 3 of the ground milling machine 1 manages forwarding in the milling process on the milling drum 10 by the ground contact of the individual milling tools emerging vibrations to the machine frame 3 out and thus to the milling device 7 remaining ground milling machine 1 towards damping, so that there the vibration load can be significantly reduced by emanating from the milling drum in the milling process vibrations. The damping elements 10 may be, for example, rubber buffers and / or silentblocs or other vibration-damping connecting devices between two structural units.

Figure 3 shows a vertical section through the milling device 7 along the axis of rotation R according to the section line I of Figure 1. Recognizable are the damping elements 12 mentioned in Figure 2 on the top 13 and the ceiling wall of the Fräswalzenkastens 9. Figure 3 illustrates first more Details of the specific structure of the milling drum 10 with a hollow cylindrical support tube 14, on the outer circumferential surface 15 a plurality of milling tools 16 (in Figure 3, only the cross-sectional edge milling tools are shown) is arranged. In the interior of the support tube 14 are two plate discs 1 7A and 17B fixed to the support tube fourteenth connected and are in the direction of rotation axis R radial direction of the inner shell wall in the direction of the axis of rotation R. Further, parts of the drive train 1 1 can be seen, in particular a driven pulley 18 of the belt drive, as shown in detail in Figure 2, and the continuation of the drive train 1 1 thereof starting from the milling drum through a gear stage 19 toward a planetary gear not shown in detail an external housing 20. The concrete mechanical configuration of this drive train 11 per se is known from the prior art.

It is essential that the storage of the support tube 14 of the milling drum 10 and the connection of the support tube 14 to the drive train 11 via respective damping elements 21 (storage of the support tube 14 to a rotary bearing 21) and damping elements 23 (storage of the support tube 14 at a drive bearing 24). Thus, both the position of the milling drum 10 within the milling rollers would ns 9 and the transmission of coming from the drive train 1 1 Antriebsener gie for generating the rotational movement of the milling drum 10 about its axis of rotation R via respective damping elements 21 and 23 causes. In this way, in the milling process on the milling drum 10 generated and forwarded oscillations to the remaining Fräswalzenkasten 9 and also to the other Bodenfräsmaschine 1 through the grounding in contact with milling tools 16 and further deflected significantly attenuated, so that the vibration load of the ground milling machine 1 is significantly reduced during operation.

The damping elements 21, which are arranged to introduce the drive train 1 1 in the interior of the support tube 14 on the opposite side, connect the firmly connected to the support tube 14 plate washer 17A with a bearing pin 25 which is part of the rotary bearing 22. This is designed in the present case as a floating bearing. The particular shear movements perpendicular to the axis of rotation R damping damping elements 21 thus cause a damping of the transmission of vibrations to the rotary bearing 22 and thus to the Fräswalzenkasten 9 out. Additionally or alternatively, the damping elements can also be arranged such that they transmit little or no shear forces and essentially compressive forces. The damping elements 21 are formed in particular as connected to the bearing pin 25 and the plate disc 1 7 A via individual screw rubber buffers.

On the other hand, the damping elements 23 connect the cup disc 1 7B with connection projections provided for radially outwardly projecting connection projections on the housing 20 of the planetary gear. The housing 20 is rotated by the planetary gear. This rotational movement is thus subsequently transmitted via the damping elements 23 to the disk separator. Be 1 7B and thus transferred to the permanently connected to this support tube 14. Thus, the drive bearing 26 forms the bearing over which or from which ultimately the required for the rotational operation of the milling drum 10 drive energy is transferred to this. Analogous to the damping elements 21, a transmission of vibrations to the milling drum box 9 and the machine frame 3, which is produced at the milling tools 16 during the milling process, is thus also damped via the damping elements 23. It is essential that on the damping elements 21 and 23 immediately behind the source of unwanted vibrations, namely the milling drum 10, the rest of the ground milling machine 1 towards the vibration damping takes place, so that the vibration load of the rest of the machine is significantly reduced.

In the embodiment shown in Figure 3, a purely mechanically acting catcher 27 is further provided, which in the case of defective damping elements 21, the milling drum 10 within the Fräswalzenkastens 9 traps and prevents, for example, beyond a reliable level outgoing sagging of the milling drum in the vertical direction down. For this purpose, the capture device 27 comprises a catch ring 28 formed in the present case by the support tube 14 and a firmly attached to the side wall of the Fräswalzenkastens 9 and projecting into the interior of the support tube 14 in the direction of the axis of rotation R catch element 29. Are the damping elements 21, for example, defective, sags the milling drum 10 due to its own weight in the vertical direction down. However, this movement is prevented by an abutment of the catching ring 28 formed by the inner wall of the supporting tube 14 against the fixed catching element 29 which overlaps in the catching direction of the vertical direction. A rotational movement of the milling drum 10 about the rotation axis R is then not possible without further notice. However, the milling drum 10 is at least per se still held substantially in position. Additionally or alternatively, it is also possible, please include that when positioning the damping elements on one or more disc plates catching elements are arranged in the immediate vicinity of the damping elements on one or more of the panes.

Figure 4 shows an alternative embodiment of the Dämpfungselemen te 12 shown in Figure 2, wherein only a single damping element is shown in Figure 4. FIG. 4 shows, in a cross-sectional view, a quick-acting closure device by means of which the milling drum box 9 can be mounted and dismounted on the underside of the machine frame 3 of a ground milling machine 1, as shown for example in FIG. For this purpose, a holding device 30 is provided, with a movable locking element 31 on the machine frame 3 and a locking projection 32 which is fixedly connected to the Fräswalzenkasten 9, which is not shown in detail in Figure 4. FIG. 4 shows the released position of the holding device 30. Are the milling drum box 9 and the machine 3 closer in the vertical direction, engages the cone-shaped centering in a corresponding recess on the machine frame and causes an exact relative positioning of the Fräswalzenkastens relative to the machine frame such that the lever of the bewegba ren locking element the locking projection 32 during an extension of recognizable in Figure 4 cylinder engages behind and thus in particular in the vertical direction the milling rollers boxes 9 on machine frame 3 sets in the present embodiment, it is now provided that the parts of the holding device 30 on the side of the Fräswalzenkastens 9, specifically the locking projection 32 and the centering 33, completely and exclusively on the damping element 12 are connected boxes with the remaining milling rollers. About the not shown in Figure 4 milling drum in the milling operation resulting vibrations that are transmitted to the Fräswalzenkasten 9 are thus attenuated by the damping element to the machine frame 3 and in particular to the holding device 30, so that the vibration load of the holding device 30 and the rest of the rest Ground milling machine 1 is considerably reduced. It is understood that the embodiment shown in Figure 4 may be present in a multiplicity of numbers on a milling drum box 9, in particular in the arrangement described above for the damping elements 12.

The embodiment of Figure 4 further includes a monitoring device 34, with which the state of the damping element 12 can be monitored during the milling operation. Specifically, the monitoring device 34 includes, for example, a sensor element 35 in the form of a contactless distance meter, a control unit 36 and display devices 37 and 38. The sensor element 35 measures from the machine frame 3 from the distance in the present case, for example, the upper outer surface of the damping element 12. Tires the damping element 12th or even tearing, this distance increases in extreme cases, or beyond a predetermined threshold beyond. To evaluate the distance data obtained with the sensor element 35, this is connected to the control unit 36. If this determines a non-permissible state of the damping element 12, in particular with regard to impermissible fatigue / elongation or tearing, it controls a visual display device 37, for example a display, and / or an acoustic display device 38, for example a loudspeaker, for outputting a corresponding one Display or warning signal on. The Anzeigeeinrichtun conditions 37 and / or 38 are preferably located within the control station of the ground milling machine 1. Additionally or alternatively, other variables can be monitored, such as the temperature of the damping elements, etc.

Finally, FIG. 5 shows a further exemplary embodiment of the invention. An essential difference from the embodiment described in FIG. 3 lies in particular in the concrete one Embodiment of the drive bearing 26 and arranged on this side damping elements of 23. The arranged on the opposite side of the plate disc 1 7A damping elements 21 are formed analogously to Figure 3 and hidden in the partial cross-sectional view of Figure 5. In the present embodiment, the milling drum 10, to which in FIG. 5, for reasons of clarity, the milling tools positioned on the outer lateral surface 15 are not shown, for transmission of motion from the housing 20 to the support tube 14 a spur gear teeth 39 with a ring gear 40 fixedly connected to the housing 20 and a with the plate disc 1 7B of the milling drum 10 to complementary trained sprocket 41. In connection with the present invention, it is now essential that the milling roller-side sprocket 41 is connected via a ring-shaped damping element 23 with the washer 17 B, so in particular at this point the transmission of vibrations from the support tube 14 and the milling tools mounted thereon be attenuated to the remaining ground milling machine 1 and in particular to the machine frame out. In principle, it is also possible that the damping element between the sprocket 41 and the corresponding attachment to the housing 20 is positioned.

All of the above embodiments illustrate that the one-piece support tube comprehensive milling drum as a whole against the machine frame of the Bodenfräsmaschine either by damping elements between the milling drum and the storage of the milling drum in the milling rollers and / or boxes by damping elements between the milling rollers and the machine frame so is arranged to be transmitted to the milling drum in the milling process resulting vibrations attenuated to the machine frame. The invention thus expressly deals with this type of vibration attributable to the milling process itself and not other vibrations, for example, due to the operation of the internal combustion engine, etc.

Claims

1 . Self-propelled floor milling machine (1), in particular road milling machine, stabilizer, or recycler, comprising

a machine frame (3) carried by driving devices (2),

a drive motor (4) arranged on the machine frame (3),

a control station (5) arranged on the machine frame (3),

- One of the drive motor (4) driven milling device (7) with an open at least to the bottom and with the machine frame (3) connected Fräswalzenkasten (9) and within the Fräswalzenkastens (9) rotatable about a horizontal and transverse to a direction and to the bottom of the milling rollers boxes (9) in milling partially protruding milling drum (10) with a support tube (14) and a plurality of arranged on an outer surface (15) of the support tube milling tools (16), wherein a drive train (11) is present, the driving energy generated by the drive motor (4) for driving the rotational movement of the milling drum (10) in the milling operation, characterized in that

in that a vibration damping device is arranged between the machine frame (3) and the entire milling drum (10) such that vibrations arising on the support pipe during the milling operation are damped towards the machine frame (3), wherein the vibration damping device comprises at least one box (9) between the milling rollers. and the machine frame (3) arranged damping element (12).

2. ground milling machine (1) according to claim 1,

characterized,

the vibration damping device comprises a rubber buffer and / or a silentbloc.

3. Ground milling machine (1) according to one of the preceding claims,

characterized,

in that a plurality of damping elements (12) are arranged between the milling drum box (9) and the machine frame (3), which are arranged mirror-symmetrically in pairs and with respect to a vertical plane of symmetry extending in the longitudinal direction and / or in the transverse direction.

4. Floor milling machine (1) according to one of the preceding claims,

characterized,

in that the at least one damping element (12) is connected directly to a rear wall and / or top wall and / or front wall of the milling drum box (9) or to a holding device (30) fixedly connected to the rear wall and / or top wall and / or front wall of the milling drum box (9). is attached.

5. Ground milling machine (1) according to one of the preceding claims,

characterized,

in that the at least one damping element (12) is fastened directly on the machine frame (3) or on a holding device (30) fixedly connected to the machine frame (3) and / or that the at least one damping element (12) is fixed on its connection to the machine frame ( 3) or on the milling rollers boxes (9) opposite side has a fastening part of a releasable fastening device with which the Fräswalzenkasten (9) releasably on the machine frame (3) can be fastened.

6. Floor milling machine (1) according to one of the preceding claims,

characterized,

in that the milling drum (10) is connected to a rotary bearing (22) in which the milling drum (10) rotates about its axis of rotation and / or to a drive bearing (24) in which the milling drum (10) is connected to the drive train (11) is connected via at least one damping element (12) of the vibration damping device.

7. Ground milling machine (1) according to claim 6,

characterized,

in that the connection comprises a plurality of damping elements (12), the plurality of damping elements (12) being positioned point-symmetrically with respect to the axis of rotation in a plane perpendicular to the axis of rotation of the milling drum (10).

8. Ground milling machine (1) according to one of claims 6 or 7,

characterized,

in that the milling drum (10) comprises at least one internal dish washer (17), wherein the at least one damping element (12) faces the rotary bearing (22) and / or the drive bearing (24) towards the milling drum (10) with the dish washer (17), in particular via a screw, connected.

9. Bodenfräsmaschine (1) according to claim 8,

characterized,

the rotary bearing (22) is a floating bearing and / or the drive bearing (24) is a fixed bearing.

10. Ground milling machine (1) according to one of claims 8 or 9,

characterized,

in that the connection of the milling drum (10) to the drive bearing (24) takes place via at least two damping elements (12) which are connected to the disk disk (17) which in the axial direction of the disk disk (17) to an end face of the milling drum (10) protrude, and the ih rer the disc (17) opposite side with an inside of the support tube (14) arranged outer housing of a planetary gear of the drive train (11) are connected.

11. Ground milling machine (1) according to one of claims 8 to 10,

characterized,

in that the at least one damping element (12) to the drive bearing (24) is positioned farther outward in the radial direction to the rotation axis of the milling drum (10) than the at least one damping element (12) to the rotation bearing (22).

12. Ground milling machine (1) according to one of the preceding claims,

characterized,

a monitoring device (34) is provided, which is designed such that it monitors the state of the at least one damping element (12).

13. ground milling machine (1) according to claim 12,

characterized,

in that the monitoring device (34) comprises a control unit (36) which is designed such that it fulfills at least one of the following features:

- It controls a display device such that it outputs a visually and / or visually perceptible display signal, at least in the case of a detected defect of at least one damping element (12);

it intervenes in the machine operation in such a way that it controls a working and / or driving parameter of the ground milling machine (1) in the case of a detected defect of the at least one damping element (12), in particular solves a detachable coupling connection within the drive train (11) and / or lowers a milling roll speed to a predetermined maximum value and / or triggers a machine stop with respect to the milling and / or ferrying operation of the ground milling machine (1) and / or lowers a feed of the ground milling machine (1) to a predetermined maximum value in the milling operation;

- It monitors the Cesamtbetriebszeit, in particular with regard to operating hours and / or operating time, the at least one damping element (12) and controls a display device such that they visually and / or visually perceptible at least in the case of reaching or exceeding a specified number of operating hours and / or use Indicator signal outputs.

14. Ground milling machine (1) according to one of the preceding claims,

characterized,

that a, in particular mechanically acting, catching device (27) is provided which is designed such that in the case of a defective damping element (12) the milling drum (10) essentially in its relative position to the milling drum box (9) or the milling drum box (9) substantially in position relative to the machine frame (3) relative to a desired position.

15. ground milling machine (1) according to claim 14,

characterized,

in that the catching device (27) has a positive locking device which acts in the vertical direction and comprises at least one catching element (28), the positive connection between the catching ring (28) and a further catching element (29) only when at least one damping element (12) is defective.