DE102021118688A1 - SELF-PROPELLED TILLER, ADAPTER KIT FOR A TILLER AND METHOD FOR INCREMENTALLY MOVING AND/OR INCREASING LIFT RANGE - Google Patents

Abstract

The invention relates to a self-propelled ground milling machine, comprising a machine frame, a control stand, a drive motor, a ground milling device with a milling drum arranged inside a milling drum housing and rotatable about an axis of rotation, front and rear driving devices, with at least the front and/or the rear driving devices being mounted vertically adjustable lifting devices are connected to the machine frame and the lifting devices adjustable in the vertical direction each have an actuator that drives the adjustment movement. The invention also relates to an adapter set for a self-propelled ground milling machine and a method for incrementally shifting and/or enlarging the lifting range of a lifting device of a ground milling machine comprising a cylinder-piston unit.

Description

The invention relates to a self-propelled ground milling machine. The invention also relates to an adapter set for a self-propelled ground milling machine and a method for incrementally shifting and/or enlarging the lifting range of a lifting device of a ground milling machine comprising a cylinder-piston unit.

Essential elements of a self-propelled ground milling machine of this type are a machine frame, which forms the main supporting structure of the machine, a control station, from which the operation of the ground milling machine is essentially carried out, a drive motor or primary drive unit, for example an internal combustion engine, and a ground milling device with a inside a milling drum box arranged and rotatable about an axis of rotation milling drum. Finally, the ground milling machine also includes front and rear travel devices, such as wheels and/or chain drives, driven in particular by the drive motor, in particular viewed from the front in the forward travel direction. The front and/or rear, in particular all, driving devices are connected to the machine frame via lifting devices, in particular so-called lifting columns. As a result, the distance between the machine frame and the ground can be adjusted in the vertical direction, so that, for example, the milling depth can be varied by adjusting the stroke of the machine frame. Such a machine is for example in the DE102014019168A1 disclosed. The soil milling device comprises a milling drum for milling soil material and a milling drum box for covering the milling drum on the sides and on top. The milling drum is typically mounted within the milling drum box about a horizontal axis of rotation running transversely to the working direction and, when dipping into the ground, cuts up soil material. The milling drum is usually supplied with drive energy by the drive unit of the ground milling machine, for example via a mechanical (in particular traction drive, such as a belt or chain drive) or hydraulic drive train. The ground milling device can be detachably fastened to the machine frame via a fastening device that holds the milling drum box on the ground milling machine. Such ground milling machines are, for example, from DE102015016678A1 known.

To adjust the stroke of the machine frame, it is known to use linearly adjustable actuators, in particular hydraulically adjustable cylinder-piston units, which can be provided in addition to a mechanically acting linear guide, usually in the form of interlocking sleeves. Such an arrangement is for example in DE102014019168A1 described. The respective actuator, usually a linear actuator, in particular a hydraulically actuable cylinder-piston unit, drives the adjustment movement. The linear guide, in particular in the form of interlocking sleeves, on the other hand absorbs horizontal supporting forces in order to ensure a guided linear adjustment between the respective travel devices and the machine frame in the vertical direction. Such lifting devices are usually firmly anchored to the machine frame on the machine side. As a result, tension can occur within the actuator, which can lead to increased wear and even to the functional failure of the respective lifting device.

Irrespective of this, the lifting devices usually used have a fixed lifting range relative to the machine frame, due to their design, within which they can be adjusted. However, operating situations can arise in which it is desirable to move and/or increase this lifting range relative to the machine frame, for example to enable deeper milling depths and/or to facilitate replacement processes of the milling drum box on the rest of the machine.

Proceeding from this, it is the object of the invention to specify a lifting device with reduced susceptibility to wear for a ground milling machine and/or a lifting range that can be displaced and/or enlarged relative to the machine frame.

The task is solved with a ground milling machine, an adapter set and a method according to the independent claim. Preferred developments are specified in the dependent claims.

A self-propelled ground milling machine of the generic type thus comprises, in particular, a machine frame, a control station, a drive motor, a ground milling device with a milling drum arranged inside a milling drum box and rotatable about an axis of rotation, and front and rear driving devices, with at least one of the front and/or the rear driving devices being in Vertically adjustable lifting devices are connected to the machine frame and the vertically adjustable lifting devices each have an actuator driving the adjustment movement. The arrangement can be such that only a front driving device or only a rear driving device is provided. Ideally, the front and rear driving devices are respectively available in pairs. The front and/or the rear driving devices preferably each have a lifting device. It can also be provided that only the rear or only the front, but preferably all of the existing driving devices are each connected to the machine frame via a lifting device.

The actuator, usually a cylinder-piston unit, includes a connection point to the respective driving device (on the side of the driving device) and a connection point to the machine frame (on the side of the machine frame). According to the invention, it is now provided in a first aspect of the invention that the actuator of the at least one lifting device is connected to the machine frame via a joint bearing with the machine frame. In this way, the part of the actuator that faces the machine frame is movable to at least a certain extent relative to the machine frame and is no longer fixed rigidly to it. In this way, the actuator can change its position relative to the machine frame and in particular with regard to its linear adjustment axis in one and preferably several degrees of freedom. Ideally, the pivot bearing allows tilting movements in one or more horizontal directions or in a vertical plane, starting from the pivot bearing. Inaccuracies in the connection of the actuator to the machine frame that occur specifically due to manufacturing tolerances can be compensated for in this way by the mobility of the machine-side actuator part that is now possible, so that overall a wear-optimized bearing system for the machine frame is obtained. It goes without saying that the statements made below regarding at least one lifting device apply in the same way to the other lifting devices present on the ground milling machine.

The joint bearing is preferably designed in such a way that the actuator or at least the machine-side actuator part can be moved relative to the machine frame at least about a horizontal axis in and/or counter to the direction of travel and/or transversely to the direction of travel. For this purpose, it is particularly preferred if the joint bearing is a swivel joint bearing or a ball joint bearing. The joint bearing is thus preferably designed in such a way that rotary and/or tilting movements are possible. The joint bearing should preferably not allow translational movements along an adjustment axis or curve.

The joint head of the ball joint bearing is preferably arranged on the side of the lifting device and the joint socket of the ball joint bearing on the side of the machine frame.

The spherical bearing can be used as a preferred location for one or more sensors to collect certain operating data. For example, the weight acting on this joint can be determined, for example by means of a force measuring bolt and/or a strain gauge. If such sensors are arranged on several or even all lifting devices of the ground milling machine, it is possible, for example, to determine and/or monitor the tilting position of the machine, which can ultimately be used to prevent the machine from tipping over and/or to indicate potentially dangerous inclined positions of the machine frame. Depending on this, other interventions can also be made via a suitable control unit in the machine control, such as switching off/blocking oscillation of two axles, in particular the rear axles, etc.

The specific design of the bearing point on the machine frame can basically be varied in many ways. However, it is advantageous if there is a bearing bracket on the machine frame for connecting the joint bearing. A bearing bracket designates an essentially U-shaped, in particular one-piece, bearing device. The actuator is preferably connected to this bearing bracket in the area between the two legs of the bearing bracket.

The bearing bracket can have two connection flanges spaced apart from one another for attachment to the machine frame and a bearing receiving area between the two connection flanges. The attachment of the bearing bracket to the machine frame, which is rigid per se, can be designed to be detachable, for example by means of suitable screw connections. The screw connections preferably run in the vertical direction with respect to their screw-in axis. The bearing bracket can preferably be arranged on the machine frame in such a way that its bearing receiving area protrudes in the vertical direction in relation to the connection flanges, in particular upwards, and the two connection flanges are in particular arranged in such a way that they are subjected to tensile stress when the floor milling machine stands up on the ground. This allows the ground milling machine to be configured in a compact manner in terms of its vertical extent, while at the same time having a comparatively large lifting range.

Ideally, the two connecting flanges are spaced apart from one another in the direction of travel or transversely to the direction of travel.

With regard to the specific configuration of the lifting device, there is a large number of preferred developments. The actuator is preferably a particularly hydraulically driven cylinder Piston unit, in particular the piston part being arranged towards the driving device and the cylinder part being arranged towards the machine frame. The connection of the actuator to the driving device is thus preferably via the piston part and the connection to the machine frame is preferably via the cylinder part of the cylinder-piston unit. In addition or as an alternative, the lifting device comprises a linear guide that is separate from the actuator and has a first guide part that is stationary with respect to the machine frame and a second guide part that is stationary with respect to a bearing for a travel device, for example a chain drive console. For this purpose, the linear guide can have two intermeshing guide sleeves, with the lower guide sleeve being arranged in a stationary manner in relation to a traveling device bearing, in particular a chain drive console, and the upper guide sleeve being arranged in a stationary manner in relation to the machine frame. In addition to or as an alternative to the driving device, the actuator can also be mounted via a joint bearing, in particular on a driving device bearing. In this way, a relative movement about a lower bearing point of the actuator relative to the driving device bearing is possible. In this case, too, it can in particular be a swivel joint or ball bearing.

The ground milling machine preferably includes an adapter set for incremental displacement and/or adjustment of the lifting range of the ground milling machine. Such an adapter set can include a spacer that can be inserted between a cylinder-piston unit and a cylinder-piston unit receptacle, a cylinder extension piece and/or a piston extension piece. A cylinder extension piece and/or a piston extension piece (both can also be referred to as “actuator extension piece” for connection to the actuator) can include a bearing element on the machine frame that is adapted to the actuator extension piece. One or more extension pieces for linear guides of the lifting device, in particular guide sleeves, can also be included. What is essential for the extension pieces used here is in particular that they preferably have at most the outer circumference transverse to the linear adjustment axis of that element to which they are attached to extend the same. Ideally, the extension pieces have a cross-sectional profile that is identical to this element, at least at the contact point. With the help of the adapter set, the vertical distance of the actuator to the bearing point of the pivot bearing can be adjusted and/or adjusted in steps/increments corresponding to the vertical length of the adapter or the extension pieces and/or the stroke range of the actuator can be increased. If the interlocking functional elements of the lifting device, i.e. the cylinder and the piston, are lengthened, the lifting range of the cylinder-piston unit increases. If, on the other hand, a spacer is used between the lifting device and the machine frame or the driving device, the lifting range of the lifting devices is shifted relative to the machine frame. Combinations are also possible. Likewise, different adapter sets with different extension and/or displacement heights can also be provided.

In this way, the vertical range of motion of the ground milling machine can be changed and, for example, adapted to different machine setups. If such an adapter piece or actuator extension piece is built into the lifting device or the actuator, which increases the lifting range, it can be provided that an adapted spacer or an adapted bearing element is used on the machine frame for mounting the actuator at the same time, in order to ensure that the machine frame can be lowered to its maximum milling depth. The task of the exchangeable bearing element is therefore essentially to ensure that the maximum milling depth is maintained with different actuator extension pieces used or to compensate for the height offset of the joint bearing in the vertical downward direction gained through the actuator extension piece used.

Various connecting devices can be used to attach the individual extension pieces, in particular screw-threaded connections, positive and/or non-positive connections, in particular using additional fixing elements such as screws, bolts, etc.

The adapter set of the ground milling machine can include an actuator extension piece that can be inserted between a cylinder unit and a cylinder receptacle of a cylinder-piston unit. In addition or as an alternative, the adapter set can also have a bearing element arranged on the machine frame so that it can be removed, in particular a bearing bracket that can be mounted on the machine frame.

Another aspect of the invention relates to an adapter set for a self-propelled floor milling machine, in particular for a floor milling machine according to the invention, for incremental displacement and/or enlargement of the lifting range of a lifting device of the floor milling machine comprising a cylinder-piston unit, and a floor milling machine with such an adapter set. For the formation of a generic floor milling machine, reference is made to the Offenba mentioned at the outset tion related to the state of the art. The ground milling machine can also be designed with a joint bearing according to the invention. The relevant statements above are hereby also referred to.

In order to increase the stroke range, it can now be provided that a cylinder extension piece for lengthening a cylinder of the cylinder-piston unit and a piston extension piece for lengthening a piston of the cylinder-piston unit are present. These extension pieces are characterized by the fact that they can be retrofitted to the cylinder/piston of an already functioning cylinder-piston unit and can also be removed again without destroying it. They are used in the functional area of the cylinder-piston unit, i.e. in an area in which the piston can be moved into the cylinder. If the extension pieces are mounted, the cylinder-piston unit has a larger total stroke range in the direction of the linear adjustment axis than without the extension pieces. For the possible design of the attachment, reference is made to the previous statements.

Preferably, the cross-sectional contour of the extension pieces, at least the outer contour of the cross section of the extension pieces perpendicular to the adjustment direction of the cylinder-piston unit, is identical to the contour of the cylinder and/or the piston that is in contact with the extension piece when installed.

To shift the stroke range, a spacer can be arranged to be inserted at the head and/or foot area of the cylinder-piston unit at the connection point of the cylinder-piston unit to a machine frame and/or to a driving device. In contrast to the extension pieces, the spacer is not used in the functional area of the cylinder-piston unit, but above or below. This shifts the existing stroke range of the cylinder-piston unit relative to the machine frame, but does not change its absolute stroke range.

Finally, a further aspect of the invention relates to a method for incrementally shifting and/or increasing the lifting range of a lifting device of a floor milling machine comprising a cylinder-piston unit, in particular a floor milling machine according to the invention, particularly using an adapter set according to the invention. In order to increase an existing stroke range of a cylinder-piston unit, a cylinder of the cylinder-piston unit is lengthened with a cylinder extension piece and a piston of the cylinder-piston unit is lengthened with a piston extension piece. For the exemplary specific design of the extension pieces, reference is made to the previous statements. Further steps can also be the lengthening of one or more guide elements, such as guide sleeves, the adjustment of measuring sensors and/or a control unit of the ground milling machine, etc.

For an alternative or additional shifting of the lifting range, the invention provides for a spacer to be inserted in the head and/or foot area of the cylinder-piston unit toward a machine frame and/or toward a driving device. The cylinder-piston unit is thus displaced as a whole relative to the machine frame and/or the driving device up or down. Such a spacer can be designed in the form of a bearing bracket. This modification can also be accompanied by further adjustments, for example with regard to sensors and/or the control unit of the ground milling machine.

• 1: Eine Seitenansicht auf eine Bodenfräsmaschine,
• 2 eine Draufsicht auf die Bodenfräsmaschine aus 1;
• 3: eine Seitenteilschnittansicht auf eine Hubeinrichtung mit Kettenlaufwerk; und
• 4: eine Seitenteilschnittansicht auf die Hubeinrichtung aus 3 mit eingesetzen Verlängerungsstücken.

The invention is explained in more detail below with reference to the exemplary embodiments illustrated in the figures. They show schematically:

• 1 : A side view of a floor milling machine,
• 2 a top view of the floor milling machine 1 ;
• 3 : a side partial sectional view of a lifting device with chain drive; and
• 4 : a partial side sectional view of the lifting device 3 with inserted extension pieces.

Identical components are denoted by the same reference symbols in the figures, although not every component that is repeated in the figures is necessarily marked with a reference symbol in each figure.

1 shows a ground milling machine 1 in a side view, specifically on the right side of the machine in relation to the forward direction A. The essential elements of the ground milling machine 1 are a machine frame 2, a drive motor 3, a ground milling device 4, front driving devices 5, rear driving devices 6 and a control station 7 . The soil milling device comprises a milling drum box 8, inside which a (in 1 dashed line indicated) milling drum 9 is present. This can include a hollow-cylindrical support tube, on the outer surface of which a multiplicity of milling tools are arranged. the Milling drum 9 is rotatable about a horizontal axis of rotation R running transversely to the forward direction A. In the milling operation, the milling drum 9 engages in the ground and mills up ground material. The resulting milled material is collected in the milling drum box 8 and can then be loaded via transport devices 10 and 11, for example onto a transport vehicle. The transport device 10 can be an internal conveyor belt, whereas the transport device 11 can be a so-called external or trailer conveyor belt. The exemplary embodiment shown in the figures shows a ground milling machine 1 in which the ground milling device 4 is arranged between the front driving devices 5 and the rear driving devices 6 as seen in the forward direction A. However, the invention also extends to such ground milling machines in which the ground milling device 4 is arranged at the level of the rear driving devices 6 seen in the forward direction A, as is the case with so-called tail rotor milling machines.

The driving devices 5 and/or 6 can be connected to the machine frame 2 via lifting devices, for example lifting columns 12 in the present case. By adjusting the height of the lifting columns 12, the vertical spacing of the machine frame and thus, in the present example, the immersion depth of the milling drum 9 in the ground can be varied. In the present case, all of the front and rear driving devices 5/6 are each connected to the machine frame 2 via such a lifting column 12 . Embodiments are also conceivable in which only the front or only the rear driving devices are connected to the machine frame via corresponding lifting columns.

The drive energy required to operate the ground milling machine 1 is provided by the drive motor 3 . This can be arranged in the rear of the machine, such as in the 1 shown.

The self-propelled ground milling machine 1 is controlled and operated from the control station 7 . The operator's stand 7 includes a floor area and various operating units. During driving and milling operations, the machine operator is in the area of the control station 7 and can control the essential machine functions from there, such as driving operation, the operation of the floor milling device 4, the lifting columns 12 and the transport devices 10 and 11. In the milling operation, the ground milling machine 1 usually moves in the forward direction A, so that this direction can also be referred to as the working direction.

3 illustrates an exemplary structure of one of the lifting columns 12. The driving device 5, which is a chain drive in the present case, can be mounted in a bearing bracket 20. FIG. A lower guide sleeve 21 is connected to the bearing bracket 20, for example rigidly. A joint bearing 22 is also present on the bearing bracket 20, via which an actuator 23 is mounted so as to be adjustable about a joint axis, for example horizontal. The joint axis is then preferably arranged on the actuator 23 side. The joint bearing 22 can also be designed as a ball joint bearing, in which case the joint ball is preferably arranged on the actuator 23 side. A sensor element can be arranged here, for example a force measuring bolt, etc. The lower guide sleeve 21 runs on the inside in an upper guide sleeve 24, which is rigidly attached to the in 3 only indicated by dashed lines machine frame 2 is connected. In 3 (and also in the following 4 ) the lower guide sleeve 21 and the upper guide sleeve 24 are shown cut open to illustrate the structure of the lifting column 12. The lower guide sleeve 21 and the upper guide sleeve 24 together form a linear guide, here along a vertical adjustment axis B.

Arranged in the interior space enclosed by the lower guide sleeve 21 and the upper guide sleeve 24 is the actuator 23, which is a cylinder-piston unit 25 with a cylinder part 26 and a piston part 32 that is linearly adjustable relative thereto. The actuator 23 is mounted on a pivot bearing 27 towards the machine frame 2 . The joint bearing 27 is carried by a bearing bracket 28 which is rigidly connected to the machine frame 2 via two bearing flanges 29 via screw connections 30 . The joint bearing 27 can be designed as a ball joint bearing, in which case the joint ball can be positioned on the side of the cylinder part 26 and the ball socket on the side of the bearing bracket 28 .

3 makes it clear that the joint bearing 27 preferably protrudes upwards in the vertical direction in relation to the flange points of the bearing flanges 29 . The flange points of the bearing bracket 28 to the machine frame 2 are thus arranged lower in the vertical direction.

Overall, the actuator 23, specifically in relation to the cylinder part 26, is articulated via the joint bearing 27 and is therefore arranged so that it can move relative to the machine frame 2 within an adjustment range and is thus to a certain extent dependent on the linear adjustment movement that is caused by the lower guide sleeve 21 and the upper guide sleeve 24 or is guided by the linear guide device of the lifting column 12, decoupled, so that consequent tensions can be reduced to. For this purpose, the actuator 23 can be adjusted with its adjustment axis in a vertical plane relative to the machine frame 2 and/or the linear adjustment axis of the guide sleeves.

4 illustrates the possibility of being able to change the lifting height of the lifting device, specifically the lifting column 12, incrementally and being able to move the lifting range relative to the machine frame. In order to achieve this, it can be provided that an adapter piece 31 or a cylinder extension piece that can be dismantled without destroying it in the vertical direction above or below (both variants are shown in the 4 shown) can be reversibly fastened to the cylinder part 26, in particular rigidly, and is connected to it, so that the cylinder part 26 as a whole is lengthened with it by the height ΔH1 along the vertical adjustment axis. The piston part 32 can also be correspondingly lengthened with a piston extension piece 33, specifically by the amount ΔH3. Here, too, such an extension can be attached to the lower and/or upper end in the vertical direction. Overall, these measures with the extension pieces 31 and 33 increase the overall stroke distance or the maximum stroke range of the cylinder-piston unit that can be represented.

The extension of the piston and cylinder shown via the adapter pieces 31 and 33 can be further supplemented by also using extension pieces 34 (on the outer sleeve 24) and 35 (on the inner sleeve 21) of the guide device of the lifting column, which then extend them around the Extend amounts ΔH4 and ΔH5.

In addition or as an alternative, however, the relative position of the lifting device can also be shifted relative to the machine frame 2 and/or to one of the travel devices. For this purpose, a spacer, in this case for example the extended bearing bracket 28, can be inserted and/or exchanged. 4 clarifies that the vertical legs of the bearing bracket in 4 are extended further by the height ΔH2 than in 3 the case is. In the present case, the height ΔH1 corresponds to the height ΔH2, although these can also differ from one another. As a result, the bearing point of the joint bearing 27 on the machine frame 2 is shifted upwards in the vertical direction. In addition or as an alternative, one or more intermediate pieces could also be used above and/or below the cylinder-piston unit.

Overall, that allows for 4 described adapter set, for example, to increase the lifting range of the actuator 23 in the vertical direction and/or to move the lifting range of the actuator 23 relative to the machine frame 2 in the vertical direction.

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102014019168 A1 [0002, 0003]
• DE 102015016678 A1 [0002]

Claims (12)

Self-propelled ground milling machine (1), comprising - a machine frame (2), - a driver's stand (7), - a drive motor (3), - a ground milling device (4) with a rotary axis (R) arranged inside a milling drum box (8) rotatable milling drum (9), - front (5) and rear (6) travel devices, at least the front and/or the rear travel devices (5, 6) being connected to the machine frame (2) via vertically adjustable lifting devices and at least one the lifting device adjustable in the vertical direction has an actuator which drives the adjustment movement, characterized in that the actuator is connected to the machine frame via a joint bearing with the machine frame. Self-propelled soil milling machine according to claim 1 , characterized in that the joint bearing is designed such that the actuator is movable relative to the machine frame at least about a horizontal axis in and/or counter to the direction of travel and/or transversely to the direction of travel. Self-propelled ground milling machine according to one of the preceding claims, characterized in that the joint bearing is a swivel joint bearing or a ball joint bearing. Self-propelled ground milling machine according to one of the preceding claims, characterized in that a joint head is arranged on the side of the lifting device and a joint socket on the side of the machine frame. Self-propelled ground milling machine according to one of the preceding claims, characterized in that there is a bearing bracket on the machine frame for connecting the joint bearing. Self-propelled floor milling machine according to one of the preceding claims, characterized in that the bearing bracket has two connection flanges spaced apart from one another for attachment to the machine frame and a bearing receiving area between the two connecting flanges, the bearing receiving area protruding in the vertical direction relative to the connecting flanges and the two connecting flanges being arranged in particular in such a way that they are loaded in tension. Self-propelled soil milling machine according to claim 6 , characterized in that the two connection flanges are spaced apart from one another in the direction of travel or transversely to the direction of travel. Self-propelled floor milling machine according to one of the preceding claims, characterized in that the lifting device comprises at least one of the following features: - the actuator is a cylinder-piston unit, in particular the piston part being arranged towards the direction of travel and the cylinder part towards the machine frame; the lifting device comprises a linear guide separate from the actuator with a first guide part that is stationary with respect to the machine frame and a second guide part that is stationary with respect to a bearing of a travel device; - The linear guide comprises two interlocking guide sleeves, in particular the lower guide sleeve being fixed to a driving device bearing and the upper guide sleeve being fixed to the machine frame; - The actuator is also mounted towards the driving device via a joint bearing, in particular on a driving device bearing. Self-propelled floor milling machine according to one of the preceding claims, characterized in that it has an adapter set for incremental displacement and/or adjustment of the lifting range of the floor milling machine, comprising an actuator extension piece for connection to the actuator and a bearing element on the machine frame adapted to the actuator extension piece. Self-propelled soil milling machine according to claim 9 , characterized in that the adapter set comprises at least one of the following features: - a spacer insertable between a cylinder-piston unit and a cylinder-piston unit receptacle, a cylinder extension piece and/or a piston extension piece; - a demountable arranged on the machine frame bearing element; - a bearing bracket that can be mounted on the machine frame. Adapter set for a self-propelled floor milling machine, in particular according to one of Claims 1 until 10 for incrementally shifting and/or increasing the stroke range of a lifting device of the floor milling machine comprising a cylinder-piston unit, comprising a) to increase the stroke range: - a cylinder extension piece for lengthening a cylinder of the cylinder-piston unit and - a piston extension piece for lengthening a piston of the cylinder-piston unit, and/or b) to shift the stroke range: - a spacer for insertion at the head and/or foot area of the cylinder-piston unit at the connection point of the cylinder-piston unit to a machine frame and/or to a driving device. Method for incrementally shifting and/or enlarging the lifting range of a lifting device, comprising a cylinder-piston unit, of a floor milling machine, in particular a floor milling machine according to one of Claims 1 until 10 , especially using an adapter set according to claim 11 , comprising the steps: - to increase the stroke range a) lengthening a cylinder of the cylinder-piston unit with a cylinder extension piece; and b) extending a piston of the cylinder-piston unit with a piston extension piece; and/or - to shift the lifting range c) inserting a spacer in the head and/or foot area of the cylinder-piston unit towards a machine frame and/or towards a driving device.

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