EP4006233A1 - Roller tool for a soil working roller - Google Patents

Abstract

A roller tool for a soil tillage roller of a soil tillage machine, comprising a tool carrier (46) to be fixed to an outer peripheral side of a carrier casing (26) of a soil tillage roller (20), a change holder (34) to be detachably fixed to the tool carrier (46) and a change holder (34) changing tool (70) to be detachably fixed.

Description

The present invention relates to a roller tool for a soil tillage roller of a soil tillage machine and a soil tillage roller and a casing for a soil tillage roller with the plurality of such roller tools.

From the WO 2013/107545 A2 discloses an interchangeable holder to be fixed by welding on the outer circumference of a roller shell of a compactor roller for an interchangeable tool constructed, for example, in the manner of a chisel or a padfoot. The change holder has a trapezoidal contour in a side view and provides a change tool receiving opening in a central region, in which a tool shank of a change tool to be fixed on the change holder can be positioned and engage.

It is the object of the present invention to provide a roller tool for a soil tillage roller of a soil tillage machine which, with a structurally simple design, enables an exchangeable tool to be easily replaced independently of a state of wear.

According to the invention, this object is achieved by a roller tool for a soil tillage roller of a soil tillage machine, comprising a tool carrier to be fixed on an outer peripheral side of a carrier casing of a soil tillage roller, a change holder to be detachably fixed to the tool carrier and a change tool to be detachably fixed to the change holder.

In the construction of a roller tool according to the invention, not only is the interchangeable tool to be replaced after wear or to be changed for another tillage operation detachably coupled to a tillage roller, but also the change holder that accommodates the change tool. Such an interchangeable tool holder is also subject to massive wear in soil tillage operations, so that, on the one hand, such a worn interchangeable tool holder can be easily replaced and, on the other hand, the possibility of being able to detach the interchangeable toolholder itself from the carrier casing also makes it easy to replace an interchangeable tool, regardless of the condition of the interchangeable toolholder is to realize. Only the tool carrier is firmly coupled to the carrier jacket, for example by welding, which is protected by the change holder against external influences and is therefore essentially not subject to wear. This also makes it possible to construct such a tool carrier with a material that is particularly suitable for the connection to the carrier jacket, but may be less resistant to wear than the construction material to be used for the change holder or the change tool.

It should be pointed out that, in the context of the present invention, the non-detachable connection of the tool carrier to the carrier casing means that the tool carrier cannot be detached from the carrier casing in order to exchange a change tool and/or a change holder. This non-detachable connection can be made, for example, by material connection, ie for example welding, so that this connection generated by material connection would have to be destroyed in order to be able to detach a tool carrier from the carrier casing. In principle, however, the non-detachable connection could also be made by screwing, in which case this screw connection cannot be loosened either, i.e. the tool carrier remains on the carrier jacket if a change tool or a change holder is to be detached from the carrier jacket and replaced.

In order to be able to easily detachably couple the change holder to the tool carrier on the one hand, but also to be able to integrate the change tool into the change holder on the other hand, it is proposed that the change holder comprises two change holder body parts, with the change holder fixed to the tool carrier containing the two change holder body parts form a tool carrier accommodating tool carrier accommodating space and through Fasteners are set on the tool carrier. The tool carrier accommodated in the tool carrier receiving space and thus surrounded by the change holder is thus shielded against external influences.

For a structure that is easy to implement and stable in operation with as few different components as possible, it is proposed that the two toolholder body parts be constructed essentially identically to one another and/or that each toolholder body part be a tool carrier that provides part of the tool carrier receiving space -Has a receiving recess, or/and that each change holder body part has a carrier jacket contact surface to be positioned facing an outer peripheral side of a carrier jacket and adapted to an outer peripheral contour of the carrier jacket.

An external influence, also on the fastening organs that fix the tool holder body parts on the tool carrier, can be largely avoided by the fact that each tool holder body part can be fixed to the tool carrier by at least one fastening element, preferably two fastening elements, with each tool holder body part being assigned to each of these on the fastener that fixes the tool carrier, has a fastener reach-through opening with an enlarged fastener head receiving area.

In an embodiment that is particularly advantageous for a stable connection of the change holder to a carrier jacket, it can be provided that the tool carrier has a body part contact surface in association with each change holder body part, and each change holder body part has a tool carrier contact surface for contact with the associated body part contact surface of the tool carrier, the body part contact surfaces being arranged on opposite sides of the tool carrier such that a mutual distance between the body part contact surfaces of the tool carrier increases starting from a carrier shell contact side of the tool carrier. The body part contact surfaces can be arranged essentially symmetrically with respect to a tool carrier center plane of the tool carrier.

Thus, the design of the tool carrier generates a wedge effect that prestresses a respective tool holder body part in the direction of the carrier jacket and in contact with it when a respective tool holder body part is fixed to the tool carrier by one or more fastening elements.

This effect can be further intensified by the fact that the tool carrier contact surfaces of the two tool holder body parts are arranged in such a complementary way to the associated body part contact surfaces of the tool carrier that when the tool holder body parts are fixed to the tool carrier, the mutual distance between the tool carrier contact surfaces of the two change tool holder Body parts in the direction of the carrier shell system side of the tool carrier increases away.

To connect an interchangeable tool to an interchangeable holder, the interchangeable tool holder can have an interchangeable tool receiving opening for receiving a tool shank of the interchangeable tool to be fixed on the interchangeable tool holder, extending in the direction of a longitudinal axis of the shank of an interchangeable tool body.

In particular when using identical parts for the two tool holder body parts, each tool holder body part can have a tool holder recess providing a part of the tool holder opening.

In order to achieve a form fit between a change tool and the change holder receiving it, it is proposed that the tool shank have an engagement recess that preferably runs completely around the longitudinal axis of the shank, and that each change holder body part in the area of the change tool receiving recess has an engagement projection that is to be positioned and engages in the engagement recess. The engagement projections of the two toolholder body parts can together form a substantially ring-like engagement area when the toolholder is fixed to the tool carrier.

The engagement recess can be delimited in the direction away from the interchangeable tool body by an engagement recess face, the engagement recess face being angled with respect to the longitudinal axis of the shank such that a distance between the engagement recess face and the interchangeable tool body increases, starting from a recess base. As a result, a wedge effect is achieved, which biases a change tool in the direction of the change holder and thus in contact with it.

This effect can be further supported by the fact that the engagement projection on each toolholder body part is delimited by an engagement projection face, with the change tool fixed to the change holder the engagement projection face being oriented in the direction away from the changeable tool body and being angled with respect to the longitudinal axis of the shank in such a way that a distance of the engaging projection face toward the change tool body decreases toward a projection crest of the engaging projection.

In order to transfer forces occurring during soil tillage operation and acting on an interchangeable tool to the associated interchangeable tool holder, an interchangeable tool support surface surrounding the interchangeable tool receiving opening can be provided on the interchangeable tool holder.

If identical parts are used for the two toolholder body parts, a partial surface of the tool support surface can be provided on each toolholder body part.

In an alternative configuration, in which an interchangeable tool can be fixed to the interchangeable tool holder in a simple manner, yet in a stable manner, the interchangeable tool receiving opening can be formed entirely in one of the body parts of the interchangeable tool holder.

It is proposed to define a changing tool on one of the tool holder body parts that in a receiving opening bottom of the changing tool receiving opening a passage opening for a den Tool shank is provided with respect to the change tool attachment member that defines a change holder body part.

In order to stably support an interchangeable tool on the interchangeable tool holder, an interchangeable tool support surface surrounding the interchangeable tool receiving opening can be provided on one interchangeable tool holder body part. Furthermore, in order to provide a substantially step-free outer peripheral contour in the transition between the two change tool holder body parts, a change tool holder body part receiving cutout receiving the other change tool holder body part can be provided in the one change tool holder body part.

A backlash-free and stable contact interaction can be achieved with this structure in that when the change holder is fixed to the tool carrier and the change tool is fixed to the change holder, the change tool is prestressed with a support area in contact with the change holder. In particular, the interchangeable tool can be pretensioned by the engagement projections engaging in the engagement recess with its support area in contact with the interchangeable holder.

On the tool body, the support area can comprise a ring-like tool holder support surface which at least partially surrounds the tool shank.

In another configuration of an interchangeable tool, the support area on the interchangeable tool body can have a plurality of interchangeable holder support sections arranged at a radial distance from the longitudinal axis of the shank and at a circumferential distance from one another around the longitudinal axis of the shank. In association with each change holder support section, a change tool support section can be provided on the change holder.

The present invention further relates to a soil tillage roller, comprising a roller shell providing a carrier shell and surrounding a roller axis of rotation, and a plurality of roller shells constructed according to the invention Roll tools, wherein the tool carrier is preferably fixed by each of the roll tools to the roll shell by material connection.

In order to achieve a stable connection to a soil tillage roller, when the change holder is fixed to a tool carrier, the change holder can be prestressed radially inwards against the tool carrier and/or the roller jacket. If the change holder is prestressed radially inwards only against the tool carrier, there is essentially no direct contact between the change holder and an outer peripheral side of the roll shell. If the change holder is prestressed radially inward only against the roll shell, the change holder is essentially not prestressed radially inward against the tool carrier, but is supported radially outward on the tool carrier to generate the prestress against the roll shell.

Furthermore, the present invention relates to a casing for a soil tillage roller, comprising a plurality of casing segments that provide a carrier casing and surround a roller casing of a soil tillage roller and surround a roller axis of rotation, and a plurality of roller tools constructed according to the invention, wherein the tool carrier of each of the roller tools is attached to one of the casing segments, preferably by a material connection is fixed.

With such a configuration, it can also be provided that when the change holder is fixed to a tool carrier, the change holder is prestressed radially inwards against the tool carrier and/or the roll shell.

Fig. 1

eine perspektivische Ansicht einer Bodenbearbeitungswalze mit einer Mehrzahl von am Außenumfang derselben vorgesehenen Walzenwerkzeugen;

Fig. 2

die Bodenbearbeitungswalze der Fig. 1 mit am Außenumfang derselben festgelegten Werkzeugträgern der Walzenwerkzeuge;

Fig. 3

eine perspektivische Explosionsdarstellung eines Walzenwerkzeugs;

Fig. 4

das Walzenwerkzeug der Fig. 3 im Zusammenbau;

Fig. 5

eine perspektivische Ansicht eines Werkzeugträgers des Walzenwerkzeugs der Fig. 3 und 4;

Fig. 6

eine perspektivische Ansicht von einem der beiden Wechselhalter-Körperteile des Walzenwerkzeugs der Fig. 3 und 4;

Fig. 7

eine perspektivische Ansicht des anderen der beiden Wechselhalter-Körperteile des Walzenwerkzeugs der Fig. 3 und 4;

Fig. 8

eine Seitenansicht des Walzenwerkzeugs der Fig. 3 und 4, betrachtet in Richtung einer Walzendrehachse einer das Walzenwerkzeug tragenden Bodenbearbeitungswalze;

Fig. 9

in ihrer Darstellung a) eine Querschnittansicht des in Fig. 8 dargestellten Walzenwerkzeugs, geschnitten längs einer Linie IXa-IXa in Fig. 8, und in ihrer Darstellung b) eine Querschnittansicht des Walzenwerkzeugs der Fig. 8, geschnitten längs einer Linie IXb-IXb in Fig. 8;

Fig. 10

eine Längsschnittansicht des Walzenwerkzeugs der Fig. 8, geschnitten längs einer Linie X-X in Fig. 9b);

Fig. 11

eine perspektivische Ansicht eines als Meißel ausgebildeten Wechselwerkzeugs;

Fig. 12

eine Seitenansicht eines als Stampffuß ausgebildeten Wechselwerkzeugs;

Fig. 13

eine perspektivische Ansicht alternativen Ausgestaltungsart eines Walzenwerkzeugs;

Fig. 14

eine Draufsicht auf das Walzenwerkzeug der Fig. 13;

Fig. 15

eine perspektivische Explosionsdarstellung des Walzenwerkzeugs der Fig. 13;

Fig. 16

eine Seitenansicht des Walzenwerkzeugs der Fig. 13;

Fig. 17

eine Schnittdarstellung des Walzenwerkzeugs der Fig. 13, geschnitten längs einer Linie XVII-XVII in Fig. 16;

Fig. 18

eine Schnittdarstellung des Walzenwerkzeugs der Fig. 13, geschnitten längs einer Linie XVIII-XVIII in Fig. 16;

Fig. 19

eine Seitenansicht einer weiteren alternativen Ausgestaltungsart eines Walzenwerkzeugs;

Fig. 20

eine Schnittdarstellung des Walzenwerkzeugs der Fig. 19, geschnitten längs einer Linie XX-XX in Fig. 19;

Fig. 21

eine Schnittdarstellung des Walzenwerkzeugs der Fig. 19, geschnitten längs einer Linie XXI-XXI in Fig. 19;

Fig. 22

eine perspektivische Explosionsdarstellung des Walzenwerkzeugs der Fig. 19;

Fig. 23

eine Draufsicht auf das Walzenwerkzeug der Fig. 19 mit einem als Stampffuß ausgebildeten Wechselwerkzeug;

Fig. 24

eine Seitenansicht des Walzenwerkzeugs der Fig. 23;

Fig. 25

eine Schnittdarstellung des Walzenwerkzeugs der Fig. 23, geschnitten längs einer Linie XXV-XXV in Fig. 24;

Fig. 26

eine perspektivische Ansicht einer weiteren alternativen Ausgestaltungsart eines Walzenwerkzeugs;

Fig. 27

eine perspektivische Explosionsdarstellung des Walzenwerkzeugs der Fig. 26;

Fig. 28

eine Seitenansicht des Walzenwerkzeugs der Fig. 26;

Fig. 29

eine Schnittdarstellung des Walzenwerkzeugs der Fig. 26, geschnitten längs einer Linie XXIX-XXIX in Fig. 28;

Fig. 30

eine Schnittdarstellung des Walzenwerkzeugs der Fig. 26, geschnitten längs einer Linie XXX-XXX in Fig. 28;

Fig. 31

eine Seitenansicht einer als Bodenverdichter ausgebildeten Bodenbearbeitungsmaschine mit einer Bodenbearbeitungswalze.

The invention is described in detail below with reference to the attached figures. It shows:

1

a perspective view of a soil tillage roller with a plurality of roller tools provided on the outer circumference thereof;

2

the tillage roller 1 with tool carriers of the roller tools fixed on the outer circumference thereof;

3

an exploded perspective view of a roller tool;

4

the roller tool 3 in assembly;

figure 5

a perspective view of a tool carrier of the roller tool Figures 3 and 4 ;

6

a perspective view of one of the two change holder body parts of the roll tool Figures 3 and 4 ;

7

a perspective view of the other of the two change holder body parts of the roll tool Figures 3 and 4 ;

8

a side view of the roll tool of FIG Figures 3 and 4 , viewed in the direction of a roller axis of rotation of a soil tillage roller carrying the roller tool;

9

in their representation a) a cross-sectional view of the in 8 roller tool shown, sectioned along a line IXa-IXa in 8 , and in their representation b) a cross-sectional view of the roll tool of 8 , sectioned along a line IXb-IXb in 8 ;

10

a longitudinal sectional view of the roll tool of FIG 8 , cut along a line XX in Figure 9b );

11

a perspective view of a changing tool designed as a chisel;

12

a side view of a changing tool designed as a tamping foot;

13

a perspective view of an alternative embodiment of a roller tool;

14

a plan view of the roller tool 13 ;

15

an exploded perspective view of the roller tool 13 ;

16

a side view of the roll tool of FIG 13 ;

17

a sectional view of the roller tool 13 , cut along a line XVII-XVII in 16 ;

18

a sectional view of the roller tool 13 , cut along a line XVIII-XVIII in 16 ;

19

a side view of another alternative embodiment of a roller tool;

20

a sectional view of the roller tool 19 , cut along a line XX-XX in 19 ;

21

a sectional view of the roller tool 19 , cut along a line XXI-XXI in 19 ;

22

an exploded perspective view of the roller tool 19 ;

23

a plan view of the roller tool 19 with a changing tool designed as a pad foot;

24

a side view of the roll tool of FIG 23 ;

25

a sectional view of the roller tool 23 , cut along a line XXV-XXV in 24 ;

26

a perspective view of another alternative embodiment of a roller tool;

27

an exploded perspective view of the roller tool 26 ;

28

a side view of the roll tool of FIG 26 ;

29

a sectional view of the roller tool 26 , cut along a line XXIX-XXIX in 28 ;

30

a sectional view of the roller tool 26 , cut along a line XXX-XXX in 28 ;

31

a side view of a soil cultivating machine designed as a soil compactor with a soil cultivating roller.

Before in the following with reference to the Figures 1 to 30 the structure of roller tools to be provided on a tillage roller is described in detail with reference to FIG 31 the structure of a soil cultivating machine 10 is described, on which such roller tools can be used.

The soil tillage machine 10, which is basically constructed as a soil compactor, comprises an operator's station 14 on a rear carriage 12 and wheels 16 driven by a drive unit provided on the rear carriage 12 character level of 31 orthogonal roll axis of rotation rotatably supported. Inside the tillage roller 20, a Vibration excitation arrangement may be provided in order to produce on the soil tillage roller 20 a vibration acceleration which is essentially orthogonal to the roller axis of rotation or an oscillation acceleration which is essentially tangential to the roller axis of rotation. The soil tillage roller 20 moves over the subsoil to be worked U with a roll shell 22 surrounding the roll axis of rotation.

The roller tools described in detail below can be attached directly to the outer circumference of the soil cultivation roller 20 or the roller shell 22, so that in this case the roller shell 22 provides a carrier shell 26 which carries the roller tools. At an in 31 In the configuration indicated by the dashed line, the soil tillage roller 20 can be surrounded by a casing 30 made up of a plurality of casing segments 28, on which the roller tools described in detail below can then be provided, so that the casing 30 or those arranged one after the other in the circumferential direction and fixed to one another connected casing segments 28 provide the carrier jacket 26 in this embodiment.

the 1 shows such a soil tillage roller 20 on whose roller shell 22 providing the carrier shell 26 a plurality of roller tools 32 are provided. The roller tools 32 are arranged on an outer peripheral side 24 of the roller shell 22 or carrier shell 26 in rings surrounding a roller axis of rotation W, with the roller tools 32 being offset from one another in the circumferential direction in rings that are directly adjacent to one another in the direction of the roller axis of rotation W.

the Figures 3 and 4 show the basic structure of such a roller tool 32. Each roller tool 32 comprises a change holder 34 with two mutually preferably essentially identical change holder body parts 36, 38. In its basic structure, the change holder 32 corresponds to that from the WO 2013/107545 A2 known structure of a change holder and has a trapezoidal profile in a side view, ie when viewed in the direction of the roll axis of rotation W. Each of the two change holder body parts 36, 38 provides a carrier jacket contact surface 40 adapted to the circular outer peripheral contour of the roller jacket 22 providing the carrier jacket 26, with which the respective change holder body part 36, 38 rests in the assembled state on the outer peripheral side 24 of the carrier jacket 26 and , as described below, is held thereon under pretension.

The roller tool 32 also includes a tool carrier 46 which, as in 2 shown, for example by welding, but possibly also screwing, the outer peripheral side 24 of the roller shell 22 or carrier shell 26 is fixed and thus the position for a respective roller tool 32 on the soil tillage roller 20 specifies.

Each of the two tool holder body parts 36, 38 provides a tool carrier receiving recess 48 ready. When assembled, the tool carrier receiving recesses 48 provide a tool carrier receiving space 50 in which the associated tool carrier 46 is received. The tool carrier 46 is thus completely shielded from the outside by the two tool holder body parts 36, 38 and protected from external influences.

In each tool holder body part 36, 38 there are two fastening member access openings 54, through which fastening members 58 in the form of screw bolts can be passed and screwed into internally threaded openings 56 in the tool carrier 46. For receiving fastener heads 60, the fastener reach-through openings 54 are formed with expanded fastener head receiving areas 62. in the in 4 Recognizable assembly state are thus the fasteners 58 completely inside the tool holder body parts 36, 38, so that the fasteners 58 and in particular the fastener heads 60 are protected against damage or wear and thus also after a long time Working operation can be easily solved by using an appropriate tool.

The change holder 34 provides a change tool receiving opening 64 in a central area. When the change holder 34 is configured with two change holder body parts 36, 38 of substantially identical construction, a change tool receiving recess 66 is provided in each of the change holder body parts 36, 38. The changing tool receiving opening formed by the two changing tool receiving recesses 66 has an essentially cylindrical structure in which a tool shank 68 of a changing tool 70 embodied as a chisel, for example, can be received. In the area in which the two tool holder body parts 36, 38 form the tool holder opening 64, the tool carrier 46 has a recess 73, into which the part of the tool holder 34 or the tool holder body parts 36 that provides the tool holder opening 64 , 38 can be engagedly positioned.

This in 11 The changing tool 70 illustrated and designed in the form of a chisel has a changing tool body 72 and the tool shank 68 extending from it in the direction of a longitudinal axis S of the shank. In the tool shank 68 there is an engagement recess 76 which preferably completely surrounds the longitudinal axis S of the shank, which has an essentially trapezoidal structure and is therefore designed to taper radially inwards towards a recess bottom 78 . In particular, the engagement recess 76 thus provides an engagement recess face 80 oriented toward the interchangeable tool body 72, which, as indicated by an auxiliary line H ₁ in 10 indicated, is inclined at an angle different from 90° with respect to the longitudinal axis S of the shank and has an increasing distance from the interchangeable tool body 72 from radially inwards, that is to say away from the recess base 78 radially outwards.

On the two change holder body parts 36, 38 in association with the engagement recess 76 each engagement projections 82 are formed. the In the assembled state, engagement projections 82 of the two tool holder body parts 36, 38 form a substantially ring-like engagement region 84, which engages in the engagement recess 76 of an interchangeable tool 70 that is detachably fixed on the tool holder 34.

Each of the two engagement projections 82 of the toolholder body parts 36, 38 has a trapezoidal structure to match the trapezoidal structure of the engagement recess 76 and is delimited on its side facing away from the interchangeable tool body 72 in the assembled state by an engagement projection face 86 which, as in 10 likewise indicated by the auxiliary line H ₁ , is angled at an angle different from 90° with respect to the longitudinal axis S of the shank, in particular is angled at the same angle as the engagement recess end face 80. The engagement projections 82 are thus designed to taper in the direction of a projection apex 83.

The two engagement projections 82 of the toolholder body parts 36, 38 are dimensioned shorter in the direction of the longitudinal axis S of the shank than the engagement recess 76, so that during assembly or in the assembled state only the engagement recess face 80 interacts with the engagement projection faces 86, in the other axial end region the However, engagement projections 82 do not come into contact with the tool shank 68 . In this way, during assembly or in the assembled state, a wedge-like interaction between the engagement projection end faces 86 of the two change holder body parts 36, 38 and the engagement recess end face 80 can be generated to bias the changing tool 70 in the direction of the change holder 34 . As a result, the interchangeable tool 70 with a support region 88 formed on the interchangeable tool body 72, which when the interchangeable tool 70 is configured as a chisel is provided by an interchangeable tool holder support surface 90 surrounding the tool shank 68 in the manner of a ring, rests against an interchangeable tool receiving opening 64 in the interchangeable tool holder 34 surrounding changing tool support surface 92 pressed. The changing tool support surface 92 comprises a partial surface 93 on each of the changing holder body parts 36, 38.

In the configuration of a roller tool 32 according to the invention, the engagement projection 82 could also be provided on the tool shank 68 with a ring-like engagement projection end face 86 provided thereon and substantially completely surrounding the shank longitudinal axis S, while sections of the engagement recess 76 and the engagement recess face 80 could be formed.

The tool carrier 46 rests with a carrier shell contact side 94 on the outer peripheral side 24 of the carrier shell 26 or, in the exemplary embodiment shown, of the roller shell 22 . In the Figures 9 and 10 It can be seen that a chamfer 96 provided for receiving a weld seam is formed on the outer peripheral region of the carrier jacket contact side 94 .

The tool carrier 46 provides body part contact surfaces 98 on two sides facing away from one another, which are oriented in the direction of the roller axis of rotation W when it is attached to the carrier jacket 26 . Starting from their areas adjoining the carrier jacket contact side 94 or chamfer 96, these are inclined radially outward away from one another and thus extend in the radial direction along an in Figure 9b ) shown at an angle to the longitudinal axis S of the shank. The _two body part contact surfaces 98 of the tool carrier 96 are preferably arranged symmetrically or mirror-symmetrically with respect to a central plane of the tool carrier 46 containing the longitudinal axis S of the shank, so that the tool carrier 46 moves radially outward, i.e. in the direction has a wedge-like or trapezoidal cross-sectional geometry that widens away from the carrier jacket contact surface 94 .

Corresponding to this positioning of the body part contact surfaces 98, which is angled with respect to the longitudinal axis of the shank or the central plane of the tool carrier, each tool holder body part 36, 38 has a complementary angled tool carrier contact surface 100 on. The interaction of the body part contact surfaces 98 with the respectively assigned tool carrier contact surfaces 100 achieves a wedge effect, through which the tool holder body parts 36, 38 are prestressed in the direction of the carrier casing 26, so that they are stable with their carrier casing contact surfaces 40 abut against the outside of the carrier casing 26 when the two change holder body parts 36, 38 are loaded in the direction of the tool carrier 46 by tightening the fastening elements 58.

When assembling a roller tool 32 described above, the two tool holder body parts 36 , 38 are first moved laterally toward the tool carrier 46 fixed to the carrier casing 26 . When the tool holder body parts 36, 38 approach the tool holder 46 and each other in this way, the tool shank 68 of the tool changer 70 can also be accommodated in the tool holder recesses 66, with the engagement projections 82 engaging in the engagement recess 76. The engagement projection end faces 86 come into contact with the engagement recess end face 80 and, as the change holder body parts 36, 38 increasingly approach each other, load the change tool 70 in the direction of the change holder 34 until the change holder support surface 90 comes into contact with the change tool support surface 92 is coming. In the course of this mutual approach of the two tool holder body parts 36, 38, which is also caused or supported by the screwing of the fastening elements 58 into the associated internally threaded openings 56 of the tool carrier 46, the tool carrier contact surfaces provided on the tool body parts 36, 38 come into contact 100 in contact with the associated body part contact surfaces 98, as a result of which the entire interchangeable holder 34 is prestressed radially inwards, ie towards the outer peripheral side 24 of the carrier jacket 26. In the assembled state, the change holder 34 rests with the carrier jacket contact surfaces 40 of the change holder body parts 36, 38 in a stable and play-free manner on the outer peripheral side 24 of the carrier jacket 26. At the same time, the changing tool 70 is stably prestressed against the changing tool support surface 92 of the changing tool holder 34 and is held on the changing tool holder 34 . In this In the assembled state, breaking projections 102, 104 are then formed on quick-change holder 34 when positioned on a carrier jacket 26 in the circumferential direction on both sides of changing tool 70, which on the one hand support the breaking of the subsurface U to be processed and on the other hand protect quick-change holder 34 from excessive wear.

To change a change tool 70 or to replace worn change tool holder body parts 36, 38, the fastening elements 58, which are fundamentally protected against external influences, can be loosened and thus the change tool holder body parts 36, 38 held detachably on the tool carrier 46 by the fastening elements 58 can be removed from the tool carrier 46 be, with the changing tool 70 is released. It can then be replaced that of the detached from the tool holder 46 components, which is to be replaced due to wear or to carry out another work operation.

the 12 shows an alternative embodiment of a changing tool 70'. With its interchangeable tool body 72, this forms a tamping foot which can be used in particular for compacting soil. The interchangeable tool body 72 is shaped in such a way that it rests against the outer contour of the interchangeable holder 34 in the assembled state. In particular, the interchangeable tool body 72 has interchangeable tool support sections 106 in the four corner regions of the same interchangeable tool holder support sections 106, which in the assembled state are pressed against complementary interchangeable tool support sections 108 of the interchangeable tool holder body parts 36, 38 by the previously described interaction of the engagement recess 76 of the tool shank 68 with the engagement projections 82 and thus ensure stable and backlash-free support of the interchangeable tool body 72 on the interchangeable holder 34 .

Another alternative embodiment of a roll tool is in the Figures 13 to 18 shown. In this embodiment, the structure of the roller tool 32 essentially corresponds to the structure described above. This roller tool 32 also has the one on the outer peripheral side 24 Roller shell 22 fixed by a preferably completely circumferential weld seam 46 and a tool holder 34 constructed with two identically constructed tool holder body parts 36, 38. In this configuration, it is preferably ensured that only the tool carrier 46 touches the roll shell 22, while the two tool holder body parts 36, 38 and also the change tool 70 to be held by them essentially have no direct contact with the roll shell 22. However, the tool holder body parts 36, 38 cover the weld seam fixing the tool carrier 46 to the roll shell 22 and thus protect it against wear. In this embodiment, too, the tool carrier 46 has a chamfer 47 in its peripheral region adjoining the outer peripheral side 24 of the roll shell 22, which ensures increased strength of the weld.

Unlike the example in 3 recognizable embodiment are in the changing tool 32 of the embodiment of Figures 13 to 18 the two tool holder body parts 36, 38 are fixed to the tool carrier 46 only by two fastening elements 58 designed as screw bolts. Each of the quick-change holder body parts 36, 38 has, in association with one of the two fasteners 58, a fastener reach-through opening 54 with a fastener head receiving area 62. Furthermore, each of the change holder body parts 36, 38 has an internally threaded opening 56 into which a fastening element 58 passed through a fastening element penetration opening 54 of the respective other change holder body part 36, 38 can be screwed. For locking with respect to the tool carrier 46, the latter has, in association with a respective pair of a fastening element passage opening 54 and an internally threaded opening 56, a passage opening 110 through which a fastening element 58 passed through a fastening element passage opening 54 and screwed into an internally threaded opening 56 extends.

Due to the mutually identical design of the two tool holder body parts 36, 38, the two fastening elements 58 inserted from opposite sides of the interchangeable tool holder 34 into the respective associated fastening element passage opening 54 and screwed through the passage opening 110 into the internally threaded opening 56 of the respective other interchangeable tool holder body part 36, 38.

Another alternative embodiment of a roll tool is in the Figures 19 to 22 shown. While in this embodiment the structure and connection of the tool carrier 46 to the roll shell 22 essentially corresponds to the embodiments described above, the two tool holder body parts 36, 38 of the tool holder 34 are not identical to one another. The interchangeable tool receiving opening 64 is formed entirely in the interchangeable tool holder body part 38, for which purpose it has a lateral bulge 112 which is accommodated in a corresponding recess 114 in the other interchangeable tool holder body part 36 when the two interchangeable tool holder body parts 36, 38 are fixed to the tool carrier 46 are.

To secure the changing tool 70 on the changing tool holder 34 or on the changing tool holder body part 38 that has the changing tool receiving opening 64, a receiving opening bottom 116 is provided on the latter, which delimits the changing tool receiving opening 64 in the direction of the roller shell 22 or the tool carrier 46, in which a Access opening 118 is formed. A fastening member 120 embodied as a screw bolt can be screwed through the reach-through opening 118 in the base 116 of the receiving opening into an internally threaded opening 122 in the tool shank 68 of the changing tool 70 , as a result of which the changing tool 70 is fixed to the changing holder body part 38 . One recognizes in 20 that in this type of configuration both the tool shank 68 and the interchangeable tool receiving opening 64 receiving it are essentially cylindrical, i.e. unstructured without projections and recesses, in order to be able to insert the tool shank 68 in the direction of its longitudinal axis into the interchangeable tool receiving opening 64.

Before the two tool holder body parts 36, 38 are attached to the tool carrier 46, the tool changer 70 is fixed to the tool holder body part 38 in the manner described above. These are then positioned on both sides of the tool carrier 46, with a recess 126 being provided in the tool carrier 46 in association with a downwardly protruding head 124 of the fastening element 122, in which the head 124 engages when the tool holder body part 38 is positioned on the tool carrier 46. Thus, the head 124 of the fastening member 122 is shielded from the outside during operation and protected from wear and tear and damage.

After positioning the tool holder body parts 36, 38 on the tool carrier 46, they are fixed to one another and to the tool carrier 46 by two fastening elements 58 designed as screw bolts. For this purpose, the change holder body part 38 , which also provides the change tool receiving opening 64 , has a fastening element reach-through opening 54 in association with each fastening element 58 . The tool carrier 46 has a passage opening 110 associated with each fastening element 58, and an internally threaded opening 56 is formed in the change holder body part 36 in association with each fastening element 58, into which this can be screwed. In this embodiment, too, the two quick-change holder body parts 36, 38 are fixed to one another and to the tool carrier 46 by only two fastening elements 58, in which case, unlike in the embodiment of FIG Figures 13 to 18 , the two internally threaded openings 56 on the one hand and the two fastening element reach-through openings 54 on the other hand are each positioned in the same change holder body part 36 and 38, respectively.

At the in the Figures 19 to 22 In the illustrated embodiment of a roller tool 32, due to the fact that the changing tool receiving opening 64 is formed completely in the changing tool holder body part 38, the changing tool support surface 92 is also provided completely and thus without a circumferential interruption on the changing tool holder body part 38. Due to the fact that, as in 20 recognizable, the tool shank 68 is designed somewhat shorter than the changing tool receiving opening 64 that accommodates it, the changing tool 70 can be clamped with respect to the change holder body part 38 by the fastening element 120 in such a way that the changing tool 70 is clamped firmly with its change holder support surface 90 against the change tool support surface 92 .

Also with the in the Figures 19 to 22 In the illustrated embodiment of a roller tool 32, the two tool holder body parts 36, 38, which are designed differently from one another, are stably carried on the tool carrier 46 in the manner described above with reference to the various other embodiments and completely cover the weld seam that fixes this to the roller shell 22, so that these is protected against wear, without a direct supporting contact between the change holder body parts 36, 38 and the outer peripheral side 24 of the roll shell. Due to the interaction of the tool holder body parts 36, 38 or the tool carrier contact surfaces 100 formed thereon with the body part contact surfaces 98 of the tool carrier 46, the tool holder body parts 36, 38 are moved in the direction of the tool carrier 46 or the roll shell 22 and with respect to them of the roll axis of rotation radially inwards, whereby the firm bond between the tool holder body parts 36, 38 and the tool carrier 46 is reinforced. As explained above, prestressing against the outer peripheral side 24 of the roll shell 22 can also be implemented, so that the tool holder body parts 36, 38 rest with their areas surrounding the tool carrier 46 on the outer peripheral side 24 of the roll shell 22 or are supported radially inwards are. Alternatively, in this and also all the previously described embodiments, the quick-change holder body parts 36, 38 can be prestressed radially inward against the tool carrier 46 and can be supported radially inward essentially on the plate-like area of the tool carrier 46 fixed to the roll shell 22 and also the the weld seam defining the tool carrier 46 on the roll shell 22, while the tool holder body parts 36, 38 themselves do not come into direct contact with the roll shell 22. There is a gap-like space between the change holder body parts 36, 38 and the outer peripheral side 24 of the roll shell 22. The positioning of the change holder 34 is independent changes in the structure of the roll shell 22 on its outer peripheral side 24 caused, for example, by wear.

the Figures 23 to 25 show that a changing tool 70′ designed as a pad foot can also be used in this configuration of a changing tool holder with changing tool body parts that are not constructed identically to one another. This can, as above with reference to the 12 also described, for example, in lateral areas or in corner areas, change tool holder support sections which abut complementary change tool support sections of the change tool holder body parts 36, 38. In order to simplify the assembly, it could also be provided that, similar to the embodiment described above with a changing tool 70 designed as a chisel, such a change holder support section 106 is designed as a surface on the changing tool body 72 running around the tool shank 68. A complementary change tool support section 108 is then provided on the change tool holder body part 38 by an annular surface surrounding the change tool receiving opening 64 .

the Figures 26 to 30 show a modification of the Figures 19 to 25 shown embodiment of a roller tool 32. Also in the in the Figures 26 to 30 In the illustrated embodiment of a roller tool 32, the two tool holder body parts 36, 38 are designed in such a way that the tool holder opening 64 is formed completely in the tool holder body part 38. The change holder body part 36, which, as well as in the embodiment of Figures 19 to 25 , serves to provide the internally threaded openings 56 for screwing in the fasteners 58 to be guided through the fastener passage openings 54 of the tool holder body part 38 and the passage openings 110 of the tool carrier 46, is in the embodiment of Figures 26 to 30 However, significantly smaller dimensions than in the embodiment of Figures 22 to 25 .

In association with the change tool holder body part 36, the change tool holder body part 38 has a change tool holder body part receiving recess 128 on one side on, which is open in the lateral direction and in the direction of the roll shell 22 away. In the assembled state, the interchangeable tool body part 36 is essentially completely accommodated in the interchangeable tool body part receiving recess 128, so that in the transition to the other interchangeable tool body part 38 essentially no steps are formed, but rather the outer surfaces of these two interchangeable tool body parts 36, 38 approximately merge smoothly into one another.

When assembling such in the Figures 26 to 30 illustrated roll tool 32, as previously with reference to FIG Figures 19 to 25 described, first the changing tool 70 or 70 ′ with its tool shank 68 is inserted into the changing tool receiving opening 64 of the changing holder body part 38 and fixed therein by the fastening element 120 . Subsequently, the change holder body part 38 is placed radially on the outside onto the associated tool carrier 46 and the fastening elements 58 are guided through the fastening element reach-through openings 54 and the reach-through openings 110 and into the change holder to be positioned in the change holder body part receiving recess 128 Body part 36 screwed.

With the construction of a roller tool according to the invention, in which only one respective tool carrier is permanently fixed to a carrier casing, for example by welding, the possibility is created in a simple manner of replacing both the change holder and the roller tool held on a respective change holder, if necessary. Since both the fasteners fixing the tool holder to the tool carrier are protected against excessive wear and the tool holder itself is protected by the tool holder against wear from external influences, the tool holder and with it the change tool that is detachably held on it can also be used after a long period of operation and the resulting stronger Wear can be easily replaced without having to act on the change holder, for example by welding tools or the like.

Claims (25)

Roller tool for a soil tillage roller of a soil tillage machine, comprising a tool carrier (46) to be fixed on an outer peripheral side of a carrier casing (26) of a soil tillage roller (20), a change holder (34) to be detachably fixed to the tool carrier (46) and a change holder (34) detachable changing tool (70; 70') to be defined. Roller tool according to claim 1,
characterized in that the change holder (34) comprises two change holder body parts (36, 38), with the change holder (34) fixed to the tool carrier (46), the two change holder body parts (36, 38) receiving the tool carrier (46). Form tool carrier receiving space (50) and are fixed by fastening elements (58) on the tool carrier (46). Roller tool according to claim 2,
characterized in that the two tool holder body parts (36, 38) are constructed essentially identically to one another and/and that each tool holder body part (36, 38) has a tool carrier receiving recess (48 ) or/and that each change holder body part (36, 38) has a carrier jacket contact surface (40) to be positioned facing an outer peripheral side (24) of a carrier jacket (26) and adapted to an outer peripheral contour of the carrier jacket (26). Roller tool according to claim 2 or 3,
characterized in that each change holder body part (36, 38) can be fixed to the tool carrier (46) by at least one fastening element (58), preferably two fastening elements (58), each change holder body part (36, 38) being assigned to one for each fastening element (58) which is fixed to the tool carrier (46). fastener reach-through opening (54) with an enlarged fastener head receiving area (62). Roller tool according to one of claims 2-4,
characterized in that the tool carrier (46) has a body part contact surface (98) in association with each change holder body part (36, 38) and each change holder body part (36, 38) has a tool carrier contact surface (100) for contact with the associated body part contact surface (98) of the tool carrier (46), the body part contact surfaces (98) being arranged on opposite sides of the tool carrier (46) in such a way that a mutual spacing of the body part contact surfaces (46) of the tool carrier, starting from a carrier casing contact side (94) of the tool carrier (46), preferably wherein the body part contact surfaces (98) are arranged essentially symmetrically with respect to a tool carrier center plane of the tool carrier (46). Roller tool according to claim 5,
characterized in that the tool carrier contact surfaces (100) of the two tool holder body parts (36, 38) are arranged to complement the associated body part contact surfaces (98) of the tool carrier (46) in such a way that when the tool holder (46) is fixed Body parts (36, 38) the mutual distance between the tool carrier contact surfaces (100) of the two tool holder body parts (36, 38) increases in the direction of the carrier jacket contact side (94) of the tool carrier (46) away. Roller tool according to one of the preceding claims,
characterized in that the change holder (34) has a change tool receiving opening (64) for receiving a tool shank (68) of the change tool (70) to be fixed on the change holder (34) extending in the direction of a shank longitudinal axis (S) from a change tool body (72); 70'). Roller tool according to claim 2 and claim 7,
characterized in that each change holder body part (36, 38) has a change tool receiving recess (66) providing a part of the change tool receiving opening (64). Roller tool according to claim 8,
characterized in that the tool shank (68) has an engagement recess (76) that preferably runs all the way around the longitudinal axis (S) of the shank, and in that each change holder body part (36, 38) in the region of the change tool receiving recess (66) has an engagement recess ( 76) has an engagement projection (82) to be positioned in an engaging manner, preferably wherein the engagement projections (82) of the two toolholder body parts (36, 38) together form an essentially ring-like engagement area (84) when the toolholder (34) is fixed to the tool carrier (46). . Roller tool according to claim 9,
characterized in that the engagement recess (76) is delimited in the direction away from the interchangeable tool body (72) by an engagement recess end face (80), the engagement recess end face (80) being angled with respect to the longitudinal axis (S) of the shank in such a way that a distance between the engagement recess end face (80 ) to the changing tool body (72) starting from a recess floor (78) increases. Roller tool according to claim 10,
characterized in that the engagement projection (82) on each change holder body part (36, 38) is delimited by an engagement projection face (86), with the change tool (70; 70') fixed to the change holder (34) the engagement projection face (86) in Direction is oriented away from the interchangeable tool body (72) and is angled with respect to the longitudinal axis (S) of the shank in such a way that a distance between the engagement projection end face (86) and the interchangeable tool body (72) is in Direction to a projection apex (83) of the engagement projection (82) decreases. Roller tool according to claims 7-11,
characterized in that a change tool support surface (92) surrounding the change tool receiving opening (64) is provided on the change holder (34). Roller tool according to claim 12, if dependent on claim 2,
characterized in that a partial surface (93) of the changing tool support surface (92) is provided on each changing holder body part (36, 38). Roller tool according to claim 7,
characterized in that the change tool receiving opening (64) is formed entirely in one of the change tool holder body parts (36, 38). Roller tool according to claim 14,
characterized in that in a receiving opening bottom (116) of the changing tool receiving opening (64) there is a reach-through opening (118) for a changing tool fastening element (120) fixing the tool shank (68) with respect to the changing holder body part (38). Roller tool according to claim 14 or 15,
characterized in that on one change tool holder body part (38) there is a change tool support surface (92) surrounding the change tool receiving opening (64), and/or in that one change tool holder body part (38) contains the other change tool holder body part (36) receiving change holder body part receiving recess (128) is provided. Roller tool according to one of the preceding claims,
characterized in that when the tool holder (46) fixed change holder (34) and on the change holder (34) fixed Changing tool (70; 70 ') the changing tool (70; 70') is prestressed with a support area (88) in contact with the change holder (34). Roller tool according to claim 17, if dependent on claim 9,
characterized in that the changing tool (70; 70') is pretensioned by the engagement projections (82) engaging in the engagement recess (76) with its support area (88) in contact with the change holder (34). Roller tool according to claim 17 or 18, if dependent on claim 7,
characterized in that the support area (88) on the interchangeable tool body (72) comprises a ring-like interchangeable tool holder support surface (90) which at least partially surrounds the tool shank (68). Roller tool according to claim 17 or 18, if dependent on claim 7,
characterized in that the support area (88) on the interchangeable tool body (72) has a plurality of interchangeable holder support sections (106) arranged at a radial distance from the longitudinal axis (S) of the shank and at a circumferential distance from one another about the longitudinal shank axis (S). Roller tool according to claim 20,
characterized in that a change tool support section (108) is provided on the change holder (34) in association with each change holder support section (106). A soil tillage roller comprising a roller shell (22) providing a carrier shell (26) surrounding a roller axis of rotation and a plurality of roller tools (32) according to any one of the preceding claims, the tool carrier (46) of each of the roller tools (32) is preferably fixed to the roll shell (22) by material connection. Soil tillage roller according to Claim 22, characterized in that when the change holder (34) is fixed to a tool carrier (46), the change holder (34) is prestressed radially inwards against the tool carrier (46) and/or the roller jacket (22). Covering for a soil tillage roller, comprising a plurality of covering segments (28) to be arranged covering a soil tillage roller (20) providing a carrier shell (26) and surrounding a roll axis of rotation surrounding a roll shell (24) and a plurality of roller tools (32) according to one of Claims 1-21, wherein the tool carrier (46) of each of the roller tools (32) is fixed to one of the casing segments (28), preferably by a material connection. Cover according to Claim 24, characterized in that when the change holder (34) is fixed to a tool carrier (46), the change holder (34) is prestressed radially inwards against the tool carrier (46) and/or the carrier jacket (26).

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