ROLLER TOOL FOR A SOIL PROCESSING ROLLER

Abstract

A roller tool for a soil processing roller of a soil processing machine incudes a tool holder to be fixed on an outer peripheral side of a carrier casing. The tool holder has an attachment region for fixed attachment on an outer peripheral surface of the carrier casing and a tool holder opening elongated in the direction of an opening longitudinal axis for accommodating a replaceable tool shaft of a replaceable tool to be detachably fixed on the tool holder. The tool holder includes a first tool holder part, wherein the attachment region is provided completely on the first tool holder part, and a second tool holder part to be detachably attached to the first tool holder part. The second tool holder part, together with the first tool holder part, delimits the tool holder opening in the circumferential direction around the opening longitudinal axis.

Claims

1. A roller tool for a soil processing roller of a soil processing machine, comprising a replaceable tool holder configured to be fixed on an outer peripheral side of a carrier casing, wherein the replaceable tool holder has an attachment region for fixed attachment to an outer peripheral surface of the carrier casing and a replaceable tool holder opening elongated in the direction of an opening longitudinal axis for accommodating a replaceable tool shaft of a replaceable tool to be detachably fixed on the replaceable tool holder, wherein the replaceable tool holder comprises: a first replaceable tool holder part, wherein the attachment region is completely provided on the first replaceable tool holder part, a second replaceable tool holder part to be detachably attached to the first replaceable tool holder part, wherein the second replaceable tool holder part, together with the first replaceable tool holder part, delimits the replaceable tool holder opening in the circumferential direction around the opening longitudinal axis.

2. The roller tool as claimed in claim 1, wherein the first replaceable tool holder part delimits the replaceable tool holder opening in the circumferential direction around the opening longitudinal axis in a first peripheral region, the second replaceable tool holder part delimits the replaceable tool holder opening in the circumferential direction around the opening longitudinal axis in a second peripheral region, and the first peripheral region is larger than the second peripheral region.

3. The roller tool as claimed in claim 1, wherein a replaceable tool holding formation is provided on the replaceable tool holder.

4. The roller tool as claimed in claim 3, wherein the replaceable tool holding formation is provided only on the first replaceable tool holder part.

5. The roller tool as claimed in claim 2, wherein the replaceable tool holding formation is formed in the first peripheral region extending around the opening longitudinal axis.

6. The roller tool as claimed in claim 3, wherein the replaceable tool having the replaceable tool shaft to be accommodated in the replaceable tool holder opening includes a counter holding formation for engagement with the replaceable tool retaining formation is provided on the replaceable tool shaft.

7. The roller tool as claimed in claim 6, wherein the replaceable tool holding formation comprises a holding projection protruding radially inwards with respect to the opening longitudinal axis, and in that the counter holding formation comprises a holding recess set back radially inwards with respect to a shaft longitudinal axis of the replaceable tool.

8. The roller tool as claimed in claim 1, wherein a replaceable tool holder part receptacle recess for receiving the second replaceable tool holder part is formed on the first replaceable tool holder part.

9. The roller tool as claimed in claim 1, wherein the second replaceable tool holder part is to be fixed by a plurality of fasteners on the first replaceable tool holder part.

10. The roller tool as claimed in claim 9, wherein in at least one replaceable tool holder part of first replaceable tool holder part and second replaceable tool holder part, a fastener passage opening is provided in association with at least one fastener, and in the other replaceable tool holder part of the first replaceable tool holder part and second replaceable tool holder part, a fastener formfitting engagement opening is provided in association with each fastener passage opening of the one replaceable tool holder part.

11. The roller tool as claimed in claim 10, wherein in the first replaceable tool holder part, at least one fastener passage opening is respectively provided on both sides of the replaceable tool holder opening.

12. The roller tool as claimed in claim 1, wherein a replaceable tool support region facing away from the attachment region is provided on the replaceable tool holder.

13. The roller tool as claimed in claim 12, wherein the replaceable tool support region comprises a replaceable tool support surface that completely surrounds the replaceable tool holder opening, wherein a first replaceable tool support surface part is provided on the first replaceable tool holder part and a second replaceable tool support surface part is provided on the second replaceable tool holder part.

14. The roller tool as claimed in claim 12, wherein a replaceable tool holding formation is provided on the replaceable tool holder; the replaceable tool having the replaceable tool shaft to be accommodated in the replaceable tool holder opening including a counter holding formation for engagement with the replaceable tool retaining formation provided on the replaceable tool shaft; and wherein when the replaceable tool holding formation is engaged with the counter holding formation, and the replaceable tool is pre-tensioned in contact with the replaceable tool support region.

15. A soil processing roller comprising a plurality of roller tools as claimed in claim 1, wherein the first replaceable tool holder parts of the roller tools are firmly attached to a carrier casing by welding.

16. The soil processing roller as claimed in claim 15, wherein the carrier casing is a roller casing of the soil processing roller, or in that the carrier casing is a cladding casing to be arranged surrounding the roller casing of the soil processing roller.

17. A soil processing machine comprising at least one soil processing roller as claimed in claim 15.

18. A method for attaching a replaceable tool to a replaceable tool holder of a roller tool as claimed in claim 1: a) with the second replaceable tool holder part removed from the first replaceable tool holder part, inserting the replaceable tool shaft of the replaceable tool into a part of the replaceable tool holder opening formed in the first replaceable tool holder part, b) attaching the second replaceable tool holder part to the first replaceable tool holder part during or after inserting the replaceable tool shaft of the replaceable tool into the part of the replaceable tool holder opening formed in the first replaceable tool holder part.

19. The method as claimed in claim 18, wherein, the replaceable tool shaft is inserted into the part of the replaceable tool holder opening formed in the first replaceable tool holder part by moving it transversely to the opening longitudinal axis of the replaceable tool holder opening.

Description

[0030] The present invention is described in detail below with reference to the attached figures. In the figures:

[0031] FIG. 1 shows a perspective view of a soil processing roller having a plurality of first tool holder parts of tool holders carried on an outer peripheral surface of a roller casing;

[0032] FIG. 2 shows the soil processing roller of FIG. 1 having replaceable tools designed as chisels attached to the tool holders;

[0033] FIG. 3 shows the soil processing roller of FIG. 1 having replaceable tools designed as pad feet attached to the tool holders;

[0034] FIG. 4 shows a perspective view of a roller tool on a carrier casing in viewing direction IV in FIG. 5;

[0035] FIG. 5 shows the roller tool of FIG. 4 in viewing direction V in FIG. 4;

[0036] FIG. 6 shows the roller tool of FIGS. 4 and 5 in an exploded view;

[0037] FIG. 7 shows a side view of the roller tool of FIGS. 4 and 5;

[0038] FIG. 8 shows a sectional view of the roller tool of FIGS. 4 and 5, in section along a line VIII-VIII in FIG. 7;

[0039] FIG. 9 shows a sectional view of the roller tool of FIGS. 4 and 5, in section along a line IX-IX in FIG. 7;

[0040] FIG. 10 shows a perspective view of a second tool holder part of the roller tool of FIGS. 4 and 5;

[0041] FIG. 11 shows a perspective view of a first tool holder part of the roller tool of FIGS. 4 and 5;

[0042] FIG. 12 shows a perspective view of a replaceable tool designed as a chisel;

[0043] FIG. 13 shows a side view of a replaceable tool designed as a pad foot;

[0044] FIG. 14 shows a perspective view of the replaceable tool of FIG. 13;

[0045] FIG. 15 shows another perspective view of the replaceable tool of FIG. 13.

[0046] In FIG. 1, a soil processing roller for a soil processing machine constructed, for example, in the manner of a soil compactor is generally denoted by 10. The soil processing roller 10 comprises a roller casing 12 surrounding a roller axis of rotation A and having an outer peripheral surface 14. A plurality of first tool holder parts 16 of tool holders, generally denoted by 18, of roller tools, generally denoted by 20, are fixed by welding on the outer peripheral surface 14 of the roller casing 12. The first tool holder parts 16 are arranged in a plurality of rings in succession in the direction of the roller axis of rotation A, in succession in the peripheral direction, wherein the first tool holder parts 16 that are arranged in rings in direct succession in the axial direction are arranged offset from one another in the peripheral direction.

[0047] FIG. 2 shows the soil processing roller 10 of FIG. 1 having the complete roller tools 20. In addition to the first tool holder parts 16 fixed by welding on the roller casing 12, these comprise second tool holder parts 22 and replaceable tools 24 in the form of chisels held by them on the first tool holder parts 16.

[0048] In the case of the soil processing roller 10 shown in FIG. 3, the roller tools 20 comprise roller tools 24′ carried on the tool holders 18 in the form of pad feet.

[0049] Before the structure of the roller tools 20, i.e., the structure of the tool holder 18 and the replaceable tools 24 or 24′, is discussed in more detail below, it is to be noted that in the soil processing rollers 10 shown in FIGS. 1 to 3, the tool holders 18 of the roller tools 20 are fixed directly on the roller casing 12 providing a carrier casing 26. In an alternative embodiment, a cladding casing constructed, for example, having a plurality of shell segments could be used as the carrier casing 26, which can be arranged surrounding the roller casing 12 of such a soil processing roller 10 if necessary.

[0050] In FIGS. 4 to 10, the roller tool 20 or the various components of the roller tool 20 can be seen partially assembled and partially individually. The roller tool 20 includes the first tool holder part 16 produced, for example, from a cast or forged component. This component has a plate-shaped attachment region 28 to be fixed on the outer peripheral surface 14 by welding and adapted to the curved outer peripheral contour of the carrier casing 16. It can be seen in FIG. 11 that the attachment region 28 is essentially surrounded in its entire peripheral region by a chamfer 30, so that the first tool holder part 16 can be fixed on the carrier casing 26 or on the outer peripheral surface 14 by a weld seam that preferably extends completely around the attachment region 28 and engages in the chamfer 30. In this way, a stable, solid bond is created between the carrier casing 26 and the first tool holder part 16.

[0051] The roller tool 20 or its tool holder 18 furthermore comprises the second tool holder part 22 shown in FIG. 10. On the first tool holder part 16, a tool holder part receptacle recess 32 is formed which is open on one side and in the direction away from the attachment region 28 and in which, in the assembled state, the second tool holder part 22 is accommodated in such a way that, together with the first tool holder part, it provides a flush transition between these two tool holder parts 16, 22 and in the transition between these two tool holder parts 16, 22 there are essentially no steps that could result in damage, in particular to the second tool holder part 22.

[0052] On end faces 34, 36 of the first tool holder part 16, which are oriented in a longitudinal direction of the first tool holder part 16 and, when attached to a soil processing roller 10 or a carrier casing 26, are oriented in the circumferential direction, there are breaking projections 38, 40 that protrude radially outwards in the circumferential direction or with respect to the roller axis of rotation A, which, in particular when replaceable tools 24 designed as chisels are used, additionally contribute to the crushing of the soil to be broken up.

[0053] A tool holder opening, generally denoted by 42, is formed in the tool holder 18. This is elongated in the direction of an opening longitudinal axis L.sub.O and is therefore open radially outwards with respect to the roller axis of rotation A when the tool holder 18 is attached to a carrier casing 26. In the assembled state of the two tool holder parts 16, 18, the tool holder opening 42 is delimited by the two tool holder parts 16, 22 in the circumferential direction. The first tool holder part 16 delimits the tool holder opening 42 in a first peripheral region U.sub.1. The second tool holder part 22 delimits the tool holder opening 42 in the remaining second peripheral region U.sub.1, which, as the combination of FIGS. 10 and 22 make clear, is significantly smaller than the first peripheral region U.sub.2.

[0054] When the second toolholder part 22 is not attached to the first toolholder part 16, the tool holder opening 42 formed largely in the first toolholder part 16 or the part thereof formed in the first toolholder part 16 is open transversely to the opening longitudinal axis L.sub.O, in particular to the tool holder part receptacle recess 32. The toolholder 24 or 24′ is therefore inserted laterally, i.e., transversely with respect to the opening longitudinal axis L.sub.O, into the part of the tool holder opening 42 formed in the first tool holder part 16 when a roller tool 20 is assembled.

[0055] In order to achieve stable cohesion of a replaceable tool 24 or 24′ with the tool holder 18 or the first tool holder part 16 in the direction of the opening longitudinal axis L.sub.O, a replaceable tool holding formation generally denoted by 44 is provided on the first tool holder part 16. This comprises a holding projection 46 that protrudes radially inwards with respect to the opening longitudinal axis L.sub.O and extends, for example, over the first peripheral region U.sub.1.

[0056] On a replaceable tool shaft 48 of the replaceable tool 24 shown, for example, in FIG. 12 and designed in the form of a chisel, in association with the replaceable tool holding formation 44 or the holding projection 46, a counter holding formation 51 is formed having a holding recess 50 set back radially inwards with respect to a shaft longitudinal axis L.sub.S. Complementary to the structure of the holding projection 46 tapering radially inward with respect to the opening longitudinal axis L.sub.O, the holding recess 50 also has a structure that tapers radially inwards, for example, tapering conically, with respect to the shaft longitudinal axis L.sub.S.

[0057] When, for example, the replaceable tool 24 shown in FIG. 12 is inserted laterally into the first tool holder part 16, the holding projection 46 enters the holding recess 50. Due to the interaction of the holding projection 46, which tapers and thus generates a wedge effect, with the holding recess 50, the replaceable tool 24 is moved in the direction of the opening longitudinal axis L.sub.O or the shaft longitudinal axis L.sub.S in the direction of the first tool holder part 16 or its attachment region 28, i.e., when it is attached to a soil processing roller 10, it is pre-tensioned radially inward with respect to the roller axis of rotation A. The replaceable tool 24 comes into contact with a counter support region 54 thereof formed on a body region 52 against a replaceable tool support region 56 formed on the tool holder 18.

[0058] The replaceable tool support region 56 comprises a ring-like replaceable tool support surface 58 essentially completely surrounding the replaceable tool opening 42. A first support surface part 60 of the replaceable tool support surface is formed on the first tool holder part 16, and a second replaceable tool support surface part 62 is formed on the second tool holder part 22. In accordance with the different extension lengths of the first and second peripheral regions U.sub.1, U.sub.2 around the opening longitudinal axis L.sub.O, the first and second replaceable tool support surface parts 60, 62 are also dimensioned differently in the peripheral direction around the opening longitudinal axis L.sub.O.

[0059] The second tool holder part 22 is fixed on the first tool holder part 16 by two fasteners 64, 66 formed, for example, as screw bolts. Each of these fasteners 64, 66 comprises an externally threaded shaft 68 having a head 70. Associated with each fastener 64, 66, in the first tool holder part 18 a fastener passage opening 72, 74 is formed, through which the externally threaded shaft 68 of a respective fastener 64, 66 can be guided. Furthermore, associated with each fastener 64, 66 or each fastener passage opening 72, 74 in the first tool holder part 16, a fastener formfitting engagement opening 76, 78 is formed in the second tool holder part 22. The fastener formfitting engagement openings 76, 78 can be formed as internally threaded openings into which the shafts 68 of the fasteners 64, 66 can be screwed when the second tool holder part 22 is arranged in the tool holder part receptacle recess 32, in order in this way to clamp the second tool holder part 22 firmly against the first tool holder part 16.

[0060] In order to be able to accommodate the fasteners 64, 66 completely in the tool holder 18, expanded head receptacle regions 80, 82 are provided in the region of the fastener passage openings 72, 74, into which the heads 70 of the fasteners 64, 66 can plunge completely.

[0061] It can be seen in FIG. 10 that no part of the holding formation 44 of the tool holder 18 is formed on the second tool holder part 22. The second tool holder part 22 is therefore essentially used to press the replaceable tool shaft 48 laterally into that part of the tool holder opening 42 formed in the first tool holder part 16 and, in the process, to press the holding projection 46 of the first tool holder part 16 into the holding recess 50 of the replaceable tool shaft 48 and thus continue to press the replaceable tool 24, which is designed as a chisel, for example, with its counter support region 54 against the replaceable tool support region 56. The counter support region 54 is essentially provided by a ring-like surface 84 on the replaceable tool body 52 that surrounds the replaceable tool shaft 48 and is oriented essentially orthogonally to the shaft longitudinal axis L.sub.S.

[0062] A replaceable tool 24′ designed as a pad foot is shown in more detail in FIGS. 13 to 15. This also has a replaceable tool body 52 providing the pad foot structure, from which the replaceable tool shaft 48 having the holding recess 50 formed therein extends. In this replaceable tool 24′, a surface 84 formed on the replaceable tool body 52 and essentially surrounding the replaceable tool shank 48 with a ring-like structure and protruding somewhat, for example in the direction of the shaft longitudinal axis L.sub.S, also provides the counter support region 54 to be supported on the replaceable tool support surface 58.

[0063] An anti-rotation projection 86 is provided on a peripheral side of the replaceable tool body 52. In the assembled state, this engages over the second tool holder part 22 and thus prevents the replaceable tool 24′ from rotating around the shaft longitudinal axis L.sub.S.

[0064] When attaching such a replaceable tool 24′ designed as a pad foot to the tool holder 18, as described above, the replaceable tool shaft 48 is inserted laterally into the first tool holder part 16, so that the holding projection 46 and the holding recess 50 enter. In order to prevent mutual interference of the anti-rotation projection 86 with the second tool holder part 22, before the replaceable tool shaft 48 is laterally inserted into the tool holder opening 42, the second tool holder part 22 is positioned on the replaceable tool 24′ in such a way that the anti-rotation projection 86 already overlaps the second tool holder part 22. The second tool holder part 22 and the replaceable tool 24′ are then moved together towards the first tool holder part 16, so that the replaceable tool shaft 48 laterally enters the part of the tool holder opening 42 formed in the first tool holder part, and the second tool holder part 22 essentially simultaneously enters the tool holder part receptacle recess 32. Thereafter, the two tool holder parts 16, 22 holding the replaceable tool together can be fixed on one another by the fasteners 64, 66.