CUTTING WHEEL ASSEMBLY FOR A SLURRY WALL CUTTER

Abstract

The present invention relates in general to slurry wall cutters for cutting slurry walls in specialist foundation engineering. The invention relates in particular to the cutting wheel assembly for such a slurry wall cutter (1), comprising a rotationally drivable cutter hub (8) and a cutting wheel (3) which can be detachably fastened to the cutter hub for conjoint rotation. According to the invention, the cutting wheel and the cutter hub are clamped against one another at the end faces thereof and are interlockingly secured to one another in order to transmit the high operating forces non-frictionally or at least not only frictionally. According to the invention, the end faces of the cutting wheel and the cutter hub that can be placed against one another are provided with lateral teeth (16, 17) which mesh with one another for conjoint rotation. The meshing pair of lateral teeth allows the cutter hub and the cutting wheel to be interlockingly held relative to one another for conjoint rotation. At the same time, the end faces lying against one another can also transmit axial forces such that the cutting wheel is untiltably held in place.

Claims

1. A cutting wheel assembly for a slurry wall cutter having a cutter hub and a cutting wheel that is releasably fastened to the cutter hub in a rotationally fixed manner, wherein the cutter hub is rotatingly drivable, wherein an end face of the cutter hub and an end face of the cutting wheel are placeable against one another, and wherein the end face of the cutter hub and the end face of the cutting wheel have shape matched connectors that are rotationally fixedly engageable with one another.

2. The cutting wheel assembly of claim 1, wherein the end face of the cutter hub and the end face of the cutting wheel have surfaces free of toothed arrangements between the shape matched connectors.

3. The cutting wheel assembly of claim 1, further comprising axial clampers for axial tensioning the end face of the cutting wheel and the end face of the cutter hub against one another.

4. The cutting wheel assembly of claim 3, wherein the shape matched connectors comprise end toothed arrangements, and wherein the axial clampers comprise screws and/or threaded bolts that are arranged along a partial circle passing through the end toothed arrangements.

5. The cutting wheel assembly of claim 4, wherein the end toothed arrangements of the cutter hub and the cutting wheel each have a tooth groups arranged in a circumferential direction spaced apart from one another.

6. The cutting wheel of claim 5, wherein each of the tooth groups has a of teeth, wherein the teeth of each of the tooth groups has teeth, wherein the teeth of each of the tooth groups are aligned parallel with one another, and wherein the tooth groups are arranged rotated relative to one another such that the teeth of different tooth groups extend inclined at an acute angle with respect to one another.

7. The cutting wheel assembly of claim 4, wherein the end toothed arrangements have straight teeth having tooth tips that define a straight extent.

8. The cutting wheel assembly of claim 5, wherein a middle tooth of at least one of the tooth groups is arranged radially to an axis of rotation of the cutter hub and of the cutting wheel, and wherein all the other teeth of the at least one of the tooth groups are arranged parallel to the axis of rotation.

9. The cutting wheel assembly of claim 6, wherein the teeth are each frustoconically contoured when viewed in cross-section.

10. The cutting wheel assembly of claim 6, wherein the teeth have planar tooth flanks and/or have straight tooth flanks when viewed in cross-section that are set at a wedge angle in the range of 2 times 50°, 2 times 15°, or 2 times 40° to 2 times 25°.

11. The cutting wheel assembly of claim 4, further comprising a fastening flange releasably fastened to a cutting wheel body that supports cutting tools, and wherein the fastening flange comprises the end toothed arrangement of the cutting wheel.

12. The cutting wheel assembly of claim 4, wherein a hub plate or a hub flange comprises the end toothed arrangement of the cutter hub, and wherein the hub plate or the hub flange is releasably fastened to a hub pot.

13. The cutting wheel assembly of claim 4, wherein the end toothed arrangements are configured such that the cutting wheel is fastenable to the cutter hub in a maximum of six different rotary positions, or a maximum of two different rotary positions, or a maximum of only one rotary position relative to the cutter hub.

14. The cutting wheel assembly of claim 4, wherein force and/or torque is transmittable equally in two opposite directions of rotation by the end toothed arrangements.

15. The cutting wheel assembly of claim 1, wherein an output part of a transmission stage comprises the cutter hub, and wherein the cutting wheel is connected to a cutting drive in a torque transmittable manner via the output part of the transmission stage.

16. The cutting wheel assembly of claim 15, wherein the transmission stage comprises a planetary gear, and wherein a planetary carrier of the planetary gear comprises the cutter hub.

17. A slurry wall cutter having the cutting wheel assembly of claim 1.

18. The slurry wall cutter of claim 17, wherein the cutting wheel and the cutter hub are supported at an elongate upright cutting frame that supports a cutting drive and is suspended at a movable support unit standing on the ground.

19. The cutting wheel assembly of claim 15, wherein the cutter hub comprises a hub pot.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The invention will be explained in more detail in the following with reference to a preferred embodiment and to associated drawings. There are shown in the drawings:

[0026] FIG. 1: a schematic, perspective representation of a slurry wall cutter in accordance with an advantageous embodiment of the invention;

[0027] FIG. 2: a perspective, partially sectional representation of a cutting wheel and of a cutter hub of the slurry wall cutter of the preceding Figure, with the cutter hub and the cutting wheels being shown in the state mounted at one another;

[0028] FIG. 3: a perspective, partially sectional representation of the cutting wheel and of the cutter hub similar to FIG. 2, with the cutting wheel and the cutter hub being shown in the state disassembled from one another;

[0029] FIG. 4: a plan view of the end faces of the cutting wheel and of the cutter hub of the preceding Figures that are end faces each having an end toothed arrangement; and

[0030] FIG. 5: a partially sectional view along the line A-A in FIG. 4 which shows the mutually engaging end toothed arrangements of the cutter hub and cutting wheel.

DETAILED DESCRIPTION

[0031] As FIG. 1 shows, the slurry wall cutter 1 can have an elongate cutting frame 2 arranged as upright that can be configured as a lattice carrier and/or can comprise two laterally arranged longitudinal guide sections. The cutting frame 2 can have at least two cutting wheels 3 at a lower end section, said cutting wheels 3 being arranged next to one another and being able to be rotarily drivable about respective horizontal axes of rotation, with the axes of rotation of the cutting wheels 3 being able to extend in parallel with one another in particular perpendicular to the flat side of the cutting frame 2.

[0032] The two cutting wheels 3 can here be driven oppositely to one another. A cutting drive 4 can be arranged above the cutting wheels 3 at a lower end section of the cutting frame 2 and can, for example, comprise one or more hydraulic motors that can drive said cutting wheels 3 via one or more transmission stages.

[0033] As FIG. 1 shows, the cutting frame 2 with the cutting wheels 3 can be held raisably and lowerably by a support unit 5 or can be suspended thereat. Said carrier support unit 5 stands on the ground in which the respective trench should be cut and can advantageously be configured as travelable. A cable excavator having a chassis, for example a tracked chassis 6, can in particular be provided as the support unit 5, with the cutting frame 2 being able to be raised and lowered by a boom 7 of the support unit 5.

[0034] As FIGS. 2 to 5 show, each cutting wheel 3 is fastened to a cutter hub 8 that is rotatably supported at the cutting frame 2 and is drivable by the cutting drive 4. The cutter hub 8 can here be formed by the output element of the cutter drive 4 or by an interposed transmission stage. Said transmission stage can in particular be configured as a planetary gear, with the cutter hub 8 being able to be formed, for example, by a planetary carrier of the planetary gear.

[0035] The cutter hub 8 can in particular have a rotatably supported hub pot 9 that can have an end face 10 that is formed as planar, for example, and against which the cutting wheel 3 can be tensioned.

[0036] The cutting wheel 3 can be set up in the manner of a rim and can independently thereof have a circumferential wall 11 at whose outer side one or more rows of cutting tools 12, for example in the form of cutting bits, can be arranged. Said circumferential wall 11 is rigidly connected to a fastening flange 13 that can be formed as a plate or ring and that independently thereof has an end face 14 that is placeable against the end face 10 of the cutter hub 8. Said fastening flange 13 can extend approximately in a plane perpendicular to the axis of rotation and have a flat end face 14 that faces the cutter hub 8.

[0037] Said fastening flange 13 is advantageously releasably fastened to the remaining body of the cutter wheel 3 to be able to be replaced on wear. The fastening flange 13 can, for example, be fastened to the body of the cutting wheels 3 by means of a plurality of screws 15.

[0038] As FIGS. 3, 4, and 5 show, the end faces 10 and 14 of the cutter hub 8 and of the cutting wheel 3 that can be placed at one another are each provided with an end toothed arrangement 16, 17 that are formed matching one another in a shape matched manner and that are arranged such that the two end toothed arrangements 16 and 17 come into tooth engagement with one another when the end faces 10 and 14 of the cutter hub 8 and of the cutting wheel 3 are placed onto one another. The end toothed arrangements 16 and 17 are here configured such that they come into engagement with one another by a simple axial pushing onto one another of the cutting wheel 3 and the cutter hub 8 in parallel with the axis of rotation. If the two end toothed arrangements 16 and 17 are seated on one another so that they engage into one another, as FIG. 5 shows, the cutting wheel 3 is fixed to the cutter hub 8 with shape matching and rotational fixation.

[0039] The cutting wheel 3 can here be axially tensionable against the cutter hub 8 by axial tensioning means 18, that can advantageously comprise a plurality of threaded bolts 19, to secure the cutting wheel 3 on the cutter hub 8 and to hold the end toothed arrangements 16 and 17 in engagement by shape matching. As FIG. 3 shows, a plurality of threaded bolts 19 can be arranged distributed in the circumferential direction, can in particular be provided in the region of the end toothed arrangements 16 and 17, to fix the end toothed arrangements 16 and 17 uniformly in the engagement position.

[0040] As FIG. 4 shows, the end toothed arrangements 16 and 17 can each have a plurality of tooth groups 20—6 in the embodiment drawn—that can be arranged spaced apart from one another and evenly distributed, optionally also unevenly distributed, in the circumferential direction. The tooth groups 20 can in particular be arranged on a common partial circle and can each be separated from one another by toothed arrangement-free surfaces 21.

[0041] As FIG. 4 shows, each tooth group 20 can have a plurality of teeth 22 hat can each have tooth flanks extending as straight, with all the tooth flanks of a tooth group being able to be arranged in parallel with one another, while the tooth groups 20 can be rotated relative to one another or can be aligned in different directions. A respective middle tooth of a respective tooth group 20 can in particular extend in the radial direction with respect to the axis of rotation and can be respectively flanked to the right and to the left by teeth aligned in parallel therewith.

[0042] As FIG. 5 shows, the teeth 22 of the end toothed arrangements 16 and 17 can each be contoured as frustoconical, viewed in cross-section, with the tooth flanks of the frustoconical teeth 22 being able to extend at a wedge angle of, for example, 2 times 20°.

[0043] The teeth 22 can be truncated in a flat or planar manner in the region of the tooth tips. Independently thereof, the valleys between the teeth 22 or the dedendum regions can be rounded, cf. FIG. 5.