Milling wheel for groove wall milling machine and method for retrofitting milling wheel

Abstract

The invention relates to a milling wheel for a groove wall milling machine, comprising a drum-shaped hub, on the outer periphery of which a receptacle for milling teeth and at least one carrier for turning teeth are arranged, the carrier having a bearing bolt as a pivot axis for pivotably and releasably holding the turning teeth. According to the invention, it is provided that a fastening device is arranged on the carrier, which fastening device is designed to hold the fastening teeth supported on the support bolt in a stationary position.

Description

Technical Field

[0001] The invention relates to a slot wall milling machine ( A milling wheel (sometimes called a continuous wall milling machine) has a drum-shaped hub, on the outer circumference of which there are receptacles for milling teeth and at least one bracket for a tilting tooth (Klappzahn), wherein the bracket has a supporting bolt as a pivot axis for holding the tilting tooth in a pivotable and releasable manner.

[0002] Furthermore, the invention relates to a method for converting a milling wheel according to claim 12 . Background Art

[0003] Such milling wheels for slot milling machines are known, for example, from EP 1 548 192 B1 or EP 0 291 027 B1. In slot milling machines with a milling wheel arranged laterally on a bearing cover (Lagerschild, sometimes called an end cover), there is the problem that the soil area directly below the bearing cover cannot be easily removed by the milling wheel. In the case of softer soil, the soil bridge formed below the bearing cover can be easily broken by the bearing cover using the weight of the slot milling machine. In the case of harder soil, the soil bridge below the bearing cover is problematic and can lead to undesired deflections of the slot milling machine.

[0004] To avoid this, a so-called tilting tooth can be pivotably or tiltably mounted on the milling wheel on the side of the milling wheel adjacent to the support cover on the support. For example, by means of a cam control system with a control strip on the support cover and a control arm on the tilting tooth, the tilting tooth can be tilted out into the area below the support cover in order to clear the area of ​​soil located below it, and when the milling wheel continues to rotate, the tilting tooth is tilted back again, so that the support cover is not damaged by the milling tooth.

[0005] If the turning teeth are not needed for softer soils, the turning teeth represent a hindrance to efficient milling operation, since the rotational speed of the milling wheel is limited by the turning teeth. At higher rotational speeds, correspondingly more impacts may occur due to the turning, and significant friction and correspondingly high wear on the cam control system may occur.

[0006] It is known to remove the tilting teeth in this case. However, the lack of removal teeth on the outer circumference of the milling wheel also impairs the efficient milling operation and leads to high wear on the carrier without removal teeth.

[0007] It is also known to provide different milling wheels for different types of soil. The milling wheels then have to be replaced. However, replacing milling wheels weighing up to several tons is time-consuming and labor-intensive. Summary of the invention

[0008] The object of the present invention is to specify a milling wheel for a slot wall milling machine and a method for retrofitting, with which a particularly efficient milling operation can be achieved.

[0009] This object is achieved on the one hand by a milling wheel having the features of claim 1 and on the other hand by a method having the features of claim 12. Preferred embodiments are given in the dependent claims.

[0010] The slot wall milling machine according to the invention is characterized in that a fixing device is arranged on the support and is designed to hold a fixing tooth supported on a support bolt in a fixed position.

[0011] A first aspect of the present invention is that, in the case of a swingable or flippable holding of a flipping tooth, a fixing device is provided at the support, by means of which a removal tooth arranged on a supporting bolt of the support can be fixed or fastened in a stationary position, preferably in a position extending radially outward. For this purpose, it can be particularly suitable to remove the flipping tooth swingably supported at the supporting bolt and replace the flipping tooth by a special fixing tooth. Alternatively, it is also possible to modify an existing flipping tooth, for example by disassembling a section with a control arm, so that the flipping tooth is then held in a fixed position at the supporting bolt by means of a fixing device and can no longer be flipped or swung. It can be ensured here that a cam control system for forcibly controlling the flipping movement of the flipping tooth is inoperative, for example by loosening the control arm at the flipping tooth.

[0012] The fixing device can be designed in principle in any known manner, wherein the position fixation of the fixing tooth can be realized in a form-fitting and / or force-fitting manner. For force-fitting fixation, a tensioning device, preferably with a tensioning clamp, can be arranged in particular. Form-fitting fixation can be realized via corresponding engagement elements or stop elements.

[0013] A preferred embodiment of the invention is that the support has two bearing seats which are spaced apart from each other and between which bearing bolts extend and which are releasably fixed on the bearing seats. The bearing bolts preferably extend in a transverse direction relative to the axis of rotation of the milling wheel so that the tilting teeth can be tilted around the bearing bolts, in particular in the direction of a bearing cover, on which the milling wheel is rotatably supported. The support with the two bearing seats is preferably located at the outer circumference of the drum-shaped hub in an edge region which adjoins the bearing cover of the slot wall milling machine. Preferably, a plurality of supports, in particular two, three or four supports, are arranged uniformly distributed around the circumference on each milling wheel.

[0014] According to another embodiment of the present invention, preferably, a first receiving hole for receiving the first end of the bearing bolt is formed on the first bearing seat, and a second receiving hole for receiving the second end of the bearing bolt is formed on the second bearing seat. The bearing bolt is preferably cylindrically shaped and forms the pivot axis. By receiving the bearing bolt in two receiving holes located opposite each other in the two bearing seats, a stable support of the bearing bolt is achieved.

[0015] According to the invention, an advantageous development is that at least one receiving hole is designed as a through hole for pushing in and / or pushing out the bearing bolt. The two receiving holes have a common center axis, wherein at least one receiving hole is designed as a through hole. Thus, the bearing bolt can be pushed through the preferably cylindrical through hole in a simple manner and inserted into the other receiving hole. The other receiving hole can be a blind hole or also a through hole. The fastening of the bearing bolt in the receiving hole can be achieved by a suitable locking device, for example by means of one or more locking screws.

[0016] The fixing device can be constructed in principle in any suitable manner, and is configured to keep the removal tooth held on the support bolt in a fixed position so that the removal tooth cannot swing on the cylindrical support bolt. It is particularly preferred that the fixing device has at least one stop hole for accommodating the stop bolt in the bracket. In particular, a stop hole can be introduced at one or both bearing seats of the bracket, into which the stop bolt is introduced in order to fix the fixing tooth at the support bolt in a form-fitting and / or force-fitting manner. The stop bolt therefore forms a form-fitting connection between the bracket and the removal tooth supported at the support bolt. This achieves a precise positional fastening of the tooth at the support bolt.

[0017] Another advantageous embodiment of the present invention is that two retaining holes are provided and the first retaining hole is formed at the first bearing seat and the second retaining hole is formed at the second bearing seat. In particular, a through hole can be formed at the fixing tooth to be received, wherein the removal tooth is fixed by means of a single retaining bolt in such a way that the removal bolt extends from the first retaining hole through the through hole at the removal tooth to the second retaining hole at the opposite bearing seat. This allows the fixing tooth to be securely fastened to the support despite the cylindrical bearing bolt.

[0018] A preferred embodiment of the present invention is that in order to form a milling wheel with a tilting tooth on the at least one support, the tilting tooth is pivotably supported on the support bolt. The tilting tooth in the sense of the present invention is a removal tooth pivotably supported on the support bolt. This creates a milling wheel that can be used in a conventional manner, wherein the tilting tooth can be pivoted from a radially directed retracted position for passing by the support cover to an inclined tilting or removal position during milling operation, in which the tilting or removal position can remove the ground material under the support cover. During the rotation of the milling wheel, the tilting tooth can be pivoted or adjusted between two positions in a basically known manner via a control arm or a control section on the tilting tooth in cooperation with a control strip (which is fixed relative to the support cover). The removal tooth can be configured with at least one cutting edge, for example as a cutting tooth, and / or with at least one removal tip, for example as a round-shanked chisel.

[0019] According to one embodiment of the invention, a blind plug is inserted into the at least one retaining hole in order to form a milling wheel with tilting teeth. If a retaining hole of the fastening device is not required when using a milling wheel with tilting teeth in a conventional manner, the inserted blind plug ensures that the retaining hole on the support is not unnecessarily worn or clogged by soil material.

[0020] According to another embodiment of the invention, it is preferred that, in order to form a milling wheel with fixed teeth, a fixed tooth is supported on the support bolt, which is fixedly held by means of a fixing device. The fixed tooth in the sense of the invention is a removal tooth, which is held in a fixed position on the support bolt by means of a fixing device. The fixed tooth can have a radial orientation, in particular, which corresponds to the orientation of the other removal teeth on the milling wheel or is as similar as possible to this and in particular ensures that it passes by the support cover. The fixed tooth does not cause ground removal under the support cover.

[0021] Preferably, the fixed tooth does not correspond to the tilting tooth. In order to refit the milling wheel, it is necessary in this case to first remove the tilting tooth and its control arm and replace the tilting tooth with the fixed tooth. The fixed tooth is also supported on a preferably cylindrical support bolt, wherein the fixed tooth is however designed to be fastened in the desired position on the support by means of a fixing device. The fixed tooth can be designed in particular to be shorter than the tilting tooth.

[0022] It is particularly advantageous here that, in order to form a milling wheel with a fixing tooth, a locking bolt is inserted into the at least one locking hole in order to immobilize the fixing tooth and the at least one locking bolt extends into a matching recess in or on the fixing tooth and fixes the fixing tooth on the support bolt.

[0023] In principle, a single retaining bolt can be provided at each bearing seat, which engages in a corresponding matching recess on the fixing tooth and thus secures the fixing tooth in a form-fitting manner. Preferably, a single retaining bolt can be provided, which extends, in particular, through a receptacle designed as a perforation on the fixing tooth from a first bearing seat of the support to a second bearing seat. This achieves a particularly stable fastening of the fixing tooth on the support. The fixing tooth here rests on the bearing bolt on the one hand and on the retaining bolt on the other hand.

[0024] The invention further comprises a slot wall milling machine having a milling frame, on the underside of which at least one bearing cover is arranged for rotatably mounting at least one milling wheel, wherein at least one milling wheel according to the invention is arranged.

[0025] Preferably, the slot wall milling machine has a plurality of milling wheels, in particular a milling wheel on each side of the plate-shaped support cover. In this way, a pair of milling wheels with preferably coaxial axes of rotation are formed on the support cover. It is particularly preferred that two support covers are arranged on the underside of the milling frame, each of which has a pair of milling wheels.

[0026] The invention can be used in any type of slot wall milling machine, in particular in a CSM milling machine (for which the milling wheel has the removal function and the mixing function for producing soil mortar and does not have to be provided with a guide frame) or in a milling machine with a bracket-type guide frame, for example for a single or two-stage process.

[0027] The invention further comprises a method for retrofitting a milling wheel according to the invention, wherein the method is characterized in that a tilting tooth is pivotably supported on a support bolt of at least one support of the milling wheel, the tilting tooth is loosened and removed, and a fixed tooth is arranged on the support bolt, the fixed tooth being held in a fixed position on the support by a fixing device. In this way, milling wheels and in particular milling wheels on slot milling machines can be efficiently retrofitted. By replacing one or more tilting teeth with fixed teeth, it is possible to operate the milling wheel at a higher rotational speed when the ground is soft. The cam control system of the tilting tooth is protected and guarded against unnecessary wear when used in this way.

[0028] A preferred embodiment of the invention is that the fixed teeth on the support of the milling wheel are loosened and removed from the support bolts and that a tilting tooth is arranged on the support bolts, which tilting tooth is pivotably mounted on the support bolts of the at least one support of the milling wheel. Thus, a reverse conversion can also be achieved without problems, so that for a milling wheel with fixed teeth, the tilting tooth can be easily used in an existing support with support bolts, if this is necessary when milling harder ground layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention is further explained below according to a preferred embodiment schematically presented in the drawings. In the drawings:

[0030] Figure 1 A perspective view of a construction machine with a slot wall milling machine according to the present invention is shown;

[0031] Figure 2 An enlarged view of a slot wall milling machine according to the present invention is shown;

[0032] Figure 3 A perspective view of a milling wheel with tilted teeth according to the present invention is shown;

[0033] Figure 4 A cross-sectional view showing a detail of a milling wheel with tilted teeth according to the invention;

[0034] Figure 5 A partially cut-away perspective view of a support with tilting teeth on a milling wheel according to the invention is shown;

[0035] Figure 6 A perspective view of a milling wheel with fixed teeth according to the invention is shown.

[0036] Figure 7 Shows the Figure 6 A partially cutaway perspective view of a support at a milling wheel with fixed teeth. DETAILED DESCRIPTION

[0037] A construction machine 1 with a slot wall milling machine 10 according to the present invention is used in Figure 1 It is presented in the figure that the groove wall milling machine is configured as a so-called CSM milling machine. The construction machine 1 can have a support device 2, which can be configured to travel together with a substructure (Unterwagen, sometimes called chassis) 3. Preferably, the substructure 3 can include a crawler travel mechanism. A superstructure 4 is arranged on the substructure 3, and the superstructure is preferably supported in a manner that can rotate around a vertical rotation axis. At the support device 2, in particular the superstructure 4, a pillar 5 that is preferably vertical during operation can be articulated via an adjustment mechanism 7. Via the adjustment mechanism 7, the distance between the pillar 5 and the superstructure 4 and the angle of the pillar relative to the vertical can preferably be changed.

[0038] The slot milling machine 10 according to the invention can be moved vertically along the support 5 by means of a lifting device 6 in order to be introduced into the ground. In the embodiment presented, the lifting device 6 has a guide rod, by means of which the slot milling machine 10 can be guided along the support 5. In addition, a thrust force can also be exerted downwards on the slot milling machine 10 via a thrust device (not presented in more detail) via the rod, in order to increase the contact force during milling. A lever-shaped lifting device 6 can advantageously be used when the slot milling machine 10 has a small, compact milling frame 12, which has no guide surfaces for guiding along the milled wall.

[0039] In principle, the lifting device 6 can also have supporting ropes instead of guide rods, wherein the slot milling machine 10 then preferably has a box-shaped milling frame 12 with guide surfaces in order to guide the slot milling machine 10 along the wall of the milled slot to be formed.

[0040] In accordance with Figure 2 In the slot wall milling machine 10 of the present invention, a coupling device for a lifting device can be arranged on the upper side of the milling frame 12 and two plate-shaped support covers 14 can be preferably arranged on the lower side, on which the milling wheels 20 according to the invention are supported on both sides. The milling wheels 20 on the common support cover 14 form a so-called pair of milling wheels 20, which can rotate about a common axis of rotation. The rotation can be caused by a suitable rotary drive, for example by a hub motor in the hub of the milling wheel 20 or via one or more drive motors on the milling frame 12, wherein the torque transmission can then be realized via a corresponding transmission assembly.

[0041] Single milling wheel 20 Figure 3 The milling wheel preferably has a drum-shaped hub 22 , on the outer circumference of which radially protruding, plate-shaped receptacles 24 are arranged distributed thereon, in which milling teeth 26 are each releasably and replaceably secured in a manner known in principle.

[0042] A support 30 for a tilting tooth 50 is arranged on the inner side of the hub 22 pointing to the bearing cover 14. The support 30 can have a first bearing seat 31 and a second bearing seat 32 spaced apart in the circumferential direction, between which the tilting tooth 50 is pivotably supported. The tilting tooth 50 can preferably have, for example, a middle bearing section 51, which is radially followed outward by a receiving section 52 for a releasable container and holding the milling tooth 26. In addition, a control arm 54 extending radially inwardly away from the bearing section 51 with a guide element 56 can be arranged for controlling the pivoting movement of the tilting tooth 50. One or more removal strips 35 can be arranged on the outer sides of the two bearing seats 31, 32 pointing away from the tilting tooth 50 in order to reduce wear and to improve the removal efficiency.

[0043] A mechanical control system known in principle for controlling the movement of the tilting teeth 50 during the rotation of the milling wheel 20 is based on Figure 4 The schematic diagram is obtained. Figure 4 The cross-sectional view of FIG. 1 shows the lower region of the support cap 14, on both sides of which a milling wheel 20 with a hub 22, which is only partially shown, is arranged. On the outer side of the support cap 14, an annular control strip 16 is arranged, each with an outwardly directed control surface for forming a cam control system.

[0044] exist Figure 4 On the right-hand milling wheel 20 in the middle, a plate-shaped receptacle 24 for the milling tooth 26 is present on the hub 22 on the axial outside, and a support 30 with a first bearing seat 31 is present on the axial inside. On the support 30, a preferably substantially cylindrical bearing bolt 38 can extend between the bearing seats 31, 32, which forms a pivot axis 39 for the tilting tooth 50.

[0045] The tilting tooth 50 is pivotably supported on the support bolt 38 of the bracket 30 with its support section 51 and the through hole 53 arranged therein. The receiving section 52 of the tilting tooth 50 extends downward to receive the milling tooth 26. Radially in the direction of the hub 22, a control arm 54 with a guide element 56 is arranged on the support section 51 of the tilting tooth 50, which serves as a kind of control cam. The tilting tooth 50 is supported here in such a way that the guide element 56 is pressed against the annular control strip 16 on the support cover 14.

[0046] Corresponding to the outer control surface on the control strip 16, the tilting tooth 50 can be in the retracted position (in which the receiving section 52 and the milling tooth 26 are oriented essentially radially relative to the hub 22 and relative to the axis of rotation of the milling wheel 20) and in the retracted position. Figure 4 oscillates between flipped or removed positions as presented. Figure 4 In the removal position shown in FIG. 1 , the milling teeth 26 on the tilting teeth 50 are pivoted into the area below the support cover 14 in order to remove the ground material in this position and thus help to protect the support cover 14 and increase the removal performance and accurately guide the milling wheel 20 in the ground. The tilting teeth 50 can be in the tilted position during the rotation, preferably over 180°, in order to remove the ground in the area of ​​the support cover 14 over the entire groove length.

[0047] The milling wheel 20 with the support 30 according to the invention is described in more detail below in conjunction with the Figure 5The support 30 according to the invention has a first bearing seat 31 with a first receiving hole 33 and a second bearing seat 32 with a second receiving hole 34, which is oriented coaxially with the first receiving hole 33. In order to receive the tilting tooth 50, the support bolt 38 can be pushed into the receiving holes 33, 34, which are preferably open on both sides, and pushed through the through-hole 53 on the tilting tooth 50, as in Figure 5 The tilting tooth is supported via a slot 58 on a stationary support bolt 38 in a manner that it can pivot about a pivot axis 39 .

[0048] Furthermore, the bracket 30 according to the present invention has a first stop hole 41 formed at the first bearing seat 31 and a second stop hole 42 formed at the second bearing seat 32, and the first stop hole and the second stop hole are also implemented as through holes. Figure 5 In the illustration of , the blind plug 46 is inserted into the two locking holes 41 , 42 , since the locking holes 41 , 42 are not required when the tilting tooth 50 is pivotably held.

[0049] According to the invention, the thus supported tilting tooth 50 can be replaced by a fixed tooth 60 or possibly retrofitted thereto. Figure 6 and 7 The feasibility according to the present invention is presented in Figure 5 The tilting tooth 50 is removed from the bracket 30 by loosening the support bolt 38. Then the fixing tooth 60 is inserted into the bracket 30 between the first support seat 31 and the second support seat 32, wherein the support bolt 38 is pushed into the two receiving holes 33, 34 and the through hole 63 on the fixing tooth 60 again and fixed.

[0050] The fixed tooth 60 has, similar to the tilting tooth 50, a bearing section 61 and a receiving section 62 adjoining radially outwards for releasably receiving the milling tooth 26. In the embodiment shown, however, the fixed tooth 60 has no control arm for interacting with a control strip on the bearing cap.

[0051] However, the support section 61 of the fixing tooth 60 is radially inwardly followed by the fixing section 64 with the recess 66 for forming the through-hole. To form the fixing device 40, the locking bolt 48 is introduced into the two locking holes 41, 42 in the bearing seats 31, 32. The blind plug 46, which may be present, can be removed from the locking holes 41, 42 beforehand. The locking holes 41, 42 in the bearing seats 31, 32 are coordinated with the fixing tooth 60 on the bearing bolt 38 in such a way that they are coaxially aligned with the at least one recess 66, so that the locking bolt 48 extends from the first locking hole 41 in the first bearing seat 31 through the recess 66 on the fixing tooth 60 to the second locking hole 42 on the bearing seat 32.

[0052] The fixing tooth 60 is therefore seated both on the support bolt 38 and on the stop bolt 48, wherein the two bolts 38, 48 are each held by two bearing seats 31, 32. This results in a stationary, non-pivotable support of the fixing tooth 60 in the support 30. The milled teeth 26 held on the fixing tooth 60 are preferably oriented radially in this case, so that it can easily pass by the bearing cover 14.

Claims

1. A milling wheel for a slot milling machine (10), comprising a drum-shaped hub (22), on the outer circumference of which a receptacle (24) for a milling tooth (26) and at least one support (30) for a tilting tooth (50) are arranged, wherein the support (30) has a bearing bolt (38) for holding the tilting tooth (50) so that it can be pivoted and releasably held about a pivot axis (39), It is characterized in that A fixing device (40) is arranged on the support (30) and is designed to hold a fixing tooth (60) supported on the support bolt (38) in a fixed position.

2. The milling tooth according to claim 1, It is characterized in that The support (30) has two bearing seats (31, 32) which are spaced apart from one another and between which the bearing bolt (38) extends and on which it is releasably secured.

3. The milling wheel according to claim 1 or 2, It is characterized in that A first receiving hole (33) for receiving a first end of the supporting bolt (38) is formed on the first bearing seat (31), and a second receiving hole (34) for receiving a second end of the supporting bolt (38) is formed on the second bearing seat (32).

4. The milling wheel according to claim 3, It is characterized in that At least one receiving opening (33, 34) is designed as a through-hole for pushing in and / or pushing out the bearing bolt (38).

5. The milling wheel according to any one of claims 1 to 4, It is characterized in that The fixing device (40) has at least one retaining hole (41, 42) for receiving a retaining bolt (48) in the bracket (30).

6. The milling wheel according to claim 5, It is characterized in that Two stop holes (41, 42) are provided, and the first stop hole (41) is configured at the first bearing seat (31), and the second stop hole (42) is configured at the second bearing seat (32).

7. The milling wheel according to any one of claims 1 to 5, It is characterized in that In order to form a milling wheel (20) with a tilting tooth (50) on the at least one carrier (30), the tilting tooth (50) is pivotably mounted on the support bolt (38).

8. The milling wheel according to claim 7, It is characterized in that In order to form a milling wheel (20) with tilting teeth (50), a blind plug (46) is inserted into the at least one retaining hole (41, 42).

9. The milling wheel according to any one of claims 1 to 6, It is characterized in that In order to form a milling wheel (20) with a fixing tooth (60), a fixing tooth (60) is supported on the support bolt (38) and is fixedly secured by means of the fixing device (40).

10. The milling wheel according to claim 9, It is characterized in that In order to form a milling wheel (20) with the fixing tooth (60), a stop bolt (48) is inserted into the at least one stop hole (41, 42) in order to immobilize the fixing tooth (20) and The at least one retaining bolt (48) extends into a matching recess (66) in the securing tooth (60) and thus secures the securing tooth (60) to the bearing bolt (38).

11. A slot wall milling machine having a milling frame (12), on the underside of which at least one bearing cover (14) is arranged for rotatably supporting at least one milling wheel (20), It is characterized in that At least one milling wheel (20) according to any one of claims 1 to 10 is arranged.

12. A method for retrofitting a milling wheel (20) according to any one of claims 1 to 10, It is characterized in that A tilting tooth (50) is pivotably mounted on a support bolt (38) of the at least one support (30) of the milling wheel (20), which tilting tooth is loosened and removed, and A fixing tooth (60) is arranged on the bearing bolt (38) and is held in a fixed position on the support (30) by the fixing device (40).

13. The method according to claim 12, It is characterized in that The fixing teeth (60) at the support (30) of the milling wheel (20) are loosened and removed from the support bolts (38), and A tilting tooth (50) is arranged on the bearing bolt (38) and is pivotably mounted on the bearing bolt (38) of the at least one carrier (30) of the milling wheel (20).

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