EP0291027A1 - Removal device - Google Patents

Removal device Download PDF

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Publication number
EP0291027A1
EP0291027A1 EP88107531A EP88107531A EP0291027A1 EP 0291027 A1 EP0291027 A1 EP 0291027A1 EP 88107531 A EP88107531 A EP 88107531A EP 88107531 A EP88107531 A EP 88107531A EP 0291027 A1 EP0291027 A1 EP 0291027A1
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EP
European Patent Office
Prior art keywords
clearing
control
folding
clearing device
hub
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88107531A
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German (de)
French (fr)
Other versions
EP0291027B1 (en
Inventor
Karlheinz Dr.-Ing. Bauer
Maximilian Ing-Grad. Arzberger
Johann Ing. Grad Haberer
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Bauer Spezialtiefbau GmbH
Original Assignee
Bauer Spezialtiefbau GmbH
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Publication date
Application filed by Bauer Spezialtiefbau GmbH filed Critical Bauer Spezialtiefbau GmbH
Priority to AT88107531T priority Critical patent/ATE68030T1/en
Publication of EP0291027A1 publication Critical patent/EP0291027A1/en
Application granted granted Critical
Publication of EP0291027B1 publication Critical patent/EP0291027B1/en
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Expired - Lifetime legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2808—Teeth
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/20—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels
    • E02F3/205—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels with a pair of digging wheels, e.g. slotting machines

Definitions

  • the invention relates to a clearing device with a clearing wheel, with a bearing plate extending into the region of the outer periphery of the clearing wheel hub and with folding teeth which are pivotally articulated distributed over the circumference on the edge of the clearing wheel hub facing the end plate.
  • the teeth in such broaching devices protrude in the radial direction and often form a plurality of toothed rings arranged at a distance from the hub in the axial direction of the milling wheel.
  • the erosion and loosening of mountains and soil takes place in that the clearing wheels are moved transversely to their axis, the soil being milled off in a region corresponding to the width of the clearing wheel to form a trench or slot.
  • These devices can therefore also be referred to as trench cutters.
  • folding teeth are arranged along the adjacent edge of the clearing wheel hub, which should engage in the unfolded position in the soil in front of the clearing plate.
  • the fact that the folding teeth can only dodge in a predetermined direction can be achieved that they are automatically pivoted into their working position during the advancement of the clearing wheel due to the earth pressure.
  • the invention has for its object to provide a broaching device of the type mentioned, in which evasion of the folding teeth is prevented.
  • folding teeth are designed with two arms with a rear control arm and an outwardly directed milling tooth, and in that there is a wedge gear between the control arm of each folding tooth and the end shield in order to forcibly bring the folding teeth into the pivoted-out position .
  • the invention therefore makes use of the idea of applying and deflecting the folding teeth independently of the back pressure of the soil by means of a positive positive control.
  • the invention therefore has the advantage that an optimal feed can be achieved since the soil or mountains in front of the end shield is safely cleared away.
  • the wedge gear enables a smooth guidance of the folding teeth, whereby the course of the folding tooth deflection can be determined by the incline of the wedge surfaces. In other words, this fact could also be referred to as cam control.
  • the wedge gear comprises a circumferential first wedge surface on the control arm and a control bar arranged along a circular sector, coaxial with the clearing wheel on the end shield, which engages with the wedge surface when the associated folding tooth is at a Rotary movement of the clearing wheel is moved past the control bar where the length of the control bar determines the duration of the deflection.
  • control arm can also be advantageous for the control arm to be provided with a wedge surface that runs in and out in the circumferential direction.
  • wedge gear has a wedge surface which extends radially on the control arm and a control strip arranged on the end shield for engagement with the wedge surface, and that the control strip is arranged on a track with a different radius, so that it is at one Circular movement of the folding tooth or the clearing wheel is guided along the wedge surface in the radial direction.
  • control arm is arranged at an angle to the milling tooth.
  • control arm is guided through an opening in the hub into the interior of the hub and is in engagement with the control strip on the end face of the hub.
  • the edge of the hub opening is particularly expedient to provide the edge of the hub opening as a rear stop for the control arm.
  • This stop which must absorb the feed pressure acting on the milling tooth, can be provided in the simplest way without additional precautions.
  • the arrangement is particularly robust due to the basically stable design of the hub.
  • Protection against penetrating soil is achieved in that the bearings of the folding teeth and the area between the hub edge and the end shield are protected with a cover.
  • the cover consists of strips which are arranged over the entire circumference of the hubs.
  • Fig. 1 shows schematically a trench cutter with two pairs of similar rotating pairs of clearing wheels 2,3 and 23,24 on a bearing plate 1, as illustrated in Fig. 2.
  • the bearing plate 1 is suspended from a swivel arm 26 of a conventional crane 27.
  • the bearing plate 1 can by an inclination of the pivot arm 26 in hori zontal direction and by means of a cable suspension 28 in the vertical direction.
  • the trench wall cutter is driven by means of a conventional hydraulic system, which is part of the crane 27.
  • a trench is produced by the clearing wheels 2, 3, 23, 24 cutting or breaking the earth or the rock and transporting it to the center, where, in a conventional manner, suction is carried out with supporting liquid which is provided and suctioned off via hose lines 25.
  • the support fluid and the soil are separated in a regeneration system (not shown). Then the support fluid is pumped back and is available again in the slot.
  • FIG. 2 illustrates one of the two pairs of clearing wheels 2, 3 which are rotatably arranged on the end shield 1.
  • the figure shows the clearing wheels 2, 3 in a view transverse to the axis of rotation of the clearing wheels 2, 3.
  • the clearing device is moved in the direction of arrow 5 while rotating the clearing wheels 2, 3.
  • clearing teeth 6, which protrude radially from the hubs 4 of the two clearing wheels 2, 3 and are distributed over the entire hub surface, engage in the ground to form a trench (not shown).
  • the clearing teeth 6 are designed as folding teeth 7, which are controlled with a positive control shown in FIG. 3 in such a way that they assume their pivoted-down position in front of and below the bearing plate.
  • the folding teeth 7 act on the soil lying between the two clearing wheels 2, 3 and prevent soil from standing in front of the end shield.
  • FIG. 2 illustrates in a cross section the control of the folding teeth 7 on the basis of a section which is designated III in FIG. 2.
  • the folding tooth 7 shown here is held with a pivot axis 8 in a bearing eye 9 arranged on the hub 4.
  • the pivot axis 8 is located laterally next to the longitudinal axis of the folding tooth 7.
  • the folding tooth 7 is formed with two arms, one arm by a milling tooth 10 projecting freely outwards and the other arm, which is referred to below as control arm 11, by a rear arm , Extension of the milling tooth 10 extending beyond the pivot axis 8 is formed.
  • the control arm 11 is guided through an opening 12 into the interior of the hub 4.
  • An edge 20 of the opening 12 serves as a rear stop, by which the maximum inclination of the folding tooth 7 is determined, which is illustrated in FIG. 2.
  • the storage of the folding tooth 7 and the opening 12 are protected from the outside by a housing 21 against penetrating soil. It consists of a first bar 13 arranged on the hub between the hub edge and the control arm 11, in particular for covering the opening 12, and of a second bar 14 with an L-shaped cross section, which is essentially in the radial direction between the hub 4 and the Pivot axis 8 extends to prevent soil from penetrating into the bearing eye 9.
  • the control arm 11 is acted upon from the front side of the clearing wheel 2 by a control bar 15 arranged on the end shield 1, which extends along a circular sector. Due to a beveled inlet and outlet, which are not visible in the figure due to the selected form of representation, a wedge gear is formed together with a counter surface 16 on the control arm 11, which causes the folding tooth 7 to pivot away as soon as the counter surface 16 rotates the hub 4 comes into contact with the control bar 15. As long as the counter surface 16 slides along the control bar, this deflection is maintained. A predetermined pivoting movement of the folding tooth 7 can also be achieved by a cam-like course of the control bar 15. Instead of the inlet and outlet at the wheel bar 15, it can also be appropriate to provide the counter surface 16 with a wedge surface that runs in and out in the circumferential direction of the hub 4 in order to achieve a gradual transition between the two end positions of the folding tooth 7.
  • Fig. 3 illustrates a position of the folding tooth 7, in which it has its maximum inclination, in which the folding tooth 7 is brought by external pressure on the milling tooth 10, for example by the pressure of the soil. From the space between the control bar 15 and the counter surface 16 it can be seen that in the example shown here, the control bar 15 is only used to initiate and maintain a minimum slope and that a further slope due to external pressure depending on the location of the edge 20 also is possible.
  • the control arm 11 also has a region 22 which lies opposite the free end of the first line 13.
  • the area 22 is shaped in the radial direction in such a way that, with each position of the folding tooth 7, the distance 17, which represents the minimum possible distance between the area 22 and the free end of the first strip 13, without touching it, essentially is kept constant to ensure that the opening 12 is covered. This is achieved by an eccentric arrangement of the folding tooth 7 on the pivot axis 8 by means of a bearing sleeve 18. If the folding tooth 7 is rotated clockwise, for example, from the position shown, it also performs a tangential movement due to its eccentric arrangement, so that the area 22 below the free end of the first bar 13 is moved.
  • Fig. 4 shows that the control bar 15 occupies a semicircle at the lower end of the end shield.
  • the semicircle is coaxial to the axis (not shown) of the clearing wheel, which is not visible in this illustration, and perpendicular to the character plane is mounted in the circular opening 19 in the bearing plate 1. If one assumes a clockwise rotation of the relevant clearing wheel, the mating surfaces 16 of the folding teeth 7 come into engagement in their horizontal position with a wedge-like inlet area 22 of the control bar 15 in order to bring about a gradual transition between their straight outward position and the folded-down position. While the folding teeth pass the semicircle formed by the control bar 15, they are held in this position. The pivoted-down position is maintained until a tapering outlet area 29 of the control bar 15 is reached.
  • the folding teeth 7 are brought into their straight, pivoted-back position when the free ends of the clearing teeth 6 come into engagement with a sliding surface 31 which has a further, beveled wedge-like inlet area 30 and a further beveled outlet area 32.
  • the wedge surface 31 is arranged coaxially to the axis of the clearing wheels. Since it interacts with the free ends of the clearing teeth 6, their radius is larger than the radius of the control bar 15.
  • the sliding surface 31 runs on the surface of the end shield 1 from its front end to its rear end in the region of the circular path traversed by the ends of the clearing teeth .
  • the counter surface 16 of the folding tooth 7 may also be appropriate to provide the counter surface 16 of the folding tooth 7 with a circumferential direction of the hub 4 of the wedge surface entering and exiting, in order to ensure a gradual transition between the two end positions of the folding tooth to reach.

Abstract

A trench cutter has cutting wheels with radially projecting cutting teeth and is arranged on a bearing bracket. Along the bearing bracket, hinged teeth are arranged on one edge of the cutting wheel hub. The hinged teeth have two arms, one arm serving as a control arm, which engages with a control ledge arranged on the bearing bracket, and the other arm serving as cutting tooth. The control ledge and the control arm form a wedge gear which forces the hinged teeth into a swing-out position in front of the free end of the bearing bracket.

Description

Die Erfindung betrifft eine Räumvorrichtung mit einem Räumrad, mit einem bis in den Bereich des Außenumfan­ges der Räumradnabe reichenden Lagerschild und mit Klappzähnen, die auf dem dem Lagerschild zugewandten Rand der Räumradnabe über den Umfang verteilt schwenk­bar angelenkt sind.The invention relates to a clearing device with a clearing wheel, with a bearing plate extending into the region of the outer periphery of the clearing wheel hub and with folding teeth which are pivotally articulated distributed over the circumference on the edge of the clearing wheel hub facing the end plate.

Die Zähne bei derartigen Räumvorrichtungen stehen in radialer Richtung ab und bilden häufig mehrere in axialer Richtung des Fräsrades im Abstand zur Nabe an­geordnete Zahnkränze. Die Abtragung und Lockerung von Gebirge und Erdreich erfolgt dadurch, daß die Räumräder quer zu ihrer Achse bewegt werden, wobei das Erdreich in einem der Breite des Räumrades entsprechenden Bereich unter Bildung eines Grabens oder Schlitzes abgefräst wird. Diese Geräte können daher auch als Schlitzwandfräse be­zeichnet werden.The teeth in such broaching devices protrude in the radial direction and often form a plurality of toothed rings arranged at a distance from the hub in the axial direction of the milling wheel. The erosion and loosening of mountains and soil takes place in that the clearing wheels are moved transversely to their axis, the soil being milled off in a region corresponding to the width of the clearing wheel to form a trench or slot. These devices can therefore also be referred to as trench cutters.

Um zu bewirken, daß auch der vor bzw. unter dem Lager­schild befindliche Raum bearbeitet wird, sind entlang des benachbarten Randes der Räumradnabe Klappzähne angeordnet, die in ausgeklappter Stellung in das vor dem Räumschild befindliche Erdreich eingreifen sollen. Dadurch, daß die Klappzähne nur in einer vorgegebenen Richtung ausweichen können, kann erreicht werden, daß sie während des Vorschubs des Räumrades aufgrund des Erddruckes selbsttätig in ihre Arbeitsstellung geschwenkt werden. Obwohl eine derartige Anordnung in den meisten Fällen zuverlässig arbeitet, kann es bei bestimmten Eigenschaften des Erdreichs vorkommen, daß die Schwenkbewegung nicht in der erforderlichen gewünschten Weise erfolgt.In order to ensure that the space in front of or below the end shield is also worked, folding teeth are arranged along the adjacent edge of the clearing wheel hub, which should engage in the unfolded position in the soil in front of the clearing plate. The fact that the folding teeth can only dodge in a predetermined direction can be achieved that they are automatically pivoted into their working position during the advancement of the clearing wheel due to the earth pressure. Although such an arrangement works reliably in most cases, certain properties of the soil may result in the pivoting movement is not carried out in the required manner.

Der Erfindung liegt die Aufgabe zugrunde, eine Räumvor­richtung der eingangs genannten Art anzugeben, bei wel­cher ein Ausweichen der Klappzähne verhindert wird.The invention has for its object to provide a broaching device of the type mentioned, in which evasion of the folding teeth is prevented.

Diese Aufgabe wird dadurch gelöst, daß die Klappzähne zwei­armig mit einem rückwärtigen Steuerarm und einem nach außen gerichteten Fräszahn ausgebildet sind, und daß jeweils ein Keilgetriebe zwischen dem Steuerarm eines jeden Klappzahnes und dem Lagerschild vorhanden ist, um die Klappzähne zwangs­weise in die ausgeschwenkte Stellung zu bringen.This object is achieved in that the folding teeth are designed with two arms with a rear control arm and an outwardly directed milling tooth, and in that there is a wedge gear between the control arm of each folding tooth and the end shield in order to forcibly bring the folding teeth into the pivoted-out position .

Die Erfindung macht sich also den Gedanken zunutze, durch eine formschlüssige Zwangssteuerung eine vom Gegendruck des Erdreiches unabhängige Beaufschlagung und Auslenkung der Klappzähne zu erreichen. Die Er­findung hat daher den Vorteil, daß ein optimaler Vor­schub erreicht werden kann, da das Erdreich oder Ge­birge vor dem Lagerschild sicher weggeräumt wird. Das Keilgetriebe ermöglicht dabei eine stoßfreie Führung der Klappzähne, wobei der Verlauf der Klappzahnauslen­kung durch die Steigung der Keilflächen festgelegt wer­den kann. Anders ausgedrückt könnte dieser Sachverhalt auch als Nockensteuerung bezeichnet werden.The invention therefore makes use of the idea of applying and deflecting the folding teeth independently of the back pressure of the soil by means of a positive positive control. The invention therefore has the advantage that an optimal feed can be achieved since the soil or mountains in front of the end shield is safely cleared away. The wedge gear enables a smooth guidance of the folding teeth, whereby the course of the folding tooth deflection can be determined by the incline of the wedge surfaces. In other words, this fact could also be referred to as cam control.

Eine bevorzugte Ausgestaltung der Erfindung besteht darin, daß das Keilgetriebe eine in Umfangsrichtung verlaufende erste Keilfläche auf dem Steuerarm und eine entlang eines Kreissektors, koaxial zum Räum­rad auf dem Lagerschild angeordnete Steuerleiste um­faßt, die mit der Keilfläche in Eingriff steht, wenn der zugehörige Klappzahn bei einer Drehbewegung des Räumrades an der Steuerleiste vorbeibewegt wird, wo­ bei die Länge der Steuerleiste die Dauer der Auslen­kung bestimmt.A preferred embodiment of the invention is that the wedge gear comprises a circumferential first wedge surface on the control arm and a control bar arranged along a circular sector, coaxial with the clearing wheel on the end shield, which engages with the wedge surface when the associated folding tooth is at a Rotary movement of the clearing wheel is moved past the control bar where the length of the control bar determines the duration of the deflection.

Es kann auch vorteilhaft sein, daß der Steuerarm mit einer in Umfangsrichtung einlaufenden und einer aus­laufenden Keilfläche versehen ist. Somit wird sowohl beim Ausschwenken als auch beim Einschwenken verhin­dert, daß durch schlagartige Bewegungen die Lager der Klappzähne belastet werden.It can also be advantageous for the control arm to be provided with a wedge surface that runs in and out in the circumferential direction. Thus, both when swiveling out and when swiveling in, the bearings of the folding teeth are stressed by sudden movements.

Es kann auch vorteilhaft sein, einen nockenartigen Ver­lauf zur Auslenkung der Klappzähne vorzusehen.It can also be advantageous to provide a cam-like course for deflecting the folding teeth.

Eine alternative Ausgestaltung des Keilgetriebes be­steht darin, daß das Keilgetriebe eine auf den Steuer­arm radial verlaufende Keilfläche und eine auf dem Lagerschild angeordnete Steuerleiste zum Eingriff mit der Keilfläche aufweist, und daß die Steuerleiste auf einer Bahn mit wechseldem Radius angeordnet ist, so daß sie bei einer Kreisbewegung des Klappzahnes bzw. des Räumrades in radialer Richtung auf der Keilfläche entlanggeführt wird.An alternative embodiment of the wedge gear is that the wedge gear has a wedge surface which extends radially on the control arm and a control strip arranged on the end shield for engagement with the wedge surface, and that the control strip is arranged on a track with a different radius, so that it is at one Circular movement of the folding tooth or the clearing wheel is guided along the wedge surface in the radial direction.

Es kann sich zum Ausgleich des Abstandes zwischen den Klappzähnen und dem Lagerschild als vorteilhaft er­weisen, daß der Steuerarm abgewinkelt zum Fräszahn angeordnet ist.To compensate for the distance between the folding teeth and the end shield, it may prove advantageous that the control arm is arranged at an angle to the milling tooth.

Eine andere bevorzugte Weiterbildung der Erfindung be­steht darin, daß der Steuerarm durch eine Öffnung in der Nabe in das Nabeninnere geführt ist und an der Stirnfläche der Nabe mit der Steuerleiste in Eingriff steht. Diese Maßnahme gestattet es, den Steuerarm relativ lang auszubilden, so daß die Hebelwirkung auf den Fräszahn verstärkt wird, wobei das Schwenklager den­noch möglichst nahe an der Nabe angeordnet sein kann.Another preferred development of the invention is that the control arm is guided through an opening in the hub into the interior of the hub and is in engagement with the control strip on the end face of the hub. This measure makes it possible to make the control arm relatively long, so that the leverage on the milling tooth is increased, whereby the pivot bearing can nevertheless be arranged as close as possible to the hub.

Es ist besonders zweckmäßig, den Rand des Nabendurchbruchs als rückwärtigen Anschlag für den Steuerarm vorzusehen. Dieser Anschlag, welcher den auf den Fräszahn einwirkenden Vorschubdruck aufnehmen muß, kann hierbei auf einfachste Weise ohne zusätzliche Vorkehrungen bereitgestellt werden. Außerdem ist die Anordnung aufgrund der grundsätzlich sta­bilen Ausbildung der Nabe besonders robust.It is particularly expedient to provide the edge of the hub opening as a rear stop for the control arm. This stop, which must absorb the feed pressure acting on the milling tooth, can be provided in the simplest way without additional precautions. In addition, the arrangement is particularly robust due to the basically stable design of the hub.

Ein Schutz gegen eindringendes Erdreich wird dadurch er­reicht, daß die Lager der Klappzähne und der Bereich zwi­schen Nabenrand und Lagerschild mit einer Abdeckung ge­schützt ist.Protection against penetrating soil is achieved in that the bearings of the folding teeth and the area between the hub edge and the end shield are protected with a cover.

Dies kann besonders wirkungsvoll dadurch erfolgen, daß die Abdeckung aus Leisten besteht, die über den gesamten Umfang der Naben angeordnet sind.This can be done particularly effectively in that the cover consists of strips which are arranged over the entire circumference of the hubs.

Nachfolgend wird die Erfindung anhand eines Ausführungsbei­spiels weiter beschrieben:

  • Fig. 1 zeigt schematisch eine Schlitzwandfräse,
  • Fig. 2 zeigt schematisch ein Paar Räumräder auf einem La­gerschild der Schlitzwandfräse gemäß Fig. 1;
  • Fig. 3 zeigt einen Schnitt durch einen Klappzahn der Räum­räder in einem Bereich III der Fig. 2
  • Fig. 4 zeigt schematisch eine Teilseitenansicht des Lager­schilds der Schlitzwandfräse in Richtung Pfeil IV der Fig. 2 und 3.
The invention is further described below using an exemplary embodiment:
  • 1 shows schematically a trench cutter,
  • Fig. 2 shows schematically a pair of clearing wheels on a bearing plate of the trench cutter according to Fig. 1;
  • FIG. 3 shows a section through a folding tooth of the clearing wheels in an area III of FIG. 2
  • 4 schematically shows a partial side view of the end shield of the trench cutter in the direction of arrow IV in FIGS. 2 and 3.

Fig. 1 zeigt schematisch eine Schlitzwandfräse mit zwei ge­gensinnig rotierenden gleichartigen Paaren von Räumrädern 2,3 bzw. 23,24 auf einem Lagerschild 1, wie in Fig. 2 näher veranschaulicht ist. Der Lagerschild 1 ist an einem Schwenk­arm 26 eines herkömmlichen Krans 27 aufgehängt. Der Lager­schild 1 kann durch eine Neigung des Schwenkarms 26 in hori­ zontaler Richtung und mittels einer Seilaufhängung 28 in vertikaler Richtung bewegt werden. Die Schlitzwandfräse wird mit Hilfe eines herkömmlichen Hydrauliksystems ange­trieben, welches Bestandteil des Krans 27 ist.Fig. 1 shows schematically a trench cutter with two pairs of similar rotating pairs of clearing wheels 2,3 and 23,24 on a bearing plate 1, as illustrated in Fig. 2. The bearing plate 1 is suspended from a swivel arm 26 of a conventional crane 27. The bearing plate 1 can by an inclination of the pivot arm 26 in hori zontal direction and by means of a cable suspension 28 in the vertical direction. The trench wall cutter is driven by means of a conventional hydraulic system, which is part of the crane 27.

Ein Graben wird dadurch hergestellt, daß die Räumräder 2,3, 23,24 die Erde oder das Gestein schneiden oder brechen und zur Mitte transportieren, wo auf herkömmliche Weise ein Ab­saugen mit Stützflüssigkeit erfolgt, die über Schlauchlei­tungen 25 bereitgestellt und abgesaugt wird. Die Stützflüs­sigkeit und der Boden werden in einer Regenerierungsanlage (nicht dargestellt) getrennt. Dann wird die Stützflüssigkeit zurückgepumpt und steht wieder im Schlitz zur Verfügung.A trench is produced by the clearing wheels 2, 3, 23, 24 cutting or breaking the earth or the rock and transporting it to the center, where, in a conventional manner, suction is carried out with supporting liquid which is provided and suctioned off via hose lines 25. The support fluid and the soil are separated in a regeneration system (not shown). Then the support fluid is pumped back and is available again in the slot.

Die Fig. 2 veranschaulicht eines der beiden Paare von Räum­rädern 2,3, die am Lagerschild 1 drehbar angeordnet sind. Die Figur zeigt die Räumräder 2,3 in einer Ansicht quer zur Drehachse der Räumräder 2,3. Im Betrieb wird die Räumvor­richtung unter Drehung der Räumräder 2,3 in Pfeilrichtung 5 bewegt. Dabei greifen Räumzähne 6, die von den Naben 4 der beiden Räumräder 2,3 radial abstehen und über die gesamte Nabenoberfläche verteilt sind, in das Erdreich unter Bildung eines Grabens (nicht dargestellt) ein.2 illustrates one of the two pairs of clearing wheels 2, 3 which are rotatably arranged on the end shield 1. The figure shows the clearing wheels 2, 3 in a view transverse to the axis of rotation of the clearing wheels 2, 3. In operation, the clearing device is moved in the direction of arrow 5 while rotating the clearing wheels 2, 3. In this case, clearing teeth 6, which protrude radially from the hubs 4 of the two clearing wheels 2, 3 and are distributed over the entire hub surface, engage in the ground to form a trench (not shown).

Auf den dem Lagerschild 1 benachbarten Rändern der beiden Naben 4 sind die Räumzähne 6 als Klappzähne 7 ausgebildet, die mit einer in Fig. 3 gezeigten Zwangssteuerung in der Weise angesteuert sind, daß sie vor und unterhalb des Lager­schildes ihre abgeschwenkte Stellung einnehmen. Hierbei be­aufschlagen die Klappzähne 7 das zwischen den beiden Räum­rädern 2,3 liegende Erdreich und verhindern, daß vor dem Lagerschild Erdreich stehen bleibt.On the edges of the two hubs 4 adjacent to the bearing plate 1, the clearing teeth 6 are designed as folding teeth 7, which are controlled with a positive control shown in FIG. 3 in such a way that they assume their pivoted-down position in front of and below the bearing plate. Here, the folding teeth 7 act on the soil lying between the two clearing wheels 2, 3 and prevent soil from standing in front of the end shield.

Fig. 2 veranschaulicht in einem Querschnitt die Steuerung der Klappzähne 7 anhand eines Ausschnitts, der in Fig. 2 MitIII bezeichnet ist. Der hierbei dargestellte Klappzahn 7 ist mit einer Schwenkachse 8 in einem auf der Nabe 4 ange­ordneten Lagerauge 9 gehalten. Die Schwenkachse 8 be­findet sich dabei seitlich neben der Längsachse des Klapp­zahns 7. Ferner ist der Klappzahn 7 zweiarmig ausgebildet, wobei der eine Arm durch einen nach außen frei abstehenden Fräszahn 10 und der andere Arm, der nachfolgend als Steuer­arm 11 bezeichnet wird, durch eine rückwärtige, über die Schwenkachse 8 hinausreichende Verlängerung des Fräszahns 10 gebildet wird. Der Steuerarm 11 ist durch einen Durch­bruch 12 bis ins Innere der Nabe 4 geführt. Ein Rand 20 des Durchbruchs 12 dient dabei als rückwärtiger Anschlag, durch welchen die maximale Neigung des Klappzahns 7 bestimmt wird, die in der Fig. 2 veranschaulicht ist. Der Lagerung des Klappzahns 7 sowie der Durchbruch 12 sind nach außen über ein Gehäuse 21 gegen eindringendes Erdreich geschützt. Es besteht aus einer auf der Nabe angeordneten ersten Leiste 13 zwischen dem Nabenrand und dem Steuerarm 11, insbesondere zur Abdeckung des Durchbruchs 12, und aus einer zweiten Lei­ste 14 mit L-förmigem Querschnitt, die im wesentlichen in radialer Richtung zwischen der Nabe 4 und der Schwenkachse 8 verläuft, um zu verhindern, daß Erdreich in das Lagerauge 9 eindringt.FIG. 2 illustrates in a cross section the control of the folding teeth 7 on the basis of a section which is designated III in FIG. 2. The folding tooth 7 shown here is held with a pivot axis 8 in a bearing eye 9 arranged on the hub 4. The pivot axis 8 is located laterally next to the longitudinal axis of the folding tooth 7. Furthermore, the folding tooth 7 is formed with two arms, one arm by a milling tooth 10 projecting freely outwards and the other arm, which is referred to below as control arm 11, by a rear arm , Extension of the milling tooth 10 extending beyond the pivot axis 8 is formed. The control arm 11 is guided through an opening 12 into the interior of the hub 4. An edge 20 of the opening 12 serves as a rear stop, by which the maximum inclination of the folding tooth 7 is determined, which is illustrated in FIG. 2. The storage of the folding tooth 7 and the opening 12 are protected from the outside by a housing 21 against penetrating soil. It consists of a first bar 13 arranged on the hub between the hub edge and the control arm 11, in particular for covering the opening 12, and of a second bar 14 with an L-shaped cross section, which is essentially in the radial direction between the hub 4 and the Pivot axis 8 extends to prevent soil from penetrating into the bearing eye 9.

Der Steuerarm 11 wird von der Stirnseite des Räumrades 2 her durch eine auf dem Lagerschild 1 angeordnete Steuerleiste 15 beaufschlagt, die entlang eines Kreissektors verläuft. Durch einen abgeschrägten Ein- und Auslauf, die aufgrund der ge­wählten Darstellungsform in der Figur nicht ersichtlich sind, wird zusammen mit einer Gegenfläche 16 am Steuerarm 11 ein Keilgetriebe gebildet, welches ein Abschwenken des Klapp­zahns 7 bewirkt, sobald die Gegenfläche 16 bei einer Drehung der Nabe 4 in Kontakt mit der Steuerleiste 15 gelangt. So­lange die Gegenfläche 16 auf der Steuerleiste entlang glei­tet, wird diese Auslenkung beibehalten. Durch einen nocken­artigen Verlauf der Steuerleiste 15 kann dabei ferner eine vorgegebene Schwenkbewegung des Klappzahns 7 erreicht wer­den. Anstelle des Einlaufs und des Auslaufs an der Steuer­ leiste 15 kann es auch angebracht sein, die Gegenfläche 16 mit einer in Umfangsrichtung der Nabe 4 ein- und auslau­fenden Keilfläche zu versehen, um einen allmählichen Über­gang zwischen den beiden Endstellungen des Klappzahns 7 zu erreichen.The control arm 11 is acted upon from the front side of the clearing wheel 2 by a control bar 15 arranged on the end shield 1, which extends along a circular sector. Due to a beveled inlet and outlet, which are not visible in the figure due to the selected form of representation, a wedge gear is formed together with a counter surface 16 on the control arm 11, which causes the folding tooth 7 to pivot away as soon as the counter surface 16 rotates the hub 4 comes into contact with the control bar 15. As long as the counter surface 16 slides along the control bar, this deflection is maintained. A predetermined pivoting movement of the folding tooth 7 can also be achieved by a cam-like course of the control bar 15. Instead of the inlet and outlet at the wheel bar 15, it can also be appropriate to provide the counter surface 16 with a wedge surface that runs in and out in the circumferential direction of the hub 4 in order to achieve a gradual transition between the two end positions of the folding tooth 7.

Fig. 3 veranschaulicht eine Stellung des Klappzahns 7, bei welcher er seine maximale Neigung aufweist, in die der Klapp­zahn 7 durch externen Druck auf den Fräszahn 10 gebracht ist, beispielsweise durch den Druck des Erdreichs. Aus dem Zwi­schenraum zwischen der Steuerleiste 15 und der Gegenfläche 16 wird ersichtlich, daß in dem hier dargestellten Beispiel die Steuerleiste 15 lediglich dazu dient, um eine Mindest­neigung einzuleiten und aufrechtzuerhalten und daß eine wei­tere Neigung aufgrund von externem Druck in Abhängigkeit vom Ort des Randes 20 auch möglich ist.Fig. 3 illustrates a position of the folding tooth 7, in which it has its maximum inclination, in which the folding tooth 7 is brought by external pressure on the milling tooth 10, for example by the pressure of the soil. From the space between the control bar 15 and the counter surface 16 it can be seen that in the example shown here, the control bar 15 is only used to initiate and maintain a minimum slope and that a further slope due to external pressure depending on the location of the edge 20 also is possible.

Der Steuerarm 11 weist ferner einen Bereich 22 auf, der dem freien Ende der ersten Leite 13 gegenüberliegt. Der Bereich 22 ist in radialer Richtung in der Weise geformt, daß bei jeder Lage des Klappzahns 7 der Abstand 17, welcher den mini­mal möglichen Abstand zwischen dem Bereich 22 und dem freien Ende der ersten Leiste 13 darstellt, ohne daß sich diese be­rühren, im wesentlichen konstant gehalten ist, um die Ab­deckung der Öffnung 12 sicherzustellen. Dies wird durch eine exzentrische Anordnung des Klappzahns 7 auf der Schwenkachse 8 mittels einer Lagerhülse 18 erreicht. Wenn der Klappzahn 7 beispielsweise im Uhrzeigersinn aus der dargestellten Posi­tion ausgedreht wird, so vollführt er aufgrund seiner exzen­trischen Anordnung auch eine Tangentialbewegung, so daß der Bereich 22 unterhalb des freien Endes der ersten Leiste 13 bewegt wird.The control arm 11 also has a region 22 which lies opposite the free end of the first line 13. The area 22 is shaped in the radial direction in such a way that, with each position of the folding tooth 7, the distance 17, which represents the minimum possible distance between the area 22 and the free end of the first strip 13, without touching it, essentially is kept constant to ensure that the opening 12 is covered. This is achieved by an eccentric arrangement of the folding tooth 7 on the pivot axis 8 by means of a bearing sleeve 18. If the folding tooth 7 is rotated clockwise, for example, from the position shown, it also performs a tangential movement due to its eccentric arrangement, so that the area 22 below the free end of the first bar 13 is moved.

Fig. 4 zeigt, daß die Steuerleiste 15 einen Halbkreis am un­teren Ende des Lagerschilds einnimmt. Der Halbkreis ist ko­axial zur Achse (nicht dargestellt) des in dieser Darstel­lung nicht sichtbaren Räumrades, die senkrecht zur Zeichen­ ebene in der kreisrunden Öffnung 19 im Lagerschild 1 ge­lagert ist. Wenn man eine Drehung des betreffenden Räumra­des im Uhrzeigersinn annimmt, gelangen die Gegenflächen 16 der Klappzähne 7 in ihrer horizontalen Stellung in Eingriff mit einem keilartigen Einlaufbereich 22 der Steuerleiste 15, um einen allmählichen Übergang zwischen ihrer gerade nach außen gerichteten Stellung und der abgeklappten Stellung herbeizuführen. Während die Klappzähne den von der Steuer­leiste 15 gebildeten Halbkreis passieren, werden sie in die­ser Stellung gehalten. Die abgeschwenkte Stellung wird so­lange beibehalten, bis ein sich verjüngender Auslaufbereich 29 der Steuerleiste 15 erreicht wird.Fig. 4 shows that the control bar 15 occupies a semicircle at the lower end of the end shield. The semicircle is coaxial to the axis (not shown) of the clearing wheel, which is not visible in this illustration, and perpendicular to the character plane is mounted in the circular opening 19 in the bearing plate 1. If one assumes a clockwise rotation of the relevant clearing wheel, the mating surfaces 16 of the folding teeth 7 come into engagement in their horizontal position with a wedge-like inlet area 22 of the control bar 15 in order to bring about a gradual transition between their straight outward position and the folded-down position. While the folding teeth pass the semicircle formed by the control bar 15, they are held in this position. The pivoted-down position is maintained until a tapering outlet area 29 of the control bar 15 is reached.

Die Klappzähne 7 werden in ihre gerade, zurückgeschwenkte Position gebracht, wenn die freien Enden der Räumzähne 6 mit einer Gleitfläche 31 in Eingriff gelangen, die einen weite­ren, angeschrägten keilartigen Einlaufbereich 30 und einen weiteren abgeschrägten Auslaufbereich 32 aufweist. Die Keil­fläche 31 ist koaxial zur Achse der Räumräder angeordnet. Da sie mit den freien Enden der Räumzähne 6 zusammenwirkt, ist ihr Radius größer als der Radius der Steuerleiste 15. Die Gleitfläche 31 verläuft auf der Oberfläche des Lager­schilds 1 von seinem vorderen Ende zu seinem rückwärtigen En­de im Bereich der von den Enden der Räumzähne durchlaufenen Kreisbahn.The folding teeth 7 are brought into their straight, pivoted-back position when the free ends of the clearing teeth 6 come into engagement with a sliding surface 31 which has a further, beveled wedge-like inlet area 30 and a further beveled outlet area 32. The wedge surface 31 is arranged coaxially to the axis of the clearing wheels. Since it interacts with the free ends of the clearing teeth 6, their radius is larger than the radius of the control bar 15. The sliding surface 31 runs on the surface of the end shield 1 from its front end to its rear end in the region of the circular path traversed by the ends of the clearing teeth .

Anstelle des Einlaufs 22 und des Auslaufs 29 der Steuerlei­ste 15 kann es auch angebracht sein, die Gegenfläche 16 des Klappzahns 7 mit einer in Umfangsrichtung der Nabe 4 der ein- und auslaufenden Keilfläche zu versehen, um einen allmähli­chen Übergang zwischen den beiden Endstellungen des Klapp­zahns zu erreichen.Instead of the inlet 22 and the outlet 29 of the control bar 15, it may also be appropriate to provide the counter surface 16 of the folding tooth 7 with a circumferential direction of the hub 4 of the wedge surface entering and exiting, in order to ensure a gradual transition between the two end positions of the folding tooth to reach.

Claims (11)

1. Räumvorrichtung mit einem Räumrad, mit einem bis in den Bereich des Außenumfanges der Räumradnabe rei­chenden Lagerschild und mit Klappzähnen, die auf dem dem Lagerschild zugewandten Rand der Räumradnabe über den Umfang verteilt schwenkbar angelenkt sind,
dadurch gekennzeichnet,
daß die Klappzähne (7) jeweils zweiarmig mit einem rückwärtigen Steuerarm (11) und einem nach außen ge­richteten Fräszahn (10) ausgebildet sind, und
daß jeweils ein Keilgetriebe zwischen dem Steuerarm (11) und dem Lagerschild (1) vorhanden ist, um die Klappzähne (7) zwangsweise in die ausgeschwenkte Stellung zu bringen.1. clearing device with a clearing wheel, with a bearing plate extending into the area of the outer circumference of the clearing wheel hub and with folding teeth which are pivotally articulated over the circumference on the edge of the clearing wheel hub facing the end plate,
characterized by
that the folding teeth (7) each have two arms with a rear control arm (11) and an outwardly directed milling tooth (10), and
that a wedge gear between the control arm (11) and the bearing plate (1) is present in order to forcibly bring the folding teeth (7) into the pivoted-out position. 2. Räumvorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß das Keilgetriebe mindestens eine in Umfangsrichtung verlaufende erste Keilfläche auf dem Steuerarm (11) und eine entlang eines Kreissektors, koaxial zum Räumrad (2,3) auf dem Lagerschild (1) angeordnete Steuerleiste (15) umfaßt, die mit der Keilfläche in Eingriff steht, wenn der zugehörige Klappzahn (7) bei einer Drehbewe­gung des Räumrades (2,3) an der Steuerleiste (15) vor­beibewegt wird, wobei die Länge der Steuerleiste die Dauer der Auslenkung bestimmt.2. clearing device according to claim 1,
characterized by
that the wedge gear comprises at least one circumferential first wedge surface on the control arm (11) and a control bar (15) arranged along a circle sector coaxial with the clearing wheel (2, 3) on the end plate (1), which engages with the wedge surface when the associated folding tooth (7) is moved past the control bar (15) during a rotary movement of the clearing wheel (2, 3), the length of the control bar determining the duration of the deflection. 3. Räumvorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß der Steuerarm (11) mit einer in Umfangsrichtung einlaufenden und einer auslaufenden Keilfläche ver­sehen ist.3. clearing device according to claim 1 or 2,
characterized by
that the control arm (11) is provided with a wedge surface entering and exiting in the circumferential direction. 4. Räumvorrichtung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß der Steuerarm (11) mit einer in Umfangsrichtung verlaufenden nockenartigen Fläche versehen ist.4. clearing device according to one of claims 1 to 3,
characterized by
that the control arm (11) is provided with a circumferential cam-like surface. 5. Räumvorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß das Keilgetriebe eine auf den Steuerarm (11) radial verlaufende Keilfläche und eine auf dem Lagerschild (1) angeordnete Steuerleiste zum Eingriff mit der Keil­fläche aufweist, und daß die Steuerleiste auf einer Bahn mit wechselndem Radius angeord­net ist, so daß sie bei einer Kreisbewegung des Klapp­zahnes (7) bzw. des Räumrades (2,3) in radialer Rich­tung auf der Keilfläche entlanggeführt wird.5. clearing device according to claim 1,
characterized by
that the wedge gear has a radially extending wedge surface on the control arm (11) and a control strip arranged on the end plate (1) for engagement with the wedge surface, and that the control strip is arranged on a track with an alternating radius, so that when the circular movement of the Folding tooth (7) or the clearing wheel (2, 3) is guided along the wedge surface in the radial direction. 6. Räumvorrichtung nach einem der Ansprüche 2 oder 3,
dadurch gekennzeichnet,
daß die Steuerleiste (15) einen nockenartigen Verlauf zur Auslenkung der Klappzähne (7) aufweist.6. clearing device according to one of claims 2 or 3,
characterized by
that the control bar (15) has a cam-like course for deflecting the folding teeth (7). 7. Räumvorrichtung nach Anspruch 6,
dadurch gekennzeichnet,
daß die Steuerleiste (15) einen wellenförmigen Ver­lauf aufweist.7. clearing device according to claim 6,
characterized by
that the control bar (15) has a wavy course. 8. Räumvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Steuerarm (11) abgewinkelt zum Fräszahn (10) angeordnet ist.8. clearing device according to one of the preceding claims,
characterized by
that the control arm (11) is arranged at an angle to the milling tooth (10). 9. Räumvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Steuerarm (11) durch einen Durchbruch (12) in der Nabe (4) in das Nabeninnere geführt ist, und an der Stirnfläche der Nabe (4) mit der Steuerleiste in Eingriff steht.9. clearing device according to one of the preceding claims,
characterized by
that the control arm (11) is guided through an opening (12) in the hub (4) into the interior of the hub, and is in engagement with the control strip on the end face of the hub (4). 10. Räumvorrichtung nach Anspruch 9,
dadurch gekennzeichnet,
daß ein Rand (20) des Durchbruchs (12) als rückwärti­ger Anschlag (13) des Klappzahnes (7) dient.10. clearing device according to claim 9,
characterized by
that an edge (20) of the opening (12) serves as a rear stop (13) of the folding tooth (7). 11. Räumvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Lager der Klappzähne (7) und der Bereich zwischen Nabenrand und Lagerschild (1) sowie der Durchbruch (12) mit einer Abdeckung gegen Eindrin­gen von Erdreich und Steinen geschützt ist.11. clearing device according to one of the preceding claims,
characterized by
that the bearing of the folding teeth (7) and the area between the hub edge and end shield (1) and the opening (12) is protected with a cover against the ingress of soil and stones.
EP88107531A 1987-05-13 1988-05-10 Removal device Expired - Lifetime EP0291027B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88107531T ATE68030T1 (en) 1987-05-13 1988-05-10 CLEARING DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873715977 DE3715977A1 (en) 1987-05-13 1987-05-13 ROOM DEVICE
DE3715977 1987-05-13

Publications (2)

Publication Number Publication Date
EP0291027A1 true EP0291027A1 (en) 1988-11-17
EP0291027B1 EP0291027B1 (en) 1991-10-02

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ID=6327453

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Country Status (6)

Country Link
US (1) US4834197A (en)
EP (1) EP0291027B1 (en)
JP (1) JPH0660501B2 (en)
AT (1) ATE68030T1 (en)
DE (2) DE3715977A1 (en)
ES (1) ES2026965T3 (en)

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US7278228B2 (en) 2003-12-23 2007-10-09 Bauer Maschinen Gmbh Hinged tooth
EP2623677A1 (en) * 2012-01-31 2013-08-07 Bauer Spezialtiefbau GmbH Assembly and method for manufacturing a slotted wall element
US8864422B2 (en) 2012-01-31 2014-10-21 Bauer Spezialtiefbau Gmbh Method and arrangement for producing a trench wall element

Also Published As

Publication number Publication date
JPS63308123A (en) 1988-12-15
US4834197A (en) 1989-05-30
DE3865235D1 (en) 1991-11-07
EP0291027B1 (en) 1991-10-02
ATE68030T1 (en) 1991-10-15
DE3715977A1 (en) 1988-12-01
DE3715977C2 (en) 1990-11-22
JPH0660501B2 (en) 1994-08-10
ES2026965T3 (en) 1992-05-16

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