EP1609572B1 - Cutting device such as wall groove milling tool provided with sealing means - Google Patents

Cutting device such as wall groove milling tool provided with sealing means Download PDF

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Publication number
EP1609572B1
EP1609572B1 EP05105492A EP05105492A EP1609572B1 EP 1609572 B1 EP1609572 B1 EP 1609572B1 EP 05105492 A EP05105492 A EP 05105492A EP 05105492 A EP05105492 A EP 05105492A EP 1609572 B1 EP1609572 B1 EP 1609572B1
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EP
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Prior art keywords
shaft
cutting device
cutting
closure element
cutting tool
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EP05105492A
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German (de)
French (fr)
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EP1609572A1 (en
Inventor
Thomas Blatz
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Hilti AG
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Hilti AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/045—Sawing grooves in walls; sawing stones from rocks; sawing machines movable on the stones to be cut
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
    • B24B55/052—Protective covers for the grinding wheel specially designed for portable grinding machines with rotating tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/18—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools
    • B28D1/183—Hand tools, e.g. portable, motor driven

Definitions

  • the present invention relates to a cutting device, such as a wall chaser, a circular saw or a separating cutter, the type mentioned in the preamble of claim 1.
  • Such cutters have at least one driven by a motor assembly, arranged on a shaft cutting tool which is shielded by a hood-shaped cover.
  • the cutting tool such.
  • the covering means for this purpose in at least one side wall on a slot-shaped passage for the shaft.
  • a high density of the cover is desirable.
  • the covering is designed as a fan cover, which consists of a guide shaft and a protective hood.
  • the protective hood can dive into the guide shaft, in which there is also a slot-shaped passage for the shaft.
  • the disadvantage here is that the gap between the guide shaft and protective hood is not air and dustproof and thus causes pressure losses when using a suction, which impairs the suction.
  • the object of the present invention is to develop a tool device of the aforementioned type, which avoids the disadvantages mentioned.
  • the sealing means have an eccentrically pivotable about the shaft closure element, which includes a control means for implementing a lowering movement of the shaft relative to the covering in a pivoting movement of the closure element.
  • the closure element is designed as an eccentric disc, which has an eccentrically arranged opening for the shaft.
  • control means comprise a circumferential annular surface of the eccentric disc, which can be guided on a mating surface lying in the region of the support plane. With a lowering of the shaft relative to the static surface lying in the region of the support plane, a pivoting of the closure means or the eccentric disc is thereby effected in a simple manner. It may further be provided a spring element, that the eccentric disc loaded in the direction of the counter surface and thus forces a guide of the annular surface on the counter surface even when lifting the shaft. A forced operation of the eccentric but z. B. also be made possible by a slotted guide.
  • the mating surface is formed on a web arranged on the covering device.
  • This web can also form at least a part of the support plane.
  • the slot-shaped passage extends arcuately or in a radius in a side wall of the cover.
  • the slot width of the implementation can be made so small that the shaft can be passed through the necessary tolerance just through this.
  • a particularly good sealing of the cover on the implementation is achieved when the closure element slidably bears against the, the slot-shaped implementation having side wall of the cover.
  • the cutter 10 shown in Figures 1 to 4 which is designed here as a wall chaser, has two arranged on a shaft 12 cutting tools 14, such. As diamond blades or saw blades, on.
  • the shaft 12 and thus the cutting tools 14 are drivable via a coupled to the shaft 12 engine assembly 13, which may optionally include a transmission device.
  • FIGS. 1 and 2 In the position of the cutting tools 14 shown in FIGS. 1 and 2, these are located almost completely in the interior of a hood-shaped covering device 20 designed as a protective hood.
  • a suction opening is provided on this covering device 30 (see Fig. 1) arranged, which is connectable to a suction device not shown here.
  • this forms a support plane 11, on which the cutting device 10 can be applied to a substrate U to be processed (compare FIGS. 3 and 4).
  • a slot-shaped passage 22 is arranged for the shaft 12, through which it is led out of the cover 20.
  • the motor assembly 13 with the shaft 12 and the cutting tools 14 is pivotally mounted (pivot bearing point not shown in the figures), so that the shaft 12 with the cutting tools 14 with respect to the support plane 11 and against the cover 20 is lowered (see arrow 40 in FIG Fig. 2).
  • a sealing means in the form of a closure means 23 is provided which is formed here as a circular eccentric disc.
  • the closure means 23 has an eccentrically arranged aperture 24, through which the shaft 12 is passed.
  • the closure means 23 abuts against the side wall 28 and covers the slot-shaped passage 22 sealingly.
  • an abutment nozzle 29 is disposed around the aperture 24 around which is rotatably received in a bearing neck 17.
  • control means 25 is arranged at the designed as a circular eccentric locking means 23 rarium designed as an annular surface 26 .
  • This control means 25 serves for the automatic pivoting of the closure means 23 when the cutting tools 14 are lowered with the shaft 12 with respect to the cover 20 and the support plane 11.
  • the control means 25 and the annular surface 26 bears against a mating surface 16 which is formed on a web 21 projecting perpendicularly from the side wall 28.
  • the shaft 12 with the cutting tools 14 relative to the cover 20 and the support plane 11 is lowered (see Figure 2, reference numeral 40), then performs the closure means 23 due to the guidance of the annular surface 26 on the Counter surface 16 and the shorter distance of the shaft 12 to the web 21 a pivoting movement 41.
  • the closure means 23 is pivoted almost 180 °, as can be seen in particular from Fig. 4.
  • the sealing of the bushing 22 was carried out during the pivoting movement 41 substantially completely. Is at the suction opening 30 a Dust extraction connected, so almost no negative pressure at the passage 22 is lost. Air can only be sucked in between the support plane and the ground U.
  • guide rollers 19 are provided, such. B. four guide rollers, each with a guide roller 19 at each corner of a substantially rectangular support plane 11.
  • the guide rollers 19 can thereby also the support plane 11 slightly spaced from the substrate U.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Sawing (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Sealing Material Composition (AREA)
  • Coating Apparatus (AREA)

Abstract

Cutting appliance (10) has cutting tool (14) situated on a motor-driven shaft (12), with a supporting plane (11) which can be placed on the underlying surface to be worked and against which the cutting tool can be lowered. It has a hub-shaped coating device (20) with a slit-shaped entrance hole (22) for the shaft, containing jointing solution to at least partly seal the slit-shaped hole. The solution has a closing part (23) moveable eccentrically around the shaft which contains a control device (25) to lower the shaft relative to the coating device in the hinged motion of the closing part.

Description

Die vorliegende Erfindung betrifft ein Schneidgerät, wie eine Mauernutfräse, eine Kreissäge oder einen Trennschneider, der im Oberbegriff von Patentanspruch 1 genannten Art.The present invention relates to a cutting device, such as a wall chaser, a circular saw or a separating cutter, the type mentioned in the preamble of claim 1.

Derartige Schneidgeräte, weisen wenigstens ein über eine Motoranordnung antreibbares, an einer Welle angeordnetes Schneidwerkzeug auf, das über eine haubenförmige Abdeckeinrichtung abgeschirmt ist. Bei einem Säge- oder Schneidevorgang mit dem Schneidgerät kann das Schneidewerkzeug, wie z. B. das Sägeblatt, in den zu bearbeitenden Untergrund eintauchen, wozu das Schneidwerkzeug gegenüber der Abdeckeinrichtung und der Stützebene des Schneidgerätes absenkbar ist. Um die Absenkung der Welle zu ermöglichen, weist die Abdeckeinrichtung dazu in wenigstens einer Seitenwand eine schlitzförmige Durchführung für die Welle auf. Insbesondere bei handgeführten Schneidgeräten, bei denen eine Staubabsaugung aus der Abdeckeinrichtung vorgesehen ist, ist eine hohe Dichtigkeit der Abdeckeinrichtung wünschenswert.Such cutters have at least one driven by a motor assembly, arranged on a shaft cutting tool which is shielded by a hood-shaped cover. In a sawing or cutting process with the cutter, the cutting tool, such. As the saw blade, immerse in the substrate to be processed, for which purpose the cutting tool against the cover and the support plane of the cutter is lowered. In order to allow the lowering of the shaft, the covering means for this purpose in at least one side wall on a slot-shaped passage for the shaft. In particular, in hand-held cutting devices in which a dust extraction is provided from the cover, a high density of the cover is desirable.

Aus der DE 85 34 802 U1 ist ein derartiges Schneidgerät bekannt, bei dem die Durchführung an der haubenförmigen Abdeckeinrichtung über Bürsten gegenüber der Welle angedichtet ist.From the DE 85 34 802 U1 Such a cutting device is known in which the implementation of the dome-shaped covering means is written on the shaft via brushes.

Von Nachteil hierbei ist, dass ein derartiger Bürstenvorhang zum einen nicht luft- und staubdicht ist und zum anderen einem starken Verschleiss unterliegt.The disadvantage of this is that such a brush curtain on the one hand is not air and dustproof and on the other is subject to heavy wear.

Aus der DE 201 00 307 U1 ist ein weiteres Schneidgerät bekannt, bei dem die Abdeckeinrichtung als Fächerhaube ausgebildet ist, die aus einem Führungsschacht und einer Schutzhaube besteht. Die Schutzhaube kann dabei in den Führungsschacht eintauchen, in dem sich auch eine schlitzförmige Durchführung für die Welle befindet.From the DE 201 00 307 U1 is another cutting device is known in which the covering is designed as a fan cover, which consists of a guide shaft and a protective hood. The protective hood can dive into the guide shaft, in which there is also a slot-shaped passage for the shaft.

Von Nachteil hierbei ist, dass der Spalt zwischen Führungsschacht und Schutzhaube nicht luft- und staubdicht ist und so bei Verwendung einer Absaugeinrichtung Druckverluste verursacht, die die Absaugleistung beeinträchtigt.The disadvantage here is that the gap between the guide shaft and protective hood is not air and dustproof and thus causes pressure losses when using a suction, which impairs the suction.

Die Aufgabe der vorliegenden Erfindung liegt darin, eine Werkzeugvorrichtung der vorgenannten Art zu entwickeln, die die genannten Nachteile vermeidet.The object of the present invention is to develop a tool device of the aforementioned type, which avoids the disadvantages mentioned.

Diese Aufgabe wird erfindungsgemäss durch die in Anspruch 1 genannten Massnahmen erreicht. Demnach weisen die Dichtmittel ein exzentrisch um die Welle herum verschwenkbares Verschlusselement auf, welches ein Steuermittel zur Umsetzung einer Absenkbewegung der Welle relativ zur Abdeckeinrichtung in eine Verschwenkbewegung des Verschlusselementes beinhaltet.This object is achieved according to the invention by the measures mentioned in claim 1. Accordingly, the sealing means have an eccentrically pivotable about the shaft closure element, which includes a control means for implementing a lowering movement of the shaft relative to the covering in a pivoting movement of the closure element.

Durch ein derartiges, exzentrisch an der Welle angeordnetes und sich bei einer Absenkbewegung in seiner Verschlusslage automatisch verstellbares Verschlusselement wird eine hohe Dichtigkeit an der schlitzförmigen Durchführung gewährleistet. Diese Dichtigkeit an der Durchführung ist bei Schneidgeräten mit angeschlossener Staubabsaugung von Vorteil, da ein ausreichender Saugdruck gewährleistet wird. Sie ist aber auch bei nicht vorhandener Staubabsaugung von Vorteil, da kein Schneid- oder Sägestaub durch die Durchführung nach aussen ziehen kann.By such, eccentrically arranged on the shaft and in a lowering movement in its closed position automatically adjustable closure element a high tightness is ensured at the slot-shaped implementation. This tightness at the implementation is advantageous in cutters with attached dust extraction, as a sufficient suction pressure is ensured. But it is also in absence of dust extraction advantageous because no cutting or Sägestaub can pull through the implementation to the outside.

In einer konstruktiv einfachen Lösung ist das Verschlusselement als Excenterscheibe ausgebildet, die einen exzentrisch angeordneten Durchbruch für die Welle aufweist.In a structurally simple solution, the closure element is designed as an eccentric disc, which has an eccentrically arranged opening for the shaft.

Vorteilhaft beinhalten die Steuermittel eine umfängliche Ringfläche der Excenterscheibe, die auf einer im Bereich der Stützebene liegenden Gegenfläche führbar ist. Bei einer Absenkung der Welle gegenüber der statisch im Bereich der Stützebene liegenden Gegenfläche wird dadurch in einfacher Weise ein Verschwenken des Verschlussmittels bzw. der Excenterscheibe bewirkt. Es kann ferner ein Federelement vorgesehen sein, dass die Excenterscheibe in Richtung auf die Gegenfläche belastet und so auch beim Anheben der Welle eine Führung der Ringfläche an der Gegenfläche erzwingt. Eine Zwangsführung der Excenterscheibe kann aber z. B. auch durch eine Kulissenführung ermöglicht werden.Advantageously, the control means comprise a circumferential annular surface of the eccentric disc, which can be guided on a mating surface lying in the region of the support plane. With a lowering of the shaft relative to the static surface lying in the region of the support plane, a pivoting of the closure means or the eccentric disc is thereby effected in a simple manner. It may further be provided a spring element, that the eccentric disc loaded in the direction of the counter surface and thus forces a guide of the annular surface on the counter surface even when lifting the shaft. A forced operation of the eccentric but z. B. also be made possible by a slotted guide.

Günstig ist es dabei, wenn die Gegenfläche an einem an der Abdeckeinrichtung angeordneten Steg ausgebildet ist. Dieser Steg kann dabei auch zumindest einen Teil der Stützebene ausbilden.It is favorable in this case if the mating surface is formed on a web arranged on the covering device. This web can also form at least a part of the support plane.

Bei einer schwenkbaren Lagerung der Motoranordnung mit der Welle und dem zumindest einen Schneidwerkzeug gegenüber der Abdeckeinrichtung und der Stützebene ist es von Vorteil, wenn die schlitzförmige Durchführung bogenförmig bzw. in einem Radius in einer Seitenwand der Abdeckeinrichtung verläuft. Hierdurch kann die Schlitzbreite der Durchführung so gering ausgebildet werden, dass die Welle innerhalb der notwendigen Toleranz eben durch diese hindurchgeführt werden kann.In a pivotable mounting of the motor assembly with the shaft and the at least one cutting tool relative to the cover and the support plane, it is advantageous if the slot-shaped passage extends arcuately or in a radius in a side wall of the cover. As a result, the slot width of the implementation can be made so small that the shaft can be passed through the necessary tolerance just through this.

Eine besonders gute Abdichtung der Abdeckeinrichtung an der Durchführung wird erzielt, wenn das Verschlusselement gleit-dichtend an der, die schlitzförmige Durchführung aufweisenden Seitenwand der Abdeckeinrichtung anliegt.A particularly good sealing of the cover on the implementation is achieved when the closure element slidably bears against the, the slot-shaped implementation having side wall of the cover.

Weitere Vorteile und Massnahmen der Erfindung ergeben sich aus den Unteransprüchen, der nachfolgenden Beschreibung und den Zeichnungen. In den Zeichnungen ist die Erfindung in einem Ausführungsbeispiel dargestellt.Further advantages and measures of the invention will become apparent from the dependent claims, the following description and the drawings. In the drawings, the invention is shown in one embodiment.

Es zeigen:

Fig. 1
ein Schneidgerät in teilweise geschnittener Ansicht mit nicht abgesenkten Schneidwerkzeugen,
Fig. 2
eine teilweise Schnittansicht durch das Schneidgerät entlang der Linie II - II aus Fig. 1,
Fig.3
das Schneidgerät in teilweise geschnittener Ansicht gem. Fig. 1 mit in einen Untergrund abgesenkten Schneidwerkzeugen,
Fig. 4
eine teilweise Schnittansicht durch das Schneidgerät entlang der Linie IV - IV aus Fig. 3.
Show it:
Fig. 1
a cutting device in a partially cutaway view with non-lowered cutting tools,
Fig. 2
a partial sectional view through the cutter along the line II - II of Fig. 1,
Figure 3
the cutter in a partially cut view acc. 1 with lowered in a background cutting tools,
Fig. 4
a partial sectional view through the cutter along the line IV - IV of Fig. 3rd

Das in den Figuren 1 bis 4 dargestellte Schneidgerät 10, welches hier als Mauernutfräse ausgebildet ist, weist zwei auf einer Welle 12 angeordnete Schneidwerkzeuge 14, wie z. B. Diamanttrennscheiben oder Sägeblätter, auf. Die Welle 12 und damit die Schneidwerkzeuge 14 sind über eine mit der Welle 12 gekoppelten Motoranordnung 13, die ggf. eine Getriebeeinrichtung beinhalten kann, antreibbar.The cutter 10 shown in Figures 1 to 4, which is designed here as a wall chaser, has two arranged on a shaft 12 cutting tools 14, such. As diamond blades or saw blades, on. The shaft 12 and thus the cutting tools 14 are drivable via a coupled to the shaft 12 engine assembly 13, which may optionally include a transmission device.

In der in den Figuren 1 und 2 dargestellten Stellung der Schneidwerkzeuge 14 befinden sich diese nahezu vollständig im Innenraum einer als Schutzhaube ausgebildeten haubenförmigen Abdeckeinrichtung 20. An dieser Abdeckeinrichtung ist eine Absaugöffnung 30 (vgl. Fig. 1) angeordnet, die mit einer hier nicht wiedergegebenen Absaugeinrichtung verbindbar ist. An dem offenen Ende der Abdeckeinrichtung 20, bildet diese eine Stützebene 11 aus, an welcher das Schneidgerät 10 an einen zu bearbeitenden Untergrund U anlegbar ist (vgl. Figuren 3 und 4).In the position of the cutting tools 14 shown in FIGS. 1 and 2, these are located almost completely in the interior of a hood-shaped covering device 20 designed as a protective hood. A suction opening is provided on this covering device 30 (see Fig. 1) arranged, which is connectable to a suction device not shown here. At the open end of the covering device 20, this forms a support plane 11, on which the cutting device 10 can be applied to a substrate U to be processed (compare FIGS. 3 and 4).

In einer Seitenwand 28 der Abdeckeinrichtung 20, die der Motoranordnung 13 zugewandt ist, ist eine schlitzförmige Durchführung 22 für die Welle 12 angeordnet, durch die diese aus der Abdeckeinrichtung 20 herausgeführt ist. Die Motoranordnung 13 mit der Welle 12 und den Schneidwerkzeugen 14 ist schwenkbar gelagert (Schwenklagerstelle in den Figuren nicht dargestellt), so dass die Welle 12 mit den Schneidwerkzeugen 14 gegenüber der Stützebene 11 bzw. gegenüber der Abdeckeinrichtung 20 absenkbar ist (vgl. Pfeil 40 in Fig. 2).In a side wall 28 of the cover 20, which faces the motor assembly 13, a slot-shaped passage 22 is arranged for the shaft 12, through which it is led out of the cover 20. The motor assembly 13 with the shaft 12 and the cutting tools 14 is pivotally mounted (pivot bearing point not shown in the figures), so that the shaft 12 with the cutting tools 14 with respect to the support plane 11 and against the cover 20 is lowered (see arrow 40 in FIG Fig. 2).

An der Abdeckeinrichtung 20 ist ein Dichtmittel in Form eines Verschlussmittels 23 vorgesehen, das hier als kreisrunde Excenterscheibe ausgebildet ist. Das Verschlussmittel 23 weist einen exzentrisch angeordneten Durchbruch 24 auf, durch den die Welle 12 hindurchgeführt ist. Das Verschlussmittel 23 liegt dabei an der Seitenwand 28 an und deckt die schlitzförmige Durchführung 22 dichtend ab. An dem Verschlussmittel 23 ist um den Durchbruch 24 herum ein Gegenlagerstutzen 29 angeordnet der in einem Lagerstutzen 17 drehbeweglich aufgenommen ist.On the cover 20, a sealing means in the form of a closure means 23 is provided which is formed here as a circular eccentric disc. The closure means 23 has an eccentrically arranged aperture 24, through which the shaft 12 is passed. The closure means 23 abuts against the side wall 28 and covers the slot-shaped passage 22 sealingly. At the closure means 23, an abutment nozzle 29 is disposed around the aperture 24 around which is rotatably received in a bearing neck 17.

An dem als kreisförmige Excenterscheibe ausgebildeten Verschlussmittel 23 ist randlich ein als Ringfläche 26 ausgebildetes Steuermittel 25 angeordnet. Dieses Steuermittel 25 dient der automatischen Verschwenkung des Verschlussmittels 23, wenn die Schneidwerkzeuge 14 mit der Welle 12 gegenüber der Abdeckeinrichtung 20 und der Stützebene 11 abgesenkt werden. Dazu liegt das Steuermittel 25 bzw. die Ringfläche 26 an einer Gegenfläche 16 an, die an einem senkrecht von der Seitenwand 28 abragenden Steg 21 ausgebildet ist.At the designed as a circular eccentric locking means 23 randlich designed as an annular surface 26 control means 25 is arranged. This control means 25 serves for the automatic pivoting of the closure means 23 when the cutting tools 14 are lowered with the shaft 12 with respect to the cover 20 and the support plane 11. For this purpose, the control means 25 and the annular surface 26 bears against a mating surface 16 which is formed on a web 21 projecting perpendicularly from the side wall 28.

Wird also, wie in Fig. 2 dargestellt, die Welle 12 mit den Schneidwerkzeugen 14 gegenüber der Abdeckeinrichtung 20 und der Stützebene 11 abgesenkt (vgl. Figur 2, Bezugszeichen 40), dann vollführt das Verschlussmittel 23 auf Grund der Führung der Ringfläche 26 auf der Gegenfläche 16 und des kürzer werdenden Abstands der Welle 12 zum Steg 21 eine Verschwenkbewegung 41. Nach der vollständigen Absenkung der Welle 12 mit den Schneidwerkzeugen 14 gegenüber der Abdeckeinrichtung 20 und der Stützebene 11, wenn die Schneidwerkzeuge 14 z. B. in einen Untergrund U eingetaucht sind (vgl. Figuren 3 und 4), dann ist das Verschlussmittel 23 nahezu um 180° verschwenkt, wie insbesondere aus Fig. 4 zu entnehmen ist. Die Abdichtung der Durchführung 22 erfolgte dabei auch während der Verschwenkbewegung 41 im Wesentlichen vollständig. Ist an der Absaugöffnung 30 eine Staubabsaugung angeschlossen, so geht nahezu kein Unterdruck an der Durchführung 22 verloren. Luft kann lediglich zwischen der Stützebene und dem Untergrund U angesaugt werden.If, as shown in Fig. 2, the shaft 12 with the cutting tools 14 relative to the cover 20 and the support plane 11 is lowered (see Figure 2, reference numeral 40), then performs the closure means 23 due to the guidance of the annular surface 26 on the Counter surface 16 and the shorter distance of the shaft 12 to the web 21 a pivoting movement 41. After the complete lowering of the shaft 12 with the cutting tools 14 relative to the cover 20 and the support plane 11 when the cutting tools 14 z. B. are immersed in a substrate U (see Figures 3 and 4), then the closure means 23 is pivoted almost 180 °, as can be seen in particular from Fig. 4. The sealing of the bushing 22 was carried out during the pivoting movement 41 substantially completely. Is at the suction opening 30 a Dust extraction connected, so almost no negative pressure at the passage 22 is lost. Air can only be sucked in between the support plane and the ground U.

Zur Bewegung der Schneideinrichtung 10 auf dem Untergrund U sind noch Führungsrollen 19 vorgesehen, wie z. B. vier Führungsrollen mit jeweils einer Führungsrolle 19 an jeder Ecke einer im Wesentlichen rechteckigen Stützebene 11. Die Führungsrollen 19 können dabei auch die Stützebene 11 etwas von dem Untergrund U beabstanden.To move the cutter 10 on the substrate U are still guide rollers 19 are provided, such. B. four guide rollers, each with a guide roller 19 at each corner of a substantially rectangular support plane 11. The guide rollers 19 can thereby also the support plane 11 slightly spaced from the substrate U.

Claims (6)

  1. Cutting device having at least one cutting tool (14) which is carried by a shaft (12) and can be driven by a motor drive (13), and having a supporting surface (11) which can be placed on a substrate (U) that is to be operated on and with respect to which the cutting tool (14) can be lowered, and having a hood shaped covering means (20) for the cutting tool (14) which is static with respect to the supporting surface (11) and has a slot shaped passage (22) for the shaft (12), sealing means being provided for sealing the slot shaped passage (22) at least partially,
    characterised in that the sealing means have a closure element (23) which can articulate eccentrically around the shaft and includes a control means (25) for transforming lowering movement (40) of the shaft (12) relative to the covering means (20) into an articulating movement (41) of the closure element (23).
  2. Cutting device according to claim 1, characterised in that the closure element (23) is constructed as an eccentric disc which has an eccentrically arranged opening (24) for the shaft (12).
  3. Cutting device according to claim 1 or 2, characterised in that the control means (25) include a peripheral ring surface (26) of the eccentric disc which can be guided on a counter surface (16) located in the region of the supporting surface (11).
  4. Cutting device according to one of claims 1 to 3, characterised in that the counter surface (16) is formed on a flange (21) arranged on the covering means (20).
  5. Cutting device according to one of claims 1 to 4, characterised in that the slot shaped passage (22) extends arcuately in a side wall (28) of the covering means (20).
  6. Cutting device according to one of claims 1 to 5, characterised in that the closure element (23) abuts with sliding sealing action against the side wall (28) of the covering means (20) that has the slot shaped passage (22).
EP05105492A 2004-06-21 2005-06-21 Cutting device such as wall groove milling tool provided with sealing means Active EP1609572B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004029986 2004-06-21
DE102004029986A DE102004029986B4 (en) 2004-06-21 2004-06-21 cutter

Publications (2)

Publication Number Publication Date
EP1609572A1 EP1609572A1 (en) 2005-12-28
EP1609572B1 true EP1609572B1 (en) 2007-08-15

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EP05105492A Active EP1609572B1 (en) 2004-06-21 2005-06-21 Cutting device such as wall groove milling tool provided with sealing means

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EP (1) EP1609572B1 (en)
AT (1) ATE369955T1 (en)
DE (2) DE102004029986B4 (en)

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CN108290271A (en) * 2015-11-25 2018-07-17 喜利得股份公司 Portable hand-held abrasive wheel cutting machine

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GB0521021D0 (en) * 2005-10-15 2005-11-23 Curtis Machine Tools Ltd Cylindrical grinding machine
DE102011122459A1 (en) * 2011-12-22 2013-06-27 Mafell Ag hand milling machine
EP3173189A1 (en) * 2015-11-25 2017-05-31 HILTI Aktiengesellschaft Portable, hand held cutting-off machine
EP3173188A1 (en) * 2015-11-25 2017-05-31 HILTI Aktiengesellschaft Portable, hand held cutting-off machine
CN107696304B (en) * 2017-09-26 2019-03-08 北龙建设集团有限公司 A kind of clip equipment that can reduce construction industry accident
CN111531730B (en) * 2020-05-15 2021-08-13 中安华力建设集团有限公司 Construction engineering ground storehouse pipeline laying casing groove arranges cutting device

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Publication number Priority date Publication date Assignee Title
CN108290271A (en) * 2015-11-25 2018-07-17 喜利得股份公司 Portable hand-held abrasive wheel cutting machine

Also Published As

Publication number Publication date
EP1609572A1 (en) 2005-12-28
DE102004029986A1 (en) 2006-01-05
DE502005001214D1 (en) 2007-09-27
DE102004029986B4 (en) 2007-06-14
ATE369955T1 (en) 2007-09-15

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