EP3551379B1 - Dust hood for an angle grinder - Google Patents

Dust hood for an angle grinder Download PDF

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Publication number
EP3551379B1
EP3551379B1 EP17809211.0A EP17809211A EP3551379B1 EP 3551379 B1 EP3551379 B1 EP 3551379B1 EP 17809211 A EP17809211 A EP 17809211A EP 3551379 B1 EP3551379 B1 EP 3551379B1
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EP
European Patent Office
Prior art keywords
hood
dust hood
depth stop
dust
cut
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.)
Active
Application number
EP17809211.0A
Other languages
German (de)
French (fr)
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EP3551379A1 (en
Inventor
Oliver Ohlendorf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hilti AG
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Hilti AG
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Publication date
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Publication of EP3551379A1 publication Critical patent/EP3551379A1/en
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Classifications

    • 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
    • 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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028—Angle tools
    • 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
    • B24B27/00—Other grinding machines or devices
    • B24B27/06—Grinders for cutting-off
    • B24B27/08—Grinders for cutting-off being portable
    • 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
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B24B55/102—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/003—Stops for limiting depth in rotary hand tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B9/00—Portable power-driven circular saws for manual operation
    • B27B9/02—Arrangements for adjusting the cutting depth or the amount of tilting

Definitions

  • the present invention relates to a dust hood with a flange for attaching the dust hood to a gear neck of a cut-off machine.
  • the dust hood is equipped with a hood body for at least partially covering a circular cutting disc on both sides, and with a suction connection via which any subsoil that has been removed can be sucked out of the hood body.
  • the dust hood has a depth stop, by means of which the cutting depth of the cutting disc can be limited.
  • Dust hoods of the type mentioned are basically known from the prior art. They serve to prevent dust from spreading during cutting work, in order to protect the health of the user of the cut-off machine.
  • the KR 2015 0099624 A is considered to be the closest prior art and discloses a cutting device with which the cutting depth can be adjusted.
  • the JP 2016 049574 A discloses a tool cover attached to a power tool, such as a grinder, to cover the grinding tool.
  • the object is achieved by a dust hood according to claim 1.
  • the invention includes the finding that depth stops in dust hoods of the prior art are mounted on both sides of the hood body, which increases the complexity on the one hand, and the force required for depth adjustment (caused by friction) and the installation space requirement on the other. As a result, the dust hood according to the invention is particularly easy to handle.
  • the depth stop of the dust hood is mounted on the flange side, in particular exclusively on the flange side, of the hood body via a single-arm bearing.
  • this results in a comparatively small installation space requirement.
  • a simpler structural design of the depth stop is possible, which can be reflected in lower costs, for example.
  • the single-arm bearing has a bearing ring that encloses the flange in a ring shape. In this way, a bearing diameter of the single-arm bearing can be kept comparatively small in order to keep frictional forces low.
  • a comparatively low overall height of the dust hood can be achieved in particular in that the clamping nut side, ie the side of the hood body opposite the flange side, is free of a bearing.
  • This clamping nut side is preferably free of a bearing ring.
  • a drive spindle of the cut-off grinder can protrude coaxially through the flange when the dust hood is connected to the cut-off grinder and the cutting disc is accommodated in the dust hood.
  • the depth stop is designed in one piece with the single-arm bearing and the bearing ring.
  • the depth stop can be designed as a hood in the shape of a sector of a circle.
  • the depth stop can be guided on an end face of the hood body and/or the depth stop can at least partially encompass an end face of the hood body. It has proven particularly advantageous if the depth stop is made of plastic.
  • the depth stop has a position lock.
  • the depth stop can thus be locked in a respective relative position with respect to the dust hood.
  • the position lock can have a spring element integrated into the depth stop.
  • This spring element can be used to implement a snap and/or locking mechanism, via which the cutting disk can be adjusted in steps, for example in 5 mm steps. Alternatively, stepless cutting depth adjustment of the cutting disc by means of the position lock is conceivable.
  • the spring element is preferably functionally integrated in a depth stop made of plastic. In the non-deflected state, the spring element can be part of a surface of the depth stop.
  • the depth stop can be adjusted in height solely by rotating it about the axis of rotation of the cutting disk.
  • the depth stop is preferably free of a linear guide.
  • a main suction channel which is connected to the suction connection and preferably extends tangentially to the cutting disk is formed in the hood body.
  • the main suction channel is divided by a hood web into two suction chambers, which are preferably designed symmetrically to one another.
  • the object is also achieved by a cut-off grinder with a gear neck, in particular an angle grinder, and with a dust hood of the type described above, the dust hood being arranged or to be arranged on the gear neck by means of its flange. Due to the fact that the depth stop is mounted on the flange side of the hood body via a one-arm bearing, the depth stop is mounted between the cut-off machine and the hood body.
  • a dust hood 100 according to the invention is in 1 shown.
  • the dust hood 100 is equipped with a flange for attaching the dust hood 100 to a gear neck of an angle grinder (cf. 4 ).
  • the dust hood has a hood body 10 for at least partially covering a circular cutting disk on both sides (cf. 3 , cutting disc 220).
  • the dust hood 100 has a suction connection 40 via which the subsoil, for example in the form of dust, can be sucked off from the hood body 10 .
  • the dust hood 100 is equipped with a depth stop 80 which is mounted on the hood body 10 via a single-arm bearing 81 on the flange side, ie on a flange side FS. Again 1 can be removed, the storage takes place via a bearing ring 83 which encloses the flange 90 annularly.
  • the bearing ring 83 is part of the single-arm bearing 81 of the depth stop 80.
  • the connecting flange 90 is formed onto the hood body.
  • a drive spindle 230 of the angle grinder 200 protrudes coaxially through the flange 90 when the dust hood 100 is connected to the angle grinder 200 and the cutting disc 220 is accommodated in the dust hood 100 .
  • the depth stop 80 is integrally formed with the single-arm bearing 81 and the bearing ring 83 from plastic.
  • the depth stop 80 is mounted on its one-arm bearing 81 and in particular the bearing ring 83 exclusively on the flange side FS.
  • the clamping nut side SP is free of any storage, in particular a centric storage by means of a bearing ring.
  • the depth stop 80 is designed as a hood in the shape of a sector of a circle, which is guided on an end face 15 of the hood body and partially encompasses the end face 15 of the hood body 10 .
  • this encompassing of the periphery of the hood body 10 should in particular not be understood as a bearing, but rather as a guiding aid.
  • the in 1 shown dust hood 100 also free of a linear guide.
  • the suction connection 40 which opens into a main suction channel 50 connected to it, is clearly visible.
  • the main suction channel extends in the tangential direction T to the cutting disk 220 (cf. also 2 and 3 ).
  • the main suction channel 50 is divided by a hood web 20 into two suction chambers 30, 30', which are designed symmetrically to one another and which improve the flow situation in the dust hood 100 in the course of a suction process.
  • FIG 2 shows the dust hood 100 of FIG 1 looking at the clamping nut side SP.
  • a circular cutting disk 220 in the form of a diamond disk. This is set in motion via the drive spindle 230 in the separating mode.
  • the circular cutting disc 220 is partially covered by the hood body 10 on both sides. An uncovered part of the separating disk 220 projects out of the hood body 10 through a disk exit opening 70 on the underside of the hood body 10 .
  • the clamping nut side SP is free of any bearings, or free of the reference to 1 described bearing ring 83. It is easy to see that the depth stop 80 partially encompasses an end face 15 of the hood body 10 and is thereby guided as an aid.
  • FIG. 2 shows the zero position NP of the depth stop 80, ie the cutting disk 220 can dip into the ground to the maximum. A full cut is thus possible, in which a substrate, not shown here, preferably makes complete contact with the disc outlet opening 70 .
  • the depth stop 80 has a position lock 87 which, in the exemplary embodiment shown here, has a spring element 89 integrated into the depth stop 80 .
  • a position lock 87 which, in the exemplary embodiment shown here, has a spring element 89 integrated into the depth stop 80 .
  • stepless rotation of the depth stop 80 about the axis of rotation R of the cutting disk 220 is possible via this spring element 89 .
  • 3 serves to illustrate a deployment position AP of the depth stop 80. This is initially based on FIG 2 the depth stop 80 is shown in the zero position NP. In addition to this, a depth stop 80′ which is in the deployed position AP is shown. In this context it should be mentioned that the representation of 3 is to be understood only schematically. In fact, the in 3 shown exhibition position AP and the zero position NP are not taken simultaneously.
  • the depth stop 80 In its deployed position AP, the depth stop 80 protrudes beyond the pane exit opening in the direction of the substrate UG. Thus, a depth of cut not shown here cutting disc can be limited.
  • the depth stop 80 is held in its deployed position AP by the spring element 89' that is also displaced.
  • FIG 4 shows the dust hood together with a cut-off grinder 200 (cut-off grinder only partially shown).
  • the dust hood 100 is connected to a gear neck 210 of the angle grinder 200 via the flange 90 (not shown here).
  • the bearing ring 83 enclosing the flange (not shown here) is located between the angle grinder 200 and the hood body 10 .
  • the clamping nut side SP is free of storage.
  • FIG. 5 finally shows the depth stop 80 of the dust hood of FIG Figures 1 to 4 .
  • the depth stop 80 der figure 5 is designed as a hood in the shape of a sector of a circle and implements a single-arm bearing 81 via which the depth stop 80 (as, for example, in 1 shown) can be connected to the hood body 10.
  • the depth stop 80 with one-arm bearing 81, bearing ring 83 and position lock 87 together with the integrated spring element 89 is made in one piece from plastic. This results in a particularly favorable manufacturing option.
  • the in figure 5 Depth stop 80 shown can be produced by a one-step injection molding process.
  • the sector area SB running between the bearing ring 83 and a front area ST defines an "arm" of the single-arm bearing 81.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Sawing (AREA)

Description

"Staubhaube für einen Trennschleifer""Dust hood for a cut-off grinder"

Die vorliegende Erfindung betrifft eine Staubhaube mit einem Flansch zum Befestigen der Staubhaube an einem Getriebehals eines Trennschleifers. Die Staubhaube ist ausgestattet mit einem Haubenkörper zum zumindest abschnittsweisen, beidseitigen Abdecken einer kreisförmigen Trennscheibe und mit einem Absauganschluss über den ein Untergrundabtrag aus dem Haubenkörper abgesaugt werden kann. Die Staubhaube weist einen Tiefenanschlag auf, mittels dem eine Schnitttiefe der Trennscheibe begrenzt werden kann.The present invention relates to a dust hood with a flange for attaching the dust hood to a gear neck of a cut-off machine. The dust hood is equipped with a hood body for at least partially covering a circular cutting disc on both sides, and with a suction connection via which any subsoil that has been removed can be sucked out of the hood body. The dust hood has a depth stop, by means of which the cutting depth of the cutting disc can be limited.

Staubhauben der eingangs genannten Art sind grundsätzlich aus dem Stand der Technik bekannt. Sie dienen der Vermeidung einer Staubausbreitung bei Trennarbeiten, um die Gesundheit eines Benutzers des Trennschleifers zu schützen.Dust hoods of the type mentioned are basically known from the prior art. They serve to prevent dust from spreading during cutting work, in order to protect the health of the user of the cut-off machine.

Die KR 2015 0099624 A wird als nächstliegender Stand der Technik gesehen und offenbart eine Vorrichtung zum Schneiden, mit der die Schnitttiefe eingestellt werden kann. Die JP 2016 049574 A offenbart eine Werkzeugabdeckung, die an einem Elektrowerkzeug, wie zum Beispiel einer Schleifmaschine, angebracht ist, um das Schleif-Werkzeug abzudecken.the KR 2015 0099624 A is considered to be the closest prior art and discloses a cutting device with which the cutting depth can be adjusted. the JP 2016 049574 A discloses a tool cover attached to a power tool, such as a grinder, to cover the grinding tool.

Es ist Aufgabe der vorliegenden Erfindung, eine besonders einfach handhabbare Staubhaube bereitzustellen.It is the object of the present invention to provide a dust hood that is particularly easy to handle.

Die Aufgabe wird durch eine Staubhaube gemäß Anspruch 1 gelöst.The object is achieved by a dust hood according to claim 1.

Bevorzugte Ausführungsformen sind in den abhängigen Ansprüchen offenbart.Preferred embodiments are disclosed in the dependent claims.

Die Erfindung schließt die Erkenntnis ein, dass Tiefenanschläge bei Staubhauben des Standes der Technik beidseitig des Haubenkörpers gelagert sind, was zum einen die Komplexität, zum anderen den Kraftbedarf bei der Tiefenverstellung (bewirkt durch Reibung) und den Bauraumbedarf erhöht. Dadurch ist die erfindungsgemäße Staubhaube besonders einfach handhabbar.The invention includes the finding that depth stops in dust hoods of the prior art are mounted on both sides of the hood body, which increases the complexity on the one hand, and the force required for depth adjustment (caused by friction) and the installation space requirement on the other. As a result, the dust hood according to the invention is particularly easy to handle.

In vorteilhafter Weiterbildung des Standes der Technik, ist der Tiefenanschlag der Staubhaube über eine Einarmlagerung flanschseitig, insbesondere ausschließlich flanschseitig am Haubenkörper gelagert. Dadurch ergibt sich zum einen ein vergleichsweise geringer Bauraumbedarf. Darüber hinaus ist eine einfachere konstruktive Gestaltung des Tiefenanschlags möglich, was sich beispielsweise in geringeren Kosten niederschlagen kann. Es hat sich als vorteilhaft herausgestellt, wenn die Einarmlagerung einen Lagerring aufweist, der den Flansch ringförmig umschließt. Derart kann ein Lagerdurchmesser der Einarmlagerung vergleichsweise klein gehalten werden, um Reibungskräfte gering zu halten.In an advantageous development of the prior art, the depth stop of the dust hood is mounted on the flange side, in particular exclusively on the flange side, of the hood body via a single-arm bearing. On the one hand, this results in a comparatively small installation space requirement. In addition, a simpler structural design of the depth stop is possible, which can be reflected in lower costs, for example. It has turned out to be advantageous if the single-arm bearing has a bearing ring that encloses the flange in a ring shape. In this way, a bearing diameter of the single-arm bearing can be kept comparatively small in order to keep frictional forces low.

Eine vergleichsweise geringe Bauhöhe der Staubhaube kann insbesondere dadurch erreicht werden, dass die Spannmutterseite, das heißt die der Flanschseite gegenüberliegende Seite des Haubenkörpers, frei von einer Lagerung ist. Vorzugsweise ist diese Spannmutterseite frei von einem Lagerring.A comparatively low overall height of the dust hood can be achieved in particular in that the clamping nut side, ie the side of the hood body opposite the flange side, is free of a bearing. This clamping nut side is preferably free of a bearing ring.

Es hat sich als vorteilhaft herausgestellt, wenn der Anschlussflansch an den Haubenkörper angeformt ist. Eine Antriebsspindel des Trennschleifers kann, wenn die Staubhaube mit dem Trennschleifer verbunden und die Trennscheibe in der Staubhaube aufgenommen ist, koaxial durch den Flansch hindurch ragen.It has turned out to be advantageous if the connecting flange is molded onto the hood body. A drive spindle of the cut-off grinder can protrude coaxially through the flange when the dust hood is connected to the cut-off grinder and the cutting disc is accommodated in the dust hood.

Es hat sich als vorteilhaft herausgestellt, wenn der Tiefenanschlag mit der Einarmlagerung und dem Lagerring einstückig ausgebildet ist. Der Tiefenanschlag kann als kreissektorförmige Haube ausgebildet sein. Alternativ oder zusätzlich kann der Tiefenanschlag an einer Stirnseite des Haubenkörpers geführt sein und/oder kann der Tiefenanschlag eine Stirnseite des Haubenkörpers zumindest abschnittsweise umgreifen. Es hat sich als besonders vorteilhaft herausgestellt, wenn der Tiefenanschlag aus Kunststoff besteht.It has proven to be advantageous if the depth stop is designed in one piece with the single-arm bearing and the bearing ring. The depth stop can be designed as a hood in the shape of a sector of a circle. Alternatively or additionally, the depth stop can be guided on an end face of the hood body and/or the depth stop can at least partially encompass an end face of the hood body. It has proven particularly advantageous if the depth stop is made of plastic.

In einer weiteren bevorzugten Ausgestaltung weist der Tiefenanschlag eine Lagearretierung auf. Somit kann der Tiefenanschlag, in eine jeweiligen Relativlage bezüglich der Staubhaube, arretiert werden. Die Lagearretierung kann ein in den Tiefenanschlag integriertes Federelement aufweisen. Über dieses Federelement kann ein Schnapp- und/oder Rastmechanismus realisiert sein, über den eine Stufenverstellung der Trennscheibe, beispielsweise in 5-mm-Schritten erfolgen kann. Alternativ ist eine stufenlose Schnitttiefenverstellung der Trennscheibe mittels der Lagearretierung denkbar. Vorzugsweise ist das Federelement in einem aus Kunststoff bestehenden Tiefenanschlag funktionsintegriert. Das Federelement kann, im nicht ausgelenkten Zustand, Teil einer Oberfläche des Tiefenanschlags sein.In a further preferred embodiment, the depth stop has a position lock. The depth stop can thus be locked in a respective relative position with respect to the dust hood. The position lock can have a spring element integrated into the depth stop. This spring element can be used to implement a snap and/or locking mechanism, via which the cutting disk can be adjusted in steps, for example in 5 mm steps. Alternatively, stepless cutting depth adjustment of the cutting disc by means of the position lock is conceivable. The spring element is preferably functionally integrated in a depth stop made of plastic. In the non-deflected state, the spring element can be part of a surface of the depth stop.

Es hat sich als vorteilhaft herausgestellt, wenn der Tiefenanschlag ausschließlich durch Verdrehen um die Rotationsachse der Trennscheibe höhenverstellbar ist. Vorzugsweise ist der Tiefenanschlag frei von einer Linearführung.It has proven to be advantageous if the depth stop can be adjusted in height solely by rotating it about the axis of rotation of the cutting disk. The depth stop is preferably free of a linear guide.

Erfindungsgemäß ist im Haubenkörper ein mit dem Absauganschluss verbundener Hauptabsaugkanal ausgebildet, der sich vorzugsweise tangential zur Trennscheibe erstreckt. Der Hauptabsaugkanal ist erfindungsgemäß durch einen Haubensteg in zwei Saugkammern unterteilt, die vorzugsweise symmetrisch zueinander ausgebildet sind.According to the invention, a main suction channel which is connected to the suction connection and preferably extends tangentially to the cutting disk is formed in the hood body. According to the invention, the main suction channel is divided by a hood web into two suction chambers, which are preferably designed symmetrically to one another.

Die Aufgabe wird ebenfalls gelöst durch einen Trennschleifer mit einem Getriebehals, insbesondere einem Winkelschleifer, und mit einer Staubhaube der vorbeschriebenen Art, wobei die Staubhaube mittels ihres Flansches am Getriebehals angeordnet, bzw. anzuordnen ist. Dadurch, dass der Tiefenanschlag über eine Einarmlagerung flanschseitig am Haubenkörper gelagert ist, ist eine Lagerung des Tiefenanschlags zwischen Trennschleifer und Haubenkörper realisiert.The object is also achieved by a cut-off grinder with a gear neck, in particular an angle grinder, and with a dust hood of the type described above, the dust hood being arranged or to be arranged on the gear neck by means of its flange. Due to the fact that the depth stop is mounted on the flange side of the hood body via a one-arm bearing, the depth stop is mounted between the cut-off machine and the hood body.

Weitere Vorteile ergeben sich aus der folgenden Figurenbeschreibung. In den Figuren sind verschiedene Ausführungsbeispiele der vorliegenden Erfindung dargestellt. Die Figuren, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmässigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Further advantages result from the following description of the figures. Various exemplary embodiments of the present invention are shown in the figures. The figures, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them to form further meaningful combinations.

In den Figuren sind gleiche und gleichartige Komponenten mit gleichen Bezugszeichen beziffert.In the figures, the same and similar components are denoted by the same reference symbols.

Es zeigen:

Fig. 1
ein bevorzugtes Ausführungsbeispiel einer erfindungsgemäßen Staubhaube in Draufsicht;
Fig. 2
eine spannmutterseitige Ansicht der Staubhaube aus Fig. 1 mit ausgestelltem Tiefenanschlag;
Fig. 3
die Staubhaube der Fig. 1 und 2 mit aufgenommener Trennscheibe;
Fig. 4
die Staubhaube der Figuren 1 bis 3 angeordnet an einem Trennschleifer;
Fig. 5
den Tiefenanschlag der Staubhaube der Figuren 1 bis 4;
Fig. 6
eine Seitenansicht der Staubhaube der Figuren 1 bis 4 aus Sicht des Trennschleifers.
Show it:
1
a preferred embodiment of a dust hood according to the invention in plan view;
2
a view of the dust hood from the clamping nut side 1 with flared depth stop;
3
the dust hood of 1 and 2 with added cutting disc;
4
the dust hood of Figures 1 to 3 arranged on a cutting machine;
figure 5
the depth stop of the dust hood Figures 1 to 4 ;
6
a side view of the dust hood Figures 1 to 4 from the cutter's point of view.

Ausführungsbeispiel:Example:

Eine erfindungsgemäße Staubhaube 100 ist in Fig. 1 dargestellt. Die Staubhaube 100 ist ausgestattet mit einem Flansch zum Befestigen der Staubhaube 100 an einem Getriebehals eines Trennschleifers (vgl. Fig. 4). Die Staubhaube weist einen Haubenkörper 10 zum zumindest abschnittsweisen, beidseitigen Abdecken einer kreisförmigen Trennscheibe (vgl. Fig. 3, Trennscheibe 220) auf. Ferner verfügt die Staubhaube 100 über einen Absauganschluss 40 über den Untergrundabtrag, beispielsweise in Form von Staub, aus dem Haubenkörper 10 abgesaugt werden kann.A dust hood 100 according to the invention is in 1 shown. The dust hood 100 is equipped with a flange for attaching the dust hood 100 to a gear neck of an angle grinder (cf. 4 ). The dust hood has a hood body 10 for at least partially covering a circular cutting disk on both sides (cf. 3 , cutting disc 220). Furthermore, the dust hood 100 has a suction connection 40 via which the subsoil, for example in the form of dust, can be sucked off from the hood body 10 .

Erfindungsgemäß ist die Staubhaube 100 ausgestattet mit einem Tiefenanschlag 80, der über eine Einarmlagerung 81 flanschseitig, das heißt auf einer Flanschseite FS, am Haubenkörper 10 gelagert ist. Wie der Fig. 1 entnommen werden kann, erfolgt die Lagerung über einen Lagerring 83, der den Flansch 90 ringförmig umschließt. Der Lagerring 83 ist Teil der Einarmlagerung 81 des Tiefenanschlags 80.According to the invention, the dust hood 100 is equipped with a depth stop 80 which is mounted on the hood body 10 via a single-arm bearing 81 on the flange side, ie on a flange side FS. Again 1 can be removed, the storage takes place via a bearing ring 83 which encloses the flange 90 annularly. The bearing ring 83 is part of the single-arm bearing 81 of the depth stop 80.

Der Anschlussflansch 90 ist an den Haubenkörper angeformt. Eine Antriebsspindel 230 des Trennschleifers 200 (vgl. Fig. 4) ragt, wenn die Staubhaube 100 mit dem Trennschleifer 200 verbunden und die Trennscheibe 220 in der Staubhaube 100 aufgenommen ist, koaxial durch den Flansch 90 hindurch.The connecting flange 90 is formed onto the hood body. A drive spindle 230 of the angle grinder 200 (cf. 4 ) protrudes coaxially through the flange 90 when the dust hood 100 is connected to the angle grinder 200 and the cutting disc 220 is accommodated in the dust hood 100 .

Wie bereits der Fig. 1 entnommen werden kann, und mit Bezug auf die weiteren Figuren noch erläutert wird, ist der Tiefenanschlag 80 mit der Einarmlagerung 81 und dem Lagerring 83 einstückig aus Kunststoff ausgebildet.As already the 1 can be removed, and will be explained with reference to the other figures, the depth stop 80 is integrally formed with the single-arm bearing 81 and the bearing ring 83 from plastic.

Wie aus der in Fig. 1 gezeigten Draufsicht besonders gut zu erkennen ist, ist der Tiefenanschlag 80 über seine Einarmlagerung 81 und insbesondere den Lagerring 83 ausschließlich auf der Flanschseite FS gelagert. Die Spannmutterseite SP ist frei von einer Lagerung, insbesondere einer zentrischen Lagerung mittels eines Lagerrings.How from the in 1 shown top view can be seen particularly well, the depth stop 80 is mounted on its one-arm bearing 81 and in particular the bearing ring 83 exclusively on the flange side FS. The clamping nut side SP is free of any storage, in particular a centric storage by means of a bearing ring.

Wie insbesondere aus der Zusammenschau mit Fig. 2 ersichtlich wird, ist der Tiefenanschlag 80 als kreissektorförmige Haube ausgebildet, die an einer Stimseite 15 des Haubenkörpers geführt ist und die Stirnseite 15 des Haubenkörpers 10 abschnittsweise umgreift. Dieser Umgriff in der Peripherie des Haubenkörpers 10 soll im Rahmen der vorliegenden Erfindung insbesondere nicht als Lagerung, sondern vielmehr als Führungshilfe verstanden werden. Somit ist die in Fig. 1 gezeigte Staubhaube 100 auch frei von einer Linearführung.As in particular from the synopsis with 2 As can be seen, the depth stop 80 is designed as a hood in the shape of a sector of a circle, which is guided on an end face 15 of the hood body and partially encompasses the end face 15 of the hood body 10 . In the context of the present invention, this encompassing of the periphery of the hood body 10 should in particular not be understood as a bearing, but rather as a guiding aid. Thus the in 1 shown dust hood 100 also free of a linear guide.

Eine in der Fig.1 nicht erkennbare kreisförmige Trennscheibe wird im Trennbetrieb um die Rotationsachse R in Drehrichtung DR angetrieben.one in the Fig.1 Unrecognizable circular cutting disc is driven in the cutting operation around the axis of rotation R in the direction of rotation DR.

Auf der rechten Seite der Fig. 1 gut zu erkennen ist der Absauganschluss 40, der in einen mit ihm verbundenen Hauptabsaugkanal 50 mündet. Der Hauptabsaugkanal erstreckt sich in tangentialer Richtung T zur Trennscheibe 220 (vgl. auch Fig. 2 und 3). Der Hauptabsaugkanal 50 ist durch einen Haubensteg 20 in zwei Saugkammern 30, 30' unterteilt, die symmetrisch zueinander ausgebildet sind und die die Strömungssituation in der Staubhaube 100 im Zuge eines Absaugvorgangs verbessern.On the right side of the 1 The suction connection 40, which opens into a main suction channel 50 connected to it, is clearly visible. The main suction channel extends in the tangential direction T to the cutting disk 220 (cf. also 2 and 3 ). The main suction channel 50 is divided by a hood web 20 into two suction chambers 30, 30', which are designed symmetrically to one another and which improve the flow situation in the dust hood 100 in the course of a suction process.

Fig. 2 zeigt die Staubhaube 100 der Fig. 1 mit Blick auf die Spannmutterseite SP. In der Staubhaube 100 aufgenommen ist eine kreisförmige Trennscheibe 220 in Form einer Diamantscheibe. Diese wird im Trennbetrieb über die Antriebsspindel 230 in Bewegung gesetzt. Die kreisförmige Trennscheibe 220 ist durch den Haubenkörper 10 beidseitig abschnittsweise abgedeckt. Ein nicht abgedeckter Teil der Trennscheibe 220 ragt durch eine Scheibenaustrittsöffnung 70 auf der Unterseite des Haubenkörpers 10 aus dem Haubenkörper 10 hinaus. 2 shows the dust hood 100 of FIG 1 looking at the clamping nut side SP. Housed within the dust hood 100 is a circular cutting disk 220 in the form of a diamond disk. This is set in motion via the drive spindle 230 in the separating mode. The circular cutting disc 220 is partially covered by the hood body 10 on both sides. An uncovered part of the separating disk 220 projects out of the hood body 10 through a disk exit opening 70 on the underside of the hood body 10 .

Wie der Fig. 2 entnommen werden kann, ist die Spannmutterseite SP frei von etwaigen Lagerungen, bzw. frei von dem mit Bezug auf Fig. 1 beschriebenen Lagerring 83. Gut zu erkennen ist, dass der Tiefenanschlag 80 eine Stirnseite 15 des Haubenkörpers 10 abschnittsweise umgreift und dadurch hilfsweise geführt ist.Again 2 can be removed, the clamping nut side SP is free of any bearings, or free of the reference to 1 described bearing ring 83. It is easy to see that the depth stop 80 partially encompasses an end face 15 of the hood body 10 and is thereby guided as an aid.

Fig. 2 zeigt die Nullposition NP des Tiefenanschlags 80, das heißt die Trennscheibe 220 kann maximal in den Untergrund eintauchen. Somit ist ein Vollschnitt möglich, bei dem ein hier nicht gezeigter Untergrund die Scheibenaustrittsöffnung 70 vorzugsweise vollständig kontaktiert. 2 shows the zero position NP of the depth stop 80, ie the cutting disk 220 can dip into the ground to the maximum. A full cut is thus possible, in which a substrate, not shown here, preferably makes complete contact with the disc outlet opening 70 .

Im oberen Bereich weist der Tiefenanschlag 80 eine Lagearretierung 87 auf, die im vorliegend dargestellten Ausführungsbeispiel ein in den Tiefenanschlag 80 integriertes Federelement 89 aufweist. Über dieses Federelement 89 ist im vorliegenden Fall ein stufenloses Verdrehen des Tiefenanschlags 80 um die Rotationsachse R der Trennscheibe 220 möglich.In the upper area, the depth stop 80 has a position lock 87 which, in the exemplary embodiment shown here, has a spring element 89 integrated into the depth stop 80 . In the present case, stepless rotation of the depth stop 80 about the axis of rotation R of the cutting disk 220 is possible via this spring element 89 .

Fig. 3 dient der Verdeutlichung einer Ausstellposition AP des Tiefenanschlags 80. Dazu ist zunächst in Anlehnung an Fig. 2 der Tiefenanschlag 80 in Nullposition NP dargestellt. Zusätzlich dazu ist ein in Ausstellposition AP ausgestellter Tiefenanschlag 80' gezeigt. In diesem Zusammenhang sei erwähnt, dass die Darstellung der Fig. 3 ausschließlich schematisch zu verstehen ist. Tatsächlich können die in Fig. 3 gezeigte Ausstellposition AP und die Nullposition NP nicht gleichzeitig eingenommen werden. 3 serves to illustrate a deployment position AP of the depth stop 80. This is initially based on FIG 2 the depth stop 80 is shown in the zero position NP. In addition to this, a depth stop 80′ which is in the deployed position AP is shown. In this context it should be mentioned that the representation of 3 is to be understood only schematically. In fact, the in 3 shown exhibition position AP and the zero position NP are not taken simultaneously.

In seiner Ausstellposition AP ragt der Tiefenanschlag 80 über die Scheibenaustrittsöffnung hinaus in Richtung des Untergrunds UG. Somit kann eine Schnitttiefe der hier nicht gezeigten Trennscheibe begrenzt werden. Durch das mitverschobenen Federelement 89' wird der Tiefenanschlag 80 in seiner Ausstellposition AP gehalten.In its deployed position AP, the depth stop 80 protrudes beyond the pane exit opening in the direction of the substrate UG. Thus, a depth of cut not shown here cutting disc can be limited. The depth stop 80 is held in its deployed position AP by the spring element 89' that is also displaced.

Fig. 4 zeigt die Staubhaube zusammen mit einem Trennschleifer 200 (Trennschleifer nur teilweise dargestellt). Über den hier nicht gezeigten Flansch 90 ist die Staubhaube 100 an einem Getriebehals 210 des Trennschleifers 200 angeschlossen. Der den hier nicht dargestellten Flansch umschließende Lagerring 83 ist zwischen Trennschleifer 200 und Haubenkörper 10 befindlich. Die Spannmutterseite SP ist frei von einer Lagerung. 4 shows the dust hood together with a cut-off grinder 200 (cut-off grinder only partially shown). The dust hood 100 is connected to a gear neck 210 of the angle grinder 200 via the flange 90 (not shown here). The bearing ring 83 enclosing the flange (not shown here) is located between the angle grinder 200 and the hood body 10 . The clamping nut side SP is free of storage.

Fig. 5 zeigt schließlich den Tiefenanschlag 80 der Staubhaube der Figuren 1 bis 4. Der Tiefenanschlag 80 der Fig. 5 ist als kreissektorförmige Haube ausgebildet und realisiert eine Einarmlagerung 81 über die der Tiefenanschlag 80 (wie beispielsweise in Fig. 1 gezeigt) am Haubenkörper 10 angeschlossen werden kann. figure 5 finally shows the depth stop 80 of the dust hood of FIG Figures 1 to 4 . The depth stop 80 der figure 5 is designed as a hood in the shape of a sector of a circle and implements a single-arm bearing 81 via which the depth stop 80 (as, for example, in 1 shown) can be connected to the hood body 10.

Wie der Fig. 5 entnommen werden kann, ist der Tiefenanschlag 80 mit Einarmlagerung 81, Lagerring 83 sowie Lagearretierung 87 nebst integriertem Federelement 89 einstückig aus Kunststoff ausgebildet. Somit ergibt sich eine besonders günstige Fertigungsmöglichkeit. Beispielsweise kann der in Fig. 5 gezeigte Tiefenanschlag 80 durch einen einschrittigen Spritzgussvorgang hergestellt werden. Der zwischen Lagerring 83 und einem Stirnbereich ST verlaufende Sektorbereich SB definiert einen "Arm" der Einarmlagerung 81.Again figure 5 can be removed, the depth stop 80 with one-arm bearing 81, bearing ring 83 and position lock 87 together with the integrated spring element 89 is made in one piece from plastic. This results in a particularly favorable manufacturing option. For example, the in figure 5 Depth stop 80 shown can be produced by a one-step injection molding process. The sector area SB running between the bearing ring 83 and a front area ST defines an "arm" of the single-arm bearing 81.

Fig. 6 zeigt schließlich die Staubhaube 100, angeschlossen an einem Trennschleifer 200, aus Sicht des Trennschleifers 200. Die im Haubenkörper 10 abschnittsweise, beidseitig aufgenommene kreisförmige Trennscheibe 220 dreht sich im Trennbetrieb in Drehrichtung DR, im Falle der Fig. 6 bedeutet dies eine Drehrichtung DR im Uhrzeigersinn. 6 finally shows the dust hood 100, connected to a cut-off machine 200, from the point of view of the cut-off machine 200 6 this means a clockwise direction of rotation DR.

BezugszeichenlisteReference List

1010
Haubenkörperhood body
2020
Haubensteghood web
30, 30'30, 30'
Saugkammernsuction chambers
5050
Hauptabsaugkanalmain suction channel
7070
Scheibenaustrittsöffnungdisc exit opening
8080
Tiefenanschlagdepth stop
8181
Einarmlagerungsingle arm support
8383
Lagerringbearing ring
8787
Lagearretierungposition locking
8989
Federelementspring element
9090
Flanschflange
100100
Staubhaubedust hood
200200
Trennschleifercutter
210210
Getriebehalsgear neck
220220
Schleifscheibegrinding wheel
230230
Antriebsspindeldrive spindle
APAP
Ausstellposition des TiefenanschlagsExtended position of the depth stop
DRDR
Drehrichtung der Schleifscheibedirection of rotation of the grinding wheel
FSFS
Flanschseiteflange side
RR
Rotationsachse der SchleifscheibeAxis of rotation of the grinding wheel
NPNP
Nullposition des TiefenanschlagsDepth stop zero position
SPSP
Spannmutterseiteclamping nut side
SBSB
Sektorbereichsector area
STST
Stirnbereichforehead area
TT
Tangentialrichtungtangential direction
UGUG
Untergrundunderground

Claims (13)

  1. Dust hood (100) having a flange (90) for fastening the dust hood (100) to a gear neck (210) of a cut-off grinder (200), and having a hood body (10) for at least partially covering a circular cut-off wheel (220) on both sides, and having an extraction port (40) via which abrasively removed substrate can be extracted from the hood body (10), wherein the dust hood (100) has a depth stop (80), by means of which a cutting depth of the cut-off wheel (220) can be delimited,
    characterized in that
    the depth stop (80) is mounted on the flange side of the hood body (10) via a one-arm mount (81), and
    wherein the hood body (10) comprises a main extraction duct (50), wherein the main extraction duct (50) is subdivided into two suction chambers (30, 30') by a hood web (20).
  2. Dust hood (100) according to one of the preceding claims,
    characterized in that the one-arm mount (81) has a bearing ring (83), which annularly encloses the flange (90).
  3. Dust hood (100) according to either of the preceding claims,
    characterized in that the connection flange (90) is integrally moulded on the hood body (10).
  4. Dust hood (100) according to one of the preceding claims,
    characterized in that the depth stop (80) is formed in one piece with the one-arm mount (81) and the bearing ring (83).
  5. Dust hood (100) according to one of the preceding claims,
    characterized in that the depth stop (80) is designed as a hood in the form of a sector of a circle.
  6. Dust hood (100) according to one of the preceding claims,
    characterized in that the depth stop (80) is guided on an end face (15) of the hood body (10) and/or the depth stop (80) at least partially engages around an end face (15) of the hood body (10).
  7. Dust hood (100) according to one of the preceding claims,
    characterized in that the depth stop (80) consists of plastic.
  8. Dust hood (100) according to one of the preceding claims,
    characterized in that the depth stop (80) has a position-retaining means (87), which in particular comprises a spring element (89) incorporated in the depth stop (80).
  9. Dust hood (100) according to one of the preceding claims,
    characterized in that the depth stop (80) can be height-adjusted exclusively by rotation about the axis of rotation (R) of the cut-off wheel (220).
  10. Dust hood (100) according to one of the preceding claims,
    characterized in that the depth stop (80) is free of a linear guide.
  11. Dust hood (100) according to one of the preceding claims,
    characterized in that in the hood body (10) there is formed a main extraction duct (50), which is connected to the extraction port (40) and extends tangentially with respect to the cut-off wheel (220).
  12. Dust hood (100) according to one of the preceding claims,
    characterized in that the two suction chambers (30, 30') are symmetrical in relation to one another.
  13. Cut-off grinder (200) having a gear neck (210) and having a dust hood (100) according to one of the preceding claims, wherein the dust hood (100) is arranged or intended to be arranged on the gear neck (210) by means of its flange (90).
EP17809211.0A 2016-12-06 2017-11-16 Dust hood for an angle grinder Active EP3551379B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16202353.5A EP3332908A1 (en) 2016-12-06 2016-12-06 Dust hood for an angle grinder
PCT/EP2017/079433 WO2018104018A1 (en) 2016-12-06 2017-11-16 Dust cover for a cutting grinder

Publications (2)

Publication Number Publication Date
EP3551379A1 EP3551379A1 (en) 2019-10-16
EP3551379B1 true EP3551379B1 (en) 2023-01-04

Family

ID=57544225

Family Applications (2)

Application Number Title Priority Date Filing Date
EP16202353.5A Withdrawn EP3332908A1 (en) 2016-12-06 2016-12-06 Dust hood for an angle grinder
EP17809211.0A Active EP3551379B1 (en) 2016-12-06 2017-11-16 Dust hood for an angle grinder

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP16202353.5A Withdrawn EP3332908A1 (en) 2016-12-06 2016-12-06 Dust hood for an angle grinder

Country Status (2)

Country Link
EP (2) EP3332908A1 (en)
WO (1) WO2018104018A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112605764A (en) * 2021-01-11 2021-04-06 石家庄泽裕科技有限公司 Fitment is with marble slab thicknessing grinding device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6048260A (en) * 1999-07-01 2000-04-11 Roto-Zip Tool Corporation Angle attachment for power tool
KR101635073B1 (en) * 2014-02-21 2016-07-04 삼성중공업 주식회사 Cutting device capable of adjusting cutting depth
JP6316709B2 (en) * 2014-08-28 2018-04-25 株式会社マキタ Tip tool cover and power tool

Also Published As

Publication number Publication date
EP3332908A1 (en) 2018-06-13
EP3551379A1 (en) 2019-10-16
WO2018104018A1 (en) 2018-06-14

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