EP3551382B1 - Dust hood for a grinding device - Google Patents

Dust hood for a grinding device Download PDF

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Publication number
EP3551382B1
EP3551382B1 EP17808813.4A EP17808813A EP3551382B1 EP 3551382 B1 EP3551382 B1 EP 3551382B1 EP 17808813 A EP17808813 A EP 17808813A EP 3551382 B1 EP3551382 B1 EP 3551382B1
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EP
European Patent Office
Prior art keywords
hood
sector
web
dust hood
dust
Prior art date
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Active
Application number
EP17808813.4A
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German (de)
French (fr)
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EP3551382A1 (en
Inventor
Sarah HARDER
Oliver Ohlendorf
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Hilti AG
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Hilti AG
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Publication of EP3551382A1 publication Critical patent/EP3551382A1/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
    • B24B55/06—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
    • 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
    • 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

Definitions

  • the present invention relates to a dust hood for a grinding device equipped with a gear neck for fastening the dust hood.
  • the dust hood is equipped with a hood body to cover a major part of the grinding wheel on one side.
  • the dust hood has a hood sector which is displaceable in the circumferential direction of the hood body and which is provided for gradually covering and releasing a remaining part of the grinding wheel as required.
  • the dust hood has a suction connection which can be used to extract any subsurface material from the hood body.
  • a web is provided between the hood body and the hood sector which at least partially separates a main chamber defined by the hood body from a segment chamber defined by the hood sector.
  • Dust hoods of the type mentioned are basically known from the prior art, see for example document DE102012001925 A1 which discloses the preamble of claim 1. They serve to prevent the spread of dust during grinding work in order to protect the health of a user of the grinding device.
  • the invention is achieved in that the web has a web opening through which air can flow from the segment chamber into the main chamber.
  • the invention includes the knowledge that in the case of dust hoods of the prior art, more precisely in their displaceable hood sectors, there is too little negative pressure in the suction operation and thus the hood sector is not “flushed” enough. This is particularly the case when the hood body or the hood sector is sealed off from the surroundings by a comparatively tight curtain, for example a brush curtain. It has been observed that this prevents an optimal flow in the movable or rotatable hood sector.
  • the web has at least one web opening through which air can flow from the segment chamber into the main chamber.
  • the suction connection is connected to the hood body via a connection socket.
  • the connection socket is preferably oriented tangentially to the grinding wheel and / or the connection socket defines a suction channel running tangentially to the grinding wheel. It has been found to be advantageous if the web opening formed on the web is aligned with the connection socket. Such an alignment can lie in a wheel plane of the grinding wheel or a plane parallel to it.
  • the web has an overall length and the third of the total length closest to the connection socket has one or more web openings. It is particularly advantageous if the web has a total length and only the third of the total length closest to the connection socket has one or more web openings.
  • a sector opening is formed in a surface of the hood sector, through which the ambient air can flow into the segment chamber.
  • This surface of the hood sector is preferably oriented perpendicular to the axis of rotation of the grinding wheel, in other words a surface normal of the surface of the hood sector is preferably parallel to the axis of rotation of the grinding wheel. It was recognized that by providing one or more sector openings in the surface of the hood sector, in particular the surface of the hood sector facing the grinding device, flushing of the hood sector and, immediately afterwards, the hood body can be further improved.
  • the web opening formed in the web and the sector opening formed in the hood sector act with one another in a synergetic manner.
  • the sector opening is particularly preferably arranged to the right of a connection socket of the suction connection, based on the direction of rotation of the grinding wheel and from the point of view of the grinding device.
  • the hood sector has an outer sector length which, starting from the axis of rotation of the grinding wheel, defines a sector of a circle, the sector opening being located in one third, preferably only in the third of the sector of the circle that is the greatest distance from the connection base.
  • a minimum distance between the sector opening and the axis of rotation of the grinding wheel can be greater than four fifths of the largest diameter of the hood body.
  • the web extends vertically in the direction of the axis of rotation of the grinding wheel.
  • the web can predominantly be located on the side of the grinding wheel facing the grinding device.
  • the web is particularly preferably fixed to the hood body.
  • the web can be stationary in relation to the displaceable hood sector. Both a web on the hood body and a corresponding web on the hood sector can be provided.
  • At least one passage opening is formed in a surface of the hood body facing the grinding device, through which the ambient air can flow into the hood body.
  • the through-opening is preferably arranged to the right of a connection socket of the suction connection, based on the direction of rotation of the grinding wheel and from the point of view of the grinding device.
  • the dust hood is equipped with a curtain running along a circumference of the hood body for sealing the hood body at least in sections against a substrate to be processed by means of the grinding wheel.
  • a curtain can also be provided in the hood sector.
  • the curtain and / or the curtains are preferably designed as brush curtains.
  • the object is also achieved by a grinding device with a gear neck and with a dust hood of the type described above, the dust hood being or to be arranged on the gear neck.
  • FIG Fig. 1 A preferred embodiment of a dust hood 100 according to the invention is shown in FIG Fig. 1 shown.
  • the dust hood 100 is equipped with a hood body 10 for covering a predominant part of a grinding wheel on one side (see the indicated grinding wheel 220 in FIG Fig. 3 ).
  • the dust hood 100 has a hood sector 20 which is displaceable, more precisely rotatable, in the circumferential direction U of the hood body 10 along the hood body 10. If necessary, a remaining part of the grinding wheel can be gradually covered and / or released by means of the hood sector 20.
  • the dust hood 100 has a suction connection 40, via which a subsurface material can be extracted from the hood body 10. Between the hood body 10 and the hood sector 20, a web 50 is provided which at least partially separates a main chamber 15 defined by the hood body 10 from a segment chamber 25 which is defined by the hood sector 20.
  • three web openings 55 are formed in the web 50 (see also FIG Fig. 2 ) can flow into the main chamber 15 via the air L from the segment chamber 25.
  • the suction connection 40 is connected to the hood body 10 via a connection base 45 which is oriented in the tangential direction T to the grinding wheel.
  • the web openings 55 are aligned with the connection base 45.
  • alignment means, on the one hand, that the web openings 55 themselves are located in a tangential alignment, viewed from the connection base 45.
  • this particular is off Fig. 2
  • the shape of the web openings 55 within the web 50 itself can be clearly seen in alignment with the tangentially extending connection socket 45. In FIG Fig. 2 The illustrated embodiment, the flanks of the web openings at an angle of approximately 45 degrees.
  • Fig. 1 It can again be clearly seen that the web 50 intersects the hood body 10 in the sense of a secant.
  • the web 50 has an overall length GL. Only in the third 1/3 GL closest to the connection socket 45 are there exactly three web openings.
  • hood sector 20 In the hood sector 20 (in the upper area of the Fig. 1 ) three sector openings 23 can be seen, which are located in a surface OS (cf. Fig. 4 ) of the hood sector 20 are formed. Ambient air UL can flow into the segment chamber 25 via these sector openings 23.
  • Fig. 2 illustrated embodiment are those with reference to Fig. 1
  • the web openings 55 described, through which air L can flow from the segment chamber 25 into the main chamber 15, can be seen particularly well.
  • the dust hood 100 of the Fig. 2 is equipped with a curtain 30 running along a circumference U of the hood body 10 for at least partially sealing off the hood body 10 against a substrate to be processed by means of the grinding wheel.
  • a curtain 30 ' is also provided in the hood sector 20.
  • the curtains 30, 30 ' are designed as brush curtains.
  • the illustrated embodiment are in a surface OF the hood body facing the grinding device (in Fig. 2 shown in dashed lines, since five through openings 13 are formed on the rear side, through which ambient air UL can flow into the hood body 10. These through openings 13 ensure additional air pressure equalization within the dust hood.
  • Fig. 3 now shows the dust hood 100 of Fig. 1 , which is arranged on a grinding device 200 (shown schematically).
  • the grinding device 200 has a gear neck 210 for fastening the dust hood 100.
  • the grinding wheel 220 indicated schematically here is set in rotation via the drive spindle 230, specifically in the direction of rotation DR about the axis of rotation R of the grinding wheel 220.
  • the web 50 extends vertically in the direction of the axis of rotation R of the grinding wheel 220.
  • the web 50 is predominantly located on the side ZS of the grinding wheel 220 facing the grinding device 200.
  • a step 59 formed in the vertical web 50 a remaining part of the grinding wheel 220 can be moved over the web 50 into the displaceable hood sector 20, which for reasons of clarity in FIG Fig. 3 is not shown, protrude.
  • Fig. 4 can also be removed, the sector openings 23, based on the direction of rotation DR of the grinding wheel and from the perspective of the grinding device, are arranged to the right of the connection socket 45 of the suction connection 40.
  • the hood sector 20 has an outer sector length SL which, starting from the axis of rotation R of the grinding wheel 220 (in Fig. 4 indicated by the arcuate dash-dot line) defines a circular sector KS.
  • the three sector openings 23 are only located in the third of the circular sector KS which, in total, has the greatest distance from the connection base 45. In the exemplary embodiment shown here, this is the right third, a third KS, which is approximately opposite the connection socket 45.
  • a minimum distance MA between the sector opening 23 and the axis of rotation R of the grinding wheel 220 is greater than approximately four fifths of the largest diameter GD of the hood body 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Description

Die vorliegende Erfindung betrifft eine Staubhaube für ein mit einem Getriebehals zur Befestigung der Staubhaube ausgestatteten Schleifgerät. Die Staubhaube ist ausgestattet mit einem Haubenkörper zum einseitigen Abdecken eines überwiegenden Teils der Schleifscheibe. Die Staubhaube weist einen in Umfangsrichtung des Haubenkörpers entlang des Haubenkörpers verschiebbaren Haubensektor auf, der zum bedarfsweisen graduellen Abdecken und Freigeben eines verbleibenden Teils der Schleifscheibe vorgesehen ist. Die Staubhaube verfügt über einen Absauganschluss über den ein Untergrundabtrag aus dem Haubenkörper abgesaugt werden kann. Zwischen dem Haubenkörper und dem Haubensektor ist ein Steg vorgesehen, der eine durch den Haubenkörper definierte Hauptkammer zumindest teilweise von einer Segmentkammer, die durch den Haubensektor definiert ist, trennt.The present invention relates to a dust hood for a grinding device equipped with a gear neck for fastening the dust hood. The dust hood is equipped with a hood body to cover a major part of the grinding wheel on one side. The dust hood has a hood sector which is displaceable in the circumferential direction of the hood body and which is provided for gradually covering and releasing a remaining part of the grinding wheel as required. The dust hood has a suction connection which can be used to extract any subsurface material from the hood body. A web is provided between the hood body and the hood sector which at least partially separates a main chamber defined by the hood body from a segment chamber defined by the hood sector.

Staubhauben der eingangs genannten Art sind grundsätzlich aus dem Stand der Technik bekannt, siehe z.B. Dokument DE102012001925 A1 , das den Oberbegriff des Anspruchs 1 offenbart. Sie dienen der Vermeidung einer Staubausbreitung bei Schleifarbeiten, um die Gesundheit eines Benutzers des Schleifgeräts zu schützen.Dust hoods of the type mentioned are basically known from the prior art, see for example document DE102012001925 A1 which discloses the preamble of claim 1. They serve to prevent the spread of dust during grinding work in order to protect the health of a user of the grinding device.

Es ist Aufgabe der vorliegenden Erfindung, eine Staubhaube bereitzustellen, die ein verbessertes Absaugverhalten bietet.It is the object of the present invention to provide a dust hood which offers improved suction behavior.

Die Erfindung wird dadurch gelöst, dass der Steg eine Stegöffnung aufweist, über die Luft von der Segmentkammer in die Hauptkammer einströmen kann.The invention is achieved in that the web has a web opening through which air can flow from the segment chamber into the main chamber.

Die Erfindung schließt die Erkenntnis ein, dass bei Staubhauben des Standes der Technik, genauer gesagt in deren verschiebbaren Haubensektoren, im Absaugbetrieb ein zu geringer Unterdruck herrscht und somit der Haubensektor zu wenig "durchspült" wird. Dies ist insbesondere der Fall, wenn der Haubenkörper, bzw. der Haubensektor, durch einen vergleichsweise dichten Vorhang, beispielsweise einen Bürstenvorhangs, zur Umgebung abgedichtet sind. Es wurde beobachtet, dass dies eine optimale Strömung im verschiebbaren bzw. drehbaren Haubensektor verhindert.The invention includes the knowledge that in the case of dust hoods of the prior art, more precisely in their displaceable hood sectors, there is too little negative pressure in the suction operation and thus the hood sector is not “flushed” enough. This is particularly the case when the hood body or the hood sector is sealed off from the surroundings by a comparatively tight curtain, for example a brush curtain. It has been observed that this prevents an optimal flow in the movable or rotatable hood sector.

In Abkehr zum Stand der Technik weist der Steg wenigstens eine Stegöffnung auf, über die Luft von der Segmentkammer in die Hauptkammer einströmen kann. Dadurch wird eine verbesserte Unterdrucksituation im Haubensektor geschaffen und insbesondere bei niedrigem Absaugvolumenstrom eine Absaugung des Untergrundabtrags (Staub) aus dem Haubensektor verbessert. Es hat sich gezeigt, dass eine solche erfindungsgemäß ausgestattete Staubhaube sowohl im Zusammenhang mit Bürstenvorhängen als auch Lamellenvorhängen ein verbessertes Absaugverhalten bietet.In a departure from the prior art, the web has at least one web opening through which air can flow from the segment chamber into the main chamber. This creates an improved negative pressure situation in the hood sector and, in particular when the suction volume flow is low, the subsoil material (dust) is extracted from the hood sector improved. It has been shown that such a dust hood equipped according to the invention offers improved suction behavior both in connection with brush curtains and lamellar curtains.

In einer bevorzugten Ausgestaltung ist der Absauganschluss über einen Anschlusssockel mit dem Haubenkörper verbunden. Vorzugsweise ist der Anschlusssockel tangential zur Schleifscheibe orientiert und/oder definiert der Anschlusssockel einen tangential zur Schleifscheibe verlaufenden Absaugkanal. Es hat sich als vorteilhaft herausgestellt, wenn die am Steg ausgebildete Stegöffnung mit dem Anschlusssockel fluchtet. Eine solche Flucht kann in einer Scheibenebene der Schleifscheibe oder einer dazu parallelen Ebene liegen.In a preferred embodiment, the suction connection is connected to the hood body via a connection socket. The connection socket is preferably oriented tangentially to the grinding wheel and / or the connection socket defines a suction channel running tangentially to the grinding wheel. It has been found to be advantageous if the web opening formed on the web is aligned with the connection socket. Such an alignment can lie in a wheel plane of the grinding wheel or a plane parallel to it.

Es hat sich als vorteilhaft herausgestellt, wenn der Steg eine Gesamtlänge aufweist und das dem Anschlusssockel nächstliegende Drittel der Gesamtlänge ein oder mehrere Stegöffnungen aufweist. Besonders vorteilhaft ist es, wenn der Steg eine Gesamtlänge aufweist, und lediglich das dem Anschlusssockel nächstliegende Drittel der Gesamtlänge eine oder mehrere Stegöffnungen aufweist.It has been found to be advantageous if the web has an overall length and the third of the total length closest to the connection socket has one or more web openings. It is particularly advantageous if the web has a total length and only the third of the total length closest to the connection socket has one or more web openings.

In einer besonders bevorzugten Ausgestaltung der Staubhaube ist in einer Oberfläche des Haubensektors eine Sektoröffnung ausgebildet, über die Umgebungsluft in die Segmentkammer einströmen kann. Vorzugsweise ist diese Oberfläche des Haubensektors senkrecht zur Rotationsachse der Schleifscheibe orientiert, mit anderen Worten steht vorzugsweise eine Flächennormale der Oberfläche des Haubensektors parallel zur Rotationsachse der Schleifscheibe. Es wurde erkannt, dass durch das Vorsehen ein oder mehrerer Sektoröffnungen in der Oberfläche des Haubensektors, insbesondere der dem Schleifgerät zugewandten Oberfläche des Haubensektors, eine Durchspülung des Haubensektors und in unmittelbarer Folge des Haubenkörpers weiter verbessert werden kann. Dabei wirken die im Steg ausgebildete Stegöffnung und die im Haubensektor ausgebildete Sektoröffnung miteinander in synergetischer Weise.In a particularly preferred embodiment of the dust hood, a sector opening is formed in a surface of the hood sector, through which the ambient air can flow into the segment chamber. This surface of the hood sector is preferably oriented perpendicular to the axis of rotation of the grinding wheel, in other words a surface normal of the surface of the hood sector is preferably parallel to the axis of rotation of the grinding wheel. It was recognized that by providing one or more sector openings in the surface of the hood sector, in particular the surface of the hood sector facing the grinding device, flushing of the hood sector and, immediately afterwards, the hood body can be further improved. The web opening formed in the web and the sector opening formed in the hood sector act with one another in a synergetic manner.

Besonders bevorzugt ist die Sektoröffnung, bezogen auf die Drehrichtung der Schleifscheibe und aus Sicht des Schleifgeräts, rechts von einem Anschlusssockel des Absauganschlusses angeordnet.The sector opening is particularly preferably arranged to the right of a connection socket of the suction connection, based on the direction of rotation of the grinding wheel and from the point of view of the grinding device.

Ebenfalls vorteilhaft ist, wenn der Haubensektor eine äußere Sektorlänge aufweist, die ausgehend von der Rotationsachse der Schleifscheibe einen Kreissektor definiert, wobei die Sektoröffnung in einem Drittel, vorzugsweise lediglich in dem Drittel des Kreissektors gelegen ist, der in Summe den größten Abstand zum Anschlusssockel aufweist.It is also advantageous if the hood sector has an outer sector length which, starting from the axis of rotation of the grinding wheel, defines a sector of a circle, the sector opening being located in one third, preferably only in the third of the sector of the circle that is the greatest distance from the connection base.

Alternativ oder zusätzlich kann ein minimaler Abstand zwischen Sektoröffnung und Rotationsachse der Schleifscheibe größer sein, als vier Fünftel des größten Durchmessers des Haubenkörpers.Alternatively or in addition, a minimum distance between the sector opening and the axis of rotation of the grinding wheel can be greater than four fifths of the largest diameter of the hood body.

Vorteilhaft ist, wenn sich der Steg, in Richtung der Rotationsachse der Schleifscheibe, vertikal erstreckt. Der Steg kann sich, wenn die Schleifscheibe in der Staubhaube aufgenommen ist, überwiegend auf der dem Schleifgerät zugewandten Seite der Schleifscheibe befinden. Besonders bevorzugt ist der Steg ortsfest zum Haubenkörper. Alternativ kann der Steg ortsfest zum verschiebbaren Haubensektor sein. Es kann sowohl ein Steg am Haubenkörper als auch ein korrespondierender Steg am Haubensektor vorgesehen sein.It is advantageous if the web extends vertically in the direction of the axis of rotation of the grinding wheel. When the grinding wheel is accommodated in the dust hood, the web can predominantly be located on the side of the grinding wheel facing the grinding device. The web is particularly preferably fixed to the hood body. Alternatively, the web can be stationary in relation to the displaceable hood sector. Both a web on the hood body and a corresponding web on the hood sector can be provided.

Es hat sich als vorteilhaft herausgestellt, wenn in einer dem Schleifgerät zugewandte Oberfläche des Haubenkörpers wenigstens eine Durchgangsöffnung ausgebildet ist, über die Umgebungsluft in den Haubenkörper einströmen kann. Vorzugsweise ist die Durchgangsöffnung, bezogen auf die Drehrichtung der Schleifscheibe und aus Sicht des Schleifgeräts, rechts von einem Anschlusssockel des Absauganschlusses angeordnet.It has been found to be advantageous if at least one passage opening is formed in a surface of the hood body facing the grinding device, through which the ambient air can flow into the hood body. The through-opening is preferably arranged to the right of a connection socket of the suction connection, based on the direction of rotation of the grinding wheel and from the point of view of the grinding device.

Es hat sich als vorteilhaft herausgestellt, wenn die Staubhaube ausgestattet ist mit einem entlang eines Umfangs des Haubenkörpers verlaufenden Vorhang zum zumindest abschnittsweisen Abdichten des Haubenkörpers gegenüber eines mittels der Schleifscheibe zu bearbeitenden Untergrunds. Im Haubensektor kann ebenfalls ein Vorhang vorgesehen sein. Vorzugsweise ist der Vorhang und/oder sind die Vorhänge als Bürstenvorhänge ausgebildet. Die Aufgabe wird ebenfalls gelöst durch ein Schleifgerät mit einem Getriebehals und mit einer Staubhaube der vorbeschriebenen Art, wobei die Staubhaube am Getriebehals angeordnet, bzw. anzuordnen ist.It has been found to be advantageous if the dust hood is equipped with a curtain running along a circumference of the hood body for sealing the hood body at least in sections against a substrate to be processed by means of the grinding wheel. A curtain can also be provided in the hood sector. The curtain and / or the curtains are preferably designed as brush curtains. The object is also achieved by a grinding device with a gear neck and with a dust hood of the type described above, the dust hood being or to be arranged on the gear neck.

Weitere Vorteile ergeben sich aus der folgenden Figurenbeschreibung. In den Figuren sind verschiedene Ausführungsbeispiele der vorliegenden Erfindung dargestellt. Mögliche Merkmalkombinationen sind in den beigefügten abhängigen Ansprüchen definiert.Further advantages emerge from the following description of the figures. Various exemplary embodiments of the present invention are shown in the figures. Possible combinations of features are defined in the attached dependent claims.

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

Es zeigen:

Fig. 1
ein bevorzugtes Ausführungsbeispiel einer erfindungsgemäßen Staubhaube in Unteransicht;
Fig. 2
ein weiteres bevorzugtes Ausführungsbeispiel einer erfindungsgemäßen Staubhaube aus Sicht des Schleifgeräts;
Fig. 3
das Ausführungsbeispiel der Figur 1 angeordnet an einem Schleifgerät; und
Fig. 4
eine Draufsicht auf das Ausführungsbeispiel der Staubhaube der Figuren 1 und 3.
Show it:
Fig. 1
a preferred embodiment of a dust hood according to the invention in bottom view;
Fig. 2
another preferred embodiment of a dust hood according to the invention from the point of view of the grinding device;
Fig. 3
the embodiment of Figure 1 arranged on a grinder; and
Fig. 4
a plan view of the embodiment of the dust hood of Figures 1 and 3 .

Ausführungsbeispiel:Embodiment:

Ein bevorzugtes Ausführungsbeispiel einer erfindungsgemäßen Staubhaube 100 ist in Fig. 1 dargestellt. Die Staubhaube 100 ist ausgestattet mit einem Haubenkörper 10 zum einseitigen Abdecken eines überwiegenden Teils einer Schleifscheibe (vgl. angedeutete Schleifscheibe 220 in Fig. 3). Die Staubhaube 100 weist ein in Umfangsrichtung U des Haubenkörpers 10 entlang des Haubenkörpers 10 verschiebbaren, genauer gesagt drehbaren Haubensektor 20 auf. Mittels des Haubensektors 20 kann bedarfsweise ein verbleibender Teil der Schleifscheibe graduell abgedeckt und/oder freigegeben werden.A preferred embodiment of a dust hood 100 according to the invention is shown in FIG Fig. 1 shown. The dust hood 100 is equipped with a hood body 10 for covering a predominant part of a grinding wheel on one side (see the indicated grinding wheel 220 in FIG Fig. 3 ). The dust hood 100 has a hood sector 20 which is displaceable, more precisely rotatable, in the circumferential direction U of the hood body 10 along the hood body 10. If necessary, a remaining part of the grinding wheel can be gradually covered and / or released by means of the hood sector 20.

Die Staubhaube 100 weist einen Absauganschluss 40 auf, über den ein Untergrundabtrag aus dem Haubenkörper 10 abgesaugt werden kann. Zwischen Haubenkörper 10 und dem Haubensektor 20 ist ein Steg 50 vorgesehen, der eine durch den Haubenkörper 10 definierte Hauptkammer 15 zumindest teilweise von einer Segmentkammer 25, die durch den Haubensektor 20 definiert ist, trennt.The dust hood 100 has a suction connection 40, via which a subsurface material can be extracted from the hood body 10. Between the hood body 10 and the hood sector 20, a web 50 is provided which at least partially separates a main chamber 15 defined by the hood body 10 from a segment chamber 25 which is defined by the hood sector 20.

Im Steg 50 sind im vorliegend dargestellten Ausführungsbeispiel drei Stegöffnungen 55 ausgebildet (vgl. auch Fig. 2) über die Luft L von der Segmentkammer 25 in die Hauptkammer 15 einströmen kann.In the exemplary embodiment shown here, three web openings 55 are formed in the web 50 (see also FIG Fig. 2 ) can flow into the main chamber 15 via the air L from the segment chamber 25.

Wie ebenfalls der Fig. 1 entnommen werden kann, ist der Absauganschluss 40 über einen Anschlusssockel 45, der in tangentialer Richtung T zur Schleifscheibe orientiert ist, mit dem Haubenkörper 10 verbunden. Die Stegöffnungen 55 fluchten mit dem Anschlusssockel 45. In Bezug auf das vorliegend dargestellte Ausführungsbeispiel bedeutet Fluchten zum einen, dass die Stegöffnungen 55 selbst in einer tangentialen Flucht, gesehen vom Anschlusssockel 45 aus, gelegen sind. Darüber hinaus, dies ist insbesondere aus Fig. 2 gut ersichtlich, sind die Stegöffnungen 55 in ihrer Ausprägung innerhalb des Stegs 50 selbst fluchtend zum sich tangential erstreckenden Anschlusssockel 45. Im in Fig. 2 dargestellten Ausführungsbeispiel weisen die Flanken der Stegöffnungen einen Winkel von etwa 45 Grad auf.Like that too Fig. 1 can be removed, the suction connection 40 is connected to the hood body 10 via a connection base 45 which is oriented in the tangential direction T to the grinding wheel. The web openings 55 are aligned with the connection base 45. With regard to the exemplary embodiment shown here, alignment means, on the one hand, that the web openings 55 themselves are located in a tangential alignment, viewed from the connection base 45. In addition, this particular is off Fig. 2 The shape of the web openings 55 within the web 50 itself can be clearly seen in alignment with the tangentially extending connection socket 45. In FIG Fig. 2 The illustrated embodiment, the flanks of the web openings at an angle of approximately 45 degrees.

In Fig. 1 wiederum gut zu erkennen ist, dass der Steg 50 den Haubenkörper 10 im Sinne einer Sekante schneidet. Dabei weist der Steg 50 eine Gesamtlänge GL auf. Lediglich in dem, dem Anschlusssockel 45 nächstliegenden Drittel 1/3 GL sind die genau drei Stegöffnungen befindlich.In Fig. 1 It can again be clearly seen that the web 50 intersects the hood body 10 in the sense of a secant. The web 50 has an overall length GL. Only in the third 1/3 GL closest to the connection socket 45 are there exactly three web openings.

Im Haubensektor 20 (im oberen Bereich der Fig. 1) sind drei Sektoröffnungen 23 erkennbar, die in einer Oberfläche OS (vgl. Fig. 4) des Haubensektors 20 ausgebildet sind. Über diese Sektoröffnungen 23 kann Umgebungsluft UL in die Segmentkammer 25 einströmen.In the hood sector 20 (in the upper area of the Fig. 1 ) three sector openings 23 can be seen, which are located in a surface OS (cf. Fig. 4 ) of the hood sector 20 are formed. Ambient air UL can flow into the segment chamber 25 via these sector openings 23.

Im in Fig. 2 dargestellten Ausführungsbeispiel sind die mit Bezug auf Fig. 1 beschriebenen Stegöffnungen 55, über die Luft L von der Segmentkammer 25 in die Hauptkammer 15 einströmen kann, besonders gut zu erkennen.Im in Fig. 2 illustrated embodiment are those with reference to Fig. 1 The web openings 55 described, through which air L can flow from the segment chamber 25 into the main chamber 15, can be seen particularly well.

Die Staubhaube 100 der Fig. 2 ist ausgestattet mit einem entlang eines Umfangs U des Haubenkörpers 10 verlaufenden Vorhang 30 zum zumindest abschnittsweisen Abdichten des Haubenkörpers 10 gegenüber eines Mittels der Schleifscheibe zu bearbeitenden Untergrunds. Auch im Haubensektor 20 ist ein Vorhang 30' vorgesehen. Im vorliegend dargestellten Ausführungsbeispiel sind die Vorhänge 30, 30' als Bürstenvorhänge ausgebildet.The dust hood 100 of the Fig. 2 is equipped with a curtain 30 running along a circumference U of the hood body 10 for at least partially sealing off the hood body 10 against a substrate to be processed by means of the grinding wheel. A curtain 30 'is also provided in the hood sector 20. In the exemplary embodiment shown here, the curtains 30, 30 'are designed as brush curtains.

Abweichend zu dem in Fig. 1 dargestellten Ausführungsbeispiel sind in einer dem Schleifgerät zugewandten Oberfläche OF des Haubenkörpers (in Fig. 2 gestrichelt dargestellt, da auf der Rückseite befindlich) fünf Durchgangsöffnungen 13 ausgebildet, über die Umgebungsluft UL in den Haubenkörper 10 einströmen kann. Diese Durchgangsöffnungen 13 sorgen für einen zusätzlichen Luftdruckausgleich innerhalb der Staubhaube.In contrast to the in Fig. 1 The illustrated embodiment are in a surface OF the hood body facing the grinding device (in Fig. 2 shown in dashed lines, since five through openings 13 are formed on the rear side, through which ambient air UL can flow into the hood body 10. These through openings 13 ensure additional air pressure equalization within the dust hood.

Fig. 3 zeigt nunmehr die Staubhaube 100 der Fig. 1, die an einem Schleifgerät 200 (schematisch dargestellt) angeordnet ist. Das Schleifgerät 200 weist einen Getriebehals 210 zur Befestigung der Staubhaube 100 auf. Im Schleifbetrieb wird die hier schematisch angedeutete Schleifscheibe 220 über die Antriebsspindel 230 in Rotation versetzt, und zwar in Drehrichtung DR um die Rotationsachse R der Schleifscheibe 220. Fig. 3 now shows the dust hood 100 of Fig. 1 , which is arranged on a grinding device 200 (shown schematically). The grinding device 200 has a gear neck 210 for fastening the dust hood 100. In the grinding operation, the grinding wheel 220 indicated schematically here is set in rotation via the drive spindle 230, specifically in the direction of rotation DR about the axis of rotation R of the grinding wheel 220.

Wie der Fig. 3 gut entnommen werden kann, erstreckt sich der Steg 50, in Richtung der Rotationsachse R der Schleifscheibe 220, vertikal. Dabei ist der Steg 50, wenn die Schleifscheibe 220 in der Staubhaube 100 aufgenommen ist, überwiegend auf der dem Schleifgerät 200 zugewandten Seite ZS der Schleifscheibe 220 befindlich. Durch eine in dem vertikalen Steg 50 ausgebildete Abstufung 59 kann ein verbleibender Teil der Schleifscheibe 220 über den Steg 50 hinweg in den verschiebbaren Haubensektor 20, der aus Gründen der Deutlichkeit in Fig. 3 nicht dargestellt ist, hineinragen.Again Fig. 3 can be easily removed, the web 50 extends vertically in the direction of the axis of rotation R of the grinding wheel 220. When the grinding wheel 220 is accommodated in the dust hood 100, the web 50 is predominantly located on the side ZS of the grinding wheel 220 facing the grinding device 200. By means of a step 59 formed in the vertical web 50, a remaining part of the grinding wheel 220 can be moved over the web 50 into the displaceable hood sector 20, which for reasons of clarity in FIG Fig. 3 is not shown, protrude.

Aus Fig. 3 ist gut ersichtlich, dass der Steg 50 ortsfest zum Haubenkörper 10 angeordnet ist.Out Fig. 3 it can be clearly seen that the web 50 is arranged in a stationary manner relative to the hood body 10.

Mit Bezug auf Fig. 4 soll im Folgenden die geometrische Anordnung der Sektoröffnungen 23 genauer beschrieben werden.Regarding Fig. 4 The geometric arrangement of the sector openings 23 is to be described in more detail below.

Im in Fig. 4 gezeigten Ausführungsbeispiel sind genau drei Sektoröffnungen 23 in einer Oberfläche OS des Haubensektors 20 angeordnet. Über diese Sektoröffnungen 23 kann Umgebungsluft UL in die Segmentkammer 25 (vgl. Fig. 1) einströmen. Bei der Oberfläche OS handelt es sich um die dem Schleifgerät 200 (hier nicht dargestellt) zugewandte Oberfläche OS des Haubensektors 20.Im in Fig. 4 The embodiment shown, exactly three sector openings 23 are arranged in a surface OS of the hood sector 20. Ambient air UL can enter the segment chamber 25 via these sector openings 23 (cf. Fig. 1 ) flow in. The surface OS is the surface OS of the hood sector 20 facing the grinding device 200 (not shown here).

Wie der Fig. 4 ebenfalls entnommen werden kann, sind die Sektoröffnungen 23, bezogen auf die Drehrichtung DR der Schleifscheibe und aus Sicht des Schleifgeräts, rechts von dem Anschlusssockel 45 des Absauganschlusses 40 angeordnet.Again Fig. 4 can also be removed, the sector openings 23, based on the direction of rotation DR of the grinding wheel and from the perspective of the grinding device, are arranged to the right of the connection socket 45 of the suction connection 40.

Dabei weist der Haubensektor 20 eine äußere Sektorlänge SL auf, die ausgehend von der Rotationsachse R der Schleifscheibe 220 (in Fig. 4 angedeutet durch die bogenförmige Strichpunktlinie) einen Kreissektor KS definiert. Die drei Sektoröffnungen 23 sind lediglich in dem Drittel des Kreissektors KS gelegen, der in Summe den größten Abstand zum Anschlusssockel 45 aufweist. Im vorliegend dargestellten Ausführungsbeispiel ist dies das rechte Drittel, ein Drittel KS, das dem Anschlusssockel 45 etwa gegenüberliegt.The hood sector 20 has an outer sector length SL which, starting from the axis of rotation R of the grinding wheel 220 (in Fig. 4 indicated by the arcuate dash-dot line) defines a circular sector KS. The three sector openings 23 are only located in the third of the circular sector KS which, in total, has the greatest distance from the connection base 45. In the exemplary embodiment shown here, this is the right third, a third KS, which is approximately opposite the connection socket 45.

Wie ebenfalls der Fig. 4 entnommen werden kann, ist ein minimaler Abstand MA zwischen Sektoröffnung 23 und Rotationsachse R der Schleifscheibe 220 größer, als etwa vier Fünftel des größten Durchmessers GD des Haubenkörpers 10.Like that too Fig. 4 can be seen, a minimum distance MA between the sector opening 23 and the axis of rotation R of the grinding wheel 220 is greater than approximately four fifths of the largest diameter GD of the hood body 10.

BezugszeichenlisteList of reference symbols

1010
HaubenkörperHood body
1313
DurchgangsöffnungThrough opening
1515th
HauptkammerMain chamber
2020th
verschiebbarer Haubensektorsliding hood sector
2323
SektoröffnungSector opening
30, 30'30, 30 '
Vorhangcurtain
4040
AbsauganschlussSuction connection
4545
AnschlusssockelConnection socket
5050
Stegweb
5555
StegöffnungBridge opening
5959
Abstufunggradation
100100
StaubhaubeDust hood
200200
SchleifgerätGrinder
210210
GetriebehalsGear neck
220220
SchleifscheibeGrinding wheel
220'220 '
verbleibender Teil der Schleifscheiberemaining part of the grinding wheel
230230
AntriebsspindelDrive spindle
AA.
axiale Richtungaxial direction
GLGL
Gesamtlänge des StegsTotal length of the bridge
OFOF
Oberfläche des HaubenkörpersSurface of the hood body
OSOS
Oberfläche des HaubensektorsSurface of the hood sector
KSKS
KreissektorDistrict sector
MAMA
minimaler Abstandminimum distance
RR.
RotationsachseAxis of rotation
SLSL
SektorlängeSector length
TT
TangentialrichtungTangential direction
UU
Umfang / UmfangsrichtungCircumference / circumferential direction
UGBasement
UntergrundUnderground
ZGZG
zugewandte Seitefacing side

Claims (12)

  1. Dust hood (100) for a grinding device (200) provided with a gearbox neck (210) for securing the dust hood (100), with a hood body (10) for unilaterally covering a predominant portion of a grinding disc (220), wherein the dust hood (100) has a hood sector (20) which is displaceable along the hood body (10) in the circumferential direction (U) of the hood body (10) and is provided for gradually covering and opening up a remaining part of the grinding disc (220) as required, and with an extraction connection (40), via which material from the abrasive removal of a substrate can be sucked out of the hood body (10), wherein a web (50) is provided between the hood body (10) and the hood sector (20), said web (50) separating a main chamber (15), which is defined by the hood body (10), at least partially from a segment chamber (25), which is defined by the hood sector (20),
    characterized in that the web (50) has a web opening (55) via which air (L) can flow from the segment chamber (25) into the main chamber (15).
  2. Dust hood (100) according to Claim 1,
    characterized in that the extraction connection (40) is connected to the hood body (10) via a connection socket (45), which is oriented tangentially to the grinding disc (220), and the web opening (55) is aligned with the connection socket (45).
  3. Dust hood (100) according to Claim 2,
    characterized in that the web (50) has an overall length (GL), and only that third of the overall length (GL) which is closest to the connection socket (45) has one or more web openings (55).
  4. Dust hood (100) according to one of the preceding claims,
    characterized in that a sector opening (23) via which ambient air (UL) can flow into the segment chamber (25) is formed in a surface (OS) of the hood sector (20).
  5. Dust hood (100) according to Claim 4,
    characterized in that the hood sector (20) has an outer sector length (SL) which defines a sector of a circle (KS) starting from the axis of rotation (R) of the grinding disc (220), wherein the sector opening (23) is placed only in that third of the sector of the circle (KS) which in total is at the greatest distance from the connection socket (45).
  6. Dust hood (100) according to Claim 4 or 5,
    characterized in that a minimum distance (MA) between the sector opening (23) and the axis of rotation (R) of the grinding disc (220) is greater than four fifths of the largest diameter (GD) of the main body (10).
  7. Dust hood (100) according to one of the preceding claims,
    characterized in that the web (50) extends vertically, in the direction of the axis of rotation (R) of the grinding disc (220).
  8. Dust hood (100) according to one of the preceding claims,
    characterized in that the web (50), when the grinding disc (220) is accommodated in the dust hood (100), is predominantly located on that side (ZS) of the grinding disc (220) which faces the grinding device (200).
  9. Dust hood (100) according to one of the preceding claims,
    characterized in that the web (50) is positionally fixed with respect to the hood body (10).
  10. Dust hood (100) according to one of the preceding claims,
    characterized in that at least one through-opening (13) via which ambient air (UL) can flow into the hood body (10) is formed in a surface (OF) of the hood body (10), said surface (OF) facing the grinding device (200).
  11. Dust hood (100) according to one of the preceding claims,
    characterized in that the dust hood (100) is provided with a curtain (30) running along a circumference (U) of the hood body (10), for sealing the hood body (10) at least in sections in relation to a substrate (UG) to be processed by means of the grinding disc (220), wherein a curtain (30') is likewise provided in the hood sector (20).
  12. Grinding device (200) with a gearbox neck (210) and with a dust hood (100) according to one of the preceding claims, wherein the dust hood (100) is arranged or is to be arranged on the gearbox neck (210).
EP17808813.4A 2016-12-06 2017-11-16 Dust hood for a grinding device Active EP3551382B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16202365.9A EP3332910A1 (en) 2016-12-06 2016-12-06 Dust hood for a grinding device
PCT/EP2017/079402 WO2018104016A1 (en) 2016-12-06 2017-11-16 Dust hood for a grinding machine

Publications (2)

Publication Number Publication Date
EP3551382A1 EP3551382A1 (en) 2019-10-16
EP3551382B1 true EP3551382B1 (en) 2020-09-30

Family

ID=57542730

Family Applications (2)

Application Number Title Priority Date Filing Date
EP16202365.9A Withdrawn EP3332910A1 (en) 2016-12-06 2016-12-06 Dust hood for a grinding device
EP17808813.4A Active EP3551382B1 (en) 2016-12-06 2017-11-16 Dust hood for a grinding device

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP16202365.9A Withdrawn EP3332910A1 (en) 2016-12-06 2016-12-06 Dust hood for a grinding device

Country Status (2)

Country Link
EP (2) EP3332910A1 (en)
WO (1) WO2018104016A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114952519A (en) * 2022-06-13 2022-08-30 滁州合一智控有限公司 Hardware polishing and forming equipment

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8523637B2 (en) * 2009-07-21 2013-09-03 Dustless Depot, Llc Angle grinder dust shroud with slideable access hatch
CN202357043U (en) * 2011-11-24 2012-08-01 上海新朋实业股份有限公司 Angle grinder shield structure
DE102012001925A1 (en) * 2012-02-02 2013-08-08 Schleif- und Fräswerkzeuge Höhn Ltd. & Co. KG Surface grinder i.e. hand-held angle grinder, for performing concrete grinding works, has suction hood whose inner side is divided into inner and outer portions, where abrasive dust and sharpening object are sucked-off over outer portion

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2018104016A1 (en) 2018-06-14
EP3332910A1 (en) 2018-06-13
EP3551382A1 (en) 2019-10-16

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