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EP1074341B1 - Dust protective cover for surface grinding tool - Google Patents

Dust protective cover for surface grinding tool Download PDF

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Publication number
EP1074341B1
EP1074341B1 EP20000810526 EP00810526A EP1074341B1 EP 1074341 B1 EP1074341 B1 EP 1074341B1 EP 20000810526 EP20000810526 EP 20000810526 EP 00810526 A EP00810526 A EP 00810526A EP 1074341 B1 EP1074341 B1 EP 1074341B1
Authority
EP
European Patent Office
Prior art keywords
housing
cover
drive shaft
bolt
base member
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.)
Expired - Lifetime
Application number
EP20000810526
Other languages
German (de)
French (fr)
Other versions
EP1074341A3 (en
EP1074341A2 (en
Inventor
Hans Rupprecht
Rolf Spangenberg
Diep Chau-Ngoc
Rudolf Reitberger
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
Original Assignee
Hilti AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Priority to DK00810526T priority Critical patent/DK1074341T3/en
Publication of EP1074341A2 publication Critical patent/EP1074341A2/en
Publication of EP1074341A3 publication Critical patent/EP1074341A3/en
Application granted granted Critical
Publication of EP1074341B1 publication Critical patent/EP1074341B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/727—With means to guide moving work
    • Y10T83/73—Guide fixed to or integral with stationary tool element

Definitions

  • the invention relates to a rotary grinder according to the preamble of the claim 1.
  • This rotary grinder For removing material from surfaces such as concrete, stone or metal, for example, the known from DE-297 17 099 U1 rotary grinder used.
  • This rotary grinder has a housing, as well as a Drive motor with a drive shaft, one arranged at the free end of the drive shaft Grinding wheel and a two-piece, circular dust cover on.
  • the Dust cover covers the grinding wheel towards the housing, as well as completely from.
  • a first part of the dust cover is formed by a body firmly with the housing is in communication.
  • a second part of the dust cover is from a circular section formed cover body formed around a vertically to the longitudinal axis of the drive shaft extending axis pivotally mounted on the main body is determinable. From the main body protrudes an exhaust, through the ablated Abrasive material by means of an external suction device from the dust cover is sucked.
  • a protective hood for a rotary grinder wherein the protective cover is made of a firmly connectable to the housing of the rotary sander Base body and a conditionally removable from the body, formed in several parts Cover body composed.
  • the cover body has a parallel to that of the Grinding wheel clamped plane extending flat section, which in a the Abrasive wheel partially releasing release position on the body with two, from the projecting side of the main body protruding screws can be fixed is, as well as two separate, circumferential cover strips, the spring-loaded and separated can be fixed to each other by means of radially projecting screws on the base body.
  • the flat portion of the cover body may be formed spring-loaded.
  • a disadvantage of the known solution is that for a regional release of the grinding wheel one or more of the parts of the multi-part cover body, against the acting Spring force, shifted and fixed in this position by means of the screws must be, which is cumbersome for the user and a large expenditure of time conditionally.
  • the invention has for its object to provide a safe and easy-to-use Rotary grinder with a dust hood to create, with a grinding in Corners and hard to reach areas of the ground is possible without the There is a risk of losing the covering body.
  • the inventive determination of the cover body on the body with the help at least one projecting from the base towards the housing Fastener ensures that the body for the operator is always at hand, without these previously removed from the body Cover body has to look long.
  • a positioning of the cover body on the Fastener is also very easy and fast, as the fastener well visible and easily accessible.
  • the attachment means is of at least one, substantially formed parallel to the drive shaft extending bolt on which the cover body attachable is.
  • From the main body of the rotary grinder for example, four protrude Bolt, with two bolts closest to the drive shaft a larger one Have length as two more bolts, which are a greater distance from the Have drive shaft.
  • the cover body is for example at two each other opposite, spaced-apart end regions each having a clamping region provided, wherein each of the two clamping areas in a the scope of Abrasive wheel area releasing release position of the cover body on the longer bolt is attached.
  • the shorter bolts are used to fix the Cover body in a the grinding wheel together with the main body on the housing side and fully covering working position.
  • the cover body from the working position in the release position swiveled is expediently forms the protruding from the base towards the housing
  • Bolt a guide and a pivot axis for the cover body.
  • the cover body has at a free end on the pin attachable clamping area, the at least partially surrounds the bolt.
  • the cover body is first moved along the bolt towards the housing and then above the housing facing side of the body with its free end in the direction of the drive shaft in its release position pivoted.
  • the dust cover on a side facing away from the housing free end provided with a ring which projects beyond a grinding surface of the grinding wheel and consists of an elastic, air-permeable material such as bristles.
  • This wreath will be a between the free end of the dust cover and the Surface of the subsurface extending curtain created, on the one hand prevents Abrasive material removed from the substrate leaves the dust cover can, on the other hand, air from the outside penetrate into the dust cover, so that one Suction flow generated by an external suction device does not break off.
  • the rotary sander shown in FIGS. 1 to 4 have a housing 10, in the example, an unillustrated electric drive motor is arranged.
  • the Control of this drive motor takes place for example via a housing 10th arranged, also not shown electric switch.
  • the drive motor has a from the housing 10 projecting drive shaft 3, 13, on, at the free end of a Grinding wheel 4, 14, is releasably fixed.
  • the dust cover is made in two parts and serves the full coverage of the grinding wheel 4, 14.
  • the Dust cover is composed of a fixed to the housing 10 in connection standing base body 1, 11, and one on the base body 1, 11, Anordbaren cover body 2, 12, of a circular segment-like, or nikauschnittartig formed part is formed.
  • a Wreath arranged, made of an elastic, air-permeable material such as bristles which project slightly beyond an abrasive surface of the grinding wheel 4, 14.
  • a first Partial rim 5, 15, of the rim is located on the base body 1, 11, and a second sub-rim 6, 16, of the rim is located on the cover body 2,12.
  • a suction nozzle 9, 19, which is not with a shown suction device can be brought into connection.
  • the base body 11 shown in FIGS. 3 and 4 has a peripheral area Bolt 17, which is parallel to the longitudinal axis of the drive shaft 13 in the direction of a Not shown housing of the rotary grinder extends.
  • This bolt 17 serves to accommodate the cover body 12.
  • this cover body 12 on a pin 17 attachable clamping portion 18, the bolt 17 at least partially surrounds.
  • the parallel to the longitudinal axis of the drive shaft 13 projected projection surface of the cover body 12 is substantially circular section educated.
  • the cover body 12 shown in FIG. 3 is located in a Scope of the grinding wheel 14 partially releasing release position. To this Be able to bring cover body 12 from its release position into a working position, in which he contributes to the cover of the grinding wheel 14, the cover body 12 of the Drive shaft 13 pivoted away and then axially away from the housing in the direction Grinding wheel 14 offset.

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)
  • Polishing Bodies And Polishing Tools (AREA)
  • Closures For Containers (AREA)

Abstract

In its release position the cover (2) can be fixed to one or more bolts (7) rising up from the main body (1) side facing the housing (10). The bolt acts as the pivot axis for the fitted cover to swing parallel to the drive shaft (3) in relation to the main body (1). In a variant, the cover is served by two guides arranged parallel to one diameter of the dust guard and the guard is fitted at the end furthest from the housing (10) with a rim piece which in turn overlaps the wheel grinding surface (4) and consists of elastic air-permeable bristles.

Description

Die Erfindung betrifft ein Rotationsschleifgerät gemäss dem Oberbegriff des Patentanspruchs 1.The invention relates to a rotary grinder according to the preamble of the claim 1.

Zur materialabtragenden Oberflächenbearbeitung von Untergründen wie Beton, Gestein oder Metall wird beispielsweise das aus der DE-297 17 099 U1 bekannte Rotationsschleifgerät verwendet. Dieses Rotationsschleifgerät weist ein Gehäuse, sowie einen Antriebsmotor mit einer Antriebswelle, eine an dem freien Ende der Antriebswelle angeordnete Schleifscheibe und eine zweiteilige, kreisförmige Staubschutzhaube auf. Die Staubschutzhaube deckt die Schleifscheibe zum Gehäuse hin, sowie vollumfänglich ab. Ein erstes Teil der Staubschutzhaube wird von einem Grundkörper gebildet, der fest mit dem Gehäuse in Verbindung steht. Ein zweites Teil der Staubschutzhaube wird von einem kreisabschnittartig ausgebildeten Abdeckkörper gebildet, der um eine sich senkrecht zur Längsachse der Antriebswelle erstreckende Achse schwenkbar an dem Grundkörper festlegbar ist. Von dem Grundkörper ragt ein Absaugstutzen ab, durch den abgetragenes Schleifgut mittels einer externen Absaugvorrichtung aus der Staubschutzhaube absaugbar ist.For removing material from surfaces such as concrete, stone or metal, for example, the known from DE-297 17 099 U1 rotary grinder used. This rotary grinder has a housing, as well as a Drive motor with a drive shaft, one arranged at the free end of the drive shaft Grinding wheel and a two-piece, circular dust cover on. The Dust cover covers the grinding wheel towards the housing, as well as completely from. A first part of the dust cover is formed by a body firmly with the housing is in communication. A second part of the dust cover is from a circular section formed cover body formed around a vertically to the longitudinal axis of the drive shaft extending axis pivotally mounted on the main body is determinable. From the main body protrudes an exhaust, through the ablated Abrasive material by means of an external suction device from the dust cover is sucked.

Damit ein Schleifen mit dem Rotationsschleifgerät auch in Ecken und anderen schwer zugänglichen Stellen des Untergrundes möglich ist, ist der Abdeckkörper von dem Grundkörper abnehmbar, so dass die Schleifscheibe bereichsweise freigegeben wird. Dieses bekannte Rotationsschleifgerät hat den Nachteil, dass man den Abdeckkörper, insbesondere dann wenn er über einen längeren Zeitraum nicht gebraucht wird, nicht mehr findet oder verliert.So that grinding with the rotary grinder even in corners and other difficult accessible areas of the substrate is possible, the cover body of the Body removable, so that the grinding wheel is released area by area. This known rotary grinder has the disadvantage that the covering body, especially if it is not needed for a long period, not finds more or loses.

Aus der US 2,384,243 A ist eine Schutzhaube für ein Rotationsschleifgerät bekannt, wobei die Schutzhaube sich aus einem fest mit dem Gehäuse des Rotationsschleifgerätes verbindbaren Grundkörper und einem vom Grundkörper bedingt abnehmbaren, mehrteilig ausgebildeten Abdeckkörper zusammensetzt. Der Abdeckkörper weist einen parallel zu der von der Schleifscheibe aufgespannten Ebene verlaufenden flächigen Abschnitt, der in einer die Schleifscheibe bereichsweise freigebenden Freigabestellung am Grundkörper mit zwei, von der dem Gehäuse zugewandten Seite des Grundkörpers abragenden Schrauben festlegbar ist, sowie zwei separate, umfangsseitige Abdeckstreifen auf, die federbeaufschlagt und getrennt voneinander mittels radial abragenden Schrauben am Grundkörper festlegbar sind. Auch der flächige Abschnitt des Abdeckkörpers kann federbeaufschlagt ausgebildet sein.From US 2,384,243 A a protective hood for a rotary grinder is known, wherein the protective cover is made of a firmly connectable to the housing of the rotary sander Base body and a conditionally removable from the body, formed in several parts Cover body composed. The cover body has a parallel to that of the Grinding wheel clamped plane extending flat section, which in a the Abrasive wheel partially releasing release position on the body with two, from the projecting side of the main body protruding screws can be fixed is, as well as two separate, circumferential cover strips, the spring-loaded and separated can be fixed to each other by means of radially projecting screws on the base body. Also, the flat portion of the cover body may be formed spring-loaded.

Nachteilig an der bekannten Lösung ist, dass für eine bereichsweise Freigabe der Schleifscheibe eines oder mehrere der Teile des mehrteiligen Abdeckkörpers, entgegen der wirkenden Federkraft, verschoben und in dieser Positionierung mittels den Schrauben fixiert werden müssen, was für den Anwender umständlich ist und einen grossen zeitlichen Aufwand bedingt.A disadvantage of the known solution is that for a regional release of the grinding wheel one or more of the parts of the multi-part cover body, against the acting Spring force, shifted and fixed in this position by means of the screws must be, which is cumbersome for the user and a large expenditure of time conditionally.

Der Erfindung liegt die Aufgabe zugrunde, ein sicheres und einfach zu bedienendes Rotationsschleifgerät mit einer Staubabsaughaube zu schaffen, mit der ein Schleifen in Ecken und schwer zugänglichen Stellen des Untergrundes möglich ist ohne dass die Gefahr besteht, den Abdeckkörper zu verlieren. The invention has for its object to provide a safe and easy-to-use Rotary grinder with a dust hood to create, with a grinding in Corners and hard to reach areas of the ground is possible without the There is a risk of losing the covering body.

Die Lösung dieser Aufgabe erfolgt durch ein Rotationsschleifgerät, welches die im kennzeichnenden Abschnitt des Patentanspruchs 1 angeführten Merkmale aufweist.The solution to this problem is achieved by a rotary grinder, which in the characterizing Having section of claim 1 features listed.

Die erfindungsgemässe Festlegung des Abdeckkörpers an dem Grundkörper mit Hilfe wenigstens einem von dem Grundkörper in Richtung Gehäuse abragenden Befestigungsmittel wird gewährleistet, dass der Grundkörper für die Bedienungsperson jederzeit griffbereit ist, ohne dass diese den zuvor von dem Grundkörper abgenommenen Abdeckkörper lange suchen muss. Eine Positionierung des Abdeckkörpers auf dem Befestigungsmittel erfolgt ebenfalls sehr einfach und schnell, da das Befestigungsmittel gut sichtbar und leicht erreichbar angeordnet ist.The inventive determination of the cover body on the body with the help at least one projecting from the base towards the housing Fastener ensures that the body for the operator is always at hand, without these previously removed from the body Cover body has to look long. A positioning of the cover body on the Fastener is also very easy and fast, as the fastener well visible and easily accessible.

Das Befestigungsmittel ist von wenigstens einem, im wesentlichen parallel zur Antriebswelle erstreckenden Bolzen gebildet, auf den der Abdeckkörper aufsteckbar ist. Von dem Grundkörper des Rotationsschleifgerätes ragen beispielsweise vier Bolzen ab, wobei zwei der Antriebswelle am Nächsten liegende Bolzen eine grössere Länge aufweisen als zwei weitere Bolzen, die eine grössere Entfernung von der Antriebswelle besitzen. Der Abdeckkörper ist beispielsweise an zwei einander gegenüberliegenden, voneinander beabstandeten Endbereichen mit je einem Klemmbereich versehen, wobei jeder der beiden Klemmbereiche in einer den Umfang der Schleifscheibe bereichsweise freigebenden Freigabestellung des Abdeckkörpers auf die längeren Bolzen aufgesteckt ist. Die kürzeren Bolzen dienen der Festlegung des Abdeckkörpers in einer die Schleifscheibe zusammen mit dem Grundkörper gehäuseseitig und vollumfänglich abdeckenden Arbeitsstellung.The attachment means is of at least one, substantially formed parallel to the drive shaft extending bolt on which the cover body attachable is. From the main body of the rotary grinder, for example, four protrude Bolt, with two bolts closest to the drive shaft a larger one Have length as two more bolts, which are a greater distance from the Have drive shaft. The cover body is for example at two each other opposite, spaced-apart end regions each having a clamping region provided, wherein each of the two clamping areas in a the scope of Abrasive wheel area releasing release position of the cover body on the longer bolt is attached. The shorter bolts are used to fix the Cover body in a the grinding wheel together with the main body on the housing side and fully covering working position.

Damit der Abdeckkörper von der Arbeitsstellung in die Freigabestellung verschwenkbar ist, bildet zweckmässigerweise der vom Grundkörper in Richtung Gehäuse abragende Bolzen eine Führung und eine Schwenkachse für den Abdeckkörper. Der Abdeckkörper weist an einem freien Ende einen auf den Bolzen aufsteckbaren Klemmbereich auf, der den Bolzen wenigstens teilweise umgreift.So that the cover body from the working position in the release position swiveled is expediently forms the protruding from the base towards the housing Bolt a guide and a pivot axis for the cover body. The cover body has at a free end on the pin attachable clamping area, the at least partially surrounds the bolt.

Um den Abdeckkörper von der Arbeitsstellung in die Freigabestellung versetzen zu können, wird der Abdeckkörper zuerst entlang des Bolzens in Richtung Gehäuse verschoben und anschliessend oberhalb der dem Gehäuse zugewandten Seite des Grundkörpers mit seinem freien Ende in Richtung Antriebswelle in seine Freigabestellung geschwenkt. To move the cover from the working position to the release position can, the cover body is first moved along the bolt towards the housing and then above the housing facing side of the body with its free end in the direction of the drive shaft in its release position pivoted.

Zweckmässigerweise ist die Staubschutzhaube an einem vom Gehäuse abgewandten freien Ende mit einem Kranz versehen, der eine Schleiffläche der Schleifscheibe überragt und aus einem elastischen, luftdurchlässigen Material wie Borsten besteht. Mit Hilfe dieses Kranzes wird ein sich zwischen dem freien Ende der Staubschutzhaube und der Oberfläche des Untergrundes erstreckender Vorhang geschaffen, der einerseits verhindert, dass vom Untergrund abgetragenes Schleifgut die Staubschutzhaube verlassen kann, andererseits Luft von aussen in die Staubschutzhaube eindringen lässt, damit ein von einer externen Absaugvorrichtung erzeugter Saugstrom nicht abreisst.Conveniently, the dust cover on a side facing away from the housing free end provided with a ring which projects beyond a grinding surface of the grinding wheel and consists of an elastic, air-permeable material such as bristles. With help This wreath will be a between the free end of the dust cover and the Surface of the subsurface extending curtain created, on the one hand prevents Abrasive material removed from the substrate leaves the dust cover can, on the other hand, air from the outside penetrate into the dust cover, so that one Suction flow generated by an external suction device does not break off.

Die Erfindung wird anhand von Zeichnungen, die mehrere Ausführungsbeispiele wiedergeben, näher erläutert. Es zeigen:

Fig. 1
ein erfindungsgemässes, teilweise dargestelltes Rotationsschleifgerät in der Seitenansicht; teilweise geschnitten; der Abdeckkörper steckt auf zwei am Grundkörper angeordneten Bolzen;
Fig. 2
einen Schnitt durch das Rotationsschleifgerät gemäss Fig. 1 entlang der Linie II-II;
Fig. 3
ein teilweise dargestelltes, weiteres Rotationsschleifgerät in der Seitenansicht; teilweise geschnitten; der Abdeckkörper ist um einen am Grundkörper angeordneten Bolzen schwenkbar;
Fig. 4
einen Schnitt durch das Rotationsschleifgerät gemäss Fig. 3 entlang der Linie IV-IV;
The invention will be explained in more detail with reference to drawings, which reproduce several embodiments. Show it:
Fig. 1
an inventive, partially illustrated rotary grinder in the side view; partially cut; the cover body is placed on two bolts arranged on the main body;
Fig. 2
a section through the rotary grinder of Figure 1 along the line II-II.
Fig. 3
a partially illustrated, another rotary grinder in the side view; partially cut; the cover body is pivotable about a bolt arranged on the base body;
Fig. 4
a section through the rotary grinder according to FIG. 3 along the line IV-IV;

Die in den Fig. 1 bis 4 dargestellten Rotationsschleifgeräte weisen ein Gehäuse 10 auf, in dem beispielsweise ein nicht dargestellter elektrischer Antriebsmotor angeordnet ist. Die Steuerung dieses Antriebsmotors erfolgt beispielsweise über einen am Gehäuse 10 angeordneten, ebenfalls nicht dargestellten Elektroschalter. Der Antriebsmotor weist eine aus dem Gehäuse 10 ragende Antriebswelle 3, 13, auf, an deren freiem Ende eine Schleifscheibe 4, 14, lösbar festgelegt ist. Die Staubschutzhaube ist zweiteilig ausgebildet und dient der vollumfänglichen Abdeckung der Schleifscheibe 4, 14. Die Staubschutzhaube setzt sich zusammen aus einem fest mit dem Gehäuse 10 in Verbindung stehenden Grundkörper 1, 11, und einem an dem Grundkörper 1, 11, anordbaren Abdeckkörper 2, 12, der von einem kreisabschnittartig, bzw. kreisauschnittartig ausgebildeten Teil gebildet ist.The rotary sander shown in FIGS. 1 to 4 have a housing 10, in the example, an unillustrated electric drive motor is arranged. The Control of this drive motor takes place for example via a housing 10th arranged, also not shown electric switch. The drive motor has a from the housing 10 projecting drive shaft 3, 13, on, at the free end of a Grinding wheel 4, 14, is releasably fixed. The dust cover is made in two parts and serves the full coverage of the grinding wheel 4, 14. The Dust cover is composed of a fixed to the housing 10 in connection standing base body 1, 11, and one on the base body 1, 11, Anordbaren cover body 2, 12, of a circular segment-like, or kreisauschnittartig formed part is formed.

An einem vom Gehäuse 10 abgewandten freien Ende der Staubschutzhaube ist ein Kranz angeordnet, der aus einem elastischen, luftdurchlässigen Material wie Borsten besteht, die eine Schleiffläche der Schleifscheibe 4, 14, etwas überragen. Ein erster Teilkranz 5, 15, des Kranzes befindet sich an dem Grundkörper 1, 11, und ein zweiter Teilkranz 6, 16, des Kranzes befindet sich an dem Abdeckkörper 2,12. Der Grundkörper 1, 11, ist mit einem Absaugstutzen 9, 19, versehen, der mit einer nicht dargestellten Absaugvorrichtung in Verbindung bringbar ist. At a remote from the housing 10 free end of the dust cover is a Wreath arranged, made of an elastic, air-permeable material such as bristles which project slightly beyond an abrasive surface of the grinding wheel 4, 14. A first Partial rim 5, 15, of the rim is located on the base body 1, 11, and a second sub-rim 6, 16, of the rim is located on the cover body 2,12. Of the Base body 1, 11, is provided with a suction nozzle 9, 19, which is not with a shown suction device can be brought into connection.

Von dem Grundkörper 1 des in den Fig. 1 und 2 dargestellten Rotationsschleifgerätes ragen vier Bolzen 7 in Richtung Gehäuse 10 ab, wobei zwei der Antriebswelle 3 am Nächsten liegende Bolzen 7 eine grössere Länge aufweisen als zwei weitere Bolzen 7, die eine grössere Entfernung von der Antriebswelle 3 besitzt. Die parallel zur Längsachse der Antriebswelle 3 projizierte Projektionsfläche des Abdeckkörpers 2 ist im wesentlichen kreisabschnittartig ausgebildet. Der Abdeckkörper 2 weist an zwei einander gegenüberliegenden, voneinander beabstandeten Endbereichen einen Klemmbereich auf, wobei jeder der beiden Klemmbereiche 8 in einer den Umfang der Schleifscheibe 4 bereichsweise freigebenden Freigabestellung des Abdeckkörpers 2 an den längeren Bolzen 7 lösbar festgelegt ist. Die kurzen Bolzen 7 dienen der Festlegung des Abdeckkörpers 2 in einer die Schleifscheibe 4 zusammen mit dem Grundkörper gehäuseseitig und vollumfänglich abdeckenden Arbeitsstellung.From the main body 1 of the rotary grinder shown in Figs. 1 and 2 protrude four bolts 7 in the direction of the housing 10, wherein two of the drive shaft 3 am Next lying bolts 7 have a greater length than two further bolts 7, which has a greater distance from the drive shaft 3. The parallel to the longitudinal axis the drive shaft 3 projected projection surface of the cover body 2 is in essentially formed like a circle. The cover body 2 has two at each other opposite, spaced-apart end portions a clamping region on, wherein each of the two clamping portions 8 in a circumference of the grinding wheel 4th partially releasing release position of the cover body 2 to the longer Bolt 7 is releasably fixed. The short bolts 7 serve to fix the cover body 2 in a grinding wheel 4 together with the main body housing side and fully covering working position.

Der in den Fig. 3 und 4 dargestellte Grundkörper 11 weist im Umfangsbereich einen Bolzen 17 auf, der sich parallel zur Längsachse der Antriebswelle 13 in Richtung eines nicht dargestellten Gehäuses des Rotationsschleifgerätes erstreckt. Dieser Bolzen 17 dient der Aufnahme des Abdeckkörpers 12. An einem freien Ende weist dieser Abdeckkörper 12 einen auf den Bolzen 17 aufsteckbaren Klemmbereich 18 auf, der den Bolzen 17 wenigstens teilweise umgreift. Die parallel zur Längsachse der Antriebswelle 13 projizierte Projektionsfläche des Abdeckkörpers 12 ist im wesentlichen kreisabschnittartig ausgebildet. Der in der Fig. 3 dargestellte Abdeckkörper 12 befindet sich in einer den Umfang der Schleifscheibe 14 bereichsweise freigebenden Freigabestellung. Um diesen Abdeckkörper 12 von seiner Freigabestellung in eine Arbeitsstellung bringen zu können, in der er zur Abdeckung der Schleifscheibe 14 beiträgt, wird der Abdeckkörper 12 von der Antriebswelle 13 weggeschwenkt und anschliessend axial vom Gehäuse weg in Richtung Schleifscheibe 14 versetzt.The base body 11 shown in FIGS. 3 and 4 has a peripheral area Bolt 17, which is parallel to the longitudinal axis of the drive shaft 13 in the direction of a Not shown housing of the rotary grinder extends. This bolt 17 serves to accommodate the cover body 12. At a free end, this cover body 12 on a pin 17 attachable clamping portion 18, the bolt 17 at least partially surrounds. The parallel to the longitudinal axis of the drive shaft 13 projected projection surface of the cover body 12 is substantially circular section educated. The cover body 12 shown in FIG. 3 is located in a Scope of the grinding wheel 14 partially releasing release position. To this Be able to bring cover body 12 from its release position into a working position, in which he contributes to the cover of the grinding wheel 14, the cover body 12 of the Drive shaft 13 pivoted away and then axially away from the housing in the direction Grinding wheel 14 offset.

Claims (3)

  1. Rotary grinding device having a housing (10), a drive motor with a drive shaft (3, 13), a grinding disk (4, 14) fixable on the drive shaft (3, 13) and a dust protection housing able entirely to cover the grinding disk (4, 14), whereby the dust protection housing comprises a base member (1, 11) able to be firmly linked to the housing (10) and a cover member (2, 12) designed as a circular segment and removable from the base member (1, 11) and the cover member (2, 12) may be fixed in a freeing position on the base member (1, 11) partially freeing the grinding disk (4, 14) and may be fixed in its freeing position to at least one fixing means projecting from the side of the base member (1, 11) facing towards the housing (10), characterised in that the fixing means comprises at least one bolt (7, 17) extending substantially parallel to the drive shaft (3, 13), onto which bolt the cover member (2, 12) may be placed.
  2. Rotary grinding device according to claim 1, characterised in that the bolt (7, 17) comprises a pivot axis for the cover member (2, 12) pivotable relative to the base member (10).
  3. Rotary grinding device according to one of the claims 1 or 2, characterised in that the dust protection housing is provided on a free end facing away from the housing (10) with a rim which projects beyond a grinding surface of the grinding disk (4, 14) and comprises an elastic air-permeable material such as bristles.
EP20000810526 1999-08-03 2000-06-16 Dust protective cover for surface grinding tool Expired - Lifetime EP1074341B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK00810526T DK1074341T3 (en) 1999-08-03 2000-06-16 Dust protection cap for surface grinders

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999136555 DE19936555A1 (en) 1999-08-03 1999-08-03 Dust cover for surface grinder
DE19936555 1999-08-03

Publications (3)

Publication Number Publication Date
EP1074341A2 EP1074341A2 (en) 2001-02-07
EP1074341A3 EP1074341A3 (en) 2003-05-28
EP1074341B1 true EP1074341B1 (en) 2005-03-16

Family

ID=7917062

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000810526 Expired - Lifetime EP1074341B1 (en) 1999-08-03 2000-06-16 Dust protective cover for surface grinding tool

Country Status (9)

Country Link
US (1) US6471574B1 (en)
EP (1) EP1074341B1 (en)
JP (1) JP2001038599A (en)
AT (1) ATE290940T1 (en)
CA (1) CA2314054A1 (en)
DE (2) DE19936555A1 (en)
DK (1) DK1074341T3 (en)
ES (1) ES2238983T3 (en)
PL (1) PL194106B1 (en)

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US9289879B2 (en) 2013-05-02 2016-03-22 Black & Decker Inc. Hinge assembly for an angle grinder dust shroud
US11867224B2 (en) 2021-01-27 2024-01-09 Black & Decker Inc. Locking mechanism for two telescoping poles of a power tool
US11931851B2 (en) 2019-10-23 2024-03-19 Black & Decker Inc. Pole sander

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US11123839B2 (en) 2018-10-23 2021-09-21 Dustless Depot Llc Grinder dust shroud with input shaft gasket and adjustable mounting mechanism
USD908149S1 (en) 2018-10-23 2021-01-19 Dustless Depot Llc Angle grinder dust shroud with variable position slots for mounting brackets
US11273505B2 (en) 2019-03-27 2022-03-15 Dustless Depot, Llc Circular saw dust collection shroud
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Publication number Priority date Publication date Assignee Title
US9289879B2 (en) 2013-05-02 2016-03-22 Black & Decker Inc. Hinge assembly for an angle grinder dust shroud
US11931851B2 (en) 2019-10-23 2024-03-19 Black & Decker Inc. Pole sander
US11867224B2 (en) 2021-01-27 2024-01-09 Black & Decker Inc. Locking mechanism for two telescoping poles of a power tool

Also Published As

Publication number Publication date
PL341790A1 (en) 2001-02-12
US6471574B1 (en) 2002-10-29
EP1074341A3 (en) 2003-05-28
PL194106B1 (en) 2007-04-30
EP1074341A2 (en) 2001-02-07
CA2314054A1 (en) 2001-02-03
DE50009763D1 (en) 2005-04-21
ATE290940T1 (en) 2005-04-15
DK1074341T3 (en) 2005-06-27
DE19936555A1 (en) 2001-02-08
JP2001038599A (en) 2001-02-13
ES2238983T3 (en) 2005-09-16

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