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EP1074341A2 - Dust protective cover for surface grinding tool - Google Patents

Dust protective cover for surface grinding tool Download PDF

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Publication number
EP1074341A2
EP1074341A2 EP20000810526 EP00810526A EP1074341A2 EP 1074341 A2 EP1074341 A2 EP 1074341A2 EP 20000810526 EP20000810526 EP 20000810526 EP 00810526 A EP00810526 A EP 00810526A EP 1074341 A2 EP1074341 A2 EP 1074341A2
Authority
EP
European Patent Office
Prior art keywords
housing
cover
cover body
base body
drive shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20000810526
Other languages
German (de)
French (fr)
Other versions
EP1074341B1 (en
EP1074341A3 (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 grinding device according to the preamble of the claim 1.
  • rotary grinding device for material-removing surface treatment of substrates such as concrete, stone or metal becomes, for example, the rotary grinding device known from DE-297 17 099 U1 used.
  • This rotary grinder has a housing and a Drive motor with a drive shaft, one arranged at the free end of the drive shaft Grinding wheel and a two-part, circular dust cover.
  • the Dust cover covers the grinding wheel towards the housing, as well as completely.
  • a first part of the dust cover is formed by a base body that is fixed with is connected to the housing.
  • a second part of the dust cover is made by formed a circular segment-like cover body which is perpendicular to one another axis extending to the longitudinal axis of the drive shaft is pivotable on the base body is definable.
  • a suction nozzle protrudes from the base body, through which removed Abrasive material from the dust cover by means of an external suction device is extractable.
  • the invention has for its object a safe and easy to use Rotary grinder with a dust extraction hood to create a grinding in Corners and hard-to-reach places on the surface are possible without the There is a risk of losing the cover body.
  • the inventive fixing of the cover body on the base body with the help at least one protruding from the base body in the direction of the housing Fasteners ensure that the main body for the operator is at hand at all times without it being removed from the base body Cover body must look for a long time. Positioning the cover body on the Fasteners are also very easy and quick because the fasteners is clearly visible and easily accessible.
  • the fastener is essentially at least one Bolt extending parallel to the drive shaft, onto which the cover body can be plugged is.
  • the cover body is on two each other, for example opposite, spaced-apart end areas each with a clamping area provided, each of the two clamping areas in one the circumference of the Grinding wheel in some areas releasing the position of the cover body on the longer bolt is attached.
  • the shorter bolts are used to fix the Cover body in a grinding wheel together with the base body on the housing side and fully covering working position.
  • the cover body can be pivoted from the working position into the release position is expediently that which protrudes from the base body in the direction of the housing
  • the cover body has at one free end a clip area that can be plugged onto the bolt at least partially engages around the bolt.
  • the cover body is first moved along the bolt towards the housing and then above the side of the base body facing the housing with its free end towards the drive shaft in its release position pivoted.
  • the leadership is, for example, of a guide channel and one in the Guide channel protruding and displaceable along the guide channel educated.
  • the guide channel is, for example, on the base body and the Guide element arranged on the cover body or vice versa.
  • the dust cover is expediently located on a side facing away from the housing Provide a free end with a ring that projects over a grinding surface of the grinding wheel and is made of an elastic, air-permeable material such as bristles. With help This wreath will be between the free end of the dust cover and the The surface of the underground is extended, which on the one hand prevents that abrasive material removed from the surface leaves the dust cover can, on the other hand, allow air to enter the dust cover from the outside, thus suction flow generated by an external suction device does not tear off.
  • the rotary grinding devices shown in FIGS. 1 to 8 have a housing 10, in which is arranged, for example, an electric drive motor, not shown.
  • the This drive motor is controlled, for example, via a on the housing 10 arranged, also not shown electrical switch.
  • the drive motor has one from the housing 10 projecting drive shaft 3, 13, 23, at the free end of a Grinding wheel 4, 14, 24 is releasably fixed.
  • the dust cover is made in two parts and serves the full coverage of the grinding wheel 4, 14, 24. Die
  • Die The dust cover is made up of a fixed connection to the housing 10 standing base body 1, 11, 21 and one on the base body 1, 11, 21 can be arranged covering body 2, 12, 22, of a circular segment or circular segment trained part is formed.
  • a first one Partial ring 5, 15, 25 of the ring is located on the base body 1, 11, 21 and second partial ring 6, 16, 26 of the ring is located on the cover body 2, 12 22.
  • the Base body 1, 11, 21 is provided with a suction nozzle 9, 19, 29, which does not have one suction device shown can be connected.
  • the base body 11 shown in FIGS. 3 and 4 has one in the peripheral region 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 17th serves to accommodate the cover body 12.
  • This cover body has a free end 12 a clip area 18 which can be plugged onto the pin 17 and which holds the pin 17 encompasses at least partially.
  • the parallel to the longitudinal axis of the drive shaft 13 projected projection surface of the cover body 12 is essentially a segment of a circle educated.
  • the cover body 12 shown in FIG. 3 is in a Scope of the grinding wheel 14 release position in some areas. To this To be able to bring cover body 12 from its release position into a working position, in which it 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.
  • the cover body 22 shown in FIGS. 5 to 8 is essentially a circular section formed and along one between the base body 21 and the cover body 22 acting guide 27, 28 from one of the cover of the grinding wheel 24 Contributing working position in a regionally releasing the grinding wheel 24 Release position removable. Starting from the working position, the cover body 22 first parallel to the longitudinal axis of the drive shaft 23 in one of the grinding wheel 24 facing away and then in a substantially perpendicular to Drive shaft 23 in the direction extending into the release position. Means Not shown means is the cover body 22 both in the working position can also be fixed in the release position on the base body 21.
  • the guide 27, 28 will for example of a guide channel, not shown, and one in the Guide channel protruding and displaceable along the guide channel, also not shown guide element formed.
  • the guide channel is on the example Base body and the guide element arranged on the cover body or vice versa.

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 grinding device 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 material-removing surface treatment of substrates such as concrete, stone or metal becomes, for example, the rotary grinding device known from DE-297 17 099 U1 used. This rotary grinder has a housing and a Drive motor with a drive shaft, one arranged at the free end of the drive shaft Grinding wheel and a two-part, circular dust cover. The Dust cover covers the grinding wheel towards the housing, as well as completely. A first part of the dust cover is formed by a base body that is fixed with is connected to the housing. A second part of the dust cover is made by formed a circular segment-like cover body which is perpendicular to one another axis extending to the longitudinal axis of the drive shaft is pivotable on the base body is definable. A suction nozzle protrudes from the base body, through which removed Abrasive material from the dust cover by means of an external suction device is extractable.

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 grinding with the rotary grinder is difficult even in corners and others accessible areas of the surface is possible, the cover body of the Base body removable, so that the grinding wheel is released in certain areas. This known rotary grinding device has the disadvantage that the cover body, especially if it is not used for a long period of time, not finds more or loses.

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 a safe and easy to use Rotary grinder with a dust extraction hood to create a grinding in Corners and hard-to-reach places on the surface are possible without the There is a risk of losing the cover body.

Die Lösung dieser Aufgabe erfolgt durch ein Rotationsschleifgerät, welches die im kennzeichnenden Abschnitt des Patentanspruchs 1 angeführten Merkmale aufweist.This task is solved by a rotary grinder, which is characteristic of the 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 fixing of the cover body on the base body with the help at least one protruding from the base body in the direction of the housing Fasteners ensure that the main body for the operator is at hand at all times without it being removed from the base body Cover body must look for a long time. Positioning the cover body on the Fasteners are also very easy and quick because the fasteners is clearly visible and easily accessible.

Vorteilhafterweise ist das Befestigungsmittel 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.Advantageously, the fastener is essentially at least one Bolt extending parallel to the drive shaft, onto which the cover body can be plugged is. For example, four protrude from the base body of the rotary grinding device Remove the bolts, with two bolts closest to the drive shaft being a larger one Have length than two other bolts that are a greater distance from the Own drive shaft. The cover body is on two each other, for example opposite, spaced-apart end areas each with a clamping area provided, each of the two clamping areas in one the circumference of the Grinding wheel in some areas releasing the position of the cover body on the longer bolt is attached. The shorter bolts are used to fix the Cover body in a grinding wheel together with the base 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 can be pivoted from the working position into the release position is expediently that which protrudes from the base body in the direction of the housing Bolts a guide and a pivot axis for the cover body. The cover body has at one free end a clip area that can be plugged onto the bolt at least partially engages around 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 body 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 side of the base body facing the housing with its free end towards the drive shaft in its release position pivoted.

Damit der Abdeckkörper schnell und einfach von einer Arbeitsstellung in die Freigabestellung versetzt werden kann, ist zweckmässigerweise das Befestigungsmittel von wenigstens einer zwischen dem Grundkörper und dem Abdeckkörper wirkenden Führung gebildet, die sich im wesentlichen parallel zu einem Durchmesser der Staubschutzhaube erstreckt. Die Führung wird beispielsweise von einem Führungskanal und einem in den Führungskanal ragenden und entlang des Führungskanals versetzbaren Führungselement gebildet. Der Führungskanal ist beispielsweise an dem Grundkörper und das Führungselement an dem Abdeckkörper oder umgekehrt angeordnet.So that the cover body quickly and easily from a working position to the release position can be moved, is the fastener of at least one guide acting between the base body and the cover body formed, which is substantially parallel to a diameter of the dust cover extends. The leadership is, for example, of a guide channel and one in the Guide channel protruding and displaceable along the guide channel educated. The guide channel is, for example, on the base body and the Guide element arranged on the cover body or vice versa.

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.The dust cover is expediently located on a side facing away from the housing Provide a free end with a ring that projects over a grinding surface of the grinding wheel and is made of an elastic, air-permeable material such as bristles. With help This wreath will be between the free end of the dust cover and the The surface of the underground is extended, which on the one hand prevents that abrasive material removed from the surface leaves the dust cover can, on the other hand, allow air to enter the dust cover from the outside, thus suction flow generated by an external suction device does not tear 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;
Fig. 5
ein teilweise dargestelltes, weiteres Rotationsschleifgerät in der Seitenansicht und teilweise geschnitten; der entlang einer Führung des Grundkörpers versetzbare Abdeckkörper befindet sich in einer Freigabestellung;
Fig. 6
einen Schnitt durch das Rotationsschleifgerät gemäss Fig. 5 entlang der Linie VI-VI;
Fig. 7
den in Fig. 5 dargestellten Ausschnitt; der Abdeckkörper befindet sich in einer die Schleifscheibe gehäuseseitig und umfangsseitig abdeckenden Arbeitsstellung;
Fig. 8
den in Fig. 5 dargestellten Ausschnitt; der Abdeckkörper befindet sich in einer zwischen der Freigabestellung und der Arbeitsstellung liegenden Zwischenstellung.
The invention is explained in more detail with reference to drawings which show several exemplary embodiments. Show it:
Fig. 1
an inventive, partially shown rotary grinder in side view; partially cut; the cover body is placed on two bolts arranged on the base body;
Fig. 2
a section through the rotary grinder according to Figure 1 along the line II-II.
Fig. 3
a partially shown, another rotary grinder in 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 Figure 3 along the line IV-IV.
Fig. 5
a partially shown, another rotary grinder in side view and partially cut; the cover body which can be displaced along a guide of the base body is in a release position;
Fig. 6
a section through the rotary grinder according to Figure 5 along the line VI-VI.
Fig. 7
the section shown in Fig. 5; the cover body is in a working position covering the grinding wheel on the housing side and on the circumference;
Fig. 8
the section shown in Fig. 5; the cover body is in an intermediate position lying between the release position and the working position.

Die in den Fig. 1 bis 8 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, 23 auf, an deren freiem Ende eine Schleifscheibe 4, 14, 24 lösbar festgelegt ist. Die Staubschutzhaube ist zweiteilig ausgebildet und dient der vollumfänglichen Abdeckung der Schleifscheibe 4, 14, 24. Die Staubschutzhaube setzt sich zusammen aus einem fest mit dem Gehäuse 10 in Verbindung stehenden Grundkörper 1, 11, 21 und einem an dem Grundkörper 1, 11, 21 anordbaren Abdeckkörper 2, 12, 22, der von einem kreisabschnittartig, bzw. kreisauschnittartig ausgebildeten Teil gebildet ist.The rotary grinding devices shown in FIGS. 1 to 8 have a housing 10, in which is arranged, for example, an electric drive motor, not shown. The This drive motor is controlled, for example, via a on the housing 10 arranged, also not shown electrical switch. The drive motor has one from the housing 10 projecting drive shaft 3, 13, 23, at the free end of a Grinding wheel 4, 14, 24 is releasably fixed. The dust cover is made in two parts and serves the full coverage of the grinding wheel 4, 14, 24. Die The dust cover is made up of a fixed connection to the housing 10 standing base body 1, 11, 21 and one on the base body 1, 11, 21 can be arranged covering body 2, 12, 22, of a circular segment or circular segment trained 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, 24 etwas überragen. Ein erster Teilkranz 5, 15, 25 des Kranzes befindet sich an dem Grundkörper 1, 11, 21 und ein zweiter Teilkranz 6, 16, 26 des Kranzes befindet sich an dem Abdeckkörper 2, 12 22. Der Grundkörper 1, 11, 21 ist mit einem Absaugstutzen 9, 19, 29 versehen, der mit einer nicht dargestellten Absaugvorrichtung in Verbindung bringbar ist. At a free end of the dust cover facing away from the housing 10 there is a Arranged wreath made of an elastic, air-permeable material such as bristles exists, which slightly protrude a grinding surface of the grinding wheel 4, 14, 24. A first one Partial ring 5, 15, 25 of the ring is located on the base body 1, 11, 21 and second partial ring 6, 16, 26 of the ring is located on the cover body 2, 12 22. The Base body 1, 11, 21 is provided with a suction nozzle 9, 19, 29, which does not have one suction device shown can be connected.

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 base body 1 of the rotary grinding device shown in FIGS. 1 and 2 four bolts 7 protrude in the direction of the housing 10, two of the drive shaft 3 on The nearest 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 projection of the cover 3 is projected onto the drive shaft 3 formed essentially like a segment of a circle. The cover body 2 points to one another opposite, spaced end areas a clamping area on, each of the two clamping areas 8 in one the circumference of the grinding wheel 4th regionally released release position of the cover body 2 on the longer Bolt 7 is releasably set. The short bolts 7 serve to fix the cover body 2 in a grinding wheel 4 together with the base body on the 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 one in the peripheral region 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 17th serves to accommodate the cover body 12. This cover body has a free end 12 a clip area 18 which can be plugged onto the pin 17 and which holds the pin 17 encompasses at least partially. The parallel to the longitudinal axis of the drive shaft 13 projected projection surface of the cover body 12 is essentially a segment of a circle educated. The cover body 12 shown in FIG. 3 is in a Scope of the grinding wheel 14 release position in some areas. To this To be able to bring cover body 12 from its release position into a working position, in which it 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.

Der in den Fig. 5 bis 8 dargestellte Abdeckkörper 22 ist im wesentlichen kreisausschnittartig ausgebildet und entlang einer zwischen dem Grundkörper 21 und dem Abdeckkörper 22 wirkenden Führung 27, 28 von einer der Abdeckung der Schleifscheibe 24 beitragenden Arbeitsstellung in eine die Schleifscheibe 24 bereichsweise freigebende Freigabestellung versetzbar. Ausgehend von der Arbeitsstellung ist der Abdeckkörper 22 zuerst parallel zur Längsachse der Antriebswelle 23 in einer von der Schleifscheibe 24 abgewandten Richtung und anschliessend in einer im wesentlichen senkrecht zur Antriebswelle 23 hin verlaufenden Richtung in die Freigabestellung versetzbar. Mittels nicht näher dargestellter Mittel ist der Abdeckkörper 22 sowohl in der Arbeitsstellung als auch in der Freigabestellung am Grundkörper 21 festlegbar. Die Führung 27, 28 wird beispielsweise von einem nicht dargestellten Führungskanal und einem in den Führungskanal ragenden und entlang des Führungskanals versetzbaren, ebenfalls nicht dargestellten Führungselement gebildet. Der Führungskanal ist beispielsweise an dem Grundkörper und das Führungselement an dem Abdeckkörper oder umgekehrt angeordnet.The cover body 22 shown in FIGS. 5 to 8 is essentially a circular section formed and along one between the base body 21 and the cover body 22 acting guide 27, 28 from one of the cover of the grinding wheel 24 Contributing working position in a regionally releasing the grinding wheel 24 Release position removable. Starting from the working position, the cover body 22 first parallel to the longitudinal axis of the drive shaft 23 in one of the grinding wheel 24 facing away and then in a substantially perpendicular to Drive shaft 23 in the direction extending into the release position. Means Not shown means is the cover body 22 both in the working position can also be fixed in the release position on the base body 21. The guide 27, 28 will for example of a guide channel, not shown, and one in the Guide channel protruding and displaceable along the guide channel, also not shown guide element formed. The guide channel is on the example Base body and the guide element arranged on the cover body or vice versa.

Claims (5)

Rotationsschleifgerät mit einem Gehäuse (10), einem Antriebsmotor mit einer Antriebswelle (3, 13, 23), einer an der Antriebswelle (3, 13, 23) festlegbaren Schleifscheibe (4, 14, 24) und einer die Schleifscheibe (4, 14, 24) gehäuseseitig vollumfänglich abdeckbaren Staubschutzhaube, wobei sich die Staubschutzhaube aus einem fest mit dem Gehäuse (10) verbindbaren Grundkörper (1, 11, 21) und einem vom Grundkörper (1, 11, 21) abnehmbaren, kreisabschnittartig ausgebildeten Abdeckkörper (2, 12, 22) zusammensetzt und der Abdeckkörper (2, 12, 22) in einer die Schleifscheibe (4, 14, 24) bereichsweise freigebenden Freigabestellung am Grundkörper (1, 11, 21) festlegbar ist, dadurch gekennzeichnet, dass der Abdeckkörper (2, 12, 22) in seiner Freigabestellung an wenigstens einem Befestigungsmittel festlegbar ist, das von der dem Gehäuse (10) zugewandten Seite des Grundkörpers (1, 11, 21) abragt.Rotary grinding device with a housing (10), a drive motor with a drive shaft (3, 13, 23), a grinding wheel (4, 14, 24) which can be fixed on the drive shaft (3, 13, 23) and one the grinding wheel (4, 14, 24) dust cover which can be completely covered on the housing side, the dust cover consisting of a base body (1, 11, 21) which can be fixedly connected to the housing (10) and a cover body (2, 12,) which can be removed from the base body (1, 11, 21). 22) and the cover body (2, 12, 22) can be fixed in a release position on the base body (1, 11, 21), which releases the grinding wheel (4, 14, 24), characterized in that the cover body (2, 12, 22) can be fixed in its release position on at least one fastening means which projects from the side of the base body (1, 11, 21) facing the housing (10). Rotationsschleifgerät nach Anspruch 1, dadurch gekennzeichnet, dass das Befestigungsmittel von wenigstens einem, im wesentlichen parallel zur Antriebswelle (3, 13) erstreckenden Bolzen (7, 17) gebildet ist, auf den der Abdeckkörper (2, 12) aufsteckbar ist.Rotary grinding device according to claim 1, characterized in that the Fastening means of at least one, essentially parallel to the drive shaft (3, 13) extending bolt (7, 17) is formed, on which the cover body (2, 12) can be plugged on. Rotationsschleifgerät nach Anspruch 2, dadurch gekennzeichnet, dass der Bolzen (7, 17) eine Schwenkachse für den gegenüber dem Grundkörper (10) schwenkbaren Abdeckkörper (2, 12) bildet.Rotary grinding device according to claim 2, characterized in that the bolt (7, 17) a swivel axis for the relative to the base body (10) swiveling cover body (2, 12) forms. Rotationsschleifgerät nach Anspruch 1, dadurch gekennzeichnet, dass das Befestigungsmittel von wenigstens einer Führung (27, 28) gebildet ist, die sich im wesentlichen parallel zu einem Durchmesser der Staubschutzhaube erstreckt.Rotary grinding device according to claim 1, characterized in that the Fastening means of at least one guide (27, 28) is formed, which is in the extends substantially parallel to a diameter of the dust cover. Rotationsschleifgerät nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Staubschutzhaube an einem vom Gehäuse (10) abgewandten freien Ende mit einem Kranz versehen ist, der eine Schleiffläche der Schleifscheibe (4, 14, 24) überragt und aus einem elastischen, luftdurchlässigen Material wie Borsten besteht.Rotary grinding device according to one of claims 1 to 4, characterized in that that the dust cover on a free of the housing (10) facing away Is provided at the end with a ring which has a grinding surface of the grinding wheel (4, 14, 24) and from an elastic, air-permeable material such as Bristles exist.
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)

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DE19936555 1999-08-03
DE1999136555 DE19936555A1 (en) 1999-08-03 1999-08-03 Dust cover for surface grinder

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

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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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Also Published As

Publication number Publication date
EP1074341B1 (en) 2005-03-16
EP1074341A3 (en) 2003-05-28
ES2238983T3 (en) 2005-09-16
JP2001038599A (en) 2001-02-13
PL341790A1 (en) 2001-02-12
ATE290940T1 (en) 2005-04-15
DE19936555A1 (en) 2001-02-08
PL194106B1 (en) 2007-04-30
US6471574B1 (en) 2002-10-29
DE50009763D1 (en) 2005-04-21
DK1074341T3 (en) 2005-06-27
CA2314054A1 (en) 2001-02-03

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