EP1361935B1 - Heavy-duty tool with a rotationally driven, disk-shaped hub - Google Patents

Heavy-duty tool with a rotationally driven, disk-shaped hub Download PDF

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Publication number
EP1361935B1
EP1361935B1 EP02704602A EP02704602A EP1361935B1 EP 1361935 B1 EP1361935 B1 EP 1361935B1 EP 02704602 A EP02704602 A EP 02704602A EP 02704602 A EP02704602 A EP 02704602A EP 1361935 B1 EP1361935 B1 EP 1361935B1
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EP
European Patent Office
Prior art keywords
hub
abrasive
application tool
tool according
disc
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
EP02704602A
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German (de)
French (fr)
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EP1361935A1 (en
Inventor
Harald Krondorfer
Markus Heckmann
Joachim Schadow
Christof Hoelzl
Johann Huber
Wilhelm Schulze
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.)
Tyrolit-Schleifmittelwerke Swarovski KG
Robert Bosch GmbH
Original Assignee
Tyrolit-Schleifmittelwerke Swarovski KG
Robert Bosch GmbH
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Publication date
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Publication of EP1361935A1 publication Critical patent/EP1361935A1/en
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Publication of EP1361935B1 publication Critical patent/EP1361935B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/02—Wheels in one piece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/16—Bushings; Mountings

Definitions

  • the invention is based on an insert tool with a rotationally driven disc-shaped hub according to the preamble of claim 1, (see, eg US-A-6 136 143 ).
  • Disc-shaped insert tool such as grinding or cutting wheels for angle grinders, usually consist entirely of bonded abrasive and have a central circular recess through which the insert tool with a clamping nut in the circumferential direction can be fixed positively and in the axial direction positively on an angle grinder spindle.
  • both tools which have a reinforcement of sheet metal in the region of the recess, as well as those without a reinforcement.
  • the invention relates to insert tool with the features of claim 1.
  • the abrasive and the hub are positively connected via connecting means at least in the direction of rotation.
  • An advantageous connection can be achieved by means of which large drive torques can be reliably transmitted from the hub to the abrasive.
  • a positive engagement in the axial direction is also conceivable, for example by angled and / or bent projections.
  • the positive engagement is structurally simple, without additional components with extending to the hub in the axial direction, the connecting means forming projections realized axially engage in or through the abrasive and advantageously in a punching process, for example, together with other recesses, are molded to the hub can.
  • An axial positive engagement can be carried out cost-effectively during pressing of the abrasive, in particular in the case of thin abrasives, by bending integrally formed projections or ribs which engage through the abrasive material.
  • the hub is designed with a bending stiffness that changes in the radial direction. It can achieve an advantageous transition between the abrasive and the hub and overall a harmonic bending line be achieved. It can be achieved an advantageous cohesion between the abrasive and the hub and a detachment when attaching the insert tool, for example on a spindle of an angle grinder, and safely avoided when working. Axial forces and resulting bending moments can be safely supported by a harmonic bending line.
  • a bending stiffness or bending line can be adapted to a desired course in a constructively simple way by the design of recesses introduced in the radially outer region of the hub.
  • the flexural rigidity of the hub can be specifically weakened in individual areas.
  • the recesses may have various forms that appear appropriate to those skilled in the art.
  • the recesses may be designed as slots with a constant width and / or with a radially inwardly continuously or stepwise decreasing width, whereby due to the radially outwardly decreasing hub material, the flexural rigidity decreases radially outward.
  • At least one recess has a greater width in the radially inner region than in the radially outer region, whereby an advantageously large attachment surface is provided in the radially outer region and a kind of spring region can be achieved in the radially inner region adjacent thereto ,
  • the recesses are advantageously designed to be open radially outward, whereby advantageously segments which can be deflected largely independently of one another can be achieved. In principle, however, the recesses could also be designed to be closed radially outwards.
  • the hub is advantageously inexpensive and environmentally friendly made of a sheet metal, especially sheet steel.
  • the abrasive which is often difficult to recycle, can be completely consumed and the hub can easily be recycled.
  • other hub materials are conceivable, such as plastics, ceramic materials, etc.
  • the hub is at least partially covered on both sides by at least one layer of the abrasive, for example by an abrasive material layer or glass fiber mats, etc., whereby the connection between the hub and the abrasive can be improved. It can be achieved a positive connection in both axial directions.
  • a connection between the hub and the abrasive may be further improved by subjecting the abrasive article and the hub together to undergo at least one heat process in a manufacturing process of the abrasive article, and / or the abrasive article in addition to a frictional and / or positive connection via a material connection with the Hub is connected, in particular via an adhesive connection.
  • the cohesive connection can be made after or during the manufacturing process of the abrasive. If the manufacturing process of the abrasive used to connect the hub and the abrasive, additional work steps can be saved and it can be achieved a total rational production process of the insert tool.
  • an adhesive process can be easily integrated into the manufacturing process of the abrasive, but other cohesive connections are conceivable, such as solder and / or welded joints, etc.
  • the solution according to the invention can be used in application tools which are fastened via a clamping nut on a spindle and particularly advantageous in the case of hubs which, in addition to a central recess, have recesses for fastening via a quick-release system.
  • forces occurring in the axial direction can be taken advantage of a harmonic bending line.
  • Fig. 1 shows an angle grinder 36 from above with a mounted in a housing 38, not shown electric motor.
  • the angle grinder 36 is over a first, in the housing 38 on the side facing away from an insert tool integrated, in the longitudinal direction extending handle 40 and a second to a transmission housing 42 in the area attached to the insert tool, extending transversely to the longitudinal direction handle 44 feasible.
  • Fig. 2 shows the insert tool of Fig. 1 in the disassembled state.
  • the insert tool has a rotatably driven disc-shaped hub 10 made of sheet steel, to which a grinding wheel forming abrasive 14 is attached in the radially outer region.
  • the abrasive article 14 is composed essentially of glass fiber mats, abrasives, and binders which are pressed together to form a solid disc, the binder being cured in a heat process.
  • the hub 10 is designed in the radial direction with a varying flexural rigidity, wherein the hub 10 is specifically weakened in its radially outer region for adjusting the bending stiffness by slot-shaped recesses 16.
  • the recesses 16 are designed to be open radially outwards, which advantageously results in segments that are largely deflectable independently of one another.
  • the recesses 16 have a constant width and protrude radially inward to just before a region in which recesses 30, 32 are introduced for fastening the insert tool via a quick-release system on an angle grinder spindle. In the central region of the hub 10, a circular recess 28 is introduced for centering the insert tool.
  • the hub 10 is covered on both sides by at least one layer 22, 24 of the abrasive 14, wherein on a side facing the angle grinder 36 side 48, the abrasive 14 with substantially its entire strength in an annular Indentation is arranged so that the hub 10 and the abrasive 14 advantageously complete in the direction of angle grinder 36 in a common plane. In the event that the abrasive 14 should come loose during operation of the hub 10, this is still in the direction away from the angle grinder 36 captive secured by the hub 10 ( Figures 2 and 4). On a side 34 facing away from the angle grinder 36, a layer 22 of the abrasive material 14 formed by a glass fiber mat covers the hub 10 radially inwards.
  • the abrasive 14 and the hub 10 are positively connected via connecting means 26 in the direction of rotation (FIG. 4).
  • the connecting means 26 are formed by extending in the axial direction, formed on the hub 10 projections which engage in or through the abrasive 14.
  • the projections 26 forming the connecting means are integrally formed with the recesses 16, 28, 30, 32 in a common punching process.
  • the hub 10 and the abrasive 14 are subjected to a common heat process, wherein a cohesive connection between the abrasive 14 and the hub 10, namely an adhesive bond is cured.
  • FIG. 5 an alternative hub 12 is shown.
  • Substantially identical components are basically numbered with the same reference numerals. Furthermore, reference may be made to the description of the embodiment in FIGS. 2 and 3 with regard to features and functions that are the same.
  • the hub 12 has recesses 18, 20, which are designed to be open radially outwards and which have different widths in the radial direction.
  • the recesses 18 are T-shaped and have in the radially inner region a greater width than in the radially outer region, whereas the recesses 20 are designed V-shaped and radially inwardly have a decreasing width.
  • the recesses 18 and 20 are combined with each other, but it is also conceivable to provide the recesses 18 or 20 each exclusively on a hub.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Einsatzwerkzeug mit einer rotierend antreibbaren, scheibenförmigen Nabe nach dem Oberbegriff des Anspruchs 1, (siehe z.B. US-A-6 136 143 ).The invention is based on an insert tool with a rotationally driven disc-shaped hub according to the preamble of claim 1, (see, eg US-A-6 136 143 ).

Scheibenförmiges Einsatzwerkzeug, z.B. Schleif- oder Trennscheiben für Winkelschleifer, bestehen üblicherweise zur Gänze aus gebundenem Schleifmittel und besitzen eine mittige kreisrunde Ausnehmung, über die das Einsatzwerkzeug mit einer Spannmutter in Umfangsrichtung kraftschlüssig und in axialer Richtung formschlüssig auf einer Winkelschleiferspindel befestigt werden kann. Es sind sowohl Einsatzwerkzeuge bekannt, die eine Verstärkung aus Blech im Bereich der Ausnehmung aufweisen, als auch solche ohne eine Verstärkung.Disc-shaped insert tool, such as grinding or cutting wheels for angle grinders, usually consist entirely of bonded abrasive and have a central circular recess through which the insert tool with a clamping nut in the circumferential direction can be fixed positively and in the axial direction positively on an angle grinder spindle. There are known both tools, which have a reinforcement of sheet metal in the region of the recess, as well as those without a reinforcement.

Vorteile der ErfindungAdvantages of the invention

Die Erfindung betrifft Einsatzwerkzeug mit den Merkmalen des Anspruchs 1.The invention relates to insert tool with the features of claim 1.

Es wird vorgeschlagen, daß das Schleifmittel und die Nabe über Verbindungsmittel zumindest in Drehrichtung formschlüssig verbunden sind. Es kann eine vorteilhafte Verbindung erreicht werden, über die große Antriebsmomente von der Nabe auf das Schleifmittel sicher übertragen werden können. Neben einem Formschluß in Drehrichtung ist ferner ein Formschluß in axialer Richtung denkbar, beispielsweise durch abgewinkelte und/oder gekröpfte Vorsprünge. Der Formschluß ist konstruktiv einfach, ohne zusätzliche Bauteile mit an die Nabe sich in axialer Richtung erstreckenden, die Verbindungsmittel bildenden Vorsprüngen realisierbar, die axial in oder durch das Schleifmittel greifen und vorteilhaft in einem Stanzprozeß, beispielsweise gemeinsam mit anderen Ausnehmungen, an die Nabe angeformt werden können. Ein axialer Formschluß kann insbesondere bei dünnen Schleifmitteln durch Umbiegen von angeformten, durch das Schleifmittel greifenden Vorsprüngen bzw. Zargen nach außen oder nach innen kostengünstig beim Verpressen des Schleifmittels erfolgen.It is proposed that the abrasive and the hub are positively connected via connecting means at least in the direction of rotation. An advantageous connection can be achieved by means of which large drive torques can be reliably transmitted from the hub to the abrasive. In addition to a positive connection in the direction of rotation, a positive engagement in the axial direction is also conceivable, for example by angled and / or bent projections. The positive engagement is structurally simple, without additional components with extending to the hub in the axial direction, the connecting means forming projections realized axially engage in or through the abrasive and advantageously in a punching process, for example, together with other recesses, are molded to the hub can. An axial positive engagement can be carried out cost-effectively during pressing of the abrasive, in particular in the case of thin abrasives, by bending integrally formed projections or ribs which engage through the abrasive material.

Ferner wird vorgeschlagen, daß die Nabe mit einer sich in radialer Richtung verändernder Biegesteifigkeit ausgeführt ist. Es kann ein vorteilhafter Übergang zwischen dem Schleifmittel und der Nabe erreicht und insgesamt eine harmonische Biegelinie erzielt werden. Es kann ein vorteilhafter Zusammenhalt zwischen dem Schleifmittel und der Nabe erreicht und ein Ablösen beim Befestigen des Einsatzwerkzeugs, beispielsweise auf einer Spindel eines Winkelschleifers, und beim Arbeiten sicher vermieden werden. Axiale Kräfte und daraus resultierende Biegemomente können über eine harmonische Biegelinie sicher abgestützt werden.It is also proposed that the hub is designed with a bending stiffness that changes in the radial direction. It can achieve an advantageous transition between the abrasive and the hub and overall a harmonic bending line be achieved. It can be achieved an advantageous cohesion between the abrasive and the hub and a detachment when attaching the insert tool, for example on a spindle of an angle grinder, and safely avoided when working. Axial forces and resulting bending moments can be safely supported by a harmonic bending line.

Eine Biegesteifigkeit bzw. Biegelinie kann konstruktiv einfach durch die Gestaltung von im radial äußeren Bereich der Nabe eingebrachten Ausnehmungen gezielt einem gewünschten Verlauf angepaßt werden. Die Biegesteifigkeit der Nabe kann gezielt in einzelnen Bereichen geschwächt werden. Die Ausnehmungen können verschiedene, dem Fachmann als sinnvoll erscheinende Formen aufweisen. Die Ausnehmungen können als Schlitze mit einer gleichbleibenden Breite und/oder mit einer radial nach innen kontinuierlich oder stufenweise abnehmenden Breite ausgeführt sein, wodurch aufgrund des radial nach außen abnehmenden Nabenmaterials die Biegesteifigkeit radial nach außen abnimmt.A bending stiffness or bending line can be adapted to a desired course in a constructively simple way by the design of recesses introduced in the radially outer region of the hub. The flexural rigidity of the hub can be specifically weakened in individual areas. The recesses may have various forms that appear appropriate to those skilled in the art. The recesses may be designed as slots with a constant width and / or with a radially inwardly continuously or stepwise decreasing width, whereby due to the radially outwardly decreasing hub material, the flexural rigidity decreases radially outward.

In einer weiteren Ausgestaltung der Erfindung wird vorgeschlagen, daß zumindest eine Ausnehmung im radial inneren Bereich eine größere Breite aufweist als im radial äußeren Bereich, wodurch im radial äußeren Bereich eine vorteilhaft große Befestigungsfläche bereitgestellt und im daran angrenzenden radial inneren Bereich eine Art Federbereich erreicht werden kann. Die Ausnehmungen werden vorteilhaft radial nach außen offen ausgeführt, wodurch vorteilhaft weitgehend voneinander unabhängig auslenkbare Segmente erreicht werden können. Grundsätzlich könnten die Ausnehmungen jedoch auch radial nach außen geschlossen ausgeführt sein.In a further embodiment of the invention, it is proposed that at least one recess has a greater width in the radially inner region than in the radially outer region, whereby an advantageously large attachment surface is provided in the radially outer region and a kind of spring region can be achieved in the radially inner region adjacent thereto , The recesses are advantageously designed to be open radially outward, whereby advantageously segments which can be deflected largely independently of one another can be achieved. In principle, however, the recesses could also be designed to be closed radially outwards.

Anstatt Ausnehmungen sind auch andere, dem Fachmann als sinnvoll erscheinende konstruktive Ausgestaltungen zur Erreichung einer bestimmten Biegelinie denkbar, wie beispielsweise Ausgestaltungen mit radial nach außen zu- oder abnehmenden Materialstärken, unterschiedlichen Anzahlen von Materiallagen, unterschiedlichen Materialien mit unterschiedlicher Steifigkeit und/oder mit Versteifungsrippen zum Einstellen einer gewünschten Biegelinie. Ferner sind Materialien denkbar, die radial nach außen unterschiedlichen Materialbehandlungen unterzogen wurden.Instead of recesses are also other, the skilled person appear reasonable constructive designs to achieve a certain bending line conceivable, such as configurations with radially outwardly increasing or decreasing material thicknesses, different numbers of material layers, different materials with different stiffness and / or with stiffening ribs for setting a desired bending line. Furthermore, materials are conceivable which have undergone different material treatments radially outward.

Die Nabe ist vorteilhaft kostengünstig und umweltfreundlich aus einem Blech, insbesondere Stahlblech, hergestellt. Das häufig nur schwer wieder recycelbare Schleifmittel kann vollständig verbraucht und die Nabe kann einfach recycelt werden. Grundsätzlich sind jedoch auch andere Nabenmaterialien denkbar, wie beispielsweise Kunststoffe, keramische Materialien usw.The hub is advantageously inexpensive and environmentally friendly made of a sheet metal, especially sheet steel. The abrasive, which is often difficult to recycle, can be completely consumed and the hub can easily be recycled. In principle, however, other hub materials are conceivable, such as plastics, ceramic materials, etc.

In einer weiteren Ausgestaltung der Erfindung wird vorgeschlagen, daß die Nabe beidseitig zumindest von einer Lage des Schleifmittels zumindest teilweise überdeckt ist, beispielsweise von einer abrasive Stoffe tragenden Gewebeschicht oder Glasfasermatten usw., wodurch die Verbindung zwischen der Nabe und dem Schleifmittel verbessert werden kann. Es kann ein Formschluß in beide axiale Richtungen erreicht werden.In a further embodiment of the invention, it is proposed that the hub is at least partially covered on both sides by at least one layer of the abrasive, for example by an abrasive material layer or glass fiber mats, etc., whereby the connection between the hub and the abrasive can be improved. It can be achieved a positive connection in both axial directions.

Eine Verbindung zwischen der Nabe und dem Schleifmittel kann ferner verbessert werden, indem bei einem Herstellprozeß des Schleifmittels das Schleifmittel und die Nabe gemeinsam zumindest einem Hitzeprozeß unterzogen werden, und/oder das Schleifmittel neben einer kraftschlüssigen und/oder formschlüssigen Verbindung über eine stoffschlüssige Verbindung mit der Nabe verbunden ist, wie insbesondere über eine Klebeverbindung. Die stoffschlüssige Verbindung kann nach oder während dem Herstellprozeß des Schleifmittels hergestellt werden. Wird der Herstellprozeß des Schleifmittels zur Verbindung der Nabe und des Schleifmittels genutzt, können zusätzliche Arbeitsschritte eingespart und es kann ein insgesamt rationeller Herstellprozeß des Einsatzwerkzeugs erreicht werden. Insbesondere ein Klebevorgang kann einfach in den Herstellprozeß des Schleifmittels integriert werden, wobei jedoch auch andere stoffschlüssige Verbindungen denkbar sind, wie beispielsweise Löt- und/oder Schweißverbindungen usw.A connection between the hub and the abrasive may be further improved by subjecting the abrasive article and the hub together to undergo at least one heat process in a manufacturing process of the abrasive article, and / or the abrasive article in addition to a frictional and / or positive connection via a material connection with the Hub is connected, in particular via an adhesive connection. The cohesive connection can be made after or during the manufacturing process of the abrasive. If the manufacturing process of the abrasive used to connect the hub and the abrasive, additional work steps can be saved and it can be achieved a total rational production process of the insert tool. In particular, an adhesive process can be easily integrated into the manufacturing process of the abrasive, but other cohesive connections are conceivable, such as solder and / or welded joints, etc.

Die erfindungsgemäße Lösung kann bei Einsatzwerkzeugen eingesetzt werden, die über eine Spannmutter auf einer Spindel befestigt werden und besonders vorteilhaft bei Naben, die neben einer mittigen Ausnehmung Ausnehmungen zur Befestigung über ein Schnellspannsystem aufweisen. Bei der Montage auf einer Spindel können auftretende Montagekräfte in axialer Richtung über eine harmonische Biegelinie vorteilhaft aufgenommen werden.The solution according to the invention can be used in application tools which are fastened via a clamping nut on a spindle and particularly advantageous in the case of hubs which, in addition to a central recess, have recesses for fastening via a quick-release system. When mounting on a spindle assembly forces occurring in the axial direction can be taken advantage of a harmonic bending line.

Zeichnungdrawing

Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Es zeigen:

Fig. 1
einen schematisch dargestellten Minkelschleifer von oben,
Fig. 2
ein erfindungsgemäßes Einsatzwerkzeug,
Fig. 3
eine vergrößerte Darstellung einer Nabe ohne Schleifmittel von oben,
Fig. 4
die Nabe aus Fig. 3 in einer Seitenansicht und
Fig. 5
eine Alternative zu Fig. 3.
Show it:
Fig. 1
a schematically illustrated Minkelschleifer from above,
Fig. 2
an inventive insert tool,
Fig. 3
an enlarged view of a hub without abrasives from above,
Fig. 4
the hub of Fig. 3 in a side view and
Fig. 5
an alternative to FIG. 3.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Fig. 1 zeigt einen Winkelschleifer 36 von oben mit einem in einem Gehäuse 38 gelagerten, nicht näher dargestellten Elektromotor. Der Winkelschleifer 36 ist über einen ersten, im Gehäuse 38 auf der einem Einsatzwerkzeug abgewandten Seite integrierten, sich in Längsrichtung erstreckenden Handgriff 40 und über einen zweiten an einem Getriebegehäuse 42 im Bereich des Einsatzwerkzeugs befestigten, sich quer zur Längsrichtung erstreckenden Handgriff 44 führbar.Fig. 1 shows an angle grinder 36 from above with a mounted in a housing 38, not shown electric motor. The angle grinder 36 is over a first, in the housing 38 on the side facing away from an insert tool integrated, in the longitudinal direction extending handle 40 and a second to a transmission housing 42 in the area attached to the insert tool, extending transversely to the longitudinal direction handle 44 feasible.

Fig. 2 zeigt das Einsatzwerkzeug aus Fig. 1 im demontierten Zustand. Das Einsatzwerkzeug besitzt eine rotierend antreibbare, scheibenförmige Nabe 10 aus Stahlblech, an der im radial äußeren Bereich ein eine Schleifscheibe bildendes Schleifmittel 14 befestigt ist. Das Schleifmittel 14 ist im wesentlichen aus Glasfasermatten, Schleifmittel und Bindemittel zusammengesetzt, die zu einer festen Scheibe miteinander verpreßt sind, wobei das Bindemittel in einem Hitzeprozeß ausgehärtet wurde.Fig. 2 shows the insert tool of Fig. 1 in the disassembled state. The insert tool has a rotatably driven disc-shaped hub 10 made of sheet steel, to which a grinding wheel forming abrasive 14 is attached in the radially outer region. The abrasive article 14 is composed essentially of glass fiber mats, abrasives, and binders which are pressed together to form a solid disc, the binder being cured in a heat process.

Die Nabe 10 ist in radialer Richtung mit einer sich verändernden Biegesteifigkeit ausgeführt, wobei die Nabe 10 in ihrem radial äußeren Bereich zur Anpassung der Biegesteifigkeit durch schlitzförmige Ausnehmungen 16 gezielt geschwächt ist. Die Ausnehmungen 16 sind radial nach außen offen ausgeführt, wodurch vorteilhaft weitgehend voneinander unabhängig auslenkbare Segmente entstehen. Die Ausnehmungen 16 besitzen eine gleichbleibende Breite und ragen radial nach innen bis kurz vor einen Bereich, in den Ausnehmungen 30, 32 zur Befestigung des Einsatzwerkzeugs über ein Schnellspannsystem auf einer Winkelschleiferspindel eingebracht sind. Im mittleren Bereich der Nabe 10 ist eine kreisrunde Ausnehmung 28 zur Zentrierung des Einsatzwerkzeugs eingebracht.The hub 10 is designed in the radial direction with a varying flexural rigidity, wherein the hub 10 is specifically weakened in its radially outer region for adjusting the bending stiffness by slot-shaped recesses 16. The recesses 16 are designed to be open radially outwards, which advantageously results in segments that are largely deflectable independently of one another. The recesses 16 have a constant width and protrude radially inward to just before a region in which recesses 30, 32 are introduced for fastening the insert tool via a quick-release system on an angle grinder spindle. In the central region of the hub 10, a circular recess 28 is introduced for centering the insert tool.

Die Nabe 10 ist beidseitig von zumindest einer Lage 22, 24 des Schleifmittels 14 überdeckt, wobei auf einer dem Winkelschleifer 36 zugewandten Seite 48 das Schleifmittel 14 mit im wesentlichen seiner gesamten Stärke in einer ringförmigen Einbuchtung angeordnet ist, so daß die Nabe 10 und das Schleifmittel 14 vorteilhaft in Richtung Winkelschleifer 36 in einer gemeinsamen Ebene abschließen. Im Falle, daß sich das Schleifmittel 14 im Betrieb von der Nabe 10 lösen sollte, ist dieses dennoch in die vom Winkelschleifer 36 abgewandte Richtung verliersicher durch die Nabe 10 gesichert(Fig. 2 und 4). Auf einer dem Winkelschleifer 36 abgewandten Seite 34 überdeckt eine von einer Glasfasermatte gebildete Lage 22 des Schleifmittels 14 die Nabe 10 radial nach innen.The hub 10 is covered on both sides by at least one layer 22, 24 of the abrasive 14, wherein on a side facing the angle grinder 36 side 48, the abrasive 14 with substantially its entire strength in an annular Indentation is arranged so that the hub 10 and the abrasive 14 advantageously complete in the direction of angle grinder 36 in a common plane. In the event that the abrasive 14 should come loose during operation of the hub 10, this is still in the direction away from the angle grinder 36 captive secured by the hub 10 (Figures 2 and 4). On a side 34 facing away from the angle grinder 36, a layer 22 of the abrasive material 14 formed by a glass fiber mat covers the hub 10 radially inwards.

Das Schleifmittel 14 und die Nabe 10 sind über Verbindungsmittel 26 in Drehrichtung formschlüssig verbunden (Fig. 4). Die Verbindungsmittel 26 werden von sich in axialer Richtung erstreckenden, an die Nabe 10 angeformten Vorsprüngen gebildet, die in bzw. durch das Schleifmittel 14 greifen. Die die Verbindungsmittel 26 bildenden Vorsprünge werden mit den Ausnehmungen 16, 28, 30, 32 in einem gemeinsamen Stanzprozeß angeformt.The abrasive 14 and the hub 10 are positively connected via connecting means 26 in the direction of rotation (FIG. 4). The connecting means 26 are formed by extending in the axial direction, formed on the hub 10 projections which engage in or through the abrasive 14. The projections 26 forming the connecting means are integrally formed with the recesses 16, 28, 30, 32 in a common punching process.

Beim Herstellprozeß des Schleifmittels 14 werden die Nabe 10 und das Schleifmittel 14 einem gemeinsamen Hitzeprozeß unterzogen, wobei eine stoffschlüssige Verbindung zwischen dem Schleifmittel 14 und der Nabe 10, und zwar eine Klebeverbindung ausgehärtet wird.In the manufacturing process of the abrasive 14, the hub 10 and the abrasive 14 are subjected to a common heat process, wherein a cohesive connection between the abrasive 14 and the hub 10, namely an adhesive bond is cured.

In Fig. 5 ist eine alternative Nabe 12 dargestellt. Im wesentlichen gleichbleibende Bauteile sind grundsätzlich mit den gleichen Bezugszeichen beziffert. Ferner kann bezüglich gleichbleibender Merkmale und Funktionen auf die Beschreibung zum Ausführungsbeispiel in den Fig. 2 und 3 verwiesen werden.In Fig. 5, an alternative hub 12 is shown. Substantially identical components are basically numbered with the same reference numerals. Furthermore, reference may be made to the description of the embodiment in FIGS. 2 and 3 with regard to features and functions that are the same.

Die Nabe 12 besitzt Ausnehmungen 18, 20, die radial nach außen offen ausgeführt sind und die in radialer Richtung unterschiedliche Breiten aufweisen. Die Ausnehmungen 18 sind T-förmig ausgeführt und besitzen im radial inneren Bereich eine größere Breite als im radial äußeren Bereich, wogegen die Ausnehmungen 20 V-förmig ausgeführt sind und radial nach innen eine abnehmende Breite aufweisen. In Fig. 5 sind die Ausnehmungen 18 und 20 miteinander kombiniert, wobei jedoch auch denkbar ist, die Ausnehmungen 18 oder 20 jeweils ausschließlich an einer Nabe vorzusehen.The hub 12 has recesses 18, 20, which are designed to be open radially outwards and which have different widths in the radial direction. The recesses 18 are T-shaped and have in the radially inner region a greater width than in the radially outer region, whereas the recesses 20 are designed V-shaped and radially inwardly have a decreasing width. In Fig. 5, the recesses 18 and 20 are combined with each other, but it is also conceivable to provide the recesses 18 or 20 each exclusively on a hub.

Bezugszeichenreference numeral

1010
Nabehub
1212
Nabehub
1414
Schleifmittelabrasive
1616
Ausnehmungrecess
1818
Ausnehmungrecess
2020
Ausnehmungrecess
2222
Lagelocation
2424
Lagelocation
2626
Verbindungsmittelconnecting means
2828
Ausnehmungrecess
3030
Ausnehmungrecess
3232
Ausnehmungrecess
3434
Seitepage
3636
Winkelschleiferangle
3838
Gehäusecasing
4040
Handgriffhandle
4242
Getriebegehäusegearbox
4444
Handgriffhandle
4646
Einbuchtungindentation
4848
Seitepage

Claims (13)

  1. Application tool with a rotationally drivable, disc-shaped hub (10, 12), to which an abrasive (14) forming a cutting-off disc, grinding disc, roughing disc or cutting disc is fastened in the radially outer region, the abrasive (14) and the hub (10, 12) being connected in a positive-locking manner via connecting means (26) at least in the direction of rotation, characterized in that the hub (10, 12) has, in addition to a central aperture (28), apertures (30, 32) for fastening to a spindle via a quick-action clamping system.
  2. Application tool according to Claim 1, characterized in that projections extending in the axial direction and forming the connecting means (26) are integrally formed on the hub (10, 12) and engage in or through the abrasive (14).
  3. Application tool according to Claim 1 or 2, characterized in that the abrasive and the hub are connected in a positive-locking manner in the axial direction via at least one connecting means.
  4. Application tool according to one of the preceding claims, characterized in that the hub (10, 12) is designed with flexural rigidity varying in the radial direction.
  5. Application tool according to Claim 4, characterized in that apertures (16, 18, 20) for adapting the flexural rigidity are incorporated in the radially outer region of the hub (10, 12).
  6. Application tool according to Claim 5', characterized in that at least individual apertures (16, 18, 20) are designed to open radially outwards.
  7. Application tool according to Claim 5 or 6, characterized in that at least one aperture (20) has a smaller width in the radially inner region than in the radially outer region.
  8. Application tool according to one of Claims 5 to 7, characterized in that at least one aperture (18) has a larger width in the radially inner region than in the radially outer region.
  9. Application tool according to one of the preceding claims, characterized in that the hub (10, 12) is formed from metal sheet.
  10. Application tool according to one of the preceding claims, characterized in that the hub (10, 12) is at least partly covered on both sides at least by one layer (22, 24) of the abrasive (14).
  11. Application tool according to one of the preceding claims, characterized in that, during a process for producing the abrasive (14), the abrasive (14) and the hub (10, 12) are jointly subjected to at least one heating process.
  12. Application tool according to one of the preceding claims, characterized in that the abrasive (14) and the hub (10, 12) are connected via an integral connection.
  13. Application tool according to Claim 12, characterized in that the abrasive (14) and the hub (10, 12) are adhesively bonded.
EP02704602A 2001-02-15 2002-01-23 Heavy-duty tool with a rotationally driven, disk-shaped hub Expired - Lifetime EP1361935B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10106979A DE10106979A1 (en) 2001-02-15 2001-02-15 Tool with a rotating, disc-shaped hub
DE10106979 2001-02-15
PCT/DE2002/000202 WO2002064316A1 (en) 2001-02-15 2002-01-23 Heavy-duty tool with a rotationally driven, disk-shaped hub

Publications (2)

Publication Number Publication Date
EP1361935A1 EP1361935A1 (en) 2003-11-19
EP1361935B1 true EP1361935B1 (en) 2007-10-10

Family

ID=7674100

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02704602A Expired - Lifetime EP1361935B1 (en) 2001-02-15 2002-01-23 Heavy-duty tool with a rotationally driven, disk-shaped hub

Country Status (8)

Country Link
US (1) US6902471B2 (en)
EP (1) EP1361935B1 (en)
JP (1) JP2004517749A (en)
KR (1) KR20030014665A (en)
CN (1) CN100431794C (en)
DE (2) DE10106979A1 (en)
MY (1) MY133293A (en)
WO (1) WO2002064316A1 (en)

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USD653523S1 (en) 2010-09-29 2012-02-07 Milwaukee Electric Tool Corporation Adapter for a tool
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Also Published As

Publication number Publication date
US6902471B2 (en) 2005-06-07
KR20030014665A (en) 2003-02-19
US20030176153A1 (en) 2003-09-18
MY133293A (en) 2007-11-30
DE50211041D1 (en) 2007-11-22
CN1457285A (en) 2003-11-19
JP2004517749A (en) 2004-06-17
EP1361935A1 (en) 2003-11-19
CN100431794C (en) 2008-11-12
WO2002064316A1 (en) 2002-08-22
DE10106979A1 (en) 2002-09-05

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