EP0557773A1 - Multi-layered back-up pad for sanding disc - Google Patents

Multi-layered back-up pad for sanding disc Download PDF

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Publication number
EP0557773A1
EP0557773A1 EP93101920A EP93101920A EP0557773A1 EP 0557773 A1 EP0557773 A1 EP 0557773A1 EP 93101920 A EP93101920 A EP 93101920A EP 93101920 A EP93101920 A EP 93101920A EP 0557773 A1 EP0557773 A1 EP 0557773A1
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EP
European Patent Office
Prior art keywords
driver
grinding
output shaft
grinding plate
arrangement according
Prior art date
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Granted
Application number
EP93101920A
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German (de)
French (fr)
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EP0557773B1 (en
Inventor
Klaus Wurst
Julian Dipl.-Ing. Pfaundler (Fh)
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
    • B24D9/08—Circular back-plates for carrying flexible material
    • 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
    • B24B45/00—Means for securing grinding wheels on rotary arbors

Definitions

  • the invention relates to a sanding disc according to the preamble of claim 1.
  • a generic grinding plate which is provided with a central, pin-like, non-releasable head piece which is connected via a thread to the free end of the output shaft of a grinding machine.
  • the head piece is in the form of a disk approximately two thirds of the size of the grinding plate, which runs to the center of the grinding plate in a central pin with a central bore.
  • the free end of the output shaft protrudes into the bore.
  • This configuration of the head piece makes the sanding plate relatively heavy. Due to the large mass, even small irregularities in the mass distribution have an effect - i.e. Unbalance - extremely strong on the vibration behavior of the grinding plate. Therefore, this grinding plate must be particularly carefully balanced, which is complicated by the fact that the grinding plate must be screwed onto a long threaded pin before it can be operated at the intended minimum speed.
  • the grinding plate according to the invention with the characteristic features of claim 1 has the advantage that it is lighter and self-centered exactly with respect to the output shaft, so that no unbalance can occur. This affects the lifespan of the sanding plate and also the grinding machine that is operated with this sanding plate.
  • FIG. 1 shows a first exemplary embodiment of a grinding plate with driving shaft
  • FIG. 2 shows a perspective, exploded view of the first exemplary embodiment
  • FIG. 3 shows a top view of the first exemplary embodiment
  • FIG. 4 shows a second exemplary embodiment of a grinding plate with driving element
  • FIG. 5 shows a perspective illustration of a Driver according to Figure 4.
  • the centrally cut grinding plate 1 shown in FIG. 1 consists of a support plate 3 arranged on its upper side, a cushion 5 arranged on its underside, between which a perforated steel disk 7 serving as a reinforcing part is arranged.
  • the cushion 5 carries on its underside a Velcro fastener 9, which is suitable for holding abrasive sheets (not shown) with a velor back or for receiving further intermediate pillows (not shown) with a velor back and Velcro fastener.
  • the grinding plate 1 has a plurality of axial openings which serve as dust extraction openings 11 and not with the suction channels shown are assigned to remove the grinding dust.
  • a central through bore 13 is aligned with a bore 15 in the steel disk 7 for the passage of a screw 17, with which the grinding plate 1 can be coupled to the grinding machine output shaft so that it can be taken along.
  • the cushion 5 has a central recess 19 so that the underside of the steel disc 7 is exposed and the head of the screw 17 can come to rest against it.
  • the central recess 19 can be connected to the dust extraction openings 11 by means of radial channels (not shown) in the cushion 5 and thereby serve to remove the dust.
  • the support plate 3 carries on its upper side a collar which is arranged concentrically around the through hole 13 and which serves as a centering ring 21.
  • the support plate 3 and the steel disk 7 concentrically with the through hole 13 on a common pitch circle three continuous recesses, which serve as tooth engagement holes 23.
  • the support plate 3 On its underside, the support plate 3 carries a plurality of annular ribs 35 of different diameters which merge into one another and a plurality of radial ribs which cross the circular ribs and connect them to one another.
  • a driver 25, to be axially coupled to the grinding machine output shaft, not shown, consists of a driver shaft 27, which widens on its side facing the grinding plate 1 to a plate-like tooth carrier 29, which has three axially projecting teeth 31 on its circumference.
  • the driver 25 is provided with a central threaded bore 33 into which the screw 17 can be screwed in order to hold the grinding plate 1 axially on the driver 25.
  • the grinding plate 1 is coupled to the driver 25 in the following way:
  • the driver 25 is placed in the centering ring 21 on the upper side of the support plate 3 in such a way that the teeth 31 enter the tooth engagement bores 23 and by means of positive engagement with the driver 25, the grinding plate is rotated 1 effect.
  • the inner diameter of the three-part centering ring 21 is only slightly larger than the outer diameter of the Zannnum 29, so that the driver 25 is centered when coupled to the grinding plate 1, radially tightly gripped, arranged and axially fixed by the screw 17 in this position.
  • the centering ring 21 also serves as a reinforcing rib on the top of the support plate 3.
  • the exploded view of the exemplary embodiment according to FIG. 1 shown in FIG. 2 illustrates the arrangement and functioning of the teeth 31 with the tooth engagement bores 23. It is also clear that the steel disc 7 is continuously penetrated by the tooth engagement bores 23 and the central through bore 13 and that it acts as a captive washer and as a stiffening part for the grinding plate 1 at the same time. In addition, the steel disc 7 can absorb transmission forces of the teeth 31 and transmit them gently to the grinding plate 1.
  • the top view of the grinding plate 1 shown in FIG. 3 shows that the centering ring 21 is divided into three ring segments 23.
  • the segmentation of the centering ring 21 can be explained by the arrangement of the three tooth engagement bores 23 beyond the inner diameter of the centering ring 21, by an engagement in the contour thereof.
  • the exemplary embodiment of a grinding plate 41 shown in FIG. 4 differs from that of FIGS. 1, 2 and 3 primarily by the configuration of the coupling area between the grinding plate 41 and the grinding machine output shaft or by the configuration of the centering ring 61 and the driver 65 1
  • the sanding plate 41 is composed of: support plate 43, cushion 45, steel disc 47, Velcro fastener 9, dust extraction openings 51, central through-hole 53, hole 55, screw 57, central recess 59, centering ring 61.
  • the driver 65 is composed of: driver shaft 67, tooth carrier 69, tooth 71, threaded bores 73.
  • the centering ring 61 has a conical surface 62 on the inside, which is profiled like a gearwheel and into which the bevel gearwheel-shaped conical surface on the end face 64 of the driver 65 can be positioned, self-centering.
  • the cone surface 62 is dimensioned such that when the driver 65 is inserted, a cavity 66 remains, into which, depending on the state of wear of the cone surface 62 or depending on the pretensioning force caused by the screw 57, the driver 65 can plunge more or less deeply.
  • the cavity 66 also forms an escape space for grinding dust that may accumulate, to which dust ejection openings (not shown) are connected.
  • the steel washer 47 is designed here only as a washer and is captively pressed, foamed or glued into the central recess 59. The steel disc 47 is not used here for the rotary driving between the driver 65 and the grinding plate 41.
  • the driver is shown in perspective as a detail and illustrates its bevel gear-like configuration in the manner of a negative impression of the conical surface 62 of the centering ring 61.
  • the tooth flanks or impressions 63 of the conical surfaces 62 shown here arched can also be designed as right-angled notches if particularly high torques are to be transmitted from the output shaft to the grinding plate 41.
  • a rib-like configuration of the support plate 43 analogous to FIG. 1 is not shown.
  • the grinding plate has only two tooth engagement holes and the centering ring of the grinding plate is divided in the vicinity of the tooth engagement holes and consists of two segments.
  • the associated driver carries two axially projecting teeth in accordance with the number of two tooth engagement bores, the reasonable minimum number for a reliable function and simple manufacture of the driver.
  • the driver is freely rotatably coupled to the grinding machine shaft or to an eccentric pin that is rotationally fixedly coupled to it via a roller bearing.

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

Abstract

In the case of an arrangement for driving a back-up pad (1, 41) on a driven shaft of a grinding or sanding machine, in particular hand-operated grinding or sanding machine, mounting and operating with the back-up pad are improved in that the back-up pad (1, 41) is centred automatically on the driven shaft, in particular on a driver (25, 65). <IMAGE>

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Schleifteller nach der Gattung des Anspruchs 1.The invention relates to a sanding disc according to the preamble of claim 1.

Durch die DE-OS 27 59 694 ist ein gattungsgemäßer Schleifteller bekannt, der mit einem zentrischen, zapfenartigen, nicht lösbaren Kopfstück versehen ist, das über ein Gewinde mit dem freien Ende der Abtriebswelle einer Schleifmaschine verbunden wird. Das Kopfstück hat die Form einer Scheibe in der Größe von etwa zwei Dritteln der Fläche des Schleiftellers, die zur Mitte des Schleiftellers in einen zentralen Zapfen mit einer zentralen Bohrung verläuft. In die Bohrung ragt das freie Ende der Abtriebswelle. Durch diese Ausgestaltung des Kopfstückes wird der Schleifteller verhältnismäßig schwer. Aufgrund der großen Masse wirken sich bereits kleine Ungleichmäßigkeiten bei der Masseverteilung - d.h. Unwuchten - außerordentlich stark auf das Schwingungsverhalten des Schleiftellers aus. Deshalb muß dieser Schleifteller also besonders gründlich ausgewuchtet werden, was dadurch erschwert ist, daß der Schleifteller auf einen langen Gewindezapfen geschraubt werden muß, bevor er mit der vorgesehenen Mindestdrehzahl betrieben werden kann.From DE-OS 27 59 694 a generic grinding plate is known, which is provided with a central, pin-like, non-releasable head piece which is connected via a thread to the free end of the output shaft of a grinding machine. The head piece is in the form of a disk approximately two thirds of the size of the grinding plate, which runs to the center of the grinding plate in a central pin with a central bore. The free end of the output shaft protrudes into the bore. This configuration of the head piece makes the sanding plate relatively heavy. Due to the large mass, even small irregularities in the mass distribution have an effect - i.e. Unbalance - extremely strong on the vibration behavior of the grinding plate. Therefore, this grinding plate must be particularly carefully balanced, which is complicated by the fact that the grinding plate must be screwed onto a long threaded pin before it can be operated at the intended minimum speed.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße Schleifteller mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß er leichter ist und sich selbsttätig, genau bezüglich der Abtriebswelle zentriert, so daß keine Unwuchten entstehen können. Dies wirkt sich auf die Lebensdauer des Schleiftellers und auch der Schleifmaschine aus, die mit diesem Schleifteller betrieben wird.The grinding plate according to the invention with the characteristic features of claim 1 has the advantage that it is lighter and self-centered exactly with respect to the output shaft, so that no unbalance can occur. This affects the lifespan of the sanding plate and also the grinding machine that is operated with this sanding plate.

Weitere, vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.Further advantageous embodiments of the invention result from the dependent claims.

Zeichnungdrawing

Ausführungsbeispiele der Erfindung sind in der nachfolgenden Beschreibung anhand der zugehörigen Zeichnung näher erläutert. Es zeigen Figur 1 ein erstes Ausführungsbeispiel eines Schleiftellers mit Mitnehmerschaft, Figur 2 eine perspektivische, auseinandergezogene Ansicht des ersten Ausführungsbeispiels, die Figur 3 eine Draufsicht auf das erste Ausführungsbeispiels, Figur 4 ein zweites Ausführungsbeispiel eines Schleiftellers mit Mitnehmer und die Figur 5 eine perspektivische Darstellung eines Mitnehmers gemäß Figur 4.Exemplary embodiments of the invention are explained in more detail in the following description with reference to the accompanying drawing. FIG. 1 shows a first exemplary embodiment of a grinding plate with driving shaft, FIG. 2 shows a perspective, exploded view of the first exemplary embodiment, FIG. 3 shows a top view of the first exemplary embodiment, FIG. 4 shows a second exemplary embodiment of a grinding plate with driving element, and FIG. 5 shows a perspective illustration of a Driver according to Figure 4.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Der in Figur 1 dargestellte, mittig geschnittene Schleifteller 1 besteht aus einer an seiner Oberseite angeordneten Stützplatte 3, einem auf seiner Unterseite angeordneten Kissen 5, zwischen denen eine als Verstärkungsteil dienende, gelochte Stahlscheibe 7 angeordnet ist. Das Kissen 5 trägt auf seiner Unterseite einen Klettverschluß 9, der zum Festhalten nicht dargestellter Schleifblätter mit Velourrücken bzw. zum Aufnehmen weiterer nicht dargestellter Zwischenkissen mit Velourrücken und Klettverschluß geeignet ist.The centrally cut grinding plate 1 shown in FIG. 1 consists of a support plate 3 arranged on its upper side, a cushion 5 arranged on its underside, between which a perforated steel disk 7 serving as a reinforcing part is arranged. The cushion 5 carries on its underside a Velcro fastener 9, which is suitable for holding abrasive sheets (not shown) with a velor back or for receiving further intermediate pillows (not shown) with a velor back and Velcro fastener.

Der Schleifteller 1 weist mehrere, axiale Durchbrüche auf, die als Staubabsaugöffnungen 11 dienen und nicht mit dargestellten Absaugkanälen zum Abführen des Schleifstaubes zugeordnet sind.The grinding plate 1 has a plurality of axial openings which serve as dust extraction openings 11 and not with the suction channels shown are assigned to remove the grinding dust.

Eine zentrale Durchgangsbohrung 13, fluchtet mit einer Bohrung 15 in der Stahlscheibe 7 zum Durchtritt einer Schraube 17, mit der der Schleifteller 1 zur Mitnahme durch eine nicht dargestellte Schleifmaschinenabtriebswelle mit dieser gekoppelt werden kann. Das Kissen 5 weist eine zentrale Ausnehmung 19 auf, so daß die Unterseite der Stahlscheibe 7 freiliegt und der Kopf der Schraube 17 daran zur Anlage gelangen kann.A central through bore 13 is aligned with a bore 15 in the steel disk 7 for the passage of a screw 17, with which the grinding plate 1 can be coupled to the grinding machine output shaft so that it can be taken along. The cushion 5 has a central recess 19 so that the underside of the steel disc 7 is exposed and the head of the screw 17 can come to rest against it.

Durch radiale, nicht dargestellte Kanäle im Kissen 5 kann die zentrale Ausnehmung 19 mit den Staubabsaugöffnungen 11 verbunden sein und dadurch dem Staubabtransport dienen.The central recess 19 can be connected to the dust extraction openings 11 by means of radial channels (not shown) in the cushion 5 and thereby serve to remove the dust.

Die Stützplatte 3 trägt auf ihrer Oberseite einen konzentrisch um die Durchgangsbohrung 13 angeordneten Bund, der als Zentrierring 21 dient. Außerdem trägt die Stützplatte 3 und die Stahlscheibe 7 konzentrisch zur Durchgangsbohrung 13 auf einem gemeinsamen Teilkreis drei durchgehende Ausnehmungen, die als Zahneingriffsbohrungen 23 dienen.The support plate 3 carries on its upper side a collar which is arranged concentrically around the through hole 13 and which serves as a centering ring 21. In addition, the support plate 3 and the steel disk 7 concentrically with the through hole 13 on a common pitch circle three continuous recesses, which serve as tooth engagement holes 23.

Auf ihrer Unterseite trägt die Stützplatte 3 mehrere ringförmige, ineinander übergehende Rippen 35 unterschiedlichen Durchmessers sowie mehrere radiale Rippen, die die kreisförmigen Rippen kreuzen und diese miteinander verbinden.On its underside, the support plate 3 carries a plurality of annular ribs 35 of different diameters which merge into one another and a plurality of radial ribs which cross the circular ribs and connect them to one another.

Ein Mitnehmer 25, axial anzukoppeln an die nicht dargestellte Schleifmaschinenabtriebswelle, besteht aus einem Mitnehmerschaft 27, der sich auf seiner dem Schleifteller 1 zugewandten Seite zu einem plattenartigen Zahnträger 29 verbreitert, der an seinem Umfang drei axial vorspringende Zähne 31 trägt. Der Mitnehmer 25 ist mit einer zentralen Gewindebohrung 33 versehen, in die die Schraube 17 geschraubt werden kann, um dabei den Schleifteller 1 axial am Mitnehmer 25 festzuhalten.A driver 25, to be axially coupled to the grinding machine output shaft, not shown, consists of a driver shaft 27, which widens on its side facing the grinding plate 1 to a plate-like tooth carrier 29, which has three axially projecting teeth 31 on its circumference. The driver 25 is provided with a central threaded bore 33 into which the screw 17 can be screwed in order to hold the grinding plate 1 axially on the driver 25.

Der Schleifteller 1 wird auf folgende Weise mit dem Mitnehmer 25 gekoppelt: Der Mitnehmer 25 wird so in den Zentrierring 21 auf der Oberseite der Stützplatte 3 gesetzt, daß in die Zahneingriffsbohrungen 23 die Zähne 31 eintreten und durch Formschluß mit dem Mitnehmer 25 eine Drehmitnahme des Schleiftellers 1 bewirken.The grinding plate 1 is coupled to the driver 25 in the following way: The driver 25 is placed in the centering ring 21 on the upper side of the support plate 3 in such a way that the teeth 31 enter the tooth engagement bores 23 and by means of positive engagement with the driver 25, the grinding plate is rotated 1 effect.

Der Innendurchmesser des dreigeteilten Zentrierringes 21 ist nur geringfügig größer als der Außendurchmesser des Zannträgers 29, so daß der Mitnehmer 25 bei Kopplung mit dem Schleifteller 1 zentriert, radial eng umgriffen, angeordnet ist und durch die Schraube 17 in dieser Position axial festgelegt wird. Der Zentrierring 21 dient zugleich als Verstärkungsrippe auf der Oberseite der Stützplatte 3.The inner diameter of the three-part centering ring 21 is only slightly larger than the outer diameter of the Zannträger 29, so that the driver 25 is centered when coupled to the grinding plate 1, radially tightly gripped, arranged and axially fixed by the screw 17 in this position. The centering ring 21 also serves as a reinforcing rib on the top of the support plate 3.

Die in Figur 2 gezeigte Explosivdarstellung des Ausführungsbeispiels gemäß Figur 1 verdeutlicht die Anordnung und Funktionsweise der Zähne 31 mit den Zahneingriffsbohrungen 23.
Außerdem wird deutlich, daß die Stahlscheibe 7 durchgehend von den Zahneingriffsbohrungen 23 und der zentralen Durchgangsbohrung 13 durchbrochen ist und daß sie als unverlierbare Unterlegscheibe sowie als Versteifungsteil für den Schleifteller 1 zugleich fungiert. Außerdem kann die Stahlscheibe 7 Übertragungskräfte der Zähne 31 aufnehmen und schonend auf den Schleifteller 1 übertragen.The exploded view of the exemplary embodiment according to FIG. 1 shown in FIG. 2 illustrates the arrangement and functioning of the teeth 31 with the tooth engagement bores 23.
It is also clear that the steel disc 7 is continuously penetrated by the tooth engagement bores 23 and the central through bore 13 and that it acts as a captive washer and as a stiffening part for the grinding plate 1 at the same time. In addition, the steel disc 7 can absorb transmission forces of the teeth 31 and transmit them gently to the grinding plate 1.

Die Figur 3 gezeigte Draufsicht auf den Schleifteller 1 zeigt, daß der Zentrierring 21 in drei Ringsegmente 23 geteilt ist. Die Segmentierung des Zentrierringes 21 erklärt sich durch die Anordnung der drei Zahneingriffsbohrungen 23 über den Innendurchmessers des Zentrierringes 21 hinaus, durch einen Eingriff in deren Kontur.The top view of the grinding plate 1 shown in FIG. 3 shows that the centering ring 21 is divided into three ring segments 23. The segmentation of the centering ring 21 can be explained by the arrangement of the three tooth engagement bores 23 beyond the inner diameter of the centering ring 21, by an engagement in the contour thereof.

Das in Figur 4 dargestellte Ausführungsbeispiel eines Schleiftellers 41 unterscheidet sich von dem der Figuren 1, 2 und 3 vor allem durch die Ausgestaltung des Koppelbereiches zwischen dem Schleifteller 41 und der Schleifmaschinenabtriebswelle bzw. durch die Ausgestaltung des Zentrierrings 61 und des Mitnehmers 65. Prinzipgleich zur Figur 1 setzt sich der Schleifteller 41 zusammen aus: Stützplatte 43, Kissen 45, Stahlscheibe 47, Klettverschluß 9, Staubabsaugöffnungen 51, zentrale Durchgangsbohrung 53, Bohrung 55, Schraube 57, zentrale Ausnehmnng 59, Zentrierring 61.
Prinzipgleich zur Figur 1 setzt sich der Mitnehmer 65 zusammen aus: Mitnehmerschaft 67, Zahnträger 69, Zahne 71, Gewindebohrungen 73.The exemplary embodiment of a grinding plate 41 shown in FIG. 4 differs from that of FIGS. 1, 2 and 3 primarily by the configuration of the coupling area between the grinding plate 41 and the grinding machine output shaft or by the configuration of the centering ring 61 and the driver 65 1 the sanding plate 41 is composed of: support plate 43, cushion 45, steel disc 47, Velcro fastener 9, dust extraction openings 51, central through-hole 53, hole 55, screw 57, central recess 59, centering ring 61.
In principle the same as FIG. 1, the driver 65 is composed of: driver shaft 67, tooth carrier 69, tooth 71, threaded bores 73.

Der Zentrierring 61 hat innen eine Konusfläche 62, die wie ein Zahnrad profiliert ist und in die die kegelzahnradartig ausgestaltete Kegelfläche an der Stirnseite 64 des Mitnehmers 65 einrastend, selbstzentrierend positioniert werden kann. Die Konusfläche 62 ist so bemessen, daß bei eingesetztem Mitnehmer 65 ein Hohlraum 66 verbleibt, in den, je nach Verschleißzustand der Konusfläche 62 bzw. je nach Vorspannkraft durch die Schraube 57, der Mitnehmer 65 mehr oder weniger tief eintauchen kann. Der Hohlraum 66 bildet zugleich einen Ausweichraum für sich eventuell ansammelnden Schleifstaub, an den sich nicht dargestellte Staub-Auswurföffnungen anschließen. Die Stahlscheibe 47 ist hier nur als Unterlegscheibe ausgestaltet und unverlierbar in der zentralen Ausnehmung 59 eingepreßt, umschäumt oder eingeklebt. Die Stahlscheibe 47 dient hier nicht der Drehmitnahme zwischen Mitnehmer 65 und Schleifteller 41.The centering ring 61 has a conical surface 62 on the inside, which is profiled like a gearwheel and into which the bevel gearwheel-shaped conical surface on the end face 64 of the driver 65 can be positioned, self-centering. The cone surface 62 is dimensioned such that when the driver 65 is inserted, a cavity 66 remains, into which, depending on the state of wear of the cone surface 62 or depending on the pretensioning force caused by the screw 57, the driver 65 can plunge more or less deeply. The cavity 66 also forms an escape space for grinding dust that may accumulate, to which dust ejection openings (not shown) are connected. The steel washer 47 is designed here only as a washer and is captively pressed, foamed or glued into the central recess 59. The steel disc 47 is not used here for the rotary driving between the driver 65 and the grinding plate 41.

In Figur 5 ist der Mitnehmer perspektivisch als Einzelheit dargestellt und verdeutlicht dessen kegelzahnradartige Ausgestaltung in der Art eines Negativabdruckes der Konusfläche 62 des Zentrierringes 61.5 the driver is shown in perspective as a detail and illustrates its bevel gear-like configuration in the manner of a negative impression of the conical surface 62 of the centering ring 61.

Die hier gewölbt dargestellten Zahnflanken bzw. Einprägungen 63 der Konusflächen 62 können auch als rechtwinklige Einkerbungen ausgestaltet sein, falls besonders hohe Drehmomente von der Abtriebswelle auf den Schleifteller 41 übertragen werden sollen.The tooth flanks or impressions 63 of the conical surfaces 62 shown here arched can also be designed as right-angled notches if particularly high torques are to be transmitted from the output shaft to the grinding plate 41.

Eine rippenartige Ausgestaltung der Stützplatte 43 analog zu Figur 1 ist nicht mitdargestellt.A rib-like configuration of the support plate 43 analogous to FIG. 1 is not shown.

Bei einem nichtdargestellten Ausführungsbeispiel trägt der Schleifteller nur zwei Zahneingriffsbohrungen und der Zentrierring des Schleiftellers ist in Nachbarschaft zu den Zahneingriffsbohrungen geteilt, besteht aus zwei Segmenten. Der zugehörige Mitnehmer trägt entsprechend der Anzahl der zwei Zahneingriffsbohrungen zwei axial überstehende Zähne, die sinnvolle Mindestanzahl für eine gesicherte Funktion und einfache Herstellung des Mitnehmers.In an exemplary embodiment not shown, the grinding plate has only two tooth engagement holes and the centering ring of the grinding plate is divided in the vicinity of the tooth engagement holes and consists of two segments. The associated driver carries two axially projecting teeth in accordance with the number of two tooth engagement bores, the reasonable minimum number for a reliable function and simple manufacture of the driver.

Bei einem nichtmitdargestellten Exzenterschleifer ist der Mitnehmer gegenüber der Schleifmaschinenwelle bzw. gegenüber einem mit dieser drehfest gekuppelten Exzenterzapfen über ein Wälzlager frei drehbar gekuppelt.In the case of an eccentric sander (not shown), the driver is freely rotatably coupled to the grinding machine shaft or to an eccentric pin that is rotationally fixedly coupled to it via a roller bearing.

Claims (13)

Anordnung zur Drehmitnahme eines Schleiftellers (1, 41) an einer Abtriebswelle einer Schleifmaschine, insbesondere Handschleifmaschine, dadurch gekennzeichnet, daß der Schleifteller (1, 41) sich selbsttätig an der Abtriebswelle, insbesondere an einem Mitnehmer (25, 65), zentriert.Arrangement for the rotary driving of a grinding plate (1, 41) on an output shaft of a grinding machine, in particular a manual grinding machine, characterized in that the grinding plate (1, 41) is automatically centered on the output shaft, in particular on a driver (25, 65). Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß, insbesondere aus Zapfen und Zentrierring bzw. aus Zahn und Zahneingriffsbohrung gebildete, Flächen einerseits zur Drehmitnahme, andererseits zum Zentrieren (21, 41, 29, 69) zwischen dem Schleifteller (1, 41) und der Abtriebswelle, insbesondere dem Mitnehmer (25, 65), angeordnet sind.Arrangement according to claim 1, characterized in that surfaces, in particular formed from a pin and centering ring or from a tooth and tooth engagement bore, on the one hand for rotary driving, on the other hand for centering (21, 41, 29, 69) between the grinding plate (1, 41) and the Output shaft, in particular the driver (25, 65), are arranged. Anordnung nach Anspruch 2, dadurch gekennzeichnet, daß am Schleifteller (1) Ringsegmente (22) als Zentriermittel (21) dienen, die ein freies Ende der Abtriebswelle, insbesondere des Mitnehmers (25), umgreifen.Arrangement according to claim 2, characterized in that on the grinding plate (1) ring segments (22) serve as centering means (21) which encompass a free end of the output shaft, in particular of the driver (25). Anordnung nach Anspruch 3, dadurch gekennzeichnet, daß zwischen der Abtriebswelle, insbesondere dem Mitnehmer (25, 65), und dem Schleifteller (1, 41) Formschluß zur Drehmitnahme besteht.Arrangement according to claim 3, characterized in that there is a positive connection between the output shaft, in particular the driver (25, 65), and the grinding plate (1, 41) for rotary driving. Anordnung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß am Mitnehmer (25, 65) Vorsprünge (31, 71) angeordnet sind, insbesondere zwei oder mehr zur Achse konzentrische, axial vorstehende Zähne (31), die in Einprägungen (23, 63), insbesondere zwei oder mehr konzentrische Zahneingriffsbohrungen (23), des Schleiftellers (1) ragen.Arrangement according to one of claims 1 to 4, characterized in that projections (31, 71) are arranged on the driver (25, 65), in particular two or more axially projecting teeth (31) which are concentric to the axis and which are formed in impressions (23, 63), in particular two or more concentric tooth engagement bores (23) of the grinding plate (1) protrude. Anordnung nach Anspruch 5, dadurch gekennzeichnet, daß der Ring (61) innen konisch, mit Vorsprüngen sowie Einprägungen ausgestaltet ist und der Negativform des kegeligen, freien Endes des Mitnehmers (65) entspricht, in die dieser einrasten kann.Arrangement according to claim 5, characterized in that the ring (61) is conical on the inside, with projections and embossments and corresponds to the negative shape of the conical, free end of the driver (65) into which it can snap into place. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zwischen den Schichten des Schleiftellers (1) ein, insbesondere aus Stahlblech bestehendes, scheibenartiges, vorzugsweise Zahneingriffsbohrungen (23) tragendes Verstärkungsteil (7) unlösbar, insbesondere vergossen bzw. umschäumt, angeordnet ist.Arrangement according to one of the preceding claims, characterized in that between the layers of the grinding plate (1) a reinforcing part (7), in particular made of sheet steel and preferably having tooth-engagement bores (23), is arranged in a non-detachable manner, in particular cast or foamed. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß im Schleifteller (1) Staubabsaugöffnungen (11) angeordnet sind.Arrangement according to one of the preceding claims, characterized in that dust extraction openings (11) are arranged in the grinding plate (1). Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine zentrale Ausnehmung (19) im Kissen (5, 45) angeordnet ist.Arrangement according to one of the preceding claims, characterized in that a central recess (19) is arranged in the cushion (5, 45). Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Stützplatte (3, 43) auf ihrer Unterseite ringförmige und gerade, radial verlaufende, einander kreuzende Rippen trägt und durch den Werkstoff des Kissens (5, 45) umschäumt ist.Arrangement according to one of the preceding claims, characterized in that the support plate (3, 43) has annular and straight, radially extending, crossing ribs on its underside and is foamed by the material of the cushion (5, 45). Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß mindestens ein Ausweichraum (66) mit Austrittsöffnungen für Schleifstaub zwischen der Abtriebswelle, insbesondere dem Mitnehmer, und dem Schleifteller vorgesehen sind.Arrangement according to one of the preceding claims, characterized in that at least one escape space (66) with outlet openings for grinding dust is provided between the output shaft, in particular the driver, and the grinding plate. Schleifteller zur Drehmitnahme an einer Abtriebswelle einer Schleifmaschine, insbesondere Handschleifmaschine, nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Schleifteller (1, 41) sich selbsttätig an der Abtriebswelle, insbesondere an einem Mitnehmer (25, 65), zentriert.Sanding disc for rotary driving on an output shaft of a grinding machine, in particular a manual grinding machine, according to one of the preceding claims, characterized in that the grinding disc (1, 41) is automatically centered on the output shaft, in particular on a driver (25, 65). Mitnehmer zur Drehmitnahme eines Schleiftellers an einer Abtriebswelle einer Schleifmaschine, insbesondere Handschleifmaschine, nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Mitnehmer ler (1, 41) sich selbsttätig am Schleifteller (1, 41) zentriert.Carrier for the rotary driving of a grinding plate on an output shaft of a grinding machine, in particular a hand grinding machine, according to one of the preceding claims, characterized in that the driver (1, 41) is automatically centered on the grinding plate (1, 41).
EP93101920A 1992-02-27 1993-02-08 Grinding machine with adapter for rotatably engaging a multi-layered back-up pad for sanding disc Expired - Lifetime EP0557773B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4205977A DE4205977A1 (en) 1992-02-27 1992-02-27 GRINDING PLATE FROM MULTIPLE MATERIAL LAYERS
DE4205977 1992-02-27

Publications (2)

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EP0557773A1 true EP0557773A1 (en) 1993-09-01
EP0557773B1 EP0557773B1 (en) 1998-05-13

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EP93101920A Expired - Lifetime EP0557773B1 (en) 1992-02-27 1993-02-08 Grinding machine with adapter for rotatably engaging a multi-layered back-up pad for sanding disc

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EP (1) EP0557773B1 (en)
DE (2) DE4205977A1 (en)

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DE29520566U1 (en) * 1995-12-29 1996-02-22 Jöst, Peter, 69518 Abtsteinach Abrasives that can be adapted directly or indirectly with a machine or a manually operated abrasive holder as well as a suitable adapter
GB2322579A (en) * 1997-02-28 1998-09-02 Bosch Gmbh Robert A grinding plate for a hand-held tool
EP1186379A3 (en) * 2000-09-07 2003-03-26 Tholes srl Device for surface grinding and sanding
GB2390316A (en) * 2002-07-05 2004-01-07 Bosch Gmbh Robert Backing pad for an abrasive disc
WO2006100153A1 (en) * 2005-03-23 2006-09-28 Robert Bosch Gmbh Hand-held machine tool having a grinding disk
EP1775071A1 (en) 2003-08-11 2007-04-18 UFI Schleiftechnik GmbH & Co. KG Abrasive disc for grinding machine
US7223165B2 (en) 2003-12-06 2007-05-29 Robert Bosch Gmbh Abrasive pad for a manual grinding machine
WO2008098637A1 (en) * 2007-02-16 2008-08-21 Robert Bosch Gmbh Grinding disk for an eccentric grinding machine
EP1977858A1 (en) 2007-04-02 2008-10-08 UFI Schleiftechnik GmbH &amp; Co. KG Sanding system
WO2012019286A1 (en) * 2010-08-10 2012-02-16 Miksa Marton Surface treating apparatus and method

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DE10357652A1 (en) * 2003-12-10 2005-07-07 Robert Bosch Gmbh Electric hand tool, in particular eccentric grinder
DE102005062459B4 (en) 2005-12-27 2019-01-17 Robert Bosch Gmbh hand grinder
DE202006013890U1 (en) 2006-09-01 2006-11-16 C. & E. Fein Gmbh Tool for cutting processes comprises a working plate having a fixing region with a fixing opening for fixing to a driveshaft of a drive, especially an oscillating drive
DE102007039367B4 (en) 2006-09-01 2019-12-19 C. & E. Fein Gmbh tool attachment
DE202009000880U1 (en) * 2009-01-23 2009-07-09 Kolthoff & Co., Flüelen sanding pad
US11458595B2 (en) 2018-11-19 2022-10-04 Husqvarna Ab Tool attachment means for power trowels

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Cited By (20)

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Publication number Priority date Publication date Assignee Title
DE29520566U1 (en) * 1995-12-29 1996-02-22 Jöst, Peter, 69518 Abtsteinach Abrasives that can be adapted directly or indirectly with a machine or a manually operated abrasive holder as well as a suitable adapter
GB2322579A (en) * 1997-02-28 1998-09-02 Bosch Gmbh Robert A grinding plate for a hand-held tool
GB2322579B (en) * 1997-02-28 2000-01-12 Bosch Gmbh Robert Grinding plate for a hand-held electric tool with dust extraction
CN1094814C (en) * 1997-02-28 2002-11-27 罗伯特-博希股份公司 Polishing plate for portable electric tool with dust suction device
EP1186379A3 (en) * 2000-09-07 2003-03-26 Tholes srl Device for surface grinding and sanding
GB2390316A (en) * 2002-07-05 2004-01-07 Bosch Gmbh Robert Backing pad for an abrasive disc
JP2004090212A (en) * 2002-07-05 2004-03-25 Robert Bosch Gmbh Fitting tool with support plate
GB2390316B (en) * 2002-07-05 2005-05-18 Bosch Gmbh Robert Insert tool with a support plate
US7458884B2 (en) 2003-08-11 2008-12-02 Ufi Schleiftechnik Gmbh & Co. Kg Grinding disc for grinding machines
EP1775071A1 (en) 2003-08-11 2007-04-18 UFI Schleiftechnik GmbH & Co. KG Abrasive disc for grinding machine
US7223165B2 (en) 2003-12-06 2007-05-29 Robert Bosch Gmbh Abrasive pad for a manual grinding machine
WO2006100153A1 (en) * 2005-03-23 2006-09-28 Robert Bosch Gmbh Hand-held machine tool having a grinding disk
CN101146650B (en) * 2005-03-23 2012-11-14 罗伯特·博世有限公司 Hand-held machine tool having a grinding disk
WO2008098637A1 (en) * 2007-02-16 2008-08-21 Robert Bosch Gmbh Grinding disk for an eccentric grinding machine
US8113921B2 (en) 2007-02-16 2012-02-14 Robert Bosch Gmbh Tool set for an eccentric grinder
EP1977858A1 (en) 2007-04-02 2008-10-08 UFI Schleiftechnik GmbH &amp; Co. KG Sanding system
WO2012019286A1 (en) * 2010-08-10 2012-02-16 Miksa Marton Surface treating apparatus and method
EP2603356A1 (en) * 2010-08-10 2013-06-19 Miksa Marton Surface treating apparatus and method
EP2603356A4 (en) * 2010-08-10 2014-01-08 Miksa Marton Surface treating apparatus and method
US8636562B2 (en) 2010-08-10 2014-01-28 Miksa Marton Surface treating apparatus and method

Also Published As

Publication number Publication date
DE59308519D1 (en) 1998-06-18
DE4205977A1 (en) 1993-09-02
EP0557773B1 (en) 1998-05-13

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