EP0557773B1 - Grinding machine with adapter for rotatably engaging a multi-layered back-up pad for sanding disc - Google Patents
Grinding machine with adapter for rotatably engaging a multi-layered back-up pad for sanding disc Download PDFInfo
- Publication number
- EP0557773B1 EP0557773B1 EP93101920A EP93101920A EP0557773B1 EP 0557773 B1 EP0557773 B1 EP 0557773B1 EP 93101920 A EP93101920 A EP 93101920A EP 93101920 A EP93101920 A EP 93101920A EP 0557773 B1 EP0557773 B1 EP 0557773B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sanding disc
- carry
- along
- disc
- grinding machine
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000000428 dust Substances 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims 4
- 230000000295 complement effect Effects 0.000 claims 2
- 239000000463 material Substances 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 claims 1
- 239000002184 metal Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
Images
Classifications
-
- 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 is based on a combination of a grinder and one Sanding disc according to the generic term of Claim 1 or 6.
- a grinding plate is known the one with a central, cone-like, non-detachable Head piece is provided, which has a thread with the free end of the Output shaft of a grinding machine is connected.
- the headpiece has the shape of a disc about two thirds of the size Surface of the grinding plate, which is in the middle of the grinding plate central pin runs with a central bore. In the hole protrudes the free end of the output shaft.
- the sanding plate becomes relatively heavy. Due to the large mass, small irregularities already have an effect in the mass distribution - i.e. Unbalance - extraordinary strongly on the vibration behavior of the grinding plate. That's why this sanding plate must be carefully balanced, which is complicated by the fact that the sanding disc has a long Threaded pin must be screwed before using the intended one Minimum speed can be operated.
- DE-U 8 907 224 is a device for rotationally fixed fastening of a grinding plate at the end of an output shaft
- Known grinding machine which is designed as a sheet metal disc and the one on one side with two radially outer axially bent rags in recesses of the grinding plate for rotary driving engages and on the other side with two radially inner, axially bent rag the end of the output shaft encompasses non-rotatable.
- the combination according to the invention with the features of claim 1 and 6 has the advantage that it is lighter and centered automatically, precisely with respect to the output shaft, so that unbalance cannot occur. This affects the Lifetime of the grinding plate and also the grinding machine is operated with this grinding disc.
- FIG. 1 Show it Figure 1 with a first embodiment of a grinding plate Driver shaft, Figure 2 is a perspective, exploded View of the first embodiment, Figure 3 is a plan view on the first embodiment, Figure 4 shows a second embodiment of a grinding plate with driver and the figure 5 one Perspective view of a driver according to Figure 4.
- the center-cut grinding plate 1 shown in FIG. 1 exists from a support plate 3 arranged on its upper side, a arranged on its underside pillow 5, between which one perforated steel disk 7 serving as a reinforcing part is.
- the cushion 5 has a Velcro fastener on its underside 9, the non-illustrated sanding sheets with velor back or to accommodate other intermediate cushions, not shown with velor back and Velcro is suitable.
- the grinding plate 1 has a plurality of axial openings, which as Dust extraction openings 11 serve and not with suction channels shown are assigned to remove the grinding dust.
- a central through bore 13 is aligned with a bore 15 in the steel disc 7 for the passage of a screw 17 with which the Sanding disc 1 for take-away by a grinding machine output shaft, not shown can be coupled with this.
- the pillow 5 has a central recess 19 so that the underside of the Steel disc 7 is exposed and the head of the screw 17 to the system can reach.
- the support plate 3 carries a concentrically on its top the through hole 13 arranged collar, which as the centering ring 21st serves.
- the support plate 3 and the steel plate 7 carries concentrically to the through hole 13 on a common pitch circle three continuous recesses, which serve as tooth engagement holes 23 to serve.
- the support plate 3 On its underside, the support plate 3 carries several annular, merging ribs 35 of different diameters as well several radial ribs that cross the circular ribs and connect them together.
- a driver 25 to be axially coupled to the not shown Grinding machine output shaft consists of a drive shaft 27, the one on its side facing the grinding plate 1 plate-like tooth support 29 widened, the three on its circumference axially projecting teeth 31 carries.
- the driver 25 is with a provided central threaded bore 33 into which the screw 17 is screwed can be to the grinding plate 1 axially on the driver 25 to hold on to.
- the grinding plate 1 is coupled to the driver 25 in the following way:
- the driver 25 is in the centering ring 21 on the Top of the support plate 3 set that in the tooth engagement holes 23 the teeth 31 enter and by positive engagement with the driver 25 cause a rotation of the grinding plate 1.
- the inner diameter of the three-part centering ring 21 is only slight larger than the outer diameter of the Zann carrier 29, so that the driver 25 centered radially when coupled to the grinding plate 1 tightly gripped, arranged and by the screw 17 in this Position is determined axially.
- 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 disk 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 the centering ring 21 is explained by the arrangement of the three meshing holes 23 over the inner diameter of the centering ring 21, by an intervention in their contour.
- 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 grinding plate 41 is composed of: support plate 43, cushion 45, steel disk 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 like a gear is profiled and in which the bevel gear-shaped
- the conical surface engages on the end face 64 of the driver 65, can be positioned self-centering.
- the cone surface is 62 dimensioned such that a cavity 66 remains when the driver 65 is inserted, depending on the state of wear of the conical surface 62 or after preload by the screw 57, the driver 65 more or immersed less deeply.
- the cavity 66 also forms one Alternative space for any sanding dust that may accumulate connect dust ejection openings, not shown.
- the Steel washer 47 is only designed as a washer and pressed captively in the central recess 59, foamed or glued in.
- the steel disc 47 is not used for rotary driving here between driver 65 and sanding plate 41.
- the driver is shown in perspective as a detail and illustrates its bevel gear-like design in the type of a negative impression of the conical surface 62 of the centering ring 61.
- the tooth flanks or impressions 63 of the arched here Cone surfaces 62 can also be designed as rectangular notches be, if particularly high torques from the output shaft to be transferred to the grinding plate 41.
- a rib-like configuration of the support plate 43 analogous to FIG. 1 is not shown.
- the driver is against the grinding machine shaft or against one with it non-rotatably coupled eccentric pin freely rotatable via a roller bearing coupled.
Landscapes
- 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)
Description
Die Erfindung geht aus von einer Kombination aus einer Schleifmaschine und einem Schleifteller nach dem Oberbegriff des Anspruchs 1 bzw. 6.The invention is based on a combination of a grinder and one Sanding disc according to the generic term of Claim 1 or 6.
Durch die DE-OS 27 59 694 ist ein 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 grinding plate is known the one with a central, cone-like, non-detachable Head piece is provided, which has a thread with the free end of the Output shaft of a grinding machine is connected. The headpiece has the shape of a disc about two thirds of the size Surface of the grinding plate, which is in the middle of the grinding plate central pin runs with a central bore. In the hole protrudes the free end of the output shaft. Through this configuration of the head piece, the sanding plate becomes relatively heavy. Due to the large mass, small irregularities already have an effect in the mass distribution - i.e. Unbalance - extraordinary strongly on the vibration behavior of the grinding plate. That's why this sanding plate must be carefully balanced, which is complicated by the fact that the sanding disc has a long Threaded pin must be screwed before using the intended one Minimum speed can be operated.
Durch die DE-U 8 907 224 ist eine Einrichtung zur drehfesten Befestigung eines Schleiftellers am Ende einer Abtriebwelle einer Schleifmaschine bekannt, die als Blechscheibe ausgestaltet ist und die auf einer Seite mit zwei radial außenliegenden axial ausgebogenen Lappen in Ausnehmungen des Schleiftellers zur Drehmitnahme eingreift und auf der anderen Seite mit zwei radial inneren, axial ausgebogenen Lappen das Ende der Abtriebswelle formschlüssig drehfest umgreift. Diese Befestigungseinrichtung ist zwar günstig herstellbar und zur Übertragung eines hohen Drehmoments von der Abtriebswelle auf den Schleifteller geeignet, die damit erreichbare Zentrierlage zwischen dem Schleifteller und der Abtriebswelle ist jedoch unzureichend, weil einerseits die Lage der Blechscheibe gegenüber der Abtriebswelle nur mit verhältnismäßig großem Spiel festlegbar ist und weil andererseits weder am Schleifteller noch auf der dem Schleifteller zugewandten Seite der Blechscheibe Mittel zur Sicherung von dessen Zentrierlage vorhanden sind. Dadurch treten an der Schleifmaschine unwuchtbedingte Schwingungen auf, die die Handhabung erschweren. DE-U 8 907 224 is a device for rotationally fixed fastening of a grinding plate at the end of an output shaft Known grinding machine, which is designed as a sheet metal disc and the one on one side with two radially outer axially bent rags in recesses of the grinding plate for rotary driving engages and on the other side with two radially inner, axially bent rag the end of the output shaft encompasses non-rotatable. This fastener is cheap to manufacture and for the transfer of a high Torque from the output shaft to the grinding plate, the centering position that can be achieved between the sanding plate and the output shaft is insufficient because on the one hand the position of the sheet metal plate in relation to the output shaft only can be determined with a relatively large game and because on the other hand neither on the grinding plate nor on the grinding plate facing side of the sheet metal means for securing it Centering position are available. This will kick the grinder unbalanced vibrations on the handling complicate.
Die erfindungsgemäße Kombination mit den Merkmalen des Anspruchs 1 bzw. 6 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 combination according to the invention with the features of claim 1 and 6 has the advantage that it is lighter and centered automatically, precisely with respect to the output shaft, so that unbalance cannot occur. This affects the Lifetime of the grinding plate and also the grinding machine is operated with this grinding disc.
Weitere, vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.Further advantageous refinements of the invention result from the dependent claims.
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.Embodiments of the invention are in the description below explained in more detail with reference to the accompanying drawing. Show it Figure 1 with a first embodiment of a grinding plate Driver shaft, Figure 2 is a perspective, exploded View of the first embodiment, Figure 3 is a plan view on the first embodiment, Figure 4 shows a second embodiment of a grinding plate with driver and the figure 5 one Perspective view of a driver according to Figure 4.
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 center-cut grinding plate 1 shown in FIG. 1 exists
from a
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 as
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
Durch radiale, nicht dargestellte Kanäle im Kissen 5 kann die zentrale
Ausnehmung 19 mit den Staubabsaugöffnungen 11 verbunden sein
und dadurch dem Staubabtransport dienen.By radial channels, not shown, in the
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
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
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
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
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-
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
It is also clear that the
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
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
In principle the same as in FIG. 1, the
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
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.In Figure 5, the driver is shown in perspective as a detail
and illustrates its bevel gear-like design in
the type of a negative impression of the
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
Eine rippenartige Ausgestaltung der Stützplatte 43 analog zu Figur 1
ist nicht mitdargestellt. A rib-like configuration of the
Bei einem nichtmitdargestellten Exzenterschleifer ist der Mitnehmer gegenüber der Schleifmaschinenwelle bzw. gegenüber einem mit dieser drehfest gekuppelten Exzenterzapfen über ein Wälzlager frei drehbar gekuppelt.If the eccentric sander is not shown, the driver is against the grinding machine shaft or against one with it non-rotatably coupled eccentric pin freely rotatable via a roller bearing coupled.
Claims (9)
- Combination of a grinding machine, in particular hand-held grinding machine, which has a carry-along element (25) for carrying along a sanding disc (1) in rotation and of the sanding disc (1) which can be mounted on the output shaft of said grinding machine, it being the case that, between the sanding disc (1) and the carry-along element (25), form-fit elements serving as a coupling and designed as teeth (31) are arranged on the carry-along elements and mating form-fit elements designed as tooth-engagement bores (3) are arranged on the sanding disc, characterized in that the sanding disc (1) is centred automatically on the output shaft via the carry-along element (25), a further form-fit element, which is designed as a journal (29) and a further mating form-fit element, which is designed as a complementary centring ring (21) serving as centring means, and three form-fit elements (31), which are designed as teeth, and three complementary mating form-fit elements (23) serving as means for carrying along the sanding disc in rotation.
- Combination according to Claim 1, characterized in that ring segments (22), which engage around a free end (29) of the carry-along element (25), serve as centring ring (21) on the sanding disc (1).
- Combination according to one of Claims 1 and 2, characterized in that a disc-like reinforcement part (7) which consists, in particular, of sheet steel and preferably bears the tooth-engagement bores (23) is borne in an unreleasable manner, in particular in an encapsulated manner, in the interior of the sanding disc (1).
- Combination according to one of Claims 1 - 3 characterized in that a central recess (19) is arranged in the pad (5) of the sanding disc (1).
- Combination according to one of Claims 1 to 4, characterized in that three or more axially projecting teeth (31), which are concentric with respect to the axis, are arranged on the carry-along element (25) and project into impressions (23) of the sanding disc (1).
- Combination of a grinding machine, in particular hand-held grinding machine, which has a carry-along element (65) for carrying along a sanding disc (41) in rotation and of the sanding disc (41) which can be mounted on the output shaft of said grinding machine, it being the case that, between the grinding disc (41) and the carry-along element (65), tooth-like form-fit elements serving as a coupling are arranged on the sanding disc and mating form-fit elements (63, 71) in the manner of tooth-engagement openings are arranged on the carry-along element, characterized in that an internally conical ring (61), which engages around a free end (69) of the carry-along element (65), the latter being provided with protrusions and impressions (63, 71), serves as centring means on the sanding disc (41), corresponds to the negative form of the conical, free end (69) of the carry-along element (65) and can have the carry-along element (65) latching therein, with the result that the sanding disc is centred automatically on the output shaft via the carry-along element (65).
- Combination according to one of Claims 1 - 6, characterized in that dust-extraction openings (11, 51) are arranged in the sanding disc (1, 41).
- Combination according to one of the preceding claims, characterized in that there is arranged on the sanding disc (1, 41) a supporting plate (3, 43) which bears annular and rectilinear, radially running, intersecting ribs on its underside and is encapsulated by the material of the pad (5, 45).
- Combination according to one of Claims 6 to 8, characterized in that at least one collecting space (66) with outlet openings for grinding dust is provided between the output shaft, in particular the carry-along element (65), and the sanding disc (41).
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)
| Publication Number | Publication Date |
|---|---|
| EP0557773A1 EP0557773A1 (en) | 1993-09-01 |
| EP0557773B1 true EP0557773B1 (en) | 1998-05-13 |
Family
ID=6452683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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 |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0557773B1 (en) |
| DE (2) | DE4205977A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100553882C (en) * | 2003-12-10 | 2009-10-28 | 罗伯特·博施有限公司 | Electronic hand held machine tool, particularly eccentric grinder |
| RU2461454C2 (en) * | 2007-02-16 | 2012-09-20 | Роберт Бош Гмбх | Set of tools for eccentric grinding machine |
| DE102005062459B4 (en) | 2005-12-27 | 2019-01-17 | Robert Bosch Gmbh | hand grinder |
| US11458595B2 (en) | 2018-11-19 | 2022-10-04 | Husqvarna Ab | Tool attachment means for power trowels |
Families Citing this family (12)
| 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 |
| IT1298432B1 (en) * | 1997-02-28 | 2000-01-10 | Bosch Gmbh Robert | SANDING PLATE FOR A PORTABLE POWER TOOL WITH DUST EXTRACTION |
| ITBO20000520A1 (en) * | 2000-09-07 | 2002-03-07 | Bruno Oliosi | DEVICE FOR GRINDING AND / OR ABRASION OF SURFACES THROUGH ORBITAL ROTARY MACHINES |
| DE10230308B4 (en) * | 2002-07-05 | 2008-11-06 | Robert Bosch Gmbh | Insert tool with a backing pad |
| DE20312499U1 (en) | 2003-08-11 | 2004-12-16 | Ufi Schleiftechnik Gmbh & Co. Kg | Sanding disc for grinding machine |
| DE10357144A1 (en) | 2003-12-06 | 2005-06-30 | Robert Bosch Gmbh | Sanding pad for a hand grinder |
| DE102005014045A1 (en) * | 2005-03-23 | 2006-09-28 | Robert Bosch Gmbh | Hand tool with a sanding plate |
| DE102007039367B4 (en) | 2006-09-01 | 2019-12-19 | C. & E. Fein Gmbh | tool attachment |
| 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 |
| DE202007004949U1 (en) | 2007-04-02 | 2007-06-06 | Ufi Schleiftechnik Gmbh & Co. Kg | grinding system |
| DE202009000880U1 (en) * | 2009-01-23 | 2009-07-09 | Kolthoff & Co., Flüelen | sanding pad |
| WO2012020275A1 (en) * | 2010-08-10 | 2012-02-16 | Miksa Marton | Sanding apparatus |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2581567A (en) * | 1948-12-29 | 1952-01-08 | Darrell R Wiley | Buffer backing pad |
| US4844967A (en) * | 1988-10-14 | 1989-07-04 | Minnesota Mining And Manufacturing Company | Back up pad with drive adapter and offset passageways |
| DE8907224U1 (en) * | 1989-06-13 | 1989-10-05 | Ihmels, Hartmut, 2905 Edewecht | Fastening device for the rotationally fixed attachment of a grinding disc to a grinding machine |
-
1992
- 1992-02-27 DE DE4205977A patent/DE4205977A1/en not_active Withdrawn
-
1993
- 1993-02-08 EP EP93101920A patent/EP0557773B1/en not_active Expired - Lifetime
- 1993-02-08 DE DE59308519T patent/DE59308519D1/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100553882C (en) * | 2003-12-10 | 2009-10-28 | 罗伯特·博施有限公司 | Electronic hand held machine tool, particularly eccentric grinder |
| DE102005062459B4 (en) | 2005-12-27 | 2019-01-17 | Robert Bosch Gmbh | hand grinder |
| RU2461454C2 (en) * | 2007-02-16 | 2012-09-20 | Роберт Бош Гмбх | Set of tools for eccentric grinding machine |
| US11458595B2 (en) | 2018-11-19 | 2022-10-04 | Husqvarna Ab | Tool attachment means for power trowels |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0557773A1 (en) | 1993-09-01 |
| DE59308519D1 (en) | 1998-06-18 |
| DE4205977A1 (en) | 1993-09-02 |
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