EP1559509B1 - Device for mounting a grinding tool to a machine tool - Google Patents

Device for mounting a grinding tool to a machine tool Download PDF

Info

Publication number
EP1559509B1
EP1559509B1 EP20040027659 EP04027659A EP1559509B1 EP 1559509 B1 EP1559509 B1 EP 1559509B1 EP 20040027659 EP20040027659 EP 20040027659 EP 04027659 A EP04027659 A EP 04027659A EP 1559509 B1 EP1559509 B1 EP 1559509B1
Authority
EP
European Patent Office
Prior art keywords
tool
machine
threaded
threaded section
base element
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.)
Active
Application number
EP20040027659
Other languages
German (de)
French (fr)
Other versions
EP1559509A1 (en
Inventor
Christian Dipl.-Ing. Kneip (FH)
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.)
Festool GmbH
Original Assignee
Festool GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Festool GmbH filed Critical Festool GmbH
Publication of EP1559509A1 publication Critical patent/EP1559509A1/en
Application granted granted Critical
Publication of EP1559509B1 publication Critical patent/EP1559509B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • B24D5/16—Bushings; Mountings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/022—Spindle-locking devices, e.g. for mounting or removing the tool
    • 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
    • B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/20—Mountings for the wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/16—Bushings; Mountings

Definitions

  • the invention relates to a device for releasably connecting a plate-shaped or disk-shaped grinding tool with a machine tool driving the tool during operation to a rotating movement, with a tool-side fastening device and a machine-side fastening device, each having a threaded portion and are bolted together through their threaded portions, wherein one of the thread parts has an external thread and the other thread part has an internal thread, and the two fastening devices in the state screwed together are supported against one another via support surfaces.
  • the present invention seeks to provide a device of the type mentioned, with an excessive tightening of the respective grinding tool is avoided.
  • This object is achieved in that one of the thread parts against a spring force of a spring device in the direction of the support surface of the threaded portion having fastening device is mounted axially movable away and that the tool-side fastening device to a predetermined by rotary limit stops rotary end position with the Machine-side fastening device can be screwed.
  • a further advantage is that a torque possibly exerted on the grinding tool during operation in the release direction does not lead to loosening of the grinding tool, as long as the spring force is effective.
  • a grinding tool 1 in the form of a grinding plate for the abrasive machining of workpieces is apparent, on the underside 2 a not in the drawing shown abrasive coating is interchangeable attached. Instead of a sanding plate, it could also be a grinding wheel.
  • the grinding tool 1 is releasably rotatably connected to a driven part 3 of a motor machine tool, so that it performs a rotating movement during operation, when the machine tool is turned on.
  • the further development of the driven part 3 in detail is of no further interest in connection with the present invention.
  • the bonding of the grinding tool 1 to the driven part 3 takes place by means of a tool-side fastening device 4 and a machine-side fastening device 5, each having a threaded portion 6 and 7 and are screwed together via their threaded sections 6, 7.
  • One of the threaded sections expediently the tool-side threaded portion 6, has an internal thread 8.
  • the other threaded portion expediently the machine-side threaded portion 7, forms an external thread 9 cooperating with the internal thread 8.
  • the arrangement could also be reversed so that the tool-side fastening device is provided with an external thread and the machine-side fastening device with an internal thread.
  • the tool-side fastening device 4 with the internal thread 8 bearing threaded portion 6 is an integral part of the grinding tool 1, which formed in the embodiment of a tool-side fastening device 4 having tool upper part 10 made of hard plastic is at the bottom of a softer foam body 11 is attached to the bottom of the abrasive coating is attached.
  • the machine-side fastening device 5 consists, as will be described, of several individual parts and is firmly connected to the driven part 3, so that it remains on the machine tool. It is understood that it can also be taken away for repair purposes, for example.
  • a support surface 12 of the tool-side fastening device 4 comes into contact with a support surface 13 of the machine-side fastening device 5, so that the grinding tool 1 extends over the support surfaces 12, 13 supported on the machine side.
  • Both support surfaces 12, 13 have an annular shape and are arranged coaxially to the axis of rotation 14 of the driven part 3 and thus also of the grinding tool 1.
  • the tool-side support surface 12 is formed by the end face of the tool-side threaded portion 6 and the machine-side support surface 13 from the underside of a base member 15 of the machine-side fastening device 5.
  • the base element 15 protrudes in the radial direction beyond the threaded portion 7 of the machine-side fastening device 5. At this projecting area, the machine-side support surface 13 is arranged.
  • One of the two fastening devices expediently the machine-side fastening device 5, contains a spring device 16 expediently in the form of a plate spring 17.
  • the arrangement is such that the machine-side threaded portion 7 is mounted against the spring force of the spring device 16 in the direction of the machine-side support surface 13 away axially movable. This ensures that when screwing the grinding tool 1, when its support surface 12 has come to rest against the machine-side support surface 13, the grinding tool 1 can be further rotated in the sense of unscrewing, the machine-side threaded portion 7 against the spring force further into the tool side Internal thread 8 is pulled in, so to speak.
  • the tightening torque with which the grinding tool 1 is tightened on the machine-side threaded portion 7 and the machine-side support surface 13 is thus determined by the force of the spring device 16.
  • the tool-side fastening device 4 and the machine-side fastening device 5 each have at least one rotary end stop 18 and 19, which determine the rotary end position, to which the grinding tool 1 can be rotated. In this rotary end position, the at least one rotary end stop 18 of the grinding tool 1 comes to rest in the circumferential direction against the at least one rotary end stop 19 of the machine-side fastening device 5.
  • the tightening is not practically abrupt as in the usual case of a rigid arrangement of the machine-side threaded portion relative to the associated support surface but over a longer rotational path away against the spring force until the final rotational position is reached.
  • the two thread sections 6, 7 are formed as short as possible in the axial direction for reasons of space.
  • the two threaded sections 6, 7 each have a multi-start thread with at least two angularly offset to each other arranged threads.
  • both the tool-side internal thread 8 and the machine-side external thread 9 have three such internal threads 20 and external threads 21.
  • the external threads 21 are relatively short in the circumferential direction and arranged one behind the other without overlapping. In this case, a distance is provided between the individual external threads 21, so that only one of the three external threads 21 is visible in FIG. 2 in the case of the machine-side thread part 7.
  • the angle of rotation, over which the two threaded sections 6, 7 are in threaded engagement with one another, should be less than 120 ° because of the three rotary end stop pairs 18, 19. If only such a rotary end stop pair were present, the maximum angle of rotation would have to be less than 360 °.
  • the machine-side Gewindepartie 7 is formed by a threaded portion 22 which is adjacent to the aforementioned base member 15 in the axial direction.
  • the base member 15 is located at the attached with abrasive tool 1 this opposite side of the threaded portion 22.
  • the base member 15 and the threaded portion 22 are separate parts.
  • the base element 15 protrudes in the radial direction, expediently circumferentially, over the threaded part 22 and has the supporting surface 13 on the projecting area.
  • the described spring force generating spring device 16 engages from the base member 15 opposite side of the threaded portion 22 at.
  • the threaded portion 22 has a can-like shape with a base element 15 facing the bottom 23, from which projects the threaded portion 7.
  • the spring means 16, i. the plate spring 17 is inserted into the space enclosed by the threaded portion 7 of the threaded portion 22 and cooperates with the threaded portion bottom 23.
  • the base member 15 and the threaded portion 22 are non-rotatable in the assembled state and in the axial direction relative to each other movably connected to each other.
  • the base member 15 and the threaded portion 22 rotatably inserted into each other.
  • pocket-like recesses 24 are provided which are open to the base member 15.
  • These pocket-like recesses 24 are each assigned a plug projection 25 on the base element 15. The inserted into the pocket-like recesses 24 plug-in projections 25th make a non-rotatable, but axially movable connection.
  • the spring device 16, the threaded part 22 and the base part 15 are penetrated in this order by a locking screw 26, with which the machine-side fastening device 5 is fixed to the driven part 3.
  • the locking screw 26 is screwed with its protruding from the base portion 15 projecting portion in the driven part 3.
  • the maximum tightening torque of the grinding tool 1 is independent of how tight the locking screw 26 is tightened, a spacer bushing 27 is provided, the aligned axial recesses 28, 29 of the threaded portion 22 and the spring means 16 passes through and is supported on the base member 15.
  • the spacer bushing 27 also secures the spring device 16 in the axial direction. The latter is done by means of a radially projecting annular collar 30 of the spacer bushing 27, which engages around the spring means 16 about the axial recess 29 around.
  • the locking screw 26 extends through the AxialausEnglish Institute 28, 29 of the threaded portion 22 and the spring means 16, so to speak, lining bushing 27 and an axial bore 31 of the base member 15.
  • the locking screw 16 has at its the spacer bush 27 facing the end of a radially projecting screw head 32, the - Acts directly or via an intermediate element - against the spacer bushing 27, so that when tightened in the stripping section 3 locking screw 26, the spacer bushing 27 is clamped between the screw head 32 and the base member 15. In this way, the spring means 16 and the threaded portion 22 remain unaffected by how much the locking screw 26 is tightened.
  • the screw head 32 has a hexagon socket for a turning tool.
  • the spacer bushing 27 has at its radially outwardly projecting annular collar 30 opposite end on a radially inwardly directed annular shoulder 33 on which engages the dipping into the interior of the spacer bushing screw head 32 32.
  • the annular shoulder 33 encloses a passage opening 34 for the passage of the locking screw 26th
  • the base element 15 has a plate-like shape at least in its region projecting in the radial direction beyond the machine-side threaded portion 7.
  • the machine-side rotary end stops 19 are arranged on the base element 15. It is expediently provided that the rotary end stops 19 protrude radially outward on the circumference of the base element 15.
  • the rotary end stops 18 of the tool-side fastening device 4 can each be formed by the circumferentially facing end face 35 of a strip-like projection 36, which is arranged radially outside the tool-side support surface 12 and extends in the circumferential direction.
  • the mounted on the grinding tool 1 the base part 15 of the machine-side fastening means 5 facing top 37 of the strip-like projections 36 of the slope of the internal thread 8 correspondingly inclined, so that the strip-shaped projections 36 do not hinder the screwing of the grinding tool 1.

Description

Die Erfindung betrifft eine Vorrichtung zum lösbaren Verbinden eines teller- oder scheibenförmigen Schleifwerkzeugs mit einer beim Betrieb das Werkzeug zu einer rotierenden Bewegung antreibenden Werkzeugmaschine, mit einer werkzeugseitigen Befestigungseinrichtung und einer maschinenseitigen Befestigungseinrichtung, die jeweils eine Gewindepartie aufweisen und über ihre Gewindepartien miteinander verschraubt werden, wobei eine der Gewindepartien ein Außengewinde und die andere Gewindepartie ein Innengewinde aufweist und die beiden Befestigungseinrichtungen im miteinander verschraubten Zustand über Abstützflächen gegeneinander abgestützt sind.The invention relates to a device for releasably connecting a plate-shaped or disk-shaped grinding tool with a machine tool driving the tool during operation to a rotating movement, with a tool-side fastening device and a machine-side fastening device, each having a threaded portion and are bolted together through their threaded portions, wherein one of the thread parts has an external thread and the other thread part has an internal thread, and the two fastening devices in the state screwed together are supported against one another via support surfaces.

Übliche Schleifteller (siehe z.B. EP 0 542 693 A) weisen eine Gewindepartie mit einem Innengewinde auf, mit dem sie auf ein endseitig an der Abtriebswelle der Werkzeugmaschine angeordnetes Außengewinde aufgeschraubt werden. Dieses Aufschrauben wird durch eine abtriebswellenseitige Abstützfläche begrenzt, gegen die eine am Schleifteller angeordnete Abstützfläche zur Anlage gelangt. Sodann wird der Schleifteller noch gegen die abtriebswellenseitige Abstützfläche festgezogen. Dieses Festziehen erfolgt vom Benutzer häufig so fest, dass ein späteres Abschrauben des Schleiftellers Schwierigkeiten bereitet. Dabei kommt hinzu, dass sich Schleifteller beim Betrieb aufgrund der zwischen ihnen und dem zu schleifenden Werkstück auftretenden Kräfte regelmäßig von selbst noch weiter festziehen, so dass das Lösen des Schleiftellers noch weiter erschwert wird.Conventional sanding plates (see, for example, EP 0 542 693 A) have a threaded portion with an internal thread with which they are screwed onto an external thread arranged on the output shaft of the machine tool. This screwing is limited by a output shaft-side support surface against which a arranged on the sanding pad support surface comes to rest. Then the sanding pad is tightened against the output shaft side support surface. This tightening is done by the user often so tight that a later unscrewing of the sanding pad is difficult. In addition, that sanding plates regularly tighten by itself during operation due to the forces occurring between them and the workpiece to be ground, so that the release of the sanding plate is made even more difficult.

Für Schleifscheiben gilt Entsprechendes.For grinding wheels the same applies.

Ausgehend hiervon liegt der vorliegenden Erfindung die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art zu schaffen, mit der ein zu starkes Festziehen des jeweiligen Schleifwerkzeugs vermieden wird.Proceeding from this, the present invention seeks to provide a device of the type mentioned, with an excessive tightening of the respective grinding tool is avoided.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass eine der Gewindepartien entgegen einer Federkraft einer Federeinrichtung in Richtung von der Abstützfläche der die betreffende Gewindepartie aufweisenden Befestigungseinrichtung weg axial bewegbar gelagert ist und dass die werkzeugseitige Befestigungseinrichtung bis zu einer durch Dreh-Endanschläge vorgegebenen Dreh-Endlage mit der maschinenseitigen Befestigungseinrichtung verschraubbar ist.This object is achieved in that one of the thread parts against a spring force of a spring device in the direction of the support surface of the threaded portion having fastening device is mounted axially movable away and that the tool-side fastening device to a predetermined by rotary limit stops rotary end position with the Machine-side fastening device can be screwed.

Auf diese Weise kann das Festziehen nicht beliebig weit sondern nur bis zur Anlage der Dreh-Endanschläge aneinander erfolgen. Dabei ergibt sich ein Ablauf, bei dem nach genügend weitem Zusammenschrauben die beiden Abstützflächen aneinander anliegen, wonach sich bei weiterem Verdrehen des Schleifwerkzeugs die betreffende Gewindepartie entgegen der Federkraft verlagert und dabei weiter mit der anderen Gewindepartie verschraubt wird. Dieses weitere Verschrauben wird dann durch die Dreh-Endanschläge begrenzt. Auf diese Weise erhält man ein durch die Federkraft und die Dreh-Endanschläge definiertes maximales Festzieh-Drehmoment, bis zu dem das Schleifwerkzeug festgezogen werden kann. Die Federkraft wird so gewählt bzw. die die Federkraft erzeugende Federeinrichtung so ausgebildet, dass das Schleifwerkzeug zum einen im festgezogenen Zustand sicher hält und zum anderen ohne Schwierigkeiten losgeschraubt werden kann.In this way, the tightening can not be arbitrarily far but only until the investment of the rotary end stops together. This results in a sequence in which, after sufficiently far screwing together, the two support surfaces abut each other, after which the screw thread in question is displaced against the spring force as the grinding tool continues to rotate and is thereby further screwed to the other threaded portion. This further screwing is then limited by the rotary end stops. In this way one obtains a maximum tightening torque defined by the spring force and the rotary end stops, up to that of the grinding tool can be tightened. The spring force is chosen or the spring force generating spring device is formed so that the grinding tool on the one hand holds securely in the tightened state and on the other hand can be unscrewed without difficulty.

Ein weiterer Vorteil besteht darin, dass ein beim Betrieb möglicherweise auf das Schleifwerkzeug ausgeübtes Drehmoment in Löserichtung nicht zum Lösen des Schleifwerkzeugs führt, solange die Federkraft wirksam ist.A further advantage is that a torque possibly exerted on the grinding tool during operation in the release direction does not lead to loosening of the grinding tool, as long as the spring force is effective.

Zweckmäßige Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous embodiments of the invention are specified in the subclaims.

Nachstehend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung erläutert. Es zeigen:

Figur 1
einen mittels einer erfindungsgemäßen Vorrichtung mit dem Abtriebsteil einer Werkzeugmaschine verbundenen Schleifteller im Querschnitt,
Figur 2
die Anordnung nach Figur 1 ohne das Abtriebsteil in explodierter Darstellungsweise,
Figur 3
den Schleifteller der Anordnung nach den Figuren 1 und 2 in Draufsicht (in Figur 2 von oben) und
Figur 4
das Basisteil der maschinenseitigen Befestigungseinrichtung in Draufsicht (in Figur 2 von oben).
An embodiment of the invention will be explained with reference to the drawing. Show it:
FIG. 1
a grinding plate connected in cross section by means of a device according to the invention with the driven part of a machine tool,
FIG. 2
the arrangement of Figure 1 without the stripping section in an exploded view,
FIG. 3
the sanding pad of the arrangement according to Figures 1 and 2 in plan view (in Figure 2 from above) and
FIG. 4
the base part of the machine-side fastening device in plan view (in Figure 2 from above).

Aus der Zeichnung geht ein Schleifwerkzeug 1 in Gestalt eines Schleiftellers zur schleifenden Bearbeitung von Werkstücken hervor, an dessen Unterseite 2 ein in der Zeichnung nicht dargestellter Schleifbelag auswechselbar angebracht wird. Anstelle eines Schleiftellers könnte es sich auch um eine Schleifscheibe handeln. Das Schleifwerkzeug 1 wird mit einem Abtriebsteil 3 einer motorischen Werkzeugmaschine lösbar drehfest verbunden, so dass es beim Betrieb, wenn die Werkzeugmaschine eingeschaltet ist, eine rotierende Bewegung ausführt. Die weitere Ausbildung des Abtriebsteils 3 im Einzelnen interessiert in Zusammenhang mit der vorliegenden Erfindung nicht weiter.From the drawing, a grinding tool 1 in the form of a grinding plate for the abrasive machining of workpieces is apparent, on the underside 2 a not in the drawing shown abrasive coating is interchangeable attached. Instead of a sanding plate, it could also be a grinding wheel. The grinding tool 1 is releasably rotatably connected to a driven part 3 of a motor machine tool, so that it performs a rotating movement during operation, when the machine tool is turned on. The further development of the driven part 3 in detail is of no further interest in connection with the present invention.

Das Verbinden des Schleifwerkzeugs 1 mit dem Abtriebsteil 3 erfolgt mittels einer werkzeugseitigen Befestigungseinrichtung 4 und einer maschinenseitigen Befestigungseinrichtung 5, die jeweils eine Gewindepartie 6 bzw. 7 aufweisen und über ihre Gewindepartien 6, 7 miteinander verschraubt werden. Eine der Gewindepartien, zweckmäßigerweise die werkzeugseitige Gewindepartie 6, weist ein Innengewinde 8 auf. Dementsprechend bildet die andere Gewindepartie, zweckmäßigerweise die maschinenseitige Gewindepartie 7, ein mit dem Innengewinde 8 zusammenwirkendes Außengewinde 9.The bonding of the grinding tool 1 to the driven part 3 takes place by means of a tool-side fastening device 4 and a machine-side fastening device 5, each having a threaded portion 6 and 7 and are screwed together via their threaded sections 6, 7. One of the threaded sections, expediently the tool-side threaded portion 6, has an internal thread 8. Accordingly, the other threaded portion, expediently the machine-side threaded portion 7, forms an external thread 9 cooperating with the internal thread 8.

Prinzipiell könnte die Anordnung jedoch auch umgekehrt so sein, dass die werkzeugseitige Befestigungseinrichtung mit einem Außengewinde und die maschinenseitige Befestigungseinrichtung mit einem Innengewinde versehen ist.In principle, however, the arrangement could also be reversed so that the tool-side fastening device is provided with an external thread and the machine-side fastening device with an internal thread.

Die werkzeugseitige Befestigungseinrichtung 4 mit der das Innengewinde 8 tragenden Gewindepartie 6 ist ein fester Bestandteil des Schleifwerkzeugs 1, das beim Ausführungsbeispiel von einem die werkzeugseitige Befestigungseinrichtung 4 aufweisenden Werkzeug-Oberteil 10 aus Hartkunststoff gebildet wird, an dessen Unterseite ein weicherer Schaumstoffkörper 11 angesetzt ist, an dem unten der Schleifbelag angebracht wird.The tool-side fastening device 4 with the internal thread 8 bearing threaded portion 6 is an integral part of the grinding tool 1, which formed in the embodiment of a tool-side fastening device 4 having tool upper part 10 made of hard plastic is at the bottom of a softer foam body 11 is attached to the bottom of the abrasive coating is attached.

Die maschinenseitige Befestigungseinrichtung 5 besteht, wie noch beschrieben wird, aus mehreren Einzelteilen und wird fest mit dem Abtriebsteil 3 verbunden, so dass sie an der Werkzeugmaschine verbleibt. Es versteht sich, dass sie beispielsweise zu Reparaturzwecken auch wieder weggenommen werden kann.The machine-side fastening device 5 consists, as will be described, of several individual parts and is firmly connected to the driven part 3, so that it remains on the machine tool. It is understood that it can also be taken away for repair purposes, for example.

Schraubt man das Schleifwerkzeug 1 mit seinem Innengewinde 8 auf das Außengewinde 9 der an der Werkzeugmaschine sitzenden werkzeugseitigen Befestigungseinrichtung 4, gelangt eine Abstützfläche 12 der werkzeugseitigen Befestigungseinrichtung 4 zur Anlage an eine Abstützfläche 13 der maschinenseitigen Befestigungseinrichtung 5, so dass sich das Schleifwerkzeug 1 über die Abstützflächen 12, 13 maschinenseitig abstützt. Beide Abstützflächen 12, 13 weisen eine ringförmige Gestalt auf und sind koaxial zur Rotationsachse 14 des Abtriebsteils 3 und somit auch des Schleifwerkzeugs 1 angeordnet. Dabei wird die werkzeugseitigen Abstützfläche 12 von der Stirnseite der werkzeugseitigen Gewindepartie 6 und die maschinenseitige Abstützfläche 13 von der Unterseite eines Basiselements 15 der maschinenseitigen Befestigungseinrichtung 5 gebildet. Das Basiselement 15 steht in radialer Richtung über die Gewindepartie 7 der maschinenseitigen Befestigungseinrichtung 5 vor. An diesem vorstehenden Bereich ist die maschinenseitige Abstützfläche 13 angeordnet.If the grinding tool 1 with its internal thread 8 is screwed onto the external thread 9 of the tool-side fastening device 4 seated on the machine tool, a support surface 12 of the tool-side fastening device 4 comes into contact with a support surface 13 of the machine-side fastening device 5, so that the grinding tool 1 extends over the support surfaces 12, 13 supported on the machine side. Both support surfaces 12, 13 have an annular shape and are arranged coaxially to the axis of rotation 14 of the driven part 3 and thus also of the grinding tool 1. In this case, the tool-side support surface 12 is formed by the end face of the tool-side threaded portion 6 and the machine-side support surface 13 from the underside of a base member 15 of the machine-side fastening device 5. The base element 15 protrudes in the radial direction beyond the threaded portion 7 of the machine-side fastening device 5. At this projecting area, the machine-side support surface 13 is arranged.

Eine der beiden Befestigungseinrichtungen, zweckmäßigerweise die maschinenseitige Befestigungseinrichtung 5, enthält eine Federeinrichtung 16 zweckmäßigerweise in Gestalt einer Tellerfeder 17. Dabei ist die Anordnung so getroffen, dass die maschinenseitige Gewindepartie 7 entgegen der Federkraft der Federeinrichtung 16 in Richtung von der maschinenseitigen Abstützfläche 13 weg axial bewegbar gelagert ist. Hierdurch wird erreicht, dass beim Aufschrauben des Schleifwerkzeugs 1, wenn seine Abstützfläche 12 zur Anlage an die maschinenseitige Abstützfläche 13 gelangt ist, das Schleifwerkzeug 1 noch weiter im Sinne eines Aufschraubens verdreht werden kann, wobei die maschinenseitige Gewindepartie 7 entgegen der Federkraft weiter in das werkzeugseitige Innengewinde 8 sozusagen hineingezogen wird. Das Festzieh-Drehmoment, mit dem das Schleifwerkzeug 1 an der maschinenseitigen Gewindepartie 7 und der maschinenseitigen Abstützfläche 13 festgezogen wird, wird somit durch die Kraft der Federeinrichtung 16 bestimmt.One of the two fastening devices, expediently the machine-side fastening device 5, contains a spring device 16 expediently in the form of a plate spring 17. The arrangement is such that the machine-side threaded portion 7 is mounted against the spring force of the spring device 16 in the direction of the machine-side support surface 13 away axially movable. This ensures that when screwing the grinding tool 1, when its support surface 12 has come to rest against the machine-side support surface 13, the grinding tool 1 can be further rotated in the sense of unscrewing, the machine-side threaded portion 7 against the spring force further into the tool side Internal thread 8 is pulled in, so to speak. The tightening torque with which the grinding tool 1 is tightened on the machine-side threaded portion 7 and the machine-side support surface 13 is thus determined by the force of the spring device 16.

Das unter dem Verlagern der maschinenseitigen Gewindepartie 7 entgegen der Federkraft erfolgende weitere Verschrauben des Schleifwerkzeugs 1 ist begrenzt. Hierzu weisen die werkzeugseitige Befestigungseinrichtung 4 und die maschinenseitige Befestigungseinrichtung 5 jeweils mindestens einen Dreh-Endanschlag 18 bzw. 19 auf, die die Dreh-Endlage bestimmen, bis zu der das Schleifwerkzeug 1 verdreht werden kann. In dieser Drehendlage kommt der mindestens eine Dreh-Endanschlag 18 des Schleifwerkzeugs 1 in Umfangsrichtung zur Anlage an den mindestens einen Dreh-Endanschlag 19 der maschinenseitigen Befestigungseinrichtung 5.The taking place under the displacement of the machine-side threaded portion 7 against the spring force further screwing of the grinding tool 1 is limited. For this purpose, the tool-side fastening device 4 and the machine-side fastening device 5 each have at least one rotary end stop 18 and 19, which determine the rotary end position, to which the grinding tool 1 can be rotated. In this rotary end position, the at least one rotary end stop 18 of the grinding tool 1 comes to rest in the circumferential direction against the at least one rotary end stop 19 of the machine-side fastening device 5.

Auf diese Weise ist das maximale Festzieh-Drehmoment vorbestimmt. Ein stärkeres Festziehen des Schleifwerkzeugs ist nicht möglich.In this way, the maximum tightening torque is predetermined. A stronger tightening of the grinding tool is not possible.

Dabei erfolgt das Festziehen nicht praktisch abrupt wie im üblichen Falle einer starren Anordnung der maschinenseitigen Gewindepartie relativ zur zugeordneten Abstützfläche sondern über einen längeren Drehweg hinweg entgegen der Federkraft, bis die End-Drehlage erreicht ist.The tightening is not practically abrupt as in the usual case of a rigid arrangement of the machine-side threaded portion relative to the associated support surface but over a longer rotational path away against the spring force until the final rotational position is reached.

Aus der Zeichnung ist ferner ersichtlich, das zweckmäßigerweise drei gleichmäßig über den Umfang verteilte werkzeugseitige Dreh-Endanschläge 18 und dementsprechend drei maschinenseitige Dreh-Endanschläge 19 vorgesehen sind.From the drawing it is also apparent that advantageously three evenly distributed over the circumference tool-side rotary end stops 18 and accordingly three machine-side rotary end stops 19 are provided.

Die beiden Gewindepartien 6, 7 sind aus Platzgründen in axialer Richtung möglichst kurz ausgebildet. Insbesondere im Zusammenhang hiermit ist es vorteilhaft, dass die beiden Gewindepartien 6, 7 jeweils ein mehrgängiges Gewinde mit mindestens zwei winkelversetzt zueinander angeordneten Gewindegängen aufweisen. Beim zweckmäßigen Ausführungsbeispiel weist sowohl das werkzeugseitige Innengewinde 8 als auch das maschinenseitige Außengewinde 9 drei solche Innengewindegänge 20 bzw. Außengewindegänge 21 auf. Die Außengewindegänge 21 sind in Umfangsrichtung verhältnismäßig kurz ausgebildet und hintereinander angeordnet, ohne dass sie sich überlappen. Dabei ist zwischen den einzelnen Außengewindegängen 21 ein Abstand vorgesehen, so dass in Figur 2 bei der maschinenseitigen Gewindepartie 7 nur einer der drei Außengewindegänge 21 sichtbar ist.The two thread sections 6, 7 are formed as short as possible in the axial direction for reasons of space. In particular in connection with this, it is advantageous that the two threaded sections 6, 7 each have a multi-start thread with at least two angularly offset to each other arranged threads. In the expedient embodiment, both the tool-side internal thread 8 and the machine-side external thread 9 have three such internal threads 20 and external threads 21. The external threads 21 are relatively short in the circumferential direction and arranged one behind the other without overlapping. In this case, a distance is provided between the individual external threads 21, so that only one of the three external threads 21 is visible in FIG. 2 in the case of the machine-side thread part 7.

Der Drehwinkel, über den hinweg die beiden Gewindepartien 6, 7 miteinander in Gewindeeingriff stehen, sollte wegen der drei Dreh-Endanschlagspaare 18, 19 kleiner als 120° sein. Wäre nur ein solches Dreh-Endanschlagspaar vorhanden, müsste der maximale Drehwinkel kleiner als 360° sein.The angle of rotation, over which the two threaded sections 6, 7 are in threaded engagement with one another, should be less than 120 ° because of the three rotary end stop pairs 18, 19. If only such a rotary end stop pair were present, the maximum angle of rotation would have to be less than 360 °.

Die maschinenseitige Gewindepartie 7 wird von einem Gewindeteil 22 gebildet, das in axialer Richtung dem bereits erwähnten Basiselement 15 benachbart ist. Dabei befindet sich das Basiselement 15 an der bei befestigtem Schleifwerkzeug 1 diesem entgegengesetzten Seite des Gewindeteils 22. Das Basiselement 15 und das Gewindeteil 22 sind voneinander gesonderte Teile.The machine-side Gewindepartie 7 is formed by a threaded portion 22 which is adjacent to the aforementioned base member 15 in the axial direction. In this case, the base member 15 is located at the attached with abrasive tool 1 this opposite side of the threaded portion 22. The base member 15 and the threaded portion 22 are separate parts.

Wie ebenfalls bereits erwähnt, steht das Basiselement 15 in radialer Richtung, zweckmäßigerweise umlaufend, über das Gewindeteil 22 vor und weist an dem vorstehenden Bereich die Abstützfläche 13 auf.As also already mentioned, the base element 15 protrudes in the radial direction, expediently circumferentially, over the threaded part 22 and has the supporting surface 13 on the projecting area.

Die die beschriebene Federkraft erzeugende Federeinrichtung 16 greift von der dem Basiselement 15 entgegengesetzten Seite her am Gewindeteil 22 an. Das Gewindeteil 22 weist eine dosenartige Gestalt mit einem dem Basiselement 15 zugewandten Boden 23 auf, von dem die Gewindepartie 7 absteht. Die Federeinrichtung 16, d.h. die Tellerfeder 17, ist in den von der Gewindepartie 7 umschlossenen Raum des Gewindeteils 22 eingesetzt und wirkt mit dem Gewindeteil-Boden 23 zusammen.The described spring force generating spring device 16 engages from the base member 15 opposite side of the threaded portion 22 at. The threaded portion 22 has a can-like shape with a base element 15 facing the bottom 23, from which projects the threaded portion 7. The spring means 16, i. the plate spring 17 is inserted into the space enclosed by the threaded portion 7 of the threaded portion 22 and cooperates with the threaded portion bottom 23.

Das Basiselement 15 und das Gewindeteil 22 sind im montierten Zustand unverdrehbar und in axialer Richtung relativ zueinander bewegbar miteinander verbunden. Hierzu sind das Basiselement 15 und das Gewindeteil 22 drehfest ineinander gesteckt. Zu diesem Zwecke sind beim Ausführungsbeispiel am Gewindeteil 22 über den Umfang verteilt angeordnete taschenartige Ausnehmungen 24 vorgesehen, die zum Basiselement 15 hin offen sind. Diesen taschenartigen Ausnehmungen 24 ist jeweils ein Steckvorsprung 25 am Basiselement 15 zugeordnet. Die in die taschenartigen Ausnehmungen 24 eingesteckten Steckvorsprünge 25 stellen eine drehfeste, dabei jedoch axial bewegliche Verbindung her.The base member 15 and the threaded portion 22 are non-rotatable in the assembled state and in the axial direction relative to each other movably connected to each other. For this purpose, the base member 15 and the threaded portion 22 rotatably inserted into each other. For this purpose, in the embodiment of the threaded portion 22 distributed over the circumference arranged pocket-like recesses 24 are provided which are open to the base member 15. These pocket-like recesses 24 are each assigned a plug projection 25 on the base element 15. The inserted into the pocket-like recesses 24 plug-in projections 25th make a non-rotatable, but axially movable connection.

Die Federeinrichtung 16, das Gewindeteil 22 und das Basisteil 15 werden in dieser Reihenfolge von einer Feststellschraube 26 durchgriffen, mit der die maschinenseitige Befestigungseinrichtung 5 an dem Abtriebsteil 3 fixiert wird. Dabei wird die Feststellschraube 26 mit ihrem aus dem Basisteil 15 vorstehenden Bereich in das Abtriebsteil 3 eingeschraubt.The spring device 16, the threaded part 22 and the base part 15 are penetrated in this order by a locking screw 26, with which the machine-side fastening device 5 is fixed to the driven part 3. The locking screw 26 is screwed with its protruding from the base portion 15 projecting portion in the driven part 3.

Damit das maximale Festzieh-Drehmoment des Schleifwerkzeugs 1 unabhängig davon ist, wie fest die Feststellschraube 26 angezogen ist, ist eine Distanzbüchse 27 vorhanden, die fluchtend zueinander angeordnete Axialausnehmungen 28, 29 des Gewindeteils 22 und der Federeinrichtung 16 durchgreift und sich am Basiselement 15 abstützt. Die Distanzbüchse 27 sichert ferner die Federeinrichtung 16 in axialer Richtung. Letzteres erfolgt mittels eines radial vorstehenden Ringbunds 30 der Distanzbüchse 27, der die Federeinrichtung 16 um deren Axialausnehmung 29 herum untergreift. Die Feststellschraube 26 verläuft durch die die Axialausnehmungen 28, 29 des Gewindeteils 22 und der Federeinrichtung 16 sozusagen auskleidende Distanzbüchse 27 und eine axiale Bohrung 31 des Basiselements 15. Die Feststellschraube 16 weist an ihrem der Distanzbüchse 27 zugewandten Ende einen radial vorstehenden Schraubenkopf 32 auf, der - unmittelbar oder über ein Zwischenelement - gegen die Distanzbüchse 27 wirkt, so dass bei im Abtriebsteil 3 festgeschraubter Feststellschraube 26 die Distanzbüchse 27 zwischen dem Schraubenkopf 32 und dem Basiselement 15 verspannt ist. Auf diese Weise bleiben die Federeinrichtung 16 und das Gewindeteil 22 unbeeinflusst davon, wie stark die Feststellschraube 26 festgezogen wird.Thus, the maximum tightening torque of the grinding tool 1 is independent of how tight the locking screw 26 is tightened, a spacer bushing 27 is provided, the aligned axial recesses 28, 29 of the threaded portion 22 and the spring means 16 passes through and is supported on the base member 15. The spacer bushing 27 also secures the spring device 16 in the axial direction. The latter is done by means of a radially projecting annular collar 30 of the spacer bushing 27, which engages around the spring means 16 about the axial recess 29 around. The locking screw 26 extends through the Axialausnehmungen 28, 29 of the threaded portion 22 and the spring means 16, so to speak, lining bushing 27 and an axial bore 31 of the base member 15. The locking screw 16 has at its the spacer bush 27 facing the end of a radially projecting screw head 32, the - Acts directly or via an intermediate element - against the spacer bushing 27, so that when tightened in the stripping section 3 locking screw 26, the spacer bushing 27 is clamped between the screw head 32 and the base member 15. In this way, the spring means 16 and the threaded portion 22 remain unaffected by how much the locking screw 26 is tightened.

Der Schraubenkopf 32 weist einen Innensechskant für ein Drehwerkzeug auf.The screw head 32 has a hexagon socket for a turning tool.

Die Distanzbüchse 27 weist an ihrem dem nach radial außen vorstehenden Ringbund 30 entgegengesetzten Ende einen nach radial innen hin gerichteten Ringabsatz 33 auf, an dem der in das Innere der Distanzbüchse 27 eintauchende Schraubenkopf 32 angreift.The spacer bushing 27 has at its radially outwardly projecting annular collar 30 opposite end on a radially inwardly directed annular shoulder 33 on which engages the dipping into the interior of the spacer bushing screw head 32 32.

Der Ringabsatz 33 umschließt eine Durchtrittsöffnung 34 für den Durchtritt der Feststellschraube 26.The annular shoulder 33 encloses a passage opening 34 for the passage of the locking screw 26th

Das Basiselement 15 weist zumindest in seinem in radialer Richtung über die maschinenseitige Gewindepartie 7 vorstehenden Bereich eine plattenartige Gestalt auf.The base element 15 has a plate-like shape at least in its region projecting in the radial direction beyond the machine-side threaded portion 7.

Die maschinenseitigen Dreh-Endanschläge 19 sind an dem Basiselement 15 angeordnet. Dabei ist zweckmäßigerweise vorgesehen, dass die Dreh-Endanschläge 19 am Umfang des Basiselements 15 nach radial außen vorstehen.The machine-side rotary end stops 19 are arranged on the base element 15. It is expediently provided that the rotary end stops 19 protrude radially outward on the circumference of the base element 15.

Die Dreh-Endanschläge 18 der werkzeugseitigen Befestigungseinrichtung 4 können jeweils von der in Umfangsrichtung weisenden Stirnseite 35 einer leistenartigen Anformung 36 gebildet werden, die radial außerhalb der werkzeugseitigen Abstützfläche 12 angeordnet ist und sich in Umfangsrichtung erstreckt. Die bei montiertem Schleifwerkzeug 1 dem Basisteil 15 der maschinenseitigen Befestigungseinrichtung 5 zugewandte Oberseite 37 der leistenartigen Anformungen 36 verläuft der Steigung des Innengewindes 8 entsprechend geneigt, so dass die leistenförmigen Anformungen 36 das Aufschrauben des Schleifwerkzeugs 1 nicht behindern.The rotary end stops 18 of the tool-side fastening device 4 can each be formed by the circumferentially facing end face 35 of a strip-like projection 36, which is arranged radially outside the tool-side support surface 12 and extends in the circumferential direction. The mounted on the grinding tool 1 the base part 15 of the machine-side fastening means 5 facing top 37 of the strip-like projections 36 of the slope of the internal thread 8 correspondingly inclined, so that the strip-shaped projections 36 do not hinder the screwing of the grinding tool 1.

Claims (18)

  1. Device for releasably connecting a plate- or disk-shaped grinding tool to a machine tool driving the tool to perform a rotary movement in operation, with a mounting device (4) on the tool and a mounting device (5) on the machine, each including a threaded section (6, 7) and bolted to the other by way of their threaded sections, wherein one threaded section has a male thread (9) and the other threaded section has a female thread (8) and wherein the two mounting devices are supported against one another by way of supporting surfaces (12, 13) in the bolted-together state, characterised in that one (7) of the threaded sections is mounted for axial movement away from the supporting surface (13) of the mounting device (5) with the relevant threaded section (7) against the force of a spring device (16), and in that the mounting device (4) on the tool can be bolted to the mounting device (5) on the machine up to a rotary end position preset by rotary end stops (18, 19).
  2. Device according to claim 1, characterised in that the two threaded sections (6, 7) are in mutual engagement over a maximum rotary angle of less than 360°.
  3. Device according to claim 2, characterised in that each threaded section (6, 7) has a multiple thread (8, 9) with at least two courses (20, 21) arranged with angular offset relative to one another.
  4. Device according to claim 3, characterised in that each threaded section (6, 7) has a triple thread (8, 9).
  5. Device according to any of claims 1 to 4, characterised in that the threaded section (7) movable against spring force is located on the mounting device (5) on the machine.
  6. Device according to any of claims 1 to 5, characterised in that the male thread (9) is located on the threaded section (7) of the mounting device (5) on the machine and the female thread (8) is located on the threaded section (6) of the mounting device (4) on the tool.
  7. Device according to claim 6, characterised in that the mounting device (5) on the machine incorporates a threaded part (22) representing its threaded section (7), which is adjacent in the axial direction to a base element (15) separate from the threaded part (22), which projects beyond the threaded section (7) and forms the supporting surface (13) on the machine, the spring device (16) generating the spring force acting on the threaded part (22) from the side opposite the base element (15).
  8. Device according to any of claims 1 to 7, characterised in that the spring device (16) is represented by a Belleville spring (17).
  9. Device according to claim 7 or 8, characterised in that the base element (15) and the threaded part (22) are non-rotatably plugged into one another.
  10. Device according to any of claims 7 to 9, characterised in that the threaded part (22) has a can-like shape with a base (23) facing the base element (15), from which the threaded section (7) projects.
  11. Device according to claim 10, characterised in that the spring device (16) acts together with the base (23) of the threaded section (22).
  12. Device according to any of claims 7 to 11, characterised in that a clamping bolt (26) securing the mounting device (5) on the machine to an output part (3) of the machine tool passes through the spring device (16), the threaded part (22) and the base part (15) in that order.
  13. Device according to claim 12, characterised in that the threaded part (22) and the spring device (16) have axial recesses (28, 29) in alignment with one another, through which passes a spacer bush (27) axially supported on the base element (15) on the one hand while axially securing the spring device (16) on the other hand, through which and an axial bore (31) of the base element (15) the clamping bolt (26) extends, its radially projecting head (32) or an intermediate element acting against the spacer bush (27).
  14. Device according to any of claims 7 to 13, characterised in that at least the section of the base element (15) which radially projects beyond the threaded section (7) has a plate-like shape.
  15. Device according to any of claims 7 to 14, characterised in that the base element (15) forms at least one rotary end stop (19) acting together with a rotary end stop (18) on the mounting device (4) on the tool.
  16. Device according to claim 15, characterised in that the at least one rotary end stop (19) of the base element (15) radially projects in the outward direction from the circumference of the base element (15).
  17. Device according to any of claims 6 to 16, characterised in that the mounting device (4) on the tool incorporates at least one rotary end stop (18) acting together with a rotary end stop (19) on the mounting device (5) on the machine.
  18. Device according to claim 17, characterised in that the at least one rotary end stop (18) of the mounting device (4) on the tool is represented by the circumferentially oriented end face (35) of a rail-like integral element (36) located radially outside the supporting surface (12) on the tool and extending in the circumferential direction, its top surface (37) being inclined to match the pitch of the female thread (8).
EP20040027659 2004-01-10 2004-11-22 Device for mounting a grinding tool to a machine tool Active EP1559509B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004001580 2004-01-10
DE200410001580 DE102004001580B3 (en) 2004-01-10 2004-01-10 Coupling device securing polishing disc to rotary machine tool has fixing part associated with polishing disc screwed to fixing part associated with machine tool drive

Publications (2)

Publication Number Publication Date
EP1559509A1 EP1559509A1 (en) 2005-08-03
EP1559509B1 true EP1559509B1 (en) 2007-01-10

Family

ID=34609522

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040027659 Active EP1559509B1 (en) 2004-01-10 2004-11-22 Device for mounting a grinding tool to a machine tool

Country Status (2)

Country Link
EP (1) EP1559509B1 (en)
DE (2) DE102004001580B3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005060514A1 (en) 2005-12-12 2007-06-14 Festool Gmbh Disc sander and sanding pad for a disc sander
DE102013009129B4 (en) * 2013-05-31 2020-10-01 Prime Supply Inc. Improved Abrasive Device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3537935A1 (en) * 1985-09-20 1987-04-30 Fabritius Hans Josef Improved dust extraction device for grinding apparatuses having a rotating grinding disc
IT221984Z2 (en) * 1991-10-29 1994-12-29 Taf Srl ABRASIVE DISC FOR GRINDING MACHINES, WITH PERFECTED HOOKING DEVICES
DE10056211A1 (en) * 2000-11-13 2002-05-23 Neudecker & Jolitz Gmbh & Co Rapid clamp nut is divided into inner body with spindle opening and connected outer body movable relative to each other via gears to allow very high pressure of pressing body on tool

Also Published As

Publication number Publication date
DE502004002616D1 (en) 2007-02-22
EP1559509A1 (en) 2005-08-03
DE102004001580B3 (en) 2005-06-23

Similar Documents

Publication Publication Date Title
EP3135439B1 (en) Adapter system for fixing a tool to an oscillating drivable drive section
WO1988004975A1 (en) Clamping device for releasably holding a tool, in particular a disk
CH670063A5 (en)
DE4239559C2 (en) Hand tool with a blocking device for blocking the tool spindle when changing tools
EP1340574B1 (en) Hand milling machine
DE102006061757A1 (en) Stripping part on a hand tool
DE102018126997A1 (en) Clamping bolt, table top and clamping system
DE3917345A1 (en) Non-slip wheel clamping device for angle grinder - has serrated collar and wheel flange faces to increase clamping according to wheel loading
EP1559509B1 (en) Device for mounting a grinding tool to a machine tool
EP3411185B1 (en) Clamping device
DE3302239A1 (en) Connecting element
DE2463427C2 (en)
WO2012143333A1 (en) Device for tightening or loosening a nut
DE102012102681A1 (en) Tool unit for use with quick-release mechanism for adjustable front plates, comprises lever with handle and both ends formed as rotatable end portions, where pin is rotated by rotating lever for adjusting distance between two front plates
CH499365A (en) Chucks for tools
EP2050539A1 (en) Grinding wheel for cutting objects, in particular stones, bricks or similar, or wheel bodies or abrasive rings or lock-piece for such an abrasive ring
DE19938299A1 (en) Power tool for a circular saw or other rotating tool has a locking pin moved in an out of action by a rotating tool key to work with a block to replace or exchange the tool in a simple action without a special locking tool
DE1136185B (en) Turning tool with exchangeable cutting plate
DE202009004125U1 (en) locking device
DE102013210268B4 (en) Safety system for power screwdrivers and power wrenches
DE10351945B4 (en) Clamping device for clamping an object against a stop
CH570243A5 (en) Reversible nut running head for electric drill - has spring loaded adjustable torque slipping clutch for detachable tools
DE2415820A1 (en) Clamping chuck for milling cutters - has pin with sloping slot for quick tightening and releasing of cutter
DE20318946U1 (en) Arrangement for determining a rotationally drivable tool
DE3236538A1 (en) Tool for turning a threaded head

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20050118

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK YU

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

AKX Designation fees paid

Designated state(s): DE FR GB IT

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20070110

REF Corresponds to:

Ref document number: 502004002616

Country of ref document: DE

Date of ref document: 20070222

Kind code of ref document: P

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20071011

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502004002616

Country of ref document: DE

Representative=s name: PATENTANWAELTE MAGENBAUER & KOLLEGEN, DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 502004002616

Country of ref document: DE

Owner name: FESTOOL GROUP GMBH & CO. KG, DE

Free format text: FORMER OWNER: FESTOOL GMBH, 73240 WENDLINGEN, DE

Effective date: 20121119

Ref country code: DE

Ref legal event code: R082

Ref document number: 502004002616

Country of ref document: DE

Representative=s name: PATENTANWAELTE MAGENBAUER & KOLLEGEN, DE

Effective date: 20121119

Ref country code: DE

Ref legal event code: R082

Ref document number: 502004002616

Country of ref document: DE

Representative=s name: PATENTANWAELTE MAGENBAUER & KOLLEGEN PARTNERSC, DE

Effective date: 20121119

Ref country code: DE

Ref legal event code: R081

Ref document number: 502004002616

Country of ref document: DE

Owner name: FESTOOL GMBH, DE

Free format text: FORMER OWNER: FESTOOL GMBH, 73240 WENDLINGEN, DE

Effective date: 20121119

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502004002616

Country of ref document: DE

Representative=s name: PATENTANWAELTE MAGENBAUER & KOLLEGEN PARTNERSC, DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502004002616

Country of ref document: DE

Representative=s name: PATENTANWAELTE MAGENBAUER & KOLLEGEN PARTNERSC, DE

Effective date: 20141104

Ref country code: DE

Ref legal event code: R081

Ref document number: 502004002616

Country of ref document: DE

Owner name: FESTOOL GMBH, DE

Free format text: FORMER OWNER: FESTOOL GROUP GMBH & CO. KG, 73240 WENDLINGEN, DE

Effective date: 20141104

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 12

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230519

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20231123

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20231130

Year of fee payment: 20

Ref country code: FR

Payment date: 20231122

Year of fee payment: 20

Ref country code: DE

Payment date: 20231128

Year of fee payment: 20