EP0380974B2 - Grinding machine with an adaptator for the clamping of a supplementary tool - Google Patents

Grinding machine with an adaptator for the clamping of a supplementary tool Download PDF

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Publication number
EP0380974B2
EP0380974B2 EP19900101008 EP90101008A EP0380974B2 EP 0380974 B2 EP0380974 B2 EP 0380974B2 EP 19900101008 EP19900101008 EP 19900101008 EP 90101008 A EP90101008 A EP 90101008A EP 0380974 B2 EP0380974 B2 EP 0380974B2
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EP
European Patent Office
Prior art keywords
flange
bolt
spindle
positive
grinding machine
Prior art date
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Expired - Lifetime
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EP19900101008
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German (de)
French (fr)
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EP0380974B1 (en
EP0380974A2 (en
EP0380974A3 (en
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C&E Fein GmbH and Co
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C&E Fein GmbH and Co
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/16—Longitudinal screw clamp
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9372—Rotatable type
    • Y10T83/9377—Mounting of tool about rod-type shaft
    • Y10T83/9379—At end of shaft

Definitions

  • the invention relates to a grinding machine with a grinding spindle, which has a hollow spindle with a mating flange firmly connected to it and a form-fitting piece, as well as a traction spindle which can be displaced in the axial direction in the hollow spindle, the latter comprising a receptacle for a manually fixable and releasable holding element a bolt which carries the holding element at one end and carries a flange at an opposite end which is adjustable in the axial direction of the bolt relative to the latter from a mounting position into a securing position and vice versa, the flange having a form-locking counterpart which can be brought into engagement with the form-fitting piece , and whereby the bolt inserted into the grinding spindle is fixed non-rotatably on the grinding spindle in the receptacle in the direction of a further fixing movement of the holding element by the flange standing in the securing position.
  • Such grinding machines are known from EP-A-0 152 564, in which, however, no adapter is provided, but a holding flange is connected to the holding element, and thus the tool can be clamped between the counter flange and the holding flange by displacing the tension spindle.
  • the invention is therefore based on the object of providing a grinding machine in which it is possible to fasten an additional tool suitable for a standard fastening.
  • the bolt carries an adapter with a standard fastening at its end opposite the holding element, in that the flange has a threaded bore which is penetrated by a threaded section of the bolt, and in that the Bolt carries a collar, which rests on the flange in the secured position and prevents the bolt from turning further.
  • the object of the invention is achieved in that, in a grinding machine according to the type mentioned at the outset, the bolt carries an adapter with a standard fastening at its end opposite the holding element, and in that the flange is displaceable and non-rotatably on the bolt by positive locking elements in the axial direction of the bolt is led.
  • the advantage of the adapter according to the invention can be seen in the fact that it can be inserted into the grinding spindle exactly like the holding flange, that the holding element can be manually fixed and detached in the receptacle, and that the adapter is finally clamped in that the pulling spindle in the hollow spindle Direction is moved away from the counter flange and held spring-loaded in this position.
  • the Holding element can not perform an additional locking movement and thus after a displacement of the tension spindle in the direction of the counter flange in the position in which the adapter was also used manually, a manual release of the adapter is possible, so that the adapter without the help of an additional tool on the The grinding spindle can be fixed by moving the pull spindle and later released again.
  • the receptacle and the holding element provides that both form a screw connection, the receptacle preferably being a receiving thread and the holding element being a holding pin that can be screwed into the receiving thread.
  • the form-fitting counterpart is designed as a flange attachment with an outer polygon that fits into an inner polygon of the form-fitting piece.
  • the standard fastening is a screw connection for the additional tool provided with a fastening recess.
  • the threaded section has a thread pitch which corresponds to a thread pitch of the screw connection formed from the receptacle and holding element.
  • the collar also acts as a counter flange for the additional tool, so that it can be braced against the collar with the standard fastening.
  • the flange is guided on the bolt so as to be displaceable and non-rotatable by positive locking elements in the axial direction.
  • the non-rotatable fixation of the bolt in the grinding spindle is achieved in that it is first brought into engagement with the receptacle with the holding element, the flange remaining in the assembly position and not engaging with the form-fitting counterpart in the form-fitting piece, while then, when the holding element is engaged with the receptacle, the flange is brought into engagement with the form-fitting counterpart by sliding in the axial direction of the bolt with the form-fitting counterpart of the grinding spindle, so that the form-locking between the grinding spindle and the flange and in turn between the flange and the bolt causes the bolt to rotate non-rotatably the grinding spindle is held.
  • the positive-locking elements are designed as an external polygon provided on the bolt and as an internal polygon
  • the flange can be guided in various ways. However, it is particularly simple if the flange is guided through the form-locking elements themselves on the bolt.
  • the flange can be fixed on the bolt in the mounting position by locking elements.
  • the flange can be fixed on the bolt in the securing position by means of locking elements.
  • the form-locking elements are adapted in their cross-sectional shape to the form-locking counterpart and that the form-locking elements preferably have a cross-sectional shape which represents a reduction in the cross-sectional shape of the form-locking counterpart.
  • FIG. 2 A first exemplary embodiment of an adapter according to the invention, designated as a whole by 10, is shown in FIG. 2 in use in a grinding machine 12, the gear head 14 of which is shown partially broken away.
  • a grinding spindle 16 is arranged in the gear head 14 and carries the adapter 10, on which in turn an additional tool 18 is held by means of a standard fastening.
  • the grinding spindle 16 of the grinding machine 12 is driven in the usual way by a motor via an angular gear.
  • the grinding spindle 16 comprises a hollow spindle 20, which is provided with a counter flange 22 at its tool-side end.
  • a pulling spindle 26 is displaceably mounted in the direction of a longitudinal axis 28 of the grinding spindle 16 and is held in the direction away from the counter flange 22 by compression springs 30.
  • a manual actuation device 32 which is held on the gear head 14 on the side opposite the counter flange 22, the tension spindle 26 can be displaced against the force of the compression springs 30 via a pressure piece 34.
  • a bore 38 which is coaxial with the axis 28 and open towards the counter flange 22 and which has a receiving thread 38 as a seat for a holding element.
  • the hollow spindle 20 is provided in the tool-side section of the central recess 24, that is to say in the region of the counter flange 22, with an inner polygonal section 40 which, in deviation from a circular cross section, has flats 42, the secants of the circular cross section.
  • the adapter 10 according to the invention can now be used, which comprises a bolt 44 which carries at its foremost end a holding pin 46 forming the holding element, which can be screwed into the receiving thread 38 with its external thread.
  • the bolt 44 is thus arranged coaxially to the axis 28 in the grinding spindle 16.
  • the bolt 44 is also provided with a collar 48, one on the opposite of the retaining pin 44 Side arranged and perpendicular to the axis 28 of the grinding spindle 16 and thus also the bolt 44 extends front surface 50, which serves as a contact surface for a carrier plate 52 of the additional tool 18.
  • a fastening pin 54 of the bolt 44 which is arranged coaxially with the holding pin 46 and which passes through a fastening recess 56 in the carrier plate 52 and onto which a fastening nut 58 can be screwed, by means of which the carrier plate 52 can be screwed against the Front surface 50 of the federal government 48 is clamped.
  • the fastening pin 54 and the fastening nut 58 together form a standard fastening for the additional tool 18, the support plate 52 of which is provided with a standardized fastening recess 56.
  • the collar 48 On the side of the collar 48 opposite the front surface 50, the collar 48 is provided with a contact surface 60 running parallel to the front surface 50. Between this contact surface 60 and the holding pin 46, the bolt 44 carries a threaded section 62 which has a thread pitch which is identical to a thread pitch of the holding pin 46.
  • This threaded section 62 passes through a threaded bore 64 of a flange designated as a whole by 66 in the region of its flange extension 68.
  • a flange plate 70 which extends radially outward from this flange and is formed in such a way that it can rest on the counter flange 22, is formed on this flange extension 68 .
  • the flange shoulder 68 is in turn provided with an outer polygonal portion 72 which fits into the inner polygonal portion 40, so that it can be inserted into the central recess 24 of the hollow spindle 20 and is fixed in a rotationally fixed manner therein.
  • the flange 66 can now be moved from a secured position, in which it rests with its flange plate 70 on the contact surface 60 and also with its flange plate 70 on the counter flange 22, into an assembly position in which the collar 48 is no longer rests with the contact surface 60 on the flange plate 70, but is at a distance from it which is so large that the retaining pin 46 is no longer screwed into the receiving thread 38, as was the case in the aforementioned securing position. That is, the bolt 44 is so far displaceable relative to the flange 66 that its retaining pin 46 is fully engaged with the receiving thread 38 in the securing position, while in the mounting position the retaining pin 46 is completely unscrewed from the receiving thread 38.
  • the bolt 44 can be screwed with the holding pin 46 into the receiving thread 38 without an additional relative displacement between the flange 66 and the pull spindle 26 until the collar 48 with the contact surface 60 on Flange plate 70 abuts and the flange 66 is thus in its securing position.
  • a play-free attachment of the first embodiment of the adapter 10 according to the invention now takes place in that the manual actuating device 32 is moved from a position that does not tension the adapter, in which the pulling spindle 26 is displaced by the manual actuating device 32 via the pressure piece 34 against the force of the compression springs 30 in the direction of the counter flange 22 is moved into a position exciting the adapter 10, in which it no longer acts on the pressure piece 34 and thus the tension spindle 26 is fully exposed to the force of the compression springs 30, which strive to move them in the direction away from the counter flange 22 and thus the To move bolt 44 in the same direction, which means that the flange 66 is clamped with the flange plate 70 against the counter flange 22, so that the adapter 10 is seated in the grinding spindle 16 without play.
  • a second embodiment of the adapter according to the invention designated as a whole by 80, those parts which are identical to those of the first embodiment of the adapter 10 according to the invention are provided with the same reference numerals, so that reference can be made to the explanations for the description of the first embodiment.
  • This second embodiment 80 of the adapter according to the invention is also intended to be used in the grinding spindle 16 like the first embodiment 10 of the adapter according to the invention.
  • the additional tool 18 is also provided with the same fastening recess 56 in its carrier plate 52.
  • the adapter 80 carries according to the second Embodiment instead of the threaded portion 62, a guide portion 82 which has a cylindrical outer polygon 84, the flats 86 are arranged as secants of an arc.
  • the flange shoulder 68 is provided with an inner polygon 88.
  • the inner polygon 88 is preferably oriented relative to the outer polygonal portion 72 of the flange shoulder 68 in such a way that the flats 86 run parallel to the flats 42 and thus the inner polygon 88 has a cross section which represents a reduction in the cross section of the inner polygonal portion 40 of the hollow spindle 20.
  • the flange shoulder 68 in the form of a hollow cylinder thus lies between the inner polygonal section 40 of the hollow spindle 20 and the outer polygonal section 84 of the guide section 82.
  • the guide section 82 is provided with an annular groove 90 in which there is a spring clip 92 which resiliently radially outwards with annular recesses 94 and 96 in the internal polygonal section 40 can be brought into engagement, wherein engagement in the annular recess 94 results in a locking in the securing position and locking in the mounting position by the annular recess 96.
  • the carrier plate 52 of the additional tool 18 does not rest on a collar, but rather directly on the flange plate 70, which in turn bears against the counter flange 22.
  • the assembly of the additional tool 18 with the adapter 80 is carried out by screwing the bolt 44 with the retaining pin 46 into the receiving thread 38 when the flange 66 is locked in the assembly position. Even when the retaining pin 46 is completely screwed in, the flange 66 in the mounting position is not in engagement with the inner polygon 40 of the hollow spindle 20 with its flange extension 68.
  • the outer polygonal section 72 of the flange attachment 68 engages with the inner polygonal section 40 of the hollow spindle 20 only by moving the flange 66 with the holding pin 46 screwed into the receiving thread 38 in the direction of the counter flange 22. This displacement is possible because the flange extension 68 can slide on the guide section 82 of the bolt 44.
  • the bolt 44 is thus non-rotatably fixed in the hollow spindle 20 and thus also in the rotating spindle 16.
  • the fastening pin 44 provided over the flange plate 70 can thus be passed through the fastening recess 56, so that the fastening nut 58 bears the carrier plate 52 against the flange plate 70 of the flange 66. Tightening the fastening nut 58 using a tool is not necessary. A gentle turn is enough.
  • the pull spindle 26 can act on the bolt 44 in the direction away from the counter flange 22 , which has the consequence that the bolt 44, which is still displaceable in the axial direction in the flange 66, moves slightly with the tension spindle 26 and thus the fastening pin braces the fastening nut against the carrier plate 52 of the additional tool 18, which in turn again presses against the flange plate 70 is tensioned, which in turn rests on the counter flange 22 of the hollow spindle 20.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Description

Die Erfindung betrifft eine Schleifmaschine mit einer Schleifspindel, die eine Hohlspindel mit einem fest mit dieser verbundenen Gegenflansch und einem Formschlußstück, sowie eine in axialer Richtung in der Hohlspindel verschiebbare Zugspindel aufweist, wobei letztere eine Aufnahme für ein manuell fixier- und lösbares Halteelement umfaßt, mit einem Bolzen, welcher an einem Ende das Halteelement trägt und an einem entgegengesetzten Ende einen Flansch trägt, welcher in axialer Richtung des Bolzens gegenüber diesem von einer Montagestellung in eine Sicherungsstellung und umgekehrt verstellbar ist, wobei der Flansch ein mit dem Formschlußstück in Eingriff bringbares Formschlußgegenstück aufweist, und wobei durch den in der Sicherungsstellung stehenden Flansch der in die Schleifspindel eingesetzte Bolzen in Richtung einer weiteren Festlegebewegung des Halteelementes in der Aufnahme unverdrehbar an der Schleifspindel fixiert ist.The invention relates to a grinding machine with a grinding spindle, which has a hollow spindle with a mating flange firmly connected to it and a form-fitting piece, as well as a traction spindle which can be displaced in the axial direction in the hollow spindle, the latter comprising a receptacle for a manually fixable and releasable holding element a bolt which carries the holding element at one end and carries a flange at an opposite end which is adjustable in the axial direction of the bolt relative to the latter from a mounting position into a securing position and vice versa, the flange having a form-locking counterpart which can be brought into engagement with the form-fitting piece , and whereby the bolt inserted into the grinding spindle is fixed non-rotatably on the grinding spindle in the receptacle in the direction of a further fixing movement of the holding element by the flange standing in the securing position.

Aus der EP-A-0 152 564 sind derartige Schleifmaschinen bekannt, bei welchen jedoch kein Adapter vorgesehen ist, sondern ein Halteflansch mit dem Halteelement verbunden ist, und somit das Werkzeug zwischen Gegenflansch und Halteflansch durch Verschieben der Zugspindel einspannbar ist.Such grinding machines are known from EP-A-0 152 564, in which, however, no adapter is provided, but a holding flange is connected to the holding element, and thus the tool can be clamped between the counter flange and the holding flange by displacing the tension spindle.

Bei derartigen Schleifmaschinen besteht jedoch das Problem, daß mit dem Halteflansch lediglich Schleif- oder Trennscheiben gespannt werden können und sollen und ein Spannen anderer Zusatzwerkzeuge mit einer üblichen Standardbefestigung zumindest Schwierigkeiten bereitet.In grinding machines of this type, however, there is the problem that only grinding or cutting disks can and should be clamped with the holding flange and that clamping of other additional tools with a conventional standard fastening is at least difficult.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Schleifmaschine zu schaffen, bei der ein Befestigen eines für eine Standardbefestigung geeigneten Zusatzwerkzeugs möglich ist.The invention is therefore based on the object of providing a grinding machine in which it is possible to fasten an additional tool suitable for a standard fastening.

Diese Aufgabe wird bei einer Schleifmaschine gemäß der eingangs genannten Art erfindungsgemäß dadurch gelöst, daß der Bolzen an seinem dem Halteelement gegenüberliegenden Ende einen Adapter mit einer Standardbefestigung trägt, daß der Flansch eine Gewindebohrung aufweist, welche von einem Gewindeabschnitt des Bolzens durchsetzt ist, und daß der Bolzen einen Bund trägt, welcher in der Sicherungsstellung an dem Flansch anliegt und ein Weiterdrehen des Bolzens verhindert.This object is achieved according to the invention in a grinding machine according to the type mentioned at the outset in that the bolt carries an adapter with a standard fastening at its end opposite the holding element, in that the flange has a threaded bore which is penetrated by a threaded section of the bolt, and in that the Bolt carries a collar, which rests on the flange in the secured position and prevents the bolt from turning further.

In alternativer Weise wird die Aufgabe der Erfindung dadurch gelöst, daß bei einer Schleifmaschine gemäß der eingangs genannten Art der Bolzen an seinem dem Halteelement gegenüberliegenden Ende einen Adapter mit einer Standardbefestigung trägt und daß der Flansch durch Formschlußelemente in axialer Richtung des Bolzens verschieblich und unverdrehbar am Bolzen geführt ist.In an alternative manner, the object of the invention is achieved in that, in a grinding machine according to the type mentioned at the outset, the bolt carries an adapter with a standard fastening at its end opposite the holding element, and in that the flange is displaceable and non-rotatably on the bolt by positive locking elements in the axial direction of the bolt is led.

Der Vorteil des erfindungsgemäßen Adapters ist darin zu sehen, daß dieser genau wie der Halteflansch in die Schleifspindel einsetzbar ist, daß das Halteelement manuell in der Aufnahme fixierbar und lösbar ist und daß ein letztendliches Festspannen des Adapters dadurch erfolgt, daß die Zugspindel in der Hohlspindel in Richtung vom Gegenflansch weg verschoben und in dieser Stellung federbeaufschlagt gehalten wird. Ferner wird durch das Zusammenwirken des Flansches mit dem Bolzen in der Sicherungsstellung gewährleistet, daß das Halteelement keine zusätzliche Festlegebewegung durchführen kann und somit nach einem Verschieben der Zugspindel in Richtung auf den Gegenflansch in diejenige Position, in welcher der Adapter auch manuell eingesetzt wurde, ein manuelles Lösen des Adapters möglich ist, so daß der Adapter ohne Hilfe eines zusätzlichen Werkzeugs an der Schleifspindel durch Verschieben der Zugspindel fixiert und später wieder gelöst werden kann.The advantage of the adapter according to the invention can be seen in the fact that it can be inserted into the grinding spindle exactly like the holding flange, that the holding element can be manually fixed and detached in the receptacle, and that the adapter is finally clamped in that the pulling spindle in the hollow spindle Direction is moved away from the counter flange and held spring-loaded in this position. Furthermore, it is ensured by the interaction of the flange with the bolt in the securing position that the Holding element can not perform an additional locking movement and thus after a displacement of the tension spindle in the direction of the counter flange in the position in which the adapter was also used manually, a manual release of the adapter is possible, so that the adapter without the help of an additional tool on the The grinding spindle can be fixed by moving the pull spindle and later released again.

Eine vorteilhafte Möglichkeit, die Aufnahme und das Halteelement auszubilden, sieht vor, daß beide eine Schraubverbindung bilden, wobei vorzugsweise die Aufnahme ein Aufnahmegewinde und das Halteelement ein in das Aufnahmegewinde einschraubbarer Haltezapfen ist.An advantageous possibility of designing the receptacle and the holding element provides that both form a screw connection, the receptacle preferably being a receiving thread and the holding element being a holding pin that can be screwed into the receiving thread.

Das Formschlußgegenstück ist bei einer bevorzugten Ausführungsform als ein in einen Innenmehrkant des Formschlußstücks passender Flanschansatz mit einen Außenmehrkant ausgebildet.In a preferred embodiment, the form-fitting counterpart is designed as a flange attachment with an outer polygon that fits into an inner polygon of the form-fitting piece.

Auch bei der Ausbildung der Standardbefestigung sind mehrere Möglichkeiten denkbar. Als besonders günstig hat es sich erwiesen, wenn die Standardbefestigung eine Schraubverbindung für das mit einer Befestigungsausnehmung versehene Zusatzwerkzeug ist.Several options are also conceivable when designing the standard fastening. It has proven to be particularly favorable if the standard fastening is a screw connection for the additional tool provided with a fastening recess.

Um die Montage eines Adapters mit einem derartigen Flansch zu vereinfachen und besonders günstig zu gestalten, ist vorgesehen, daß der Gewindeabschnitt eine Gewindesteigung aufweist, welche einer Gewindesteigung der aus Aufnahme und Halteelement gebildeten Schraubverbindung entspricht. Dies hat den großen Vorteil, daß der Flansch auf dem Gegenflansch aufgesetzt werden kann und der Bolzen lediglich eingedreht werden muß, wobei er sich einerseits im Flansch so lange verschiebt bis der Bund an dem Flansch selbst anliegt und andererseits auch gleichzeitig die Schraubverbindung zwischen der Aufnahme und dem Halteelement ohne Relativverschiebung zum Flansch herstellbar ist.In order to simplify the assembly of an adapter with such a flange and to make it particularly inexpensive, it is provided that the threaded section has a thread pitch which corresponds to a thread pitch of the screw connection formed from the receptacle and holding element. This has the great advantage that the flange can be placed on the counter flange and the bolt only has to be screwed in, on the one hand it moves in the flange until the collar rests on the flange itself and on the other hand the screw connection between the receptacle and the holding element can be produced without relative displacement to the flange.

Besonders zweckmäßig hat sich im Rahmen dieser ersten Ausführungsform noch erwiesen, wenn der Bund gleichzeitig als Gegenflansch für das Zusatzwerkzeug wirkt, so daß dieses mit der Standardbefestigung gegen den Bund verspannbar ist.In the context of this first embodiment, it has also proven particularly expedient if the collar also acts as a counter flange for the additional tool, so that it can be braced against the collar with the standard fastening.

Bei dem zweiten Ausführungsbeispiel der verstellbaren Lagerung des Flansches an dem Bolzen ist vorgesehen, daß der Flansch durch Formschlußelemente in axialer Richtung des Bolzens verschieblich und unverdrehbar am Bolzen geführt ist. In diesem Fall wird also die unverdrehbare Fixierung des Bolzens in der Schleifspindel dadurch erreicht, daß dieser zunächst mit dem Halteelement in Eingriff mit der Aufnahme gebracht wird, wobei der Flansch in Montagestellung bleibt und dabei mit dem Formschlußgegenstück nicht in das Formschlußstück eingreift, während dann, wenn das Halteelement mit der Aufnahme in Eingriff ist, der Flansch durch Verschieben in axialer Richtung des Bolzens mitdem Formschlußgegenstück in Eingriff mit dem Formschlußstück der Schleifspindel gebracht wird, so daß über den Formschluß zwischen Schleifspindel und Flansch und wiederum zwischen Flansch und Bolzen der Bolzen unverdrehbar in der Schleifspindel gehalten ist. Besonders vorteilhaft ist es dabei, wenn die Formschlußelemente als auf dem Bolzen vorgesehener Außenmehrkant und als auf dem Flansch vorgesehener Innenmehrkant ausgebildet sind.In the second embodiment of the adjustable mounting of the flange on the bolt, it is provided that the flange is guided on the bolt so as to be displaceable and non-rotatable by positive locking elements in the axial direction. In this case, the non-rotatable fixation of the bolt in the grinding spindle is achieved in that it is first brought into engagement with the receptacle with the holding element, the flange remaining in the assembly position and not engaging with the form-fitting counterpart in the form-fitting piece, while then, when the holding element is engaged with the receptacle, the flange is brought into engagement with the form-fitting counterpart by sliding in the axial direction of the bolt with the form-fitting counterpart of the grinding spindle, so that the form-locking between the grinding spindle and the flange and in turn between the flange and the bolt causes the bolt to rotate non-rotatably the grinding spindle is held. It is particularly advantageous if the positive-locking elements are designed as an external polygon provided on the bolt and as an internal polygon provided on the flange.

Der Flansch kann dabei auf verschiedenerlei Weise geführtwerden. Besonders einfach ist es jedoch, wenn der Flansch durch die Formschlußelemente selbst am Bolzen geführt ist.The flange can be guided in various ways. However, it is particularly simple if the flange is guided through the form-locking elements themselves on the bolt.

Um zu verhindern, daß der Flansch frei auf dem Bolzen in axialer Richtung hin- und hergleitet und damit eventuell die Montage des Adapters beeinträchtigt, ist vorgesehen, daß der Flansch am Bolzen in der Montagestellung durch Rastelemente festlegbar ist. Zusätzlich kann es auch noch von Vorteil sein, wenn der Flansch am Bolzen in der Sicherungsstellung durch Rastelemente festlegbar ist.In order to prevent the flange from freely sliding back and forth on the bolt in the axial direction and thus possibly impairing the mounting of the adapter, it is provided that the flange can be fixed on the bolt in the mounting position by locking elements. In addition, it can also be advantageous if the flange can be fixed on the bolt in the securing position by means of locking elements.

Um eine günstige Adaption der Formschlußelemente und des Formschlußgegenstücks hinsichtlich ihrer Form zu erreichen, ist vorgesehen, daß die Formschlußelemente in ihrer Querschnittsform an das Formschlußgegenstück angepaßt sind und daß vorzugsweise die Formschlußelemente eine Querschnittsform aufweisen, die eine Verkleinerung der Querschnittsform des Formschlußgegenstücks darstellt.In order to achieve a favorable adaptation of the form-locking elements and the form-locking counterpart with regard to their shape, it is provided that the form-locking elements are adapted in their cross-sectional shape to the form-locking counterpart and that the form-locking elements preferably have a cross-sectional shape which represents a reduction in the cross-sectional shape of the form-locking counterpart.

Weitere Merkmale und Vorteile der Erfindung sind Gegenstand der nachfolgenden Beschreibung sowie der zeichnerischen Darstellung zweier Ausführungsbeispiele. In der Zeichnung zeigen:

Fig. 1
eine teilweise aufgebrochene Schnittdarstellung durch eine Schleifmaschine mit in deren Schleifspindel festliegendem Adapter sowie einem Zusatzwerkzeug;
Fig. 2
einen Schnitt durch die Schleifspindel mit in dieser aufgenommenem Adapter gemäß einem ersten Ausführungsbeispiel;
Fig. 3
einen Schnitt längs Linie 3-3 in Fig. 2;
Fig. 4
einen Schnitt durch die Schleifspindel mit in dieser aufgenommenem Adapter gemäß einem zweiten Ausführungsbeispiel und
Fig. 5
einen Schnitt längs Linie 5-5 in Fig. 4.
Further features and advantages of the invention are the subject of the following description and the drawing of two exemplary embodiments. The drawing shows:
Fig. 1
a partially broken sectional view through a grinding machine with an adapter fixed in its grinding spindle and an additional tool;
Fig. 2
a section through the grinding spindle with the adapter accommodated therein according to a first embodiment;
Fig. 3
a section along line 3-3 in Fig. 2;
Fig. 4
a section through the grinding spindle with the adapter received in this according to a second embodiment and
Fig. 5
a section along line 5-5 in Fig. 4th

Ein als Ganzes mit 10 bezeichnetes erstes Ausführungsbeispiels eines erfindungsgemäßen Adapters ist in Fig. 2 im Einsatz bei einer Schleifmaschine 12 dargestellt, deren Getriebekopf 14 teilweise aufgebrochen gezeichnet ist. In dem Getriebekopf 14 ist eine Schleifspindel 16 angeordnet, welche den Adapter 10 trägt, an dem seinerseits ein Zusatzwerkzeug 18 mittels einer Standardbefestigung gehalten ist. Die Schleifspindel 16 der Schleifmaschine 12 wird dabei in der üblichen Weise über ein Winkelgetriebe von einem Motor angetrieben.A first exemplary embodiment of an adapter according to the invention, designated as a whole by 10, is shown in FIG. 2 in use in a grinding machine 12, the gear head 14 of which is shown partially broken away. A grinding spindle 16 is arranged in the gear head 14 and carries the adapter 10, on which in turn an additional tool 18 is held by means of a standard fastening. The grinding spindle 16 of the grinding machine 12 is driven in the usual way by a motor via an angular gear.

Wie in Fig. 2 dargestellt, umfaßt die Schleifspindel 16 eine Hohlspindel 20, welche an ihrem werkzeugseitigen Ende mit einem Gegenflansch 22 versehen ist. In einervon dem werkzeugseitigen Ende sich in die Hohlspindel 20 hineinerstreckenden zentralen Ausnehmung 24 derselben ist eine Zugspindel 26 in Richtung einer Längsachse 28 der Schleifspindel 16 verschieblich gelagert und durch Druckfedern 30 in Richtung von dem Gegenflansch 22 weg beaufschlagt gehalten. Mittels einer Handbetätigungseinrichtung 32, welche an der dem Gegenflansch 22 gegenüberliegenden Seite am Getriebgekopf 14 gehalten ist, ist über ein Druckstück 34 die Zugspindel 26 gegen die Kraft der Druckfedern 30 verschiebbar.As shown in FIG. 2, the grinding spindle 16 comprises a hollow spindle 20, which is provided with a counter flange 22 at its tool-side end. In a central recess 24 extending from the tool-side end into the hollow spindle 20, a pulling spindle 26 is displaceably mounted in the direction of a longitudinal axis 28 of the grinding spindle 16 and is held in the direction away from the counter flange 22 by compression springs 30. By means of a manual actuation device 32, which is held on the gear head 14 on the side opposite the counter flange 22, the tension spindle 26 can be displaced against the force of the compression springs 30 via a pressure piece 34.

In der Zugspindel 26 ist eine zur Achse 28 koaxiale und zum Gegenflansch 22 hin offene Bohrung 38 vorgesehen, welche als Aufnahme für ein Halteelement ein Aufnahmegewinde 38 aufweist.Provided in the tension spindle 26 is a bore 38 which is coaxial with the axis 28 and open towards the counter flange 22 and which has a receiving thread 38 as a seat for a holding element.

Ferner ist die Hohlspindel 20, um das Halteelement gegen eine Verdrehung sichern zu können, im werkzeugseitigen Abschnitt der zentralen Ausnehmung 24, das heißt im Bereich des Gegenflansches 22, mit einem Innenmehrkantabschnitt 40 versehen, welche abweichend von einem kreisförmigen Querschnitt Abflachungen 42 aufweist, die Sekanten des kreisförmigen Querschnitts bilden.Furthermore, in order to be able to secure the holding element against rotation, the hollow spindle 20 is provided in the tool-side section of the central recess 24, that is to say in the region of the counter flange 22, with an inner polygonal section 40 which, in deviation from a circular cross section, has flats 42, the secants of the circular cross section.

In die Schleifspindel 16 mit den bereits bekannten Merkmalen ist nun der erfindungsgemäße Adapter 10 einsetzbar, welcher einen Bolzen 44 umfaßt, der an seinem vordersten Ende einen das Halteelement bildenen Haltezapfen 46 trägt, der mit seinem Außengewinde in das Aufnahmegewinde 38 einschraubbar ist. Damit ist der Bolzen 44 koaxial zur Achse 28 in der Schleifspindel 16 angeordnet.In the grinding spindle 16 with the already known features, the adapter 10 according to the invention can now be used, which comprises a bolt 44 which carries at its foremost end a holding pin 46 forming the holding element, which can be screwed into the receiving thread 38 with its external thread. The bolt 44 is thus arranged coaxially to the axis 28 in the grinding spindle 16.

Der Bolzen 44 ist außerdem mit einem Bund 48 versehen, welcher eine auf der dem Haltezapfen 44 gegenüberliegenden Seite angeordnete und senkrecht zur Achse 28 der Schleifspindel 16 und damit auch des Bolzens 44 verlaufende Frontfläche 50 trägt, die als Anlagefläche für eine Trägerplatte 52 des Zusatzwerkzeugs 18 dient. Auf der dem Haltezapfen 46 gegenüberliegenden Seite des Bundes 48 erstreckt sich ferner ein zum Haltezapfen 46 koaxial angeordneter Befestigungszapfen 54 des Bolzens 44, welcher eine Befestigungsausnehmung 56 in der Trägerplatte 52 durchgreift und auf welchen eine Befestigungsmutter 58 aufschraubbar ist, mittels welcher die Trägerplatte 52 gegen die Frontfläche 50 des Bundes 48 verspannbar ist. Der Befestigungszapfen 54 und die Befestigungsmutter 58 bilden dabei gemeinsam eine Standardbefestigung für das Zusatzwerkzeug 18, dessen Trägerplatte 52 mit einer standartisierten Befestigungsausnehmung 56 versehen ist.The bolt 44 is also provided with a collar 48, one on the opposite of the retaining pin 44 Side arranged and perpendicular to the axis 28 of the grinding spindle 16 and thus also the bolt 44 extends front surface 50, which serves as a contact surface for a carrier plate 52 of the additional tool 18. On the side of the collar 48 opposite the holding pin 46, there also extends a fastening pin 54 of the bolt 44 which is arranged coaxially with the holding pin 46 and which passes through a fastening recess 56 in the carrier plate 52 and onto which a fastening nut 58 can be screwed, by means of which the carrier plate 52 can be screwed against the Front surface 50 of the federal government 48 is clamped. The fastening pin 54 and the fastening nut 58 together form a standard fastening for the additional tool 18, the support plate 52 of which is provided with a standardized fastening recess 56.

Auf der der Frontfläche 50 gegenüberliegenden Seite des Bundes 48 ist dieser mit einer zur Frontfläche 50 parallel verlaufenden Anlagefläche 60 versehen. Zwischen dieser Anlagefläche 60 und dem Haltezapfen 46 trägt der Bolzen 44 einen Gewindeabschnitt 62, welcher eine Gewindesteigung aufweist, die mit einer Gewindesteigung des Haltezapfens 46 identisch ist.On the side of the collar 48 opposite the front surface 50, the collar 48 is provided with a contact surface 60 running parallel to the front surface 50. Between this contact surface 60 and the holding pin 46, the bolt 44 carries a threaded section 62 which has a thread pitch which is identical to a thread pitch of the holding pin 46.

Dieser Gewindeabschnitt 62 durchsetzt eine Gewindebohrung 64 eines als Ganzes mit 66 bezeichneten Flansches im Bereich seines Flanschansatzes 68. An diesen Flanschansatz 68 ist ein sich von diesem radial nach außen erstreckender Flanschteller 70 angeformt, welcher so ausgebildet ist, daß er auf dem Gegenflansch 22 aufsitzen kann. Der Flanschansatz 68 ist seinerseits mit einem in den Innenmehrkantabschnitt 40 passenden Außenmehrkantabschnitt 72 versehen, so daß er in die zentrale Ausnehmung 24 der Hohlspindel 20 einführbar und in dieser drehfest fixiert ist.This threaded section 62 passes through a threaded bore 64 of a flange designated as a whole by 66 in the region of its flange extension 68. A flange plate 70, which extends radially outward from this flange and is formed in such a way that it can rest on the counter flange 22, is formed on this flange extension 68 . The flange shoulder 68 is in turn provided with an outer polygonal portion 72 which fits into the inner polygonal portion 40, so that it can be inserted into the central recess 24 of the hollow spindle 20 and is fixed in a rotationally fixed manner therein.

Durch Verdrehen des Bolzens 44 ist nun der Flansch 66 von einer Sicherungsstellung, in der dieser mit seinem Flanschteller 70 an der Anlagefläche 60 anliegt und außerdem mit seinem Flanschteller 70 auf dem Gegenflansch 22 aufsitzt, in eine Montagestellung verschiebbar, in welcher der Bund 48 nicht mehr mit der Anlagefläche 60 am Flanschteller 70 anliegt, sondern von diesem einen Abstand aufweist, der so groß ist, daß der Haltezapfen 46 nicht mehr in das Aufnahmegewinde 38 eingeschraubt ist, wie dies in der vorgenannten Sicherungsstellung der Fall war. Das heißt, der Bolzen 44 ist gegenüber dem Flansch 66 so weit verschiebbar, daß dessen Haltezapfen 46 in der Sicherungsstellung mit dem Aufnahmegewinde 38 voll in Eingriff ist, während in der Montagestellung der Haltezapfen 46 vollständig aus dem Aufnahmegewinde 38 herausgeschraubt ist. Das hat andererseits zur Folge, daß der Gewindeabschnitt 62 so bemessen sein muß, daß er sowohl in der Sicherungsstellung als auch in der Montagestellung noch mit der Gewindebohrung 64 in Eingriff ist, so daß der Flansch 66 mit der Gewindebohrung 64 ständig am Gewindeabschnitt 62 des Bolzens 44 geführt ist.By rotating the bolt 44, the flange 66 can now be moved from a secured position, in which it rests with its flange plate 70 on the contact surface 60 and also with its flange plate 70 on the counter flange 22, into an assembly position in which the collar 48 is no longer rests with the contact surface 60 on the flange plate 70, but is at a distance from it which is so large that the retaining pin 46 is no longer screwed into the receiving thread 38, as was the case in the aforementioned securing position. That is, the bolt 44 is so far displaceable relative to the flange 66 that its retaining pin 46 is fully engaged with the receiving thread 38 in the securing position, while in the mounting position the retaining pin 46 is completely unscrewed from the receiving thread 38. On the other hand, this has the consequence that the threaded section 62 must be dimensioned such that it is still in engagement with the threaded bore 64 both in the securing position and in the mounting position, so that the flange 66 with the threaded bore 64 constantly on the threaded section 62 of the bolt 44 is performed.

Beim Einsatz des erfindungsgemäßen ersten Ausführungsbeispiels des Adapters 10 wird nun dieser mit in Montagestellung stehendem Flansch 66 so in die Schleifspindel 16 eingeführt, daß der Außenmehrkantabschnitt 72 des Flanschansatzes 68 mit dem Innenmehrkantabschnitt 40 der zentralen Ausnehmung 24 der Hohlspindel 20 in Eingriff kommt und damit den Flansch 66 drehfest in der Hohlspindel 20 fixiert, wobei der Flansch 66 mit seinem Flanschteller 70 auf dem Gegenflansch 22 aufliegt. Durch Drehen des Bolzens 44 verschiebt sich dieser aufgrund des mit des Gewindebohrung 64 in Eingriff stehenden Gewindeabschnitts 62 mit seinem Haltezapfen 46 in Richtung der Zugspindel 26 und kommt dabei mit dem Aufnahmegewinde 38 in Eingriff. Durch die identische Steigung des Gewindes des Haltezapfens 46 und des Gewindeabschnitts 62 läßt sich der Bolzen 44 ohne eine zusätzliche Relativverschiebung zwischen dem Flansch 66 und der Zugspindel 26 mit dem Haltezapfen 46 in das Aufnahmegewinde 38 so lange einschrauben bis der Bund 48 mit der Anlagefläche 60 am Flanschteller 70 anliegt und der Flansch 66 somit in seiner Sicherungsstellung steht.When using the first embodiment of the adapter 10 according to the invention, this is now inserted into the grinding spindle 16 with the flange 66 in the mounting position such that the outer polygonal portion 72 of the flange attachment 68 comes into engagement with the inner polygonal portion 40 of the central recess 24 of the hollow spindle 20 and thus the flange 66 rotatably fixed in the hollow spindle 20, the flange 66 with its flange plate 70 rests on the counter flange 22. By turning the bolt 44, this shifts due to the threaded portion 62 engaging with the threaded bore 64 with its retaining pin 46 in the direction of the tension spindle 26 and thereby comes into engagement with the receiving thread 38. Due to the identical pitch of the thread of the holding pin 46 and the threaded portion 62, the bolt 44 can be screwed with the holding pin 46 into the receiving thread 38 without an additional relative displacement between the flange 66 and the pull spindle 26 until the collar 48 with the contact surface 60 on Flange plate 70 abuts and the flange 66 is thus in its securing position.

Eine spielfreie Befestigung des ersten Ausführungsbeispiels des erfindungsgemäßen Adapters 10 erfolgt nun dadurch, daß die Handbetätigungseinrichtung 32 von einerden Adapter nichtspannenden Stellung, in welcher die Zugspindel 26 durch die Handbetätigungseinrichtung 32 über das Druckstück 34 entgegen der Kraft der Druckfedern 30 in Richtung auf den Gegenflansch 22 verschoben ist, in eine den Adapter 10 spannende Stellung bewegt wird, in welcher diese das Druckstück 34 nicht mehr beaufschlagt und somit die Zugspindel 26 voll der Kraft der Druckfedern 30 ausgesetzt ist, die bestrebt sind diese in Richtung vom Gegenflansch 22 weg zu verschieben und damit den Bolzen 44 in gleicher Richtung zu verschieben, was bedeutet, daß der Flansch 66 mit dem Flanschteller 70 gegen den Gegenflansch 22 gespannt wird, so daß der Adapter 10 insgesamt spielfrei in der Schleifspindel 16 sitzt.A play-free attachment of the first embodiment of the adapter 10 according to the invention now takes place in that the manual actuating device 32 is moved from a position that does not tension the adapter, in which the pulling spindle 26 is displaced by the manual actuating device 32 via the pressure piece 34 against the force of the compression springs 30 in the direction of the counter flange 22 is moved into a position exciting the adapter 10, in which it no longer acts on the pressure piece 34 and thus the tension spindle 26 is fully exposed to the force of the compression springs 30, which strive to move them in the direction away from the counter flange 22 and thus the To move bolt 44 in the same direction, which means that the flange 66 is clamped with the flange plate 70 against the counter flange 22, so that the adapter 10 is seated in the grinding spindle 16 without play.

Bei einem zweiten, als Ganzes mit 80 bezeichneten Ausführungsbeispiel des erfindungsgemäßen Adapters sind diejenigen Teile, welche mit denen des ersten Ausführungsbeispiels des erfindungsgemäßen Adapters 10 identisch sind, mit denselben Bezugszeichen versehen, so daß bezüglich deren Beschreibung auf die Ausführungen zum ersten Ausführungsbeispiel verwiesen werden kann. Dieses zweite Ausführungsbeispiel 80 des erfindungsgemäßen Adapters soll ebenfalls dazu vorgesehen sein, in die Schleifspindel 16 wie das erste Ausführungsbeispiel 10 des erfindungsgemäßen Adapters eingesetzt zu werden. Ferner ist auch das Zusatzwerkzeug 18 mit derselben Befestigungsausnehmung 56 in seiner Trägerplatte 52 versehen.In a second embodiment of the adapter according to the invention, designated as a whole by 80, those parts which are identical to those of the first embodiment of the adapter 10 according to the invention are provided with the same reference numerals, so that reference can be made to the explanations for the description of the first embodiment. This second embodiment 80 of the adapter according to the invention is also intended to be used in the grinding spindle 16 like the first embodiment 10 of the adapter according to the invention. Furthermore, the additional tool 18 is also provided with the same fastening recess 56 in its carrier plate 52.

Im Gegensatz zum ersten Ausführungsbeispiel trägt dererfindungsgemäße Adapter 80 gemäß dem zweiten Ausführungsbeispiel anstelle des Gewindeabschnitts 62 einen Führungsabschnitt 82, welcher einen zylindrischen Außenmehrkant 84 aufweist, dessen Abflachungen 86 als Sekanten eines Kreisbogens angeordnet sind.In contrast to the first embodiment, the adapter 80 according to the invention carries according to the second Embodiment instead of the threaded portion 62, a guide portion 82 which has a cylindrical outer polygon 84, the flats 86 are arranged as secants of an arc.

Zur Aufnahme des Führungsabschnitts 82 mit dem Außenmehrkant 84 ist der Flanschansatz 68 mit einem Innenmehrkant 88 versehen. Der Innenmehrkant 88 ist vorzugsweise dabei relativ zum Außenmehrkantabschnitt 72 des Flanschansatzes 68 so orientiert, daß die Abflachungen 86 parallel zu den Abflachungen 42 verlaufen und damit der Innenmehrkant 88 einen Querschnitt aufweist, der eine Verkleinerung des Querschnitts des Innenmehrkantabschnitts 40 der Hohlspindel 20 darstellt. Somit liegt der Flanschansatz 68 in der Form eines Hohlzylinders zwischen dem Innenmehrkantabschnitt 40 der Hohlspindel 20 und dem Außenmehrkant 84 des Führungsabschnitts 82.To accommodate the guide section 82 with the outer polygon 84, the flange shoulder 68 is provided with an inner polygon 88. The inner polygon 88 is preferably oriented relative to the outer polygonal portion 72 of the flange shoulder 68 in such a way that the flats 86 run parallel to the flats 42 and thus the inner polygon 88 has a cross section which represents a reduction in the cross section of the inner polygonal portion 40 of the hollow spindle 20. The flange shoulder 68 in the form of a hollow cylinder thus lies between the inner polygonal section 40 of the hollow spindle 20 and the outer polygonal section 84 of the guide section 82.

Um den Flansch 66 sowohl in der Sicherungsstellung als auch der Montagestellung relativ zum Bolzen 44 fixieren zu können, ist der Führungsabschnitt 82 mit einer Ringnut 90 versehen, in welcher eine Federspange 92 liegt, die radial nach außen federnd mit ringförmigen Ausnehmungen 94 und 96 im Innenmehrkantabschnitt 40 in Eingriff bringbar ist, wobei durch Eingriff in die ringförmige Ausnehmung 94 eine Verrastung in der Sicherungsstellung und durch die ringförmige Ausnehmung 96 eine Verrastung in der Montagestellung erfolgt.In order to be able to fix the flange 66 relative to the bolt 44 both in the securing position and in the mounting position, the guide section 82 is provided with an annular groove 90 in which there is a spring clip 92 which resiliently radially outwards with annular recesses 94 and 96 in the internal polygonal section 40 can be brought into engagement, wherein engagement in the annular recess 94 results in a locking in the securing position and locking in the mounting position by the annular recess 96.

Die Trägerplatte 52 des Zusatzwerkzeugs 18 liegt jedoch bei diesem Adapter 80 nicht auf einem Bund auf, sondern direkt auf dem Flanschteller 70, der seinerseits wiederum am Gegenflansch 22 anliegt.With this adapter 80, however, the carrier plate 52 of the additional tool 18 does not rest on a collar, but rather directly on the flange plate 70, which in turn bears against the counter flange 22.

Die Montage des Zusatzwerkzeugs 18 mit dem Adapter 80 erfolgt dadurch, daß bei in Montagestellung verrastetem Flansch 66 der Bolzen 44 mitdem Haltezapfen 46 in das Aufnahmegewinde 38 eingeschraubt wird. Auch bei vollständig eingeschraubtem Haltezapfen 46 ist der in Montagestellung stehende Flansch 66 mit seinem Flanschansatz 68 nicht mit dem Innenmehrkant 40 der Hohlspindel 20 in Eingriff. Erst durch Verschieben des Flansches 66 bei in das Aufnahmegewinde 38 eingeschraubtem Haltezapfen 46 in Richtung des Gegenflansches 22 kommt der Außenmehrkantabschnitt 72 des Flanschansatzes 68 mit dem Innenmehrkantabschnitt 40 der Hohlspindel 20 in Eingriff. Dieses Verschieben ist dadurch möglich, daß der Flanschansatz 68 auf den Führungsabschnitt 82 des Bolzens 44 gleiten kann. Sobald der Außenmehrkantabschnitt 42 in den Innenmehrkantabschnitt 40 eingreift, ist somit der Bolzen 44 in der Hohlspindel 20 und somit auch in der Drehspindel 16 unverdrehbarfixiert. Der über den Flanschteller 70 vorgesehene Befestigungszapfen 44 kann somit durch die Befestigungsausnehmung 56 hindurchgeführt werden, so daß die Befestigungsmutter 58 die Trägerplatte 52 gegen den Flanschteller 70 des Flansches 66 anlegt. Ein Festdrehen der Befestigungsmutter 58 mittels eines Werkzeugs ist nicht erforderlich. Es genügt ein leichtes Andrehen.The assembly of the additional tool 18 with the adapter 80 is carried out by screwing the bolt 44 with the retaining pin 46 into the receiving thread 38 when the flange 66 is locked in the assembly position. Even when the retaining pin 46 is completely screwed in, the flange 66 in the mounting position is not in engagement with the inner polygon 40 of the hollow spindle 20 with its flange extension 68. The outer polygonal section 72 of the flange attachment 68 engages with the inner polygonal section 40 of the hollow spindle 20 only by moving the flange 66 with the holding pin 46 screwed into the receiving thread 38 in the direction of the counter flange 22. This displacement is possible because the flange extension 68 can slide on the guide section 82 of the bolt 44. As soon as the outer polygonal section 42 engages in the inner polygonal section 40, the bolt 44 is thus non-rotatably fixed in the hollow spindle 20 and thus also in the rotating spindle 16. The fastening pin 44 provided over the flange plate 70 can thus be passed through the fastening recess 56, so that the fastening nut 58 bears the carrier plate 52 against the flange plate 70 of the flange 66. Tightening the fastening nut 58 using a tool is not necessary. A gentle turn is enough.

Dadurch, daß beim Einsetzen des Adapters 80 die Zugspindel 26 durch die Handbetätigungseinrichtung 32 in ihrer das Werkzeug nicht spannenden Stellung gehalten wird, kann durch Überführen der Handbetägigungseinrichtung 32 in die das Werkzeug spannende Stellung die Zugspindel 26 den Bolzen 44 in Richtung vom Gegenflansch 22 weg beaufschlagen, was zur Folge hat, daß der nach wie vor in dem Flansch 66 in axialer Richtung verschiebliche Bolzen 44 sich geringfügig mit der Zugspindel 26 bewegt und damit der Befestigungszapfen die Befestigungsmutter gegen die Trägerplatte 52 des Zusatzwerkzeugs 18 verspannt, welche ihrerseits wieder gegen den Flanschteller 70 gespannt wird, der seinerseits am Gegenflansch 22 der Hohlspindel 20 anliegt. Mitdem Adapter 80 istsomit beim Überführen der Zugspindel 26 von ihrer das Werkzeug nichtspannenden Stellung in ihre das Werkzeug spannende Stellung sowohl ein spannendes spielfreies Festlegen des Adapters 80 als auch ein Frieren der Standardbefestigung,umfassen den Befestigungszapfen 54 und die Befestigungsmutter 58,möglich.Characterized in that when the adapter 80 is inserted, the pull spindle 26 is held in its position not exciting the tool by the manual actuation device 32, by moving the manual actuation device 32 into the position exciting the tool, the pull spindle 26 can act on the bolt 44 in the direction away from the counter flange 22 , which has the consequence that the bolt 44, which is still displaceable in the axial direction in the flange 66, moves slightly with the tension spindle 26 and thus the fastening pin braces the fastening nut against the carrier plate 52 of the additional tool 18, which in turn again presses against the flange plate 70 is tensioned, which in turn rests on the counter flange 22 of the hollow spindle 20. With the adapter 80, when the pulling spindle 26 is transferred from its position that is not tensioning the tool into its position that is tensioning the tool, both an exciting play-free fixing of the adapter 80 and a freezing of the standard fastening, including the fastening pin 54 and the fastening nut 58, are possible.

Dies ist beim ersten Ausführungsbeispiel 10 des erfindungsgemäßen Adapters nicht der Fall, da durch Anlegen der Trägerplatte 52 an die Frontfläche 50 des Bundes 48 die Befestigung des Zusatzwerkzeugs 18 unabhängig von dem Spannen des Adapters durch die Zugspindel 26 ist.This is not the case with the first exemplary embodiment 10 of the adapter according to the invention, since by attaching the carrier plate 52 to the front surface 50 of the collar 48, the attachment of the additional tool 18 is independent of the tensioning of the adapter by the tension spindle 26.

Claims (13)

  1. Grinding machine with a grinding spindle (16), which has a hollow spindle with a counterflange (22), firmly connected to the latter, and a positive-locking piece (40), and has a draw spindle (26) which can be displaced in the axial direction in the hollow spindle, the said draw spindle comprising a receptacle (38) for a manually fixable and releasable holding element (46), with a bolt (44), which at one end bears the holding element (46) and at the opposite end bears a flange (66), which can be displaced in the axial direction of the bolt (44) with respect to the latter from an assembly position into a securing position and vice versa, the flange (66) having a positive-locking counterpiece (68) which can be brought into engagement with the positive-locking piece (40), and the bolt (44) which is inserted into the grinding spindle (16) being fixed on the grinding spindle (16) unrotatably in the direction of a further fixing movement of the holding element (46) in the receptacle (38) by the flange (66) located in the securing position, characterized in that the bolt (44) bears at its end opposite the holding element (46) an adaptor (10, 80) with a standard fastening (54, 58), in that the flange (66) has a threaded bore (64), through which a threaded section (62) of the bolt (44) is passed, and in that the bolt (44) bears a collar (48), which in the securing position bears against the flange (66) and prevents further turning of the bolt (44).
  2. Grinding machine according to Claim 1, characterized in that the threaded section (62) has a thread pitch which corresponds to a thread pitch of the screw connection formed by receptacle (38) and holding element (46).
  3. Grinding machine with a grinding spindle (16), which has a hollow spindle with a counterflange (22), firmly connected to the latter, and a positive-locking piece (40), and has a draw spindle (26) which can be displaced in the axial direction in the hollow spindle, the said draw spindle comprising a receptacle (38) for a manually fixable and releasable holding element (46), with a bolt (44), which at one end bears the holding element (46) and at an opposite end bears a flange (66), which can be displaced in the axial direction of the bolt (44) with respect to the latter from an assembly position into a securing position and vice versa, the flange (66) having a positive-locking counterpiece (68) which can be brought into engagement with the positive-locking piece (40), and the bolt (44) which is inserted into the grinding spindle (16) being fixed on the grinding spindle (16) unrotatably in the direction of a further fixing movement of the holding element (46) in the receptacle (38) by the flange (66) located in the securing position, characterized in that the bolt (44) bears at its end opposite the holding element (46) an adaptor (10, 80) with a standard fastening (54, 58), and in that the flange (66) is guided displaceably in the axial direction of the bolt (44) and unrotatably on the bolt (44) by positive-locking elements (84, 88).
  4. Grinding machine according to Claim 3, characterized in that the positive-locking elements are designed as a polygonal crown (84) provided on the bolt (44) and as a polygonal socket (88) provided on the flange.
  5. Grinding machine with an adapter according to Claim 3 or 4, characterized in that the flange (66) is guided on the bolt (44) by the positive-locking elements (84, 88).
  6. Grinding machine with an adapter according to one of Claims 3 to 5, characterized in that the flange (66) can be fixed on the bolt (44) in the assembly position by catching elements (92, 96).
  7. Grinding machine with an adapter according to one of Claims 3 to 6, characterized in that the flange (66) can be fixed on the bolt (44) in the securing position by catching elements (92, 94).
  8. Grinding machine with an adapter according to one of Claims 3 to 7, characterized in that the positive-locking elements (84, 88) are adapted in their cross-sectional shape to the positive-locking counterpiece (72).
  9. Grinding machine with an adapter according to Claim 8, characterized in that the positive-locking elements (84, 88) have a cross-sectional shape which represents a reduction of the cross-sectional shape of the positive-locking counterpiece (72).
  10. Grinding machine according to one of the preceding claims, characterized in that the receptacle (38) and the holding element (46) form a screw connection.
  11. Grinding machine according to one of the preceding claims, characterized in that the receptacle is a receiving thread (38) and the holding element is a holding pin (46) which can be screwed into the receiving thread (38).
  12. Grinding machine according to one of the preceding claims, characterized in that the positive-locking counterpiece is a flange attachment which has a polygonal crown at section (72) and fits into a polygonal socket section (40) of the positive-locking piece.
  13. Grinding machine according to one of the preceding claims, characterized in that the standard fastening is a screw connection (54, 58) for the additional tool (18) provided with a fastening clearance (56).
EP19900101008 1989-02-01 1990-01-18 Grinding machine with an adaptator for the clamping of a supplementary tool Expired - Lifetime EP0380974B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893902874 DE3902874A1 (en) 1989-02-01 1989-02-01 ADAPTER FOR ATTACHING AN ADDITIONAL TOOL
DE3902874 1989-02-01

Publications (4)

Publication Number Publication Date
EP0380974A2 EP0380974A2 (en) 1990-08-08
EP0380974A3 EP0380974A3 (en) 1990-12-27
EP0380974B1 EP0380974B1 (en) 1993-12-29
EP0380974B2 true EP0380974B2 (en) 1997-04-02

Family

ID=6373172

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900101008 Expired - Lifetime EP0380974B2 (en) 1989-02-01 1990-01-18 Grinding machine with an adaptator for the clamping of a supplementary tool

Country Status (3)

Country Link
US (1) US5058909A (en)
EP (1) EP0380974B2 (en)
DE (2) DE3902874A1 (en)

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Also Published As

Publication number Publication date
EP0380974B1 (en) 1993-12-29
DE3902874C2 (en) 1991-01-10
DE59003986D1 (en) 1994-02-10
EP0380974A2 (en) 1990-08-08
US5058909A (en) 1991-10-22
DE3902874A1 (en) 1990-08-09
EP0380974A3 (en) 1990-12-27

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