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EP0962283B1 - Hand-held power tool - Google Patents

Hand-held power tool Download PDF

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Publication number
EP0962283B1
EP0962283B1 EP99106257A EP99106257A EP0962283B1 EP 0962283 B1 EP0962283 B1 EP 0962283B1 EP 99106257 A EP99106257 A EP 99106257A EP 99106257 A EP99106257 A EP 99106257A EP 0962283 B1 EP0962283 B1 EP 0962283B1
Authority
EP
European Patent Office
Prior art keywords
tool
clamping
hand
strutting
mounting flange
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99106257A
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German (de)
French (fr)
Other versions
EP0962283A1 (en
Inventor
Bert G. Wurst
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.)
C&E Fein GmbH and Co
Original Assignee
C&E Fein GmbH and Co
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 C&E Fein GmbH and Co filed Critical C&E Fein GmbH and Co
Publication of EP0962283A1 publication Critical patent/EP0962283A1/en
Application granted granted Critical
Publication of EP0962283B1 publication Critical patent/EP0962283B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/04Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00Means for securing grinding wheels on rotary arbors
    • B24B45/006Quick mount and release means for disc-like wheels, e.g. on power tools

Definitions

  • the invention relates to a power-driven hand tool according to the The preamble of claim 1 or 6.
  • Such a power-driven hand tool is from the EP-B-0 244 465 known.
  • a grinding tool is used an oscillation drive with high frequency and small swivel angle in an oscillating movement around the longitudinal axis of the tool.
  • the attachment of the Tool on the work spindle usually by means of a central Fastening screw or by means of a central Mounting flange.
  • US-A-3 376 675 is a rotatingly driven one Hand tool known that has a grinding head, on the Underside of sandpaper using a conical mounting flange can be spanned by a spring-loaded The tension anchor is applied in such a way that the sandpaper is securely clamped.
  • the well-known hand tool is only for a rotating drive suitable and has the disadvantage that the clamping and Loosening the sandpaper is relatively expensive and that Clamping device is relatively complicated and therefore expensive to build is.
  • an angle grinder is known from JP-A-49-6431, in which the grinding wheel with the help of a flange-like elastic Clamping element in a central fastening opening the grinding wheel engages with the interposition of a Spreading element with a central, axially displaceable Mandrel is connected to the work spindle can be clamped.
  • Such a clamping device is in particular for production particularly high clamping forces, such as those found in high-speed grinding wheels are necessary.
  • the jig is therefore designed and made correspondingly complex no easy interchangeability of the tool to be clamped, like an oscillating tool is required.
  • the object of the invention is therefore based, an improved, oscillating powered hand tool to create a manual tool change is possible.
  • the structure and handling should be as possible be kept simple.
  • tension anchor and expansion element are preferred or adapter sleeve and work spindle matched to each other, that in normal operation even without a large one Clamping force a sufficiently secure connection to the drive of the Tool through the work spindle.
  • FIG. 1 shows a power-driven hand tool according to the invention designated overall by the number 10.
  • a housing 29 is purely schematic indicated, in which an electric motor 31 is received, the a work spindle via an oscillation drive 30 of a known type 11 drives by the oscillation drive 30 with high frequency in the order of about 10,000 and 25,000 oscillations per minute and with a small swivel angle approximately in the range between 0.5 and 7 ° around the longitudinal axis 32 is driven oscillating.
  • outer end 12 of the work spindle is a tool designated overall with the number 22 in the following attached described in more detail. With the tool it is a triangular grinding disc with convex Outer edges, as known from EP-B-0 244 465 is.
  • the tool 22 thus comprises a support plate 23 which by a central fastening opening 27 is penetrated.
  • a support plate On the support plate is a relatively hard foam Support body 24 added, on the underside of a Velcro adhesive material 25 is provided.
  • a Velcro adhesive material 25 On the Velcro adhesive material 25 can a grinding or polishing element 26 by means of the Velcro adhesive material be attached in a known manner.
  • Below the fastening opening 27 is inside the support body 24 a recess 28 is provided which accommodates a mounting flange 15 allowed.
  • the mounting flange 15 is with a cylindrical tension anchor 17 rigidly connected to the the mounting flange 15 facing away from a conical end Section 18 is provided.
  • a spreading element 19 coaxially penetrates that in the area of conical section 18 of the tension anchor 17 one on the conical Section of the slope after the adjusted expansion cone 20 having.
  • an intermediate flange 16 is molded onto the expansion element 19, the support plate 23 against the holding portion 14 of the work spindle 11 acted upon.
  • a compression spring 21 provided through which the conical section 18 of the tension anchor 17 is applied against the expansion cone 20.
  • tension anchor 17, expansion element 19 and the inner surface of the work spindle designed as a hollow spindle 11 are now coordinated so that the spreading, the expansion element 19 through the conical section 18th experienced, sufficient to have an adequate, force-locking connection to produce between work spindle 11 and tool 22.
  • there can also be a positive connection between Work spindle and tool may be provided.
  • the attachment of the tool 22 takes place in the opposite direction.
  • the tension anchor 17 is together with the Spreading element 19 through the fastening opening 27 of the tool 22 inserted into the work spindle 11 and against the action of the compression spring 21 pressed in the direction of the arrow 34, until the intermediate flange in the recess 28 from the inside abuts the support plate 23 and finally under spring tension is held so that the tool 22 against the Holding section 14 of the work spindle 11 is clamped.
  • a piece of sandpaper 26 by means of the Velcro adhesive material 25 are attached to the surface of the support body 24.
  • a positive connection between the two e.g. be provided as profiling or corrugation 33, as indicated in Fig. 2.
  • FIG. 3 A variant of the embodiment according to FIG. 1 is shown in FIG. 3 and designated overall by the number 40.
  • the hand tool 40 has one not shown in FIG Has oscillating driven work spindle 41, having a first, outer end 42 on which a holding section 44 is in the form of a flange, and with a second, end 43 opposite end 43.
  • a total Tool designated with the number 52 which in turn as Grinding tool according to that previously described with reference to FIG. 1 Execution can be formed with its support plate 53 on the holding section 44 by means of a fastening flange 45 held with a rigid anchor 47 held in a spreading element 49 under the tension of a spring 51 is.
  • the tension anchor 47 has on its the mounting flange 45 opposite end a conical section 48 on, which is followed by an extension 54 by a Pressure piece 46 is completed.
  • the expansion element 49, the tension anchor 47 is penetrated, points in the region of the conical Section 48 a correspondingly inclined expansion cone 50 on.
  • a spring 51 Between the end face of the expansion element 49 and the Pressure piece 46 is held a spring 51 through which the Tension anchor 47 with its conical section 48 against the Expansion cone 50 of the expansion element is applied.
  • the Spreading element 49 is spread slightly under the action of spring 51, so that the tension anchor 47 frictionally in the work spindle 41 is included.
  • the tool is 52 frictionally between the mounting flange 45 and the holding portion 44 clamped.
  • the tension anchor 47 can be used for the purpose of achieving a better one Preload force can also be hollow and in the area of the conical Section 48 may be slotted.
  • an actuating element 55 in the form of a foldable bracket provided on which the entire tensioning unit can be pulled out. If the work spindle 41 its end facing away from the tool 52 is accessible can alternatively be the pressure piece 46 against the action the spring 51 are pressed so that the spread of the Expansion element 49 is lifted and the tension anchor 47 together Spreading element 49 are pulled out of the work spindle 41 can.
  • FIG. 4 Another exemplary embodiment of the invention is shown in FIG. 4 designated overall by the number 60.
  • a work spindle 61 designed as a hollow spindle provided in a known manner by a not shown Oscillation drive is driven.
  • an adapter sleeve 69 is received on the tool 72 facing end is spread out conically and with a conical section 70 on a conical inner surface 76 of the work spindle 61 abuts in this area.
  • a mounting flange 64 molded by means of which the tool 72 against a holding section 64 in the form of a flange at the first, outer end 62 the work spindle 61 can be clamped.
  • a clamping anchor 67 is received within the clamping sleeve 69, that at its outer, tool-side end by a clamping cone 68 is completed, the slope of the conical section 70 of the adapter sleeve 69 is adapted.
  • the adapter sleeve 69 has a shoulder 79a approximately in the middle of its longitudinal extent on which a compression spring 71 rests, the other End engages a shoulder 79b of the tension anchor 67 to this towards the second, first end 62 of the work spindle 61 act opposite end.
  • the tension anchor 67 can therefore include the tensioning sleeve 69 through the fastening opening 77 of the tool 72 into the Work spindle 61 inserted and pressed until they under spring tension in the work spindle 61 frictionally is held so that the tool 72 with its support plate 73rd through the mounting flange 65 securely against the holding portion 64 is braced.
  • the tension anchor 67 is on its opposite the tool 72 End extended by a pressure piece 66 that outwards protrudes from the housing 79.
  • the mounting flange 65 be that this when moving the tension cone 68 so far retracts that the mounting flange 65 through the mounting opening 77 can be pulled.
  • the tool 72 can in turn, as previously based on the Fig. 1 shown on the underside of the support plate 73 with be provided a support body 74 on which a Velcro adhesive material intended to hold an abrasive or polishing agent is.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Description

Die Erfindung betrifft ein kraftgetriebenes Handwerkzeug gemäß dem Oberbegriff des Anspruchs 1 oder 6.The invention relates to a power-driven hand tool according to the The preamble of claim 1 or 6.

Ein derartiges kraftgetriebenes Handwerkzeug ist aus der EP-B-0 244 465 bekannt. Dabei wird ein Schleifwerkzeug mittels eines Oszillationsantriebes mit hoher Frequenz und kleinem Verschwenkwinkel in eine oszillierende Bewegung um die Längsachse des Werkzeugs versetzt. Hierbei erfolgt die Befestigung des Werkzeugs an der Arbeitsspindel in der Regel mittels einer zentralen Befestigungsschraube oder mittels eines zentralen Befestigungsflansches.Such a power-driven hand tool is from the EP-B-0 244 465 known. A grinding tool is used an oscillation drive with high frequency and small swivel angle in an oscillating movement around the longitudinal axis of the tool. The attachment of the Tool on the work spindle usually by means of a central Fastening screw or by means of a central Mounting flange.

Derartige Schleifwerkzeuge, die in der Regel mit einer dreieckförmigen Schleiffläche mit konvexen Außenkanten ausgestattet sind, haben sich in den letzten Jahren mehr und mehr am Markt durchgesetzt und sind unter der Bezeichnung "Dreiecksschleifer" bekannt.Such grinding tools, usually with a triangular shape Grinding surface equipped with convex outer edges have become more and more on the market in recent years enforced and are known as "triangular grinders" known.

Als nachteilig hat es sich hierbei herausgestellt, daß das Schleifwerkzeug nur unter Zuhilfenahme eines Hilfswerkzeuges, wie etwa eines Schraubenschlüssels oder eines Schraubendrehers, an der Arbeitsspindel befestigt bzw. von dieser gelöst werden kann.As a disadvantage, it has been found that the Grinding tool only with the help of an auxiliary tool, like a wrench or screwdriver, attached to or detached from the work spindle can.

Ferner ist aus der US-A-3 376 675 ein rotierend angetriebenes Handwerkzeug bekannt, das einen Schleifkopf aufweist, an dessen Unterseite ein Schleifpapier mittels eines konischen Befestigungsflansches aufgespannt werden kann, der durch einen federbelasteten Spannanker derart beaufschlagt ist, daß das Schleifpapier sicher eingespannt ist.Furthermore, from US-A-3 376 675 is a rotatingly driven one Hand tool known that has a grinding head, on the Underside of sandpaper using a conical mounting flange can be spanned by a spring-loaded The tension anchor is applied in such a way that the sandpaper is securely clamped.

Das bekannte Handwerkzeug ist nur für einen rotierenden Antrieb geeignet und weist den Nachteil auf, daß das Einspannen und Lösen des Schleifpapiers relativ aufwendig ist und daß die Spanneinrichtung relativ kompliziert und damit teuer aufgebaut ist. The well-known hand tool is only for a rotating drive suitable and has the disadvantage that the clamping and Loosening the sandpaper is relatively expensive and that Clamping device is relatively complicated and therefore expensive to build is.

Ferner ist aus der JP-A-49-6431 ein Winkelschleifer bekannt, bei dem die Schleifscheibe mit Hilfe eines flanschartigen elastischen Spannelementes, das in eine zentrale Befestigungsöffnung der Schleifscheibe eingreift, unter Zwischenlage eines Spreizelementes, das mit einem zentralen, axial verschieblichen Dorn verbunden ist, an der Arbeitsspindel einspannbar ist.Furthermore, an angle grinder is known from JP-A-49-6431, in which the grinding wheel with the help of a flange-like elastic Clamping element in a central fastening opening the grinding wheel engages with the interposition of a Spreading element with a central, axially displaceable Mandrel is connected to the work spindle can be clamped.

Auch hierbei sind Aufbau und Arbeitsweise der Spanneinrichtung relativ kompliziert. Here too, the structure and mode of operation of the tensioning device relatively complicated.

Aus der DE-A-195 26 755 ist ferner eine Spannvorrichtung für eine rotierende Schleifscheibe bekannt, bei der an der rotierend angetriebenen Arbeitsspindel ein Trägerteil mit einem Axialfortsatz vorgesehen ist, der als elastisch aufweitbare Spannhülse ausgebildet ist. Die Schleifscheibe wird hierbei mit ihrer Befestigungsöffnung auf die Spannhülse aufgesetzt und durch einen von außen aufgespannten Flansch gespannt, der einen in die Spannhülse hineinreichenden Fortsatz aufweist, mittels dem die Spannhülse nach außen aufgeweitet wird, um die Schleifscheibe unmittelbar an ihrer Befestigungsöffnung zu spannen.From DE-A-195 26 755 is also a tensioning device for a rotating grinding wheel is known, in which the rotating driven work spindle a carrier part with a Axial extension is provided, which is elastically expandable Clamping sleeve is formed. The grinding wheel is included their mounting opening placed on the adapter sleeve and clamped by an externally clamped flange, the one has extension extending into the clamping sleeve, by means of which the adapter sleeve is widened outwards around the grinding wheel to clamp directly at their mounting opening.

Eine derartige Spannvorrichtung ist insbesondere zur Erzeugung besonders hoher Spannkräfte geeignet, wie sie etwa bei Hochgeschwindigkeits-Schleifscheiben notwendig sind. Die Spannvorrichtung ist daher entsprechend aufwendig gestaltet und ermöglicht keine leichte Austauschbarkeit des zu spannenden Werkzeugs, wie sie bei einem oszillierend angetriebenen Werkzeug gefordert wird.Such a clamping device is in particular for production particularly high clamping forces, such as those found in high-speed grinding wheels are necessary. The jig is therefore designed and made correspondingly complex no easy interchangeability of the tool to be clamped, like an oscillating tool is required.

Vor diesem Hintergrund liegt der Erfindung somit die Aufgabe zugrunde, ein verbessertes, oszillierend angetriebenes Handwerkzeug zu schaffen, bei dem ein manueller Wechsel des Werkzeugs ermöglicht ist. Dabei sollen Aufbau und Handhabung möglichst einfach gehalten sein. Against this background, the object of the invention is therefore based, an improved, oscillating powered hand tool to create a manual tool change is possible. The structure and handling should be as possible be kept simple.

Diese Aufgabe wird durch ein kraftgetriebenes Handwerkzeug mit den Merkmalen des Anspruchs 1 oder alternativ mit den Merkmalen des Anspruchs 6 gelöst. In beiden Fällen wird eine besonders einfache Befestigung des Werkzeugs an der als Hohlspindel ausgebildeten Arbeitsspindel ermöglicht. Hierzu muss lediglich eine Spanneinheit bestehend aus einem Spreizelement, das mit einem Spannanker zusammenwirkt, oder bestehend aus einer Spannhülse, die von einem Spannanker durchsetzt wird, durch eine Befestigungsöffnung des Werkzeuges hindurch in die Öffnung der hohlen Arbeitsspindel hineingesteckt werden. Durch eine Relativverschiebung zwischen Spannanker und Spreizelement bzw. zwischen Spannanker und Spannhülse wird eine kraftschlüssige Verbindung zur Arbeitsspindel erreicht, die von der Außenseite her ohne Zuhilfenahme externer Werkzeuge wieder gelöst werden kann.This task is accomplished using a power-driven hand tool the features of claim 1 or alternatively with the features of claim 6 solved. In both cases, one becomes special simple attachment of the tool to the hollow spindle Working spindle enables. All you have to do is a clamping unit consisting of an expansion element that with a tension anchor cooperates, or consisting of a tension sleeve, which is penetrated by a tension anchor, by a Attachment opening of the tool into the opening of the hollow work spindle. Through a relative shift between tension anchor and expansion element or between the tension anchor and the tension sleeve is a non-positive Connection to the work spindle reached from the outside can be solved without the help of external tools can.

Dabei sind vorzugsweise die Dimensionen von Spannanker, Spreizelement bzw. Spannhülse und Arbeitsspindel so aufeinander abgestimmt, dass sich im normalen Betrieb auch ohne eine große Spannkraft eine ausreichend sichere Verbindung zum Antrieb des Werkzeugs durch die Arbeitsspindel ergibt.The dimensions of the tension anchor and expansion element are preferred or adapter sleeve and work spindle matched to each other, that in normal operation even without a large one Clamping force a sufficiently secure connection to the drive of the Tool through the work spindle.

Vorteilhafte Weiterbildungen der Erfindung sind in den abhängigen Ansprüchen unter Schutz gestellt. Advantageous developments of the invention are in the dependent Claims placed under protection.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele unter Bezugnahme auf die Zeichnung. Es zeigen:

Fig. 1
ein erstes Ausführungsbeispiel der Erfindung in geschnittener, stark vereinfachter Ausführung;
Fig. 2
einen Schnitt längs der Linie II-II gemäß Fig. 1, auf dem lediglich Arbeitsspindel, Spannelement und Spannanker dargestellt sind;
Fig. 3
eine zweite Alternative der Erfindung in geschnittener, stark vereinfachter Darstellung;
Fig. 4
eine weitere Variante der Erfindung in stark vereinfachter, geschnittener Darstellung;
Fig. 5
einen vergrößerten Ausschnitt aus Fig. 4 im Bereich des Befestigungsflansches.
Further features and advantages of the invention result from the following description of preferred exemplary embodiments with reference to the drawing. Show it:
Fig. 1
a first embodiment of the invention in a cut, highly simplified version;
Fig. 2
a section along the line II-II of Figure 1, on which only the work spindle, clamping element and clamping anchor are shown.
Fig. 3
a second alternative of the invention in a sectional, highly simplified representation;
Fig. 4
a further variant of the invention in a greatly simplified, sectional representation;
Fig. 5
an enlarged section of FIG. 4 in the region of the mounting flange.

In Fig. 1 ist ein erfindungsgemäßes kraftgetriebenes Handwerkzeug insgesamt mit der Ziffer 10 bezeichnet.1 shows a power-driven hand tool according to the invention designated overall by the number 10.

In der Zeichnung ist lediglich rein schematisch ein Gehäuse 29 angedeutet, in dem ein Elektromotor 31 aufgenommen ist, der über einen Oszillationsantrieb 30 bekannter Bauart eine Arbeitsspindel 11 antreibt, die von dem Oszillationsantrieb 30 mit hoher Frequenz in der Größenordnung zwischen etwa 10.000 und 25.000 Oszillationen pro Minute und mit geringem Verschwenkwinkel etwa im Bereich zwischen 0,5 und 7° um die Längsachse 32 oszillierend angetrieben wird.In the drawing, a housing 29 is purely schematic indicated, in which an electric motor 31 is received, the a work spindle via an oscillation drive 30 of a known type 11 drives by the oscillation drive 30 with high frequency in the order of about 10,000 and 25,000 oscillations per minute and with a small swivel angle approximately in the range between 0.5 and 7 ° around the longitudinal axis 32 is driven oscillating.

An einem ersten, äußeren Ende 12 der Arbeitsspindel ist ein insgesamt mit der Ziffer 22 bezeichnetes Werkzeug in nachfolgend noch näher beschriebener Weise befestigt. Bei dem Werkzeug handelt es sich um einen dreieckförmigen Schleifteller mit konvexen Außenkanten, derart, wie er aus der EP-B-0 244 465 bekannt ist.At a first, outer end 12 of the work spindle is a tool designated overall with the number 22 in the following attached described in more detail. With the tool it is a triangular grinding disc with convex Outer edges, as known from EP-B-0 244 465 is.

Das Werkzeug 22 umfaßt somit eine Tragplatte 23, die von einer zentralen Befestigungsöffnung 27 durchsetzt ist. An der Tragplatte ist ein aus einem relativ harten Schaumstoff bestehender Tragkörper 24 aufgenommen, an dessen Unterseite ein Klettenhaftmaterial 25 vorgesehen ist. Auf dem Klettenhaftmaterial 25 kann ein Schleif- oder Polierelement 26 mittels des Klettenhaftmaterials in bekannter Weise befestigt werden. Unterhalb der Befestigungsöffnung 27 ist innerhalb des Tragkörpers 24 eine Ausnehmung 28 vorgesehen, die die Aufnahme eines Befestigungsflansches 15 erlaubt. Der Befestigungsflansch 15 ist mit einem zylinderförmigen Spannanker 17 starr verbunden, an dessen dem Befestigungsflansch 15 abgewandten Ende ein konischer Abschnitt 18 vorgesehen ist. Von dem Spannanker 17 ist ein Spreizelement 19 koaxial durchsetzt, das im Bereich des konischen Abschnittes 18 des Spannankers 17 einen an den konischen Abschnitt der Steigung nach angepaßten Spreizkonus 20 aufweist. An seinem dem Befestigungsflansch 15 zugewandten Ende ist an das Spreizelement 19 ein Zwischenflansch 16 angeformt, der die Tragplatte 23 gegen den Halteabschnitt 14 der Arbeitsspindel 11 beaufschlagt. Hierzu ist zwischen dem Zwischenflansch 16 und dem Befestigungsflansch 15 eine Druckfeder 21 vorgesehen, durch die der konische Abschnitt 18 des Spannankers 17 gegen den Spreizkonus 20 beaufschlagt ist.The tool 22 thus comprises a support plate 23 which by a central fastening opening 27 is penetrated. On the support plate is a relatively hard foam Support body 24 added, on the underside of a Velcro adhesive material 25 is provided. On the Velcro adhesive material 25 can a grinding or polishing element 26 by means of the Velcro adhesive material be attached in a known manner. Below the fastening opening 27 is inside the support body 24 a recess 28 is provided which accommodates a mounting flange 15 allowed. The mounting flange 15 is with a cylindrical tension anchor 17 rigidly connected to the the mounting flange 15 facing away from a conical end Section 18 is provided. Of the tension anchor 17 is a spreading element 19 coaxially penetrates that in the area of conical section 18 of the tension anchor 17 one on the conical Section of the slope after the adjusted expansion cone 20 having. At its end facing the mounting flange 15 an intermediate flange 16 is molded onto the expansion element 19, the support plate 23 against the holding portion 14 of the work spindle 11 acted upon. For this is between the intermediate flange 16 and the mounting flange 15 a compression spring 21 provided through which the conical section 18 of the tension anchor 17 is applied against the expansion cone 20.

Die Dimensionierungen von Spannanker 17, Spreizelement 19 und der Innenfläche der als Hohlspindel ausgebildeten Arbeitsspindel 11 sind nun so aufeinander abgestimmt, daß die Aufspreizung, die das Spreizelement 19 durch den konischen Abschnitt 18 erfährt, ausreicht, um eine ausreichende, kraftschlüssige Verbindung zwischen Arbeitsspindel 11 und dem Werkzeug 22 herzustellen. Daneben kann auch eine formschlüssige Verbindung zwischen Arbeitsspindel und Werkzeug vorgesehen sein.The dimensions of tension anchor 17, expansion element 19 and the inner surface of the work spindle designed as a hollow spindle 11 are now coordinated so that the spreading, the expansion element 19 through the conical section 18th experienced, sufficient to have an adequate, force-locking connection to produce between work spindle 11 and tool 22. In addition, there can also be a positive connection between Work spindle and tool may be provided.

Soll das Werkzeug 22 ausgewechselt werden, so muß lediglich das Werkzeug 22 in Richtung des Pfeils 35 gegen die Wirkung der Druckfeder 21 nach außen gezogen werden. Als Folge davon wird das Spreizelement 19 nicht mehr so stark gespreizt, so daß der Spannanker 17 gemeinsam mit dem Spreizelement 19 aus der Arbeitsspindel 11 herausgezogen werden kann und das Werkzeug 22 somit abgenommen werden kann.If the tool 22 is to be replaced, then only that Tool 22 in the direction of arrow 35 against the action of Compression spring 21 can be pulled outwards. As a result of this the spreading element 19 is no longer spread so much that the Tension anchor 17 together with the expansion element 19 from the work spindle 11 can be pulled out and the tool 22nd can thus be removed.

Die Befestigung des Werkzeugs 22 erfolgt in umgekehrter Richtung. Hierzu wird also der Spannanker 17 gemeinsam mit dem Spreizelement 19 durch die Befestigungsöffnung 27 des Werkzeugs 22 hindurch in die Arbeitsspindel 11 hineingesteckt und gegen die Wirkung der Druckfeder 21 in Richtung des Pfeils 34 gedrückt, bis der Zwischenflansch in der Ausnehmung 28 von innen an der Tragplatte 23 anliegt und schließlich unter Federspannung gehalten ist, so daß das Werkzeug 22 gegen den Halteabschnitt 14 der Arbeitsspindel 11 gespannt ist. Anschließend kann ein Schleifpapierstück 26 mittels des Klettenhaftmaterials 25 auf der Oberfläche des Tragkörpers 24 befestigt werden.The attachment of the tool 22 takes place in the opposite direction. For this purpose, the tension anchor 17 is together with the Spreading element 19 through the fastening opening 27 of the tool 22 inserted into the work spindle 11 and against the action of the compression spring 21 pressed in the direction of the arrow 34, until the intermediate flange in the recess 28 from the inside abuts the support plate 23 and finally under spring tension is held so that the tool 22 against the Holding section 14 of the work spindle 11 is clamped. Subsequently can a piece of sandpaper 26 by means of the Velcro adhesive material 25 are attached to the surface of the support body 24.

Um zusätzlich die Mitnahme zwischen Arbeitsspindel 11 und Spreizelement 19 zu verbessern, kann zwischen beiden ein Formschluß z.B. als Profilierung oder Riffelung 33 vorgesehen sein, wie dies in Fig. 2 angedeutet ist.To additionally take along between work spindle 11 and To improve expansion element 19, a positive connection between the two e.g. be provided as profiling or corrugation 33, as indicated in Fig. 2.

Eine Variante der Ausführung gemäß Fig. 1 ist in Fig. 3 dargestellt und insgesamt mit der Ziffer 40 bezeichnet.A variant of the embodiment according to FIG. 1 is shown in FIG. 3 and designated overall by the number 40.

Wiederum weist das Handwerkzeug 40 eine in nicht näher dargestellter Weise oszillierend angetriebene Arbeitsspindel 41 auf, mit einem ersten, äußeren Ende 42, an dem ein Halteabschnitt 44 in Form eines Flansches ausgebildet ist, und mit einem zweiten, dem ersten Ende 42 gegenüberliegenden Ende 43. Ein insgesamt mit der Ziffer 52 bezeichnetes Werkzeug, das wiederum als Schleifwerkzeug gemäß der zuvor anhand von Fig. 1 beschriebenen Ausführung ausgebildet sein kann, ist mit seiner Tragplatte 53 an dem Halteabschnitt 44 mittels eines Befestigungsflansches 45 gehalten, der mit einem starr damit verbundenen Spannanker 47 in einem Spreizelement 49 unter der Spannung einer Feder 51 gehalten ist. Der Spannanker 47 weist an seinem dem Befestigungsflansch 45 gegenüberliegende Ende einen konischen Abschnitt 48 auf, an den sich ein Fortsatz 54 anschließt, der von einem Druckstück 46 abgeschlossen ist. Das Spreizelement 49, das von dem Spannanker 47 durchsetzt ist, weist im Bereich des konischen Abschnittes 48 einen entsprechend geneigten Spreizkonus 50 auf. Zwischen der Stirnfläche des Spreizelementes 49 und dem Druckstück 46 ist eine Feder 51 gehalten, durch die der Spannanker 47 mit seinem konischen Abschnitt 48 gegen den Spreizkonus 50 des Spreizelementes beaufschlagt wird. Das Spreizelement 49 wird so unter Wirkung der Feder 51 leicht aufgespreizt, so daß der Spannanker 47 reibschlüssig in der Arbeitsspindel 41 aufgenommen ist. Somit ist das Werkzeug 52 reibschlüssig zwischen dem Befestigungsflansch 45 und dem Halteabschnitt 44 eingespannt.Again, the hand tool 40 has one not shown in FIG Has oscillating driven work spindle 41, having a first, outer end 42 on which a holding section 44 is in the form of a flange, and with a second, end 43 opposite end 43. a total Tool designated with the number 52, which in turn as Grinding tool according to that previously described with reference to FIG. 1 Execution can be formed with its support plate 53 on the holding section 44 by means of a fastening flange 45 held with a rigid anchor 47 held in a spreading element 49 under the tension of a spring 51 is. The tension anchor 47 has on its the mounting flange 45 opposite end a conical section 48 on, which is followed by an extension 54 by a Pressure piece 46 is completed. The expansion element 49, the the tension anchor 47 is penetrated, points in the region of the conical Section 48 a correspondingly inclined expansion cone 50 on. Between the end face of the expansion element 49 and the Pressure piece 46 is held a spring 51 through which the Tension anchor 47 with its conical section 48 against the Expansion cone 50 of the expansion element is applied. The Spreading element 49 is spread slightly under the action of spring 51, so that the tension anchor 47 frictionally in the work spindle 41 is included. Thus, the tool is 52 frictionally between the mounting flange 45 and the holding portion 44 clamped.

Der Spannanker 47 kann zum Zwecke der Erzielung einer besseren Vorspannkraft auch hohl ausgebildet sein und im Bereich des konischen Abschnitts 48 geschlitzt ausgebildet sein.The tension anchor 47 can be used for the purpose of achieving a better one Preload force can also be hollow and in the area of the conical Section 48 may be slotted.

Zum Herausnehmen ist ein Betätigungselement 55 in Form eines klappbaren Bügels vorgesehen, an dem die gesamte Spanneinheit herausgezogen werden kann. Sofern die Arbeitsspindel 41 an ihrem dem Werkzeug 52 abgewandten Ende zugänglich ausgeführt werden kann, kann alternativ das Druckstück 46 gegen die Wirkung der Feder 51 gedrückt werden, so daß die Spreizung des Spreizelementes 49 aufgehoben wird und der Spannanker 47 samt Spreizelement 49 aus der Arbeitsspindel 41 herausgezogen werden kann.To remove it is an actuating element 55 in the form of a foldable bracket provided on which the entire tensioning unit can be pulled out. If the work spindle 41 its end facing away from the tool 52 is accessible can alternatively be the pressure piece 46 against the action the spring 51 are pressed so that the spread of the Expansion element 49 is lifted and the tension anchor 47 together Spreading element 49 are pulled out of the work spindle 41 can.

Ein weiteres Ausführungsbeispiel der Erfindung ist in Fig. 4 insgesamt mit der Ziffer 60 bezeichnet.Another exemplary embodiment of the invention is shown in FIG. 4 designated overall by the number 60.

Innerhalb eines lediglich rein schematisch angedeuteten Gehäuses 79 ist eine als Hohlspindel ausgebildete Arbeitsspindel 61 vorgesehen, die in bekannter Weise von einem nicht dargestellten Oszillationsantrieb angetrieben wird. In der Arbeitsspindel 61 ist eine Spannhülse 69 aufgenommen, die an ihrem dem Werkzeug 72 zugewandten Ende konisch nach außen aufgespreizt ist und mit einem konischen Abschnitt 70 an einer konischen Innenfläche 76 der Arbeitsspindel 61 in diesem Bereich anliegt. Am äußeren Ende der Spannhülse 69 ist ein Befestigungsf lansch 64 angeformt, mittels dessen das Werkzeug 72 gegen einen Halteabschnitt 64 in Form eines Flansches am ersten, äußeren Ende 62 der Arbeitsspindel 61 verspannt werden kann.Within a purely schematically indicated housing 79 is a work spindle 61 designed as a hollow spindle provided in a known manner by a not shown Oscillation drive is driven. In the work spindle 61, an adapter sleeve 69 is received on the tool 72 facing end is spread out conically and with a conical section 70 on a conical inner surface 76 of the work spindle 61 abuts in this area. At the outer end of the clamping sleeve 69 is a mounting flange 64 molded by means of which the tool 72 against a holding section 64 in the form of a flange at the first, outer end 62 the work spindle 61 can be clamped.

Innerhalb der Spannhülse 69 ist ein Spannanker 67 aufgenommen, der an seinem äußeren, werkzeugseitigen Ende durch einen Spannkegel 68 abgeschlossen ist, der der Steigung des konischen Abschnittes 70 der Spannhülse 69 angepaßt ist. Die Spannhülse 69 weist etwa in der Mitte ihrer Längserstreckung einen Absatz 79a auf, an dem eine Druckfeder 71 anliegt, die an ihrem anderen Ende an einem Absatz 79b des Spannankers 67 angreift, um diesen in Richtung auf das zweite, dem ersten Ende 62 der Arbeitsspindel 61 gegenüberliegenden Ende zu beaufschlagen. Durch die Federvorspannung wird die Spannhülse 69 an ihrem konischen Abschnitt 70 mit Hilfe des Spannkegels 68 nach außen aufgeweitet, so daß die Spannhülse 69 reibschlüssig an der Arbeitsspindel 61 gehalten ist.A clamping anchor 67 is received within the clamping sleeve 69, that at its outer, tool-side end by a clamping cone 68 is completed, the slope of the conical section 70 of the adapter sleeve 69 is adapted. The adapter sleeve 69 has a shoulder 79a approximately in the middle of its longitudinal extent on which a compression spring 71 rests, the other End engages a shoulder 79b of the tension anchor 67 to this towards the second, first end 62 of the work spindle 61 act opposite end. Through the Spring preload is the clamping sleeve 69 on its conical Section 70 widened outwards with the aid of the tensioning cone 68, so that the clamping sleeve 69 frictionally on the work spindle 61 is held.

Dies wird zusätzlich noch dadurch unterstützt, daß die Spannhülse 69 im Bereich ihres konischen Abschnittes 70 durch mehrere, in Axialrichtung verlaufende Schlitze 78 geteilt ist, so daß die Spannhülse 69 in diesem Bereich selbst eine Federwirkung besitzt. Der Spannanker 67 kann also samt Spannhülse 69 durch die Befestigungsöffnung 77 des Werkzeuges 72 in die Arbeitsspindel 61 eingeschoben und angedrückt werden, bis sie unter Federspannung in der Arbeitsspindel 61 reibschlüssig gehalten ist, so daß das Werkzeug 72 mit seiner Tragplatte 73 durch den Befestigungsflansch 65 sicher gegen den Halteabschnitt 64 verspannt ist.This is additionally supported by the fact that the adapter sleeve 69 in the area of its conical section 70 by several, in the axial direction slots 78 is divided, so that the clamping sleeve 69 itself has a spring action in this area has. The tension anchor 67 can therefore include the tensioning sleeve 69 through the fastening opening 77 of the tool 72 into the Work spindle 61 inserted and pressed until they under spring tension in the work spindle 61 frictionally is held so that the tool 72 with its support plate 73rd through the mounting flange 65 securely against the holding portion 64 is braced.

Der Spannanker 67 ist an seinem dem Werkzeug 72 gegenüberliegenden Ende durch ein Druckstück 66 verlängert, das nach außen aus dem Gehäuse 79 hervorsteht.The tension anchor 67 is on its opposite the tool 72 End extended by a pressure piece 66 that outwards protrudes from the housing 79.

Hierdurch wird eine einfache Entnahme des Werkzeuges 72 ermöglicht, indem Druck auf das Druckstück 66 ausgeübt wird. Das Werkzeug 72 läßt sich dann samt Spannanker 67 und Spannhülse 69 leicht herausnehmen.This enables easy removal of the tool 72, by applying pressure to the pressure piece 66. The Tool 72 can then together with clamping anchor 67 and clamping sleeve 69th take it out easily.

Durch den größeren Spannweg als bei der Ausführung gemäß den Figuren 1 bis 3 kann auch der Befestigungsflansch 65 so gestaltet sein, daß dieser beim Verfahren des Spannkegels 68 so weit zurückweicht, daß der Befestigungsflansch 65 durch die Befestigungsöffnung 77 gezogen werden kann.Due to the larger span than in the version according to Figures 1 to 3 can also design the mounting flange 65 be that this when moving the tension cone 68 so far retracts that the mounting flange 65 through the mounting opening 77 can be pulled.

Das Werkzeug 72 kann wiederum, wie zuvor bereits anhand der Fig. 1 dargestellt, an der Unterseite der Tragplatte 73 mit einem Tragkörper 74 versehen sein, an dem ein Klettenhaftmaterial zur Aufnahme eines Schleif- oder Poliermittels vorgesehen ist.The tool 72 can in turn, as previously based on the Fig. 1 shown on the underside of the support plate 73 with be provided a support body 74 on which a Velcro adhesive material intended to hold an abrasive or polishing agent is.

Claims (9)

  1. A hand-held power tool comprising an oscillatory drive oscillatingly driving a working spindle (11, 41) about a longitudinal axis (32) for driving a tool (22, 52), wherein the tool (22, 52) can be mounted between a holding section (14, 44) on a first end (12, 42) of the working spindle (11, 41) facing the tool, and between a mounting flange (15, 45), characterized in that the mounting flange (15, 45) is rigidly connected with a clamping bolt (17, 47) protruding through a strutting element (19, 49) by means of which the clamping bolt (17, 47) can be biased against the working spindle (11, 41), and in that the working spindle (11, 41) is configured as a hollow spindle into which the strutting element (19, 49) can be inserted together with the clamping bolt (17, 47) from outside.
  2. The hand-held tool of claim 1 which further comprises an intermediate flange (16) being connected with the strutting element (19) and being arranged between the mounting flange (15) and the holding section (14).
  3. The hand-held tool of claim 1 or 2, wherein the clamping bolt (17, 47) comprises a conically shaped clamping section (18, 48) which cooperates with a strutting cone (20, 50) on the strutting element (19, 49) for expanding the strutting element (19, 49).
  4. The hand-held tool of any of claims 1, 2 or 3, wherein the clamping bolt (17, 47) is elastically biased against the strutting element (19, 49).
  5. The hand-held tool of claim 3 or 4, wherein the strutting cone (20, 50) is provided at a second end (13, 43) which faces the first end (12, 42) of the working spindle (11, 41).
  6. A hand-held power tool comprising an oscillatory drive oscillatingly driving a working spindle (61) about its longitudinal axis (32) for driving a tool (72), wherein the tool (72) can be mounted between a holding section (64) at a first end (62) of the working spindle (61) facing the tool, and between a mounting flange (65), characterized in that the mounting flange (65) is connected with a clamping sleeve (69) which is penetrated by a clamping bolt (67) which can be displaced between a clamping position in which the clamping sleeve (49) is biased against the working spindle (61), and between a released position, and in that the working spindle is configured as a hollow spindle into which the clamping sleeve (69) can be inserted together with the clamping bolt (67) from outside.
  7. The hand-held tool of claim 6, wherein the clamping sleeve (69) comprises a conical section (70) into which the clamping bolt (67) engages with a clamping cone (68) which is biased by means of an elastic element (71) against the conical section (70) for biasing the mounting flange (65) against the holding section (64).
  8. The hand-held tool of claim 7, wherein the conical section (70) of the clamping sleeve (69) is configured slotted in axial direction.
  9. The hand-held tool of any of claims 1 to 5, wherein the clamping bolt (47) or the strutting element (19) comprises an actuating element (55, 16) accessible from the tool side for pulling out the clamping bolt and the strutting element (17, 47, 19, 49).
EP99106257A 1998-05-30 1999-04-14 Hand-held power tool Expired - Lifetime EP0962283B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19824387A DE19824387A1 (en) 1998-05-30 1998-05-30 Power-driven hand tool
DE19824387 1998-05-30

Publications (2)

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EP0962283A1 EP0962283A1 (en) 1999-12-08
EP0962283B1 true EP0962283B1 (en) 2003-12-10

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EP (1) EP0962283B1 (en)
DE (2) DE19824387A1 (en)
ES (1) ES2210883T3 (en)

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US9555554B2 (en) 2013-05-06 2017-01-31 Milwaukee Electric Tool Corporation Oscillating multi-tool system

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USD832666S1 (en) 2012-07-16 2018-11-06 Black & Decker Inc. Oscillating saw blade
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USD814900S1 (en) 2017-01-16 2018-04-10 Black & Decker Inc. Blade for oscillating power tools
US10265778B2 (en) 2017-01-16 2019-04-23 Black & Decker Inc. Accessories for oscillating power tools
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CN100574993C (en) * 2004-04-23 2009-12-30 C.&E.泛音有限公司 Hand-held power tool with tool clamping device
US9555554B2 (en) 2013-05-06 2017-01-31 Milwaukee Electric Tool Corporation Oscillating multi-tool system

Also Published As

Publication number Publication date
ES2210883T3 (en) 2004-07-01
DE59907988D1 (en) 2004-01-22
DE19824387A1 (en) 1999-12-02
EP0962283A1 (en) 1999-12-08

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