EP1684944B1 - Tool receiving device for a machine tool, comprising an at least essentially disk-shaped hub - Google Patents

Tool receiving device for a machine tool, comprising an at least essentially disk-shaped hub Download PDF

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Publication number
EP1684944B1
EP1684944B1 EP04786843A EP04786843A EP1684944B1 EP 1684944 B1 EP1684944 B1 EP 1684944B1 EP 04786843 A EP04786843 A EP 04786843A EP 04786843 A EP04786843 A EP 04786843A EP 1684944 B1 EP1684944 B1 EP 1684944B1
Authority
EP
European Patent Office
Prior art keywords
receiving device
tool receiving
drive shaft
tool
carry
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 - Fee Related
Application number
EP04786843A
Other languages
German (de)
French (fr)
Other versions
EP1684944A1 (en
Inventor
Ernst Kraenzler
Peter Stierle
Albrecht Hofmann
Juergen Wiker
Harald Krondorfer
Markus Heckmann
Joachim Schadow
Sinisa Andrasic
Thomas Schomisch
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
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Publication of EP1684944A1 publication Critical patent/EP1684944A1/en
Application granted granted Critical
Publication of EP1684944B1 publication Critical patent/EP1684944B1/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29—Details; Component parts; Accessories
    • B27B5/30—Details; Component parts; Accessories for mounting or securing saw blades or saw spindles
    • B27B5/32—Devices for securing circular saw blades to the saw spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/06—Making machine elements axles or shafts
    • B21K1/12—Making machine elements axles or shafts of specially-shaped cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/022—Spindle-locking devices, e.g. for mounting or removing the tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028—Angle 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
    • 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

Definitions

  • the invention is particularly based on a tool receiving device according to the preamble of claim 1.
  • a generic tool receiving device of an angle grinder for an insert tool with a disk-shaped hub comprises a drive shaft and a driving device, wherein the insert tool via three movable against a spring element locking elements of the driving device with the driving device is operatively connected, which engages in the operating position of the insert tool and fixes the insert tool in the circumferential direction positively.
  • the drive shaft is connected non-positively in the circumferential direction with a driving flange of the driving device.
  • the invention relates to a tool receiving device for an insert tool having an at least substantially disc-shaped hub, in particular for a hand-held angle grinder or a circular saw, with a drive shaft and a driving device, the at least one movable against a spring element latching element for positive fixing of the insert tool in the circumferential direction having.
  • the drive shaft has at least one non-machined molded positive-locking element for the positive connection in the circumferential direction with a means of the driving device for driving torque transmission.
  • It can be structurally simple and inexpensive connection between the drive shaft, the means of the driving device, in particular a driving flange, and the insert tool can be achieved via the high torque can be transmitted, in particular by cost large transmission surfaces can be achieved without at least significant material weaknesses.
  • the solution according to the invention is thus particularly suitable for machines with high performance, in particular for network machines.
  • the drive shaft can in principle be formed by a motor shaft, an output shaft of a transmission, in particular an angular gear, or by a subsequent to an output shaft of a transmission in the direction of the insert tool shaft.
  • the interlocking element may be formed by an integrally formed groove in which an additional, for example, tooth-like transmission means may be attached, whereby this can be targeted specifically with regard to its material properties on the existing loads, or the interlocking element can advantageously directly for contacting with the means of Drive device or the driving flange can be used, which additional components, assembly costs and costs can be saved.
  • the positive-locking element is formed by a pressing process on the drive shaft, this can advantageously be realized cost-effectively with close tolerances.
  • a pressing process other methods that appear appropriate to a person skilled in the art are also conceivable for machining the positive-locking element without machining on the drive shaft, such as, for example, a casting method, etc.
  • the interlocking element has a greater length extension in the axial direction of the drive shaft than height, which in particular space-saving large transfer surfaces and associated small surface pressures and a small wear can be achieved.
  • the drive shaft has at least three interlocking elements, an advantageously uniform distribution of forces can be achieved with an overall large transfer surface.
  • only one or two positive locking elements are conceivable.
  • the means of the driving device at its inner circumference at least one forming a positive locking element continuous axial groove, whereby a particularly cost-effective production of the agent can be achieved, in particular if it is formed by a sintered part.
  • the means of the driving device is supported via a spacer element on the drive shaft. Transitions between the interlocking element and adjacent areas caused by a production process can advantageously be bridged by means of the spacer element and costly contours corresponding to the transitions at the center of the entrainment device can be avoided.
  • the spacer element is advantageously formed by a sleeve which is easy to assemble and by means of the structurally simple uniform support can be realized.
  • the tool receiving device comprises a leaf spring unit which has at least one free spring web extending at least partially in the circumferential direction, whereby a space-saving leaf spring unit with a contour which can be produced easily and with an advantageous force transmission can be achieved cost-effectively.
  • free spring bar should in this context a spring bar with at least one free end to be understood.
  • Fig. 1 shows an angle grinder 32 from above with a mounted in a housing 34, not shown electric motor.
  • the angle grinding machine 32 can be guided via a first, in the housing 34 on a side facing away from an insert tool 14, extending in the longitudinal direction handle 36 and a second attached to a transmission housing 38 in the field of insert tool 14, transversely to the longitudinal direction extending handle 40.
  • the electric motor via a not-shown angle gear and a drive shaft 16 and a driving device 12 comprehensive tool holding device, the insert tool 14 is driven in rotation (Fig. 2).
  • the drive shaft 16 formed by an output shaft of the angular gear has at its free end three machined via an extrusion process molded positively locking elements 100 for positive connection in the circumferential direction 50, 52 with a contact surface 30 for the insert tool 14 forming driving flange 10 of the driving device 12 for driving torque transmission.
  • an internal thread 136 is introduced into the drive shaft 16, the drive shaft 16 is reworked by turning, case hardened and then ground in certain areas, especially in storage areas.
  • the interlocking elements 100 have a greater length extension 102 in the axial direction 64 of the drive shaft 16 than height 104 and are formed with a rectangular cross-sectional area.
  • the form-fitting elements 100 of the drive shaft 16 engage directly on the driving flange 10 for direct drive torque transmission into the form-fitting elements 106 formed on the inner periphery of the driving flange 10 formed by a sintered part, which are formed by continuous axial grooves (FIGS. 2 and 3).
  • the driving flange 10 is centered by the radially outwardly facing outer surfaces of the form-locking elements 100.
  • the driving flange 10 is supported on a collar 130 of the drive shaft 16 via a spacer element 108 formed by a sleeve.
  • the spacer element 108 covers a production-related transition 132 between a designated by the interlocking elements 100 area at the free end of the drive shaft 16 and an adjacent in the axial direction 64 area.
  • a collar 26 is formed on a side facing the insert tool 14, over which the insert tool 14 is radially centered with its center hole 46 in the mounted state.
  • three mold elements 22 are arranged, which are formed by radially outwardly extending projections.
  • the with the Bund 26 integrally formed mold elements 22 are arranged distributed uniformly over an outer circumference of the collar 26 and have in the axial direction 54, 64 a distance 28 to the contact surface 30. With its end facing the insert tool 14, the collar 26 projects beyond the shaped elements 22 in the axial direction 54.
  • a metal plate 48 On a side facing away from the insert tool 14 of the driving flange 10 is a metal plate 48 with three circumferentially 50, 52 evenly distributed, integrally formed, extending in the axial direction 54 clamping hooks 56 for axially fixing the insert tool 14.
  • the clamping hooks 56 are formed in a bending operation on the metal plate 48.
  • the driving flange 10 When mounting the driving device 12, the driving flange 10, a leaf spring unit 58 and the metal plate 48 are pre-assembled.
  • the leaf spring unit 58 is pushed onto a collar of the driving flange 10, which faces away from the insert tool 14 direction.
  • the clamping hooks 56 of the sheet-metal plate 48 which at its free end have a hook-shaped extension with an oblique surface 94 pointing in the circumferential direction 52, are guided in the axial direction 54 through recesses 60 of the driving flange 10 (FIGS. 2 and 3).
  • the leaf spring unit 58 By compressing and rotating the metal plate 48 and the driving flange 10 against each other, the leaf spring unit 58 is biased and the metal plate 48 and the driving flange 10 are positively connected in the axial direction 54, 64 (FIGS. 2 and 3).
  • the metal plate 48 is then, loaded by the leaf spring unit 58, on the contact surface 30 of the driving flange 10 supported over edges of the hook-shaped extensions which point axially in the direction away from the insert tool 14 direction.
  • the leaf spring unit 58 has three identical, in the circumferential direction 50, 52 extending free spring webs 110, which are each formed via a radially inwardly extending connecting web 112 integral with a retaining ring 114 (Fig. 4).
  • the connecting web 112 and the spring bar 110 are formed substantially T-shaped, wherein the spring bar 110 is arcuately formed with two free ends and the connecting web 112 in the middle of the spring bar 110 connects to the same.
  • the spring bar 110 has a decreasing width 120 towards its free ends 116, 118 and has a thickness 126 of approximately 0.9 mm.
  • the leaf spring unit 58 rests with its retaining ring 114 on the driving flange 10, wherein the spring webs 110 are each bent starting from the connecting web 112 in the direction of their free ends 116, 118 in the direction away from the driving flange 10 and are supported on the tabs 68 of the metal plate 48 , To avoid a linear support formed integrally formed bearing surfaces 122, 124 are formed on the free ends 116, 118 of flats or the free ends 116, 118 of the spring bars 110 in the direction of the driving flange 10 bent slightly.
  • radially outwardly extending coding means 128 are formed on the outer circumference of the retaining ring 114 next to the connecting webs 112, which correspond with the clamping hooks 56 and bolts 20 of the driving device 12 during assembly.
  • the metal plate 48 can be performed in a twisted position with their clamping hooks 56 through recesses of the leaf spring unit 58, but then a drive plate 96 with its bolts 20 due to the coding means 128 are no longer passed through the leaf spring unit 58.
  • the leaf spring unit 58 and the driving flange 10 are pre-assembled, is formed by a helical compression spring element 18 and the drive plate 96 with its three evenly distributed over the circumference, extending in the axial direction 54 bolt 20 the drive shaft 16 attached (Fig. 2).
  • the preassembled assembly consisting of the metal plate 48, the leaf spring unit 58 and the driving flange 10, mounted on the drive shaft 16.
  • the bolts 20 are guided during assembly by integrally formed on the circumference of the metal plate 48 tabs 68, the holes 70, and located in the driving flange 10 through holes 72 and engage in the assembled state through the through holes 72.
  • the interlocking elements 100 on the drive shaft 16 are in introduced the positive locking elements 106 of the driving flange 10.
  • radially inwardly extending formations 134 are introduced into grooves 62 introduced on the outer circumference of the drive flange 10. The metal plate 48 and the drive plate 96 are secured to each other via the bolts 20 against rotation.
  • the driving device 12 is secured to the drive shaft 16 with a screw 74.
  • the insertion tool 14 formed by a cutting disk has a substantially disk-shaped sheet metal hub 42 formed by a separate component, which has three uniformly distributed, cup-shaped recesses 76 extending in the axial direction 54 in the circumferential direction 50, 52, whose diameters are slightly larger than The diameter of the bolts 20. Further, the sheet metal hub 42 has three evenly distributed in the circumferential direction 50, 52, extending in the circumferential direction 50, 52 recesses 78, each having a narrow and a wide range 80, 82.
  • the diameter of the centering bore 46 of the sheet metal hub 42 is selected so that the insert tool 14 can be clamped with a conventional clamping system with a clamping flange and a spindle nut on a conventional angle grinder. It ensures a so-called backward compatibility.
  • the sheet metal hub 42 of the insertion tool 14 has three mold elements 24 which are distributed in the circumferential direction 50, 52 uniformly over the circumference of the centering bore 46 (FIG. 2).
  • the mold elements 24 are formed here by recesses.
  • the mold elements 22 of the tool receiving device and the mold elements 24 of the insert tool 14 are matched, corresponding mold elements to simplify installation of the insert tool 14. Furthermore, the corresponding mold elements 22, 24 form a coding means for avoiding assembly of an impermissible insert tool For this purpose, the corresponding form elements 22, 24 with respect to a diameter of the insert tool 14 matched to each other, so that use tools for use in high-speed machines have a wide shape element or a wide coding and use tools for use in machines with low speed a narrow form element or a narrow coding.
  • the sheet metal hub 42 of the insert tool 14 is connected via a rivet connection firmly with an abrasive and pressed and is executed by a pointing in the axial direction 64 44 formation cup-shaped.
  • the insert tool 14 When mounting the insert tool 14, the insert tool 14 is pushed with its center hole 46 on the mold elements 22 in the axial direction 54 superior part of the collar 26 and pre-centered radially. The insert tool 14 comes here to contact surfaces 84 of the mold elements 22 to lie. Twisting the insert tool 14 in the circumferential direction 50, 52 brings the mold elements 22, 24 to cover. The insert tool 14 or the sheet metal hub 42 can then slide in the axial direction 64 in the direction of the contact surface 30, and the sheet metal hub 42 comes to rest on the bolt 20.
  • the sheet metal hub 42 can be rotated counter to a drive direction 98.
  • the rotation of the sheet metal hub 42 causes the sheet metal hub 42 to slide with its edge of the centering bore 46 into the distance 28 between the shaped elements 22 and the abutment surface 30 of the driving flange 10 and can be secured against falling down by the shaped elements 22 in the axial direction.
  • the rotation of the sheet metal hub 42 causes the hook-shaped extensions to be displaced into the arcuate, narrow regions 80 of the recesses 78 of the sheet metal hub 42.
  • the metal plate 48 is moved by the clamping hooks 56 by non-illustrated inclined surfaces axially against the pressure of the leaf spring unit 58 in the direction 54 until bearing surfaces of the hook-shaped projections in the arcuate, narrow areas 80 laterally adjacent to the recesses 78 of the sheet metal hub 42 come to rest.
  • arcuate grooves 66 are introduced into the contact surface 30 of the driving flange 10, on the lying on the support surface 30, unwanted particles can be conveyed to the outside of the driving device 12.
  • a release button 92 is pressed in the axial direction 64.
  • the release button 92 pushes the drive plate 96 in the axial direction 64, and the formations 86 of the drive plate 96 come with the lock pockets 88 into engagement.
  • the drive shaft 16 is locked.
  • the bolts 20 are in this case with the recesses 76 of the sheet metal hub 42 disengaged, and the sheet metal hub 42 can be rotated in the circumferential direction 52 until the clamping hooks 56 can slide through the recesses 78.
  • the mold elements 22, 24 in this case reach into a corresponding position, and the sheet metal hub 42 can be removed in the axial direction 54.

Description

Stand der TechnikState of the art

Die Erfindung geht insbesondere aus von einer Werkzeugaufnahmevorrichtung nach dem Oberbegriff des Anspruchs 1.The invention is particularly based on a tool receiving device according to the preamble of claim 1.

Aus der DE 100 17 458 A1 und aus der US 20 030 104 773 ist eine gattungsbildende Werkzeugaufnahmevorrichtung einer Winkelschleifmaschine für ein Einsatzwerkzeug mit einer scheibenförmigen Nabe bekannt. Die Werkzeugaufnahmevorrichtung umfasst eine Antriebswelle und eine Mitnahmevorrichtung, wobei das Einsatzwerkzeug über drei gegen ein Federelement bewegbar gelagerte Rastelemente der Mitnahmevorrichtung mit der Mitnahmevorrichtung wirkungsmäßig verbindbar ist, das in der Betriebsstellung des Einsatzwerkzeugs einrastet und das Einsatzwerkzeug in Umfangsrichtung formschlüssig fixiert. Die Antriebswelle ist dabei in Umfangsrichtung kraftschlüssig mit einem Mitnahmeflansch der Mitnahmevorrichtung verbunden.From the DE 100 17 458 A1 and from the US 20 030 104 773 For example, a generic tool receiving device of an angle grinder for an insert tool with a disk-shaped hub is known. The tool receiving device comprises a drive shaft and a driving device, wherein the insert tool via three movable against a spring element locking elements of the driving device with the driving device is operatively connected, which engages in the operating position of the insert tool and fixes the insert tool in the circumferential direction positively. The drive shaft is connected non-positively in the circumferential direction with a driving flange of the driving device.

Vorteile der ErfindungAdvantages of the invention

Die Erfindung geht aus von einer Werkzeugaufnahmevorrichtung für ein Einsatzwerkzeug mit einer zumindest im Wesentlichen scheibenförmigen Nabe, insbesondere für eine handgeführte Winkelschleifmaschine oder eine Handkreissäge, mit einer Antriebswelle und einer Mitnahmevorrichtung, die zumindest ein gegen ein Federelement bewegbar gelagertes Rastelement zur formschlüssigen Fixierung des Einsatzwerkzeugs in Umfangsrichtung aufweist.The invention relates to a tool receiving device for an insert tool having an at least substantially disc-shaped hub, in particular for a hand-held angle grinder or a circular saw, with a drive shaft and a driving device, the at least one movable against a spring element latching element for positive fixing of the insert tool in the circumferential direction having.

Es wird vorgeschlagen, dass die Antriebswelle zumindest ein zerspanungslos angeformtes Formschlusselement zur formschlüssigen Verbindung in Umfangsrichtung mit einem Mittel der Mitnahmevorrichtung zur Antriebsdrehmomentübertragung aufweist. Es kann konstruktiv einfach und kostengünstig eine Verbindung zwischen der Antriebswelle, dem Mittel der Mitnahmevorrichtung, insbesondere einem Mitnahmeflansch, und dem Einsatzwerkzeug erreicht werden, über die hohe Drehmomente übertragen werden können, und zwar insbesondere indem kostengünstig große Übertragungsflächen ohne zumindest wesentliche Materialschwächungen erreicht werden können. Die erfindungsgemäße Lösung eignet sich damit besonders für Maschinen mit großer Leistung, wie insbesondere für Netzmaschinen. Die Antriebswelle kann dabei grundsätzlich von einer Motorwelle, einer Ausgangswelle eines Getriebes, insbesondere eines Winkelgetriebes, oder von einer an eine Ausgangswelle eines Getriebes in Richtung Einsatzwerkzeug anschließenden Welle gebildet sein.It is proposed that the drive shaft has at least one non-machined molded positive-locking element for the positive connection in the circumferential direction with a means of the driving device for driving torque transmission. It can be structurally simple and inexpensive connection between the drive shaft, the means of the driving device, in particular a driving flange, and the insert tool can be achieved via the high torque can be transmitted, in particular by cost large transmission surfaces can be achieved without at least significant material weaknesses. The solution according to the invention is thus particularly suitable for machines with high performance, in particular for network machines. The drive shaft can in principle be formed by a motor shaft, an output shaft of a transmission, in particular an angular gear, or by a subsequent to an output shaft of a transmission in the direction of the insert tool shaft.

Das Formschlusselement kann von einer angeformten Nut gebildet sein, in der ein zusätzliches, beispielsweise zahnartiges Übertragungsmittel befestigt sein kann, wodurch dieses im Hinblick auf seine Materialeigenschaften gezielt auf die vorliegenden Belastungen ausgerichtet werden kann, oder das Formschlusselement kann vorteilhaft direkt zur Kontaktierung mit dem Mittel der Mitnahmevorrichtung bzw. dem Mitnahmeflansch genutzt werden, wodurch zusätzliche Bauteile, Montageaufwand und Kosten eingespart werden können.The interlocking element may be formed by an integrally formed groove in which an additional, for example, tooth-like transmission means may be attached, whereby this can be targeted specifically with regard to its material properties on the existing loads, or the interlocking element can advantageously directly for contacting with the means of Drive device or the driving flange can be used, which additional components, assembly costs and costs can be saved.

Ist das Formschlusselement durch einen Pressvorgang an die Antriebswelle angeformt, kann dieses vorteilhaft kostengünstig mit engen Toleranzen realisiert werden. Neben einem Pressvorgang sind jedoch auch andere, dem Fachmann als sinnvoll erscheinende Verfahren denkbar, das Formschlusselement zerspanungslos an die Antriebswelle anzuformen, wie beispielsweise ein Gießverfahren usw.If the positive-locking element is formed by a pressing process on the drive shaft, this can advantageously be realized cost-effectively with close tolerances. In addition to a pressing process, however, other methods that appear appropriate to a person skilled in the art are also conceivable for machining the positive-locking element without machining on the drive shaft, such as, for example, a casting method, etc.

In einer weiteren Ausgestaltung der Erfindung wird vorgeschlagen, dass das Formschlusselement eine größere Längenerstreckung in axialer Richtung der Antriebswelle als Höhe aufweist, wodurch insbesondere platzsparend große Übertragungsflächen und damit verbunden kleine Flächenpressungen und ein kleiner Verschleiß erreichbar sind.In a further embodiment of the invention, it is proposed that the interlocking element has a greater length extension in the axial direction of the drive shaft than height, which in particular space-saving large transfer surfaces and associated small surface pressures and a small wear can be achieved.

Weist die Antriebswelle zumindest drei Formschlusselemente auf, kann bei einer insgesamt großen Übertragungsfläche eine vorteilhaft gleichmäßige Kräfteverteilung erzielt werden. Es sind jedoch auch nur ein oder zwei Formschlusselemente denkbar.If the drive shaft has at least three interlocking elements, an advantageously uniform distribution of forces can be achieved with an overall large transfer surface. However, only one or two positive locking elements are conceivable.

Ferner wird vorgeschlagen, dass das Mittel der Mitnahmevorrichtung an seinem Innenumfang wenigstens eine ein Formschlusselement bildende durchgängige Axialnut aufweist, wodurch eine besonders kostengünstige Herstellung des Mittels erreichbar ist, und zwar insbesondere, wenn dieses von einem Sinterteil gebildet ist.It is also proposed that the means of the driving device at its inner circumference at least one forming a positive locking element continuous axial groove, whereby a particularly cost-effective production of the agent can be achieved, in particular if it is formed by a sintered part.

Ist das Mittel der Mitnahmevorrichtung von einem eine Anlagefläche für das Einsatzwerkzeug bildenden Mitnahmeflansch gebildet, können zusätzliche Bauteile, Bauraum, Montageaufwand und Kosten eingespart werden.If the means of the driving device formed by a contact surface forming a contact surface for the insert tool, additional components, space, installation costs and costs can be saved.

In einer weiteren Ausgestaltung der Erfindung wird vorgeschlagen, dass das Mittel der Mitnahmevorrichtung über ein Distanzelement auf der Antriebswelle abgestützt ist. Durch einen Herstellprozess bedingte Übergänge zwischen dem Formschlusselement und angrenzenden Bereichen können vorteilhaft mittels dem Distanzelement überbrückt und kostenintensive, mit den Übergängen korrespondierende Konturen am Mittel der Mitnahmevorrichtung können vermieden werden. Dabei ist das Distanzelement vorteilhaft von einer Hülse gebildet, die einfach montierbar und mittels der konstruktiv einfach eine gleichmäßige Abstützung realisierbar ist.In a further embodiment of the invention it is proposed that the means of the driving device is supported via a spacer element on the drive shaft. Transitions between the interlocking element and adjacent areas caused by a production process can advantageously be bridged by means of the spacer element and costly contours corresponding to the transitions at the center of the entrainment device can be avoided. In this case, the spacer element is advantageously formed by a sleeve which is easy to assemble and by means of the structurally simple uniform support can be realized.

Ferner wird vorgeschlagen, dass die Werkzeugaufnahmevorrichtung eine Blattfedereinheit umfasst, die wenigstens einen sich zumindest teilweise in Umfangsrichtung erstreckenden freien Federsteg aufweist, wodurch kostengünstig eine platzsparende Blattfedereinheit mit einer einfach herstellbaren Kontur und mit einer vorteilhaften Kraftübertragung erzielt werden kann. Unter freiem Federsteg soll in diesem Zusammenhang ein Federsteg mit zumindest einem freien Ende verstanden werden.Furthermore, it is proposed that the tool receiving device comprises a leaf spring unit which has at least one free spring web extending at least partially in the circumferential direction, whereby a space-saving leaf spring unit with a contour which can be produced easily and with an advantageous force transmission can be achieved cost-effectively. Under free spring bar should in this context a spring bar with at least one free end to be understood.

Zeichnungdrawing

Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Further advantages emerge from the following description of the drawing. In the drawing, an embodiment of the invention is shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Es zeigen:

Fig. 1
eine schematisch dargestellte Winkelschleifmaschine von oben,
Fig. 2
eine Explosionszeichnung einer Werkzeugaufnahmevorrichtung mit einer Nabe eines Einsatzwerkzeugs,
Fig. 3
eine vergrößerte Darstellung eines Mitnahmeflansches aus Fig. 2 und
Fig. 4
eine vergrößerte Darstellung einer Blattfedereinheit aus Fig. 2.
Show it:
Fig. 1
a schematically illustrated angle grinder from above,
Fig. 2
an exploded view of a tool receiving device with a hub of an insert tool,
Fig. 3
an enlarged view of a driving flange of Fig. 2 and
Fig. 4
an enlarged view of a leaf spring unit of FIG. 2nd

Beschreibung des AusführungsbeispielsDescription of the embodiment

Fig. 1 zeigt eine Winkelschleifmaschine 32 von oben mit einem in einem Gehäuse 34 gelagerten, nicht näher dargestellten Elektromotor. Die Winkelschleifmaschine 32 ist über einen ersten, im Gehäuse 34 auf einer einem Einsatzwerkzeug 14 abgewandten Seite integrierten, sich in Längsrichtung erstreckenden Handgriff 36 und über einen zweiten an einem Getriebegehäuse 38 im Bereich des Einsatzwerkzeugs 14 befestigten, sich quer zur Längsrichtung erstreckenden Handgriff 40 führbar. Mit dem Elektromotor ist über ein nicht näher dargestelltes Winkelgetriebe und eine eine Antriebswelle 16 sowie eine Mitnahmevorrichtung 12 umfassende Werkzeugaufnahmevorrichtung das Einsatzwerkzeug 14 rotierend antreibbar (Fig. 2).Fig. 1 shows an angle grinder 32 from above with a mounted in a housing 34, not shown electric motor. The angle grinding machine 32 can be guided via a first, in the housing 34 on a side facing away from an insert tool 14, extending in the longitudinal direction handle 36 and a second attached to a transmission housing 38 in the field of insert tool 14, transversely to the longitudinal direction extending handle 40. With the electric motor via a not-shown angle gear and a drive shaft 16 and a driving device 12 comprehensive tool holding device, the insert tool 14 is driven in rotation (Fig. 2).

Die von einer Ausgangswelle des Winkelgetriebes gebildete Antriebswelle 16 weist an ihrem freien Ende drei zerspanungslos über einen Fließpressvorgang angeformte Formschlusselemente 100 zur formschlüssigen Verbindung in Umfangsrichtung 50, 52 mit einem eine Anlagefläche 30 für das Einsatzwerkzeug 14 bildenden Mitnahmeflansch 10 der Mitnahmevorrichtung 12 zur Antriebsdrehmomentübertragung auf. Nach dem Fließpressvorgang wird ein Innengewinde 136 in die Antriebswelle 16 eingebracht, die Antriebswelle 16 wird durch Drehen nachbearbeitet, einsatzgehärtet und anschließend in bestimmten Bereichen, insbesondere in Lagerbereichen, geschliffen.The drive shaft 16 formed by an output shaft of the angular gear has at its free end three machined via an extrusion process molded positively locking elements 100 for positive connection in the circumferential direction 50, 52 with a contact surface 30 for the insert tool 14 forming driving flange 10 of the driving device 12 for driving torque transmission. After the extrusion process, an internal thread 136 is introduced into the drive shaft 16, the drive shaft 16 is reworked by turning, case hardened and then ground in certain areas, especially in storage areas.

Die Formschlusselemente 100 weisen eine größere Längenerstreckung 102 in axialer Richtung 64 der Antriebswelle 16 als Höhe 104 auf und sind mit einer Rechteckquerschnittsfläche ausgebildet.The interlocking elements 100 have a greater length extension 102 in the axial direction 64 of the drive shaft 16 than height 104 and are formed with a rectangular cross-sectional area.

Im montierten Zustand greifen die Formschlusselemente 100 der Antriebswelle 16 zur direkten Antriebsdrehmomentübertragung auf den Mitnahmeflansch 10 in an den Innenumfang des von einem Sinterteil gebildeten Mitnahmeflansches 10 angeformte Formschlusselemente 106, die von durchgängigen Axialnuten gebildet sind (Fig. 2 und 3). Der Mitnahmeflansch 10 wird durch die in radialer Richtung nach außen weisenden Außenflächen der Formschlusselemente 100 zentriert.In the mounted state, the form-fitting elements 100 of the drive shaft 16 engage directly on the driving flange 10 for direct drive torque transmission into the form-fitting elements 106 formed on the inner periphery of the driving flange 10 formed by a sintered part, which are formed by continuous axial grooves (FIGS. 2 and 3). The driving flange 10 is centered by the radially outwardly facing outer surfaces of the form-locking elements 100.

In axialer Richtung 64 ist der Mitnahmeflansch 10 über ein von einer Hülse gebildetes Distanzelement 108 an einem Bund 130 der Antriebswelle 16 abgestützt. Das Distanzelement 108 überdeckt einen herstellungsbedingten Übergang 132 zwischen einem durch die Formschlusselemente 100 gekennzeichneten Bereich am freien Ende der Antriebswelle 16 und einem sich in axialer Richtung 64 angrenzenden Bereich.In the axial direction 64, the driving flange 10 is supported on a collar 130 of the drive shaft 16 via a spacer element 108 formed by a sleeve. The spacer element 108 covers a production-related transition 132 between a designated by the interlocking elements 100 area at the free end of the drive shaft 16 and an adjacent in the axial direction 64 area.

An den Mitnahmeflansch 10 ist auf einer dem Einsatzwerkzeug 14 zugewandten Seite ein Bund 26 angeformt, über den das Einsatzwerkzeug 14 mit seiner Zentrierbohrung 46 im montierten Zustand radial zentriert ist. An dem Bund 26 sind drei Formelemente 22 angeordnet, die von sich radial nach außen erstreckenden Vorsprüngen gebildet sind. Die mit dem Bund 26 einstückig ausgeführten Formelemente 22 sind gleichmäßig über einen Außenumfang des Bunds 26 verteilt angeordnet und weisen in axialer Richtung 54, 64 einen Abstand 28 zur Anlagefläche 30 auf. Mit seinem zum Einsatzwerkzeug 14 weisenden Ende überragt der Bund 26 in axialer Richtung 54 die Formelemente 22.At the driving flange 10, a collar 26 is formed on a side facing the insert tool 14, over which the insert tool 14 is radially centered with its center hole 46 in the mounted state. On the collar 26, three mold elements 22 are arranged, which are formed by radially outwardly extending projections. The with the Bund 26 integrally formed mold elements 22 are arranged distributed uniformly over an outer circumference of the collar 26 and have in the axial direction 54, 64 a distance 28 to the contact surface 30. With its end facing the insert tool 14, the collar 26 projects beyond the shaped elements 22 in the axial direction 54.

Auf einer vom Einsatzwerkzeug 14 abgewandten Seite des Mitnahmeflansches 10 ist eine Blechplatte 48 mit drei in Umfangsrichtung 50, 52 gleichmäßig verteilten, einstückig angeformten, sich in axialer Richtung 54 erstreckenden Spannhaken 56 zur axialen Fixierung des Einsatzwerkzeugs 14 angeordnet. Die Spannhaken 56 sind in einem Biegevorgang an die Blechplatte 48 angeformt.On a side facing away from the insert tool 14 of the driving flange 10 is a metal plate 48 with three circumferentially 50, 52 evenly distributed, integrally formed, extending in the axial direction 54 clamping hooks 56 for axially fixing the insert tool 14. The clamping hooks 56 are formed in a bending operation on the metal plate 48.

Bei der Montage der Mitnahmevorrichtung 12 werden der Mitnahmeflansch 10, eine Blattfedereinheit 58 und die Blechplatte 48 vormontiert. Dabei wird die Blattfedereinheit 58 auf einen Bund des Mitnahmeflansches 10 aufgeschoben, der in die vom Einsatzwerkzeug 14 abgewandte Richtung weist. Anschließend werden die Spannhaken 56 der Blechplatte 48, die an ihrem freien Ende einen hakenförmigen Fortsatz mit einer in Umfangsrichtung 52 weisenden Schrägfläche 94 aufweisen, in axialer Richtung 54 durch Ausnehmungen 60 des Mitnahmeflansches 10 geführt (Fig. 2 und 3). Durch Zusammendrücken und Verdrehen der Blechplatte 48 und des Mitnahmeflansches 10 gegeneinander wird die Blattfedereinheit 58 vorgespannt und die Blechplatte 48 und der Mitnahmeflansch 10 werden in axialer Richtung 54, 64 formschlüssig verbunden (Fig. 2 und 3). Die Blechplatte 48 ist anschließend, belastet durch die Blattfedereinheit 58, an der Anlagefläche 30 des Mitnahmeflansches 10 über Kanten der hakenförmigen Fortsätze abgestützt, die axial in die vom Einsatzwerkzeug 14 abgewandte Richtung weisen.
Die Blattfedereinheit 58 weist drei baugleiche, sich in Umfangsrichtung 50, 52 erstreckende freie Federstege 110 auf, die jeweils über einen radial nach innen verlaufenden Anschlusssteg 112 einstückig mit einem Haltering 114 ausgeführt sind (Fig. 4). Der Anschlusssteg 112 und der Federsteg 110 sind im Wesentlichen T-förmig ausgebildet, wobei der Federsteg 110 bogenförmig mit zwei freien Enden ausgebildet ist und der Anschlusssteg 112 in der Mitte des Federstegs 110 an demselben anschließt. Der Federsteg 110 weist zu seinen freien Enden 116, 118 hin eine abnehmende Breite 120 auf und besitzt eine Stärke 126 von ca. 0,9 mm. Die Blattfedereinheit 58 liegt mit ihrem Haltering 114 am Mitnahmeflansch 10 an, wobei die Federstege 110 jeweils ausgehend vom Anschlusssteg 112 in Richtung zu ihren freien Enden 116, 118 in die vom Mitnahmeflansch 10 abgewandte Richtung gebogen sind und an den Laschen 68 der Blechplatte 48 abgestützt sind. Zur Vermeidung einer linienförmigen Auflage sind an die freien Enden 116, 118 von Abflachungen gebildete, angeformte Auflageflächen 122, 124 angeformt bzw. sind die freien Enden 116, 118 der Federstege 110 in Richtung des Mitnahmeflansches 10 leicht aufgebogen.When mounting the driving device 12, the driving flange 10, a leaf spring unit 58 and the metal plate 48 are pre-assembled. In this case, the leaf spring unit 58 is pushed onto a collar of the driving flange 10, which faces away from the insert tool 14 direction. Subsequently, the clamping hooks 56 of the sheet-metal plate 48, which at its free end have a hook-shaped extension with an oblique surface 94 pointing in the circumferential direction 52, are guided in the axial direction 54 through recesses 60 of the driving flange 10 (FIGS. 2 and 3). By compressing and rotating the metal plate 48 and the driving flange 10 against each other, the leaf spring unit 58 is biased and the metal plate 48 and the driving flange 10 are positively connected in the axial direction 54, 64 (FIGS. 2 and 3). The metal plate 48 is then, loaded by the leaf spring unit 58, on the contact surface 30 of the driving flange 10 supported over edges of the hook-shaped extensions which point axially in the direction away from the insert tool 14 direction.
The leaf spring unit 58 has three identical, in the circumferential direction 50, 52 extending free spring webs 110, which are each formed via a radially inwardly extending connecting web 112 integral with a retaining ring 114 (Fig. 4). The connecting web 112 and the spring bar 110 are formed substantially T-shaped, wherein the spring bar 110 is arcuately formed with two free ends and the connecting web 112 in the middle of the spring bar 110 connects to the same. The spring bar 110 has a decreasing width 120 towards its free ends 116, 118 and has a thickness 126 of approximately 0.9 mm. The leaf spring unit 58 rests with its retaining ring 114 on the driving flange 10, wherein the spring webs 110 are each bent starting from the connecting web 112 in the direction of their free ends 116, 118 in the direction away from the driving flange 10 and are supported on the tabs 68 of the metal plate 48 , To avoid a linear support formed integrally formed bearing surfaces 122, 124 are formed on the free ends 116, 118 of flats or the free ends 116, 118 of the spring bars 110 in the direction of the driving flange 10 bent slightly.

Zur Vermeidung einer Fehlmontage, insbesondere einer seitenverkehrten Montage der Blattfedereinheit 58 sind am Außenumfang des Halterings 114 neben den Anschlussstegen 112 sich radial nach außen erstreckende Codierungsmittel 128 angeformt, die bei der Montage mit den Spannhaken 56 und Bolzen 20 der Mitnahmevorrichtung 12 korrespondieren. Wird die Blattfedereinheit 58 seitenverkehrt montiert, kann zwar die Blechplatte 48 in einer verdrehten Position mit ihren Spannhaken 56 durch Ausnehmungen der Blattfedereinheit 58 geführt werden, anschließend kann jedoch eine Mitnehmerscheibe 96 mit ihren Bolzen 20 aufgrund der Codierungsmittel 128 nicht mehr durch die Blattfedereinheit 58 hindurchgeführt werden.To avoid incorrect assembly, in particular a laterally reversed mounting of the leaf spring unit 58, radially outwardly extending coding means 128 are formed on the outer circumference of the retaining ring 114 next to the connecting webs 112, which correspond with the clamping hooks 56 and bolts 20 of the driving device 12 during assembly. Will the Leaf spring unit 58 mounted laterally reversed, although the metal plate 48 can be performed in a twisted position with their clamping hooks 56 through recesses of the leaf spring unit 58, but then a drive plate 96 with its bolts 20 due to the coding means 128 are no longer passed through the leaf spring unit 58.

Nachdem die Blechplatte 48 mit den angeformten Spannhaken 56, die Blattfedereinheit 58 und der Mitnahmeflansch 10 vormontiert sind, wird ein von einer Schraubendruckfeder gebildetes Federelement 18 und die Mitnehmerscheibe 96 mit ihren drei gleichmäßig über den Umfang verteilten, sich in axialer Richtung 54 erstreckenden Bolzen 20 auf die Antriebswelle 16 aufgesteckt (Fig. 2).After the sheet metal plate 48 with the molded clamping hooks 56, the leaf spring unit 58 and the driving flange 10 are pre-assembled, is formed by a helical compression spring element 18 and the drive plate 96 with its three evenly distributed over the circumference, extending in the axial direction 54 bolt 20 the drive shaft 16 attached (Fig. 2).

Anschließend wird die vormontierte Baugruppe, bestehend aus der Blechplatte 48, der Blattfedereinheit 58 und dem Mitnahmeflansch 10, auf die Antriebswelle 16 montiert. Die Bolzen 20 werden bei der Montage durch am Umfang der Blechplatte 48 angeformte Laschen 68, die Bohrungen 70 aufweisen, und durch im Mitnahmeflansch 10 befindliche Durchgangsbohrungen 72 geführt und greifen im montierten Zustand durch die Durchgangsbohrungen 72. Die Formschlusselemente 100 an der Antriebswelle 16 werden in die Formschlusselemente 106 des Mitnahmeflansches 10 eingeführt. Ferner werden am Innenumfang der Mitnehmerscheibe 96 sich radial nach innen erstreckende Ausformungen 134 in am Außenumfang des Mitnahmeflansches 10 eingebrachte Nuten 62 eingeführt. Die Blechplatte 48 und die Mitnehmerscheibe 96 sind über die Bolzen 20 gegen Verdrehen zueinander gesichert.Subsequently, the preassembled assembly, consisting of the metal plate 48, the leaf spring unit 58 and the driving flange 10, mounted on the drive shaft 16. The bolts 20 are guided during assembly by integrally formed on the circumference of the metal plate 48 tabs 68, the holes 70, and located in the driving flange 10 through holes 72 and engage in the assembled state through the through holes 72. The interlocking elements 100 on the drive shaft 16 are in introduced the positive locking elements 106 of the driving flange 10. Further, on the inner circumference of the drive plate 96, radially inwardly extending formations 134 are introduced into grooves 62 introduced on the outer circumference of the drive flange 10. The metal plate 48 and the drive plate 96 are secured to each other via the bolts 20 against rotation.

Die Mitnahmevorrichtung 12 wird auf der Antriebswelle 16 mit einer Schraube 74 gesichert. Das von einer Trennscheibe gebildete Einsatzwerkzeug 14 besitzt eine von einem separaten Bauteil gebildete, im Wesentlichen scheibenförmige Blechnabe 42, die in Umfangsrichtung 50, 52 hintereinander drei gleichmäßig verteilte, sich in axialer Richtung 54 erstreckende, napfförmige Ausnehmungen 76 aufweist, deren Durchmesser geringfügig größer sind als der Durchmesser der Bolzen 20. Ferner besitzt die Blechnabe 42 drei gleichmäßig in Umfangsrichtung 50, 52 verteilte, sich in Umfangsrichtung 50, 52 erstreckende Ausnehmungen 78, die jeweils einen schmalen und einen breiten Bereich 80, 82 aufweisen.The driving device 12 is secured to the drive shaft 16 with a screw 74. The insertion tool 14 formed by a cutting disk has a substantially disk-shaped sheet metal hub 42 formed by a separate component, which has three uniformly distributed, cup-shaped recesses 76 extending in the axial direction 54 in the circumferential direction 50, 52, whose diameters are slightly larger than The diameter of the bolts 20. Further, the sheet metal hub 42 has three evenly distributed in the circumferential direction 50, 52, extending in the circumferential direction 50, 52 recesses 78, each having a narrow and a wide range 80, 82.

Der Durchmesser der Zentrierbohrung 46 der Blechnabe 42 ist so gewählt, dass das Einsatzwerkzeug 14 auch mit einem herkömmlichen Spannsystem mit einem Spannflansch und einer Spindelmutter auf eine herkömmliche Winkelschleifmaschine aufgespannt werden kann. Es wird eine so genannte Abwärtskompatibilität sichergestellt.The diameter of the centering bore 46 of the sheet metal hub 42 is selected so that the insert tool 14 can be clamped with a conventional clamping system with a clamping flange and a spindle nut on a conventional angle grinder. It ensures a so-called backward compatibility.

Die Blechnabe 42 des Einsatzwerkzeugs 14 weist drei Formelemente 24 auf, die in Umfangsrichtung 50, 52 gleichmäßig über den Umfang der Zentrierbohrung 46 verteilt sind (Fig. 2). Die Formelemente 24 sind hierbei von Ausnehmungen gebildet.The sheet metal hub 42 of the insertion tool 14 has three mold elements 24 which are distributed in the circumferential direction 50, 52 uniformly over the circumference of the centering bore 46 (FIG. 2). The mold elements 24 are formed here by recesses.

Die Formelemente 22 der Werkzeugaufnahmevorrichtung und die Formelemente 24 des Einsatzwerkzeugs 14 sind aufeinander abgestimmte, korrespondierende Formelemente zur Vereinfachung einer Montage des Einsatzwerkzeugs 14. Ferner bilden die korrespondierenden Formelemente 22, 24 ein Codierungsmittel zur Vermeidung einer Montage eines unzulässigen Einsatzwerkzeugs derselben Art. Hierfür sind die korrespondierenden Formelemente 22, 24 hinsichtlich eines Durchmessers des Einsatzwerkzeugs 14 aufeinander abgestimmt, so dass Einsatzwerkzeuge für den Einsatz in Maschinen mit hoher Drehzahl ein breites Formelement bzw. eine breite Codierung aufweisen und Einsatzwerkzeuge für den Einsatz in Maschinen mit niederer Drehzahl ein schmales Formelement bzw. eine schmale Codierung.The mold elements 22 of the tool receiving device and the mold elements 24 of the insert tool 14 are matched, corresponding mold elements to simplify installation of the insert tool 14. Furthermore, the corresponding mold elements 22, 24 form a coding means for avoiding assembly of an impermissible insert tool For this purpose, the corresponding form elements 22, 24 with respect to a diameter of the insert tool 14 matched to each other, so that use tools for use in high-speed machines have a wide shape element or a wide coding and use tools for use in machines with low speed a narrow form element or a narrow coding.

Die Blechnabe 42 des Einsatzwerkzeugs 14 ist über eine Nietverbindung fest mit einem Schleifmittel verbunden und verpresst und ist durch eine in axialer Richtung 64 weisende Ausformung 44 napfförmig ausgeführt.The sheet metal hub 42 of the insert tool 14 is connected via a rivet connection firmly with an abrasive and pressed and is executed by a pointing in the axial direction 64 44 formation cup-shaped.

Bei einer Montage des Einsatzwerkzeugs 14 wird das Einsatzwerkzeug 14 mit seiner Zentrierbohrung 46 auf den die Formelemente 22 in axialer Richtung 54 überragenden Teil des Bunds 26 aufgeschoben und radial vorzentriert. Das Einsatzwerkzeug 14 kommt hierbei auf Anlageflächen 84 der Formelemente 22 zum Liegen. Ein Verdrehen des Einsatzwerkzeugs 14 in Umfangsrichtung 50, 52 bringt die Formelemente 22, 24 zur Deckung. Das Einsatzwerkzeug 14 bzw. die Blechnabe 42 kann anschließend in axialer Richtung 64 in Richtung der Anlagefläche 30 gleiten, und die Blechnabe 42 kommt auf den Bolzen 20 zum Liegen.When mounting the insert tool 14, the insert tool 14 is pushed with its center hole 46 on the mold elements 22 in the axial direction 54 superior part of the collar 26 and pre-centered radially. The insert tool 14 comes here to contact surfaces 84 of the mold elements 22 to lie. Twisting the insert tool 14 in the circumferential direction 50, 52 brings the mold elements 22, 24 to cover. The insert tool 14 or the sheet metal hub 42 can then slide in the axial direction 64 in the direction of the contact surface 30, and the sheet metal hub 42 comes to rest on the bolt 20.

Ein anschließendes Andrücken der Blechnabe 42 an die Anlagefläche 30 des Mitnahmeflansches 10 bewirkt, dass die Bolzen 20 in den Durchgangsbohrungen 72 und die Mitnehmerscheibe 96 gegen eine Federkraft des Federelements 18 auf der Antriebswelle 16 axial in die vom Einsatzwerkzeug 14 abgewandte Richtung 64 verschoben werden. Hierbei greifen radial nach außen gerichtete Ausformungen 86 der Mitnehmerscheibe 96 in entsprechende Arretiertaschen 88 eines fest mit dem Getriebegehäuse 38 verbundenen Lagerflansches 90 und arretieren die Antriebswelle 16.
Beim Niederdrücken der Blechnabe 42 auf die Anlagefläche 30 finden die Spannhaken 56 automatisch in die breiten Bereiche 82 der Ausnehmungen 78 in der Blechnabe 42.A subsequent pressing of the sheet metal hub 42 to the contact surface 30 of the driving flange 10 causes the bolts 20 are axially displaced in the through holes 72 and the drive plate 96 against the spring force of the spring member 18 on the drive shaft 16 in the direction away from the insert tool 14 64th Here, radially outwardly directed formations 86 of the drive plate 96 engage in corresponding Locking pockets 88 of a fixedly connected to the transmission housing 38 bearing flange 90 and lock the drive shaft sixteenth
Upon depression of the sheet metal hub 42 on the contact surface 30, the clamping hooks 56 are automatically in the wide areas 82 of the recesses 78 in the sheet metal hub 42nd

Sind die hakenförmigen Fortsätze der Spannhaken 56 durch die breiten Bereiche 82 der Ausnehmungen 78 der Blechnabe 42 geführt und ist die Blechnabe 42 vollständig niedergedrückt, kann die Blechnabe 42 entgegen einer Antriebsrichtung 98 verdreht werden. Das Verdrehen der Blechnabe 42 bewirkt zum einen, dass die Blechnabe 42 mit ihrem Rand der Zentrierbohrung 46 in den Abstand 28 zwischen den Formelementen 22 und der Anlagefläche 30 des Mitnahmeflansches 10 gleiten und von den Formelementen 22 in axialer Richtung gegen ein Herunterfallen gesichert werden kann. Zum anderen bewirkt das Verdrehen der Blechnabe 42, dass die hakenförmigen Fortsätze in die bogenförmigen, schmalen Bereiche 80 der Ausnehmungen 78 der Blechnabe 42 verschoben werden. Dabei wird die Blechplatte 48 mit den Spannhaken 56 durch nicht näher dargestellte Schrägflächen axial gegen den Druck der Blattfedereinheit 58 in Richtung 54 verschoben, bis Auflageflächen der hakenförmigen Fortsätze in den bogenförmigen, schmalen Bereichen 80 seitlich neben den Ausnehmungen 78 der Blechnabe 42 zur Anlage kommen. Zur Selbstreinigung sind in die Anlagefläche 30 des Mitnahmeflansches 10 bogenförmige Nuten 66 eingebracht, über die auf der Auflagefläche 30 liegende, ungewünschte Partikel nach außen aus der Mitnahmevorrichtung 12 befördert werden können.If the hook-shaped extensions of the clamping hooks 56 are guided through the wide regions 82 of the recesses 78 of the sheet metal hub 42 and the sheet metal hub 42 is completely depressed, the sheet metal hub 42 can be rotated counter to a drive direction 98. The rotation of the sheet metal hub 42, on the one hand, causes the sheet metal hub 42 to slide with its edge of the centering bore 46 into the distance 28 between the shaped elements 22 and the abutment surface 30 of the driving flange 10 and can be secured against falling down by the shaped elements 22 in the axial direction. On the other hand, the rotation of the sheet metal hub 42 causes the hook-shaped extensions to be displaced into the arcuate, narrow regions 80 of the recesses 78 of the sheet metal hub 42. In this case, the metal plate 48 is moved by the clamping hooks 56 by non-illustrated inclined surfaces axially against the pressure of the leaf spring unit 58 in the direction 54 until bearing surfaces of the hook-shaped projections in the arcuate, narrow areas 80 laterally adjacent to the recesses 78 of the sheet metal hub 42 come to rest. For self-cleaning arcuate grooves 66 are introduced into the contact surface 30 of the driving flange 10, on the lying on the support surface 30, unwanted particles can be conveyed to the outside of the driving device 12.

In einer Betriebsstellung des Einsatzwerkzeugs 14 bewirkt der Druck des Federelements 18, dass die Mitnehmerscheibe 96 nach oben gleitet. Die Bolzen 20 rasten in den napfförmigen Ausnehmungen 76 der Blechnabe 42 ein und sichern diese formschlüssig in Umfangsrichtung 50, 52. Gleichzeitig gelangen die Ausformungen 86 der Mitnehmerscheibe 96 mit den Arretiertaschen 88 des Lagerflansches 90 außer Eingriff und geben die Antriebswelle 16 frei.In an operating position of the insert tool 14 causes the pressure of the spring element 18 that the drive plate 96 slides upwards. The bolts 20 engage in the cup-shaped recesses 76 of the sheet metal hub 42 and secure them in a form-fitting manner in the circumferential direction 50, 52. At the same time reach the protrusions 86 of the drive plate 96 with the locking pockets 88 of the bearing flange 90 disengaged and give the drive shaft 16 free.

Zur Demontage des Einsatzwerkzeugs 14 wird eine Entriegelungstaste 92 in axiale Richtung 64 gedrückt. Die Entriegelungstaste 92 drückt die Mitnehmerscheibe 96 in axialer Richtung 64, und die Ausformungen 86 der Mitnehmerscheibe 96 kommen mit den Arretiertaschen 88 in Eingriff. Die Antriebswelle 16 ist arretiert. Die Bolzen 20 geraten hierbei mit den Ausnehmungen 76 der Blechnabe 42 außer Eingriff, und die Blechnabe 42 kann in Umfangsrichtung 52 gedreht werden, bis die Spannhaken 56 durch die Ausnehmungen 78 gleiten können. Die Formelemente 22, 24 gelangen hierbei in eine korrespondierende Lage, und die Blechnabe 42 kann in axialer Richtung 54 entnommen werden.To disassemble the insert tool 14, a release button 92 is pressed in the axial direction 64. The release button 92 pushes the drive plate 96 in the axial direction 64, and the formations 86 of the drive plate 96 come with the lock pockets 88 into engagement. The drive shaft 16 is locked. The bolts 20 are in this case with the recesses 76 of the sheet metal hub 42 disengaged, and the sheet metal hub 42 can be rotated in the circumferential direction 52 until the clamping hooks 56 can slide through the recesses 78. The mold elements 22, 24 in this case reach into a corresponding position, and the sheet metal hub 42 can be removed in the axial direction 54.

Bezugszeichenreference numeral

1010
Mitnahmeflanschdriving flange
1212
Mitnahmevorrichtungdriving device
1414
Einsatzwerkzeugapplication tool
1616
Antriebswelledrive shaft
1818
Federelementspring element
2020
Rastelementlocking element
2222
Formelementforming element
2424
Formelementforming element
2626
BundFederation
2828
Abstanddistance
3030
Anlageflächecontact surface
3232
Winkelschleifmaschineangle grinder
3434
Gehäusecasing
3636
Handgriffhandle
3838
Getriebegehäusegearbox
4040
Handgriffhandle
4242
Nabehub
4444
Ausformungformation
4646
Zentrierbohrungcentering
4848
Blechplattesheet metal plate
5050
Umfangsrichtungcircumferentially
5252
Umfangsrichtungcircumferentially
5454
axiale Richtungaxial direction
5656
Spannhakententerhook
5858
BlattfedereinheitLeaf spring unit
6060
Ausnehmungrecess
6262
Nutgroove
6464
axiale Richtungaxial direction
6666
Nutgroove
6868
Lascheflap
7070
Bohrungdrilling
7272
DurchgangsbohrungThrough Hole
7474
Schraubescrew
7676
Ausnehmungrecess
7878
Ausnehmungrecess
8080
BereichArea
8282
BereichArea
8484
Anlageflächecontact surface
8686
Ausformungformation
8888
ArretiertascheArretiertasche
9090
LagerflanschLagerflansch
9292
Entriegelungstasterelease
9494
Schrägflächesloping surface
9696
Mitnehmerscheibedriver disc
9898
Antriebsrichtungdriving direction
100100
FormschlusselementForm-fitting element
102102
Längenerstreckunglongitudinal extension
104104
Höheheight
106106
FormschlusselementForm-fitting element
108108
Distanzelementspacer
110110
Federstegspring bar
112112
Anschlussstegconnecting web
114114
Halteringretaining ring
116116
EndeThe End
118118
EndeThe End
120120
Breitewidth
122122
Auflageflächebearing surface
124124
Auflageflächebearing surface
126126
StärkeStrength
128128
Codierungsmittelencoding means
130130
BundFederation
132132
Übergangcrossing
134134
Ausformungformation
136136
Innengewindeinner thread

Claims (12)

  1. Tool receiving device for a machine tool (14), comprising an at least essentially disc-shaped hub (42), in particular for a hand-guided angle grinder (32) or a hand-held circular saw, with a drive shaft (16) and a carry-along device (12) which has at least one latching element (20), which is mounted movably counter to a spring element (18), for the interlocking fixing of the machine tool (14) in the circumferential direction (50, 52), characterized in that the drive shaft (16) has at least one interlocking element (100), which is integrally formed on it without cutting, for the interlocking connection in the circumferential direction (50, 52) to a means of the carry-along device (12) for the transmission of driving torque.
  2. Tool receiving device according to Claim 1, characterized in that the interlocking element (100) is integrally formed on the drive shaft (16) by means of a pressing operation.
  3. Tool receiving device according to one of the preceding claims, characterized in that the interlocking element (100) has a greater length extent (102) in the axial direction (64) of the drive shaft (16) than height (104).
  4. Tool receiving device according to one of the preceding claims, characterized in that the drive shaft (16) has at least three interlocking elements (100).
  5. Tool receiving device according to one of the preceding claims, characterized in that the inner circumference of the means of the carry-along device (12) has at least one continuous axial groove forming an interlocking element (106).
  6. Tool receiving device according to one of the preceding claims, characterized in that the means of the carry-along device (12) is formed by a sintered part.
  7. Tool receiving device according to one of the preceding claims, characterized in that the means of the carry-along device (12) is formed by a carry-along flange (10) forming a contact surface (30) for the machine tool (14).
  8. Tool receiving device according to one of the preceding claims, characterized in that the means of the carry-along device (12) is supported on the drive shaft (16) via a spacer element (108).
  9. Tool receiving device according to Claim 8, characterized in that the spacer element (108) is formed by a sleeve.
  10. Tool receiving device according to one of the preceding claims, characterized in that the carry-along device (12) comprises a leaf spring unit (58) which has a free spring web (110) extending at least partially in the circumferential direction (50, 52) and via which the machine tool (14) can be fixed in the axial direction (64) by a spring force.
  11. Angle grinder with a tool receiving device according to one of the preceding claims.
  12. Hand-held circular saw with a tool receiving device according to one of the preceding claims.
EP04786843A 2003-11-08 2004-09-24 Tool receiving device for a machine tool, comprising an at least essentially disk-shaped hub Expired - Fee Related EP1684944B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10352291A DE10352291A1 (en) 2003-11-08 2003-11-08 Tool receiving device for an insert tool with an at least substantially disc-shaped hub
PCT/DE2004/002127 WO2005049275A1 (en) 2003-11-08 2004-09-24 Tool receiving device for a machine tool, comprising an at least essentially disk-shaped hub

Publications (2)

Publication Number Publication Date
EP1684944A1 EP1684944A1 (en) 2006-08-02
EP1684944B1 true EP1684944B1 (en) 2008-01-30

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EP04786843A Expired - Fee Related EP1684944B1 (en) 2003-11-08 2004-09-24 Tool receiving device for a machine tool, comprising an at least essentially disk-shaped hub

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US (1) US7497766B2 (en)
EP (1) EP1684944B1 (en)
CN (1) CN1878635A (en)
DE (2) DE10352291A1 (en)
WO (1) WO2005049275A1 (en)

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Also Published As

Publication number Publication date
CN1878635A (en) 2006-12-13
WO2005049275A1 (en) 2005-06-02
DE502004006112D1 (en) 2008-03-20
US20070082590A1 (en) 2007-04-12
US7497766B2 (en) 2009-03-03
EP1684944A1 (en) 2006-08-02
DE10352291A1 (en) 2005-06-02

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