EP1701820B1 - Hand machine tool with clamping device - Google Patents

Hand machine tool with clamping device Download PDF

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Publication number
EP1701820B1
EP1701820B1 EP04798140.2A EP04798140A EP1701820B1 EP 1701820 B1 EP1701820 B1 EP 1701820B1 EP 04798140 A EP04798140 A EP 04798140A EP 1701820 B1 EP1701820 B1 EP 1701820B1
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EP
European Patent Office
Prior art keywords
clamping
flange
portable power
power tool
planes
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
EP04798140.2A
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German (de)
French (fr)
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EP1701820A1 (en
Inventor
Juergen Hesse
Eike Von Specht
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of EP1701820A1 publication Critical patent/EP1701820A1/en
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Publication of EP1701820B1 publication Critical patent/EP1701820B1/en
Expired - Fee Related legal-status Critical Current
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/20—Mountings for the wheels

Definitions

  • the present invention is based on a hand tool according to the preamble of claim 1.
  • the EP 495 181 A1 discloses a hand tool with a clamping device for clamping disc-shaped tools of different thickness on at least one flange by means of a tool passing through the tool.
  • the present invention with the characteristics of claim 1 has the advantage that with the power tool of different strengths, disk-shaped tools without time-consuming adjustments can be tensioned without complex adjustments.
  • one of the flanges has at least two different clamping planes, with which it is changeable and / or selectable with respect to the clamping means in support position and in this position against the tool can be clamped, the commercially available different thickness disc-shaped tools always the right one Clamping be assigned without adjustment effort. This ensures that both tools with maximum and minimum strength can always be tensioned with sufficient clamping force on the hand tool machine.
  • the clamping means has three clamping tabs which are supported against a corresponding support edge of a flange, relatively large clamping forces can be transmitted.
  • FIG. 1 shows a designed as an angle grinder hand tool 10 in longitudinal section.
  • the hand tool 10 consists of an elongated motor housing 12, to which a downwardly angled gear housing 14 is flanged.
  • the motor housing 12 carries a motor 16, the motor shaft 18 projects into the transmission housing 14.
  • the motor gear 18 forms a bevel gear 22 together with a ring gear 24, an angular gear 20.
  • the ring gear 24 rotatably surrounds an output shaft 26, which in turn rotatably at its end a disc-shaped tool in the form of a grinding wheel 27 carries ,
  • the grinding wheel 27 is guided with a central, unspecified recess over the free end of the output shaft 26 and secured thereto replaceable tensioning. It is supported on the machine side centered on the centering collar 31 of a support flange 30 from the rotationally fixed and axially secured to a stepped collar 28 of the output shaft 26 is seated.
  • a clamping flange 32 is supported on the grinding wheel 27. This is in the viewing direction left - shown in half - with its front side 570 directed outwards and facing with its back 590 of the grinding wheel 27. In this position, the clamping flange 32 is provided for receiving grinding wheels 27 of great strength of about 5 mm and helps the clamping system to optimal, installed by the installed in the upper region of the gear housing 14 designed as disc springs tension springs 40 applied clamping force.
  • the clamping flange 32 In the direction of looking to the right, the clamping flange 32, which is only half shown again, is directed outwards with its rear side 590 and faces the grinding wheel 27 with its front side 570. In this position, the clamping flange 32 is provided for receiving grinding wheels 27 minimum thickness of about 0.8 mm and helps the clamping system to optimal clamping force, which installed by the top of the gear housing 14 as - via a snap ring 42 axially secured plate spring package - Designed tension springs 40 is applied in the region of the upper Switzerlandspindelendes 38.
  • the clamping flange 32 is penetrated in its center hole 54 from the clamping shank 35 of a belonging to a pulling spindle 34, mushroom-shaped clamping head 36, which is externally supported by a flat clamping surface 37 on the clamping edge 56 of the clamping flange 32.
  • the clamping head 36 and the center hole 54 have a corresponding, star-shaped configuration in the manner of a key-keyhole or bayonet system, in which, after insertion and subsequent rotation, a cross-axial support of the parts takes place against each other, which will be described in more detail below.
  • upper Switzerlandspindelende 38 is a roller bearing support ball 39 is arranged as a wear protection on which a clamping lever 44 is supported with its eccentric 46 when it is pivoted to loosen the grinding wheel 27 about its pivot axis 48 and thereby pushes the pull spindle 34 down.
  • this can be rotated so that its star-shaped recesses 68 at the edge of the central hole 54 with the radial radial clamping tabs 66 (FIG. FIG. 8 ) of the clamping head 36 and then the clamping flange 32 and then the grinding wheel 27 can be removed axially from the angle grinder 10.
  • the configured as a hollow shaft working shaft 26 is centrally pass through the tension spindle 34 and is rotatably supported in each case in an upper and a lower spindle bearings 50, 52.
  • FIG. 2 The in FIG. 2
  • the clamping flange 32 shown by its front side 570 reveals the circular center hole 54, which is penetrated radially outwards by three star-shaped recesses 68 extending beyond it.
  • the clamping edge 56 can be seen, which extends like a ring - with the difference in diameter of the recesses 68 and the center hole 54 -.
  • the clamping edge 56 of the clamping flange 32 is regularly interrupted by three recesses 68 and forms three support tabs 55, on the front side 570 two first step-like clamping planes 57, 58 and on the back 590 two further step-like clamping planes 59, 60, where the three Clamping tabs 66 of the clamping head 36 can be supported with their flat clamping surface 37 after corresponding rotation of the clamping flange 32 relative to the clamping head 36.
  • the clamping flange has four different clamping planes, with which all commercially available grinding wheels on the angle grinder 10 with little effort safely clamped.
  • the clamping flange 32 has on its front side 570 a circumferential, narrow marking groove 33 a and on its rear side 590 (FIG. Fig. 11 ) Have a circumferential wide Mark istsnut 33 b, with which the front and back 570, 590 are easily distinguishable.
  • FIGS. 3, 4 . 5 and 6 show a section of the lower portion of the output shaft 26 with the support flange 30, the clamping flange 32 and the clamping head 36, wherein in FIG. 3 the clamping flange 32 with its front side 570 and its first support surface 62 is supported on a minimal thin grinding wheel 27 and this securely clamped.
  • the clamping head 36 is supported with its clamping surface 37 against the axially outermost positioned clamping surfaces 57, so that the optimal clamping force between the support and clamping flange 30, 32 at a gap width range of about 0.7 to 1.7 mm.
  • FIG. 4 is different from FIG. 3 the clamping head 35 is supported against the axially inner clamping plane 58, so that the optimum clamping force between the support and clamping flange 30, 32 at a gap width of about 1.7 to 2.8 mm.
  • FIG. 5 in contrast to FIGS. 3 and 4 the clamping flange 32 with its back 590 and its second support surface 64 on a less thin grinding wheel 27 from and clamps them safely.
  • the clamping head 36 is supported against the axially outer clamping plane 59, so that the optimal clamping force between support and clamping flange 30, 32 at a gap width of about 2.9 to 4 mm.
  • FIG. 6 supports, as in FIG. 5 the clamping flange 32 with its rear side 590 or its second support surface 64 on a stronger grinding wheel 27 from and clamps them safely.
  • the clamping head 36 is supported against the axially inner clamping plane 60, so that the optimal clamping force between the support and clamping flange 30, 32 at a gap width of about 4 to 5.1 mm.
  • FIG. 7 shows the Buchspindel 34 as a detail, with particular clarity of the clamping shaft 35, the clamping head 36, the clamping surface 37 and the radial clamping tabs 66 can be seen, which lie within a common mushroom-shaped contour.
  • FIG. 8 shows the front side of the tension spindle 34, wherein the cylindrical shape and the radial clamping tabs 66 - corresponding to the radial recesses 68 of the clamping flange 32 and desen center hole 54 - is clear.
  • FIG. 9 shows a cross section of the clamping flange 32 with the pulling spindle 34th

Description

Die vorliegende Erfindung geht aus von einer Handwerkzeugmaschine nach dem Oberbegriff des Anspruchs 1.The present invention is based on a hand tool according to the preamble of claim 1.

Aus der EP 495 181 A1 ist eine Handwerkzeugmaschine nach dem Oberbegriff des Anspruchs 1 bekannt. Die EP 495 181 A1 offenbart eine Handwerkzeugmaschine mit einer Spanneinrichtung zum Spannen scheibenförmiger Werkzeuge unterschiedlicher Stärke an mindestens einem Flansch mittels eines das Werkzeug durch tretenden Spannmittels.From the EP 495 181 A1 a hand tool according to the preamble of claim 1 is known. The EP 495 181 A1 discloses a hand tool with a clamping device for clamping disc-shaped tools of different thickness on at least one flange by means of a tool passing through the tool.

Das Anpassen des Spannhubs ist dabei umständlich und zeitaufwändig.The adjustment of the clamping stroke is cumbersome and time consuming.

Vorteile der ErfindungAdvantages of the invention

Die vorliegende Erfindung mit den Kennzeichen des Anspruchs 1 hat den Vorteil, dass mit der Handwerkzeugmaschine unterschiedlich starke, scheibenförmige Werkzeuge ohne aufwändige Justierungen besonders Zeit sparend spannbar sind.The present invention with the characteristics of claim 1 has the advantage that with the power tool of different strengths, disk-shaped tools without time-consuming adjustments can be tensioned without complex adjustments.

indem einer der Flansche mindestens zwei unterschiedliche Spannebenen hat, mit denen er wechselbar und/oder wählbar gegenüber dem Spannmittel in Abstützposition und in dieser Position gegen das Werkzeug spannbar ist, kann den handelsüblichen unterschiedlich starken scheibenförmigen Werkzeugen stets das passende Spannmittel ohne Justieraufwand zugeordnet werden. Dadurch ist gesichert, dass sowohl Werkzeuge mit maximaler als auch mit minimaler Stärke immer mit ausreichender Spannkraft an der Handwerkzeugmaschine spannbar sind.By one of the flanges has at least two different clamping planes, with which it is changeable and / or selectable with respect to the clamping means in support position and in this position against the tool can be clamped, the commercially available different thickness disc-shaped tools always the right one Clamping be assigned without adjustment effort. This ensures that both tools with maximum and minimum strength can always be tensioned with sufficient clamping force on the hand tool machine.

Dadurch, dass das Spannmittel drei Spannlappen hat, die sich gegen einen entsprechenden Stützrand des einen Flanschs abstützen, können verhältnismäßig große Spannkräfte übertragen werden.Characterized in that the clamping means has three clamping tabs which are supported against a corresponding support edge of a flange, relatively large clamping forces can be transmitted.

Dadurch, dass der Flansch auf seiner Vorderseite und auf seiner Rückseite jeweils zwei Stützränder mit je einer unterschiedlichen Ebene bildet, stehen mit den Flansch insgesamt vier Stützebenen zur Verfügung, mit denen alle handelsüblichen scheibenförmigen Werkzeuge spannbar sind.The fact that the flange forms on its front side and on its back each two support edges, each with a different level, are available with the flange a total of four support levels available with which all commercially available disc-shaped tools can be tensioned.

Zeichnungendrawings

Nachstehend wird die Erfindung anhand eines Ausführungsbeispiels mit zugehöriger Zeichnung näher erläutert.
Es zeigen

  • Figur 1 einen Längsschnitt der Handwerkzeugmaschine
  • Figur 2 eine Draufsicht der Vorderseite des Spannflansches
  • Figur 3 einen ersten Längsschnitt des Spannflansches in einer ersten Spannposition
  • Figur 4 einen zweiten Längsschnitt des Spannflansches in einer zweiten Spannposition
  • Figur 5 einen dritten Längsschnitt des Spannflansches in einer dritten Spannposition
  • Figur 6 einen vierten Längsschnitt des Spannflansches in einer vierten Spannposition
  • Figur 7 die Einzelheit einer Zugspindel
  • Figur 8 die Einzelheit des Spannmittels
  • Figur 9 einen Querschnitt des Spannmittels mit dem Spannflansch
  • Figur 10 den Querschnitt des Spannmittels als Einzelheit.
  • Figur 11 eine Draufsicht der Rückseite des Spannflansches
The invention will be explained in more detail with reference to an embodiment with associated drawing.
Show it
  • FIG. 1 a longitudinal section of the power tool
  • FIG. 2 a plan view of the front of the clamping flange
  • FIG. 3 a first longitudinal section of the clamping flange in a first clamping position
  • FIG. 4 a second longitudinal section of the clamping flange in a second clamping position
  • FIG. 5 a third longitudinal section of the clamping flange in a third clamping position
  • FIG. 6 a fourth longitudinal section of the clamping flange in a fourth clamping position
  • FIG. 7 the detail of a tractor spindle
  • FIG. 8 the detail of the clamping device
  • FIG. 9 a cross section of the clamping device with the clamping flange
  • FIG. 10 the cross section of the clamping device as a detail.
  • FIG. 11 a plan view of the back of the clamping flange

Ausführungsbeispielembodiment

Figur 1 zeigt eine als Winkelschleifer ausgestaltete Handwerkzeugmaschine 10 in Längsschnitt. Die Handwerkzeugmaschine 10 besteht aus einem länglichen Motorgehäuses 12, an das ein nach unten abgewinkeltes Getriebegehäuse 14 angeflanscht ist. Das Motorgehäuses 12 trägt einen Motor 16, dessen Motorwelle 18 in das Getriebegehäuse 14 ragt. Das Ende der Motorwelle 18 trägt ein als Kegelzahnrad ausgestaltetes Motorritzel 22. Das Motorritzel 22 bildet gemeinsam mit einem Tellerrad 24 ein Winkelgetriebe 20. Das Tellerrad 24 umgreift drehfest eine Abtriebswelle 26, die ihrerseits an ihrem Ende drehfest ein scheibenförmiges Werkzeug in Form einer Schleifscheibe 27 trägt. Die Schleifscheibe 27 ist mit einer zentrischen, nicht näher bezeichneten Ausnehmung über das freie Ende der Abtriebswelle 26 geführt und daran auswechselbar spannbar befestigt. Sie stützt sich dabei maschinenseitig zentriert am Zentrierbund 31 eines Stützflansches 30 ab, der drehfest und axial gesichert an einem Stufenbund 28 der Abtriebswelle 26 sitzt. FIG. 1 shows a designed as an angle grinder hand tool 10 in longitudinal section. The hand tool 10 consists of an elongated motor housing 12, to which a downwardly angled gear housing 14 is flanged. The motor housing 12 carries a motor 16, the motor shaft 18 projects into the transmission housing 14. The motor gear 18 forms a bevel gear 22 together with a ring gear 24, an angular gear 20. The ring gear 24 rotatably surrounds an output shaft 26, which in turn rotatably at its end a disc-shaped tool in the form of a grinding wheel 27 carries , The grinding wheel 27 is guided with a central, unspecified recess over the free end of the output shaft 26 and secured thereto replaceable tensioning. It is supported on the machine side centered on the centering collar 31 of a support flange 30 from the rotationally fixed and axially secured to a stepped collar 28 of the output shaft 26 is seated.

Von der maschinenfernen Seite bzw. von außen stützt sich an der Schleifscheibe 27 ein Spannflansch 32 ab. Dieser ist in Betrachtungsrichtung links - hälftig dargestellt - mit seiner Vorderseite 570 nach außen gerichtet und mit seiner Rückseite 590 der Schleifscheibe 27 zugewandt. In dieser Position ist der Spannflansch 32 zur Aufnahme von Schleifscheiben 27 großer Stärke von etwa 5 mm vorgesehen und verhilft dem Spannsystem zu optimaler, von den im oberen Bereich des Getriebegehäuses 14 installierten als Tellerfedern ausgestalteten Spannfedern 40 aufgebrachter Spannkraft.From the machine-distant side or from the outside, a clamping flange 32 is supported on the grinding wheel 27. This is in the viewing direction left - shown in half - with its front side 570 directed outwards and facing with its back 590 of the grinding wheel 27. In this position, the clamping flange 32 is provided for receiving grinding wheels 27 of great strength of about 5 mm and helps the clamping system to optimal, installed by the installed in the upper region of the gear housing 14 designed as disc springs tension springs 40 applied clamping force.

In Betrachtungsrichtung rechts ist der widerum nur hälftig dargestellte Spannflansch 32 mit seiner Rückseite 590 nach außen gerichtet und mit seiner Vorderseite 570 der Schleifscheibe 27 zugewandt. In dieser Position ist der Spannflansch 32 zur Aufnahme von Schleifscheiben 27 minimaler Stärke von etwa 0,8 mm vorgesehen und verhilft dem Spannsystem auch dann zu optimaler Spannkraft, die von den im oberen Bereich des Getriebegehäuses 14 installierten als - über einen Sprengring 42 axial gesicherten Tellerfederpaket - ausgestalteten Spannfedern 40 im Bereich des oberen Zugspindelendes 38 aufgebracht wird.In the direction of looking to the right, the clamping flange 32, which is only half shown again, is directed outwards with its rear side 590 and faces the grinding wheel 27 with its front side 570. In this position, the clamping flange 32 is provided for receiving grinding wheels 27 minimum thickness of about 0.8 mm and helps the clamping system to optimal clamping force, which installed by the top of the gear housing 14 as - via a snap ring 42 axially secured plate spring package - Designed tension springs 40 is applied in the region of the upper Zugspindelendes 38.

Der Spannflansch 32 wird in seinem Mittenloch 54 vom Spannschaft 35 eines zu einer Zugspindel 34 gehörenden, pilzförmigen Spannkopfes 36 durchgriffen, der sich außen mit einer ebenen Spannfläche 37 am Spannrand 56 des Spannflansches 32 abstützt. Der Spannkopf 36 und das Mittenloch 54 haben eine miteinander korrespondierende, sternfömige Ausgestaltung in der Art eines Schlüssel-Schlüsselloch- bzw. Bajonett-Systems, bei dem nach Durchstecken und anschließendem Drehen eine hintergreifende axiale Abstützung der Teile gegeneinander erfolgt, die weiter nachfolgend näher beschrieben wird.The clamping flange 32 is penetrated in its center hole 54 from the clamping shank 35 of a belonging to a pulling spindle 34, mushroom-shaped clamping head 36, which is externally supported by a flat clamping surface 37 on the clamping edge 56 of the clamping flange 32. The clamping head 36 and the center hole 54 have a corresponding, star-shaped configuration in the manner of a key-keyhole or bayonet system, in which, after insertion and subsequent rotation, a cross-axial support of the parts takes place against each other, which will be described in more detail below.

Am äußersten, oberen Zugspindelende 38 ist als Verschleißschutz eine Wälzlager-Stützkugel 39 angeordnet, an der sich ein Spannhebel 44 mit seinem Exzenterbereich 46 abstützt, wenn er zum Lösen der Schleifscheibe 27 um seine Schwenkachse 48 geschwenkt wird und dabei die Zugspindel 34 nach unten drückt. Ist in der Löseposition der Spannkopf 36 vom Spannflansch 32 axial gelöst, kann dieser so verdreht werden, dass sich dessen sternförmige Ausnehmungen 68 am Rand des Mittenlochs 54 mit den sternförmigen radialen Spannlappen 66 (Figur 8) des Spannkopfs 36 decken und daraufhin der Spannflansch 32 und sodann die Schleifscheibe 27 axial vom Winkelschleifer 10 entnommen werden können.At the extreme, upper Zugspindelende 38 is a roller bearing support ball 39 is arranged as a wear protection on which a clamping lever 44 is supported with its eccentric 46 when it is pivoted to loosen the grinding wheel 27 about its pivot axis 48 and thereby pushes the pull spindle 34 down. Is in the release position of the clamping head 36 axially released from the clamping flange 32, this can be rotated so that its star-shaped recesses 68 at the edge of the central hole 54 with the radial radial clamping tabs 66 (FIG. FIG. 8 ) of the clamping head 36 and then the clamping flange 32 and then the grinding wheel 27 can be removed axially from the angle grinder 10.

Die als Hohlwelle ausgestaltete Arbeitswelle 26 wird durch die Zugspindel 34 zentral durchtreten und ist jeweils in einem oberen und einem unteren Spindellager 50, 52 drehbar gelagert.The configured as a hollow shaft working shaft 26 is centrally pass through the tension spindle 34 and is rotatably supported in each case in an upper and a lower spindle bearings 50, 52.

Der in Figur 2 von seiner Vorderseite 570 gezeigte Spannflansch 32 läßt das kreisrunde Mittenloch 54 erkennen, das von drei darüber hinausgehenden, sternförmigen Ausnehmungen 68 radial nach außen durchbrochen ist. Außerdem ist der Spannrand 56 erkennbar, der sich ringartig - mit dem Differenzdurchmesser der Ausnehmungen 68 und des Mittenlochs 54 - erstreckt.The in FIG. 2 The clamping flange 32 shown by its front side 570 reveals the circular center hole 54, which is penetrated radially outwards by three star-shaped recesses 68 extending beyond it. In addition, the clamping edge 56 can be seen, which extends like a ring - with the difference in diameter of the recesses 68 and the center hole 54 -.

Der Spannrand 56 des Spannflansches 32 ist regelmäßig durch drei Ausnehmungen 68 unterbrochen und bildet drei Stützlappen 55, die auf der Vorderseite 570 zwei erste stufenartige Spannebenen 57, 58 und auf der Rückseite 590 zwei weitere stufenartige Spannebenen 59, 60 aufweisen, an denen sich die drei Spannlappen 66 des Spannkopfes 36 mit ihrer ebenen Spannfläche 37 nach entsprechender Drehung des Spannflansches 32 gegenüber dem Spannkopf 36 abstützen können. Dadurch hat der Spannflansch vier unterschiedliche Spannebenen, mit denen alle handelsüblichen Schleifscheiben am Winkelschleifer 10 mit geringem Aufwand sicher spannbar sind.The clamping edge 56 of the clamping flange 32 is regularly interrupted by three recesses 68 and forms three support tabs 55, on the front side 570 two first step-like clamping planes 57, 58 and on the back 590 two further step-like clamping planes 59, 60, where the three Clamping tabs 66 of the clamping head 36 can be supported with their flat clamping surface 37 after corresponding rotation of the clamping flange 32 relative to the clamping head 36. As a result, the clamping flange has four different clamping planes, with which all commercially available grinding wheels on the angle grinder 10 with little effort safely clamped.

Der Spannflansch 32 weist auf seiner Vorderseite 570 eine umlaufende, schmale Markierungsnut 33 a und auf seiner Rückseite 590 (Fig. 11) eine umlaufende breite Markierungsnut 33 b auf, mit denen Vorder- und Rückseite 570, 590 leicht unterscheidbar sind.The clamping flange 32 has on its front side 570 a circumferential, narrow marking groove 33 a and on its rear side 590 (FIG. Fig. 11 ) Have a circumferential wide Markierungsnut 33 b, with which the front and back 570, 590 are easily distinguishable.

Die Figuren 3, 4, 5 und 6 zeigen einen Ausschnitt des unteren Bereichs der Abtriebswelle 26 mit dem Stützflansch 30, dem Spannflansch 32 und dem Spannkopf 36, wobei in Figur 3 der Spannflansch 32 mit seiner Vorderseite 570 bzw. seiner ersten Stützfläche 62 sich an einer minimal dünnen Schleifscheibe 27 abstützt und diese sicher spannt. Dabei stützt sich der Spannkopf 36 mit seiner Spannfläche 37 gegen die axial am weitesten nach außen positionierte Spanneben 57, so dass die optimale Spannkraft zwischen Stütz- und Spannflansch 30, 32 bei einem Spaltbreitenbereich von etwa 0,7 bis 1,7 mm besteht.The FIGS. 3, 4 . 5 and 6 show a section of the lower portion of the output shaft 26 with the support flange 30, the clamping flange 32 and the clamping head 36, wherein in FIG. 3 the clamping flange 32 with its front side 570 and its first support surface 62 is supported on a minimal thin grinding wheel 27 and this securely clamped. In this case, the clamping head 36 is supported with its clamping surface 37 against the axially outermost positioned clamping surfaces 57, so that the optimal clamping force between the support and clamping flange 30, 32 at a gap width range of about 0.7 to 1.7 mm.

In Figur 4 ist im Unterschied zu Figur 3 der Spannkopf 35 gegen die axial innere Spannebene 58 gestützt, so dass die optimale Spannkraft zwischen Stütz- und Spannflansch 30, 32 bei einer Spaltbreite von etwa 1,7 bis 2,8 mm besteht.In FIG. 4 is different from FIG. 3 the clamping head 35 is supported against the axially inner clamping plane 58, so that the optimum clamping force between the support and clamping flange 30, 32 at a gap width of about 1.7 to 2.8 mm.

In Figur 5 stüzt sich im Unterschied zu Figur 3 und 4 der Spannflansch 32 mit seiner Rückseite 590 bzw. seiner zweiten Stützfläche 64 an einer weniger dünnen Schleifscheibe 27 ab und spannt diese sicher. Der Spannkopf 36 stützt sich dabei gegen die axial äußere Spannebene 59, so dass die optimale Spannkraft zwischen Stütz- und Spannflansch 30, 32 bei einer Spaltbreite von etwa 2,9 bis 4 mm besteht.In FIG. 5 in contrast to FIGS. 3 and 4 the clamping flange 32 with its back 590 and its second support surface 64 on a less thin grinding wheel 27 from and clamps them safely. The clamping head 36 is supported against the axially outer clamping plane 59, so that the optimal clamping force between support and clamping flange 30, 32 at a gap width of about 2.9 to 4 mm.

In Figur 6 stützt sich, wie in Figur 5 der Spannflansch 32 mit seiner Rückseite 590 bzw. seiner zweiten Stützfläche 64 an einer stärkeren Schleifscheibe 27 ab und spannt diese sicher. Der Spannkopf 36 stützt sich dabei gegen die axial innere Spannebene 60, so dass die optimale Spannkraft zwischen Stütz- und Spannflansch 30, 32 bei einer Spaltbreite von etwa 4 bis 5,1 mm besteht.In FIG. 6 supports, as in FIG. 5 the clamping flange 32 with its rear side 590 or its second support surface 64 on a stronger grinding wheel 27 from and clamps them safely. The clamping head 36 is supported against the axially inner clamping plane 60, so that the optimal clamping force between the support and clamping flange 30, 32 at a gap width of about 4 to 5.1 mm.

Figur 7 zeigt die Zugspindel 34 als Einzelheit, wobei besonders deutlich der Spannschaft 35, der Spannkopf 36, die Spannfläche 37 und die radialen Spannlappen 66 erkennbar sind, die innerhalb einer gemeinsamen pilzkopfförmigen Kontur liegen. FIG. 7 shows the Zugspindel 34 as a detail, with particular clarity of the clamping shaft 35, the clamping head 36, the clamping surface 37 and the radial clamping tabs 66 can be seen, which lie within a common mushroom-shaped contour.

Figur 8 zeigt die Stirnseite der Zugspindel 34, wobei deren zylindrische Gestalt und die der radialen Spannlappen 66 - korrespondierend zu den radialen Ausnehmungen 68 des Spannflansches 32 bzw. desen Mittenlochs 54 - deutlich wird. FIG. 8 shows the front side of the tension spindle 34, wherein the cylindrical shape and the radial clamping tabs 66 - corresponding to the radial recesses 68 of the clamping flange 32 and desen center hole 54 - is clear.

Figur 9 zeigt einen Querschnitt des Spannflansches 32 mit der Zugspindel 34 FIG. 9 shows a cross section of the clamping flange 32 with the pulling spindle 34th

Claims (4)

  1. Portable power tool (10) having a clamping device (30, 32, 34, 36, 44) for clamping disc-like tools (27) of varying thickness to at least one flange (30, 32) by means of a clamping means (36) passing through the tool (27), wherein the clamping means (36) and one of the flanges (32) are designed in accordance with the key-and-keyhole principle such that, after the passage of one through the other and subsequent twisting with respect to one another, they secure one another axially in at least one axial direction, characterized in that at least one of the flanges (32) has at least two different clamping planes (57, 58, 59, 60), with which it is clampable interchangeably and/or selectably with respect to the clamping means (36) in the supporting position and against the tool (27) in this position, wherein the different clamping planes (57, 58, 59, 60) define clamping positions for disc-like tools (27) of varying thickness.
  2. Portable power tool according to Claim 1 to 3, characterized in that at least two clamping planes (57, 58, 59, 60) are arranged both on the front side (570) and on the rear side (590) of the clamping flange (32).
  3. Portable power tool according to Claim 1 to 3, characterized in that the clamping means (36) has three clamping lugs (66) which are assigned to corresponding support lugs (55) of the clamping flange (32).
  4. Portable power tool according to Claim 1 to 3, characterized in that the clamping flange (32) has radial cutouts (68) which are substantially congruent with the clamping lugs (66) of the clamping means (36) and are slightly larger.
EP04798140.2A 2003-12-30 2004-11-02 Hand machine tool with clamping device Expired - Fee Related EP1701820B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10361810A DE10361810A1 (en) 2003-12-30 2003-12-30 Hand tool with clamping device
PCT/EP2004/052759 WO2005063439A1 (en) 2003-12-30 2004-11-02 Hand machine tool with clamping device

Publications (2)

Publication Number Publication Date
EP1701820A1 EP1701820A1 (en) 2006-09-20
EP1701820B1 true EP1701820B1 (en) 2015-09-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04798140.2A Expired - Fee Related EP1701820B1 (en) 2003-12-30 2004-11-02 Hand machine tool with clamping device

Country Status (5)

Country Link
US (1) US7207873B2 (en)
EP (1) EP1701820B1 (en)
CN (1) CN1902029B (en)
DE (1) DE10361810A1 (en)
WO (1) WO2005063439A1 (en)

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Also Published As

Publication number Publication date
US7207873B2 (en) 2007-04-24
CN1902029B (en) 2011-08-31
EP1701820A1 (en) 2006-09-20
DE10361810A1 (en) 2005-07-28
US20060172669A1 (en) 2006-08-03
WO2005063439A1 (en) 2005-07-14
CN1902029A (en) 2007-01-24

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