EP2062698B1 - Hand tool machine with striking tool holder - Google Patents

Hand tool machine with striking tool holder Download PDF

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Publication number
EP2062698B1
EP2062698B1 EP08105656.6A EP08105656A EP2062698B1 EP 2062698 B1 EP2062698 B1 EP 2062698B1 EP 08105656 A EP08105656 A EP 08105656A EP 2062698 B1 EP2062698 B1 EP 2062698B1
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EP
European Patent Office
Prior art keywords
hand tool
holding sleeve
machine according
radially
tool machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP08105656.6A
Other languages
German (de)
French (fr)
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EP2062698A1 (en
Inventor
Alexander Cycon
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.)
Hilti AG
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Hilti AG
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Filing date
Publication date
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Publication of EP2062698A1 publication Critical patent/EP2062698A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/02—Percussive tool bits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
    • B25D17/084—Rotating chucks or sockets
    • B25D17/088—Rotating chucks or sockets with radial movable locking elements co-operating with bit shafts specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/003—Details relating to chucks with radially movable locking elements
    • B25D2217/0034—Details of shank profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/003—Details relating to chucks with radially movable locking elements
    • B25D2217/0038—Locking members of special shape
    • B25D2217/0042—Ball-shaped locking members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/365—Use of seals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17042—Lost motion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17042—Lost motion
    • Y10T279/17094—Sleeve type retainer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17666—Radially reciprocating jaws
    • Y10T279/17692—Moving-cam actuator
    • Y10T279/17743—Reciprocating cam sleeve
    • Y10T279/17752—Ball or roller jaws

Definitions

  • the invention relates to an at least partially a tool along a striking axis drivingly driving hand tool with a Schlagwerkmaschinesch, in particular a hammer drill or a chisel hammer, according to the preamble of
  • Claim 1 and as from DE 101 57 831 A1 known.
  • EP160463 has a striking hand tool on a tool side open, one-piece pot-shaped striker, which is rotatably mounted even in the work spindle and limited axially movable.
  • the insertion of the impact tool is in turn rotatably within this pot-shaped bonnet and limited axially movably mounted and surrounded by flushing liquid before it penetrates the front side into a flushing bore of the impact tool.
  • the rinsing liquid as well as the seals arranged between moving parts largely prevent the entry of abrasive dust. Optimized for mine operations, the solution is not designed for standard dry building applications.
  • the object of the invention consists in the realization of a dust-tight as possible hand tool machine with a Schlagtechnikmaschinemaschinence.
  • a hand tool with which at least partially a tool along a striking axis is driven to beat, a striking tool and a work spindle, in which an at least unilaterally open receiving sleeve rotatably and axially limited movably mounted in the at least one locking element for a in the receiving sleeve insertable end of the tool is mounted radially displaceable, wherein the receiving sleeve is closed at one end by a fixed in her, axially projecting striker.
  • the receiving sleeve closing, fixed anvil are both together cup-shaped closed, whereby penetration of dust into the machine interior is prevented.
  • the striker is elastically fixed in the receiving sleeve by an elastic intermediate layer, eg. Vulcanization, whereby impact pulses applied to the free end of the striker are largely decoupled from the receiving sleeve and thus almost completely transferred to the impact tool.
  • an elastic intermediate layer eg. Vulcanization
  • the tool-side end face of the anvil is formed crowned, which can tolerate a lag moment tolerant to a recorded in the receiving sleeve insertion end can be done.
  • the receiving sleeve forms the machine side radially outward, axially and radially réelleckende rotary driving wing, which engage in appropriately associated spindle grooves of the work spindle, whereby the receiving sleeve is rotatably and axially limited movably connected to the work spindle.
  • the receiving sleeve radially inside, axially and radially réellede Drehmit Spotifystege, in which matingly associated rotary driving grooves of the insertion engage, whereby the insertion end is rotatably connected to the receiving sleeve.
  • At least one locking element in the receiving sleeve at least one locking element, further advantageously a locking ball, mounted radially displaceable, whereby a recorded in this tool is axially locked.
  • the tool forms associated elongated locking grooves, it is axially limited movable.
  • the shape of the locking recess corresponds to the shape of the locking element, for example, that of a spherical cap to a locking ball, it is axially fixed.
  • the locking element radially outwardly assigned a displaceable locking means, further advantageously a locking sleeve, whereby the locking of the tool can be locked in the receiving sleeve.
  • the locking means is resiliently biased by a spring means against the receiving sleeve, further advantageously via a spiral spring, whereby the locking means is formed self-locking.
  • the limited axially movable receiving sleeve with respect to the work spindle with a sealant sealed dustproof further advantageous via a diaphragm seal, which has at least one axial fold, whereby a sufficiently large axial movement is sealed fatigue-free.
  • the membrane seal is attached at one end to a spring cup, which is itself fixed dust-tight to the receiving sleeve, for example. Via an O-ring, whereby the axial length of the impact tool receptacle is shortened.
  • FIG. 1 has a hand tool machine 1, only partially shown, with which a tool 2 is driven with respect to a striking axis A striking and rotating, a striking tool holder 4 and a work spindle 5, in which a tool-side receiving sleeve 6 rotatably and axially limited movably mounted.
  • the insertion end 3 of the tool 2 introduced into the receiving sleeve 6 is locked in an axially fixed manner by means of two locking elements 7 mounted so as to be radially displaceable in the receiving sleeve 6.
  • the receiving sleeve 6 is closed on the machine side by a stopper 8 which is fixed in this machine-side axially and which has been transferred by shrinking into a press fit with the receiving sleeve 6.
  • the tool-side end face 9 of the striker 8 is formed crowned.
  • the receiving sleeve 6 forms the machine side radially outward, axially and radially réelleckende rotary drive wing 10, which engage in appropriately associated spindle grooves 11 of the work spindle 5.
  • the receiving sleeve 6 forms radially inward, axially and radially Retrockende Drehmit Spotifystege 12, in which suitably associated rotary driving grooves 13 of the insertion end 3 engage.
  • At least one locking element 7 is radially displaceably mounted and locked in the form of a locking ball.
  • the recorded tool 2 is fixed axially.
  • the locking element 7 is radially outwardly of a hand-operable outer sleeve 14th assigned displaceable locking means 15 in the form of a locking sleeve, which is biased by a spring means 16 in the form of a coil spring resiliently against the receiving sleeve 6.
  • the limited axially movable receiving sleeve 6 is dust-tight sealed with respect to the work spindle 5 with a sealant 17 in the form of a membrane seal with an axial drape, which is attached at one end to a spring cup 18, the dust-tight even on an O-ring 19 on the receiving sleeve. 6 is fixed.
  • the recorded in the impact tool holder 4 tool 2 with a substantially cylindrical insertion end 3 has two axially fixed locking in the receiving sleeve 6 with the two locking elements 7 in the form of locking balls form-fitting suitable locking recesses 20 in the form of Kugelkalottenaus principles adopted in the fourfold guide diameter F of Front end of the insertion end 3 are spaced.
  • the insertion end 3 also has two elongated locking grooves 21, which extend up to twelve and a half times the guide diameter F from the front end, but are inoperative in this impact tool receptacle 4.
  • Fig. 2 is according to the invention in contrast to Fig. 1 the striker 8 by an elastic intermediate layer 22 in the form of a vulcanization with silicone rubber elastically in the receiving sleeve 6 '(without Drehit Spotifystege 12 from Fig. 1 ) elastic.
  • the two locking elements 7 in the form of locking balls axially positively locking recess 20 ' is formed in the form of a circumferential Kreisringradialnut. There is no rotational drive of the insertion 3 '.
  • Fig. 3 are different from Fig. 1 the axially projecting striker 8 and the receiving sleeve 6 'which is open on one side are formed integrally from one piece and material.
  • the rotational drive of the insertion end 3 in the receiving sleeve 6 '(without rotary driving webs 12 off Fig. 1 ) takes place exclusively with the locking elements 7 and the form-locking locking recesses 20 of the insertion end.

Description

Die Erfindung bezeichnet eine zumindest teilweise ein Werkzeug längs einer Schlagachse schlagend antreibende Handwerkzeugmaschine mit einer Schlagwerkzeugaufnahme, insbesondere einen Bohrhammer oder einen Meisselhammer, nach dem Oberbegriff vonThe invention relates to an at least partially a tool along a striking axis drivingly driving hand tool with a Schlagwerkzeugaufnahme, in particular a hammer drill or a chisel hammer, according to the preamble of

Anspruch 1 und wie aus DE 101 57 831 A1 bekannt.Claim 1 and as from DE 101 57 831 A1 known.

Üblicherweise ist bei einer schlagenden Handwerkzeugmaschine an der optional drehenden Arbeitsspindel eine Schlagwerkzeugaufnahme festgelegt oder nach der DE8720512 direkt an dieser ausgebildet.Usually, in a striking hand tool on the optional rotating work spindle a Schlagwerkzeugaufnahme set or after DE8720512 formed directly on this.

In dieser Schlagwerkzeugaufnahme nach der DE8720512 ist in einer Aufnahmehülse ein Einsteckende eines Schlagwerkzeugs über längliche, beidseitig axial geschlossene Verriegelungsnuten, in welche ein radial versetzbarer Verriegelungskörper radial eingreift, begrenzt axial beweglich gelagert. Über in der Aufnahmehülse radial innen ausgebildete, sich axial und radial ersteckende Drehmitnahmestege, in welche passend zugeordnete Drehmitnahmenuten des Einsteckendes eingreifen, ist das Einsteckende drehfest mit der Aufnahmehülse verbunden. Angetrieben durch ein pneumatisches Schlagwerk schlägt ein Flugkolben auf einen axial beweglich gelagerten Döpper, welcher wiederum auf das Stirnende des Einsteckendes schlägt.In this impact tool holder after the DE8720512 is in a receiving sleeve a male end of a percussion tool on elongated, on both sides axially closed locking grooves, in which a radially displaceable locking body engages radially, limited axially movable mounted. About in the receiving sleeve radially inwardly formed, axially and radially ersteckende Drehmitnahmestege, in which mating associated rotary driving grooves of the insertion, the insertion end is rotatably connected to the receiving sleeve. Driven by a pneumatic percussion striking a flying piston on an axially movably mounted striker, which in turn strikes the front end of the spigot.

Nach der EP160463 weist eine schlagende Handwerkzeugmaschine einen werkzeugseitig offenen, einteilig topfförmigen Döpper auf, der selbst in der Arbeitsspindel drehfest sowie begrenzt axial beweglich gelagert ist. Das Einsteckende des Schlagwerkzeugs ist wiederum innerhalb dieses topfförmigen Döppers drehfest sowie begrenzt axial beweglich gelagert sowie von Spülflüssigkeit umspült bevor diese stirnseitig in eine Spülbohrung des Schlagwerkzeugs eindringt. Durch die Spülflüssigkeit sowie über die zwischen beweglichen Teilen angeordneten Dichtungen wird der Eintritt von abrasiven Staub weitgehend verhindert. Die für den Bergwerksbetrieb optimierte Lösung ist für trockene Standardanwendungen im Baugewerbe nicht ausgelegt.After EP160463 has a striking hand tool on a tool side open, one-piece pot-shaped striker, which is rotatably mounted even in the work spindle and limited axially movable. The insertion of the impact tool is in turn rotatably within this pot-shaped bonnet and limited axially movably mounted and surrounded by flushing liquid before it penetrates the front side into a flushing bore of the impact tool. The rinsing liquid as well as the seals arranged between moving parts largely prevent the entry of abrasive dust. Optimized for mine operations, the solution is not designed for standard dry building applications.

Zudem ist nach der US4184692 eine Drehbohwsrerkzeugaufnahme mit einer Arbeitsspindel bekannt, in der ein Werkzeug am im sonstigen zylinderförmigen Einsteckende über Kugeikatottenausnehmungen, in welche eine radial versetzbare Verriegelungskugel radial eingreift, axial und drehfest fixiert ist.Moreover, after the US4184692 a Drehbohwsrerkzeugaufnahme with a work spindle known in which a tool on in the other cylindrical plug-in over Kugeikatottenausnehmungen, in which a radially displaceable locking ball engages radially, is fixed axially and rotationally fixed.

Die Aufgabe der Erfindung besteht in der Realisierung einer möglichst staubdichten Handwerkzeugmaschine mit einer Schlagwerkzeugaufnahme.The object of the invention consists in the realization of a dust-tight as possible hand tool machine with a Schlagwerkzeugaufnahme.

Die Aufgabe wird im Wesentlichen durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.The object is essentially achieved by the features of claim 1. Advantageous developments emerge from the subclaims.

So weist eine Handwerkzeugmaschine, mit welcher zumindest teilweise ein Werkzeug längs einer Schlagachse schlagend antreibbar ist, eine Schlagwerkzeugaufnahme und eine Arbeitsspindel auf, in welcher eine zumindest einseitig offene Aufnahmehülse drehfest sowie axial begrenzt beweglich gelagert ist, in der zumindest ein Verriegelungselement für ein in die Aufnahmehülse einführbares Einsteckende des Werkzeuges radial versetzbar gelagert ist, wobei die Aufnahmehülse an einem Ende durch einen in ihr festgelegten, axial überstehenden Döpper verschlossen ist.Thus, a hand tool, with which at least partially a tool along a striking axis is driven to beat, a striking tool and a work spindle, in which an at least unilaterally open receiving sleeve rotatably and axially limited movably mounted in the at least one locking element for a in the receiving sleeve insertable end of the tool is mounted radially displaceable, wherein the receiving sleeve is closed at one end by a fixed in her, axially projecting striker.

Durch den maschinenseitig die Aufnahmehülse verschliessenden, festgelegten Döpper sind beide zusammen topfförmig geschlossen ausgebildet, wodurch ein Eindringen von Staub in das Maschineninnere verhindert wird.By the machine side, the receiving sleeve closing, fixed anvil are both together cup-shaped closed, whereby penetration of dust into the machine interior is prevented.

Der Döpper ist durch eine elastische Zwischenschicht, bspw. eine Vulkanisation, elastisch in der Aufnahmehülse elastisch festgelegt, wodurch auf das freie Ende des Döppers aufgebrachte Schlagimpulse von der Aufnahmehülse weitgehend entkoppelt sind und somit nahezu völlständig auf das Schlagwerkzeug übertragen werden.The striker is elastically fixed in the receiving sleeve by an elastic intermediate layer, eg. Vulcanization, whereby impact pulses applied to the free end of the striker are largely decoupled from the receiving sleeve and thus almost completely transferred to the impact tool.

Vorteilhaft ist die werkzeugseitige Stirnseite des Döppers ballig ausgebildet, wodurch lagetolerant ein zentraler Kraftstoss auf ein In der Aufnahmehülse aufgenommenes Einsteckende erfolgen kann.Advantageously, the tool-side end face of the anvil is formed crowned, which can tolerate a lag moment tolerant to a recorded in the receiving sleeve insertion end can be done.

Vorteilhaft bildet die Aufnahmehülse maschinenseitig radial aussen, sich axial und radial ersteckende Drehmitnahmeflügel aus, welche in passend zugeordnete Spindelnuten der Arbeitsspindel eingreifen, wodurch die Aufnahmehülse drehfest und axial begrenzt beweglich mit der Arbeitsspindel verbunden ist.Advantageously, the receiving sleeve forms the machine side radially outward, axially and radially ersteckende rotary driving wing, which engage in appropriately associated spindle grooves of the work spindle, whereby the receiving sleeve is rotatably and axially limited movably connected to the work spindle.

Vorteilhaft bildet die Aufnahmehülse radial innen, sich axial und radial ersteckende Drehmitnahmestege aus, in welche passend zugeordnete Drehmitnahmenuten des Einsteckendes eingreifen, wodurch das Einsteckende drehfest mit der Aufnahmehülse verbunden ist.Advantageously, the receiving sleeve radially inside, axially and radially ersteckende Drehmitnahmestege, in which matingly associated rotary driving grooves of the insertion engage, whereby the insertion end is rotatably connected to the receiving sleeve.

Vorteilhaft ist in der Aufnahmehülse zumindest ein Verriegelungselement, weiter vorteilhaft eine Verriegelungskugel, radial versetzbar gelagert, wodurch ein in dieser aufgenommenes Werkzeug axial verriegelbar ist. Wenn das Werkzeug zugeordnete längliche Verriegelungsnuten ausbildet, ist es axial begrenzt beweglich. Entspricht hingegen die Form der Verriegelungsausnehmung der Form des Verriegelungselements, bspw. die einer Kugelkalotte zu einer Verriegelungskugel, ist es axial fixiert.Advantageously, in the receiving sleeve at least one locking element, further advantageously a locking ball, mounted radially displaceable, whereby a recorded in this tool is axially locked. When the tool forms associated elongated locking grooves, it is axially limited movable. If, in contrast, the shape of the locking recess corresponds to the shape of the locking element, for example, that of a spherical cap to a locking ball, it is axially fixed.

Vorteilhaft ist dem Verriegelungselement radial aussen ein versetzbares Arretiermittel zugeordnet, weiter vorteilhaft eine Arretierhülse, wodurch die Verriegelung des Werkzeugs in der Aufnahmehülse arretiert werden kann.Advantageously, the locking element radially outwardly assigned a displaceable locking means, further advantageously a locking sleeve, whereby the locking of the tool can be locked in the receiving sleeve.

Vorteilhaft ist das Arretiermittel über ein Federmittel federnd gegen die Aufnahmehülse vorgespannt, weiter vorteilhaft über eine Spiralfeder, wodurch das Arretiermittel selbstarretierend ausgebildet ist.Advantageously, the locking means is resiliently biased by a spring means against the receiving sleeve, further advantageously via a spiral spring, whereby the locking means is formed self-locking.

Vorteilhaft ist die begrenzt axial bewegliche Aufnahmehülse gegenüber der Arbeitsspindel mit einem Dichtmittel staubdicht abgedichtet, weiter vorteilhaft über eine Membrandichtung, die zumindest einen axialen Faltenwurf aufweist, wodurch eine hinreichend grosse Axialbewegung ermüdungsfrei abgedichtet wird.Advantageously, the limited axially movable receiving sleeve with respect to the work spindle with a sealant sealed dustproof, further advantageous via a diaphragm seal, which has at least one axial fold, whereby a sufficiently large axial movement is sealed fatigue-free.

Vorteilhaft ist die Membrandichtung mit einem Ende an einem Federtopf befestigt, der selbst staubdicht an der Aufnahmehülse fixiert ist, bspw. über einen O-Ring, wodurch die axiale Baulänge der Schlagwerkzeugaufnahme verkürzt ist.Advantageously, the membrane seal is attached at one end to a spring cup, which is itself fixed dust-tight to the receiving sleeve, for example. Via an O-ring, whereby the axial length of the impact tool receptacle is shortened.

Die Erfindung wird bezüglich eines vorteilhaften Ausführungsbeispiels näher erläutert mit:

  • Fig. 1 als Detail einer Handwerkzeugmaschine mit Werkzeug im Längsschnitt zur Erläuterung
  • Fig. 2 als erfindungsgemäße Variante der Handwerkzeugmaschine mit Werkzeug im Längsschnitt
  • Fig. 3 als nicht erfindungsgemäβe Variante der Handwerkzeugmaschine mit Werkzeug im Längsschnitt
The invention will be explained in more detail with respect to an advantageous embodiment with:
  • Fig. 1 as a detail of a hand tool with tool in longitudinal section for explanation
  • Fig. 2 as a variant of the invention hand tool with tool in longitudinal section
  • Fig. 3 as not according to the invention variant of the power tool with tool in longitudinal section

Nach Fig. 1 weist eine nur teilweise dargestellte Handwerkzeugmaschine 1, mit welcher ein Werkzeug 2 bezüglich einer Schlagachse A schlagend und drehend angetrieben wird, eine Schlagwerkzeugaufnahme 4 und eine Arbeitsspindel 5 auf, in welcher eine werkzeugseitig offene Aufnahmehülse 6 drehfest sowie axial begrenzt beweglich gelagert ist. Das in die Aufnahmehülse 6 eingeführte Einsteckende 3 des Werkzeuges 2 ist über zwei in der Aufnahmehülse 6 radial versetzbar gelagerte Verriegelungselemente 7 axial fixiert verriegelt. Die Aufnahmehülse 6 ist andererseits maschinenseitig von einem in dieser festgelegten, maschinenseitig axial überstehenden Döpper 8 verschlossen, der durch Schrumpfen in einen Pressverband mit der Aufnahmehülse 6 überführt wurde. Die werkzeugseitige Stirnseite 9 des Döppers 8 ist ballig ausgebildet. Die Aufnahmehülse 6 bildet maschinenseitig radial aussen, sich axial und radial ersteckende Drehmitnahmeflügel 10 aus, welche in passend zugeordnete Spindelnuten 11 der Arbeitsspindel 5 eingreifen. Zudem bildet die Aufnahmehülse 6 radial innen, sich axial und radial ersteckende Drehmitnahmestege 12 aus, in welche passend zugeordnete Drehmitnahmenuten 13 des Einsteckendes 3 eingreifen. In der Aufnahmehülse 6 ist zumindest ein Verriegelungselement 7 in Form einer Verriegelungskugel radial versetzbar gelagert und verriegelt. Über das Verriegelungselement 7 wird das aufgenommene Werkzeug 2 axial fixiert. Dem Verriegelungselement 7 ist radial äussen ein von einer handbetätigbaren Aussenhülse 14 versetzbares Arretiermittel 15 in Form einer Arretierhülse zugeordnet, welche über ein Federmittel 16 in Form einer Schraubenfeder federnd gegen die Aufnahmehülse 6 vorgespannt ist. Die begrenzt axial bewegliche Aufnahmehülse 6 ist gegenüber der Arbeitsspindel 5 mit einem Dichtmittel 17 in Form einer Membrandichtung mit einem axialen Faltenwurf staubdicht abgedichtet, die mit einem Ende an einem Federtopf 18 befestigt ist, der selbst über einen O-Ring 19 staubdicht an der Aufnahmehülse 6 fixiert ist. Das in der Schlagwerkzeugaufnahme 4 aufgenommene Werkzeug 2 mit einem im Wesentlichen zylinderförmigen Einsteckende 3 weist zwei zur axial fixierten Verriegelung in der Aufnahmehülse 6 mit den beiden Verriegelungselementen 7 in Form von Verriegelungskugeln formschlüssig geeignete Verriegelungsausnehmungen 20 in Form von Kugelkalottenausnehmungen auf, die im vierfachen Führungsdurchmesser F vom Stirnende des Einsteckendes 3 beabstandet sind. Zudem weist das Werkzeug 2 stirnseitig am Einsteckende 3 zwei endseitig offene Drehmitnahmenuten 13 auf, in welche die Drehmitnahmestege 12 der Aufnahmehülse 6 formschlüssig eingreifen. Das Einsteckende 3 weist aus Kompatibilitätsgründen zudem noch zwei längliche Verriegelungsnuten 21 auf, die sich bis zum zweleinhalbfachen des Führungsdurchmessers F vom Stirnende erstrecken, jedoch in dieser Schlagwerkzeugaufnahme 4 funktionslos sind.To Fig. 1 has a hand tool machine 1, only partially shown, with which a tool 2 is driven with respect to a striking axis A striking and rotating, a striking tool holder 4 and a work spindle 5, in which a tool-side receiving sleeve 6 rotatably and axially limited movably mounted. The insertion end 3 of the tool 2 introduced into the receiving sleeve 6 is locked in an axially fixed manner by means of two locking elements 7 mounted so as to be radially displaceable in the receiving sleeve 6. On the other hand, the receiving sleeve 6 is closed on the machine side by a stopper 8 which is fixed in this machine-side axially and which has been transferred by shrinking into a press fit with the receiving sleeve 6. The tool-side end face 9 of the striker 8 is formed crowned. The receiving sleeve 6 forms the machine side radially outward, axially and radially ersteckende rotary drive wing 10, which engage in appropriately associated spindle grooves 11 of the work spindle 5. In addition, the receiving sleeve 6 forms radially inward, axially and radially ersteckende Drehmitnahmestege 12, in which suitably associated rotary driving grooves 13 of the insertion end 3 engage. In the receiving sleeve 6, at least one locking element 7 is radially displaceably mounted and locked in the form of a locking ball. About the locking element 7, the recorded tool 2 is fixed axially. The locking element 7 is radially outwardly of a hand-operable outer sleeve 14th assigned displaceable locking means 15 in the form of a locking sleeve, which is biased by a spring means 16 in the form of a coil spring resiliently against the receiving sleeve 6. The limited axially movable receiving sleeve 6 is dust-tight sealed with respect to the work spindle 5 with a sealant 17 in the form of a membrane seal with an axial drape, which is attached at one end to a spring cup 18, the dust-tight even on an O-ring 19 on the receiving sleeve. 6 is fixed. The recorded in the impact tool holder 4 tool 2 with a substantially cylindrical insertion end 3 has two axially fixed locking in the receiving sleeve 6 with the two locking elements 7 in the form of locking balls form-fitting suitable locking recesses 20 in the form of Kugelkalottenausnehmungen in the fourfold guide diameter F of Front end of the insertion end 3 are spaced. In addition, the tool 2 on the front side at the insertion end 3 on two open-end rotary drive grooves 13, in which the rotational engagement webs 12 of the receiving sleeve 6 engage positively. For reasons of compatibility, the insertion end 3 also has two elongated locking grooves 21, which extend up to twelve and a half times the guide diameter F from the front end, but are inoperative in this impact tool receptacle 4.

Nach Fig. 2 ist erfindungsgemäβ im Unterschied zu Fig. 1 der Döpper 8 durch eine elastische Zwischenschicht 22 in Form einer Vulkanisation mit Silikonkautschuk elastisch in der Aufnahmehülse 6' (ohne Drehmitnahmestege 12 aus Fig. 1) elastisch festgelegt. Die zu den beiden Verriegelungselementen 7 in Form von Verriegelungskugeln axial formschlüssig geeignete Verriegelungsausnehmung 20' ist in Form einer umlaufenden Kreisringradialnut ausgebildet. Es erfolgt keine Drehmitnahme des Einsteckendes 3'.To Fig. 2 is according to the invention in contrast to Fig. 1 the striker 8 by an elastic intermediate layer 22 in the form of a vulcanization with silicone rubber elastically in the receiving sleeve 6 '(without Drehitnahmestege 12 from Fig. 1 ) elastic. The two locking elements 7 in the form of locking balls axially positively locking recess 20 'is formed in the form of a circumferential Kreisringradialnut. There is no rotational drive of the insertion 3 '.

Nach Fig. 3 sind im Unterschied zu Fig. 1 der axial überstehende Döpper 8 und die einseitig offene Aufnahmehülse 6' zusammen einteilig aus einem Stück und Material ausgebildet. Die Drehmitnahme des Einsteckendes 3 in der Aufnahmehülse 6' (ohne Drehmitnahmestege 12 aus Fig. 1) erfolgt ausschliesslich mit den Verriegelungselementen 7 und den dazu formschlüssigen Verriegelungsausnehmungen 20 des Einsteckendes 3.To Fig. 3 are different from Fig. 1 the axially projecting striker 8 and the receiving sleeve 6 'which is open on one side are formed integrally from one piece and material. The rotational drive of the insertion end 3 in the receiving sleeve 6 '(without rotary driving webs 12 off Fig. 1 ) takes place exclusively with the locking elements 7 and the form-locking locking recesses 20 of the insertion end. 3

Claims (9)

  1. A hand tool machine, with which at least partly a tool (2) may be driven striking along a striking axis (A), with a striking tool holder (4) and a work spindle (5), in which a holding sleeve (6, 6'), which Is open on at least one side, Is mounted so that it is torsionally rigid and may only move axially In a limited way, In which at least one locking element (7) for a shank (3, 3') of the tool (2), which may be inserted into the holding sleeve (6, 6'), is mounted so that it may be moved radially, In which the holding sleeve (6, 6') Is closed at one end by an axially projecting riveting set (8), which is set in it, characterised In that the riveting set (8) Is set in the holding sleeve (6') elastically by an elastic intermediate layer (22).
  2. Hand tool machine according to claim 1, characterised In that the front (9) of the riveting set (8) on the tool side Is convex.
  3. Hand tool machine according to one of claims 1 or 2, characterised in that on the machine side the holding sleeve (6, 6') forms rotary driving blades (10), extending axially and radially and radially outwards, which engage In suitably allocated spindle grooves (11) of the work spindle (5).
  4. Hand tool machine according to one of claims 1 to 3, characterised In that the holding sleeve (6) forms rotary driving studs (12), extending axially and radially and radially outwards, In which suitably allocated rotary driving grooves (13) of the shank (3) engage.
  5. Hand tool machine according to one of claims 1 to 4, characterised In that at least one locking element (7) is mounted so that It may be moved radially In the holding sleeve (6, 6').
  6. Hand tool machine according to one of claims 1 to 5, characterised In that a locating means (15), which may be moved, is allocated to the locking element (7) radially outwards.
  7. Hand tool machine according to claim 6, characterised in that the locating means (15) Is pretensioned against the holding sleeve (6, 6') through a means of spring loading (16).
  8. Hand tool machine according to one of claims 1 to 7, characterised in that the holding sleeve (6, 6'), which may move axially in a limited way, is sealed in a dustproof way with a sealant (17) In respect of with the work spindle (5).
  9. Hand tool machine according to claim 8, characterised In that the sealant (17) is fastened with one end to a spring cap (18), which itself is fixed to the holding sleeve (6, 6') In a dustproof way.
EP08105656.6A 2007-11-23 2008-10-24 Hand tool machine with striking tool holder Active EP2062698B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007056531A DE102007056531A1 (en) 2007-11-23 2007-11-23 Hand tool machine with impact tool holder and associated tool

Publications (2)

Publication Number Publication Date
EP2062698A1 EP2062698A1 (en) 2009-05-27
EP2062698B1 true EP2062698B1 (en) 2013-06-05

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EP08105656.6A Active EP2062698B1 (en) 2007-11-23 2008-10-24 Hand tool machine with striking tool holder

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US (1) US8459658B2 (en)
EP (1) EP2062698B1 (en)
JP (1) JP5432505B2 (en)
CN (1) CN101439512B (en)
DE (1) DE102007056531A1 (en)

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Also Published As

Publication number Publication date
US8459658B2 (en) 2013-06-11
JP5432505B2 (en) 2014-03-05
CN101439512A (en) 2009-05-27
DE102007056531A1 (en) 2009-05-28
EP2062698A1 (en) 2009-05-27
JP2009125929A (en) 2009-06-11
US20090145620A1 (en) 2009-06-11
CN101439512B (en) 2012-10-10

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