EP2062698A1 - Hand tool machine with striking tool holder and associated tool - Google Patents

Hand tool machine with striking tool holder and associated tool Download PDF

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Publication number
EP2062698A1
EP2062698A1 EP08105656A EP08105656A EP2062698A1 EP 2062698 A1 EP2062698 A1 EP 2062698A1 EP 08105656 A EP08105656 A EP 08105656A EP 08105656 A EP08105656 A EP 08105656A EP 2062698 A1 EP2062698 A1 EP 2062698A1
Authority
EP
European Patent Office
Prior art keywords
receiving sleeve
hand tool
tool according
axially
tool
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.)
Granted
Application number
EP08105656A
Other languages
German (de)
French (fr)
Other versions
EP2062698B1 (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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Publication of EP2062698B1 publication Critical patent/EP2062698B1/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 refers to an at least partially a tool driving along a striking axis hand tool with a Schlagwerkmaschinesch, in particular a hammer drill or a chisel hammer.
  • 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 striking tool holder and an associated tool.
  • 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 one side 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 rigidly fixed by a press fit, for example, by shrinking, or by a cohesive connection such as gluing, soldering in the receiving sleeve, whereby a rigidly assembled body is technologically easy to produce.
  • the striker is elastically fixed elastically in the receiving sleeve by an elastic intermediate layer, for example.
  • a 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.
  • the axially projecting striker and the unilaterally open receiving sleeve in one piece from a common piece and the same material, making it economically simple to produce in large quantities, for example.
  • the tool-side end face of the anvil is formed crowned, whereby a positionally tolerable central impact on a recorded in the receiving sleeve insertion 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.
  • Locking ball is in particular a KugelkalottenausNeillung or at least piecewise circumferential Kreisringradialnut.
  • the (also hitting) drivable tool is axially fixed.
  • the transmission of the impact pulses itself requires virtually no axially limited displaceable longitudinal movement, but is already sufficiently given by the game of the positive connection between the locking element and matching locking recess. This also contributes to the dust sealing of the hand tool, since the creep dust carryover increases with the amplitude of the axial movement and vice versa.
  • the tool has at least one end open rotary drive groove on the end face on the insertion end, whereby a high torque can be transmitted to the tool.
  • 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 outward 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 with 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 has for compatibility reasons also two elongated locking grooves 21 which extend up to two and a half times the guide diameter F from the front end, but in this impact tool holder 4 are inoperative.
  • Fig. 2 is different from 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.

Abstract

The machine (1) has a striking tool receiver (4) and a work spindle (5) in which a one-sided open receiving sleeve (6) is movably mounted, in a torque proof and axially defined manner. A locking element (7) for a spigot (3) of a tool (2) e.g. drill hammer, is radially and displaceably mounted and inserted in the receiving sleeve. The receiving sleeve is closed at an end by an axially overlaid rivet snap (8). The rivet snap is fixedly defined by an interference fit assembly in the receiving sleeve. The rivet snap has a spherical tool-sided front side (9).

Description

Die Erfindung bezeichnet eine zumindest teilweise ein Werkzeug längs einer Schlagachse schlagend antreibende Handwerkzeugmaschine mit einer Schlagwerkzeugaufnahme, insbesondere einen Bohrhammer oder einen Meisselhammer.The invention refers to an at least partially a tool driving along a striking axis hand tool with a Schlagwerkzeugaufnahme, in particular a hammer drill or a chisel hammer.

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 Einsteckende a striking 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, which engage appropriately associated rotary driving grooves of the insertion, the spigot 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 Drehbohrwerkzeugaufnahme mit einer Arbeitsspindel bekannt, in der ein Werkzeug am im sonstigen zylinderförmigen Einsteckende über Kugelkalottenausnehmungen, in welche eine radial versetzbare Verriegelungskugel radial eingreift, axial und drehfest fixiert ist.Moreover, after the US4184692 a Drehbohrwerkzeugaufnahme with a work spindle known in which a tool on in the other cylindrical plug-in over Kugelkalottenausnehmungen into 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 sowie einem zugeordneten Werkzeug.The object of the invention consists in the realization of a dust-tight as possible hand tool machine with a striking tool holder and an associated tool.

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 one side 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.

Vorteilhaft ist der Döpper durch einen Pressverband, bspw. durch Schrumpfen, oder durch eine stoffschlüssige Verbindung wie Kleben, Löten in der Aufnahmehülse starr festgelegt, wodurch ein starr zusammengesetzter Körper technologisch einfach herstellbar ist.Advantageously, the striker is rigidly fixed by a press fit, for example, by shrinking, or by a cohesive connection such as gluing, soldering in the receiving sleeve, whereby a rigidly assembled body is technologically easy to produce.

Alternativ vorteilhaft ist der Döpper 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 vollständig auf das Schlagwerkzeug übertragen werden.Alternatively, the striker is elastically fixed elastically in the receiving sleeve by an elastic intermediate layer, for example. A 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.

Alternativ bestehen der axial überstehende Döpper und die einseitig offene Aufnahmehülse einteilig aus einem gemeinsamen Stück und demselben Material, wodurch dieser in grossen Stückzahlen ökonomisch einfach herstellbar ist, bspw. durch Formschmieden.Alternatively, the axially projecting striker and the unilaterally open receiving sleeve in one piece from a common piece and the same material, making it economically simple to produce in large quantities, for example. By form forging.

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, whereby a positionally tolerable central impact on a recorded in the receiving sleeve insertion 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.

Ein in der Schlagwerkzeugaufnahme aufnehmbares Werkzeug mit einem (im Wesentlichen zylinderförmigen) Schaft, welches eine zur axial fixierten Verriegelung in der Aufnahmehülse geeignete Verriegelungsausnehmung aufweist, die weiter als der dreifache Führungsdurchmesser vom Stirnende des Einsteckendes beabstandet ist. Für eine Verriegelungskugel ist das insbesondere eine Kugelkalottenausnehmung oder eine zumindest stückweise umlaufende Kreisringradialnut. Dadurch wird das (auch schlagend) antreibbare Werkzeug axial fixiert. Die Übertragung der Schlagimpulse selbst bedarf praktisch keiner axial begrenzt versetzbaren Längsbewegung, sondern ist bereits durch das Spiel des Formschlusses zwischen Verriegelungselement und passender Verriegelungsausnehmung hinreichend gegeben. Auch damit wird zur Staubabdichtung der Handwerkzeugmaschine beigetragen, da die Kriechstaubverschleppung mit der Amplitude der Axialbewegung wächst und umgekehrt.A recordable in the impact tool holder tool having a (substantially cylindrical) shaft which has a suitable locking for axially fixed locking in the receiving sleeve locking recess, which is spaced more than three times the guide diameter from the front end of the insertion end. For one Locking ball is in particular a Kugelkalottenausnehmung or at least piecewise circumferential Kreisringradialnut. As a result, the (also hitting) drivable tool is axially fixed. The transmission of the impact pulses itself requires virtually no axially limited displaceable longitudinal movement, but is already sufficiently given by the game of the positive connection between the locking element and matching locking recess. This also contributes to the dust sealing of the hand tool, since the creep dust carryover increases with the amplitude of the axial movement and vice versa.

Vorteilhaft weist das Werkzeug stirnseitig am Einsteckende zumindest eine endseitig offene Drehmitnahmenut auf, wodurch ein hohes Drehmoment auf das Werkzeug übertragbar ist.Advantageously, the tool has at least one end open rotary drive groove on the end face on the insertion end, whereby a high torque can be transmitted to the tool.

Die Erfindung wird bezüglich eines vorteilhaften Ausführungsbeispiels näher erläutert mit:

  • Fig. 1 als Detail der Handwerkzeugmaschine mit Werkzeug im Längsschnitt
  • Fig. 2 als Variante der Handwerkzeugmaschine mit Werkzeug im Längsschnitt
  • Fig. 3 als weitere 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 the hand tool with tool in longitudinal section
  • Fig. 2 as a variant of the power tool with tool in longitudinal section
  • Fig. 3 as a further 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 aussen 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 zweieinhalbfachen 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 outward 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 with 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. The insertion end 3 has for compatibility reasons also two elongated locking grooves 21 which extend up to two and a half times the guide diameter F from the front end, but in this impact tool holder 4 are inoperative.

Nach Fig. 2 ist 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 different from 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 (15)

Eine Handwerkzeugmaschine, mit welcher zumindest teilweise ein Werkzeug (2) längs einer Schlagachse (A) schlagend antreibbar ist, mit einer Schlagwerkzeugaufnahme (4) und einer Arbeitsspindel (5), in welcher eine zumindest einseitig offene Aufnahmehülse (6, 6') drehfest sowie axial begrenzt beweglich gelagert ist, in der zumindest ein Verriegelungselement (7) für ein in die Aufnahmehülse (6, 6') einführbares Einsteckende (3, 3') des Werkzeuges (2) radial versetzbar gelagert ist, dadurch gekennzeichnet, dass die Aufnahmehülse (6, 6') an einem Ende durch einen in ihr festgelegten, axial überstehenden Döpper (8) verschlossen ist.A hand tool with which at least partially a tool (2) along a striking axis (A) can be driven, with a striking tool receptacle (4) and a work spindle (5) in which an at least one side open receiving sleeve (6, 6 ') rotatably and axially limited movably mounted, in which at least one locking element (7) for a in the receiving sleeve (6, 6 ') insertable insertion (3, 3') of the tool (2) is mounted radially displaceable, characterized in that the receiving sleeve ( 6, 6 ') is closed at one end by an axially projecting anvil (8) fixed in it. Handwerkzeugmaschine nach Anspruch 1, dadurch gekennzeichnet, dass der Döpper (8) durch einen Pressverband in der Aufnahmehülse (6') starr festgelegt ist.Powered hand tool according to claim 1, characterized in that the striker (8) by a press fit in the receiving sleeve (6 ') is rigidly fixed. Handwerkzeugmaschine nach Anspruch 1, dadurch gekennzeichnet, dass der Döpper (8) durch eine stoffschlüssige Verbindung in der Aufnahmehülse (6') starr festgelegt ist.Powered hand tool according to claim 1, characterized in that the striker (8) by a cohesive connection in the receiving sleeve (6 ') is rigidly fixed. Handwerkzeugmaschine nach Anspruch 1, dadurch gekennzeichnet, dass der Döpper (8) durch eine elastische Zwischenschicht (22) in der Aufnahmehülse (6') elastisch festgelegt ist.Powered hand tool according to claim 1, characterized in that the striker (8) by an elastic intermediate layer (22) in the receiving sleeve (6 ') is elastically fixed. Handwerkzeugmaschine nach Anspruch 1, dadurch gekennzeichnet, dass der axial überstehende Döpper (8) und die einseitig offene Aufnahmehülse (6') einteilig aus einem gemeinsamen Stück und demselben Material bestehen.Powered hand tool according to claim 1, characterized in that the axially projecting striker (8) and the unilaterally open receiving sleeve (6 ') consist of one piece of a common piece and the same material. Handwerkzeugmaschine nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die werkzeugseitige Stirnseite (9) des Döppers (8) ballig ausgebildet ist.Hand tool according to one of claims 1 to 5, characterized in that the tool-side end face (9) of the striker (8) is formed crowned. Handwerkzeugmaschine nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Aufnahmehülse (6, 6') maschinenseitig radial aussen, sich axial und radial ersteckende Drehmitnahmeflügel (10) ausbildet, welche in passend zugeordnete Spindelnuten (11) der Arbeitsspindel (5) eingreifen.Powered hand tool according to one of claims 1 to 6, characterized in that the receiving sleeve (6, 6 ') on the machine side radially outside, axially and radially ersteckende rotary drive wing (10) is formed, which engage in appropriately associated spindle grooves (11) of the work spindle (5) , Handwerkzeugmaschine nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Aufnahmehülse (6) radial innen, sich axial und radial ersteckende Drehmitnahmestege (12) ausbildet, in welche passend zugeordnete Drehmitnahmenuten (13) des Einsteckendes (3) eingreifen.Powered hand tool according to one of claims 1 to 7, characterized in that the receiving sleeve (6) radially inwardly, axially and radially ersteckende Drehmitnahmestege (12) is formed in which matingly associated rotary driving grooves (13) of the insertion (3) engage. Handwerkzeugmaschine nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass in der Aufnahmehülse (6, 6') zumindest ein Verriegelungselement (7) radial versetzbar gelagert ist.Powered hand tool according to one of claims 1 to 8, characterized in that in the receiving sleeve (6, 6 ') at least one locking element (7) is mounted radially displaceable. Handwerkzeugmaschine nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass dem Verriegelungselement (7) radial aussen ein versetzbares Arretiermittel (15) zugeordnet ist.Powered hand tool according to one of claims 1 to 9, characterized in that the locking element (7) radially outwardly a displaceable locking means (15) is associated. Handwerkzeugmaschine nach Anspruch 10, dadurch gekennzeichnet, dass das Arretiermittel (15) über ein Federmittel (16) federnd gegen die Aufnahmehülse (6, 6') vorgespannt ist.Powered hand tool according to claim 10, characterized in that the locking means (15) via a spring means (16) is resiliently biased against the receiving sleeve (6, 6 '). Handwerkzeugmaschine nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die begrenzt axial bewegliche Aufnahmehülse (6, 6') gegenüber der Arbeitsspindel (5) mit einem Dichtmittel (17) staubdicht abgedichtet ist.Powered hand tool according to one of claims 1 to 11, characterized in that the limited axially movable receiving sleeve (6, 6 ') relative to the work spindle (5) with a sealing means (17) is sealed dust-tight. Handwerkzeugmaschine nach Anspruch 12, dadurch gekennzeichnet, dass das Dichtmittel (17) mit einen Ende an einem Federtopf (18) befestigt ist, der selbst staubdicht an der Aufnahmehülse (6, 6') fixiert ist.Powered hand tool according to claim 12, characterized in that the sealing means (17) is fastened with one end to a spring cup (18), which itself is fixed in a dust-tight manner to the receiving sleeve (6, 6 '). In einer Schlagwerkzeugaufnahme nach einem der Ansprüche 1 bis 13 aufnehmbares Werkzeug (2) mit einem Einsteckende (3, 3'), welches eine zur axial fixierten Verriegelung in der Aufnahmehülse (6, 6') geeignete Verriegelungsausnehmung (20, 20') aufweist, die weiter als der dreifache Führungsdurchmesser (F) vom Stirnende des Einsteckendes (3, 3') beabstandet ist.In a striking tool holder according to one of claims 1 to 13 recordable tool (2) having a spigot (3, 3 '), which has a for axially fixed locking in the receiving sleeve (6, 6') suitable locking recess (20, 20 '), which is more than three times the guide diameter (F) from the front end of the insertion end (3, 3 ') spaced. Werkzeug nach Anspruch 14, dadurch gekennzeichnet, dass das Einsteckende (3) zumindest eine endseitig offene Drehmitnahmenut (13) aufweist.Tool according to claim 14, characterized in that the insertion end (3) has at least one open-end rotary driving groove (13).
EP08105656.6A 2007-11-23 2008-10-24 Hand tool machine with striking tool holder Active EP2062698B1 (en)

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DE102007056531A DE102007056531A1 (en) 2007-11-23 2007-11-23 Hand tool machine with impact tool holder and associated tool

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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
EP2062698B1 (en) 2013-06-05
JP2009125929A (en) 2009-06-11
US20090145620A1 (en) 2009-06-11
CN101439512B (en) 2012-10-10

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