EP2017039A2 - Powered hand-tool with percussion mechanism - Google Patents
Powered hand-tool with percussion mechanism Download PDFInfo
- Publication number
- EP2017039A2 EP2017039A2 EP08104150A EP08104150A EP2017039A2 EP 2017039 A2 EP2017039 A2 EP 2017039A2 EP 08104150 A EP08104150 A EP 08104150A EP 08104150 A EP08104150 A EP 08104150A EP 2017039 A2 EP2017039 A2 EP 2017039A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- wobble
- hand tool
- adjusting
- lifting body
- tool according
- 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.)
- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D11/00—Portable percussive tools with electromotor or other motor drive
- B25D11/06—Means for driving the impulse member
- B25D11/12—Means for driving the impulse member comprising a crank mechanism
- B25D11/125—Means for driving the impulse member comprising a crank mechanism with a fluid cushion between the crank drive and the striking body
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D11/00—Portable percussive tools with electromotor or other motor drive
- B25D11/005—Arrangements for adjusting the stroke of the impulse member or for stopping the impact action when the tool is lifted from the working surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D11/00—Portable percussive tools with electromotor or other motor drive
- B25D11/06—Means for driving the impulse member
- B25D11/062—Means for driving the impulse member comprising a wobbling mechanism, swash plate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
- B25D2211/003—Crossed drill and motor spindles
-
- 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
- B25D2250/331—Use of bearings
Definitions
- the invention relates to a hand tool with pneumatic percussion referred to in the preamble of claim 1.
- Such hand tool machines are z. B. formed as a chisel or combi hammer.
- From the DE 32 05 141 A1 is designed as an electrically operated hammer drill hand tool with an air cushion impact known, which is drivable via a wobble member of a swash plate drive.
- the impact mechanism has a guided in a guide tube exciter element, such as an exciter piston, which is axially reciprocally movable by means of the wobble member.
- the excitation element drives via an air cushion or an air spring also guided in the guide tube impact element that exerts a striker on a front recorded in a tool holder tool.
- To adjust the maximum stroke of the exciter element of the wobble angle of the wobble member is adjustable via a stepping device designed as adjusting in three stages.
- a hub body of the wobble member is rotatably adjustable relative to this under adjustment of the wobble angle relative to this and in the respective relative rotational position via coupling elements positively coupled to the holding body, wherein the holding body is seated obliquely on an intermediate shaft.
- an axial displacement of the intermediate shaft in a stepwise rotational adjustment of the hub body to change the wobble angle is implemented via the step switching device.
- step switching device is switchable only when switched off hand tool and also structurally very complex.
- the present invention has for its object to provide a hand tool of the type mentioned above, which avoids the disadvantages mentioned.
- the adjusting device has a displacement element displaceable along the longitudinal extension of the wobble element for the stepless adjustment of the wobble angle of the wobble element, whereby likewise a stepless adjustment of the stroke of the excitation piston is made possible. Due to the stepless controllability, it is also possible to perform an adjustment during operation of the power tool.
- the percussion of the power tool can adapt so in operation to changed physical properties of the material to be machined, z. B. in the transition from plaster to brick or concrete.
- a lifting body via which a lifting movement is transferable to the wobble member, wherein the lifting body via the adjusting element along a longitudinal extent of the wobble member is displaceable relative to this.
- the lifting body not only serves to transmit the kinetic energy delivered by the motor to the wobble member, but, like the adjusting element, it is part of the adjusting device for adjusting the movement stroke of the exciter piston, by means of which the maximum possible wobble angle of the wobble member is adjustable.
- the lifting body has a bearing receptacle through which the wobble member is guided in order to realize in a structurally simple manner a movement coupling of the lifting body and the wobble member along the stroke axis of the lifting body.
- the lifting body on a slot for a rotatable eccentric pin which is spaced in the longitudinal direction of the lifting body of the bearing support for the wobble member, wherein the lifting body via the adjusting element along the longitudinal extension of the eccentric pin is axially displaceable.
- a rotational movement coming from the engine via the eccentric pin can be converted into a lifting movement of the lifting body.
- the eccentric pin is elongated to ensure engagement in the slot of the lifting body in all adjustment positions of the lifting body.
- the wobble member is pivotally mounted via a pivot sleeve in the bearing receptacle in the lifting body, whereby a low-wear storage is ensured.
- the pivot sleeve on a spherical outer shape and the bearing receiving a corresponding to the curvature of the spherical outer shape of the pivot sleeve inner contour is made possible relative to the lifting body while allowing an adjustment of the lifting body relative to the wobble member when the lifting body is displaced over the adjusting element in its position along the longitudinal extension of the wobble member.
- a manually operable actuating element for the adjusting element is provided, via which an operator of the power tool can easily adjust the wobble angle of the wobble member and thus the stroke of the exciter piston.
- the adjusting element has a first adjusting member which is coupled in terms of movement with a second adjusting member arranged on the actuating element, whereby a structurally simple movement coupling between the actuating element and the adjusting element of the adjusting device is achieved.
- the actuating element is designed as a thumbwheel.
- an end facing away from the exciter element of the wobble member on a bearing element which is pivotally mounted on an abutment element and axially fixed relative to its longitudinal extension, whereby a low-wear and durable pivotal mounting of the wobble member is achieved.
- the bearing element is advantageously designed as a ball head, which is mounted in the counter-bearing element designed as a socket but pivotally fixed axially (based on its longitudinal extent).
- FIGS. 1 to 3 a trained as a rotating and hammering combi hammer hand tool 10 is reproduced, which has a housing 11 in which a force acting on a tool holder 14 in a tool holder 14 impact mechanism 20, a total of 13 designated wobble drive and a motor 12 are arranged.
- the percussion mechanism 20 has a guide tube 21, in which a exciter element 22 designed as an exciter piston is guided to be moved back and forth.
- the guide tube 21 may be formed in two or more parts to simplify the assembly.
- the percussion mechanism 20 defines a central striking mechanism axis S which runs centrally through the guide tube 21 and the elements (excitation element 22 etc.) moved in the guide tube 21.
- In the guide tube 21 is still further designed as a flying piston impact element 23 axially displaceable.
- the striking element 23 can also be displaced into an oscillating stroke movement via the exciter piston and the air spring 24 lying between it and the exciter element 22.
- the striking element 23 strikes in the impact mode of the power tool 10 on a striker (not shown in the figures), which in turn strikes a tool (not shown in the figures). Alternatively, the striking element 23 strikes directly on the end of a tool.
- the air spring 24 or gas spring (depending on the gas or gas mixture used) between the excitation element 22 and the striking element 23 can be switched on and off via switching means (not shown in the figures).
- the excitation element 22 is connected to generate a lifting movement during operation of the power tool 10 with a pivotally mounted on this wobble member 29 of the wobble drive 13 (on the pivot bearing 38).
- a pivot sleeve 28 is slidably guided, which has circumferentially a spherical shape and which is pivotally mounted in a bearing receptacle 27 in a disk-shaped lifting body 25 of the wobble drive 13.
- the lifting body 25 in turn is along its longitudinal extent with a projection designed as a dovetail projection slidably guided in a designed as a dovetail groove guide 33 of an adjusting element 31 of a total of 30 designated adjusting device for the stroke of the excitation element 22.
- the lifting body 25 has at its end remote from the bearing receptacle 27 an aligned transversely to its longitudinal extent slot 26 through which engages an elongated eccentric pin 18 which rotatably sits on a bearing shaft 19 together with an eccentric 17.
- the eccentric 17 meshes with its external thread a thread of the output 15 of the motor 12.
- Das z. B. designed as an elongate round rod wobble member 29 has at its end remote from the exciter element 22 a designed as a ball head bearing element 39 which is pivotally mounted in a trained as a socket pan bearing element 40 but axially fixed (based on its longitudinal extent).
- a rotational movement of the motor 12 is first transmitted by this arrangement to the eccentric wheel 17 with the eccentric pin 18 (direction of rotation 16 in FIG Fig. 3 ) and then implemented via the eccentric pin 18 in the slot 26 in a linear reciprocating movement of the lifting body 25.
- this movement is now transferred to the wobble member 29, which is set in a reciprocating pivotal movement (see., Pulled and dashed illustrated wobble member 29 in the FIGS. 1 and 2 ) and thereby pivoted at a maximum by a wobble angle alpha 1.
- the wobble member 29 transmits this movement in turn via the pivot bearing 38 to the excitation element 22, which is displaced in a direction along the percussion axis S linear and reciprocating movement, the in Fig. 1 a maximum stroke length H1 (cf. Fig. 1 ) having.
- the already mentioned adjusting device 30 for the stroke of the excitation element 22 has, in addition to the adjusting element 31, an actuating element 34, the z. B. is designed as knurling or thumbwheel.
- the actuator 34 is externally accessible to the power tool 10 and is z. B. manually operated.
- Via a rotary actuation of the actuating element 34 the adjusting element 31, which is guided displaceably on rod-shaped guide elements 32, continuously between a first, the eccentric 17 near end position (see Fig.
- the adjustment element 31 also changes the position of the lifting body 25 along the eccentric pin 18 and along the longitudinal extension of the wobble member 29, so that the tumbling angle of the wobble member 29 is also determined by the lifting body 25 is infinitely variable. Due to the stepless adjustability of the wobble angle between a maximum wobble angle alpha_1 (see Fig. 1 ) and a minimum wobble angle alpha_2 (see Fig. 2 ) is also the maximum stroke of the excitation element 22 continuously adjustable between a maximum stroke length H1 (see Fig. 1 ) and a minimum stroke length H2 (see Fig. 2 ).
- the adjustment of the stroke length of the excitation element 22 is possible due to the stepless adjustability even during operation of the power tool 10, so that it can be reacted directly to changes in the physical properties of the substrate to be processed or workpiece. This is z. B. then the case when drilling a hammer was first drilled with the power tool 10 and then meets the percussion drill on the lying under the plaster brick wall.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
Description
Die Erfindung betrifft eine Handwerkzeugmaschine mit pneumatischem Schlagwerk der im Oberbegriff von Patentanspruch 1 genannten Art. Derartige Handwerkzeugmaschinen sind z. B. als Meissel- oder Kombihammer ausgebildet.The invention relates to a hand tool with pneumatic percussion referred to in the preamble of claim 1. Art. Such hand tool machines are z. B. formed as a chisel or combi hammer.
Aus der
Von Nachteil bei dem Gegenstand der
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Handwerkzeugmaschine der oben genannten Art bereitzustellen, die die genannten Nachteile vermeidet.The present invention has for its object to provide a hand tool of the type mentioned above, which avoids the disadvantages mentioned.
Diese Aufgabe wird erfindungsgemäss durch die in Anspruch 1 genannten Massnahmen erreicht. Demnach weist die Verstelleinrichtung ein entlang der Längserstreckung des Taumelgliedes versetzbares Verstellelement zur stufenlosen Verstellung des Taumelwinkels des Taumelgliedes auf, wodurch ebenfalls eine stufenlose Verstellung des Hubweges des Erregerkolbens ermöglicht wird. Durch die stufenlose Regelbarkeit wird es ferner möglich, eine Verstellung auch im Betrieb der Handwerkzeugmaschine durchzuführen. Das Schlagwerk der Handwerkzeugmaschine kann so im Betrieb an veränderte physikalische Eigenschaften des zu bearbeitenden Werkstoffes anpassen, z. B. beim Übergang von Putz zu Ziegel oder Beton.This object is achieved according to the invention by the measures mentioned in claim 1. Accordingly, the adjusting device has a displacement element displaceable along the longitudinal extension of the wobble element for the stepless adjustment of the wobble angle of the wobble element, whereby likewise a stepless adjustment of the stroke of the excitation piston is made possible. Due to the stepless controllability, it is also possible to perform an adjustment during operation of the power tool. The percussion of the power tool can adapt so in operation to changed physical properties of the material to be machined, z. B. in the transition from plaster to brick or concrete.
Durch die stufenlose Verstellbarkeit des Hubweges des Erregerkolbens wird es ferner möglich, das Schlagwerk an unterschiedliche Werkzeug- bzw. Bohrerdurchmesser anzupassen.Due to the stepless adjustability of the stroke of the exciter piston, it is also possible to adjust the percussion to different tool or drill diameter.
In einer vorteilhaft konstruktiv einfachen Lösung ist ein Hubkörper vorgesehen, über den eine Hubbewegung auf das Taumelglied übertragbar ist, wobei der Hubkörper über das Verstellelement entlang einer Längserstreckung des Taumelgliedes relativ zu diesem versetzbar ist. Der Hubkörper dient dabei nicht nur der Übertragung der vom Motor gelieferten Bewegungsenergie auf das Taumelglied, sondern er ist wie das Verstellelement Teil der Verstelleinrichtung zur Verstellung des Bewegungshubes des Erregerkolbens, durch das der maximal mögliche Taumelwinkel des Taumelgliedes verstellbar ist.In an advantageous simple design solution, a lifting body is provided, via which a lifting movement is transferable to the wobble member, wherein the lifting body via the adjusting element along a longitudinal extent of the wobble member is displaceable relative to this. The lifting body not only serves to transmit the kinetic energy delivered by the motor to the wobble member, but, like the adjusting element, it is part of the adjusting device for adjusting the movement stroke of the exciter piston, by means of which the maximum possible wobble angle of the wobble member is adjustable.
Günstig ist es dabei, wenn der Hubkörper eine Lageraufnahme aufweist, durch die das Taumelglied hindurchgeführt ist, um auf konstruktiv einfache Weise eine Bewegungskopplung von Hubkörper und Taumelglied entlang der Hubachse des Hubkörpers zu verwirklichen.It is advantageous if the lifting body has a bearing receptacle through which the wobble member is guided in order to realize in a structurally simple manner a movement coupling of the lifting body and the wobble member along the stroke axis of the lifting body.
Vorteilhaft weist der Hubkörper ein Langloch für einen rotierbaren Excenterzapfen auf, der in Längsrichtung des Hubkörpers von der Lageraufnahme für das Taumelglied beabstandet ist, wobei der Hubkörper über das Verstellelement entlang der Längserstreckung des Excenterzapfens axial versetzbar ist. So kann auf technisch einfache Weise eine über den Excenterzapfen vom Motor kommende Drehbewegung in eine Hubbewegung des Hubkörpers umgewandelt werden. Der Excenterzapfen ist länglich ausgebildet, um einen Eingriff in das Langloch des Hubkörpers in allen Verstell-Positionen des Hubkörpers zu gewährleisten.Advantageously, the lifting body on a slot for a rotatable eccentric pin, which is spaced in the longitudinal direction of the lifting body of the bearing support for the wobble member, wherein the lifting body via the adjusting element along the longitudinal extension of the eccentric pin is axially displaceable. Thus, in a technically simple manner, a rotational movement coming from the engine via the eccentric pin can be converted into a lifting movement of the lifting body. The eccentric pin is elongated to ensure engagement in the slot of the lifting body in all adjustment positions of the lifting body.
Günstigerweise ist das Taumelglied über eine Schwenkhülse in der Lageraufnahme im Hubkörper verschwenkbar gelagert, wodurch eine verschleissarme Lagerung gewährleistet wird.Conveniently, the wobble member is pivotally mounted via a pivot sleeve in the bearing receptacle in the lifting body, whereby a low-wear storage is ensured.
Vorteilhaft weist die Schwenkhülse eine kugelförmige äussere Gestalt und die Lageraufnahme eine zur Krümmung der kugelförmigen äusseren Gestalt der Schwenkhülse korrespondierende Innenkontur auf. Hierdurch wird eine verlustarme Schwenkbewegung des Taumelgliedes relativ zum Hubkörper ermöglicht bei gleichzeitiger Ermöglichung einer Verstellbewegung des Hubkörpers relativ zum Taumelglied, wenn der Hubkörper über das Verstellelement in seiner Lage entlang der Längserstreckung des Taumelgliedes versetzt wird.Advantageously, the pivot sleeve on a spherical outer shape and the bearing receiving a corresponding to the curvature of the spherical outer shape of the pivot sleeve inner contour. As a result, a low-loss pivoting movement of the wobble member is made possible relative to the lifting body while allowing an adjustment of the lifting body relative to the wobble member when the lifting body is displaced over the adjusting element in its position along the longitudinal extension of the wobble member.
In einer vorteilhaften, technisch einfachen Lösung ist ein manuell betätigbares Betätigungselement für das Verstellelement vorgesehen, über die ein Bediener der Handwerkzeugmaschine auf einfache Weise den Taumelwinkel des Taumelgliedes und damit den Hub des Erregerkolbens verstellen kann.In an advantageous, technically simple solution, a manually operable actuating element for the adjusting element is provided, via which an operator of the power tool can easily adjust the wobble angle of the wobble member and thus the stroke of the exciter piston.
Von Vorteil ist es dabei, wenn das Verstellelement ein erstes Verstellglied aufweist, das bewegungsgekoppelt ist mit einem am Betätigungselement angeordneten zweiten Verstellglied, wodurch eine konstruktiv einfache Bewegungskopplung zwischen dem Betätigungselement und dem Verstellelement der Verstelleinrichtung erreicht wird.It is advantageous if the adjusting element has a first adjusting member which is coupled in terms of movement with a second adjusting member arranged on the actuating element, whereby a structurally simple movement coupling between the actuating element and the adjusting element of the adjusting device is achieved.
In einer vorteilhaft leicht zu bedienenden Variante ist das Betätigungselement dabei als Stellrad ausgebildet.In an advantageous easy-to-use variant, the actuating element is designed as a thumbwheel.
Vorteilhaft weist ein dem Erregerelement abgewandtes Ende des Taumelglieds ein Lagerelement auf, das an einem Gegenlagerelement schwenkbar und bezogen auf seine Längserstreckung axial fest gelagert ist, wodurch eine verschleissarme und langlebige Schwenklagerung des Taumelgliedes erreicht wird. Das Lagerelement ist dabei vorteilhaft als Kugelkopf ausgebildet, das in dem als Gelenkpfanne ausgebildeten Gegenlagerelement schwenkbar aber axial fest (bezogen auf seine Längserstreckung) gelagert ist.Advantageously, an end facing away from the exciter element of the wobble member on a bearing element which is pivotally mounted on an abutment element and axially fixed relative to its longitudinal extension, whereby a low-wear and durable pivotal mounting of the wobble member is achieved. The bearing element is advantageously designed as a ball head, which is mounted in the counter-bearing element designed as a socket but pivotally fixed axially (based on its longitudinal extent).
In den Zeichnungen ist die Erfindung in einem Ausführungsbeispiel dargestellt.In the drawings, the invention is shown in one embodiment.
Es zeigen:
- Fig. 1
- eine erfindungsgemässe Handwerkzeugmaschine mit einem pneumatischen Schlagwerk und einer Verstelleinrichtung für den Hub des Erregerelements im teilweisen Längsschnitt, mit der Verstelleinrichtung in einer ersten Verstellposition,
- Fig. 2
- die Handwerkzeugmaschine aus
Fig. 1 mit der Verstelleinrichtung in einer weiteren Verstellposition, - Fig. 3
- ein Detail der Handwerkzeugmaschine im Schnitt gemäss der Linie II - II aus
Fig. 2 .
- Fig. 1
- a hand-held power tool according to the invention with a pneumatic impact mechanism and an adjusting device for the stroke of the excitation element in a partial longitudinal section, with the adjusting device in a first adjustment position,
- Fig. 2
- the hand tool
Fig. 1 with the adjusting device in a further adjustment position, - Fig. 3
- a detail of the power tool in section according to the line II - II off
Fig. 2 ,
In den
Das Schlagwerk 20 weist ein Führungsrohr 21 auf, in dem ein als Erregerkolben ausgebildetes Erregerelement 22 hin und her bewegbar geführt ist. Das Führungsrohr 21 kann zur Vereinfachung der Montage auch zwei- oder mehrteilig ausgebildet sein. Das Schlagwerk 20 definiert eine zentrale Schlagwerksachse S die zentrisch durch das Führungsrohr 21 und die in dem Führungsrohr 21 bewegten Elemente (Erregerelement 22 etc.) verläuft. In dem Führungsrohr 21 ist ferner noch ein als Flugkolben ausgebildetes Schlagelement 23 axial versetzbar gelagert. Das Schlagelement 23 ist über den Erregerkolben und die zwischen ihm und dem Erregerelement 22 liegende Luftfeder 24 ebenfalls in eine oszillierende Hubbewegung versetzbar. Das Schlagelement 23 schlägt dabei im Schlag-Betrieb der Handwerkzeugmaschine 10 auf einen Döpper (in den Figuren nicht dargestellt), der seinerseits auf ein Werkzeug (in den Figuren nicht dargestellt) schlägt. Alternativ schlägt das Schlagelement 23 direkt auf das Ende eines Werkzeuges. Die Luftfeder 24 bzw. Gasfeder (je nach dem eingesetzten Gas oder Gasgemisch) zwischen dem Erregerelement 22 und dem Schlagelement 23 kann dabei über Schaltmittel (in den Figuren nicht dargestellt) an- und abschaltbar ausgebildet sein.The
Das Erregerelement 22 ist zur Erzeugung einer Hubbewegung im Betrieb der Handwerkzeugmaschine 10 mit einem schwenkbar an diesem gelagerten Taumelglied 29 des Taumelantriebs 13 verbunden (am Schwenklager 38). Auf dem Taumelglied 29 ist dabei eine Schwenkhülse 28 verschieblich geführt, die umfänglich eine Kugelform aufweist und die in einer Lageraufnahme 27 in einem scheibenförmigen Hubkörper 25 des Taumelantriebs 13 schwenkbeweglich gelagert ist. Der Hubkörper 25 seinerseits ist entlang seiner Längserstreckung mit einem als Schwalbenschwanzvorsprung ausgebildeten Vorsprung verschieblich in einer als Schwalbenschwanz-Nut ausgebildeten Führungsnut 33 eines Verstellelements 31 einer insgesamt mit 30 bezeichneten Verstelleinrichtung für den Hub des Erregerelements 22 geführt. Der Hubkörper 25 weist an seinem der Lageraufnahme 27 abgewandten Endbereich ein sich quer zu seiner Längserstreckung ausgerichtetes Langloch 26 auf, durch das ein länglicher Excenterzapfen 18 hindurchgreift, der zusammen mit einem Excenterrad 17 drehfest auf einer Lagerwelle 19 sitzt. Das Excenterrad 17 kämmt dabei mit seinem Aussengewinde ein Gewinde des Abtriebs 15 des Motors 12. Das z. B. als länglicher Rundstab ausgebildete Taumelglied 29 weist an seinem dem Erregerelement 22 abgewandten Ende ein als Kugelkopf ausgebildetes Lagerelement 39 auf, das in einem als Gelenkpfanne ausgebildeten Gegenlagerelement 40 schwenkbar aber axial fest (bezogen auf seine Längserstreckung) gelagert ist.The
Im Betrieb der Handwerkzeugmaschine wird eine Drehbewegung des Motors 12 durch diese Anordnung zunächst auf das Excenterrad 17 mit dem Excenterzapfen 18 übertragen (Drehrichtung 16 in
Die bereits erwähnte Verstelleinrichtung 30 für den Hub des Erregerelements 22 weist neben dem Verstellelement 31 noch ein Betätigungselement 34 auf, das z. B. als Rändel- oder Stellrad ausgebildet ist. Das Betätigungselement 34 ist dabei aussen an der Handwerkzeugmaschine 10 zugänglich und ist z. B. manuell betätigbar. Ein als Zahnrad ausgebildetes zweites Verstellglied 36, das an dem Betätigungselement 34 angeordnet ist, kämmt ein als Zahnstange ausgebildetes erstes Verstellglied 35, das fest an dem Verstellelement 31 angeordnet ist. Über eine Drehbetätigung des Betätigungselementes 34 kann das Verstellelement 31, welches an stabförmigen Führungselementen 32 verschieblich geführt ist, stufenlos zwischen einer ersten, dem Excenterrad 17 nahen Endposition (siehe
Claims (10)
dadurch gekennzeichnet,
dass die Verstelleinrichtung (30) ein entlang der Längserstreckung des Taumelgliedes (29) versetzbares Verstellelement (31) zur stufenlosen Verstellung des Taumelwinkels des Taumelgliedes (29) aufweist.Hand tool with a motor (12) drivable pneumatic percussion (20), which defines a central percussion axis (S) and a in a guide tube (21) back and forth movable exciter element (22) and one in the guide tube (21) displaceable guided and by means of an air spring (24) via the excitation element (22) drivable impact element (23), wherein the excitation element (22) via a motor-operated elongated wobble member (29) is displaceable in a reciprocating motion and wherein an adjusting device ( 30) is provided for the movement stroke of the excitation element (22) via which a wobble angle of the wobble member (29) is adjustable,
characterized,
that the adjusting device (30) along the longitudinal extension of the wobble member (29) displaceable adjusting element (31) for continuous variation of the wobble angle of the wobble member (29).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007000391A DE102007000391A1 (en) | 2007-07-19 | 2007-07-19 | Hand tool with percussion |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2017039A2 true EP2017039A2 (en) | 2009-01-21 |
EP2017039A3 EP2017039A3 (en) | 2012-09-05 |
Family
ID=39821582
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08104150A Withdrawn EP2017039A3 (en) | 2007-07-19 | 2008-05-29 | Powered hand-tool with percussion mechanism |
Country Status (4)
Country | Link |
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US (1) | US7802711B2 (en) |
EP (1) | EP2017039A3 (en) |
JP (1) | JP2009023085A (en) |
DE (1) | DE102007000391A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8636081B2 (en) | 2011-12-15 | 2014-01-28 | Milwaukee Electric Tool Corporation | Rotary hammer |
JP2012223870A (en) * | 2011-04-21 | 2012-11-15 | Makita Corp | Impact tool |
DE102012206445A1 (en) * | 2012-04-19 | 2013-10-24 | Hilti Aktiengesellschaft | machine tool |
WO2014034862A1 (en) * | 2012-09-03 | 2014-03-06 | 株式会社マキタ | Impact tool |
EP2886259A1 (en) * | 2013-12-18 | 2015-06-24 | HILTI Aktiengesellschaft | Driving device |
US10814468B2 (en) | 2017-10-20 | 2020-10-27 | Milwaukee Electric Tool Corporation | Percussion tool |
EP3743245B1 (en) | 2018-01-26 | 2024-04-10 | Milwaukee Electric Tool Corporation | Percussion tool |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3205141A1 (en) | 1982-02-13 | 1983-08-18 | Robert Bosch Gmbh, 7000 Stuttgart | DRILLING HAMMER |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3603406A (en) * | 1969-09-25 | 1971-09-07 | Gkn Screws Fasteners Ltd | Explosive operated power tool with impact and rotation |
US3948051A (en) * | 1974-08-01 | 1976-04-06 | Marshall Don J | Fluid pressure amplifier |
US4091981A (en) * | 1975-08-21 | 1978-05-30 | Hitachi Koki Company, Limited | Power driven percussion tool |
DE2917475A1 (en) * | 1979-04-30 | 1980-11-13 | Hilti Ag | DRILLING OR CHISEL HAMMER |
DE3119956C2 (en) * | 1981-05-20 | 1984-11-22 | Joh. Friedrich Behrens AG, 2070 Ahrensburg | Sound-damped driving tool for fasteners |
SE436988B (en) * | 1983-07-01 | 1985-02-04 | Nilsson Goran Alfred | NAL HACK DEVICE NAL HACK DEVICE |
DE3502977A1 (en) * | 1985-01-30 | 1986-07-31 | Robert Bosch Gmbh, 7000 Stuttgart | PRINTED DRIVER |
DE3505544A1 (en) * | 1985-02-18 | 1986-08-21 | Hilti Ag, Schaan | Hammer drill |
DE4121279A1 (en) * | 1991-06-27 | 1993-01-07 | Bosch Gmbh Robert | DRILL AND / OR SLOPE |
US6041603A (en) * | 1997-12-31 | 2000-03-28 | Porter-Cable Corporation | Internal combustion fastener driving tool accelerator plate |
USD410182S (en) * | 1997-12-31 | 1999-05-25 | Porter-Cable Corporation | Internal combustion fastener driving tool |
DE19856638A1 (en) * | 1998-12-03 | 2000-06-08 | Black & Decker Inc | Drive for electric tool, especially percussion drill, has wobble finger protruding from wobble ring of wobble plate arrangement that engages lateral holder in reciprocating component |
DE102007000255A1 (en) * | 2007-05-03 | 2008-11-06 | Hilti Aktiengesellschaft | Hand tool with lubricated striking mechanism |
-
2007
- 2007-07-19 DE DE102007000391A patent/DE102007000391A1/en not_active Withdrawn
-
2008
- 2008-05-29 EP EP08104150A patent/EP2017039A3/en not_active Withdrawn
- 2008-07-16 US US12/218,665 patent/US7802711B2/en not_active Expired - Fee Related
- 2008-07-17 JP JP2008186059A patent/JP2009023085A/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3205141A1 (en) | 1982-02-13 | 1983-08-18 | Robert Bosch Gmbh, 7000 Stuttgart | DRILLING HAMMER |
Also Published As
Publication number | Publication date |
---|---|
JP2009023085A (en) | 2009-02-05 |
US20090020302A1 (en) | 2009-01-22 |
DE102007000391A1 (en) | 2009-01-22 |
EP2017039A3 (en) | 2012-09-05 |
US7802711B2 (en) | 2010-09-28 |
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