EP1817139B1 - Manual machine tool handle device comprising a vibration-shielding unit - Google Patents

Manual machine tool handle device comprising a vibration-shielding unit Download PDF

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Publication number
EP1817139B1
EP1817139B1 EP05743127A EP05743127A EP1817139B1 EP 1817139 B1 EP1817139 B1 EP 1817139B1 EP 05743127 A EP05743127 A EP 05743127A EP 05743127 A EP05743127 A EP 05743127A EP 1817139 B1 EP1817139 B1 EP 1817139B1
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EP
European Patent Office
Prior art keywords
power tool
portable power
handle device
tool handle
force
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.)
Not-in-force
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EP05743127A
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German (de)
French (fr)
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EP1817139A1 (en
Inventor
Hubert Steinke
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP1817139A1 publication Critical patent/EP1817139A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/006—Vibration damping means
    • 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
    • B25D17/04—Handles; Handle mountings
    • B25D17/043—Handles resiliently mounted relative to the hammer housing

Definitions

  • the invention relates to a handheld power tool grip device having a vibration shielding unit according to the preamble of claim 1 and to a handheld power tool according to the preamble of claim 12.
  • Generic handheld power tool grip devices usually comprise a pivotably mounted about a pivot axis or equipped with at least two degrees of freedom grip element.
  • the invention relates to a hand tool gripping device with a vibration shielding and a
  • Guide device for guiding a movement of a relative to a hand tool body movably mounted handle member.
  • the movement is at least substantially rectilinear. It can thereby be achieved that impact pulses of a hand tool machine comprising the handheld power tool grip device are shielded via a rectilinear movement, preferably in the direction of the impact pulse, independently of a direction in which an operator applies a support force to the operating element. An immediate transmission of the impact pulse or a component thereof via a joint or via a pivotable mounting can be avoided. Furthermore, tilting and consequent tilting of the gripping element can be avoided without having to forego a robustness required in a construction site operation.
  • the vibration shielding unit can be designed as a resilient vibration shielding unit that reflects individual pulses of vibration back into the handheld power tool body and / or transmits low pass filtered from the handheld power tool body onto the grip element.
  • the vibration shielding unit may be implemented as a vibration damping or vibration absorbing unit capable of dissipating a registered vibration energy. Particularly advantageous embodiments of the invention, in which the vibration shielding a first portion of the vibration energy dissipates and reflects another portion of the vibrational energy.
  • the grip element is spaced from a housing of the power tool body.
  • blockage of the movement by dust particles and / or shavings which can become lodged between the grip element and the hand tool body can be avoided. Dirt, which can occur especially in a construction site, can be easily removed.
  • a conditional by the distance frame can be protected to avoid contamination by elastic and / or displaceably mounted in the direction of movement covering.
  • the handheld power tool grip device has at least two crossing force transmission elements. As a result, transverse forces exerted on the grip element can be supported particularly effectively.
  • a particularly secure guidance of the movement of the grip element can be achieved if the force transmission elements are pivotally connected to one another by a connecting element, in particular by the connecting element which is arranged in a central region of the force transmission elements, so that the force transmission elements can perform a scissor movement.
  • the connecting element can be particularly advantageously formed on at least one of the force transmission elements.
  • an always defined starting position can be achieved from which a particularly effective vibration shield can be reached.
  • a particularly comfortable vibration shielding can be achieved if the handheld power tool grip device comprises at least one elastically deformable shock absorption element.
  • cost saving potentials can be tapped if the return element and the shock absorption element are made in one piece.
  • impact-absorbing elements it is possible to use, for example, various elastomers that appear appropriate to a person skilled in the art, for example also with a foam rubber structure.
  • An impairment of the leadership properties of the power tool grip device by the restoring element can be avoided if the restoring element acts on at least one force transmission element, particularly advantageously on at least two power transmission elements. It can thereby be achieved that a force of the restoring element is strengthened or weakened by means of a lever effect and can be advantageously adapted to customer requirements by selecting a point of application of the force.
  • the grip element has a D-shape, a particularly advantageous handling of the handheld power tool can be achieved.
  • an on / off switch of the power tool can be protected against uncontrolled forces, for example due to impacts.
  • FIG. 1 shows a trained as a hammer hammer hand tool with a hand tool body 14, a tool chuck 34 and a clamped tool 36.
  • An integrated into the power tool body 14, not shown here striking mechanism is driven by a motor 38 of the hammer drill and generates axial impact pulses in a direction 40 on the tool 36.
  • the power tool body 14 On a side facing away from the tool 36, the power tool body 14 has a D-shaped grip element 16 with an on / off switch 42 arranged on an inner side of the grip element 16.
  • the grip element 16 is displaceably mounted on the hand tool body 14 in the working direction 40.
  • a movement 26 of the grip element 16 is guided by a guide device 12 in a straight line in the working direction 40, so that an operator can move the grip element 16 counter to a spring force relative to the hand tool body 14 in the working direction 40.
  • the spring force is generated by a vibration shielding unit 10 which, in addition to the guide device 12, comprises a restoring element 30 designed as a spiral spring ( FIG. 2 ).
  • FIG. 2 shows schematically a section through the handle member 16 and the vibration shielding unit 10.
  • the handle member 16 is spaced from a housing of the power tool body 14 at about 1 - 1.5 cm.
  • a gap between the handle member 16 and the hand tool body 14 is slidably supported by in the direction of movement 26, an edge of the power tool body 14 overlaps overlapping covering means.
  • the guide device 12 consists essentially of two intersecting force transmission elements 20, 22, which are formed as stamped / bent parts and which are connected in a central region by a bolt designed as a connecting element 24 like a scissor-like pivotally.
  • the right end of the rod-shaped power transmission elements 20, 22, these are each pivotally mounted on further bolts 44, 46, namely the first power transmission element 20 on a housing 18 of the power tool body 14 and the second power transmission element 22 on the handle element sixteenth
  • the left end is the first power transmission element 20 via a third pin 48 which engages in a direction perpendicular to the movement 26 and the working direction 40 elongated hole 54, slidably mounted on the handle member 16, wherein a direction 28 corresponds to the displacement of the direction of the elongated hole 54.
  • the second power transmission element 22 via a fourth pin 50 which engages in a direction perpendicular to the movement 26 and the working direction 40 aligned slot 56, slidably mounted in the direction of the elongated hole 56 on the housing 18.
  • the bolts 48, 50 move in their respective oblong holes 54, 56 perpendicular to the working direction 40 or to the movement 26 of the grip element 16 until the bolts 48, 50 move to a position in FIG FIG. 2 left end of the slots 54, 56 abut.
  • the movement 26 is limited in the working direction 40.
  • the right ends of the elongated holes 54, 56 limit the movement 26 against the working direction 40.
  • the power transmission members 20, 22 pivot about the connecting member 24, compressing or decompressing the compression spring of the vibration shield unit 10 and the return member 30 disposed between the connecting member 24 and the grip member 16, respectively.
  • the return element 30 generates the spring force of the vibration shielding unit 10.
  • the restoring element 30 sets the grip element 16 counter to the working direction 40 into a starting position defined by the left ends of the elongated holes 54, 56 with the greatest possible distance between the grip element 16 and the housing 18.
  • a shock pulse generated by the impact mechanism is at least partially reflected by a workpiece
  • the impact pulse can travel via the tool 36 and the tool chuck 34 into the housing 18 of the hand tool body 14, which thereby accelerates counter to the working direction 40.
  • an operator exerts a force on the grip element 16 that has at least one component in the working direction 40, it moves as a result of the reflected portion of the impact pulse the housing 18 against the force of the compression spring or the return element 30 in the direction of the handle member 16 which moves guided by the guide device 12 relative to the housing 18.
  • a force transmitted to the handle member 16 via the return member 30 slowly increases as compared with a timing of the beat pulse, and is supported by the operator so that the operator can intercept the shock pulse over a prolonged period of time.
  • the guide device 12 with the restoring element 30 acts as a vibration shielding unit 10, which filters out high-frequency components of a vibration of the hand tool body 14.
  • the restoring element 30 simultaneously serves as a shock absorbing element 32, embodiments of the invention are also conceivable in which a separate from the restoring element 30 shock absorbing element 32 is present.
  • FIG. 3 shows an alternative vibration shielding unit 10, in which the restoring element 30 is formed as a tension spring which engages in each case on a grip element 16 facing half of force transmission elements 20, 22.
  • the tension spring is in a starting position of the grip element 16 under a bias.
  • FIG. 4 shows an embodiment of the invention, in addition to the features of in FIG. 3 illustrated embodiment designed as a rubber component shock absorption element 32, which simultaneously forms a return element 30, and is arranged between a bolt formed as a connecting element 24 and a housing 18 of a device comprising hammer drill.
  • the return element 30 may be supported by a tension spring 52 shown in dashed lines in its effect.
  • Embodiments of the invention are conceivable in which a plurality of, in particular identical, vibration shielding units 10 are arranged over a longitudinal extent of the grip element 16. Furthermore, embodiments of the invention are conceivable with alternative impact absorption units which appear to the person skilled in the art to be sensible, for example with an inelastically deformable material or with hydraulic shock absorbers.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Handwerkzeugmaschinengriffvorrichtung mit einer Vibrationsabschirmeinheit nach dem Oberbegriff des Anspruchs 1 und von einer Handwerkzeugmaschine nach dem Oberbegriff des Anspruchs 12.The invention relates to a handheld power tool grip device having a vibration shielding unit according to the preamble of claim 1 and to a handheld power tool according to the preamble of claim 12.

Als nächstliegender Stand der Technik wird das Dokument GB 2 171 045 A betrachtet.The closest prior art is the document GB 2 171 045 A considered.

Es ist bereits vorgeschlagen worden, eine Handwerkzeugmaschine mit einer Handwerkzeugmaschinengriffvorrichtung auszustatten, die eine Vibrationsabschirmeinheit umfasst. Gattungsgemäße Handwerkzeugmaschinengriffvorrichtungen umfassen üblicherweise ein um eine Schwenkachse schwenkbar gelagertes oder ein mit zumindest zwei Bewegungsfreiheitsgraden ausgestattetes Griffelement.It has already been proposed to provide a hand tool machine with a hand tool machine handle device comprising a vibration shield unit. Generic handheld power tool grip devices usually comprise a pivotably mounted about a pivot axis or equipped with at least two degrees of freedom grip element.

Vorteile der ErfindungAdvantages of the invention

Die Erfindung geht aus von einer Handwerkzeugmaschinengriffvorrichtung mit einer Vibrationsabschirmeinheit und einerThe invention relates to a hand tool gripping device with a vibration shielding and a

Führungsvorrichtung zum Führen einer Bewegung eines relativ zu einem Handwerkzeugmaschinenkörper beweglich gelagerten Griffelements.Guide device for guiding a movement of a relative to a hand tool body movably mounted handle member.

Es wird vorgeschlagen, dass die Bewegung zumindest im Wesentlichen geradlinig ist. Dadurch kann erreicht werden, dass Schlagimpulse einer die Handwerkzeugmaschinengriffvorrichtung umfassenden Handwerkzeugmaschine unabhängig von einer Richtung, in der ein Bediener eine Stützkraft auf das Bedienelement ausübt, über eine geradlinige Bewegung, vorzugsweise in Richtung des Schlagimpulses, abgeschirmt wird. Eine unmittelbare Übertragung des Schlagimpulses oder einer Komponente desselben über ein Gelenk oder über eine schwenkbare Lagerung kann vermieden werden. Ferner kann ein Verkippen und ein dadurch bedingtes Verkanten des Griffelements vermieden werden, ohne dabei auf eine in einem Baustellenbetrieb notwendige Robustheit verzichten zu müssen.It is proposed that the movement is at least substantially rectilinear. It can thereby be achieved that impact pulses of a hand tool machine comprising the handheld power tool grip device are shielded via a rectilinear movement, preferably in the direction of the impact pulse, independently of a direction in which an operator applies a support force to the operating element. An immediate transmission of the impact pulse or a component thereof via a joint or via a pivotable mounting can be avoided. Furthermore, tilting and consequent tilting of the gripping element can be avoided without having to forego a robustness required in a construction site operation.

Als geradlinige Bewegung soll in diesem Zusammenhang eine rein translatorische Bewegung in der Art einer Parallelverschiebung bezeichnet werden. Die Vibrationsabschirmeinheit kann einerseits als federelastische Vibrationsabschirmeinheit ausgeführt sein, die Einzelimpulse einer Vibration zurück in den Handwerkzeugmaschinenkörper reflektiert und/oder tiefpassgefiltert aus dem Handwerkzeugmaschinenkörper auf das Griffelement überträgt. Andererseits kann die Vibrationsabschirmeinheit als Vibrationsdämpfungs- oder Vibrationsabsorptionseinheit ausgeführt sein, die dazu geeignet ist, eine eingetragene Vibrationsenergie zu dissipieren. Besonders vorteilhaft sind Ausgestaltungen der Erfindung, in denen die Vibrationsabschirmeinheit einen ersten Anteil der Vibrationsenergie dissipiert und einen weiteren Anteil der Vibrationsenergie reflektiert.As a linear movement should be referred to in this context, a purely translational movement in the manner of a parallel shift. On the one hand, the vibration shielding unit can be designed as a resilient vibration shielding unit that reflects individual pulses of vibration back into the handheld power tool body and / or transmits low pass filtered from the handheld power tool body onto the grip element. On the other hand, the vibration shielding unit may be implemented as a vibration damping or vibration absorbing unit capable of dissipating a registered vibration energy. Particularly advantageous embodiments of the invention, in which the vibration shielding a first portion of the vibration energy dissipates and reflects another portion of the vibrational energy.

In einer Ausgestaltung der Erfindung wird vorgeschlagen, dass das Griffelement von einem Gehäuse des Handwerkzeugmaschinenkörpers beabstandet ist. Dadurch kann ein Blockieren der Bewegung durch Staubpartikel und/oder Späne, die sich zwischen dem Griffelement und dem Handwerkzeugmaschinenkörper festsetzen können, vermieden werden. Verschmutzungen, die insbesondere in einem Baustellenbetrieb auftreten können, können leicht entfernt werden. Ein durch den Abstand bedingter Spant kann zur Vermeidung von Verschmutzungen durch elastische und/oder in der Richtung der Bewegung verschiebbar gelagerte Abdeckmittel geschützt sein.In one embodiment of the invention it is proposed that the grip element is spaced from a housing of the power tool body. As a result, blockage of the movement by dust particles and / or shavings which can become lodged between the grip element and the hand tool body can be avoided. Dirt, which can occur especially in a construction site, can be easily removed. A conditional by the distance frame can be protected to avoid contamination by elastic and / or displaceably mounted in the direction of movement covering.

Ferner wird vorgeschlagen, dass die Handwerkzeugmaschinengriffvorrichtung zumindest zwei sich überkreuzende Kraftübertragungselemente aufweist. Dadurch können auf das Griffelement ausgeübte Querkräfte besonders effektiv abgestützt werden.It is also proposed that the handheld power tool grip device has at least two crossing force transmission elements. As a result, transverse forces exerted on the grip element can be supported particularly effectively.

Dabei ist eine besonders sichere Führung der Bewegung des Griffelements erreichbar, wenn die Kraftübertragungselemente durch ein Verbindungselement schwenkbar miteinander verbunden sind, und zwar insbesondere durch das Verbindungselement, das in einem mittleren Bereich der Kraftübertragungselemente angeordnet ist, so dass die Kraftübertragungselemente eine Scherenbewegung ausführen können. Das Verbindungselement kann dabei besonders vorteilhaft an zumindest eines der Kraftübertragungselemente angeformt sein.In this case, a particularly secure guidance of the movement of the grip element can be achieved if the force transmission elements are pivotally connected to one another by a connecting element, in particular by the connecting element which is arranged in a central region of the force transmission elements, so that the force transmission elements can perform a scissor movement. The connecting element can be particularly advantageously formed on at least one of the force transmission elements.

Durch zumindest ein elastisches Rückstellelement zum Rückstellen des Griffelements kann eine stets definierte Ausgangsposition erreichbar sein, aus der heraus eine besonders effektive Vibrationsabschirmung erreichbar ist.By means of at least one elastic return element for returning the gripping element, an always defined starting position can be achieved from which a particularly effective vibration shield can be reached.

Eine besonders komfortable Vibrationsabschirmung kann erreicht werden, wenn die Handwerkzeugmaschinengriffvorrichtung zumindest ein elastisch verformbares Stoßabsorptionselement umfasst. Dabei können Kosteneinsparungspotenziale erschlossen werden, wenn das Rückstellelement und das Stoßabsorptionselement einstückig ausgeführt sind. Als Stoßabsorptionselemente können beispielsweise verschiedene, dem Fachmann als sinnvoll erscheinende Elastomere, beispielsweise auch mit einer Moosgummistruktur, Verwendung finden.A particularly comfortable vibration shielding can be achieved if the handheld power tool grip device comprises at least one elastically deformable shock absorption element. In this case, cost saving potentials can be tapped if the return element and the shock absorption element are made in one piece. As impact-absorbing elements, it is possible to use, for example, various elastomers that appear appropriate to a person skilled in the art, for example also with a foam rubber structure.

Eine Beeinträchtigung der Führungseigenschaften der Handwerkzeugmaschinengriffvorrichtung durch das Rückstellelement kann vermieden werden, wenn das Rückstellelement an zumindest einem Kraftübertragungselement, besonders vorteilhaft an zumindest zwei Kraftübertragungselementen, angreift. Dadurch kann erreicht werden, dass eine Kraft des Rückstellelements über eine Hebelwirkung verstärkt oder abgeschwächt ist und sich durch eine Wahl eines Angriffspunkts der Kraft vorteilhaft an Kundenbedürfnisse anpassen lässt.An impairment of the leadership properties of the power tool grip device by the restoring element can be avoided if the restoring element acts on at least one force transmission element, particularly advantageously on at least two power transmission elements. It can thereby be achieved that a force of the restoring element is strengthened or weakened by means of a lever effect and can be advantageously adapted to customer requirements by selecting a point of application of the force.

Ein weiterer Bedienkomfort ist erreichbar, wenn das Griffelement an einer einem Bediener zugewandten Seite einen stoßabsorbierenden und/oder rutschfesten Gummibelag aufweist, der vorteilhaft auch handschweißabsorbierende Eigenschaften haben kann.Another ease of use is achievable when the handle element on a side facing an operator has a shock-absorbing and / or non-slip rubber coating, which can advantageously also have hand-sweat-absorbing properties.

Weist das Griffelement eine D-Form auf, kann eine besonders vorteilhafte Handhabung der Handwerkzeugmaschine erreicht werden. Insbesondere kann ein Ein-/Ausschalter der Handwerkzeugmaschine vor unkontrollierten Krafteinwirkungen, beispielsweise durch Stöße, geschützt sein.If the grip element has a D-shape, a particularly advantageous handling of the handheld power tool can be achieved. In particular, an on / off switch of the power tool can be protected against uncontrolled forces, for example due to impacts.

Zeichnungdrawing

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

Es zeigen:

Fig. 1
einen Bohrhammer mit einer Handwerkzeugmaschi- nengriffvorrichtung, die eine Vibrationsab- schirmeinheit umfasst,
Fig. 2
eine Handwerkzeugmaschinengriffvorrichtung mit einer Vibrationsabschirmeinheit in einer al- ternativen Ausgestaltung der Erfindung und
Fig. 3
eine Handwerkzeugmaschinengriffvorrichtung mit einer Vibrationsabschirmeinheit in einer wei- teren alternativen Ausgestaltung der Erfin- dung.
Show it:
Fig. 1
a hammer drill with a hand tool gripping device comprising a vibration shield unit,
Fig. 2
a hand tool machine handle device with a vibration shielding in an alternative embodiment of the invention and
Fig. 3
a hand tool machine handle device with a vibration shielding unit in a further alternative embodiment of the invention.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Figur 1 zeigt eine als Bohrhammer ausgebildete Handwerkzeugmaschine mit einem Handwerkzeugmaschinenkörper 14, einem Werkzeugfutter 34 und einem eingespannten Werkzeug 36. Ein in den Handwerkzeugmaschinenkörper 14 integriertes, hier nicht dargestelltes Schlagwerk wird von einem Motor 38 des Bohrhammers angetrieben und erzeugt axiale Schlagimpulse in einer Arbeitsrichtung 40 auf das Werkzeug 36. An einer dem Werkzeug 36 abgewandten Seite weist der Handwerkzeugmaschinenkörper 14 ein D-förmiges Griffelement 16 mit einem an einer Innenseite des Griffelements 16 angeordneten Ein-/Ausschalter 42 auf. Das Griffelement 16 ist in der Arbeitsrichtung 40 verschiebbar am Handwerkzeugmaschinenkörper 14 gelagert. FIG. 1 shows a trained as a hammer hammer hand tool with a hand tool body 14, a tool chuck 34 and a clamped tool 36. An integrated into the power tool body 14, not shown here striking mechanism is driven by a motor 38 of the hammer drill and generates axial impact pulses in a direction 40 on the tool 36. On a side facing away from the tool 36, the power tool body 14 has a D-shaped grip element 16 with an on / off switch 42 arranged on an inner side of the grip element 16. The grip element 16 is displaceably mounted on the hand tool body 14 in the working direction 40.

Eine Bewegung 26 des Griffelements 16 ist von einer Führungsvorrichtung 12 geradlinig in Arbeitsrichtung 40 geführt, so dass ein Bediener das Griffelement 16 entgegen einer Federkraft relativ zum Handwerkzeugmaschinenkörper 14 in Arbeitsrichtung 40 verschieben kann. Die Federkraft ist von einer Vibrationsabschirmeinheit 10 erzeugt, die neben der Führungsvorrichtung 12 ein als Spiralfeder ausgebildetes Rückstellelement 30 umfasst (Figur 2).A movement 26 of the grip element 16 is guided by a guide device 12 in a straight line in the working direction 40, so that an operator can move the grip element 16 counter to a spring force relative to the hand tool body 14 in the working direction 40. The spring force is generated by a vibration shielding unit 10 which, in addition to the guide device 12, comprises a restoring element 30 designed as a spiral spring ( FIG. 2 ).

Figur 2 zeigt schematisch einem Schnitt durch das Griffelement 16 und die Vibrationsabschirmeinheit 10. Das Griffelement 16 ist von einem Gehäuse des Handwerkzeugmaschinenkörpers 14 mit etwa 1 - 1,5 cm beabstandet. Ein Spalt zwischen dem Griffelement 16 und dem Handwerkzeugmaschinenkörper 14 ist durch in der Richtung der Bewegung 26 verschiebbar gelagerte, eine Kante des Handwerkzeugmaschinenkörpers 14 überlappende Abdeckmittel überdeckt. FIG. 2 shows schematically a section through the handle member 16 and the vibration shielding unit 10. The handle member 16 is spaced from a housing of the power tool body 14 at about 1 - 1.5 cm. A gap between the handle member 16 and the hand tool body 14 is slidably supported by in the direction of movement 26, an edge of the power tool body 14 overlaps overlapping covering means.

Die Führungsvorrichtung 12 besteht im Wesentlichen aus zwei sich kreuzenden Kraftübertragungselementen 20, 22, die als Stanz-/Biegeblechteile ausgebildet sind und die in einem mittleren Bereich durch ein als Bolzen ausgebildetes Verbindungselement 24 scherenartig schwenkbar miteinander verbunden sind.The guide device 12 consists essentially of two intersecting force transmission elements 20, 22, which are formed as stamped / bent parts and which are connected in a central region by a bolt designed as a connecting element 24 like a scissor-like pivotally.

An einem in der Figur 2 rechten Ende der stangenförmigen Kraftübertragungselemente 20, 22 sind diese jeweils über weitere Bolzen 44, 46 schwenkbar gelagert, und zwar das erste Kraftübertragungselement 20 an einem Gehäuse 18 des Handwerkzeugmaschinenkörpers 14 und das zweite Kraftübertragungselement 22 an dem Griffelement 16.At one in the FIG. 2 the right end of the rod-shaped power transmission elements 20, 22, these are each pivotally mounted on further bolts 44, 46, namely the first power transmission element 20 on a housing 18 of the power tool body 14 and the second power transmission element 22 on the handle element sixteenth

An einem in der Figur 2 linken Ende ist das erste Kraftübertragungselement 20 über einen dritten Bolzen 48, der in ein senkrecht zur Bewegung 26 bzw. zur Arbeitsrichtung 40 ausgerichtetes Langloch 54 eingreift, verschiebbar am Griffelement 16 gelagert, wobei eine Richtung 28 der Verschiebung der Richtung des Langlochs 54 entspricht.At one in the FIG. 2 The left end is the first power transmission element 20 via a third pin 48 which engages in a direction perpendicular to the movement 26 and the working direction 40 elongated hole 54, slidably mounted on the handle member 16, wherein a direction 28 corresponds to the displacement of the direction of the elongated hole 54.

Analog dazu ist das zweite Kraftübertragungselement 22 über einen vierten Bolzen 50, der in ein senkrecht zur Bewegung 26 bzw. zur Arbeitsrichtung 40 ausgerichtetes Langloch 56 eingreift, in der Richtung 28 des Langlochs 56 verschiebbar am Gehäuse 18 gelagert.Similarly, the second power transmission element 22 via a fourth pin 50 which engages in a direction perpendicular to the movement 26 and the working direction 40 aligned slot 56, slidably mounted in the direction of the elongated hole 56 on the housing 18.

Bewegt ein Bediener das Griffelement 16 in Arbeitsrichtung 40, verschieben sich die Bolzen 48, 50 in ihren jeweiligen Langlöchern 54, 56 senkrecht zur Arbeitsrichtung 40 bzw. zur Bewegung 26 des Griffelements 16, bis die Bolzen 48, 50 an ein in Figur 2 linkes Ende der Langlöcher 54, 56 stoßen. Dadurch ist die Bewegung 26 in der Arbeitsrichtung 40 begrenzt. Analog dazu begrenzen die rechten Enden der Langlöcher 54, 56 die Bewegung 26 entgegen der Arbeitsrichtung 40.If an operator moves the grip element 16 in the working direction 40, the bolts 48, 50 move in their respective oblong holes 54, 56 perpendicular to the working direction 40 or to the movement 26 of the grip element 16 until the bolts 48, 50 move to a position in FIG FIG. 2 left end of the slots 54, 56 abut. As a result, the movement 26 is limited in the working direction 40. Similarly, the right ends of the elongated holes 54, 56 limit the movement 26 against the working direction 40.

Während der Bewegung 26 schwenken die Kraftübertragungselemente 20, 22 um das Verbindungselement 24, wobei die zwischen dem Verbindungselement 24 und dem Griffelement 16 angeordnete Druckfeder der Vibrationsabschirmeinheit 10 bzw. das Rückstellelement 30 komprimiert oder dekomprimiert wird. Das Rückstellelement 30 erzeugt die Federkraft der Vibrationsabschirmeinheit 10.During movement 26, the power transmission members 20, 22 pivot about the connecting member 24, compressing or decompressing the compression spring of the vibration shield unit 10 and the return member 30 disposed between the connecting member 24 and the grip member 16, respectively. The return element 30 generates the spring force of the vibration shielding unit 10.

In einem von äußeren Kräften freien Zustand stellt das Rückstellelement 30 das Griffelement 16 entgegen der Arbeitsrichtung 40 in eine durch die linken Enden der Langlöcher 54, 56 definierte Ausgangsposition mit dem größtmöglichen Abstand zwischen dem Griffelement 16 und dem Gehäuse 18.In a state free of external forces, the restoring element 30 sets the grip element 16 counter to the working direction 40 into a starting position defined by the left ends of the elongated holes 54, 56 with the greatest possible distance between the grip element 16 and the housing 18.

Wird ein vom Schlagwerk erzeugter Schlagimpuls von einem Werkstück zumindest teilweise reflektiert, kann der Schlagimpuls über das Werkzeug 36 und das Werkzeugfutter 34 in das Gehäuse 18 des Handwerkzeugmaschinenkörpers 14 wandern, das sich dadurch entgegen der Arbeitsrichtung 40 beschleunigt. Übt ein Bediener eine Kraft auf das Griffelement 16 aus, die zumindest eine Komponente in Arbeitsrichtung 40 aufweist, bewegt sich bedingt durch den reflektierten Anteil des Schlagimpulses das Gehäuse 18 entgegen der Kraft der Druckfeder bzw. des Rückstellelements 30 in Richtung des Griffelements 16, das sich geführt durch die Führungsvorrichtung 12 relativ zum Gehäuse 18 bewegt. Eine über das Rückstellelement 30 auf das Griffelement 16 übertragene Kraft steigt im Vergleich zu einem zeitlichen Verlauf des Schlagimpulses langsam an und wird vom Bediener abgestützt, so dass der Bediener den Schlagimpuls über eine verlängerte Zeitspanne abfangen kann. Dadurch wirkt die Führungsvorrichtung 12 mit dem Rückstellelement 30 als Vibrationsabschirmeinheit 10, die hochfrequente Anteile einer Vibration des Handwerkzeugmaschinenkörpers 14 ausfiltert. Dadurch dient das Rückstellelement 30 gleichzeitig als Stoßabsorptionselement 32, wobei auch Ausgestaltungen der Erfindung denkbar sind, in denen ein vom Rückstellelement 30 getrenntes Stoßabsorptionselement 32 vorliegt.If a shock pulse generated by the impact mechanism is at least partially reflected by a workpiece, the impact pulse can travel via the tool 36 and the tool chuck 34 into the housing 18 of the hand tool body 14, which thereby accelerates counter to the working direction 40. If an operator exerts a force on the grip element 16 that has at least one component in the working direction 40, it moves as a result of the reflected portion of the impact pulse the housing 18 against the force of the compression spring or the return element 30 in the direction of the handle member 16 which moves guided by the guide device 12 relative to the housing 18. A force transmitted to the handle member 16 via the return member 30 slowly increases as compared with a timing of the beat pulse, and is supported by the operator so that the operator can intercept the shock pulse over a prolonged period of time. As a result, the guide device 12 with the restoring element 30 acts as a vibration shielding unit 10, which filters out high-frequency components of a vibration of the hand tool body 14. As a result, the restoring element 30 simultaneously serves as a shock absorbing element 32, embodiments of the invention are also conceivable in which a separate from the restoring element 30 shock absorbing element 32 is present.

In den Figuren 3 und 4 sind weitere Ausführungsbeispiele der Erfindung dargestellt. Analoge Merkmale werden mit den gleichen Bezugszeichen versehen. In der Beschreibung wird im Wesentlichen auf Unterschiede zu dem in den Figuren 1 und 2 dargestellten Ausführungsbeispiel eingegangen. Im Hinblick auf gleichbleibende Merkmale wird auf die Beschreibung zu dem in den Figuren 1 und 2 dargestellten Ausführungsbeispiel verwiesen.In the Figures 3 and 4 Further embodiments of the invention are shown. Analogous features are provided with the same reference numerals. In the description is essentially based on differences from that in the FIGS. 1 and 2 illustrated embodiment received. With regard to consistent features is to the description of the in the FIGS. 1 and 2 referenced embodiment.

Figur 3 zeigt eine alternative Vibrationsabschirmeinheit 10, in der das Rückstellelement 30 als Zugfeder ausgebildet ist, die jeweils an einer einem Griffelement 16 zugewandten Hälfte von Kraftübertragungselementen 20, 22 angreift. Die Zugfeder steht in einer Ausgangsposition des Griffelements 16 unter einer Vorspannung. FIG. 3 shows an alternative vibration shielding unit 10, in which the restoring element 30 is formed as a tension spring which engages in each case on a grip element 16 facing half of force transmission elements 20, 22. The tension spring is in a starting position of the grip element 16 under a bias.

Figur 4 zeigt ein Ausführungsbeispiel der Erfindung, das neben den Merkmalen des in Figur 3 dargestellten Ausführungsbeispiels ein als Gummibauteil ausgebildetes Stoßabsorptionselement 32 aufweist, das gleichzeitig ein Rückstellelement 30 bildet, und zwischen einem als Bolzen ausgebildeten Verbindungselement 24 und einem Gehäuse 18 eines die Vorrichtung umfassenden Bohrhammers angeordnet ist. Das Rückstellelement 30 kann durch eine gestrichelt dargestellte Zugfeder 52 in seiner Wirkung unterstützt sein. FIG. 4 shows an embodiment of the invention, in addition to the features of in FIG. 3 illustrated embodiment designed as a rubber component shock absorption element 32, which simultaneously forms a return element 30, and is arranged between a bolt formed as a connecting element 24 and a housing 18 of a device comprising hammer drill. The return element 30 may be supported by a tension spring 52 shown in dashed lines in its effect.

Es sind Ausgestaltungen der Erfindung denkbar, in denen über eine Längserstreckung des Griffelements 16 mehrere, insbesondere baugleiche Vibrationsabschirmeinheiten 10 angeordnet sind. Ferner sind Ausgestaltungen der Erfindung mit alternativen, dem Fachmann als sinnvoll erscheinenden Stoßabsorptionseinheiten, beispielsweise mit einem inelastisch deformierbaren Material oder mit hydraulischen Stoßdämpfern, denkbar.Embodiments of the invention are conceivable in which a plurality of, in particular identical, vibration shielding units 10 are arranged over a longitudinal extent of the grip element 16. Furthermore, embodiments of the invention are conceivable with alternative impact absorption units which appear to the person skilled in the art to be sensible, for example with an inelastically deformable material or with hydraulic shock absorbers.

Claims (11)

  1. Portable power tool handle device comprising a vibration-shielding unit (10) and a guide device (12) for guiding a movement (26) of a handle element (16) which is mounted such as to be movable relative to a portable power tool machine body (14) and whose movement (26) is at least essentially rectilinear, characterized in that the guide device (12) comprises at least two crossing force-transmission elements (20, 22).
  2. Portable power tool handle device according to Claim 1, characterized in that the handle element (16) is at a distance from a housing (18) of the portable power tool body (14).
  3. Portable power tool handle device according to Claim 1, characterized in that the force-transmission elements (20, 22) are pivotably connected to one another by a connecting element (24).
  4. Portable power tool handle device according to Claim 3, characterized in that the connecting element (24) is arranged in a central region of at least one of the force-transmission elements (20, 22).
  5. Portable power tool handle device according to one of the preceding claims, characterized in that at least one force-transmission element (20, 22) is mounted at at least one end in such a way as to be displaceable in a direction (28) running perpendicularly to the direction of the movement (26).
  6. Portable power tool handle device according to Claims 3 and 5, characterized in that each of the force-transmission elements (20, 22) is displaceably mounted at one end.
  7. Portable power tool handle device according to one of the preceding claims, characterized by at least one elastic return element (30) for returning the handle element (16).
  8. Portable power tool handle device according to one of the preceding claims, characterized by at least one elastically deformable impact-absorbing element (32).
  9. Portable power tool handle device according to Claims 7 and 8, characterized in that the return element (30) and the impact-absorbing element (32) are designed in one piece.
  10. Portable power tool handle device according to Claims 3 and 7, characterized in that the return element (30) acts on at least one force-transmission element (20, 22).
  11. Portable power tool having a portable power tool handle device according to one of the preceding claims.
EP05743127A 2004-08-26 2005-05-03 Manual machine tool handle device comprising a vibration-shielding unit Not-in-force EP1817139B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004041219A DE102004041219A1 (en) 2004-08-26 2004-08-26 Hand machine tool grip device with a vibration shielding unit
PCT/EP2005/052020 WO2006021466A1 (en) 2004-08-26 2005-05-03 Manual machine tool handle device comprising a vibration-shielding unit

Publications (2)

Publication Number Publication Date
EP1817139A1 EP1817139A1 (en) 2007-08-15
EP1817139B1 true EP1817139B1 (en) 2009-03-11

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EP05743127A Not-in-force EP1817139B1 (en) 2004-08-26 2005-05-03 Manual machine tool handle device comprising a vibration-shielding unit

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US (1) US20080000664A1 (en)
EP (1) EP1817139B1 (en)
CN (1) CN101005928B (en)
DE (2) DE102004041219A1 (en)
WO (1) WO2006021466A1 (en)

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Also Published As

Publication number Publication date
DE102004041219A1 (en) 2006-03-02
EP1817139A1 (en) 2007-08-15
DE502005006843D1 (en) 2009-04-23
CN101005928A (en) 2007-07-25
CN101005928B (en) 2013-02-13
WO2006021466A1 (en) 2006-03-02
US20080000664A1 (en) 2008-01-03

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