EP2251151B1 - Handheld power tool, in particular electric hand tool - Google Patents

Handheld power tool, in particular electric hand tool Download PDF

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Publication number
EP2251151B1
EP2251151B1 EP10159979.3A EP10159979A EP2251151B1 EP 2251151 B1 EP2251151 B1 EP 2251151B1 EP 10159979 A EP10159979 A EP 10159979A EP 2251151 B1 EP2251151 B1 EP 2251151B1
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EP
European Patent Office
Prior art keywords
power tool
handheld power
housing
motor housing
securing
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EP10159979.3A
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German (de)
French (fr)
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EP2251151A1 (en
Inventor
Joachim Schadow
Joerg Maute
Manfred Lutz
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP2251151A1 publication Critical patent/EP2251151A1/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
    • 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
    • B25F5/02—Construction of casings, bodies or handles

Definitions

  • the invention relates to a hand tool, in particular an electric hand tool, according to the preamble of claim 1.
  • a designed as angle grinder electric hand tool machine which comprises a two-part housing, consisting of an electric drive motor receiving motor housing and a cup-shaped handle housing, which connects axially to the rear end side of the motor housing. Between the motor housing and the handle housing there is a damping ring, which has the task to attenuate vibrations emanating from the motor housing and vibrations in the handle housing.
  • the rear housing part forms a handle which is connected to the front housing part, wherein between the front housing part and handle a rubber ring is arranged.
  • the connection between the front housing part and handle by means of retaining pins, which are inserted into longitudinal slots, which are introduced into a projection on the front housing part.
  • the handle should be able to move relative to the housing part in the direction of vibration.
  • the DE 10 2005 059 180 A1 shows a hand tool with a handle to be connected to a housing part via screws, which is guided by a decoupling means, wherein the decoupling means is received in a plain bearing bush and the plain bearing bush is inserted into the handle 14a.
  • the invention is based on the object of effectively reducing the vibrations and vibrations propagating into the gripping region of a hand-held power tool with simple structural measures. At the same time a simple way to attach the handle portion to be given to a housing part of the power tool.
  • the hand tool according to the invention is preferably a hand tool machine with an electric drive motor which has a housing with at least two separate housing parts to be connected to one another wherein one of the housing parts forms a grip part for holding and guiding the handheld power tool. Furthermore, a vibration reduction element cooperating with at least one of the housing parts is provided, which has the function of reducing vibrations which are generated during machining of a workpiece or originating from the drive motor in the grip part.
  • the gripping part at least partially surrounds or surrounds the outer side of the second housing part, which is preferably the motor housing accommodating the drive motor, and that a recess extending in the radial direction is made in the motor housing, into which a recess the securing part connected to the securing element protrudes radially.
  • the vibration reduction element is arranged between the lateral surface of the securing element and the wall surface delimiting the recesses.
  • the holder of the grip part on the motor housing thus takes place via a connecting device extending in the radial direction, consisting of the radially extending recess and the projecting securing element.
  • the vibration reduction element is arranged, which sogt for effective vibration reduction of the vibrations emanating from the motor housing vibrations.
  • This embodiment has several advantages. On the one hand, an effective vibration reduction is given in the handle part, since a direct contact between the motor housing and the handle part is avoided due to the intermediate vibration reduction element. On the other hand, a secure connection or mounting of the grip part on the motor housing can be realized in a compact manner. Since the recess extends radially inwardly in the motor housing and the securing element connected to the handle part is guided correspondingly radially inward, no additional installation space for the connection of these housing parts is needed. Overall, a secure connection between the motor housing and handle part can be realized in the smallest possible space.
  • damping elements both damping elements and spring elements can be used. Suitable material for the damping elements are elastomers, PUR or gel-like materials or the like into consideration.
  • spring elements various types of springs can be used, such as coil springs or leaf springs.
  • the spring elements are designed either as separate components, which are connected to at least one of the housing parts, or integrally formed with one of the housing parts, for example in the form of a spring-like extension on the housing of a housing part.
  • the vibration-reducing effect of the spring elements is achieved by a shift of the transmitted vibrations in terms of frequency and amplitude, whereby a vibration change from critical to non-critical frequencies can be achieved.
  • the securing element which is connected to the handle part, may be formed integrally with the wall of the handle part in an advantageous embodiment. In principle, however, is also an embodiment as a separate component, which is connected to the wall of the handle part in some other way.
  • the securing element may be designed as a web, pin or securing dome, which extends in the radial direction on the inside wall of the handle part.
  • the vibration reduction element is ring-shaped or sleeve-shaped and placed on the pin or dome. This is a simplification of the assembly, since the vibration reduction element can be placed on the pin or dome prior to mounting the handle part and can be inserted together with this in the recess in the motor housing.
  • the securing dome may have a passage for receiving a fastening member, which is designed for example as a screw or the like.
  • the screw causes a widening of the dome and thereby exerts a clamping force in the radial direction - with respect to the longitudinal axis of the screw or the longitudinal axis of the dome -, this clamping force due to the radial alignment of the recess and Dom relative to the hand tool parallel to the longitudinal axis of the power tool extends.
  • Due to the expansion of the dome the oscillation reduction element resting against the outside of the dome is pressed against the wall surface of the recess in the motor housing.
  • the recess in the motor housing is designed as a radially extending passage which extends completely through the motor housing.
  • the dome or pin is tapered, so that with increasing radial insertion of the dome or pin in the recess an increasing clamping force is generated transversely to the insertion direction.
  • Distributed over the circumference and / or the axial length can be present several securing elements with associated recesses. It is advantageous to provide on diametrically opposite sides of the motor housing at least one recess-possibly a passage penetrating the motor housing-so that a securing element can be introduced into the recess on diametrically opposite sides. Furthermore, at least one further securing element can be present distributed over the axial length, so that at least two securing elements and associated recesses are present axially. In this way, an optimal support of the handle parts is achieved on the motor housing.
  • the handle part is preferably constructed at least in two parts and comprises two handle half-shells, which are to assemble a cup-shaped handle housing enclosing the motor housing.
  • the handle shells can be independent each inserted with their securing elements radially into the recesses in the motor housing. Basically, the connection between a handle half-shell and the motor housing for holding the handle half-shell is sufficient. Optionally, however, the two mounted on the motor housing grip half shells are still connected to each other.
  • a hand tool for example, an angle grinder, is designed as a power hand tool and has a drive unit to an electric drive motor 3 in a motor housing 2.
  • the housing 5 of the power tool comprises in addition to the motor housing 2, a handle part 4, which is approximately cup-shaped and is mounted on a cylindrical portion of the motor housing 2.
  • the inner radius of the grip part 4 is greater than the outer radius of the motor housing 2, so that an intermediate annulus between the outer surface of the motor housing 2 and the inside of the handle part 4 is formed.
  • the inside of the bottom 4a of the grip part 4 is at an axial distance to the outside of the bottom 2a of the motor housing 2, so that an approximately disc-shaped gap is formed in the region of the bottom.
  • the handle part 4 is connected via vibration reduction elements to the motor housing 2, which ensures that vibrations and vibrations, which arise for example during machining of the workpiece or emanating from the drive motor, from the motor housing 2 in an only reduced manner on the handle part 4.
  • the vibration reduction elements are designed as damping elements 10 and 11, which are arranged between the motor housing 2 and the handle part 4 in order to avoid direct, direct contact between the motor housing and the handle part.
  • a first damping element 10 is hollow-cylindrical or sleeve-shaped and mounted on a Sich ceremoniessdom 8, which forms a securing element and is integrally formed with the wall of the handle part 4.
  • the securing dome 8 extends radially inward on the inside wall of the grip part 4.
  • a passage 13 is introduced, in which a screw 12 is inserted as a fastening member.
  • the securing dome 8 including the damping element 10 is inserted into a recess 6 which is inserted into the motor housing 2 and extends in the motor housing 2 in the radial direction inwardly.
  • the handle part 4 expediently consists of several handle shells, in particular two half shells, which are independently connected to the motor housing and assembled in the assembled state to the cylindrical or cup-shaped handle part.
  • the individual handles are introduced radially with their respective formed securing elements in the associated recesses in the motor housing. Subsequently, optionally, the handles are still connected to each other, which is given both in the axial direction and in the radial direction a secure mounting of the handles on the motor housing.
  • the screw 12 which is inserted into the passage 13 of the backup dome 8, causes a widening transverse to the axis of the fuse dome and thereby presses on the one hand, the outer wall of the fuse dome against the damping element 10 and the other the damping element 10 against the inner wall of the recess 6 in the motor housing 2.
  • the expansion is not mandatory.
  • At least two vibration reduction elements in the form of damping elements are provided axially distributed.
  • a further vibration reduction element in the form of a damping element which is also formed as a hollow cylinder or sleeve-shaped and as a security bolt. 9 executed fuse element is placed.
  • the securing bolt 9 also extends radially inwardly and is formed integrally with the wall of the handle part 4. In the assembled state, the securing bolt 9 protrudes radially into a recess 7, which is introduced into the motor housing 2 adjacent to the bottom 2a.
  • the safety pin 9 is solid, he has no passage.
  • the diameter of the securing bolt 9 including the wall thickness of the damping element 11 may be so dimensioned based on the inner diameter of the recess 7 in the motor housing 2 that the securing bolt including damping element are clamped in the recess.
  • the recesses 6 and 7 in the motor housing 2 and the associated securing element 8 and 9 on the inside of the handle part 4 each have a round cross-section.
  • a trained as a longitudinal slot recess 6 is introduced with rounded end faces in the motor housing 2.
  • the security dome 8 provided with a passage, however, has a round cross-section and is inserted radially into the recess 6.
  • the outer diameter of the securing dome 8 is adapted to the width of the slot-shaped recess 6. The remaining free sections in the longitudinal direction of the slot are filled by the damping element 10.
  • a further damping element 15 is used in the region of the annular space between the outer surface of the motor housing and the inside of the encompassing handle portion, which is for example annular or merely segment-shaped.
  • the damping element 15 is held or secured to a web 14, which is arranged on the radial inner side of the wall of the handle part 4.
  • the damping element 15 is preferably formed in one piece and has a recess into which projects the radially inwardly facing web 14. In this lateral surface of the motor housing 2, a recess or depression is introduced, in which the damping element 15 is received.
  • the web 14 on the inside of the handle part 4 extends in the radial direction only so far that a direct contact between the end face of the web 14 and the bottom of the recess in the lateral surface of the motor housing 2 is avoided.
  • the damping element 10 and the damping element 15 are located axially at the same height, but they are arranged angularly offset from each other.
  • Fig. 3 corresponds in its basic structure to the one after Fig. 2 , As a vibration reduction elements, however, no damping elements, but spring elements are provided.
  • a first spring element 16 is inserted into the recess 6 in the motor housing 2 and extends between the end faces of the cross-sectionally elongated recess 6 and the centrally inserted housing dome 8. Both the recess in the motor housing 2 and the security dome 8 provided with a passage have a rectangular Cross-section on.
  • a second spring element 17 is held on the radially inwardly projecting web 14 on the inside of the wall of the handle part 4 and extends axially between the web 14 and end walls of the recess or recess in the lateral surface of the motor housing 2.
  • Both spring elements 16 and 17th unfold their spring force in the axial direction, relative to the longitudinal axis of the power tool.
  • both spring elements 16, 17 are divided into two and extend axially on both sides of the securing dome 8 and the web 14th
  • a leaf spring 19 is used, which unfolds its spring action in the radial direction and in the axial direction.
  • the leaf spring 19 is coupled via a web 18, which rises above the outer casing of the motor housing 2 and is connected to the wall of the motor housing. The opposite free end of the leaf spring 19 abuts against the inside of the wall of the handle part 4.

Description

Die Erfindung bezieht sich auf eine Handwerkzeugmaschine, insbesondere eine Elektrohandwerkzeugmaschine, nach dem Oberbegriff des Anspruches 1.The invention relates to a hand tool, in particular an electric hand tool, according to the preamble of claim 1.

Stand der TechnikState of the art

In der DE 10 2005 016 453 A1 wird eine als Winkelschleifer ausgebildete Elektrohandwerkzeugmaschine beschrieben, die ein zweiteiliges Gehäuse umfasst, bestehend aus einem einen elektrischen Antriebsmotor aufnehmenden Motorgehäuse und einem topfförmigen Griffgehäuse, das sich axial an die hintere Stirnseite des Motorgehäuses anschließt. Zwischen Motorgehäuse und Griffgehäuse befindet sich ein Dämpfungsring, der die Aufgabe hat, vom Motorgehäuse ausgehende Schwingungen und Vibrationen im Griffgehäuse zu dämpfen.In the DE 10 2005 016 453 A1 a designed as angle grinder electric hand tool machine is described, which comprises a two-part housing, consisting of an electric drive motor receiving motor housing and a cup-shaped handle housing, which connects axially to the rear end side of the motor housing. Between the motor housing and the handle housing there is a damping ring, which has the task to attenuate vibrations emanating from the motor housing and vibrations in the handle housing.

In der DE 195 25 251 A1 wird ein elektrischer Handbohrer beschrieben, dessen hinteres Gehäuseteil einen Handgriff bildet, der mit dem vorderen Gehäuseteil verbunden ist, wobei zwischen vorderem Gehäuseteil und Handgriff ein Kautschukring angeordnet ist. Gemäß einer Ausführungsvariante erfolgt die Verbindung zwischen vorderem Gehäuseteil und Handgriff mittels Haltestiften, die in Längsschlitze eingesetzt sind, welche in einen Vorsprung am vorderen Gehäuseteil eingebracht sind. Durch diese Verbindung soll sich der Handgriff gegenüber dem Gehäuseteil in Vibrationsrichtung verschieben können.In the DE 195 25 251 A1 an electric hand drill is described, the rear housing part forms a handle which is connected to the front housing part, wherein between the front housing part and handle a rubber ring is arranged. According to one embodiment, the connection between the front housing part and handle by means of retaining pins, which are inserted into longitudinal slots, which are introduced into a projection on the front housing part. Through this connection, the handle should be able to move relative to the housing part in the direction of vibration.

Die DE 10 2005 059 180 A1 zeigt eine Handwerkzeugmaschine mit einem Handgriff, der mit einem Gehäuseteil über Schrauben zu verbinden ist, welche durch ein Entkopplungsmittel geführt ist, wobei das Entkopplungsmittel in einer Gleitlagerbuchse aufgenommen und die Gleitlagerbuchse in den Handgriff 14a eingebracht ist.The DE 10 2005 059 180 A1 shows a hand tool with a handle to be connected to a housing part via screws, which is guided by a decoupling means, wherein the decoupling means is received in a plain bearing bush and the plain bearing bush is inserted into the handle 14a.

Offenbarung der ErfindungDisclosure of the invention

Der Erfindung liegt die Aufgabe zu Grunde, mit einfachen konstruktiven Maßnahmen die sich in den Griffbereich einer Handwerkzeugmaschine ausbreitenden Vibrationen und Schwingungen wirksam zu reduzieren. Zugleich soll eine einfache Möglichkeit zur Befestigung des Griffbereichs an einem Gehäuseteil der Handwerkzeugmaschine gegeben sein.The invention is based on the object of effectively reducing the vibrations and vibrations propagating into the gripping region of a hand-held power tool with simple structural measures. At the same time a simple way to attach the handle portion to be given to a housing part of the power tool.

Diese Aufgabe wird erfindungsgemäß mit den Merkmalen des Anspruches 1 gelöst. Die Unteransprüche geben zweckmäßige Weiterbildungen an.This object is achieved with the features of claim 1. The dependent claims indicate expedient developments.

Bei der erfindungsgemäßen Handwerkzeugmaschine handelt es sich bevorzugt um eine Handwerkzeugmaschine mit elektrischem Antriebsmotor, die ein Gehäuse mit mindestens zwei separaten und miteinander zu verbindenden Gehäuseteilen aufweist, wobei eines der Gehäuseteile ein Griffteil zum Halten und Führen der Handwerkzeugmaschine bildet. Des Weiteren ist ein mit mindestens einem der Gehäuseteile zusammenwirkendes Schwingungsreduktionselement vorgesehen, welches die Funktion hat, Schwingungen, die bei der Bearbeitung eines Werkstückes erzeugt werden oder vom Antriebsmotor ausgehen, in dem Griffteil zu reduzieren.The hand tool according to the invention is preferably a hand tool machine with an electric drive motor which has a housing with at least two separate housing parts to be connected to one another wherein one of the housing parts forms a grip part for holding and guiding the handheld power tool. Furthermore, a vibration reduction element cooperating with at least one of the housing parts is provided, which has the function of reducing vibrations which are generated during machining of a workpiece or originating from the drive motor in the grip part.

Erfindungsgemäß ist vorgesehen, dass das Griffteil die Außenseite des zweiten Gehäuseteils, bei dem es sich bevorzugt um das den Antriebsmotor aufnehmende Motorgehäuse handelt, zumindest teilweise umgreift bzw. umschließt und dass in das Motorgehäuse eine sich in Radialrichtung erstreckende Ausnehmung eingebracht ist, in die ein mit dem Griffteil verbundenes Sicherungselement radial einragt. Das Schwingungsreduktionselement ist zwischen der Mantelfläche des Sicherungselements und der die Ausnehmungen begrenzenden Wandfläche angeordnet.According to the invention, the gripping part at least partially surrounds or surrounds the outer side of the second housing part, which is preferably the motor housing accommodating the drive motor, and that a recess extending in the radial direction is made in the motor housing, into which a recess the securing part connected to the securing element protrudes radially. The vibration reduction element is arranged between the lateral surface of the securing element and the wall surface delimiting the recesses.

Die Halterung des Griffteils an dem Motorgehäuse erfolgt somit über eine sich in Radialrichtung erstreckende Verbindungseinrichtung, bestehend aus der sich in Radialrichtung erstreckenden Ausnehmung und dem einragenden Sicherungselement. Um einen unmittelbaren Kontakt zwischen den Gehäuseteilen zu vermeiden, ist zwischen dem Sicherungselement und der Ausnehmung das Schwingungsreduktionselement angeordnet, welches für eine wirksame Schwingungsreduzierung der vom Motorgehäuse ausgehenden Schwingungen und Vibrationen sogt.The holder of the grip part on the motor housing thus takes place via a connecting device extending in the radial direction, consisting of the radially extending recess and the projecting securing element. In order to avoid direct contact between the housing parts, between the securing element and the recess, the vibration reduction element is arranged, which sogt for effective vibration reduction of the vibrations emanating from the motor housing vibrations.

Diese Ausführung weist verschiedene Vorteile auf. Zum einen ist eine wirksame Schwingungsreduzierung im Griffteil gegeben, da ein direkter Kontakt zwischen Motorgehäuse und Griffteil aufgrund des zwischenliegenden Schwingungsreduktionselements vermieden wird. Zum andern kann auf kompakte Weise eine sichere Verbindung bzw. Halterung des Griffteils an dem Motorgehäuse realisiert werden. Da sich die Ausnehmung radial nach innen im Motorgehäuse erstreckt und das mit dem Griffteil verbundene Sicherungselement entsprechend radial nach innen geführt ist, wird kein zusätzlicher Einbauraum für die Verbindung dieser Gehäuseteile benötigt. Insgesamt lässt sich auf kleinstmöglichem Raum eine sichere Verbindung zwischen Motorgehäuse und Griffteil realisieren.This embodiment has several advantages. On the one hand, an effective vibration reduction is given in the handle part, since a direct contact between the motor housing and the handle part is avoided due to the intermediate vibration reduction element. On the other hand, a secure connection or mounting of the grip part on the motor housing can be realized in a compact manner. Since the recess extends radially inwardly in the motor housing and the securing element connected to the handle part is guided correspondingly radially inward, no additional installation space for the connection of these housing parts is needed. Overall, a secure connection between the motor housing and handle part can be realized in the smallest possible space.

Vorteilhaft ist außerdem, dass sowohl in Radialrichtung als auch in Axialrichtung eine sichere und belastbare Verbindung zwischen Griffteil und Motorgehäuse gegeben ist. Über das radial einragende Sicherungselement ist eine formschlüssige Verbindung in Achsrichtung gegeben, so dass ein versehentliches Lösen des Griffteils vom Motorgehäuse ausgeschlossen ist. Auch in Radialrichtung ist auf Grund des zwischenliegenden Schwingungsreduktionselementes eine Kraft übertragende Verbindung gegeben, so dass auch ein versehentliches radiales Lösen des Griffteils vom Motorgehäuse ausgeschlossen ist.It is also advantageous that both in the radial direction and in the axial direction, a safe and reliable connection between the handle and the motor housing is given. About the radially projecting securing element is a positive connection in the axial direction, so that accidental release of the handle part is excluded from the motor housing. Also in the radial direction is given due to the intermediate vibration reduction element, a force transmitting connection, so that an accidental radial release of the handle part is excluded from the motor housing.

Als Schwingungsreduktionselemente können sowohl Dämpfungselemente als auch Federelemente eingesetzt werden. Als Material für die Dämpfungselemente kommen Elastomere, PUR oder gelartige Werkstoffe oder dergleichen in Betracht. Als Federelemente können verschiedenartige Federtypen eingesetzt werden, beispielsweise Schraubenfedern oder Blattfedern. Die Federelemente sind entweder als separate Bauteile ausgeführt, die mit mindestens einem der Gehäuseteile verbunden sind, oder einteilig mit einem der Gehäuseteile ausgebildet, beispielsweise in Form eines federartigen Fortsatzes am Gehäuse eines Gehäuseteils. Die schwingungsreduzierende Wirkung der Federelemente wird durch eine Verlagerung der übertragenen Schwingungen im Hinblick auf Frequenz und Amplitude erreicht, wodurch eine Schwingungsänderung von kritischen zu unkritischen Frequenzen erzielt werden kann.As vibration reduction elements both damping elements and spring elements can be used. Suitable material for the damping elements are elastomers, PUR or gel-like materials or the like into consideration. As spring elements various types of springs can be used, such as coil springs or leaf springs. The spring elements are designed either as separate components, which are connected to at least one of the housing parts, or integrally formed with one of the housing parts, for example in the form of a spring-like extension on the housing of a housing part. The vibration-reducing effect of the spring elements is achieved by a shift of the transmitted vibrations in terms of frequency and amplitude, whereby a vibration change from critical to non-critical frequencies can be achieved.

Das Sicherungselement, welches mit dem Griffteil verbunden ist, kann in einer vorteilhaften Ausführung einteilig mit der Wandung des Griffteils ausgebildet sein. Grundsätzlich möglich ist aber auch eine Ausführung als separates Bauteil, das mit der Wandung des Griffteiles auf sonstige Weise verbunden ist.The securing element, which is connected to the handle part, may be formed integrally with the wall of the handle part in an advantageous embodiment. In principle, however, is also an embodiment as a separate component, which is connected to the wall of the handle part in some other way.

Das Sicherungselement kann als Steg, Zapfen oder Sicherungsdom ausgeführt sein, das sich in Radialrichtung an der Wandinnenseite des Griffteiles erstreckt. Insbesondere in der Ausführung als Zapfen oder Dom ist das Schwingungsreduktionselement ring- oder hülsenförmig ausgebildet und auf den Zapfen bzw. Dom aufgesetzt. Dies stellt eine Montageerleichterung dar, da das Schwingungsreduktionselement bereits vor dem Montieren des Griffteils auf den Zapfen bzw. Dom aufgesetzt und gemeinsam mit diesem in die Ausnehmung im Motorgehäuse eingeführt werden kann.The securing element may be designed as a web, pin or securing dome, which extends in the radial direction on the inside wall of the handle part. In particular, in the embodiment as a pin or dome, the vibration reduction element is ring-shaped or sleeve-shaped and placed on the pin or dome. This is a simplification of the assembly, since the vibration reduction element can be placed on the pin or dome prior to mounting the handle part and can be inserted together with this in the recess in the motor housing.

Der Sicherungsdom kann einen Durchgang zur Aufnahme eines Befestigungsgliedes aufweisen, das beispielsweise als eine Schraube oder dergleichen ausgeführt ist. Die Schraube bewirkt ein Aufweiten des Domes und übt dadurch eine Klemmkraft in Radialrichtung - bezogen auf die Schraubenlängsachse bzw. die Längsachse des Doms - aus, wobei diese Klemmkraft auf Grund der radialen Ausrichtung von Ausnehmung und Dom sich bezogen auf die Handwerkzeugmaschine parallel zur Längsache der Handwerkzeugmaschine erstreckt. Durch das Aufweiten des Doms wird das an der Domaußenseite anliegende Schwingungsreduktionselement gegen die Wandfläche der Ausnehmung im Motorgehäuse gepresst.The securing dome may have a passage for receiving a fastening member, which is designed for example as a screw or the like. The screw causes a widening of the dome and thereby exerts a clamping force in the radial direction - with respect to the longitudinal axis of the screw or the longitudinal axis of the dome -, this clamping force due to the radial alignment of the recess and Dom relative to the hand tool parallel to the longitudinal axis of the power tool extends. Due to the expansion of the dome, the oscillation reduction element resting against the outside of the dome is pressed against the wall surface of the recess in the motor housing.

Darüber hinaus ist es aber auch möglich, die in den Dom eingeführte Schraube auf der gegenüberliegenden Seite des Motorgehäuses mit einem Gegenstück, beispielsweise einer Mutter zu verbinden. In dieser Ausführung ist die Ausnehmung im Motorgehäuse als radial sich erstreckender Durchgang ausgeführt, der sich vollständig durch das Motorgehäuse hindurch erstreckt.In addition, however, it is also possible to connect the introduced into the dome screw on the opposite side of the motor housing with a counterpart, such as a mother. In this embodiment, the recess in the motor housing is designed as a radially extending passage which extends completely through the motor housing.

Des Weiteren ist es auch möglich, die Klemmwirkung dadurch zu erzielen, dass der Dom bzw. Zapfen konisch zulaufend ausgebildet ist, so dass mit zunehmendem radialen Einführen des Doms bzw. Zapfens in die Ausnehmung eine zunehmende Klemmkraft quer zur Einführrichtung erzeugt wird.Furthermore, it is also possible to achieve the clamping effect in that the dome or pin is tapered, so that with increasing radial insertion of the dome or pin in the recess an increasing clamping force is generated transversely to the insertion direction.

Über den Umfang und/oder die axiale Länge verteilt können mehrere Sicherungselemente mit zugeordneten Ausnehmungen vorhanden sein. Vorteilhaft ist es, an diametral gegenüberliegenden Seiten des Motorgehäuses jeweils mindestens eine Ausnehmung - ggf. einen das Motorgehäuse durchdringenden Durchgang - vorzusehen, so dass an diametral gegenüberliegenden Seiten jeweils ein Sicherungselement in die Ausnehmung einführbar ist. Des Weiteren kann über die axiale Länge verteilt mindestens ein weiteres Sicherungselement vorhanden sein, so dass axial mindestens zwei Sicherungselement und zugeordnete Ausnehmungen vorhanden sind. Auf diese Weise wird eine optimale Abstützung der Griffteile am Motorgehäuse erreicht.Distributed over the circumference and / or the axial length can be present several securing elements with associated recesses. It is advantageous to provide on diametrically opposite sides of the motor housing at least one recess-possibly a passage penetrating the motor housing-so that a securing element can be introduced into the recess on diametrically opposite sides. Furthermore, at least one further securing element can be present distributed over the axial length, so that at least two securing elements and associated recesses are present axially. In this way, an optimal support of the handle parts is achieved on the motor housing.

Das Griffteil ist bevorzugt mindestens zweiteilig aufgebaut und umfasst zwei Griffhalbschalen, die zu einem das Motorgehäuse umschließenden, topfförmigen Griffgehäuse zusammenzusetzen sind. Die Griffhalbschalen können unabhängig voneinander jeweils mit ihren Sicherungselementen radial in die Ausnehmungen im Motorgehäuse eingeführt werden. Grundsätzlich ist die Verbindung zwischen einer Griffhalbschale und dem Motorgehäuse für die Halterung der Griffhalbschale ausreichend. Gegebenenfalls werden aber die beiden am Motorgehäuse montierten Griffhalbschalen auch noch miteinander verbunden.The handle part is preferably constructed at least in two parts and comprises two handle half-shells, which are to assemble a cup-shaped handle housing enclosing the motor housing. The handle shells can be independent each inserted with their securing elements radially into the recesses in the motor housing. Basically, the connection between a handle half-shell and the motor housing for holding the handle half-shell is sufficient. Optionally, however, the two mounted on the motor housing grip half shells are still connected to each other.

Weitere Vorteile und zweckmäßige Ausführungen sind den weiteren Ansprüchen, der Figurenbeschreibung und den Zeichnungen zu entnehmen. Es zeigen:

Fig. 1
eine Handwerkzeugmaschine mit einem Motorgehäuse zur Aufnahme eines elektrischen Antriebsmotors und einem Griffteil, das das Motorgehäuse umschließt, wobei zur Verbindung von Griffteil und Motorgehäuse an der Innenwand des Griffteils ein Sicherungsdom ausgebildet ist, der in eine radial sich erstreckende Ausnehmung im Motorgehäuses eingeführt ist, dargestellt in zwei Ansichten,
Fig. 2
eine Handwerkzeugmaschine in einer weiteren Ausführung, in der zur zusätzlichen Sicherung zwischen Motorgehäuse und Griffteil an der Wandinnenseite des Griffteils ein Steg ausgebildet ist, der in eine flache Ausnehmung an der Mantelfläche des Motorgehäuses einragt und der zur Halterung und Sicherung eines Dämpferelementes dient,
Fig. 3
ein weiteres Ausführungsbeispiel, das ähnlich aufgebaut ist wie das Ausführungsbeispiel nach Fig. 2, wobei als Schwingungsreduktionselement ein Federelement vorgesehen ist,
Fig. 4
ein weiteres Ausführungsbeispiel mit einem blattfederartigen Schwingungsreduktionselement im Zwischenraum zwischen der Mantelfläche des Innenraums und der Innenwand des umgreifenden Griffteils.
Further advantages and expedient embodiments can be taken from the further claims, the description of the figures and the drawings. Show it:
Fig. 1
a hand tool with a motor housing for receiving an electric drive motor and a handle part, which encloses the motor housing, wherein for connecting the handle part and the motor housing on the inner wall of the handle part a Sicherungsdom is formed, which is inserted into a radially extending recess in the motor housing, shown in FIG two views,
Fig. 2
a hand tool in a further embodiment, in the additional securing between the motor housing and handle on the inside wall of the handle portion, a web is formed, which protrudes into a shallow recess on the lateral surface of the motor housing and which serves to hold and secure a damper element,
Fig. 3
a further embodiment, which is constructed similar to the embodiment according to Fig. 2 , wherein a spring element is provided as the vibration reduction element,
Fig. 4
a further embodiment with a leaf spring-like vibration reduction element in the space between the lateral surface of the interior and the inner wall of the encompassing handle part.

In den Figuren sind gleiche Bauteile mit gleichen Bezugszeichen versehen.In the figures, the same components are provided with the same reference numerals.

Die in Fig. 1 dargestellte Handwerkzeugmaschine, beispielsweise ein Winkelschleifer, ist als Elektrohandwerkzeugmaschine ausgeführt und weist als Antriebseinheit einen elektrischen Antriebsmotor 3 in einem Motorgehäuse 2 auf. Das Gehäuse 5 der Handwerkzeugmaschine umfasst neben dem Motorgehäuse 2 auch ein Griffteil 4, welches etwa topfförmig ausgebildet ist und auf einen zylindrischen Abschnitt des Motorgehäuses 2 aufgesetzt ist. Der Innenradius des Griffteils 4 ist größer als der Außenradius des Motorgehäuses 2, so dass ein zwischenliegender Ringraum zwischen der äußeren Mantelfläche des Motorgehäuses 2 und der Innenseite des Griffteils 4 gebildet ist. Auch die Innenseite des Bodens 4a des Griffteils 4 liegt auf axialem Abstand zur Außenseite des Bodens 2a des Motorgehäuses 2, so dass auch im Bereich des Bodens ein etwa scheibenförmiger Zwischenraum gebildet ist. Das Griffteil 4 ist über Schwingungsreduktionselemente mit dem Motorgehäuse 2 verbunden, wodurch sichergestellt ist, dass Vibrationen und Schwingungen, die beispielsweise bei der Bearbeitung des Werkstückes entstehen oder vom Antriebsmotor ausgehen, sich vom Motorgehäuse 2 in einer nur reduzierten Weise auf das Griffteil 4 auswirken.In the Fig. 1 shown hand tool, for example, an angle grinder, is designed as a power hand tool and has a drive unit to an electric drive motor 3 in a motor housing 2. The housing 5 of the power tool comprises in addition to the motor housing 2, a handle part 4, which is approximately cup-shaped and is mounted on a cylindrical portion of the motor housing 2. The inner radius of the grip part 4 is greater than the outer radius of the motor housing 2, so that an intermediate annulus between the outer surface of the motor housing 2 and the inside of the handle part 4 is formed. Also, the inside of the bottom 4a of the grip part 4 is at an axial distance to the outside of the bottom 2a of the motor housing 2, so that an approximately disc-shaped gap is formed in the region of the bottom. The handle part 4 is connected via vibration reduction elements to the motor housing 2, which ensures that vibrations and vibrations, which arise for example during machining of the workpiece or emanating from the drive motor, from the motor housing 2 in an only reduced manner on the handle part 4.

Die Schwingungsreduktionselemente sind als Dämpfungselemente 10 und 11 ausgeführt, die zwischen dem Motorgehäuse 2 und dem Griffteil 4 angeordnet sind, um einen unmittelbaren, direkten Kontakt zwischen Motorgehäuse und Griffteil zu vermeiden. Ein erstes Dämpfungselement 10 ist hohlzylindrisch bzw. hülsenförmig ausgebildet und auf einen Sicherungsdom 8 aufgesetzt, der ein Sicherungselement bildet und einteilig mit der Wandung des Griffteiles 4 ausgebildet ist. Der Sicherungsdom 8 erstreckt sich an der Wandinnenseite des Griffteiles 4 radial nach innen. In den Sicherungsdom 8 ist ein Durchgang 13 eingebracht, in den eine Schraube 12 als Befestigungsglied eingeführt ist.The vibration reduction elements are designed as damping elements 10 and 11, which are arranged between the motor housing 2 and the handle part 4 in order to avoid direct, direct contact between the motor housing and the handle part. A first damping element 10 is hollow-cylindrical or sleeve-shaped and mounted on a Sicherungsdom 8, which forms a securing element and is integrally formed with the wall of the handle part 4. The securing dome 8 extends radially inward on the inside wall of the grip part 4. In the Sicherungsdom 8, a passage 13 is introduced, in which a screw 12 is inserted as a fastening member.

Der Sicherungsdom 8 einschließlich dem Dämpfungselement 10 ist in eine Ausnehmung 6 eingeführt, die in das Motorgehäuse 2 eingebracht ist und sich im Motorgehäuse 2 in Radialrichtung nach innen erstreckt. Um die Montage des Griffteiles 4 durchführen zu können, besteht das Griffteil 4 zweckmäßigerweise aus mehreren Griffschalen, insbesondere zwei Halbschalen, die unabhängig voneinander mit dem Motorgehäuse verbunden werden und im montierten Zustand zu dem zylindrischen bzw. topfförmigen Griffteil zusammengefügt sind. Bei der Montage werden die einzelnen Griffschalen mit ihren jeweils ausgebildeten Sicherungselementen in die zugeordneten Ausnehmungen im Motorgehäuse radial eingeführt. Anschließend können optional die Griffschalen noch miteinander verbunden werden, wodurch sowohl in Achsrichtung als auch in Radialrichtung eine sichere Halterung der Griffschalen am Motorgehäuse gegeben ist.The securing dome 8 including the damping element 10 is inserted into a recess 6 which is inserted into the motor housing 2 and extends in the motor housing 2 in the radial direction inwardly. In order to carry out the assembly of the handle part 4, the handle part 4 expediently consists of several handle shells, in particular two half shells, which are independently connected to the motor housing and assembled in the assembled state to the cylindrical or cup-shaped handle part. During assembly, the individual handles are introduced radially with their respective formed securing elements in the associated recesses in the motor housing. Subsequently, optionally, the handles are still connected to each other, which is given both in the axial direction and in the radial direction a secure mounting of the handles on the motor housing.

Die Schraube 12, die in den Durchgang 13 des Sicherungsdoms 8 eingesetzt ist, bewirkt eine Aufweitung quer zur Achse des Sicherungsdoms und drückt dadurch zum einen die Außenwandung des Sicherungsdoms gegen das Dämpfungselement 10 und zum andern das Dämpfungselement 10 gegen die Innenwand der Ausnehmung 6 im Motorgehäuse 2. Die Aufweitung ist aber nicht zwingend erforderlich.The screw 12, which is inserted into the passage 13 of the backup dome 8, causes a widening transverse to the axis of the fuse dome and thereby presses on the one hand, the outer wall of the fuse dome against the damping element 10 and the other the damping element 10 against the inner wall of the recess 6 in the motor housing 2. The expansion is not mandatory.

Im Ausführungsbeispiel sind axial verteilt zumindest zwei Schwingungsreduktionselemente in Form von Dämpfungselementen vorgesehen. Zusätzlich zu dem vorbeschriebenen Dämpfungselement 10, welches auf den mit einem Durchgang versehenen Sicherungsdom 8 aufgesetzt ist, befindet sich benachbart zum Boden 2a des Motorgehäuses 2 ein weiteres Schwingungsreduktionselement in Form eines Dämpfungselementes, das ebenfalls hohlzylindrisch bzw. hülsenförmig ausgebildet ist und auf einen als Sicherungsbolzen 9 ausgeführtes Sicherungselement aufgesetzt ist. Der Sicherungsbolzen 9 erstreckt sich ebenfalls radial nach innen und ist einteilig mit der Wandung des Griffteiles 4 ausgebildet. Im montierten Zustand ragt der Sicherungsbolzen 9 radial in eine Ausnehmung 7 ein, die in das Motorgehäuse 2 benachbart zum Boden 2a eingebracht ist. Der Sicherungsbolzen 9 ist massiv ausgeführt, er besitzt keinen Durchgang. Der Durchmesser des Sicherungsbolzen 9 einschließlich der Wandstärke des Dämpfungselementes 11 kann bezogen auf den Innendurchmesser der Ausnehmung 7 im Motorgehäuse 2 so bemessen sein, dass der Sicherungsbolzen einschließlich Dämpfungselement in der Ausnehmung festgeklemmt sind.In the exemplary embodiment, at least two vibration reduction elements in the form of damping elements are provided axially distributed. In addition to the above-described damping element 10, which is placed on the security dome 8 provided with a passage, adjacent to the bottom 2a of the motor housing 2 is a further vibration reduction element in the form of a damping element, which is also formed as a hollow cylinder or sleeve-shaped and as a security bolt. 9 executed fuse element is placed. The securing bolt 9 also extends radially inwardly and is formed integrally with the wall of the handle part 4. In the assembled state, the securing bolt 9 protrudes radially into a recess 7, which is introduced into the motor housing 2 adjacent to the bottom 2a. The safety pin 9 is solid, he has no passage. The diameter of the securing bolt 9 including the wall thickness of the damping element 11 may be so dimensioned based on the inner diameter of the recess 7 in the motor housing 2 that the securing bolt including damping element are clamped in the recess.

Die Ausnehmungen 6 und 7 im Motorgehäuse 2 sowie die zugeordneten Sicherungselement 8 bzw. 9 an der Innenseite des Griffteils 4 besitzen jeweils einen runden Querschnitt.The recesses 6 and 7 in the motor housing 2 and the associated securing element 8 and 9 on the inside of the handle part 4 each have a round cross-section.

Im Ausführungsbeispiel gemäß Fig. 2 ist eine als Längsschlitz ausgebildete Ausnehmung 6 mit abgerundeten Stirnseiten in das Motorgehäuse 2 eingebracht. Der mit einem Durchgang versehene Sicherungsdom 8 besitzt dagegen einen runden Querschnitt und ist in die Ausnehmung 6 radial eingeführt. Der Außendurchmesser des Sicherungsdoms 8 ist an die Breite der schlitzförmigen Ausnehmung 6 angepasst. Die verbleibenden freien Abschnitte in Längsrichtung des Schlitzes sind von dem Dämpfungselement 10 ausgefüllt.In the embodiment according to Fig. 2 a trained as a longitudinal slot recess 6 is introduced with rounded end faces in the motor housing 2. The security dome 8 provided with a passage, however, has a round cross-section and is inserted radially into the recess 6. The outer diameter of the securing dome 8 is adapted to the width of the slot-shaped recess 6. The remaining free sections in the longitudinal direction of the slot are filled by the damping element 10.

Als zusätzliche Verbindung zwischen dem Motorgehäuse 2 und dem Griffteil 4 ist im Bereich des ringförmigen Zwischenraumes zwischen äußerer Mantelfläche des Motorgehäuses und Innenseite des umgreifenden Griffteils ein weiteres Dämpfungselement 15 eingesetzt, welches beispielsweise ringförmig oder lediglich segmentförmig ausgebildet ist. Das Dämpfungselement 15 ist an einem Steg 14 gehalten bzw. gesichert, der an der radialen Innenseite der Wandung des Griffteiles 4 angeordnet ist. Das Dämpfungselement 15 ist vorzugsweise einteilig ausgebildet und weist eine Ausnehmung auf, in die der radial nach innen weisende Steg 14 einragt. In dies Mantelfläche des Motorgehäuses 2 ist eine Ausnehmung bzw. Vertiefung eingebracht, in der das Dämpfungselement 15 aufgenommen ist. Der Steg 14 an der Innenseite des Griffteiles 4 erstreckt sich in Radialrichtung nur so weit, dass ein unmittelbarer Kontakt zwischen der Stirnseite des Stegs 14 und dem Boden der Vertiefung in der Mantelfläche des Motorgehäuses 2 vermieden wird.As an additional connection between the motor housing 2 and the handle portion 4, a further damping element 15 is used in the region of the annular space between the outer surface of the motor housing and the inside of the encompassing handle portion, which is for example annular or merely segment-shaped. The damping element 15 is held or secured to a web 14, which is arranged on the radial inner side of the wall of the handle part 4. The damping element 15 is preferably formed in one piece and has a recess into which projects the radially inwardly facing web 14. In this lateral surface of the motor housing 2, a recess or depression is introduced, in which the damping element 15 is received. The web 14 on the inside of the handle part 4 extends in the radial direction only so far that a direct contact between the end face of the web 14 and the bottom of the recess in the lateral surface of the motor housing 2 is avoided.

Das Dämpfungselement 10 und das Dämpfungselement 15 befinden sich axial in gleicher Höhe, sie sind jedoch winkelversetzt zueinander angeordnet.The damping element 10 and the damping element 15 are located axially at the same height, but they are arranged angularly offset from each other.

Das Ausführungsbeispiel nach Fig. 3 entspricht in seinem grundsätzlichen Aufbau demjenigen nach Fig. 2. Als Schwingungsreduktionselemente sind jedoch keine Dämpfungselemente, sondern Federelemente vorgesehen. Ein erstes Federelement 16 ist in die Ausnehmung 6 im Motorgehäuse 2 eingesetzt und erstreckt sich zwischen den Stirnseiten der im Querschnitt länglichen Ausnehmung 6 und dem mittig eingeführten Gehäusedom 8. Sowohl die Ausnehmung im Motorgehäuse 2 als auch der mit einem Durchgang versehene Sicherungsdom 8 weisen einen rechteckförmigen Querschnitt auf.The embodiment according to Fig. 3 corresponds in its basic structure to the one after Fig. 2 , As a vibration reduction elements, however, no damping elements, but spring elements are provided. A first spring element 16 is inserted into the recess 6 in the motor housing 2 and extends between the end faces of the cross-sectionally elongated recess 6 and the centrally inserted housing dome 8. Both the recess in the motor housing 2 and the security dome 8 provided with a passage have a rectangular Cross-section on.

Ein zweites Federelement 17 ist an dem radial nach innen ragenden Steg 14 an der Innenseite der Wandung des Griffteiles 4 gehalten und erstreckt sich axial zwischen dem Steg 14 und stirnseitigen Wandungen der Ausnehmung bzw. Vertiefung in der Mantelfläche des Motorgehäuses 2. Beide Federelemente 16 und 17 entfalten ihre Federkraft in Achsrichtung, bezogen auf die Längsachse der Handwerkzeugmaschine. Außerdem sind beide Federelemente 16, 17 zweigeteilt und erstrecken sich axial zu beiden Seiten des Sicherungsdomes 8 bzw. des Steges 14.A second spring element 17 is held on the radially inwardly projecting web 14 on the inside of the wall of the handle part 4 and extends axially between the web 14 and end walls of the recess or recess in the lateral surface of the motor housing 2. Both spring elements 16 and 17th unfold their spring force in the axial direction, relative to the longitudinal axis of the power tool. In addition, both spring elements 16, 17 are divided into two and extend axially on both sides of the securing dome 8 and the web 14th

Im Ausführungsbeispiel gemäß Fig. 4 ist in den Zwischenraum zwischen äußerer Mantelfläche des Motorgehäuses 2 und Innenseite des umgreifenden Griffteiles 4 eine Blattfeder 19 eingesetzt, die ihre Federwirkung in Radialrichtung und in Achsrichtung entfaltet. Die Blattfeder 19 ist über einen Steg 18, welcher sich über den Außenmantel des Motorgehäuses 2 erhebt und mit der Wandung des Motorgehäuses verbunden ist, gekoppelt. Die gegenüberliegende freie Stirnseite der Blattfeder 19 liegt an der Innenseite der Wandung des Griffteiles 4 an.In the embodiment according to Fig. 4 is in the space between the outer surface of the motor housing 2 and the inside of the encompassing handle part 4, a leaf spring 19 is used, which unfolds its spring action in the radial direction and in the axial direction. The leaf spring 19 is coupled via a web 18, which rises above the outer casing of the motor housing 2 and is connected to the wall of the motor housing. The opposite free end of the leaf spring 19 abuts against the inside of the wall of the handle part 4.

Claims (9)

  1. Handheld power tool, in particular an electric handheld power tool, comprising a housing, which has at least two separate housing parts (2, 4) to be connected to one another, wherein one housing part is designed as a handle part (4) for holding and guiding the handheld power tool (1) and there is arranged a vibration reduction element (10, 11, 15, 16, 17), which interacts with at least one housing part (2, 4), wherein the handle part (4) at least partially encloses the outside of the further housing part (2), and wherein the further housing part (2) incorporates a clearance (6, 7), which extends in the radial direction and into which a securing element (8, 9) connected to the handle part (4) radially protrudes, wherein the vibration reduction element (10, 11, 15, 16, 17) is arranged between the lateral surface of the securing element (8, 9) and the wall surface bounding the clearance (6, 7), characterized in that the securing element (8, 9) is a securing pin (8, 9) formed as one part with the wall of the handle part (4) and extending in the radial direction, wherein the vibration reduction element (10, 11) is formed in the manner of a ring or sleeve and is mounted on the securing pin (8, 9).
  2. Handheld power tool according to Claim 1, characterized in that in the securing pin (8) there is a passage (13) for receiving a fastening element, for example for receiving a screw (12).
  3. Handheld power tool according to Claim 1 or 2, characterized in that there are distributed over the axial length at least two securing elements (8, 9), which protrude radially into clearances (6, 7) in the further housing part (2).
  4. Handheld power tool according to one of Claims 1 to 3, characterized in that the handle part (4) is constructed as at least two parts and in the mounted state encloses the further housing part (2) in the form of a pot.
  5. Handheld power tool according to one of Claims 1 to 4, characterized in that the clearance (6, 7) in the further housing part (2) is formed as a passage.
  6. Handheld power tool according to one of Claims 1 to 5, characterized in that the housing part interacting with the handle part (4) is a motor housing (2) for receiving a drive unit (3).
  7. Handheld power tool according to one of Claims 1 to 6, characterized in that the vibration reduction element (10, 11, 15) is a damping element.
  8. Handheld power tool according to one of Claims 1 to 7, characterized in that the vibration reduction element (16, 17) is a spring element.
  9. Handheld power tool housing in a handheld power tool according to one of Claims 1 to 8.
EP10159979.3A 2009-05-11 2010-04-15 Handheld power tool, in particular electric hand tool Active EP2251151B1 (en)

Applications Claiming Priority (1)

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DE200910002976 DE102009002976A1 (en) 2009-05-11 2009-05-11 Hand tool machine, in particular electric hand tool machine

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EP2251151B1 true EP2251151B1 (en) 2019-01-09

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DE102011122938B3 (en) * 2011-12-19 2016-01-28 Festo Ag & Co. Kg setting tool
DE102012212066A1 (en) * 2012-07-11 2014-01-16 Robert Bosch Gmbh Portable machine tool
CN108422010A (en) * 2018-06-25 2018-08-21 张家港市勇峰精密机械有限公司 A kind of damping and silencing electric drill
CN108465846A (en) * 2018-06-25 2018-08-31 张家港市勇峰精密机械有限公司 A kind of multifunction drill
CN115723013A (en) 2021-09-01 2023-03-03 株式会社牧田 Grinding tool

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DE4211316A1 (en) * 1992-04-04 1993-10-07 Atlas Copco Elektrowerkzeuge Electrical machine tool housing - has vibration body in clearance between overlapping edges of two sections of housing connecting sections together
JPH0825249A (en) * 1994-07-12 1996-01-30 Makita Corp Vibrating tool and vibration isolating ring
DE19730356C2 (en) * 1997-07-15 2001-05-17 Wacker Werke Kg Vibration-damped breaker and / or hammer drill
JPH10266867A (en) * 1997-03-19 1998-10-06 Kioritz Corp Portable power working machine
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ES2719202T3 (en) 2019-07-09
DE102009002976A1 (en) 2010-11-18
DE202010018324U1 (en) 2015-08-14
EP2251151A1 (en) 2010-11-17

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