EP2097224B1 - Hand-held power tool - Google Patents

Hand-held power tool Download PDF

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Publication number
EP2097224B1
EP2097224B1 EP07821379.0A EP07821379A EP2097224B1 EP 2097224 B1 EP2097224 B1 EP 2097224B1 EP 07821379 A EP07821379 A EP 07821379A EP 2097224 B1 EP2097224 B1 EP 2097224B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
torque
coupling element
switching
power tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP07821379.0A
Other languages
German (de)
French (fr)
Other versions
EP2097224A1 (en
Inventor
Andre Ullrich
Helmut Heinzelmann
Juergen Lennartz
Michael Weiss
Tobias Herr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2097224A1 publication Critical patent/EP2097224A1/en
Application granted granted Critical
Publication of EP2097224B1 publication Critical patent/EP2097224B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/006—Mode changers; Mechanisms connected thereto
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/061—Swash-plate actuated impulse-driving mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0015—Tools having a percussion-only mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0023—Tools having a percussion-and-rotation mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0038—Tools having a rotation-only mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0003—Details of shafts of percussive tool bits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/231—Sleeve details

Definitions

  • the invention is based on a hand tool according to the preamble of claim 1 and as from JP 9 239 675 A known.
  • the switching device is provided for switching between different modes and has a torque sleeve.
  • Out JP 9 239675 A is a rotary hammer with a beating and a rotating drive and a switching device for switching between different modes, wherein the switching device comprises a torque sleeve, and known with a bearing shaft which is rigidly connected in one mode with a housing of the hammer drill and rotatably mounted on the torque sleeve is.
  • the invention relates to a hand tool with the features of claim 1.
  • the power tool has a bearing axis on which the torque sleeve is rotatably mounted, whereby a particularly compact switching device with an efficient transmission of a drive torque, in particular a torque, can be achieved.
  • the torque sleeve is arranged immovably in an axial direction of the bearing axis on this.
  • a "switching between different operating modes" is intended, in particular, to switch between a beating or a beating-rotating drive, between a beating-rotating drive and a rotating drive, between a beating and a rotating drive, or between a beating, a rotating drive or a hitting-rotating drive for a tool located in the hand tool machine.
  • the torque sleeve is expediently provided to transmit torque to further units, such as a striking mechanism arrangement and / or a main driven means, such as a hammer tube, during operation of the hand tool.
  • the torque sleeve during operation of the power tool is rotationally connected to a drive unit, such as via a drive shaft.
  • a "bearing axis" is to be understood to mean an axle which is fixed and immovable, in particular non-rotatably connected to a housing of the handheld power tool and which is provided for mounting further components of the handheld power tool.
  • the hand tool machine is formed by a hammer drill, which has a pure bit drive, a pure drill drive and a combined drill chisel drive for driven by the power tool tool.
  • the bearing axis is rigidly connected to a portable power tool housing, whereby a mass to be rotated in a torque transmission to a mass of the torque sleeve can be reduced, so that a torque transmission with low energy losses can be achieved.
  • the bearing axis can be directly or particularly advantageous indirectly connected to the power tool housing, such as by means of a Swissflanschs.
  • the switching device has a gear unit which is rotatably mounted on the bearing axis, whereby structurally simple drive torque in the form of a torque can be transmitted by means of the gear unit.
  • the gear unit is interposed between the torque sleeve and another unit and so provided for transmitting the torque from the torque sleeve to the further unit, such as a hammer tube for generating a rotary drive for a tool and / or on a percussion device, a Impact momentum generated for a tool.
  • the gear unit has at least one coupling element which is provided for transmitting a torque for a rotary drive of a tool.
  • the coupling element is integrally formed as a toothing to the gear unit.
  • the switching device has a switching sleeve which is provided for a torque transmission from the torque sleeve to the gear unit.
  • a particularly compact switching device can be achieved by the switching sleeve, which is preferably shorter than the torque sleeve, transmits a torque within a particularly short transmission range.
  • the shift sleeve is also provided for shifting into different types of drive of the hand tool for a tool, such as a chisel drive, a drill drive, etc.
  • the gear unit has at least one further coupling element which is provided for transmitting torque from the shift sleeve to the gear unit, whereby a particularly low-wear torque transmission can be achieved.
  • the coupling element is formed by a toothing corresponding to the switching sleeve or to a coupling element of the switching sleeve.
  • a permanent transmission of a drive torque, in particular a torque, during operation of the power tool can advantageously be achieved if the shifting device has at least one coupling element which rotatably connects the sliding sleeve to the torque sleeve.
  • the sliding sleeve is thus always on the torque sleeve during operation of the power tool rotating to a drive unit, such as an electric motor connected.
  • the shift sleeve along an axial direction on the torque sleeve is slidably disposed, so that the switching sleeve during operation of the power tool or the switching device by moving in the axial direction on the torque sleeve can be easily brought into different switching positions and operating positions.
  • the shift sleeve has at least one coupling element which transmits torque in at least one operating position to a striking mechanism arrangement, whereby a positive and particularly low-wear transmission to the striking mechanism arrangement can be achieved.
  • the coupling element of the shift sleeve for transmitting torque to the percussion device is formed integrally with a coupling element of the shift sleeve, which rotatably connects this during operation of the power tool with the torque sleeve, so that more components, space, assembly costs and costs can be advantageously saved.
  • the shift sleeve is provided in at least one mode to a simultaneous transmission of torque to the gear unit and the percussion mechanism and so structurally simple, a compact switching device can be achieved.
  • the shift sleeve preferably has a length along an axial direction, which allows simultaneous engagement of components of the striking mechanism arrangement and the gear unit coupling to the sliding sleeve in at least one operating position.
  • FIGS. 1 to 3 is a detail of an inventive, formed by a rotary hammer hand tool 10 with a switching device 12 is shown.
  • the hand tool 10 comprises a non-illustrated, formed by an electric motor drive unit, which is in operation the power tool 10 generates a drive torque and this transmits via a drive shaft 38 to a torque sleeve 14.
  • the drive torque is transmitted during operation of the power tool 10 of the torque sleeve 14 on a percussion device 34 and on a hammer tube 40 formed Hauptabtriebsstoff and thereby generates a rotating, a beating or a hitting-rotating drive of a located in a tool holder tool 24.
  • Bei a transmission of the drive torque to the hammer tube 40 rotates this about a tool axis 42 and thus generates a rotating drive in the FIGS. 1 to 3 not shown tool holder, in which the tool 24 is arranged against rotation.
  • this When transmitting a drive torque on the impact mechanism 34, this generates a shock pulse which is transmitted via a rack, not shown on an anvil and finally on the tool 24 ( FIGS. 1 to 3 ).
  • the switching device 12 comprises the torque sleeve 14, a bearing shaft 16, a gear unit 20 and a shift sleeve 26, which is provided for switching between different types of drive of the power tool 10.
  • the bearing shaft 16 has a drive-side end 44 and a driven-side end 46 and is connected to these rigid and immovable with an intermediate flange 18 of a hand tool housing.
  • the torque sleeve 14 is rotatably and immovably mounted in an axial direction 32 via a bearing not shown in detail.
  • the axial direction 32 extends parallel to the tool axis 42.
  • the torque sleeve 14 extends in the axial direction 32 of the bearing axis 16 of the drive-side end 44th to a center of the bearing axis 16.
  • a gear 50 through which the drive torque from the drive shaft 38 which has a gear 50 corresponding toothing and engages positively in the gear 50 , is transmitted to the torque sleeve 14, so that during operation of the power tool 10 is always a drive torque of the drive unit is transmitted to the torque sleeve 14 ( FIGS. 1 to 3 ).
  • the shift sleeve 26 is arranged against rotation about the torque sleeve 14.
  • the switching device 12 a coupling element 30 which is formed by a driving toothing and the shift sleeve 26 rotatably connected to the torque sleeve 14.
  • the coupling element 30 is rotatably connected to the torque sleeve 14 in an axial direction 32 of the torque sleeve 14 on the output side end 52.
  • this On a radially outwardly directed side of the coupling element 30, this has a toothing, into which a coupling element 30 corresponding, formed by a coupling element 36 internal toothing of the shift sleeve 26 engages positively, wherein the internal toothing on a radially inwardly facing cylinder surface ( FIGS. 1 to 2 ) of the switching sleeve 26 is arranged.
  • the coupling element 36 of the shift sleeve 26 extends in the axial direction 32 over an entire length 54 of the shift sleeve 26, so that the shift sleeve 26 by an operator of the power tool 10 for switching to different types of drive for the located in the tool holder tool 24 in different switching positions along the Axial direction 32 of the torque sleeve 14 can be moved ( FIGS. 1 to 3 ).
  • the shift sleeve 26 is always independent of the different switching positions along the torque sleeve 14 against rotation connected thereto.
  • the switching sleeve 26 receives during operation of the power tool 10 along the torque sleeve 14 in the axial direction 32 different switching positions ( FIGS. 1 to 3 ).
  • a first switching position in which the switching device 12 and the switching sleeve 26 switches in a pure drill drive for the tool 24, the shift sleeve 26 is brought via an unspecified and operable for an operator actuator in a front, output side position ( FIG. 1 ).
  • the shift sleeve 26 transmits a drive torque to the gear unit 20, which is rotatably and immovably mounted in the axial direction 32 via a not-shown bearing on the bearing axis 16.
  • the gear unit 20 is connected to the torque sleeve 14 or to the coupling element 30 of the torque sleeve 14 rotatably relative to the torque sleeve 14 along the axial direction 32 of the bearing axis 16.
  • this has a coupling element 28 which is formed by a toothed wheel 20 integrally formed on the gear unit and has a toothing, which is arranged on a radially outwardly directed surface of the coupling element 28.
  • the toothing of the coupling element 28 is adapted to the coupling element 36 of the switching sleeve 26, so that a positive engagement of the coupling element 36 of the switching sleeve 26 and the toothing of the coupling element 28 of the gear unit 20 within the first switching position or in a drilling operation of the power tool 10 is achieved ( FIG. 1 ).
  • the gear unit 20 also has a further coupling element 22 which is arranged on a driven-side end 64 of the gear unit 20.
  • the coupling element 22 is formed by a gear formed integrally with the gear unit 20, which has a toothing on a radially outwardly directed surface 66 of the coupling element 22.
  • the coupling element 22 engages in a drilling operation of the power tool 10 in a coupling element 22 corresponding, formed by a gear coupling element 68 which is arranged against rotation on the hammer tube 40.
  • a drive torque is transmitted from the shift sleeve 26 or the coupling element 36 of the shift sleeve 26 to the coupling element 28 of the gear unit 20 and from the gear unit 20 and the further coupling element 22 of the gear unit 20 to the coupling element 68th of the hammer tube 40 transmitted. If the shift sleeve 26 is located in the output end position, the coupling element 36 of the shift sleeve 26 covers only the coupling element 30 of the torque sleeve 14 and the coupling element 28 of the gear unit 20, so that the tool 24 is driven in an exclusive drill drive ( FIG. 1 ).
  • the shift sleeve 26 simultaneously transmits a drive torque to the coupling element 28 of the gear unit 20 and to the percussion mechanism assembly 34 or to a coupling element 70 of the impact mechanism arrangement 34 (FIG. FIG. 2 ).
  • the switching sleeve 26 is pushed into a middle shift position along the axial direction 32 of the torque sleeve 14, in which the coupling element 36 of the shift sleeve 26 with the output end 56 still in engagement with the coupling element 28 of the gear unit 20 and with a drive end 72 in engagement with the coupling element 70 of Impact mechanism 34 is.
  • the hand tool 10 thus simultaneously performs a drilling and chisel movement for a tool 24.
  • the percussion mechanism 34 comprises a wobble finger 74, which is mounted on a wobble sleeve 78 via a ball bearing 76.
  • the wobble sleeve 78 is freely rotatably mounted on the torque sleeve 14 via a bearing 80 which is formed by a needle bearing.
  • the wobble sleeve 78 is immovably mounted on the torque sleeve 14 in the axial direction 32.
  • On a driven-side end 82 of the wobble sleeve 78 this has the coupling element 70, which is formed by a toothing corresponding to the internal toothing of the coupling element 36 of the switching sleeve 26 and rotationally fixed to the wobble sleeve 78 is arranged. Via the coupling element 36 of the shift sleeve 26, the torque is transmitted to the coupling element 70 and thus to the wobble sleeve 78 and thus driven the percussion mechanism 34.
  • a third shift position of the shift sleeve 26 this exclusively transmits a drive torque to the impact mechanism arrangement 34 (FIG. FIG. 3 ).
  • the switching sleeve 26 is in a drive-side end position on the torque sleeve 14 and on the torque sleeve 14 together with the coupling element 30, wherein the coupling element 36 of the switching sleeve 26 in the axial direction 32 completely covers the coupling element 70 of the wobble sleeve 78.
  • the coupling element 36 of the shift sleeve 26 and the coupling element 28 of the gear unit 20 are in a decoupled position to each other, so that the tool 24 is in an exclusive chisel operation.
  • a befindliches on the output side end 56 of the shift sleeve 26 locking 58 is moved together with the shift sleeve 26.
  • the locking means 58 is arranged in a semicircle around the gear unit 20.
  • the locking means 58 has a not shown in detail, radially inwardly facing internal toothing, which is in the pure chisel operation of the power tool in engagement with the coupling element 28 of the gear unit 20 and the gear unit 20 locked against rotation, ie, the gear unit 20 is located opposite the shift sleeve 26 in a resting position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)
  • Structure Of Transmissions (AREA)
  • Arrangement And Mounting Of Devices That Control Transmission Of Motive Force (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Handwerkzeugmaschine nach dem Oberbegriff des Anspruchs 1 und wie aus JP 9 239 675 A bekannt.The invention is based on a hand tool according to the preamble of claim 1 and as from JP 9 239 675 A known.

Es ist bereits eine Handwerkzeugmaschine mit einem schlagenden und einem drehenden Antrieb und einer Schaltvorrichtung bekannt. Die Schaltvorrichtung ist zu einem Schalten zwischen unterschiedlichen Betriebsarten vorgesehen und weist eine Drehmomenthülse auf.It is already known a hand tool with a beating and a rotating drive and a switching device. The switching device is provided for switching between different modes and has a torque sleeve.

Aus JP 9 239675 A ist ein Bohrhammer mit einem schlagenden und einem drehend Antrieb und einer Schaltvorrichtung zum Schalten zwischen unterschiedlichen Betriebsarten, wobei die Schaltvorrichtung eine Drehmomenthülse aufweist, und mit einer Lagerachse bekannt, die in einer Betriebsart starr mit einem Gehäuse des Bohrhammers verbunden und auf der die Drehmomenthülse drehbar gelagert ist.Out JP 9 239675 A is a rotary hammer with a beating and a rotating drive and a switching device for switching between different modes, wherein the switching device comprises a torque sleeve, and known with a bearing shaft which is rigidly connected in one mode with a housing of the hammer drill and rotatably mounted on the torque sleeve is.

Vorteile der ErfindungAdvantages of the invention

Die Erfindung betrifft eine Handwerkzeugmaschine mit den Merkmalen des Anspruchs 1. Vorteilhafte Weiterbildungen ergeben sich aus den abhängigen Ansprüchen.The invention relates to a hand tool with the features of claim 1. Advantageous developments emerge from the dependent claims.

Es wird vorgeschlagen, dass die Handwerkzeugmaschine eine Lagerachse aufweist, auf der die Drehmomenthülse drehbar gelagert ist, wodurch eine besonders kompakte Schaltvorrichtung mit einer effizienten Übertragung eines Antriebsmoments, insbesondere eines Drehmoments, erreicht werden kann. Vorzugsweise ist die Drehmomenthülse in einer Axialrichtung der Lagerachse unbewegbar auf dieser angeordnet. Unter einem "Schalten zwischen unterschiedlichen Betriebsarten" soll in diesem Zusammenhang insbesondere ein Schalten insbesondere zwischen einem schlagenden oder einem schlagend-drehenden Antrieb, zwischen einem schlagend-drehenden und einem drehenden Antrieb, zwischen einem schlagenden und einem drehenden Antrieb oder zwischen einem schlagenden, einem drehenden oder einem schlagend-drehenden Antrieb für ein in der Handwerkzeugmaschine befindliches Werkzeug verstanden werden. Die Drehmomenthülse ist zweckmäßigerweise dazu vorgesehen, in einem Betrieb der Handwerkzeugmaschine ein Drehmoment auf weitere Einheiten, wie beispielsweise auf eine Schlagwerksanordnung und/oder auf ein Hauptabtriebsmittel, wie beispielsweise ein Hammerrohr, zu übertragen. Vorzugsweise ist die Drehmomenthülse im Betrieb der Handwerkzeugmaschine drehend mit einer Antriebseinheit verbunden, wie beispielsweise über eine Antriebswelle. In diesem Zusammenhang soll unter einer "Lagerachse" eine Achse verstanden werden, die fest und unbewegbar, insbesondere undrehbar mit einem Gehäuse der Handwerkzeugmaschine verbunden ist und die zu einer Lagerung von weiteren Bauteilen der Handwerkzeugmaschine vorgesehen ist. Insbesondere ist die Handwerkzeugmaschine von einem Bohrhammer gebildet, der über einen reinen Meißelantrieb, einen reinen Bohrantrieb und einen kombinierten Bohr-Meißelantrieb für ein von der Handwerkzeugmaschine angetriebenes Werkzeug verfügt.It is proposed that the power tool has a bearing axis on which the torque sleeve is rotatably mounted, whereby a particularly compact switching device with an efficient transmission of a drive torque, in particular a torque, can be achieved. Preferably, the torque sleeve is arranged immovably in an axial direction of the bearing axis on this. In this context, a "switching between different operating modes" is intended, in particular, to switch between a beating or a beating-rotating drive, between a beating-rotating drive and a rotating drive, between a beating and a rotating drive, or between a beating, a rotating drive or a hitting-rotating drive for a tool located in the hand tool machine. The torque sleeve is expediently provided to transmit torque to further units, such as a striking mechanism arrangement and / or a main driven means, such as a hammer tube, during operation of the hand tool. Preferably, the torque sleeve during operation of the power tool is rotationally connected to a drive unit, such as via a drive shaft. In this context, a "bearing axis" is to be understood to mean an axle which is fixed and immovable, in particular non-rotatably connected to a housing of the handheld power tool and which is provided for mounting further components of the handheld power tool. In particular, the hand tool machine is formed by a hammer drill, which has a pure bit drive, a pure drill drive and a combined drill chisel drive for driven by the power tool tool.

Des Weiteren wird vorgeschlagen, dass die Lagerachse starr mit einem Handwerkzeugmaschinengehäuse verbunden ist, wodurch eine in eine Rotation zu versetzende Masse bei einer Drehmomentübertragung auf eine Masse der Drehmomenthülse reduziert werden kann, so dass eine Drehmomentübertragung mit geringen Energieverlusten erreicht werden kann. Die Lagerachse kann dabei direkt oder besonders vorteilhaft indirekt mit dem Handwerkzeugmaschinengehäuse verbunden sein, wie beispielsweise mittels eines Zwischenflanschs.Furthermore, it is proposed that the bearing axis is rigidly connected to a portable power tool housing, whereby a mass to be rotated in a torque transmission to a mass of the torque sleeve can be reduced, so that a torque transmission with low energy losses can be achieved. The bearing axis can be directly or particularly advantageous indirectly connected to the power tool housing, such as by means of a Zwischenflanschs.

Weiterhin wird vorgeschlagen, dass die Schaltvorrichtung eine Zahnradeinheit aufweist, die auf der Lagerachse drehbar gelagert ist, wodurch konstruktiv einfach ein Antriebsmoment in Form eines Drehmoments mittels der Zahnradeinheit übertragen werden kann. Vorzugsweise ist die Zahnradeinheit zwischen der Drehmomenthülse und einer weiteren Einheit zwischengeschaltet und so zu einer Übertragung des Drehmoments von der Drehmomenthülse auf die weitere Einheit vorgesehen, wie beispielsweise auf ein Hammerrohr zur Erzeugung eines drehenden Antriebs für ein Werkzeug und/oder auf eine Schlagwerksanordnung, die einen Schlagimpuls für ein Werkzeug generiert.Furthermore, it is proposed that the switching device has a gear unit which is rotatably mounted on the bearing axis, whereby structurally simple drive torque in the form of a torque can be transmitted by means of the gear unit. Preferably, the gear unit is interposed between the torque sleeve and another unit and so provided for transmitting the torque from the torque sleeve to the further unit, such as a hammer tube for generating a rotary drive for a tool and / or on a percussion device, a Impact momentum generated for a tool.

Eine besonders robuste und formschlüssige Übertragung eines Drehmoments kann vorteilhaft erreicht werden, wenn die Zahnradeinheit zumindest ein Kopplungselement aufweist, das zu einer Übertragung eines Drehmoments für einen drehenden Antrieb eines Werkzeugs vorgesehen ist. Vorzugsweise ist das Kopplungselement als Verzahnung einstückig an die Zahnradeinheit angeformt.A particularly robust and positive transmission of torque can be advantageously achieved if the gear unit has at least one coupling element which is provided for transmitting a torque for a rotary drive of a tool. Preferably, the coupling element is integrally formed as a toothing to the gear unit.

Erfindungsgemäß wird vorgeschlagen, dass die Schaltvorrichtung eine Schalthülse aufweist, die zu einer Drehmomentübertragung von der Drehmomenthülse auf die Zahnradeinheit vorgesehen ist. Hiermit kann eine besonders kompakte Schaltvorrichtung erzielt werden, indem die Schalthülse, die vorzugsweise kürzer als die Drehmomenthülse ist, innerhalb eines besonders kurzen Übertragungsbereichs ein Drehmoment überträgt. Vorzugsweise ist die Schalthülse neben der Übertragung eines Drehmoments auf die Zahnradeinheit zudem zu einem Schalten in unterschiedliche Antriebsarten der Handwerkzeugmaschine für ein Werkzeug, wie beispielsweise einen Meißelantrieb, einen Bohrantrieb usw., vorgesehen.According to the invention it is proposed that the switching device has a switching sleeve which is provided for a torque transmission from the torque sleeve to the gear unit. Hereby, a particularly compact switching device can be achieved by the switching sleeve, which is preferably shorter than the torque sleeve, transmits a torque within a particularly short transmission range. Preferably, in addition to the transmission of torque to the gear unit, the shift sleeve is also provided for shifting into different types of drive of the hand tool for a tool, such as a chisel drive, a drill drive, etc.

Vorteilhaft wird vorgeschlagen, dass die Zahnradeinheit zumindest ein weiteres Kopplungselement aufweist, das zu einer Übertragung eines Drehmoments von der Schalthülse auf die Zahnradeinheit vorgesehen ist, wodurch eine besonders verschleißarme Drehmomentübertragung erreicht werden kann. Vorzugsweise ist das Kopplungselement von einer mit der Schalthülse bzw. mit einem Kopplungselement der Schalthülse korrespondierenden Verzahnung gebildet.It is advantageously proposed that the gear unit has at least one further coupling element which is provided for transmitting torque from the shift sleeve to the gear unit, whereby a particularly low-wear torque transmission can be achieved. Preferably, the coupling element is formed by a toothing corresponding to the switching sleeve or to a coupling element of the switching sleeve.

Eine im Betrieb der Handwerkzeugmaschine permanente Übertragung eines Antriebsmoments, insbesondere eines Drehmoments, kann vorteilhaft erreicht werden, wenn die Schaltvorrichtung zumindest ein Kopplungselement aufweist, das die Schiebehülse drehfest mit der Drehmomenthülse verbindet. Die Schiebehülse ist somit über die Drehmomenthülse im Betrieb der Handwerkzeugmaschine immer drehend mit einer Antriebseinheit, wie beispielsweise einem Elektromotor, verbunden.A permanent transmission of a drive torque, in particular a torque, during operation of the power tool can advantageously be achieved if the shifting device has at least one coupling element which rotatably connects the sliding sleeve to the torque sleeve. The sliding sleeve is thus always on the torque sleeve during operation of the power tool rotating to a drive unit, such as an electric motor connected.

Vorteilhaft wird vorgeschlagen, dass die Schalthülse entlang einer Axialrichtung auf der Drehmomenthülse verschiebbar angeordnet ist, so dass die Schalthülse im Betrieb der Handwerkzeugmaschine bzw. der Schaltvorrichtung durch ein Verschieben in Axialrichtung auf der Drehmomenthülse konstruktiv einfach in unterschiedliche Schaltpositionen bzw. Betriebspositionen gebracht werden kann.It is advantageously proposed that the shift sleeve along an axial direction on the torque sleeve is slidably disposed, so that the switching sleeve during operation of the power tool or the switching device by moving in the axial direction on the torque sleeve can be easily brought into different switching positions and operating positions.

Erfindungsgemäß wird vorgeschlagen, dass die Schalthülse zumindest ein Kopplungselement aufweist, das in zumindest einer Betriebsposition ein Drehmoment auf eine Schlagwerksanordnung überträgt, wodurch eine formschlüssige und besonders verschleißarme Übertragung auf die Schlagwerksanordnung erreicht werden kann. Vorzugsweise ist das Kopplungselement der Schalthülse zur Übertragung eines Drehmoments auf die Schlagwerksanordnung einstückig mit einem Kopplungselement der Schalthülse ausgebildet, das diese im Betrieb der Handwerkzeugmaschine drehend mit der Drehmomenthülse verbindet, so dass weitere Bauteile, Bauraum, Montageaufwand und Kosten vorteilhaft eingespart werden können.According to the invention it is proposed that the shift sleeve has at least one coupling element which transmits torque in at least one operating position to a striking mechanism arrangement, whereby a positive and particularly low-wear transmission to the striking mechanism arrangement can be achieved. Preferably, the coupling element of the shift sleeve for transmitting torque to the percussion device is formed integrally with a coupling element of the shift sleeve, which rotatably connects this during operation of the power tool with the torque sleeve, so that more components, space, assembly costs and costs can be advantageously saved.

Vorteilhaft wird vorgeschlagen, dass die Schalthülse in zumindest einer Betriebsart zu einer gleichzeitigen Übertragung eines Drehmoments auf die Zahnradeinheit und auf die Schlagwerksanordnung vorgesehen ist und so konstruktiv einfach eine kompakte Schaltvorrichtung erreicht werden kann. Die Schalthülse weist vorzugsweise eine Länge entlang einer Axialrichtung auf, die ein gleichzeitiges Eingreifen von an die Schiebehülse koppelnden Bauteilen der Schlagwerksanordnung und der Zahnradeinheit in zumindest einer Betriebsposition ermöglicht.It is advantageously proposed that the shift sleeve is provided in at least one mode to a simultaneous transmission of torque to the gear unit and the percussion mechanism and so structurally simple, a compact switching device can be achieved. The shift sleeve preferably has a length along an axial direction, which allows simultaneous engagement of components of the striking mechanism arrangement and the gear unit coupling to the sliding sleeve in at least one operating position.

Zeichnungdrawing

Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung ist ein Ausführungsbeispiel 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 drawing, an embodiment of the invention is 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 Ausschnitt einer erfindungsgemäßen Handwerkzeugmaschine mit einer Schaltvorrichtung in einem Bohrbetrieb in einer schematischen Seitendarstellung,
Fig. 2
die Handwerkzeugmaschine aus Figur 1 in einem Schlagbohrbetrieb in einer schematischen Seitendarstellung und
Fig. 3
die Handwerkzeugmaschine aus Figur 1 in einem Meißelbetrieb in einer schematischen Seitendarstellung.
Show it:
Fig. 1
a detail of a hand tool according to the invention with a switching device in a drilling operation in a schematic side view,
Fig. 2
the hand tool FIG. 1 in a Schlagbohrbetrieb in a schematic page presentation and
Fig. 3
the hand tool FIG. 1 in a chisel operation in a schematic page presentation.

Beschreibung des AusführungsbeispielsDescription of the embodiment

In den Figuren 1 bis 3 ist ein Ausschnitt einer erfindungsgemäßen, von einem Bohrhammer gebildeten Handwerkzeugmaschine 10 mit einer Schaltvorrichtung 12 dargestellt. Die Handwerkzeugmaschine 10 umfasst eine nicht näher dargestellte, von einem Elektromotor gebildete Antriebseinheit, die im Betrieb der Handwerkzeugmaschine 10 ein Antriebsmoment erzeugt und dieses über eine Antriebswelle 38 auf eine Drehmomenthülse 14 überträgt. Das Antriebsmoment wird im Betrieb der Handwerkzeugmaschine 10 von der Drehmomenthülse 14 auf eine Schlagwerksanordnung 34 bzw. auf ein von einem Hammerrohr 40 gebildetes Hauptabtriebsmittel übertragen und erzeugt dabei einen drehenden, einen schlagenden oder einen schlagend-drehenden Antrieb eines in einer Werkzeugaufnahme befindlichen Werkzeugs 24. Bei einer Übertragung des Antriebsmoments auf das Hammerrohr 40 rotiert dieses um eine Werkzeugachse 42 und erzeugt damit einen drehenden Antrieb der in den Figuren 1 bis 3 nicht näher dargestellten Werkzeugaufnahme, in welcher das Werkzeug 24 verdrehsicher angeordnet ist. Bei der Übertragung eines Antriebsmoments auf die Schlagwerksanordnung 34 generiert diese einen Schlagimpuls, der über einen nicht näher dargestellten Schläger auf einen Döpper und schließlich auf das Werkzeug 24 übertragen wird (Figuren 1 bis 3).In the FIGS. 1 to 3 is a detail of an inventive, formed by a rotary hammer hand tool 10 with a switching device 12 is shown. The hand tool 10 comprises a non-illustrated, formed by an electric motor drive unit, which is in operation the power tool 10 generates a drive torque and this transmits via a drive shaft 38 to a torque sleeve 14. The drive torque is transmitted during operation of the power tool 10 of the torque sleeve 14 on a percussion device 34 and on a hammer tube 40 formed Hauptabtriebsmittel and thereby generates a rotating, a beating or a hitting-rotating drive of a located in a tool holder tool 24. Bei a transmission of the drive torque to the hammer tube 40 rotates this about a tool axis 42 and thus generates a rotating drive in the FIGS. 1 to 3 not shown tool holder, in which the tool 24 is arranged against rotation. When transmitting a drive torque on the impact mechanism 34, this generates a shock pulse which is transmitted via a rack, not shown on an anvil and finally on the tool 24 ( FIGS. 1 to 3 ).

Die Schaltvorrichtung 12 umfasst die Drehmomenthülse 14, eine Lagerachse 16, eine Zahnradeinheit 20 und eine Schalthülse 26, die zu einem Schalten zwischen unterschiedlichen Antriebsarten der Handwerkzeugmaschine 10 vorgesehen ist. Die Lagerachse 16 weist ein antriebsseitiges Ende 44 und ein abtriebsseitiges Ende 46 auf und ist mit diesen starr und unbeweglich mit einem Zwischenflansch 18 eines Handwerkzeugmaschinengehäuses verbunden. Auf der Lagerachse 16 ist die Drehmomenthülse 14 drehbar und in eine Axialrichtung 32 unbewegbar über ein nicht näher dargestelltes Lager gelagert. Die Axialrichtung 32 erstreckt sich dabei parallel zur Werkzeugachse 42. Die Drehmomenthülse 14 erstreckt sich in Axialrichtung 32 der Lagerachse 16 von dem antriebsseitigen Ende 44 bis etwa zu einer Mitte der Lagerachse 16. An einem antriebsseitigen Ende 48 der Drehmomenthülse 14 ist an diese einstückig ein Zahnrad 50 angeformt, über das das Antriebsmoment von der Antriebswelle 38, die eine zum Zahnrad 50 korrespondierende Verzahnung aufweist und formschlüssig in das Zahnrad 50 greift, auf die Drehmomenthülse 14 übertragen wird, so dass im Betrieb der Handwerkzeugmaschine 10 stets ein Antriebsmoment der Antriebseinheit auf die Drehmomenthülse 14 übertragen wird (Figuren 1 bis 3).The switching device 12 comprises the torque sleeve 14, a bearing shaft 16, a gear unit 20 and a shift sleeve 26, which is provided for switching between different types of drive of the power tool 10. The bearing shaft 16 has a drive-side end 44 and a driven-side end 46 and is connected to these rigid and immovable with an intermediate flange 18 of a hand tool housing. On the bearing axis 16, the torque sleeve 14 is rotatably and immovably mounted in an axial direction 32 via a bearing not shown in detail. The axial direction 32 extends parallel to the tool axis 42. The torque sleeve 14 extends in the axial direction 32 of the bearing axis 16 of the drive-side end 44th to a center of the bearing axis 16. At a drive-side end 48 of the torque sleeve 14 integrally formed thereon, a gear 50 through which the drive torque from the drive shaft 38 which has a gear 50 corresponding toothing and engages positively in the gear 50 , is transmitted to the torque sleeve 14, so that during operation of the power tool 10 is always a drive torque of the drive unit is transmitted to the torque sleeve 14 ( FIGS. 1 to 3 ).

Zum Schalten zwischen den unterschiedlichen Antriebsarten ist die Schalthülse 26 verdrehsicher um die Drehmomenthülse 14 angeordnet. Hierzu weist die Schaltvorrichtung 12 ein Kopplungselement 30 auf, das von einer Mitnahmeverzahnung gebildet ist und die Schalthülse 26 drehfest mit der Drehmomenthülse 14 verbindet. Das Kopplungselement 30 ist in einem in Axialrichtung 32 der Drehmomenthülse 14 abtriebsseitigen Ende 52 drehfest mit der Drehmomenthülse 14 verbunden. An einer radial nach außen gerichteten Seite des Kopplungselements 30 weist dieses eine Verzahnung auf, in die eine zum Kopplungselement 30 korrespondierende, von einem Kopplungselement 36 gebildete Innenverzahnung der Schalthülse 26 formschlüssig greift, wobei die Innenverzahnung an einer radial nach innen weisenden Zylindermantelfläche (Figuren 1 bis 2) der Schalthülse 26 angeordnet ist. Das Kopplungselement 36 der Schalthülse 26 erstreckt sich dabei in Axialrichtung 32 über eine gesamte Länge 54 der Schalthülse 26, so dass die Schalthülse 26 von einem Bediener der Handwerkzeugmaschine 10 zum Schalten in unterschiedliche Antriebsarten für das in der Werkzeugaufnahme befindliche Werkzeug 24 in unterschiedliche Schaltpositionen entlang der Axialrichtung 32 der Drehmomenthülse 14 verschoben werden kann (Figuren 1 bis 3). Die Schalthülse 26 ist dabei unabhängig von den unterschiedlichen Schaltpositionen entlang der Drehmomenthülse 14 stets verdrehsicher mit dieser verbunden.For switching between the different types of drive, the shift sleeve 26 is arranged against rotation about the torque sleeve 14. For this purpose, the switching device 12, a coupling element 30 which is formed by a driving toothing and the shift sleeve 26 rotatably connected to the torque sleeve 14. The coupling element 30 is rotatably connected to the torque sleeve 14 in an axial direction 32 of the torque sleeve 14 on the output side end 52. On a radially outwardly directed side of the coupling element 30, this has a toothing, into which a coupling element 30 corresponding, formed by a coupling element 36 internal toothing of the shift sleeve 26 engages positively, wherein the internal toothing on a radially inwardly facing cylinder surface ( FIGS. 1 to 2 ) of the switching sleeve 26 is arranged. The coupling element 36 of the shift sleeve 26 extends in the axial direction 32 over an entire length 54 of the shift sleeve 26, so that the shift sleeve 26 by an operator of the power tool 10 for switching to different types of drive for the located in the tool holder tool 24 in different switching positions along the Axial direction 32 of the torque sleeve 14 can be moved ( FIGS. 1 to 3 ). The shift sleeve 26 is always independent of the different switching positions along the torque sleeve 14 against rotation connected thereto.

Die Schalthülse 26 nimmt im Betrieb der Handwerkzeugmaschine 10 entlang der Drehmomenthülse 14 in Axialrichtung 32 unterschiedliche Schaltpositionen ein (Figuren 1 bis 3). In einer ersten Schaltposition, in der die Schaltvorrichtung 12 bzw. die Schalthülse 26 in einem reinen Bohrantrieb für das Werkzeug 24 schaltet, ist die Schalthülse 26 über ein nicht näher dargestelltes und für einen Bediener betätigbares Betätigungselement in eine vordere, abtriebsseitige Position gebracht (Figur 1). Dabei überträgt die Schalthülse 26 ein Antriebsmoment auf die Zahnradeinheit 20, die drehbar und in Axialrichtung 32 unbewegbar über ein nicht näher dargestelltes Lager auf der Lagerachse 16 gelagert ist.The switching sleeve 26 receives during operation of the power tool 10 along the torque sleeve 14 in the axial direction 32 different switching positions ( FIGS. 1 to 3 ). In a first switching position, in which the switching device 12 and the switching sleeve 26 switches in a pure drill drive for the tool 24, the shift sleeve 26 is brought via an unspecified and operable for an operator actuator in a front, output side position ( FIG. 1 ). In this case, the shift sleeve 26 transmits a drive torque to the gear unit 20, which is rotatably and immovably mounted in the axial direction 32 via a not-shown bearing on the bearing axis 16.

Die Zahnradeinheit 20 schließt sich dabei drehbar gegenüber der Drehmomenthülse 14 entlang der Axialrichtung 32 der Lagerachse 16 an die Drehmomenthülse 14 bzw. an das Kopplungselement 30 der Drehmomenthülse 14 an. An einem antriebsseitigen Ende 62 der Zahnradeinheit 20 weist diese ein Kopplungselement 28 auf, das von einem an die Zahnradeinheit 20 angeformten Zahnrad gebildet ist und eine Verzahnung aufweist, die an einer radial nach außen gerichteten Oberfläche des Kopplungselements 28 angeordnet ist. Die Verzahnung des Kopplungselements 28 ist dem Kopplungselement 36 der Schalthülse 26 angepasst, so dass ein formschlüssiges Ineinandergreifen des Kopplungselements 36 der Schalthülse 26 und der Verzahnung des Kopplungselements 28 der Zahnradeinheit 20 innerhalb der ersten Schaltposition bzw. bei einem Bohrbetrieb der Handwerkzeugmaschine 10 erzielt wird (Figur 1).The gear unit 20 is connected to the torque sleeve 14 or to the coupling element 30 of the torque sleeve 14 rotatably relative to the torque sleeve 14 along the axial direction 32 of the bearing axis 16. At a drive-side end 62 of the gear unit 20, this has a coupling element 28 which is formed by a toothed wheel 20 integrally formed on the gear unit and has a toothing, which is arranged on a radially outwardly directed surface of the coupling element 28. The toothing of the coupling element 28 is adapted to the coupling element 36 of the switching sleeve 26, so that a positive engagement of the coupling element 36 of the switching sleeve 26 and the toothing of the coupling element 28 of the gear unit 20 within the first switching position or in a drilling operation of the power tool 10 is achieved ( FIG. 1 ).

Die Zahnradeinheit 20 weist zudem ein weiteres Kopplungselement 22 auf, das an einem abtriebsseitigen Ende 64 der Zahnradeinheit 20 angeordnet ist. Das Kopplungselement 22 ist von einem einstückig mit der Zahnradeinheit 20 ausgebildeten Zahnrad gebildet, das an einer radial nach außen gerichteten Oberfläche 66 des Kopplungselements 22 eine Verzahnung aufweist. Zudem greift das Kopplungselement 22 in einem Bohrbetrieb der Handwerkzeugmaschine 10 in ein zum Kopplungselement 22 korrespondierendes, von einem Zahnrad gebildetes Kopplungselement 68, das verdrehsicher am Hammerrohr 40 angeordnet ist. Im Betrieb der Handwerkzeugmaschine 10 wird über die Schalthülse 26 ein Antriebsmoment von der Schalthülse 26 bzw. dem Kopplungselement 36 der Schalthülse 26 auf das Kopplungselement 28 der Zahnradeinheit 20 übertragen und von der Zahnradeinheit 20 bzw. dem weiteren Kopplungselement 22 der Zahnradeinheit 20 auf das Kopplungselement 68 des Hammerrohrs 40 übertragen. Befindet sich die Schalthülse 26 in der abtriebsseitigen Endstellung, deckt das Kopplungselement 36 der Schalthülse 26 ausschließlich das Kopplungselement 30 der Drehmomenthülse 14 und das Kopplungselement 28 der Zahnradeinheit 20 ab, so dass das Werkzeug 24 in einem ausschließlichen Bohrantrieb angetrieben wird (Figur 1).The gear unit 20 also has a further coupling element 22 which is arranged on a driven-side end 64 of the gear unit 20. The coupling element 22 is formed by a gear formed integrally with the gear unit 20, which has a toothing on a radially outwardly directed surface 66 of the coupling element 22. In addition, the coupling element 22 engages in a drilling operation of the power tool 10 in a coupling element 22 corresponding, formed by a gear coupling element 68 which is arranged against rotation on the hammer tube 40. During operation of the handheld power tool 10, a drive torque is transmitted from the shift sleeve 26 or the coupling element 36 of the shift sleeve 26 to the coupling element 28 of the gear unit 20 and from the gear unit 20 and the further coupling element 22 of the gear unit 20 to the coupling element 68th of the hammer tube 40 transmitted. If the shift sleeve 26 is located in the output end position, the coupling element 36 of the shift sleeve 26 covers only the coupling element 30 of the torque sleeve 14 and the coupling element 28 of the gear unit 20, so that the tool 24 is driven in an exclusive drill drive ( FIG. 1 ).

In einer weiteren Schaltposition der Schalthülse 26 überträgt die Schalthülse 26 gleichzeitig ein Antriebsmoment auf das Kopplungselement 28 der Zahnradeinheit 20 und auf die Schlagwerksanordnung 34 bzw. auf ein Kopplungselement 70 der Schlagwerksanordnung 34 (Figur 2). Hierzu ist die Schalthülse 26 in eine mittlere Schaltposition entlang der Axialrichtung 32 der Drehmomenthülse 14 geschoben, in der das Kopplungselement 36 der Schalthülse 26 mit dem abtriebsseitigen Ende 56 noch in Eingriff mit dem Kopplungselement 28 der Zahnradeinheit 20 und mit einem antriebsseitigen Ende 72 in Eingriff mit dem Kopplungselement 70 der Schlagwerksanordnung 34 ist. Die Handwerkzeugmaschine 10 führt somit gleichzeitig eine Bohr- und Meißelbewegung für ein Werkzeug 24 aus. Die Schlagwerksanordnung 34 umfasst einen Taumelfinger 74, der über ein Kugellager 76 auf einer Taumelhülse 78 gelagert ist. Die Taumelhülse 78 ist frei drehbar über ein Lager 80, das von einem Nadellager gebildet ist, auf der Drehmomenthülse 14 gelagert. Zudem ist die Taumelhülse 78 in Axialrichtung 32 unbewegbar auf der Drehmomenthülse 14 gelagert. An einem abtriebsseitigen Ende 82 der Taumelhülse 78 weist diese das Kopplungselement 70 auf, das von einer zur Innenverzahnung des Kopplungselements 36 der Schalthülse 26 korrespondierenden Verzahnung gebildet ist und drehfest an der Taumelhülse 78 angeordnet ist. Über das Kopplungselement 36 der Schalthülse 26 wird das Drehmoment auf das Kopplungselement 70 und somit auf die Taumelhülse 78 übertragen und damit die Schlagwerksanordnung 34 angetrieben.In a further switching position of the shift sleeve 26, the shift sleeve 26 simultaneously transmits a drive torque to the coupling element 28 of the gear unit 20 and to the percussion mechanism assembly 34 or to a coupling element 70 of the impact mechanism arrangement 34 (FIG. FIG. 2 ). For this purpose, the switching sleeve 26 is pushed into a middle shift position along the axial direction 32 of the torque sleeve 14, in which the coupling element 36 of the shift sleeve 26 with the output end 56 still in engagement with the coupling element 28 of the gear unit 20 and with a drive end 72 in engagement with the coupling element 70 of Impact mechanism 34 is. The hand tool 10 thus simultaneously performs a drilling and chisel movement for a tool 24. The percussion mechanism 34 comprises a wobble finger 74, which is mounted on a wobble sleeve 78 via a ball bearing 76. The wobble sleeve 78 is freely rotatably mounted on the torque sleeve 14 via a bearing 80 which is formed by a needle bearing. In addition, the wobble sleeve 78 is immovably mounted on the torque sleeve 14 in the axial direction 32. On a driven-side end 82 of the wobble sleeve 78, this has the coupling element 70, which is formed by a toothing corresponding to the internal toothing of the coupling element 36 of the switching sleeve 26 and rotationally fixed to the wobble sleeve 78 is arranged. Via the coupling element 36 of the shift sleeve 26, the torque is transmitted to the coupling element 70 and thus to the wobble sleeve 78 and thus driven the percussion mechanism 34.

In einer dritten Schaltposition der Schalthülse 26 überträgt diese ausschließlich ein Antriebsmoment auf die Schlagwerksanordnung 34 (Figur 3). Hierbei befindet sich die Schalthülse 26 in einer antriebsseitigen Endstellung auf der Drehmomenthülse 14 bzw. auf der Drehmomenthülse 14 zusammen mit dem Kopplungselement 30, wobei das Kopplungselement 36 der Schalthülse 26 in Axialrichtung 32 vollständig das Kopplungselement 70 der Taumelhülse 78 überdeckt. Das Kopplungselement 36 der Schalthülse 26 und das Kopplungselement 28 der Zahnradeinheit 20 sind in einer entkoppelten Stellung zueinander, so dass das Werkzeug 24 sich in einem ausschließlichen Meißelbetrieb befindet. Zudem wird zusammen mit der Schalthülse 26 ein am abtriebsseitigen Ende 56 der Schalthülse 26 befindliches Arretiermittel 58 verschoben. Das Arretiermittel 58 ist halbkreisartig um die Zahnradeinheit 20 angeordnet. Das Arretiermittel 58 weist eine nicht näher dargestellte, radial nach innen weisende Innenverzahnung auf, die im reinen Meißelbetrieb der Handwerkzeugmaschine in Eingriff mit dem Kopplungselement 28 der Zahnradeinheit 20 ist und die Zahnradeinheit 20 drehfest arretiert, d.h. die Zahnradeinheit 20 befindet sich gegenüber der Schalthülse 26 in einer Ruheposition.In a third shift position of the shift sleeve 26, this exclusively transmits a drive torque to the impact mechanism arrangement 34 (FIG. FIG. 3 ). Here, the switching sleeve 26 is in a drive-side end position on the torque sleeve 14 and on the torque sleeve 14 together with the coupling element 30, wherein the coupling element 36 of the switching sleeve 26 in the axial direction 32 completely covers the coupling element 70 of the wobble sleeve 78. The coupling element 36 of the shift sleeve 26 and the coupling element 28 of the gear unit 20 are in a decoupled position to each other, so that the tool 24 is in an exclusive chisel operation. In addition, a befindliches on the output side end 56 of the shift sleeve 26 locking 58 is moved together with the shift sleeve 26. The locking means 58 is arranged in a semicircle around the gear unit 20. The locking means 58 has a not shown in detail, radially inwardly facing internal toothing, which is in the pure chisel operation of the power tool in engagement with the coupling element 28 of the gear unit 20 and the gear unit 20 locked against rotation, ie, the gear unit 20 is located opposite the shift sleeve 26 in a resting position.

Claims (6)

  1. Portable power tool, in particular a hammer drill, having a percussive drive and a rotary drive and a switching device (12) for switching between different operating modes, wherein the switching device (12) has a torque sleeve (14), a bearing shaft (16), which is connected rigidly to a portable power tool housing (18) and on which the torque sleeve (14) is mounted in a rotatable manner, and a gear wheel unit (20) which is mounted in a rotatable manner on the bearing shaft (16), wherein the switching device (12) furthermore has a switching sleeve (26) which is provided to transmit torque from the torque sleeve (14) to the gear wheel unit (20), characterized in that the switching sleeve (26) has at least one coupling element (36) which transmits a torque to a percussion mechanism arrangement (34) in at least one operating position.
  2. Portable power tool according to Claim 1, characterized in that the gear wheel unit (20) has at least one coupling element (22) which is provided to transmit a torque for a rotary drive of a tool (24).
  3. Portable power tool at least according to Claim 1, characterized in that the gear wheel unit (20) has at least one further coupling element (28) which is provided to transmit a torque from the switching sleeve (26) to the gear wheel unit (20).
  4. Portable power tool at least according to Claim 1, characterized in that the switching device (12) has at least one coupling element (30, 36) which connects the switching sleeve (26) to the torque sleeve (14) for conjoint rotation.
  5. Portable power tool at least according to Claim 1, characterized in that the switching sleeve (26) is arranged so as to be displaceable in an axial direction (32) on the torque sleeve (14).
  6. Portable power tool at least according to Claim 1, characterized in that the switching sleeve (26) is provided, in at least one operating mode, to simultaneously transmit a torque to the gear wheel unit (20) and to a percussion mechanism arrangement (34).
EP07821379.0A 2006-12-01 2007-10-16 Hand-held power tool Not-in-force EP2097224B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610056853 DE102006056853A1 (en) 2006-12-01 2006-12-01 Hand tool
PCT/EP2007/061013 WO2008064953A1 (en) 2006-12-01 2007-10-16 Hand-held power tool

Publications (2)

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EP2097224A1 EP2097224A1 (en) 2009-09-09
EP2097224B1 true EP2097224B1 (en) 2013-12-11

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ID=38983979

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EP07821379.0A Not-in-force EP2097224B1 (en) 2006-12-01 2007-10-16 Hand-held power tool

Country Status (5)

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EP (1) EP2097224B1 (en)
CN (1) CN101541481B (en)
DE (1) DE102006056853A1 (en)
RU (1) RU2453419C2 (en)
WO (1) WO2008064953A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008054692A1 (en) 2008-12-16 2010-06-17 Robert Bosch Gmbh Hand tool
DE102013216545A1 (en) * 2013-08-21 2015-02-26 Robert Bosch Gmbh transmission device
EP3606702A4 (en) 2017-05-05 2021-03-10 Milwaukee Electric Tool Corporation Power tool
CN108927545A (en) * 2018-08-09 2018-12-04 台州来智科技有限公司 A kind of cooling water circulation double mode driving selection drilling equipment

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3819125A1 (en) * 1988-06-04 1989-12-14 Bosch Gmbh Robert DRILLING HAMMER
JPH09239675A (en) 1996-03-08 1997-09-16 Hitachi Koki Co Ltd Operation mode switching device for hammer drill
JP3843914B2 (en) * 2002-08-27 2006-11-08 松下電工株式会社 Hammer drill
DE10355812A1 (en) * 2003-11-28 2005-06-09 Robert Bosch Gmbh Power tool
RU2272118C1 (en) * 2004-09-02 2006-03-20 Открытое Акционерное Общество "Институт Механизированного Инструмента" (ВНИИСМИ) Rotary-percussion machine
DE102004058686A1 (en) * 2004-09-03 2006-03-09 Robert Bosch Gmbh Power tool with a drive that can be switched over between the operating modes drilling, impact drilling, and chiseling
DE102004045117A1 (en) * 2004-09-17 2006-03-23 Robert Bosch Gmbh switching device

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CN101541481A (en) 2009-09-23
RU2453419C2 (en) 2012-06-20
RU2009124771A (en) 2011-01-10
CN101541481B (en) 2011-04-06
DE102006056853A1 (en) 2008-06-05
WO2008064953A1 (en) 2008-06-05
EP2097224A1 (en) 2009-09-09

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