EP2134512B1 - Gearbox device - Google Patents

Gearbox device Download PDF

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Publication number
EP2134512B1
EP2134512B1 EP08708331.7A EP08708331A EP2134512B1 EP 2134512 B1 EP2134512 B1 EP 2134512B1 EP 08708331 A EP08708331 A EP 08708331A EP 2134512 B1 EP2134512 B1 EP 2134512B1
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EP
European Patent Office
Prior art keywords
torque
torque transmission
transmission region
region
transmitting
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.)
Active
Application number
EP08708331.7A
Other languages
German (de)
French (fr)
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EP2134512A1 (en
Inventor
Andre Ullrich
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
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Robert Bosch GmbH
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Publication date
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Publication of EP2134512A1 publication Critical patent/EP2134512A1/en
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Classifications

    • 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
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
    • 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
    • B25D16/003—Clutches specially adapted therefor
    • 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
    • B25D2250/245—Spatial arrangement of components of the tool relative to each other
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18024—Rotary to reciprocating and rotary
    • Y10T74/18032—Rotary to reciprocating or rotary
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/1836—Rotary to rotary
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19219—Interchangeably locked
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19642—Directly cooperating gears
    • Y10T74/19647—Parallel axes or shafts
    • Y10T74/19651—External type

Definitions

  • the invention relates to a transmission device according to the preamble of claim 1,
  • the torque transmission means comprises a first torque transmission region for transmitting torque with a first component and at least one second torque transmission region for transmitting torque with a second component.
  • the DE 920 289 C shows a transmission device for a motor vehicle, in particular an agricultural tractor, with a torque transmitting means having a first torque transmitting portion for transmitting a torque to a component and at least one second Drehmomentüberragungsberelch for transmitting torque to the same component, wherein the torque transmitting means has a portion, which is arranged between the first torque transmission region and the second torque transmission region, wherein the partial region has a radius reduced to the first torque transmission region and the second torque transmission region.
  • the first torque transmission region and the second torque transmission region have at least partially a matching contour for transmitting the torques.
  • a gear device for a drill and chisel hammer with a torque transmitting means having a first torque transmitting portion for transmitting torque with a first component and at least a second torque transmitting portion for transmitting a torque with a second component, wherein the first torque transmitting portion and the second torque transmission region at least partially have a matching contour for transmitting the torques.
  • the invention relates to a transmission device, in particular for a rotary and / or chipping hammer, having a torque transmission means having a first torque transmission region for transmitting torque to a first component and at least a second torque transmission region for transmitting torque to a second component wherein the torque transmitting means comprises at least a portion disposed between the first torque transmitting portion and the second torque transmitting portion, the portion having a radius reduced to the first torque transmitting portion and the second torque transmitting portion, and the first torque transmitting portion and the second torque transmitting portion at least partially coinciding in contour have to transmit the torques.
  • an "at least partially matching contour" is to be understood as meaning that the contours have contour lines overlapping in at least one subarea, in particular overlapping edge contour lines.
  • the first torque transmission region has a smaller tip circle radius than a tip circle radius of the second torque transmission zone at a same root circle radius.
  • the torque transmission means can be particularly advantageously rotatable within the transmission device on a shaft, in particular the shaft are stored, such as on an intermediate shaft of a drill and / or chisel hammer.
  • the torque transmitting means has at least a portion disposed between the first torque transmitting portion and the second torque transmitting portion.
  • the individual torque transmission areas can be limited in at least one direction, so that a torque transmission can be structurally easily interrupted by a displacement of the torque transmitting means relative to a provided for a torque transmission component.
  • the subregion has a contour which differs from the first torque transmission region and the second torque transmission region, whereby additional space can be created for at least one further component and / or at least one further function, such as a switching means and / or a chisel detent
  • the portion has a contour which is sleeve-shaped, wherein a radially outwardly directed surface of the portion at each point an equal, in each case the shortest distance with respect to a central axis of the torque transmitting means.
  • the partial region has a radius reduced in size relative to the first torque transmission region and the second torque transmission region, the partial region can be produced in a particularly cost-effective manner by means of a simple calibration.
  • the transmission device has the first component, which is formed by a sleeve and by means of which a torque on the Torque transmission means is transferable, whereby a large transfer area between the first component and the torque transmitting means can be achieved.
  • a structurally simple switching of the torque transmission by means of an axial displacement of the sleeve can be advantageously achieved.
  • the transmission device has the second component, which is formed by a gear which is non-rotatably mounted on a hammer tube, whereby a direct transmission of torque to a driven means while saving additional components can be advantageously achieved.
  • FIG. 1 is one formed by a hammer drill Hand tool 46 shown.
  • the hand tool 46 comprises a housing 48 and in a front region a tool holder 50 for receiving a tool.
  • the handheld power tool 46 comprises a main handle 52 for operating the power tool 46 and for transmitting power from an operator to the power tool 46.
  • the hand tool 46 has a drive unit 54 formed by an electric motor.
  • the drive torque of the drive unit 54 is a Geüiebevorraum 10 of the power tool 46 to a percussion 56, the sake of clarity in FIG. 2 is shown only partially, and / or transmitted to a rotating, formed by a hammer tube 44 output means 58 ( FIG. 2 ).
  • the transmission device 10 comprises an intermediate shaft 60 and a torque transmission means 12 mounted on the intermediate shaft 60.
  • the torque transmission means 12 has a first torque transmission region 14 and a second torque transmission region 18 for transmitting torque to a first component 16 and a second component 20, respectively Torque transmission regions 14, 18 are disposed on a radially outward surface 24 of the torque transmitting means 12.
  • the first torque-transmitting region 14 is arranged in an axial direction 28 of the torque-transmitting means 12 on a drive-side end portion 62 of the torque transmitting means 12 and the second torque transmitting portion 18 on a driven side end portion 64 of the torque transmitting means 12.
  • the two torque transmitting portions 14, 18 a matching contour 22 to Transmission of the respective torque, wherein the first torque transmitting portion 14 has a smaller tip radius 82 than a tip circle radius 30 of the second torque transmitting portion 18 at a same root radius 32 ( FIG. 3 ).
  • a further subregion 34 of the torque transmission means 12 is arranged, which is sleeve-shaped and has a tooth-free, smooth contour 36.
  • a radius 38 of the partial region 34 is smaller than a root radius 32 of the first torque-transmitting region 14 and of the second torque-transmitting region 18 (FIG. FIG. 2 and 3 ).
  • the torque transmission means 12 can transmit a torque of the intermediate shaft 60 to the hammer tube 44.
  • a driving toothing 66 is pressed against rotation on the intermediate shaft 60.
  • the torque transmission means 12 is arranged on the intermediate shaft 60 after the driving teeth 66.
  • a spring 70 biased is the Torque transmission means 12 against the driving teeth 66 of the intermediate shaft 60 is supported ( FIG. 2 ).
  • a first member 16 which is formed by a sleeve 40, slidably mounted along the axial direction 28.
  • the sleeve 40 has an inner contour (not shown) corresponding to the first torque transmission region 14, and an inner contour corresponding to a driving toothing 66 on a drive-side end region 72.
  • the sleeve 40 is displaceable by means of a switching means 74, which is formed by a switching plate on the torque transmitting means 12 in the axial direction 28, so that during operation of the power tool 46, a torque transmission from the intermediate shaft 60 via the torque transmitting means 12 to the hammer tube 44 of a Operator can be switched on or off.
  • a drive-side end position of the sleeve 40 is shown, which allows a transmission of the drive torque from the intermediate shaft 60 via the driving teeth 66 and the sleeve 40 to the torque transmitting means 12 during operation of the power tool 46.
  • the second torque transmitting portion 18 of the torque transmitting means 12 is provided in the operation of the power tool 46 for torque transmission to the hammer tube 44.
  • a second component 20 which is formed by a gear 42, arranged rotatably on the hammer tube 44.
  • This gear wheel 42 has a transmission contour 76 corresponding to the second torque transmission area 18.
  • the torque of the intermediate shaft 60 is transmitted via the driving teeth 66 and the sleeve 40 to the torque transmitting means 12 and from the torque transmitting means 12 via the gear 42 to the hammer tube 44 during operation of the power tool 46 ( FIG. 2 ).
  • the output-side portion 78 of the shift plate has a corresponding to the second torque transmitting portion 18 contour 80, which is in the driven side position in engagement with the second torque transmitting portion 18 and thus rotation of the torque transmitting means 12 and the hammer tube 44 and one with the hammer tube 44 rotatably connected tool prevents.
  • the sleeve 40 is located in the drive-side end position, a rotation of the torque transmitting means 12 relative to the output side portion 78 of the switch plate during operation of the power tool 46 due to the small radius 38 of Subregion 34 of the torque transmitting means 12 relative to the second Drehmomentübertragurtgs Schemes 18 possible, so that a lock between the portion 34 and the shift plate is canceled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Getriebevorrichtung nach dem Oberbegriff des Anspruchs 1,The invention relates to a transmission device according to the preamble of claim 1,

Es ist bereits eine Getriebevorrichtung bekannt, die ein Drehmomentübertragungsmittel aufweist. Das Drehmomentübertragungsmittel umfasst dabei einen ersten Drehmomentübertragungsbereich zu einer Übertragung eines Drehmoments mit einem ersten Bauteil und zumindest einen zweiten Drehmomentübertragungsbereich zu einer Übertragung eines Drehmoments mit einem zweiten Bauteil.There is already known a transmission device having a torque transmitting means. In this case, the torque transmission means comprises a first torque transmission region for transmitting torque with a first component and at least one second torque transmission region for transmitting torque with a second component.

Die DE 920 289 C zeigt eine Getriebevorrichtung für ein Kraftfahrzeug, insbesondere einen Ackerschlepper, mit einem Drehmomentübertragungsmittel, das einen ersten Drehmomentübertragungsbereich zu einer Übertragung eines Drehmoments auf ein Bauteil und zumindest einen zweiten Drehmomentübenragungsberelch zu einer Übertragung eines Drehmoments auf dasselbe Bauteil aufweist, bei dem das Drehmomentübertragungsmittel einen Teilbereich aufweist, der zwischen dem ersten Drehmomentübertragungsbereich und dem zweiten Drehmomentübertragungsbereich angeordnet ist, wobei der Teilbereich einen zum ersten Drehmomentübertragungsbereich und zum zweiten Drehmomentübertragungsbereich verkleinerten Radius aufweist. Der erste Drehmomentübertragungsbereich und der zweite Drehmomentübertragungsbereich weisen zumindest teilweise eine übereinstimmende Kontur zur Übertragung der Drehmomente auf.The DE 920 289 C shows a transmission device for a motor vehicle, in particular an agricultural tractor, with a torque transmitting means having a first torque transmitting portion for transmitting a torque to a component and at least one second Drehmomentüberragungsberelch for transmitting torque to the same component, wherein the torque transmitting means has a portion, which is arranged between the first torque transmission region and the second torque transmission region, wherein the partial region has a radius reduced to the first torque transmission region and the second torque transmission region. The first torque transmission region and the second torque transmission region have at least partially a matching contour for transmitting the torques.

Aus der EP 0 589 267 A geht ferner eine Getriebevorrichtung für einen Bohr- und Meißelhammer hervor, mit einem Drehmomentübertragungsmittel, das einen ersten Drehmomentübertragungsbereich zu einer Übertragung eines Drehmoments mit einem ersten Bauteil und zumindest einen zweiten Drehmomentübertragungsbereich zu einer Übertragung eines Drehmoments mit einem zweiten Bauteil aufweist, wobei der erste Drehmomentübertragungsbereich und der zweite Drehmomentübertragungsbereich zumindest teilweise eine übereinstimmende Kontur zur Übertragung der Drehmomente aufweisen.From the EP 0 589 267 A Further, a gear device for a drill and chisel hammer, with a torque transmitting means having a first torque transmitting portion for transmitting torque with a first component and at least a second torque transmitting portion for transmitting a torque with a second component, wherein the first torque transmitting portion and the second torque transmission region at least partially have a matching contour for transmitting the torques.

Vorteile der ErfindungAdvantages of the invention

Die Erfindung geht aus von einer Getriebevorrichtung, insbesondere für einen Bohr- und/oder Meißelhammer, mit einem Drehmomentübertragungsmittel, das einen ersten Drehmomentübertragungsbereich zu einer Übertragung eines Drehmoments mit einem ersten Bauteil und zumindest einen zweiten Drehmomentübertragungsbereich zu einer Übertragung eines Drehmoments mit einem zweiten Bauteil aufweist, bei dem das Drehmomentübertragungsmittel zumindest einen Teilbereich aufweist, der zwischen dem ersten Drehmomentübertragungsbereich und dem zweiten Drehmomentübertragungsbereich angeordnet ist, wobei der Teilbereich einen zum ersten Drehmomentübertragungsbereich und zum zweiten Drehmomentübertragungsbereich verkleinerten Radius aufweist, und der erste Drehmomentübertragungsbereich und der zweite Drehmomentübertragungsbereich zumindest teilweise eine übereinstimmende Kontur zur Übertragung der Drehmomente aufweisen. In diesem Zusammenhang soll unter einer "zumindest teilweise übereinstimmenden Kontur" verstanden werden, dass die Konturen in zumindest einem Teilbereich überdeckende Konturlinien, insbesondere überdeckende Flankenkonturlinien aufweisen.The invention relates to a transmission device, in particular for a rotary and / or chipping hammer, having a torque transmission means having a first torque transmission region for transmitting torque to a first component and at least a second torque transmission region for transmitting torque to a second component wherein the torque transmitting means comprises at least a portion disposed between the first torque transmitting portion and the second torque transmitting portion, the portion having a radius reduced to the first torque transmitting portion and the second torque transmitting portion, and the first torque transmitting portion and the second torque transmitting portion at least partially coinciding in contour have to transmit the torques. In this context, an "at least partially matching contour" is to be understood as meaning that the contours have contour lines overlapping in at least one subarea, in particular overlapping edge contour lines.

Erfindungsgemäß weist der erste Drehmomentübertragungsbereich einen kleineren Kopfkreisradius als ein Kopfkreisradius des zweiten Drehmomentübertragungsbereichs bei einem gleichen Fußkreisradius auf. Dadurch ergibt sich eine besonders vorteilhafte räumliche Anpassung an unterschiedliche Bauteile zur Drehmomentübertragung. Vorteilhaft ist weiterhin, dass sich das Drehmomentübertragungsmittel kostengünstig und in einem einfachen Fertigungsverfahren über ein Stanzen, ein Fräsen, ein Pressen usw. herstellen lässt. Die erfindungsgemäße Getriebevorrichtung kann besonders vorteilhaft in Verbindung mit einem Bohr- und/oder Meißelhammer eingesetzt werden aufgrund der unterschiedlichen zu realisierenden Getriebestufen. Prinzipiell kann die Getriebevorrichtung jedoch auch mit weiteren, dem Fachmann als sinnvoll erscheinenden Werkzeugmaschinen, insbesondere Handwerkzeugmaschinen eingesetzt werden.According to the invention, the first torque transmission region has a smaller tip circle radius than a tip circle radius of the second torque transmission zone at a same root circle radius. This results in a particularly advantageous spatial adaptation to different components for torque transmission. A further advantage is that the torque transmission means can be produced inexpensively and in a simple manufacturing process via punching, milling, pressing, etc. The transmission device according to the invention can be used particularly advantageously in conjunction with a drill and / or chisel hammer due to the different gear stages to be realized. In principle, however, the transmission device can also be used with other machine tools, in particular hand-held power tools, that appear appropriate to the person skilled in the art.

Sind der erste Drehmomentübertragungsbereich und der zweite Drehmomentübertragungsbereich an einer radial nach außen gerichteten Oberfläche des Drehmomentübertragungsmittels angeordnet, kann dabei das Drehmomentübertragungsmittel besonders vorteilhaft innerhalb der Getriebevorrichtung auf einer Welle, insbesondere drehbar auf der Welle gelagert werden, wie beispielsweise auf einer Zwischenwelle eines Bohr- und/oder Meißelhammers.If the first torque transmission region and the second torque transmission region are arranged on a radially outwardly directed surface of the torque transmission means, the torque transmission means can be particularly advantageously rotatable within the transmission device on a shaft, in particular the shaft are stored, such as on an intermediate shaft of a drill and / or chisel hammer.

Das Drehmomentübertragungsmittel weist zumindest einen Teilbereich auf, der zwischen dem ersten Drehmomentübertragungsbereich und dem zweiten Drehmomentübertragungsbereich angeordnet ist. Hierdurch können die einzelnen Drehmomentübertragungsbereiche in zumindest eine Richtung eingeschränkt werden, so dass durch ein Verschieben des Drehmomentübertragungsmittels relativ zu einem für eine Drehmomentübertragung vorgesehenen Bauteil eine Drehmomentübertragung konstruktiv einfach unterbrochen werden kann.The torque transmitting means has at least a portion disposed between the first torque transmitting portion and the second torque transmitting portion. As a result, the individual torque transmission areas can be limited in at least one direction, so that a torque transmission can be structurally easily interrupted by a displacement of the torque transmitting means relative to a provided for a torque transmission component.

Des Weiteren wird vorgeschlagen, dass der Teilbereich eine zum ersten Drehmomentübertragungsbereich und zum zweiten Drehmomentübertragungsbereich unterschiedliche Kontur aufweist, wodurch zusätzlicher Bauraum für zumindest ein weiteres Bauteil und/oder wenigstens einer weiteren Funktion geschaffen werden kann, wie beispielsweise ein Schaltmittel und/oder ein zu einer Meißelarretierung vorgesehenes Bauteil- Vorzugsweise weist der Teilbereich eine Kontur auf, die hülsenförmig ausgebildet ist, wobei eine radial nach außen gerichtete Oberfläche des Teilbereichs an jedem Punkt einen gleichen, und zwar jeweils den kürzesten Abstand bezüglich einer Mittelachse des Drehmomentübertragungsmittels aufweist.Furthermore, it is proposed that the subregion has a contour which differs from the first torque transmission region and the second torque transmission region, whereby additional space can be created for at least one further component and / or at least one further function, such as a switching means and / or a chisel detent Provided Component- Preferably, the portion has a contour which is sleeve-shaped, wherein a radially outwardly directed surface of the portion at each point an equal, in each case the shortest distance with respect to a central axis of the torque transmitting means.

Weist der Teilbereich einen zum ersten Drehmomentübertragungsbereich und zum zweiten Drehmomentübertragungsbereich verkleinerten Radius auf, kann der Teilbereich mittels eines einfachen Abdrehens besonders kostengünstig hergestellt werden.If the partial region has a radius reduced in size relative to the first torque transmission region and the second torque transmission region, the partial region can be produced in a particularly cost-effective manner by means of a simple calibration.

In einer weiteren Ausgestaltung der Erfindung wird vorgeschlagen, dass die Getriebevorrichtung das erste Bauteil aufweist, das von einer Hülse gebildet ist und mittels dem ein Drehmoment auf das
Drehmomentübertragungsmittel übertragbar ist, wodurch eine große Übertragungsfläche zwischen dem ersten Bauteil und dem Drehmomentübertragungsmittel erreicht werden kann. Zudem kann ein konstruktiv einfaches Schalten der Drehmomentübertragung mittels eines axialen Verschiebens der Hülse vorteilhaft erreicht werden.In a further embodiment of the invention, it is proposed that the transmission device has the first component, which is formed by a sleeve and by means of which a torque on the
Torque transmission means is transferable, whereby a large transfer area between the first component and the torque transmitting means can be achieved. In addition, a structurally simple switching of the torque transmission by means of an axial displacement of the sleeve can be advantageously achieved.

Des Weiteren wird vorgeschlagen, dass die Getriebevorrichtung das zweite Bauteil aufweist, das von einem Zahnrad, das drehfest auf einem Hammerrohr angeordnet ist, gebildet ist, wodurch ein direkte Übertragung eines Drehmoments auf ein Abtriebsmittel unter Einsparung zusätzlicher Bauteile vorteilhaft erreicht werden kann.Furthermore, it is proposed that the transmission device has the second component, which is formed by a gear which is non-rotatably mounted on a hammer tube, whereby a direct transmission of torque to a driven means while saving additional components can be advantageously achieved.

Zeichnungdrawing

Weitere Vorteile ergeben sich aus der folgenden
Zeichnungsbeschreibung. In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen. Es zeigen:

Fig. 1
eine Handwerkzeugmaschine mit einer erfindungsgemäßen Getriebevorrichtung,
Fig. 2
die Getriebevorrichtung in einer dreidimensionalen Schnittansicht,
Fig. 3
ein Drehmomentübertragungsmittel aus Figur 2 in einer dreidimensionalen Schnittansicht und
Fig. 4
ein Drehmomentübertragungsmittel, das nicht zur Erfindung gehört, in einer dreidimensionalen Schnittansicht.
Further advantages result from the following
Drawing description. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations. Show it:
Fig. 1
a hand tool with a transmission device according to the invention,
Fig. 2
the transmission device in a three-dimensional sectional view,
Fig. 3
a torque transmitting means FIG. 2 in a three-dimensional sectional view and
Fig. 4
a torque transmission means, not belonging to the invention, in a three-dimensional sectional view.

Beschreibung der AusführungsbeispieleDescription of the embodiments

In Figur 1 ist eine von einem Bohrhammer gebildete
Handwerkzeugmaschine 46 dargestellt. Die Handwerkzeugmaschine 46 umfasst ein Gehäuse 48 und in einem Frontbereich eine Werkzeugaufnahme 50 zu einer Aufnahme eines Werkzeugs. An einer dem Frontbereich abgewandten Seite umfasst die Handwerkzeugmaschine 46 einen Haupthandgriff 52 zu einem Betätigen der Handwerkzeugmaschine 46 und zu einer Kraftübertragung von einem Bediener auf die Handwerkzeugmaschine 46.In FIG. 1 is one formed by a hammer drill
Hand tool 46 shown. The hand tool 46 comprises a housing 48 and in a front region a tool holder 50 for receiving a tool. On a side facing away from the front region, the handheld power tool 46 comprises a main handle 52 for operating the power tool 46 and for transmitting power from an operator to the power tool 46.

Zu einer Erzeugung eines Antriebsmoments weist die Handwerkzeugmaschine 46 eine von einem Elektromotor gebildete Antriebseinheit 54 auf. Das Antriebsmoment der Antriebseinheit 54 wird über eine Geüiebevorrichtung 10 der Handwerkzeugmaschine 46 an ein Schlagwerk 56, das der Übersichtlichkeit wegen in Figur 2 nur teilweise dargestellt ist, und/oder an ein rotierendes, von einem Hammerrohr 44 gebildetes Abtriebsmittel 58 übertragen (Figur 2).To generate a drive torque, the hand tool 46 has a drive unit 54 formed by an electric motor. The drive torque of the drive unit 54 is a Geüiebevorrichtung 10 of the power tool 46 to a percussion 56, the sake of clarity in FIG. 2 is shown only partially, and / or transmitted to a rotating, formed by a hammer tube 44 output means 58 ( FIG. 2 ).

Die Getriebevorrichtung 10 umfasst eine Zwischenwelle 60 und ein auf der Zwischenwelle 60 gelagertes Drehmomentübertragungsmittel 12. Das Drehmomentübertragungsmittel 12 weist einen ersten Drehmomentübertragungsbereich 14 und einen zweiten Drehmomentübertragungsbereich 18 auf zu einer Übertragung eines Drehmoments mit einem ersten Bauteil 16 bzw. einem zweiten Bauteil 20. Die beiden Drehmomentübertragungsbereiche 14, 18 sind an einer radial nach außen gerichteten Oberfläche 24 des Drehmomentübertragungsmittels 12 angeordnet. Der erste Drehmomentübertragungsbereich 14 ist dabei in einer axialen Richtung 28 des Drehmomentübertragungsmittels 12 an einem antriebsseitigen Endbereich 62 des Drehmomentübertragungsmittels 12 angeordnet und der zweite Drehmomentübertragungsbereich 18 an einem abtriebsseitigen Endbereich 64 des Drehmomentübertragungsmittels 12. Zudem weisen die beiden Drehmomentübertragungsbereiche 14, 18 eine übereinstimmende Kontur 22 zur Übertragung des jeweiligen Drehmoments auf, wobei der erste Drehmomentübertragungsbereich 14 einen kleineren Kopfkreisradius 82 als ein Kopfkreisradius 30 des zweiten Drehmomentübertragungsbereichs 18 bei einem gleichen Fußkreisradius 32 aufweist (Figur 3).The transmission device 10 comprises an intermediate shaft 60 and a torque transmission means 12 mounted on the intermediate shaft 60. The torque transmission means 12 has a first torque transmission region 14 and a second torque transmission region 18 for transmitting torque to a first component 16 and a second component 20, respectively Torque transmission regions 14, 18 are disposed on a radially outward surface 24 of the torque transmitting means 12. The first torque-transmitting region 14 is arranged in an axial direction 28 of the torque-transmitting means 12 on a drive-side end portion 62 of the torque transmitting means 12 and the second torque transmitting portion 18 on a driven side end portion 64 of the torque transmitting means 12. In addition, the two torque transmitting portions 14, 18 a matching contour 22 to Transmission of the respective torque, wherein the first torque transmitting portion 14 has a smaller tip radius 82 than a tip circle radius 30 of the second torque transmitting portion 18 at a same root radius 32 ( FIG. 3 ).

Zwischen dem ersten Drehmomentübertragungsbereich 14 und dem zweiten Drehmomentübertragungsbereich 18 ist ein weiterer Teilbereich 34 des Drehmömentübertragungsmittels 12 angeordnet, der hülsenförmig ausgebildet ist und eine verzahnungslose, glatte Kontur 36 aufweist.Between the first torque transmission region 14 and the second torque transmission region 18, a further subregion 34 of the torque transmission means 12 is arranged, which is sleeve-shaped and has a tooth-free, smooth contour 36.

Ein Radius 38 des Teilbereichs 34 ist dabei kleiner als ein Fußkreisradius 32 des ersten Drehmomentübertragungsbereichs 14 und des zweiten Drehmomentübertragungsbereichs 18 (Figur 2 und 3).A radius 38 of the partial region 34 is smaller than a root radius 32 of the first torque-transmitting region 14 and of the second torque-transmitting region 18 (FIG. FIG. 2 and 3 ).

Das Drehmomentübertragungsmittel 12 kann im Betrieb der Getriebevorrichtung 10 bzw. der Handwerkzeugmaschine 46 ein Drehmoment der Zwischenwelle 60 auf das Hammerrohr 44 übertragen. Hierzu ist auf der Zwischenwelle 60 drehfest eine Mitnahmeverzahnung 66 aufgepresst. Entlang einer Kraftflussrichtung 68 ist auf der Zwischenwelle 60 das Drehmomentübertragungsmittel 12 nach der Mitnahmeverzahnung 66 angeordnet. Nach dem Drehmomentübertragungsmittel 12 ist weiterhin in Kraftflussrichtung 68 auf der Zwischenwelle 60 eine Feder 70 vorgespannt angeordnet.
Aufgrund einer Federkraft der Feder 70 ist das
Drehmomentübertragungsmittel 12 gegen die Mitnahmeverzahnung 66 der Zwischenwelle 60 abgestützt (Figur 2).During operation of the transmission device 10 or of the handheld power tool 46, the torque transmission means 12 can transmit a torque of the intermediate shaft 60 to the hammer tube 44. For this purpose, a driving toothing 66 is pressed against rotation on the intermediate shaft 60. Along a force flow direction 68, the torque transmission means 12 is arranged on the intermediate shaft 60 after the driving teeth 66. After the torque transmission means 12 is further arranged in the direction of force flow 68 on the intermediate shaft 60, a spring 70 biased.
Due to a spring force of the spring 70 is the
Torque transmission means 12 against the driving teeth 66 of the intermediate shaft 60 is supported ( FIG. 2 ).

Um ein Drehmoment von der Zwischenwelle 60 bzw. der
Mitnahmeverzahnung 66 der Zwischenwelle 60 auf das
Drehmomentübertragungsmittel 12 zu übertragen, ist auf dem Drehmomentübertragungsmittel 12 ein erstes Bauteil 16, das von einer Hülse 40 gebildet ist, entlang der axialen Richtung 28 verschiebbar gelagert. Die Hülse 40 weist dabei eine zum ersten Drehmomentübertragungsbereich 14 korrespondierende, nicht näher dargestellte Innenkontur auf und an einem antriebsseitigen Endbereich 72 eine zu Mitnahmeverzahnung 66 korrespondierende Innenkontur. Die Hülse 40 ist mittels eines Schaltmittels 74, das von einem Schaltblech gebildet ist, auf dem Drehmomentübertragungsmittel 12 in der axialen Richtung 28 verschiebbar, so dass im Betrieb der Handwerkzeugmaschine 46 eine Drehmomentübertragung von der Zwischenwelle 60 über das Drehmomentübertragungsmittel 12 auf das Hammerohr 44 von einem Bediener zu- bzw. abgeschaltet werden kann. In Figur 2 ist eine antriebsseitige Endposition der Hülse 40 dargestellt, die im Betrieb der Handwerkzeugmaschine 46 eine Übertragung des Antriebsmoments von der Zwischenwelle 60 über die Mitnahmeverzahnung 66 und die Hülse 40 auf das Drehmomentübertragungsmittel 12 ermöglicht. Wird die Hülse 40 mittels des Schaltmittels 74 in Richtung des zweiten Drehmomentübertragungsbereichs 18 geschoben, wird die mit der Mitnahmeverzahnung 66 korrespondierende Innenverzahnung der Hülse 40 aus dem Wirkbereich der Mitnahmeverzahnung 66 geschoben und eine Drehmomentübertragung zwischen der Zwischenwelle 60 und dem Drehmomentübertragungsmittel 12 bzw. der Mitnahmeverzahnung 66 und der Hülse 40 ist unterbrochen.
Der zweite Drehmomentübertragungsbereich 18 des Drehmomentübertragungsmittels 12 ist im Betrieb der Handwerkzeugmaschine 46 zu einer Drehmomentübertragung auf das Hammerrohr 44 vorgesehen. Hierzu ist auf dem Hammerohr 44 ein zweites Bauteil 20, das von einem Zahnrad 42 gebildet ist, drehfest angeordnet. Dieses Zahnrad 42 weist eine zum zweiten Drehmomentübertragungsbereich 18 korrespondierende Übertragungskontur 76 auf. Ist die Hülse 40 in der antriebsseitigen Endposition, wird im Betrieb der Handwerkzeugmaschine 46 das Drehmoment der Zwischenwelle 60 über die Mitnahmeverzahnung 66 und die Hülse 40 auf das Drehmomentübertragungsmittel 12 und von dem Drehmomentübertragungsmittel 12 über das Zahnrad 42 auf das Hammerrohr 44 übertragen (Figur 2).To a torque of the intermediate shaft 60 and the
Mitnahmeverzahnung 66 of the intermediate shaft 60 on the
To transmit torque transmitting means 12, is on the torque transmitting means 12, a first member 16 which is formed by a sleeve 40, slidably mounted along the axial direction 28. In this case, the sleeve 40 has an inner contour (not shown) corresponding to the first torque transmission region 14, and an inner contour corresponding to a driving toothing 66 on a drive-side end region 72. The sleeve 40 is displaceable by means of a switching means 74, which is formed by a switching plate on the torque transmitting means 12 in the axial direction 28, so that during operation of the power tool 46, a torque transmission from the intermediate shaft 60 via the torque transmitting means 12 to the hammer tube 44 of a Operator can be switched on or off. In FIG. 2 a drive-side end position of the sleeve 40 is shown, which allows a transmission of the drive torque from the intermediate shaft 60 via the driving teeth 66 and the sleeve 40 to the torque transmitting means 12 during operation of the power tool 46. Will the sleeve 40 pushed by means of the switching means 74 in the direction of the second torque transmitting portion 18, the corresponding with the driving teeth 66 internal teeth of the sleeve 40 is pushed out of the effective range of the driving gear 66 and a torque transmission between the intermediate shaft 60 and the torque transmitting means 12 and the driving teeth 66 and the sleeve 40 is interrupted.
The second torque transmitting portion 18 of the torque transmitting means 12 is provided in the operation of the power tool 46 for torque transmission to the hammer tube 44. For this purpose, a second component 20, which is formed by a gear 42, arranged rotatably on the hammer tube 44. This gear wheel 42 has a transmission contour 76 corresponding to the second torque transmission area 18. If the sleeve 40 in the drive-side end position, the torque of the intermediate shaft 60 is transmitted via the driving teeth 66 and the sleeve 40 to the torque transmitting means 12 and from the torque transmitting means 12 via the gear 42 to the hammer tube 44 during operation of the power tool 46 ( FIG. 2 ).

Befindet sich im Betrieb der Handwerkzeugmaschine 46 die Hülse 40 in einer abtriebsseitigen Position, ist eine Drehmomentübertragung mittels der Hülse 40 auf das Drehmomentübertragungsmittel 12 unterbrochen und es wird mittels des Schaltblechs bzw. eines abtriebsseitigen Teilbereichs 78 des Schaltblechs eine Meißelarretierung realisiert. Hierzu weist der abtriebsseitige Teilbereich 78 des Schaltblechs eine zu dem zweiten Drehmomentübertragungsbereich 18 korrespondierende Kontur 80 auf, die in der abtriebsseitigen Position in Eingriff mit dem zweiten Drehmomentübertragungsbereich 18 ist und somit eine Drehung des Drehmomentübertragungsmittels 12 bzw. des Hammerrohrs 44 bzw. eines mit dem Hammerrohr 44 drehfest verbundenen Werkzeugs verhindert. Befindet sich die Hülse 40 in der antriebsseitigen Endposition, ist eine Drehung des Drehmomentübertragungsmittels 12 gegenüber dem abtriebsseitigen Teilbereich 78 des Schaltblechs im Betrieb der Handwerkzeugmaschine 46 aufgrund des geringen Radius 38 des Teilbereichs 34 des Drehmomentübertragungsmittets 12 gegenüber des zweiten Drehmomentübertragurtgsbereichs 18 möglich, so dass eine Arretierung zwischen dem Teilbereich 34 und dem Schaltblech aufgehoben ist.If, during operation of the handheld power tool 46, the sleeve 40 is in an output-side position, a torque transmission by means of the sleeve 40 to the torque transmission means 12 is interrupted and a chisel lock is realized by means of the shift plate or an output-side partial region 78 of the shift plate. For this purpose, the output-side portion 78 of the shift plate has a corresponding to the second torque transmitting portion 18 contour 80, which is in the driven side position in engagement with the second torque transmitting portion 18 and thus rotation of the torque transmitting means 12 and the hammer tube 44 and one with the hammer tube 44 rotatably connected tool prevents. The sleeve 40 is located in the drive-side end position, a rotation of the torque transmitting means 12 relative to the output side portion 78 of the switch plate during operation of the power tool 46 due to the small radius 38 of Subregion 34 of the torque transmitting means 12 relative to the second Drehmomentübertragurtgsbereichs 18 possible, so that a lock between the portion 34 and the shift plate is canceled.

Claims (6)

  1. Gear apparatus, in particular for a hammer drill and/or chisel hammer, having a torque transmission means (12) which has a first torque transmission region (14) for transmitting a torque by way of a first component (16) and at least one second torque transmission region (18) for transmitting a torque by way of a second component (20), in which the torque transmission means (12) has at least one part region (34) which is arranged between the first torque transmission region (14) and the second torque transmission region (18), the part region (34) having a radius (38) which is reduced with respect to the first torque transmission region (14) and with respect to the second torque transmission region (18), and the first torque transmission region (14) and the second torque transmission region (18) having at least partially a coinciding contour (22) for transmitting the torques, characterized in that the first torque transmission region (14) has a smaller tip circle radius (82) than a tip circle radius (30) of the second torque transmission region (18) with an identical root circle radius (32).
  2. Gear apparatus according to Claim 1, characterized in that the first torque transmission region (14) and the second torque transmission region (18) are arranged on a radially outwardly directed surface (24) of the torque transmission means (12).
  3. Gear apparatus according to one of the preceding claims, characterized in that the part region (34) has a contour (36) which is different from the first torque transmission region (14) and from the second torque transmission region (18).
  4. Gear apparatus according to one of the preceding claims, characterized by the first component (16) which is formed by a sleeve (40), by means of which a torque can be transmitted to the torque transmission means (12).
  5. Gear apparatus according to one of the preceding claims, characterized by the second component (20) which is formed by a gearwheel (42) which is arranged fixedly on a hammer tube (44) so as to rotate with it.
  6. Hammer drill and/or chisel hammer having a gear apparatus (10) according to one of the preceding claims.
EP08708331.7A 2007-03-02 2008-01-29 Gearbox device Active EP2134512B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007010179A DE102007010179A1 (en) 2007-03-02 2007-03-02 Transmission device for hand-held power tool has torque transmission regions with at least partly coinciding outline to transmit torque
PCT/EP2008/051014 WO2008107232A1 (en) 2007-03-02 2008-01-29 Gearbox device

Publications (2)

Publication Number Publication Date
EP2134512A1 EP2134512A1 (en) 2009-12-23
EP2134512B1 true EP2134512B1 (en) 2013-10-09

Family

ID=39198278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08708331.7A Active EP2134512B1 (en) 2007-03-02 2008-01-29 Gearbox device

Country Status (6)

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US (2) US8176994B2 (en)
EP (1) EP2134512B1 (en)
CN (1) CN101641188B (en)
DE (1) DE102007010179A1 (en)
RU (1) RU2467866C2 (en)
WO (1) WO2008107232A1 (en)

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DE102007010179A1 (en) * 2007-03-02 2008-09-04 Robert Bosch Gmbh Transmission device for hand-held power tool has torque transmission regions with at least partly coinciding outline to transmit torque
CN101758486B (en) * 2010-01-21 2011-09-28 浙江海王电器有限公司 Light single-button multifunctional electric hammer
DE102010002672A1 (en) * 2010-03-09 2011-09-15 Robert Bosch Gmbh hammer drill device
US20130068057A1 (en) * 2011-09-16 2013-03-21 Hamilon Sundstrand Corporation Idler gear assembly for a generator
EP2774234A4 (en) 2011-10-31 2015-10-07 Bosch Automotive Service Solutions Llc Vehicle communication component and process having active overvoltage protection
CN103894983A (en) * 2012-12-26 2014-07-02 株式会社牧田 Hammer drill
US10518399B2 (en) * 2015-09-30 2019-12-31 Chervon (Hk) Limited Clutch device and power tool with clutch device

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DE4441793A1 (en) * 1994-11-24 1996-05-30 Bosch Gmbh Robert Switch for hand operated tool esp. rotary drill

Also Published As

Publication number Publication date
DE102007010179A1 (en) 2008-09-04
WO2008107232A1 (en) 2008-09-12
US20100319946A1 (en) 2010-12-23
CN101641188B (en) 2014-03-05
CN101641188A (en) 2010-02-03
US8176994B2 (en) 2012-05-15
US20120193116A1 (en) 2012-08-02
RU2467866C2 (en) 2012-11-27
RU2009136312A (en) 2011-04-10
EP2134512A1 (en) 2009-12-23
US8342259B2 (en) 2013-01-01

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