EP2451615B1 - Drill- and/or percussion apparatus - Google Patents

Drill- and/or percussion apparatus Download PDF

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Publication number
EP2451615B1
EP2451615B1 EP10724336.2A EP10724336A EP2451615B1 EP 2451615 B1 EP2451615 B1 EP 2451615B1 EP 10724336 A EP10724336 A EP 10724336A EP 2451615 B1 EP2451615 B1 EP 2451615B1
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EP
European Patent Office
Prior art keywords
bearing
intermediate shaft
bearing plate
rotary hammer
drive
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Active
Application number
EP10724336.2A
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German (de)
French (fr)
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EP2451615A1 (en
Inventor
Hardy Schmid
Holger Ruebsaamen
Tobias Herr
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2451615A1 publication Critical patent/EP2451615A1/en
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Publication of EP2451615B1 publication Critical patent/EP2451615B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/062—Means for driving the impulse member comprising a wobbling mechanism, swash plate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/065—Details regarding assembling of the tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/331—Use of bearings
    • B25D2250/335—Supports therefor

Definitions

  • the invention relates to a hammer drill and / or chisel device according to the preamble of claim 1.
  • a hammer drill and / or chisel device according to the preamble of claim 1.
  • Such a device is from the EP 0771620 A1 known.
  • the invention relates to a hammer drill and / or chisel device, with a striking mechanism and an intermediate shaft, which are each mounted substantially parallel to an axial direction, and with a transmission housing and an intermediate flange.
  • a "hammer drill” should be understood in this context in particular a hand-operated drill with a percussion known type, in which a striking energy of the percussion is independent of a pressing force exerted by an operator of the hammer drill.
  • the percussion mechanism is formed by a drive piston, a racket driven by the drive piston, a percussion tube supporting the drive piston and the bait and possibly a percussion piston.
  • a “chiseling device” is to be understood in this context in particular a hand-operated chisel or percussion hammer with a percussion of the type described above, in which a striking energy of the percussion is independent of a pressing force by an operator of the chisel or Schlaghammer is exercised.
  • an "axial direction” is to be understood as meaning in particular a direction parallel to a direction of flight of the racket during operation of the hammer drill and / or chisel device.
  • the drilling and / or chiseling device comprises a bearing plate, which is releasably connected to the intermediate flange and intended to support the intermediate shaft and at least one component of the percussion mechanism, whereby a simple, material and space-saving and therefore cost-effective solution can be provided for a fixation and storage of the intermediate shaft and a component of the impact mechanism.
  • the mounted in the bearing plate component of the impact mechanism may be a hollow piston.
  • provided in a known manner for guiding the hollow piston percussion tube can be greatly shortened, whereby material and space can be saved and a particularly cost-effective solution can be provided.
  • the intermediate flange fixes the end shield in the axial direction.
  • This allows a particularly simple and inexpensive fixation and storage of the intermediate shaft and a component of the impact mechanism can be achieved.
  • other methods familiar to the person skilled in the art and means for fastening the end shield are also possible.
  • the drilling and / or chiseling device can have at least one screw connection, which is intended to detachably connect the end shield to the intermediate flange in at least one operating state. It is particularly advantageous if the end shield has a tension element which is provided to produce a clamping of the end shield between the intermediate flange and the gearbox in at least one operating state.
  • the fixation of the bearing plate in the axial direction is achieved by a clamping between the intermediate flange and the gear housing, wherein the tension element with at least one corresponding element of the gear housing and / or the intermediate flange in a mounting after application of a force acting in the axial direction in a radial Create direction permanent acting clamping force.
  • a radial direction is in this context in particular a direction are understood, which, starting from the axial direction axis, is perpendicular to this.
  • the tension element may be formed as an inclined surface. This can be achieved in a particularly simple and component-saving way clamping and thus fixing the bearing plate.
  • the bearing plate for supporting the intermediate shaft on a bearing with a bearing outer element which is detachably connected to the intermediate flange, whereby a material and space-saving and thus cost-effective solution of fixing and supporting the intermediate shaft can be achieved.
  • the bearing outer element can be releasably connected to the intermediate flange by at least one screw.
  • other means known to those skilled in the production of a detachable connection between the bearing outer element and the intermediate flange can be used.
  • the bearing plate for supporting the intermediate shaft has a bearing with a bearing inner element, which is integrally formed with an inner ring of at least one drive bearing and at least one ground ball raceway, whereby the bearing can be configured in a simple and space-saving.
  • bearing balls can absorb axial and radial forces occurring during operation by means of the ground ball raceway.
  • a "drive bearing” is to be understood as meaning, in particular, a bearing that can be connected to the intermediate shaft in a fixed manner or with a device provided for this purpose, which is intended to rotate the driven intermediate shaft into a reciprocating motion of another or at least one operating state other components of the hammer drill and / or chisel device.
  • the drive bearing is preferably provided together with a wobble drive for converting a rotational movement of a shaft, such as an intermediate shaft, into a reciprocating motion for generating an axial impact pulse.
  • the bearing plate for supporting the intermediate shaft comprises a bearing with a separate from an inner ring of a drive bearing intermediate piece, which has on an outer side an inner ball track of the bearing and is equipped on an inner side with a plain bearing for supporting the intermediate shaft.
  • the bearing can be designed to save space and cost.
  • the bearing balls can absorb forces occurring during operation in the axial and radial directions, and the inner plain bearing surface can advantageously support the intermediate shaft.
  • a particularly simple and compact solution can be provided if the separate intermediate piece produces a form-locking connection with at least one inner ring of a drive bearing.
  • the bearing plate for supporting the intermediate shaft comprises a bearing having a bearing inner element with at least one ball race, which is integrally formed with an inner ring of a first drive bearing and connected by a press connection with an inner ring of a second drive bearing.
  • the bearing plate for supporting the intermediate shaft on a bearing comprising a combination of a needle bearing and a thrust bearing, wherein an element of the needle bearing is integrally formed with an element of the thrust bearing.
  • the bearing plate for supporting the intermediate shaft has a bearing which, viewed in the axial direction, is arranged between two drive bearings of the intermediate shaft.
  • Fig. 1 shows a schematic representation of a hammer drill and Chisel réelle with a gear housing 10, a motor housing 12, a handle 16 and an actuating switch 18.
  • a gear housing 10 At the transition point between the motor housing 12 and the gear housing 10, an intermediate flange 20 is arranged, which projects into the gear housing 10.
  • a tool holder 22 is partially disposed in a striking mechanism tube 26 at a drilling direction end of the hammer drill and chisel device.
  • a percussion 24 within the gear housing 10 includes in addition to the percussion tube 26 in a known manner a firing pin 28, a guided in percussion tube 26, designed as a hollow piston 32 drive piston and guided in the hollow piston 32 racket 30.
  • the hollow piston 32 is formed on a trained as a wobble drive gear Hinged 34 which is driven by a formed as a toothed shaft intermediate shaft 36 of a motor housing 12 arranged in the engine 14.
  • An axial direction is determined by a direction of flight of the beater 30 in the hollow piston 32 during operation of the hammer drill and chisel device.
  • the striking mechanism 24, the motor 14 and the intermediate shaft 36 are each mounted parallel to the axial direction. Radial directions are defined as perpendicular to and from the axial direction.
  • Fig. 2 is a detail view of the gear housing 10 of the hammer drill and M adoptedeigiquess according to the Fig. 1 shown.
  • a bearing plate 38 is detachably connected, which is intended to support the intermediate shaft 36 and a component of the striking mechanism 24, namely the hollow piston 32.
  • In the axial direction of the bearing plate 38 is fixed by the intermediate flange 20.
  • the bearing plate 38 has an oversize in the axial direction, so that when mounting the bearing plate 38 between the intermediate flange 20 and the gear housing 10, a clamping by a permanently acting force in the axial direction is generated.
  • a trained as an inclined surface on an outer edge of the bearing plate 38 tension member 40 is provided to produce in at least one operating condition, a clamping of the bearing plate 38 in the radial direction between the intermediate flange 20 and the gear housing 10 and acts to such a paragraph 42 in the gear housing 10 and a closing edge 44 of the intermediate flange 20 together that generates a force acting in the axial direction during assembly permanently acting in the axial and radial direction clamping forces.
  • the bearing plate 38 is equipped with a sliding bearing 39 for mounting the hollow piston 32.
  • the bearing plate 38 has a bearing 46 with a bearing outer element 48, which is fitted into a recess 50 of the bearing plate 38.
  • a bearing inner element 52 of the bearing 46 is formed integrally with an inner ring 54 of the drive bearing 34 and has a ground ball raceway 56.
  • Fig. 3 shows a further embodiment of a bearing plate 58 for supporting an intermediate shaft 60.
  • the bearing plate 58 comprises for supporting the intermediate shaft 60, a bearing 62 with a separate from an inner ring 64 of a drive bearing 68 intermediate piece 72.
  • the intermediate piece 72 On an outer side, the intermediate piece 72 has an inner ball track 74 of the Camp 62 on.
  • the intermediate piece 72 is equipped with a sliding bearing 76 for supporting the intermediate shaft 60.
  • inner rings 64, 66 of two drive bearings 68, 70 are arranged in front of and behind the intermediate piece, with which the intermediate piece 72 forms a positive connection.
  • the bearing 62 for supporting the intermediate shaft 60 has a bearing outer element 78 which is releasably connected to an intermediate flange 80 by means of a screw connection.
  • a further embodiment of a bearing plate 82 for supporting an intermediate shaft 84 is shown.
  • the bearing plate 82 has for storage of the intermediate shaft 84, a bearing 86 which, viewed in the axial direction, between two drive bearings 88, 90 of the intermediate shaft 84 is arranged.
  • the bearing 86 for supporting the intermediate shaft 84 comprises a bearing inner element 92, which is formed integrally with an inner ring 94 of one of the two drive bearings 90.
  • the inner bearing element 92 has a ball track 96, and the inner ring 94 formed integrally with the inner bearing element 92 of one of the two drive bearings 90, which by means of a press connection with an inner ring 93 of the other of the two drive bearings 88 includes a further ball race 98 of the drive bearing 90.
  • the bearing 86 for supporting the intermediate shaft 84 has a bearing outer element 100 which is releasably connected to an intermediate flange 102 by means of a screw connection.
  • Fig. 5 shows a further embodiment of a bearing plate 104 for supporting an intermediate shaft 106.
  • the bearing plate 104 has for storage of the intermediate shaft 106 a bearing 108 which comprises a combination of a needle bearing 110 and a thrust bearing 112, in which a bearing element 114 of the needle bearing 110 integral with a bearing element 114 of the thrust bearing 112 is formed.
  • the bearing plate 104 is detachably connected to an intermediate flange 116 by means of a screw connection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Earth Drilling (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Rolling Contact Bearings (AREA)
  • Mounting Of Bearings Or Others (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Bohrhammer- und/oder Meißelgerät nach dem Oberbegriff des Anspruchs 1. Ein solches Gerät is aus der EP 0771620 A1 bekannt.The invention relates to a hammer drill and / or chisel device according to the preamble of claim 1. Such a device is from the EP 0771620 A1 known.

Es ist bereits vorgeschlagen worden, einen Lagerschild, der einer Lagerung eines Schlagwerks und einer Zwischenwelle dient, mit einem Getriebegehäuse des Bohr- und/oder Meißelgeräts lösbar zu verbinden.It has already been proposed to releasably connect a bearing plate, which serves to support a percussion mechanism and an intermediate shaft, to a transmission housing of the drilling and / or chiseling device.

Offenbarung der ErfindungDisclosure of the invention

Die Erfindung geht aus von einem Bohrhammer- und/oder Meißelgerät, mit einem Schlagwerk und einer Zwischenwelle, die jeweils im Wesentlichen parallel zu einer axialen Richtung gelagert sind, und mit einem Getriebegehäuse und einem Zwischenflansch. Unter einem "Bohrhammergerät" soll in diesem Zusammenhang insbesondere eine von Hand bedienbare Bohrmaschine mit einem Schlagwerk bekannter Art verstanden werden, bei der eine Schlagenergie des Schlagwerks unabhängig von einer Andruckkraft ist, die von einem Bediener des Bohrhammergeräts ausgeübt wird. Das Schlagwerk wird dabei von einem Antriebskolben, einem vom Anfriebskolben angetriebenen Schläger, einem den Antriebskolben undlöder den Schläger lagernden Schlagwerkrohr und gegebenenfalls von einem Schlagkolben gebildet.The invention relates to a hammer drill and / or chisel device, with a striking mechanism and an intermediate shaft, which are each mounted substantially parallel to an axial direction, and with a transmission housing and an intermediate flange. A "hammer drill" should be understood in this context in particular a hand-operated drill with a percussion known type, in which a striking energy of the percussion is independent of a pressing force exerted by an operator of the hammer drill. The percussion mechanism is formed by a drive piston, a racket driven by the drive piston, a percussion tube supporting the drive piston and the bait and possibly a percussion piston.

Unter einem "Meißelgerät" soll in diesem Zusammenhang insbesondere ein von Hand bedienbarer Meißel- oder Schlaghammer mit einem Schlagwerk der zuvor beschriebenen Art verstanden werden, bei der eine Schlagenergie des Schlagwerks unabhängig von einer Andruckkraft ist, die von einem Bediener des Meißel- oder Schlaghammers ausgeübt wird. Unter einer "axialen Richtung" soll in diesem Zusammenhang insbesondere eine Richtung parallel zu einer Flugrichtung des Schlägers während eines Betriebs des Bohrhammer- und/oder Meißelgeräts verstanden werden.A "chiseling device" is to be understood in this context in particular a hand-operated chisel or percussion hammer with a percussion of the type described above, in which a striking energy of the percussion is independent of a pressing force by an operator of the chisel or Schlaghammer is exercised. In this context, an "axial direction" is to be understood as meaning in particular a direction parallel to a direction of flight of the racket during operation of the hammer drill and / or chisel device.

Es wird vorgeschlagen, dass das Bohr- und/oder Meißelgerät einen Lagerschild umfasst, der mit dem Zwischenflansch lösbar verbunden und dazu vorgesehen ist, die Zwischenwelle und zumindest eine Komponente des Schlagwerks zu lagern, wodurch eine einfache, material- und platzsparende und dadurch kostengünstige Lösung zu einer Fixierung und Lagerung der Zwischenwelle und einer Komponente des Schlagwerks bereitgestellt werden kann. Vorzugsweise kann die im Lagerschild gelagerte Komponente des Schlagwerks ein Hohlkolben sein. Vorteilhaft kann in diesem Fall ein in bekannter Weise zur Führung des Hohlkolbens vorgesehenes Schlagwerkrohr stark verkürzt werden, wodurch Material und Bauraum eingespart werden und eine besonders kostengünstige Lösung bereitgestellt werden kann.It is proposed that the drilling and / or chiseling device comprises a bearing plate, which is releasably connected to the intermediate flange and intended to support the intermediate shaft and at least one component of the percussion mechanism, whereby a simple, material and space-saving and therefore cost-effective solution can be provided for a fixation and storage of the intermediate shaft and a component of the impact mechanism. Preferably, the mounted in the bearing plate component of the impact mechanism may be a hollow piston. Advantageously, in this case, provided in a known manner for guiding the hollow piston percussion tube can be greatly shortened, whereby material and space can be saved and a particularly cost-effective solution can be provided.

Ferner wird vorgeschlagen, dass der Zwischenflansch den Lagerschild in axialer Richtung fixiert. Dadurch kann eine besonders einfache und kostengünstige Fixierung und Lagerung der Zwischenwelle und einer Komponente des Schlagwerks erzielt werden. Grundsätzlich sind auch andere, dem Fachmann geläufige Methoden und Mittel zur Befestigung des Lagerschilds möglich. Vorteilhaft kann das Bohr- und/oder Meißelgerät zumindest eine Schraubverbindung aufweisen, die dazu vorgesehen ist, in zumindest einem Betriebszustand den Lagerschild mit dem Zwischenflansch lösbar zu verbinden. Von besonderem Vorteil ist es, wenn der Lagerschild ein Spannungselement aufweist, das dazu vorgesehen ist, in zumindest einem Betriebszustand eine Klemmung des Lagerschilds zwischen dem Zwischenflansch und dem Getriebegehäuse herzustellen. Vorzugsweise wird die Fixierung des Lagerschilds in axialer Richtung durch eine Klemmung zwischen dem Zwischenflansch und dem Getriebegehäuse erreicht, bei der das Spannungselement mit zumindest einem korrespondierenden Element des Getriebegehäuses und/oder des Zwischenflansches bei einer Montage nach Anwendung einer in axialer Richtung wirkenden Kraft eine in radialer Richtung dauerhaft wirkende Klemmkraft erzeugen. Unter einer "radialen Richtung" soll in diesem Zusammenhang insbesondere eine Richtung verstanden werden, die, ausgehend von der axialen Richtungsachse, auf dieser senkrecht steht. Insbesondere kann das Spannungselement als eine Schrägfläche ausgebildet sein. Dadurch kann auf besonders einfache und Bauteile sparende Weise eine Klemmung und damit Fixierung des Lagerschilds erzielt werden.It is also proposed that the intermediate flange fixes the end shield in the axial direction. This allows a particularly simple and inexpensive fixation and storage of the intermediate shaft and a component of the impact mechanism can be achieved. In principle, other methods familiar to the person skilled in the art and means for fastening the end shield are also possible. Advantageously, the drilling and / or chiseling device can have at least one screw connection, which is intended to detachably connect the end shield to the intermediate flange in at least one operating state. It is particularly advantageous if the end shield has a tension element which is provided to produce a clamping of the end shield between the intermediate flange and the gearbox in at least one operating state. Preferably, the fixation of the bearing plate in the axial direction is achieved by a clamping between the intermediate flange and the gear housing, wherein the tension element with at least one corresponding element of the gear housing and / or the intermediate flange in a mounting after application of a force acting in the axial direction in a radial Create direction permanent acting clamping force. Under a "radial direction" is in this context in particular a direction are understood, which, starting from the axial direction axis, is perpendicular to this. In particular, the tension element may be formed as an inclined surface. This can be achieved in a particularly simple and component-saving way clamping and thus fixing the bearing plate.

In einer vorteilhaften Ausgestaltung weist der Lagerschild zur Lagerung der Zwischenwelle ein Lager mit einem Lageraußenelement auf, das mit dem Zwischenflansch lösbar verbunden ist, wodurch eine material- und platzsparende und dadurch kostengünstige Lösung einer Fixierung und Lagerung der Zwischenwelle erzielt werden kann. Vorzugsweise kann das Lageraußenelement mit dem Zwischenflansch durch zumindest eine Schraube lösbar verbunden sein. Grundsätzlich können aber auch andere, dem Fachmann bekannte Mittel zur Herstellung einer lösbaren Verbindung zwischen dem Lageraußenelement und dem Zwischenflansch eingesetzt werden.In an advantageous embodiment, the bearing plate for supporting the intermediate shaft on a bearing with a bearing outer element, which is detachably connected to the intermediate flange, whereby a material and space-saving and thus cost-effective solution of fixing and supporting the intermediate shaft can be achieved. Preferably, the bearing outer element can be releasably connected to the intermediate flange by at least one screw. In principle, however, other means known to those skilled in the production of a detachable connection between the bearing outer element and the intermediate flange can be used.

Des Weiteren wird vorgeschlagen, dass der Lagerschild zur Lagerung der Zwischenwelle ein Lager mit einem Lagerinnenelement aufweist, das einstückig mit einem Innenring zumindest eines Antriebslagers ausgeformt ist und zumindest eine eingeschliffene Kugellaufbahn aufweist, wodurch das Lager einfach und platzsparend ausgestaltet werden kann. Vorteilhaft können Lagerkugeln mittels der eingeschliffenen Kugellaufbahn während eines Betriebs auftretende Axial-und Radialkräfte aufnehmen. Unter einem "Antriebslager" soll in diesem Zusammenhang insbesondere ein fest oder mit einer dazu vorgesehenen Vorrichtung zuschaltbar mit der Zwischenwelle gekoppeltes Lager verstanden werden, das dazu vorgesehen ist, in zumindest einem Betriebszustand eine Rotationsbewegung der angetriebenen Zwischenwelle in eine Hin- und Herbewegung einer weiteren oder weiterer Komponenten des Bohrhammer- und/oder Meißelgeräts umzuwandeln.Furthermore, it is proposed that the bearing plate for supporting the intermediate shaft has a bearing with a bearing inner element, which is integrally formed with an inner ring of at least one drive bearing and at least one ground ball raceway, whereby the bearing can be configured in a simple and space-saving. Advantageously, bearing balls can absorb axial and radial forces occurring during operation by means of the ground ball raceway. In this context, a "drive bearing" is to be understood as meaning, in particular, a bearing that can be connected to the intermediate shaft in a fixed manner or with a device provided for this purpose, which is intended to rotate the driven intermediate shaft into a reciprocating motion of another or at least one operating state other components of the hammer drill and / or chisel device.

Das Antriebslager ist vorzugsweise zusammen mit einem Taumelantrieb zu einer Umwandlung einer Rotationsbewegung einer Welle, wie beispielsweise einer Zwischenwelle, in eine Hin- und Herbewegung zu einer Erzeugung eines axialen Schlagimpulses vorgesehen.The drive bearing is preferably provided together with a wobble drive for converting a rotational movement of a shaft, such as an intermediate shaft, into a reciprocating motion for generating an axial impact pulse.

In einer weiteren Ausgestaltung umfasst der Lagerschild zur Lagerung der Zwischenwelle ein Lager mit einem von einem Innenring eines Antriebslagers separaten Zwischenstück, das auf einer Außenseite eine innere Kugellaufbahn des Lagers aufweist und auf einer Innenseite mit einem Gleitlager zur Lagerung der Zwischenwelle ausgestattet ist. Dadurch kann das Lager platzsparend und kostengünstig ausgestaltet werden. Mit Vorteil können die Lagerkugeln während eines Betriebs auftretende Kräfte in axialer und radialer Richtung aufnehmen, und die innen liegende Gleitlagerfläche kann vorteilhaft die Zwischenwelle lagern.In a further embodiment, the bearing plate for supporting the intermediate shaft comprises a bearing with a separate from an inner ring of a drive bearing intermediate piece, which has on an outer side an inner ball track of the bearing and is equipped on an inner side with a plain bearing for supporting the intermediate shaft. As a result, the bearing can be designed to save space and cost. Advantageously, the bearing balls can absorb forces occurring during operation in the axial and radial directions, and the inner plain bearing surface can advantageously support the intermediate shaft.

Eine besonders einfache und kompakte Lösung kann bereitgestellt werden, wenn das separate Zwischenstück eine Formschlussverbindung mit zumindest einem Innenring eines Antriebslagers herstellt.A particularly simple and compact solution can be provided if the separate intermediate piece produces a form-locking connection with at least one inner ring of a drive bearing.

Ferner wird vorgeschlagen, dass der Lagerschild zur Lagerung der Zwischenwelle ein Lager umfasst, das ein Lagerinnenelement mit zumindest einer Kugellaufbahn aufweist, das einstückig mit einem Innenring eines ersten Antriebslagers ausgebildet und durch eine Pressverbindung mit einem Innenring eines zweiten Antriebslagers verbunden ist. Dadurch kann eine platzsparende und kostengünstige Lösung einer Fixierung und Lagerung der Zwischenwelle erreicht werden, wobei zudem eine leichte Austauschbarkeit des Innenrings ermöglicht werden kann.It is also proposed that the bearing plate for supporting the intermediate shaft comprises a bearing having a bearing inner element with at least one ball race, which is integrally formed with an inner ring of a first drive bearing and connected by a press connection with an inner ring of a second drive bearing. This allows a space-saving and cost-effective solution of fixing and supporting the intermediate shaft can be achieved, in addition, an easy replacement of the inner ring can be made possible.

In einer weiteren vorteilhaften Ausgestaltung weist der Lagerschild zur Lagerung der Zwischenwelle ein Lager auf, das eine Kombination aus einem Nadellager und einem Axiallager umfasst, bei der ein Element des Nadellagers einstückig mit einem Element des Axiallagers ausgebildet ist. Dadurch kann eine einfache und kostengünstige Lösung einer Fixierung und Lagerung der Zwischenwelle ermöglicht werden. Vorteilhaft kann das Lager unter Vermeidung einer Herstellung einer Kugellaufbahn im Betrieb auftretende Kräfte in axialer Richtung aufnehmen.In a further advantageous embodiment, the bearing plate for supporting the intermediate shaft on a bearing comprising a combination of a needle bearing and a thrust bearing, wherein an element of the needle bearing is integrally formed with an element of the thrust bearing. As a result, a simple and cost-effective solution for fixing and supporting the intermediate shaft can be made possible. Advantageously, the bearing can absorb forces occurring in operation in the axial direction while avoiding production of a ball track during operation.

Zudem wird vorgeschlagen, dass der Lagerschild zur Lagerung der Zwischenwelle ein Lager aufweist, das, in axialer Richtung betrachtet, zwischen zwei Antriebslagern der Zwischenwelle angeordnet ist. Durch die Anordnung des Lagers der Zwischenwelle zwischen zwei Antriebslagern kann eine besonders günstige Kräfteverteilung erzielt werden, wodurch eine besonders einfache und kostengünstige Lagerung der Zwischenwelle erreicht werden kann.In addition, it is proposed that the bearing plate for supporting the intermediate shaft has a bearing which, viewed in the axial direction, is arranged between two drive bearings of the intermediate shaft. By the arrangement of the bearing of the intermediate shaft between two drive bearings, a particularly favorable distribution of forces can be achieved, whereby a particularly simple and inexpensive storage of the intermediate shaft can be 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.Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Es zeigen:

Fig. 1
eine schematische Darstellung eines erfindungsgemäßen Bohrhammer und Meißelgeräts,
Fig. 2
eine Detailansicht eines Getriebegehäuses des Bohrhammer- und Meißelgeräts gemäß der Fig. 1,
Fig. 3
eine Detailansicht einer weiteren Ausgestaltung eines Lagerschilds zur Lagerung einer Zwischenwelle,
Fig. 4
eine Detailansicht einer weiteren Ausgestaltung eines Lagerschilds zur Lagerung einer Zwischenwelle und
Fig. 5
eine Detailansicht einer weiteren Ausgestaltung eines Lagerschilds zur Lagerung einer Zwischenwelle.
Show it:
Fig. 1
a schematic representation of a hammer drill and chisel device according to the invention,
Fig. 2
a detailed view of a transmission housing of the hammer drill and Chiselgerät according to the Fig. 1 .
Fig. 3
a detailed view of another embodiment of a bearing plate for supporting an intermediate shaft,
Fig. 4
a detailed view of another embodiment of a bearing plate for supporting an intermediate shaft and
Fig. 5
a detailed view of another embodiment of a bearing plate for supporting an intermediate shaft.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Fig. 1 zeigt eine schematische Darstellung eines Bohrhammer- und Meißelgeräts mit einem Getriebegehäuse 10, einem Motorgehäuse 12, einem Handgriff 16 und einem Betätigungsschalter 18. An der Übergangsstelle zwischen dem Motorgehäuse 12 und dem Getriebegehäuse 10 ist ein Zwischenflansch 20 angeordnet, der in das Getriebegehäuse 10 ragt. Eine Werkzeugaufnahme 22 ist an einem bohrrichtungsseitigen Ende des Bohrhammer- und Meißelgeräts teilweise in einem Schlagwerkrohr 26 angeordnet. Ein Schlagwerk 24 innerhalb des Getriebegehäuses 10 beinhaltet neben dem Schlagwerkrohr 26 in bekannter Weise einen Schlagbolzen 28, einen im Schlagwerkrohr 26 geführten, als Hohlkolben 32 ausgeführten Antriebskolben und einen in dem Hohlkolben 32 geführten Schläger 30. Der Hohlkolben 32 ist an ein als Taumelgetriebe ausgebildetes Antriebslager 34 angelenkt, das über eine als Zahnwelle ausgebildete Zwischenwelle 36 von einem im Motorgehäuse 12 angeordneten Motor 14 angetrieben wird. Eine axiale Richtung wird durch eine Flugrichtung des Schlägers 30 im Hohlkolben 32 während eines Betriebs des Bohrhammer- und Meißelgeräts festgelegt. Das Schlagwerk 24, der Motor 14 und die Zwischenwelle 36 sind jeweils parallel zu der axialen Richtung gelagert. Radiale Richtungen sind als senkrecht zu der axialen Richtung stehend und von dieser ausgehend definiert. Fig. 1 shows a schematic representation of a hammer drill and Chiselgerät with a gear housing 10, a motor housing 12, a handle 16 and an actuating switch 18. At the transition point between the motor housing 12 and the gear housing 10, an intermediate flange 20 is arranged, which projects into the gear housing 10. A tool holder 22 is partially disposed in a striking mechanism tube 26 at a drilling direction end of the hammer drill and chisel device. A percussion 24 within the gear housing 10 includes in addition to the percussion tube 26 in a known manner a firing pin 28, a guided in percussion tube 26, designed as a hollow piston 32 drive piston and guided in the hollow piston 32 racket 30. The hollow piston 32 is formed on a trained as a wobble drive gear Hinged 34 which is driven by a formed as a toothed shaft intermediate shaft 36 of a motor housing 12 arranged in the engine 14. An axial direction is determined by a direction of flight of the beater 30 in the hollow piston 32 during operation of the hammer drill and chisel device. The striking mechanism 24, the motor 14 and the intermediate shaft 36 are each mounted parallel to the axial direction. Radial directions are defined as perpendicular to and from the axial direction.

In Fig. 2 ist eine Detailansicht des Getriebegehäuses 10 des Bohrhammer- und Meißeigeräts gemäß der Fig. 1 dargestellt. Mit dem Zwischenflansch 20 ist ein Lagerschild 38 lösbar verbunden, der dazu vorgesehen ist, die Zwischenwelle 36 und eine Komponente des Schlagwerks 24, nämlich den Hohlkolben 32, zu lagern. In axialer Richtung ist der Lagerschild 38 durch den Zwischenflansch 20 fixiert. Der Lagerschild 38 weist in axialer Richtung ein Übermaß auf, so dass bei einer Montage nach Einbau des Lagerschilds 38 zwischen dem Zwischenflansch 20 und dem Getriebegehäuse 10 eine Klemmung durch eine permanent wirkende Kraft in axialer Richtung erzeugt wird. Ein als Schrägfläche an einem äußeren Rand des Lagerschilds 38 ausgebildetes Spannungselement 40 ist dazu vorgesehen, in zumindest einem Betriebszustand eine Klemmung des Lagerschilds 38 in radialer Richtung zwischen dem Zwischenflansch 20 und dem Getriebegehäuse 10 herzustellen und wirkt dazu derart mit einem Absatz 42 im Getriebegehäuse 10 und einer Abschlusskante 44 des Zwischenflansches 20 zusammen, dass eine bei der Montage in axialer Richtung wirkende Kraft dauerhaft in axialer und in radialer Richtung wirkende Klemmkräfte erzeugt.In Fig. 2 is a detail view of the gear housing 10 of the hammer drill and Meißeigäts according to the Fig. 1 shown. With the intermediate flange 20, a bearing plate 38 is detachably connected, which is intended to support the intermediate shaft 36 and a component of the striking mechanism 24, namely the hollow piston 32. In the axial direction of the bearing plate 38 is fixed by the intermediate flange 20. The bearing plate 38 has an oversize in the axial direction, so that when mounting the bearing plate 38 between the intermediate flange 20 and the gear housing 10, a clamping by a permanently acting force in the axial direction is generated. A trained as an inclined surface on an outer edge of the bearing plate 38 tension member 40 is provided to produce in at least one operating condition, a clamping of the bearing plate 38 in the radial direction between the intermediate flange 20 and the gear housing 10 and acts to such a paragraph 42 in the gear housing 10 and a closing edge 44 of the intermediate flange 20 together that generates a force acting in the axial direction during assembly permanently acting in the axial and radial direction clamping forces.

Der Lagerschild 38 ist zur Lagerung des Hohlkolbens 32 mit einem Gleitlager 39 ausgestattet. Zur Lagerung der Zwischenwelle 36 weist der Lagerschild 38 ein Lager 46 mit einem Lageraußenelement 48 auf, das in eine Ausnehmung 50 des Lagerschilds 38 eingepasst ist. Ein Lagerinnenelement 52 des Lagers 46 ist einstückig mit einem Innenring 54 des Antriebslagers 34 ausgeformt und weist eine eingeschliffene Kugellaufbahn 56 auf.The bearing plate 38 is equipped with a sliding bearing 39 for mounting the hollow piston 32. For supporting the intermediate shaft 36, the bearing plate 38 has a bearing 46 with a bearing outer element 48, which is fitted into a recess 50 of the bearing plate 38. A bearing inner element 52 of the bearing 46 is formed integrally with an inner ring 54 of the drive bearing 34 and has a ground ball raceway 56.

Im Folgenden werden weitere Ausführungsbeispiele beschrieben, in denen eine Lagerung einer Zwischenwelle 60, 84, 106 variiert wird. Die Lagerung des Hohlkolbens 32 ist identisch zu der in der Fig. 2 dargestellten und oben beschriebenen Weise ausgeführt und wird aus Gründen der Übersichtlichkeit nicht abgebildet.In the following, further embodiments are described in which a bearing of an intermediate shaft 60, 84, 106 is varied. The storage of the hollow piston 32 is identical to that in the Fig. 2 shown and described above and is not shown for reasons of clarity.

Fig. 3 zeigt eine weitere Ausgestaltung eines Lagerschilds 58 zur Lagerung einer Zwischenwelle 60. Der Lagerschild 58 umfasst zur Lagerung der Zwischenwelle 60 ein Lager 62 mit einem von einem Innenring 64 eines Antriebslagers 68 separaten Zwischenstück 72. Auf einer Außenseite weist das Zwischenstück 72 eine innere Kugellaufbahn 74 des Lagers 62 auf. Auf einer Innenseite ist das Zwischenstück 72 mit einem Gleitlager 76 zur Lagerung der Zwischenwelle 60 ausgestattet. In axialer Richtung gesehen sind vor und hinter dem Zwischenstück 72 Innenringe 64, 66 zweier Antriebslager 68, 70 angeordnet, mit denen das Zwischenstück 72 eine Formschlussverbindung bildet. Das Lager 62 zur Lagerung der Zwischenwelle 60 weist ein Lageraußenelement 78 auf, das mit einem Zwischenflansch 80 mittels einer Schraubverbindung lösbar verbunden ist. Fig. 3 shows a further embodiment of a bearing plate 58 for supporting an intermediate shaft 60. The bearing plate 58 comprises for supporting the intermediate shaft 60, a bearing 62 with a separate from an inner ring 64 of a drive bearing 68 intermediate piece 72. On an outer side, the intermediate piece 72 has an inner ball track 74 of the Camp 62 on. On an inner side, the intermediate piece 72 is equipped with a sliding bearing 76 for supporting the intermediate shaft 60. Seen in the axial direction 72 inner rings 64, 66 of two drive bearings 68, 70 are arranged in front of and behind the intermediate piece, with which the intermediate piece 72 forms a positive connection. The bearing 62 for supporting the intermediate shaft 60 has a bearing outer element 78 which is releasably connected to an intermediate flange 80 by means of a screw connection.

In Fig. 4 ist eine weitere Ausgestaltung eines Lagerschilds 82 zur Lagerung einer Zwischenwelle 84 dargestellt. Der Lagerschild 82 weist zur Lagerung der Zwischenwelle 84 ein Lager 86 auf, das, in axialer Richtung betrachtet, zwischen zwei Antriebslagern 88, 90 der Zwischenwelle 84 angeordnet ist. Das Lager 86 zur Lagerung der Zwischenwelle 84 umfasst ein Lagerinnenelement 92, das einstückig mit einem Innenring 94 eines der beiden Antriebslager 90 ausgebildet ist. Das Lagerinnenelement 92 weist eine Kugellaufbahn 96 auf, und der einstückig mit dem Lagerinnenelement 92 ausgebildete Innenring 94 eines der beiden Antriebslager 90, der mittels einer Pressverbindung mit einem Innenring 93 des anderen der beiden Antriebslager 88 verbunden ist, umfasst eine weitere Kugellaufbahn 98 des Antriebslagers 90. Das Lager 86 zur Lagerung der Zwischenwelle 84 weist ein Lageraußenelement 100 auf, das mit einem Zwischenflansch 102 mittels einer Schraubverbindung lösbar verbunden ist.In Fig. 4 a further embodiment of a bearing plate 82 for supporting an intermediate shaft 84 is shown. The bearing plate 82 has for storage of the intermediate shaft 84, a bearing 86 which, viewed in the axial direction, between two drive bearings 88, 90 of the intermediate shaft 84 is arranged. The bearing 86 for supporting the intermediate shaft 84 comprises a bearing inner element 92, which is formed integrally with an inner ring 94 of one of the two drive bearings 90. The inner bearing element 92 has a ball track 96, and the inner ring 94 formed integrally with the inner bearing element 92 of one of the two drive bearings 90, which by means of a press connection with an inner ring 93 of the other of the two drive bearings 88 includes a further ball race 98 of the drive bearing 90. The bearing 86 for supporting the intermediate shaft 84 has a bearing outer element 100 which is releasably connected to an intermediate flange 102 by means of a screw connection.

Fig. 5 zeigt eine weitere Ausgestaltung eines Lagerschilds 104 zur Lagerung einer Zwischenwelle 106. Der Lagerschild 104 weist zur Lagerung der Zwischenwelle 106 ein Lager 108 auf, das eine Kombination aus einem Nadellager 110 und einem Axiallager 112 umfasst, bei der ein Lagerelement 114 des Nadellagers 110 einstückig mit einem Lagerelement 114 des Axiallagers 112 ausgebildet ist. Der Lagerschild 104 ist mit einem Zwischenflansch 116 mittels einer Schraubverbindung lösbar verbunden. Fig. 5 shows a further embodiment of a bearing plate 104 for supporting an intermediate shaft 106. The bearing plate 104 has for storage of the intermediate shaft 106 a bearing 108 which comprises a combination of a needle bearing 110 and a thrust bearing 112, in which a bearing element 114 of the needle bearing 110 integral with a bearing element 114 of the thrust bearing 112 is formed. The bearing plate 104 is detachably connected to an intermediate flange 116 by means of a screw connection.

Claims (10)

  1. Rotary hammer and/or chiselling device having a percussion mechanism (24) and an intermediate shaft (36; 60; 84; 106) which are each mounted substantially parallel to an axial direction, and having a transmission housing (10) and an intermediate flange (20; 80; 102; 116),
    characterized by
    a bearing plate (38; 58; 82; 104) which is releasably connected to the intermediate flange (20; 80; 102; 116) and is intended to mount the intermediate shaft (36; 60; 84; 106) and at least one component of the percussion mechanism (24).
  2. Rotary hammer and/or chiselling device according to Claim 1,
    characterized in that
    the component, mounted in the bearing plate (38; 58; 82; 104), of the percussion mechanism (24) is a hollow piston (32).
  3. Rotary hammer and/or chiselling device according to Claim 1 or 2,
    characterized in that
    the intermediate flange (20; 80; 102; 116) fixes the bearing plate (38; 58; 82; 104) in the axial direction.
  4. Rotary hammer and/or chiselling device according to one of the preceding claims,
    characterized in that,
    in order to mount the intermediate shaft (60; 84), the bearing plate (58; 82) has a bearing (62; 86) having an external bearing element (78; 100) which is releasably connected to the intermediate flange (80; 102).
  5. Rotary hammer and/or chiselling device according to one of the preceding claims,
    characterized in that,
    in order to mount the intermediate shaft (36; 84), the bearing plate (38; 82) has a bearing (46; 86) having an internal bearing element (52; 92) which is formed integrally with an internal ring (54; 94) of at least one drive bearing (34; 88, 90), and has at least one ground-in ball race (56; 96, 98).
  6. Rotary hammer and/or chiselling device according to one of the preceding claims,
    characterized in that,
    in order to mount the intermediate shaft (60), the bearing plate (58) comprises a bearing (62) having an intermediate piece (72) separate from an internal ring (64, 66) of a drive bearing (68, 70), said intermediate piece (72) having, on an outer side, an internal ball race (74) of the bearing (62) and being equipped on an inner side with a plain bearing (76) for mounting the intermediate shaft (60).
  7. Rotary hammer and/or chiselling device at least according to Claim 6,
    characterized in that
    the separate intermediate piece (72) establishes a form-fitting connection with at least one internal ring (64, 66) of a drive bearing (68, 70).
  8. Rotary hammer and/or chiselling device according to one of the preceding claims,
    characterized in that,
    in order to mount the intermediate shaft (84), the bearing plate (82) comprises a bearing (86) which has an internal bearing element (92) with at least one ball race (96, 98) which is formed integrally with an internal ring (94) of a first drive bearing (88, 90) and is connected to an internal ring (93) of a second drive bearing (88, 90) by a press-fit connection.
  9. Rotary hammer and/or chiselling device according to one of the preceding claims,
    characterized in that,
    in order to mount the intermediate shaft (106), the bearing plate (104) has a bearing (108) which comprises a combination of a needle bearing (110) and an axial bearing (112), in which a bearing element (114) of the needle bearing (110) is formed integrally with a bearing element (114) of the axial bearing (112).
  10. Rotary hammer and/or chiselling device according to one of the preceding claims,
    characterized in that,
    in order to mount the intermediate shaft (60; 84), the bearing plate (58; 82) has a bearing (62; 86) which, as seen in the axial direction, is arranged between two drive bearings (68, 70; 88, 90) of the intermediate shaft (60; 84).
EP10724336.2A 2009-07-09 2010-05-10 Drill- and/or percussion apparatus Active EP2451615B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910027560 DE102009027560A1 (en) 2009-07-09 2009-07-09 Hammer drill and / or chisel device
PCT/EP2010/056320 WO2011003646A1 (en) 2009-07-09 2010-05-10 Hammer-drilling and/or cutting device

Publications (2)

Publication Number Publication Date
EP2451615A1 EP2451615A1 (en) 2012-05-16
EP2451615B1 true EP2451615B1 (en) 2015-09-16

Family

ID=42586095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10724336.2A Active EP2451615B1 (en) 2009-07-09 2010-05-10 Drill- and/or percussion apparatus

Country Status (5)

Country Link
EP (1) EP2451615B1 (en)
CN (1) CN102470523B (en)
DE (1) DE102009027560A1 (en)
RU (1) RU2538466C2 (en)
WO (1) WO2011003646A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008041889A1 (en) * 2008-09-09 2010-03-11 Robert Bosch Gmbh Machine tool and manufacturing method for a machine tool
DE102014101827A1 (en) 2014-02-13 2015-08-13 C. & E. Fein Gmbh Drilling machine and drilling tool for this
CN214723942U (en) * 2019-12-09 2021-11-16 苏州宝时得电动工具有限公司 Electric hammer

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1066884B (en) * 1976-08-09 1985-03-12 Star Utensili Elett DRILL OF THE PERCUSSION TYPE
DE3731244A1 (en) * 1987-09-17 1989-03-30 Bosch Gmbh Robert Hand-held power tool
DE3931329C1 (en) * 1989-05-31 1990-06-28 Robert Bosch Gmbh, 7000 Stuttgart, De
RU2064403C1 (en) * 1993-04-15 1996-07-27 Юрий Никитович Колган Rotary - shock machine
DE19540391A1 (en) * 1995-10-30 1997-05-07 Hilti Ag Drilling and chiseling device
RU2117572C1 (en) * 1996-07-25 1998-08-20 Товарищество с ограниченной ответственностью "Внедренческое предприятие "Электрическая импульсная техника и технология" Rotary-percussion action electric machine
GB0125749D0 (en) * 2001-10-26 2001-12-19 Black & Decker Inc Power tool
DE10312981A1 (en) * 2003-03-24 2004-10-07 Robert Bosch Gmbh Electric hand tool
CN1532015A (en) * 2003-03-25 2004-09-29 罗伯特・博施有限公司 Electric tool
JP2005040880A (en) * 2003-07-25 2005-02-17 Hitachi Koki Co Ltd Hammering tool and idling prevention mechanism for the tool
DE102005047353A1 (en) * 2005-10-04 2007-04-05 Robert Bosch Gmbh Electric-powered machine tool e.g. hand-operated power drill, for use in pistol construction, has flange to drive train and divided into drive end and gear end bearing bracket units connected with each other by vibration damping unit
JP4756474B2 (en) * 2006-07-20 2011-08-24 日立工機株式会社 Electric tool
CN1899772A (en) * 2006-07-25 2007-01-24 常州赛迪电气制造有限公司 Multifunctional electric hammer
DE102007010177A1 (en) * 2007-03-02 2008-09-04 Robert Bosch Gmbh Hand-held electric drill or hammer drill has an intermediate drive shaft radially supported by functional unit
DE102008000677A1 (en) * 2008-03-14 2009-09-17 Robert Bosch Gmbh Hand tool for impact driven tools

Also Published As

Publication number Publication date
RU2538466C2 (en) 2015-01-10
EP2451615A1 (en) 2012-05-16
WO2011003646A1 (en) 2011-01-13
CN102470523B (en) 2015-09-09
RU2012103933A (en) 2013-08-20
DE102009027560A1 (en) 2011-01-13
CN102470523A (en) 2012-05-23

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