EP2331299B1 - Hand-held power tool comprising a spindle for receiving a tool - Google Patents

Hand-held power tool comprising a spindle for receiving a tool Download PDF

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Publication number
EP2331299B1
EP2331299B1 EP09781744.9A EP09781744A EP2331299B1 EP 2331299 B1 EP2331299 B1 EP 2331299B1 EP 09781744 A EP09781744 A EP 09781744A EP 2331299 B1 EP2331299 B1 EP 2331299B1
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EP
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Prior art keywords
bearing
hand
held power
spindle
power tool
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EP09781744.9A
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German (de)
French (fr)
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EP2331299A1 (en
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Heiko Roehm
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Robert Bosch GmbH
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Robert Bosch GmbH
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Priority to EP15201826.3A priority Critical patent/EP3040166A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • 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

Definitions

  • the invention relates to a hand tool, in particular an electrically operated hand tool such as a cordless screwdriver or a cordless drill, with a spindle for receiving a tool according to the preamble of claim 1.
  • the electric drive motor drives a spindle for receiving a tool via a multi-stage planetary gear.
  • the spindle is rotatably mounted on a tool-side bearing and axially spaced therefrom via a motor-side bearing, wherein the tool-side bearing is usually designed as a fixed bearing and the motor-side bearing as floating bearing.
  • the motor-side movable bearing is located axially between the frontal region of the spindle, where it is coupled to a component of the planetary gear, and the tool-side fixed bearing.
  • the bearing points for supporting the spindle have the greatest possible distance from each other.
  • the bearing distance as short as possible or to choose only one bearing, but at the cost of concentricity and mechanical rigidity.
  • WO 2009/024165 A1 discloses that for a secure radial bearing of the output shaft of the output side planetary carrier is radially mounted by means of a rolling bearing, wherein the rolling bearing between the gear housing and the output side planet carrier is arranged.
  • the bearing of the drive-side end of the output shaft is effected slidably in the output-side planet carrier, which has an inner bore for this purpose, which receives the output shaft 44.
  • the invention is based on the object with simple constructive measures a hand tool such as a cordless screwdriver with a short overall length, at the same time a high concentricity of the tool receiving spindle should be given.
  • the hand tool of the invention which is in particular an electrically operated hand tool such as a cordless screwdriver, a cordless drill, a cordless hammer drill or a cordless drill is equipped with a transmission in the drive train between the drive motor of Hand tool and a spindle for receiving a tool is arranged.
  • a transmission is a reduction of the high input speed of the motor to the desired lower speed of the spindle instead.
  • the spindle is mounted on a tool-side bearing and a motor-side bearing, wherein the motor-side bearing is radially supported on a rotating in the same direction component of the transmission.
  • the overall length can be reduced since a component of the transmission directly participates in the support of the motor-side bearing, so that the motor-side bearing is guided axially into the region of the transmission or the transmission extends axially up to this bearing.
  • the transmission component, on which the bearing is supported radially can optionally be used to drive the spindle. This way will Achieved a particularly compact design in the axial direction.
  • a relatively long bearing distance can be realized, in particular in the advantageous embodiment, that the engine-side bearing is adjacent to the transmission facing end face of the spindle.
  • the relatively large bearing distance results in a high concentricity quality.
  • the power loss of the bearing is reduced by the fact that the motor-side bearing the spindle is not supported on the stationary gear housing, but on the rotating planet carrier.
  • the transmission is designed as a planetary gear, which preferably has two or more stages for the reduction of the drive speed of the electric drive motor to the spindle speed.
  • the motor-side bearing is supported radially on a transmission part of the planetary gear, in particular on a planet carrier, wherein dispensed with an axial support on the transmission component, so that in this case the engine-side bearing is suitably axially fixedly connected to the spindle.
  • an axial support is additionally allowed at least in one axial direction.
  • an axial support in both axial directions of the spindle via the respective transmission component comes into consideration.
  • the engine-side bearing can be supported radially in multi-stage planetary gears, for example, by a planetary carrier near the motor or the central planet carrier.
  • a planetary carrier near the motor or the central planet carrier.
  • the engine-side bearing is preferably designed as a movable bearing with axial movement possibility, whereas the tool-side bearing is suitably designed as a fixed bearing with axial locking relative to the housing of the power tool.
  • the motor-side floating bearing as already mentioned above, be axially fixed to the planet carrier and be mounted axially movable on the spindle. Also possible is an embodiment in which the movable bearing is fixed axially on the spindle and is held axially movable in the planet carrier.
  • both bearings are designed as floating bearing or both bearings as a fixed bearing or the tool-side bearing as a floating bearing and the motor-side bearing as a fixed bearing.
  • the bearings can be designed either as a rolling bearing or as a sliding bearing, wherein, if appropriate, a mixed design is also considered, in which a bearing is designed as a rolling bearing and a bearing as a sliding bearing.
  • a spindle lock for centering the spindle, which is arranged axially between the tool-side bearing and the bearing on the motor side.
  • the spindle lock comprises Spindellockwalzen for centering the spindle, which are expediently arranged axially between the fixed and floating bearings of the spindle.
  • the hand tool 1 has an electric drive motor 2 shown only schematically, the motor shaft is coupled to a planetary gear 4, which is arranged in a transmission housing 3 of the power tool.
  • the planetary gear 4 sets the rotational movement of the drive motor 2 with a reduction to a coaxial in the transmission housing mounted spindle 5 um, the free end face is equipped with an external thread 8 for fixing a chuck, in which a tool can be clamped.
  • the spindle 5 is rotatably supported in the gear housing 3 via a tool-side, the free end side adjacent bearing 6 and a motor-side, the planetary gear 4 facing bearing 7.
  • the transmission housing 3 is partially enveloped by a motor housing, not shown, which receives the drive motor 2.
  • the gear housing 3 has an inner, hollow-cylindrical bearing dome 10 for receiving the spindle 5.
  • the spindle 5 has a radially expanded, annular circumferential support collar 11, which adjoins the radial inner side of the bearing dome 10 adjacent to the end face of the bearing dome.
  • the tool-side bearing 6 is arranged on the axially inside, the drive motor side facing, which is supported in the axial direction - to the free end face of the spindle 5 - on the support collar 11. Radially outward, the tool-side bearing 6 is supported on the inner shell of the bearing dome 10 from.
  • the planetary gear 4 has at least one planet carrier 12, the carrier of planet gears 13 is.
  • the planet carrier 12 encloses the spindle 5 in the region of its end face facing the drive motor.
  • the motor-side bearing 7, which is located immediately adjacent to the end face of the spindle 5, is also encompassed radially by the planet carrier 12; The bearing 7 is supported radially outward against the planet carrier 12.
  • a spindle lock 14 is provided, which is arranged axially between the two bearings 6 and 7 and spindle rollers 15 which abut directly on the spindle and fix them in the desired centric position.
  • the Spindellock 14 partially surrounds the planet carrier 12th
  • the bearings 6 and 7 can each be designed as floating bearings or as a fixed bearing, wherein in a preferred embodiment, the tool-side bearing 6 is designed as a fixed bearing and the motor-side bearing 7 as a floating bearing, which allows an axial Relativverstell mecanickeit between spindle 5 and planet carrier 12.
  • the bearings 6 and 7 are preferably designed as antifriction bearings, wherein, if appropriate, also a design as a sliding bearing is considered.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Portable Power Tools In General (AREA)
  • Retarders (AREA)

Description

Die Erfindung bezieht sich auf eine Handwerkzeugmaschine, insbesondere eine elektrisch betriebene Handwerkzeugmaschine wie beispielsweise ein Akku-Schrauber oder ein Akku-Bohrer, mit einer Spindel zur Aufnahme eines Werkzeugs nach dem Oberbegriff des Anspruches 1.The invention relates to a hand tool, in particular an electrically operated hand tool such as a cordless screwdriver or a cordless drill, with a spindle for receiving a tool according to the preamble of claim 1.

Stand der TechnikState of the art

In der 10 2004 058 809 A1 wird eine als Akku-Schrauber ausgestaltete Handwerkzeugmaschine beschrieben, deren elektrischer Antriebsmotor über ein mehrstufiges Planetengetriebe eine Spindel zur Aufnahme eines Werkzeugs antreibt. Die Spindel ist über ein werkzeugseitiges Lager und axial hierzu beabstandet über ein motorseitiges Lager drehbar gelagert, wobei das werkzeugseitige Lager üblicherweise als Festlager und das motorseitige Lager als Loslager ausgeführt ist. Das motorseitige Loslager liegt axial zwischen dem stirnseitigen Bereich der Spindel, an dem diese mit einem Bauteil des Planetengetriebes gekoppelt ist, und dem werkzeugseitigen Festlager.In the 10 2004 058 809 A1 a designed as a cordless screwdriver hand tool is described, the electric drive motor drives a spindle for receiving a tool via a multi-stage planetary gear. The spindle is rotatably mounted on a tool-side bearing and axially spaced therefrom via a motor-side bearing, wherein the tool-side bearing is usually designed as a fixed bearing and the motor-side bearing as floating bearing. The motor-side movable bearing is located axially between the frontal region of the spindle, where it is coupled to a component of the planetary gear, and the tool-side fixed bearing.

Um einen geringen Rundlauffehler des Werkzeuges zu erzielen, ist es vorteilhaft, wenn die Lagerstellen zur Lagerung der Spindel einen möglichst großen Abstand zueinander aufweisen. Andererseits ist man jedoch zur Erzielung kurzer Baulängen des Antriebsstranges bestrebt, den Lagerabstand möglichst kurz zu halten oder nur ein Lager zu wählen, was jedoch auf Kosten der Rundlaufqualität und der mechanischen Steifigkeit geht.In order to achieve a low concentricity error of the tool, it is advantageous if the bearing points for supporting the spindle have the greatest possible distance from each other. On the other hand, one strives to achieve short overall lengths of the drive train, the bearing distance as short as possible or to choose only one bearing, but at the cost of concentricity and mechanical rigidity.

In EP 2 095 909 A1 ist beschrieben, dass der Planetenträger der vierten Getriebestufe das antriebsseitige Ende der Abtriebswelle aufnimmt und der Planetenträger der vierten Getriebestufe im Getriebegehäuse radial gelagert ist.In EP 2 095 909 A1 is described that the planet carrier of the fourth gear stage receives the drive-side end of the output shaft and the planet carrier of the fourth gear stage is radially mounted in the gear housing.

WO 2009/024165 A1 offenbart, dass für eine sichere radiale Lagerung der Abtriebswelle der abtriebsseitige Planetenträger mittels eines Wälzlagers radial gelagert ist, wobei das Wälzlager zwischen dem Getriebegehäuse und dem abtriebsseitigen Planetenträger angeordnet ist. Die Lagerung des antriebsseitigen Endes der Abtriebswelle erfolgt dabei gleitend im abtriebsseitigen Planetenträger, der hierzu eine Innenbohrung aufweist, die die Abtriebswelle 44 aufnimmt. WO 2009/024165 A1 discloses that for a secure radial bearing of the output shaft of the output side planetary carrier is radially mounted by means of a rolling bearing, wherein the rolling bearing between the gear housing and the output side planet carrier is arranged. The bearing of the drive-side end of the output shaft is effected slidably in the output-side planet carrier, which has an inner bore for this purpose, which receives the output shaft 44.

Offenbarung der ErfindungDisclosure of the invention

Der Erfindung liegt die Aufgabe zugrunde, mit einfachen konstruktiven Maßnahmen eine Handwerkzeugmaschine wie beispielsweise einen Akku-Schrauber mit kurzer Baulänge auszubilden, wobei zugleich eine hohe Rundlaufqualität der das Werkzeug aufnehmenden Spindel gegeben sein soll.The invention is based on the object with simple constructive measures a hand tool such as a cordless screwdriver with a short overall length, at the same time a high concentricity of the tool receiving spindle should be given.

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

Die erfindungsgemäße Handwerkzeugmaschine, bei der es sich insbesondere um eine elektrisch betriebene Handwerkzeugmaschine wie beispielsweise einen Akku-Schrauber, einen Akku-Bohrschrauber, eine Akku-Schlagbohrmaschine oder einen Akku-Bohrer handelt, ist mit einem Getriebe ausgestattet, das im Antriebsstrang zwischen dem Antriebsmotor der Handwerkzeugmaschine und einer Spindel zur Aufnahme eines Werkzeuges angeordnet ist. Über das Getriebe findet eine Untersetzung der hohen Antriebsdrehzahl des Motors auf die gewünschte geringere Drehzahl der Spindel statt. Die Spindel ist über ein werkzeugseitiges Lager und ein motorseitiges Lager gelagert, wobei das motorseitige Lager sich radial an einem sich in gleicher Richtung drehenden Bauteil des Getriebes abstützt.The hand tool of the invention, which is in particular an electrically operated hand tool such as a cordless screwdriver, a cordless drill, a cordless hammer drill or a cordless drill is equipped with a transmission in the drive train between the drive motor of Hand tool and a spindle for receiving a tool is arranged. About the transmission is a reduction of the high input speed of the motor to the desired lower speed of the spindle instead. The spindle is mounted on a tool-side bearing and a motor-side bearing, wherein the motor-side bearing is radially supported on a rotating in the same direction component of the transmission.

Diese Ausführung weist verschiedene Vorteile auf. Es kann insbesondere die Baulänge reduziert werden, da ein Bauteil des Getriebes unmittelbar an der Abstützung des motorseitigen Lagers teilnimmt, so dass das motorseitige Lager axial bis in den Bereich des Getriebes hineingeführt ist bzw. das Getriebe sich axial bis zu diesem Lager erstreckt. Das Getriebebauteil, an dem sich das Lager radial abstützt, kann gegebenenfalls dazu verwendet werden, die Spindel anzutreiben. Auf diese Weise wird eine in Achsrichtung besonders kompakte Ausführung erreicht. Zugleich ist ein verhältnismäßig langer Lagerabstand realisierbar, insbesondere in der vorteilhaften Ausführung, dass sich das motorseitige Lager benachbart zu der dem Getriebe zugewandten Stirnseite der Spindel befindet. Der verhältnismäßig große Lagerabstand hat eine hohe Rundlaufqualität zur Folge. Außerdem ist die Verlustleistung des Lagers dadurch reduziert, dass das motorseitige Lager die Spindel nicht an dem ruhenden Getriebegehäuse abstützt, sondern an dem sich drehenden Planetenträger.This embodiment has several advantages. In particular, the overall length can be reduced since a component of the transmission directly participates in the support of the motor-side bearing, so that the motor-side bearing is guided axially into the region of the transmission or the transmission extends axially up to this bearing. The transmission component, on which the bearing is supported radially, can optionally be used to drive the spindle. This way will Achieved a particularly compact design in the axial direction. At the same time a relatively long bearing distance can be realized, in particular in the advantageous embodiment, that the engine-side bearing is adjacent to the transmission facing end face of the spindle. The relatively large bearing distance results in a high concentricity quality. In addition, the power loss of the bearing is reduced by the fact that the motor-side bearing the spindle is not supported on the stationary gear housing, but on the rotating planet carrier.

Die genannten Vorteile können kostenneutral erreicht werden. Es sind keine zusätzlichen Bauteile für die Realisierung der erfindungsgemäßen Lagerung der Spindel in der Handwerkzeugmaschine erforderlich.The advantages mentioned can be achieved cost-neutral. There are no additional components for the realization of the inventive storage of the spindle in the power tool required.

Gemäß einer zweckmäßigen Ausführung ist das Getriebe als Planetengetriebe ausgebildet, welches vorzugsweise zwei oder mehr Stufen zur Untersetzung der Antriebsdrehzahl des elektrischen Antriebsmotors auf die Spindeldrehzahl aufweist. Das motorseitige Lager stützt sich radial an einem Getriebeteil des Planetengetriebes ab, insbesondere an einem Planetenträger, wobei auf eine axiale Abstützung an dem Getriebebauteil verzichtet wird, so dass in diesem Fall das motorseitige Lager zweckmäßigerweise axial fest mit der Spindel verbunden ist. Gegebenenfalls ist zusätzlich eine axiale Abstützung zumindest in einer Achsrichtung erlaubt. Gegebenenfalls kommt auch eine axiale Abstützung in beide Achsrichtungen der Spindel über das betreffende Getriebebauteil in Betracht.According to an expedient embodiment, the transmission is designed as a planetary gear, which preferably has two or more stages for the reduction of the drive speed of the electric drive motor to the spindle speed. The motor-side bearing is supported radially on a transmission part of the planetary gear, in particular on a planet carrier, wherein dispensed with an axial support on the transmission component, so that in this case the engine-side bearing is suitably axially fixedly connected to the spindle. Optionally, an axial support is additionally allowed at least in one axial direction. Optionally, an axial support in both axial directions of the spindle via the respective transmission component comes into consideration.

Das motorseitige Lager kann bei mehrstufigen Planetengetrieben beispielsweise von einem motornahen Planetenträger oder dem mittleren Planetenträger radial abgestützt werden. Darüber hinaus ist es auch möglich, das motorseitige Lager im Ritzel der werkzeugseitigen Planetenstufe oder dem Ritzel der mittleren Planetenstufe radial abzustützen.The engine-side bearing can be supported radially in multi-stage planetary gears, for example, by a planetary carrier near the motor or the central planet carrier. In addition, it is also possible to radially support the motor-side bearing in the pinion of the tool-side planetary stage or the pinion of the middle planetary stage.

Das motorseitige Lager ist bevorzugt als Loslager mit axialer Bewegungsmöglichkeit ausgeführt, wohingegen das werkzeugseitige Lager zweckmäßigerweise als Festlager mit axialer Arretierung gegenüber dem Gehäuse der Handwerkzeugmaschine ausgebildet ist. Das motorseitige Loslager kann, wie bereits vorstehend erwähnt, axial am Planetenträger fixiert sein und axial beweglich auf der Spindel gelagert sein. Möglich ist auch eine Ausführung, bei der das Loslager axial auf der Spindel fixiert und axial im Planetenträger beweglich gehalten ist.The engine-side bearing is preferably designed as a movable bearing with axial movement possibility, whereas the tool-side bearing is suitably designed as a fixed bearing with axial locking relative to the housing of the power tool. The motor-side floating bearing, as already mentioned above, be axially fixed to the planet carrier and be mounted axially movable on the spindle. Also possible is an embodiment in which the movable bearing is fixed axially on the spindle and is held axially movable in the planet carrier.

Es kommen auch Ausführungen in Betracht, bei denen beide Lager als Loslager oder beide Lager als Festlager oder das werkzeugseitige Lager als Loslager und das motorseitige Lager als Festlager ausgeführt sind. Die Lager können entweder als Wälzlager oder als Gleitlager ausgeführt sein, wobei gegebenenfalls auch eine gemischte Ausführung in Betracht kommt, bei der ein Lager als Wälzlager und ein Lager als Gleitlager ausgebildet ist.There are also versions into consideration, in which both bearings are designed as floating bearing or both bearings as a fixed bearing or the tool-side bearing as a floating bearing and the motor-side bearing as a fixed bearing. The bearings can be designed either as a rolling bearing or as a sliding bearing, wherein, if appropriate, a mixed design is also considered, in which a bearing is designed as a rolling bearing and a bearing as a sliding bearing.

Erfindungsgemäß ist ein Spindellock zur Zentrierung der Spindel vorgesehen, der axial zwischen dem werkzeugseitigen Lager und dem motorseitigen Lager angeordnet ist. Der Spindellock umfasst Spindellockwalzen zur Zentrierung der Spindel, die zweckmäßigerweise axial zwischen Fest- und Loslager der Spindel angeordnet sind.According to the invention, a spindle lock is provided for centering the spindle, which is arranged axially between the tool-side bearing and the bearing on the motor side. The spindle lock comprises Spindellockwalzen for centering the spindle, which are expediently arranged axially between the fixed and floating bearings of the spindle.

Weitere Vorteile und zweckmäßige Ausführungen sind den weiteren Ansprüchen, der Figurenbeschreibung und der Zeichnung zu entnehmen, in der eine Handwerkzeugmaschine im Bereich eines Planetengetriebes und einer Spindel im Schnitt dargestellt ist.Further advantages and expedient embodiments can be found in the further claims, the description of the figures and the drawing, in which a hand tool in the region of a planetary gear and a spindle is shown in section.

Die Handwerkzeugmaschine 1 weist einen nur schematisch dargestellten elektrischen Antriebsmotor 2 auf, dessen Motorwelle mit einem Planetengetriebe 4 gekoppelt ist, das in einem Getriebegehäuse 3 der Handwerkzeugmaschine angeordnet ist. Das Planetengetriebe 4 setzt die Drehbewegung des Antriebsmotors 2 mit einer Untersetzung auf eine koaxial im Getriebegehäuse
gelagerte Spindel 5 um, deren freien Stirnseite mit einem Außengewinde 8 zur Befestigung eines Bohrfutters ausgestattet ist, in das ein Werkzeug eingespannt werden kann. Die Spindel 5 ist über ein werkzeugseitiges, der freien Stirnseite benachbartes Lager 6 sowie ein motorseitiges, dem Planetengetriebe 4 zugewandtes Lager 7 drehbar im Getriebegehäuse 3 gelagert. Das Getriebegehäuse 3 ist teilweise von einem nicht dargestellten Motorgehäuse umhüllt, das den Antriebsmotor 2 aufnimmt.The hand tool 1 has an electric drive motor 2 shown only schematically, the motor shaft is coupled to a planetary gear 4, which is arranged in a transmission housing 3 of the power tool. The planetary gear 4 sets the rotational movement of the drive motor 2 with a reduction to a coaxial in the transmission housing
mounted spindle 5 um, the free end face is equipped with an external thread 8 for fixing a chuck, in which a tool can be clamped. The spindle 5 is rotatably supported in the gear housing 3 via a tool-side, the free end side adjacent bearing 6 and a motor-side, the planetary gear 4 facing bearing 7. The transmission housing 3 is partially enveloped by a motor housing, not shown, which receives the drive motor 2.

Das Getriebegehäuse 3 weist einen innen liegenden, hohlzylindrischen Lagerdom 10 zur Aufnahme der Spindel 5 auf. Die Spindel 5 besitzt einen radial erweiterten, ringförmig umlaufenden Stützkragen 11, der sich an die radialen Innenseite des Lagerdoms 10 benachbart zur Stirnseite des Lagerdoms anschließt. Am Stützkragen 11 ist auf der axial innen liegenden, dem Antriebsmotor zugewandten Seite das werkzeugseitige Lager 6 angeordnet, das sich in Achsrichtung - zur freien Stirnseite der Spindel 5 hin - an dem Stützkragen 11 abstützt. Radial nach außen stützt sich das werkzeugseitige Lager 6 an dem Innenmantel des Lagerdoms 10 ab.The gear housing 3 has an inner, hollow-cylindrical bearing dome 10 for receiving the spindle 5. The spindle 5 has a radially expanded, annular circumferential support collar 11, which adjoins the radial inner side of the bearing dome 10 adjacent to the end face of the bearing dome. On the support collar 11, the tool-side bearing 6 is arranged on the axially inside, the drive motor side facing, which is supported in the axial direction - to the free end face of the spindle 5 - on the support collar 11. Radially outward, the tool-side bearing 6 is supported on the inner shell of the bearing dome 10 from.

Das Planetengetriebe 4 weist mindestens einen Planetenträger 12 auf, der Träger von Planetenrädern 13 ist. Der Planetenträger 12 umschließt die Spindel 5 im Bereich ihrer dem Antriebsmotor zugewandten Stirnseite. Das motorseitige Lager 7, welches sich unmittelbar benachbart zur Stirnseite der Spindel 5 befindet, wird ebenfalls von dem Planetenträger 12 radial umgriffen; das Lager 7 stützt sich radial nach außen gegen den Planetenträger 12 ab.The planetary gear 4 has at least one planet carrier 12, the carrier of planet gears 13 is. The planet carrier 12 encloses the spindle 5 in the region of its end face facing the drive motor. The motor-side bearing 7, which is located immediately adjacent to the end face of the spindle 5, is also encompassed radially by the planet carrier 12; The bearing 7 is supported radially outward against the planet carrier 12.

Zur Zentrierung der Spindel 5 bei ausgeschaltetem Antriebsmotor 2 ist ein Spindellock 14 vorgesehen, der axial zwischen den beiden Lagern 6 und 7 angeordnet ist und Spindelwalzen 15 umfasst, die unmittelbar an der Spindel anliegen und diese in der gewünschten zentrischen Lage fixieren. Der Spindellock 14 umgreift teilweise den Planetenträger 12.For centering the spindle 5 when the drive motor 2 is turned off a spindle lock 14 is provided, which is arranged axially between the two bearings 6 and 7 and spindle rollers 15 which abut directly on the spindle and fix them in the desired centric position. The Spindellock 14 partially surrounds the planet carrier 12th

Die Lager 6 und 7 können jeweils als Loslager oder als Festlager ausgeführt sein, wobei in bevorzugter Ausführung das werkzeugseitige Lager 6 als Festlager und das motorseitige Lager 7 als Loslager ausgeführt ist, welches eine axiale Relativverstellmöglichkeit zwischen Spindel 5 und Planetenträger 12 erlaubt. Die Lager 6 und 7 sind bevorzugt als Wälzlager ausgebildet, wobei gegebenenfalls auch eine Ausführung als Gleitlager in Betracht kommt.The bearings 6 and 7 can each be designed as floating bearings or as a fixed bearing, wherein in a preferred embodiment, the tool-side bearing 6 is designed as a fixed bearing and the motor-side bearing 7 as a floating bearing, which allows an axial Relativverstellmöglichkeit between spindle 5 and planet carrier 12. The bearings 6 and 7 are preferably designed as antifriction bearings, wherein, if appropriate, also a design as a sliding bearing is considered.

Claims (13)

  1. Hand-held power tool, in particular electrically operated hand-held power tool (1), such as, for example, a cordless screwdriver or cordless drill, with a gearing which is coupled to a spindle (5) for receiving a tool, wherein the spindle (5) is mounted via a tool-side bearing (6) and a motor-side bearing (7), and the motor-side bearing (7) is supported radially on a component (12) of the gearing (4), which component rotates in the same direction, characterized in that a spindle lock (14) is provided for centring the spindle (5), wherein the spindle lock rollers (15) of the spindle lock (14) are arranged axially between the tool-side bearing (6) and the motor-side bearing (7) and bear directly against the spindle (5).
  2. Hand-held power tool according to Claim 1, characterized in that the motor-side bearing (7) is supported axially on the component (12) of the gearing (4).
  3. Hand-held power tool according to either of Claims 1 and 2, characterized in that the gearing is designed as a planetary gearing (4).
  4. Hand-held power tool according to Claim 3, characterized in that the motor-side bearing (7) is supported radially outwards on a component (12) of the planetary gearing (4), which component rotates in the same direction.
  5. Hand-held power tool according to Claim 3, characterized in that the motor-side bearing (7) is supported radially outwards on a planet carrier (12) of the planetary gearing (4).
  6. Hand-held power tool according to Claim 5, characterized in that the motor-side bearing (7) is engaged around radially by the planet carrier (12).
  7. Hand-held power tool according to one of Claims 3 to 6, characterized in that the planetary gearing (4) is formed with at least two stages.
  8. Hand-held power tool according to one of the preceding claims, characterized in that the motor-side bearing (7) is formed as a movable bearing with an axial movement possibility.
  9. Hand-held power tool according to one of the preceding claims, characterized in that the tool-side bearing (6) is formed as a fixed bearing with axial locking in relation to the housing (3) of the hand-held power tool (1).
  10. Hand-held power tool according to one of the preceding claims, characterized in that the spindle lock (14) partially engages around the planet carrier (12).
  11. Hand-held power tool according to one of the preceding claims, characterized in that the motor-side bearing (7) is arranged adjacent to the end side of the spindle (5).
  12. Hand-held power tool according to one of the preceding claims, characterized in that at least one bearing (6, 7) is formed as a rolling bearing.
  13. Hand-held power tool according to one of the preceding claims, characterized in that at least one bearing (6, 7) is formed as a plain bearing.
EP09781744.9A 2008-09-29 2009-08-12 Hand-held power tool comprising a spindle for receiving a tool Active EP2331299B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15201826.3A EP3040166A1 (en) 2008-09-29 2009-08-12 Hand-held power tool comprising a spindle for receiving a tool

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810042423 DE102008042423A1 (en) 2008-09-29 2008-09-29 Hand tool with a spindle for holding a tool
PCT/EP2009/060429 WO2010034565A1 (en) 2008-09-29 2009-08-12 Hand-held power tool comprising a spindle for receiving a tool

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP15201826.3A Division EP3040166A1 (en) 2008-09-29 2009-08-12 Hand-held power tool comprising a spindle for receiving a tool
EP15201826.3A Division-Into EP3040166A1 (en) 2008-09-29 2009-08-12 Hand-held power tool comprising a spindle for receiving a tool

Publications (2)

Publication Number Publication Date
EP2331299A1 EP2331299A1 (en) 2011-06-15
EP2331299B1 true EP2331299B1 (en) 2016-07-20

Family

ID=41226241

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09781744.9A Active EP2331299B1 (en) 2008-09-29 2009-08-12 Hand-held power tool comprising a spindle for receiving a tool
EP15201826.3A Withdrawn EP3040166A1 (en) 2008-09-29 2009-08-12 Hand-held power tool comprising a spindle for receiving a tool

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP15201826.3A Withdrawn EP3040166A1 (en) 2008-09-29 2009-08-12 Hand-held power tool comprising a spindle for receiving a tool

Country Status (5)

Country Link
US (1) US8955617B2 (en)
EP (2) EP2331299B1 (en)
CN (1) CN102164715B (en)
DE (1) DE102008042423A1 (en)
WO (1) WO2010034565A1 (en)

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DE102011005553A1 (en) * 2010-10-15 2012-04-19 Robert Bosch Gmbh Hand-held power tool with a Spindellockvorrichtung
US9233461B2 (en) 2012-02-27 2016-01-12 Black & Decker Inc. Tool having multi-speed compound planetary transmission
US9108312B2 (en) * 2012-09-11 2015-08-18 Milwaukee Electric Tool Corporation Multi-stage transmission for a power tool
JP2014079874A (en) * 2012-09-26 2014-05-08 Makita Corp Power tool
DE102013212196A1 (en) 2013-06-26 2014-12-31 Robert Bosch Gmbh Hand tool with a spindle locking device
US20170276214A1 (en) * 2016-03-25 2017-09-28 Jerry M. Cockrell Split frame gearbox

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Also Published As

Publication number Publication date
CN102164715A (en) 2011-08-24
EP2331299A1 (en) 2011-06-15
DE102008042423A1 (en) 2010-04-01
US20110220380A1 (en) 2011-09-15
CN102164715B (en) 2015-05-20
EP3040166A1 (en) 2016-07-06
WO2010034565A1 (en) 2010-04-01
US8955617B2 (en) 2015-02-17

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