EP2180979B1 - Outil à main électrique - Google Patents

Outil à main électrique Download PDF

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Publication number
EP2180979B1
EP2180979B1 EP07801768A EP07801768A EP2180979B1 EP 2180979 B1 EP2180979 B1 EP 2180979B1 EP 07801768 A EP07801768 A EP 07801768A EP 07801768 A EP07801768 A EP 07801768A EP 2180979 B1 EP2180979 B1 EP 2180979B1
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EP
European Patent Office
Prior art keywords
output
planet carrier
output shaft
hand tool
tool device
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
EP07801768A
Other languages
German (de)
English (en)
Other versions
EP2180979A1 (fr
Inventor
Chistoph Maier
Arttu Däschler
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.)
Metabowerke GmbH and Co
Original Assignee
Metabowerke GmbH and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metabowerke GmbH and Co filed Critical Metabowerke GmbH and Co
Publication of EP2180979A1 publication Critical patent/EP2180979A1/fr
Application granted granted Critical
Publication of EP2180979B1 publication Critical patent/EP2180979B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • 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

Definitions

  • the invention relates to an electric hand tool, in particular a drill, in particular a Akkubohrschrauber comprising a gear housing and driven by a drive motor drive shaft which is connected via a switchable planetary gear with an output shaft, wherein the planetary gear comprises a driven side planet carrier.
  • Such an electric hand tool device may in particular be an electric hand tool device with a rotating output.
  • Such electric hand tool devices are in particular next Bohrdrubern Schauber or drills.
  • a corresponding electric hand tool device is for example in the DE 35 25 208 A1 describes a reduction gear with a speed change device for a motor-driven drill comprising a planetary gear, wherein a bearing is provided for the output shaft, which is fixed to the transmission housing.
  • the output shaft is connected to the output-side planet carrier for transmitting the torque.
  • an electric hand tool according to the preamble of claim 1 in the EP 1 726 849 A1 shown having a switchable planetary gear, which connects a drive shaft driven by a drive motor with an output shaft.
  • the output shaft is mounted in a conventional manner at its output end and at its drive end end by suitable bearings, wherein the drive end end additionally extends through a recess in the planet carrier inside.
  • the invention now achieves this object by a drive-side end of the output shaft is guided by means of the output side planet carrier and the output side planet carrier in the transmission housing radially via a radial forces receiving bearing, the is disposed between the output-side planetary carrier and the transmission housing is stored.
  • the radial mounting of the output-side planetary carrier can take place via a roller bearing, in particular via a roller or a ball bearing.
  • the bearing can be performed with respect to its inner ring between a shoulder of the driven side planet carrier and a housing shoulder in the axial direction, wherein the outer ring between the housing shoulder and a fixed ring in the housing can be held in the axial direction.
  • the bearing is arranged coaxially with the output-side planet carrier on the outer circumference.
  • Such a configuration is advantageous because the drive-side end of the output shaft is stabilized by the radial bearing of the planet carrier with the storage of the output shaft to the planet carrier and also undergoes a radial guidance.
  • the drive-side bearing of the output shaft at its be configured outermost drive-side end.
  • the output shaft may be slidably mounted in the output side planet carrier, which in this case has an inner bore which receives the output shaft.
  • a Klemmgesperre between the drive shaft and output shaft is provided to block a rotation transmission from the output shaft to the drive shaft.
  • the provision of a Klemmgesperres offers advantages including the one-handed clamping of tools in a tool chuck, which is connected to the output side end of the output shaft with this.
  • the output-side planetary carrier has driving elements for the Klemmgesperre.
  • the driver elements for the Klemmgesperre can be integrally formed on the output side planet carrier, in particular on the opposite side in the axial direction to the planet of the driven side planet carrier.
  • the Klemmgesperre can otherwise be formed in a conventional form comprising clamping body, in particular cylindrical pinch rollers and corresponding clamping surfaces.
  • the Klemmgesperre serves to allow a rotation transmission from the drive shaft to the output shaft and to block at a torque transmission from the output shaft to the drive shaft and thus prevent co-rotation of the drive shaft, which may possibly lead to damage to the drive motor.
  • the output-side planet carrier at the same time also carries the driver elements of the Klemmgesperres referred to as a spindle lock
  • a radial bearing only over the planet has the consequence that no precise concentricity of the driver elements can be guaranteed. It can then lead to tilting of the driver elements of the Klemmgesperres at certain speeds, so that the driver elements tilt and tilt with other elements of the Klemmgesperres, in particular designed as a cylindrical pins pinch rollers.
  • inventively provided radial support of the output side planet carrier a constant function of the Klemmgesperres can be ensured and the risk that the Klemmgesperre cant or hitting, can be reduced because of the exact concentricity of the driver is guaranteed.
  • the planetary gear in particular has two switching stages.
  • Such a planetary gear is for example in the DE 10 2006 025 583 described and offers a high level of comfort and a long service life, since all the gears are in a corresponding arrangement constantly in engagement, resulting in low wear results.
  • the ring gears of the two gear stages are rotatably connected to each other and are in particular formed as a Doppelhohlrad, wherein the ring gear of the output serving gear stages may have a smaller inner diameter than the ring gear of the other gear stage, the size ratios depending on the desired gear ratios are to choose.
  • a first shift stage (2nd gear)
  • the interconnected ring gears are blocked, so that the planetary carrier not the output switching stages turns freely.
  • the planet gears of the output planetary stage drive the output side planet carrier, so that it drives the output shaft at high speed.
  • the slow gear (1st gear) of the other switching stage however, the planet carrier of the drive-side planetary stage is blocked and the ring gears of the two gear stages, which are rotatably connected to each other, can rotate.
  • the ring gear is driven by a sun gear opposite direction of rotation, resulting in a different rotational or Abrollán the planet of the output side switching stage results and thus a different rotational speed of the driven side planet carrier.
  • an electric hand tool device which is hereby coupled.
  • the sun gears are rotatably coupled together and preferably integrally connected to each other.
  • the sun gears can have the same or a different outer diameter for both gear stages.
  • a switching ring which is axially displaceable so that it cooperates on the one hand with the planet carrier of the drive-side gear stage and on the other with the mutually coupled ring gears of the two gear stages.
  • the switching ring can be equipped for this purpose with a toothing or other engagement elements, which can cooperate with an external toothing or corresponding engagement elements of both the planet carrier of the drive-side gear stage and the ring gears of the gear stages, all of which have the same outer diameter.
  • the switching ring is at the same time rotatably fixed in the housing, for example via a rib which engages in a groove.
  • the switching ring can be connected to a by the user of the electric hand tool device to be operated switching handle, which performs a rotational movement, for example, when switching, which is transferred into the sliding movement of the switching ring.
  • the outer circumference of the output-side planetary carrier in contrast to the outer periphery of the drive-side planetary carrier on no teeth or engagement elements.
  • the drive-side end of the output shaft is slidably mounted in the output-side planet carrier, so there only experiences a radial guidance.
  • a bearing axial and radial forces bearing in particular a rolling bearing, which may be formed as a ball or roller bearings, is mounted. It can be achieved so that the bearings of the output shaft are as far away from each other, and as possible a tilt-free storage of the output shaft can be done. In this way, the axial space of the electric hand tool device can be kept low with stable storage at the same time, which is particularly desirable in drills, but also in drills and screwdrivers.
  • the single figure shows a longitudinal section through a gear housing of an electric hand tool device, in particular a cordless screwdriver, which may be connected to a further housing, for example for receiving an electric motor (not shown).
  • the further housing may also include a handle for guiding the electric hand tool device.
  • the transmission housing is provided with the reference numeral 12.
  • a planetary gear 14 is arranged comprising a Doppelhohlrad 16 for the two gear stages, the Doppelhohlrad 16 planets 18 of the drive-side gear stage and planet 20 of the output-side planetary gear are associated and roll in this.
  • the drive-side planet 18 are connected to a drive-side planet carrier 22, which carries the planet 18.
  • the planet 20 of the output-side gear stage are connected to a driven side planet carrier 24 and are also supported by this bolt 26.
  • the sun gear is here provided with the reference numeral 30 and is rotatably connected to the drive shaft 32.
  • the drive shaft 32 is at its right end in the illustration with a motor (not shown), in particular an electric motor of the electric hand tool device coupled.
  • the planetary gear 14 also includes a switching ring 34 which is axially displaceable in the direction of arrow 36, wherein it blocks the planet carrier 22 of the drive-side switching stage in the illustration shown by the switching ring 34 with the external teeth of the drive-side planetary carrier 22 is engaged and fixed in the transmission housing 22, for example, by means of a rib which engages in a groove is fixed.
  • a switching handle 38 is provided, which is designed as a rotary knob and thus a rotational movement in a sliding movement of the Wegrings 34 translated.
  • the corresponding electric hand tool device with two switching stages is in slow gear, which is done by moving the switching ring 34 in the region of the ring gear 16 and thus blocking the ring gear 16 against rotation in a fast transition.
  • the driven-side planetary carrier 24 further carries driving elements 40 of a Klemmgesperres 42 which is formed so that a rotation transmission from the drive shaft 32 to an output shaft 44 is possible, however, a rotation transmission from the output shaft 44 is blocked on the drive shaft 32 by the Klemmgesperre 42.
  • the Klemmgesperre cylindrical rollers 46 as clamping rollers which are clamped in the case of clamping between the gear housing 12 and an inner clamping heart 50 and thus block the torque transmission.
  • roller bearing 52 is in this case arranged between the gear housing 12 and the output-side planetary carrier 24 and thus serves for radial stabilization, which would otherwise only take place via the planets 20, which would thus be subject to greater wear.
  • the bearing of the drive-side end 58 of the output shaft 44 takes place slidably in the output-side planet carrier 24, which for this purpose has an inner bore which receives the output shaft 44. Furthermore, it is provided that the output-side end 54 of the output shaft 44 by means of a roller bearing 56, both axial and radial forces to take up, to store. In this way it can be achieved that, despite the short length of the output shaft 44, the bearings on the output shaft 44 are arranged as far apart as possible, so as to provide a stable mounting of the output shaft and prevent tilting the same, resulting in a designated Klemmgesperre 42 to a Hitting the Klemmgesperres can lead. Due to the mounting of the output-side planetary carrier 24, the concentricity of the planetary carrier can be better ensured, regardless of the application situation.
  • a comparatively short construction gear assembly for a power tool with rotating output in particular a screwdriver, drill or drill can be provided.

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

Claims (8)

  1. Outil électrique à main, en Particulier une tarière, comprenant un carter de mécanisme (12) ainsi qu'un arbre d'entrée (32) entraîné par un moteur d'entraînement et relié à un arbre de sortie par l'intermédiaire d'un train épicycloïdal commutable, (14) comportant un arbre de sortie (44), le train épicycloïdal comprenant un porte-satellites (24) côté sortie, caractérisé en ce qu'une extrémité côté entrée (58) de l'arbre de sortie (44) est guidée au moyen du porte-satellites côté sortie (24) et que le porte-satellites côté sortie (24) est monté radialement dans le carter de mécanisme (12) au moyen d'un palier absorbant les efforts radiaux, qui est disposé entre le porte-satellites côté sortie (24) et le carter de mécanisme (12).
  2. Outil électrique à main selon la revendication 1, caractérisé en ce qu'un encliquetage à serrage (42) est prévu entre l'arbre d'entrée (32) et l'arbre de sortie (44), lequel encliquetage étant monté en particulier en aval du train épicycloïdal (14), pour s'opposer à la transmission de la rotation de l'arbre de sortie (44) à l'arbre d'entrée (32).
  3. Outil électrique à main selon la revendication 2, caractérisé en ce que le porte-satellites côté sortie (24) comporte des organes entraîneurs (40) pour l'encliquetage à serrage (42), lesquels organes étant en particulier d'une seule pièce avec le porte-satellites côté sortie (24).
  4. Outil électrique à main selon l'une des revendications précédentes, caractérisé en ce que le train épicycloïdal (14) comporte deux étages commutables.
  5. Outil électrique à main selon la revendication 4, caractérisé en ce que les couronnes (16) des étages commutables sont assemblées l'une à l'autre en une seule pièce.
  6. Outil électrique à main selon l'une des revendications précédentes, caractérisé en ce que l'extrémité côté entrée (58) de l'arbre de sortie (44) est montée coulissante dans le porte-satellites côté sortie (24).
  7. Outil électrique à main selon l'une des revendications précédentes, caractérisé en ce que, pour le montage radial du porte-satellites côté sortie (24), un roulement (52) est disposé entre le porte-satellites côté sortie (24) et le carter de mécanisme (12).
  8. Outil électrique à main selon l'une des revendications précédentes, caractérisé en ce que l'extrémité côté sortie (54) de l'arbre de sortie (44) est montée au moyen d'un palier (56) qui absorbe les efforts axiaux et radiaux, en particulier au moyen d'un roulement, le palier (56) étant disposé entre l'arbre de sortie (44) et le carter de mécanisme (12).
EP07801768A 2007-08-20 2007-08-20 Outil à main électrique Active EP2180979B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/007328 WO2009024165A1 (fr) 2007-08-20 2007-08-20 Outil à main électrique

Publications (2)

Publication Number Publication Date
EP2180979A1 EP2180979A1 (fr) 2010-05-05
EP2180979B1 true EP2180979B1 (fr) 2011-06-08

Family

ID=39495952

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07801768A Active EP2180979B1 (fr) 2007-08-20 2007-08-20 Outil à main électrique

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Country Link
EP (1) EP2180979B1 (fr)
AT (1) ATE511959T1 (fr)
WO (1) WO2009024165A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008017689U1 (de) 2008-02-26 2010-03-25 Metabowerke Gmbh Planetengetriebe für ein Elektrohandwerkzeuggerät sowie Elektrohandwerkzeuggerät
DE102008042423A1 (de) 2008-09-29 2010-04-01 Robert Bosch Gmbh Handwerkzeugmaschine mit einer Spindel zur Aufnahme eines Werkzeugs
US9233461B2 (en) 2012-02-27 2016-01-12 Black & Decker Inc. Tool having multi-speed compound planetary transmission

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3525208A1 (de) * 1984-07-16 1986-01-23 Japan Strage Battery Co. Ltd., Kyoto Untersetzungsgetriebe
JP3291609B2 (ja) * 1996-02-13 2002-06-10 株式会社マキタ 電動工具のクラッチ機構
JP2005249110A (ja) * 2004-03-05 2005-09-15 Daijiro Nakamura 回転出力装置
JP4405900B2 (ja) * 2004-03-10 2010-01-27 株式会社マキタ インパクトドライバ

Also Published As

Publication number Publication date
ATE511959T1 (de) 2011-06-15
WO2009024165A1 (fr) 2009-02-26
EP2180979A1 (fr) 2010-05-05

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