EP2331299B1 - Machine-outil manuelle équipée d'une broche destinée à recevoir un outil - Google Patents

Machine-outil manuelle équipée d'une broche destinée à recevoir un outil 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
Authority
EP
European Patent Office
Prior art keywords
bearing
hand
held power
spindle
power tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP09781744.9A
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German (de)
English (en)
Other versions
EP2331299A1 (fr
Inventor
Heiko Roehm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to EP15201826.3A priority Critical patent/EP3040166A1/fr
Publication of EP2331299A1 publication Critical patent/EP2331299A1/fr
Application granted granted Critical
Publication of EP2331299B1 publication Critical patent/EP2331299B1/fr
Active legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • 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.

Landscapes

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

Claims (13)

  1. Machine-outil manuelle, en particulier machine-outil manuelle électrique (1), par exemple visseuse à accumulateur ou foreuse à accumulateur, dotée d'une transmission accouplée à une broche (5) de réception d'un outil,
    la broche (5) étant montée par l'intermédiaire d'un palier (6) côté outil et d'un palier (7) côté moteur,
    le palier (7) côté moteur étant soutenu radialement sur un composant (12) de la transmission (4) qui tourne dans la même direction,
    caractérisée en ce que
    un verrou de broche (14) est prévu pour centrer la broche (5) et
    en ce que les cylindres (15) de verrouillage de broche du verrou de broche (14) sont disposés axialement entre le palier (6) côté outil et le palier (7) côté moteur et reposent directement sur la broche (5).
  2. Machine-outil manuelle selon la revendication 1, caractérisée en ce que le palier (7) côté moteur est soutenu axialement sur le composant (12) de la transmission (4).
  3. Machine-outil manuelle selon l'une des revendications 1 ou 2, caractérisée en ce que la transmission est configurée comme transmission (4) à planétaires.
  4. Machine-outil manuelle selon la revendication 3, caractérisée en ce que le palier (7) côté moteur est soutenu radialement vers l'extérieur sur un composant (12) de la transmission (4) à planétaires qui tourne dans la même direction.
  5. Machine-outil manuelle selon la revendication 3, caractérisée en ce que le palier (7) côté moteur est soutenu radialement vers l'extérieur sur un porte-planétaires (12) de la transmission (4) à planétaires.
  6. Machine-outil manuelle selon la revendication 5, caractérisée en ce que le palier (7) côté moteur est entouré radialement par le porte-planétaires (12).
  7. Machine-outil manuelle selon l'une des revendications 3 à 6, caractérisée en ce que la transmission (4) à planétaires est réalisée en au moins deux étages.
  8. Machine-outil manuelle selon l'une des revendications précédentes, caractérisée en ce que le palier (7) côté moteur est configuré comme palier libre à possibilité de déplacement axial.
  9. Machine-outil manuelle selon l'une des revendications précédentes, caractérisée en ce que le palier (6) côté outil est configuré comme palier fixe à blocage axial vis-à-vis du boîtier (3) de la machine-outil manuelle (1).
  10. Machine-outil manuelle selon l'une des revendications précédentes, caractérisée en ce que le verrou de broche (14) entoure en partie le porte-planétaires (12).
  11. Machine-outil manuelle selon l'une des revendications précédentes, caractérisée en ce que le palier (7) côté moteur est disposé au voisinage du côté frontal de la broche (5).
  12. Machine-outil manuelle selon l'une des revendications précédentes, caractérisée en ce qu'au moins un palier (6, 7) est configuré comme palier de roulement.
  13. Machine-outil manuelle selon l'une des revendications précédentes, caractérisée en ce qu'au moins un palier (6, 7) est configuré comme palier de glissement.
EP09781744.9A 2008-09-29 2009-08-12 Machine-outil manuelle équipée d'une broche destinée à recevoir un outil Active EP2331299B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15201826.3A EP3040166A1 (fr) 2008-09-29 2009-08-12 Machine-outil manuelle équipée d'une broche destinée à recevoir un outil

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810042423 DE102008042423A1 (de) 2008-09-29 2008-09-29 Handwerkzeugmaschine mit einer Spindel zur Aufnahme eines Werkzeugs
PCT/EP2009/060429 WO2010034565A1 (fr) 2008-09-29 2009-08-12 Machine-outil manuelle équipée d'une broche destinée à recevoir un outil

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP15201826.3A Division EP3040166A1 (fr) 2008-09-29 2009-08-12 Machine-outil manuelle équipée d'une broche destinée à recevoir un outil
EP15201826.3A Division-Into EP3040166A1 (fr) 2008-09-29 2009-08-12 Machine-outil manuelle équipée d'une broche destinée à recevoir un outil

Publications (2)

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

Family

ID=41226241

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09781744.9A Active EP2331299B1 (fr) 2008-09-29 2009-08-12 Machine-outil manuelle équipée d'une broche destinée à recevoir un outil
EP15201826.3A Withdrawn EP3040166A1 (fr) 2008-09-29 2009-08-12 Machine-outil manuelle équipée d'une broche destinée à recevoir un outil

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP15201826.3A Withdrawn EP3040166A1 (fr) 2008-09-29 2009-08-12 Machine-outil manuelle équipée d'une broche destinée à recevoir un outil

Country Status (5)

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

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009054929B4 (de) * 2009-12-18 2022-08-11 Robert Bosch Gmbh Handwerkzeugmaschinenvorrichtung
DE102011005553A1 (de) * 2010-10-15 2012-04-19 Robert Bosch Gmbh Handgeführtes Elektrowerkzeug mit einer 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 (ja) * 2012-09-26 2014-05-08 Makita Corp 動力工具
DE102013212196A1 (de) 2013-06-26 2014-12-31 Robert Bosch Gmbh Handwerkzeugmaschine mit einer Spindellockvorrichtung
US20170276214A1 (en) * 2016-03-25 2017-09-28 Jerry M. Cockrell Split frame gearbox

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009024165A1 (fr) * 2007-08-20 2009-02-26 Metabowerke Gmbh Outil à main électrique

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
US4823627A (en) * 1987-06-23 1989-04-25 Mills Ned D Mechanical transmission
DE3742952A1 (de) * 1987-12-18 1989-07-06 Fein C & E Maschine mit variabler drehmomenteinstellung
NL9101335A (nl) * 1991-08-02 1993-03-01 Emerson Electric Co Transmissie voor elektrisch aangedreven gereedschap.
GB9604553D0 (en) 1996-03-02 1996-05-01 Black & Decker Inc Shaft locking device
DE19942271C2 (de) * 1999-09-04 2002-01-31 Metabowerke Kg Elektrowerkzeug mit einem Klemmgesperre und einer Sicherheitskupplung
GB0111535D0 (en) * 2001-05-11 2001-07-04 Johnson Electric Sa Gear motor for power tool
JP2005249110A (ja) * 2004-03-05 2005-09-15 Daijiro Nakamura 回転出力装置
JP3963323B2 (ja) * 2003-02-07 2007-08-22 株式会社マキタ 電動工具
DE10350619B4 (de) * 2003-10-30 2008-05-21 Metabowerke Gmbh Motorbetriebenes Handwerkzeuggerät mit einer Sperr-/Freigabeeinrichtung für die Spindel
JP4291173B2 (ja) * 2004-02-10 2009-07-08 株式会社マキタ インパクトドライバ
DE102004058809A1 (de) * 2004-12-07 2006-06-08 Robert Bosch Gmbh Handwerkzeugmaschine mit einer Drehmomentbegrenzungseinheit
ES2308666T3 (es) * 2006-05-19 2008-12-01 BLACK & DECKER, INC. Mecanismo de cambio de modalidad de trabajo para una herramienta a motor.
DE102006059633B4 (de) * 2006-12-14 2016-12-01 Robert Bosch Gmbh Schlagbohrmaschine
EP2095909A1 (fr) * 2008-02-26 2009-09-02 Metabowerke Gmbh Train épicycloïdal pour une machine-outil électrique et machine-outil portative électrique

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Publication number Priority date Publication date Assignee Title
WO2009024165A1 (fr) * 2007-08-20 2009-02-26 Metabowerke Gmbh Outil à main électrique

Also Published As

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

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