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EP2234771B1 - Machine-outil - Google Patents

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Publication number
EP2234771B1
EP2234771B1 EP08868602.7A EP08868602A EP2234771B1 EP 2234771 B1 EP2234771 B1 EP 2234771B1 EP 08868602 A EP08868602 A EP 08868602A EP 2234771 B1 EP2234771 B1 EP 2234771B1
Authority
EP
European Patent Office
Prior art keywords
switching
power tool
portable power
switching means
shaft
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
EP08868602.7A
Other languages
German (de)
English (en)
Other versions
EP2234771A1 (fr
Inventor
Andre Ullrich
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
Publication of EP2234771A1 publication Critical patent/EP2234771A1/fr
Application granted granted Critical
Publication of EP2234771B1 publication Critical patent/EP2234771B1/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
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/006—Mode changers; Mechanisms connected thereto
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/061—Swash-plate actuated impulse-driving mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0015—Tools having a percussion-only mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0023—Tools having a percussion-and-rotation mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0038—Tools having a rotation-only mode

Definitions

  • the invention relates to a hand tool according to the preamble of claim 1.
  • Such a hand tool machine goes from the US 4 418 766 A out. It is already known a hand tool with an intermediate flange and a gear unit, in which a switching means is arranged on the intermediate flange.
  • the invention relates to a hand tool, in particular a drill and / or chisel, with an intermediate flange and a gear unit having a mounted on the intermediate flange switching means.
  • the invention provides a hand tool according to claim 1.
  • a “gear unit” should be understood to mean, in particular, a unit which has movable connections of parts and is intended for transmission and / or conversion of force and / or torque and / or guidance of parts.
  • a “intermediate flange” here in particular defines a component which is intended to support drive elements, such as a motor shaft, a hammer tube, an intermediate shaft and / or other gear elements which appear expedient to the person skilled in the art.
  • the intermediate flange can also be made in one piece with a hand tool housing.
  • switching means is intended here in particular a key, a toggle switch, a spring and / or a lever are understood to be particularly advantageous.
  • the switching means is designed as a rotatably mounted lever.
  • a “gear stage” here defines a special arrangement of components of a transmission, wherein the different gear stages for operation of the power tool with different modes, such as drilling, impact drilling and / or chiselling, are provided. Due to the configuration of the invention, a user-friendly handling of the power tool can be provided, which can also be made compactly, component-saving and cost-effective.
  • the gear unit has at least one switching sleeve, which is movable by means of the switching means.
  • a switching sleeve should be understood to mean, in particular, a cylindrical body which is mounted on and / or guided by a shaft, in particular an intermediate shaft, and / or which is intended to be assigned to at least one of the operating modes .
  • the gear unit has a further switching sleeve, whereby structurally simple at least two operating modes can be decoupled from each other.
  • the two shift sleeves are mounted on a shaft.
  • a "shaft” is to be understood as meaning, in particular, an element which is provided for transmitting a rotational movement and / or forces and / or for mounting components.
  • the components can be arranged rotationally fixed on the shaft.
  • the shaft can be decoupled by a connecting means into two shaft sections.
  • the shaft is formed by an intermediate shaft, but it is also the embodiment as another conceivable as suitable to the expert wave. Due to the common storage of the shift sleeves on a shaft, switching the gear ratios compact and structurally simple can be realized.
  • At least one of the shift sleeves is movably mounted in an axial direction which extends parallel to a longitudinal extension of the intermediate shaft. Due to the movable mounting a coupling and / or decoupling the gear stages can be designed to save space.
  • the switching means has a contact area for applying an actuating element.
  • a "contact area” is to be understood as meaning in particular an area with, for example, a groove, an extension, a thread and / or another coupling formation that appears appropriate to the person skilled in the art, on which a component, such as an actuating element, is effective, in particular form, - force, and / or cohesive, can be connected to the switching means.
  • an actuator is to be understood in particular to mean an element, such as a button, a lever, a toggle switch and / or a rotary switch, which can be operated by an operator, preferably on an outer side of a housing of the power tool. Due to the configuration of the invention, an operation of a transmission mechanism can be made simple and user-friendly.
  • the power tool has a bearing point which is provided for a rotational mounting of the switching means on the intermediate flange.
  • a bearing point should be understood to mean, in particular, a point, such as a contact point and / or a recess, which defines a tilt axis, a rotation axis and / or a pivot axis of the switching means.
  • the switching means can be moved relative to a component which is arranged, for example, along the tilting axis, the axis of rotation and / or the pivoting axis, and can be arranged tiltable relative thereto and / or rotatable and / or pivotable.
  • a space-saving arrangement can be advantageously achieved when the switching means engages in a space between the two switching sleeves.
  • a "gap" is to be understood here in particular an area that is in one direction, preferably an axial direction of the power tool, between two components, such as the switching sleeves, and / or keeps the components spaced apart in at least one operating mode. Preferably, the gap is filled with air.
  • an intervention in the gap in at least one gear stage is force-free.
  • force-free should be understood in particular to mean that the switching means is in an equilibrium position in the state of engagement with the intermediate space, In this case, no forces, in particular in the axial direction, on the switching means.
  • the hand tool machine has a spring unit which is provided to act on a shift sleeve, at least in an operating mode with a spring force.
  • a "spring unit” should be understood to mean in particular a unit with at least one spring, the spring serving to store energy that can be converted into a movement, in particular into a movement of other components, such as a shift sleeve.
  • the spring is preferably designed as a helical spring, but it would also be another spring, such as a leaf spring, a torsion spring, a plate spring and / or another, the expert appears to be useful spring conceivable.
  • the spring force acts in at least one operating mode against a switching force.
  • a "switching force” is to be understood here in particular as a force which has to be expended for a switching movement of the switching means and / or one of the switching sleeves, in particular by an operator.
  • the inventive design can structurally be easily moved back to a starting position upon release of a switching path of a switchable component, in particular the switching sleeve.
  • FIG. 1 shows a hand tool 10 according to the invention in the form of a hammer drill with a housing 36, a main handle 38 and a motor unit 40.
  • a hand tool 10 in the form of a hammer drill with a housing 36, a main handle 38 and a motor unit 40.
  • an intermediate flange 12 and a gear unit 14 are further arranged, wherein the gear unit 14 has a mounted on the intermediate flange 12 switching means 16 , which is provided for switching at least three gear stages of the transmission unit 14 (see. FIGS. 2 to 5 ).
  • housing 36 is disposed or mounted in an axial direction 24 between the motor unit 40, not shown, and a tool holder 42 of the intermediate flange 12 and the gear unit 14.
  • a drive torque of the motor unit 40 is transmitted via a drive shaft and two intermeshing gears to a shaft 22, in the form of an intermediate shaft (not shown), whereby an output tube 44 which is rotatably connected to a hammer tube 46, rotational and a percussion 48th is driven translationally.
  • a not shown here closer tool is arranged in the tool holder 42 and is rotated by means of a rotationally fixed coupling of the tool holder 42 with the output tube 44 in a drilling operation of the transmission unit 14.
  • the shaft 22 extends parallel to the hammer tube 46 and extends as seen in the vertical direction 50 below the hammer tube 46th
  • the striking mechanism 48 has a wobble mechanism 52 mounted on the shaft 22 and a racket movably guided in the axial direction 24 in the output tube 44, which delivers its impact energy, for example via an air cushion, to a striking means and thereby to the axially displaceably mounted tool (not shown).
  • the gear unit 14 also has a shift sleeve 18 and a further shift sleeve 20, which are movable by means of the switching means 16.
  • the two shift sleeves 18, 20 are mounted on the shaft 22 in the axial direction 24 movable.
  • the shift sleeve 18 is disposed in a region of the shaft 22 facing the tool holder 42, and the shift sleeve 20 is disposed in a region 56 facing the wobble mechanism 52.
  • the switching means 16 is arranged on the intermediate flange 12 and has a contact region 26, in the form of a recess 58, for applying an actuating element 28.
  • the actuating element 28 is arranged on an outer side 60 of the housing 36 and engages with a connection unit not shown in detail by a recess 62 in the housing 36 in the contact area 26 and in the recess 58 of the switching means 16 positively (see also FIG. 1 ).
  • the switching means 16 has a bearing 30, in the form of a recess 64, which is provided for a rotational support of the switching means 16 on the intermediate flange 12.
  • a connecting element 66 is introduced, which defines an axis 68 about which the switching means 16 can be pivoted.
  • the gear unit 14 engages the switching means 16 with an extension 70 which extends from the recess 58 in the direction of the shaft 22, in a gap 32 between the two switching sleeves 18, 20, wherein an intervention in the gap 32 is force-free.
  • the gear unit 14 has a spring unit 34, which comprises two springs 72 and 74 and which is intended to act on the shift sleeves 18, 20 in Schlagbohrmodus or the shift sleeve 18 in Bohrmodus or the shift sleeve 20 in the bit mode with a spring force.
  • the spring 72 is arranged in the axial direction 24 between the switching sleeve 18 and a rotatably connected to the shaft 22 transmission gear 76 and is supported with one of its axial ends on the shift sleeve 18 and the transmission gear 76 from.
  • the transmission gear 76 is fixed to the shaft 22 in the region 54 of the shaft 22 facing the tool holder 42 in an axial direction of the shaft 22 that extends parallel to the axial direction 24 arranged and meshes with a gear 78, which transmits a rotational movement of the shaft 22 on the hammer tube 46 and on the tool holder 42 and thus on the tool.
  • the gear 78 is rotatably mounted on the hammer tube 46 and connected via an overload clutch 80 with this operatively.
  • the spring 74 is arranged in the axial direction 24 between the shift sleeve 20 and a mounted on the shaft 22 bearing body 82 of the wobble mechanism 52 and is supported with one of its axial ends on the shift sleeve 20 and the bearing body 82 from.
  • the springs 72, 74 act on the shift sleeves 18, 20 with a spring force, whereby the shift sleeves 18, 20 with their internal teeth not shown here in engagement with a rotary engagement contour 84, which forms a connecting means of the shaft 22 , be pressed.
  • the shaft 22 has two shaft portions 94 and 100 which are connected via a member having the rotary engagement contour 84.
  • the rotary driving contour 84 is rotationally fixed and axially fixed to a region 86 which is arranged in the intermediate space 32, the shaft 22 is connected.
  • the rotational engagement contour 84 can be arranged on a separate component, which is fastened in a rotationally fixed manner to the region 86 of the shaft 22, or can be integrated into one of the shaft sections 94 and / or 100.
  • FIG. 4 a bit position of the gear unit 14 of the power tool 10 is shown.
  • the switching means 16 is pivoted about the axis 68 in a rotational direction 88 and in a clockwise direction about the actuator not shown here 28. By this pivoting movement, the switching means 16 is moved from its equilibrium position and a surface 90 of the extension 70 comes with a surface 92 of the switching sleeve 18 to a plant.
  • FIG. 5 again shows a Bohrgna the gear unit 14 of the power tool 10 for switching the gear unit 14 of the power tool 10 of the in the Figures 2 and 3 shown Schlagbohrgna in a gear position in which the transmission unit 14 only allows a drilling operation, the switching means 16 is pivoted in the direction of rotation 88 and counterclockwise about the axis 68 via the actuating element 28, not shown here.
  • the switching means 16 moves due to the pivoting movement of its equilibrium position and a surface 96 of the extension 70 comes with a surface 98 of the shift sleeve 20 to the plant.
  • the shift sleeve 20 is moved in the axial direction 24 against the spring force of the spring 74 on the shaft 22 in the direction of the bearing body 82 of the wobble mechanism 52.
  • the spring 74 is compressed and the internal teeth of the shift sleeve 20 comes with the rotational engagement contour 84 disengaged.
  • the bearing body 82 and the wobble gear 52 is decoupled from a rotational movement of the drive shaft and there is no transmission of torque to the wobble gear 52 and thus on the hammer mechanism 48, whereby the tool receives no impact pulse.
  • An engagement of the shift sleeve 18 remains untouched, whereby the rotational torque transmission to the hammer tube 46 or the tool holder 42 and the tool continues to take place via the shaft 22 and a drilling operation of the transmission unit 14 is made possible.
  • a return movement of the shift sleeve 20 in the axial direction 24 in the direction of the shift sleeve 18 works analogously to the return movement of the shift sleeve 18 by the spring force of the spring 74th

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)

Claims (10)

  1. Machine-outil portative, en particulier marteau perforateur et/ou marteau burineur, avec une bride intermédiaire (12) et une unité de transmission (14), qui présente un moyen de commutation (16) monté sur la bride intermédiaire (12), dans laquelle le moyen de commutation (16) est réalisé sous la forme d'un levier rotatif et est prévu pour une commutation d'au moins trois niveaux de transmission de l'unité de transmission (14), caractérisée en ce que l'unité de transmission (14) présente un manchon de commutation (18) et un autre manchon de commutation (20), qui sont déplaçables au moyen du moyen de commutation (16).
  2. Machine-outil portative au moins selon la revendication 1, caractérisée en ce que les deux manchons de commutation (18, 20) sont montés sur un arbre (22).
  3. Machine-outil portative au moins selon la revendication 1 ou 2, caractérisée en ce qu'au moins un des manchons de commutation (18, 20) est monté de façon mobile dans une direction axiale (24).
  4. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce que le moyen de commutation (16) présente une zone d'appui (26) pour la pose d'un élément d'actionnement (28).
  5. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée par un point d'appui (30), qui est prévu pour l'appui rotatif du moyen de commutation (16) sur la bride intermédiaire (12) .
  6. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce que le moyen de commutation (16) s'engage dans un espace intermédiaire (32) entre les deux manchons de commutation (18, 20).
  7. Machine-outil portative au moins selon la revendication 6, caractérisée en ce qu'un engagement dans l'espace intermédiaire (32) se produit sans force dans au moins un niveau de transmission.
  8. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée par une unité de ressort (34), qui est prévue pour soumettre un manchon de commutation (18, 20) à une force de ressort au moins dans un mode de fonctionnement.
  9. Machine-outil portative au moins selon la revendication 8, caractérisée en ce que la force de ressort agit contre une force de commutation au moins dans un mode de fonctionnement.
  10. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce que le levier présente un prolongement (70) et une surface (90) du prolongement (70) peut pivoter pour s'appliquer sur une surface (92) du manchon de commutation (18) et une surface (96) du prolongement (70) peut pivoter pour s'appliquer sur une surface (98) de l'autre manchon de commutation (20).
EP08868602.7A 2007-12-21 2008-11-03 Machine-outil Active EP2234771B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007062260A DE102007062260A1 (de) 2007-12-21 2007-12-21 Handwerkzeugmaschine
PCT/EP2008/064854 WO2009083311A1 (fr) 2007-12-21 2008-11-03 Machine-outil

Publications (2)

Publication Number Publication Date
EP2234771A1 EP2234771A1 (fr) 2010-10-06
EP2234771B1 true EP2234771B1 (fr) 2018-01-17

Family

ID=40229900

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08868602.7A Active EP2234771B1 (fr) 2007-12-21 2008-11-03 Machine-outil

Country Status (5)

Country Link
US (1) US20100270045A1 (fr)
EP (1) EP2234771B1 (fr)
CN (1) CN101903135B (fr)
DE (1) DE102007062260A1 (fr)
WO (1) WO2009083311A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009027223B4 (de) * 2009-06-26 2022-01-13 Robert Bosch Gmbh Handgeführtes Elektrowerkzeug mit Rastenwerk
DE102010063621A1 (de) * 2010-12-21 2012-06-21 Robert Bosch Gmbh Handwerkzeugmaschine
DE102012102610A1 (de) * 2011-03-29 2012-10-11 Emerson Electric Co. Direkt angetriebener Ablussrohrschneider
KR101546797B1 (ko) * 2014-06-27 2015-08-24 계양전기 주식회사 해머드릴
US10328560B2 (en) * 2015-02-23 2019-06-25 Brian Romagnoli Multi-mode drive mechanisms and tools incorporating the same
CN107639595B (zh) * 2017-08-21 2024-12-06 永康市璟羽工贸有限公司 一种电锤
US11529727B2 (en) * 2019-10-21 2022-12-20 Makita Corporation Power tool having hammer mechanism

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4418766A (en) * 1979-07-25 1983-12-06 Black & Decker Inc. Compact multi-speed hammer-drill
CN2917974Y (zh) * 2006-06-20 2007-07-04 常州赛迪电气制造有限公司 多功能电锤

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178956A (en) * 1963-06-20 1965-04-20 Black & Decker Mfg Co Two-speed power tool transmission
US3934688A (en) * 1974-09-11 1976-01-27 The Black And Decker Manufacturing Company Shifter mechanism
JP3098963B2 (ja) * 1996-02-09 2000-10-16 リョービ株式会社 回転工具の動作切り換え機構
GB0008465D0 (en) * 2000-04-07 2000-05-24 Black & Decker Inc Rotary hammer mode change mechanism
JP3976187B2 (ja) * 2002-11-20 2007-09-12 株式会社マキタ ハンマードリル
DE10312980B4 (de) * 2003-03-24 2018-05-03 Robert Bosch Gmbh Bohrhammer oder Schlagbohrmaschine
DE102004019778B4 (de) * 2004-04-23 2022-04-28 Robert Bosch Gmbh Schaltstück
DE102005056205A1 (de) * 2005-11-25 2007-06-06 Robert Bosch Gmbh Bohrhammer mit drei Betriebsarten
DE102007009986A1 (de) * 2007-03-02 2008-09-04 Robert Bosch Gmbh Handwerkzeugmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4418766A (en) * 1979-07-25 1983-12-06 Black & Decker Inc. Compact multi-speed hammer-drill
CN2917974Y (zh) * 2006-06-20 2007-07-04 常州赛迪电气制造有限公司 多功能电锤

Also Published As

Publication number Publication date
WO2009083311A1 (fr) 2009-07-09
CN101903135B (zh) 2014-05-14
EP2234771A1 (fr) 2010-10-06
CN101903135A (zh) 2010-12-01
DE102007062260A1 (de) 2009-06-25
US20100270045A1 (en) 2010-10-28

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