EP1881884A1 - Machine portable electrique - Google Patents

Machine portable electrique

Info

Publication number
EP1881884A1
EP1881884A1 EP06725574A EP06725574A EP1881884A1 EP 1881884 A1 EP1881884 A1 EP 1881884A1 EP 06725574 A EP06725574 A EP 06725574A EP 06725574 A EP06725574 A EP 06725574A EP 1881884 A1 EP1881884 A1 EP 1881884A1
Authority
EP
European Patent Office
Prior art keywords
switch
electric machine
machine tool
switching element
tool according
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.)
Withdrawn
Application number
EP06725574A
Other languages
German (de)
English (en)
Inventor
Heinz Schnerring
Willy Braun
Axel Kuhnle
Karl Frauhammer
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 EP1881884A1 publication Critical patent/EP1881884A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/04—Handles; Handle mountings
    • B25D17/043—Handles resiliently mounted relative to the hammer housing
    • 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
    • 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
    • B25F5/02—Construction of casings, bodies or handles
    • 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
    • B25D2216/0046—Preventing rotation
    • B25D2216/0061—Preventing rotation preventing reverse rotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/245—Spatial arrangement of components of the tool relative to each other

Definitions

  • the invention relates to a power tool according to the preamble of claim 1.
  • Handling of power tool machines, in particular rotary hammers, is problematic in that the operator is exposed to a relatively high load by vibration forces, for example during a hammer operation.
  • the handle is rotatably mounted on its lower cantilever, with a slight angular movement about the pivot point is executable. As a result, vibrations are damped, which makes the usability of the power tool more pleasant. In addition, the device is easier to use and can therefore be guided safely.
  • the problem with this design is an arrangement of electrical leads to the usually arranged in the handle on-off switch, the electrical leads should be located as close to the pivot point, not to abschwingen or relative routes between the device body and handle to reduce. For design reasons, such an arrangement is often difficult to achieve.
  • a switch arranged in the handle is indirectly connected to a arranged in the device body switching element for actuating an electrical on-off switch.
  • an electrical switching function arranged in the device body and a mechanical switching function arranged in the handle are separated. An acting on the electrical switching function
  • Vibration load is thus advantageously reduced to a minimum. As a result, especially the electrical safety is ensured. Another advantage is that no electrical leads to the mechanical switch in the handle are required because it is replaced by the indirect connection according to the invention. if the
  • the indirect connection is formed by a Bowden cable.
  • a wire cable is guided through a flexible plastic or metal hose, whereby conveniently the tensile forces arising during actuation of the mechanical switch in the handle can be transmitted via curved paths to the electrical switching element in the device body.
  • the handle of the power tool according to the invention is designed to be movable relative to the housing at least in the working direction. It can be provided that the handle is designed to be movable in parallel in the direction of impact. Another possibility is to form the switch and / or the switching element in each case pivotally mounted about a pivot point. As a result, a low angular movement of components about the pivot point is favorably possible, whereby the vibration load is reduced.
  • the switching element arranged in the device body is preferably designed as a lever with at least one upper and one lower lever arm. At its first free end, the Bowden cable can be connected to a lower lever of the mechanical switch arranged in the handle.
  • the mechanical switch is designed for example as a toggle switch or as a pawl.
  • the Bowden cable can be connected to one of the lever arms of the switching element.
  • a lever action of the lower lever arm of the mechanical switch is activated, the leverage being transmitted via the Bowden cable to one of the lever arms of the switching element.
  • the on-off switch is expediently activated automatically. If a potentiometer is connected to the on-off switch, it can be activated simultaneously via the described lever effect. With the potentiometer can be realized preferably designed as a gas function additional function.
  • a blocking function for a rotatable brush plate can be triggered.
  • a motor rotation direction for example, from a right turn to a left turn, be switched.
  • a detrimental changeover of the direction of engine rotation from full running can be prevented by a direct or an indirect blocking function.
  • directly locking the brush plate can be rotated or switched from the outside in the range of a commutator.
  • a changeover in the region of the handle can be triggered, preferably within the reach of the fingers, as a result of which the changeover function is designed to be particularly user-friendly.
  • the blocking function in the case of indirect locking can be triggered via one of the lever arms of the switching element and via a switching lever.
  • the switching lever can be operated via a slide, wherein the slide can be actuated only in a defined position of a rotary switch for a drilling operation.
  • the defined Position of the rotary switch in drilling operation are defined by a flattening on the rotary switch.
  • the embodiment of the invention is also conceivable for a power tool with a rigid, fixed handle and partially also chisel hammers, but no switching of the motor rotation is required.
  • Fig. 1 shows schematically a section through an embodiment of a hammer drill according to the invention
  • 2 schematically shows a section through an alternative embodiment of a hammer drill according to the invention with an unactuated mechanical switch in the handle.
  • FIG. 3 is an illustration according to FIG. 2 with the mechanical switch actuated;
  • FIG. and FIG. 4 is a plan view of a hammer drill according to the invention.
  • Fig. 1 shows a section through a hammer drill according to the invention in a schematic view.
  • the hammer drill comprises a device body 10 arranged in a housing 11 and a handle 12.
  • a motor 34 is arranged in the device body 10.
  • a switching of the direction of rotation of the motor 34 is possible via a rotatable brush plate 25. Conveniently, thus switching the direction of rotation can be triggered, as used for example for loosening screws.
  • the handle 12 is at least least in the working direction 17 movably formed to the housing 11.
  • the handle 12 is rotatably configured about a pivot point 30, whereby a vibration-damping function is fulfilled.
  • a mechanical switch 13 is arranged, which is designed as a pawl.
  • the pawl 13 is indirectly connected to a device body 10 arranged in the switching element 14 for actuating an electrical on-off switch 15.
  • a potentiometer 24 is integrated in the on-off switch 15.
  • the switching element 14 is designed as a lever with an upper and a lower lever arm 20, 22.
  • An electrical switching function arranged in the device body 10 and a mechanical switching function arranged in the handle 12 are thus formed separately, so that an oscillation load acting on the electrical switching function is advantageously reduced to a minimum.
  • the switch 13 is pivotally mounted about a pivot point 18, and the switching element 14 about a pivot point 19. As a result, the vibrations acting on the individual components during operation of the power tool are optimally damped.
  • the indirect connection between the mechanical switch 13 and the switching element 14 is formed by a Bowden cable 16.
  • Plastic formed tubular sheath of the Bowden cable 16 is supported at its free ends on the stops 31, 32 from.
  • the Bowden cable 16 is connected at its first free end to a lower lever arm 23 of the mechanical switch 13 and at its second free end to the upper lever arm 20 of the switching element 14th
  • the electrical on-off switch 15 and the potentiometer 24 can be activated via a lever action between the lower lever arm 23 of the switch 13 and the upper lever arm 20 of the switching element 14.
  • a lever ratio between the mechanical switch 12 and the switching element 14 is designed so that the on-off switch 15 a substantially directed against the direction of 17 switching path of a few millimeters, for example, less than 10mm is formed.
  • the integrated in the on-off switch 15 potentiometer 24 is provided as a gas-generating function and is activated by a corresponding actuation path of the mechanical switch 13. The more the mechanical switch 13 is depressed, the more the accelerator function is activated.
  • the lower lever arm 22 of the switching element 14 is moved in the working direction 17 via the Bowden cable 16, wherein the lower lever arm 22 carries out a lever travel of a few millimeters in the above-mentioned interpretation of the lever ratios.
  • the lever travel is smaller than the switching path on the on-off switch 15.
  • a direct blocking function for the rotatable brush plate 25 is triggered.
  • a rotation of the brush plate 25 about a motor axis 33 is thus blocked when the mechanical switch 12 is actuated by the lower lever arm 22 of the switching element 14 and thus not possible with the engine 34 running. It can thus be advantageously blocked a change in direction when the motor 34, whereby massive damage to the power tool can be prevented.
  • the conversion of the motor rotation direction by rotating the brush plate 25 can be made in the illustrated embodiment by not shown in FIG. 1 outwardly guided actuating ribs in the region of a commutator against a spring force.
  • FIG. 2 and 3 is a section through an alternative embodiment of a hammer drill according to the invention illustrated, wherein in each case a handle 12 in
  • Working direction 17 is designed to be movable in parallel.
  • a vibration-damping Elements are at an upper and a lower contact area between the handle 12 and the device body 10, an upper and a lower guide 35, 36 is formed.
  • the mechanical switch 13 is in the handle 12 in an unactuated state; in Fig. 3, the switch 13 is actuated.
  • Identical elements are denoted the same in the figures.
  • a flexible and vibration-resistant Bowden cable 16 transmits a path of the pawl 13 movably mounted about a pivot point 18 to lever arms 20, 21, 22 of a switching element 14 arranged in the device body 10.
  • the switching element 14 is in the form of a lever with three Lever arms 20, 21, 22 are formed and mounted movably about a pivot point 19.
  • the Bowden cable 16 is supported with its casing on stops 31, 32 from.
  • a free end of the Bowden cable 16 is connected to a lower lever arm 23 of the pawl 13, and another free end to the lower lever arm 22 of the switching element 14.
  • the switching lever 26 is rotatably mounted about a rotation axis 37.
  • the switching lever 26 is connected via a slider 27th operated, wherein the slider 27 can be operated only in a defined position of a rotary switch 28 for a drilling operation.
  • an upper lever arm 26a of the switching lever 26 is operated.
  • a lower lever arm 26b of the switching lever 26 can rotate the brush plate 25 by an angle, whereby a reversal of rotation is initiated.
  • Fig. 4 is a plan view of a hammer drill according to the invention from above.
  • a mechanical rotary switch 28 different modes are adjustable.
  • an arrow is provided as an indicator for the set mode.
  • the arrow points to the pictogram-like image of a screw thread, which is indicative of a normal drilling operation.
  • hammer modes adjustable, with a screw thread used in conjunction with a hammer as a pictogram-like figure. It is desirable that a reversal of the direction of motor rotation is possible only in the normal drilling operation without a hammer, as it is set as shown in Fig. 4.
  • the responsible for the switching of the engine rotation direction switching lever 26, which is not visible in Fig. 4, is operated by a slider 27.
  • the slider 27 is operable only in a defined position of the rotary switch 28 for a drilling operation, wherein the defined position is achieved by a flattening 29 of the otherwise round rotary switch 28. In this position, the slider 27 can be axially confirmed or moved from a left to a right detent position. The slider 27 is easily actuated in this position with two fingers. In any other position of the rotary switch 28, the slider 27 can not be operated, because this is prevented by a cantilever 38 of the slider 27.
  • it is thus prevented in a simple manner that the motor direction of rotation in the hammer operation, for example, from a clockwise to a Counterclockwise rotation is reversible, which could lead to massive damage to the power tool.
  • the direction of rotation reversal is thus designed to be particularly user-friendly.

Landscapes

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

Abstract

L'invention concerne une machine portable électrique comprenant un corps d'outillage (10), disposé dans un carter (11), et une poignée (12) dans laquelle est logé un interrupteur (13). L'invention est caractérisée en ce que l'interrupteur (13) est lié indirectement avec un élément de commutation (14) disposé dans le corps d'outillage (10) pour l'actionnement d'un interrupteur électrique de mise en circuit et hors circuit (15).
EP06725574A 2005-05-11 2006-04-05 Machine portable electrique Withdrawn EP1881884A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005021731A DE102005021731A1 (de) 2005-05-11 2005-05-11 Elektrowerkzeugmaschine
PCT/EP2006/061344 WO2006120092A1 (fr) 2005-05-11 2006-04-05 Machine portable electrique

Publications (1)

Publication Number Publication Date
EP1881884A1 true EP1881884A1 (fr) 2008-01-30

Family

ID=36572167

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06725574A Withdrawn EP1881884A1 (fr) 2005-05-11 2006-04-05 Machine portable electrique

Country Status (5)

Country Link
US (1) US20100018734A1 (fr)
EP (1) EP1881884A1 (fr)
CN (1) CN101247926A (fr)
DE (1) DE102005021731A1 (fr)
WO (1) WO2006120092A1 (fr)

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JP2008264935A (ja) * 2007-04-20 2008-11-06 Makita Corp 手持ち工具のハンドル
JP5180697B2 (ja) * 2008-06-19 2013-04-10 株式会社マキタ 手持式作業工具
DE102008041511A1 (de) * 2008-08-25 2010-03-04 Robert Bosch Gmbh Gerätehauptschalter für elektrische Werkzeugmaschinen, insbesondere Elektrohandwerkzeuge, und ein Elektrohandwerkzeug
GB0902315D0 (en) * 2009-02-12 2009-04-01 Black & Decker Inc Switch assembly for a power tool
JP5502458B2 (ja) 2009-12-25 2014-05-28 株式会社マキタ 打撃工具
DE102010038750A1 (de) * 2010-08-02 2012-02-02 Robert Bosch Gmbh Elektrowerkzeugmaschine mit arretierbarer Schaltwippe
DE102010038753A1 (de) * 2010-08-02 2012-02-02 Robert Bosch Gmbh Antivibrationshandgriff mit auf Zug belasteter Schaltverbindung
DE102010063962A1 (de) * 2010-12-22 2012-06-28 Robert Bosch Gmbh Arretierbarer elektrischer Schalter
DE102011120469A1 (de) * 2011-12-07 2013-06-13 Andreas Stihl Ag & Co. Kg Arbeitsgerät mit einem Bowdenzug
DE102011089718A1 (de) * 2011-12-23 2013-06-27 Robert Bosch Gmbh Werkzeugmaschine
US9849577B2 (en) 2012-02-03 2017-12-26 Milwaukee Electric Tool Corporation Rotary hammer
DE102012215025A1 (de) * 2012-08-23 2014-02-27 Metabowerke Gmbh Angetriebene Werkzeugmaschine, insbesondere Winkelschleifer oder Geradschleifer
JP6070945B2 (ja) * 2013-05-28 2017-02-01 日立工機株式会社 携帯型作業機
JP6096593B2 (ja) * 2013-05-29 2017-03-15 株式会社マキタ 往復動式作業工具
CN205651293U (zh) * 2013-07-15 2016-10-19 米沃奇电动工具公司 旋转动力工具
US10014128B2 (en) * 2013-12-17 2018-07-03 Robert Bosch Tool Corporation Portable power tool with trigger switch, trigger release and lock-on mechanism combination
EP2898991B1 (fr) 2014-01-23 2018-12-26 Black & Decker Inc. Poignée arrière
EP2898994A1 (fr) 2014-01-23 2015-07-29 Black & Decker Inc. Outil électrique avec une poignée arrière
EP2898992B1 (fr) 2014-01-23 2016-05-04 Black & Decker Inc. Outil électrique avec poignée arrière, méthode d'assemblage d'une partie d'une poignée pour un outil électrique et méthode de démontage d'une partie d'une poignée pour un outil électrique
EP2898993B1 (fr) 2014-01-23 2019-01-30 Black & Decker Inc. Outil electrique
JP6620434B2 (ja) * 2015-06-12 2019-12-18 マックス株式会社 打撃工具
DE102015226440A1 (de) 2015-12-22 2017-06-22 Robert Bosch Gmbh Handwerkzeugmaschinenvorrichtung
DE102016209637A1 (de) * 2016-06-02 2017-12-07 Robert Bosch Gmbh Handwerkzeugmaschine mit einer Schalteinheit
DE102018217152A1 (de) * 2018-10-08 2020-04-09 Robert Bosch Gmbh Handwerkzeugmaschine
US11498198B2 (en) * 2019-08-20 2022-11-15 The Boeing Company Ergonomic handle for a power tool
US11845168B2 (en) * 2019-11-01 2023-12-19 Makita Corporation Reciprocating tool
US11926030B2 (en) * 2020-08-24 2024-03-12 Makita Corporation Power tool having hammer mechanism

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Also Published As

Publication number Publication date
DE102005021731A1 (de) 2006-11-16
WO2006120092A1 (fr) 2006-11-16
CN101247926A (zh) 2008-08-20
US20100018734A1 (en) 2010-01-28

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