EP2535149A2 - Outil de travail électrique avec une machine électrique, en particulier un outil électrique portatif - Google Patents

Outil de travail électrique avec une machine électrique, en particulier un outil électrique portatif Download PDF

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Publication number
EP2535149A2
EP2535149A2 EP12163741A EP12163741A EP2535149A2 EP 2535149 A2 EP2535149 A2 EP 2535149A2 EP 12163741 A EP12163741 A EP 12163741A EP 12163741 A EP12163741 A EP 12163741A EP 2535149 A2 EP2535149 A2 EP 2535149A2
Authority
EP
European Patent Office
Prior art keywords
battery
electrical
power supply
power
electric machine
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Withdrawn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
EP12163741A
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German (de)
English (en)
Other versions
EP2535149A3 (fr
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.)
Kress Elektrik GmbH and Co Elektromotorenfabrik
Original Assignee
Kress Elektrik GmbH and Co Elektromotorenfabrik
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 Kress Elektrik GmbH and Co Elektromotorenfabrik filed Critical Kress Elektrik GmbH and Co Elektromotorenfabrik
Publication of EP2535149A2 publication Critical patent/EP2535149A2/fr
Publication of EP2535149A3 publication Critical patent/EP2535149A3/fr
Withdrawn legal-status Critical Current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
    • B25F5/008—Cooling means
    • 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
    • B25F5/006—Vibration damping means
    • 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

Definitions

  • the invention relates to an electrical implement with an electric machine, in particular a hand-held power tool, according to the preamble of claim 1.
  • Electrical tools are used in a wide variety of applications and under various environmental conditions. Depending on the application, it is known that either battery-operated or mains-powered tools are preferred. If, for example, there is no mains connection for connecting the working device to a power supply network or if a certain manageability of the working device is required, then a power supply by means of a battery is used. However, due to its capacity and limited capacity, the battery limits the maximum performance of the implement as well as the maximum achievable duration of use. In contrast, the network operation provides a generally unlimited duration of use with a higher level of performance, but is bound to an availability of a network connection and to a perceived in many situations by a user as disturbing power cord. Also, a radius of use is limited by a maximum available length of the power cord.
  • electrical tools are known from the prior art, which are designed both for a battery operation and a network operation and for this purpose have a battery and an additional power connector. According to a given situation and the respective wishes of the user can be selected between the two modes and the associated power source can be used.
  • the DE 10 2007 025 625 A1 describes a corresponding hand-held implement, in particular a vacuum cleaner, with an electric drive motor and a power supply device for powering the electric drive motor.
  • the power supply device comprises a power plug for connection to an external power source and a detachably connected battery pack.
  • the arrangement is characterized in that the power supply of the electric drive motor either via the battery pack or the power plug - ie the external power source - takes place. This allows an optional operation of the hand-held implement in the known network operation or in battery-powered battery operation. A simultaneous power supply by means of the battery and the external power source is thus excluded.
  • the hand-held implement offers the possibility to not only operate the electric drive motor when connecting the implement to the external power source via the electrical power plug, but also to recharge the battery pack. This is achieved by a circuit in which the battery pack is connected in parallel to the internal electrical lines, via which the drive motor is supplied with electrical energy. The charging of the battery pack can be done independently of the operation of the electric drive motor.
  • the object of the invention is therefore to provide an electrical working device which eliminates or at least reduces the disadvantages described above, in particular allows a simplified circuit arrangement and ensures safe operation by a secure change between mains and battery operation while compact as possible design.
  • an electrical implement is provided with an electric machine for driving the implement and a power supply device for powering the electric machine, wherein the power supply device a battery for powering the electric machine in a battery operation of the implement and a power connector for connecting the electrical implement to an external power source in a network operation.
  • the power supply device is also designed such that the battery also provides power to the power supply of the electrical machine in the network operation.
  • an electric working device is to be understood as meaning all electrically operated working devices which permit battery operation and mains operation, in particular all hand-held working devices, such as, for example, drills, hammer drills, saws, grinding machines and the like.
  • the electrical working device also has a battery and a mains connection for operating the electrical implement in a battery-independent battery operation and a network-based network operation, but in both modes - ie both in battery mode and according to the invention in network operation - the drive of the electrical equipment by the Battery powered.
  • the battery therefore also provides electrical power for operation of the electrical equipment in mains operation.
  • the power supply device is designed such that the battery in the network operation simultaneously to the power supply of the electrical machine can be supplied with power from the external power source via the mains connection.
  • the power supply device may be connected such that in the network operation, if necessary, more electrical energy is supplied to the battery via the power plug, as is taken for the operation of the electrical machine simultaneously from this.
  • the battery can be charged during operation in addition, if there is a need for this. This is given, for example, when the battery has already been discharged. It can then be activated network operation, so that a further operation of the electric machine is made possible while charging the battery. In this way, you can dispense with a second battery for replacement or an additional external battery charger.
  • the power supply device may be configured such that charging of the battery only takes place in a switched-off state of the working machine.
  • an additional second power supply of the electric machine via the mains connection in addition to the power supply of the electrical machine by means of the battery, an additional second power supply of the electric machine via the mains connection.
  • a serving for the operation of the electric machine power is thus composed of a portion to be taken from the battery and a stemming from the power grid share, so that an achievable amperage added to a higher available value than is possible solely by means of the battery.
  • the electrical machine is thus, as described, simultaneously powered by two power sources - the battery and the power grid.
  • a particularly small and compact power supply can be achieved if the power supply is only dimensioned to support the battery.
  • the power supply and the battery are also connected in series, and the amount of power contributed by the power supply is merely designed to support battery power to extend its life.
  • the power supply can then operate without the current share of the battery, the electric machine.
  • the power supply supplies a current of 8A.
  • the battery has to contribute 2A to start the electric machine.
  • the runtime is significantly higher than when the battery alone has to provide for the power supply.
  • the battery can compensate for additional power peaks. If, for example, 16A is needed in the meantime, the battery can contribute the missing part of the current share of the power supply.
  • the battery acts as a buffer in this case.
  • the stated numerical values can be selected as desired, adapted to the respective machine.
  • An electric machine in the sense of this invention is a machine known in power engineering and represents an energy converter which converts electrical energy into mechanical energy.
  • the electric machine may accordingly comprise an electric motor.
  • the electric machine may also comprise a linear electric motor for providing a translational movement.
  • the power supply device comprises a charging device for charging the battery via the mains connection, wherein the charging device is arranged in the interior of a housing of the working device.
  • the charging device is arranged in the electrical working device and is not designed as an external power supply, which is only connected via a power cable to the electrical device.
  • This offers the advantage that a structural unit is provided so that the electrical implement is easier to handle and a user do not have to worry about a separate power supply.
  • the charging device is thus always available and can not be lost.
  • a weight of the electric working device can be increased, whereby vibrations in the operation of the electric working device can be damped.
  • the above-described possibility of reducing the power supply by means of the proposed circuit in its size has an advantageous effect.
  • the charging device is arranged in the effective range of a forced cooling of the electrical equipment.
  • Such forced cooling in electrical equipment is usually provided in the area of the electrical machine or in the area of other heating components for their cooling.
  • the cooling can therefore also be used for the charging device to dissipate a heat generated during operation of the charging device.
  • the battery is detachably connected to a housing of the electrical implement.
  • the battery can be detachably arranged either inside the housing or also on the housing of the electrical implement.
  • the battery of a housing portion of the electrical equipment is at least partially arcuately spanned to protect the battery. Since a battery despite a usually encapsulated construction a shock and represents heat-sensitive element and in particular a strong stress on connecting elements and contacts of the battery can occur to the electrical implement in shocks, the battery is inventively arranged such that the described housing portion at least partially spans the battery.
  • the housing forms in this way a protective bar, which can protect the battery and its connecting elements from shocks.
  • the battery may also be arranged in spatial proximity to a line of action of the implement, so that a net mass of the battery dampens vibrations of the implement during operation.
  • a line of action is defined, for example, by a direction of action of the electrical implement and describes that main direction in which machining in the workpiece to be machined is to take place mainly.
  • the line of action is thus directed along the implement or along a drilling axis or an output shaft. If the battery is arranged close to this line of action, a mass to be excited is locally increased and occurring oscillations are damped or at least natural vibration frequencies are shifted in such a way that the occurring excitation frequencies deviate therefrom.
  • the battery may be located both near the line of action and extending therefrom. This additionally makes it possible to provide a mass-laden lever arm, which additionally contributes to the damping of rotational irregularities or torsional vibrations.
  • the battery can be removed in a direction directed laterally to a line of action of the electrical implement.
  • This offers the advantage that an arrangement of Battery is made possible, which requires no accessibility from a critical side, in particular from a bottom of the electrical equipment. Since in particular an underside of the implement is subjected to increased shock and force effects in an insert, the battery can be protected by a corresponding configuration of the housing in this area, so that the battery is arranged protected.
  • a circuit arrangement according to the invention of a power supply device 10 is shown for an electrical implement.
  • the power supply device 10 includes a power supply 11, which is connected via a power cable 12 to an external power grid for feeding electrical energy in a network operation.
  • a charging device 15 and a battery 13 are connected in series with the power supply 11.
  • a motor 14 of the electrical implement is in turn connected in parallel to the battery 13 and thus in series with the power supply 11. This provides, inter alia, the possibility of a compact design of the implement or the corresponding section of the implement, in which the power supply device 10 is arranged.
  • the power supply 11 11 connected batteries 13 Because of in series too the power supply 11 11 connected batteries 13 always flows a current - ie both in network operation and in battery mode - on the battery 13. An operation of the implement is therefore not possible when the battery is removed.
  • the power supply 11 can deliver a first portion of the current used in the motor 14. A second portion of the current used is removed from the battery 14.
  • the motor 15 is supplied in a hybrid operation with simultaneous battery and mains operation from both power sources, so that add the current components to a total current at the desired height.
  • the power supply unit supplies, for example, a current share of 8A, then the 10A required for normal operation can be provided by a contribution of the battery in the amount of 2A.
  • the battery can also provide higher currents.
  • Fig. 2 shows a lateral schematic sectional view of an inventive device 20 shown as a hammer drill.
  • the internal structure of the implement 20 is shown only schematically and related to the aspects relevant to the invention.
  • the implement 20 comprises a housing 21 with a pistol grip-shaped first handle portion 22 and a second handle portion 23.
  • a drive motor 24 is arranged, which has an output shaft 25 drives.
  • the output shaft 25 defines a line of action W of the implement 20.
  • a power supply device 26 including a control circuit 26 which provides electric power to the drive motor 24 for conversion to mechanical rotational energy.
  • the current is taken both in a battery operation of the working device 20 and in a network operation from a laterally arranged on the second handle portion of battery 27 of the power supply device 26 and supplied to the drive motor 24 via the control circuit 26a.
  • the battery is supplied by a mains connection 28, which connects the working device 20 to an external power supply (not shown).
  • the housing of the working device 20 by means of the curved first handle portion 22 and the second handle portion 23 is a substantially D-shaped housing shape of the housing 21.
  • the battery 27 arranged such that it is enclosed by the housing 21 arcuately or spanned.
  • the battery 27 is thus completely surrounded with respect to the illustrated image plane of the housing and thus protected from shocks and other forces.
  • the battery 27 is detachably arranged on the second handle portion 23 and can be removed in a particularly simple manner laterally from the housing 21 (here: perpendicular to the image plane).
  • the battery 27 is moreover preferably arranged with an upper end 27a near the line of action W and makes a contribution to the reduction of vibrations due to its own mass of the implement. Furthermore, it is oriented such that the battery 27 extends away from the line of action W and thus counteracts and dampens torsional vibrations due to its own mass.
  • a forced cooling K of the implement is exemplified. This can of course also be carried out in another suitable manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Battery Mounting, Suspending (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
EP12163741.7A 2011-06-14 2012-04-11 Outil de travail électrique avec une machine électrique, en particulier un outil électrique portatif Withdrawn EP2535149A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011077485A DE102011077485A1 (de) 2011-06-14 2011-06-14 Elektrisches Arbeitsgerät mit einer elektrischen Maschine, insbesondere ein handgeführtes Elektrowerkzeug

Publications (2)

Publication Number Publication Date
EP2535149A2 true EP2535149A2 (fr) 2012-12-19
EP2535149A3 EP2535149A3 (fr) 2014-10-01

Family

ID=46084778

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EP12163741.7A Withdrawn EP2535149A3 (fr) 2011-06-14 2012-04-11 Outil de travail électrique avec une machine électrique, en particulier un outil électrique portatif

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Country Link
EP (1) EP2535149A3 (fr)
DE (1) DE102011077485A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017063852A1 (fr) * 2015-10-13 2017-04-20 Atlas Copco Industrial Technique Ab Procédé d'actionnement d'un moteur d'un outil de électrique, système d'alimentation et outil électrique
CN108462245A (zh) * 2017-02-21 2018-08-28 德国福维克控股公司 由设备和基站组成的系统
EP3825065A1 (fr) * 2019-11-19 2021-05-26 Andreas Stihl AG & Co. KG Appareil de travail fonctionnant sur accumulateur doté d'un conduit d'air de refroidissement

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015120159A1 (de) 2015-11-20 2017-05-24 Airbus Operations Gmbh Werkzeug und Verfahren zum Betreiben des Werkzeugs
DE102022205793A1 (de) 2022-06-08 2023-12-14 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Betreiben einer Hybridvorrichtung, Steuergerät, Hybridvorrichtung zum Betreiben eines Elektromotors und Arbeitsmaschine
DE202023103319U1 (de) 2023-05-10 2023-07-03 Reuter Gmbh & Co. Kg Schaltungsanordnung zur Spannungsversorgung einer elektrochemischen Reinigungseinrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007025625A1 (de) 2007-06-01 2008-12-04 Robert Bosch Gmbh Handgeführtes Arbeitsgerät, insbesondere Staubsauger

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DE2936675C2 (de) * 1979-09-11 1981-11-19 Wörl-Alarm August Wörl, 8035 Gauting Notstrombatterie-Überwachungsschaltung
DE3345736A1 (de) * 1983-12-17 1985-06-27 Braun Ag, 6000 Frankfurt Schaltungsanordnung zum betrieb eines elektrischen geraetes mit einer akkumulator-speisequelle
JP3863273B2 (ja) * 1997-12-26 2006-12-27 富士通株式会社 電源装置
US6883621B1 (en) * 2004-01-05 2005-04-26 Jack Lin Power supply structure of electromotive tool
US20050194928A1 (en) * 2004-03-08 2005-09-08 Ching-Wen Hou Power tool capable of charging a rechargeable battery unit that includes at least a standard-sized battery cell
US7176656B2 (en) * 2004-06-22 2007-02-13 Campbell Hausfeld/Scott Fetzer Company Tool with battery pack
DE102008014545A1 (de) * 2008-03-15 2009-09-17 Hans Kilian Fremmer Elektro-Werkzeuge mit Netz-Akku-Batterie-Betrieb
DE202008014976U1 (de) * 2008-11-12 2009-02-12 Robert Bosch Gmbh Akkubetriebenes Elektrohandwerkzeug

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007025625A1 (de) 2007-06-01 2008-12-04 Robert Bosch Gmbh Handgeführtes Arbeitsgerät, insbesondere Staubsauger

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017063852A1 (fr) * 2015-10-13 2017-04-20 Atlas Copco Industrial Technique Ab Procédé d'actionnement d'un moteur d'un outil de électrique, système d'alimentation et outil électrique
CN108136574A (zh) * 2015-10-13 2018-06-08 阿特拉斯·科普柯工业技术公司 驱动动力工具的电机的方法、电力供应系统以及动力工具
CN108462245A (zh) * 2017-02-21 2018-08-28 德国福维克控股公司 由设备和基站组成的系统
EP3825065A1 (fr) * 2019-11-19 2021-05-26 Andreas Stihl AG & Co. KG Appareil de travail fonctionnant sur accumulateur doté d'un conduit d'air de refroidissement
US11811037B2 (en) 2019-11-19 2023-11-07 Andreas Stihl Ag & Co. Kg Battery-operated working apparatus having a cooling air guide

Also Published As

Publication number Publication date
DE102011077485A1 (de) 2012-12-20
EP2535149A3 (fr) 2014-10-01

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