EP1491290A1 - Machine-outil portative - Google Patents

Machine-outil portative Download PDF

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Publication number
EP1491290A1
EP1491290A1 EP04014048A EP04014048A EP1491290A1 EP 1491290 A1 EP1491290 A1 EP 1491290A1 EP 04014048 A EP04014048 A EP 04014048A EP 04014048 A EP04014048 A EP 04014048A EP 1491290 A1 EP1491290 A1 EP 1491290A1
Authority
EP
European Patent Office
Prior art keywords
cooling air
air flow
tool according
housing
hand
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Withdrawn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
EP04014048A
Other languages
German (de)
English (en)
Inventor
Hans-Peter Albrecht
Martin Gseller
Paul Zimmermann
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.)
Festool GmbH
Original Assignee
Festool 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 Festool GmbH filed Critical Festool GmbH
Publication of EP1491290A1 publication Critical patent/EP1491290A1/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Withdrawn legal-status Critical Current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
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided

Definitions

  • the invention relates to an electric hand machine tool with an electric drive arranged within a housing and a first cooling device for cooling the drive by a first cooling air flow.
  • Such electrical hand machine tools can be, for example, orbital sanders, rotary sanders, jigsaws or the like.
  • the cooling device contains, for example, a fan wheel, which is arranged on an output shaft of the drive and generates the cooling air flow. The cooling air flow prevents the drive from overheating, especially when it is under heavy load.
  • the cooling air flow is strongly heated by the drive and leads to the heating of the housing.
  • the housing of the handheld power tool can become so hot in places that it can no longer be touched by an operator. At the very least, working with a very warm, sometimes hot, handheld power tool is uncomfortable, which affects the operator and can lead to poorer work results.
  • the electric hand power tool has a second cooling device for cooling at least a region of the housing surface of the housing by means of a second cooling air flow, and that within the housing the first cooling air flow from the second cooling air Electricity is carried separately.
  • the second cooling air flow is significantly cooler than the first cooling air flow heated by the drive, so that the housing can be cooled to a comfortable temperature by the second cooling air flow.
  • the second cooling air flow is generated, for example, by a fan wheel. It is also possible for the second cooling air flow to be generated by a suction device for suctioning dust or the like.
  • the hand-held power tool according to the invention is expediently a hand-held power tool that is operated in continuous operation, ie in longer operating sections.
  • the hand tool can be, for example, a hand grinder, a milling machine, a jigsaw or the like.
  • a hand grinder for example, a hand grinder, a milling machine, a jigsaw or the like.
  • several variants are preferred, for example an embodiment as a rotary grinder, as an orbital sander, as a delta sander with a triangular-shaped sanding foot, as an eccentric sander, as a belt sander or the like.
  • An embodiment as a rotary polisher or the like is also possible.
  • the area of the housing surface cooled by the second cooling air flow expediently forms a first handle for operating the handheld power tool.
  • this area is designed as a handle surface, as a handle or the like.
  • the handle surface serves e.g. for exerting pressure on a tool or the like driven by the hand power tool.
  • the tool is, for example, a grinding plate, grinding shoe, drill, saw or the like.
  • the two cooling devices expediently contain fan wheels.
  • the fan wheel of the first and the fan wheel of the second cooling device are advantageously arranged on an output shaft of the electric drive. It is also possible for only one of the fan wheels to be arranged on the output shaft.
  • the second cooling device is designed to form a dust extraction flow for extracting dust.
  • the second cooling air flow serves at least partially to remove dust.
  • the dust is e.g. caused by a tool driven by the electric drive.
  • the dust extraction stream can also be generated in whole or in part by an external device, for example a dust extraction device or the like.
  • an external device for example a dust extraction device or the like.
  • a preferred variant of the invention provides that the second cooling air flow is combined with the dust extraction flow within the housing a housing outlet is guided. At this housing outlet there is, for example, a connection piece for a dust extraction device.
  • a dust extraction flow generated by the dust extraction device could in principle lead to the tool being sucked onto the machined workpiece.
  • the second cooling air flow prevents seizing by at least partially reducing the suction effect of the dust extraction flow.
  • connection piece to which the dust extraction flow is guided, can also be used to connect a filter bag.
  • the dust extraction stream is expediently conducted within a dust extraction hood or dust extraction bell.
  • the second cooling air flow is also expediently guided, at least in part, within such a dust extraction hood. For example, there is an inflow opening for the second cooling air flow at the top of the dust extraction hood.
  • the dust extraction hood is expediently in flow connection with dust suction openings of a tool which can be driven by the electric drive.
  • the dust suction openings are, for example, passage openings.
  • the dust extraction hood is arranged above the tool, for example.
  • the dust extraction hood is to separate the first and second cooling air streams.
  • the first cooling air flow is, for example, on the outside of the dust extraction hood past.
  • the dust extraction hood expediently serves as a heat sink for transferring waste heat to the second cooling air stream.
  • the dust extraction hood consists, for example, of a material with a large heat capacity, for example of aluminum or another metal.
  • the handheld power tool advantageously has a gear that can be driven by the electric drive.
  • the transmission can, for example, change the speed ratio between the output shaft of the drive and the driven tool. Furthermore, it can convert a rotational movement into an eccentric movement, superimpose a rotational movement on an eccentric movement, or the like.
  • the gear can also be provided for a reversal of the direction of rotation.
  • the second cooling air flow expediently serves to cool the transmission.
  • the fan wheel of the second cooling device can be driven by the gear.
  • the fan wheel forms part of the transmission, for example.
  • the aforementioned dust extraction hood can also be arranged on the gear.
  • the first cooling air flow expediently also has a cooling function for the housing, at least in sections.
  • the first cooling air flow is conducted, for example, between a second area of the housing surface and the electric drive.
  • the first stream of cooling air can cool the surface of the housing at least until it is heated by the drive.
  • This second area of the housing surface preferably serves as a second handle for operating the tool. It is designed, for example, as a handle, as a grip surface or the like.
  • the housing regions of the handheld power tool cooled by the first and the second cooling air flow are expediently arranged at an angle to one another, for example at right angles.
  • the first handle is assigned to a tool axis and the second handle is assigned to a drive axis, so that the operator can exert forces to guide the handheld power tool in different directions.
  • the housing For the first cooling air stream heated by the electric drive, there are preferably outflow openings in a region of the housing which is remote from operator intervention during operation of the hand power tool. This prevents heated, possibly even hot air from flowing past the hands of the operator when the operator is using the handheld power tool.
  • a handheld power tool 10 shown in FIGS. 1 to 4 is cooled in the manner according to the invention by a first and a second cooling air flow 11, 12.
  • the first cooling air flow 11 is shown in the figure with thin arrows, the second cooling air flow 12 with thick arrows. Portions of the cooling air flows 11, 12 also running within a housing 13 of the handheld power tool 10 are partially shown with solid lines for reasons of illustration.
  • the housing 13 is made of plastic, for example.
  • the housing 13 contains e.g. two shells screwed together and / or put together or connected in any other way. In the illustration according to FIG. 1, a housing part facing the viewer is removed.
  • the handheld power tool 10 is, for example, a rotary grinding machine with a grinding plate 14.
  • the grinding plate 14 is driven by an electric drive 15, for example a universal motor or another electric motor, via a gear 16.
  • the Gear 16 can be switched by means of a switch 17.
  • a polishing plate or another tool could also be arranged on the handheld power tool 10.
  • the following description of the cooling of the housing 13 according to the invention relates to the hand-held power tool 10.
  • other hand-held power tools could also be cooled in the manner according to the invention, for example orbital sanders or jigsaws.
  • the handheld power tool 10 has an excellent ergonomic quality.
  • An important aspect here is that it is pleasant to the touch even in continuous operation because the housing 13 is heated relatively little, particularly in the areas in which it is touched by an operator.
  • large areas of the housing 13 are designed as handle surfaces or handles, so that it is easy to guide when machining workpieces, for example when grinding a schematically represented workpiece 18.
  • the gear 16 is arranged in a front part 19 of the housing 13, above the grinding plate 14.
  • the upper and the front area of the section 19 are designed as a grip surface 20, ie as a first handle for operating the handheld power tool 10.
  • An operator's hand lies essentially flat on the grip surface 20. The hand finds a hold in a recessed grip 21 in the lower region of the front part 19, near the grinding plate 14.
  • An upper longitudinal section 22 of the housing 13 adjoins the front section 19.
  • the sections 19 and 22 are arranged at an angle to one another, for example essentially at right angles.
  • the upper longitudinal section 22 forms a handle 23, ie a second handle for operating the handheld power tool 10.
  • the handle 23 can be gripped by one hand of an operator.
  • the grip surface 20 essentially serves to exert a compressive force in the direction of a workpiece to be machined, for example the workpiece 18.
  • the handle 23, on the other hand, is preferably suitable for guiding the handheld power tool 10 in the longitudinal and transverse directions, i.e. for exerting a force transversely to the pressure force to be exerted on the grinding plate 14 by means of the handle surface 20.
  • the handheld power tool 10 is preferably used with both hands using the handle surface 20 and Handle 23 operated. However, one-handed operation on the handle surface 20 or the handle 23 is also possible.
  • An exhaust air duct 24 runs opposite the handle 23 in an exhaust air duct part 26 of the housing 13.
  • the exhaust air duct part 26 adjoins the front part 19. Dust-laden exhaust air can flow through the exhaust air duct 24 from the front area of the hand power tool 10 to the rear to an exhaust air outlet 25.
  • the arrangement of the exhaust duct section 26 with respect to the handle 23 has the advantageous effect that a hand gripping the handle 23 is protected towards the workpiece 18 to be machined.
  • a rear section 27 of the housing 13 connects the exhaust duct section 26 to the upper longitudinal section 22, which leads to stability of the housing 13 contributes.
  • the parts 19, 22, 26 and 27 enclose in the manner of a ring a passage opening 28 which can be reached through by an operator's hand when gripping the handle 23.
  • a first cooling device 30 serves to cool the drive 15 by means of the first cooling air flow 11.
  • the cooling device 30 contains a fan wheel 32 which is driven by a drive shaft 33 of the drive 15.
  • the drive shaft 33 penetrates the fan wheel 32 and drives the gear 16.
  • the first cooling device 30 also contains a first cooling channel 34 which runs in the housing 13.
  • the first cooling duct 34 runs essentially in the upper longitudinal section 22 and the rear area of the front section 19 of the housing 13 facing the through opening 28. Partitions 35, 36 in the interior of the housing 13 delimit the cooling duct 34.
  • the partition 35 separates the cooling duct 34 from the exhaust air duct 24.
  • the partition wall 36 penetrated by the drive shaft 33 and a suction hood 37 described later in detail above the grinding plate 14 separate the first cooling duct 34 from the area of the housing 13 forming the grip surface 20.
  • the first one heated by the drive 15 thus heats up Cooling air flow 11 does not include large parts of the front section 19, in particular the grip surface 20.
  • the cooling air flow 11 is at least partially generated by the fan wheel 32.
  • the cooling air flow 11 flows through inflow openings 38, which can also be referred to as ventilation slots, into the housing 13 at the rear part 27.
  • the cooling air flow 11 flows past the drive 15 and / or flows through the drive 15, cools the drive 15 and heats up. However, the cooling air flow 11 is still so cool on the upstream side, ie in the rear region of the longitudinal part 22 facing the part 27, that it cools the surface of the housing 13 in the region of the handle 23.
  • the cooling air flow 11 is already relatively warm. For example, it can reach temperatures of around 50 ° C to 60 ° C.
  • the housing 13 expediently has a narrowed cross section, which is essentially filled by the fan wheel 32, so that the fan wheel 32 develops an optimal suction effect.
  • the fan wheel 32 conveys the cooling air flow 11 to outflow openings 39.
  • the outflow openings 39 are arranged at the bottom on the front part 19 of the housing 13.
  • the outflow openings 39 are located near the grinding plate 14, away from the hands of an operator when using the handheld power tool 10.
  • An advantageous effect of the cooling air flow 11 blown out through the outflow openings 39 near the grinding plate 14 is that it may be on the workpiece 18 dust is blown away.
  • the openings 38, 39 can be arranged on one side or on both sides of the housing 13. Depending on the desired cooling effect, the cooling wheel 32 or the openings 38, 39 can be dimensioned larger or smaller.
  • a second cooling device 50 cools the handle surface 20. It thus contributes significantly to the ease of use of the hand tool 10.
  • a fan wheel 52 driven by the gear 16 partially generates the second cooling air flow 12, which is separated from the first cooling air flow 11 within the housing by the partition walls 35, 36 and the suction hood 37 13 is performed.
  • the fan wheel 52 is expediently driven by a comparatively slowly rotating part of the transmission 16 which is not visible in the figure.
  • the cooling air flow 12 is drawn in by the fan wheel 52 through inflow openings 53.
  • the inflow openings 53 are arranged laterally on the housing 13, for example.
  • the inflow openings 53 are preferably located outside an area of the handle surface 20 that is typically covered by an operator's hand.
  • the inside of the hand of an operator's hand lies on top of the front part 19, so that the inflow openings 53 located below remain free and the cooling air flow 12 can flow into the housing 13.
  • the cooling air flow 12 flows along the inside of the housing 13 opposite the grip surface 20 and cools it down.
  • the cooling air flow is conveyed into the suction hood 37 by the fan wheel 52 through an opening 37.
  • the cooling air flow 12 flows through an outflow opening 54 of the suction hood 37 backwards into the exhaust air duct 24.
  • the cooling air flow 12 leaves the exhaust air duct 24 through the exhaust air outlet 25.
  • the outer contour of the outflow opening 54 is preferably seated in the exhaust air duct 24 so tightly that the first cooling duct 34 is essentially separated from the exhaust air duct.
  • a partition 55 of the housing 13 can rest against the outflow opening 54.
  • the second cooling air flow 12 flows through a second cooling duct 56 from the inflow openings 53 to the exhaust air outlet 25.
  • the suction hood 37 contributes to the separation of the first cooling duct 34 from the second cooling duct 56.
  • the first cooling duct 34 runs outside the suction hood 37, the second cooling duct 56 partly inside the suction hood 37.
  • the second cooling air flow 12 flows through the opening 57 at the top of the suction hood 37.
  • the opening 57 faces the inflow openings 53 on the housing 13 ,
  • the suction hood 37 also serves as a heat sink of the transmission 16 in order to deliver waste heat from the transmission 16 to the first and second cooling air streams 11, 12.
  • the suction hood 37 serves to extract dust from the surface of the workpiece 18.
  • the grinding of the workpiece 18 with an abrasive arranged on the underside of the grinding plate 14 produces dust.
  • This dust is extracted from the surface of the workpiece 18 through openings 61 on the grinding means 60 or grinding plate 14 with the aid of a dust extraction stream 62.
  • a circumferential, annular seal 69 is expediently arranged between the underside of the suction hood 37 and the upper side of the grinding plate 14.
  • the dust extraction flow 62 is channeled through the suction hood 37 to the outflow opening 54.
  • a dust extraction device 63 is provided which can be connected to the hand power tool 10 and is connected, for example by means of a hose 64, to a connection piece 65 containing the exhaust air outlet 25. Ribs or other holding devices can be arranged on the outside on the connecting piece 65 in order to be able to reliably fasten the hose 64.
  • the dust extraction stream 62 combines in the suction hood 37 with the second cooling air stream 12 and flows through the exhaust air duct 24 to the exhaust air outlet 25.
  • the dust suction stream thus carries 62 for cooling the hand tool 10. It is also possible for the dust extraction device 63 to generate the second cooling air flow 12 completely or at least partially. Accordingly, an embodiment of handheld power tool 10 could also be provided in which, for example, there is no fan wheel 52.
  • the opening 57 on the top of the suction hood 37 prevents the grinding plate 14 from, as it were, sucking onto the workpiece 18.
  • the negative pressure on the underside of the grinding plate 14 can be influenced by the dimensioning of the opening 57.
  • the drive 15 is supplied with power via a line 66 led out of the housing 13 at the rear.
  • a power supply by means of batteries, accumulators or the like could also be provided.
  • the drive 15 can be switched on and off by a switch 67 which is arranged in the region of the handle surface 20.
  • FIG. 4 particularly strongly heated zones of the housing 13 are indicated on the basis of a schematically represented, hatched area 70. It can be seen from FIG. 4 that the handle 23 and the handle surface 20 are kept cool ergonomically within the housing 13 by the optimized cooling air guidance.
  • the partition 36 is angular, for example.
  • a first leg extends in the longitudinal direction of the handheld power tool 10, approximately above the grinding plate 14.
  • a second leg which is penetrated in the upper area by the drive shaft 33, is oriented obliquely upwards.
  • the second leg is arranged near the through opening 28, so that the first cooling channel 34 is relatively narrow, while the handle surface 20 is large.
  • the partition 36 bears on the outside of the suction hood 37.
  • the handheld power tool 10 is shown partially schematically in FIGS. 1 to 4.
  • the housing 13 can have, for example, stabilizing ribs, holding devices for the internal components, for example the drive 15 and the gear 16 or the like.
  • the stator of the drive 15 can rest on the wall of the upper longitudinal section 22.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP04014048A 2003-06-27 2004-06-16 Machine-outil portative Withdrawn EP1491290A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10329828 2003-06-27
DE2003129828 DE10329828B4 (de) 2003-06-27 2003-06-27 Handwerkzeugmaschine mit Kühlvorrichtung und Staubabsaugung

Publications (1)

Publication Number Publication Date
EP1491290A1 true EP1491290A1 (fr) 2004-12-29

Family

ID=33395060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04014048A Withdrawn EP1491290A1 (fr) 2003-06-27 2004-06-16 Machine-outil portative

Country Status (2)

Country Link
EP (1) EP1491290A1 (fr)
DE (1) DE10329828B4 (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
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GB2423272A (en) * 2005-02-18 2006-08-23 Bosch Gmbh Robert Electric power tool with heat sink
WO2008000544A1 (fr) * 2006-06-28 2008-01-03 Robert Bosch Gmbh Outil électroportatif muni d'un arrangement de refroidissement
EP1925401A1 (fr) * 2006-11-22 2008-05-28 Festool GmbH Meuleuse portative à moteur avec mécanisme d'aspiration réglable
JP2008264935A (ja) * 2007-04-20 2008-11-06 Makita Corp 手持ち工具のハンドル
EP2000265A1 (fr) * 2007-06-07 2008-12-10 Makita Corporation Outils électriques
JP2009518192A (ja) * 2005-12-07 2009-05-07 アトラス・コプコ・ツールス・アクチボラグ 空冷システムを備える携帯型電動グラインダー
WO2009112099A1 (fr) * 2008-03-12 2009-09-17 Robert Bosch Gmbh Machine-outil électroportative
CN101559588A (zh) * 2008-04-18 2009-10-21 罗伯特·博世有限公司 手持式工具机
GB2459191A (en) * 2008-04-18 2009-10-21 Bosch Gmbh Robert Hand-held power tool with additional air inflow opening
WO2012019816A1 (fr) * 2010-08-10 2012-02-16 Robert Bosch Gmbh Appareil de traitement de surface, notamment ponceuse, appareil de polissage ou similaire
EP2564992A1 (fr) * 2011-09-02 2013-03-06 M.B.H. Developpement Dispositif à moteur électrique avec circuit de refroidissement intégré pour la commande d'outils
CN104245237A (zh) * 2012-04-24 2014-12-24 C.&E.泛音有限公司 带有通风装置的手持式工具机
FR3014721A1 (fr) * 2012-12-20 2015-06-19 Bosch Gmbh Robert Machine-outil a main
EP2923802A1 (fr) * 2014-03-25 2015-09-30 HILTI Aktiengesellschaft Refroidissement de courroie
US20150306719A1 (en) * 2014-04-25 2015-10-29 Robert Bosch Gmbh Power-Tool Cooling Apparatus
WO2016062492A1 (fr) * 2014-10-20 2016-04-28 Robert Bosch Gmbh Machine-outil portative pourvue d'un porte-outil sds

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DE102006016480A1 (de) * 2006-04-07 2007-10-11 Metabowerke Gmbh Elektrohandschleifmaschine
DE102007039828B3 (de) * 2007-08-23 2008-11-20 Robert Bosch Gmbh Elektrohandwerkzeugmaschine mit einem Lüfter und einem Akku
DE102009054811B4 (de) * 2009-12-17 2021-06-17 Robert Bosch Gmbh Handwerkzeugmaschine
DE102009055411B4 (de) 2009-12-30 2023-06-01 Robert Bosch Gmbh Handwerkzeugmaschinenvorrichtung mit einer Spanblasvorrichtung
DE102010045994A1 (de) * 2010-09-18 2012-03-22 Andreas Stihl Ag & Co. Kg Handgeführtes Arbeitsgerät
DE102011051938A1 (de) 2011-07-19 2013-01-24 Flex-Elektrowerkzeuge Gmbh Werkzeugaufnahmevorrichtung, Werkzeugaufnahmevorrichtung-Werkzeug-Kombination und Werkzeugmaschine
DE102012001925A1 (de) * 2012-02-02 2013-08-08 Schleif- und Fräswerkzeuge Höhn Ltd. & Co. KG Oberflächenschleifer, insbesondere Betonschleifer
DE102013203617B4 (de) 2013-03-04 2023-12-14 Robert Bosch Gmbh Handwerkzeugmaschine
DE102020215737A1 (de) 2020-12-11 2022-06-15 Flex-Elektrowerkzeuge Gmbh Werkzeugmaschine

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US5419737A (en) * 1993-10-28 1995-05-30 Ryobi Motor Products Corp. Random orbital sanding machine having a removable debris container
EP0794038A2 (fr) * 1996-01-08 1997-09-10 Kress-elektrik GmbH + Co. Elektromotorenfabrik Outil à main avec un arrangement de refroidissement
US6127751A (en) * 1998-09-02 2000-10-03 Hilti Aktiengesellschaft Electric tool
WO2002034462A1 (fr) * 2000-10-28 2002-05-02 Robert Bosch Gmbh Outil a main comportant un dispositif d'aspiration des poussieres

Cited By (30)

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Publication number Priority date Publication date Assignee Title
US8087475B2 (en) 2005-02-18 2012-01-03 Robert Bosch Gmbh Electrical power tool
GB2423272B (en) * 2005-02-18 2007-04-18 Bosch Gmbh Robert Electric power tool
GB2423272A (en) * 2005-02-18 2006-08-23 Bosch Gmbh Robert Electric power tool with heat sink
JP2009518192A (ja) * 2005-12-07 2009-05-07 アトラス・コプコ・ツールス・アクチボラグ 空冷システムを備える携帯型電動グラインダー
WO2008000544A1 (fr) * 2006-06-28 2008-01-03 Robert Bosch Gmbh Outil électroportatif muni d'un arrangement de refroidissement
EP1925401A1 (fr) * 2006-11-22 2008-05-28 Festool GmbH Meuleuse portative à moteur avec mécanisme d'aspiration réglable
JP2008264935A (ja) * 2007-04-20 2008-11-06 Makita Corp 手持ち工具のハンドル
US8123596B2 (en) 2007-06-07 2012-02-28 Makita Corporation Power tools
EP2000265A1 (fr) * 2007-06-07 2008-12-10 Makita Corporation Outils électriques
WO2009112099A1 (fr) * 2008-03-12 2009-09-17 Robert Bosch Gmbh Machine-outil électroportative
CN101559588A (zh) * 2008-04-18 2009-10-21 罗伯特·博世有限公司 手持式工具机
GB2459191A (en) * 2008-04-18 2009-10-21 Bosch Gmbh Robert Hand-held power tool with additional air inflow opening
RU2510327C2 (ru) * 2008-04-18 2014-03-27 Роберт Бош Гмбх Ручная машина
GB2459191B (en) * 2008-04-18 2012-05-30 Bosch Gmbh Robert Hand-held power tool
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