WO2005039822A1 - Power tool - Google Patents

Power tool Download PDF

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Publication number
WO2005039822A1
WO2005039822A1 PCT/DE2004/002129 DE2004002129W WO2005039822A1 WO 2005039822 A1 WO2005039822 A1 WO 2005039822A1 DE 2004002129 W DE2004002129 W DE 2004002129W WO 2005039822 A1 WO2005039822 A1 WO 2005039822A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
cooling
power tool
tool according
air
Prior art date
Application number
PCT/DE2004/002129
Other languages
German (de)
French (fr)
Inventor
Peter Stierle
Juergen Wiker
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to EP04786845A priority Critical patent/EP1677946B1/en
Priority to US10/550,047 priority patent/US7597157B2/en
Priority to DE502004011078T priority patent/DE502004011078D1/en
Priority to CN2004800300621A priority patent/CN1867421B/en
Publication of WO2005039822A1 publication Critical patent/WO2005039822A1/en

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Classifications

    • 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
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028—Angle tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/008—Cooling means

Definitions

  • the invention relates to an electric machine tool according to the preamble of claim 1.
  • the cooling air required to cool the electric motor is usually sucked in through side air inlet openings, which are located in the rear part of the housing. It is also known to additionally provide air inlet openings on a rear end face of the housing. With conventional air routing, the cooling air is drawn into the interior of the housing by a fan located on the armature shaft. On the way from the air inlet to the air outlet, the cooling air inside the housing encounters various components that divert, swirl and slow down the air flow.
  • the housing can be used as a handle, but there is a risk that the side air intake openings can be used by the user. cover and suck in air only through the front air inlet openings. However, these are relatively small in relation to the side openings, so that only a little air can get into the housing. However, the side air inlet openings cannot be extended or enlarged arbitrarily, as otherwise the necessary distances to live parts inside the housing cannot be maintained.
  • the invention relates to an electric machine tool with an electric motor arranged in a housing and a cooling device.
  • the cooling device has, at least in some areas, a cooling channel that is essentially closed with respect to an interior of the housing.
  • the cooling medium preferably cooling air
  • the cooling medium can be directed past disruptive components. A high flow rate and a high volume throughput can be achieved. Any dirt drawn into the cooling air can be guided past sensitive parts, such as brushes or switches, and dirt can be prevented from being deposited thereon.
  • sensitive parts such as brushes or switches
  • dirt can be prevented from being deposited thereon.
  • An essentially closed cooling duct should in particular also be understood to mean cooling ducts which are nisch at least largely negligible recesses, such as slots, small holes, etc.
  • cooling duct is embedded in a support plate of a motor housing, this can be provided inexpensively during the manufacture of the support plate and can be introduced into the support plate in a space-saving and optimized manner.
  • cooling duct is covered with a cover plate, a closed cooling duct can be provided in which the
  • Coolant can flow undisturbed by components inside the housing.
  • the cooling duct can be easily cleaned if necessary by removing the cover plate.
  • cover plate is made in one piece with a motor housing, there is no need for a separate cover plate.
  • the production is particularly simple, and in the case of a motor housing produced by means of injection molding, the cover plate can simply be molded on.
  • cooling duct opens into an intake socket protruding from the housing, it is practically impossible that it will be accidentally covered when working with the power tool.
  • cooling air gets directly into the cooling duct and can be led directly to where it is needed.
  • the cross section of the cooling channel is variable and is provided by the person skilled in the art in accordance with the requirements of the individual power tool. In principle, however, it is also conceivable that the cooling duct or an intake manifold ends flush with the housing, in particular in areas outside of a grip area, whereby dirt deposits can advantageously be avoided.
  • the cooling duct can be supplied with cooling air without hindrance, even if the housing serves as a handle.
  • the cooling duct If the cooling duct is guided essentially in a straight line, the cooling air reaches the electric motor unhindered, without being hindered by components that stand in the way of the flow. There are fewer vortices in the flow path, so that any entrained dirt can deposit less and a high speed of the cooling medium can be maintained. Smaller inlet openings can be provided in order to be able to provide a required quantity of cooling medium.
  • the coolant supply can be better distributed.
  • the number of cooling channels is variable and is selected by the person skilled in the art in accordance with the requirements of the individual power tool. In principle, however, it is also conceivable that only one cooling channel is provided.
  • components can also be cooled inside the housing without affecting the cooling of the electric motor.
  • Angle grinder designed, which is inherently light
  • the drive can be overloaded, which requires particularly reliable cooling.
  • FIG. 1 shows a preferred angle grinder
  • FIG. 2 shows details of a housing according to the prior art
  • FIG. 3 shows details of an air duct according to the prior art
  • FIG. 4 shows a view of a carrier plate with cooling channels according to the invention
  • FIG. 5 shows the cooling channels from FIG. 4 with cover plate
  • FIG. 6 shows the arrangement from FIG. 5 with the switch installed
  • FIG. 7 shows a section of a completely assembled housing with intake manifold. Description of the embodiment
  • FIG. 1 shows an electric machine tool in the form of a preferred angle grinder with an electric motor arranged in a housing 10 and a cooling device in which an intake connector 20 is arranged on the rear end face of the housing 10.
  • the angle grinder can additionally have a handle that protrudes at an angle from the housing 10.
  • the housing 10 itself is also used as a handle.
  • the electric motor preferably drives an insert tool 12 which can be driven in rotation, such as a grinding wheel.
  • Fig. 2 and Fig. 3 illustrate a cooling air guide according to the prior art. Identical parts are generally numbered with the same reference symbols in the figures.
  • the housing 10 is cut open in order to clarify the conditions inside the housing 10. Air sucked in by a fan (not shown) flows through side and front air inlet openings 18, 16 into the housing 10. The side air inlet openings 18 can be provided on both sides of the housing 10. After entering the housing 10, the cooling air encounters components, such as switches 22 and electronics 24, which in themselves require little or no cooling. When these components 22, 24 flow past, vortices are created which brake the cooling air and ensure that dirt that is carried along is deposited there.
  • the thick arrows in the figures FIGS.
  • FIGS. 4 to 7 The arrangement according to the invention is shown in the following FIGS. 4 to 7.
  • a carrier plate 28 of the motor housing 26 two cooling channels 30 are let in, which lead essentially in a straight line from two intake ports 20 arranged in an end face 14 of the housing 10 to the motor housing 26 (FIG. 4).
  • the intake manifold 20 protrude from the housing 10.
  • the cooling channels 30 are covered with a cover plate 32 (FIG. 5), so that airtight cooling channels 30 are formed.
  • the cover plate 32 can be detachably or firmly connected to the edges of the cooling channels 30, for example glued, screwed or clamped onto the cooling channels 30.
  • the cover plate 32 can be formed from a single piece for all the cooling channels 30, or a separate cover plate 32 can be provided for each cooling channel 30.
  • FIG. 6 shows a switch 22 which is mounted in the housing on the cooling channels 30 or the cover plate 32.
  • the cooling air in the cooling channels 30 reaches the motor housing 26 without being influenced by the switch 22.
  • FIG. 7 shows a completely assembled housing 10 with additional front and side air inlet openings 16,
  • the intake manifold 20 for the closed cooling channels 30 in the interior of the housing 10 are arranged between a cable connection 34 and the air inlet openings 16 in the end face 14 of the housing 10.

Abstract

The invention relates to a power tool comprising an electric motor arranged in a housing (10) and a cooling device (16, 18, 20, 30, 32). According to the invention, the cooling device (16, 18, 20, 30, 32) comprises a cooling channel (30), at least in sections thereof, that is closed to the inside of the housing (10).

Description

Elektrowerkzeug aschinePower tool machine
Stand der TechnikState of the art
Die Erfindung geht aus von einer Elektrowerkzeugmaschine nach dem Oberbegriff des Anspruchs 1.The invention relates to an electric machine tool according to the preamble of claim 1.
Bei Winkelschleifern erfolgt das Ansaugen der zur Kühlung des Elektromotors benötigten Kühlluft in der Regel durch seitliche Lufteinlassöffnungen, welche sich im hinteren Teil des Gehäuses befinden. Es ist auch bekannt, zusätzlich Lufteinlassöffnungen an einer hinteren Stirnfläche des Gehäuses vorzusehen. Bei üblichen Luftführungen wird die Kühlluft durch einen auf der Ankerwelle befindlichen Lüfter in das Innere des Gehäuses gesaugt. Auf dem Weg vom Lufteinlass bis zum Luftauslass trifft die Kühlluft im Inneren des Gehäuses auf diverse Komponenten, die den Luftstrom umlenken, verwirbeln und verlangsamen.In the case of angle grinders, the cooling air required to cool the electric motor is usually sucked in through side air inlet openings, which are located in the rear part of the housing. It is also known to additionally provide air inlet openings on a rear end face of the housing. With conventional air routing, the cooling air is drawn into the interior of the housing by a fan located on the armature shaft. On the way from the air inlet to the air outlet, the cooling air inside the housing encounters various components that divert, swirl and slow down the air flow.
Bei verschiedenen Elektrowerkzeugmaschinen kann das Gehäuse als Handgriff genutzt werden, wobei jedoch die Gefahr droht, die seitlichen Lufteinlassöffnungen mit der Hand des Benut- zers abzudecken und Luft nur noch durch die stirnseitigen Lufteinlassöffnungen anzusaugen. Diese sind im Verhältnis zu den seitlichen Öffnungen jedoch relativ klein, so dass nur noch wenig Luft in das Gehäuse gelangen kann. Die seitlichen Lufteinlassöffnungen können jedoch nicht beliebig verlängert oder vergrößert werden, da sonst möglicherweise erforderliche Abstände zu Strom führenden Teilen im Innern des Gehäuses nicht eingehalten werden können.With various power tools, the housing can be used as a handle, but there is a risk that the side air intake openings can be used by the user. cover and suck in air only through the front air inlet openings. However, these are relatively small in relation to the side openings, so that only a little air can get into the housing. However, the side air inlet openings cannot be extended or enlarged arbitrarily, as otherwise the necessary distances to live parts inside the housing cannot be maintained.
Vorteile der ErfindungAdvantages of the invention
Die Erfindung geht aus von einer Elektrowerkzeugmaschine mit einem in einem Gehäuse angeordneten Elektromotor und einer Kühleinrichtung.The invention relates to an electric machine tool with an electric motor arranged in a housing and a cooling device.
Es wird vorgeschlagen, dass die Kühleinrichtung zumindest bereichsweise einen gegenüber einem Innenraum des Gehäuses im Wesentlichen geschlossenen Kühlkanal aufweist. Das Kühlmedi- um, vorzugsweise Kühlluft, kann gezielt an störenden Komponenten vorbeigeführt werden. Eine hohe Strömungsgeschwindigkeit und ein hoher Volumendurchsatz können erreicht werden. Etwaiger, in der Kühlluft angesaugter Schmutz kann an empfindlichen Teilen, wie Bürsten oder Schaltern, vorbeigeführt werden, und eine Ablagerung von Schmutz an denselben kann vermieden werden. Durch die gezielte Führung des Kühlmediums sinkt die Temperatur am Elektromotor, was dessen Wirkungsgrad und Lebensdauer erhöht. Gerade in Winkelschleifern, die hoch belastet werden, bietet diese Anordnung große Vorteile. Unter einem im Wesentlichen geschlossenen Kühlkanal sollen insbesondere auch Kühlkanäle verstanden werden, die strömungstech- nisch zumindest weitgehend zu vernachlässigende Ausnehmungen, wie Schlitze, kleine Löcher usw. aufweisen.It is proposed that the cooling device has, at least in some areas, a cooling channel that is essentially closed with respect to an interior of the housing. The cooling medium, preferably cooling air, can be directed past disruptive components. A high flow rate and a high volume throughput can be achieved. Any dirt drawn into the cooling air can be guided past sensitive parts, such as brushes or switches, and dirt can be prevented from being deposited thereon. Through the targeted guidance of the cooling medium, the temperature on the electric motor drops, which increases its efficiency and service life. This arrangement offers great advantages, particularly in angle grinders that are subject to high loads. An essentially closed cooling duct should in particular also be understood to mean cooling ducts which are nisch at least largely negligible recesses, such as slots, small holes, etc.
Ist der Kühlkanal in eine Trägerplatte eines Motorgehäuses eingelassen, lässt sich dieser günstig bereits bei der Herstellung der Trägerplatte vorsehen und in die Trägerplatte platzsparend und optimiert einbringen.If the cooling duct is embedded in a support plate of a motor housing, this can be provided inexpensively during the manufacture of the support plate and can be introduced into the support plate in a space-saving and optimized manner.
Ist der Kühlkanal mit einer Abdeckplatte abgedeckt, kann ein geschlossener Kühlkanal bereitgestellt werden, in dem dasIf the cooling duct is covered with a cover plate, a closed cooling duct can be provided in which the
Kühlmedium, ungestört von Komponenten im Inneren des Gehäuses, strömen kann. Durch Abnehmen der Abdeckplatte lässt sich der Kühlkanal bei Bedarf leicht reinigen.Coolant can flow undisturbed by components inside the housing. The cooling duct can be easily cleaned if necessary by removing the cover plate.
Ist die Abdeckplatte einstückig mit einem Motorgehäuse ausgeführt, kann auf eine separate Abdeckplatte verzichtet werden. Die Herstellung ist besonders einfach, und bei einem mittels Spritzguss hergestellten Motorgehäuse kann die Abdeckplatte einfach mit angespritzt werden.If the cover plate is made in one piece with a motor housing, there is no need for a separate cover plate. The production is particularly simple, and in the case of a motor housing produced by means of injection molding, the cover plate can simply be molded on.
Mündet der Kühlkanal in einen aus dem Gehäuse herausragenden Ansaugstutzen, ist es praktisch ausgeschlossen, dass dieser beim Arbeiten mit der Elektrowerkzeugmaschine versehentlich abgedeckt wird. Weiterhin gelangt Kühlluft direkt und unge- hindert in den Kühlkanal und kann unmittelbar dorthin geführt werden, wo sie benötigt wird. Der Querschnitt des Kühlkanals ist variabel und wird vom Fachmann jeweils nach den Erfordernissen der einzelnen Elektrowerkzeugmaschine vorgesehen. Grundsätzlich ist jedoch auch denkbar, dass der Kühlkanal o- der ein Ansaugstutzen bündig mit dem Gehäuse abschließt, und zwar insbesondere in Bereichen außerhalb eines Griffbereichs, wodurch Schmutzablagerungsstellen vorteilhaft vermieden werden können.If the cooling duct opens into an intake socket protruding from the housing, it is practically impossible that it will be accidentally covered when working with the power tool. In addition, cooling air gets directly into the cooling duct and can be led directly to where it is needed. The cross section of the cooling channel is variable and is provided by the person skilled in the art in accordance with the requirements of the individual power tool. In principle, however, it is also conceivable that the cooling duct or an intake manifold ends flush with the housing, in particular in areas outside of a grip area, whereby dirt deposits can advantageously be avoided.
Ist der Ansaugstutzen in einer Stirnseite des Gehäuses ange- ordnet, kann der Kühlkanal ungehindert mit Kühlluft versorgt werden, auch wenn das Gehäuse als Handgriff dient.If the intake manifold is arranged in one end of the housing, the cooling duct can be supplied with cooling air without hindrance, even if the housing serves as a handle.
Ist der Kühlkanal im Wesentlichen geradlinig geführt, gelangt die Kühlluft ungehindert zum Elektromotor, ohne von Bauteilen behindert zu werden, die der Strömung im Weg stehen. Es entstehen weniger Wirbel im Strömungsweg, so dass etwaiger mitgeführter Schmutz sich weniger ablagern kann und eine hohe Geschwindigkeit des Kühlmediums beibehalten werden kann. Es können kleinere Einlassöffnungen vorgesehen werden, um eine erforderliche Kühlmedienmenge zur Verfügung stellen zu können.If the cooling duct is guided essentially in a straight line, the cooling air reaches the electric motor unhindered, without being hindered by components that stand in the way of the flow. There are fewer vortices in the flow path, so that any entrained dirt can deposit less and a high speed of the cooling medium can be maintained. Smaller inlet openings can be provided in order to be able to provide a required quantity of cooling medium.
Sind zumindest zwei Kühlkanäle vorgesehen, kann eine bessere Verteilung der Kühlmittelzufuhr erfolgen. Die Anzahl der Kühlkanäle ist variabel und wird vom Fachmann jeweils nach den Erfordernissen der einzelnen Elektrowerkzeugmaschine ausgewählt. Grundsätzlich ist jedoch auch denkbar, dass nur ein Kühlkanal vorgesehen ist.If at least two cooling channels are provided, the coolant supply can be better distributed. The number of cooling channels is variable and is selected by the person skilled in the art in accordance with the requirements of the individual power tool. In principle, however, it is also conceivable that only one cooling channel is provided.
Sind seitliche und/oder stirnseitige Lufteinlasskanäle vorgesehen, kann zusätzlich auch eine Kühlung von Komponenten im Innern des Gehäuses erfolgen, ohne die Kühlung des Elektromotors zu beeinträchtigen.If side and / or front air inlet ducts are provided, components can also be cooled inside the housing without affecting the cooling of the electric motor.
Besonders vorteilhaft ist die Elektrowerkzeugmaschine alsThe electric machine tool is particularly advantageous as
Winkelschleifer ausgebildet, bei dem es prinzipbedingt leicht zu einer Überlastung des Antriebs kommen kann, was eine besonders zuverlässige Kühlung erfordert.Angle grinder designed, which is inherently light The drive can be overloaded, which requires particularly reliable cooling.
Zeichnungdrawing
Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination.Further advantages result from the following description of the drawing. In the drawing, an embodiment of the invention is shown. The drawing, the description and the claims contain numerous features in combination.
Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.The person skilled in the art will expediently also consider the features individually and combine them into useful further combinations.
Es zeigen:Show it:
Fig. 1 einen bevorzugten Winkelschleifer, Fig. 2 Details eines Gehäuses nach dem Stand der Technik, Fig. 3 Details einer Luftführung nach dem Stand der Technik, Fig. 4 eine Ansicht einer Trägerplatte mit erfindungsgemäßen Kühlkanälen, Fig. 5 die Kühlkanäle aus Fig. 4 mit Abdeckplatte, Fig. 6 die Anordnung aus Fig. 5 mit montiertem Schalter, Fig. 7 einen Ausschnitt eines fertig montierten Gehäuses mit Ansaugstutzen. Beschreibung des Ausführungsbeispiels1 shows a preferred angle grinder, FIG. 2 shows details of a housing according to the prior art, FIG. 3 shows details of an air duct according to the prior art, FIG. 4 shows a view of a carrier plate with cooling channels according to the invention, FIG. 5 shows the cooling channels from FIG. 4 with cover plate, FIG. 6 shows the arrangement from FIG. 5 with the switch installed, FIG. 7 shows a section of a completely assembled housing with intake manifold. Description of the embodiment
Fig. 1 zeigt eine Elektrowerkzeugmaschine in Form eines bevorzugten Winkelschleifers mit einem in einem Gehäuse 10 an- geordneten Elektromotor und einer Kühleinrichtung, bei der ein Ansaugstutzen 20 auf der hinteren Stirnseite des Gehäuses 10 angeordnet ist. Der Winkelschleifer kann zusätzlich einen winklig vom Gehäuse 10 abstehenden Handgriff aufweisen. Das Gehäuse 10 selbst wird ebenfalls als Handgriff eingesetzt. Der Elektromotor treibt vorzugsweise ein rotierend antreibbares Einsatzwerkzeug 12, etwa eine Schleifscheibe, an.1 shows an electric machine tool in the form of a preferred angle grinder with an electric motor arranged in a housing 10 and a cooling device in which an intake connector 20 is arranged on the rear end face of the housing 10. The angle grinder can additionally have a handle that protrudes at an angle from the housing 10. The housing 10 itself is also used as a handle. The electric motor preferably drives an insert tool 12 which can be driven in rotation, such as a grinding wheel.
Fig. 2 und Fig. 3 verdeutlichen eine Kühlluftführung nach dem Stand der Technik. Gleiche Teile sind in den Figuren grund- sätzlich mit gleichen Bezugszeichen beziffert. Das Gehäuse 10 ist aufgeschnitten, um die Verhältnisse im Innern des Gehäuses 10 zu verdeutlichen. Durch einen nicht dargestellten Lüfter angesaugte Luft strömt durch seitliche und stirnseitige Lufteinlassöffnungen 18, 16 in das Gehäuse 10. Die seitlichen Lufteinlassöffnungen 18 können auf beiden Seiten des Gehäuses 10 vorgesehen sein. Die Kühlluft trifft nach dem Eintritt in das Gehäuse 10 auf Komponenten, wie Schalter 22 und Elektronik 24, die an sich keine oder nur eine geringfügige Kühlung benötigen. Beim Vorbeiströmen an diesen Komponenten 22, 24 entstehen Wirbel, welche die Kühlluft abbremsen und dafür sorgen, dass sich mitgeführter Schmutz dort ablagert. Die dicken Pfeile in den Figuren (Fig. 2 und Fig. 3) sollen verdeutlichen, dass nach dem Eintritt der Kühlluft erst Hindernisse in Form der Komponenten 22, 24 umströmt werden müssen, bevor die Kühlluft ins Innere eines Motorgehäuses 26 gelangt, wo sie zur Kühlung von Anker und Polschuh des Elektromotors benötigt wird.Fig. 2 and Fig. 3 illustrate a cooling air guide according to the prior art. Identical parts are generally numbered with the same reference symbols in the figures. The housing 10 is cut open in order to clarify the conditions inside the housing 10. Air sucked in by a fan (not shown) flows through side and front air inlet openings 18, 16 into the housing 10. The side air inlet openings 18 can be provided on both sides of the housing 10. After entering the housing 10, the cooling air encounters components, such as switches 22 and electronics 24, which in themselves require little or no cooling. When these components 22, 24 flow past, vortices are created which brake the cooling air and ensure that dirt that is carried along is deposited there. The thick arrows in the figures (FIGS. 2 and 3) are intended to clarify that after the cooling air has entered, obstacles in the form of components 22, 24 first have to be flowed around before the cooling air reaches the interior of a motor housing 26, where it is needed to cool the armature and pole piece of the electric motor.
Die erfindungsgemäße Anordnung ist in den folgenden Figuren 4 bis 7 dargestellt. In eine Trägerplatte 28 des Motorgehäuses 26 sind zwei Kühlkanäle 30 eingelassen, die im Wesentlichen geradlinig von zwei in einer Stirnseite 14 des Gehäuses 10 angeordneten Ansaugstutzen 20 zum Motorgehäuse 26 führen (Fig. 4) . Die Ansaugstutzen 20 ragen aus dem Gehäuse 10 her- aus. Die Kühlkanäle 30 sind mit einer Abdeckplatte 32 abgedeckt (Fig. 5), so dass luftdichte Kühlkanäle 30 gebildet werden. Die Abdeckplatte 32 kann lösbar oder fest mit Rändern der Kühlkanäle 30 verbunden sein, beispielsweise auf die Kühlkanäle 30 geklebt, geschraubt oder geklemmt sein. Die Ab- deckplatte 32 kann für alle Kühlkanäle 30 aus einem einzigen Stück gebildet sein, oder es kann eine separate Abdeckplatte 32 für jeden Kühlkanal 30 vorgesehen sein.The arrangement according to the invention is shown in the following FIGS. 4 to 7. In a carrier plate 28 of the motor housing 26, two cooling channels 30 are let in, which lead essentially in a straight line from two intake ports 20 arranged in an end face 14 of the housing 10 to the motor housing 26 (FIG. 4). The intake manifold 20 protrude from the housing 10. The cooling channels 30 are covered with a cover plate 32 (FIG. 5), so that airtight cooling channels 30 are formed. The cover plate 32 can be detachably or firmly connected to the edges of the cooling channels 30, for example glued, screwed or clamped onto the cooling channels 30. The cover plate 32 can be formed from a single piece for all the cooling channels 30, or a separate cover plate 32 can be provided for each cooling channel 30.
Fig. 6 zeigt einen Schalter 22, der im Gehäuse auf den Kühl- kanälen 30 bzw. der Abdeckplatte 32 montiert ist. Die Kühlluft gelangt in den Kühlkanälen 30 unbeeinflusst von dem Schalter 22 zum Motorgehäuse 26.6 shows a switch 22 which is mounted in the housing on the cooling channels 30 or the cover plate 32. The cooling air in the cooling channels 30 reaches the motor housing 26 without being influenced by the switch 22.
Fig. 7 zeigt ein fertig montiertes Gehäuse 10 mit zusätzli- chen stirnseitigen und seitlichen Lufteinlassöffnungen 16,7 shows a completely assembled housing 10 with additional front and side air inlet openings 16,
18. Die Ansaugstutzen 20 für die geschlossenen Kühlkanäle 30 im Innern des Gehäuses 10 sind zwischen einem Kabelanschluss 34 und den Lufteinlassöffnungen 16 in der Stirnseite 14 des Gehäuses 10 angeordnet. Bezugszeichen18. The intake manifold 20 for the closed cooling channels 30 in the interior of the housing 10 are arranged between a cable connection 34 and the air inlet openings 16 in the end face 14 of the housing 10. reference numeral
10 Gehäuse10 housing
12 Einsatzwerkzeug12 insert tool
14 Stirnseite14 end face
16 Lufteinlassöffnungen16 air intake openings
18 Lufteinlassöffnungen18 air intake openings
20 Ansaugstutzen20 intake manifolds
22 Schalter22 switches
24 Elektronik24 electronics
26 Motorgehäuse26 motor housing
28 Trägerplatte28 carrier plate
30 Kühlkanal30 cooling channel
32 Abdeckplatte32 cover plate
34 Kabelanschluss 34 Cable connection

Claims

Ansprüche Expectations
1. Elektrowerkzeugmaschine mit einem in einem Gehäuse (10) angeordneten Elektromotor und einer Kühleinrichtung (16, 18, 20, 30, 32), dadurch gekennzeichnet, dass die Kühleinrichtung (16, 18, 20, 30, 32) zumindest bereichsweise einen gegenüber einem Innenraum des Gehäuses (10) im We- sentlichen geschlossenen Kühlkanal (30) aufweist.1. Power tool with an electric motor arranged in a housing (10) and a cooling device (16, 18, 20, 30, 32), characterized in that the cooling device (16, 18, 20, 30, 32), at least in regions, is opposite one Interior of the housing (10) has essentially closed cooling channel (30).
2. Elektrowerkzeugmaschine nach Anspruch 1, dadurch gekennzeichnet, dass der Kühlkanal (30) in eine Trägerplatte (28) eines Motorgehäuses (26) eingelassen ist.2. Power tool according to claim 1, characterized in that the cooling channel (30) in a carrier plate (28) of a motor housing (26) is embedded.
3. Elektrowerkzeugmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Kühlkanal (30) mit einer Abdeckplatte (32) abgedeckt ist.3. Power tool according to claim 1 or 2, characterized in that the cooling channel (30) is covered with a cover plate (32).
4. Elektrowerkzeugmaschine nach Anspruch 3, dadurch gekennzeichnet, dass die Abdeckplatte (32) einstückig mit einem Motorgehäuse (26) ausgeführt ist. 4. Power tool according to claim 3, characterized in that the cover plate (32) is made in one piece with a motor housing (26).
5. Elektrowerkzeugmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kühlkanal (30) in einen aus dem Gehäuse (10) herausragenden Ansaugstutzen (20) mündet.5. Power tool according to one of the preceding claims, characterized in that the cooling channel (30) opens into an intake (20) projecting from the housing (10).
6. Elektrowerkzeugmaschine nach Anspruch 5, dadurch gekennzeichnet, dass der Ansaugstutzen (20) in einer Stirnseite (14) des Gehäuses (10) angeordnet ist. 6. Power tool according to claim 5, characterized in that the suction nozzle (20) is arranged in an end face (14) of the housing (10).
7. Elektrowerkzeugmaschine nach dem Oberbegriff des Anspruchs 1 und insbesondere nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kühlkanal (30) im Wesentlichen geradlinig geführt ist. 7. Power tool according to the preamble of claim 1 and in particular according to one of the preceding claims, characterized in that the cooling channel (30) is guided in a substantially straight line.
8. Elektrowerkzeugmaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zumindest zwei Kühlkanäle (30) vorgesehen sind.8. Power tool according to one of the preceding claims, characterized in that at least two cooling channels (30) are provided.
9. Elektrowerkzeugmaschine nach einem der vorhergehenden An- sprüche, dadurch gekennzeichnet, dass seitliche und/oder stirnseitige Lufteinlassöffnungen (16, 18) vorgesehen sind.9. Power tool according to one of the preceding claims, characterized in that lateral and / or front air inlet openings (16, 18) are provided.
10. Winkelschleifer mit einer Kühleinrichtung nach einem der ' vorhergehenden Ansprüche. 10. Angle grinder with a cooling device according to one of the ' preceding claims.
PCT/DE2004/002129 2003-10-15 2004-09-24 Power tool WO2005039822A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP04786845A EP1677946B1 (en) 2003-10-15 2004-09-24 Power tool
US10/550,047 US7597157B2 (en) 2004-09-24 2004-09-24 Electric power tool having cooling conduits
DE502004011078T DE502004011078D1 (en) 2003-10-15 2004-09-24 ELECTRIC MACHINE TOOL
CN2004800300621A CN1867421B (en) 2003-10-15 2004-09-24 Power tool

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10347943.0 2003-10-15
DE10347943.0A DE10347943B4 (en) 2003-10-15 2003-10-15 Power tool

Publications (1)

Publication Number Publication Date
WO2005039822A1 true WO2005039822A1 (en) 2005-05-06

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ID=34441965

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Application Number Title Priority Date Filing Date
PCT/DE2004/002129 WO2005039822A1 (en) 2003-10-15 2004-09-24 Power tool

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Country Link
EP (1) EP1677946B1 (en)
CN (1) CN1867421B (en)
DE (2) DE10347943B4 (en)
WO (1) WO2005039822A1 (en)

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Also Published As

Publication number Publication date
EP1677946A1 (en) 2006-07-12
DE10347943B4 (en) 2018-08-23
DE10347943A1 (en) 2005-05-19
DE502004011078D1 (en) 2010-06-02
EP1677946B1 (en) 2010-04-21
CN1867421A (en) 2006-11-22
CN1867421B (en) 2010-12-08

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