Motorgehäuse für Elektrowerkzeuge Motor housings for power tools
Das bei mittels eines Universalmotors angetriebenen Elektrowerkzeugenim wesentlichen durch die Motorabmessungen und die Bürstenlänge einschließlich desKollektordurchmessers und gegebenenfalls durch ein Ubersetzungsgetriebe bestimmteBauvolumen beinhaltet in der Regel ober- und unterhalb des Motors Freiräume, diemeist gar nicht oder allenfalls zur Aufnahme von Bauelementen für Entstör- oderRegelzwecke genutzt werden.This is the case with power tools driven by a universal motoressentially by the motor dimensions and the brush length including theCollector diameter and possibly determined by a transmission gearConstruction volume usually includes free spaces above and below the enginemostly not at all or at most to accommodate components for interference suppression orControl purposes are used.
Der vorliegenden Erfindung liegt die Aufgabe-zugrunde, diese Freiräumezur Verminderung des Ventilatorgeräusches sowie des iuftströmungsgeräusches unddamit des abgestrahlten Gesamtgeräusches nutzbar zu machen.The object of the present invention is to provide these free spacesto reduce fan noise and air flow noise andthus making the emitted overall noise usable.
Zur Lösung dieser Aufgabe sieht die Erfindung vor, daß der von Ventilatordes Antriebsmotors durch Lufteinlaßschlitze im Motorengehäuse über den Kollektor,den kollektorseitigen Wickelkopf des Ankers, die Zwischenräume zwischen Feld undAnker und den abtriebseitigen Wickelkopf des Ankers angesaugte Kühlluftstrom durchim Umgebungsbereich des Ventilators vorgesehene Umlenkwände entgegen seiner ursprünglichenStrömungsrichtung in die Gehäusefreiräume geleitet wird und nach nochmaliger Umlenkungdurch in Endbereich der Gehäusefreiräume angebrachte Barrieren über im Notorgehäusebefindliche Luftaustrittsöffnungen nach außen geführt wird.To solve this problem, the invention provides that the fanthe drive motor through air inlet slots in the motor housing via the collector,the collector-side winding head of the armature, the gaps between field andArmature and the output-side winding head of the armature sucked in cooling air flowin the vicinity of the fan provided deflection walls opposite to its originalDirection of flow is directed into the housing spaces and after repeated deflectionby means of barriers in the end area of the housing clearances over the notor housinglocated air outlet openings is led to the outside.
Ein Ausführungsbeispiel der Erfindung wird im nachstehenden anhandder Zeichnung erläutert.An embodiment of the invention is based on the followingthe drawing explained.
Es zeigen: Fig. 1 einen Iangsschnitt durch das Motorgehäuse einerBohrmaschine, Fig. 2 eine Ansicht längs des Schnittes A-B durch Fig. 1.1 shows a longitudinal section through the motor housing of aDrilling machine, FIG. 2 a view along the section A-B through FIG. 1.
Beim Ausführungsbeispiel gemäß den Figuren 1 und 2 sind in den mit1 und 2 bezeichneten Freiräumen des Notorengehäuses 3 weder Bauelemente für dieFunkentstörung noch Bausteine für die Regelung der Drehzahl des Antriebsmotors 4,5untergebrasht; flr daß diese Räume vollständig für eine im Hinblick auf eine Veminderung des tuftströmungsgeräuschs vorteilhafte Bührung der Kühlluft nutzbar sind.Die besagten Entstor- und Regelbausteine sind allesamt in der Handgrirfschale 6des Gehäuses 3 angeordnet.In the embodiment according to Figures 1 and 2 are in the with1 and 2 designated spaces of the Notorengehäuses 3 neither components for theRadio interference suppression modules for regulating the speed of the drive motor 4.5crashed down; for that these spaces are completely for one in terms of a vereduction of the tuft flow noise advantageous guidance of the cooling air can be used.The aforementioned anti-interference and rule modules are all in the handle shell 6of the housing 3 arranged.
Durch im Bürstenbereich des Motorgehäuses 3 angebrachte Lufteinlaßschlitze7 gelangt die vom auf der Welle 8 des Ankers 4 angeordneten Ventilator 9 angesaugteKühlluft über den Kollektor 10, den kollektorseitigen Wickelkopf 11 des Ankers 4,die Zwischenräume 12 und 13 zwischen Anker 4 und Stator 5 und den getriebeseitigenWickelkopf 14 zum abtriebseitigen Lagerschild 15 und wird von diesem entsprechendgeformten Lagerschild in die Freiräume 1 und 2 umgelenkt.Through air inlet slots made in the brush area of the motor housing 37 is taken in by the fan 9 arranged on the shaft 8 of the armature 4Cooling air over the collector 10, the collector-side end winding 11 of the armature 4,the spaces 12 and 13 between armature 4 and stator 5 and the transmission-sideEnd winding 14 to the output end shield 15 and is accordinglyshaped bearing shield deflected into the spaces 1 and 2.
Die Kühl luft durchströmt somit infolge ihrer Umlenkung die Freiräume1 und 2 in der der ursprünglichen Ansaugrichtung entgegengesetzten Richtung biszu dem gekrümmt ausgebildeten Innenteil 16 des Motorgehäuses und tritt durch dieUmleitwirkung dieser Barriere durch die Luftaustrittsöffnungen 17 aus den Motorgehäuse3 aus (siehe Strömungspfeile in Fig. 1). Die Luftaustrittsöffnungen 17 sind dabeiso angeordnet, daß die abströmende Luft die Bedienungsperson nicht stört.The cooling air thus flows through the free spaces as a result of its deflection1 and 2 in the direction opposite to the original suction direction toto the curved inner part 16 of the motor housing and passes through theDiverting effect of this barrier through the air outlet openings 17 from the motor housing3 (see flow arrows in Fig. 1). The air outlet openings 17 are includedarranged so that the outflowing air does not disturb the operator.
Im Vergleich mit der bei Elektrowerkzeugen bisher üblichen Luftführung,derart, daß die Kühlluft unmittelbar im Ventilatorbereich nach außen befördert wird,zeitigt dle erfindungsgemäße Luftführung durch die Schallkammern (Schallberuhigungsräume)hindurch den erheblichen Vorteil, daß eine beträchtliche Reduzierung des Geräuschpegelserzielt wird. Dieser Vorteil ist darauf zurückzuführen, daß die Kühlluft durch derenUmweg durch die Schallkammern abgebremst und beruhigt wird, wobei ein Teil der Schallenergiein Wärme umgesetzt wird.In comparison with the air ducting previously used in power tools,in such a way that the cooling air is conveyed to the outside directly in the fan area,produces the air duct according to the invention through the sound chambers (sound calming rooms)through the considerable advantage that a considerable reduction in the noise levelis achieved. This advantage is due to the fact that the cooling air through theirDetour through the sound chambers is slowed down and calmed down, with part of the sound energyis converted into heat.
In weiterer Ausgestaltung der Erfindung werden, wie aus Fig. 2 ersichtlichist, die Räume zwischen dem Stator 5 des Antriebsmotors und dem Motorgehäuse 3 mitschalldämmendem und/oder schalldämpfendem Material 18 ausgekleidet. Gegebenenfallskönnen auch die Begrenzungswandungen der Freiräume 1 und 2 mit einem schalldämpfendenBelag versehen sein.In a further embodiment of the invention, as can be seen from FIGis, the spaces between the stator 5 of the drive motor and the motor housing 3 withsound-absorbing and / or sound-absorbing material 18 lined. Possiblycan also the boundary walls of the free spaces 1 and 2 with a sound-absorbingBe provided with a covering.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813147501DE3147501A1 (en) | 1981-12-01 | 1981-12-01 | Motor housing for electrical tools |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813147501DE3147501A1 (en) | 1981-12-01 | 1981-12-01 | Motor housing for electrical tools |
| Publication Number | Publication Date |
|---|---|
| DE3147501A1true DE3147501A1 (en) | 1983-06-09 |
| DE3147501C2 DE3147501C2 (en) | 1988-01-21 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19813147501GrantedDE3147501A1 (en) | 1981-12-01 | 1981-12-01 | Motor housing for electrical tools |
| Country | Link |
|---|---|
| DE (1) | DE3147501A1 (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3340799A1 (en)* | 1983-11-11 | 1985-05-23 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Electric tool |
| EP0261295A1 (en)* | 1986-08-22 | 1988-03-30 | S.A. Acec Transport | Self-cooled electrical motor |
| WO1988009077A1 (en)* | 1987-05-08 | 1988-11-17 | Firma Karl Lutz | Electric motor, in particular a drive motor for a drum pump or submersible pump |
| EP0484305B1 (en)* | 1990-10-31 | 1996-05-22 | ITT INDUSTRIES, INC. (a Delaware corporation) | High speed whirlpool pump |
| WO2005050819A3 (en)* | 2003-11-17 | 2005-09-15 | Emerson Electric Co | Low noise ventilation system for electric motor |
| US8292001B2 (en) | 2007-11-21 | 2012-10-23 | Black & Decker Inc. | Multi-mode drill with an electronic switching arrangement |
| US9391491B2 (en) | 2007-04-27 | 2016-07-12 | Hitachi Koki Co., Ltd. | Power tool |
| JP2016159381A (en)* | 2015-02-27 | 2016-09-05 | 日立工機株式会社 | Electric working machine |
| WO2019145091A1 (en)* | 2018-01-26 | 2019-08-01 | Bombardier Transportation Gmbh | An electric machine |
| EP3534504A1 (en)* | 2018-03-02 | 2019-09-04 | Black & Decker Inc. | Motor having an external heat sink for a power tool |
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| US7717191B2 (en) | 2007-11-21 | 2010-05-18 | Black & Decker Inc. | Multi-mode hammer drill with shift lock |
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| FR869298A (en)* | 1940-09-27 | 1942-01-28 | Device for vacuum cleaning | |
| GB676305A (en)* | 1949-07-08 | 1952-07-23 | Rollnick & Gordon Ltd | Improvements in electric motors for vacuum cleaning and like machines |
| DE1030443B (en)* | 1956-05-07 | 1958-05-22 | Wilhelm Bender | Electric motor with dust filter device |
| DE1173981B (en)* | 1960-12-30 | 1964-07-16 | Nikolaus Laing | Sound insulation of a small device driven by a ventilated electric motor |
| DE1628835A1 (en)* | 1966-04-02 | 1971-06-16 | Altenburg Elektrowaerme | Device for noise reduction on devices driven by electric motors |
| DE1613396A1 (en)* | 1967-06-15 | 1971-12-30 | Siemens Ag | Noise-absorbing fastening of the stator core for electrical machines of medium or low power |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR869298A (en)* | 1940-09-27 | 1942-01-28 | Device for vacuum cleaning | |
| GB676305A (en)* | 1949-07-08 | 1952-07-23 | Rollnick & Gordon Ltd | Improvements in electric motors for vacuum cleaning and like machines |
| DE1030443B (en)* | 1956-05-07 | 1958-05-22 | Wilhelm Bender | Electric motor with dust filter device |
| DE1173981B (en)* | 1960-12-30 | 1964-07-16 | Nikolaus Laing | Sound insulation of a small device driven by a ventilated electric motor |
| DE1628835A1 (en)* | 1966-04-02 | 1971-06-16 | Altenburg Elektrowaerme | Device for noise reduction on devices driven by electric motors |
| DE1613396A1 (en)* | 1967-06-15 | 1971-12-30 | Siemens Ag | Noise-absorbing fastening of the stator core for electrical machines of medium or low power |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3340799A1 (en)* | 1983-11-11 | 1985-05-23 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Electric tool |
| EP0261295A1 (en)* | 1986-08-22 | 1988-03-30 | S.A. Acec Transport | Self-cooled electrical motor |
| WO1988009077A1 (en)* | 1987-05-08 | 1988-11-17 | Firma Karl Lutz | Electric motor, in particular a drive motor for a drum pump or submersible pump |
| EP0484305B1 (en)* | 1990-10-31 | 1996-05-22 | ITT INDUSTRIES, INC. (a Delaware corporation) | High speed whirlpool pump |
| WO2005050819A3 (en)* | 2003-11-17 | 2005-09-15 | Emerson Electric Co | Low noise ventilation system for electric motor |
| US7157818B2 (en) | 2003-11-17 | 2007-01-02 | Emerson Electric Co. | Low noise ventilation system for electric motor |
| US9391491B2 (en) | 2007-04-27 | 2016-07-12 | Hitachi Koki Co., Ltd. | Power tool |
| US8292001B2 (en) | 2007-11-21 | 2012-10-23 | Black & Decker Inc. | Multi-mode drill with an electronic switching arrangement |
| JP2016159381A (en)* | 2015-02-27 | 2016-09-05 | 日立工機株式会社 | Electric working machine |
| WO2019145091A1 (en)* | 2018-01-26 | 2019-08-01 | Bombardier Transportation Gmbh | An electric machine |
| CN111630756A (en)* | 2018-01-26 | 2020-09-04 | 勃姆巴迪尔运输有限公司 | motor |
| US11505218B2 (en) | 2018-01-26 | 2022-11-22 | Bombardier Transportation Gmbh | Cooling of an electric motor |
| CN111630756B (en)* | 2018-01-26 | 2024-01-30 | 勃姆巴迪尔运输有限公司 | Motor |
| EP3534504A1 (en)* | 2018-03-02 | 2019-09-04 | Black & Decker Inc. | Motor having an external heat sink for a power tool |
| US11139722B2 (en) | 2018-03-02 | 2021-10-05 | Black & Decker Inc. | Motor having an external heat sink for a power tool |
| Publication number | Publication date |
|---|---|
| DE3147501C2 (en) | 1988-01-21 |
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|---|---|---|
| DE3147501A1 (en) | Motor housing for electrical tools | |
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| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| D2 | Grant after examination | ||
| 8363 | Opposition against the patent | ||
| 8339 | Ceased/non-payment of the annual fee |