DE3147501C2 - - Google Patents
Info
- Publication number
- DE3147501C2 DE3147501C2 DE3147501A DE3147501A DE3147501C2 DE 3147501 C2 DE3147501 C2 DE 3147501C2 DE 3147501 A DE3147501 A DE 3147501A DE 3147501 A DE3147501 A DE 3147501A DE 3147501 C2 DE3147501 C2 DE 3147501C2
- Authority
- DE
- Germany
- Prior art keywords
- housing
- cooling air
- fan
- collector
- drive motor
- 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.)
- Expired
Links
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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Motor Or Generator Frames (AREA)
Description
Die Erfindung bezieht sich auf ein Gehäuse für Elektrowerkzeuge gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a housing for power tools according to the preamble of claim 1.
Bei einem derartigen, durch die DE-AS 11 73 981 bekannten Gehäuse sind die Luftein- und Austrittsöffnungen als Düsen ausgebildet, welche die Kühlluft auf diejenigen Teile des Motors blasen, die besonders heiß werden. Hierbei ist nachteilig, daß die durch die Düsen bewirkte Beschleunigung der Kühlluft mit einer Zunahme der Luftströmungsgeräusche verbunden ist. Des weiteren wird bei dem bekannten Gehäuse die Kühlluft auf ein- und derselben Seite zu- und abgeführt, wobei als Trennebene für die Luftströmungskanäle eine weiche Kunststoffolie dient. Über den beiden Luftkanälen sind Resonatoren verschiedener Größen angeordnet, deren viel fache, halsförmige Öffnungen verschiedene Tiefe besitzen. Damit soll ein breites Schallfrequenzband aus der die Luftkanäle durchströmenden Luft gefiltert werden.In such a housing, known from DE-AS 11 73 981 the air inlet and outlet openings are designed as nozzles, which blow the cooling air onto those parts of the engine that get particularly hot. The disadvantage here is that the Nozzles caused the cooling air to accelerate with an increase in Airflow noise is connected. Furthermore, the known housing the cooling air on one and the same side and discharged, being as a parting plane for the air flow channels a soft plastic film is used. Above the two air channels are arranged resonators of various sizes, their many multiple, neck-shaped openings have different depths. In order to is supposed to be a broad sound frequency band from which the air ducts flowing air can be filtered.
Eine auf diese Weise verwirklichte Schallisolierung ist sowohl räumlich als auch hinsichtlich der Kosten verhältnismäßig auf wendig und setzt ein nach besonderen Gesichtspunkten konzipiertes Elektrowerkzeug, z. B. eine Küchenmaschine, voraus.Sound insulation achieved in this way is both in terms of space and costs agile and uses a concept designed according to special criteria Power tool, e.g. B. a food processor, ahead.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Gehäuse der gattungsgemäßen Art einschließlich der zwischen dem An triebsmotor und der Gehäusewandung befindlichen Freiräume so aus zugestalten, daß eine Verminderung der Ventilator- und Luft strömungsgeräusche durch Verlangsamung des Kühlluftstroms bei gleichzeitiger Reduzierung der Schall- und Strömungsenergie er zielt wird.The present invention is based on the object Housing of the generic type including that between the An drive motor and the housing wall free spaces allow a reduction in fan and air flow noises by slowing the cooling air flow simultaneous reduction of sound and flow energy is aimed.
Diese Aufgabe ist mit den Maßnahmen gemäß dem kennzeichnenden Teil des Anspruchs 1 gelöst.This task is with the measures according to the characteristic part of claim 1 solved.
Ein Ausführungsbeispiel der Erfindung wird im nachstehenden anhand der Zeichnung erläutert. Es zeigtAn embodiment of the invention is shown below explained using the drawing. It shows
Fig. 1 einen Längsschnitt durch das Motor gehäuse einer Bohrmaschine, Fig. 1 a longitudinal section through the motor housing of a drilling machine,
Fig. 2 eine Ansicht längs des Schnittes A-B durch Fig. 1. FIG. 2 is a view along section AB through FIG. 1.
Beim Ausführungsbeispiel gemäß den Fig. 1 und 2 sind in den mit 1 und 2 bezeichneten Freiräumen des Gehäuses 3 weder Bauelemente für die Funkentstörung noch Bausteine für die Regelung der Drehzahl des Antriebsmotors 4, 5 untergebracht, so daß diese Räume vollständig für eine im Hinblick auf eine Verminderung des Luftströmungsgeräuschs vorteilhafte Führung der Kühlluft nutzbar sind. Die besagten Entstör- und Regelbausteine sind allesamt in der Handgriff schale 6 des Gehäuses 3 angeordnet.In the embodiment according to FIGS. 1 and 2, neither components for radio interference suppression nor components for regulating the speed of the drive motor 4, 5 are accommodated in the free spaces of the housing 3 designated 1 and 2 , so that these spaces are completely suitable for one a reduction in the air flow noise advantageous guidance of the cooling air can be used. The said interference suppression and control modules are all arranged in the handle shell 6 of the housing 3 .
Durch im Bürstenbereich des Motorgehäuses 3 angebrachte Lufteinlaßschlitze 7 gelangt die vom auf der Welle 8 des Ankers 4 angeordneten Ventilator 9 angesaugte Kühlluft über den Kollektor 10, den kollektorseitigen Wickelkopf 11 des Ankers 4, die Zwischenräume 12 und 13 zwischen Anker 4 und Stator 5 und den getriebeseitigen Wickelkopf 14 zum abtriebseitigen Lagerschild 15 und wird von diesem entsprechend geformten Lagerschild in die Freiräume 1 und 2 umgelenkt. Die Kühlluft durchströmt somit infolge ihrer Umlenkung die Freiräume 1 und 2 in der der ursprünglichen Ansaug richtung entgegengesetzten Richtung bis zu dem gekrümmt ausgebildeten Innenteil 16 des Motorgehäuses und tritt durch die Umleitwirkung dieser Barriere durch die Luft austrittskanäle 17 aus dem Motorgehäuse 3 aus (siehe Strömungspfeile in Fig. 1). Die Luftaustrittskanäle 17 sind dabei so angeordnet, daß die abströmende Luft die Bedienungsperson nicht stört. Through the air inlet slots 7 provided in the brush area of the motor housing 3 , the cooling air drawn in by the fan 9 arranged on the shaft 8 of the armature 4 passes through the collector 10 , the collector-side winding head 11 of the armature 4 , the spaces 12 and 13 between armature 4 and stator 5 and the gear-side winding head 14 to the output-side bearing plate 15 and is deflected by this correspondingly shaped bearing plate into the free spaces 1 and 2 . The cooling air thus flows through its deflection through the free spaces 1 and 2 in the direction opposite to the original intake direction up to the curved inner part 16 of the motor housing and exits through the air through the air outlet channels 17 from the motor housing 3 (see flow arrows in Fig. 1). The air outlet channels 17 are arranged so that the outflowing air does not bother the operator.
Im Vergleich mit der bei Elektrowerkzeugen bisher üblichen Luftführung, derart, daß die Kühlluft unmittelbar im Ventilator bereich nach außen befördert wird, zeitigt die erfindungs gemäße Luftführung durch die Schallkammern (Schallberuhigungs räume) hindurch den erheblichen Vorteil, daß eine beträchtliche Reduzierung des Geräuschpegels erzielt wird. Dieser Vorteil ist darauf zurückzuführen, daß die Kühlluft durch deren Umweg durch die Schallkammern abgebremst und beruhigt wird, wobei ein Teil der Schallenergie in Wärme umgesetzt wird.In comparison with that previously used for power tools Air flow, such that the cooling air is directly in the fan If the area is transported outside, the invention appropriate air flow through the sound chambers (sound calming through) the considerable advantage that a considerable Reduction of the noise level is achieved. This advantage is due to the fact that the cooling air through their detour is slowed down and calmed down by the sound chambers, whereby part of the sound energy is converted into heat.
In weiterer Ausgestaltung der Erfindung werden, wie aus Fig. 2 ersichtlich ist, die Räume zwischen dem Stator 5 des Antriebs motors und dem Gehäuse 3 mit schalldämmendem und/oder schalldämpfendem Material 18 ausgekleidet. Gegebenenfalls können auch die Begrenzungswandungen der Freiräume 1 und 2 mit einem schalldämpfenden Belag versehen sein.In a further embodiment of the invention, as can be seen from FIG. 2, the spaces between the stator 5 of the drive motor and the housing 3 are lined with sound-absorbing and / or sound-absorbing material 18 . If necessary, the boundary walls of the free spaces 1 and 2 can also be provided with a sound-absorbing covering.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19813147501 DE3147501A1 (en) | 1981-12-01 | 1981-12-01 | Motor housing for electrical tools |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19813147501 DE3147501A1 (en) | 1981-12-01 | 1981-12-01 | Motor housing for electrical tools |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3147501A1 DE3147501A1 (en) | 1983-06-09 |
DE3147501C2 true DE3147501C2 (en) | 1988-01-21 |
Family
ID=6147615
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19813147501 Granted DE3147501A1 (en) | 1981-12-01 | 1981-12-01 | Motor housing for electrical tools |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3147501A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7717191B2 (en) | 2007-11-21 | 2010-05-18 | Black & Decker Inc. | Multi-mode hammer drill with shift lock |
US7717192B2 (en) | 2007-11-21 | 2010-05-18 | Black & Decker Inc. | Multi-mode drill with mode collar |
US7735575B2 (en) | 2007-11-21 | 2010-06-15 | Black & Decker Inc. | Hammer drill with hard hammer support structure |
US7762349B2 (en) | 2007-11-21 | 2010-07-27 | Black & Decker Inc. | Multi-speed drill and transmission with low gear only clutch |
US7770660B2 (en) | 2007-11-21 | 2010-08-10 | Black & Decker Inc. | Mid-handle drill construction and assembly process |
US7798245B2 (en) | 2007-11-21 | 2010-09-21 | Black & Decker Inc. | Multi-mode drill with an electronic switching arrangement |
US7854274B2 (en) | 2007-11-21 | 2010-12-21 | Black & Decker Inc. | Multi-mode drill and transmission sub-assembly including a gear case cover supporting biasing |
DE102008020144B4 (en) * | 2007-04-27 | 2018-09-20 | Koki Holdings Co., Ltd. | power tool |
Families Citing this family (8)
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 |
US5156535A (en) * | 1990-10-31 | 1992-10-20 | Itt Corporation | High speed whirlpool pump |
US7157818B2 (en) | 2003-11-17 | 2007-01-02 | Emerson Electric Co. | Low noise ventilation system for electric motor |
JP6455226B2 (en) * | 2015-02-27 | 2019-01-23 | 工機ホールディングス株式会社 | Electric working machine |
ES2928449T3 (en) * | 2018-01-26 | 2022-11-17 | Bombardier Transp Gmbh | Electric machine |
US11139722B2 (en) * | 2018-03-02 | 2021-10-05 | Black & Decker Inc. | Motor having an external heat sink for a power tool |
Family Cites Families (5)
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 |
-
1981
- 1981-12-01 DE DE19813147501 patent/DE3147501A1/en active Granted
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008020144B4 (en) * | 2007-04-27 | 2018-09-20 | Koki Holdings Co., Ltd. | power tool |
US7717191B2 (en) | 2007-11-21 | 2010-05-18 | Black & Decker Inc. | Multi-mode hammer drill with shift lock |
US7717192B2 (en) | 2007-11-21 | 2010-05-18 | Black & Decker Inc. | Multi-mode drill with mode collar |
US7735575B2 (en) | 2007-11-21 | 2010-06-15 | Black & Decker Inc. | Hammer drill with hard hammer support structure |
US7762349B2 (en) | 2007-11-21 | 2010-07-27 | Black & Decker Inc. | Multi-speed drill and transmission with low gear only clutch |
US7770660B2 (en) | 2007-11-21 | 2010-08-10 | Black & Decker Inc. | Mid-handle drill construction and assembly process |
US7798245B2 (en) | 2007-11-21 | 2010-09-21 | Black & Decker Inc. | Multi-mode drill with an electronic switching arrangement |
US7854274B2 (en) | 2007-11-21 | 2010-12-21 | Black & Decker Inc. | Multi-mode drill and transmission sub-assembly including a gear case cover supporting biasing |
US7987920B2 (en) | 2007-11-21 | 2011-08-02 | Black & Decker Inc. | Multi-mode drill with mode collar |
US8109343B2 (en) | 2007-11-21 | 2012-02-07 | Black & Decker Inc. | Multi-mode drill with mode collar |
Also Published As
Publication number | Publication date |
---|---|
DE3147501A1 (en) | 1983-06-09 |
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Legal Events
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 |