DE3147501A1 - Motor housing for electrical tools - Google Patents

Motor housing for electrical tools

Info

Publication number
DE3147501A1
DE3147501A1 DE19813147501 DE3147501A DE3147501A1 DE 3147501 A1 DE3147501 A1 DE 3147501A1 DE 19813147501 DE19813147501 DE 19813147501 DE 3147501 A DE3147501 A DE 3147501A DE 3147501 A1 DE3147501 A1 DE 3147501A1
Authority
DE
Germany
Prior art keywords
housing
motor housing
motor
armature
spaces
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.)
Granted
Application number
DE19813147501
Other languages
German (de)
Other versions
DE3147501C2 (en
Inventor
Wilhelm Ing.(Grad.) 7057 Leutenbach Geis
Günter 7151 Auenwald Huber
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs 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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE19813147501 priority Critical patent/DE3147501A1/en
Publication of DE3147501A1 publication Critical patent/DE3147501A1/en
Application granted granted Critical
Publication of DE3147501C2 publication Critical patent/DE3147501C2/de
Granted legal-status Critical Current

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 Frames (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

A motor housing for electrical tools of conventional construction is intended to be used to reduce the fan noise and the air flow noise. This is achieved according to the invention in that the cooling air flow sucked in by the fan of the drive motor through air inlet slots in the motor housing, via the commutator, the winding overhang on the commutator side of the armature, and intermediate spaces between the field and armature and the winding overhang on the output drive side of the armature is conducted into the free spaces in the housing, in the opposite direction to its original flow direction, by means of deflection walls provided in the area surrounding the fan, and, after being deflected once again by barriers fitted in the end region of the free spaces in the housing, is guided to the exterior via air outlet openings located in the motor housing. <IMAGE>

Description

Motorgehäuse für Elektrowerkzeuge Motor housings for power tools

Das bei mittels eines Universalmotors angetriebenen Elektrowerkzeugen im wesentlichen durch die Motorabmessungen und die Bürstenlänge einschließlich des Kollektordurchmessers und gegebenenfalls durch ein Ubersetzungsgetriebe bestimmte Bauvolumen beinhaltet in der Regel ober- und unterhalb des Motors Freiräume, die meist gar nicht oder allenfalls zur Aufnahme von Bauelementen für Entstör- oder Regelzwecke genutzt werden.This is the case with power tools driven by a universal motor essentially by the motor dimensions and the brush length including the Collector diameter and possibly determined by a transmission gear Construction volume usually includes free spaces above and below the engine mostly not at all or at most to accommodate components for interference suppression or Control purposes are used.

Der vorliegenden Erfindung liegt die Aufgabe-zugrunde, diese Freiräume zur Verminderung des Ventilatorgeräusches sowie des iuftströmungsgeräusches und damit des abgestrahlten Gesamtgeräusches nutzbar zu machen.The object of the present invention is to provide these free spaces to reduce fan noise and air flow noise and thus making the emitted overall noise usable.

Zur Lösung dieser Aufgabe sieht die Erfindung vor, daß der von Ventilator des Antriebsmotors durch Lufteinlaßschlitze im Motorengehäuse über den Kollektor, den kollektorseitigen Wickelkopf des Ankers, die Zwischenräume zwischen Feld und Anker und den abtriebseitigen Wickelkopf des Ankers angesaugte Kühlluftstrom durch im Umgebungsbereich des Ventilators vorgesehene Umlenkwände entgegen seiner ursprünglichen Strömungsrichtung in die Gehäusefreiräume geleitet wird und nach nochmaliger Umlenkung durch in Endbereich der Gehäusefreiräume angebrachte Barrieren über im Notorgehäuse befindliche Luftaustrittsöffnungen nach außen geführt wird.To solve this problem, the invention provides that the fan the 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 and Armature and the output-side winding head of the armature sucked in cooling air flow in the vicinity of the fan provided deflection walls opposite to its original Direction of flow is directed into the housing spaces and after repeated deflection by means of barriers in the end area of the housing clearances over the notor housing located air outlet openings is led to the outside.

Ein Ausführungsbeispiel der Erfindung wird im nachstehenden anhand der Zeichnung erläutert.An embodiment of the invention is based on the following the drawing explained.

Es zeigen: Fig. 1 einen Iangsschnitt durch das Motorgehäuse einer Bohrmaschine, Fig. 2 eine Ansicht längs des Schnittes A-B durch Fig. 1.1 shows a longitudinal section through the motor housing of a Drilling machine, FIG. 2 a view along the section A-B through FIG. 1.

Beim Ausführungsbeispiel gemäß den Figuren 1 und 2 sind in den mit 1 und 2 bezeichneten Freiräumen des Notorengehäuses 3 weder Bauelemente für die Funkentstörung noch Bausteine für die Regelung der Drehzahl des Antriebsmotors 4,5 untergebrasht; flr daß diese Räume vollständig für eine im Hinblick auf eine Ve minderung des tuftströmungsgeräuschs vorteilhafte Bührung der Kühlluft nutzbar sind. Die besagten Entstor- und Regelbausteine sind allesamt in der Handgrirfschale 6 des Gehäuses 3 angeordnet.In the embodiment according to Figures 1 and 2 are in the with 1 and 2 designated spaces of the Notorengehäuses 3 neither components for the Radio interference suppression modules for regulating the speed of the drive motor 4.5 crashed down; for that these spaces are completely for one in terms of a ve reduction 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 6 of the housing 3 arranged.

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.Through air inlet slots made in the brush area of the motor housing 3 7 is taken in by the fan 9 arranged on the shaft 8 of the armature 4 Cooling 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-side End winding 14 to the output end shield 15 and is accordingly shaped bearing shield deflected into the spaces 1 and 2.

Die Kühl luft durchströmt somit infolge ihrer Umlenkung die Freiräume 1 und 2 in der der ursprünglichen Ansaugrichtung entgegengesetzten Richtung bis zu dem gekrümmt ausgebildeten Innenteil 16 des Motorgehäuses und tritt durch die Umleitwirkung dieser Barriere durch die Luftaustrittsöffnungen 17 aus den Motorgehäuse 3 aus (siehe Strömungspfeile in Fig. 1). Die Luftaustrittsöffnungen 17 sind dabei so angeordnet, daß die abströmende Luft die Bedienungsperson nicht stört.The cooling air thus flows through the free spaces as a result of its deflection 1 and 2 in the direction opposite to the original suction direction to to the curved inner part 16 of the motor housing and passes through the Diverting effect of this barrier through the air outlet openings 17 from the motor housing 3 (see flow arrows in Fig. 1). The air outlet openings 17 are included arranged 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 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 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 level is achieved. This advantage is due to the fact that the cooling air through their Detour through the sound chambers is slowed down and calmed down, with 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 Antriebsmotors und dem Motorgehäuse 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 is, the spaces between the stator 5 of the drive motor and the motor housing 3 with sound-absorbing and / or sound-absorbing material 18 lined. Possibly can also the boundary walls of the free spaces 1 and 2 with a sound-absorbing Be provided with a covering.

LeerseiteBlank page

Claims (3)

Pat entansprüche für Elektrowerkzeuge mit zwischen dem als Universalmotor ausgebildeten Antriebsmotor und der Gehäuseaußenwandung vorhandenen Freiräumen, dadurch gekennzeichnet, daß der vom Ventilator fdes Antriebsmotors durch tufteinlaßschlitze im Motorengehäuse über den Kollektor, den kollektorseitigen Wickelkopf des Ankers die Zwischenräume zwischen Feld und Anker und den abtriebseitigen Wickelkopf des Ankers angesaugte Kühlluftstrom durch im Umgebungsbereich des -vrentilators vorgesehene Umlenkwände entgegen seiner ursprünglichen Strömungsrichtung in die Gehäusefreiräume geleitet wird und nach nochmaliger Umlenkung durch im Endbereich der Gehäusefreiräume angebrachte Barrieren über im Motorgehause befindliche DuftaustrittsöfInungen nach außen geführt wird. Patent claims for power tools with between the universal motor trained drive motor and the housing outer wall existing free spaces, characterized in that the fan f of the drive motor through tuft inlet slots in the motor housing via the collector, the collector-side winding head of the armature the gaps between the field and armature and the end winding of the Armature sucked in cooling air flow through provided in the area surrounding the ventilator Deflection walls against its original flow direction in the housing spaces is directed and after another redirection through in the end area of the housing spaces installed barriers via fragrance outlet openings in the engine housing is guided outside. 2. Motorgehäuse nach Anspruch 1, dadurch gekennzeichnet, daß die ventilatorseitigen Umlenkwände durch das abtriebsseitige Lagerschild und die im Endbereich der Freiräume befindlichen Barrieren durch einen freiraumseitig gekrümmt ausgebildeten Innenteil des Motorgehäuses verkörpert sind. 2. Motor housing according to claim 1, characterized in that the baffles on the fan side through the end shield on the output side and the im Barriers located at the end of the free spaces are curved by a free space side trained inner part of the motor housing are embodied. 3. Motorgehäuse nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die Räume zwischen dem Stator des Antriebsmotors und dem Motorgehäuse mit schalidämmendem und/oder schalldämpfendem Material ausgekleidet sind. 3. Motor housing according to claims 1 and 2, characterized in that that the spaces between the stator of the drive motor and the motor housing with sound-absorbing and / or sound-absorbing material are lined.
DE19813147501 1981-12-01 1981-12-01 Motor housing for electrical tools Granted DE3147501A1 (en)

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 true DE3147501A1 (en) 1983-06-09
DE3147501C2 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 (10)

* Cited by examiner, † Cited by third party
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
EP0484305A2 (en) * 1990-10-31 1992-05-06 ITT INDUSTRIES, INC. (a Delaware corporation) High speed whirlpool pump
WO2005050819A2 (en) * 2003-11-17 2005-06-02 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 work 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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
US7770660B2 (en) 2007-11-21 2010-08-10 Black & Decker Inc. Mid-handle drill construction and assembly process
US7762349B2 (en) 2007-11-21 2010-07-27 Black & Decker Inc. Multi-speed drill and transmission with low gear only clutch

Citations (6)

* Cited by examiner, † Cited by third party
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
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

Cited By (17)

* Cited by examiner, † Cited by third party
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
EP0484305A2 (en) * 1990-10-31 1992-05-06 ITT INDUSTRIES, INC. (a Delaware corporation) High speed whirlpool pump
EP0484305B1 (en) * 1990-10-31 1996-05-22 ITT INDUSTRIES, INC. (a Delaware corporation) High speed whirlpool pump
WO2005050819A2 (en) * 2003-11-17 2005-06-02 Emerson Electric Co. Low noise ventilation system for electric motor
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 work 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 Electric machine
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 with a motor housing
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

Also Published As

Publication number Publication date
DE3147501C2 (en) 1988-01-21

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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