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EP0988410A1 - Dispositif d'entrainement pour un lave-linge a chargement frontal - Google Patents

Dispositif d'entrainement pour un lave-linge a chargement frontal

Info

Publication number
EP0988410A1
EP0988410A1 EP98936314A EP98936314A EP0988410A1 EP 0988410 A1 EP0988410 A1 EP 0988410A1 EP 98936314 A EP98936314 A EP 98936314A EP 98936314 A EP98936314 A EP 98936314A EP 0988410 A1 EP0988410 A1 EP 0988410A1
Authority
EP
European Patent Office
Prior art keywords
rotor
shaft
motor
hub
drive device
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
EP98936314A
Other languages
German (de)
English (en)
Other versions
EP0988410B1 (fr
EP0988410B2 (fr
Inventor
Jörg SKRIPPEK
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7832060&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0988410(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP0988410A1 publication Critical patent/EP0988410A1/fr
Publication of EP0988410B1 publication Critical patent/EP0988410B1/fr
Application granted granted Critical
Publication of EP0988410B2 publication Critical patent/EP0988410B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30—Driving arrangements 
    • D06F37/304—Arrangements or adaptations of electric motors

Definitions

  • the invention relates to a drive device for a washing machine which can be loaded from the front and has a washing drum which is mounted on the inside of a bearing sleeve of a rigid supporting part which is attached to the rear wall of a tub, via an at least approximately horizontally lying shaft and which is also mounted on the back of the tub by a flat motor is directly driven.
  • Such drive devices are known from DE 39 27 426 A1 and DE 43 41 832 A1.
  • the stator of the motor designed as a brushless external rotor direct current motor is fastened directly on the bearing sleeve of the rigid support part.
  • the shaft is mounted in the bearing sleeve and is connected at its outer end to the rotor of the motor in a rotationally fixed manner.
  • This rotor is a so-called external rotor, which overlaps the stator windings as a pot and carries poles designed as permanent magnets.
  • the motor is additionally surrounded by an insulation hood, which dampens noise emitted by the motor directly to the surrounding atmosphere.
  • the known drive devices encapsulate the stator, which is exposed to a considerable temperature load due to current heat in its windings, by a pot-shaped rotor (in the case of DE 43 41 832 A1 additionally by the sound insulation hood) so strongly that cooling of the motor fails at all. This is supported above all by the fact that such a directly driving motor scarcely becomes one because of its necessarily low inherent speeds own cooling can come from the rotating rotor. Therefore, the known drive devices are practically only useful if they are protected from rapid overheating by external cooling.
  • the known drive devices are also not available as a fully assembled motor to the manufacturer of washing machines. Your stands and runners must be delivered separately and assembled in the washing machine factory. Since special assembly devices for completing motor assemblies are generally not available in a washing machine plant and are also not desired, the stator assembly that is initially to be connected to the tub system should only be inaccurately completed by the external rotor assembly. Since extremely high demands are made on maintaining a small air gap between the stator and rotor poles, which is as large as possible for each specimen, and on the central bearing, which cannot be met in the aforementioned assembly in a washing machine factory, the known ones Drive devices can only be used to a very limited extent in practice.
  • the invention has for its object to design the drive device mentioned above so that on the one hand cooling of the stator windings through the ambient air can be easily guaranteed and the motor can not overheat in proper operation with dimensioning according to requirements and on the other hand the motor is completed in the factory of the motor manufacturer and can be checked before it is to be installed at a washing machine manufacturer.
  • the stand is connected to the rigid support part or instead of the rigid support part with the rear wall of the tub and has a central bearing sleeve for the shaft of the laundry drum and for a hub of the rotor encompassing the shaft, that at the outer end the shaft of the rotor of the rotor, which has a plurality of openings between its hub and the peripheral part and on its circumference has a bell-shaped flange facing the tub, is centered and that the rotor consists entirely of magnetizable steel and with its bell-shaped flange over an air gap faces the sheet metal packages distributed on the stator, intended for receiving excitation windings of the stator, from the outside.
  • the motor Due to the configuration according to the invention with a large number of openings, the motor is given an open design, the heat-generating components of which, above all the stator windings, can be cooled from all sides by the ambient air. Even the low engine speed during washing operation is then sufficient for the rotor to generate heat-dissipating air movement.
  • the design of the rotor made entirely of steel simplifies the manufacture enormously compared to the otherwise known "direct drive motors" with special dynamo sheet packages and excitation windings. In addition, the heat dissipation is not disturbed by material interruptions or changes.
  • the engine can also be fully assembled and tested in the engine supplier's factory.
  • the appropriate assembly and testing aids are available there, so that precisely assembled motor assemblies can always be delivered to the washing machine factory.
  • this assembly can be mounted on the rear wall of the tub system instead of a cast support star otherwise usual at this point or in addition.
  • the stator of the complete motor is attached to the rear wall of the tub by means of several screws. Then the shaft of the laundry drum is inserted from the front into the hub of the rotor, which is already connected to the stand via the roller bearings, and secured from behind with a central screw.
  • parts of the rotor are designed to support an air movement which arises during its rotational movement, the rotor can produce sufficient cooling air for the stator windings even with a slight rotational movement, for example at washing speed.
  • you can use a spoke serve like shape of the rotor disc and a fan-like design of these spokes or a fan-shaped formations of openings provided on the back of the rotor bell.
  • the motor is an electronically commutated direct current motor
  • the heat development can moreover be kept extremely low. Maintenance is not necessary (no carbon brushes). The service life is only limited by possible bearing wear.
  • the motor can be designed as a so-called switched reluctance motor.
  • the rotor consists of a ferromagnetic steel that conducts relatively poorly.
  • the structure of the stator is comparable to that of the electronically commutated DC motor.
  • the advantage is in particular a more cost-effective design of the rotor (no expensive magnetic materials).
  • the centered connection of the rotor can be supplemented in a rotationally fixed manner on the shaft by a positive profile shaft, profile hub, feather key, cone or keyway connection.
  • the invention is explained below using an exemplary embodiment shown in the drawing.
  • the single figure shows a schematic representation of a washing machine tub with an internally horizontally mounted washing drum, the drive shaft of which is mounted together with the hub of the rotor bell in the bearing sleeve of the motor stand.
  • the tub 1 is swingingly mounted in a housing of a washing machine, also not shown, in a manner not shown here.
  • On its front wall 2 it has an opening 3 for loading and unloading the laundry drum 4, which is rotatably mounted in the rear wall 6 of the tub 1 about the horizontal axis 5.
  • a motor 9 is mounted on the rear wall 6 of the tub 1, the stand supporting part 10 of which is connected to the rear wall 6 in a rotationally fixed manner via the flange 11.
  • the stand supporting part 10 carries on its outer circumference a plurality, preferably three, of fastening eyes which are distributed around the circumference of the tub 1 and which are firmly connected to the tub by means of screws.
  • the stand support part 10 is additionally screwed to the rear wall 6 of the tub 1 via a mounting flange in a manner not shown here.
  • a plurality of stator windings 12 are distributed on the rear surface of the stator support part 10 and face the inner surface of a bell 15 of the rotor 13 with the spacing of a narrow air gap 14.
  • the magnetic return flow of the bell flange 15 is automatically given by the ring shape.
  • the motor can therefore introduce its drive torques directly into the washing drum 4 via the shaft journal 7.
  • the stator 10 of the motor like a supporting star replaced by it, also absorbs all bearing forces.
  • the bearing sleeve 26 of the stand supporting part 10 forms bearing seats for rolling bearings, the inner rings of which are fitted onto the shaft journal 7 of the washing drum 4 with a good fit.
  • the shaft 7 is inserted into the hub 31 of the rotor 13 and secured by means of a central screw 30 so that it rotatably connects the rotor 13 to the washing drum 4 via the hub 31 and the inner rings of the roller bearings.
  • the rotor disk 13 is provided with openings 33 between its hub 26 and the bell flange 15 for better ventilation and cooling of the stator poles.
  • These openings can advantageously be shaped at their edges so that the access of cooling air through these openings is supported in the sense of a fan effect.
  • so-called vortex beer can be attached to the openings or in the vicinity thereof, which swirl the cooling air so that it receives better contact with the stator windings.
  • the motor is designed here as an electronically commutated DC motor. However, it can also be designed as a so-called switched reluctance motor.
  • at least the flange of the rotor or its inner support consists of a ferromagnetically relatively poorly conductive material.
  • the structure of the stator is comparable to that of an electronically commutated DC motor.
  • the advantage of the reluctance motor is, in particular, a more cost-effective design of the rotor (no expensive magnetic materials).
  • the screw connection 30 of the rotor 13 to the shaft 7 can be provided by a profile shaft, profile hub,

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

L'invention concerne un dispositif d'entraînement sous forme d'un entraînement direct pour un tambour de lavage en porte à faux, conçu tout particulièrement pour assurer une bonne capacité de refroidissement des enroulements du stator par l'air ambiant, afin que le moteur plat à rotation lente ne surchauffe pas en marche normale, tout en étant dimensionné de façon à satisfaire aux exigences. L'invention doit en outre permettre le prémontage intégral du moteur dans son usine de fabrication. A cet effet, le stator (10) du moteur (9) est relié à l'élément porteur rigide ou, à la place de l'élément porteur rigide, à la paroi arrière (6) du bac à lessive (1). Il comporte une douille-palier centrale (26) pour l'arbre (7) du tambour de lavage (4) et pour un moyeu (31) entourant l'arbre du rotor (13). Le moyeu (31) du rotor (13) est fixé et centré à l'extrémité extérieure de l'arbre. Le rotor présente, entre son moyeu et la partie périphérique, une multitude d'ouvertures (33) et, à sa périphérie, une bride (15) en forme de cloche orientée vers le bac à lessive (1). Le rotor est réalisé intégralement en acier magnétisable et se trouve, de l'extérieur, avec sa bride en forme de cloche, par l'intermédiaire d'une fente d'aération (14), vis-à-vis des paquets de tôles (32) répartis sur le stator (10) et servant à loger des enroulements inducteurs (12) du stator (10).
EP98936314.8A 1997-06-10 1998-06-08 Dispositif d'entrainement pour un lave-linge a chargement frontal Expired - Lifetime EP0988410B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19724475 1997-06-10
DE19724475A DE19724475B4 (de) 1997-06-10 1997-06-10 Antriebsvorrichtung für eine von vorn beschickbare Waschmaschine
PCT/EP1998/003420 WO1998056973A1 (fr) 1997-06-10 1998-06-08 Dispositif d'entrainement pour un lave-linge a chargement frontal

Publications (3)

Publication Number Publication Date
EP0988410A1 true EP0988410A1 (fr) 2000-03-29
EP0988410B1 EP0988410B1 (fr) 2002-03-27
EP0988410B2 EP0988410B2 (fr) 2013-10-23

Family

ID=7832060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98936314.8A Expired - Lifetime EP0988410B2 (fr) 1997-06-10 1998-06-08 Dispositif d'entrainement pour un lave-linge a chargement frontal

Country Status (6)

Country Link
US (1) US5996379A (fr)
EP (1) EP0988410B2 (fr)
DE (2) DE19724475B4 (fr)
ES (1) ES2175740T3 (fr)
TR (1) TR199902909T2 (fr)
WO (1) WO1998056973A1 (fr)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19859567A1 (de) * 1998-12-22 2000-06-29 Bsh Bosch Siemens Hausgeraete Antriebsvorrichtung für eine von vorn beschickbare Waschmaschine
DE19922610A1 (de) * 1999-05-17 2000-11-23 Bsh Bosch Siemens Hausgeraete Antriebsvorrichtung für eine Waschmaschine
JP3434785B2 (ja) * 1999-06-07 2003-08-11 エルジー電子株式会社 洗濯機用ｂｌｄｃモータ
AU782017B2 (en) * 1999-10-18 2005-06-30 Lg Electronics Inc. A driving unit for a drum type washing machine
KR100617213B1 (ko) * 1999-10-19 2006-08-31 엘지전자 주식회사 드럼세탁기의 구동부 구조
DE19960501A1 (de) 1999-12-15 2001-06-21 Bsh Bosch Siemens Hausgeraete Laugenbehälter für eine Waschmaschine
DE19963703A1 (de) * 1999-12-29 2001-07-05 Bsh Bosch Siemens Hausgeraete Antriebsvorrichtung für eine Waschmaschine
US6487769B2 (en) 2000-11-30 2002-12-03 Emerson Electric Co. Method and apparatus for constructing a segmented stator
US6597078B2 (en) 2000-12-04 2003-07-22 Emerson Electric Co. Electric power steering system including a permanent magnet motor
US6700284B2 (en) 2001-03-26 2004-03-02 Emerson Electric Co. Fan assembly including a segmented stator switched reluctance fan motor
US6744166B2 (en) 2001-01-04 2004-06-01 Emerson Electric Co. End cap assembly for a switched reluctance electric machine
US6897591B2 (en) 2001-03-26 2005-05-24 Emerson Electric Co. Sensorless switched reluctance electric machine with segmented stator
US7012350B2 (en) 2001-01-04 2006-03-14 Emerson Electric Co. Segmented stator switched reluctance machine
US6584813B2 (en) 2001-03-26 2003-07-01 Emerson Electric Co. Washing machine including a segmented stator switched reluctance motor
CN100414029C (zh) * 2003-06-30 2008-08-27 乐金电子(天津)电器有限公司 全自动洗衣机的驱动装置
KR20050115342A (ko) * 2004-06-02 2005-12-07 삼성전자주식회사 드럼 세탁기
KR20050119269A (ko) * 2004-06-16 2005-12-21 삼성전자주식회사 드럼세탁기
EP1797234A1 (fr) * 2004-10-08 2007-06-20 Daewoo Electronics Corporation Moteur du type a rotor exterieur et machine a laver de type a tambour comportant un tel moteur
US7342334B2 (en) * 2004-10-29 2008-03-11 Emerson Electric Co. Insulated stator with wire routing element
US7282823B2 (en) * 2004-10-29 2007-10-16 Emerson Electric Co. Self-cooling electric machine
US8405268B2 (en) 2010-02-18 2013-03-26 Nidec Motor Corporation Stator with monolithic mounting bosses and assembly comprising the same
KR102646735B1 (ko) * 2016-11-04 2024-03-13 삼성전자주식회사 세탁기용 모터 및 이를 구비하는 세탁기

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE944157C (de) * 1945-01-04 1956-06-07 Siemens Ag Schwinganordnung
NL291769A (fr) * 1962-04-19
US3254545A (en) * 1963-10-08 1966-06-07 Fichtel & Sachs Ag Dual-speed transmission for a washing machine
DE3275393D1 (en) * 1981-12-18 1987-03-12 Cerac Inst Sa Washing machine
US4998052A (en) * 1989-07-28 1991-03-05 General Electric Company Gearless direct drive switched reluctance motor for laundry application
DE3927426B4 (de) * 1989-08-19 2006-02-23 Ebm-Papst Mulfingen Gmbh & Co. Kg Antriebseinheit für eine Wäsche-Behandlungsmaschine
DE4341832C2 (de) * 1993-12-08 2001-11-08 Fhp Motors Gmbh Waschautomat
JP3229114B2 (ja) * 1994-03-31 2001-11-12 株式会社東芝 洗濯機
DE19546185B4 (de) * 1995-12-11 2010-07-01 BSH Bosch und Siemens Hausgeräte GmbH Antriebsvorrichtung für eine von vorn beschickbare Waschmaschine
DE19547745A1 (de) * 1995-12-20 1997-06-26 Bosch Siemens Hausgeraete Antriebsvorrichtung für eine von vorn beschickbare Waschmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9856973A1 *

Also Published As

Publication number Publication date
EP0988410B1 (fr) 2002-03-27
DE19724475A1 (de) 1998-12-17
EP0988410B2 (fr) 2013-10-23
DE59803525D1 (de) 2002-05-02
TR199902909T2 (xx) 2000-07-21
DE19724475B4 (de) 2010-08-05
ES2175740T3 (es) 2002-11-16
WO1998056973A1 (fr) 1998-12-17
US5996379A (en) 1999-12-07

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