EP0988411B1 - Drive device for a washing machine - Google Patents

Drive device for a washing machine Download PDF

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Publication number
EP0988411B1
EP0988411B1 EP98939494A EP98939494A EP0988411B1 EP 0988411 B1 EP0988411 B1 EP 0988411B1 EP 98939494 A EP98939494 A EP 98939494A EP 98939494 A EP98939494 A EP 98939494A EP 0988411 B1 EP0988411 B1 EP 0988411B1
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EP
European Patent Office
Prior art keywords
shaft
drive device
bell
rotor
stator
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 - Lifetime
Application number
EP98939494A
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German (de)
French (fr)
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EP0988411A1 (en
Inventor
Reinhard Heyder
Jörg SKRIPPEK
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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Publication of EP0988411A1 publication Critical patent/EP0988411A1/en
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Publication of EP0988411B1 publication Critical patent/EP0988411B1/en
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    • 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 with an inside a bearing sleeve attached to a bottom wall of a tub, rigid support part via an at least approximately horizontally lying shaft stored laundry drum, which is also on the back of the tub attached flat motor is driven directly.
  • Such drive devices are from DE 39 27 426 A1 and DE 43 41 832 A1 known.
  • the stator of the is the stator of the as a brushless external rotor DC motor trained motor attached directly to the bearing sleeve of the rigid support member.
  • the shaft is mounted in the bearing sleeve and at its outer end with the The rotor of the motor is non-rotatably connected.
  • This runner is a so-called outside runner, that overlaps the stator windings as a pot and as permanent magnets trained poles.
  • the Motor is also surrounded by an insulation hood that runs directly from the motor to the surrounding one Atmosphere radiated noise dampens.
  • the known drive devices encapsulate the stand, which is caused by heat in electricity its windings are exposed to considerable temperature stress, by a pot-shaped runners (in the case of DE 43 41 832 A1 additionally by Sound insulation hood) so strong that cooling of the engine fails at all. This is supported above all by the fact that such a directly driving motor because of its necessarily low own speeds hardly to own one Cooling can come from the rotating rotor. Hence the well-known Drive devices are practically only useful if they are cooled by external cooling protected against rapid overheating.
  • the known drive devices are also not already assembled Motor available to the manufacturer of washing machines. Your stand and runner must be delivered separately and first assembled in the washing machine factory become. As a rule, special assembly facilities in a washing machine factory to complete motor assemblies not available and also are not desired, the completion of the first with the tub system stator assembly to be connected by the external rotor assembly regularly only be imprecise. Because of compliance with a small and the same air gap between the stands and extremely high demands on the rotor poles and on the centered bearing be put in the aforementioned assembly in a washing machine factory are not to be met, the known drive devices are practically only very conditionally usable.
  • the invention is based on the object, the drive device described above to make it cheaper.
  • the engine should be in the engine manufacturer's factory can be completed and checked before it goes to a washing machine manufacturer is installed, and finally be designed so that it also Carrying function of the tub can take over.
  • this object is achieved in that the stator of the motor is connected to the bottom wall of the tub instead of the rigid support part and a central bearing sleeve with one or two spaced apart Has roller bearings for the shaft of the rotor, which is on the washing drum end facing one reaching approximately in the plane of the drum-side rolling bearing has a concentric bore for receiving the shaft of the laundry drum, that the rotor has a bell attached to the outer end of its shaft, the Edge to the tub, and that on the stand a number of excitation windings are distributed in a circle with laminated cores, which have air gaps on the inner circumference of the bell rim face opposed magnetizable poles.
  • the design according to the invention gives the motor an inexpensive design Design that enables shorter shaft journals on the laundry drum less space required for transport; because the engine picks up with his anyway necessary wavelength already takes up the required installation space.
  • the Training the stand with the elements of a rigid support part leaves the replacement of the support star for the tub. This will help build the Tub saves additional costs.
  • the engine can also be used in the engine supplier's factory completely assembled and checked.
  • the appropriate assembly and Test aids are available so that motor assemblies are always assembled exactly the same can be delivered to the washing machine factory.
  • the shaft of the laundry drum inserted into the concentric bore with a lag screw in the bore from outside the rotor shaft is attached to the assembly of this module instead of one otherwise at this point usual cast star on the bottom wall of the tub system Stator of the complete motor, for example, on the circumference of the bottom wall of the Suds container are fastened with several screws before the shaft of the Washing drum is inserted into the hub of the runner from the front.
  • the runner is too this time already connected to the stand via the roller bearings and is connected to a central screw secured from behind.
  • the shaft of the laundry drum and the bore matched cones of low inclination can have the seat of the laundry drum shaft in the shaft of the rotor without a possible risk of loosening the lag screw can be significantly improved.
  • the cones can be one Have angle of inclination for the given material pairing for self-locking leads. Then the risk of loosening is almost eliminated.
  • the stand with an annular part of its im substantially parallel to the bottom wall of the tub and with a collar-like part for fastening the excitation windings on the one hand and the runner with his bell and its rim, on the other hand, an annular cavity form.
  • the motor can continue according to an advantageous embodiment of the invention be designed so that the gap between the edge and the annular Stand part on the one hand and between the bell and the collar-like stand part on the other hand, through labyrinth-like shaping against the penetration of magnetizable ones Foreign objects are sealed.
  • the tub 1 is also in a manner not shown here in one housing of a washing machine, not shown, swinging. At his Front wall 2, it has an opening 3 for loading and unloading the laundry drum 4, in the bottom wall 6 of the tub 1 about the horizontal axis 5 is rotatably mounted. For this purpose, the shaft 7, which is on the rear wall 8 of the laundry drum 4 is rotatably connected to it.
  • a motor 9 On the bottom wall 6 of the tub 1, a motor 9 is mounted, the stator support part 10 rotatably connected to the periphery of the bottom wall 6 via the flange 11 is.
  • Excitation windings 12 distribute and correspond during the rotation of the rotor 13 via air gaps 37 alternating with its magnetizable poles 14, the also segment-like on the inner circumference of the edge 15 of the bell 18 of the Runner 13 are distributed.
  • the magnetic return flow of the magnetic segments 14 is about formed the ferromagnetic edge 15. This allows the engine to work Driving torques directly above the shaft journal 7 into the washing drum 4 initiate.
  • the stator 10 of the motor 9 takes like one replaced by it Tragstern also all bearing forces.
  • the shaft 7 of the laundry drum 4 is kept very short and protrudes into a short one Cone 19 of the rotor shaft 20.
  • This shaft 20 is in one via rolling bearings 21 and 22
  • Bearing sleeve 23 of the stand 10 is supported and extends with it to the laundry drum 4 pointing end (cone 19) to the level of the inner bearing 22.
  • the concentric bore 28 can for safe assembly of the drum shaft 7 in one Taper cone 19 with a flat angle that is suitable for the given Material pair to hold the shaft 7 in a friction fit on the shaft 20 of the rotor 13. Then can the maintenance work even after removing the lag screw 29 Shaft 7 can still be held securely in cone 19.
  • the bottom wall 6 of the tub 1 is stiffened with a support star, which is part of the stand 10.
  • the supporting star has three spokes, of which the two spokes pointing downwards extend from the plane of the drawing and are therefore not visible. Only the upwardly directed spoke 24 is visible in the sectional drawing in FIG. 2.
  • the bent flange 26 of the bottom wall 6 of the tub is firmly connected to the support star by means of screws 27.
  • the bearing sleeve 23 of the stator 10 contains bearing seats for rolling bearings 21 and 22, the Inner rings with a good fit are attached to the rotor shaft 20.
  • On the inside End (cone 19) of the shaft 20 is the washing drum shaft 7 in the concentric Bore 28 of the shaft 20 of the rotor 13 inserted and by means of a central lag screw 29 secured so that this the rotor 13 via the shaft 20 and the inner rings the roller bearing 21 and 22 rotatably connects to the laundry drum 4.
  • the annular part 17 of the stand 10 bears on its facing away from the tub Side a short cylindrical part 30 with an externally attached approach 31. Concentric to this is on the annular part 17 of the stand with a smaller one Radius but greater depth attached a collar-like part 16 on which the field windings 12 are attached. At the outer end, the edge of the collar-like surface appears Part 16 in an inner annular groove 32 of the bell 18 of the rotor 13. Make both together a labyrinth seal 33. The edge 15 of the bell 18 also dips labyrinthine in the paragraph 31 of the cylindrical part 17, so that there too a labyrinth seal 34 is formed.
  • Both labyrinth seals 33 and 34 form together with their adjacent parts on the stand 10 (cylindrical part 30, more annular Part 17 and collar-like part 16) and on the runner 13 (edge 15 and bell 18) an annular cavity for the excitation windings and the magnetizable Pole 14.
  • the labyrinth seals 33 and 34 prevent this cavity from entering very well protected from especially magnetizable dust particles.
  • the rotor bell 18 is for better ventilation and cooling of the field windings 12 and magnetizable poles 15 between their shaft 20 and the bell edge 15 near equipped with openings 35 in the labyrinth seal 33.
  • These breakthroughs can advantageously be shaped at their edges so that access supported by cooling air through these openings in the sense of a fan effect becomes.
  • the openings or in their vicinity so-called whirlers can be attached, which are used for swirling the cooling air so that they have better contact with the excitation windings 12 or the collar-like part 16 on which they are mounted.
  • the motor is designed here as an electronically commutated DC motor. He can also be designed as a so-called switched reluctance motor. In in this case there is at least the edge 15 of the rotor bell 18 or its inner Pad made of a ferromagnetic material that is relatively poorly conductive.
  • the structure of the stator is comparable to that of an electronically commutated DC motor.
  • the advantage of the reluctance motor is, in particular, that it is less expensive Design of the rotor (no expensive magnetic materials).
  • the rotor bell 18 is with the shaft 20 of the rotor 13 via the same lag screw 29 connected, which serves to secure the shaft 7 of the laundry drum 4. Indeed is a large area for pre-assembly and provisional mounting of this connection Disc 36 with a pot-like recess in the depression for the head of the Screw 29 pressed. This type of is sufficient for the purpose of transporting the engine Connection off. Then it is finally secured by the lag screw 29.
  • a profile shaft, profile hub, feather key, taper or keyway connection can do this Screw connection added in a form-fitting manner, not shown

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Description

Die Erfindung betrifft eine Antriebsvorrichtung für eine Waschmaschine mit einer innerhalb einer Lagerhülse eines an einer Bodenwand eines Laugenbehälters angebrachten, steifen Tragteils über eine wenigstens annähernd horizontal liegende Welle gelagerten Wäschetrommel, die durch einen ebenfalls an der Rückseite des Laugenbehälters angebrachten, flachen Motor direkt angetrieben ist.The invention relates to a drive device for a washing machine with an inside a bearing sleeve attached to a bottom wall of a tub, rigid support part via an at least approximately horizontally lying shaft stored laundry drum, which is also on the back of the tub attached flat motor is driven directly.

Solche Antriebsvorrichtungen sind aus der DE 39 27 426 A1 und der DE 43 41 832 A1 bekannt. Darin ist der Ständer des als kollektorloser Außenläufer-Gleichstrommotor ausgebildeten Motors unmittelbar auf der Lagerhülse des steifen Tragteils befestigt. Die Welle ist in der Lagerhülse gelagert und an ihrem äußeren Ende mit dem Läufer des Motors drehfest verbunden. Dieser Läufer ist hier ein sogenannter Außenläufer, der als Topf die Ständerwicklungen übergreift und als Permanentmagnete ausgebildete Pole trägt. Beim Waschautomaten gemäß der DE 43 41 832 A1 ist der Motor zusätzlich mit einer Dämmhaube umgeben, die vom Motor direkt an die umgebende Atmosphäre abgestrahlte Geräusche dämpft.Such drive devices are from DE 39 27 426 A1 and DE 43 41 832 A1 known. In it is the stator of the as a brushless external rotor DC motor trained motor attached directly to the bearing sleeve of the rigid support member. The shaft is mounted in the bearing sleeve and at its outer end with the The rotor of the motor is non-rotatably connected. This runner is a so-called outside runner, that overlaps the stator windings as a pot and as permanent magnets trained poles. In the washing machine according to DE 43 41 832 A1 is the Motor is also surrounded by an insulation hood that runs directly from the motor to the surrounding one Atmosphere radiated noise dampens.

Die bekannten Antriebsvorrichtungen kapseln den Ständer, der durch Stromwärme in seinen Wicklungen einer erheblichen Temperaturbelastung ausgesetzt ist, durch einen topfförmig gestalteten Läufer (im Falle der DE 43 41 832 A1 zusätzlich durch die Schalldämmhaube) so stark, daß eine Kühlung des Motors überhaupt ausfällt. Dies wird vor allem auch dadurch unterstützt, daß ein derartiger direkt antreibender Motor wegen seiner notwendigerweise geringen Eigendrehzahlen kaum zu einer eigenen Kühlung durch den sich drehenden Läufer kommen kann. Daher sind die bekannten Antriebsvorrichtungen praktisch nur brauchbar, wenn sie durch eine Fremdkühlung vor schneller Überhitzung geschützt werden.The known drive devices encapsulate the stand, which is caused by heat in electricity its windings are exposed to considerable temperature stress, by a pot-shaped runners (in the case of DE 43 41 832 A1 additionally by Sound insulation hood) so strong that cooling of the engine fails at all. This is supported above all by the fact that such a directly driving motor because of its necessarily low own speeds hardly to own one Cooling can come from the rotating rotor. Hence the well-known Drive devices are practically only useful if they are cooled by external cooling protected against rapid overheating.

Die bekannten Antriebsvorrichtungen sind außerdem nicht als bereits fertig montierter Motor an das Herstellerwerk von Waschmaschinen lieferbar. Ihre Ständer und Läufer müssen getrennt angeliefert und im Waschmaschinenwerk erst miteinander montiert werden. Da in der Regel in einem Waschmaschinenwerk speziellen Montageeinrichtungen zur Komplettierung von Motorbaugruppen nicht vorhanden und auch nicht gewünscht sind, dürfte die Komplettierung der zunächst mit dem Laugenbehältersystem zu verbindenden Ständerbaugruppe durch die Außenläufer-Baugruppe regelmäßig nur ungenau erfolgen. Da an die Einhaltung eines kleinen und bei jedem Exemplar möglichst immer gleich großen Luftspalts zwischen den Ständerund den Läuferpolen sowie an die zentrierte Lagerung äußerst hohe Anforderungen gestellt werden, die bei der zuvor erwähnten Montage in einer Waschmaschinenfabrik nicht zu erfüllen sind, sind die bekannten Antriebsvorrichtungen praktisch nur sehr bedingt brauchbar.The known drive devices are also not already assembled Motor available to the manufacturer of washing machines. Your stand and runner must be delivered separately and first assembled in the washing machine factory become. As a rule, special assembly facilities in a washing machine factory to complete motor assemblies not available and also are not desired, the completion of the first with the tub system stator assembly to be connected by the external rotor assembly regularly only be imprecise. Because of compliance with a small and the same air gap between the stands and extremely high demands on the rotor poles and on the centered bearing be put in the aforementioned assembly in a washing machine factory are not to be met, the known drive devices are practically only very conditionally usable.

Der Erfindung liegt die Aufgabe zugrunde, die eingangs bezeichnete Antriebseinrichtung kostengünstiger zu gestalten. Andererseits soll der Motor im Werk des Motorenherstellers komplettiert und geprüft werden können, ehe er bei einem Waschmaschinen-Hersteller eingebaut wird, und schließlich so konzipiert sein, daß er auch die Tragfunktion des Laugenbehälters übernehmen kann.The invention is based on the object, the drive device described above to make it cheaper. On the other hand, the engine should be in the engine manufacturer's factory can be completed and checked before it goes to a washing machine manufacturer is installed, and finally be designed so that it also Carrying function of the tub can take over.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß der Ständer des Motors anstelle des steifen Tragteils mit der Bodenwand des Laugenbehälters verbunden ist und eine zentrale Lagerhülse mit einem oder zwei auf Abstand zueinander gehaltenen Wälzlagern für die Welle des Läufers aufweist, die an ihrem der Wäschetrommel zugewandten Ende eine bis etwa in die Ebene des trommelseitigen Wälzlagers reichende konzentrische Bohrung für die Aufnahme der Welle der Wäschetrommel hat, daß der Läufer eine am äußeren Ende seiner Welle befestigte Glokke besitzt, deren Rand zum Laugenbehälter weist, und daß am Ständer eine Anzahl von Erregerwicklungen mit Blechpaketen kreisförmig verteilt sind, die über Luftspalte am Innenumfang des Glockenrandes verteilten magnetisierbaren Polen gegenüberstehen. According to the invention, this object is achieved in that the stator of the motor is connected to the bottom wall of the tub instead of the rigid support part and a central bearing sleeve with one or two spaced apart Has roller bearings for the shaft of the rotor, which is on the washing drum end facing one reaching approximately in the plane of the drum-side rolling bearing has a concentric bore for receiving the shaft of the laundry drum, that the rotor has a bell attached to the outer end of its shaft, the Edge to the tub, and that on the stand a number of excitation windings are distributed in a circle with laminated cores, which have air gaps on the inner circumference of the bell rim face opposed magnetizable poles.

Durch die erfindungsgemäße Ausgestaltung erhält der Motor eine kostengünstige Bauform, durch die kürzere Wellenzapfen an der Wäschetrommel möglich sind, die beim Transport geringeren Bauraum benötigt; denn der Motor nimmt mit seiner ohnehin notwendigen Wellenlänge bereits den erforderlichen Bauraum in Anspruch. Die Ausbildung des Ständers mit den Elementen eines steifen Tragteils läßt den Ersatz des Tragsterns für den Laugenbehälter zu. Dadurch werden am Aufbau des Laugenbehälters zusätzliche Kosten gespart.The design according to the invention gives the motor an inexpensive design Design that enables shorter shaft journals on the laundry drum less space required for transport; because the engine picks up with his anyway necessary wavelength already takes up the required installation space. The Training the stand with the elements of a rigid support part leaves the replacement of the support star for the tub. This will help build the Tub saves additional costs.

Außerdem kann auf diese Weise der Motor im Herstellerwerk des Motorlieferanten komplett montiert und geprüft werden. Dort stehen die dafür geeigneten Montageund Prüfhilfsmittel zur Verfügung, so daß immer gleich genau montierte Motorbaugruppen im Waschmaschinenwerk angeliefert werden können.The engine can also be used in the engine supplier's factory completely assembled and checked. The appropriate assembly and Test aids are available so that motor assemblies are always assembled exactly the same can be delivered to the washing machine factory.

Wenn gemäß einer besonders vorteilhaften Ausgestaltung der erfindungsgemäßen Antriebseinrichtung die in die konzentrische Bohrung eingeführte Welle der Wäschetrommel mit einer Zugschraube von außerhalb der Läuferwelle her in der Bohrung befestigt ist, kann zur Montage dieser Baugruppe anstelle eines sonst an dieser Stelle üblichen Guß-Tragsterns an der Bodenwand des Laugenbehältersystems der Ständer des kompletten Motors beispielsweise am Umfang der Bodenwand des Laugenbehälters mittels mehrerer Schrauben befestigt werden, ehe die Welle der Wäschetrommel von vorn in die Nabe des Läufers gesteckt wird. Der Läufer ist zu dieser Zeit bereits über die Wälzlager mit dem Ständer verbunden und wird mit einer zentralen Schraube von hinten gesichert. Diese Arbeitsvorgänge sind denen der Befestigung eines Tragsterns und einer Riemenscheibe gemäß den bisher üblichen Waschmaschinen-Konstruktionen äußerst gleichartig, so daß vom Montagepersonal keine völlig anderen Arbeitsvorgänge erlernt werden müssen.If according to a particularly advantageous embodiment of the invention Drive device the shaft of the laundry drum inserted into the concentric bore with a lag screw in the bore from outside the rotor shaft is attached to the assembly of this module instead of one otherwise at this point usual cast star on the bottom wall of the tub system Stator of the complete motor, for example, on the circumference of the bottom wall of the Suds container are fastened with several screws before the shaft of the Washing drum is inserted into the hub of the runner from the front. The runner is too this time already connected to the stand via the roller bearings and is connected to a central screw secured from behind. These operations are those of Attachment of a star and a pulley according to the usual Washing machine designs extremely similar, so that the assembly staff no completely different work processes have to be learned.

Wenn gemäß einer vorteilhaften Ausführungsform der Erfindung die Welle der Wäschetrommel und die Bohrung aufeinander abgestimmte Konen geringer Neigung aufweisen, kann der Sitz der Wäschetrommel-Welle in der Welle des Läufers ohne eine eventuelle Gefahr des Lösens der Zugschraube erheblich verbessert werden. If, according to an advantageous embodiment of the invention, the shaft of the laundry drum and the bore matched cones of low inclination can have the seat of the laundry drum shaft in the shaft of the rotor without a possible risk of loosening the lag screw can be significantly improved.

In einer besonders vorteilhaften Weiterbildung der Erfindung können die Konen einen Neigungswinkel haben, der bei der gegebenen Materialpaarung zur Selbsthemmung führt. Dann ist die Löse-Gefahr sogar nahezu ausgeschlossen.In a particularly advantageous development of the invention, the cones can be one Have angle of inclination for the given material pairing for self-locking leads. Then the risk of loosening is almost eliminated.

Von großem Vorteil ist eine Weiterbildung der Erfindung, bei der die Läuferwelle und die Glocke lösbar miteinander verbunden sind. Durch die zusammen mit den magnetisierbaren Polen abnehmbare Glocke sind die Erregerwicklungen sehr gut zugänglich. Ein Austausch einer solchen Erregerwicklung im Falle ihres Defektes ist daher keine Affäre.A development of the invention in which the rotor shaft and the bell are releasably connected. Through the together with the magnetizable Poland removable bell, the excitation windings are very accessible. An exchange of such a pathogen winding in the event of its defect is therefore no affair.

Zur erleichterten und reproduzierbar genauen Montage der Erregerwicklungen und der magnetisierbaren Pole kann der Ständer mit einem ringförmigen Teil seiner im wesentlichen parallel zur Bodenwand des Laugenbehälters verlaufenden Partie und mit einem kragenartigen Teil für die Befestigung der Erregerwicklungen einerseits und der Läufer mit seiner Glocke und deren Rand andererseits einen ringförmigen Hohlraum bilden.For easier and reproducible precise assembly of the field windings and the magnetizable pole, the stand with an annular part of its im substantially parallel to the bottom wall of the tub and with a collar-like part for fastening the excitation windings on the one hand and the runner with his bell and its rim, on the other hand, an annular cavity form.

Der Motor kann gemäß einer vorteilhaften Ausführungsform der Erfindung weiterhin so ausgestaltet sein, daß die Spalte zwischen dem Rand und dem ringförmigen Ständerteil einerseits und zwischen der Glocke und dem kragenartigen Ständerteil andererseits durch labyrinthartige Formung gegen Eindringen von magnetisierbaren Fremdkörpern abgedichtet sind.The motor can continue according to an advantageous embodiment of the invention be designed so that the gap between the edge and the annular Stand part on the one hand and between the bell and the collar-like stand part on the other hand, through labyrinth-like shaping against the penetration of magnetizable ones Foreign objects are sealed.

Anhand eines in der Zeichnung dargestellten Ausführungsbeispiels ist die Erfindung nachstehend erläutert. Es zeigen

Fig.1
eine schematische Darstellung eines Waschmaschinen-Laugenbehälters mit einer innenliegend horizontal gelagerten Wäschetrommel, deren Antriebswelle gemeinsam mit der Nabe der Läuferglocke in der Lagerhülse des Ständers gelagert ist und
Fig. 2
eine vergrößerte und geschnitten dargestellte Ansicht eines anderen Beispiels für einen erfindungsgemäßen und an der Bodenwand montierten Motor.
The invention is explained below using an exemplary embodiment shown in the drawing. Show it
Fig.1
a schematic representation of a washing machine tub with an internally horizontally mounted laundry drum, the drive shaft is mounted together with the hub of the rotor bell in the bearing sleeve of the stand and
Fig. 2
an enlarged and sectional view of another example of an engine according to the invention and mounted on the bottom wall.

Der Laugenbehälter 1 ist auf hier nicht näher dargestellte Weise in einem ebenfalls nicht dargestellten Gehäuse einer Waschmaschine schwingend gelagert. An seiner Vorderwand 2 hat er eine Öffnung 3 zum Be- und Entladen der Wäschetrommel 4, die in der Bodenwand 6 des Laugenbehälters 1 um die horizontal liegende Achse 5 drehbar gelagert ist. Dazu dient die Welle 7, die an der Rückwand 8 der Wäschetrommel 4 drehfest mit ihr verbunden ist.The tub 1 is also in a manner not shown here in one housing of a washing machine, not shown, swinging. At his Front wall 2, it has an opening 3 for loading and unloading the laundry drum 4, in the bottom wall 6 of the tub 1 about the horizontal axis 5 is rotatably mounted. For this purpose, the shaft 7, which is on the rear wall 8 of the laundry drum 4 is rotatably connected to it.

An der Bodenwand 6 des Laugenbehälters 1 ist ein Motor 9 montiert, dessen Ständertragteil 10 über den Flansch 11 drehfest mit der Peripherie der Bodenwand 6 verbunden ist. Auf dem kragenartigen Teil 16 des ringförmigen Teils 17 der im wesentlichen parallel zur Bodenwand 6 verlaufenden Partie des Ständers 10 sind mehrere Erregerwicklungen 12 verteilt und korrespondieren während der Drehung des Läufers 13 über Luftspalte 37 abwechselnd mit dessen magnetisierbaren Polen 14, die ebenfalls segmentartig am inneren Umfang des Randes 15 der Glokke 18 des Läufers 13 verteilt sind. Der magnetische Rückfluß der Magnetsegmente 14 wird über den ferromagnetischen Rand 15 gebildet. Dadurch kann der Motor seine Antriebsmomente unmittelbar über den Wellenzapfen 7 in die Wäschetrommel 4 einleiten. Dabei nimmt der Ständer 10 des Motors 9 wie ein durch ihn ersetzter Tragstern auch alle Lagerkräfte auf.On the bottom wall 6 of the tub 1, a motor 9 is mounted, the stator support part 10 rotatably connected to the periphery of the bottom wall 6 via the flange 11 is. On the collar-like part 16 of the annular part 17 of the substantially there are several of the stand 10 running parallel to the bottom wall 6 Excitation windings 12 distribute and correspond during the rotation of the rotor 13 via air gaps 37 alternating with its magnetizable poles 14, the also segment-like on the inner circumference of the edge 15 of the bell 18 of the Runner 13 are distributed. The magnetic return flow of the magnetic segments 14 is about formed the ferromagnetic edge 15. This allows the engine to work Driving torques directly above the shaft journal 7 into the washing drum 4 initiate. The stator 10 of the motor 9 takes like one replaced by it Tragstern also all bearing forces.

Die Welle 7 der Wäschetrommel 4 ist sehr kurz gehalten und ragt in einen nur kurzen Konus 19 der Läuferwelle 20. Diese Welle 20 ist über Wälzlager 21 und 22 in einer Lagerhülse 23 des Ständers 10 gelagert und reicht mit ihrem zur Wäschetrommel 4 weisenden Ende (Konus 19) bis in die Ebene des inneren Wälzlagers 22. Dadurch nimmt die Wäschetrommel 4 mit ihrer kurzen Welle 7 gegenüber bekannten Antriebsvorrichtungen dieser Art für eventuelle Transporte einen nur kleinen Stauraum ein.The shaft 7 of the laundry drum 4 is kept very short and protrudes into a short one Cone 19 of the rotor shaft 20. This shaft 20 is in one via rolling bearings 21 and 22 Bearing sleeve 23 of the stand 10 is supported and extends with it to the laundry drum 4 pointing end (cone 19) to the level of the inner bearing 22. This takes the laundry drum 4 with its short shaft 7 compared to known Drive devices of this type for a possible transport only a small storage space on.

Die konzentrische Bohrung 28 kann zur sicheren Montage der Trommelwelle 7 in einen Konus 19 mit flachem Winkel auslaufen, der geeignet ist, bei der gegebenen Materialpaarung die Welle 7 im Reibsitz an der Welle 20 des Läufers 13 zu halten. Dann kann bei Wartungsarbeiten auch nach der Entfernung der Zugschraube 29 die Welle 7 noch sicher im Konus 19 gehalten werden. The concentric bore 28 can for safe assembly of the drum shaft 7 in one Taper cone 19 with a flat angle that is suitable for the given Material pair to hold the shaft 7 in a friction fit on the shaft 20 of the rotor 13. Then can the maintenance work even after removing the lag screw 29 Shaft 7 can still be held securely in cone 19.

Da der Ständer 10 einen sonst üblichen Tragstern für den Laugenbehälter 1 ersetzt, kann hierdurch ein besonderes Bauteil eingespart werden.Since the stand 10 replaces an otherwise usual support star for the tub 1, this can save a special component.

Gemäß Fig. 2 ist die Bodenwand 6 des Laugenbehälters 1 mit einem Tragstern versteift, der Bestandteil des Ständers 10 ist. Der Tragstern hat drei Speichen, von denen die beiden nach unten zeigenden Speichen aus der Zeichnungsebene hinausreichen und daher nicht sichtbar sind. Lediglich die nach oben weisende Speiche 24 ist in der Schnittzeichnung der Fig. 2 sichtbar. An den Außenenden 25 der Speichen ist der umgebogene Flansch 26 der Bodenwand 6 des Laugenbehälters mittels Schrauben 27 mit dem Tragstern fest verbunden.2, the bottom wall 6 of the tub 1 is stiffened with a support star, which is part of the stand 10. The supporting star has three spokes, of which the two spokes pointing downwards extend from the plane of the drawing and are therefore not visible. Only the upwardly directed spoke 24 is visible in the sectional drawing in FIG. 2. At the outer ends 25 of the spokes, the bent flange 26 of the bottom wall 6 of the tub is firmly connected to the support star by means of screws 27.

Die Lagerhülse 23 des Ständers 10 enthält Lagersitze für Wälzlager 21 und 22, deren Innenringe mit einer guten Passung auf die Läuferwelle 20 aufgesteckt sind. Am inneren Ende (Konus 19) der Welle 20 ist die Wäschetrommelwelle 7 in die konzentrische Bohrung 28 der Welle 20 des Läufers 13 gesteckt und mittels einer zentralen Zugschraube 29 gesichert, so daß diese den Läufer 13 über dessen Welle 20 und die Innenringe der Wälzlager 21 und 22 drehfest mit der Wäschetrommel 4 verbindet.The bearing sleeve 23 of the stator 10 contains bearing seats for rolling bearings 21 and 22, the Inner rings with a good fit are attached to the rotor shaft 20. On the inside End (cone 19) of the shaft 20 is the washing drum shaft 7 in the concentric Bore 28 of the shaft 20 of the rotor 13 inserted and by means of a central lag screw 29 secured so that this the rotor 13 via the shaft 20 and the inner rings the roller bearing 21 and 22 rotatably connects to the laundry drum 4.

Der ringförmige Teil 17 des Ständers 10 trägt an seiner vom Laugenbehälter abgewandten Seite einen kurzen zylindrischen Teil 30 mit einem außen angebrachten Ansatz 31. Konzentrisch dazu ist am ringförmigen Teil 17 des Ständers mit kleinerem Radius aber größerer Tiefe ein kragenartiges Teil 16 angebracht, auf dem die Erregerwicklungen 12 befestigt sind. Am äußeren Ende taucht der Rand des kragenartigen Teils 16 in eine innere Ringnut 32 der Glocke 18 des Läufers 13 ein. Beide bilden miteinander eine Labyrinthdichtung 33. Der Rand 15 der Glocke 18 taucht ebenfalls labyrinthartig in den Absatz 31 des zylindrischen Teils 17 ein, so daß auch dort eine Labyrinthdichtung 34 entsteht. Beide Labyrinthdichtungen 33 und 34 bilden zusammen mit ihren angrenzenden Partien am Ständer 10 (zylindrischer Teil 30, ringförmiger Teil 17 und kragenartiger Teil 16) und am Läufer 13 (Rand 15 und Glocke 18) einen ringförmigen Hohlraum für die Erregerwicklungen und die magnetisierbaren Pole 14. Durch die Labyrinthdichtungen 33 und 34 ist dieser Hohlraum vor dem Eindringen von insbesondere magnetisierbaren Staubteilchen sehr gut geschützt. Die Läuferglocke 18 ist zur besseren Lüftung und Kühlung der Erregerwicklungen 12 und magnetisierbaren Pole 15 zwischen ihrer Welle 20 und dem Glockenrand 15 nanahe bei der Labyrinthdichtung 33 mit Durchbrüchen 35 ausgestattet. Diese Durchbrüche können vorteilhafterweise an ihren Kanten so geformt sein, daß der Zugang von Kühlluft durch diese Durchbrüche hindurch im Sinne einer Ventilatorwirkung unterstützt wird. Zur Verbesserung der Kühlwirkung können an den Durchbrüchen oder in deren Nähe noch sogenannte Wirbler angebracht sein, die für eine Verwirbelung der Kühlluft sorgen, damit diese besseren Kontakt mit den Erregerwicklungen 12 bzw. dem kragenartigen Teil 16, an dem sie montiert sind, erhält.The annular part 17 of the stand 10 bears on its facing away from the tub Side a short cylindrical part 30 with an externally attached approach 31. Concentric to this is on the annular part 17 of the stand with a smaller one Radius but greater depth attached a collar-like part 16 on which the field windings 12 are attached. At the outer end, the edge of the collar-like surface appears Part 16 in an inner annular groove 32 of the bell 18 of the rotor 13. Make both together a labyrinth seal 33. The edge 15 of the bell 18 also dips labyrinthine in the paragraph 31 of the cylindrical part 17, so that there too a labyrinth seal 34 is formed. Both labyrinth seals 33 and 34 form together with their adjacent parts on the stand 10 (cylindrical part 30, more annular Part 17 and collar-like part 16) and on the runner 13 (edge 15 and bell 18) an annular cavity for the excitation windings and the magnetizable Pole 14. The labyrinth seals 33 and 34 prevent this cavity from entering very well protected from especially magnetizable dust particles. The rotor bell 18 is for better ventilation and cooling of the field windings 12 and magnetizable poles 15 between their shaft 20 and the bell edge 15 near equipped with openings 35 in the labyrinth seal 33. These breakthroughs can advantageously be shaped at their edges so that access supported by cooling air through these openings in the sense of a fan effect becomes. To improve the cooling effect, the openings or in their vicinity so-called whirlers can be attached, which are used for swirling the cooling air so that they have better contact with the excitation windings 12 or the collar-like part 16 on which they are mounted.

Der Motor ist hier als elektronisch kommutierter Gleichstrommotor ausgebildet. Er kann aber auch als sogenannter geschalteter Reluktanzmotor ausgeführt werden. In diesem Fall besteht zumindest der Rand 15 der Läuferglocke 18 bzw. dessen innere Auflage aus einem ferromagnetisch relativ schlecht leitenden Material. Der Aufbau des Ständers ist mit dem eines elektronisch kommutierten Gleichstrommotors vergleichbar. Der Vorteil des Reluktanzmotors besteht insbesondere in einer kostengünstigeren Gestaltung des Läufers (keine teuren Magnetwerkstoffe).The motor is designed here as an electronically commutated DC motor. He can also be designed as a so-called switched reluctance motor. In in this case there is at least the edge 15 of the rotor bell 18 or its inner Pad made of a ferromagnetic material that is relatively poorly conductive. The structure of the stator is comparable to that of an electronically commutated DC motor. The advantage of the reluctance motor is, in particular, that it is less expensive Design of the rotor (no expensive magnetic materials).

Die Läuferglocke 18 ist mit der Welle 20 des Läufers 13 über dieselbe Zugschraube 29 verbunden, die zur Besfestigung der Welle 7 der Wäschetrommel 4 dient. Allerdings ist zur Vormontage und vorläufigen Halterung dieser Verbindung eine großflächige Scheibe 36 mit einer topfartigen Vertiefung in die Senkung für den Kopf der Schraube 29 gepreßt. Für Zwecke des Transports des Motors reicht diese Art der Verbindung aus. Danach wird sie von der Zugschraube 29 endgültig gesichert. Durch eine Profilwellen-, Profilnaben-, Paßfeder-, Kegel- oder Keilnutverbindung kann diese Verschraubung in nicht dargestellter Weise formschlüssig ergänztThe rotor bell 18 is with the shaft 20 of the rotor 13 via the same lag screw 29 connected, which serves to secure the shaft 7 of the laundry drum 4. Indeed is a large area for pre-assembly and provisional mounting of this connection Disc 36 with a pot-like recess in the depression for the head of the Screw 29 pressed. This type of is sufficient for the purpose of transporting the engine Connection off. Then it is finally secured by the lag screw 29. By a profile shaft, profile hub, feather key, taper or keyway connection can do this Screw connection added in a form-fitting manner, not shown

Claims (7)

  1. Drive device for a washing machine with a laundry drum (4), which is mounted by way of an at least approximately horizontally disposed shaft (7) within a bearing sleeve (23) of a rigid support member (10) mounted at base wall (6) of a washing solution container (1) and which is directly driven by a flat motor (9) similarly mounted at the rear side of the washing solution container (1), wherein the stator (10) of the motor (9) instead of the stiff support member is connected with the base wall (6) of the washing solution container (1), the rotor (13) of the motor (9) consists of a bell (18), which surrounds the motor and the edge (15) of which faces towards the washing solution container (1), a plurality of excitation windings (12) are arranged in circular distribution at the stator (10) and by way of air gaps (37) are disposed opposite magnetisable poles (14) distributed at the inner circumference of the bell edge (15), and the stator (10) comprises a central bearing sleeve (23) with one or two roller bearings (21 and 22), which are arranged at a spacing from one another, for a rotary part (7, 20) connected with the laundry drum (4) characterised in that the rotary part carried by the roller bearings (21, 22) is a shaft (20), at the outer end of which there is detachably fastened the rotor bell (18) and which has at its end facing the laundry drum (4) a concentric bore (28), which extends approximately to the plane of the roller bearing (22) at the drum side for reception of the shaft (7) of the laundry drum (4).
  2. Drive device according to claim 1, characterised in that the shaft (7), which is guided in the concentric bore (28), of the laundry drum (4) is fastened by a tension screw (29) from outside the rotor shaft (20) in the bore (28).
  3. Drive device according to claim 2, characterised in that the shaft (7) of the laundry drum (4) and the bore (28) have cones (19) of small inclination matched to one another.
  4. Drive device according to claim 3, characterised in that the cones (19) have an angle of inclination which leads to self-locking for the given material pair.
  5. Drive device according to one of claims 1 to 4, characterised in that the rotor shaft (20) and the bell (18) are detachably connected together.
  6. Drive device according to one of the preceding claims, characterised in that the stator (10), by an annular part (17) of its partition extending substantially parallelly to the base wall (6) of the washing solution container (1) and by a collar-like part (16) for the fastening of the excitation windings (12), on the one hand and the rotor (13), by its bell (18) and the edge (15) thereof, on the other hand form an annular cavity.
  7. Drive device according to claim 6, characterised in that the gaps (33, 34) between the edge (15) and the annular stator part (17) on the one hand and between the bell (18) and the collar-like stator part (16) on the other hand are sealed off by labyrinth-like shaping against ingress of magnetisable foreign bodies.
EP98939494A 1997-06-12 1998-06-08 Drive device for a washing machine Expired - Lifetime EP0988411B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19724930A DE19724930A1 (en) 1997-06-12 1997-06-12 Drive device for a washing machine
DE19724930 1997-06-12
PCT/EP1998/003421 WO1998056974A1 (en) 1997-06-12 1998-06-08 Drive device for a washing machine

Publications (2)

Publication Number Publication Date
EP0988411A1 EP0988411A1 (en) 2000-03-29
EP0988411B1 true EP0988411B1 (en) 2002-10-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98939494A Expired - Lifetime EP0988411B1 (en) 1997-06-12 1998-06-08 Drive device for a washing machine

Country Status (6)

Country Link
US (1) US6050113A (en)
EP (1) EP0988411B1 (en)
DE (2) DE19724930A1 (en)
ES (1) ES2185198T3 (en)
TR (1) TR199903045T2 (en)
WO (1) WO1998056974A1 (en)

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EP0991805B2 (en) † 1997-06-20 2007-01-03 BSH Bosch und Siemens Hausgeräte GmbH Drive unit for a washing machine

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DE19859567A1 (en) * 1998-12-22 2000-06-29 Bsh Bosch Siemens Hausgeraete Drive device for a washing machine that can be loaded from the front
DE19922611A1 (en) * 1999-05-17 2000-11-23 Bsh Bosch Siemens Hausgeraete Drive unit for a washing machine comprises a rigid carrier, a bearing sleeve, a horizontal shaft, a motor, and a bearing connection.
DE19922610A1 (en) * 1999-05-17 2000-11-23 Bsh Bosch Siemens Hausgeraete Drive unit for a washing machine, comprises a nearly horizontal shaft with a washing drum, a flat electric motor with a rotor and a stator, and a hollow shaft member.
US6460382B1 (en) 1999-10-18 2002-10-08 Lg Electronics Inc. Structure of driving unit in drum type washing machine
DE19960501A1 (en) 1999-12-15 2001-06-21 Bsh Bosch Siemens Hausgeraete Suds container for a washing machine
DE10058407A1 (en) * 2000-11-24 2002-05-29 Bsh Bosch Siemens Hausgeraete Mounting external rotor e.g. for washing machine, involves moving rotor along shaft end to holder journal, engaging rotor with guide opening, final fitting until reaching end position, and feeding journal into opening
DE10058409A1 (en) * 2000-11-24 2002-05-29 Bsh Bosch Siemens Hausgeraete Mounting electric motor external rotor e.g. for washing machines, involves moving it freely along shaft end into guide contact with mounting device, and bringing parts into contact with mounting device for final fixing
JP2002315245A (en) * 2001-04-09 2002-10-25 Moric Co Ltd Rotor of permanent magnet type generator
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US8405268B2 (en) 2010-02-18 2013-03-26 Nidec Motor Corporation Stator with monolithic mounting bosses and assembly comprising the same
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JP6242822B2 (en) 2012-02-23 2017-12-06 ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ Fluorinated acrylate block copolymers with low dynamic surface tension
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KR102252508B1 (en) 2015-01-05 2021-05-14 엘지전자 주식회사 laundry machine
US10036114B2 (en) 2015-12-01 2018-07-31 Whirlpool Corporation Laundry treating appliance
US10125446B2 (en) 2015-12-01 2018-11-13 Whirlpool Corporation Laundry treating appliance
US10053808B2 (en) 2015-12-01 2018-08-21 Whirlpool Corporation Laundry treating appliance
US10487432B2 (en) 2015-12-01 2019-11-26 Whirlpool Corporation Laundry treating appliance
KR102646735B1 (en) * 2016-11-04 2024-03-13 삼성전자주식회사 Motor for washing machine and washing machine having the same
CN109722839B (en) * 2017-10-27 2021-08-03 青岛海尔洗涤电器有限公司 Washing machine
CN107663743B (en) * 2017-10-31 2021-07-23 青岛胶南海尔洗衣机有限公司 Outer barrel of washing machine and washing machine
KR102557578B1 (en) 2018-08-23 2023-07-20 엘지전자 주식회사 laundry apparatus

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EP0991805B2 (en) † 1997-06-20 2007-01-03 BSH Bosch und Siemens Hausgeräte GmbH Drive unit for a washing machine

Also Published As

Publication number Publication date
DE19724930A1 (en) 1998-12-17
US6050113A (en) 2000-04-18
TR199903045T2 (en) 2000-06-21
WO1998056974A1 (en) 1998-12-17
ES2185198T3 (en) 2003-04-16
EP0988411A1 (en) 2000-03-29
DE59805817D1 (en) 2002-11-07

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