EP1525063B1 - Method for fixing the drum of a washing machine and fitting device for the same - Google Patents

Method for fixing the drum of a washing machine and fitting device for the same Download PDF

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Publication number
EP1525063B1
EP1525063B1 EP03764958A EP03764958A EP1525063B1 EP 1525063 B1 EP1525063 B1 EP 1525063B1 EP 03764958 A EP03764958 A EP 03764958A EP 03764958 A EP03764958 A EP 03764958A EP 1525063 B1 EP1525063 B1 EP 1525063B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
drum
opening
star
walls
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
EP03764958A
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German (de)
French (fr)
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EP1525063A1 (en
Inventor
Ismael Gracia Bobed
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
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BSH Bosch und Siemens Hausgeraete GmbH
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Filing date
Publication date
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Publication of EP1525063A1 publication Critical patent/EP1525063A1/en
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Publication of EP1525063B1 publication Critical patent/EP1525063B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/03—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal otherwise than by folding
    • B21D39/031—Joining superposed plates by locally deforming without slitting or piercing
    • B21D39/032—Joining superposed plates by locally deforming without slitting or piercing by fitting a projecting part integral with one plate in a hole of the other plate
    • 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
    • D06F37/02—Rotary receptacles, e.g. drums
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49909—Securing cup or tube between axially extending concentric annuli
    • Y10T29/49911—Securing cup or tube between axially extending concentric annuli by expanding inner annulus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/49—Member deformed in situ
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/49—Member deformed in situ
    • Y10T403/4949—Deforming component is inserted section

Definitions

  • the invention relates to a method for attaching the rear wall of a drum of a washing machine to a support star, on which the drum is rotatably mounted about an axis and a fastening device, which is achieved by means of the method see, e.g. DE-A-4,326,496th Its object is to provide the attachment with features that allow the handling of larger loads when turning the drum, especially in washing machines that spin at high speeds.
  • drums of washing machines with a rotating possibility are arranged inside a container, for which purpose they are fastened to a holder (called a supporting star), which is firmly connected to an axis of rotation, which is driven by a suitable motor.
  • the carrier star is designed in a star shape, and its support arms are attached to the drum.
  • One known embodiment for attaching the support arms to the drum is to screw the ends of the support arms to a peripheral projection formed on the back wall of the drum.
  • the necessary metallic reinforcing plates are the cause of high cost of fastening type.
  • the invention has for its object to develop a new method of fixing the drum of a washing machine, in which the star of the support for the axis of rotation and its attachment cheaper but more stable.
  • the method according to the invention solves this problem in that the rear wall of the drum is attached to the carrier star at several openings of the carrier star with different sized input and output diameters, by for each opening a nozzle from the sheet of the rear wall of the drum so in the associated opening is pulled through the inlet of smaller diameter, then widening the nozzle against the walls of the opening, which define the difference in size between the inlet and outlet diameters of the opening.
  • the method of the invention provides that the designated deformation of the already drawn nozzle by the use of a pressing tool is carried out by the pressing tool is guided with a complementary to the frustoconical surface of the later nozzle mold supplementary surface through the larger hole and the upper part of the nozzle and presses against the inside of the nozzle, whereby their final shape is achieved.
  • the method of the invention is applicable to any design of the support star. However, since this conventionally has a star shape, the method of the invention provides that in each support arm of the star at least one opening for a nozzle is provided in the drum rear wall.
  • the walls of the opening, against which the corresponding nozzle of the drum presses an area which widens towards the upper end of the nozzle, so that upon deformation of the nozzle, this in the direction of said surface opens and pushes against the surface.
  • the attachment between the support star and the drum is made.
  • the extension of the walls of the opening against which the nozzle presses can take any shape. In the preferred embodiment it has a frusto-conical shape, preferably in its entirety determined by the nozzle.
  • the walls of the aperture which define the difference in size between the input and output diameters and against which the respective nozzle of the drum presses, contain at least one step to which the nozzle adapts when deformed and pressed.
  • Another embodiment includes in the frusto-conical portion of the opening a plurality of steps to secure the drum even more secure.
  • each support arm of the support star there may be included a large number of holes adapted to the requirements of the drum according to the desired spin speed, and thus to be fastened at various points on the support arms.
  • the invention provides the possibility of adding, at least in one region of the support arms, at least one lateral broadening in which at least one opening is mounted, in which a corresponding nozzle of the drum is held.
  • at least one lateral broadening is arranged at the lateral ends of each support arm.
  • the method of the invention may provide that the nozzle of the drum is carried out by means of a push-in method.
  • the fastening device obtained by the method of the invention is characterized in that the supporting star has a plurality of openings with different inlet and outlet diameters, in each case from the smaller input diameter, a nozzle is inserted, which is drawn from the rear wall of the drum such that the nozzle at least against that portion of the walls of the opening which define the differences between the input and output diameters.
  • the walls of the opening of the supporting star, with which the attachment is made, and the supporting star itself and the drum have the features that have already been described in the method according to the invention.
  • the drum 1 is mounted on the outside of its rear wall to the support arms 3 of the support star 2, which is formed star-shaped.
  • the support star 2 is in turn fixedly connected to a shaft 4, which is in communication with a drive motor, not shown, to produce the rotation of the drum 1 d in a tub, not shown.
  • the rear wall of the drum 1 is provided with a Nutung 5 in star shape, in which the support arms 3 of the supporting star 2 are located.
  • One of the fasteners conventionally used to connect the ends of the support arms 3 of the support star 2 to the drum 1 is to attach a rivet 11 (FIGS. 4 and 5) by means of an intermediate metal plate 12 which reinforces the connection, such as above by the prior art as insufficient for washing machines which spin at a very high speed. Therefore, the invention proposes an alternative or supplemental attachment to the conventionally made attachment, for which in each support arm 3 of the support star 2, at least one opening 6 is made with frusto-conical sidewalls defining an entrance of larger diameter than the exit.
  • two openings are made for each one of the support arms, however, it is possible to arrange a single opening or more than two, depending on the load caused by the spin speed of the drum.
  • At the back wall of the drum 1 and the number of openings 6 are arranged one or more nozzles 8 which project outwardly, so that the respective nozzle 8 can be accommodated in the opening 6, as shown in Figure 3a.
  • the nozzle 8 can be produced by pushing in or drawing in from the inside of the rear wall of the drum 1.
  • a through-driver 9 is inserted through the outside (larger diameter) of the opening 6, the through-driver 9 having a frustoconical surface which corresponds to the frusto-conical surface 7 of the opening 6.
  • the through-drive 9 When the through-drive 9 is lowered, its lower end penetrates into the nozzle 8, so that the nozzle 8 widens until it presses against the frustoconical walls 7 of the opening 6 (FIG. 3c), so that when the through-driver 9 is removed (FIG. the attachment of the drum 1 on the supporting star 2 is completed. In this way, an attachment with multiple support points is achieved, sharing the load, which ensures greater resistance.
  • a gradation (not shown in the figures) may be included.
  • the through-drive 9 must include a corresponding graduation, in order to be able to exert the correct and preferably full-surface pressure with respect to the nozzle 8 against the walls of the opening.
  • respective spacers 10 may be provided at the ends of the support arms 3 of the support star, in which at least one opening 6 is included to carry out the attachment according to the invention, wherein also a conventional Connection can be provided by means of the previously discussed rivet 11.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Treatment Of Fiber Materials (AREA)

Description

GEGENSTAND DER ERFINDUNGSCOPE OF THE INVENTION

Die Erfindung betrifft ein Verfahren zur Befestigung der Rückwand einer Trommel einer Waschmaschine an einem Tragstern, an dem die Trommel über eine Achse drehbar gelagert ist und eine Befestigungseinrichtung, die mithilfe des Verfahrens erzielt wird siehe z.B. DE-A-4326496. Sie hat zur Aufgabe, die Befestigung mit Merkmalen bereitzustellen, die das Aushalten größerer Belastungen beim Drehen der Trommel ermöglichen, vor allem bei Waschmaschinen, die mit hohen Geschwindigkeiten schleudern.The invention relates to a method for attaching the rear wall of a drum of a washing machine to a support star, on which the drum is rotatably mounted about an axis and a fastening device, which is achieved by means of the method see, e.g. DE-A-4,326,496th Its object is to provide the attachment with features that allow the handling of larger loads when turning the drum, especially in washing machines that spin at high speeds.

ALLGEMEINER STAND DER TECHNIKGENERAL PRIOR ART

Es ist bekannt, dass Trommeln von Waschmaschinen mit Drehmöglichkeit im Inneren eines Behälters angeordnet sind, wozu sie an einer Halterung (Tragstern genannt) befestigt sind, die mit einer Drehachse fest verbunden ist, die durch einen geeigneten Motor angetrieben wird. Der Tragstern ist sternförmig gestaltet, und seine Halterungsarme sind an der Trommel befestigt. Eine bekannte Ausführungsform zur Befestigung der Halterungsarme an der Trommel sieht vor, die Enden der Halterungsarme an einem umfänglichen Vorsprung zu verschrauben, der an der Rückwand der Trommel gebildet ist.It is known that drums of washing machines with a rotating possibility are arranged inside a container, for which purpose they are fastened to a holder (called a supporting star), which is firmly connected to an axis of rotation, which is driven by a suitable motor. The carrier star is designed in a star shape, and its support arms are attached to the drum. One known embodiment for attaching the support arms to the drum is to screw the ends of the support arms to a peripheral projection formed on the back wall of the drum.

Gegenwärtig hat man sich dafür entschieden, statt der Schraubverbindungen an dem umfänglichen Vorsprung das Ende jedes Halterungsarms des Tragsterns an der Rückwand der Trommel selbst und mithilfe einer metallischen Verstärkungsplatte zu vernieten, womit der Verbund zur Halterung der Trommel hergestellt ist.At present, it has been decided to rivet the end of each support arm of the support star to the rear wall of the drum itself and by means of a metal reinforcement plate instead of the screw connections on the peripheral projection, thus making the composite for supporting the drum.

BESCHREIBUNG DER ERFINDUNGDESCRIPTION OF THE INVENTION

Diese bekannten Halterungsarten weisen Nachteile auf. Im ersten Fall werden die Belastungen, die beim Drehen der Trommel mit hohen Geschwindigkeiten auftreten, durch die Punkte aufgenommen, an denen die Verbindung des Endes der Halterungsarme mit dem umfänglichen Vorsprung der Trommel hergestellt ist. Dies kann - insbesondere bei hohen Schleuderdrehzahlen - Risse in der Trommel hervorrufen, oder die Halterungspunkte können den Belastungen bei hohen Drehzahlen selbst nicht standhalten.These known types of support have disadvantages. In the first case, the stresses which occur when the drum is rotated at high speeds are absorbed by the points at which the connection of the end of the support arms to the peripheral projection of the drum is established. This can cause cracks in the drum, especially at high spin speeds, or the support points can not withstand the high speed loads themselves.

Im zweiten Fall sind die notwendigen metallischen Verstärkungsplatten Ursache für hohe Kosten der Befestigungart. Außerdem ist lediglich eine Befestigung für jeden der Halterungsarme des Tragsterns vorhanden, wodurch trotz der Verstärkung durch die Verstärkungsplatte die Halterungspunkte für mit hohen Schleudergeschwindigkeiten drehende Trommeln nicht fest genug sind.In the second case, the necessary metallic reinforcing plates are the cause of high cost of fastening type. In addition, there is only one attachment for each of the support arms of the support star, whereby, despite the reinforcement by the reinforcement plate, the support points for high-speed spinning drums are not strong enough.

Um die vorstehend genannten Nachteile zu beseitigen, hat die Erfindung zur Aufgabe, ein neues Befestigungsverfahren für die Trommel einer Waschmaschine zu entwickeln, bei dem der Tragstern für die Drehachse und ihre Befestigung billiger aber dennoch stabiler ist.To overcome the above-mentioned disadvantages, the invention has for its object to develop a new method of fixing the drum of a washing machine, in which the star of the support for the axis of rotation and its attachment cheaper but more stable.

Das Verfahren gemäß der Erfindung löst diese Aufgabe dadurch, dass die Rückwand der Trommel am Tragstern an mehreren Öffnungen des Tragsterns mit unterschiedlich großen Eingangs- und Ausgangsdurchmessern befestigt wird, indem für jede Öffnung eine Düse aus dem Blech der Rückwand der Trommel so in die zugeordnete Öffnung durch den Eingang mit dem kleineren Durchmesser gezogen wird, dass danach die Düse gegen die Wände der Öffnung hin erweitert wird, die den Größenunterschied zwischen den Eingangs- und Ausgangsdurchmessern der Öffnung festlegen.The method according to the invention solves this problem in that the rear wall of the drum is attached to the carrier star at several openings of the carrier star with different sized input and output diameters, by for each opening a nozzle from the sheet of the rear wall of the drum so in the associated opening is pulled through the inlet of smaller diameter, then widening the nozzle against the walls of the opening, which define the difference in size between the inlet and outlet diameters of the opening.

Das Verfahren der Erfindung sieht vor, dass die bezeichnete Verformung der bereits gezogenen Düse durch den Einsatz eines Presswerkzeugs ausgeführt wird, indem das Presswerkzeug mit einer zur Kegelstumpffläche der späteren Düsenform passenden Ergänzungsfläche durch das größere Loch und den oberen Teil der Düse geführt wird und gegen die Innenseite der Düse drückt, wodurch ihre endgültige Form erreicht wird.The method of the invention provides that the designated deformation of the already drawn nozzle by the use of a pressing tool is carried out by the pressing tool is guided with a complementary to the frustoconical surface of the later nozzle mold supplementary surface through the larger hole and the upper part of the nozzle and presses against the inside of the nozzle, whereby their final shape is achieved.

Das Verfahren der Erfindung ist auf jegliche Gestaltung des Tragsterns anwendbar. Da dieser jedoch herkömmlicherweise eine Sternform aufweist, sieht das Verfahren der Erfindung vor, dass in jedem Halterungsarm des Sterns zumindest eine Öffnung für eine Düse in der Trommelrückwand vorgesehen ist.The method of the invention is applicable to any design of the support star. However, since this conventionally has a star shape, the method of the invention provides that in each support arm of the star at least one opening for a nozzle is provided in the drum rear wall.

Bei einer Ausführungsform der Erfindung weisen die Wände der Öffnung, gegen welche die entsprechende Düse der Trommel drückt, eine Fläche auf, die sich in Richtung auf das obere Ende der Düse erweitert, so dass sich beim Verformen der Düse diese in Richtung auf die genannte Fläche öffnet und gegen die Fläche drückt. Dadurch wird die Befestigung zwischen dem Tragstern und der Trommel hergestellt.In one embodiment of the invention, the walls of the opening, against which the corresponding nozzle of the drum presses, an area which widens towards the upper end of the nozzle, so that upon deformation of the nozzle, this in the direction of said surface opens and pushes against the surface. As a result, the attachment between the support star and the drum is made.

Die Erweiterung der Wände der Öffnung, gegen die die Düse drückt, kann jegliche Gestalt annehmen. Bei der bevorzugten Ausführungsform hat sie eine kegelstumpfförmige Gestalt, vorzugsweise in ihrer von der Düse bestimmten Gesamtheit.The extension of the walls of the opening against which the nozzle presses can take any shape. In the preferred embodiment it has a frusto-conical shape, preferably in its entirety determined by the nozzle.

Es gibt auch die Möglichkeit, dass die Wände der Öffnung, welche den Größenunterschied zwischen den Eingangs- und Ausgangsdurchmessern festlegen und gegen die die jeweilige Düse der Trommel drückt, zumindest eine Abstufung enthalten, an die sich die Düse beim Verformen und Drücken anpasst.There is also the possibility that the walls of the aperture, which define the difference in size between the input and output diameters and against which the respective nozzle of the drum presses, contain at least one step to which the nozzle adapts when deformed and pressed.

Eine weitere Ausführungsform enthält im kegelstumpfförmigen Bereich der Öffnung mehrere Abstufungen, um die Trommel noch sicherer zu befestigen.Another embodiment includes in the frusto-conical portion of the opening a plurality of steps to secure the drum even more secure.

Ersichtlich kann in jedem Halterungsarm des Tragsterns eine so große Anzahl von Löchern enthalten sein, die den Anforderungen an die Trommel je nach der gewünschten Schleudergeschwindigkeit angepasst ist, und auf diese Weise die Befestigung an verschiedenen Punkten der Halterungsarme erfolgen.It can be seen that in each support arm of the support star, there may be included a large number of holes adapted to the requirements of the drum according to the desired spin speed, and thus to be fastened at various points on the support arms.

Außerdem sieht das Verfahren gemäß, der Erfindung die Möglichkeit vor, zumindest in einem Bereich der Halterungsarme zumindest eine seitliche Verbreiterung hinzuzufügen, in der zumindest eine Öffnung angebracht ist, in der eine entsprechende Düse der Trommel festgehalten wird. In Falle der Ausbildung des Tragsterns als sternförmiges Bauteil wird an den seitlichen Enden jedes Halterungsarms mindestens je eine seitliche Verbreiterung angeordnet.In addition, according to the method, the invention provides the possibility of adding, at least in one region of the support arms, at least one lateral broadening in which at least one opening is mounted, in which a corresponding nozzle of the drum is held. In the case of the formation of the carrier star as a star-shaped component at least one lateral broadening is arranged at the lateral ends of each support arm.

Das Verfahren der Erfindung kann vorsehen, dass die Düse der Trommel mithilfe eines Eindrückverfahrens ausgeführt wird.The method of the invention may provide that the nozzle of the drum is carried out by means of a push-in method.

Die mithilfe des Verfahrens der Erfindung erhaltene Befestigungseinrichtung ist dadurch gekennzeichnet, dass der Tragstern mehrere Öffnungen mit unterschiedlichen Eingangs- und Ausgangsdurchmessern aufweist, in denen jeweils vom kleineren Eingangsdurchmesser her eine Düse eingeführt ist, die aus der Rückwand der Trommel gezogen ist derart, dass die Düse zumindest gegen denjenigen Bereich der Wände der Öffnung drückt, welche die Unterschiede zwischen den Eingangs- und Ausgangsdurchmessern festlegen.The fastening device obtained by the method of the invention is characterized in that the supporting star has a plurality of openings with different inlet and outlet diameters, in each case from the smaller input diameter, a nozzle is inserted, which is drawn from the rear wall of the drum such that the nozzle at least against that portion of the walls of the opening which define the differences between the input and output diameters.

Die Wände der Öffnung des Tragsterns, mit denen die Befestigung ausgeführt ist, sowie der Tragstern selbst und die Trommel weisen die Merkmale auf, die bereits im Verfahren gemäß der Erfindung beschrieben wurden.The walls of the opening of the supporting star, with which the attachment is made, and the supporting star itself and the drum have the features that have already been described in the method according to the invention.

Im folgenden ist zum besseren Verständnis der Beschreibung und als Teil derselben eine Reihe Figuren beigelegt, in denen der Gegenstand der Erfindung erläuternd und nicht einschränkend dargestellt ist.In the following, for a better understanding of the description and as part thereof, a number of figures are enclosed, in which the subject matter of the invention is illustrated as illustrative and not restrictive.

IN DER ZEICHNUNG ZEIGENSHOW IN THE DRAWING

Figur 1FIG. 1
eine perspektivische Teilansicht des Inneren der Trommel, an deren Hinterseite die Düsen erkennbar sind, die durch Eindrücken zur Befestigung des Tragsterns ausgeführt sind und die sich auf der Außenseite der Trommel befindet,a partial perspective view of the interior of the drum, at the rear of the nozzles are visible, which are executed by pressing in to attach the support star and which is located on the outside of the drum,
Figur 2FIG. 2
zeigt eine perspektivische Teilansicht der Außenseite der Trommel und eines der Halterungsarme des Tragsterns, an dem sie befestigt ist, wobei außerdem ein Detail der Öffnung zu sehen ist, die im Tragstern zur Ausführung der Befestigung der Düse der Trommel angebracht ist,shows a partial perspective view of the outside of the drum and one of the support arms of the support star to which it is attached, also showing a detail of the opening, which is mounted in the support star for performing the attachment of the nozzle of the drum,
Figur 3a bis 3dFigure 3a to 3d
eine schematische Darstellung der verschiedenen Abläufe, die durch das Verfahren der Erfindung zum Ausführen der Befestigung des Tragsterns mit der Trommel vorgesehen sind,a schematic representation of the various processes that are provided by the method of the invention for carrying out the attachment of the support star with the drum,
Figur 4FIG. 4
eine perspektivische Teilansicht einer weiteren Ausführungsform der Enden der Halterungsarme, bei denen je eine seitliche Verbreiterung angesetzt ist, die mithilfe des Verfahrens der Erfindung an der Trommel befestigt wird, und außerdem wird durch diese Figur die Befestigung des Endes Halterungsarms gezeigt, bei der mithilfe einer herkömmlichen Vernietung und einer Metallplatte die Befestigung verstärkt ist, unda perspective partial view of a further embodiment of the ends of the support arms, in each of which a lateral broadening is attached, which is attached by means of the method of the invention to the drum, and also by this figure, the attachment of the end of the support arm is shown using a conventional Riveting and a metal plate the fixture is reinforced, and
Figur 5FIG. 5
eine Einzelheit aus dem Beispiel der Figur 4 in Schnittdarstellung, bei der die Befestigung in herkömmlicher mittels einer Metallplatte Weise verstärkt ist.a detail of the example of Figure 4 in sectional view, in which the attachment is reinforced in conventional manner by means of a metal plate manner.
BESCHREIBUNG DER BEVORZUGTEN AUSFÜHRUNGSFORMDESCRIPTION OF THE PREFERRED EMBODIMENT

In den Figuren ist teilweise eine Trommel 1 und ein Tragstern 2 dargestellt. Da dies notorisch bekannte Elemente sind, wurde auf eine komplette Darstellung aller dieser Elemente verzichtet.In the figures, a drum 1 and a carrier star 2 is partially shown. Since these are notoriously known elements, a complete representation of all these elements has been dispensed with.

Die Trommel 1 wird auf der Außenseite ihrer Rückwand an den Halterungsarmen 3 des Tragsterns 2 befestigt, der sternförmig ausgebildet ist.The drum 1 is mounted on the outside of its rear wall to the support arms 3 of the support star 2, which is formed star-shaped.

Der Tragstern 2 ist seinerseits mit einer Welle 4 fest verbunden, die mit einem nicht dargestellten Antriebsmotor in Verbindung steht, um die Drehung d er Trommel 1 in einem nicht dargestellten Laugenbehälter zu erzeugen.The support star 2 is in turn fixedly connected to a shaft 4, which is in communication with a drive motor, not shown, to produce the rotation of the drum 1 d in a tub, not shown.

Die Rückwand der Trommel 1 ist mit einer Nutung 5 in Sternform versehen, in der sich die Halterungsarme 3 des Tragsterns 2 befinden. Eine der Befestigungen, die herkömmlicherweise zum Verbinden der Enden der Halterungsarme 3 des Tragsterns 2 mit der Trommel 1 zur Anwendung kommt, besteht darin, einen Niet 11 (Figur 4 und 5) mithilfe einer Zwischenlage einer Metallplatte 12 anzubringen, die die Verbindung verstärkt, wie oben anhand des Standes der Technik als für Waschmaschinen, die mit einer sehr hohen Geschwindigkeit schleudern, unzulänglich bezeichnet. Daher schlägt die Erfindung eine alternative oder ergänzende Befestigung zu der auf herkömmliche Weise hergestellten Befestigung vor, wozu in jedem Halterungsarm 3 des Tragsterns 2 zumindest eine Öffnung 6 mit kegelstumpfförmigen Seitenwänden ausgeführt ist, die einen Eingang mit größerem Durchmesser als der Ausgang festlegen.The rear wall of the drum 1 is provided with a Nutung 5 in star shape, in which the support arms 3 of the supporting star 2 are located. One of the fasteners conventionally used to connect the ends of the support arms 3 of the support star 2 to the drum 1 is to attach a rivet 11 (FIGS. 4 and 5) by means of an intermediate metal plate 12 which reinforces the connection, such as above by the prior art as insufficient for washing machines which spin at a very high speed. Therefore, the invention proposes an alternative or supplemental attachment to the conventionally made attachment, for which in each support arm 3 of the support star 2, at least one opening 6 is made with frusto-conical sidewalls defining an entrance of larger diameter than the exit.

Beim Ausführungsbeispiel sind zwei Öffnungen für jeweils einen der Halterungsarme ausgeführt, es besteht jedoch die Möglichkeit, eine einzelne Öffnung oder mehr als zwei anzuordnen, je nach der durch die Schleudergeschwindigkeit hervorgerufenen Belastung der Trommel. An der Rückwand der Trommel 1 und der Zahl der Öffnungen 6 sind ein oder mehrere Düsen 8 angeordnet, die nach außen vorstehen, so dass die jeweilige Düse 8 in der Öffnung 6 untergebracht werden kann, wie in Figur 3a gezeigt. Die Düse 8 kann durch Eindrücken oder Einziehen von der Innenseite der Rückwand der Trommel 1 her erzeugt werden.In the embodiment, two openings are made for each one of the support arms, however, it is possible to arrange a single opening or more than two, depending on the load caused by the spin speed of the drum. At the back wall of the drum 1 and the number of openings 6 are arranged one or more nozzles 8 which project outwardly, so that the respective nozzle 8 can be accommodated in the opening 6, as shown in Figure 3a. The nozzle 8 can be produced by pushing in or drawing in from the inside of the rear wall of the drum 1.

Wenn die Düse 8 in die Öffnung 6 eingeführt ist, wird ein Durchtreiber 9 durch die Außenseite (größerer Durchmesser) der Öffnung 6 eingeführt, wobei der Durchtreiber 9 eine kegelstumpfförmige Mantelfläche aufweist, die der kegelstumpfförmigen Fläche 7 der Öffnung 6 entspricht. Beim Senken des Durchtreibers 9 dringt sein unteres Ende in die Düse 8 ein, so dass sich die Düse 8 erweitert, bis sie gegen die kegelstumpfförmigen Wände 7 der Öffnung 6 drückt (Figur 3c), so dass beim Entfernen des Durchtreibers 9 (Figur 3d) die Befestigung der Trommel 1 am Tragstern 2 vollzogen ist. Auf diese Weise wird eine Befestigung mit mehreren Halterungspunkten erzielt, die sich die Belastung teilen, wodurch eine größere Beständigkeit gewährleistet ist.When the nozzle 8 is inserted into the opening 6, a through-driver 9 is inserted through the outside (larger diameter) of the opening 6, the through-driver 9 having a frustoconical surface which corresponds to the frusto-conical surface 7 of the opening 6. When the through-drive 9 is lowered, its lower end penetrates into the nozzle 8, so that the nozzle 8 widens until it presses against the frustoconical walls 7 of the opening 6 (FIG. 3c), so that when the through-driver 9 is removed (FIG. the attachment of the drum 1 on the supporting star 2 is completed. In this way, an attachment with multiple support points is achieved, sharing the load, which ensures greater resistance.

In der kegelstumpfförmigen Wand 7 kann eine Abstufung (in den Figuren nicht dargestellt) enthalten sein. In diesem Fall muss der Durchtreiber 9 eine entsprechende Abstufung beinhalten, um den korrekten und möglichst ganzflächigen Druck hinsichtlich der Düse 8 gegen die Wände der Öffnung ausüben zu können.In the frusto-conical wall 7, a gradation (not shown in the figures) may be included. In this case, the through-drive 9 must include a corresponding graduation, in order to be able to exert the correct and preferably full-surface pressure with respect to the nozzle 8 against the walls of the opening.

Außerdem sieht die Erfindung vor, dass - falls gewünscht - für größere Belastungen jeweilige Verbreiterungen 10 an den Enden der Halterungsarme 3 des Tragsterns vorgesehen sein können, in denen zumindest eine Öffnung 6 enthalten ist, um die Befestigung gemäß der Erfindung auszuführen, wobei außerdem eine herkömmliche Verbindung mithilfe des oben schon besprochenen Niets 11 vorgesehen sein kann.In addition, the invention provides that - if desired - for larger loads respective spacers 10 may be provided at the ends of the support arms 3 of the support star, in which at least one opening 6 is included to carry out the attachment according to the invention, wherein also a conventional Connection can be provided by means of the previously discussed rivet 11.

Claims (12)

  1. Method of fastening the rear wall of a drum (1) of a washing machine to a carrier star (2), at which the drum is rotatably mounted by way of an axle (4), characterised in that the rear wall of the drum (1) is fastened to the carrier star (2) at several openings (6), which have entrance and exit diameters of different size, of the carrier star (2) in that for each opening (6) a nozzle (8) is so drawn out of the sheet metal of the rear wall of the drum (1) into the associated opening (6) through the entrance with the smaller diameter that thereafter the nozzle (8) is widened towards the walls, which determine the size difference between the entrance and exit diameters of the opening (6), of the opening (6).
  2. Method according to claim 1, characterised in that the described deformation of the already drawn nozzle (8) is executed by use of a press tool in that the press tool is led, by a complementary surface matching the frusto-conical surface of the later nozzle shape, through the larger hole and the upper part of the nozzle and is pressed against the inner side of the nozzle (8), whereby its final shape is achieved.
  3. Method according to claim 1 or 2, characterised in that the walls of the opening (6) have at least a combination with a frusto-conical surface and at least one step and the complementary surface of the press tool shapes the parts of the combination in succession.
  4. Method according to one of the preceding claims, characterised in that the carrier star (2) has a star-shaped form, in the mounting arms (3) of which there is formed each time at least one opening (6) into which the corresponding nozzle (8) of the drum (1) is drawn.
  5. Method according to one of the preceding claims, characterised in that the nozzle (8) of the drum (1) is produced by an impressing method.
  6. Fastening device for a carrier star (2) to the rear wall of the drum (1) of a washing machine, wherein a lateral widening (10) is formed in at least one region of the carrier star (2) at least at one side of at least one of the mounting arms (3) of the carrier star (2), characterised in that the drum (1) is fastened to the carrier star (2) in accordance with the method of one of claims 1 to 5, wherein the carrier star (2) has several openings (6) with different entrance and exit diameters, into each of which there is introduced from the smaller entrance diameter a nozzle (8) which is drawn out of the rear wall of the drum (1) in such a manner that the nozzle is pressed at least against that region of the walls of the opening (6) which determine the difference between the entrance and exit diameters.
  7. Fastening device according to claim 6, characterised in that at least one opening (6) for a nozzle (8) of the rear wall of the drum (1) is arranged in the lateral widening (10).
  8. Fastening device according to claim 6 or 7, characterised in that the walls of the opening (6) against which a corresponding nozzle (8) presses have a surface widening at least partly in direction towards the upper end of the nozzle (8).
  9. Fastening device according to claim 8, characterised in that the widening of the walls (6) has a frusto-conical shape.
  10. Fastening device according to claim 8 or 9, characterised in that the walls of the opening (6) determining the different entrance and exit diameters include at least one step to which the nozzle (8) is matched in shape-locking manner.
  11. Fastening device according to one of claims 8 to 10, characterised in that the walls of the opening (6) comprise at least one combination of a frusto-conical surface and at least one step.
  12. Fastening device according to one of claims 6 to 11, characterised in that the carrier star (2) has a star-shaped form containing at least one respective opening (6) in each of its mounting arms (3).
EP03764958A 2002-07-19 2003-07-09 Method for fixing the drum of a washing machine and fitting device for the same Expired - Lifetime EP1525063B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ES200201803 2002-07-19
ES200201803A ES2237976B1 (en) 2002-07-19 2002-07-19 PROCEDURE FOR THE SETTING OF THE DRUM OF A WASHER AND THE CORRESPONDING FIXATION.
PCT/EP2003/007437 WO2004009264A1 (en) 2002-07-19 2003-07-09 Method for fixing the drum of a washing machine and fitting for the same

Publications (2)

Publication Number Publication Date
EP1525063A1 EP1525063A1 (en) 2005-04-27
EP1525063B1 true EP1525063B1 (en) 2007-01-17

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ID=30470588

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03764958A Expired - Lifetime EP1525063B1 (en) 2002-07-19 2003-07-09 Method for fixing the drum of a washing machine and fitting device for the same

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US (2) US7841800B2 (en)
EP (1) EP1525063B1 (en)
DE (1) DE50306319D1 (en)
ES (2) ES2237976B1 (en)
PL (1) PL373263A1 (en)
WO (1) WO2004009264A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004047996A1 (en) * 2004-10-01 2006-04-06 BSH Bosch und Siemens Hausgeräte GmbH Tragstern for a washing machine
ES2284308B1 (en) * 2005-03-08 2008-08-01 Bsh Electrodomesticos España, S.A. DRUM FOR CLOTHING WASHING MACHINE.
ES2339625B1 (en) * 2007-08-14 2011-03-16 Bsh Electrodomesticos España, S.A FIXING DEVICE, TO FIX A DRUM SUPPORT ELEMENT TO A DRUM OF A WASHING MACHINE AND PROCEDURE TO FIX.
KR102017530B1 (en) * 2012-11-22 2019-09-04 삼성전자주식회사 Lifter and drying machine having the same
KR102639680B1 (en) * 2016-12-23 2024-02-26 삼성전자주식회사 Washing machine

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FR2802453B1 (en) 1999-12-15 2002-03-08 Cottinet SELF-WELDING ASSEMBLY OF SHEETS, OF THE BUTTONING TYPE

Also Published As

Publication number Publication date
DE50306319D1 (en) 2007-03-08
ES2237976A1 (en) 2005-08-01
PL373263A1 (en) 2005-08-22
EP1525063A1 (en) 2005-04-27
US8056375B2 (en) 2011-11-15
US7841800B2 (en) 2010-11-30
WO2004009264A1 (en) 2004-01-29
ES2237976B1 (en) 2007-06-01
US20050160772A1 (en) 2005-07-28
US20100294005A1 (en) 2010-11-25
ES2279171T3 (en) 2007-08-16

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