EP0212259B1 - Laugenbehälter mit aus verschiedenen Materialien zusammengesetzter Struktur für eine von oben beschickbare Waschmaschine - Google Patents

Laugenbehälter mit aus verschiedenen Materialien zusammengesetzter Struktur für eine von oben beschickbare Waschmaschine Download PDF

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Publication number
EP0212259B1
EP0212259B1 EP86109781A EP86109781A EP0212259B1 EP 0212259 B1 EP0212259 B1 EP 0212259B1 EP 86109781 A EP86109781 A EP 86109781A EP 86109781 A EP86109781 A EP 86109781A EP 0212259 B1 EP0212259 B1 EP 0212259B1
Authority
EP
European Patent Office
Prior art keywords
circumferential wall
tub
wall
end walls
tub according
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
Application number
EP86109781A
Other languages
English (en)
French (fr)
Other versions
EP0212259A3 (en
EP0212259A2 (de
Inventor
Dino Piai
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.)
Industrie Zanussi SpA
Original Assignee
Industrie Zanussi SpA
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
Priority claimed from IT45727/85A external-priority patent/IT1187287B/it
Priority claimed from IT3408385U external-priority patent/IT209168Z2/it
Application filed by Industrie Zanussi SpA filed Critical Industrie Zanussi SpA
Priority to AT86109781T priority Critical patent/ATE41181T1/de
Publication of EP0212259A2 publication Critical patent/EP0212259A2/de
Publication of EP0212259A3 publication Critical patent/EP0212259A3/en
Application granted granted Critical
Publication of EP0212259B1 publication Critical patent/EP0212259B1/de
Expired legal-status Critical Current

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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
    • D06F37/26—Casings; Tubs
    • D06F37/261—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements
    • D06F37/262—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements made of plastic material, e.g. by injection moulding
    • 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
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • 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
    • D06F37/26—Casings; Tubs
    • D06F37/261—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements
    • D06F37/263—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements assembled from at least two elements connected to each other; Connecting or sealing means therefor
    • 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
    • D06F37/26—Casings; Tubs
    • D06F37/266—Gaskets mounted between tub and casing around the loading opening

Definitions

  • the present invention relates to a tub for a laundry washing machine with a drum mounted for rotation about a horizontal axis and adapted to be loaded from above, that is, through the circumferential walls of the drum and the tub.
  • tubs for washing machines of a composite structure consisting of metal and plastic components to thereby combine the advantages of the mechanical strength of the metal components with the advantages of the sealing capability and resistance to corrosion typical for plastic components.
  • tubs of this type are usually of an undesirably complicated construction.
  • a composite tub having a relatively simple structure is described for instance in GB-PS 1,555,746.
  • this tub is formed of a circumferential wall of a plastic material sealingly cooperating with two disc-shaped end walls made of metal.
  • the various components are secured to one another by means of tension bolts extending between the two end walls.
  • the heater elements for heating the washing liquid are disposed in proximity to the circumferential wall of the tub, that is, close to a plastic component which should be protected against overheating.
  • This entails the necessity of providing the machine with suitable electric circuits or similar safety components for ensuring adequate protection of the tub against overheating.
  • the overall construction of the machine becomes undesirably complicated.
  • the reliable assembly of the circumferential wall with the end walls requires the employ of separate fastener means, specifically, tension bolts, the elimination of which would result in a desirable simplification of the construction.
  • a tub for a washing machine having a circumferential wall formed with a loading opening and sealingly connected to a pair of opposite substantially disc-shaped end walls incorporating respectable support bearings for a drum mounted for rotation about a substantially horizontal axis.
  • This tub is basically characterized in that the circumferential wall is made of metal while the two end walls are made of a plastic material. Preferably at least one of the end walls is circumferentially welted to the respective rim of the circumferential wall.
  • Figure 1 shows an axial sectional view of the tub according to the invention, in combination with various operating components of a washing machine
  • Figures 2 and 3 show on an enlarged scale respective details of the tub of Figure 1 in a preferred embodiment.
  • a tub is substantially composed of a circumferential wall 1 made of a metal, preferably stainless steel, the opposite rims of which sealingly cooperate with respective disc-shaped end walls 2 and 3 made of a plastic material and incorporating bearings 4 and 5, respectively, for rotatably supporting a horizontal shaft 6 of a washing drum 7.
  • the top portion of circumferential wall 1 is provided with a loading opening 13 given access to the interior of drum 7 after opening a loading hatch 14.
  • Drum 7 is adapted to be rotated by a driving motor 15 secured to end walls 2 and 3 by means of a support bracket 19.
  • the driving power of motor 15 is transmitted by a belt 16 cooperating with a pulley 17 fixedly secured to shaft 6 at the side of the tub corresponding to end wall 2.
  • end wall 2 is formed with an offset rim portion 8 which is secured to the respective rim of circumferential wall 1 by means of bolts 9 or the like, with the interposition of a sealing gasket 10.
  • end wall 3 is preferably formed with a rim portion 11 of increased wall thickness along which it is welted to the respective rim of circumferential wall 1, with a sealing gasket 12 interposed therebetween.
  • the welt is executed with a relatively great radius to thereby minimize the stress occurring in circumferential wall 1 at the location of the welt connection.
  • Sealing gasket 12 is accommodated in a groove 20 of rim portion 11 and is elastically compressed in the radial direction by an annular bead 21 formed in circumferential wall 1 adjacent the respective rim.
  • Bead 21 is preferably formed simultaneously with the welting of circumferential wall 1 onto end wall 3.
  • sealing gasket 12 by annular bead 21 ensures a liquid-tight seal between the metallic circumferential wall 1 and plastic end wall 3 irrespective of the different thermal expansion coefficient of the two components, even when the tub is subjected to relatively high thermal loads.
  • elastic compression of sealing gasket 20 compensates any tolerances and/or imperfections of the contact surfaces between circumferential wall 1 and end wall 3.
  • the welt-connected end wall 3 is preferably likewise provided with an integrally formed annular outer rim portion 22.
  • Annular rim portion 22 projects radially outwards and is formed with seats 23 or the like adapted to receive fastener means 24 for securing operating components of the machine.
  • the annular outer rim portion 22 may thus be used for instance for securing thereto bracket 19 for supporting motor 15, brackets for the suspension of the tub by means of resilient elements, friction shock absorber plates and the like. Annular rim portion 22 may additionally be used for securing thereto a per se known device for tensioning transmission belt 16.
  • the tub according to the invention offers various advantages deriving from the above explained characteristics.
  • the incorporation of bearings 4, 5 in the plastic end walls 2 and 3, respectively, results in a structural continuity between the bearings and circumferential wall 1.
  • the latter has the only function of containing the washing liquid and is not subjected to any substantial mechanical stress, so that it can be made of stainless steel sheet of minimum thickness.
  • circumferential wall 1 being made of metal, does not present any overheating problems otherwise resulting from the operation and the conventional positioning of the heater elements (not shown for the sake of clarity).
  • the metallic circumferential wall 1 acts as the only support element for end walls 2 and 3, without the necessity of tension bolts or the like.
  • the end walls being made of a plastic material, are particularly suited for incorporating in a per se known manner various functional elements such as means for anchoring the suspension springs of the laundering assembly, pressure sensing outlets for pressure switches, support means for equilibration weights 18, and the like.
  • Pulley 17 may thus be disposed adjacent end wall 3, so that the opposite end wall 2 can be readily dismounted for giving access to the interior of the tub.
  • the bolts 9 securing end wall 2 to circumferential wall 1 may be replaced by an annular channel- section clamping member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Centrifugal Separators (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Sealing Of Bearings (AREA)

Claims (6)

1. Bottich für eine Waschmaschine mit einer Umfangswand, die mit einer Beladeöffnung versehen ist und abgedichtet mit zwei im wesentlichen scheibenförmigen Stirnwänden verbunden ist, die entsprechende Traglager für eine um eine im wesentliche horizontale Achse drehbar gelagerte Trommel aufweisen, dadurch gekennzeichnet, daß die Umfangswand (1) aus Metall besteht, während die zwei Stirnwände (2, 3) aus einem Plastikmaterial bestehen.
2. Bottich nach Anspruch 1, dadurch gekennzeichnet, daß die Umfangswand (1) mit wenigstens einer Ringwulst (21) benachbart ihrem Ende versehen ist, um einen Dichtungsring (12) elastisch zusammenzudrücken, der zwischen der Umfangswand und einer entsprechenden Stirnwand (3) angeordnet ist, die mit ihr durch Falzen verbunden ist.
3. Bottich nach Anspruch 1, dadurch gekennzeichnet, daß die durch Falzen angeschlossene Stirnwand (3) einen integral ausgebildeten, im wesentlichen ringförmigen Randabschnitt (22) aufweist, der radial davon vorsteht und mit Sitzeinrichtungen (23) versehen ist, die dazu eingerichtet sind, Befestigungseinrichtungen (24) zur Befestigung von Betriebskomponenten (25, 26) der Maschine aufzunehmen.
4. Bottich nach Anspruch 1, dadurch gekennzeichnet, daß wenigstens eine der Stirnwände (2, 3) am Umfang mit dem Rand der Umfangswand (1) verfalzt ist.
5. Bottich nach Anspruch 1, dadurch gekennzeichnet, daß jedes der Traglager (4, 5) in eine entsprechende Plastikstirnwand (2,3) inkorporiert ist.
6. Bottich nach Anspruch 1, dadurch gekennzeichnet, daß die durch Falzen angeschlossene Stirnwand (3) einen vergrößerten Randabschnitt aufweist, der dazu eingerichtet ist, mit dem Rand der metallischen Umfangswand (1) zusammenzuwirken.
EP86109781A 1985-07-16 1986-07-16 Laugenbehälter mit aus verschiedenen Materialien zusammengesetzter Struktur für eine von oben beschickbare Waschmaschine Expired EP0212259B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86109781T ATE41181T1 (de) 1985-07-16 1986-07-16 Laugenbehaelter mit aus verschiedenen materialien zusammengesetzter struktur fuer eine von oben beschickbare waschmaschine.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IT45727/85A IT1187287B (it) 1985-07-16 1985-07-16 Vasca da struttura combinata per lavatrice con caricamento dal mantello
IT4572785 1985-07-16
IT3408385U IT209168Z2 (it) 1985-10-18 1985-10-18 Vasca a struttura combinata per lavatrice con caricamento dal mantello.
IT3408385U 1985-10-18

Publications (3)

Publication Number Publication Date
EP0212259A2 EP0212259A2 (de) 1987-03-04
EP0212259A3 EP0212259A3 (en) 1987-10-21
EP0212259B1 true EP0212259B1 (de) 1989-03-08

Family

ID=26328983

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86109781A Expired EP0212259B1 (de) 1985-07-16 1986-07-16 Laugenbehälter mit aus verschiedenen Materialien zusammengesetzter Struktur für eine von oben beschickbare Waschmaschine

Country Status (4)

Country Link
EP (1) EP0212259B1 (de)
AT (1) ATE41181T1 (de)
DE (1) DE3662282D1 (de)
ES (1) ES2000513A6 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8156770B2 (en) 2002-12-27 2012-04-17 Lg Electronics, Inc. Drum type washing machine
US8220294B2 (en) 2005-09-30 2012-07-17 Lg Electronics Inc. Drum-type washing machine
US8429938B2 (en) 2004-07-20 2013-04-30 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2272913A (en) * 1992-11-26 1994-06-01 Caradon Rolinx Tub for a top-loading washing machine
EP2298979B1 (de) 2002-12-27 2014-04-09 LG Electronics Inc. Trommelwaschmaschine
US7536882B2 (en) 2006-03-29 2009-05-26 Lg Electronics Inc. Drum type washing machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1067355B (it) * 1976-08-02 1985-03-16 Eurodomestici Ind Riunite Vasca per macchina lavabiancheria

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8156770B2 (en) 2002-12-27 2012-04-17 Lg Electronics, Inc. Drum type washing machine
US8887537B2 (en) 2002-12-27 2014-11-18 Lg Electronics Inc. Drum-type washing machine
US8646292B2 (en) 2002-12-27 2014-02-11 Lg Electronics Inc. Drum type washing machine
US8616027B2 (en) 2002-12-27 2013-12-31 Lg Electronics Inc. Drum type washing machine
US8302434B2 (en) 2002-12-27 2012-11-06 Lg Electronics Inc. Drum-type washing machine
US8322170B2 (en) 2002-12-27 2012-12-04 Lg Electronics Inc. Drum-type washing machine
US8336340B2 (en) 2002-12-27 2012-12-25 Lg Electronics Inc. Drum-type washing machine
US8336339B2 (en) 2002-12-27 2012-12-25 Lg Electronics Inc. Drum type washing machine
US8341983B2 (en) 2002-12-27 2013-01-01 Lg Electronics Inc. Drum-type washing machine
US8387421B2 (en) 2002-12-27 2013-03-05 Lg Electronics Inc. Drum-type washing machine
US8429938B2 (en) 2004-07-20 2013-04-30 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
US8434334B2 (en) 2004-07-20 2013-05-07 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
US8677787B2 (en) 2004-07-20 2014-03-25 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
US8726702B2 (en) 2004-07-20 2014-05-20 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
US8783072B2 (en) 2004-07-20 2014-07-22 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
US8800326B2 (en) 2004-07-20 2014-08-12 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
US8887538B2 (en) 2004-07-20 2014-11-18 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
US8931312B2 (en) 2004-07-20 2015-01-13 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
US8234890B2 (en) 2005-09-30 2012-08-07 Lg Electronics Inc. Drum-type washing machine
US8225628B2 (en) 2005-09-30 2012-07-24 Lg Electronics Inc. Drum-type washing machine
US8671718B2 (en) 2005-09-30 2014-03-18 Lg Electronics Inc. Drum-type washing machine
US8220294B2 (en) 2005-09-30 2012-07-17 Lg Electronics Inc. Drum-type washing machine

Also Published As

Publication number Publication date
EP0212259A3 (en) 1987-10-21
ATE41181T1 (de) 1989-03-15
DE3662282D1 (en) 1989-04-13
EP0212259A2 (de) 1987-03-04
ES2000513A6 (es) 1988-03-01

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