EP0405068B1 - Reinforced tub, particularly for laundry washing machines - Google Patents

Reinforced tub, particularly for laundry washing machines Download PDF

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Publication number
EP0405068B1
EP0405068B1 EP90106471A EP90106471A EP0405068B1 EP 0405068 B1 EP0405068 B1 EP 0405068B1 EP 90106471 A EP90106471 A EP 90106471A EP 90106471 A EP90106471 A EP 90106471A EP 0405068 B1 EP0405068 B1 EP 0405068B1
Authority
EP
European Patent Office
Prior art keywords
tub
edge
reinforced
bottom edge
tub body
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
EP90106471A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0405068A1 (en
Inventor
Antonio Dr. Merloni
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.)
Antonio Merloni SpA
Original Assignee
Antonio Merloni 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
Application filed by Antonio Merloni SpA filed Critical Antonio Merloni SpA
Publication of EP0405068A1 publication Critical patent/EP0405068A1/en
Application granted granted Critical
Publication of EP0405068B1 publication Critical patent/EP0405068B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D06F37/263—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
    • D06F37/264—Tubs provided with reinforcing structures, e.g. ribs, inserts, braces

Definitions

  • the present invention relates to a reinforced tub, particularly for laundry washing machines.
  • the known washing machines are generally provided with a horizontal rotary drum contained in a fixed tub to be loaded with laundry at the front side or from above.
  • the tub has a detachable wall for assembling the drum inside the tub and for the possible disassembling of the drum for repairing.
  • the detachable wall is usually secured to the tub body by means of a fastening strip, of truncated-cone shape, that tightens a gasket between the tub body and the back wall, providing a water tight seal during the operation of the machine.
  • a fastening system of the kind described above ensures that the two tub portions, the back wall and the tub body, remain integral and endure the remarkable mechanical stresses caused by the drum motion, especially during centrifugation.
  • tubs are usually made of stainless steel and, since this material is relatively expensive, there has been a trend to reduce as much as possible the thickness of the tub, by means of several contrivances.
  • the tub edge is made of an excessively thin sheet, the washing and centrifugation stresses bend and warp the sheet at the junction, causing the offset of the drum and water leaks, the back wall and the tub body not being securely integral.
  • the back wall is sometimes fastened to the tub body by means of a cast iron cross member lying outside the back wall and fastened to the junction edge.
  • This system raises the production cost of the washing machine because of the greater number of assembling operations and of component parts, and furthermore raises the weight of the tub.
  • the main aim of the present invention is to provide a reinforced tub for washing machines having such a fastening system of the tub body to the back wall to allow the use of thinner sheets for its construction, without jeopardizing the component parts resistance to the mechanical stress and the watertightness.
  • an object of the invention is to provide a reinforced tub easily, and therefore economically, produced from an industrial point of view.
  • a further object of the invention is to provide a reinforced tub having a long life and reliable fastening system between the tub body and the back wall, in terms of watertightness and mechanical resistance.
  • a reinforced tub particularly for laundry washing machines, comprising a back wall associated with a tub body, said tub body having a substantially cylindrical shape and comprising a bottom edge, characterized in that the bottom edge comprises a further stiffening edge rigidly associated with said bottom edge.
  • the tub generally designated by the reference numeral 1 and adapted to contain a drum 14, comprises a tub body 2 and a back wall 3.
  • the tub body generally has a cylindrical shape and is formed from a flat sheet 2a, illustrated in Fig. 3, bent and joined along the edges 2b, as illustrated in Fig. 4.
  • the back wall 3 is fastened to the tub body bottom edge 4 which is conveniently bent to have a radial portion 5 adapted to cooperate with a similar radial portion 6 formed on the periphery of the back wall 3.
  • a gasket 7 is first interposed between the bottom edge 4 of the tub body 2 and the portion 6 of the back wall 3, and subsequently a fastening ring 8 is applied to fasten the back wall to the tub body.
  • the bottom edge 4 of the tub body is reinforced by means of a stiffening edge 9.
  • Figs. 5-7 show some of the possible shapes of the stiffening edge which may extend either almost exclusively within the radial portion 5 (the edge 4a of Fig.5), or beyond the radial portion 5 covering part of the tub body (edges 4b and 4c of Figs. 6 and 7).
  • the stiffening edge 9 is advantageously provided by bending the sheet 2a when it is still flat (Fig. 3), before the shaping operations, and optionally by welding it in order to ease the subsequent workings.
  • the edge 9 can also be provided by simply welding a sheet metal to the radial portion 5, without bending the bottom edge 4 of the tub.
  • An advantage of the invention is also due to the easy shaping operations for manufacturing the tub, and particularly for forming the stiffening edge, that do not further complicate the production cycle.
  • the reinforced tub according to the invention may have numerous modifications and variations, all within the inventive concept; furthermore, all the details may be substituted with technically equivalent elements.
  • the materials employed, as well as the dimensions, may be any according to the specific needs and the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
EP90106471A 1989-06-29 1990-04-04 Reinforced tub, particularly for laundry washing machines Expired - Lifetime EP0405068B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8921025A IT1230168B (it) 1989-06-29 1989-06-29 Vasca rinforzata, particolarmente per macchine lavabiancheria.
IT2102589 1989-06-29

Publications (2)

Publication Number Publication Date
EP0405068A1 EP0405068A1 (en) 1991-01-02
EP0405068B1 true EP0405068B1 (en) 1994-06-22

Family

ID=11175578

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90106471A Expired - Lifetime EP0405068B1 (en) 1989-06-29 1990-04-04 Reinforced tub, particularly for laundry washing machines

Country Status (4)

Country Link
EP (1) EP0405068B1 (it)
DE (1) DE69010088T2 (it)
ES (1) ES2055206T3 (it)
IT (1) IT1230168B (it)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7827834B2 (en) 2005-09-30 2010-11-09 Lg Electronics Inc. Bearing housing assembly of drum-type washing machine and drum-type washing machine with the same
US7841220B2 (en) 2005-09-30 2010-11-30 Lg Electronics Inc. Drum-type washing machine
US8087267B2 (en) 2002-12-27 2012-01-03 Lg Electronics Inc. Drum type washing machine
USRE43625E1 (en) 2006-03-29 2012-09-04 Lg Electronics Inc. Drum type washing machine
US8302434B2 (en) 2002-12-27 2012-11-06 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 (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2004203022B2 (en) * 2003-07-08 2010-01-28 Lg Electronics Inc. Drum-type washing machine
KR100987434B1 (ko) 2003-07-08 2010-10-13 엘지전자 주식회사 드럼세탁기용 터브
ES2296424B1 (es) * 2004-02-06 2008-12-16 Bsh Electrodomesticos España S.A. Refuerzo para tambor de maquina lavadora.
DE102021205433A1 (de) 2021-05-28 2022-12-01 BSH Hausgeräte GmbH Laugenbehälter mit spezifischem Verbindungsbereich zwischen einem Hohlzylinder und einer Rückwand, sowie Haushaltsgerät

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2633604A1 (de) * 1976-07-27 1978-02-02 Licentia Gmbh Trommelbehaelter fuer eine stirnbeschickbare waschmaschine
IT1174950B (it) * 1983-07-29 1987-07-01 Zanussi A Spa Industrie Vasca in acciaio inossidabile per macchine lavabiancheria

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8671719B2 (en) 2002-12-27 2014-03-18 Lg Electronics Inc. Drum type washing machine
US8336340B2 (en) 2002-12-27 2012-12-25 Lg Electronics Inc. Drum-type washing machine
US8887537B2 (en) 2002-12-27 2014-11-18 Lg Electronics Inc. Drum-type washing machine
US8646293B2 (en) 2002-12-27 2014-02-11 Lg Electronics Inc. Drum type washing machine
US8341983B2 (en) 2002-12-27 2013-01-01 Lg Electronics Inc. Drum-type washing machine
US8087267B2 (en) 2002-12-27 2012-01-03 Lg Electronics Inc. Drum type washing machine
US8387421B2 (en) 2002-12-27 2013-03-05 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
US8336339B2 (en) 2002-12-27 2012-12-25 Lg Electronics Inc. Drum type washing machine
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
US8931312B2 (en) 2004-07-20 2015-01-13 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
US8429938B2 (en) 2004-07-20 2013-04-30 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
US8800326B2 (en) 2004-07-20 2014-08-12 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
US8783072B2 (en) 2004-07-20 2014-07-22 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
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
US7827834B2 (en) 2005-09-30 2010-11-09 Lg Electronics Inc. Bearing housing assembly of drum-type washing machine and drum-type washing machine with the same
US7841220B2 (en) 2005-09-30 2010-11-30 Lg Electronics Inc. Drum-type washing machine
US8220294B2 (en) 2005-09-30 2012-07-17 Lg Electronics Inc. Drum-type washing machine
US8234890B2 (en) 2005-09-30 2012-08-07 Lg Electronics Inc. Drum-type washing machine
USRE44795E1 (en) 2006-03-29 2014-03-11 Lg Electronics Inc. Drum type washing machine
USRE44674E1 (en) 2006-03-29 2013-12-31 Lg Electronics Inc. Drum type washing machine
USRE44511E1 (en) 2006-03-29 2013-10-01 Lg Electronics Inc. Drum type washing machine
USRE43625E1 (en) 2006-03-29 2012-09-04 Lg Electronics Inc. Drum type washing machine
USRE44028E1 (en) 2006-03-29 2013-02-26 Lg Electronics Inc. Drum type washing machine

Also Published As

Publication number Publication date
DE69010088T2 (de) 1995-03-02
IT8921025A0 (it) 1989-06-29
IT1230168B (it) 1991-10-14
EP0405068A1 (en) 1991-01-02
DE69010088D1 (de) 1994-07-28
ES2055206T3 (es) 1994-08-16

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