EP0132805A2 - Cuve en acier inoxydable pour machine à laver le linge - Google Patents

Cuve en acier inoxydable pour machine à laver le linge Download PDF

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Publication number
EP0132805A2
EP0132805A2 EP84108623A EP84108623A EP0132805A2 EP 0132805 A2 EP0132805 A2 EP 0132805A2 EP 84108623 A EP84108623 A EP 84108623A EP 84108623 A EP84108623 A EP 84108623A EP 0132805 A2 EP0132805 A2 EP 0132805A2
Authority
EP
European Patent Office
Prior art keywords
tub
peripheral wall
secured
support means
wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP84108623A
Other languages
German (de)
English (en)
Other versions
EP0132805B1 (fr
EP0132805A3 (en
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.)
OFFERTA DI LICENZA AL PUBBLICO
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
Application filed by Industrie Zanussi SpA filed Critical Industrie Zanussi SpA
Priority to AT84108623T priority Critical patent/ATE42588T1/de
Publication of EP0132805A2 publication Critical patent/EP0132805A2/fr
Publication of EP0132805A3 publication Critical patent/EP0132805A3/en
Application granted granted Critical
Publication of EP0132805B1 publication Critical patent/EP0132805B1/fr
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
    • D06F37/263—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
    • 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
    • D06F37/265—Counterweights mounted to the tub; Mountings therefor

Definitions

  • the present invention relates to a stainless steel washing tub for a domestic laundry washing machine of the top loading type.
  • the type of laundry washing machines defined above is normally provided with a metal tub substantially composed of a cylindrical peripheral wall adapted to surround a rotating drum and formed with an opening for access to the drum, and a pair of circular end closure walls welded or mechanically secured to the ends of the peripheral wall.
  • tub of this type Welded to the outer periphery of a tub of this type are metal lugs adapted to be engaged by elements employed in the suspension and equilibration of the tub and for dampening the oscillations thereof during operation of the machine. In this manner the tub of this type performs not only the functions of a container, but also the functions of a structural member for engagement with the named elements.
  • washing tub involves the formation of numerous weld seams which may give rise to the occurrence of corrosion and thus to a progressive degradation of the material of the tub and its components, resulting in a reduction of their mechanical strength.
  • the present invention has for its object the elimination D f the described shortcomings by providing a stainless steel washing tub for a laundry washing machine constructed so as to relieve the peripheral wall and the end walls of the tub of any functions as a carrying structure for the elements used in the suspension and equilibration of the tub and for dampening the oscillations of the components participating in the laundering process, and to thus enable the peripheral wall and the two end walls to be dimensioned for solely carrying out a function as a container for the washing drum and the washing liquid.
  • a stainless steel washing tub for a domestic washing machine particularly of the top-loading type, comprising a cylindrical peripheral wall formed with an opening for access to a rotatable washing drum, and a pair of end closure walls secured to respective lateral ends of said peripheral wall.
  • first support means are secured to one side of the tub by means of a stiffener ring projecting outwards of the tub and secured thereto adjacent the junction between the peripheral wall and one of the end closure walls.
  • Second support means are secured at the other side of the tub to crimped edge portions of the peripheral wall and the other end closure wall, with the interposition of a sealing gasket therebetween.
  • Thir support means are secured to both sides of the tub in combination with the said first and second support means.
  • the elements used in the suspension, for equilibration and for dampening oscillations of the tub are connected to two metallic plate members secured respectively to the sides of the tub for absorbing the mechanical loads exerted during transport and operation of the laundry washing machine.
  • connection lugs or similar elements as in the case of the presently employed manufacturing methods.
  • the tub according to the invention may advantageously be formed of stainless steel components having considerably reduced wall thickness, offering at the same time the advantages of improved resistance against corrosion and improved operational reliability.
  • a domestic laundry washing machine 8 of the top-loading type comprising a housing 9, a washing tub 10 and a washing drum 11 rotatably mounted within tub 10, the latter being mounted within housing 9 by means of resilient upper suspension elements 12 and lower vibration dampener elements 13.
  • tub 10 ist formed of stainless steel sheet of reduced wall thickness and comprises a cylindrical peripheral wall 14 and a pair of lateral end closure walls 15 and 16 secured to peripheral wall 14 and formed with a central opening 17 and 18, respectively, for passage therethrough of the end portions of a shaft 19 carrying drum 11.
  • FIG. 2 and 3 Shown in figs. 2 and 3 on an enlarged scale are details of the junction between peripheral wall 14 and a respective one of end closure walls 15 and 16. As evident from fig. 3, end wall 16 is secured to peripheral wall 14 together with a circular stiffener ring 20 formed of a base metal and having a greater wall thickness than peripheral wall 14 and end closure walls 15 and 16, as specified above.
  • stiffener ring 20 is formed to present a cross-sectional shape including a planar portion 21 projecting outwards of tub 10 and a bent portion 22 crimped onto the similarly crimped edge portions of peripheral wall 14 and end wall 16, with suitable sealing elements (not shown) interposed therebetween. Adjacent the other side of tub 10, the edge portions of end wall 15 and peripheral wall 14 are in contact with one another, with a sealing gasket 27 interposed therebetween, and clampingly retained between an edge portion of a metal support plate member 23 (figs. 1 and 2) and a bar 25 provided for connecting the tub, and thus the drum contained therein, to the lower vibration dampening elements 13.
  • the above named members are each provided with openings for the passage of fastener elements 26.
  • peripheral edge portion of end wall 15 projects outwards of the tub and is of L-shaped cross-sectional configuration adapted to accommodate the above mentioned sealing gasket 27, itself of triangular cross-sectional shape, while the edge portion of peripheral wall 14 is of a complementary cross-sectional shape including an outermost portion extending parallel to that of end wall 15 and an inwards adjacent inclined portion cooperating with an inwards directed angle of the edge portion of end wall 15 to enclose and compress sealing gasket 27 retained therebetween.
  • This sealing gasket has a substantially triangular cross-sectional shape adapted to substantially fill the interstice between the edge portions of peripheral wall 14 and end wall 15 when compressed therebetween by the action of the inclined portion of peripheral wall 14 and the tightening of fastener element 26.
  • support plate member 23 is made of a base metal and is substantially flat, with a central reentrant portion provided with a circular opening being formed opposite central opening 17 of end wall 15.
  • a further metal support plate member 28 similar to plate member 23 is bolted to the stiffener ring 20, with another leg 24 of bar member 25 interposed therebetween, stiffener ring 20 itself being secured to peripheral wall 14 and end wall 16 of tub 10, as explained above.
  • the portions of support plate member 28 engaging stiffener ring 20 are formed with an outwards offset profile 30 having an end portion adapted to contact planar portion 21 of stiffener ring 20 and to be secured thereto by means of fastener elements 29 such as rivets, bolts or the like.
  • Support plate members 23 and 28 are preferably of triangular shape as shown in fig. 4, and dimensioned so as to be able to effectively support the tub-drum assembly and/or respective counterweights 31, 32 formed for instance of a cement compound and provided for the dynamic equilibration of the assembly.
  • a support collar 34, 35 is bolted to the outer side of the respective plate member for accommodating a respective bearing of the shaft 19 carrying drum 11.
  • each triangular plate member 23, 28 Adjacent its upper end each triangular plate member 23, 28 is formed with a through- opening 36 (fig. 4) for connection thereto of a respective one of the above mentioned upper suspension elements 12, while the intermediate portions of each plate member between the apices thereof and the central opening are formed with three openings 37 permitting the dynemic equilibration counterweights 31, 32 to be secured thereto.
  • the plate members which may for instance be made of aluminum, may be of a three-armed star-shaped configuration as shown in fig. 5, and integrally formed with the bearing support collars described above.
  • the plate members may be formed of cast iron, in which case they may assume the additional function of dynamic equilibration elements.
  • Diagrammtically shown in figs. 3 and 4 is also the lower part of the tub according to the invention, whereat a forward bar 38 and a rearward bar 25 are secured to the planar portion 21 of stiffener ring 20 and to the edge portion of peripheral wall 14 by means of bolts or the like for connecting the tub-drum assembly to the vibration dampener elements 13.
  • the forward bar 38 additionally cooperates with the support of a motor 40 driving drum 11 together with a lug 41 located adjacent rearward bar 25 and permitting the tension of a transmission belt to be adjusted.
  • each bar 28 and 23 Projecting in a downward direction towards the lowermost part of the laundry washing machine from the central portion of each bar 28 and 23 is a lug 42 adapted to cooperate with the respective vibration dampener element 13 secured to the bottom of the machine for dampening the vibrations of the tub-drum assembly.
  • a belt drive connection between a pulley 46 of motor 40 and a pulley 48 releasably secured to shaft 19 for rotating drum 11.
  • the end portion of tub 10 facing towards the described drive connection i.e. the end portion thereof formed of plate member 23 and end wall 15, is capable of being disassembled by releasing the respective bolted connections between the various components for giving access to the interior of the tub-drum assembly.
  • the tub 10 according to the invention permits considerable savings of stainless steel to be achieved thanks to the fact that the function of structural carrying members is taken over by the stiffener ring 20 and the support plate members 23 and 28.
  • the assembly of the entire tub-drum assembly does not require any welding operations to be carried out, the assembly being accomplished by simple crimping operations and by measn of fastener elements in the form of bolts and nuts or the like.
  • the invention eliminates the danger of corrosion of the tub 10 and permits the assembyl thereof to be carried out by largely automatized manufacturing procedures.
  • tub according to the invention facilitates the inspection of the interior of the tub and the replacement of any parts found to be defective on such inspection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Metal Extraction Processes (AREA)
  • Chemical Treatment Of Metals (AREA)
EP84108623A 1983-07-29 1984-07-20 Cuve en acier inoxydable pour machine à laver le linge Expired EP0132805B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84108623T ATE42588T1 (de) 1983-07-29 1984-07-20 Laugenbehaelter aus rostfreiem stahl fuer waschmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT45721/83A IT1174950B (it) 1983-07-29 1983-07-29 Vasca in acciaio inossidabile per macchine lavabiancheria
IT4572183 1983-07-29

Publications (3)

Publication Number Publication Date
EP0132805A2 true EP0132805A2 (fr) 1985-02-13
EP0132805A3 EP0132805A3 (en) 1986-07-23
EP0132805B1 EP0132805B1 (fr) 1989-04-26

Family

ID=11257687

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84108623A Expired EP0132805B1 (fr) 1983-07-29 1984-07-20 Cuve en acier inoxydable pour machine à laver le linge

Country Status (5)

Country Link
EP (1) EP0132805B1 (fr)
AT (1) ATE42588T1 (fr)
DE (1) DE3477944D1 (fr)
ES (1) ES280392Y (fr)
IT (1) IT1174950B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0318120A1 (fr) * 1987-11-27 1989-05-31 Bauknecht Hausgeräte GmbH Cuve pour machines à laver
EP0405068A1 (fr) * 1989-06-29 1991-01-02 ANTONIO MERLONI S.p.A. Cuve renforcée, notamment pour machines à laver le linge
EP0578845A1 (fr) * 1992-07-14 1994-01-19 WASCHGERÄTE GmbH i.L. Machine à laver à tambour
GB2294952A (en) * 1994-11-08 1996-05-15 Electrolux Zanussi Elettrodome Washing machine structure
EP1688525A1 (fr) * 2005-02-05 2006-08-09 Samsung Electronics Co, Ltd Machine à laver à tambour avec masse d'équilibrage
US7533548B2 (en) 2002-12-27 2009-05-19 Lg Electronics Inc. Drum type washing machine
US7568366B2 (en) 2004-07-20 2009-08-04 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2302124A3 (fr) 2002-12-27 2013-01-09 LG Electronics Inc. Machine à laver à tambour
US7841220B2 (en) 2005-09-30 2010-11-30 Lg Electronics Inc. Drum-type washing machine
KR100651853B1 (ko) 2005-09-30 2006-12-01 엘지전자 주식회사 인서트사출형 베어링하우징조립체 및 이를 구비한캐비넷/터브 일체형 드럼세탁기
US7536882B2 (en) 2006-03-29 2009-05-26 Lg Electronics Inc. Drum type washing machine
ES2332440B1 (es) * 2008-03-03 2011-01-31 Bsh Electrodomesticos España, S.A. Tambor de lavado para una maquina lavadora y procedimiento para la fabricacion de dicho tambor de lavado.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1215057A (fr) * 1958-10-31 1960-04-13 Esswein & Cie Cuve pour machine à laver
DE2633604A1 (de) * 1976-07-27 1978-02-02 Licentia Gmbh Trommelbehaelter fuer eine stirnbeschickbare waschmaschine
DE2719452A1 (de) * 1977-04-30 1978-11-02 Miele & Cie Wasch- und schleudermaschine mit am laugenbehaelter befestigten ballastgewichten
DE2719336A1 (de) * 1977-04-30 1978-11-09 Miele & Cie Wasch- und schleudermaschine
GB2096649A (en) * 1981-04-15 1982-10-20 Candy Ind Spa Tub unit for a washing machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1215057A (fr) * 1958-10-31 1960-04-13 Esswein & Cie Cuve pour machine à laver
DE2633604A1 (de) * 1976-07-27 1978-02-02 Licentia Gmbh Trommelbehaelter fuer eine stirnbeschickbare waschmaschine
DE2719452A1 (de) * 1977-04-30 1978-11-02 Miele & Cie Wasch- und schleudermaschine mit am laugenbehaelter befestigten ballastgewichten
DE2719336A1 (de) * 1977-04-30 1978-11-09 Miele & Cie Wasch- und schleudermaschine
GB2096649A (en) * 1981-04-15 1982-10-20 Candy Ind Spa Tub unit for a washing machine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0318120A1 (fr) * 1987-11-27 1989-05-31 Bauknecht Hausgeräte GmbH Cuve pour machines à laver
EP0405068A1 (fr) * 1989-06-29 1991-01-02 ANTONIO MERLONI S.p.A. Cuve renforcée, notamment pour machines à laver le linge
EP0578845A1 (fr) * 1992-07-14 1994-01-19 WASCHGERÄTE GmbH i.L. Machine à laver à tambour
GB2294952A (en) * 1994-11-08 1996-05-15 Electrolux Zanussi Elettrodome Washing machine structure
GB2294952B (en) * 1994-11-08 1998-02-18 Electrolux Zanussi Elettrodome Washing machine with improved structure
US7533548B2 (en) 2002-12-27 2009-05-19 Lg Electronics Inc. Drum type washing machine
US7571625B2 (en) 2002-12-27 2009-08-11 Lg Electronics Inc. Drum type washing machine
US7568366B2 (en) 2004-07-20 2009-08-04 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
EP1688525A1 (fr) * 2005-02-05 2006-08-09 Samsung Electronics Co, Ltd Machine à laver à tambour avec masse d'équilibrage

Also Published As

Publication number Publication date
EP0132805B1 (fr) 1989-04-26
IT8345721A0 (it) 1983-07-29
ES280392Y (es) 1985-07-16
IT8345721A1 (it) 1985-01-29
IT1174950B (it) 1987-07-01
ES280392U (es) 1985-01-16
DE3477944D1 (en) 1989-06-01
ATE42588T1 (de) 1989-05-15
EP0132805A3 (en) 1986-07-23

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