EP1673501A2 - Cuve en plastique pour lave-linge ou seche-linge - Google Patents

Cuve en plastique pour lave-linge ou seche-linge

Info

Publication number
EP1673501A2
EP1673501A2 EP04787052A EP04787052A EP1673501A2 EP 1673501 A2 EP1673501 A2 EP 1673501A2 EP 04787052 A EP04787052 A EP 04787052A EP 04787052 A EP04787052 A EP 04787052A EP 1673501 A2 EP1673501 A2 EP 1673501A2
Authority
EP
European Patent Office
Prior art keywords
housing
end wall
bearing
drum
reinforcing ribs
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.)
Withdrawn
Application number
EP04787052A
Other languages
German (de)
English (en)
Inventor
Otto Kaulbersch
Ute Kreuziger
Ulf Sauerwald
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.)
Wirthwein AG
Original Assignee
Wirthwein AG
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 Wirthwein AG filed Critical Wirthwein AG
Publication of EP1673501A2 publication Critical patent/EP1673501A2/fr
Withdrawn legal-status Critical Current

Links

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
    • D06F37/26—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
    • D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
    • D06F37/269—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups for the bearing of the rotary receptacle

Definitions

  • the invention relates to a plastic tub for a washing machine or dryer, in which a drivable drum with a substantially horizontal shaft can be stored, comprising a wall with at least one end wall, which is integrally provided with a plurality of radially and concentrically extending reinforcing ribs, the bearings have a seat in a housing that is arranged in a form-fitting manner in the end wall and the special use of a GRP polyamide for storing a drum in washing machines or dryers.
  • a tub of this type which encloses a rotating drum for the laundry to be treated, usually consists of a cylinder with a substantially horizontal axis, which has a jacket and two end walls.
  • the opening for filling and removing the laundry is provided on the front wall of the tub, while the seats for the bearings of the drum shaft are installed in the rear wall; in the top loaders, the opening for the laundry is provided on the jacket and the bearings are preferably arranged on the front and rear walls.
  • a tub has to be designed in such a way that it fulfills functional requirements such as durability against the mechanical loads transmitted by the drum, water resistance and corrosion resistance for such a long period of time. Furthermore, the suds container must be suitable for production and recycling, both from a strictly technical and economic point of view, when the washing machine has reached the end of its service life.
  • DE 298 21 140 U1 discloses the use of a tub made of plastic by injection molding. It is manufactured in highly automated manufacturing processes and also allows recycling. A tub of this type is made using a single plastic, apart from that
  • the wall with the seat for the bearings is not flat, but instead has one-piece reinforcement elements with the wall, which are produced during injection molding.
  • Polypropylene reinforced with glass fibers is used as the material, the reinforcing elements being designed both as radially arranged ribs with crossing points and concentrically extending around a bearing hub.
  • EP 0 219 115 B1 proposes integrating the necessary ball bearings and their spacer rings in a multi-step, repeated injection molding process into the washing container in a glass fiber reinforced polyester hub of a plastic washing container. This manufacturing process is naturally complex and costly.
  • the document DE 100 40 319 C1 provides an intermediate route in which a tub with a hub, a first ball bearing integrally injected therein and a further ball bearing has been inserted into a partial bearing housing which is connected to the hub by gluing or welding.
  • a bearing housing with bushing and contact collar made of glass fiber reinforced polypropylene, polyacetal or polyamide can be positively arranged in a container wall made of glass fiber reinforced polypropylene for ball bearings by means of a bayonet lock.
  • the design according to the document DE 31 42 295 A1 is similar, the ball bearing here being pressed into the housing.
  • the bearing housing Since in both cases the eccentrically designed bearing housing can be rotated to adjust the belt tension of the rotary drive, the bearing housing has corresponding play and is also only partially durable due to the large number of fastening parts for the rotating shaft and the drum.
  • the invention is based on the problem of proposing an improved suds container for washing machines or dryers with bearings for roller bearings, which is simpler and cheaper to produce, but nevertheless guarantees the highest functional performance mentioned and both for front loading machines and for Top loading machines are suitable.
  • the features according to the invention include, in a first solution, an end wall in the area of the housing which is provided in one piece with a plurality of reinforcing ribs which extend concentrically to the axis of the drum shaft and which extend radially away from the axis and which serve to support a e.g. Can be attached to the end wall by means of screws and manufactured separately
  • Serve housing for receiving at least one rolling bearing.
  • Parts of the housing should preferably press / under friction / shrink fit on at least parts of the ribs, on a concentric rib under ring tension.
  • the outside of the housing and the complementary reinforcement rib of the end wall in the opening for the seat of the drum shaft should form a press fit at least in the area of the seat of the roller bearing or the bushing part, so that excellent power transmission from the drum shaft via the bearings and the housing to the end wall is possible is.
  • the concentric and the radial reinforcing ribs have crossing points in the area of the housing, in which there are at least three or more through holes for screws on at least one of the concentric reinforcing ribs, if the load or the deformation resistance of the housing so requires, which pass through the housing in the end wall be screwed in and thus fix the housing axially next to the frictional connection by means of a press fit, while it is held in a radially positive manner by the concentric rib.
  • the plastic tub should be made of softer and cheaper material than the housing, preferably made of glass fiber reinforced polypropylene, while the housing is made of polyamide reinforced with about 40 - 70% filling of glass fibers, preferably nylon with at least 50% glass fiber filling.
  • the second solution of the invention relates to the use of polyamide reinforced with at least 50% glass fiber filling and having a tensile strength of greater than 150 N / mm 2 for bearing housings made separately by injection molding and which can be pressed into a front wall of a tub made of softer plastic for roller bearings which can be used therein a shaft of a drivable drum in a washing machine or dryer.
  • the bearing is preferably pre-assembled before the housing is pressed into the tub.
  • Figure 1 is a perspective view of the rear wall of a plastic tub for a top loading washing machine.
  • Figure 2 shows a view of the same part of the tub of Figure 1, but with the bearing housing inserted;
  • Fig. 3 is a view similar to Fig. 1, 2, but with a partial section through the prepositioned parts for assembly.
  • FIG. 1 shows an embodiment of the invention, a section of a tub, an end wall 1 with the storage area for the shaft of a washing drum or dryer drum.
  • front loaders one has such an end wall in which the drum shaft is mounted twice, while in top loaders two end walls of the washing container or lye container arranged on both sides of the drum, each with a bearing, preferably a roller bearing, usually ball bearings, are provided for the shaft.
  • a bearing preferably a roller bearing, usually ball bearings
  • the shaft, not shown, with axis 7 is arranged in the opening 71.
  • the breakthrough is provided according to the invention with concentrically arranged reinforcing ribs or inner rings 2, 3, 4, 5 and, if necessary and with a corresponding load, also with further ribs such as rib 6 (FIG. 3).
  • radially reinforcing ribs 8, 10, 12, 14, 16 extend over the end wall. Each of these ribs 8, 10, 12, 14, 16 forms with the middle concentric reinforcing rib 3 a crossing point.
  • a bore 31-36 with a thread is made in at least three of these crossing points for receiving a fastening screw (not shown) for a bearing housing 100 (FIG. 2). These bores are designed in the manner of a screw dome and preferably extend over most of the rib depth (FIG. 3).
  • Further wall-reinforcing ribs 11 extend radially outward from the outermost concentric reinforcing rib 4.
  • One or more parts of a concentric rib, here reinforcing rib 3 have a mounting nipple 30 for precise positioning of the bearing housing.
  • FIGS. 2, 3 show the housing 100, designed as a bushing 102 with collar 101, for a roller bearing 23 in the preassembled state in the desired position.
  • two bearings would be arranged at a distance from one another, in which the shaft that holds the drum flying is mounted.
  • the housing is exactly positioned by mounting nipple 30, which projects into an opening 130 of the housing.
  • Recesses 111 - 116 serve to save weight and increase the flexibility of the collar 101, which is fixed by screws, inserted into the holes 132 -136, of which at least three are arranged on the circumference of the collar of the housing 100.
  • the holes are aligned with corresponding threaded bores 32-36 in the end wall 1.
  • the collar When the screws are fixed, the collar is supported on the rib parts 161, 162 of the rib 16 and the other ribs next to the bores 32-36.
  • a further indirect support is provided by the housing 100 at the end of the socket part 102 on the rib 2, a sealing washer 21 and an O-ring or another seal 22 being arranged between the end 106 of the socket and the rib 2.
  • the bushing 102 is inserted by shrinking into the end wall 1, which has been heated to, for example, 70 ° C., so that it contacts the rib 2 in many cases under ring tension before the screws (not shown) fix the housing, which is now immobile in the radial direction, in a positive manner in the axial direction.
  • shrinking there is also a mechanical one Pressing in the housing or a combined heating / shrinking and pressing in possible.
  • the decisive factor here is the combination of materials chosen by the specialist, their strength and elasticity.
  • the bearing 23 is press-fitted with its outer ring, manufactured as described for the bushing, to the bushing 102 in the passage 71 for the shaft of the drum.
  • the wall thickness of the socket is designed to be correspondingly thick, while the collar 101 is designed to be thinner and more flexible for effectively bracing the housing.
  • slight radii are applied between the collar and bushing of the housing 100 and the angle between the collar surface and the bushing inner surface 105 can be slightly greater than 90 °.
  • the flank angle of the surface 105 and the surface of the rib 5 should be identical.
  • the slightly inclined surface arrangement facilitates the molding of the parts from injection molds in which both the housing 100 and the end wall 1 are injection molded and the pressing of the parts into one another or the bearing 23 into the bushing 102.
  • a material that is harder and stiffer than the end wall is used as the material for the housing.
  • Tests have shown that a polyamide is most suitable for the housing 100, with about 50%, generally 40-70% glass fibers being added to the plastic for reinforcement.
  • the material can be easily processed by injection molding.
  • the polyamide used, a nylon or the like, is available as a raw product from ASAHI KASAI, Hampshire, UK under product names such as Thermofil, types 90G50 or AMC 50 or AMG 50. Contrary to usual
  • the grid-like structure in the bearing area which is formed by the concentric ribs that cross with the radial ribs, is robust enough to withstand all mechanical loads that are transferred from the rotating drum to the tub while the washing machine is in operation.
  • the decisive factor is probably the direct application of force from the drum shaft via the pressed-in ball bearing, via the pressed-in and screwed, i.e. frictionally and positively fastened, housing into the end wall of the tub.

Landscapes

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

Abstract

L'invention concerne une cuve en plastique pour un lave-linge ou un sèche-linge, dans laquelle est monté un tambour à entraînement pourvu d'un arbre sensiblement horizontal, laquelle cuve présente une paroi pourvue d'au moins une paroi frontale à plusieurs nervures de renforcement radiales ou concentriques, les paliers ayant un siège dans un logement placé en liaison de forme dans la paroi frontale. Cette invention concerne également l'utilisation spécifique d'un polyamide renforcé de fibres de verre pour des paliers d'un tambour dans des lave-linge ou sèche-linge ainsi que l'utilisation spécifique d'un polyamide renforcé de fibres de verre de haute résistance à la traction pour le logement de palier d'un tambour dans des lave-linge ou sèche-linge. La paroi frontale au niveau du logement, conçu sous la forme d'un coussinet à épaulement, est pourvue de plusieurs nervures de renforcement s'étendant concentriquement à l'axe de l'arbre du tambour et plusieurs nervures s'écartant de l'axe en sens radial, lesquelles nervures servent à soutenir le logement de réception de palier, fabriqué séparément et pouvant être fixé à la paroi frontale au moyen de vis, ledit logement formant, avec une nervure de renforcement complémentaire de la paroi frontale, un ajustement serré au moins dans la zone du siège du palier à roulement ou de la partie coussinet.
EP04787052A 2003-09-30 2004-09-29 Cuve en plastique pour lave-linge ou seche-linge Withdrawn EP1673501A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003145848 DE10345848A1 (de) 2003-09-30 2003-09-30 Laugenbehälter für Waschmaschinen oder Trockner aus Kunststoff
PCT/EP2004/010896 WO2005033400A2 (fr) 2003-09-30 2004-09-29 Cuve en plastique pour lave-linge ou seche-linge

Publications (1)

Publication Number Publication Date
EP1673501A2 true EP1673501A2 (fr) 2006-06-28

Family

ID=34306220

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04787052A Withdrawn EP1673501A2 (fr) 2003-09-30 2004-09-29 Cuve en plastique pour lave-linge ou seche-linge

Country Status (3)

Country Link
EP (1) EP1673501A2 (fr)
DE (1) DE10345848A1 (fr)
WO (1) WO2005033400A2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005045178B3 (de) 2005-09-21 2006-10-12 Miele & Cie. Kg Kunststofflaugenbehälter für eine Waschmaschine und Verfahren zur Herstellung eines Kunststofflaugenbehälters
DE102005054968B3 (de) * 2005-11-16 2006-11-02 Miele & Cie. Kg Kunststofflaugenbehälter für eine Wäschebehandlungsmaschine und Wäschebehandlungsmaschine
DE112006003892B4 (de) * 2006-05-12 2019-02-07 Lg Electronics Inc. Waschmaschine mit einer Wanne und Wanne für eine Waschmaschine
CA2604671A1 (fr) * 2007-09-28 2009-03-28 Mabe Canada Inc. Support de joint de roulement de secheuse de linge
TR201604274A2 (tr) * 2016-04-04 2017-10-23 Arcelik As Mekani̇k dayanimi i̇yi̇leşti̇ri̇len kazana sahi̇p bi̇r çamaşir yikayici-kurutucu
CN110331557B (zh) * 2019-06-14 2022-09-16 重庆海尔滚筒洗衣机有限公司 一种洗衣机外筒底
DE102021205432A1 (de) 2021-05-28 2022-12-01 BSH Hausgeräte GmbH Haushaltsgerät zur Pflege von Wäschestücken mit spezifischem Lagersystem für eine Welle an einem Laugenbehälter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2493361A1 (fr) * 1980-11-05 1982-05-07 Amiens Const Elect Mec Machine a laver le linge a tambour horizontal monte sur deux paliers inseres dans des supports amovibles
IT1187618B (it) * 1985-10-11 1987-12-23 Zanussi Elettrodomestici Procedimento di fabbricazione di una vasca di lavaggio per macchina lavabiancheria e vasca di lavaggio cosi' ottenuta
IT231989Y1 (it) * 1993-12-23 1999-08-10 Zanussi Elettrodomestici Lavabiancheria con vasca di lavaggio perfezionata
IT245289Y1 (it) * 1998-01-20 2002-03-20 Electrolux Zanussi Elettrodome Vasca in plastica perfezionata per macchina lavabiancheriae simili
JPH11226985A (ja) * 1998-02-10 1999-08-24 Asahi Chem Ind Co Ltd ガラス繊維強化ポリアミド樹脂射出成形品

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005033400A3 *

Also Published As

Publication number Publication date
DE10345848A1 (de) 2005-04-14
WO2005033400A3 (fr) 2005-07-07
WO2005033400A2 (fr) 2005-04-14

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