EP3339491A1 - Trommelbaugruppe für eine waschmaschine - Google Patents

Trommelbaugruppe für eine waschmaschine Download PDF

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Publication number
EP3339491A1
EP3339491A1 EP15901664.1A EP15901664A EP3339491A1 EP 3339491 A1 EP3339491 A1 EP 3339491A1 EP 15901664 A EP15901664 A EP 15901664A EP 3339491 A1 EP3339491 A1 EP 3339491A1
Authority
EP
European Patent Office
Prior art keywords
assembly
arm
support
assembly according
shaft
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Withdrawn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
EP15901664.1A
Other languages
English (en)
French (fr)
Other versions
EP3339491A4 (de
Inventor
Alberto GARCÍA COLLADO
David Ángel MARTÍNEZ LLANOS
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.)
TEKNIA BILBAO XXI, SOCIEDAD LIMITADA
Original Assignee
Teknia Montmelo SL
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 Teknia Montmelo SL filed Critical Teknia Montmelo SL
Publication of EP3339491A1 publication Critical patent/EP3339491A1/de
Publication of EP3339491A4 publication Critical patent/EP3339491A4/de
Withdrawn legal-status Critical Current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
    • D06F37/02—Rotary receptacles, e.g. drums
    • 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
    • D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis
    • 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
    • D06F37/262—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements made of plastic material, e.g. by injection moulding

Definitions

  • the present invention falls within the field of washing machines, in particular the field of washing machine components, such as the drum.
  • Said invention is a drum assembly for a washing machine that comprises a drum, a support assembly for the same and fastening means between both the drum and the support assembly.
  • a star-shaped support in an aluminium alloy with a machined shaft secured to the same is used for transmitting the rotational movement of the motor to the stainless steel drum, said securing achieved with the same aluminium alloy of the support which is overmoulded on the shaft.
  • This support assembly is subjected to alternating mechanical forces due to the movement of the drum, in addition to high temperature (up to 100°C) and to chemical attacks caused by detergents and other products used in washing clothes.
  • the combination of mechanical forces and chemical attacks provokes the degradation of the support assembly during the lifespan of the washing machine, thus leading to mechanical failure and to the subsequent repair or replacement thereof.
  • washing machines other known components of washing machines other than the previously mentioned support assembly, such as tubs with a metal core and overmoulded plastic, such as in patent EP2392718 .
  • the tub does not receive mechanical forces combined with chemical attacks like the support assembly of the drum, and therefore its configuration is simple.
  • the present invention solves the drawbacks in the state of the art and covers the need for washing machine components that resist mechanical forces and chemical attacks.
  • the object of the invention is a drum assembly for a washing machine with a drum and a support assembly for the same that is an alternative to an aluminium alloy support and is able to withstand the mechanical forces and chemical attacks to which washing machine drums are subjected.
  • the technical problem to be solved is to configure the previously mentioned components to achieve the object of the invention.
  • One advantage of the invention in relation to claim 1 is that it thoroughly complies with the object of the invention since the arrangement and configuration of the metallic core together with the plastic covering has a greater resistant module than the same assembly in aluminium alloy, and therefore it better withstands the alternating forces and experiences a lesser degree of deformation.
  • the encapsulation prevents any contact between the metallic core and the detergents in chlorinated water at high temperatures, and therefore prevents corrosion, unlike the aluminium alloy in the state of the art.
  • Another advantage in relation to claim 2 is that it properly resists torsional stress.
  • Another advantage in relation to claim 4 is that the material is removed from areas where it is unnecessary, which reduces the cost of the assembly by using less plastic and also makes the assembly lighter.
  • Another advantage in relation to claim 5 is that it allows a metallic core of a single piece to be prepared for two contiguous arms, and therefore the manufacturing is more simple, normally by stamping a metal sheet.
  • Another advantage in accordance with claim 7 is that it resists the torsional stresses on the shaft for any condition of the drum or any load in the drum.
  • Another advantage in relation to claim 8 is that it facilitates the connection of the shaft to the metallic core.
  • Another advantage in relation to claim 9 is that, in addition to the fact that the thickness is suitable for resisting the previously mentioned mechanical forces, it provides enough weight to the assembly in order to minimise the use of counterweights, in comparison with aluminium alloy in the state of the art which has a greater need of using counterweights.
  • Another advantage in relation to claim 10 is that plastics that are already used in other components of washing machines, and which can include grades that are resistant to attacks by detergents and chlorinated water at high temperatures, are used in the covering.
  • Another advantage in relation to claim 11 is that the fibres are already used in other components of the washing machines and provide great rigidity to the assembly.
  • Figure 1 shows a drum assembly for a washing machine as it is known in the state of the art that comprises:
  • the arms (2.1.1) of the support (2.1) are fastened to an edge of the cylindrical wall (1.1) that projects from the rear wall (1.2) of the drum (1), however, with simple and evident changes, it may be envisaged that the fastening of said arms (2.1.1) be done to the rear wall (1.2) itself.
  • Figures 1 , 3A and 4 show a preferred embodiment of the star-shaped support (2.1) with 3 arms (2.1.1), however, supports (2.1) with 6 or 8 arms (2.1.1) could be used, such as the ones shown in figures 3B and 3C , respectively.
  • Figures 4 to 8 show that the star-shaped support (2.1) further comprises a metallic core (2.1.2) encapsulated by an overmoulded plastic covering (2.1.3), said metallic core (2.1.2) comprising two plates (2.1.4) for each arm (2.1.1) disposed transversely with respect to the main plane of the support assembly (2), in other words, the plates (2.1.4) extend radially in the star-shaped support (2.1), with the larger sides of the transverse cross section thereof disposed parallel to the shaft (2.2).
  • Each plate (2.1.4) in each arm (2.1.1) has a central part (2.1.5) that clasps to a portion of the shaft (2.2), followed by a first section (2.1.6) that extends in each arm (2.1.1) to a second section (2.1.7) as a continuation of the first, the shaft (2.2) remaining secured by the plastic covering (2.1.3).
  • the star-shaped support (2.1) forms a diameter between a minimum of 300 mm to a maximum of 600 mm. This makes it so that, along with the fastening means (3) used, they are compatible with those used in an already existing drum assembly, for example, making threaded holes coincide, and further makes it possible to replace an existing support assembly (2) with a star-shaped support (2.1) in aluminium alloy by one in accordance with the invention.
  • the second sections (2.1.7) of the plates (2.1.4) are more separated from each other than the first sections (2.1.6). Specifically, it is verified that the separation (s1) between the first sections (2.1.6) of the plates (2.1.4) can be between 10 mm and 40 mm, and the separation (s2) between the second sections (2.1.7) of the plates (2.1.4) can be between 40 mm and 200 mm.
  • the transition between the first section (2.1.6) and the second section (2.1.7) can be made by means of a smooth transition, in other words, in a curved shape, preventing vertices from forming, in order to transition from one separation to another, although any other configuration is also possible.
  • each arm (2.1.1) corresponding to the first section (2.1.6) of the plates (2.1.4) is in a U-shape, the plates (2.1.4) being the wings, with a plastic covering (2.1.3) and the central span (2.1.8) of plastic covering (2.1.3).
  • Figure 8 shows a longitudinal cross section of an arm (2.1.1), the profile of which is inclined, able to have a height from the highest part to the lowest part between 20 mm and 100 mm, although the profile could also be straight.
  • the small heights are favourable for support assemblies (2) that are more compact but with less moment of inertia, which are more favourable for drums with smaller loads of clothes, while the greater heights are favourable for larger loads of clothes.
  • each arm (2.1.1) has a hollow (2.1.9) in at least one portion of the plastic covering (2.1.3) in correspondence with the second section (2.1.7) of the plates (2.1.4).
  • shaft (2.2) is further secured to the central part (2.1.5) of each plate (2.1.4) of each arm (2.1.1) by welding (4), able to be a cord, as shown, a point or even a button by filling a hole made on the central part (2.1.5), not shown in the figures.
  • the shaft (2.2) is knurled (2.2.1) with teeth of heights between 2 mm and 4 mm.
  • the shaft (2.2) is broached (2.2.2) on the portion of the central part (2.1.5), meaning, in the areas where said central parts (2.1.5) of the plates (2.1.4) are secured to the shaft (2.2).
  • Figure 10 illustrates the shaft (2.2) with two broached areas (2.2.2), however, said shaft (2.2) could comprise up to 8 broached areas (2.2.2), for example, depending on the number of arms (2.1.1) that the star-shaped support (2.1) has.
  • the plates (2.1.4) have a thickness between 1 mm and 5 mm.
  • holes could be made in the same, not shown in the figures.
  • the plastic covering (2.1.3) is reinforced with fibres, the plastic being a plastic chosen from PP (polypropylene), PPS (polyphenylene sulfide), PSU (polysulfone) and PET (polyethylene terephthalate).
  • PP polypropylene
  • PPS polyphenylene sulfide
  • PSU polysulfone
  • PET polyethylene terephthalate
  • the fibres are a material chosen from glass, calcium and carbon.
  • the fibres can be short, medium or long, the length preferably being between 0.1 mm and 3 mm for glass and between 1 ⁇ m and 20 ⁇ m for calcium.
  • the fastening means (3) comprise at least a threaded hole (3.1) in the plastic covering (2.1.3) of each arm (2.1.1) and a screw (3.2) with a self-locking thread.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
EP15901664.1A 2015-08-19 2015-08-19 Trommelbaugruppe für eine waschmaschine Withdrawn EP3339491A4 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2015/070627 WO2017029416A1 (es) 2015-08-19 2015-08-19 Conjunto tambor para lavadora

Publications (2)

Publication Number Publication Date
EP3339491A1 true EP3339491A1 (de) 2018-06-27
EP3339491A4 EP3339491A4 (de) 2018-12-05

Family

ID=58050662

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15901664.1A Withdrawn EP3339491A4 (de) 2015-08-19 2015-08-19 Trommelbaugruppe für eine waschmaschine

Country Status (2)

Country Link
EP (1) EP3339491A4 (de)
WO (1) WO2017029416A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11970811B2 (en) 2021-06-08 2024-04-30 Whirlpool Corporation Overmolded basket base assembly

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57145694A (en) * 1981-03-05 1982-09-08 Tokyo Shibaura Electric Co Washing machine in combination with dehydration
AU3472397A (en) * 1996-07-02 1998-01-21 Domel Elektromotorji In Gospodinjski Aparati, D.O.O. Electronically commutated motor for direct drive of washing machine drum
AU753411B2 (en) * 1999-10-19 2002-10-17 Lg Electronics Inc. Structure of driving unit in drum type washing machine
US7997103B2 (en) * 2002-12-10 2011-08-16 Lg Electronics Inc. Tub having structurally strengthened rear wall and washing machine with the same therein
DE112006000010T5 (de) * 2005-02-01 2007-05-03 Lg Electronics Inc. Waschmaschine mit Doppelrotormotor
DE102005046010B3 (de) * 2005-09-26 2006-10-12 Miele & Cie. Kg Kunststofflaugenbehälter für eine Waschmaschine und Verfahren zur Herstellung eines Kuststofflaugenbehälters
KR101191194B1 (ko) * 2006-05-01 2012-10-15 엘지전자 주식회사 드럼세탁기의 스파이더 구조
KR100756996B1 (ko) * 2006-06-29 2007-09-07 주식회사 대창 드럼 세탁기의 드럼과 스파이더 결합 구조
EP2270273B1 (de) * 2009-06-29 2016-01-27 Electrolux Home Products Corporation N.V. Waschmaschine
KR101194239B1 (ko) * 2010-11-30 2012-10-29 우성알앤디 주식회사 센서 스위치

Also Published As

Publication number Publication date
WO2017029416A1 (es) 2017-02-23
EP3339491A4 (de) 2018-12-05

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