WO2012143276A2 - Ensemble de soulèvement de tambour destiné à un lave-linge - Google Patents

Ensemble de soulèvement de tambour destiné à un lave-linge Download PDF

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Publication number
WO2012143276A2
WO2012143276A2 PCT/EP2012/056591 EP2012056591W WO2012143276A2 WO 2012143276 A2 WO2012143276 A2 WO 2012143276A2 EP 2012056591 W EP2012056591 W EP 2012056591W WO 2012143276 A2 WO2012143276 A2 WO 2012143276A2
Authority
WO
WIPO (PCT)
Prior art keywords
band
lifter
drum
foot
slots
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.)
Ceased
Application number
PCT/EP2012/056591
Other languages
English (en)
Other versions
WO2012143276A3 (fr
Inventor
Giovanni Porcarelli
Giovanni Paoloni
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.)
QS GROUP SpA
Original Assignee
QS GROUP 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 QS GROUP SpA filed Critical QS GROUP SpA
Publication of WO2012143276A2 publication Critical patent/WO2012143276A2/fr
Publication of WO2012143276A3 publication Critical patent/WO2012143276A3/fr
Anticipated expiration legal-status Critical
Ceased 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
    • D06F37/02—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
    • D06F37/02—Rotary receptacles, e.g. drums
    • D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis
    • D06F37/06—Ribs, lifters, or rubbing means forming part of the receptacle
    • 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
    • D06F37/12—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a vertical axis
    • D06F37/14—Ribs or rubbing means forming part of the receptacle

Definitions

  • a drum-lifters assembly for washing machine A drum-lifters assembly for washing machine.
  • the present patent application for industrial invention relates to a drum-lifters assembly for a washing machine.
  • a drum of a washing machine is illustrated, generally indicated with numeral (1 ).
  • the drum (1 ) comprises a front flange (A), a back flange (B) and a cylindrical flange (2) closed as shell.
  • the front flange (A), the back flange (B) and the cylindrical flange (2) are mechanically joined in order to create a shell.
  • the shell of the drum (1 ) is adapted to contain the laundry during the washing process.
  • elements, defined as lifters (4) are contained inside the drum (1 ).
  • the purpose of lifters (4) is to drag the laundry during the rotation of the drum (1 ).
  • Said lifters (4) have an elongated shape and are disposed inside the drum (1 ), generally in number of three, mutually spaced by 120° and parallel to the axis of the drum. Therefore, hereinafter the axial or longitudinal direction indicates the direction of the length of the lifter, whereas the transversal direction indicates the direction of the width of the lifter.
  • Said lifters (4) are obtained from molding plastic material and have a rounded base that copies the internal surface of the band (2), wheras the body of the lifters (4) takes different shapes, in order to drag and mix the laundry better.
  • connection between the plastic lifters (4) and the steel band (2) of the drum is made by means of a series of feet (40) protruding relative to the base of the lifter, which are engaged in suitable slots (20) obtained on the steel wall of the band (2).
  • Figs. 3 - 1 1 illustrate a fixing system of said feet of the lifter according to the prior art.
  • the foot (240) of the lifter comprises an enlarged head (241 ) and a stem (242).
  • a groove (243) is obtained, facing towards the outside of the lifter.
  • the slots (220) obtained on the cylindrical surface of the band (2) have a wide portion (221 ) adapted to receive the head (241 ) of the foot and a narrow portion (222) adapted to tighten the stem (242) of the foot in correspondence of the groove (243).
  • the assembly between lifter (4) and band (2) is made by means of a first radial movement of the lifter and a second axial movement of the lifter.
  • the stems (41 ) of the feet are inserted in the narrow portion (222) of the slot, thus inserting the edge of the narrow portion of the slot into the groove (243) of the foot.
  • the lifter is firmly locked in radial direction, because the head (241 ) of the feet, being wider, provides locking of the foot in the narrow portion (222) of the slot.
  • a cutoff tab (203) is obtained in the band (2) to avoid the backward travel of the lifter (in axial direction). As shown in Fig. 1 1 , the tab (203) is folded against a support obtained on the lifter (4).
  • Said fixing system of the prior art requires a first cutoff portion (wide portion (221 ) of the slot) on the band (2) in order to receive the head of the foot and a contiguous second cutoff portion (narrow portion (222) of the slot) in order to receive the stem of the foot. It appears evident that the cutoff portion on the band is large, because in addition to the functional portion (222) necessary to fix the foot, said system also requires cutting off an additional portion (221 ) exclusively necessary to insert the head of the foot.
  • DE 33 17 201 discloses a tub of a washing machine comprising a cylindrical band with elongated body and a base adapted to be disposed on the internal surface of the band.
  • Said band comprises slots and drawn portions provided with openings.
  • Lifters comprise feet adapted to engage into the slots and engagement means adapted to engage into the openings of the drawn portions.
  • the purpose of the present invention is to eliminate the drawbacks of the prior art, in the attempt to minimize the concentration of stress on the drum, reducing the cutoff portions of the band of the drum with respect to the prior art by means of a different geometry of the area where lifters are joined with the band of the drum.
  • the invention consists in creating a difference of level or "step" on the band of the drum between the fixing surface and the portion adapted to receive the head of the foot, no longer having to cut off the band for the portion adapted to receive the head of the foot.
  • the lower level can be obtained by drawing the fixing areas towards the inside of the drum, whereas the higher level corresponds to the external diameter of the band.
  • such a step can be also created with an inverse process, leaving the fixing areas on the band of the drum and drawing towards the outside the areas adapted to receive the head of the foot.
  • the cutting off of the slot is only limited to the fixing area, no longer having to cut off the area adapted to receive the head of the foot, which is housed in the difference of level that has been suitably created. It must be considered that, compared to the prior art, the invention allows for a considerable reduction of cut off portions, equal to approximately 50-60%.
  • the lifter is brought against the internal surface of the band with a radial movement and then is longitudinally translated in such a way that the feet can engage in the slots.
  • the lifter is first compressed in transversal direction and then inserted in radial direction at the level of the slots and finally released.
  • the feet are engaged in the slots.
  • the band is not provided with external projections. In such a way, the distance between the drum and the tub can be reduced, thus advantageously increasing the washing volume of the washing machine.
  • Fig. 1 is a perspective view of a drum-lifters assembly in assembled condition
  • Fig. 2 is an exploded perspective view of the drum-lifter assembly of
  • Fig. 3 is a plan view of a portion of the band of a drum according to the prior art
  • Fig. 4 is longitudinal sectional view of a portion of band and lifter according to the prior art
  • Fig. 4A is an enlarged view of the detail enclosed in circle A of Fig. 4.
  • Fig. 5 is cross-sectional view of a portion of band and lifter of Fig. 4.
  • Fig. 5B is an enlarged view of the detail enclosed in circle B of Fig. 5.
  • Figs. 6 and 7 respectively correspond to Figs. 4 and 5 further to a radial movement of the lifter
  • Figs. 8 and 9 respectively correspond to Figs. 6 and 7 further to a longitudinal movement of the lifter
  • Figs. 10 and 1 1 respectively correspond to Figs. 8 and 9 further to folding a fixing wing obtained on the band;
  • Fig. 12 is a plan view of a portion of the band of a drum according to a first embodiment of the invention.
  • Fig. 13 is a longitudinal sectional view of a portion of band and lifter according to a first embodiment of the invention.
  • Fig. 13A is an enlarged view of the detail enclosed in circle A of Fig.
  • Fig. 14 is a cross-sectional view of the portion of band and lifter of Fig.
  • Fig. 14B is an enlarged view of the detail enclosed in circle B of Fig.
  • Figs. 15 and 16 respectively correspond to Figs. 13 and 14 further to a radial movement of the lifter
  • Figs. 17 and 18 respectively correspond to Figs. 15 and 16 further to a longitudinal movement of the lifter
  • Figs. 19 and 20 respectively correspond to Figs. 17 and 18 further to folding a fixing wing obtained on the band;
  • Fig. 21 is a plan view of a portion of the band of a drum according to a second embodiment of the invention.
  • Fig. 22 is a longitudinal sectional view of a portion of band and lifter according to the second embodiment of the invention.
  • Fig. 22A is an enlarged view of the detail enclosed in circle A of Fig.
  • Fig. 23 is a cross-sectional view of the portion of band and lifter of Fig.
  • Fig. 23B is an enlarged view of the detail enclosed in circle B of Fig.
  • Figs. 24 and 25 respectively correspond to Figs. 22 and 23 further to a radial movement of the lifter and a compression of the feet of the lifter;
  • Figs. 26 and 27 respectively correspond to Figs. 24 and 25 further to spring back to the original position of the feet of the lifter;
  • Figs. 28 and 29 respectively correspond to Figs. 26 and 27 further to folding a fixing wing obtained on the band.
  • FIGs. 12 to 20 a first embodiment of the invention is disclosed, wherein elements that are identical or correspond to the ones already described are indicated with the same numerals, omitting their detailed description.
  • the lifter (4) is provided with feet (40).
  • Each foot (40) comprises an enlarged head (41 ) and a stem (42) orthogonally protruding from the base of the lifter.
  • the head (41 ) forms a surface in undercut (43) with the stem, facing towards the outside of the lifter.
  • the feet are concealed inside the lifter, being covered by the sides (44) of the lifter.
  • the sides (44) have a stop surface (45) adapted to stop against the band of the drum.
  • a plurality of slots (20) with basically T-shaped profile is obtained in the band (2) of the drum.
  • Each slot (20) is partially surrounded by a U-shaped drawn portion (21 ), in such a way to leave an opening (23) to access the slot (20), facing the lifter in longitudinal direction.
  • the drawn portion (21 ) protrudes towards the inside of the drum and ends with a flat portion (22) protruding towards the inside of the drum, relative to the cylindrical surface of the band (2).
  • the T-shaped slot (20) is obtained in the flat portion (22), in communication with the opening (23) of the drawn portion (21 ).
  • the lifter (4) is moved radially (in the direction of arrow F1 ) towards the band of the drum, until the stop surface (45) of the sides of the lifter stops against the internal surface of the band (2).
  • the head (41 ) of the foot is stopped against the internal surface of the band (2), in the proximity of the opening (23) of the drawn portion (21 ) surrounding the slot (20).
  • the lifter (2) is translated in longitudinal direction (direction of arrow F2) in such a way that the head (41 ) of the foot of the lifter enters the slot (20), passing through the opening (23) of the drawn portion.
  • the surface in undercut (43) of the head stops against the flat external surface (22) of the drawn portion and the stop surface (45) of the wing stops against the internal surface of the band, thus holding the lifter and preventing it from moving in radial direction.
  • the lifter (4) is provided with at least one foot (40') with rounded angular portion (46) facing the lifter in longitudinal direction, disposed in the joint between head and stem of the foot.
  • the band (2) is provided with a slot (20') in correspondence of said foot (40').
  • the band (2) is provided with a folding edge (3) shaped as a semicircle, disposed in the opening (23) of the drawn portion (21 ) of the slot (20').
  • the edge (3) is folded towards the inside of the band, in such a way to stop against the rounded angular portion (46) of the foot, thus stopping the longitudinal sliding movement of the lifter.
  • FIGs. 21 to 29 a second embodiment of the invention is disclosed, wherein elements that are identical or correspond to the ones already described are indicated with the same numerals, omitting their detailed description.
  • the lifter (4) is provided with feet (140) basically similar to the feet (40) of the first embodiment. The only difference consists in the fact that each foot (140) is provided with angular rounding off (148) in the joint portion of the head (41 ), facing towards the inside of the lifter.
  • a plurality of slots (120) with basically rectangular profile and rounded corners is obtained in the band (2) of the drum
  • Each slot (120) is partially surrounded by a U-shaped drawn portion (121 ) in such a way to leave an opening (123) to access the slot (120), facing the lifter in longitudinal direction, towards the inside of the lifter.
  • the drawn portion (121 ) protrudes towards the inside of the drum and ends with a flat portion (122) protruding towards the inside of the drum, relative to the surface of the band (2).
  • the slot (120) is obtained in the flat portion (122), in communication with the opening (123) of the drawn portion (121 ).
  • the lifter 4 is precompressed in the direction of arrows (X), that is to say the feet (140) of the lifter are elastically folded in transversal diretion towards the inside of the lifter.
  • the precompressed lifter is moved radially (in the direction of arrow F1 ) towards the band of the drum, until the stop surface (45) of the wing (44) of the foot of the lifter is stopped against the internal surface of the band (2).
  • the head (41 ) of the foot is stopped against the internal surface of the band (2), in the proximity of the opening (123) of the drawn portion (121 ) surrounding the slot (120).
  • the lifter (2) is released (i.e. precompression is removed). Consequently, the feet (140) of the lifter are elastically bent outwards to return in their original position. So, the head (41 ) of the foot of the lifter enters the slot (120), passing through the opening (123) of the drawn portion.
  • the surface in undercut (43) of the head is stopped against the flat external surface (122) of the drawn portion and the stop surface (45) of the sides of the lifter is stopped against the internal surface of the band, thus holding the lifter and preventing it from moving in radial direction.
  • the band (2) is provided with a folding edge (103) shaped as a semicircle, disposed in the opening (123) of the drawn portion (121 ) of the slot (120').
  • the edge (1 03) is folded towards the inside of the drum, in such a way to stop against the rounded angular portion (146) of the foot. So, a possible compression of the feet towards the inside of the lifter is stopped, thus avoiding the accidental release of the lifter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Centrifugal Separators (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

L'invention concerne un tambour (1) destiné à un lave-linge et comprenant une bande métallique cylindrique (2) et une pluralité d'éléments de soulèvement (4) dotés d'un corps allongé et d'une base adaptée pour être disposée sur la surface interne de la bande, ladite bande (2) comprenant des fentes (20 ; 120) et lesdits éléments de soulèvement (4) comprenant des pieds (40 ; 140) adaptés pour être amenés en prise à l'intérieur desdites fentes (20 ; 120). Lesdites fentes (20 ; 120) sont obtenues sur une partie plate (22 ; 122) partiellement entourée par une partie tirée (21 ; 121) de la bande, d'une manière telle que ladite partie plate (22 ; 122) avec les fentes est située à un niveau différent de ladite bande (2) ; ladite partie tirée (21 ; 121) étant pourvue d'une ouverture (23 ; 123) en communication avec ladite fente afin d'insérer le pied (40 ; 140) de l'élément de soulèvement.
PCT/EP2012/056591 2011-04-19 2012-04-11 Ensemble de soulèvement de tambour destiné à un lave-linge Ceased WO2012143276A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000053A ITAN20110053A1 (it) 2011-04-19 2011-04-19 Gruppo cestello e trascinatori per macchina lavabiancheria.
ITAN2011A000053 2011-04-19

Publications (2)

Publication Number Publication Date
WO2012143276A2 true WO2012143276A2 (fr) 2012-10-26
WO2012143276A3 WO2012143276A3 (fr) 2013-08-29

Family

ID=44553887

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/056591 Ceased WO2012143276A2 (fr) 2011-04-19 2012-04-11 Ensemble de soulèvement de tambour destiné à un lave-linge

Country Status (2)

Country Link
IT (1) ITAN20110053A1 (fr)
WO (1) WO2012143276A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016107641A1 (fr) * 2014-12-30 2016-07-07 Arcelik Anonim Sirketi Tambour de lave-linge et disposition de fixation de palettes
WO2019129407A1 (fr) 2017-12-26 2019-07-04 Arcelik Anonim Sirketi Lave-linge/sèche-linge à déflecteur

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3317201A1 (de) 1983-05-11 1984-11-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Waschmaschinentrommel

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1144226B (de) * 1959-04-23 1963-02-28 Siemens Elektrogeraete Gmbh Waschmaschinentrommel
GB1161219A (en) * 1966-08-31 1969-08-13 Philips Electronic Associated Improvements in or relating to Domestic Washing Machines.
KR200358903Y1 (ko) * 2004-05-15 2004-08-12 엘지전자 주식회사 드럼 세탁기의 리프터 장착 구조
KR101367112B1 (ko) * 2007-06-07 2014-02-26 삼성전자주식회사 회전조 바디와 이를 갖춘 드럼세탁기
ES2332346B1 (es) * 2008-03-03 2011-02-02 Bsh Electrodomesticos España, S.A. Tambor de lavadora.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3317201A1 (de) 1983-05-11 1984-11-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Waschmaschinentrommel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016107641A1 (fr) * 2014-12-30 2016-07-07 Arcelik Anonim Sirketi Tambour de lave-linge et disposition de fixation de palettes
WO2019129407A1 (fr) 2017-12-26 2019-07-04 Arcelik Anonim Sirketi Lave-linge/sèche-linge à déflecteur

Also Published As

Publication number Publication date
WO2012143276A3 (fr) 2013-08-29
ITAN20110053A1 (it) 2012-10-20

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