US20080271499A1 - Household-Type Washing Machine with Compact Drive Motor - Google Patents

Household-Type Washing Machine with Compact Drive Motor Download PDF

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Publication number
US20080271499A1
US20080271499A1 US12/095,941 US9594106A US2008271499A1 US 20080271499 A1 US20080271499 A1 US 20080271499A1 US 9594106 A US9594106 A US 9594106A US 2008271499 A1 US2008271499 A1 US 2008271499A1
Authority
US
United States
Prior art keywords
drum
tub
drive shaft
rotary drive
stator
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.)
Abandoned
Application number
US12/095,941
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English (en)
Inventor
Daniele Favaro
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.)
Electrolux Home Products Corp NV
Original Assignee
Electrolux Home Products Corp NV
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 Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Assigned to ELECTROLUX HOME PRODUCTS CORPORATION N.V. reassignment ELECTROLUX HOME PRODUCTS CORPORATION N.V. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FAVARO, DANIELE
Publication of US20080271499A1 publication Critical patent/US20080271499A1/en
Abandoned 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
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • D06F37/206—Mounting of motor
    • 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
    • D06F37/267—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 present invention refers to an improved kind of both front-loading and top-loading clothes washing machine that is provided with a washing tub and a drive motor for rotatably driving a rotating drum housed within said washing tub, wherein said clothes washing machine is particularly compact in the depth dimension, i.e. in the direction from the front side to the rear side thereof 5 and wherein said drive motor is adapted to be easily replaced or repaired.
  • Clothes washing machines are generally known to have an inner drum, which is rotatably driven by means of the rotary drive shaft thereof that is caused to pass through a central aperture provided in the rear wall of the washing tub accommodating said drum, from which said shaft therefore protrudes.
  • This rotary drive shaft of the drum is shrink-fitted onto a pulley, or driven pulley, that is connected to the motor or drive pulley by means of an appropriate belt engaging both of them.
  • these synchronous motors are advantageously press-fitted or shrink-fitted directly on to said rotary drive shaft of the drum, i.e. exactly behind the rear side of the washing tub.
  • This configuration is generally referred to as “direct-drive” system in the art.
  • Direct drives of this kind actually bring about a number of advantages, especially of an economic and space-saving nature, since they do away with any need for an adequate space to be made available within the volume of the outer casing of a washing machine for the installation of a full-size motor and the pulley on the protruding rotary drive shaft of the drum.
  • synchronous motors used in such direct-drive configurations have a further drawback in that they cannot be repaired in the machine, i.e. in the assembled condition thereof. Should they be repaired or replaced for any reason whatsoever, these motors must therefore be fully removed from the machine and replaced in their entirety. It can be readily appreciated that this entails costs that could be at least partly avoided in the case that a motor failure occurs either only in the rotor or only in the stator.
  • FIG. 1 is a view of a washing tub provided with a synchronous motor of a kind according to the prior art
  • FIG. 2 is an exploded view of the washing tub, the drum, the hub supporting the drive shaft of the drum, the stator and the rotor of the motor according to a first embodiment of the present invention
  • FIG. 3 is a median cross-sectional view, through the axis of the drum, of the washing tub shown in FIG. 2 , with the various component parts in the assembled state thereof;
  • FIG. 4 is an exploded view of the washing tub, the drum, the hub supporting the drive shaft of the drum, the stator and the rotor of the motor according to a second embodiment of the present invention
  • FIG. 5 is a median cross-sectional view, through the axis of the drum, of the washing tub shown in FIG. 4 , with the various component parts in the assembled state thereof;
  • FIG. 6 is an exploded view of the washing tub, the drum, the hub supporting the drive shaft of the drum, the stator and the rotor of the motor according to a third embodiment of the present invention
  • FIG. 7 is an enlarged median cross-sectional view, through the axis of the drum, of the washing tub shown in FIG. 6 , with the various component parts in the assembled state thereof.
  • a clothes washing machine comprises a perforated rotating drum 1 for holding and handling the clothes to be washed, a loading door 2 ensuring access into said drum, a washing tub 3 mounted on—even in a suspended or oscillating manner—to the outer casing of said washing machine and accommodating said drum 1 , which is therefore housed rotatably inside said tub.
  • a synchronous motor comprising a stator 6 and a rotor 7 , arranged coaxially with the axis of rotation X of said drum and mounted externally to said tub on the rear side thereof, wherein said rotor 7 is shrink-fitted on to the rotary drive shaft 8 of said drum, a hub 9 being applied axially on to a central rear portion of said tub and accommodating said rotary drive shaft of the drum thereinside.
  • bearings 10 , 11 Provided to support said drive shaft 8 there are two bearings 10 , 11 arranged coaxially with said rotary drive shaft 8 and accommodated between said hub 9 and said rotary drive shaft.
  • the inner bearing 10 and the outer bearing 11 are situated at different distances “a” and “b”, respectively, from a common plane K passing through the drum inside the tub.
  • said motor is not positioned behind the rear wall of the tub, but rather within an appropriate cylindrical recess 13 provided in said rear wall 14 of the tub.
  • the tub itself can be manufactured using any technique and material, or combination thereof, as are generally known as such and used in the art. It will however be most readily appreciated that the present invention can best be applied to a moulded plastic tub, since such tub is by itself provided with a significant thickness on its rear side enabling said recessed accommodation 13 to be conveniently provided there.
  • FIGS. 2 and 3 these may be noticed to illustrate a first embodiment of the present invention, in which the stator 6 is arranged externally, i.e. adhering against the inner surface of said recessed accommodation, whereas the rotor 7 is arranged internally, i.e. inside the stator.
  • FIGS. 4 and 5 these may be noticed to illustrate a second embodiment of the present invention, in which the stator 6 is on the contrary arranged internally, whereas the rotor 7 is arranged externally, i.e. adhering against the inner surface of said recessed accommodation 13 .
  • the rotor and the stator are aligned with the outer bearing 11 , in the sense that their symmetry or median plane m, which lies orthogonal to the axis X, passes through the median plane of the outer bearing 11 or quite close thereto.
  • FIGS. 6 and 7 illustrate a further improved embodiment of the present invention.
  • This calls for the stator 6 to be mounted internally and the rotor 7 to be mounted externally, while the outer bearing 11 , instead of being mounted inside the hub 9 , is mounted directly inside the stator 6 , the hub 9 terminating before reaching, i.e. in advance of the position of said outer bearing 11 .
  • This embodiment has in fact the advantage of enabling the stator to be assembled in an integrated manner with the rear wall of the tub in an operation that is fully independent of the assembly of the rotor, which can therefore be mounted separately in a subsequent, again fully independent operation.
  • a further advantage of this particular embodiment lies in a clear improvement that can be achieved in terms of production standardization, since the possibility is given here for washing tubs provided with a same stator to be mass-produced, all of them duly provided with a same stator, to which different rotors may then be each time associated to cope with different functional or operating specifications which the various washing machine models are required to comply with.
  • the stator 6 is secured to the rear wall 14 of the tub with the help of fastening means that are largely known as such in the art, e.g. by means of bolts 17 extending axially through the stator to eventually engage the same rear wall 14 or, preferably, the annular rear wall 18 of the hub 9 , as this is allowed for by the very circumstance that said hub does not reach out to the axial position occupied by the related stator 6 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
US12/095,941 2005-12-06 2006-10-25 Household-Type Washing Machine with Compact Drive Motor Abandoned US20080271499A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP05111751.3 2005-12-06
EP05111751A EP1795641A1 (de) 2005-12-06 2005-12-06 Haushaltswaschmaschine mit kompaktem Antriebmotor
PCT/EP2006/010261 WO2007065501A1 (en) 2005-12-06 2006-10-25 Household -type clothes washing machine with compact drive motor

Publications (1)

Publication Number Publication Date
US20080271499A1 true US20080271499A1 (en) 2008-11-06

Family

ID=36809276

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/095,941 Abandoned US20080271499A1 (en) 2005-12-06 2006-10-25 Household-Type Washing Machine with Compact Drive Motor

Country Status (6)

Country Link
US (1) US20080271499A1 (de)
EP (2) EP1795641A1 (de)
KR (1) KR20080081299A (de)
CN (1) CN101341284A (de)
BR (1) BRPI0619614A2 (de)
WO (1) WO2007065501A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11035067B2 (en) * 2016-12-28 2021-06-15 Lg Electronics Inc. Laundry machine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPN20080032A1 (it) 2008-04-22 2009-10-23 Appliances Components Companies Spa "lavabiancheria domestica con vasca perfezionata".
DE102015212856A1 (de) * 2015-07-09 2017-01-12 Jungheinrich Aktiengesellschaft Verfahren zur Herstellung einer elektrischen Maschine mit flexiblem Rotor und Fahrzeug umfassend eine solche
DE102016225105A1 (de) * 2016-12-15 2018-06-21 BSH Hausgeräte GmbH Elektrischer Antriebsmotor sowie diesen enthaltendes Haushaltsgerät bzw. Motorbaukasten
CN113062079B (zh) * 2019-12-31 2023-02-03 广东美的白色家电技术创新中心有限公司 家用电器

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6131422A (en) * 1997-06-20 2000-10-17 Bsh Bosch Und Siemens Hausgeraete Gmbh Drive device for a washing machine
US20020059817A1 (en) * 1999-05-17 2002-05-23 Reinhard Heyder Drive apparatus for a washing machine
US6564594B1 (en) * 1999-03-10 2003-05-20 Kabushiki Kaisha Toshiba Drum type washing machine
US6626014B2 (en) * 1998-12-22 2003-09-30 Bsh Bosch Und Siemens Hausgeraete Gmbh Drive apparatus for a front-loading laundry treatment machine
US6681602B2 (en) * 1999-12-15 2004-01-27 Bsh Bosch Und Siemens Hausgeraete Gmbh Washing tub for a washing machine
US20040103698A1 (en) * 2002-11-28 2004-06-03 Lg Electronics Inc. Drum assembly of washing machine
US20040148981A1 (en) * 2002-09-26 2004-08-05 Kim Kwang Soo Tub assembly in drum-type washing machine
US20040163428A1 (en) * 2002-12-10 2004-08-26 Lg Electronics Inc. Drum type washing machine
US20060016228A1 (en) * 2004-07-20 2006-01-26 Lg Electronics Inc. Drum type washing machine and bearing housing structure thereof
US7397158B2 (en) * 2003-12-26 2008-07-08 Lg Electronics, Inc. Motor for washing machine
US7677063B2 (en) * 2004-11-04 2010-03-16 Lg Electronics Inc. Washing machine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3699855B2 (ja) * 1999-03-15 2005-09-28 株式会社東芝 ドラム式洗濯機
DE19937229A1 (de) * 1999-08-06 2001-02-08 Bsh Bosch Siemens Hausgeraete Antriebsvorrichtung für eine Waschmaschine

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6131422A (en) * 1997-06-20 2000-10-17 Bsh Bosch Und Siemens Hausgeraete Gmbh Drive device for a washing machine
US6626014B2 (en) * 1998-12-22 2003-09-30 Bsh Bosch Und Siemens Hausgeraete Gmbh Drive apparatus for a front-loading laundry treatment machine
US6564594B1 (en) * 1999-03-10 2003-05-20 Kabushiki Kaisha Toshiba Drum type washing machine
US20020059817A1 (en) * 1999-05-17 2002-05-23 Reinhard Heyder Drive apparatus for a washing machine
US6477869B2 (en) * 1999-05-17 2002-11-12 BSH Bosch und Siemens Hausgeräte GmbH Drive apparatus for a washing machine
US6681602B2 (en) * 1999-12-15 2004-01-27 Bsh Bosch Und Siemens Hausgeraete Gmbh Washing tub for a washing machine
US20040148981A1 (en) * 2002-09-26 2004-08-05 Kim Kwang Soo Tub assembly in drum-type washing machine
US20040103698A1 (en) * 2002-11-28 2004-06-03 Lg Electronics Inc. Drum assembly of washing machine
US20040163428A1 (en) * 2002-12-10 2004-08-26 Lg Electronics Inc. Drum type washing machine
US7397158B2 (en) * 2003-12-26 2008-07-08 Lg Electronics, Inc. Motor for washing machine
US20060016228A1 (en) * 2004-07-20 2006-01-26 Lg Electronics Inc. Drum type washing machine and bearing housing structure thereof
US7607326B2 (en) * 2004-07-20 2009-10-27 Lg Electronics Inc. Drum type washing machine and bearing housing structure thereof
US7677063B2 (en) * 2004-11-04 2010-03-16 Lg Electronics Inc. Washing machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11035067B2 (en) * 2016-12-28 2021-06-15 Lg Electronics Inc. Laundry machine

Also Published As

Publication number Publication date
EP1795641A1 (de) 2007-06-13
CN101341284A (zh) 2009-01-07
BRPI0619614A2 (pt) 2011-10-04
EP1960580A1 (de) 2008-08-27
KR20080081299A (ko) 2008-09-09
WO2007065501A1 (en) 2007-06-14

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ELECTROLUX HOME PRODUCTS CORPORATION N.V., BELGIUM

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FAVARO, DANIELE;REEL/FRAME:021224/0353

Effective date: 20080702

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION