EP3067457B1 - Waschmaschine mit direktantriebsmotor und verfahren zur herstellung davon - Google Patents

Waschmaschine mit direktantriebsmotor und verfahren zur herstellung davon Download PDF

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Publication number
EP3067457B1
EP3067457B1 EP15158899.3A EP15158899A EP3067457B1 EP 3067457 B1 EP3067457 B1 EP 3067457B1 EP 15158899 A EP15158899 A EP 15158899A EP 3067457 B1 EP3067457 B1 EP 3067457B1
Authority
EP
European Patent Office
Prior art keywords
tub
stator assembly
central
washing machine
plastic
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.)
Not-in-force
Application number
EP15158899.3A
Other languages
English (en)
French (fr)
Other versions
EP3067457A1 (de
Inventor
Dusan Heldak
Crescenzo Iannicelli
Peter Mihalka
Vladimir Olejar
Vaclav Petracek
Pavol Vasko
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.)
Whirlpool Corp
Original Assignee
Whirlpool Corp
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 Whirlpool Corp filed Critical Whirlpool Corp
Priority to EP15158899.3A priority Critical patent/EP3067457B1/de
Priority to US15/065,454 priority patent/US20160265151A1/en
Publication of EP3067457A1 publication Critical patent/EP3067457A1/de
Application granted granted Critical
Publication of EP3067457B1 publication Critical patent/EP3067457B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • D06F37/30—Driving arrangements 
    • 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
    • D06F37/30—Driving arrangements 
    • D06F37/304—Arrangements or adaptations of electric motors

Definitions

  • the present invention relates to a washing machine with a direct drive motor system comprising a tub, a drum rotatably mounted inside the tub, and a shaft connected to the drum for transmitting a driving torque of said direct drive motor system, this latter comprising a rotor assembly fastened to the shaft and a stator fastened to the tub.
  • EP 2626459 discloses a washing machine having a direct drive motor where the stator comprises fixing pins inserted into the rear wall of the tub. The use of pins and holes make the overall construction of the washing machine more complex.
  • EP 1580311 discloses a direct drive motor where the stator is centered by means of a cylindrical or conical protuberance which enters the bearing hole which is precisely machined in order to seat ball bearings. This known solution requires to reduce the axial distance of the ball bearings, with a direct impact on the rigidity of the drum shaft support, or to increase the axial dimension of the central portion of the bearing spider. Moreover the solution disclosed by EP 1580311 is not for washing machine having a plastic tub, since it is clearly fit for washing machines having a metal tub.
  • DE 10060940 discloses a washing machine which, similarly to EP 1580311 , uses a metal bearing spider which cooperates with an axial protrusion of the stator during reciprocal engagement. Metal surface of the bearing spider has to be precisely machined in order to properly centering the stator.
  • WO2008099551 discloses a motor unit for a washing machine with a body having a rotating shaft, a stator holding part to be mounted on the washing machine body, a stator and a rotor, wherein the stator and the rotor are assembled first, the rotor is then mounted on the rotating shaft and the stator is finally mounted on the stator holding part.
  • the plastic tub comprises a central axially protruding portion where a central opening of the stator is centered before its final fastening to the tub.
  • the centering of the stator on the tub is made by using only specific centering surfaces of the stator provided on the edge of the central opening used for its assembly to the protruding portion of the tub.
  • the plastic tub presents a rear wall in which a metal reinforcing element is embedded, i.e. co-injected. This increases the overall rigidity of the tub.
  • a metal reinforcing element forms also the central metal hub for mounting the bearings.
  • a direct drive washing machine comprises a plastic tub 10 whose rear wall 10a presents a reinforcing star-shaped metal element 12 which forms also a central hub 12a for mounting ball bearings 14.
  • Such bearings 14 are used supporting a shaft 16 supporting a drum 18.
  • the rear wall 10a of the plastic tub 10 presents an axial rear protrusion 20 having a first portion 20a slightly tapered and a second portion 20b which is cylindrical and whose diameter corresponds exactly to the diameter of a circumference defined by three centering curved surfaces 22 formed on an edge 22a of a central hole of a stator 24.
  • cup-shaped rotor 26 is mounted on one end 16a of the shaft 16 opposite the drum 18 .
  • the rear wall 10a of the tub presents, on its axial protrusion 20 a radial extension 28 ( figure 3 ) which corresponds to a radial seat 30 of the stator 24.
  • first step is to insert the stator 24 on the axial protrusion 20 of the tub, so that centering surfaces 22 slide first on the tapered portion 20a for a pre-centering operation and then it slides on a cylindrical smooth surface 21 of a portion 20b for a final centering operation, such movement ending when the stator 24 abuts the rear wall 10a of the tub 10. Then the stator 24, perfectly centered on the tub 10, is fixed in a known way by means of screws 32.

Landscapes

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

Claims (9)

  1. Waschmaschine mit einem Direktantriebsmotorsystem, umfassend eine Kunststoffwanne (10, 10a) mit einer Rückwand (10a), umfassend ein verstärkendes sternförmiges Metallelement (12), eine Trommel (18), die drehbar innerhalb der Wanne (10, 10a) montiert ist, und eine Welle (16), die mit der Trommel (18) zur Übertragung eines Antriebsmoments eines Direktantriebsmotors verbunden ist, wobei das sternförmige Metallelement (12) eine zentrale Nabe (12a) bildet, die zum Anbringen von Lagern (14) für die Welle (16) konfiguriert ist, wobei der Motor eine Rotoranordnung (26) umfasst, die an der Welle (16) befestigt ist, und eine Statoranordnung (24), die an der Nabe (10, 10a) befestigt ist, dadurch gekennzeichnet, dass die Kunststoffwanne (10) einen zentralen axialen hinteren vorstehenden Abschnitt (20) umfasst, der durch eine äußere Kunststoffschalung gebildet wird, die auf mindestens die zentrale Nabe (12a) des verstärkenden sternförmigen Metallelements (12) co-eingespritzt wird, wobei der zentrale axiale hintere vorstehende Abschnitt (20) zum Zentrieren einer zentralen Öffnung der Statoranordnung (24) mit der Wanne durch axiales Verschieben der Statoranordnung (24) an dem zentralen axialen hinteren Abschnitt (20) vor Befestigen der Statoranordnung (24) an der Wanne (10, 10a) konfiguriert ist.
  2. Waschmaschine nach Anspruch 1, wobei der zentrale vorstehende Abschnitt (20) der Wanne (10, 10a) einen sich verjüngenden Teil (20a) zum Vorzentrieren der Statoranordnung (24) und einen zylindrischen Abschnitt (20b) zum Zentrieren der Statoranordnung (24) umfasst.
  3. Waschmaschine nach Anspruch 1 oder 2, wobei in der Metallnabe (12a) Kugellager (14) montiert sind.
  4. Waschmaschine nach einem der vorstehenden Ansprüche, wobei die Statoranordnung (24) an der Wanne (10, 10a) mittels Schrauben (32) parallel zur Welle (16) befestigt ist.
  5. Waschmaschine nach Anspruch 4, wobei die Schrauben (32) an der Metallnabe (12a) befestigt sind.
  6. Waschmaschine nach einem der vorstehenden Ansprüche, wobei der zentrale vorstehende Abschnitt (20) mindestens eine radiale Verlängerung (28) aufweist, die zum Zusammenwirken mit einem entsprechenden Sitz (30) konfiguriert ist und auf der Statoranordnung (24) zum Gewährleisten einer vorbestimmten Winkelposition der Statoranordnung (24) in Bezug auf die Wanne (10, 10a) erhalten wird.
  7. Waschmaschine nach einem der vorstehenden Ansprüche, wobei die zentrale Öffnung der Statoranordnung (24) eine Mehrzahl von Zentrierflächen (22) aufweist, die zum Zusammenwirken mit einer äußeren zylindrischen Fläche (21) des zentralen vorstehenden Abschnitts (20) der Wanne (10, 10a) ausgebildet ist.
  8. Verfahren zur Herstellung einer Waschmaschine mit einem Direktantriebsmotorsystem, umfassend eine Kunststoffwanne (10, 10a) mit einer Rückwand, die ein verstärkendes sternförmiges Metallelement (12), eine Trommel (18), die drehbar in der Wanne (10, 10a) montiert ist, und eine Welle (16) umfasst, die mit der Trommel (18) zum Übertragen einer Antriebskraft eines Direktantriebsmotors verbunden ist, wobei das sternförmige Metallelement (12) eine zentrale Nabe (12a) bildet, die zum Montieren von Lagern für die Welle konfiguriert ist und wobei der Motor eine Rotoranordnung (26) umfasst, die an der Welle (16) befestigt ist, und eine Statoranordnung (24), die an der Wanne (10, 10a) befestigt ist, dadurch gekennzeichnet, dass das Verfahren die folgenden Schritte umfasst:
    • gleichzeitiges Einspritzen der Kunststoffwanne (10, 10a) auf mindestens die zentrale Nabe (12a) des sternförmigen Metallelements (12), so dass ein zentral vorstehender Kunststoffabschnitt (20) als Kunststoffschicht (A) auf der zentralen Nabe (12a) gebildet wird; und
    • axiales Verschieben der Statoranordnung (24) auf der Kunststoffschicht (A), um die Statoranordnung (24) auf der Wanne (10, 10a) zu zentrieren.
  9. Verfahren nach Anspruch 8, wobei der Schritt des Erzeugens eines zentralen vorstehenden Kunststoffabschnitts (20) durch Einspritzen von Kunststoffmaterial nahe dem einen Ende der Nabe (12a) ausgeführt wird.
EP15158899.3A 2015-03-12 2015-03-12 Waschmaschine mit direktantriebsmotor und verfahren zur herstellung davon Not-in-force EP3067457B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15158899.3A EP3067457B1 (de) 2015-03-12 2015-03-12 Waschmaschine mit direktantriebsmotor und verfahren zur herstellung davon
US15/065,454 US20160265151A1 (en) 2015-03-12 2016-03-09 Washing machine with direct drive motor and method for its manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15158899.3A EP3067457B1 (de) 2015-03-12 2015-03-12 Waschmaschine mit direktantriebsmotor und verfahren zur herstellung davon

Publications (2)

Publication Number Publication Date
EP3067457A1 EP3067457A1 (de) 2016-09-14
EP3067457B1 true EP3067457B1 (de) 2018-05-30

Family

ID=52669521

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15158899.3A Not-in-force EP3067457B1 (de) 2015-03-12 2015-03-12 Waschmaschine mit direktantriebsmotor und verfahren zur herstellung davon

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US (1) US20160265151A1 (de)
EP (1) EP3067457B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10975513B2 (en) * 2017-03-23 2021-04-13 Midea Group Co., Ltd. Tub with bearing housing insert for a laundry washing machine
US10487435B2 (en) 2017-03-23 2019-11-26 Midea Group Co., Ltd. Tub for a laundry washing machine
CN108797005B (zh) * 2017-05-02 2022-02-18 青岛海尔洗涤电器有限公司 一种使用直驱电机的滚筒洗衣机
EP3656909B1 (de) * 2018-11-22 2023-07-19 HAIER Germany GmbH Waschmaschine
CN110144703B (zh) * 2019-06-27 2021-02-12 朱幕松 低噪音滚筒式洗衣机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10060940A1 (de) 2000-12-07 2002-06-13 Bsh Bosch Siemens Hausgeraete Motor und Verfahren zur Montage
DE102004049549A1 (de) 2004-03-24 2005-10-13 Diehl Ako Stiftung & Co. Kg Motor als Direktantrieb und Verfahren zur Montage des Motors
KR100651849B1 (ko) * 2005-02-01 2006-12-01 엘지전자 주식회사 세탁기
JP4044602B1 (ja) * 2007-02-14 2008-02-06 松下電器産業株式会社 洗濯機のモータの組み立て方法と洗濯機のモータ
KR20130091019A (ko) 2012-02-07 2013-08-16 삼성전자주식회사 모터와 이를 가지는 세탁기

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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EP3067457A1 (de) 2016-09-14
US20160265151A1 (en) 2016-09-15

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