US20090071199A1 - Washing machine - Google Patents

Washing machine Download PDF

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Publication number
US20090071199A1
US20090071199A1 US12/081,022 US8102208A US2009071199A1 US 20090071199 A1 US20090071199 A1 US 20090071199A1 US 8102208 A US8102208 A US 8102208A US 2009071199 A1 US2009071199 A1 US 2009071199A1
Authority
US
United States
Prior art keywords
tub
drum
washing machine
laundry
elastic members
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
US12/081,022
Other languages
English (en)
Inventor
Ig-geun Kwon
Hee-Tae Lim
Heung-gi Kim
Jung-tae Song
Suk-yun Moon
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.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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 LG Electronics Inc filed Critical LG Electronics Inc
Assigned to LG ELECTRONICS INC. reassignment LG ELECTRONICS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KWON, IG GEUN, LIM, HEE TAE, MOON, SUK-YUN, SONG, JUNG-TAE, KIM, HEUNG GI
Publication of US20090071199A1 publication Critical patent/US20090071199A1/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
    • D06F37/22—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a horizontal 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

Definitions

  • the present invention relates to a washing machine, and more particularly, to a drum type washing machine constructed in a structure in which the capacities of a tub and a drum are increased without the modification of a case forming the external appearance of the drum type washing machine.
  • a washing machine may be classified as a top loading type washing machine which receives laundry to be cleaned from the top of a case or as a drum type washing machine which receives laundry to be cleaned from the front of a case.
  • FIG. 1 is a side sectional view schematically illustrating the interior structure of a conventional drum type washing machine.
  • the conventional drum type washing machine includes a case 1 forming the external appearance of the drum type washing machine, a tub 4 mounted in the case 1 for receiving wash water, and a drum 6 rotatably mounted in the tub 4 for receiving laundry to be cleaned.
  • the case 1 forms the external appearance of the drum type washing machine.
  • the tub 4 is mounted in the case 1 .
  • the tub 4 includes a front tub 2 and a rear tub 3 .
  • the drum 6 is rotatably mounted in the tub 4 .
  • At the rear of the tub 4 is mounted a drive unit 9 for driving the drum 6 such that the drum 6 is rotated.
  • the tub 4 is supported by a damper 8 mounted at the lower side of the tub 4 and elastic members 7 mounted at the upper side of the tub 4 .
  • the damper 8 and the elastic members 7 serve to absorb vibration, generated from the tub 4 when the drum 6 is rotated by the drive unit 9 , to some extent.
  • the conventional drum type washing machine is constructed in a structure in which the elastic members 7 are positioned at opposite sides of the tub 4 such that the elastic members 7 coincide with the center of gravity, and therefore, the drum and the tub 4 are maintained level to some extent when laundry to be cleaned is not placed in the drum 6 ; however, the drum and the tub 5 tilt downward when laundry to be cleaned is put in the drum 6 , particularly when a maximum amount of the laundry to be cleaned in put in the drum 6 .
  • the laundry when laundry to be cleaned is put in the drum 6 , the laundry is generally gathered at the entrance side of the drum 6 . Even when the washing machine is operated, the laundry remains gathered at the entrance side of the drum 6 , with the result that the entrance sides of the drum 6 and the tub 4 tilt downward.
  • the entrance sides of the drum 6 and the tub 4 tilt downward by more than a predetermined angle the upper side of the tub 4 is vibrated by the rotation of the drum 6 , with the result that the tub 4 comes into contact with the inside of the case 1 , since the inner space of the case 1 is narrow. Consequently, the tub 4 may be damaged or even broken in the worst case.
  • the present invention is directed to a washing machine that substantially obviates one or more problems due to limitations and disadvantages of the related art.
  • An object of the present invention is to provide a drum type washing machine constructed in a structure in which the capacities of a tub and a drum are increased without the modification of a case forming the external appearance of the drum type washing machine.
  • a drum type washing machine includes a tub mounted in a case, a drum rotatably mounted in the tub, and a tilt reduction unit for reducing the downward tilt degree of the tub and the drum when laundry to be cleaned is received into the drum.
  • FIG. 1 is a side sectional view schematically illustrating the structure of a conventional drum type washing machine
  • FIG. 2 is a side view illustrating a drum type washing machine including a tilt reduction unit according to an embodiment of the present invention
  • FIG. 3 is an exploded view illustrating the separation between a tub and a drum of which the capacities are increased according to the present invention.
  • FIG. 4 is a graph illustrating the tilt degree of the tub and the drum at the entrance sides of the tub and the drum depending upon the change in weight of wash water and laundry to be cleaned in the conventional drum type washing machine and the drum type washing machine according to the present invention.
  • FIG. 2 is a side view illustrating a drum type washing machine including a tilt reduction unit according to an embodiment of the present invention.
  • the drum type washing machine includes a tilt reduction unit 30 for reducing the downward tilt degree of a tub 16 and a drum 20 at the entrance sides thereof when laundry to be cleaned and wash water are received into the drum 20 (see FIG. 3 ).
  • the tilt reduction unit 30 includes a plurality of elastic members 33 mounted at the tub 16 such that the elastic members 33 are arranged at predetermined intervals from the center of gravity of the tub 16 .
  • the tub 16 includes a front tub 12 and a rear tub 14 . Opposite ends of the elastic members 33 are fixed to fixing brackets 34 mounted at the outer circumference of the front tub 12 and in fixing holes 36 formed at a fixing plate 38 mounted at the inner top of a case (not shown), whereby the tub 16 is supported by the elastic members 33 .
  • the elastic members 33 constituting the tilt reduction unit 30 according to the present invention, are arranged at predetermined intervals from the center of gravity of the tub 16 to reduce the tilt of the tub 16 and the drum 20 , which will be described hereinafter in detail.
  • the elastic members 33 are mounted at the tub 16 such that the elastic members 33 are arranged at predetermined intervals toward the entrance side of the tub 16 from the center of gravity of the tub 16 .
  • the entrance side of the tub 16 which is supported by the elastic members 33 , tilts upward by a predetermined angle when laundry to be cleaned and wash water are not received into the tub 16 .
  • the elastic members 33 are mounted at the tub 16 such that the elastic members 33 are arranged at predetermined intervals toward the entrance side of the tub 16 from the center of gravity of the tub 16 , with the result that the entrance side of the tub 16 is raised, whereas the rear side of the tub 16 is lowered.
  • the elastic members 33 may be a pair of elastic members 33 mounted at opposite sides of the tub 16 .
  • the number of the elastic members 33 is not particularly restricted.
  • two or more elastic members 33 may be mounted at the tub 16 .
  • two elastic members may be mounted at one side of the tub 16
  • two elastic members may be mounted at the other side of the tub 16 .
  • the four elastic members are arranged such that the central points of the elastic members are located toward the entrance side of the tub 16 at predetermined intervals from the center of gravity. The following description will be given on the assumption that two elastic members 33 , constituting the tilt reduction unit 30 , are mounted at opposite sides of the upper part of the tub 16 , respectively.
  • the elastic members 33 are mounted at the tub 16 such that the elastic members 33 are arranged at predetermined intervals toward the entrance side of the tub 16 from the center of gravity of the tub 16 , the entrance sides of the drum 20 and the tub 16 tilt upward by a predetermined angle, when laundry to be cleaned and wash water are not received into the drum 20 .
  • the elastic members 33 are mounted at the tub 16 such that the entrance sides of the drum 20 and the tub 16 tilt upward by an angle of approximately 0.5 to 1 degree when laundry to be cleaned and wash water are not received into the drum 20 .
  • the entrance-side lower part of the tub 16 comes into contact with the inside of the case (not shown), with the result that the tub 16 may be deformed or damaged. Consequently, it is preferred to mount the elastic members 33 at the tub 16 such that the entrance sides of the drum 20 and the tub 16 do not tilt upward by an angle of more than 1 degree.
  • the entrance sides of the drum 20 and the tub 16 tilt downward due to the weights of the laundry and the wash water.
  • the downward tilt degree of the drum 20 and the tub 16 in which the entrance sides of the drum 20 and the tub 16 tilt downward is maximally reduced, although the laundry and the wash water are received into the drum 20 , since the elastic members 33 are mounted at the tub 16 such that the entrance sides of the drum 20 and the tub 16 tilt upward when the laundry and the wash water are not received into the drum 20 according to the present invention.
  • the elastic members 33 are mounted at the tub 16 such that the entrance sides of the drum 20 and the tub 16 tilt downward by an angle of approximately 0.5 degree to 1 degree even when a maximum amount of laundry to be cleaned and wash water are received into the drum 20 . If the entrance sides of the drum 20 and the tub 16 tilt downward by an angle of more than 1 degree, the entrance-side upper part of the tub 16 comes into contact with the inside of the case (not shown), with the result that the tub 16 may be deformed or damaged. Consequently, it is preferred to mount the elastic members 33 at the tub 16 such that the entrance sides of the drum 20 and the tub 16 do not tilt downward by an angle of more than 1 degree.
  • the elastic members 33 constituting the tilt reduction unit 30 , are mounted at the tub 16 such that the elastic members 33 are arranged at predetermined intervals toward the entrance side of the tub 16 from the center of gravity of the tub 16 , with the result that, when laundry to be cleaned and wash water are not received into the drum 20 , the entrance sides of the drum 20 and the tub 16 tilt upward by the predetermined angle, and, even when a maximum amount of laundry to be cleaned and wash water are received into the drum 20 , the entrance sides of the drum 20 and the tub 16 are prevented from tilting downward by more than the predetermined degree.
  • the downward tilt of the tub 16 is reduced according to the present invention, with the result that the distance between the tub 16 and the case is maintained, whereby it is possible to increase the capacities of the tub 16 and the drum 20 . That is, even when laundry to be cleaned and wash water are received into the drum 20 , the downward tilt degree of the drum 20 and the tub 16 in which the entrance sides of the drum 20 and the tub 16 tilt downward is reduced, with the result that the distance between the tub 16 and the case is maintained, whereby it is possible to increase the lengths of the drum 20 and the tub 16 without changing the size of the case, and therefore, it is possible to increase the capacities of the tub 16 and the drum 20 .
  • FIG. 3 is a view illustrating the front tub 12 of the tub 16 and the drum 20 , the capacities of which are increased by the increase in length of the tub 16 and the drum 20 , of the drum type washing machine according to the present invention.
  • FIG. 4 is a graph illustrating the tilt degree of the tub and the drum at the entrance sides of the tub and the drum depending upon the change in weight of wash water and laundry to be cleaned in the conventional drum type washing machine and the drum type washing machine according to the present invention.
  • the vertical axis indicates the tilt degree of the tub and the drum
  • the horizontal axis indicates the weight of laundry to be cleaned and the wash water.
  • the downward tilt angle of the tub and the drum is marked with minus ( ⁇ )
  • the upward tilt angle of the tub and the drum is marked with plus (+).
  • the entrance side of the tub tilts downward by an angle of approximately ⁇ 2.0 degrees.
  • the downward tilt degree of the tub at the entrance side of the tub gradually decreases, but, after the weight of the laundry and the wash water exceeds approximately 10 kg, the downward tilt degree of the tub at the entrance side of the tub gradually increases.
  • the entrance sides of the tub and the drum tilt downward by an angle of approximately ⁇ 3.0 degrees.
  • the entrance sides of the tub and the drum tilt upward by an angle of approximately +0.5 degrees, when laundry to be cleaned and wash water are not received into the drum. Even when a maximum amount of the laundry and the wash water are received into the drum, with the result that the weight of the laundry and the wash water reaches approximately 30 kg, the entrance sides of the tub and the drum do not tilt downward by an angle of more than approximately ⁇ 1.0 degree.
  • the drum type washing machine according to the present invention is constructed in a structure in which, when the capacity of the drum type washing machine generally used when a user operates the drum type washing machine, i.e., the weight of laundry to be cleaned and wash water, reaches 18 kg (for example, 6 kg of the laundry and 12 kg of the wash water), the entrance side of the tub 16 tilts approximately neither upward nor downward, but is maintained level.
  • the drum type washing machine according to the present invention is characterized by the tilt reduction unit, and therefore, it is possible to minimize the downward tilt degree of the tub at the entrance side of the tub when laundry to be cleaned and wash water are received into the drum.
  • the downward tilt degree of the tub at the entrance side of the tub is minimized according to the present invention. Consequently, it is possible to increase the capacities of the tub and the drum without changing the size of the case, forming the external appearance of the washing machine.
  • the downward tilt degree of the tub at the entrance side of the tub is minimized according to the present invention. Consequently, it is possible to minimize vibration generated from the tub during the rotation of the drum.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Adjustment And Processing Of Grains (AREA)
US12/081,022 2007-04-10 2008-04-09 Washing machine Abandoned US20090071199A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2007-0034989 2007-04-10
KR1020070034989A KR100808203B1 (ko) 2007-04-10 2007-04-10 드럼 세탁기

Publications (1)

Publication Number Publication Date
US20090071199A1 true US20090071199A1 (en) 2009-03-19

Family

ID=39296891

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/081,022 Abandoned US20090071199A1 (en) 2007-04-10 2008-04-09 Washing machine

Country Status (4)

Country Link
US (1) US20090071199A1 (de)
KR (1) KR100808203B1 (de)
CN (2) CN201136982Y (de)
DE (1) DE102008018047B4 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110023554A1 (en) * 2009-07-31 2011-02-03 Bsh Home Appliances Corporation Damping system for a household appliance
US10011937B2 (en) 2015-11-23 2018-07-03 Whirlpool Corporation Laundry treating appliance and method of assembly

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4439153C2 (de) 1994-11-03 2001-03-01 Miele & Cie Trommelwaschmaschine mit einem schwingend befestigten Waschaggregat
DE10227036C1 (de) 2002-06-17 2003-11-20 Miele & Cie Waschaggregat für eine Waschmaschine
KR20050012393A (ko) * 2003-07-25 2005-02-02 엘지전자 주식회사 드럼세탁기의 서스펜션 스프링 체결용 브라켓
BRPI0509614A (pt) 2004-04-05 2007-09-18 Charles Caulder Bree sistema de construção modular para estruturas flutuantes tais como barcos

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110023554A1 (en) * 2009-07-31 2011-02-03 Bsh Home Appliances Corporation Damping system for a household appliance
WO2011012591A1 (en) * 2009-07-31 2011-02-03 BSH Bosch und Siemens Hausgeräte GmbH Damping system for a household appliance
US10011937B2 (en) 2015-11-23 2018-07-03 Whirlpool Corporation Laundry treating appliance and method of assembly

Also Published As

Publication number Publication date
DE102008018047A1 (de) 2008-11-13
CN101161910A (zh) 2008-04-16
KR100808203B1 (ko) 2008-02-29
DE102008018047B4 (de) 2018-07-26
CN201136982Y (zh) 2008-10-22

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AS Assignment

Owner name: LG ELECTRONICS INC., KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KWON, IG GEUN;LIM, HEE TAE;KIM, HEUNG GI;AND OTHERS;REEL/FRAME:021917/0647;SIGNING DATES FROM 20080908 TO 20081008

STCB Information on status: application discontinuation

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