US20040163429A1 - Dual-motor drum-type washing machine - Google Patents

Dual-motor drum-type washing machine Download PDF

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Publication number
US20040163429A1
US20040163429A1 US10/731,024 US73102403A US2004163429A1 US 20040163429 A1 US20040163429 A1 US 20040163429A1 US 73102403 A US73102403 A US 73102403A US 2004163429 A1 US2004163429 A1 US 2004163429A1
Authority
US
United States
Prior art keywords
motor
drum
dewatering
washing
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.)
Abandoned
Application number
US10/731,024
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English (en)
Inventor
Hee Lim
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: LIM, HEE TAE
Publication of US20040163429A1 publication Critical patent/US20040163429A1/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
    • D06F37/30—Driving arrangements 
    • D06F37/40—Driving arrangements  for driving the receptacle and an agitator or impeller, e.g. alternatively
    • 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
    • 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
    • D06F37/30—Driving arrangements 
    • D06F37/304—Arrangements or adaptations of electric motors
    • 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 
    • D06F37/32—Driving arrangements  for rotating the receptacle at one speed only
    • D06F37/34—Driving arrangements  for rotating the receptacle at one speed only in opposite directions, e.g. oscillating
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors

Definitions

  • the present invention relates to a drum-type washing machine, and more particularly, to a dual-motor drum-type washing machine, in which a washing motor and a dewatering motor are separately provided, and a pair of drums are employed, to enable a dual-drum motion effect.
  • a drum-type washing machine performs washing using a frictional force between laundry and a drum, which is rotated by a transferred driving force of a motor with detergent, water, and the laundry placed in the drum.
  • a drum-type washing machine prevents the laundry from being damaged and entangled and brings about such washing effects as beating and rubbing.
  • FIG. 1 illustrating a drum-type washing machine according to a related art
  • a cylindrical tub 2 made of a stainless steel based material is installed within a cabinet 1
  • a cylindrical drum 3 is rotatably installed within the tub 2 .
  • a motor 5 is installed at one side under the tub 2 , and a motor pulley 151 is connected to the motor 15 by a shaft.
  • a drum shaft 31 is installed at a rear side of the drum 3 , and a drum pulley 32 is installed at a rear end of the drum shaft 31 .
  • the drum pulley 32 is rotatably coupled with the motor pulley 151 , which is rotatably connected to the motor 15 via a belt 16 as a power transfer element.
  • a suspension spring 24 is installed between the inner surface of the upper part of the cabinet 1 and the outer surface of an upper part of the tub 2 , to support the tub 2 ; and a friction damper 25 is installed between the inner surface of the lower part of the cabinet 1 and the outer surface of a lower part of the tub 2 , to attenuate vibrations that develop in the tub 2 on dewatering.
  • the tub 2 consists of a tub cover 21 forming the front of the tub 2 , a tub body 22 forming the sidewall of the tub 2 , and a back cover 23 forming the rear of the tub 2 .
  • a bearing housing 4 in which bearings 4 a and 4 b are installed, is assembled at the rear of the drum 3 , to be fixed to a central portion of the back cover 23 and receive the drum shaft 31 .
  • Three wing portions 41 are integrally formed to radiate from the 120° points about the circumference of the bearing housing 4 . End portions of the wing portions 41 are fixed to a rear end of the tub body 22 by a fixing bracket 14 and a bolt 8 , which are assembled to be fixed to the back cover 23 .
  • a balance weight 26 is provided to a front side of the tub 2 for compensation.
  • the above-constructed drum-type washing machine is driven by the motor 15 , which is typically a brushless DC (BLDC) motor, a universal motor, or the like.
  • BLDC brushless DC
  • These motors are advantageous in that their rotational speed and direction can be accurately controlled but are expensive to manufacture, and their use results in increased power consumption as well as higher production costs.
  • a full-automatic washing machine employing a pulsator enables adoption of a method of partially rotating the tub as well as the pulsator, creating a dual-drum motion effect, a washing machine having one drum has difficulty in achieving such an effect since the drum is rotated by one motor only.
  • the present invention is directed to a dual motor drum type washing machine that substantially obviates one or more of the problems due to limitations and disadvantages of the related art.
  • An object of the present invention which has been devised to solve the foregoing problem, lies in providing a dual-motor drum-type washing machine, which reduces production costs and enhances washing and dewatering performance, by using a washing motor and a dewatering motor separately, and by enabling the dual-drum motion effect of a pair of drums through an appropriate control of the motors.
  • a dual-motor drum-type washing machine comprising a washing motor; a washing pulley connected to the washing motor by a belt, the washing pulley having a first shaft wherein a sun gear is formed at a front end of the first shaft; a plurality of planetary gears engaging with the sun gear; a first drum connected to a second shaft extending from a center of a rotational plate ganging shafts of the planetary gears; a dewatering motor; a dewatering pulley connected to the dewatering motor by a belt, the dewatering pulley having a first connecting part penetrated by the first shaft; a cylindrical inner gear case coupled to a front end of the first connecting part, to house the sun and planetary gears, the cylindrical inner gear case having teeth formed on an inner circumferential surface; a second connecting part extending from a central portion of the inner gear case to be penetrated by
  • the rotational speed ratio of the washing motor to the washing pulley is set to 6:1, by adjusting the respective diameters of its motor and pulleys; and the rotational speed ratio of the dewatering motor to the dewatering pulley is preferably set to 1.4:1, by adjusting the respective diameters of its motor and pulleys.
  • the washing and dewatering motors are induction motors.
  • FIG. 1 is a cross-sectional view of a drum-type washing machine according to a related art
  • FIG. 2 is a cross-sectional view of a dual-motor drum-type washing machine according to a preferred embodiment of the present invention.
  • FIG. 3 is a simplified rear view of the dual-motor drum-type washing machine of FIG. 2.
  • a dual-motor drum-type washing machine includes a washing motor 50 (shown as the motor's pulley) operated on washing.
  • a first shaft 70 extends from the center of a washing pulley 52 connected to the pulley of a washing motor 50 by a V-belt 51 to be driven, and a sun gear 72 lying between a plurality of planetary gears 74 is formed at a front end of the first shaft 70 .
  • the sun and planetary gears 72 and 74 are housed in an inner gear case 90 , which itself rotates to transfer a rotational force.
  • the inner gear case 90 is provided with a plurality of teeth formed on its inner circumferential surface for meshing with the planetary gears 74 .
  • the inner gear case 90 is substantially cylindrical and prevents the separation of the planetary gears 74 from the sun gear 72 .
  • the centers of the planetary gears 74 are commonly fixed to a rotational plate 76 , such that their rotation about the sun gear 72 is ganged, and a second shaft 80 extends from the center of the rotational plate 76 to be coupled to a first drum 101 .
  • the first drum 101 is rotated by a motion of the rotational plate 76 and the planetary gears 74 rotating in unison but in opposite directions on opposite sides of the sun gear 72 .
  • a dewatering pulley 62 coupled to a dewatering motor 60 (shown as the motor's pulley) by a V-belt 61 is provided in front of the washing pulley 52 .
  • a shaft passage hole is formed at a center of the dewatering pulley 62 , and a cylindrical first connecting part 91 is formed to coincide with the hole.
  • the first shaft 70 of the washing pulley 52 passes through the shaft passage hole and the first connecting part 91 , and a bearing is installed between the first shaft 70 and the first connecting part 91 to facilitate a rotation of the first shaft 70 .
  • the first connecting part 91 communicates with the inner gear case 90 .
  • a second connecting part 92 is installed at one side of the inner gear case 90 , opposite the first connecting part 91 .
  • the second connecting part 92 has a cylindrical shape through which the second shaft 80 passes, and a bearing is provided to facilitate a rotation of the second shaft 80 .
  • the second connecting part 92 is coupled to a second drum 102 , the interior of which is provided with the first drum 101 , to transfer a rotational force to the second drum 102 .
  • first shaft 70 , second shaft 80 , first connecting part 91 , and second connecting part 92 are rotatably installed.
  • the first and second connecting parts 91 and 92 are coupled to a fixing part connected to the tub 2 of the drum-type washing machine by bearings to facilitate their rotations.
  • the washing and dewatering pulleys 52 and 62 are provided at the center of the tub 2 of the drum-type washing machine, the washing pulley 52 is coupled to the washing motor 50 by the V-belt 51 , and the dewatering pulley 62 is coupled to the dewatering motor 60 by the other V-belt 61 .
  • the washing and dewatering motors 50 and 60 are induction-type motors. Compared to the motor of the related art drum-type washing machine, which is the expensive BLDC or universal motor of high power consumption, the induction motor of low power consumption is inexpensive since it provides a uniform rotational speed and enables only forward and reverse rotations.
  • the rotational speed ratio of the washing motor 50 to the washing pulley 52 is preferably set to 6:1. Such a reduction ratio is adjusted by a diameter difference or gear ratio between the motor and pulley. Meanwhile, the rotational speed ratio of the dewatering motor 60 to the dewatering pulley 62 is preferably set to 1.4:1.
  • the washing motor 50 has a characteristic of periodically rotating the first drum 101 clockwise or counterclockwise, so that a simple motor enabling forward and reverse rotation may be employed, while the dewatering motor 60 is only used to perform dewatering the laundry by a unidirectional high-speed rotation, so that a motor of correspondingly limited characteristic may be employed. Hence, a motor that is less expensive and consumes less power than the washing motor 50 is applicable as the dewatering motor 60 .
  • the washing motor 50 cyclically rotates in the forward or reverse direction on performing a washing step. In case of a short cycle, the following operation takes place.
  • the sun gear 72 at the front end 70 of the first shaft 70 rotates.
  • the planetary gears 74 are then rotated by a rotation of the sun gear 72 to considerably reduce the rotational speed of the planetary gears 74 .
  • the rotational speed ratio of the sun gear 72 to the rotational plate 76 is preferably set to 5.5:1.
  • the inner gear case 90 connected to the dewatering pulley 62 is rotated in the reverse direction by a reaction of a gear mechanism when the sun gear 72 rotates in the forward direction.
  • a rotational force of the inner gear case 90 is transferred to the second drum 102 so that the first and second drums 101 and 102 rotate in opposing directions.
  • Such a motion which achieves the same effect as that of the dual-drum washing method of a pulsator-type washing machine, is achieved by a pair of drums cyclically rotating in opposing directions, to enable the laundry to be evenly soaked in the water and detergent.
  • the first and second drums 101 and 102 first rotate in opposing directions. After a predetermined time passes, the first drum 101 eventually rotates in the direction of the second drum 102 by an inertial force. Thus, the method of the related art drum-type washing machine is implemented.
  • the washing and dewatering motors 50 and 60 are simultaneously driven in the forward direction on dewatering after completion of washing.
  • an initial motive power is enhanced to accelerate the simultaneous rotational speeds of the first and second drums 101 and 102 .
  • the washing motor 50 is turned off so that the second drum 102 is rotated by the dewatering motor 60 only, the first drum 101 also rotates as a result of the inertial force.
  • the dewatering motor 60 is appropriately turned on/off to control their speeds.
  • the dual-motor drum-type washing machine according to the present invention has the following advantages of effects.
  • induction motors are used as the washing and dewatering motors to reduce product cost.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Power Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
US10/731,024 2002-12-11 2003-12-10 Dual-motor drum-type washing machine Abandoned US20040163429A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2002-0078807A KR100493305B1 (ko) 2002-12-11 2002-12-11 듀얼 모터 드럼세탁기
KRP2002-0078807 2002-12-11

Publications (1)

Publication Number Publication Date
US20040163429A1 true US20040163429A1 (en) 2004-08-26

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US10/731,024 Abandoned US20040163429A1 (en) 2002-12-11 2003-12-10 Dual-motor drum-type washing machine

Country Status (3)

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US (1) US20040163429A1 (zh)
KR (1) KR100493305B1 (zh)
CN (1) CN1282785C (zh)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050282681A1 (en) * 2004-04-29 2005-12-22 Bourquim Rene Washing machine gearbox conical structure
US20060010612A1 (en) * 2004-07-16 2006-01-19 Lg Electronics Inc. Driving unit for washing machine and method for controlling the same
US20080060388A1 (en) * 2006-09-13 2008-03-13 General Electric Company Washing machine having self-centering drive assembly
US20090038348A1 (en) * 2007-08-09 2009-02-12 Avantec Costruzioni Meccaniche Multifunction apparatus for execution of exercises of strengthening of muscle systems
WO2014058212A1 (en) * 2012-10-09 2014-04-17 Lg Electronics Inc. Washing machine having dual-drum and assembly method thereof
US9080279B2 (en) 2011-10-24 2015-07-14 Lg Electronics Inc. Washing machine to produce three-dimensional motion
US9512551B2 (en) 2011-10-24 2016-12-06 Lg Electronics Inc. Washing machine to produce three-dimensional motion
US20170342623A1 (en) * 2014-08-29 2017-11-30 Haier Asia Co., Ltd. Drum washing machine
EP3309288A4 (en) * 2016-08-18 2018-07-18 Samsung Electronics Co., Ltd. Washing machine
US20180363225A1 (en) * 2017-06-14 2018-12-20 Dongbu Daewoo Electronics Corporation Wall mounted washing machine and rear panel of the same
EP3444392A1 (en) * 2017-08-18 2019-02-20 Samsung Electronics Co., Ltd. Washing machine
US10329702B2 (en) * 2014-09-02 2019-06-25 Haier Asia Co., Ltd. Drum washing machine
US10364524B2 (en) * 2016-04-08 2019-07-30 Whirlpool Corporation Laundry treating appliance with helical clutch
IT201900004031A1 (it) * 2019-03-20 2020-09-20 S P M Eng S R L Assieme per elettrodomestico di lavaggio
US20210262142A1 (en) * 2018-06-19 2021-08-26 Samsung Electronics Co., Ltd. Washing machine

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0902619D0 (en) * 2009-02-17 2009-04-01 Xeros Ltd Cleaning apparatus
KR101306722B1 (ko) 2012-07-12 2013-09-17 이춘우 세탁기
CN103556430B (zh) * 2013-10-22 2016-04-13 张亚光 一种洗涤桶及洗涤方法
CN104315101B (zh) * 2014-08-28 2017-02-15 黄嘉鸿 一种皮带盘装置
CN107217443A (zh) * 2017-07-18 2017-09-29 慈溪鑫蕾国际贸易有限公司 一种双轴同心分离式传动机构及由其构成的洗衣机
CN107964757B (zh) * 2017-12-26 2022-04-08 佛山海尔滚筒洗衣机有限公司 一种双动力滚筒洗衣机及其控制方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6257027B1 (en) * 1998-03-31 2001-07-10 Kabushiki Kaisha Toshiba Full-automatic washing machine with two drive motors
US6311527B1 (en) * 1998-05-12 2001-11-06 Notetry Limited Method and apparatus for containing and agitating the contents of a container
US20040035155A1 (en) * 2000-11-15 2004-02-26 Seong-No Yoon Drum type washing machine

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JPH0751380B2 (ja) * 1989-06-28 1995-06-05 三洋電機株式会社 ページプリンタにおける印字基準位置設定方法
JPH03121094A (ja) * 1989-10-03 1991-05-23 Sharp Corp ドラム式洗濯機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6257027B1 (en) * 1998-03-31 2001-07-10 Kabushiki Kaisha Toshiba Full-automatic washing machine with two drive motors
US6311527B1 (en) * 1998-05-12 2001-11-06 Notetry Limited Method and apparatus for containing and agitating the contents of a container
US20040035155A1 (en) * 2000-11-15 2004-02-26 Seong-No Yoon Drum type washing machine

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050282681A1 (en) * 2004-04-29 2005-12-22 Bourquim Rene Washing machine gearbox conical structure
US20060010612A1 (en) * 2004-07-16 2006-01-19 Lg Electronics Inc. Driving unit for washing machine and method for controlling the same
US7703307B2 (en) * 2004-07-16 2010-04-27 Lg Electronics Inc. Driving unit for washing machine and method for controlling the same
US20080060388A1 (en) * 2006-09-13 2008-03-13 General Electric Company Washing machine having self-centering drive assembly
US7685665B2 (en) * 2006-09-13 2010-03-30 General Electric Company Washing machine having self-centering drive assembly
US20090038348A1 (en) * 2007-08-09 2009-02-12 Avantec Costruzioni Meccaniche Multifunction apparatus for execution of exercises of strengthening of muscle systems
US9290881B2 (en) 2011-10-20 2016-03-22 Lg Electronics Inc. Washing machine to produce three-dimensional motion
US9556551B2 (en) 2011-10-24 2017-01-31 Lg Electronics Inc. Washing machine to produce three-dimensional motion
US9255354B2 (en) 2011-10-24 2016-02-09 Lg Electronics Inc. Washing machine to produce three-dimensional motion
US9279209B2 (en) 2011-10-24 2016-03-08 Lg Electronics Inc. Washing machine to produce three-dimensional motion
US9080279B2 (en) 2011-10-24 2015-07-14 Lg Electronics Inc. Washing machine to produce three-dimensional motion
US9328447B2 (en) 2011-10-24 2016-05-03 Lg Electronics Inc. Washing machine to produce three-dimensional motion
US9512551B2 (en) 2011-10-24 2016-12-06 Lg Electronics Inc. Washing machine to produce three-dimensional motion
US9528213B2 (en) 2011-10-24 2016-12-27 Lg Electronics Inc. Washing machine to produce three-dimensional motion
WO2014058212A1 (en) * 2012-10-09 2014-04-17 Lg Electronics Inc. Washing machine having dual-drum and assembly method thereof
US9605370B2 (en) 2012-10-09 2017-03-28 Lg Electronics Inc. Washing machine having dual-drum and assembly method thereof
US20170342623A1 (en) * 2014-08-29 2017-11-30 Haier Asia Co., Ltd. Drum washing machine
US10422065B2 (en) * 2014-08-29 2019-09-24 Haier Asia Co., Ltd. Drum washing machine
US10329702B2 (en) * 2014-09-02 2019-06-25 Haier Asia Co., Ltd. Drum washing machine
US10364524B2 (en) * 2016-04-08 2019-07-30 Whirlpool Corporation Laundry treating appliance with helical clutch
EP3309288A4 (en) * 2016-08-18 2018-07-18 Samsung Electronics Co., Ltd. Washing machine
EP3792386A1 (en) * 2016-08-18 2021-03-17 Samsung Electronics Co., Ltd. Washing machine
US11560664B2 (en) 2016-08-18 2023-01-24 Samsung Electronics Co., Ltd. Washing machine
US11047082B2 (en) 2016-08-18 2021-06-29 Samsung Electronics Co., Ltd. Washing machine
US20180363225A1 (en) * 2017-06-14 2018-12-20 Dongbu Daewoo Electronics Corporation Wall mounted washing machine and rear panel of the same
US10711384B2 (en) 2017-08-18 2020-07-14 Samsung Electronics Co., Ltd. Washing machine
US11248329B2 (en) 2017-08-18 2022-02-15 Samsung Electronics Co., Ltd. Washing machine
EP3444392A1 (en) * 2017-08-18 2019-02-20 Samsung Electronics Co., Ltd. Washing machine
US20210262142A1 (en) * 2018-06-19 2021-08-26 Samsung Electronics Co., Ltd. Washing machine
US11479899B2 (en) * 2018-06-19 2022-10-25 Samsung Electronics Co., Ltd. Washing machine
IT201900004031A1 (it) * 2019-03-20 2020-09-20 S P M Eng S R L Assieme per elettrodomestico di lavaggio

Also Published As

Publication number Publication date
KR20040050992A (ko) 2004-06-18
CN1282785C (zh) 2006-11-01
CN1506523A (zh) 2004-06-23
KR100493305B1 (ko) 2005-06-07

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AS Assignment

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

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LIM, HEE TAE;REEL/FRAME:015313/0547

Effective date: 20031211

STCB Information on status: application discontinuation

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