US20040035155A1 - Drum type washing machine - Google Patents

Drum type washing machine Download PDF

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Publication number
US20040035155A1
US20040035155A1 US10/416,733 US41673303A US2004035155A1 US 20040035155 A1 US20040035155 A1 US 20040035155A1 US 41673303 A US41673303 A US 41673303A US 2004035155 A1 US2004035155 A1 US 2004035155A1
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United States
Prior art keywords
drum
shaft
drum shaft
rotation
washing machine
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
US10/416,733
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English (en)
Inventor
Seong-No Yoon
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: YOON, SEONG-NO
Publication of US20040035155A1 publication Critical patent/US20040035155A1/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
    • D06F23/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry 
    • D06F23/02—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry  and 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
    • D06F37/02—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
    • D06F37/30—Driving arrangements 
    • D06F37/304—Arrangements or adaptations of electric motors

Definitions

  • the present invention relates to a drum type washing machine, and more particularly, to a drum type washing machine, in which one pair of drums are mounted in a tub to be rotatable in opposite directions for washing.
  • the drum type washing machine carrying out washing by a friction force between a drum rotated as a driving power of a motor part is received, and laundry in a state detergent, washing water, and the laundry are introduced into the drum, gives little damage to the laundry, has little entangling of the laundry, and can provide a washing effect of pounding and rubbing the laundry.
  • FIG. 1 illustrates a cross section of a related art drum type washing machine schematically
  • FIG. 2 illustrates an enlarged view of “A” part in FIG. 1, referring to which the related art drum type washing machine will be explained.
  • a left side on the drawing is a front part of the drum type washing machine
  • a right side on the drawing is a rear part of the drum type washing machine.
  • the related art drum type washing machine is provided with a cylindrical tub 2 inside of a cabinet 1 , and a cylindrical drum 3 rotatably fitted inside of the cylindrical drum 3 .
  • a motor housing 10 a in rear of a rear wall 2 a of the tub 2 fastened thereto by fastening means 19 with a space for fitting a front, and a rear bearing 17 , and 18 for rotatably supporting a driving shaft 3 b.
  • the laundry repeats cycling of being lifted up to a certain height along an inside surface of the drum 2 while rolling, and falling down by a lifter (not shown) on an inside surface of the drum 2 , during which washing is done by the friction occurred between the laundry, the drum 2 , and the lifter.
  • a lifter not shown
  • the one direction rotation of the drum 2 for a preset time period makes the laundry in the drum 2 to continue one direction rolling, and rotation, and falling down to the lower part of the drum, that causes partially concentrated washing, not uniform washing throughout the laundry, resulting in non-uniform washing, and require much time.
  • the continuous one direction rolling, and rotation of the laundry during washing makes many pieces of the laundry in the drum 2 to be liable to entangle to one another, and continue the one direction rotation in an entangled state, to result in damage to the laundry.
  • the present invention is directed to a 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 is to provide a drum type washing machine, which can prevent entangling of laundry, and enhance a washing efficiency.
  • the drum type washing machine includes a tub fitted in a cabinet, and a pair of drums fitted in the tub to be rotatable in opposite directions.
  • the pair of drums includes an outer drum rotatably fitted in the tub, and an inner drum rotatably fitted in the outer drum having a diameter and a length smaller than the outer drum, respectively.
  • the outer drum preferably includes an inward ridge projected radially from a circumference of the outer drum at a position opposite to a fore end of the inner drum for maintaining sealing between the inner drum and the outer drum, and further provided with sealing means for preventing infiltration of water into a gap between the ridge and the inner drum.
  • the inner drum has a rear end connected to the rotor in a motor part by an inner drum shaft, there is a stator fixed to a rear end of a rear wall of the tub inside of the rotor, the outer drum has a rear end fixed to an outer drum shaft, and the outer drum shaft has a rotation force transmission device provided thereto for transmission of the rotation force of the inner drum shaft to the outer drum shaft.
  • the outer drum shaft is rotatably supported at an outer circumference thereof on a front bearing fitted an a fore end of a gear box housing formed in a rear wall of the tub
  • the inner drum shaft is rotatably supported at an outer circumference thereof on a rear bearing fitted at a rear end of the bearing housing.
  • the rotation force transmission device includes a gear box fixed inside of the gear box housing having opened fore end and rear end for allowing the inner, and outer drum shaft to pass therethrough or be inserted therein, a sun gear fitted coaxially with the inner drum shaft for interlocked rotation with the inner drum shaft, a plurality of planetary gears for being rotated by receiving rotation force from the sun gear, a shaft extension extended from the rear end of the outer drum shaft having an inner circumference with a gear part for engagement with the planetary gears, a carrier having a rotation shaft in front of a base, which is a rotation center of the planetary gears, and an extension in rear of the base positioned between the inner drum shaft and a rear opening in the gear box, first one way rotation means between an outside circumference of the inner drum shaft and an inside circumference of the outer drum shaft for permitting one way interlocked rotation of the inner, and outer drum shafts, and second one way rotation means between an inside circumference of the rear end opening in the gear box and an outside circumference of the extension of the carrier for
  • the sun gear is formed as a unit with the inner drum shaft, and the planetary gear includes two gears having radiuses, and numbers of teeth, both different from each other fixed as one unit coaxially.
  • the carrier rotates in a direction the same with a rotation direction of the inner drum shaft centered on an axis of the inner drum shaft as the inner drum shaft rotates.
  • the first, and second one way rotation means may be one way bearings.
  • the drum type washing machine further includes sealing means between an outside circumference of the inner drum shaft in rear of the oilless bearing and an inside circumference of the extension of the carrier.
  • the first one way rotation means permits opposite direction rotation of the inner drum shaft and the outer drum shaft in washing, and holds the outer drum shaft so as to rotate in a direction the same with the inner drum shaft in spinning.
  • the second one way rotation means restricts such that the gear box and the carrier rotate in the same direction in washing, and permits opposite direction rotation of the gear box and the carrier in spinning.
  • the shaft extension has a diameter greater than a diameter of the outer drum shaft, and smaller than a diameter of the gear box.
  • the inner drum is rotated as the inner drum receives a driving force from a driving motor separately fitted to one side of the tub
  • the outer drum is fixed to the outer drum shaft at a rear end thereof
  • the outer drum shaft is provided with a rotation transmission device for transmission of a rotation force from the inner drum shaft to the outer drum shaft.
  • a power transmission to the inner drum is made by a driving motor fitted in a lower part of the tub, a motor pulley coupled to the driving motor, a drum pulley coupled to the inner drum shaft, and belt means for transmitting the rotation force from the motor pulley to the drum pulley.
  • the tub preferably includes a bearing housing formed as one unit therewith at a central part thereof having a front part and a rear part fitted with a front bearing and a rear bearing respectively, for supporting an outside circumference of the outer drum shaft, and there is preferably a gear box in rear of a rear wall of the tub for holding the rotation transmission device therein.
  • the gear box includes a flange formed along an outside circumference of a front part for fastening the gear box to the rear wall of the tub by fastening means.
  • the flange has a plurality of holes along a circumference for passing fastening means, and the tub has fastening holes in the rear wall at positions corresponding to the holes in the flange.
  • the drums include a plurality of lifters elongated along an axis direction, and projected form an inside surface to a radial direction.
  • the lifter on the inside surface of the inner drum has a section becoming the smaller as it goes to a front part in an axis direction
  • the lifter on the inside surface of the outer drum has a section becoming the smaller as it goes to a rear part in an axis direction.
  • the lifter has a triangular section, or preferably, the lifter has an “M” section, to form a groove in a top part in a radial direction.
  • the lifter on the inside surface of the inner drum has a helical form for moving the laundry and water in the drum forward (door side) along an axis direction as the inner drum rotates in washing
  • the lifter on the inside surface of the outer drum has a helical form for moving the laundry and water in the drum backward along an axis direction as the outer drum rotates in washing.
  • a drum type washing machine including an outer drum rotatably fitted in a tub, having a rear end an outer drum shaft fixed thereto, the outer drum shaft having a rear end coupled to a stator fixed to a rear end of a rear wall of the tub, an inner drum rotatably fitted in the outer drum, having a rear end an inner drum shaft fixed thereto, the inner drum shaft having a rear end coupled to a rotor in the motor part, a gear box housing extended in a rear direction from a front through hole formed in a central part in rear of a rear wall of the tub formed as one unit with the rear wall, to form a cavity, having a rear through hole in a rear end thereof, a front bearing, and a rear bearing fitted in the front through hole and the rear through hole for rotatably supporting an outside circumference of the outer drum shaft and the outside circumference of the inner drum shaft, respectively, and a rotation force transmission device including a gear box fixed inside of the gear box housing having
  • a drum type washing machine including an outer drum rotatably fitted in a tub, having a rear end an outer drum shaft fixed thereto, the outer drum shaft having a rear end passed through a central part of a rear wall of the tub to outside thereof, a driving motor fitted in a lower part of the tub having a driving shaft coupled to a motor pulley, an inner drum rotatably fitted in the outer drum, having a rear end an inner drum shaft fixed thereto, the inner drum shaft having a rear end coupled to a drum pulley for receiving a rotation force from the driving motor by means of belt means, a gear box fastened to a rear side of the rear wall of the tub by fastening means, having openings in a front end, and a rear end for passing, or inserting the inner, and the outer drum shafts, and a cavity therein, a front bearing, and a rear bearing fitted in a front part, and rear part of the bearing housing for rotatably supporting an outside circum
  • the drum type washing machine of the present invention permits to obtain an excellent washing effect because an entire surface of laundry is made to make uniform friction with the inner drum and the outer drum, and to prevent entangling of the laundry because the laundry is washed during the laundry goes back and forth the inner drum and the outer drum, alternately.
  • FIG. 1 illustrates a cross section of a related art drum type washing machine schematically
  • FIG. 2 illustrates an enlarged view of “A” part in FIG. 1;
  • FIG. 3 illustrates a cross section of a drum type washing machine in accordance with a first preferred embodiment of the present invention
  • FIG. 4 illustrates an enlarged view of a key part of FIG. 3
  • FIG. 5 illustrates a cross section of a drum type washing machine in accordance with a second preferred embodiment of the present invention
  • FIG. 6 illustrates lifters employed in the drum type washing machine of the present invention, schematically
  • FIG. 7 illustrates a variation of a lifter employed in the drum type washing machine of the present invention, schematically.
  • FIG. 8 illustrates another variation of a lifter employed in the drum type washing machine of the present invention, schematically.
  • a left side on the drawing is a front side of a drum type washing machine
  • a right side on the drawing is a rear side of the drum type washing machine.
  • FIG. 3 illustrates a cross section of a drum type washing machine in accordance with a first preferred embodiment of the present invention
  • FIG. 4 illustrates an enlarged view of a key part of FIG. 3, referring to which a system and operation of the drum type washing machine of the present invention will be explained.
  • the drum type washing machine in accordance with a first preferred embodiment of the present invention includes a tub 100 inside of a cabinet, and an outer drum 200 having an opening in a front part rotatably fitted inside of the tub 100 .
  • the outer drum 200 has an inward ridge 230 at a position opposite to a fore end of the inner drum 300 , which may, or may not be formed as one unit with the outer drum 200 .
  • sealing means 330 at the fore end of the inner drum 300 adjacent to the inward ridge 230 fastened by fastening means 330 a, such as bolt, or screw, for preventing the laundry from coming into a gap between the inner drum 300 and the outer drum 200 .
  • the sealing means 330 in a form of a circular ring having a diameter in correspondence to the diameter of the inner drum 300 , and a width, is fastened along an edge of the fore end of the inner drum 300 by the fastening means 330 a.
  • the sealing means 330 may be fitted to the inner drum 300 such that a fore end of the sealing means 330 is in contact with the inward ridge 230 , for preventing the laundry from coming into the gap, the contact between the sealing means 330 and the inward ridge 230 may cause problems of friction noise, and wear during rotation of the drums 200 , and 300 . Therefore, it is preferable that there is a minimum gap between the inward ridge 230 and the sealing means 330 enough to prevent the inward ridge 230 and the sealing means 330 from coming into contact.
  • the sealing means 330 is preferably formed of plastic having little noise, and being heat, and abrasion resistant.
  • the inner drum 300 and the outer drum 200 of the present invention is fitted to be rotatable by the motor part 50 connected through a shaft in rear of the inner drum 300 and the outer drum 200 , which will be explained in detail.
  • an inner drum shaft 310 having one end fixed to a rear end of the inner drum 300 , and a rear end passed through the rear wall 120 of the tub 100 , and coupled with the motor part 10 in rear of the tub 100 .
  • a spider 220 fixed to a rear end of the outer drum 200 , and an outer drum shaft 210 connected to a central part of the rear end of the outer drum 200 , for taking rotation force of the inner drum shaft 310 through a rotation force transmission device, and first, and second one way rotation means 401 , and 402 , which will be explained, later.
  • gear box housing 130 in rear of a rear wall 120 of the tub 100 having a cavity formed as a unit with the tub 100 , in which the outer drum shaft 210 , and the inner drum shaft 310 are rotatably fitted, together with the rotation force transmission device.
  • gear box 90 inside of the gear box housing 130 , having openings in front, and rear part.
  • the gear box housing 130 has a front through hole 121 in a central part of a front part of the gear box housing 130 (i.e., the rear wall 120 of the tub 100 ), and a rear through hole 122 in a central part of rear of the gear box housing 130 with a diameter enough to pass the inner drum shaft 310 .
  • an inner lace of the front bearing 61 rotatably supports an outer circumference of the outer drum shaft 210
  • an inner lace of the rear bearing 62 rotatably supports an outer circumference of the inner drum shaft 310 .
  • both the outer drum shaft 210 and the inner drum shaft 310 pass through the rear wall 120 of the tub 100 , and are rotatably supported, and take rotation force of the motor part 10 , in rear of the rear wall 120 , which will be explained, in detail.
  • the inner drum shaft 310 passes through the rear through hole 122 of the gear box housing 130 , and coupled with a rotor 50 a in the motor part 50 by known fastening means, such as bolt, and the like, at a rear end thereof.
  • a stator 50 b fitted to a rear end of the gear box housing 130 , with magnets 51 of the rotor 50 a devised to come opposite to the stator 50 b in an outer side of the stator 50 b in a radial direction, to form a motor part 50 for generating the rotating force by means of the rotor 50 a and the stator 50 b.
  • the rotor 50 a rotates in regular/reverse direction, to rotate the inner drum 300 in regular/reverse direction too as the inner drum shaft 310 coupled to the rotor 50 a rotates.
  • the inner drum 300 and the outer drum 200 are designed to rotate in opposite directions (for an example, the inner drum rotates in a clockwise direction, while the outer drum rotates in a counter clockwise direction) in washing, and to rotate in the same direction (for an example, both the inner drum, and the outer drum rotate in the counter clockwise direction) in spinning.
  • the opposite direction rotation of the inner drum 300 , and the outer drum 200 is implemented by the rotation force transmission device, and the same direction rotation of the inner drum 300 , and the outer drum 200 is implemented by the first, and second one way rotation means 401 , and 402 , permitting a reverse direction rotation of the outer drum 200 with respect to a rotation direction of the inner drum 300 in washing, and the same direction rotation of the inner drum 300 and the outer drum 200 in spinning.
  • the spider 220 is fixed to the rear end of the outer drum 200
  • the outer drum shaft 210 is fixed to a central part of rear end of the outer drum 200
  • the outer drum shaft 210 has a cylindrical shaft extension 215 extended to inside of the gear box 90 , inside of which there is a gear part 215 a.
  • the shaft extension 215 has a diameter greater than a diameter of the outer drum shaft 210 , and smaller than a diameter of the gear box 90 .
  • planetary gears 71 , and 72 for taking, and being rotated by a rotation force of the sun gear 315 , each of which planetary gears 71 , and 72 has two gears fitted coaxially as one unit, with different radiuses, and number of teeth.
  • the planetary gears 71 , and 72 are supported on respective rotation shafts 81 on a base 82 of a carrier 80 , and engaged with the gear part 215 a of the shaft extension 215 , for transmission of a rotation force of the sun gear 315 to the outer drum shaft 210 .
  • the rotation force transmission device implements the opposite direction rotation of the inner drum 300 and the outer drum 200 of the present invention in washing.
  • the inner drum 300 and the outer drum 200 are required to rotate in the same direction at a fast speed in spinning, to require separate means for rotating the inner drum 300 and the outer drum 200 in the same direction, which is implemented by the first, and second one way rotation means 401 , and 402 which will be explained in detail.
  • first one way rotation means 401 between the outer circumference of the inner drum shaft 310 and the inner circumference of the outer drum shaft 210 for one way interlocked rotation of the inner, and outer drum shafts 310 , and 210 .
  • second one way rotation means 402 between the inner circumference of the rear end opening of the gear box 90 , and the outer circumference of the extension 83 of the carrier 80 for one way rotation of the carrier 80 .
  • the first, and second one way rotation means 401 , and 402 may be one way bearings, for forming an interlocked rotation system in which, for an example, when the rotor 50 a is rotated in the counter clockwise direction in spinning to rotate the inner drum rotation shaft 310 in the counter clockwise direction, the outer drum shaft 210 is also rotated in the counter clockwise direction like the inner drum shaft 310 by restriction of the first one way rotation means 401 .
  • both the inner drum shaft 210 , and the outer drum shaft 310 are rotated in the counter clockwise direction, both the sun gear 315 on the inner drum shaft 310 , and the planetary gears 71 , and 72 engaged with the gear part 215 a of the shaft extension 215 are remained stationary.
  • the carrier 80 is also rotated in the counter clockwise direction interlocked with the inner, and outer drum shafts 310 , and 210 .
  • the second one way rotation means 402 is fitted so as not to restrict the rotation in a rotation direction (counter clockwise direction) of the carrier 80 .
  • the reason that the second one way rotation means 402 is fitted such that counter clockwise rotation of the carrier 80 is permitted, while clockwise rotation of the carrier 80 is not permitted, is as follows. That is, rotation directions of the inner drum shaft 310 and the outer drum shaft 210 are opposite in washing, when the carrier 80 has a rotation direction the same with the inner drum shaft 310 . In this instance, if rotation of the carrier 80 is restricted, a rotation force of the outer drum shaft 210 can be maintained, positively.
  • FIG. 5 illustrates a cross section of a drum type washing machine in accordance with a second preferred embodiment of the present invention.
  • the drum type washing machine in accordance with a second preferred embodiment of the present invention includes a driving motor 30 fixed on one side of a tub 100 , and a motor pulley 34 fitted on a shaft of the driving motor 30 .
  • a drum pulley 214 coupled to a rear end of an inner drum shaft 310 fixed to a central part of a rear end of an inner drum 300 , and the drum pulley 214 is connected to the motor pulley 34 by belt means 35 , for transmission of a rotation force of the driving motor to the inner drum 300 .
  • an outer drum 200 having a rear end fixed to an end of an outer drum shaft 210 , which receives a rotation force from the inner drum shaft 310 through a rotation transmission device, and first, and second one way rotation means 401 , and 402 almost identical to ones in the first embodiment.
  • a bearing housing 120 a in a central part of a rear wall 120 of the tub 100 formed as one unit with the rear wall 120 , and there are a front bearing 61 , and a rear bearing 62 at a front part, and a rear part of the bearing housing 120 a respectively, for rotatably supporting an outer circumference of the outer drum shaft 210 .
  • a cylindrical gear box 90 in rear of the rear wall 120 of the tub 100 for holding the rotation transmission means therein having a flange 91 at a front part thereof formed along an outer circumference for fastening by means of fastening means 93 , such as bolts, and the like, fastened to the rear wall 120 of the tub 100 .
  • the flange 91 has a plurality of holes 91 a along a circumference thereof for passing the fastening means 93
  • the rear wall 120 of the tub 100 has fastening holes 121 at positions in correspondence to the holes 91 a for mounting the gear box 90 to the tub 100 .
  • FIG. 6 illustrates lifters employed in the drum type washing machine of the present invention, schematically.
  • the lifter 360 on an inside surface of the inner drum 300 has a helical form, so that, as shown in the drawing, the inner drum 300 pushes the laundry, and water held in the inner drum 300 forward along an axis direction of the inner drum 300 as the inner drum 300 rotates in an arrow direction ‘a’ (for an example, a clockwise direction) in washing.
  • the lifter 260 on an inside surface of the outer drum 200 has a helical form, so that the outer drum 200 pushes the laundry, and water held in the outer drum 200 backward along an axis direction of the outer drum 200 as the outer drum 200 rotates in an arrow direction ‘b’ (for an example, a counter clockwise direction) in washing.
  • the lifter 260 has a section formed the smaller as it goes from the front part to the rear part of the drum
  • the lifter 360 has a section formed the smaller as it goes from the rear part to the front part of the drum. Therefore, when the outer drum 200 and the inner drum 300 rotate in directions opposite to each other, the laundry held in the outer drum 200 gradually moves toward the inner drum 300 together with washing water as the laundry repeats cycling of rolling, and being lifted upward by the lifter 260 , and falling down. The laundry moved to the inner drum 300 gradually moves toward the outer drum 200 together with washing water as the laundry repeats cycling of rolling, and being lifted upward by the lifter 360 , and falling down.
  • FIG. 7 illustrates a variation of a lifter employed in the drum type washing machine of the present invention, schematically.
  • the lifter 270 , or 370 has a triangular section; the lifter 270 has a section becoming the smaller as it goes from a front part to a rear part of the drum, and the lifter 370 has a section becoming the smaller as it goes from a rear part to a front part of the drum.
  • FIG. 8 illustrates another variation of a lifter employed in the drum type washing machine of the present invention, schematically.
  • the lifter 280 has a section becoming the smaller as it goes from a front part to a rear part of the drum
  • the lifter 380 has a section becoming the smaller as it goes from a rear part to a front part of the drum.
  • the lifter 280 , or 380 has an “M” section to form a groove 280 a, or 380 a for forming a partial vortex at a radial inward top of the lifter 280 , or 380 .
  • the groove 280 a, or 380 a is formed at a radial inward top of the lifter 280 , or 380 to form partial vortex at the groove 280 a, or 380 a in washing, for enhancing a washing efficiency.
  • the drum type washing machine of the present invention has an advantage of enhanced washing performance as the one pair of drums fitted inside of a tub designed to rotate in opposite directions in washing, form opposite direction water flows on the same time in a washing space of the drums, to make an entire surface of the laundry to come into friction with inside surfaces of the inner drum and the outer drum, uniformly, and another advantage of preventing entangling of the laundry since the laundry is washed as the laundry goes back and forth the inner drum and the outer drum alternately.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
US10/416,733 2000-11-15 2001-11-15 Drum type washing machine Abandoned US20040035155A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1020000067719A KR100763367B1 (ko) 2000-11-15 2000-11-15 드럼세탁기
KR2000-67719 2000-11-15
PCT/KR2001/001948 WO2002040761A1 (en) 2000-11-15 2001-11-15 Drum type washing machine

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US20040035155A1 true US20040035155A1 (en) 2004-02-26

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US (1) US20040035155A1 (zh)
EP (1) EP1334226B1 (zh)
JP (1) JP4131540B2 (zh)
KR (1) KR100763367B1 (zh)
CN (1) CN1283876C (zh)
AU (2) AU2417402A (zh)
DE (1) DE60141032D1 (zh)
WO (1) WO2002040761A1 (zh)

Cited By (19)

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US20040123631A1 (en) * 2002-12-27 2004-07-01 Jae-Won Chang Drum type washing machine
US20040163429A1 (en) * 2002-12-11 2004-08-26 Lim Hee Tae Dual-motor drum-type washing machine
US20050274159A1 (en) * 2004-06-09 2005-12-15 Lg Electronics Inc. Drum type washing machine and drum therefor
US20080307833A1 (en) * 2004-07-20 2008-12-18 Lg Electronics Inc. Drum-type washing machine and bearing housing structure thereof
US20090044574A1 (en) * 2005-09-30 2009-02-19 Lg Electronics Inc. Drum-type washing machine
US20100018261A1 (en) * 2002-12-27 2010-01-28 Jae Won Chang Drum type washing machine
US20100154486A1 (en) * 2008-12-22 2010-06-24 Sung Min Kim Fabric treating apparatus
US7827834B2 (en) 2005-09-30 2010-11-09 Lg Electronics Inc. Bearing housing assembly of drum-type washing machine and drum-type washing machine with the same
US20110197462A1 (en) * 2008-10-16 2011-08-18 Levent Hasanreisoglu Washer/Dryer
USRE43625E1 (en) 2006-03-29 2012-09-04 Lg Electronics Inc. Drum type washing machine
US20130118212A1 (en) * 2011-10-24 2013-05-16 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
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
WO2019035532A1 (en) * 2017-08-18 2019-02-21 Samsung Electronics Co., Ltd. WASHING MACHINE
US10329702B2 (en) * 2014-09-02 2019-06-25 Haier Asia Co., Ltd. Drum washing machine
EP3674469A4 (en) * 2018-02-07 2020-10-21 Wuxi Little Swan Electric Co., Ltd. SUB ASSEMBLY OF A PLANETARY GEAR FOR DRUM WASHING MACHINE AND DRUM WASHING MACHINE
EP3702514A4 (en) * 2018-02-07 2020-11-04 Wuxi Little Swan Electric Co., Ltd. DRUM WASHING MACHINE
CN113957656A (zh) * 2021-10-28 2022-01-21 山东术衣博士消毒科技股份有限公司 多舱并联可同步的水洗机

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CN1531611A (zh) 2004-09-22
AU2002224174B2 (en) 2005-08-25
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JP4131540B2 (ja) 2008-08-13
CN1283876C (zh) 2006-11-08
WO2002040761A1 (en) 2002-05-23
EP1334226A4 (en) 2006-08-02
JP2004513721A (ja) 2004-05-13
KR20020037814A (ko) 2002-05-23

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