EP1883726B1 - Lave-linge de type a tambour - Google Patents

Lave-linge de type a tambour Download PDF

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Publication number
EP1883726B1
EP1883726B1 EP06768571.9A EP06768571A EP1883726B1 EP 1883726 B1 EP1883726 B1 EP 1883726B1 EP 06768571 A EP06768571 A EP 06768571A EP 1883726 B1 EP1883726 B1 EP 1883726B1
Authority
EP
European Patent Office
Prior art keywords
drum
washing machine
type washing
tub
center
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
EP06768571.9A
Other languages
German (de)
English (en)
Other versions
EP1883726A4 (fr
EP1883726A2 (fr
Inventor
Jong Sun Yoon
Chang Woo 103-201 Hyupseong Apt. SON
Jae Cheol Lyu
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
Priority claimed from KR1020050092364A external-priority patent/KR101275198B1/ko
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP1883726A2 publication Critical patent/EP1883726A2/fr
Publication of EP1883726A4 publication Critical patent/EP1883726A4/fr
Application granted granted Critical
Publication of EP1883726B1 publication Critical patent/EP1883726B1/fr
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
    • D06F37/02—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

Definitions

  • the present invention relates to a drum type washing machine, and more particularly, to a drum type washing machine and a method for fabricating a drum therefore, where a drum suitable for a large capacity is supplied by improving a structure thereof and a method for fabricating the same even without enlarging the exterior size of the drum type washing machine.
  • a washing machine is an appliance used in a house most commonly, which washes clothes, cloth item, articles of clothing and beddings (hereinafter, the laundry) and removes dirt of the laundry by using impact of water, chemical action of detergent and friction force between water current and the laundry through a washing, rinsing and spinning cycle.
  • the washing machine is classified into an agitator type washing machine, a pulsator type washing machine and a drum type washing machine.
  • the agitator type washing machine and the pulsator type washing machine have a drum standing vertically, and the drum type washing machine has a drum standing horizontally.
  • the agitating type washing machine performs washing by using a beating effect created in agitating a washing pole provided in a center of a tub in a right-and left-direction
  • the pulsator type washing machine performs washing by using a friction force between the laundry and water current caused in agitating a pulsator of a circular plate shape formed in a lower portion of a tub in a right-and-left-direction.
  • the drum type washing machine performs washing by using impact created owing to the drop of the laundry and chemical action of detergent once the laundry, washing water and the detergent are mixedly loaded into a drum having plural lifters projected.
  • a tub holding wash water therein is mounted within a cabinet defining an exterior of the drum type washing machine.
  • a drum having the laundry loaded therein is mounted within the tub and a motor rotating the drum is mounted in rear of the tub.
  • a rotation shaft is hingedly connected to a rear side of the drum with passing through the tub.
  • drum type washing machine may be adapted to be built-in or be installed as requested by a user, for example, in the kitchen sink and the drum type washing machine is preferred owing to the recent consumption trend, the popularity and the demand for them. have been drastically increasing.
  • drum type washing machine with the capacity of 6 to 8 kg has been released a lot, the drum capacity has been getting bigger according to the user wish that he/she wishes to wash bigger beddings or bigger laundries at one time.
  • a drum type washing machine with a 13kg drum is popular in the North America and it can be said that a drum type washing machine which was thought as one with small capacity has been getting bigger and bigger.
  • the drum type washing machine with a bigger capacity accompanies a bigger drum. That is why the capacity of the drum type washing machine is determined by a drum size.
  • the conventional drum type washing machine can make the laundry damaged less even with less wash water and enlarging the capacity thereof is limited by the various conditions.
  • KR 2003 0060551 A relates to a drum structure of a drum type washer provided to improve washing effect of the drum type washer by making the rear edges of a drum curved and smoothly moving the laundry.
  • a drum type washer includes a cabinet forming an opening in front; a tub installed inside the cabinet to receive washing water; a drum performing washing actions through a rotating shaft horizontally installed inside the tub; a spider connecting the outer wall of the drum and the rotating shaft of a motor; and plural lifters installed to the inner wall of the drum to make the laundry move vertically.
  • the drum forms a curved surface at the edges to prevent the laundry from being tied up at a part of the drum.
  • the drum comprises a front panel forming an opening and constituting the front of the drum; a rear panel disposed opposite to the front panel; and a center panel installed between the front and rear panels.
  • the rear panel constitutes the rear of the drum.
  • the center panel constitutes the circumferential surface of the drum.
  • GB 1 388 731 A relates to a drum for a washing machine or dryer.
  • the front end wall with a loading aperture, the rear end wall and the central cylindrical part of a clothes washing machine or dryer are joined together adjacent large radius deep-drawn pressed portions of either the end walls or cylindrical portion.
  • the mating edges are provided with perpendicular flanges.
  • the central portion is connected to the front wall by welding and the rear wall by rivets which also hold a spider secured to a support shaft.
  • the lifters are integrally formed in the drum parts.
  • the drum is intended for a dryer having apertures for the ingress of heating air.
  • WO 2005/100672 A1 relates to a drum assembly in washing machines and method for fabricating the same for making a capacity larger and enhancing stiffness and strength.
  • the drum assembly includes a drum for holding laundry, a connector attached to an outside surface of a bottom of the drum, and a driving member coupled to the connector for rotating the drum, wherein the bottom includes an expansion region unoccupied by the connector, the expansion region being protruded toward an outside of the drum, to expand a capacity of the drum.
  • the method includes a first time pressing for pressing a plate for forming a bottom of a drum, for securing a space for expanding a capacity of the drum, and a second time pressing for forming a seat for attaching a connector connecting a driving member and the drum.
  • EP 1 306 479 A2 relates to a washing machine comprising a lifter provided inside the drum, the lifter including a lifter body coupled with the drum and a ball support within the lifter body for supporting washing balls.
  • An object of the present invention devised to solve the problem is to provide a drum type washing' machine which can secure a larger capacity than the conventional drum type washing machine with a large capacity without the change of an exterior drum size.
  • Another object of the present invention devised to solve the problem is to provide a drum type washing machine which can enlarge the drum capacity through only changing the least configuration.
  • a further object of the present invention devised to solve the problem is to provide a drum type washing machine which can control vibration and secure strength of a spider fastening part even as enlarging a drum capacity by improving the structure of the drum capable of determining laundry washing capacity.
  • the present invention may maintain the strength of the drum and the exterior size of the conventional drum type washing machine with a large capacity, and may allow many parts such as a drum center used in public with the enlarged washing capacity.
  • the object of the present invention can be achieved by providing a drum type washing machine.
  • provided herein is a method for fabricating a drum for a drum type washing machine.
  • a drum type washing machine includes a motor, a drum having a drum center of a cylinder shape and a drum back connected to an opening formed in a side of the drum center to define a rear surface of the drum, a connector mounted in the rear surface of the drum, and a rotation shaft connected to the connector to transmit the rotation force of the motor to the drum, wherein the drum back is formed in a bowl shape to have a drum expanding part expanded toward an outer side of the drum from the opening of the drum center and a portion of the drum back where the connector is mounted is recessed toward the inside of the drum to reduce the distance between the drum center and the connector.
  • the distance between the drum center and the connector is very important in determining the entire exterior size of the drum type washing machine, especially the front-and-rear width, because the distance between the drum center and the connector is increased and accordingly the drum capacity is increase, thereby increasing the front-and-rear width of the drum type washing machine.
  • the portion of the drum back where the connector is mounted is recessed toward the inside of the drum to reduce the distance between the drum center and the connector.
  • An internal diameter of the drum center is the same as an internal diameter of a circumference of the drum back connected to the opening formed in a side of the drum.
  • the circumference of the drum back may include a linear part with a predetermined length which is parallel with the center shaft of the drum.
  • drum center and the drum back are not connected perpendicularly. In other words, it is more advantageous to block the bottom of the cylindrical shape with a curved surface in a bowl shape than with a plane surface.
  • the circumference of the drum back may include a linear part with a predetermined length which is parallel with the center shaft of the drum That is because the capacity of the expanding part can be increased by the linear part.
  • the circumference of the drum back and the rear surface of the drum back are formed in a round shape to facilitate the recessed part where the connector is mounted. Also, that is because the dampened laundry tends to be layered and fabric damage may be lessened in a round shape less than in a square shape.
  • the round shape is to minimize the interference between the drum and the tub as well as to secure the tub capacity.
  • the connector is a spider having plural leg parts in a radial direction.
  • the spider may perform its function reliably as well as safely, because it has a fastening part (for example; a bolting part) for fastening the drum thereto and the leg part.
  • a fastening part for example; a bolting part
  • the connector is limited to the spider in the present invention.
  • a tub having a drum rotatably provided therein is further included and the tub has a tub expanding part having a rotation shaft passed through a rear surface thereof and having some of the rear surface expanded backwardly.
  • the motor may be mounted in the rear surface of the tub to be connected to the rotation shaft, and a portion of the rear surface of the tub where the motor is not mounted is expanded backwardly enough to form the tub expanding part. That is, it is preferred that the expanding part is formed in the tub with corresponding to the expanding part in the drum.
  • the tub may be inclinedly provided at a predetermined angle against a bottom of the drum type washing machine. Accordingly, the drum mounted within the tub may be inclinedly provided at a predetermined angle as corresponding thereto.
  • the drum is made of stainless, and the thickness of the drum front and of the drum center is 0.5mm and the thickness of the drum back is 1mm. also preferably, the ratio (d/D) of the drum back depth (d) to the drum diameter (D) is 0.08 - 0.2.
  • the drum back depth means the distance expanded at most from the circumference of the drum back.
  • the ratio of the drum back depth (d) to the drum center length (L2) may be 0.18 ⁇ 0.36.
  • the ratio of the drum front length (L1) to the drum center length (L2) to the drum back depth (d) (L1: L2: d) may be 1: 8.3: 1.5 ⁇ 1: 9.7: 2.7.
  • the internal diameter of the drum center is formed within the range of 500 ⁇ 600mm.
  • a lifter of a triangle shape getting wider from a front portion toward a rear portion is provided within the drum, and the lifter includes a ball installing part formed along a center portion of the lifter in a front-and-rear direction, the ball installing part projectedly formed from the lower surface of the lifter to make the width thereof narrower than the lower surface of the lifter, an oblique surface of a S-shape formed in rear of the opposite sides of the ball installing part, the oblique surface connected to an upper surface of the ball installing part from the lower surface of the lifter, a ball rotatably mounted on the ball installing part, and a wash-water-through-hole formed on the ball installing part.
  • a cabinet for forming an exterior thereof and a back cover for shutting off an access to a rear side of the drum from a rear surface of the cabinet are further included, and the back cover has a projection part projected backwardly in an upper portion thereof.
  • the rear side of the conventional drum type washing machine is spaced apart in a predetermined distance with a wall, because the distance between the drum and the motor may be increased through the projected part of the back cover, without increasing the entire side thereof.
  • the drum further includes a drum front connected to the drum center to form the opening of the drum, and the drum front includes a front minimum internal diameter part, a rear maximum internal diameter part and an oblique part for connecting the front minimum internal diameter part and the rear maximum internal diameter part.
  • a drum front expanding part expanded forwardly is formed in the oblique part, because some portion of the outer oblique surface may be meaningless space in the relationship with the cabinet and the drum capacity may be increased instead of just lessening the meaningless space.
  • a method for fabricating, a drum for a drum type washing machine includes steps of: forming a drum back in a bowl shape with a predetermined part of a bottom thereof projected upwardly by pressing a parent material of a metal plate; trimming unnecessary portions to form a bowl shaped drum back; and piercing plural holes to allow wash water to pass there through except the projected portion of the bottom.
  • the method for fabricating a drum for a drum type washing machine further includes a step of forming plural spider fastening holes on the bottom after or together with the step of piercing plural holes to allow wash water to pass there through except the projected portion of the bottom.
  • the method for fabricating a drum for a drum type washing machine further includes a step of removing a burr which remains after at least one of the piercing step and the spider fastening hole forming step.
  • a drum fabricated by the method for fabricating a drum for a drum type washing machine is provided.
  • a drum type washing machine has an advantageous effect that the collision of the drum expanding part which might be generated in over-vibration of the drum may can be minimized, because the drum expanding part formed in the other portion of the rear part of the drum except the portion where the spider is provided and washing capacity is increased as much as expanded space by the drum expanding part, as well as because the tub expanding part is formed in the other portion of the rear part of the tub except the portion where the motor is provided.
  • the drum type washing machine according to the present invention has another advantageous effect that the expanded area of the drum expanding part may be secured as much as possible, because the internal diameter of the drum center is the same as the internal diameter of the drum back where the drum expanding part is formed.
  • the drum type washing machine according to the present invention has another advantageous effect vibration generated in the drum and the tub may be reduced, because the drum expanding part enhances the strength of the rear part of the drum and the tub expanding part enhances the strength of the rear part of the tub.
  • drum type washing machine according to the present invention has another advantageous effect washing/rinsing efficiency may be improved, because some of the laundry is rotated along the spider recessed toward the inside of the drum under friction force.
  • the drum type washing machine according to the present invention can secure larger washing capacity than the conventional drum type washing machine of the related art without any change of the exterior size thereof.
  • the drum type washing machine according to the present invention has another advantageous effect that many parts such as a drum center which places the center of the drum may be made in common use even with the increased capacity of the drum. Thereby, production cost in fabricating various drum type washing machines having various capacities may be reduced.
  • the drum type washing machine which can increase the drum size without change of the exterior size thereof through the improvement of the drum structure and which can control vibration as well as secure the strength of the spider.
  • FIG. 1 is a sectional view illustrating an embodiment of a drum type washing machine according to the present invention.
  • FIG. 2 is an exploded perspective view illustrating a tub and a drum of FIG. 1 .
  • the drum type washing machine includes a tub 10 supported in a cabinet 2, a drum 20 rotatably mounted in the tub 10, a spider 30 mounted in a rear surface of the drum 20, a motor 40 mounted in the rear surface of the tub 10 and a rotation shaft 50 connected to the spider 30 with passing through the rear part of the tub 10.
  • the cabinet 2 includes a base fan 3, a cabinet body 4 mounted in an upper portion of the base fan 3, a cabinet cover 5 mounted in front of the cabinet body 4 and a top plate 9 mounted in an upper surface of the cabinet body 4.
  • An opening 6 is formed in the cabinet cover 5 to introduce the laundry (m) into the drum 20, and a door 7 is rotatably coupled to the cabinet cover 5 by hinge.
  • a control panel 8 is provided on an upper portion of the cabinet cover 5 or an upper surface of the top plate 9 to allow various cycle or time inputted therein.
  • Wash water (w) needed in washing or rinsing the laundry (m) is held within a lower portion of the tub 10 and the water collected in spinning the laundry (m) is held within the tub 10.
  • the tub 10 is horizontal or inclined at a predetermined angle in a cylindrical shape, and also, an opening 11 formed in front of the tub 10 to introduce the laundry into the drum 20.
  • the tub 10 is connected to the cabinet body 4 by a spring 12, and connected to the base fan 3 by a damper 13, such that vibration may be dampened.
  • a gasket 14 is connected to the tub 10 to prevent the laundry and wash water (w) from being leaked between the cabinet cover 5 and the door 7.
  • a tub expanding part 19 is formed in the tub 10, which is expanded backwardly in a portion of the rear surface 17 of the tub 10 except the portion where the motor 40 is mounted.
  • the tub expanding part 19 is stepped in the rear part 17 to minimize the collision with a drum expanding part, which will be described later, and to enhance the strength of the rear part 17 of the tub 10.
  • the tub 10 includes a front tub 10A having an opening 11 in front thereof and a rear side opened, and a back tub 10B fastened in rear of the front tub 10A and having a front side opened.
  • the tub expanding part 19 is recessed backwardly in the rear part 17 of the back tub 10B.
  • the front tub 10A and the back tub 10B are injection-molded with plastic.
  • the drum 20 is horizontal or inclined at a predetermined angle in a cylindrical shape,
  • the drum 20 has an opening 21 formed in a center of the front side thereof to introduce the laundry (m) or wash water (w) there through and a through-hole 22 formed in a circumferential surface or in a rear surface to introduce wash water (w) there through and a lifter 23 mounted in an inner circumferential surface thereof to lift the laundry, which will be dropped later.
  • the drum 20 is made of metal such as stainless.
  • the drum 20 includes a drum back 25, a drum center 28, a drum front 29 and a drum expanding part 26.
  • the drum back 25 defines a rear part of the drum 20.
  • the drum center 28 has a rear end thereof fastened to the edge of the drum back 25 to define a circumference part of the drum 20 and has the lifter 23 mounted therein.
  • the drum front 29 is fastened to a front end of the drum front 28 to define a front part of the drum 20 and has the opening 21 formed thereon.
  • the drum expanding part 26 is recessed backwardly from the drum back 25.
  • a forming part is formed in a portion of the drum 20 where the spider 30 is provided.
  • the portion where the spider 30 of the drum back 25 is provided (hereinafter, a forming part) is formed by backwardly expanding and forwardly stepping a basic material of the drum 20 at the same time.
  • the forming part 24 is formed corresponding to the appearance of the spider 30, and formed a little bit larger than the spider 30 to allow the spider 30 inserted therein.
  • the forming part 24 is formed deep enough not to project the spider 30 toward the rear surface of the drum 20.
  • the drum expanding part 26 is backwardly expanded in a portion of the rear part of the drum 20 where the forming part 24 is formed.
  • the drum expanding part 26 is formed in a rear part 25 of the drum 20 in plural, so that it may allow the size of the drum 20 be larger as well as to enhance the strength of the rear part 25 of the drum 20 and also may increase friction force of the laundry.
  • the plural drum expanding parts are formed, because the number of the forming part is corresponding to the number of the leg parts of the spider 30. That is, in case that the drum expanding part is formed between the leg parts adjacent to the spider 30, the drum expanding part 26 is formed in plural.
  • the forming part 25 is formed to the inner surface of the drum center 28 in FIG. 1 . However, if the depth of the forming is lessened it can be said that one drum expanding part is formed. That is, in that case, all the space which the drum back 25 forms in rear of the drum center 28, may be called as a drum expanding part.
  • the spider 30 includes a hub part 31 having a front end of the rotation shaft 50 secured thereto and plural leg parts 32, 33 and 34 secured to the drum 20, especially the drum back 25, by fastening means such as a screw.
  • the spider 30 is inserted into the forming part 24 in a rear direction of the drum back 25.
  • the motor 40 includes a stator 42 secured in a center of a rear surface of the tub 10 and a rotor 44 rotated by electromagnetic force formed between the stator 42 and itself.
  • the stator 42 is fastened to the rear surface center 18 of the tub 10 in rear of the tub 10 by fastening means such as a screw.
  • a shaft fastening hole 46 having a rear end of the rotation shaft 50 fastened thereto is formed in the rotor 44.
  • the rotation shaft 50 pass through a through-hole 10C formed in a center of the tub 10, and a first end thereof is fastened to the hub part 31 of the spider 30 and a second end thereof is fastened to the fastening hole.
  • the rotation shaft 50 is rotatably supported in the plural bearings (52) arranged in the opening 10C of the tub 10.
  • the reference A shown in FIG. 1 is the drum expanding space formed in the drum 20 and the reference B is the tub expanding space formed in the tub 10.
  • the reference number 14 shown in FIG. 1 is a water supply device which supplies wash water in which detergent is dissolved or clean wash water (w) in which detergent is not dissolved into the tub 10, and the reference number 15 is a water drainage device which drains the water extracted from the contaminated wash water within the tub 10 or from the laundry outside of the washing machine.
  • the washing machine may allow as much laundry as much space of the drum expanding space A loaded therein.
  • the door 7 is closed.
  • a command on washing/rinsing/spinning is inputted through the control panel 8, the washing machine is operated based on the inputted command.
  • the water supply device 14 supplied wash water into the tub 10 and the wash water supplied into a lower portion of the tub 10 is drawn into the drum 20 through a through- hole 22 of the drum 20 to dampen the laundry (m).
  • the water supply of the water supply device 14 is stopped and the motor 40 is turned on to rotate the spider 30 by using the rotation shaft 50.
  • the drum 20 rotates to lift and drop the laundry and then dirt may be separated off the laundry by chemical action of wash water and detergent.
  • the motor 40 is off and the water drainage device 15 is operated to drain contaminated water outside.
  • the water supply device is operated and the motor 40 is of/off, and the water drainage device is operated to rinse the laundry, like the washing cycle. If a spinning cycle is inputted, the motor 40 is operated in a high speed to centrifugally spin and dehydrate the laundry.
  • the tub 10 has the tub expanding part 19 and the tub expanding space B, such that the collision may not arise or the frequencies of the collision may be lessened.
  • FIGS. 3 to 10 another preferred embodiment of the present will be described.
  • FIG. 3 is a sectional view illustrating another embodiment of the drum type washing machine according to the present invention.
  • FIG. 4 is a sectional view illustrating a drum 20, a lifter and a spider 30 of FIG. 3 .
  • FIGS. 5 and 6 are perspective views of FIG. 4 .
  • FIG. 7 is a perspective view only illustrating a drum back of FIG. 4 from another view different from the view of FIG. 5 .
  • FIG. 8 is a perspective view illustrating the lifter of FIG. 4 .
  • FIG. 9 is a perspective view illustrating a back cover (400) mounted in a rear surface of a cabinet of FIG. 3 .
  • a washing machine includes a tub 100 supported in a cabinet inclinedly at a predetermined angle; a drum 200 rotatably mounted within the tub and having a drum front 290, a drum center 280 and a drum back 270; a spider 300 mounted to a rear surface of the drum back 270; and a direct type motor mounted in a rear surface, of the tub 100.
  • the drum back 270 has a bowl shape, and a portion of a bottom surface thereof corresponding to the spider 300 is recessed forwardly enough not to prevent the spider 300 from being projected toward the drum back 270.
  • the drum back 270 is connected to a first opening of the drum center 280 having a cylindrical shape for defining a rear surface of the drum.
  • the rear surface of the drum 200 is the rear surface of the drum back 270.
  • a portion of the drum back 270 where the spider 300 is mounted is recessed inwardly so that the distance between the drum center 280 and the spider 300 may be entirely lessened. Since the entire width of the drum type washing machine in a front-and-rear direction is set forth to be fixed, the distance between the drum center 280 and the spider 300 is set forth to be fixed.
  • the drum back 270 is entirely bowl-shaped to define the drum expanding part, and the portion of the drum back 270 where the spider 300 is mounted can be said to lessen some expanding area of the drum expanding part.
  • the drum back 270 is bowl-shaped to maximize the expanding area of the drum expanding part, thus, it is preferred that the inner diameter of the drum center 280 is actually the same as that of the drum back circumference connected to the first opening of the drum center 280.
  • the circumference of the drum back 270 includes a linear part with a predetermined length which is parallel with the center of the drum 200. Also, preferably, the circumference of the drum back 270 and the rear surface of the drum back 270 are connected in a round shape.
  • the drum 200 is made of stainless (for example; STS, SGCC, SGCH, SFCH and SECC).
  • the thickness of the drum front 290 and the drum center 280 is 0.5mm, and the thickness of the drum back 270 is 1mm.
  • the ratio (d/D) of the drum back depth (d) to the drum diameter (D) is 0.08 ⁇ 0.2.
  • the ratio of the drum back depth (d) to the drum center length (L2) is 0.18 ⁇ 0.36
  • the ratio of the drum front length (L1) to the drum center length (L2) to the drum back depth (d) is 1: 8.3: 1.5 ⁇ 1: 9.7: 2.7.
  • the drum front 290 is provided, so that the entrance of the opening of the drum 200 which has the least diameter in a ring shape is provided in front, compared to the outer circumference of the drum front which has the largest diameter.
  • the forming part 290a is inserted forwardly on an oblique surface connected from the entrance of the opening to the outer edge. That is, the drum front expanding part 290a is provided on the oblique surface to increase the drum capacity.
  • a lifter 230 is provided in the drum 200, and the lifer 230 is entirely triangle-shaped where a front part is narrower and a rear part is wider.
  • the lifter 230 is formed along a center thereof in a front-and-rear direction and includes a ball installing part (230a) projectedly formed from the lower surface of the lifter to make the width thereof narrower than the lower surface of the lifter, an oblique surface (230b) of a S-shape formed in rear of the opposite sides of the ball installing part and connected to an upper surface of the ball installing part from the lower surface of the lifter, a ball (231) rotatably mounted on the ball installing part, and a wash-water-through-hole (230c) formed on the ball installing part.
  • the oblique surface 230b guides the laundry dropped by the rotation of the drum 200 to move along itself toward the front thereof, such that the laundry is prevented from being sided in rear of the drum 200.
  • the lifter 230 is employed for securing space within the drum 200 owing to the inserted part and the oblique surface as well as for guiding the laundry to solve a problem of laundry unbalance.
  • a back cover 600 is provided in a rear surface of the cabinet 20 for shutting off the access to a rear side of the drum 200, and a forming part is projected toward the rear side of the drum 200 in more than 50% of the section dividing the back cover section. That is, the forming part has a larger section than in the related art.
  • the back cover 600 has a fastening hole and a supporting piece, which are needed in fastening the back cover 600 to the rear surface of the cabinet 20.
  • a bearing housing (BH) is provided in the rear wall of the tub 100 along a circumferential direction, and the bearing housing disclosed in the invention which the applicant invented and filed (Korean Patent Application No. 10-2003-0086841 ) has a wrinkled structure.
  • thickness of a metal basic material defining the drum front 290 or the drum center 280 is 0.5mm
  • thickness of a metal basic thickness defining the drum back 270 is 1mm
  • the thickness of the metal basic material (STS, SGCC, SGCH, SFCH and SECC) is smaller than 0.5mm, there may be a problem that the metal material is ripped in injection molding the drum front 290.
  • the thickness of the metal basic material (STS, SGCC, SGCH, SFCH and SECC) is smaller than 0.5mm, metal bottoms and etc. of the laundry whiling washing or drying the laundry may be collided against the drum center 280 to increase noise.
  • the thickness of the drum back 270 is thick, the cost of material is increased and press pressure is increased. Moreover, assembling the drum 200 is as difficult as the drum 200 is heavy. Since the drum 200 is getting heavy, the tub 100 supporting the drum 200, the fastened portion to the spider 300 and a motor shaft (500) fastened to the spider 300 may have much load.
  • the thickness of the metal basic material is 0.5mm in case of the drum front 290 and the drum center 280 and 1mm in case of the drum back 270.
  • the drum back 270 is fabricated by pressing and deep drawing, the thickness of the metal basic material has a huge effect on the injection molding. That is, since pressing uses softness of metal material. Thereby, in case that the metal basic material is thin, the drum back 270 may not be molded in a needed appearance to expand the inside of the drum back 270.
  • the drum back 270 should be expanded in a predetermined depth but should not be expanded over a predetermined depth to maintain strength thereof.
  • the present invention has been optimized through many experiments to supply a drum structure for a drum type washing machine having a large capacity capable of maintaining strength even with the maximum expansion of the drum back 270.
  • the strength which has been wanted may be secured with preventing the metal basic material from being ripped.
  • the ratio of the drum back depth (d) to the drum center length (L2) is 0.18 ⁇ 0.36 to be safe enough. Also, the ratio of the drum front length (L1) to drum center length (L2) to the drum back depth (d) is 1: 8.3: 1.5 ⁇ 1: 9.7: 2.7.
  • the thickness of the drum front 290 and the thickness of the metal basic material (STS) for the drum center 280 is 0.5mm.
  • the thickness of the drum back 270 is 1mm and an internal diameter of the drum center 280 is 560mm and the drum front length is 36mm.
  • the drum center length is 328 ⁇ 337mm and the maximum drum back depth is 80mm.
  • the forming part 24 and 240 or the drum expanding part 26 or the tub expanding part 19 may be 2-stepped.
  • the forming part 24 and 240 or the drum expanding part 26 may have a reinforcing bid.
  • the drum type washing machine according to the present invention may have the forwardly expanded space, unlike the drum front 290 of the related art. That is, an additional space may be secured in the forming part formed along the circumferential direction.
  • the additional space for increasing washing capacity within the drum 200 may be secured by improving the structure of the lifter, because the portion where the opposite sides of the ball installing part are formed secures some space.
  • the drum back 270 is deeper than that of the related art, the additional space is easily secured.
  • the drum type washing machine of the present invention may secure much more washing capacity than the one of the related art without the increase of exterior size.
  • the top plate 9 is further backwardly projected than the rear surface of the cabinet by a predetermined value to fastening a bracket which secures the top plate to the cabinet (see FIG. 1 ).
  • the rear surface of the cabinet is projected backwardly to avoid the interference with the cabinet and the motor but there may be not change of the exterior size of the drum type washing machine only if the rear surface of the cabinet is not projected to the rear of the top plate.
  • washing capacity may be increased by each additional space from the drum front 290, the lifter and the drum back 270. However, there is no room where the cabinet is projected backwardly, because the top plate is projected toward the rear of the cabinet. Thus, the washing capacity may be increased without any change of the exterior size of the drum type washing machine, even if only the drum back depth is increased.
  • FIG. 10 is a sectional view illustrating a process to describe a method for fabricating the drum back 270 of the drum type washing machine according to the present invention.
  • the basic material (M) made of metal is prepared.
  • the metal basic material is treated in a pressing process to be bowl-shaped and a predetermined area of a bottom thereof is inserted forwardly in a forming step.
  • a trimming step the other parts except the molding part which will define the drum back 270 is trimmed.
  • plural holes 270a are formed in a portion of the trimmed basic metal material except the portion of the bottom inserted forwardly.
  • the trimming step and the piercing step are performed at the same time.
  • a predetermined number of fastening holes are formed in the portion of the bottom inserted forwardly.
  • the diameter of the hole formed in the other portion except the inserted portion is 3mm.
  • the internal diameter of the drum back 270 molded through the above process is 500 ⁇ 600mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (15)

  1. Machine à laver du type à tambour ayant
    - un moteur (40),
    - une cuve (100) prévue de façon inclinée sous un angle prédéterminé contre un fond de la machine à laver du type à tambour,
    - un tambour (20, 200) monté à l'intérieur de la cuve (100) est prévu de façon inclinée sous un angle prédéterminé correspondant, le tambour (20, 200) ayant un centre de tambour (28) de forme cylindrique et un dos de tambour (270) connecté à une ouverture formée dans un côté du centre de tambour (28) pour définir une surface arrière du tambour (20, 200),
    - un connecteur monté dans la surface arrière du tambour (20, 200), et
    - un arbre rotatif (50, 500) connecté au connecteur pour transmettre la force de rotation du moteur (20) au tambour (20, 200),
    - dans laquelle le dos de tambour (270) est formé sous la conformation d'une cuvette ayant une partie d'expansion de tambour (26) en expansion vers un côté extérieur du tambour (20, 200) depuis l'ouverture du centre de tambour (28, 280), et une portion du dos de tambour (270) où le connecteur est monté est évidée vers l'intérieur du tambour (20, 200) pour réduire la distance entre le centre de tambour (28, 280) et le connecteur ; et
    - un moyen de levage (23, 230) prévu à l'intérieur du tambour (20, 200), dans laquelle le moyen de levage (23, 230) a une forme triangulaire qui devient plus large depuis une portion avant vers une portion arrière et est prévu à l'intérieur du tambour (20, 200), et le moyen de levage (23, 230) comprend en outre :
    une partie d'installation de billes (230a) formée le long d'une portion centrale du moyen de levage (23, 230) dans une direction avant/arrière, la partie d'installation de billes (230a) étant formée en projection depuis la surface inférieure du moyen de levage (23, 230) pour rendre la largeur de celle-ci plus étroite que la surface inférieure du moyen de levage (23, 230) ;
    une bille (231) montée en rotation sur la partie d'installation de billes (230a) ; et
    un trou traversant pour eau de lavage (230c) formé sur la partie d'installation de billes (230a) ;
    caractérisé en ce que le moyen de levage (23, 230) comprend en outre une surface oblique (230b) en forme de S formée dans l'arrière des côtés opposés de la partie d'installation de billes (230a), la surface oblique (230b) étant connectée à une surface supérieure de la partie d'installation de billes (230a) depuis la surface inférieure du moyen de levage (23, 230).
  2. Machine à laver du type à tambour selon la revendication 1, dans laquelle un diamètre interne du centre de tambour (28) est le même qu'un diamètre interne d'une circonférence du dos de tambour (270) connecté à l'ouverture formée dans un côté du tambour (20, 200).
  3. Machine à laver du type à tambour selon la revendication 2, dans laquelle la circonférence du dos de tambour (270) a une partie linéaire avec une longueur prédéterminée, qui est parallèle à l'arbre central du tambour (20, 200).
  4. Machine à laver du type à tambour selon les revendications 2 et 3, dans laquelle la circonférence du dos de tambour (270) et la surface arrière du dos de tambour (270) sont formées sous une forme ronde.
  5. Machine à laver du type à tambour selon la revendication 1, dans laquelle le connecteur est une sorte d'araignée (300) ayant une pluralité de parties en forme de bras dans une direction radiale.
  6. Machine à laver du type à tambour selon la revendication 4, dans laquelle la cuve (10, 100) a une partie d'expansion de cuve (19) ayant un arbre rotatif (50) traversant une surface arrière de celle-ci, et a une partie de la surface arrière en expansion vers l'arrière.
  7. Machine à laver du type à tambour selon la revendication 6, dans laquelle le moteur (40) est monté dans la surface arrière de la cuve (10, 100) pour être connecté à l'arbre rotatif (50), et une portion de la surface arrière de la cuve (10, 100) à laquelle le moteur (40) n'est pas monté est en expansion vers l'arrière de façon suffisante pour former la partie d'expansion de cuve (19).
  8. Machine à laver du type à tambour selon la revendication 4, dans laquelle le tambour (20, 200) est réalisé en acier inoxydable, et l'épaisseur du matériau de la partie frontale du tambour (29) et du centre de tambour (28) est de 0,5 mm, et l'épaisseur du matériau du dos de tambour (270) est de 1 mm.
  9. Machine à laver du type à tambour selon la revendication 8, dans laquelle le rapport (d/D) de la profondeur (d) du dos de tambour (270) sur le diamètre (D) du tambour est de 0,08 ∼ 0,2.
  10. Machine à laver du type à tambour selon la revendication 8, dans laquelle le rapport de la profondeur (d) du dos de tambour (270) sur la longueur (L2) du centre de tambour (280) est de 0,18 ∼ 0,36.
  11. Machine à laver du type à tambour selon la revendication 8, dans laquelle le rapport de la longueur (L1) de la partie frontale (290) du tambour sur la longueur (L2) du centre de tambour (280) sur la profondeur (d) du dos de tambour (270), L1:L2:d, est 1:8,3:1,5 ∼ 1:9,7:2,7.
  12. Machine à laver du type à tambour selon la revendication 8, dans laquelle le diamètre interne du centre de tambour (28) est formé à l'intérieur de la plage de 500 à 600 mm.
  13. Machine à laver du type à tambour selon la revendication 4, comprenant en outre :
    une carrosserie (2, 20) pour former un extérieur de celle-ci ; et
    un couvercle arrière (600) pour refermer un accès à un côté arrière du tambour (20, 200) depuis une surface arrière de la carrosserie (2, 20), le couvercle arrière (600) ayant une partie en projection qui se projette vers l'arrière dans une portion supérieure de celui-ci.
  14. Machine à laver du type à tambour selon la revendication 4, dans laquelle le tambour (20, 200) comprend en outre : une partie frontale de tambour (29) connectée au centre de tambour (28) pour former l'ouverture du tambour (20, 200) et la partie frontale de tambour (29) comprend :
    une partie frontale à diamètre interne minimum,
    une partie arrière à diamètre interne maximum, et
    une partie oblique pour connecter la partie frontale à diamètre interne minimum et la partie arrière à diamètre interne maximum.
  15. Machine à laver du type à tambour selon la revendication 15, dans laquelle une partie de tambour en expansion frontale (290a) en expansion vers l'avant est formée dans la partie oblique.
EP06768571.9A 2005-05-23 2006-05-22 Lave-linge de type a tambour Not-in-force EP1883726B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR20050043180 2005-05-23
KR1020050092364A KR101275198B1 (ko) 2005-05-23 2005-09-30 드럼세탁기 및 그에 적용되는 드럼 제조방법
PCT/KR2006/001917 WO2006126814A2 (fr) 2005-05-23 2006-05-22 Lave-linge de type a tambour et methode de fabrication du tambour correspondant

Publications (3)

Publication Number Publication Date
EP1883726A2 EP1883726A2 (fr) 2008-02-06
EP1883726A4 EP1883726A4 (fr) 2014-06-18
EP1883726B1 true EP1883726B1 (fr) 2016-12-28

Family

ID=37452462

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06768571.9A Not-in-force EP1883726B1 (fr) 2005-05-23 2006-05-22 Lave-linge de type a tambour

Country Status (3)

Country Link
EP (1) EP1883726B1 (fr)
AU (1) AU2006250175B2 (fr)
WO (1) WO2006126814A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2162578A1 (fr) * 2007-06-29 2010-03-17 Basf Se Ensemble de panier pour machine à laver
JP4603063B2 (ja) * 2008-07-04 2010-12-22 パナソニック株式会社 ドラム式洗濯乾燥機
JP4603064B2 (ja) * 2008-07-04 2010-12-22 パナソニック株式会社 ドラム式洗濯乾燥機
US9080279B2 (en) 2011-10-24 2015-07-14 Lg Electronics Inc. Washing machine to produce three-dimensional motion
KR101951423B1 (ko) 2012-10-09 2019-04-25 엘지전자 주식회사 듀얼드럼 세탁기의 서브드럼 구조 및 이를 이용한 서브드럼 결합방법
JP2021534910A (ja) * 2018-08-30 2021-12-16 エルジー エレクトロニクス インコーポレイティドLg Electronics Inc. 洗濯機

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Publication number Priority date Publication date Assignee Title
GB1388731A (en) * 1971-05-28 1975-03-26 Zanussi A Spa Industrie Drum for a washing machine or dryer
US5746070A (en) * 1996-06-07 1998-05-05 White Consolidated Industries, Inc. Plastic and stainless steel horizontal axis spin tub
JP3772821B2 (ja) * 2001-10-23 2006-05-10 エルジー電子株式会社 洗濯機
KR100445655B1 (ko) * 2002-01-09 2004-08-21 엘지전자 주식회사 드럼 세탁기의 드럼 구조
ES2289521T3 (es) * 2003-06-05 2008-02-01 Lg Electronics Inc. Tambor para lavadora y secadora.
AU2004203022B2 (en) * 2003-07-08 2010-01-28 Lg Electronics Inc. Drum-type washing machine
AU2004203379B2 (en) * 2003-07-28 2006-10-12 Lg Electronics Inc. Washing machine
KR101054408B1 (ko) * 2004-04-19 2011-08-05 엘지전자 주식회사 세탁기

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Title
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Also Published As

Publication number Publication date
AU2006250175B2 (en) 2009-10-29
EP1883726A4 (fr) 2014-06-18
EP1883726A2 (fr) 2008-02-06
WO2006126814A3 (fr) 2007-02-22
AU2006250175A1 (en) 2006-11-30
WO2006126814A2 (fr) 2006-11-30

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