EP2573249A2 - Machine à laver à tambour - Google Patents

Machine à laver à tambour Download PDF

Info

Publication number
EP2573249A2
EP2573249A2 EP12007910A EP12007910A EP2573249A2 EP 2573249 A2 EP2573249 A2 EP 2573249A2 EP 12007910 A EP12007910 A EP 12007910A EP 12007910 A EP12007910 A EP 12007910A EP 2573249 A2 EP2573249 A2 EP 2573249A2
Authority
EP
European Patent Office
Prior art keywords
drum
tub
washing machine
type washing
drum type
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.)
Granted
Application number
EP12007910A
Other languages
German (de)
English (en)
Other versions
EP2573249A3 (fr
EP2573249B1 (fr
Inventor
Si Moon Jeon
Hee Tae Lim
Jae Won Chang
Kyeong Hwan Kim
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
Publication of EP2573249A2 publication Critical patent/EP2573249A2/fr
Publication of EP2573249A3 publication Critical patent/EP2573249A3/fr
Application granted granted Critical
Publication of EP2573249B1 publication Critical patent/EP2573249B1/fr
Active 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
    • D06F37/20—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
    • D06F37/225—Damping vibrations by displacing, supplying or ejecting a material, e.g. liquid, into or from counterbalancing pockets

Definitions

  • the present invention relates to a drum type washing machine according to the preamble of claim 1.
  • FIG. 1 is a sectional view illustrating the interior structure of a conventional drum type washing machine.
  • the conventional drum type washing machine comprises: a cabinet assembly 110 having a base 101 and a door 102; a tub 120 mounted in the cabinet assembly 110; a drum 130 rotatably disposed inside the tub 120; a motor 140 for rotating the drum 130; a spring 150 and a damper 160 for attenuating vibration transmitted to the cabinet assembly 110 from the tub 120; and a balancer 170 for attenuating vibration generated at the drum 130.
  • the drum 130 has a plurality of holes 104, through which wash water is introduced into the drum 130 from the tub 120. To the inner circumferential surface of the drum 130 are attached lifts 103. As the drum 130 is rotated, laundry m is lifted in the drum 130 by the lifts 103, which are rotated along with the drum 130.
  • the tub 120 is spaced a predetermined distance from the inside surface of the cabinet assembly 110.
  • the upper end of the tub 120 is connected to the cabinet assembly 110 via the spring 150, and the lower end of the tub 120 is connected to the base 101 via the damper 160.
  • the damper 160 is hingedly attached to the base 101.
  • the spring 150 and the damper 160 serve to attenuate vibration transmitted to the cabinet assembly 110 from the tub 120.
  • the door 120 of the cabinet assembly 110 is pivotably connected to a front surface 105 of the cabinet assembly 110.
  • a front surface 125 of the tub 120 is formed an opening 126.
  • a front surface 135 of the drum 130 is formed another opening 136.
  • the opening 126 of the tub 120 communicates with a hole 106, which is opened and closed by the door 102. Also, the opening 136 of the drum 130 communicates with the hole 106.
  • a gasket 180 for preventing leakage of wash water.
  • the gasket 180 serves to seal a space defined by the inside surface of the cabinet assembly 110 and the front surface 125 of the tub 120.
  • the motor 140 is mounted at the rear of the tub 120 for rotating the drum 130, which is disposed inside the tub 120.
  • the balancer 170 which has predetermined weight, is mounted at the drum 130 for maintaining balance of the drum 130 while the drum 130 is rotated.
  • the balancer 170 provides a centrifugal force to the drum 130, which is rotated at high speed when a dewatering process is performed, to prevent the drum 130 from being vibrated.
  • the balancer 170 is a ball balancer mounted at the front end of the drum 130.
  • the balancer 170 comprises: a housing 172 fixed to the drum 130; and balls 174 movably disposed in the housing 172.
  • the balancer 170 serves to compensate for eccentricity of the drum 130 generated due to the laundry m when the drum 130 is rotated while the laundry m is gathered at one side of the drum 130.
  • the balls 174 move to the other side of the drum 130, which is opposite to the side of the drum where the laundry m is gathered.
  • the present invention has been made in view of the above problems, and it is an object of the present invention to provide a drum type washing machine that is capable of effectively intercepting vibrations from the drum to the tub when the drum is rotated. This object is achieved by the characterizing portion of claim 1.
  • a drum for drum type washing machines comprising: a hollow drum body; a drum front mounted in the front of the drum body, the drum front having an opening; a drum back mounted at the rear of the drum body; a hub fixed to the rear surface of the drum back; and front and rear balancers mounted in the front and the rear of the drum body, respectively, for complementarily eliminating an eccentric force generated at the drum body when the drum body is rotated.
  • the front balancer is attached to the drum front, and the rear balancer is attached to the drum back.
  • the rear balancer may be attached to the hub or mounted at the outer circumference of the hub.
  • At least one of the front and rear balancers is a liquid balancer.
  • a drum type washing machine comprising: a rotatable hollow drum; and front and rear balancers mounted in the front and the rear of the drum, respectively, for providing a centrifugal force to the drum to complementarily balance an eccentric force generated at the drum.
  • the drum comprises: a drum body; a drum front mounted in the front of the drum body, the drum front having an opening; and a drum back mounted in the rear of the drum body, and the front balancer is attached to the drum front, and the rear balancer is attached to the drum back.
  • At least one of the front and rear balancers is a liquid balancer.
  • a drum type washing machine comprising: a cabinet assembly forming the outer appearance of the drum type washing machine; a tub mounted in the cabinet assembly in a supported fashion; and a drum rotatably disposed inside the tub, wherein the drum comprises: a hollow drum body; a drum front mounted in the front of the drum body, the drum front having an opening; and a drum back mounted in the rear of the drum body; and front and rear balancers mounted in the front and the rear of the drum body, respectively, for complementarily eliminating an eccentric force generated at the drum body when the drum body is rotated.
  • the front balancer is attached to the drum front, and the rear balancer is attached to the drum back.
  • the front and rear balancers are mounted at the front and rear sides of the drum, respectively, and therefore, the eccentric force generated by the laundry is complementarily eliminated by the front and rear balancers even when the laundry is eccentrically placed at one side of the drum.
  • drum type washing machines according to numerous preferred embodiments of the present invention may be proposed, although only the most preferred embodiment of the present invention will be hereinafter described. Also, the basic structure of the drum type washing machine according to the present invention is identical to that of the above-described conventional drum type washing machine, and therefore, a detailed description thereof will not be given.
  • FIG. 2 is a sectional view illustrating the interior structure of a drum type washing machine according to a first preferred embodiment of the present invention
  • FIG. 3 is an exploded perspective view illustrating a vibratory body according to a first preferred embodiment of the present invention
  • FIG. 4 is an exploded perspective view illustrating a drum according to a first preferred embodiment of the present invention
  • FIG. 5 is a perspective view, in section, illustrating the drum according to the first preferred embodiment of the present invention.
  • the drum type washing machine comprises: a cabinet assembly 10 forming the outer appearance of the drum type washing machine; a tub 20 mounted in the cabinet assembly 10 in a supported fashion; a drum 30 rotatably disposed inside the tub 20; a motor 40 mounted at the rear surface of the tub 20 for rotating the drum 30; a rear surface gasket 50 for sealing the interior of the tub 20 and intercepting vibration transmitted to the tub 20 from the drum 30; and a suspension 60 connected to the rear of the tub 20 for attenuating vibration or impact transmitted to the cabinet assembly 10 from the tub 20.
  • the cabinet assembly 10 comprises: a cabinet body 18 forming two side surfaces and a rear surface of the drum type washing machine; a cabinet cover 11 mounted in front of the cabinet body 11; a top cover 14 mounted on the cabinet body 18; and a base 16 mounted under the cabinet body 18.
  • a hole 19 which is opened and closed by a door, which is pivotably connected to the cabinet cover 11.
  • the suspension 60 is disposed between the base 16 and the tub 20.
  • the tub 20 comprises: a tub body 22 disposed inside the cabinet cover 11, the tub body 22 being fixed to the inside surface of the cabinet cover 11 such that the tub body 22 communicates with the hole 19; a tub cover 24 attached to the rear surface of the tub body 22, the tub cover 24 having an opening 23 formed in the inner center part thereof; a tub bracket 26 for closing the opening 23 of the tub cover 24; and a bearing housing 28 mounted at the rear surface of the tub bracket 26 for supporting a motor shaft 42 of the motor 40.
  • An opening 21 of the tub body 22 is aligned with the hole 19 of the cabinet cover 11 such that the tub body 22 is aligned with the hole 19 of the cabinet cover 11, and then the tub body 22 is fixed to the cabinet cover 11 by means of screws 25.
  • the tub cover 24 is attached to the rear surface of the tub body 22 by means of screws 25a, which are inserted though fixing holes 22a and 24a formed at the outer circumferences of the tub body 22 and the tub cover 24, respectively.
  • the opening 23 of the tub cover 24 is sealed by the tub bracket 26 and the rear surface gasket 50.
  • the bearing housing 28 is mounted to the rear surface of the tub bracket 26 by means of the screws 25a.
  • the bearing housing 28 has bearings 29, by which the motor shaft 42 is smoothly rotated. That is, the motor shaft 42 is rotated while being supported by the bearing 29.
  • Unexplained reference numeral 22b indicates a fixing member for fixing the tub body 22.
  • the fixing member 22b is fixedly attached to the inside surface of the cabinet body 18.
  • the rear surface gasket 50 serves to prevent wash water from flowing out of the tub 20.
  • the rear surface gasket 50 serves to absorb vibration or impact transmitted to the tub body 22 from the tub bracket 26 when a washing or dewatering process is performed.
  • the rear surface gasket 50 is made of a resilient material that can be expanded and contracted. Specifically, the rear surface gasket 50 is disposed along the outer circumference of the tub bracket 26 to seal the opening 23.
  • the motor 40 is mounted at the rear of the bearing housing 28.
  • the motor shaft 42 of the motor 40 is securely fixed to the rear surface of the drum 30 through the bearing housing 28 and the tub bracket 26.
  • the drum 30 is rotated by the motor shaft 42.
  • To the drum 30 are mounted front and rear liquid balancers 80 and 85 for eliminating vibration generated at the drum 30 when the dewatering process is performed.
  • the suspension 60 is disposed between the tub 20 and the base 16.
  • damper brackets 61 and 62 are mounted at the bearing housing 28 and the base 16, respectively, and a damper 70 is disposed between the damper brackets 61 and 62.
  • the damper 70 may be vertically mounted to attenuate vertical vibration or impact as shown in FIG. 3 , or inclined to attenuate horizontal component force or inclined vibration or impact as shown in FIG. 2 .
  • the drum 30 comprises: a cylindrical drum body 32; a drum front 34 mounted in the front of the drum body 32; a drum back 36 mounted at the rear of the drum body 32; a hub 38 fixed to the rear surface of the drum back 36; and front and rear balancers 80 and 85 mounted at the front surface of the drum front 34 and the rear surface of the drum back 36, respectively.
  • the drum body 32 is formed in the shape of a cylinder, front and rear ends of which are opened.
  • the cylindrical drum body 32 has a plurality of through-holes 32b, through which wash water is introduced into or discharged from the drum body 32.
  • lifts 31 At the inner circumferential surface of the drum body 32 are attached lifts 31.
  • the drum front 34 is formed in the shape of ring.
  • the drum front 34 is attached to the drum body 32 by means of bolts (not shown).
  • the drum front 34 has an opening 34a formed in the inner center part thereof, through which laundry is put into the drum body 32.
  • the drum front 34 has a location surface 34b, to which the front balancer 80 is securely fixed.
  • the drum back 36 is attached to the rear surface of the drum body 32 by means of bolts 35a.
  • the hub 38 is attached to the rear surface of the drum back 36 by means of bolts 35a.
  • the drum back 36 is provided with a plurality of through-holes 36b having the same function as the through-holes 32b of the drum body 32.
  • the hub 38 is separately manufactured, and is then attached to the rear surface of the drum back 36.
  • the hub 38 may be integrally formed with the drum back 36.
  • the outer diameter of the hub 38 is slightly less than that of the drum body 32 and the drum back 36, and the thickness of the hub 38 is equal to or slightly less than that of the rear balancer 85.
  • the hub 38 is attached to the rear surface of the drum back 36 by means of the bolts 35a.
  • the motor shaft 42 is fixedly fitted in the center part of the hub 38.
  • fixing holes 38a are formed at the edge of the hub 38, through which the bolts 35a are inserted such that the hub 39 is attached to the rear surface of the drum back 36.
  • the rear balancer 85 is mounted at the outer circumference of the hub 38, and is attached to the hub 38 by means of the bolts 35a.
  • the outer diameter of the rear balancer 85 is equal to that of the drum body 32.
  • the rear balancer 85 may be directly fixed to the drum back 36, not to the hub 38.
  • Each of the front and rear balancers 80 and 85 is a liquid balancer having fluid contained therein.
  • Each of the front and rear balancers 80 and 85 comprises: a ring-shaped housing 52 having an opening 82a defined at the center thereof; and fluid 84 contained in the housing 82.
  • the housing 82 is formed in a sealed fashion such that the fluid 84 cannot flow out of the housing 82.
  • the housing 82 has a hollow part 82b, in which partitions 82s are disposed.
  • the partitions 82 are disposed in the housing 82 such that the fluid can flow in the hollow part 82b. That is, the hollow part 82b is not partitioned by the partitions 82c. To this end, one end of each partition 82c is spaced a predetermined distance from the inner wall of the housing 82.
  • the fluid is salt water, although various kinds of fluid may be used according to circumstances.
  • FIG. 6 is an exploded perspective view illustrating a drum according to a second preferred embodiment of the present invention.
  • the drum according to the second preferred embodiment of the present invention is identical in structure to the drum according to the first preferred embodiment of the present invention except that the hub 39 has a diameter equal to that of the drum body 32, the hub 39 is mounted at the rear of the drum body 32, and the rear balancer 85 is attached to the outside surface of the hub 39.
  • Laundry 90 and 95 is put into the drum 30, and the drum 30 is rotated by the motor 40.
  • the drum 30 is rotated while being supported by the motor shaft 42.
  • the laundry 90 and 95 is placed at the lower part of the drum 30, an eccentric force due to the laundry 90 and 95 is generated at the drum 30.
  • the eccentric force is complementarily eliminated by the front and rear balancers 80 and 85 mounted in the front and the rear of the drum 30, respectively, according to the positions where the laundry 90 and 95 is placed, which will be described hereinafter in more detail.
  • the eccentric force generated by the laundry 90 is applied not only to the front balancer 80 but also to the rear balancer 85.
  • Most of the eccentric force generated by the laundry 90 is eliminated by the front balancer 80, which is disposed adjacent to the laundry 90, and only a portion of the eccentric force generated by the laundry 90 is eliminated by the rear balancer 95 disposed at the rear side of the drum 30.
  • the fluid 84 contained in the front balancer 80 moves toward the direction opposite to the laundry 90, i.e., toward the upper part of the drum 30 in the drawing, to eliminate the eccentric force generated by the laundry 90. Consequently, the drum is rotated while the fluid 84 is opposite to the laundry 90, and therefore, the eccentric force generated by the laundry 90 is effectively eliminated.
  • the fluid 84 contained in the rear balancer 85 moves toward the direction opposite to the laundry 90, i.e., toward the upper part of the drum 30 in the drawing, to eliminate the eccentric force generated by the laundry 90.
  • the laundry 90 is spaced a relatively great distance from the rear side of the drum 30. For this reason, a relatively small amount of the eccentric force is applied to the rear side of the drum 30. Consequently, the fluid 84 contained in the rear balancer 85 is not concentrated toward the direction opposite to the laundry 90, and therefore, only a relatively small amount of the eccentric force generated by the laundry 90 is eliminated by the rear balancer 85.
  • the front and rear balancers 80 and 85 mounted in the front and at the rear of the drum 80 complementarily perform the balancing operation on the laundry 90 such that a relatively large amount of the eccentric force generated by the laundry 90 is eliminated by the front balancer 80, which is disposed adjacent to the laundry 90, and a relatively small amount of the eccentric force generated by the laundry 90 is eliminated by the rear balancer 85, which is disposed away from the laundry 90.
  • the front and rear balancers 80 and 85 mounted to the drum 30 complementarily eliminates the eccentric force generated by the laundry 90 and 95 wherever the laundry 90 and 95 is placed.
  • the drum type washing machine according to the present invention has the following effects.
  • the front and rear balancers are mounted at the front and rear sides of the drum, respectively, and therefore, the eccentric force generated by the laundry is complementarily eliminated by the front and rear balancers even when the laundry is eccentrically placed at one side of the drum.
  • the eccentric force generated by the laundry eccentrically placed in the drum is effectively eliminated by the front and rear balancers. Consequently, the present invention has the effect of reducing vibration generated when the drum is rotated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
EP12007910.8A 2004-06-09 2005-06-06 Machine à laver à tambour Active EP2573249B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020040042160A KR100587307B1 (ko) 2004-06-09 2004-06-09 드럼세탁기 및 드럼세탁기의 드럼
EP05012161.5A EP1605088B1 (fr) 2004-06-09 2005-06-06 Machine à laver à tambour et tambour correspondant

Related Parent Applications (3)

Application Number Title Priority Date Filing Date
EP05012161.5 Division 2005-06-06
EP05012161.5A Division EP1605088B1 (fr) 2004-06-09 2005-06-06 Machine à laver à tambour et tambour correspondant
EP05012161.5A Division-Into EP1605088B1 (fr) 2004-06-09 2005-06-06 Machine à laver à tambour et tambour correspondant

Publications (3)

Publication Number Publication Date
EP2573249A2 true EP2573249A2 (fr) 2013-03-27
EP2573249A3 EP2573249A3 (fr) 2015-04-29
EP2573249B1 EP2573249B1 (fr) 2019-10-02

Family

ID=34937258

Family Applications (2)

Application Number Title Priority Date Filing Date
EP12007910.8A Active EP2573249B1 (fr) 2004-06-09 2005-06-06 Machine à laver à tambour
EP05012161.5A Active EP1605088B1 (fr) 2004-06-09 2005-06-06 Machine à laver à tambour et tambour correspondant

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP05012161.5A Active EP1605088B1 (fr) 2004-06-09 2005-06-06 Machine à laver à tambour et tambour correspondant

Country Status (5)

Country Link
US (1) US20050274159A1 (fr)
EP (2) EP2573249B1 (fr)
JP (1) JP5005891B2 (fr)
KR (1) KR100587307B1 (fr)
CN (1) CN100570041C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112695495A (zh) * 2020-12-22 2021-04-23 珠海格力电器股份有限公司 减振装置及洗衣机

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KR100587307B1 (ko) 2006-06-08
CN100570041C (zh) 2009-12-16
EP1605088A2 (fr) 2005-12-14
EP2573249A3 (fr) 2015-04-29
EP1605088A3 (fr) 2007-06-27
JP5005891B2 (ja) 2012-08-22
EP2573249B1 (fr) 2019-10-02
KR20050117004A (ko) 2005-12-14
EP1605088B1 (fr) 2015-04-15
JP2005349208A (ja) 2005-12-22
US20050274159A1 (en) 2005-12-15
CN1707010A (zh) 2005-12-14

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