WO2012128567A2 - Machine à laver dotée d'une cuve rotative bidirectionnelle - Google Patents

Machine à laver dotée d'une cuve rotative bidirectionnelle Download PDF

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Publication number
WO2012128567A2
WO2012128567A2 PCT/KR2012/002071 KR2012002071W WO2012128567A2 WO 2012128567 A2 WO2012128567 A2 WO 2012128567A2 KR 2012002071 W KR2012002071 W KR 2012002071W WO 2012128567 A2 WO2012128567 A2 WO 2012128567A2
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WO
WIPO (PCT)
Prior art keywords
clutch
gear
rotation shaft
washing machine
combined
Prior art date
Application number
PCT/KR2012/002071
Other languages
English (en)
Other versions
WO2012128567A3 (fr
Inventor
Kyubum Lee
Youngjong Kim
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 KR1020110026586A external-priority patent/KR101807498B1/ko
Priority claimed from KR1020110048687A external-priority patent/KR101740361B1/ko
Application filed by Lg Electronics Inc. filed Critical Lg Electronics Inc.
Publication of WO2012128567A2 publication Critical patent/WO2012128567A2/fr
Publication of WO2012128567A3 publication Critical patent/WO2012128567A3/fr

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    • 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 
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30—Driving arrangements 
    • D06F37/40—Driving arrangements  for driving the receptacle and an agitator or impeller, e.g. alternatively

Definitions

  • the present disclosure relates to a washing machine having a bi-directionally rotatable tub, and more particularly, to a washing machine for selectively rotating a tub in the same or opposite direction to a pulsator provided in the tub.
  • washing machine is a device for performing washing by forcibly forming a water flow of the washing water in the tub to promote the chemical action of detergent as well as applying physical action, such as friction or shock, to the laundry so as to enhance the washing effect.
  • Such a washing machine rotates a pulsator provided at a bottom surface of the tub in a forward or reverse direction to form a water flow for washing. Accordingly, the washing machine requires a dehydration shaft for rotating a tub and a washing shaft for driving a pulsator.
  • the washing machine may include a clutch for selectively driving the two drive shafts (washing shaft and dehydration shaft). As a result, the clutch selectively transfers a rotational force generated from the drive motor to the pulsator during the washing operation, and to both the pulsator and tub during the dehydration operation.
  • FIG. 1 is a view schematically illustrating the configuration of a typical washing machine.
  • a washing machine 10 may include a body 8 forming an external appearance thereof, and an outer tub 1 is provided at an inner portion of the body.
  • a tub 2 rotated by a drive motor 7 is provided at an inner portion of the outer tub 1.
  • a pulsator 3 for laundry is provided at a bottom surface of the tub, which is rotated by the drive motor 7.
  • the drive motor 7 forming a rotational force for the rotation of the tub and pulsator is provided at a lower portion of the outer tub 1, wherein the tub receives a rotational force of the drive motor by a dehydration shaft 5, and the pulsator 3 receives a rotational force of the drive motor by a washing shaft 6.
  • the dehydration shaft and washing shaft are rotatably supported by a bearing housing 4.
  • a clutch may be provided to selectively rotate the dehydration shaft in such a manner.
  • the clutch is tooth-combined with the dehydration shaft to move upward or downward, and provided with a tooth surface that can be tooth-combined with a rotor of the drive motor. Accordingly, the clutch releases a coupling between the dehydration shaft and rotor during the upward movement, and the clutch is tooth-combined with the rotor to transfer a rotational force of the rotor during the downward movement.
  • a washing machine having a clutch having the foregoing structure has a problem that the rotational direction of the dehydration shaft is always the same as the rotational direction of the washing shaft, but the dehydration shaft cannot be rotated in a reverse direction with respect to that of the washing shaft.
  • the present disclosure is contrived to overcome the disadvantages of the related art, and a technical task of the present disclosure is to provide a washing machine having a tub that can be selectively rotated in the same or reverse direction to the rotation direction of a pulsator.
  • a washing machine may include a water tank; a tub rotatably provided at an inner portion of the water tank; a pulsator rotatably provided within the tub; a first rotation shaft combined with the tub to be rotated together therewith; a second rotation shaft combined with the pulsator to be rotated together therewith, and provided at an inner portion of the first rotation shaft; a drive motor configured to transfer a rotational force to the second rotation shaft; a clutch means configured to move on the first rotation shaft and engaged with the first rotation shaft to be rotated together therewith; a first gear rotated in the same direction as that of the second rotation shaft by the drive motor; a second gear disposed to face the first gear to be rotated in the reverse direction to that of the first gear; and a clutch driving means configured to move the clutch to be engaged with the first gear or second gear or located between both the gears.
  • the direction of the transferred rotational force may vary based on the location of the clutch on the first rotation shaft when transferring power to the first rotation shaft for rotating the tub.
  • the clutch may be selectively engaged with the first and the second gear that receive power by the drive motor to be rotated in opposite directions to each other, and thus the first rotation shaft, namely, tub, may be rotated in a forward or reverse direction, but only the second rotation shaft may be rotated in a state that the clutch is separated from both the gears.
  • the tub may be controlled to be rotated in the same or reverse direction to that of the pulsator, or maintain a stopped state with no rotation.
  • the washing machine may further include a third gear provided to be engaged with the first and the second gear, respectively, to transfer a rotational force of the first gear to the second gear.
  • the third gear may be engaged with both the first gear and second gear to perform a role of driving the second gear in the reverse direction to that of the first gear.
  • a pair of third gears may be provided therein, and the first through third gears may be bevel gears.
  • a pair of third gears may be provided therein, and two third gears may be formed to face each other.
  • the drive motor may include a stator and a rotor rotated by the stator, and the first gear may be fixed to the rotor.
  • first and the second gear and the first and the second shaft may be concentrically disposed with each other.
  • the washing machine may further include a shaft fixing portion combined with the rotor and to an inner side of which the second rotation shaft is fixed.
  • the second rotation shaft may be directly combined with the rotor.
  • the washing machine may be a top-load type washing machine formed with a laundry loading port at an upper portion thereof or a front-load type washing machine formed with a laundry loading port at a front surface of the washing machine.
  • a washing machine including a tub into which the laundry is loaded; a water flow generation means rotatably provided within the tub; a first and a second rotation shaft combined with the tub and water flow generation means, respectively, and concentrically disposed with each other; a drive motor configured to rotationally drive the second rotation shaft; a first electro-motive means rotated in the same direction as that of the drive motor and a second electro-motive means rotated in the reverse direction to that of the drive motor; a clutch configured to selectively transfer either one rotational force of the first and the second electro-motive means to the first rotation shaft, and provided to move along the first rotation shaft; and a clutch driving means configured to move the clutch to be engaged with the first and the second electro-motive means or not engaged with both the electro-motive means.
  • a washing machine including a water tank; a tub combined with a first rotation shaft to be rotatably provided at an inner portion of the water tank; a pulsator combined with a second rotation shaft to be rotatably provided within the tub; a drive motor configured to rotate the second rotation shaft; a first clutch configured to move along the first rotation shaft, and combined with the first rotation shaft to be rotated together with the first rotation shaft; a second clutch configured to move along the second rotation shaft, and combined with the second rotation shaft to be rotated together with the second rotation shaft; a first gear selectively combined with the second rotation shaft; a second gear configured to rotate in the reverse direction to that of the first gear, and selectively combined with the first clutch; and a clutch driving means configured to move the first clutch, wherein the second clutch is engaged with the first gear when the first clutch is engaged with the second gear, and the second clutch is moved by the first clutch to be separated from the first gear and the first clutch is concurrently combined with the first and the
  • the first and the second rotation shaft may be rotated in the same or reverse direction with respect to each other by allowing the second clutch to be separated from or combined with the first gear while the first clutch moves along the rotation shaft.
  • the first and the second rotation shaft may be connected to each other by the first clutch, and thus the first gear and the second gear are separated from each other not to be rotated, thereby reducing noise generated by the rotation of the first and the second gear.
  • the first and the second rotation shaft may not be allowed to be connected to each other while the second clutch is separated from the first gear.
  • the second clutch may be moved by the first clutch to be separated from the first gear, and the first clutch may be combined only with the first rotation shaft.
  • the washing machine may further include a third gear provided to be engaged with the first and the second gear, respectively, to transfer a rotational force of the first gear to the second gear.
  • a pair of third gears may be provided therein, and the first through third gears may be configured with bevel gears.
  • a pressing portion for pressing the second clutch in the downward direction along the second rotation shaft may be formed at a bottom surface of the first clutch, wherein the pressing portion has a sleeve shape.
  • an inner circumferential surface of the first clutch and an outer circumferential surface of the first and the second rotation shaft may be gear-combined with each other to transfer a rotational force of the first rotation shaft to the second rotation shaft.
  • an outer circumferential portion of the second rotation shaft and an inner circumferential surface of the first clutch may be gear-combined with each other.
  • an upper outer circumferential surface of the first clutch and an inner circumferential surface of the second gear may be gear-combined with each other.
  • an inner circumferential surface of the first gear ad an outer circumferential surface of the second clutch may be gear-combined with each other.
  • washing tub and pulsator can be rotated opposite directions to each other to create a stronger water flow, thereby enhancing washing capability or reducing washing time.
  • the rotation direction of the pulsator and washing tub can be determined by using one drive motor, thereby providing an effect of simplifying the power transmission structure.
  • FIG. 1 is an internal structural view schematically illustrating an internal structure of a washing machine having a typical pulsator in the related art
  • FIG. 2 is a perspective view illustrating a washing tub and a drive motor in a washing machine according to a first embodiment of the present disclosure
  • FIG. 3 is a partial cross-sectional view illustrating a connection structure between a pulsator and a drive motor in the first embodiment
  • FIG. 4 is an exploded perspective view illustrating a drive unit of the washing tub in the first embodiment
  • FIG. 5 is a front view illustrating the location of a clutch when the washing tub and pulsator are rotated in opposite directions to each other;
  • FIG. 6 is a front view illustrating the location of a clutch when the washing tub and pulsator are rotated in the same direction;
  • FIG. 7 is a cross-sectional view illustrating a power transmission device in a washing machine according to a second embodiment of the present disclosure
  • FIG. 8 is an exploded perspective view illustrating each constituent element constituting the power transmission device
  • FIG. 9 is a cross-sectional view illustrating a power transmission device when the tub and pulsator are rotated in opposite directions to each other.
  • FIG. 10 is a cross-sectional view illustrating a power transmission device when the tub and pulsator are rotated in the same direction.
  • FIGS. 11 and 12 are schematic views schematically illustrating FIGS. 9 and 10, respectively.
  • the first embodiment 100 relates to a so-called "top-load” type washing machine having a laundry loading port for loading laundry, located at an upper portion of the washing machine body, and a cabinet provided with the laundry loading port and door is provided therein, but the illustration of the cabinet is omitted to help the understanding of the setup.
  • the embodiment may not be necessarily applicable only to a top-load type washing machine, but also may be applicable to a front-load type washing machine (so-called "drum washing machine") having a laundry loading port at a front surface thereof.
  • the first embodiment 100 may include a washing tub 110 rotatably mounted at an inner portion of the foregoing cabinet.
  • the washing tub 110 is mounted at an inner portion of an outer tub (not shown), and the outer tub is fixed and provided at an inner portion of the cabinet.
  • a pulsator 120 is rotatably provided at a bottom surface of the washing tub 110.
  • a bearing housing 130 mounted with a bearing rotatably supporting the washing tub 110 is disposed at a lower portion of the washing tub 110, and a drive motor 140 is provided at a lower side of the bearing housing 130.
  • a drive unit which will be described later is provided between the bearing housing 130 and the drive motor 140, and a driving force generated by the drive motor 140 is transferred through the drive unit to rotate the washing tub and pulsator. More specifically, it may be configured such that a stator 150 is disposed at an inner portion of the drive motor 140, and a rotor 160 is disposed at an outer side of the stator 150, and the rotor 160 is combined with the drive unit to transfer a driving force.
  • FIG. 3 is a partial cross-sectional view illustrating a coupling structure between the pulsator 120 and rotor 160.
  • a washing shaft 122 functioning as a rotation shaft of the pulsator 120 is mounted at a central portion of the pulsator 120, and the washing shaft 122 is fixed and provided at the rotor 160. More specifically, a lower end portion of the washing shaft 122 is combined with a fixing nut 162 and thus fixed thereto not to be moved with respect to the rotor 160, wherein a shaft fixing portion 164 and a first bevel gear 166 which will be described later are mounted at an upper surface of the rotor 160.
  • a hole through which the washing shaft 122 passes is formed at an inner surface of the shaft fixing portion 164, and tooth-shaped portions are formed at an inner portion of the hole and an outer surface of the washing shaft 122, respectively, and thus the tooth-shaped portions are engaged with each other, thereby not allowing an outer circumferential surface of the washing shaft 122 and an inner circumferential surface of the hole to be slid.
  • FIG. 4 is an exploded perspective view illustrating a drive unit for transferring a rotational force generated by the drive motor to the pulsator and washing tub.
  • the washing shaft 122 is provided at an upper side of the bearing housing 130 in a protruded manner, and a pulsator (not shown) may be provided at an end portion of the washing shaft 122.
  • the bearing housing 130 is fixed to a bottom surface of the outer tub to support the drive unit and drive motor, and a dehydration shaft 112 supporting the washing tub 110 is provided at the center of the bearing housing 130.
  • the dehydration shaft 112 has a hollow shape the inside of which is vacant, and the foregoing washing shaft 122 is concentrically disposed at an inner portion of the dehydration shaft 112.
  • the dehydration shaft 112 is supported by the bearing housing 130 through a bearing 114, and the bearing 114 is fixed thereto in a state of being inserted into an inner portion of a bearing case 116.
  • a protrusion 116a is formed at a bottom surface of the bearing case 116, wherein a bearing 172 for rotatably supporting a second bevel gear 170 which will be described later is inserted and fixed to an outer circumferential portion of the protrusion 116a.
  • the second bevel gear 170 is concentrically provided with the foregoing first bevel gear 166, and a clutch groove (not shown) engaged with a clutch which will be described later is formed at an inner side thereof.
  • a pair of third bevel gears 180 are fastened between the first and the second bevel gear.
  • the third bevel gears 180 perform a role of transferring a rotational force of the first bevel gear to the second bevel gear, and due to this, the second bevel gear is rotated in an opposite direction to that of the first bevel gear.
  • the third bevel gear is mounted at a gear frame 190, and the gear frame 190 is fixed to a clutch frame 132 which will be described later.
  • the gear frame 190 may include a ring-shaped rim portion 192 and a gear fixing portion 194 formed to be protruded at both bottom sides of the rim portion 192, respectively, and a rotation shaft 184 of the third bevel gears 180 is rotatably supported at an inner portion of the gear fixing portion 194 by a bearing 182.
  • two cut-out portions 196 are formed at a side of the rim portion 192 to allow a hinge coupling portion which will be described later to pass therethrough.
  • a gear ratio of the first through third bevel gears is 1:1. If a diameter of the first bevel gear is less than that of the first or the second bevel gear, then the number of rotations of the third bevel gear is greater than that of the first or the second bevel gear during the operation process, and thus leads to a reduction of power efficiency and an increase of noise.
  • a vertical directional length of the drive unit increases as increasing the size of the third bevel gear, thereby causing a problem of increasing a space occupied within the cabinet. Accordingly, a gear ratio may be preferably set close to 1:1 at the maximum with respect to a limited cabinet size.
  • the clutch fixing frame 132 is formed similarly to the gear frame 190, and a hinge coupling portion 134 by which a clutch lever 105 is rotatably supported is formed at a side thereof.
  • a fastening groove 136 is formed at an end portion of the hinge coupling portion 134, and a protrusion portion 105b of the clutch lever 105 is rotatably inserted and fixed to the fastening groove.
  • a pair of spokes 105a are formed at an end portion of the clutch lever 105, and a clutch which will be described later is inserted and fixed between the spokes 105a. Furthermore, an actuator (not shown) is connected to the other end portion of the clutch lever 105, thereby allowing the clutch lever 105 to be rotated around the protrusion portion 105b.
  • a stepping motor may be used to maintain a state that the clutch lever is stopped at an arbitrary position.
  • a groove combined with the spokes 105a is formed at a central portion of the clutch 152, and a first and a second coupling portion 154, 156 are formed at an upper end portion and a lower end portion thereof, respectively. More specifically, the first coupling portion 154 is engaged with a clutch groove formed at an inner circumferential surface of the second bevel gear 170, and the second coupling portion 156 is engaged with a clutch groove 164a formed at an upper portion surface of the shaft coupling portion 164.
  • the clutch 152 is slidably mounted along an axial direction of the dehydration shaft 112, and thus combined with the second bevel gear or shaft coupling portion by the clutch lever 105 or located between the both sides.
  • tooth-shaped portions engaged with each other are formed at an outer circumferential surface of the dehydration shaft 112 and an inner circumferential surface of the clutch 152, respectively, and thus when the clutch is rotated, the dehydration shaft 112 is also rotated together with the clutch.
  • the washing shaft 122 rotated together with the pulsator 120 is combined with the shaft coupling portion 164 and rotor, and thus when the rotor 160 is rotated, and the pulsator 120 is always rotated in the same direction as that of the rotor 160.
  • first bevel gear 166 fixed to the shaft coupling portion 164 and the second bevel gear 170 engaged with the first bevel gear by the third bevel gear are also rotated together therewith by the rotation of the rotor 160.
  • the pulsator 120, washing shaft 122, shaft coupling portion 164, and first through third bevel gears are rotated at the same time.
  • the first and the second bevel gear are rotated in opposite directions to each other, and more specifically, the second bevel gear is rotated in an opposite direction to that of the rotor 160, namely, in an opposite direction to that of the pulsator 120.
  • whether to rotate the dehydration shaft 112 and the rotational direction of the dehydration shaft 112 are determined based on the location of the clutch 152. More specifically, when the clutch 152 is located between the first and the second bevel gear and thus not engaged with any one of the shaft coupling portion and second bevel gear, the clutch maintains a stopped state with no rotation, and as a result, the dehydration shaft engaged with the clutch also maintains a stopped state. Accordingly, in this case, only the pulsator is rotated, and the washing tub is in a stopped state.
  • an actuator combined with the clutch lever 105 is manipulated to move the clutch 152 in an upward direction as illustrated in FIG. 5 so as to be engaged with a clutch groove formed at an inner portion of the second bevel gear 170. Then, since the second bevel gear 170 is rotated in an opposite direction to that of the pulsator, and thus the clutch 152 engaged therewith is also rotated in the same direction as that of the second bevel gear, and as a result the pulsator and washing tub are rotated in opposite directions to each other. Accordingly, theoretically, a level of water flow same as that of rotating the pulsator at a twice speed in a state that the washing tub is stopped is created, thereby enhancing washing capability or reducing washing time.
  • the clutch When dehydration is carried out after completing the washing cycle, the clutch is moved downward as illustrated in FIG. 6 to be engaged with a clutch groove formed at the shaft coupling portion. In this state, the pulsator and washing tub are rotated in the same direction, and accordingly, dehydration can be carried out while the laundry loaded within the washing tub is rotated at high speed.
  • the present disclosure may not necessarily be limited to the illustrated embodiments.
  • it may be also applicable to a so-called a drum washing machine in which the laundry is loaded from a front surface of the cabinet without being loaded from an upper portion of the cabinet as illustrated in the drawing.
  • a water flow in the anterior-posterior direction of the drum is further activated, thereby obtaining uniform washing capability.
  • a structure having a washing tub and a pulsator located at the bottom surface thereof can be employed, and also it may be possible to configure that two washing tubs are rotated in the same or reverse direction by adding a small-sized washing tub combined with the washing shaft instead of the pulsator.
  • the clutch is engaged with the shaft coupling portion other than the first gear in a state that the clutch is moved to a side of the first gear as illustrated in FIG. 6, but it may not necessarily be limited to this, and a configuration in which the clutch and first gear are directly combined with each other may be also taken into consideration.
  • the present disclosure may be modified and implemented as in a second embodiment, which will be described below.
  • the same elements as the first embodiment are designated with the same names and numeral references and their redundant description will be omitted.
  • FIG. 7 is a cross-sectional view illustrating a power transmission device for transferring a rotational force generated by the drive motor 140 to the washing tub and pulsator
  • FIG. 8 is an exploded perspective view illustrating each constituent element constituting the power transmission device.
  • the tub 110 is combined with the dehydration shaft 112 to be rotated together therewith, and the pulsator 120 is combined with the washing shaft 122 to be rotated together therewith.
  • the dehydration shaft 112 has a hollow shape the inside of which is vacant, and the washing shaft 122 is concentrically disposed at an inner portion of the dehydration shaft 112.
  • the dehydration shaft 112 is combined with the rotor 160, and more specifically, fixed in a state of passing through the center of the shaft fixing plate 262 fixed and provided at an inner surface of the rotor 160. Moreover, a screw thread 122a is formed at a lower end portion of the washing shaft 122, and a fixing nut (not shown) is fastened to the screw thread from a lower surface of the rotor 160, thereby allowing the washing shaft 122 to be rotated together with the shaft fixing plate 262.
  • the shaft fixing plate 262 has a circular disk shape as illustrated in FIG. 8, and a boss portion 264 is formed at a central portion thereof. Moreover, a gear portion 266 is formed at an inner lower portion of the boss portion 264 to be engaged with the gear portion formed at an outer circumferential portion of the washing shaft 122. The gear portion 266 and the gear portion at an outer surface of the washing shaft are engaged with each other, and thus the washing shaft is not slid but rotated together with the shaft fixing plate 262 when the shaft fixing plate 262 is rotated.
  • the shaft fixing plate and boss portion are formed with separate components, but it may not necessarily be limited to this, and an example of forming both the components in an integral body may be also taken into consideration.
  • a bushing 270 is provided at an upper side of the boss portion 264.
  • the washing shaft 122 is penetrated and inserted into a central portion of the bushing 270, and a first and a second bushing gear portion 272, 274 are formed at an outer circumferential surface and an inner circumferential surface thereof, respectively.
  • the first bushing gear portion 272 is gear-combined with a first bevel gear 280 which will be described later, and the second bushing gear portion 274 is engaged with a gear portion formed at an outer circumferential portion of the washing shaft 122. Accordingly, the bushing 270 is rotated together with the boss portion 264.
  • the first bevel gear 280 is disposed at an outer circumferential portion of the bushing 270.
  • the first bevel gear 280 is provided at an inner circumferential surface of the lower bearing bracket 285 fastened at a bottom surface of the bearing housing 130 by interposing a bearing 285a, and a gear portion 282 combined with the first bushing gear portion 272 is formed at an inner circumferential surface thereof.
  • a second clutch 290 is disposed between the bushing 270 and the first bevel gear 280.
  • the second clutch 290 is slidably mounted at an outer circumferential surface of the bushing 270 along a length direction (vertical direction in FIG. 7) of the bushing 270, and gear grooves are formed at an outer circumferential surface and an inner circumferential surface thereof, respectively, to be combined with the first bevel gear and the bushing, respectively.
  • the second clutch 290 is moved downward to be in a state of being separated from the firsts bevel gear and the bushing.
  • an elastic means for example, coil spring, for pressing the second clutch in the upward direction is provided at a lower portion of the second clutch 290, and moved upward unless an external force is applied to the second clutch, and thus maintains a state of being combined with the first bevel gear and the bushing.
  • a second bevel gear 200 rotated in an opposite direction to that of the first bevel gear is provided at an upper portion of the first bevel gear 280.
  • the second bevel gear 200 is rotatably provided at an outer circumferential portion of the upper bearing bracket 202 provided at a bottom surface of the bearing housing 130 by interposing a bearing 202, and a pair of third bevel gears 210 are provided between the first and the second bevel gear.
  • the third bevel gears 210 are rotatably mounted at an inner portion of the lower bearing bracket 285 to perform a role of transferring a rotational force of the first bevel gear to the second bevel gear.
  • the first clutch 220 is slidably mounted in a vertical direction at an outer circumferential portion of the dehydration shaft 112.
  • An end portion of the sleeve 222 disposed to face the second clutch 290 is integrally formed at a lower portion of the first clutch 220. Accordingly, when the first clutch 220 is moved downward, then an end portion of the sleeve 222 presses an upper portion of the second clutch 290, thereby allowing the second clutch to be moved downward.
  • the first clutch 220 is moved upward, the second clutch is restored to an initial position by an elastic force of the coil spring provided at the second clutch.
  • a lever groove 224 is formed at an upper portion of the sleeve 222 to be combined with a lever portion 232 of the clutch lever 230 for moving the first clutch 220 in an upward or downward direction.
  • the clutch lever 230 is configured to move the first clutch in an upward or downward direction by an actuator (not shown).
  • the other side end portion of the clutch lever 230 is connected to the actuator, and thus when the other end portion is moved upward or downward by the actuator, the first clutch is slidably moved while the lever portion 232 is moved in a vertical direction around a hinge shaft 234.
  • a stepping motor may be used to maintain a state that the clutch lever is stopped at an arbitrary position.
  • a gear portion 226 engaged with a gear portion 200a formed at an inner circumferential surface of the second bevel gear 200 is formed at an upper side of the outer circumferential portion of the first clutch 220, and a gear portion engaged with a gear portion formed at a surface of the dehydration shaft 112 is formed at a facing inner circumferential surface of the gear portion 226.
  • a coupling groove 228 combined with the first bushing gear portion 272 of the bushing 270 is formed at an inner circumferential side adjacent to the sleeve 222 when the first clutch 220 is moved downward by more than a predetermined distance.
  • the first clutch when the first clutch is moved to an uppermost end thereof as illustrated in FIG. 9, the first clutch is combined between the dehydration shaft 112 and the second bevel gear.
  • the second clutch is combined between the first bevel gear and bushing by an elastic force of the coil spring. If the shaft fixing plate 262 is rotated in this state, then a rotational force of the bushing 270 is transferred to the dehydration shaft 112 by passing it through the sequence of the second clutch 290, the first bevel gear 280, the first bevel gear 210, the second bevel gear 200, and the first clutch 220.
  • the first bevel gear and second bevel gear are rotated in opposite directions to each other, and thus the rotation directions of the bushing and the dehydration shaft are opposite to each other.
  • the bushing is rotated in the same direction as that of the washing shaft 122, and as a result, the tub and pulsator are rotated in opposite directions to each other.
  • the first clutch is moved to a lowermost end thereof by the clutch lever as illustrated in FIG. 10, then the first clutch is separated from the second bevel gear, and the coupling groove 228 is combined with the first bushing gear portion 272 of the bushing.
  • the second clutch is pressed by the sleeve 222 of the first clutch to be moved downward, and as a result, remains at an outer circumferential portion of the bushing in a state of being separated from the first bevel gear as illustrated in FIG. 10.
  • the gear portion and the coupling groove are combined with the dehydration shaft and bushing, respectively, the first clutch is rotated together with the shaft fixing plate, the first clutch, and the dehydration shaft.
  • a rotational force of the bushing 270 is directly transferred to the dehydration shaft through the first clutch, and the first through third bevel gears maintain a stopped state without being rotated. Accordingly, the dehydration shaft 112 and washing shaft 122 are rotated in the same direction, and thus a noise generated by the rotation of the first through third bevel gears will disappear.
  • the tub and pulsator when the tub and pulsator are rotated in the same direction, it corresponds to a dehydration cycle in which the laundry is rotated at high speed compared to a washing cycle, thereby maximizing the effect of reducing such a noise.
  • first clutch is located at a middle portion between the uppermost end and the lowermost end as illustrated in FIG. 7, then it may be separated from the second bevel gear and bushing, and combined only with the dehydration shaft 112. Moreover, the second clutch is moved to a position separated from the first bevel gear by the sleeve 222, and thus the first through third bevel gears, first clutch and dehydration shaft are stopped with no rotation, and only the dehydration shaft is rotated.
  • a gear ratio of the first through third bevel gears is 1:1. If a diameter of the first bevel gear is less than that of the first or the second bevel gear, then the number of rotations of the third bevel gear is greater than that of the first or the second bevel gear during the operation process, and thus leads to a reduction of power efficiency and an increase of noise.
  • a vertical directional length of the drive unit increases as increasing the size of the third bevel gear, thereby causing a problem of increasing a space occupied within the cabinet. Accordingly, a gear ratio may be preferably set close to 1:1 at the maximum with respect to a limited cabinet size.

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

Abstract

La présente invention a trait à une machine à laver dotée d'une cuve de lavage rotative bidirectionnelle, laquelle machine à laver inclut, selon un aspect de la présente invention, un réservoir d'eau ; une cuve qui est prévue rotative sur une partie intérieure du réservoir d'eau ; un pulsateur qui est prévu rotatif à l'intérieur de la cuve ; un premier arbre de rotation qui est combiné à la cuve de manière à ce qu'ils soient tournés ensemble grâce audit arbre ; un second arbre de rotation qui est combiné au pulsateur de manière à ce qu'ils soient tournés ensemble grâce audit arbre et qui est prévu sur une partie intérieure du premier arbre de rotation ; un moteur d'entraînement qui est configuré de manière à transférer une force de rotation au second arbre de rotation ; un moyen d'embrayage qui est configuré de manière à se déplacer sur le premier arbre de rotation et qui est mis en prise avec le premier arbre de rotation de manière à ce qu'ils tournent ensemble grâce audit moyen ; un premier engrenage qui tourne dans la même direction que celle du second arbre de rotation au moyen du moteur d'entraînement ; un second engrenage qui est disposé de manière à faire face au premier engrenage afin d'être tourné dans la direction inverse à celle du premier engrenage ; et un moyen d'entraînement d'embrayage qui est configuré de manière à déplacer l'embrayage pour se mettre en prise avec le premier engrenage ou le second engrenage ou pour se placer entre les deux engrenages.
PCT/KR2012/002071 2011-03-24 2012-03-22 Machine à laver dotée d'une cuve rotative bidirectionnelle WO2012128567A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020110026586A KR101807498B1 (ko) 2011-03-24 2011-03-24 양방향으로 회전 가능한 세탁조를 갖는 세탁기
KR10-2011-0026586 2011-03-24
KR10-2011-048687 2011-05-23
KR1020110048687A KR101740361B1 (ko) 2011-05-23 2011-05-23 양방향으로 회전 가능한 터브를 갖는 세탁기

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WO2012128567A2 true WO2012128567A2 (fr) 2012-09-27
WO2012128567A3 WO2012128567A3 (fr) 2013-01-03

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CN104631046A (zh) * 2013-11-14 2015-05-20 日本电产三协株式会社 离合装置以及洗衣机
US20160348296A1 (en) * 2015-05-28 2016-12-01 Lg Electronics Inc. Laundry treatment machine
EP3109357A4 (fr) * 2014-02-19 2017-10-04 LG Electronics Inc. Procédé de lavage
US11346035B2 (en) 2017-04-07 2022-05-31 Samsung Electronics Co., Ltd. Washing machine
CN114990852A (zh) * 2022-03-21 2022-09-02 刘富豪 一种减速器及一种双动力波轮洗衣机
CN116242120A (zh) * 2023-05-12 2023-06-09 甘肃康乐药业有限责任公司 一种中药饮片切制成型后加工装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104631046A (zh) * 2013-11-14 2015-05-20 日本电产三协株式会社 离合装置以及洗衣机
EP3109357A4 (fr) * 2014-02-19 2017-10-04 LG Electronics Inc. Procédé de lavage
US11840791B2 (en) 2014-02-19 2023-12-12 Lg Electronics Inc. Washing method
US20160348296A1 (en) * 2015-05-28 2016-12-01 Lg Electronics Inc. Laundry treatment machine
EP3098343A3 (fr) * 2015-05-28 2017-02-08 Lg Electronics Inc. Machine de traitement du linge
US10883218B2 (en) 2015-05-28 2021-01-05 Lg Electronics Inc. Laundry treatment machine
US11346035B2 (en) 2017-04-07 2022-05-31 Samsung Electronics Co., Ltd. Washing machine
CN114990852A (zh) * 2022-03-21 2022-09-02 刘富豪 一种减速器及一种双动力波轮洗衣机
CN114990852B (zh) * 2022-03-21 2023-09-29 刘富豪 一种减速器及一种双动力波轮洗衣机
CN116242120A (zh) * 2023-05-12 2023-06-09 甘肃康乐药业有限责任公司 一种中药饮片切制成型后加工装置

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