WO2017114395A1 - 洗衣机 - Google Patents

洗衣机 Download PDF

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Publication number
WO2017114395A1
WO2017114395A1 PCT/CN2016/112440 CN2016112440W WO2017114395A1 WO 2017114395 A1 WO2017114395 A1 WO 2017114395A1 CN 2016112440 W CN2016112440 W CN 2016112440W WO 2017114395 A1 WO2017114395 A1 WO 2017114395A1
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WO
WIPO (PCT)
Prior art keywords
ring magnet
outer ring
cylinder
magnet
washing machine
Prior art date
Application number
PCT/CN2016/112440
Other languages
English (en)
French (fr)
Inventor
武凤玲
劳春峰
尹翔
牟秋启
Original Assignee
青岛海尔智能技术研发有限公司
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 青岛海尔智能技术研发有限公司 filed Critical 青岛海尔智能技术研发有限公司
Priority to US16/060,662 priority Critical patent/US10316450B2/en
Publication of WO2017114395A1 publication Critical patent/WO2017114395A1/zh

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F23/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry 
    • D06F23/04—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry  and rotating or oscillating about a vertical 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
    • D06F37/24—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 vertical 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
    • D06F37/12—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a vertical 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
    • D06F37/26—Casings; Tubs
    • D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
    • D06F37/268—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups for suspension devices
    • 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
    • D06F37/26—Casings; Tubs
    • D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
    • D06F37/269—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups for the bearing of the rotary receptacle
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30—Driving arrangements 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/18—Suppression of vibrations in rotating systems by making use of members moving with the system using electric, magnetic or electromagnetic means
    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 

Definitions

  • the present invention relates to household appliances, and more particularly to a washing machine.
  • the pulsator washing machine used in our daily life has a large vibration of the whole washing machine due to the eccentricity of the washing items and the resonance of the system during the washing process, and at the same time, a large noise is generated, which affects the user experience.
  • the prior art pulsator washing machine usually uses a plurality of (usually four) booms to suspend and fix the outer cylinder in the casing of the washing machine, and the inner cylinder is rotatably disposed in the outer cylinder to reduce the working process of the washing machine. Vibration, but the effect is not very obvious.
  • An object of the present invention is to provide a washing machine that achieves vibration and noise reduction by using new technical means in view of the above-mentioned drawbacks of the prior art.
  • the present invention provides a washing machine including an outer cylinder, an inner cylinder rotatably disposed in the outer cylinder, and a rotating mechanism for driving the rotation of the inner cylinder, the rotating shaft of the rotating mechanism extending upward from the lower side of the outer cylinder To the bottom wall of the inner cylinder to drive the inner cylinder to rotate;
  • the washing machine also includes:
  • each pair of magnets including an outer ring magnet and an inner ring magnet disposed opposite the outer ring magnet of the outer ring magnet, wherein
  • the inner ring magnet is disposed on the rotating shaft, and the outer ring magnet is disposed on the bottom wall of the inner cylinder or the bottom wall of the outer cylinder to reduce the radial vibration of the inner cylinder or the outer cylinder by the magnetic force between the outer ring magnet and the inner ring magnet Amplitude.
  • the at least one magnet pair comprises an upper magnet pair
  • the upper magnet pair comprises an upper outer ring magnet disposed on a lower surface of the inner cylinder bottom wall, and an upper inner ring magnet disposed on the rotating shaft and opposite to the upper outer ring magnet, The magnitude of the radial vibration of the inner cylinder is reduced by the magnetic force between the upper outer ring magnet and the upper inner ring magnet.
  • the at least one magnet pair further includes a lower magnet pair
  • the lower magnet pair includes: a lower outer ring magnet disposed on an upper surface of the outer cylinder bottom wall; and a lower inner ring magnet disposed on the rotating shaft and opposite to the lower outer ring magnet, The amplitude of the radial vibration of the outer cylinder is reduced by utilizing the magnetic force between the lower outer ring magnet and the lower inner ring magnet.
  • the lower outer ring magnet is disposed opposite to the upper outer ring magnet, and the upper end surface of the lower outer ring magnet and the lower end surface of the upper outer ring magnet have the same polarity to utilize the lower outer ring magnet and the upper outer ring magnet
  • the magnetic repulsive force supports the inner cylinder in the outer cylinder.
  • the upper inner ring magnet and the upper outer ring magnet are permanent magnet rings
  • a lower surface of the bottom wall of the inner cylinder is provided with a flange, the flange has a through hole through which the rotating shaft can be inserted, and the rotating shaft is coupled with the flange to drive the inner cylinder to rotate through the flange;
  • the upper outer ring magnet is fixed to the lower surface of the flange and surrounds the through hole of the flange.
  • the upper end surface of the upper inner ring magnet and the upper end surface of the upper outer ring magnet have the same polarity
  • the lower end surface of the upper inner ring magnet and the lower end surface of the upper outer ring magnet have the same polarity to utilize the upper inner ring.
  • the magnetic repulsive force between the magnet and the upper outer ring magnet reduces the amplitude of the radial vibration of the inner cylinder.
  • the lower inner ring magnet and the lower outer ring magnet are permanent magnet rings
  • the lower outer ring magnet is fixed to the upper surface of the bottom wall of the outer cylinder and surrounds the central shaft hole of the bottom wall of the outer cylinder.
  • the upper end surface of the lower inner ring magnet and the upper end surface of the lower outer ring magnet have the same polarity
  • the lower end surface of the lower inner ring magnet and the lower end surface of the lower outer ring magnet have the same polarity to utilize the lower inner ring
  • the magnetic repulsive force between the magnet and the lower outer ring magnet reduces the amplitude of the radial vibration of the outer cylinder.
  • the lower inner ring magnet and the lower outer ring magnet and the upper inner ring magnet and the upper outer ring magnet are both made of the same permanent magnet material;
  • the upper inner ring magnet and the upper outer ring magnet have the same thickness
  • the upper inner ring magnet and the upper outer ring magnet are at the same vertical height
  • the lower inner ring magnet and the lower outer ring magnet have the same thickness
  • the lower inner ring magnet and the lower outer ring magnet are at the same vertical height
  • the washing machine further comprises: a casing and a plurality of adjustable damping booms for suspending the outer cylinder in the casing, wherein each adjustable damping boom comprises:
  • a cylinder having a cavity for containing a magnetorheological fluid therein;
  • the elongated boom is provided with a top mounting seat at the top thereof for hanging the adjustable damping boom on the hanger of the casing, and the bottom end is inserted into the cylinder from the upper end of the cylinder and is worn through the lower end of the cylinder Out
  • a piston fixedly disposed on an elongated boom located in the cavity, the piston being provided with a coil for generating a magnetic field and a liquid flow passage extending axially through the piston for the flow of the magnetorheological fluid, and
  • a spring is sleeved on the elongated boom between the bottom end of the elongated boom and the lower end of the cylinder;
  • the upper end of the cylinder body is formed with an upwardly extending positioning portion for cooperating with the shock absorbing seat of the outer cylinder,
  • the outer cylinder is suspended by gravity on the adjustable damping boom.
  • the inner cylinder and/or the outer cylinder may be tilted indefinitely due to the eccentricity of the laundry, resulting in collision between the inner cylinder and the outer cylinder and even between the outer cylinder and the casing.
  • the washing machine of the present invention is provided with at least one magnet pair including an outer ring magnet and an inner ring magnet between the inner cylinder bottom wall and the outer cylinder bottom wall, and further the inner ring magnet is disposed on the rotating shaft for driving the inner cylinder to rotate,
  • the ring magnet is disposed on the bottom wall of the inner cylinder or the bottom wall of the outer cylinder, so that when the inner cylinder and/or the outer cylinder radially vibrate due to eccentricity of the clothes in the inner cylinder, the inner ring magnet and the outer ring magnet corresponding thereto are utilized.
  • the magnetic vibration buffers the radial vibration of the inner cylinder and/or the outer cylinder to reduce the amplitude of the radial vibration of the inner cylinder and/or the outer cylinder, thereby effectively compensating for the vibration generated by the eccentricity of the laundry in the inner cylinder, and simultaneously reducing the vibration noise to achieve the reduction.
  • the purpose of vibration reduction is to reduce the amplitude of the radial vibration of the inner cylinder and/or the outer cylinder to reduce the amplitude of the radial vibration of the inner cylinder and/or the outer cylinder, thereby effectively compensating for the vibration generated by the eccentricity of the laundry in the inner cylinder, and simultaneously reducing the vibration noise to achieve the reduction.
  • the washing machine of the present invention is provided with an upper outer ring magnet and an upper inner ring magnet (ie, an upper magnet pair) through a lower surface of the inner cylinder bottom wall and a rotating shaft that drives the inner cylinder to rotate, so that the laundry can be eccentric in the inner cylinder.
  • the magnetic force especially the repulsive force
  • the upper inner ring magnet and the upper outer ring magnet is used to buffer and balance the vibration of the inner cylinder, thereby reducing the amplitude of the inner cylinder radial vibration, thereby effectively It compensates for the vibration caused by the eccentricity of the clothes in the inner cylinder, and at the same time reduces the vibration noise to achieve the purpose of vibration reduction and noise reduction.
  • the washing machine of the present invention respectively provides a lower outer ring magnet and a lower inner ring magnet (ie, a lower magnet pair) on the upper surface of the outer cylinder bottom wall and the rotating shaft that drives the inner cylinder to rotate, so that the inner cylinder vibrates to cause the outer cylinder to have a diameter.
  • a lower outer ring magnet and a lower inner ring magnet ie, a lower magnet pair
  • the rotating shaft that drives the inner cylinder to rotate
  • the inner cylinder vibrates to cause the outer cylinder to have a diameter.
  • the washing machine of the present invention has the upper outer ring magnet and the lower outer ring magnet opposed to each other, and the upper end surface of the lower outer ring magnet and the lower end surface of the upper outer ring magnet have the same polarity, so that the inner tube is located above the upper portion.
  • the repulsive force between the ring magnet and the lower outer ring magnet is rotatably suspended inside the outer cylinder.
  • the inner cylinder can be rotatably supported in the outer cylinder and the inner cylinder
  • the gravity of its contents is directly applied to the bottom wall of the outer cylinder by magnetic force, thereby reducing the force on the rotating bearing connecting the inner cylinder and the rotating mechanism, avoiding fatigue failure, prolonging its service life, and further reducing
  • the cost of the washing machine is small.
  • the inner cylinder is suspended in the outer cylinder, the mechanical contact between the inner cylinder and the outer cylinder is reduced.
  • the upper outer ring magnet and the lower outer ring When there is relative movement between the inner cylinder and the outer cylinder in the axial direction, the upper outer ring magnet and the lower outer ring The magnetic repulsion between the magnets can act as a buffer The vibration of the washing machine during washing and dewatering is greatly reduced, and the noise is further reduced.
  • FIG. 1 is a schematic structural view of a washing machine in accordance with one embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view of a washing machine in accordance with one embodiment of the present invention, with the housing omitted;
  • Figure 3 is an enlarged schematic view of the D area shown in Figure 2;
  • Figure 4 is a schematic structural view of a flange in the washing machine of Figure 3;
  • FIG. 5 is a schematic perspective view of a balance ring in the washing machine of Figure 1;
  • Figure 6 is a schematic structural view of an outer cylinder in the washing machine shown in Figure 1;
  • Figure 7 is a schematic cross-sectional view of an adjustable damping boom in the washing machine of Figure 1.
  • the washing machine 100 may generally include a casing 110, an outer cylinder 120 disposed in the casing 110, an inner cylinder 130 rotatably disposed in the outer cylinder 120, and a rotation for driving the rotation of the inner cylinder 130.
  • Agency 800 The washing machine 100 may generally include a casing 110, an outer cylinder 120 disposed in the casing 110, an inner cylinder 130 rotatably disposed in the outer cylinder 120, and a rotation for driving the rotation of the inner cylinder 130.
  • Agency 800 for driving the rotation of the inner cylinder 130.
  • FIG. 2 is a schematic cross-sectional view of a washing machine 100 in accordance with one embodiment of the present invention, with the housing 110 omitted; and FIG. 3 is a schematic enlarged view of the D area shown in FIG. 2.
  • the rotating mechanism 800 can include a drive motor 830 and a transmission mechanism 840 having a planet gear and a sun gear.
  • the drive motor 830 drives the inner cylinder 130 and the pulsator 160 via a transmission mechanism 840. Rotate in the same or opposite directions.
  • the rotating mechanism 800 is disposed under the bottom wall 120a of the outer cylinder 120.
  • the rotating shaft 842 of the rotating mechanism 800 extends upward from the lower side of the outer cylinder 120 to the bottom wall 130a of the inner cylinder 130 to drive the inner cylinder 130 to rotate. It will be understood by those skilled in the art that the rotating shaft 842 can directly drive the inner cylinder 130 to rotate, and can also indirectly drive the inner cylinder 130 to rotate by an intermediate member such as the flange 170 mentioned later. In the preferred embodiment herein, the lower surface of the bottom wall 130a of the inner cylinder 130 is provided with a flange 170, and the rotating shaft 842 indirectly drives the inner cylinder 130 to rotate through the flange 170.
  • FIG. 4 is a schematic structural view of a flange 170 in the washing machine 100 shown in FIG. Flange 170
  • the flange body 172 includes a through hole 171 through which the rotating mandrel 841 is bored, and a plurality of mounting legs 173 extending outward from the flange body 172.
  • the rotating shaft 842 is positively coupled to the flange 170 to drive the inner cylinder 130 to rotate through the flange 170.
  • a screw hole is formed in the distal end of each of the mounting legs 173 to fix the flange 170 to the bottom wall 130a of the inner cylinder 130 by screws.
  • the rotating mandrel 841 of the rotating mechanism 800 can extend from the lower side of the outer cylinder 120 into the inner cylinder 130 inside the rotating shaft 842 to drive the pulsator 160 disposed in the inner cylinder 130 to rotate.
  • a seal ring (not shown) may be disposed between the rotating mandrel 841 and the rotating shaft 842 and at the junction of the rotating shaft 842 and the outer cylinder bottom wall 120a.
  • the washing machine 100 further includes at least one magnet pair.
  • the magnet pair includes an outer ring magnet and an inner ring magnet disposed opposite to the radially inner side of the outer ring magnet; wherein the inner ring magnet is disposed on the rotating shaft 842, and the outer ring magnet is disposed on the bottom wall 130a or the outer tube 120 of the inner cylinder 130
  • the bottom wall 120a is such that the magnitude of the radial vibration of the inner cylinder 130 and/or the outer cylinder 120 is reduced by the magnetic force between the inner ring magnet and the outer ring magnet.
  • the inner cylinder 130 and/or the outer cylinder 120 may be tilted indefinitely due to the eccentricity of the laundry, resulting in a collision between the inner cylinder 130 and the outer cylinder 120 and even between the outer cylinder 120 and the casing 110. .
  • the washing machine 100 of the present invention is provided with at least one magnet pair between the inner cylinder bottom wall 130a and the outer cylinder bottom wall 120a, so that when the inner cylinder 130 and/or the outer cylinder 120 are radially vibrated due to eccentricity of the laundry in the inner cylinder,
  • the amplitude of the radial vibration of the inner cylinder 130 and/or the outer cylinder 120 is reduced, thereby effectively compensating for the inner cylinder In 130, the vibration generated by the eccentricity of the clothes reduces the vibration noise and achieves the purpose of vibration reduction and noise reduction.
  • the outer ring magnet of one of the magnet pairs is disposed on the lower surface of the bottom wall 130a of the inner cylinder 130.
  • the outer ring magnet of the other magnet pair may be disposed on the lower surface of the bottom wall 130a of the inner cylinder 130 or on the upper surface of the bottom wall 120a of the outer cylinder 120.
  • the inner ring magnet and the outer ring magnet of the pair of magnets may be made of a permanent magnet material.
  • One step is preferably made of a neodymium iron boron magnetic material.
  • at least one of the inner ring magnet and the outer ring magnet of the pair of magnets may be an electromagnet.
  • the electromagnet may include an iron core and an energized coil wound around the iron core.
  • the inner ring magnet and the outer ring magnet of the pair of magnets are disposed substantially concentrically and are substantially concentrically disposed with the rotational axis 842 of the rotating mechanism. It will be understood by those skilled in the art that a substantially concentric arrangement is understood to mean that the center of the inner ring magnet substantially coincides with the center of the upper outer ring magnet and substantially coincides with the axis of the rotating shaft 842.
  • the at least one pair of magnets includes an upper pair of magnets.
  • the upper magnet pair includes an upper outer ring magnet 139 disposed on a lower surface of the bottom wall 130a of the inner cylinder 130 and an upper inner ring magnet 138 disposed on the rotating shaft 842, and the upper inner ring magnet 138 is disposed opposite to the upper outer ring magnet 139.
  • the magnitude of the radial vibration of the inner cylinder 130 is reduced by the magnetic force between the upper inner ring magnet 138 and the upper outer ring magnet 139.
  • the upper inner ring magnet 138 may be mounted or fixed to the rotating shaft 842 and adjacent to or adjacent to the lower surface of the bottom wall 130a of the inner cylinder 130 to be disposed opposite the upper outer ring magnet 139.
  • the upper outer ring magnet 139 can be disposed on the flange 170 to be indirectly disposed on the lower surface of the bottom wall 130a of the inner barrel 130.
  • the upper inner ring magnet 138 and the upper outer ring magnet 139 are both permanent magnet rings; and the upper outer ring magnet 139 is fixed to the lower surface of the flange 170 and surrounds the flange 170.
  • the upper inner ring magnet 138 and the upper outer ring magnet 139 may each be a discontinuous ring magnet, i.e., the upper inner ring magnet 138 and the upper outer ring magnet 139 are each spaced apart from each other on their respective circumferences. Magnetic block composition.
  • the upper end surface of the upper inner ring magnet 138 and the upper end surface of the upper outer ring magnet 139 have the same polarity, and the lower end faces of the upper inner ring magnet 138 and the lower end faces of the upper outer ring magnet 139 have the same polarity.
  • the magnitude of the radial vibration of the inner cylinder 130 is reduced by the magnetic repulsive force between the upper inner ring magnet 138 and the upper outer ring magnet 139.
  • the same polarity means that both are N poles or both S poles.
  • eccentricity of the laundry in the inner cylinder 130 causes radial vibration of the inner cylinder 130 and the outer cylinder 120.
  • the inner cylinder 130 is vibrated to one side (such as front, rear, left or right)
  • the distance between the upper outer ring magnet 139 and the upper inner ring magnet 138 between the sides becomes small, thereby causing the upper outer ring.
  • the repulsive force between the magnet 139 and the upper inner ring magnet 138 is increased, and the inner cylinder 130 is urged to move in the opposite direction under the action of the repulsive force, thereby effectively compensating for the eccentricity of the laundry in the inner cylinder 130.
  • Vibration reducing the vibration amplitude of the inner cylinder 130, buffering its radial vibration.
  • the upper inner ring magnet 138 and the upper outer ring magnet 139 are made of the same permanent magnet material; the upper inner ring magnet 138 and the upper outer ring magnet 139 have the same thickness, and the upper inner ring magnet 138 and the upper portion
  • the outer ring magnets 139 are at the same vertical height; to ensure that the upper inner ring magnet 138 and the upper outer ring magnet 139 are strictly oppositely disposed to better utilize the magnetic force between the two to buffer the radial vibration of the inner drum 130 of the washing machine.
  • the at least one magnet pair further includes a lower magnet pair.
  • the lower magnet pair includes a lower outer ring magnet 129 provided on the upper surface of the bottom wall 120a of the outer cylinder 120 and a lower inner ring magnet 128 provided on the rotating shaft 842.
  • the lower inner ring magnet 128 is disposed opposite to the lower outer ring magnet 129 to reduce the amplitude of the radial vibration of the outer cylinder 120 by the magnetic force between the lower inner ring magnet 128 and the lower outer ring magnet 129.
  • the lower inner ring magnet 128 can be mounted or fixed to the rotating shaft 842 and adjacent to or adjacent to the upper surface of the bottom wall 120a of the outer cylinder 120 to be disposed opposite the lower outer ring magnet 129.
  • the lower inner ring magnet 128 and the lower outer ring magnet 129 are both permanent magnet rings; and the lower outer ring magnet 129 is fixed to the upper surface of the bottom wall 120a of the outer cylinder 120 and surrounds the outer cylinder bottom wall 120a.
  • the central shaft hole Around the central shaft hole.
  • the upper end surface of the lower inner ring magnet 128 and the upper end surface of the lower outer ring magnet 129 have the same polarity, and the lower end faces of the lower inner ring magnet 128 and the lower end faces of the lower outer ring magnet 129 have the same polarity.
  • the magnitude of the radial vibration of the outer cylinder 120 is reduced by the magnetic repulsive force between the lower inner ring magnet 128 and the lower outer ring magnet 129.
  • the lower inner ring magnet 128 and the lower outer ring magnet 129 are each made of the same permanent magnet material.
  • the lower inner ring magnet 128 and the lower outer ring magnet 129 have the same thickness, and the lower inner ring magnet 128 and the lower outer ring magnet 129 are at the same vertical height; so that the lower inner ring magnet 128 and the lower outer ring magnet 129 are strictly oppositely disposed, thereby Better use of the magnetic force between the two buffers the radial vibration of the outer cylinder 120 of the washing machine.
  • the lower outer ring magnet 129 is disposed opposite the upper outer ring magnet 139, and the lower outer ring magnet 129 and the opposite outer surfaces of the upper outer ring magnet 139 have the same polarity to utilize the lower outer ring.
  • the magnetic repulsive force between the magnet 129 and the upper outer ring magnet 139 supports the inner cylinder 130 in the outer cylinder 120.
  • the "lower outer ring magnet 129 is disposed opposite to the upper outer ring magnet 139", that is, the upper end surface of the lower outer ring magnet 129 is disposed opposite to the lower end surface of the upper outer ring magnet 139, which means that the lower outer ring magnet 129 is The upper outer ring magnet 139 is cast on the horizontal plane The shadows at least partially overlap such that there is a large repulsive force between the lower outer ring magnet 129 and the upper outer ring magnet 139 to suspend the inner cylinder 130.
  • the upper outer ring magnet 139 is suspended above the lower outer ring magnet 129 by the magnetic repulsive force of the lower outer ring magnet 129, and under the magnetic repulsion between the upper outer ring magnet 139 and the lower outer ring magnet 129,
  • the upper outer ring magnet 139 can generate an upward supporting force to the inner cylinder 130 through the inner cylinder bottom wall 130a, so that the inner cylinder 130 is suspended and supported in the outer cylinder 120 against the gravity of the inner cylinder 130 and the gravity of the contents thereof. Therefore, the inner cylinder 130 is not in contact with the outer cylinder 120, and mechanical friction is prevented between the inner cylinder 130 and the outer cylinder 120, thereby effectively reducing the vibration and noise.
  • the gravity of the inner cylinder 130 itself and the gravity of its contents can be directly applied to the outer cylinder bottom wall 120a through the upper outer ring magnet 139 and the lower outer ring magnet 129.
  • the above washing machine 100 can also be referred to as a magnetic levitation washing machine.
  • the inner cylinder 130 is supported in the outer cylinder 120 by the magnetic repulsive force between the lower outer ring magnet 129 and the upper outer ring magnet 139, which is equivalent to adding one between the inner cylinder 130 and the outer cylinder 120.
  • the upper inner ring magnet 138 and the lower inner ring magnet 128 are disposed on the rotating shaft 842, and the upper outer ring magnet 139 and the lower outer ring magnet are respectively disposed on the lower surface of the inner cylinder bottom wall 130a and the upper surface of the outer cylinder bottom wall 120a.
  • the invention combines the upper inner ring magnet 138, the lower inner ring magnet 128, the upper outer ring magnet 139 and the lower outer ring magnet 129 to form an organic whole, which can realize axial vibration buffering and radial vibration restraint, which is expected Excellent shock absorption effect.
  • the lower inner ring magnet 128 and the lower outer ring magnet 129 and the upper inner ring magnet 138 and the upper outer ring magnet 139 are both made of the same permanent magnet material. Further, the projection of the lower outer ring magnet 129 and the upper outer ring magnet 139 on the horizontal plane may be substantially coincident; that is, the inner diameter of the lower outer ring magnet 129 is substantially the same as the inner diameter of the upper outer ring magnet 139, and the lower outer ring magnet 129 is The outer diameter is substantially the same as the outer diameter of the upper outer ring magnet 139, and the lower outer ring magnet 129 and the upper outer ring magnet 139 are disposed substantially coaxially to ensure that the lower outer ring magnet 129 and the upper outer ring magnet 139 are strictly oppositely disposed.
  • the inner cylinder 130 can be more smoothly suspended inside the outer cylinder 120.
  • the distance between the lower outer ring magnet 129 and the upper outer ring magnet 139 is about 1 cm - 2 cm, and the repulsive force between the lower outer ring magnet 129 and the upper outer ring magnet 139 is about 280 N - 350 N.
  • the size of the repulsive force selected within this range is sufficient to smoothly float the inner cylinder 130 filled with laundry and water.
  • the washing machine 100 includes both an upper magnet pair and a lower magnet pair. In an alternative embodiment, the washing machine 100 may include only an upper magnet pair or a lower magnet pair.
  • the inventors of the present invention have found that the magnetic levitation washing machine that supports the inner cylinder 130 in the outer cylinder 120 by utilizing the repulsive force between the two magnetic rings (referred to as the upper and lower magnets) disposed oppositely above and below is relied on
  • the repulsive force between the magnets suspends the inner cylinder 130 above the outer cylinder 120, causing the inner cylinder 130 to lose radial restraint when rotating at a high speed, so that radial sway is likely to occur.
  • one or two inner ring magnets disposed on the rotating shaft may be added to the magnetic levitation washing machine to form one or two magnetic ring pairs with the original upper and lower magnetic rings, thereby alleviating the radial direction of the inner cylinder and/or the outer cylinder. vibration.
  • the washing machine 100 further includes a balance ring 900 disposed on top of the inner barrel 130.
  • FIG. 5 is a schematic perspective view of the balance ring 900 in the washing machine 100 of FIG. 1.
  • the gimbal ring 900 includes a housing 91 having an annular chamber 920 therein for receiving a balancing medium and at least one arcuate partition 92 disposed in the annular chamber 920.
  • Each of the arcuate partitions 92 extends from the inner peripheral wall 902 of the annular chamber 920 to an outer peripheral wall 901 thereof, and each of the arcuate partitions 92 is provided with a liquid passage hole for the balance medium to flow in the annular chamber 920 ( Not shown in the figure).
  • the balancing medium can be saline, or other suitable fluid.
  • the arcuate partition 92 of the embodiment of the present invention is advantageous for reducing the balance medium flow resistance inside the gimbal 900 as compared to the planar baffle.
  • the angle ⁇ between the tangent S1 of each arc-shaped partition 92 at its outer end in its extending direction and the tangent S2 of the outer peripheral wall 901 of the annular chamber 920 at the outer end in the rotational direction A1 is an acute angle .
  • the rotation direction A1 is a rotation direction opposite to the rotation direction A2 of the inner cylinder 130 (or the balance ring 900) when the washing machine 100 is in the dry operation.
  • the tangent S1 along the extending direction of the arc-shaped partition 92 at its outer end can be understood as a tangent extending along the extending direction of the arc-shaped partition 92, that is, the tangent S1 and S1' in FIG. S1".
  • the tangent S2 of the outer peripheral wall 901 of the annular chamber 920 at the outer end in the rotational direction A1 is understood to be relative to the direction in which the arcuate partition 92 extends, or in relation to the arcuate partition 92.
  • a tangent line along the extending direction of the outer end, a tangent line of the outer peripheral wall 901 extending in the rotational direction A1 at the outer end; or the tangent S2 is the outer peripheral wall 901 of the annular chamber 920 facing the tangent at the outer end a turn
  • the balance medium flow resistance inside the balance ring 900 can be reduced, and the time during which the balance medium in the annular chamber 920 reaches the outer peripheral wall 901 of the annular chamber 920 can be shortened. Therefore, the balance medium is quickly concentrated along the arc-shaped partition 92 to the opposite side of the eccentric force, achieving eccentric self-compensation, and quickly balancing the eccentricity generated by the rotation of the inner cylinder 130.
  • a plurality of planar partitions are also disposed in the annular inner chamber 920 that are spaced from the plurality of curved partitions 92.
  • each arcuate partition 92 at its outer end along its extension direction and the outer circumferential wall 901 of the annular chamber 920 are clamped between the tangent S2 of the rotational direction A1 at the outer end.
  • the angle ⁇ is 30-60°, which further shortens the time when the equilibrium medium in the annular chamber 920 reaches the outer peripheral wall 901, and quickly functions to balance the eccentricity generated by the rotation of the inner cylinder 130.
  • each arc-shaped partition 92 has a tangent to each of its extended lengths along its extending direction and a circumference (or the point) that passes through the location and is concentric with the inner peripheral wall 902 of the annular chamber 920.
  • the circumference of the circumference of the annular chamber 920 that is concentric with the inner peripheral wall 902 of the annular chamber 920 is an acute angle or an angle of 0° (or an angle between the two is less than 90) at the point in the rotational direction A1. °).
  • the number of arcuate partitions 92 in the gimbal 900 is from 8 to 12, preferably ten.
  • the balance ring 900 facilitates maintaining the balance medium at a radially opposite position of the maximum eccentric portion when the drum 130 rotates during the dehydration and drying phase of the washing machine 100, thereby effectively suppressing the eccentric vibration problem at the time of low speed rotation. .
  • the balance ring 900 of the present invention provides a balance when the rotational speed of the inner cylinder 130 is relatively low compared to all prior art balance rings that utilize radial partitions.
  • the balance ring of the prior art needs to balance when the rotation speed of the inner cylinder 130 reaches a certain speed threshold.
  • the rotation speed of the inner cylinder 130 is lower than the threshold of the foregoing rotation speed.
  • the balance ring 900 can be balanced in the range of the rotational speed, so that the washing machine 100 according to the embodiment of the present invention can have a small vibration amplitude at the initial stage of the dehydration and drying operation of the inner cylinder 130 thereof.
  • the outer cylinder 120 is typically suspended within the casing 110 by a plurality of booms.
  • the circumferential inner wall of the casing 110 is distributed with a plurality of hangers 111, and the outer cylinder 120 is distributed at the lower portion of the outer wall.
  • Multiple shock mounts 121 for respectively connecting with a plurality of booms.
  • the number of the suspension seat 111 and the shock absorbing seat 121 is four, and is evenly distributed along the circumference of the outer cylinder 120, so that the four booms are evenly stressed.
  • the boom in the embodiment of the present invention is preferably an adjustable damping boom 10 that can adjust the magnitude of the damping by varying the size of the magnetic field.
  • Figure 7 is a schematic cross-sectional view of an adjustable damper boom 10 in accordance with a preferred embodiment of the present invention.
  • the adjustable damping boom 10 can include a cylinder 2, an elongated boom 1 and a piston 3.
  • a cavity for housing the magnetorheological fluid is defined in the cylinder 2.
  • the bottom end of the elongated boom 1 is inserted into the cylinder 2 from the upper end of the cylinder 2 and is passed outward through the lower end of the cylinder 2.
  • the elongate boom 1 is reciprocable in the axial direction with respect to the cylinder block 2.
  • the piston 3 is disposed in the cavity of the cylinder block 2 and is fixedly sleeved on the elongate boom 1 which reciprocates in the axial direction with the elongate boom 1 in the cavity.
  • the piston 3 is provided with a coil 32 that generates a magnetic field when energized, and a liquid flow path 31 that penetrates the piston 3 in the axial direction.
  • the piston 3 can be made of a ferromagnetic material, and the coil 32 is wound inside the piston 3.
  • the magnetorheological fluid on the side of the piston 3 can flow to the other side of the piston 3 via the liquid flow path 31, thereby communicating the space on the upper and lower sides of the piston 3 through the liquid flow path 31.
  • the magnetorheological fluid in the chamber flows from the top to the bottom via the liquid flow passage 31; when the piston 3 moves downward in the cylinder 2, the magnetorheological fluid in the chamber Flows from the bottom to the top through the liquid flow path 31.
  • the coil 32 When the coil 32 is energized, a magnetic field is generated around it, and the viscosity of the magnetorheological fluid in the liquid flow path 31 is changed by the magnetic field.
  • the fluidity of the magnetorheological fluid in the liquid flow path 31 can be changed by changing the magnitude of the current in the coil 32, thereby changing the magnitude of the damping when the piston 3 moves.
  • a wire slot 34 is provided in the elongate boom 1 and the piston 3 for arranging wires for supplying power to the coil 32.
  • the wire slot 34 extends from the piston 3 to the top end of the elongated boom 1.
  • the top end of the elongate boom 1 is provided with a top mount 6 to hang the adjustable damper boom 10 on the hanger 111 of the casing 110.
  • the wires for supplying power to the coil 32 can be connected to the power source via the top mount 6.
  • the upper end of the cylinder block 2 is formed with an upwardly extending positioning portion 223 to cooperate with the shock absorbing seat 121 of the outer cylinder 120, so that the outer cylinder 120 is suspended by gravity on the adjustable damping boom 10.
  • the structure of the top mount 6 can be similar to that of the prior art boom, and the positioning portion 223 can be constructed similarly to the lower seat of the prior art boom.
  • the hanger 111 and the shock absorbing seat 121 have diameters respectively a through hole larger than the diameter of the elongated boom 1, the elongated boom 1 passes through the hanger and the shock absorbing seat, and the top mount 6 and the positioning portion 223 are respectively located outside the hanger 111 and the shock mount 121, thereby being outside
  • the cylinder 120 is attached to the suspension seat 111 and the shock absorbing seat 121 under the action of gravity.
  • the cylinder block 2 includes a sleeve 21 and an upper end cap 22 and a lower end cap 23 located at upper and lower ends of the sleeve 21 for sealing it.
  • the positioning portion 223 is formed on the upper end cover 22.
  • the center of the upper end cap 22 has a through hole to allow the elongate boom 1 to pass and reciprocate in the axial direction relative to the upper end cap 22.
  • the adjustable damping boom 10 further comprises a boom base 5 and a spring 4 fixed to the bottom end of the elongated boom 1; the spring 4 is at the bottom end of the elongated boom 1 Between the lower end of the cylinder block 2 (or the spring 4 between the boom base 5 and the lower end of the cylinder block 2) is sleeved on the elongated boom 1.
  • the spring 4 When the elongate boom 1 moves upward in the cylinder 2, the spring 4 is shortened; when the elongate boom 1 moves downward in the cylinder 2, the spring 4 is elongated.
  • the spring 4 facilitates the reciprocating motion of the elongated boom 1 and can further function as a shock absorber.
  • the adjustable damper hanger 10 of the embodiment of the present invention can be inserted from the upper end of the elongated boom 1 into the cylinder 2 from the upper end of the cylinder 2 and outwardly through the lower end of the cylinder 2, and can be moved up and down by the cylinder 2
  • the elongated boom 1 is preferably limited at both ends.
  • the elongated boom 1 drives the piston 3 to slide in the cylinder 2, the direction of movement of the elongated boom 1 is less likely to deviate, so that deflection deformation is less likely to occur, and the piston 3 is less likely to be deviated. Therefore, the present invention can ensure that the adjustable damping boom 10 has better shock absorption effect and has a long service life, and is particularly suitable for a wave washing machine.
  • the washing machine 100 includes, but is not limited to, a laundry device having only a washing and drying function, and a device having other functions, such as a washing and drying machine having a washing and drying function and a drying function. machine.
  • washing machine 100 is based on the actual use state of the washing machine 100. These terms are only for convenience of description and understanding of the technical solutions of the present invention, and do not indicate or imply that the device or component referred to has a specific orientation and a specific orientation. The construction and operation are therefore not to be construed as limiting the invention.

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Abstract

一种洗衣机（100），包括外筒（120）、可转动地设置于外筒（120）中的内筒（130）以及用于驱动内筒（130）转动的转动机构（800），转动机构（800）的转动轴（842）从外筒（120）的下方向上延伸至内筒（130）的底壁（130a），以带动内筒（130）转动；洗衣机（100）还包括：至少一个磁铁对，磁铁对包括外圈磁铁和在外圈磁铁的径向内侧与外圈磁铁相对设置的内圈磁铁，其中内圈磁铁设置于转动轴（842）上，且外圈磁铁设置于内筒（130）的底壁（130a）或外筒（120）的底壁（120a），以利用外圈磁铁和内圈磁铁之间的磁力减小内筒（130）或外筒（120）径向振动的幅度。从而有效地补偿由于内筒（130）中衣物偏心产生的振动，同时降低振动噪音，达到减振降噪的目的。

Description

洗衣机 技术领域
本发明涉及家用电器，特别是涉及一种洗衣机。
背景技术
我们日常生活中使用的波轮洗衣机，由于洗涤过程中存在洗涤物品偏心及系统共振等原因导致整个洗衣机振动较大，同时会产生较大的噪音，影响用户体验。现有技术中的波轮洗衣机通常采用若干个(通常为四个)吊杆将外筒悬挂固定在洗衣机的机壳内，内筒可旋转地设置于外筒中，以减小洗衣机工作过程中的振动，但效果并不是很明显。
发明内容
本发明的一个目的是针对现有技术存在的上述缺陷，提供一种利用新的技术手段实现减振降噪的洗衣机。
本发明的一个进一步的目的是要提供一种具有较好减震效果的洗衣机。
为了实现上述目的，本发明提供了一种洗衣机，包括外筒、可转动地设置于外筒中的内筒以及用于驱动内筒转动的转动机构，转动机构的转动轴从外筒的下方向上延伸至内筒的底壁，以带动内筒转动；
洗衣机还包括：
至少一个磁铁对，每个磁铁对包括外圈磁铁和在外圈磁铁的径向内侧与外圈磁铁相对设置的内圈磁铁，其中
内圈磁铁设置于转动轴上，且外圈磁铁设置于内筒的底壁或外筒的底壁，以利用外圈磁铁和内圈磁铁之间的磁力减小内筒或外筒径向振动的幅度。
可选地，至少一个磁铁对包括上部磁铁对，上部磁铁对包括设置在内筒底壁下表面的上部外圈磁铁和设置于转动轴上且与上部外圈磁铁相对的上部内圈磁铁，以利用上部外圈磁铁与上部内圈磁铁之间的磁力减小内筒径向振动的幅度。
可选地，至少一个磁铁对还包括下部磁铁对，下部磁铁对包括：设置在外筒底壁上表面的下部外圈磁铁和设置于转动轴上且与下部外圈磁铁相对的下部内圈磁铁，以利用下部外圈磁铁与下部内圈磁铁之间的磁力减小外筒径向振动的幅度。
可选地，下部外圈磁铁与上部外圈磁铁相对设置，下部外圈磁铁的上端面与上部外圈磁铁的下端面的极性相同，以利用下部外圈磁铁与上部外圈磁铁之间的磁性斥力使内筒支承于外筒中。
可选地，上部内圈磁铁和上部外圈磁铁均为永磁环；且
内筒的底壁下表面设置有法兰盘，法兰盘具有可供转动轴穿设于其中的通孔，转动轴与法兰盘形配连接，以通过法兰盘带动内筒转动；其中
上部外圈磁铁固定在法兰盘的下表面、并围绕在法兰盘的通孔周围。
可选地，上部内圈磁铁的上端面和上部外圈磁铁的上端面的极性相同，且上部内圈磁铁的下端面和上部外圈磁铁的下端面的极性相同，以利用上部内圈磁铁和上部外圈磁铁之间的磁性斥力减小内筒径向振动的幅度。
可选地，下部内圈磁铁和下部外圈磁铁均为永磁环；且
下部外圈磁铁固定在外筒的底壁上表面、并围绕在外筒底壁的中央轴孔周围。
可选地，下部内圈磁铁的上端面和下部外圈磁铁的上端面的极性相同，且下部内圈磁铁的下端面和下部外圈磁铁的下端面的极性相同，以利用下部内圈磁铁和下部外圈磁铁之间的磁性斥力减小外筒径向振动的幅度。
可选地，下部内圈磁铁和下部外圈磁铁与上部内圈磁铁和上部外圈磁铁均由同种永磁材料制成；
上部内圈磁铁和上部外圈磁铁的厚度相同；
上部内圈磁铁和上部外圈磁铁处于同一竖直高度；
下部内圈磁铁和下部外圈磁铁的厚度相同；
下部内圈磁铁和下部外圈磁铁处于同一竖直高度；且
下部外圈磁铁与上部外圈磁铁在水平面上的投影重合。
可选地，洗衣机，还包括：机壳和用于将外筒吊托于机壳内的多个可调阻尼吊杆，其中每个可调阻尼吊杆包括：
缸体，其内限定有用于容装磁流变液的腔体；
长形吊杆，其顶端设置有顶部安装座，以将可调阻尼吊杆吊挂在机壳的吊座上，其底端自缸体的上端插入缸体并经由缸体的下端向外穿出；
活塞，固定套设在位于腔体内的长形吊杆上，活塞上设有用于产生磁场的线圈以及沿轴向贯穿活塞以供磁流变液流通的液流通道，以及
弹簧，在长形吊杆的底端与缸体下端之间套设在长形吊杆上；
其中缸体上端形成有向上延伸的定位部，以与外筒的减震座相配合，从 而使外筒在重力作用下吊挂在可调阻尼吊杆上。
现有洗衣机高速脱水时，由于衣物的偏心，内筒和/或外筒会不确定地发生倾斜，导致内筒与外筒之间甚至外筒与机壳之间发生碰撞。本发明的洗衣机通过在内筒底壁和外筒底壁之间设置至少一个包括外圈磁铁和内圈磁铁的磁铁对，并进一步使内圈磁铁设置于带动内筒转动的转动轴上，外圈磁铁设置于内筒的底壁或外筒的底壁，从而可在由于内筒中衣物偏心导致内筒和/或外筒发生径向振动时，利用内圈磁铁和与其对应的外圈磁铁之间的磁力缓冲内筒和/或外筒的径向振动，减少内筒和/或外筒径向振动的幅度，从而有效地补偿由于内筒中衣物偏心产生的振动，同时降低振动噪音，达到减振降噪的目的。
进一步地，本发明的洗衣机通过在内筒底壁下表面和带动内筒转动的转动轴上分别设置上部外圈磁铁和上部内圈磁铁(即上部磁铁对)，从而可在由于内筒中衣物偏心导致内筒发生径向振动时，利用上部内圈磁铁与上部外圈磁铁之间的磁力(特别是排斥力)缓冲、平衡内筒的振动，减小内筒径向振动的幅度，从而有效地补偿由于内筒中衣物偏心产生的振动，同时降低振动噪音，达到减振降噪的目的。
进一步地，本发明的洗衣机通过在外筒底壁上表面和带动内筒转动的转动轴上分别设置下部外圈磁铁和下部内圈磁铁(即下部磁铁对)，从而内筒振动导致外筒发生径向振动时，利用下部内圈磁铁与下部外圈磁铁之间的磁力缓冲、平衡外筒的振动，减小外筒径向振动的幅度，并间接减小内筒的径向振动幅度，进一步降低振动噪音。
进一步地，本发明的洗衣机通过将上部外圈磁铁和下部外圈磁铁相对设置，且使下部外圈磁铁的上端面与上部外圈磁铁的下端面的极性相同，从而使得内筒靠上部外圈磁铁和下部外圈磁铁之间的斥力可转动地悬浮在外筒内部。本发明的洗衣机中，由于在内筒的底壁下表面和外筒的底壁上表面设置上部外圈磁铁和下部外圈磁铁，能够将内筒可转动地支承于外筒中、且使内筒及其内容装物的重力通过磁力直接作用在外筒的底壁上，从而减小了对连接内筒和转动机构的转动轴承的作用力，避免其产生疲劳失效，延长了其使用寿命，进而减小了洗衣机的成本。同时，由于内筒悬浮地支承于外筒中，减少了内筒和外筒之间的机械接触，当内筒和外筒之间具有沿轴向的相对运动时，上部外圈磁铁和下部外圈磁铁之间的磁性斥力能够起到缓冲作用，从 而在很大程度上减弱了洗衣机在洗衣和脱水甩干过程中的振动，且更进一步地降低了噪音。
根据下文结合附图对本发明具体实施例的详细描述，本领域技术人员将会更加明了本发明的上述以及其他目的、优点和特征。
附图说明
后文将参照附图以示例性而非限制性的方式详细描述本发明的一些具体实施例。附图中相同的附图标记标示了相同或类似的部件或部分。本领域技术人员应该理解，这些附图未必是按比例绘制的。附图中：
图1是根据本发明一个实施例的洗衣机的示意性结构图；
图2是根据本发明一个实施例的洗衣机的示意性剖视图，图中省略了机壳；
图3是图2所示D区域处的放大示意图；
图4是图3所示洗衣机中的法兰盘的示意性结构图；
图5是图1所示洗衣机中的平衡环的示意性透视图；
图6是图1所示洗衣机中的外筒的示意性结构图；
图7是图1所示洗衣机中的可调阻尼吊杆的示意性剖视图。
具体实施方式
图1是根据本发明一个实施例的洗衣机100的示意性结构图。参见图1，洗衣机100一般性地可包括机壳110，布置于机壳110内的外筒120，可转动地设置于外筒120中的内筒130，以及用于驱动内筒130转动的转动机构800。
图2是根据本发明一个实施例的洗衣机100的示意性剖视图，图中省略了机壳110；图3是图2所示D区域处的示意性放大图。如图2和图3所示，在一些实施例中，转动机构800可包括驱动电机830和具有行星轮和太阳轮的传动机构840，驱动电机830通过传动机构840驱动内筒130和波轮160沿相同或相反的方向转动。转动机构800设置于外筒120的底壁120a下方，转动机构800的转动轴842从外筒120的下方向上延伸至内筒130的底壁130a，以带动内筒130转动。本领域技术人员可以理解，转动轴842可直接带动内筒130转动，也可通过中间部件如后文提到的法兰盘170间接带动内筒130转动。在本文优选的实施例中，内筒130的底壁130a下表面设置有法兰盘170，转动轴842通过法兰盘170间接带动内筒130转动。
图4是图3所示洗衣机100中的法兰盘170的示意性结构图。法兰盘170 包括法兰盘本体172，其上开设有可供转动芯轴841穿设于其中的通孔171以及由法兰盘本体172向径向外侧凸出延伸的多个安装脚173。转动轴842与法兰盘170形配连接，以通过法兰盘170带动内筒130转动。每个安装脚173的远端均开设有螺丝孔，以通过螺丝将法兰盘170固定在内筒130的底壁130a上。
转动机构800的转动芯轴841可在转动轴842的内部从外筒120的下方伸入内筒130中，以带动设置在内筒130中的波轮160转动。转动芯轴841和转动轴842之间、转动轴842与外筒底壁120a的连接处可设置密封圈(图中未示出)。
特别地，在本发明中，洗衣机100还包括至少一个磁铁对。磁铁对包括外圈磁铁和在外圈磁铁的径向内侧与其相对设置的内圈磁铁；其中，内圈磁铁设置于转动轴842上，外圈磁铁设置于内筒130的底壁130a或外筒120的底壁120a上，从而利用内圈磁铁和外圈磁铁之间的磁力减小内筒130和/或外筒120径向振动的幅度。
现有洗衣机高速脱水时，由于衣物的偏心，内筒130和/或外筒120会不确定地发生倾斜，导致内筒130与外筒120之间甚至外筒120与机壳110之间发生碰撞。本发明的洗衣机100通过在内筒底壁130a和外筒底壁120a之间设置至少一个磁铁对，从而可在由于内筒中衣物偏心导致内筒130和/或外筒120发生径向振动时，利用内圈磁铁和外圈磁铁之间的磁力缓冲内筒130和/或外筒120的径向振动，减少内筒130和/或外筒120径向振动的幅度，从而有效地补偿由于内筒130中衣物偏心产生的振动，同时降低振动噪音，达到减振降噪的目的。
本领域技术人员可以理解，当在内筒底壁130a下表面和外筒底壁120a上表面之间设置多个磁铁对时，多个磁铁对中的任一磁铁对的内圈磁铁全部设置在转动轴842上；多个磁铁对中的全部外圈磁铁并不一定都设置在内筒130的底壁130a下表面或者都设置在外筒120的底壁120a上表面上。例如，在内筒底壁130a下表面和外筒底壁120a上表面之间设置两个磁铁对的实施例中，当其中一个磁铁对的外圈磁铁设置于内筒130的底壁130a下表面时，另一磁铁对的外圈磁铁可设置于内筒130的底壁130a下表面上，也可设置在外筒120的底壁120a上表面上。
在一些实施例中，磁铁对的内圈磁铁和外圈磁铁可由永磁材料制成，进 一步优选由钕铁硼磁材料制成。在替代性实施例中，磁铁对的内圈磁铁和外圈磁铁中的至少一个可为电磁铁。电磁铁可包括铁芯和缠绕在铁芯上的通电线圈。
在一些实施例中，磁铁对的内圈磁铁和外圈磁铁基本同心设置，且均基本与转动机构的转动轴842同心设置。本领域技术人员可以理解，基本同心设置可以理解为内圈磁铁的圆心与上部外圈磁铁的圆心基本重合，且与转动轴842的轴线基本重合。
参见图1至图3，在一些实施例中，前述至少一个磁铁对包括上部磁铁对。上部磁铁对包括设置在内筒130的底壁130a下表面的上部外圈磁铁139和设置于转动轴842上的上部内圈磁铁138，且上部内圈磁铁138与上部外圈磁铁139相对设置，以利用上部内圈磁铁138与上部外圈磁铁139之间的磁力减小内筒130径向振动的幅度。
上部内圈磁铁138可安装或固定在转动轴842上且贴近或邻近内筒130的底壁130a下表面，以与上部外圈磁铁139相对设置。
在一些实施例中，上部外圈磁铁139可设置在法兰盘170上，以间接地设置在内筒130的底壁130a下表面。在进一步的实施例中，上部内圈磁铁138和上部外圈磁铁139均为永磁环；且上部外圈磁铁139固定在法兰盘170的下表面上，并围绕在法兰盘170的通孔171周围。
在替代性实施例中，上部内圈磁铁138和上部外圈磁铁139可均为不连续的环形磁铁，即上部内圈磁铁138和上部外圈磁铁139均由在各自圆周上间隔设置的多个磁块组成。
在优选的实施例中，上部内圈磁铁138的上端面和上部外圈磁铁139的上端面的极性相同，且上部内圈磁铁138的下端面和上部外圈磁铁139的下端面的极性相同，以利用上部内圈磁铁138和上部外圈磁铁139之间的磁性斥力减小内筒130径向振动的幅度。本领域技术人员可以理解，极性相同即意味着两者均为N极或均为S极。
对于波轮洗衣机而言，内筒130中衣物偏心会导致内筒130和外筒120发生径向振动。当内筒130向一侧(如前、后、左或右)振动偏移时，上部外圈磁铁139和上部内圈磁铁138在该侧之间的间距会变小，由此导致上部外圈磁铁139和上部内圈磁铁138之间的斥力会增大，在斥力作用下会推动内筒130向相反方向移动，从而有效地补偿由于内筒130中衣物偏心产生的 振动，减小内筒130的振动幅度，缓冲其径向振动。
在优选的实施例中，上部内圈磁铁138和上部外圈磁铁139由同种永磁材料制成；上部内圈磁铁138和上部外圈磁铁139的厚度相同，且上部内圈磁铁138和上部外圈磁铁139处于同一竖直高度；以保证上部内圈磁铁138和上部外圈磁铁139严格相对设置，以较好地利用两者之间的磁力缓冲洗衣机内筒130的径向振动。
在一些实施例中，前述至少一个磁铁对还包括下部磁铁对。下部磁铁对包括设置在外筒120的底壁120a上表面的下部外圈磁铁129和设置于转动轴842上的下部内圈磁铁128。其中，下部内圈磁铁128与下部外圈磁铁129相对设置，以利用下部内圈磁铁128与下部外圈磁铁129之间的磁力减小外筒120径向振动的幅度。
下部内圈磁铁128可安装或固定在转动轴842上且贴近或邻近外筒120的底壁120a上表面，以与下部外圈磁铁129相对设置。
在进一步的实施例中，下部内圈磁铁128和下部外圈磁铁129均为永磁环；且下部外圈磁铁129固定在外筒120的底壁120a的上表面，并围绕在外筒底壁120a的中央轴孔周围。
在优选的实施例中，下部内圈磁铁128的上端面和下部外圈磁铁129的上端面的极性相同，且下部内圈磁铁128的下端面和下部外圈磁铁129的下端面的极性相同，以利用下部内圈磁铁128和下部外圈磁铁129之间的磁性斥力减小外筒120径向振动的幅度。
在进一步的实施例中，下部内圈磁铁128和下部外圈磁铁129均由同种永磁材料制成。下部内圈磁铁128和下部外圈磁铁129的厚度相同，下部内圈磁铁128和下部外圈磁铁129处于同一竖直高度；以保证下部内圈磁铁128和下部外圈磁铁129严格相对设置，从而更好地利用两者之间的磁力缓冲洗衣机外筒120的径向振动。
在本发明优选实施例中，下部外圈磁铁129与上部外圈磁铁139相对设置，且下部外圈磁铁129与上部外圈磁铁139的相对的两个表面的极性相同，以利用下部外圈磁铁129与上部外圈磁铁139之间的磁性斥力使内筒130支承于外筒120中。容易理解，前述“下部外圈磁铁129与上部外圈磁铁139相对设置”也就是下部外圈磁铁129的上端面与上部外圈磁铁139的下端面相对设置，这意味着下部外圈磁铁129与上部外圈磁铁139在水平面上的投 影至少部分重合，以使下部外圈磁铁129与上部外圈磁铁139之间存在较大的斥力将内筒130悬浮支承。
也就是说，上部外圈磁铁139依靠其与下部外圈磁铁129的磁性斥力悬浮于下部外圈磁铁129之上，在上部外圈磁铁139和下部外圈磁铁129之间的磁性斥力作用下，上部外圈磁铁139可通过内筒底壁130a对内筒130产生向上的支撑力，从而克服内筒130自身的重力和其内容装物的重力使内筒130悬浮地支承于外筒120中，从而在内筒130转动时不与外筒120接触，避免内筒130和外筒120之间产生机械摩擦，从而有效地起到减振降噪的效果。其中内筒130自身的重力和其内容装物的重力可通过上部外圈磁铁139和下部外圈磁铁129直接作用在外筒底壁120a上。上文的洗衣机100也可称之为磁悬浮洗衣机。
本领域技术人员可以理解，利用下部外圈磁铁129与上部外圈磁铁139之间的磁性斥力使内筒130支承于外筒120中，相当于在内筒130和外筒120之间增加了一个弹性装置，以缓冲洗衣机100工作过程中内外筒之间机械振动的传递。
本发明通过在转动轴842上设置上部内圈磁铁138和下部内圈磁铁128，且在内筒底壁130a下表面和外筒底壁120a上表面分别设置上部外圈磁铁139和下部外圈磁铁129，以依靠上部内圈磁铁138和上部外圈磁铁139、下部内圈磁铁128和下部外圈磁铁129之间的磁力减小内筒和外筒径向振动幅度；通过将上部外圈磁铁139和下部外圈磁铁129相对设置且使其相对端面的极性相同，以依靠两者之间的斥力为内筒130提供支撑力。本发明将上部内圈磁铁138、下部内圈磁铁128、上部外圈磁铁139和下部外圈磁铁129结合形成有机整体，既可以实现轴向的振动缓冲又可以实现径向的振动约束，具有意料不到的优异减震效果。
在一些实施例中，下部内圈磁铁128和下部外圈磁铁129与上部内圈磁铁138和上部外圈磁铁139均由同种永磁材料制成。进一步地，可使下部外圈磁铁129与上部外圈磁铁139在水平面上的投影基本重合；即下部外圈磁铁129的内径与上部外圈磁铁139的内径尺寸基本相同，下部外圈磁铁129的外径与上部外圈磁铁139的外径尺寸基本相同，且下部外圈磁铁129与上部外圈磁铁139基本同轴线设置，以保证下部外圈磁铁129与上部外圈磁铁139严格地相对设置，使得内筒130能够更平稳地悬浮在外筒120内部。
在进一步优选的实施例中，下部外圈磁铁129和上部外圈磁铁139之间的间距为1cm-2cm左右，下部外圈磁铁129和上部外圈磁铁139之间的斥力为280N-350N左右，在此范围内选取的斥力大小足可以将盛满衣物和水的内筒130平稳浮起。
本领域技术人员容易理解，在本发明优选的实施例中，洗衣机100同时包括上部磁铁对和下部磁铁对。在替代性实施例中，洗衣机100可仅包括上部磁铁对或下部磁铁对。
此外，本发明的发明人发现，对于仅利用上下相对设置的两个磁环(简称上下磁铁)之间的斥力实现将内筒130支承于外筒120中的磁悬浮洗衣机而言，由于其依靠上下磁铁之间的斥力将内筒130悬浮于外筒120之上，从而导致内筒130在高速旋转时失去径向约束，从而容易发生径向晃动。因此，可在磁悬浮洗衣机中增设一个或两个设置在旋转轴上的内圈磁铁，以与原有的上下磁环形成一个或两个磁环对，缓解内筒和/或外筒的径向振动。
在本发明的一些实施例中，洗衣机100还包括设置于内筒130顶部的平衡环900。图5是图1所示洗衣机100中的平衡环900的示意性透视图。如图5所示，平衡环900包括其内限定有用于容装平衡介质的环形腔室920的壳体91和设置在环形腔室920中的至少一个弧型隔板92。每个弧型隔板92自环形腔室920的内周壁902沿弧型延伸至其外周壁901，每个弧型隔板92开设有供平衡介质在环形腔室920中流动的液流通孔(图中未示出)。平衡介质可为盐水，或其他合适的流体。相比平面型隔板，本发明实施例的弧型隔板92有利于减小平衡环900内部平衡介质流动阻力。
特别地，每个弧型隔板92在其外侧端处沿其延伸方向的切线S1与环形腔室920的外周壁901在该外侧端处沿转动方向A1的切线S2间的夹角θ为锐角。其中转动方向A1即是洗衣机100处于甩干操作时，与其内筒130(或者说平衡环900)的转动方向A2相反的旋转方向。本发明实施例中弧型隔板92在其外侧端处沿其延伸方向的切线S1，可以理解为顺着弧型隔板92的延伸方向延伸的切线，即图5中的切线S1、S1′、S1″。环形腔室920的外周壁901在该外侧端处沿转动方向A1的切线S2，可以理解为相对于弧型隔板92的延伸方向，或者说相对于弧型隔板92在其外侧端处沿其延伸方向的切线，外周壁901在该外侧端处朝转动方向A1延伸的切线；又或者说切线S2为环形腔室920的外周壁901在该外侧端处的切线中朝向第一转动 方向A1的区段，即图5中的切线S2、S2′、S2″。
由此，能够在洗衣机100执行脱水甩干时，减小平衡环900内部平衡介质流动阻力，缩短环形腔室920中的平衡介质到达环形腔室920外周壁901的时间。从而，平衡介质会沿着弧型隔板92迅速集中到偏心力的对面，实现偏心自补偿，快速平衡内筒130旋转产生的偏心。
在本发明的一些实施例中，环形内腔920中还设置有多个平面型隔板(图中未示出)，其与多个弧形隔板92间隔设置。
在进一步的实施例中，每个弧型隔板92在其外侧端处沿其延伸方向的切线S1与环形腔室920的外周壁901在该外侧端处沿旋转方向A1的切线S2间的夹角θ为30-60°，这样可进一步缩短环形腔室920中的平衡介质到达外周壁901的时间，快速起到平衡内筒130旋转产生的偏心的作用。
进一步地，每个弧型隔板92在其延伸长度上的每一位点沿其延伸方向的切线与经过该位点且与环形腔室920的内周壁902同心的圆周(或者说该位点所处的与环形腔室920的内周壁902同心的圆周)在该位点处沿转动方向A1的切线间的夹角为锐角或为0°角(或者说两者之间的夹角小于90°)。通过这样设置，可使平衡介质沿旋转方向A2转动时，在自环形腔室920的内周壁902向外周壁901流动的过程中受到的阻力均较小，从而进一步缩短到达外周壁901的时间。
在优选的实施例中，平衡环900中弧型隔板92的数量为8-12个，优选为10个。在这样的实施例中，平衡环900有利于在洗衣机100脱水甩干阶段内筒130转动时将平衡介质保持在最大偏心部的径向相对位置部，从而可有效抑制低速转动时的偏心振动问题。
测试表明，相比现有技术中的全部采用径向隔板的平衡环，本发明的平衡环900在内筒130转速相对较低时即可起到平衡作用。换句话说，现有技术中的平衡环需要内筒130的转速达到一定转速阈值时才可起到平衡作用，而对于本发明实施例，在内筒130的转速处于低于前述转速阈值的一定转速范围内时，平衡环900即可起到平衡作用，从而使得根据本发明实施例的洗衣机100能够在其内筒130进行脱水甩干操作初期具有较小的振动幅度。
在波轮洗衣机中，外筒120通常由多个吊杆吊托于机壳110内。参见图1和图6，与现有技术中的波轮洗衣机类似，在本发明实施例中，机壳110的周向内壁分布有多个吊座111，外筒120周向外壁的下部分布有多个减震座 121，用于分别与多个吊杆相连接。通常吊座111和减震座121的数量均为4个，沿外筒120圆周均匀径向分布，使4个吊杆均匀受力。
特别地，本发明实施例中的吊杆优选为可通过改变磁场大小实现调节阻尼大小的可调阻尼吊杆10。图7是本发明优选实施例的可调阻尼吊杆10的示意性剖视图。参见图7，可调阻尼吊杆10可包括缸体2，长形吊杆1和活塞3。缸体2内限定有用于容装磁流变液的腔体。长形吊杆1的底端自缸体2的上端插入缸体2并经由缸体2的下端向外穿出。长形吊杆1可相对于缸体2沿轴向方向往复运动。活塞3设置在缸体2的腔体中，且固定套设在长形吊杆1上，其可随长形吊杆1在腔体内沿轴向方向往复运动。
活塞3上设有可在通电时产生磁场的线圈32以及沿轴向贯穿活塞3的液流通道31。活塞3可由铁磁材料制成，线圈32卷绕在活塞3的内部。活塞3一侧的磁流变液可经由液流通道31流向活塞3的另一侧，从而通过液流通道31使活塞3上下两侧的空间连通。当活塞3在缸体2中向上运动时，腔体内的磁流变液经由液流通道31自上向下流动；当活塞3在缸体2中向下运动时，腔体内的磁流变液经由液流通道31自下向上流动。当线圈32通电时，会在其周围产生磁场，液流通道31中磁流变液受到磁场作用后，其粘度会发生变化。可以通过改变线圈32中电流的大小改变液流通道31中磁流变液的流动性，从而改变活塞3运动时的阻尼大小。由此，可在洗衣机100工作于不同负载的情况下，提供不同黏性阻尼力，从而可实现洗衣机100在大负载脱水启动时低转速共振区的振动在大阻尼的情况下迅速衰减；而在高速脱水阶段轻负载时，在小阻尼情况下对外筒120的振动产生有效的隔离，不至于使振动传递到洗衣机100的机壳110上来，从而减小机壳110的振幅，达到保证洗衣机100在各种负载下的整个脱水甩干过程平稳运行。
长形吊杆1和活塞3中设置有线槽34，用于布置向线圈32供电的导线。线槽34自活塞3延伸至长形吊杆1的顶端。
长形吊杆1的顶端设置有顶部安装座6，以将可调阻尼吊杆10吊挂在机壳110的吊座111上。用于向线圈32供电的导线可经由顶部安装座6与电源连接。缸体2上端形成有向上延伸的定位部223，以与外筒120的减震座121相配合，从而使外筒120在重力作用下吊挂在可调阻尼吊杆10上。顶部安装座6的结构可与现有技术中吊杆的上球座类似，定位部223的结构可与现有技术中吊杆的下球座类似。其中吊座111和减震座121上分别开有直径 大于长形吊杆1直径的通孔，长形吊杆1穿过吊座和减震座，且使得顶部安装座6和定位部223分别位于吊座111和减震座121的外侧，从而在外筒120重力作用下分别与吊座111和减震座121贴合。
在一些实施例中，缸体2包括筒套21，和位于筒套21上下两端用以将其密封的上端盖22和下端盖23。定位部223形成在上端盖22上。上端盖22的中心具有通孔，以允许长形吊杆1通过且可相对于上端盖22沿轴向方向往复运动。
在进一步的实施例中，可调阻尼吊杆10还包括吊杆座5和弹簧4，吊杆座5固设于长形吊杆1的底端；弹簧4在长形吊杆1的底端与缸体2下端之间(或者说弹簧4在吊杆座5与缸体2下端之间)套设在长形吊杆1上。当长形吊杆1在缸体2内向上运动时，弹簧4缩短；当长形吊杆1在缸体2内向下运动时，弹簧4伸长。弹簧4有利于长形吊杆1的往复运动，可进一步起到减震的作用。
本发明实施例的可调阻尼吊杆10，由于其长形吊杆1的底端自缸体2的上端插入缸体2并经由缸体2的下端向外穿出，可由缸体2的上下两端较好地对长形吊杆1进行限位。在长形吊杆1带动活塞3在缸体2中滑动时，长形吊杆1的运动方向不易发生偏离，从而不易产生挠曲变形，同时活塞3也不易发生偏缸。因此，本发明可保证可调阻尼吊杆10具有较好的减震效果，同时具有较长的使用寿命，特别适用于波轮洗衣机。
本领域技术人员应理解，本发明所涉及的洗衣机100包括但不限于仅具有洗涤甩干功能的洗衣设备，还包括具有其他功能的装置，例如具有洗涤甩干功能和干衣功能的洗干衣机。
本领域技术人员还应理解，本发明实施例中所称的“上”、“下”、“顶”、“底”、“竖直”、“水平”等用于表示方位或位置关系的用语是以洗衣机100的实际使用状态为基准而言的，这些用语仅是为了便于描述和理解本发明的技术方案，而不是指示或暗示所指的装置或部件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
至此，本领域技术人员应认识到，虽然本文已详尽示出和描述了本发明的多个示例性实施例，但是，在不脱离本发明精神和范围的情况下，仍可根据本发明公开的内容直接确定或推导出符合本发明原理的许多其他变型或修改。因此，本发明的范围应被理解和认定为覆盖了所有这些其他变型或修改。

Claims (10)

  1. 一种洗衣机，包括外筒、可转动地设置于所述外筒中的内筒以及用于驱动所述内筒转动的转动机构，所述转动机构的转动轴从所述外筒的下方向上延伸至所述内筒的底壁，以带动所述内筒转动；
    所述洗衣机还包括：
    至少一个磁铁对，每个所述磁铁对包括外圈磁铁和在所述外圈磁铁的径向内侧与所述外圈磁铁相对设置的内圈磁铁，其中
    所述内圈磁铁设置于所述转动轴上，且所述外圈磁铁设置于所述内筒的底壁或所述外筒的底壁，以利用所述外圈磁铁和所述内圈磁铁之间的磁力减小所述内筒或所述外筒径向振动的幅度。
  2. 根据权利要求1所述的洗衣机，其中
    所述至少一个磁铁对包括上部磁铁对，所述上部磁铁对包括设置在所述内筒底壁下表面的上部外圈磁铁和设置于所述转动轴上且与所述上部外圈磁铁相对的上部内圈磁铁，以利用所述上部外圈磁铁与所述上部内圈磁铁之间的磁力减小所述内筒径向振动的幅度。
  3. 根据权利要求2所述的洗衣机，其中
    所述至少一个磁铁对还包括下部磁铁对，所述下部磁铁对包括：设置在所述外筒底壁上表面的下部外圈磁铁和设置于所述转动轴上且与所述下部外圈磁铁相对的下部内圈磁铁，以利用所述下部外圈磁铁与所述下部内圈磁铁之间的磁力减小所述外筒径向振动的幅度。
  4. 根据权利要求3所述的洗衣机，其中
    所述下部外圈磁铁与所述上部外圈磁铁相对设置，所述下部外圈磁铁的上端面与所述上部外圈磁铁的下端面的极性相同，以利用所述下部外圈磁铁与所述上部外圈磁铁之间的磁性斥力使所述内筒支承于所述外筒中。
  5. 根据权利要求4所述的洗衣机，其中
    所述上部内圈磁铁和所述上部外圈磁铁均为永磁环；且
    所述内筒的底壁下表面设置有法兰盘，所述法兰盘具有可供所述转动轴 穿设于其中的通孔，所述转动轴与所述法兰盘形配连接，以通过所述法兰盘带动所述内筒转动；其中
    所述上部外圈磁铁固定在所述法兰盘的下表面、并围绕在所述法兰盘的通孔周围。
  6. 根据权利要求5所述的洗衣机，其中
    所述上部内圈磁铁的上端面和所述上部外圈磁铁的上端面的极性相同，且所述上部内圈磁铁的下端面和所述上部外圈磁铁的下端面的极性相同，以利用所述上部内圈磁铁和所述上部外圈磁铁之间的磁性斥力减小所述内筒径向振动的幅度。
  7. 根据权利要求6所述的洗衣机，其中
    所述下部内圈磁铁和所述下部外圈磁铁均为永磁环；且
    所述下部外圈磁铁固定在所述外筒的底壁上表面、并围绕在所述外筒底壁的中央轴孔周围。
  8. 根据权利要求7所述的洗衣机，其中
    所述下部内圈磁铁的上端面和所述下部外圈磁铁的上端面的极性相同，且所述下部内圈磁铁的下端面和所述下部外圈磁铁的下端面的极性相同，以利用所述下部内圈磁铁和所述下部外圈磁铁之间的磁性斥力减小所述外筒径向振动的幅度。
  9. 根据权利要求8所述的洗衣机，其中所述下部内圈磁铁和所述下部外圈磁铁与所述上部内圈磁铁和所述上部外圈磁铁均由同种永磁材料制成；
    所述上部内圈磁铁和所述上部外圈磁铁的厚度相同；
    所述上部内圈磁铁和所述上部外圈磁铁处于同一竖直高度；
    所述下部内圈磁铁和所述下部外圈磁铁的厚度相同；
    所述下部内圈磁铁和所述下部外圈磁铁处于同一竖直高度；且
    所述下部外圈磁铁与所述上部外圈磁铁在水平面上的投影重合。
  10. 根据权利要求1所述的洗衣机，还包括：机壳和用于将所述外筒吊托于所述机壳内的多个可调阻尼吊杆，其中每个所述可调阻尼吊杆包括：
    缸体，其内限定有用于容装磁流变液的腔体；
    长形吊杆，其顶端设置有顶部安装座，以将所述可调阻尼吊杆吊挂在所述机壳的吊座上，其底端自所述缸体的上端插入所述缸体并经由所述缸体的下端向外穿出；
    活塞，固定套设在位于所述腔体内的长形吊杆上，所述活塞上设有用于产生磁场的线圈以及沿轴向贯穿所述活塞以供磁流变液流通的液流通道，以及
    弹簧，在所述长形吊杆的底端与所述缸体下端之间套设在所述长形吊杆上；
    其中所述缸体上端形成有向上延伸的定位部，以与所述外筒的减震座相配合，从而使所述外筒在重力作用下吊挂在所述可调阻尼吊杆上。
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