Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
  • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
  • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
  • D06F37/22—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a horizontal axis
• • 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
  • D06F37/264—Tubs provided with reinforcing structures, e.g. ribs, inserts, braces
• • 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
  • D06F37/265—Counterweights mounted to the tub; Mountings therefor
• • 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
  • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
  • D06F39/12—Casings; Tubs
  • D06F39/125—Supporting arrangements for the casing, e.g. rollers or legs
• • 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
  • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
  • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
• • 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
  • F16F15/32—Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels
• • 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
  • F16F7/00—Vibration-dampers; Shock-absorbers
  • F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
  • F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
  • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Definitions

• the present invention relates to a washing machine, and more particularly, to a washing machine for reducing a vibration generating while operating the washing machine.
• FIG. 1 shows a vibration state of the side cabinet 16.
• the side cabinet 16 has a natural frequency according to a shape and rigidity. If a frequency of a vibration generating by a rotation of a drum (not shown) approaches the natural frequency, a vibration of the side cabinet 16 causes a large vibration, whereby noise is generated. Therefore, the vibration of the side cabinet 16 hinders stability of a product and generates noise.
• the present invention has been made in an effort to solve the above problems, and the present invention provides a washing machine for reducing a vibration generating while operating the same.
• a washing machine including: a cabinet; a tub provided within the cabinet and for storing washing water; and a dynamic vibration absorber whose one end is fixed to the cabinet and whose the other end forms a free end and for offsetting a vibration of the cabinet vibrated by a vibration of the tub.
• the dynamic vibration absorber may include a vibration member whose one end is fixed to the inside of the cabinet and whose the other end is extended to the inside of the cabinet. The other end of the vibration member may be extended to the downside of the inside of the cabinet.
• the dynamic vibration absorber may further include a mass member having a predetermined mass and coupled to the vibration member.
• the cabinet may include a side cabinet for defining the side of space in which the tub is disposed.
• the dynamic vibration absorber may have a natural frequency substantially identical to a natural frequency of the side cabinet.
• a plurality of dynamic vibration absorbers may be disposed.
• the plurality of dynamic vibration absorbers may have natural frequencies corresponding to a plurality of natural vibration modes of the side cabinet.
• the washing machine may further include a reinforcement member disposed at the inside of the side cabinet and for reinforcing rigidity of the side cabinet.
• the dynamic vibration absorber may damp a vibration of the cabinet by vibrating in a phase opposite to a vibration phase of the cabinet.
• the washing machine according to the present invention has the following effect.
• FIG. 1 is a partial perspective view illustrating a coupling structure of a spring and a side cabinet in a conventional washing machine
• FIG. 2 is a perspective view illustrating a vibration of a side cabinet of the washing machine of FIG. 1
• FIG. 3 is a cross-sectional view illustrating an inner structure of a washing machine according to an exemplary embodiment of the present invention
• FIG. 4 is a partial perspective view illustrating an upper part of a side cabinet of the washing machine of FIG. 3;
• FIG. 5 is a front view illustrating an upper part of the side cabinet taken along 'A' direction of FIG. 4;
• FIG. 6 is a graph illustrating a vibration displacement of a side cabinet according to a rotation of a motor in the washing machine of FIG. 2 and the washing machine of FIG. 3.
• a washing machine includes all appliances that can process the laundry such as a simple washing machine, a drying machine, and a dehydrator.
• a simple washing machine a washing machine
• a drying machine a drying machine
• a dehydrator a washing machine that can process the laundry
• the simple washing machine is described in detail.
• FIG. 3 is a cross-sectional view illustrating an inner structure of a washing machine
• FIG. 4 is a partial perspective view illustrating a part of an upside of a side cabinet 116 of the washing machine of FIG. 3.
• the washing machine 100 generally includes a cabinet 101, a drum 103, and a tub 102.
• the cabinet 101 forms an external appearance and defines an inner space for housing the drum 103 and the tub 102.
• the cabinet 101 includes a side cabinet 116 for forming a side surface and a base 101a for forming a floor surface.
• the tub 102 is provided within and fixed to the cabinet 1.
• the drum 103 is provided to rotate within the tub 102 and rotates the laundry and washing water by a lift 103a.
• a motor (not shown) is disposed at the rear side of the drum 103, and the motor (not shown) rotates the drum 103.
• the springs 105 for elastically supporting the tub 102 are disposed within the cabinet 101. One end of each spring 105 is coupled to the upside of the tub 102 and the other end thereof is coupled to the upside of the side cabinet 116. Therefore, the tub 102 is elastically suspended by the springs 105. Further, a damper 106 is disposed at the downside of the tub 102 and the dampers 106 damp a vibration of the tub 102.
• the washing machine 100 further includes a dynamic vibration absorber 120 for damping a vibration of the cabinet 101.
• the dynamic vibration absorber 120 damps a vibration of the side cabinet 116 by damping a vibration of the side cabinet 116 vibrated through the spring 105.
• One end of the dynamic vibration absorber 120 is fixed to a place vibrating integrally with the side cabinet 116 and the other end thereof forms a free end. That is, when the side cabinet 116 vibrates, the dynamic vibration absorber 120 vibrates together with the side cabinet 116, thereby offsetting a vibration of the side cabinet 116, so that a vibration of the side cabinet 116 is damped. Because the dynamic vibration absorber 120 has a natural frequency substantially identical to a natural frequency of the side cabinet 116, a damp effect of the vibration largely increases.
• FIG. 5 is a front view illustrating an upper part of the side cabinet taken along 'A' direction of FIG. 4.
• the dynamic vibration absorber 120 includes a vibration member 122 and a mass member 124.
• the vibration member 122 has a bar shape having a predetermined width. Further, the vibration member 122 is made of a metal material having predetermined elasticity so as to vibrate by a vibration applied to the side cabinet 116. However, the present invention is not limited thereto, and the vibration member 122 may be made of various materials.
• a natural frequency of the dynamic vibration absorber 120 changes according to a mass and rigidity. Therefore, the mass member 124 having a predetermined mass is disposed at a tip of the vibration member 122 so that the dynamic vibration absorber 120 may have a target natural frequency. However, when the target natural frequency is obtained with only the vibration member 122, a separate mass member may not be disposed.
• a reinforcement member 118 for reinforcing rigidity of the side cabinet 116 is fixed to the upper end of the side cabinet 116.
• the reinforcement member 118 is disposed in a length direction of the front and rear along the upper end of the side cabinet 116, and has a cross-sectional shape similar to a shape of Korean alphabet "D".
• the present invention is not limited thereto, and the reinforcement member 118 may have various shapes.
• one end of the vibration member 122 is coupled to a lower end of the inside of the reinforcement member 118 and the other end thereof is extended toward the downside of the inside of the cabinet 116.
• the present invention is not limited thereto, and one end of the vibration member 122 may be fixed to the reinforcement member 118 and the other end thereof may be extended toward the upside of the inside or a side surface of the side cabinet 116. Further, one end of the vibration member 122 may be directly coupled to the side cabinet 116 without a separate reinforcement member.
• the drum 103 rotates, and according to a rotation of the drum 103, the tub 102 vibrates, and the vibration is transmitted to the side cabinet 116 through the spring 105.
• the dynamic vibration absorber 120 coupled to the upside of the side cabinet 116 vibrates.
• the dynamic vibration absorber 120 vibrates in a direction opposite to a vibration direction of the side cabinet 116. That is, when the side cabinet 116 vibrates in a first direction (X direction), the vibrations member 122 vibrates in a second direction (-X direction), and when the side cabinet 116 vibrates in the second direction (-X direction), the vibration member 122 vibrates in the first direction (X direction). Therefore, because the dynamic vibration absorber 120 offsets a vibration of the side cabinet 116 while vibrating in a phase opposite to a vibration direction of the side cabinet 116, an entire vibration of the washing machine 100 reduces.
• FIG. 6 is a graph illustrating a relationship between a rotation speed of a motor (not shown) and a vibration of side cabinets (16, 116) in a conventional washing machine (washing machine of FIG. 1) and the washing machine 100 according to the present exemplary embodiment.
• a rotation speed of the motor approaches a resonance frequency of the side cabinet 16
• the side cabinet 16 of the conventional washing machine generates a resonance phenomenon, thereby largely increasing amplitude thereof.
• the dynamic vibration absorber 120 changes a resonance frequency of the washing machine 100. That is, as the dynamic vibration absorber 120 changes the resonance frequency to the outside of an operation vibration frequency range of the motor (not shown), a resonance phenomenon generating while operating the washing machine is prevented.
• the side cabinet 116 has one natural vibration mode. However, the side cabinet 116 may have a plurality of different natural vibration modes. In this case, if a plurality of dynamic vibration absorbers is provided in the side cabinet 116 and has natural frequencies corresponding to the plurality of natural vibration modes, a plurality of resonance phenomena generating while operating the washing machine can be effectively reduced.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Acoustics & Sound (AREA)
• Aviation & Aerospace Engineering (AREA)
• Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
• Vibration Prevention Devices (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=39364723

Family Applications (1)

Country Status (5)

Families Citing this family (11)

Family Cites Families (12)

• 2006
  • 2006-11-10 KR KR1020060111276A patent/KR20080042604A/ko not_active Ceased
• 2007
  • 2007-11-09 CN CNA2007800416227A patent/CN101535550A/zh active Pending
  • 2007-11-09 WO PCT/KR2007/005638 patent/WO2008056953A1/en not_active Ceased
  • 2007-11-09 US US12/514,218 patent/US20100037660A1/en not_active Abandoned
  • 2007-11-09 EP EP07833945.4A patent/EP2097577A4/de not_active Withdrawn

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