EP2444540A1 - Trommelwaschmaschine - Google Patents

Trommelwaschmaschine Download PDF

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Publication number
EP2444540A1
EP2444540A1 EP11185406A EP11185406A EP2444540A1 EP 2444540 A1 EP2444540 A1 EP 2444540A1 EP 11185406 A EP11185406 A EP 11185406A EP 11185406 A EP11185406 A EP 11185406A EP 2444540 A1 EP2444540 A1 EP 2444540A1
Authority
EP
European Patent Office
Prior art keywords
motor
washing machine
drum
belt
driving pulley
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11185406A
Other languages
English (en)
French (fr)
Inventor
Kenji Terai
Kouichi Yagi
Katsunori Yamamoto
Shinji Matsuoka
Yutaka Miki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Original Assignee
Panasonic Corp
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 Panasonic Corp filed Critical Panasonic Corp
Publication of EP2444540A1 publication Critical patent/EP2444540A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30—Driving arrangements 

Definitions

  • the present invention relates to a configuration of a driving pulley and a belt at a motor that drives a rotary drum of a drum-type washing machine.
  • Patent Literature 1 A conventional configuration for driving a rotary drum of a drum-type washing machine is disclosed in, for example, Japanese Patent Application Unexamined Publication No. 2009-78056 (hereinafter, referred to as "Patent Literature 1").
  • rotation of a motor fixed to an outer bottom portion of a water tank is transmitted from a driving pulley formed on a motor shaft or a driving pulley fixed to a motor shaft to a driven pulley directly connected to the rotary drum via a belt.
  • FIG. 4 is a longitudinal sectional view of the conventional drum-type washing machine.
  • the conventional drum-type washing machine has washing machine main body 31 including water tank 32.
  • Water tank 32 includes rotary drum 33 that is axially supported by rotation shaft 35 rotatably forwardly or reversely.
  • An outer peripheral wall of rotary drum 33 is provided with a large number of small holes 41 for extracting water during a dehydrating operation, and an inner peripheral wall of rotary drum 33 is provided with a plurality of baffles 36 for agitating laundry.
  • Baffles 36 provided on rotary drum 33 agitate the laundry by low-speed forward or reverse rotation (for example, 50 rpm) during a washing process, and it extracts water from the laundry by centrifugation at a high-speed one-way rotation (for example, 1000 rpm) during a dehydrating process.
  • rotation shaft 35 is fixed to the right end of rotary drum 33 shown in FIG. 4
  • driven pulley 37 is fixed to the right end of rotation shaft 35.
  • Motor 20 is provided on the outer bottom portion of water tank 32.
  • a plurality of streams of V grooves 43 (which are described below with reference to FIG. 5 ) are formed on an end of motor shaft 39 of motor 20.
  • Belt 38 having a plurality of streams of V-shaped grooves 42 (which are described below with reference to FIG. 5 ) is extended between motor shaft 39 and driven pulley 37 in motor 20.
  • Controller 34 incorporates, for example, micro-computer (not shown) that receives an input signal from, for example, a switch (not shown). Controller 34 controls a series of processes including the washing process to the dehydrating process, and also carries out switching control of motor 20 between a low-speed rotation in the washing process and a high-speed rotation in the dehydrating process.
  • FIG. 5 is an enlarged view of a principal part to illustrate a configuration of the vicinity (part B in FIG. 4 ) of the motor shaft of the motor of the conventional drum-type washing machine.
  • V grooves 43 are formed in such a manner that outer diameter D2 of the streams of V grooves 43 of motor shaft 39 is substantially the same as (including identical to) diameter D1 of motor shaft 39. Therefore, it is not necessary to install a driving pulley by using another member on motor shaft 39, so that a pulley at the driving side can be achieved by motor shaft 39 having a smaller diameter. As a result, even if the outer diameter of driven pulley 37 is small, the speed reduction ratio (diameter of driven pulley 37 / diameter of motor shaft 39) of motor shaft 39 and driven pulley 37 can be increased.
  • a conventional drum-type washing machine has a configuration in which the rotation of motor 20 is transmitted to rotary drum 33 via belt 38 at one speed reduction ratio by carrying out switching control of the number of rotations of motor 20.
  • rotary drum 33 can be rotationally driven during the washing process and the dehydrating process.
  • belt 38 is mainly formed of synthetic rubber having heat resistance, abrasion resistance, and the like.
  • Belt 38 has a large frictional force. Therefore, V-shaped groove 42 of belt 38 and V groove 43 provided in the outer periphery in the vicinity of the tip part of motor shaft 39 adhere to and are separated from each other repeatedly at a high circumferential velocity. As a result, a sliding noise due to high speed adhesion and separation occurs, and the sound as an unusual noise gives an uncomfortable feeling to a user during a washing operation.
  • water (water vapor) contained in the air inside washing machine main body 31 may be coagulated (dew condensation) on the outer wall of water tank 32 and the like, and may drop and adhere to a sliding part between V-shaped groove 42 of belt 38 and V groove 43 of motor shaft 39.
  • the circumferential velocity of V-shaped groove 42 of belt 38 and V groove 43 of motor shaft 39 is low, even if a small amount of water adheres to the sliding part, it does not have a large effect on the rotation transmission force to rotary drum 33.
  • the pulley at the driving side is a motor shaft, since the diameter of the motor shaft is small, the circumferential velocity becomes fast.
  • a drum-type washing machine of the present invention has a configuration including a water tank supported in a washing machine main body, a rotary drum supported in the water tank, a motor fixed to an outer bottom portion of the water tank, a driving pulley provided on one end of a motor shaft of the motor, a rotation shaft having one end fixed to the rotary drum, a driven pulley securely installed on the other end of the rotation shaft, and a belt that transmits rotation of the motor to the driven pulley.
  • a waterproof cover covering around the driving pulley is fixed to the motor.
  • FIG. 1 is a longitudinal sectional view showing a drum-type washing machine in accordance with an exemplary embodiment of the present invention.
  • a drum-type washing machine has washing machine main body 31 including water tank 32.
  • Water tank 32 includes rotary drum 33 that is axially supported by rotation shaft 35 rotatably forwardly or reversely.
  • An outer peripheral wall of rotary drum 33 is provided with a large number of small holes 41 for extracting water during a dehydrating operation, and an inner peripheral wall of rotary drum 33 is provided with a plurality of baffles 36 for agitating laundry.
  • Baffles 36 provided on rotary drum 33 agitate laundry by low-speed forward or reverse rotation (for example, 50 rpm) during a washing process, and it extracts water from the laundry by centrifugation at a high-speed one-way rotation (for example, 1000 rpm) during a dehydrating process.
  • Rotary drum 33 is rotationally driven via motor 20 provided on the outer bottom portion of water tank 32 by the below-mentioned mechanism. At this time, at the tip part of a motor shaft (not shown in FIG. 1 ) of motor 20, waterproof cover 1 is placed.
  • FIG. 2 is an enlarged view of a principal part to illustrate a configuration of the vicinity (part A in FIG. 1 ) of the motor shaft of the motor of the drum-type washing machine.
  • FIG. 3 is a sectional view taken on line 3-3 of the drum-type washing machine from the direction B shown in FIG. 2 .
  • waterproof cover 1 that covers around driving pulley 2 is provided.
  • Waterproof cover 1 is formed of, for example, a plastic molding member, and in, for example, a cylindrical shape having a substantially rectangular U-shaped (including rectangular U-shaped) section and having openings 3 in positions through which belt 38 passes.
  • Waterproof cover 1 has a plurality of hooks 4 having, for example, an L-shape at motor 20 side. Hook 4 is attached to be engaged with small hole 8 of front plate 5 of motor 20, whereby waterproof cover 1 and the motor are positioned. Furthermore, at the motor 20 side of the outer periphery of cylinder part 1a of waterproof cover 1, a plurality of mounting seats 6 are formed integrally with cylinder part 1a, and screwed to front plate 5 of motor 20 with, for example, machine screw 7.
  • noise-absorbing material 9 such as felt made of, for example, non-woven fabric, foam, and a porous material is placed by fitting, or adhesive bonding.
  • opening 3 to allow belt 38 to pass through is provided in two places. Consequently, noise-absorbing material 9 is placed on all over the inner peripheral surface of cylinder part 1a of waterproof cover 1 except for of two openings 3.
  • rib body 11 is integrally provided in the same direction as the extending direction of motor shaft 39. This can prevent water, which is condensed (dew condensation) on the water tank and the like and which drops on upper surface 12 of waterproof cover 1, from entering a sliding part between V-shaped groove 42 of belt 38 and V groove 43 of driving pulley 2 inside waterproof cover 1 from opening 3.
  • an unusual noise such as a sliding noise occurring in the sliding part between belt 38 and driving pulley 2 by the rotation of motor 20 can be cut off (shielded) by waterproof cover 1.
  • an unusual noise such as a sliding noise that propagates to the outside of washing machine main body 31.
  • a drum-type washing machine of this exemplary embodiment by placing noise-absorbing material 9 on the inner periphery of waterproof cover 1, an unusual noise such as a sliding noise can be absorbed, or generation of acoustic echo in waterproof cover 1 can be prevented. As a result, propagation of the unusual noise to the outside of washing machine main body 31 can be remarkably reduced.
  • noise-absorbing material 9 all over the inner periphery of waterproof cover 1 except for openings 3 to allow belt 38 to pass through, an unusual noise such as a sliding noise can be effectively absorbed, and occurrence of acoustic echo and the like can be remarkably suppressed.
  • the periphery of the sliding part between V-shaped groove 42 of belt 38 and V groove 43 of driving pulley 2, except for openings 3, is covered with waterproof cover 1. Therefore, it is possible to effectively reduce the entering of water, which is condensed (dew condensation) and drops on the outer wall of water tank 32 and the like, into the sliding part. This makes it possible to prevent the occurrence of "slipping" between V-shaped groove 42 of belt 38 and V groove 43 of driving pulley 2. As a result, it is possible to prevent the deterioration of washing performance due to the change of the number of rotations of rotary drum 33 in the washing process and the dehydrating process.
  • the present invention has a configuration including a water tank supported in a washing machine main body, a rotary drum supported in the water tank, a motor fixed to an outer bottom portion of the water tank, a driving pulley provided on one end of a motor shaft of the motor, a rotation shaft having one end fixed to the rotary drum, a driven pulley securely installed on the other end of the rotation shaft, and a belt that transmits rotation of the motor to the driven pulley.
  • a waterproof cover covering around the driving pulley is fixed to the motor. This makes it possible to prevent an unusual noise occurring due to the sliding friction between the driving pulley and the belt from dispersing to the outside, and to prevent the occurrence of "slipping" due to water attached to a sliding part between the driving pulley and the belt.
  • the present invention has a configuration in which the waterproof cover is provided a noise-absorbing material is placed on an inner periphery thereof. This makes it possible to effectively absorb an unusual noise occurring due to the sliding friction between the driving pulley and the belt and to remarkably reduce the dispersion of the noises to the outside.
  • the present invention has a configuration in which the noise-absorbing material is placed around the driving pulley except for an opening for the belt to pass through. This makes it possible to effectively absorb an unusual noise occurring due to the sliding friction between the driving pulley and the belt.
  • the noise-absorbing material includes felt.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP11185406A 2010-10-20 2011-10-17 Trommelwaschmaschine Withdrawn EP2444540A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2010235327A JP2012085838A (ja) 2010-10-20 2010-10-20 ドラム式洗濯機

Publications (1)

Publication Number Publication Date
EP2444540A1 true EP2444540A1 (de) 2012-04-25

Family

ID=44785721

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11185406A Withdrawn EP2444540A1 (de) 2010-10-20 2011-10-17 Trommelwaschmaschine

Country Status (4)

Country Link
EP (1) EP2444540A1 (de)
JP (1) JP2012085838A (de)
CN (2) CN202359391U (de)
TW (1) TWI448599B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112642595A (zh) * 2020-12-04 2021-04-13 成都高分离心机有限公司 一种进料管结构、加工工艺及卧螺离心机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012085838A (ja) * 2010-10-20 2012-05-10 Panasonic Corp ドラム式洗濯機
CN105375678A (zh) * 2015-10-13 2016-03-02 佛山市威灵洗涤电机制造有限公司 用于洗衣机的电机组件及具有其的洗衣机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1878825A1 (de) * 2006-07-13 2008-01-16 IAR-SILTAL S.p.A. Wasch- und/oder Trockenmaschine zur Verwendung im Haushalt
JP2009078056A (ja) 2007-09-27 2009-04-16 Panasonic Corp ドラム式洗濯機
JP2011167222A (ja) * 2010-02-16 2011-09-01 Panasonic Corp 洗濯機

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT326956B (de) * 1972-11-10 1976-01-12 List Hans Brennkraftmaschine mit schalldammend verkleideter keilriemenscheibe
JPS5812638U (ja) * 1981-07-17 1983-01-26 日産自動車株式会社 クランクプ−リの遮音装置
JPS61204062U (de) * 1985-01-15 1986-12-22
JPS61265191A (ja) * 1985-05-20 1986-11-22 松下電器産業株式会社 洗濯機
JP2693275B2 (ja) * 1991-02-12 1997-12-24 シャープ株式会社 ドラム式洗濯乾燥機
CN2187621Y (zh) * 1992-08-29 1995-01-18 李增树 防锈蚀双桶洗衣机
JPH06300121A (ja) * 1993-04-16 1994-10-28 Brother Ind Ltd ベルト伝動装置の防音カバー
JP2012085838A (ja) * 2010-10-20 2012-05-10 Panasonic Corp ドラム式洗濯機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1878825A1 (de) * 2006-07-13 2008-01-16 IAR-SILTAL S.p.A. Wasch- und/oder Trockenmaschine zur Verwendung im Haushalt
JP2009078056A (ja) 2007-09-27 2009-04-16 Panasonic Corp ドラム式洗濯機
JP2011167222A (ja) * 2010-02-16 2011-09-01 Panasonic Corp 洗濯機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112642595A (zh) * 2020-12-04 2021-04-13 成都高分离心机有限公司 一种进料管结构、加工工艺及卧螺离心机

Also Published As

Publication number Publication date
TW201217597A (en) 2012-05-01
CN102454088A (zh) 2012-05-16
TWI448599B (zh) 2014-08-11
CN102454088B (zh) 2013-06-19
JP2012085838A (ja) 2012-05-10
CN202359391U (zh) 2012-08-01

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