US20080256986A1 - Friction Damper Device for a Washing Machine - Google Patents

Friction Damper Device for a Washing Machine Download PDF

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Publication number
US20080256986A1
US20080256986A1 US11/664,225 US66422505A US2008256986A1 US 20080256986 A1 US20080256986 A1 US 20080256986A1 US 66422505 A US66422505 A US 66422505A US 2008256986 A1 US2008256986 A1 US 2008256986A1
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US
United States
Prior art keywords
piston rod
friction
damper device
friction lining
friction damper
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.)
Abandoned
Application number
US11/664,225
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English (en)
Inventor
Uwe Ackermann
Andreas Bohm
Rolf Schuck
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Assigned to BSH BOSCH UND SIEMENS HAUSGERAETE GMBH reassignment BSH BOSCH UND SIEMENS HAUSGERAETE GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BOHM, ANDREAS, SCHUCK, ROLF, ACKERMANN, UWE
Publication of US20080256986A1 publication Critical patent/US20080256986A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • F16F7/08—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other
    • F16F7/09—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other in dampers of the cylinder-and-piston type
    • 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

Definitions

  • This invention relates to a friction damper device for a washing machine in whose housing is arranged a washing unit with a tub, a washing drum which is rotationally mounted in the tub and a drive for the washing drum, the washing unit being supported in an elastic manner by at least one damper counter to the lower frame part of the housing.
  • washing unit which includes of a tub, a drive for the tub and a washing drum.
  • upright systems the washing unit is normally supported in an elastic manner by a plurality of spring legs relative to a lower frame part of the housing of the washing machine.
  • suspended systems i.e. mixed systems
  • the washing unit is suspended at a plurality of points on an upper frame part of the housing by means of springs and is mounted so that the vibrations are damped by means of dampers in respect of a lower frame part of the housing.
  • DE 30 43 550 C2 discloses a fully automatic drum washing machine designed for spinning, whose washing unit is supported on the machine base with sprung, damping spring legs. Each spring leg is fastened to the housing frame of the washing machine at its lower end by means of two rubber rounds between which is clamped a base plate of the housing frame. Upwardly directed forces are transmitted to the upper rubber round and downwardly directed forces are transmitted to the lower rubber round.
  • each friction damper device has a friction plate fastened to the tub against which friction linings of friction heads are pushed in pairs on opposite sides, which heads are each fastened to an arm of a clamping or retaining strap.
  • a motor friction switch which is able to push the friction heads against the pre-tension force of the clamping and retaining straps, grips the arms of the clamping and retaining straps which normally press the friction linings against the friction plate.
  • the friction switch is designed as a piston/cylinder drive that can be loaded with a pressure fluid.
  • the friction switch may comprise an electric motor and an adjusting spindle. The damping forces of the friction damper device can therefore be increased after the critical speed is passed.
  • the object of this invention includes providing a friction damper device that is of relatively simple construction and guarantees safe operation of the washing machine.
  • a further advantage of the invention includes the fact that in the event of a sudden power failure, for example if the washing machine is accidentally switched off during its operation, the friction damper device according to the invention regains its damping force immediately and automatically, thereby guaranteeing safe “passage” through the lower speed range until the machine stops.
  • the present friction damper device can, in particularly, be effectively switched in a speed range of the washing drum from approximately 0 to 300 rpm, which also includes the resonance range for the spinning acceleration. Above this range, i.e.
  • the damper forces do not affect the oscillating behavior of the washing unit, which is why the present friction damper device can be either completely switched off electrically or switched so that its damping force is reduced, thereby considerably improving the oscillating behavior of the entire washing machine.
  • the vibratory behavior of the entire appliance is improved and noises are reduced.
  • the present friction damper device is switched so that its damping effect is restored when the upper spinning speed range is departed from.
  • the present friction damper device can be used for upright and suspended systems, as well as in mixed systems.
  • FIG. 1 shows in a diagrammatic view an explanatory representation of a possible suspension of the washing unit of a washing machine
  • FIG. 2 shows a side view of the friction damper device according to the invention
  • FIG. 3 shows a section through the friction damper device according to the invention along line III-III in FIG. 2 ,
  • FIG. 4 shows a further embodiment of the friction damper device according to the invention
  • FIG. 5 shows a section along line V-V of the embodiment of the friction damper device according to the invention shown in FIG. 4 .
  • FIG. 6 shows a further development of the embodiment of the friction damper device according to the invention shown in FIG. 4 .
  • washing unit 2 of a washing machine of prior art arranged in a housing 1 , comprises a tub 3 , a washing drum 4 and a drive 5 arranged on tub 3 , which drive rotates washing drum 3 about a horizontal axis 6 .
  • Washing 2 can be suspended preferably directly on an upper frame of housing 1 by means of tension springs 7 , shown diagrammatically.
  • dampers 8 which are supported on the one hand on washing unit 2 and on the other on a lower frame part 9 of housing 1 , are provided on tub 3 .
  • the piston rods of dampers 8 are denoted by 10 .
  • this invention provides a friction damper device 29 whose damping force can be switched or controlled electrically. Since the damping forces would disturb the oscillating behavior of washing unit 2 above the above-mentioned speed range, the damping force of this friction damper device 29 can be switched or reduced quite effectively above this range so that the oscillating and vibratory behavior of the entire washing machine is considerably improved and the noise generated is reduced in this upper speed range. When the upper speed range is again departed from after spinning, the damping force of this friction damper device 29 is restored.
  • this friction damper device 29 is switched or controlled electrically against the force of a compression spring 14 , as will be explained in greater detail below, it is possible for friction damper device 29 to retain its damping force immediately and automatically after a sudden power failure, for example if the washing machine is accidentally switched of, thereby guaranteeing safe passage through the lower speed range until the machine stops.
  • FIG. 2 shows a preferred embodiment of this friction damper device 29 . It comprises essentially, and in a known manner, a piston rod 10 of a damper 8 , which is articulated with its upper end 11 to washing unit 2 and with its lower end 12 to a lower frame part 9 of housing 1 .
  • a cylindrical housing part 13 that at least partially surrounds piston rod 10 incorporates a slide 15 , which suitably runs transversely to piston rod 10 and which preferably has a shoulder part 18 , which is preferably plate-shaped, on its side facing piston rod 10 , to which part is fastened a friction lining 16 .
  • an energy store on the side of shoulder part 18 facing away from piston rod 10 which store preferably takes the form of a helical compression spring 14 surrounding slide 15 , which spring is supported on one side on shoulder part 18 and on the other sided on stop part 19 , so that shoulder part 18 presses with friction lining 16 against piston rod 10 .
  • friction lining 16 is preferably designed in an annular shape so that it bears with its friction surface 24 partially and suitably flush against the peripheral surface of piston ring 10 , which has the shape of a regular cylinder, when compression spring 15 exerts its effect.
  • Friction lining 16 is preferably fastened, preferably glued, in a circular recess 26 of shoulder part 18 . Friction lining 16 is preferably designed so that it is able to engage on half the peripheral surface of piston rod 10 .
  • a further friction lining 17 which is preferably also annular in shape, is located on the side of piston rod 10 opposite friction lining 16 , so that lining 17 bears partially, and preferably flush with its friction surface 27 against the peripheral surface of piston rod 10 , its side facing away from piston rod 10 being preferably fastened, in particular glued, to an inner wall 25 of housing part 13 also running in a circular course.
  • Slide 15 can be actuated by an electromagnetic actuator 20 against the force of compression spring 15 , in the manner shown in FIG. 2 , so that shoulder part 18 is moved with friction lining 16 away from piston rod 10 when actuator 20 is energized so that piston rod 10 is able to oscillate freely.
  • Electromagnetic actuator 20 is located in a housing part 22 which preferably has an end face forming stop part 19 , which end face has an opening 21 through which slide 15 runs, housing part 22 being fastened to housing part 13 .
  • the electrical cable serving to supply power to actuator 20 is shown diagrammatically and is denoted by 23 .
  • Friction damper device 29 previously described operates in the following manner. Actuator 20 is energized in the lower speed range from approximately 0 to 300 rpm of washing drum 4 so that compression spring 15 exerts its full effect and presses friction lining 16 against piston rod 10 so that the latter is retained between friction linings 16 and 17 by friction in a damping manner and an action that damps the vibrations of washing unit 2 is exerted.
  • electromagnetic actuator 20 is energized so that friction lining 16 is pulled away from piston rod 10 by a movement of slide 15 against the force of compression spring 14 . Piston rod 10 is not then damped. As soon as electromagnetic actuator 20 is energized slide 15 is released and compression spring 15 again presses friction lining 16 against piston rod 10 .
  • electromagnetic actuator 20 may also be used instead of electromagnetic actuator 20 described above, which generates a force “pulling” slide 15 when energized, provided that these springs operate in the manner explained above.
  • friction damper device A further embodiment of this friction damper device is explained in the following with reference to FIGS. 4 and 5 , where friction lining 31 is arranged on the periphery of a piston 37 arranged in a cylinder 38 of damper 8 and connected to piston rod 10 , and is pretensed by an energy store counter to the inner wall of cylinder 38 .
  • An actuator is able to displace a friction lining 31 away from the inner wall of cylinder 38 during is activation against the pretension of the energy store.
  • the actuator is preferably a memory metal part 32 arranged on piston 37 , which part, when energized, generates a force which pulls or moves friction lining 31 , pretensed by the energy store counter to the inner wall of cylinder 38 , away from the inner wall.
  • Friction lining 31 is suitably fastened, in particular glued, to a support part 36 .
  • the memory metal part can be energized in various ways.
  • the introduction of thermal energy may be preferably provided for this purpose.
  • a further friction lining 35 is preferably fastened, preferably glued, to a further support part 39 on piston 37 , which part is connected to support part 36 so that it is able to rotate about a fulcrum 40 .
  • Support part 36 and further support part 39 run at least partially around the periphery of piston 37 and engages in a peripheral groove 41 ( FIG. 4 ) on its side facing towards piston 37 .
  • Memory metal part 32 is designed in the shape of a rod and runs through a through opening 42 leading transversely through piston 37 . It is fastened with its one end to support part 36 and with its other end to further support part 39 .
  • the fastening is preferably effected by means of retaining parts 43 which enable a force that is particularly favorable to be introduced over a large area into support part 36 and 39 respectively.
  • the end regions of support part 36 and further support part 39 facing away from fulcrum 40 are connected to one another by a recuperating spring 34 forming the energy store.
  • Recuperating spring 34 presses the aforementioned end regions apart towards the inner wall of cylinder 38 so that friction lining 31 and further friction lining 35 bear against the inner wall of cylinder 38 .
  • Rod-shaped memory metal part 32 is formed in particular preference by a metal wire.
  • FIG. 6 shows a further embodiment of this friction damper device. Details of FIG. 6 , which have already been explained with reference to FIGS. 4 and 5 , are denoted by corresponding numbers.
  • the actuator is a memory wire 33 , which is formed into a loop and, when energized, reduces the circumference of the loop.
  • the loop runs around a roll 40 arranged in a cavity 41 of piston 37 and fastened to support part 36 .
  • the loop is fastened to further support part 39 on the side opposite roll 44 , and the end regions of support part 36 and further support part 39 facing away from fulcrum 40 are spread apart by recuperating spring 34 .
  • recuperating spring 34 pretenses support parts 36 and 39 with friction linings 31 and 35 respectively counter to the inner wall of cylinder 38 , and that friction linings 31 and 35 are pulled away from the inner wall when memory part 32 is energized.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Vibration Prevention Devices (AREA)
US11/664,225 2004-10-01 2005-09-30 Friction Damper Device for a Washing Machine Abandoned US20080256986A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004047999A DE102004047999A1 (de) 2004-10-01 2004-10-01 Reibungsdämpfereinrichtung für eine Waschmaschine
DE102004047999.2 2004-10-01
PCT/EP2005/054958 WO2006037767A1 (de) 2004-10-01 2005-09-30 Reibungsdämpfereinrichtung für eine waschmaschine

Publications (1)

Publication Number Publication Date
US20080256986A1 true US20080256986A1 (en) 2008-10-23

Family

ID=35519661

Family Applications (2)

Application Number Title Priority Date Filing Date
US11/664,225 Abandoned US20080256986A1 (en) 2004-10-01 2005-09-30 Friction Damper Device for a Washing Machine
US13/010,969 Abandoned US20110113832A1 (en) 2004-10-01 2011-01-21 Friction damper device for a washing machine

Family Applications After (1)

Application Number Title Priority Date Filing Date
US13/010,969 Abandoned US20110113832A1 (en) 2004-10-01 2011-01-21 Friction damper device for a washing machine

Country Status (5)

Country Link
US (2) US20080256986A1 (de)
EP (1) EP1797232B1 (de)
DE (1) DE102004047999A1 (de)
PL (1) PL1797232T3 (de)
WO (1) WO2006037767A1 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110311171A1 (en) * 2009-04-06 2011-12-22 Messier-Bugatti-Dowty Controlled-friction linear device in which a press force is applied perpendicular to the movement
CN102947612A (zh) * 2010-05-11 2013-02-27 阿迪尔·坎尼奥兹 机电摩擦减振器
US10253695B2 (en) * 2015-08-14 2019-04-09 United Technologies Corporation Heat exchanger for cooled cooling air with adjustable damper
US10287982B2 (en) 2015-08-14 2019-05-14 United Technologies Corporation Folded heat exchanger for cooled cooling air
US10400379B2 (en) * 2015-03-16 2019-09-03 Lg Electronics Inc. Laundry processing apparatus
CN111485375A (zh) * 2019-01-29 2020-08-04 青岛海尔洗衣机有限公司 一种阻尼减震器及装有该减震器的洗衣机及控制方法
WO2020246754A1 (en) * 2019-06-05 2020-12-10 Samsung Electronics Co., Ltd. Damper and washing machine having the same
US20210262543A1 (en) * 2020-02-24 2021-08-26 Suspa Gmbh Frictional damper
CN113661286A (zh) * 2019-06-05 2021-11-16 三星电子株式会社 阻尼器及具有该阻尼器的洗衣机
EP4345337A1 (de) * 2022-09-20 2024-04-03 SUSPA GmbH Reibungsdämpfer

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DE102007028739B4 (de) * 2007-06-21 2012-02-23 Seuffer Gmbh & Co.Kg Waschmaschine
ITMI20080237A1 (it) * 2008-02-15 2009-08-16 Cima Compagnia Italiana Molle A Acciaio Spa Ammortizzatore a frizione per lavabiancheria
DE102008038133B4 (de) 2008-08-18 2012-03-15 Miele & Cie. Kg Dämpfer für eine Waschmaschine
DE102008039569B4 (de) 2008-08-25 2013-05-16 Seuffer Gmbh & Co.Kg Aufhängevorrichtung, Wascheinrichtung und Verfahren zur Steuerung einer Wascheinrichtung
DE102010051663A1 (de) * 2010-11-17 2012-05-24 Liebherr-Hydraulikbagger Gmbh Arbeitsgerät
DE102010063013A1 (de) 2010-12-14 2012-06-14 BSH Bosch und Siemens Hausgeräte GmbH Waschmaschine, Waschtrockner od. dgl. mit hinzukommenden Antrieb bzw. Antriebssystem sowie Verfahren zum Betreiben eines solchen Antriebssystems
KR101286701B1 (ko) 2011-10-07 2013-07-16 인하대학교 산학협력단 가변 마찰 댐퍼
KR101286703B1 (ko) 2011-10-07 2013-07-16 인하대학교 산학협력단 형상 기억 합금을 이용한 가변 마찰 댐퍼
ITPN20120003A1 (it) * 2012-01-23 2013-07-24 Ro Sa Plast Spa Ammortizzatore con mezzi di regolazione della frenatura
ES2435102B1 (es) 2012-05-23 2014-09-24 Bsh Electrodomésticos España, S.A. Dispositivo amortiguador rotatorio para aparato electrodoméstico
EP3553218B1 (de) * 2012-07-30 2020-11-18 LG Electronics Inc. Wäschebehandlungsmaschine
KR101916438B1 (ko) * 2012-07-30 2018-11-07 엘지전자 주식회사 세탁물 처리기기
EP2757282B1 (de) * 2013-01-21 2018-03-14 Aksistem Elektromekanik Sanayi ve Ticaret Ltd. Sti. Elektromechanischer Stoßdämpfer für Waschmaschinen
KR101449472B1 (ko) 2013-01-30 2014-10-13 인하대학교 산학협력단 급수압을 이용한 가변 마찰 댐퍼
KR102331601B1 (ko) * 2015-04-01 2021-11-30 엘지전자 주식회사 지지장치 및 상기 지지장치가 구비된 의류처리장치
ES2592569B1 (es) * 2015-05-29 2017-09-08 Bsh Electrodomésticos España, S.A. Dispositivo amortiguador
DE102017217416A1 (de) * 2017-09-29 2019-04-04 E.G.O. Elektro-Gerätebau GmbH Federeinrichtung zur federnden Lagerung einer Funktionseinheit eines Elektrogeräts und Verfahren zur Beeinflussung einer solchen Federeinrichtung
DE102018211770A1 (de) 2018-07-16 2020-01-16 BSH Hausgeräte GmbH Schwingungsdämpfungssystem und Gerät zum Behandeln von Wäsche
DE102018211769A1 (de) 2018-07-16 2020-01-16 BSH Hausgeräte GmbH Schwingungsdämpfungssystem und Gerät zum Behandeln von Wäsche
DE102018211774A1 (de) 2018-07-16 2020-01-16 BSH Hausgeräte GmbH Schwingungsdämpfungssystem und Gerät zum Behandeln von Wäsche
DE102018211772A1 (de) 2018-07-16 2020-01-16 BSH Hausgeräte GmbH Schwingungsdämpfungssystem und Gerät zum Behandeln von Wäsche
WO2021078394A1 (en) * 2019-10-25 2021-04-29 Electrolux Professional S.P.A. Washing machine and a piston damper therefore
DE102020111770A1 (de) 2020-04-30 2021-11-04 Miele & Cie. Kg Dämpfer für eine Waschmaschine
DE102020206722A1 (de) * 2020-05-28 2021-12-02 Suspa Gmbh Dämpferanordnung und Maschine für eine derartige Dämpferanordnung
EP4030077A1 (de) * 2021-01-15 2022-07-20 Öhlins Racing AB Dämpferanordnung und hydraulischer stossdämpfer damit
WO2023249245A1 (ko) * 2022-06-21 2023-12-28 삼성전자 주식회사 터브의 진동을 감쇠하는 댐퍼를 갖는 세탁기
KR20240062842A (ko) * 2022-11-02 2024-05-09 삼성전자주식회사 댐퍼 및 이를 포함하는 세탁기

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8739942B2 (en) * 2009-04-06 2014-06-03 Messier-Bugatti-Dowty Controlled-friction linear device in which a press force is applied perpendicular to the movement
US20110311171A1 (en) * 2009-04-06 2011-12-22 Messier-Bugatti-Dowty Controlled-friction linear device in which a press force is applied perpendicular to the movement
CN102947612A (zh) * 2010-05-11 2013-02-27 阿迪尔·坎尼奥兹 机电摩擦减振器
US20130098718A1 (en) * 2010-05-11 2013-04-25 Adil Kanioz Electromechanical friction shock absorber
US9022185B2 (en) * 2010-05-11 2015-05-05 Adil Kanioz Electromechanical friction shock absorber
US10400379B2 (en) * 2015-03-16 2019-09-03 Lg Electronics Inc. Laundry processing apparatus
US11492973B2 (en) 2015-08-14 2022-11-08 Raytheon Technologies Corporation Folded heat exchanger for cooled cooling air
US10287982B2 (en) 2015-08-14 2019-05-14 United Technologies Corporation Folded heat exchanger for cooled cooling air
US10253695B2 (en) * 2015-08-14 2019-04-09 United Technologies Corporation Heat exchanger for cooled cooling air with adjustable damper
US11572928B2 (en) 2015-08-14 2023-02-07 Raytheon Technologies Corporation Heat exchanger for cooled cooling air with adjustable damper
CN111485375A (zh) * 2019-01-29 2020-08-04 青岛海尔洗衣机有限公司 一种阻尼减震器及装有该减震器的洗衣机及控制方法
WO2020246754A1 (en) * 2019-06-05 2020-12-10 Samsung Electronics Co., Ltd. Damper and washing machine having the same
CN113661286A (zh) * 2019-06-05 2021-11-16 三星电子株式会社 阻尼器及具有该阻尼器的洗衣机
US11578450B2 (en) 2019-06-05 2023-02-14 Samsung Electronics Co., Ltd. Damper and washing machine having the same
US20210262543A1 (en) * 2020-02-24 2021-08-26 Suspa Gmbh Frictional damper
US11946522B2 (en) * 2020-02-24 2024-04-02 Suspa Gmbh Frictional damper
EP4345337A1 (de) * 2022-09-20 2024-04-03 SUSPA GmbH Reibungsdämpfer

Also Published As

Publication number Publication date
EP1797232B1 (de) 2013-09-11
DE102004047999A1 (de) 2006-04-06
PL1797232T3 (pl) 2014-02-28
EP1797232A1 (de) 2007-06-20
WO2006037767A1 (de) 2006-04-13
US20110113832A1 (en) 2011-05-19

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