EP0384149B1 - Vorrichtung zur Erzeugung unterschiedlicher Drehzahlen für eine Waschmaschine - Google Patents

Vorrichtung zur Erzeugung unterschiedlicher Drehzahlen für eine Waschmaschine Download PDF

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Publication number
EP0384149B1
EP0384149B1 EP90101525A EP90101525A EP0384149B1 EP 0384149 B1 EP0384149 B1 EP 0384149B1 EP 90101525 A EP90101525 A EP 90101525A EP 90101525 A EP90101525 A EP 90101525A EP 0384149 B1 EP0384149 B1 EP 0384149B1
Authority
EP
European Patent Office
Prior art keywords
speed variator
drum
flyweight
flyweights
washing machine
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.)
Expired - Lifetime
Application number
EP90101525A
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English (en)
French (fr)
Other versions
EP0384149A1 (de
Inventor
Luciano Valent
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.)
Industrie Zanussi SpA
Original Assignee
Industrie Zanussi SpA
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 Industrie Zanussi SpA filed Critical Industrie Zanussi SpA
Priority to AT90101525T priority Critical patent/ATE93906T1/de
Publication of EP0384149A1 publication Critical patent/EP0384149A1/de
Application granted granted Critical
Publication of EP0384149B1 publication Critical patent/EP0384149B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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 
    • D06F37/36—Driving arrangements  for rotating the receptacle at more than one speed

Definitions

  • the present invention relates to a speed variator for a laundry washing machine, according to the precharacterizing part of claim 1.
  • Conventional laundry washing machines are equipped with a speed variator operable to rotate the drum of the respective machine at variable transmission ratios and substantially comprising a variable-diameter driving pulley fixedly mounted on the output shaft of the electric motor of the machine and connected by a transmission V-belt to a corresponding driven pulley fixedly mounted on the shaft of the drum, said driving pulley being provided with radially displaceable flyweights dimensioned and designed to be directly displaceable from radially contracted first position corresponding to the laundering speed of the drum, to a radially expanded second position corresponding to the maximum spin-drying speed of the machine, and back again to the first position.
  • Such a speed variator is known, for example, from GB-A-2 129 072.
  • the therein described speed variator is provided with flyweights which are divided into two symmetrical parts joined by a spring which acts as a repulsion element and ensures that each of the parts of a flyweight is maintained constantly in engagement with one of the side walls of the channel-like guide inside which the flyweight itself slides.
  • speed variators of this type are generally satisfactory and reliable in operation, there is the disadvantage that they generate considerable noise when the transmission ratio is varied and/or the rotation of the drum is reversed. These noises result from the inevitable play of the flyweights during the displacements between their corresponding seats in the speed variator, these displacements themselves determining increased mechanical loads acting on the speed variator as a whole, particularly when the electric motor of the respective machine operates at the spin-drying speed.
  • a speed variator 5 for a laundry washing machine operable to control the rotation of the drum 6 of the machine at variable transmission ratios, and comprising a driving pulley 7 adapted to be rotated by an electric motor 8 of the machine and connected by a transmission V-belt 9 to a driven pulley 10 fixedly secured to the rotatable shaft 11 of drum 6.
  • driving pulley 7 is composed of a disc 12 fixedly mounted on the output shaft 13 of motor 8, a disc 14 mounted for axial displacement on shaft 13 relative to disc 12, and a further disc 15 secured to the end of output shaft 13, discs 12 and 14 cooperating to form a V-shaped groove 16 for the accommodation therein of V-belt 9.
  • Discs 14 and 15 on their part cooperate to define at least one internal cavity 17 therebetween, formed with seats 18 for the accommodation therein of a corresponding number of radially displaceable flyweights 19 of preferably cylindrical shape (cf. also fig. 3).
  • motor 8 thus results in the rotation of driving pulley 7 in unison with flyweights 19.
  • Motor 8 is advantageously designed to rotate drum 6 at two different speeds, specifically at a lower laundering speed and a higher spin-drying speed; the motor may also be designed, however, to operate at a greater number of different speeds.
  • Flyweights 19 on their part are dimensioned and designed to radially expand in response to the operation of motor 8 at the spin-drying speed, to thereby cause movable disc 14 to be axially displaced towards fixed disc 12, with the consequent variation of the effective diameter of driving pulley 7.
  • V-belt 9 is displaced between different diameters of driving pulley 9, specifically between a minimum diameter as shown in fig. 1 and a maximum effective diameter illustrated in fig. 2, corresponding respectively to the laundering speed and the spin-drying speed of motor 8, to thereby rotate drum 6 at different transmission ratios.
  • each flyweight 19 is subdivided into at least two symmetrically identical metal components 20 and 21 adapted to be joined to one another by the interposition therebetween of at least one elastic element 22 made of rubber or a similarly elastic material capable of dampening mechanical loads (cf. figs. 3 and 4).
  • Elastic element 22 is formed with a central flange 23 of circular shape and two cylindrical portions 24 and 25 projecting laterally from flange 23 and adapted to be inserted by the exertion thereon of a slight force into corresponding blind bores 26 and 27 formed respectively in the two components 20 and 21 of flyweight 19.
  • Each cylindrical portion 24 and 25 is formed with a central recess 28 and 29, respectively, of preferably conical shape extending thereinto from the respective outer end face, and with a number of grooves or slots 30 and 31, respectively, extending over the full length of the outer surface of the respective portion.
  • Conical recesses 28 and 29 serve the purpose of permitting the material of the cylindrical portion 24 and 25 of elastic element 22 to resiliently yield to mechanical loads, so that, thanks to the abutment of the central flange 23 of the elastic element on the respective end faces of the two components 20 and 21 of flyweight 19, the elastic element 22 is capable of effectively absorbing and dampening the mechanical loads transmitted axially through the flyweight during the operation of the speed variator.
  • the axial grooves or slots 30 and 31 serve the purpose of permitting air to escape from the blind bores 26 and 27 of the two parts 20 and 21, respectively, of flyweight 19 when the cylindrical portions 24 and 25 of elastic element 22 are inserted thereinto during assembly of flyweight 19, to thereby establish a state of equilibrium between the air pressure within the respective blind bore and the outside air pressure,resulting in the correct positioning of the cylindrical portions in the respective blind bores during the operation of the laundry washing machine.
  • the central flange 23 of the respective elastic element 22 is addionally capable of effectively absorbing and dampening mechanical loads acting on the flyweight in the radial direction, thanks to the elastic yielding of the material of the flange when coming into contact with the wall of the respective seat 18 formed in the speed variator for the accommodation of the respective flyweight.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
  • Centrifugal Separators (AREA)
  • Detergent Compositions (AREA)

Claims (1)

  1. Geschwindigkeits-Variator für eine Wäsche-Waschmaschine mit einer Trommel und einem elektrischen Motor zum Rotieren der Trommel mit Wasch- und Schleudertrocknungs-Geschwindigkeiten, wobei der Geschwindigkeits-Variator mindestens ein Übertragungsband (9) aufweist, welches mit entsprechenden antreibenden und angetriebenen Rollen (11, 12) verbunden ist, welche dem Motor und der Trommel in entsprechender Weise zugeordnet sind, und einer Vielzahl von radial verschiebbaren Schwunggewichten (20, 21), vorzugsweise von zylindrischer Form, welche sich in korrespondierenden Sitzen befinden, welche in zumindest einer der Rollen ausgebildet sind, vorzugsweise in der antreibenden Rolle, wobei die entsprechende Rolle einen variablen effektiven Durchmesser gemäß der Rotationsgeschwindigkeit des Motors aufweist, und wobei jedes Schwunggewicht (19) in zumindest zwei symmetrische und identische Komponenten (20, 21) aufgeteilt ist, welche so ausgelegt sind, daß sie miteinander durch das Zwischenfügen von mindestens einem elastischen Element (22) miteinander verbunden werden können,
    dadurch gekennzeichnet, daß
    das elastische Element (22) aus elastomerischem Material oder einem ähnlichen geeigneten Material hergestellt ist, welches in der Lage ist, mechanische Lasten zu dämpfen und welches einen zentralen Flansch (23) mit kreisförmiger Form und zwei laterale zylindrische Abschnitte (24, 25) aufweist, welche so ausgelegt sind, daß sie während des Zusammenbaus des Schwunggewichtes in nicht durchgehende Bohrungen (26, 27) eingesetzt werden können, welche in den Schwunggewichtskomponenten vorgesehen sind, und wobei jede der zylindrischen Abschnitte (24, 25) mit einer zentralen Aussparung (28, 29) ausgebildet ist, vorzugweise mit konischer Form, und mit Rillen oder Schlitzen (30, 31), welche sich über die volle Länge der äußeren Oberfläche des entsprechenden zylindrischen Abschnitts erstrecken, und wobei der zentrale Flansch (23) so dimensioniert ist, daß er mit der inneren Wandoberfläche des Sitzes (18), welcher das entsprechende Schwunggewicht (19) beinhaltet, in Berührung kommt.
EP90101525A 1989-02-23 1990-01-25 Vorrichtung zur Erzeugung unterschiedlicher Drehzahlen für eine Waschmaschine Expired - Lifetime EP0384149B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90101525T ATE93906T1 (de) 1989-02-23 1990-01-25 Vorrichtung zur erzeugung unterschiedlicher drehzahlen fuer eine waschmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8945712A IT1234687B (it) 1989-02-23 1989-02-23 Variatore di velocita' per macchine lavabiancheria.
IT4571289 1989-02-23

Publications (2)

Publication Number Publication Date
EP0384149A1 EP0384149A1 (de) 1990-08-29
EP0384149B1 true EP0384149B1 (de) 1993-09-01

Family

ID=11257536

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90101525A Expired - Lifetime EP0384149B1 (de) 1989-02-23 1990-01-25 Vorrichtung zur Erzeugung unterschiedlicher Drehzahlen für eine Waschmaschine

Country Status (5)

Country Link
EP (1) EP0384149B1 (de)
AT (1) ATE93906T1 (de)
DE (1) DE69002961T2 (de)
ES (1) ES2054112T3 (de)
IT (1) IT1234687B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017028790A1 (zh) * 2015-08-17 2017-02-23 青岛海尔洗衣机有限公司 洗衣机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017035202A (ja) * 2015-08-07 2017-02-16 青島海爾洗衣机有限公司ＱｉｎｇＤａｏ Ｈａｉｅｒ Ｗａｓｈｉｎｇ Ｍａｃｈｉｎｅ Ｃｏ．，Ｌｔｄ． 洗濯機
JP6675841B2 (ja) * 2015-08-28 2020-04-08 青島海爾洗衣机有限公司ＱｉｎｇＤａｏ Ｈａｉｅｒ Ｗａｓｈｉｎｇ Ｍａｃｈｉｎｅ Ｃｏ．，Ｌｔｄ． 洗濯機

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT8253865U1 (it) * 1982-10-27 1984-04-27 Bertolino Riccardo Puleggia espansibile ad azionamento centrifugo particolarmente per trasmissioni a cinghia di macchine lavatrici
US4496335A (en) * 1982-12-13 1985-01-29 Dayco Corporation Pulley construction and method of making the same
IT1181077B (it) * 1984-09-18 1987-09-23 Zanussi Elettrodomestici Variatore di velocita' per macchine lavabiancheria

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017028790A1 (zh) * 2015-08-17 2017-02-23 青岛海尔洗衣机有限公司 洗衣机
US11041266B2 (en) 2015-08-17 2021-06-22 Qingdao Haier Washing Machine Co., Ltd. Washing machine

Also Published As

Publication number Publication date
ATE93906T1 (de) 1993-09-15
EP0384149A1 (de) 1990-08-29
DE69002961T2 (de) 1993-12-16
DE69002961D1 (de) 1993-10-07
IT1234687B (it) 1992-05-26
ES2054112T3 (es) 1994-08-01
IT8945712A0 (it) 1989-02-23

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