EP0029516B1 - Trommel für Waschmaschine - Google Patents

Trommel für Waschmaschine Download PDF

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Publication number
EP0029516B1
EP0029516B1 EP19800106629 EP80106629A EP0029516B1 EP 0029516 B1 EP0029516 B1 EP 0029516B1 EP 19800106629 EP19800106629 EP 19800106629 EP 80106629 A EP80106629 A EP 80106629A EP 0029516 B1 EP0029516 B1 EP 0029516B1
Authority
EP
European Patent Office
Prior art keywords
drum
side wall
end parts
parts
apertures
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
Application number
EP19800106629
Other languages
English (en)
French (fr)
Other versions
EP0029516A1 (de
Inventor
William Harry Percival
Henry Ravenscroft Wilkins
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.)
Servis Domestic Appliances Ltd
Original Assignee
Servis Domestic Appliances Ltd
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 Servis Domestic Appliances Ltd filed Critical Servis Domestic Appliances Ltd
Publication of EP0029516A1 publication Critical patent/EP0029516A1/de
Application granted granted Critical
Publication of EP0029516B1 publication Critical patent/EP0029516B1/de
Expired 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
    • D06F37/02—Rotary receptacles, e.g. drums
    • D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis

Definitions

  • the present invention relates to a laundry machine such as a washing machine, spin dryer, or tumble dryer, or any machine capable of carrying out any combination of the functions of the above mentioned machines.
  • the invention is specifically concerned with a drum in which the laundry is to be placed during washing and/or drying operations.
  • the best known type of drum in use in laundry machines typically comprises two cup- shaped parts, one at each end joined at the centre to form a drum, one of which parts has a large central aperture in one end thereof through which the laundry may be placed in and removed from the drum, the other part being provided with an axle or other bearing means by means of which the drum may be supported for rotation at a generally horizontal axis, the cylindrical side wall formed by the connecting parts having therein a large number of apertures usually in the form of circular holes to enable water to pass through the wall.
  • the drum as aforedescribed When the laundry machine is a washing machine, the drum as aforedescribed will be placed in a substantially water-tight container and mounted for rotation within said container, the container being partially filled with water and emptied, either automatically or manually, during a washing cycle.
  • the container In a normal automatic washing cycle the container can be filled and emptied several times to provide more than one washing operation and usually several rinsing operations.
  • the type of drum described above has been in use for many years, however, there are problems with such drums.
  • the apertures in the side wall of the drum even though they may be formed with rounded edge surfaces to avoid presentation of sharp edges to the laundry, are still detrimental to the laundry being washed or dried since damage can be caused by the tendency of the laundry to be pressed into the apertures.
  • Machines have also been (FR-A-2,140,036) proposed in which a drum comprising a cylindrical perforated side wall part has been connected to end parts by way of radially projecting flanges on the side wall and end parts, the latter including portions of arcuate section presenting interior concave faces adjacent to the connections with the side wall part.
  • This construction however would not promote good longitudinal distribution and moreover would suffer from the damaging effect of forcing the articles into the holes of the perforated side wall part.
  • a drum in or for a laundry machine comprising end parts connected to opposite ends of an imperforate side wall part divergent internally from a position in the mid region of its length towards each of its ends, the connection in each case being through the intermediary of a flange on one of the parts projecting outwardly in a direction transverse to the interior surface of this part and through the intermediary of a spaced opposing face on the other of the parts, providing a plurality of circumferentially spaced apertures between the end parts and the side wall part, one only of the end parts being provided with mounting means for rotation of the drum about its axis, and the other of the end parts having a central aperture for access to the inside of the drum, characterized in that the end parts have rim portions of arcuate section presenting concave faces inwardly of the drum which are arranged to be in smooth continuation of the interior surface of the side wall part by providing outwardly projecting mutually opposing and connected flanges and on both the side wall and the end wall parts
  • the flanges of the end parts are provided with the depression and lands, the flanges on the side wall being left substantially planar.
  • such securement may be provided for by welding for example spot welding the mutual abutting contacting parts of the flanges.
  • the innermost surface of the drum is as smooth as possible thereby greatly reducing the amount of damage to the clothes being washed or centrifugally dried in the drum, and furthermore presenting easily accessible contact sur- facts by means of which the end parts may be secured firmly to the side wall member of the drum, thereby making the assembly of the drum an operation which can be carried out with simple spot welding apparatus.
  • the resultant construction may be easily inspected to ensure that the drum has been properly assembled.
  • the arcuate rim portions of the end parts make a large contribution towards the strength of the drum and by providing the contact areas between the end parts and the side wall member at the radially outermost point of the drum, i.e. at positions of maximum diameter, it ensures that the contact surfaces between the end parts and the side wall member are at a position of maximum area and also at a position subjected to a smaller force.
  • the drum of the present invention assists greatly in overcoming the problems aforementioned concerned with washing drums, the internal surface of the side wall member being generally imperforate will be as smooth as possible to minimise wear on the laundry during a washing or drying operation. Furthermore, the divergent side wall member contributes towards better distribution of clothes in the drum. The positioning of the apertures ensures there is minimum contact between the clothes and the apertures themselves in addition to providing a very convenient and strong assembly of the drum as a whole.
  • the drum is of a diabolo shape but may be of generally arcuate form provided the position of minimum diameter is approximately mid-way between its ends.
  • the mid-region of the side wall may be of substantially cylindrical configuration over a certain axial length of the drum, the two end regions of the side wall being divergent with. respect to the rotational axis towards the ends of the drum.
  • the angle of divergence relative to the central axis of the drum is such that it is large enough to aid separation of individual items of laundry being washed or dried in a drum to prevent "balling" of several items together and generally assists separation of the laundry to improve the washing and drying thereof. Furthermore, the angle of divergence is not too large that would cause "bunching", at each end region, of the items of laundry being washed or dried.
  • the acute angle between the central axis of the drum and such divergent section of the side wall should be greater than 2 1/2° and less than 10°.
  • the drum of the present invention may be mounted for rotation about a horizontal or vertical axis or any angle therebetween but is primarily intended for a laundry machine in which the drum is rotated or oscillated about a substantially horizontal axis.
  • a laundry machine drum has a first end part generally indicated at 10, a second end part generally indicated at 11, the second end part 11 having a central aperture 12 through which laundry may be put in or taken out of the drum in use of the laundry machine.
  • the opening 12 is closed during use of the machine by a door which co-operates and closes an capitad aperture in a water-tight compartment in which the drum in use is mounted for rotation.
  • the two end parts 10 and 11 are each connected to a respective end of the side wall member generally indicated at 13.
  • the two end parts are formed of shallow dish-like configuration each having rim portions 1 Oa and 11 a a respectively of arcuate section which present concave faces inwardly resulting in end parts having a very rigid form to increase the strength of the drum.
  • the drum in use, is rotated about an axis 14 which may be either vertical or horizontal or some position therebetween.
  • the drum illustrated in the drawings is designed particularly, but bot exclusively, for rotation about a horizontal axis.
  • the side wall member 13 is made from sheet-like material for example stainless steel, the side wall being substantially apertureless and having a smooth internal surface.
  • the side wall 13 is shaped so that it has a diabolo-like configuration, the side wall 13 having a minimum diameter between opposing surfaces 15 at a mid-region of the drum and thereafter diverging towards each end two positions of maximum diameter 16 and 17 adjacent respective end parts 10 and 11.
  • the side wall member 13 is provided at its ends with radially outwardly directed flanges 18 and 19, to the flanges 18 and 19 are secured respective end parts 10 and 11.
  • the end part 10 comprises a dished member which may be a stainless steel pressing, the end part 10 may have a plurality of additional reinforcing ribs two of which can be seen at 20 and 21, which reinforcing ribs extend from a recess 22 to the radially outermost part of the end part 10.
  • the end part 10 is also formed with a radially outwardly extending flange 23 which is deformed to form a plurality of depressions and lands such that only relatively circumferentially spaced portions, for example 24, 25 and 26, make face-to-face contact with the flange 18 provided on the side wall member 13. Where face-to-face contact occurs between the end part 10 and the side wall member 13 they may be secured together by spot welding or any other satisfactory means of fastening.
  • annular array of apertures for example 29 and 30, are provided at one of the positions at maximum diameter of the drum, which array of apertures provides water inlet/outlet means.
  • the other end part 11 is formed in a similar manner with the exception of the provision of the central aperture 12 and the absence of reinforcing ribs. Since the drum is mounted for rotation by means provided on the end part 10, the end part 11 is not subjected to the same strains and forces in use as the end part 10.
  • the end part 11 is formed with a flange 31 having similar lands and depressions on its flange 31, the lands for example 32, 33 and 34 make face-to-face contact with the flange 19 on the side wall member 13 and are secured thereto by spot welding for example.
  • the depressions 35 and 36 defining combination with the flange 19 of the side wall member 13, an annular array of apertures 37 and 38 providing water inlet/outlet means once again located at a position of maximum diameter of the drum.
  • the drum may be provided on its inside preferably at circumferentially spaced intervals with "lifters", which extend substantially parallel to the rotational axis and are secured to the side wall member or the end parts or all three, the lifters being adapted in known manner to cause tumbling action of the laundry in order to improve the washing or drying thereof.
  • the lifters will be of a smooth material being apertureless so as to prevent undue wear and abrasion to the laundry being washed or dried.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)

Claims (4)

1. Trommel für eine Waschmaschine, wobei die Trommel Endteile (10, 11) aufweist, die mit den gegenüberliegenden Enden eines nicht perforierten Seitenwandteiles (13) verbunden sind, das sich von innen von seinem Mittelbereich gegen jedes seiner Enden divergierend erstreckt, wobei die Verbindung in jedem Fall mittels eines Flansches auf einem der Teile, der sich nach außen senkrecht zur Innenoberfläche dieses Teiles erstreckt und mittels einer mit Abstand angeordneten gegenüberliegenden Flächen auf dem anderen Teil erfolgt, wobei mehrere auf dem Umfang mit Abstand angeordnete Öffnungen (29, 30, 37, 38) zwischen den Endteilen (10 und 11) in den Seitenwandteilen (13) vorgesehen sind, wobei nur eines (10) der Endstücke mit einer Montageeinrichtung (22) zum Drehen der Trommel um ihre Achse (14) ausgerüstet ist, und das andere Endstück (11) eine Mittelöffnung zwecks Zugang zum Trommelinneren besitzt, dadurch gekennzeichnet, daß die Endteile (10, 11) äußere Abschnitte (10a, 11a) bogenförmigen Querschnittes besitzen, die konkave Flächen zum Inneren der Trommel bieten, die so angeordnet sind, daß sie eine weiche Fortsetzung der Innenoberfläche des Seitenwandteiles (13) sind, indem nach außen vorspringende, wechselseitig einander gegenüberliegende und miteinander verbundene Flansche (18, 23 und 19, 31) sowohl an den Seitenwand- (13) und den Endwandteilen (10, 11) vorgesehen sind, wobei die miteinanderverbundenen Flansche (18, 23) und (19, 31) so ausgebildet sind, daß sie mehrere auf dem Umfang mit Abstand angeordnete, wechselseitig aneinanderstoßende Flächen und auf dem Umfang dazwischen liegende, wechselnd mit axialem Abstand angeordnete Flächen, die die Öffnungen (29, 30, 37, 38) begrenzen, bieten.
2. Trommel wie in Anspruch 1 beansprucht, dadurch gekennzeichnet, daß die Flansche (23, 31) auf den Endstücken (10, 11) derart verformt sind, daß sie eine Vielzahl aufeinanderfolgender Vertiefungen (27, 28, 35, 36) und dazwischen liegender erhabener Flächen (24, 25, 26, 32, 33, 34) bilden, wobei jede in Umfangsrichtung etwa gleich lang wie die Vertiefungen ist, und der zusammenwirkende Flansch auf dem Seitenwandteil (13) im allgemeinen planarer Konfiguration ist.
3. Trommel wie in Anspruch 1 oder 2 beansprucht, dadurch gekennzeichnet, daß das Seitenwandteil (13) der Trommel diaboloförmig ist und der spitze Winkel zwischen der Rotationsachse (14) zu der Trommel und den divergierenden Abschnitten der Seitenwand (13) größer als 2 1/2° und weniger als 10° ist.
4. Trommel wie in Anspruch 3 beansprucht, dadurch gekennzeichnet, daß der spitze Winkel größer als 5° und kleiner als 7° ist.
EP19800106629 1979-11-07 1980-10-29 Trommel für Waschmaschine Expired EP0029516B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7938588 1979-11-07
GB7938588 1979-11-07

Publications (2)

Publication Number Publication Date
EP0029516A1 EP0029516A1 (de) 1981-06-03
EP0029516B1 true EP0029516B1 (de) 1984-01-25

Family

ID=10509039

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800106629 Expired EP0029516B1 (de) 1979-11-07 1980-10-29 Trommel für Waschmaschine

Country Status (5)

Country Link
EP (1) EP0029516B1 (de)
BE (1) BE885926A (de)
DE (1) DE3066306D1 (de)
FR (1) FR2469491A1 (de)
IE (1) IE50169B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114178796B (zh) * 2021-12-27 2024-01-30 无锡市正红车厢有限公司 一种滚筒洗衣机用滚筒孔的加工方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE571646C (de) * 1933-03-03 Friedrich Emil Krauss Trommel, insbesondere fuer Waescheschleudern
GB829380A (en) * 1957-07-16 1960-03-02 Gen Motors Ltd Improvements in or relating to centrifugal clothes driers
FR1191068A (fr) * 1958-02-04 1959-10-16 Thomson Houston Comp Francaise Perfectionnements aux machines à laver le linge
FR1370320A (fr) * 1963-09-24 1964-08-21 Siemens Elektrogeraete Gmbh Machine à laver le linge
GB1388731A (en) * 1971-05-28 1975-03-26 Zanussi A Spa Industrie Drum for a washing machine or dryer
IT1083527B (it) * 1977-06-17 1985-05-21 Bertolino Riccardo Perfezionamenti nelle macchine lavatrici

Also Published As

Publication number Publication date
IE50169B1 (en) 1986-02-19
EP0029516A1 (de) 1981-06-03
BE885926A (fr) 1981-02-16
DE3066306D1 (en) 1984-03-01
FR2469491A1 (fr) 1981-05-22
IE802208L (en) 1981-05-07

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