EP3663453B1 - Appareil électroménager destiné à l'entretien du linge pourvu d'une poulie à courroie à laquelle est fixé un élément ressort - Google Patents

Appareil électroménager destiné à l'entretien du linge pourvu d'une poulie à courroie à laquelle est fixé un élément ressort Download PDF

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Publication number
EP3663453B1
EP3663453B1 EP19209526.3A EP19209526A EP3663453B1 EP 3663453 B1 EP3663453 B1 EP 3663453B1 EP 19209526 A EP19209526 A EP 19209526A EP 3663453 B1 EP3663453 B1 EP 3663453B1
Authority
EP
European Patent Office
Prior art keywords
hub
household appliance
drive shaft
spring element
appliance according
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.)
Active
Application number
EP19209526.3A
Other languages
German (de)
English (en)
Other versions
EP3663453A1 (fr
Inventor
Raik BITTIGAU
Rico Walther
Tom Weber
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 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 Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL19209526T priority Critical patent/PL3663453T3/pl
Publication of EP3663453A1 publication Critical patent/EP3663453A1/fr
Application granted granted Critical
Publication of EP3663453B1 publication Critical patent/EP3663453B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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 
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • D06F58/04—Details 
    • D06F58/06—Mountings for the rotating drums

Definitions

  • the invention relates to a household appliance for the care of items of laundry, with a laundry drum which comprises a drive shaft, and with a belt pulley.
  • the belt pulley can be rotated about an axis of rotation of the belt pulley by means of a belt drive of the household appliance.
  • the belt pulley is rotatably connected to the drive shaft.
  • a hub of the belt pulley has at least one form-locking element which engages with at least one corresponding form-locking element of the drive shaft.
  • a drive shaft has a toothing which engages in a corresponding toothing which is formed in a hub of a belt pulley.
  • the DE 10 2014 214 949 A1 describes a household laundry treatment machine in which a laundry drum is firmly connected to a drive shaft and the drive shaft is connected to a pulley of a belt drive.
  • the belt pulley is provided with a flange with an internal thread, one end of the drive shaft pointing away from the laundry drum having an external thread engaging the internal thread.
  • the belt pulley can have an insert in the area of its hub, which is made from a steel and thus from a stronger material than the rest of the belt pulley.
  • the belt pulley is driven, i.e. when the belt pulley is rotated about its axis of rotation, a torque is transmitted to the drive shaft by means of a toothing of the steel insert via this steel insert providing the hub.
  • a disadvantage here is the fact that the provision of the steel insert in the belt pulley is associated with increased effort and increased costs.
  • the object of the present invention is therefore to create a household appliance for the care of items of laundry, in which a torque can be transmitted from the belt pulley to the drive shaft in a particularly low-cost manner.
  • the household appliance according to the invention for the care of laundry items has a laundry drum which comprises a drive shaft, and a belt pulley which can be rotated about an axis of rotation of the belt pulley by means of a belt drive of the household appliance.
  • the belt pulley is rotatably connected to the drive shaft.
  • a hub of the belt pulley has at least one form-locking element which engages with at least one corresponding form-locking element of the drive shaft.
  • the at least one form-locking element of the hub extends in the direction of the axis of rotation into a region of the hub in which a spring element is arranged on the hub.
  • the at least one form-locking element of the hub and thus of the belt pulley thus has a particularly great length in the direction of the axis of rotation.
  • a torque can be easily transmitted from the belt pulley driven by means of the belt drive to the drive shaft.
  • a steel insert can be dispensed with. This makes the transmission of the torque from the belt pulley to the drive shaft particularly inexpensive.
  • a preload of a bearing element can be achieved, which is used to mount the drive shaft in a bearing housing of the household appliance.
  • an adjusted mounting of the drive shaft of the laundry drum can be implemented here.
  • the drum mounting encompassing the spring element makes it possible to increase the service life of the bearing and the rigidity of the bearing.
  • the at least one form-locking element which is formed in the hub of the belt pulley, and thus by dispensing with an insert made, for example, of steel, cost savings can be achieved and the effort required to provide the belt pulley can be reduced.
  • the spring element preassembled on the hub.
  • the belt pulley with the spring element arranged on the hub can be provided as a preassembled structural unit, for example by a supplier. This reduces the effort involved in final assembly of the household appliance, since the spring element does not need to be assembled as part of this final assembly.
  • the belt pulley can also be mounted particularly easily on the drive shaft in order to connect the belt pulley to the drive shaft in a form-fitting and rotationally fixed manner. Because of the comparatively great length of the form-locking element of the hub, good guidance of the belt pulley along the drive shaft is achieved when the hub is slipped onto the drive shaft. Tilting of the belt pulley, that is to say a deviation from a right-angled alignment of the belt pulley with respect to the drive shaft, can thus be prevented to a particularly large extent. This, too, is conducive to the good transmission of the torque from the belt pulley to the drive shaft.
  • the spring element is attached to the hub, it is particularly easy to determine, for example by means of a visual inspection, whether the spring element is mounted or not. Because the spring element arranged on the hub is good too see, for example by a fitter or by a person involved in the visual inspection, in particular at goods receipt, and / or by an optical detection device such as a camera.
  • the region of the hub in which the spring element is arranged is preferably designed as a hollow cylindrical shoulder of the belt pulley.
  • the spring element is arranged on the outside of the hollow cylindrical shoulder.
  • the hollow cylindrical shoulder preferably has a smaller diameter than an area of the hub adjoining the shoulder in the direction of the axis of rotation.
  • the at least one form-locking element of the hub is formed over the entire length of the hub in the direction of the axis of rotation.
  • the form-locking element of the hub then extends over the entire axial length of the hub.
  • the spring element preferably applies pressure to a bearing element, by means of which the drive shaft is rotatably mounted about the axis of rotation in a bearing housing of the household appliance.
  • the bearing housing can be formed, for example, by a tub of the household appliance.
  • At least one radial projection is preferably formed in the area of the hub, which secures the spring element against becoming detached from the hub. In this way it can be ensured that the spring element once attached to the hub also attaches the hub remains. This facilitates the handling of the belt pulley, since during this handling it is then not necessary to ensure that the spring element does not accidentally become detached from the hub.
  • the at least one radial projection can in particular be formed on a front edge of the region of the hub, for example by upsetting material of the hub or deforming or shaping the material of the hub in the radial direction.
  • the spring element is preferably designed as a wave spring which has at least one wave crest and at least one wave trough in the circumferential direction.
  • the at least one radial projection is preferably arranged in the circumferential direction of the wave spring in the region of the at least one wave trough. Because then, when the wave spring is secured to the hub, the at least one radial projection can easily be formed without this formation being impaired by the wave spring. This facilitates the captive mounting of the spring element on the hub.
  • the spring element has at least one first structural element which engages with at least one second structural element formed on the hub.
  • One of the structural elements can be designed very simply and with little effort as a radial projection and the other of the structural elements as a recess, for example in the form of a groove.
  • An installation position of the spring element in which the spring element is arranged on the hub is preferably predetermined by the structural elements. In this way it can be ensured according to the Poka Yoke principle that the spring element can only be attached to the hub in exactly one predetermined manner. This makes the assembly of the spring element particularly reliable and simple.
  • At least the hub of the pulley is preferably formed from an aluminum alloy.
  • this is inexpensive and, on the other hand, it is advantageous with regard to the weight of the belt pulley. This is especially true if not only the hub but the entire belt pulley is formed from the aluminum alloy.
  • the mutually corresponding interlocking elements of the hub and the drive shaft are preferably designed as teeth of a spline. This, too, is conducive to a good transmission of the torque from the belt pulley to the drive shaft, in particular if the splines are designed as serrations.
  • top, bottom, front, rear, horizontal, vertical, depth direction, “width direction”, “height direction” and the like are those with intended use and intended arrangement of the household appliance and given positions and orientations given to an observer then in particular standing in front of the household appliance and looking in the direction of the household appliance.
  • a household appliance 1 is shown in a schematic representation, which is designed for the care of laundry items.
  • the household appliance 1 can be designed, for example, as a washing machine, dryer or washer-dryer.
  • the household appliance 1 comprises an outer housing 2 in which a laundry drum 3 is rotatably mounted about an axis of rotation A.
  • a drive shaft 4 or the drum shaft of the laundry drum 3 can be mounted in a bearing housing of a tub (not shown) of the household appliance 1.
  • the household appliance 1 To drive the drive shaft 4, that is to say to rotate the drive shaft 4 and, with it, the laundry drum 3 about the axis of rotation A, the household appliance 1 has a belt drive 5 which comprises a motor 6 and a belt 7. During operation of the motor 6, the belt 7 sets a belt pulley 8 in a rotational movement about the axis of rotation A. A hub 9 is formed in one piece with the belt pulley 8 and is connected to the drive shaft 4 in a form-fitting and rotationally fixed manner.
  • mutually corresponding form-locking elements of the hub 9 on the one hand and the drive shaft 4 on the other hand can be designed as teeth 10 of a serration 11, which in FIG Fig. 2 is indicated schematically.
  • the teeth 10 of the hub 9 are approximately in Fig. 3 and in Fig. 4 better recognizable, only some of the teeth 10 being provided with a reference number here.
  • Fig. 2 is the drive shaft 4 without an in Fig. 1
  • the shown rear wall 12 of the laundry drum 3 is shown, which is rotatably connected to the drive shaft 4.
  • a first bearing element in the present case designed as a roller bearing 13
  • a second bearing element in the present case also designed as a roller bearing 14 are shown.
  • the two roller bearings 13, 14 preferably ensure that the drive shaft 4 is positioned on a supporting bearing, wherein in particular an O-arrangement of the two positioned roller bearings 13, 14 can be implemented.
  • a spring element 15 is provided, which is shown in FIG Fig. 2 is shown schematically.
  • the spring element 15 in the present case can be designed, for example, as a wave spring.
  • the spring element 15 is arranged on the hub 9.
  • the teeth 10 of the serration 11 of the hub 9 extend into a region of the hub 9 in which the spring element 15 is arranged on the hub 9.
  • this area of the hub 9 is designed as a hollow cylindrical shoulder 16 of the belt pulley 8, on the outside of which the spring element 15 is arranged.
  • a hollow cylindrical section 27 of the hub 9 adjoins this shoulder 16 in the direction of the axis of rotation A and has a larger outer diameter than the shoulder 16 in a radial direction (compare in particular Fig. 4 ).
  • the serration 11 of the hub 9 thus extends over a comparatively large length of the hub 9 in the direction of the axis of rotation A.
  • the serration 11 of the hub 9 extends up to a first step 17 formed in the drive shaft 4 Step 17 and a further or second step 18 of the drive shaft 4, the drive shaft 4 has a larger outer diameter than in the area in which the serration 11 of the drive shaft 4 is formed.
  • the first roller bearing 13 is also arranged in the area between the first stage 17 and the second stage 18.
  • the hollow cylindrical shoulder 16 formed on the belt pulley 8 preferably rests against the first step 17. Furthermore, an outer side of the shoulder 16 preferably ends flush with a length section of the drive shaft 4 formed between the first step 17 and the second step 18.
  • the spring element 15 acts on an inner ring 19 of the first roller bearing 13 with a pressure acting in the direction of the axis of rotation A when the belt pulley 8 is connected to the drive shaft 4. As a result, the first roller bearing 13 is preloaded.
  • the long formation of the serration 11 in the direction of the axis of rotation A ensures a good transmission of torque from the pulley 8 to the drive shaft 4 without an insert or insert made of steel having to be arranged in the pulley 8, which has a spline, in particular serrations.
  • the belt pulley 8 has a particularly simple structure.
  • the belt pulley 8 and the hub 9 formed in one piece with the belt pulley 8 are formed in the present case from an aluminum alloy.
  • the pulley 8 is pushed from above onto the vertical drive shaft 4 and finally secured in its position, for example by means of an in Fig. 2
  • the screw 20 shown here is screwed into a bore which is formed in the drive shaft 4.
  • the spring element 15 can indeed be placed on the end region of the drive shaft 4 having the serration 11.
  • the spring element 15 can be arranged on the outside of the shoulder 16 designed in the manner of a hollow cylindrical extension and secured against being lost or detached from the hub 9.
  • a front edge 21 of the shoulder 16 can be deformed at at least one point.
  • at least one radial projection 22 is formed in the shoulder 16.
  • the spring element 15 can also be secured against detachment from the hub 9 over the entire circumference of the shoulder 16, for example by upsetting the material of the shoulder 16. It is also possible to form more than the two radial projections 22 shown here by way of example, which are preferably evenly spaced from one another in the circumferential direction. Such a deformation of the shoulder 16 or such an upsetting of material, in particular in the area of the edge 21 of the shoulder 16, can be accomplished, for example, by means of a press or the like.
  • shaped elements or structural elements which are in engagement with one another are also formed in the present case.
  • a structural element formed on the hub 9 can be formed as a recess or as a groove 23 (cf. in particular Fig. 3 and Fig. 5 ).
  • this is Structural element provided on the side of the spring element 15 is formed as a projection 24 which engages in the groove 23.
  • Structural elements or shaped elements of this type can ensure that the spring element 15 or the spring washer or wave spring is arranged in a predetermined positional orientation on the hub 9. In particular, it can thus be ensured according to the poka yoke principle that the spring element 15 can only be arranged in exactly one predetermined positional orientation or installation position on the hub 9.
  • the spring element 15 embodied here as a wave spring has a plurality of wave crests 25 and wave troughs 26, of which only a few are provided with a reference number in the figures.
  • a spring element 15 in the form of a wave spring with four wave crests 25 and four wave troughs 26 it can be ensured that the wave troughs 26 of the spring element 15 come to lie in the area of the radial projections 22 of the shoulder 16. This enables the spring element 15 to be secured against detachment from the hub 9 by forming the projections 22 in a particularly simple manner.
  • a greater or lesser number of wave crests 25 and wave troughs 26 than the number of wave crests 25 and wave troughs 26 shown here by way of example can also be provided.
  • the projections 24 of the spring element 15, which correspond to the grooves 23, can also be formed in the region of a respective wave trough 26.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Pulleys (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Claims (12)

  1. Appareil ménager (1) pour l'entretien de linge, avec un tambour à linge (3) qui comprend un arbre d'entraînement (4), et avec une poulie (8) qui peut tourner autour d'un axe de rotation (A) de la poulie (8) au moyen d'un entraînement par courroie (5) de l'appareil ménager (1), la poulie (8) étant raccordée de façon bloquée en rotation à l'arbre d'entraînement (4), et un moyeu (9) de la poulie (8) comportant au moins un élément de liaison par la forme (10) qui est en prise avec au moins un élément de liaison par la forme (10) correspondant de l'arbre d'entraînement (4), caractérisé en ce que l'au moins un élément de liaison par la forme (10) du moyeu (9) s'étend en direction de l'axe de rotation (A) jusque dans une zone (16) du moyeu (9) dans laquelle un élément de ressort (15) est disposé sur le moyeu (9), un guidage de la poulie (8) le long de l'arbre d'entraînement (4) pouvant, par la longueur de l'élément de liaison par la forme (10) du moyeu (9), être obtenu lors de l'emboîtement du moyeu (9) sur l'arbre d'entraînement (4).
  2. Appareil ménager selon la revendication 1, caractérisé en ce que la zone du moyeu (9) est constituée en tant qu'épaulement (16) cylindrique creux de la poulie (8) sur le côté extérieur duquel l'élément de ressort (15) est disposé.
  3. Appareil ménager selon la revendication 1 ou 2, caractérisé en ce que l'au moins un élément de liaison par la forme (10) du moyeu (9) est constitué en direction de l'axe de rotation (A) sur une longueur totale du moyeu (A).
  4. Appareil ménager selon l'une des revendications précédentes, caractérisé en ce que l'élément de ressort (15) soumet un élément de palier (13) à une pression au moyen de laquelle l'arbre d'entraînement (4) est supporté en rotation autour de l'axe de rotation (A) dans un logement de palier de l'appareil ménager (1).
  5. Appareil ménager selon l'une des revendications précédentes, caractérisé en ce que, dans la zone (16) du moyeu (9), en particulier sur un bord (21), côté frontal, de la zone (16), il est constitué au moins une saillie (22) radiale qui bloque l'élément de ressort (15) contre un auto-desserrement du moyeu (9).
  6. Appareil ménager selon l'une des revendications précédentes, caractérisé en ce que l'élément de ressort (15) est constitué en tant que ressort ondulé qui, dans la direction circonférentielle, comporte au moins un sommet d'ondulation (25) et au moins un creux d'ondulation (26).
  7. Appareil ménager selon les revendications 5 et 6, caractérisé en ce que l'au moins une saillie (22) radiale est, dans la direction circonférentielle du ressort ondulé, disposée dans la zone de l'au moins un creux d'ondulation (26).
  8. Appareil ménager selon l'une des revendications précédentes, caractérisé en ce que l'élément de ressort (15) comporte au moins un premier élément structurel (24) qui est en prise avec au moins un deuxième élément structurel (23) constitué sur le moyeu (9).
  9. Appareil ménager selon la revendication 8, caractérisé en ce que l'un des éléments structurels est constitué en tant que saillie (24) radiale, et l'autre des éléments structurels en tant que creux (23).
  10. Appareil ménager selon la revendication 8 ou 9, caractérisé en ce que, du fait des éléments structurels (23, 24), une position de montage de l'élément de ressort (15) est imposée, dans laquelle l'élément de ressort (15) est disposé sur le moyeu (9).
  11. Appareil ménager selon l'une des revendications précédentes, caractérisé en ce qu'au moins le moyeu (9) de la poulie (8), en particulier la totalité de la poulie (8), est formé d'un alliage d'aluminium.
  12. Appareil ménager selon l'une des revendications précédentes, caractérisé en ce que les éléments de liaison par la forme correspondant entre eux du moyeu (9) et de l'arbre d'entraînement (4) sont constitués en tant que dents (10) d'une denture d'ajustement, en particulier de cannelures (11).
EP19209526.3A 2018-12-07 2019-11-15 Appareil électroménager destiné à l'entretien du linge pourvu d'une poulie à courroie à laquelle est fixé un élément ressort Active EP3663453B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL19209526T PL3663453T3 (pl) 2018-12-07 2019-11-15 Urządzenie gospodarstwa domowego do przetwarzania prania z kołem pasowym, z którym połączony jest element sprężynowy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018221208.2A DE102018221208A1 (de) 2018-12-07 2018-12-07 Haushaltsgerät zur Pflege von Wäschestücken mit einer Riemenscheibe, an welche ein Federelement angefügt ist

Publications (2)

Publication Number Publication Date
EP3663453A1 EP3663453A1 (fr) 2020-06-10
EP3663453B1 true EP3663453B1 (fr) 2022-01-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19209526.3A Active EP3663453B1 (fr) 2018-12-07 2019-11-15 Appareil électroménager destiné à l'entretien du linge pourvu d'une poulie à courroie à laquelle est fixé un élément ressort

Country Status (4)

Country Link
EP (1) EP3663453B1 (fr)
CN (1) CN111286923B (fr)
DE (1) DE102018221208A1 (fr)
PL (1) PL3663453T3 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100233427B1 (ko) * 1997-02-26 1999-12-01 윤종용 세탁기용 동력전달장치
US7131648B2 (en) * 2003-08-11 2006-11-07 Trostel, Ltd. Seal construction including a compressible spring mechanism for bearing preload
EP2557219B1 (fr) 2011-08-09 2014-11-05 Electrolux Home Products Corporation N.V. Machine de traitement du linge
DE102014206634A1 (de) * 2014-04-07 2015-10-08 BSH Hausgeräte GmbH Lageranordnung und Waschmaschine mit einer Lageranordnung
DE102014214949B4 (de) * 2014-07-30 2022-11-24 BSH Hausgeräte GmbH Haushalt-Wäschebehandlungsmaschine mit einer durch einen Elektromotor antreibbaren Wäschetrommel und Verfahren zum Montieren
DE102015222176A1 (de) * 2015-11-11 2017-05-11 BSH Hausgeräte GmbH Verfahren zum Herstellen einer Wellenanordnung für ein Haushaltsgerät, Wellenanordnung für ein Haushaltsgerät sowie Haushaltsgerät zur Pflege von Wäschestücken
KR102459160B1 (ko) * 2015-11-18 2022-10-27 삼성전자주식회사 세탁기
DE102015223310A1 (de) * 2015-11-25 2017-06-01 BSH Hausgeräte GmbH Wäschebehandlungsgerät
US10326323B2 (en) * 2015-12-11 2019-06-18 Whirlpool Corporation Multi-component rotor for an electric motor of an appliance
DE102016205167A1 (de) * 2016-03-30 2017-10-05 BSH Hausgeräte GmbH Haushaltsgerät zur Pflege von Wäschestücken mit einer mit einer Blindniete an eine Trommelwelle angebunden Riemenscheibe

Also Published As

Publication number Publication date
CN111286923B (zh) 2023-08-15
PL3663453T3 (pl) 2022-04-04
CN111286923A (zh) 2020-06-16
EP3663453A1 (fr) 2020-06-10
DE102018221208A1 (de) 2020-06-10

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