EP0575266B1 - Device for stopping a washing machine drum - Google Patents

Device for stopping a washing machine drum Download PDF

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Publication number
EP0575266B1
EP0575266B1 EP93420244A EP93420244A EP0575266B1 EP 0575266 B1 EP0575266 B1 EP 0575266B1 EP 93420244 A EP93420244 A EP 93420244A EP 93420244 A EP93420244 A EP 93420244A EP 0575266 B1 EP0575266 B1 EP 0575266B1
Authority
EP
European Patent Office
Prior art keywords
finger
rotating part
motor
interception
pinion
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
EP93420244A
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German (de)
French (fr)
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EP0575266A1 (en
Inventor
Jean Vollot
Pascal Escapa
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.)
Noalia Solutions SA
Original Assignee
Crouzet Appliance Controls SA
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Filing date
Publication date
Application filed by Crouzet Appliance Controls SA filed Critical Crouzet Appliance Controls SA
Publication of EP0575266A1 publication Critical patent/EP0575266A1/en
Application granted granted Critical
Publication of EP0575266B1 publication Critical patent/EP0575266B1/en
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
    • D06F37/30—Driving arrangements 
    • D06F37/302—Automatic drum positioning

Definitions

  • the present invention relates to washing machines and in particular those with top loading.
  • An object of the present invention is to provide a device for stopping the drum hatch at the top which is not very noisy and entirely reliable.
  • a drum stop device which can take a rest position, a position to intercept a finger secured to the drum (or any other part rotating with the drum), and a corresponding final position. at the desired position of the drum.
  • the rotary part is driven by a motor whose power on and off are controlled by a switch cooperating with a cam of the rotary part. At the end of a washing cycle, the rotary part is brought from the rest position to the intercept position where the finger of the drum is capable of engaging in a notch in the rotary part.
  • the drive motor of the rotating part In the interception position, the drive motor of the rotating part is stopped and the drum drive motor is rotated at slow speed in a predetermined direction, the energization of the drum motor being controlled by a second switch cooperating with a second cam of the rotating part.
  • the finger engages in the notch and spreads the rotating part towards its final position.
  • the drum motor is switched off, but the drum continues to rotate by inertia.
  • a brake acts on the rotating part at least between the intercept position and the final position and is provided so that the drum is stopped before the final position of the rotating part.
  • the rotating part under the action of the drum, stops in an intermediate position between the interception position and the final position.
  • the motor of the rotating part is started again to drive the rotating part to its final position while driving the drum to its stopped position.
  • the finger interception notch has a shape such that the finger remains trapped in the notch as soon as the rotating part has started to move away from its interception position in the direction of its final position.
  • the present invention relates more particularly to a stop device at a predetermined position of a drum fitted with a finger, driven by a motor to perform cycles of rotation in at least one predetermined direction around a first axis integral with a frame.
  • This device comprises a rotating part around a second axis parallel to the first and integral with the frame, capable of assuming a rest position, an interception position of said finger and a final position; a first cam of the rotary part cooperating with a first switch for, in the interception position, starting the drum motor in the predetermined direction and for switching off the motor as soon as the rotary part moves towards the position final with respect to its interception position; a brake acting on the rotating part, at least between the interception position and the final position; and a second motor actuated by a second switch cooperating with a second cam of the rotary part to bring the latter from the rest position to the interception position and to bring it to the final position as soon as it is moved towards the final position relative to its interception position.
  • the rotary part is driven by an output pinion of a reduction gear coupled to the second motor, this pinion being provided with a torque limiter forming said brake.
  • the rotating part is provided with a lever comprising a notch for intercepting said finger, this notch having a shape such that, at the interception position, the finger is capable of engaging in the notch and moving the rotating part away from its interception position in the direction of its final position; and when the rotating part is spaced apart by the finger, a wall of the notch opposes the return back of the finger.
  • the torque limiter of said pinion comprises the pinion not secured in rotation to an axis of the reduction gear, two washers, integral in rotation with the axis of the reduction gear, axially compressing the pinion under the stress of axially elastic washers .
  • the inertia of the assembly comprising the reduction gear and the second motor is such that the torque limiter acts before the second motor is rotated by a significant value under the action of the finger on the rotating part.
  • said lever is provided at its end with an elastic part which, if the finger is in a critical position which would block the passage of the rotating part from the rest position to the interception position, flexes by so that the finger can be pushed by the movement of the lever.
  • a finger 10 is capable of describing a circular trajectory T.
  • the finger 10 is integral with a drum, not shown, of a washing machine or any other part linked in rotation to the drum, such as a pulley drive.
  • the finger 10 is of cylindrical shape and extends parallel to the axis, not shown, of the drum. This axis is integral with a frame of the washing machine.
  • FIG. 1A of the device according to the invention comprises a base plate 12 fixed to the same frame which is integral with the axis of the drum.
  • This plate 12 comprises an axis 14 parallel to the axis of the drum, around which a rotary part 16 is articulated.
  • This rotary part 16 comprises a part 17 having the general shape of a disc (hereinafter called disc 17) and a lever 18 comprising a first side substantially radial to the disc 17 and a second side substantially tangential to the disc.
  • the device is located at the top left of the circle T and the lever 18 extends substantially upwards from the right part of the disc 17.
  • the tangential side of the lever 18 comprises, near the distal end of the lever, a notch 18-1 used to capture the finger 10 of the drum when the rotating part is in an intercept position described later.
  • the rotating part 16 is capable of taking three positions, namely, a rest position shown in the Figure 1A; an interception position of the finger 10, shown in Figure 2 described later; and a final position corresponding to the desired position of the drum shown in Figure 3 described later.
  • the rotating part 16 is brought to its various positions by an adequately controlled motor, as described later. It is driven from its interception position to its final position, first by finger 10 while braking this finger, then by the aforementioned motor. On reaching its final position, the rotating part drives the finger 10 which is then trapped in the notch 18-1.
  • the rotary part 16 has several superimposed levels, namely a first level comprising the lever 18, two additional levels corresponding respectively to a cam 20 shown in solid lines and to a cam 21 shown in dotted lines, and finally a fourth level corresponding to a toothing 22, the primitive circle of which is shown in phantom.
  • the teeth 22 serve to drive the rotary part 16 by a pinion 24 coupled to a motor via a reduction gear.
  • the motor and the reduction gear are arranged behind the plate 12 and are not visible in FIG. 1A.
  • the cam 20 comprises two large diameter parts, or bumps 20-1 and 20-2, juxtaposed and separated by a small diameter part, or hollow 20-3, of a few degrees.
  • the cam 21 includes a bump 21-1 of a few degrees. We will see later how to define the positions and the lengths of the hollows and bumps of the cams 20 and 21.
  • the cams 20 and 21 make it possible to identify the different positions of the rotary part 16. They replace conventional arrangements with position marking stops which cause noisy operation when moving parts come into abutment.
  • FIG. 1B represents an embodiment of the brake intended to brake the rotating part 16 when it intercepts the finger 10 of the drum.
  • this brake is produced in the form of a torque limiter associated with the pinion 24.
  • the pinion 24 comprises a thin central zone provided on either side with annular projecting friction zones.
  • the pinion 24 is not integral in rotation with the axis 32 of the outlet of the abovementioned reduction gear 34.
  • hard steel washers 36 and 37 sandwiching the central part of the pinion 24, are integral in rotation with the axis 32.
  • the axis 32 is of square section, as can be seen in FIG. 1A, and the washers 36 and 37 include a corresponding square hole.
  • the braking or torque limiting effect is obtained by washers 38 with axial elasticity, such as so-called “Belleville” washers, bearing between a shoulder of the axle 32 and the washer 37, the washer 36 coming into abutment against a washer 40 held by a screw 42 screwed at the end of the axis 32.
  • the position shown in Figure 1A corresponds to the rest position of the stop device.
  • the lever 18 is in a position away from the path T of the finger 10 and the drum can rotate freely. This rest position is determined by the start of the hump 20-1 of the cam 20, which actuates the switch 29 by means of the lever 26.
  • the rotating part 16 At the end of a washing cycle, the rotating part 16 must be brought to a position for intercepting the finger 10, shown in FIG. 2.
  • the programmer of the washing machine will be provided to connect the switch 29 of such so that it energizes the pinion motor 24 when the switch is activated.
  • the switch 29 is activated in the position of FIG. 1A, the pinion 24 is rotated clockwise and drives the rotating part 16 anticlockwise towards the position d 'interception.
  • FIG. 2 represents the interception position of the stop device.
  • the notch 18-1 is on the path of the finger 10 so that the finger 10 can fully engage in this notch.
  • the feeler of the lever 26 is located in the hollow 20-3 of the cam 20, which deactivates the switch 29 by stopping the rotation of the pinion 24.
  • the feeler of the lever 27 is lifted by the hump 21-1 of the cam 21, which causes the actuation of the switch 30.
  • the active switch 30 starts the drum motor at slow speed in a direction indicated by an arrow on the path T.
  • the rotary part 16 When the finger 10 engages in the notch 18-1, the rotary part 16 is driven anticlockwise while being braked by the torque-limiting pinion 24. As soon as the rotary part 16 begins to be driven by the finger 10, the feeler of the lever 27 falls behind the hump 21-1 of the cam 21 by deactivating the switch 30. The drum motor is switched off. At the same time, the start of the bump 20-2 of the cam 20 activates the switch 29 and the motor of the pinion 24 is again started in a direction corresponding to the drive of the rotating part 16 in the opposite direction. clockwise, that is to say in the same drive direction caused by finger 10. However, as previously indicated, the corresponding speed of rotation of pinion 24 can be neglected in front of the initial speed imposed on the rotating part 16 by the drum. The braking effect is not affected.
  • the braking torque of the brake pinion 24 is chosen so that the machine drum is stopped, under average conditions, when the rotary part 16 reaches an intermediate position between the interception position of FIG. 2 and a final position, shown in Figure 3, corresponding to the desired position of the drum.
  • Figure 3 shows the final position of the stop device of the previous figures.
  • the finger 10 has driven the rotary part 16 towards an intermediate position between the interception position of FIG. 2 and the final position of FIG. 3.
  • the bump 20-2 of the cam 20 always actuates the switch 29 for rotating the pinion 24.
  • the rotary part 16 therefore continues to rotate anti-clockwise until the position of FIG. 3 where the feeler of the lever 26 falls behind the bump 20-2 by deactivating the switch 29.
  • the motor of the pinion 24 is switched off.
  • the notch 18-1 of adequate shape, drives the finger 10 to bring the drum back to the desired position, corresponding to this final position.
  • a person skilled in the art will know how to choose the distance between the notch 18-1 and the axis 14 as a function of the value of the slow speed of the drum to avoid an impact during braking of the drum.
  • the higher the slow speed of the drum the longer this distance must be chosen so that the drum is braked over a longer stroke.
  • this notch has a suitable shape.
  • the wall of the notch 18-1 furthest from the axis 14 is substantially parallel to the path, and the proximal wall of the notch 18-1 is directed so that, as soon as the rotary part 16 is moved to the final position by the finger 10, this proximal wall prevents the finger from going back.
  • the finger 10 is trapped in the notch 18-1 as soon as it has started to drive the rotary part 16.
  • the rotating part 16 remains in the final position, for example, until a new washing program has been started.
  • the programmer reverses the function of switch 29, that is, the switch 29 then energizes the motor of the pinion 24 when the switch is deactivated.
  • the feeler of the lever 26 is in a hollow in the cam 20, the switch 29 is deactivated, and the pinion 24 is put into rotation.
  • the rotating part 26 starts to turn anti-clockwise and rejoins the rest position of FIG. 1A where the start of the bump 20-1 actuates the switch 29 by means of the lever 26 in stopping the pinion motor 24.
  • the finger 10 can, at the end of a cycle, take a critical position depending on the shape of the lever. In this critical position, the finger 10 blocks the lever 18 when the rotary part 16 is brought from the rest position to the interception position. In a position other than the critical position, the finger 10 can be pushed by the lever 18 in one direction or the other and does not block the movement of the lever.
  • the role of the tongue 18-2 previously described is to avoid blocking of the lever 18 by the finger 10.
  • the length of the radial side of the lever 18 is chosen so that its distal end, corresponding to a corner of the tongue 18- 2, come up against the finger 10 when the latter is in the critical position.
  • the tongue 18-2 flexes.
  • the new shape that the lever 18 takes thanks to this bending of the tongue 18-2 corresponds to a critical position different from the current position of the finger 10. Consequently, the finger 10 can be pushed by the lever 18. It will be pushed back in rear by the end zone of the lever 18.
  • the present invention is susceptible of numerous variants and modifications which will appear to those skilled in the art, in particular as regards the production of the braking device.
  • the braking device instead of providing the braking device at the pinion 24, it can be provided in the same way between the teeth 22 of the rotating part 16 and the rest of the rotating part.

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

Description

La présente invention concerne les machines à laver et en particulier celles à chargement par le haut.The present invention relates to washing machines and in particular those with top loading.

Pour charger ou décharger le tambour d'une machine à laver à chargement par le haut, il faut généralement faire tourner le tambour d'une position initiale vers une position où l'on peut accéder à une trappe du tambour. Cette opération de rotation du tambour nécessite un certain effort pour vaincre le balourd du tambour qui est particulièrement important si du linge contenu dans le tambour n'est pas essoré. Pendant le déchargement du tambour, celui-ci tend à retrouver sa position initiale et il faut donc le tenir en même temps qu'on le décharge. Si on le lâche malencontreusement pendant ces opérations, le tambour pourrait tourner avec sa trappe ouverte et du linge tomber au fond de la cuve.To load or unload the drum of a top-loading washing machine, you usually have to rotate the drum from an initial position to a position where you can access a drum door. This drum rotation operation requires a certain effort to overcome the imbalance of the drum which is particularly important if the linen contained in the drum is not spun. During the unloading of the drum, it tends to return to its initial position and must therefore be held at the same time as it is unloaded. If you accidentally let go of it during these operations, the drum could turn with its hatch open and laundry will fall to the bottom of the tank.

Il existe actuellement de nombreux dispositifs permettant d'arrêter un tambour de machine à laver en position trappe en haut à la fin d'un cycle de lavage, tel que celui décrit dans la demande de brevet européen EP-A-0 347 393. Toutefois, ces dispositifs sont très souvent bruyants lorsqu'ils entrent en action et ne fonctionnement souvent pas à tous les coups.There are currently many devices for stopping a washing machine drum in the hatch position. above at the end of a washing cycle, such as that described in European patent application EP-A-0 347 393. However, these devices are very often noisy when they come into action and often do not operate at every time.

Un objet de la présente invention est de prévoir un dispositif d'arrêt de tambour trappe en haut peu bruyant et entièrement fiable.An object of the present invention is to provide a device for stopping the drum hatch at the top which is not very noisy and entirely reliable.

Cet objet est atteint grâce à un dispositif d'arrêt de tambour qui peut prendre une position de repos, une position d'interception d'un doigt solidaire du tambour (ou de tout autre pièce tournant avec le tambour), et une position finale correspondant à la position recherchée du tambour.This object is achieved by a drum stop device which can take a rest position, a position to intercept a finger secured to the drum (or any other part rotating with the drum), and a corresponding final position. at the desired position of the drum.

La pièce rotative est entraînée par un moteur dont les mises sous et hors tension sont commandées par un interrupteur coopérant avec une came de la pièce rotative. A la fin d'un cycle de lavage, la pièce rotative est amenée de la position de repos vers la position d'interception où le doigt du tambour est susceptible de s'engager dans une encoche de la pièce rotative.The rotary part is driven by a motor whose power on and off are controlled by a switch cooperating with a cam of the rotary part. At the end of a washing cycle, the rotary part is brought from the rest position to the intercept position where the finger of the drum is capable of engaging in a notch in the rotary part.

Dans la position d'interception, le moteur d'entraînement de la pièce rotative est arrêté et le moteur d'entraînement du tambour est mis en rotation à vitesse lente dans un sens prédéterminé, la mise sous tension du moteur du tambour étant commandé par un deuxième interrupteur coopérant avec une deuxième came de la pièce rotative. Le doigt vient s'engager dans l'encoche et écarte la pièce rotative en direction de sa position finale. Dès que la pièce rotative est écartée de sa position d'interception, le moteur du tambour est mis hors tension, mais le tambour continue à tourner par inertie. Un frein agit sur la pièce rotative au moins entre la position d'interception et la position finale et est prévu pour que le tambour soit arrêté avant la position finale de la pièce rotative.In the interception position, the drive motor of the rotating part is stopped and the drum drive motor is rotated at slow speed in a predetermined direction, the energization of the drum motor being controlled by a second switch cooperating with a second cam of the rotating part. The finger engages in the notch and spreads the rotating part towards its final position. As soon as the rotating part is moved from its interception position, the drum motor is switched off, but the drum continues to rotate by inertia. A brake acts on the rotating part at least between the intercept position and the final position and is provided so that the drum is stopped before the final position of the rotating part.

Ainsi, la pièce rotative, sous l'action du tambour, s'arrête dans une position intermédiaire entre la position d'interception et la position finale. Dans cette position intermédiaire (ou avant qu'elle soit atteinte), le moteur de la pièce rotative est de nouveau mis en route pour entraîner la pièce rotative vers sa position finale tout en entrainant le tambour vers sa position d'arrêt. L'encoche d'interception du doigt présente une forme telle que le doigt reste prisonnier de l'encoche dès que la pièce rotative a commencé à s'écarter de sa position d'interception en direction de sa position finale.Thus, the rotating part, under the action of the drum, stops in an intermediate position between the interception position and the final position. In this intermediate position (or before it is reached), the motor of the rotating part is started again to drive the rotating part to its final position while driving the drum to its stopped position. The finger interception notch has a shape such that the finger remains trapped in the notch as soon as the rotating part has started to move away from its interception position in the direction of its final position.

La présente invention vise plus particulièrement un dispositif d'arrêt à une position prédéterminée d'un tambour muni d'un doigt, entraîné par un moteur pour effectuer des cycles de rotation dans au moins un sens prédéterminé autour d'un premier axe solidaire d'un bâti. Ce dispositif comprend une pièce rotative autour d'un deuxième axe parallèle au premier et solidaire du bâti, susceptible de prendre une position de repos, une position d'interception dudit doigt et une position finale ; une première came de la pièce rotative coopérant avec un premier interrupteur pour, dans la position d'interception, mettre en route le moteur du tambour dans le sens prédéterminé et pour mettre hors tension le moteur dès que la pièce rotative s'écarte vers la position finale par rapport à sa position d'interception ; un frein agissant sur la pièce rotative, au moins entre la position d'interception et la position finale ; et un deuxième moteur actionné par un deuxième interrupteur coopérant avec une deuxième came de la pièce rotative pour amener celle-ci de la position de repos vers la position d'interception et pour l'amener vers la position finale dès qu'elle est écartée vers la position finale par rapport à sa position d'interception.The present invention relates more particularly to a stop device at a predetermined position of a drum fitted with a finger, driven by a motor to perform cycles of rotation in at least one predetermined direction around a first axis integral with a frame. This device comprises a rotating part around a second axis parallel to the first and integral with the frame, capable of assuming a rest position, an interception position of said finger and a final position; a first cam of the rotary part cooperating with a first switch for, in the interception position, starting the drum motor in the predetermined direction and for switching off the motor as soon as the rotary part moves towards the position final with respect to its interception position; a brake acting on the rotating part, at least between the interception position and the final position; and a second motor actuated by a second switch cooperating with a second cam of the rotary part to bring the latter from the rest position to the interception position and to bring it to the final position as soon as it is moved towards the final position relative to its interception position.

Selon un mode de réalisation, la pièce rotative est entraînée par un pignon de sortie d'un réducteur couplé au deuxième moteur, ce pignon étant muni d'un limiteur de couple formant ledit frein.According to one embodiment, the rotary part is driven by an output pinion of a reduction gear coupled to the second motor, this pinion being provided with a torque limiter forming said brake.

Selon un mode de réalisation, la pièce rotative est munie d'un levier comprenant une encoche d'interception dudit doigt, cette encoche ayant une forme telle que, à la position d'interception, le doigt est susceptible de s'engager dans l'encoche et écarter la pièce rotative de sa position d'interception en direction de sa position finale ; et lorsque la pièce rotative est écartée par le doigt, une paroi de l'encoche s'oppose au retour en arrière du doigt.According to one embodiment, the rotating part is provided with a lever comprising a notch for intercepting said finger, this notch having a shape such that, at the interception position, the finger is capable of engaging in the notch and moving the rotating part away from its interception position in the direction of its final position; and when the rotating part is spaced apart by the finger, a wall of the notch opposes the return back of the finger.

Selon un mode de réalisation, le limiteur de couple dudit pignon comprend le pignon non solidarisé en rotation à un axe du réducteur, deux rondelles, solidaires en rotation de l'axe du réducteur, comprimant axialement le pignon sous la sollicitation de rondelles à élasticité axiale.According to one embodiment, the torque limiter of said pinion comprises the pinion not secured in rotation to an axis of the reduction gear, two washers, integral in rotation with the axis of the reduction gear, axially compressing the pinion under the stress of axially elastic washers .

Selon un mode de réalisation, l'inertie de l'ensemble comprenant le réducteur et le deuxième moteur est telle que le limiteur de couple agit avant que le deuxième moteur soit entraîné en rotation d'une valeur significative sous l'action du doigt sur la pièce rotative.According to one embodiment, the inertia of the assembly comprising the reduction gear and the second motor is such that the torque limiter acts before the second motor is rotated by a significant value under the action of the finger on the rotating part.

Selon un mode de réalisation, ledit levier est muni à son extrémité d'une partie élastique qui, si le doigt est dans une position critique qui bloquerait le passage de la pièce rotative de la position de repos vers la position d'interception, fléchit de sorte que le doigt puisse être poussé par le déplacement du levier.According to one embodiment, said lever is provided at its end with an elastic part which, if the finger is in a critical position which would block the passage of the rotating part from the rest position to the interception position, flexes by so that the finger can be pushed by the movement of the lever.

Ces objets, caractéristiques et avantages ainsi que d'autres de la présente invention seront décrits en détail dans la description suivante de modes de réalisation apparaissant dans les figures jointes parmi lesquelles :

  • la figure 1A représente un mode de réalisation de dispositif d'arrêt de tambour de machine à laver, selon la présente invention, dans une position de repos ;
  • la figure 1B représente une vue en coupe d'un élément servant de frein du dispositif de la figure 1A ;
  • la figure 2 représente le dispositif de la figure 1A dans une position d'interception d'un doigt solidaire du tambour ; et
  • la figure 3 représente le dispositif de la figure 1A dans une position finale.
These objects, characteristics and advantages as well as others of the present invention will be described in detail in the following description of embodiments appearing in the attached figures among which:
  • FIG. 1A shows an embodiment of a washing machine drum stop device, according to the present invention, in a rest position;
  • Figure 1B shows a sectional view of a brake element of the device of Figure 1A;
  • 2 shows the device of Figure 1A in an interception position of a finger secured to the drum; and
  • Figure 3 shows the device of Figure 1A in a final position.

Dans les figures, des mêmes éléments sont désignés par des mêmes références.In the figures, the same elements are designated by the same references.

A la figure 1A, un doigt 10 est susceptible de décrire une trajectoire circulaire T. Le doigt 10 est solidaire d'un tambour, non représenté, de machine à laver ou de tout autre pièce liée en rotation au tambour, telle qu'une poulie d'entraînement. Le doigt 10 est de forme cylindrique et s'étend parallèlement à l'axe, non représenté, du tambour. Cet axe est solidaire d'un bâti de la machine à laver.In FIG. 1A, a finger 10 is capable of describing a circular trajectory T. The finger 10 is integral with a drum, not shown, of a washing machine or any other part linked in rotation to the drum, such as a pulley drive. The finger 10 is of cylindrical shape and extends parallel to the axis, not shown, of the drum. This axis is integral with a frame of the washing machine.

En dehors du cercle défini par la trajectoire T est disposé un dispositif d'arrêt selon l'invention. Le mode de réalisation représenté à la figure 1A du dispositif selon l'invention comprend une plaque de base 12 fixée au même bâti dont est solidaire l'axe du tambour. Cette plaque 12 comprend un axe 14 parallèle à l'axe du tambour, autour duquel est articulé une pièce rotative 16. Cette pièce rotative 16 comprend une partie 17 ayant une forme générale de disque (appelée ci-après disque 17) et un levier 18 comprenant un premier côté sensiblement radial au disque 17 et un deuxième côté sensiblement tangentiel au disque. Dans la figure, le dispositif est situé en haut à gauche du cercle T et le levier 18 s'étend sensiblement vers le haut depuis la partie droite du disque 17. Le côté tangentiel du levier 18 comprend, à proximité de l'extrémité distale du levier, une encoche 18-1 servant à capturer le doigt 10 du tambour lorsque la pièce rotative est dans une position d'interception décrite ultérieurement.Outside the circle defined by the path T is arranged a stop device according to the invention. The embodiment shown in Figure 1A of the device according to the invention comprises a base plate 12 fixed to the same frame which is integral with the axis of the drum. This plate 12 comprises an axis 14 parallel to the axis of the drum, around which a rotary part 16 is articulated. This rotary part 16 comprises a part 17 having the general shape of a disc (hereinafter called disc 17) and a lever 18 comprising a first side substantially radial to the disc 17 and a second side substantially tangential to the disc. In the figure, the device is located at the top left of the circle T and the lever 18 extends substantially upwards from the right part of the disc 17. The tangential side of the lever 18 comprises, near the distal end of the lever, a notch 18-1 used to capture the finger 10 of the drum when the rotating part is in an intercept position described later.

On verra ultérieurement le rôle d'une languette 18-2 de l'extrémité distale du levier 18, formée par la réalisation d'une fente s'étendant vers l'intérieur du levier 18 à partir de son bord radial.We will see later the role of a tongue 18-2 of the distal end of the lever 18, formed by the production of a slot extending towards the inside of the lever 18 from its radial edge.

La pièce rotative 16 est susceptible de prendre trois positions, à savoir, une position de repos représentée dans la figure 1A ; une position d'interception du doigt 10, représentée dans la figure 2 décrite ultérieurement ; et une position finale correspondant à la position souhaitée du tambour représentée dans la figure 3 décrite ultérieurement. La pièce rotative 16 est amenée à ses diverses positions par un moteur adéquatement commandé, de manière décrite ultérieurement. Elle est entraînée de sa position d'interception vers sa position finale, d'abord par le doigt 10 tout en freinant ce doigt, puis par le moteur susmentionné. En rejoignant sa position finale, la pièce rotative entraîne le doigt 10 qui se trouve alors être prisonnier de l'encoche 18-1.The rotating part 16 is capable of taking three positions, namely, a rest position shown in the Figure 1A; an interception position of the finger 10, shown in Figure 2 described later; and a final position corresponding to the desired position of the drum shown in Figure 3 described later. The rotating part 16 is brought to its various positions by an adequately controlled motor, as described later. It is driven from its interception position to its final position, first by finger 10 while braking this finger, then by the aforementioned motor. On reaching its final position, the rotating part drives the finger 10 which is then trapped in the notch 18-1.

La pièce rotative 16 est à plusieurs niveaux superposés, à savoir un premier niveau comprenant le levier 18, deux niveaux supplémentaires correspondant respectivement à une came 20 représentée en trait plein et à une came 21 représentée en pointillés, et enfin un quatrième niveau correspondant à une denture 22 dont le cercle primitif est représenté en trait mixte. La denture 22 sert à entraîner la pièce rotative 16 par un pignon 24 couplé à un moteur par l'intermédiaire d'un réducteur. Le moteur et le réducteur sont disposés derrière la plaque 12 et ne sont pas visibles dans la figure 1A.The rotary part 16 has several superimposed levels, namely a first level comprising the lever 18, two additional levels corresponding respectively to a cam 20 shown in solid lines and to a cam 21 shown in dotted lines, and finally a fourth level corresponding to a toothing 22, the primitive circle of which is shown in phantom. The teeth 22 serve to drive the rotary part 16 by a pinion 24 coupled to a motor via a reduction gear. The motor and the reduction gear are arranged behind the plate 12 and are not visible in FIG. 1A.

Deux extrémités respectives, ou palpeurs, de deux leviers 26 et 27 articulés sur la plaque 12 de part et d'autre du pignon 24 viennent respectivement palper les cames 20 et 21. Les autres extrémités des leviers 26 et 27 agissent respectivement sur des interrupteurs 29 et 30. Comme on le verra ultérieurement, l'interrupteur 29 agit sur le moteur d'entraînement du pignon 24 et l'interrupteur 30 agit sur le moteur du tambour. On aurait pu envisager que les interrupteurs 29 et 30 viennent directement palper les cames 20 et 21, mais comme cela est représenté, la disposition à deux leviers permet une réalisation plus compacte du dispositif et de regrouper en un seul endroit les broches de connexion des interrupteurs 29 et 30.Two respective ends, or feelers, of two levers 26 and 27 articulated on the plate 12 on either side of the pinion 24 come to palpate the cams 20 and 21 respectively. The other ends of the levers 26 and 27 act respectively on switches 29 and 30. As will be seen later, the switch 29 acts on the drive motor of the pinion 24 and the switch 30 acts on the motor of the drum. One could have envisaged that the switches 29 and 30 come directly to palpate the cams 20 and 21, but as shown, the arrangement with two levers allows a more compact embodiment of the device and to group in one place the connection pins of the switches 29 and 30.

La came 20 comprend deux parties de grand diamètre, ou bosses 20-1 et 20-2, juxtaposées et séparées par une partie de faible diamètre, ou creux 20-3, de quelques degrés. La came 21 comprend une bosse 21-1 de quelques degrés. On verra ultérieurement comment il faut définir les positions et les longueurs des creux et des bosses des cames 20 et 21.The cam 20 comprises two large diameter parts, or bumps 20-1 and 20-2, juxtaposed and separated by a small diameter part, or hollow 20-3, of a few degrees. The cam 21 includes a bump 21-1 of a few degrees. We will see later how to define the positions and the lengths of the hollows and bumps of the cams 20 and 21.

Les cames 20 et 21 permettent de repérer les différentes positions de la pièce rotative 16. Elles remplacent des dispositions classiques à butées de repérage de position qui entraînent un fonctionnement bruyant lorsque des pièces mobiles viennent en butée.The cams 20 and 21 make it possible to identify the different positions of the rotary part 16. They replace conventional arrangements with position marking stops which cause noisy operation when moving parts come into abutment.

La figure 1B représente un mode de réalisation de frein destiné à freiner la pièce rotative 16 lorsqu'elle intercepte le doigt 10 du tambour. Selon le mode de réalisation représenté, ce frein est réalisé sous la forme d'un limiteur de couple associé au pignon 24. Le pignon 24 comprend une zone centrale mince munie de part et d'autre de zones annulaires de frottement en saillie. Le pignon 24 n'est pas solidaire en rotation de l'axe 32 de sortie du réducteur susmentionné 34. Par contre, des rondelles en acier dur 36 et 37 prenant en sandwich la partie centrale du pignon 24, sont solidaires en rotation de l'axe 32. Pour cela, l'axe 32 est à section carrée, comme cela est visible dans la figure 1A, et les rondelles 36 et 37 comprennent un trou carré correspondant. L'effet de freinage, ou de limitation de couple, est obtenu par des rondelles 38 à élasticité axiale, telles que des rondelles dites "Belleville", s'appuyant entre un épaulement de l'axe 32 et la rondelle 37, la rondelle 36 venant en butée contre une rondelle 40 maintenue par une vis 42 vissée en bout de l'axe 32.FIG. 1B represents an embodiment of the brake intended to brake the rotating part 16 when it intercepts the finger 10 of the drum. According to the embodiment shown, this brake is produced in the form of a torque limiter associated with the pinion 24. The pinion 24 comprises a thin central zone provided on either side with annular projecting friction zones. The pinion 24 is not integral in rotation with the axis 32 of the outlet of the abovementioned reduction gear 34. On the other hand, hard steel washers 36 and 37 sandwiching the central part of the pinion 24, are integral in rotation with the axis 32. For this, the axis 32 is of square section, as can be seen in FIG. 1A, and the washers 36 and 37 include a corresponding square hole. The braking or torque limiting effect is obtained by washers 38 with axial elasticity, such as so-called "Belleville" washers, bearing between a shoulder of the axle 32 and the washer 37, the washer 36 coming into abutment against a washer 40 held by a screw 42 screwed at the end of the axis 32.

Avec cette configuration, lorsque le couple appliqué au pignon 24 est suffisant, celui-ci se met à tourner avec frottement par rapport aux rondelles 36 et 37. Le coefficient de réduction du réducteur 34 est élevé pour que la pièce rotative 16 soit déplacée lentement afin que l'on puisse, notamment, capter de façon fiable sa position à l'aide des cames 20 et 21. Il s'avère que l'inertie présentée par le réducteur 34 et son moteur est si importante qu'un couple de freinage suffisant du pignon frein 24 est atteint avant que l'on puisse déplacer de façon significative le moteur en agissant sur le pignon 24. Ainsi, lorsque le moteur d'entraînement du pignon 24 est à l'arrêt, ce pignon 24 sert de frein à la pièce rotative 16. L'action de freinage se produit même si le moteur du pignon 24 est en train de tourner à sa vitesse nominale, car la vitesse correspondante du pignon 24 est bien inférieure à la vitesse que l'on veut freiner (vitesse infligée au pignon 24 par le tambour lors de l'interception du doigt 10).With this configuration, when the torque applied to the pinion 24 is sufficient, it starts to rotate with friction with respect to the washers 36 and 37. The reduction coefficient of the reduction gear 34 is high so that the rotary part 16 is moved slowly so as to that we can, in particular, reliably capture its position using cams 20 and 21. It turns out that the inertia presented by the reduction gear 34 and its motor is so great that a sufficient braking torque of the brake pinion 24 is reached before the motor can be moved significantly by acting on the pinion 24. Thus, when the motor for driving the pinion 24 is stopped, this pinion 24 acts as a brake on the rotating part 16. The action of braking occurs even if the motor of the pinion 24 is running at its nominal speed, because the corresponding speed of the pinion 24 is much lower than the speed which one wishes to brake (speed imposed on the pinion 24 by the drum during interception of finger 10).

La position représentée à la figure 1A correspond à la position de repos du dispositif d'arrêt. Le levier 18 est dans une position à l'écart de la trajectoire T du doigt 10 et le tambour peut tourner librement. Cette position de repos est déterminée par le début de la bosse 20-1 de la came 20, qui actionne l'interrupteur 29 par l'intermédiaire du levier 26.The position shown in Figure 1A corresponds to the rest position of the stop device. The lever 18 is in a position away from the path T of the finger 10 and the drum can rotate freely. This rest position is determined by the start of the hump 20-1 of the cam 20, which actuates the switch 29 by means of the lever 26.

A la fin d'un cycle de lavage, la pièce rotative 16 doit être amenée vers une position d'interception du doigt 10, représentée à la figure 2. Le programmateur de la machine à laver sera prévu pour connecter l'interrupteur 29 de telle sorte qu'il mette sous tension le moteur du pignon 24 lorsque l'interrupteur est activé. L'interrupteur 29 est activé dans la position de la figure 1A, le pignon 24 est mis en rotation dans le sens des aiguilles d'une montre et entraîne la pièce rotative 16 dans le sens contraire des aiguilles d'une montre vers la position d'interception.At the end of a washing cycle, the rotating part 16 must be brought to a position for intercepting the finger 10, shown in FIG. 2. The programmer of the washing machine will be provided to connect the switch 29 of such so that it energizes the pinion motor 24 when the switch is activated. The switch 29 is activated in the position of FIG. 1A, the pinion 24 is rotated clockwise and drives the rotating part 16 anticlockwise towards the position d 'interception.

La figure 2 représente la position d'interception du dispositif d'arrêt. Dans cette position, l'encoche 18-1 se trouve sur la trajectoire du doigt 10 de sorte que le doigt 10 puisse s'engager pleinement dans cette encoche. Le palpeur du levier 26 se trouve dans le creux 20-3 de la came 20, ce qui désactive l'interrupteur 29 en arrêtant la rotation du pignon 24.FIG. 2 represents the interception position of the stop device. In this position, the notch 18-1 is on the path of the finger 10 so that the finger 10 can fully engage in this notch. The feeler of the lever 26 is located in the hollow 20-3 of the cam 20, which deactivates the switch 29 by stopping the rotation of the pinion 24.

Cette position ainsi que les autres sont atteintes avec une précision suffisante, car le coefficient du réducteur 34 du pignon 24 est si important que la pièce rotative 16 tourne très peu entre l'instant où le moteur du pignon 24 est mis hors tension et l'instant où ce moteur s'arrête. Dans le cas où le moteur du pignon 24 est synchrone, l'arrêt de celui-ci est pratiquement instantané.This position as well as the others are reached with sufficient precision, because the coefficient of the reduction gear 34 of the pinion 24 is so important that the rotating part 16 rotates very little between the moment when the motor of the pinion 24 is switched off and the instant this engine stops. In the case where the motor of the pinion 24 is synchronous, the stopping thereof is practically instantaneous.

Dans la position d'interception, le palpeur du levier 27 est levé par la bosse 21-1 de la came 21, ce qui provoque l'actionnement de l'interrupteur 30. L'interrupteur 30 actif met en marche le moteur du tambour à vitesse lente selon un sens indiqué par une flèche sur la trajectoire T.In the interception position, the feeler of the lever 27 is lifted by the hump 21-1 of the cam 21, which causes the actuation of the switch 30. The active switch 30 starts the drum motor at slow speed in a direction indicated by an arrow on the path T.

Lorsque le doigt 10 s'engage dans l'encoche 18-1, la pièce rotative 16 est entrainée dans le sens contraire des aiguilles d'une montre tout en étant freinée par le pignon à limiteur de couple 24. Dès que la pièce rotative 16 commence à être entraînée par le doigt 10, le palpeur du levier 27 tombe derrière la bosse 21-1 de la came 21 en désactivant l'interrupteur 30. Le moteur du tambour est mis hors tension. En même temps, le début de la bosse 20-2 de la came 20 active l'interrupteur 29 et le moteur du pignon 24 est de nouveau mis en marche dans un sens correspondant à l'entraînement de la pièce rotative 16 dans le sens contraire des aiguilles d'une montre, c'est-à-dire dans le même sens d'entraînement provoqué par le doigt 10. Toutefois, comme on l'a précedemment indiqué, la vitesse de rotation correspondante du pignon 24 peut être négligée devant la vitesse initiale infligée à la pièce rotative 16 par le tambour. L'effet de freinage n'est pas affecté.When the finger 10 engages in the notch 18-1, the rotary part 16 is driven anticlockwise while being braked by the torque-limiting pinion 24. As soon as the rotary part 16 begins to be driven by the finger 10, the feeler of the lever 27 falls behind the hump 21-1 of the cam 21 by deactivating the switch 30. The drum motor is switched off. At the same time, the start of the bump 20-2 of the cam 20 activates the switch 29 and the motor of the pinion 24 is again started in a direction corresponding to the drive of the rotating part 16 in the opposite direction. clockwise, that is to say in the same drive direction caused by finger 10. However, as previously indicated, the corresponding speed of rotation of pinion 24 can be neglected in front of the initial speed imposed on the rotating part 16 by the drum. The braking effect is not affected.

Le couple de freinage du pignon frein 24 est choisi de sorte que le tambour de la machine soit arrêté, dans des conditions moyennes, lorsque la pièce rotative 16 atteint une position intermédiaire entre la position d'interception de la figure 2 et une position finale, représentée en figure 3, correspondant à la position souhaitée du tambour.The braking torque of the brake pinion 24 is chosen so that the machine drum is stopped, under average conditions, when the rotary part 16 reaches an intermediate position between the interception position of FIG. 2 and a final position, shown in Figure 3, corresponding to the desired position of the drum.

La figure 3 représente la position finale du dispositif d'arrêt des figures précédentes. Dans des conditions normales, le doigt 10 a entraîné la pièce rotative 16 vers une position intermédiaire entre la position d'interception de la figure 2 et la position finale de la figure 3. Dans cette position intermédiaire, la bosse 20-2 de la came 20 actionne toujours l'interrupteur 29 de mise en rotation du pignon 24. La pièce rotative 16 continue donc à tourner dans le sens contraire des aiguilles d'une montre jusqu'à la position de la figure 3 où le palpeur du levier 26 tombe derrière la bosse 20-2 en désactivant l'interrupteur 29. Le moteur du pignon 24 est mis hors tension. En rejoignant la position finale, l'encoche 18-1, de forme adéquate, entraîne le doigt 10 pour ramener le tambour à la position souhaitée, correspondant à cette position finale.Figure 3 shows the final position of the stop device of the previous figures. Under normal conditions, the finger 10 has driven the rotary part 16 towards an intermediate position between the interception position of FIG. 2 and the final position of FIG. 3. In this intermediate position, the bump 20-2 of the cam 20 always actuates the switch 29 for rotating the pinion 24. The rotary part 16 therefore continues to rotate anti-clockwise until the position of FIG. 3 where the feeler of the lever 26 falls behind the bump 20-2 by deactivating the switch 29. The motor of the pinion 24 is switched off. On reaching the final position, the notch 18-1, of adequate shape, drives the finger 10 to bring the drum back to the desired position, corresponding to this final position.

L'homme du métier saura convenablement choisir la distance entre l'encoche 18-1 et l'axe 14 en fonction de la valeur de la vitesse lente du tambour pour éviter un choc lors du freinage du tambour. Notamment, plus la vitesse lente du tambour est élevée, plus cette distanoe doit être choisie longue de sorte que le tambour soit freiné sur une course plus longue.A person skilled in the art will know how to choose the distance between the notch 18-1 and the axis 14 as a function of the value of the slow speed of the drum to avoid an impact during braking of the drum. In particular, the higher the slow speed of the drum, the longer this distance must be chosen so that the drum is braked over a longer stroke.

Pour que le doigt 10 puisse être entraîné par l'encoche 18-1, cette encoche a une forme adaptée. Dans la position d'interception de la figure 2, la paroi de l'encoche 18-1 la plus éloignée de l'axe 14 (paroi distale) est sensiblement parallèle à la trajectoire, et la paroi proximale de l'encoche 18-1 est dirigée de sorte que, dès que la pièce rotative 16 est déplacée vers la position finale par le doigt 10, cette paroi proximale empêche le retour en arrière du doigt. Ainsi, le doigt 10 est prisonnier de l'encoche 18-1 dès qu'il a commencé à entraîner la pièce rotative 16.So that the finger 10 can be driven by the notch 18-1, this notch has a suitable shape. In the interception position of Figure 2, the wall of the notch 18-1 furthest from the axis 14 (distal wall) is substantially parallel to the path, and the proximal wall of the notch 18-1 is directed so that, as soon as the rotary part 16 is moved to the final position by the finger 10, this proximal wall prevents the finger from going back. Thus, the finger 10 is trapped in the notch 18-1 as soon as it has started to drive the rotary part 16.

La pièce rotative 16 reste dans la position finale, par exemple, tant que l'on n'aura pas commencé un nouveau programme de lavage. Au début d'un nouveau programme de lavage, le programmateur inverse la fonction de l'interrupteur 29, c'est-à-dire que l'interrupteur 29 met alors le moteur du pignon 24 sous tension lorsque l'interrupteur est désactivé. Dans la position finale de la figure 3, le palpeur du levier 26 se trouve dans un creux de la came 20, l'interrupteur 29 est désactivé, et le pignon 24 est mis en rotation. La pièce rotative 26 se met à tourner dans le sens contraire des aiguilles d'une montre et rejoint la position de repos de la figure 1A où le début de la bosse 20-1 actionne l'interrupteur 29 par l'intermédiaire du levier 26 en arrêtant le moteur du pignon 24.The rotating part 16 remains in the final position, for example, until a new washing program has been started. At the start of a new washing program, the programmer reverses the function of switch 29, that is, the switch 29 then energizes the motor of the pinion 24 when the switch is deactivated. In the final position of FIG. 3, the feeler of the lever 26 is in a hollow in the cam 20, the switch 29 is deactivated, and the pinion 24 is put into rotation. The rotating part 26 starts to turn anti-clockwise and rejoins the rest position of FIG. 1A where the start of the bump 20-1 actuates the switch 29 by means of the lever 26 in stopping the pinion motor 24.

Quelle que soit la forme du levier 18, le doigt 10 peut, à la fin d'un cycle, prendre une position critique dépendant de la forme du levier. Dans cette position critique, le doigt 10 bloque le levier 18 lorsque la pièce rotative 16 est amenée de la position de repos vers la position d'interception. Dans une position autre que la position critique, le doigt 10 peut être poussé par le levier 18 dans un sens ou dans l'autre et ne bloque pas le déplacement du levier.Whatever the shape of the lever 18, the finger 10 can, at the end of a cycle, take a critical position depending on the shape of the lever. In this critical position, the finger 10 blocks the lever 18 when the rotary part 16 is brought from the rest position to the interception position. In a position other than the critical position, the finger 10 can be pushed by the lever 18 in one direction or the other and does not block the movement of the lever.

Le rôle de la languette 18-2 précédemment décrite est d'éviter le blocage du levier 18 par le doigt 10. La longueur du côté radial du levier 18 est choisie de sorte que son extrémité distale, correspondant à un coin de la languette 18-2, vienne buter contre le doigt 10 lorsque ce dernier est dans la position critique. En venant buter contre le doigt 10, la languette 18-2 fléchit. La nouvelle forme que prend le levier 18 grâce à cette flexion de la languette 18-2 correspond à une position critique différente de la position courante du doigt 10. Par conséquent, le doigt 10 peut être poussé par le levier 18. Il sera repoussé en arrière par la zone extrême du levier 18.The role of the tongue 18-2 previously described is to avoid blocking of the lever 18 by the finger 10. The length of the radial side of the lever 18 is chosen so that its distal end, corresponding to a corner of the tongue 18- 2, come up against the finger 10 when the latter is in the critical position. Coming to abut against finger 10, the tongue 18-2 flexes. The new shape that the lever 18 takes thanks to this bending of the tongue 18-2 corresponds to a critical position different from the current position of the finger 10. Consequently, the finger 10 can be pushed by the lever 18. It will be pushed back in rear by the end zone of the lever 18.

La présente invention est susceptible de nombreuses variantes et modifications qui apparaîtront à l'homme du métier, notamment en ce qui concerne la réalisation du dispositif de freinage. Par exemple, au lieu de prévoir le dispositif de freinage au niveau du pignon 24, celui-ci peut être prévu de la même manière entre la denture 22 de la pièce rotative 16 et le reste de la pièce rotative. On peut également prévoir une pièce rotative 16 constamment freinée, l'effort de freinage étant vaincu par le couple important fourni par le pignon 24 grâce à la démultiplication du réducteur.The present invention is susceptible of numerous variants and modifications which will appear to those skilled in the art, in particular as regards the production of the braking device. For example, instead of providing the braking device at the pinion 24, it can be provided in the same way between the teeth 22 of the rotating part 16 and the rest of the rotating part. One can also provide a rotating part 16 constantly braked, the braking force being overcome by the large torque provided by the pinion 24 through the reduction of the reduction gear.

L'homme du métier saura utiliser les informations des interrupteurs 29 et 30 en association avec un programmateur pour réaliser les fonctions décrites.Those skilled in the art will be able to use the information from switches 29 and 30 in association with a programmer to perform the functions described.

Claims (6)

  1. A device for stopping at a predetermined position a drum driven by a motor for achieving rotation cycles in at least one predetermined direction about a first axis integral with a frame, including:
    - a part (16) rotating about a second axis (14) parallel with the first axis and integral with the frame;
    - a first cam (21) of the rotating part cooperating with a first switch (30), and
    - a second motor actuated by a second switch (29),
    characterized in that:
    - the rotating part is provided with a lever (18) including a notch (18-1) for intercepting a finger (10) integral with the drum and that can have a rest position, a position for intercepting said finger, and an end position;
    - a brake (24) acts on the rotating part, at least between the interception position and the end position;
    - the first cam, in the interception position, causes the motor to rotate the drum in the predetermined direction and switches off the motor as soon as the rotating part deviates towards the end position with respect to its interception position;
    - the second motor cooperates with a second cam (20) of the rotating part to drive the part from the rest position towards the interception position and drives the part to the end position as soon as it deviates towards the end position with respect to its interception position.
  2. The device of claim 1, characterized in that said rotating part (16) is driven by an output pinion (24) of a reducing gear (34) coupled to the second motor, said pinion having a torque limiter forming said brake.
  3. The device of claim 1, characterized in that the interception notch (18-1) is shaped so that:
    - at the interception position, the finger can engage into the notch and deviate the rotating part from its interception position towards its end position; and
    - when the rotating part is deviated by the finger, a wall of the notch prevents the finger from returning.
  4. The device of claim 2, characterized in that said torque limiter of said pinion (24) includes the pinion (24) which rotates freely with respect to a shaft (32) of the reducing gear (34), two rings (36, 37) rotating with the shaft of the reducing gear, axially compressing the pinion under the action of axial elasticity rings (38).
  5. The device of claim 2, characterized in that the inertia of the assembly including the reducing gear (34) and the second motor is such that the torque limiter acts before the second motor is significantly rotated by the finger (10) acting on the rotating part (16).
  6. The device of claim 3, characterized in that said lever (18) has at one end an elastic portion (18-2) which bends so that the finger (10) is pushed by the displacement of the lever if the finger (10) is in a critical position which would block the passage of the rotating part (16) from the rest position towards the end position.
EP93420244A 1992-06-18 1993-06-14 Device for stopping a washing machine drum Expired - Lifetime EP0575266B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9207758A FR2692604B1 (en) 1992-06-18 1992-06-18 Washing machine drum stop device.
FR9207758 1992-06-18

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EP0575266A1 EP0575266A1 (en) 1993-12-22
EP0575266B1 true EP0575266B1 (en) 1996-12-18

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FR (1) FR2692604B1 (en)

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CN109667111B (en) * 2019-01-03 2022-09-23 无锡小天鹅电器有限公司 Drum type washing machine's stopper and drum type washing machine

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DE6603508U (en) * 1965-08-19 1969-10-09 Siemens-Electrogeraete Gmbh DEVICE FOR ACHIEVING THE DRUM STANDSTILL OF A CLOTHED LAUNDRY MACHINE IN THE OPERATING POSITION.
DE2311956A1 (en) * 1973-03-08 1974-09-12 Siemens Elektrogeraete Gmbh DEVICE FOR ACHIEVING THE DRUM STANDSTILL OF A CASE LOADABLE DRUM WASHING MACHINE IN THE OPERATING POSITION
IT1218255B (en) * 1988-06-17 1990-04-12 Smeg Spa AUTOMATIC LOCKING DEVICE IN A PREFIXED POSITION OF THE WASHING MACHINE WASHING BASKET

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FR2692604B1 (en) 1994-10-14
EP0575266A1 (en) 1993-12-22
DE69306665D1 (en) 1997-01-30
DE69306665T2 (en) 1997-06-12
FR2692604A1 (en) 1993-12-24

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