EP3165664B1 - Groupe de lavage pour machines à laver le linge - Google Patents

Groupe de lavage pour machines à laver le linge Download PDF

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Publication number
EP3165664B1
EP3165664B1 EP15193109.4A EP15193109A EP3165664B1 EP 3165664 B1 EP3165664 B1 EP 3165664B1 EP 15193109 A EP15193109 A EP 15193109A EP 3165664 B1 EP3165664 B1 EP 3165664B1
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EP
European Patent Office
Prior art keywords
washing
washing tub
coupling pin
shaped
cylindrical
Prior art date
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Active
Application number
EP15193109.4A
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German (de)
English (en)
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EP3165664A1 (fr
Inventor
Vittorio Perosa
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.)
Electrolux Appliances AB
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Electrolux Appliances AB
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.)
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Publication date
Application filed by Electrolux Appliances AB filed Critical Electrolux Appliances AB
Priority to EP15193109.4A priority Critical patent/EP3165664B1/fr
Priority to US15/341,618 priority patent/US20170137984A1/en
Publication of EP3165664A1 publication Critical patent/EP3165664A1/fr
Application granted granted Critical
Publication of EP3165664B1 publication Critical patent/EP3165664B1/fr
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • D06F37/206—Mounting of motor
    • 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 washing group for laundry washing machines.
  • the present invention relates to a washing group for home laundry washing machines, to which the following description refers purely by way of example without this implying any loss of generality.
  • a substantially parallelepiped-shaped, outer boxlike casing structured for resting on the floor; an approximately cylindrical, hollow washing tub which is usually arranged substantially horizontally inside the casing and is provided with a laundry loading and unloading mouth that directly faces a large pass-through opening which is formed either in the top or in the front wall of the casing and is dimensioned for allowing an easy manual loading and unloading of the laundry inside the washing tub; a substantially cylindrical, hollow drum which is fitted in axially rotatable manner inside the washing tub and is structured for accommodating the laundry to be washed; an elastically-deformable bellows which watertight connects the mouth of the washing tub to the pass-through opening formed in the top or front wall of the casing; and a manually-operated door which is hinged to the top or front wall of the casing so as to be able to rotate to and from a closing position in which the door closes the pass-through opening for watertight sealing the washing tub.
  • an electric motor which is rigidly attached outside and underneath the washing tub, and is mechanically connected to the rotatable drum thus to be able to drive into rotation the drum inside the washing tub; an electrically-operated, water and detergent supply assembly which is structured for selectively feeding into the washing tub, according to the selected washing cycle, a given amount of detergent, softener and/or other washing agent suitably mixed with the fresh water arriving from the water mains, or simply a given amount of fresh water arriving from the water mains; an electric heating device located inside the washing tub and capable of selectively heating up the water contained into the washing tub; and finally an electronic central control unit which controls the electric motor, the heating device and the water and detergent supply assembly to selectively perform one of the user-selectable washing cycles stored in the same central control unit.
  • the washing tub, the rotatable drum, the heating device and the electric motor are generally assembled to one another on a separate assembly line so as to form a so-called washing group which is subsequently inserted into the outer casing of the laundry washing machine.
  • EP2775024A1 discloses a washing group wherein the electric motor is firmly enclosed between a pair of reciprocally-faced, cup-shaped end-shields which are arranged coaxial to the longitudinal axis of the motor, and each of which is provided with a pair of outwards-projecting connecting arms structured for being rigidly fastened to the bottom of the washing tub.
  • each connecting arm protruding from the front end-shield i.e. from the end-shield engaged in pass-through and axially rotatable manner by the driving shaft of the electric motor
  • a transversal hollow seat which is frustoconical in shape and is dimensioned to be axially fitted onto a corresponding, complementary-shaped, frustoconical coupling pin which is integrally formed on the bottom portion of the washing tub and extends outside of the washing tub coaxial to a reference axis parallel to the longitudinal axis of the motor.
  • An axial screw moreover fastens the distal end of each connecting arm to the corresponding frustoconical-shaped coupling pin.
  • each connecting arm protruding from the rear end-shield is provided with a transversal, pass-through hole which is cylindrical in shape and is dimensioned to be axially fitted onto a corresponding, complementary-shaped cylindrical coupling pin which is integrally formed on the bottom portion of the washing tub and extends outside of the washing tub coaxial to a reference axis parallel to the longitudinal axis of the motor.
  • the two frustoconical-shaped coupling pins are used for centring the motor assembly on the fixing portion of the washing tub, whereas the two cylindrical-shaped coupling pins bears almost the whole weight of the motor assembly and support the mechanical stresses during operation of the electric motor.
  • WO 2006/083083 A2 and WO 2006/075903 A2 disclose a washing group comprising a washing tub in which in the rear side the electric motor is assembled, in co-axial position with a shaft connected to the drum rotatably mounted into the washing tub; the connection between the motor and the tub comprises positioning pins suitable to place the motor coupling portion in the correct mounting position on the tub, whereas the final assembly is provided by screws connecting the motor to the washing tub.
  • Aim of the present invention is therefore to realize a much more rigid mechanical coupling between electric motor and washing tub, which is moreover capable of speeding up the assembly of the electric motor onto the bottom portion of washing tub.
  • a washing group for laundry washing machines comprising a hollow washing tub, a revolving drum fitted in axially rotatable manner inside the washing tub, and a motor assembly including a drive motor which is rigidly attached outside the washing tub and is capable of driving into rotation the revolving drum inside the washing tub; the motor assembly also including at least one connecting part having an end portion fitted onto a corresponding coupling pin extending from the washing tub or vice versa, and at least one fixing screw engaging in sequence the end portion of the connecting part and the corresponding coupling pin; wherein each coupling pin has a frustoconical-shaped distal portion and an adjacent, cylindrical-shaped mid portion adjoining said frustoconical-shaped distal portion; wherein the end portion of the connecting part has a hollow seat which is substantially complementary in shape to that of the corresponding coupling pin so as to be axially engaged by said coupling pin, wherein the axial length of said frustoconical-shaped distal portion
  • the washing group is furthermore characterized in that said cylindrical-shaped mid portion adjoins the frustoconical-shaped distal portion to a proximal end of the coupling pin which is rigidly connected to the washing tub or to the drive motor; the proximal end of said coupling pin having, adjacent to said cylindrical-shaped mid portion and opposite to the frustoconical-shaped distal portion, a stop surface wherein the distal end of the connecting part stably abuts.
  • the washing group is furthermore characterized in that the proximal end of said coupling pin is provided with a substantially annular-shaped stop shoulder which adjoins the cylindrical portion, and wherein the distal end of connecting part stably abuts.
  • the washing group is furthermore characterized in that the axial length of said cylindrical-shaped mid portion is moreover approximately equal to half the axial length of said frustoconical-shaped distal portion.
  • the washing group is furthermore characterized in that the opening angle of said frustoconical-shaped distal portion ranges between 20° and 60°.
  • the washing group is furthermore characterized in that the outer diameter of said cylindrical-shaped mid portion ranges between 8 and 40 millimeters.
  • the washing group is furthermore characterized in that the motor assembly includes a number of connecting parts each having an end portion fitted onto a corresponding coupling pin extending from the washing tub or vice versa, and in that said coupling pins are parallel to a common fitting direction.
  • the washing group is furthermore characterized in that the motor assembly includes a number of connecting parts each having an end portion fitted onto a corresponding coupling pin extending from the washing tub or vice versa, and in that all coupling pins are identical in shape to one another and are preferably four in number.
  • the washing group is furthermore characterized in that said revolving drum extends coaxial to a longitudinal axis of the washing tub, and in that said fitting direction is substantially parallel the longitudinal axis of said washing tub.
  • the washing group is furthermore characterized in that said fixing screw extends coaxial to said coupling pin.
  • the washing group is furthermore characterized in that the motor assembly includes a number of connecting parts each having an end portion fitted onto a corresponding coupling pin extending from the washing tub or vice versa, and in that said motor assembly comprises a fixing screw for each coupling pin.
  • the washing group is furthermore characterized in that the motor assembly additionally comprises a supporting structure which is provided with a number of connecting arms each of which juts out from the drive motor towards the peripheral wall of washing tub; the distal end of each connecting arm forming a respective end portion of the connecting part.
  • the washing group is furthermore characterized in that said revolving drum extends coaxial to a longitudinal axis of the washing tub, and in that supporting structure is designed to arrange said drive motor with the longitudinal axis of the motor substantially parallel to the longitudinal axis of said washing tub.
  • the washing group is furthermore characterized in that the drive motor is an electric motor, and in that said supporting structure comprises at least one substantially cup-shaped, end-shield which is rigidly secured to an end-portion of said electric motor, and is provided with a number of outwards-protruding, connecting arms which extend toward the coupling pins on the washing tub.
  • the drive motor is an electric motor
  • said supporting structure comprises at least one substantially cup-shaped, end-shield which is rigidly secured to an end-portion of said electric motor, and is provided with a number of outwards-protruding, connecting arms which extend toward the coupling pins on the washing tub.
  • reference number 1 indicates as a whole a washing group suitably structured/designed for being incorporated into a laundry washing machine.
  • a home laundry washing machine 100 basically comprises: a preferably, though not necessarily, substantially parallelepiped-shaped, outer boxlike casing 101 structured for resting on the floor; and a washing group 1 which is accommodated, preferably substantially horizontally, inside the casing 101.
  • the washing group 1 is preferably suspended in floating manner inside the casing 101 via a suspension system which preferably, though not necessarily, comprises at least one and preferably a couple of upper coil springs 102 connecting the upper portion of washing group 1 to the top portion of boxlike casing 101, and preferably at least one, and preferably a couple of vibration dampers 103 connecting the bottom portion of washing group 1 to the bottom portion of boxlike casing 101.
  • a suspension system which preferably, though not necessarily, comprises at least one and preferably a couple of upper coil springs 102 connecting the upper portion of washing group 1 to the top portion of boxlike casing 101, and preferably at least one, and preferably a couple of vibration dampers 103 connecting the bottom portion of washing group 1 to the bottom portion of boxlike casing 101.
  • the washing group 1 in turn comprises: a preferably substantially cylindrical, hollow washing tub 2 which is structured for being arranged, preferably substantially horizontally, inside the casing 101, and is provided with a laundry loading and unloading mouth (not visible in the figures) which is dimensioned for allowing an easy loading and unloading of the laundry inside the washing tub 2; a substantially cylindrical, hollow revolving drum 3 which is fitted in axially rotatable manner inside the washing tub 2 and is structured for accommodating the laundry to be washed; and a motor assembly 4 which is rigidly attached outside and preferably underneath the washing tub 2, and is mechanically connected to the revolving drum 3 thus to be able to drive into rotation the same revolving drum 3 inside the washing tub 2.
  • the revolving drum 3 extends inside the washing tub 2 coaxial to a reference axis A preferably locally substantially coinciding with the preferably horizontally-oriented, longitudinal reference axis of washing tub 2, and is rigidly fixed to the inner axial end of a central supporting shaft 5 which extends coaxial to axis A and is fitted in pass-through and axially rotatable manner into the rear wall 6 of washing tub 2 so as to stick out from the back of washing tub 2.
  • the washing group 1 preferably furthermore comprises a first pulley 7 which is arranged outside of washing tub 2 coaxial to the longitudinal axis A of revolving drum 3 and supporting shaft 5, and is rigidly fitted to the outer axial end of supporting shaft 5, so as to be able to rotate about axis A together with revolving drum 3 and supporting shaft 5.
  • a first pulley 7 which is arranged outside of washing tub 2 coaxial to the longitudinal axis A of revolving drum 3 and supporting shaft 5, and is rigidly fitted to the outer axial end of supporting shaft 5, so as to be able to rotate about axis A together with revolving drum 3 and supporting shaft 5.
  • the washing group 1 is preferably structured for being incorporated into a front-loading laundry washing machine 100, therefore the preferably circular-shaped, laundry loading and unloading mouth (not visible in the figures) of washing tub 2 is preferably located roughly at centre of the front wall of washing tub 2, i.e. the wall opposite to rear wall 6, so as to directly face a large pass-through opening which is formed in the front wall of boxlike casing 101 and is dimensioned for allowing an easy manual loading and unloading of the laundry inside the washing tub 2.
  • the revolving drum 3 is preferably substantially cup-shaped and is fitted in axially rotatable manner inside the washing tub 2 with the concavity facing the laundry loading and unloading mouth of washing tub 2, so as to receive the laundry to be washed.
  • the motor assembly 4 in turn comprises: a drive motor 8 which is capable of driving into rotation the supporting shaft 5 of revolving drum 3 about longitudinal axis A, and is arranged beneath the washing tub 2, adjacent to a fixing arrangement formed on the substantially cylindrical-shaped, peripheral wall 9 of washing tub 2, with the motor longitudinal axis B locally substantially parallel to the longitudinal axis A of supporting shaft 5 and revolving drum 3; and preferably an intermediate supporting structure 10 which rigidly connects the drive motor 8 to the peripheral wall 9 of washing tub 2.
  • a drive motor 8 which is capable of driving into rotation the supporting shaft 5 of revolving drum 3 about longitudinal axis A, and is arranged beneath the washing tub 2, adjacent to a fixing arrangement formed on the substantially cylindrical-shaped, peripheral wall 9 of washing tub 2, with the motor longitudinal axis B locally substantially parallel to the longitudinal axis A of supporting shaft 5 and revolving drum 3; and preferably an intermediate supporting structure 10 which rigidly connects the drive motor 8 to the peripheral wall 9 of washing tub 2.
  • the supporting structure 10 is firmly secured to the drive motor 8 and is structured/designed to be rigidly fitted and fastened to the fixing arrangement on peripheral wall 9, preferably in easy detachable manner, so as to arrange, when firmly secured to washing tub 2, the longitudinal axis B of drive motor 8 substantially parallel to the longitudinal axis A of supporting shaft 5 and revolving drum 3.
  • the motor assembly 4 preferably comprises a second pulley 11 which is arranged coaxial to longitudinal axis B, and is rigidly fitted to the distal end of the driving shaft 12 of drive motor 8; and the supporting structure 10 is preferably designed for arranging, when firmly secured to the washing tub 2, the pulley 11 substantially coplanar to pulley 7.
  • the washing group 1 furthermore comprises a driving belt 13 which is looped over pulleys 7 and 11 thus to allow the drive motor 8 to selectively drive into rotation both supporting shaft 5 and revolving drum 3 about longitudinal axis A.
  • a driving belt 13 which is looped over pulleys 7 and 11 thus to allow the drive motor 8 to selectively drive into rotation both supporting shaft 5 and revolving drum 3 about longitudinal axis A.
  • the fixing arrangement of washing tub 2 basically comprises a number of locally reciprocally-parallel and substantially ogival-shaped, coupling pins 14 which are rigidly fixed to the peripheral wall 9 of washing tub 2, and extend cantilevered outside of washing tub 2 while remaining locally parallel to a same fitting direction f which is preferably locally substantially parallel to the longitudinal axis A of supporting shaft 5 and of revolving drum 3, i.e. to the longitudinal axis of washing tub 2.
  • each coupling pin 14 is located outside of washing tub 2, has the proximal end stably connected to the peripheral wall 9 of washing tub 2, and finally extend cantilevered from washing tub 2 coaxial to a longitudinal reference axis C which is locally parallel to the fitting direction f and preferably also to the longitudinal axis A of supporting shaft 5 and revolving drum 3.
  • the coupling pins 14 are moreover identical in shape to one another.
  • each coupling pin 14 of washing tub 2 preferably cantilevered sticks out from a supporting appendage which protrudes from peripheral wall 9 and is preferably realized in one piece with peripheral wall 9 of washing tub 2.
  • each coupling pin 14 of washing tub 2 furthermore has a frustoconical-shaped distal portion 14a extending coaxial to longitudinal axis C, and an adjacent cylindrical-shaped mid portion 14b extending coaxial to longitudinal axis C. Said cylindrical-shaped mid portion 14b adjoins the frustoconical-shaped distal portion 14a to the proximal end of coupling pin 14.
  • the proximal end of coupling pin 14 moreover has, immediately adjacent to the cylindrical-shaped mid portion 14b and opposite to distal portion 14a, a stop surface 14c wherein the distal end of connecting arm 15 stably abuts.
  • the proximal end of coupling pin 14 is preferably provided with a substantially annular-shaped, stop shoulder 14c which adjoins the cylindrical-shaped mid portion 14b, and wherein the distal end of connecting arm 15 stably abuts.
  • the axial length l a of frustoconical-shaped portion 14a is greater than the axial length l b of cylindrical-shaped portion 14b.
  • the axial length l b of cylindrical-shaped portion 14b is moreover approximately equal to, or even greater than, half the axial length l a of the frustoconical-shaped portion 14a.
  • the axial length l a of frustoconical-shaped portion 14a preferably ranges between 5 mm and 25 mm (millimeters)
  • the axial length l b of cylindrical-shaped portion 14b preferably ranges between 5 mm and 15 mm (millimeters).
  • the opening angle ⁇ of the frustoconical-shaped portion 14a furthermore ranges between 20° and 60°.
  • the outer diameter of cylindrical-shaped portion 14b furthermore ranges between 8 mm and 40 mm (millimeters).
  • the supporting structure 10 in turn comprises a number of connecting arms 15 each of which juts out from drive motor 8 and extends towards the fixing arrangement on peripheral wall 9, so as to reach and rigidly couple to a corresponding coupling pin 14 of washing tub 2.
  • each connecting arm 15 is provided with a substantially ogival-shaped, hollow seat 16 which is substantially complementary in shape to that of the coupling pins 14 so as to accommodate a coupling pin 14, and extends coaxial to a longitudinal reference axis D which is locally substantially parallel to the fitting direction f and preferably also to the longitudinal axis B of drive motor 8, so as to be axially engaged by said coupling pin 14.
  • each connecting arm 15 is designed to have a frustoconical-shaped bottom portion 16a which extends coaxial to longitudinal axis D and is substantially complementary-shaped to the distal portion 14a of coupling pin 14; and an adjacent cylindrical portion 16b which extends coaxial to axis D for adjoining the frustoconical-shaped bottom portion 16a to the mouth of hollow seat 16, and is substantially complementary-shaped to the mid portion 14b of coupling pin 14, so that the distal end of connecting arm 15 can stably abut onto the stop shoulder 14c of coupling pin 14 when the coupling pin 14 is completely fitted into the ogival-shaped hollow seat 16.
  • the coupling pin 14 is coaxial to the longitudinal axis D of same hollow seat 16.
  • the connecting arms 15 are preferably located at both axial ends of drive motor 8, and furthermore extend towards the fixing arrangement on peripheral wall 9 preferably while remaining locally substantially perpendicular to the peripheral wall 9 and/or to the fitting direction f, and preferably also while remaining substantially perpendicular to longitudinal axis B of drive motor 8.
  • the motor assembly 4 includes at least one connecting part 15 which has an end portion 16 fitted onto a corresponding substantially ogival-shaped, coupling pin 14 extending from the washing tub 2.
  • the motor assembly 4 additionally comprises, preferably for each coupling pin 14 of washing tub 2, a fixing screw 17 which engages in sequence the distal end of connecting arm 15 and the corresponding coupling pin 14, thus to firmly hold the distal end of connecting arm 15 in stable abutment against the stop shoulder 14c at the proximal end of coupling pin 14.
  • fixing screw 17 preferably extends coaxial to the longitudinal axis C of coupling pin 14 so as to place the head 17a of fixing screw 17 in abutment on the distal end of connecting arm 15, opposite to the ogival-shaped hollow seat 16.
  • the threaded shank 17b of fixing screw 17 in turn, firstly engages the distal end of connecting arm 15 thus to protrude into the ogival-shaped hollow seat 16 formed on said distal end, and then engages the coupling pin 14 preferably in pass-through manner, so as to firmly secure the two components in abutment to one another.
  • each coupling pin 14 is preferably provided with a through hole 18 extending coaxial to longitudinal axis C, and the tip portion of threaded shank 17b is screwed into said through hole 18.
  • the distal end of connecting arm 15, in turn, is preferably provided, opposite to the mouth of hollow seat 16, with a through hole 19 that adjoins to the bottom of hollow seat 16, and the neck of fixing screw 17 engages said through hole 19.
  • the coupling pin 14 could centrally incorporate a stiffening insert and the threaded shank 17b of fixing screw 17 screws into said stiffening insert, or the threaded shank 17b of fixing screw 17 could extend along the through hole 18 for the whole length of coupling pin 14 and screw into a lock nut arranged beyond the proximal end of the coupling pin 14.
  • the fixing arrangement on the peripheral wall 9 of washing tub 2 preferably comprises four reciprocally-parallel coupling pins 14, and preferably a fixing screw 17 for each coupling pin 14.
  • coupling pins 14 are furthermore arranged in pairs parallel and spaced beside to one another.
  • the pairs of coupling pins 14 are moreover aligned to one another parallel to fitting direction f, so to form two adjacent and reciprocally-parallel rows of coupling pins 14 on peripheral wall 9 of washing tub 2.
  • the drive motor 8 is preferably an electric motor, such as for example a asynchronous motor or a commutator electric motor.
  • the supporting structure 10 in turn, preferably comprises a pair of preferably substantially cup-shaped, end-shields 20 and 21 which are arranged on opposite sides of drive motor 8, roughly coaxial to the longitudinal axis B, and are rigidly secured respectively to the front and rear portions of electric motor 8 preferably via a number of fixing bolts or other fastening members.
  • the front end-shield 20 i.e. the end-shield engaged in pass-through and axially rotatable manner by the driving shaft 12 of drive motor 8, is preferably provided with two substantially coplanar and outwards-protruding, connecting arms 15 which extend toward a first pair of coupling pins 14 of washing tub 2.
  • Each connecting arm 15 of end-shield 20 furthermore has a substantially cup-shaped, distal end which is designed to fit onto a respective coupling pin 14 of said first pair of coupling pins 14.
  • the central cavity of the cup-shaped, distal end of connecting arm 15 forms the substantially ogival-shaped, hollow seat 16 which is axially engaged by the coupling pin 14.
  • the rear end-shield 21 is provided with two substantially coplanar outwards-protruding, connecting arms 15 which extend toward a second pair of coupling pins 14 of washing tub 2.
  • Each connecting arm 15 of end-shield 21 furthermore has a substantially cup-shaped, distal end which is designed to fit onto a respective coupling pin 14 of said second pair of coupling pins 14.
  • the washing group 1 finally comprises also an electric heating device 22, for example a resistor, which is fixed to washing tub 2 so as to at least partially protrude inside washing tub 2, and is capable of selectively heating up the water contained into the washing tub 2.
  • an electric heating device 22 for example a resistor, which is fixed to washing tub 2 so as to at least partially protrude inside washing tub 2, and is capable of selectively heating up the water contained into the washing tub 2.
  • the laundry washing machine 100 moreover comprises: an electrically-operated, water and detergent supply assembly 104 which is preferably located immediately above the washing group 1, and is structured for selectively feeding into the washing tub 2 a given amount of detergent, softener and/or other washing agent suitably mixed with the fresh water arriving from the water mains, or simply a given amount of fresh water arriving from the water mains; and an electronic central control unit (not shown) which controls the electric motor 8, the heating device 22 and the water and detergent supply assembly 104 to selectively perform one of the user-selectable washing cycles stored in the same central control unit.
  • an electrically-operated, water and detergent supply assembly 104 which is preferably located immediately above the washing group 1, and is structured for selectively feeding into the washing tub 2 a given amount of detergent, softener and/or other washing agent suitably mixed with the fresh water arriving from the water mains, or simply a given amount of fresh water arriving from the water mains
  • an electronic central control unit (not shown) which controls the electric motor 8, the heating device 22 and the water and detergent
  • washing group 1 General operation of washing group 1 is clearly inferable from the above description, with no further explanation required.
  • each coupling pin 14 can operate as a centring member during assembly of supporting structure 10 on washing tub 2, and at same time can directly bear the weight of motor assembly 4 even when fixing screws 17 are missing. Therefore the assembly of supporting structure 10 to washing tub 2 is significantly quicker.
  • cylindrical-shaped mid portions 14b offers a much more stable support for motor assembly 4 during working of drive motor 8.
  • each coupling pins 14 has a cylindrical-shaped mid portion 14b, the overall contact surface capable of bearing the mechanical stresses during working of drive motor 8 is significantly increased with respect to the fixing system disclosed in EP2775024A1 , with all advantages that this entails.
  • the coupling pins 14 may be located on the distal end of the connecting arms 15 whereas the hollow seats 16 may be integrally formed on the peripheral wall 9 of washing tub 2.
  • the motor assembly 4 may include one or more ogival-shaped, coupling pin 14 extending from the drive motor 8 and fitted into corresponding connecting part/s 15 formed on washing tub 2.
  • the supporting structure 10 may solely comprise the front end-shield 20 with the corresponding connecting arms 15.
  • the supporting structure 10 may comprise a number of connecting arms 15 which juts out solely from the front portion of electric motor 8 towards a number of corresponding coupling pins 14 located on the peripheral wall 9 of washing tub 2.

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

Claims (13)

  1. Groupe de lavage (1) pour machines à laver le linge comprenant une cuve de lavage creuse (2), un tambour rotatif (3) monté de manière rotative axialement à l'intérieur de la cuve de lavage (2), et un ensemble moteur (4) incluant un moteur d'entraînement (8) qui est attaché de manière rigide à l'extérieur de la cuve de lavage (2) et est capable d'entraîner en rotation le tambour rotatif (3) à l'intérieur de la cuve de lavage (2) ;
    l'ensemble moteur (4) incluant également au moins une partie de connexion (15) ayant une portion d'extrémité (16) montée sur une broche de couplage correspondante (14) qui s'étend à partir de la cuve de lavage (2) ou vice versa, et au moins une vis de fixation (17) qui entre en prise séquentiellement avec la portion d'extrémité (16) de la partie de connexion (15) et la broche de couplage correspondante (14) ; dans lequel chaque broche de couplage (14) a une portion distale de forme tronconique (14a) et une portion médiane adjacente de forme cylindrique (14b) attenante à ladite portion distale de forme tronconique (14a) ; et dans lequel
    la portion d'extrémité (16) de la partie de connexion (15) a un siège creux (16) qui est essentiellement complémentaire en forme de celle de la broche de couplage correspondante (14) de manière à être mis en prise axialement par ladite broche de couplage (14), caractérisé en ce que la longueur axiale (ℓa) de ladite portion distale de forme tronconique (14a) est supérieure à la longueur axiale (ℓb) de ladite portion médiane de forme cylindrique (14b).
  2. Groupe de lavage selon la revendication 1, caractérisé en ce que ladite portion médiane de forme cylindrique (14b) connecte la portion distale de forme tronconique (14a) à une extrémité proximale de la broche de couplage (14) qui est connectée de manière rigide à la cuve de lavage (2) ou au moteur d'entraînement (8) ; l'extrémité proximale de ladite broche de couplage (14) ayant, adjacente à ladite portion médiane de forme cylindrique (14b) et opposée à la portion distale de forme tronconique (14a), une surface d'arrêt (14c), où l'extrémité distale de la partie de connexion (15) bute de manière stable.
  3. Groupe de lavage selon la revendication 2, caractérisé en ce que l'extrémité proximale de ladite broche de couplage (14) est munie d'un épaulement d'arrêt (14c) essentiellement de forme annulaire, qui est attenant à la portion cylindrique (14b), et où l'extrémité distale de la partie de connexion (15) bute de manière stable.
  4. Groupe de lavage selon la revendication 3, caractérisé en ce que la longueur axiale (ℓb) de ladite portion médiane de forme cylindrique (14b) est en outre approximativement égale à la moitié de la longueur axiale (ℓa) de ladite portion distale de forme tronconique (14a).
  5. Groupe de lavage selon l'une quelconque des revendications précédentes, caractérisé en ce que l'angle d'ouverture (α) de ladite portion distale de forme tronconique (14a) est compris entre 20° et 60°.
  6. Groupe de lavage selon l'une quelconque des revendications précédentes, caractérisé en ce que le diamètre extérieur de ladite portion médiane de forme cylindrique (14b) est compris entre 8 et 40 millimètres.
  7. Groupe de lavage selon l'une quelconque des revendications précédentes, caractérisé en ce que l'ensemble moteur (4) inclut un nombre de parties de connexion (15) ayant chacune une portion d'extrémité (16) montée sur une broche de couplage correspondante (14) qui s'étend à partir de la cuve de lavage (2) ou vice versa, et en ce que lesdites broches de couplage (14) sont parallèles à une direction de montage commune (f) .
  8. Groupe de lavage selon l'une quelconque des revendications précédentes, caractérisé en ce que l'ensemble moteur (4) inclut un nombre de parties de connexion (15) ayant chacune une portion d'extrémité (16) montée sur une broche de couplage correspondante (14) qui s'étend à partir de la cuve de lavage (2) ou vice versa, et en ce que toutes les broches de couplage (14) sont identiques en forme les unes aux autres et sont de préférence au nombre de quatre.
  9. Groupe de lavage selon la revendication 7 ou 8, caractérisé en ce que ledit tambour rotatif (3) s'étend coaxialement à un axe longitudinal (A) de la cuve de lavage (2), et en ce que ladite direction de montage (f) est essentiellement parallèle à l'axe longitudinal (A) de ladite cuve de lavage (2).
  10. Groupe de lavage selon la revendication 1, caractérisé en ce que ladite vis de fixation (17) s'étend coaxialement à ladite broche de couplage (14).
  11. Groupe de lavage selon l'une quelconque des revendications précédentes, caractérisé en ce que l'ensemble moteur (4) inclut un nombre de parties de connexion (15) ayant chacune une portion d'extrémité (16) montée sur une broche de couplage correspondante (14) qui s'étend à partir de la cuve de lavage (2) ou vice versa, et en ce que ledit ensemble moteur (4) comprend une vis de fixation (17) pour chaque broche de couplage (14).
  12. Groupe de lavage selon l'une quelconque des revendications précédentes, caractérisé en ce que l'ensemble moteur (4) comprend en outre une structure support (10) qui est munie d'un nombre de bras de connexion qui dépassent chacun à partir du moteur d'entraînement (8) vers une paroi périphérique (9) de la cuve de lavage (2) ; l'extrémité distale de chaque bras de connexion formant une portion d'extrémité respective (16) de la partie de connexion (15).
  13. Machine à laver le linge (100) ayant un boîtier extérieur (101) structuré pour reposer sur le sol, et un groupe de lavage (1) qui est agencé à l'intérieur du boîtier (101) et comprend une cuve de lavage creuse (2), un tambour rotatif (3) monté de manière rotative axialement à l'intérieur de la cuve de lavage (2), et un ensemble moteur (4) qui est attaché de manière rigide à l'extérieur de la cuve de lavage (2) et est capable d'entraîner en rotation le tambour rotatif (3) à l'intérieur de la cuve de lavage (2) ;
    la machine à laver le linge (100) étant caractérisée en ce que ledit groupe de lavage (1) est un groupe de lavage (1) selon l'une quelconque des revendications 1 à 12.
EP15193109.4A 2015-11-05 2015-11-05 Groupe de lavage pour machines à laver le linge Active EP3165664B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15193109.4A EP3165664B1 (fr) 2015-11-05 2015-11-05 Groupe de lavage pour machines à laver le linge
US15/341,618 US20170137984A1 (en) 2015-11-05 2016-11-02 Washing Group for Laundry Washing Machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15193109.4A EP3165664B1 (fr) 2015-11-05 2015-11-05 Groupe de lavage pour machines à laver le linge

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EP3165664A1 EP3165664A1 (fr) 2017-05-10
EP3165664B1 true EP3165664B1 (fr) 2020-07-22

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Publication number Priority date Publication date Assignee Title
EP4379117A1 (fr) 2022-11-29 2024-06-05 Askoll Holding S.r.l. a socio unico Support pour fixer un moteur électrique à une cuve d'un appareil électroménager, en particulier une machine à laver

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ES2154536B1 (es) * 1998-02-19 2001-11-01 Balay Sa Sistema de sujecion del motor a la cuba de lavadoras.
AU753411B2 (en) * 1999-10-19 2002-10-17 Lg Electronics Inc. Structure of driving unit in drum type washing machine
DE10062364A1 (de) * 2000-12-14 2002-06-20 Bsh Bosch Siemens Hausgeraete Antriebsvorrichtung für ein Haushaltsgerät und Verfahren zur Montage eines Elektromotors
KR100774166B1 (ko) * 2001-12-18 2007-11-07 엘지전자 주식회사 모터의 선택적 장착이 가능한 모터브라켓 일체형 터브를구비한드럼세탁기
US7557486B2 (en) * 2005-01-17 2009-07-07 Lg Electronics Inc. Dual rotor type motor
KR100651849B1 (ko) * 2005-02-01 2006-12-01 엘지전자 주식회사 세탁기
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DE102005060362A1 (de) * 2005-12-16 2007-06-21 BSH Bosch und Siemens Hausgeräte GmbH Befestigungsvorrichtung für einen Motor in einem Haushaltgerät
DE102006027440B3 (de) * 2006-06-12 2007-05-31 Miele & Cie. Kg Vorrichtung zum Befestigen eines Motors an einem Laugenbehälter einer Waschmaschine
KR101407962B1 (ko) * 2007-05-22 2014-06-17 삼성전자 주식회사 세탁기 및 그 터브
ITPN20130015U1 (it) 2013-03-07 2014-09-08 Nidec Sole Motor Corp S R L Apparato per il fissaggio di un motore alla vasca di una macchina lavatrice
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