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    • 专利摘要:
    Radial oscillation damping device of an oscillating group of a washing machine, articulation device and washing machine comprising the damping device. Radial oscillation damping device of an oscillating group of a washing machine, comprising a lever arm (1) with a coupling body (1a) with an internal passage (1b) rotatably insertable on a support shaft (2a) fixed to a part of a washing machine (3), and a friction damping element (4) of elastically flexible material, which is inserted in the inner passage (1b) so that, when the coupling body (1a) it is inserted on the support shaft (2a), it opposes a frictional resistance to the rotation of the lever arm (1) on the support shaft (2a), which comprises retaining elements (5, 6, 7, 8, 9, 10) provided in the friction damping element (4) and in the coupling body (1a) of the lever arm (1), which are associated with each other in a form-fitting manner for retaining the friction damping element (4). ) axially in the inner passage (1b) of the coupling body (1a). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2547364A1
    申请号:ES201430501
    申请日:2014-04-04
    公开日:2015-10-05
    发明作者:Ismael Gracia Bobed；Eduardo GRACIA CANO；Gerardo Martínez Pérez；Eduardo Recio Ferrer
    申请人:BSH Electrodomesticos Espana SA；
    IPC主号:
    专利说明:

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    DESCRIPTION RADIUS AMORTIGUATION DEVICE OF OSCILLATIONS OF AN OSCILLATING GROUP OF A WASHING MACHINE, ARTICULATION DEVICE AND WASHING MACHINE UNDERSTANDING THE AMORTIGUATION DEVICE
    TECHNICAL FIELD OF THE INVENTION
    The present invention falls within the technical field of washing machines and, particularly, in the radial damping systems of vibrations generated by oscillating groups of washing machines, such as washing machines and dryers.
    BACKGROUND OF THE INVENTION
    The washing machines comprise an oscillating group that generally comprise a washing tank, a rotating washing drum inside the tank, a motor that transmits rotational movement to the drum, a transmission that transmits the rotation movement of the motor to the drum. , and counterweights that define the dynamic behavior of the oscillating group. The oscillating group is usually suspended in the upper part of the frame of the washing machine by means of clamping springs, and is supported by one
    or more, frequently in three, oscillation dampers fixed at the bottom of the frame.
    The rotation of the washing drum generates, especially when accelerating or decelerating, oscillations which in turn cause noise when transmitted to the washing machine. In order to avoid the direct transmission of these oscillations to the frame and to the carcass of the washed machine, it is known to employ systems comprising radial dampers such as those described, for example, in the application WO2011 / 070092A1.
    Each radial damper usually comprises a support arm, such as a bar, superiorly articulated to the washing tank and inferiorly to a lever arm which in turn is articulated to a horizontal support bushing of a support fixed to a lower part of The housing of the washing machine. The bushing extends through an internal passage of the lever arm and, between the external surface of the support bushing and the internal surface of the internal passage, a radial damping element, such as a friction sponge, a friction strip or a friction bushing, whose function is to offer a certain frictional resistance to the rotation of the lever arm with respect to the support.
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    In radial dampers, the axial displacement of the friction damping element in the horizontal bushing is delimited between two stops, such as two opposite lugs of the support between which the support bushing extends and / or two retaining rings of rubber. However, this delimitation of the axial displacement does not prevent the friction damping element from being able to move between the two stops, which implies that the vibrations of the oscillating group transmitted to the lever arm can move the damping element by friction towards one or the other of the stops, which may imply a reduction in the damping, greater wear of the compression friction damping element and / or twist of the friction damping element when pressed against one of the stops when the lever arm tilts laterally with respect to of support n one way or another.
    In radial dampers, the damping capacity of the friction damping element also depends on the firmness with which the friction damping element is retained between the support bushing and the inner passage of the lever arm. This firmness can be lost with use, which leads to losses in the damping function.
    DESCRIPTION OF THE INVENTION
    The object of the present invention is to overcome the drawbacks of the state of the art detailed above, by means of a radial damping device of oscillations of an oscillating group of a washing machine, as well as by an articulation device and a washing machine comprising the damping device. The radial oscillation damping device of an oscillating group of a washing machine according to the invention comprises a lever arm with a coupling body with an internally rotatable insert passage on a support shaft, in particular a support bushing, attachable to a part of a washing machine, and a friction damping element, which is inserted in the inner passage so that, when the coupling body is inserted on the support shaft, it opposes a frictional resistance to the rotation of the lever arm on the support shaft. This damping device comprises axial retaining elements provided in the friction damping element and in the coupling body of the lever arm, which are associated with each other by drag-on fixing so as to retain the axially damping element by friction in the internal passage of the coupling body. Preferably the friction damping element is made of elastically flexible material, for example foam or foamed plastic, especially polyurethane.
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    By "associated with each other by fixing in form drag", it is understood to be associated with each other in form connection, especially fixed by form drag or fixedly connected by form drag.
    Preferably, the inner passage is surrounded by an inner wall of the coupling body is cylindrical in shape and is delimited between respective open ends, while the friction damping element is a tubular element with two free ends, an internal axial passage extending between respective open bases each surrounded by one of the free ends, and an outer wall connected at least partially to the inner wall of the coupling body. The outer wall of the friction damping element comprises an internal sliding friction surface on a peripheral surface of the shaft. In particular, the internal friction surface being intended to be pinched against the peripheral surface of the shaft.
    The internal surface of the friction damping element is conveniently polished for the purpose of removing and / or filling porosities therein, for example by polishing with a lubricant such as grease. This results in greater friction uniformity of the internal surface on the external surface of the support axis. At least a part of the internal surface of the friction damping element may be provided with annular grooves, which allows the lubricant to be retained in the grooves.
    In a first embodiment of the damping device according to the invention, the retaining elements comprise a plurality of arcuate recesses at each of the free ends of the friction damping element, so that each free end comprises battlements arranged between each inlet, and arched projections that emerge from the inner wall in both extreme areas of the inner passage of the coupling body to the interior of the inner passage.
    Each recess of each free end of the friction damping element comprises a peripheral part that meets one of the emerging projections of the inner wall of the coupling body so that the friction damping element is axially retained by its recesses between said projections .
    In turn, each battlement of a free end of the friction damping element protrudes between each of the projections of the open ends of the inner wall of the coupling body, so that the friction damping element is rotatably retained by its battlements. outstanding between said projections.
    Each projection of the coupling body may be narrower than the recess of the friction damping element on which it is arranged, so that the friction damping element and the coupling body can freely rotate each other along an arc . The arc along which they can rotate freely is preferably smaller
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    than 5th, more preferably greater than 1st. More preferably they can rotate each other along an arc between 1º and 4º. With this characteristic, it is achieved that before the shortest and most frequent oscillations of the oscillating group of the washing machine, which are basically produced with the machine stabilized at a constant speed of the washing drum, there is a free turning path in which the friction damping does not rotate on the shaft and therefore does not transmit vibrations to the carcass of the washing machine.
    Preferably, the recesses of the friction damping element are distributed equally at each of the free ends of the friction damping element, while the projections of the coupling body are equally distributed on the inner wall of the coupling body.
    Preferably the recesses can be arranged facing the battlements of the friction damping element.
    The recesses of one of the free ends may be arranged three-way with respect to the recesses of the other of the free ends of the friction damping element, in which case the protrusions of the emerging coupling body in one of the end zones of the inner passage are arranged three-way with respect to the emerging projections in the other of the extreme areas of the inner passage of the inner passage of the coupling body.
    Preferably and according to this first embodiment, the damping device comprises an odd number of recesses in each of the free ends of the friction damping element, and an odd number of projections in each of the end zones of the inner passage of the inner passage of the coupling body.
    In a second embodiment of the damping device according to the invention, the friction damping element comprises a plurality of axial recesses entering the outer wall of the friction damping element, in which respective axial emerging ribs of the inner wall are arranged which surrounds the internal passage of the coupling body, so that the friction damping element is axially and rotationally retained by axial recesses and axial ribs. Axial recesses and axial ribs may be equidistant radially distributed from the friction damping element and the coupling body, ie angularly equidistant.
    Each axial recess may be transversely wider than the axial rib that is disposed therein, so that the friction damping element and the coupling body can freely rotate with each other along an arc. The arc along which they can rotate freely is preferably less than 5 °, more preferably greater than 1 °. More preferably they can rotate each other along an arc between 1º and 4º. With this
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    characteristic is also achieved that before the shortest and most frequent oscillations of the oscillating group of the washing machine, which are basically produced with the machine stabilized at constant speed of the washing drum, there is a free turning path in which the damping element by friction it does not rotate on the shaft and, therefore, does not transmit vibrations to the washing machine housing.
    In a third embodiment of the damping device according to the invention, compatible, for example with the second embodiment described above, the free ends of the friction damping element are enlarged to form two extensions.
    or perimeter wings that externally embrace respective edges that surround the open bases of the inner passage of the coupling body, so that the friction damping element is axially retained by the perimeter wings. In this way, the widened free ends of the friction damping element and the edges surrounding the open bases of the inner passage of the coupling body form axial retention elements.
    According to this third embodiment of the damping device, an emerging central band of the inner surface of the outer wall of the friction damping element may be provided, which, in the resting state of the radial damping device, contacts the peripheral surface From the axis. This central band is located between two lowered end portions of the inner surface that are only pressed against the peripheral surface of the shaft from a certain lateral tilt of the lever arm relative to the support in one direction or another.
    The friction damping element may comprise incoming annular grooves in respective intermediate zones of two halves of the inner surface of the outer wall. In this case, each annular groove is sized so that, when the lever arm tilts laterally with respect to the support and the coupling body presses the diagonally opposite free ends of the intermediate zones against the peripheral surface of the shaft, the outer wall of the element friction damping flexes between the pressed free ends and the corresponding annular groove (4f).
    It follows that the characteristics of the radial damping device overcome the drawbacks of the radial damping devices of the prior art, in addition to resulting in an easily manufactured device, of simple and economical structure.
    The articulation device according to the invention comprises a support attachable to a part of a washing machine, and a damping device comprising a lever arm comprising a coupling body with an internal passage rotatably inserted on a support shaft and a friction damping element,
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    preferably of elastically flexible material, which is inserted in the inner passage so that, when the coupling body is inserted on the shaft, it opposes a frictional resistance to the rotation of the lever arm on the shaft, the damping device being the device of radial damping described above.
    This articulation device has the advantage of being able to be manufactured as a set, and then assembled as an assembly assembly of the washing machine.
    Finally, the washing machine according to the invention comprises a housing that houses an oscillating group comprising an oscillating group with a washing tank in which a washing drum driven by a motor rotates. The tank is connected to the housing superiorly by at least one pair of support springs and inferiorly through a radial damping system articulated to the housing.
    The radial damping system comprises a damping device which in turn comprises a support fixed to the carcass of the washing machine, a lever arm comprising a coupling body with an internal passage rotatably inserted on an axis of the support and a friction damping element, preferably of elastically flexible material, which is inserted in the inner passage.
    BRIEF DESCRIPTION OF THE FIGURES
    Aspects and embodiments of the invention are described below on the basis of schematic drawings, in which
    Figure 1 is a front perspective view of an embodiment of a washing machine on which supports according to the invention can be mounted;
    Figure 2 is a front elevational view sectioned along the line A-A- of the washing machine shown in Figure 1 comprising radial damping devices according to the invention;
    Figure 3 is a bottom-side perspective view of a first embodiment of a lever arm according to the invention;
    Figure 4 is a side elevation view of the lever arm shown in Figure 3;
    Figure 5 is a sectional view on line B-B of the lever arm shown in Figure 4;
    Figure 6 is a sectional view along the line C-C of the lever arm shown in Figure 4;
    Figure 7 is a perspective view of a strip from which a first embodiment of a friction sponge can be obtained according to an embodiment compatible with the embodiment of the lever arm illustrated in Figures 1 to 6;
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    Figure 8 is a top plan view of the friction sponge obtained from the strip shown in Figure 7; Figure 9 is a side elevational view of the first free end of the friction sponge illustrated in Figure 8; Figure 10 is a side elevational view of the second free end of the friction sponge illustrated in Figure 8; Figure 11 is a bottom-side perspective view of a second embodiment of a lever arm according to the invention; Figure 12 is a side elevation view of the lever arm shown in Figure 11; Figure 13 is a sectional view along the line D-D of the lever arm shown in Figure 12; Figure 14 is a sectional view along the E-E line of the lever arm shown in Figure 12; Figure 15 is a perspective view of a strip from which a first embodiment of a friction sponge can be obtained according to an embodiment compatible with the embodiment of the lever arm illustrated in Figures 11 to 14; Figure 16 is a top plan view of the friction sponge obtained from the strip shown in Figure 15; Figure 17 is a side elevational view of a free end of the friction sponge 20 illustrated in Figure 16; Figure 18 is a longitudinal sectional view of a third embodiment of a lever arm and a friction sponge, mounted on a support, in the rest position; Figure 19 is a view of the third embodiment illustrated in Figure 18, in which the lever arm is tilted to the left with respect to the support; Figure 20 is a view of the third embodiment illustrated in Figure 18, in which the lever arm is tilted to the right with respect to the support; Figure 21 is a top plan view of an embodiment of a strip from which the friction sponge illustrated in Figure 18 can be obtained; Figure 22 is a side elevation view of the friction sponge illustrated in Figure 30 18; Figure 23 is a sectional view along the line F-F of the friction sponge illustrated in Figure 22; Figure 24 is a longitudinal sectional view of a fourth embodiment of the friction sponge according to the invention; Figure 25 is a top plan view of an embodiment of a strip from which the friction sponge illustrated in Figure 24 can be obtained;
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    Figure 26 is a side elevation view of the strip illustrated in Figure 25;
    Figure 27 is a longitudinal sectional view of a lever arm as illustrated in Figures 18 to 20, with the friction sponge illustrated in Figure 24, mounted on the support shown in Figure 18, with the lever arm tilted to the left with respect to the support;
    Figure 28 is a longitudinal sectional view of a fifth embodiment of a friction sponge according to the invention, mounted on a lever arm as illustrated in Figures 18 and 27.
    These figures show reference signs that identify the following elements:
    1 lever arm
    1st coupling body
    1b inside passage
     1c open ends
    1d lug
    1st through hole
    2 support
    2nd support shaft
    2b peripheral surface
    2c bottom plate
    2d lug
    2e screw
     2f nut
    2g washer
    2h screw head
    3 washing machine
     3rd housing
    3b front wall of the housing
    3c loading opening
    3d washing drum
     3e loading door
     3f wash tank
    3g drum rotation axis
    3h lift springs
    3i spring hooks to Cuba
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    3j cover wall
    3k housing base
    3l drive motor
    3m transmission band
     3n driven pulley
    3rd support arm
    3p casing side walls
     3q lower swivel joint
    3rd intermediate swivel joint
    3s pivot shaft
    3t upper swivel joint
    4 friction damping element
    4th internal axial pitch
     4b open base
     4c free end
     4d internal surface
    4e center band
     4f annular groove
     4g annular groove
     5 arched entree
    5th battlement
     6 axial recess
    7 perimeter wing
     8 arched projection
     9 axial nerve
    10 edge
    eleven ring interstitium
    MODES OF CARRYING OUT THE INVENTION
    Figures 1 and 2 show an embodiment of a washing machine -3- according to the present invention which, conventionally, comprises a housing -3a- comprising a front wall -3b- with a loading opening -3c- which allows access to the washing drum -3d-, and that is closed by a loading door -3e-, as well as a lower base -3k-.
    Inside the housing -3a- there is an oscillating group comprising a tank of
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    washing -3f- in which the washing drum -3d rotates, which has a front mouth facing the loading opening -3c-. The washing drum -3d- is connected to a driven pulley -3 connected in turn to a drive motor -3l- by a drive belt -3m-, so that the washing drum -3d- can rotate around a axis of rotation -3g-. The housing -3a- further comprises a rear wall (not shown in the figures), a cover wall -3j-, as well as two side walls -3p-. The washing tank -3f- is suspended in the housing -3a- superiorly by means of two support springs -3h- that are hooked inferiorly in respective hooks -3- on opposite sides of the carrying tank -3f- and superiorly in the wall of cover -3j- of the housing -3a-.
    As Figure 2 shows, the wash tank -3f- is supported on the base -3k-of the housing -3a- by a radial oscillation damping system comprising two support arms -3o- in the form of bars, connected inferiorly to the base -3k- of the housing -3a- through two lever arms -1- and supports -2- anchored to the base -3k of the housing -3a- in paths close to the respective side walls -3p - of the housing -3a-.
    Thus, the lower end of each support arm -3o- is articulated to one of the lever arms -1-, and each lever arm -1- is articulated to its respective support -2- by a lower joint -3q- .
    The lower joint -3q-comprises the shaft -2a- of the support -2-, with a bushing, a coupling body -1a- of the lever arm -1-, and a friction damping element -4- which is they will describe later in detail with reference to other figures, whereby the support -2- is articulated to the lever arm -1-, and in which the bushing -2a- of the support -2- acts as a pivot axis. In turn, the lever arm -1- is articulated to the support arm -3o- by means of an intermediate joint -3r- with a pivot axis -3s-. On the other hand, each support arm -3o- is superiorly articulated to the wash tank -3f- through a joint -3t- upper.
    In all the embodiments illustrated in Figures 3 to 6, 11 to 14, 18 to 20, 27 and 28, the lever arm -1- comprises a coupling body -1a- with an inner passage -1bdefined between two open ends - 1c- sides. The inner passage -1b- has an internal wall through which it is rotatably inserted in the peripheral surface -2b-of the bushing -2a- of a support -2- (figures 18-20, 27 and 28) to form the lower joint - 3q-, whereby the lever arm -1- is coupled to the support -2- (Figure 2-.
    From respective lateral parts of the coupling body -1a- sideways of lugs -1d- emerge laterally each of which comprises a through hole -1e-. The through holes -1e- are parallel with the inner passage -1b- of the coupling body -1a- and serve to accommodate a bolt through which the lever arm -1- is coupled, as can be seen
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    in figure 2, the support arm -3o- through the intermediate joint -3r-, the bolt forming the pivot axis -3s- of the intermediate joint -3r-.
    As Figure 18 shows, the support -2- comprises a lower plate -2c- whereby the support -2- is fixed to the casing of the washing machine. From the lower plate -2c, two lugs -2c emerge superiorly between which the bushing -2a- which crosses the inner passage -1b- of the coupling body element -1a- is arranged. The bushing -1 is immobilized between the lugs -2d- of the support -2- by means of a screw assembly -2e-and nut -2f-. The head -2h- of the screw -2e- and the nut -2f- embrace each other's outer surfaces of the lugs -2d-. Between the lugs -2d-and the head -2h- of the screw -2e-and the surface of the other lug -2d- were arranged paths -2g-.
    In the inner passage -1b- of the coupling body -1a-of the lever arm -1- a friction damping element -4- of elastically flexible material is inserted such that, when the coupling body -1a- is inserted on the bushing -2a-, it opposes a frictional resistance to the rotation of the lever arm -1- in the bushing -2a-. The friction damping element -4- is axially retained in the inner passage -1b- of the coupling body -1a-, by means of retaining elements.
    The inner passage -1b- has a cylindrical shape, while the friction damping element -4- is a tubular element with two free ends -4c-, an internal axial passage -4a- extending between respective open bases -4b- each surrounded by one of the free ends -4c-, and an outer wall connected at least partially to the inner wall of the coupling body -1a-. The outer wall of the friction damping element -4- comprises an internal friction surface -4d- intended to be pressed against a peripheral surface of the bushing -2a-.
    In the first embodiment of the damping device illustrated in Figures 3 to 10, retention elements are provided comprising a plurality of arches -5- arched at each of the free ends -4c- of the friction damping element -4- , so that each free end -4c- comprises battlements -5a- arranged between two incoming -5-, and arcuate projections -8- emerging from the inner wall in both extreme areas of the inner passage -1b- of the coupling body - 1a- inside the inner passage -1b-.
    Each recess -5- of each free end -4c- of the friction damping element -4- comprises a peripheral part that meets one of the protrusions -8- emerging from the inner wall of the coupling body -1a- so that the friction damping element -4- is axially retained by its recesses -5- between said projections -8-.
    In turn, each battlement -5a- of a free end -4c- of the friction damping element -4- protrudes between each of the projections -8- of the open ends of the wall
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    inside the coupling body -1a-, so that the friction damping element -4- is rotationally retained by its protruding battlements -5a- between said projections -8-.
    Each projection -8- of the coupling body -1a- is narrower than the recess -5- of the friction damping element -4- on which it is arranged, so that the friction damping element -4- and the Coupling body -1a-can freely rotate each other along an arc between 1O and 4O. With this characteristic it is achieved that in the face of the shortest and most frequent oscillations of the oscillating group of the washing machine, which are basically produced with the machine stabilized at constant speed of the washing drum, there is a free turning path in which the element of friction damping -4- does not rotate in the bushing -2a- and therefore does not transmit vibrations to the carcass of the washing machine.
    The recesses -5- of the friction damping element -4- are distributed equally at each of the free ends -4c- of the friction damping element -4-, while the projections -8- of the coupling body -1a - they are distributed equally in the inner wall of the coupling body -1a-. The recesses -5- of one of the free ends -4c- are arranged three-way with respect to the recesses -5- of the other of the free ends -4c- of the friction damping element -4-, in which case the projections - 8- of the coupling body -1a- emerging in one of the extreme zones of the inner passage -1b- are arranged three-way with respect to the protrusions -8- emerging in the other of the extreme zones of the inner passage -1b- of the inner passage -1b- of the coupling body -1a-.
    According to this first embodiment, the damping device comprises a three recesses -5- in each of the free ends -4c-of the friction damping element -4-, and three projections -8- in each of the extreme areas of the inner passage -1b-of the inner passage -1b- of the coupling body -1a-.
    The friction damping element -4- for this first embodiment of the damping device can be obtained by forming a cylinder from the strip shown in Figure 15, in which the recesses -5- and the battlements -5a- are preformed. .
    In the second embodiment of the damping device shown in Figures 11 to 17, the friction damping element -4- comprises three axial recesses -6- entering the outer wall of the friction damping element -4-, in which respective axial nerves -9- emerging from the inner wall surrounding the inner passage -1b- of the coupling body -1a- are housed. The friction damping element -4- is axially and rotationally retained by the axial recesses -6- and the axial ribs -9-. Axial recesses -6- and axial nerves -9- can be equidistant distributed in
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    radial direction of the friction damping element -4-and of the coupling body -1a-.
    Each axial recess -6- is transversely wider than the axial rib -9- disposed therein, so that the friction damping element -4- and the coupling body -1a- can freely rotate with each other along an arc between 1O and 4O. With this characteristic it is also achieved that in the face of the shorter and more frequent oscillations of the oscillating group of the washing machine, which are basically produced with the machine stabilized at a constant speed of the washing drum, there is a free turning path in which the element of friction damping -4- does not rotate in the bushing -2a- and, therefore, does not transmit vibrations to the housing of the washing machine.
    In the third, fourth and fifth embodiments of the damping device illustrated respectively in Figures 18 to 23, 24 to 27 and 28, the free ends -4c- of the friction damping element -4- are enlarged to form perimeter wings - 7- that externally embrace respective edges -10- that surround the open bases -1c- of the inner passage -1b-of the coupling body -1a-, so that the friction damping element -4- is axially retained by the wings perimeter -7-. The widened free ends of the friction damping element and the edges surrounding the open bases of the inner passage of the coupling body form axial retaining elements.
    The friction damping element -4- for this second embodiment of the damping device can be obtained by forming a cylinder from the strip shown in Figure 21, in which they are pre-formed recessed -6-.
    According to the third and fourth embodiment of the damping device, a central band -4e- emerging from the inner surface -4d- of the outer wall of the friction damping element -4- is provided, which, in the resting state of the radial damping device (figure 18), contact the peripheral surface -2b- of the bush -2a-. This central band -4e- is located between both lowered end portions of the inner surface -4a- which, as can be seen in Figures 19, 20 and 27, are only pressed against the peripheral surface -2b- of the bush -2a- from a certain lateral tilt of the lever arm -1- with respect to the support -2- in one direction or another.
    The friction damping element -4- for the third embodiment of the damping device can be obtained by forming a cylinder from the strip shown in Figure 21, on whose lateral edges the enlarged ends -4c- are formed which will form the wings perimetral -7-. and in whose central strip part the central band -4e- is preformed
    At the same time,
    The friction damping element -4- for the realization of the damping device can be obtained by forming a cylinder from the strip shown in Figures 25 and 26, on whose lateral edges the enlarged ends -4c- are formed which
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    they will form the perimetral wings -7-, and in whose central strip part the central band -4e- is preformed, while adjacent to the respective sides of its central strip -4e- there are provided grooves that will form the annular grooves -4f-.
    According to the fourth embodiment of the damping device illustrated in the
    5 figures 24 to 27, the friction damping element -4- comprises annular grooves -4f- entering in respective intermediate zones of two halves of the inner surface -4d-of the outer wall. Each annular groove -4f- is sized so that, when the lever arm -1- tilts laterally with respect to the support -2- and the coupling body -4a- presses diagonally opposite free ends -4c- of the zones
    10 intermediate against the peripheral surface -2b- of the bushing -2a-, the external wall of the friction damping element -4-flexes between the free ends -4c- pressed and the corresponding annular groove -4f-. The internal surface -4d- of the friction damping element -4- is polished, in order to eliminate and / or fill porosities therein, for example by polishing with a
    15 lubricant such as grease. This results in greater friction uniformity of the inner surface -4d-on the outer surface -2b-of the bush -2a-of the support -2-. According to the fifth embodiment of the damping device illustrated in Figure 28, a part of the internal surface -4d- of the friction damping element -4- is provided with annular grooves -4g-, which allows the lubricant to be retained, for example fat, in the grooves.
    权利要求:
    Claims (12)
    [1]

    1. Radial damping device of oscillations of an oscillating group of a washing machine, comprising a lever arm (1) with a coupling body (1a) with an internal passage (1b) rotatably insertable on a support shaft (2a) attachable to a part of a washing machine (3), and a friction damping element (4), which is inserted in the inner passage (1b) so that, when the coupling body (1a) is inserted on the support shaft (2a), it opposes a frictional resistance to the rotation of the lever arm (1) in the support shaft (2a), characterized in that it comprises retention elements (5, 6, 7, 8,
    10, 9, 10) axial provided in the friction damping element (4) and in the coupling body (1a) of the lever arm (1), which are associated with each other in a union to retain the damping element by friction (4) axially in the inner passage (1b) of the coupling body (1a).
    A damping device according to claim 1, characterized in that the inner passage (1b) is surrounded by an inner wall of the coupling body (1), has a cylindrical shape and is delimited by open ends (1c), the element of friction damping (4) is a tubular element with free ends (4c), an internal axial passage (4a) that extends between two open bases (4b) surrounded each 20 one by one of the free ends (4c), and a outer wall connected at least partially to the inner wall of the coupling body (1a),
    The outer wall of the friction damping element (4) comprises an internal surface (4d) of sliding friction on a peripheral surface of the support shaft (2a).
    25
    [3]
    3. Damping device according to claim 2, characterized in that
    the retention elements comprise a plurality of arcuate recesses (5) in
    each of the free ends (4c) of the friction damping element (4), so
    that each free end (4c) comprises battlements (5a) arranged between the recesses (5), and
    30 arched projections (8) emerging from the inner wall in the extreme areas of the inner passage (1b) of the coupling body (1a) towards the interior of the inner passage (1b); each recess (5) of each free end (4c) of the friction damping element
    (4) comprises a peripheral part that meets one of the protrusions (8) emerging from the inner wall of the coupling body (1a) so that the damping element
    35 by friction (4) is axially retained by its recesses (5) between said projections (8); each battlement (5a) of a free end (4c) of the friction damping element

    (4) protrudes between two of the projections (8) of the open ends of the inner wall of the coupling body (1a), so that the friction damping element (4) is rotationally retained by its protruding battlements (5a) between said projections (8).
    5. A damping device according to claim 3, characterized in that each projection
    (8) of the coupling body (1a) is narrower than the recess (5) of the friction damping element (4) in which it is arranged.
    [5]
    5. Damping device according to claim 3 or 4, characterized in that
    10 the recesses (5) of the friction damping element (4) are distributed equally at each of the free ends (4c) of the friction damping element (4); Y
    The projections (8) of the coupling body (1a) are distributed equally in the inner wall of the coupling body (1a).
    fifteen
    [6]
    6. Damping device according to one of claims 3 to 5, characterized in that the recesses (5) are arranged facing the battlements (5a) of the friction damping element (4).
    A damping device according to claim 2, characterized in that it comprises a plurality of axial holes (6) entering the outer wall of the friction damping element (4) in which respective axial ribs (9) emerging from the inner wall surrounding the internal passage (1b) of the coupling body (1a), so that the friction damping element (4) is axially and
    25 rotationally retained by axial recesses (6) and axial nerves (9).
    [8]
    8. Damping device according to claim 7, characterized in that the axial recesses (6) and axial ribs (9) are equidistant radially distributed from the friction damping element (4) and the coupling body (1a).
    30
    [9]
    9. Damping device according to claim 7 or 8, characterized in that each axial recess (6) is transversely wider than the axial rib (9) disposed therein.
    [10]
    10. Damping device according to any one of claims 2 and 7 to 9,
    35 characterized in that the free ends (4c) of the friction damping element (4) are widened to form perimeter extensions (7) that externally embrace
    5
    10
    fifteen
    twenty
    25
    30
    35

    edges (10) surrounding the open bases (1c) of the inner passage (1b) of the coupling body (1a), so that the friction damping element (4) is axially retained by the perimeter wings (7).
    [11]
    11. Damping device according to claim 10, characterized in that
    it comprises a central band (4e) emerging from the inner surface (4d) of the outer wall of the friction damping element (4), which, in the rest state of the radial damping device, contacts the peripheral surface (2b) of the shaft support (2a);
    the central band (4e) is between the lowered end portions of the inner surface (4a) that are only pressed against the peripheral surface (2b) of the support shaft (2a) from a certain lateral tilt of the lever arm ( 1) with respect to the support (2) in one direction or another.
    [12]
    12. Damping device according to claim 10 or 11, characterized in that the friction damping element (4) comprises incoming annular grooves (4f)
    in intermediate areas of the inner surface (4d) of the outer wall; each annular groove (4f) is sized so that when the lever arm
    (1) swing laterally with respect to the support (2) and the coupling body (4a) presses diagonally opposite free ends (4c) of the intermediate zones against the peripheral surface (2b) of the support shaft (2a), the outer wall of the friction damping element (4) flexes between the pressed free ends (4c) and the corresponding annular groove (4f).
    [13]
    13. Damping device according to any one of claims 2 to 12, characterized in that at least a part of the internal surface (4d) of the friction damping element (4) is provided with annular grooves (4g).
    [14]
    14. Articulation device comprising a support (2) attachable to a part of a washing machine (3), and a damping device comprising a lever arm
    (1) comprising a coupling body (1a) with an inner passage (1b) rotatably inserted on a support shaft (2a) of the support (2) and a friction damping element (4), which is inserted into the inner passage (1b) so that, when the coupling body (1a) is inserted on the support shaft (2a), it opposes a frictional resistance to the rotation of the lever arm (1) on the support shaft (2a) , characterized in that the damping device is the radial oscillation damping device defined in any one of claims 1 to 14.

    [15]
    15. Washing machine comprising a housing (3a) that houses an oscillating group comprising a washing tank (3f) in which a washing drum (3d) rotated by a motor (3l) rotates, the tank (3f) being ) connected to the housing (3a) superiorly by at least 5 a pair of support springs (3h) and inferiorly through a radial damping system articulated to the housing (3a), the radial damping system comprising a damping device comprising a support (2) fixed to the housing (3a) of the washing machine (3), a lever arm (1) comprising a coupling body (1a) with an inner passage (1b) rotatably inserted on a support shaft (2a) and a
    10 friction damping element (4), which is inserted in the inner passage (1b) so that, when the coupling body (1a) is inserted on the shaft (2a), it opposes a frictional resistance to the rotation of the arm lever (1) on the shaft (2a), characterized in that the damping device is the radial oscillation damping device defined in any one of claims 1 to 14.
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    同族专利:
    公开号 | 公开日
    ES2547364B1|2016-07-14|
    EP3126560A1|2017-02-08|
    CN106133230B|2018-03-09|
    WO2015151020A1|2015-10-08|
    CN106133230A|2016-11-16|
    引用文献:
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    FR2863991B1|2003-12-23|2007-02-23|Valeo Systemes Dessuyage|ARRANGEMENT FOR GUIDING A DRIVING MECHANISM DRIVE SHAFT FOR CLEARING THE DRIVE SHAFT IN THE EVENT OF A SHOCK|
    ES2376863B1|2009-08-07|2013-01-31|Bsh Electrodomésticos España, S.A.|WASHING MACHINE.|
    EA023587B1|2009-12-10|2016-06-30|Бсх Хаусгерете Гмбх|Household appliance for laundry treatment, in particular washing machine or dryer|
    ES2435102B1|2012-05-23|2014-09-24|Bsh Electrodomésticos España, S.A.|Rotary damping device for home appliance|
    ES2431464B1|2012-05-23|2014-09-10|Bsh Electrodomésticos España, S.A.|Radial shock absorber with free travel, and domestic appliance with a damping system comprising said radial damper|US9963814B2|2014-07-11|2018-05-08|Lg Electronics Inc.|Washing machine|
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    CN111254657A|2020-01-19|2020-06-09|无锡小天鹅电器有限公司|Connecting beam, clothes treatment equipment and supporting frame thereof|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201430501A|ES2547364B1|2014-04-04|2014-04-04|Radial damping device of oscillations of an oscillating group of a washing machine, articulation device and washing machine comprising the damping device|ES201430501A| ES2547364B1|2014-04-04|2014-04-04|Radial damping device of oscillations of an oscillating group of a washing machine, articulation device and washing machine comprising the damping device|
    CN201580016995.3A| CN106133230B|2014-04-04|2015-03-31|Radial direction damping unit, articulated mounting and the washing machine including damping unit of the vibration of oscillating unit from washing machine|
    EP15718100.9A| EP3126560A1|2014-04-04|2015-03-31|Device for radial damping of oscillations from an oscillating unit of a washing machine, articulation device and washing machine that comprises the damping device|
    PCT/IB2015/052353| WO2015151020A1|2014-04-04|2015-03-31|Device for radial damping of oscillations from an oscillating unit of a washing machine, articulation device and washing machine that comprises the damping device|
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