ES2592570B1 - AMORTIGUATION DEVICE - Google Patents

Abstract

The invention provides a vibration damping device (1) for a washing tank (10) of a washer or dryer machine which also comprises a housing (11). A first articulation piece (2) has a first end (21) and a second end (22), the first end (21) of the first articulation piece (2) being provided to be articulated to the wash tank ( 10), by means of a first joint (4). A second articulation piece (3) has a first end (31) and a second end (32), the first end (31) of the second articulation piece (3) being articulated joined to the second end (22) of the first joint piece (2), by means of a second joint (5). The second end (32) of the second articulation piece (3) is provided to be attached to the housing (11) by means of a third joint (6) which allows the rotation around a third axis. The first joint (4), the second joint (5) and / or the third joint (6) offers resistance to frictional rotation, and the first joint piece (2) and / or the second joint piece (3) are made of a thermally conductive material and is part of at least one friction joint having relative movement with respect to the friction element (9).

Description

OBJECT OF THE INVENTION

The present invention is directed to a vibration damping device for oscillation that takes place in an oscillating element, being particularly suitable for use in the washing tank of a washing machine or dryer.

BACKGROUND OF THE INVENTION

Document ES 2387205 81 shows a vibration damping device for oscillation in a washing machine. This device allows to dampen the oscillation generated by the drum of the washing machine, by means of a system comprising a support element, a joint piece and a rotating joint. By means of this configuration it is intended to achieve a way of damping the oscillations by means of a rotary damping system. However, this configuration does not take into account the problem of dissipation of the friction energy generated in the damping device.

DESCRIPTION OF THE INVENTION

The present invention proposes a solution to this problem by means of a damping device according to claim 1 and a washer or dryer machine according to claim 13. Preferred embodiments of the invention are defined in the dependent claims.

A first inventive aspect of the invention relates to a vibration damping device for a washing tank of a washing machine or dryer which also comprises a housing, the device comprising:

a first articulation piece, with a first end and a second end the first end of the first articulation piece being provided to be articulated to the wash tank, by means of a first joint that allows the rotation around a first axis rotation,

a second articulation piece, with a first end and a second end, the first end of the second articulation piece being articulated joined to the second end of the first articulation piece, by means of a second articulation that allows the rotation around of a second axis of rotation, and the second end of the second articulation piece being provided to be attached to the housing by means of a third joint that allows the rotation around a third axis of rotation,

wherein the first joint, the second joint and / or the third joint is a joint comprising a friction element that offers resistance to frictional rotation,

where at least one of the first or second articulation pieces is made of a thermally conductive material and is part of at least one friction joint having relative movement with respect to the friction element.

This device offers the advantage of providing a heat evacuation path generated by the friction that takes place in the joint that offers resistance to friction rotation avoiding the risk of overheating due to a prolonged operation over time of said device that could damage or even destroy the friction element thereof. By thermal conductive material, a material having a thermal conductivity greater than 5 W / (m · K), preferably greater than 10 W / (m · K) and more preferably greater than 40 W / (m · K), is to be understood.

In a radial damping device, it is considered a joint that offers resistance to friction rotation, or friction joint, that in which the friction values during the rotation thereof exceed 10 N, being preferably between 20 NY 120 NY more preferably between 30 NY 60 N.

In a particular embodiment, the articulation that offers resistance to frictional rotation comprises a bushing which in the axis of rotation is crossed by a bolt connected to at least one lug, so that between the gland and the at least one lug is disposed a friction element and the bushing and / or the lug is made of thermoconductive material and is thermoconductively connected to the articulation part of thermoconductive material. Preferably the bolt is connected to two lugs preferably arranged in a U shape on each side of the bushing which makes the structure of the joint more rigid. The two lugs can pinch the bushing tightly and both can have a friction element between the bushing and the bushing.

In a particular case of this previous embodiment with only one lug at the end of any of the articulation pieces and / or in the wash tank and / or in the housing, the bolt may contain at its fly end a stop and between this and the bushing, a friction element trapped between them thereby increasing the friction surface.

In a particular case of this previous embodiment, the friction element is integrally attached to the at least one lug and the bushing is made of thermoconductive material and is thermoconductively connected to one end of the articulation piece of thermoconductive material thus increasing the heat dissipation of friction generated in the friction joint.

In another particular case of this previous embodiment, the friction element is integrally attached to the bushing and the at least one lug is made of thermoconductive material and is thermoconductively attached to one end of the articulation piece of thermoconductive material thereby increasing the friction heat dissipation generated in the friction joint.

In another particular embodiment, the articulation that offers resistance to frictional rotation comprises a bushing which in the axis of rotation is crossed by a bolt integral to at least one lug, so that between the bushing and the bolt an element of trapped is arranged Friction and the bushing and / or lug is made of thermoconductive material and is thermoconductively attached to the articulation part of thermoconductive material. . Preferably the bolt is integrally attached to two lugs preferably arranged in a U-shape on each side of the bushing which makes the structure of the joint more rigid.

Arranging the friction element not attached to any element in any of the first, second and / or third rotation joint has the advantage that the heat dissipation generated in said friction joint can be evacuated through both articulation pieces or either through one of the articulation pieces and also the washing tank or the housing thereby increasing the heat dissipation surface. It is advantageous in the intermediate joint when the two articulation pieces are made of thermoconducting material and can dissipate heat. And it can also be interesting for the end joints both as soon as heat dissipates through the housing and the tank.

In a particular case of this previous embodiment, the friction element, of the joint that offers resistance to frictional rotation, is integrally attached to the bolt and the bushing is made of thermoconducting material and is thermoconductively connected to one end of The articulation piece of thermoconducting material thus increasing the heat dissipation of friction generated in the friction joint.

In a particular case of this previous embodiment, the friction element, of the joint that offers resistance to frictional rotation, is integrally attached to the bushing, and the bolt is made of thermoconducting material and is thermoconductively attached to an articulation end of thermally conductive material thus increasing the heat dissipation of friction generated in the friction joint.

In the event that one of the articulation pieces is not made of thermoconducting material, the most advantageous configuration is that in which the friction element joins in a preferred manner to the part that is not made of thermoconductive material so that only the part of thermally conductive material have relative movement with the friction element and dissipates the heat produced in the friction joint.

In this way the bushing can be arranged at one end of one of the articulation pieces and then the lugs are arranged at one end of the other articulation piece and / or in the washing tank and / or in the housing. Or, the bushing can be arranged in the washing tank and / or in the housing and the lugs are arranged at one end of one of the articulation pieces. With this, the articulation that offers the resistance to rotation in any of the three, first, second and third articulation can be arranged and in addition to this, a greater contact surface of the friction element with the bushing and bolt is achieved.

The joint that offers resistance to frictional rotation can be a combination of the previous embodiments when one or more friction elements are available such that friction takes place both between bushing and bolt and between bushing and lugs thereby increasing the friction surface allowing the creation of a damping device with greater friction force in a simple way. In any of the above embodiments, the bushing or at least one lug of the joint that offers resistance to frictional rotation can be located at the junction between the first end of the first joint piece and the wash tank. In this way, either the bushing or the at least one lug could be part of the washing tank or be connected to it in a thermoconductive manner through an additional piece or plate of thermoconducting material. The advantage of this configuration is that it could be used up to the entire surface of the wash tank as a radiating element to dissipate the heat of friction produced in the joint that offers resistance to frictional rotation. In this case the heat of friction dissipated by the washing tank can be used to heat the water inside.

The friction element is preferably of a high compression material, in particular an expanded polyurethane sponge, for example from Cellasto ®.

In a particular embodiment, the articulation piece made of thermoconductive material comprises a bushing and / or at least one integrated lug. In this way the total number of parts of the vibration damping device is reduced and the productive realization thereof is facilitated. In a particular embodiment, the thermally conductive material is a metal such as steel, aluminum, zinc, copper, zamak, stainless steel, bronze, brass and / or titanium or alloys of the above or of any buckling resistant material having a conductivity adequate thermal.

In a particular embodiment, the articulation piece made of thermoconductive material is a bent sheet or, the articulation part made of thermoconductive material is composed of two or more pieces joined together. The two pieces may or may not be identical.

These particular embodiments offer the advantage of better serial manufacturing, since their manufacturing involves easily assumable operations on an assembly line, such as stamping and bending of sheet metal.

If one of the articulation pieces is not made of thermoconducting material, then it will be smaller than the articulation piece of thermoconductive material, thus ensuring that more heat dissipates than would dissipate if the articulation piece of material thermoconductor out of shorter length. Ideally, the two articulation pieces should be made of thermoconducting material.

In a second inventive aspect of the invention it refers to a washing machine or dryer comprising at least one vibration damping device according to the first inventive aspect.

The vibration damping devices can be fixed to the sides of the housing, either fixed to the bottom of the housing or they could be fixed in parallel to the suspension elements in the upper or lower part of the washing tank. Said washer or dryer machine may contain a plurality of damping devices located on one or both sides of the wash tank.

All features and / or the method steps described herein (including the claims, description and drawings) may be combined in any combination, except for combinations of such mutually exclusive features.

DESCRIPTION OF THE DRAWINGS

These and other features and advantages of the invention will become more clearly apparent from the detailed description that follows in a preferred embodiment, given only by way of illustrative and non-limiting example, with reference to the accompanying figures. .

Figures 1 a-1 b

In these figures be sample a particular realization of a device

vibration damper according to the invention.

Figure 2

This figure shows an alternative embodiment of a joint of

a vibration damping device according to the invention.

Figures 2a-2b

An alternative embodiment of a joint is shown in these figures.

of a vibration damping device according to the invention.

Figures 3a-3b

An alternative embodiment of a joint is shown in these figures.

of a vibration damping device according to the invention.

Figure 4

In this figure be shows a section of an alternative embodiment of

a

articulation of a vibration damping device according to the

invention.

Figure 5

This figure shows a first particular embodiment of a piece

of articulation of a damping device according to the invention.

Figure 6

This figure shows a second particular embodiment of a piece

of articulation of a damping device according to the invention.

Figure 7

This figure shows a third particular embodiment of a piece

of articulation of a damping device according to the invention.

Figure 8

This figure shows a possible configuration of washing machine or

dryer

containing he device shock absorber from vibrations from

according to the invention.

DETAILED EXHIBITION OF THE INVENTION

Figure 1a shows a particular embodiment of a vibration damping device 1 according to the invention in a use situation, installed in a washer or dryer machine. This figure shows the following elements, which are part of this vibration damping device 1:

a first articulation piece 2, with a first end 21 and a second end

22. The first end 21 of the first articulation piece 2 is connected in an articulated manner to the washing tank 10, by means of a first articulation 4 which allows the rotation around a first axis of rotation. a second articulation piece 3, with a first end 31 and a second end

32. The first end 31 of the second articulation piece 3 is articulatedly connected to the second end 22 of the first articulation piece 2, by means of a second joint 5 which allows the rotation around a second axis of rotation, and the second end 32 of the second articulation piece 3 is connected to the housing 11 by means of a third joint 6 which allows the rotation around a third axis of rotation.

In this particular example of a damping device 1 of the invention, the second joint 5 is a joint that offers resistance to frictional rotation. In addition, the first articulation piece 2 and the second articulation piece 3 are made of a thermally conductive material.

In this particular example, both the first joint 4, which is the joint between the first end 21 of the first joint piece 2 and the reservoir 10 and the third joint 6, which is the joint between the second end 32 of the second piece of articulation 3 and the housing 11, are not friction joints whereby the through axes that pass through the holes included in the ends 21 and 32 of the articulation pieces 2 and 3 to be joined with the washing tank 10 and the housing 11 , said axes of limiters having at their ends intended to prevent them from leaving the holes.

Figure 1 b shows an enlargement of the second joint 5, in which a lug 12 of the second end 22 of the first joint piece 2 has been cut so that the detail of the second joint 5 is better observed. It shows how the second joint 5 is a joint that offers resistance to frictional rotation. This articulation comprises a bushing 7 which, in the rotation axis, is crossed by a bolt 8 integral with the lugs 12, so that between the bushing 7 and the bolt 8 a friction element 9 is arranged trapped. In this particular case the element Friction is a friction foam, which opposes the rotation between said elements. The friction element can be either integral to the bushing 7 so that friction is made on bolt 8 or integral with bolt 8 so that friction occurs in bushing 7 or neither of them so that friction occurs in both ends of the articulation pieces and thereby dissipate heat through both. In this case, the bolt 8 must be integral with the lug 12.

In figure 2 a first joint 4 is observed, which is a joint that offers resistance to frictional rotation. In this case, this first joint 4 comprises lugs attached to the washing tank 10 and a socket 7 corresponding to the first end 21 of the first articulation piece 2 which is crossed by a bolt 8 connected to the lugs 12, so that a friction element 9 is arranged between the bushing 7 and the lugs 12. It is an alternative configuration to that presented in the previous figure 1 b, the general operation of the system being the same in one case and another, except for the fact that the resistance to rotation is provided between the bushing 7 and the ear 12 and not between the bushing 7 and the bolt 8.

In the event that the friction element 9 is integral with the lugs 12 located in the washing tank 10, the articulation part 2 must be made of heat-conducting material, or if the friction element 9 is integral with the sleeve 7 located at the end 21 of the articulation piece 2, the wash tank must contain a thermally conductive surface

or be of a thermoconductive material.

A variant of the second joint 5 is shown in Figure 2a, which is a joint that offers resistance to frictional rotation. In this case, this second joint 5 comprises a bushing 7 corresponding to the first end 31 of the second articulation piece 3, which in the axis of rotation is crossed by a bolt 8 connected to the lugs 12 located at the second end 22 of the first piece. of articulation 2, so that a friction element 9 is arranged between the bushing 7 and the lugs 12.

Figure 2b shows an enlargement of the second joint 5, in which one of the lugs 12 located at the second end 22 of the first joint piece 2 has been cut so that the detail of the second joint 5 is better observed. it is observed that this second joint 5 comprises a bushing 7 corresponding to the first end 31 of the second articulation piece 3 which on the axis of rotation is crossed by a bolt 8 connected to the lugs 12 located at the second end 22 of the first articulation piece 2, so that a friction element 9 is arranged between the bushing 7 and the friction lugs 13.

In figure 3a a joint variant is shown in this case the second joint 5 which is a joint that offers resistance to frictional rotation. In this case, this second joint 5 comprises a bushing 7 corresponding to the first end 31 of the second joint piece 3 which in the rotation axis is crossed by a bolt 8 connected to the lug 12 located at the second end 22 of the first articulation piece 2, so that a friction element 9 is arranged between the bushing 7 and the lug 12, the bolt 8 itself can also have a stop 13 at its cantilever end facing that provided by the second end 22 of the first articulation piece 2 to give greater rigidity to the second articulation 5. Between the bushing 7 and this stop 13 a friction element 9 is arranged trapped.

Figure 3b shows an enlargement of the second joint 5, in which the stop 13 is not present and the bolt 8 with the friction element 9 is visible. It shows that this second joint 5 comprises a corresponding bushing 7 to the first end 31 of the second articulation piece 3 which in the rotation axis is crossed by a bolt 8 connected to the lug 12 located at the second end 22 of the first articulation piece 2, so that between the bushing 7 and the lug 12 is arranged in a friction element 9.

Figure 4 shows a section of the second joint 5, which is a joint that offers resistance to frictional rotation. In this case, this second joint 5 comprises a bushing 7 corresponding to the first end 31 of the second articulation piece 3, which in the axis of rotation is crossed by a bolt 8 connected to the lugs 12 located at the second end 22 of the first piece. of articulation 2, so that between the bushing 7 and the lugs 12 and between the bushing 7 and the bolt 8 a friction element 9 is arranged trapped. In this case, the friction element 9 is a single piece although it can be of several pieces.

Figures 5 to 7 show different embodiments of first articulation pieces 2 made of thermoconducting material, which could also function as a second articulation piece 3 in any vibration damping device 1 according to the invention.

Figure 5 shows a first particular embodiment of a first articulation piece 2 which is a bent sheet. In this embodiment, the first end 21 of the first articulation piece 2 defines a through hole suitable for forming part of a joint, and the second end 22 of the first articulation piece 2 comprises two lugs 12 containing one of them a threaded hole 81 on one of the lugs to facilitate the attachment of the bolt R In addition, it is a piece obtainable by a relatively simple manufacturing method.

Figure 6 shows a second particular embodiment of a first articulation piece 2 which is composed of two parts joined together. In this particular example, both parts are symmetric, although in other particular examples, the parts are not entirely symmetrical, since there may be some detail that exists only in one of the two halves. These parts can be manufactured by stamping and allow their union by snap fit. In this figure it can be seen that the first end 21 of the first articulation piece 2 defines a through hole suitable for forming part of a joint, and the second end 22 of the first articulation piece 2 comprises two lugs 12.

Figure 7 shows a third particular embodiment of a first articulation piece 2 comprising an integrated bushing 7. This first articulation piece 2, manufactured with the integrated bushing, allows its coupling in a vibration damping device much easier, since coupling of the bushing is not required once the workpiece is manufactured.

Figure 8 shows a possible configuration of a washer or dryer machine containing at least one vibration damping device according to the invention. In this particular example, a washing tank 10 is shown comprising a drum 28 which is driven by a motor 25 that transmits the movement to the drum through a

5 pulley mechanism 29 integral to the drum and connected to the motor by a belt 27. Said washing tank is connected to the housing 11 by suspension elements 17 and by two vibration damping devices according to the invention. In figure 8 the vibration damping devices are fixed to the sides of the housing 11.

Claims (14)

1. Vibration damping device (1) for a wash tank (10) of a washer or dryer machine also comprising a housing (11), the device comprising: a first articulation piece (2), with a first end (21) and a second end (22), the first end (21) being of the first articulation piece (2) intended to be articulated to the wash tank (10), by means of a first articulation (4) that allows the rotation around a first axis of rotation, -a second articulation piece ( 3), with a first end (31) and a second end (32), the first end (31) of the second articulation piece (3) being articulated joined to the second end (22) of the first articulation piece (2), by means of a second joint (5) that allows the rotation around a second axis of rotation, and the second end (32) of the second articulation piece (3) being provided to join the housing (11 ) by means of a third joint (6) that allows the rotation around a third ej e of rotation, -in which the first joint (4), the second joint (5) and / or the third joint (6) is a joint comprising a friction element (9) that offers resistance to frictional rotation, characterized in that at least one of the first (2) or second (3) articulation pieces is made of a thermoconducting material and is part of at least one friction joint having relative movement with respect to the friction element (9).

2.

Vibration damping device (1) according to claim 1, characterized in that the joint that offers resistance to frictional rotation comprises a sleeve (7) which in the axis of rotation of the joint can be pierced by a bolt (8) connectable to at least one lug (12), so that a friction element (9) can be arranged between the bushing (7) and the at least one lug and the bushing and / or the lug is made of thermoconductive material and is connected thermoconductive form to the articulation piece of thermoconductive material.

3.

Vibration damping device (1) according to claim 2, characterized in that the friction element (9) can be joined in solidarity with the at least one lug (12) and the bushing (7) is made of thermoconductive material and is thermoconductively connected to one end (21, 22, 31, 32) of the articulation piece of thermoconductive material.

Four.

Vibration damping device (1) according to claim 2, characterized in that the friction element (9) can be joined in solidarity with the bushing (7) and the at least one lug (12) is made of thermoconductive material and is joined by thermoconductive shape at one end (21, 22, 31, 32) of the articulation piece of thermoconductive material.

5.

Vibration damping device (1) according to one of the preceding claims, characterized in that the joint offering frictional resistance to rotation comprises a bushing (7) which can be crossed by a bolt on the axis of rotation

(8) available in solidarity with at least one lug (12), so that between the bushing (7) and the bolt (8) a friction element (9) and the bushing and / or the bolt and / and the bolt are available The lug is made of thermoconductive material and is thermoconductively connected to the articulation part of thermoconductive material.

6.

Vibration damping device (1) according to claim 5, characterized in that the friction element (9) can be joined in solidarity with the bolt (8) and the bushing (7) is made of thermoconductive material and is thermoconductively connected to one end (21, 22, 31, 32) of the articulation piece of thermoconductive material.

7.

Vibration damping device (1) according to claim 5, characterized in that the friction element (9) can be joined in solidarity with the bushing (7), the bolt (8) is made of thermoconductive material and is thermoconductively connected to a end (21,22,31, 32) of the articulation piece of thermoconductive material.

8.

Vibration damping device (1) according to any of the preceding claims, characterized in that the articulation part (2, 3) made of thermoconductive material comprises a bushing (7) and / or at least one integrated lug (12).

9.

Vibration damping device (1) according to any of the preceding claims, characterized in that the thermoconductive material is made of metal, in particular steel, aluminum, stainless steel, bronze, brass and / or titanium or alloys of the foregoing.

10.

Vibration damping device (1) according to any of the preceding claims, characterized in that at least one of the articulation pieces made of thermoconductive material (2, 3) is a bent sheet.

5 11. Vibration damping device (1) according to any one of claims 1 to 9, characterized in that at least one of the articulation pieces (2, 3) made of thermoconductive material is composed of two parts joined together. 12. Vibration damping device (1) according to one of the preceding claims 10 characterized in that one of the articulation pieces is not made of thermoconducting material and is shorter than the articulation part of thermoconductive material. 13. Washer or dryer machine comprising at least one 15 vibration damping device (1) according to any of the preceding claims. 14. Washer or dryer machine according to claim 13 characterized in that it comprises a housing and because the at least one ear and / or bushing is attached to the housing and the articulation piece of thermoconductive material is attached to said ear 20 and / or said bush forming the third joint (6). 15. Washer or dryer machine according to claim 13 or 14, characterized in that it comprises a washing tank and because the at least one lug and / or bushing is connected to the washing tank and the articulating piece of thermoconductive material is 25 attached to said lug and / or said cap forming the first joint (4).