JP2006061613A - Drum type washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain sufficient damping force to the inclination of a water tub as well as effectively obtaining sufficient damping force to the vibration of the water tub along the axial direction of dampers. <P>SOLUTION: In this drum type washing machine supporting the water tub 27 provided with a drum 30 inside, by the dampers 33 and rubber vibration isolators 35, 36, 43 stacked thereon, the rubber vibration isolators 35, 36, 43 have outlines shaped to have linear portions parallel with an orthogonal direction to the direction of vibration in a specific direction of the water tub 27. Portions, long in distance from the axis of the water tub 27, of the rubber vibration isolators 35, 36, 43 where large reaction is generated, are thereby increased, and large reaction is generated in total by that portion to obtain sufficient damping force to the inclination of the water tub 27. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a drum-type washing machine having a structure in which a water tank in which a drum is installed is supported by a damper and a vibration-proof elastic member laminated thereon.

Conventionally, in a drum type washing machine, a drum is installed in a water tank. The drum rotates on the horizontal axis, and is driven to rotate by a motor. Some drums wash and dehydrate laundry stored therein, and further dry the laundry. Therefore, when the laundry is finished, the laundry may remain in the drum, and when the dehydration is started in this state, a large vibration may be generated due to the centrifugal force of the laundry positioned in the offset. Are known.
In order to cope with this, the water tank is supported by a damper so that vibration is reduced (damped). The damper is laminated with anti-vibration rubber as an anti-vibration elastic member so as to function as a cushion.

FIG. 13 representatively shows the support structure as a set. Anti-vibration rubbers 2 and 3 are arranged above and below a lower support plate 1 fixed to a base plate (not shown) of a washing machine outer shell. The lower part of the movable rod 4a of the damper 4 passes through these, and the lower part is fixed by tightening the nut 6 via the washer 5.
The damper 4 is a friction damper, for example, and has a friction member (not shown) such as rubber attached to the upper part of the movable rod 4a in close contact with the inside of the cylinder 4b. Between the cylinder 4b of the damper 4 and the anti-vibration rubber 2 on the lower support plate 1, springs 7 are arranged up and down via washers 8 and 9, respectively.

On the other hand, anti-vibration rubbers 11 and 12 are arranged above and below the upper support plate 10 fixed to a water tank (not shown), and a fixed shaft portion 4c on the cylinder 4b of the damper 4 passes through the upper support plate 10 so that the upper portion The nut 14 is tightened through the washer 13 and fixed.
Thus, the water tank in which the drum is installed is configured to be supported by the damper 4 and the anti-vibration rubbers (anti-vibration elastic members) 2, 3, 11 and 12 laminated thereon.

In this configuration, the anti-vibration rubbers 2, 3, 11, and 12 are each disc-shaped, as shown in FIGS. 14 and 15, respectively, in a plan view and in a vertical side view in FIG. However, the anti-vibration rubbers 2 and 12 have holes 2a and 12a through which the movable rod 4a and the fixed shaft portion 4c of the damper 4 respectively penetrate at the center, and the protrusions 2b and 12b. The anti-vibration rubbers 3 and 11 have holes 3a and 11a through which the movable rod 4a and the fixed shaft portion 4c of the damper 4 respectively penetrate in the center, and the convex portions of the anti-vibration rubbers 2 and 12 respectively. 2b and 12b have recesses 3b and 11b that fit into each other.
JP 2001-212395 A

  In the case of the above conventional one, a damping force is effectively obtained by the damper 4 for the vibration of the water tank along the axial direction of the movable rod 4a of the damper 4, but the damping force with respect to the inclination of the water tank accompanying the vibration is This is not obtained with the damper 4 and is only obtained as a secondary effect by the elastic force of the anti-vibration rubbers 2, 3, 11 and 12. Therefore, the damping force against the inclination of the water tank cannot be obtained sufficiently. there were.

  The present invention has been made in view of the above-described circumstances, and therefore the object is not only to obtain a sufficient damping force against the vibration of the aquarium along the axial direction of the damper, but also to provide a sufficient damping force against the inclination of the aquarium. To provide a drum type washing machine that can be obtained.

  In order to achieve the above object, in the drum type washing machine of the present invention, the water tank in which the drum is installed is supported by the damper and the vibration proof elastic member laminated on the damper. The contour has a shape having a linear portion parallel to a direction orthogonal to the vibration direction with respect to the vibration in a specific direction of the water tank.

The inventor investigated the reason why the damping force with respect to the inclination of the aquarium could not be sufficiently obtained with the conventional one, and the following was found.
When the water tank vibrates and tilts, it becomes as shown in FIG. In addition, this FIG. 16 has shown the state in which the water tank inclined as the state inclined in the left lower direction in the figure. When the water tank is tilted, the anti-vibration elastic member generates a reaction force in proportion to or in inverse proportion to the distance from the axis of the water tank, and this acts as a damping force against the inclination of the water tank.

  Since the conventional vibration-proof elastic members (vibration-proof rubbers 2, 3, 11, and 12) are all disk-shaped, the distance from the axial center of the water tank varies along the arc, and the obtained anti-vibration members are obtained accordingly. The power is also different. As an example, in the inclination of the water tank shown in FIG. 16, as the distance decreases from the largest part from the axis of the water tank, as shown by the arrow P in FIG. The reaction force P gradually decreases, and on the contrary, the vibration isolation rubbers 2 and 12 increase the distance from the smallest distance from the axis of the aquarium as indicated by the arrow P in FIG. Accordingly, the reaction force P is gradually reduced. For this reason, in the conventional one, the damping force with respect to the inclination of the water tank could not be sufficiently obtained.

  On the other hand, as described above, the anti-vibration elastic member has a shape that has a portion in which the contour forms a straight line parallel to the direction orthogonal to the direction of the vibration with respect to the vibration in the specific direction of the water tank. In this case, there are many large or small portions that are large in the distance from the axis of the water tank that generate a large reaction force, so that a large reaction force is generated as a whole, and the damping force against the inclination of the water tank is sufficient. (See FIGS. 6 and 7).

Hereinafter, a first embodiment (first embodiment) of the present invention will be described with reference to FIGS.
First, FIG. 1 shows the entire drum-type washing machine as viewed from the longitudinal side, and includes a base plate 21, an outer box 22 placed and coupled thereto, and a top cover 23 attached to the outer box 22. Thus, the outer shell 24 is composed. In addition, the top cover 23 is provided with a laundry entrance 25 and is pivotally provided with a lid 26 having, for example, a folded structure for opening and closing the entrance 25.

  A water tub 27 is disposed inside the outer shell 24. The water tub 27 has a cylindrical shape in which the left and right sides (in a direction orthogonal to the paper surface of FIG. 1) are axial, and has a laundry passage 28 at the top. The water tank lid 29 opens and closes it. In addition, a drum 30 is disposed inside the water tank 27. This drum 30 also has a cylindrical shape in which the left and right (in the direction orthogonal to the paper surface of FIG. 1) are axial, and a laundry passage 31 is provided at the top. The drum lid 32 opens and closes it.

  The drum 30 is driven to rotate on the horizontal axis by a motor (not shown) attached to the side surface of the water tank 27. Accordingly, the drum 30 is integrated with the water tank 27 via the motor. With this configuration, the laundry accommodated in the drum 30 is washed and dehydrated by the rotation of the drum 30 and further rotated by the rotation of the drum 30 until drying.

  Dampers 33 are disposed below the lower portions of the front and rear (left and right in FIG. 1) portions of the water tank 27, respectively. The damper 33 is, for example, a friction damper, and has a friction member (not shown) such as rubber attached to the upper portion of the movable rod 33a shown in FIG. 2 in close contact with the inside of the cylinder 33b.

On the other hand, the lower support plate 34 is fixed to the front and rear portions of the base plate 21, and vibration isolating rubbers 35 and 36 are disposed as vibration isolating elastic members above and below the lower support plate 34, respectively. The vibration-insulating rubbers 35 and 36 and the lower support plate 34 are fixed by passing through the lower part of the movable rod 33a of the damper 33 and tightening the nut 38 via the washer 37 at the lower part.
Further, a spring 39 is disposed between the cylinder 33 b of the damper 33 and the vibration-proof rubber 35 on the lower support plate 34 via washers 40 and 41 respectively.

On the other hand, an upper support plate 42 is fixed to the lower part of the front and rear portions of the water tank 27, and vibration isolating rubbers 43 and 44 are disposed above and below the upper support plate 42 as vibration isolating elastic members. The anti-vibration rubbers 43 and 44 and the upper support plate 42 are fixed by tightening a nut 46 via a washer 45 at the upper portion through the fixed shaft portion 33c on the cylinder 33b of the damper 33.
Thus, the water tank 27 in which the drum 30 is provided is supported by the front and rear dampers 33 and the anti-vibration rubbers 35, 36, 43, and 44 laminated thereon.

  Here, the anti-vibration rubbers 35, 36, 43, and 44 have a shape in which the contour has a linear portion parallel to a direction orthogonal to the direction of the vibration with respect to the vibration in the specific direction of the water tank 27. Specifically, in this case, as shown in FIG. 3 and FIG. 4 (a) in a plan view and in (b) as a longitudinal side view, portions A and B that are linear in the front, rear, left and right respectively. It is made into the square board shape which has.

  Therefore, it is also that the linear portions A before and after the respective contours of the anti-vibration rubbers 35, 36, 43, 44 are parallel to the axial direction of the drum 30, and the anti-vibration rubbers 35, 36, 43 , 44 are linear directions A, B on the front, rear, left, and right sides of the respective contours of the water tank 27 with respect to vibrations in a plurality of specific directions (in this case, the front and rear directions and the left and right directions). It is also forming a straight line in parallel.

  The anti-vibration rubbers 35 and 44 have holes 35a and 44a through which the movable rod 33a of the damper 33 and the fixed shaft portion 33c penetrate, respectively, and convex portions 35b and 44b. 36 and 43 have holes 36a and 43a through which the movable rod 33a and the fixed shaft portion 33c of the damper 33 penetrate, respectively, at the center, and the convex portions 35b and 44b of the vibration-proof rubbers 35 and 44, respectively. It has the recessed parts 36b and 43b to fit.

  Further, the anti-vibration rubbers 35, 36, 43, 44 exist on both the upper and lower sides of the damper 33, and both of the anti-vibration rubber 35 and the anti-vibration rubber 44, and the anti-vibration rubber 36 and the anti-vibration rubber 43 respectively. It has a symmetrical shape.

Next, the operation of the above configuration will be described.
When the water tank 27 vibrates, a damping force is effectively obtained by the damper 33 against the vibration of the water tank 27 along the axial direction of the movable rod 33a of the damper 33.
And when the water tank 27 vibrates and tilts, it will come to show in FIG. In addition, this FIG. 5 has shown the state in which the water tank inclined as a state inclined in the left lower direction in the figure. When the water tank 27 is tilted, the anti-vibration rubbers 35, 36, 43, and 44 generate a reaction force that is proportional or inversely proportional to the distance from the axis of the water tank 27, and this acts as a damping force against the inclination of the water tank 27. .

  Since the conventional anti-vibration elastic members (anti-vibration rubbers 2, 3, 11, and 12 shown in FIGS. 14 and 15) are all disk-shaped, the distance from the axis of the water tank 27 is along the arc. Differently, the reaction force obtained is different accordingly. As an example, in the inclination of the water tank shown in FIG. 16, the distance is reduced from the largest part of the distance from the axis of the water tank 27 by the anti-vibration rubbers 11 and 3 as indicated by the arrow P in FIG. As a result, the reaction force P gradually decreases. On the other hand, as indicated by the arrow P in FIG. 18, the distance from the smallest portion from the axis of the aquarium is reduced. As the value increases, the reaction force P gradually decreases. For this reason, as described above, the conventional system has not sufficiently obtained a damping force with respect to the inclination of the water tank.

  On the other hand, as described above, the anti-vibration rubbers 35, 36, 43, 44 are linear in parallel to the direction perpendicular to the direction of the vibration of the water tank 27 in a specific direction. As shown in FIGS. 6 and 7, in the shape having the formed portion, there are many portions where the vibration isolating rubber 35, 36, 43, 44 has a large distance from the axis of the water tank 27, which generates a large reaction force P. Accordingly, a large reaction force P is generated as a whole, and a sufficient damping force against the inclination of the water tank 27 can be obtained.

  Note that the inclination when the water tank 27 vibrates is due to the centrifugal force of the laundry that is offset in the drum 30, and the rotation of the drum 30 at that time is clockwise or counterclockwise in FIG. This is mainly due to the occurrence of vibration in the front-rear direction (left-right direction in FIG. 1). Accordingly, the vibration in the specific direction of the water tank 27 in this case refers to the vibration in the front-rear direction, and the anti-vibration rubbers 35, 36, 43, 44 have their contours in the direction of vibration relative to the vibration in the front-rear direction of the water tank 27. It is assumed that it has a portion A that forms a straight line in parallel with the left-right direction, which is a direction perpendicular to the direction.

  That is, that is, the linear portions A of the contours of the anti-vibration rubbers 35, 36, 43, and 44 are parallel to the axial direction of the drum 30, and as a result, mainly as described above. It acts more effectively against the inclination of the water tank 27 due to the vibration in the direction in which it occurs, and thus a damping force with respect to the inclination of the water tank 27 can be obtained sufficiently and more effectively.

  In addition, in the case of this configuration, the anti-vibration rubbers 35, 36, 43, and 44 have a contour that is different from the vibrations of the water tank 27 in a plurality of specific directions (the front-rear direction and the left-right direction). Are formed in a shape having straight portions A and B in parallel with a direction orthogonal to each other, thereby effectively acting on the inclination of the water tank 27 due to vibrations in a plurality of specific directions, and thus the water tank. It is possible to sufficiently and effectively obtain the damping force with respect to the inclinations in the plurality of specific directions.

  Further, in the case of this configuration, the vibration isolating rubbers 35, 36, 43, 44 are present on both upper and lower sides of the damper 33, and both the vibration isolating rubbers 35, 44, 36, 43 are symmetrical. Thus, the above-described damping action with respect to the inclination of the water tank 27 can be obtained on both the upper and lower sides of the damper 33, so that the damping effect can be further enhanced. In addition, in this case, the same vibration-proof rubber 35, 36, 43, 44 can be used on both the upper and lower sides of the damper 33, so that it can be rationally configured.

  8 to 12 show the second to fourth examples (second to fourth embodiments) of the present invention. The same reference numerals are used for the same parts as in the first example. A description will be omitted, and only different parts will be described.

[Second Embodiment]
In the second embodiment shown in FIG. 8, in place of the above-described anti-vibration rubbers 35, 36, 43, 44, only the front and rear portions are linear, that is, only the linear portion A is provided, and the left and right portions are curved. The anti-vibration rubber 51 (which does not have the linear portion B) is used. The anti-vibration rubber 51 is shown as a representative of all of the anti-vibration rubbers 35, 36, 43, and 44, and all the planar shapes thereof are the same.

  By doing in this way, although it is not a plurality of specific directions, it works effectively with respect to the inclination of the water tank 27 due to the vibration in the front-rear direction which is one specific direction. A sufficient damping force can be obtained.

[Third embodiment]
In the third embodiment shown in FIG. 9, in place of the above-mentioned anti-vibration rubbers 35, 36, 43 and 44, the front and rear, left and right, and the portions A, B, An anti-vibration rubber 61 having an octagonal disk shape with C is used. The anti-vibration rubber 61 is also shown as a representative of all of the anti-vibration rubbers 35, 36, 43, and 44, and the entire planar shape is the same.

  By doing so, the anti-vibration rubber 51 is more effective against the inclination of the water tank 27 due to more vibrations in a specific direction than the anti-vibration rubbers 35, 36, 43, and 44 having the above-mentioned square disk shape. Therefore, the damping force with respect to the inclination of many specific directions of the water tank 27 can each be obtained sufficiently and effectively.

[Fourth embodiment]
In the fourth embodiment shown in FIGS. 10 to 12, the vibration-proof rubbers 71 to 74 having the planar shape of any one of the first to third embodiments (in this case, the first embodiment as an example) The lower support plate 34 and the upper support plate 42, which are supporting members, are normally in contact with the inner side of the straight portion A (B, C) side of the contour of the anti-vibration rubbers 71 to 74, and the contour of the anti-vibration rubber 71 In order to prevent contact on the linear portion A (B, C) side of each, a slope 75 is formed on each of the linear portion A (B, C) side portions of the anti-vibration rubber 71 (FIG. A representative example is shown in which the slope 75 is formed only on the linear portion A side portion of the anti-vibration rubber 71. As another example, there is a configuration in which the slope 75 is also formed on the linear portions B and C side portions. To do).

  By doing in this way, in the steady state where the water tank 27 hardly tilts, as shown in FIG. 10, the contact area between the anti-vibration rubbers 71 to 74 and the lower support plate 34 and the upper support plate 42 can be reduced. It is possible to reduce the vibration of the water tank 27 at a constant time from being transmitted to the floor surface through the contact portion between the anti-vibration rubbers 71 to 74 and the lower support plate 34 and the upper support plate 42. If the vibration of the water tank 27 is increased and the inclination is increased, the linear portions A (B, C) of the anti-vibration rubbers 71 to 74 become lower support plate 34 and upper support plate as shown in FIG. The above-mentioned effect is obtained by coming into contact with 42. Thus, the vibration and inclination of the water tank 27 can be reduced both when the water tank 27 is stationary and when it is resonant.

In this case as well, the anti-vibration rubbers 71 to 74 exist on both the upper and lower sides of the damper 33, and both the anti-vibration rubbers 71 to 74 have a symmetrical shape.
In addition, the anti-vibration elastic member exemplified as the anti-vibration rubber may be made of an elastic material other than rubber, such as plastic, etc., and the present invention is limited only to the embodiment described above and shown in the drawings. However, the present invention can be implemented with appropriate modifications within a range not departing from the gist.

Overall side view of the first embodiment of the present invention Enlarged longitudinal side view of the main part The figure which shows one anti-vibration rubber with an enlarged plan view (a) and an enlarged vertical side view (b) The figure which shows other vibration-proof rubber with an enlarged plan view (a) and an enlarged vertical side view (b) Expanded longitudinal side view for explaining the operation of the main part Enlarged perspective view for explaining the action of one anti-vibration rubber Enlarged perspective view for explaining the action of other anti-vibration rubber FIG. 3 (a) equivalent view showing the second embodiment of the present invention. FIG. 3 (a) equivalent view showing a third embodiment of the present invention. FIG. 2 equivalent diagram showing a fourth embodiment of the present invention. Expanded perspective view of anti-vibration rubber Figure equivalent to FIG. FIG. 2 equivalent diagram showing a conventional example 3 equivalent figure 4 equivalent diagram Figure equivalent to FIG. 6 equivalent diagram 7 equivalent diagram

Explanation of symbols

  In the drawing, 27 is a water tank, 30 is a drum, 33 is a damper, 34 is a lower support plate (support member), 35 and 36 are anti-vibration rubbers (vibration-proof elastic members), 42 is an upper support plate (support member), 43 , 44, 51, 61, 71 to 74 are vibration-proof rubbers (vibration-proof elastic members).

Claims (5)

In the case where the water tank in which the drum is installed is supported by the damper and the vibration-proof elastic member laminated thereon,
The drum-type laundry characterized in that the anti-vibration elastic member has a shape in which a contour forms a straight line parallel to a direction orthogonal to the direction of vibration with respect to vibration in a specific direction of the water tank. Machine.   2. The drum type washing machine according to claim 1, wherein the linear portion of the contour of the vibration-proof elastic member is parallel to the axial direction of the drum.   The anti-vibration elastic member has a shape in which the contour has a portion that forms a straight line parallel to a direction orthogonal to the direction of each vibration with respect to vibrations in a plurality of specific directions of the water tank. Item 2. A drum-type washing machine according to Item 1.   The anti-vibration elastic member and the support member facing the anti-vibration elastic member are normally in contact with each other on the inner side of the linear part side of the anti-vibration elastic member outline, and are not in contact with each other on the linear part side of the anti-vibration elastic member outline. The drum type washing machine according to claim 1. The drum type washing machine according to any one of claims 1 to 4, wherein the vibration isolating elastic members exist on both upper and lower sides of the damper, and both of the vibration isolating elastic members have a symmetrical shape.

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