KR101302337B1 - Washing machine - Google Patents

Abstract

In the suspension for vibration-supporting the water tank, a water tank having a washing tank rotatably provided therein is provided by a friction damper means that always exhibits a damping effect in addition to the fluid damper means and stabilizes the damping force. A washing machine having a suspension for dust-proof support therein, the suspension comprising a fluid damper means and a friction damper means, wherein the fluid damper means uses the viscosity of a functional fluid whose viscosity is changed by the application of electrical energy to prevent vibration of the water tank. The friction damper means is characterized in that the vibration damping of the tank using the friction force generated by sliding contact with the shaft reciprocating in response to the vibration of the tank.

Description

Washing machine {WASHING MACHINE}

Embodiment of this invention relates to the washing machine which dust-proof supported the water tank by the suspension.

Conventionally, for example, in a drum type washing machine, a water tank having a drum rotatable therein is elastically supported at the bottom of the housing body by a plurality of suspensions, and reduces vibrations accompanying the rotation of the drum by the plurality of suspensions. It has a damping function.

As the suspension, for example, a magnetic viscous fluid (MR fluid) whose viscosity changes in accordance with the strength of a magnetic field is known (for example, refer to Patent Document 1).

The magnetic viscous fluid is employed as a suspension of a washing machine in that the viscosity of the fluid can be controlled by applying a magnetic field by a magnetic field generating circuit, and the magnetic viscous fluid is brought into contact with a shaft that moves up and down (reciprocating) according to the vibration of the tank. It is made to function as a resistance which suppresses the up-down movement of a shaft by viscosity, and to damp the vibration amplitude of a tank.

By the damping action (damper action), it is possible to quickly damp the vibration during operation and to provide a washing machine with low vibration and low noise.

Japanese Laid-Open Patent Publication No. 2006-57766

By the way, in the suspension which consists of the so-called fluid damper means using only the above-mentioned magnetic viscous fluid, it is not easy to variably control the viscosity appropriate to the magnitude of the vibration amplitude.

In addition, when the magnetic field generating circuit or the like becomes incapable of energizing, the damping action is very small, and thus has an instability factor such as abnormal vibration.

Thus, a washing machine having a friction damper means that always exhibits a damping action in addition to the fluid damper means and providing a stabilizing damping force is provided.

According to the washing machine of this embodiment, the washing machine provided with the suspension which dust-proof-supports the water tank in which the rotating washing tank was installed in the housing body, WHEREIN: The suspension is provided with the fluid damper means and the friction damper means, The said fluid damper means Has a shaft reciprocating in a cylindrical cylinder according to the vibration of the water tank, and a functional fluid accommodated in the cylinder and whose viscosity is changed by application of electrical energy, and the viscosity of the functional fluid reciprocates in the shaft. And a friction damper means arranged in series through the fluid damper means and the shaft to generate frictional force by sliding contact with the reciprocating motion of the shaft during vibration. The friction force is the reciprocation of the shaft It has a structure which attenuates the vibration of the said tank by functioning to resist copper, It is characterized by the above-mentioned.

1 is an enlarged longitudinal sectional view showing a part of a suspension in a first embodiment;
2 is a longitudinal sectional view showing the structure of a suspension unit;
3 is a longitudinal sectional view showing an outline of a washing machine overall structure applied to a drum type washing machine;
4 is a diagram corresponding to FIG. 1 showing a second embodiment.

(1st embodiment)

EMBODIMENT OF THE INVENTION Hereinafter, 1st Embodiment applied to the drum type washing machine is demonstrated with reference to FIGS.

First, the overall structure of the drum type washing machine (hereinafter referred to as a washing machine) shown in FIG. 3 will be described. The door 3 which forms the laundry entrance 2 and opens and closes the entrance 2 is provided in the substantially center part of the front surface part (right side in illustration) of the box-shaped housing 1 which forms an outer shell.

Moreover, the operation panel 4 is provided in the upper part of the front surface part of the housing body 1, and the control apparatus 5 for operation control is provided in the back surface side.

The water tank 6 is provided inside the housing body 1. The water tank 6 forms a transverse cylindrical shape with the axial direction back and forth, and on the left and right pairs of suspensions (only one shown) on the bottom plate 1a of the housing body 1 (details will be described later). It is elastically supported in the state inclined so that it may go forward.

The motor 8 is attached to the back part of the water tank 6. The motor 8 is made of, for example, a brushless motor of direct current, and is of an outer rotor type. A rotating shaft (not shown) attached to the center of the rotor 8a is connected to the water tank 6 through a bearing bracket 9. It is inserted through the inside and is connected to the center part of the back part of the drum 10 mentioned later.

The drum 10 is installed inside the water tank 6, and functions as a washing tank for accommodating laundry, and forms a horizontal cylindrical shape having its axial direction back and forth, and is connected to the rotating shaft of the motor 8 as described above. 6) is supported in an inclined state to ascend forward coaxially.

As a result, the drum 10 is directly driven by the motor 8 to rotate around the horizontal axis, and the motor 8 functions as a drum drive device for rotating the drum 10.

In addition, a large number of small holes 11 for water passage and ventilation are formed in the circumferential side portion (body part) of the drum 10, whereas the water tank 6 has a shape that is almost free of holes and is capable of storing water. have.

These drums 10 and the water tank 6 both have openings 12 and 13 in the front face portion, and an annular bellows 14 between the opening 13 and the laundry entrance 2 of the water tank 6 therein. ) Is installed.

As a result, the laundry entrance 2 is connected to the inside of the drum 10 through the bellows 14, the opening 13 of the water tank 6, and the opening 12 of the drum 10.

The drain pipe 16 is connected to the lowest part of the water storage tank 6 via the drain valve 15 on the way, and drainage is possible out of the washing machine. The drying unit 17 is provided from the back side of the said water tank 6 up and forward.

The drying unit 17 is composed of a circulation duct 18 including a blower 19, a heating device 20, a dehumidification means (not shown), and the like, and the moisture in the air discharged from the water tank 6 is provided. It dehumidifies, then heats, produces | generates what is called a dry wind, and performs the circulation which repeats returning in the water tank 6, and it is made to dry the laundry in the drum 10 which is rotationally driven.

Here, the specific structure of the above-mentioned suspension 7 is demonstrated. In addition to FIG. 3, it demonstrates with reference to the longitudinal cross-sectional view which shows the structure of the suspension 7 single body of FIG.

The suspension 7 is, as a schematic configuration, a cylindrical cylinder 22 attached to the mounting plate 21 side of the bottom plate 1a of the housing body 1, and an attachment plate 23 provided by the water tank 6. The shaft 24 attached to the) side and the coil spring 25 attached between the shaft 24 and the cylinder 22 are comprised.

In the concrete attachment structure of the suspension 7, a cylinder connecting portion 22a is attached to the lower end of the cylinder 22, and the connecting portion 22a is attached to the attaching plate 21 of the bottom plate 1a such as rubber seat plate 26. The cylinder 22 is attached to the mounting plate 21 on the side of the bottom plate 1a by fastening with the nut 27 through the or the like.

On the other hand, the shaft 24 is a shaft composed of a shaft main part 24a made of a magnetic member inserted into the inside of the cylinder 22 (details will be described later), and a magnetic member integrally connected to an upper end thereof. The shaft 24 is comprised by the connection part 24b, and the said shaft connection part 24b is fastened to the attachment plate 23 of the water tank 6 with the nut 29 through the elastic seat plate 28, such as rubber | gum, and the like. In accordance with the vibration of the water tank 6, it becomes the connection structure which makes it vibrate integrally in the up-down direction etc.

In addition, the details of the attachment structure of the coil spring 25 will be described later, and only an outline will be described here. As shown in FIG. 2, the lower end of the coil spring 25 is supported by the upper end of the cylinder 22. The upper end portion is blocked by the disc-shaped spring receiving plate 30 disposed above the shaft 24, and is mounted in a state where an elastic force is accumulated.

That is, the coil spring 25 is provided in a state in which a force is applied to pull the shaft 24 upward from the cylinder 22, that is, outward of the cylinder 22.

Next, the outline structure of the cylinder 22 is demonstrated with reference to the expanded sectional drawing of FIG.

In the cylinder 22, bearing means for supporting the shaft 24 in a linear reciprocating motion (up and down movement) is fixedly installed apart from each other in the upper part and the lower part, and is described later in the intermediate portion of the bearing means which is separated from the lower part. It has the structure which accommodated the functional fluid 36, the coil bobbin unit 37, etc. which function as a magnetic field generating means.

By the way, first, the bearing means provided on the upper side will be described. A hollow cylindrical upper bearing case 31 is attached to the opening upper end of the cylinder 22 by press-fitting or caulking means, and the inside of the upper bearing case 31. The bearing 32 made of, for example, a sintered-containing metal is fitted in the press-fitted state, and the upper half side of the shaft 24 is axially supported in a sliding contact manner.

Moreover, although the spring receiving part 48 which protruded integrally and provided in the upper part of the upper bearing case 31 is provided, this detail is mentioned later.

Correspondingly, when the bearing means arranged on the lower side is described (see Fig. 2), the lower bearing means is located almost in the middle of the up and down direction of the cylinder 22, and the hollow cylindrical lower bearing case 33 is It is fixedly attached by press-in or caulking means.

In the hollow interior of the bearing case 33, a bearing 32 made of the same sintered-containing metal as described above is fitted and fixed in a press-fit state.

As a result, the shaft 24 inserted and inserted into the cylinder 22 by the bearing means located in the upper end part and the middle part (lower part) of the cylinder 22 is linearly supported by the reciprocating motion in the vertical direction.

However, as described above, in the state in which the coil spring 25 is installed, the shaft 24 is in a state where a force is applied upward (outward), so that the fixing ring 34 provided at the lower end of the shaft 24 has a lower bearing. It collides with the case 33, ie, the shaft 24 is accommodated in the fall prevention state upward.

In the cylinder 22 positioned below the lower bearing case 33, a cavity 35 having a size in consideration of the downward stroke of the shaft 22 is formed.

Here, the structure of the functional fluid 36 accommodated between the upper and lower bearing cases 31 and 33, and the coil bobbin unit 37 which functions as a magnetic field generating means etc. is demonstrated.

First, when the structure of the coil bobbin unit 37 is demonstrated, the coil bobbin unit 37 winds the coil 39 which generate | occur | produces a magnetic field (magnetic field) in the cylindrical bobbin 38, for example this embodiment In this case, the upper coil 39a and the lower coil 39b are wound up and down in two stages.

In this way, the resin mold (molding part 47) is integrally formed in the state in which the yokes 40, 42, and 41 are disposed so as to be positioned above, below, and in the middle of the bobbin 38 on which the coil 39 is wound. The coil bobbin unit 37 is configured.

The outer circumferential surface side of the mold portion 47 of the coil bobbin unit 37 is fitted to the inner circumferential surface of the cylinder 22 to be installed and accommodated in the cylinder 22.

Moreover, the cylindrical hollow part of the installed coil bobbin unit 37 forms an annular narrow space | gap G between the outer peripheral surface of the inserted shaft 24. As shown in FIG.

In addition, an annular fluid seal 43 is fixed to the upper surface side of the upper yoke 40 positioned at the upper end of the coil bobbin unit 37 by press-fitting the rigid portion around the outer circumference thereof. The outer peripheral surface of the shaft 24 is in close contact and sealed.

Further, the same fluid seal 43 is press-fitted to the lower surface side of the lower yoke 41 located at the lower end, and is in close contact with the outer circumferential surface of the shaft 24 to be sealed.

Thus, the gap G has its upper and lower ends sealed with each fluid seal 43 to form a generally cylindrical space, and each fluid seal 43 is outwardly to the upper and lower bearing cases 31 and 33, respectively. It is supported so that it may be fitted from the side, and it is attached in the state of preventing the fall.

In addition, as shown in FIG. 2, the bushes drawn out from the upper and lower coils 39a and 39b connected in series using the intermediate yoke 42, or the lead wires 44 are deposited on the cylinder 22, respectively. Through 45), it is led to the outside and connected to the drive circuit which is not shown in figure.

The lead wire 44 is covered with a tube 46 for protection.

The functional fluid 36 (shown in white in Figs. 1 and 2) is filled in the space G of the above configuration. In addition, although the space | gap G formed between the shaft 24 and the coil bobbin unit 37 is a space formed in a cylindrical shape, especially the clearance gap corresponding with each yoke 40, 41, 42 is formed narrowest, In addition, the fluid seal 43 disposed in the upper and lower portions has a sealing structure in which the functional fluid 36 does not leak.

Here, the characteristic etc. of the functional fluid 36 are demonstrated. The functional fluid 36 is a fluid in which rheology properties such as viscosity are functionally changed by controlling a physical quantity applied from the outside. Specifically, the fluid 36 is a fluid whose viscosity is changed by the application of electrical energy. Examples thereof include magnetic viscous fluids (MR fluids) whose viscous characteristics change with the strength of magnetic fields (magnetic fields), or electric viscous fluids (ER fluids) whose viscous properties change with the strength of electric fields (electric fields).

Among them, the former magnetic viscous fluid (MR fluid) is obtained by dispersing ferromagnetic particles such as iron and carbonyl iron in oil, for example, and when a magnetic field is applied, the ferromagnetic particles form chain clusters, resulting in an increase in apparent viscosity. It has the characteristic to Hereinafter, in this embodiment, the operation | movement description etc. in the case where the said magnetic viscous fluid is employ | adopted as the functional fluid 36 is given.

The coil bobbin unit 37 of the magnetic field generating means for generating a magnetic field corresponding to the current value flowing through the coil 39 through the lead wire 44 makes it possible to control the viscosity of the magnetic viscous fluid which is the functional fluid 36.

Since the generated magnetic field varies depending on the direct current value, the viscosity of the magnetic viscous fluid can be easily controlled.

Next, the attachment structure of the lower end part of the coil spring 25 which was outlined previously is demonstrated in detail.

That is, as shown in FIG. 1 and FIG. 2, in the present embodiment, the spring bearing part 48 integrally protruded from the upper surface side is formed by using the upper bearing case 31 located at the upper end of the cylinder 22. I install it.

The spring receiving part 48 has a cylindrical part 48a which forms a cylindrical shape with a small diameter. Therefore, the spring receiving portion 48 is formed at a position protruding from the upper end of the cylinder 22.

Step portions 49 having different diameters are formed at the boundary between the base portion of the tubular portion 48a and the upper bearing case 31, and the lower portion of the coil spring 25 is formed by the step portions 49. Support from below.

Here, the coil spring 25 is fitted so that the lower end part of the coil spring 25 does not freely move with respect to the outer peripheral base of the cylindrical part 48a of the spring receiving part 48, and the cylindrical part 48a The lower end of the coil spring 25 is reliably supported in a form that is loosely fitted, that is, fits loosely as the top is moved.

In addition, the form in which the coil spring 25 is suitably fitted to the cylindrical part 48a can also make the cylindrical part 48a into a taper shape with a narrow end, or the internal diameter of the coil spring 25 is gradually made. The shape may be enlarged.

In addition, the length (height dimension) of the cylindrical part 48a is set so that it may become smaller than the close_contact | adherence length of the coil spring 25. FIG. This is for the upper end of the cylindrical portion 48a to effectively function up to the maximum compression state of the coil spring 25 without being in contact with the spring receiving plate 30.

In addition, as shown in FIG. 1, the inner portion of the spring receiving portion 48 forms a circular inner circumference having a larger diameter than the shaft 24 through which the center is inserted, and the length (height) of the cylindrical portion 48a. The recessed part 50 which has a considerable depth is formed.

In the concave portion 50, the sealing members 51 of two annular portions from above are fitted by press-fitting and are arranged in a state facing each other up and down, and an annular gap between them facing each other. The groove-shaped part 52 which consists of these is formed.

Each seal member 51 is a spring built-in oil seal, and is provided with a plurality of sets of lip 51a, 51b, for example, and the inner lip 51a has a shaft (via a spring 51c). 24), in particular, it functions as a seal lip. In addition, the outer lip 51b mainly functions as a dust lip to prevent dust intrusion, but all of the outer lip 51b is in close contact with the shaft 24 inserted therein and has a function of sealing liquid tightly.

The groove-shaped portion 52 is formed around the shaft 24 by the respective inner ribs 51a facing each other from top to bottom, and the shaft 24 side, which is its tip side (center side), has a predetermined width ( The open gap of the up and down direction is formed.

In the present embodiment, the groove-shaped portion 52 is filled with a semisolid grease 53 (shown by broken line hatching in FIG. 1). Therefore, the groove-shaped portion 52 functions as a grease reservoir, and the grease 53 is in surface contact with the outer circumferential surface of the shaft 24 at all times with a predetermined width.

In addition, the hardness of the semi-solid grease 53 refers to the roughness of JIS (Japanese Industrial Standards) No. 0 to No. 3 (term meaning hardness, softness, fluidity, etc. of a paste-like substance). The urea grease which has is employ | adopted.

In this way, the suspension 7 is comprised by the said structure, and the suspension 7 enters between the water tank 6 and the bottom plate 1a of the housing body 1 by a pair of right and left, and the bottom plate of the housing body 1 ( It is the structure which elastically supports the water tank 6 on 1a).

Next, the operation of the washing machine of the above configuration will be described.

In the washing machine provided with the drum 10 around the horizontal axis of this embodiment, operation is performed by the control apparatus 5 driving control of the drum 10 by appropriate rotational speed in each stroke of washing | cleaning, rinsing, dehydration, and drying. .

The drum 10 is vibrated due to the unloading load by laundry contained in the drum 10 and the water tank 6 elastically supported is mainly vibrated in the vertical direction.

In response to the vertical vibration of the water tank 6, the suspension 7 expands and contracts the coil spring 25 via the shaft 24 integrally connected to the water tank 6, and the shaft 24 is a cylinder 22. It vibrates up and down in a vertical direction.

The coil spring 25 absorbs vibrations by its stretching action, and effectively prevents vibration transmission to the housing body 1 (base plate 1a) side.

On the other hand, in the cylinder 22, the functional fluid 36 (here, a magnetic viscous fluid) is formed in the space G formed between the hollow portion of the cylindrical coil bobbin unit 37 and the outer circumferential surface of the shaft 24. Since it is filled, the viscosity of the functional fluid 36 functions as a frictional resistance to the reciprocating motion of the shaft 24 in the vertical direction, and serves to quickly damp the vibration amplitude of the water tank 6.

In addition, during the operation of rotationally driving the drum 10, the coil 39 is energized to generate a magnetic field. As a result, a magnetic path is formed around each of the coils 39a and 39b arranged in two upper and lower stages, and among them, the space G between each of the yokes 40, 41, 42 and the shaft 24 having a high magnetic flux density, among others. ) Is a narrow gap.

Therefore, when a magnetic field is applied to the functional fluid 36, the viscosity of the magnetic viscous fluid in this region is rapidly increased, and the frictional resistance to the reciprocating motion of the shaft 24 in the vertical direction is increased, and as a result, the water tank ( The vibration amplitude of 6) can be attenuated quickly.

Thus, the bobbin coil unit 37 which integrated the bobbin 38, the coil 39, the yokes 40, 41, 42, etc. functions as a magnetic field generating means.

The so-called fluid damper means according to the present embodiment, wherein the functional fluid 36 subjected to the magnetic field by the magnetic field generating means increases its viscosity to function as a resistance to the reciprocating motion of the shaft 24 to obtain a damping action of vibration. In particular, it exhibits an effective damping effect against large vibration amplitudes generated during dewatering operation in which the drum 10 rotates at high speed.

On the other hand, the cylindrical part 48a of the spring receiving part 48 is utilized, and the semi-solid grease 53 of the hardness corresponded to the high viscosity accommodated in the hollow inside is normally in contact with the shaft 24. Therefore, a predetermined frictional force is obtained in accordance with the reciprocation of the shaft 24, and functions as a so-called friction damper means in the present embodiment, which serves to attenuate the vibration of the water tank 6 through the shaft 24.

Accordingly, the friction damper means is suitable for always exerting a substantially constant mechanical friction force without substantially changing the fluid damper means. In addition, the frictional force in this case strictly prevents the leakage of the grease 53 and the contact pressure to the shaft 24 by the lip 51a or the lip 51b, which functions as a reservoir of the grease 53, is assisted as the frictional force. In this embodiment, the friction action caused by the grease 53 is mainly described.

Moreover, although the spring receiving part 48 is utilized in order to comprise a friction damper means, the cylindrical part 48a is effective in preventing the large fall of a coil spring 25, or buckling.

The cylindrical portion 48a is located outward (upper) from the upper end of the cylinder 22, so that the seal member 51 and the grease 53 are located outside the cylinder 22, but the outer periphery of the cylindrical portion 48a. The fluid damper means is provided to install the damper means in that the friction spring means 25 can be configured to overlap (wrap) with a part of the effective length originally required. The problem that the whole length of the suspension 7 to be made longer is made longer, etc. does not arise.

The vibration damping means of the washing machine includes a fluid damper means using the functional fluid 36 and a friction damper means using the grease 53 having a semi-solid hardness, and also includes a dustproof action of the coil spring 25. It functions effectively as).

Among them, as the friction damper means can always exhibit and ensure a constant damping action (damper action) as described above, stabilization of the damping action by the suspension 7 can be expected.

In addition, even in the case where the fluid damper means mainly used by the suspension 7 does not function effectively, for example, inability to conduct electricity due to failure of the bobbin coil unit 37, or does not immediately respond to vibration, at least, Since the damping action by the friction damper means functions effectively, it contributes to the safety and stabilization against vibration as the suspension 7 of the washing machine.

As explained above, according to the washing machine shown in 1st Embodiment, in the suspension 7 which dust-proof-supports the water tank 6 which has the rotating drum 10 inside, the suspension 7 is a fluid damper means and a friction damper means. It is set as the configuration provided.

The fluid damper means includes a shaft 24 reciprocating in the cylindrical cylinder 22 according to the vibration of the water tank 6, and a functional fluid contained in the cylinder 22 and whose viscosity is changed by the application of electrical energy. (36) (magnetic viscous fluid in this embodiment), and the viscosity of the functional fluid 36 to function to resist the reciprocating motion of the shaft 24, it was configured to attenuate the vibration of the water tank (6).

The friction damper means, on the other hand, is arranged in series with the fluid damper means through the shaft 24 and in sliding contact with the reciprocating motion of the shaft 24 to generate a frictional force, and the frictional force resists the reciprocating motion of the shaft 24. It was set as the structure which damps the vibration of the water tank 6 by functioning.

According to the suspension 7 of such a structure, the vibration of the water tank 6 can be attenuated quickly by the fluid damper means of a main body, and the washing machine of low vibration and low noise can be provided. For example, since the viscosity of the functional fluid 36 can be variably controlled, appropriate damping control, such as control suited to the magnitude of the vibration amplitude and control for each stroke of the drum type washing machine, can be performed.

In addition to the fluid damper means, it is provided with a friction damper means which functions auxiliary, and always obtains a damping action by a substantially constant friction force, as a result, it is possible to stabilize the damping action by the suspension (7).

In addition, even when the fluid damper means of the main body does not function properly due to any factor, practical effects such as the damping action by the minimum friction damper means can be obtained and the abnormal vibration and the abnormal operation can be avoided can be expected. Can be.

The suspension 7 also has a coil spring 25 that exerts a force in the direction in which the shaft 24 is pulled outward from the cylinder 22, and the coil spring 35 is applied to the vibration generated on the water tank 6 side. The expansion and contraction prevents vibration from being transmitted to the housing body 1 side.

The friction damper means was located in the outer end portion of the cylinder 22 supporting one end of the coil spring 25, and was disposed in a range surrounded by the coil spring 25. That is, since the friction damper means is in the range of the effective length required as the coil spring 25, and installed in the position which overlaps with a part of the coil spring 25, the friction damper means does not enlarge (long) the suspension 7 which has a fluid damper means. Friction damper means can be added, which is advantageous in fabrication and assembly.

More specifically, the cylindrical spring receiving part 48 which fits and supports the one end of the coil spring 25 in the outer end part of the cylinder 22 is provided, and the cylindrical shape which is the cylindrical length of the spring receiving part 48 is provided. The portion 48a was formed to be smaller than the close contact length of the coil spring 25.

Thereby, the upper end of the cylindrical part 48a can be expanded and contracted so that it may not contact with the spring receiving plate 30, and this is effective for dust-proofing to the maximum compression state of the coil spring 25 for the coil spring 25. Can function.

In addition, although the spring receiving part 48 is provided in the present embodiment by integral molding with the upper bearing case 31, manufacture and assembly are easy, You may make it an assembly structure with a separate member.

And the frictional force by the friction damper means was set as the structure obtained by the two sealing members 51 and the semisolid grease 53 of sliding contact with the shaft 24. As shown in FIG.

Therefore, it is possible to suppress the occurrence of a large friction sound and an unpleasant friction sound, and to achieve the silence of the suspension 7 together with the fluid damper means. As grease 53, the roughness which shows the hardness was favorable for obtaining the desired damping effect of urea grease to JIS classification No. 0-3.

In addition, in this embodiment, the two sealing members 51 are arrange | positioned facing each other up and down as grease storage part, and the groove-shaped part 52 opened to the shaft 24 side between them is formed annularly, The grease 53 is filled in the groove portion 52.

The filled grease 53 is held reliably without leaking to the outside by the seal members 51 disposed up and down, and can be brought into sliding contact with the shaft 24 to exert a constant frictional force for a long time.

In this case, the fluid seal 43 used for the fluid damper means can also be used. For example, especially as shown in FIG. 1, the fluid seal 43 arrange | positioned at the upper part of the upper yoke 40 prevents the leakage of the functional fluid 36 from below to upward.

Therefore, it is good also as a structure which employ | adopted the sealing member 51 of the upper part (outer side) by supposing that the fluid seal 43 is substituted by the sealing member 51 of the lower side.

In this configuration, a grease reservoir is formed between the upper seal member 51 and the bearing 32. Even if the grease 53 leaks from the bearing 32 downward, for example, the fluid seal 43 is secured. Can be sealed.

In addition, in this embodiment, although the bearing 32 is provided in the inner side (lower side) of the sealing member 51, you may arrange | position it to the outer side (upper side) of the sealing member 51. As shown in FIG. In this case, in place of the one sealing member 51 on the lower side, the fluid seal 43 disposed on the upper side is adopted, and there is an advantage in that a grease storage part can be easily formed by an appropriate space therebetween.

In addition, in this embodiment, although it applied and demonstrated to the drum type washing machine, it is not limited to this, For example, it has the washing tank which combined the dehydration tank which can be rotated around a vertical axis | shaft, and is what is called the thing provided with the tubular tank with a bottom in the vertical axis | shaft. It is also applicable to vertical washing machines.

Moreover, since the suspension 7 attached the shaft 24 side to the water tank 6, and the cylinder 22 side was provided in the housing body 1 side, it is in the cylinder 22 side which leads the lead wire 44. It is advantageous in that the vibration generated can be suppressed, but it is also possible to set the cylinder 22 side to the reverse arrangement attaching to the water tank 6, and the cylinder 22 and the shaft 24 are relatively reciprocated. Good to be there.

(Second Embodiment)

4 is a diagram corresponding to FIG. 1 showing the second embodiment, and in the second embodiment, the semi-solid grease 53 is used as the friction damper means in the second embodiment. The point which used the elastic elastic friction body 54 of a solid form differs, and it is set as a substantially common structure other than that.

Hereinafter, the same code | symbol is attached | subjected to the same part as 1st Embodiment, description is abbreviate | omitted, and a different point is demonstrated.

That is, as shown in FIG. 4, the cylindrical elastic friction body 54 is provided in the inner side of the cylindrical part 48a of the spring receiving part 48 so that sliding contact with the shaft 24 may be carried out. . As the elastic friction body 54, for example, a urethane-like elastomer having self-lubricating property (abrasion resistance) and high elasticity, or a friction member such as a felt having excellent wear resistance and elasticity is preferable.

In addition, a member from which a desired frictional force may be obtained may be employed. For example, a spring built-in oil seal described as the seal member 51 described in the first embodiment may also be employed. In this case, adjustment of the elastic force by the spring 51c or sliding is possible. It is possible to obtain an appropriate frictional force against the shaft 24 by adjusting by a plurality of lip in contact.

Thus, since the frictional damper means which functions as an auxiliary function is provided with the elastic elastic friction body 54 of a solid form, and the stable constant friction force is always obtained, the damping effect | action by the suspension 7 can be stabilized, and fluid Even when the damper means does not function properly due to any factor, the same effect as that of the first embodiment can be expected, such as a damping action by the minimum elastic friction body 54 is obtained.

In addition, although the embodiment which used the frictional resistance between the shaft 24 and the functional fluid 36 was illustrated as the suspension 7, it is not limited to this, For example, it is a some orifice hole with respect to the functional fluid filled in the cylinder. The piston valve may be configured to reciprocate according to the vibration and to control the viscosity of the functional fluid passing through the orifice hole, that is, to the vibration of the tank using the functional fluid whose viscosity is changed by the application of electrical energy. Therefore, the suspension mechanism which attenuates the vibration of a tank by functioning to exert a resistive force with respect to the reciprocating shaft may be sufficient.

As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intended to limit the scope of invention. These novel embodiments may be embodied in various other forms, and various omissions, substitutions, and changes can be made without departing from the spirit of the inventions. These embodiments and their modifications are included in the scope and spirit of the invention and are included in the invention and equivalent scope of the claims.

1: housing body 6: water tank
7: suspension 10: drum (washing tank)
22: cylinder 24: shaft
25: coil spring 36: functional fluid (fluid damper means)
37: coil bobbin unit (magnetic field generating means)
39: coil 43: fluid seal
48: spring receiving part 48a: cylindrical part
51: seal member 52: groove shape (greek reservoir)
53: grease (friction damper means) 54: elastic friction body (friction damper means)

Claims (8)

In the washing machine provided with the suspension which dust-proof-supports the water tank which installed the washing tub which was rotatable inside, in a housing body,
The suspension comprises a fluid damper means and a friction damper means,
The fluid damper means for sealing the upper and lower portions of the shaft reciprocating in the cylindrical cylinder in accordance with the vibration of the water tank, the coil bobbin unit disposed on the outer peripheral surface of the shaft in the cylinder, and the coil bobbin unit A functional fluid in which iron particles are dispersed in oil filled in an annular void formed between the fluid seal and the outer peripheral surface of the shaft, wherein the functional fluid is energized by energizing a coil of the coil bobbin unit. Is applied to the functional fluid to change the viscosity of the functional fluid, and the viscosity of the functional fluid functions to resist reciprocating motion of the shaft, thereby damping vibration of the tank,
The friction damper means always maintains a mechanical constant frictional force, is arranged in series through the shaft and the fluid seal of the fluid damper means, and generates frictional force by sliding contact with the reciprocating motion of the shaft during vibration, the frictional force The washing machine characterized by the structure which attenuates the vibration of the said tank by functioning to resist the reciprocating motion of the said shaft. The method of claim 1,
The suspension has a coil spring for applying a force in a direction in which the shaft is drawn outwardly from the cylinder, and the friction damper means has an outer end portion of the cylinder supporting one end of the coil spring. Washing machine, characterized in that arranged in the range surrounding. 3. The method of claim 2,
And a tubular spring receiver for fitting and supporting one end of the coil spring to an outer end of the cylinder, wherein the tubular length of the spring receiver is smaller than the close contact length of the coil spring. The method of claim 1,
The friction force by the friction damper means is a washing machine, characterized in that the configuration is generated by a cylindrical elastic friction member sliding contact with the shaft. The method of claim 1,
And the frictional force by the friction damper means is generated by grease in sliding contact with the shaft. delete The method of claim 5, wherein
And a seal member facing each other above and below the shaft reciprocating in the cylinder, and filled with the grease reservoir formed between the seal member and the shaft outer circumferential surface. The method according to claim 5 or 7,
The grease is a urea-based grease of No. 0 to No. 3 roughness according to Japanese Industrial Standard classification.

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