JPH10216393A - Drum-type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce oscillation transfer force to a floor surface by improving an anti-oscillation bearing mechanism. SOLUTION: In a washing machine body 1, a tank 11, a spinning teel 13 controlled freely rotatably around the axis of a horizontally rotational shaft 49 by a driving motor 51 in the tank 11 and an anti-oscillation bearing mechanism 17 are provided. The anti-oscillation bearing mechanism 17 has an anti- oscillation bearing mechanism body 23, and on one side of it, an attenuating bearing part 25 is supported on the tank fixing side, to absorb horizontal oscillation perpendicular to the axis of the rotational shaft 49, and on the other side, an attenuating bearing part 27 is supported on the base plate fixing part side to absorb horizontal oscillation perpendicular to the axis of the rotational shaft 49. The attenuation power of the attenuating bearing part 27 on the base plate side is made smaller than that of the attenuating bearing part 25 on the tank fixing side to decrease the around-axis dynamic moment load in the longitudinal directions which is generated by the oscillation component in the horizontal direction to work as an oscillation increasing force in the vertical directions, in order to decrease the oscillation transfer force to the floor surface 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum type washing machine in which a washing and dewatering drum rotates horizontally about an axis of a rotating shaft.

[0002]

2. Description of the Related Art Generally, in a drum type washing machine, 4
A water tank supported by four suspension devices in an outer box installed on the floor by the supporting legs of the location, and inside the water tank, a drive motor is used to freely rotate around the axis of the horizontal rotation axis by a drive motor. The washing and dewatering drum is provided, and the water tank is structured to have a degree of freedom in the front and rear, left and right directions, that is, the horizontal direction by a suspension device.

[0003]

In a drum type washing machine, the washing and dewatering drum is rotated at a high speed by a drive motor during a dehydrating operation, and the laundry is pressed against the outer periphery of the washing and dewatering drum by centrifugal force. Is performed. During the spin-drying operation, the washing and spin-drying drum has an unbalanced portion due to the laundry to be biased inside, and the water tank whirls due to the influence of the unbalanced portion.

On the other hand, at the start of dehydration,
A resonance phenomenon in which the vibration of the water tank increases is observed. That is, in the initial stage of the dehydration operation, a resonance phenomenon occurs in which the vibration of the water tank increases, and after passing the resonance point, the dehydration operation starts, and whirling vibrations occur, but these vibrations are reduced by the suspension device. Is planned.

However, of the whirling vibrations,
The horizontal vibration component in the horizontal direction perpendicular to the axis of the rotating shaft acts as a dynamic moment load around the longitudinal axis on the bottom plate at the bottom plate fixing portion supporting the lower end of the suspension device. As a result, the supporting leg portion acts as a vibrating force that vibrates in the vertical direction, and there is a problem that the vibration transmitting force to the floor surface increases.

To explain this point in detail, the dewatering rotation angular velocity of the washing and dewatering drum in the steady state of the dewatering operation is ω, the time is t, the vibration transmitting force Fz which is associated with the vertical vibration component, and the horizontal direction. Assuming that the vibration transmitting force Fx is the same as the vibration component, the Fz and Fx are sine waves and the phase difference is 90 °, respectively.

## EQU00001 ## Fz = A.coo (.omega.t), Fx = B.sin (.omega.t) (A and B are respective force amplitude values).

Therefore, the total transmission force Ft to the floor is
Ft = Fz + Fx, and it can be seen that the vibration transmission force to the floor is increased as shown by the solid line in FIG.

Accordingly, an object of the present invention is to provide a drum-type washing machine capable of reducing a vibration transmitting force to a floor surface vibrated in a vertical direction by a horizontal vibration component.

[0009]

SUMMARY OF THE INVENTION To achieve the above object, the present invention firstly provides a washing machine with a water tub and a drive motor inside the water tub. A washing and dewatering drum that is rotatably controlled as
On one side of the anti-vibration support mechanism body, supported on the water tank fixing part side,
A damping support part that absorbs horizontal vibrations perpendicular to the axis of the rotation shaft, and, on the other hand, supported on the bottom plate fixed part side,
An anti-vibration support mechanism having a damping support portion that absorbs horizontal vibration perpendicular to the axis of the rotating shaft, and a damping support portion at the bottom plate fixing portion side with respect to the damping support portion at the water tank fixing portion side. To reduce the damping capacity.

According to such a drum type washing machine, the laundry is rarely evenly distributed on the inner periphery of the washing and dewatering drum, and the laundry is touched by centrifugal force due to the unbalanced unbalanced portion. Vibration occurs. The vibration component in the vertical direction and the vibration component in the horizontal direction of the touching vibration are reduced mainly by the damping support portion on the side of the water tank fixing portion having a high damping ability and the main body of the vibration isolating support mechanism.

In this case, the horizontal vibration perpendicular to the axis of the rotating shaft also acts on the damping support portion on the floor plate fixing portion side, which is the lower end side of the vibration isolation support mechanism. Has a small damping ability, so that a dynamic moment load about the axis in the front-rear direction with respect to the floor plate vibrating in the vertical direction is suppressed at the support legs, and the vibration transmitting force to the floor surface is suppressed to a small value.

Further, according to the present invention, a washing and dewatering drum is provided in a washing machine main body, the washing and dewatering drum being rotatably controlled about a horizontal rotation axis by a drive motor inside the water tub, On one side of the vibration-proof support mechanism main body, supported on the water tank fixing part side, a damping support part that absorbs horizontal vibration perpendicular to the axis of the rotation shaft, and on the other side, supported on the bottom plate fixing part side, A vibration isolating support mechanism having a sphere and a sphere joint comprising a sphere receiving member.

As a preferred embodiment, a vibration absorber is provided on the bottom plate fixing portion supporting the spherical joint portion, where a damping force acts when the horizontal vibration of the water tank reaches an allowable value or more.

[0014] Alternatively, the peripheral wall of the bottom plate fixing portion supporting the spherical joint portion and the outer peripheral surface are in contact with each other, and the inner peripheral surface is in contact with surrounding the anti-vibration support mechanism, thereby absorbing vibration in the horizontal direction of the water tank. Provide body.

Alternatively, a predetermined gap is provided between the inner peripheral surface of the vibration absorber and the vibration isolating support mechanism. Alternatively, a gap is provided between the outer peripheral surface of the vibration absorber and the periphery on the bottom plate fixing portion side.

According to such a drum type washing machine, in the washing and dewatering drum, the laundry is rarely evenly distributed on the inner periphery, and the laundry is shaken by centrifugal force due to the unbalanced unbalance portion. Rotational vibration occurs.

The vertical vibration component and the horizontal vibration component of the whirling vibration are mainly attenuated by the damping support portion on the fixed side of the water tank having a high damping ability and the main body of the anti-vibration mechanism.

At the same time, horizontal vibration perpendicular to the axis of the rotating shaft also acts on the spherical joint on the floor plate fixing portion side, which is the lower end side of the vibration isolation support mechanism. A dynamic moment load about the longitudinal axis does not occur on the bottom plate that vibrates in the vertical direction, and the vibration transmitting force to the floor surface is suppressed to a small value.

On the other hand, at the initial stage of the start of dehydration, when the vibration of the washing and dehydrating drum passes through a resonance point, the vibration absorber and the vibration isolating support mechanism come into contact with each other to elastically deform and attenuate. This prevents interference between the water tub and the outer box serving as the main body of the washing machine.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes an outer box serving as a main body of the washing machine, and a bottom plate 3 of the outer box 1 is supported on a floor surface 7 by four support legs 5. The supporting leg 5 is formed of rubber or synthetic resin, and a screw portion 9 rising from the supporting leg 5 is supported by being screwed to the bottom plate 3, and the height can be adjusted by a screwing position.

In the outer box 1, a water tank 11, a washing and dewatering drum 13 disposed inside the water tank 11, and a drying air circulation air passage 15 through which drying air flows are arranged.

The water tank 11 is supported by four anti-vibration support mechanisms 17 and is connected and connected to an upper water supply valve 19 and a lower drain valve 21 respectively. Therefore,
Opening the water supply valve 19 enables water supply, and opening the drain valve 21 enables drainage.

As shown in FIG. 2, the anti-vibration support mechanism 17 has an anti-vibration support mechanism main body 23 and damping support portions 25 and 27 provided at the upper and lower ends of the anti-vibration support mechanism main body 23, respectively. The damping support portion 25 on the upper end portion has a support bracket 29 on which the water tank 11 is placed and set, and which is on the water tank fixing portion side.
Mounted on The lower end side damping support portion 27 is attached to the bottom plate 3 which is the bottom plate fixing portion side.

The main body 23 of the anti-vibration support mechanism includes a cylinder 31 disposed at a predetermined angle toward the inside and a cylinder 3
A piston rod 33 extending upward from 1
The lower end of the piston rod 33 is connected to a slide 35 that slides while contacting the inner wall surface of the cylinder 31. The piston rod 33 is urged upward by the urging spring 37 interposed in the cylinder 31 via the sliding body 35.

The upper damping support portion 25 is made of an elastic material such as rubber or synthetic resin having a high damping property.
The piston rod 33 is fixedly supported by being vertically tightened by a flange portion 39 of the piston rod 33 and a nut 43 screwed into a screw portion 41 with the mounting portion 29a of the piston 9 interposed therebetween.

The lower damping support portion 27 is vertically divided by an elastic material such as rubber or synthetic resin having low damping property with the bottom plate 3 interposed therebetween, and includes a cylinder 31 and a nut 47 screwed to the screw portion 45. It is fixed and supported by tightening from above and below.

On the other hand, the washing and dewatering drum 13 is rotatably supported by a horizontal rotating shaft 49 from the front to the back in FIG. 1, and an opening / closing door (shown in the figure) provided on the front panel of the outer box 1. Opening) allows the laundry to be taken in and out.

The rotary shaft 49 is supplied with rotational power from the drive motor 51, and is driven by the drive pulley 53 of the rotary shaft 49.
, And a transmission belt 57 is wound around the motor pulley 55 of the drive motor 51.

The drive motor 51 is fixedly set on the support bracket 29, and its rotation is controlled by turning on / off a control switch (not shown).

The drying air circulation passage 15 is formed by a duct, in which a blower, a dehumidifier, and a heater (all not shown) are arranged. One of the drying air circulation passages 15 communicates with a drying air inlet 59 of the washing / dewatering drum 13. The other is a washing and dewatering drum 1
3 is connected to the drying air outlet (not shown)
The drying air circulates in the washing / dewatering drum 13 via the drying air circulation passage 15.

During the spin-drying operation of the drum type washing machine thus constructed, the washing and spin-drying drum 13 rarely has a uniform distribution of the articles to be washed on the inner periphery, and the articles to be washed are uneven. Whirling vibration occurs due to the centrifugal force of the unbalanced portion.

The vertical vibration component and the horizontal vibration component of the whirling vibration mainly include the upper damping support portion 25 having a high damping ability and the vibration-damping support mechanism main body 23, for example, the urging spring 37. And the sum of the restoring force, the damping force due to the friction of the sliding member 35, and the like.

In this case, the damping support portion 27 on the bottom plate fixing portion side
Also, as shown in FIG. 2, the vibration in the left and right direction acts, but at this time, since the damping support portion 27 has a small damping capacity,
Moment load My around the longitudinal axis acting on the
As a result, the vibration force Fz acting on the support leg 5 in the vertical direction does not act, and the vibration transmission force Fx transmitted to the floor 7 is suppressed to a small value.

FIG. 3 shows another embodiment of the damping support portion of the anti-vibration support mechanism 17 attached to the bottom plate fixing portion side.

That is, the cylinder 3 of the vibration isolating support mechanism main body 23
A sphere 59 is provided at a lower portion of the base 1, and a sphere receiving member 61 that supports the sphere 59 so as to be rotatable 360 degrees is provided on the bottom plate 3 side, and the sphere 59 and the sphere receiving member 61 form a sphere joint 63. .

The other components are the same as those shown in FIG. 2, and thus are denoted by the same reference numerals and will not be described in detail.

Therefore, according to this embodiment, the washing and dewatering drum 13 rarely has a uniform distribution of the laundry on the inner periphery, and the laundry is unbalanced by the centrifugal force of the unbalanced portion. Whirling vibration occurs.

The vertical vibration component and the horizontal vibration component of the whirling vibration mainly include the upper damping support portion 25 having a high damping ability and the vibration isolating support mechanism main body 23, for example, the urging spring 37. And the sum of the restoring force, the damping force due to the friction of the sliding member 35, and the like.

In this case, the spherical joint portion 63 on the bottom plate fixing portion side
In this case, vibration in the left-right direction acts, but at this time, the spherical joint portion 63 is supported by a spherical surface, so that a dynamic moment load My around the longitudinal axis does not occur on the bottom plate 3. As a result, it does not act as a vertical excitation force on the support leg portion 5, and the vibration transmission force Fx to the floor surface 7 is suppressed to a small value.

In this case, instead of the spherical joint 63, FIG.
As shown in FIG. That is, the rotating shaft 4 of the washing / dehydrating drum 13 is provided on the vibration isolating support mechanism main body 23 side.
A mounting shaft portion 69 having a shaft hole 67 substantially parallel to 9 is provided, and mounting base portions 71, 71 rising up so as to sandwich the mounting shaft portion 69 from the front and rear (the front side in the drawing is omitted) on the bottom plate 3 side. ) Is provided.

The mounting base 71 has a shaft hole 6 of a mounting shaft 69.
7 and the same shaft hole 67 facing each other.
The mounting base 69 is provided with a coupling shaft 73 inserted into each shaft hole 67.
May be used as a means for rotatably connecting and supporting.

Thus, the dynamic moment load My acting on the bottom plate 3 due to the left-right vibration component of the water tank 11
Does not act, and the vibration transmitting force Fx to the floor 7 can be suppressed to a small value.

FIG. 5 shows an embodiment in which the lower end side of the anti-vibration support mechanism 17 attached to the bottom plate fixing portion side is a combination of a spherical joint portion 63 and a vibration absorber 81.

That is, a mounting recess 77 is formed in the bottom plate 3 and a reinforcing member 79 having a U-shaped cross section is provided inside the mounting recess 77.
Is provided. At the bottom of the reinforcing member 79, a sphere receiving member 61 and a sphere receiving member 61, which constitute a sphere joint 63 with the sphere 59 provided on the anti-vibration support mechanism main body 23 side, and a vibration absorber 81 are provided.

The vibration absorber 81 is formed of a material such as rubber or synthetic resin that can be elastically deformed when the cylinder 31 abuts, and has a predetermined space between the bottom tapered surface of the cylinder 31 and the vibration absorber 81. The structure has a gap d. The gap d is set between the vibration absorber 81 and the cylinder 31 when the left-right vibration component of the water tank 11 reaches or exceeds an allowable value.
Are set to the dimensions that abut each other.

The other components are the same as those shown in FIG. 3, and the same reference numerals are given and the detailed description is omitted.

Therefore, according to this embodiment, at the time of starting the dehydrating operation, the cylinder 31 of the vibration-isolation supporting mechanism main body 23 comes into contact with the vibration absorber 81 when passing through the resonance point of the water tank 11 where the vibration becomes maximum. Therefore, the resonance phenomenon at the beginning of the start of the dehydration operation is suppressed, and the interference between the water tank 11 and the outer box 1 can be reliably avoided.

On the other hand, at the time of dehydration operation which passes through the resonance point and causes constant vibration, the vibration absorber 81 does not contact the cylinder 31 of the main body of the vibration isolating support mechanism.

Further, the spherical joint portion 63 on the bottom plate fixing portion side
Is applied to the bottom plate 3, but a dynamic moment load My around the longitudinal axis does not occur on the bottom plate 3 because of the spherical support. As a result, it does not act as a vertical excitation force on the support leg portion 5, and the vibration transmission force Fx to the floor surface 7 is suppressed to a small value.

FIG. 6 shows another embodiment in which the lower end side of the vibration isolating support mechanism 17 attached to the bottom plate fixing portion side is a combination of a spherical joint portion 63 and a vibration absorber 75.

That is, a mounting recess 77 is formed in the bottom plate 3, and a reinforcing member 79 having a U-shaped cross section is provided inside the mounting recess 77.
Is provided. At the bottom of the reinforcing member 79, a sphere receiving member 61 that forms a sphere joint 63 with a sphere 59 provided on the vibration isolation support mechanism main body 23 side, and a vibration absorber 83 surrounding the sphere joint 63 are provided. Things.

The vibration absorber 83 is formed of a material such as elastically deformable rubber or synthetic resin, and has an inner peripheral surface formed of the cylinder 31 of the vibration isolating support mechanism main body 23 and an outer peripheral surface formed of the reinforcing member 79. It has a structure that always contacts the peripheral wall surface.

The other components are the same as those shown in FIG. 3, and the same reference numerals are given and detailed description is omitted.

Therefore, according to this embodiment, when the dehydration operation is started, the vibration absorber 83 works when the vibration passes through the resonance point of the water tank 11 where the vibration becomes maximum, resulting in attenuation. For this reason, the resonance phenomenon at the beginning of the start of the dehydration operation is suppressed, and the interference between the water tank 11 and the outer box 1 can be reliably avoided. In this case, since the vibration absorber 83 is always in contact with the cylinder 31 and absorbs vibration, the attenuation load on the upper attenuation support portion 25 can be reduced.

On the other hand, at the time of the dehydration operation which passes through the resonance point and has a constant vibration, the damping support 25 on the upper end and the vibration absorber 83 work simultaneously to reduce the vertical and horizontal vibration components. Plan. At the same time, vibration in the left-right direction acts on the spherical joint portion 63 on the side of the bottom plate fixing portion, but because of the spherical support, a dynamic moment load My around the longitudinal axis does not act on the bottom plate 3 and the floor surface Transmission force Fx to 7
Can be kept small.

In this case, as shown in FIG.
8, or between the inner peripheral surface of the vibration absorber 83 and the outer peripheral surface of the vibration absorber 83 and the inner peripheral surface of the reinforcing member 79 on the bottom plate fixed side, as shown in FIG. Between them, a means for providing a gap d1 that contacts when passing through the resonance point at the start of dehydration may be provided. Thereby, the same effect as that of FIG. 3 can be expected.

[0058]

As described above, according to the drum type washing machine of the present invention, of the whirling vibration during the spin-drying operation,
In particular, a dynamic moment load around the longitudinal axis acting as a vibrating force for vibrating in the vertical direction can be prevented in the support leg portion on the floor plate fixing portion side by the vibration component in the horizontal direction, so a new The vibration transmission force to the floor can be reduced without using any device and control means. In addition, the vibration absorber surely avoids interference between the water tank and the outer box during the resonance phenomenon at the start of the dehydration operation.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a drum type washing machine according to the present invention as viewed from the back.

FIG. 2 is an enlarged cross-sectional view of one portion of a vibration-proof support mechanism.

FIG. 3 shows the lower end side of the anti-vibration support mechanism as a spherical joint part.
FIG.

FIG. 4 is a schematic cross-sectional view similar to FIG. 2 in which the lower end side of the vibration-proof support mechanism is a shaft coupling part.

FIG. 5 is a schematic cross-sectional view similar to FIG. 3 in which the lower end side of the vibration isolation support mechanism is a combination of a spherical joint and a vibration absorber.

FIG. 6 is a schematic cross-sectional view similar to FIG. 5, showing another embodiment in which the lower end side of the anti-vibration support mechanism is a combination of a spherical joint and a vibration absorber.

FIG. 7 is a schematic cross-sectional view similar to FIG. 6, showing still another embodiment in which the lower end side of the anti-vibration support mechanism is a combination of a spherical joint portion and a vibration absorber.

FIG. 8 is a schematic cross-sectional view similar to FIG. 7, showing another embodiment in which the lower end side of the vibration-proof support mechanism is a combination of a spherical joint and a vibration absorber.

FIG. 9 is an explanatory view showing a vibration transmitting force to a floor surface.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Washing machine main body (outer box) 7 Floor surface 11 Water tank 13 Washing and dehydrating drum 17 Vibration-proof support mechanism 23 Vibration-proof support mechanism main body 25 Upper damping support part 27 Lower damping support part 49 Rotating shaft 51 Drive motor

Claims (6)

[Claims] 1. A washing machine and a washing / dewatering drum rotatably controlled by a drive motor about a horizontal rotation axis inside a washing tub in a washing machine main body, and one of a vibration isolating support mechanism main body. A damping support portion that is supported on the water tank fixing portion side and absorbs horizontal vibration perpendicular to the axis of the rotation shaft, and, on the other hand, is supported on the bottom plate fixing portion side and the rotation shaft is And a damping support mechanism having a damping support section that absorbs vertical horizontal vibrations, wherein the damping capacity of the damping support section on the bottom plate fixing section side is reduced with respect to the damping support section on the tank fixing section side. A drum type washing machine characterized by the following. 2. A washing and dewatering drum which is rotatably controlled about a horizontal axis of rotation by a drive motor inside a water tub in the washing machine main body and a driving motor inside the water tub; A damping support portion that is supported on the water tank fixing portion side and absorbs horizontal vibration perpendicular to the axis of the rotating shaft, and, on the other hand, includes a sphere and a sphere receiving member supported on the bottom plate fixing portion side. A drum-type washing machine comprising: a vibration-proof support mechanism having a spherical joint. 3. The vibration absorbing member according to claim 2, wherein a damping force is applied to the bottom plate fixing portion supporting the spherical joint when the lateral vibration of the water tank reaches an allowable value or more. Drum type washing machine. 4. A vibration absorber that contacts the peripheral wall on the bottom plate fixing portion side supporting the spherical joint portion and the outer peripheral surface, contacts the inner peripheral surface so as to surround the anti-vibration support mechanism, and absorbs horizontal vibration of the water tank. The drum type washing machine according to claim 2, further comprising a body. 5. The drum type washing machine according to claim 4, wherein a predetermined gap is provided between the inner peripheral surface of the vibration absorber and the vibration isolating support mechanism. 6. The drum type washing machine according to claim 4, wherein a predetermined gap is provided between the outer peripheral surface of the vibration absorber and the periphery of the bottom plate fixing portion.