JP2003079995A - Drum type washing machine - Google Patents

Abstract

(57) [Summary] To reduce vibration of a drum type washing machine. In a drum type washing machine having a built-in water tank,
A supported portion composed of the water tank 3, the drum 4, and the motor 5 is supported by one suspension 7 on the front side of the center of gravity and two suspensions 7 on the rear side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement of elastic holding means for supporting a water tub in a drum type washing machine.

[0002]

2. Description of the Related Art Conventional drum type washing machines have problems that it is difficult to put in and take out laundry, and vibration and noise are large. In order to solve this in recent years, Japanese Patent Laid-Open No. 2000-2627
There is a drum-type washing machine that incorporates the technology described in Japanese Patent Publication No. 96. The tilting of the water tank facilitates the loading and unloading of laundry, and vibration is suppressed by devising the arrangement of elastic holding means for supporting the water tank.

In one of the drum type washing machines to which these techniques are applied, as shown in FIG. 8, a water tank 53 tilted with the front side upward is provided inside a housing 51, and two water tanks 53 are provided below the water tank 53. It is configured to be supported by a suspension 57, which is an elastic holding means, and two springs 60 that are regulated in the front-rear direction at the upper part. Inside the water tank 53, a drum 54
Is arranged in parallel with the water tank 53 so as to be rotatable on the horizontal axis. The rotating shaft 59 of the drum 54 penetrates the rear portion of the water tank 53 in a watertight manner and is attached to the rear portion of the water tank 53.
It is fastened to the rotating shaft of the motor 55 which is fixed to 8.

In another embodiment, as shown in FIG. 9, a water tank 53 arranged substantially horizontally is supported by four suspensions 57 which are elastic holding means. Two of them are arranged in front of the center of gravity G of the supported body composed of the water tank 53, the drum 54, the housing 58, and the motor 55, and the other two are arranged behind.

[0005]

When the drum type washing machine is operated, the laundry in the drum 54 rotates together with the rotation of the drum 54. At this time, if the laundry in the drum 54 is offset, the centrifugal force causes the water tub 53 to be vibrated and vibrated vertically, horizontally, and back and forth. At this time, the suspension 57 acts to suppress the vibration of the water tank 53. However, like the drum type washing machine of FIG.
If the configuration is such that two suspensions 57 support a position substantially below the center of gravity G of the supported body composed of the drum 54, the housing 58, and the motor 55, it is unbalanced at a position apart from these two suspensions 57. When the vibration occurs, the vibration of the water tank 53 increases at that position, and it is difficult to suppress the vibration with only the two suspensions 57. The drum type washing machine shown in FIG. 9 requires four suspensions.

The present invention makes it easy to put in and take out laundry,
It is an object of the present invention to provide a low-priced drum-type washing machine with less vibration and noise.

[0007]

DISCLOSURE OF THE INVENTION A drum type washing machine of the present invention is provided with a water tub, which is arranged in a casing of a washing machine with an inclination of 10 to 30 ° higher than horizontal, and rotatably provided in the water tub. It also has a drum for storing laundry and a motor for driving the drum to rotate, and the water tank has a total of three suspensions, one suspension arranged on the front side and two suspensions arranged on the rear side. It is characterized by being supported from below by a suspension. Further, these three suspensions may be arranged in a state of being inclined in the front-rear direction, and the inclination angle in the front-rear direction of the rear suspension may be smaller than the inclination angle of the front suspension. In addition, the front suspension supports a position that is about twice the distance in the front-rear direction from the center of gravity to the rear suspension with respect to the center of gravity of the supported portion that is configured by the water tank, drum, motor, etc. You should do it. In addition, the front suspensions are arranged in a state of being inclined in the front-rear direction, and the two rear suspensions are mounted outward at an angle of about 60 ° to the rotation axis of the drum when viewed from above. The distance in the front-rear direction from the attachment position of the rear suspension to the water tank to the attachment position to the bottom surface of the housing is the distance between the attachment position of the front suspension and the water tank to the bottom surface of the housing. The distance to the position in the front-rear direction may be set to about half.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a side view of the inside of the drum type washing machine of this embodiment. FIG. 2 is a front view of the inside of the drum type washing machine, showing the positional relationship of the suspensions.

On the front surface of the casing 1 of the washing machine, there is an inlet for laundry and a door 2 is provided. By opening and closing the door 2,
Put the laundry in and out. Further, inside the housing 1, a cylindrical water tank 3 is arranged which is inclined by 10 to 30 ° with respect to the horizontal with the input port side facing upward and the input port side is open. The inlet and the opening of the water tank 3 are connected by a bellows-like rubber bellows 6 so that the laundry does not fall into the housing 1 when the laundry is taken in and out. Inside the water tank 3, a cylindrical drum 4 having a large number of holes and one end opened is rotatably provided. At the center of the bottom of the drum 4, there is a rotating shaft 9
Is fastened, and the rotating shaft 9 penetrates the center of the bottom surface of the water tank 3 in a watertightly sealed and rotatable state. A flange 8 is fixed to the rear bottom surface of the water tank 3, and a motor 5 that rotationally drives the drum 4 is fixed to the flange 8. The rotary shaft 9 of the drum 4 is fastened to the rotary shaft of the motor 5.

In this way, the drum 4 can be rotated to the left or right in the water tank 3 by the motor 5 provided at the rear portion of the water tank 3, and the washing, rinsing, dehydration and drying steps are performed while rotating the drum 4.

The water tank 3 to which the drum 4 and the motor 5 are attached is elastically supported by three suspensions 7 provided below the water tank 3. The structure and arrangement of the suspension 7 will be described later in detail.

A water supply unit 11 is provided on the upper part of the casing 1, and water used for washing and rinsing passes through a water supply port 12, a water supply valve 13 and a detergent case 14 provided on the upper part of the casing 1 to form a water tank. It is poured inside. Further, the water after washing and rinsing and the water at the time of dehydration are drained from a drain valve 15 provided at the bottom of the water tank 3.

A drying unit 21 is arranged above the water tank 3. At the time of drying, the blower fan 22 provided on the upper portion of the water tank 3 operates to blow the high temperature air into the water tank 3 through the heater 24. The moist air in the aquarium 3 containing a large amount of water from the laundry after dehydration is guided to the dehumidifying duct 23, is water-cooled and dehumidified in the dehumidifying duct 23, and is then returned to the aquarium 3.

Next, the arrangement of the three suspensions 7, which is the essential point of the present invention, will be described. First, the mounting position of the suspension 7 on the water tank 3 will be described.

One of the three suspensions, 7A, is arranged in front of (in front of) the center of gravity G of the supported portion composed of the water tank 3, the drum 4, the motor 5, the flange 8 and the drying unit 21, and the remaining 2 The suspensions 7B and 7C of the book have a center of gravity G.
Place it more rearward (rear side).

The suspension 7A arranged at the front is
The water tank 3 is arranged substantially in the center in the left-right direction when viewed from the front surface (opening side). The suspensions 7B and 7C arranged at the rear are arranged at symmetrical positions on the side surface of the water tank 3.
Distance L1 from the center of gravity G to the front suspension 7A
Is the distance L from the center of gravity G to the rear suspension 7B
Set longer than 2.

Next, the mounting positions of these suspensions on the bottom surface of the housing 1 will be described.

The suspension 7A arranged at the front is
It is attached to the bottom so that it is perpendicular to the bottom of the housing 1.

Suspensions 7B, 7 arranged at the rear
C is attached to the floor surface of the housing 1 at a position outside the attachment position to the water tank 3, that is, supports the supported portion in a state of being inclined in the left-right direction.

The suspension 7 is a device that gives a spring action and a damping action, and is composed of a piston 30, a cylinder 31, and a spring 32, for example, as shown in FIG. The spring 32 is arranged outside the cylinder 31, and connects the piston rod 33 and the cylinder 31. By disposing the spring 32 outside the cylinder 31, the suspension can be shortened. Piston 30 and cylinder 3
The frictional resistance between 1 and 1 provides a damping action.

Rubber bushes 34 are provided at the upper and lower mounting portions of the suspension 7, and when the water tank 3 or the housing 1 is mounted on the floor surface, these previously fixed mounting members 35 are sandwiched. Figure 7
Is an example of a suspension, the spring may be arranged inside the cylinder, and the damping means may be based on fluid resistance.

As described above, by disposing the three suspensions 7 so as to surround the center of gravity G of the supported portion composed of the water tank 3, the drum 4, the motor 5, the flange 8, and the drying unit 21, the supported portion is supported. Can be stably supported in an independent state, and vibration can be suppressed.

In the above description, the inside of the housing 1 is
The drum-type washing machine in which the cylindrical water tub 3 inclined by 10 to 30 ° with the inlet side facing upward and having the inlet side opened is described, but the present invention is not limited to this. For example, the water tank 3 is the housing 1
Obviously, it may be installed parallel to the bottom surface of the. That is, the structure shown in FIG. 9 of the related art may be used except for the number of suspensions.

This stability leads to reduction in manufacturing time and cost. After assembling the supported part, attach the suspension, and in this self-supporting state, the surrounding housing,
This is because it becomes possible to assemble the water supply unit, the bellows, etc. one after another.

The inclination angle of the water tank 3 can be adjusted only by the length of the suspension 7A.

Further, even if an unbalance of the laundry is generated at a position away from the center of gravity G in the actual washing and the water tub 3 vibrates greatly at that position, a large damping action can be given and the vibration is suppressed. To be

Also, by supporting with three suspensions, the two springs arranged above the water tank 3 which were required when conventionally supporting with two suspensions (see FIG. 8) are unnecessary. Therefore, the space between the upper part of the water tank 3 and the ceiling of the housing 1,
There is a space on the upper surface of the aquarium 3. Then, the water supply unit 11 and the drying unit 21 can be arranged freely.

Further, compared with the conventional drum type washing machine with four suspensions shown in FIG. 9, there is an effect that one suspension can be reduced while maintaining stability.

As in this embodiment, the water tank 3 is arranged so as to be inclined,
When the laundry is easily taken in and out, this inclination makes it easier for the laundry to accumulate behind the drum 4 in the washing and rinsing steps, and the laundry tends to be biased behind the drum 4. As a result, there is a high probability that vibration will increase behind the water tank 3. In other words, the rear of the water tank 3 is often shaken greatly. The arrangement of the suspension 7 of this embodiment is particularly effective in this case.

This is because by arranging more suspensions in the rear than in the front of the water tank 3, the above-mentioned vibration can be suppressed by this damping action and the suspension can be held more stably.

The second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a side view of the inside of the drum type washing machine of this embodiment. In the figures, the same numbers as those in FIGS. 1 and 2 indicate the same items.

In this embodiment, as in the first embodiment, three suspensions 7 are used, and the water tank 3, drum 4, motor 5,
It supports a supported portion composed of the flange 8 and the drying unit 21.

The difference from the first embodiment is that the suspension 7A in front of the water tank 3 is not mounted vertically, and
It is attached to the bottom surface of the casing 1 in front of the position attached to. That is, the suspension 7A supports the supported portion while being inclined in the front-rear direction.

Further, rear suspensions 7B and 7C
Is attached to the bottom surface of the housing 1 behind the position attached to the water tank 3. That is, the suspensions 7B, 7
C supports the supported portion while being inclined in the front-rear direction.
Furthermore, as described in the first embodiment, these are supported in a state of being inclined in the left-right direction.

At this time, in order to stably support the supported portion, the front-rear force of the front suspension 7A and the front-rear force of the two rear suspensions 7B and 7C must be balanced. Therefore, the inclination θ1 of the suspension 7A in the front-rear direction is
It is set to be larger than the inclination θ2 in the front-rear direction of B and 7C.

In this way, the suspension also acts in the front-rear direction, and the water tank 3 can be supported more stably and independently. Further, it is possible to give a greater damping effect to the vibration in the front-back direction than in the first embodiment, and it is possible to further suppress the vibration.

A third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a side view of the inside of the drum type washing machine of this embodiment. In the figures, the same numbers as those in FIGS. 1, 2, and 3 indicate the same items.

In this embodiment, the positions where the three suspensions 7 in the first and second embodiments shown above are attached are shown. The drum type washing machine of the present embodiment has a suspension 7 in front of the center of gravity G when viewed from the side.
The distance L1 to A is set to be approximately twice the distance L2 from the center of gravity G to the rear suspensions 7B and 7C. Further, each suspension 7 supports the water tank 3 at substantially the same height H from the floor surface.

By doing so, the forces acting on the respective suspensions 7 become substantially equal, and all three suspensions can be made of the same component. At this time, it is preferable to attach the two rear suspensions 7B and 7C to the rear surface of the water tank 3 which is harder than the side surfaces thereof.

However, depending on the mounting angles of the front and rear suspensions 7, the required suspension length may be slightly different. Therefore, on the bottom surface of the housing 1, the surface on which the front suspension 7A is mounted and the surface on which the rear suspensions 7B and 7C are mounted are not set to the same height. Alternatively, the rubber bushes 34 sandwiched between the mounting portions of the suspension 7 are not used with the same thickness in the front and the rear. By doing so, it is possible to use the suspensions of the same three components.

Next, FIGS. 5 and 6 show a fourth embodiment of the present invention. FIG. 5 is a side view of the inside of the drum type washing machine of this embodiment. In the figures, the same numbers as those in FIGS. 1 to 4 indicate the same things.
Further, FIG. 6 is a view of the mounting positional relationship of the three suspensions 7 in the drum type washing machine of this embodiment as seen from above.

The distance L1 in the front-rear direction from the center of gravity G of the supported portion consisting of the water tank 3, the drum 4, the motor 5, the flange 8, and the drying unit 21 to the front suspension 7A is
The distance L2 in the front-rear direction from the center of gravity G to the rear suspensions 7B and 7C is set to about twice. Further, each suspension 7 supports the water tank 3 at substantially the same height H from the floor surface. Further, the suspension 7A in front of the water tank 3 supports the supported portion while being inclined in the front-rear direction. Further, the rear suspensions 7B and 7C are supported in a state of being inclined in the front-rear and left-right directions, and the angle θ with respect to the rotation axis of the water tank 3 is set to about 60 ° when viewed from above as shown in FIG. It is installed toward.

At this time, the distance in the front-rear direction from the mounting position of the suspension 7A to the water tank 3 to the mounting position of the bottom surface of the housing 1 is D1. On the other hand, the distance D2 in the front-rear direction from the mounting position of the suspensions 7B, 7C behind the water tank 3 to the water tank 3 to the mounting position of the bottom surface of the housing 1 is set to about half of D1. With such a configuration, damping of the suspension 7 acts not only on the vertical direction but also on the longitudinal and lateral vibrations, and the vibrations can be suppressed. Further, since the lengths of the suspensions 7 are the same and the load acts evenly, the three suspensions are composed of the same parts without adjusting the height of the mounting surface of the housing 1 and the rubber bush 34. be able to.

[0045]

As can be seen from the above description, the present invention has the following advantages.
By supporting the supported portion composed of the water tank, the drum, the motor and the like with one suspension on the front side of the center of gravity and two suspensions on the rear side of the center of gravity, it is possible to stably and independently support. Further, it becomes possible to suppress vibration well.
Further, by attaching the three suspensions while inclining them in the front-rear direction, the vibration in the front-rear direction can be further suppressed.

[Brief description of drawings]

FIG. 1 is a side view of the inside of a drum type washing machine according to a first embodiment of the present invention.

FIG. 2 is a front view of the inside of the drum type washing machine according to the first embodiment of the present invention.

FIG. 3 is a side view of the inside of the drum type washing machine according to the second embodiment of the present invention.

FIG. 4 is a side view of the inside of the drum type washing machine according to the third embodiment of the present invention.

FIG. 5 is a side view of the inside of the drum type washing machine according to the fourth embodiment of the present invention.

FIG. 6 is a diagram showing a mounting position of a suspension according to a fourth embodiment of the present invention.

FIG. 7 is a sectional view of a suspension used in an embodiment of the present invention.

FIG. 8 is a side view of the inside of a drum type washing machine including a conventional inclined water tank.

FIG. 9 is a side view of the inside of a drum type washing machine in which a conventional water tank is horizontally supported.

[Explanation of symbols]

1 ... Washing machine casing, 3 ... Water tank, 4 ... Drum, 5 ... Motor, 7 ... Suspension.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Ritsumoto Teramoto             502 Kintatemachi, Tsuchiura City, Ibaraki Japan             Tate Seisakusho Mechanical Research Center (72) Inventor Michiaki Ida             502 Kintatemachi, Tsuchiura City, Ibaraki Japan             Tate Seisakusho Mechanical Research Center (72) Inventor Shuji Aida             502 Kintatemachi, Tsuchiura City, Ibaraki Japan             Tate Seisakusho Mechanical Research Center F term (reference) 3B155 AA01 AA06 BA03 BA04 BB05                       CA02 CB07 CB32 DB14 DD01                       MA02

Claims (6)

[Claims] 1. A drum type washing machine including a water tub arranged in a casing of a washing machine, a drum rotatably provided in the water tub and containing a laundry, and a motor for rotationally driving the drum. A drum-type washing machine characterized in that one suspension is provided on the front side of the water tank and two suspensions are provided on the rear side of the water tank, and the suspensions are elastically supported from below by the three suspensions. 2. The drum type washing machine according to claim 1, wherein the water tub is arranged at an angle of 10 to 30 ° with respect to the horizontal with respect to the casing of the washing machine so that the front side becomes higher. Drum type washing machine. 3. The drum type washing machine according to claim 1 or 2, wherein the front suspension has two rear suspensions from the center of gravity with respect to the center of gravity of a supported portion composed of an aquarium, a drum, a motor and the like. A drum-type washing machine that is supported at a position that is longer than the front-rear distance to the suspension. 4. The drum type washing machine according to claim 3, wherein the three suspensions are arranged in a state of being inclined in the front-rear direction, and the inclination angle of the rear suspension in the front-rear direction is that of the front suspension. A drum type washing machine characterized by having a smaller inclination angle. 5. The drum type washing machine according to claim 1, 2 or 4, wherein the front suspension is located behind the center of gravity of a supported portion formed of an aquarium, a drum, a motor and the like. A drum-type washing machine that is supported at a position that is about twice the distance in the front-rear direction to the side suspension. 6. The drum type washing machine according to claim 5, wherein the front suspension is disposed in a state of being inclined in the front-rear direction, and the two rear suspensions are arranged on the rotary shaft of the drum when viewed from above. In addition to being mounted outward at an angle of about 60 °, the distance in the front-rear direction from the attachment position of the rear suspension to the water tank to the attachment position to the bottom of the housing is the front suspension. The drum type washing machine is characterized in that it is set to about half the distance in the front-rear direction from the mounting position with the water tank 3 to the mounting position with the bottom surface of the housing.