JPH0728988B2 - Automatic washing machine - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to household automatic washing machines.

2. Description of the Related Art Conventionally, this type of automatic washing machine has a structure as shown in FIG. That is, the speed reducer 2 is fixed to the lower part of the outer tub 1 for receiving water at the time of dehydration.
Is connected by a belt to a motor 3 fixed to the lower part of the outer tub 1. The drive shaft of the speed reducer 2 has a two-axis structure,
A dehydration tub 4, which is located inside the outer tub 1 and also serves as a washing tub, is fixed to the outer shaft. A stirring blade 5 located inside the dehydration tank 4 is fixed to the inner shaft. The outer tub 1 is vibration-isolated from the washing machine body 7 via a suspension 6 for vibration isolation. The conventional general automatic washing machine has the above-mentioned configuration and automatically performs water supply, washing, drainage, and centrifugal dehydration.

Problems to be Solved by the Invention In such a conventional configuration, when the spin-drying tub 4 is rotated and centrifugally dehydrated, a large vibration is generated due to an imbalance caused by the deviation of the clothes, which causes noise. Has become
It is an object of the present invention to provide a washing machine that can reduce noise and vibration generated due to uneven displacement of clothes in an automatic washing machine.

MEANS FOR SOLVING THE PROBLEMS The automatic washing machine of the present invention includes a main body of a washing machine, an outer tub which includes a washing / dehydrating tub and is vibration-isolated and supported by a suspension in the main body, and a washing / dehydrating tub. It is characterized in that it is equipped with a stirring blade for stirring, a washing and water tub and a motor for driving the stirring blade, and that a thin plate is arranged in an L shape at an inner corner of the main body via an elastic body.

Action With this configuration, among the noise caused by the vibration generated during the dehydration process due to the imbalance caused by the uneven displacement of the clothes, the noise of about 300 Hz related to the air column sounding inside the washing machine body is Sound is absorbed by resonating with a thin plate supported by an elastic body with high viscosity.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. It should be noted that components having the same functions as those in FIG. 4 are designated by the same reference numerals and the description thereof will be omitted.

1 and 2 show an automatic washing machine according to the present invention, and are different from FIG. 4 in the following points. That is, metal thin plates 8 are attached to four corners inside the washing machine main body 7 via elastic bodies 9 such as rubber having a large viscosity.

With this configuration, first, the clothes and detergent to be washed are first put in the dehydration tub 4, and a certain amount of water is supplied when electricity is supplied. When the water supply is completed, the stirring blades 5 automatically start to rotate and the clothes are removed from the tub. Launder with stirring. After washing for a certain period of time, drainage and rinsing are repeated several times, and after the drainage is completed, the dehydration tank 4 rotates and the clothes are centrifugally dehydrated. The above is the same as the conventional one. During this dehydration process, it is assumed that an imbalance occurs due to the deviation of clothes and the dehydration tank and the outer tank vibrate violently. First, the case where the thin plate 8 and the elastic body 9 are not provided will be described.

Since the outer tub 1 is elastically supported by the washing machine main body 7 by the suspension 6, the generated vibration is generated.
Vibrations transmitted to the floor and the like are significantly reduced. However, with respect to noise, noise due to vibration is generated from the outer tub 1 and propagates to the outside through the gap 10 between the floor and the washing machine body 7.
This noise has various frequency components, but among them, the noise around 300 Hz is large, and even if the bottom plate 11 shown by the dotted line is attached to the bottom of the main body as a soundproofing measure, it is not very effective and low noise. It is a big obstacle in making a noise washing machine. As a result of examining this kind of noise,
A standing wave 12 having a half wavelength as shown in FIG. 3 is generated in the lateral direction between the washing machine body 7 and the outer tub 1, and the standing wave causes noise around 300 Hz. To do. Focusing on the property that the sound pressure level of the standing wave is maximum in the internal corner of the washing machine body 7, the thin plate 8 is provided through the elastic body 9 to prevent the standing wave 12 from being generated. It's suppressed.

That is, when the resonance frequency determined by the elastic body 9 and the thin plate 8 is in the vicinity of 300 Hz, the acoustic incident impedance becomes extremely small in the vicinity of the resonance frequency, so that the generation of standing waves in the vicinity of 300 Hz is suppressed. Further, the vibration of the washing machine body 7 itself is suppressed by the elastic body 9 having a large viscosity, and the washing machine body 7
The sound insulation characteristics of are also improved.

EFFECTS OF THE INVENTION As described above, in the automatic washing machine of the present invention, the thin plate is arranged in the L-shape at the inner corner of the main body of the washing machine through the elastic body. By suppressing the standing wave by damping it with the body, and also suppressing the vibration of the main body itself and enhancing the sound insulation effect, the noise of the automatic washing machine can be reduced.

[Brief description of drawings]

FIG. 1 is a horizontal sectional view of an automatic washing machine of the present invention, FIG. 2 is a vertical sectional view of FIG. 1, FIG. 3 is an explanatory view of how standing waves are generated inside the washing machine body, and FIG. FIG. 4 is a partial sectional view of a conventional automatic washing machine. 1 ... Outer tank, 4 ... Dehydration tank, 6 ... Suspension, 7
...... Washing machine body, 8 ...... Thin plate, 9 …… Elastic body

Claims (1)

[Claims] 1. A main body of a washing machine, and an outer tub which contains a washing / dehydrating tub and is vibration-isolated and supported through a suspension in the main body.
An automatic laminating machine having a stirring blade for stirring in the washing / dehydrating tank and a motor for driving the washing / dehydrating tank and the stirring blade, and a thin plate arranged in an L shape at an inner corner of the main body via an elastic body. Washing machine.