JPS5910830B2 - Vibration isolation device for dehydrating washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration isolating device for a dehydrating washing machine, which effectively absorbs the horizontal movement of the outer tub caused by the load balance distribution of the laundry when starting dehydration. Its purpose is to prevent collisions with the main body.

In this type of conventional dehydrating washing machine, large vibrations occur in the horizontal and vertical directions due to the unbalanced distribution of laundry when starting dehydrating.

In this case, vertical vibrations are absorbed by the sliding friction between the spring and the inner wall of the rubber buffer tube and the spring receiver.

In addition, horizontal vibrations are damped by sliding friction between the spherical bodies installed above and below the support rod and the support metal fittings, but since the friction damping is not sufficient when starting dewatering, the horizontal movement of the outer tank is At the same time, the pendulum movement continued for a long time, causing the device to collide with the main body or cause the safety switch to be activated immediately, resulting in failure of normal dehydration.

The present invention has been made to solve the above-mentioned conventional problems, and embodiments of the present invention will be described below with reference to the accompanying drawings.

In the figure, 1 is the main body of the dehydrating washing machine, 2 is a washing and dehydrating tank with a plurality of dehydrating grooves 2' formed on the inner circumferential wall, 3 is an outer tank in which the washing and dehydrating tank 2 is rotatably installed, and 4 5 is the rotary blade installed at the center bottom of the washing and dehydration tank 2, and 5 is the washing and dehydration tank 2.
This bearing 5 has a built-in clutch for switching between washing and dewatering.

Reference numeral 6 denotes a motor attached to the bottom of the outer tub 3, and the power of this motor 6 is transmitted to the rotary blade 4 or the washing/dehydrating tub 2 via a motor pulley 7, a belt 8, an impeller pulley 9, and a bearing 5.

Reference numeral 10 denotes an upper supporter fixed to the four upper corners of the main body 1, and an upper spherical seat 11 made of synthetic resin is attached to this supporter 10.

The spherical seat 11 receives an upper spherical body 12 formed of a synthetic resin different from the material of the spherical seat 11, or a synthetic resin of the same material but with different components.

Further, the upper part of a support rod 14 suspended from the upper part of the outer tank 3 and the main body 1 is inserted into this spherical body 12 and fixed with a nut 13.

15 is a lower support fixed to the lower side of the outer tank 3;
A lower spherical catch 16 molded from synthetic resin is attached to this support 15 as well as the upper spherical catch 11, and the material is different from that of the spherical catch 16, or the same material is made of a different composition. A lower spherical body 17 made of synthetic resin is supported, and the support rod 14 is attached to this spherical body 17.
It is inserted through the lower part of the tube so that it can slide up and down.

Further, one end of a cylindrical buffer tube rubber 18 is fixed to the spherical body 17, and a compression spring 19 is installed between the lower part of the spherical body 17 of the bracket and the spring receiver 20 at the lower end of the support rod 14. I'm getting lost.

The above-mentioned members 10 to 20 constitute a vibration isolator that suspends and supports the outer tank 3 from the upper part of the main body 1.

Regarding the operation of the above structure, when washing water is poured into the washing and dehydrating tub 2 during washing, the outer tub 3 is lowered by its weight.

This lowering causes the compression spring 19 to be compressed.

During washing, the rotary blades 4 rotate and the laundry is moved only by the water flow, so the vibration of the outer tub 3 is relatively small, and therefore sufficient vibration isolation is achieved.

On the other hand, during dehydration, the washing water in the washing/dehydrating tub 2 is discharged to the outside, so the weight of the outer tub 3 gradually decreases.

With this decrease, the compression spring 18 becomes slightly expanded, and absorbs vibrations of the outer tub 3 caused by unbalanced distribution of the laundry at the start of dewatering.

Generally, vibrations during dehydration can be divided into horizontal vibrations and vertical vibrations.

For vibration in the horizontal direction, the upper and lower spherical bodies 12, 1
Damping is achieved by sliding friction between the upper and lower spherical seats IL16 and the upper and lower spherical seats IL16, but if the friction is large during steady rotation, the energy transfer to the main body 1 becomes large, and the vibration of the main body 1 becomes large, causing the user to The value is kept low to avoid discomfort.

Therefore, if the laundry is extremely uneven, the horizontal vibrations of the outer tub 3 may not be sufficiently absorbed, and
As before, the upper and lower spherical seats 11. When 16 is made of sheet metal, there is a problem in that the accuracy of the spherical part is sufficiently high, but as a result, the degree of friction varies.

Therefore, in the embodiment of the present invention, the spherical seat 11.16 and the spherical body 12.17 are made of synthetic resins made of different materials, or of synthetic resins of the same material but with different components, as described above.

That is, it is constructed from a combination of polyamide resin (nylon 6) and polypropylene, a combination of polyamide resin (nylon 6) and polyacetal, a combination of polyamide resin (nylon 6) and polyamide resin (nylon 66), etc.

Figure 3 shows a comparison of the coefficient of friction between materials between a conventional example and an example of the present invention.As shown in Figure 3, the coefficient of friction between different materials is larger depending on the material. different.

When the conventional spherical bearing is made of steel plate and the spherical body is made of polyacetal, the coefficient of friction is smaller than that of other types, and the static friction is also small.

Therefore, it was not possible to suppress the dog-like shaking of the outer tank in the initial stage of startup.

However, as in the embodiment of the present invention, the spherical catch 11.1
Polyamide resin (nylon 6) for 5, spherical body 12.1
When polyamide resin (nylon 66) is used for 7, the static friction is very tight, so it is possible to sufficiently suppress the large vibration of the outer tank 3 at the beginning of the retreat, and conversely, the dynamic friction becomes small. , the vibration of the outer tank 3 during steady rotation causes the main body 1 to
It is also possible to prevent the information from being transmitted to.

Here, almost the same performance was obtained even when polyamide resin (nylon 6) was used for the spherical seat IL16 and polyamide resin (nylon 66) was used for the spherical body 12.17, and even when the materials were reversed.

Furthermore, the same applies to combinations of other materials, and appropriate combinations may be used as necessary, and the shape and configuration are not limited to the examples.

Also, the relationship between the spherical body and the spherical catch described above is the support rod 1.
It is clear that the effect can be expected even if it is applied to either the upper or lower part of 4.

As is clear from the above embodiments, according to the present invention, the spherical body and the spherical seat are made of synthetic resin and their materials are appropriately selected to reduce static friction and reduce dynamic friction. Therefore, it is possible to greatly attenuate the horizontal vibration of the outer tank when dewatering starts, and the coefficient of friction during steady rotation is also reduced, so the transmission of vibrational energy to the main body can be suppressed.

In addition, by making the spherical seat made of resin, it becomes easier to process the spherical surface, and sufficient precision can be obtained, so that vibration damping can be uniform.

[Brief Description of the Drawings] Fig. 1 is a vertical sectional view of a dehydrating washing machine equipped with a vibration isolator according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the same vibration isolator, and Fig. 3 is an enlarged sectional view of the same vibration isolator.
The figure is a graph showing a comparison of the coefficient of friction between materials between a conventional example and that of the present invention. 1...One body, 2...Washing and dehydration tank, total.
...Outer tank, 4...Rotor blade, 10.15...
...Supporting metal fittings, 11,16-...Spherical catch,
12.17... Spherical body, 14... Support rod.

Claims (1)

[Claims] 1 A washing and dehydrating tank having a rotary blade at the bottom, an outer tank in which the washing and dehydrating tank is rotatably installed, and a vibration isolator that suspends and supports this outer tank from the outside of the main body. The device has a support rod that suspends the outer tank from the upper part of the main body, a spherical body provided on at least one of the upper and lower parts of the support rod, and a spherical seat for receiving the spherical body. A vibration isolator for a dehydrating washing machine, in which one of the components is made of a polyamide resin, and the other is made of a synthetic resin of polyamide resin, polypropylene resin, or polyacetal resin, which has a different component from the polyamide resin. .