JPH0732833B2 - Anti-vibration device for dehydration washing machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a dewatering washing machine for washing and dewatering clothes and the like according to the present invention.

2. Description of the Related Art Conventionally, this type of dewatering washing machine has a structure as shown in FIG. 3 as shown in Japanese Patent Publication No. 48-12131. That is, in the figure, 1 is a main body, 2 is a washing and dehydrating tub, and has a large number of small holes 3 on its side surface and bottom surface. 4 is an outer tub provided on the outer periphery of the washing / dehydrating tub 2, 5 is a stirring blade provided at the center of the washing / dehydrating tub 2, 6 is a bearing of the stirring blade 5,
Reference numeral 7 denotes a bearing of the washing / dehydrating tub 2, which has a built-in switching clutch for washing / dehydrating. A motor 8 is attached to the bottom of the outer tank, and the power is transmitted to the stirring blade 5 via the small pulley 9, the belt 10 and the large pulley 11.

Further, upper support fittings 13 having hemispherical seats 12 are fixed to the upper four corners of the main body 1, a spherical body 14 is rotatably supported on the seats, and an upper end of a support rod 15 is inserted therethrough, and a nut 16 is provided. On the other hand, a non-part support metal fitting 18 having a hemispherical seat 17 is fixed to the lower side surface of the outer tub 4, and a spherical body 19 is rotatably supported on this seat, and the support rod 15 is attached thereto. Insert the compression spring 20 and fix it with the nut 21.
Further, the vibration absorbing spring 22 is further inserted into the support rod 15 with the upper surface of the lower support metal fitting 18 as a seat, and a weight 23 having a bush made of synthetic resin having a relatively large friction coefficient is supported thereon.
It is arranged so that it slides with respect to 15.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in such a structure, if the laundry (not shown) in the washing / dehydrating tub 2 is unevenly distributed at the time of washing, the laundry is washed by the moment acting on the laundry at the time of dehydration. Dehydration tank 2
Is subjected to an eccentric force in the direction perpendicular to the outer peripheral direction, and the outer tub 4 suspended by the support rods 15 causes large vibrations in the horizontal and vertical directions. At this time, mainly the vibration absorbing spring is arranged so as not to transmit the vertical vibration of the outer tub 4 to the main body 1.
Although it is damped by the 22 and the weight 23, the vibration in the horizontal direction at the time of dehydration start cannot be sufficiently dampened, so that the vibration of the outer tub 4 cannot be absorbed, and it collides with the main body 1 or a safety switch is used. In some cases, it was activated immediately, and as a result, normal dehydration was not performed.

Therefore, the present invention prevents the washing / dehydrating tub from colliding with the main body at the time of activating the dewatering even if the laundry is unevenly distributed in the washing / dehydrating tub, and enables smooth dewatering. is there.

Means for Solving the Problems In order to solve the above problems, according to the present invention, a lower end of a support rod that suspends an outer tank is extended, and the extended portion is slid on a weight placed on a bottom plate. It is freely inserted and a friction material is interposed between the weight and the bottom plate.

Action By using the above means, horizontal vibration at the time of starting dehydration is suppressed by the vibration absorbing action of the weight, and a smooth start can be realized.

Embodiments Embodiments of the present invention will be described with reference to the accompanying drawings.

In FIG. 1, components 1 to 20 are the same as the components with the reference numerals attached to the drawings in the conventional example, so a detailed description will be omitted, and different parts will be mainly described. In the example,
A cylindrical buffer tube 24 is fixed to the lower part of the rotatable spherical body 19, and a spring receiver 25 attached to the lower part of the support rod 15 slides up and down on the inner surface of the buffer tube 24. This friction damps the vertical vibration. Reference numeral 26 denotes a bottom plate, which is attached to the bottom surface of the washing machine body 1. A weight 28 is placed on the bottom plate 26, and an extension rod 29 integrally formed by extending the lower portion of the support rod 15 is vertically slidably inserted into the weight 28. 30
Is a rubber-like friction material interposed between the weight 28 and the bottom plate 26.

Reference numeral 31 is a liquid balancer provided in the washing / dehydrating tank 2 in which a liquid (salt water) is sealed. Next, the operation of the configuration of this embodiment will be described. When washing water is put into the washing / dehydrating tub 2 and the outer tub 4 at the time of washing, the outer tub 4 descends due to its weight. This lowering brings the compression spring 20 into a compressed state. Further, during washing, the stirring blade 5 rotates and the laundry only moves by the water flow, so that the vibration of the outer tub 4 is relatively small. Therefore, the vibration is sufficiently absorbed.

On the other hand, at the time of dehydration, the washing water in the outer tub 4 is discharged to the outside, so that the weight of the outer tub 4 gradually decreases. With this decrease, the compression spring 20 is in a slightly expanded state,
Vibration of the outer tub 4 caused by uneven distribution of laundry with the start of dehydration is absorbed.

Generally, vibration during dehydration is roughly divided into horizontal vibration and vertical vibration. The horizontal vibration is damped by the sliding friction between the upper and lower spherical bodies 14 and 19 and the upper and lower support fittings 13 and 18, but if the frictional resistance is large during steady high-speed rotation, the main body 1 is affected. The energy transfer is increased and the user feels down, so the value is kept low. Therefore, when the unevenness of the laundry is very large, the horizontal vibration of the outer tub 4 cannot be sufficiently absorbed.

However, since the extension rod 29, which is the lower portion of the support rod 15, is inserted in the weight 28 placed on the bottom plate 26, the outer tub 4 starts to vibrate horizontally when the dehydration is activated, and the outer tub 4 is supported. Becomes a swinging resonance state in the horizontal direction, and when the outer tub 4 swings largely in the horizontal direction, the vibration of the weight 28 works to suppress the whirling of the outer tub 4, and a so-called vibration absorbing effect occurs. This effect is greatest when the oscillation resonance frequency of the outer tank support system and the resonance frequency of the vibration absorption system determined by the support rod 15 and the weight 28 are equal. However, in reality, the weight of the weight 28 and the support rod 15 are
Since there is a restriction on the wire diameter of the above, it is difficult to set the above two resonance frequencies to be the same. However, in the configuration of the present invention, the weight
Since 28 is mounted on the bottom plate 26, when the weight 28 swings around, friction damping occurs, so that a vibration absorbing effect occurs even if the resonance frequency is slightly different. In addition, comparing the weight 28 with a structure in which the weight 28 is hung on a support rod, it is easy to freely select the wire diameters of the weight 28 and the extension rod 29 of the support rod, and to design the two resonance frequencies mentioned above to match. .

As a result of the above, the outer tub 4 rises without colliding with the main body 1 at the time of starting dehydration, and a smooth rotation start is performed. Then, there is no inconvenience that the operation is stopped or the rinsing is performed again and then restarting is required unlike the conventional case. Further, this vibration suppressing action works effectively in the resonance state, and does not adversely affect the steady rotation.

As described above, according to the present invention, the extension rod extending below the support rod swingably supported between the outer tub and the main body is vertically slidably inserted into the weight placed on the bottom plate, Since the friction material is interposed between the weight and the bottom plate, even if dewatering is started in a state where the clothes are biased in the washing / dehydrating tank, the vibration absorbing function of the vibration absorbing system composed of the weight and the supporting rod is It appears in a wide area due to the friction damping between the weight and the bottom plate, and even if the outer tub enters a swinging resonance state during startup, vibration is suppressed and the outer tub starts up smoothly without colliding with the main body. Dehydration can be performed. Further, since it is placed on the weight or the bottom plate, the resonance frequency of the vibration absorbing system can be designed to be lower than that of the method of suspending the weight by the support rod.

[Brief description of drawings]

FIG. 1 is a side sectional view of a dewatering washing machine according to an embodiment of the present invention, FIG. 2 is an enlarged perspective view around the same weight, and FIG. 3 is a side sectional view showing a conventional dewatering washing machine. 1 …… Main body, 2 …… Washing / dehydrating tank, 4 …… Outer tank, 15 ……
Support rod, 26 ... bottom plate, 28 ... weight, 29 ... extension rod, 30 ...
… Friction material.

Claims (1)

[Claims] 1. A main body of a washing machine, an outer tub which includes a washing / dehydrating tub and is suspended in the main body via a suspension, a stirring blade for stirring the inside of the washing / dehydrating tub, a washing / dehydrating tub and stirring. An extension rod, which has a motor for driving the blades and a bottom plate on the bottom of the main body, extends the lower part of the support rod of the suspension, and is slidable on a weight that is placed on the bottom plate and a friction material is interposed between the weight and the bottom rod. Anti-vibration device for the dehydration washing machine inserted in the.