JPH0254115B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dehydrating washing machine, and more particularly to a dehydrating washing machine suitable for reducing lateral vibrations of an outer tub caused by unbalanced objects to be dehydrated during dehydration.

In a dehydrating washing machine, the objects to be dehydrated are unevenly distributed in the dehydrating tank, resulting in an imbalance, which causes whirling vibration of the dehydrating tank. There are two resonance points in a dehydrating washing machine, the primary being translational vibration and the secondary being mainly rolling vibration.

In order to suppress this vibration, the vibration isolating device in the conventional dehydrating washing machine has a primary damping, that is, a horizontal damping, a sliding friction between the slider 21 and the outer tub support 22, and a secondary damping, as shown in FIG. That is, the vertical direction is provided by sliding friction between the slider 21 and the hanging rod 23. Recent efforts have been made to make washing machines lighter by using plastic for their outer tubs and spin-drying tubs. As a result, the horizontal frictional force, which had been previously applied by the frictional force due to the weight of the hanging portion, was reduced. Furthermore, due to the increase in the eccentric center of gravity due to the decrease in total mass and the decrease in damping force, the primary resonance point often cannot be passed due to the unbalanced laundry that occurs, resulting in a high activation rate of the safety switch.

The purpose of the present invention is to increase the horizontal damping force, which has been reduced due to the reduction of the weight of the hanging part, without increasing the weight, and to prevent lateral vibration of the outer tank during dewatering even if there is an imbalance in the object to be dewatered. Our objective is to provide a washing machine that is efficient at dehydrating.

The present invention is characterized not only by the sliding friction due to weight, but also by interposing a slider presser between the outer tank support part and the slider, so that the outer tank support part is held down by the slider and slider presser. It is something. That is, a dehydration tank with a pulsator installed in the center of the bottom, an outer tank that encloses this dehydration tank, a slider that slides the outer tank on a spherical surface on a hanging rod and an outer tank support, and an anti-vibration spring that biases this slider. In a dehydrating washing machine consisting of an outer frame supported through a slider, a hook portion is formed on the slider facing the spherical portion, and the outer tub support portion is pressed between the hook portion and the outer tub support portion. The structure includes a slider presser.

An embodiment of the present invention will be described below with reference to FIG. 1 and FIGS. 3 to 7.

In FIG. 1, 1 is an outer frame of a dehydrating washing machine, and 3 is a dehydrating tank, which is installed concentrically within an outer tub 2. There are many dehydration holes 4 on the side of the dehydration tank 3.
Together with the pulsator 5 in the center, it plays the role of washing and dewatering. 6 is a transmission, 7 is a motor, and these are fixed to the lower surface of the outer tank 2. Pulleys 8 and 9 transmit the rotation of the motor 7 to the transmission 6 via the V-belt 10. Also, the outer tank 2 has a hanging rod 1
4. Vibration-proof support is provided from the upper part of the outer frame 1 via a slider 16, a compression spring 17, etc. 12 is a spherical seat, 13 is a stopper, 15 is an outer tank support portion, and 18 is a spring seat.

As shown in FIGS. 3 and 4, the slider 16 has a spherical surface portion 16 that slides spherically on the outer tank support portion 15.
a, a cylindrical portion 16b on which the hanging rod 14 slides, and a hook portion 16c formed at the tip of this cylindrical portion 16b, and is molded from synthetic resin such as nylon. A slider presser 19 formed in the shape of a leaf spring is interposed between the hook portion 16c of the slider 16 and the outer tank support portion 15, and the slider presser 19 is made of a material different from the material of the support portion 15, for example, nylon. be done. Moreover, since this slider presser 19 is formed into a cup shape and is provided with a notch 19a in the radial direction as shown in FIG. 5, the inner diameter can be increased.

In assembling, first the slider holder 19 and the slider 16 are arranged so as to sandwich the outer tank support part 15 as shown in FIG. By pushing the slider holder 19 in the direction of the arrow, the slider holder 19 slides along the tapered part attached to the slider 16 while enlarging its inner diameter, and returns to its original inner diameter when it passes the hook part 16c. Fixed as shown. The free length l of the slider holder 19 is made larger than the assembled length l'. Therefore, the slider holder 19 changes from a free state to a compressed state, and the slider holder 19 itself acts as a spring.
The outer tank support part 15 is attached to the slider 16 and the slider holder 1.
9 allows it to be pressed from above and below.

At this time, the sliding friction force is given by the outer tank's own weight and the spring force of the slider presser, and the frictional force is larger than the conventional case where only the outer tank's own weight is used.

Also, by changing the length of the cylindrical portion 16b of the slider 16, the assembled length l' of the slider holder 19 can be changed,
Alternatively, by changing the shape and material of the slider holder 19 and changing the spring stiffness, the surface pressure, that is, the sliding friction force acting between the outer tank support part 15, the slider 16, and the slider holder 19 can be arbitrarily changed. , can provide appropriate damping to the system.

6 and 7 show other embodiments of the present invention, and the same reference numerals as in FIGS. 3 and 4 indicate the same parts.

The slider presser 19 has a cylindrical portion 9b and a spherical portion 19c.
Since it is made of chisel, it is easy to process, and
Since the spherical portion 19c of the slider holder 19 and the outer tank support portion are in contact with each other through spherical surfaces having the same radius, a large contact area can be obtained, and therefore a damping effect can be smoothly provided. Also, slider presser 1
9 is the assembled length from the free length l by the slider 21.
Since it is compressed to l', the pressing force against the outer tub support part 15 due to the spring action is approximately constant regardless of whether it is being washed or dehydrated, and does not affect the biasing force of the vibration isolating spring 17. In other words, it is possible to always apply a constant frictional force, and the slider presser 1
A notch 19a is provided at 9 so that it can be assembled later, making it easy to assemble.

According to the present invention, by inserting the slider presser between the slider and the outer tank support part, a substantially constant sliding damping force can be applied in the horizontal direction regardless of the weight of the hanging part. This is effective in reducing the lateral vibration of the dehydration tank caused by unbalance of the material to be dehydrated during dehydration.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a dehydrating washing machine showing an embodiment of the present invention, Fig. 2 is a sectional view of a conventional vibration isolator, and Fig. 3 is a sectional view of a conventional vibration isolator.
4 and 4 are enlarged cross-sectional views of the main parts of FIG. 1, FIG. 3 is a view before inserting the slider holder, FIG. 4 is a view after inserting the slider holder, FIG. 5 is a front view of the slider holder, and FIG. The figure is an enlarged sectional view showing another embodiment of the present invention, and FIG. 7 is a front view of the slider presser. 14... Hanging rod, 15... Outer tank support part, 16... Slider, 16a... Spherical part, 16b... Cylindrical part, 16c
...Hook part, 17... Anti-vibration spring, 19... Slider holder.

Claims (1)

[Claims] 1 A dehydration tank with a pulsator installed in the center of the bottom, an outer tank that encloses this dehydration tank, a slider that slides the outer tank on a spherical surface on a suspension rod and an outer tank support, and a vibration-proof spring that biases the slider. In a dehydrating washing machine comprising an outer frame supported through the slider, a hook portion is formed on the slider facing the spherical portion, and the outer tub support portion is pressed between the hook portion and the outer tub support portion. A dehydrating washing machine characterized by having a slider presser interposed therebetween.