JPS62122698A - Vibration-proof apparatus of washing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a washing machine, and more particularly to a vibration isolating device for a washing machine that prevents vibrations and abnormal noises during spin-drying.

[Background of the invention]

In a washing machine that elastically suspends and supports a dehydration tank, a hanging rod is used as a member for supporting the dehydration tank on the outer frame of the main body,
A vibration isolating device in which a vibration isolating elastic member such as rubber is inserted into this suspension rod is shown in, for example, Japanese Utility Model Application No. 57-196480. It is possible to effectively prevent vibrations and abnormal noises from occurring when the dehydration tank rotates at high speed.

However, at the beginning of the dewatering rotation, that is, at low speed rotation when an unbalanced load is generated in the dehydration tank, there is a tendency for large vibrations to be insufficiently damped, and in such a case, vibrations and abnormal noises are likely to occur.

[Purpose of the invention]

The present invention was made as a result of various studies in order to solve the above-mentioned problems of the prior art, and its purpose is to prevent vibrations not only during steady rotation of dehydration but also at the initial stage of rotation of dehydration. Another object of the present invention is to provide an improved vibration isolating device for a washing machine that can effectively prevent the generation of abnormal noise.

[Summary of the invention]

In order to achieve the above object, the vibration isolator of the present invention provides a washing machine in which a dehydration tank is elastically suspended from the outer frame of the main body, in which a hanging rod that elastically suspends and supports the dehydration tank is rotated during dehydration rotation. It is characterized by being composed of a large-diameter portion that comes into sliding contact with the vibration-proofing elastic member fitted into the hanging rod at the initial stage of the process, and a small-diameter portion that comes into sliding contact with the above-mentioned vibration-proofing elastic member during steady rotation of dehydration. That is.

[Embodiments of the invention]

Hereinafter, the present invention will be explained based on an example of FIGS. 1 to 3, taking as an example a case where the present invention is adopted in a fully automatic washing machine.
Fig. 1 is a longitudinal sectional view of the main part of the present invention (vibration isolating device 2) at the initial stage of washing and dehydration rotation, Fig. 2 is a longitudinal sectional view of the same main part during steady rotation of dehydration, and Fig. 3 is the apparatus of the present invention. FIG. 2 is a vertical cross-sectional view showing the overall internal structure of a washing machine equipped with a washing machine.

In FIG. 3 showing the overall internal structure of the washing machine, 1 is an outer frame of the main body, and inside the outer frame 1 of the main body is a vibration isolator 2 which will be described later.
The outer tub 3 for washing and dehydrating is elastically supported in suspension, and vibration isolators 2 for suspending and supporting the outer tub 3 are attached to four corners of the outer frame 1 of the main body. In addition, an inner tank 4 for washing and dehydration is attached to the inside of the outer tank 3.
A stirring blade 5 is attached to the center of the bottom. 6 is a motor attached below the outer tank 3;

The rotation of the inner tank 4 and the rotation of the stirring blades 5 are selectively performed via the belt 7, clutch 8, and magnet 9. A top cover 10 is attached to the upper part of the main body outer frame 1, and a panel 11 containing various electrical components and a lid 12 are attached to the top cover 10. 13 is outer tank 3
The water in the outer tank 3 is drained to the outside via a drain valve 14 and a drain hose 15.

Here, details of the vibration isolator 2 that elastically suspends and supports the outer tank 3 with respect to the main body outer frame 1 will be explained based on FIGS. 1 and 2. The lower end of the hanging rod 16 having a circular cross section teeth,
The compression spring 1 is bent between a pair of upper and lower spring receivers 17 and 18 which are bent into a cross-sectional shape and are fitted into the hanging rod 16.
9 is interposed therein, and a vibration isolating rubber 20 and a slider 21 are inserted into the hanging rod 16 and positioned above the upper spring receiver 17.
By covering the hanging rod support part 3a of the outer tank 3 on 1a,
As shown in FIG. 3, the outer tank 3 is elastically suspended from the main body outer frame 1 via a support piece (not shown) attached to the upper end of the hanging rod 16. Therefore, in the illustrated embodiment, the hanging rod 16 that elastically suspends and supports the outer tank 3 with respect to the main body outer frame 1 is
6, and a small diameter portion 16b having a dimension d2 that comes into sliding contact with the vibration isolating rubber 20 during steady rotation of dehydration. Furthermore, the large diameter portion 16a of the hanging rod 16 has a cross-sectional shape as shown in FIG.

It may be formed into a cross shape, and as shown in FIG.
It may also be formed into an oval shape.

The present invention has the above-mentioned configuration. Firstly, the operation of the illustrated embodiment will be explained. During washing, the washing/dehydration tubs 4 and 3 are filled with washing water, so due to their weight, The inner and outer tanks 4, 3 are in a lowered state against the compression spring 19. Therefore, in this case, the vibration isolator 20 forming a part of the vibration isolator 2 is attached to the hanging rod as shown in FIG. It is in a fitted state with the large diameter portion 16a (dimension d) of No. 16.

Further, even when washing is completed and the washing water in the inner and outer tubs 4, 3 is drained and the dehydration operation is started, the vibration isolating rubber 2o is still connected to the large diameter portion 16a of the hanging rod, as shown in FIG. It is in the inserted state. In other words, even at the initial stage of spin-drying rotation, that is, during low-speed rotation when an unbalanced load is likely to occur in the inner and outer washing and spin-drying tubs 4°3, the vibration isolating rubber 20 has a large tightening margin with respect to the large diameter portion 16a of the hanging rod. Since they are fitted together, the unbalanced load on the inner and outer tanks 4, 3 described above is absorbed by the large tightness between the vibration isolating rubber 20 and the large diameter portion 16a of the hanging rod, and vibrations at the initial stage of spin-drying are absorbed. It is possible to effectively prevent the occurrence of abnormal noises.

When the washing water in the inner and outer washing and dewatering tubs 4 and 3 is removed to a certain extent and the weight of the inner and outer tubs 4 and 3 becomes lighter, the inner and outer tubs 4 and 3 rise due to the action of the compression spring 19 returning to their original state, and along with this, the prevention The swinging rubber 20 slides upward along the hanging rod 16, and finally fits into the small diameter portion 16b (dimension dz) of the hanging rod, as shown in FIG. In other words, during steady rotation of dehydration, that is, when the inner tank 4 rotates at high speed, the vibration isolating rubber 2o supporting the outer tank 3 has a small diameter of 20 and a diameter of the suspension rod of 6b. It is absorbed with a small tightening margin between the small portion 16b, and as in the conventional case, it is possible to effectively prevent vibrations and abnormal noises from occurring during steady rotation of dewatering. In addition, hanging rod 1
If all the outer diameter dimensions of the inner tank 4 are taken as the dimension di of the large diameter portion 16a, although it is possible to effectively prevent the occurrence of vibrations and abnormal noises at the initial stage of the dehydration rotation, the rotation speed of the inner tank 4 increases, which is the so-called dehydration steady state. During rotation, the vibration isolating rubber 20 and hanging rod 16 (
Since the tightening between the two dimensions (dz) is too large, it actually causes vibration and abnormal noise.

〔Effect of the invention〕

The present invention is as described above, and as is clear from the description of the illustrated embodiments, according to the present invention, it is possible not only during the steady rotation of dehydration, that is, when the dehydration tank is rotating at high speed, but also during the initial stage of the dehydration rotation, i.e. It is possible to obtain an improved vibration isolating device for a washing machine that can effectively prevent the generation of vibration and abnormal noise even during low speed rotation when an unbalanced load is likely to occur in the dehydration tank.

[Brief explanation of drawings]

Figures 1 to 3 show an embodiment of the present invention, and Figure 1 shows the main part of the present invention (vibration isolating device 2) at the initial stage of washing and spin-drying.
FIG. 2 is a vertical cross-sectional view of the main parts of the same during steady rotation of dehydration, FIG. 3 is a vertical cross-sectional view showing the overall internal structure of the washing machine equipped with the device 2 of the present invention, FIG. FIG. 5 is an end view showing a modified example of the hanging rod indicated by reference numeral 6 in FIGS. 1 to 3. 1... Body outer frame, 2... Vibration isolator, 3... Washing
Dehydration inner tank, 3a...Hanging rod support part 54...Washing/dehydration outer tank, 16...Hanging rod, 16a...Hanging rod large diameter part (dimension dz), 16b...Hanging rod diameter Small part (dimensions dz), 17 and 18... Spring receiver, 19... Compression spring, 20...
・Vibration-proof rubber, 21...Slider, 21a...Slider spherical surface Fig. 1 Fig. 2521 Fig. 3

Claims (1)

[Claims] 1. In a washing machine in which a dehydration tank is elastically suspended and supported on the outer frame of the main body, a hanging rod that elastically suspends and supports the dehydration tank is fitted with a bar inserted into the hanging rod at the initial stage of spin-drying rotation. 1. A vibration isolator for a washing machine, comprising a large diameter portion that comes into sliding contact with a vibration elastic member, and a small diameter portion that comes into sliding contact with the vibration isolating elastic member during steady rotation for dewatering.