JPH0549793A - Dehydrating and washing machine - Google Patents

Abstract

PURPOSE:To restrain the vertical vibration and the amplitude of rolling of a washing receiving vessel and to decrease the generation of noise. CONSTITUTION:A dewatering and washing machine comprises a hollow closed support 9 spherically sliding on a bracket 10 provided on a washing receiving vessel 2, a sliding plate 13 which is provided on the lower end of a suspended bar 3 and capable of freely sliding inside the support 9, a suspension 19 interposed between the upper surface of the support 9 and the sliding plate 13, lubricating oil U such as oil or the like sealed in the lower portion in the support 9, and a small hole 15 which is provided on the sliding plate 13 and permits lubricating oil U to circulate therethrough. Further, suspended rod moving springs 26 for detecting the travel distance of the suspended bar 3 are provided on the upper end portions of proper number of suspended rods.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehydration washing machine, and more particularly to improvement of a vibration isolation device.

[0002]

2. Description of the Related Art In a dewatering washing machine, unbalanced vibration occurs when a high-speed rotation for dewatering is performed, particularly when the clothes are located in the dewatering / washing tub with an offset. In order to suppress this unbalanced vibration, Japanese Utility Model Publication No. 53-49988 proposes a vibration isolator having a vibration isolator with a closed structure. That is, the vibration-proof part has a closed structure (friction tube), a sliding plate is mounted in the friction tube, and a small amount of oil is enclosed, and the friction tube also moves when the washing tub vibrates vertically. At this time, the oil ascends in the groove on the inner circumference of the friction tube due to the capillary phenomenon and penetrates into the sliding plate, so that sliding between the sliding plate and the friction tube becomes smooth.

However, after the friction tube is moved downward and the suspension is compressed, when the friction tube is suddenly moved up (returned) by the repulsive force of the suspension, that is, the sliding plate is moved downward. The air in the friction pipe below the moving plate is compressed and the pressure is high, and it works in the direction to prevent the sliding plate from moving downward, and as a result, the friction pipe itself rolls, which rolls to the washing tub. It is transmitted and the whole washing tub violently rolls, causing intermittent vibration. This intermittent vibration collides with the machine frame of the washing machine, causing abnormal vibration. A so-called shredding phenomenon occurs.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to provide an anti-vibration device which suppresses the shank phenomenon.

[0005]

In a dewatering washing machine in which a washing tub is suspended by a plurality of hanging rods hanging from the upper part of a machine frame, a hollow hermetically-sealed support which is spherically slid on a bracket provided in the washing tub. A sliding plate provided at the lower end of the hanging rod and slidable in the supporting tool, a suspension interposed between the upper surface of the supporting tool and a sliding plate, and enclosed in the lower part of the supporting tool. A dewatering washing machine comprising a lubricating oil such as oil and a small hole provided in the sliding plate through which the lubricating oil can flow.

Further, a detection device having a suspension rod moving spring for detecting the amount of movement of the suspension rod is provided at an appropriate number of upper ends of the suspension rods.

[0007]

[Operation] During dehydration vibration, the support moves up and down. First, when the support tool moves downward (the sliding plate moves upward), the air in the upper space of the support tool is compressed and flows out to the outside from the gap between the suspension rod and the through hole of the support tool. In addition, it flows into the lower space through a small hole provided in the sliding plate. At this time, the downward vibrating force of the support is viscous damped by the viscous resistance of the air, so that the entire washing tub vibrates smoothly.

That is, in the case of viscous damping, the greater the downward speed of the support and the greater the amplitude, the greater the viscous resistance, and the vibration and amplitude are suppressed and the vibration is greatly damped. Further, if the vibration and the amplitude are small, the viscous resistance also becomes small, and the vibration is commensurately damped.

On the other hand, when the support tool moves upward (the sliding plate moves downward), external air flows into the upper space through the gap between the suspension rod and the through hole of the support tool, Also, the lower space is compressed by the sliding plate and the pressure tends to rise,
It flows from the small hole of the sliding plate to the upper space. Therefore, the same viscous resistance as when the support is moved downward acts to suppress the vibration and amplitude of the support.

Lubricating oil such as oil raises the inner surface by the vibration of the support and wets the sliding plate to smooth the movement of the sliding plate and keep the sliding resistance constant.

[0011]

Embodiments of the present invention will be described with reference to the drawings. 2 and 3, 1 is a machine frame of a dehydration washing machine, 2
Is a washing tub suspended and supported by four suspension rods 3 in the machine frame 1, 4 is a vibration isolator attached to the lower portion of the suspension rod 3, and 5 is dehydration rotatably supported in the washing tub 2. Although not shown, the washing tub also has a large number of dehydration holes around it. Reference numeral 6 denotes a rotary blade disposed rotatably on the bottom of the washing tub 5, and 7 denotes a power transmission mechanism 8 for the washing tub 5 and the rotary blade 6.
Drive motor connected via
Only the spinning tub 5 and the rotary blades 6 are rotated in one direction at high speed during spin-drying.

The vibration isolator 4 is as shown in FIG. 1 and will be described below. Reference numeral 9 denotes a plastic hollow hermetically-supporting tool that is spherically slid on a bracket 10 provided on the laundry receiving tub 2.
A receiving tube 9a having a lower end opening inserted thereinto, and a cap 9b detachably screwed to a lower thread portion of the receiving tube 9a via a packing 28, and a hollow hermetically-sealed support is provided below the cap 9b. An injection port 11 for injecting a lubricating oil U such as oil is provided in 9, and a screw 12 is screwed into the injection port 11 via an O-ring.

Reference numeral 13 denotes an inverted dish-shaped sliding plate made of rubber or the like, which is supported and mounted on the lower end supporting protrusion 3a of the hanging rod 3 via a washer 14, and has a central portion having a thickness 13a, On the outside of the thickness 13a, one or more small holes 15 through which the lubricating oil U can flow are formed. Further, this sliding plate 13 has an outer peripheral wall 13
By expanding b downwardly, the inner peripheral wall of the support 9 can be slid in close contact.

The lubricating oil U is the sliding plate 13 under no load.
The amount is not soaked, and the amount that fits in the cap 9b is optimal.

Reference numeral 16 denotes a flexible foot valve placed on a convex seat 13c provided on the sliding plate 13, which is made of a material such as non-woven fabric or felt that can be impregnated, and is usually a small hole of the sliding plate 13. 1
There is a gap so as not to block 5 and the outer periphery is sized so as to be in sliding contact with the inner peripheral wall of the support 9.

Numeral 17 is a washer 18 on the foot valve 16.
And a ridge spring receiver having a diameter smaller than that of the foot valve 16 and pressed by the force of a suspension 19 described later. Therefore, the spring receiver 17, the foot valve 16, the sliding plate 1
3 and 3 move integrally with each other in association with the movement of the suspension rod 3.

Reference numeral 19 designates the upper surface of the support 9 and the spring receiver 1.
When there is no laundry (hereinafter referred to as load) or water in the washing tub 5 due to the suspension interposed between the sliding members 7, the sliding plate 13 is located under the support 9. If there is a load or the like, it is compressed by its weight, so that the sliding plate 13 slides in the support 9 and is positioned above.

Reference numeral 20 denotes a detection device provided on the upper portion of the suspension rod 3 for detecting the amount of movement of the suspension rod, which will be described below. Reference numeral 21 denotes an insulating support member coaxially fixed to the upper end of the hanging rod 3 by a pin 22, 23 a core fixed to the outer periphery of the support member 24, and 24a24b supported on a spherical seat 25 of the machine casing 1. With the pair of upper and lower hanging tools, the upper portion of the support 24a is pressed down by the collar 21a of the support 21, and the support 24b
Slide on 1. 26 is the pair of upper and lower suspenders 24a,
This is a spring interposed between 24b.
The support 21 is urged upward by.

Therefore, the load of the laundry receiving tub 2 acts so as to move the suspension bar 3 downward via the suspension 19 and the sliding plate 13, and thereby the support 21
Moves downward against the bias of the spring 26.

Reference numeral 27 denotes a coil fixed to the lower hanging member 24b so as to be located around the core 23, and the core 23 causes the coil 27 to move as the support 21 moves downward.
It moves inside, and the inductance of the coil 27 changes accordingly. Although not shown in the drawing by utilizing this change in inductance, the suspension rod 3 is controlled by a control circuit including a microcomputer.
Determine the amount of movement. That is, as a result, the weight of the load is measured.

FIG. 4 is a view showing another embodiment of the hollow hermetically-sealed support 9, in which the receiving tube 9a and the cap 9b for closing the lower end opening of the receiving tube 9a are attached differently. That is, an annular groove 29 having a downward opening is formed on the outer periphery of the lower end of the receiving tube 9a, the upper end of the cap 9b is inserted into the annular groove 29, and then heat sealing is performed to fix the both. Alternatively, the cap 9b is adhered and fixed by applying an adhesive when the cap 9b is inserted.

FIG. 5 is a view of another embodiment of the cap 9b in which the injection port is eliminated. Therefore, the lubricating oil U is removably screwed to the lower threaded portion of the receiving tube 9a via the packing 28 while the lubricating oil U is put in the cap 9b in advance.

In the above structure, when a load is applied to the washing tub 5, the load is applied to the suspension 1
9. It acts so as to move the suspension rod 3 downward via the sliding plate 13, so that the support body 21 moves the spring 2
Move downwards against 6 bias. As the support 21 moves downward, the core 23 moves inside the coil 27, and the inductance of the coil 27 changes accordingly. Then, the amount of movement of the suspension rod 3 is determined by utilizing this change in inductance. That is, the weight of the load is measured.

Next, the operation of the vibration isolator 4 will be described by way of an example when dehydration occurs, in which vibrations are noticeable. At the time of spin-drying, the spin-drying and washing tub 5 itself rotates in one direction at a high speed, so that the washing receiving tub 2 vibrates vertically and rolls. Therefore, the suspension rod 3 as a whole performs rotational vibration with a certain amplitude. Since the center of the hanging rod draws the vibration locus A in FIG. 3, the support tool 9 also rotates, and this rotational centrifugal force is applied, so that the lubricating oil U rises along the inner peripheral wall of the support tool 9 and wets the sliding plate 13. The sliding motion of the moving plate 13 is made smooth and the sliding resistance is kept substantially constant.

Further, since the sliding plate 13 vertically vibrates (slides) in the support 9, the ascending lubricating oil U passes through the small hole 15 and is replenished to the foot valve 16. Particularly, when the sliding plate moves downward, the lower space inside the support tool under the sliding plate 13 is compressed and the pressure rises, so that the lubricating oil U flows from the small hole 15 to the foot together with the air in the lower space. It is supplied to the valve. Since the foot valve 16 is always in sliding contact with the inner peripheral wall of the support tool 9, the lubricating oil is also supplied from the foot valve 16.

Since the lubricating oil is supplied to the sliding plate 13 at every dehydration, the sliding resistance of the sliding plate hardly changes, and the abrasion is very little, thus improving the durability and the vibration proofing. It is possible to prevent functional deterioration.

The foot valve 16 is pressed by the pressure in the upper space when the sliding plate 13 moves upward to close the small hole 15, so that the air in the upper space acts on the suspension rod 3 and the support 9. Flows out from the sliding part of. On the contrary, when the sliding plate 13 moves downward,
The lower space is compressed and the compressed air opens the foot valve, so that the air in the lower space escapes from the small holes 15 into the upper space.

Therefore, the viscous resistance of the air when the sliding plate 13 moves up and down can be balanced, and as a result, the vibration and amplitude of the support 9 can be suppressed as described in the section of the action. I can. In particular, the shank phenomenon can be suppressed by reducing the viscous resistance of the sliding plate when it is moving downward.

Further, the detection device 20 provided on the suspension bar 3
Since the spring 26 is attached to the spring 26, the action of the spring 26 causes a so-called intermittent vibration in which the amplitude of the washing tub 2 largely changes in a short cycle. However, since this is absorbed by the vibration isolator of the present invention, The occurrence of intermittent vibration can be suppressed.

[0030]

As described above, according to the present invention, the amplitude of vertical vibration and lateral vibration of the laundry receiving tub can be suppressed. As a result, the generation of noise could be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a detection device and a vibration isolation device of the present invention.

FIG. 2 is a plan view of the dehydration washing machine of the present invention with the top plate removed.

FIG. 3 is likewise a longitudinal sectional view of an essential part.

FIG. 4 is a cross-sectional view of essential parts showing a second embodiment of the support of the vibration isolator of the present invention.

FIG. 5 is a cross-sectional view of essential parts showing a third embodiment of the support of the vibration isolator of the present invention.

[Explanation of symbols]

 1 Machine Frame 2 Laundry Tank 3 Suspension Bar 4 Vibration Isolator 5 Dehydration Washing Tank 9 Hollow Sealing Support 10 Bracket 13 Sliding Plate 15 Small Hole 16 Foot Valve 19 Suspension 20 Detector 26 Spring U Lubricating Oil

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location F16F 13/02 B 9138-3J A 9138-3J (72) Inventor Takayo Kuraseko Keihan, Moriguchi City, Osaka Prefecture 2-18, Hondori Sanyo Electric Co., Ltd.

Claims (2)

[Claims] 1. A dewatering washing machine in which a laundry receiving tub is suspended by a plurality of hanging bars hanging from an upper part of a machine frame, and a hollow hermetically-supporting tool that is spherically slid on a bracket provided in the laundry receiving tub, and the suspension. A sliding plate provided at the lower end of the rod and slidable in the support, a suspension interposed between the upper surface of the support and the sliding plate, and lubrication of oil or the like enclosed in the lower part of the support. Oil and provided on the sliding plate,
A dewatering washing machine characterized by comprising a small hole through which lubricating oil can flow. 2. The dehydration washing machine according to claim 1, wherein an appropriate number of the upper ends of the hanging rods are provided with a detecting device having a hanging rod moving spring for detecting a moving amount of the hanging rods. Machine.