JP3101519B2 - Dehydration washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a dehydrating washing machine.

[0002]

2. Description of the Related Art In a spin-drying washing machine, when clothes are biased in the spin-drying tub in the spin-drying tub, the spin-drying tub is rotated at high speed for spin-drying. Vibrate. In order to suppress this unbalanced vibration, a vibration isolator as shown in FIG. 5 has been put to practical use.

In this vibration isolator, a receiving tube 32 having a lower end opening that slides spherically is provided on the lower surface of a bracket 31 of a washing tub 30, and a suspension rod 33 attached to an upper portion of the machine frame of the washing machine is provided in the receiving tube 32. And a sliding body 34 that slides against the inner wall of the receiving tube 32 is attached to the lower end of the hanging rod 33, and an impregnated body 35 such as felt impregnated with oil is disposed above the sliding body 34. A suspension 36 is interposed between the impregnated body 35 and the sliding body 34 and the upper inner wall in the receiving tube 32.

When the washing and spinning tub rotates at a high speed during spinning, the washing tub 30 vibrates up and down and rolls.
The sliding body 34 moves up and down in the receiving tube 32. Then, when the sliding body 34 is moved upward, the compressed air gradually leaks from the penetrating portion of the suspension rod 33 of the receiving pipe 32, and a damper action by the air resistance works, so that vibration is prevented. When the sliding member 34 is moved downward, the movement is reversed, and the vibration is similarly prevented.

[0005]

However, recently, when the capacity of the washing machine is increased due to the increase in the capacity of the washing machine and the washing weight, if the frequency generated in the vibration system at the time of spin-drying and the natural frequency of the vibration isolating system match, the vibration is reduced. The amplitude of the system becomes extremely large. For example, there is a case where the washing tub 30 vibrates greatly up and down, and the washing tub 30 collides with the exterior top plate or the like, and the entire washing machine is largely moved.

[0006] In order to suppress such amplitude, the hanging rod 3
It is conceivable to make the gap between the support tube 3 and the hanging rod through hole of the receiving tube 32 smaller. In this case, however, the air in the receiving tube 32 does not escape and the receiving tube 32 becomes an air spring, and the washing tub 30 Violently rolls, causing intermittent vibration, at which point the washing tub 30 collides with the exterior.

When the washing and dewatering tub rotates at a high speed during spin-drying, the sliding body 34 reciprocates violently up and down, so that the oil impregnated in the impregnating body 35 is scattered, and the oil gradually comes into contact with the sliding body 34 and the receiving pipe. It falls between the 32 inner walls and soils the floor. Furthermore, in long-term use, a large amount of oil may drop and run out of oil, increasing the frictional resistance of the sliding body 34, abrading the sliding body 34 and deteriorating the vibration isolation performance.

An object of the present invention is to provide a dehydration washing machine in which the vibration damping performance of a vibration damping device is improved and oil is prevented from dropping to the floor or running out of oil.

[0009]

According to a first aspect of the present invention, there is provided a laundry receiving tub in which a vibration isolating mechanism is mounted below a hanging rod mounted on an upper portion of a machine frame, and a washing and dewatering tub is provided inside. In the dehydration washing machine, which is suspended and supported on the hanging bar via the vibration isolating mechanism, the vibration isolating mechanism slides on a lower surface of a bracket provided in the washing receiving tub, and receives the lower end opening through which the hanging bar is inserted. A pipe, a sliding body mounted on the lower end of the hanging rod in the receiving pipe, and sliding on an inner wall of the receiving pipe; and a suspension interposed between the sliding body and an upper inner wall in the receiving pipe. And a cap fixed to a lower portion of the receiving tube and closing a lower end opening of the receiving tube, and a cap formed on the cap, wherein the sliding body moves upward in the receiving tube,
Formed between the sliding body and the cap in the pipe
The outside air flows into the lower space, and the sliding body
Moves downward, the compressed air generated by the sliding body
And a small hole that flows out from the space to the outside .

Further, according to a second aspect of the present invention, an anti-vibration mechanism is attached to a lower portion of a hanging rod mounted on an upper portion of a machine frame, and a washing receiving tank in which a washing and dewatering tub is provided is connected via the anti-vibration mechanism. In the dehydration washing machine suspended and supported by the hanging bar, the anti-vibration mechanism slides on a lower surface of a bracket provided on the washing tub, and a receiving tube having a lower end opening through which the hanging bar is inserted, and in the receiving tube. A sliding body attached to the lower end of the hanging rod and sliding on the inner wall of the receiving tube, and a suspension interposed between the sliding body and an upper inner wall in the receiving tube;
An impregnating body that impregnates the oil or the like that smoothly slides the sliding body, a cap that is fixed to a lower portion of the receiving pipe and closes a lower end opening of the receiving pipe, and a small hole formed near the center of the cap. And a receiving portion formed on the inner wall of the cap and around the small hole to receive oil or the like from the impregnated body.

According to a third aspect of the present invention, in the configuration of the first or second aspect, the cap is inserted into the receiving tube in a state in which a peripheral rising portion of the cap is fitted in a downward groove around a lower end of the receiving tube. Are fixed by heat welding.

[0012]

According to the construction of the first and second aspects, at the time of dehydration oscillation,
The receiving tube moves up and down. First, when the receiving pipe moves down (the sliding body moves up), the air in the upper space in the receiving pipe is compressed, and the air flows out from the gap between the hanging portion and the sliding portion between the through-hole of the receiving pipe. Outside air flows into the lower space from a small hole of a cap attached to a lower portion of the receiving tube. As a result, the downward vibration force of the receiving tube is viscously attenuated due to the viscous resistance of the air to both spaces, and the entire washing tub vibrates smoothly downward.

That is, in the case of viscous damping, the greater the speed and amplitude of the downward movement of the receiving tube, the greater the viscous resistance is, the more the vibration amplitude is suppressed, and the greater the damping. Also, if the vibration and amplitude are small, the viscous resistance is also small, and the vibration is damped accordingly.

On the other hand, when the receiving tube moves up (the sliding body moves down), external air flows into the upper space in the receiving tube from the gap between the sliding portion of the hanging rod and the through hole of the receiving tube. In the lower space, the compressed air by the sliding body flows out of the cap through the small hole. As a result, similarly to the downward movement of the receiving tube, the vibrating force upward of the receiving tube is viscously attenuated due to the viscous resistance of the air to both spaces, and the entire washing tub vibrates smoothly upward.

In the second aspect of the present invention, a receiving portion is formed around the small hole on the inner wall of the cap for closing the lower end opening of the receiving tube. Therefore, even if the washing and dewatering tub rotates at a high speed during dehydration and the sliding body reciprocates violently up and down, the oil impregnated in the impregnating body accumulates in the receiving portion without falling to the floor.

The oil accumulated in the receiving portion rises on the inner surface by the vibration of the receiving tube to wet the sliding body, smoothen the movement of the sliding body, and keep the sliding resistance constant. Further, the wear of the sliding body is extremely reduced, and the durability of the sliding body and thus the vibration isolator is improved.

According to the third aspect of the present invention, the receiving tube and the cap are securely connected to each other. Therefore, even if water spilled from the washing tub reaches the vicinity of the receiving tube, water does not enter the receiving tube from the connection portion. This is not desirable, and the durability of the vibration isolator is also improved in this respect.

[0018]

1 and 2 show the entire structure of a dehydrating washing machine according to an embodiment of the present invention. 1 is a machine frame of a dehydration washing machine, 2 is four hanging bars mounted on the upper four corners of the machine frame 1, 4 is four vibration isolation mechanisms mounted on lower ends of these bars 2, and 3 is these The washing tub 5 suspended and supported in the machine frame 1 by the hanging bar 2 via the vibration isolation mechanism 4 is a washing and dewatering tub rotatably supported inside the washing tub 3. The dehydration tank has a number of dehydration holes around it. Reference numeral 6 denotes a rotating blade rotatably disposed at the bottom of the washing and dewatering tub 5. Reference numeral 7 denotes a drive motor connected to the washing and dewatering tub 5 and the rotating wing 6 via a power transmission mechanism 8. During washing, only the rotary blade 6 is rotated, and at the time of spin-drying, both the washing and dewatering tub and the rotary blade 6 are rotated in one direction at high speed.

FIG. 3 shows the details of the vibration isolation mechanism 4. Reference numeral 9 denotes a plastic hollow sealing support that slides spherically on the lower surface of a bracket 10 provided integrally with the washing tub 3. The support 9 is provided with a receiving tube 9a having a lower end opened through the lower part of the hanging rod 2 and a cap 9b which is detachably screwed to a lower end thread portion of the receiving tube 9a to close the lower end opening of the receiving tube 9a. Consists of A small hole 11 through which air can flow in and out is formed near the center of the lower portion of the cap 9b, and a concave receiving portion 12 is formed around the small hole 11 so as to surround the small hole 11. I have. The receiving portion 12 receives the lubricating oil from the impregnated body (described later).

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 support projection 3a of the suspension rod 2 via a washer 14 in the receiving tube 9a. The sliding plate 13 has a thicker portion at the center, and expands the outer peripheral wall 13a downward and slides in close contact with the inner peripheral wall of the receiving tube 9a.

Reference numeral 15 denotes an impregnated body made of felt or the like disposed on the sliding plate 13. The impregnated body 15 is impregnated with lubricating oil and has a size such that its outer periphery slides on the inner peripheral wall of the receiving tube 9a. The sliding plate 13 slides smoothly on the receiving tube 9a by the oil in the impregnated body 15.

Reference numeral 16 denotes a spring receiver provided on the impregnated body 15 and having a smaller diameter than the impregnated body 15. The spring receiver 16 is pressed by the force of a suspension described later. Accordingly, the spring receiver 16, the impregnated body 15, and the sliding plate 13 are integrally moved with the hanging bar 2.

Reference numeral 17 denotes a suspension interposed between the upper inner wall in the receiving pipe 9a and the spring receiver 16. The suspension 17 is extended when there is no laundry or water in the washing and dewatering tub 5, The sliding plate 13 is located below the receiving tube 9a. If there is laundry or the like, the suspension 17 is compressed by its weight, and the sliding plate 13 slides inside the receiving tube 9a and is located above.

The operation of the anti-vibration mechanism 4 will be described by taking as an example the case of spin-drying in which vibrations are noticeable. During dehydration, the washing and dewatering tub 5 itself rotates at a high speed in one direction, so that the washing tub 3 vibrates up and down and rolls. Then, the receiving tube 9a moves up and down.

First, when the receiving tube 9a moves down (sliding plate 1
3 moves upward), the air in the upper space 18 in the receiving pipe 9a is compressed, the air flows out to the outside from the gap 19 in the sliding portion between the hanging rod 2 and the through hole of the receiving pipe 9a, and the lower space Outside air flows into 20 through the small hole 11 of the cap 9b attached to the lower part of the receiving tube 9a. Thereby, both spaces 18,
Due to the viscous resistance (double damper effect) of air with respect to 20, the downward vibrating force of the receiving tube 9a is viscously attenuated, and the entire washing tub 3 vibrates smoothly downward.

In other words, in the case of viscous damping, the greater the speed and amplitude of the downward movement of the receiving tube 9a, the greater the viscous resistance is, the more the vibration amplitude is suppressed, and the greater the damping. Also, if the vibration and amplitude are small, the viscous resistance is also small, and the vibration is damped accordingly.

On the other hand, when the receiving tube 9a moves up (the sliding plate 13 moves down), the upper space 18 in the receiving tube 9a is
External air flows in from a gap 19 in a sliding portion between the suspension rod 2 and the through hole of the receiving pipe 9a, and in the lower space 20, compressed air from the sliding plate 13 flows out of the small hole 11 of the cap 9b to the outside. . As a result, similarly to the downward movement of the receiving tube 9a, the viscous resistance (double damper effect) of the air to the two spaces 18 and 20 causes the upward vibration force of the receiving tube 9a to be viscously attenuated, so that the entire washing tub 3 becomes smooth. Vibrates upward.

Therefore, even if the washing machine has a large capacity and the washing weight has increased recently, it is possible to remarkably prevent the washing tub 3 from significantly vibrating up and down.
(Not shown in the drawing) can be suppressed from moving largely by the entire washing machine.

The supply of oil to the sliding plate 13 is performed by the oil impregnated body 15 constantly sliding on the inner wall of the receiving pipe 9a. Since the receiving portion 12 is formed on the inner wall of the cap 9b for closing the lower end opening of the receiving tube 9a and around the small hole 11, the washing and dewatering tub 5 is
The oil impregnated in the impregnating body 15 accumulates in the receiving portion 12 without dropping to the floor even if the rotor rotates at high speed and the sliding plate 13 reciprocates violently up and down.

As shown in FIG. 1, the suspension rod 2 and the support 9 also generate a rotational vibration along a vibration trajectory A, whereby the oil accumulated in the receiving portion 12 is subjected to a rotational centrifugal force and the receiving tube 9 is rotated.
a Ascends along the inner peripheral wall to wet the sliding plate 13, smoothes the movement of the sliding plate 13, and keeps the sliding resistance constant. Also,
The wear of the sliding plate 13 is extremely reduced, and the durability of the sliding plate 13 and thus the vibration isolating mechanism 4 is improved.

In this case, since the oil accumulated in the receiving portion 12 follows the inner peripheral wall of the receiving tube 9a due to the rotational centrifugal force, the oil may fall downward from the small hole 11 at the center of the receiving portion 12. There is no.

FIG. 4 shows another embodiment of the anti-vibration mechanism 4, and only the parts different from the above embodiment will be described. Receiving pipe 9
A downward groove 21 is formed around the lower end of a, and the peripheral rising portion of the cap 9b is fitted into the groove 21. In this fitted state, the cap 9b is fixed to the receiving tube 9a by heat welding. Alternatively, an adhesive is applied at the time of fitting, and the cap 9b is attached to the receiving tube 9a.
Adhesively fixed. Therefore, even if the receiving tube and the cap are securely connected to each other and the water spilled from the washing tub 3 reaches the vicinity of the receiving tube 9a, the water does not undesirably enter the receiving tube 9a from the above-mentioned connection portion. Also in this respect, the durability of the vibration isolation mechanism 4 is improved.

In each of the above embodiments, when the sliding plate 13 is made of an oil-less metal or a member coated with Teflon, the sliding plate 13 moves smoothly without the impregnated body 15 impregnated with oil. The impregnation body 15 can be made unnecessary. Since the oil does not drop, the receiving portion 12 for receiving the oil can be unnecessary.

[0034]

According to the dehydrating washing machine of the present invention, the use of a vibration damping mechanism having a double damper effect can improve the vibration damping performance of the vibration damping mechanism. Even so, it is possible to remarkably prevent the laundry receiving tub from vibrating greatly and colliding with the exterior top plate or the like.

Further, the oil in the impregnating body for smooth sliding of the sliding body in the vibration isolating mechanism falls to contaminate the floor, and the running resistance of the sliding body increases due to running out of oil, and the vibration isolating mechanism increases. Can be prevented from being deteriorated in durability.

Further, it is possible to prevent water spilled from the washing tub from entering the vibration damping mechanism undesirably, and also in this respect, it is possible to suppress the durability of the vibration damping mechanism from being deteriorated.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a dehydrating washing machine according to an embodiment of the present invention.

FIG. 2 is a plan view of the washing machine.

FIG. 3 is a sectional view of an anti-vibration mechanism of the washing machine.

FIG. 4 is a cross-sectional view of a vibration damping mechanism according to another embodiment.

FIG. 5 is a sectional view of a conventional anti-vibration mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Machine frame 2 Hanging rod 3 Washing tub 4 Anti-vibration mechanism 5 Washing and dehydrating tub 9a Receiving pipe 9b Cap 10 Bracket 11 Small hole 12 Receiving part 13 Sliding plate 15 Impregnated body 17 Suspension

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-6-254291 (JP, A) JP-A-5-49787 (JP, A) JP-A-8-61415 (JP, A) JP-A-8-815 24474 (JP, A) JP-A-6-277389 (JP, A) JP-A-5-49793 (JP, A) JP-A-2-257994 (JP, A) (58) Fields investigated (Int. ⁷ , DB name) D06F 37/24

Claims (3)

(57) [Claims] An anti-vibration mechanism is attached to a lower part of a hanging rod mounted on an upper portion of a machine frame, and a washing tub in which a washing and dewatering tub is provided is suspended and supported by the hanging rod via the anti-vibration mechanism. In the dehydrating washing machine, the anti-vibration mechanism slides on a lower surface of a bracket provided on the washing tub, and is attached to a lower end opening of the hanging rod through which the hanging rod is inserted and a lower end of the hanging rod in the receiving pipe. A sliding body that slides on the inner wall of the receiving pipe, a suspension interposed between the sliding body and an upper inner wall in the receiving pipe, and a lower end of the receiving pipe fixed to a lower portion of the receiving pipe. A cap that closes the opening, and when the sliding body is formed in the cap and moves upward in the receiving tube,
Between the sliding body and the cap in the receiving tube
The outside air flows into the lower space that can be
When the sliding body moves down, the compressed air generated by the sliding body rises.
A small hole that flows out from the lower space to the outside . 2. An anti-vibration mechanism is attached to a lower part of a hanging rod mounted on an upper part of a machine frame, and a washing tub in which a washing and dewatering tub is provided is suspended and supported by the hanging rod via the anti-vibration mechanism. In the dehydrating washing machine, the anti-vibration mechanism slides on a lower surface of a bracket provided on the washing tub, and is attached to a lower end opening of the hanging rod through which the hanging rod is inserted, and a lower end of the hanging rod in the receiving pipe. A sliding member that slides on the inner wall of the receiving tube, a suspension interposed between the sliding member and an upper inner wall in the receiving tube, and an oil or the like that smoothly slides the sliding member. An impregnating body to be impregnated, a cap fixed to a lower portion of the receiving tube, closing a lower end opening of the receiving tube, a small hole formed near the center of the cap, and an inner wall of the cap around the small hole. Formed from the impregnated body, etc. A dehydration washing machine characterized by comprising a receiving part. 3. A state in which a rising portion around the cap is fitted in a downward groove around a lower end of the receiving tube.
3. The dehydrating washing machine according to claim 1, wherein the cap is heat-sealed and fixed to the receiving tube.