KR20050039133A - Damper structure of drum washing machine - Google Patents

Abstract

The present invention relates to a damper structure of a drum washing machine, wherein the vibration washing machine absorbs vibrations and shocks received from laundry during operation of the washing machine (2), so that the drum washing machine can be damped and cushioned to the inside of the drum washing machine (1) and to the lower part of the washing machine (2). It is provided with a plurality, the interior includes a hydraulic damper 400 is filled with a filling material such as gas and oil to generate a damping force. Therefore, the damper structure using oil resistance can efficiently absorb vibration while supporting the washing tank of the drum washing machine, and has an effect of realizing low noise.

Description

Damper structure of drum washing machine {DAMPER STRUCTURE OF DRUM WASHING MACHINE}

The present invention relates to a damper structure of a drum washing machine, and more particularly, to a damper structure of a drum washing machine for effectively reducing vibration and noise generated in a general domestic drum type washing machine.

In order to prevent vibration of a general drum washing machine, a friction damper using a coil spring method and a friction material has been used.

1 and 2 is a drum washing machine using a friction method, Figure 1 is a conventional drum washing machine structure diagram, Figure 2 is a damper cross-sectional view of a conventional drum washing machine.

The drum washing machine is provided with a washing tank (2) installed in the exterior (1), and a dehydration tank (3) provided to hold laundry in the washing tank (2).

And a spring (5) installed elastically between the exterior (1) and the washing tank (2) so as to support the washing tank (2) from the top, and fixing and supporting the washing tank (2) at the lower part of the washing tank (2). It consists of a damper (4) provided between the exterior (1) and the washing tank (2) to reduce the vibration width, and a leg (leg: 7) provided to support the drum washing machine at the lower part of the exterior (1).

Here, the damper is coupled to the outer circumferential surface of the washing tub 2 in a pipe shape, as shown in FIG. 2, and the tube 8 is open at one side and inserted into the open tube 8, and the other end thereof is the tube 8. A rod 9 coupled to the exterior 1 so as to extend outward and reciprocate by vibration of the washing tub 2, and installed between the inside of the tube 8 and the outside of the rod 9, It is composed of a friction member 10 for generating a friction force to reduce the vibration amplitude.

The drum washing machine having such a structure puts laundry into the dehydrating tank 3 and then applies power to the drum washing machine, and the washing water flows into the washing tank 2, and when a certain amount of washing water flows into the washing machine, the washing machine rotates to wash the laundry. Done. And when the washing of the laundry is completed, the laundry is dewatered.

At this time, the vibration of the washing tank (2) and the dehydration tank (3) generated during the washing or dehydration process is transmitted to the damper (4).

In the damper 4, the vibration amplitude of the washing tank 2 is reduced by the frictional force of the friction member 10 while the rod 9 reciprocates in the tube 8 due to the vibration amplitude of the washing tank 2.

However, the damper 4 using such a frictional force operates with a change in load irrespective of vibration, and thus, the following problems occur. That is, if the load is small, but the load is small but a large vibration occurs, due to the small load may not occur the damping characteristic itself. On the contrary, in the case of a lot of laundry, the damper 4 operates due to the occurrence of large but small vibrations, which may have adverse effects on slip generation and noise prevention of the rod 9. .

In addition, although the coil spring of the coil method not shown above, the control ability is superior to the vibration control ability compared to the damper using the friction force, but because it is not a structure that can support the lower part of the washing tank is a separate support structure There was a disadvantage to be configured.

The present invention is to solve the conventional problems as described above, it is an object of the present invention to provide a damper structure of the drum washing machine that can absorb the vibration efficiently while supporting the washing tank of the drum washing machine, and realized low noise.

In order to achieve the above object, the present invention, in the damper structure of the drum washing machine, a plurality of dust-proof, shock-absorbing device is installed on the inner side of the drum washing machine and the lower part of the washing tank to absorb the vibration or shock received from the laundry when the washing tank is running. The inside of the log provides a damper structure of a drum washing machine including a hydraulic damper filled with gas and oil and generating damping force.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 shows a damper of the drum washing machine according to the invention, Figure 4 is a cross-sectional view of the damper according to the invention, Figure 5 is a perspective view showing a piston valve of the damper according to the present invention, Figure 6 is the present invention Is a perspective view of the base body of the damper according to the present invention.

The same constituent members as the embodiment shown in the prior art will be described with the same reference numerals with reference to FIG.

The drum washing machine is provided with a washing tank (2) installed in the exterior (1), and a dehydration tank (3) provided to hold laundry in the washing tank (2).

And a spring (5) installed elastically between the exterior (1) and the washing tank (2) so as to support the washing tank (2) from the top, and fixing and supporting the washing tank (2) at the lower part of the washing tank (2). It consists of a plurality of dampers (400) provided between the exterior (1) and the washing tank (2) so as to reduce the vibration width, and legs (leg: 7) provided to support the drum washing machine at the lower part of the exterior (1).

As shown in FIG. 4, the damper 400, which is a feature of the present invention, is provided with one end of the piston rod 430 described below in the washing tank 2, and a lower bracket 404 at the bottom of the damper 400. It is installed inside the exterior 1 and is a vibration damper that absorbs vibrations or shocks received from the laundry during operation of the washing tank 2, and a shock absorber that is filled with gas, oil, and the like to generate a damping force. 400 is used.

The damper 400 is provided with a cylindrical inner tube 410 filled with oil, and an outer tube 420 filled with oil halfway to the outside of the inner tube 410.

And one end is inserted into the inner tube 410 and the other end is provided with a piston rod 430 extending to the outside of the outer tube 420, the inside of the inner tube 410 at the end of the piston rod 430 A piston valve 440 is partitioned into the tension chamber 402 and the compression chamber 403 and generates a damping force by oil flow by linearly reciprocating along the inside of the inner tube 410.

In addition, the upper end of the inner tube 410 and the outer tube 420 is provided with a cap 451, the central axis of the opening so that the piston rod 430 can extend to the outside, inside the cap 451 A sealing assembly 450 is installed to prevent oil leakage.

The base body 460 is press-fitted to the lower end of the inner tube 410 so that oil flows into the outer tube 420 and the inner tube 410.

The base body 460 is another embodiment, due to the characteristics of the damping force change of the drum washing machine is less, may not be installed depending on the capacity of the drum washing machine.

On the other hand, the sealing assembly 450 has an oil seal 452 is installed on the inner surface of the cap 451, the rod guide 454 supporting the piston rod 430 in the lower portion of the oil seal 452 Is installed, the check valve 456 and the packing spring 458 to strengthen the sealing function between the oil seal 452 and the rod guide 454 is sequentially installed.

The sealing assembly 450 is generally able to ensure the life of the drum washing machine used for a long time.

As shown in FIG. 5, the piston valve 440 includes a plurality of pistons 442 having a compression flow path 442a and a tension flow path 442b formed in a circumferential direction at predetermined intervals, and on an upper surface of the piston 442. An intake valve 444 provided to open and close the compression flow passage 442a and the tension flow passage 442b, a washer 446 provided above the intake valve 444, and between the washer 446 and the intake valve 444. It is composed of a retainer 448 installed in the retainer to maintain the gap.

The piston valve 440 above does not require a high damping force, so the lower end of the piston 442 does not employ discs.

6 illustrates a base body 460, in which a guide hole 461 is formed in a vertical direction on one side of the circumferential surface to induce the flow of oil.

And it is installed on the outer peripheral surface of the piston rod 430 includes a stopper 470 for controlling the extension of the upper side of the piston rod 430.

The damper structure of the drum washing machine according to the present invention configured as described above is as follows.

The damper 400 of the drum washing machine absorbs vibrations or shocks received by the exterior 1 during washing or dehydration by applying a hydraulic damper 400 having characteristics of low damping force and low damping force change at low speed and high speed.

Referring to FIG. 4 again, vibration occurs in the washing tank 2 due to a phenomenon in which the laundry contained in the dehydrating tank 3 is biased to one side. At this time, the damper 400 in the inclined direction of the washing tank 2 and the damper 400 of the other side is operated organically to maintain the balance of the washing tank (2).

The damper 400 on the side to which the load is applied due to the inclination of the washing tank 2 causes the piston rod 430 to be compressed to generate a pressure difference between the tension chamber 402 and the compression chamber 403. The fluid filled in the compression chamber 403 is introduced into the outer tube 420 along the guide hole 461 of the base body 460, and some oil is intake through the compression passage 442a of the piston 442. The damping force is generated by pushing the valve 444 upward.

On the contrary, during the tension stroke, the length of the piston rod 430 is extended, and the oil of the tension chamber 402 flows into the compression chamber 403 through the tension channel 442b of the piston 442 to generate a damping force. .

In this case, the sealing assembly 450 has an outer circumferential surface in close contact with the inner circumferential surface of the outer tube 420 and an inner circumferential surface in close contact with the outer circumferential surface of the piston rod 430 to leak oil and gas from the inner tube 410 and the outer tube 420. Will be prevented.

As described above, the damping force is generated while repeatedly performing compression and tensioning operations in the plurality of dams 400, thereby maintaining the balance of the unbalanced washing tank 2, and achieving low noise.

Although the present invention has been illustrated and described with respect to certain preferred embodiments, the present invention is not limited to the above-described embodiments, and a person skilled in the art to which the present invention pertains has the present invention set forth in the claims below. Various modifications may be made without departing from the spirit of the invention.

As described above, according to the damper structure of the drum washing machine of the present invention, the damper structure using oil resistance can efficiently absorb vibration while supporting the washing tank of the drum washing machine, thereby achieving low noise.

1 is a structural diagram of a conventional drum washing machine,

2 is a cross-sectional view of a damper of a conventional drum washing machine,

Figure 3 shows a damper of the drum washing machine according to the present invention,

4 is a sectional view of a damper according to the present invention;

5 is a perspective view illustrating a piston valve of a damper according to the present invention;

6 is a perspective view showing a base body of the damper according to the present invention.

<Description of the code | symbol about the principal part of drawing>

400: damper 410: inner tube

420: outer tube 430: piston rod

440: piston valve 450: sealing assembly

460: Base Body

Claims (6)

In the damper structure of the drum washing machine, A plurality of vibration dampers are installed inside the drum washing machine and the lower part of the washing tank to absorb vibrations or shocks received from the laundry during operation of the washing machine. Damper structure of the drum washing machine comprising. The method of claim 1, Each of the dampers, A cylindrical inner tube filled with oil, An outer tube half filled with oil to the outside of the inner tube, One end is inserted into the inner tube and the other end of the piston rod extending to the outside of the outer tube, A piston valve installed at an end of the piston rod to partition the inside of the inner tube into a tension chamber and a compression chamber, and linearly reciprocate along the inside of the inner tube to generate a damping force by oil flow; A sealing assembly installed inside a cap having a central axis opened so that the piston rod can extend to the outside, and a sealing assembly preventing oil leakage; It is installed in the lower end of the inner tube by the base body which the oil flows into the outer tube and the inner tube Damper structure of the drum washing machine characterized in that the configuration. The method of claim 1, Each of the dampers, A cylindrical inner tube filled with oil, An outer tube half filled with oil to the outside of the inner tube, One end is inserted into the inner tube and the other end of the piston rod extending to the outside of the outer tube, A piston valve installed at an end of the piston rod to partition the inside of the inner tube into a tension chamber and a compression chamber, and linearly reciprocate along the inside of the inner tube to generate a damping force by oil flow; Sealing assembly is installed inside the cap that the central shaft is opened so that the piston rod can extend to the outside to prevent oil leakage Damper structure of the drum washing machine characterized in that the configuration. The method of claim 2 or 3, The piston valve, A piston having a plurality of compression passages and tension passages formed in a circumferential direction at a predetermined interval, An intake valve installed on an upper surface of the piston to open and close the compression passage and the tension passage; A washer installed on an upper side of the intake valve, A retainer installed between the washer and the intake valve to maintain a gap; Damper structure of the drum washing machine characterized in that the configuration. The method of claim 2 or 3, The sealing assembly, An oil seal positioned on the inner side of the cap to prevent oil leakage; A rod guide installed at a lower portion of the oil seal and supporting the piston rod; It is installed between the oil seal and the rod guide in order to check valve and packing spring to enhance the sealing function Damper structure of the drum washing machine characterized in that the configuration. The method of claim 2, The base body, Damper structure of the drum washing machine, characterized in that the guide hole is formed in the vertical direction on one side of the circumferential surface to induce the flow of oil.