KR20110033605A - A damper for a drum-type washing machine - Google Patents

Abstract

PURPOSE: A damper for a drum-type washing machine is provided to prevent the distortion and damage of a damper housing caused by shock or friction during a slide operation. CONSTITUTION: A load member(4) slides by external vibration, and a friction member(6) moves with the load member within friction contact force. A guide member(8) guides the movement direction while being moved with the friction member. The guide member is arranged inside a damper housing(2). If the load member slides by the external vibration over the friction contact force, a noise reduction unit(10) restricts the movement of the load member through the friction contact force of the friction member.

Description

Damper for a drum washing machine {a damper for a drum-type washing machine}

The present invention relates to a drum washing machine damper that can easily attenuate various vibrations generated when the drum washing machine is driven.

In general, a washing machine is a device for washing contaminated clothes or bedding using water and detergent, and a pulsator driving method, an edge data driving method, and an edge data driving method. There is a drum driving method.

In particular, the drum-driven drum washing machine is hardly damaged (entangled phenomenon) of laundry, and it is known that a uniform washing effect can be obtained, and the demand is increasing significantly.

The drum washing machine has a tub (tub) in which the drum is built, as is well known, and the drum is rotated about a horizontal axis by a driving unit.

In addition, most drum washing machines include a vibration damping device called a damper so as to damp vibrations generated on the tub side when the drum is rotated.

The damper includes a housing, a rod member whose one end is fitted to the housing side so as to be slidably movable, and a friction member fitted in a state in which one end of the rod member is wrapped.

Among the components of the damper, the friction member plays an important role of absorbing vibration while limiting the slide movement of the rod member. The material mainly uses felt, and the inside of the housing during the slide movement of the rod member. While moving along a predetermined interval, the sliding contact force of the rod member is controlled by the locking contact force of the outer surface and the friction force of the inner surface.

According to such a damper structure, it is very important to protect the outer surface of the friction member from contact shock.

For example, the friction member made of felt may be easily deformed or damaged to an abnormal shape of the outer surface by contact impact or friction during slide movement of the rod member.

In order to solve this problem, a guide member corresponding to the friction member is provided inside the housing of the damper.

The guide member is mainly made of synthetic resin (or metal) having excellent durability and wear resistance, and is installed to surround the outer surface of the friction member to guide the direction of movement and protect the outer surface from various contact shocks or friction. Do it.

However, according to the conventional damper structure described above, there is a problem in that operation shock and noise are easily generated by the guide member.

Such operation shock or noise is known to occur most of the time when the guide member moves along the sliding direction of the rod member while directly contacting the inner surface of the housing (or the housing cap).

In particular, since the drum washing machines are mainly provided indoors, if the damper quietness is poor during driving, the drum washing machine may be a factor that greatly lowers the reliability of the drive as well as the commercial reliability.

As described above, when the guide member is exposed to frequent contact shock or friction during operation of the damper, the shape may be easily deformed or broken, so that it is difficult to expect satisfactory durability.

Moreover, when the guide member is deformed or broken, the friction member may operate abnormally and may cause the damper to malfunction.

These problems are due to the fact that the conventional dampers do not have a means for suppressing the operating shock or noise that may be caused by frequent contact or friction of the guide member.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems occurring in the prior art,

It is an object of the present invention to provide a damper for a drum washing machine that can significantly reduce the operating shock and noise of the damper.

In order to realize the object of the present invention as described above,

Damper housing;

A rod member, one end of which is inserted into the damper housing and connected to the slide member by external vibration;

A friction member provided in frictional contact with an outer surface of the rod member located inside the damper housing and moving together with the rod member within a frictional contact force;

A guide member disposed inside the damper housing in a state capable of guiding a moving direction and protecting an outer surface while moving together with the friction member;

Noise formed to limit movement of the rod member by contact frictional force of the friction member while contacting one side or the other side of the guide member in a buffered state when the rod member slides due to an external vibration greater than the frictional contact force of the friction member. Abatement means;

It provides a damper for a drum washing machine comprising a.

In the present invention, the guide member is installed to guide the conveying direction of the friction member inserted on the rod member side and protect the outer surface, so that the friction member is subjected to various impacts or frictions inside the damper housing during the slide movement of the rod member. The phenomenon of being damaged or deformed by the back can be effectively prevented.

In particular, the present invention has a noise reduction means formed so as to absorb the contact impact and noise of the guide member in the damper housing when the guide member moves together in the slide direction of the rod member, the operation safety and quietness of the damper Can be further increased.

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

The embodiments of the present invention will be described by those skilled in the art to which the present invention is applicable.

Therefore, since the embodiments of the present invention can be modified in various other forms, the claims of the present invention are not limited to the embodiments described below.

1 is a view schematically showing the overall structure of a damper for a drum washing machine according to an embodiment of the present invention, Figures 2 and 3 schematically show a preferred use state of the damper for a drum washing machine according to an embodiment of the present invention. As shown, reference numeral 2 designates a damper housing.

The damper housing 2 has a buffer space S having one side open, and may be formed in a conventional cylinder type.

The damper housing 2 may be made of synthetic resin (or metal). In particular, a polypropylene resin known to be excellent in durability, wear resistance and light weight may be used.

In addition, the damper housing 2 is provided with the usual vent holes (V) formed so that the air can be properly introduced and discharged in conjunction with the slide movement of the rod member (4) to be described later.

The drum washing machine damper according to the embodiment of the present invention includes a rod member (4).

One end of the rod member 4 is inserted into the damper housing 2 so that the slide member is connected to the rod member 4.

One end of the rod member 4 is inserted into the buffer space S of the damper housing 2, and the other end of the rod member 4 is exposed to the outside.

The material of the rod member 4 may be used among metal (or synthetic resin). In particular, steel known to be excellent in durability and strength may be used.

In addition, a housing cap S1 is installed at one side of the damper housing 2. The housing cap S1 is formed to block the buffer space S from the outside in a state where one end of the rod member 4 is fitted inside the damper housing 2.

According to this structure, one end of the rod member (4) can be reciprocated in a sliding manner along the buffer space (S) in the state fitted to the buffer space (S) side of the damper housing (2).

The damper housing 2 and the rod member 4 are formed with connecting portions J1 and J2.

Referring to FIG. 3 again, the connecting parts J1 and J2 fasten a fastening member B such as a bolt, for example, and end portions of the damper housing 2 and the rod member 4 in the drum washing machine. It consists of a normal structure which can be fixed to the tub M1 and cabinet M3 side of (M).

For example, one end of the damper housing 2 may be fastened and fixed to the bottom surface of the cabinet M3 of the drum washing machine M, and one end of the rod member 4 may be connected and fixed to the lower side of the tub M1. have.

Then, when the drum M2 of the drum washing machine M is rotated about a horizontal axis, the connection state capable of appropriately absorbing the vibration generated on the tub M1 side by the slide motion of the rod member 4. Becomes

Drum damper damper according to an embodiment of the present invention, the friction member 6 and the guide member (8).

The friction member 6 serves to hold the rod member 4 to absorb the vibration while limiting the slide movement of the rod member 4.

The friction member 6 is disposed inside the damper housing 2 and has a fixing hole portion H for holding the outer surface of the rod member 4 at a constant pressure. It may be of a cylindrical type corresponding to the buffer space (S).

The friction member 6 is selected from materials that can absorb vibration and shock. For example, it is possible to use known materials that can absorb vibrations or shocks smoothly, such as felt or rubber.

The guide member 8 is for protecting the outer surface of the friction member 6 and for guiding the conveying direction.

That is, the guide member 8 is, for example, a cylindrical type that can move along the buffer space (S) of the damper housing 2 in a state surrounding the outer surface (circumference) of the friction member 6. Can be done.

The material of the guide member 8 may be used in a synthetic resin (or metal) having a greater hardness than the friction member 6. For example, polypropylene resin known to be excellent in durability and abrasion resistance may be used.

Both ends of the guide member 8 may be formed to reduce the area of contact with the noise reduction means 10 described later.

For example, as shown in FIG. 3, the contact protrusions K may be formed at a plurality of points along the circumferences of both ends of the guide member 8.

In addition, the guide member 8 may be further provided with elastic protrusions (K1) formed to reduce the contact impact with an elastic force when in contact with the noise reduction means 10 to be described later.

The elastic protrusions K1 may be formed, for example, as shown in FIG. 3 so as to generate an elastic repulsive force between the contact protrusions K in a direction corresponding to the movement direction of the guide member 8.

In addition, the fixing protrusions T may be formed inside the guide member 8 as shown in FIG. 3 to prevent the friction member 6 from being separated.

The present invention is formed so as to absorb the vibration while limiting the movement of the rod member 4 in the damper housing 2 in two stages during the slide movement of the rod member (4).

That is, the friction member 6 is, for example, greater than the force of the fine vibration mainly generated in the dehydration mode in the driving mode of the drum washing machine (M), the pressure is less than the force of the large vibration mainly generated in the washing mode A fixing hole portion (H) is formed to hold one outer surface of the rod member (4).

When the friction member 6 moves along the rod member 4, the friction member 6 may be limited to a movement of the friction member 6 by a latching contact in the buffer space S of the damper housing 2. do.

That is, based on FIG. 3, the lower side of the friction member 6 is formed stepped inside the damper housing 2 to be used as the first locking surface Q1, and the inner surface of the housing cap S1. Can be used as the second locking surface Q2.

4 to 7 are views for explaining the preferred operation of the damper for a drum washing machine according to an embodiment of the present invention.

 For example, one side of the guide member 8 moves the friction member 6 together with the rod member 4 by the micro vibration generated at the tub M1 side when the drum washing machine M is driven in the dehydration mode. Alternatively, when the other side is caught by the first locking surface Q1 or the second locking surface Q2 as shown in FIGS. 4 and 5, the rod member 4 is limited in movement.

That is, since the fixing hole portion H of the friction member 6 holds the rod member 4 at a pressure greater than the force of the fine vibration, the rod member 4 is stopped when the friction member 6 is stopped. Can not move further in the direction passing through the fixing hole (H).

Therefore, the present invention is a slide of the rod member 4 such that the slide motion only within the transport range corresponding to the length between the first engaging surface Q1 and the second engaging surface Q2 as shown in Figs. It is possible to provide a control environment (stage 1 control) that absorbs vibrations while limiting movement.

For example, the guide member 8 may be moved while the friction member 6 moves together with the rod member 4 due to a large vibration generated on the tub M1 side when the drum washing machine M is driven in the washing mode. It is not possible to limit the slide movement of the rod member 4 in a state where one side or the other side of the rod is caught on the first locking surface Q1 or the second locking surface Q2.

That is, since the fixing hole portion H of the friction member 6 holds the rod member 4 at a pressure less than the force of the large vibration, the rod member 4 even when the friction member 6 is stopped. ) May move further in the direction passing through the fixing hole (H) as shown in FIGS. 6 and 7.

Therefore, at this time, it provides a control environment (two-stage control) that absorbs vibration while appropriately restricting the slide movement of the rod member 4 by the contact friction force of the inner surface of the fixing hole H of the friction member 6. can do.

Therefore, the present invention can provide a control environment that can appropriately absorb vibration while limiting the slide movement of the rod member 4 in one or two stages according to the driving mode of the drum washing machine (M).

On the other hand, the damper for drum washing machine according to an embodiment of the present invention includes a noise reduction means (10).

The noise reduction means 10 is formed to reduce contact shock or noise that may be caused by the contact of the guide member 8 inside the damper housing 2.

Referring to FIG. 3 again, the noise reduction means 10 may include a first noise reduction member F1 and a second noise reduction member F2.

The first and second noise reduction members F1 and F2 are formed of a material capable of reducing contact shock and noise. For example, it may be formed of a material such as felt or rubber.

The first and second noise reduction members F1 and F2 may be formed in a cylindrical type so as to be in contact with end portions of the contact protrusions K formed at one side or the other side of the guide member 8.

The first and second noise reduction members F1 and F2 are spaced apart from each other to correspond to one side and the other side of the guide member 8 inside the damper housing 2.

For example, the first noise reducing member F1 may be disposed at the first locking portion Q1 and the second noise reducing member F2 may be disposed at the second locking portion Q2. have.

The noise reduction means 10 may reduce contact shock and noise that may be generated by the guide member 8 moving together with the friction member 6 during operation of the rod member 4.

For example, when the drum washing machine M is driven, the guide member 8 is driven by the rod member 4 by the vibration generated on the tub M1 side. When moving toward Q2), one side or the other side of the guide member 8 may be in contact with the first noise reduction member F1 or the second noise reduction member F2 as shown in FIGS. 4 to 7.

Therefore, the noise reduction means 10, one side or the other side of the guide member 8 is the first locking surface Q1 or the second locking surface Q2 while moving with the rod member 4 during the operation of the damper. ) It can prevent contact shock or noise caused by direct contact with.

In particular, most of the operating shock or noise generated during the operation of the damper is known to occur when the guide member 8 surrounding the friction member 6 and the hard surfaces of the engaging surfaces Q1 and Q2 directly collide with each other.

Therefore, the noise reduction means 10 can absorb the contact impact or noise of the guide member 8 with a simple structure, thereby further increasing the operation safety and quietness of the damper.

In addition, when the rod member 4 is slid by the vibration as described above, one side or the other side of the guide member 8 contacts the first noise reduction member F1 or the second noise reduction member F2. When the vibration of the rod member 4 is absorbed by the first noise reduction member F1 or the second noise reduction member F2, the vibration damping force of the damper may be increased.

1 is a view schematically showing the overall structure of a damper for a drum washing machine according to an embodiment of the present invention.

2 and 3 are views schematically showing a preferred use state of the damper for a drum washing machine according to an embodiment of the present invention.

4 to 7 are views for explaining the preferred operation of the damper for a drum washing machine according to an embodiment of the present invention.

[Description of Symbols for Main Parts of Drawing]

2: damper housing 4: rod member 6: friction member

8: guide member 10: noise reduction means

Claims (9)

Damper housing; A rod member, one end of which is inserted into the damper housing and connected to the slide member by external vibration; A friction member provided in frictional contact with an outer surface of the rod member located inside the damper housing and moving together with the rod member within a frictional contact force; A guide member disposed inside the damper housing in a state capable of guiding a moving direction and protecting an outer surface while moving together with the friction member; Noise formed to limit movement of the rod member by contact frictional force of the friction member while contacting one side or the other side of the guide member in a buffered state when the rod member slides due to an external vibration greater than the frictional contact force of the friction member. Abatement means; Damper for drum washing machine comprising a. The method according to claim 1, The friction member, And a fixing hole configured to hold the outer surface of the rod member in a wrapped state, and configured to move toward an inner side and the other side of the damper housing during a slide movement of the rod member. The method according to claim 1, The friction member, Dampers for drum washing machines made of felt or rubber. The method according to claim 1, The guide member, Damper for drum washing machine, characterized in that installed in a state surrounding the outer surface of the friction member. The method according to claim 1, The guide member, A drum washing machine damper, characterized in that formed of synthetic resin or metal material having a greater hardness than the friction member. The method according to claim 1, The guide member, Further comprising contact protrusions, The contact protrusions, A drum washing machine damper, characterized in that a plurality of protrusions are formed to be in contact with the noise reduction means from one side or the other side of the guide member. The method according to claim 1, The guide member, It further comprises elastic projections, The elastic protrusions, A drum washing machine damper, characterized in that a plurality of protrusions are formed so as to reduce the contact impact with the noise reduction means at one side or the other side of the guide member with an elastic force. The method according to claim 1, The noise reduction means, A first noise reduction member and a second noise reduction member, The first noise reduction member and the second noise reduction member, A drum washing machine damper, characterized in that spaced so as to be in contact with one side or the other side of the guide member inside the damper housing. The method according to claim 8, The first noise reduction member and the second noise reduction member, Dampers for drum washing machines made of felt or rubber.

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