KR100253190B1 - Damper of washing machine - Google Patents

Abstract

PURPOSE: A damper is provided to prevent a transmission of vibration by suppressing the vibration of a transient state and minimizing an action of damping force in a steady state. CONSTITUTION: A damper of a washing machine comprises a damping container(10) connected with an inner tub and an outer tub; a supporting shaft(11) combined with an outer case; a spring(12) inserted inside the damping container(10); and an elastic damping member(E) to support the spring(12) and to have variable damping force by inserting inside the damping container(10) and combining with the supporting shaft(11). In a transient state, vibration is reduced by sticking brushes of the elastic damping member to the damping container(10), folding and sliding the brushes. In a steady state, the vibration is reduced by folding and vertically moving the brushes without sliding.

Description

Damper of washing machine {DAMPER OF WASHING MACHINE}

The present invention relates to a washing machine, and more particularly, to a damper of a washing machine for reducing vibration noise generated in the process of washing laundry.

In general, the washing machine, as shown in Figure 1, the outer case (1) having a predetermined internal volume, and the outer tank (2) installed in the outer case (1) forming a predetermined container for containing water therein And an inner tub 3 formed in a cylindrical shape to accommodate laundry therein, and a driving motor 4 installed on an outer bottom surface of the outer tub 2 to generate a driving force. And a clutch 5 which transmits and blocks the driving force of the drive motor 4 to the inner tank 3.

The washing machine puts laundry and detergent into the inner tank 3 and while washing water is supplied, a series of processes such as washing, rinsing, and dehydration are performed to wash the laundry.

On the other hand, in the process of washing the laundry in the washing machine, the dehydration process is the water remaining in the laundry by rotating the inner tank (3) is dehydrated, in this process due to the tangled laundry in the laundry process before the dehydration, laundry It is not evenly distributed in the inner tub 3 and is in a biased state in a part, causing vibration during rotation of the inner tub 3.

Vibration generated in the inner tank 3 is transmitted to the outer tank 2 and the components coupled to the inner tank 3 is coupled to vibrate together, which is transmitted to the outer case 1 to which the outer tank 2 is supported and coupled If so, it emits noise. Noise also radiates noise due to the tremor of the outer tank 2 itself.

Therefore, while supporting the outer casing (2) assembly consisting of the components coupled to the outer tank (2) to the outer case (1) and the vibration generated in the outer tank (2) assembly is transmitted to the outer case (1) Dampers (D; Dampers) are combined to minimize.

As an example of the conventional structure of the washing machine damper, the damper structure of the washing machine, as shown in Figure 2, one side is opened, the through-hole 6a is formed at the other end and the air hole 6b is formed at the side Of the cap 6, the coil spring 7 inserted into the gap 6, one side is coupled to one side of the outer case (1) and the other side through the through hole (6a) of the cap (6) The rod 8 is inserted into the cap 6 and is inserted into the cap 6 and coupled to the other side of the rod 8 positioned inside the cap 6 to move while sealing the inside of the cap 6. The base 9 which supports the coil spring 7 is comprised. The cap 6 is coupled to one side of the outer tub (2).

In addition, several dampers D are provided.

Conventional washing machine damper as described above, when the vibration generated in the outer tub (2) assembly during washing, friction damping force or friction caused by the friction generated between the base 9 and the cap (6) cap 6 By closing the interior of the cap 6, the vibration transmitted by the air damper force (Air Damper Force) generated by moving the air located inside the cap (6) through the air hole or the form in which the two are simultaneously attenuated do.

However, the conventional damper structure as described above shows that in the case of a large damping, the amplitude of the low frequency frequency is attenuated but the amplitude of the high frequency frequency is amplified when the damping is large, and vice versa when the damping is small. It becomes visible. This is because there is a damping force in the initial state (Transient State) during operation, it has the advantage of catching excessive vibration due to the unbalanced state of the laundry, but the damping in the normal state of movement, that is, steady state This means a drawback that makes the noise louder.

Accordingly, it is an object of the present invention to provide a damper of a washing machine to suppress the vibration of the initial state when the vibration is started, and then to prevent the transmission of vibration by minimizing the damping force acting in the normal state.

1 is a cross-sectional view schematically showing an example of a general washing machine;

2 is a cross-sectional view showing a damper of a conventional washing machine;

3 is a cross-sectional view showing a washing machine damper of the present invention;

Figure 4a is a front view showing the elastic damping means constituting the washing machine damper of the present invention,

Figure 4b is a plan view showing the elastic damping means constituting the washing machine damper of the present invention,

5 to 8 are plan views showing modified examples of the brush constituting the elastic damping means in the washing machine damper of the present invention;

9 is a front view showing another embodiment of the elastic damping means constituting the washing machine damper of the present invention;

10 is a plan view showing another embodiment of the elastic damping means constituting the washing machine damper of the present invention,

11A is a front view partially showing an operating state in an initial state of a washing machine damper of the present invention;

Figure 11b is a front view partially showing an operating state in the steady state of the washing machine damper of the present invention.

(Explanation of symbols for the main parts of the drawing)

One ; Outer case 2; Bird

3; Internal article 10; Damping Container

10a; Insertion hole 11; Support shaft

12; Spring 13; Awards base

14; Spacing members 15,15 '; brush

15a, 15'a; Horizontal sections 15b, 15'b; Vertical

16; Support base E; Elastic damping means

In order to achieve the object of the present invention as described above, the damping vessel is coupled to one side of the outer tank is formed in a cylindrical shape of one side is opened and the insertion hole is penetrated to the other end and the inner tank and the driving means is combined with the laundry therein, It has a predetermined length and one side is coupled to the outer case in which the outer shell is inserted, the other side is inserted into the damping container, the spring is inserted into the damping container, and the disk shape smaller than the inner diameter of the damping container The upper base is inserted into the support shaft and is supported by the spring, and the connecting line forming the edge has a diameter larger than the inner diameter of the damping container and the material is made of an elastic elastic material to be inserted into the support shaft and the damping container. And a plurality of brushes, and a support base inserted into and fixed to the support shaft after the brushes. The damper of the washing machine characterized by the name, is provided.

Hereinafter, the washing machine damper of the present invention will be described according to the embodiment shown in the accompanying drawings.

The washing machine damper of the present invention, as shown in Figure 3, is formed in a cylindrical shape in which one side is opened and the insertion hole (10a) through the other end is coupled to the inner tank (3) and the driving means into which the laundry is introduced A damping vessel 10 coupled to one side of the outer tub 2, a support shaft 11 having a predetermined length and coupled to one side of the outer case 1 in which the outer tub 2 is inserted; Spring 12 is inserted into the damping vessel 10, and is coupled to the end of the support shaft 11, which is inserted into the damping vessel 10 and located inside the damping vessel 10, It comprises an elastic damping means (E) to have a variable damping force while supporting one side of the spring (12).

The insertion hole 10a formed in the damping vessel 10 is formed to have a diameter into which the support shaft 11 is inserted. In addition, the damping container 10 is coupled to the outer tub 2 has a general structure in which laundry is introduced into the inner tub 3, and the driving motor 4 and the clutch as driving means are formed on the outer bottom surface of the outer tub 2. 5) is combined.

The spring 12 is preferably formed of a coil spring.

The elastic damping means (E) is an upper base 13 formed in a disc shape smaller than the inner diameter of the damping vessel 10 is in contact with the spring 12, the lower diameter of the lower base than the upper base 13 Spacing member 14 formed in a disc shape having a predetermined thickness and the connecting line forming the edge is formed with a diameter larger than the inner diameter of the damping vessel 10, the brush 15 made of an elastic elastic material is alternating It is coupled so that the support base 16 is attached to the lower side.

The upper base 13, the space keeping member 14, the brush 15, and the support base 16 have a through hole formed in the center thereof and are inserted into and coupled to the support shaft 11. The engaging pin 11a is coupled to the end.

The spacing member 14 and the brush 15 is preferably formed of rubber which is an elastic material.

Preferably, the interval maintaining member 14 and the brush 15 are each composed of two.

를 이루도록 위치함이 바람직하다.The brush 15 has a horizontal portion 15a and a vertical portion 15b having a predetermined cross shape, and the phases of the brushes 15 are 45

It is preferred to be positioned to achieve.

As a modified example of the brush 15, as shown in FIG. 5, the brush 15 is formed in an elliptical shape, and the brushes 15 are preferably positioned so that the phases of the brushes are 30 ° to each other.

As another modification of the brush, as shown in Figure 6, the brush is preferably formed of a disc larger than the inner diameter of the damping vessel (10).

As another modification of the brush, it is formed in a shape as shown in Figs. 7 and 8, and the phase difference is such that the edge line is circular.

On the other hand, the spacing member 14 and the brush 15 is formed integrally to simplify the assembly process.

As another embodiment of the present invention, as shown in Figure 9, the elastic damping means (E) is an upper base 13 formed in a disc shape smaller than the inner diameter of the damping vessel 10 is the spring 12 The connecting line forming the edge is larger than the inner diameter of the damping vessel 10, and the brush 15 'made of an elastic elastic material is coupled in series, and the support base 16 is attached to the lower side thereof. It is done. The brush 15 ′ is preferably formed of rubber of elastic material.

를 갖도록 이루어짐이 바람직하다.As shown in FIG. 10, the brush 15 'has a horizontal portion 15'a having a predetermined width and a vertical portion 15'b formed in a cross shape, and the phases of the brushes 15'. This each other 45

It is preferable that it is made to have.

Hereinafter, the operation and effect of the washing machine damper of the present invention will be described.

First, while washing the laundry by putting the laundry and detergent in the washing machine, the inner tank 3 rotates during dehydration to cause vibration by the unbalanced state of the laundry as well as the vibration in the outer tank 2 itself. The generated vibration is attenuated by the damper of the present invention for supporting the outer tub 2 in the outer case 1 so that the vibration is suppressed from being transmitted to the outer case 1.

The vibration of the damper is attenuated by the damping force of the elastic damping member (E). The vibration generated during the dehydration is characterized in that the amplitude of the vibration is increased in the initial state when the dehydration starts, and the amplitude of the vibration is small in the steady state after a certain time, the vibration generated in the initial state and the normal state is the elastic damping It is attenuated by the damping force of the member E. First, when the vibration generated in the initial state, as shown in Figure 11a, the brush (15, 15 ') constituting the elastic damping member is in close contact with the inner peripheral surface of the damping vessel (10) The damping force acts as the edge of the crank slides up and down to attenuate the transmitted vibration. In addition, when the vibration occurs in the normal state after the initial state, as shown in Figure 11b, the brush (15, 15 ') constituting the elastic damping member (E) is in close contact with the inner peripheral surface of the damping vessel (10) Sliding does not occur in the only the edge of the brush (15, 15 ') is bent in the state of moving up and down based on a contact with the damping force acts to attenuate the transmitted vibration.

Variables that can change the function of the damper are the diameter (d) of the damping vessel 10, the diameter (D) formed by the edges of the brushes (15, 15 '), the bendable portion of the brush (15'15') The length L, the thickness H of the brushes 15, 15 ', the thickness h of the short holding member 14, the number of brushes 15, 15', the shape of the brushes 15, 15 ', and the like. to be. By adjusting these parameters it is possible to apply an appropriate damping force.

In the form of the brushes 15 and 15 ′ forming the elastic damping means E, a large damping force acts when the contact surface pressed against the inner circumferential surface of the damping vessel 10 is large, and when the contact area is small, a small damping force is applied. Will work. In addition, when the number of brushes 15 and 15 'is large, a large damping force acts. When the number of brushes 15 and 15' is small, a small damping force acts.

The present invention can be manufactured with a simple structure, and also the use of inexpensive component materials becomes possible.

As described above, the damper of the washing machine according to the present invention transmits the vibration generated in the initial state as well as the vibration generated in the process of washing the laundry, in particular, the vibration generated during dehydration to the outer case. By minimizing the vibration, there is an effect of preventing vibration noise generated during washing.

Claims (3)

A damping container which is formed in a cylindrical shape, one side is opened and the insertion hole is penetrated at the other end, and the inner tank into which the laundry is introduced and the driving means are coupled, and a damping container coupled to one side, and having a predetermined length. The support shaft is coupled to the outer case and the other side is inserted into the damping container, the spring is inserted into the damping container, and formed into a disc shape smaller than the inner diameter of the damping container is inserted into the support shaft and the spring A plurality of brushes inserted into the support shaft and the damping container, the upper end of the support base and the connecting line constituting the edge has a diameter larger than the inner diameter of the damping container and is made of an elastic elastic material. Damper of the washing machine comprising a support base that is inserted and fixed to the support shaft. The damper of claim 1, wherein one or more spacing members are inserted between the upper base and the brush or between the brush and the brush or between the brush and the support base. The damper of claim 2, wherein the gap maintaining member and the brush are integrally formed.

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