KR100511986B1 - A damper assembly of drum washer - Google Patents

Abstract

The present invention relates to a damper assembly of a drum washing machine for attenuating vibration of a tub, and more particularly, to a damper assembly of a drum washing machine capable of effectively attenuating the vibration of a tub by allowing different damping forces to be applied according to the vibration of the tub.

The damper assembly of the drum washing machine according to the present invention is provided with a cylinder, a piston installed at one end of the cylinder so as to be movable, and one end movable at the inside of the cylinder, and the other end of the piston is movable. And a damping member installed at one end of the slider to frictionally move the slider to the cylinder, and an auxiliary damping member installed at one end of the piston to frictionally move the piston to the cylinder. do.

Description

A damper assembly of drum washer

The present invention relates to a damper assembly of a drum washing machine for attenuating vibration of a tub, and more particularly, to a damper assembly of a drum washing machine capable of effectively attenuating the vibration of a tub by allowing different damping forces to be applied according to the vibration of the tub.

In general, the drum washing machine washes by using the friction between the drum and the laundry rotated by the driving force of the motor while detergent, washing water and laundry are put in the drum installed horizontally. There is almost no damage to the laundry and the laundry does not get tangled with each other. Knocking and rubbing has a washing effect.

1 is a side cross-sectional view showing a typical drum washing machine, Figure 2 is a side cross-sectional view showing a damper assembly according to the prior art.

In general, a drum washing machine includes a cabinet (2) forming an exterior, a base (2a) forming a lower portion of the cabinet (2), and a spring (4) inside the cabinet (2). The tub 6 is installed to be suspended and supported by the damper assembly 10 on the base 2a, and the tub 6 is rotatably installed inside the tub 6 so that laundry and washing water are contained to wash the laundry. A drum 7 which is formed on the inner wall surface of the drum 7, a lift 7a that lifts and drops laundry as the drum 7 rotates, and the drum 7 behind the tub 6. It is configured to include a motor (8) is installed to be connected to the drum 7 to rotate the drum (7).

Of course, the upper side of the tub 6 is connected to the water supply valve assembly 12 and the detergent box assembly 14 for supplying the washing water and the detergent into the tub 6 and the drum 7, the tub ( 6, a drain valve assembly 16 for draining the wash water inside the tub 6 and the drum 7 is connected to the lower side.

In particular, the tub (6) is installed so that the spring (4) is caught on both sides of the upper end to hang on the upper surface of the inside of the cabinet (2), the damper assembly 10 is hingedly connected to both lower ends of the base (2a) It is installed to be supported on the upper surface of the drum 7 is rotated so that the vibration transmitted to the tub 6 side can be reduced.

Specifically, as shown in FIG. 2, the damper assembly 10 has a cylindrical cylinder 12 having one end hinged to both ends of the bottom of the tub 6, and one end inside the other end of the cylinder 12. The cylindrical piston 14 is hinged and installed at both ends of the upper surface of the base 2a and the piston 14 is attached to an outer circumferential surface of the base 2a and compressed inside the cylinder 12. It is made of a damping member 16, such as a sponge installed.

Of course, the piston 14 is such that the stopper 14a, 14b for supporting the front and rear ends of the damping member 16 protrudes in the radial direction of one end of the piston 14 so that the damping member 16 is not removed. The damping member 16 is configured to have a constant damping force set in consideration of the vibration of the tub 6 in consideration of the operating speed of the motor 8.

As described above, since the damping member 16 is installed to be compressed on the inner circumferential surface of the cylinder 12, even if a relative movement occurs between the cylinder 12 and the piston 14 due to the vibration of the tub 6. The piston 14 is frictionally moved inside the cylinder 12 so that the vibration of the tub 6 is attenuated.

However, the damper assembly of the drum washing machine according to the prior art is provided with a damping member 16 having a constant damping force at one end of the piston 14, the steady state in which the motor 8 is rotated at a constant speed during the dehydration stroke While the vibration of the tub 6 is relatively small, the vibration of the tub 6 is relatively large in a transient state in which the motor 8 accelerates or decelerates and rotates effectively in the steady state and the transient state of the dehydrating stroke. There is a problem that can not attenuate the vibration of the tub (6).

The present invention has been made in order to solve the problems of the prior art, to provide a damper assembly of a drum washing machine that can effectively damp the vibration of the tub by the damping force that is variable according to the vibration of the tub is provided. have.

The damper assembly of the drum washing machine according to the present invention for solving the above problems is a cylinder, one end of the piston is installed to be movable in the interior of the cylinder, and one end is movable to the inside of the cylinder and the A slider having one end movable inside thereof, a damping member installed at one end of the slider to frictionally move the slider to the cylinder, and one end of the piston to frictionally move the piston to the cylinder It is configured to include an auxiliary damping member.

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

3 and 4 are a side cross-sectional view and an exploded perspective view showing a first embodiment of the damper assembly of the drum washing machine according to the present invention.

The drum washing machine according to the present invention is installed between a tub (6) in which washing water is contained and washing the laundry, and a base (2a) which forms a lower portion of the cabinet (2) forming an outline to support the tub (6). In the steady state and transient state, the vibration of the tub 6 is effectively reduced.

Here, reference numerals not shown will be described with reference to FIG. 1.

Specifically, the first embodiment of the damper assembly of the drum washing machine according to the present invention is a cylinder 52, one end of which is hinged to the tub 6, as shown in Figure 3 and 4, and the cylinder 52 One end of the piston 54 and the other end is hinged to the base (2a) and the other end of the piston 54 is installed so as to be movable in the other end of the other end of the piston (54) A slider 56 having the other end movable therein; a damping member 62 provided at one end of the slider 56 to frictionally move the slider 56 in the cylinder 52; and the slider A stopper 64 formed at the 56 and the piston 54 so that the slider 56 is frictionally moved inside the piston 54 within a set displacement; 54, the cylinder 52 Is configured to include a second damping member 66 is such that friction in the moving parts.

Here, the cylinder 52 has a cylinder holder (52a) is formed so that one end can be hinged to the cylinder fixing end (11a) formed on both sides of the lower end of the tub (6), the piston (54) and the slider ( 56 is formed into a cylindrical shape so that it can be inserted.

Next, one end of the piston 54 is formed in a cylindrical shape so that the slider 56 can be inserted, the other end is hinged to the piston fixed end (11b) formed on both sides of the upper surface of the base (2a) Holder 54a is formed.

Next, the slider 56 has a cylindrical slider body 56a having an outer diameter smaller than the inner diameter of the piston 54 so that the slider 56 can be inserted into the piston 54, and a radius at one end of the slider body 56a. It further comprises a damping member mounting portion 56b formed to protrude further in the direction and the outer diameter is smaller than the inner diameter of the cylinder (52).

Next, the damping member 62 is made of a material such as a sponge having a constant damping force, and is installed to be fixed to an outer circumferential surface of the damping member mounting portion 56b and is installed to be compressed to an inner circumferential surface of the cylinder 52. To frictionally move inside the cylinder (52).

Next, the stopper 64 is axially elongated so as to face the piston 54 and the guide hole 64a to be inserted into the guide hole 64a to be moved along the guide hole 64a. Consists of a guide protrusion (64b) protruding to face the outer peripheral surface of the other end of the slider body 56a, a pair of slots 56s long in the axial direction are formed to face each other so that the other end is opened to the slider body (56a) Even if the guide protrusion 64b is formed on the slider body 56a by allowing the slider body 56a to be inserted into the piston 54 in the compressed state, the slider body 56a is easily attached to the piston 54. In addition to the assembly, the guide protrusion 64b may be easily fitted into the guide hole 64a.

At this time, the guide protrusion 64b is gently inclined so that the tip 64b 'is gently inclined so that the other end of the slider body 56a is inserted into one end of the piston 54 so as to be fitted into the guide hole 64a. When the other end of the slider body 56a is assembled inside one end of the piston 54, the rear end 64b ″ is formed stepped so as not to be detached from the guide hole 64a.

Next, the auxiliary damping member 66 is made of a material such as a sponge having a damping force less than the damping force of the damping member 62 and is installed to be fixed to an outer circumferential surface of one end of the piston 54 and the cylinder 52. It is installed to be compressed on the inner circumferential surface so that the piston 54 is frictionally moved inside the cylinder 52.

At this time, since the damping force of the damping member 62 is greater than the damping force of the auxiliary damping member 66, the piston 54 is within the set displacement in a steady state where the vibration of the tub 6 is relatively small. The friction damping movement inside the cylinder 52 by the auxiliary damping member 66 to attenuate the vibration of the tub 6, the slider 56 in a transient state where the vibration of the tub 6 is relatively large The vibration of the tub 6 is attenuated by frictional movement inside the cylinder 52 by the damping member 62 together with the piston 54.

Looking at the operation of the first embodiment of the damper assembly of the drum washing machine according to the present invention configured as described above are as follows.

First, as the motor 8 is operated in a state in which laundry is contained in the drum 7, the drum 7 is rotated to lift and drop the laundry by the lift 7a. The drum 7 is rotated at a high speed so that the washing water is discharged from the laundry by centrifugal force so that a dewatering stroke is performed.

At this time, as the drum 7 is rotated, vibration of the drum 7 is transmitted to the tub 6 side, and the tub 6 is supported by the spring 4 and the damper assembly 50 to vibrate. This is attenuated and not transmitted to the cabinet 2 side.

Specifically, the piston 54 is moved relative to the cylinder 52 and the slider 56 in a steady state in which the rotation speed of the motor 8 is constant and the vibration of the tub 6 is relatively small. The cylinder 52 and the slider 56 are integrally moved by the damping member 62, while the piston 54 is frictionally moved inside the cylinder 52 by the auxiliary damping member 66. The vibration of the tub 6 is attenuated.

On the other hand, the rotational speed of the motor 8 is variable so that the relative movement of the slider 56 and the piston 54 with respect to the cylinder 52 is generated in a transient state where the vibration of the tub 6 is relatively large, The slider 56 is frictionally moved inside the cylinder 52 by the damping member 62 while the piston 54 is frictionally moved inside the cylinder 52 by the auxiliary damping member 66. The vibration of the tub 6 is attenuated.

Of course, relative movement is generated between the slider 56 and the piston 54. The guide protrusion 64b is moved along the guide hole 64a while the relative movement between the slider 56 and the piston 54 is generated. Since the movement occurs, the slider 56 and the piston 54 have limited relative movement only within the displacement equal to the length of the guide protrusion 64b.

5 and 6 are a side cross-sectional view and an exploded perspective view showing a second embodiment of the damper assembly of the drum washing machine according to the present invention.

The second embodiment of the damper assembly of the drum washing machine according to the present invention is configured in the same manner as the first embodiment as shown in FIGS. 5 and 6, and is formed between the slider 56 and the piston 54. A stopper 74 which faces the piston 54 so that the slider 56 is frictionally moved inside the piston 54 within a set displacement, and is opposed to the slider 56; It consists of a guide hole (74b) formed to be long in the axial direction, and the fixing pin (74c) is fitted to the fixing hole (74a) and the guide hole (74b).

At this time, the fixing hole 74a is formed at one end side of the piston 54, and the guide hole 74b is formed in the slider body 56a in the axial direction by a predetermined length, and the fixing pin 74c. ) Is fixed to the fixing hole 74a and the guide hole 74b so that the slider 56 may perform a linear movement by a predetermined displacement in the axial direction with respect to the piston 54.

7 is a side sectional view showing a third embodiment of a damper assembly of a drum washing machine according to the present invention, and FIG. 8 is a side sectional view showing a fourth embodiment of a damper assembly of a drum washing machine according to the present invention.

The third embodiment of the damper assembly of the drum washing machine according to the present invention has the same configuration as that of the first embodiment as shown in FIG. 7, and is provided between the slider body 56a and the piston 54 to provide a slider. Shock absorbing means for alleviating the impact between the 56 and the piston 54, and is provided between the damping member mounting portion 56b and the piston 54 to mitigate the impact between the slider 56 and the piston 54 Auxiliary buffer means is further included.

Here, the buffer means is a coil spring (68) which is installed to be supported in the axial direction to the other end of the slider body (56a) and the piston 54, the auxiliary buffer means is a slider on one side of the damping member mounting portion (56b) It is an elastic member 69 made of rubber material fixed to the outer circumferential surface of the main body 56a.

Of course, the slider body 56a is formed such that the other end thereof is blocked in the axial direction, and the piston 54 is formed such that the piston holder 54a and the boundary portion thereof are blocked in the axial direction, so that the coil spring 68 To be supported.

Therefore, since the coil spring 68 and the elastic member 69 are installed between the slider 56 and the piston 54, the slider 56 and the piston (in the transient state where the vibration of the tub 6 is relatively large). If excessive relative movement occurs between 54, even if the slider 56 is excessively compressed by the piston 54, it is buffered by the coil spring 58 so that the guide protrusion 64b is guided by the guide hole 64a. It can be prevented from being damaged by hitting the end of the), it is buffered by the elastic member (69) can prevent the damping member mounting portion (56b) from hitting one end of the piston (54).

Meanwhile, the fourth embodiment of the damper assembly of the drum washing machine according to the present invention is configured in the same manner as the third embodiment as shown in FIG. 8, and is installed between the slider body 56a and the piston 54. A shock absorbing means for alleviating the impact between the slider 56 and the piston 54 is an air bag 78 in which air is injected into a closed space formed between the slider body 56a and the piston 54.

Of course, the slider body 56a is formed such that the other end thereof is blocked, and a closed space is formed between the slider body 56a and the piston 54 even when the slider 56 is fully relaxed from the piston 54. The formation position of the guide hole 64a and the guide protrusion 64b is determined.

The damper assembly of the drum washing machine according to the present invention configured as described above allows the slider to be frictionally moved by the damping member inside the cylinder in a transient state where the vibration of the tub is relatively high, and the piston is in the normal state where the vibration of the tub is relatively small. Since the friction is moved by the auxiliary damping member therein, there is an advantage that the damping force that is variable according to the vibration of the tub is applied to effectively attenuate the vibration of the tub.

In addition, the damper assembly of the drum washing machine according to the present invention has a guide protrusion formed on the slider to allow the slider to frictionally move inside the piston within a set displacement, and the piston may be guided in the state where the guide protrusion is fitted. Since the guide hole is formed long in the axial direction, the displacement that can move relatively between the slider and the piston is limited, there is an advantage to catch the excessive vibration of the tub.

In addition, the damper assembly of the drum washing machine according to the present invention cushions excessive relative movement between the slider and the piston because a cushioning means such as a coil spring or an air bag is installed between the slider and the piston and an auxiliary buffering means such as an elastic member is installed. It is possible to prevent damage to the components due to excessive vibration of the tub in advance, as well as to prevent the periodic noise.

1 is a side cross-sectional view showing a typical drum washing machine,

Figure 2 is a side sectional view showing a damper assembly of a drum washing machine according to the prior art,

3 and 4 are a side cross-sectional view and an exploded perspective view showing a first embodiment of a damper assembly of a drum washing machine according to the present invention;

5 and 6 are a side cross-sectional view and an exploded perspective view showing a second embodiment of the damper assembly of the drum washing machine according to the present invention;

7 is a side sectional view showing a third embodiment of a damper assembly of a drum washing machine according to the present invention;

8 is a side sectional view showing a fourth embodiment of the damper assembly of the drum washing machine according to the present invention.

<Explanation of symbols on main parts of the drawings>

52: cylinder 54: piston

56: slider 56a: slider body

56b: damping member mounting portion 62: damping member

64: stopper 64a: guide hole

64b: guide protrusion 66: auxiliary damping member

68: coil spring 69: elastic member

Claims (7)

Cylinders, A piston installed at one end of the cylinder to be movable; A slider installed at one end of the cylinder and movable at the other end of the piston; A damping member installed at one end of the slider to frictionally move the slider to the cylinder; A damper assembly of a drum washing machine, comprising an auxiliary damping member installed at one end of the piston to frictionally move the piston to the cylinder. The method of claim 1, The damper assembly of the drum washing machine further comprises a stopper formed in the slider and the cylinder to allow the slider and the piston to move relatively within a set displacement. The method of claim 2, The stopper is a damper assembly of the drum washing machine comprising a guide hole formed in the piston in the axial direction and a guide protrusion formed on the outer peripheral surface of the other end of the slider to be inserted into the guide hole and moved along the guide hole. . The method of claim 3, wherein The slider is a damper assembly of the drum washing machine, characterized in that the slot is formed long in the axial direction so that the other end of the slider is opened so that the guide protrusion is assembled to the guide hole in the state that the slider is compressed in the radial direction. The method of claim 4, wherein The guide protrusion is damper assembly of the drum washing machine, characterized in that the tip is gently inclined so that the other end of the slider is fitted to the guide hole as the other end is assembled to one end of the piston. The method of claim 2, The stopper is a damper assembly of the drum washing machine, characterized in that the fixing hole formed in the piston, the guide hole formed in the axial direction elongated in the slider, the fixing pin is fitted to the fixing hole and the guide hole. The method according to claim 1 or 2, The damper assembly of the drum washing machine is a damper assembly of the drum washing machine further comprises a shock absorbing means installed between the other end of the slider and the piston to mitigate the impact between the slider and the piston.