KR101051224B1 - Damper hinge structure of washing machine - Google Patents

Abstract

The present invention relates to a damper structure, and more particularly, to a damper hinge structure of a washing machine that effectively absorbs vibrations generated from the shaking of the drum when the drum washing machine is operated, thereby preventing the shaking of the tub directly transferred to the case. It is about.

The hinge structure of the washing machine damper according to the present invention includes a cylinder to which one end is connected by a tub side fixing part and a hinge pin; And a piston inserted into the cylinder, wherein the cylinder has an outer sleeve and a surface formed on an inner circumferential surface of the sleeve, and a surface in contact with the inner circumferential surface of the sleeve has a predetermined radius of curvature. It characterized in that it comprises a connecting portion consisting of a bushing is formed a groove for penetrating the hinge pin.

In addition, the damper hinge structure of the washing machine according to the present invention includes a piston having one end portion connected by a case side fixing portion and a hinge pin; And a cylinder accommodating the piston therein, wherein the piston is formed on an outer sleeve and an inner circumferential surface of the sleeve, and a surface in contact with the inner circumferential surface of the sleeve has a predetermined radius of curvature. It characterized in that it comprises a connecting portion consisting of a bushing is formed a groove for penetrating the hinge pin.

The damper structure of the washing machine according to the present invention has an effect of easily absorbing vibration even when the tub vibrates up and down or left and right as well as in the front and rear directions.

Tub, Drum, Sleeve, Bushing, Hinge Pin, Damper

Description

Damper hinge structure of washing machine {Hinge for damper of washing machine}

1 is a front sectional view schematically showing the structure of a typical drum washing machine.

2 is a perspective view showing a coupling structure of a washing machine and a damper according to a conventional general scheme.

3 is a cross-sectional view of the coupling structure.

Figure 4 is a perspective view schematically showing a drum washing machine having a damper hinge structure according to the spirit of the present invention.

5 is an enlarged perspective view showing a damper hinge structure according to the spirit of the present invention.

6 is a cross-sectional view showing the tub side hinge structure.

7 is a cross-sectional view showing an embodiment of the operation of the damper according to the spirit of the present invention.

8 is a sectional view showing yet another operating embodiment of the damper.

<Explanation of symbols for the main parts of the drawings>

100: washing machine 110: tub 120: drum

130: case 140: weight 150: spring

160: drive motor 200: damper 210: cylinder

220: piston 230: sleeve 240: bushing

250: hinge tube 260: friction surface 300: hinge pin

The present invention relates to a damper structure, and more particularly, to a damper hinge structure of a washing machine that effectively absorbs vibrations generated from the shaking of the drum when the drum washing machine is operated, thereby preventing the shaking of the tub directly transferred to the case. It is about.

The washing machine is mainly driven by the electric motor, and the washing, rinsing, and dehydration processes are carried out to remove the dirt on the clothes by using the action of detergent and water. Its components consist of a motor, a power unit, a machine that transfers energy to the laundry, a control unit to control the washing process, a water supply and drainage system, and a water supply and drainage system.

In addition, the washing machine is classified into a drum type, agitator type, and a pulsator type according to a washing method.

Stirring type is a method of washing by rotating the wing-shaped stirrer to the left and right in the center of the washing tank, whip winding method is to wash with water generated by rotating the disk-shaped pulsator. In the drum type, water and detergent and laundry are put inside the drum in which the plurality of protrusions are formed, and the washing machine is washed by the impact of falling and being lifted by the protrusions. This method has almost no damage to the laundry and has the advantage of using less water, and in recent years, its use is increasing.                         

1 is a front sectional view schematically showing a structure of a general drum washing machine, FIG. 2 is a perspective view illustrating a coupling structure of a washing machine and a damper according to a conventional general method, and FIG. 3 is a cross-sectional view of the coupling structure.

1, 2 and 3, the general drum washing machine 10 is a laundry is accommodated, the drive unit 11 is rotated by the power source, and the damper 20 to absorb the vibration generated from the drive unit 11 ) And a case 14 accommodating the drive unit 11 and the damper 20.

In detail, the damper 20 has an end portion connected to the driving portion 11 and a bottom surface of the case 14, and the end portion thereof is fixedly connected by hinges 12 and 13.

Hereinafter, the function and action of the drum washing machine will be described briefly.

First, when power is supplied to the washing machine 10, the drum (not shown) provided in the drive unit 11 starts to rotate, the laundry accommodated therein by the rotation of the drum rotates together. At this time, since the drum (not shown) is rotated at a low speed, if the laundry is placed above the drum while the drum is rotating, the laundry is dropped by gravity. Then, the falling laundry collides with the water contained in the tub, and the dirt contained in the laundry is separated by the impact force generated by the collision of the water and the laundry.

In addition, the drum is caused to rotate by the vibration, the vibration is absorbed by the damper (20).                         

In more detail, the damper 20 has a cylinder 21 connected at one end to the drive unit 11 by a hinge 12, a hinge at the bottom of the case 14, and the other end is inserted into the cylinder 21. A piston (not shown) connected by 13 is included.

Referring to the connection structure of the drive unit 11 side, the drive unit 11 is coupled to the cylinder 21 of the damper 20. The engaging portion of the cylinder 21 is an outer sleeve 18, a bushing 17 is inserted into the inner surface of the sleeve, and the inner surface of the bushing 17 is inserted, the hinge 12 is penetrated The central portion is composed of a hollow cylindrical hinge receiving tube 16 so as to be able to do so.

Here, the cylinder-side connection structure is found to have the same shape as the piston-side connection structure.

When the vibration is transmitted from the driving unit 11 by the connection structure as described above, the damper 20 absorbs the vibration by linearly reciprocating the cylinder and the piston. In addition, when the driving unit 11 vibrates up and down, the damper 20 absorbs vibration by rotating the hinge 12 about its axis.

In the case of the conventional damper as described above, vibration is controlled by two methods: vibration absorption by linear reciprocating motion and vibration absorption by rotational motion around the hinge.

However, due to the imbalance caused by the eccentricity of the laundry during washing or dehydration, the driving unit may swing back and forth, left and right and up and down.

Therefore, the conventional damper as described above absorbs vibration only by the linear reciprocating motion and the two-dimensional rotational motion, so that the damper does not control when the driving unit vibrates in the front and rear directions.

In addition, there is a problem that the walking phenomenon occurs that the vibration is transmitted directly to the case of the washing machine because the front and rear vibration of the drive unit is not controlled as described above and the whole washing machine is moved away from the floor.

The present invention has been proposed in order to solve the problems as described above, to provide a hinge structure of the damper which can be a three-dimensional rotational movement of the two hinge portions of the damper to control the vibration in all directions generated in the drive unit For the purpose of

The hinge structure of the washing machine damper according to the present invention for achieving the object as described above is a cylinder that is connected to one end by the tub side fixing portion and the hinge pin; And a piston inserted into the cylinder, wherein the cylinder has an outer sleeve and a surface formed on an inner circumferential surface of the sleeve, and a surface in contact with the inner circumferential surface of the sleeve has a predetermined radius of curvature. It characterized in that it comprises a connecting portion consisting of a bushing is formed a groove for penetrating the hinge pin.

In addition, the damper hinge structure of the washing machine according to the present invention includes a piston having one end portion connected by a case side fixing portion and a hinge pin; And a cylinder accommodating the piston therein, wherein the piston is formed on an outer sleeve and an inner circumferential surface of the sleeve, and a surface in contact with the inner circumferential surface of the sleeve has a predetermined radius of curvature. It characterized in that it comprises a connecting portion consisting of a bushing is formed a groove for penetrating the hinge pin.

The damper hinge structure of the washing machine according to the present invention having the above configuration has an advantage of effectively absorbing vibrations in all directions generated from the tub.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It should be understood, however, that there is no intention to limit the scope of the present invention to the embodiment shown, and that other embodiments falling within the scope of the present invention may be easily devised by adding, Can be proposed.

Figure 4 is a perspective view schematically showing a drum washing machine with a damper hinge structure according to the spirit of the present invention.

Referring to FIG. 4, a drum washing machine having a damper hinge structure according to the present invention includes a case 130, a tub 110 accommodated in the case 130, and a wash water therein, and the tub 110. It is formed inside of the) and includes a drum 120 to accommodate the laundry.

In detail, one end of the tub 110 is coupled to both sides of the tub 110, and the other end is coupled to the bottom of the case 130, and the tub 110 is attached to at least one side of the tub 110. Weight 140 for correcting the center of gravity of the), a drive motor 160 formed on the rear side of the tub 110 to provide power for the drum 120 to rotate, and the drum 120 ) Is formed on the rear surface, and one end is attached to the upper side of the pulley 170 and the tub 110 connected by the motor 160 and the belt 180 and the other end on the upper side of the case 130. It is attached is further included a spring 150 for buffering the vibration generated in the tub 110 and the drum 120.

The operation of the washing machine according to the present invention having the above configuration will be described.

First, when power is applied to the drive motor 160 to rotate, the pulley 170 connected to the drive motor 160 and the belt 180 rotates, and the drum connected to the central axis of the pulley 170. 120 will rotate together.

As described above, since the drum 120 rotates at a low speed, the laundry inside the drum 120 is also rotated to be located above the drum 120 and fall down by gravity. . The dirt from the laundry will fall by the impact of the fall.

In addition, the spring 150 is coupled to the upper side of the tub 110 serves to absorb the vibration or shaking caused by the rotation of the drum (120). In addition, the weight (140) attached to at least one side of the outer circumferential surface of the tub 110 to correct the center of gravity of the tub 110 to match the center of gravity of the tub 110, the eccentric of the tub 110 It serves to eliminate vibrations that can be generated due to the center of gravity.

Figure 5 is an enlarged perspective view showing a damper hinge structure according to the spirit of the present invention, Figure 6 is a cross-sectional view showing a tub side hinge structure.

5 and 6, the damper 200 according to the present invention includes a cylinder 210 coupled by a tub side fixing part 115 and a hinge pin 300, and a reciprocating motion in the cylinder 210. And, the other end is composed of a piston 220 coupled by the case side fixing portion 116 and the hinge pin 300.

As shown in FIG. 6, the cylinder-side connection part will be described in detail. The cylinder-side connection part is formed at the end of the body of the cylinder 210 to form the outermost sleeve 230 and the inner circumferential surface of the sleeve. And a bushing 240 having a constant radius of curvature and having a rounded ball joint shape and a portion in surface contact with the inner circumferential surface of the sleeve, inserted into the inner circumferential surface of the bushing, and having a hinge pin 300 penetrating the central portion thereof. Hinge receiving tube 250 is included.

In addition, the friction surface 260 in contact with the sleeve 230 and the bushing 240 may be coated with a lubricant, or a ball bearing may be formed on the inner surface of the sleeve 230.

The configuration of the piston side connecting portion is also made up of the sleeve, bushing and hinge receiving tube in the same manner as the cylinder side connecting portion.

The damper has a primary buffering function as the piston 220 is pushed into the cylinder 210 when the tub 110 vibrates, and the hinge pin 300 when the tub 110 vibrates up and down. ) Secondary cushioning function while rotating clockwise or counterclockwise with the axis. When the tub 110 vibrates back and forth, the sleeve 230 flows back and forth along the outer circumferential surface of the bushing 240.

7 is a cross-sectional view showing an embodiment of the operation of the damper according to the spirit of the invention, Figure 8 is a cross-sectional view showing another embodiment of the operation of the damper.                     

7 and 8 respectively show the state of the hinge structure of the damper 200 when the tub 110 vibrates forward, and the state of the hinge structure of the damper 200 when the tub 110 vibrates backward. To represent each.

As illustrated, when the tub 110 vibrates forward, the sleeve 230 rotates counterclockwise by riding on the outer circumferential surface of the bushing 240. When the tub 110 vibrates backward, the sleeve rotates clockwise along the outer circumferential surface of the bushing 240. The piston side connection part, not shown, also rotates in the same manner as the tub side connection part.

As described above, in order to smoothly rotate the sleeve 230 along the outer circumferential surface 260 of the bushing 240, a lubricant may be applied or a bearing may be inserted into the inner circumferential surface of the inner sleeve 230.

By the damper structure of the washing machine according to the present invention having the configuration as described above there is an effect that can easily absorb the vibration even when the tub vibrates up and down or left and right, as well as in the front and rear direction.

In other words, when the tub vibrates in the front-back direction, the sleeve of the damper according to the present invention can absorb the vibration by rotating along the outer circumferential surface of the bushing.

Claims (4)

A cylinder 210 having one end connected to the tub side fixing part 115 and the hinge pin 300; And Includes; the piston 220 is inserted into the cylinder 210, The cylinder 210, and the sleeve 230 forming the outermost appearance of the cylinder 210, A bushing 240 formed on an inner circumferential surface of the sleeve 230, and a surface in contact with the inner circumferential surface of the sleeve 230 has a predetermined radius of curvature, and a central portion of the bushing 240 in which a groove for penetrating the hinge pin 300 is formed. When the tub 110 vibrates forward or backward, the sleeve 230 rotates on the outer circumferential surface of the bushing 240 to dampen the front and rear vibration of the tub 110. Damper hinge structure of the washing machine characterized in that there is. A piston 220 having one end connected to the case side fixing part 116 and the hinge pin 300; And It includes; a cylinder 210 for receiving the piston 220 therein, The piston 220, the sleeve 230 forming the outermost outer shape of the piston 220, A bushing 240 formed on an inner circumferential surface of the sleeve 230, and a surface in contact with the inner circumferential surface of the sleeve 230 has a predetermined radius of curvature, and a central portion of the bushing 240 in which a groove for penetrating the hinge pin 300 is formed. When the tub 110 vibrates forward or backward, the sleeve 230 rotates on the outer circumferential surface of the bushing 240 to dampen the front and rear vibration of the tub 110. Damper hinge structure of the washing machine characterized in that there is. The method according to claim 1 or 2, Damper hinge structure of a washing machine, characterized in that it further comprises a hinge receiving tube 250 is inserted into the inner circumferential surface of the bushing 240 so that the hinge pin 300 is accommodated. The method of claim 1, Damper hinge structure of the washing machine is formed on the inner circumferential surface of the sleeve 230 in surface contact with the outer circumferential surface of the bushing 240, a bearing for reducing friction generated between the bushing 240 and the sleeve 230 .

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