KR101219372B1 - Clothes Washing Machine and Balancer Usable With Washing Machine - Google Patents

Abstract

The present invention discloses a washing machine having a balancer, which can prevent the fusion residue from flowing into the oil injection hole when the cap is welded to the oil injection portion for injecting oil.

The washing machine according to the present invention includes a balancer, wherein the balancer is at least one oil injection portion having an oil injection hole into which oil is injected, and the cap is fused to the oil injection portion to prevent oil from flowing out of the oil injection hole. And an oil injection hole forming the oil injection hole and having an inflow prevention jaw preventing the fusion dreg from flowing into the oil injection hole when the oil injection part and the cap are fused.

Description

 Balancer Washing Machine and Balancer Usable With Washing Machine}

1 is a cross-sectional view showing a schematic structure of a drum washing machine according to the present invention.

Figure 2 is a perspective view showing a state in which the balancer is coupled to the rotating tub according to the present invention.

3 is an exploded perspective view of a balancer according to the present invention.

4 is a perspective view taken along II-II in FIG. 3;

5 is a cross-sectional view after the cap is fused to the oil injection unit in FIG.

Description of the Related Art [0002]

10: rotating tank 20: balancer

21: Ball 30: First housing

40: second housing 50: oil injection portion

51: oil injection hole 52: inflow prevention jaw

53: fusion protrusion 54: fusion groove

60: cap 61: insertion portion

62: accommodating part 63: fusion part

The present invention relates to a washing machine having a balancer, and more particularly, to a washing machine having a balancer such that fusion dregs are not introduced into the balancer through an oil inlet for injecting oil.

In general, a washing machine rotates a rotating tub containing laundry with a driving motor to wash the laundry. When the washing process is completed, the washing tub is rotated at a high speed to dehydrate the laundry.

During the dehydration process, the rotating tub rotates at a high speed while the laundry is not evenly distributed in all areas of the rotating tub, but is concentrated in a specific part, or the rotating tub rotates at a high speed while the laundry is pushed to one side by the rapid rotation of the rotating tub early in the dehydration process. If the center of gravity of the rotating tub and the center of rotation do not coincide with each other, it causes vibration and noise, and if this phenomenon is repeated, components including the rotating tub, the rotating shaft, and the driving motor may fail or shorten the lifespan.

In particular, the drum type washing machine has a structure in which the rotating tub in which the laundry is placed is horizontally arranged so that the laundry rotates at high speed in the state where the laundry is collected at the bottom of the rotating tub by gravity during dehydration, so that the center of gravity and the rotation center do not coincide with each other. As a result, the possibility of vibration and noise is very high.

Therefore, a vertical shaft type washing machine including a drum type washing machine installed vertically is usually provided with a balancer for maintaining a dynamic balance of the rotating tank.

An example of a washing machine equipped with such a balancer is Korean Patent Laid-Open Publication No. 1999-0038279. The ball balancer of the conventional washing machine has a racer installed on the upper and lower portions of the rotating tub to maintain a dynamic balance when the rotating tub rotates at a high speed, and has a ball and viscosity of steel material disposed freely in the racer. It is configured with oil. In order to inject the oil, the racer was formed with at least one oil injection hole, the oil was injected through the hole, the oil was filled, and the stopper and the same material as the racer were closed and fused.

However, when the oil injection hole is plugged and fused, the fusion dregs generated during welding flow into the racer, and the dregs dripped into the racer interfere with the movement of the ball in the racer and at the same time, It caused noise.

The present invention is to solve the problems of the prior art as described above, an object of the present invention is to provide a washing machine having a balancer that can prevent foreign matter from flowing into the balancer when the oil injection hole is blocked and fused. To provide.

Washing machine according to the present invention for achieving the above object is a washing machine comprising a balancer, wherein the balancer is at least one oil injection unit having an oil injection hole into which oil is injected, the oil injection unit is fused to the And a cap that prevents oil from flowing out of the oil injection hole, wherein the oil injection portion forms the oil injection hole, and prevents fusion dregs from entering the oil injection hole when the oil injection portion and the cap are fused. It has an inflow prevention jaw.

The oil injection unit may further include a fusion protrusion spaced apart from the inflow prevention jaw and forming a concentric circle with the inflow prevention jaw, and a fusion groove formed between the inflow prevention jaw and the fusion protrusion.

In addition, a tapered portion inclined downward in the inner direction of the fusion groove is formed in the outer lower portion of the fusion groove.

In addition, the cap has an insertion portion inserted into the oil injection hole, a receiving portion for receiving the inflow prevention jaw, and a fusion portion that is inserted and adhered to the fusion groove and fused with the fusion groove.

Further, only the fusion portion and the fusion groove are in close contact with each other so that only the fusion portion is fused to the fusion groove.

In addition, the oil injection portion and the cap are fused to each other by ultrasonic welding.
In addition, the washing machine according to the spirit of the present invention is installed in the housing; and the inside of the housing, the tank for receiving water therein; and disposed to be rotatable in the interior of the tank, is provided along the outer rim of the rotating tank A rotating tub having an annular recess; and a balancer having an annular coupling to the recess of the rotating tub; wherein the balancer is formed of a plastic material and coupled to each other to form a space therein; A balancer housing having a second housing, a plurality of balls and oil disposed to be movable in the inner space of the balancer, at least one oil injecting portion for injecting the oil into the balancer, and the oil injection A cap covering the oil injection portion to prevent the oil from leaking through the portion, wherein the at least one One injection portion is characterized in that it comprises an oil injection hole formed in the balancer housing and the inflow prevention jaw formed around the oil injection hole to prevent foreign matter from entering the internal space of the balancer through the oil injection hole .
The balancer housing may include an outer circumferential wall that supports the centrifugal force acting on the plurality of balls and the oil when the balancer rotates, and the at least one oil injection unit may be provided at a portion other than the outer circumferential wall of the balancer housing. have.
The oil injection unit may be provided in plurality, and the plurality of oil injection units may be arranged in the circumferential direction of the balancer.
The plurality of oil injection units may be disposed within 90 degrees in the circumferential direction of the balancer.
The inner space of the balancer may have a rectangular cross section.
The rotating tub includes a cylindrical body and a front member and a rear member disposed respectively at the front and the rear of the body, and the annular recess is formed at the front member and the rear member of the rotary tub, respectively, and the balancer Is provided in plurality, each balancer may be coupled to the annular recess formed in the front member and the rear member.
The oil injection portion further includes a fusion groove formed on the outer circumference of the inflow prevention jaw, the cap is inserted into the oil injection hole, and the protruding to be inserted into the fusion groove of the oil injection portion and the fusion groove It may include a fusion to be fused.
In addition, a balancer for a washing machine according to the spirit of the present invention, in the washing machine balancer that can be mounted in an annular recess formed in the rotating tub of the washing machine, an opening, first and second walls facing each other, and the first wall A first housing having a third wall formed between the second wall and the second housing, the second housing being coupled to the first housing to cover the opening of the first housing and forming a space in the balancer; A plurality of balls movably disposed in the inner space of the balancer; and oil injected into the inner space of the balancer; and at least one oil injection unit formed in one of the first housing and the second housing; and the And a cap fused to the oil injection unit to prevent leakage of the oil injected into the internal space of the balancer, wherein the at least one oil injection unit is connected to the internal space of the balancer. And an oil injection hole formed to communicate with the oil injection hole, and an inflow prevention jaw protruding around the oil injection hole to prevent the welding dregs from flowing into the oil injection hole when the cap is welded to the oil injection unit.
When the balancer is mounted in the washing machine, the first wall of the first housing is disposed outside of the second wall with respect to the radial direction of the rotating tub, and the at least one oil injection portion is excluded from the first wall. It can be formed in the part.
The at least one oil injection unit may be formed in the first housing.
The oil injection unit further includes a fusion groove formed around the inflow prevention jaw, wherein the cap is an insertion portion inserted into the oil injection hole, a receiving portion formed around the insertion portion to accommodate the inflow prevention jaw; It may include a fusion portion protruding to be inserted into the fusion groove of the oil injection portion and formed around the receiving portion.

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

1 is a cross-sectional view showing a schematic structure of a washing machine according to the present invention.

As shown in FIG. 1, the washing machine according to the present invention includes a housing 1 forming an external appearance, a water tank 2 installed inside the housing 1 and containing wash water, and an inside of the water tank 2. It is rotatably disposed and has a rotating tub (10) to put the laundry into the laundry and a door (4) hinged to the open front of the housing (1).

In the upper part of the water tank 2, a water supply pipe 5 for supplying washing water and detergent to the water tank 2 and a detergent supply device 6 are disposed, and in the lower part of the water tank 2, when the washing operation of the laundry is completed, the water tank ( A drain pipe 7 for discharging the wash water contained in 2) to the outside of the housing 1 is installed.

The rear side of the rotating tank 10 is disposed so that the rotating shaft 8 extends through the rear side of the water tank 2, and a drive motor 9 to which the rotating shaft 8 is coupled to the outer side of the rear water tank 2 is installed. Accordingly, when the driving motor 9 is operated, the rotating shaft 8 rotates to rotate the rotating tub 10 together.

A plurality of dehydration holes (10a) is formed on the circumferential surface of the rotary tub 10, during the washing stroke water contained in the water tank (2) flows into the interior of the rotary tub (10) and is washed by water in which detergent is dissolved This can be done, and during the dehydration stroke, the water can be drained out of the housing 1 through the drain pipe 7.

As the plurality of lifters 10b are disposed in the longitudinal direction inside the rotary tub 10, the laundry soaked with water is rotated upward from the bottom of the rotary tub 10 as the rotary tub 10 rotates at a low speed during the washing stroke. It is pulled up and dropped back to the bottom of the rotating tub 10 so that the laundry can be washed effectively.

Therefore, in the washing stroke, the rotating shaft 8 rotates in a reverse direction from the forward direction by the driving motor 9 to wash the laundry by rotating the rotating tub 10 at low speed. The laundry is dehydrated by rotating the rotary tub 10 at high speed while rotating in the direction.

When the rotating tub 10 rotates at a high speed in the dehydration process, the center of gravity of the rotating tub 10 itself does not coincide with the center of rotation, or when the laundry is not evenly distributed in the rotating tub 10 and is driven to a specific area, the rotating tub 10 (10) fails to maintain a dynamic balance.

The balancer 20 according to the present invention is installed at the front and rear ends of the rotating tub 10 in order to prevent such dynamic unbalance so that the rotating center and the center of gravity of the rotating tub 10 can be rotated at high speed. do.

The configuration and coupling structure of the balancer 20 of the present invention will be described with reference to FIGS. Figure 2 is a perspective view of the balancer is separated in the rotary bath according to the present invention, Figure 3 shows an exploded perspective view of the balancer shown in FIG.

As shown in FIG. 2, the rotating tub 10 has a cylindrical body 11 in which the whole and the rear part are opened and the dehydration hole 10a and the lifter 10b are provided, and in the entire opened part of the body 11. Coupled to the front member 12 provided with an opening 14 for allowing laundry to be introduced into or taken out of the body 11, and coupled to the open rear portion of the body 11 and rotating the tub 10. It is provided with a rear member 13 to which a rotating shaft 8 (see FIG. 1) for rotation is coupled.

In the rim of the front member 12 is provided with an annular recess 15 formed in an approximately 'c' cross-section and open toward the front so that the balancer 20 is accommodated, and the rear member 13 In the same manner, an annular recess 15 (not shown) that is open toward the rear for accommodating the balancer 20 is also provided at the edge of the.

The front and rear members 12 and 13 are fitted to the front and rear edges of the body 11, respectively.

As shown in FIG. 3, the balancer 20 according to the present invention includes an annular first housing 30 and an annular second housing 40 that is fused and coupled to the first housing 30. One annular housing corresponding to the recess 15 (refer to FIG. 2) of the rotating tub 10 is formed. The first and second housings 30 and 40 are injection-molded synthetic resin such as plastic. Is made.

The annular balancer 20 has a plurality of flanges 22 having a screw hole 22a at an inner circumference thereof, and has an annular shape provided at the front member 12 and the rear member 13 of the rotating tub 10. Screwed to the recess 15 is assembled.

Inside the balancer 20, a plurality of metal balls 21 having a balancing function and oil having viscosity to prevent the balls 21 from colliding strongly with each other to adjust the moving speed of the plurality of balls 21. O) is filled.

In order to insert the ball 21 into the balancer 20, the second housing 40 is fused to the first housing 30 while the ball 21 is inserted into the first housing 30. On the other hand, since the oil is hard to fill in a state in which the first housing 30 and the second housing 40 are separated, the first housing 30 and the second housing 40 are formed on the inner circumference of the first housing 30. After fusion, an oil injection unit 50 for injecting oil is formed.

The oil is injected through the oil injection hole 51 formed in the oil injection unit 50 after the first housing 30 and the second housing 40 are fused. In order to inject the oil well, the oil injection unit 50 is formed. It is preferable that two or more are formed. After the oil is injected into the balancer 20, the cap 60 is fused with the oil inlet 50 to prevent the oil inside the balancer 20 from leaking.

4 is a perspective view taken along line II-II of FIG. 3.

As shown in FIG. 4, the oil injection unit 50 forms an oil injection hole 51 and prevents the inflow of foreign substances when the cap 60 and the oil injection unit 50 are fused. And a fusion protrusion 53 spaced apart with a larger diameter than the inflow prevention jaw 52 and forming a concentric circle with the inflow prevention jaw 52, and a fusion dreg formed between the inflow prevention jaw 52 and the fusion protrusion 53. The gathering has a fusion groove 54.

The cap 60 fused to the oil injection portion 50 is inserted into the oil injection hole 51 to block most of the oil injection hole 51, and extends from the insertion portion 61 and prevents the inflow prevention jaw. And an accommodating part 62 accommodating 52 and a fusion part 63 formed at the outermost part of the cap 60 and inserted into the fusion groove 54 to be in close contact with the fusion groove 54.

On the other hand, when the fusion of the cap 60 and the oil injection unit 50 may be used, such as thermal fusion, ultrasonic fusion using ultrasonic welding, such as fusion by heat, cap 60 by ultrasonic fusion does not generate much fusion residues It is preferable to fuse the oil injection portion 50 with.

In order to perform ultrasonic welding, the cap 60 and the oil injection unit 50 are in close contact with each other to melt the close contact using ultrasonic waves. In the present invention, the fusion groove 54 of the oil injection unit 50 is melted. Only the fusion portion 63 of the cap 60 is in close contact with each other so that the fusion dregs are formed on the outside of the inflow preventing jaw 52. As such, the tapered portion 55 inclined downward in the inward direction of the fusion groove 54 is formed at the outer lower portion of the fusion groove 54 such that only the fusion groove 54 and the fusion portion 63 are fused together. By forming the taper portion 55 as described above, in the state where the cap 60 blocks the oil injection portion 50, only the fusion portion 63 is fused to the fusion groove 54.

5 is a cross-sectional view showing a state in which the cap is fused by ultrasonic welding to the oil injection unit.

As shown in FIG. 5, only the fusion unit 63 in the cap 60 is adhered to the fusion groove 54 to be fused, and fusion dregs A generated at the fusion are formed only outside the inflow preventing jaw 52. Therefore, the fusion residue A cannot be introduced into the oil inlet 51 by the inflow preventing jaw 52 and is collected in the fusion groove 54.

According to the washing machine according to the present invention as described in detail above, since the fusion residue can be prevented from flowing into the oil injection hole when the cap is welded to the oil injection portion having the oil injection hole is injected oil, the fusion residue is balancer By entering it inside, you can prevent the balancer from working properly.

Claims (20)

In the washing machine containing a balancer, The balancer includes at least one oil injection portion having an oil injection hole into which oil is injected, and a cap fused to the oil injection portion to prevent oil from flowing out of the oil injection hole, And the oil injection unit forms the oil injection hole and has an inflow preventing jaw preventing the fusion dreg from entering the oil injection hole when the oil injection unit and the cap are fused. The method of claim 1, The oil injection unit washing machine further comprises a fusion protrusion spaced apart from the inflow preventing jaw and forming a concentric circle with the inflow preventing jaw, and a fusion groove formed between the inflow preventing jaw and the fusion protrusion. 3. The method of claim 2, Washing machine, characterized in that formed in the outer lower portion of the fusion groove inclined downward in the inward direction of the fusion groove. 3. The method of claim 2, The cap is a washing machine characterized in that it has an insertion portion inserted into the oil injection hole, a receiving portion for receiving the inflow preventing jaw, and a fusion portion that is inserted and adhered to the fusion groove and fused with the fusion groove. 5. The method of claim 4, Only the fusion portion and the fusion groove is in close contact with each other so that only the fusion portion is fused to the fusion groove. The method of claim 1, Washing machine, characterized in that the oil injection portion and the cap are fused to each other by ultrasonic welding. housing; A water tank installed inside the housing and containing water; A rotating tank disposed rotatably inside the tank and having an annular recess provided along an outer circumferential edge of the rotating tank; and And a balancer having an annular shape to be coupled to the recess of the rotary tub. The balancer is formed of a plastic material, the balancer housing having a first housing and a second housing coupled to each other to form a space therein, a plurality of balls and oil disposed to be movable in the inner space of the balancer; At least one oil injecting portion for injecting the oil into the inner space of the balancer, and includes a cap covering the oil inlet to prevent the oil from leaking through the oil inlet, The at least one oil injection unit includes an oil injection hole formed in the balancer housing and an inflow prevention jaw formed around the oil injection hole to prevent foreign substances from entering the internal space of the balancer through the oil injection hole. Washing machine characterized in that. 8. The method of claim 7, The balancer housing includes an outer circumferential wall that supports the centrifugal force acting on the plurality of balls and oil when the balancer rotates, The at least one oil injection unit is provided in a portion of the balancer housing except the outer peripheral wall. 8. The method of claim 7, The oil injection unit is provided in plurality, The plurality of oil injection unit is characterized in that arranged in the circumferential direction of the balancer. 10. The method of claim 9, The plurality of oil injection unit is characterized in that disposed within 90 degrees in the circumferential direction of the balancer. 8. The method of claim 7, Washing machine, characterized in that the inner space of the balancer has a rectangular cross section. 8. The method of claim 7, The rotating tub includes a cylindrical body and a front member and a rear member disposed respectively at the front and the rear of the body, The annular recess is formed in each of the front member and the rear member of the rotating tub, The balancer is provided in plural, each balancer is coupled to the annular recess formed in the front member and the rear member. 8. The method of claim 7, The oil injection unit further comprises a fusion groove formed on the outer circumference of the inflow prevention jaw, The cap is a washing machine characterized in that it comprises a fusion portion protruding to be inserted into the fusion groove and the fusion groove is inserted into the oil injection hole and the fusion groove. In the balancer for a washing machine which can be mounted in the annular recess formed in the rotating tub of the washing machine, A first housing having an opening, a first wall and a second wall facing each other, and a third wall formed between the first wall and the second wall; A second housing coupled to the first housing to cover the opening of the first housing to form a space in the balancer; A plurality of balls movably disposed in an inner space of the balancer; Oil injected into the inner space of the balancer; At least one oil injection unit formed in one of the first housing and the second housing; And a cap fused to the oil injection unit to prevent the oil injected into the balancer from leaking out. The at least one oil injection portion is formed in communication with the inner space of the balancer, and when the cap is welded to the oil injection portion in the circumference of the oil injection hole to prevent the fusion dregs to enter the oil injection hole Balancer for a washing machine comprising a protruding inflow prevention jaw. 15. The method of claim 14, When the balancer is mounted to the washing machine, the first wall of the first housing is disposed outside of the second wall with respect to the radial direction of the rotating tub, The at least one oil injection portion is a balancer for a washing machine, characterized in that formed on the portion except the first wall. 15. The method of claim 14, The at least one oil injection unit is a balancer for a washing machine, characterized in that formed in the first housing. 15. The method of claim 14, The oil injection unit is provided in plurality, The plurality of oil injection portion balancer for a washing machine, characterized in that arranged in the circumferential direction of the balancer. The method of claim 17, The plurality of oil injection portion is a balancer for a washing machine, characterized in that disposed within 90 degrees in the circumferential direction of the balancer. 15. The method of claim 14, Balancer for a washing machine, characterized in that the inner space of the balancer has a rectangular cross section. 15. The method of claim 14, The oil injection unit further includes a fusion groove formed around the inflow preventing jaw, The cap has an insertion portion inserted into the oil injection hole, a receiving portion formed around the insertion portion to accommodate the inflow preventing jaw, and protruding to be inserted into the fusion groove of the oil injection portion and formed around the accommodation portion. Balancer for a washing machine comprising a fusion unit.

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