KR0134130Y1 - A balancing device of drum type washing machine - Google Patents

Abstract

An object of the present invention is to prevent the wear and corrosion caused by surface oxidation by not exposing the welded portion for sealing between races in mounting the ball balancer of the drum washing machine.

A drum-shaped fixing tub 20 is suspended in the main body case 10, and a rotating tub 30 is installed in the fixing tub 20. Groove races 41a and 41b concentrically provided with the rotating tub are formed on the front plate 31 and the rear plate 32 of the rotating tub 30, and a plurality of rolling elements 42 are provided in the race as moving materials. Is inserted. The lace is formed by the first plate 43 and the second plate 44 overlapped, and the combination of the first plate and the second plate is inserted into the front plate and the back plate, respectively. To this end, an inward groove 31b is formed in the front plate and the rear plate, and the race forming portion of the combination of the first plate and the second plate is inserted into the inward groove.

Description

Balancing Device for Drum Washing Machine

1 is a perspective view of a conventional drum washing machine.

2 is a cross-sectional view of the drum washing machine according to the present invention.

3 is a main detail view of the balancing device of the drum washing machine according to the present invention.

* Explanation of symbols for main parts of the drawings

20: fixed tank 30: rotating tank

31: Front panel 32: Rear panel

41a, 41b: race 42: rolling element

43: First Edition 44: Second Edition

The present invention relates to a drum washing machine, and more particularly, to a balancing device for a drum washing machine to provide a plurality of steel balls and laces as rolling elements at both ends of the rotating tub to perform balancing during washing and dehydration.

Drum washing machine is a device that performs the washing by the free fall caused by the rotation of the rotating tub having a drum-shaped, washing, rinsing, dehydration is automatically performed according to a pre-programmed. During the dehydration operation of the drum washing machine, a balancing device is essential for the drum washing machine because severe vibration and noise may occur due to the eccentricity of the laundry.

1 is a perspective view showing a balancing structure of a conventional drum washing machine. Referring to this, the fixing tank (3) in which the drum-shaped rotating tank (2) is built into the main body case (1) is suspended by the upper side gas spring (4), and by the lower shock absorber (5). I'm supportive. The rotating tub 2 is driven by a motor 6 installed on the bottom of the case 1, and a rotating shaft (not shown) and a pulley behind the rotating tub to transfer the rotational force of the motor 6 to the rotating tub 2. (Not shown) is installed. A plurality of small holes 7 are formed over the entire surface of the rotary tub 2, and a plurality of inwardly bent lifters 8 are arranged at predetermined intervals. The small holes 7 guide the water to flow through the fixing bath 3 and the rotating tank 2 during washing, and the centrifuged water from the laundry in the rotating tank 2 is released into the fixing tank 3 during dewatering. To guide. The lifter 8 functions to lift and drop the laundry.

It is also equipped with a balance added to the fixing tank (3) to prevent vibration occurring during washing and dehydration. This counterweight consists of a front balance weight (9a) attached to the front of the fixing tank (3) and the upper balance weight (9b) attached to the upper side of the fixing tank (3), each having a weight of about 11.4kg and 12.2kg . The material of this counterweight is cast iron, and is attached to the fixing tank 3 using the bolt 9c or the like.

However, such a conventional drum washing machine has the following problems. First, as described above, the weight of the counterweight is very large, so that the installation work is difficult, and as a whole, the weight of the product is increased, making it difficult to handle in the distribution process. Second, the amount of eccentricity of the laundry during washing or dehydration and the vibration thereof are directly transmitted to the fixing tank, and the balancing effect is lowered because the amount of eccentricity and the vibration are simply suppressed or attenuated by the weight of counterweight. Third, because the balance weight is bolted to the fixing tank, the coupling state of the balance weight is loosened due to the corrosion or fatigue phenomenon of the fastening portion generated by using for a long time, the noise occurs, and in severe cases there is a problem that is broken.

Therefore, the present invention is to solve the above-mentioned problems, the main purpose of the present invention is to arrange a plurality of rolling elements in the rotating tank and to configure these rolling elements to move freely in the direction opposite to the eccentric direction of the laundry generated during washing or dehydration process It is to provide a balancing device for a drum washing machine that can effectively maintain the balance in response to the eccentric amount of the laundry to suppress the generation of vibration and noise as much as possible.

Another object of the present invention is to form a race for guiding the movement of a rolling element, which prevents the welding part or the fastening part from being exposed to the wash water, thereby preventing wear or corrosion caused by surface oxidation. It is to provide a balancing device.

Balancing device of the drum washing machine according to the present invention for achieving the above object, a drum-shaped fixing tank suspended in the main body case, a rotating tank rotatably installed in the fixing tank, the rotation on the front plate and the back plate of the rotating tank A groove-shaped race concentrically provided with a jaw, a plurality of rolling elements inserted into the race as a moving material, a first plate and a second plate superimposed to form the race, and the first plate and the second plate The combination of the is disposed on the outer surface of the front plate and the back plate, respectively, characterized in that the coupling portion of the first plate and the second plate is coupled so as not to be exposed to the inside of the rotary tub.

In addition, the balancing device of the present invention is characterized in that the inward groove is formed in the front plate and the rear plate and the race portion of the combination of the first plate and the second plate is inserted into the inward groove.

In addition, the balancing device of the present invention is characterized in that in the aforementioned balancing device, the two plate coupling bodies, the front plate and the back plate are bolted to the outside of the rotating tub.

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

Referring to FIG. 2, a drum-shaped fixing tub 20 is suspended inside the main body case 10. A plurality of suspension gas springs 11 are provided for suspension of the fixing tank 20, and upper ends of the respective suspension gas springs 11 are suspended from the ceiling of the case 10, and lower ends thereof are coupled to the outer circumferential surface of the fixing tank 20. In addition, the shock absorbing 12 is installed below the fixing tank 2.

The rotating tub 30 is rotatably installed inside the fixed tub 20. The rotating tub 30 includes a front plate 31 and a rear plate 32, and a side plate 33 connecting them. The front plate 31 is formed with an opening 31a for inputting and withdrawing laundry. In the side plate 33, a plurality of small holes 33a are formed over the entire surface, and a plurality of lifters 33b bent inwardly in a V shape are arranged at predetermined intervals. The small holes 33a guide water to the fixing tank 20 and the rotating tank 30 during washing, and during dewatering, the centrifuged water is separated from the laundry in the rotating tank 30 to the fixing tank 20. To guide. The lifter 33b serves to lift and drop the laundry. The rotating shaft 34 is coupled to the back plate 32. The rotary shaft 34 is supported by a bearing 23 installed in the bearing housing 21 coupled with the fixing tank 20, and a pulley 35 is installed at the end. The belt 36 is coupled to the pulley 35 to transmit the rotational force of the motor 37 to the rotation shaft 34.

Balancing means 40 for solving the imbalance caused by the eccentricity of the laundry during the washing or dehydration process is provided on the front plate 31 and the rear plate 32, respectively. The balancing means 40 is a groove-shaped race (RACE) 41a and 41b formed concentrically with the rotating tub 30 on the front plate 31 and the rear plate 32 of the rotating tub 30. A plurality of rolling elements 42 inserted into the race 41a and 41b as moving materials are included. Two races 41a and 41b are provided on the inner side and the outer side, the inner race 41a protrudes inward and the outer race 41b protrudes outward. The inner race 41a and the outer race 41b are spaced a predetermined interval apart and are sealed by welding. In addition, oil is filled in the races 41a and 41b. As the rolling element 42, an unshaped steel ball is used. Instead of metal balls, rollers may be used, or they may be made of plastic.

Next, the coupling structure of the lace will be described in detail with reference to FIG. The race is constituted by a pair of plate coupling bodies 45 composed of the first plate 43 and the second plate 44. Each assembly 45 is inserted and coupled to the outer surface of the front plate 31 and the back plate 32, respectively, the coupling structure in the front plate 31 and the coupling structure in the back plate 32 is the same. Therefore, the coupling structure in the back plate 32 is omitted, and only the coupling structure in the front plate 31 will be described. An inward groove 31b is formed in the front plate 31, and a portion forming the inner race 41a of the combination 45 of the first plate 43 and the second plate 44 is the inward groove 31b. Is inserted into That is, the front plate 31 is provided with an inward groove 31b protruding toward the inside of the rotating tub 30, and the inner race 41a portion of the plate coupling body 45 is coupled to the inward groove 31b to be judged. The weld joint of the coalescing 45 is not exposed inside the rotating tub 30. Therefore, the wash water does not come into contact with the welded portion, thereby preventing surface oxidation and corrosion of the portion, and the inner surface of the rotating tub 30 is smoothed. As described above, the coupling structure is the same in the rear plate, so that the welding coupling portion of the judgment plate of the rear plate is not exposed to the inside of the rotating tub.

The plate coupling body 45 and the rotary tub 30 inserted in this way are fastened by one bolt 46 to maintain a firm coupling state. That is, the bolt 46 penetrates the portion where the races 41a and 41b are not formed, the head 46a is located at the rear of the back plate 32, and the end portion of the bolt 46 is located at the front of the front plate 31. 47). At this time, by placing the bolt 46 in the groove of the lift (33b) should not be exposed to the interior of the rotating tub (30).

Next, the effect of the balancing device configured as described above will be described. In the washing stroke, the rotating tub 30 receives the rotational force of the motor and rotates forward and backward. The laundry inside the rotating tub 30 is rolled up by the rotation of the rotating tub 30, or is wash | cleaned by falling | lifted up by the lifter 33a. During the dehydration stroke, the water is centrifuged out of the laundry by the high speed rotation of the rotating tub 30 and drained to the outside by a drainage device not shown. During such washing or dehydration stroke, the rolling element 42 maintains balancing by moving in the direction opposite to the eccentric direction of the laundry. Therefore, almost perfect balancing is achieved and vibration-free and noise-free can be realized. In addition, the weld joints of the combination 45 of the first plate 43 and the second plate 44 forming the races 41a and 41b are not exposed to the inside of the rotary tub by the front plate and the back plate, so that the washing is performed. Contact with water can be prevented to prevent wear and corrosion caused by surface oxidation. In addition, the welded portion may not be exposed to the inside of the rotating tub, thereby providing a beautiful appearance of the inner surface of the rotating tub.

Claims (3)

A drum-shaped fixing tub suspended in the main body case, a rotating tub rotatably installed in the fixing tub, a groove-shaped lace provided concentrically with the rotating tub on the front and rear plates of the rotating tub, and inserted into the race as a moving material. A plurality of rolling elements, a first plate and a second plate overlapped to form the race, and a combination of the first plate and the second plate is disposed on the outer surface of the front plate and the back plate, respectively. The balancing device of the drum washing machine, characterized in that the coupling portion of the first plate and the second plate is coupled so as not to be exposed to the inside of the rotary bath. The balancing device of claim 1, wherein an inward groove is formed in the front plate and the rear plate, and a race portion of the combination of the first plate and the second plate is inserted into the inward groove. 3. The balancing device as claimed in claim 2, wherein the plate assembly, the front plate, and the rear plate are bolted to the outside of the rotary tub.