KR0136037Y1 - A balancer of a drum type washing machine - Google Patents

Abstract

The object of the present invention is to insert a stainless steel for guiding rolling motion of rolling elements inside the race to guide rolling movement, maximizing rolling motion of rolling elements and making it easy to process races such as plastic. By making it possible to make it easy to manufacture.

The balancing device of the drum washing machine according to the present invention, the drum-shaped fixing tank 20 suspended in the main body case 10, the rotating tank 30, rotatably installed in the fixing tank 20, the rotating tank 30 Non-metallic races 41a and 41b concentrically provided with the rotary tub 30, and a plurality of rolling elements 42 and races 41a and 41b inserted into the races 41a and 41b as moving materials. It is provided inside the metal guide member 43 for guiding the rolling motion of the rolling element 42.

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 detailed view of the main portion 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: guide member

The present invention relates to a drum washing machine, and more particularly, to a balancing device for a drum washing machine that installs races at both ends of a rotary tub and provides a plurality of steel balls as rolling elements to perform balancing during washing and dehydration.

The drum washing machine is a device for performing washing by a drop caused by the rotation of a drum having a drum shape, and washing, rinsing, and dehydration are automatically performed according to a pre-programmed program. During the dehydration operation of the drum washing machine, a balancing device is essential in 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 suspension spring (4), and by the lower shock absorber (5). Supported. The rotating tub 2 is driven by a motor 6 installed at the bottom of the case 1, and a rotating shaft (not shown) is provided at the rear of the rotating tub 2 to transmit the rotational force of the motor 6 to the rotating tub 2. And pulleys (not shown) are 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 fixed bath 3 and the rotating tank 2 to flow, and guide the water centrifuged from the laundry in the rotating tank 2 to the fixed tank 3 during dewatering. The lifter 8 functions to lift and drop the laundry.

In addition, counterweights 9a and 9b are mounted on the fixing tank 3 to prevent vibration generated during washing and dehydration. The counterweights 9a and 9b are composed of a front balance weight 9a attached to the front surface of the fixing tank 3 and an upper balance weight 9b attached to the upper side of the fixing tank 3, respectively, 11.4 kg and 12.2. It has a weight of about kg. The material of these counterweights 9a and 9b 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 the installation work is difficult, and as a whole, the weight of the product is increased, which makes it difficult to handle in the distribution process. Second, during the washing or dehydration process, the amount of eccentricity of the laundry and the vibration thereof are directly transmitted to the fixing tank, and the balancing effect is lowered because the amount of the eccentricity and the vibration are simply suppressed or attenuated by the weight of the counterweight. Third, because the balance weight is bolted to the fixing tank, the coupling state of the balance weight is loosened due to corrosion or fatigue of the fastening portion generated by using for a long time, noise is generated, 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 insert a stainless steel for guiding rolling motion of rolling elements in the race for guiding the movement of rolling elements to maximize rolling motion of rolling elements and at the same time to make races such as plastics easy It is to provide a balancing device for a drum washing machine that can be easily manufactured by being made of a material.

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, a non-metal provided concentrically with the rotating tank in the rotating tank It comprises a race of material, a plurality of rolling elements inserted into the race as a moving material, a guide member of a metallic material provided inside the race to guide the rolling motion of the rolling elements.

Hereinafter, with reference to the accompanying drawings will be described in detail 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 the suspension of the fixing tank 20. The upper end of each suspension gas spring 11 is caught by the ceiling of the case and the lower end is coupled to the outer circumferential surface of the fixing tank 20. In addition, the shock absorber 12 is installed below the fixing tank 20.

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 cylindrical 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 are provided on the front plate 31 and the rear plate 32 to solve the imbalance caused by the eccentricity of the laundry during washing or dehydration. The balancing means 40 is a race 41a shaped like a groove 43a formed concentrically with the rotating tub 30 in the front plate 31 and the rear plate 32 of the rotating tub 30 ( 41B) (RACE) and a plurality of rolling elements 42 inserted into the race 41a and 41b as moving materials. Two races 41a and 41b are provided on the inner side and the outer side, the inner races 41a and 41b protrude inwardly into the rotating tub 30, and the outer races 41a and 41b protrude outwards. . Between each race 41a and 41b is sealed by welding, and oil is filled in the race 41a and 41b. As the rolling element 42, a ball-shaped steel ball is used. Instead of metal balls, rollers may be used, or they may be made of plastic.

Referring to FIG. 3, the races 41a and 41b are made of plastic to facilitate manufacture, and the rolling motions of the rolling elements 42 are smoothly formed inside the races 41a and 41b. Guide members 43 are provided to prevent wear of the races 41a and 41b by friction with the rolling elements 42. Guide member 43 is installed in the inner and outer sides of the race (41a) (41b) in a band shape is installed so that both sides of the rolling element 42 abuts, correspondingly extending the ring (41a) (41b) of the ring shape Take The guide member 43 is made of a metal material having good rolling properties and low wear. In this embodiment, stainless steel is used. The guide member 43 is inserted and configured at the time of injection of the races 41a and 41b, thereby making the manufacturing process easy and easy. On the other hand, the race 41a (41b) may be any non-metallic material that is easy to injection, but in this embodiment a conventional plastic material is employed.

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 37 and rotates forward and backward. By the rotation of the rotating tub 30, the laundry inside the rotating tub 30 is rolled up by the lifter 33b, and is wash | cleaned by falling. 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 an unshown drainage device. During such washing or dehydration administration, 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 detail, the laundry is located below the rotary tub 30. In this eccentric state, when the rotating tub 30 rotates at a high speed by the motor 37, the rolling element 42 follows the races 41a and 41b due to the centrifugal force generated by the high-speed rotation of the rotating tub 30. By moving to the opposite side of the eccentricity to compensate for the eccentricity to prevent the vibration and eccentric rotation of the rotating tub (30). That is, the center of rotation of the rotating tub 30 rotates in a state in which it is shifted from its geometric center by the eccentricity of the laundry. The rolling elements 42 accommodated in the races 41a and 41b receive the centrifugal force generated based on the geometric center and the centrifugal force generated based on the rotational center at the same time, thereby moving them in the opposite direction of the eccentricity by the force of the forces. . The rolling element moved in this manner rotates with respect to the geometric center of the rotating tank to match the center of rotation of the rotating tank with the geometric center. As a result, the eccentricity of the rotating tub is eliminated so that the vibration is eliminated and the noise is lost.

In addition, the rolling element moves smoothly in contact with the guide member of the metal material installed inside the race, so the movement is smooth, and prevents the wear of the race made of plastic. By constructing the lace from plastic, it is easy and easy to manufacture the lace.

In particular, since the guide member made of metal is formed in a ring shape on the side of the race where the centrifugal force by the rolling element acts as a balancing force, the deformation of the race is reduced by the centrifugal force. The effect can be further increased.

Claims (3)

A drum-shaped fixing tub 20 suspended in the main body case 10, a rotating tub 30 rotatably installed in the fixing tub, and non-metallic races 41a and 41b provided concentrically with the rotating tub in the rotating tub. ), A drum washing machine comprising a plurality of rolling elements 42 inserted into the race as a moving material, and a guide member 43 made of metal provided in the race to guide rolling motion of the rolling elements. Balancing device. The balancing device as set forth in claim 1, wherein the guide member is provided on the inside and the outside of the race such that the rolling element moves in contact with the rolling element at all times. The balancing device of a drum washing machine according to claim 1, wherein the race is made of a plastic material.