KR0182723B1 - Method for manufacturing a balancing device of a washing machine - Google Patents

Abstract

The present invention relates to a method for manufacturing a balancing device of a washing machine, the object of which is to effectively form and seal the flow path for injecting oil in manufacturing the steel ball balancing device.

According to the present invention, the plate-like members 31 and 32 and the housing 36 having the same grooves forming the oil injection passages 37c extending from the races 41a and 41b and the races 41a and 41b when combined with each other. Prepare. And after inserting a plurality of steel balls between the grooves to combine the plate member (31) 32 and the housing (36). Thereafter, after the oil is injected into the races 41a and 41b through the oil injection passage 37c, the oil injection passage 37c is sealed.

Description

Manufacturing method of balancing device of washing machine

The present invention relates to a method for manufacturing a balancing device for a washing machine, and more particularly, to a method for manufacturing a balancing device for performing balancing during washing and dehydration with steel balls introduced with oil into the races 41a and 41b provided at both ends of a rotating tub. It is about.

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 washing or dehydrating administration 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), the upper side is suspended by a suspension gas spring (not shown), and the lower side is a shock absorber (not shown). Installed while being supported. 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 pass the fixed bath (3) and the rotating tank (2) during washing, and during dehydration, the water centrifuged from the laundry in the rotating tank (2) to the holding tank (3). Guide them off. The lifter 8 lifts and falls the laundry to function to knock the laundry.

In addition, the counterweight (9) is mounted to the fixing tank (3) to prevent vibration occurring during washing and dehydration. This counterweight consists of a front balance weight (9) attached to the front of the fixing tank (3) and an upper balance weight (not shown) attached to the upper side of the fixing tank (3), each weighing about 11.4kg and 12.2kg Have The material of this counterweight is cast iron, and is attached to the fixing tank 3 using the bolt 9a 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, 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, since the balancing weight is bolted to the fixing tank, the coupling state of the balance weight is loosened due to corrosion or fatigue phenomenon of the fastening part generated by using for a long time.

Therefore, the present invention is to solve the above problems, an object of the present invention is to arrange a plurality of rolling elements in the rotating tub and to configure these rolling elements to move freely in the opposite direction of the eccentric direction of the laundry generated during washing or dehydration process It is to provide a balancing device manufacturing method of the washing machine that can effectively suppress the occurrence of vibration and noise by effectively maintaining the balance in response to the eccentric amount of the laundry.

Another object of the present invention is the race 41a (41b) of the inlet 37d for injecting oil for guiding the rolling elements to move freely to move in a direction opposite to the eccentric direction of the laundry plural rolling elements arranged in the rotary tub It is to provide a balancing device manufacturing method of the washing machine that can be effectively sealed without deformation.

1 is a view showing the structure of a conventional drum washing machine.

Figure 2 is a cross-sectional view of a drum washing machine showing the internal configuration of the drum washing machine to which the present invention is applied.

3 is a detailed view of main parts of the present invention.

4 is a left side view of FIG.

Figure 5 is a flow chart showing a manufacturing process of the balancing device according to the present invention.

6 is a view showing a welding method of the plate member and the housing 36 according to the present invention.

* Explanation of symbols for main parts of the drawings

30: rotating tank 36: housing

41a, 41b: race 42: rolling element

Method for manufacturing a balancing device of the washing machine according to the present invention for achieving the above object, the step of preparing a plate-like member and the housing for forming the oil injection passage extending from the race and the race, when coupled to each other, a plurality of front And a coupling step of coupling the plate member and the housing after inserting the fuselage, injecting oil into the race through the oil injection path, and closing the oil injection path.

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

Referring to FIG. 2, the drum-shaped fixing tank 20 is suspended by the suspension gas spring 11 and the shock absorber 12 inside the main body case 10. That is, the upper end of the suspension gas spring 11 is caught on the ceiling of the case 10, the lower end is coupled to the upper outer peripheral surface of the fixing tank 20, the shock absorber 12 is the lower side of the fixing tank 20 and the main body case (10) It is coupled to the bottom (10a) of the suspension to suspend the fixing tank (20).

The rotating tub 30 is rotatably installed inside the fixed tub 20. The rotating tub 30 includes two plate members 31 and 32 and a cylindrical side plate 33 connecting them. The plate members 31 and 32 include a front plate 31 and a rear plate 32. 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. A pulley 35 is provided at an end of the rotation shaft 34, and a belt 14 is engaged between the pulley 35 and the motor 13 to transmit the rotational force of the motor 13 to the rotation shaft 34. A balancing device 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.

This balancing device will be described with reference to FIG. 2, FIG. 3, and FIG. Grooves 41a, 41b (RACE) 41a, 41b formed in the front plate 31 and the back plate 32 of the rotating tub 30 concentrically with the rotating tub 30. A plurality of rolling elements 42 inserted into the moving materials in 41a and 41b are included. Oil is filled in the races 41a and 41b, and ball-shaped steel balls are used as the rolling elements 42.

Filled with oil, two races 41a and 41b are provided inside and outside, and races 41a, 41b, 41a, and 42a are plate members 31, 32 and plate members 31, 32. It is formed for the housing 36 is coupled to the inner side of. That is, grooves 37a which are opened inwardly are formed in the outer surfaces of the plate members 31 and 32, and grooves 37b which are opened outwardly are formed in the housing 36 opposite to the plate members 31 and 32. ) And the races 36 form the races 41a and 41b. The race 41a and 41b are formed with an oil injection passage 37c for injecting oil, and the oil injection passage 37c extends inward from the race 41a and 41b and has an injection hole 37d at the end. ) Is formed. At this time, the oil injection passage 37c is formed in the plate members 31 and 32, and extends in the direction perpendicular to the races 41a and 41b.

Subsequently, a manufacturing method of the balancing device configured as described above will be described in detail with reference to the flowchart shown in FIG.

First, the rotating tub 30 is manufactured by coupling the front plate 31 and the rear plate 32 on which the balancing device is installed through the side plate 33.

The balancing device is installed symmetrically on the front plate 31 and the back plate 32, the front plate 31 and the back plate 32 are collectively referred to as plate-like members (31) (32). First, the preparation step 101 is performed. In this step, the plate members 31 and 32 and the plate member having the groove 37a and the oil injection passage 37c extending downward from the groove 37a on the inner side thereof ( It is a step of preparing a housing 36 having a groove 37b facing the grooves 37a of 31 and 32. At this time, the oil injection passage 37c is provided in a groove shape opened in the same direction as the groove 37a, and the grooves 37a and 37b and the oil injection passage 37c are formed.

And the coupling step 102 is to combine the housing 36 and the plate member (31, 32), before inserting a plurality of rolling elements (42) in the grooves (37a) 37b before joining the race ( The housing 36 and the plate members 31 and 32 are joined by welding both sides of the 41a and 41b. In this case, as shown in FIG. 6, the welding jig is placed on the upper side of the fixed welding jig 51 by the plate members 31 and 32 and the housing 36, and then the welding jig is movable to the upper side thereof. 52 is rotated along the races 41a and 41b to engage the plate members 31 and 32 and the housing 36. At this time, a groove 51a into which the oil injection channel 37c is inserted is formed in the fixed welding jig 51 opposite to the oil injection channel 37c to prevent the oil injection channel 37c from being deformed during welding.

Next, an oil injection step 103 is performed. In this step, the oil injected into the oil injection hole 37d is injected into the races 41a and 41b through the oil injection path 37c.

Finally, the sealing step 104 is performed to prevent the oil injected into the races 41a and 41b from leaking. In this sealing method, the oil injection passage 37c protruded is sealed by using a spot welding machine or the oil injection passage 37c is separated from the groove 51a formed in the fixed welding jig 51, and then welded to fix it. Is used. Reference numeral 0b360c denotes a welded portion.

The operation of the balancing device of the drum washing machine configured as described above is as follows.

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 33b. 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.

As described in detail above, the balancing device of the washing machine according to the present invention is almost completely balanced by a balancing device is installed directly on the rotating tub to achieve a vibration-free, noise-free. It is also possible to seal the oil filling channel without deforming the race.

Claims (3)

Preparing the plate members 31 and 32 and the housing 36 for forming the oil injection passages 37c extending from the races 41a and 41b and the races 41a and 41b when coupled to each other, A coupling step of coupling the plate-shaped members 31 and 32 to the housing 36 after inserting a plurality of electric shocks 42 into the races 41a and 41b; Injecting oil into the races 41a and 41b through the oil injection passage 37c, Method for manufacturing a balancing device of the washing machine comprising the step of sealing the oil injection passage (37c). The method of claim 1, The coupling step is a method for manufacturing a balancing device of a washing machine, characterized in that the two sides of the race (41a) (41b) by welding to join the plate-like member (31) (32) and the housing (36). The method of claim 2, Balancing of the washing machine characterized in that the welding portion 60 is supported by the jig 51 having the groove 51a into which the oil injection passage 37c is inserted when welding the oil injection passage 37c. Device manufacturing method.