KR20100057114A - Drum type washing machine - Google Patents

Abstract

PURPOSE: A drum type washing machine is provided to enhance washing degree by washing the laundry while falling it by forming a plurality of lifters along the circumferential direction of the inside of the drum. CONSTITUTION: A drum type washing machine is composed of a housing, lifters(20), a drum wrapper, a drum back(17), and a flange shaft(30). The lifters lift and fall the laundry. The drum wrapper is formed in a cylindrical form. The drum back is installed at the back side of the drum wrapper. The flange shaft is installed at the back side of the drum back. The drum assembly is composed of lifters, a drum back and a flange shaft. The drum assembly is integrally molded.

Description

Drum Washing Machine {Drum Type Washing Machine}

The present invention relates to a drum washing machine, and more particularly to a drum washing machine in which the lifter, the drum bag and the flange shaft are integrally injection molded.

In general, a drum washing machine includes a housing forming an exterior, a cylindrical tub installed inside the housing and containing wash water, a cylindrical drum rotatably installed inside the water tank to wash laundry, and a tub of the tub. It is provided with a drive motor disposed in the rear portion to rotate the drum, and the door is provided in the front of the housing.

The drum consists of a drum front having an opening toward the door, a drum wrapper formed in a cylindrical shape, and a drum bag installed on a rear surface of the drum wrapper and rotatably installed in the tub. The side of the drum wrapper is provided with a number of small holes for entering and exiting the wash water.

A triangular flange shaft is fastened to the rear of the drum bag, and a rotating shaft is fixed to the flange shaft through the tub to the rear of the housing, and a driving force is transmitted by a belt connecting the rotating shaft and the driving motor.

In the drum, a plurality of lifters formed by protruding a predetermined length from the inner circumferential surface of the drum are arranged in the circumferential direction, and when the drum is rotated, the laundry and the washing water are lifted upwards by the lifters, so that the laundry is washed. .

In addition, the front of the tub and the drum is provided with an opening to open the door to the laundry through the opening can be put or taken out to the drum, the door and the drum is closed from the outside to wash the laundry.

Looking at the manufacturing process of such drums, lifters, flange shafts and rotary shafts,

The drum is machined from the mold to the drum front, drum wrapper and drum back, and then seaming the drum front and drum wrapper and seaming the drum wrapper and drum back. Seaming joining refers to a process of bending an end portion of two sheets of material and pressing them together. In the case of the flange shaft, the rotary shaft is inserted into the mold of the flange shaft and insert injection is performed to form an assembly of the flange shaft and the rotary shaft. Thereafter, the assembly of the flange shaft and the rotating shaft is fixed to the drum bag using screws, and the lifter is also fixed to the drum wrapper using screws.

The drum washing machine has a problem that the rotation axis of the drum and the drum may not coincide with each other because the drum bag and the flange shaft are fastened by a fixing means such as a screw.

In addition, the flange shaft is mainly used as a die of aluminum die casting, which is difficult to process and requires post-processing after molding, there is a problem that the overall productivity is low and the material cost is expensive.

One aspect of the present invention is to disclose a drum washing machine that does not require post-processing of the flange shaft, improves overall productivity and reduces material costs. It also discloses a drum washing machine in which the rotational center of the drum and the rotational axis coincide.

The drum washing machine according to the spirit of the present invention includes a housing, a lifter for lifting and dropping laundry, a drum wrapper formed in a cylindrical shape, a drum bag installed at the rear of the drum wrapper, and a flange shaft installed at the rear of the drum bag. However, the lifter, the drum bag and the flange shaft constitute a drum assembly, and the drum assembly is integrally injection molded.

In addition, the drum assembly may be formed of the same material.

In addition, the drum assembly may be formed of a mixture of polybutylene terephthalate (PBT) resin, polyethylene terephtalate (PET) resin and glass fiber.

In addition, the proportion of glass fibers in the mixture may be 30 percent to 50 percent.

In addition, the drum wrapper, the outer portion of the drum bag circumferential surface is formed with a flange portion, the inner portion of the drum bag circumferential surface is formed a lancing processing portion, the drum assembly and the drum wrapper may be coupled.

Drum washing machine according to an embodiment of the present invention described above by injection molding integrally the lifter, drum bag and the flange shaft, it is possible to make the installation position of the rotating shaft coincides with the rotation center of the drum.

In addition, the raw materials of the lifter, the flange shaft and the drum bag have the following effects by using a mixture of polybutylene terephthalate (PBT) resin, polyethylene terephtalate (PET) resin and glass fiber.

That is, the physical properties such as impact strength and heat resistance of the aluminum die casting used as the material of the existing flange shaft are retained, and the physical properties such as weather resistance, friction resistance, abrasion resistance, dimensional stability, and heat resistance characteristics are more excellent. It is possible to be economically advantageous, and since the use of thermoplastic material can be recycled from defective or discarded products, thereby making it environmentally friendly.

In addition, unlike aluminum die casting, the time required for the injection process is only 40 seconds to 60 seconds to increase productivity, and the water absorption rate of the material is low, so that the lowering of physical properties during long-term use also increases the reliability of parts.

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

1 is a side cross-sectional view showing the structure of a drum washing machine according to an embodiment of the present invention, Figure 2 is a view showing the internal structure of Figure 1, Figure 3 is a coupling diagram of each component of Figure 2, Figure 4A is a detailed sectional view of the portion “A” of FIG. 3, and FIG. 4B is a detailed sectional view of the portion “B” of FIG. 3.

As shown in FIG. 1, the drum washing machine according to an embodiment of the present invention includes a housing 1, a door 2 coupled to the front of the housing, and an opening 12 at the front thereof toward the door 2. A cylindrical drum (11) formed with a plurality of lifters (20) disposed on an inner circumferential surface of the drum (11), a tub (7) having the same shape as the drum (11) and surrounding the drum (11); And a motor 5 fixed to the lower portion of the tub 7 to transmit rotational force to the drum 11.

The upper part of the tub 7 is supported by a plurality of springs 3, one end of which is fastened to the inner upper part of the housing 1 and the other end of which is fastened to the upper part of the tub 7, and the lower part of the tub 7 is The housing 1 is fixed to the inner lower part and the other end has a dustproof structure supported by the damper 4 fixed to the outer bottom of the tub 7. In addition, the upper portion of the tub (7) is connected to the water supply pipe (8) for supplying the wash water and the drain pipe (9) for discharging the wash water to the lower portion of the tub (7). The water supply pipe 8 communicates with the detergent container 10 provided in the upper part of the housing 1 to supply the washing water in which the detergent is dissolved.

The drum 11 includes a drum front 13 having an opening 12 toward the door 2, a drum wrapper 14 formed in a cylindrical shape, and a drum bag 17 installed on a rear surface of the drum wrapper 14. It consists of and is rotatably installed in the tub (7). The drum wrapper 14 is provided with a plurality of small holes 15 for entering and exiting the wash water.

The triangular flange shaft 30 is fastened to the rear of the drum bag 17, and the rotary shaft 18 is fixed to the flange shaft 30 toward the rear of the housing 1 through the tub 7. The driving force is transmitted by the belt 6 connecting the 18 and the driving motor 5.

On the inner circumferential surface of the drum 11, a plurality of lifters 20 are arranged along the circumferential direction at regular intervals, and as the drum 11 rotates, the laundry is pulled upwards along with the washing water and then dropped at a predetermined height to wash the laundry. Be sure to

Hereinafter, the manufacturing process of the drum 11, the lifter 20, the flange shaft 30 and the rotating shaft 18 according to an embodiment of the present invention.

Drum assembly made of a mixture of polybutylene terephthalate (PBT) resin, polyethylene terephtalate (PET) resin and 50% glass fiber in a mold in which the lifter 20, the drum bag 17, and the flange shaft 30 are integrally formed. Injection molding 160. At this time, the rotating shaft 18 is inserted into the mold and insert-molded.

Polybutylene Terephthalate (PBT) resin used as the material of the drum assembly 160 is an engineering plastic having a low water absorption rate and excellent mechanical properties such as dimensional stability, flame retardancy, electrical insulation, and abrasion resistance, and include 1,4-butanediol and terephthalic acid ( TPA) or dimethyl terephthalate (DMT) as the main raw material. The polybutylene terephthalate (PBT) resin can be used as a substitute for a metal such as zinc or aluminum in consideration of various excellent properties and costs, and can also be used as a substitute for engineering plastics such as polyacetal, nylon, and polycarbonate.

Polyethylene terephtalate (PET) resin used as the material of the drum assembly 160 has excellent properties such as strength, heat resistance, weather resistance, and chemical resistance, and is synthesized from dimethyl terephthalate (DMT) and ethylene glycol. It is an environmentally friendly material that is harmless to the body, lightweight and easy to recycle. In particular, the moisture absorption rate is small, and even if it is in contact with moisture for a long time, there is a characteristic that the width of the physical property decreases.

Glass fiber (Glass Fiber) used as the material of the drum assembly 160 is a mineral fiber made of fused glass as a fiber, and does not corrode because it is resistant to high temperature, has no absorbency, has low hygroscopicity, and has chemical durability. It is characterized by high tensile strength, low elongation, and high electrical insulation. The content of the glass fiber of 50% is an embodiment for maintaining the strength of the injection molded product, and the content thereof is preferably about 30% to 50%.

In addition, the assembly of the manufactured drum assembly 160 and the rotating shaft 18 is combined with the drum wrapper 14. Referring to FIG. 4A, an assembly of the drum assembly 160 and the rotating shaft 18 is inserted into a predetermined portion in the axial direction of the drum wrapper 14, and a drum wrapper on the outer circumferential surface of the drum bag 17 in the inserted state. The portion 14 is bent toward the center of the drum 11 so that a flange portion 42 is formed, and the portion of the drum wrapper 14 circumferential surface inner side drum wrapper 14 is bent in an arrowhead shape toward the center of the drum 11. The lancing processing part 45 is formed. By forming the flange portion 42 and the lancing processing portion 45, the assembly of the drum assembly 160 and the rotating shaft 18 is fixed to the drum wrapper 14. The lifter 20 is then screwed into the drum wrapper 14.

In addition, the drum front 13 and the drum wrapper 14 are also combined. Referring to FIG. 4B, the drum front 13 and drum wrapper 14 are joined by seaming bonding. That is, seaming junctions 47 are formed by bending and overlapping end portions of the drum front 13 and the drum wrapper 14 plate.

By the above process, the assembly of the drum 11, the lifter 20, the flange shaft 30 and the rotating shaft 18 is manufactured, and the drum washing machine is completed by combining it with the rest of the washing machine.

Hereinafter, a process of washing laundry according to a preferred embodiment according to the present invention.

When the driving of the motor 5 is performed while the washing water is filled in the tub 7 and the laundry is filled in the drum 11, the drum 11 rotated by the motor 5 is reversed in the forward and reverse directions. Wash the laundry while rotating repeatedly.

At this time, the laundry inside the drum 11 is lifted by the lifter 20 provided on the inner surface of the drum 11 and is washed by the free fall by repeating the operation of free falling. The rinsing of the laundry is the same except for the addition of detergent.

In the above, the present invention has been illustrated and described with respect to certain preferred embodiments. However, the present invention is not limited only to the above-described embodiments, and those skilled in the art to which the present invention pertains can variously change without departing from the gist of the technical idea of the present invention described in the claims below. Could be done.

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

FIG. 2 is a diagram illustrating an internal structure of FIG. 1.

3 is a combined view of each component of FIG.

4A is a detailed cross-sectional view of the portion “A” of FIG. 3.

4B is a detailed cross-sectional view of the portion “B” of FIG. 3.

Description of the Related Art [0002]

1 housing 11 rotating tank

13: drum front 14: drum rapper

17: drum bag 18: axis of rotation

20: lifter 30: flange shaft

42: flange portion 45: lancing processing portion

47: seaming joint 160: drum assembly

Claims (5)

A housing, a lifter for lifting and dropping laundry, a drum wrapper formed in a cylindrical shape, a drum bag installed at a rear side of the drum wrapper, and a flange shaft installed at a rear side of the drum bag, Said lifter, drum bag and flange shaft constitute a drum assembly, said drum assembly being integrally injection molded. The method of claim 1, And the drum assembly is formed of the same material. The method of claim 1, The drum assembly is a drum washing machine, characterized in that formed of a mixture of PBT (Polybutylene Terephthalate) resin, PET (Polyethylene Terephtalate) resin and glass fiber. The method of claim 3, A drum washing machine, characterized in that the proportion of the glass fibers in the mixture is 30 to 50 percent. The method of claim 1, The drum wrapper, the outer side of the drum bag circumferential surface is formed with a flange portion, the inner side of the drum bag circumferential surface is formed a lancing processing portion, drum washing machine, characterized in that the drum assembly and the drum wrapper is coupled.

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