WO2023219470A1

WO2023219470A1 - Method for manufacturing drum and clothing treatment apparatus comprising drum

Info

Publication number: WO2023219470A1
Application number: PCT/KR2023/006502
Authority: WO
Inventors: 김성용; 김명덕; 문재철; 장상인
Original assignee: 엘지전자 주식회사
Priority date: 2022-05-12
Filing date: 2023-05-12
Publication date: 2023-11-16
Also published as: CN119183485A

Abstract

The present invention relates to a method for manufacturing a drum in which a front part of the drum, which is coupled to the front of the drum and forms an inlet, is manufactured by producing a cylindrical metal plate and then expanding same, and a clothing treatment apparatus comprising the drum.

Description

Manufacturing method of drum and clothing processing device including the drum

The present invention relates to a method of manufacturing a drum that accommodates clothing and a clothing processing device including the drum.

In general, drums that accommodate clothes are provided in a cylindrical shape and are applied to clothes processing devices such as washing machines that wash clothes with water and detergent and dryers that remove moisture from clothes.

The drum is provided to rotate in the clothing treatment device to evenly transmit physical force to the entire clothing or to evenly supply hot air to the entire clothing. The drum has durability above a certain level and may be made of a metal material to maintain its shape even when rotating at high speed.

Figure 1 shows a drum used in a conventional clothing processing device.

The drum includes a cylindrical drum body 1 that provides a space for accommodating clothing.

The drum may further include a drum front portion 2 provided to rotatably support the front of the drum body 1 so that the drum body 1 can be rotated about the same axis as much as possible.

The drum front portion 2 may be coupled to the front of the drum body 1 to support the load of the drum body 1. The drum front portion 2 may be provided in a ring shape to form an inlet through which clothing is input into the drum body 1, and may be provided with a smaller diameter than the drum body 1.

Accordingly, the conventional clothing processing apparatus can induce the drum body 1 to rotate while maintaining the same axis by rotatably supporting or fixing the drum front portion 2.

Figure 2 shows a conventional manufacturing method for manufacturing the drum front portion 2.

The drum front portion (2) has a smaller diameter than the drum body (1) and may be manufactured separately from the drum body (1) because it may require greater rigidity than the drum body (1).

Referring to Figure 2(a), the drum front portion 2 can be manufactured using a metal plate M.

The metal plate (M) may be provided as a metal sheet wound with a thin plate.

Conventionally, an area including the area of the drum front portion 2 was cut from the metal sheet. The cut metal plate (M) may be provided in a rectangular or square polygon, and its minimum width may be set to be larger than the diameter of the outer peripheral surface of the drum front portion (2).

Referring to Figure 2 (b), in order to form a ring-shaped material member (D) corresponding to the drum front portion (2) in the cut metal plate (M1), the inner region (I) of the material member (D) is ) and the external area (E) are removed.

This is done by cutting or scraping at least part of the outer and inner peripheral surfaces of the material member (D) from the cut metal plate (M1) and then press forming the outer and inner peripheral surfaces with a press machine to form the material member (D). can be separated from the cut metal plate (M1).

Referring to Figure 2(c), the inner circumference close to the inner circumferential surface of the material member D is protruded to form a support for the drum front portion 2. This can be done using a drawing method or a spinning method in which the inner peripheral surface of the material member D is pressed with a roller or the like to protrude the support.

Referring to Figure 2(d), a separation process is performed to secure the area of the inlet by separating a portion of the inner peripheral surface of the material member (D) from the material member (D). The separation process may utilize forming or piercing methods.

Referring to Figure 2(e), the outer peripheral surface of the material member (D) is folded to form a coupling portion that can be seated and coupled to the outer peripheral surface of the drum body (1), and the inner peripheral surface of the material member (D) is folded to form a thick and A curling method can be performed to form a ring-shaped protective portion with a non-sharp surface.

At this time, a reinforced bent portion that enhances rigidity can be further formed by pressing between the inner and outer peripheral surfaces of the material member (D). This process can utilize burring or trimming methods.

As a result, the material member D is formed as the drum front portion 2 and can be welded to the drum body 1 in the future or coupled to the drum body 1 through a separate fastening member.

This conventional manufacturing method of the drum or drum front portion (2) had the problem of not being able to utilize most of the cut metal plate (M). In other words, in order to secure the ring-shaped material member (D) from the cut metal plate (M1), there is a limit to cutting the inner region (I) and outer region (E) of a larger area than the material member (D). there was. As a result, waste occurred as the material utilization rate of the metal plate (M) fell below 40%, which became the biggest factor in increasing the material cost for manufacturing the drum.

Figure 3 is a conceptual diagram showing the process of manufacturing the drum front part in a conventional drum.

In the conventional drum manufacturing method, in order to form a protruding support forming an inlet from the material member (D), the inner peripheral surface of the material member (D) is formed by a method such as drawing or spinning. That is, a support that is small in diameter and protrudes outward from the drum is manufactured by plastically deforming the material member (D).

Referring to Figure 3 (a), the material member (D) of the front part of the conventional drum may be arranged in a ring shape that shields a portion of the front part of the drum body (2). The material member (D) is a thin metal plate and can be prepared in a donut shape. The material member (D) may be prepared as a ring-shaped plate disposed in the radial direction of the drum body (210).

In addition, the material member (D) can be divided into an inner part (B) that forms a support based on its diameter, and an outer part (A) that forms a coupling part. The diameter of the outer portion (A) of the material member (D) may be set to be equal to or slightly larger than the diameter of the drum body (2).

As the inner portion (B) is pushed forward from the material member (D) by a roller or the like, the support is formed.

In this process, it is difficult to mold the entire inner portion (B) physically to be completely identical, and the original properties of the material member (D) are plastically deformed.

As a result, the conventional clothing treatment apparatus had a problem in that the rigidity of the entire support was not uniform, so stress was concentrated in a specific part of the support due to external force, and durability was not guaranteed.

In addition, there was a problem in that the reliability of the drum front portion 2 could not be guaranteed because the morphological characteristics such as surface texture and curvature of the entire support were not secured uniformly.

Furthermore, since the diameter of the material member (D) must be secured to be as large as the diameter of the drum body (1), a metal plate (M) whose width is larger than the diameter of the drum body (2) must be provided, thereby increasing material costs. There was a problem that more metal plates (M) were wasted.

Moreover, the outer portion (A) of the drum front portion (2) coupled to the drum body (1) is not plastically deformed in the metal plate (M). Therefore, the outer portion (A) cannot secure more rigidity than the inner portion (B), and the conventional laundry treatment device uses the coupling force between the drum front portion (2) and the drum body (1) or the drum front portion (2). There was a problem that durability could not be guaranteed.

As a result, the conventional clothing processing device rotates the drum body (1) at a certain RPM or more in order to prevent excessive load from being applied to the portion where the drum front portion (2) and the drum body (1) are coupled. There was a fundamental limitation in that the rotation direction of the drum body (1) could not be changed.

The present invention aims to solve the problem of providing a drum manufacturing method that can reduce the material cost of the drum front part that forms the front of the drum.

The present invention aims to solve the problem of providing a method of manufacturing a drum that can ensure uniform properties of a support supporting a load at the front of the drum.

The present invention aims to solve the problem of providing a drum manufacturing method for manufacturing a drum front portion coupled to the front of the drum using methods such as welding.

The present invention aims to solve the problem of providing a drum manufacturing method that can ensure the formability of the drum front portion coupled to the front of the drum even when using methods such as welding.

The present invention aims to solve the problem of providing a clothing treatment device including a drum manufactured by the above manufacturing method.

In order to solve the above-mentioned problem, the present invention provides a clothing processing device that is coupled to the front of the drum and is provided with a weld line formed by welding a metal plate to the front of the drum to form an inlet through which the clothing is taken out and inputted. do.

The weld line may be disposed along the thickness direction or the front-to-back direction of the front part of the drum.

The drum front portion forms the inlet and may include a support supported by the support wheel, and a body coupling portion extending from the support to a larger diameter and coupled to the drum body. The weld line may be arranged to extend from the support toward the body joint.

The laundry treatment apparatus of the present invention further includes a support plate disposed rearward of the drum, and a driving part coupled to the support plate to rotate the drum, and the driving part is coupled to the back of the drum to rotate the drum. It can be provided. The support may be provided to transmit the load of the drum to the support wheel.

The rigidity of the weld line provided on the support may be set to be greater than the rigidity of other areas.

The rigidity of the body coupling portion may be set to be greater than the rigidity of the support.

In order to solve the above-described problem, the present invention can have scratches formed in the front-back direction or the thickness direction in the front part of the drum, which is coupled to the front of the drum to form an inlet.

The drum front portion may be prevented from forming scratches in the radial or circumferential direction, or may be provided with more scratches formed in the front-back direction or in the thickness direction than scratches in the radial direction.

The scratches may be formed in the body coupling portion in the front-to-back direction or the thickness direction. The number of scratches provided in the body coupling portion may be greater than the number of scratches provided in the support.

The drum front portion further includes a molded portion bent and extending from the support toward the body coupling portion, and the scratches may be formed in the molded portion in the front-back direction or the thickness direction.

The drum front portion may have more scratches provided in the molding portion than scratches provided in the support.

The drum front portion may be provided with a weld line formed by welding metal plates.

The welding line may be arranged to extend from the support to the body joint.

The present invention has the effect of reducing the material cost of the drum front part that forms the front of the drum.

The present invention has the effect of ensuring uniform properties of the support that supports the load at the front of the drum.

The present invention has the effect of manufacturing a drum front portion coupled to the front of the drum using a method such as welding.

The present invention has the effect of ensuring the formability of the drum front portion coupled to the front of the drum even if a method such as welding is used.

Figure 1 shows a drum of a conventional clothing treatment device.

Figure 2 shows a conventional drum manufacturing method.

Figure 3 is a conceptual diagram showing a conventional drum manufacturing method.

Figure 4 shows the appearance of the laundry treatment device of the present invention.

Figure 5 shows the internal structure of the laundry treatment device of the present invention.

Figure 6 shows the configuration of the laundry treatment apparatus of the present invention.

Figure 7 shows the reducer of the laundry treatment apparatus of the present invention.

Figure 8 shows the internal structure of the reducer.

Figure 9 shows the rear plate and base supporting the reducer.

Figure 10 shows a configuration in which the reducer is coupled to the rear plate.

Figure 11 shows a structure in which the reducer and the motor are combined.

Figure 12 shows a structure in which the rotation axes of the reducer and the motor coincide.

Figure 13 shows the drum configuration of the laundry treatment device of the present invention.

Figure 14 shows the structure supporting the drum.

Figure 15 conceptually illustrates the drum manufacturing method of the laundry treatment device of the present invention.

Figure 16 shows the structure to which the manufacturing method of the drum of the present invention is applied.

Figure 17 shows a drum manufacturing method.

Figure 18 shows a manufacturing method of the drum front part.

Figure 19 shows the process of securing material for the front part of the drum.

Figure 20 shows the welding process at the front of the drum.

Figure 21 shows the structure of forming the front part of the drum.

Figure 22 shows the characteristics of the drum of the present invention manufactured by the above manufacturing method.

Figure 23 shows the welding process of the drum of the present invention.

Figure 24 shows another embodiment of the drum welding process of the present invention.

Figure 25 shows that the particle structure of the drum of the present invention changes during the molding process.

Figure 26 shows how the rigidity of the drum of the present invention becomes stronger.

Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. In this specification, the same or similar reference numbers are assigned to the same or similar components even in different embodiments, and the description is replaced with the first description. As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. Additionally, in describing the embodiments disclosed in this specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed descriptions will be omitted. In addition, it should be noted that the attached drawings are only for easy understanding of the embodiments disclosed in this specification, and should not be construed as limiting the technical idea disclosed in this specification by the attached drawings.

Hereinafter, the clothing processing apparatus of the present invention will be described based on the fact that it is equipped with a dryer that can dry clothes with hot air, steam, etc.

However, this is only an example and does not exclude that the laundry treatment apparatus of the present invention is equipped with a washing machine that washes clothes using water and detergent.

That is, the drum of the laundry treatment apparatus of the present invention, which will be described later, can be applied to dryers and washing machines.

A clothing treatment device according to an embodiment of the present invention may include a cabinet 100 that forms an exterior.

The cabinet 100 may include a front panel 110 forming the front surface of the laundry treatment device, an upper panel 150 forming the upper surface, and a side panel 140 forming the side surface. The side panel 140 may include a left panel 141 forming the left side. The front panel 110 may be provided with an opening 111 provided to communicate with the interior of the cabinet 100 and a door 130 rotatably coupled to the cabinet 100 to open and close the opening 111. there is.

An operation panel 117 may be installed on the front panel 110. The operation panel 117 may be provided with an input unit 118 that receives control commands from the user and a display unit 119 that outputs information such as control commands selectable by the user. The control command may include a drying course or drying option that can perform a series of drying processes. A control panel may be installed inside the cabinet 100 to control the internal configuration to execute the control command input through the input unit 118. The control panel is connected to the components inside the clothing processing device and can control the components to execute input commands.

The input unit 118 includes a power supply request unit that requests power supply to the clothing treatment device, a course input unit that allows the user to select a desired course from a plurality of courses, and an execution request unit that requests the start of the course selected by the user. It may be provided to do so.

The display unit 119 may be provided to include at least one of a display panel capable of outputting text and figures, and a speaker capable of outputting voice signals and sounds.

Meanwhile, the clothing treatment apparatus of the present invention may include a water storage tank 120 provided to separately store moisture generated in the process of drying the clothing. The water storage tank 120 may include a handle that can be pulled out from one side of the front panel 110. The water storage tank 120 may be provided to collect condensate generated during the drying process. Accordingly, the user can withdraw the water storage tank 120 from the cabinet 100, remove the condensate, and then mount it back on the cabinet 100. Accordingly, the laundry treatment apparatus of the present invention can be placed in places where sewers, etc. are not installed.

Meanwhile, the water storage tank 120 may be placed on the upper part of the door 130. As a result, the user can bend his or her waist relatively less when withdrawing the water storage tank 120 from the front panel 110, thereby increasing the user's convenience.

Figure 5 briefly shows the interior of the laundry treatment device of the present invention.

Figure 5A focuses on the drum and the configuration disposed in front of the drum, and Figure 5B focuses on the configuration disposed at the rear of the drum.

The clothing processing apparatus of the present invention includes a drum 200 accommodated inside the cabinet 100 to accommodate clothing, a driving unit that rotates the drum 200, and a heat exchange unit provided to supply hot air to the drum 200. It may include a base 800 provided with 900 and a circulation passage portion 820. The circulation passage portion 820 is provided to communicate with the drum 200. The air discharged from the drum 200 may be supplied to the circulation passage unit 820. Additionally, the air discharged from the circulation passage unit 820 may be supplied back to the drum 200.

The driving unit may include a motor unit 500 that provides power to rotate the drum 200. The driving unit may be provided to be directly connected to the drum 200 to rotate the drum 200.

For example, the driving unit may be provided as a DD (Direct Drive unit) type. As a result, the driving unit can control the rotation direction of the drum 200 or the rotation speed of the drum 200 by directly rotating the drum 200, omitting components such as belts and pulleys.

Of course, it may be provided with a motor disposed lower than the drum 200 and a belt connecting the motor and the outer peripheral surface of the drum.

The fact that the laundry treatment apparatus of the present invention is provided as a DD type is only an example, and it does not exclude that it is provided as a belt/pulley type.

Meanwhile, the motor unit 500 may be provided to rotate at high RPM. For example, the clothes inside the drum 200 may be rotated at a much greater RPM than the RPM at which the clothes can be rotated while attached to the inner wall of the drum 200.

However, if the clothes inside the drum 200 are continuously attached to the inner wall of the drum 200 and rotated, the drying efficiency is reduced because the part attached to the drum inner wall is not exposed to hot air.

If the rotor 520 is rotated at a low RPM to roll or agitate the clothes inside the drum 200 without being attached to the inner wall of the drum 200, the output or torque that the driving unit can generate is not properly utilized. Problems may arise.

Therefore, the driving unit of the laundry treatment apparatus of the present invention may further include a reducer 600 that can increase torque while utilizing the maximum output of the motor unit 500 by reducing the RPM.

Additionally, the driving unit may include a drum rotation shaft 6341 that is connected to the drum 200 and rotates the drum 200.

The drum 200 may be provided in a cylindrical shape to accommodate clothing. In addition, unlike the drum used for washing, there is no need to put water into the drum 200, which is used only for drying, and the liquid water condensed inside the drum 200 is discharged to the outside of the drum 200. There is no need to be. Accordingly, the through hole provided along the circumferential surface of the drum 200 may be omitted. That is, the drum 200 used only for drying may be formed differently from the drum 200 used for washing.

The drum 200 may be provided in an integrated cylindrical shape, but may be manufactured by combining a drum body 210 including a circumferential surface and a drum back surface 220 forming a rear surface.

An inlet 211 through which clothing enters and exits may be provided in front of the drum body 210. A driving unit that rotates the drum may be connected to the rear of the drum rear surface 220. The drum body 210 and the drum back 220 can be coupled by a fastening member such as a bolt, but are not limited to this and can be combined in various ways if the drum body 210 and the drum back 220 are coupled so that they can rotate together. It can be combined using .

The drum body 210 may be provided with a lift 213 that pulls the clothes inside upward so that the clothes stored inside can be mixed as it rotates. When the drum 200 rotates, the clothes stored inside may repeat the process of rising and falling by the lift 213. Clothing stored inside the drum 200 may be evenly contacted with hot air while repeatedly rising and falling. Therefore, drying efficiency is increased and drying time is shortened.

A reinforcing bead 212 may be formed on the circumferential surface of the drum body 210. The reinforcing bead 212 may be provided to be recessed or protrude from the inside/outside along the circumferential surface of the drum 200. A plurality of such reinforcement beads may be provided and may be provided to be spaced apart from each other. The reinforcing beads form a certain pattern and may be provided inside/outside the circumferential surface.

The rigidity of the drum body 210 may be increased by the reinforcing bead 212. Accordingly, even if a large amount of clothing is accommodated in the drum body 210 or a sudden rotational force is transmitted through the driving unit, the drum body 210 can be prevented from being twisted. In addition, when the reinforcing bead 212 is provided, the gap between the clothing and the inner peripheral surface may increase compared to the case where the peripheral surface of the drum body 210 is provided with a flat surface, so the hot air supplied to the drum 200 is further increased. It can effectively flow between clothing and the drum 200. Reinforced beads increase the durability of the drum and increase the drying efficiency of the clothing treatment device.

Typically, in the case of a DD type washing machine, the driving unit is coupled to and fixed to a tub that accommodates the drum 200, and the drum 200 may be coupled to the driving unit and supported on the tub. However, since the laundry treatment apparatus of the present invention is equipped to intensively perform a drying process, a tub fixed to the cabinet 100 to accommodate the drum 200 is omitted.

Accordingly, the laundry treatment apparatus of the present invention may further include a support part 400 provided to fix or support the drum 200 or the driving part inside the cabinet 100.

The support portion 400 may include a front plate 410 disposed in front of the drum 200 and a rear plate 420 disposed in the rear of the drum 200. The front plate 410 and the rear plate 420 may be provided in a plate shape and arranged to face the front and rear of the drum 200. The distance between the front plate 410 and the rear plate 420 may be set to be equal to or longer than the length of the drum 200. The front plate 410 and the rear plate 420 may be fixed and supported to the bottom surface or base 800 of the cabinet 100.

The front plate 410 may be disposed between the front panel forming the front surface of the cabinet and the drum 200. Additionally, the front plate 410 may be provided with an input communication hole 412 that communicates with the input port 211. Since the front plate 410 is provided with an input communication hole 412, clothing can be input or removed from the drum 200 while the front surface of the drum 200 is supported.

The front plate 410 may include a duct connection portion 416 provided below the input communication hole 412. The duct connection part 416 may form the lower side of the front plate 410.

The front plate 410 may include a duct communication hole 417 penetrating the duct connection part 416. The duct communication hole 417 is provided in a hollow shape and can guide air discharged through the inlet 211 of the drum to the lower side of the drum 200. Additionally, the air discharged through the drum 211 can be guided to the circulation passage portion 820 located at the lower part of the drum 200.

A filter unit (not shown) may be installed in the duct communication hole 417 to filter out lint or large-sized foreign substances generated from clothing. The filter unit filters the air discharged from the drum 200 to prevent foreign substances from accumulating inside the clothing treatment device and prevents foreign substances from accumulating and obstructing air circulation.

Since the inlet 211 is disposed at the front, it is preferable that the driving unit is installed on the rear plate 420 rather than on the front plate 410. The driving unit may be provided to be mounted and supported on the rear plate 420. As a result, the driving unit can rotate the drum 200 while its position is stably fixed through the rear plate 420.

At least one of the front plate 410 and the rear plate 420 may rotatably support the drum 200. At least one of the front plate 410 and the rear plate 420 may rotatably accommodate the front or rear end of the drum 200.

For example, the front of the drum 200 may be rotatably supported by the front plate 410, and the rear of the drum 200 may be spaced apart from the rear plate 420. It may be connected to the motor unit 500 mounted on and indirectly supported by the rear plate 420. As a result, the area where the drum 200 is in contact with or rubs against the support part 400 can be minimized and the generation of unnecessary noise or vibration can be prevented.

Of course, the drum 200 may be rotatably supported on both the front plate 410 and the rear plate 420.

One or more support wheels 415 that support the front of the drum 200 may be provided at the lower part of the front plate 410. The support wheel 415 may be rotatably provided on the rear surface of the front plate 410. The support wheel 415 can be rotated while in contact with the lower part of the drum 200.

When the drum 200 is rotated by the driving unit, the drum 200 may be supported by a drum rotation shaft 6341 connected to the rear. When clothing is accommodated inside the drum 200, the load imposed on the drum rotation axis 6341 by the clothing may increase. Therefore, there is a risk that the drum rotation shaft 6341 may be bent by the load.

When the support wheel 415 supports the front lower part of the drum 200, the load on the drum rotation axis 6341 can be reduced. Therefore, the drum rotation shaft 6341 can be prevented from bending and noise generated due to vibration can be prevented.

The support wheels 415 are provided in symmetrical positions with respect to the rotation center of the drum 200 and can support the load of the drum 200. The support wheels 415 are preferably provided on the lower left and right sides of the drum 200 to support the drum 200. However, it is not limited to this, and a greater number of support wheels 415 may be provided depending on the operating environment of the drum 200.

The circulation passage portion 820 provided in the base 800 may form a passage for circulating the air inside the drum 200 and feeding it back into the drum 200.

The circulation passage portion 820 includes an inlet duct 821 through which air discharged from the drum 200 flows, an outlet duct 823 that supplies air to the drum 200, the inlet duct 821 and an outlet duct ( It may include a moving duct 822 connecting 823).

When air is discharged from the front of the drum 200, the moving duct 822 may be located on the front side of the circulation passage portion 820. And the discharge duct 823 may be located on the rear side of the circulation passage portion 820.

The discharge duct 823 may further include a blowing unit 8231 that discharges air to the outside of the circulation passage unit 820. The blower 8231 may be provided on the rear side of the discharge duct 823. The air discharged through the blower 8231 may move to the drum 200.

A duct cover part 830 is coupled to the upper side of the circulation passage part 820, so that the open upper surface of the circulation passage part 820 can be partially shielded. The duct cover part 830 can prevent air from leaking out of the circulation passage part 820. In other words, the duct cover portion 830 may form one side of the flow path through which air circulates.

In addition, the heat exchanger 900 provided on the base 800 is provided inside the circulation passage portion 820 and is provided inside the circulation passage portion 820 and a first heat exchanger 910 to cool the air. It may include a second heat exchanger 920 that heats the air cooled in the first heat exchanger 910.

The first heat exchanger 910 may dehumidify the air discharged from the drum 200, and the second heat exchanger 920 may heat the dehumidified air. The heated air can be supplied back to the drum 200 to dry the clothes contained in the drum 200.

The first heat exchanger 910 and the second heat exchanger 920 may be provided as a heat exchanger through which a refrigerant flows. When provided as a heat exchanger through which a refrigerant flows, the first heat exchanger 910 may be provided as an evaporator, and the second heat exchanger 920 may be provided as a condenser. The refrigerant moving along the first heat exchanger 910 and the second heat exchanger 920 may be provided to exchange heat with the air discharged from the drum 200.

The heat exchange unit 900 may include a circulation passage fan 950 that is installed in the circulation passage portion 820 and generates air flow inside the circulation passage portion 820. In addition, the heat exchange unit 900 may further include a circulation passage fan motor 951 that rotates the circulation passage fan 950. The circulation passage fan 950 can rotate by receiving rotational power from the circulation passage fan motor 951. When the circulation flow fan 950 operates, air dehumidified in the first heat exchanger 910 and heated in the second heat exchanger 920 may be moved to the rear of the drum 200.

The circulation flow fan 950 may be installed in any one of the inlet duct 821, the moving duct 822, and the discharge duct 823. Since the circulation passage fan 950 is provided to rotate, noise may be generated when the circulation passage fan 950 operates. Therefore, it is preferable that the circulation passage fan 950 is disposed behind the circulation passage portion 820.

The circulation flow fan 950 may be installed in the blowing unit 8231. Additionally, the circulation flow fan motor 951 may be located behind the blowing unit 8231. When the circulation passage fan 950 rotates by the circulation passage fan motor 951, the air inside the circulation passage portion 820 is discharged to the outside of the circulation passage portion 820 through the blower 8231. It can be.

It is preferable that the inlet 211 of the drum 200 is placed at a relatively high position so that the user can easily withdraw the clothes located inside the drum 200, so the circulation passage part 820 and the heat exchange part (900) may be preferably disposed at the lower part of the drum (200).

A rear plate 420 may be provided at the rear of the drum 200 to guide the air discharged from the circulation passage portion 820 to the drum 200. The rear plate 420 may be provided to be spaced apart from the drum rear surface 220. The circulation passage unit 820 can receive air inside the drum 200 through the front plate 410 and supply air to the drum 200 through the rear plate 420. The air discharged from the circulation passage portion 820 may be guided to the drum 200 through the rear plate 420.

The base 800 may further include a connector 850 that guides the air discharged from the circulation passage portion 820 to the rear plate 420. The connector 850 can guide the discharged air to spread evenly throughout the rear plate 420.

The connector 850 may be installed in the blowing unit 8231. That is, the connector 850 can guide the air discharged from the blower 8231 to the rear plate 420. Hot air supplied to the rear plate 420 may flow into the inside of the drum 200 through the drum rear surface 220.

The drum 200 of the laundry treatment apparatus of the present invention can be rotated by being directly connected to a driving unit located at the rear of the drum 200, rather than being indirectly rotated by being coupled to a belt, etc. Therefore, unlike the drum of a conventional dryer that is provided in a cylindrical shape with open front and rear ends, the rear of the drum of the laundry treatment device of the present invention is shielded and can be directly coupled to the driving unit.

As previously described, the drum 200 is provided in a cylindrical shape and includes a drum body 210 that accommodates clothing and a drum back 220 that is coupled to the rear of the drum body 210 to form the back of the drum. It can be included.

The drum rear surface 220 is provided to shield the rear of the drum body 210 and can provide a coupling surface that is directly coupled to the driving unit. That is, the drum rear surface 220 may be connected to the driving unit to receive rotational power to rotate the entire drum 200. As a result, the front of the drum body 210 may be formed with an inlet 211 through which clothes are input, and the rear may be shielded by the drum back surface 220.

The drum rear surface 220 may be provided with a bushing unit 300 that connects the driving unit and the drum rear surface 220. The bushing portion 300 may be provided on the drum rear surface 220 to form the rotation center of the drum 200. The bushing portion 300 may be provided integrally with the drum back 220, but may be made of a material with greater rigidity or durability than the drum back 220 in order to be firmly coupled to the rotating shaft that transmits power. there is. The bushing portion 300 may be seated and coupled to the drum rear 220 so as to be coaxial with the rotation center of the drum rear 220.

The drum rear surface 220 may include a peripheral portion 221 coupled to the outer peripheral surface of the drum body 210 and a mounting plate 222 provided inside the peripheral portion 221 and capable of being coupled to the driving unit. You can. The bushing portion 300 may be seated and coupled to the mounting plate 222. The rotating shaft that rotates the drum is coupled to the mounting plate 222 through the bushing portion 300, which has the effect of being more firmly coupled. Additionally, it is possible to prevent deformation of the drum back surface 220 from occurring.

The drum rear surface 220 may include a suction hole 224 that is formed between the peripheral portion 221 and the mounting plate 222 and communicates with the front and rear sides of the drum rear surface 220. Hot air supplied through the circulation passage portion 820 may flow into the drum body 210 through the suction hole 224. The suction hole 224 may be provided as a plurality of holes penetrating the drum rear surface 220 or may be provided as a mesh-type net.

A driving unit that rotates the drum 200 may be located behind the rear plate 420. The driving unit may include a motor unit 500 that generates rotational power and a reducer 600 that reduces the rotational power of the motor unit 500 and transmits it to the drum 200.

A motor unit 500 may be disposed behind the rear plate 420. And the motor unit 500 can be coupled to the rear of the rear plate 420 through the reducer 600.

The reducer 600 may be fixed to the back of the rear plate 420, and the motor unit 500 may be coupled to the back of the reducer 600. That is, the rear plate 420 can provide a support surface on which the reducer 600 or the motor unit 500 is supported. However, the present invention is not limited to this, and the motor unit 500 may be coupled to the rear plate 420.

Figure 6 is an exploded perspective view showing the internal components of the laundry treatment device separated from each other.

A clothing processing device according to an embodiment of the present invention includes a drum 200 for accommodating clothing, a front plate 410 supporting the front surface of the drum, a rear plate 420 located at the rear of the drum, and a bottom of the drum. A base (800) provided to provide a space for the air inside the drum to circulate or moisture contained in the air to condense, a motor unit (510, 520, 540) located at the rear of the drum to provide rotational power to the drum, It may include a reducer 600 that reduces the rotation of the motor unit and transmits it to the drum, and a rear cover 430 that is coupled to the rear plate 420 to prevent the motor unit from being exposed to the outside.

The base 800 may include a circulation passage portion 820 that communicates with the drum 200 and allows air to flow in from the drum or discharge air from the drum.

The front plate 410 may include a front panel 411 forming the front surface, and an input communication hole 412 formed to penetrate the front panel 411 and communicate with the drum 200. The front plate 410 is provided on the back of the front panel 411, and is provided to surround the radial outer side of the input communication hole 412, and includes a front gasket 413 that accommodates a part of the drum body 210. This can be provided.

The front gasket 413 may rotatably support the drum body 210 and may be provided to contact the outer or inner peripheral surface of the inlet 211. The front gasket 413 can prevent hot air inside the drum 200 from leaking between the drum body 210 and the front plate 410. The front gasket 413 may be made of a plastic resin or elastomer, and a separate sealing member is additionally coupled to the front gasket 413 to prevent clothing or hot air from blowing from the drum body 210 to the front plate 410. ) can prevent it from escaping.

Meanwhile, the front plate 410 may include a duct communication hole 417 provided through the inner peripheral surface of the input communication hole 412. In addition, the front plate 410 may include a duct connection part 416 that extends below the duct communication hole 417 and forms a flow path that communicates the drum body 210 and the circulation flow path part 820.

The duct connection part 416 may be in communication with the drum body 210 through the duct communication hole 417, and the air discharged from the drum body 210 is connected to the duct connection part 416 through the duct communication hole 417. It may flow into and be guided to the circulation passage unit 820. Since the air discharged from the drum body 210 is guided to the circulation passage part 820 by the duct connection part 416, there is an effect of preventing the air inside the drum from leaking out.

A filter member (not shown) may be installed in the duct connection part 416 to filter foreign substances or lint from the air discharged from the drum 200 and prevent foreign substances from entering the circulation passage portion 820.

The front plate 410 may be rotatably installed on the back of the front panel 411, and a support wheel 415 may be installed to support the lower part of the drum 200. The support wheel 415 supports the front of the drum 200 and has the effect of preventing the rotation shaft connected to the drum from bending.

The front plate 410 is provided to penetrate the front panel 411 and has a water storage tank support hole 414 through which the water storage tank 120 (see FIG. 1), which stores the condensate generated during the drying process, can be pulled out or supported. It can be provided. When the water storage tank support hole 414 is provided at the upper side, the user does not have to bend his or her waist when withdrawing the water tank, thereby increasing user convenience.

The drum 200 for accommodating clothing may include a drum body 210 at the front of which is provided an inlet 211 through which clothing enters and exits, and a drum rear surface 220 forming a rear surface.

The drum rear surface 220 includes a peripheral portion 221 connected to the drum body 210, a suction hole 224 formed through the drum rear surface 220 on the inside of the peripheral portion 221, and a drum rear surface ( It may include a mounting plate 222 provided at the center of rotation of 220) and coupled to the rotation axis. Air may flow into the rear of the drum through the suction hole 224.

The drum rear surface 220 may further include a reinforcing rib 225 extending from the peripheral portion 221 toward the center of rotation. The reinforcing rib 225 may extend to avoid the suction hole 224. The reinforcing rib 225 has the effect of preventing the rigidity of the drum back surface 220 from being reduced due to the suction hole 224. The reinforcing rib 225 may be provided to extend radially from the outer peripheral surface of the mounting plate 222 toward the inner peripheral surface of the peripheral portion 221.

In addition, the drum rear surface 220 may further include a circumferential rib 227 extending in the circumferential direction of the drum rear surface 220 to connect the reinforcing ribs 225 to each other. The suction hole 224 may be disposed between the reinforcing rib 225, the circumferential rib 227, and the peripheral portion 221. The reinforcing rib 225 and the circumferential rib 227 have the effect of preventing the drum back surface 220 from being deformed even when rotational force is transmitted from the motor unit 500.

The inflow duct 821 may be provided to communicate with the duct communication hole 417 of the front plate 410 and communicate with a flow path installed inside the front plate 410. The moving duct 822 may be provided extending from the end of the inlet duct 821 toward the rear of the drum 200, and the discharge duct 823 may be provided at the end of the moving duct 822. It may be provided to guide the air to the drum 200.

The blower 8231 may be located on the downstream side of the discharge duct 823, and the blower 8231 may provide a space where a circulation flow fan is installed. When the circulation fan flow fan operates, the air flowing into the inflow duct 821 may be discharged to the upper part of the blowing unit 8231.

Meanwhile, a heat exchange unit 900 that can cool and heat the air circulating inside the drum 200 may be installed in the base 800. The heat exchange unit 900 may include a compressor 930 that is connected to the first heat exchanger and the second heat exchanger and supplies compressed refrigerant. The compressor 930 may be provided so as not to directly exchange heat with circulating air, and may be located outside the circulation passage portion 820.

Additionally, the heat exchange unit may include a circulation flow fan motor 951 that is supported at the rear of the blowing unit 8231 and rotates the circulation flow fan. The circulation flow fan motor 951 may be coupled to the rear of the blowing unit 8231.

Meanwhile, the clothing treatment device according to an embodiment of the present invention is coupled to the circulation passage portion 820 and directs hot air discharged from the circulation passage portion 820 to the rear of the drum 200 or the rear plate 420. It may further include a connector 850 that guides to.

The connector 850 may be disposed above the discharge duct 823 to guide hot air heated through the second heat exchanger 920 upward from the discharge duct 823. Additionally, the connector 850 may be coupled to the opening provided on the upper side of the blower 8231.

The connector 850 may be provided to form a flow path inside. The connector 850 may be provided to evenly guide the flow of air generated by the circulation flow fan to the rear plate 420. That is, the connector 850 may be provided so that the area of the flow path increases as the distance from the blower 8231 increases.

The rear plate 420 may be coupled to the base 800 or supported on the base 800 and positioned at the rear of the drum 200. The rear plate 420 is located opposite the front plate 410, and is recessed in the rear panel 421 to form a passage through which air flows, and is connected to the rear panel 421 facing the front plate 410. It may include a duct portion 423 provided to guide discharged air to the drum.

The rear plate 420 may include a mounting portion 425 to which the driving unit is coupled or supported. The mounting portion 425 may be provided to penetrate the rear panel 421 and may be disposed on the inner peripheral surface of the duct portion 423. The mounting portion 425 may be provided to be spaced radially inward from the inner peripheral surface of the duct portion 423.

Here, the driving unit may refer to a combination of the reducer 600 and the motor unit 500, as described above. And the driving unit may refer only to the motor unit 500. In other words, the component that generates power and transmits the rotational power to the drum can be referred to as a driving unit.

The driving unit may be mounted on the mounting unit 425. The mounting unit 425 may support the load of the driving unit. The driving unit may be connected to the drum 200 while being supported on the mounting unit 425.

The duct portion 423 may be provided to accommodate a portion of the drum rear surface 220. The duct portion 423 may form a flow path through which air moves together with the drum rear surface 220.

The driving unit may be installed on the mounting unit 425 to prevent interference with the duct unit 423. in other words. The driving unit may be arranged to be spaced radially inward from the inner peripheral surface of the duct portion 423. The driving unit is installed on the mounting unit 425, and is installed so that its rear side is exposed to the outside so that it can be cooled by external air.

The driving unit may include a motor unit 500 that provides power to rotate the drum 200. The motor unit 500 may include a stator 510 that generates a rotating magnetic field, and a rotor 520 that is rotated by the stator 510.

The rotor 520 may be an outer rotor type that accommodates the stator 510 and rotates around the circumference of the stator 510 . At this time, a drive shaft may be coupled to the rotor 520 and directly connected to the drum 200 through the stator 510 and the mounting portion 425. In this case, the rotor 520 can directly transmit power to rotate the drum 200.

The rotor 520 may be coupled to the drive shaft through the washer portion 540. The washer portion 540 may perform the function of connecting the drive shaft and the rotor 520. Since the contact area between the rotor 520 and the drive shaft can be increased by the washer portion 540, the rotation of the rotor 520 can be transmitted more effectively.

The reducer 600 may be provided to connect the motor unit 500 and the drum 200. The reducer 600 may convert the power of the motor unit 500 to rotate the drum 200. The reducer 600 is disposed between the motor unit 500 and the drum 200 and can receive the power of the motor unit 500, convert it, and transmit it to the drum 200. The reducer 600 may be provided to convert the RPM of the rotor into a small RPM and increase the torque value to transmit it to the drum 200.

Specifically, the reducer 600 may be coupled to the rotor 520 and a drive shaft that rotates together with the rotor 520. The reducer 600 includes a gear assembly inside that engages and rotates with the drive shaft to change the rpm of the drive shaft and increase torque, and the gear assembly is coupled to the drum 200 to rotate the drum. It can be connected to the rotation axis. Therefore, when the drive shaft 530 rotates, the drum rotation shaft rotates at a slower rpm than the drive shaft, but can rotate with greater torque.

The performance of this reducer 600 may depend on whether the drive shaft and the drum rotation shaft can maintain coaxiality. In other words, if the drive shaft and the drum rotation shaft are misaligned, there is a risk that the parts constituting the gear combination inside the reducer 600 may become loose or disengaged from at least one of the drive shaft and the drum rotation shaft. Therefore, the power of the drive shaft may not be properly transmitted to the drum rotation shaft, or a phenomenon in which the drive shaft may spin may occur.

Additionally, if the drive shaft and the drum rotation shaft are distorted even temporarily, the gears inside the reducer 600 may be misaligned and collide with each other, resulting in unnecessary vibration or noise.

In addition, if the angle at which the drive shaft and the drum rotation shaft are twisted even temporarily becomes severe, there is a risk that the reducer 600 may completely deviate from its original position or be damaged.

In order to prevent this, it is desirable for clothing processing devices equipped with a reducer to fix the reducer 600 and the motor unit 500 to a support that maintains its original state without deformation even when an external force is generated.

For example, in the case of a washing machine, the tub accommodating the drum is first fixed to the cabinet, and then the motor unit and the reducer are installed in a bearing housing made of a rigid body built by injection molding inside the tub. A differential fixation method can be applied. Accordingly, even if significant vibration occurs in the tub, the reducer and the driving unit may tilt or vibrate together with the bearing housing or the fixed steel plate. As a result, the reducer and the drive unit themselves can always remain coupled, and the drive shaft and the rotation shaft can remain coaxial.

However, since the laundry treatment apparatus of the present invention is equipped with a dryer, the configuration of a tub fixed inside the cabinet is omitted. In addition, the back panel of the cabinet is made of a relatively thin plate, so even if the stator 510 is fixed, the back panel can easily vibrate or bend due to a repulsive force when the rotor 520 rotates. If the rear panel vibrates or is bent even temporarily, a problem may occur in which the rotation centers of the reducer 600 and the motor unit 500, which are disposed in conjunction with the drum 200, are distorted from each other.

Additionally, because the back panel is made of a thin steel plate, it may be difficult to support both the reducer 600 and the motor unit 500. For example, when the reducer 600 and the motor unit 500 are coupled to the rear panel in parallel, a rotation moment is generated due to the total length and self-weight of the reducer 600 and the motor unit 500. As a result, a problem may occur in which the reducer 600 sags downward. As a result, the drum rotation shaft itself coupled to the drum may be misaligned with the reducer 600 and may not be maintained coaxially with the drive shaft.

Meanwhile, it may be considered that the stator 510 is coupled to the rear plate 420 to support the motor unit 500. If a large amount of clothing is stored inside the drum 200 or if eccentricity occurs, the drum rotation axis may be twisted to follow the arrangement of the clothing each time the drum 200 rotates. At this time, since the stator 510 is separate from the drum 200 and fixed to the rear plate 420, the drum rotation axis may vibrate at a different width or be tilted at a different angle than that of the stator 510. Accordingly, the coaxiality of the drum rotation shaft and the drive shaft may not be maintained.

From another perspective, the drum 200 may be supported by the front plate 410 and the rear plate 420 and the installed position may be fixed at a certain level. Accordingly, the position of the drum rotation axis coupled to the drum 200 can also be fixed at a certain level. Therefore, even if vibration occurs in the drum 200, the vibration can be cushioned by at least one of the front plate 410 or the rear plate 420.

However, when the vibration generated in the drum 200 is transmitted to the motor unit 500, even if the reducer 600 and the motor unit 500 are fixed to the rear plate 420, the drum rotation shaft The vibration amplitude of the motor unit 500 and the rear plate 420 may be greater than the vibration amplitude of the motor unit 500 and the rear plate 420. Even at this time, a problem may occur in which the drive shaft and the drum rotation shaft cannot maintain coaxiality.

To solve this problem, the laundry treatment device of the present invention can be fixed by coupling the motor unit 500 to the reducer 600. In other words, the reducer 600 itself can serve as a reference point for the entire driving unit. In other words, the reducer 600 can serve as a reference for the amount of vibration and tilt angle of the entire driving unit.

Since the motor unit 500 is not fixed to other components of the laundry treatment device but is only fixed to the reducer 600, when vibration or an external force is transmitted to the drive unit, the reducer 600 is tilted or vibrates. When doing so, the motor unit 500 may always be tilted or vibrated simultaneously with the reducer 600.

As a result, the reducer 600 and the motor unit 500 can form one vibration system, and the reducer 600 and the motor unit 500 are fixed without moving relative to each other. It can be maintained.

The stator 510 of the motor unit 500 may be directly coupled to and fixed to the reducer 600. As a result, the position where the drive shaft 530 is installed relative to the reducer 600 may not change. The center of the drive shaft 530 and the center of the reducer 600 may be aligned with each other, and the drive shaft 530 may rotate while maintaining the same axis as the center of the reducer 600. .

The first axis M1 may refer to an imaginary line extending forward and backward along the rotation center of the drum 200. That is, the first axis M1 may be provided parallel to the X axis.

The second axis (M2) and the third axis (M3) may mean an imaginary line extending from the front to the rear top of the laundry treatment device. That is, the second axis (M2) and the third axis (M3) may be provided parallel to the XZ plane or perpendicular to the Y axis.

The first axis (M1) and the second axis (M2) may intersect each other in the reducer (600). Additionally, the first axis (M1) and the third axis (M3) may intersect at the mounting portion 425.

The reducer 600 and the motor unit 500 may be designed to be arranged along the first axis (M1) parallel to the ground when there is no load on the drum 200 or the motor unit 500 is not operating. there is.

However, when vibration occurs in the drum 200 or the motor unit 500, the vibration is transmitted to the reducer 600 and the reducer 600 is tilted, temporarily causing the reducer 600 to rotate on the second axis ( It may be tilted along M2).

At this time, since the motor unit 500 is coupled to the reducer 600, it may vibrate or tilt together with the reducer 600. Accordingly, the motor unit 500 may be arranged parallel to the reducer 600 on the second axis M2. Accordingly, the drive shaft and the drum rotation shaft may also be arranged in parallel along the second axis (M2).

As a result, even if the reducer 600 is tilted, the motor unit 500 can move integrally with the reducer 600, and the drive shaft and the drum rotation shaft can maintain coaxiality.

The reducer 600 may be coupled to and fixed to the rear plate 420. In this case, the reducer 600 will tilt or vibrate while coupled to the rear plate 420, so that the rear plate 420 is connected to the reducer 600, the motor unit 500, and the drum 200. It can be seen that it plays the role of the center of a vibration system that includes. Even in this case, the motor unit 500 may not be directly coupled to the rear plate 420 but may be coupled and fixed only to the reducer 600.

The reducer 600, the motor unit 500, and the drum 200 are arranged side by side along the first axis (M1), and then the reducer 600 is moved by vibration of the drum 200 or the motor unit 500. (600) may be inclined parallel to the third axis (M3). The third axis M3 may pass through a reducer 600 coupled to the rear plate 420. At this time, since the reducer 600 and the motor unit 500 are coupled, the motor unit 500 may also be tilted parallel to the third axis M3 like the reducer 600.

Ultimately, the motor unit 500 and the drum 200 are coupled to the reducer 600, so that the motor unit 500 and the drum 200 are tilted parallel to each other with respect to the reducer 600. can be vibrated at the same time.

The above-mentioned meaning of coaxiality and coincidence does not mean physically perfect coaxiality and coincidence, but is a concept that allows an error range that can be recognized in mechanical engineering or a range at a level that a person skilled in the art would recognize as coaxiality or coincidence. For example, the range in which the drive shaft 530 and the drum rotation shaft 6341 are deviated by less than 5 degrees can be defined as coaxial or coincident. However, this angle value is only an example, and the allowable design error may change.

Since the drive shaft 530 rotates relative to the reducer 600 but is fixed to prevent tilting, and the stator 510 is also fixed to the reducer 600, the stator 510 and the rotor ( The interval of 520) can always be maintained. As a result, a collision between the stator 510 and the rotor 520 can be prevented, and noise or vibration that may occur due to a change in the center of rotation of the rotor 520 while rotating the stator 510 is fundamentally prevented. can be blocked.

The drum rotation shaft 6341 is provided to extend from inside the reducer 600 toward the drum 200, and may vibrate together with the reducer 600 and tilt together with the reducer 600. That is, the drum rotation shaft 6341 is provided to rotate in the reducer 600, and its installed position can be fixed. As a result, the drum rotation shaft 6341 and the drive shaft 530 can always be arranged in parallel and form a coaxial axis. In other words, the center of the drum rotation shaft 6341 and the center of the drive shaft 530 can be maintained aligned with each other.

Meanwhile, a sealing portion 450 may be provided between the drum rear surface 220 and the rear plate 420. The sealing part 450 is between the drum back 220 and the rear plate 420 so that the air flowing into the duct part 423 of the rear plate 420 does not flow out to the outside but flows into the suction hole 224. It can be sealed.

The sealing part 450 may be disposed on the outer and inner surfaces of the duct part 423, respectively. A first seal 451 may be provided on the radial outer side of the duct portion 423, and a second seal 452 may be provided on the radial inner side of the duct portion 423. The first seal 451 can prevent hot air from leaking outward in the radial direction between the drum back surface 220 and the duct portion 423, and the second seal 452 can prevent hot air from leaking outward between the drum back surface 220 and the duct portion 423. It is possible to prevent hot air from leaking inward in the radial direction between the duct portions 423.

In other words, the sealing portion 450 may be disposed on the radial outer and inner sides of the suction hole 224, respectively. The first seal 451 may be provided on the radial outside of the suction hole 224, and the second seal 452 may be provided on the radial inside of the suction hole 224.

In order to prevent hot air from leaking, the sealing part 450 is preferably provided in contact with both the drum back surface 220 and the rear plate 420. Since the drum 200 rotates during the operation of the clothing treatment device, friction is continuously applied to the sealing portion 450 by the drum rear surface 220. Therefore, it would be desirable for the sealing part 450 to be made of a material that can seal between the drum back surface 220 and the duct part 423 without deteriorating performance despite frictional force and frictional heat generated during rotation.

Meanwhile, a motor unit 500 or a reducer 600 may be coupled to the rear of the rear plate 420. Since the rear plate 420 may be formed of a thin steel plate material, the reducer 600 and the drum 200 There is a possibility that bending or deformation may occur due to the load transmitted to the reducer 600. That is, in order to install the reducer 600, motor unit 500, etc., the rigidity of the rear plate 420 needs to be secured.

To this end, the rear plate 420 may further include a bracket 700 to reinforce coupling rigidity. A bracket 700 may be additionally coupled to the rear plate 420, and the reducer 600 and the motor unit 500 may be coupled to the rear plate 420 by the bracket 700.

The reducer 600 may be combined with the bracket 700 and the rear plate 420 at the same time. Using a fastening member, the reducer 600, rear plate 420, and bracket 700 can be penetrated and coupled at the same time. Rigidity of the rear plate 420 can be secured by combining the bracket 700. A reducer 600, a motor unit 500, etc. may be coupled to the rear plate 420, which has secured rigidity.

The reducer 600 may be first coupled to the bracket 700 and then the bracket 700 may be coupled to the rear plate 420. That is, the reducer may not be directly coupled to the rear plate 420 but may be fixed to the rear plate 420 through the bracket 700.

Meanwhile, when the motor unit 500 or the reducer 600 is coupled to the rear of the rear plate 420, the motor unit 500 and the reducer 600 may be exposed to the outside. Therefore, it is necessary to prevent the motor unit 500 from being exposed by being coupled to the rear of the rear plate 420. Additionally, the duct portion 423 may be heated by hot air. Therefore, it may be necessary to insulate the rear side of the duct portion 423.

The rear cover 430 is coupled to the rear of the rear plate 420 to prevent the duct part 423 and the motor part 500 or reducer 600 from being exposed to the outside. The rear cover 430 may be arranged to be spaced apart from the duct portion 423 and the driving unit.

The rear cover 430 has the effect of preventing the motor unit 500 from being damaged by external interference or heat loss occurring through the duct unit 423, thereby reducing drying efficiency.

Figure 7 shows the appearance of a reducer according to an embodiment of the present invention.

The reducer 600 may include

reducer housings

610 and 620 that form the exterior. The reducer housing may include a first housing 610 facing the drum and a second housing 620 facing the motor unit.

The reducer 600 may include a gearbox. The gearbox may be provided to receive power from the motor unit, convert the RPM of the motor unit into a small RPM, increase the torque value, and transmit it to the drum. Most of the gearbox is accommodated inside the second housing 620, and the first housing 610 may be provided to shield the inside of the reducer 600. As a result, the overall thickness of the reducer 600 can be reduced. The detailed configuration of the gearbox will be described later.

The first housing 610 includes a first housing blocking body 611 provided to shield the second housing 620 and extends in a direction away from the second housing 620 from the first housing blocking body 611. It may include a first housing bearing portion 612. The first housing shaft portion 612 can accommodate the drum rotation shaft 6341 and can rotatably support the drum rotation shaft 6341.

The first housing 610 may include a stator coupling portion 613 provided to support the motor portion. The stator coupling portion 613 may be provided to extend from the circumferential surface of the first housing blocking body 611 in a direction away from the first housing bearing portion 612.

The stator coupling portion 613 may include a stator fastening hole 615 into which the motor portion can be fastened. The stator fastening hole 615 may be recessed in the stator coupling portion 613. A separate fastening member may be inserted into the stator fastening hole 615. The stator coupling portion 613 and the motor portion can be coupled using the fastening member.

The first housing 610 may further include a coupling guide 614 that guides coupling of the motor unit. The coupling guide 614 may be provided to extend from the circumferential surface of the first housing blocking body 611 in a direction away from the first housing bearing portion 612. The coupling guide 614 may extend from the first housing blocking body 611 to be connected to the stator coupling portion 613. The coupling guide 614 can guide the position of the stator 510 when coupling the stator 510 to the stator coupling portion 613. This can improve assembly.

Referring to FIG. 8, the second housing 620 can accommodate a gear assembly therein. In general, a gearbox coupled to the reducer 600 may include a sun gear, a planetary gear revolving around the sun gear, and a ring gear that accommodates the planetary gear and guides the planetary gear to rotate. The second housing 620 is a second housing coupling body 621 coupled to the first housing 610, and extends from the second housing coupling body 621 in a direction away from the first housing 610 to form a gearbox. A second housing blocking body 622 forming a space in which the second housing blocking body 622 is accommodated, and a second housing extending away from the first housing 610 on the inner peripheral surface of the second housing blocking body 622 to support the driving shaft 530. It may include a bearing part.

The center of the first housing 610 and the center of the second housing 620 may be designed to be disposed on the same axis. It is advantageous for power transmission if the drive shaft 540 and the drum rotation shaft 6341 are located on the same axis. Therefore, it is preferable that the first housing bearing portion 612 rotatably supporting the drum rotation shaft 6341 and the second housing bearing portion rotatably supporting the driving shaft 540 are coupled to form the same axis.

The drive shaft 530 may be inserted into the second housing 620 and rotatably supported within the second housing 620 . A washer portion 540 that rotatably supports the rotor 520 may be coupled to the drive shaft 530. The washer portion 540 has a receiving body 542 at the center of which a shaft support hole 543 for receiving the drive shaft 530 is formed. It extends radially from the outer peripheral surface of the receiving body to form a surface on which the rotor is coupled. It may include a washer coupling body 541. The shaft support hole 543 may be provided in a groove shape corresponding to the protrusion formed on the outer peripheral surface of the drive shaft 530 so that the protrusion can be coupled thereto.

The washer portion 540 may include one or more washer coupling protrusions 5411 that protrude from the washer coupling body 541 in a direction away from the reducer. Additionally, the washer portion 540 may include one or more washer coupling holes 5412 penetrating the washer coupling body 541.

The washer engaging protrusion 5411 may be coupled to a receiving groove formed on the rotor. The washer coupling hole 5412 can be used to couple the rotor and the washer portion 540 by inserting a fastening member penetrating the rotor.

The washer coupling protrusion 5411 and the washer coupling hole 5412 may be provided in plural numbers, alternately positioned along the circumferential direction on the surface of the washer coupling body 541.

Figure 8 is an enlarged cross-sectional view showing the driving part in detail.

The driving unit may include a motor unit 500 that generates rotational power and a reducer that reduces the rotational speed of the motor unit 500 and transmits it to the drum. The reducer 600 may include a drum rotation shaft 6341 that rotates the drum.

The motor unit 500 may include a stator 510 that receives external power and generates a rotating magnetic field, and a rotor 520 that surrounds the outer peripheral surface of the stator 510. Permanent magnets may be disposed on the inner peripheral surface of the rotor 520.

The permanent magnet located on the inner peripheral surface of the rotor 520 can move in a specific direction due to the rotating magnet generated by the stator 510, and the permanent magnet can be fixed to the inner peripheral surface of the rotor 520. Accordingly, the rotor 520 can rotate by the rotating magnetic field of the stator 510.

A drive shaft 530 that rotates together with the rotor 520 and transmits the rotational power of the rotor 520 may be coupled to the rotation center of the rotor 520. The drive shaft 530 may be provided to rotate together with the rotor 540. The drive shaft 530 may be coupled to the rotor 540 through a washer portion 540.

The drive shaft 530 can be directly connected to the rotor 520, but when connected through the washer portion 540, it can be more firmly coupled to the rotor 520, thereby more effectively controlling the rotational force of the rotor 520. It can be delivered. In addition, there is an effect of increasing the durability of the drive shaft 530 by preventing a load from being intensively applied to the drive shaft 530.

The drive shaft 530 may be directly connected to the drum, but since the drive shaft 530 rotates at the same speed as the rotor 520, deceleration may be necessary. Accordingly, the drive shaft 530 may be connected to a reducer, and the reducer may be connected to the drum. That is, the reducer can rotate the drum by slowing down the rotation of the drive shaft 530.

The reducer 600 may include a first housing 610 and a second housing 620 that form the exterior, and a gearbox 630 that reduces the power of the drive shaft 530. The second housing 620 provides a space for accommodating the gearbox 630, and the first housing 610 can shield the accommodating space provided by the second housing 620.

The second housing 620 includes a second housing coupling body 621 coupled to the first housing 610, and extends rearward from the inner peripheral surface of the second housing coupling body 621 to form a receiving space and includes a gearbox ( It may be composed of a second housing blocking body 622 that accommodates the second housing blocking body 622, and a second housing bearing portion 623 extending rearward from the second housing blocking body 622 and provided to accommodate the driving shaft 530. .

The gearbox 630 may include a ring gear 633 installed along the inner peripheral surface of the second housing blocking body 622. One or more planetary gears 632 may be provided on the inner peripheral surface of the ring gear 633 and are gear-combined with the ring gear 633, and on the inside of the ring gear 633, the planetary gears 632 and the drive shaft may be provided. A sun gear 631 that rotates together with 530 may be provided.

The sun gear 631 may be coupled to the drive shaft 530 and rotated. The sun gear 631 may be provided as a separate member from the drive shaft 530, but is not limited to this and the sun gear 631 may be formed integrally with the drive shaft 530.

The sun gear 631, planetary gear 632, and ring gear 633 may be provided as helical gears. If each gear is provided as a helical gear, noise can be reduced and power transmission efficiency can be increased. However, it is not limited to this, and the sun gear 631, planet gear 632, and ring gear 633 may be provided as spur gears.

As an example of the operation of the gearbox 630, as the rotor rotates, the drive shaft 530 and the sun gear 631 connected to the drive shaft 530 rotate, and the planetary gear 632 is gear-engaged on the outer peripheral surface of the sun gear 631. ) can be rotated by being geared between the ring gear 633 and the sun gear 631.

The planetary gear 632 may include a planetary gear shaft 6323 inserted into the rotation center. The planetary gear shaft 6323 may rotatably support the planetary gear 632.

The reducer may further include a first carrier 6342 and a second carrier 6343 that support the planetary gear shaft 6323. The planetary gear shaft 6323 may be supported by the second carrier 6343 at the front and the first carrier 6342 at the rear.

The drum rotation shaft 6341 may be provided to extend from the rotation center of the second carrier 6343 in a direction away from the motor unit. The drum rotation shaft 6341 may be provided in a separate configuration from the second carrier 6343 and may be coupled to rotate together. On the other hand, the drum rotation axis 6341 may extend from the second carrier 6343 and be formed integrally with the second carrier 6343.

The drum rotation shaft 6341 can be coupled to the drum to rotate the drum. As described above, the drum rotation shaft 6341 may be coupled to the drum through a connection member such as a bushing unit, or may be directly coupled to the drum without a separate connection member.

The drum rotation axis 6341 may be supported by the first housing 610. The first housing 610 includes a first housing blocking body 611 that shields the receiving space of the second housing 620 and extends in a direction away from the second housing 620 from the first housing blocking body 611. It may include a first housing bearing portion 612 that accommodates the drum rotation shaft 6341. A first bearing 660 and a second bearing 670 are press-fitted on the inner peripheral surface of the first housing bearing portion 612 to rotatably support the drum rotation shaft 6341.

The first housing 610 and the second housing 620 may be coupled to each other through a reducer fastening member 681. Additionally, the reducer fastening member 681 can penetrate the first housing 610 and the second housing 620 at the same time and couple the two members. In addition, the reducer fastening member 681 penetrates the first housing 610, the second housing 620, and the rear plate 420 at the same time to couple the first housing 610 and the second housing 620. At the same time, the reducer 600 can be fixed to the rear plate 420.

The rear plate 420 may be formed of a thin steel plate. Therefore, it may be difficult to secure rigidity to support all of the reducer 600, the motor unit 500 coupled to the reducer 600, and the drum 200 connected to the reducer 600. Therefore, when coupling the reducer 600 to the rear plate 420, the bracket 700 can be used to secure the rigidity of the rear plate 420. The bracket 700 may be made of a material with higher rigidity than the rear plate 420 and may be coupled to the front or back of the rear plate 420.

The bracket 700 is coupled to the front of the rear plate 420 to secure rigidity to which the reducer 600 can be coupled, and the reducer 600 is connected to the rear plate 420 and the bracket 700. can be combined at the same time. A fastening member such as a bolt may be used to couple the rear plate 420, the bracket 700, and the reducer.

In addition, in order to fix the reducer 600 to the rear plate 420, the reducer fastening member 681, which was used to couple the first housing 610 and the second housing 620, can be used. . That is, the reducer fastening member 681 can penetrate and couple the second housing 620, the first housing, the rear plate 420, and the bracket 700 at once. When combined in this way, the rear plate 420 can be supported by the bracket 700 at the front and the first housing 610 at the rear, so rigidity can be secured even when combined with the reducer 600. . However, it is not limited to this, and first, only the first housing 610 and the second housing 620 are coupled using the reducer fastening member 681, and then the reducer 600 is connected to the rear plate 420 using a separate fastening member. ) can be combined with.

Additionally, a stator coupling portion 613 to which the motor portion 500 can be coupled may be formed on the radial outer side of the first housing 610. The stator coupling portion 613 may include a coupling groove formed by recessing the stator coupling portion 613.

The stator 510 may be directly coupled to the rear plate 420, but may also be coupled to the stator coupling portion 613. The stator 510 may include a fixing rib 512 provided on the inner peripheral surface to support the stator. The fixing rib 512 may be coupled to the stator coupling portion 613. The fixing rib 512 and the stator coupling portion 613 may be coupled to each other by a stator coupling pin 617.

The motor unit 500 is coupled to the reducer 600 while being spaced apart from the rear plate 420, so that the motor unit 500 and the reducer 600 form one vibrating body. Therefore, even if vibration is applied from the outside, the drive shaft 530 coupled to the rotor 520 and the drum rotation shaft 6341 connected to the reducer 600 can easily maintain coaxiality.

There is a risk that the direction of the drum rotation shaft 6341 may be distorted due to vibration of the drum 200. However, since the motor unit 500 is coupled to the first housing 610 that supports the drum rotation shaft 6341, it is maintained by the first housing 610 even if the axial direction of the drum rotation shaft 6341 is twisted. The axial direction of the drive shaft 530 will also be similarly distorted. That is, the motor unit 500 is moved integrally with the reducer 600, so that the drum rotation shaft 6341 and the drive shaft 530 can maintain coaxiality even when an external force is applied.

Due to the coupling structure described above, the efficiency and reliability with which the power generated by the motor unit 500 is transmitted to the drum 200 increases, and the axle distortion caused by the drum rotation shaft 6341 and the drive shaft 530 increases. There is an effect of preventing wear of the gearbox 630, reduction in power transmission efficiency, and reduction in durability and reliability.

Figure 9 shows a base and a rear plate according to an embodiment of the present invention.

Referring to Figure 9, the rear plate 420 may be located at the rear of the drum. The rear plate 420 can guide hot air discharged from the circulation passage portion 820 to the drum. That is, the rear plate 420 is located at the rear of the drum and can form a flow path so that hot air is evenly supplied to the entire drum.

The rear plate 420 may include a rear panel 421 facing the rear of the drum, and a duct portion 423 that is recessed rearward from the rear panel 421 to form a flow path. The duct portion 423 may be provided by being pressed backward from the rear panel 421. The duct portion 423 may be provided to partially accommodate the rear surface of the drum.

The duct portion 423 may include an inlet portion 4233 located behind the circulation passage portion and a flow portion 4231 located behind the drum. The moving part 4231 may be provided to accommodate a portion of the drum. The moving part 4231 may partially accommodate the drum and form a flow path provided at the rear of the drum.

The moving part 4231 may be provided in an annular shape to face the suction hole formed on the back of the drum. The moving part 4231 may be provided to be recessed in the rear panel 421. That is, the moving part 4231 is provided to be open at the front, and can form a flow path with the back of the drum. You can.

When the front of the moving part 4231 is provided to be open, hot air moved to the moving part 4231 can be moved directly to the drum without passing through a separate component. Therefore, it is possible to prevent heat loss from occurring as hot air passes through a separate component. In other words, there is an effect of increasing drying efficiency by reducing heat loss from hot air.

The rear plate 420 may include a mounting portion 425 provided on the radial inner side of the moving portion 4231. The mounting portion 425 may provide a space where the reducer 600 or the motor portion 500 is coupled. That is, the rear plate 420 may include a mounting portion 425 provided on the inside, and a moving portion 4231 provided in an annular shape on the radial outer side of the mounting portion 425.

Specifically, the flow portion 4231 may include an outer flow portion 4231a surrounding the inner space through which hot air flows from the outside. Additionally, the flow portion 4231 may include an inner flow portion 4231b surrounding the inner space in which hot air flows. That is, the outer flow portion 4231a may form the outer circumference of the flow portion 4231, and the inner flow portion 4231b may form the inner circumference of the flow portion 4231.

Additionally, the flow portion 4231 may include a flow depression surface 4232 that forms the rear surface of the flow path through which hot air moves. The flow depression surface 4232 may be provided to connect the flow outer peripheral portion 4231a and the flow inner peripheral portion 4231b. That is, a space in which hot air discharged from the circulation passage portion 820 flows can be formed by the inner flow portion 4231b, the outer flow portion 4231a, and the flow depression surface 4232.

In addition, the flow depression surface 4232 prevents hot air from leaking backward and guides the hot air toward the drum. That is, the flow depression surface 4232 may mean the depression surface of the flow portion 4231.

The inlet portion 4233 may be positioned to face the circulation passage portion 820. The inlet part may be positioned to face the blowing part 8231. The inlet portion 4233 may be provided to be recessed rearward from the rear panel 421 to prevent interference with the blowing portion 8231. The upper side of the inlet part 4233 may be connected to the flow part 4231.

The laundry treatment device according to an embodiment of the present invention may include a connector 850 connected to the blower 8231. The connector 850 can guide hot air discharged from the blowing unit 8231 to the flowing unit 4231. The connector 850 has a flow path formed inside it, so that hot air discharged from the blowing unit 4231 can be guided to the moving unit 4231. That is, the connector 850 may form a flow path connecting the blowing unit 8231 and the moving unit 4231. The cross-sectional area of the flow path provided inside the connector 850 may be increased as the distance from the blower 8231 increases.

The connector 850 may be positioned to face the inlet 4233. The inlet portion 4233 may be formed to be recessed backward to prevent interference with the connector 850. Additionally, the upper end of the connector 850 may be provided to partition the flow portion 4231 and the inlet portion 4233. That is, hot air discharged from the connector 850 flows into the flowing part 4231, but can be prevented from flowing into the inlet part 4233.

The connector 850 may be provided to evenly supply hot air to the moving part 4231. The connector 850 may be provided so that its width increases as it moves away from the blower 8231. The top of the connector 850 may be located along the circumferential extension line of the floating outer peripheral portion 4231a.

Accordingly, the hot air discharged from the connector 850 may not be moved to the inflow part 4233 but may be supplied entirely to the flow part 4231. The connector 850 can prevent hot air from concentrating on one side of the moving part 4231 and supply hot air evenly inside the drum. Therefore, there is an effect of increasing the drying efficiency of clothes.

The connector 850 may be provided with a width that increases toward the upstream side, so that the speed of hot air moving along the connector 850 may be provided to decrease along the flow direction. That is, the connector 850 can perform the function of a diffuser that adjusts the speed of hot air. The connector 850 can reduce the speed of hot air and prevent hot air from being supplied concentrated to only a specific part of the drum.

Due to the shape of the connector 850 described above, the inlet portion 4233 is provided to face the connector 850 and is provided to prevent interference with the connector 850. The width of the inlet portion 4233 increases as the distance from the blower 8231 increases. can be provided to increase. Due to the shape of the inlet portion 4233, the overall shape of the duct portion 423 may be shaped like a '9' when viewed from the front.

Since the drum is provided to rotate during the drying cycle, the drum can be spaced apart from the moving part 4231 by a predetermined distance. Hot air may leak out through the separation space.

Accordingly, the clothing treatment apparatus may further include a sealing part 450 that prevents hot air from leaking into the space between the drum and the moving part 4231. The sealing part 450 may be located along the circumference of the moving part 4231.

The sealing part 450 may include a first seal 451 provided along the outer circumference of the moving part 4231. The first seal 451 may be provided between the drum and the outer circumference of the moving part 4231. In addition, the first seal 451 is provided in contact with both the drum back surface 220 and the rear plate 420, so that leakage can be more effectively prevented.

Meanwhile, the first seal 451 may be provided to contact the front surface of the connector 850. Additionally, the first seal 451 may be provided to contact the top of the connector 850. The connector 850 may form a flow path through which hot air flows together with the moving part 4231. Therefore, the first seal 451 is provided in contact with the connector 850 to prevent hot air from leaking between the drum and the connector 850.

The sealing part 450 may include a second seal 452 provided along the inner circumference of the moving part 4231. The second seal 452 may be provided between the drum and the inner circumference of the moving part 4231. Additionally, the second seal 452 may be provided to contact both the drum rear surface 220 and the rear plate 420. The second seal 452 can prevent hot air moving along the moving part 4231 from leaking toward the mounting part 425.

Since the drum 200 rotates during the operation of the clothing treatment device, friction is continuously applied to the sealing portion 450 by the drum rear surface 220. Therefore, it would be desirable for the sealing part 450 to be made of a material that can seal between the drum back surface 220 and the moving part 4231 without deteriorating performance despite the frictional force and frictional heat generated during rotation.

Figure 10 shows a coupling structure of a rear plate, a reducer, and a motor portion according to an embodiment of the present invention.

Referring to FIG. 10, the reducer 600 is supported on the rear plate 420, and the motor unit 500 may be coupled to the reducer 600. That is, the rear plate 420 may be provided to support both the reducer 600 and the motor unit 500.

At the rear of the rear plate 420, a motor unit 500 that provides rotational power and a reducer 600 that reduces the power of the motor unit and transmits it to the drum may be located.

The reducer 600 may be installed on the rear plate 420 to be located inside the duct portion 423. The reducer 600 may be located radially inside the moving part 4231 to prevent interference with the moving part 4231.

The gear device inside the reducer 600 may be damaged by the heat of the hot air moving along the moving part 4231. Accordingly, the moving part 4231 and the reducer 600 may be provided to be spaced apart from each other by a predetermined distance.

The reducer 600 may be coupled to penetrate the rear plate 420. Accordingly, the reducer 600 may be connected to the drum located in front of the rear plate 420.

The stator 510 may be coupled to the reducer 600. The stator 510 may be coupled to the reducer 600 and installed to be spaced apart from the rear plate 420. At this time, the reducer 600 is located between the drum and the motor unit and can support the drum and the motor unit to be spaced apart from the rear plate 420. That is, the reducer 600 can be the center supporting the drum and motor unit.

Meanwhile, the stator 510 includes a main body 511 provided in a ring shape, a fixing rib 512 extending from the inner peripheral surface of the main body 511 and coupled to the stator coupling portion 613 of the reducer, and the It may include teeth 514 that extend from the outer peripheral surface along the circumference of the main body 511 and are provided to wind the coil, and pole shoes 515 provided at the free end of the teeth 514 to prevent the coil from coming off. You can.

The rotor 520 may include a rotor body 521 provided in a cylindrical hollow shape. Additionally, the rotor 520 may include an installation body 522 that is recessed from the rear of the rotor body 521 to the front. The rotor 520 may have permanent magnets disposed along the inner peripheral surface of the rotor body 521.

The rotor 520 is coupled to the drive shaft 530 so that the rotational power of the rotor 520 can be transmitted to the outside through the drive shaft 530. The drive shaft 530 may be connected to the rotor 520 through a washer portion 540.

Additionally, the motor unit 500 may include a washer unit 540 that supports the drive shaft 530. The washer portion 540 may include a washer coupling body 541 coupled to the rotor. The washer coupling body 541 may be provided in a disk shape.

The washer portion 540 may include a receiving body 542 accommodated in the rotor. The receiving body 542 may be provided to protrude rearward from the washer coupling body 541. may include. The washer portion 540 may include an axial support hole 543 provided through the center of the receiving body 542. The drive shaft 530 may be inserted into the shaft support hole 543 and supported by the washer portion 540.

Additionally, the washer portion 540 may include a washer coupling hole 5412 provided through the washer coupling body 541. Additionally, the installation body 522 may include a rotor coupling hole 526 provided at a position corresponding to the washer coupling hole 5412. That is, the washer portion 540 and the rotor 520 may be coupled to each other by a coupling member that simultaneously penetrates and couples the washer coupling hole 5412 and the rotor coupling hole 526. That is, the washer portion 540 and the rotor 520 may be coupled to rotate together.

Additionally, the washer portion 540 may include a washer coupling protrusion 5411 that protrudes rearward from the washer coupling body 541. Additionally, the installation body 522 may include a washer projection receiving hole 525 provided to correspond to the washer coupling projection 5411. The washer coupling protrusion 5411 may be inserted into the washer protrusion receiving hole 525 to support the coupling of the washer portion 540 and the rotor 520.

Additionally, the rotor 520 may include a rotor installation hole 524 provided through the center of the installation body 522. The rotor installation hole 524 can accommodate the receiving body 542. Accordingly, the washer portion 540 can rotate together with the drive shaft 530 by the rotor 520 and can firmly support the combination of the drive shaft 530 and the rotor 520. Therefore, there is an effect of securing the durability and reliability of the entire motor unit 500.

Figure 11 shows the coupling structure of a reducer and a stator according to an embodiment of the present invention from the rear.

The stator 510 is fixed to the reducer 600 and has a main body 511 provided in a ring shape and a fixing rib extending from the inner peripheral surface of the main body 511 and coupled to the stator fastening hole 615 of the reducer. (512), a tooth 514 extending from the outer peripheral surface along the circumference of the main body 511 and provided to wind the coil, and a pole shoe provided at the free end of the tooth 514 to prevent the coil from coming off. It may include (515) and a terminal (not shown) that controls to supply current to the coil.

The stator 510 may penetrate the main body 511 and include a receiving space 513 provided inside the main body 511. The fixing rib 512 may be provided in plural pieces spaced apart from each other at a certain angle with respect to the receiving space 513 inside the main body 511, and a fixing member is installed inside the fixing rib 512. A hole 5121 is provided so that the fixed rib hole 5121 and the stator fastening hole 615 of the reducer can be coupled using a fixing member such as a pin.

When the stator 510 is directly coupled to the reducer 600, a part of the reducer 600 may be provided to be accommodated in the stator 510. In particular, when the reducer 600 is accommodated in the stator 510, the thickness of the entire driving unit including both the reducer and the motor unit is reduced, thereby further expanding the volume of the drum.

To this end, the reducer 600 may be provided with a diameter smaller than the diameter of the main body 511. That is, the first housing 610 and the second housing 620 may have a largest diameter smaller than the diameter of the main body 511. As a result, at least a portion of the reducer 600 can be accommodated and disposed in the main body 511. However, the stator coupling portion 613 may be extended to overlap the fixing rib 512 in the housing of the reducer. As a result, the stator coupling portion 613 is coupled to the fixing rib 512, and parts of the first housing and the second housing 620 can be located inside the main body 511.

Figure 12 shows the combination of a reducer and a motor unit according to an embodiment of the present invention.

The stator 510 may be coupled to the reducer 600. At least a portion of the reducer may be accommodated inside the main body 511 by being coupled to the stator coupling portion 613 that protrudes outward from the housing of the reducer 600. As a result, the center of the main body 511 and the center of the drive shaft 530 and the reducer 600 can always be maintained on the same axis.

Meanwhile, the rotor 520 may be arranged to receive the stator 510 while being spaced apart from the pole shoe 515 by a certain distance. Since the rotor 520 is fixed to the reducer 600 in which the drive shaft 530 is accommodated in the main body 511, the gap G1 between the rotor 520 and the stator 510 is always maintained. It can be maintained.

Accordingly, the rotor 520 and the stator 510 are prevented from colliding or temporarily twisted and rotating in the stator 510, thereby preventing noise or unnecessary vibration from occurring.

Meanwhile, a virtual first diameter line (K1) passing through the center of the reducer 600 and the center of the drive shaft 530, and a virtual second diameter line (K2) passing through the center of the main body 511. and the virtual third diameter line K3 passing through the center of the rotor 520 may all be disposed at the rotation center of the reducer 600.

As a result, the reducer 600 itself becomes the rotation center of the drive shaft 530, and since the stator 510 is directly fixed to the reducer 600, the drive shaft 530 is based on the reducer 600. It can be blocked from being distorted. As a result, the reliability of the reducer 600 can be guaranteed.

Figure 13 shows the drum structure of the laundry treatment device of the present invention in detail.

Referring to Figure 13 (a), the drum 200 is coupled to the drum body 210 provided to accommodate clothing and the rear of the drum body 210 to prevent the clothing accommodated in the drum body 210 from leaving. It may include a drum back surface 220 that prevents.

The front of the drum body 210 may be provided with an input port through which the clothes are input.

However, the thickness of the drum body 210 corresponds to the thickness of the metal plate and is relatively thin. As a result, when the drum body 210 rotates, the drum body 210 may be temporarily deformed due to inertial force or the concentration of the load of clothing, and the inlet of the drum body 210 may be distorted, etc. It may be difficult to maintain its shape.

To prevent this, it may be considered to use a metal steel plate that is thick and difficult to deform for the drum body 210. However, in this case, the overall weight of the drum 200 may become heavy, which may increase the load on the motor unit, and the difficulty of forming and manufacturing the drum body 210 may increase unnecessarily.

In order to improve this, the drum 200 of the present invention is coupled to the front of the drum body 210 and may further include a drum front portion 230 that can maintain the durability and shape of the drum body 210. .

Referring to Figures 13(b) and 13(c), the drum front portion 230 may be coupled to the front of the drum body 210 to form the front of the drum 200.

The drum front portion 230 may be provided in a ring shape to form a drum inlet 211 therein. The drum front portion 230 may be coupled and disposed along the front circumference of the drum body 210.

The drum front portion 230 may be made of the same material as the drum body 210. However, the drum front portion 230 may be made of a different material from the drum body 210.

For example, the drum front portion 230 may be made of a metal material with greater rigidity and durability than the drum body 210.

Additionally, the drum front portion 230 may be made of a metal plate larger than the thickness of the drum body 230.

The drum front part 230 has a body coupling part 232 coupled to the front of the drum body 210, and extends from the body coupling part 232 to form an inlet 211 of the drum 200. It may include a support 231.

The body coupling portion 232 is coupled along the front circumference of the drum body 210 and may serve to maintain the cross-sectional shape of the drum body 210.

The body coupling portion 232 may be coupled to the outer peripheral surface of the drum body 210 or the outer surface of the drum body 210. As a result, even if an excessive load is applied to the lower part of the drum front part 230 or a temporary impact or external force is applied, the drum front part 230 can be prevented from being bent inward or separated from the drum body 210. there is. Additionally, it is possible to prevent the outer peripheral surface of the drum body 210 from being damaged or deformed.

The support 231 may be provided to extend forward from the body coupling portion 232. The support 231 may be provided in a ring shape forming an inlet 211 on the inner peripheral surface, and is disposed further forward than the drum body 210 to support the support wheel 415 provided on the front plate 410. A supported area can be secured.

The diameter of the support 231 may be smaller than the diameter of the body coupling portion 232. Additionally, the diameter of the support 231 may be manufactured smaller than the diameter of the drum body 210. Accordingly, even if the clothes accommodated in the drum body 210 arbitrarily move to the front of the drum body 210, they can be restricted to the support 231 and prevented from leaving to the outside.

Figure 14 shows the specific structure of the drum front portion 230 of the present invention.

The drum front portion 230 of the present invention may be coupled to the front of the drum body 210 and extended forward of the drum body 210 so that it can be supported by the support wheel 415.

The support wheel 415 may be rotatably disposed lower than the drum body 210 while being fixed to the front case 210.

The support wheel 415 may be provided to support the lower part of the drum front part 230, and may be provided in plural numbers spaced at regular intervals.

Of course, the support wheel 415 may be made of a material such as felt, as long as it can rotatably support the drum front portion 230 without excessively applying frictional force to the drum front portion 230.

The support 231 may be rotatably supported on the support wheel 415 to transmit a portion of the load of the drum body 210 to the support wheel 415.

The support 231 is supported by the support wheel 415 and can rotate together with the drum body 210. As a result, the entire drum 200 can rotate while maintaining its installation height.

Meanwhile, the body coupling portion 232 may be expanded and extended from the support 231, and the peripheral or exposed surface of the body coupling portion 232 is coupled to the front surface of the drum body 210. It can be.

The drum front portion 230 may further include a molded portion 233 between the support 231 and the body coupling portion 232.

The molded portion 233 may be formed to be recessed or convex from the support 231 toward the body coupling portion 232, and distributes the load transmitted to the drum front portion 230 and connects the forefoot. It can play a role in strengthening the rigidity and durability of the part 230.

Meanwhile, the support 231 may be formed so that the support wheel 415 can roll stably when supported by the support wheel 415. That is, since the support wheel 415 moves along the outer peripheral surface of the support 231 based on the support 231, the support 231 has a rail-like structure that guides the movement of the support wheel 415. It is necessary to provide.

However, when the support 231 is molded to seat the support wheel 415, the surface of the support 231 may be uneven along the circumference and the curvature may not be constant.

In addition, during the molding process of the support 231, some parts may be excessively plastically deformed, which may result in uneven strength and durability as a whole.

In addition, one surface or the front surface (exposed surface) of the support 231 is exposed as is with the thickness of the metal plate M, which forms the inner peripheral surface of the inlet. Therefore, in order to prevent clothing from being damaged on one side of the support 231 or the user's body from being injured, it is necessary to blunt one side or the exposed surface of the support 231.

To solve this problem, the drum front part 230 of the present invention is provided so that the exposed surface of the support 231 is rolled outward in the radial direction to prevent the exposed surface of the support 231 from being sharply exposed to the metal plate M itself. It may further include a curling unit 234.

As a result, the support 231 has the curling portion 234 with a larger diameter than the support 231 disposed on the front or exposed side, and the molding portion 234 with a larger diameter than the support 231 on the rear or other side. A portion 233 or a body coupling portion 232 is provided. Accordingly, the support 231 can guide the movement of the support wheel 415 even without a recessed or concave guide rail provided along the circumference.

Even if vibration occurs in the drum 200, the position change of the support wheel 415 may be limited by the curling part 234, the forming part 233, or the body coupling part 232. Accordingly, the drum 200 can be stably supported on the support wheel 415.

As a result, the support 231 is not separately molded or plastically deformed and can maintain the original properties of the metal plate over the entire area.

Figure 15 is a conceptual diagram showing the process of installing the drum front part 230 of the laundry treatment apparatus of the present invention on the drum body 210.

Referring to Figure 15(a), the drum front portion 230 of the present invention may be manufactured from a cylindrical material member 230a (hereinafter referred to as a cylindrical member) like the drum body 210.

The cylindrical member 230a may be provided in a cylindrical shape with a smaller diameter than the drum body 210.

The cylindrical member 230a is not provided as a ring or donut-shaped plate that can shield the front surface of the drum body 210, but is provided in a cylindrical shape that can form a certain receiving space or volume therein. You can.

The cylindrical member 230a may be made of a metal material, and, like the drum body 210, may be manufactured by combining both ends of a rectangular metal plate.

The cylindrical member 230a may be divided into a first end (A) forming the inlet of the drum 200 and a second end (B) coupled to the front of the drum body 210.

The first end (A) and the second end (B) may be divided in the height direction of the cylindrical member (230a), and in the cylindrical member (230a), the second end (B) is the first end. It may be defined as a part closer to the drum body 210 than (A).

Referring to Figure 15(b), the drum front portion 230 can be manufactured by expanding the second end B of the cylindrical member 230a.

Specifically, the diameter of the second stage (B) may be expanded to be equal to or larger than the diameter of the drum body 210.

For example, in the cylindrical member 230a, the second end (B) is pressed into a mold through a press method and the diameter of the second end (B) is enlarged more than the diameter of the first end (A). You can. As a result, the second stage (B) can be manufactured with a body coupling portion 232 coupled to the drum body 210.

On the other hand, if the diameter of the cylindrical member 230a is manufactured from the beginning to correspond to the diameter of the support 231, the first stage A can be arranged to maintain its diameter without the need for further expansion or axialization. . In other words, the first end (A) can maintain the initial state of the cylindrical member 230a without being separately molded or plastically deformed, except that the front exposed surface or the peripheral surface is molded.

As a result, the support 231 of the present invention can prevent production tolerances such as a surface texture of a specific area being differently deformed, a different curvature, a different shape, or more plastic deformation than another area. Therefore, the material properties and physical properties of the support 231 of the drum front part 230 of the present invention are maintained uniformly, so the reliability of the support 231 can be guaranteed, and the support force on the support wheel 451 is stable. It can be maintained.

In addition, the second end (A) of the cylindrical member (230a) made of metal plate (M) is plastically deformed to produce the body coupling portion (232).

When the metal plate (M) is plastically deformed, its rigidity or strength generally increases. Therefore, in the drum manufacturing method of the present invention, the body coupling portion 232 is plastically deformed and expanded at the drum front portion 230, so the rigidity or strength of the body coupling portion 232 can be stronger than that of the initial metal material. .

Since the rigidity or strength of the body coupling portion 232 coupled to the drum body 210 is strengthened, the coupling force between the drum front portion 230 and the drum body 210 can be strengthened, and the drum front portion ( The ability of 230) to maintain the shape of the drum body 210 can also be strengthened.

As a result, the clothing processing device of the present invention can sufficiently rotate the drum body 210 at a high RPM that generates an acceleration of 1G or more, which causes the clothing to stick to the inner wall of the drum and rotate.

Additionally, the laundry treatment apparatus of the present invention can allow for the generation of significant inertial force by changing the rotation direction of the drum body 210.

As a result, the drum manufacturing method of the present invention can be applied to manufacturing a clothing treatment device that can change the rotation direction of the drum 200 or rotate at high speed.

Figure 16 shows an embodiment in which the drum manufacturing method of the present invention is applied to a clothing treatment device.

Hereinafter, the method of manufacturing the drum of the present invention will be described based on its application to a clothing treatment device that directly rotates the drum 200 described above with a reducer and a motor. The method of manufacturing the drum of the present invention uses a drum body 210. This does not exclude its application to clothing processing devices rotated by belts, pulleys, and motors.

Referring to FIG. 16(a), the drum 200 is disposed ahead of the rear plate 400, and the driving unit that rotates the drum 200 is positioned at a height facing the back of the drum 200. It may be placed rearward than the rear plate 420.

The reducer 600 may be coupled to the rear of the rear plate 400 and coupled to the drum rear surface 220 coupled to the drum body 210.

Among the motors 500, the stator 510 is coupled to the rear of the reducer 600 and is disposed rear of the rear plate 420 to rotate the rotor 520.

The drum 200 is coupled to the reducer 600 and supported ahead of the support plate 400. As a result, the drum 200 can be arranged like a cantilever with the rear fixed and the front freely moving. Accordingly, in the laundry treatment apparatus of the present invention, it may be more important that the installation height is maintained while the front of the drum 200 is rotatably supported compared to the rear of the drum 200.

Referring to Figure 16(b), the laundry treatment apparatus of the present invention can rotatably support the front lower part of the drum 200 with a support wheel 415.

The support wheel 415 may be fixed to the front plate 410 and rotated, and may be placed lower than the drum body 210.

By seating the drum front portion 230 on the support wheel 415, the installation height of the entire front of the drum 200 can be maintained.

The support 231 of the drum front part 230 may be seated on the support wheel 415, and when the drum body 210 rotates, the outer peripheral surface of the support 231 is attached to the support wheel 415. It can be supported and rotated.

Since the area of the support 231 supported by the support wheel 415 is not plastically deformed, its shape can be maintained as is. Accordingly, the support 231 can be supported on the support wheel 415 with minimal vibration or change in position when the drum body 210 rotates.

The body coupling portion 232 that extends from the support 231 and is coupled to the front of the drum body 210 is plastically deformed and has stronger rigidity and strength than the support 231. Accordingly, the body coupling portion 232 can be more firmly coupled to the drum body 210. In addition, even when clothing is accommodated and rotated inside the drum body 210, the body coupling portion 232 can remain stably coupled to the drum body 210.

In addition, in the laundry treatment device of the present invention, as the rigidity and strength of the body coupling portion 232 are strengthened, the drum body 210 can be rotated by changing the rotation direction, and the drum body 210 can be rotated at high speed. You can do it.

In this process, even if a significant load, external force, or vibration is transmitted to the body coupling portion 232, the body coupling portion 232 can maintain its shape and installation position as much as possible.

As a result, the support 231 extending from the body coupling portion 232 can be stably supported and rotated by the support wheel 415 even if its rigidity or strength is not stronger than that of the body coupling portion 232.

Figures 17 to 21 show the manufacturing process of the drum front portion 230.

Referring to Figure 17, the manufacturing method (S) of the drum of the present invention includes a body manufacturing step (S1) of manufacturing the drum body 210, a front manufacturing step (S2) of manufacturing the drum front portion 230, and a drum manufacturing step (S2) of manufacturing the drum body 210. It may include a rear manufacturing step (S3) of manufacturing the rear surface 220, and a joining step (S4) of coupling the drum front part 230 and the drum rear surface 220 to the drum body 210.

The body manufacturing step (S1) includes cutting a metal plate whose width corresponds to the length in the front-back direction of the drum body 210 in a rectangular shape, and then joining both ends of the metal plate to produce the drum body 210. can do.

Referring to Figure 18, the front manufacturing step (S2) includes a blanking (S21) step of cutting the metal plate (M), which is the material of the drum front part 230, into a rectangular shape, and cutting the cut metal plate (M) into a cylindrical shape. It may include a manufacturing step (S22) including a welding process of upward welding, and an expansion step (S23) of expanding one side of the welded cylindrical member 230a to be coupled to the drum body 210.

Figure 19 shows an example of the blanking step.

The front manufacturing step (S2) may include a blanking step (S21) of cutting a metal plate (M) whose width is much smaller than the metal plate for manufacturing the drum body 210 into a rectangular shape.

The blanking step (S21) may include securing a length corresponding to the front circumference of the drum body 210 in the metal plate (M) and then cutting the metal plate (M).

The width of the metal plate M used in the blanking step (S21) may be much smaller than the front diameter of the drum body 210. As a result, a small metal plate M can be used to manufacture the drum front portion 230, thereby reducing material costs.

The blanking step (S21) may include placing a metal plate (M) rolled into a roll shape on a rotating machine (81) and inserting the free end of the metal plate (M) into a guide machine or extrusion machine (82). You can.

When the rotating machine 81 rotates the metal plate M, the free end of the metal plate M can pass through the guide machine 82 and enter the mold machine 83 that performs the blanking process or cutting process. can be inserted.

The mold machine 83 may be equipped to cut the metal plate M whenever the length of the metal plate M reaches the length required for manufacturing the drum front portion 230.

The length at which the metal plate M is cut may correspond to a length corresponding to the circumference of the drum body 210.

The cut metal plates (M) can be stacked in plural pieces and moved to the stage of manufacturing a large amount of the drum front portion 230.

Figure 20 shows one embodiment of the above manufacturing steps.

The front manufacturing step (S2) further includes a manufacturing step (S22) of connecting or combining both ends of the metal plate (M) and forming it into a cylindrical shape to form a cylindrical member (230a) that becomes the base of the drum front portion (230). It can be included.

In the manufacturing step (S22), the metal plate M provided in a plate shape may be manufactured as a cylindrical member 230a.

In the manufacturing step (S22), the metal plate (M) can be manufactured as a cylindrical member (230a) with a diameter smaller than that of the drum body (210).

The manufacturing step (SS2) involves using a rolling machine 84 to bend the metal plate M into a cylindrical shape, a welder 85a to weld both ends of the curved metal plate M, and checking whether the welding was performed normally. It can be performed in a welding room 85 equipped with a welding inspection device 85b.

The manufacturing step (S22) may include a rolling step (S221) in which both ends of the metal plate (M) cut through the blanking process are bent to face each other.

The rolling step (S221) can be viewed as a step of forming the metal plate (M) into a cylindrical member (230a) corresponding to the diameter of the support (221) through a rolling process in the rolling machine (84).

The diameter of the cylindrical member 230a manufactured in the rolling step (S221) may be set to a diameter corresponding to the inlet 211 of the drum 200.

Meanwhile, the manufacturing step (S22) may further include a welding step (S222) of welding both ends of the metal plate (M) bent into a cylindrical shape.

Through the welding step (S222), both ends of the metal plate (M) can be firmly fixed and coupled using the welder (85a) and a welding metal member.

Both ends of the metal plate M may be welded while facing each other. As a result, the overall thickness of the drum front portion 230 can be manufactured to be uniform.

Additionally, both ends of the metal plate M may be welded in a partially overlapping state. As a result, fixing force for the welded portion may be secured.

As a result, through the welding step (S222), the metal plate (M) can be manufactured into a cylindrical member (230a), and the welding line (L) in the cylindrical member (230a) is formed at a point facing the metal plate (M). It can correspond to the arrangement direction of both ends.

The weld line (L) may be set to be parallel to the height direction of the cylindrical shape or the thickness direction of the drum front portion 230 so as not to be damaged or spread during the subsequent forming process.

That is, the cylindrical member 230a can be manufactured by joining both ends of a rectangular metal plate by welding, etc., and the welding line L of the cylindrical member 230a can be formed along the width direction of the metal plate. there is.

The welding line (L) may be formed in the height direction rather than in the radial direction based on the cylindrical member (230a), and when coupled to the drum body (210), the welding line (L) is formed in the drum ( 200) can be formed along the front-back direction.

Of course, the welding line (L) may be formed to be inclined up and down based on the front-to-back direction of the drum 200.

On the other hand, through the blanking step (S21) and the manufacturing step (S22), the drum front 230 can be formed directly by expanding the cylindrical member 230a as is or by molding the circumference. During this process, the process itself in which the metal plate M is scraped and discarded can be omitted or minimized.

In other words, in order to form the cylindrical member 230a, there is no need to remove the areas corresponding to the inside and outside of the cylindrical member 230a, and only need to connect both ends of the metal plate to each other, so the material of the metal plate M Utilization rate can be greatly improved.

For example, in the front manufacturing step (S2) of the present invention, the material utilization rate of the metal plate (M) can be secured at 80% or more.

In addition, by manufacturing the cylindrical member 230a using a metal plate M with a width much smaller than the diameter of the drum body 210, the small metal plate M can be actively utilized.

That is, the weight and size of the metal plate M itself can be minimized, and thus the manufacturing cost of the drum front part 230 can be greatly reduced.

Figure 21 shows an example of the tube expansion step (S23).

The front manufacturing step (S2) of the present invention may include an expansion step (S23) of expanding a portion of the cylindrical member (230a) to the diameter of the drum body (210).

The expansion step (S23) may include expanding the diameter of one surface of the cylindrical member 230a while pressing the cylindrical member 230a through a press mold or the like.

One surface of the cylindrical member 230a may correspond to one end surface or a corner circumferential surface rather than a side surface of the cylindrical member 230a, and the other surface of the cylindrical member 230a may correspond to the other end surface or an edge circumferential surface facing the one surface. It may correspond to the side.

The side surface of the cylindrical member 230a may be disposed between the one surface and the other surface.

The expansion step (S23) may include a pressing step (S232) in which one side of the cylindrical member 230a is pressed by a press mold to expand the diameter based on the other side.

In the pressing step (S232), the free end area of the press mold may be slightly smaller than the diameter of the cylindrical member 230a, and the fixed end area of the press mold may be larger than the diameter of the cylindrical member 230a. It can be provided.

Accordingly, when one side of the cylindrical member 230a is pressed with the press mold, one side of the cylindrical member 230a may be bent outward and expanded.

The pressing step (S232) can be completed by pressing one surface of the cylindrical member 230a once. For example, in the pressing step (S232), one side of the cylindrical member 230a may be pressed once with a press mold so that it is inclined at least 90 degrees with respect to the other side and expanded. However, if one surface of the cylindrical member 230a is pressurized at once and the strain rate is plastically deformed beyond the reference value, there is a risk that the weld line L, etc. may burst or be damaged.

Accordingly, the pressing step (S232) may include pressing one surface of the cylindrical member 230a multiple times, such as pressing once and then pressing twice more.

For example, the pressing step (S232) may include a first pressing step (S232a) of first pressing one surface of the cylindrical member 230a and a second pressing step (S232b) of secondary pressing the one surface. there is.

In the expansion step (S23), the expansion step (S23) is a centering step (S231) of aligning the zero point of the mold member and the cylindrical member (230a) so that one side of the cylindrical member (230a) can be expanded evenly along the circumference. ) may further be included.

As a result, the expansion step (S23) may include a centering step (S231) and a pressing step (S232) of pressing one surface of the cylindrical member 230a.

Meanwhile, the pressing step (S232) may include pressing and forming one surface of the plurality of circular members 230a at the same time using a press mold.

Additionally, the pressing step (S232) may include pressuring and forming one surface of one circular member 230a step by step using a press mold.

When pressing one surface of a plurality of circular members 230a in the pressing step (S232), the pressing pressure of the press mold may be set to be greater than when pressing one circular member 230a.

For example, when the plurality of circular members 230a are pressed and molded at the same time, they can be pressed with a load of 1,200 tons, and when one circular member 230a is pressed and molded, they can be pressed with a load of 500 tons, 300 tons, and 250 tons. It can be subdivided and pressed with a load such as.

Hereinafter, the pressing step (S232) will be described based on the fact that one circular member 230a is pressed and molded in a press mold step by step. However, the plurality of circular members 230a may be pressed into one press mold and formed in stages.

The pressing step (S232) may include a first pressing step (S232a) of placing and pressing the cylindrical member (230a) in the first press mold (I).

In the first pressing step (S232a), one surface of the cylindrical member 230a may be bent outward by less than 90 degrees with respect to the other surface. For example, one side may be bent 60 degrees relative to the other side.

The pressing step (S232) may include a second pressing step (S232b) of placing and pressing the cylindrical member (230a) in the second press mold (II).

In the second pressing step (S232), one side of the cylindrical member 230a may be bent outward at an angle of 90 degrees or more with respect to the other side. For example, one side may be bent 90 degrees relative to the other side.

The load or pressure with which the cylindrical member 230a is pressed in the second pressing step (S232b) may be set differently from the load or pressure with which the cylindrical member 230a is pressed in the first pressing step (S232a).

For example, in the first pressurizing step (S232a), the cylindrical member 230a is pressurized with a load of 500 tons, and in the second pressurizing step (S232b), the cylindrical member 230a is pressurized with a load of 300 tons. It can be.

The first press mold may be set to press the cylindrical member 230a more strongly than the second press mold.

As a result, the cylindrical member 230 is prevented from being rapidly plastically deformed, thereby preventing damage to the welding line L, etc.

The first pressing step (S232a) and the second pressing step (S232b) can be viewed as steps of forming a region of the cylindrical member 230a corresponding to the body coupling portion 231.

One side of the cylindrical member 230a is expanded to form the body coupling portion 232, and the other side of the cylindrical member 230a may be provided with a support 231 up to the area where the expansion begins.

The pressing step (S232) may include a forming step (S232c) of forming a reinforcing portion 233 between the support 231 and the body coupling portion 232.

The reinforcement portion 233 protrudes toward the area where the drum body 210 is disposed between the support 231 and the body coupling portion 232, or is recessed toward the outside of the drum front portion 230. It can be provided in the form

The reinforcement portion 233 is formed along the circumference of the drum front portion 230 between the support 231 and the body coupling portion 232 to transfer the load applied to the drum front portion 230 in various directions. By dispersing, the durability of the drum front part 230 can be strengthened.

The forming step may also be performed by pressing with a press mold.

That is, the forming step (S232c) may include pressing the inner surface of the cylindrical member 230a in the third press mold (III). The forming step (S232c) may be performed by pressing the area between the support 231 and the body coupling portion 232 of the cylindrical member 230a with a press mold.

In the forming step, the third press mold (III) may be used, and the pressing force may be equivalent to 250 tons.

The reinforcement portion 233 includes a protrusion 233a that protrudes convexly outward from the body coupling portion 232 and extends from the protrusion 233a to correspond between the body coupling portion 232 and the support 231. It may include a recessed portion 233b whose inner surface is recessed.

Meanwhile, the pressing step (S232) may include a trimming step (S232d) of cutting the free end or the outermost peripheral surface of the body coupling portion 232. The trimming step may correspond to a process of cutting unnecessary portions of the outermost peripheral surface of the body coupling portion 232 to be coupled to the drum body 210.

The trimming step may be performed using a separate cutting tool. However, in the manufacturing step (S) of the present invention, the trimming step may also be performed by pressing and cutting the outermost peripheral surface or free end of the cylindrical member 230a with the press mold.

In the trimming step, the fourth press mold (IV) may be used, and the pressing force may be equivalent to 250 tons.

The trimming step may correspond to a step in which a portion of the cylindrical member 230a is completely scraped and separated.

The pressing step (S232) may include a curling step (S232e) of curling around one side and the other side of the cylindrical member (230a).

The curling step (S232e) includes a first curling step (E1) of curling the other side of the cylindrical member 230a or the free end of the support 231 to the outside, and one side of the cylindrical member 230a or the body combination. It may include a second curling step (E2) in which the free end of the portion 232 is rolled outward.

The first curling step (E1) may require a greater degree of forming the cylindrical member 230a than the second curling step (E2). That is, the first curling step (E1) may involve a greater amount of winding of the metal plate than the second curling step (E2).

For example, the first curling step (E1) may be a step of winding the free end or exposed peripheral surface of the support 231 into a ring shape with a circular cross-section, and the second curling step (E2) may be a step of wrapping the free end or exposed peripheral surface of the support 231 in a ring shape. This may correspond to the step of winding the free end or exposed peripheral surface of the body coupling portion 232 just to the extent of facing the outer peripheral surface of the drum body 210.

The first curling step (E1) is a step of forming a curling portion 2311 that strengthens the durability of the support 231 and prevents the support wheel 451 from coming off, and the second curling step (E2) ) can be viewed as a step of forming the bent portion 2321 where the body coupling portion 232 is coupled to the drum body 210.

The curling step (S232e) may be performed as a rolling process.

However, the curling step (S232e) may also be performed while both sides of the cylindrical member 230a are pressed with a press mold.

In the curling step (S232e), the fifth press mold (V) can be used, and the pressing force can be equivalent to 250 tons.

As a result, the pressurizing tube step (S232) is a step of forming the cylindrical member 230a into the drum front portion 230, and can mostly be performed using a press mold.

Of course, the pressing step (S232) may be performed by repeatedly using one press mold.

In the pressing step (S232), the pressing step of expanding the diameter may be performed with a heavy load, and the other steps of modifying the shape of the cylindrical member 230a may be performed with a light load.

Referring to Figure 22(a), the conventional clothing processing device manufactures the drum front portion 2 by drawing or spinning.

In a conventional clothing processing device, the support 21 is formed in the drum front portion 2 by pushing the inside of a metal plate by pressing it with a roller or the like. At this time, not only the support 21 but also the body coupling part 23 and the forming part 22 can be formed by a spinning or drawing method using a roller or the like.

Therefore, in the conventional clothing processing apparatus, the roller moves along the circumferential direction of the inner peripheral surface of the drum front part 2 and forms the support 21, the forming part 22, and the body coupling part 23. A scratch (T) is formed along the circumference of the drum front portion (2) of the clothing processing device.

The scratch T is generated when the roller presses the surface of the drum front part 2.

The scratches T may be formed along the circumference of the drum front portion 2, and may be formed in plural numbers along the circumference of the drum front portion 2.

In addition, in the conventional method of manufacturing a drum of a clothing treatment device, the support 21 and the molded portion 22 are formed by pushing the inside of a metal plate with a roller or the like, so that scratches formed on the support 21 and the molded portion 22 ( The number, depth, and density of scratches (T) may be greater than the number, depth, and density of scratches (T) formed on the body coupling portion 23.

Referring to Figure 22(b), the laundry treatment device of the present invention forms at least one of the molding portion 233 and the body coupling portion 232 by pressing one surface of the cylindrical member 230a with a press mold or the like. do.

In other words, the press mold presses one surface of the cylindrical member 230a in the thickness direction of the cylindrical member 230a or the front and rear direction of the drum front portion 230, forming the forming portion 233 or the body coupling portion. (232) is molded.

Accordingly, in the laundry treatment apparatus of the present invention, a scratch (G) may be formed in the thickness direction of the drum front portion 230 or in the front-back direction based on the drum front portion 230 being coupled to the drum body 210. there is.

The scratch (G) is generated due to friction when the mold pressing the cylindrical member 230a presses one surface of the cylindrical member 230a.

The scratches G may be formed along the thickness direction of the drum front portion 230, and may be formed in plural numbers along the circumference of the thickness of the drum front portion 230.

Since the support 231 maintains the original shape of the cylindrical member 230a, scratches G formed by the press mold may not be formed on the support 231.

In addition, even if a scratch (G) is formed on the support 231, the drum manufacturing method of the present invention presses one surface of the cylindrical member 230a with a press mold to form the body coupling portion 232 or the forming portion 233. Since forming, the number, depth, and density of scratches (G) formed on the body coupling portion 232 or molding portion 233 are greater than the number, depth, and density of scratches (G) formed on the support 231. can be formed.

In addition, even if the drum front portion 230 manufactured by the manufacturing method of the present invention is provided with a scratch (T) along the circumference, a scratch (G) formed in the thickness direction or front-back direction may necessarily be present.

The drum front portion 230 produced by the manufacturing method of the present invention has a greater number, depth, and density of scratches (G) formed in the thickness direction or front-to-back direction than the number, depth, and density of scratches (T) along the circumference. You can.

Figure 23 shows an embodiment of performing the welding step of the present invention.

The welding step (S222) performed in the front manufacturing step (S2) of the present invention may be performed with both ends of the metal plate (M) arranged to overlap or face each other.

In the welding step (S222), welding is performed using a welder (85a) capable of heating a separate metal member at a portion where both ends of the metal plate (M) face each other. The welder 85a performs welding by temporarily melting the metal member using a laser method or a high voltage method and then hardening it.

At this time, as the molten metal member thermally contracts in the process of cooling in the metal plate M, both ends of the molten metal member contract inward. As a result, when welding is completed, at least one of both ends of the metal plate M has a defective welding portion as shown in the figure.

Since stress is concentrated in the defective welded portion, it may be easily damaged when a pressing force is applied when manufacturing the drum front portion 230.

Figure 24 shows a further embodiment of carrying out the welding steps of the present invention.

The welding step (S222) may be performed by additionally placing a metal block (C) on at least one of both sides of the portion where both ends of the metal plate (M) face each other.

The metal blocks (C) may be placed at the start and end portions of the metal plate (M), respectively, and may be placed on both sides where both ends of the metal plate (M) face each other.

The metal block (C) can absorb the heat of the molten metal member. Therefore, among the molten metal members, the metal member facing the metal block (C) can be cooled quickly and hardened while maintaining its shape in contact with the metal block (C).

As a result, even if the entire metal member is cooled and hardened, welding defects such as depressed grooves at both ends of the metal plate M may not be formed.

The metal block (C) may be made of a metal material with high thermal conductivity, such as copper.

Since the portion of the metal plate M welded to both ends is provided in a uniform form like the other portions, it can be prevented from being broken or spread even if it is later pressed into a press mold or the like.

Meanwhile, when performing welding, the welder 85a may be arranged vertically with respect to the surface of the metal plate M or may be arranged inclinedly with respect to the welding direction.

That is, the welder 85a can weld the metal plate M while being tilted by an angle E toward the direction in which the metal plate M moves. For example, the angle E can be set from 5 degrees to 10 degrees.

As a result, the movement amount of the molten metal member is limited and hardened while flowing along the moving direction of the welder 85a, and as a result, both ends of the metal plate M can be uniformly welded.

Figure 25 shows the process of the pressurizing step in detail.

The body coupling portion 232 of the drum front portion 230 is manufactured by bending outward at 90 degrees or more than 90 degrees from the support 231.

At this time, if the support 231 is pressed at an angle of 90 degrees or more at a time to form the body coupling portion 232, damage such as tearing of the cylindrical member 230a may occur.

In particular, because the weld line L in the cylindrical member 230a is most vulnerable to external force or stress may be concentrated, damage such as separation or tearing of the weld line L or adjacent parts may occur. You can.

Therefore, in the drum manufacturing method of the present invention, the expansion step (S23) can expand one side of the cylindrical member 230a at a certain angle when manufacturing the body coupling portion 232.

For example, the present invention tube expansion step (S23) includes a first pressurizing step (S232a) of expanding the tube by pressing one side of the cylindrical member (230a), and a second pressurizing step (S232b) of expanding the tube by further pressing the one side. ) can be performed.

As a result, the welding line (L) can be prevented from being damaged or separated.

Figure 25(a) is an enlarged view of the state of metal particles near the welding line (L) when the first pressurizing step (S232a) is performed.

When one surface of the cylindrical member 230a is bent outward and expanded in the first pressurizing step (S232a), the welding line (L) can maintain the state of joining both ends of the metal plate (M).

Of course, the weld line (L) may be formed thicker than the particles of the metal plate (M) because recrystallization occurs during the process of melting and cooling the metal. However, even if the first pressing step (S232a) is performed, the combined state can be maintained.

Figure 25(b) is an enlarged view of the state of metal particles near the welding line (L) when the second pressurizing step (S232b) is performed.

When one surface of the cylindrical member 230a is further bent outward and expanded in the second pressing step 232b, the welding line L can still maintain the state of joining both ends of the metal plate M. .

Furthermore, it can be seen that the metal member corresponding to the weld line (L) is completely plastically deformed and the particles become more dense. Accordingly, the metal member corresponding to the weld line (L) may become more similar to the particle size of the nearby metal plate (M). As a result, the overall uniformity of the cylindrical member 230a forming the drum front portion 230 can be further strengthened, and the possibility of being broken or damaged during the subsequent molding process can be significantly reduced.

Figure 26 shows a structure in which rigidity is strengthened due to the pressurization step.

Since the drum manufacturing method of the present invention manufactures the drum front portion 230 through a welding process, there is a need to ensure the rigidity, strength, and durability of the weld line (L).

In addition, when the drum 200 of the present invention is supported by combining a driving part at the rear, the drum front part 230 needs to support a significant portion of the drum load.

Therefore, the drum front part 230 of the present invention needs to ensure the rigidity or durability of the entire area including the weld line (L), and prevent the weld line (L) from being damaged or separated even when the mold, etc. are pressed. There is a need to become

Figure 26(a) shows the change in hardness of the drum front portion 230 when the first pressurizing step (S232a) is performed, centered on the welding line (L) and the nearby area. The hardness unit in the above graph is based on Vickers Hardness, and HV0.5 means pressing with a force of 0.5kg.

It can be understood that the stronger the hardness, the stronger the strength and rigidity.

When the drum front portion 230 is arranged in the form of a cylindrical member 230a, the drum front portion 230 exhibits uniform hardness not in the circumferential direction but in the thickness direction or front-to-back direction.

However, when the first pressing step (S232a) is performed and the cylindrical member 230a is pressed, external force may be transmitted to the entire cylindrical member 230a. At this time, the degree of plastic deformation of the cylindrical member 230a becomes stronger in the order closest to the press mold, so the hardness can be strengthened.

In other words, from the basic hardness of the metal plate (M), the hardness can be strengthened in the order of the body coupling portion 232, the forming portion 233, and the support 231. For example, the basic hardness of the metal plate (M) may be set between 150 and 155HV0.5. In addition, as the metal plate (M) goes through the first pressing step (S232a), the hardness of the body coupling portion 232 is about 180 HV0.5, the hardness of the molded portion 233 is 160 HV0.5, and the support 231 )'s hardness can be measured as 155HV0.5.

Meanwhile, the hardness of the weld line L in the cylindrical member 230a is set to be stronger because it is thermally deformed in the process of joining adjacent metal plates M. Specifically, it can be seen that the hardness of the weld line (L) exceeds 200 (Hv0.5), and the hardness of the adjacent metal plate (M) is less than 200 (Hv0.5). This shows that when the weld line (L) is pressurized with a press mold or the like and plastically deformed, the size of the particles becomes more dense, and thus the hardness and strength increase.

The weld line (L) is set to have a stronger hardness than the metal plate (M) in the entire thickness direction. In addition, among the welding lines (L), the hardness may be strengthened in the order of the body coupling portion 232, the forming portion 233, and the support 231. For example, at the welding line (L), the hardness of the body coupling portion 232 is measured to be about 210 HV0.5, the hardness of the molded portion 233 is measured to be 175 HV0.5, and the hardness of the support 231 is measured to be 170 HV0.5. It can be.

As a result, the hardness of the drum front portion 230 becomes stronger and can sufficiently actively support the load of the drum body 210. Therefore, even if the rear of the drum body 210 is not supported by the rear plate 420, not only the front load of the drum body 210 but also the entire load can be stably supported by the drum front portion 230 alone. .

In addition, since the hardness of the weld line (L) is stronger than that of other parts, even if the drum front part 230 is severely molded during the manufacturing process or is coupled to the drum body 210 and rotated with a strong load, the weld line (L) L) durability can be guaranteed.

Figure 26(b) shows the change in hardness of the drum front portion 230 when the second pressurizing step (S232b) is performed, centered on the welding line (L) and the nearby area. When the second pressing step (S232b) is performed, it can be seen that the hardness or rigidity of the welding line (L) in the drum front portion (230) is further strengthened compared to the adjacent area (M).

Specifically, when the second pressing step (S232b) is performed to pressurize the cylindrical member 230a, external force may be additionally transmitted to the entire cylindrical member 230a. At this time, the degree to which plastic deformation occurs in the cylindrical member 230a in the order closest to the press mold becomes stronger, so the hardness can be further strengthened.

However, in the case of the metal plate (M) region, the phenomenon of hardness strengthening may not be noticeable because it has already been sufficiently plastically deformed in the first pressurizing step (S232a). However, the hardness of the body coupling portion 232, the forming portion 233, and the support 231 may be made uniform through the second pressing step (s232b).

That is, as the hardness difference between the body coupling portion 232, the forming portion 233, and the support 231 is narrowed, the overall hardness difference of the drum front portion 230 may not be large. Accordingly, the load applied to the drum front part 230 is evenly distributed, and any one of the body coupling part 232, the forming part 233, and the support 231 is deformed excessively or the stress is more than the others. Concentration can be prevented.

As a result, even if the drum 200 receives driving force through the rear surface and transfers the load to the drum front portion 230, the drum front portion 230 can stably support the load of the drum 200. .

Meanwhile, as the welding line (L) goes through the second pressurizing step (S232b), the particle size may become smaller and more dense. Accordingly, the overall hardness of the weld line (L) can be further increased.

For example, at the welding line (L), the hardness of the body coupling portion 232 is about 220 HV0.5, the average hardness of the molded portion 233 is 190 HV0.5, and the hardness of the support 231 is 170 HV0.5. It can be measured as

Since the hardness of the weld line (L) becomes stronger than that of other parts, even if the drum front part 230 is severely molded during the manufacturing process or is coupled to the drum body 210 and rotated with a strong load, the weld line (L) The durability of can be further strengthened.

Therefore, even if stress is concentrated in the weld line (L), bursting or damage to the weld line (L) can be fundamentally prevented. Accordingly, the drum 200 may be allowed to rotate at high speed or the rotation direction of the drum may be changed at any time.

Accordingly, the laundry treatment apparatus of the present invention can be used to rotate the drum 200 directly from the back using a driving unit.

The present invention can be modified and implemented in various forms, and its scope is not limited to the above-described embodiments. Therefore, if the modified embodiment includes elements of the claims of the present invention, it should be considered to fall within the scope of the present invention.

Claims

cabinet;

a drum accommodated inside the cabinet to accommodate clothing;

a front plate disposed between the cabinet and the front of the drum;

It includes a support wheel coupled to the front plate to support the drum,

The drum is

A drum body that accommodates the clothing,

It includes a drum front portion coupled to the front of the drum body to form an inlet through which the clothing is taken in and out,

A clothing treatment device, characterized in that the drum front portion is provided with a weld line formed by welding a metal plate.
According to paragraph 1,

The clothing processing device is characterized in that the weld line is disposed along a thickness direction or a front-back direction of the front portion of the drum.
According to paragraph 1,

The front part of the drum

A support that forms the inlet and is supported on the support wheel,

A body coupling portion extending from the support to a larger diameter and coupled to the drum body,

The weld line is

A clothing treatment device, characterized in that it is arranged to extend from the support unit toward the body coupling part.
According to paragraph 3,

A support plate disposed rearward of the drum,

It further includes a driving part coupled to the support plate to rotate the drum,

The driving unit is coupled to the back of the drum and is provided to rotate the drum,

The support is

A clothing processing device characterized in that it is provided to transmit the load of the drum to the support wheel.
According to paragraph 4,

A clothing treatment device, characterized in that the rigidity of the weld line provided on the support is set to be greater than the rigidity of other areas.
According to paragraph 4,

A clothing treatment device, characterized in that the rigidity of the body coupling portion is set to be greater than the rigidity of the support.
cabinet;

a drum accommodated inside the cabinet to accommodate clothing;

a front plate disposed between the cabinet and the front of the drum;

It includes a support wheel coupled to the front plate to support the drum,

The drum is

A drum body that accommodates the clothing,

It includes a drum front portion coupled to the front of the drum body to form an inlet through which the clothing is taken in and out,

A clothing treatment device, characterized in that scratches are formed on the front part of the drum in the front-back direction or the thickness direction.
In clause 7,

The front part of the drum

Prevents scratches from forming in the radial or circumferential direction, or

A clothing treatment device characterized in that it is provided with more scratches formed in the front-back direction or thickness direction than scratches in the diametric direction.
In clause 7,

The front part of the drum

A support that forms the inlet and is supported on the support wheel,

A body coupling portion extending from the support to a larger diameter and coupled to the drum body,

A clothing treatment device, wherein the scratches are formed in the body coupling portion in a front-back direction or a thickness direction.
According to clause 9,

The front part of the drum

than scratches provided on the support.

A clothing treatment device, characterized in that the number of scratches provided in the body coupling portion is increased.
According to clause 9,

The front part of the drum

Further comprising a molded portion bent and extending from the support toward the body coupling portion,

The clothing treatment device is characterized in that the scratches are formed in the molding part in the front-back direction or the thickness direction.
According to clause 11,

The front part of the drum

than scratches provided on the support.

A clothing treatment device, characterized in that the number of scratches provided in the molding unit is increased.
In clause 7,

A clothing treatment device, characterized in that the drum front portion is provided with a weld line formed by welding a metal plate.
According to clause 13,

The front part of the drum

A support that forms the inlet and is supported on the support wheel,

A body coupling portion extending from the support to a larger diameter and coupled to the drum body,

The clothing processing device is characterized in that the welding line extends from the support to the body coupling portion.