CN118215760A - Clothes treating apparatus - Google Patents

Abstract

The present application relates to a laundry treatment apparatus, comprising: a drum having a drum body in a cylindrical shape with two opposite sides open, a front cover provided to close one open side of the drum body and form a front face of the drum body, a rear cover provided to close the other open side of the drum body and form a rear face of the drum body, and a drum inlet penetrating the front cover and communicating with the inside of the drum body; a fixing plate provided at a position spaced apart from the rear cover; a power transmission unit having a housing fixed to the fixed plate, an input shaft having one end located outside the housing and the other end located inside the housing, an output shaft penetrating the fixed plate and having one end fixed to the rear cover and the other end located inside the housing, and a gear unit located inside the housing and transmitting rotational movement of the input shaft to the output shaft; and a motor having a stator fixed to the fixed plate or the housing and forming a rotating magnetic field, and a rotor fixed to one end of the input shaft and rotated by the rotating magnetic field, wherein the drum body, the rear cover, and the front cover are formed of the same material, and the thickness of the drum body is set to be thinner than the thickness of the rear cover and the thickness of the front cover.

Description

Clothes treating apparatus

Technical Field

The present application relates to a laundry treatment apparatus.

Background

A laundry treatment apparatus is a generic term for a washing machine that washes laundry (laundry or drying object), a dryer that dries laundry, and an apparatus that can perform both washing and drying of laundry.

In general, a washing machine is provided to include: an outer tub storing water; a washing drum disposed inside the outer tub and storing laundry; and a driving part (washing driving part) for rotating the washing drum, wherein the dryer comprises: a drying drum storing laundry; a driving part (drying driving part) for rotating the drying roller; and a heat exchanging part for removing moisture from laundry by supplying air to the drying drum.

In general, the washing driving part includes: a stator fixed to the outer tub and forming a rotating magnetic field; a rotor rotated by a rotating magnetic field; and a rotating shaft penetrating the outer tub and connecting the washing drum and the rotor; and the drying driving part includes: a motor; a pulley fixed to a rotation shaft of the motor; and a driving belt (power transmission part) for connecting the rotary motion of the pulley and the drying roller.

The washing driving part is set in the motor rotating shaft to connect the washing drum and the rotor. For washing or dehydrating laundry, the washing driving part needs to control the rotation speed of the washing drum to be high or change the rotation direction of the washing drum, and if the rotation shaft of the motor is directly connected to the washing drum and the rotor, there is an effect that the rotation speed and the rotation direction of the washing drum can be easily controlled.

On the other hand, the conventional drying driving part generally adopts a structure in which a power transmission part such as a transmission belt is connected with a drying drum and a rotation shaft of a motor. This is because, in the dryer, the necessity of maintaining the rotation speed of the drying drum at a high level or the necessity of changing the rotation direction of the drying drum is low, and therefore, the drying drum may be rotated by the power transmission portion such as a belt. However, if the rotation speed and the rotation direction of the drying drum can be changed, the movement of laundry in the inside of the drying drum can be controlled, and thus shortening of the drying time and improvement of the drying performance of the dryer can be expected.

There is a conventional dryer having a drying driving part (korean laid-open publication No. 10-2020-0065931) in which a rotor and a drying drum are connected by a decelerator (power transmission part). The drying driving part is arranged to be coaxial with an input shaft connected with the rotor and an output shaft connected with the drying roller, so that shortening of drying time or improvement of drying performance can be expected.

The above dryer may not only control the rotation speed of the drying drum in various ways, but also change the rotation direction, so there is a possibility that the durability of the drying drum fixing the rotation shaft, the durability of the plate supporting the drying drum may be reduced.

In addition, the dryer of the above-described structure is a structure in which vibration of the drum is transmitted to the decelerator and the fixing plate for fixing the decelerator, and thus there is a possibility that durability of the decelerator and durability of the fixing plate may be reduced when the drum vibrates.

In addition, in the case where the lubricant oil is stored in the inside of the decelerator provided in the dryer, and the drying drum is configured to rotate around a rotation axis horizontal to the floor, a joint surface of the housing is located on a circumferential surface of the decelerator housing, and there is a possibility that the lubricant oil leaks to the outside through the joint surface.

Disclosure of Invention

Problems to be solved

The application provides a clothes treatment device capable of minimizing the reduction of durability of a speed reducer and the reduction of durability of a fixing plate for fixing the speed reducer.

Further, an object of the present application is to provide a clothes treating apparatus capable of minimizing the risk of leakage of lubricating oil from a decelerator having an output shaft parallel to the ground or an output shaft inclined at an angle smaller than 90 degrees with respect to the ground.

Further, an object of the present application is to provide a laundry device that reduces a rotation speed of a rotor and transmits the reduced rotation speed to a drum, and that is advantageous in maintaining concentricity (concentricity) of a rotation center of the rotor and a rotation center of the drum.

Means for solving the problems

The present application provides a laundry treating apparatus, comprising: a drum having a drum body in a cylindrical shape with two opposite sides open, a front cover provided to close one open side of the drum body and form a front face of the drum body, a rear cover provided to close the other open side of the drum body and form a rear face of the drum body, and a drum inlet penetrating the front cover and communicating with the inside of the drum body; a fixing plate provided at a position spaced apart from the rear cover; a power transmission unit having a housing fixed to the fixed plate, an input shaft having one end located outside the housing and the other end located inside the housing, an output shaft penetrating the fixed plate and having one end fixed to the rear cover and the other end located inside the housing, and a gear unit located inside the housing and transmitting rotational movement of the input shaft to the output shaft; and a motor having a stator fixed to the fixed plate or the housing and forming a rotating magnetic field, and a rotor fixed to one end of the input shaft and rotated by the rotating magnetic field.

The drum body, the rear cover, and the front cover may be formed of the same material, and the thickness of the drum body may be set to be thinner than the thickness of the rear cover and the thickness of the front cover.

The thickness of the fixing plate may be set to be thicker than the thickness of the rear cover.

The laundry treating apparatus may further include a ring-shaped plate bent portion formed by bending the fixing plate toward a direction in which the rear cover is located or a direction away from the rear cover and surrounding the output shaft.

The plate bending portion may be configured such that the fixing plate is bent toward a direction in which the rear cover is located, and the outer cover is disposed to be located inside the plate bending portion.

The laundry treating apparatus may further include a drum bent portion formed by bending the rear cover toward a direction in which the front cover is located or toward a direction in which the fixing plate is located and fixing the output shaft.

The thickness of the front cover may be set to be thickest among the thickness of the drum main body, the thickness of the rear cover, and the thickness of the front cover.

The thickness of the rear cover may be set to be thickest among the thickness of the drum body, the thickness of the rear cover, and the thickness of the front cover.

The laundry treating apparatus may further include a drum supporting part by which the circumferential surface of the front cover or the circumferential surface of the drum main body is rotatably supported.

The input shaft and the output shaft may form a concentric shaft, the input shaft and the output shaft being disposed parallel to the ground.

The input shaft and the output shaft may form a concentric shaft, the input shaft and the output shaft being arranged to be inclined at an angle of less than 90 degrees with respect to the ground.

The housing may further include: the outer cover base is provided with an input shaft through hole for the input shaft to penetrate; an input shaft support portion provided to the housing base and surrounding the input shaft through hole; a housing circumferential surface extending from an edge of the housing base toward the fixing plate and forming an accommodating space in which the gear unit is mounted; a cover body fixed to the outer circumferential surface of the housing and closing the accommodation space; an output shaft through hole provided to penetrate the cover main body and into which the output shaft is inserted; an output shaft supporting portion protruding from the cover main body toward the fixing plate and surrounding the output shaft through hole; and an oil leakage prevention portion that prevents the lubricant oil supplied to the gear unit from being discharged from the accommodation space.

The oil leakage prevention part may include: a first sealing portion sealing a space between the input shaft supporting portion and the input shaft; a second sealing portion sealing a space between the output shaft supporting portion and the output shaft; and a third sealing portion that seals a space between the outer cover circumferential surface and the cover main body.

The laundry treating apparatus may further include a cover fixing plate provided to the outer circumferential surface of the housing, the cover main body extending in a direction away from the outer circumferential surface in a radial direction of the input shaft through hole and being fixed thereto, and the third sealing portion may include a sealing protrusion protruding from the cover main body toward the cover fixing plate in a ring shape and a receiving groove provided to the cover fixing plate and receiving the sealing protrusion in a ring shape.

Effects of the invention

The application provides a clothes treating apparatus capable of minimizing the reduction of durability of a decelerator and the reduction of durability of a fixing plate for fixing the decelerator.

In addition, the present application provides a laundry treating apparatus capable of minimizing the risk of leakage of lubricating oil from a decelerator having an output shaft parallel to the ground or an output shaft inclined at an angle of less than 90 degrees with respect to the ground.

In addition, the present application provides a laundry treating apparatus which reduces a rotation speed of a rotor and transmits the reduced rotation speed to a drum, and facilitates maintaining concentricity (concentricity) of a rotation center of the rotor and a rotation center of the drum.

Drawings

Fig. 1 is a diagram illustrating an example of a laundry treating apparatus.

Fig. 2 is a view showing an example of a structure of a case and a support plate.

Fig. 3 is a diagram showing an example of a drum.

Fig. 4 is a diagram showing an example of a drying section.

Fig. 5 is a diagram showing an example of the fixing plate.

Fig. 6 and 7 are diagrams showing an example of the power transmission section.

Fig. 8 is a diagram showing an example of a coupling structure of the power transmission part, the fixing plate, and the drum.

Fig. 9 and 10 are diagrams showing the structure of the drum.

Fig. 11 is a view showing an example of the oil leakage preventing portion.

Detailed Description

Hereinafter, embodiments of the laundry treating apparatus will be described in detail with reference to the accompanying drawings.

Fig. 1 is a diagram illustrating an example of a laundry treating apparatus 100, and the laundry treating apparatus 100 may be provided to include a cabinet 1 and a drum 2 rotatably provided inside the cabinet and providing a space for storing laundry (laundry or drying object). As shown in fig. 2, a drying part 3 for removing moisture from laundry by supplying high-temperature dry air (air having a temperature higher than normal temperature and a dryness higher than that of indoor air) to the drum 2 may be provided inside the cabinet 1.

The cabinet 1 includes a front panel 11 forming a front aspect of the laundry treating apparatus and a bottom panel 17 forming a bottom surface of the laundry treating apparatus. A loading port 111 communicating with the drum 2 may be provided in the front plate 11, and the loading port 111 may be closed by a door 113.

A control board 115 may be provided on the front panel 11, and the control board 115 may have an input unit for receiving a control instruction from a user, a display unit for outputting information such as a control instruction available for selection by the user, and the like. The input part may be provided to include: a power supply requesting part requesting power supply to the laundry treating apparatus; a process input unit for enabling a user to select a desired process from a plurality of processes; and an execution request unit that requests the start of the user-selected process.

The drum 2 may be formed in a cylindrical shape with an empty interior. As shown in fig. 3, the drum 2 may be provided to include: the drum main body 21, the front and rear sides of which are open cylindrical shapes; a front cover 22 (forming a front face of the drum) fixed to the drum body 21 and closing the front face; and a rear cover 23 (forming a rear aspect of the drum) fixed to the drum body 21 and closing the rear aspect.

A drum inlet 221 for communicating the inside of the drum body 21 with the outside may be provided in the front cover 22, and an air inlet 233 for flowing outside air into the drum body 21 may be provided in the rear cover 23.

A lifter 24 may be provided to the drum body 21. The lifter 24 is a member for repeatedly lifting and lowering laundry inside the drum. The lifter 24 may be provided as a plate (board) extending from the front cover 22 toward the rear cover 23, formed by protruding from the drum body 21 toward the rotation center of the drum 2 (protruding toward the rotation center of the drum at the circumferential surface of the drum).

In the case where the laundry treating apparatus 100 is provided as an apparatus for drying only laundry, a drum through hole is not provided at the drum 2, and the drum through hole is provided to penetrate the drum main body 21 in order to communicate the inside of the drum with the outside of the drum.

On the other hand, in the case where the laundry treating apparatus 100 is provided as an apparatus for drying and washing laundry, an outer tub storing water may be provided inside the cabinet, and the drum may be rotatably provided inside the outer tub. In this case, it is necessary to provide a drum through hole for communicating the tub with the drum inside in the drum body.

As shown in fig. 4, the drum 2 described above may be rotatably fixed to at least one of the body first support 12 and the body second support 15. Fig. 4 shows an example of a case where the rear cover 23 is rotatably fixed to the main body second support portion 15 by a power transmission portion 6 described later, and the front cover 22 is rotatably connected to the main body first support portion 12.

The main body first support 12 may be provided as a support plate 121 fixed to the case 1 and located between the front plate 11 and the front cover 22. The support plate 121 may be disposed to be located between the front plate 11 and the front cover 22 by being fixed to the bottom plate 17.

The support plate 121 may be provided to include: a support plate through hole 122; a drum connecting body 123 connecting the support plate through hole 122 and the drum inlet 221; and a board connecting body 125 connecting the support board through hole 122 and the inlet 111. The support plate through hole 122 is a member that penetrates the support plate 121 and communicates the inlet 111 with the drum inlet 221.

The drum connecting body 123 may be formed of a tube fixed to the rear side of the support plate 121 (a surface facing the drum inlet in a space provided by the support plate). One end of the drum connecting body 123 may be disposed to surround the support plate through hole 122, and a free end of the drum connecting body 123 is disposed to support the front cover 22. That is, the free end of the drum connecting body 123 may be inserted into the drum inlet 221, or may be in contact with the free end (edge of the drum inlet) of the front cover 22 forming the drum inlet 221. Fig. 4 is a view showing a case where the free end of the drum connecting body 123 is in contact with the free end of the front cover 22 as an example.

The plate connecting body 125 may be formed of a tube fixed to a front face of the support plate 121 (a face toward a front plate in a space provided by the support plate). One end of the board connection body 125 may be disposed to surround the support board through hole 122, and the other end of the board connection body 125 is disposed to be connected with the input port 111. Accordingly, the laundry supplied to the input port 111 may be moved to the drum body 21 through the plate connecting body 125, the support plate through hole 122, the drum connecting body 123, and the drum input port 221.

An exhaust port 126 for exhausting air inside the drum 2 to the outside of the drum may be provided at the support plate 121, and a filter 127 may be detachably fixed to the exhaust port 126. The filter 127 may be provided in any structure that filters foreign matters from the air moving from the drum 2 to the exhaust port 126.

A drum support 128 for preventing sagging of the drum 2 may be provided to the support plate 121. The drum support may be formed of a roller fixed to the support plate 121 and rotatably supporting the drum 2. The drum support 128 may be provided to support a region of the drum located at a lower portion of a horizontal line passing through a center of the drum input port.

Although fig. 4 is a view showing a case where the drum support 128 is provided to support the front cover 22, the drum support 128 may be provided to support the circumferential surface of the drum main body 21.

The main body second support 15 may be provided as a fixing plate 151 fixed to the case 1 at a position spaced apart from the rear cover 23. Fig. 5 is a view showing a case where the fixing plate 151 is fixed to the bottom plate 17 and forms a rear aspect (rear aspect of the cabinet) of the laundry treating apparatus 100 as an example.

A plate bending portion 152 providing a space for installing the motor 5 may be provided at the fixing plate 151. The plate bending portion 152 may be provided as a groove in which the fixing plate 151 is concavely bent toward the rear cover 23 of the drum. A fixing plate through hole 153 through which a shaft (output shaft) for rotating the drum 2 passes may be provided in the fixing plate 151, and the fixing plate through hole 153 is located inside the plate bending portion 152.

As described above, if the drum 2 is formed of the drum body 21, the front cover 22 fixed to the drum body, and the rear cover 23 fixed to the drum body, the rigidity of the drum may be higher than the structure in which the open front and rear sides of the drum body 21 are rotatably coupled with the support plate 121 and the fixing plate 151, respectively. If the rigidity of the drum is increased, the deformation of the drum body 21 can be minimized when the drum rotates, which can minimize the problem of the laundry being caught in the space between the drum body and the support plate and the space between the drum body and the fixing plate when the drum body 21 is deformed (the load of the motor can be minimized).

As shown in fig. 4, the drying part 3 may be provided to include: an exhaust passage 31 connected to the exhaust port 126; a supply flow path 32 that guides air supplied from the exhaust flow path 31 to the drum main body 21; and a heat exchange unit 34 that is provided in the exhaust passage 31 and that sequentially dehumidifies and heats the air.

The exhaust flow path 31 may be provided to include: a first pipe 311 connected to the exhaust port 126; a second pipe 312 connected to the supply flow path 32; and a third pipe 313 connecting the first pipe 311 and the second pipe 312. The third pipe 313 may be fixed to the bottom plate 17.

The heat exchanging unit 34 may be formed of various devices that dehumidify and heat the air flowing into the exhaust passage 31 in order, and fig. 4 is a view showing a case where the heat exchanging unit 34 is formed of a heat pump (heat pump), as an example. That is, the heat exchanging portion 34 includes: a first heat exchanger 341 (heat absorbing unit) for removing moisture from the air flowing into the exhaust passage 31; a second heat exchanger 343 (heat generating section) provided inside the exhaust flow path 31 and configured to heat the air passing through the heat absorbing section 341; and a fan 349 that moves the air discharged from the drum 2 to the supply duct 32 after passing through the heat absorbing part and the heat generating part in order.

The heat absorbing portion 341 and the heat generating portion 343 are disposed in this order along the moving direction of the air, and are connected to each other by a refrigerant pipe 348 forming a circulation flow path of the refrigerant. The refrigerant moves along the refrigerant pipe 348 by the compressor 345 located outside the discharge flow path 31, and a pressure regulator 347 for regulating the pressure of the refrigerant is provided in the refrigerant pipe 348.

As shown in fig. 5, the air inlet 233 provided in the rear cover 23 of the drum may be formed by being disposed so as to surround the center of the rear cover 23 (the rotation center of the drum) with a plurality of holes. In this case, the supply flow path 32 may be provided to include: a supply duct 321 provided to the fixing plate 151 and forming a moving path of air discharged from the second duct 312; the first and second flow path forming parts 323 and 324 block the air inside the supply duct 321 from leaking to the outside, thereby guiding the air inside the supply duct 321 to the air inflow port 233.

The supply duct 321 may be provided to form a flow path (a moving path of air) by bending the fixing plate 151 in a direction away from the rear cover 23. In addition, the supply duct 321 may be provided in a ring shape surrounding the plate bending portion 152, and the discharge port of the second duct 312 is provided to be connected to the circumferential surface of the supply duct 321.

The first flow path forming part 323 may be provided so as to surround an outer circumferential surface (a circumferential surface having a longer diameter of two circumferential surfaces of the ring) of the air inlet 233, and the second flow path forming part 324 may be provided so as to surround an inner circumferential surface (a circumferential surface having a shorter diameter of two circumferential surfaces of the ring) of the ring of the air inlet 233.

The first flow path forming part 323 and the second flow path forming part 324 may be fixed to the rear cover 23 or to the supply duct 321, and fig. 5 is a view showing a case where the flow path forming parts 323 and 324 are fixed to the rear cover 23 as an example.

In the case of fig. 5, the free end of the first channel forming portion 323 is provided so as to surround the outer circumferential surface of the channel (annular channel) formed by the supply pipe 321, and the free end of the second channel forming portion 324 is provided so as to surround the inner circumferential surface of the channel formed by the supply pipe 321. The first and second flow path forming parts 323 and 324 may be formed of rubber, felt (felt), or the like.

The power motor 5 required for generating the rotation of the drum 2 is provided to include: a stator 51 positioned at the plate bending portion 152 and forming a rotating field; and a rotor 52 rotated by the rotating magnetic field. The rotational movement of the rotor 52 is transmitted to the drum 2 through the power transmission part 6 fixed to the fixing plate 151, and the stator 51 is fixed to at least any one of the fixing plate 151 or the power transmission part 6.

In order to prevent the motor 5 located at the plate bending portion 152 from being exposed to the outside (prevent the motor from being exposed to the outside environment, thereby improving durability of the motor and preventing safety accidents), a cover plate 19 for preventing the motor 5 from being exposed to the outside may be provided at the fixing plate 151. Further, the cover plate 19 may be provided in a shape (shape surrounding the supply duct) that also prevents the supply duct 321 from being exposed to the outside. This is not only to minimize heat loss to the outside of the supply duct 321, but also to prevent safety accidents that may occur when the body is in contact with the supply duct 321.

The stator 51 is provided to include: a ring-shaped core 511 having a through hole (core through hole) at the center; a plurality of support bars 513 radially protruding from an outer circumferential surface of the core 511; an insulator 512 insulating the core from the support bar; and a coil 514 disposed to surround the support bar 513.

The rotor 52 may be configured to include: a rotor body 521 having a disk shape; a rotor circumferential surface 522 extending from an edge of the rotor main body 521 toward the fixing plate 515 and forming a space accommodating the stator 51; and a plurality of permanent magnets 523 fixed to the rotor circumferential surface 522 so that the N-pole and the S-pole are alternately exposed.

Fig. 6 is a diagram showing an example of the power transmission portion 6 of the rear cover 23 connecting the rotor 52 and the drum.

The power transmission section 6 is provided to include: a cover H fixed to the fixing plate 151; an input shaft 64 rotatably fixed to a bottom surface (a surface facing a direction in which the rotor is located) of the housing H; an output shaft 65 rotatably fixing an upper surface (a surface facing a direction in which the fixing plate is located) of the housing H; and a gear unit G provided inside the housing and transmitting the rotational motion of the input shaft 64 to the output shaft 65.

The input shaft 64 may be formed of a shaft having one end fixed to the rotor 52 and the other end located inside the housing H, and the output shaft 65 may be formed of a shaft having one end fixed to the rear cover 23 and the other end located inside the housing H. The gear unit G is arranged to connect one end of an input shaft 64 located inside the housing H with one end of an output shaft 65 located inside the housing.

Preferably, the housing H is fixed to the fixing plate 151 and is located in a space (a space outside the cabinet) separate from a space (a space inside the cabinet) in which the drum 2 is located. This is to minimize the transfer of heat inside the cabinet (heat emitted from the drum or the drying part) to the inside of the housing H, thereby improving the durability of the power transmission part 6.

The input shaft 64 may be coupled to the rotor body 521 by a shaft fixing portion 54. The shaft fixing portion 54 may be provided to include a shaft fixing hole 541 fixing one end of the input shaft 64.

The output shaft 65 is inserted into the fixing plate through hole 153 and connected to the rear cover 23, and a shaft fastening portion 25 for fastening the output shaft 65 may be provided in the rear cover 23. This is to disperse stress acting on the center of the rear cover 23 when the output shaft 65 rotates.

The shaft fastening part 25 may be provided at a drum bending part 235 provided at the rear cover 23. Preferably, the drum bending part 235 is formed by a groove of the rear cover 23 bent toward the front cover 22 and is provided to form a ring surrounding the output shaft 65. The drum bent portion 235 can attenuate transmission of the vibration of the rear cover 23 to the output shaft 65.

Since the plate bending portion 152 provided to the fixing plate 151 can minimize transmission of vibration of the housing H to other areas of the fixing plate 151, the laundry treating apparatus 100 having the drum bending portion 235 or the plate bending portion 152 can minimize transmission of vibration of the drum to the power transmitting portion 6 (improve durability of the drum, the fixing plate, and the power transmitting portion).

In order to minimize deformation of the fixing plate 151, the housing H may be fixed to the fixing plate 151 by a transmission part bracket 61 and a housing fastening part.

As shown in fig. 5, a bracket through hole 611 through which the output shaft 65 passes may be provided in the transmission portion bracket 61, and the cover fastening portion may be provided as a bolt connecting the cover H and the transmission portion bracket 61. The conveying section bracket 61 may be formed of the same material as the fixing plate 151 or a material having a higher strength than the fixing plate 151.

As shown in fig. 6, the housing H may be configured to include: a cover main body 62 having a cylindrical shape with an empty interior and having an open hole formed in a surface facing the fixed main body 151; and a cover 63 fixed to the cover main body 62 and closing the open hole.

The housing main body 62 may be provided to form an accommodating space 621 in which the gear unit G is mounted. The receiving space 621 may be formed by a housing base 62a to which the input shaft 64 is fixed, and a housing circumferential surface 62b extending from an edge of the housing base 62a toward the housing cover 63.

As shown in fig. 7, an input shaft support portion 625 extending from the housing base 62a toward the rotor 52 may be provided to the housing main body 62, and the input shaft support portion 625 may be provided as a tube surrounding an input shaft through hole 626 penetrating the housing main body 62.

The input shaft 64 inserted into the input shaft through hole 626 is rotatably fixed to the input shaft support portion 625 by input shaft bearings 628 and 629. The input shaft bearing) may be provided including: an input shaft first bearing 628 fixed to the input shaft support 625; and an input shaft second bearing 629 fixed inside the input shaft through hole 626 and located between the input shaft first bearing 628 and the rotor 52.

The cover 63 may be provided in any shape that can be opened and closed in the opening hole of the cover main body 62, and fig. 7 is a view showing, as an example, a case where the cover 63 is provided in a disk-shaped cover main body 631. The cover 63 may be fixed to the cover main body 62 by a cover fixing plate 623 provided on the cover circumferential surface 62 b.

The cover 63 may be provided to include: an output shaft through hole 632 provided to penetrate the cover body 631; and a tube-shaped output shaft support 635 extending from the cover body 631 toward the fixing plate 151 and surrounding the output shaft through hole 632.

Output shaft bearings 638, 639 for rotatably fixing the output shaft 65 to the output shaft through hole 632 may be provided at the output shaft support 635.

The output shaft bearing may be provided to include an output shaft first bearing 638 fixed to the output shaft support 635 and located inside the output shaft through hole 631, and an output shaft second bearing 639.

A mounting portion 637 for fixing the stator 51 may be provided at an edge of the cover body 631. In this case, the stator 51 may be fixed to the housing H by bolts coupling the insulator 512 and the mounting portion 637.

The gear unit G may be provided to include: a ring gear 66 fixed to the housing circumferential surface 62b and located in the accommodation space 621; a driving gear 69 fixed to the input shaft 64 and positioned inside the accommodation space 621; a holder 67 positioned inside the accommodation space 622 and fixing the other end of the output shaft 65; and a driven gear 68 rotatably fixed to the holder 67 and connecting the driving gear 69 and the ring gear 66.

The ring gear 66 may be provided to include: a gear main body 661 fixed to the outer cover circumferential surface 62b; a gear body through hole 663 provided to penetrate the gear body; and gear teeth 665 (GEAR TEETH) provided along an inner circumferential surface of the gear body.

The holder 67 may be provided to include: a first base 671 located inside the gear body through hole 663 and fixing one end of the output shaft 65; a second base 672 located inside the gear body through hole 663 and provided with a base through hole 673 at the center; and a connecting shaft 675 connecting the first base and the second base and forming a rotation axis of the driven gear 68. Since the output shaft 65 is fixed to the first base 671, whether the output shaft 65 rotates depends on whether the holder 67 rotates.

The driven gear 68 may be formed of a plurality of gears rotatably fixed to the connection shaft 675, and the drawing is a drawing showing a case where the driven gear is formed of a first driven gear 681, a second driven gear 682, and a third driven gear 683 as an example.

The input shaft 64 is inserted into the base through hole 673 and is coaxial with the output shaft 65, and the gear teeth provided on the driving gear 69 are positioned in the space formed between the driven gears and meshed with the gear teeth of the driven gears 682, 683.

When the output shaft 65 rotates, the output shaft 65 is connected to the rear cover 23 of the drum through the shaft fastening part 25 in order to disperse stress acting on the center of the rear cover 23 (in order to minimize the reduction of durability of the rear cover).

As shown in fig. 8, a rear cover through hole 231 is provided in the rear cover 23, and the shaft fastening part 25 may be provided to be positioned at the drum bending part 235 of the rear cover 23 and to close the rear cover through hole 231.

The shaft fastening portion 25 is provided with a fastening portion through hole 251 into which the output shaft 65 is inserted. The output shaft 65 inserted into the fastening portion through hole 251 may be fixed to the shaft fastening portion 25 by a nut 252. For this purpose, a screw 651 needs to be provided on the circumferential surface of the output shaft.

In order to prevent the shaft fastening portion 25 from being exposed inside the drum 2, a fastening portion cover 27 may be provided to the laundry treating apparatus 100. The fastening portion cover 27 may be provided in any shape capable of closing the rear cover through hole 231 and preventing the shaft fastening portion 25 from being exposed.

The fastening portion cover 27 may be fixed to the output shaft 65 by bolts 273. For this purpose, a cover through hole 271 into which the bolt 273 is inserted may be provided in the fastening portion cover 27, and a fastening groove 652 for fastening the bolt may be provided at one end of the output shaft 65.

In order to easily achieve the coupling of the output shaft 65 and the shaft fastening portion 25, a washer 653 (washer) may be further provided to the output shaft 65. The washer 653 is provided to have a diameter larger than that of the free end of the output shaft 65 (the end of the output shaft where the screw is formed), and a washer through hole 654 into which the free end of the output shaft 65 is inserted is provided at the center.

The washer 653 not only allows the rear cover 23 of the drum and the output shaft 65 to be assembled at right angles (improves the assembling property), but also reduces the risk of the nut 252 being separated from the screw 651 by vibration.

Next, the operation of the power transmission unit 6 will be described. The input shaft 64 rotates as the rotor 52 rotates. When the driving gear 69 rotates through the input shaft 64, the driven gears 681, 682, 683 engaged with the driving gear 69 also rotate. Since the driven gears 681, 682, 683 are engaged with the ring gear 66 fixed to the housing main body 62, when the driven gear 68 rotates, the cage 67 and the output shaft 65 rotate, and the drum 2 fixed to the output shaft 65 also rotates.

The laundry treating apparatus 100 having the above-described structure transmits vibration to the power transmitting part 6 and the fixing plate 151 when the drum 2 rotates. This is because the laundry repeatedly rises and falls inside the drum as the drum rotates, vibration generated from the drum is transmitted to the gear unit G and the housing H through the output shaft 65, and vibration of the housing H is transmitted to the fixing plate 151.

In order to minimize the durability of the power transmission part 6 including the gear unit G and the durability of the fixing plate 151, the drum 2 may be provided in a structure capable of absorbing a portion of vibration generated when laundry falls inside the drum.

As described above, the drum 2 is constituted by the combination of the drum body 21, the front cover 22, and the rear cover 23. In this case, most of the laundry dropped by the rotation of the drum collides with the drum body 21. Therefore, if the rigidity of the drum main body 21 is set to be weaker than the rigidity of the front cover 22 and the rigidity of the rear cover 23, the drum main body 21 absorbs a part of the force generated when laundry collides with the drum main body.

Fig. 9 is a view showing an example in which the rigidity of the drum body 21 can be reduced in the case where the drum body 21, the front cover 22, and the rear cover 23 are formed of the same material.

In this case, the thickness t1 of the drum body 21 may be set to be thinner than the thickness t3 of the rear cover 23 and the thickness t2 of the front cover 22. If the thickness t1 of the drum body 21 is set to be thinner than the thicknesses t2, t3 of the other two covers, the drum body 21 can absorb a part of the force applied to the drum 2 when the laundry drops. Accordingly, the drum 2 having the structure of fig. 9 can minimize the transmission of external force to the housing H and the fixing plate 151.

On the other hand, since the drum inlet 221 is provided in the front cover 22, the front cover 22 has a lower rigidity than the drum main body 21 or the rear cover 23. To compensate for this, the thickness t3 of the front cover 22 in the drum 2 may be set to be thickest. This also applies to the case of the structure in which the front cover 22 is supported by the drum support 128 described above.

However, if the circumferential surface of the front cover 22 is a structure supported by the drum support 128, the front cover 22 is less likely to deform, and therefore the thickness t3 of the rear cover 23 in the drum 2 is preferably set to be thickest. This is because the rear cover 23 needs to be set to transmit the force supplied from the output shaft 65 to the drum main body 21. If the thickness t3 of the rear cover is set to be the thickest, an effect that the transmission of the vibration of the drum main body 21 to the output shaft 65 is also minimized can be expected.

As will be further described with reference to fig. 10, vibrations generated inside the drum 2 are first reduced by the drum body 21 having the thinnest thickness. The vibration not absorbed by the drum body 21 may be absorbed by the rear cover 23 thicker than the drum body 21, and the vibration not absorbed by the rear cover 23 may be transmitted to the housing H of the power transmission part 6 through the output shaft 65.

The cover H is fixed to the fixing plate 151, and since a portion of the vibration transmitted to the cover H is absorbed by the fixing plate 151, the laundry treating apparatus having the above-described structure can minimize the transmission of the vibration inside the drum 2 to the gear unit G provided inside the cover H.

On the other hand, since the housing H of the power transmission unit 6 is fixed to the plate bending portion 152, the laundry treating apparatus having the above-described structure can minimize transmission of the vibration transmitted to the housing H through the output shaft 65 to other areas of the fixing plate 15.

Accordingly, the laundry treating apparatus 100 can minimize the problem of the durability of the power transmission part 6 being lowered and the problem of the durability of the fixing plate 151 being lowered due to vibration generated when the drum rotates.

The output shaft 65 and the input shaft 64 provided in the power transmission unit 6 form a concentric shaft, and the output shaft 65 and the input shaft 64 are provided in parallel with A1 (ground, a bottom surface of a space where the case is provided). This means that the joint surface of the housing main body 62 and the housing cover 63 is orthogonal to the ground, and due to this structural feature, there is a possibility that the lubricating oil supplied to the gear unit G leaks through the joint surface of the housing main body 62 and the housing cover 63.

In order to prevent the lubricant inside the housing space 621 from leaking to the outside of the housing H, an oil leakage preventing portion 7 may be provided in the power transmitting portion 6.

Fig. 11 is a view showing an embodiment of the oil leakage prevention section 7. The oil leakage prevention part 7 may be provided to include: a first seal portion 71 that seals a space between the input shaft support portion 625 and the input shaft 64; a second sealing portion 72 sealing a space between the output shaft support portion 635 and the output shaft 65; and a third sealing part 73 for sealing the joint surface between the outer cover circumferential surface 62b and the cover main body 631.

The first sealing portion 71 may be formed of an annular gasket (gasket) fixed to the inside of the input shaft support portion 625. In this case, the first seal portion 71 may be disposed between the input shaft first bearing 628 and the input shaft second bearing 629, or may be disposed between the input shaft second bearing 629 and the free end F1 of the input shaft support portion 625.

The second sealing portion 72 may be formed of an annular gasket (gasket) fixed to the inside of the output shaft support portion 635. In this case, the second sealing portion 72 may be disposed between the output shaft first bearing 638 and the output shaft second bearing 639, or between the output shaft second bearing 639 and the free end F2 of the output shaft support portion 635.

Unlike the one shown in the figures, if the input shaft bearing and the output shaft bearing are each formed of only one bearing, it is preferable that the first seal portion 71 is disposed to be located between the input shaft bearing and the free end F1 of the input shaft supporting portion, and the second seal portion 72 is disposed to be located between the output shaft bearing and the free end F2 of the output shaft supporting portion.

The third sealing portion 73 may be formed of various structures capable of sealing the joint surface between the outer cover circumferential surface 62b and the cover main body 631. In the housing H of fig. 11, the cover main body 631 is connected to the housing main body 62 by a cover fixing plate 623. Therefore, it is preferable that the third sealing portion 73 is provided to seal edges (a region in contact with the cover fixing plate) of the cover fixing plate 623 and the cover main body 631.

As shown, the third sealing part 73 may be formed of a ring-shaped gasket 733 (gasket) located between the cover main body 631 and the cover fixing plate 623.

In contrast, the third sealing part 73 may be provided to include a sealing protrusion 731 having a ring shape protruding from any one of the cover main body 631 and the cover fixing plate 623 toward the other, and a sealing groove 732 provided to the remaining one of the cover main body 631 and the cover fixing plate 623 and accommodating the sealing protrusion 731. The drawing is a view showing a case where the sealing protrusion 731 is provided to the cover main body 631 and the sealing groove 732 is provided to the cover fixing plate 623. The sealing protrusion 731 and the sealing groove 732 may be configured to be joined by thermal welding.

The number of the sealing protrusions 731 and the sealing grooves 732 may be two or more, although not shown. That is, the sealing protrusion 731 may be provided to include a first protrusion having a ring shape centered on the output shaft through hole 632 and a second protrusion having a ring shape centered on the output shaft through hole 632 and having a diameter larger than that of the first protrusion, and the sealing groove 732 may be provided to include a first groove accommodating the first protrusion and a second groove accommodating the second protrusion.

Further, the third sealing part 73 may be further provided to include the sealing protrusion 731, a sealing groove 732, and a gasket 733. In this case, the gasket 733 may be disposed to surround the sealing protrusion 731, or the sealing protrusion 731 may be disposed to surround the gasket 733.

The first seal portion 71 and the second seal portion 72 may be formed of a material different from that of the housing H. In this case, since the thermal deformation ratio of the seal portions 71, 72 is different from that of the housing H, the possibility of the seal portions 71, 72 being separated from the housing H cannot be excluded in some cases.

In order to prevent the first and second sealing parts 71 and 72 from being separated from the housing H, the sealing fixing parts 74 and 75 may be provided in the laundry treating apparatus 100.

The seal fixing portion may be provided to include: a first fixing portion 74 that prevents the first seal portion 71 from being separated from the input shaft support portion 625; and a second fixing portion 75 preventing the second sealing portion 72 from being separated from the output shaft supporting portion 635.

The first fixing portion 74 may be formed of a protrusion or a rib in a ring shape protruding from the input shaft support portion 625 toward the center of the input shaft through hole 626 (the circumferential surface of the input shaft). In this case, the distance L1 from the circumferential surface of the input shaft support portion 625 to the free end of the first fixing portion 74 may be set to be larger than the distance from the circumferential surface of the input shaft support portion 625 to the circumferential surface of the first seal portion 71 and smaller than the distance from the circumferential surface of the input shaft support portion 625 to the circumferential surface of the input shaft 64.

Likewise, the second fixing portion 75 may be formed of a protrusion or a rib in a ring shape protruding from the output shaft support portion 635 toward the center of the output shaft through hole 632 (the circumferential surface of the output shaft). In this case, the distance L2 from the circumferential surface of the output shaft support portion 635 to the free end of the second fixing portion 75 may be set to be greater than the distance from the circumferential surface of the output shaft support portion 635 to the circumferential surface of the second sealing portion 72 and less than the distance from the circumferential surface of the output shaft support portion 635 to the circumferential surface of the output shaft 65.

In the above-described embodiment, the laundry machine 100 in which the drum 2 rotates about the axis parallel to the ground is described as a reference, but the configuration of the drum 2 and the oil leakage prevention portion 7 described above may be applied to a case in which the axis of the drum is inclined with respect to the ground. That is, as shown in fig. 9, the drum 2 and the oil leakage preventing portion 7 described above may be applied to a case where a straight line connecting the input shaft and the output shaft is inclined A2 at an angle smaller than 90 degrees with respect to the ground.

The laundry treatment apparatus described above may be modified to various modes, and thus the scope of the present application is not limited to the above-described embodiments.

Claims (13)

1. A laundry treating apparatus, comprising:

A drum having a drum body in a cylindrical shape with two opposite sides open, a front cover provided to close one open side of the drum body and form a front face of the drum body, a rear cover provided to close the other open side of the drum body and form a rear face of the drum body, and a drum inlet penetrating the front cover and communicating with the inside of the drum body;

a fixing plate provided at a position spaced apart from the rear cover;

A power transmission unit having a housing fixed to the fixed plate, an input shaft having one end located outside the housing and the other end located inside the housing, an output shaft penetrating the fixed plate and having one end fixed to the rear cover and the other end located inside the housing, and a gear unit located inside the housing and transmitting rotational movement of the input shaft to the output shaft; and

A motor having a stator fixed to the fixed plate or the housing and forming a rotating magnetic field, and a rotor fixed to one end of the input shaft and rotated by the rotating magnetic field,

The drum body, the rear cover, and the front cover are formed of the same material, and the thickness of the drum body is set to be thinner than the thickness of the rear cover and the thickness of the front cover.

2. The laundry treatment apparatus according to claim 1, wherein,

The thickness of the fixing plate is set to be thicker than the thickness of the rear cover.

3. The laundry treatment apparatus according to claim 2, wherein,

The device also comprises a ring-shaped plate bending part, wherein the plate bending part is formed by bending the fixing plate towards the direction of the rear cover or the direction away from the rear cover and surrounds the output shaft.

4. A laundry treatment apparatus according to claim 3, wherein,

The plate bending part is arranged in such a way that the fixing plate is bent towards the direction where the rear cover is located, and the outer cover is positioned inside the plate bending part.

5. The laundry treatment apparatus according to claim 4, wherein,

The rotary drum comprises a front cover and a rear cover, and is characterized by further comprising a rotary drum bending part which is formed by bending the rear cover towards the direction of the front cover or towards the direction of the fixing plate and used for fixing the output shaft.

6. The laundry treatment apparatus according to any one of claims 1 to 5, characterized in that,

The thickness of the front cover is set to be thickest among the thickness of the drum main body, the thickness of the rear cover, and the thickness of the front cover.

7. The laundry treatment apparatus according to any one of claims 1 to 5, characterized in that,

The thickness of the rear cover is set to be thickest among the thickness of the drum main body, the thickness of the rear cover, and the thickness of the front cover.

8. The laundry treatment apparatus according to claim 6, wherein,

The drum assembly further includes a drum support portion by which the circumferential surface of the front cover or the circumferential surface of the drum body is rotatably supported.

9. The laundry treatment apparatus according to claim 6, wherein,

The input shaft and the output shaft form a concentric shaft, and the input shaft and the output shaft are parallel to the ground.

10. The laundry treatment apparatus according to claim 6, wherein,

The input shaft and the output shaft form a concentric shaft, the input shaft and the output shaft being inclined at an angle of less than 90 degrees relative to the ground.

11. The laundry treatment apparatus according to claim 9, wherein,

The housing further includes:

the outer cover base is provided with an input shaft through hole for the input shaft to penetrate;

An input shaft support portion provided to the housing base and surrounding the input shaft through hole;

A housing circumferential surface extending from an edge of the housing base toward the fixing plate and forming an accommodating space in which the gear unit is mounted;

A cover body fixed to the outer circumferential surface of the housing and closing the accommodation space;

An output shaft through hole provided to penetrate the cover main body and into which the output shaft is inserted;

An output shaft supporting portion protruding from the cover main body toward the fixing plate and surrounding the output shaft through hole; and

And an oil leakage preventing part for preventing the lubricant supplied to the gear unit from being discharged from the accommodating space.

12. The laundry treatment apparatus of claim 11, wherein,

The oil leakage prevention part includes:

A first sealing portion sealing a space between the input shaft supporting portion and the input shaft;

a second sealing portion sealing a space between the output shaft supporting portion and the output shaft; and

And a third sealing part for sealing a space between the outer circumferential surface of the outer cover and the cover main body.

13. The laundry treatment apparatus of claim 12, wherein,

The cover fixing plate is arranged on the circumferential surface of the outer cover, extends along the radial direction of the input shaft through hole to the direction away from the circumferential surface of the outer cover and is fixedly provided with the cover main body,

The third sealing part is provided to include a sealing protrusion in a ring shape protruding from the cover main body toward the cover fixing plate, and a receiving groove in a ring shape provided to the cover fixing plate and receiving the sealing protrusion.