KR102476293B1 - Washing machine - Google Patents

Abstract

A washing machine according to an embodiment of the present invention includes a cabinet having an open upper surface and forming an outer shape; a top cover covering the upper surface of the cabinet and having a laundry inlet formed therein; a door coupled to the top cover to open and close the laundry inlet; a base coupled to a lower end of the cabinet to support the cabinet; an outer tub accommodated inside the cabinet and filled with washing water; an inner tub accommodated inside the outer tub and into which laundry is put; a pulsator mounted on the bottom of the tub to forcibly flow wash water and laundry; A drive unit mounted on the bottom of the outer tub to provide rotational force to the pulsator and the inner tub, and to prevent wash water overflowing through the top of the outer tub and colliding with the base and scattering, so that the washing water does not flow into the drive unit. It is characterized in that at least a portion of the scattering prevention rib is formed extending to a predetermined height upward.

Description

Washing machine {Washing machine}

The present invention relates to washing machines.

In general, a washing machine includes an outer tub containing wash water and a drum rotatably provided in the outer tub to accommodate clothes and the like (hereinafter referred to as 'wash cloth'), and as the drum rotates, washing and spin-drying of the laundry are performed. It is done.

The washing machine has a top loading type in which the center of rotation of the drum is formed vertically and the laundry can be loaded from the top, and the center of rotation of the drum is formed horizontally or inclined in a direction that decreases toward the rear end, It can be divided into a front loading type designed to be able to insert the laundry from the front.

The top-loading type washing machine can be largely divided into an agitator type and a pulsator type. The agitation type performs washing by rotating a washing rod protruding from the center of the drum, and the vortex type uses the lower part of the drum Washing is performed by rotating the disk-shaped pulsator or drum formed on the

The front-loading method is commonly referred to as a drum washing machine, and a lifter is provided on an inner circumferential surface of a drum, and as the drum rotates, the lifter lifts and drops the laundry to perform washing.

Korean Patent Publication No. 10-2004-0071430 (August 12, 2004) (hereinafter referred to as prior art) discloses a top-loading fully automatic washing machine.

The washing machine presented in the prior art includes a driving motor for providing driving force, a spin-drying shaft for rotating the outer tub, a washing shaft for driving the pulsator, and a coupler for selectively driving the spin-drying and washing shafts. A driving unit is provided.

The coupler transfers the rotational force generated from the driving motor to the pulsator during washing, and simultaneously transfers it to the pulsator and the outer tub during spin-drying. That is, the washing shaft is always coupled to the driving motor, and the spin-drying shaft is selectively coupled to the driving motor. To this end, the coupler is engaged with the dehydration shaft to be able to move up and down, and has a tooth surface on an outer circumferential surface that can be engaged with the rotor of the drive motor. Accordingly, when the coupler ascends, the coupling between the dewatering shaft and the rotor is released, and when descending, the coupler engages with the rotor to transmit rotational force of the rotor to the dehydration shaft.

On the other hand, since the planetary gear is mounted on a portion connecting the rotating shaft of the driving motor and the washing shaft, torque of the driving motor for driving the pulsator in the washing mode is reduced. That is, compared to a washing machine without a planetary gear, there is no inconvenience in driving the pulsator even when a drive motor having a relatively small torque is applied. Therefore, there is an advantage in that the size of the drive motor can be slimmed down by reducing the stacking height of the rotor and the stator core and the height of the rotor.

However, the washing machine proposed in the prior art may have the following problems due to the slimming of the motor.

As the stacking height of the stator core decreases and the height of the rotor decreases, the distance between the upper surface of the motor and the lower surface of the bearing housing in which the motor is mounted increases. Then, during the washing process, the wash water splashes to the top of the outer tub and falls to the bottom of the washing machine, or the water overflows to the top of the outer tub and falls to the bottom of the washing machine due to a failure of a water supply-related part such as a water supply valve. It may flow into the motor through the spaced space between the housings. Then, the insulation breakdown of the motor may be caused by moisture flowing into the motor. If the motor is damaged due to insulation breakdown of the motor, the motor itself may need to be replaced or a fire may occur in the motor.

Prior Art: Korean Patent Publication No. 10-2004-0071430 (August 12, 2004)

The present invention is proposed to improve the above problems.

A washing machine according to an embodiment of the present invention for achieving the above object includes a cabinet having an open upper surface and forming an outer shape; a top cover covering the upper surface of the cabinet and having a laundry inlet formed therein; a door coupled to the top cover to open and close the laundry inlet; a base coupled to a lower end of the cabinet to support the cabinet; an outer tub accommodated inside the cabinet and filled with washing water; an inner tub accommodated inside the outer tub and into which laundry is put; a pulsator mounted on the bottom of the tub to forcibly flow wash water and laundry; a driving unit mounted on the bottom of the outer tub to provide rotational force to the pulsator and the inner tub; and a water guide provided at an outer edge of a bottom portion constituting the outer tub to prevent wash water flowing down an outer wall of the outer tub from permeating into the drive unit, wherein the drive unit is fixed to the bottom portion of the outer tub, A bearing housing in which a planetary gear is accommodated, a stator coupled to the bearing housing at a position spaced downward from the bottom surface of the bearing housing, and a rotor accommodating the stator therein and rotating around the stator, A washing shaft connecting the center of the rotor with the planetary gear and the pulsator, and a spin-drying shaft in which the washing shaft is inserted and connecting the planetary gear and the inner tub, wherein the water guide comprises: It is characterized in that the bottom portion extends a predetermined length in the circumferential direction of the outer shell, and extends downward from at least the bottom portion of the outer shell to a point corresponding to the top surface of the rotor or a point lower than the top surface of the rotor.

According to the washing machine according to the embodiment of the present invention having the configuration as described above, it is possible to prevent the phenomenon of washing water flowing out of the outer tub and falling to the bottom of the washing machine from flowing into the motor, thereby preventing insulation breakdown of the motor. There are advantages.

1 is a cross-sectional view of a washing machine according to an embodiment of the present invention.
Figure 2 is a perspective view showing a state in which the driving unit is installed in the outer shell according to an embodiment of the present invention.
3 is a perspective view showing the driving unit;
4 is a side view of the drive unit;
5 is an exploded perspective view of the drive unit;
6 is a longitudinal sectional view of the drive unit;
7 is a perspective view showing a driving motor removed from the driving unit;
8 is a perspective view showing a rotor of the drive unit;
9 is a longitudinal sectional view showing a driving unit in a dewatering mode according to an embodiment of the present invention;
10 is a bottom perspective view of a clutch stopper according to an embodiment of the present invention;
11 is a bottom perspective view of a clutch stopper coupled with a clutch lever;
Fig. 12 is a bottom view of the clutch stopper shown in Fig. 11;
13 is a plan perspective view of a clutch stopper coupled with a clutch lever;
14 is an enlarged cross-sectional view showing part A of FIG. 1;
15 is a perspective view showing the base of the washing machine equipped with the scattering prevention ribs;
16 is a partial cross-sectional view of a washing machine equipped with a base according to another embodiment of the present invention.
17 is a plan perspective view of the base according to the other embodiment.
18 is an enlarged view of part B of FIG. 17;
19 is a side view showing an outer tub of a washing machine equipped with a scattering prevention structure according to another embodiment of the present invention;
20 is a bottom view of the outer shell;
21 is a partial perspective view showing an outer tub and a driving part of a washing machine equipped with a scattering prevention structure according to another embodiment of the present invention;
22 is a perspective view showing the scattering prevention structure;

Hereinafter, a washing machine according to an embodiment of the present invention will be described in detail with reference to the drawings.

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

Referring to FIG. 1 , a washing machine 1 according to an embodiment of the present invention includes a case 10 forming an exterior, a top cover 11 disposed on top of the case 10, and the case 10. It may include a base 12 disposed at the bottom.

The case 10 is formed in a rectangular shape having an inner space, and upper and lower ends are open. Various devices necessary for washing may be provided inside the case 10 .

The top cover 11 is disposed at an open top of the case 10 and forms a laundry inlet (not shown) into which laundry is put. In addition, a door 13 capable of opening and closing the laundry inlet is provided on the upper side of the top cover 11 . For example, the door 13 may be provided to be rotatable by a user.

The base 12 is disposed to shield the open lower end of the case 10 . One or a plurality of legs 14 are disposed on the bottom surface of the base 12 to separate the base 12 from the bottom surface. Also, the level of the washing machine 1 may be adjusted by rotating the leg 14 . In addition, the base 12 may be provided with a scattering prevention rib 300 according to an embodiment of the present invention, and details of the scattering prevention rib 300 will be described in detail with reference to the drawings below.

In addition, the washing machine 1 is provided with a control panel 15 composed of various devices capable of controlling the washing machine 1. The control panel 15 may be provided on an upper surface of the top cover 11 .

The control panel 15 may include various input units provided so that the user can operate the washing machine 1 and a display unit capable of showing the status of the washing machine 1 to the user. In addition, various PCBs (not shown) may be disposed on the control panel 15 to control the configuration of the washing machine 1 according to a signal input through the input unit.

In the inner space of the washing machine 1 formed by the case 10, the top cover 11, and the base 12, an outer tub 20 and an inner tub 30 having a cylindrical shape are installed. The inner tub 30 has a smaller diameter than the outer tub 20 so as to be accommodated inside the outer tub 20 .

The outer tub 20 is filled with wash water for washing laundry. The outer tub 20 is formed in a cylindrical shape, and an opening 21 through which laundry clothes can enter and exit may be formed on an upper surface.

The outer tank 20 may be installed inside the case 10 by a support member 22 and spaced upward from the base 12 by a predetermined distance. For example, the upper end of the support member 22 may be supported on the upper part of the case 10 and the lower end may be coupled to the lower part of the outer tub 20 . In addition, a damper 24 for absorbing vibrations generated from the outer tub 20 and the inner tub 30 may be provided at a lower end of the support member 22 .

The damper 24 may include a spring that absorbs vibration generated in the inner tub 30 or the drive unit 100 to be described later and transmitted to the outer tub 20 through elastic deformation.

The inner tub 30 may be defined as a washing tub that rotates by a driving unit 100 to be described later for washing, rinsing, and spin-drying of laundry. The inner tub 30 may be accommodated inside the outer tub 20, and the outer surface of the inner tub 30 is spaced apart from the inner surface of the outer tub 2 by a predetermined distance.

A plurality of wash holes 32 through which washing water flows in and out are formed on the side surface of the inner tub 30 . Accordingly, wash water supplied to the outer tub 20 may be filled in the inner tub 30 through the plurality of wash holes 32 .

In addition, a filter unit 34 for collecting various foreign substances including lint contained in wash water may be provided on an inner circumferential surface of the inner tub 30 . A plurality of filter units 34 may be installed in a circumferential direction of the inner tub 30 .

Meanwhile, a water supply passage connected to an external water supply source and supplying wash water into the outer tub 20 and the inner tub 30 is provided inside the washing machine 1 . A water supply valve opening and closing the water supply passage is provided in the water supply passage. The water supply valve may be provided in plurality according to the type of water to be supplied. For example, the water supply valve may include a hot water valve and a cold water valve.

In addition, a drain passage 45 for draining wash water from the outer tub 20 and the inner tub 30 to the outside of the washing machine 1 is provided inside the washing machine 1 . A drain valve 46 for opening and closing the drain passage 45 is provided in the drain passage 45 . In addition, a drain pump 47 for pumping wash water drained into the drain passage 45 to the outside may be further provided in the drain passage 45 .

In addition, a pulsator 50 rotatably provided at the bottom of the inner tub 30 to form a water flow for washing.

In addition, a driving unit 100 providing power for rotating the inner tub 30 or the pulsator 50 is provided inside the washing machine 1 . The driving unit 100 includes a spin-drying shaft for rotating the inner tub 30 and a washing shaft for rotating the pulsator 50, and selectively rotates the spin-drying shaft and the washing shaft.

2 is a bottom perspective view of an outer tub in which a drive unit is installed according to an embodiment of the present invention, FIG. 3 is a perspective view of the drive unit, and FIG. 4 is a side view of the drive unit.

Referring to FIGS. 2 to 4 , the driving unit 100 according to the embodiment of the present invention is disposed below the outer tub 20 . The driving unit 100 may be understood as means for providing power to rotate the pulsator 50 or to rotate the pulsator 50 and the inner tub 20 together.

The driving unit 100 includes a washing shaft 110 that transmits power to the pulsator 50, a spin-drying shaft 120 that transmits rotational power to the inner tub 30, and the washing shaft 110. A bearing housing 130 supporting the spin-drying shaft 120, and drive motors 180 and 190 disposed under the bearing housing 130 to provide driving force to the washing shaft 110 or the spin-drying shaft 120 can include

Hereinafter, the driving unit 100 will be described in more detail with reference to the drawings.

5 is an exploded perspective view of the drive unit, FIG. 6 is a longitudinal cross-sectional view of the drive unit, FIG. 7 is a perspective view showing a driving motor removed from the drive unit, and FIG. 8 is a perspective view showing a rotor of the drive unit.

5 to 8 , the driving unit 100 includes a washing shaft 110, a spin-drying shaft 120, a bearing housing 130, and driving motors 180 and 190, as described above.

In detail, the washing shaft 110 includes an upper washing shaft 111 and a lower washing shaft 115 positioned under the upper washing shaft 111 . The dehydration shaft 120 includes an upper dehydration shaft 121 and a lower dehydration shaft 125 positioned below the upper dehydration shaft 121 .

The upper washing shaft 111 penetrates the center of the upper spin-drying shaft 120 and protrudes into the inner tub 30, and the upper washing shaft 111 protrudes into the inner tub 30. One end is coupled to the pulsator 50. The other end of the upper washing shaft 111 extends downward and is connected to the planetary gear module 140 disposed inside the bearing housing 130.

The upper washing shaft 111 is fixed to the bottom of the inner tub 30 and rotates together with the inner tub 30 .

The lower washing shaft 115 is spaced apart from the upper washing shaft 111 to the lower side. The lower end of the lower washing shaft 115 is coupled to the rotor 190 of the drive motor, and the upper end is connected to the planetary gear module 140. That is, the planetary gear module 140 connects the lower end of the upper washing shaft 111 and the upper end of the lower washing shaft 115.

The upper washing shaft 111 is inserted through the upper spin-drying shaft 121, and the upper spin-drying shaft 121 and the upper washing shaft 111 are concentric. One end of the upper dewatering shaft 121 is coupled to the inner tub 30 to transmit rotational force to the inner tub 30, and the other end is connected to the planetary gear module 140.

The lower dehydration shaft 125 is spaced apart from the upper dehydration shaft 121 to the lower side. The lower washing shaft 115 is inserted through the lower spin-drying shaft 125, and the lower spin-drying shaft 125 and the lower washing shaft 115 are concentric. The lower dewatering shaft 125 has an upper end connected to the planetary gear module 140 and a lower end coupled to the rotor 190 by a coupler 150 to be described later to receive rotational force. At this time, a serration for engagement with the coupler 150 is formed on the outer circumferential surface of the lower dewatering shaft 125 . Accordingly, the coupler 150 is installed to be movable up and down along the lower spin-drying shaft 125.

According to the configuration of the present invention described above, the rotational force generated by the driving motor is decelerated through the planetary gear module 140 and transmitted to the upper washing shaft 111 and/or the upper spin-drying shaft 121. Therefore, the pulsator 50 or the inner tub 30 is rotated with a relatively high torque, so that the driving motor can be efficiently operated, and as a result, the driving motor can be made slimmer.

The bearing housing 130 supports the washing shaft 110 and the spin-drying shaft 120 and accommodates a planetary gear module 140 including a plurality of gears therein. The bearing housing 130 is disposed below the outer tub 20 . The bearing housing 130 may be fixed to the lower surface of the outer tub 20 by a fastening member. A plurality of fastening holes 131 through which the fastening member passes may be formed at an edge of an upper surface of the bearing housing 130, and the plurality of fastening holes 131 are formed in a circumferential direction of the housing 130. may be spaced apart. Also, the fastening member passing through the fastening hole 131 is inserted and fixed to the bottom surface of the outer tub 20 .

The bearing housing 130 forms an inner space accommodating the planetary gear module 140 . In detail, the bearing housing 130 may include a housing case 130a in which the planetary gear module 140 is accommodated in the inner center, and a housing cover 130b covering the open upper surface of the housing case 130a. can Also, the plurality of fastening holes 131 may be disposed at an outer edge of the housing cover 130b.

Also, a clutch stopper 160 may be coupled to a lower portion of the bearing housing 130 by a fastening member. Specifically, a plurality of fastening holes 133 through which the fastening member is inserted may be formed on the bottom surface of the housing case 130a. As the fastening member passes through the clutch stopper 160 and is inserted into the fastening hole 133 , the clutch stopper 160 may be mounted on the lower surface of the bearing housing 130 .

The plurality of fastening holes 133 may be formed of three, but are not limited thereto, and may be arranged at equal intervals.

Meanwhile, the upper washing shaft 111 and the upper spin-drying shaft 121 are inserted through the center of the upper surface of the bearing housing 130, that is, the center of the housing cover 130b.

In detail, a sleeve 130c for inserting a bearing may be formed extending from the center of the housing cover 130b, and the upper dehydration shaft 121 passes through the sleeve 130c to reach the planetary gear module 140. Connected. An upper shaft support bearing 103 is interposed between the outer circumferential surface of the upper spin-drying shaft 121 and the sleeve 130c, so that the upper spin-drying shaft 121 is rotatably supported. When the upper spin-drying shaft 121 rotates, frictional force between the upper spin-drying shaft 121 and the sleeve 130c is prevented from being generated by the upper shaft support bearing 103.

In addition, the lower washing shaft 115 and the lower spin-drying shaft 125 are inserted through the center of the bottom of the bearing housing 130, that is, the center of the bottom of the housing case 130a. Also, a sleeve 130d extends from the center of the bottom portion of the housing case 130a, and the lower dewatering shaft 125 passes through the sleeve 130d and is connected to the planetary gear module 140. A lower shaft support bearing 105 is provided between the sleeve 130d and the lower spinneret 125, so that the lower spinneret 125 is rotatably supported.

The drive motor is disposed below the bearing housing 130 . The driving motor includes a stator 180 generating magnetic force by applied power and a rotor 190 rotating by induced electromotive force through interaction with the stator 180 .

In detail, the stator 180 may include a stator core, an insulator 184 covering upper and lower surfaces of the stator core, and a coil 182 wound around the stator core.

The stator core includes a yoke portion 181 formed in a circular band shape, and a plurality of poles 183 extending radially from an outer edge of the yoke portion 181 and spaced apart in a circumferential direction.

The coil 182 is provided in a form of being wound multiple times around the outer circumferential surface of the pole 183 covered by the insulator 184 to prevent direct contact between the coil 182 and the magnetic core.

The stator core is formed by stacking a plurality of thin iron plates including the yoke portion 181 and the pole 183. And, it can be said that the torque of the driving motor is determined by the stacking height of the stator core and the number of turns of the coil 182 .

In addition, a fastening protrusion 185 protruding toward the center of the stator core is further included on the inner circumferential surface of the insulator. The fastening protrusion 185 is a part that fastens the stator 180 to the bearing housing 130 with a fastening member.

A fastening hole 186 is formed in the fastening protrusion 185 , and a fastening member passes through the fastening hole 186 and is inserted into the bottom surface of the bearing housing 130 .

At this time, the clutch stopper 160 is interposed between the stator 180 and the bearing housing 130, and the fastening member sequentially connects the stator 180, the clutch stopper 160, and the bearing housing 130. penetrate into

In addition, a plurality of fastening protrusions 185 may be disposed in a circumferential direction on the inner circumferential surface of the yoke part 181 . Also, the plurality of fastening protrusions 185 may be arranged at equal intervals.

5, six fastening protrusions 185 are shown as being formed on the inner circumferential surface of the yoke portion 181, but in the present invention, only three fastening protrusions 185 of the six fastening protrusions 185 pass through the fastening member. That is, the stator 180 is supported by being fastened to the bearing housing 130 at three points. According to this 3-point fastening structure, there is an advantage in that the transmission amount of vibration is reduced compared to the conventional drive unit forming the 6-point fastening structure. Specifically, when the vibration generated in the drive motor is transmitted to the bearing housing 130 through the clutch stopper 160, the number of fastening members serving as a transmission medium is reduced from 6 to 3, so the amount of vibration transmission is also reduced. will decrease

The rotor 190 is a part that rotates due to an electrode difference with the stator 180. The rotor 190 is disposed to surround the outer circumferential surface of the stator 180 . For example, the rotor 190 may have a flat cylindrical shape with an open upper surface. In addition, the stator 180 may be placed inside the rotor 190 through the open upper surface to form an outer rotor type motor.

In detail, referring to FIG. 8 , the rotor 190 includes a rotor frame 191 forming an exterior and a magnet 192 attached to an inner wall of the rotor frame 191 . Further, a step 193 supporting the lower end of the magnet 192 is formed on the inner wall of the rotor frame 191 by placing the magnet 192 thereon.

In addition, a shaft coupling part 195 for coupling with the lower washing shaft 115 and the lower spin-drying shaft 125 is provided at the center of the rotor 190 . The shaft coupling portion 195 is formed on a shaft coupling boss 197 having a shaft through hole 196 through which the lower washing shaft 115 passes, and formed outside the shaft coupling boss 197, and is a coupler ( 150) includes a meshing portion 198 engaged with the tooth surface.

The shaft coupling part 195 is fixedly coupled to the rotor 190 and rotates integrally with the rotor 190 . Further, a nut 199 is inserted into an end of the lower washing shaft 115 penetrating the shaft coupling portion 195 so that the lower washing shaft 115 is connected to the shaft coupling portion 195 and the rotor 190. It is configured to rotate as one body.

On the other hand, the planetary gear module 140 constituting the drive unit 100 is a means for increasing the torque transmitted to the pulsator 50 by decelerating the rotational force generated from the drive motor.

In detail, the planetary gear module 140 includes a planetary gear case 145, a sun gear 144 accommodated inside the planetary gear case 145, and a plurality of gears meshed with the outer circumferential surface of the sun gear 144. It includes a planetary gear 142 and a carrier 141 supporting the plurality of planetary gears 142 .

In more detail, a plurality of gear shafts 143 for inserting planetary gears are disposed in a circumferential direction in the carrier 141, and a through hole through which the gear shafts 143 pass is formed in the center of the planetary gear 142. is formed With this structure, the carrier 141 supports the plurality of planetary gears 142 and rotates along with the planetary gears 142 . A sun gear 144 is disposed at the center of the plurality of planetary gears 142, and the planetary gear 142 meshes with the sun gear 144 to rotate. At the same time, the plurality of planetary gears 142 rotate in engagement with the tooth surface formed on the inner circumferential surface of the planetary gear case 145 .

In addition, the upper end of the lower dewatering shaft 125 is fixed to the lower surface of the planetary gear case 145, so that the lower dehydration shaft 125 and the planetary gear case 145 rotate as one body. As shown, the lower spin-drying shaft 125 has a cylindrical shaft portion 125a through which the lower washing shaft 115 passes, and a direction perpendicular to the shaft portion 125a at the upper end of the shaft portion 125a. , that is, it may be made of a circular support part 125b extending in the horizontal direction. Also, the support portion 125b forms a lower surface of the planetary gear case 145 to support the sun gear 144 and the planetary gears 142 . And, the upper end of the planetary gear case 145 is connected to the upper dehydration shaft 121 as one body. In addition, a round octagonal groove may be formed in the upper portion of the carrier 141 to be matched with the lower portion of the upper washing shaft 111. Therefore, the carrier 141 rotates with the upper washing shaft 111 as one body.

The sun gear 144 is connected to the upper end of the lower washing shaft 115. In the washing mode, rotational force generated by the driving motor is transmitted through the lower washing shaft 115 to the sun gear 144, the planetary gear 142, the carrier 141, and the upper washing shaft 111 in this order. The rotational force generated by the driving motor is converted into a form in which the rotational speed decreases but the torque increases by the planetary gear module 140 and is transmitted to the upper washing shaft 111 .

In addition, the driving unit 100 further includes the coupler 150 . The coupler 150 is coupled to the outer circumferential surface of the lower spin-drying shaft 125 and can move in a vertical direction (up and down direction) along the lower draining shaft 125 . The coupler 150 moves vertically along the lower spin-drying shaft 125 and selectively transmits rotational force generated by the rotation of the rotor 190 to the lower spin-drying shaft 125 and the lower washing shaft 115. do

In detail, the coupler 150 includes a cylindrical body 151 having tooth surfaces on upper and lower surfaces. A through hole (not shown) through which the lower dewatering shaft 125 passes is formed in the center of the body 151 . A tooth surface meshing with the outer circumferential surface of the lower dewatering shaft 125 is formed on the inner circumferential surface of the through hole.

The coupler 150 descends along the lower dewatering shaft 125 in a state in which the tooth surface formed on the inner circumferential surface of the through hole is coupled with the tooth surface formed on the outer circumferential surface of the lower drain shaft 125, so that the coupler 150 The tooth surface formed on the lower surface of ) is coupled to the meshing portion 198 of the rotor 190. Then, when the coupler 150 rises, the tooth surface formed on the lower surface of the coupler 150 is separated from the meshing portion 198 of the rotor 190 .

A flange portion 152 extending in the radial direction of the body 151 is formed at an upper end of the body 151 . In addition, a stop gear 153 may be formed along the circumferential direction at an upper edge of the flange portion 152 . In addition, a connecting gear 155 engaged with the engagement portion 198 of the shaft coupling portion 195 is formed along the circumferential direction at the edge of the lower end of the body 151 .

A compression spring (not shown) is provided between the upper surface of the coupler 150 and the lower shaft support bearing 105 to push the coupler 150 downward when the washing mode is switched to the spin-drying mode. .

In addition, the driving unit 100 may further include a clutch mechanism 170 for switching the power transmission path of the driving motor to the washing shaft 110 or the spin-drying shaft 120 in response to a washing operation or a spin-drying operation. have. The clutch mechanism 170 functions to elevate the coupler 150 to the elevated position by operation of a clutch motor.

In detail, the clutch mechanism 170 includes a clutch motor (not shown) installed below the outer tub 20, a cam (not shown) coupled to a driving shaft of the clutch motor, and the bearing housing 130. It may include a lever guide 171 fixed therein, and a lever 172 that rectilinearly reciprocates under the guidance of the lever guide 171 when the clutch motor is turned on/off.

In addition, the clutch mechanism 170 is installed between the cam of the clutch motor and the lever 172, and the connecting rod 173 acts to pull the lever 172 toward the clutch motor according to the drive of the clutch motor. ), and a return spring (not shown) having one end fixed to the lever guide 171 and the other end fixed to the lever 172 to provide a return force to the lever 172.

In addition, the clutch mechanism 170 includes a mover 174 that descends on an inclined surface of the lever 172 when the clutch motor is turned on, and a plunger that moves up and down along a guide groove inside the mover 174. 175 and a buffer spring 176 provided on an outer circumferential surface of the plunger 175 may be further included.

A clutch lever 177 for substantially supporting the coupler 150 is provided at the lower end of the plunger 175 . The clutch lever 177 has one end coupled to the plunger 175 and the other end in contact with the coupler 150 to elevate the coupler 150 .

In detail, the clutch lever 177 includes a connecting portion 177a coupled to an end of the plunger 175, a support portion 177b extending from the connecting portion 177a toward the coupler 150, and the connecting portion ( A fixing pin 177c extending from both side edges of 177a) and serving as a rotational center of the clutch lever 177 may be included. The fixing pin 177c may be defined as a hinge axis.

One end of the connection part 177a is connected to the end of the plunger 175, and the support part 177b is formed at the other end. The connection part 177a and the support part 177b may be formed horizontally. The fixing pin 177c passes through the connecting portion 177a in a horizontal direction and is coupled to a clutch stopper 160 to be described later. That is, the support part 177b is hinged to the clutch stopper 160 by the fixing pin 177c and is rotatably installed by a predetermined amount.

The support part 177b protrudes toward the coupler 150 from the end of the connection part 177a and functions to elevate the coupler 150 . The support part 177b functions to press the coupler 150 to an elevated position when switching to the washing mode.

The support portion 177b extends from the end of the connection portion 177a to both sides toward the coupler 150, so that the support portion 177b and the connection portion 177a form a 'Y' shape. Also, two ends of the extended support part 177b may be arranged to surround an edge of the coupler 150 .

For example, at least a portion of the support portion 177b may cover an outer circumferential surface of the body 151 of the coupler 150 . A part of the upper surface of the support part 177b may come into contact with the lower surface of the flange part 151 of the coupler 150 . At this time, the support part 177b may be disposed in a form that hangs on the outer circumferential surface of the coupler 150, or may be fixed to a part of the outer circumferential surface of the coupler 150. That is, it should be noted that various methods other than the method suggested in the embodiment of the present invention can be proposed as a method for contacting the support part 177b with the coupler 150 .

In addition, the driving unit 100 may further include a clutch stopper 160 that limits the amount of rotation of the clutch lever 177 . The clutch stopper 160 rotates after the coupling of the coupler 150 with the rotor 190 is released so that the clutch motor, the washing shaft 110 or the spin-drying shaft 120 It serves to suppress the movement of the coupler 150 so that there is no impact on it.

The clutch stopper 160 is fixed to the lower surface of the bearing housing 130 by a fastening member.

In addition, the clutch lever 177 is rotatably hinged to the clutch stopper 160 . The clutch stopper 160 guides the clutch lever 177 to stably raise or lower the coupler 150 .

Hereinafter, the operation of the driving unit will be described in detail with reference to the drawings.

First, with reference to FIG. 6, the operation of the driving unit according to the washing cycle (or washing mode) will be described. When a washing command is input to the washing machine 1, the clutch motor of the clutch mechanism 170 is turned on. When the clutch motor is turned on, the connecting rod 173 is pulled toward the clutch motor and the lever 172 is pulled together.

When the lever 172 is pulled toward the clutch motor, the mover 174 descends along the inclined surface of the lever 172 . At this time, when the plunger 175 descends together with the mover 174, the clutch lever 177 is rotated upward by the pushing force of the plunger 175.

At this time, as the clutch lever 177 moves upward, the clutch lever 177 pushes the coupler 150 upward, so that the coupler 150 rises along the lower dehydration shaft 125. . Then, the coupling of the coupler 150 with the rotor 190 is released and the coupling with the lower dewatering shaft 125 is performed. In this case, the coupler 150 is out of the rotor 190, so that only the washing shaft 110 rotates when the rotor 190 rotates.

That is, in the washing mode, the tooth surface formed on the inner circumferential surface of the coupler 150 is engaged only with the tooth surface of the outer circumferential surface of the lower spin-drying shaft 125, and the tooth surface of the engagement portion 198 engaged with the lower washing shaft 115 is different. Since it is in a non-engaged state, the rotational force of the rotor 190 is transmitted only to the pulsator 50 through the washing shaft 110.

In detail, looking at the rotational force transmission process of the rotor 190 in the washing mode, the rotational force by the rotor 190 is transmitted through the shaft coupling boss 197 of the rotor 190 and the lower portion coupled to the shaft coupling boss 197. The washing shaft 115, the sun gear 144, the planetary gear 142, the carrier 141, and the upper washing shaft 111 are sequentially transmitted.

Meanwhile, the operation of the driving unit according to the dehydration stroke (or dehydration mode) will be described with reference to the drawings.

9 is a longitudinal cross-sectional view showing a driving unit in a dewatering mode according to an embodiment of the present invention.

Referring to FIG. 9 , when a spin-drying command is input to the washing machine 1, the clutch motor of the clutch mechanism 170 is turned off. When the clutch motor is turned off, the connecting rod 173 pulled toward the clutch motor returns to its original position, and the mover 174 ascends along the inclined surface of the lever 172. At this time, when the plunger 175 rises together with the mover 174, the clutch lever 177 rotates downward.

At this time, as the clutch lever 177 moves downward, the coupler 150 descends due to its own weight and the pushing force of the compression spring. When the coupler 150 completely descends along the lower dehydration shaft 125, the connecting gear 155 formed under the coupler 150 is engaged with the meshing portion 198 of the rotor 190.

In other words, when the coupler 150 completely descends, the coupler 150 is coupled to the rotor 190 and is also coupled to the lower spinneret 125. In this case, since the coupler 150 transmits the rotational force generated by the rotor 190 to the lower washing shaft 115 and the lower spin-drying shaft 125 at the same time, the washing shaft 110 and the spin-drying shaft 125 The high-speed rotation of 120 is performed, and dehydration proceeds.

In addition, since the washing shaft 110 and the spin-drying shaft 120 rotate as one body, when the sun gear 144 inside the planetary gear module 140 rotates with the lower washing shaft 115, the The planetary gear 142 does not rotate but revolves around the sun gear 144 while being meshed with the sun gear 144 . Therefore, the washing shaft 110 and the spin-drying shaft 120 rotate at the same rotational speed.

Hereinafter, the clutch stopper will be described in detail with reference to the drawings.

10 is a bottom perspective view of a clutch stopper according to an embodiment of the present invention, FIG. 11 is a bottom perspective view of a clutch stopper coupled with a clutch lever, FIG. 12 is a bottom view of the clutch stopper shown in FIG. 11, and FIG. 13 is It is a plan perspective view of the clutch stopper coupled with the clutch lever.

As described above, the clutch stopper 160 is disposed below the bearing housing 130, and the drive motor including the stator 180 is disposed below the clutch stopper 160. That is, the clutch stopper shown in FIGS. 10 to 12 is a perspective view showing an upside-down state, and is mounted on the bottom surface of the bearing housing 130 in the state of FIG. 13 when mounted in a washing machine.

The clutch stopper 160 is installed between the bearing housing 130 and the stator 180 to reduce transfer of vibrations caused by rotation of the stator 180 to the bearing housing 130. can do. The clutch stopper 160 is made of a plastic resin material and may be integrally injection molded.

10 to 13 , the clutch stopper 160 includes a base portion 161 having an opening 161a formed therein. The opening 161a may be understood as a hole through which the lower dewatering shaft 125 extending from the lower portion of the bearing housing 130 passes. For example, the opening 161a may be formed in a circular shape, but may also be formed in a non-circular or polygonal shape.

The base part 161 may be formed in a disk shape. In this case, the outer diameter of the base part 161 may be smaller than the inner diameter of the stator 180 .

At the inner edge of the base portion 161, an extension portion 161b extends upward in the drawing in the form of a sleeve, and extends downward when mounted on the bearing housing 130. In addition, a plurality of reinforcing parts 161c radially extend from the bottom surface (upper surface in the drawing) of the base part 161, and a plurality of reinforcing parts 161c may be spaced apart from each other in the circumferential direction of the opening 161a. . Further, the reinforcing part 161c connects the outer circumferential surface of the extension part 161b and the bottom surface of the base part 161 to improve the strength of the base part 161 and to distribute stress.

In addition, a plurality of main flanges 161d and a plurality of dummy flanges 161e may protrude from an outer edge of the base portion 161 . The plurality of main flanges 161d and the plurality of dummy flanges 161e may be alternately spaced apart from each other in the circumferential direction of the base part 161 . And, for example, three main flanges 161d and three dummy flanges 161e may be provided, but is not limited thereto.

In addition, a plurality of inner flanges 161f may be formed extending from the inner edge of the base portion 161 .

A fastening boss 162 to be fixed to the bearing housing 130 extends from the lower surface of the main flange 161d. In addition, the fastening member passing through the stator 180 penetrates the fastening boss 162 and is fastened to the bearing housing 130, so that the bearing housing 130, the clutch stopper 160 and the stator 180 are fixed together.

As the fastening boss 162 extends a predetermined length from the bottom surface of the base part 161 , the stator 180 contacts only the end of the fastening boss 162 , thereby minimizing transmission of vibration. And, in order to minimize the contact area where the upper surface of the base part 161 comes into contact with the lower surface of the bearing housing 130, a sleeve is placed on the upper surface of the base part 161 corresponding to the upper surface of the fastening boss 162. may protrude about 1 mm. Also, the fastening member may pass through the sleeve and be fixed to the lower surface of the bearing housing 130 .

According to this configuration, the contact area where the clutch stopper 160 and the bearing housing 130 come into contact is minimized, so that vibration generated from the drive motor is transmitted to the bearing housing 130 side through the clutch stopper 160. can be minimized.

While the conventional stator is supported by being fastened to the clutch stopper at 6 points, the stator 180 of the present invention is supported by being fastened to the clutch stopper 160 at 3 points. That is, in the case of the present invention, since the vibration generated in the stator 180 is transmitted to the clutch stopper 160 is reduced, there is an advantage in that noise is greatly reduced.

In addition, in the conventional case, the stator is fastened by directly contacting the base surface of the clutch stopper, whereas in the present invention, the stator 180 is fastened to the fastening boss 162 protruding at a predetermined height from the base portion 161 Therefore, since vibration generated in the stator 180 is prevented from being directly transferred to the clutch stopper 160, there is an advantage in reducing vibration noise as a result.

In addition, in the present invention, a sleeve pipe 163 is inserted into the fastening boss 162 to improve the fastening force of the fastening member. The sleeve tube 163 may be inserted into the fastening boss 162 by insert injection.

The sleeve pipe 163 is provided in a cylindrical shape with an empty inside and is made of a metal material. The sleeve pipe 163 is substantially penetrated by a fastening member. The sleeve pipe 163 is inserted into the through hole of the fastening boss 162 to improve the strength of the fastening boss 162 and the fastening force of the fastening member. That is, even if the fastening force is increased by tightening the fastening member passing through the fastening boss 162 to an appropriate level or higher, it is possible to prevent the fastening boss 162 from being damaged.

More specifically, the fastening boss 162 is formed of a plastic material. In this case, the strength of the fastening boss 162 and the fastening force of the fastening member may decrease due to expansion or contraction of the plastic according to temperature change. Therefore, in the present invention, in order to prevent deterioration in strength and deterioration in clamping force that may occur due to temperature changes in the plastic material, a sleeve pipe made of metal is applied so that the clamping force can be maintained constant.

In addition, the base part 161 is provided with a plurality of guide parts 164 for facilitating position alignment between mating structures (eg, stators, bearing housings, etc.). The guide part 164 may be understood as a structure that guides positional alignment for assembly (engagement) between the clutch stopper 160, the bearing housing 130, and/or the stator 180.

In detail, the guide part 164 may include a lower guide part 164a extending from the lower surface of the base part 161 and an upper guide part 164b extending from the upper surface of the base part 161. have.

The lower guide portion 164a may be formed on a lower surface of the main flange 161d and may be formed on a side of the fastening boss 162 .

In this embodiment, the lower guide portion 164a may be disposed adjacent to the fastening boss 162 to be connected to it. According to this configuration, position alignment for assembly between the clutch stopper 160 and the stator 180 can be easily achieved by the lower guide part 164a. To this end, a hole or groove into which the lower guide part 164a is inserted is formed at the inner edge of the stator 180 . .

The upper guide portion 164b may extend from an upper surface of the dummy flange 161e. Therefore, the upper guide part 164b can easily inform the correct position for assembly between the clutch stopper 160 and the bearing housing 130 .

Six fastening holes 133 are formed on the bottom surface of the bearing housing 130 of the present invention as well as the conventional bearing housing, and six fastening protrusions are formed on the inner edge of the stator 180 of the present invention as well as the conventional stator ( 185) is protrudingly formed. In addition, a fastening hole 186 is formed in each fastening protrusion 185 .

The fastening member passing through the fastening hole 186 passes through the fastening boss 162 and is inserted into the fastening hole 133 formed on the bottom of the bearing housing 130 .

Here, in the clutch stopper 160 according to the embodiment of the present invention, unlike the structure of the conventional clutch stopper, only three fastening bosses 162 function as connecting parts connecting the stator 180 and the bearing housing 130 And, the three upper guide parts 164b function as a shielding means for shielding the remaining three fastening holes 133.

That is, the three upper guide parts 164b can be inserted into the three fastening holes 133 of the six fastening holes 133, thereby facilitating position alignment of the clutch stopper 160. As a result, it can be said that the stator 180 is supported at three points on the lower surface of the bearing housing 130 .

In addition, as the upper guide part 164b is inserted into the fastening hole 133 formed on the bottom surface of the bearing housing 130, the assembler confuses six through holes formed on the inner edge of the stator 180 ( 185), even if a fastening member is inserted into through-holes other than the through-holes corresponding to the fastening boss 162, the fastening member is blocked by the dummy flange 161e and is no longer inserted, so that erroneous assembly can be prevented. There are advantages to

In addition, an auxiliary coupling part 166 may be further formed on the upper surface of the inner flange 161f. Further, when the clutch stopper 160 is coupled to the bottom surface of the bearing housing 130, a fastening hole may be formed in the bottom surface of the bearing housing 130 corresponding to the auxiliary coupling part 166. Also, as the fastening member passes through the auxiliary coupling part 166 and is inserted into the bearing housing 130 , the clutch stopper 160 is supported on the bottom surface of the bearing housing 130 at 6 points. Therefore, the clutch stopper 160 to which the stator 180 is coupled to the bottom surface can be stably coupled to and supported by the bottom surface of the bearing housing 130 .

The auxiliary coupling part 166 may also protrude about 1 mm from the upper surface of the inner flange 161f to minimize the contact area between the upper surface of the base part 161 and the lower surface of the bearing housing 130. have.

In addition, a seating portion 167 on which the clutch lever 177 is seated is further formed on the bottom surface (upper surface in FIG. 10 ) of the base portion 161 . The seating portion 167 is formed to have a predetermined width so that the clutch lever 177 for moving the coupler 150 up and down is located.

Hinge coupling portions 168 to which the clutch lever 177 is rotatably coupled are formed at left and right edges of the seating portion 167 . In detail, the hinge coupling part 168 is formed to further extend downward from both side ends of the seating part 167 . At the end of the hinge coupling part 168, a seating groove 168a into which the fixing pin 177c of the clutch lever 177 is seated and a hinge hole 168b into which the fixing pin 177c is inserted are formed. .

In addition, one or a plurality of stopper ribs 169 may protrude from the seating portion 167 to maintain a constant rotation amount (rotation angle) of the clutch lever 177 . In this embodiment, a pair of stopper ribs 169 protrudes will be described as an example. The stopper rib 169 substantially contacts the upper surface of the connecting portion 177a constituting the clutch lever 177 . That is, the bottom surface of the stopper rib 169 is at least partially in contact with the top surface of the connection portion 177a.

An end of the stopper rib 169 may be inclined upward toward the center of the clutch stopper 160 . That is, the stopper rib 169 may be formed to have an inclined surface that slopes upward from the outside to the inside.

14 is an enlarged cross-sectional view showing part A of FIG. 1, and FIG. 15 is a perspective view showing the base of the washing machine equipped with the anti-shattering ribs.

Referring to FIGS. 14 and 15 , in order to perform the washing mode, wash water is first supplied to the outer tub 20 .

In detail, wash water supplied from a water supply source passes through a water supply hose extending to the top rear end of the washing machine (see top right corner of the cross-sectional view of FIG. After passing through, it is supplied to the outer shell (20). Here, a water supply valve is provided on a water supply passage through which wash water is supplied, and a sensor for detecting a water level is provided in the outer tub 20 .

At this time, if the water supply valve or the sensor for detecting the water level is out of order, the amount of wash water supplied may not be controlled, and as a result, the wash water may overflow to the upper end of the outer tub 20 .

Wash water overflowing the upper end of the outer tub 20 flows along the outer circumferential surface of the outer tub 20 and falls to the base 12 . After colliding with the upper surface of the base 12, the washing water falling to the base 12 may be scattered and introduced into the driving motor.

Meanwhile, referring to FIG. 15 , an opening 123 may be formed inside the base 12, and a plurality of horizontal lattice ribs 121 and a plurality of vertical lattice ribs 122 may be formed on the upper surface of the base 12. ) may be formed by crossing.

When the washing water falling to the upper surface of the base 12 collides with the horizontal lattice ribs 121 or the vertical lattice ribs 122, some of the washing water colliding with it may be reflected and not flow toward the driving motor. However, it is not possible to completely prevent washing water from flowing into the drive motor after hitting the horizontal lattice ribs 121 and the vertical lattice ribs 122 .

In this way, in order to prevent scattered washing water from flowing into the driving motor, it is necessary to install the scattering prevention rib 300. In detail, as shown in FIG. 14 , the scattering prevention rib 300 may be placed at a point where an outer surface coincides with a vertical line passing through the outer circumferential surface of the outer tub 200 . Alternatively, the scattering prevention rib 300 may be placed at a point spaced apart by a predetermined distance from a point where a vertical line passing through the outer circumferential surface of the outer tub 20 meets the upper surface of the base 12 toward the center of the base 12. have.

If the formation position of the anti-scattering rib 300 is explained in another way, it is formed at any point on the upper surface of the base 12 that corresponds directly below the outer edge of the bottom of the outer shell 20, or at any point above. It may be formed at a point spaced apart in the center direction of the base 12 from.

Looking at the bottom structure of the outer tub 20, as shown in FIG. 2, the outer tub 20 prevents water flowing down the outer circumferential surface of the outer tub 20 from flowing toward the center of the bottom portion of the outer tub 20. ) is surrounded by a circular extension rib at the outermost edge of the bottom portion. Also, the circular extension rib may be defined as an outer edge of the bottom portion of the outer shell 20 . Accordingly, the washing water falls toward the base 12 from the circular extension ribs due to gravity and does not flow toward the center of the bottom of the outer tub 20 .

Then, even if the washing water flowing down the surface of the outer tub 20 and falling to the base 12 is scattered on the bottom of the base 12, it is prevented from flowing into the driving motor by hitting the scattering prevention rib 300. can do.

In addition, the anti-scattering rib 300 may extend to a predetermined length only on a portion of the upper surface of the base 12 as shown, but is not limited thereto. For example, the anti-scattering rib 300 may continuously extend along the outer diameter of the outer tub 20 to form a circular or rectangular sleeve following the shape of the opening 123 . Also, the anti-scattering ribs 300 may be formed longer than at least the heights of the horizontal lattice ribs 121 and the vertical lattice ribs 122 .

16 is a partial cross-sectional view of a washing machine having a base according to another embodiment of the present invention, FIG. 17 is a plan perspective view of the base according to another embodiment, and FIG. 18 is an enlarged view of part B of FIG. 17 .

16 to 18, the base 12a according to another embodiment of the present invention has an opening 123a formed therein, and a plurality of horizontal lattice ribs 121a and vertical lattice ribs 122a on the upper surface. Is formed by crossing, while the structure of the base 12 according to the previous embodiment is the same as the structure of the base 12 according to the previous embodiment in that the anti-scattering rib 300 is formed on the upper surface of the base 12a, a plurality of stepped portions are formed on the outer edge There is a slight difference in In addition, a structure in which a separate base plate 60 is mounted on the opening 123a and a plurality of drain holes 601 are formed in the base plate 60 can also be proposed.

In detail, the base 12a according to the present embodiment includes a first vertical portion 125 extending upward from an outer edge, and a first horizontal portion bent in the horizontal direction at the lower end of the first vertical portion 125 ( 126), a second vertical portion 127 bent downward at the end of the first horizontal portion 125, and a second horizontal portion 128 bent horizontally at the lower end of the second vertical portion 127. ) may be included. The lower end of the cabinet 10 is in close contact with the outer surface of the first vertical part.

A stepped portion formed by the first vertical portion 125 and the first horizontal portion 126 may be defined as a first stepped portion, and a stepped portion formed by the second vertical portion 127 and the second horizontal portion 128 may be defined as a first stepped portion. It can be defined as 2 steps. Here, the vertical portion should be interpreted as including not only a vertical plane that forms 90 degrees with the horizontal plane, but also a case where it is inclined at a predetermined angle from the vertical plane and extends in the vertical direction. It should be construed as broadly encompassing even the case where it extends at an angular inclination.

In addition, it should be noted that the number of stepped portions is not limited to the two presented, and more than that is possible.

Meanwhile, the inner edge rib 129 may extend to a predetermined length along the edge of the opening 123a and may extend upward to a predetermined height.

In addition, the scattering prevention rib 300 extends higher than the first horizontal portion 126 of the first stepped portion to prevent wash water falling to and scattering from the first stepped portion from flowing into the driving motor. Specifically, it is preferable that the height of the upper end of the scattering prevention rib 300 is higher than the scattering height of washing water splashed against the first horizontal portion 123 .

In addition, the anti-scattering rib 300 may be formed on a horizontal part constituting the innermost step part among the step parts that the wash water flowing along the outer circumferential surface of the tub directly falls and collides with. In this embodiment, since the second stepped portion is the innermost stepped portion directly hit by the water flowing along the outer circumferential surface of the tub, the scattering prevention rib 300 may be mounted on the upper surface of the second horizontal portion 128. have.

As in the previous embodiment, the anti-scattering rib 300 according to this embodiment can also be formed to continuously extend from the upper surface of the base 12a along the opening 123a, as shown in FIG. , formed on at least some of the four sides of the base 12a, and may be spaced apart from each other.

Alternatively, it is also possible to extend roundly along the outer edge of the outer tub 20 in the form of a circular sleeve.

On the other hand, since washing water that overflows in the plurality of spaces formed by the plurality of horizontal grid ribs 121a and vertical grid ribs 122a may not be drained, it is partitioned by the grid ribs 121a and 122a. A drainage hole 124 may be formed at the bottom of each of the spaces to be. It should be noted that such a drainage hole structure may be equally formed in the base 12 according to the previous embodiment.

Hereinafter, an embodiment in which the scattering prevention structure is formed in the outer shell or the driving unit, in addition to the embodiments in which the scattering prevention structure is provided on the base in the form of a rib, will be described. In addition, the anti-scattering structure may be formed on at least one side of the base, the outer shell, and the driving unit, and it should be noted that a number of possible combinations are included in the scope of the present invention. In other words, the anti-scattering structure according to the embodiment of the present invention may be formed on only one side of the base, the outer shell, and the driving unit, and may be formed only on two of the base, the outer shell, and the driving unit, and the base, the outer shell It should be noted that it may be formed in both the , and the driving unit.

19 is a side view showing an outer tub of a washing machine equipped with a scattering prevention structure according to another embodiment of the present invention, and FIG. 20 is a bottom view of the outer tub.

19 and 20, the anti-scattering structure according to the present embodiment is characterized in that it is provided on the bottom surface of the outer tub 20, rather than being formed on the bases 12 and 12a.

In detail, the anti-scattering structure according to the present embodiment may include a so-called water guide 400 having a predetermined width and installed on the lower surface of the outer tub 20 to surround the driving unit.

In more detail, the water guide 400 may be provided as a plastic member in the form of a flexible sheet member or an injection molding material having a predetermined thickness. When the water guide 400 is provided as a sheet member, an adhesive such as double-sided tape is provided on the upper edge of the rear surface of the water guide 400 to extend from the bottom surface of the outer tub 20, and the outer tub 20 It may be attached to a rib extending in the circumferential direction of the

In addition, when the water guide 400 is provided in the form of a plastic injection molding, a screw fastening hole or a fastening boss is formed at a portion coupled to the bottom surface of the outer tub 20 so that the fastening member is It may be inserted into the lower surface of the outer tub 20 through a fastening hole or a fastening boss.

In addition, the vertical width (or vertical extension length) of the water guide 400 may be formed to a length capable of shielding the upper surface of the rotor 190 . If the width of the water guide 400 is smaller than the separation distance between the bottom of the outer tub 20 and the rotor 190, the washing water still scattered toward the stator 180 through the remaining gap. Since it can flow in, the water guide 400 can extend downward to a point corresponding to the upper end of the rotor 190 or to a point lower than that.

On the other hand, the water guide 400 may be wrapped around the circumferential direction of the outer shell from the bottom surface of the outer shell 20 to form a complete cylindrical sleeve, or as shown in FIG. 20, only a part of the bottom surface of the outer shell 20 has an arc It can be wrapped around the shape.

21 is a partial perspective view showing an outer tub and a driving part of a washing machine equipped with a scattering prevention structure according to another embodiment of the present invention, and FIG. 22 is a perspective view showing the scattering prevention structure.

Referring to FIGS. 21 and 22 , the scattering prevention structure according to the present embodiment is characterized in that it is provided in the clutch stopper 160 constituting the driving unit 100 .

In detail, the clutch stopper 160 is a member interposed between the stator 180 and the bottom surface of the bearing housing 130 to indirectly connect the stator 180 to the bearing housing 130. Since the structure and function of the servo clutch stopper 160 have already been described in detail above, redundant description thereof will be omitted.

In more detail, since the clutch stopper 160 is placed above the upper surface of the stator 180, a scattering prevention structure can be extended from the edge of the clutch stopper 160, and this scattering prevention structure is formed on the water cover 500. ) can be defined.

The water cover 500 may extend radially from the edge of the clutch stopper 160 by a predetermined length (which may be defined as the width of the water cover), and may extend a predetermined length (water cover) in a circumferential direction of the clutch stopper 160. It can be extended as much as can be defined as the length of the cover).

The outer diameter of the water cover 500 is formed to a length corresponding to at least the outer diameter of the rotor 190 or larger than the outer diameter of the rotor 190, so that the water cover 500 falls from the outer tub 20 or the base 12 , 12a) may block the inflow of washing water into the stator 180.

As shown, the water cover 500 may not be formed in a portion where the clutch lever is provided in order to avoid interference with the clutch lever, and in a portion where the clutch motor is provided in order to avoid interference with the clutch motor. A hole may be formed.

In addition, in order to allow washing water falling on the upper surface of the water cover 500 to fall to the bases 12 and 12a, the water cover 500 may be inclined downward from the center in a radial direction.

In addition, the water cover 500 may be injection molded as one body with the clutch stopper 160 or may be provided as a separate member and coupled to the clutch stopper 160 by a fastening member.

Claims (17)

A cabinet having an open upper surface and forming an outer shape;
a top cover covering the upper surface of the cabinet and having a laundry inlet formed therein;
a door coupled to the top cover to open and close the laundry inlet;
a base coupled to a lower end of the cabinet to support the cabinet;
an outer tub accommodated inside the cabinet and filled with washing water;
an inner tub accommodated inside the outer tub and into which laundry is put;
a pulsator mounted on the bottom of the tub to forcibly flow wash water and laundry;
a driving unit mounted on the bottom of the outer tub to provide rotational force to the pulsator and the inner tub; and
A water guide provided at an outer edge of a bottom part constituting the outer tub to prevent wash water flowing down an outer wall of the outer tub from penetrating into the driving unit,
the driving unit,
A bearing housing fixed to the bottom of the outer shell and accommodating a planetary gear therein;
A stator coupled to the bearing housing at a position spaced downward from the bottom surface of the bearing housing;
A rotor accommodating the stator therein and rotating around the stator;
A washing shaft connecting the center of the rotor with the planetary gear and the pulsator;
The washing shaft is inserted therein and includes a spin-drying shaft connecting the planetary gear and the inner tub,
The water guide,
A predetermined length extends from the bottom of the outer shell in the circumferential direction of the outer shell,
The washing machine according to claim 1 , wherein the washing machine extends downward from at least the bottom of the outer tub to a point corresponding to the top surface of the rotor or a point lower than the top surface of the rotor. According to claim 1,
Further comprising a scattering prevention rib extending upward from an upper surface of the base to prevent wash water overflowing through the top of the outer tub and hitting the base and scattering, so that the washing water does not flow into the driving unit;
The scattering prevention rib is formed at a point directly below an outer edge of the bottom portion forming the outer tub or at a point spaced apart by a predetermined distance from the point toward the center of the base. According to claim 2,
The scattering prevention rib is a washing machine, characterized in that extending a predetermined length in the circumferential direction of the outer tub. According to claim 2,
A plurality of horizontal lattice ribs and vertical lattice ribs are formed on the upper surface of the base,
The washing machine, characterized in that the anti-shattering ribs extend higher than the heights of the plurality of horizontal lattice and vertical lattice ribs. According to claim 4,
A washing machine, characterized in that drain holes are formed at the bottom of each of the spaces partitioned by the plurality of horizontal lattice ribs and vertical lattice ribs. According to any one of claims 2 to 4,
One or a plurality of stepped portions are formed on the outer edge of the base,
Each of the stepped portions is composed of a vertical portion and a horizontal portion,
The scattering prevention rib is a washing machine, characterized in that formed in the horizontal portion. According to claim 6,
The washing machine according to claim 1 , wherein the scattering prevention rib is formed on a horizontal portion constituting an innermost step portion among stepped portions to which wash water overflowing from the outer tub falls and collides with each other. According to claim 7,
The scattering prevention rib is a washing machine, characterized in that extending higher than the horizontal portion constituting the outermost stepped portion. delete According to claim 1,
The washing machine according to claim 1 , wherein the water guide includes a bendable sheet member and is attached to the outer tub by an adhesive member. According to claim 1,
The washing machine characterized in that the water guide is provided in the form of a plastic injection molding and is coupled to the lower end of the outer tub by a fastening member. delete delete According to claim 1,
the driving unit,
A clutch stopper fixed to the bottom surface of the bearing housing;
Further comprising a water cover provided on an outer edge of the clutch stopper,
The washing machine, characterized in that the water cover shields the upper portion of the stator and the rotor. 15. The method of claim 14,
The outer diameter of the water cover is at least equal to or larger than the outer diameter of the rotor. 15. The method of claim 14,
The washing machine, characterized in that the water cover is formed to be inclined downward from the center to the outer edge. 15. The method of claim 14,
The washing machine according to claim 1 , wherein the water cover is injection molded integrally with the clutch stopper or is provided as a separate member and coupled to the clutch stopper by a fastening member.

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