KR101729525B1 - Top loading type washing machine - Google Patents

Abstract

A top loading washing machine according to the present invention includes: a drum for loading laundry laid up and down; A drive module for rotating the drum through a drive shaft; An inner pulsator disposed on the drum, positioned on the driving shaft and rotated by receiving a rotational force from the driving module; An outer pulser which is disposed on the drum, rotates on an outer side of the inner pulsator, and receives rotation force from the driving module and rotates in an opposite direction to the inner pulsator; And a gear box disposed between the drive module and the drum and connected to the drive shaft to receive a rotational force and to rotate the inner pulsator and the outer pulsizer in directions opposite to each other, A sun gear connected and rotated; A plurality of planetary gears meshing with the sun gear and revolving along an outer circumferential surface of the sun gear while being rotated; A ring gear rotatably engaged with the planetary gears; A ring gear shaft formed on the ring gear and coupled to the inner pulsator; A carrier that provides the axis of rotation of the planet gears, connects the planet gears, and rotates together when the planet gears are idle; And a gear housing to which the carrier is fixed, the inner pearl shaver being connected to the ring gear shaft and rotated, and the outer pearl shaker is connected to the gear housing and rotated.
The top loading washing machine according to the present invention is advantageous in that the inner pulsator and the outer pulsator are rotated in opposite directions, so that the washing power is excellent and the rotation speed of the inner pulsator and the outer pulsator is variable according to the load of the laundry.

Description

Top Loading Washing Machine {TOP LOADING TYPE WASHING MACHINE}

The present invention relates to a top loading washing machine.

Generally, a washing machine is an apparatus for washing clothes using an emulsifying action of a detergent, a water flow action caused by the rotation of the washing tub or the laundry blades, and a shock action applied by the laundry blades, and uses laundry detergent and water Washing, rinsing or dewatering process is performed so as to remove the contamination on the surface (hereinafter referred to as "foam").

In the top loading washing machine according to the related art, a pulsator is disposed inside the drum.

The pulsator can be rotated independently of the drum. Conventionally, the pulsator can be rotated together with the drum or rotated in the opposite direction to the drum.

However, when the drum and pulsator are rotated in opposite directions, the power consumption is large, but the washing power is not as high as the consumed power.

Korean Patent Publication No. 10-2014-0017476

A problem to be solved by the present invention is to provide a top loading washing machine provided with two pulsators.

Another object of the present invention is to provide a top loading washer equipped with an inner pulsator and an outer pulsator.

A further object of the present invention is to provide a top loading washer in which the inner pulsator and the outer pulsator can be rotated in opposite directions to each other.

A further object of the present invention is to provide a top loading washing machine with low power consumption in the structure in which the inner pulsator and the outer pulsator are operated.

Another object of the present invention is to provide a top loading washing machine in which the speed of the inner pulsator and the outer pulsator can be changed according to the load of laundry.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

A top loading washing machine according to the present invention includes: a drum for loading laundry laid up and down; A drive module for rotating the drum through a drive shaft; An inner pulsator disposed on the drum, positioned on the driving shaft and rotated by receiving a rotational force from the driving module; An outer pulser which is disposed on the drum, rotates on an outer side of the inner pulsator, and receives rotation force from the driving module and rotates in an opposite direction to the inner pulsator; And a gear box disposed between the driving module and the drum and connected to the driving shaft to receive rotational force and rotate the inner pulsator and the outer pulsizer in opposite directions,

The gear box includes a sun gear coupled to the drive shaft and rotated; A plurality of planetary gears meshing with the sun gear and revolving along an outer circumferential surface of the sun gear while being rotated; A ring gear rotatably engaged with the planetary gears; A ring gear shaft formed on the ring gear and coupled to the inner pulsator; A carrier that provides the axis of rotation of the planet gears, connects the planet gears and rotates together when the planet gears are idle; And a gear housing to which the carrier is fixed, the inner pearl shaver being connected to the ring gear shaft and rotated, and the outer pearl shaker is connected to the gear housing and rotated.

The outer pear sheathe is formed with an inner rotating space, and the inner pear sheeter is positioned in the rotating space and rotated.

And a pulsator base for covering a lower side of the rotation space.

The planetary gear, the carrier and the ring gear other than the sun gear may be arranged in a free state.

The sun gear is formed with a sun gear hollow therein, and the drive shaft can be inserted and coupled to the sun gear hollow.

The carrier may support the sun gear.

A bearing may be disposed between the carrier and the sun gear.

The gear housing includes: a housing body coupled to the carrier and coupled with the outer pulsator; A housing space formed in the housing body and into which the ring gear is inserted; And a ring gear shaft hole formed in the housing body and through which the ring gear shaft is passed.

Wherein the carrier comprises: an upper carrier body disposed above the sun gear and the planetary gears; A lower carrier body disposed below the sun gear and the planetary gears and supporting the sun gear and the planetary gears; And a planetary gear shaft formed on at least one of the upper carrier body and the lower carrier body and providing a rotation axis of the planetary gear.

At least one of the upper carrier body and the lower carrier body may be formed with a sun gear groove into which the sun gear is inserted, and a bearing may be disposed in the sun gear groove.

Wherein the upper carrier body is formed with an upper sun gear groove into which an upper part of the sun gear is inserted, and a lower sun gear groove into which a lower part of the sun gear is inserted is formed in the lower carrier body, and the upper sun gear groove and the lower sun gear groove Bearings for reducing the friction of the sun gear can be arranged, respectively.

The gear housing includes: a housing body coupled with the outer pulsator and coupled with the lower carrier body; A housing space formed in the housing body and into which the ring gear is inserted; And a ring gear shaft hole formed in the housing body and through which the ring gear shaft is passed.

The housing space and the ring gear shaft hole are formed to communicate with each other, the ring gear is inserted into the housing space, and the ring gear shaft can be coupled to the inner pulsator through the ring gear shaft hole.

A housing locking protrusion may be formed on the outer side of the housing body, and the housing locking protrusion may be coupled with the outer pulsator.

The ring gear is disposed between the gear housing and the carrier and can be rotated in a direction opposite to the carrier.

The ring gear includes a ring gear body having a ring gear space formed therein; And a ring gear tooth formed on an inner circumferential surface of the ring gear body and engaged with the planetary gears, wherein the ring gear shaft is formed so as to protrude upward from the ring gear body.

A bearing may be disposed between the ring gear shaft and the gear housing.

A bearing may be disposed between the ring gear body and the carrier.

A top loading washing machine according to the present invention includes: a drum for loading laundry laid up and down; A drive module for rotating the drum through a drive shaft; An inner pulsator disposed on the drum, positioned on the driving shaft and rotated by receiving a rotational force from the driving module; An outer pulser which is disposed on the drum, rotates on an outer side of the inner pulsator, and receives rotation force from the driving module and rotates in an opposite direction to the inner pulsator; And a gear box disposed between the driving module and the drum and connected to the driving shaft to receive rotational force and rotate the inner pulsator and the outer pulsizer in opposite directions,

The gear box includes a sun gear coupled to the drive shaft and rotated; A plurality of planetary gears meshing with the sun gear and revolving along an outer circumferential surface of the sun gear while being rotated; A ring gear coupled to the planetary gears and rotated to transmit rotational force to the inner pulsator; A carrier formed on the ring gear, for providing an axis of rotation of the planetary gears, connecting the planetary gears, rotating together when the planetary gears are idle, and transmitting torque to the outer pulsator; And a gear housing to which the carrier is fixed,

The ring gear includes a ring gear body having a ring gear space formed therein; A ring gear tooth formed on an inner circumferential surface of the ring gear body and meshing with the planetary gears; And a ring gear shaft protruding from the ring gear body and coupled to the inner pulsator, wherein the gear housing includes: a housing body coupled to the carrier and coupled to the outer pulsator; And a ring gear shaft hole formed in the housing body and through which the ring gear shaft passes,

The carrier includes an upper carrier body disposed below the ring gear and disposed above the sun gear and the planetary gears; A lower carrier body disposed below the sun gear and the planetary gears and supporting the sun gear and the planet gears and coupled to the gear housing; And a planetary gear shaft formed on the lower carrier body and providing an axis of rotation of the planetary gear.

The top loading washing machine according to the present invention has an advantage of excellent washing power because the inner pulsator and the outer pulsator are rotated in opposite directions.

The top loading washing machine according to the present invention has an advantage that the rotation speed of the inner pulsator and the outer pulsator varies according to the load of the laundry.

The top loading washing machine according to the present invention is advantageous in that the rotational speed of the inner pulsator and the outer pulsator varies according to load of the laundry, so that power consumption can be reduced.

The top loading washing machine according to the present invention is advantageous in that the rotation speed of the inner pulsator and the outer pulsator is reduced when the load is high, thereby reducing damage to the laundry.

1 is a sectional view showing the inside of a washing machine according to a first embodiment of the present invention.
2 is a cross-sectional view of the dual pulsator shown in Fig.
3 is an exploded perspective view of the dual pulsator shown in Fig.
Fig. 4 is an exploded perspective view of the gear box shown in Fig. 2; Fig.
5 is a sectional view of the gear box shown in Fig.
6 is a graph of the speed of the planetary gear assembly according to the first embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

The top loading washing machine according to the present embodiment will be described with reference to FIG.

The washing machine according to the present embodiment includes a casing 10 forming an outer appearance and a control module 20 installed in the casing 10.

The control module 20 includes operation keys for receiving operation force from a user, and a display for displaying information on an operating state of the washing machine.

The washing machine includes a tub 30 disposed inside the casing 10 and storing wash water therein, a drum 40 disposed inside the tub 30 to store laundry and washing the laundry, A water supply module 60 for supplying washing water to the drum 40 and a water supply module 60 for supplying washing water to the drum 40. The water supply module 60 is installed on the drum 40 to rotate the drum 40 to wash the laundry, A suspension module 80 for reducing or buffering the vibration generated in the tub 30 and a drain module 40 disposed in the drum 40 and adapted to receive the washing water from the driving module 50 And a dual pulsator 90 rotated by receiving a driving force.

The dual pulsator 90 is composed of an inner pulsator 92 and an outer pulsator 94. The axis centers of the pulsators 92 and 94 are positioned on the driving axis of the driving module 50. The pulsators 92 and 94 are rotated in opposite directions to each other.

The casing 10 includes a main body 12 disposed in the tub 30 and the drum 40, a top cover 14 disposed on the main body 12, And a door 7 for opening and closing the inside of the casing 10.

The control module 20 includes operation buttons and dials for receiving operation force from a user.

The control module 20 is provided with a display unit (not shown) for transmitting various information of the washing machine to the user. In the present embodiment, the display unit is disposed on the top cover 14.

The tub 30 is connected to the water supply module 60 and receives the wash water from the water supply module 60 and stores the water.

The tub 30 is connected to the drainage module 70 and the drainage module 70 can discharge the washing water stored in the tub 30 to the outside.

The drum (40) is disposed inside the tub (30). The drum 40 receives the driving force from the driving module 50 and is rotated.

The drum 40 includes a drum body 42 formed in a cylindrical shape and a drum base 44 coupled to the lower side of the drum body 42.

The drum base (44) is provided with a hub (46). The drive module 50 may selectively transmit a driving force to the hub 46.

The drum (40) is configured to rotate relative to the tub (30) in a forward or reverse direction.

In the present embodiment, the water supply module 60 includes a water supply valve 61 and a water supply flow path 62 disposed in the top cover 12.

The drainage module 70 includes a drain valve 71 connected to the tub 30 and a drainage passage 72 connected to the drainage valve 71.

The suspension module 80 is connected to the tub 30 and reduces vibration generated in the tub 30 by using at least one of an elastic force and an attenuating force.

In the present embodiment, the suspension module 80 is disposed between the casing 10 and the tub 30. The suspension module 80 supports the lower side of the tub 30 and is suspended from the top cover 14. [

2 to 5, the structure of the dual pulse device 90 according to the present embodiment will be described.

The driving module 50 includes a motor 52 disposed below the tub 30, a driving shaft 54 connected to the drum 40 through the tub 30, And a gear box (100) for transmitting the driving force of the dual pulsator (90) to the dual pulsator (90).

The drive shaft (54) is disposed through the hub (46).

The drive shaft 54 may be selectively connected to the hub 46 of the drum 40. So that only the drum 40 can be rotated by the drive module 50.

The drive shaft 54 may be selectively connected to the gear box 100.

When the driving shaft 54 and the gear box 100 are connected, the dual pulsator 90 may be rotated.

The dual pulsator 90 is positioned above the hub 46.

The dual pulsator 90 includes an inner pulsator 92 and an outer pulsator 94. The inner pulsator 92 is positioned inside the outer pulsator 94.

The inner pulsator 92 is formed in a circular shape when viewed in a plan view.

The outer pulsator 94 is formed in a ring shape when viewed in a plan view.

A rotating space 95 in which the inner pulsator 92 rotates is formed inside the outer pulsator 94.

The inner pulsator 92 and the outer pulsator 94 may be relatively rotated in different directions.

In this embodiment, the dual pulsator 90 includes a pulsator base 96 disposed below the inner pulsator 92. The pulsator base 96 and the outer pulsator 94 are defined as outer assemblies.

The inner pulsator 92 is positioned above the outer pulsator 94. The ear pulsator 92 is rotated on the outer pulsator 94.

The inner pulsator 92 may be formed with a washing blade 91 protruding upward. In the present embodiment, three washing wings 91 are arranged at intervals of 120 degrees when viewed in a plan view.

The outer pulsator 94 may also have a washing blade 93 protruding upward. When viewed in a plan view, the washing vanes 93 are arranged at equal intervals.

The inner pulsator 92 is disposed at the center of the outer pulsator 94 when viewed in plan. The center of rotation of the inner pulsator 92 and the outer pulsator 94 is positioned on the driving shaft 54.

An installation hole 95 is formed on the inner side of the outer pulsator 94. An installation groove 97 is formed at the edge of the installation hole 95 of the outer pulsator 94. A part of the inner pulsator 92 is inserted into the installation groove 97.

The pulsator base 96 is positioned below the mounting hole 95. The pulsator base 96 covers the mounting hole 95. The pulsator base 96 is fixed to the outer pulsator 94.

The gear box 100 of the drive module 50 is positioned below the pulser base 96. The gear box 100 is connected to the inner pulser 92 through the pulser base 96.

The gear box 100 is connected to the motor 52 of the driving module 50 to receive driving force. A drive shaft (54) of the drive module (50) is connected to the gear box (100).

The gear box 100 is connected to the inner pulsator 92 and the outer pulsator 94, respectively. The gear box 100 may be selectively connected to the motor 52.

The gear box 100 may transmit the driving force of the motor 52 to the inner pulsator 92 and the outer pulsator 94.

The gear box 100 rotates the inner pulsator 92 and the outer pulsator 94 in directions opposite to each other. The gear box 100 can rotate the inner pulsator 92 and the outer pulsator 94 at different speeds.

Even when the speed of the motor 52 is constantly inputted to the gear box 100, the inner pulsator 92 and the outer pulsator 94 may be rotated at different speeds depending on the load of the laundry.

The gear box 100 includes a sun gear 110 connected to the drive shaft 54 of the motor 52 and a plurality of planetary gears 120 meshed with the sun gear 110, A ring gear 130 rotatably engaged with the planetary gear 120 and a carrier 140 connecting the planetary gears 120. The ring gear 130 is fixed and the sun gear 110, And a gear housing 150 in which the carrier 140 is disposed.

The sun gear 110, the planetary gear 120, the ring gear 130, and the carrier 140 are defined as planetary gear assemblies. Since the planetary gear assemblies are engaged or coupled to each other, they can be operated organically when the sun gear 110 rotates.

In this embodiment, the carrier 140 is operated in a carrier-free state in which it is not restrained.

The sun gear 110 is coupled to the drive shaft 54. The sun gear 110 is formed with gear teeth on its inner side and on its outer side.

The sun gear 110 is internally formed with a sun gear hollow 111 in a vertical direction. An inner tooth 112 is formed on an inner circumferential surface of the sun gear hollow 111. An external tooth 114 is formed on the outer circumferential surface of the sun gear 110.

The drive shaft (54) is inserted into the sun gear hollow (111). The drive shaft 54 is engaged with the internal teeth 112. The drive shaft 54 is formed in a serration shape.

A plurality of the planetary gears 120 are disposed around the sun gear 110.

The planetary gear 120 can be rotated by itself while revolving around the sun gear 110. In order to rotate, a planetary gear hollow 121 is formed in the planetary gear 120 in a vertical direction.

The planetary gear 120 may be rotated about the planetary gear hollow 121. The planetary gear 120 may revolve along the outer teeth 114 of the sun gear 110.

In this embodiment, six planetary gears 120 are disposed. The respective planetary gears 120 are engaged with the external teeth 114 of the sun gear 110. The sun gear 110 and the planetary gear 120 are arranged horizontally.

The ring gear 130 is connected to the inner pulsator 92. The ring gear 130 transmits rotational force to the inner pulsator 92. The ring gear 130 is disposed outside the planetary gears 120 and meshes with the planetary gears 120. The ring gear 130 is formed to surround the planetary gear 120.

In the present embodiment, the ring gear 130 is formed with its lower side opened.

The ring gear 130 covers the sun gear 110, the planetary gear 120, and the upper side of the carrier 140. The sun gear 110, the planetary gear 120, and the carrier 140 may be located inside the ring gear 130.

A ring gear space 131 in which the sun gear 110, the planetary gear 120, and the carrier 140 are accommodated is formed in the ring gear 130.

A ring gear tooth 135 is formed on the inner circumferential surface of the ring gear 130 to engage with the planetary gear 120.

The ring gear 130 includes a ring gear body 132 having a lower side and a ring gear space 131 formed therein and a ring gear body 132 formed on the inner peripheral surface of the ring gear body 132, And a ring gear shaft 160 protruded upward from the ring gear body 132 and engaged with the inner gear pulley 92. The ring gear gear 135 is engaged with the ring gear gear 135,

A ring gear shaft hole 161 is formed in the ring gear shaft 160 so as to extend vertically. The ring gear shaft hollow 161 and the ring gear space 131 can communicate with each other.

The ring gear 130 may be rotated in a direction opposite to the carrier 140.

The planetary gear 120 is disposed between the ring gear 130 and the sun gear 110 and meshed with the ring gear 130 and the sun gear 110 at the same time.

The carrier 140 connects the plurality of planetary gears 120. The plurality of planet gears 120 can be revolved at the same speed by the carrier 140.

The carrier (140) transmits rotational force to the outer pulsator (94). In this embodiment, the carrier 140 is coupled to the gear housing 150. Therefore, the rotational force of the carrier 140 is transmitted to the outer pulsator 94 through the gear housing 150.

The carrier 140 includes an upper carrier body 144 disposed on the upper side of the sun gear 110 and the planetary gears 120 and a sun gear 110 disposed on the lower side of the sun gear 110 and the planetary gears 120, A lower carrier body 142 for supporting the planetary gear 120 and the planetary gears 120 and at least one of the upper carrier body 144 and the lower carrier body 142, (Not shown).

The sun gear 110 and the planetary gear 120 are disposed between the upper carrier body 144 and the lower carrier body 142.

The lower carrier body 142 is positioned below the planetary gears 120.

The upper carrier body 144 is positioned above the planetary gears 120.

In this embodiment, a planetary gear shaft 141 is formed on the lower carrier body 142. The planetary gear shaft 141 is inserted into the planetary gear hollow 121. The planetary gear 120 is rotated about the planetary gear shaft 141.

A plurality of the planetary gear shafts 141 are formed and disposed in the circumferential direction on the lower carrier body 142. The planetary gear shafts 141 are equally spaced with respect to the circumferential direction.

The sun gear 110 is also located above the lower carrier body 142. The lower carrier body 142 supports the sun gear 110. The sun gear 110 is rotated on the lower carrier body 142.

The lower carrier body 142 is formed with a lower sun gear groove 146 into which the sun gear 110 is inserted. The drive shaft 54 is inserted through the lower sun gear groove 146. The drive shaft 54 is inserted through the lower sun gear groove 146 and is coupled to the sun gear 110.

The upper carrier body 144 is positioned above the lower carrier body 142. The upper carrier body 144 is engaged with the lower carrier body 142.

The upper carrier body 144 has a lower sun gear groove 147 in which a part of the sun gear 110 is inserted. A planetary gear shaft groove 148 into which the planetary gear shaft 141 is inserted is formed on a lower surface of the upper carrier body 144.

The upper carrier body 144 is assembled with the lower carrier body 142 and operates integrally.

In this embodiment, two carrier bodies are separately manufactured, but they may be formed of only one carrier body.

The gear housing 150 is engaged with the outer pulsator 94. The outer pulsator 94 is rotated by the rotation of the gear housing 150.

The gear housing 150 is formed with an open bottom side. The gear housing 150 has a housing space 156 formed therein. The ring gear 130 is inserted into the housing space 155.

A ring gear shaft hole 151 through which the ring gear shaft 160 passes is formed in the gear housing 150.

A housing locking protrusion 155 is formed in the upper housing 154 to transmit the rotational force of the gear housing 150 to the outer pulsator 94.

The outer pulsator 94 is coupled to the housing locking protrusion 155. The housing locking protrusions 155 may interfere with the outer pulsator 94 and transmit rotational force to the outer pulsator 94 by the mutual interference.

In the present embodiment, the housing locking protrusion 155 is formed so as to protrude in the vertical direction. The outer pulsator 94 is coupled with the housing locking projection 155 in the vertical direction to form mutual engagement in the horizontal direction.

The outer pulsator 94 and the housing locking protrusions 155 may be formed in various directions and shapes.

Also, the outer pulsator 94 and the gear housing 150 may be combined in various ways. For example, the outer pulsator 94 and the gear housing 150 may be hooked. The outer pulsator 94 and the gear housing 150 may be coupled to each other.

In this embodiment, the bearings are disposed for rotation of the sun gear 110, the planetary gear 120, the carrier 140, and the gear housing 150.

The first bearing 171 may be disposed between the sun gear 110 and the lower carrier body 142. The first bearing 171 may be disposed in the lower sun gear groove 146.

The second bearing 172 may be disposed between the sun gear 110 and the upper carrier body 144. The second bearing 172 may be disposed in the upper sun gear groove 147. The first bearing 171 and the second bearing 172 minimize friction so that the sun gear 110 can rotate smoothly.

The third bearing 173 may be disposed between the lower carrier body 142 and the ring gear body 132. The third bearing 173 reduces friction when the ring gear 130 and the carrier 140 rotate.

The lower carrier body 142 is formed with a bearing groove 145 into which the third bearing 173 is inserted. The bearing groove 145 is formed in a ring shape.

A part of the lower end of the ring gear 130 is brought into contact with the third bearing 173. The third bearing 173 may be located in the ring gear space 131 of the ring gear 130. That is, the third bearing 173 supports the ring gear 130 outwardly from the ring gear space 131.

The fourth bearing 174 may be disposed between the ring gear 130 and the gear housing 150. The fourth bearing 174 may be disposed between the ring gear shaft 160 and the gear housing 150. The fourth bearing 174 is inserted into the gear housing 150. The gear housing 150 is formed with a bearing groove 153 into which the fourth bearing 174 is inserted. In this embodiment, the housing space 156, the bearing groove 153, and the ring gear shaft hole 151 are connected. The diameter of the bearing groove 153 is formed to be larger than that of the ring gear shaft hole 151.

The fourth bearing 174 minimizes friction so that the ring gear shaft 160 and the gear housing 150 can rotate smoothly.

In this embodiment, the first bearing 171 is supported on the carrier 140. The first bearing 171 is supported on the lower carrier body 142.

The second bearing 172 is installed to press the sun gear 110 downward.

The lower carrier body 142 and the upper carrier body 144 press the sun gear 110 through the first bearing 171 and the second bearing 172.

The sun gear 110 is installed between the lower carrier body 142 and the upper carrier body 144 and is rotated only in the horizontal direction.

The fourth bearing 174 is installed between the ring gear shaft 160 and the gear housing 150.

Hereinafter, the operation of the dual pulse generator according to the first embodiment of the present invention will be described in detail with reference to the drawings.

First, when the power is applied to the drive module 50 and the motor 52 is operated, the drive shaft 54 is rotated. When the driving shaft 54 is rotated, the sun gear 110 connected to the driving shaft 54 is rotated.

The drive shaft 54 can be rotated clockwise or counterclockwise by the operation of the motor 52.

For convenience of explanation, the direction in which the drive shaft 54 is rotated is defined as a forward direction, and the direction in which the drive shaft 54 is rotated in a direction opposite to the forward direction is defined as a reverse direction.

The sun gear 110 directly connected to the drive shaft 54 is rotated in a forward direction.

The planetary gear 120 is rotated in the reverse direction to the sun gear 110 because the sun gear 110 is circumscribed and the planetary gear 120 is engaged. That is, the planetary gear 120 is rotated in the reverse direction.

Here, the carrier 140 connecting the planetary gears 120 is rotated in the positive direction opposite to the planetary gear 120. That is, the rotation direction of the sun gear 110 and the rotation direction of the carrier 140 are the same.

The planetary gear 120 rotates about the planetary gear shaft 141 and revolves about the sun gear 110. Since the planetary gear 120 is not fixed but is in a free state, it is provided with a reaction force when engaged with the ring gear 130.

Thus, the ring gear 130 is rotated in the reverse direction opposite to the carrier 140.

Thus, the carrier 140 and the ring gear 130 according to the present embodiment are rotated in opposite directions to each other.

The carrier 140 rotates the outer pulsator 94 through the gear housing 150 and the ring gear 130 rotates the inner pulsator 92 through the ring gear shaft 160 .

Therefore, when the sun gear 110 rotates, the inner pulsator 92 and the outer pulsator 94 may be rotated in opposite directions.

In this embodiment, the carrier 140 is in a free state without restraint. Since the carrier 140 is in a free state, the speed may vary depending on the load applied to the inner pulsator 92 or the outer pulsator 94.

In this embodiment, the rotational force is input only to the sun gear 110, and both the planetary gear 120, the carrier 140, and the ring gear 130 are in a free state.

The rotational speed of the inner pulsator 92 or the rotational speed of the outer pulsator 94 may vary depending on the load applied to the inner pulsator 92 or the outer pulsator 94.

For example, when the laundry is loaded on the inner pulsator 92 or when the laundry is loaded on the outer pulsator 94, the speed is different. In addition, when the laundry is laid on the inner pulsator 92 and the outer pulsator 94, the speed can be varied according to the load.

As described above, if the speed of the inner pulsator 92 or the outer pulsator 94 is varied in opposite directions, the washing effect can be maximized. For example, twisting, rubbing, or weaving operations on laundry may be implemented. In particular, since the speed varies depending on the load of the laundry, damage to the laundry can be reduced.

As in the prior art, even if the load is high, if the pulsator is operated at a high speed, the frictional force becomes large and the laundry is damaged. In the washing machine according to the present embodiment, when the load is high, the inner pulsator 92 or the outer pulsator 94 rotates at a low speed, and when the load is low, the washing machine can rotate more quickly.

The rotational speeds of the inner pulsator 92 and the outer pulsator 94 are illustrated by the graph of Fig.

The outer pulsator rotation speed (Wouter pulsator) is calculated by the following equation.

Ws: sun gear speed

Wm: Motor rotation speed (Wm = Ws)

Wr: Ring gear rotation speed

Winner pulsator: Inner pulsator rotation speed (Winner pulsator = Wr)

Zs: number of sun gear teeth

Zr: Number of teeth of ring gear

In this embodiment, since the sun gear 110 and the drive shaft 54 are directly connected, the motor rotation speed and the sun gear rotation speed are the same.

The ring gear rotational speed and the rotational speed of the outer pulsator 94 are the same because the gear housing 150 and the oval pulser 94 to which the ring gear 130 is fixed in this embodiment are directly connected.

In this embodiment, the number of teeth of the sun gear 110 is 110, the number of teeth of the planetary gear 120 is 20, and the number of teeth of the ring gear 130 is 80.

When the graph according to the above formula is analyzed,

The inner pulsator rotation speed (Winner pulsator) = 0 to 1/2 Wm (motor rotation speed),

Wouter pulsator of outer pulsator = 0 ~ 1 / 3Wm (motor rotation speed)

.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and range of the claims and the equivalents thereof are included in the scope of the present invention Should be interpreted.

50: drive module 52: motor
54: drive shaft 90: dual pulsator
92: Inner Pulsator 94: Outer Pulsator
95: rotation space 96: pulsator base
97: mounting groove 100: gear box
110: Sunguer 111: Sungear hollow
112: internal teeth 114: external teeth
120: Planetary gear 121: Planetary gear hollow
130: ring gear 140: carrier
141: planetary gear shaft 142: lower carrier body
144: upper carrier body 146: lower sun gear groove
147: Upper sun gear groove 148: Planetary gear shaft
150: gear housing 151: ring gear shaft hole
153: Bearing groove 155: Housing locking projection
160: Ring gear shaft 161: Ring gear shaft hollow
171: first bearing 172: second bearing
173: third bearing 174: fourth bearing

Claims (19)

A drum loaded with the laundry laid up and down;
A drive module for rotating the drum through a drive shaft;
An inner pulsator disposed on the drum, positioned on the driving shaft and rotated by receiving a rotational force from the driving module;
An outer pulser which is disposed on the drum, rotates on an outer side of the inner pulsator, and receives rotation force from the driving module and rotates in an opposite direction to the inner pulsator;
And a gear box disposed between the driving module and the drum and connected to the driving shaft to receive rotational force and rotate the inner pulsator and the outer pulsizer in opposite directions,
The gear box includes:
A sun gear connected to the drive shaft and rotated;
A plurality of planetary gears meshing with the sun gear and revolving along an outer circumferential surface of the sun gear while being rotated;
A ring gear rotatably engaged with the planetary gears;
A ring gear shaft formed on the ring gear and coupled to the inner pulsator;
A carrier that provides an axis of rotation of the planet gears, connects the planet gears, and rotates together when the planet gears are idle; And
And a gear housing to which the carrier is fixed,
The inner pearl cleat is connected to the ring gear shaft and is rotated, and the outer pearl cleat is connected to the gear housing and rotated,
The planetary gear, the carrier and the ring gear, except for the sun gear, are arranged in a free state,
Wherein the drive shaft is selectively connected to the drum. The method according to claim 1,
Wherein the outer pear setter is formed with a rotating space inside and the inner pear setter is positioned and rotated in the rotating space. The method of claim 2,
And a pulsator base for covering a lower side of the rotating space. The method according to claim 1,
The drum includes a drum body formed in a cylindrical shape, and a drum base coupled to a lower side of the drum body,
A hub is disposed in the drum base,
Wherein the drive shaft is selectively connected to a hub of the drum. The method according to claim 1,
Wherein the sun gear is formed with a sun gear hollow therein, and the drive shaft is inserted and coupled to the sun gear hollow. The method according to claim 1,
Wherein the carrier supports the sun gear. The method of claim 6,
And a bearing disposed between the carrier and the sun gear. The method according to claim 1,
The gear housing includes:
A housing body coupled to the carrier and coupled to the outer pulsator;
A housing space formed in the housing body and into which the ring gear is inserted;
And a ring gear shaft hole formed in the housing body and through which the ring gear shaft is passed. The method according to claim 1,
The carrier
An upper carrier body disposed above the sun gear and the planetary gears;
A lower carrier body disposed below the sun gear and the planetary gears and supporting the sun gear and the planetary gears;
And a planetary gear shaft formed on at least one of the upper carrier body and the lower carrier body and providing a rotation axis of the planetary gear. The method of claim 9,
Wherein at least one of the upper carrier body and the lower carrier body is formed with a sun gear groove into which the sun gear is inserted, and a bearing is disposed in the sun gear groove. The method of claim 9,
The upper carrier body is formed with an upper sun gear groove into which an upper part of the sun gear is inserted, a lower sun gear groove into which a lower part of the sun gear is inserted is formed in the lower carrier body,
And a bearing for reducing friction of the sun gear is disposed in the upper sun gear groove and the lower sun gear groove, respectively. The method of claim 9,
The gear housing includes:
A housing body coupled to the outer pulsator and coupled to the lower carrier body;
A housing space formed in the housing body and into which the ring gear is inserted;
And a ring gear shaft hole formed in the housing body and through which the ring gear shaft is passed. The method of claim 12,
The housing space and the ring gear shaft hole are formed to communicate with each other,
Wherein the ring gear is inserted into the housing space, and the ring gear shaft is coupled to the inner pulsator through the ring gear shaft hole. The method of claim 12,
Wherein a housing locking protrusion is formed on an outer side of the housing body, and the housing locking protrusion is engaged with the outer pulsator. The method according to claim 1,
Wherein the ring gear is disposed between the gear housing and the carrier and is rotated in a direction opposite to the carrier. The method according to claim 1,
The ring gear
A ring gear body having a ring gear space formed therein;
And a ring gear tooth formed on an inner peripheral surface of the ring gear body and engaged with the planetary gears,
And the ring gear shaft is protruded upward from the ring gear body. 18. The method of claim 16,
And a bearing is disposed between the ring gear shaft and the gear housing. 18. The method of claim 16,
Wherein a bearing is disposed between the ring gear body and the carrier. A drum loaded with the laundry laid up and down; A drive module for selectively rotating the drum through a drive shaft; An inner pulsator disposed on the drum, positioned on the driving shaft and rotated by receiving a rotational force from the driving module; An outer pulser which is disposed on the drum, rotates on an outer side of the inner pulsator, and receives rotation force from the driving module and rotates in an opposite direction to the inner pulsator; And a gear box disposed between the driving module and the drum and connected to the driving shaft to receive rotational force and rotate the inner pulsator and the outer pulsizer in opposite directions,
The gear box includes:
A sun gear connected to the drive shaft and rotated; A plurality of planetary gears meshing with the sun gear and revolving along an outer circumferential surface of the sun gear while being rotated; A ring gear coupled to the planetary gears and rotated to transmit rotational force to the inner pulsator; A carrier formed on the ring gear, providing a rotation axis of the planetary gears, connecting the planetary gears, rotating together when the planetary gears are idle, and transmitting torque to the outer pulsator; And a gear housing to which the carrier is fixed,
The ring gear
A ring gear body having a ring gear space formed therein; A ring gear tooth formed on an inner circumferential surface of the ring gear body and meshing with the planetary gears; And a ring gear shaft protruding from the ring gear body and coupled to the inner pulsator,
The gear housing includes:
A housing body coupled to the carrier and coupled to the outer pulsator; And a ring gear shaft hole formed in the housing body and through which the ring gear shaft passes,
The carrier
An upper carrier body disposed below the ring gear and disposed above the sun gear and the planetary gears; A lower carrier body disposed below the sun gear and the planetary gears and supporting the sun gear and the planet gears and coupled to the gear housing; And a planetary gear shaft formed on the lower carrier body and providing a rotation axis of the planetary gear,
Wherein the planetary gear, the carrier and the ring gear except the sun gear are arranged in a free state.

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