KR20150075833A - Apparatus for power transmission and power control of washing machine - Google Patents

Abstract

A power transmission device and a power control device of a washing machine are disclosed. According to an embodiment of the present invention, provided can be a power transmission device of a washing machine comprising: a driving unit capable of rotating bidirectionally; a gear mechanism including an input axis connected to the driving unit to receive power, a deceleration assembly gearing with the input axis to reduce a rotating speed using a predetermined gear ratio, a washing axis connected to the deceleration assembly to rotate in the gear ratio, and a dewatering assembly selectively connected to the driving unit when in a dewatering mode and rotating independently from the washing axis; a coupling unit for selectively transmitting the power of the driving unit to the dewatering assembly when in the dewatering mode; and a brake unit capable of selectively and forcibly stopping the dewatering assembly in the dewatering mode.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a power transmission apparatus and a power control apparatus for a washing machine,

The present invention relates to a power transmission device and a power control device of a washing machine.

Generally, a washing machine removes contaminants from clothes, bedding, etc. (hereinafter referred to as "laundry") by using friction and impact of water caused by the rotation of a washing blade (pulsator) while using water and a detergent As a device, a washing method is automatically set by detecting the amount and type of the laundry by a normal sensor, and water is supplied at an appropriate level according to the amount and type of the laundry to perform washing through the control of the microcomputer.

A water reservoir for storing water may be installed inside the cabinet forming the outer shape of the washing machine. A washing tub for washing and dewatering may be installed inside the water storage tank.

In addition, the dewatering shaft rotated in the dehydrating mode is connected to the washing tub, and the laundry can be dewatered while rotating the washing tub at a high speed in one direction. The pulsator for generating a water flow in the washing mode may be rotatably installed in the washing tub in both directions.

The washing machine may include a driving motor as a power source, and a power transmitting device for selectively transmitting the power of the driving motor to the washing shaft or the dewatering shaft.

In the conventional washing machine as described above, when the washing machine is in the dehydrating mode, the washing machine is dehydrated while rotating at a high speed in one direction. At this time, since the user may be injured by the washing machine and laundry which rotate at high speed when the user opens the door of the washing machine, the opening of the washing machine door is restricted so that the user can not open the washing machine door during dehydration Door safety devices may be installed in the washing machine.

The door safety device includes a magnet installed in the washing machine door, a sensor unit installed in the washing machine body to detect whether the door is opened through the sensing of the magnet, a controller for transmitting a control signal according to an electrical signal of the sensor unit, And door locking means for limiting the opening of the washing machine door in accordance with a control signal of the control portion.

As described above, in the conventional washing machine, since a large number of parts as described above are used in order to prevent the door of the washing machine from being opened arbitrarily during dehydration, the manufacturing cost of the washing machine is increased and the locking structure of the washing machine door is complicated There are disadvantages.

Further, since the conventional washing machine has a structure in which the washing machine door is not opened unconditionally during dehydration, even if the user desires to open the washing machine door, the user can not open the door. In order to open the door, There is an inconvenience that the door is opened after releasing the dehydration mode of the washing machine and the laundry and waiting for the laundry to stop.

Korean Patent Publication No. 10-1995-14460

The embodiment of the present invention provides a power transmission device and a power control device of a washing machine which can reduce the manufacturing cost of the washing machine and simplify the structure of the washing machine while opening the washing machine door easily and conveniently without a safety accident in the dehydration mode I want to.

According to an aspect of the present invention, there is provided a driving unit comprising: a driving unit rotatable in both directions; A deceleration assembly that is connected to the drive unit and receives power, a deceleration assembly that is gear-engaged with the input shaft to reduce a rotation speed at a predetermined gear ratio, a washing shaft connected to the deceleration assembly and rotated at the gear ratio, A gear mechanism including a dewatering assembly selectively connected to the driving unit and rotated independently of the washing shaft; A coupling unit for selectively transmitting power of the driving unit to the dewatering assembly in the dewatering mode; And a brake unit capable of selectively forcibly stopping the dewatering assembly in the dewatering mode.

The driving unit may be a direct drive motor that directly transmits power to the input shaft and is rotated in a forward or reverse direction by a control signal.

The driving unit may further include: a first rotor unit for transmitting power to the input shaft;

And a second rotor unit installed coaxially with the first rotor unit and transmitting power to the dehydration assembly.

The deceleration assembly may further include: a sun gear formed at an end of the input shaft; At least two planetary pinions installed to circumscribe the sun gear; And a ring gear that is gear-engaged in an inscribed shape with the planetary pinion and accommodates the sun gear and the planetary pinion.

One end of the washing shaft is connected to a carrier coupled to the planetary pinion to receive power, and the other end of the washing shaft can be connected to a pulsator for generating a water flow.

The dewatering assembly may further include: a dehydrating rotating body which is rotated by receiving power of the driving unit through the coupling unit; A dehydrating drum portion coupled to the dehydrating rotator and rotated at the same rotation center, and to which the deceleration assembly is coupled; And a dewatering shaft having one end coupled to the lower portion of the dewatering drum and rotated and the other end coupled to the washing tub to rotate the washing tub.

The dewatering rotating body may include a first gear portion formed on the upper portion and gear-coupled to the coupling unit; And a flange portion formed at a lower portion of the first gear portion and assembled with the dewatering drum portion.

The coupling unit may include a sliding coupler that is fitted to an outer circumferential surface of the dewatering rotating body and is selectively gear-coupled to the driving unit while being vertically moved in a gear-engaged state with the first gear unit. An elastic member for providing the sliding coupler with an elastic force in the direction of the driving unit so that the sliding coupler is gear-connected to the driving unit; And a push lever for providing an external force to the sliding coupler in a direction to overcome the elastic force of the elastic member to release the gear engagement with the drive unit.

The sliding coupler may further include: a first spline portion formed at an upper portion thereof to be coupled to a second rotor portion of the driving unit; And a second spline portion formed at a lower portion of the first spline portion and gear-coupled with the first gear portion of the dehydrator.

The coupling unit may further include stopper means for restricting rotation of the sliding coupler disengaged from the second rotor portion so that free rotation of the sliding coupler is restricted in the washing mode.

The gear mechanism may include a case that receives the dehydrating rotating body and the dehydrating drum, but is fixed without rotating.

The stopper means may include a first stopper formed at a lower end of the sliding coupler and having a plurality of protrusions spaced apart in the circumferential direction; And a second stopper formed on the stop flange coupled to the case, the stopper being fitted to the first stopper to restrict the rotation of the first stopper.

Further, the push lever may be installed in either the case or the stop flange.

According to another aspect of the present invention, there is also provided a driving unit including a first rotor portion rotatable in both directions and mounted on a rotation center axis, and a second rotor portion coaxially installed with the first rotor portion; A reduction gear assembly that is connected to the first rotor and receives power, a reduction assembly that is gear-engaged with the input shaft to reduce the rotation speed at a predetermined gear ratio, a washing shaft connected to the reduction assembly and rotated at the gear ratio, And a dewatering assembly selectively connected to the second rotor unit and rotated independently of the washing shaft; A coupling unit for selectively transmitting the power of the second rotor unit to the dewatering assembly in the dewatering mode;

A brake unit capable of selectively forcibly stopping the dewatering assembly in the dewatering mode; A door open sensing part for sensing opening of the door of the washing machine; And a control unit that determines the washing mode and the dehydration mode to interrupt the power connection between the coupling unit and the second rotor unit in the washing mode and connects the coupling unit and the second rotor unit in the dehydrating mode, And a control unit for controlling the brake unit in response to a signal from the door opening sensing unit when the door of the washing machine is opened to forcibly stop the dewatering assembly.

The deceleration assembly may further include: a sun gear formed at an end of the input shaft; At least two planetary pinions installed to circumscribe the sun gear; And a ring gear that is gear-engaged in an inscribed shape with the planetary pinion and accommodates the sun gear and the planetary pinion.

The dewatering assembly may further include: a dehydrating rotating body which is rotated by receiving power of the driving unit through the coupling unit; A dehydrating drum portion coupled to the dehydrating rotator and rotated at the same rotation center, and to which the deceleration assembly is coupled; And a dewatering shaft having one end coupled to the lower portion of the dewatering drum and rotated and the other end coupled to the washing tub to rotate the washing tub.

The dewatering rotating body may include a first gear portion formed on the upper portion and gear-coupled to the coupling unit; And a flange portion formed at a lower portion of the first gear portion and assembled with the dewatering drum portion.

The coupling unit may include a sliding coupler that is inserted into the outer peripheral surface of the dewatering rotating body and is selectively engaged with the second rotor portion while being moved in the vertical direction; An elastic member for providing the sliding coupler with an elastic force in the direction of the driving unit so that the sliding coupler is gear-engaged with the second motor unit; And a push lever for providing an external force to the sliding coupler in a direction to overcome the elastic force of the elastic member to release the gear engagement with the second rotor portion.

The sliding coupler may further include: a first spline portion formed at an upper portion thereof to be coupled to a second rotor portion of the driving unit; And a second spline portion formed at a lower portion of the first spline portion and gear-coupled with the first gear portion of the dehydrator.

The coupling unit may further include stopper means for restricting rotation of the sliding coupler disengaged from the second rotor portion so that free rotation of the sliding coupler is restricted in the washing mode.

According to the embodiments of the present invention, the manufacturing cost can be reduced by reducing the number of components of the washing machine, the structure of the washing machine can be simplified, and in particular, the dehydration assembly can be stopped through the brake unit even in the dehydration mode, It is possible to open the washing machine door during dehydration without danger of the washing machine.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a washing machine equipped with a power transmission device of a washing machine according to an embodiment of the present invention;
FIG. 2 is a perspective view illustrating a power transmission apparatus of a washing machine according to an embodiment of the present invention. FIG.
Fig. 3 is an exploded perspective view of the power transmission device of Fig. 2,
Fig. 4 is an exploded perspective view showing the driving unit separated from Fig. 2,
5 is a perspective view of a drive unit showing a first rotor portion and a second rotor portion of a drive unit according to an embodiment of the present invention,
6 is an exploded perspective view showing a gear mechanism, a coupling unit, and a brake unit according to an embodiment of the present invention;
7 is an exploded perspective view showing a structure of a gear mechanism according to an embodiment of the present invention,
FIG. 8 is a sectional view of a washing machine power transmission apparatus according to an embodiment of the present invention,
9 is a sectional view of the power transmission device of the washing machine according to the embodiment of the present invention in the dehydration mode,
10 is a block diagram showing control logic of a washing machine power control apparatus according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, configurations and operations according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE INVENTION The following description is one of many aspects of the claimed invention and the following description may form part of the detailed description of the invention.

However, the detailed description of known configurations or functions in describing the present invention may be omitted for clarity.

While the invention is susceptible to various modifications and its various embodiments, it is intended to illustrate the specific embodiments and the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Terms including ordinals such as first, second, etc. may be used to describe various elements, but the elements are not limited by such terms. These terms are used only to distinguish one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that no other element exists in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

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

2 is a perspective view of a power transmitting apparatus of a washing machine according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of the power transmitting apparatus of the washing machine according to the present invention. Fig. 3 is an exploded perspective view of the power transmission device of Fig.

1 to 3, a power transmitting apparatus 10 of a washing machine 1 according to an embodiment of the present invention includes a driving unit 100, a gear mechanism 2000, a coupling unit 300 And a brake unit 400, as shown in FIG.

The meaning that the present embodiment includes the configurations listed above does not mean that these configurations are merely constituted by these configurations but means that they basically include these configurations and may also include other configurations (for example, well-known technology widely known in the washing machine) , And the known technology may obscure the gist of the present invention, and a detailed description thereof will be omitted.

When the power transmitting apparatus 10 of this embodiment shown in Fig. 2 is actually installed in the washing machine 1, the driving unit 100 is installed at the lowermost position as shown in Fig.

However, for the sake of convenience, the following description and the drawings shown in Fig. 2 and later will be described with reference to the direction shown in Fig. 2, not the actual installation direction of the power transmission apparatus 10 as shown in Fig.

The driving unit 100 may be rotated in both directions. The direction may be controlled in a forward or reverse direction according to a control signal provided from the outside, and the rotational speed may be controlled according to the control signal.

3, the driving unit 100 includes a housing 101 which forms an outer appearance, a stator (not shown) installed inside the housing 101 and capable of converting kinetic energy from electric energy supplied from the outside 102) may be included. The housing 101 can be rotated by the stator 102.

3 and 5, the driving unit 100 may include a first rotor unit 110 and a second rotor unit 120, and the first rotor unit 110 may include the first rotor unit 110 and the second rotor unit 120, And may be detachably installed on the rotation center axis of the housing 101. [ A first rotor gear 111 may be formed on an inner circumferential surface of the first rotor portion 110.

The second rotor unit 120 may be installed on the housing 101 and coaxially with the first rotor unit 110. Accordingly, the rotational center of the housing 101, the first rotor portion 110, and the second rotor portion 120 may be the same. The second rotor unit 120 may be coupled to an outer circumferential surface of the first rotor unit 110 and rotated integrally with the first rotor unit 110.

The first rotor unit 110 is coupled to the input shaft 2100 of the gear mechanism 2000 when the first rotor unit 110 and the second rotor unit 120 are coupled to the housing 101, And the second rotor portion 120 may selectively transmit power to the dewatering assembly 2400 of the gear mechanism 2000. [ As shown in FIG. 5, the second rotor unit 120 includes a second rotor gear 121 protruding downward so that the second rotor unit 120 can selectively transmit power to the dehydration assembly 2400. May be spaced apart from each other by a predetermined distance in the circumferential direction. The second rotor gear 121 may have a structure in which protrusions and grooves are alternately repeatedly formed.

The structure and structure of the gear mechanism 2000 including the input shaft 2100 and the dewatering assembly 2400 will be described in detail below.

3 and 4, the gear mechanism 2000 may include an input shaft 2100, a reduction assembly 2200, a washing shaft 2300, and a dewatering assembly 2400.

The input shaft 2100 may be connected to the first rotor unit 110 of the drive unit 100 to receive power and the power of the drive unit 100 may be transmitted to the reduction assembly 2200 As shown in Fig.

An input gear 2110 may be formed at one end of the input shaft 2100 to be engaged with the first rotor gear 111 of the first rotor unit 110. The input gear 2110 may be connected to the first rotor gear 111 to receive power from the first rotor unit 110.

A sun gear 2210 for transmitting power to the reduction assembly 2200 may be formed at the other end of the input shaft 2100.

3 and 7, the reduction assembly 2200 is configured to be engaged with the input shaft 2100 to reduce the rotation speed at a predetermined gear ratio. The deceleration assembly 2200 receives the power from the input shaft 2100 to reduce the rotational speed and increase the rotational force, thereby performing the washing and dehydrating operation requiring a large force by the low-capacity driving unit 100 .

Here, the reduction assembly 2200 may include a sun gear 2210 and a planetary pinion 2220 and a ring gear 2230, to which a carrier (Figs. 8 and 2240) may be added.

The sun gear 2210 is formed at the other end of the input shaft 2100 to transmit the power of the input shaft 2100 to the reduction assembly 2200.

At least two or more planetary pinions 2220 may be installed to contact the outer circumferential surface of the sun gear 2210. The planetary pinion 2220 may be disposed at a predetermined distance from the other planetary pinions 2220 so as not to directly contact the other planetary pinions 2220.

The inner circumferential surface of the ring gear 2230 is engaged with the outer circumferential surface of the planetary pinion 2220 so that the sun gear 2210 and the planetary pinion 2220 are accommodated in the ring gear 2230 .

8 and 9, the rotation shaft 2221 of the plurality of planetary pinions 2220 may be coupled to the carrier 2240.

The speed reduction assembly 2200 can appropriately adjust the sun gear 2210, the planetary pinion 2220, and the ring gear 2230 to set a gear ratio desired by the user, and the gear ratio can be transmitted from the drive unit 100 The received power can be decelerated.

Further, the washing shaft 2300 may be connected to the reduction assembly 2200 and rotated at the gear ratio. One end of the washing shaft 2300 may be connected to the carrier 2240 and rotated at the same rotational speed as that of the carrier 2240. The other end of the washing shaft 2300 may be a water flow The pulsator 2 can be rotated to rotate the pulsator 2. As a result, the pulsator 2 can be rotated at a predetermined gear ratio and rotated forward or backward in accordance with the rotation direction of the drive unit 100.

In addition, the dehydration assembly 2400 is operated only in the dehydration mode, and is selectively connected to the driving unit 100 to receive power and rotate independently of the washing shaft 2300. The dewatering assembly 2400 receives power from the second rotor unit 120 and is rotated regardless of the rotation of the washing shaft 2300.

3 and 7, the dewatering assembly 2400 may include a dewatering rotating body 2410, a dewatering drum 2420, and a dewaxing shaft 2430.

The dehydrating rotating body 2410 may be rotated by selectively receiving the power of the driving unit 100 through the coupling unit 300. The dewatering rotary body 2410 may include a first gear portion 2411 and a flange portion 2412.

The first gear portion 2411 is formed on the dehydrating rotating body 2410 and can receive the power of the driving unit 100 through the coupling unit 300. The first gear portion 2411 may be formed in a cylindrical shape.

The flange portion 2412 is formed at the lower portion of the first gear portion 2411 in the dewatering rotating body 2410 and connected to the dewatering drum portion 2420 so as to be assembled with the dewatering drum portion 2420 May be formed in corresponding sizes.

The dewatering drum unit 2420 is disposed below the dewatering rotating body 2410 and is coupled to the dewatering rotating body 2410 and rotated at the same rotation center as the dewatering rotating body 2410. A predetermined accommodation space may be formed in the dewatering drum portion 2420 to allow the deceleration assembly 2200 to be coupled thereto.

At this time, the inner side of the dewatering drum 2420 can be directly coupled with the outer side of the ring gear 2230. Therefore, when the dewatering drum portion 2420 rotates, the ring gear 2230 rotates together. When the dewatering drum portion 2420 stops, the ring gear 2230 also stops.

The dewatering shaft 2430 may be disposed on the outer circumferential surface of the washing shaft 2300 while being positioned below the dewatering drum 2420. Specifically, the washing shaft 2300 is provided between the washing shaft 2300 and the dehydrating shaft 2430 so as to rotate independently of the dehydrating shaft 2430 while the washing shaft 2300 is partially accommodated in the dehydrating shaft 2430 Conventional bearings can be installed.

One end 2310 of the washing shaft 2300 may be connected to the carrier 2240 of the reduction assembly 2200 accommodated in the drying drum 2300 and the other end 2320 of the washing shaft 2300 may be connected to the carrier 2240 of the reducing assembly 2200, May be coupled to the pulsator (2) to rotate the pulsator (2) in the washing mode. One end 2431 of the dewatering shaft 2430 is coupled to a lower portion of the dewatering drum portion 2420 and is integrally rotated with the dewatering drum portion 2420. The other end 2432 of the dewatering shaft 2430 is rotated 1 to the washing tub 3 to rotate the washing tub 3 in the dehydrating mode. In the dehydrating mode, the driving unit 100 is controlled to rotate in only one direction, and thus the washing tub 3 can be rotated in only one direction.

The coupling unit 300 selectively transmits the power of the driving unit 100 to the dewatering assembly 2400 in the dewatering mode to rotate the washing tub 3 through the dew condensation shaft 2430 have.

When the power of the driving unit 100 is transmitted to the dewatering assembly 2400 through the coupling unit 300, the washing tub 3 is rotated and water contained in the laundry in the washing tub 3 The dehydrated water is discharged by the centrifugal force. At this time, when the washing tub 3 is rotated at a high speed in one direction, the dehydrating effect can be enhanced.

In addition, in the washing mode, the coupling unit 300 does not transmit the power of the driving unit 100 to the dewatering assembly 2400 but blocks the washing unit 3 from rotating.

6 to 9, the coupling unit 300 may include a sliding coupler 310, an elastic member 320, and a push lever 330.

The sliding coupler 310 is fitted to the outer peripheral surface of the dehydrating rotating body 2410, specifically, the first gear portion 2411, and moves along the vertical direction while maintaining a state of gear engagement with the first gear portion 2411. [ And selectively gear-coupled to the drive unit 100.

The sliding coupler 310 may include a first spline 311 and a second spline 312. The first spline unit 311 may be formed on the upper inner circumferential surface of the sliding coupler 310 so as to be coupled to the second rotor unit 120 of the driving unit 100.

The first spline portion 311 is formed in a shape corresponding to the second rotor gear 121 of the second rotor portion 120, and the grooves and the protrusions are alternately and repeatedly formed. Therefore, when the sliding coupler 310 is moved toward the second rotor portion 120, the protrusion of the first spline portion 311 is inserted into the groove of the second rotor gear 121, (120). ≪ / RTI >

The second spline portion 312 is formed at the lower portion of the first spline portion 311 on the inner circumferential surface of the sliding coupler 310 and is connected to the first gear portion 2411 of the dehydrating rotating body 2410 And the power received from the second rotor unit 120 is transmitted to the dehydrating revolving body 2410 again.

9, even if the sliding coupler 310 moves toward the second rotor portion 120, the second spline portion 312 is always engaged with the first gear portion 2411 in a gear engagement relationship So that the power of the second rotor unit 120 can be transmitted to the dehydrating revolving body 2410.

8, the coupling unit 300 includes a stopper unit 340 for preventing the sliding coupler 310 from rotating freely while the coupling unit 300 is disengaged from the second rotor unit 120 .

The stopper means 340 may restrict free rotation of the sliding coupler 310 in the washing mode. Therefore, the sliding coupler 310 can be fixed without being rotated freely when the power is not transmitted from the second rotor unit 120 by the stopper means 340. As a result, When the water is generated in the washing tub 3 while the water 2 is rotated, the washing tub 3 can be fixed without being idle by the water flow.

Here, the gear mechanism 2000 may further include a case 2500 as shown in FIGS. The case 2500 receives the dehydrating rotating body 2410 and the dehydrating drum 2420 and is fixed without rotating together with the dehydrating rotating body 2410 and the dehydrating drum 2420. The case 2500 can cover and protect the dewatering rotating body 2410 and the dewatering drum 2420 from being seen from the outside.

The stopper means 340 may include a first stopper 341 and a second stopper 342 as shown in FIGS.

The first stopper 341 may be formed at the lower end of the sliding coupler 310 and may have a plurality of protrusions spaced apart from each other along the circumferential direction of the sliding coupler 310.

The second stopper 342 may be formed in the case 2500 facing the first stopper 341. The rotation of the first stopper 341 is restricted when the first stopper 341 is fitted to the second stopper 342 because the case 2500 is fixed without moving.

The second stopper 342 has a structure corresponding to the first stopper 341 and may have a plurality of protrusions spaced apart from each other along the circumferential direction.

The second stopper 342 may be formed directly on the case 2500 or may be formed on a separate stop flange 2510 coupled to the case 2500.

In addition, the elastic member 320 may provide an elastic force so that the sliding coupler 310 is gear-engaged with the driving unit 100. Therefore, the sliding coupler 310 can be moved toward the drive unit 100 by the elastic force of the elastic member 320 and can be gear-connected to the second rotor unit 120. The elastic member 320 may be a coil spring.

The push lever 330 may provide an external force to the sliding coupler 310 in a direction to overcome the elastic force of the elastic member 320 so that the sliding coupler 310 may move So that the gear engagement can be released from the drive unit 100.

The push lever 330 may be pivotably installed on either the case 2500 or the stop flange 2510.

8, when the push lever 330 is pivoted, when the sliding coupler 310 is pushed, the sliding coupler 310 moves downward in the drawing while exerting the elastic force of the elastic member 320 The power transmission to the dewatering assembly 2400 is interrupted because the sliding coupler 310 is disengaged from the second rotor portion 120 and the sliding coupler 310 is stopped by the stopper means 340. [ 310 to prevent rotation of the dewatering assembly 2400 in the washing mode.

9, when the push lever 330 does not push the sliding coupler 310, the sliding coupler 310 is lifted by the elastic force of the elastic member 320 to move the second rotor part 120 So that power is transmitted to the dewatering assembly 2400 to perform dewatering.

At this time, the push lever 330 can be operated by an external control signal. At the end of the push lever 330, a coupling actuator 331 operated by a control signal may be installed. The coupling actuator 331 may pull the end of the push lever 330 so that the push lever 330 pushes the sliding coupler 310.

The brake unit 400 can selectively stop the dehydration assembly 2400 when necessary in the dehydration mode. For example, when the user suddenly opens the door 4 of the washing machine during dehydration, the user may be injured by the washing tub 3 and laundry which rotate at a high speed. Therefore, when the door 4 is opened, the brake unit 400 can forcibly stop the dewatering assembly 2400 by an external control signal to quickly stop the washing tub 3.

The brake unit 400 may include a brake band unit 410 and a brake rod unit 420 as shown in FIGS.

The brake band portion 410 is disposed along the outer circumferential surface of the dewatering drum portion 2420 and is loosely loosened when the dewatering drum portion 2420 is rotated in the dewatering mode to prevent the rotation of the dewatering drum portion 2420 And when the dewatering drum portion 2420 is to be stopped as in the case where the door 4 of the washing machine is opened, the dewatering drum portion 2420 can be tightly wrapped by the external force.

The brake rod part 420 is connected to the brake band part 410 and provides an external force to the brake band part 410 so that the brake band part 410 tightly surrounds the dewatering drum part 2420, The dewatering drum portion 2420 is stopped.

At this time, the brake rod unit 420 can be operated by a brake actuator operated by an external control signal, but the illustration of the brake actuator is omitted.

Hereinafter, a power control apparatus for a washing machine according to another embodiment of the present invention will be described with reference to FIG.

Since the power control apparatus of the washing machine according to the present embodiment differs from the power transmission apparatus 10 of the washing machine described above in that the door opening sensing unit 500 and the control unit 600 are further provided, And the description of the power transmission device of the washing machine according to the embodiment of the present invention and the drawings are referred to for the same part.

The power control device of the washing machine according to the present embodiment includes a door open sensing part 500 and a control part 600 in addition to the drive unit 100, the gear mechanism 2000, the coupling unit 300 and the brake unit 400 described above .

The door opening sensing part 500 senses the opening of the door 4 of the washing machine and may be installed near the door 4 to detect the opening of the door 4. [ The door open sensing part 500 has various types and generally belongs to a well-known known technology, and thus a detailed description thereof will be omitted.

The controller 600 receives the wash signal 20 and the dehydration signal 30 from the washing machine 1 to determine the washing mode and the dehydration mode. The wash signal 20 and the dehydration signal 30 can be input through a washing switch and a dehydration switch which are normally operated by a user but can be inputted through other means if necessary.

The controller 600 may cut off the power connection between the sliding coupler 310 and the second rotor unit 120 in the washing mode. The control unit 600 operates the coupling actuator 331 provided at the end of the push lever 330 to block power coupling between the sliding coupler 310 and the second rotor unit 120 .

When the push lever 330 pushes the sliding coupler 310 by the coupling actuator 331, the sliding coupler 310 overcomes the elastic force of the elastic member 320, So that the sliding coupler 310 is disengaged from the second rotor part 120 and the power is shut off.

Also, the controller 600 may connect the coupling unit 300 with the second rotor unit 120 in the dehydrating mode. The controller 600 operates the coupling actuator 331 to move the push lever 330 away from the sliding coupler 310 as shown in FIG.

The sliding coupler 310 moves toward the second rotor unit 120 by the elastic force of the elastic member 320 if the external force of the push lever 330 is not applied to the sliding coupler 310. As a result, the sliding coupler 310 is gear-coupled to the second rotor part 120 and receives power from the second rotor part 120 to rotate the dehydrating assembly 2400.

When the door 4 of the washing machine is opened in the state where dehydration is performed as described above, the controller 600 senses the opening state of the washing machine door 4 by the signal of the door opening sensing part 500, (Not shown) to control the brake unit 400 to forcibly stop the dewatering assembly 2400. Therefore, even if the user opens the door 4 of the washing machine, the dewatering assembly 2400 stops quickly and the washing tub 3 stops simultaneously, thereby preventing a safety accident from occurring.

While the present invention has been described in connection with what is presently considered to be preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is to be understood that the invention is not limited thereto.

1: Washing machine 2: Pulsater
3: Washing machine 4: Washing machine door
100: drive unit 101: housing
110: first rotor section 111: first rotor gear
120: second rotor section 121: second rotor gear
2000: gear mechanism 2100: input shaft
2200: Deceleration assembly 2210:
2220: planetary pinion 2230: ring gear
2240: Carrier 2300: Washing shaft
2400: Dewatering assembly 2410: Dewatering rotating body
2411: first gear portion 2412: flange portion
2420: Dewatering drum part 2430: Dehydrating shrinkage
2500: Case 2510: Stop flange
300: coupling unit 310: sliding coupler
311: first spline portion 312: second spline portion
320: elastic member 330: push lever
331: Coupling actuator 340: Stopper means
341: first stopper 342: second stopper
400: Brake unit 410: Brake band
420: brake load section 500: door open sensing section
600:

Claims (20)

A drive unit rotatable in both directions;
A deceleration assembly that is connected to the drive unit and receives power, a deceleration assembly that is gear-engaged with the input shaft to reduce a rotation speed at a predetermined gear ratio, a washing shaft connected to the deceleration assembly and rotated at the gear ratio, A gear mechanism including a dewatering assembly selectively connected to the driving unit and rotated independently of the washing shaft;
A coupling unit for selectively transmitting power of the driving unit to the dewatering assembly in the dewatering mode; And
A brake unit capable of selectively forcibly stopping the dewatering assembly in the dewatering mode;
And the power transmission device of the washing machine. The method according to claim 1,
Wherein the driving unit is a direct drive motor that directly transmits power to the input shaft and is rotated in a forward direction or a reverse direction by a control signal. 3. The method of claim 2,
The driving unit includes:
A first rotor unit for transmitting power to the input shaft;
A second rotor unit installed coaxially with the first rotor unit and transmitting power to the dehydration assembly;
And the power transmission device of the washing machine. The method according to claim 1,
The deceleration assembly includes:
A sun gear formed at an end of the input shaft;
At least two planetary pinions installed to circumscribe the sun gear;
A ring gear which is gear-engaged with the planetary pinion in an inscribed shape and accommodates the sun gear and the planetary pinion;
And the power transmission device of the washing machine. 5. The method of claim 4,
Wherein one end of the washing shaft is connected to a carrier coupled to the planetary pinion to receive power, and the other end of the washing shaft is connected to a pulsator for generating a water flow. 5. The method of claim 4,
The dehydration assembly comprises:
A dewatering rotary body rotated by receiving power of the driving unit through the coupling unit;
A dehydrating drum portion coupled to the dehydrating rotator and rotated at the same rotation center, and to which the deceleration assembly is coupled;
And the other end is coupled to the washing tub to rotate the washing tub;
And the power transmission device of the washing machine. The method according to claim 6,
The dewatering rotating body may comprise:
A first gear portion formed on the upper portion and gear-coupled with the coupling unit;
A flange portion formed at a lower portion of the first gear portion and assembled with the dewatering drum portion;
And the power transmission device of the washing machine. 8. The method of claim 7,
The coupling unit includes:
A sliding coupler that is fitted to an outer circumferential surface of the dewatering rotating body and moves in a vertical direction in a gear-engaged state with the first gear portion, and is selectively gear-coupled to the drive unit;
An elastic member for providing the sliding coupler with an elastic force in the direction of the driving unit so that the sliding coupler is gear-connected to the driving unit;
A push lever for providing external force to the sliding coupler in a direction to overcome the elastic force of the elastic member to release the gear engagement with the drive unit;
And the power transmission device of the washing machine. 9. The method of claim 8,
The sliding coupler includes:
A first spline portion formed on an upper portion of the driving unit to be engaged with a second rotor portion;
A second spline portion formed at a lower portion of the first spline portion and gear-engaged with the first gear portion of the dewatering rotating body;
And the power transmission device of the washing machine. 10. The method of claim 9,
Wherein the coupling unit further includes stopper means for restraining rotation of the sliding coupler disengaged from the second rotor portion so that free rotation of the sliding coupler is restricted in the washing mode. 11. The method of claim 10,
Wherein the gear mechanism includes a case accommodating the dewatering rotary body and the dewatering drum portion but being fixed without rotation. 12. The method of claim 11,
Wherein the stopper means comprises:
A first stopper formed at a lower end of the sliding coupler and having a plurality of protrusions spaced apart in a circumferential direction;
A second stopper formed on a stop flange coupled to the case, the second stopper being fitted to the first stopper to restrict rotation of the first stopper;
And the power transmission device of the washing machine. 13. The method of claim 12,
Wherein the push lever is provided at any one of the case and the stop flange. A drive unit including a first rotor portion rotatable in both directions and installed on a rotation center axis, and a second rotor portion coaxially installed with the first rotor portion;
A reduction gear assembly that is connected to the first rotor and receives power, a reduction assembly that is gear-engaged with the input shaft to reduce the rotation speed at a predetermined gear ratio, a washing shaft connected to the reduction assembly and rotated at the gear ratio, And a dewatering assembly selectively connected to the second rotor unit and rotated independently of the washing shaft;
A coupling unit for selectively transmitting the power of the second rotor unit to the dewatering assembly in the dewatering mode;
A brake unit capable of selectively forcibly stopping the dewatering assembly in the dewatering mode;
A door open sensing part for sensing opening of the door of the washing machine; And
The control unit determines the washing mode and the dehydration mode to interrupt the power connection between the coupling unit and the second rotor unit in the washing mode and connects the coupling unit and the second rotor unit in the dehydrating mode, A control unit for controlling the brake unit in response to a signal from the door opening sensing unit when the door of the washing machine is opened to forcibly stop the dewatering assembly;
And a control unit for controlling the power of the washing machine. 15. The method of claim 14,
The deceleration assembly includes:
A sun gear formed at an end of the input shaft;
At least two planetary pinions installed to circumscribe the sun gear;
A ring gear which is gear-engaged with the planetary pinion in an inscribed shape and accommodates the sun gear and the planetary pinion;
And a control unit for controlling the power of the washing machine. 16. The method of claim 15,
The dehydration assembly comprises:
A dewatering rotary body rotated by receiving power of the driving unit through the coupling unit;
A dehydrating drum portion coupled to the dehydrating rotator and rotated at the same rotation center, and to which the deceleration assembly is coupled;
And the other end is coupled to the washing tub to rotate the washing tub;
And a control unit for controlling the power of the washing machine. 17. The method of claim 16,
The dewatering rotating body may comprise:
A first gear portion formed on the upper portion and gear-coupled with the coupling unit;
A flange portion formed at a lower portion of the first gear portion and assembled with the dewatering drum portion;
And a control unit for controlling the power of the washing machine. 18. The method of claim 17,
The coupling unit includes:
A sliding coupler which is fitted to an outer circumferential surface of the dewatering rotating body and moves in a vertical direction to be selectively gear-coupled to the second rotor portion;
An elastic member for providing the sliding coupler with an elastic force in the direction of the driving unit so that the sliding coupler is gear-engaged with the second motor unit;
A push lever for providing an external force to the sliding coupler in a direction to overcome the elastic force of the elastic member to release the gear engagement with the second rotor portion;
And a control unit for controlling the power of the washing machine. 19. The method of claim 18,
The sliding coupler includes:
A first spline portion formed on an upper portion of the driving unit to be engaged with a second rotor portion;
A second spline portion formed at a lower portion of the first spline portion and gear-engaged with the first gear portion of the dewatering rotating body;
And a control unit for controlling the power of the washing machine. 20. The method of claim 19,
The coupling unit further includes stopper means for restricting rotation of the sliding coupler disengaged from the second rotor portion so that the free rotation of the sliding coupler is restricted in the washing mode.

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