KR20170052724A

KR20170052724A - Driving device for washing machine, controlling method thereof and washing machine having the same

Info

Publication number: KR20170052724A
Application number: KR1020150153670A
Authority: KR
Inventors: 김병수; 고형환; 신종화; 이세기
Original assignee: 주식회사 아모텍
Priority date: 2015-11-03
Filing date: 2015-11-03
Publication date: 2017-05-15

Abstract

A washing machine driving apparatus according to the present invention includes a first washing shaft coupled to a rotor, a first washing / discharging shaft rotatably disposed on an outer circumference of the first washing shaft, a second washing shaft coupled to the pulsator, A first washing shafts and a second washing shafts which are rotatably arranged on the outer circumferential surface and to which a washing tub is connected, and a second washing shafts which are provided between the first washing shafts and the second washing shafts and between the first shrinking shrinkage and the second shrinking shrinkage, A first bearing for rotatably supporting the first dewatering shaft and a second bearing for rotatably supporting the second dewatering shaft, wherein the second bearing is arranged such that the pulsator is rotated in one direction Directional rotation so that the washing tub can be rotated in the opposite direction to the pulsator, so that the pulsator and the washing tub can be bi-directionally driven during the washing cycle.

Description

TECHNICAL FIELD [0001] The present invention relates to a driving apparatus for a washing machine, a control method therefor, and a washing machine having the same. BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving apparatus for a washing machine, a control method thereof, and a washing machine having the pulsator and the washing tub, which can drive the pulsator and the washing tub in the same direction and in mutually opposite directions.

Generally, a washing machine is an appliance product that removes contaminants such as clothes and bedding by using the friction and impact of a water stream due to the emulsification action of the detergent and the rotation of the laundry blades. The washing process of the washing machine is usually performed by washing / rinsing / / Drainage.

The washing machine can be classified into a pulsator washing machine and a drum washing machine according to the washing method. The pulsator washing machine has a separate inner tub and a pulsator installed under the washing tub. In the washing and rinsing operation, In the stopped state, only the pulsator rotates and causes the rotating water flow, and in the dehydration process, the pulsator and the washing tub rotate together.

A conventional washing machine driving apparatus is disclosed in Japanese Patent Application Laid-Open Publication No. 10-0910656 (Aug. 05, 2009), which comprises an outer tub provided in an outer case constituting an outer shape of a washing machine, a washing tub rotatably installed in the outer tub, The washing machine includes a washing blade rotatably installed on an inner bottom surface of a washing tub, a dewatering shaft for rotating the washing tub directly connected to the washing tub, a washing shaft connected to the washing blade for rotating the washing blade, A clutch assembly for controlling rotation of the washing shafts and the shaking shafts, a core having a pole surrounding the outer periphery thereof, and a coil wound around the pole, wherein the coil is mounted on one side of the clutch housing, A stator assembly for generating a rotating magnetic field by application of a magnetic field to the stator assembly; And a brake assembly for restricting the rotation of the drum. The rotor assembly includes a rotor assembly for holding the pole of the stator assembly while holding the stator assembly, inducing a current and generating rotational force, a planetary gear connected to the dehydrating shaft and the washing shaft to decelerate the rotational force,

In such a washing machine driving apparatus, when the rotor is rotated, the washing shaft is rotated and the washing blade connected to the washing shaft is rotated to perform a washing cycle. At this time, the dewatering shaft is fixed by the brake assembly and is not rotated. When the dehydrating shafts and the washing shafts are connected to each other during the rinsing and dewatering operations, the dehydrating shafts and the washing shafts are rotated at the same speed to perform rinsing and dewatering.

However, the washing machine driving apparatus described above has a complicated structure because a brake assembly for restricting the drum of the planetary gear is provided.

In the washing machine driving apparatus, the washing blade is rotated, the washing tub is stopped, or the washing blade and the washing tub are rotated in the same direction and at the same speed. However, the washing tub and the washing tub are bi- This is an impossible problem.

Patent Document 1: Registration Patent Publication No. 10-0910656 (Aug. 05, 2009)

It is an object of the present invention to provide a washing machine driving device capable of bi-directionally rotating a washing machine by using a bearing supporting a dewatering shaft connected between a washing tank and a ring gear of a planetary gear device, A control method thereof, and a washing machine having the same.

The washing machine driving apparatus according to the present invention comprises a first washing shaft connected to a rotor, a first washing and shrinking shaft rotatably disposed on an outer circumferential surface of the first washing shaft, a second washing shaft connected to the pulsator, A second dehydrating shrinking device disposed rotatably on an outer circumferential surface of the shaft and connected to the washing tub; a second dehydrating shaking device disposed between the first washing shaking shaft and the second washing shaking shaft and between the first dehydrating shaker and the second dehydrating shaker, A first bearing for rotatably supporting the first dewatering shaft and a second bearing for rotatably supporting the second dewatering shaft, wherein the second bearing is configured such that the pulsator is rotated in one direction And is rotatable in both directions so that the washing tub can be rotated in a direction opposite to the pulsator when rotated.

The first bearing may be a bearing capable of bi-directional rotation so that the first dehydration shrinkage can be bi-directionally rotated.

Wherein the clutch unit further comprises a clutch gear disposed on an outer circumferential surface of the first dewatering shaft and a clutch gear engaged with the clutch gear to stop rotation of the first dewatering shaft A clutch bushing is provided between an inner surface of the torsion spring and an outer peripheral surface of a first dewatering shaft. The clutch bushing includes a clutch coupler, a clutch lever to which the clutch coupler is fixed to operate the clutch coupler, .

Wherein the stator includes a stator core, a bobbin wrapped around an outer circumferential surface of the stator core, a coil wound around the bobbin, and a stator support integrally formed with the stator core, And then integrally formed with the stator core by insert molding.

Wherein the rotor includes a rotor support, an outer magnet disposed on the outer side of the rotor support, and an inner magnet disposed on the inner side of the rotor support, wherein the rotor magnet supports the outer magnet and the inner magnet, . &Lt; / RTI >

The first bearing is installed between the first dehydrating shrinkage and the inner surface of the housing to rotatably support the first dewatering shaft and the second bearing is installed between the second dehydrating shrinkage and the support frame fixed to the outer tank And the second dewatering shaft can be rotatably supported.

A method of controlling a washing machine driving apparatus according to the present invention includes the steps of rotating a rotor in one direction, controlling rotation of a ring gear of a planetary gear set by a second bearing to transfer rotational force of the rotor to a pulsator, And maintaining the rotational speed of the pulsator and the rotational speed of the washing tub rotating in the direction opposite to the pulsator at a predetermined ratio.

The step of controlling the RPM of the rotor includes the steps of measuring the rotational speed of the pulsator, measuring the rotational speed of the washing tub, and controlling the RPM of the rotor according to the rotating speed of the pulsator and the rotational speed of the washing tub Step < / RTI >

As described above, in the washing machine driving apparatus of the present invention, the bearing supporting the dewatering shaft connected between the washing gear and the ring gear of the planetary gear unit is rotated in both directions to allow the washing tub to rotate freely during the pulsator rotation, So that various washing water streams can be formed.

1 is a sectional view of a washing machine according to an embodiment of the present invention.
2 is a cross-sectional view of a washing machine driving apparatus according to an embodiment of the present invention.
3 is a block diagram illustrating a method of controlling a washing machine driving apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. Definitions of these terms should be based on the content of this specification.

Referring to FIG. 1, a washing machine according to an embodiment of the present invention includes an outer case 100, an outer tub 110 installed inside the case 100 to store laundry therein, And a pulsator 130 rotatably installed on the bottom surface of the washing tub 120. The washing tub 120 rotatably disposed on the washing tub 120 performs washing and dewatering processes.

A lid 140 connected to the case 100 is installed on the upper portion of the washing machine and a drain pipe 150 for discharging the washing water when the rinse or dewatering is installed on the lower portion of the outer tub 110. A driving unit 160 for driving the washing tub 120 and the pulsator 130 is installed below the outer tub 110. [

Referring to FIG. 2, the driving device 160 according to an embodiment includes a housing 20 fixed to the outer tub 110, a stator 90 fixed to the housing 20, an outer peripheral surface of the stator 90, A rotor 80 disposed on the inner circumferential surface with a predetermined gap to rotate the pulsator 130 and the washing tub 120 and a rotor 80 installed on the lower portion of the outer tub 110 to selectively drive the washing tub 120 and the pulsator 130 And a planetary gear set 50 for increasing the torque by reducing the rotational speed of the rotor 80. The planetary gear set 50 is a planetary gear set,

The stator 90 includes a stator core 92, a bobbin 96 wrapped around the outer circumferential surface of the stator core 92, a coil 94 wound around the bobbin 96, and an insert molded by thermosetting resin And a stator support 98 integrally formed with the stator core 92.

The stator support 98 is integrally formed with the stator core by insert molding using a BMC (Bulk Molding Compound) molding material or the like, and is fixed to the housing 20. [

The rotor 80 is a double rotor type and includes a rotor support body 86 coupled to the first washing shaft 22, an outer magnet 82 disposed outside the rotor support body 86, And an inner magnet 84 disposed inside.

The rotor 80 is manufactured by integrally molding the outer magnet 82 and the inner magnet 84 integrally with the rotor support 86 in a state where the mold is inserted. At this time, since the rotor support body 86 is formed of a plastic material, the weight can be reduced and the manufacturing cost can be reduced as compared with the case of insert molding using a conventional BMC (Bulk Molding Compound) molding material.

A connecting member 85 made of metal is formed on the inner side of the rotor support body 86 and the connecting member 85 is fixed to the first washing shaft 22.

And the bolt 21 is fastened to the first washing shaft 22 to fix the connecting member 85 to the first washing shaft 22.

The rotor 80 may be of a single rotor type in which a constant gap is provided on the outer surface of the stator in addition to the double rotor type described above.

The rotor 80 is connected to the first washing shaft 22 and the first washing shaft 22 is disposed on the outer circumferential surface thereof with a first dehydrating shaft 24 rotatable relative to the first washing shaft 22, The second dehydrating shafts 28 connected to the second washing shafts 26 and rotatably disposed on the outer circumferential surface of the second washing shafts 26 and fixed to the lower surface of the washing tub 120, .

A planetary gear set 50 is installed between the first washing shaft 22 and the second washing shaft 26 and between the first and second shrinking shafts 24 and 28.

A support frame 60 is fixed to a lower surface of the outer tub 110 and a housing 20 is fastened to the support frame 60.

The planetary gear set 50 includes a sun gear 52 connected to an end portion of the first washing shaft 22, a planetary gear 54 meshed with the sun gear 52, and a planetary gear 54 meshed with the planetary gear 54 A ring gear 56 to which the first dehydrating shrink 24 and the second dehydrating shrink 28 are connected and a carrier to which the rotary shaft 57 of the planetary gear 54 is connected and connected to the second washing shaft 28 58).

Here, the gear ratio of the planetary gear set 50 is set according to the number of teeth of the sun gear 52 and the planetary gear 54. [ Accordingly, the planetary gear set 50 decelerates the rotational force of the rotor 80 in accordance with the set gear ratio, and transmits the decelerated torque to the pulsator 130.

The clutch unit 14 includes a clutch gear 62 provided on the outer circumferential surface of the first descent shaft 24 and a clutch coupler 64 engaged with the clutch gear 62 to stop the rotation of the first descent shaft 24, And a clutch lever 66 for fixing the clutch coupler 64 to operate the clutch coupler 64. [

The clutch lever 66 is rotatably supported on a hinge shaft fixed to the housing 20 and a spring 70 is provided on the hinge shaft 72 to provide an elastic force to the clutch lever 66.

A torsion spring 74 for providing elasticity is disposed on the inner surface of the clutch gear 62 and a clutch bushing is provided between the inner surface of the torsion spring and the outer peripheral surface of the first dehydration shrink 24.

When the operating lever 68 is operated, the clutch unit 14 is rotated in one direction to overcome the elastic force of the torsion spring 74 and the clutch coupler (not shown) provided at the end of the clutch lever 66 64 are separated from the clutch gear 62. The rotational force of the driving motor 10 is simultaneously transmitted to the washing shafts 22 and 26 and the dehydrating shafts 24 and 28 so that the washing tub 120 and the pulsator 130 are simultaneously rotated to perform the dewatering stroke.

A first sleeve bearing 30 is provided between the first washing shaft 22 and the first dehydrating shrink 24 so that the first washing shank 22 and the first washing shrinkable shaft 24 can rotate relative to each other And a first bearing 32 is provided between the first dehydrating shrink 24 and the inner surface of the housing 20 to rotatably support the first dehydrating shrink 24.

An oil-less type second sleeve bearing 34 is provided between the second washing shaft 26 and the second dehydrating shrink 28 so that the second washing shafts 26 and the second shrinking shafts 28 are rotated relative to each other And a second bearing 36 is provided between the second dehydrating shrink 28 and the support frame 60 to rotatably support the second dehydrating shrink 28.

Here, the first bearing 32 is a bi-directionally rotatable ball bearing that supports the first dehydrating shafts 24 so as to be bi-directionally rotatable.

The second bearing 36 is bi-directionally rotatable and supports the second dehydrating shafts 36 so that the second dehydrating shafts 36 can rotate in both directions.

As described above, in the driving apparatus of the present invention, since there is no brake system for interrupting the ring gear, the washing tank connected to the ring gear by the second dehydrating and shrinking mechanism is freely rotatable in both directions.

Therefore, when the pulsator is rotated at the time of the washing stroke, a rotational force opposite to the rotational direction of the pulsator is applied to the ring gear, whereby the washing tub is rotated in the direction opposite to the pulsator to enable bi-directional driving.

The operation of the washing machine driving apparatus of the present invention thus constructed will be described below. 3 is a block diagram of a control unit of a washing machine driving apparatus according to an embodiment of the present invention.

First, when the rotor 80 is rotated during the washing operation, the first washing shaft 22 to which the rotor 80 is connected is rotated. The rotation of the first washing shaft 22 is transmitted to the second washing shaft 26 through the planetary gear set 50 and is transmitted to the second washing shaft 26. When the second washing shaft 26 rotates, The pulsator 130 connected to the pulsator 130 is rotated.

At this time, the ring gear 56 of the planetary gear set 50 is connected to the second dehydrating shafts 28, the second dehydrating shafts 28 are supported by the second bearings 36, and the second bearings 36, A bi-directional bearing capable of bi-directional rotation is used, so that the washing tub 120 connected to the second dehydrating shafts 28 rotates in a direction opposite to the pulsator 130 to enable bi-directional driving.

That is, the rotational force of the first washing shaft 22 is input to the sun gear 52 and output to the carrier 54, the second washing shaft 26 connected to the carrier 54 is rotated, and the second washing shaft 26 And the blower 130 connected to the blower 130 is rotated in one direction.

At this time, due to the nature of the planetary gear, the ring gear 56 is rotated in the direction opposite to the direction of the carrier 54, and when the pulsator 130 is rotated in one direction, the action of the planetary gear set 50, Is rotated in the opposite direction to the pulsator 130 is performed.

That is, when the rotational force of the first washing shaft 22 is input to the sun gear 52 and output to the carrier 54, the ring gear 56 acts to rotate in the direction opposite to the carrier 54. The second dehydrating shaft 28 connected to the ring gear 56 is rotated in the opposite direction to the second washing shaft 26 and the washing tub 120 connected to the second dehydrating shaft 28 is connected to the pulsator 130, As shown in FIG.

When the pulsator 130 rotates in one direction, a force is applied to the washing tub 120 to rotate in the direction opposite to the pulsator 130 so that the pulsator 130 and the washing tub 120 rotate in opposite directions It is possible to realize a bi-dynamic force and improve the washing efficiency.

At this time, the control unit 300 controls the rotating speed of the pulsator 130 and the rotating speed of the washing tub 120 to be rotated at the same rate. That is, when the signal from the first sensor 310 measuring the rotational speed of the pulsator 130 and the signal from the second sensor 320 measuring the rotational speed of the washing tub 120 are applied to the control unit 300, The unit 300 controls the RPM of the rotor 80 so that the pulsator 130 and the washing tub 120 can rotate uniformly at the same rate.

When the washing cycle is completed, a rinse cycle and a dewatering cycle are performed.

During the rinsing and dewatering steps, the clutch unit 14 is operated to rotate the first washing shaft 22 and the first dewaxing shaft 24 simultaneously. The rotational force of the first washing shaft 22 and the first dehydrating shafts 24 is transmitted to the second washing shafts 26 and the second shrinking shafts 28 through the planetary gear set 50, The pulsator 130 connected to the first dehydrating shafts 26 and the washing tub 120 connected to the second dehydrating shafts 28 are simultaneously rotated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the embodiments set forth herein. Various changes and modifications may be made by those skilled in the art.

14: clutch unit 20: housing
22: first washing shaft 24: first washing shrinkage
26: second washing shaft 28: second dehydrating shaft
32: first bearing 36: second bearing
50: planetary gear set 62: clutch gear
66: clutch lever 80: rotor
82: outer magnet 84: inner magnet
86: rotor support 90: stator
92: stator core 94: coil
96: bobbin 98: stator support
120: washing tub 130: pulsator

Claims

A first washing shaft connected to the rotor;
A first dehydrating shank rotatably disposed on an outer circumferential surface of the first washing shank;
A second washing shaft to which the pulsator is connected;
A second dehydrating shank rotatably disposed on an outer circumferential surface of the second washing shank and connected to the washing tub;
A planetary gear set which is provided between the first washing shaft and the second washing shaft and between the first dehydrating shaft and the second dehydrating shaft to reduce the rotational speed;
A first bearing rotatably supporting the first dewatering shaft; And
And a second bearing rotatably supporting the second dewatering shaft,
Wherein the second bearing is a bearing capable of bi-directional rotation so that the washing tub is rotated in a direction opposite to the pulsator when the pulsator is rotated in one direction during a washing stroke.

The method according to claim 1,
Wherein the first bearing is a bearing capable of bi-directional rotation so that the first dehydrating and shrinking can be rotated in both directions.

The method according to claim 1,
Further comprising a clutch unit that interlocks the washing tub and the pulsator to selectively drive the washing tub and the pulsator.

The method of claim 3,
The clutch unit includes: a clutch gear installed on an outer peripheral surface of the first dewatering shaft;
A clutch coupler coupled to the clutch gear to stop rotation of the first dewatering shaft;
A clutch lever to which the clutch coupler is fixed to operate the clutch coupler; And
And a clutch bushing disposed on an inner surface of the clutch gear and disposed between an inner surface of the torsion spring and an outer peripheral surface of the first dewatering shaft.

The method according to claim 1,
Wherein the stator includes a stator core, a bobbin wrapped around the stator core, a coil wound around the bobbin, and a stator support integrally formed with the stator core,
Wherein the stator support body is integrally formed with the stator core by insert molding after the divided core type stator core is annularly arranged in a mold.

The method according to claim 1,
Wherein the rotor comprises a rotor support, an outer magnet disposed on the outer side of the rotor support, and an inner magnet disposed on the inner side of the rotor support,
Wherein the rotor support is manufactured by inserting the outer magnet and the inner magnet into a mold and performing insert molding.

The method according to claim 1,
Wherein the first bearing is installed between the first dehydrating shrinkage and the inner surface of the housing to rotatably support the first dewatering shaft,
Wherein the second bearing is installed between the second dehydrating shrinkage and the supporting frame fixed to the outer tub to support the second dewatering shaft in a rotatable manner.

An outer tank for storing washing water;
A washing tub rotatably disposed in the tub;
A pulsator rotatably installed on a bottom surface of the washing tub;
The washing machine according to any one of claims 1 to 7, which simultaneously or selectively drives the washing tub and pulsator.

Rotating the rotor in one direction;
Interrupting the ring gear of the planetary gear set by the second bearing to transmit the rotational force of the rotor to the pulsator; And
And controlling the RPM of the rotor to maintain the rotational speed of the pulsator and the rotational speed of the washing tub rotating in a direction opposite to the pulsator at a predetermined ratio.

10. The method of claim 9,
The step of controlling the RPM of the rotor may include measuring the rotational speed of the pulsator,
Measuring the rotational speed of the washing tub;
And controlling the RPM of the rotor according to the rotating speed of the pulsator and the rotating speed of the washing tub.