WO2014098473A1 - Washing machine driving apparatus and washing machine comprising same - Google Patents

Abstract

The washing machine driving apparatus according to the present invention comprises: an outer shaft connected to a wash tub; an inner shaft rotatably disposed inside the outer shaft and connected to a pulsator; an outer rotor connected to the inner shaft; and a stator disposed between an inner rotor and the outer rotor having a gap therebetween. The outer shaft has one end thereof connected to the wash tub and the other end thereof connected to the inner rotor so as to directly connect the wash tub to the inner rotor. The inner shaft has one end thereof connected to the pulsator and the other end thereof connected to the outer rotor so as to directly connect the pulsator to the outer rotor. Accordingly, the present invention can remove a conventional clutch and thus can reduce the cost of manufacture, simplify the process of manufacture, and reduce the height of a washing machine.

Description

Driving device for washing machine and washing machine having same

The present invention relates to a washing machine and a washing machine having a washing tank and a pulsator directly connected to the driving device and capable of driving the washing tank and the pulsator, respectively, without a separate intermediate medium.

Conventional washing machine is disclosed in the Republic of Korea Patent Publication No. 10-0548310 (January 24, 2006), the outer case forming the appearance, the outer tub that is supported inside the outer case to accommodate the wash water therein, and Washing and dehydration combined inner tub that is accommodated rotatably inside the outer tub, a pulsator installed to rotate relative to the inner tub to form a water flow and generating a driving force for rotating the inner tub and the pulsator A drive motor, an inner tank rotating shaft for rotating the inner tank receiving the driving force of the driving motor, a pulsator rotating shaft for rotating the pulsator receiving the driving force of the driving motor, and a sun gear connected to the driving motor and connected to the pulsator rotating shaft And a plurality of planetary gears meshing with the sun gear and the ring gear at the same time, a carrier supporting the planetary gears in a rotating and processable manner, and when washing The clutch is configured to include a clutch for controlling the rotation of the inner tank and the pulsator during dehydration.

Such a conventional washing machine is equipped with a planetary gear device composed of a sun gear, a ring gear, a planetary gear and a carrier, and decelerates the rotational force of the driving motor and transmits it to the pulsator and the inner tank, and the clutch spring is operated to selectively select the pulsator and the inner tank. It transmits power to rotate the pulsator only or to rotate the pulsator and the inner tank at the same time.

However, the conventional washing machine requires a planetary gear device, a clutch, and the like to selectively rotate the pulsator and the inner tank, so that the configuration is complicated and manufacturing costs increase.

In addition, in the conventional washing machine, since the planetary gear device and the clutch are installed between the driving motor and the outer tank, the space occupying in the height direction of the washing machine increases, and accordingly, the height of the washing machine is increased or when the washing machine height is the same, the height of the inner tank is increased. There is a problem that the washing capacity is reduced because it needs to be reduced.

In addition, the conventional washing machine has a problem that the pulsator and the inner tank can be rotated in the same direction and the pulsator and inner tank can not be rotated in the opposite direction, the washing machine performance is reduced.

An object of the present invention to remove the existing clutch can reduce the manufacturing cost and simplify the manufacturing process, to provide a driving apparatus and a washing machine having the same to reduce the height of the washing machine.

It is another object of the present invention to provide a driving apparatus for a washing machine capable of rotating the pulsator and the washing tank at the same time in different directions and improving the performance of the washing machine, and a washing machine having the same.

It is another object of the present invention to minimize the power loss because the outer shaft is directly connected between the inner rotor and the pulsator, and the inner shaft is directly connected between the outer rotor and the washing tub, while the power is directly transmitted without a separate intermediate medium while simplifying the structure. It is to provide a driving device and a washing machine having the same.

Still another object of the present invention is to install a stator core in a bearing housing fixed to an outer tank, and thus, a separate process for forming a plurality of stator cores in an annular shape is unnecessary, so that the number of parts can be reduced and the washing machine can simplify the manufacturing process. To provide a driving device and a washing machine having the same.

Still another object of the present invention is to form a bearing housing and a stator integrally by insert injection to shorten the manufacturing process, reduce the number of parts, and further reduce the manufacturing cost, and for a washing machine capable of performing the waterproof function of the stator. It is to provide a drive motor and a washing machine having the same.

Still another object of the present invention is to provide a driving motor for a washing machine capable of shortening a manufacturing process by integrally forming an outer rotor and an inner rotor by insert injection, and a washing machine having the same.

The driving device of the washing machine of the present invention includes an outer shaft connected to a washing tub, an inner shaft rotatably disposed in the outer shaft, and connected to a pulsator, an inner rotor connected to the outer shaft, and the inner shaft. And a stator disposed with a gap between the inner rotor and the outer rotor, wherein the outer shaft has a washing tank connected to one end and an inner rotor connected to the other end to directly connect between the washing tank and the inner rotor. In addition, the inner shaft has a pulsator connected to one end and an outer rotor connected to the other end to directly connect between the pulsator and the outer rotor.

The outer shaft of the present invention is rotatably supported by the first bearing and the second bearing, the first bearing is fixed to the first bearing housing, the second bearing is fixed to the second bearing housing, and the first bearing The bearing housing and the second bearing housing can be fixed to the outer tub.

A first seal may be mounted between the bearing housing and the outer shaft of the present invention, and a second seal may be mounted between the outer shaft and the inner shaft to prevent leakage of the wash water.

The outer shaft of the present invention is formed in a hollow shape, the first shaft is formed on the outer circumferential surface is connected to the inner rotor housing, the second connecting portion is press-fit fixed to the upper end of the first shaft and the washing tank is connected to the outer circumferential surface It may include a second shaft is formed.

The inner shaft of the present invention has a third connection portion at which the lower side thereof is drawn out from the lower end of the outer shaft and the outer rotor housing is connected, and an upper side thereof is formed at the upper end of the outer shaft and the fourth connection portion at which the pulsator is connected. A second fixing nut fixing the outer rotor housing may be fastened to a lower end of the inner shaft.

As described above, the driving device of the washing machine of the present invention directly connects the drive motor, the pulsator and the washing tank to remove the existing power conversion means, the clutch and the planetary gear device, thereby reducing the manufacturing cost and simplifying the manufacturing process. It is possible to increase the washing capacity while lowering the height of the washing machine.

In addition, the driving device of the washing machine of the present invention is directly connected between the pulsator and the outer rotor, and directly connected between the washing tank and the inner rotor, when only the outer rotor is driven, the pulsator is rotated, if only the inner rotor is driven, only the washing tank is rotated, The pulsator and the washing tub can be rotated in the same direction or in different directions at the same time, thereby improving the performance of the washing machine.

In addition, the driving device of the washing machine of the present invention, since the outer shaft is directly connected between the inner rotor and the pulsator, and the inner shaft is directly connected between the outer rotor and the washing tank, the power is directly transmitted without a separate intermediate medium while simplifying the structure. Minimize power loss, there is an advantage that can improve the performance of the washing machine.

In addition, the driving device of the washing machine of the present invention is to mount the stator core in an annular shape without a separate process by mounting a plurality of stator cores in a first bearing housing which is fixed to the outer tank and the first bearing is mounted to rotatably support the outer shaft. Since the stator can be fixed while arranging, parts for arranging the stator core in an annular shape and a separate stator support for fixing the stator core to the outer tank are not required, thereby reducing the number of parts and simplifying the manufacturing process. .

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

2 is a cross-sectional view of a driving apparatus of the washing machine according to the first embodiment of the present invention.

3 is a cross-sectional view of the inner shaft and the outer shaft according to the first embodiment of the present invention.

Figure 4 is a cross-sectional view showing another embodiment of the outer shaft according to the present invention.

5 is a half sectional view of a driving apparatus of the washing machine according to the first embodiment of the present invention.

6 is a lateral cross-sectional view of the stator according to the first embodiment of the present invention.

7 is a plan view of a stator according to a first embodiment of the present invention.

8 is a plan view of a stator core according to a first embodiment of the present invention.

9 and 10 show other embodiments of the connection of the stator core to the present invention.

11 is a cross-sectional view of a driving apparatus of a washing machine according to a second embodiment of the present invention.

12 is a half sectional view of a driving device of a washing machine according to a second embodiment of the present invention.

13 is a side view illustrating a process of winding a coil on a stator core according to the present invention.

14 is a plan view in which the stator core according to the invention is arranged radially.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this process, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms that are specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or operator. Definitions of these terms should be made based on the contents throughout the specification.

1 is a cross-sectional view of a washing machine according to a first embodiment of the present invention, Figure 2 is a cross-sectional view of the washing machine driving apparatus according to a first embodiment of the present invention.

1 and 2, the washing machine according to the first embodiment of the present invention includes a case 100 forming an external appearance, an outer tank 110 suspended from the case 100 to accommodate washing water, and A washing tank 120 rotatably disposed in the outer tub 110 to perform washing and dehydration, a pulsator 130 rotatably disposed in the washing tub 120 to form a washing stream, and a washing tank 120. It is installed in the lower portion of the includes a driving device 140 for driving the washing tank 120 and the pulsator 130 simultaneously or selectively.

As shown in FIG. 2, the driving device 140 includes an outer shaft 20 connected to the washing tub 120 and an inner rotatably disposed in the outer shaft 20 and connected to the pulsator 130. The inner rotor 40 connected to the shaft 30, the outer shaft 20, the outer rotor 50 connected to the inner shaft 30, the inner rotor 40, It includes a stator 60 disposed with a gap between the outer rotor (50).

On the outer circumferential surface of the outer shaft 20, the first bearing 70 and the second bearing 72 rotatably supporting the outer shaft 20 are disposed at a predetermined interval.

The first bearing 70 is supported by the first bearing housing 10, and the second bearing 72 is supported by the second bearing housing 56. The first bearing housing 10 and the second bearing housing 56 are fixed to the outer tub 110.

As illustrated in FIG. 3, the outer shaft 20 is formed in a cylindrical shape to allow the inner shaft 30 to pass therethrough, and includes a first shaft 22 and a first shaft 22 to which the inter rotor 40 is coupled. It is connected to the upper side of the washing tank 120 includes a second shaft 24 is coupled.

On the inner surface of the upper end of the first shaft 22 is formed a press-fitting groove 26 in which the lower end of the second shaft 24 is press-fitted, and a stepped portion 28 is formed on the outer side of the intermediate side to reduce the outer diameter. The first bearing 70 is mounted on the 28 to prevent the first bearing 70 from flowing up and down.

In addition, a first connection portion 210 to which the inner rotor housing 42 of the inner rotor 40 is fixed is formed below the portion where the first bearing 70 of the first shaft 22 is mounted, and the first connection portion Below the 210, a first fixing nut 74 is fixed to the inner rotor housing 42 to the first shaft 22.

Here, the second bearing 70 is inserted into the stepped portion 28 formed on the outer circumferential surface of the first shaft 22, the inner rotor housing 42 is connected by the first connecting portion 210, and the first fixing portion is fixed. When the nut 74 is tightened, the assembly is completed, so the assembly is easy. In addition, the first bearing 70 is inserted into the step portion 28 to prevent flow, and the inner rotor housing 42 is prevented from being separated from the first shaft 22 by the first fixing nut 74. Can be.

The lower end of the second shaft 24 is pressed into the press-fitting groove 26 of the first shaft 22 to be connected to the first shaft 22, and the second bearing 72 is inserted into the outer circumferential surface thereof. The upper outer circumferential surface of the portion in which the bearing 72 is inserted is formed with a second connection portion 220 connected to the coupling portion 122 formed at the center of the washing tank 110.

The second bearing 72 may prevent the second bearing 72 from being caught by the stepped portion 27 formed at the upper end of the first shaft 22.

The first connector 210 and the second connector 220 may be coupled to each other by forming a serration coupling, a spline coupling, or a key groove formed with protrusions on the outer surface of the first shaft 22.

If the first connector 210 and the second connector 220 can connect the inner rotor housing 42 and the washing tub 110 to the outer surface of the first shaft 22 in addition to the structure described above, any structure is applicable. It is possible.

The inner shaft 30 is rotatably disposed on the inner surface of the outer shaft 20, and a lower end thereof is drawn out from the lower end of the outer shaft 20 to form a third connection part 280 to which the outer rotor housing 52 is connected. At the lower end, a second fixing nut 76 is fastened to prevent the outer rotor housing 52 from being separated. The upper end of the inner shaft 30 is drawn out of the upper end of the outer shaft 20 to form a fourth connection part 290 to which the pulsator 130 is connected.

Here, the third connection portion 280 and the fourth connection portion 290 are formed by forming projections on the outer surface of the inner shaft 30, the outer rotor housing 52 and the pulsator 130, Serration It may have a structure that is keyed to each other by forming a bond, a spline bond or a key groove.

The first sleeve bearing 80 and the second sleeve bearing 82 are fixed to the upper inner circumferential surface and the lower inner circumferential surface of the outer shaft 20, respectively, and the inner shaft is fixed to the first sleeve bearing 80 and the second sleeve bearing 82. 30 is rotatably supported.

And, the upper outer peripheral surface of the inner shaft 30 is coupled to the departure prevention ring 84, the departure prevention ring 84 prevents the separation of the first sleeve bearing (80).

4 is a cross-sectional view of another embodiment of an outer shaft according to the present invention.

The outer shaft 20 according to another embodiment has a hollow shape such that the inner shaft 30 is rotatably supported therein, and has a first connection part to which the inner rotor housing 42 of the inner rotor 40 is connected to a lower outer circumferential surface thereof. 210 is formed, the upper outer peripheral surface is formed with a second connecting portion 220 to which the washing tank 120 is connected, the outer diameter enlarged portion 23 is formed in the center side the outer diameter is increased.

The first stepped portion 25 and the second stepped portion 27 are formed at the lower end and the upper end of the outer diameter expanding portion 23, respectively, and the first bearing 70 is supported by the first stepped portion 25. Thus, the first bearing 70 is prevented from flowing, and the second stepped portion 27 is supported by the second bearing 72 to prevent the second bearing 72 from flowing.

The outer shaft 20 described in the above embodiment is a structure that is separated into the first shaft 22 and the second shaft 24, the outer shaft 20 according to another embodiment has a structure formed as one.

As shown in FIG. 5, the first bearing housing 10 is integrally formed by a mold with a resin material, and has a disc part 410 formed in a disc shape and a downward direction from the inside of the disc part 410. The bearing mounting part 420 is bent and the first bearing 70 is mounted, and the outer tank fixing part 430 is bent upward from the outer side of the disc part 410 and fixed to the outer tank.

The disc portion 410 is provided with a plurality of first fastening holes 14 in which a plurality of stator cores 62 are mounted at regular intervals in the circumferential direction, and the outer shell fixing portion 430 has bolts (or bolts) in the outer shell 110. A plurality of second fastening holes 16 for fastening with 48 are formed.

The second bearing housing 56 is formed of a metal material, and is formed in the center of the opening to be mounted on the bearing mounting portion 230 to which the second bearing 72 is mounted, and bent upward from the bearing mounting portion 230 to seal the first seal. The outer shell fixing part 250 in which the seal mounting part 240 to which the 260 is mounted and the third fastening hole 18 which are bent downward from the seal mounting part 240 and fastened to the outer tub 110 by the bolt 48 are formed. ).

Further, a fourth fastening hole 19 is further formed outside the third fastening hole 18 of the second bearing housing 56, and the bolt 49 is formed in the outer tub 110 through the fourth fastening hole 19. Is fastened to the second bearing housing 56 can be fixed to the outer tub 110 more firmly.

Here, an opening is formed in the center of the outer tub 110, the second bearing housing 56 passes through the opening of the outer tub 110 to contact the rear surface of the outer tub 110, and contacts the first bearing housing 10. After being laminated to the second bearing housing, it is fastened to the outer tub 110 by one bolt 48.

That is, the first bearing housing 10 and the second bearing housing 56 are arranged to be stacked on the rear surface of the outer tub 110, and then the second fastening hole 16 and the second bearing housing of the first bearing housing 10 are disposed. By passing the bolt 48 through the third fastening hole 18 of the 56 and fastening to the outer tub 110, the first bearing housing 10 and the second bearing housing 56 with one bolt 48. Can be fastened to the outer tub 110 at the same time to improve the assembly.

A first seal 260 is installed between the second bearing housing 56 and the outer surface of the outer shaft 20 to prevent the wash water from leaking, and the upper inner surface of the outer shaft 20 and the upper end of the inner shaft 30 are mounted. A second seal 270 is installed between the outer surfaces to prevent the wash water from leaking.

The inner rotor 40 includes an inner rotor housing 42 and a first magnet 44 fixed to an outer surface of the inner rotor housing 42. The inner rotor housing 42 is formed in a disc shape having an open center, and a first magnet 44 is fixed to an outer surface thereof, and an inner surface thereof is connected to the first connection portion 210 of the outer shaft.

The outer rotor 50 is fixed to the outer rotor housing 52 and the second magnet 54 fixed to the outer inner surface of the outer rotor housing 52 and disposed to face the outer surface of the stator 60 at a predetermined gap. Include. The outer rotor housing 52 has a second magnet 54 fixed to the outer inner surface thereof, the inner surface of which is connected to the third connector 280 of the inner shaft 30.

Here, the inner rotor housing 42 and the outer rotor housing 52 are preferably formed of a magneto forming material so that the magneto can be formed without a back yoke.

6 is a cross-sectional view of the stator according to the first embodiment of the present invention, Figure 7 is a cross-sectional view of the stator core according to the first embodiment of the present invention, Figure 8 is a stator core according to the first embodiment of the present invention Top view of the.

The stator 60 includes a plurality of stator cores 62 arranged radially, a bobbin 64 which is a nonmagnetic material wrapped around the outer circumferential surface of the stator core 62, and a first coil wound on one side of the stator core 62. 66 and a second coil 68 wound on the other side of the stator core 62.

Here, the first coil 66 is applied with a first power source (ie, a driving signal), and the second coil 68 is applied with a second power source (ie, a driving signal). When only the first power is applied, only the inner rotor 40 is rotated. When only the second power is applied to the second coil 68, only the outer rotor 50 is rotated, and the first coil 66 and the second coil 68 are rotated. When the first and second power is simultaneously applied to the inner rotor 40 and the outer rotor 50 are rotated at the same time.

The stator core 62 has a first tooth portion 310 on which the first coil 66 is wound, and a second tooth portion on which the second coil 68 is wound on the opposite side of the first tooth portion 310. 312, a partition 314 partitioning between the first and second teeth 310 and 312, and formed at both lateral ends of the partition 314 between the cores 62. It includes a coupling unit (320,322) for interconnecting the.

The first flange portion 316 disposed to face the first magnet 44 is formed at the end of the first tooth portion 310, and the second magnet 54 is formed at the end of the second tooth portion 312. A second flange portion 318 is disposed to face the formation.

The first flange portion 316 and the second flange portion 318 are inwardly cured to correspond to the first magnet 44 of the inner rotor 40 and the second magnet 54 of the outer rotor 50, respectively. And outwardly curved surfaces. Therefore, since the roundness of the inner circumferential surface and the outer circumferential surface of the stator core 62 is increased, the magnetic gap is constant while the inner circumferential surface and the outer circumferential surface of the stator 60 are close to each other while the first magnet 44 and the second magnet 54 are close to each other. Can be maintained.

In addition, a through hole 332 through which the fixing bolt 330 passes is formed in the center of the stator core 62, that is, the partition 314.

Here, the bolt 330 is fastened to the first fastening hole 14 formed in the first bearing housing 10 through the through hole 332 to fix the stator core 62 to the first bearing housing 10. It plays a role.

That is, after arranging the stator core 62 in the circumferential direction to the first bearing housing 10, the fixing bolt 330 passes through the through hole 332 formed in the stator core 62, and then the first bearing housing 10. When fastened to the first fastening hole 14 formed in the), the stator core 62 may be arranged in an annular shape and fixed.

As such, when the stator cores 62 are arranged at a predetermined interval in the circumferential direction to the first bearing housing 10 and then fastened with the fixing bolts 330, the assembly is completed, and the first bearing housing 10 has an outer tub ( 110 is fastened by bolts 48 so that the parts and assembly process for arranging the existing stator cores in an annular shape and the parts and assembly processes for fixing the stator are unnecessary, thereby reducing the assembly process and reducing the number of parts. Can be saved.

As described above, the fastening structure between the stator core 62 and the first bearing housing 10 may be integrally formed by insert molding, in addition to the fastening bolt 330.

Between the stator cores 22 should have a structure directly connected to each other to form a magnetic circuit. Accordingly, the coupling parts 320 and 322 have a structure directly connected to allow the stator cores 22 to be energized with each other.

For example, the coupling parts 320 and 322 are formed such that the coupling protrusion 322 protrudes on one side of the partition 16, and the coupling groove 320 into which the coupling protrusion 322 is fitted to the other side of the partition 314. ) Is formed, and when the coupling protrusion 322 is inserted into the coupling groove 320 to assemble, the stator cores 62 are radially arranged and have a structure directly connected to each other.

And, in addition to such a structure, as shown in FIG. 9, the pin member 90 forms pinholes 90 at both ends of the partition portion 314 of the stator core, and the pin member is in contact with each other between the cores 62. It is also possible to apply a structure in which the 92 is connected between the pinholes 90 of two cores to connect the cores 22, and as shown in FIG. 10, the cores 22 are in contact with each other. Caulking using the caulking member 94 in a state is also applicable.

The bobbin 64 has a first flange portion such that the first flange portion 316 and the second flange portion 318 of the stator core 62 are exposed to react with the first magnet 44 and the second magnet 54. The 316 and the second flange portion 318 are formed to be wrapped around the outer circumferential surface of the remaining stator core 62. That is, the bobbin 64 is formed on the outer circumferential surface of the stator core 62 by insert molding and insulates the stator core 62 from the first coil 66 and the second coil 68.

The driving device of the present invention forms a first magnetic circuit L1 between one side of the stator 60 on which the inner rotor 40 and the first coil 66 are wound, and the outer rotor 50 and the second coil. Since the second magnetic circuit L2 is formed between the other sides of the stator 60 to which the 68 is wound to form a pair of magnetic circuits that are independent of each other, the inner rotor 40 and the outer rotor 50 are driven separately, respectively. Can be.

In detail, the first magnetic circuit L1 includes the first magnet 44 of the N pole, the first tooth portion 310 on which the first coil 66 is wound, the inner portion of the partition 314, and the N pole of the first magnetic circuit L1. Via the first magnet 44 and the inner core housing 42 of the S pole adjacent to the first magnet 44.

In addition, the second magnetic circuit (L2) is the second magnet portion 54 of the N pole, the second teeth portion 312, the second coil (68) wound around the N pole, 54 Via the outer portion of the portion 314, the second magnet 54 of the S pole, and the outer rotor housing 52.

11 is a cross-sectional view of a washing machine driving apparatus according to a second embodiment of the present invention, Figure 12 is a half sectional view of the washing machine driving apparatus according to a second embodiment of the present invention.

The driving device 140 according to the second embodiment includes an outer shaft 20 connected to the washing tub 120 and an inner shaft rotatably disposed in the outer shaft 20 and connected to the pulsator 130. 30, an inner rotor 40 connected to the outer shaft 20, an outer rotor 50 connected to the inner shaft 30, an inner rotor 40, and an outer rotor 40. And a stator 60 disposed with a gap therebetween.

On the outer circumferential surface of the outer shaft 20, the first bearing 70 and the second bearing 72 rotatably supporting the outer shaft 20 are disposed at a predetermined interval.

The first bearing 70 is supported by the first bearing housing 10, and the second bearing 72 is supported by the second bearing housing 80. The first bearing housing 10 and the second bearing housing 80 are fixed to the outer tub 110.

The outer shaft 20 is formed in a cylindrical shape to allow the inner shaft 30 to pass therethrough, and is connected to the first shaft 22 to which the inter rotor 40 is coupled, and the upper side of the first shaft 22, and the washing tank 120. ) Is coupled to the second shaft 24, the same as the structure of the outer shaft 20 described in the above embodiment.

The inner shaft 30 is also the same as the structure of the inner shaft 30 described in the above embodiment.

The first bearing housing 10 is formed integrally with the stator core 62 by insert molding after arranging the stator core 62 at a predetermined interval in the circumferential direction.

That is, the first bearing housing 10 is molded by an insert molding method by molding with a thermosetting resin, for example, a BMC (Bulk Molding Compound) molding material such as polyester, wherein the plurality of stator cores 62 are circumferentially formed in the mold. It is formed integrally arranged at regular intervals in the direction.

Here, the first bearing housing 10 may be integrally molded by insert injection with the stator core 62 in a state where a reinforcing material of a metal material is inserted to reinforce strength. At this time, the reinforcing material of the metal material may be applied to the iron material or aluminum material similar to the shape of the first bearing housing 10.

As described above, since the first bearing housing 10 is integrally formed with the stator core 62, a separate stator support for aligning the stator core 62 in the circumferential direction is unnecessary, and the stator core 62 is first mounted. Since the process of coupling to the bearing housing 10 is unnecessary, the manufacturing process can be shortened, the number of parts can be reduced, and further, the manufacturing cost can be reduced.

The stator 60 includes a plurality of stator cores 62 arranged in the circumferential direction, a bobbin 64 which is a nonmagnetic material wrapped around the outer circumferential surface of the stator core 62, and a first wound around one side of the stator core 62. The coil 66 and the second coil 68 wound on the other side of the stator core 62 are included.

The stator core 62 has a through hole 332 formed in the center thereof, and the through hole 332 is filled with a molding material when insert molding the first bearing housing 10 to form the stator core 62 and the first bearing housing. Strengthen the bond between (10).

Here, the through hole 332 may be formed as a long hole formed in the lateral direction so as not to interfere with the flow of the magnetic field, when the through hole 332 is formed integrally with the first bearing housing by the insert molding This form is also applicable.

The first bearing housing 10 includes a stator fixing part 13 wrapped around the outer surface of the stator core 62, and a bearing support part 15 extending from the inner surface of the stator fixing part 13 to support the first bearing 70. And an outer tub fixing portion 17 extending from an outer surface of the bearing support portion 15 and fixed to the outer tub 110.

The first bearing housing 10 includes a plurality of first protrusions 104 and a first protrusion 104 extending vertically from an upper surface of the stator fixing part 13 to be in contact with an inner surface of the second bearing housing 89. And a plurality of second protrusions 106 arranged at a predetermined interval and contacting a lower surface of the second bearing housing 89.

The first protrusion 104 and the second protrusion 106 are formed in plural at regular intervals in the circumferential direction on the upper surface of the stator fixing part 13.

Here, when assembling the first bearing housing 10 in which the stator core 62 is integrally formed in the outer tub 110, the first protrusion 104 contacts the inner surface of the second bearing housing 80 so that the first bearing housing 10 can be contacted. The left and right positions of the 10 are aligned, and the second protrusion 106 is in contact with the lower surface of the second bearing housing 80 to align the vertical position of the first bearing housing 10. Therefore, the first bearing housing 10 may be conveniently coupled to the outer tub 110, thereby improving assembly performance.

The stator fixing part 13 is sealed to the outer surface of the stator so as to perform a waterproof function of the stator.

A fastening hole is formed in the outer tub fixing part 17, and a bolt 49 passes through the coupling hole to be coupled to the outer tub 110 to fix the first bearing housing 10 to the outer tub 110.

The second bearing housing 89 is formed of a metal material, is formed in the center of the opening, and is supported by the bearing support portion 81 on which the second bearing 72 is supported, and bent upward from the bearing support portion 81 to seal the first seal. The seal mounting part 85 to which the 260 is mounted and the outer tank fixing part 87 which are bent downward from the seal mounting part 85 and fastened to the outer tank 110 by the bolt 49 are included.

A first seal 260 is installed between the second bearing housing 89 and the outer surface of the outer shaft 20 to prevent the wash water from leaking, and the upper inner surface of the outer shaft 20 and the upper end of the inner shaft 30. A second seal 270 is installed between the outer surfaces to prevent the wash water from leaking.

The inner rotor 40 includes a first magnet 44 disposed at a predetermined gap on the inner surface of the stator 60, a first back yoke 46 disposed on the rear surface of the first magnet 44, and insert molding. The inner rotor housing 42 is formed integrally with the first magnet 44 and the first back yoke 46.

Here, the inner rotor housing 42 is formed integrally with the first magnet 44 and the first back yoke 46 by molding with a thermosetting resin, for example, a BMC (Bulk Molding Compound) molding material such as polyester. . Therefore, the inner rotor 40 can have waterproof performance and can shorten the manufacturing process.

The inner rotor housing 42 is formed in a disc shape having an open center, and an inner surface thereof is connected to the first connection portion 210 of the outer shaft 20 to rotate like the outer shaft 20, and a first surface on the outer surface thereof. The magnet 44 and the first back yoke 46 are integrally formed.

The outer rotor 50 includes a second magnet 54 disposed at an outer surface of the stator 60 with a predetermined gap, a second back yoke 56 disposed at a rear surface of the second magnet 54, and an insert. An outer rotor housing 52 formed integrally with the second magnet 54 and the second back yoke 56 by molding.

Here, the outer rotor housing 52 is formed integrally with the second magnet 54 and the second back yoke 56 by molding with a thermosetting resin, for example, a BMC (Bulk Molding Compound) molding material such as polyester. . Thus, the outer rotor 50 can have waterproof performance and can shorten the manufacturing process.

The outer rotor housing 52 is formed in a disc shape having an open center, and an inner surface thereof is connected to the third connecting portion 230 of the inner shaft 30 to rotate together with the inner shaft 30, and on the outer surface of the outer rotor housing 52. The magnet 54 and the second back yoke 56 are integrally formed.

The stator 60 has the same structure as the stator 60 described in the above embodiment.

Thus, the stator manufacturing process of this invention comprised is demonstrated below.

FIG. 13 is a side view illustrating a process of winding a coil to a stator core according to an embodiment of the present invention, and FIG. 14 is a plan view of the stator core arranged radially according to an embodiment of the present invention.

First, the stator core 62 is formed by stacking a plurality of iron pieces and then insert molding to wrap the bobbin 64 on the outer circumferential surface of the stator core 62.

Thereafter, a coil winding process is performed in which the first coil 66 is wound around the first tooth part 310 of the stator core 62 and the second coil 68 is wound around the second tooth part 312. do.

Looking at the coil winding process, the stator cores 62 are aligned. That is, the first teeth 310 and the second teeth 312 are aligned horizontally in a row, and the stator cores 62 are fixed to be horizontally aligned using the core alignment jig 172. Here, the jig for connecting the core 172 is preferably a magnet jig to which the stator core 62 is attached to both sides to fix the stator cores 62 with magnetic force.

As such, when the alignment of the stator cores 62 is completed, the first coil 66 is wound around the outer circumferential surface of the first tooth part 310 by using a continuous winding device and at the same time as the outer circumferential surface of the second tooth part 312. The second coil 68 is wound. At this time, the first coil 66 and the second coil 68 are respectively wound two different coils are wound around the first teeth portion 310 and the second teeth portion 312, respectively.

At this time, the stator core 62 is wound around the first tooth part 310 because the first tooth part 310 and the second tooth part 312 are partitioned by the partition part 314. And the second coil 68 wound on the second tooth part 312 may be wound in a state in which they are separated from each other.

When the winding of one stator core 62 is completed, the coil winding is successively performed in succession to the adjacent cores 62. That is, the first coil 66 is wound around the outer circumferential surface of the first tooth portion 310 of the core 62 which is disposed adjacent to each other, and the second coil 68 is formed on the outer circumferential surface of the second tooth portion 312. Winding. At this time, the core and the core should have some margin when arranged radially, so that the first coil 66 is connected to the first jump line 162, and the second coil 68 is connected to the second jump line 164. Is connected.

By repeating this process, coils are continuously wound around the plurality of stator cores 62, and in the case of three phases, three sets of core assemblies corresponding to each of the U, V, and W phases are manufactured.

As described above, in the coil winding method according to the present embodiment, when the first coil 66 is wound around the outer circumferential surface of the first tooth part 310, the second coil 68 is simultaneously applied to the outer circumferential surface of the second tooth part 312. Since the first coil 66 and the second coil 68 are wound at the same time because of the winding, productivity can be improved and manufacturing time can be shortened.

When the fabrication of the core assembly is completed in such a manufacturing process, as shown in FIG. 10, the divided cores of the U, V, and W phases are alternately arranged in turns. In this case, since the phase stator cores 62 are connected by jump lines 162 and 164, even when the three phase core assemblies are alternately arranged, the gaps between the core assemblies may be sufficiently increased.

After arranging the plurality of core assemblies radially and fastening the bolts 330 to the frame 10, the assembly of the stator is completed.

At this time, the bolt 330 is fastened to the fastening hole 14 of the frame 10 by passing through the through hole 332 formed in the stator core 62, thereby simplifying the assembly process. After the stator core 62 is radially arranged in the mold, the frame 10 may be integrally formed by insert injection.

Thus, the operation of the driving device of the washing machine according to an embodiment of the present invention is described below.

First, when driving only the pulsator 130 during washing, when the power is applied to the second coil 68, the outer rotor 50 is rotated, the inner shaft 30 connected to the outer rotor 50 is rotated to pulsate Rotate the data 130.

When the pulsator 130 and the dehydration tank 120 are rotated at the same time during dehydration and rinsing, power is simultaneously applied to the first coil 66 and the second coil 68. Then, the inner rotor 40 is rotated by the magnetic circuit L1, and the outer shaft 20 connected to the inner rotor 40 is rotated, thereby rotating the washing tub 120. Then, while the outer rotor 50 is rotated by the magnetic circuit L2, the inner shaft 30 connected to the outer rotor 50 is rotated to rotate the pulsator 130.

When the pulsator 130 and the washing tank 120 are rotated opposite to each other in order to remove the loosening stroke or the tangling of the laundry, the first coil 66 and the second coil 68 are supplied with power in opposite directions. Is authorized. Then, as the inner rotor 40 and the outer rotor 50 rotate in opposite directions, the pulsator 130 and the washing tub 120 rotate in opposite directions.

In the above description of the embodiment, the stator is divided into each slot by using a plurality of divided stator cores are coupled to each other, but each divided stator core has a partially divided structure including a plurality of slots or It is, of course, also possible that the stator core is formed of an integral core instead of being divided.

In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments, and the present invention is not limited to the spirit of the present invention. Various changes and modifications will be possible by those who have the same.

The present invention relates to a washing machine driving apparatus capable of driving a washing tub and a pulsator, respectively, without a separate intermediate medium because the washing tank and the pulsator are directly connected to the driving apparatus. The motor used in the washing machine driving apparatus includes a double rotor and a double stator. In the type, the inner rotor and the outer rotor may be connected to the pulsator and the washing tank of the washing machine, respectively, to independently drive the pulsator and the washing tank, thereby forming various washing water flows.

Claims (19)

An outer shaft connected to the washing tub; An inner shaft rotatably disposed in the outer shaft and connected to a pulsator; An inner rotor connected to the outer shaft; An outer rotor connected to the inner shaft; And It includes a stator disposed with a gap between the inner rotor and the outer rotor, The outer shaft is connected to the washing tank at one end and the inner rotor at the other end is directly connected between the washing tank and the inner rotor, The inner shaft is a pulsator is connected to one end, the outer rotor is connected to the other end of the driving device of the washing machine, characterized in that directly connecting between the pulsator and the outer rotor. The method of claim 1, The outer shaft is rotatably supported by a first bearing and a second bearing, the first bearing is fixed to the first bearing housing, the second bearing is fixed to the second bearing housing, and the first bearing housing. And a second bearing housing is fixed to the outer tank. The method of claim 2, A first seal is mounted between the bearing housing and the outer shaft, and a second seal is mounted between the outer shaft and the inner shaft to prevent leakage of wash water. The method of claim 1, The outer shaft is formed in a hollow shape, the first shaft is formed on the outer circumferential surface is connected to the inner rotor housing, the first shaft is formed by pressing the upper end of the first shaft and the second connecting portion is connected to the washing tank on the outer circumferential surface Driving device for a washing machine comprising a second shaft. The method of claim 4, wherein The first shaft is formed with a press-fitting groove in which the second shaft is press-fitted on the upper inner surface, a stepped portion is formed on the lower outer circumferential surface, a first bearing is supported on the stepped portion, and a first connection portion is connected to the inner rotor housing. And a first fixing nut for fixing the inner rotor housing is fastened. The method of claim 1, The inner shaft has a third connection portion which is drawn out from the lower end of the outer shaft and is connected to the outer rotor housing, and the upper side thereof is formed with a fourth connection portion which is drawn out from the top of the outer shaft and connected to the pulsator. Driving device of the washing machine, characterized in that the second fixing nut for fixing the outer rotor housing is fastened to the lower end of the inner shaft. The method of claim 1, The stator includes a plurality of split stator cores coupled to each other, a bobbin wrapped around an outer surface of the stator core, a first coil wound on one side of the stator core, and a second coil wound on the other side of the stator core. Driving device for a washing machine comprising a. The method of claim 7, wherein The stator core may include a first tooth portion around which a first coil is wound; A second tooth portion formed on an opposite side of the first tooth portion and wound with a second coil; A partition that partitions the first tooth portion and the second tooth portion; And a coupling part formed at both ends of the partition to interconnect the stator cores. The method of claim 8, The coupling unit is a driving device of the washing machine including a coupling protrusion formed on one side of the partition portion, the coupling groove formed on the other side of the partition portion is coupled to the coupling projection. The method of claim 8, The stator core has a through hole formed in the center thereof, and a fixing bolt is passed through the through hole and fastened to a first fastening hole formed in the first bearing housing. The method of claim 1, A first bearing and a second bearing are disposed on the outer circumferential surface of the outer shaft, the first bearing and the second bearing are mounted to the first bearing housing and the second bearing housing fixed to the outer tank. The first bearing housing is a drive device for a washing machine, characterized in that the stator fixing portion is fixed to the stator core is formed. The method of claim 11, The first bearing housing has a stator fixing part formed in a disk shape and having a first fastening hole for fixing the stator core in the circumferential direction; A bearing mounting part formed inside the stator fixing part to mount the first bearing; The driving device of the washing machine, characterized in that it comprises an outer tank mounting portion formed on the outside of the stator fixing portion mounted to the outer tank. The method of claim 11, The outer edges of the first bearing housing and the second bearing housing are disposed to be stacked on the rear surface of the outer tub, and the fixing bolt passes through the second fastening hole of the first bearing housing and the third fastening hole of the second bearing housing to the outer tub. Driving device for a washing machine, characterized in that fastened. The method of claim 1, A first bearing and a second bearing are mounted on an outer surface of the outer rotor, the first bearing is supported by a first bearing housing fixed to the outer tub, and the first bearing housing is integrally formed with the stator by insert injection. Drive of the washing machine, characterized in that. The method of claim 12, The first bearing housing is a driving device of the washing machine, characterized in that the stator and the insert is injected in the state in which the reinforcement of the metal material for strength reinforcement is inserted therein. The method of claim 12, The first bearing housing includes a stator fixing part surrounding an outer surface of the stator by insert molding, A bearing support portion extending from an inner surface of the stator fixing portion to support a first bearing; And an outer tub mounting portion extending from an outer surface of the stator fixing portion and mounted to the outer tub. The method of claim 1, The inner rotor is a first magnet disposed with a predetermined gap on the inner surface of the stator, A first back yoke disposed on the rear surface of the first magnet, And an inner rotor housing integrally formed with the first magnet and the first back yoke by insert molding and connected to the outer shaft. The method of claim 1, The outer rotor is a second magnet disposed with a predetermined gap on the outer surface of the stator, A second back yoke disposed on the rear surface of the second magnet, And an outer rotor housing integrally formed with the second magnet and the second back yoke by insert molding and connected to the inner shaft. Suspension supporting the suspension inside the case to accommodate the wash water; A washing tank rotatably disposed in the outer tub to perform washing and dehydration; A pulsator rotatably disposed in the washing tank to form a washing stream; And Washing machine driving device according to any one of claims 1 to 18 for driving the washing tank and the pulsator at the same time or selectively drive the washing tank and pulsator.

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