KR20030062556A - Direct drive type automatic washing machine - Google Patents

Abstract

PURPOSE: A direct-coupled washing machine is provided to reduce the manufacturing cost and improve the cleaning efficiency by using an outer-rotor-way induction motor as a motor of a washing machine. CONSTITUTION: A casing(11) has a barrel shape. An outer barrel(13) is supported by a supporting rod(12) in the casing(11) and accommodates wash water. A washing barrel(14) is provided within the outer barrel(13). A pulsator(15) is mounted on a bottom of the washing barrel(14) so as to be rotated. A washing motor(16) is mounted on a lower of the outer barrel(13) to generate a rotary power. A driving axis assembly(17) is coupled to a rotor(16B) of the washing motor(16) to transfer the rotary power to the washing barrel(14) and the pulsator(15). A rotary axis(18) is coupled to an end of the washing barrel(14). A pulsator rotary axis(19) is inserted into the rotary axis(18) to be coupled to the pulsator(15). A rotary axis connecting unit(20) deliveries the rotary power of the washing motor(16) to the rotary axis(18) and the pulsator rotary axis(19). A coupling(31) moves along an axis of the driving axis assembly(17) and is coupled to the rotary axis(18) or the pulsator rotary axis(19). A coupling elevation lever(32) elevates the coupling(31) in length direction. An elevation lever driving unit(33) makes the coupling elevation lever(32) rotated on the centering around an axis(52b) of a lower bearing housing(52).

Description

Direct Drive Washing Machine {DIRECT DRIVE TYPE AUTOMATIC WASHING MACHINE}

The present invention relates to a washing machine, and more particularly, to a direct-type washing machine that can reduce the production cost and increase the washing efficiency while diversifying the washing function.

In general, a washing machine is classified into a clutch connection method and a direct connection method according to a power transmission method. The clutch connection type washing machine transfers the power generated from the washing motor to the pulsator using the clutch, while the direct connection type washing machine directly connects the washing motor and the washing tank to directly rotate the washing tank by the power of the washing motor. That's the way.

The clutch connection type washing machine decelerates the rotational speed of the washing motor with a belt or gear when washing, and drives only the pulsator by the clutch operation. When dehydration, the washing tank is simply driven by a pulley deceleration or clutch operation. Drive at high speed.

Direct connection type washing machine (hereinafter referred to as direct type washing machine) uses a Brush Less DC motor to freely operate the motor, and the washing tank rotates when washing to perform the washing by friction between the cloth and the washing tank. .

1 is a longitudinal sectional view schematically showing an example of a conventional clutch connection type washing machine.

As shown in the drawing, the conventional clutch connection type washing machine includes an outer tub 3 elastically supported by the support rod 2 in the casing 1 and a washing tub 4 provided in the outer tub 3 to store laundry. ), A pulsator 5 rotatably mounted on the bottom surface of the washing tank 4 to generate water flow, a washing motor 6 mounted on the outer bottom surface of the outer tank 3 to generate driving force, and a washing motor. It is composed of a clutch 8 and the like mounted on one side of 6 and connected to the washing motor 6 with a belt 7 to transmit the driving force to the pulsator 5.

The washing motor 6 uses an induction motor having a relatively high torque and low cost.

In the conventional clutch connection type washing machine as described above, when the laundry is driven, the belt 7 transmits the driving force of the washing motor 6 to the clutch so that the pulsator 5 rotates to form a constant stream of water in the washing tank 4. In the meantime, the pulsator 5 and the washing tank 4 were rotated together by the clutch 8 to dehydrate the laundry.

On the other hand, Figure 2 is a longitudinal sectional view schematically showing an example of a conventional direct-type washing machine.

As shown in the drawing, the conventional direct type washing machine includes an outer tub 3 elastically supported by the support rod 2 in the casing 1 and a washing tub 4 provided in the outer tub 3 to store laundry. And an outer side of the outer tub 3 to directly couple a pulsator 5 provided on the bottom surface of the washing tub 4 to form a washing stream, and a motor shaft (unsigned) directly to the center of the bottom surface of the pulsator 5. It consists of a washing motor 9 etc. which are provided in a side center part.

As described above, the washing motor 9 uses a brush less DC (BLDC) motor capable of controlling various rotation speeds.

In the conventional direct-type washing machine as described above, the washing motor 9 directly rotates the washing tank 4 during washing and dehydration operation to wash or dehydrate the laundry while generating strong water current.

However, the conventional clutch connection type washing machine as described above, not only uses an induction motor as the washing motor 6 but also separately installs a transmission member such as a belt 7 between the washing motor 6 and the clutch 8. There was a problem in that the simple function does not implement a variety of washing algorithms in accordance with the load changes of the laundry.

In addition, the conventional direct-type washing machine, the washing motor (9) can control the washing function using a Bieldi motor in a variety of ways, when washing and dehydration, the washing tank (4) rotates together to carry out all the strokes, the lot of laundry In the case of a small amount of laundry, the laundry adheres to the inner circumferential surface of the washing tank 4 by centrifugal force, and the washing tank 4 rotates together to increase the unnecessary load, thereby reducing the washing efficiency. As a separate drive drive (not shown) for controlling the washing motor 4 as a motor has to be provided, there is a problem that the cost increases.

The present invention devised in view of the problems of the conventional clutch connection method or direct connection type washing machine as described above, while providing a direct washing machine that can reduce the production cost and increase the washing efficiency while diversifying the washing function. There is a purpose.

1 is a longitudinal sectional view showing an example of a conventional clutch connection type washing machine.

Figure 2 is a longitudinal sectional view showing an example of a conventional direct connection type washing machine.

Figure 3 is a longitudinal sectional view showing an example of the present invention direct connection type washing machine.

Figure 4 is a longitudinal sectional view showing the main part of the present invention direct connection type washing machine.

Figure 5 and Figure 6 is a longitudinal cross-sectional view showing each operation of the coupling in the present invention direct connection type washing machine.

** Description of symbols for the main parts of the drawing **

11: casing 12: support rod

13: outer tank 14: washing tank

15: pulsator 16: washing motor

16A: Stator assembly 16B: Rotor assembly

17: drive shaft assembly 17B: rotor bushing

17b: first outer tooth 17C: drive shaft

17c: gear 18: washing tank rotating shaft

18A: Expansion part 18b: Second outer tooth part

18c: gear 19: pulsator rotation shaft

20: rotating shaft connecting portion 21: swing gear housing

22: swing gear 31: coupling

31a: Anti-rotation protrusion 31b: Inner tooth

32: coupling lifting lever 33: lifting lever driving unit

33A: Lifting lever drive motor 33B: Connecting member

40: compression return spring 51,52: upper and lower bearing housing

52b: rotating shaft 53: rotating shaft bracket

53a: anti-rotation groove 60: cooling fin

In order to achieve the object of the present invention, in the housing space in the casing to accommodate the wash water therein, the washing tank rotatably accommodated in the inside of the outer tank to accommodate the laundry, and to rotate relative to the washing tank A pulsator accommodated in the washing tank to form washing water, a washing motor mounted on the bottom of the outer tank to generate rotational force, and a first outer tooth portion having one end fixedly coupled to the rotor of the washing motor. The drive shaft assembly for transmitting the rotational force of the motor to the washing tank or pulsator, the washing tank rotating shaft having a second outer tooth and formed into a hollow body, one end of which is fixed to the washing tank and inserted into the washing tank rotating shaft, the one end of which is fixed to the pulsator Connect the pulsator rotating shaft and the drive shaft assembly to the washing tank rotating shaft and the pulsator rotating shaft to A rotary shaft connecting portion which is transmitted to the washing tank rotating shaft and the pulsator rotating shaft and an inner tooth which is engaged with at least one outer tooth of the first outer tooth and the second outer tooth is provided along the axial direction of the washing motor rotating shaft. In a direct type washing machine including a coupling for coupling movably and a coupling lift means for raising and lowering the coupling in an axial direction, the washing motor is formed in an annular shape by winding a stator coil on a laminated core having a plurality of slots. And a stator assembly for fastening and fastening to a fixed structure extending from the bottom of the outer tub, and having a conductor on the outside of the stator assembly to extrapolate with a certain gap to pass through the center of the stator assembly in the center of the rotor housing that accommodates the conductor. It is an induction motor of outer rotor type which consists of rotor assembly combined with drive shaft assembly. It provides a direct connection type washing machine as.

Hereinafter, the washing machine according to the present invention will be described in detail based on the embodiment shown in the accompanying drawings.

Figure 3 is a longitudinal sectional view showing an example of the present invention of the direct connection type washing machine, Figure 4 is a longitudinal sectional view showing the main part of the present invention direct connection type washing machine.

As shown in the drawing, the washing machine according to the present invention includes a casing 11 having a tubular shape, and an outer tub 13 supporting suspension by a support rod 12 in the casing 11 to accommodate washing water therein. And a washing tub 14 rotatably housed in the outer tub 13, a pulsator 15 rotatably mounted to allow relative movement to the bottom surface of the washing tub 14, and an outer tub 13. It is coupled to the washing motor 16, which is mounted on the bottom and generates rotational force, and the rotor 16B of the washing motor 16, and transmits the rotational force of the washing motor 16 to the washing tank 14 or the pulsator 15. Drive shaft assembly 17, washing tub rotating shaft 18 fixedly coupled to washing tub 14, and pulsator rotating shaft 19 inserted into washing tub rotating shaft 18 and fixedly coupled to pulsator 15. ), The drive shaft assembly 17 is connected to the washing tank rotation shaft 18 and the pulsator rotation shaft 19 in a geared manner of the washing motor 16 Rotating shaft connecting portion 20 which transmits electric power to the washing tank rotating shaft 18 and the pulsator rotating shaft 19 and the washing tank rotating shaft 18 or the pulsator rotating shaft while being movable along the axial direction of the drive shaft assembly 17. 19, a coupling elevating lever 32 for elevating the coupling 31 in the axial direction while rotating about a hinge groove (unsigned) provided on one side, and a coupling elevating lever. A lifting lever which is connected to the 32 to raise or lower the coupling lifting lever 32 so that the coupling lifting lever 32 rotates about the pivot shaft 52b of the lower bearing housing 52 which will be described later. The drive unit 33 is included.

The casing 11 is formed in a tubular shape which is opened upwardly to allow the laundry to enter and exit, and the casing 11 is suspended and supported by the supporting rod 12 in the casing 11. The tub 13 is formed in a cylindrical shape inside the outer tub 13 and rotatably provided with a washing tub 14 formed with a plurality of dehydration holes (not shown) on the main wall thereof, and washing water flows on the inner bottom surface of the tub 14. The pulsator 15 to be formed is coupled to the washing tub 14 so as to be capable of relative rotation.

An upper bearing housing 51 having an almost disk shape is coupled to the bottom of the outer tub 13, and a lower bearing housing 52 is fixedly coupled to the bottom of the upper bearing housing 51. At the center of the upper bearing housing 51 and the lower bearing housing 52, the upper bearing 51a and the lower bearing 52a are coupled to each other so as to support rotation of the washing tub rotating shaft 18.

The washing motor 16 is formed in an annular shape and is stator assembly 16A fixedly coupled to the rotation shaft bearing bracket 53 to be described later, and the rotor assembly 16B which is extrapolated and rotated with a predetermined gap outside the stator assembly 16A. )

The stator assembly 16A is formed by stacking a plurality of thin cores, forming a plurality of slots radially in the outer circumferential surface thereof, and winding a predetermined amount of stator coils C in each slot. In addition, the inner periphery of the rotation shaft bearing bracket 53 is fixed by bolts.

The rotor assembly 16B has a certain area to accommodate the stator assembly 16A, and a rotor housing 16a that is bent at a predetermined height to form a magnet support (unsigned), and a rotor housing ( It consists of a permanent magnet (16b) evenly mounted on the inner peripheral surface of the magnet support portion of 16a. In addition, in the center of the rotor housing 16a, the rotor bushing for coupling the drive shaft 17C of the drive shaft assembly 17 passing through the center of the laminated core of the stator assembly 16A and the rotor housing 16a Tighten and fix 17B).

In addition, the upper end of the rotor housing (16a) is preferably provided with a plurality of cooling fins 60 for cooling the rotor assembly (16B).

In addition, the washing motor 16 is disposed in parallel to the first condenser (not shown) and the first condenser (not shown) to be driven in the pulsating washing or dehydration mode, and in particular, the washing tub ( And a second condenser that is driven together with the first condenser in the case of a rotary washing mode requiring a large amount of torque. On the line of the second capacitor, a switching unit for shorting the second capacitor in accordance with the operation mode is provided.

The drive shaft assembly 17 is a rotor bushing fixedly coupled to the center of the rotor housing 16a fixedly coupled to the rotor 16B of the washing motor 16 and forming a first outer tooth 17b on its outer circumferential surface. (17B) and a drive shaft (17C) for coupling one end to the rotor bushing (17B) and forming a gear portion (17c) to engage with the swing gear (22) of the rotary shaft connecting portion (20), which will be described later on the other end. .

The washing tub rotating shaft 18 is formed of a hollow member to accommodate the pulsator rotating shaft 19 therein and is fixedly coupled to the bottom of the washing tub 14, and has a predetermined length in a axial direction and a predetermined height in the circumferential direction of the lower end thereof. A second outer tooth portion 18b having a protrusion protrudes in the same size and shape as the first outer tooth portion 17b described above.

In addition, the washing tub rotating shaft 18 forms an expansion portion 18A so as to accommodate the rotating shaft connecting portion 20 in the middle portion thereof, and the pivoting gear of the rotating shaft connecting portion 20 is formed on the inner circumferential surface of the expanding portion 18A. 22) The gear part 18c is formed so that it may engage with an outer side.

Further, the washing tub rotating shaft 18 is accommodated and coupled to the upper and lower portions so that the drive shaft 17C and the pulsator rotating shaft 19 can rotate relative to each other via a pair of oilless bearings (unsigned) therein.

The pulsator rotating shaft 19 is formed longer than the washing tank rotating shaft 18, the upper end is fixedly coupled to the pulsator 15 while the lower end is forcibly fixed to the swing gear housing 21 of the rotating shaft connecting portion 20.

The rotary shaft connecting portion 20 is rotatably coupled to one side of the swing gear housing 21 and the swing gear housing 21 in which the center portion is mounted on the upper end of the drive shaft 17C so as to allow relative movement. While the gear portion 17c of 17C is engaged, the outer circumferential surface is composed of a turning gear 22 that is engaged with the gear portion 18c of the washing tub rotating shaft 18.

The coupling 31 rotates to prevent rotation of the washing tub rotating shaft 18 by being engaged with the rotation preventing groove 53a of the rotating shaft bearing bracket 53 which is fixedly coupled to the outer tub 13 together with the lower bearing housing 52 when raised. A plurality of prevention protrusions 31a are formed on the upper surface, and the inner peripheral surface 31b is formed on the inner circumferential surface thereof so as to be engaged with the first outer teeth 17b and the second outer teeth 18b together or to engage with each other. Form.

In addition, the rotation shaft bearing bracket 53 is formed of an insulator so that current applied to the stator 16A of the washing motor 16 is not transmitted to the neighboring member, and is fastened and fixed to the stator assembly 16A by bolts as described above. It is preferable.

In addition, between the upper surface of the coupling 31 and the lower surface of the rotation bearing shaft bracket 53 or the lower surface of the lower bearing housing 52 corresponding to the compression type return spring to return to the original position when the coupling 31 is lowered ( It is preferable to interpose 40).

The coupling elevating lever 32 has an annular shape extended to accommodate the coupling 31, and is disposed such that the upper surface thereof contacts the coupling 31. In addition, one side of the lower bearing housing 52, which will be described later, may be inserted into a hinge groove (unsigned) provided at one end of the coupling elevating lever 32 so that the coupling elevating lever 32 may rotate in the vertical direction. The rotating shaft 52b is formed so that it may become.

The lifting lever driving part 33 is fixedly coupled to the bottom of the outer tub 13 to the lifting lever driving motor 33A in which the rotating shaft is eccentrically rotated, and the driving pulley (unsigned) coupled to the rotating shaft of the lifting lever driving motor 33A. One end is wound and the other end is made of a connecting member 33B coupled to the opposite side of the rotation groove of the coupling lifting lever 32 by a wire or the like.

The present invention direct type washing machine as described above operates as follows.

That is, when water is supplied to the inside of the washing tank 15, the lifting lever driving motor 33A is turned off, and the coupling lifting lever is caused by the self-weight of the coupling 31 and the restoring force of the return spring 40. 32 rotates in the clockwise direction of the drawing, whereby the coupling 31 is lowered so that the inner tooth portion 31b of the coupling 31 is the first outer tooth portion 17b and the second outer tooth portion. Water supply is carried out with the (18b) meshed.

Next, when the degree of contamination of the laundry is severe or the quantity is small, pulsating washing is performed. In this case, the draining motor (not shown) is kept off while the lifting lever driving motor 33A is on. The coupling elevating lever 32 is pulled by the elevating lever driving motor 33A and rotated about the rotation shaft 52b to lift the coupling 31, which causes the coupling 31 to move to the first outer side. The high-speed rotational force of the rotor assembly 16B is transmitted only to the pulsator rotating shaft 19 while being spaced apart from the teeth 17b so that the pulsator 15 rotates at a high speed in the washing tank 14 to form strong water flow. Wash it. At this time, as the driving shaft 17C for transmitting the rotational force is also connected to the washing tub rotating shaft 18 by the turning gear 22, the rotational force of the rotor assembly 16B may be transmitted to the washing tub rotating shaft 18 to rotate together. The inner tooth portion 31b of the coupling 31 is engaged with the second outer tooth portion 18b of the washing tank rotating shaft 18, and the anti-rotation protrusion 31a of the washing tank rotating shaft 18 is the rotating shaft receiving bracket 53. Engaged in the anti-rotation groove (53a) of the eventually stop the rotation of the washing tank rotating shaft (18).

Next, when the degree of contamination of the laundry is low or the quantity is large, or when the laundry is relatively weak in textile material, or when the laundry is to be washed with pore to remove the kink of the cloth, washing is performed. In this case, the drain motor (not shown) is switched to the first stage (ON) state and the lifting lever driving motor 33A is turned off so that the drain valve (not shown) remains closed and only the brake assembly (not shown) is released. In addition, the coupling 31 is lowered again so that the inner tooth portion 31b of the coupling 31 meshes the first outer tooth portion 17b and the second outer tooth portion 18b together as described above. By transmitting the rotational force of the electronic assembly 16B to the washing tank rotating shaft 18, the washing tank rotating shaft 18 and the pulsator rotating shaft 19 rotate together, thereby rotating the washing tank 14 and the pulsator 15 together.

Next, in the case of performing dehydration, the drain valve (not shown) is opened while the brake assembly (not shown) is released by applying a two-stage power source to the drain motor (not shown). At this time, the lifting lever driving motor 33A remains in the off state, but the power to the washing motor 16 is turned off, and the coupling 31 stops while engaging the drive shaft 17C and the washing tank rotating shaft 18. Accordingly, the washing water filled in the outer tub 13 is discharged to the outside, and when discharge is completed, power is applied to the washing motor 16 so that the washing tank 14 and the pulsator 15 rotate together to dehydrate the laundry.

In this way, it is possible to improve the shortcomings of the induction motor with small torque during initial operation by using the induction motor, which is relatively inexpensive, because it does not require a separate drive drive and drives the washing tank or pulsator directly to the rotor of the washing motor. In addition, the washing effect of the laundry can be enhanced by carrying out various washing operations using a coupling.

In addition, by configuring the washing motor in the outer rotor method, the coupling acting as a clutch and the coupling lifting means for lifting the coupling can be arranged inside the washing motor, thereby reducing the height of the washing machine. In addition, vibration and noise of the washing machine can be reduced by reducing the occurrence of eccentricity.

In addition, since the washing motor is configured in the outer rotor manner, the inlet of the outer tub can be fixed to the user by a certain degree so that the user can conveniently store and take out the laundry.

As described above, the direct-type washing machine according to the present invention includes a stator assembly which is formed in an annular shape by winding a stator coil on a laminated core having a plurality of slots and fastened to a fixed structure extending from the bottom of the outer tub, The outer rotor type induction motor is made of a rotor assembly that has a conductor on the outside of the stator assembly, extrapolates with a certain gap, and combines the drive shaft assembly to pass through the center of the stator assembly in the center of the rotor housing that accommodates the conductor. By doing so, there is no need for a separate drive drive, and thus, various washing strokes can be performed by improving the disadvantage of an induction motor having a relatively low price and a small torque during initial driving.

In addition, as the washing motor is configured by the outer rotor method, the coupling and the coupling lifting means for lifting the coupling can be arranged inside the washing motor, thereby reducing the height of the washing machine and also vibrating the washing machine. Can lower the noise.

In addition, since the washing motor is configured in the outer rotor manner, the inlet of the outer tub can be fixed to the user by a certain degree so that the user can conveniently store and take out the laundry.

Claims (5)

An outer tub provided in the accommodating space in the casing to accommodate the wash water therein, a washing tank rotatably received in the outer tank to store the laundry, and accommodated in the washing tank so as to be able to rotate relative to the washing tank. A pulsator forming a spool, a washing motor mounted on the bottom of the outer tub and generating a rotational force, and having a first outer tooth portion and having one end fixedly coupled to the rotor of the washing motor, thereby rotating the washing force of the washing motor to the washing tub or pulsator. A drive shaft assembly to be transmitted, a washing tank rotating shaft having a second outer tooth portion formed in a hollow body and fixedly coupled to a washing tank, a pulsator rotating shaft inserted into the washing tank rotating shaft and fixed at one end thereof to a pulsator, and a drive shaft assembly. Is connected to the washing tank rotating shaft and the pulsator rotating shaft, and the rotational force of the washing motor is Couple coupled to the axial movement of the washing motor rotation axis having a rotating shaft connecting portion for transmitting to the shaft and the inner teeth engaging with at least one of the outer tooth portion of the first outer tooth portion and the second outer tooth portion. In a direct type washing machine comprising a ring and coupling elevating means for elevating the coupling in an axial direction, The washing motor has a stator assembly formed in an annular shape by winding a stator coil in a laminated core having a plurality of slots and fastened to a fixed structure extending from the bottom of the outer tub, and having a conductor on the outer side of the stator assembly. And an outer rotor type induction motor comprising a rotor assembly coupled to a drive shaft assembly so as to pass through the center of the stator assembly in the center of the rotor housing accommodating the conductor. The method of claim 1, A direct type washing machine, characterized in that the coupling and coupling elevating means is installed in the center of the stator assembly. The method of claim 1, The top of the rotor housing is a direct type washing machine comprising a cooling fin for cooling the rotor assembly. The method of claim 1, And an insulating member coupled to the inner circumferential surface of the laminated core of the stator assembly to prevent the current of the stator assembly from being transmitted to the coupling or coupling lift means. The method of claim 1, The washing motor includes a first condenser to be driven in the pulsating washing or dehydration mode, and a second condenser to be operated together with the first condenser in parallel washing mode in which a relatively large torque is required in parallel with the first condenser. Direct type washing machine including.