KR100777273B1 - full automation type washing machine - Google Patents

Abstract

The present invention relates to a fully automatic washing machine in which the rotating power can be stably controlled in a short time when the rotating power is transmitted to the pulsator or the dehydration tank by a drive unit comprising a stator and a rotor.

To this end, the present invention provides a dehydration tank (2) rotatably installed in the outer tank (1), a pulsator (3) installed in the dehydration tank (2) and rotatable independently of the dehydration tank (2), shaft support A dehydration shaft 5 which is rotatably supported by the bearing case 20 and transmits rotational power to the dehydration tank 2, a washing shaft 6 which transmits rotational power to the pulsator 3, and a stator 7a. The clutch 7 which can switch the power transmission path of the motor 7 to the washing shaft 6 or the dewatering shaft 5 in response to the motor 7 in which the rotor 7b rotates and the washing stroke or the dehydrating stroke as the electric current is energized A fully automatic washing machine is provided, including a mechanism.

Fully automatic washing machine, clutch, BLDC motor

Description

Fully automatic type washing machine

1 is a longitudinal sectional view showing main parts of a clutch mechanism according to the present invention;

2 is a schematic overview of the full automatic washing machine according to the present invention

3a to 3c is a longitudinal cross-sectional view showing the operation of the present invention,

3A is a state diagram at the time of washing

3B is a state diagram at the time of dehydration

3C is a state diagram at the time of instant restraint

Fig. 4A is a partially expanded view of the movable gear of the slider and the fixed gear of the stationary body.

4B is a state diagram at the time of dehydration

4C is a state diagram at the time of instant restraint

Explanation of symbols on the main parts of the drawings

1: Outer tank 2: Dewatering tank

3: pulsator 4: washing shaft

5: Dehydration 6: Clutch Motor

7a: stator 7b: rotor

7: motor 8: lever                 

800: groove 801: slope

802: Flat surface 9: Operator

900: Information Home 12: Torsion Spring

14: Return spring 15: Slider

150: serration 151: movable gear

152: Jaw portion 16: Connector assembly

16a: outer connector 16b: inner connector

160: serration of the inner peripheral surface of the inner connector

161: serration of the inner peripheral surface of the inner connector

17: Connecting rod 20: Shaft support bearing case

21: fixing pin 210: stopper

22: fixed body 220: support bracket

221: fixed gear 23: upper bearing

24: lower bearing 30: lever guide

40: compression spring

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully automatic washing machine, and more particularly, to a clutch device of a fully automatic washing machine, in which washing and rinsing are performed by a pulsator rotating at a low speed, and dewatering is performed by a dehydration tank rotating at a high speed.

In general, a washing machine is a product that removes various contaminants attached to clothes, bedding, etc. by using the emulsification of the detergent and the friction action of the water flow due to the rotation of the washing blade, and the impact of the pulsator on the laundry. By detecting the amount and type of laundry, the washing method is automatically set, and the water level of the washing water is supplied to the appropriate level according to the amount and type of the laundry, and then washing is performed under the control of the microcomputer.

In addition, the driving method of the conventional fully automatic washing machine is a method of rotating the dehydration tank by transmitting the rotational power of the drive motor to the washing shaft through the power transmission belt and pulley to rotate the pulsator or to the dehydration shaft, There is a method of rotating the dehydration tank at different speeds during washing and dehydration by the speed control of the BLDC motor.

On the other hand, in recent years, while using a BLDC motor, the power transmission path is controlled differently, and when washing, the pulsator rotates at low speed to wash, and when dewatering, a pulsator and a dewatering tank are rotated at a high speed to dehydrate. A structural example of this type is described in Japanese Patent Laid-Open No. 11-347289.

However, in the method described in Japanese Patent Laid-Open No. 11-347289, the operation is unstable because the operation of the engagement clutch mechanism is performed by the solenoid, and there is a problem such that a lot of noise occurs when the driving body is engaged.

The present invention has been made to solve the above-mentioned problems, and when the rotational power is transmitted to the pulsator or the dehydration tank by the drive unit made of the stator 7a and the rotor, the rotational power can be stably controlled in a short time. The purpose is to provide a fully automatic washing machine.

In order to achieve the above object, the present invention is a dewatering tank rotatably installed in the outer tank, a pulsator installed in the dewatering tank and rotatable independently of the dewatering tank, and rotatably supported in the shaft support bearing case to rotate in the dewatering tank Dehydration shaft that transmits power, Washing shaft that transmits rotational power to the pulsator, Motor rotating the rotor as the stator is energized, and the power transmission path of the motor in response to the washing stroke or dehydration stroke A fully automatic washing machine is provided, including a clutch mechanism switchable with shrinkage.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4C.

1 is a longitudinal cross-sectional view showing a main portion of the clutch mechanism according to the present invention, Figure 2 is a schematic diagram of the overall automatic washing machine according to the present invention, the automatic washing machine of the present invention is rotatably installed in the outer tub (1) of the main body The dehydration tank 2, a pulsator 3 installed in the dehydration tank 2 and rotatable independently of the dehydration tank 2, and rotatably supported by the axial support bearing case 20, are dewatering tank 2. Dehydration shaft (5) for transmitting rotational power to the rotor, washing shaft (6) for transmitting rotational power to the pulsator (3), and the motor (7) in which the rotor (7b) rotates as the stator (7a) is energized. And a clutch mechanism capable of switching the power transmission path of the motor 7 to the washing shaft 6 or the dewatering shaft 5 in response to the washing stroke or the dehydrating stroke.

On the other hand, the clutch mechanism, the clutch motor (6) installed in the lower portion of the outer tub (1), the lever guide 30 fixed on the shaft support bearing case 20, and the on / off of the clutch motor (6) A lever (8) having a groove (800) having an inclined surface (801) and a flat surface (802) extending horizontally from the lower end of the inclined surface (801) by a guide of the lever guide (30) when off; A connecting rod 17 which pulls the lever 8 on the clutch motor 6 toward the clutch motor side, and one end is fixed to the front end of the lever guide 30, and a fixing protrusion on one side of the lever 8. Is fixed to the groove 800 having a return spring 14 for securing the return force to the lever 8 and an inclined surface 801 of the lever 8 when the clutch motor 6 is turned off. The movable member 9 and the shaft support bearing case 20 which are positioned on the lower portion of the flat surface 802 by descending on the inclined surface 801 when turned on. The fixed body 22 is fixed to the lower portion and provided with a fixed gear 221 formed along the circumferential direction, and is fixed on the support bracket 220 of the fixed body 22, the movable rod during the lifting of the plunger 10 ( 12 and a slider for switching the rotational power transmission path of the motor 7 while raising and lowering along the dehydration axis 5 direction in accordance with the rotation direction of the movable rod 12 and the fixed pin 21 serving as the center of rotation of the rotation ( 15 is installed on the slider and the outer circumferential surface of the fixing pin 21 fixed on the support bracket 220 of the fixing body 22, one end of which is fixed to the lower end of the mover 9 and the other end of the slider 15 It is configured to include a torsion spring 12 is installed to support a) and the connector assembly 16 is interposed so that the rotational force of the rotor (7b) is transmitted to the washing shaft (6).

At this time, the upper end of the slider 15 is provided with a movable tooth 151 that can be fitted to the fixed tooth 221 of the fixed body 22, the serration of the dehydration shaft 5 and the connector assembly 16 on the inner peripheral surface Serration 150 is provided to engage the serration 160 on the outer circumferential surface of the upper end of the inner connector (16b) constituting the ().

In addition, the connector assembly 16 is integrally injection molded into the outer connector 16a, which is a resin material that is bolted to the rotor 7b, and the outer connector 16a, and the lower end of the washing shaft 6 on the inner circumferential surface thereof. The inner connector is formed of a metal material having a serration 161 that is engaged with the serration of the serration and a serration 160 for coupling with the slider 15 on the outer circumferential surface of the upper end exposed to the outer connector 16a. 16b).

At this time, the inner connector 16b is made of an aluminum alloy sintered body to improve strength.

On the other hand, between the upper surface and the lower bearing 24 of the slider 15 is provided with a compression spring 40 for pushing the slider 15 downward when the clutch motor 6 is off.

In addition, a stopper 210 is formed on the support bracket 220 of the fixing body 22 to which the fixing pin 21 is coupled to limit the rotational angle of the torsion spring 12 to limit the lowering position of the slider 15. do.

Reference numeral 23 is an upper side shaft support bearing.

The operation of the clutch mechanism of the present invention configured as described above is as follows.

The clutch mechanism according to the present invention is in an off state in which power is not applied to the clutch motor 6 before washing starts, thereby maintaining a state as shown in FIGS. 1 and 3B.

That is, at this time, the mover 9 is located in the groove 800 having the inclined surface 801 of the lever 8, the slider 15 is located at the bottom dead center.

In this state, when power is applied to the clutch motor 6 and the clutch motor 6 is turned on, the connecting rod 17 moves to the clutch motor side by the driving force of the clutch motor 6. Accordingly, the lever 8 is pulled toward the clutch motor 6 while being guided by the lever guide 30.

At this time, the return spring 14 installed at the rear end of the lever guide 30 is tensioned.

On the other hand, as the lever 8 is pulled toward the clutch motor 6 side, the mover 9 which contacts the inclined surface 801 of the lever 8 is pushed down by the inclined surface 801, and the lever 8 At the time when the movement of) is completed, the mover 9 is positioned below the flat surface 802 of the lever 8 as shown in FIG. 3A.

As such, when the movable member 9 descends due to the movement of the lever 8, the torsion spring 12 having one end fixed to the lower end of the movable member 9 is fixed to the lower portion of the shaft support bearing case 20. It rotates counterclockwise on the drawing about the fixing pin 21 installed through the support bracket 220 of the stagnation 22.

In this way, when the torsion spring 12 rotates counterclockwise in the drawing about the fixing pin 21, the other end of the torsion spring 12 which is supporting the jaw portion 152 of the slider 15 is the slider ( By pushing the jaw portion 152 of 15), the slider 15 is pushed up along the dehydration shaft 5 in the axial direction.

Accordingly, the movable gear 151 formed at the upper end of the slider 15 is combined with the fixed gear 221 provided in the fixed body 22 fixed on the lower surface of the shaft support bearing case 20. See FIG. 4A)

In this manner, in the state where the movable gear 151 of the slider 15 is engaged with the fixed gear 221 of the fixed body 22, the slide is out of the connector assembly 16, so that the washing shaft when the rotor 7b is rotated ( 6) Only turns.

That is, during washing, the slider 15 is in a state in which the serration 150 formed on the inner circumferential surface is engaged only with the serration of the outer circumferential surface of the dehydration shaft 5, and the serration of the upper end of the inner connector 16b engaged with the washing shaft 6. Since it is not engaged with the 160, the rotational power of the rotor 7b is transmitted only to the pulsator 3 through the washing shaft 6.

Hereinafter, the operation of the clutch mechanism during dehydration will be described.

While the washing is in progress as shown in FIG. 3A, the power applied to the clutch motor 6 is turned off during the dehydration process after the washing is completed.

As such, when the clutch motor 6 is off, the lever 8 is moved away from the clutch motor 6 by the restoring force of the return spring 14.

Accordingly, at the time when the return of the lever 8 is completed, the movable member 9 which is in contact with the flat surface 802 of the lever 8 at the time of washing again has a groove (with the inclined surface 801 of the lever 8 provided) 800).

As such, when the movable member 9 rises due to the movement of the lever 8, the compressive force applied to rotate the torsion spring 12 counterclockwise is alleviated, and the torsion spring 12 is axially supported. It rotates in a clockwise direction with respect to the fixing pin 21 installed through the support bracket 220 of the fixing body 22 fixed to the lower part of the case 20.

Then, as the torsion spring 12 rotates clockwise in the drawing about the fixing pin 21, the tip of the torsion spring 12 moves the slider 15 along the dehydration shaft 5 in the axial direction. The boosting force is removed.

As the bearing force of the torsion spring 12 with respect to the slider 15 is removed as described above, the slider 15 is lowered by the self-weight and the pushing force of the reinforcing spring, and thus, the movable gear of the slider 15 is reduced. The fixed gear 221 of the 151 and the fixed body 22 is separated (see FIG. 4B).

When the slider 15 is completely lowered, the serration 150 of the inner circumferential surface of the slider 15 is the serration 160 and the dehydration shaft 5 on the outer circumferential surface of the upper end of the inner connector 16b coupled to the washing shaft 6. ) Is engaged with the serration of the lower end at the same time, so that the high-speed rotation of the washing shaft 6 and the dewatering shaft 5 during the high-speed rotation of the rotor (7b) is dehydrated.

On the other hand, when entering into the washing state in the clutch motor 6 off state, the position of the movable gear 151 of the slider 15 relative to the fixed gear 221 of the fixed body 22 does not match the position of Figs. 3C and 4C As shown in FIG. 1, a state of instantaneous restraint of the slider 15 may occur.

That is, since the fixed body 22 is fixed on the axial support bearing case 20, the position of the fixed tooth 221 is constant, but the slider 15 is rotatable together with the dehydration shaft 5, so that the movable tooth at the stop The position of 151 is variable.

Accordingly, when switching to the washing state, the peak portion of the movable tooth 151 of the slider 15 and the peak portion of the fixed tooth 221 of the fixed body 22 may come into contact with each other. Is referred to as the instantaneous restraint state for the slider 15.

At this time, since the slider 15 is slightly engaged with the serration 160 on the outer circumferential surface of the upper end of the inner connector 16b, the slider 15 is rotated, and the movable gear 151 of the slider 15 is rotated as the peaks and valleys of each gear meet. ) And the fixed gear 221 of the fixing body 22 is one end of the torsion spring 12 is coupled to the mover 9 of the clutch mechanism of the present invention and coupled to the outer peripheral surface of the fixing pin 21 on the support bracket 220. It is naturally engaged by the pushing force due to the elastic restoring force, and the momentary restraint state for the slider 15 is released.

On the other hand, instead of the serration is formed in the lower end of the washing shaft (4), the lower end of the washing shaft is in the shape of a square shaft, the inner connector (16b) to form a hollow square ring shape to match the hollow shaft in the shaft It may be combined.

According to the present invention, when the rotational power is transmitted to the pulsator or the dehydration tank by the drive unit of the stator and the rotor, the rotational power transmitted to the washing shaft or the dehydration shaft can be reliably and reliably switched in a short time.

Claims (8)

Dewatering tank rotatably installed in the outer tank, A pulsator installed in the dehydration tank and rotatable independently of the dehydration tank; A dehydration shaft which is rotatably supported by the shaft support bearing case and transmits rotational power to the dehydration tank; A washing shaft for transmitting rotational power to the pulsator; A motor in which the rotor rotates as the stator is energized, A clutch mechanism capable of switching the power transmission path of the motor to the washing shaft or the dewatering shaft in response to the washing stroke or the dehydrating stroke; The clutch mechanism, Clutch motor; A lever linearly driven by the clutch motor; A mover that moves up and down in association with the linear movement of the lever; A torsion spring connected to one end of the mover to be selectively rotatable by vertical movement of the mover; And a slider for switching the rotational power transmission path of the motor while moving up and down along the dehydration shaft by the rotation of the torsion spring. The method of claim 1, The clutch mechanism, A lever guide fixed to the shaft support bearing case to guide linear movement of the lever; A connecting rod which pulls the lever in the motor direction when the clutch motor is on; A return spring having one end fixed to the front end of the lever guide and the other end fixed to the fixing protrusion at one side of the lever to give a return force to the lever; A fixed body fixed to a lower portion of the axial support bearing case and having a fixed tooth formed along a circumferential direction; A fixing pin fixed on a support bracket of the fixture to serve as a rotation center of the torsion spring; And a connector assembly interposed so that the rotational force of the rotor is transmitted to the washing shaft. The method of claim 2, The upper end of the slider is provided with a movable gear that can be fitted to the fixed gear of the fixture, the inner circumference is provided with a serration for engaging the serrations on the outer circumferential surface of the contraction or connector assembly on the inner peripheral surface. The method of claim 2, The connector assembly is an outer connector that is a resin material that is bolted to the rotor, and a serration for coupling with a slider on an outer circumferential surface of the upper part exposed to the outside of the outer connector by being injection molded into the outer connector, coupled to a lower end of a washing shaft. Fully automatic washing machine, characterized in that consisting of the inner connector is formed of a metal material. The method of claim 4, wherein The inner connector is a full automatic washing machine, characterized in that the aluminum alloy sintered body. The method of claim 2, And a compression spring for pushing the slider downward when the clutch motor is turned off between the upper surface and the lower bearing of the slider. The method of claim 2, Fully automatic washing machine, characterized in that the stopper is formed on the support bracket of the fixed body to which the fixing pin is coupled to limit the rotation angle of the torsion spring to define the lowering position of the slider. The method of claim 2, The lever consists of a groove having an inclined surface and a flat surface extending horizontally from the lower end of the inclined surface to linear movement by the guidance of the lever guide when the on / off of the clutch motor, And the mover is in contact with a groove having an inclined surface of the lever when the clutch motor is turned off, and descends on the inclined surface when on, and is positioned below the flat surface.

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