KR20030077845A - full automation type washing machine - Google Patents

Abstract

PURPOSE: A full automatic washing machine is provided to transmit power to a pulsator or a dehydrating tub stably for a short time by restricting collision noise in switching a coupling with mounting the elastic member in the contact portion of the coupling. CONSTITUTION: A washing machine includes a dehydrating tub, a pulsator rotating independently of the dehydrating tub, a dehydrating tub transmitting power to the dehydrating tub, a washing shaft transmitting power to the pulsator, a BLDC(brushless direct current) motor, and a clutch unit switching the power train passage of the BLDC motor into the washing shaft or the dehydrating shaft. A rubber ring(18) is formed on an outer connector of a connector assembly. The rubber ring comprises an elastic rib(180) having the bore smaller than the full diameter of an inner connector, an annular recess formed to deform the elastic rib radially, and a recess(182) formed in the portion contacted to the lower part of a coupling to prevent the rubber ring from being contacted to the coupling and moved up and apply the cushion.

Description

Fully automatic type washing machine

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully automatic washing machine, and more particularly, to a fully automatic washing machine having a novel power transmission mechanism for performing washing and rinsing by a pulsator rotating at a low speed, and performing dehydration 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 pulsator or the dehydration tank by transmitting the rotational power of the drive motor to the washing shaft through the power transmission belt and pulley, or to the dehydration shaft, and BLDC motor ( There is a method of rotating the washing tank and dehydration tank at different speeds when washing and dehydrating by speed control of Brushless DC 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 is rotated at low speed to wash, and when dewatering, a pulsator and a dewatering tank are rotated at the same time to spin and dewater. A structural example of this type is described in Japanese Patent Laid-Open No. 11-347289.

However, the method described in Japanese Patent Laid-Open No. 11-347289 has problems such as unstable operation because of the operation of the engagement clutch mechanism by the solenoid, and a lot of noise during engagement of the driving body.

SUMMARY OF THE INVENTION 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 of the stator and the rotor, the rotational power can be switched and controlled in a short time stably without noise. It is an object of the present invention to provide a clutch mechanism of a fully automatic washing machine and a control method thereof.

1 is a schematic diagram of a fully automatic washing machine to which the clutch mechanism of the present invention is applied;

2A and 2B are principal part longitudinal sectional views which show the action | action of the clutch mechanism of this invention,

2A is a state diagram at the time of washing

Figure 2b is a state diagram at the time of dehydration

3A and 3B are enlarged views of main parts of FIGS. 2A and 2B;

3A is a state diagram at the time of washing

3B is a state diagram at the time of dehydration

4A is a bottom view along the line II of FIG. 2A

FIG. 4B is a bottom view along the line II-II of FIG. 2B

Figure 5 is an enlarged view showing the laundry shaft and deshrinkable structure of Figure 2a

6 is an enlarged view of a portion A of FIG. 2A;

7 is a cross-sectional view showing the main assembly state of the present invention, a state diagram before assembly of the power transmission elements for transmitting the power of the clutch motor to the coupling;

8 is a perspective view showing a state after assembly of FIG.

9 is a bottom perspective view of the coupling;

10 is a perspective view showing a rubber ring

11 is a cross-sectional view of FIG.

12 is a perspective view of a clutch motor

13 is an exploded perspective view of FIG. 12;

14A to 14C are schematic views for explaining an operation relationship between a cam and a switch when the clutch motor is driven according to the present invention.

14A is a cam and switch state diagram at a washing mode maintenance point

14B is a cam and switch state diagram immediately before switching to the dehydration mode.

14C is a cam and switch state diagram at an initial point

15 is a time chart showing an operation relationship between a clutch motor, a cam, and a switch of the present invention;

Explanation of symbols on the main parts of the drawings

1: Outer tank 2: Dewatering tank

3: pulsator 4: washing shaft

5: Dehydration 5a: Upper Shaft

5b: Lower shaft 6: clutch motor

600: cam 600a: cam home

601: rod connecting shaft 602: driving shaft

650: switch 650a: protrusion

7: BLDC motor 7a: stator

7b: Rotor 8: Lever

800: groove 801: inclined surface

802: flat surface 803: locking projection

805: Stopper 9: Operator

900: Information Home 901: Information Service

902: guide rib 10: plunger

100: stripping prevention piece 11: shock spring

12: movable rod 12a: connection portion

12b: retaining pin 13: tension spring

14: return spring 15: coupling

150a, 150b: Serration 151: Gear

152: flange 154: protrusion

16: Connector assembly 16a: Outer connector

162a: Seating groove 16b: Inner connector

160b: serration on the inner circumference of the inner connector

161b: Serration of the outer circumferential surface of the inner connector

17: Connecting rod 18: Rubber ring

180: elastic ribs 181: deformed free groove-groove

182: close contact groove- recessed groove 183: extruded rib

20: Shaft support bearing case 22: Coupling stopper

220: support bracket 221: gear tooth

23: Upper shaft support bearing 24: Lower shaft support bearing

30: Lever Guide 30a: Information Center

30a-1: Guiding groove 40: Compression spring

51: ball bearing 52: C-ring

53: sealing member 530: lips

54: sealing member 540a, 540b: lips

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 A dehydration shaft that transmits power, a washing shaft that transmits rotational power to the pulsator, a BLDC motor in which the rotor rotates as it is energized by the stator, and a deceleration gear installed inside the outer tank to decelerate through the cam As a geared motor that transmits power to a connected drive shaft, the torque required to rotate the drive shaft is greater than the restoring force of the return spring, so that the cam stays in place when the clutch motor is turned off, and is coupled to the drive shaft of the clutch motor. A cam, a lever guide fixed on the shaft support bearing case, and a lever guide when driving the clutch motor. Connecting between a lever having a groove having an inclined surface and a flat surface extending horizontally from the lower end of the inclined surface, and installed between the cam and the lever of the clutch motor to pull the lever on the clutch motor toward the clutch motor. One end is fixed to the rod and the tip of the lever guide, the other end is fixed to the locking projection on one side of the lever, and the return spring provides a return force to the lever, and the upper end is inclined to correspond to the inclined surface of the lever. A hollow cylinder type mover which is brought into contact with a groove having a lower surface and descends on an inclined surface when switching to the washing mode, and a plunger installed to move up and down along the guide groove inside the mover; A buffer spring positioned between the mover and the plunger, and a lower portion of the shaft support bearing case. Fixed to the coupling stopper with gears formed along the circumferential direction, one end of the hinge is coupled to the lower end of the plunger, and one point of the middle portion is hinged to the lower end of the support bracket formed on the coupling stopper, so Coupled fork-shaped movable rod for seesaw movement around one point of the hinge-coupled intermediate part, and a coupler for switching the rotational power transmission path of the BLDC motor while raising and lowering along the de-shrinkage direction according to the rotational direction of the movable rod. An outer connector provided with an annular elastic member seating groove at the center of the upper surface as a resin material fastened by the fastening member to the ring and the rotor, and integrally injection-molded inside the outer connector and having a serration at the lower end of the washing shaft on the inner peripheral surface thereof. Is formed on the outer peripheral surface of the upper end exposed to the outside of the outer connector. The full automatic washing machine is provided, it characterized in that the serration is hayeoseo includes an elastic member installed in the receiving groove of the metal material of the inner connector and the outer connector to be formed for engagement with the.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings, FIGS. 1 to 15.

1 is a schematic view of a fully automatic washing machine to which the clutch mechanism of the present invention is applied, and FIGS. 2A and 2B are main portion longitudinal cross-sectional views illustrating the operation of the clutch mechanism of the present invention, and FIGS. 3A and 3B are enlarged main parts of FIGS. 2A and 2B. 4A is a bottom view along the line II-I of FIG. 2A, and FIG. 4B is a bottom view along the line II-II of FIG. 2B, wherein the fully automatic washing machine of the present invention rotates inside the outer tub 1 of the main body. A dewatering tank (2), which is installed as possible, a pulsator (3) installed in the dewatering tank (2) and rotatably installed independently of the dewatering tank (2), and a shaft support bearing case (20; FIG. 2A). And a dehydration shaft (5) for rotationally supporting the dehydration tank (2), a washing shaft (4) for transmitting rotational power to the pulsator (3), and a stator (7a). As the rotor 7b rotates, the BLDC motor 7 rotates, and the power transmission mirror of the BLDC motor 7 corresponds to the washing or dehydrating stroke. A is configured to include a clutch mechanism capable switching the washing shaft 4 or the de-shrink (5).

In this case, the clutch mechanism includes a clutch motor 6 installed below the outer tub 1, a cam 600 coupled to the drive shaft 602 of the clutch motor 6, and the shaft support bearing case 20. Lever 30 is fixed on the groove, and the groove 800 and the inclined surface 801 having a linear movement and linearly guided by the guide of the lever guide 30 when the clutch motor 6 is driven A lever 8 having a flat surface 802 extending horizontally from the cam, and between the cam 600 and the lever 8 of the clutch motor 6 so as to turn on the lever 8 when the clutch motor 6 is turned on. A connecting rod 17 which pulls toward the clutch motor 6 side, and one end is fixed to the front end of the lever guide 30, and the other end is fixed to the locking projection 803 on one side of the lever 8, the lever 8 The inclined surface 8 in contact with the return spring 14 which imparts a return force to the groove 800 and the groove 800 having the inclined surface 801 of the lever 8 when dewatering, and then switching to the washing mode. Plunger 10 is installed to move up and down along the guide cylinder 900 inside the hollow cylinder-type movable member (9) to be lowered by riding down the flat surface 802 and the movable member (9) ), A cushioning spring 11 positioned between the mover 9 and the plunger 10, and a gear 221 fixed to the lower portion of the axial support bearing case 20 and formed along the circumferential direction is provided. One end of the coupling stopper 22 and the lower end of the plunger 10 is hinged, and one point of the middle portion is hinged to the lower end of the support bracket formed at the bottom of the coupling stopper 22 so that the hinge stops when the plunger is lifted. BLDC motor 7 while elevating along the dehydration shaft 5 direction according to the rotation direction of the fork-shaped movable rod 12 and the movable rod 12 in a fork-shaped movable rod 12 around the middle of one point. Rotation of the coupling 15 and the rotor 7b for switching the rotational power transmission path of the And a connector assembly 16 interposed so that force is transmitted to the laundry shaft 4.

At this time, the clutch motor 6 is a geared motor that transmits power to the drive shaft 602 connected to the cam 600 by decelerating through a reduction gear provided therein.

Meanwhile, 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 4 on the inner circumferential surface thereof. The inner connector 160 is formed to engage with the serration of the metal connector, and the serration 161b for coupling with the coupling 15 is formed on the outer circumferential surface of the upper end exposed to the outer connector 16a. It consists of 16b.

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

In addition, an annular elastic member seating groove 162a is provided at the center of the upper surface of the outer connector 16a, and a rubber ring 18, which is an elastic member, is seated in the seating groove 162a.

On the other hand, Figure 5 is an enlarged view showing the laundry shaft and deshrinkable structure of Figure 2a, the dehydration shaft 5 is different from the existing dehydration shaft, the upper shaft portion (5a) inside the upper end of the lower shaft portion (5b) having a large inner diameter It is press-fitted and coupled, and the upper end of the lower shaft portion 5b supports the upper shaft support bearing 23 supporting the dehydration shaft 5.

In addition, a stage 400 is formed at the lower end of the washing shaft 4, and a corresponding stage is formed on the inner circumferential surface of the inner connector 16b to couple the inner connector 16b to the lower end of the washing shaft 4. The tightening position should be limited when tightening the nut.

In addition, a predetermined gap is provided between the lower end surface of the lower shaft portion 5b of the dehydration shaft 5 and the upper end surface of the inner connector 16b, so as to prevent bending of the shaft during a packaging fall or other impact of the washing machine. The inner connector 16b and the lower end surface of the lower shaft portion 5b of the dehydration shaft 5 are configured to contact first.

At this time, the gap G1 between the inner connector 16b and the dehydration shaft 5 is a gap G2 between the ball bearing 51 and the C-ring 52 that radially support the lower portion of the washing shaft 4. It is formed to be smaller than).

In addition, a sealing member 53 (sealing member) for preventing moisture penetration between the washing shaft 4 and the dehydration shaft 5 is interposed at the upper end of the washing shaft 4, and inside the sealing member 53. At least three or more lips 530 are formed to ensure the reliability of the sealing.

On the other hand, Figure 6 is an enlarged view of the portion A of Figure 2a, a seal for sealing between the dehydration shaft 5 and the shaft support bearing case 20 also on the upper shaft support bearing 23 for supporting the dehydration shaft (5). The member 54 is interposed, and at least four stages of lips 540a are formed at the inside of the sealing member 54 to secure the reliability of the sealing, and at least three stages of lips 540b are formed at the outside.

On the other hand, Figure 7 is a cross-sectional view for explaining the main assembly process of the clutch mechanism of the present invention, Figure 8 is a perspective view showing the post-assembly state of Figure 7, the upper end of the plunger 10 fitted inside the mover (9) On the outer circumferential surface, a mover removal preventing piece 101 for preventing the mover 9 from being separated from the plunger 10 when assembling the plunger 10 and the mover 9 via the buffer spring 11 is provided. It is provided.

That is, on the outer circumferential surface of the upper end portion of the plunger 10 fitted inside the mover 9, a movable release prevention piece 101 protruding in a radial direction is provided, and the shock absorbing spring 11 is provided on the outer circumferential surface of the plunger 10. When the plunger 10 is press-fitted into the mover 9 while the compression spring is fitted, the mover removal preventing piece 101 of the plunger 10 is axially disposed on one side of the outer circumferential surface of the mover 9. Is located in the guide hole 901 is formed, whereby the mover (9) is pushed to the upper by the restoring force of the shock absorbing spring (11) of the movable member 9 at the lower end of the movable member removal prevention piece (101) The lower end of the guide hole 901 prevents the movable member 9 from being removed from the plunger 10.

In addition, a guide rib 902 having a length in the axial direction is formed on the outer circumferential surface of the movable element 9, and the inner side of the guide portion 30a of the lever guide 30 into which the movable element 9 is inserted is formed. Guide ribs 902 are joined to form guide grooves 30a-1 to assist the linear movement of the mover 9.

In addition, the upper end of the movable member 9 is formed to be inclined to correspond to the inclined surface 801 of the lever 8, so that the movable member 9 moves up and down in the vertical direction when the lever 8 is moved horizontally. .

In addition, the return spring 14 is formed in a ring shape so that one end thereof is caught by the locking protrusion 803 of the lever 8, and the other end thereof is hooked to the rear end of the lever guide 30 to fix the position. It is wound to have a larger diameter (D2) than the diameter (D1) of.

In addition, the connecting rod 17 is one end is coupled to the cam 600, the other end is hinged to the lever 8, the lower end of the one end of the lever 8 to which the connecting rod is coupled of the return spring 14 When the restoring force is applied, a stopper 805 is formed which defines the insertion position of the lever 8 into the lever guide 30.

Meanwhile, referring to FIGS. 2A and 2B, between the upper surface of the coupling 15 and the lower bearing 24, a compression spring 40 for pushing the coupling 15 downward when switching to the dehydration mode is performed. ) Is provided.

2A to 3B and FIGS. 7 and 8, projections are formed on the outer side of the coupling stopper 22 to be positioned between the plunger 10 and the support bracket 220 of the coupling stopper 22. 222 is provided, the fork-type movable rod 12 directly below the protrusion 222 is provided with a connecting portion 12a for connecting across both rods, dehydration between the protrusion 222 and the connecting portion 12a When the movable rod 12 is rotated clockwise around the fixing pin 12b is provided with a tension spring 13 for imparting a rotational force.

On the other hand, the front end portion of the movable rod 12 is in a rounded form so as to reduce the frictional force to the front end portion that is in contact with the lower surface of the flange portion 152 of the coupling (15).

9 is a bottom perspective view of the coupling, in which the coupling 15 is provided with a flange portion 152 extending radially at the upper end of the cylindrical body, and the coupling stopper 22 at the upper edge of the flange portion 152. The gear teeth 151 which can be fitted to the gear teeth 221 of the () are formed along the circumferential direction, and the serration on the outer peripheral surface of the upper end of the inner connector 16b constituting the connector assembly 16 and the serration of the dehydration shaft 5 on the inner circumferential surface. Serrations 150a and 150b are provided to engage with 161b.

At this time, the pitch of the serrations 150a and 150b formed on the inner circumferential surface of the coupling 15 is the inner connector when the coupling 15 is completely lowered and engaged with the inner connector 16b. The upper side serration 150a and the lower side serration 150b are formed to have different modules based on the upper position of 16b).

That is, the pitch of the serration formed on the inner circumferential surface of the coupling 15 is formed such that the lower serration 150b has a larger module based on the upper position of the inner connector 16b when it is engaged. .

In particular, the module ratio of the serration 150a formed on the inner circumferential surface of the coupling 15 and the serration 150b formed on the lower portion is preferably 1: 1.5.

On the other hand, the lower end of the serration (150b) located on the lower side of the large pitch of the serration formed on the inner peripheral surface of the coupling 15 is engaged and separated from the serration (161b) of the inner connector (16b) It is rounded to make it easier.

In particular, the lower end of the rounded lower side serration 150b is formed to form an involute profile surface to facilitate clutching with the serration 161b of the inner connector 16b.

In addition, the point where each valley of the lower serration 150a and the lower serration 150b formed on the inner circumference of the body of the coupling 15 meets a sudden cross-sectional change to increase the force to withstand torsional stress. So that the round is processed.

In addition, a plurality of protrusions 154 are formed along the circumferential direction on the bottom surface of the body of the coupling 15.

That is, the protrusion 154 formed along the circumferential direction on the lower surface of the body of the coupling 15 has the coupling 15 and the outer connector 16a when the coupling 15 is lowered by switching to the dehydration mode. It acts to reduce the contact area with the rubber ring 18, which is an elastic member seated in the elastic member seating groove (162a) of.

FIG. 10 is a perspective view showing the shape of a rubber ring, and FIG. 11 is a cross-sectional view of FIG. 10, wherein the rubber ring 18 has an elastic rib having an inner diameter below the inner rim thereof having a dimension slightly smaller than the outer diameter of the inner connector 16b. 180 is formed, and the outer surface of the elastic ribs 180 of the lower surface is formed with an annular groove 181 for giving a deformation margin in the radial direction with respect to the elastic ribs 180, the upper surface A portion of the coupling 15 contacting the bottom surface of the coupling 15 is provided with a groove 182 for preventing a phenomenon that the rubber ring 18 comes close to the lower surface of the coupling 15 and gives a cushion.

At this time, the groove 182 of the upper surface of the coupling 15 is formed by an annular protruding rib 183 spaced apart along the radial direction.

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

The clutch mechanism according to the present invention maintains a state in which the coupling 15 is lowered as shown in FIGS. 2B and 3B as an off state in which power is not applied to the clutch motor 6 before washing is started.

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

When power is applied to the clutch motor 6 in such a state and the clutch motor 6 is turned on, the driving force of the clutch motor 6 is transmitted to the cam 600 through the drive shaft 602. The connecting rod 17 is moved toward the clutch motor 6 by the rotational movement of the cam 600. Accordingly, the lever 8 is guided by the lever guide 30 and the lever 8 is pulled toward the clutch motor 6.

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

On the other hand, when the cam 600 rotates, the mover 9 which contacts the inclined surface 801 of the lever 8 is pushed down by the inclined surface 801, and the cam 600 as shown in FIG. 4A. Is located at the holding point, the mover 9 is positioned below the flat surface 802 of the lever 8 as shown in FIGS. 2A and 3A.

In this way, when the movable member 9 is lowered due to the rotation of the cam 600 to the holding point and the movement of the lever 8 toward the clutch motor, the movable member 9 compresses the shock absorbing spring 11. Accordingly, the plunger 10 installed to move up and down along the guide groove 900 of the mover 9 is also lowered.

Subsequently, the movable rod 12 hinged to the plunger 10 according to the lowering of the plunger 10 is a support bracket 220 of the coupling stopper 22 fixed to the lower portion of the shaft support bearing case 20. It rotates counterclockwise on the drawing about the fixing pin 12b at one point of the middle portion penetrating the center.

When the movable rod 12 rotates counterclockwise in the drawing about the fixing pin 12b, the tip of the movable rod 12 contacts the lower surface of the flange portion 152 of the coupling 15. Thus, the coupling 15 is pushed up along the dehydration shaft 5 in the axial direction.

Accordingly, upon completion of power switching to the washing mode, the gear teeth 151 formed at the upper end of the coupling 15 are fixed on the lower surface of the shaft support bearing case 20 as shown in FIGS. 2A and 3A. The gear provided to the coupled coupling stopper 22 is matched to 221.

In addition, when the gear 151 of the coupling 15 is engaged with the gear 221 of the coupling stopper 22 in this manner, the coupling 15 is out of the connector assembly 16, so that Only the washing shaft 4 is rotated during rotation.

That is, during washing, the coupling 15 is engaged only with the serration of the outer circumferential surface of the dehydration shaft 5, and is not engaged with the serration 161b of the upper end of the inner connector 16b engaged with the washing shaft 4. Therefore, the rotational power of the rotor 7b is transmitted only to the pulsator 3 through the washing shaft 4.

In the state where the gear 151 of the coupling 15 is engaged with the gear 221 of the coupling stopper 22, the rotation of the coupling 15 is caused by the gear 221 of the coupling stopper 22. Is prevented.

As such, when the washing mode is switched to the washing mode, the clutch motor 6 is maintained in the off state, which is due to the configuration and operation of the clutch motor of the present invention. The configuration and operation of the clutch motor of the present invention to be maintained will be described in detail later.

The following describes the operation process of the clutch mechanism at the time of dehydration.

2A and 3A, the washing is in progress, and when the washing is completed and the power transmission path switching to the dehydration mode is required to proceed with the dehydration, power is again applied to the clutch motor 6 to perform the clutch motor. The cam 600 rotates by driving.

As such, when the cam 600 of the clutch motor 6 rotates to move to the dewatering position, the lever 8 is moved away from the clutch motor 6 by the restoring force of the return spring 14.

Accordingly, in the washing mode, the movable member 9 in contact with the flat surface 802 of the lever 8 is inclined surface of the lever 8 when the return of the lever 8 is completed as shown in FIGS. 2B and 3B. 801 is located in the groove 800 is provided.

As such, when the movable member 9 rises due to the movement of the lever 8, the compressive force applied to the shock absorbing spring 11 is alleviated, and thus the movable member 9 can be elevated along the guide groove 900 of the movable member 9. The installed plunger 10 is also raised.

Subsequently, the movable rod 12 hinged to the plunger 10 as the plunger 10 rises is supported by the support bracket 220 of the coupling stopper 22 fixed to the lower portion of the axial support bearing case 20. ) Rotates in a clockwise direction on the drawing (see FIGS. 2A and 3A) centering on the fixing pin 12b installed through.

Then, as the movable rod 12 rotates clockwise in the drawing about the fixing pin 12b, the tip of the movable rod 12 supports the coupling 15 along the dewatering shaft 5. The force pushing up in the axial direction is removed.

As the bearing force of the movable rod 12 with respect to the coupling 15 is removed as described above, the coupling 15 is lowered by the self-weight and the restoring force of the compression spring 40, and thus the coupling 15 The gear teeth 151 of the c) come out of the gear 221 of the coupling stopper 22.

When the coupling 15 is completely lowered, the serrations 150a and 150b of the inner circumferential surface of the coupling 15 are serrations 161b on the outer circumferential surface of the upper end of the inner connector 16b coupled to the washing shaft 4. And it is engaged with the serration of the lower end of the dehydration shaft (5), respectively, so that the high-speed rotation of the washing shaft (4) and the dehydration shaft (5) during the high-speed rotation of the rotor (7b) proceeds to dehydration.

At this time, the serration 150b of the portion of the serration 150a and 150b formed on the inner circumferential surface of the coupling 15 to be engaged with the inner connector 16b has a larger module and has a lower pitch. The lower end of the serration 150b positioned on the side is rounded, so that the inner connector 16b can be easily engaged and separated from the serration 161b.

In particular, the lower end portion of the lower serration 150b rounded with the coupling 15 is formed to form an involute profile surface, so that it is clogged with the serration 161b of the inner connector 16b. Ching and declutching are made easier.

In addition, the points where the valleys of the lower surface of the upper serration 150a formed on the inner circumferential surface of the coupling 15 and the valleys of the lower serration 150b meet each other are rounded to prevent rapid cross-sectional change. The force that the serration of the ring 15 withstands torsional stress is increased.

On the other hand, when the washing coupling 15 enters the washing position by driving the clutch motor 6 in the power switching process to the washing mode, the coupling 15 to the gear 221 of the coupling stopper 22 is engaged. In the case where the gear position of 151 does not match the engagement position of the coupling 15, a state may be instantaneously restrained.

That is, since the coupling stopper 22 is fixed on the shaft support bearing case 20, the position of the gear 221 is constant, but the coupling 15 is rotatable with the dehydration shaft 5, so that the gear is stopped at the stop. The position of 151 is variable.

Accordingly, when switching to the washing state, the peak portion of the gear 151 of the coupling 15 and the peak portion of the gear 221 of the coupling stopper 22 may come into contact with each other. Is called a momentary restraint state for the coupling 15.

At this time, since the coupling 15 is slightly engaged with the serration 161b on the outer circumferential surface of the upper end of the inner connector 16b, the coupling 15 rotates, and as the peak of the gear on the coupling side meets the valley of the gear on the inner connector side, the coupling 15 rotates. The gear teeth 151 of the 15 and the gear teeth 221 of the coupling stopper 22 are naturally driven by the pushing action of the shock absorbing spring 11 provided between the mover 9 and the plunger 10 of the clutch mechanism of the present invention. The engagement is released to release the momentary restraint state for the coupling 15.

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.

In the above-described embodiment, the coupling rod 17 and the lever 8 are hinged, but the coupling between the connecting rod 17 and the lever 8 is not a hinge coupling. The material of the connecting rod may be made of a flexible material.

Hereinafter will be described a clutch motor applied to the present invention.

First, FIG. 12 is a perspective view of a clutch motor, and FIG. 13 is an exploded perspective view of FIG. 12. Hereinafter, the structure and operation of the clutch motor of the present invention will be described in detail with reference to these drawings.

In the clutch motor 6 of the present invention, the cam 600 is directly coupled to the drive shaft 602 so that the cam 600 rotates at a constant speed when the drive shaft 602 is rotated, and the cam at the position where the drive shaft 602 stops. 600) Also stopped.

For reference, the clutch motor 6 of the present invention changes and improves the structure of the drainage motor generally used for driving the drain valve, and is configured as a clutch mechanism driving motor, and a motor driving part such as a rotor and a stator has a conventional drainage motor. Is the same as

However, the drainage motor used for driving the drainage valve has a slip between the cam and the drive shaft to have a certain degree of slip, and the cam is rapidly returned when the drainage motor is turned off. Clutch motor 6 of the cam 600 and the drive shaft 602 is an assembly structure with no slip at all is prevented in the end (速 斷) is prevented, accordingly, the forming angle range of the cam groove provided in the cam 600 is also existing drainage It is formed differently from the cam of the motor.

That is, the clutch motor 6 of the present invention does not rotate the cam 600 unless the drive shaft 602 is rotated, the torque required for the rotation of the drive shaft 602 is larger than the restoring force of the return spring 14 Since the fastening of the cam 600 is prevented even when the clutch motor 6 is turned off, the occurrence of collision noise and the like due to the rapid return of the coupling 15 and the lever 8 is prevented, thereby realizing low noise during clutch operation. It becomes possible.

14A to 14C are schematic views for explaining an operation relationship between a cam and a switch when the clutch motor is driven. FIG. 14A is a state diagram of a cam and a switch at a washing mode maintenance point, and FIG. 14B is a view of switching to a dehydration mode. FIG. 14C is a cam and switch state diagram at an initial point. FIG.

15 is a time chart showing the operation relationship between the clutch motor, the cam and the switch of the present invention. Referring to these drawings, the operation relationship between the clutch motor, the cam, and the switch will be described below.

First, in the state where the cam 600 is located at the initial point, the switch 650 maintains the off state. Here, the state where the cam 600 is located at the initial point is a state in which the rod connecting shaft 601 of the cam 600 faces the initial point direction as shown in FIG. 14C.

In this state, when the power transmission path is switched for washing, the clutch motor 6 is turned on and driven, thereby rotating the cam 600 clockwise. At this time, since the projection 650a of the switch 650 is located on the cam groove surface 600a until the rotation angle of the cam 600 reaches a position that is 150 degrees from the initial point, the switch 650 is turned off. State is maintained.

Then, when the rotation angle from the initial point of the cam 600 reaches 150 degrees, the projection 650a of the switch 650 is out of the cam groove surface 600a of the cam 600, so that the switch 650 is turned on. (on)

As such, when the rotation angle from the initial point of the cam 600 reaches 150 degrees, the peak of the gear 151 of the coupling 15 and the peak of the gear 221 of the coupling stopper 22 It is in a state of being engaged with each other.

However, even after that, the on state of the clutch motor 6 continues, and when the cam 600 reaches the point 170 degrees from the initial point as shown in FIG. 14A, the clutch motor 6 is turned off. Thus, the clutch motor 6 ) Is turned off at the maintenance point of the cam 600 in order to more reliably switch the power to the washing mode.

On the other hand, when dehydration after washing is completed, the cam 600 should return to the initial point position.

To this end, when the power is switched to the dehydration mode, the clutch motor 6 is turned on again to rotate the cam 600 clockwise. At this time, the switch 650 maintains the on state, and when the rotating cam 600 passes the point 328 degrees clockwise from the initial point (158 degrees clockwise from the holding point), the protrusion of the switch 650 ( 650a is positioned on the cam groove surface 600a, whereby the switch 650 is turned off by contact dropping (see FIG. 14B).

Thereafter, even if the switch 650 is switched to the off state, the clutch motor 6 remains in the on state until the cam 600 reaches the initial point under the control of the microcomputer, so that the cam 600 is positioned at the initial point. Is off.

At this time, the clutch motor 6 is kept in the on state from immediately after the switch 650 is turned off until the cam 600 reaches the initial point, so that the on state of the clutch motor 6 is controlled in time. Since the rotation period of the clutch motor 6 is constant, the angle of arrival (that is, 32 degrees) from the off point of the switch 650 to the initial point is divided into one rotation period to keep the clutch motor 6 in the on state. The time is calculated.

On the other hand, in the state where the cam 600 is located at the initial point as described above, not only the gear teeth 151 of the coupling 15 and the gear teeth 221 of the coupling stopper 22 are released, but the coupling ( 15) The upper serration 150a and the lower serration 150b of the inner circumferential surface of the lower serration 161b on the outer circumferential surface of the upper end of the inner connector 16b coupled to the washing shaft 4 and the lower end of the dehydration shaft 5 By being engaged with each other at the same time, the dehydration by simultaneous rotation of the washing shaft 4 and the dewatering shaft 5 can be made.

As described above, the present invention has an effect that the rotational power transmitted to the washing shaft or dewatering shaft can be stably controlled in a short time when the rotational power is transmitted to the pulsator or dehydration tank by the drive unit of the stator and the rotor. .

In addition, the present invention is the drive shaft and the cam is rotated at a constant speed when the clutch motor is on, there is no rapid return action of the cam when the clutch motor is off, the elastic member is installed in a portion that is in contact with the coupling, the lifting according to the switching of the coupling Not only does the crash noise occur, but also the clutch mechanism can be realized, in which power switching is performed in a low noise state.

Claims (15)

A dewatering tank rotatably installed in the outer tank, A pulsator installed in the dewatering tank and rotatable independently of the dewatering 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 that transmits rotational power to the pulsator, BLDC motor in which the rotor rotates as the stator is energized, Geared motor installed in the lower part of the outer tank and transmitting power to the drive shaft connected to the cam by decelerating through the reduction gear provided therein.The torque required to rotate the drive shaft is larger than the restoring force of the return spring. The clutch motor that stays there, A cam coupled to the drive shaft of the clutch motor; A lever guide fixed on the shaft support bearing case; A lever having a groove having an inclined surface and a flat surface extending horizontally from the lower end of the inclined surface when the clutch motor is driven by a guide of a lever guide; A connecting rod installed between the cam and the lever of the clutch motor to pull the lever toward the clutch motor 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 locking protrusion on one side of the lever to give the lever a return force; A hollow cylinder type movable member having an upper end inclined to correspond to the inclined surface of the lever and being in contact with the groove having the inclined surface of the lever when dewatering, and then descending on the inclined surface when switching to the washing mode, and positioned below the flat surface; A plunger installed to move up and down along the guide groove inside the mover; A cushioning spring located between the mover and the plunger, A coupling stopper fixed to a lower portion of the shaft support bearing case and having gear teeth formed along a circumferential direction; One fore end hinged to the lower end of the plunger and a one-point middle point hinged to the lower end of the support bracket formed at the bottom of the coupling stopper so that the fork is moved around the one point of the hinged middle part when the plunger is lifted. ) A movable rod of the form, A coupling for switching the rotational power transmission path of the BLDC motor while moving up and down along the dehydration direction according to the rotational direction of the movable rod; An outer connector provided with an annular elastic member seating groove in the center of the upper surface as a resin material fastened by a fastening member to the rotor, The serration is integrally injection molded inside the outer connector and engaged with the serration of the lower end of the washing shaft on the inner circumferential surface thereof, and a serration for coupling with the coupling is formed on the outer circumferential surface of the upper end exposed to the outside of the outer connector. Inner connector made of metal, Fully automatic washing machine, characterized in that it comprises an elastic member installed in the seating groove of the outer connector. The method of claim 1, The inner connector is a full automatic washing machine, characterized in that made of aluminum alloy sintered body to improve the strength. The method of claim 1, Fully automatic washing machine, characterized in that the elastic member seated in the elastic member seating groove of the outer connector. The method of claim 3, wherein The rubber ring, An elastic rib having an inner diameter smaller than the outer diameter of the inner connector is formed in the lower portion of the inner rim, and an outer side of the annular rib for giving a radial margin to the elastic rib on the radially outer side of the elastic rib on the lower surface. Fully automatic washing machine characterized in that the protrusion ribs are radially spaced apart so that the groove is formed. The method of claim 3, wherein Fully automatic washing machine, characterized in that the groove in which the rubber ring is in close contact with the coupling lower surface of the upper surface of the rubber ring and the groove is provided to provide a cushion. The method of claim 1, On the outer peripheral surface of the upper end of the plunger fitted inside the mover, When assembling the plunger and the mover via a shock absorbing spring, even if the mover is pushed upward by the restoring force of the shock absorbing spring, the lower end of the guide hole formed in the axial direction on one side of the outer circumferential surface of the mover is caught so that the mover is not separated from the plunger Fully automatic washing machine, characterized in that the movable removal prevention piece is provided. The method according to claim 1 or 6, A guide rib having a length along an axial direction is formed on the outer circumferential surface of the mover, and a guide groove is formed on the inner surface of the guide part of the lever guide into which the mover is inserted to help linear movement of the mover. Fully automatic washing machine. The method of claim 1, One end of the return spring is formed in a ring shape to be caught by the locking projection of the lever, the other end is wound to have a larger diameter than the other portion to be fixed to the position is fixed to the rear end of the lever guide. The method of claim 1, The connecting rod has one end coupled to the cam and the other end hinged to the lever, Fully automatic washing machine characterized in that a stopper is formed at one end of the lower side of the lever to which the connecting rod is coupled to define the insertion position of the lever into the lever guide when the restoring force of the return spring is applied. The method of claim 1, And a compression spring for pushing the coupling downward when switching to the dehydration mode between the upper surface and the lower bearing of the coupling. The method of claim 1, A protrusion is provided on the outer side of the coupling stopper to be located between the plunger and the support bracket of the coupling stopper. The fork-type movable rod directly below the protrusion is provided with a connecting portion for connecting across the rods on both sides, and between the protrusion and the connecting portion is provided with a tension spring for applying a rotational force so that the movable rod rotates clockwise around the fixing pin when dewatering. Fully automatic washing machine characterized by. The method of claim 1, The coupling is, The upper end of the cylindrical body is provided with a radially extending flange portion, a gear tooth that can be joined to the gear of the coupling stopper on the upper edge of the flange portion is formed along the circumferential direction, and the serration and connector assembly of the dehydration shaft is formed on the inner circumferential surface of the cylindrical body. A serration is provided for engaging the serration on the outer circumferential surface of the upper end of the inner connector, and the pitch of the serration formed on the inner circumferential surface of the body of the coupling is inner when the coupling is completely lowered and engaged with the inner connector. Fully automatic washing machine, characterized in that the upper side and the lower side is formed to have different modules based on the upper position of the connector. The method of claim 12, The module ratio of the serration formed on the inner circumferential surface of the coupling and the serration formed on the lower portion is 1: 1.5, and the serration is located on the lower side of the serration formed on the inner circumferential surface of the coupling. The lower end of the fully automatic washing machine, characterized in that the rounded processing to form an involute profile surface (intervolute profile surface) to facilitate engagement and separation with the serration of the inner connector. The method of claim 12 or 13, Fully automatic washing machine characterized in that the point where each valley of the lower side and the lower side of the upper serration formed on the inner circumferential surface of the coupling meets the torsional stress by reducing the rapid cross-sectional change. The method of claim 14, Fully automatic washing machine, characterized in that a plurality of projections are formed along the circumferential direction on the bottom surface of the body of the coupling.