KR19990005821U - Clutch of fully automatic washing machine - Google Patents

Abstract

The present invention is to reduce the number of parts by improving the clutch structure of the automatic washing machine to reduce the cost, and to make the switching operation of the clutch according to the washing and dehydration more stable.

To this end, the present invention provides a small gear 7 and a large gear 8 of different teeth and diameters to the drive shaft 6 rotatably installed through one side of the clutch housing 4 mounted under the outer tub 3. And a dehydration shaft (11) coupled to the washing shaft (9) and the outer tub (3) installed on one side of the drive shaft (6), the dewatering gear (12) with gears facing inward and the washing machine (10) selectively engaged therewith. Acceleration gear 15 is provided on the outer circumferential surface of the washing shaft (9) by the drive means to be elevated along the washing shaft (9) and engaged with the small gear (7) and the large gear (8) of the drive shaft (6). And a power transmission shaft 13 having a reduction gear 14 so as to rotate by the driving force of the motor 16 when the power transmission shaft 13 is lowered by the action of the driving means. When the rotational speed is decelerated and transmitted to the pulsator 1, washing is performed, and when the power transmission shaft 13 is raised, Is accelerated and the rotational speed of the shaft 6 is transmitted to the dewatering tank (2) it is a clutch of a fully automatic washing machine such that dehydration is in progress.

Description

Clutch of fully automatic washing machine

The present invention relates to a clutch of a fully automatic washing machine, and more particularly, to reduce the cost by improving the clutch structure to reduce the number of parts, and to make the switching operation of the clutch according to washing and dehydration more stable. .

In general, a fully automatic 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 pulsator and the impact action of the pulsator on the laundry. As the sensor detects the amount and type of laundry, the washing method is automatically set, and the washing water is supplied to an appropriate level according to the amount and type of the laundry, and then washing is performed under the control of the microcomputer.

As shown in FIG. 1, the conventional fully automatic washing machine is rotatably provided with a dehydration tank combined washing tank 2 having a plurality of dehydration holes in the outer tank 3 installed in the outer case 25. A pulsator 1 is rotatably installed in the lower center of (2), and a clutch 26 for transmitting power to the dehydration tank and the pulsator 1 is installed in the lower part of the outer tank 3.

In addition, a motor 16 is installed at one lower side of the outer tub 3, and V is connected between the motor pulley 27 coupled to the shaft end of the motor 16 and the clutch pulley 5 connected to the clutch 26. Belt 28 is connected.

On the other hand, the clutch 26, as shown in Figure 2, the gear shaft 29 is installed on the clutch pulley 5, the washing shaft 9a is installed on the gear shaft 29, the washing shaft ( 9a) The dehydration shaft 11a is provided outside.

At this time, the lower end of the dehydration shaft (11a) is fixed to the upper gear housing 30, the lower gear housing 31 is fixed to the upper gear housing 30, the gear unit for reducing the power inside the gear housing 32 is installed.

In addition, a spring block 33 and a clutch boss 34 are fixed to the lower end of the gear shaft 29, and a brake lever 35 interlocked with the drain valve actuation solenoid 19 is provided at the outer circumference of the clutch boss 34. Is installed, the lower end of the brake lever 35, the operation cam 36 is rotated in conjunction with the operation of the brake lever 35 is installed.

Conventional clutches configured as described above are operated as follows when washed and dehydrated.

First, during washing, the brake lever 35 is pushed out because the drain valve acting solenoid valve is in an off state. Accordingly, the clutch boss 34 meshes with the actuating cam 36 to increase the diameter of the clutch spring 37. Will be pushed in the direction.

Accordingly, the clutch spring 37 having an increased diameter maintains the spaced apart from the outer circumferential surface of the spring block 33.

Therefore, the rotational force of the motor 16 is transmitted to the clutch pulley 5 by the V-belt 28, and then to the gear shaft 29 connected thereto, and the washing shaft connected to the upper gear shaft 29 again ( It is delivered to the pulsator 1 through 9a) to rotate the pulsator 1.

In addition, during dehydration, when the wash water in the dehydration tank is naturally drained, the solenoid valve for combined use of the drain valve actuates to pull the brake lever 35 so that the actuating cam 36 separates from the serration of the clutch boss 34. As the clutch spring 37 is reduced in diameter, the restoring force at this time causes the clutch spring 37 to clamp the lower gear housing 31 and the spring block 33 at the same time.

Meanwhile, when the gear shaft 29 powered by the motor 16 rotates, the spring block 33 fixed to the gear shaft 29 rotates like the gear shaft 29, and at this time, the spring block 33 And the clutch spring 37 clamping the lower gear housing rotate in the winding direction, thereby exhibiting a more powerful clamping force to rotate the gearbox without slipping.

Therefore, the power transmitted to the clutch 26 when the motor 16 is driven is transmitted not only to the washing shaft 9a but also to the dehydration shaft 11a to rotate the dehydration tank at high speed to proceed with dehydration.

However, the conventional clutch 26 has such a problem that the number of parts is very large and the number of assembly operations is very large, and the manufacturing cost of the clutch 26 is also increased due to the large number of parts.

In addition, when the assembly degree is low, the switching operation according to the washing and dehydration operation is made unstable properly, noise is generated from the bearing pressed into the clutch housing (4) to reduce the consumer's confidence in the washing machine There were many problems.

The present invention is to solve the above-mentioned problems, the cost reduction by reducing the number of parts by improving the structure of the clutch 26 of the washing machine, while the automatic operation to make the switching operation of washing and dehydration more stable The purpose is to provide a clutch of a washing machine.

1 is a longitudinal sectional view showing a conventional fully automatic washing machine

FIG. 2 is an enlarged detailed view of the clutch of FIG.

3a and 3b is a longitudinal sectional view showing a clutch operating state according to the present invention,

3A is a clutch state diagram at the time of washing

3B is a clutch state diagram at the time of dehydration

Explanation of symbols for the main parts of the drawings

1: pulsator 2: washing tank

3: outer tub 4: clutch housing

5: clutch pulley 6: drive shaft

7: Small gear 8: Large gear

9: washing shaft 10: washing gear

11: Dehydration 12: Dehydration gear

13: Power transmission shaft 14: Reduction gear

15: Acceleration gear 16: Motor

17: Internal gear 18: External gear

19: Solenoid 20: Plunger

21: oilless bearing 22: guide shaft

23: elastic member 24: support flange

In order to achieve the above object, the present invention is to install a small gear and a large gear of different teeth and diameter in the drive shaft rotatably installed through one side of the clutch housing mounted on the outer tub lower, washing shaft installed on one side of the drive shaft And a dehydration gear coupled to the outer tank and a dewatering gear in which the gears face inward and a washing machine gear selectively engaged therewith, and the outer circumferential surface of the washing shaft is lifted along the washing shaft by a driving means to fit the small gear and the large gear of the driving shaft. The physics is provided with a power transmission shaft having an acceleration gear and a reduction gear, and when the power transmission shaft is lowered by the action of the driving means, the rotation speed of the rotating drive shaft is decelerated by the driving force of the motor and transmitted to the pulsator so that washing can proceed. When the power transmission shaft is raised, the rotation speed of the drive shaft is accelerated to the dehydration tank. Month doemeurosseo a clutch of a fully automatic washing machine such that dehydration is in progress.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a longitudinal sectional view showing a clutch of a fully automatic washing machine according to the present invention, the present invention is a clutch housing (4) below the outer tank (3) of the washing machine in which the pulsator (1) and the combined dehydration tank (2) ) Is mounted, and one side of the clutch housing 4 has a drive shaft 6 coupled to one end of the clutch pulley 5 to be rotatably installed through the clutch housing 4, and the shaft is disposed on the drive shaft 6. Small gears 7 and large gears 8 having different number of teeth and diameters spaced apart at regular intervals along the direction are mounted, respectively.

On the other hand, the other side of the clutch housing (4) is provided with a washing shaft (9) which penetrates the outer tub (3) and the washing tank (2) and is coupled to the pulsator (1), and on one side outer circumferential surface of the washing shaft (9) The washing machine 10 is installed.

In addition, the dehydration shaft (11) penetrating the outer tub (3) and coupled to the washing tank (2) is provided such that its lower end is spaced apart from the washing shaft (9) outside the clutch housing (4) by a predetermined interval, and the dehydration shaft ( 11) On the inner circumferential surface of the lower part, a dehydration gear 12 having gears inwardly is installed.

In addition, a power transmission shaft 13 having an upper end portion spaced apart from the outer circumferential surface of the washing shaft 9 by a washing shaft 9 is installed on the washing shaft 9 so as to be lifted and lowered, and the power transmission shaft 13 Reduction gear 14 having a different number and diameter of teeth at the lower end to be selectively engaged with the small gear 7 and the large gear 8 of the drive shaft 6 in accordance with the lifting movement of the power transmission shaft 13 and The accelerator gears 15 are mounted respectively.

In addition, an internal gear 17 engaged with the washing machine 10 is mounted on the inner circumferential surface of the upper end of the power transmission shaft 13 to transmit the driving force of the motor 16 to the washing shaft 9 through the driving shaft 6. .

On the other hand, on the outer circumferential surface of the upper end of the power transmission shaft 13, the dehydration gear 12 of the lower inner peripheral surface of the lower end of the dehydration shaft 11 to transmit the driving force of the motor 16 to the dehydration shaft 11 when the power transmission shaft 13 is raised. External gear 18 is engaged.

In addition, the clutch housing 4 is equipped with a driving means for elevating the power transmission shaft for raising or lowering the power transmission shaft 13 under the control of a microcomputer (not shown).

At this time, the driving means for driving the power transmission shaft is a solenoid 19 is installed on one side wall of the inner surface of the clutch housing 4, the one end is embedded inside the solenoid 19 and the other end is a power transmission shaft It is connected to the (13) is composed of a plunger (20) for interlocking the power transmission shaft (13) by rising by the suction force of the electromagnet when the solenoid (19) on, while lowering by its own weight when the solenoid (19) off.

On the other hand, an oilless bearing 21 is installed between the upper end of the dehydration shaft and the washing shaft installed through the dehydration shaft.

In addition, the clutch housing 4 is provided with a guide shaft 22 fixed through the solenoid 19 and the plunger 20 to guide the linear movement of the plunger 20.

In addition, an elastic member 23 such as a compression spring for additionally lowering the plunger 20 by applying a restoring force to the plunger 20 when the solenoid 19 is off is installed inside the solenoid 19.

On the other hand, when the solenoid 19 is operated on the outer circumferential surface of the lower side of the washing shaft 9, the power transmission shaft 13, which is lowered by interlocking by the plunger 20, is prevented from sagging downward while the power transmission shaft 13 is The support flange 24 which serves as a stopper for defining the lowering position is formed.

The clutch 26 of the present invention configured as described above operates as follows when washed and dehydrated.

First, at the time of washing, since power is not applied to the solenoid 19 installed on one side wall of the clutch housing 4, the solenoid 19 is turned off, so that the one end of the solenoid 19 has a built-in plunger 20. Is lowered along the guide shaft 22 is located at the bottom dead center.

Accordingly, as shown in FIG. 3A, the reduction gear 14 formed at the lower end of the power transmission shaft 13 is engaged with the small gear 7 of the drive shaft 6.

At this time, by the gear ratio between the small gear 7 and the reduction gear 14, the rotation speed of the drive shaft 6 is decelerated and transmitted to the washing shaft 9.

On the other hand, since the support flange 24 for supporting the power transmission shaft 13 is formed on one outer circumferential surface of the lower end of the washing shaft 9, the power transmission shaft lowered by interlocking by the plunger 20 when the solenoid 19 is operated. (13) This phenomenon is prevented from sagging down due to its own weight.

That is, during washing, the solenoid 19 is turned off as described above, and as the plunger 20 descends, the washing shaft 9 interlocks and descends so that the small gear 7 of the driving shaft 6 and the washing shaft ( When the reduction gear 14 of 9) is engaged, the external gear 18 installed on the outer circumferential surface of the upper end of the washing shaft 9 is separated from the dehydration gear 12 formed inwardly on the inner circumferential surface of the lower end of the dehydration shaft 11 so as not to be engaged. .

Therefore, during washing, the driving force of the motor 16 is transmitted to the power transmission shaft 13 through the drive shaft 6, and then transferred only to the washing shaft 9 and again connected to the washing shaft 9 (pulsator ( 1), the pulsator 1 is inverted left and right according to the forward and reverse rotation of the motor 16, thereby washing the laundry introduced into the washing tank 2.

On the other hand, unlike the above, during dehydration, when the washing water in the washing tank 2 is naturally drained and the power is applied to the solenoid 19, when the solenoid 19 is turned on, the inside of the solenoid 19 is attracted by the electromagnet suction force. The plunger 20 is sucked into the solenoid 19 while compressing the elastic member 23.

At this time, the power transmission shaft 13 which is connected to the front end of the plunger 20 is interlocked with the plunger 20 to rise along the washing shaft 9, and as shown in FIG. The reduction gear 14 of (13) is released in engagement with the small gear (7) of the drive shaft (6), but the accelerator gear (15) of the power transmission shaft (13) is the large gear (8) of the drive shaft (6). Is interlocked with.

At the same time, the external gear 18 formed on the outer circumferential surface of the upper end of the power transmission shaft 13 is engaged with the dehydration gear 12 formed inward on the outer circumferential surface of the lower end of the dehydration shaft 11.

On the other hand, the internal gear 17 formed on the inner circumferential surface of the upper end of the power transmission shaft 13 is maintained in engagement with the washing machine of the laundry shaft 9 despite the synergy of the power transmission shaft 13, which is inscribed This is because the gear width of the gear 17 is formed to ensure a sufficient length.

Accordingly, when the power transmission shaft 13 is raised, the internal gear 17 of the inner peripheral surface of the upper end of the power transmission shaft 13 meshes with the laundry shaft 9 and the external gear 18 of the upper peripheral surface of the upper end portion of the power transmission shaft 13 is dehydrated gear 12. Engaged in the washing shaft 9 and the dehydration shaft 11 are both able to receive the driving force of the power transmission shaft (13).

At this time, the rotation speed of the drive shaft 6 is accelerated by the gear ratio of the large gear 8 and the accelerator gear 15 to be transmitted to the washing shaft 9.

That is, as described above, during dehydration, the driving force of the washing motor 16 is transmitted to the drive shaft 6 through the motor pulley 27 and the clutch pulley 5, and then the power transmission shaft connected to the drive shaft 6 again. It is transmitted to (13), and rotates the washing shaft (9) and the dewatering shaft (11) engaged with the power transmission shaft (13) at high speed, thereby, combined with the washing tank (2) connected to the dewatering shaft (11) The dehydration is carried out by centrifugal force due to the high speed rotation of the dehydration tank.

In other words, during washing, the power transmission shaft 13 is not connected to the dehydration shaft 11 so that the driving force of the washing motor 16 is not transmitted to the dewatering shaft 11, so that the driving force of the washing motor 16 is power transmission. It is transmitted to the pulsator 1 through the washing shaft 9 engaged with the shaft 13 to rotate the pulsator 1.

And during dehydration, the driving force of the washing motor 16 is connected to the dehydration shaft 11 by rotating the washing shaft 9 and the dehydration shaft 11 simultaneously engaged with the power transmission shaft 13 at high speed. The dehydration is performed by centrifugal force caused by the high speed rotation of the combined dehydration tank.

On the other hand, in the above embodiment, the small gear 7 and the large gear 8 mounted on the drive shaft 6, the reduction gear 14 and the accelerator gear 15 mounted on the power transmission shaft 13, the internal gear ( 17), the external gear 18 and the washing machine gear 10 and the dehydration gear 12 mounted to the washing shaft 9 and the dewatering shaft 11, respectively, the drive shaft 6 and the power transmission shaft 13 And the washing shaft 9 and the dehydration shaft (11) has been described as separately mounted, but it is a matter of course that the gears may be integrally formed on the respective shafts.

Therefore, the washing machine clutch of the present invention has a simple structure and switches at the time of washing and dehydration, unlike a conventional clutch composed of many parts such as an operation cam and a spring block, a clutch boss, a clutch spring, and a water seal that interlock with a brake lever. Since the operation is performed reliably, the service life and reliability of the clutch can be improved.

That is, the present invention improves the reliability of the washing machine by improving the clutch 26 structure of the washing machine, thereby reducing the number of parts, and making the switching operation during washing and dehydration more stable. It becomes possible.

Claims (7)

In a washing machine in which an outer tank and a washing tank are built in an outer case and a pulsator is mounted at the center of the washing tank, and the washing and dehydration is performed by selectively rotating the pulsator or the washing tank by the driving force of the motor under the outer tank. A clutch housing mounted under the outer tank, A drive shaft rotatably installed penetrating through one side of the clutch housing and coupled to a clutch pulley that rotates under the power of the washing motor; Small gears and large gears which are mounted spaced apart at regular intervals along the axial direction on the drive shaft, and having different teeth and diameters, A washing shaft having one end coupled to the pulsator and the other end rotatably installed under the clutch housing through the outer tub and the washing tub; A washing machine mounted on the shaft of the laundry shaft, A dehydration shaft coupled to the washing tank through the outer tank and installed at a predetermined interval outside the washing shaft in the clutch housing; A dewatering gear installed at the lower end of the dehydrating shaft so that the gear is inward; A power transmission shaft installed on the outer circumferential surface of the washing shaft and configured to be spaced apart from the outer circumferential surface of the washing shaft by a predetermined distance; Reduction gears and accelerator gears of different teeth and diameter are mounted on the lower end of the power transmission shaft and selectively engaged with the small gear and the large gear of the drive shaft according to the lifting motion of the power transmission shaft, An internal gear mounted on an inner circumferential surface of the upper end of the power transmission shaft and engaged with a washing machine gear of the laundry shaft to transmit the rotational force of the power transmission shaft to the washing shaft; An external gear which is mounted on an outer circumferential surface of the upper end of the power transmission shaft and meshes with a dehydration gear of the dehydration shaft to transmit the rotational force of the power transmission shaft to the dehydration shaft when the power transmission shaft is raised; And a power transmission shaft lifting driving means mounted in the clutch housing and configured to raise or lower the power transmission shaft according to the control of the microcomputer. The method of claim 1, Clutch of the automatic washing machine, characterized in that the oilless bearing is installed between the upper end of the dehydration shaft and the washing shaft installed through the dehydration shaft. The method of claim 1, Small gears and large gears mounted on the drive shaft, reduction gears, acceleration gears and internal gears, external gears mounted on the power transmission shaft, and the drive shafts and the power instead of the washing machine and the dewatering gears respectively mounted on the washing shaft and the dehydration shaft. Clutch of a fully automatic washing machine, characterized in that the gear is formed integrally on the transmission shaft and the shaft of the laundry shaft and the dehydration shaft. The method of claim 1, The drive means for driving the power transmission shaft, A solenoid installed on one side wall of the inner surface of the clutch housing; One end is embedded in the solenoid and the other end is connected to a power transmission shaft, and the plunger interlocks the power transmission shaft by rising by the suction force of the electromagnet when the solenoid is on and lowering by the weight when the solenoid is off. Fully automatic washing machine clutch. The method of claim 2, The solenoid clutch of the automatic washing machine, characterized in that the elastic member, such as a compression spring for additionally providing a restoring force to the plunger when the solenoid is off to forcibly lower the plunger. The method according to claim 1 or 2, On the outer circumferential surface of the lower side of the washing shaft, when the solenoid is operated, the supporting shaft is prevented from falling down due to its own weight by interlocking by the plunger, and a supporting flange is formed to serve as a stopper for defining the lowering point of the transmission shaft. Clutch of fully automatic washing machine. The method of claim 2, One side of the clutch housing is a clutch of a full-automatic washing machine, characterized in that the guide shaft penetrates the solenoid and the plunger and is parallel to the washing shaft to guide the linear movement of the plunger.