KR20020042170A - clutch of automatic washing machine - Google Patents

Abstract

PURPOSE: A clutch of an automatic washer is provided to simplify the structure of the washer, to improve a washing performance, and to reduce a manufacturing cost and a maintenance cost. CONSTITUTION: A clutch of an automatic washer includes a first direction rotating part and a second direction rotating part. The first direction rotating part is disposed between a wash shaft(401) and a dehydration shaft(402) and allows only a one-directional rotation of the wash shaft relative to the dehydration shaft. The second direction rotating part is disposed on the dehydration shaft for rotatably supporting the dehydration shaft, and allows only the rotation of an opposite direction to the rotation direction of the first direction rotating part.

Description

Clutch of automatic washing machine {clutch of automatic washing machine}

The present invention relates to a clutch of a fully automatic washing machine, and more particularly, to a clutch of a fully automatic washing machine configured to selectively transmit rotational force of a motor to a washing blade and a washing tank.

In general, a fully automatic washing machine removes various contaminants attached to clothes, bedding, etc. by using the emulsification action of the detergent and the friction action of the water flow due to the rotation of the pulsator, and the impact action of the washing wing 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 12 having a plurality of dehydration holes in the outer tank 2 installed in the outer case 11. In the center of the lower portion of the washing blade (1) is rotatably installed, the lower portion of the outer tank (2) is provided with a clutch (4) for transmitting power to the washing tank 12 and the washing blade (1) do.

In addition, a motor 3 is installed at one lower side of the outer tub 2, and between the motor pulley 13 coupled to the shaft end of the motor 3 and the clutch pulley 14 connected to the clutch 4. The belt 15 is connected.

Meanwhile, as illustrated in FIG. 2, the clutch 4 has a gear shaft 5 installed on the clutch pulley 14, a washing shaft 16 installed on the gear shaft 5, and the washing shaft ( 16) Dehydration shaft 17 is provided on the outside.

At this time, the lower end of the dehydration shaft 17 is fixed to the brake drum (18a) also serves as the upper gear housing, the lower gear housing (18b) is coupled to the lower portion of the brake drum (18a), inside the brake drum (18a) A gear unit 19 for reducing power is provided.

In addition, a spring block 10 and a clutch boss 6 are fixed to the lower end of the gear shaft 5, and a brake that is interlocked according to the operation of the drain valve acting solenoid (not shown) on the outer circumference of the clutch boss 6. A lever 20 is installed, and a clutch lever 23 is installed at one side of the brake lever 20 so as to interlock when the brake lever 20 is operated, and a clutch lever 23 at a lower end of the clutch lever 23. The operation cam 21 is rotated in conjunction with the operation of the installation.

The clutch 4 configured as described above operates as follows when washed and dehydrated.

First, at the time of washing, since the drain valve actuation solenoid valve (not shown) is turned off, the clutch lever 23 is pushed by the operation of the brake lever 20, and the clutch boss is coupled to the actuating cam 21. (6) is engaged and pushes the clutch spring 9 in the direction of increasing diameter.

Accordingly, the clutch spring 9 having an increased diameter keeps the state spaced apart from the outer circumferential surface of the spring block 10.

Therefore, the rotational force of the motor 3 is transmitted to the clutch pulley 14 by the V-belt 15, and then to the gear shaft 5 connected thereto, and again the washing shaft connected to the upper gear shaft 5 ( It is delivered to the washing blade (1) through 16 to rotate the washing blade.

In addition, during dehydration, when the wash water in the dehydration tank 12 is naturally drained, the drain valve actuation solenoid valve is operated to pull the brake lever 20 so that the actuating cam 21 is interlocked with the clutch lever 23. As the clutch spring 9 is separated from the serration of 6, the diameter of the clutch spring 9 is reduced, and the clutch spring 9 simultaneously moves the lower gear housing 18b and the spring block 10 by the restoring force. Will be clamped.

On the other hand, when the gear shaft 5 received the power of the motor 3 rotates, the spring block 10 fixed to the gear shaft 5 rotates like the gear shaft 5, at this time the spring block ( 10) and the clutch spring 9 clamping the lower gear housing 18b rotate in the winding direction, thereby exhibiting a stronger clamping force, thereby rotating the brake drum 18a and the gear unit 19 without slipping. .

Therefore, at the time of dehydration, the power transmitted from the motor 3 to the clutch 4 is transmitted not only to the washing shaft 16 but also to the dewatering shaft 17, thereby rotating the dewatering tank 12 which is also a washing tank at high speed so that dehydration can be performed. Will proceed.

On the other hand, at the time of dehydration stop, the brake band 7 comes into close contact with the outer circumferential surface 181 of the brake drum 18a and is forcedly braked to stop the dehydration tank 12.

However, the conventional washing machines having such a configuration and operation have a complicated structure of the clutch, which is difficult to manufacture, which leads to a decrease in productivity, as well as the use of precision parts, which increases the manufacturing cost of the washing machine. There was a high problem that this may occur.

The present invention is to solve the above-mentioned problems, and the object is to provide a clutch of a fully automatic washing machine that can improve the washing performance while the structure is simple and accurate operation.

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

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

3 is a longitudinal sectional view showing main parts of a clutch structure of a washing machine according to the present invention;

Explanation of symbols on the main parts of the drawings

40-Clutch 401-Laundry Shaft

402-Shrinkage 411-Drive Case

414-Ring Gear 415-Planetary Gear

416-Sun Gear 421-One-Way Bearing

431-2nd Way Bearing

In order to achieve the above object, the present invention is coupled to the washing blade in the lower part of the outer tub of the washing machine is rotated directly receiving the rotational force of the motor, and the rotating shaft is coupled coaxially to the outer side of the washing shaft and the dehydration shaft coupled to the washing tank And a washing machine clutch configured to selectively transmit the rotational force of the motor to the washing blade and the washing tank, wherein a first one-way rotation means is provided between the washing shaft and the dehydration shaft to allow only one-way rotation of the washing shaft with respect to the dewatering shaft. The dehydration shaft is provided with a second one-way rotation means for allowing rotation in the opposite direction to the first one-way rotation means and rotatably supporting the dehydration shaft, and the dewatering shaft is washed by the first one-way rotation means. When the shaft rotates in the rotation allowable direction, the dehydration shaft is rotated in a direction opposite to the washing shaft rotation direction. It provides a clutch of a fully automatic washing machine, characterized in that the reverse rotation / deceleration means for reducing the motor rotational force.

And, according to one aspect of the invention, the rotational restraint direction of the first one-way rotation means is the same as the rotational direction of the washing tank when dewatering, and the rotational restraint direction of the second one-way rotation means is the same as the rotational direction of the washing blade when washing It is characterized by the same.

According to the present invention, when washing the washing blade and the washing tank rotates in the opposite direction to perform the washing, when dewatering the washing blade and the washing tank to rotate integrally to rotate in the opposite direction to the rotation direction when washing. As a result, it is possible to obtain improved washing performance with a simple clutch structure.

Hereinafter, an embodiment of a clutch of a fully automatic washing machine according to the present invention will be described in detail with reference to the accompanying drawings.

In the following description, the main components of the washing machine will be described with reference to the related art described above with reference to FIG. 1, and a detailed description thereof will be omitted.

3 is a longitudinal cross-sectional view showing the structure of the washing machine clutch 40 according to the present invention. As shown in FIG. 3, the V belt 15 is attached to the pulley 13 of the motor 3 (see FIG. 1) installed in the lower part of the washing machine. 1, the washing shaft 401, one end of which is coupled to the washing blade 1 (see FIG. 1), is fixedly coupled to a central portion of the clutch pulley 14 to which the rotational force is transmitted through the medium. On the outer side of the shaft 401, a dehydration shaft 402 that engages with the washing tub 12 (see FIG. 1) is rotatably provided.

An oilless bearing 403 is interposed between the laundry shaft 401 and the upper end of the dehydration shaft 402.

In addition, an upper cover 404 fixed to the bottom of the outer tub 2 at the middle of the dehydration shaft 402 to rotatably support the dehydration shaft 402 through the upper bearing 409 and the lower bearing 410. ) And a lower cover 405 is provided.

The brake drum 406 is fixed to the dehydration shaft 402 inside the clutch cover, and the brake band 408 and the brake band 408 are closely attached to the brake drum 406 on the outer circumference of the brake drum 406. The brake lever 407 is provided to separate.

In addition, the lower portion of the lower cover 405 of the clutch cover extends downwards to protect the driving unit installed on the lower end of the washing shaft 401 and the dehydration shaft 402 from the outside to support the drive case 411 bolts and nuts, etc. It is fixed by the fastening means of.

Meanwhile, a needle bearing 422 rotatably supporting the laundry shaft 401 and the dehydration shaft 402 is interposed between the washing shaft 401 and the lower end of the dehydration shaft 402. Directly below 422, the first one-way bearing 421 is installed to support the laundry shaft 401 in one direction only with respect to the dehydration shaft 402, that is, the rotation in the other direction is constrained. have.

Here, the first one-way bearing 421 is allowed to rotate leftward in the drawing and the rightward rotation is constrained.

Therefore, when the washing shaft 401 receives a force to turn left, the washing shaft 401 may freely turn left with respect to the dehydration shaft 402. However, when the washing shaft 401 receives the force to turn right, the first one-way bearing ( The washing shaft 401 is rotated together with the dehydration shaft 402 by 421.

On the other hand, the lower end of the dehydration shaft 402 is provided with a ring gear 414 extending downward and fixed to the inner peripheral surface of the gear teeth (gear teeth) is formed, the planetary gear 415 inside the ring gear 414 Is geared to the gear of the ring gear, the planetary gear 415 is interlocked with the sun gear 416 (sun gear) formed integrally with the lower end of the washing shaft (401).

Here, the planetary gear 415 is coupled to the carrier 418 installed with the O-ring 417 interposed at the lower end of the washing shaft 401.

In addition, between the lower end of the driving unit case 411 and the carrier 418, a second one-way bearing 431 for supporting the carrier 418 to rotate only in one direction, and a ball bearing as an auxiliary support means. 432 is provided.

The second one-way bearing 431 is to allow only the rotation in the opposite direction to the first one-way bearing 421, that is to say the right rotation is allowed in the drawing and the left rotation is constrained. have.

The washing machine clutch configured as described above operates as follows during washing mode operation and dehydration mode operation of the washing machine.

First, in the washing mode, the washing shaft 401 is subjected to the force to rotate to the left on the drawing. At this time, the first one-way bearing 421 is allowed to turn left, so that the washing shaft 401 can rotate about the dewatering shaft 402.

On the other hand, as the carrier 418 is constrained to the left by the second one-way bearing 431, the carrier 418 and the planetary gear 415 installed on the carrier are fixed at the position to rotate only. In this state, the sun gear 416 is rotated by the rotation of the washing shaft 401, so that the planetary gear 415 and the ring gear 414 engaged therewith are in the opposite direction to the washing shaft rotational direction. It rotates to the right, thereby rotating the dehydration shaft 402 fixed to the ring gear 414.

Therefore, during washing, the washing blade 1 rotates left by the left turn of the washing shaft 401, and at the same time, the washing tub 12 combined with the dehydration shaft 402 rotates in the opposite direction, that is, rotates to the right. Will be performed.

At this time, as the dewatering shaft 402 rotates through the gear unit connected to the sun gear 416, the planetary gear 415 and the ring gear 414, the number of revolutions of the washing blade (1) by their reduction ratio The rotational speeds of the washing tub 12 are different from each other.

On the other hand, in the laundry mode operated as described above, since the dewatering shaft 402 must be able to rotate differently from the conventional method, the brake lever 407 is operated to separate the brake band 408 from the brake drum 406. Of course, this must be preceded.

On the other hand, in the dehydration mode, the washing shaft 401 is subjected to the rotational force in the opposite direction, that is, in the right direction than in the washing mode, in this case, the first turn because the right turn is constrained by the first one-way bearing 421 The dewatering shaft 402 fixedly coupled to the outer ring of the one-way bearing 421 and the ring gear 414 fixed to the dewatering shaft 402 rotate right along with the washing shaft 401.

Therefore, during dehydration, the washing blade 1 coupled to the washing shaft 401 and the washing tub 12 coupled to the dehydrating shaft 402 rotate together to perform the dehydrating stroke.

In the above-described embodiment, the washing shaft is rotated by a pulley connected to the motor. Alternatively, the washing shaft may be directly coupled to the direct type motor and rotated.

As described above, according to the present invention, the structure of the clutch is simple and the operation can be made precisely, so that manufacturing and maintenance are easy, and the overall cost is reduced, and the washing wing and the washing tank rotate in opposite directions when washing. And since washing is performed, washing performance is improved.

Claims (7)

The washing shaft coupled to the washing blade under the outer tub of the washing machine receives the rotational force of the motor directly, and has a washing shaft rotating on the outer side of the washing shaft, which is coaxially coupled to the outer side of the washing shaft and combined with the washing tank. In the clutch for a washing machine to selectively transmit to, Between the washing shaft and the dehydration shaft is provided with a first one-way rotation means for allowing only one direction rotation of the washing shaft relative to the dehydration shaft, the dehydration shaft allows only the rotation in the opposite direction to the first one-way rotation means and the dehydration shaft Clutch of the fully automatic washing machine characterized in that the second one-way rotation means for supporting the rotatable. According to claim 1, wherein the dehydration shaft is rotated by the first one-way rotation means for rotating the dehydration shaft in a direction opposite to the washing shaft rotation direction when the washing shaft is rotated in the allowable direction for reducing the motor rotational force Clutch of a fully automatic washing machine characterized in that it further comprises a reverse rotation / deceleration means. The clutch of claim 1 or 2, wherein the first one-way rotating means is installed between the laundry shaft and the dehydration shaft to be a first one-way bearing. According to claim 1 or claim 2, wherein the second one-way rotation means extending from the lower end of the clutch cover and the drive case case to surround and protect the outer dehydration lower portion, installed between the drive unit case and the dehydration shaft The clutch of the fully automatic washing machine, characterized in that the second one-way bearing (1way bearing) that can be rotated only in one direction. According to claim 2, wherein the reverse rotation / deceleration means is fixed to the lower end of the de-shrinkable ring gear portion is formed on the inner peripheral surface (gear teeth), and the planetary gear portion meshing with the gear teeth in the ring gear portion inside And a sun gear unit fixed to the washing shaft to mate with the planetary gear to drive the planetary gear, and a carrier to support the second one-way rotation means while the planetary gear is rotatably installed. Clutch of the automatic washing machine, characterized in that configured. According to claim 1, wherein the rotational restraint direction of the first one-way rotation means is the same as the rotational direction of the washing tank when dewatering, and the rotational restraint direction of the second one-way rotation means is the same as the rotational direction of the washing blades when washing Clutch of fully automatic washing machine. The washing shaft coupled to the washing blade under the outer tub of the washing machine receives the rotational force of the motor directly, and has a washing shaft rotating on the outer side of the washing shaft, which is coaxially coupled to the outer side of the washing shaft and combined with the washing tank. In the clutch for a washing machine to selectively transmit to, A first one-way bearing is disposed at the lower end of the washing shaft and the dewatering shaft to allow rotation in one direction; A ring gear part having gears formed on an inner circumferential surface thereof, a planetary gear part engaged with the gear teeth inside the ring gear part, and a sunshaft fixed to the washing shaft to be engaged with the planetary gear part to drive the planetary gear part; A reverse rotation / deceleration means comprising a sun gear and a carrier rotatably supporting the planetary gear and installed outside the lower end of the washing shaft; A lower end of the clutch cover is provided with a driving unit case extending downward and surrounding the outer side of the reverse rotation / deceleration means; And a second one-way bearing (1way bearing) between the lower end of the driving unit case and the carrier to support the driving unit case so as to be rotatable in one direction.