KR950007077B1 - Washing machine clutch - Google Patents

Abstract

a first clutch located on the external surface of a drum assembly and having screws on the round-shaped lower side surface thereof and projections on the upper side surface; a second clutch whose both ends are connected to a pulley and the drum assembly, respectively, having an upper screw on its one end connected to the drum assembly; a third clutch for coupling or separating the first and the second clutches, forming a cylindrical rod so as to be connected to the clutch lever on the side surface thereof and a lower screw along to the edge thereof; and a fourth clutch partly cut-opened so as to insert one end part of the third clutch thereinto and having a lower screw connected to the lower screw of the third clutch at the inside edge thereof.

Description

Clutch device of automatic washing machine

1 is a partial cutaway view of a gear mechanism in which a conventional power transmission spring clutch is installed.

2 is a partial cutaway view of a gear mechanism provided with the power transmission clutch device of the present invention, which shows a state at the time of dehydration and a state at the time of washing.

3 is an exploded perspective view of the clutch device of the present invention.

4 and 5 show the coupling state of the clutch gear during washing and dehydration.

6 is a plan view of the clutch lever of the present invention.

* Explanation of symbols for main parts of the drawings

2: pulley 4: coupling

6: clutch spring 8: drum assembly

10: clutch boss 12: clutch team

14: clutch lever 20: pulley

22: first clutch 24: second clutch

26: third clutch 28: fourth clutch

30: first spring 32: second spring

34: clutch lever 36: lower case

221: upper portion 222: first clutch body

223: lower thread 224: involute separation hole

241: second clutch body 242: upper thread

243: involute serration hall 261: rod

262: third clutch body 263: lower thread

264: lower thread inclined portion 281: fourth clutch body

282: Insertion groove 283: Lower thread

284: lower thread mountain slope

[Field of Invention]

The present invention relates to a device for transmitting the rotational force generated from the electric motor to the washing tank of the washing machine.

More specifically, the present invention relates to a washing machine power transmission clutch device configured to perform power transmission using a plurality of clutches instead of a conventional power transmission spring. In particular, it relates to a clutch device of a fully automatic washing machine that does not require a reverse rotation prevention device.

[Background of invention]

A washing machine power transmission device used in the related art is a method of transmitting power generated by an electric motor by using a pulley. The drum assembly of the gear mechanism is coupled to the pulley by a coupling, and the drum assembly and the coupling are coupled to each other. It has a structure that a power transmission spring wraps around it.

The power transmission spring is in close contact or spaced apart from the drum assembly and the coupling by the movement of the clutch lever to transmit power.

1 is a gear mechanism which is a conventional washing machine power transmission device. When the pulley 2 is rotated by receiving power from an electric motor, the coupling 4 and the drum assembly 8 connected to the pulley 2 are rotated. Clutch spring (6) is installed to wrap around the periphery of the coupling and the coupling (4) and the drum assembly (8) in close contact to transmit the rotational force of the pulley (2).

This rotational force is transmitted to a pulsator (not shown) by a gear mechanism to rotate the washing water for washing.

However, when the power transmission spring using the winding and unwinding action for the conversion of washing and dehydration during the power transmission process, the following problems occurred.

First, the power transmission spring is relaxed by repeated loads of laundry and washing water due to continuous washing and dehydration, and accordingly, slip occurs during dehydration, and second, rust occurs in the power transmission spring, and thus the function of the clutch Third, friction noise is generated between the inner surface of the spring and the coupling during washing. Fourth, in the gear mechanism that uses the winding and unwinding of the clutch spring, the dehydration shaft reverses rotation during washing (in the opposite direction to dehydration). ), And the clutch spring inserted in the lower part of the dehydration shaft is wound so that the clutch boss connected to the clutch spring end ring is rotated, and the rotation of the clutch boss pushes the clutch tip to “click”. It generates noise and ultimately leads to a one-way restraint of the pulley, so a separate reverse rotation prevention device is needed to prevent reverse rotation of the dehydration shaft.

In particular, the insertion of a separate anti-rotation device complicated the structure of the gear mechanism and contributed to the cost increase. The present invention has been made to solve the above problems, the inventors have come to the present invention using a plurality of clutch gear directly connected to the pulley without using a power transmission spring.

[Purpose of invention]

An object of the present invention is to provide a clutch device of a fully automatic washing machine that can accurately perform the washing, dehydration conversion when using the washing machine.

Another object of the present invention is to provide a clutch device of a fully automatic washing machine that can prevent unnecessary contact friction generated when using a detailed washing machine.

It is a further object of the present invention to provide a clutch lock of a fully automatic washing machine which does not require a reverse rotation prevention mechanism which is essential when using a conventional power transmission spring.

Still another object of the present invention is to provide a clutch device of a fully automatic washing machine which can reduce cost by removing a separate reverse rotation preventing device.

[Summary of invention]

Clutch device of the automatic washing machine of the present invention for the above object is a first clutch coupled to the rotating shaft, a second clutch directly connected to the pulley, a third clutch for coupling or separating the first clutch and the second clutch, the first clutch The first clutch and the second spring for restoring the first clutch and the third clutch and the fourth clutch coupled to the lower case end of the gear mechanism by accommodating the three clutches. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[Description of Specific Example of the Invention]

The clutch device of the fully automatic washing machine of the present invention is coupled between the pulley and the drum assembly in the washing machine gear mechanism for converting the power of the electric motor into rotational force to solve the drawback of the spring clutch to switch the dehydration and washing by the winding and loosening action It is for.

In particular, the clutch device of the fully automatic washing machine of the present invention has one end connected directly to the pulley, and the other end is connected to the drum assembly, and the second clutch, which is geared to the side connected to the drum assembly, is installed to be movable up and down on the outer surface of the drum assembly. The lower surface of the circular thread is formed and the upper surface is for engaging or separating the first clutch, the second clutch and the second clutch of the shape projecting in the radial direction, on one side for coupling with the clutch lever An end portion of which forms a cylindrical rod, which is bent vertically downward, a threaded third clutch along the periphery of the edge, and a portion of which is cut through the end of the third clutch, and an inner edge of the third clutch A fourth clutch formed with a thread engaged with the thread of the first clutch, and an upper side of the first clutch And the lower the first spring and sapseol between the case and is composed of a second spring sapseol between the clutch upper side and the lower case.

In addition, the end shape of the clutch lever has a “U” shape with one end open so that the cylindrical rod bent downward of the third clutch is inserted. As the clutch lever moves to the left and right, the third clutch moves up and down. Accordingly, since the first clutch connected to the third clutch is also moved up and down, the first clutch and the second clutch are separated to block power transmission.

2 is a cutaway view of a gear mechanism provided with the clutch device of the automatic washing machine according to the present invention, where a is a coupling state of each clutch when dewatering, and b is a coupling state of each flush when washing. .

At the time of dehydration, the second clutch 24 directly connected to the pulley 20 and the first clutch 22 inserted into the rotation shaft are coupled to each other, and the third clutch 26 is connected to the first clutch 22 as shown in FIG. It is separated.

During washing, the third clutch 26 moves upward as shown in b, and thus the first clutch 22 engaged with the third clutch 26 moves to move the first clutch 22 and the second clutch 24. Is separated.

Dehydration and washing are performed by using the clutch lever 34 with a circular rod that is bent downward at the end of the third clutch 26. The clutch lever 34 is a “U” shaped end with an open clutch. It is installed to span the inside of the lever 34.

In addition, a first spring 30 and a second spring 32 are provided between the upper surface of the first clutch 22 and the third clutch 26 and the lower case 36, respectively, which are each clutch 22. , 26) to restore the clutch by applying an elastic force.

Detailed structures of the first, second, third and fourth clutches 22, 24, 26 and 28 will be described below with reference to FIG.

As shown, the first clutch 22 is a cylinder having a space formed therein, and the upper end portion 221 protrudes more than the first clutch body 222, and a lower thread 223 is formed at the lower end portion. In addition, the inner space has a shape of a radially protruding involute separation hole 224, which is coupled to an involute separation shaft formed in the drum assembly.

The second clutch 24 also has an involute separation hole 243 formed at the inner center thereof, and a plurality of upper screw threads 242 are formed at the upper portion of the cylindrical second clutch body 241. The upper screw thread 242 is coupled to the lower screw thread 223 of the first clutch 22. The diameter of the involute segmentation hole 243 is different from that of the involute segmentation hole 224 of the first clutch 22, and the involute segmentation hole 224 of the first clutch is larger in structure.

The third clutch 26 is a cylinder having a lower thread 263 formed at a lower end thereof, and has a rod 261 extending from the side of the third clutch body 262 at the upper end thereof without a protrusion such as the first clutch 22. . The rod 261 is extended and then bent downward by 90 ° and connected to the clutch lever. In addition, the lower surface of the upper end portion 221 of the first clutch 22 is installed to contact the upper surface of the third clutch body 262.

The fourth clutch 28 for accommodating the third clutch 26 has an insertion groove 282 formed in a portion of the upper end thereof, and a lower thread 283 is formed at the edge of the inner bottom of the fourth clutch body 281. Formed. The insertion groove 282 is formed such that the rod 261 of the third clutch 26 is rotatable by a predetermined angle.

4 is a diagram illustrating a state of engagement of the clutch during the washing stroke, and FIG. 4A shows the third clutch 26 and the fourth clutch 28 and FIG. 4B shows the first clutch 22 and the second clutch 24. ) Show the combined state of each.

5 is a diagram illustrating a state of engagement of the clutch during the dehydration stroke. FIG. 5A shows the third clutch 26 and the fourth clutch 28, and FIG. 5B shows the first clutch 22 and the second clutch ( The combined state of 24 is shown, respectively, and FIGS. 4 and 5a and b show the main parts in the respective figures.

The clutch lever for driving the clutch device of the automatic washing machine according to the present invention configured as described above has a structure in which a rod is inserted in the center thereof as an “U” shape having one end opened. Therefore, the rod is easily inserted and the washing and dehydration are switched as the clutch lever moves. Here, the shape of the clutch lever can be used as long as the rod can be moved left and right.

Referring to the operation and effect of the clutch device of the automatic washing machine of the present invention.

When the clutch device is in the dewatered state as shown in FIG. 2A, the third clutch 26 moves downward by the lower threaded slopes 264 and 284 due to the movement of the clutch lever so that the first clutch 22 moves downward. And coupled to the second clutch 24. Therefore, when the second clutch 24 is rotated, the first clutch 22 is also rotated, and the dehydration shaft engaged by the first clutch 22 and the involute separation is rotated, thereby dehydration.

In addition, when the clutch device is in the washing state as shown in FIG. 2B, the clutch lever 34 moves so that the third clutch 26 moves upward through the lower threaded slopes 264 and 284 to raise the first clutch 22 upward. Move it. Therefore, since the first clutch 22 and the second clutch 24 are separated so that the first clutch 22 does not transmit power even when the second clutch 24 rotates, the washing shaft inside the pulley and the drum assembly. Rotate the pulsator and wash it.

Therefore, instead of the conventional power transmission spring, the first clutch coupled to the rotation shaft, the second clutch directly connected to the pulley, the third clutch for coupling or separating the first clutch and the second clutch, the third clutch to receive By using a plurality of clutch devices composed of a fourth clutch coupled to the lower case end of the gear mechanism, it is possible to perform washing and dewatering conversion accurately when the washing machine is used, and to prevent unnecessary contact friction generated when the washing machine is used, It is possible to provide a washing machine clutch device that does not require an anti-rotation mechanism essential when using a transmission spring.

Although the present invention has been described in detail only with respect to the embodiments described above, various modifications or changes are possible within the spirit and scope of the present invention, and such changes or modifications should be limited by the appended claims.

Claims (6)

In the gear mechanism of the washing machine for transmitting the rotational force of the electric motor, the first clutch 22 is formed on the outer surface of the drum assembly, the thread is formed on the circular lower surface and the upper surface protrudes in the radial direction; A second clutch 24 having one end connected directly to the pulley 20 and the other end connected to the drum assembly and having an upper thread 242 formed at a side connected to the drum assembly; As for coupling or separating the first clutch 22 and the second clutch 24, on one side to form a cylindrical rod 261, the end of which is bent vertically downward to engage with the clutch lever, A third clutch 26 having a lower thread 263 formed around the edge thereof; And a fourth clutch 28 having a portion cut through the end of the third clutch and having a lower thread 283 coupled to a lower thread 263 of the third clutch 26 at an inner edge thereof. Clutch device of a fully automatic washing machine comprising a. The clutch device of claim 1, wherein the first clutch (22) is coupled to an involute separation shaft of the drum assembly. The clutch device of a fully automatic washing machine according to claim 2, wherein a space is formed in the first clutch (22) to move up and down along the involute separation axis of the drum assembly. The clutch device of claim 1, wherein a first spring (30) is inserted between an upper side surface of the first clutch (22) and the lower case (36). The clutch device according to claim 1, wherein a second spring (32) is inserted between the upper side of the third clutch (26) and the lower case. 2. The clutch device according to claim 1, wherein an end portion of the clutch lever (34) for controlling the rod (261) of the third clutch (26) is “U” shaped.