KR20000007674U - Clutch device of washing machine - Google Patents

Abstract

The present invention relates to a clutch device of a washing machine. Conventionally, the clutch device of a washing machine has a problem in that the configuration of the lever and the ratchet operated by the drive of the actuator is complicated, and the number of assembly parts is large. In addition, the intermittent position is not accurate and the impact sound is greatly generated.

According to the present invention, a pulsator is installed at the bottom of the washing tank, and the direct drive motor has first and second driving shafts for rotating the pulsator and the washing tank according to the washing and dewatering strokes. An electromagnet that forms a magnetic field in response to the application of power is installed on the lower surface of the water storage tank, and a magnet is installed on the lower surface of the washing tank so that the washing tank can be lifted by receiving reaction force by the magnetic field of the electromagnet. A first block having teeth is mounted on the bottom of the reservoir, and a second block having teeth is mounted on the lower surface of the pulsator so as to engage in a corresponding relationship with the teeth of the first block as the washing tank is lifted and lowered. Therefore, since the first and second blocks cooperate with each other by the magnetic field of the electromagnet, the simple configuration of controlling the driving force of the direct drive motor is not only improved, but also the number of assembly parts is reduced, thereby reducing the production cost. In addition, the intermittent position is accurate to prevent malfunction and overload, and the impact sound is minimized to improve reliability.

Description

Clutch device of washing machine

The present invention relates to a washing machine, and more particularly to a clutch device of a washing machine for controlling the rotation of the pulsator and the washing tank.

In general, a washing machine is a device that automatically performs a series of washing, rinsing, and dehydration by putting laundry, water, and an appropriate amount of detergent in a washing tank, and giving the laundry a shock caused by a mechanical flow of water. to be.

Looking at the example of such a washing machine, the inside of the cabinet is installed in the reservoir, the washing tank having a plurality of holes in the inside of the reservoir is installed to be rotatable, the bottom of the washing tank is rotated by the driving force of the drive means to generate a water pulse Data or agitators are installed. Therefore, when the water is stored in the reservoir, the laundry and the detergent are put in the washing tank, and the washing function is set, the washing stroke is performed by the rotation of the pulsator, and when the washing tank is rotated by the driving force of the driving means, the dewatering stroke This is done.

On the other hand, as a driving means for rotating the washing machine pulsator and the washing tank there is a direct drive motor (combination of a motor, a reduction gear consisting of a plurality of planetary gear and ring gear). The direct drive motor is configured such that the first drive shaft for rotating the pulsator and the second drive shaft for rotating the washing tub are concentric, and the direct drive motor rotates the first and second drive shafts at a desired rotational speed by the reduction gear. In addition, the direct drive motor is provided with a clutch device for intermittent rotation of the first and second drive shafts, the clutch device intermittent rotation of the second drive shaft by operation of the actuator and the lever. It consists of a ratchet.

However, the clutch device of the conventional washing machine as described above is assembled so that the lever and the ratchet are rotated about the pins, and springs are provided to give elastic force to allow the lever and the ratchet to be returned. There was a problem. In addition, there is a problem that the production cost is increased by increasing the number of assembly parts.

In addition, since the ratchet must interrupt the rotation of the second drive shaft at the correct position, a sensor for controlling the intermittent position of the ratchet and a circuit related thereto are required. However, when the second drive shaft is rotated by the inertial force and does not stop at the correct intermittent position, and the intermittent position is out of the intermittent position, the intermittent position of the ratchet sensed by the sensor is changed to cause an interruption in the interruption of the second drive shaft. If the second drive shaft is not interrupted correctly, a malfunction may occur, and an overload may occur in the direct drive motor, causing a problem. In addition, since the lever and the ratchet are given the elastic force of the spring there is a problem that the impact sound is generated when they are operated to lower the reliability.

The present invention is devised to solve the conventional problems as described above, the object of the present invention is to interrupt the driving force by a simple configuration to improve the assemblability, to reduce the number of assembly parts to reduce the production cost It is to provide a clutch device of a washing machine.

Another object of the present invention is to provide a driving device of the washing machine, the intermittent position is accurate, and the generation of impact sound is reduced.

1 is a cross-sectional view showing a clutch device of a washing machine according to the present invention,

2 is a perspective view partially showing a clutch device of a washing machine according to the present invention;

Figure 3a and Figure 3b is a cross-sectional view showing an operating state for the clutch device of the washing machine according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

10: reservoir 12: washing tank

16: pulsator 20: direct drive motor

22: first drive shaft 24: second drive shaft

30: electromagnet 40: magnet

50: first block 52: cogs

54: guide surface 60: second block

62: tooth 64: guide surface

Features of the present invention for achieving the above object, the washing tank is installed to be rotatable inside the reservoir, the pulsator is installed to be rotatable on the bottom of the washing tank, the pulsator and the washing tank in accordance with the washing and dewatering stroke CLAIMS 1. A washing machine having a direct drive motor having a first and a second drive shaft for selectively rotating, the washing machine comprising: an electromagnet mounted on a lower surface of a water storage tank to form a magnetic field upon application of power during a dehydration stroke; A magnet installed on the lower surface of the washing tank to receive the reaction force by the magnetic field of the electromagnet and to lift the washing tank; A first block mounted to the bottom of the reservoir and having a plurality of teeth radially formed on an upper surface thereof; A clutch device of a washing machine, which is mounted on a lower surface of a pulsator and which has teeth formed on the lower surface of the pulsator so as to engage with the teeth of the first block in accordance with the lifting and lowering of the washing tank.

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

1 to 3a and 3b is a view showing to explain the clutch device of the washing machine according to the present invention.

As shown in FIG. 1, the water storage tank 10 in which water is stored is installed inside a cabinet (not shown), and the washing tank 12 is rotatably installed inside the storage tank 10, and an outer circumferential surface of the washing tank 12 is provided. A plurality of holes 14 connected to the reservoir 10 are formed in the bottom, and the pulsator 16 is rotatably installed at the bottom of the washing tank 12.

On the other hand, the lower portion of the reservoir 10 is provided with a direct drive motor 20 that can selectively rotate the washing tank 12 and the pulsator 16. The direct drive motor 20 has concentric first and second drive shafts 22, 24, and the first drive shaft 22 is configured to be wrapped by the second drive shaft 24. The pulsator 16 is assembled to the first drive shaft 22 of the direct drive motor 20, and the washing tub 12 is assembled to the second drive shaft 24, wherein the washing tub 12 is the second driving shaft 24. Along the upper and lower movements are assembled as possible. The direct drive motor 20 outputs a driving force by a combination of gears (not shown) to rotate the washing tub 12 and the pulsator 16 at a desired rotational speed.

As shown in FIG. 2, FIG. 3A, and FIG. 3B, the lower part of the water storage tank 10 is provided with the clutch apparatus which controls the rotation of the washing tank 12. FIG. The clutch device has an electromagnet 30 which forms a magnetic field in accordance with the application of power during the dehydration stroke is installed on the lower surface of the reservoir 10, in which the application and disconnection of the power is performed by the control of a control unit (not shown). It can be configured as a general microcomputer. The magnet 40 is installed on the lower surface of the washing tank 14 to receive a reaction force by the magnetic field of the electromagnet 30.

In addition, an annular first block 50 is mounted on the bottom of the reservoir 10, and a plurality of teeth 52 are radially formed on an upper surface of the first block 50, and a lower portion of the tooth 52 is disposed below. An approximately triangular guide surface 54 is formed. The lower surface of the pulsator 16 is mounted with an annular second block 60, and a plurality of upper surfaces of the first block 60 to engage with the teeth 52 of the first block 50 in a corresponding relationship. Teeth 62 are radially formed, and the lower part of the teeth 62 is in contact with the guide surface 54 of the first block 50 in a corresponding relationship to each other so that the teeth 52 and 62 are smoothly engaged. The triangular guide surface 54 is formed.

Referring to the operating state of the clutch device of the washing machine according to the present invention as described above are as follows.

1 and 2, when the user stores water in the water storage tank 10, puts laundry and detergent into the washing tank 12, and sets the washing function, the driving force of the direct drive motor 20 As a result, the first drive shaft 22 and the pulsator 16 are rotated together to generate water current to perform the washing stroke.

As shown in FIGS. 3A and 3B, when a dehydration stroke is performed, power is applied to the electromagnet 30 to form a magnetic field, and the magnet 40 is inflicted by the magnetic field of the electromagnet 30 to rise. Thus, the washing tank 12 is elevated along the second drive shaft 24.

Then, as the washing tank 12 is raised, the guide surface 54 of the first block 50 abuts on the guide surface 64 of the second block 60 in a corresponding relationship to each other, whereby the first block 50 The teeth 52 and the teeth 62 of the second block 60 are engaged with each other in a corresponding relationship.

When the teeth 52 of the first block 50 and the teeth 62 of the second block 60 are engaged with each other, the rotation of the pulsator 16 becomes impossible. In this state, the second drive shaft 24 and the washing tub 12 are rotated together by the driving force of the direct drive motor 20, and the water in the washing tub 12 and the water wet to the laundry are rotated by the washing tub 12. Falling into the reservoir 10 through the holes 14, the water of the reservoir 10 is drained to the outside through a drain not shown is carried out dehydration stroke.

On the other hand, when the dehydration stroke is terminated, the power applied to the electromagnet 30 is cut off, whereby the washing tank 12 is lowered along the second drive shaft 24 by its own weight, so that the first and second blocks 50 and 60 are reduced. ), The teeth 52 and 62 are not engaged.

As such, the present invention is configured such that the washing tank 12 is moved up and down by the electromagnet 30 so that the first and second blocks 50 and 60 cooperate with each other to control the driving force of the direct drive motor 20. And assembly property is improved. In addition, the number of assembly parts is reduced, which reduces production costs.

In addition, since the teeth 52 of the first block 50 and the teeth 62 of the second block 60 are engaged with each other, the rotation of the pulsator 16 is regulated, so that the intermittent position is accurately maintained to prevent malfunction. Overload of the direct drive motor 20 is prevented. In addition, the impact sound due to the engagement of the teeth 52, 62 is minimized to improve the reliability.

The above-described embodiments are merely illustrative of preferred embodiments of the present invention, and the scope of application of the present invention is not limited thereto, and may be appropriately changed within the scope of the same idea. For example, the shape and structure of each component specifically shown in the embodiment of the present invention can be modified.

As described above, according to the clutch device of the washing machine according to the present invention, since the first and second blocks cooperate with each other by the magnetic field of the electromagnet, the simple driving force to control the driving force of the direct drive motor is improved. Rather, the number of assembly parts is reduced, thereby reducing production costs. In addition, the intermittent position is accurate to prevent malfunction and overload, and the impact sound is minimized to improve reliability.

Claims (2)

A washing tank rotatably installed in the reservoir, a pulsator installed rotatably at the bottom of the washing tank, and first and second drive shafts for selectively rotating the pulsator and the washing tank in accordance with washing and dewatering strokes. In the washing machine provided with the direct drive motor which has, An electromagnet 30 installed at a lower surface of the reservoir 10 to form a magnetic field according to the application of power during a dehydration stroke; A magnet 40 installed on the lower surface of the washing tub 14 to receive the reaction force by the magnetic field of the electromagnet 30 so as to lift the washing tub 14; A first block (50) mounted on a bottom of the reservoir (10) and having a plurality of teeth (52) radially formed on an upper surface thereof; The tooth 62 is mounted on the lower surface of the pulsator 16 and the tooth 62 is formed to engage with the tooth 52 of the first block 50 as the washing tank 14 moves up and down. Clutch device for a washing machine consisting of two blocks (60). The teeth 52 and 62 of each of the first block 50 and the second block 50 are formed with triangular guide surfaces 54 and 64 to guide the engagement of the teeth 52 and 62. Clutch device of washing machine being.