KR20000001804U - 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.

The present invention is installed so that the pulsator is rotatable at the bottom of the washing tank, the direct drive motor has a first and second drive shaft for rotating the pulsator and the washing tank in accordance with the washing and dehydration stroke. An electromagnet is provided on the lower surface of the reservoir, a fixing block having teeth is provided on the lower surface of the electromagnet, a guide is provided on the outer circumferential surface of the second drive shaft, and a groove is formed on the outer surface of the guide. The movable block is installed to move by the magnetic field of the electromagnet, the upper surface of the movable block is formed with the teeth engaging with the teeth of the fixed block, the inner surface of the movable block is formed with a projection to be movable to the groove. Therefore, since the fixed block and the movable block cooperate with each other by the magnetic field of the electromagnet, a simple configuration is performed to control the driving force of the direct drive motor. 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 clutch device of a washing machine in which the intermittent position is accurate and the occurrence 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;

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

Figure 4 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: fixed block

42: tooth 50: guide

52: home 54: stopper

60: movable block 62: teeth

66: turning

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 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 disposed on a lower surface of a reservoir to form a magnetic field upon application of power; A fixed block provided on a lower surface of the electromagnet and having a plurality of teeth formed thereon; A guide provided on an outer circumferential surface of the second drive shaft, the groove having an outer surface formed along the axial direction, and a stopper formed on the lower portion of the groove; In a clutch device of a washing machine, a tooth is formed on an upper surface thereof so as to be engaged by a magnetic field of an electromagnet and engaged in a corresponding relationship with a tooth of a fixed block, and an inner block is formed of a movable block having protrusions formed to be movable in a groove.

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 4 is a view showing for explaining the clutch device of the washing machine according to the present invention.

As shown in Figure 1 and 2, the water reservoir 10 is stored in the interior of the cabinet (not shown), the washing tank 12 is rotatably installed in the interior of the reservoir 10, washing tank 12 A plurality of holes 14 connected to the water tank 10 are formed on the outer circumferential surface of the), 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 tank 12 is assembled to the second drive shaft 24. 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 and 3, the lower portion of the water storage tank 10 is provided with a clutch device for intermittent rotation of the washing tank 12. The clutch device is provided with an electromagnet 30 that forms a magnetic field in response to the application of power to the lower surface of the reservoir 10, and a fixed block 40 made of an annular shape is mounted on the lower surface of the electromagnet 30, and the fixed block 40 ), A plurality of teeth 42 are formed radially on the lower surface, and a substantially triangular guide surface 44 is formed on the lower portion of the teeth 42.

In addition, an annular guide 50 is provided on the outer circumferential surface of the second drive shaft 22, one or more grooves 52 are formed along the axial direction on the outer surface of the guide 50, and a stopper is provided below the groove 52. 54 is formed. That is, the groove 52 is formed so that the upper side and the side open, and the lower side is formed so as to be blocked by the stopper 54. Although the figure shows that the two grooves 52 are formed at positions corresponding to each other, the number and position of the grooves 52 can be appropriately changed. For example, when four grooves 52 are formed, it is preferable to form them at equal intervals.

On the other hand, the movable block 60 made of an annular magnetic metal is formed in the lower portion of the fixed block 40 to enable vertical movement by the formation of a magnetic field. A plurality of teeth 62 are formed on the upper surface of the movable block 60 to engage with the teeth 42 of the fixing block 40 in a corresponding relationship, and the guide surface of the fixing block 40 is formed above the teeth 62. A substantially triangular guide surface 64 is formed so as to abut corresponding to each other with (44) so as to facilitate engagement of the teeth 42 and 62. A protrusion 68 is formed on an inner surface of the movable block 60 so as to slide in a groove 52 of the guide 50 corresponding to each other, and the protrusion 68 is a stopper 54 of the guide 50. ), The moving distance of the movable block 60 is regulated. That is, when the projection 68 is caught by the stopper 54, the movable block 60 is not moved downwards, and thus the distance between the fixed block 40 and the movable block 60 is kept constant.

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

As shown in FIG. 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, power is applied to the electromagnet 30 to form a magnetic field. The movable block 60 is moved upward by the magnetic field of the electromagnet 30. At this time, the projection 66 of the movable block 60 is slid along the groove 52 of the guide 50. At the same time, the guide surface 64 of the movable block 60 abuts against the guide surface 44 of the fixed block 40 in correspondence with each other, whereby the teeth 42 and the movable block 60 of the fixed block 40 are contacted. Teeth 62 are engaged in a corresponding relationship with each other.

When the teeth 42 of the fixed block 40 and the teeth 62 of the movable block 60 are engaged with each other, the rotation of the second drive shaft 24 becomes impossible, and the washing tank 12 maintains the stopped state. When the first drive shaft 22 is rotated by the direct drive motor 20, the pulsator 16 is rotated together with the first drive shaft 22 to generate water to perform the washing process of the laundry. .

As shown in Fig. 4, when the user sets the dehydration stroke, the power applied to the electromagnet 30 is cut off, which causes the movable block 60 to move downward by its own weight. At this time, the power can be cut off by a controller (not shown), and the controller can be configured by a general microcomputer.

On the other hand, as the movable block 60 is moved downward, the projection 66 of the movable block 60 is caught by the stopper 54 of the guide 50, and a predetermined interval between the fixed block 40 and the movable block 60 is established. This is kept constant. That is, in the state where power is not applied to the electromagnet 30, the movable block 60 will be separated from the fixed block 40, and the teeth 42 and 62 will not be engaged. Accordingly, the second drive shaft 24 and the washing tank 12 are rotated together, and the water in the washing tank 12 and the water wet to the laundry are discharged through the holes 14 by the centrifugal force by the rotation of the washing tank 12. Dewatering stroke is carried out while falling to 10, the water in the reservoir 10 is drained to the outside through a drain not shown.

As such, the present invention is configured to control the driving force of the direct drive motor 20 by cooperating with the fixed block 40 while the movable block 60 is moved up and down by the electromagnet 30, so that the configuration is simple and assemblability is achieved. Is improved. In addition, the number of assembly parts is reduced, which reduces production costs.

In addition, since the teeth 42 of the fixed block 40 and the teeth 62 of the movable block 60 mesh with each other to regulate the rotation of the second drive shaft 24, the interruption position is accurately maintained to prevent malfunction. Overload of the drive motor 20 is prevented. In addition, the impact sound due to the engagement of the teeth 42, 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 fixed block and the movable block cooperate with each other by the magnetic field of the electromagnet, a simple configuration is performed to control the driving force of the direct drive motor. As a result, the number of assembly parts is reduced, which reduces 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; A fixed block 40 installed on a lower surface of the electromagnet 30 and having a plurality of teeth 42 formed on the lower surface thereof; A guide (50) installed on an outer circumferential surface of the second drive shaft (22) and having a groove (52) formed along the axial direction on the outer surface thereof, and a stopper (54) formed below the groove (52); A tooth 62 is formed on an upper surface thereof so as to be moved by a magnetic field of the electromagnet 30 and to engage in a corresponding relationship with the teeth 42 of the fixing block 40, and an inner surface thereof is movable to the groove 52. Clutch device of the washing machine consisting of a movable block 60 is formed with a projection (66) to be fitted. The washing machine according to claim 1, wherein the teeth (42, 62) of each of the fixed block (40) and the movable block (60) are formed with triangular guide surfaces (54, 64) to guide the engagement of the teeth (42, 62). Clutch device.