KR100438291B1 - Washing machine with floatage clutch - Google Patents

Abstract

The washing machine according to the present invention includes a water storage tank, a washing tank, a pulsator, a direct drive motor providing power for rotational operation of the washing tank and the pulsator, a transmission for transmitting the power of the motor to the washing tank and the pulsator, The serration is coupled to the washing shaft to move up and down, and includes a buoyancy clutch for selectively interlocking the washing tank and the pulsator by intermittent depending on the presence or absence of the washing water, wherein the buoyancy clutch is serration-coupled with the washing shaft, and the lower surface is uneven. A float having a hub portion having a toothed structure having a shape and a hollow tube portion surrounding the hub portion and extending in a lower vertical axis direction; The upper surface is configured to further include a fixing member such that the upper surface has a concave-convex coupling structure to be engaged with the lower surface of the hub portion of the float.

According to the washing machine according to the present invention configured as described above, it is possible to easily change the power transmission at the time of switching between the washing stroke and the dehydrating stroke by using the buoyancy clutch of a simple structure, and by controlling the rotation direction of the pulsator and the washing tank in various forms. Washing is possible, and the operation efficiency is also improved due to the characteristics of the motor.

Description

Washing machine with floatage clutch

The present invention relates to a washing machine, and more particularly, to a washing machine provided with a buoyancy clutch for performing a power interruption during washing and dewatering by buoyancy, and driven by a direct drive motor.

In general, a washing machine is mainly for washing clothes by a mechanical operation through an electric motor. The washing machine includes a washing part performing a washing operation and a driving part driving a washing part, and agitator according to the washing method of the washing part. type), drum type and pulsator type.

Among them, the washing unit of the spiral wound washing machine, as shown in FIG. 1, has a reservoir 12 installed in the case 10, a washing tank 14 rotatably built in the reservoir 12, and water flow from the bottom of the washing tank 14. It consists of a pulsator 16 and the water supply and drain valve 17, 18 to form, the washing tank 14 is configured in the form having a plurality of dehydration holes (14a) on the wall.

The driving unit 20 receives the driving force of the driving motor 20 and the driving motor 20, and the transmission 30 and the clutch mechanism 40 to rotate the pulsator 16 and the washing tank 14, and the driving motor ( Belt connection means for transmitting the driving force of the 20 to the clutch mechanism 40, and brake means for maintaining a stable fixed state of the transmission (30).

The transmission 30 includes a gearbox 32 and upper and lower spiral windings 33 and 34 connected to each other through gear means (see FIG. 4) in the gearbox 32 as shown in FIG. 2. , A spin shaft 35 fixedly mounted to the gearbox 32, wherein the upper spiral winding shaft 33 is rotatably embedded in the spin shaft 35 and connected to the pulsator 16. The spin shaft 35 is fixedly mounted to the gearbox 32 and connected to the washing tub 14, and the lower spiral winding shaft 34 has a serration portion 341 (see FIG. 3) formed at a lower end thereof. As a structure, it protrudes below the gearbox 32. As shown in FIG.

The clutch mechanism 40 is mounted on one side of the spin shaft block 42 and the spin shaft block 42 fixedly attached to the lower end of the gearbox 32, as shown in FIG. A spring block 46 coupled to the portion 341 and fixed to the pulley 44 of the belt connecting means, and a one-way spring 48 mounted to surround the spin shaft block 42 and the spring block 46. ) Here, the one-way spring 48 has a mechanical characteristic that the tightening / loosening state is controlled according to the rotation direction.

Then, the gear means configured in the gearbox 32 of the transmission 30 is engaged with the pinion gear 50 and the pinion gear 50 attached to the lower end of the upper spiral winding 33 as shown in FIG. An eccentric crank 52 having a rack gear part 521 formed thereon, a first gear 54 connected to the same rotation axis as the eccentric crank 52, and a lower spiral winding shaft 34 engaged with the first gear 54. It consists of a second gear 56 attached to the top of the).

The brake means includes a brake disc 60 provided at the lower end of the gearbox 32, a brake friction portion 62 formed on the upper surface of the frame 19 of the suspension means in a form corresponding to the brake disc 60, and a drive motor. It comprises a position adjusting mechanism (not shown) for controlling the separation / close state of the brake disc 60 and the brake friction portion 62 by adjusting the gear box 32 in the vertical direction according to the operating direction of the (20). (See Figure 1)

The washing process by the spiral winding type washing machine configured as described above includes a water supply stroke in which the washing water is supplied into the washing tank 14 by the water supply valve 17, and the washing water and the feeling of washing by rotating the pulsator 16 after the water supply stroke is finished. Washing cycle that rotates for a certain time, and after the wash stroke drains the wash water through the drain valve 18, and then rinse stroke to rinse the laundry by a predetermined number of times by supplying clear water, that is, rinsing water containing no detergent, and rinsing After the stroke is completed, the washing tank 14 is rotated at a high speed to dehydrate the laundry.

In such a control method, in the water supply stroke, the water flowing through the water supply valve 17 passes through the detergent container, and the washing water mixed with the detergent is supplied. In the washing stroke, the pulsator (with the chemical action of the detergent contained in the washing water) 16) a washing action is performed in which the contaminants attached to the clothes are removed by the physical action by the physical action, wherein the pulsator 16 repeats the normal and reverse rotation in which the rotation direction is intermittently reversed by the transmission 30. A washing action is achieved by forming a bidirectional water flow combining a left and right water flow and a vertical water flow.

Subsequently, in the ongoing rinsing stroke, the detergent component in the laundry is removed by bidirectional water flow generated by the rotational operation of the pulsator 16 as in the washing stroke in the state where the rinsing water is not mixed with the detergent. In the stroke, after the rinsing water is drained, the washing tub 14 is rapidly rotated in one direction, so that the water of the laundry is centrifugal by the centrifugal force while the laundry is in close contact with the inner wall of the washing tub 14.

In the dehydration stroke, the washing tank 14 and the pulsator 16 are rotated in the same direction at the same time to prevent the clothes from being damaged by the pulsator 16, and the drain valve 18 is opened to dehydrate the washing tank 14. The water discharged through the ball 14a is drained to the outside of the washing machine.

On the other hand, the rotation operation of the washing tank 14 and the pulsator 16 in each stroke is made by the drive unit as described above, the operation of the drive unit in detail as follows.

First, in the washing stroke, the pulley 44 is rotated in one direction (clockwise) by the rotation operation of the drive motor 20, the spring block 46 and the spring block 46 connected to the pulley 44. And the lower serration shaft 34 coupled to the serration rotates. At this time, the one-way spring 48 is in an unlocked state, and the brake disc 60 and the brake friction part 62 remain in close contact with each other. The box 32 is in a non-moving state. As the lower spiral winding 34 rotates, the second gear 56 in the gearbox 32 and the first gear 54 meshed with the second gear 56 rotate, and the first gear ( Eccentric crank 52 connected to the same axis of rotation as 54) is activated.

At this time, the eccentric crank 52 is a linear reciprocating motion around the axis of rotation of the structure, and accordingly the upper spiral winding shaft (50) by the pinion gear 50 engaged with the rack gear portion 521 of the eccentric crank (52) As a result of the rotary reciprocating movement 33, the forward and reverse rotation of the pulsator 16 is consequently achieved.

And, in the dehydration stroke, the rotational operation of the drive motor 20 is made in the opposite direction (counterclockwise) as in the washing stroke, and is connected with the spring block 46 and the spring block 46 connected to the pulley 44. The lower coupled spiral shaft 34 is also rotated counterclockwise. At this time, the spring block 46 and the spin shaft block 42 are coupled by tightening the one-way spring 48, In operation, the brake disc 60 and the brake friction portion 62 are separated. Accordingly, the gearbox 32 and the spin shaft 35 rotate together with the spin shaft block 42, and the upper spiral winding shaft 33 also rotates in the same direction, so that the washing tank 14 and the pulsator 16 are rotated. It rotates together to perform dehydration.

According to the conventional spiral winding washing machine, since the pulsator 16 is reversely rotated in the washing stroke, a complex water flow is formed, so that the washing effect is relatively high, and the switching from the washing stroke to the dehydrating stroke is changed in the operation direction of the driving motor 20. And it is characterized in that automatically made by the linkage structure of the transmission 30 and the clutch mechanism (40).

However, according to the prior art as described above, since the structure of the transmission 30 and the clutch mechanism 40 for transmitting the power of the drive motor 20 to the pulsator 16 and the washing tank 14 is complicated, Since the productivity is lowered and the washing operation is performed only through the simple reverse rotation operation of the pulsator 16, there is a problem that the commerciality of the washing machine is lowered because various washing operations suitable for the characteristics of the laundry cannot be achieved.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a washing machine including a buoyancy clutch that can smoothly change the power transmission state during the switching between the washing and dehydrating stroke using buoyancy.

1 is a cross-sectional view showing the structure of a conventional washing machine.

2 is a perspective view showing a transmission structure of a conventional washing machine.

3 is an exploded perspective view showing the configuration of a clutch mechanism of a conventional washing machine.

Figure 4 is a perspective view showing the configuration of the gear means applied to the transmission of the conventional washing machine.

5 is a cutaway perspective view showing the main structure of the washing machine according to an embodiment of the present invention.

6 is a perspective view showing the configuration of a buoyancy clutch applied to a washing machine according to an embodiment of the present invention.

7 a and b is a state diagram showing the operation of the buoyancy clutch applied to the embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

12: reservoir 14: washing tank

16: pulsator 22: drive motor

221: stator 222: rotor

70: transmission 72: hollow deshrink

74: washing shaft 76: bearing

80: buoyancy clutch 82: float

821: hub portion 822: tube portion

83: fixing member

Washing machine provided to achieve the above object is a water tank, a washing tank, a pulsator, a direct drive motor for providing power for the rotation operation of the washing tank and the pulsator, and transmitting the power of the motor to the washing tank and the pulsator A serration coupled to the transmission and the washing shaft to move up and down is intermittent according to the presence or absence of the wash water, and includes a buoyancy clutch for selectively interlocking the washing tank and the pulsator, wherein the buoyancy clutch is coupled to the washing shaft and serration, A float comprising a hub having a lower surface having a concave-convex engagement structure, and a hollow tube extending around the hub and extending in a lower vertical axis direction; And a fixing member having an upper surface having a concave-convex coupling structure to be engaged with the lower surface of the hub portion of the float. The direct drive motor includes a stator for rotatably supporting a washing shaft of a transmission, and a periphery of the stator. The transmission comprises a rotor coupled to the front end of the washing shaft. The transmission includes a hollow dehydration shaft fixedly connected to the washing tank, and is mounted through the hollow dehydration shaft, and the upper end is fixedly connected to the pulsator, and the lower end thereof is It includes a washing shaft connected to the motor, and a plurality of bearings for supporting the dehydration shaft, one of the bearings is made of a one-way type so that the rotation of the dehydration side is possible in only one direction.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 5 to 7, and the same reference numerals are assigned to the same parts as the prior art configurations of the present invention.

First, the washing machine according to the embodiment of the present invention, as shown in Figure 5, the reservoir 12, the washing tank 14 rotatably embedded in the reservoir 12, and the washing tank 14 is mounted to form a water flow The pulsator 16, the direct drive motor 22 which provides power, the transmission 70 which transmits the power of the said motor 22 to the washing tank 14 and the pulsator 16, and the presence or absence of wash water By intermittent according to the buoyancy clutch 80 to selectively interlock the washing tank 14 and the pulsator 16 is made.

The transmission 70 is mounted through the hollow dewatering shaft 72 fixedly connected to the bottom surface of the washing tank 14, the hollow dewatering shaft 72 and the upper end is fixedly connected to the pulsator 16, the lower end is The washing shaft 74 is connected to the motor 22 and a plurality of bearings 76 supporting the hollow dewatering shaft 72.

The direct drive motor 22 is a so-called outer rotor type that includes a stator 221 rotatably supporting the washing shaft 74 of the transmission 70 and a form surrounding the stator 221 so as to surround the washing shaft ( 74) a rotor 222 coupled to the tip.

And, the buoyancy clutch 80 is fixed to the float 82 and the hollow dewatering shaft 72 is coupled to the laundry shaft 74 to move up and down, as shown in Figure 6 below the float 82 It consists of a fixing member 83 which is separated from the float 82.

The float 82 is composed of a hub portion 821 coupled to the washing shaft 74 and serrations, and a tube portion 822 formed around the hub portion 821, and the bottom portion of the hub portion 821 is uneven. It is made of a toothed structure of the shape, the tube portion 822 is made of a closed hollow structure.

The fixing member 83 is formed in an uneven shape so that the top surface is engaged with the bottom surface of the hub portion 821 of the float 82. At this time, as shown in FIG. 7, the tube portion coupled to the outer surface of the hub portion 821 ( 822 is formed to extend in the vertical axis direction so that the engaging portion of the float 82 and the fixing member 83 is not exposed to the outside, washing water is introduced into the engaging portion to prevent foreign substances from being caught.

Referring to the operation of the washing machine configured as described above are as follows.

First, when the water supply stroke starts and the washing water is supplied into the washing tank 14, as shown in a of FIG. 7, the float 82 floats up and is separated from the fixing member 83 so that the buoyancy clutch 80 is a so-called power cutoff state. By being the power of the motor 22 is transmitted only to the wash shaft.

Therefore, when the washing stroke starts and the direct drive motor 22 rotates, the pulsator 16 connected to the washing shaft 74 rotates, and the pulse 22 is repeatedly pulsed by repeating the reverse rotation of the motor 22 intermittently. The data 16 also performs the same forward and reverse rotation operation.

In addition, according to the rotation operation of the pulsator 16, a rotational flow is formed. When the pulsator 16 is continuously rotated in one direction for a predetermined time or more, the washing tank 14 also flows in the same direction as the pulsator 16. The washing water is discharged out of the washing tank 14 by the centrifugal force by rotating the washing machine, and the centrifugal washing (so-called waterfall washing) in which the discharged washing water flows back into the washing tank 14 through the flow path between the washing tank 14 and the water storage tank 12 is also discharged. It becomes possible.

After the washing stroke is finished and after the rinsing stroke, the dehydration stroke is performed. Before the dehydrating stroke starts, the rinsing water used for the rinsing is drained, and as shown in FIG. When the float 82 and the fixing member 83 come into contact with each other, the buoyancy clutch 80 is switched to the power transmission state.

In this state, when the washing shaft 74 is rotated by the motor 22, the float 82 coupled with the washing shaft 74 rotates, and is engaged with the hub portion 821 of the float 82. The fixing member 83 and the washing tub 14 connected to the fixing member 83 also rotate together with the washing shaft 74 in the same direction.

Therefore, the washing tank 14 is rapidly rotated in one direction, so that the water is drained through the dehydration hole 14a by centrifugal force while the clothes are in close contact with the inner wall of the washing tank 14. As described above, the washing tank 14 and the pulsator 16 are simultaneously rotated in the same direction, thereby preventing the clothes from being caught by the pulsator 16 and being damaged.

Next, according to another embodiment of the present invention, one of the bearings 76 supporting the dehydration shaft 72 is of a one-way type, and accordingly, the dehydration shaft 72 rotates only on one side. It becomes possible state.

According to another embodiment of the present invention, when the washing tank 14 rotates in the same direction as the pulsator 16 during the forward rotation of the pulsator 16 in the washing stroke, the washing tank during the reverse rotation of the pulsator 16 Since the 14 does not move, the rotational operation direction of the motor 22 is controlled to selectively wash the pulsator using only the pulsator 16 or centrifugal washing in which the pulsator 16 and the washing tank 14 rotate together. Can be used as

Meanwhile, the washing machine to which the direct drive motor 22 is directly connected to the washing shaft 74 to transfer power as in the present embodiment is applied to a washing machine to which a general motor is applied, which requires an additional power transmission means such as a belt / pulley. Compared with the simpler structure, smaller volume and improved operational efficiency.

As described above, the washing machine according to the present invention can easily change the power transmission at the time of switching between the washing stroke and the dehydrating stroke using a buoyancy clutch of a simple structure, and the centrifugal washing with the pulsator and the washing tank rotating in the same direction. As described above, various types of washing operations are possible, and the operating efficiency is also improved due to the characteristics of the motor. Thus, the washing machine according to the present invention has the advantage of high productivity. By preventing the fitting portion of the member from being exposed to the outside, washing water is introduced into the fitting portion, and foreign substances are prevented from being caught, and thus, there is an advantage that the operation is smooth even when using a washing machine that has not been used for a long time.

Claims (4)

A reservoir, a washing tank, a pulsator, a direct drive motor that provides power for the rotary operation of the washing tank and the pulsator, a transmission for transmitting the power of the motor to the washing tank and the pulsator, and a vertical movement of the washing shaft. It includes a buoyancy clutch that is coupled to the serration and intermittently depending on the presence or absence of the wash water to selectively interlock the washing tank and the pulsator, The buoyancy clutch is a serration coupled to the washing shaft, the bottom surface is formed of a hub portion having a concave-convex engagement structure, and a hollow tube portion surrounding the hub portion and extending in the longitudinal direction of the lower vertical axis; Washing machine characterized in that it further comprises a fixing member having an upper surface has a concave-convex coupling structure to be engaged with the lower surface of the hub portion of the float. The method of claim 1, wherein the direct drive motor The stator which supports the washing shaft of the transmission to be rotatable, Washing machine, characterized in that consisting of a rotor coupled to the front end of the stator is coupled to the shape of the washing shaft. The method of claim 1 wherein the transmission is Hollow deshrinkage fixedly connected to the washing tank, A washing shaft mounted through the hollow dehydration shaft, the upper end of which is fixedly connected to a pulsator, and the lower end of which is connected to a motor; It includes a plurality of bearings for supporting the desorption, The washing machine, characterized in that any one of the bearing is made of a one-way type to allow the rotation of the dehydration side in only one direction. delete