KR100249361B1 - Structure of tub and turning shaft in a washing machine - Google Patents

Abstract

The present invention relates to a washing tank and a connection structure for connecting the washing tank and the driving side.

The connection structure according to the present invention comprises a washing tank base which forms a lower portion of the washing tank and is injection molded, and a drive shaft coupled through a shaft hole formed in the center of the washing tank base. In addition, each of the outer and inner circumferential surfaces of the shaft hole and the drive shaft is provided with a serration or spline type, so that the rotation of the drive shaft can directly rotate the washing tank. According to the present invention, it is also possible to form the entire washing tank by injection molding with a synthetic resin material.

Description

Washing tank and drive shaft connection structure of washing machine

1 is a cross-sectional view showing the configuration of a conventional washing machine of the washing tank rotating method.

2 is a cross-sectional view showing a connection structure of a first embodiment of the present invention.

3 is a cross-sectional view showing a connection structure of a second embodiment of the present invention.

4 is a cross-sectional view showing a connection structure of a third embodiment of the present invention.

5 is a cross-sectional view showing a connection structure of a fourth embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

50: washing tank 51: beads

52: washing tub body 54: washing tub base

55: rib 58: shaft

60: drive shaft 69: fixing nut

70: bush 80: herb

The present invention relates to a drive shaft of the washing machine and the connection structure of the washing tank, and more particularly, injection molding a part of the washing machine that performs the washing while directly rotating the washing tank, and simplify the connection between the driving shaft and the driving shaft for transmitting the rotational force. It relates to a laundry tub and its connection structure configured to be.

In general, the conventional washing machine of the pulsator type rotates the pulsator provided in the lower part of the washing tank in the forward / backward direction, thereby forming a water flow for washing so that washing is performed. As such, in a washing machine using a pulsator, a drive shaft for driving the pulsator and another drive shaft for rotating the washing tank when dewatering are required, and a clutch device for selectively driving these two drive shafts respectively. Should be installed.

The clutch device is a device for simultaneously transmitting the rotational force transmitted from the drive motor to the pulsator at the time of washing, and simultaneously to the pulsator and the washing tank at the time of dehydration, which is essential in the conventional washing machine as described above. However, since the internal structure of the clutch device and the connection structure between the pulsator and the respective shafts for rotating the washing tank are complicated, the clutch device increases the overall number of components of the washing machine and the assembly process is complicated. This is being pointed out.

In order to solve this drawback, a washing machine which omits the clutch from the washing machine and adopts a washing method of directly rotating the washing tank has been proposed as a Korean Patent No. 15706 in 1995. 1 schematically shows the configuration of a washing machine using this washing method. As shown, the washing machine using this method includes an outer tub 21 fixed to the inside of the outer casing 20, a washing tub 22 rotatably supported inside the outer tub 21, and the washing tub. It comprises a drive shaft 26 for rotating the 22. Rotation of the drive shaft 26 rotates the washing tub 22, so that washing proceeds while the washing tub 22 rotates forward and backward. The drive source for rotating the drive shaft 26 is a motor portion 28 directly attached to the lower end of the drive shaft 26. A rotor (not shown) of the motor unit 28 is directly connected to the lower end of the drive shaft 26, so that the rotation directly rotates the drive shaft 26. In addition, the washing tub 22 is composed of a washing tub body 22a which is a cylindrical side wall portion and a washing tub base 22b coupled to form a lower end of the washing tub body 22a in consideration of processing convenience, respectively. It is made of stainless steel. In addition, the washing blade base 22b is integrally molded by press working or the like to form the washing water flow when the washing tank is rotated.

Referring to the coupling relationship between the drive side 26 and the washing tank 22, the driving side 26 is coupled to rotate as the hub 24, the hub 24 is rotated together with the washing tank base 22b By being so deformed, the drive shaft 26 can rotate the washing tank 22 forward and reverse. Coupling of the drive shaft 26 and the hub 24 is interlocked by fixing the flange portion 26a formed at the upper end of the drive shaft 26 and the central portion of the hub 24 by using a fastening member 34 such as a screw. It is connected. And the coupling of the hub 24 and the washing tub 22, one end 24a and the washing tub base 22b of the hub 24 is fastened using a fastening member 32, such as a screw, can be interlocked. To be combined. The hub 24, which is made of aluminum die casting, serves to connect the drive shaft 26 and the washing tank 22 so as to rotate together, and at the same time, water penetrates into the drive shaft 26 during washing. In order to prevent this, the rib 24b for forming a predetermined air gap is provided in the center lower part of the hub 24.

An injection molded insulator 30 is interposed between the washing tank base 22 and the hub 24. The insulator 30 prevents the hub 24 formed of aluminum die casting and the stainless steel washing tank 22 from directly contacting each other, and as shown in the direction of the arrow when the washing tank 22 rotates, It also functions as a pump that forms a stream of water toward the top of the center.

According to the conventional structure comprised in this way, the rotating power in the drive shaft 26 is transmitted to the washing tank via the hub 24. Therefore, the structure for power transmission is complicated, the number of components increases, there is a problem that the assembly process is complicated.

In addition, although the washing blade is formed in the washing tank base 22b, in the washing machine in which the washing tank is directly rotated, the washing blade should be made of the same material even if it is integrally molded or separately molded to the stainless steel washing tank base. Because of this, there are certain constraints on the deformation of the design. This drawback is disadvantageous in terms of design because the design of the washing tank is noticeable when the laundry is put inside the washing machine, and at the same time, in terms of washing function due to the water flow in which the washing wings are formed during washing, As long as constraints on the deformation of the shape follow, there is a disadvantage that acts as a disadvantage.

The present invention is to solve the above disadvantages, an object of the present invention to provide a connection structure that can be easily connected to the drive shaft of the washing tank.

Another object of the present invention is to provide a washing tank which can be functionally produced cheaply and functionally modified inside the washing tank.

The connection structure according to the present invention for achieving the above object comprises at least a lower end of the washing tank injection molded, a drive shaft for rotating the washing tank, and an interlock means for interlocking the drive shaft and the washing tank. By such a configuration, a part of the washing tub is injection-molded with a resin material, thereby increasing productivity and simplifying the coupling structure with the drive shaft for rotating the washing tub.

According to a specific embodiment of the washing tank, the washing tank body forming the side wall of the washing tank, and the washing tank base connected to the lower portion of the washing tank body and injection molded.

According to another embodiment of the washing tank, by integrally injection molding the washing tank body and the washing tank base forming the side wall of the washing tank, the moldability of the washing tank is further improved.

And according to an embodiment of the interlocking means for connecting the washing tank and the drive shaft, the shaft hole formed in the washing tank base, the drive shaft connected to the washing tank base through the shaft hole, the rotation of the drive shaft is transferred to the washing tank, the shaft hole and the drive shaft It shows an example of the configuration consisting of the engaging means for engaging the mutual.

According to a specific embodiment of the engagement means, the outer circumferential surface of the drive shaft and the inner circumferential surface of the shaft hole is configured to one of each of the splicing type or serration formed, respectively, to transmit the rotation of the drive shaft to the washing tank.

According to another embodiment of the engagement means, the outer circumferential surface of the drive shaft and the inner circumferential surface of the shaft hole are configured in a square, such as a triangle, a square, a hexagon, and the like, respectively.

According to another embodiment of the interlocking means, the shaft hole is formed in the washing tank base, the bush coupled to the inside of the shaft hole, and the drive shaft coupled to the inside of the bush, the shaft hole and the bush, and the contact portion of the drive shaft In addition, either a spline tooth type or a serration molded to be interlocked with each other is molded. By this embodiment, it is possible to transfer a greater rotational force to the washing tank.

According to another embodiment of the interlocking means, the hub is fastened to the lower surface of the washing tub base and the drive shaft is fastened to the hub, according to this embodiment, without requiring many modifications in the conventional washing tank driving apparatus The present invention can be implemented.

In addition, the lower end of the washing tank base injection-molded by the present invention is configured to form a rib extending downward to form a predetermined air gap in the drive shaft portion, thereby serving as a conventional hub.

In addition, in the case of injection molding only the washing tub base, the washing tub body connected to the washing tub base to form a bead for strength reinforcement to further increase the strength of the washing tub.

Next, the present invention will be described in more detail with reference to the drawings.

2 is a cross-sectional view showing a connection structure of a first embodiment according to the present invention. As shown, the connection structure according to the present embodiment, the lower side of the washing tank 50, the washing tank base 54 which is injection molded with a synthetic resin material, and the drive shaft 60 directly connected to the washing tank base 54 It includes.

The washing tub 50 according to the present embodiment includes a washing tub body 52 that forms a side surface of the washing tub, and a washing tub base 54 that is connected to the washing tub body 52 to form a bottom surface of the washing tub. The washing tank base 54 is injection molded from a synthetic resin material, and the washing tank base 54 has a washing blade 56 for forming a predetermined washing water stream when the washing tank is rotated. It is preferable that the washing tub base 54 and the washing blade 56 are integrally molded by injection molding.

In this way, by integrally injection molding the washing tank base 54 and the washing blade 56 with a synthetic resin material, the washing tank base 54 can be molded at a low cost and easily, and at the same time, the washing blade generating washing water flow ( 56, the functional design change is facilitated. That is, by injection molding, the washing tank base 54 itself is easily molded and the external design of the washing tank base 54 can be easily changed.

In the present embodiment, the washing tub body 52 coupled to the upper portion of the washing tub base 54 is molded of stainless steel or the like as conventionally, and is combined with the washing tub base 54 to be integrated. Combination of the washing tub base 54 and the washing tub body 52, it is also possible to combine both by curling (Curling), as shown in the form of a flange portion in close contact with each other, and then in close contact with them It is also possible to combine using a plurality of fastening screws. And a balancer (B) for balancing the washing tank 50 at the time of dehydration is installed on the upper periphery of the washing tank (50). Coupling of the upper end of the balancer (B) and the washing tank body 52, it is possible to be fixed by curling or by using a plurality of fastening screws as described above.

In order to secure the strength of the portion where the washing tank base 54 and the washing tank base 52 are coupled, a bead 51 for reinforcing strength is formed in the washing tank body 53 adjacent to the coupling portion.

The shaft hole 58 to which the drive shaft 60 is coupled is formed in the central portion of the washing tub base 54 that is injection molded. The inner circumferential surface of the shaft hole 58 is formed with a spline inch type, and the spline inch type that is engaged with the teeth of the shaft hole 58 is also formed at the outer circumferential surface 62 of the corresponding portion of the drive shaft 60 inserted into the shaft hole 58. have. Accordingly, when the fixing nut 69 is fastened to the upper portion of the drive shaft 60 while the drive shaft 60 passes through the shaft hole 58, the outer circumferential surface of the drive shaft 60 and the inner circumferential surface of the shaft hole 58 are fixed. Splicing molds are formed in the state in which they are engaged with each other, the washing tank 50 is able to rotate together by the rotation of the drive shaft (60).

As described above, the drive shaft 60 and the shaft hole 58 of the washing tub base 54 are directly connected to each other so as to be interlocked with each other so as to be connected to the outer circumferential surface of the drive shaft 60 and the inner circumferential surface of the shaft hole 58. It is not limited to the spline inch type formed to engage each. Instead of the spline type, it is also possible to form a serration interlocking with each other, and as another embodiment, it is also possible to form the drive shaft and the shaft hole in a square, such as a triangle, a square, a pentagon or a hexagon. Do. For example, the outer circumferential surface of the corresponding portion of the drive shaft 60 inserted into the shaft hole 58 is formed into a hexagon, and the inner circumferential surface of the shaft hole 58 is formed into a hexagon inserted into the state in which the driving shaft 60 is in close contact. The rotational force of the drive shaft 60 can sufficiently rotate the washing tank 50.

In another embodiment, the fixing nut 69 sufficiently secures the fastening pressure applied to the washing tub base 54 by the fastening pressure, that is, by the fastening of the fastening nut 69, and interlocks with each other by the fastening pressure. It may be possible to configure it to do so.

As described above, when the drive shaft 60 is serially connected to the washing tank base 54 and the fixing nut 69 is coupled to the upper portion of the driving shaft 60 to prevent the washing tank base 54 from being separated, for finishing the interior of the washing tank. It is preferable to install a cap 54 to cover the fixing nut 69.

The rib 55 is integrally formed on the lower surface of the washing tub base 54 to form an air gap for waterproofing the drive shaft 60, like the rib 24b formed on the hub 24. It would be possible to do so.

According to the first embodiment of the present invention configured as described above, the washing tub base 54 constituting the lower portion of the washing tub 50 is made by injection molding with a synthetic resin material, the washing tub base 54 drive shaft 60 Direct connection to the drive shaft makes the connection to the drive shaft simple. Therefore, the structure for transmitting rotational power to the washing tub 50 becomes simpler, and the advantage of injection molding the washing tub base 54 is expected. Specifically, it can be seen that the deformation of the washing tub base is easy, and the deformation of the washing tank is easy, and thus, the deformation of the washing tank base, including the washing blades forming the water flow for washing, becomes easy.

Next, a second embodiment of the present invention will be described with reference to FIG.

This embodiment is an embodiment configured to form a washing tub base in the same manner as the above-described embodiment, but to further ensure the reliability of the rotational force transmission from the drive shaft to the washing tub base. In the description of this embodiment, the same components as in the above embodiment will be described with the same reference numerals.

According to the present embodiment, the driving shaft 60 and the washing tub base 54 facilitate the transmission of larger rotational force by transmitting the rotational power through the bush 70 interposed therebetween.

As described above, the inner circumferential surface of the shaft hole 58 of the washing tub base 54 and the upper outer circumferential surface of the drive shaft 60 are also formed in the spline inch type. In addition, spline-type molds are formed on the inner circumferential surface 74 and the outer circumferential surface 72 of the bush 70 interposed between the shaft hole 58 and the drive shaft 60, respectively. The bush 70 is formed of a general metal material or aluminum die casting, which is more advantageous for the transmission of the rotational torque.

Therefore, according to the present embodiment, the inner circumferential surface of the shaft hole 58 of the washing tub base 54 is engaged between the outer circumferential surface 72 of the bush 70, and the inner circumferential surface 74 of the bush 70 is connected to the outer circumferential surface of the drive shaft 60. Each meshes. And, as described above, it is also possible to form a spline-type or serration in each of the engaging portion so that the rotational power of the drive shaft 60 is transmitted to the washing tank (50). Also in this embodiment, the fixing nut 69 is fastened to the upper end of the drive shaft 60 to prevent the settazo base 54 from being separated.

In the present embodiment, the washing blades 5 6 are integrally molded on the upper surface of the washing tank base 54.

According to the present embodiment as described above, it can be seen that the rotational power of the drive shaft 60 is transmitted to the washing tank through the bush 70. In this case, the distance from the center of the drive shaft 60 to the shaft hole 58 of the washing tank base 54 is secured, thereby allowing a greater rotational force to be sufficiently transmitted. Considering the case of transmitting the same rotational force, sufficient power transmission is achieved even if the transmission force applied to each spline type is small compared with the first embodiment in which the drive shaft 60 and the shaft hole 58 of the washing tank base 54 are directly engaged. Since this becomes possible, it can be seen that the risk of tooth damage is much smaller.

Next, a third embodiment of the present invention will be described with reference to FIG. In this embodiment, the transmission of power in the drive shaft is transmitted through the hub as in the conventional structure, but shows an example of injection molding the washing tank base with a synthetic resin material. In the description of the present embodiment, the same components will be described with the same reference numerals.

The washing tub 50 according to the present embodiment also includes a washing tub body 52 made of stainless as in the prior art, and a washing tub base 54 connected to the lower end of the washing tub body 52 and injection molded. A boss 54a having a fastening hole 54b to which the fixing screw 82 to be described later is coupled is formed at the lower end of the washing tub base 54 which is injection molded from a synthetic resin material.

The drive shaft 60 is connected to the hub 80 with a fastening screw (not shown) through a flange 60f formed on the upper portion thereof. That is, it can be seen that the connection structure of the drive shaft 60 and the hub 80 is the same as the conventional one. The hub 80 is rotatably coupled with the washing tub base 54 via the screw 82.

According to this embodiment, the rotational force in the drive shaft 60 is transmitted to the washing tank base 54 via the hub 80. The washing tub base 54 according to the present embodiment is injection molded from a synthetic resin material in the same manner as the above-described embodiment, and the washing tank base 54 is integrally formed on the upper portion thereof.

According to this embodiment constituted as described above, by injection molding the washing tub base 54, the washing tank base including the advantages described above, for example, the production cost of the washing tub, washing blade 56 and the like ( It is expected that the molding of 54 will be facilitated, and at the same time, the design of the washing tub base 54 will be easy to change in terms of functionality. And according to this embodiment, the combination of the washing tank base 54 and the hub 80 is made by a screw 82, but in the washing tank base 54 and the boss 54a formed at the lower end injection molded of synthetic resin material Since it is connected from below, the upper part of the washing tank 50 is not exposed, and an advantageous aspect is expected. In the case of adopting the structure of the present embodiment, it is expected that the present invention can be sufficiently carried out by changing only the washing tank itself without large changes to the conventional structure.

Next, a fourth embodiment of the present invention will be described with reference to FIG. In this embodiment, the washing tub 50 itself is formed of one injection molded body integrally formed, and by connecting it directly to the drive shaft 60, the embodiment is more simply configured. In the description of the present embodiment, the same reference numerals are used for the same components.

As shown, according to this embodiment, the washing tank body 52 and the washing tank base 54 portion of the washing tank 50 are integrally molded by the injection of the synthetic resin material. That is, the injection molding of the entire washing tank 50 facilitates the shaping of the washing tank 50 itself, and at the same time makes it possible to easily change the design of the washing tank including a functional change, and to reduce the production cost of the washing tank. It becomes possible.

Of course, the lower surface of the washing tank 50 according to the present embodiment, the washing blade 56 for generating a water flow for washing when the washing tank 50 will be integrally molded.

And the shaft hole 58 to which the drive shaft 60 is coupled is formed in the center portion of the washing tub base 54 according to the present embodiment, the drive shaft 60 is coupled to the shaft hole 58, the drive shaft 60 Rotational force can be transmitted to the washing tank (50).

The coupling between the drive shaft 60 and the shaft hole 58 of the washing tub 50 is to apply the first embodiment of the invention shown in FIG. 2 or the second embodiment of the invention shown in FIG. It will be possible. Since the configuration for coupling the drive shaft 60 and the shaft hole 58 of the washing tub 50 will be omitted.

Alternatively, the power transmission structure of the washing tank 50 and the drive shaft 60 according to the present embodiment can be made similarly to the third embodiment shown in FIG.

According to the present invention as described above, the following advantages can be expected.

By injection molding the wash tub base or the wash tub as a part of the wash tub with a synthetic resin material, the production cost of the wash tub is reduced and the moldability of the wash tub is improved. Specifically, there is an advantage that it is possible to easily change the design of the inside of the washing tank and the design of the washing wing of the lower surface of the washing tank. This advantage makes it possible to expect an improvement in functionality due to a change in shape, not only on the side wall of the washing tub, but also on the bottom face on which the washing wings are molded. For example, by changing the shape of the washing blade, it is possible to make the water stream for washing more efficiently. In addition, by injection molding, it is possible to make the color of a part of the washing tank or the whole washing tank into a desired color, and this makes it possible to match the washing tank itself with the color of the exterior design of the washing machine, thereby creating a new aesthetic sense. It is possible.

Moreover, according to this invention, it becomes possible to directly connect a drive shaft and a washing tank by injecting at least the washing tank base. This means that in a conventional washing tank made of thin stainless steel, it is possible to omit ancillary components for rotating the washing tank, and thus the structure of the washing machine rotating washing machine itself, which performs washing while the washing tank rotates directly, It means you can do it simply.

And according to the embodiment through the bush formed by a metal material or aluminum die casting between the washing tank base and the drive shaft, it is expected that the advantage of being able to transfer a larger thermal power to the washing tank without difficulty.

In addition, according to the embodiment in which only the washing tank base is injection-molded, and the washing tank and the drive shaft are connected through the hub, it is possible to realize a lower production cost without much change in the conventional structure. It can be seen that by connecting the hub is not visible inside the washing tank, it has a multi-personal effect.

Claims (12)

A washing tank in which at least a lower end is injection molded; A drive shaft for rotating the washing tank; And an interlocking means for interlocking the drive shaft and the washing tub. According to claim 1, wherein the washing tub, washing tub body to form a side wall of the washing tub; A washing tub connection structure comprising a washing tub base connected to the lower portion of the washing tub body and injection molded. The laundry tub connection structure of claim 2, wherein the washing tub base is integrally molded with laundry vanes to form a water stream during washing. The laundry tub connection structure of claim 1, wherein the tub includes a tub for forming sidewalls of the tub and a tub base formed under the tub, and the tub and the tub are integrally injection molded. The laundry tub connection structure of claim 4, wherein the lower surface of the tub is integrally molded with laundry blades for forming water flow during washing. The shaft according to any one of claims 2 to 5, wherein the interlocking means includes a shaft hole formed in the washing tank base, a drive shaft connected to the washing tank base through the shaft hole, and the rotation of the driving shaft is transferred to the washing tank. Laundry tank connection structure consisting of the engaging means for engaging the ball and the drive shaft with each other. 7. The laundry tub connection structure of claim 6, wherein the engagement means is formed of any one of a spline-type or serration, each of which is formed so that the outer circumferential surface of the drive shaft and the inner circumferential surface of the shaft hole engage with each other. The laundry tub connection structure according to claim 6, wherein the engaging means is formed in a square shape, respectively, such that the outer circumferential surface of the drive shaft and the inner circumferential surface of the shaft hole are engaged with each other. The method according to any one of claims 2 to 5, wherein the interlocking means; A shaft hole formed in the washing tank base; A bush coupled to the shaft hole; And a drive shaft coupled to the bush; The shaft hole and the bush, and the contact portion of the drive shaft, washing tank connection structure is formed any one of the spline tooth type or serration is formed so as to interlock. The washing tank connecting structure according to any one of claims 2 to 5, wherein the genital interlocking means comprises a hub fastened to the lower surface of the washing tank base and a drive shaft fastened to the hub. The laundry tub connection structure according to any one of claims 2 to 5, wherein a lower end portion of the tub base includes a rib extending downward to form a predetermined air gap in a driving side portion. The laundry tub connection structure of claim 2 or 3, wherein a bead for strength reinforcement is formed on the side of the tub body connected to the tub base.

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