• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a connection structure of a hub and a drive shaft connected to a washing machine in a washing machine that performs washing while the washing tank rotates. The connection structure according to the present invention includes a washing tank for washing laundry while rotating, a hub connected to the washing tank to rotate the washing tank, and a top end formed in a state inserted into the hub, thereby driving a drive shaft for transmitting rotational power to the hub. It is configured to include. And the outer peripheral surface of the upper end of the drive shaft inserted in the said hub is provided with the tooth shape, or it shape | molded in a square shape, and ensures the transmission of drive torque more reliably.
    公开号:KR19990030910A
    申请号:KR1019970051371
    申请日:1997-10-07
    公开日:1999-05-06
    发明作者:류재철；김준우；강창식
    申请人:구자홍；엘지전자 주식회사；
    IPC主号:
    专利说明:

    Drive shaft connection structure of washing machine
    1 is a schematic configuration diagram of a conventional washing machine using a clutch device.
    2 is a cross-sectional view of a conventional washing machine of the washing tank rotating method.
    3 is a cross-sectional view showing a coupling structure of the drive shaft according to the present invention.
    <Description of Symbols for Main Parts of Drawings>
    50 .... Hub 60 ...... Drive Shaft
    62 .... Flange
    The present invention relates to a drive shaft connecting structure of a washing machine, and more particularly, to a drive shaft connecting structure for inserting and molding the drive shaft in the hub connected to the washing tank to rotate the washing tank in the washing machine in which the washing is rotated while the washing tank is rotated. .
    1 shows the structure of a washing machine according to the conventional structure for selectively transmitting power to a washing tank or pulsator using a clutch. As illustrated, a conventional washing machine using a clutch includes an outer tub 4 supported in a fixed state inside the outer casing 2 and an inner tub 6 rotatably supported in the outer tub 4. And a pulsator 8 rotatably supported independently of the lower end of the inner tub 6. The inner tub 6 is a portion in which laundry is received by washing, and the washing operation is mainly performed by the rotation of the pulsator 8 installed at the lower end of the inner tub 6.
    At the lower side of the outer tub 4, a clutch device 14 for selectively rotating the inner tub 6 or the pulsator 8 is provided. The transmission of power to the clutch device 14, the rotational force of the drive motor 16 is transmitted by the belt drive device (18). The power transmitted from the drive motor 16 is selectively transmitted to the pulsator shaft 10 or the inner tubular shaft 12 by the clutch device 14. Specifically, power is transmitted to rotate the pulsator 8 through the pulsator shaft 10 in the washing mode, and simultaneously rotates the pulsator shaft 10 and the inner tubing shaft 12 in the dehydration mode. The pulsator 8 and the inner tank 6 rotate at the same time to proceed with dehydration.
    However, according to this conventional structure, many disadvantages are pointed out due to the clutch device 14 for selectively transmitting the rotational power in the motor 16 to the pulsator 8 or the inner tub 6. In practice, since the internal structure of the clutch device 14 is quite complicated, the number of parts increases and the assembly process becomes complicated, which is disadvantageous in terms of increasing manufacturing cost and maintaining maintenance.
    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 in 1995 Korean Patent No. 15706.
    2 schematically shows a configuration of a washing machine using this washing method. As illustrated, a washing machine using this method includes an outer tub 21 supported in a fixed state inside the outer casing 20 and a washing tub 22 rotatably supported in the outer tub 21. And a drive shaft 26 for rotating the washing tank 22. Rotation of the drive shaft 26 directly rotates the washing tub 22, so that the washing tub 22 rotates in the forward and reverse directions to wash the laundry in the washing tub 22. 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. That is, the rotor (not shown) of the motor unit 28 is connected to the lower end of the rotating shaft 26, so that the rotation directly rotates the drive shaft 26. 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.
    Looking at the coupling relationship between the drive shaft 26 and the washing tub 22, the drive shaft 26 is coupled to rotate with the hub 24, the hub 24 is to rotate with the tub base 22b By being coupled, 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. In addition, the fastening member 34 used to couple the hub 24 and the drive shaft 26 actually uses a plurality of fastening screws.
    However, according to the conventional structure, although it can be seen that the structure becomes relatively simple by omitting the clutch, it is pointed out that the connection structure for connecting the drive shaft 26 and the washing tank 22 is stately complicated. do. That is, the drive shaft 26 is configured to rotate like the hub 24 by using a plurality of fastening members such as screws, so that the number of parts due to each fastening member increases, and a plurality of fastening members In order to fasten by using, a disadvantage arises in that the fastening structure (fastening hole to be formed in each) required for the hub and drive shaft becomes complicated.
    In addition, in the process of assembling the said drive shaft 26 and the hub 24, it is necessary to fasten in the state which matched the fastening hole formed in each. That is, in the assembly process, there is a disadvantage that the efficiency of the assembly process is lowered due to the problem of positioning for fastening.
    The present invention is to solve this problem, and to provide a structure for connecting the drive shaft and the hub in a simpler structure.
    The connection structure according to the present invention for achieving this object, the washing tub for washing the laundry while rotating, the hub connected to the washing tub to rotate the washing tub, and the upper end is molded in a state inserted into the hub, the rotational power It is configured to include a drive shaft for transmitting to the hub. This configuration eliminates a separate fastening step for fastening the drive shaft and the hub and at the same time simplifies the configuration itself.
    In order to ensure the transmission of the drive torque, the outer peripheral surface of the upper end of the drive shaft inserted into the hub forms a predetermined tooth such as a spline, a serration, or a spur gear.
    Alternatively, the outer peripheral surface of the upper end of the drive shaft inserted into the hub is molded into a square shape to ensure transmission of the drive torque.
    Next, the present invention will be described in more detail with reference to the embodiments shown in the drawings.
    As shown in FIG. 3 showing the drive shaft connection structure of the present invention, according to the present invention, the hub 50 is molded by inserting the drive shaft 60 when the hub 50 is molded, thereby integrating with the hub. It is characterized in that the driven drive shaft is made.
    In the illustrated embodiment, the flange portion 62 is formed on the upper portion of the drive shaft 60, and the hub 50 is molded in the state in which the flange portion 62 is inserted when the hub 50 is molded. . Substantially the hub 50 is currently made primarily of aluminum die casting. Therefore, when die casting of the hub 50, by performing die casting in the state in which the drive shaft 60 is inserted in advance, it is possible to obtain a hub in which the drive shaft is integrated by the present invention. And the hub 50 has the same appearance as the conventional structure, by being fastened to a washing tank (not shown), the rotational force of the drive shaft 60 is to be transmitted to the washing tank.
    And the hub 50 completed in the state in which the drive shaft is inserted in this way, rotates as the rotation of the drive shaft 60, is for transmitting power to the washing tank. Therefore, it is necessary to rotate at the same rotation speed as the rotation of the drive shaft 60. That is, since it is necessary to rotate without loss of the driving torque transmitted to the hub, it is preferable to implement the shape of the portion inserted into the hub 50 in a shape suitable for the rotational torque transmission.
    In the illustrated embodiment, the flange portion 62 of the drive shaft 60 is shown in the same circular shape as the drive shaft 60, the following modifications are possible.
    First, it may be considered to form the insert portion of the drive shaft 60 into a predetermined square. That is, for example, by forming the flange portion 62 of the drive shaft 62 into a hexagon, like the head of the hexagon bolt, it will be possible to more securely transmit the rotational torque. And the shaping of the square, of course, such as a square or pentagon, many other modifications are possible within the range that the transmission of the drive torque is possible.
    As another method, it is also possible to form a spline tooth on the outer circumferential surface of the insert portion of the drive shaft 60. By forming the spline teeth in the longitudinal direction on the outer circumferential surface of the flange portion 62 of the drive shaft 60, the rotational torque can be transmitted without slipping. As another configuration, it is possible to consider forming a tooth such as a spur gear instead of a spline tooth, and it may be possible to form a serration. It can be seen that this embodiment substantially forms a predetermined tooth for the transmission of the drive torque to the insert portion of the drive shaft 60.
    In the description of the above-described embodiment, the hub is formed by aluminum die casting, and a method of inserting and forming the drive shaft during die casting of the hub is described. However, shaping of the hub is not limited to aluminum die casting. For example, it is also possible to carry out by injection molding synthetic resin having sufficient strength. In this case, the drive shaft according to the present invention can be implemented in the same way by insert injection molding at the time of injection molding of the hub. It can be seen that this is only different from die casting molding in that the driving shaft is molded in the inserted state during the injection molding of the hub and is included within the scope of the present invention.
    As described above, according to the present invention, when molding the hub connected to the washing tub, by die casting or injection molding with the drive shaft inserted, there is no need for a separate fastening member for fixing the drive shaft and the hub. do. Therefore, the structure of the present invention, by simplifying the connection structure of the drive shaft and the hub, it is to provide the effect of reducing the number of necessary components and simplify the assembly process.
    In addition, since it is possible to omit the process for fastening the drive shaft and the hub separately, a process for positioning the fastening when the hub and the drive shaft is fastened in the assembly process is omitted, it is possible to expect productivity improvement during assembly.
    权利要求:
    Claims (5)
    [1" claim-type="Currently amended] A washing tank for washing laundry while rotating;
    A hub connected to the washing tub to rotate the washing tub; And
    Drive shaft connecting structure of the washing machine is formed with the upper end is inserted into the hub, the drive shaft for transmitting the rotational power to the hub.
    [2" claim-type="Currently amended] The method of claim 1,
    The outer peripheral surface of the upper end of the drive shaft is inserted into the hub, the drive shaft connecting structure of the washing machine having a tooth for the rotational torque transmission.
    [3" claim-type="Currently amended] The method of claim 1,
    Drive shaft connecting structure of the washing machine is formed in a square of the upper outer peripheral surface of the drive shaft is inserted into the hub.
    [4" claim-type="Currently amended] The drive shaft connecting structure according to any one of claims 1 to 3, wherein the hub is formed by die casting while the upper end of the drive shaft is inserted.
    [5" claim-type="Currently amended] The drive shaft connecting structure according to any one of claims 1 to 3, wherein the hub is formed by injection molding in a state where an upper end of the drive shaft is inserted.
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    同族专利:
    公开号 | 公开日
    KR100254617B1|2000-05-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1997-10-07|Application filed by 구자홍, 엘지전자 주식회사
    1997-10-07|Priority to KR1019970051371A
    1999-05-06|Publication of KR19990030910A
    2000-05-01|Application granted
    2000-05-01|Publication of KR100254617B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019970051371A|KR100254617B1|1997-10-07|1997-10-07|The joining structure of driving shaft in a washing machine|
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