JP5753979B2 - Washing machine - Google Patents

Description

  The present invention relates to a washing machine that performs automatic control of washing, rinsing, and dewatering processes.

  Conventionally, in this type of washing machine, a flange for transmitting rotational force from a rotating shaft is provided at the bottom of a washing / dehydrating tank for stirring and dehydrating clothing, and the flange is provided for washing / demounting. It was fastened and fixed to the bottom of the aquarium with a plurality of screws. (For example, refer to Patent Document 1).

  FIG. 4 is a longitudinal sectional view of a conventional washing machine described in Patent Document 1. As shown in FIG.

  In FIG. 4, a clothes stirring pulsator 22 is rotatably arranged at the center inner bottom portion of a washing and dewatering tub 21 rotatably contained in a water tub 23, and a motor 28 and a mechanism driving portion are disposed on the outer bottom portion of the water tub 23. A substrate 24 on which 30 is disposed is fixed. An outer edge of the substrate 24 is suspended from an upper corner of the outer frame 25 via a vibration isolator 26. The rotating shaft 27 transmits the rotational force of the motor 28 via the belt 29 and the mechanism driving unit 30.

  A flange 31 is screwed and fastened to the outer bottom portion of the washing and dewatering tub 21 with a plurality of screws (not shown), and the rotation shaft 27 and the flange 31 are fastened and supported by a nut 35 to rotate the motor 28. The force is transmitted to the washing / dehydrating tub 21.

Japanese Utility Model Publication No. 3-68879

  However, in the conventional configuration, the flange that transmits the rotation of the rotating shaft to the washing and dewatering tub is screwed and fastened to the outer bottom surface of the washing and dewatering tub with a plurality of screws. In order to ensure its strength, it is made of a metal such as aluminum die casting and has a predetermined thickness. Therefore, a predetermined height space is required to connect the washing and dewatering tank and the flange in the water tank. As long as the height, that is, the height of the entire product is not increased, the volume of the washing and dewatering tank is reduced, which has a problem of affecting the washing performance.

  The present invention solves the above-mentioned conventional problems, and ensures a larger capacity of the washing and dewatering tank while ensuring the strength and reliability of the washing and dewatering tank without increasing the height of the product body. An object of the present invention is to provide a washing machine that improves washing performance.

In order to solve the above-described conventional problems, the washing machine of the present invention includes a cylindrical washing / dehydrating tank with a bottom having a pulsator rotatably disposed at the center bottom, and a water tub that rotatably includes the washing / dehydrating tank. When the dewatering rotation shaft driven by a motor, the dehydrating a rotary shaft and said washing and dewatering tank bottom connecting support, it has a boss portion substantially at the center, provided with a rotation shaft coupling hole portion to the boss portion a metal flange at substantially disk shape, and a flange nut the rotary shaft is fitted in the coupling hole the screwed into a threaded portion formed on dewatering rotation shaft fastening the said dewatering rotation shaft and the flange An upper groove portion is formed at the upper portion and a lower groove portion is formed at the lower portion on the side surface of the boss portion, and the flange is disposed on the outside of the outer peripheral portion of the boss portion, the upper groove portion and the lower groove portion. The structure is embedded in the bottom of the water tank.

  Accordingly, it is possible to improve the washing performance by ensuring a larger volume of the washing / dehydrating tub while ensuring the reliability of the washing / dehydrating tub without increasing the height of the product body.

  The washing machine of the present invention improves the washing performance by ensuring a larger volume of the washing and dewatering tank while ensuring the strength and reliability of the washing and dewatering tank without increasing the height of the product body. be able to.

1 is a longitudinal sectional view of a washing machine according to Embodiment 1 of the present invention. Cross section of the main part showing the configuration of the flange of the washing machine and the washing and dewatering tub Sectional drawing which shows the principal part which shows the flange of the washing machine in Embodiment 2 of this invention, and the structure of a washing and dewatering tank Vertical section of a conventional washing machine

A first aspect of the present invention is a bottomed cylindrical washing and dewatering tub in which a pulsator is rotatably disposed at a central bottom, a water tub that rotatably includes the washing and dewatering tub, and a dehydration rotating shaft driven by a motor. the dewatering rotation shaft and said wash and dewatering tank bottom connecting support, have a boss portion at substantially the center, and a metal flange at substantially disk shape provided with a rotary shaft coupling hole to the boss, the It is fitted to the rotating shaft coupling hole the screwed into a threaded portion formed on dewatering rotation shaft and a flange nut fastening the said dewatering rotation shaft and the flange, the side surfaces of the boss portion, the upper The upper groove portion is formed in the lower portion, the lower groove portion is formed in the lower portion, and the flange is embedded outside the outer peripheral portion of the boss portion, and the upper groove portion and the lower groove portion are embedded in the bottom portion of the washing and dewatering tub. Without increasing the height of the washing and dewatering tank While ensuring the strength reliability, capacity of the washing and dewatering tank can be improved more greatly securing to wash performance.

  In the second invention, in particular, the flange according to the first invention has an upper surface groove portion concentric with the boss portion on the outer side of the boss portion, so that the outer circumferential direction of the washing and dewatering tub is also provided. In addition, the expansion and contraction of the synthetic resin due to the change in the environmental temperature can be suppressed, cracks and the like are not generated in the joint portion, and the strength reliability can be improved.

  Hereinafter, embodiments of the invention will be described with reference to the drawings. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a washing machine according to Embodiment 1 of the present invention, and FIG. 2 is a principal sectional view showing a configuration of a flange and a washing and dewatering tub of the washing machine.

  1 and 2, a garment agitation pulsator 47 is rotatably arranged at the center bottom of a bottomed cylindrical synthetic resin washing and dewatering tub 46 that is rotatably contained in a water tub 45. .

  A substrate 48 is fixed to the outer bottom portion of the water tank 45. The substrate 48 includes a motor 49, a drain electromagnetic valve (not shown), a mechanism drive unit 50 with a built-in washing / dehydration switching clutch and brake, and the like. It is arranged. The outer edge portion of the substrate 48 is suspended from the upper corners of the outer frame 51 via the suspension rod 52 and the vibration isolator 53.

The rotational force of the motor 49 is transmitted to the washing and dewatering tub 46 and the pulsator 47 through the drive pulley 54 having the cooling fins, the belt 55 and the mechanism drive unit 50. A drain valve 56 is provided at the bottom of the water tank 45, and the water in the water tank 45 is opened and closed by a drain electromagnetic valve (not shown) and drained to the outside through a drain hose 57. .

  An upper frame 58 is provided at the upper part of the outer frame 51, a laundry input port 59 is formed at the approximate center thereof, and a lid 60 is accommodated at the upper part thereof so as to be freely opened and closed.

  A water supply device 61 is disposed inside the rear portion of the upper frame 58, and includes a water supply valve 62 and a water supply hose 63 for supplying water into the tank from above. A power switch 64 is also provided at the rear. A front cover 65 is provided at the front part of the upper frame body 58, and a control unit 66 having control means (not shown) for controlling the operation stroke is provided inside the front cover 65.

  At the bottom of the synthetic resin washing and dewatering tub 46, a boss portion 42 is provided in the approximate center, and a substantially disc-shaped metal flange 67 is embedded and fixed by insert molding. That is, the outer side of the outer peripheral portion 72 of the boss portion 42 is fixedly embedded in the washing and dewatering tub 46 in the flange 67. A plurality of drain holes 71 are formed on the outer peripheral side of the flange 67.

  At the center of the boss portion 42, there is formed a rotary shaft connecting hole 41 that fits and connects with the dewatering rotary shaft 68 of the mechanism drive unit 50. During assembly, the rotary shaft connecting hole portion 41 is fitted and the flange washer 69 is inserted and then dehydrated. A flange nut 70 is screwed into a threaded portion formed at the tip of the rotating shaft 68 so that the dewatering rotating shaft 68 and the flange 67 are fixed.

  Further, on the side surface of the boss portion 42, an upper groove portion 43a is formed at the upper portion and a lower groove portion 43b is formed at the lower portion, and the synthetic resin material of the washing and dewatering tub 46 is filled by insert molding.

  The dewatering rotation shaft 68 is hollow at the center of the rotation shaft, concentrically passes through the washing rotation shaft (not shown), and the pulsator 47 is screwed to the tip of the washing rotation shaft. The rotational force of the motor 49 is transmitted to a washing rotation shaft (not shown) during washing by rotating the clutch of the mechanism driving unit 50, and the pulsator 47 rotates, and during dehydration, it is transmitted to the dewatering rotation shaft 68 to perform washing and washing. The dewatering tank 46 rotates.

  The operation and effect of the washing machine configured as described above will be described below.

  A flange 67 for connecting and supporting the washing / dehydrating tank 46 made of synthetic resin and the dewatering rotary shaft 68 is embedded and fixed to the bottom of the washing / dehydrating tank 46 by insert molding, so that an effective space below the washing / dehydrating tank 46 is increased. By using the effective space, it is possible to increase the internal volume of the washing and dewatering tank 46 without increasing the product body, that is, without increasing the water tank 45, thereby improving the washing performance. it can.

  Further, even if the synthetic resin of the washing and dewatering tub 46 expands and contracts due to a change in the environmental temperature of the place where the washing machine is installed or by using hot water, the side of the boss 42 on the side of the boss portion 42 at the substantially center of the flange 67. Even if there is a difference in the expansion rate between the washing / dehydrating tub 46 made of synthetic resin and the flange 67 made of metal, the upper groove portion 43a and the lower groove portion 43b provided in the circumferential direction are filled with the synthetic resin material. The movement of the synthetic resin having a large expansion coefficient is suppressed by the groove portion, so that cracks or the like are not generated in the joint portion, and strength reliability can be ensured.

As described above, in the first embodiment, the flange 67 for connecting and supporting the dewatering rotary shaft 68 and the washing / dehydrating tub 46 is embedded in the bottom of the washing / dehydrating tub 46 by insert molding, and the flange 67 is substantially at the center. By filling the synthetic resin material of the washing and dewatering tank 46 into the upper groove 43a and the lower groove 43b formed on the side surface of the boss part 42, the strength of the washing and dehydrating tank 46 is increased without increasing the height of the product body. It is possible to improve the washing performance by securing a larger volume of the washing and dewatering tub 46 while ensuring a high reliability.

(Embodiment 2)
FIG. 3 is a cross-sectional view of the main part showing the configuration of the flange and the washing and dewatering tub according to the second embodiment of the present invention. In FIG. 3, the same reference numerals as those of the first embodiment are the same as those of the first embodiment, and are the same as those of the first embodiment except for the configuration of the flange and the washing and dewatering tub.

  In FIG. 3, a synthetic resin-made washing and dewatering tub 46 has a boss portion 42 in the approximate center and a substantially disk-like metal flange 67 embedded and fixed by insert molding. That is, the outer periphery of the flange 67 other than the boss portion 42 is embedded and fixed in the washing and dewatering tub 46.

  Further, on the side surface of the boss portion 42, an upper groove portion 43 a is formed at the upper portion and a lower groove portion 43 b is formed at the lower portion, and an upper surface groove portion 44 is formed concentrically with the rotary shaft connecting hole portion 41 outside the boss portion 42. The synthetic resin material of the washing and dewatering tank 46 is filled by insert molding.

  As described above, in the second embodiment, the upper surface groove portion 44 is formed concentrically with the boss portion 42 on the outer side of the boss portion 42 substantially at the center of the flange 67, and the upper surface groove portion 44 is subjected to washing and molding by insert molding. By filling the synthetic resin material in the dewatering tank 46, the expansion and shrinkage of the synthetic resin due to the change of the environmental temperature can be suppressed also in the outer peripheral direction of the washing and dewatering tank 46, and a crack or the like is generated at the joint. There is no, and strength reliability can be improved.

  As described above, the washing machine according to the present invention increases the capacity of the washing and dewatering tank while improving the washing performance while ensuring the strength reliability of the washing and dewatering tank. It can be applied to other uses such as washing machines where importance is attached.

42 Boss part 43a Upper groove part 43b Lower groove part 44 Upper surface groove part 45 Water tank 46 Washing and dewatering tank 47 Pulsator 48 Substrate 49 Motor 51 Outer frame 53 Anti-vibration device 67 Flange 68 Dehydration rotating shaft 70 Flange nut 72 Outer peripheral part

Claims (2)

A bottomed cylindrical washing and dewatering tub with a pulsator rotatably disposed at the center bottom, a water tub enclosing the washing and dewatering tub rotatably, a dehydration rotation shaft driven by a motor, and the dehydration rotation shaft the washing and connecting support and dewatering tank bottom, have a boss portion at substantially the center, and a metal flange at substantially disk shape provided with a rotary shaft coupling hole to the boss, to the rotation shaft coupling hole A flange nut that is screwed into a threaded portion formed on the fitted dewatering rotary shaft and fastens the flange and the dewatering rotary shaft is provided. The lower groove is formed on the outer periphery of the boss, and the upper groove and the lower groove are embedded in the bottom of the washing and dewatering tub. The washing machine according to claim 1, wherein the flange has an upper surface groove portion concentrically with the boss portion outside the boss portion.