JP4577166B2 - Drum washing machine - Google Patents

Description

  The present invention relates to a drum-type washing machine including a rotating drum that is rotatably arranged in a water tub so that a rotation axis direction is substantially horizontal or inclined.

A conventional drum type washing machine of this type has a rotating drum having a stirring protrusion formed in a cylindrical shape, forming a large number of water passages and protruding at a plurality of locations on an inner peripheral wall, and rotating the rotating drum. A water tub is provided that can be rotatably stored so that the axial direction is substantially horizontal or inclined, and by rotating the rotating drum, the laundry stored in the drum is hooked on the stirring protrusion and lifted. When the laundry falls from an appropriate height, the laundry is beaten and washed, and at the time of dehydration, centrifugal dehydration is performed by high-speed rotation of a rotating drum (for example, see Patent Document 1).
JP 09-215894 A

  FIG. 4 shows the configuration of a conventional drum type washing machine. The configuration of the conventional example and the problems to be solved will be described below with reference to the drawings.

  A cylindrical rotary drum 1 that also serves as a washing tub and a dewatering tub is provided with a large number of water outlets 2 on the outer peripheral portion thereof, and is rotatably disposed in the water tub 3. A rotating shaft 4 is fixed to the rotation center of the rotating drum 1, and is connected to a driven pulley 22 driven by a motor 5 and a belt 21 fixed to an outer bottom portion of the water tank 3.

  The water tank 3 is supported by the spring body 8 so as to hang down from the outer box 7, and is supported by a damper 23 for vibration isolation. A rotating shaft 4 that transmits rotation to the rotating drum 1 is supported by a bearing 24, and the bearing 24 is held in a water tank cover 25 that is fixed to the outside of the back surface of the water tank 3.

  That is, the water tank cover 25 supports the water tank 3 and has a bearing holding portion 25a that supports the bearing 24 that supports high-speed rotation of the rotary drum 1 as an integral or separate member. It is configured to cover almost the entire surface of the outside of the.

  In such a conventional drum-type washing machine, the bearing holding portion that holds the rotating shaft 4 of the rotating drum 1 has a size approximately equal to the projected area of the rear surface of the water tank on the outer side of the rear surface of the water tank 3 from the strength-oriented surface. Since the formed water tank cover 25 is attached by screwing or the like, the bearing holding portion 25a is a large and heavy heavy-duty structure, and both the water tank cover 25 and the bearing holding portion 25a are expensive. Had the following problem.

  Moreover, when the garment imbalance state in the drum is large or when the rotational speed is high, the stress value near the bearing holding member mounting portion of the aquarium becomes large or deformation points concentrate. In order to ensure reliability, the startup performance in the unbalanced state has been reduced to a limit level where there is no problem, or the drum rotation speed has been reduced to a limit level where dewatering performance can be ensured.

  In particular, this type of structure was a member that had to be standardized from the viewpoint of productivity even if the type of machine was diversified, such as the washing capacity of the washing machine, diversification of the spin speed, etc. In pursuing standardization of aquarium covers, there was a problem to be solved in terms of reliability in order to pursue higher dewatering performance.

  The present invention solves the above-described conventional problems, and achieves a higher degree of dewatering performance after realizing a reduction in size as a bearing holding member, improving cost performance, and standardizing a water tank in which the bearing holding member is inserted. The purpose is to provide a drum-type washing machine that can ensure sufficient reliability even in the model to be pursued.

In order to solve the above-described conventional problems, a drum-type washing machine according to the present invention includes a rotating drum that stores clothing and has a horizontal or inclined rotation center shaft, a plastic water tank that rotatably stores the drum, And a motor for driving the rotating drum, a flange portion is extended on the outer peripheral side of the bearing holding member that holds the bearing that supports the rotation of the rotating drum, and an annular ring is formed near the outer periphery of the bearing holding member of the flange portion . Protruding ribs are provided, and the water tank is integrally formed by insert molding the bearing holding member and the flange part, and the convex ribs of the flange part increase the degree of adhesion with the water tank, and close to the convex ribs. A boss portion capable of screwing the reinforcing member is formed in the water tank .

The drum type washing machine of the present invention comprises a water tank and a miniaturized bearing holding member. The bearing holding member and the flange portion are insert-molded in the water tank to improve cost performance, and an annular shape formed near the outer periphery of the flange portion. By increasing the degree of adhesion to the water tank with convex ribs, the stress near the outer periphery of the bearing holding member is relieved, and for models that pursue high dewatering performance, the annular shape formed near the outer periphery of the bearing holding member of the water tank By forming a boss that can be screwed to the reinforcing member in the vicinity of the convex rib, the reinforcing member can be added to ensure reliability and eliminate the member of the water tank cover, thereby improving cost and standardization. be able to.

The first invention includes a rotary drum having a rotation center axis that is horizontal or inclined accommodating clothes, a plastic water tank for rotatably accommodating the rotary drum, and a motor for driving the rotary drum, wherein A flange portion is extended on the outer peripheral side of the bearing holding member that holds the bearing that supports the rotation of the rotating drum, an annular convex rib is provided in the vicinity of the outer periphery of the flange portion , and the water tank includes the bearing holding member and the with flange portion is molded by insert, increasing the degree of adhesion between the water tub by the convex ribs of the flange portion, the screw can boss reinforcing member in proximity to the convex ribs formed on the tub and by comprising, the bearing holding member and the flange portion to improve cost power insert molded into the water tank, the flange portion of the water tank at the outer periphery near the formed annular convex rib By increasing the degree of fitting, stress near the outer periphery of the bearing holding member is relieved, and for models that pursue high dewatering performance, reinforcement close to the annular convex rib formed near the outer periphery of the bearing holding member of the aquarium by forming the screw can boss member, a reinforcing member so than the outside are made possible additional can ensure the reliability enough, it is possible to improve the standardization.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a schematic cross-sectional view of the drum type washing machine according to the first embodiment of the present invention, and FIG. 2 is a cross-sectional view of the main part of the drum type washing machine. FIG. 3 is a sectional view of the water tank of the drum type washing machine.

  1 and 2, a water tank 33 is suspended and supported by a suspension 28 and an anti-vibration damper 29 in a housing 32 of a drum type washing machine 31, and a drum 34 formed in a bottomed cylindrical shape in the water tank 33. However, the axial center direction is inclined downward from the front side toward the back side and is rotatably arranged. A water tank cover 36 that forms an opening 35 is disposed on the front side of the water tank 33, a clothing doorway leading to the opening 35 is formed, and a window 37 closes the opening 35 in an openable and closable manner. .

  The rotating drum 34 has a large number of water inlets 39 communicating with the inside of the water tank 33 on its peripheral wall, and agitation protrusions 38 are provided at a plurality of positions on the inner peripheral surface. The drum 34 is rotationally driven in forward and reverse directions by a motor 40 attached to the bottom surface of the water tank 33, a motor pulley 41 attached to the shaft of the motor 40, and a belt 42 suspended on the motor pulley 41. . A drum flange 46 fixed to the drum shaft 45 press-fitted into the bearing A 53 and the bearing B 54 of the bearing holding member 43 insert-molded in the water tank 33 is fixed to the back surface of the rotating drum 34 to rotate the rotating drum 34. keeping.

  The bearing holding member 43 has a flange portion 47 extending on the outer peripheral side thereof, and a plurality of through holes 47 a are provided in the flange portion 47, and an annular convex rib 48 is provided in the vicinity of the outer periphery of the flange portion 47. However, this is also a configuration for increasing the degree of adhesion of the insert molding with the water tank 33.

  In the water tank 33, a boss A49 is formed in the vicinity of the convex rib 48 of the bearing holding member 43, and a boss B50 is further formed outside the boss A49. Further, in order to improve the strength of the water tank 33 itself, a large number of ribs 33a are integrally formed on the outer surface, in order to maintain the strength of the water tank cover 25 in the conventional example (FIG. 4). Further, since the water tank 33 can be processed with a material such as a plastic material or an aluminum material, productivity can be improved.

  The attachment of the reinforcing member will be described with reference to FIG. 3. The attached state of the reinforcing member 51 made of a steel plate or the like that can be attached to the water tank 33 is shown, and the boss portion A49 and the screw are close to the convex rib 48 of the water tank 33. At 55, the outer boss B50 is fastened and fixed with a screw 56 at a plurality of locations.

  The operation of the drum type washing machine having the above configuration will be described.

  When the window 37 is opened and laundry and detergent are put into the rotating drum 33 and the operation of the drum-type washing machine 31 is started, the water supply valve 44 is energized to operate, and a predetermined amount of water enters the water tank 33 at a predetermined time. Water is poured, and the rotary drum 34 is driven to rotate by the motor 40 to perform the washing process. At this time, the laundry accommodated in the rotating drum 34 is lifted in the rotating direction by the stirring protrusions 38 provided on the inner peripheral wall of the rotating drum 34 due to the rotation of the rotating drum 34, and from the lifted appropriate height position. The falling stirring action is repeated.

  After the required washing time, the dirty washing liquid is discharged, the washing liquid contained in the laundry is centrifugally dehydrated by a dehydrating operation that rotates the rotating drum 34 at a high speed, and then the water is poured again into the water tank 33 to perform a rinsing process. Finally, the dehydration process is performed.

  Since the dehydration process is performed at a high speed, the stress value in the vicinity of the outer periphery of the bearing holding member 43 of the water tank 33 is increased or deformed when the unbalanced state of the clothes in the rotating drum 34 is large or the rotational speed is high. Although the points are concentrated, in a type of washing machine with a low dehydration speed, the load is also low, so that the reliability can be ensured without attaching the reinforcing member 51 to the water tank 33.

  On the other hand, in the washing machine of the high speed dewatering specification, the reinforcing member 51 is fixed to the boss portion A49 on the convex rib 48 and the outer boss portion B50 of the water tank 33 with screws, so the vicinity of the outer periphery of the bearing holding member 43 of the water tank 33 The stress value is relaxed, the concentration of deformation points can be prevented, and the reliability of the water tank 33 with the bearing holding member 43 inserted can be secured while pursuing higher dewatering performance. .

  As described above, the drum-type washing machine according to the present invention is a popular type drum-type washing machine, which realizes downsizing of the bearing holding member by insert molding to improve cost power, and is more sophisticated than a high-end type. For models pursuing dewatering performance, it is possible to add a reinforcing member by forming a boss part that can be screwed to the reinforcing member in the vicinity of the annular convex rib near the outer periphery of the bearing holding member. Since it can be sufficiently secured and standardization can be improved, it is useful for household, commercial washing machines, washing devices and the like.

Schematic sectional view of the drum type washing machine in the first embodiment of the present invention. Cross section of the main part of the drum type washing machine Sectional view of the water tank of the drum type washing machine Schematic sectional view of a conventional drum-type washing machine

33 Water tank 34 Rotating drum 40 Motor 43 Bearing holding member 48 Convex rib 49 Boss part A (boss part)
51 Reinforcing member

Claims (1)

Comprising a rotary drum accommodating the garment has a rotation center axis that is horizontal or inclined, and plastic aquarium for rotatably accommodating the rotary drum, and a motor for driving the rotary drum, supporting the rotation of said rotary drum A flange portion is extended on the outer peripheral side of the bearing holding member that holds the bearing to be provided, an annular convex rib is provided in the vicinity of the outer periphery of the flange portion , and the water tank is inserted with the bearing holding member and the flange portion. while being molded, increasing the degree of adhesion between the water tub by the convex ribs of the flange portion, the screw can boss reinforcing member proximate the convex rib, the drum type washing obtained by forming the water tank Machine.

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