JP2006034755A - Drum type washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum type washing machine having a support structure restraining vibration caused by the rotation of a rotating drum, from being transmitted to a washing machine case. <P>SOLUTION: A water tub unit 5 storing the rotating drum 2 in a water tub 3 is supported by a vibration control damper 70 from below in a position toward a front face rather than its center-of-gravity position, and the upper part of the water tub unit 5 is elastically energized to the front face side by a first coil spring 71. Further, the lower part of the water tub unit is elastically energized to the back face side by a plurality of second coil springs 72a, 72b. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a drum-type washing machine that performs a washing, rinsing, and dewatering processes by rotationally driving a rotating drum containing laundry.

Conventionally, since the drum type washing machine is disposed in the water tub with the rotation axis of the rotation drum inclined in the horizontal direction or the horizontal direction, when the laundry is accommodated in the rotation drum and rotated, Since laundry and water tend to be biased downward, vibration is likely to occur. In particular, when carrying out the dehydration process by rotating the rotating drum at a high speed, if the laundry in the rotating drum is gathered at a biased position, a large vibration is generated in the water tank that houses the rotating drum. In order to suppress such vibration associated with the rotation of the rotating drum, a water tank is supported by an anti-vibration damper having a large buffering force to reduce the vibration amplitude (see, for example, Patent Document 1).
JP-A-6-327892 (pages 2 to 4, FIG. 1)

  However, such a conventional water tank containing a rotating drum is mounted with a bearing or drum drive motor that supports the rotating shaft of the rotating drum behind it, so that the weight balance is biased to the rear side. Yes. When supporting such a water tank with an anti-vibration damper, the anti-vibration damper is placed below the position of the approximate center of gravity of the water tank, but the water tank in which the laundry and water move within the rotating drum is supported at a biased position. Since it becomes very unstable, a weight is attached to the front side of the aquarium to adjust the weight balance between the front and rear, a vibration damping damper is placed in the lower center of the aquarium, and the center of gravity is constantly adjusted by the rotation of the rotating drum In order to maintain the balance of the moving water tank, the upper part of the water tank is elastically pulled and biased by a plurality of spring members.

  In the conventional structure as described above, there are many components to absorb the vibration of the aquarium and maintain the balance, and there are particularly heavy components such as weights, which leads to an increase in weight as a drum type washing machine. However, there was a problem that led to cost increase.

  The present invention solves the above-described conventional problems, and provides a drum type washing machine having a support structure that effectively suppresses vibration of a water tank containing a rotating drum and maintains balance without causing an increase in weight. The purpose is to do.

  In order to achieve the above-mentioned object, the washing machine supports a water tank unit in which a rotating drum is accommodated in a water tank by a vibration-damping damper from below at a position closer to the front than the center of gravity, and the upper part of the water tank unit is front-facing. The drum type washing machine is elastically urged to the side by a first coil spring and elastically urged below the water tank unit to the back side by a plurality of second coil springs.

  As a result, the water tank unit is held at a predetermined position in the washing machine casing, and vibrations in the lower part of the water tank unit can be suppressed, and low vibration can be realized.

  The washing machine of the present invention can support the aquarium unit whose center of gravity is biased to the back side in a well-balanced manner in the washing machine casing, and has a vibration damping structure that effectively suppresses vibration applied to the aquarium unit by elastic support. Can be configured.

  A drum-type washing machine according to a first aspect of the present invention has a rotating shaft fixed at the center of the bottom surface of a bottomed cylindrical rotating drum disposed in a water tank formed in a bottomed cylindrical shape, fixed to the bottom surface of the water tank. A water tub unit, which is supported by a shaft bearing and connected to a drum drive motor on a rotating shaft, is disposed in the washing machine casing, and the water tub unit is provided by a vibration proof damper having a lower end fixed to the base of the washing machine casing. Is provided at a position closer to the front side than the position of the center of gravity, and a first urging means is provided for elastically urging the aquarium unit at least on the front side above the supporting height position by the vibration damping damper. A plurality of second urging means for elastically urging at least the rear side below the support height position by the vibration proof damper are provided.

  According to the above configuration, the aquarium unit containing the rotating drum in the aquarium is supported by the anti-vibration damper from the lower side at a position closer to the front side than the center of gravity, so the weight of the aquarium unit reduces the vibration damping function of the anti-vibration damper. It is supported with. The aquarium unit that tends to fall to the back side by being supported at a position displaced from the position of the center of gravity is elastically urged upward by the first urging means and the second urging means to the front side. Since the second urging means corrects at a plurality of positions, the water tank unit is corrected by being elastically urged not only in the front-rear direction but also in the left-right direction. While being held at a predetermined position in the washing machine casing, vibrations of the upper and lower parts of the water tub unit can be suppressed, and low vibration can be realized.

  A second invention is characterized in that, in the first invention, the second urging means is disposed at a position that is substantially symmetrical with respect to the center of gravity of the rotating drum as viewed from above.

  According to the above configuration, the aquarium unit in which the rotating drum is accommodated in the aquarium is rotated by the second urging means supported substantially symmetrically with respect to the center of gravity with respect to the lateral vibration acting in the rotational direction at the center of gravity. The water tank unit is held at a predetermined position in the washing machine casing and vibrations in the rotation direction of the water tank unit can be suppressed, so that low vibration can be realized.

  According to a third aspect of the present invention, in the first and second aspects of the present invention, the second urging means is arranged so that the support position on the washing machine housing side is outside the support position on the rotary drum side when the rotary drum is viewed from above. It is characterized by being arranged at a position.

  According to the above configuration, in the water tank unit in which the rotating drum is accommodated in the water tank, the second urging means is moved from the support position on the washing machine housing side to the center of gravity of the rotating drum against the lateral vibration acting in the rotation direction at the center of gravity position. Since it supports in the direction, vibration in the rotation direction of the water tank unit can be more effectively suppressed, and low vibration can be realized.

  According to a fourth invention, in the first, second and third inventions, the second urging means is provided with components having different spring constant values.

  According to the above configuration, when the water tank unit in which the rotating drum is housed in the water tank is configured by arranging a drying unit or a water supply unit around the water tank unit, the position of the center of gravity of the water tank unit may be asymmetrical in the left-right direction. The force applied to becomes uneven. In that case, a large force is applied to the side where the center of gravity is biased, so the spring constant of the left and right springs of the second urging means is strengthened on the side where the center of gravity is biased, so that vibration in the rotational direction of the aquarium unit is more efficient. The vibration can be reduced.

  According to a fifth invention, in the first, second, third, and fourth inventions, the water tank unit is disposed in the washing machine casing so that the rotation axis of the rotary drum is inclined downward from the front side toward the back side. It is characterized by being arranged.

  According to the above configuration, in the water tank unit according to the first to fourth inventions, when the rotation axis of the rotating drum is disposed in the washing machine casing so as to be inclined downward from the front side toward the back side, The water tank unit can be elastically held at a predetermined position more effectively and low vibration can be realized.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the thing of the same structure as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits description. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
FIG.1, FIG.2, FIG.3 shows the support structure of the water tank unit 5 in the drum type washing machine 1 which concerns on embodiment. The water tank unit 5 accommodates the rotating drum 2 in the water tank 3, supports the rotating shaft 2a of the rotating drum 2 with a bearing 68 provided on the back surface of the water tank 3, and connects the drum drive motor 7 to the rotating shaft 2a. Configured. The aquarium unit 5 is disposed in the washing machine casing 6 so as to be inclined upward, and its weight is supported by a pair of left and right vibration damping dampers 70 attached to the base of the washing machine casing 6. ing. Since the aquarium unit 5 has heavy components such as the bearing 68 and the drum drive motor 7 attached to the back side thereof, the center of gravity position is closer to the back side, and the anti-vibration damper 70 places the aquarium unit 5 in the center of gravity position. It is supported below the front side. Further, a first coil spring (first biasing means) 71 is installed between the upper support fitting 75 fixed to the upper part of the water tank 3 and the upper surface of the washing machine housing 6, and the water tank unit 5 is connected to the front side and It is energizing upward. By installing the first coil spring 71, it is corrected that the water tank unit 5 supported by the vibration isolating damper 70 nearer to the front side than the position of the center of gravity falls into the back side.

  In addition to the first coil spring 71, a second coil spring (second urging means) is provided between the back surface of the water tank unit 5 below the support height position by the vibration damper 70 and the back surface of the washing machine housing 6. ) When 72 is installed, the state where the aquarium unit 5 falls to the back side is more reliably corrected. As shown in FIG. 3, the second coil spring 72 is installed at a plurality of locations 72 a and 72 b on the back surface of the washing machine housing 6 from a lower support fitting 74 fixed to the lower portion of the water tank 3, and the rotating drum 2. It is arrange | positioned in the substantially symmetrical position with respect to the rotating shaft 2a. By laying the second coil springs 72a and 72b, the second biasing means supports the oscillating direction evenly with respect to the lateral vibration acting in the rotating direction at the center of gravity position so that the second urging means supports substantially symmetrically with respect to the center of gravity. And the shaking in the rotation direction of the water tank unit 5 is suppressed.

  As shown in FIG. 4, the vibration damper 70 includes an oil damper mechanism 78 in which oil is sealed in a cylinder, and a coil spring mechanism 79 provided coaxially with the oil damper mechanism 78. The support shaft 84 fixed to the lower end of the mechanism 78 and having the coil spring mechanism 79 disposed on the outer periphery thereof is fixed to a support base 73 fixed to the base of the washing machine housing 6 via a cushioning material 77. Further, the piston rod 85 constituting the oil damper mechanism 78 is fixed to the lower support metal fitting 74 fixed to the lower part of the water tank 3 through the buffer material 77.

  As shown in FIG. 1, the rotating drum 2 is formed on the front side of the washing machine casing 6 because the rotating shaft direction is inclined with a downward inclination from the front side to the opening side toward the back side as the bottom surface. Opening the door body 9 that can be opened and closed on the inclined surface 6a is less likely to bend when the laundry is taken in and out of the rotary drum 2, and there is room on the front side of the drum-type washing machine 1. Therefore, it is possible to configure the drum type washing machine 1 that can be installed in a narrow space such as a washroom.

  As shown in FIG. 3, when the drying unit 61 and the water supply unit 62 are arranged on the upper surface of the water tank unit 5, the center of gravity of the water tank unit 5 is deviated from the rotating shaft 2 a of the rotating drum 2. In other words, the second coil springs 72a and 72b are not equally loaded. In such a case, the vibration in the rotation direction of the water tank unit can be more efficiently suppressed by increasing the spring constant of each of the second urging means 72a and 72b on the side where the center of gravity is biased. As a result, it is possible to reduce the vibration in the actual configuration.

(Embodiment 2)
The present invention is such that the second urging means is arranged on the outer side when the rotary drum is viewed from the upper surface with respect to the support position on the washing machine housing side with respect to the support position on the rotary drum side. Other configurations are the same as those of the first embodiment, and detailed description thereof is omitted.

  The operation and action of the second coil springs 72a and 72b configured as described above will be described. According to the above configuration, the second coil spring 72 is installed at a plurality of locations 72a and 72b on the back surface of the washing machine casing 6 from the lower support fitting 74 fixed to the lower portion of the water tub 3 as shown in FIG. In addition, the rotary drum 2 is disposed at a substantially symmetrical position with respect to the rotary shaft 2a. The support portions 8a and 8b on the back surface of the washing machine housing 6 are located on the outer side of the rotation axis with respect to the support portions 74a and 74b of the lower support fitting 74, and are biased toward the center of gravity of the water tank unit 5. .

  By the construction of the second coil springs 72a and 72b, the lateral vibration acting in the rotational direction at the center of gravity is more effectively corrected, and the shaking of the water tank unit 5 in the rotational direction is suppressed.

  As described above, the drum type washing machine according to the present invention supports the weight of the water tub unit containing the rotating drum by the anti-vibration damper at a position away from the center of gravity of the water tank unit and elastically urges the water tank unit to the predetermined position. The drum type that can effectively prevent the vibration accompanying the rotation of the rotating drum from being transmitted to the washing machine housing, and in particular, the drum type in which the aquarium unit is inclined so that the laundry can be taken in and out easily. This is an effective configuration in a washing machine.

Sectional drawing which shows the support structure in the drum type washing machine of Embodiment 1 of this invention Front view of the washing machine support structure Top view of the washing machine support structure Front view showing the configuration of a vibration damping damper applied to the washing machine support structure The top view which shows the support structure in the drum type washing machine of Embodiment 2 of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drum type washing machine 2 Rotating drum 3 Water tank 5 Water tank unit 6 Washing machine housing 7 Drum drive motor 70 Anti-vibration damper 71 1st coil spring (1st biasing means)
72a, 72b Second coil spring (second biasing means)
74 Lower support bracket 75 Upper support bracket

Claims (5)

A rotating shaft fixed to the center of the bottom surface of a bottomed cylindrical rotating drum disposed in a bottomed cylindrical water tank is supported by a bearing fixed to the bottom surface of the water tank, and the drum is driven to the rotating shaft. A water tank unit formed by connecting a motor is arranged in a washing machine casing, and the water tank unit is supported at a position closer to the front side than the center of gravity by a vibration-proof damper whose lower end is fixed to the base of the washing machine casing. And a first urging means for elastically urging the aquarium unit above the supporting height position by the vibration isolating damper to at least the front side, and at least below the supporting height position by the vibration isolating damper. A drum-type washing machine comprising a plurality of second urging means for elastically urging the back side. 2. The drum type washing machine according to claim 1, wherein the second urging means is disposed at a position that is substantially symmetrical with respect to the center of gravity of the rotating drum when viewed from above. 3. The second urging means according to claim 1, wherein the supporting position on the washing machine housing side is disposed at an outer position when the rotating drum is viewed from the upper surface with respect to the supporting position on the rotating drum side. Drum type washing machine. The drum type washing machine according to any one of claims 1 to 3, wherein the second urging means includes parts having different spring constant values. The drum-type washing according to any one of claims 1 to 4, wherein the aquarium unit is disposed in the washing machine casing such that the rotation axis of the rotating drum is inclined downward from the front side toward the back side. Machine.

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