JP2013070845A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine of which vibration control performance during startup of spin-drying is enhanced with damping means which exerts excellent damping effect in a plurality of directions.SOLUTION: Damping means 32 is provided between a bottom 33a of an outer tub 33 and a bottom 30a of a washing machine outer frame 30. The damping means is fixed to the bottom 30a of the washing machine outer frame 30 and includes a flexible bag body 32a enclosing liquid 32b therein, an agitator 32c housed in the bag body via a gap 32h provided between the agitator and an inner surface 32g of the bag body, and a connecting rod 32d which is inserted into the bag body and connects the agitator and the bottom of the outer tub. The washing machine is configured so that the agitator agitates the liquid by vibration of the outer tub, and the agitator is provided with stirring blades 42 and 43 to control vibrations in the plurality of directions of the outer tub.

Description

  The present invention relates to a washing machine for washing laundry such as clothes.

  Conventionally, this type of washing machine has been considered to increase the weight of the outer tub in order to suppress a large swinging motion of the outer tub during dehydration activation due to the eccentric load of the laundry (for example, Patent Documents). 1).

  FIG. 13 shows a configuration of a conventional washing machine described in Patent Document 1. In FIG. As shown in FIG. 13, a main body 1, an outer tub 3 elastically supported in the main body 1 by a suspension 2, a washing / dehydrating tub 4 rotating around a horizontal axis in the outer tub 3, and a washing / dehydrating tub A motor 5 that drives 4, a damper 6 provided between the lower part of the outer tub 3 and the bottom of the main body 1, and a tank 7 for suppressing oscillating motion that accumulates water according to the degree of vibration of the outer tub 3. The tank 7 is filled with water at the time of dehydration activation, and a large swinging motion at the time of dehydration activation is suppressed by the weight of the water filled in the tank 7.

  In addition, it is considered that the vertical movement of the outer tub is suppressed by an oil damper (see, for example, Patent Document 2).

  FIG. 14 shows a configuration of a damper of a conventional washing machine described in Patent Document 2. As shown in FIG. As shown in FIG. 14, an oil damper lever 12 is connected to the hanging rod 11. Silicone oil is enclosed in a damper chamber 15 formed by the damper case 13 and the damper base 14. When the outer tub vibrates and the hanging rod 11 vibrates in the vertical direction, the oil damper lever 12 is interlocked with the hanging rod 11 and the blade portion 16 in the damper chamber 15 rotates, and the silicon oil sealed in the damper chamber 15 It is designed to be braked.

JP-A-5-131075 JP-A-5-84391

  However, the conventional configuration requires a water supply device for filling the tank 7 with water and a drainage device for draining, and there is a problem that the configuration is complicated and the cost is high. Also, the piping for water supply and drainage generates noise due to vibration during dehydration, and also when the vibration suppression effect is obtained by utilizing the vibration energy of water without filling the tank 7 with water, There was a problem that vibration sound of water was generated. Moreover, when the eccentric load of the laundry is large, it is necessary to enlarge the tank 7 to increase the amount of water, and there is a limit to the eccentric load of the laundry that can be handled in a limited space.

  Further, the swinging of the outer tub is not only in the vertical direction, but is complicated including the horizontal direction and the rotation direction thereof, and there is a problem that it cannot be solved only by vibration control in the vertical direction.

  An object of the present invention is to solve the above-mentioned conventional problems, and to provide a washing machine equipped with damping means that exhibits a damping effect in a plurality of directions of an outer tub and has improved damping performance at the start of dehydration. And

  In order to solve the conventional problems, the washing machine of the present invention is provided with a damping means between the bottom of the outer tub and the bottom of the washing machine outer frame, and the damping means is provided at the bottom of the washing machine outer frame. A flexible bag body that is fixed and encloses a liquid therein, a stirring body that is housed in a space between the bag body and an inner surface of the bag body, and inserted into the bag body A connecting rod connecting the stirring body and the bottom of the outer tub, and the stirring body is configured to stir the liquid by swinging the outer tub; A stirring blade that suppresses rocking is provided.

  As a result, the outer tank is prevented from swinging by the resistance generated when the stirrer stirs the liquid in the bag against the swinging of the outer tank at the start of dehydration. The effect can be demonstrated.

  The washing machine of the present invention can accurately and efficiently suppress the swinging of the outer tub in a plurality of directions, and can improve the vibration damping performance at the time of dehydration activation.

Sectional drawing of the principal part of the washing machine in Embodiment 1 of this invention Sectional view of damping means of the washing machine Sectional view of damping means of the washing machine AA sectional view of the washing machine in FIG. Sectional view of damping means of the washing machine Sectional drawing of the damping means of the washing machine in Embodiment 2 of this invention Sectional view of damping means of the washing machine Sectional drawing of the damping means of the washing machine in Embodiment 3 of this invention Sectional view of damping means of the washing machine Sectional drawing of the damping means of the washing machine in Embodiment 4 of this invention Sectional view of damping means of the washing machine Sectional drawing of the principal part of the washing machine in Embodiment 5 of this invention Cross section of the main part of a conventional washing machine Configuration diagram of an oil damper of another conventional washing machine

  According to a first aspect of the present invention, there is provided an outer tub suspended by an elastic body provided on an upper part of a washing machine outer frame, a washing / dehydrating tub provided rotatably in the outer tub, and the washing / dehydrating tub Drive means for rotating, and damping means provided between the bottom of the outer tub and the bottom of the washing machine outer frame, the damping means being fixed to the bottom of the washing machine outer frame, A flexible bag enclosing a liquid; a stirrer housed in the bag body with a gap between the inner surface of the bag body; and the stirrer inserted into the bag body and the outer A stirrer having a connecting rod for connecting the bottom of the tank, and configured so that the stirring body stirs the liquid by swinging the outer tank, and the stirring body suppresses swinging of the outer tank in a plurality of directions. By providing wings, the stirring body is a bag body against the swinging of the outer tank up and down, left and right and rotation direction at the start of dehydration. It can be a liquid to suppress swinging of the outer tub in the resistance force generated when agitating the exert vibration damping effect compact efficiently in a plurality of directions.

  In the second invention, in particular, the stirrer of the first invention has a first stirring blade that generates resistance in a rotational direction around the connecting rod, and a second that generates resistance in a direction in which the connecting rod extends. By having the stirring blades, it is possible to effectively obtain resistance against the swinging of the outer tub in the upper and lower sides and the rotation direction of the outer tub at the time of dehydration activation, and it is possible to effectively suppress the swinging.

In the third invention, in particular, the second stirring blade of the second invention is provided so as to be orthogonal to the lower end portion of the first stirring blade. The stirring blade is inclined, and the resistance force is increased accordingly, and the deterring force of the outer tank can be improved.

  In the fourth invention, in particular, the bag body of the first invention is formed in a spherical shape, and the stirring blade is formed in an arc shape along the inner surface of the bag body, thereby stirring the inner surface of the bag body. Since the gap between the blades is kept almost constant even when the stirring blade is displaced, the generated resistance can be stabilized.

  In the fifth aspect of the invention, in particular, the bag of the first aspect of the invention has a cylindrical shape in which the bottom portion protrudes outward in a hemispherical shape, and the lower end of the first stirring blade has an arc shape along the bottom portion. By forming the gap, the gap between the bottom surface of the bag body and the stirring blade is kept substantially constant even if the stirring blade is rotationally displaced or tilted, and thus the generated resistance can be stabilized.

  In the sixth invention, in particular, the stirring body according to any one of the first to fifth inventions is positioned at a substantially central portion of the bag body in a stationary state in which the predetermined laundry is accommodated in the washing and dewatering tub. By comprising, the braking force at the time of laundry loading with a large rocking | fluctuation of an outer tub can be obtained reliably.

  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 cross-sectional view of the main part of the washing machine according to the first embodiment of the present invention, FIGS. 2 and 3 are cross-sectional views of the damping means of the washing machine, and FIG. FIG. 5 and FIG. 5 are sectional views of damping means of the washing machine.

  1 to 5, the washing machine outer frame 30 elastically supports an outer tub 33 with four elastic bodies 31 and one damping means 32. The washing / dehydrating tub 34 is rotatably disposed in the outer tub 33. The motor (driving means) 35 is composed of a brushless DC motor, is controlled by an inverter, and the rotational speed can be freely changed, and rotationally drives the washing / dehydrating tub 34. The water supply means 36 supplies washing water into the washing / dehydrating tub 34. The water level detection means 37 detects the washing water level in the outer tub 33. The drainage means 38 drains the washing water in the outer tub 33 to the outside of the machine.

  The control device 39 is provided at the lower front portion of the washing machine outer frame 30. The control device 39 sequentially controls each step of washing, rinsing, and dehydrating based on the setting contents input by the operation display means 40 provided on the upper front surface of the washing machine outer frame 30. The power switching means ( The motor 35, the water supply means 36, the drainage means 38, etc. are sequentially controlled via a not-shown).

  The damping means 32 is for reducing the resonance vibration amplitude of the outer tub 33 at the start of dehydration, and is fixed between the bottom 30 a of the washing machine outer frame 30 and the bottom 33 a of the outer tub 33. The damping means 32 is composed of a viscous damper using oil as a working fluid, and a flexible rubber bag body 32a and a liquid 32b provided in the bag body 32a and sealed in the bag body 32a. A stirrer 32c that stirs and a connecting rod 32d that connects the stirrer 32c and the bottom 33a of the outer tub 33 are provided.

  A liquid having a high viscosity such as silicon oil is used for the liquid 32b. The stirrer 32c is provided with a first stirrer blade 42 and a second stirrer blade 43 serving as a stirrer blade that suppresses the swinging of the outer tub 33 in a plurality of directions, and the resistance force generated by the agitation is increased. To be able to.

The first stirring blades 42 are radially formed in the bag body 32a around the connecting rod 32d, and are provided in a plate shape having a predetermined height in the vertical direction. The second stirring blade 43 is connected to the first stirring blade 42.
It is provided in a plate shape in the horizontal direction orthogonal to the horizontal axis. A gap 32h is formed between the peripheral edge portion 32e of the first stirring blade 42 and the second stirring blade 43 and the inner surface 32g of the bag body 32a. The legs 44 that support the washing machine outer frame 30 are made of an elastic material such as rubber, and are disposed at the four corners of the bottom 30 a of the washing machine outer frame 30.

  About the washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. First, after putting laundry B (hereinafter referred to as clothing) such as clothes and detergent into the washing and dewatering tub 34, the operation display means 40 is operated to start operation. As a result, the water supply means 36 operates, the washing water is supplied into the washing / dehydrating tub 34, and the washing / dehydrating tub 34 also starts rotating. When a specified amount of washing water set in accordance with the amount of clothes put in is supplied, the water supply means 36 stops water supply. By the rotation of the washing and dewatering tub 34, the detergent is dissolved in the washing water and becomes a washing liquid and penetrates into the clothes.

  The washing and dewatering tub 34 rotates at a low speed of 30 to 50 r / min, and performs washing for a specified time of lifting and dropping clothes. After the washing is finished, the drainage means 38 is operated, and the washing water in which the dirt is dissolved is drained out of the outer tub 33. After the drainage is completed, the rotation of the washing and dewatering tub 34 is gradually accelerated and the dehydration process is started.

  After the dehydration is started, when the rotation speed of the washing / dehydrating tub 34 increases to near 120 r / min, if the clothes in the washing / dehydrating tub 34 is unbalanced, the outer tank 33 is moved in the left-right direction by the first resonance ( Vibrates greatly in the direction of arrow b). The vibration tends to greatly vibrate the stirring body 32c in the left and right direction (arrow B direction) and the rotation direction (arrow C direction) about the connecting rod 32d via the connecting rod 32d. The left and right vibrations of the outer tub 33 are reduced by the resistance generated when the first stirring blade 42 and the second stirring blade 43 constituting the stirring blade provided in the body 32c stir the liquid 32b. The tank 33 passes through the first resonance without greatly shaking from side to side.

  When the number of rotations of the washing and dewatering tub 34 is increased to about 250 r / min, the front portion of the outer tub 33 is vibrated greatly in the vertical direction (in the direction of the arrow D) by the second resonance. The vibration tends to greatly vibrate the stirring body 32c through the connecting rod 32d in two directions, ie, in the vertical direction and in the rotation direction (arrow E direction) about the connecting portion 32f of the connecting rod 32d and the bag 32a. However, the first stirring blade 42 constituting the stirring blade provided in the stirring body 32c and the resistance force generated when the second stirring blade 43 stirs the liquid 32b in the vertical direction of the front portion of the outer tank 33. The vibration is reduced, and the front portion of the outer tub 33 passes through the second resonance without greatly shaking up and down.

  When the number of rotations of the washing and dewatering tub 34 rises to around 350 r / min, the entire outer tub 33 vibrates greatly in the vertical direction due to the third resonance. The vibration tends to greatly vibrate the stirring body 32c in the vertical direction via the connecting rod 32d, but the first stirring blade 42 and the second stirring blade 43 provided on the stirring body 32c stir the liquid 32b. The vertical vibration of the entire outer tub 33 is reduced by the resistance force generated when the outer tub 33 is moved, and the entire outer tub 33 passes through the third resonance without being greatly shaken up and down.

  Thereafter, the rotation speed of the washing and dewatering tub 34 is further increased to a steady dewatering rotation speed (1000 r / min). Since the vibration of the outer tub 33 is reduced and the vibration of the stirring body 32c is reduced at the steady dehydration rotational speed, the resistance generated when the first stirring blade 42 and the second stirring blade 43 are stirring the liquid 32b. The vibration force transmitted to the bottom portion 30a of the washing machine outer frame 30 via the damping means 32 is also reduced, so that the vibration of the washing machine outer frame 30 is at a low level.

The stirrer blade provided on the stirrer 32c that stirs the liquid in the bag 32a generates a resistance in the rotation direction (in the direction of the arrow) around the connecting rod 32d by the first stirrer blade 42 provided in the vertical direction. The second stirring blade 4 in which the resistance in the direction in which the connecting rod 32d extends (in the direction of arrow G) is provided in the horizontal direction.
3, and the swinging of the outer tub 33 in the rotation direction in the upper, lower, left and right directions at the start of dehydration can be efficiently suppressed.

  As described above, in the present embodiment, the damping means 32 is provided between the bottom 33 a of the outer tub 33 and the bottom 30 a of the washing machine outer frame 30, and the damping means 32 is provided on the bottom 30 a of the washing machine outer frame 30. A flexible bag body 32a that is fixed and encloses a liquid 32b inside, a stirrer body 32c that is accommodated inside the bag body 32a with a gap 32h between the inner surface 32g of the bag body, and a bag body 32a. The connecting rod 32d is inserted into the connecting body 32c and connects the bottom 33a of the outer tub 33. The stirrer 32c is configured to stir the liquid 32b when the outer tub 33 is swung. Agitating blades 42 and 43 are provided to suppress the swaying of the tank 33 in a plurality of directions, and the swaying of the outer tub 33 in a plurality of directions at the start of dehydration can be suppressed in a compact and efficient manner with a simple configuration. Can do.

(Embodiment 2)
6 and 7 are sectional views of the attenuating means according to the second embodiment of the present invention. The feature of the present embodiment is that the second stirring blade 43 is provided so as to be orthogonal to the lower end portion 42 a of the first stirring blade 42. Other configurations are the same as those of the first embodiment, the same reference numerals are given to the same configurations, and the detailed description of the first embodiment is used.

  Thereby, when the outer tub 33 is inclined, the inclination of the second stirring blade 43 with the connecting rod 32d and the connecting portion 32f of the bag body 32a as an axis can be increased, and the resistance force is increased accordingly. The deterring power of the inclination of the tank 33 can be improved.

(Embodiment 3)
8 and 9 are cross-sectional views of the attenuating means according to the third embodiment of the present invention. The feature of the present embodiment is that the bag body 32a is formed in a substantially spherical shape, and the first stirring blade 42 and the peripheral edge portion 32e of the second stirring blade 43 provided on the stirring body 32c are arranged along the inner surface 32g of the bag body. It is formed in an arc shape. Other configurations are the same as those of the first embodiment, the same reference numerals are given to the same configurations, and the detailed description of the first embodiment is used.

  As a result, the gap 32h formed between the peripheral edge portion 32e of the first stirring blade 42 and the second stirring blade 43 and the inner surface 32g of the bag body is the first stirring blade 42 and the second stirring blade. 43 is maintained constant even if it rotates in the direction of the arrow H with the connecting rod 32d and the connecting portion 32f of the bag body 32a as an axis, and the gap 32h has a predetermined length along the inner surface 32g of the bag body. Thus, the change in the stirring resistance of the stirrer 32c is reduced, and the vibration suppressing effect of the damping means 32 can be stabilized.

(Embodiment 4)
10 and 11 are sectional views of the attenuating means according to the fourth embodiment of the present invention. The feature of the present embodiment is that the bag body 32a has a cylindrical shape with the bottom formed in a hemispherical shape, protrudes downward from the bottom 30a of the washing machine outer frame 30, and the lower end 42a of the first stirring blade 42 Is formed in an arc shape along the bottom of the bag body 32a. Other configurations are the same as those of the first embodiment, the same reference numerals are given to the same configurations, and the detailed description of the first embodiment is used.

  Thereby, even if the 1st stirring blade 42 rotates centering around the connection part 32d and the connection part 32f of the bag body 32a, the clearance gap between the lower end 42a of the 1st stirring blade 42 and the inner surface 32g of the bag body 32a 32h is kept constant, and the gap 32h, which is the flow path of the liquid 32b, is formed constant, so that the change in the stirring resistance of the first stirring blade 42 is reduced, and the vibration of the damping means 32 is suppressed. The effect can be further stabilized.

(Embodiment 5)
FIG. 12 is a cross-sectional view of a main part of a washing machine according to the fifth embodiment of the present invention. The feature of the present embodiment is that the agitating body 32c of the damping means 32 is positioned substantially at the center of the bag body 32a in a stationary state in which the predetermined laundry B is accommodated in the washing and dewatering tub 34. It is. Other configurations are the same as those of the first embodiment, the same reference numerals are given to the same configurations, and the detailed description of the first embodiment is used.

  Thereby, the gap 32h between the first stirring blade 42 and the second stirring blade 43 constituting the stirring body 32c and the inner surface 32g of the bag body 32a can be configured uniformly, and what the outer tub 33 is like Even if it swings in the direction, the damping means 32 can exert a damping effect. Therefore, it is possible to reliably obtain a braking force when the laundry is thrown in which the outer tub 33 swings greatly.

  As described above, the washing machine according to the present invention can effectively and efficiently suppress the swinging of the outer tub in a plurality of directions, and can improve the vibration control performance at the start of dehydration, and thus is useful as a washing machine. It is.

DESCRIPTION OF SYMBOLS 30 Washing machine outer frame 30a Bottom part of washing machine outer frame 31 Elastic body 32 Damping means 32a Bag body 32b Liquid 32c Stirring body 32d Connecting rod 32g Inner surface of bag body 32h Gap 33 Outer tank 33a Bottom part of outer tank 34 Washing / dehydration tank 35 Motor (drive means)
42 1st stirring blade (stirring blade)
43 Second stirring blade (stirring blade)

Claims (6)

An outer tub suspended by an elastic body provided at an upper part of the outer frame of the washing machine, a washing / dehydrating tub rotatably provided in the outer tub, and a driving means for rotating the washing / dehydrating tub, A damping means provided between the bottom of the outer tub and the bottom of the outer frame of the washing machine, the damping means being fixed to the bottom of the outer frame of the washing machine and having a flexible liquid sealed inside A flexible bag body, a stirrer housed in the bag body with a gap between the inner surface of the bag body, and inserted into the bag body to connect the stirrer and the bottom of the outer tub A washing machine having a connecting rod, wherein the stirrer stirs the liquid by swinging the outer tub, and the stirrer is provided with a stirring blade that suppresses swinging of the outer tub in a plurality of directions . The washing machine according to claim 1, wherein the stirring body includes a first stirring blade that generates resistance in a rotation direction around the connecting rod, and a second stirring blade that generates resistance in a direction in which the connecting rod extends. . The washing machine according to claim 2, wherein the second stirring blade is provided so as to be orthogonal to a lower end portion of the first stirring blade. The washing machine according to claim 1, wherein the bag body is formed in a spherical shape, and the stirring blade has an arcuate edge formed along the inner surface of the bag body. The washing machine according to claim 1, wherein the bag body has a cylindrical shape with a bottom portion protruding outward in a hemispherical shape, and a lower end of the first stirring blade is formed in an arc shape along the bottom portion. The washing machine according to any one of claims 1 to 5, wherein the stirrer is configured to be positioned at a substantially central portion of the bag body in a stationary state in which predetermined laundry is accommodated in the washing and dewatering tub.