WO2015180478A1

WO2015180478A1 - Clothes washing machine

Info

Publication number: WO2015180478A1
Application number: PCT/CN2014/095879
Authority: WO
Inventors: 广濑彻; 中本重阳
Original assignee: 海尔亚洲国际株式会社; 青岛海尔洗衣机有限公司
Priority date: 2014-05-27
Filing date: 2014-12-31
Publication date: 2015-12-03
Also published as: JP2015223284A

Abstract

Provided is a clothes washing machine that not only appropriately suppresses the vibration of the outer tub, but also prevents the damage to the outer tub without compromising the design freedom of the outer tub. The clothes washing machine has an elastic support device (5) that elastically supports an outer tub (3) relative to a main body (2), and comprises: compression coil springs (54), provided at multiple positions around a rotation shaft (Ra) of a washing and dewatering tub (4) disposed between the outer tub (3) and the main body (2), that when compressed and being pressurized (Fp) have one end (61a) connected with the outer surface (32a) of the outer tub (3) and another end (61b) placed opposite the inner surface (21a) of the main body (2) with a gap (E) therebetween; a limiting cord (62) that uses the pressurized (Fp) state as a bench, allows the other end (61b) to displace toward the compression direction, and limits the displacement toward the extension direction.

Description

washing machine

Technical field

The present invention relates to a washing machine capable of suppressing vibration when a washing and dewatering tank is rotated.

Background technique

At present, a washing machine having a structure in which a cylindrical outer tank is supported inside a main body formed in a box shape and a washing and dewatering tank as an inner tank is rotatably supported inside the outer tank ( For example, refer to Patent Document 1).

In such a general washing machine, the outer groove is elastically supported on the main body at four locations via a suspension including a spring and a hanger hanging thereon, thereby suppressing vibration during operation.

In the case of such a configuration, the number of low-order natural vibrations of the vibration mode in which the outer groove vibrates around the rotation axis of the washing and dewatering tank occurs in a region lower than the rotation speed of the washing and dewatering tank. Specifically, a pulsator (agitating blade) is provided at the bottom of the washing and dewatering tank, and the washing and dewatering tank and the pulsator are integrally rotated at a high speed inside the outer tank at the time of dehydration. When the rotation of the washing and dewatering tank is started to increase the speed, if the rotation speed of the washing and dewatering tank coincides with the number of the low-order natural vibrations described above, the vibration temporarily increases. As the rotation speed of the washing and dewatering tank is further increased, the number of low-order natural vibrations is removed, and the vibration is reduced, so that the rotation speed can be stably operated at the set rotation speed.

However, it is also considered that when the laundry entering the washing and dewatering tank is biased and the amount of unwinding around the rotating shaft is large, the vibration of the outer tank is increased, particularly in the case of low-order natural vibration, the outer tank vibrates greatly and the main body The internal abutment. Moreover, since the washing machine as a whole generates large noise and vibration, the environment around the installation place of the washing machine is deteriorated, and the components constituting the washing machine may be damaged.

In order to suppress the above-mentioned defects, it is generally considered to have a certain gap between the outer groove and the main body to reduce the collision between the outer groove and the main body. In addition, it is also considered to control the rotation to stop or correct the deviation of the laundry when an excessive vibration is detected.

However, when there is a certain gap or more between the outer tub and the main body, the outer tub has to be miniaturized as compared with the main body, and a large dead zone is required inside the main body. Further, when the vibration countermeasure is performed by the control, the vibration detecting device and the complicated control are required, resulting in an increase in cost.

Therefore, in order to solve the above problem, it is conceivable to use the technique described in Patent Document 2 below. Patent Document 2 discloses a configuration in which a coaxial configuration is performed in a state where a clearance is provided outside the outer tank of the washing machine. A ring is provided on the outer side of the ring (see paragraphs 0094, 0095 and Figs. 19D, 19E). The leaf spring is held by the stopper in a state where the pressure is applied to the displacement in advance, and when the displacement is shifted to the above and the restriction of the stopper disappears, a large spring force including the amount of pressurization can be applied.

Therefore, in the technique described in Patent Document 2, when the rotational speed of the washing and dewatering tank is close to the number of low-order natural vibrations, and the outer tank vibrates largely and abuts against the ring, the outer groove is elastically supported not only by the spring included in the suspension, Further, the state in which the leaf spring provided on the ring is elastically supported can reduce the vibration by changing the number of low-order natural vibrations.

Prior art literature

Patent literature

Patent Document 1: Japanese Laid-Open Patent Publication No. 2011-240041

Patent Document 2: Japanese Patent No. 3984630

Problem to be solved by the invention

In order to reduce the weight of the washing machine and reduce the manufacturing cost, the outer tank is generally formed of a resin. Therefore, in the case of combining with the structure of the above-mentioned Patent Document 2, the outer tub of the washing machine may be worn and damaged due to contact with the annular body. Further, the outer tub of the washing machine has a degree of freedom in designing a mounting portion for forming a rib, a wiring, and/or a pipe for imparting strength, and the outer peripheral surface is often formed into a complicated shape in combination with a required pattern. However, in the case of adopting the configuration of Patent Document 2 described above, in order to allow the outer circumference of the outer groove and the annular body to be smoothly contacted, since the shape of the outer peripheral surface of the outer groove is limited to a circular shape, the degree of freedom in design is lowered. Increased development costs.

Summary of the invention

SUMMARY OF THE INVENTION An object of the present invention is to effectively solve such a problem, and in particular, to provide a washing machine which can not only appropriately suppress vibration of an outer groove, reduce a gap between an outer groove and a main body, but also reduce the design of the outer groove. The degree of freedom is suppressed to the damage of the outer groove.

Solution to solve the problem

In order to achieve the object, the present invention has adopted the following scheme.

In other words, the washing machine of the present invention includes: a main body in which an internal space is formed, an outer groove disposed in an internal space of the main body, an inner groove disposed inside the outer groove and rotatably supported, and disposed in the outer groove An electric motor that rotates the inner groove, and an elastic support device that elastically supports the outer groove with respect to the main body, wherein an elastic body is disposed between the outer groove and the main body a plurality of positions around the rotation axis of the inner groove, and one end is provided in a state of being pressurized by compression The outer surface of the outer groove is connected and the other end is opposed to the inner surface of the main body via a gap; and the displacement restricting means allows the other end to be displaced in the compression direction and restricted by giving the pressed state as a reference Displaces in the direction of elongation.

Further, the present invention is characterized in that at least a pair of the elastic bodies are disposed along a first direction crossing the rotation axis and sandwiching the outer groove, and along the rotation axis and the first direction At least one pair of the elastic bodies are disposed in a second direction of the intersection and sandwiching the outer groove.

Further, the present invention is characterized in that an inner space formed in the main body is substantially rectangular parallelepiped, and the outer groove is substantially in a bottomed cylindrical shape, an elastic body disposed along the first direction and along the second The elastic bodies disposed in the direction are respectively grouped one by one, and are disposed close to the corners of the inner space.

Then, the present invention is characterized in that an abutting portion formed in a convex shape toward the inner surface of the main body is provided at the other end of the elastic body, and the abutted portion is provided on the inner surface of the main body, so that The abutting portion and the abutted portion are opposed to each other, and the abutting portion is formed in an arc shape centering on an axis passing through the tip end of the abutting portion and parallel to the rotating shaft.

Further, the present invention is characterized in that an abutting portion is provided at the other end of the elastic body, and an abutting portion is provided on an inner surface of the main body such that the abutting portion and the abutted portion In the opposing manner, the abutting portion is formed in an arc shape centering on the axis parallel to the rotation axis, and the abutting portion is formed in an arc shape centering on the same axis as the abutting portion.

Further, the present invention is characterized in that the other end of at least two elastic bodies is connected to the abutting portion.

Effect of the invention

According to the invention as described above, when the inner groove is rotated by the motor, when the outer groove is largely rotated by bringing the rotation speed close to the natural vibration number of the outer groove, the elastic body provided on the outer circumference of the outer groove It is in contact with the inside of the main body, so that the natural vibration number can be changed to reduce the vibration.

Specifically, the number of natural vibrations of the vibration mode of the outer groove swirl depends on the elastic support strength (spring constant) of the elastic support device supporting the outer groove, and the outer groove is largely swirled by the rotation speed close to the natural vibration number. In a vibrating manner, the elastic body provided on the outer circumference of the outer groove is in contact with the inside of the main body. The elastic body is restricted by the displacement restricting means to give a pressurized state. When the elastic body is compressed in contact with the inside of the main body, the elastic support strength of the outer groove is sharply changed by releasing the restriction of the displacement restricting means, so that the outer groove can be made The number of natural vibrations changes. Therefore, the vibration of the outer groove can be reduced, and the inner groove can be further accelerated to a predetermined rotation frequency.

In this way, the vibration caused by the natural vibration number of the outer groove can be reduced before the amplitude becomes excessively large, and the inner groove can be increased to a predetermined rotation speed. Therefore, noise and vibration can be prevented, and the environmental evil at the installation place can be suppressed. Chemical. Further, since the elastic body is provided in the outer groove, damage to the outer groove can be prevented, and the stability of the operation can be further improved. Further, since the design freedom of the outer surface of the outer tank is maintained high only by the fact that the elastic body can be attached, the development cost is not increased.

In particular, according to the present invention in which the elastic body is provided along the first direction and the second direction, since the elastic body is disposed at least in a pair so as to sandwich the outer grooves in the two directions intersecting each other, The management of the gap between the inner surface of the main body and the other end of the elastic body is facilitated, the degree of freedom in design is improved, and the structure in which the outer groove and the elastic body are brought into contact via the elastic body can be easily realized.

In particular, according to the present invention in which the elastic body is provided close to the corner portion of the internal space, by providing the elastic body close to the corner portion of the internal space formed into a substantially rectangular parallelepiped shape, it is possible to effectively utilize the interior which is easy to become a useless space. The space between the space and the outer groove can be further miniaturized. Further, in the case where the outer groove is subjected to the whirling vibration, even when the outer ring is displaced in the rotational direction, the other end of the elastic body can be brought into contact with the inner surface of the main body, so that the outer groove is caused by the uneven rotation of the motor or When the torque fluctuates and vibrates in the rotational direction, the vibration can be appropriately suppressed.

Further, according to the present invention in which the convex abutting portion and the abutted portion opposed thereto are provided, a convex abutting portion is provided at the other end of the elastic body, and is disposed on the inner surface of the main body to pass through the front end thereof and When the abutting portion and the contacted portion are opposed to each other, the abutting portion and the abutted portion are opposed to each other with the axis of rotation of the inner groove parallel to the axis of the axis, and the abutting portion of the inner groove can smoothly abut The portion is in contact with the abutted portion, so that the vibration can be appropriately reduced.

Further, according to the present invention in which the abutting portion formed in an arc shape and the abutted portion opposed thereto are provided, an arc-shaped abutting portion is provided at the other end of the elastic body, and the inner surface of the main body is provided with abutting The abutting portion and the abutted portion having the concentric arc shape are opposed to each other, whereby the abutting portion and the abutted portion can be smoothly contacted when the whirling vibration of the outer groove occurs. Therefore, the vibration can be appropriately reduced.

In particular, according to the present invention in which the other end of the at least two elastic bodies is connected to the abutting portion, the vibration can be more appropriately reduced by smoothly switching the acting elastic body in accordance with the change in the displacement direction of the outer groove.

DRAWINGS

Fig. 1 is a longitudinal sectional view showing a washing machine according to a first embodiment of the present invention.

Fig. 2 is a cross-sectional view taken along line A-A of Fig. 1;

Fig. 3 is an explanatory view showing a second elastic supporting device in the washing machine.

Fig. 4 is an explanatory view schematically showing a force acting on an outer tub of the washing machine.

Fig. 5 is an explanatory view for explaining a relationship between a force acting on the outer groove and a displacement.

Fig. 6 is a longitudinal sectional view showing a first modification of the washing machine of the first embodiment.

Fig. 7 is a longitudinal sectional view showing a second modification of the washing machine of the first embodiment.

Fig. 8 is a transverse cross-sectional view showing a washing machine in accordance with a second embodiment of the present invention.

Fig. 9 is a transverse cross-sectional view showing a modification of the washing machine of the second embodiment.

Fig. 10 is an explanatory view showing a washing machine in a third embodiment of the present invention.

Fig. 11 is an explanatory view showing the structure of an elastic unit in the washing machine.

Fig. 12 is a transverse cross-sectional view showing a modification of the washing machine of the third embodiment.

FIG. 13 is an explanatory view showing a configuration of a washing machine in a fourth embodiment of the present invention.

Fig. 14 is a transverse cross-sectional view showing a first modification of the washing machine of the fourth embodiment.

Fig. 15 is a transverse cross-sectional view showing a second modification of the washing machine of the fourth embodiment.

Fig. 16 is a transverse cross-sectional view showing a third modification of the washing machine of the fourth embodiment.

Fig. 17 is an explanatory view showing a washing machine in accordance with a fifth embodiment of the present invention.

detailed description

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)

1 is a longitudinal cross-sectional view showing a washing machine 1 (1A) according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line A-A of FIG. The washing machine 1 shown in Figs. 1 and 2 has a schematic configuration, and a portion that is not related to the present invention is omitted.

The washing machine 1 includes a main body 2, an outer tub 3, a washing and dewatering tank 4 as an inner tub, and elastic support devices 5 to 5.

Here, in the present embodiment and other embodiments to be described later, the width direction of the main body 2 is defined as the x direction, the depth direction is defined as the y direction, and the vertical direction is defined as the z direction. These x, y, and z directions are orthogonal to each other to form a coordinate system as shown in the drawing. Hereinafter, the description will be made based on the coordinate system.

The main body 2 includes an internal space 2a which is formed in a substantially rectangular parallelepiped shape in which the lower plate 22 having a substantially square shape in plan view and the side plates 21 to 21 which are formed on the four sides from the edge portion and the upper plate 23 connected to the upper portion thereof are integrally formed. By forming a substantially rectangular parallelepiped shape by being surrounded by them.

The side plates 21 and the lower plate 22 are formed of a metal plate, and the upper plate 23 is formed of a resin. The lower plate 22 has legs 22a to 22a which can provide the main body 2 on the floor surface near the four corners below. A substantially circular opening 23a through which the laundry can be discharged into the washing and dewatering tank 4 is provided on the upper plate 23. Further, the upper plate 23 can be detached from the side plate 21, whereby the outer groove 3 can be easily fitted into the inner space 2a of the main body 2. In addition, the upper plate 23 It is also possible to be integrally formed with an operation panel for performing the operation of the washing machine 1.

The outer tub 3 is molded of a heat-resistant synthetic resin, and is a bottomed cylindrical member having a bottom plate 31 that is substantially circular in plan view and a side plate 32 that rises from the edge of the bottom plate 31. The outer tub 3 is suspended by the elastic support device 5 in the inner space 2a of the main body 2, and the engaging portion 33 for attaching the elastic supporting device 5 is provided at four portions of the lower portion of the side plate 32.

The washing and dewatering tank 4 is made of metal and is a bottomed cylindrical member having a bottom plate 41 that is substantially circular in plan view and a side plate 42 that rises from the edge of the bottom plate 41. The washing and dewatering tank 4 is disposed coaxially with the outer tank 3 inside the outer tank 3, and is rotatably supported by the outer tank 3. A plurality of openings (not shown) are provided in the side plates 42 and the bottom plate 41, and the water in the washing and dewatering tank 4 can be discharged through the openings.

The washing and dewatering tank 4 is rotated by the motor 34 to rotate the drive shaft 35 that extends toward the upper surface side of the bottom plate 31. In addition, the rotational force generated by the motor 34 also applies a driving force to the pulsator (agitating blade) 43 provided at the center of the bottom plate 41 of the washing and dewatering tank 4 via a transmission device (not shown) to rotate the pulsator 43. Therefore, the washing machine 1 can mainly rotate only the pulsator 43 at the time of washing, and the washing and dewatering tank 4 and the pulsator 43 can be integrally rotated at high speed during dehydration.

The center of the rotation of the pulsator 43 and the center of the rotation of the washing and dewatering tank 4 are set to the same rotation axis Ra parallel to the Z axis. Further, the rotation axis Ra also passes through the center of the bottom plate 41 of the washing and dewatering tank 4 and the center of the bottom plate 31 of the outer tank 3.

The elastic support devices 5 to 5 suspend the outer groove 3. In the present embodiment, four elastic support devices 5 to 5 are provided, and each of them is composed of a boom 51 and a suspension 52 attached to the front end thereof. The suspension 52 has an outer cylinder 53 and a compression coil spring 54 disposed inside thereof. In the main body 2, the boom attachment portions 24 to 24 are provided in the vicinity of the upper plate 23 of the four corners 2a1 to 2a1 (see FIG. 2) of the internal space 2a, and the boom 51 is attached to each of the boom attachment portions 24 to 24. Base side. Further, the outer cylinder 53 of the suspension 52 is engaged with the engaging portion 33 in a form of being caught by the engaging portion 33 of the outer tub 3. Thus, the outer tub 3 is suspended in the inner space 2a by the four elastic supporting means 5 to 5.

The compression coil spring 54 of each elastic supporting device 5 is compressed by the weight of the outer groove 3 to generate a reaction force, and elastically supports the outer groove 3 while absorbing the displacement. Further, the four elastic supporting devices 5 to 5 respectively suspend the outer tub 3 from the oblique direction, thereby cooperatively achieving the function of maintaining the balance of the outer tub 3 in the center direction of the main body 2.

That is, the elastic supporting device 5 can obtain not only the elasticity of the compression coil spring 54 of the suspension 52 but also the restoring force for returning the center of the suspended outer groove 3 just like the vibrator by its positional relationship. Therefore, the outer groove 3 is displaced by the elastic support device 5 in the case of displacement from the center position in the x direction or the y direction. A restoring force corresponding to the displacement amount is obtained, and is returned to the center position of the main body 2 by the restoring force.

Here, as described above, by elastically supporting the outer tub 3 by the elastic supporting device 5, the number of low-order natural vibrations corresponding to the vibration mode in which the outer tub 3 is swung around the rotation axis Ra is very low rotation of about 2 to 3 Hz. The speed zone appears. The most likely vibration in the washing machine 1 is that the washing and dewatering tank 4 rotates at a high speed together with the pulsator 43. Usually, the washing dewatering tank 4 rotates at a predetermined operating speed that is sufficiently higher than the number of low-order natural vibrations, but after starting, the speed is increased. In the process of decelerating from the above-described operation speed, when the rotational speed of the washing and dewatering tank 4 coincides with or is close to the number of low-order natural vibrations, the outer tank 3 vibrates largely around the rotation axis Ra. Further, when the laundry entering the inside of the washing and dewatering tank 4 is biased, it becomes an imbalance around the rotation axis Ra, the vibration force increases, and the vibration of the outer tank 3 further increases.

Therefore, the washing machine 1 (1A) of the present embodiment suppresses the vibration of the outer tub 3 to a small extent, as shown in Figs. 1 and 2, in the vicinity of the upper portion of the outer surface 32a of the side plate 32 constituting the outer tub 3. The second elastic support device 6 is disposed at each position. More specifically, the washing machine 1 (1A) is provided with a pair of x-direction elastic supporting means 6x, 6x disposed along the x-direction as a first direction crossing the rotation axis Ra, and sandwiching the outer groove 3; The pair of y-direction elastic supporting

devices

6y and 6y that sandwich the outer groove 3 are disposed in the y direction as the second direction intersecting the rotation axis Ra and the first direction. The elastic supporting

devices

6x and 6y are disposed in a cross shape centered on the rotating shaft Ra in plan view, and face the side plates 21 to 21 constituting the main body 2, respectively. Hereinafter, when it is necessary to distinguish according to the direction of the arrangement, it is referred to as the x-direction elastic supporting device 6x or the y-direction elastic supporting device 6y, and these are collectively referred to as the second elastic supporting device 6 when it is not necessary to distinguish them according to the direction.

Fig. 3(a) is a plan view showing the second elastic supporting device 6 in an enlarged manner. The second elastic supporting device 6 is composed of a compression coil spring 61 as an elastic body, a block-shaped base end member 63 attached to one end 61a of the compression coil spring 61, a plate-shaped distal end member 64 attached to the other end 61b, and The compression coil spring 61 is constituted by a restriction cord 62 of a pressurized displacement restricting device. The proximal end member 63 functions as a mounting member for attaching the compression coil spring 61 to the outer surface 32a of the outer tub 3. The distal end member 64 has a predetermined gap E between the inner surfaces 21a of the side plates 21 constituting the main body 2, and when the outer grooves 3 are further displaced, the distal end members 64 abut against the inner surface 21a of the main body 2. That is, the distal end member 64 functions as an abutting portion for abutting against the inner surface 21a of the main body 2. Thus, the compression coil spring 61 connects the one end 61a to the outer surface of the outer tub 3 via the proximal end member 63, and the other end 61b faces the inner surface 21a of the main body 2 via the gap E.

Figure 3 (b) is a view showing the compression coil spring 61 constituting the second elastic supporting means 6 and as a displacement limit An explanatory view of the relationship of the restriction cord 62 of the manufacturing apparatus.

As shown in FIG. 3(b), the compression coil spring 61 changes from a state of the natural length L (upper stage of FIG. 3(b)) to a state of compressing ΔL by applying the pressure Fp (middle of FIG. 3(b)). In this state, when the center of the compression coil spring 61 is attached and the restriction cord 62 between the joint end member 63 and the front end member 64 is attached, the displacement is restricted so that the compression coil spring 61 is not further elongated. However, since the restriction cord 62 has flexibility, the compression coil spring 61 is allowed to be displaced in the compression direction with reference to the state in which the above-described pressure Fp is given (Fig. 3(b) lower stage).

4(a) and 4(b) schematically show the structure of the washing machine 1 of the present embodiment. Next, the force acting on the outer tub 3 of the washing machine 1 will be described with reference to Fig. 1 using Figs. 4(a) and 4(b).

First, the outer tub 3 is suspended by the above-described four elastic supporting devices 5 to 5, and a restoring force k·e for returning the outer tub 3 to the center is generated in accordance with the displacement e from the center. Here, k is a spring constant in a case where the restoring force acting in the center direction by the elastic supporting devices 5 to 5 is regarded as an elastic force (see FIG. 4( a )).

Further, when the mass of the outer tank 3 is M and the outer tank 3 is rotated about the center of rotation Cr of the distance (displacement) e from the center of gravity Cg, an inertial force (centrifugal force) M·ω toward the outer diameter direction is generated. ² ·e. Here, ω is an angular frequency when the outer tub 3 is rotated, and is equal to the angular frequency ω when the washing and dewatering tank 4 is rotated. In addition, when the imbalance of the rotating portion inside the outer tub 3 such as the washing and dewatering tank 4 (see FIG. 2) is Δm, and the distance from the center of rotation Cr is r, the inertia force due to the imbalance ( The centrifugal force) is Δm·r·ω ² .

Therefore, in the case of considering the balance of forces from these, the relationship of the following formula is obtained.

M·ω ² ·e+Δm·r·ω ² =k·e···(1)

After deforming it, the following formula is obtained.

e=Δm·r·ω ² /(M·ω ² -k)···(2)

According to the formula (2), when the rotational speed satisfying M·ω ² -k=0 is satisfied, the displacement e is extremely large, that is, the resonance state in which the vibration is increased.

Further, if the force generated on the left side of the equation (1) is the inertia force Fi and the spring force generated on the right side is Fk, it can be expressed as follows.

Fi=M·ω ² ·e+Δm·r·ω ² ···(3)

Fk=k·e···(4)

FIG. 5 is a graph showing the relationship between the above equation with the amplitude (displacement) e being the horizontal axis and the vibration force F including the inertial force Fi or the spring force Fk being the vertical axis. The straight lines L1 to L10 shown in the drawing are inertial characteristic straight lines indicating the relationship of the formula (3), and the straight line La is a spring characteristic straight line indicating the relationship of the formula (4), and they are straight lines. The intersection point represents the amplitude (displacement) e and the vibration force F at the angular frequency ω.

In the inertial characteristic lines L1 to L10, the slope is proportional to the square of the angular frequency ω, and the slice (intersection) on the horizontal axis is represented by Δm·r/M. The inertial characteristic lines L1 to L10 are described so that the magnitude of the angular frequency ω is different, and the amplitude e and the inertial force Fi such as L2, L3, ... L10 are increased from the straight line L1 as the angular frequency ω increases. The relationship has changed. Therefore, the intersection of each of the inertial characteristic straight lines L1 to L10 and the spring characteristic straight line La shows the relationship between the amplitude e of each angular frequency ω and the vibration force F.

When the washing and dewatering tank 4 (refer to FIG. 1) is started, the amplitude e and the vibration force F are changed as follows in consideration of the process of increasing the angular frequency ω.

First, when the angular frequency ω corresponding to the inertia line L1 is obtained, the amplitude e and the vibration force F corresponding to the intersection P1 of the inertia characteristic line L1 and the spring characteristic line La are generated. When the angular frequency ω increases and corresponds to the inertia characteristic line L2, the amplitude e and the vibration force F corresponding to the intersection P2 of the inertia characteristic line L2 and the spring characteristic line La are generated. Further, when the angular frequency ω is increased to correspond to the inertia characteristic line L3, the amplitude e and the vibration force F corresponding to the intersection P3 of the inertia characteristic line L3 and the spring characteristic line La are generated. In the case where the angular frequency ω is further increased from this state and it is desired to transition to the state of the inertia line L4, the amplitude e corresponding to the intersection with the inertia characteristic line La is extremely large.

However, as described above, in the present embodiment, since there is a gap E between the outer tub 3 and the main body 2 and the second elastic supporting device 6 is provided (refer to FIGS. 1 and 3), the compression is constituted by the elastic supporting device 6. The action of the coil spring 61 pushes the outer groove 3 back toward the center by a stronger force. At this time, the compression coil spring 61 is restricted by the restriction cord 62 as the displacement limiting means in a state in which the pressure Fp is given in advance. Therefore, even if only a slight displacement occurs, the restriction by the restriction rope 62 is released, and the amount of the upward pressure Fp is applied to the outer tank 3. In other words, when the outer tank 3 is largely vibrated and displaced by the gap E or more, the spring constant k acts to increase as the spring force is greatly increased by the pressurization Fp. In other words, the spring characteristic straight line La changes to the spring characteristic line Lb having a larger inclination in a region where the amplitude e is equal to or larger than the gap E.

Thereby, the amplitude e and the vibration force F corresponding to the intersection P4 of the inertia line L4 and the spring characteristic line Lb become abruptly small. This indicates that the number of low-order natural vibrations of the outer tank 3 is changed by the second elastic supporting device 6, and the vibration is reduced by the offset from the angular frequency ω.

Since the amplitude e becomes smaller than the gap E and the number of low-order natural vibrations of the outer groove 3 returns to the original state again, the angular frequency ω becomes larger than the number of low-order natural vibrations, and the resonance is not generated again, and the amplitude e can be maintained. Small state. That is, even if the angular frequency ω is increased, moving to the inertia lines L5, L6, as with the spring As shown by the intersections P5 and P6 of the characteristic line La, the amplitude e does not exceed the gap E, and can be maintained at a small level.

Further, the spring characteristic straight line Lb does not have to pass through the origin, and the spring constant k seems to be a sharply increasing relationship. In other words, if the pressure Fp is set sufficiently large, the amount of compression ΔL and the gap E (see FIG. 3) at the time of pressurization can be appropriately changed.

As described above, since the second elastic supporting device 6 including the compression coil spring 61 is provided in the outer tub 3, the angular frequency ω, that is, the rotational speed is close to the outer groove while the washing and dewatering tank 4 is rotationally increased to a predetermined operating speed. When the amplitude e exceeds the gap E, the second elastic support device 6 abuts against the inner surface 21a of the main body 2 when the amplitude e exceeds the gap E. The compression coil spring 61 constituting the second elastic supporting device 6 is restricted in displacement in the elongation direction by being pressurized in advance, and thus acts by pressurizing Fp in the case where displacement in the compression direction occurs. Thereby, the number of low-order natural vibrations is largely changed, whereby vibration can be reduced. Further, when the amplitude e is smaller than the gap E, the number of the low-order natural vibrations returns to the original state, but the rotational speed of the washing and dewatering tank 4 is increased, and the state of the low-order natural vibration is separated. Suppresses the increase in vibration.

Therefore, it is possible to suppress vibration and noise to a small extent, and it is possible to improve the environment around the installation place of the washing machine 1. Further, even if the gap E between the main body 2 and the outer tub 3 is reduced, it is possible to suppress these severe collisions and damage due to vibration, and thus the main body 2 can be reduced with respect to the outer tub 3 to reduce the size of the entire washing machine 1. Further, the size of the main body 2 is kept as it is, and in the case where the outer tub 3 is increased, the washing capacity can be increased without changing the size of the entire washing machine 1.

Then, the compression coil spring 61 constituting the second elastic supporting device 6 is attached to the outer groove 3 side, and the displacement of the outer groove 3 abuts between the compression coil spring 61 and the object side which is repeatedly separated as the main body 2 . Since the side plate 21 of the main body 2 is formed of metal, there is sufficient strength for the abutment/separation of the compression coil spring 61, and the possibility of damage is small. Further, since the front end (the other end) 61b of the compression coil spring 61 and the side plate 21 of the main body 2 are opposed to each other substantially in parallel, it is possible to prevent the one side portion at the time of contact from coming into contact, and it is possible to prevent local wear. Further, in the inner surface 21a of the side plate 21 constituting the main body 2, the impact of the metal plate for reinforcement and the compression coil spring 61 abutting is reduced, and an elastic piece for realizing reduction of noise is suitably provided.

On the other hand, although the outer tank 3 is formed of a resin and the strength of the surface is relatively low, since the contact and separation with the compression coil spring 61 are not repeated, the abrasion of the surface can be suppressed, and the damage can be reduced even after long-term use. Possible.

Further, as described above, since the compression coil spring 61 is attached to the outer surface 32a of the outer groove 3 through the proximal end member 63, the outer surface 32a of the outer groove 3 does not need to be a circumferential surface, and may be provided with a rib. The shape of the pipe or the mounting portion of the wiring can also increase the degree of design freedom.

Fig. 6 is a vertical cross-sectional view showing a first modification of the washing machine 1 (1A) of the first embodiment shown in Fig. 1 and the like. The same components as those of the washing machine 1A shown in FIG. 1 to FIG. 5 are denoted by the same reference numerals, and their description is omitted.

The washing machine 1B shown in Fig. 6 is a structure of the washing machine 1A shown in Fig. 1, and further four fourth elastic supporting means 6 to 6 are attached. Specifically, the washing machine 1B has a second elastic support at a height position about 1/3 of a distance from the outer groove 3 directly below the second elastic supporting devices 6 to 6 provided in the washing machine 1A shown in Fig. 1 . Device 6.

In this way, since the second elastic supporting device 6 is disposed in a two-layer manner in the vertical direction (Z direction) of the washing machine 1B, even when the outer groove 3 is swung in the vicinity of the x-axis and the y-axis, the upper and lower second elastic supporting devices 6 are also Abutment with the main body 2 can suppress the inclination of the outer tub 3. Therefore, it is possible to suppress not only the vibration of the outer groove 3 around the rotation axis Ra but also the vibration of the pitch mode about the x-axis and the y-axis. Further, if the increase in weight is allowed, the structure of the second elastic supporting device 6 may be provided in three or more layers.

Fig. 7 (a) is a view showing a second modification of the washing machine 1 (1A) of the first embodiment shown in Fig. 1 and the like. The same components as those of the washing machine 1A shown in FIGS. 1 to 5 are denoted by the same reference numerals, and the description thereof will be omitted.

The washing machine 1C shown in Fig. 7(a) is different from the washing machine 1A shown in Fig. 1 in that a contact plate 71 as a contact portion is provided inside the main body 2. Fig. 7 (b) is a perspective view for explaining the shape of the abutted plate 71. The abutting plate 71 is disposed in a strip shape which is formed in a substantially circular shape in a plan view and which is in contact with the inner surface 21a of the side plate 21 of the main body 2, and is formed of a resin or a steel plate. The abutted plate 71 and the compression coil spring 61 constituting the second elastic supporting device 6 are disposed in a positional relationship in which the distal end members 64 (see FIG. 3) abut each other. Further, the contacted plate 71 has a width dimension slightly larger than the diameter of the compression coil spring 61 in the vertical direction, and is configured to be able to abut against the second elastic support device 6. Further, the abutted plate 71 does not need to be constituted by one member, and may be configured to have a substantially circular shape in plan view by connecting a plurality of members.

In the above-described configuration, the second elastic supporting device 6 is in contact with the main body 2 by the abutting plate 71, so that the impact on the main body 2 at the time of abutment can be alleviated, and the damage of the main body 2 can be suppressed. Further, when the second elastic support device 6 abuts against the curved surface, even when the outer groove 3 is swung around the rotation axis Ra, since the contact state is not unstable and uniform contact can be maintained, the vibration can be more appropriately suppressed. . Further, the main body 2 and the second elasticity can be changed by appropriately changing the size and material of the abutment plate 71. The frictional force of the support device 6 can further improve the vibration suppression effect.

(Second embodiment)

Fig. 8(a) corresponds to Fig. 2 in the first embodiment described above, and is a cross-sectional view showing the washing machine 201 (201A) according to the second embodiment of the present invention. The same components as those of the first embodiment (FIGS. 1 to 5) are denoted by the same reference numerals, and the description thereof is omitted.

The arrangement of the second elastic supporting device 6 of the washing machine 201 shown in Fig. 8(a) and the mounting structure of the outer tub 3 are different from those of the washing machine 1 (see Fig. 2) of the first embodiment.

Specifically, the x-direction elastic supporting device 6x and the y-direction elastic supporting device 6y, together with the compression coil springs 61, 61 constituting these as the elastic bodies, are grouped one by one with the corner of the internal space 2a in the main body 2 The portion 2a1 is close to each other, and is disposed at a position where both sets are axisymmetric about the rotation axis Ra.

Fig. 8 (b) is an enlarged view of a main part of the washing machine 201 shown in Fig. 8 (a). As shown in Fig. 8(b), the x-direction elastic supporting device 6x and the y-direction elastic supporting device 6y constituting each group are attached to a common pedestal 236 provided on the outer surface 32a of the outer tub 3. The pedestal 236 includes a mounting surface orthogonal to the x direction and a mounting surface orthogonal to the y direction, and the x-direction elastic supporting device 6x or the y-direction elastic supporting device 6y is attached. Therefore, the positional relationship of each of the second elastic supporting

devices

6x and 6y is appropriately set, and the number of components can be reduced. Further, since the second elastic supporting device 6 in this embodiment is appropriately attached to the pedestal 236, a plate-like base end member 263 having a flat mounting surface is provided instead of the base end member 63 shown in FIG.

Further, the respective second elastic supporting means 6 and the inner surface 21a of the main body 2 are respectively opposed to the first embodiment, and opposed to each other via the gap E.

Therefore, the present embodiment has the same effects as those of the above-described first embodiment, and the second elastic supporting device 6 is disposed close to the corner portion 2a1 which is easy to become a useless space in the main body 2, thereby effectively utilizing the space to realize the washing machine. Further miniaturization of 201 as a whole.

Further, even in the case where the vibration of the outer groove 3 around the rotation axis Ra is not generated, in other words, even if the outer groove 3 does not perform any displacement in the x and y directions, the outer groove 3 is swung around the rotation axis Ra. In this case, the front end member 64 of the second elastic supporting device 6 can also be brought into contact with the main body 2. Therefore, even if the vibration of the swing mode is around the rotation axis Ra due to the uneven rotation of the motor 34 or the torque ripple or the like, the vibration can be appropriately suppressed.

FIG. 9 is a view showing a modification of the washing machine 201 (201A) of the second embodiment shown in FIG. 8. The same components as those of the washing machine 201A shown in FIG. 8 are denoted by the same reference numerals, and the description thereof will be omitted.

The washing machine 201B shown in FIG. 9 is different from the washing machine 201A shown in FIG. 8 in that the main body 2 is provided with the abutting block 271. The abutted blocks 271 are respectively disposed at positions opposed to the gap E (see FIG. 8) via the four second elastic supporting devices 6 to 6. The mounting surface 271a of each of the abutting blocks 271 is formed in a planar shape, and the mounting surface 271a is fixed in a state of abutting against the inner surface 21a of the side plate 21 constituting the main body 2, and is in contact with the second elastic supporting means 6 to 6 The opposite side forms a contacted surface 271b as a contacted portion. The abutting surface 271b is formed as a plane having a slightly larger width than the front end member 64 (refer to FIG. 3) of the second elastic supporting device 6 in the vicinity of the center thereof, and thus protrudes toward the inner side of the main body 2 as it travels in the end direction. The curved surface is smoothly formed continuously.

In the case of the above configuration, the protection of the side plate 2 constituting the main body 2 can be appropriately realized, and even in the case where the outer groove 3 is swung around the rotation axis Ra, since the abutting surface 271b includes a curved surface, it is possible to The contact state of the second elastic supporting device 6 is made uniform, and the vibration suppressing effect can be more appropriately obtained.

(Third embodiment)

Fig. 10 (a) corresponds to Fig. 2 in the first embodiment, and is a cross-sectional view showing a washing machine 301 (301A) according to a third embodiment of the present invention. The same components as those of the first embodiment (FIGS. 1 to 5) are denoted by the same reference numerals, and the description thereof is omitted.

The washing machine 301 shown in Fig. 10(a) is in the same manner as the washing machine 1 of the first embodiment in the configuration of the second elastic supporting device 306 and the abutting block 371 provided opposite to the second elastic supporting device 306. 2 reference) is different. The second elastic supporting device 306 is different in structure from the second elastic supporting device 6 (see FIG. 2) in the first embodiment, but is disposed at the same position with respect to the outer groove 3.

FIG. 11 is a cross-sectional view showing the structure of the second elastic supporting device 306. The second elastic supporting device 306 in this embodiment is configured as an elastic unit 306A shown in Fig. 11(a). The elastic unit 306A is formed of a housing 362 that is opened at one end and provided with an opening 362a at the other end, and is formed in a convex shape toward the inner surface 21a (refer to FIG. 10) of the main body 2 and protrudes from the opening 362a of the housing 362 to protrude the front end 363b. The shaft body 363 of the abutting portion is composed of a compression coil spring 361A which is an elastic body provided in the casing 362, and a base end member 364 which seals the other end of the casing 362.

The shaft body 363 has a cross-sectional shape slightly smaller than the opening 362a, and has a flange portion 363a larger than the opening 362a on the proximal end side. The front end 363b of the shaft body 363 is formed in a hemispherical shape and can be abutted with the block 371 (refer to FIG. 10) smoothly abuts.

The first embodiment of the compression coil spring 361A is housed in the same state as the pressurized Fp (see FIG. 3), and is sealed by the proximal end member 364. Further, the elastic unit 306A is fixed to the outer tub 3 by attaching the base end member 364 to the outer surface 32a of the outer tub 3. Thus, one end of the compression coil spring 361A is connected to the outer surface 32a of the outer tub 3 through the base end member 364, and the above-mentioned shaft body 363 is provided on the other end.

The shaft body 363 is biased by the compression coil spring 361A in a direction in which the front end 363b protrudes, and is caught by the end portion of the casing 362 by the flange portion 363a, thereby prohibiting further protrusion. In other words, the housing 362 functions as a displacement restricting means that allows displacement of the distal end of the compression coil spring 361A in the compression direction and restricts displacement in the extension direction, based on the state in which the compression coil spring 361A is pressurized.

According to this state, when the front end 363b of the shaft body 363 is pushed in the axial direction as shown in FIG. 11(b), the restriction by the casing 362 is released, and the shaft body 363 is pressurized by FP or more. Spring force.

Further, the second elastic supporting device 306 may be configured to include the elastic unit 306A having the compression coil spring 361A shown in FIGS. 11(a) and 11(b), and may be configured as shown in FIGS. 11(c) and 11(d). The elastic unit 306B of the elastic member 361B. Similarly to the compression coil spring 361A, the elastic member 361B may have a property of generating a reaction force due to compression, and may be a rubber or a foamed sponge. Further, the chips generated when the metal or resin is cut may be used as the elastic member 361B.

Returning to Fig. 10 (a), the second elastic supporting means 306 constituted by the elastic unit 306A (refer to Fig. 11) as described above is disposed at two places separated in the x direction by the outer groove 3, and is further disposed to sandwich the outer groove 3. Two places separated in the y direction. In other words, the second elastic supporting device 306 is disposed at a position that forms a cross shape around the rotation axis Ra in plan view. Further, the abutting block 371 is provided at a position opposed to the second elastic supporting device 306, and is fixed to the inner surface 21a of the side plate 21 constituting the body 2.

Fig. 10 (b) is a view showing the positional relationship between the abutted block 371 and the elastic unit 306A. The abutting block 371 is provided with a contact surface 371a as a contact portion that is centered on an axis that passes through the front end 363b of the shaft body 363 that constitutes the elastic unit 306A and is parallel to the rotation axis Ra. It is composed of a curved surface in a plan view. In a steady state in which the washing machine 301 is stopped, the distance d from the front end 363b of the shaft body 363 is substantially equal regardless of the position of the abutting surface 371a. The distance d corresponds to the gap E (see FIG. 3) in the above-described first embodiment, and by displacing the outer groove 3 by the amount of the gap E, the elastic unit 306A abuts against the abutted surface 371a. Further, since the contact surface 371a is formed as a curved surface centering on the distal end 363b of the shaft 363, as shown in FIG. 10(c), the shaft 363 is When the distal end 363b is displaced in a manner in which the original position is rotated as a reference, the both can be smoothly brought into contact with each other.

Therefore, in the present embodiment, the same effect as the above-described first embodiment is obtained, and in the case where the whirling vibration of the outer tub 3 is generated, the front end 363b of the shaft body 363 constituting the elastic unit 306A is placed as a result. The abutted surface 371a of the joint portion is smoothly abutted, and vibration can be appropriately reduced.

Fig. 12 is a view showing a modification of the washing machine 301 (301A) of the third embodiment shown in Fig. 10 . The same components as those of the washing machine 301A shown in FIG. 10 are denoted by the same reference numerals, and their description will be omitted.

The washing machine 301B shown in Fig. 12 includes an elastic unit 306A (see Fig. 11) as the second elastic supporting device 306, and is configured similarly to the

washing machines

201A and 201B (see Figs. 8 and 9) of the second embodiment. Specifically, in the washing machine 301B, the elastic unit 306x and the y-direction elastic unit 306y arranged along the x direction are arranged in groups at the corner portion 2a1 of the internal space 2a of the main body 2, respectively. Further, these elastic unit 306x and y-direction elastic unit 306y are disposed in an appropriate position by being mounted on a common pedestal 236 provided on the outer surface 32a of the outer tub 3. Further, the abutted blocks 371 are respectively disposed at positions facing the

elastic units

306x and 306y via a gap d (see FIG. 10) corresponding to the gap E (see FIG. 3) in the first embodiment.

In the case of such a configuration, the above-described effects can be obtained, and similarly to the second embodiment, even when vibration of a mode that oscillates around the rotation axis Ra occurs, the vibration can be appropriately suppressed. Further, since the second elastic supporting device 306 is configured as the elastic unit 306A (refer to FIG. 11), the operation of the components becomes easy, and the assembly man-hour can be reduced and miniaturized.

(Fourth embodiment)

Fig. 13 is a cross-sectional view showing a washing machine 401 (401A) according to a fourth embodiment of the present invention, corresponding to the first embodiment described above. The same components as those of the washing machine 201 shown in the second embodiment (refer to FIG. 8) are denoted by the same reference numerals, and the description thereof will be omitted.

The washing machine 401 shown in Fig. 13 (a) is provided with a curved panel 481 as an abutting portion at the front end of the x-direction elastic supporting device 6x and the y-direction elastic supporting device 6y as the second elastic supporting means, and in the curved panel The 481 opposing abutment block 471 is different from the washing machine 201 (see FIG. 8) of the second embodiment in that it is provided on the main body 2.

The curved panel 481 has a circular arc shape in plan view and is a strip-shaped member formed of a resin or a metal thin plate. The front end of one of the x-direction elastic supporting means 6x is connected to the front end of one of the y-direction elastic supporting means 6y which is adjacent thereto by the curved panel 481. That is, as a bullet constituting these elastic supporting means 6x, 6y The compression coil springs 61, 61 of the body respectively connect the one end 61a to the outer surface 32a of the outer groove 3, and connect the other ends 61b through the curved panel 481. Further, the position of the arc formed by the curved panel 481 is set centering on the axis Cc (see FIGS. 13(b) and (c)) parallel to the z-axis, wherein the axis Cc is elastically supported by the x-direction. The intersection of the straight line of the axis of the device 6x and the straight line passing through the axis of the elastic support device 6x in the y direction. Similarly, the curved panel 481 is provided at the front end of the other group of the x-direction elastic supporting device 6x and the y-direction elastic supporting device 6y disposed at a position symmetrical about the rotation axis Ra.

The abutted block 471 is configured in a block shape facing the curved panel 481, and is provided in the corner portion 2a1 of the internal space 2a of the main body 2. Further, the abutted portion 471 is also disposed at two locations symmetric about the rotation axis Ra. The abutted block 471 includes a contact surface 471a as a contacted portion that faces the above-described curved panel 481 and has a concave curved surface formed in an arc shape. The abutted surface 471 and the curved panel 481 are disposed such that the same axis Cc is centered in a steady state in which the washing machine 401 is stopped. Therefore, in the range in which the curved panel 481 and the abutted surface 471a face each other, the gap E (see FIG. 3) is substantially uniform in any direction. Further, the angle of the arc formed by the curved panel 481 and the abutted surface 471a of the abutting block 471 is set to be around 120°, and both of them can abut in this range.

As described above, even when the outer groove 3 is displaced upward in the drawing as shown in FIG. 13(b), even if the outer groove 3 is displaced in the upper left direction in the drawing as shown in FIG. 13(c). Next, as long as the same displacement amount, the curved panel 481 can abut against the abutted block 471. Therefore, during the swirling vibration of the outer tub 3, the compression coil spring 61 can be appropriately acted upon by the curved panel 481.

Therefore, in the present embodiment, the same effect as the above-described first embodiment is obtained, and in the case where the whirling vibration of the outer tub 3 is generated, the abutted block 471 provided in the main body 2 is placed in the first The curved panel 481 on the two elastic supporting devices 6 abuts, so that the compression coil spring 61 can be appropriately operated, and the vibration can be appropriately reduced. Further, since the x-direction elastic supporting device 6x and the y-direction elastic supporting device 6y having different directions are connected by the curved plate 481, the second elastic supporting device 6 that is acting can be smoothly switched according to the change in the direction of the displacement of the outer groove 3. Therefore, the vibration can be more appropriately suppressed.

Fig. 14 is a view showing a first modification of the washing machine 401 (401A) of the fourth embodiment shown in Fig. 13 . The same components as those of the washing machine 401A shown in FIG. 13 are denoted by the same reference numerals, and the description thereof will be omitted.

The washing machine 401B shown in FIG. 14 is provided with a curved panel 482 having a shape different from that of the washing machine 401 shown in FIG. 13, and a contacted block 472. The curved panel 482 is disposed in the same position as the curved panel 481 of FIG. Set, but the angle formed by the arc is enlarged to about 180°. Similarly, although the abutted block 472 is also disposed at the same position as the abutted block 471 of Fig. 13, the angle formed by the abutting surface 472a is enlarged to about 180°.

Therefore, the washing machine 401B can restrict the displacement to the total of 360° centered on the rotation axis Ra by the curved panel 482 and the abutted block 472 provided at two places, regardless of which direction can be the same. The displacement amount is abutted. Therefore, the above-described effects can be further enhanced, and the compression coil springs 61 in all directions can be more smoothly operated, and the vibration can be more appropriately reduced.

Fig. 15 is a view showing a second modification of the washing machine 401 (401A) of the fourth embodiment shown in Fig. 13 . The same components as those of the washing machine 401A shown in FIG. 13 are denoted by the same reference numerals, and the description thereof will be omitted.

In the washing machine 401C shown in Fig. 15, the curved panel 481 and the abutted block 471 having the same shape as the washing machine 401 shown in Fig. 13 are provided at four places instead of two. Each of the curved panels 481 and the abutted block 471 opposed thereto are disposed on the corner portion 2a1 of the main body 2, respectively. Further, the x-direction elastic support device 6x and the y-direction elastic support device 6y are provided in an amount corresponding to the number of the curved panels 481.

As described above, since the angle of the circular arc formed by the curved panel 481 and the abutting block 471 is set to be around 120°, the direction of 360° or more can be covered by the total of four places. Therefore, since the same displacement amount can be abutted regardless of the direction, the compression coil spring 61 in each direction can be more smoothly operated as in the first modification described above, and the vibration can be appropriately reduced.

Fig. 16 is a view showing a third modification of the washing machine 401 (401A) of the fourth embodiment shown in Fig. 13 . The same components as those of the washing machine 401A shown in FIG. 13 are denoted by the same reference numerals, and the description thereof will be omitted.

The washing machine 401D shown in Fig. 16 includes the curved panel 481 and the abutted block 471 having the same shape as the washing machine 401 shown in Fig. 13, but the elastic unit 306A in the third embodiment is used as the second elastic supporting means 306 ( The structure of FIGS. 10 and 11) is different from that of the washing machine 401 shown in FIG. Therefore, the same effects as described above can be obtained, and reduction in assembly man-hours and miniaturization due to unitization can be achieved.

Fig. 17 (a) corresponds to Fig. 2 in the first embodiment described above, and is a cross-sectional view showing a washing machine 501 according to a fifth embodiment of the present invention. The same components as those of the first embodiment (FIGS. 1 to 5) are denoted by the same reference numerals, and the description thereof is omitted.

In the washing machine 501 shown in Fig. 17 (a), the front end of the second elastic supporting device 6 serves as an outer groove The abutting portion that is coaxially disposed is provided with the annular regulating member 581, and the abutting plate 71 is provided on the main body 2 so as to face the same, which is different from the washing machine 1 (see FIG. 2) of the first embodiment. The abutted plate 71 is configured in the same manner as the second modification (see FIG. 7) of the above-described first embodiment.

Fig. 17 (b) is a perspective view for explaining the shape of the restricting member 581. The restricting member 581 is composed of an annular upper plate 581a, an annular lower plate 581b disposed in parallel with the lower side thereof, and a side plate 581c connected to the outer peripheral side thereof, and the cross section when the plane parallel to the z direction is cut The "コ" shape of the inside opening.

One end 61a of the compression coil spring 61 constituting each elastic support device 6 is connected to the outer surface 32a (see FIG. 3) of the outer groove 3, and the other end 61b constituting the front end is housed inside the restriction member 581 to be in contact with the restriction member 581. connection. Since the other end 61b of each compression coil spring 61 is not fixed to the side plate 581c, the restriction member 581 is deformed only in the case of being displaced in the direction of compressing the respective compression coil springs 61.

In the washing machine 501, the regulating member 581 and the abutted plate 71 are arranged concentrically, and the gap E (see FIG. 3) corresponding to the first embodiment is set in any direction around the rotation axis Ra. Even if the gap is uniform, the restriction member 581 and the abutted plate 71 can be appropriately brought into contact even when the outer groove 3 is displaced in either direction as long as the displacement amount is the same. Then, by the restricting member 581, the compression coil spring 61 constituting the second elastic supporting device 6 can be compressed to be deformed. Further, deformation is caused by the common restricting member 581, whereby the second elastic supporting device 6 that acts can be smoothly changed in accordance with the change in the displacement direction of the outer tub 3. Therefore, when the outer tank 3 is rotated, the vibration can be more smoothly reduced.

Although the embodiments of the present invention have been described above, the specific configurations of the respective components are not limited to the above-described embodiments.

For example, in the above-described embodiment, the second elastic supporting device 6 (306) and the compression coil spring 61 (361A) constituting the same are disposed along the x direction or the y direction, and are arranged orthogonally to each other in the xy plane. However, the resultant force from these is not necessarily the above direction as long as it is in the center direction. That is, it is sufficient that each of the second elastic supporting means 6 (306) intersects with the rotation axis Ra and is disposed only in a direction crossing each other. Further, it is not necessary to say that the second elastic supporting means 6 (306) must be disposed at four places, and it is sufficient to set at least three places. Further, it is not necessarily arranged along the xy plane, and may be arranged in an oblique direction including components in the z direction, such as slightly upward or downward.

Further, in the above-described embodiment, the outer tank 3 is configured such that the inner tank supported internally serves as the washing and dewatering tank 4. However, the present invention can be preferably utilized even when high-speed rotation of the inner tank is required, even if The above structure can also be applied to the tank only for the washing tank or the dewatering tank.

In addition, in the above-described embodiment, the axial direction of the outer tub 3 is oriented in the z direction, that is, in the vertical direction, but the present invention can be applied similarly even to the obliquely upward direction. Further, the present invention can be preferably used even in a drum type washing machine in which the axial direction of the outer tub 3 is horizontal.

Description of the reference numerals

2: main body; 2a: inner space; 2a1: corner portion; 3: outer groove; 4: washing dewatering tank (inner tank); 5: elastic support device; 21a: (main body) inner surface; 32a: (outer groove ) outer surface; 34: motor; 51: hanging rod; 61: compression coil spring (elastomer); 61a: (one end of the compression coil spring); 61b: (the other end of the compression coil spring); 62: restriction rope (displacement) Limiting device); 361A: compression coil spring (elastomer); 361B: elastic member (elastomer); 362: housing (displacement limiting device); 363: shaft body (abutment portion); 363b: (shaft body) Front end; 371a: abutted surface (abutted portion); 471a: abutted surface (abutted portion); 481: curved panel (abutment portion); 581... restricting member (abutment portion); Cc: Axis; E: gap; Fp: pressurization; Ra: axis of rotation.

Claims

A washing machine comprising: a main body in which an internal space is formed; an outer tank disposed in an internal space of the main body; an inner tank disposed inside the outer tank and rotatably supported, and provided in the outer tank An electric motor that rotates the inner groove, and an elastic support device that elastically supports the outer groove with respect to the main body, wherein

An elastic body disposed at a plurality of positions around the rotation axis of the inner groove between the outer groove and the main body, and having one end and the outer groove in a state of being pressurized by compression The surface is connected and the other end is opposed to the inner surface of the main body via a gap; and the displacement restricting means is configured to allow the other end to be displaced in the compression direction and to restrict the displacement in the elongation direction by giving the pressed state as a reference .
The washing machine according to claim 1, wherein at least one pair of the elastic bodies are disposed along a first direction crossing the rotation axis and sandwiching the outer groove, and along the rotation axis And at least one pair of the elastic bodies are disposed in a second direction in which the first direction intersects and sandwich the outer groove.
The washing machine according to claim 2, wherein an inner space formed in the main body has a substantially rectangular parallelepiped shape, and the outer groove has a substantially bottomed cylindrical shape, and an elastic body disposed along the first direction The elastic bodies disposed along the second direction are respectively grouped one by one, and are disposed close to the corners of the inner space.
The washing machine according to any one of claims 1 to 3, wherein an abutting portion formed in a convex shape toward an inner surface of the main body is provided at the other end of the elastic body, and is to be abutted a joint portion is disposed on an inner surface of the main body such that the abutting portion and the abutted portion are opposed to each other, wherein the abutted portion is formed to pass through a front end of the abutting portion and is parallel to the rotating shaft The axis is centered in an arc shape.
The washing machine according to any one of claims 1 to 3, wherein an abutting portion is provided at the other end of the elastic body, and the abutted portion is provided on an inner surface of the main body, The abutting portion and the abutted portion are opposed to each other, wherein the abutting portion is formed in an arc shape centering on an axis parallel to the rotating shaft, and the abutted portion is formed to The same axis of the abutting portion has an arc shape centered on the center.
The washing machine according to claim 5, wherein said other end of at least two elastic bodies is joined to said abutting portion.