WO2020135596A1

WO2020135596A1 - Drum washing machine

Info

Publication number: WO2020135596A1
Application number: PCT/CN2019/128725
Authority: WO
Inventors: 西野雅文
Original assignee: 青岛海尔洗衣机有限公司; Aqua株式会社; 海尔智家股份有限公司
Priority date: 2018-12-27
Filing date: 2019-12-26
Publication date: 2020-07-02
Also published as: CN113227482A; JP2020103565A

Abstract

Provided is a drum washing machine, which prevents the weight of the balance counterweight from being concentrated at the screw welding portion of the outer tub. The drum washing machine has: a machine body (10); an outer tub (20) provided with a drum (22) for accommodating laundry in a freely rotating manner; outer tub support platforms (30) which are connected to the machine body (10) by means of a plurality of shock absorbers (28) and swingably support the outer tub (20); outer tub bands (31, 32) fixed to the outer tub support platforms (30) by welding, and extending along the outer circumferential surface of the outer tub (20); and a balance counterweight (D) connected to one ends (31a, 32a) and the other ends (31b, 32b) of the outer tub bands (31, 32) at the upper portion of the outer tub (20).

Description

Drum washing machine

Technical field

The present invention relates to a drum washing machine that performs, for example, a washing process, a rinsing process, and a dehydration process.

Background technique

The drum washing machine performs washing of the laundry by arranging the drum in a cylindrical shape to rotate freely about the horizontal axis or the tilting axis in the outer cylinder arranged in the cabinet, and storing the laundry in the drum The drum is rotated while water is stored in the drum.

In the drum washing machine, in order to reduce the transmission of the vibration when the drum rotates at a high speed to the cabinet, the outer cylinder in which the drum is installed is supported by a damper and a spring.

Therefore, although the outer cylinder is freely oscillated inside the box by an elastic member such as a shock absorber or a spring, it is necessary to increase the weight of the outer cylinder itself in order to suppress the large vibration of the drum when it is driven to rotate at a high speed especially during dehydration.

Therefore, in the drum washing machine, a balance weight of a predetermined weight is attached to the upper portion of the outer tub. Therefore, the weight of the outer cylinder itself becomes heavier, which can reduce the vibration caused by the imbalance of the laundry during the dehydration process.

In the conventional drum washing machine 101, as shown in FIG. 7, balance

weights

150 and 160 are mounted on the upper portion of the outer tub 120. The outer cylinder 120 is rotatably supported by a plurality of springs/shock absorbers 128, for example.

As shown in FIG. 8, reinforcing

plates

151 and 161 are welded to the outer cylinder 120, and a plurality of

screws

152 a and 162 a for fixing the

balance weights

150 and 160 are welded to the reinforcing

plates

151 and 161. As the reinforcing

plates

151 and 161, plate-like members having a thickness larger than that of the outer cylinder 120 are used.

In a state where the plurality of

screws

152a, 162a are inserted into the plurality of through

holes

150a, 160a formed in the

balance weights

150, 160, the

nuts

152b, 162b are screwed onto the

screws

152a, 162a, and the

balance weights

150, 160 It is fixed to the reinforcing

plates

151 and 161.

As described above, the

screws

152a and 162a used to fix the

balance weights

150 and 160 are not welded to the outer cylinder 120, but are directly welded to the reinforcing

plates

151 and 161 fixed to the outer cylinder 120 to prevent the balance weight The weights of 150 and 160 are concentrated on the screw welding portion of the outer cylinder 120 with a thin thickness.

However, in the drum washing machine 101, the weight of the

balance weights

150 and 160 is concentrated on the screw welded portions of the reinforcing

plates

151 and 161, which may cause a weld crack.

In addition, in order to prevent the weights of the

balance weights

150 and 160 from being concentrated on the screw welded portions of the outer cylinder 120 having a thin thickness, the reinforcing

plates

151 and 161 having a larger thickness than the outer cylinder 120 are used, which may increase the number of components.

Existing technical literature

Patent Literature

Patent Document 1: Japanese Patent Laid-Open No. 2007-167262

Summary of the invention

Problems to be solved by the invention

An object of the present invention is to provide a drum washing machine which can prevent the weight of the balance weight from being concentrated on the screw welded portion of the outer cylinder.

Solutions for solving problems

That is, the drum washing machine of the present invention is characterized by comprising: a cabinet; an outer cylinder, which rotatably houses a drum for storing laundry; and an outer cylinder support table, which is connected to the cabinet by a plurality of shock absorbers. Supporting the outer cylinder swingably; an assembly member fixed to the outer cylinder support table by welding, extending along the outer circumferential surface of the outer cylinder; and a balance weight, which is connected to the assembly member at the upper part of the outer cylinder Is connected to one end and the other end.

In the drum washing machine of the present invention, the balance weight includes: a first balance weight connected to one end of the assembly member; and a second balance weight connected to the other end of the assembly member And a connecting member connecting the first balance weight and the second balance weight.

Preferably, in the drum washing machine of the present invention, the first connecting portion formed on the first balance weight and the second connecting portion formed on the second balance weight are connected by the connecting member Next, a gap is formed between the first connection portion and the second connection portion.

Effect of invention

In the drum washing machine of the present invention, since the welding screw is not used to fix the balance weight, there is no risk of welding seam cracking. In addition, since the outer cylinder can be fixed to the outer cylinder support table by the mounting member and the balance weight can be fixed to the upper portion of the outer cylinder, the number of parts can be reduced.

In the drum washing machine of the present invention, the first balance weight connected to one end of the assembly member and the second balance weight connected to the other end of the assembly member are connected by the connection member, thereby enabling the first balance weight And the second balance weight is easily fixed to the upper part of the outer cylinder.

In the drum washing machine of the present invention, in a state where the first connection portion of the first balance weight and the second connection portion of the second balance weight are connected by the connection member, the outer circumferential surface of the outer tub is tightened by the assembly member, This can fix the outer cylinder and balance the weight.

BRIEF DESCRIPTION

1 is a side cross-sectional view showing the structure of a drum washing machine 1 according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a schematic structure of the inside of the drum washing machine 1 of FIG. 1.

FIG. 3 is a perspective view showing a partial structure of FIG. 2.

4 is a top view showing a partial structure of FIG. 2.

FIG. 5 is an exploded perspective view of the inside of the drum washing machine 1 of FIG. 1.

6 is a diagram showing a method of fixing the first balance weight 50 and the second balance weight 60 to the upper portion of the outer cylinder 20.

FIG. 7 is a perspective view showing a schematic structure of the inside of the conventional drum washing machine 101.

FIG. 8 is a diagram illustrating a method of fixing the first balance weight 150 and the second balance weight 160 to the upper portion of the outer tub 120 in the drum washing machine 101 of FIG. 7.

DESCRIPTION OF REFERENCE NUMERALS

1: drum washing machine; 10: cabinet; 20: outer cylinder; 22: drum; 28: shock absorber; 30: outer cylinder support table; 31, 32: outer barrel cuff (assembly member); 31a, 32a: outer One end of the bucket cuff (one end of the assembly member); 31b, 32b: the other end of the outer bucket cuff (the other end of the assembly member); 50: first balance weight; 55, 56: first connection 60; second balance weight; 65, 66: second connection portion; 85, 86: connecting member; 85a, 86a: screw; 85b, 86b: nut; D: balance weight.

detailed description

Hereinafter, the drum washing machine 1 as an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the drum washing machine 1 includes a cabinet 10 constituting an appearance. The front surface 10a of the cabinet 10 is formed with a laundry inlet 11. The entrance 11 is covered by a door 12 that can be opened and closed freely.

Inside the casing 10, an outer cylinder 20 and a drum 22 built into the outer cylinder 20 are arranged. The drum 22 storing laundry is rotatably arranged in the outer cylinder 20 and is elastically supported by a plurality of dampers (spring dampers) 28. The outer cylinder 20 and the drum 22 rotate around a rotation axis extending in the horizontal direction.

The opening 20a on the front surface of the outer cylinder 20 and the opening 22a on the front surface of the drum 22 face the inlet 11 and are closed by the door 12 together with the inlet 11. A number of dehydration holes 22b are formed in the peripheral wall of the drum 22. Further, on the peripheral wall of the drum 22, three lifting ribs 23 are provided at substantially equal intervals in the circumferential direction.

Behind the outer cylinder 20, a motor 25 that generates torque to drive the drum 22 is arranged.

As shown in FIG. 2, inside the case 10, the outer cylinder 20 is supported by two outer cylinder support stands 30. The two outer cylinder support bases 30 are arranged substantially parallel to the longitudinal direction of the approximately cylindrical outer cylinder 20 below the outer cylinder 20.

The

outer barrel cuffs

31 and 32 as a fitting member for fixing the outer cylinder 20 are fixed to the two outer cylinder support bases 30 by welding.

The two outer cylinder support bases 30 are connected to the bottom base 10c of the cabinet 10 through a plurality of dampers 28, respectively. Therefore, the outer cylinder 20 supported by the outer cylinder support table 30 is supported swingably in the case 10.

As shown in FIG. 3, the two outer cylinder support stands 30 each have a bottom plate portion 30a, an inner plate portion 30b extending upward from the inner end of the bottom plate portion 30a, and an outer plate extending upward from the outer end of the bottom plate portion 30a部30c.

The height of the outer plate portion 30c is higher than the height of the inner plate portion 30b. Two bent plate portions 30d are formed in the bottom plate portion 30a.

The bent plate portion 30d is substantially rectangular, and the portion corresponding to the three sides is cut away from the bottom plate portion 30a, and bent upward along the portion corresponding to the remaining one side. The upper ends of the bent plate portions 30d are arranged along the lower surfaces of the two

outer barrel cuffs

31 and 32, respectively.

The two outer barrel cuffs 31 and 32 are fixed to the two outer cylinder support bases 30 by welding, and are fixed by welding to a part of the upper end of the outer plate portion 30c, the upper end of the bent plate portion 30d and the inner plate portion 30b The upper part. In FIG. 3, the welded portion A of the outer cylinder support base 30 and the outer barrel cuffs 31 and 32 is shown by broken lines.

The two outer barrel cuffs 31 and 32 are rectangular metal plate members. The two outer barrel cuffs 31 and 32 are separately arranged on the front end side and the rear end side of the outer cylinder 20, and the lower end portions thereof are welded to the two outer cylinder support bases 30 and face the upper portion of the outer cylinder 20 along the outer circumferential surface of the outer cylinder 20 extend. It should be noted that a cushioning material such as rubber may be arranged between the two outer barrel cuffs 31 and 32 and the outer peripheral surface of the outer cylinder 20.

As shown in FIG. 2, a balance weight D for reducing the predetermined weight of the outer cylinder 20 is attached to the upper portion of the outer cylinder 20. The balance weight D includes a first balance weight 50, a second balance weight 60, and connecting

members

85, 86 that connect the first balance weight 50 and the second balance weight 60. The first balance weight 50 and the second balance weight 60 are plate-shaped, and their lower surfaces are arranged along the outer circumferential surface of the outer cylinder 20.

4 is a diagram showing the first balance weight 50 and the second balance weight 60 fixed to the upper portion of the outer cylinder 20. As shown in FIGS. 2 and 4, a rectangular parallelepiped connecting portion 51 protruding upward is formed at the lower end of the front end side of the first balance weight 50, and a rectangular opening 52 is formed near the connecting portion 51.

A rectangular parallelepiped connecting portion 53 protruding upward is formed at the lower end on the rear end side of the first balance weight 50, and a rectangular opening 54 is formed near the connecting portion 53.

Similarly, a rectangular parallelepiped connecting portion 61 protruding upward is formed near the lower end of the front end side of the second balance weight 60, and a rectangular opening 62 is formed near the connecting portion 61.

A rectangular parallelepiped connecting portion 63 protruding upward is formed near the lower end on the rear end side of the second balance weight 60, and a rectangular opening 64 is formed above the connecting portion 63.

The one end portion 31a of the outer tub band 31 is fixed to the first balance weight by inserting the screw 81a and the nut 81b formed in the through hole 51a of the connection portion 51 in a state where the opening 52 of the first balance weight 50 is inserted from below 50.

The other end portion 31b of the outer tub band 31 is inserted into the opening 62 of the second balance weight 60 from below, and is fixed to the second balance weight by a screw 82a and a nut 82b passing through the through hole 61a formed in the connection portion 61 Weight 60.

Similarly, the one end portion 32a of the outer tub band 32 is fixed to the first balance by inserting the screw 83a and the nut 83b formed in the through hole 53a of the connecting portion 53 in a state where the opening 54 of the first balance weight 50 is inserted from below Counterweight 50.

The other end portion 32b of the outer tub band 32 is fixed to the second balance weight by inserting the screw 84a and the nut 84b formed in the through hole 63a of the connecting portion 63 in a state where the opening 64 of the second balance weight 60 is inserted from below Weight 60.

A rectangular parallelepiped connecting portion 55 protruding upward is formed at the upper end of the front end side of the first balance weight 50, and a rectangular parallelepiped connecting portion 56 protruding upward is formed at the lower end of the first balance weight 50 at the rear end side. .

A rectangular parallelepiped connecting portion 65 protruding upward is formed on the upper end of the front end side of the second balance weight 60, and a rectangular parallelepiped connecting portion 66 protruding upward is formed on the lower end of the first balance weight 60 on the rear end side. .

The screw 85a is inserted into the through hole 55a of the connecting portion 55 and the through hole 65a of the connecting portion 65, and the nut 85b is screwed onto the screw 85a, whereby the connecting portion 55 of the first balance weight 50 and the second balance weight 60 The connecting portion 65 is connected. Therefore, the screw 85a and the nut 85b are the connecting member 85 of the present invention.

The screw 85 a has a length through which the through hole 55 a of the connecting portion 55 and the through hole 65 a of the connecting portion 65 can be inserted in a state where the connecting portion 55 of the first balance weight 50 and the connecting portion 65 of the second balance weight 60 are separated.

Similarly, the screw 86a is inserted into the through hole 56a of the connecting portion 56 and the through hole 66a of the connecting portion 66, and the nut 86b is screwed onto the screw 86a, whereby the connecting portion 56 and the second balancing weight of the first balance weight 50 The connecting portion 66 of the weight 60 is connected. Therefore, the screw 86a and the nut 86b are the connection member 86 of the present invention.

The screw 86a has a length that allows the through hole 56a of the connecting portion 56 and the through hole 66a of the connecting portion 66 to be inserted in a state where the connecting portion 56 of the first balance weight 50 and the connecting portion 66 of the second balance weight 60 are separated.

Therefore, the connecting portion 55 of the first balance weight 50 connected to one end 31 a of the outer tub cuff 31 and the connecting portion 65 of the second balance weight 6 connected to the other end of the outer tub cuff 31 pass through the connecting member 85 is connected. In addition, the connection portion 56 of the first balance weight 50 connected to one end 32 a of the outer tub cuff 32 and the connection portion 66 of the second balance weight 60 connected to the other end of the outer tub cuff 32 pass through the connection member 86 is connected.

As described above, the outer barrel cuffs 31 and 32 and the first balance weight 50 and the second balance weight 60 are connected by the connecting

members

85 and 86 in a state where they are arranged almost over the entire circumference of the outer cylinder 20 by In addition, the barrel cuffs 31, 32 fix the outer cylinder 20 to the outer cylinder support base 30, and fix the first balance weight 50 and the second balance weight 60 to the upper portion of the outer cylinder 20.

Next, based on FIG. 6, a method of fixing the first balance weight 50 and the second balance weight 60 to the upper portion of the outer cylinder 20 will be described.

In the following description, the connection between the outer barrel cuff 31 and the first balance weight 50 and the second balance weight 60 and the connection portion 55 of the first balance weight 50 and the connection portion of the second balance weight 60 are described. 65, the connection of the outer barrel cuff 32 to the first balance weight 50, the second balance weight 60, and the connection portion 56 of the first balance weight 50 to the connection portion of the second balance weight 60 The connection of 66 is the same, so the description is omitted.

First, as shown in FIG. 6( a ), in a state where the outer tub cuff 31 is fixed to the outer cylinder support base 30 by welding, as shown in FIG. 6( b ), the outer tub 20 is disposed on the outer tub cuff 31 on.

Thereafter, as shown in (c) of FIG. 6, the first balance weight 50 and the second balance weight 60 are arranged on the upper portion of the outer cylinder 20. At this time, the one end 31a of the outer tub band 31 and the other end 31b of the outer tub band 31 pass through the screw 81a, the nut 81b, and the screw 82a with the opening 52 and the opening 62 of the first balance weight 50 inserted from below , The nut 82b is fixed.

The screw 85a is inserted into the through hole 55a of the connecting portion 55 of the first balance weight 50 and the through hole 65a of the connecting portion 65 of the second balance weight 60, and a nut 85b is fitted near the tip of the screw 85a. Therefore, the first balance weight 50 and the second balance weight 60 are in a temporarily fixed state.

After that, as shown in FIG. 6( d ), the nut 85 b is screwed onto the screw 85 a inserted into the connection portion 55 of the first balance weight 50 and the connection portion 65 of the second balance weight 60.

Therefore, by screwing the nut 85b to the screw 85a, the gap between the connection portion 55 of the first balance weight 50 and the connection portion 65 of the second balance weight 60 is reduced.

At this time, the outer barrel cuff 31, the first balance weight 50, and the second balance weight 60 fasten the outer circumferential surface of the outer cylinder 20. The outer barrel 20 passes through the outer barrel cuff 31 and the first balance weight 50, the first The second balance weight 60 is supported by friction. Therefore, the outer cylinder 20 is fixed to the outer cylinder support base 30 by the outer barrel cuff 31, and the first balance weight 50 and the second balance weight 60 are fixed to the upper portion of the outer cylinder 20.

It should be noted that, when connecting the connecting portion 55 of the first balance weight 50 and the connecting portion 65 of the second balance weight 60, the torque for screwing the nut 85b to the screw 85a is adjusted to In the case of the connecting portion 56 of the weight 50 and the connecting portion 66 of the second balance weight 60, the torque for screwing the nut 86b to the screw 86a is the same, whereby the outer cylinder 20 and the first balance weight 50 can be fixed equally. Second balance weight 60.

The drum washing machine 1 of the present embodiment includes: a cabinet 10; an outer tub 20, a drum 22 accommodating laundry inside freely rotating; an outer tub support table 30, which is connected to the cabinet 10 by a plurality of shock absorbers 28, The outer cylinder 20 is swingably supported; the outer barrel cuffs 31, 32 as an assembling member are fixed to the outer cylinder support base 30 by welding, extending along the outer peripheral surface of the outer cylinder 20; and the balance weight D, on the upper portion of the outer cylinder 20 One

end

31a, 32a and the

other end

31b, 32b of the outer tub cuffs 31, 32 are connected.

Thus, in the drum washing machine 1 of the present embodiment, since the welding screw is not used to fix the balance weight D, there is no risk of cracking of the welding seam. In addition, the outer barrel cuffs 31 and 32 fix the outer cylinder 20 to the outer cylinder support base 30 and fix the balance weight D to the upper portion of the outer cylinder 20, so the number of parts can be reduced.

In the drum washing machine 1 of the present embodiment, the balance weight D includes: a first balance weight 50 connected to one

end portions

31a, 32a of the outer drum cuffs 31, 32 as an assembling member; and a second balance weight, as The other ends of the outer barrel cuffs 31, 32 of the assembly member are connected; and the

connection members

85, 86 are connected to the first balance weight 50 and the second balance weight 60.

Thus, in the drum washing machine 1 of the present embodiment, the first balance weight 50 and the second balance weight 60 can be easily fixed to the upper portion of the outer tub 20.

In the drum washing machine 1 of the present embodiment, the

connection portions

55 and 56 that are the first connection portions formed on the first balance weight 50 and the

connection portions

65 and 66 that are the connection portions formed on the second balance weight 60 are connected by In the state where the

members

85 and 86 are connected, a gap is formed between the connecting

portions

55 and 56 and the connecting

portions

65 and 66.

Thus, in the drum washing machine 1 of the present embodiment, the outer circumferential surface of the outer tub 20 is tightened by the

outer tub bands

31 and 32, whereby the outer tub 20 and the

balance weights

50 and 60 can be fixed.

The embodiment of the present invention has been described above, but the specific structure of each part is not limited to the above-mentioned embodiment.

In the above-described embodiment, the drum 22 rotates around the rotation axis extending in the horizontal direction, but the drum 22 may rotate around the rotation axis extending in the oblique direction with respect to the horizontal direction. In the above embodiment, the two

balance weights

50 and 60 are attached to the upper portion of the outer cylinder 20, but the number, shape, and the like of the balance weights attached to the upper portion of the outer cylinder 20 are not limited thereto.

Claims

A drum washing machine is characterized by:

Cabinet

The outer cylinder, freely rotating, is equipped with a drum containing laundry;

The outer cylinder support table is connected to the box body through a plurality of shock absorbers, and swingably supports the outer cylinder;

An assembling member, fixed to the outer cylinder support table by welding, extending along the outer circumferential surface of the outer cylinder; and

The balance weight is connected to one end and the other end of the assembly member at the upper part of the outer cylinder.
The drum washing machine according to claim 1, wherein:

The balance weight has:

The first balance weight is connected to one end of the assembly member;

A second balance weight connected to the other end of the assembly member; and

A connecting member connects the first balance weight and the second balance weight.
The drum washing machine according to claim 2, wherein:

In a state where the first connection portion formed on the first balance weight and the second connection portion formed on the second balance weight are connected by the connection member, the first connection portion and the A gap is formed between the second connection parts.