WO2021129463A1

WO2021129463A1 - Vertical washing machine

Info

Publication number: WO2021129463A1
Application number: PCT/CN2020/136495
Authority: WO
Inventors: 宫地成佳; 市川晶
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: 2019-12-26
Filing date: 2020-12-15
Publication date: 2021-07-01
Also published as: JP7411954B2; CN114901890A; JP2021104209A

Abstract

A vertical washing machine (1) capable of preventing the working sound of a driving portion (32) from leaking to the outside, the machine comprising: an inner drum (4) containing a washing object (Q) and capable of rotating; an outer drum (3) containing the inner drum (4); the driving portion (32) at least provided with a motor (7) generating driving force for rotating the inner drum (4), and configured to a lower side (Z2) of a bottom wall (3B) of the outer drum (3); a cover (40); and a sound insulation component (41). The cover (40) is provided with a cylinder portion (40A) and a closing portion (40C), wherein the cylinder portion (40A) is provided with an upper end portion (40D) mounted on a lower surface portion (3E) of the bottom wall (3B) and surrounding the driving portion (32), and the closing portion (40C) is used for blocking an interior space (40B) of the cylinder portion (40A) from the lower side (Z2). The sound insulation component (41) is mounted on an inner surface (40E) in the cover (40) facing the driving portion (32).

Description

Vertical washing machine

Technical field

The invention relates to a vertical washing machine.

Background technique

The vertical washing machine disclosed in Patent Document 1 below includes: a water tub that receives washing water; a washing machine motor provided at the bottom of the water tub; and a motor cover configured to bend into a U shape so as to straddle the washing machine motor from below, Installed on a bucket fixing part screwed to the bottom of the bucket. The motor cover is in the shape of a cylindrical container and covers the washing machine motor from below. As a result, it is possible to prevent the washing tub motor from being immersed in the washing water when the waterproof tray provided with the vertical washing machine has poor drainage and the washing water is stored in the waterproof tray. A gap is provided between the bottom of the water tub and the upper end of the motor cover, so the washing machine motor in the motor cover is opened to the air through the gap.

The purpose of the motor cover described in Patent Document 1 is only for waterproofing, and it is not conceivable that the motor cover will prevent the operating sound of a washing machine motor from leaking to the outside. In particular, a gap is provided between the motor cover and the bottom of the water tub to open the washing machine motor to the air. Therefore, the operating sound of the washing machine motor is likely to leak to the outside from the gap.

Prior art literature

Patent literature

Patent Document 1: Japanese Patent Application Publication No. 2019-118676

Summary of the invention

The problem to be solved by the invention

The present invention was made in view of this background, and its object is to provide a vertical washing machine that can prevent the operating sound of the drive unit from leaking to the outside.

Solutions used to solve the problem

The present invention is a vertical washing machine, comprising: an inner tub for accommodating laundry and rotatable; an outer tub for accommodating the inner tub, having an upper end and a lower end, and the upper end is formed with a way for the laundry to enter and exit the inner tub. The entrance and exit, the lower end is provided with a bottom wall; the driving part has at least a motor that generates a driving force to rotate the inner tub, and is arranged on the lower side of the bottom wall; the cover has a cylindrical portion and a closing portion, the cylindrical portion Having an upper end portion mounted on the lower surface portion of the bottom wall and surrounding the driving portion, and the closing portion blocks the inner space of the cylindrical portion from the lower side; and a soundproof member mounted on the facing side of the cover The inner surface part of the driving part.

In addition, the present invention is characterized in that the inner surface portion of the cover is composed of a plurality of flat surfaces.

In addition, the present invention is characterized in that the vertical washing machine further includes a buffer member arranged between the tube portion and the lower surface portion.

Invention effect

According to the present invention, in the cover, the cylindrical portion surrounds the driving portion arranged on the lower side of the bottom wall of the outer tub, and the closing portion blocks the inner space of the cylindrical portion in which the driving portion is arranged from the lower side. The upper end part of the cylinder part is attached to the lower surface part of the bottom wall, so the cover covers the driving part in a nearly airtight state. Furthermore, the soundproof member is attached to the inner surface part of the cover. As a result, it is possible to prevent the operating sound of the driving unit in the cover from leaking to the outside.

In addition, according to the present invention, the inner surface portion of the cover is composed of a plurality of flat surfaces. Therefore, compared with the case where the inner surface portion is composed of a curved surface, the soundproof member can be easily and reliably attached to the inner surface portion of the cover.

In addition, according to the present invention, it is possible to prevent loosening of the cover by the cushioning member arranged between the cylindrical part of the cover and the lower surface part of the bottom wall of the outer tub.

Description of the drawings

Fig. 1 is a schematic vertical cross-sectional right view of a vertical washing machine according to an embodiment of the present invention.

Fig. 2 is a perspective view of a cover included in the washing machine.

Fig. 3 is a perspective view of the main part of the washing machine.

Description of Reference Signs

1: vertical washing machine; 3: outer tub; 3B: bottom wall; 3C: annular wall; 3E: bottom surface; 4: inner tub; 7: motor; 18: entrance and exit; 32: drive part; 40: cover; 40A : Cylinder part; 40B: internal space; 40C: closed part; 40D: upper end part; 40E: inner surface part; 41: soundproof member; 42: buffer member; Q: laundry; Z2: lower side.

Detailed ways

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Fig. 1 is a schematic vertical cross-sectional right view of a vertical washing machine 1 according to an embodiment of the present invention. The direction orthogonal to the paper surface of FIG. 1 is called the left-right direction X of the vertical washing machine 1, the left-right direction in FIG. 1 is called the front-rear direction Y of the vertical washing machine 1, and the vertical direction in FIG. 1 is called the vertical direction. Up and down direction Z of type washing machine 1. In the left-right direction X, the back side of the paper surface of FIG. 1 is referred to as the left side X1 of the vertical washing machine 1, and the front side of the paper surface of FIG. 1 is referred to as the right side X2 of the vertical washing machine 1. Among the front-rear direction Y, the left side in FIG. 1 is referred to as the front side Y1, and the right side in FIG. 1 is referred to as the rear side Y2. In the vertical direction Z, the upper side is referred to as the upper side Z1, and the lower side is referred to as the lower side Z2.

The vertical washing machine 1 also includes an integrated washer-dryer with a drying function. Hereinafter, the vertical washing machine 1 will be described by taking a washing machine that performs a washing operation in which the drying function is omitted as an example. The vertical washing machine 1 includes: a cabinet 2 constituting the outer shell of the vertical washing machine 1; an outer tub 3 disposed in the cabinet 2; an inner tub 4 contained in the outer tub 3; and a rotating wing 5 contained in the inner tub 4. The outer tub 3 and the inner tub 4 constitute a washing tub 6. The vertical washing machine 1 includes: a motor 7, which generates driving force to rotate the inner tub 4 and the rotating wing 5; and a brake clutch mechanism 8, which brakes the rotation of the inner tub 4, or transmits the driving force of the motor 7 to the inner tub intermittently 4.

The box body 2 is made of metal, for example, and is formed in a box shape. The upper surface 2A of the box 2 is formed with an opening 15 through which the inside and the outside of the box 2 communicate. A door 16 that opens and closes the opening 15 is provided on the upper surface 2A.

The outer tub 3 is made of resin, for example, and is formed in a cylindrical shape with a bottom. The outer tub 3 is connected to the box body 2 via a support member 17 such as a hanging rod and a shock absorber having a spring and a damping mechanism. Thus, the entire washing tub 6 including the outer tub 3 and the inner tub 4 is elastically supported by the supporting member 17. The outer barrel 3 has: a substantially cylindrical circumferential wall 3A, which is arranged in the vertical direction Z; a bottom wall 3B, which blocks the hollow portion of the circumferential wall 3A from the lower side Z2; The edge wrapping side of the upper side Z1 side of 3A protrudes toward the center side of the circumferential wall 3A. The bottom wall 3B constitutes the lower end of the outer tub 3, and the annular wall 3C constitutes the upper end of the outer tub 3. In the center of the annular wall 3C is formed an inlet 18 communicating with the hollow portion of the circumferential wall 3A from the upper side Z1. The port 18 is in a state of being opposed to and communicating with the opening 15 of the box 2 from the lower side Z2. A door 19 that opens and closes the entrance and exit 18 is provided on the annular wall 3C. The bottom wall 3B is formed in a circular plate shape extending substantially horizontally, and a through hole 3D penetrating the bottom wall 3B is formed at a center position of the bottom wall 3B.

Water can be stored in the outer bucket 3. To the annular wall 3C of the outer tub 3, a water supply channel 20 connected to a tap for tap water is connected from the upper side Z1, and tap water is supplied into the outer tub 3 from the water supply channel 20. A water supply valve 21 that opens and closes in order to start or stop water supply is provided in the middle of the water supply path 20. The drain passage 22 is connected to the bottom wall 3B of the outer tub 3 from the lower side Z2, and the water in the outer tub 3 is drained from the drain passage 22 to the outside of the machine. A drain valve 23 that opens and closes in order to start or stop draining is provided in the middle of the drain channel 22.

The inner tub 4 is made of metal, for example, and is formed into a cylindrical shape with a bottom that is slightly smaller than the outer tub 3, and can contain the laundry Q inside. The inner tub 4 has a substantially cylindrical circumferential wall 4A arranged in the vertical direction Z and a bottom wall 4B provided at the lower end of the inner tub 4 and blocking the hollow portion of the circumferential wall 4A from the lower side Z2.

The inner peripheral surface of the circumferential wall 4A is the inner peripheral surface of the inner tub 4. The upper end portion of the inner peripheral surface of the circumferential wall 4A is an access port 24 that exposes the hollow portion of the circumferential wall 4A toward the upper side Z1. The entrance and exit 24 are formed at the upper end of the inner tub 4. The port 24 is in a state of being opposed to and communicating with the port 18 of the tub 3 from the lower side Z2. The user allows the laundry Q to enter and exit the inner tub 4 from the upper side Z1 through the opened opening 15, the entrance 18, and the entrance 24.

The inner tub 4 is coaxially accommodated in the outer tub 3. The inner tub 4 in the state accommodated in the outer tub 3 can rotate around an axis J that forms its central axis and extends in the vertical direction Z. In addition, the circumferential wall 4A and the bottom wall 4B of the inner tub 4 are formed with a plurality of through holes 4C, and the water in the outer tub 3 can pass between the outer tub 3 and the inner tub 4 through the through holes 4C. Therefore, the water level in the outer tub 3 is consistent with the water level in the inner tub 4.

The bottom wall 4B of the inner tub 4 is formed in the shape of a circular plate extending substantially parallel to the bottom wall 3B of the outer tub 3 at an interval on the upper side Z1, and a through bottom wall is formed in the center of the bottom wall 4B that coincides with the axis J 4B through hole 4D. The bottom wall 4B is provided with a tubular support shaft 25 extending along the axis J to the lower side Z2 while surrounding the through hole 4D. The support shaft 25 is inserted through the through hole 3D of the bottom wall 3B of the outer tub 3, and the lower end of the support shaft 25 is located on the lower side Z2 than the bottom wall 3B.

The rotating wing 5 is a so-called pulsator, formed in a disk shape centered on the axis J, and is arranged on the bottom wall 4B in the inner tub 4 so as to be concentric with the inner tub 4. A plurality of blades 5A arranged radially are formed on the upper surface of the rotary wing 5 facing the entrance and exit 24 of the inner tub 4. The rotating wing 5 is provided with a rotating shaft 26 extending from its center along the axis J to the lower side Z2. The rotating shaft 26 is inserted through the hollow portion of the support shaft 25, and the lower end of the rotating shaft 26 is located on the lower side Z2 than the bottom wall 3B of the outer tub 3.

The motor 7 is an electric motor such as an inverter motor. The motor 7 is arranged on the lower side Z2 of the bottom wall 3B of the tub 3 in the box 2. The motor 7 has an output shaft 30 protruding to the upper side Z1 and rotating around the axis J, and outputs the generated driving force from the output shaft 30.

The brake clutch mechanism 8 includes, for example, a known brake (not shown) composed of a brake band or the like and a known clutch (not shown). The brake clutch mechanism 8 incorporates a known deceleration mechanism 31. The output shaft 30 of the motor 7 is connected to the lower end of the support shaft 25 of the inner tub 4 via a clutch in the brake clutch mechanism 8. The output shaft 30 and the support shaft 25 constitute a transmission path of the driving force from the motor 7 to the inner tub 4. The clutch cuts off or communicates with the transmission path. The output shaft 30 is connected to the lower end of the rotating shaft 26 via the speed reduction mechanism 31. Therefore, when the motor 7 is operating, the rotating wing 5 connected to the rotating shaft 26 rotates at a lower speed than the output shaft 30 by being transmitted with the driving force of the motor 7.

The motor 7 and the brake clutch mechanism 8 constitute a drive unit 32. The output shaft 30 of the motor 7 may be directly connected to the support shaft 25 of the inner tub 4, and the driving part 32 in this case may have at least the motor 7. The driving part 32 is arranged on the lower side Z2 of the bottom wall 3B of the outer tub 3. Specifically, the motor 7 is arranged such that the center of the output shaft 30 coincides with the axis J, and the brake clutch mechanism 8 is arranged between the bottom wall 3B of the tub 3 and the motor 7.

The vertical washing machine 1 includes a control unit 35 built in a cabinet 2 as a microcomputer including a CPU, ROM, RAM, and the like. The control unit 35 executes the washing operation by controlling the actions of the motor 7, the brake clutch mechanism 8, the water supply valve 21, the drain valve 23, and the like. The washing operation has: a washing process to wash the laundry Q; a rinsing process to rinse the laundry Q after the washing process; and a dehydration process in which the inner tub 4 is rotated to spin the laundry Q after the rinsing process.

In the cleaning process, with the drain valve 23 closed, the control unit 35 opens the water supply valve 21 for a predetermined period of time to store water in the outer tub 3 and the outer tub 4 to a predetermined water level, and then operates the motor 7 to rotate the rotary wing 5 . Thereby, the laundry Q in the inner tub 4 is stirred by the mechanical force of the blade 5A of the rotating rotor blade 5 and the mechanical force of the water flow generated in the inner tub 4 as the rotor blade 5 rotates. By this stirring, dirt is removed from the laundry Q. It should be noted that the control unit 35 may also rotate the inner tub 4 together with the rotary wing 5 by controlling the operation of the clutch of the brake clutch mechanism 8. In addition, detergent may be poured into the inner tub 4, and in this case, the laundry Q in the inner tub 4 is decontaminated by the detergent. When the predetermined washing time has elapsed, the control unit 35 activates the brake of the brake clutch mechanism 8 to stop the rotating wing 5, opens the drain valve 23 to drain the outer tub 3 and the inner tub 4, and ends the washing process.

During the rinsing process, with the drain valve 23 closed, the control unit 35 rotates the rotary wing 5 after opening the water supply valve 21 for a predetermined time to store water to the outer tub 3 and the inner tub 4 to a predetermined water level. Thus, the laundry Q in the inner tub 4 is rinsed. When the predetermined rinsing time has elapsed, the control unit 35 stops the rotary wing 5, opens the drain valve 23 to drain the outer tub 3 and the inner tub 4, and ends the rinsing process. The rinsing process can also be performed multiple times.

During the dehydration process, the control unit 35 operates the motor 7 with the drain valve 23 opened to rotate the inner tub 4 at a high speed at a predetermined dehydration rotation speed. The laundry Q in the inner tub 4 is dehydrated by the centrifugal force generated by the high-speed rotation of the inner tub 4 at the dehydration rotation speed. The water seeping out from the laundry Q by the dehydration is discharged from the drainage channel 22 to the outside of the machine. The control unit 35 stops the motor 7 after rotating the inner tub 4 at a high speed for a predetermined period of time, and operates the brake of the brake clutch mechanism 8 to stop the inner tub 4. The dehydration process can also be implemented as an intermediate dehydration process after the washing process. In addition, in the case of implementing multiple rinsing processes, the intermediate dehydration process may also be implemented after each rinsing process other than the final rinsing process. Distinguishing the dehydration process that is finally performed after the final rinsing process from the intermediate dehydration process is called the final dehydration process. The dehydration speed in the final dehydration process may be higher than the dehydration speed in the intermediate dehydration process.

The vertical washing machine 1 further includes: a cover 40 installed on the bottom wall 3B of the outer tub 3 and covering the driving portion 32; a sound insulation member 41 installed on the cover 40; and a cushioning member 42 arranged on the

lower surface

3E and 3E of the bottom wall 3B Between the hood 40.

2, the cover 40 integrally has a cylindrical portion 40A and a closing portion 40C that closes the internal space 40B of the cylindrical portion 40A from the lower side Z2, and is made of metal, for example, made of a metal plate. The tube portion 40A is a polygonal tube having a polygonal outline in a plan view, and is arranged coaxially with the axis J. The cylindrical portion 40A in the present embodiment is configured by arranging eight vertical plates 43 in the shape of a rectangular flat plate that are long in the vertical direction Z in a ring shape surrounding the axis J. Therefore, the cylindrical portion 40A has an octagonal outline in a plan view.

Among the eight vertical plates 43, the upper ends of a pair of vertical plates 43A facing each other across the axis J are provided with a rectangular plate-shaped first flange portion 43B protruding to the outside of the radial direction R based on the axis J. . The first flange portion 43B has a plate thickness direction that coincides with the vertical direction Z, and the short side along the upper side Z1 in the vertical plate 43A is the long side. At both ends in the longitudinal direction of the first flange portion 43B, insertion holes 43C that penetrate the first flange portion 43B in the vertical direction Z are formed one by one. The upper end surface of the first flange portion 43B and the upper end surface of the vertical plate 43A provided with the first flange portion 43B are arranged to be coplanar.

The upper end of each of the six vertical plates 43 other than the pair of vertical plates 43A is provided with a rectangular plate-shaped second flange portion 43D protruding outward in the radial direction R. As shown in FIG. The second flange portion 43D is smaller than the first flange portion 43B by one turn or more, and is provided in the middle of the short side of the upper side Z1 in the corresponding vertical plate 43. The upper end surface of the second flange portion 43D and the upper end surface of the vertical plate 43 provided with the second flange portion 43D are arranged to be coplanar.

The upper end surface of the upper end portion 40D of the cylindrical portion 40A is configured in a ring shape by the upper end surface of the eight vertical plates 43, the upper end surface of each first flange portion 43B, and the upper end surface of each second flange portion 43D. In the present embodiment, the entire area of the upper end surface of the upper end portion 40D is arranged to be coplanar and flat, but a slight height difference may be provided somewhere in the upper end surface of the upper end portion 40D.

The inner surface portion 43E of each of the eight vertical plates 43 facing the internal space 40B of the cylindrical portion 40A is a rectangular flat surface extending in the up-down direction Z as one of the main surfaces of the vertical plates 43. The eight vertical plates 43 are arranged in a ring shape so as to form eight sides of the octagon in a plan view. Therefore, the internal space 40B partitioned by the inner surface portion 43E of these vertical plates 43 has an octagonal cylindrical shape. In addition, the inner surface portion 40E of the cover 40 is composed of the inner surface portions 43E of the vertical plates 43, that is, a plurality of flat surfaces.

The outer surface portion 43F of each vertical plate 43 opposite to the inner surface portion 43E is a rectangular flat surface extending in the up-down direction Z as the main surface of the other of the vertical plates 43. One or more substantially triangular plate-shaped reinforcement portions 43G connected to the outer surface portion 43F of the corresponding vertical plate 43 are provided on the lower end surface of each of the first flange portion 43B and the second flange portion 43D.

The closing portion 40C has a flat plate shape having a plate thickness direction that coincides with the vertical direction Z, and has an octagonal shape having eight sides connected to the lower ends of the eight vertical plates 43 in a plan view. The upper surface portion 40F and the lower surface portion 40G (refer to FIG. 1) of the closing portion 40C are flat surfaces extending front, back, left, and right, respectively. The upper surface portion 40F is one of a plurality of flat surfaces constituting the inner surface portion 40E of the cover 40. Therefore, the inner surface portion 40E is composed of nine flat surfaces, that is, the inner surface portion 43E of the eight vertical plates 43 and the upper surface portion 40F of the closed portion 40C.

The soundproof member 41 is made of special rubber, specifically, a sheet made of acrylic rubber, and is attached so as to cover the entire area of the inner surface portion 40E of the cover 40 as shown by the points indicated in FIG. 2. There are a plurality of sound insulation members 41 corresponding to the inner surface portion 43E of each vertical plate 43 and the upper surface portion 40F of the closing portion 40C, and they are pasted to the corresponding portions of the inner surface portion 43E and the upper surface portion 40F one by one. Both the inner surface part 43E and the upper surface part 40F which comprise the inner surface part 40E are flat surfaces. Therefore, the sound insulation member 41 attached to the inner surface portion 43E has a rectangular flat plate shape along the inner surface portion 43E. The soundproof member 41 attached to the upper surface portion 40F has an octagonal flat plate shape along the upper surface portion 40F.

The buffer member 42 is made of rubber, for example, and is stuck to the entire area of the upper end surface of the upper end portion 40D. The shape of the buffer member 42 in a plan view coincides with the shape of the upper end surface of the upper end portion 40D of the cylindrical portion 40A. Therefore, the buffer member 42 is integrally provided with: an annular portion 42A, which extends the upper end of the eight-piece vertical plate 43 of the cylindrical portion 40A; and a plurality of protrusions 42B, which protrude from the annular portion 42A, and are respectively connected to the upper side Z1 The first flange portion 43B or the second flange portion 43D overlaps. The protrusion 42B overlapping the first flange 43B is formed with an insertion hole 42C that penetrates the protrusion 42B in the vertical direction Z and is connected to the insertion hole 43C of the first flange 43B from the upper side Z1.

The upper end surface of the buffer member 42 is constituted in a ring shape by the upper end surface of the annular portion 42A and the upper end surface of each protrusion 42B. In the upper end surface of the cushioning member 42 in this embodiment, a slight height difference is provided by forming a shallow recess 42D in the second flange portion 43D and its peripheral area, but the upper end surface of the cushioning member 42 may be arranged in the entire area. Coplanar and flat.

As shown in FIG. 3, the above-mentioned cover 40 is attached to the lower surface part 3E of the bottom wall 3B of the outer tub 3 from the lower side Z2. Specifically, in the lower surface portion 3E, although a plurality of ribs 3G are provided in the outer peripheral area 3F, the central area 3H surrounded by the outer peripheral area 3F is relatively flat, and the upper end portion 40D of the cylindrical portion 40A of the cover 40 is attached to the central area 3H. In this state, the upper end surface of the upper end portion 40D of the cylindrical portion 40A, that is, the upper end surface of each of the vertical plates 43, the first flange portion 43B, and the second flange portion 43D, opposes the lower surface portion 3E from the lower side Z2 It is arranged so that the cushioning member 42 is sandwiched between the upper end surface and the lower surface portion 3E to compress it. Thereby, the gap between the upper end 40D of the cylindrical portion 40A and the lower surface portion 3E is in a state of being blocked by the cushioning member 42 arranged between the upper end portion 40D of the cylindrical portion 40A and the lower surface portion 3E.

In each insertion hole 43C of the first flange portion 43B, bolts B are inserted one by one from the lower side Z2, and the bolts B pass through the insertion holes 42C of the buffer member 42 and are attached to the bottom wall 3B. Thereby, the cover 40 is in the state fixed to the bottom wall 3B. In addition, in the cover 40, the cylindrical portion 40A is in a state in which the driving portion 32 is non-contactedly enclosed from the outside in the radial direction R in detail, and the closing portion 40C is in a non-contacting manner to cover the driving portion from the lower side Z2. The state of section 32. That is, the driving unit 32 is arranged in the internal space 40B of the cover 40. Therefore, the inner surface part 40E of the internal space 40B in the cover 40 is in the state which faced the drive part 32 via the sound insulation member 41 (refer FIG. 1).

As described above, in the cover 40, the cylindrical portion 40A surrounds the drive portion 32 arranged on the lower side Z2 of the bottom wall 3B of the outer tub 3, and the closing portion 40C blocks the drive portion 32 arranged in the cylindrical portion 40A from the lower side Z2. On this basis, the upper end portion 40D of the cylindrical portion 40A is installed on the lower surface portion 3E of the bottom wall 3B. Therefore, the cover 40 is in a state of covering the driving portion 32 in a nearly airtight state. Furthermore, the soundproof member 41 is attached to the inner surface portion 40E of the cover 40. As a result, the operating sound of the driving unit 32 in the cover 40 can be prevented from leaking to the outside.

In order to ensure the necessary sound insulation, it is preferable that the hardness of the sound insulation member 41 measured by an A-type hardness meter is A95 or more. The soundproof member 41 having this hardness is not easily deformed. However, if the inner surface portion 40E is composed of a plurality of flat surfaces as described above, compared to the case where the inner surface portion 40E is composed of a curved surface, even if the sound insulation member 41 is not deformed, it can be easily and reliably installed in the inner surface portion 40E. Surface part 40E. In addition, the cushioning member 42 disposed between the cylindrical portion 40A and the lower surface portion 3E of the bottom wall 3B of the outer tub 3 can prevent the cover 40 from loosening. In addition, the combination of the cover 40 and the sound-insulating member 41 can improve the sound insulation of operating sound of low-medium frequency, especially 500 Hz or less.

In this way, the cover 40 is a soundproof cover that insulates the operating sound of the driving unit 32. In addition, the cover 40 also functions as a general motor cover. When the vertical washing machine 1 is transported, for example, a protector (not shown) made of styrene foam is installed in the box 2 through an opening 2B (refer to FIG. 1) formed at the bottom of the box 2 to serve as a motor cover The functional cover 40 positions the protector so that it does not contact the driving portion 32 and the tub 3.

The present invention is not limited to the embodiments described above, and various modifications can be made within the scope described in the technical solution.

For example, the cover 40 may be formed with holes or notches through which the water supply and drainage channels 22 and wiring (not shown) pass. However, in order to prevent the operating sound of the driving unit 32 from leaking from these holes and notches, it is preferable that the gaps around the drainage channel 22 and the wiring be filled with a sealing material such as a sponge.

In the above-mentioned embodiment, the cover 40 has an octagonal cylindrical shape, but it may also have other polygonal cylindrical shapes such as a hexagonal cylindrical shape. In addition, in the cylindrical portion 40A of the cover 40, the inner surface portion may be composed of a plurality of flat surfaces, and the outer surface portion of the cylindrical portion 40A may be a circumferential surface.

In addition, in the above-described embodiment, the axis J, which is the center of rotation of the inner tub 4, extends vertically in this embodiment, but it may be arranged obliquely with respect to the vertical direction.

Claims

A vertical washing machine, characterized in that it comprises:

The inner bucket contains the laundry and can rotate;

The outer tub contains the inner tub and has an upper end portion and a lower end portion, the upper end portion is formed with an inlet and outlet for washings to enter and exit the inner tub, and the lower end portion is provided with a bottom wall;

The driving part has at least a motor that generates a driving force for rotating the inner tub, and is arranged on the lower side of the bottom wall;

A cover having a cylindrical portion and a closing portion, the cylindrical portion having an upper end portion attached to the lower surface portion of the bottom wall and surrounding the driving portion, the closing portion blocking the inner space of the cylindrical portion from the lower side ;as well as

The soundproof member is installed in the inner surface part of the cover facing the driving part.
The vertical washing machine according to claim 1, wherein:

The inner surface portion of the cover is composed of a plurality of flat surfaces.
The vertical washing machine according to claim 1 or 2, characterized in that:

It further includes a buffer member arranged between the tube portion and the lower surface portion.