JPH11207077A - Rotary drum type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary drum type washing machine provided a rotary drum for facilitating assembly, separation and a maintenance inspection. SOLUTION: In this rotary drum type washing machine, the rotary drum 6 is housed in a double cylinder shape in a water tank 4 elastically supported inside an outer box and the rotary drum 6 is supported by a rotary shaft 10 passed through the back wall center part of the water tank 4 and rotatably supported by bearings 28 and 29 provided on the back wall part and is rotated by the driving power of a driving motor. A drum flange 24 is detachably fixed to the tip of the rotary shaft 10 facing the inner side of the water tank 4 by a bolt 25, the back wall 6b of the rotary drum 6 is detachably fixed to the drum flange 24 by the bolt 26 and the bolts 25 and 26 are covered with a hidden plate 34 provided on the inner part side of the back wall 6b of the rotary drum 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating drum type washing machine having a horizontally arranged rotating drum for washing.

[0002]

2. Description of the Related Art A conventional rotary drum type washing machine has a structure as shown in FIGS. 1 and 2 are a front sectional view and a side sectional view of a rotating drum type washing machine.
FIG. 3 is a detailed view of a connecting portion between the rotating drum 6 and the rotating shaft 10.

According to these figures, a laundry input port 2 attached to an outer box 1 is opened and closed by a lid 3, and a water tub 4 elastically supported by a vibration isolating mechanism 5 is provided in the outer box 1. ing. The rotating drum 6 rotates around a rotating shaft 10 that passes through the back wall of the water tub 4 horizontally, and supplies a large number of water to supply water for washing, drainage for dehydration, and hot air for drying to the entire outer peripheral wall. A small hole (not shown) is provided, and three stirring blades 6a are provided on the inner wall at equal intervals. The rotating drum 6
Is rotated by a drive motor 7 via a belt 8, a pulley 9, and a rotating shaft 10.

A water supply hose 11 is connected to a water supply pipe 13 via a water supply valve 12 at an upper portion of the water tank 4. When the water supply valve 12 is opened, water is supplied to the water tank 4 through the water supply pipe 13 and the detergent case 14. The water tank 4 is located below the water tank 4.
A filter case 16 is provided in the middle of the path of the drain duct 15 led out from the bottom surface of the filter case, and is provided with a filter 17 for removing lint and dust.

The filter case 16 is connected to a circulation pipe 18 having a circulation pump 19 for circulating washing water in the tub 4 and a drain pipe 20 having a drain pump 21 for draining the washing water in the tub 4. When the washing water stored in the water tub 4 is circulated, the washing water in the water tub 4 passes through the drain pipe 20 through the filter 17 in the filter case 16 to remove dust and the like. Will be returned. When draining the washing water in the water tub 4, the drain pump 21 branched from the filter case 16 is used.
The washing water is drained out of the machine through the drain pipe 20.

In the case of having a drying function, a drying unit 23 is provided in the outer box 1, and a blowing fan and a heater (not shown) are provided in the drying unit 23. The exhaust gas in the water tub 4 taken into the drying unit 23 from the exhaust duct 22a communicating with the side surface of the water tub 4 is dried and sent into the water tub 4 through the ventilation duct 22b to dry the laundry.

Next, the details of the connection between the rotating drum 6 and the rotating shaft 10 will be described with reference to FIG. The rotary drum 6 is driven to rotate by a drive motor 7 via a pulley 9 and a rotary shaft 10. On the back of the rotary drum 6, a drum flange 24 having a radiation arm formed of aluminum die-casting is provided. Is fitted to the drum flange 24
Is fixed to the rotating drum 6 with bolts 37.

The rotary shaft 10 is formed integrally with the drum flange 24 so as to be cast into the drum flange 24, and has an outer peripheral portion at the center of the back of a back wall plate 4 a fixed to the water tank 4 with bolts 38. The above-mentioned pulley 9 is fixed to the other end while being inserted and supported by bearings 28 and 29 provided.

[0009]

The conventional rotating drum type washing machine is constructed as described above. However, since the rotating drum 6 is fixed to the inner wall of the water tub 4 by bolts 37, it is fixed. It is difficult to connect and separate the drum flange 24 and the drum
Since the rotary shaft 6 is integrally formed, the rotary shaft 6 can be detached from the water tank 4 at the time of assembling the rotary drum 6 or performing maintenance and inspection.

For this reason, the assembly or maintenance and inspection of the rotary drum 6 is complicated, and the fitting state between the bearings 28 and 29 and the rotary shaft 10 must be loose and a gap is generated. , 29 and the rotating shaft 10 are liable to be deviated in coaxiality and rattle, and when the bearings 28, 29 and the rotating shaft 10 are damaged or clothes are centrifugally dewatered at a high speed, the rotating drum 6 has a large size. There was a problem that caused swing.

The drum flange 24 and the rotating shaft 10 are formed by integral molding such as casting of stainless steel or the like because of the strength and the need for rust prevention. I was Water tank 4
Since the housing portions of the bearings 28 and 29 are integrally formed on the back wall plate 4a, the weight increases and the shape is complicated, which causes an increase in manufacturing cost.

An object of the present invention is to provide a rotary drum type washing machine which facilitates the assembly and maintenance of the rotary drum, improves the coaxial accuracy between the rotary drum and the rotary shaft, and does not rattle when the rotary drum rotates. Aim.

Another object of the present invention is to provide a rotary drum type washing machine with low manufacturing cost.

[0014]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a water tank elastically supported in an outer box, in which a rotary drum is housed in a multi-tubular shape, and the rotary drum is mounted on the water tank. In a rotary drum type washing machine which is supported by a rotation shaft rotatably supported by a bearing provided on the back wall portion through the back wall center portion and rotated by the driving force of a drive motor, A drum flange and a back wall of the rotating drum are detachably fixed to a tip facing the inside of the water tank by fixing means, and a shielding member that hides the fixing means is provided on a back wall inside the rotating drum. ing.

According to this configuration, the rotary shaft and the drum flange are divided, and the drum flange and the rotary drum are integrally fixed detachably from the front surface, and this fixing means is provided on the inner side of the back wall of the rotary drum. It will be covered by the provided shielding member.

Further, according to the present invention, a rotary drum is accommodated in a water tank elastically supported in an outer box, and the rotary drum is penetrated through a center portion of a back wall of the water tank. In a rotary drum type washing machine supported by a rotating shaft rotatably supported by a bearing provided at the bearing provided and rotated by the driving force of a driving motor, a drum flange is provided at a tip of the rotating shaft facing the inside of the water tank. A first fixing means for detachably fixing, a back wall of the rotary drum to the drum flange detachably fixed by second fixing means, and a cover for concealing the first and second fixing means; A member is provided on a back wall surface inside the rotary drum.

According to this configuration, the rotary shaft and the drum flange are divided and the drum flange is detachably fixed to the tip of the rotary shaft facing the inside of the water tank, and the back wall of the rotary drum is detachably fixed to the drum flange. In addition, these two fixed portions are covered by a shielding member provided on the inner side of the back wall of the rotating drum.

Further, in the present invention, an uneven portion is provided on a surface of the shielding member facing the inside of the water tank. According to this configuration,
When the rotating drum rotates, the uneven portion of the shielding member stirs the laundry conveniently.

In the present invention, the rotary shaft is press-fitted into the bearing located on the water tank side in the axial direction of the rotary shaft. According to this configuration, the rotating shaft is press-fitted into at least the bearing on the water tank side and is rotatable without any gap.

The present invention also provides a water tank resiliently supported in an outer box, in which a rotary drum is accommodated in a multi-tubular shape, and the rotary drum penetrates a center portion of a back wall of the water tank and is attached to the back wall portion. In a rotating drum type washing machine supported by a rotating shaft rotatably supported by a bearing provided and rotated by the driving force of a driving motor, a through hole through which the rotating shaft is inserted is formed in a central portion, and A bearing fixing member in which two frame plates each having a bearing receiving portion formed on the outer periphery of the through-hole are overlapped and fixed is arranged behind the back wall plate of the water tank, and the bearing fixing member and the back wall plate of the water tank are fixed. ing.

According to this configuration, the back wall plate surface of the water tank and the bearing fixing portion that supports the rotating shaft via the bearing are divided, and the bearing fixing portion fixes two plates formed by sheet metal forming or the like. It is composed.

In the present invention, the frame plate is made of a steel plate.
According to this configuration, a steel plate is used for the bearing fixing member located behind the water tank back wall plate surface that does not come into contact with water.

The present invention also provides an opening for inserting the rotating shaft through the back wall plate surface of the water tank, a plurality of circular ribs sequentially formed concentrically around the opening, A plurality of radial ribs formed at substantially equal intervals in a circumferential direction; a plurality of sector portions formed between the radial ribs and having an open surface inside or outside the water tank; and the circular ribs or the radial ribs And a plurality of mounting bosses formed thereon, and the bearing fixing member is fixed to the mounting boss.

According to this configuration, the back wall plate of the water tank is formed by a method such as forming while securing sufficient strength by the circular ribs and the radial ribs, and the water tank is made rotatable by being connected to the bearing fixing member. ing.

[0025]

Embodiments of the present invention will be described below in detail with reference to the drawings. The same members as those in the conventional example are denoted by the same reference numerals. FIG. 4 is a cross-sectional view showing a joint between the rotating shaft 10 and the rotating drum 6 according to the first embodiment. In the figure, a drum flange 24 is fixed to a back wall 6 b of the rotating drum 6 with bolts 25.

The center of the drum flange 24 penetrates through an opening 4c provided in the back wall of the water tank 4, and the water tank 4
The tip of the rotating shaft 10 with the tip inserted therein is a bolt 26
Is fixedly connected. In the present embodiment, the bolt 26 faces the inside of the rotary drum 6 through an opening 6c provided at the center of the back wall 6b of the rotary drum 6.

The rotary shaft 10 is supported by bearings 28 and 29 arranged in the front and rear directions in the axial direction, and a pulley 9 is fixed to an end opposite to the rotary drum 6 by bolts 30. Bearing 28, 2
Reference numeral 9 is fitted to bearing receiving portions 31b, 32b formed at the center of frame plates 31, 32 provided on the back wall of the water tank 4.

The frame plates 31 and 32 are formed by sheet metal forming a plate-like body having steel plates having through holes 31a and 32a at the center, and bearing receiving portions 31b and 32b are formed on the outer periphery of the through holes 31a and 32a. It is constituted by doing. The frame plates 31 and 32 are bolted to each other with the outer periphery thereof being bolted to each other in a state where the frame plates 31 and 32 are overlapped so as to close the opening surfaces.
a, 33b. The frame plates 31 and 32 are fixed by bolts 33a, and are fixed to mounting bosses 4b provided on the back wall of the water tank 4.

In the figure, the bolts 35 and 26 are fixed to the back wall 6b of the rotary drum 6 with bolts 35, and are covered and covered by the concealing plates 34 (shielding members) made of plastic. The washing water in the water tub 4 is sealed by an oil seal 27 press-fitted between the water tub 4 and the rotating shaft 10.

According to such a configuration, since the rotating drum 6 and the drum flange 24 are fixed from the front, they can be easily attached and detached, maintenance and inspection are easy, and the bolts 25 and 26 are covered by the hidden plate 34. It does not hurt the laundry.

Further, the drum flange 24 can be reduced in size, and the drum flange 24 and the rotating shaft 10 are divided, so that the weight can be reduced, the processing can be facilitated, and the manufacturing cost can be reduced. Further, since the drum flange 24 and the rotary shaft 10 are divided, even if the rotary shaft 10 is press-fitted into the bearing 28, there is no problem in maintenance and inspection, and the rotation accuracy of the rotary drum 6 can be improved.

Further, the surface of the back wall plate 4a of the water tank and the bearing fixing portions (frame plates 31, 32) are divided, and the frame plates 31, 32 are formed of plate materials, so that the weight can be reduced and the processing is easy. Become. Further, since the bearing fixing portion does not come into direct contact with water, rust prevention is not strictly required, and the material can be freely selected. If an inexpensive steel plate or the like is used, manufacturing costs can be reduced.

FIG. 5 is a side sectional view of a main part of a second embodiment of the present invention relating to the connection between the rotary drum 6 and the rotary shaft 10. As shown in FIG. In the present embodiment, the hidden plate 34 is formed of a stainless steel plate in a dish shape, and is fitted to the opening 6 c of the back wall of the rotating drum 6. According to such a configuration, there is an advantage that the waste material cut out when processing the front opening of the rotary drum 6 can be used, the waste material can be reduced, the recycling can be promoted, and the material cost can be reduced.

FIG. 6 is a side sectional view showing a main part of a third embodiment of the present invention. In the present embodiment, the opening 6c of the rotary drum 6 provided in the first and second embodiments is not provided,
The tip of the rotating shaft 10 is fixed to the back wall 6b of the rotating drum 6 with a bolt 26 via a drum flange 24. Then, the bolts 26, 26 exposed on the inner side of the rotary drum 6
Is covered with the concealing member 36, and the same effects as in the first and second embodiments can be obtained.

Next, FIG. 7 is a side sectional view of a main part showing a fourth embodiment of the present invention. The overall configuration of this embodiment is the same as that of the first embodiment. The difference from the first embodiment is that the surface of the hidden plate 34 is provided with a concave portion 3 as shown in FIG.
4a and the protrusion 34b. According to such a configuration, the laundry is transferred to the uneven portion 3 according to the rotation of the rotating drum 6.
4a and 34b interfere with each other, and in addition to the impact force due to the drop of the laundry itself in the rotating drum 6, a mechanical force equivalent to fir-washing is applied, and the cleaning performance is improved.

Next, FIG. 9 is a side sectional view of a main part showing a fifth embodiment of the present invention. The overall configuration of this embodiment is the same as that of the first embodiment. This embodiment is different from the first embodiment in that the rotating shaft 10 is divided, the front part 10b exposed in the water tank 4 is formed of stainless steel, and the main body part 10a not exposed in the water tank 4 is formed of steel. The front part 10b is configured to be fitted to the front end of the main body part 10a in a stop-fit state.

In this embodiment, the main body 10a of the rotary shaft 10 is rotatably supported by bearings 28 and 29, and the front portion 10b is fixed to the drum flange 24 by bolts 26 and 26. Since the rotating shaft 10 is composed of a portion formed of a steel material and a portion formed of a stainless material, the rotating shaft 10 can be configured at a lower cost than a conventional rotating shaft entirely formed of a stainless material.

Next, FIG. 10 is a schematic front view of a back wall plate 4a of a water tank 4 according to a sixth embodiment of the present invention.
11 and 12 are a sectional view taken along line AA and a sectional view taken along line BB in FIG.

The back wall plate 4a of the water tank 4 is formed by integrally molding a plastic material, and the circular ribs 4 around the circular ribs 41 forming the openings 4c are formed.
2, 43 and 44 are sequentially formed on concentric circles. In particular, 16 radial ribs 45 are provided at substantially equal intervals in the circumferential direction between the circular ribs 43 and 44, and open surfaces are provided between the radial ribs 45 alternately inside and outside the water tank 4. Sector portions 46 and 47 are formed.

As shown in the figure, the center of each of the sector portions 46 and 47 having an open surface inside the water tank 4 is further provided with a reinforcing rib 48 extending in the radial direction of the back wall. The mounting boss 4b is formed at the intersection with the circular rib 43. With such a configuration, the back wall plate 4 of the water tank 4 is formed.
a can be reduced in weight while maintaining sufficient strength.

[0041]

According to the first and second aspects of the present invention, the rotating drum is fixed to the drum flange from the front, so that it can be easily attached and detached, maintenance and inspection can be facilitated, and the fixing means can be fixed by the shielding member. It does not hurt the laundry because it is covered. In addition, when the shielding member uses waste material cut out when processing the front opening of the rotary drum, there is an advantage that waste material can be reduced, recycling can be promoted, and material cost can be reduced. Further, the drum flange can be reduced in size, and the drum flange and the rotating shaft are divided, so that the weight can be reduced, the processing can be facilitated, and the manufacturing cost can be reduced.

According to the third aspect of the present invention, the laundry is interfered by the uneven portion according to the rotation of the rotating drum, and in addition to the impact force caused by the falling of the laundry itself in the rotating drum, the mechanical force corresponding to the fir washing is reduced. As a result, the cleaning performance is improved.

According to the fourth aspect of the present invention, since the drum flange and the rotary shaft are divided, even if the rotary shaft is press-fitted into the bearing, there is no problem in maintenance and inspection. It is possible to prevent the rotation shaft from being damaged and to prevent the rotation drum from oscillating when the clothes are centrifugally dehydrated at high speed.

According to the fifth aspect of the present invention, since the back wall plate surface of the water tank and the bearing fixing portion are divided and the frame plate is formed of a plate material such as a steel plate by sheet metal molding, the weight is reduced and the processing is performed. Becomes easier.

According to the sixth aspect of the present invention, since the bearing fixing portion can be made of an inexpensive steel plate, the manufacturing cost can be reduced.

According to the seventh aspect of the present invention, the weight of the back wall plate of the water tank can be reduced while maintaining sufficient strength, the workability is improved, and the production cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a rotary drum type washing machine.

FIG. 2 is a side sectional view of the rotary drum type washing machine.

FIG. 3 is a side sectional view of a main part of a conventional rotary drum type washing machine.

FIG. 4 is an enlarged side sectional view of a main part of the rotary drum type washing machine according to the first embodiment of the present invention.

FIG. 5 is an enlarged side sectional view of a main part of a rotary drum type washing machine according to a second embodiment of the present invention.

FIG. 6 is an enlarged side sectional view of a main part of a rotary drum type washing machine according to a third embodiment of the present invention.

FIG. 7 is an enlarged side sectional view of a main part of a rotary drum type washing machine according to a fourth embodiment of the present invention.

FIG. 8 is a perspective view of a hidden plate provided in a rotary drum type washing machine according to a fourth embodiment of the present invention.

FIG. 9 is an enlarged side sectional view of a main part of a rotary drum type washing machine according to a fifth embodiment of the present invention.

FIG. 10 is a front view of a back wall of a water tank provided in a rotary drum washing machine according to a sixth embodiment of the present invention.

11 is a sectional view taken along line AA of FIG.

FIG. 12 is a sectional view taken along line BB of FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer box 4 Water tank 4a Back wall plate 6 Rotating drum 10 Rotating shaft 24 Drum flange 25 Bolt 26 Bolt 28 Bearing 29 Bearing 31 Frame 32 Frame 34 Hiding plate 34a Recess 34b Convex portion 36 Hiding member 41, 42, 43, 44 Circular rib 45 Radial rib 46, 47 Sector

Claims (7)

[Claims] 1. A rotary drum is accommodated in a water tank elastically supported in an outer box, and a rotary drum is housed in a double cylinder shape, and the rotary drum is provided on the back wall portion through a center of a back wall of the water tank. In a rotating drum type washing machine supported by a rotating shaft rotatably supported by a bearing and rotated by the driving force of a driving motor, a drum flange and a rotating drum are provided at a tip of the rotating shaft facing the inside of the water tank. A rotating drum type washing machine wherein a back wall is detachably fixed to the back wall by fixing means, and a shielding member for concealing the fixing means is provided on a back wall surface inside the rotating drum. 2. A rotary drum is accommodated in a water tank elastically supported in an outer box. The rotary drum is housed in a double cylinder shape, and the rotary drum is provided on the back wall portion through a center of a back wall of the water tank. In a rotary drum type washing machine supported by a rotating shaft rotatably supported by a bearing and rotated by a driving force of a driving motor, a first flange is fixed to a tip of the rotating shaft facing the inside of the water tank. Means for detachably securing the back wall of the rotating drum to the drum flange by a second means.
And the first and second fixing means.
A rotary drum type washing machine characterized in that a shielding member for concealing the fixing means is provided on a back wall surface inside the rotary drum. 3. The rotary drum type washing machine according to claim 1, wherein an uneven portion is provided on a surface of the shielding member facing the inside of the water tub. 4. The rotary drum type washing machine according to claim 1, wherein the rotary shaft is press-fitted into the bearing located on the water tank side in the axial direction of the rotary shaft. 5. A bearing in which a rotating drum is accommodated in a water tank resiliently supported in an outer case, and a rotating drum is housed in a double cylindrical shape, and the rotating drum penetrates a center portion of a back wall of the water tank and is provided on the back wall portion. In a rotary drum type washing machine supported by a rotating shaft rotatably supported and rotated by the driving force of a drive motor, a through-hole through which the rotating shaft is inserted is formed in a central portion, and the through-hole of the through-hole is formed. A bearing fixing member in which two frame plates each having a bearing receiving portion formed on the outer periphery are overlapped and fixed is disposed behind the back wall plate of the water tank, and the bearing fixing member and the back wall plate of the water tank are fixed. And a rotating drum type washing machine. 6. The rotary drum type washing machine according to claim 5, wherein the frame plate is made of a steel plate. 7. An opening through which the rotating shaft is inserted in the back wall plate surface of the water tank, a plurality of circular ribs sequentially formed concentrically around the opening, and a circumferential direction of the circular rib A plurality of radial ribs formed at substantially equal intervals, a plurality of sector portions formed between the radial ribs and having an open surface inside or outside the water tank, and on the circular ribs or the radial ribs. Providing a plurality of mounting bosses formed,
The rotating drum type washing machine according to claim 5, wherein the bearing fixing member is fixed to the mounting boss.