CN200985438Y - Drum washing machine - Google Patents

Abstract

A drum type washing machine is provided with: a rotating drum that accommodates clothes and has a horizontal or inclined rotating shaft; a water tank that accommodates the rotating drum to rotate freely; a motor that drives the rotating drum; and a bearing that supports the rotating drum so that the the rotary drum is rotatable; and a bearing holding member which holds the bearing and is provided in the bottom of the water tank. The sink has a bottom that supports the rotating drum. The bearing holding member has a flange portion extending in the bottom of the water tank, and an annular rib provided on the flange portion. The sink has a first protrusion disposed proximate to the rib of the bearing retaining member. Accordingly, the front-loading washing machine can standardize the water tank, have higher dehydration performance, and obtain high reliability.

Description

front load washing machine

technical field

The utility model relates to a drum type washing machine provided with a rotating drum, and the rotating drum has a horizontal or inclined rotating shaft.

Background technique

A conventional front-loading washing machine includes a cylindrical rotary drum and a water tank rotatably housed with the rotary shaft of the rotary drum horizontal or inclined. A plurality of water openings are formed on the rotary drum, and a plurality of stirring protrusions protrude toward the inner peripheral wall thereof. By rotating the rotary drum, the laundry accommodated in the rotary drum is caught by the agitating protrusions, lifted up, and dropped from an appropriate height for beating washing. The laundry is centrifugally dehydrated by the high-speed rotation of the rotary drum.

Fig. 4 is a sectional view of a conventional front-loading washing machine disclosed in JP-A-09-215894.

A cylindrical rotating drum 1 serving as both a washing tank and a dehydrating tank has a plurality of water outlets 2 provided on its entire outer peripheral surface, and is rotatably arranged in a water tank 3 . The rotating shaft 4 of the rotary drum 1 is connected with a driven pulley 22 driven by a motor 5 and a belt 21 fixed to the outer bottom of the water tank 3 .

The water tank 3 is supported by hanging down from the ceiling of the outer box 7 by the spring body 8, and is supported by the shock absorber 23 from the bottom to prevent vibration. The rotary shaft 4 that transmits rotation to the rotary drum 1 is supported by a bearing 24 held in a water tank cover 25 fixed to the outside of the back surface of the water tank 3 .

The water tank cover 25 supports the water tank 3 and is provided with an integral or independent member bearing holding portion 25A that supports the bearing 24 that supports the high-speed rotation of the rotary drum 1 . Therefore, the water tank cover 25 is made of a strong material and covers substantially the entire surface of the side surface of the water tank 3 .

In the conventional front-loading type washing machine, the bearing holding portion 25A holding the rotating shaft 4 of the rotating drum 1 is formed into a water tank cover 25 having a size approximately equal to the projected area of the back surface of the water tank 3 in consideration of strength. Fastening screws and the like are installed on the back side of the water tank 3 . Therefore, the bearing holding part 25A is a large, heavy and strong structure, and both the water tank cover 25 and the bearing holding part 25A are expensive.

When the laundry in the rotary drum 1 is piled up unevenly or when the rotational speed is high, the stress in the vicinity of the bearing holding portion 25A of the water tank 3 increases. Since there are places where deformation is concentrated in this part, the rotation speed of the drum is reduced to a level that can reduce the starting performance in an unbalanced state and ensure the limit level of dehydration performance on the basis of ensuring reliability.

The water tank cover 25 needs to be standardized from the viewpoint of productivity even if the washing capacity and spin speed are diversified and the models are diversified. It is difficult to standardize the bearing holding portion 25A or the water tank cover 25, and has high dehydration performance.

Utility model content

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a front-loading washing machine that has a standardized water tank, has higher dehydration performance, and can obtain high reliability. The drum type washing machine of the present utility model comprises: a rotating drum, which accommodates clothes and has a horizontal or inclined rotating shaft; a water tank, which houses the rotating drum and ensures that the rotating drum can rotate freely; a motor, which drives the rotating drum; bearings, It supports the rotary drum so that the rotary drum can rotate; and a bearing holding member which holds the bearing and is provided in the bottom of the water tank. The sink has a bottom that supports the rotating drum. The bearing holding member has a flange portion extending in the bottom of the water tank, and an annular rib provided on the flange portion. The sink has a first protrusion disposed proximate to the rib of the bearing retaining member.

The drum type washing machine can standardize the water tank, has higher dehydration performance, and can obtain high reliability.

Description of drawings

Fig. 1 is a cross-sectional view of a drum-type washing machine according to an embodiment of the present invention;

Fig. 2 is a sectional view of main parts of the front-loading washing machine according to the embodiment;

3 is a cross-sectional view of a water tank of the drum-type washing machine according to the embodiment;

Fig. 4 is a sectional view of a conventional drum-type washing machine.

Detailed ways

Fig. 1 is a cross-sectional view of a front-loading washing machine 31 according to an embodiment of the present invention. FIG. 2 is a sectional view of main parts of the front-loading-type washing machine 31 . FIG. 3 is a cross-sectional view of the water tub 33 of the front-loading washing machine 31 .

In FIGS. 1 and 2 , a water tank 33 is suspended and supported by a suspension 28 and an anti-vibration shock absorber 29 in a housing 32 of a front-loading washing machine 31 . A bottomed cylindrical drum 34 is rotatably disposed in the water tank 33 . The rotation axis of the drum 34 is inclined downward from the front side toward the back side. A water tank cover 36 forming an opening 35 is arranged in front of the water tank 33 , and a clothing inlet and outlet communicating with the opening 35 is formed. The window portion 37 closes the opening portion 35 in a freely openable and closable manner.

A plurality of water openings 39 communicating with the water tank 33 are formed on the peripheral wall of the rotary drum 34 , and a plurality of stirring protrusions 38 are provided on the inner peripheral surface. Drum 34 is rotationally driven in forward and reverse directions by motor 40 attached to the bottom of water tank 33 , motor pulley 41 attached to the shaft of motor 40 , and belt 42 suspended from motor pulley 41 . A drum flange 46 is fixed to the back surface of the rotary drum 34 to hold the rotary drum 34 rotatably. The bearing holding member 43 inserted into the water tank 33 has bearings 53 and 54 . The drum flange 46 is held by the drum shaft 45 pressed into the bearings 53 , 54 . The bearing holding member 43 is provided in the bottom 33B of the water tank 33 .

The bearing holding member 43 has a flange portion 47 extending along its outer peripheral side. The flange portion 47 is provided with a plurality of through holes 47A. An annular rib 48 is provided near the outer periphery of the flange portion 47 . The rib 48 improves the adhesion of the insert molding to the bottom 33B of the water tank 33 .

A first protrusion 49 is formed on the rib 48 close to the bearing holding member 43 on the water tank 33 , and a second protrusion 50 is formed on the outer side thereof. In addition, in order to increase the strength of the water tank 33, a plurality of ribs 33A are formed integrally with the water tank 33 on the outer surface. This increases the strength of the water tank 33 similarly to the water tank cover 25 of the conventional front-loading washing machine shown in FIG. Since the water tank 33 can be processed from materials such as plastic material or aluminum material, productivity can also be improved.

As shown in FIG. 3 , a reinforcing member 51 made of a steel plate or the like is attached to the water tank 33 . The reinforcing member 51 is fixed on the first protrusion 49 disposed close to the rib 48 of the water tank 33 by the first screw 55 , and is further fixed on the second protrusion 50 on the outer peripheral side by the second screw 56 . A first protrusion 49 is formed on the water tank 33 close to the rib 48 .

The operation of front-loading washing machine 31 will be described.

The window 37 is opened to put laundry and detergent into the rotary drum 33 . When the operation of front-loading washing machine 31 is started, water supply valve 44 is energized to fill water tank 33 with a predetermined amount of water for a predetermined time. After that, the rotary drum 34 is rotationally driven by the motor 40 for washing. According to the rotation of rotary drum 34, the laundry accommodated in rotary drum 34 is lifted in the direction of rotation by agitating protrusions 38 provided on the inner peripheral wall of rotary drum 34, dropped from an appropriate height, and the agitation operation is repeated.

Drain the dirty washing liquid after the desired washing time has elapsed. Thereafter, the washing liquid contained in the laundry is centrifuged and dehydrated by the dehydration operation of rotating the rotary drum 34 at a high speed, after which water is poured into the water tank 33 again for rinsing, and finally, dehydration is performed.

In this spin-drying, when the laundry in rotary drum 34 is significantly unbalanced or when the rotational speed is high, the stress in the vicinity of the outer periphery of bearing holding member 43 of water tub 33 increases. On the bearing holding member 43 , there are concentrated places where there is a possibility of deformation.

Since the stress is small in a washing machine with a low dehydration rotation speed, reliability can be ensured without installing the reinforcing member 51 on the water tank 33 .

In the washing machine 31 that performs dehydration at a high speed, the reinforcing member 51 is fixed to the first protrusion 49 near the rib 48 of the bearing holding member 43 in the water tank 33 and the second protrusion on the outside by the first screw 55 and the second screw 56, respectively. Two raised 50 on. The first protrusion 49 is provided along the direction in which the rib 48 of the bearing holding member 43 protrudes. Alternatively, the rib 48 protrudes on an extension line extending the first protrusion 49 . Therefore, the stress in the vicinity of the outer periphery of the bearing holding member 43 of the water tank 33 is relaxed, and it is possible to prevent the concentration of the place where there is a possibility of deformation.

The water tank 33 shared by the high-speed washing machine and the low-speed washing machine for dehydration can be used. In a washing machine with a high spin speed for dehydration, the bearing holding member 43 is inserted into the water tub 33 . After realizing the standardization of the water tank 33, it is possible to pursue higher dehydration performance and ensure reliability.

In the washing machine of this embodiment, the first protrusion 49 capable of fixing the reinforcing member 51 by the first screw 55 is formed on the bearing holding member 43 close to the annular rib 48 provided near the outer periphery of the bearing holding member 43 . For popular drum-type washing machines, use a small bearing holding member based on insert molding to reduce costs, and for advanced models that require higher rotation speed and dehydration performance, fasten the reinforcing member 51 to the bearing with the first screw 55 On the first protrusion 49 of the holding member 43 . Thereby, the reliability of the washing machine can be ensured, and the water tank 33 can be standardized, so it is useful for household and commercial washing machines, washing machines, and the like.

Claims (4)

1. A drum type washing machine, Has: a rotating drum that holds laundry and has a horizontal or inclined axis of rotation; a water tank, which accommodates the rotating drum and ensures that the rotating drum can rotate freely, and has a bottom supporting the rotating drum; an electric motor driving the rotating drum; a bearing provided at the bottom of the water tank, supporting the rotating drum so that the rotating drum can rotate; and a bearing holding member that holds the bearing and is provided in the bottom of the water tank, characterized in that, The bearing retaining member has: a flange extending within said bottom of said sink; and an annular rib provided on the flange portion, The water tank has a first protrusion disposed proximate to the rib of the bearing retaining member. 2. The drum-type washing machine according to claim 1, further comprising: a screw inserted into the first protrusion of the water tank; and a reinforcing member mounted on the water tank by the screw. . 3 . The drum-type washing machine according to claim 1 , wherein the water tank further has a second protrusion provided on an outer peripheral side than the first protrusion. 4 . 4. The drum-type washing machine according to claim 3, further comprising: a first screw inserted into the first protrusion of the water tank; a second screw inserted into the first protrusion of the water tank; the second protrusion; and a reinforcing member mounted on the sink by the first screw and the second screw.

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