JP2012130474A - Drum washing machine - Google Patents

Abstract

Vibration transmission to a housing during a dehydration process is suppressed and vibration of the housing is reduced.
A water tank 2 provided in a housing 1, a drum 3 rotatably provided in the water tank 2, a motor 10 for driving the drum 3 to rotate, a rotating shaft 7 provided at a rear portion of the drum 3, A rotary shaft 7 is rotatably supported, and includes a bearing portion 8 sealed with a rear portion of the water tank 2 and a flexible member 16, and a support base 18 provided in the water tank 2, and the drum 3 is interposed via the bearing portion 8. The springs 19 a and 19 b and the vibration damping dampers 20 a and 20 b are elastically supported by the support base 18, and the water tank 2 is supported by the floor surface 24 by the support base 18.
[Selection] Figure 1

Description

  The present invention relates to a drum type washing machine for washing laundry such as clothes.

  Conventionally, this type of drum-type washing machine is generally configured as shown in FIG. In FIG. 7, a rotating shaft 53 of a drum 52 provided in the water tank 51 is supported by a bearing portion 54 provided on the back surface of the water tank 51, and a motor 55 is connected to a pulley 55 attached to the rotating shaft 53 via a belt 56. The rotation is transmitted and the drum 52 is rotated. The water tank 51 and the drum 52 are provided in a bottomed cylindrical shape, and are disposed in the housing 58 with the rotating shaft 53 of the drum 52 in a substantially horizontal direction. The water tank 51 is supported from below by a pair of left and right vibration damping dampers 60 attached to the base 59 of the housing 58 and elastically supported by a coil spring 61 stretched from the top of the housing 58.

  In the dehydration process, when the drum 52 containing the laundry is rotated at a high speed, the laundry is biased in the drum 52 and unbalance is generated. When the laundry in the drum 52 is in an unbalanced state, a large vibration is generated in the water tank 51 containing the drum 52. In order to suppress the vibration associated with the rotation of the drum 52, the water tank 51 is vibration-proof supported by a vibration-proof damper 60 having a large damping constant to reduce vibration amplitude, and a weight 62 is added to the front part of the water tank 51. (For example, refer to Patent Document 1).

  In addition, in order to suppress the vibration caused by the rotation of the drum from being transmitted to the housing, the water tank is supported from below by a vibration damping damper, and the upper part of the water tank is elastically biased to the front side by the first coil spring, and the water tank It is considered that the lower portion is elastically biased toward the back side by a second coil spring (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 06-327892 JP 2005-137463 A

  However, the conventional configuration has a problem that the transmission rate of vibration to the housing 58 during steady dehydration (about 800 to 1200 r / min) increases due to the weight of the water tank 51 and the weight 62 added to the water tank. It was. In addition, if the water tank 51 swings in a simple vertical direction when the dewatering rotation starts and the whirling vibration at the time of dehydration activation (resonant frequency of the water tank 51) to about 300 r / min, Damping is possible with the vibration damping damper 60.

  However, in the case where the imbalance of the clothing is distributed in the front and rear in the drum 52, and the rotational movement or the swinging vibration in the left-right direction with respect to the center of gravity, a sufficient damping effect cannot be obtained in the movement direction. For this reason, there are problems such as generation of abnormal sound due to abnormal vibration of the water tank 51 and damage due to contact with other members.

  The present invention solves the above-described conventional problems, and provides a drum type washing machine that suppresses vibration transmission to the casing during steady dehydration and effectively reduces the vibration of the water tank during dehydration activation. The purpose is to do.

  In order to solve the conventional problems, a drum-type washing machine according to the present invention includes a water tank provided in a housing, a drum rotatably provided in the water tank, a motor that rotationally drives the drum, and the drum A rotating shaft provided at a rear portion; a bearing portion that rotatably supports the rotating shaft; and a seal portion that is sealed with a flexible member by a rear portion of the water tank; and a support base provided in the water tank; The support is elastically supported by the support with a spring and an anti-vibration damper via the bearing, and the water tank is supported on the floor by the support.

  As a result, the casing and the water tank that is a vibrating body can be separated, and during the dehydration process, the vibration of the drum is suppressed from being transmitted to the casing through the water tank, and the vibration of the casing is reduced. Can do.

  The drum type washing machine of the present invention can suppress the vibration of the drum from being transmitted to the casing through the water tank, and can reduce the vibration of the casing.

Sectional drawing of the drum type washing machine in the 1st Embodiment of this invention Front side perspective view of essential parts of the drum type washing machine Rear side perspective view of the main part of the drum type washing machine Main section enlarged view of the drum type washing machine The principal part expanded sectional view of the drum type washing machine in the 2nd Embodiment of this invention. The main part rear side perspective view of the drum-type washing machine in the 3rd Embodiment of this invention Sectional view of a conventional drum-type washing machine

  The first invention includes a housing, a water tank provided in the housing, a drum rotatably provided in the water tank, a motor for rotationally driving the drum, and a rotating shaft provided at a rear portion of the drum. A bearing portion that rotatably supports the rotating shaft and is sealed with a flexible member and a rear portion of the water tank, and a support base provided in the water tank, wherein the drum is a spring through the bearing portion. And the anti-vibration dampers are elastically supported by the support base, and the water tank is supported on the floor by the support base. The vibration of the drum can be suppressed from being transmitted to the casing through the water tank, and the vibration of the casing can be reduced.

  In the second invention, in particular, a base portion is provided at the bottom of the housing of the first invention, and the support base penetrates the base portion and is supported on the floor surface. This positional relationship can be maintained, and vibration transmission to the housing can be reduced.

  In the third aspect of the invention, in particular, a case supporting portion is provided at the bottom of the case of the first or second aspect of the invention, and the supporting base penetrates the case supporting portion and is supported on the floor surface. Thus, the positional relationship between the housing and the water tank can be maintained, and vibration transmission to the housing can be reduced.

  In the fourth invention, in particular, an elastic body is provided at the bottom of the support base of any one of the first to third inventions, and the floor is supported via the elastic body. Vibration transmission can be reduced.

  In the fifth aspect of the invention, in particular, an elastic body is provided on the outer peripheral portion of the support base of any one of the first to fourth aspects of the invention, and the base portion or the casing support portion is contacted via the elastic body. Thus, vibration transmission to the housing can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a drum type washing machine according to a first embodiment of the present invention, FIG. 2 is a front perspective view of a main part of the drum type washing machine, and FIG. 3 is a main part of the drum type washing machine. FIG. 4 is an enlarged sectional view of a main part of the drum type washing machine.

  1 to 4, a water tank 2 for storing washing water is disposed in a casing 1 that forms an outer shell of a drum type washing machine. A bottomed cylindrical drum 3 for storing laundry is rotatably provided in the water tank 2. A plurality of baffles 4 and a plurality of through holes 5 communicating with the inside of the water tub 2 are provided on the inner peripheral wall surface of the drum 3, and an opening 6 for taking in and out the laundry is provided on the front side.

  A rotating shaft 7 that rotates and supports the drum 3, a bearing portion 8 that supports the rotating shaft 7, and a pulley 9 that is fixed to the rotating shaft 7 are coaxially attached to the drum 3. It is transmitted to the rotary shaft 7 through the belt 11 and rotationally drives the drum 3. The rotating shaft 7 is set in a substantially horizontal direction.

  The water tank 2 is provided in a cylindrical shape having an opening on the front side and the back side, and the front side is provided with an inlet 12 facing the opening 6 of the drum 3. An openable / closable lid 13 that opens and closes the charging port 12 is provided in the casing 1 so as to face the charging port 12. The lid 13 is opened and closed to allow laundry to be taken in and out of the drum 3. The casing 1 and the water tank 2 are sealed by a window packing 14 provided between the water tank 2 and the water tank 2 to prevent water leakage outside the apparatus.

  A rear wall 8a formed in a disk shape from the bearing 8 toward the opening peripheral edge 2a of the water tank 2 is disposed on the back side of the water tank 2, and a disk-shaped water seal provided on the front side of the rear wall 8a. The peripheral edge of the plate 15 and the open peripheral edge 2a of the water tank 2 are water-tightly sealed with a flexible member 16 formed in an annular shape. The flexible member 16 is formed of packing such as rubber that is elastically deformed.

  Two support arms 17 are provided on the rear wall 8a of the bearing portion 8 so as to extend downward downward. The support arm 17 is formed in a substantially L-shape, and has an arm portion 17a that extends substantially parallel to the opening 6 side of the drum 3 below the water tank 2, that is, from the back surface side of the water tank 2 to the inlet 12 side. It has a predetermined interval in the direction.

  The water tank 2 has a support base 18 fixed to the outer peripheral surface. The support base 18 has a vertical portion 18a extending downward on the front side of the aquarium 2 and a horizontal portion 18b extending substantially horizontally in the front-rear direction, and the rear end of the horizontal portion 18b is connected to the back side of the aquarium 2 by a connecting portion 18c. It is connected.

  The bearing portion 8 is elastically supported on the support base 18 at the rear portion of the water tank 2 by a coil spring 19a and a vibration damping damper 20a installed between the rear wall 8a and the support base 18, and abuts the connecting portion 18c from below. .

  The two arm portions 17a are located below the rotary shaft 7, are provided substantially above and in parallel with the horizontal portion 18b of the support base 18, and the water tank 2 is formed by a pair of left and right coil springs 19b and a vibration damping damper 20b. Is supported by the horizontal portion 18b of the support base 18 at the front portion thereof.

Further, a pair of lateral vibration damping dampers 21 extending in a substantially horizontal direction are provided on the left and right sides of the bearing portion 8, and a protrusion 8 b projecting rearward from the rear wall 8 a of the bearing portion 8 and an opening peripheral edge portion 2 a of the water tank 2. It is erected between them. The lateral vibration of the drum 3 can be suppressed by elastically supporting the drum 3 in the water tank 2 by the lateral vibration damping damper 21 that attenuates and supports the drum 3 in a substantially horizontal direction.

  Accordingly, the drum 3 is elastically supported at the front and rear three places on the support base 18 via the bearing portion 8 by the plurality of springs 19a and 19b and the vibration damping dampers 20a and 20b, and the drum 3 is damped and supported in a substantially horizontal direction. The pair of left and right lateral vibration dampers 21 are elastically supported at the rear part of the water tank 2 to suppress vibrations in the vertical and horizontal directions of the drum 3 and reduce vibration transmission to the water tank 2.

  The support base 18 provided in the water tank 2 is provided with water tank support portions 22 at the lower ends of four corners. As shown in FIG. 4, the water tank support portion 22 penetrates through the hole 23 a of the base portion 23 provided so as to cover the bottom portion of the housing 1 and directly contacts the floor surface 24. Is supported by the floor surface 24.

  The housing 1 is installed on the floor surface 24 by four housing support portions 25 provided at the corners at the bottom bottom. The water tank support part 22 penetrates the housing support part 25 and is supported by the floor surface 24, and by inserting the water tank support part 22 that supports the support base 18 into the inner surface of the housing support part 25, The positions of the water tank 2 and the housing 1 can be maintained, and the water tank 2 and the housing 1 are separated, so that vibration transmission from the water tank 2 to the housing 1 can be reduced.

  The water tank support 22 and the housing support 25 are in contact with the floor 24 via an elastic body 26 provided at the bottom. The elastic body 26 is made of a material having cushioning properties such as rubber, and reduces vibration transmission to the floor surface 24.

  The elastic body 26 has a bottom part of both the water tank support part 22 and the housing support part 25, and a vertical part 26a located between the two. The vertical portion 26a is provided so as to surround the outer peripheral portion of the water tank support portion 22 that supports the support base 18, and is in contact with the housing support portion 25 or the base portion 23 through the vertical portion 26a.

  The water tank support portion 22 is provided at the same position as the case support portion 25 by penetrating the case support portion 25, but a hole 23 a is formed in the base portion 23 at a position away from the case support portion 25. It is possible to provide the water tank support 22 through the hole 23a and directly contact the floor 24. In this case, the elastic body 26 having a cushioning property such as rubber is provided in both the water tank support portion 22 and the housing support portion 25.

  The motor 10 is attached to one of the support arms 17, and a weight 27 having the same weight as the motor 10 is attached to the other support arm 17. The distance between the motor 10 and the weight 27 from the rotary shaft 7 is substantially the same, and the position of the center of gravity is stabilized.

  Washing water introduced from the outside of the housing 1 into the water tank 2 through a water supply channel (not shown) is also supplied into the drum 3 through the through holes 5. Further, the rotational drive of the motor 10 is transmitted to the rotary shaft 7 via the belt 11 and the pulley 9 to rotate the drum 3 forward and backward. The control means 28 controls the motor 10 and the like, and controls each process such as washing, rinsing and dehydration.

  About the drum type washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. At the time of washing, first, when the lid 13 is opened and the laundry and detergent are put into the drum 3 and the operation is started, the washing water is supplied into the aquarium 2 after the amount of the thrown laundry is detected. The washing water starts to accumulate from the water reservoir 29 provided at the lower part of the water tank 2. When the washing water is supplied to a predetermined water level set in advance according to the amount of the thrown-in laundry, the water supply is stopped.

The control means 28 executes the selected operation course, rotates the drum 3 forward / reversely at a predetermined rotational speed by the motor 10, and lifts the laundry in the drum 3 in the rotational direction by the baffle 4 to drop it. Perform for a predetermined time. When the temperature of the washing water detected by the temperature detection means (not shown) is low, the washing effect can be enhanced by energizing the heater 30 to heat the washing water and making it warm water.

  After the washing process, an intermediate dehydration process performed after opening a drain valve provided at a drain port (not shown) and draining washing water, an intermediate dehydration process performed between a plurality of rinses, and a final process performed after the rinse process A dehydration step is performed. In general, the number of rotations of the drum 3 in the final dewatering step is set to be the highest. In these dewatering steps, the number of rotations of the motor 10 is increased and the number of rotations of the drum 3 is increased, whereby the washing water contained in the laundry is dehydrated by centrifugal force, and the washing is finished.

  In the dehydration process, vibrations and swings caused by the drum 3 rotating at high speed are a plurality of coil springs 19a and 19b and vibration damping dampers elastically supported at three positions on the support base 18 via the bearing portion 8. 20a, 20b and a pair of left and right lateral anti-vibration dampers 21 that are damped and supported in a substantially horizontal direction at the rear portion of the water tank 2 can be attenuated, and vibration transmission to the water tank 2 can be suppressed.

  Further, since the water tank 2 is supported on the floor surface by the support base 18 that elastically supports the drum 3, the casing 1 and the water tank 2 that is a vibrating body can be separated. 3 is suppressed from being transmitted to the housing 1 through the water tank 2, and the vibration of the housing 1 can be reduced.

  As described above, in the present embodiment, the water tank 2 provided in the housing 1, the drum 3 rotatably provided in the water tank 2, the motor 10 that rotationally drives the drum 3, and the rear part of the drum 3 A rotary shaft 7 provided on the water tank 2, a bearing portion 8 that rotatably supports the rotary shaft 7, and is sealed with a flexible member 16, and a support base 18 provided in the water tank 2. 3 is elastically supported by a support base 18 by means of springs 19a, 19b and vibration damping dampers 20a, 20b via a bearing portion 8, and the water tank 2 is supported by a floor surface 24 by the support base 18. The body 1 and the water tank 2 which is a vibrating body can be separated, and the vibration of the drum 3 is suppressed from being transmitted to the housing 1 through the water tank 2 during the dehydration process, and the vibration of the housing 1 is reduced. can do.

(Embodiment 2)
FIG. 5 is an enlarged cross-sectional view of a main part of a drum-type washing machine according to the second embodiment of the present invention. A feature of the present embodiment is that a gap 26 b is provided between the outer peripheral portion of the water tank support portion 22 and the inner peripheral portion of the housing support portion 25. Other configurations are the same as those of the first embodiment, the same reference numerals are given to the same configurations, and the detailed description of the first embodiment is used.

  With the above configuration, vibration transmission from the water tank 2 to the housing 1 via the water tank support 22 can be further reduced.

(Embodiment 3)
FIG. 6 is a perspective view of the rear side of the main part of the drum type washing machine in the third embodiment of the present invention. The feature of the present embodiment is that the rotation shaft 7 of the drum 3 is coaxially connected to the rotation shaft 7 of the drum 3, and the motor 10 a is fixed to the bearing portion 8. Other configurations are the same as those of the first embodiment, the same reference numerals are given to the same configurations, and the detailed description of the first embodiment is used.

  The motor 10a is constituted by a brushless DC motor, and the rotation speed can be freely changed by inverter control. The rotation drive of the motor 10a is directly transmitted to the rotation shaft 7 to rotate the drum 3. .

  With the above configuration, a space can be secured in the lower part of the water tank 2, and the resonance point of the water tank 2 can be raised by firmly supporting the water tank 2 by the support base 18, thereby reducing vibration of the water tank 2. can do.

  As described above, the drum type washing machine according to the present invention can suppress the vibration of the drum from being transmitted to the casing through the water tank, and can reduce the vibration of the casing. Useful as.

DESCRIPTION OF SYMBOLS 1 Case 2 Water tank 3 Drum 7 Rotating shaft 8 Bearing part 10 Motor 16 Flexible member 18 Support stand 19a Spring 19b Spring 20a Anti-vibration damper 20b Anti-vibration damper

Claims (5)

A housing, a water tank provided in the housing, a drum rotatably provided in the water tank, a motor for rotationally driving the drum, a rotating shaft provided at a rear portion of the drum, and the rotating shaft A bearing portion that is freely supported and is sealed with a flexible member and a rear portion of the water tank, and a support base provided in the water tank, and the drum is supported by a spring and an anti-vibration damper via the bearing portion. A drum-type washing machine which is elastically supported by a support base and supports the water tank on the floor surface by the support base. The drum-type washing machine according to claim 1, wherein a base portion is provided at a bottom portion of the housing, and the support base penetrates the base portion and is supported by a floor surface. The drum type washing machine according to claim 1 or 2, wherein a housing support portion is provided at a bottom portion of the housing, and the support base is supported by a floor surface through the housing support portion. The drum type washing machine according to any one of claims 1 to 3, wherein an elastic body is provided at a bottom portion of the support base and is supported on a floor surface through the elastic body. The drum-type washing machine according to any one of claims 1 to 4, wherein an elastic body is provided on an outer peripheral portion of the support base so as to come into contact with a base portion or a housing support portion via the elastic body.