JPH0489096A - Drum type washing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a drum in which clothes are washed and rinsed by rolling them through the rotation of the drum, and dehydrated by the centrifugal force generated by the high speed rotation of the drum. This relates to type washing machines.

2. Description of the Related Art A conventional drum-type washing machine has a structure as shown in FIG. That is, there is a main body 1 and a damper 2 inside this main body 1.
It has a water tank 3 supported by a drum 6, and a drum 6 having an open front face, a rotating shaft 4 on the rear face, and a water passage hole 5 on the side face.
The rotating shaft 4 is supported by a bearing 7 provided on the rear surface of the water tank 3. Further, a pulley 10 interlocked with a washing motor 8 and a washing machine 9 is attached to the end of the rotating shaft 4. 11 is a weight body fixed to the water tank 3. The front surface of the aquarium 3 is provided with a bellows 12 between it and the main body 1, which maintains water honey properties, and is fitted with a tapered lid 13.

Problems to be Solved by the Invention In this configuration, when dehydration is to be performed after washing and rinsing, the drum 6 is rotated at high speed with the clothes being biased towards the lower part of the drum 6.

At this time, the drum 6 vibrates greatly due to the eccentric load caused by the clothing. The amplitude of the water tank 3 caused by this vibration is greatest when the drum 6 starts rotating at a low speed, and when the drum 6 starts rotating at a high speed and the rotational speed becomes stable, the amplitude tends to decrease and become stable. Therefore, the damper force of the damper 2 is always constant, and the damper force is designed to be large in order to suppress the large amplitude of the water tank 3 during low speed rotation. Here, the vibration energy consumed by the damper 2 is approximately the product of the load applied to the damper 2 and the stroke, so when high-speed rotation is started, if the damper force is large, the stroke becomes small, and the load applied to the main body 1 or get bigger. For this reason, the water tank 3
The vibrations are not completely consumed by the hard damper 2 and are transmitted to the floor 15 via the feet 14 provided on the bottom surface of the main body 1.

At this time, in the case of a weak floor such as a wooden floor, there is a problem in that the floor vibrates greatly, leading to increased noise and resonance in the house.

The present invention solves these conventional problems,
A first object of the present invention is to provide a drum-type washing machine equipped with a friction damper whose damper force can be varied.

A second object is to provide a drum type washing machine with a damper containing a viscous fluid.

A third object is to provide a drum-type washing machine equipped with a damper having at least one pair of friction bodies.

Means for Solving the Problems In order to achieve the above-mentioned first object, the drum type washing machine of the present invention includes a main body, a water tank supported by a suspension within the main body, and a water tank that rotates around a horizontal axis of rotation. The damper includes a rotating drum, a washing motor that rotationally drives the drum, and a damper provided between the water tank and the main body. This device has a heating device that changes the frictional force between the piston and the cylinder by thermal softening caused by the piston and the cylinder.

Further, in order to achieve the above second object, the drum type washing machine of the present invention includes a main body, a water tank supported by a suspension within the main body, a drum that rotates within the water tank around a horizontal rotation axis, A washing motor that rotates the drum;
A damper is provided between the water tank and the main body, and the damper includes a cylinder filled with a viscous fluid, a piston that slides on the cylinder, and a heating device that changes the viscosity of the viscous fluid by heating. It is something that you have.

Furthermore, in order to achieve the third object, the drum-type washing machine of the present invention includes a main body, a water tank supported by a suspension within the main body, a drum that rotates within the water tank around a horizontal rotation axis, and a drum that rotates within the water tank around a horizontal rotation axis. The damper includes a washing motor that rotates the drum, and a damper installed between the water tank and the main body. It has a drive device that changes the frictional force by making contact arbitrarily.

In a working drum type washing machine, during the spin-drying process, the drum vibrates due to the eccentric load caused by the clothes, and the amplitude of the water tank due to this vibration is greatest at low speed when the drum starts rotating, and when the drum starts rotating at high speed. When the rotational speed becomes stable, the amplitude tends to decrease and become stable. In the present invention, the friction type damper uses a heat-softening member, and since the coefficient of friction is large at room temperature, that is, the temperature at the start of rotation, a large damping force is obtained, and the damper is used to suppress the large vibrations that occur at this time. Ru. When the damper is heated to a predetermined temperature by a heating device during high-speed rotation, the thermoplastic member is softened and the frictional force is reduced. This also reduces the damper force. That is, by appropriately reducing the damper force during high-speed rotation, the vibration energy of the water tank can be sufficiently damped.

Furthermore, in the present invention, which includes a damper containing a viscous fluid, the viscosity of the fluid can be reduced by using it at room temperature to suppress large amplitudes at the start of rotation, and by heating it with a heating device when high-speed rotation begins. This sufficiently damps the vibration energy of the water tank.

Further, in the present invention, which is equipped with a damper having at least one pair of friction bodies, vibration of the aquarium can be sufficiently suppressed by bringing the friction bodies into strong contact with each other by the drive device during low-speed rotation, and loosening the contact and reducing the damper force when high-speed rotation starts. It attenuates energy.

EXAMPLES Hereinafter, examples of the present invention will be described based on the drawings. FIG. 1 shows a first embodiment of the drum-type washing machine of the present invention, with 20
is a water tank that is semi-restrictedly suspended from a main body 21 by a plurality of suspensions 22, is supported internally by a horizontal rotating shaft 23, and has water holes 24 and openings 25 as appropriate.
It has a drum 26 provided with. Furthermore, 27 is a damper having one end fixed to the bottom of the water tank 20 and the other end fixed to the main body 21. 28 is a heating device including a linear heater attached to the damper 27, 29 is a temperature detection section, and 30 is a temperature control section. A bearing 31 provided in the water tank 20 is connected to one end of the rotating shaft 23.
Tram pulley 32 is attached. Reference numeral 33 denotes a heddle that is passed between the drum pulley 32 and the motor pulley 36 attached to the shaft 35 of the washing motor 34. 42 is a drainage pump attached to the bottom of the water tank 20. 43 is an inner lid provided on the drum 26;
It is connected to an outer lid 45 via a clothing inlet 44. 46
is a heros with one end fixed to the water tank 20 and the other end fixed to the main body 21. 47 is a water supply valve, which communicates with the inside of the water tank 20 via a water supply hose 48.

FIG. 2 shows the structure of the damper 27 described above, which is composed of a piston 50, a cylinder 51, the heating device 28 described above, and a temperature detection section 29.

At least one of the piston 50 and the cylinder 51 is made of a heat-softening material such as resin. In this embodiment, the piston 50 is made of a single piece of heat-softening material, which is heated by the heating device 28 to heat-soften the material so that the frictional force between the piston 50 and the cylinder 51 can be varied.

The operation in the above configuration will be explained. The clothes in the drum 26 are washed through the washing water stored in the water tank 20 in advance in the drum 2.
It is rolled and washed by the rotation of step 6. Furthermore, rinsing is performed in the same manner. After the washing and rinsing processes are completed and before the dehydration process begins, the clothes in the drum 26 are biased towards the bottom of the drum 26. For this reason, the drum 26 vibrates due to the eccentric load caused by the clothing, and the amplitude of the water tank 20 due to this vibration is
The amplitude is greatest at low speed rotation when the drum 26 starts rotating, and when the rotation speed reaches high speed and stabilizes, the amplitude tends to decrease and become stable. Therefore, in order to change the frictional force of the damper 27, the damper 27, which has a large damping force at room temperature at the start of rotation, is heated to a certain temperature by the heating device 28, the piston 50 is softened, and the frictional force is adjusted to a predetermined value. Reduce the value to . When rotating at high speed in this state,
The drum 26 vibrates due to the eccentric load caused by clothing;
Since the damper force is small, the vibration energy of the water tank 20 is sufficiently damped by the long stroke of the damper, and is not transmitted to the floor 53 via the feet 52 provided on the bottom surface of the main body 21.

FIG. 3 shows a second embodiment, which differs from the first embodiment in the damper configuration. 60 is cylinder 6
It is a piston that slides inside the piston 1, and is provided with a plurality of communication holes 62. 63 is oil filled in the cylinder 61. 64 is a heating device that heats the cylinder 61, and 65 is a temperature detection section.

Washing, rinsing, and dehydration in this embodiment are the same as in the first embodiment, but the damper is at room temperature and the oil 63 has a predetermined viscosity when the dehydration starts. Therefore, when the piston 60 moves within the cylinder 61, the oil 63 is gradually pushed out from the flow hole 62. A predetermined damper force is obtained by the resistance force generated at this time. Taking advantage of the fact that the resistance force of the oil 63 when passing through the circulation hole 62 is proportional to its viscosity, when the oil 63 starts to rotate at high speed, it is heated to a certain temperature by the heating device 64, thereby reducing the viscosity of the oil 63 and increasing the damper force. Reduce to a predetermined value. As a result, since the damper force is small, the vibration energy of the water tank during dewatering is sufficiently damped by the long stroke of the damper and is not transmitted to the floor.

Furthermore, FIG. 4 shows a third embodiment, which is similar to the first embodiment except for the damper configuration. The damper configuration will be explained. 70 is a plate-shaped first friction body;
It is attached to the outside bottom of the. Reference numerals 71 and 72 designate second and third friction bodies that are provided on the support base 73 on the main body 21 with the friction body 70 sandwiched therebetween. 74.75 is the second and third friction body 7
1.72 is a spring biased toward the first friction body 70. 76.77 is the second and third friction body 71.7 when energized.
2 in the opposite direction to the first friction body 70. This solenoid 76.77 and spring 74.75
This constitutes a drive device for the friction bodies 71 and 72.

Washing, rinsing, and spin-drying in this embodiment are the same as in the first embodiment, but the damper brings the friction bodies 71, 72 into contact with the friction body 70 by the springs 74, 75 of the drive device when the rotation of spin-drying starts. to obtain a constant frictional force and suppress large vibrations. When the high speed rotation starts, the solenoid 76.
77 is energized to pull the friction bodies 71 and 72, loosening the contact and reducing the frictional force, thereby reducing the damper force. As a result, since the damper force is small, the vibration energy of the water tank 20 is sufficiently damped by the long stroke of the damper, and is not transmitted to the floor.

Effects of the Invention As described above, the drum-type washing machine of the present invention uses a simple damper structure to suppress a large amplitude at the start of spin-drying rotation, moderately reduces the damper force when high-speed rotation starts, and has a long damper. The stroke can sufficiently attenuate the vibration energy of the water tank and prevent the vibrations from being transmitted to the floor surface.

In addition, the drum-type washing machine of the present invention uses a damper that uses a fluid whose viscous force changes depending on the temperature, to suppress large amplitudes at the start of spin rotation, and to reduce the damper force when high-speed rotation starts (so that vibrations are transmitted to the floor surface). It can be prevented from being transmitted.

Furthermore, in the drum-type washing machine of the present invention, a friction body is brought into strong contact between the water tank and the main body at the start of spin rotation to generate a large friction force, which acts as a damper force and loosens the contact when high-speed rotation starts. The damper force is reduced to prevent vibrations from being transmitted to the floor.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing a first embodiment of a drum-type washing machine of the present invention, FIG. 2 is a longitudinal cross-sectional view showing the damper configuration, and FIG. 3 is a longitudinal cross-sectional view showing a second embodiment of the present invention. FIG. 4 is a longitudinal sectional view of a damper structure showing a third embodiment of the present invention, and FIG. 5 is a longitudinal sectional view of a drum type washing machine showing a conventional example. 20...Aquarium, 21...Main body, 26...Drum,
27... Damper, 28... Heating device. Name of agent Patent attorney Shigetaka Awano Haka 1 person Aquarium 2g-1'Labe 27---Danova rs---7It]a Id tq---siiA Keichi Ue 50---Ichigo 2 Stono co--- Shi”-stone Ct---Shirishida65-

Claims (3)

[Claims] (1) A main body, a water tank supported by a suspension within the main body, a drum that rotates within the water tank around a horizontal rotation axis, a washing motor that rotationally drives the drum, and a washing motor installed between the water tank and the main body. A drum-type washing machine comprising a piston and a cylinder, at least one of which is made of a heat-softening material, and a heating device that changes the frictional force between the piston and the cylinder by heat-softening the damper. . (2) A main body, a water tank supported by a suspension within the main body, a drum that rotates within the water tank around a horizontal rotation axis, a washing motor that rotationally drives the drum, and a washing motor provided between the water tank and the main body. A drum-type washing machine comprising: a cylinder filled with a viscous fluid; a piston that slides on the cylinder; and a heating device that changes the viscosity of the viscous fluid by heating. (3) A main body, a water tank supported by a suspension within the main body, a drum that rotates within the water tank around a horizontal rotation axis, a washing motor that rotationally drives the drum, and a washing motor provided between the water tank and the main body. A drum-type washing machine comprising at least a pair of friction bodies, one of which is attached to a water tank and the other of which is attached to a main body, and a drive device that changes the frictional force by arbitrarily bringing the friction bodies into contact with each other. Machine.