JPS62109598A - 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 washing machine which is designed to reduce noise during use and improve vibration characteristics during spin-drying.

BACKGROUND OF THE INVENTION Most conventional washing machines have a configuration as shown in FIG.

In FIG. 4, 1 is a main body, and 2 is a support section attached to the main body 1. 3 is an outer tank, the holding part 3a of which is received by a receiving part 4a made of a spring and a damper, and is suspended from the supporting part 2 by a suspension 4.

6 is an inner tank, which doubles as a washing tank and a dehydration tank. 6 is a stirring blade provided at the center bottom of the inner tank 6, 7 is a transmission mechanism unit that transmits the rotational force to the stirring blade 6 and the inner tank 5, and inside there is a reduction gear on the washing side and a washing/spindle switching clutch. ing. Reference numeral 8 denotes a motor that provides rotational force to the transmission mechanism components. Reference numeral 9 denotes a foot at the bottom of the main body 1. 10 is a vibration sensor, main body 1
It is provided on the upper inner surface.

The operation of the washing machine configured as described above will be explained below.

For washing, put the laundry and washing water into the inner tank 6, and transfer it to the transmission mechanism section 7.
This is done by setting the switching clutch to the washing side and transmitting the rotation of the motor 8 to the stirring blade 6 via the transmission mechanism section 7.

Next, dewatering is carried out by placing the laundry in the inner tub 6, setting the switching clutch of the transmission mechanism 7 to the dehydration side, and transmitting the rotation of the motor 8 to the inner tub 5 via the transmission mechanism 7. At the time of starting this dehydration, the outer tub 3 suspended from the suspension 4 may vibrate with large amplitude in the horizontal and vertical directions due to the laundry in the inner tub 6 being skewed or the like. If this large amplitude vibration is not suppressed, the outer tank 3 will collide with the main body 1, so the vertical component of this vibration will be suppressed by the suspension 4.
It is suppressed by a damper. On the other hand, collision between the outer tank 3 and the main body 1 due to horizontal component vibrations is avoided by the gap between the main body 1 and the outer tank 3. However, in addition, the horizontal vibration state can be determined by the uneven part, the spin-drying can be stopped, and the laundry can be rebalanced.
Dehydration is performed again.

Problems to be Solved by the Invention However, with the above configuration, the sound inside the main body 1 generated by the motor 8, the outer tank 3, etc. during washing and dehydration leaks directly to the outside through the opening at the bottom of the main body 1. ,
If the noise level is high and the laundry in the inner tub 5 is loose, the outer tub 3 may cause damage to the main body 1 or the vibration sensor 1 when starting spin-drying.
0, and dehydration was not carried out smoothly.

In view of the above-mentioned drawbacks, the present invention provides a washing machine that reduces the noise level during washing and dehydration, and can perform dehydration smoothly even when the laundry is loose.

Means for Solving the Problems In order to achieve this object, the washing machine of the present invention has an extension part provided on the suspension to serve as a suspension extension part, and a bottom plate that covers the bottom of the main body and is biased on the top surface of the bottom plate. The suspension fixing part is provided with a joint part that is freely movable in the bending direction between the suspension extension part and the suspension fixing part, and a friction body is provided at the joint part.

Function: With this configuration, the sound inside the main body generated from the motor, outer tub, etc. during washing and dehydration is insulated by the bottom plate provided at the bottom of the main body, so the noise level is significantly reduced. In addition, the friction body provided at the joint between the suspension extension and the suspension fixing part dampens the large vibrations in the outer tub that occur horizontally when starting spin-drying due to the wobbling of the laundry in the inner tub. Collision with the main body, etc. is almost eliminated, and dehydration can be carried out smoothly.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a washing machine according to a first embodiment of the present invention, and FIG. 2 is a sectional view of essential parts thereof. 1 and 2, 1 is the main body, 2 is the support part, 3 is the outer tank, 6 is the inner tank as a washing and dehydrating tank, 6 is the stirring blade, 7 is the transmission mechanism part, 8 is the motor, 9 1 is a foot, 1o is a vibration sensor, which is the same as the conventional example shown in FIG. 4. 1 and 11 are suspensions made of rigid material provided at the four corners of the main body 1,
The outer tank 3 is suspended with vibration isolation, and a suspension extension part 12 is provided at the lower part. Reference numeral 13 denotes an upper hook fixing part formed at the lower end of the suspension extension part 12. A lower hook 16 is formed at the upper end, and a male thread 17 is formed at the lower end. Further, the upper hook 13 and the lower hook 16 are hooked to each other, and a joint portion 18 that is freely movable in the bending direction
is formed. Reference numeral 19 denotes a ring-shaped friction body that covers the joint part 18 so as to tighten it to some extent, and is made of rubber or the like. Sarachi, 4 suspension fixing parts 15
A male thread 17 formed at the lower end is passed through the bottom plate 14, and is fixed to the bottom plate 14 by tightening it with a nut 21 via a buffer ring 20. Therefore, in the suspension 11, the elastic force of the bottom plate 14 is always acting downward in the axial direction.

The operation of the washing machine configured as described above will be explained below.

For washing, put the laundry and washing water into the inner tub 5, and transfer it to the transmission mechanism section 7.
This is done by setting the switching clutch to the washing side and transmitting the rotation of the motor 8 to the stirring blade 6 via the transmission mechanism section 7. Next, dewatering is carried out by placing the laundry in the inner tub 5, setting the switching clutch of the transmission mechanism 7 to the dewatering side, and transmitting the rotation of the motor 8 to the inner tub 5. During the above-mentioned washing and dehydration, the motor 8, the outer tank 3, etc. generate noise due to driving, but in this embodiment, the bottom plate 14 is provided at the bottom of the main body 1, and the sound generated from inside the main body 1 is The main body 1 is sound-insulated, and the noise level to the outside of the main body 1 is extremely low.

In addition, as shown in the prior art, when starting spin-drying, the outer tub 3 suspended from the suspension 11 may vibrate with large amplitude in the horizontal direction due to the bias of the laundry in the inner tub 5, etc. be. However, in this embodiment, the suspension extension part 12 with the upper hook 13 formed thereon is provided on the suspension 11, and the suspension fixing part 16 with the lower seven hooks 1e formed thereon is fixed to the bottom plate 14.
Furthermore, the upper hook 13 and the lower hook 16 are hooked together to form a joint 18, and the joint 18'il is covered with a friction body 19 made of dug-like rubber or the like.
When the upper hook 13 and the lower hook 16 move in the bending direction at 8, a friction force is generated between the friction body 19 and the joint portion 18. Therefore, when the outer tank 3 vibrates in the horizontal direction, the outer tank 3
The suspension 11 suspending the holder similarly causes horizontal vibration, and a bending phenomenon occurs at the joint 18, and a frictional force is generated at the joint 18 to suppress this phenomenon.

This frictional force acts more strongly as the horizontal vibration of the outer tank 3 increases, and it damps the horizontal vibration of the suspension 11. Therefore, even when the horizontal vibration of the outer tank 3 suspended by the suspension 11 becomes large, the external Collision between the tanks 3 can be suppressed. Therefore, dewatering can be performed smoothly, and the durability of the vibration sensor 1o that judges the vibration state of the outer tank 3 and detects when the outer tank 3 collides with the main body 1 can be reduced.

In addition, the noise level increases due to the noise leaking from the bottom of the main body 1 as mentioned above, but other than that, the basic vibration caused by the rotation of the inner tank 5 during dewatering is distorted by some factor. harmonic vibration is caused.
The generation of high-frequency sounds further increases the noise level. As a result of our investigation, we found that one of the causes of this harmonic vibration is the so-called collision phenomenon in which the upper part of the suspension 11 hits the support part 2 holding the suspension 11 at a frequency associated with rotation. I found out something. In order to suppress this phenomenon, it is necessary to prevent the suspension 11 from floating up from the upper support part 2. In this embodiment, the suspension fixing part 16 connected to the suspension 11 is attached to the bottom plate 14. Since the nut 21 is tightened to the bottom plate 14 via the buffer ring 20, a downward force acts on the suspension 11 in the axial direction due to the elastic force of the bottom plate 14.
The floating of the suspension 11 described above is suppressed, and the collision phenomenon that occurs between the support part 2 and the upper part of the suspension 11, which is a cause of harmonic vibration, is weakened, and the noise level can be further reduced. can.

A second embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a sectional view of a main part of a washing machine showing a second embodiment of the present invention. In the figure, reference numeral 22 denotes a suspension extension, which has an upper protrusion 23 formed at its lower end, and whose upper end is fixed to a suspension suspension 11 (not shown). A bottom plate 24 is attached to the bottom of the main body 1 (not shown) so as to cover the opening thereof. Reference numeral 26 denotes a suspension fixing portion, which has an upper protrusion 26 formed at its upper end, and a male thread 27 formed at its lower end. Further, the upper protrusion 23 and the upper protrusion 26 are embedded in and connected to a friction body 28 made of rubber or the like. However, it also serves as a joint part between the -qζ tension extension part 22 and the suspension fixing part 26 that is freely movable in the bending direction. Furthermore, the four suspension fixing parts 26 have male threads 27 formed at the lower ends.
f: Through the bottom plate 24 and through the buffer ring 29 to the nut 3
It is tightened and fixed to the bottom plate 24 with o. Therefore, the suspension 11 always faces the bottom plate 2 downward with respect to the axial direction.
4 elastic force is at work. The configuration not shown in FIG. 3 is the same as the configuration in FIG. 1.

By configuring as described above, the friction body 28 also serves as a joint, which facilitates manufacturing and improves mass productivity, thereby reducing costs.

Effects of the Invention As described above, the present invention provides a suspension extension by providing an extension part on the suspension, a bottom plate covering the opening at the bottom of the main body, a suspension fixing part on the top surface of the bottom plate, and a suspension extension. By providing a joint part that allows free bending direction between the suspension fixing part and the suspension fixing part, and equipping the joint part with a friction body, internal sound is insulated by the bottom plate and the noise level is significantly reduced. The large-amplitude vibrations of the outer tank that occur when starting dewatering are damped by the frictional force acting on the friction body provided at the joint between the suspension extension and the suspension fixing part.
Collision between the outer tank and the main body, etc. is significantly reduced, and dewatering can be performed smoothly.

Furthermore, since the overall length of the suspension does not change even when the weight of the laundry changes, the end face of the suspension extension always stays in the same position, ensuring stable braking performance and making it very easy to mass-produce. Therefore, an excellent washing machine can be realized.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a washing machine according to a first embodiment of the present invention, FIG. 2 is a sectional view of the same essential parts, FIG. 3 is a sectional view of a washing machine according to a second embodiment of the present invention, and FIG. The figure is a sectional view of a conventional washing machine. 1...Main body, 3...Outer tank, 5...
...Inner tank, 6.Old...Stirring X, 8...Motor,
11...Suspension, 12.22...
・Suspension extension fa, 14 t24...
- Bottom plate, 15.25...Suspension fixing part, 18...Joint part, 19.28...Friction body. Name of agent: Patent attorney Toshio Nakao, 1 person/-
-Ipponken N--zusu 1''nshi 3inq---4 lumps 1fu, Fig. 2 f2-1-Lichi Nshi, Kanbe Tai J Graduate 14-Employment tax Fig. 3 22-4 Stonton, Sora F long haze 24 --- 2-handling Fig. 4

Claims (1)

[Claims] An outer tank is suspended from the top of the main body by a suspension, an inner tank is provided inside the outer tank as a washing tank and a dehydration tank, and a stirring blade is provided inside the inner tank, and a motor drives the inner tank and the stirring blade. is provided inside the main body, and furthermore, an extension part is provided on the suspension to form the suspension extension part, a bottom plate is provided at the bottom of the main body by covering the opening, a suspension fixing part is provided on the top surface of this bottom plate, and the suspension extension part is provided. A washing machine that is equipped with a friction body at a joint part that is freely movable in a bending direction between a fixed part of a suspension, and a fixed part of a suspension.