JPH0364159B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a single-tub type dehydrating washing machine.

Conventional Structure and Problems Conventionally, most of the parts of single-tank dehydrating washing machines have been attached to the bottom of the outer tank and a bottom plate fixed to the bottom of the outer tank. Furthermore, since the outer tank is suspended from the outer box, if the balance with respect to the center of the outer tank is lost, the performance will be seriously affected. In order to improve the balance, conventionally, a tension spring or the like was used to correct the outer tank so that it was in the center of the outer box, but this had the disadvantage that a separate part such as the tension spring was required.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and aims to improve balance performance by placing the outer tank in the center of the outer box without using separate parts as in the conventional case.

Structure of the Invention In order to achieve the above object, the single-tub dehydrating washing machine of the present invention is provided with an outer tub on the outside of the inner tub for washing and dehydration, a bottom plate is fixed to the lower part of the outer tub, and the outer tub is fixed to the bottom of the outer tub. The outer box is suspended from four corners, and a rotating blade is provided at the lower end of the center of the inner tank, and electric motors for driving the inner tank and the rotating blade are each arranged on the reaction side of the outer tank from the center when viewed from above. of the two dedicated electric motors, the lighter electric motor is placed outward from the center of the outer tank, and the heavier electric motor is placed closer to the center of the outer tank than the mounting position of the lightweight electric motor, Further, the two electric motors are disposed on the bottom plate, the longitudinal direction of the bottom plate being parallel to the front surface of the outer box.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the figure, 1 is the outer box, 2 is the outer box 1
This top plate 2 covers the top of the washing machine, and control parts for the washing machine (water level switch, water supply valve, time switch, etc.) are housed inside this top plate 2. Reference numeral 3 denotes an upper lid, which is pivotally supported on the top plate 2 so as to be openable and closable.
5 is an inner tank for washing and dehydration that has small holes in the side wall.
Outside the inner tank 5, an outer tank 4 is suspended and supported via a slider 6 and a suspension rod 7 by a buffer tube 8 having a built-in anti-vibration spring (not shown). Further, the inner tank 5 is fixed to the inner tank cylindrical portion 10 via a flange 9 provided at the lower end. A hollow brake drum 11 is fixed to the lower end of this inner tank cylindrical portion 10, and a drum receiver 12 having a flange at the upper end and a spline shape at the lower end is connected to the brake drum 11 by means of the flange. It is fixed. A large pulley 13 for dewatering is attached to the lower end of the drum receiver 12, and
It is connected via a belt 14 and a small pulley 15 to an electric motor 16 dedicated to dewatering. The inner tank cylinder shaft 1
0 and the drum bearing 12 are supported by a bearing cover 17 and a bearing case 18. Bearing cover 17
The bearing case 18 is fixed to a bottom plate 19, and the bottom plate 19 is fixed to the bottom of the outer tank 4.
20 is a rotor blade located at the center lower end of the inner tank 5;
This is fixed to the rotary blade shaft 21 and the inner tank cylinder shaft 1
0, the lower end of the rotor shaft 21 is attached to a support 22 of a planetary gear reduction device provided in the brake drum 11, and a support 24 rotatably houses a planetary gear 25. is the support 22
is fixed to. 23 internal gear, which is mounted and fixed by a pin protruding from the flange of the drum receiver 12. The support body 22, the internal gear 23, the support frame 24, and the planetary gear 25 are all made of synthetic resin. A pulley shaft 26 concentrically engaged with the cylindrical portion of the drum receiver 12 has an upper end formed into a sun gear, and a lower end connected and fixed to a large laundry pulley 28 via a collar 27 with a nut 29. The large laundry pulley 28 is connected to an electric motor 32 exclusively for washing via a V-belt 30 and a small pulley 31.

The large pulley 13 for dehydration attached to the drum support 12 connected to the inner tank cylindrical shaft 10 has cylindrical ribs 13a and 13b formed on the upper and lower sides, and the upper rib 13a is connected to the lower part of the bearing case 18. The inner diameter of the cylindrical portion is larger than the outer diameter of the cylindrical portion to prevent grease, etc. dripping from the bearing from scattering onto the V-belt 14 portion. The lower end of the lower cylindrical rib 13b is located in the recess below the upper end of the recess on the upper surface of the large washing pulley 28 located below the large pulley 13 for dewatering. 33 is a brake band, one end of which is supported by the brake shaft 35;
The other end has a small hole 33a for screw attachment and a seat surface 33b, and the end is bent into an L shape. 33
c is the bent part. This brake band 33 is wound around the brake drum 11, and is wrapped around the bearing case 1.
The bent portion 33c is engaged with the square hole 18a formed in the body wall of No. 8, and the screw hole 1 is inserted with the mounting bolt 39.
It is fixed to the part 8b. Reference numeral 38 denotes an operating lever, the tip of which is supported together with the brake band 33 on the brake shaft 35. 36 is an operating lever shaft, and a flange portion 36a is formed at the upper end.
The operating lever shaft 36 is supported at both upper and lower ends through a small hole 18c formed in the upper flange of the bearing case 18 and a small hole 18d formed in the bent portion of the body wall of the bearing case 18. A spiral spring 37 and an operating lever 38 are disposed between 18c and 18d, and a cylindrical receiver 40 is disposed below them. Further, at the mounting portion of the operating lever shaft 36, the upper end of the operating lever shaft 36 contacts the lower surface of the bearing cover 17 that contacts the lower surface of the bottom plate 19, and the upper end of the flange 36
a is received by the upper flange of the bearing case 18, and has a structure that it cannot be removed when the bearing cover 17 and the bearing case 18 are attached to the bottom plate 19. Further, the helical spring 37 has one end in contact with the body of the bearing case 18 and the other end in engagement with the actuating lever 38, so that the brake liner 34, which is normally fixed to the brake band 33, is brought into contact with the brake drum 11. , operating lever 3 to generate braking force during washing and spin-drying.
8 is energized. Further, the helical spring 37 is tightly wound, and its upper end is connected to the bearing case 18.
The actuating lever 38 is brought into contact with the lower surface of the upper flange of the
The lever 38 is configured to press downward, thereby eliminating vertical wobbling of the operating lever 38. The braking force of the brake drum 11 is used to rotate the inner tub 5 in the same direction as the rotary blade 20 when stopping the rotation of the inner tub 5 during dewatering and when the rotary blade 20 is rotating during washing. This is necessary when preventing Conversely, the braking force must be released when the inner tank 5 rotates for dewatering. 44 is a solenoid which releases the braking force and opens and closes the drain valve at the same time, and the braking force is inevitably released during the draining process as well. When releasing the braking force, use solenoid 44
When energized, the plunger 44a is attracted, and the actuating piece 41 connected to the plunger 44a by a pin 45 and the actuating lever 3 are connected to the actuating piece 41.
The actuating lever 38 is rotated by an actuating metal fitting 43 which is fixed so that its relative position with respect to the brake band 8 can be freely adjusted, thereby releasing the braking force between the brake band 33 and the brake drum 11. At the same time, the drain valve 42 is also opened to allow water to flow. In general, the characteristics of the brake band system are that the sound during operation (when applying braking force) is relatively quiet due to its structure, and there is a large difference between the braking force on the rolling side and the braking force on the non-rolling side. That's true. When stopping the rotation of the inner tank during spin-drying, there is no problem as long as the direction of rotation of the inner tank during spin-drying and the winding direction of the brake band are the same.However, when washing, the rotor blades generally rotate left and right. In order to perform the reversal, the braking force on the opposite side of the winding direction of the brake band must be set to be greater than the force that causes the rotary blades to rotate the inner tub through the laundry. One way to improve the braking force on the side opposite to the winding side is to increase the surface pressure of the brake drum and brake liner during braking. As a way to increase the surface pressure, use the operating lever 3 of the helical spring 37.
8 may be increased, but the ratio of the dimension between the brake shaft 35 and the actuating lever shaft 36 and the dimension between the actuating lever shaft 36 and the actuating metal fitting 43 that abuts the actuating lever 38 is constant. In this case, the suction force of the solenoid 44 must be increased. However, if the suction force of the solenoid 44 is increased, the cost becomes expensive and the size becomes large, so this is not a good method. Furthermore, due to the limited space, it is not possible to increase the dimensions of the actuating lever shaft and the portion of the actuating lever that comes into contact with the actuating metal fitting. In order to increase the contact pressure between the brake drum and the brake liner under such conditions, the dimension between the brake shaft 35 and the actuating lever shaft 36 is reduced so that the brake drum contacts the actuating lever shaft 36 and the actuating lever 38. The ratio of the dimension between the actuating metal fitting 43 and the dimension becomes large,
This makes it possible to respond. However, if the operating stroke of the solenoid 44 is constant, the movement dimension of the brake band when releasing the braking force becomes small, and the brake drum 11 and brake liner 34 may not be completely separated due to variations in component dimensions during production. There are cases where a part of the outer circumference of the brake drum comes into contact with the brake drum. If such a situation occurs, problems such as abnormal noises caused by the brake drum and brake liner rubbing against each other during dehydration operation and performance deterioration due to heat generation of the brake liner occur.

Therefore, in order to ensure a gap between the brake liner 34 and the brake drum 11, the brake band 33
By fixing one end, the wobbling during installation is reduced, and at the same time, a small hole is provided around the body wall of the bearing case 18 corresponding to the brake band 33, and a roughly conical hole made of synthetic resin is formed in the center from the tip. A brake band abutting tool 46 having a recessed portion is attached to the small hole from the outside. The tip of the brake band abutting tool 46 is close to the brake band 33, and even a small amount of movement of the brake band 33 when the braking force is released causes the brake band 33 to come into contact with the brake band abutting tool 46, and the brake band abutting tool 46 Due to the concave portion at the center of the brake liner, the tip size thereof changes appropriately, and the gap between the brake liner 34 and the brake drum 11 can be maintained evenly.

Most of the components of the one-tub type dehydrating washing machine of the embodiment described above are attached to the bottom of the outer tub 4 and the bottom plate 19 fixed to the bottom of the outer tub 4. Also, bottom plate 1
The longitudinal direction of the housing 9 is configured to be parallel to the front surface 1a of the outer box 1. Experimentally, if the bottom plate 19 is attached in this direction, the vibration of the tank when the outer tank 4 passes the first resonance point at the start of dehydration is minimized. Also outer tank 4
is suspended from the four corners of the outer box 1, so if it is not balanced horizontally with respect to the center of the outer box 4, the gap between the outer tank 4 and the outer box 1 will be uniform on the inside of the four sides. Otherwise, there is a problem that the outer tank 4 hits the outer box 1 at the time of starting the dehydration or during the dehydration operation. As a countermeasure against this, a dewatering electric motor 16 and a washing electric motor 3 are installed on the lower side of the bottom plate 19.
2 are installed on opposite sides of the center of the outer tub 4 when viewed from above, and the heavy laundry electric motors 3
2 and the mounting dimension from the center of the outer box 1 and outer tank 4 (A), which is lighter in weight, than the mounting dimension from the center of the outer box 1 and outer tank 4 (A). A>B was set. In order to further improve the balance, the installation dimensions from the center of the solenoid 44
(C) is also installed on the dewatering motor 16 side,
The planar center of gravity of the outer tank 4 is approximately at the center of the outer tank 4, and the balance can be improved.

Effects of the Invention As described above, according to the present invention, by optimizing the flat mounting positions of the motor for washing and the motor for dewatering, the average gap between the outer tub and the outer box becomes constant, and unlike in the past, separate parts are required. It is not necessary to attach the outer tank to expose the center of the outer tank, and it is possible to secure the specified performance while reducing the number of parts. Furthermore, two dedicated electric motors are installed opposite to the center of the outer tank on the bottom plate attached to the bottom of the outer tank.
The horizontal tensile load applied through the pulleys on the washing shaft and dehydration shaft can be offset, improving the durability of the bearing and preventing abnormal vibrations caused by the tilting of the inner tank due to unbalanced dynamic loads in the inner tank during dewatering operation. It can be prevented.

[Brief explanation of drawings]

The drawings show an example of the implementation of the present invention.
The figure is a longitudinal cross-sectional view of the washing machine, Figure 2 is an enlarged cross-sectional view of the drive section, Figure 3 is a back view, Figure 4 is a cross-sectional view of the bearing case, and Figure 5 is a cross-sectional view of the brake band supporter. , FIG. 6 is an exploded perspective view of the other end attachment portion of the brake band. 1...outer box, 4...outer tank, 5...inner tank, 16...
...Electric motor exclusively for dewatering, 20...Rotary blade, 32...Electric motor exclusively for washing.

Claims (1)

[Claims] 1. An outer tank is provided outside the inner tank for washing and dewatering, a bottom plate is fixed to the lower part of this outer tank, and the outer tank is attached to the outer box.
The inner tank is suspended from a corner, and a rotary blade is provided at the lower end of the center of the inner tank, and electric motors for driving the inner tank and the rotor blade are respectively disposed on opposite sides from the center of the outer tank when viewed from a plane. Of the two dedicated electric motors, the lightweight electric motor is placed outward with respect to the center of the outer tank, and the heavier electric motor is placed closer to the center of the outer tank than the installation position of the lightweight electric motor, and the longitudinal direction of the bottom plate is A one-tub type dehydrating washing machine, wherein the direction is parallel to the front surface of the outer box, and the two electric motors are disposed on the bottom plate.