JPH0361466B2 - - Google Patents

Description

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

Conventional structure and its problems The disadvantage of the brake device in conventional single-tub washing machines is that the brake band is often supported on both ends of the brake band, and there is no play in the shaft support. Due to collisions, etc., the central part of the pivoted part of the brake band will drop under its own weight, and the contact surface between the brake liner attached to the inner surface of the brake band and the brake drum will not be parallel, and the brake liner will partially contact the brake liner, causing the brake to become loose. Squeaking occurs, leading to abnormal wear of the brake liner. Also, during dehydration operation, abnormal noises were sometimes generated due to rattling of the shaft portion of the brake band.

OBJECT OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and the brake liner attached to the inner surface of the brake band and the brake drum are in equal contact with each other, thereby preventing abnormal wear of the brake liner, and further improving dehydration operation. The purpose of this is to prevent abnormal noise from occurring due to rattling of the shaft portion of the brake band.

Structure of the Invention In order to achieve the above object, a brake device for a single-tub dehydrating washing machine according to the present invention includes a rotary blade at the lower center end of an inner tub for washing and dehydrating, and an outer tub on the outside of the inner tub. a bearing case and a bearing cover are provided at the bottom of the outer tank to support a rotor shaft having the rotor blade fixed to the upper end thereof and an inner tank cylinder shaft having the inner tank concentrically fixed to the upper end; In a one-tub type dehydrating washing machine, a brake drum having a brake band wound therein, one end of which is supported by a bearing case and the other end of which is supported by an operating lever, is fixed to the inner tub cylindrical shaft; is formed into a substantially L-shape, and one end of the bearing case is engaged and fixed in a square hole formed in the body wall of the bearing case.

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 shaft 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 shaft 10, and has a flange at the upper end and a spline shape at the lower end. A drum receiver 12 is fixed to the brake drum 11 using the flange. A large pulley 13 for dewatering is attached to the lower end of the drum receiver 12, and is connected via a V-belt 14 and a small pulley 15 to an electric motor 16 exclusively for dewatering. The inner tank cylinder shaft 10 and the drum bearing 12 are supported by a bearing cover 17 and a bearing case 18. The bearing cover 17 and the bearing case 18 are fixed to a bottom plate 19, and the bottom plate 19 is fixed to the bottom of the outer tank 4. Reference numeral 20 denotes a rotor blade located at the lower end of the center of the inner tank 5, which is fixed to the rotor shaft 21 and arranged concentrically with the inner tank cylindrical shaft 10, and the lower end of the rotor shaft 21 is connected to the brake drum. The planetary gear 2 is attached to the support body 22 of the planetary gear reduction device provided in the
A support frame 24 which rotatably accommodates 5 is fixed to the support body 22. Reference numeral 23 denotes an internal gear, which is mounted and fixed by a pin protruding from the flange of the drum receiver 12. Note that the support body 22 and the internal gear 2
3. The support frame 24 and the planetary gear 25 are both 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 V-belt 14 is formed with an inner diameter larger than the outer diameter of the upper part of the cylinder to prevent grease and the like dripping from the bearing from scattering onto the V-belt 14. 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. Reference numeral 33 denotes a brake band, one end of which is wound into a hollow cylindrical shape, and the fixed part is pivotally supported by the brake shaft 35, and the other end has a flat seat surface 33b formed in dimension D, and approximately in the center for screw attachment. A small hole 33a is formed, the end of which is bent into an L-shape, and 33c is the bent portion, the width of which is E. Also seat surface 33
A bent portion 33d is formed at an obtuse angle at a position of dimension D toward the opposite side from the bent portion 33c of b.
This brake band 33 is wound around the brake drum 11, and is formed in a square hole 1 formed in the body wall of the bearing case 18 with a height dimension F and a circumferential width H dimension.
8a is engaged with the bent portion 33c. The above-mentioned dimension F is set to such a dimension that the width dimension E of the bent portion 33c is engaged and no rattling occurs. The H dimension is set to approximately twice the plate thickness dimension of the bent portion 33c. Also, the square hole portion 18 of the bearing case 18
A flat seat surface 18e with a circumferential dimension G and a width greater than the width of the brake band 33 in the height direction is formed in the vicinity of a, and a burring hole for screw attachment is formed approximately in the center of the G dimension. . The relationship between the dimension D of the seat surface 33b of the brake band 33 and the dimension G of the seat surface 18e is set to be approximately the same, so that there is no wobbling in the circumferential direction when the brake band 33 is fixed with the mounting bolts 39. . Further, the square hole portion 18a also has the bent portion 33c.
When the screws are engaged and fixed with the mounting bolts 39, rattling in the F dimension direction is also prevented. Further, at the end of the seat surface 18e of the body wall portion of the bearing case 18, the brake band 3 has a circumferential width I dimension and a height dimension.
A rectangular hole portion 18f having a width E dimension approximately twice as large as the width E of No. 3 is formed. Even after the bearing cover 17 and the bearing case 18 have been assembled, the square hole 18f can be removed by removing the brake shaft 35 and the mounting bolts 39.
If the brake band 33 is inserted into the bearing case 18 through the square hole 18f, the brake band 33 will fit into the square hole 18g formed on the operating lever 38 side of the body wall of the bearing case 18.
The brake band 33 can be taken out of the bearing case 18, and the brake band 33 can be easily replaced for service. Note that the tip of the operating lever 38 is supported together with the brake band 33 on the brake shaft 35. Reference numeral 36 denotes an actuation lever shaft, which has a flange 36a formed at its upper end. Both upper and lower ends are penetrated and supported by small holes 18d formed in the
Helical spring 37 between the small holes 18c and 18d
A cylindrical receiver 40 is disposed below the operating lever 38 and the operating lever 38. 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 which contacts the lower surface of the bottom plate 19, and the collar portion 36a at the upper end contacts the bearing case 18.
The bearing cover 17 and the bearing case 18 are received by the upper flange of the bottom plate 19 and cannot be removed when the bearing cover 17 and the bearing case 18 are attached to the bottom plate 19. Also, the helical spring 37
has one end in contact with the body of the bearing case 18, the other end engages with the actuating lever 38, and is normally in contact with the brake band 33.
A brake liner 34 fixed to the brake drum 11 is brought into contact with the brake drum 11, and an operating lever 38 is biased to generate braking force during washing and dewatering.
Further, the helical spring 37 is tightly wound, and by bringing the upper end into contact with the lower surface of the upper flange of the bearing case 18 and engaging the lower end with the operating lever 38, the operating lever 38 is moved downward. It is configured to be pressed, 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. To release the braking force, when the solenoid 44 is energized, the plunger 44a is attracted, and this plunger 4
The actuating lever 38 is rotated by an actuating piece 41 connected to the actuating piece 4a by a pin 45 and an actuating metal fitting 43 fixed to the actuating piece 41 so that its relative position with respect to the actuating lever 38 can be freely adjusted. The braking force with 11 is released. 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 noise during operation (when applying braking force) is relatively quiet due to its structure;
Also, there is a large difference between the braking force on the winding side and the braking force on the anti-winding side. When stopping the rotation of the inner tank during spin-drying, there is no problem if the direction of rotation of the inner tank during spin-drying and the winding direction of the brake band are the same, but when washing, the rotor blades must be moved in one direction. In order to perform left-right reversal, the braking force on the opposite side of the winding direction of the brake band must also 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. One way to increase the surface pressure is to increase the biasing force of the helical spring 37 against the actuation lever 38, but the size between the brake shaft 35 and the actuation lever shaft 36 and the contact between the actuation lever shaft 36 and the actuation lever 38 are important. If the ratio between the size and the operating fitting 43 is constant, 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 brake liner under these conditions,
By reducing the dimension between the brake shaft 35 and the actuating lever 36, the ratio of the dimension between the actuating lever shaft 36 and the actuating metal fitting 43 that abuts the actuating lever 38 to the above-mentioned dimension increases, and this can be accommodated. I can do it. 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 in the peripheral wall of the body of the bearing case 18 corresponding to the brake band 33, and a substantially 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 abutting tool 4 to
The brake band 33 is brought into contact with the brake band 33, and the size of its tip changes appropriately due to the recessed part at the center of the brake band abutment tool 46, so that 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, outer tank 4
is suspended from the outer box 1, so if it is not balanced in plane with respect to the center of the outer tank 4, the gap between the outer tank 4 and the outer box 1 will not be uniform on the inside of the four sides, This causes an inconvenience in that the outer tank 4 hits the outer box 1 at the start of dehydration or during dehydration operation. As a countermeasure for this, a dewatering electric motor 16 and a washing electric motor 3
2 is set so that A>B so that the mounting dimension A from the center of the lighter motor 16 for dewatering is larger than the mounting dimension B from the center for the heavy laundry motor 32. Furthermore, in order to improve the balance, the mounting dimension C from the center of the solenoid 44 is also provided on the dewatering motor 16 side, so that the planar center of gravity of the outer tank 4 is approximately at the center of the outer tank 4, and the balance is improved. I can do it.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1) By engaging and supporting one end of the brake band with the square hole of the bearing case, a secure attachment without rattling or loosening is achieved, and reliable braking force is achieved whether the brake drum is rotated in the left or right direction. It is possible to provide a highly durable brake device that can be obtained without producing any abnormal noise during braking.

(2) By securely fixing one end of the brake band without rattling, the brake liner attached to the inner surface of the brake band and the brake drum are evenly contacted, and abnormal wear of the brake liner can be prevented.

(3) By fixing one end of the brake band, the gap between the brake liner and brake drum can be stabilized even if the rotation angle of the operating lever is small when the brake is released (the gap between the brake liner and the brake drum is small). This makes it possible to prevent abnormal noise and wear caused by contact between the brake drum and brake liner during dehydration operation.

(4) Compared to the conventional method of pivoting both ends of the brake band, the number of parts to be installed can be reduced and ease of assembly can be improved.

(5) Service replacement of brake bands is easier than with conventional products.

[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, 10...
...Inner tank cylinder shaft, 11...Brake drum, 12...
Drum support, 13...Large pulley, 14...V belt, 15...Small pulley, 16...Dehydrating motor, 17...Bearing cover, 18...Bearing case,
18a...square hole part, 18b...screw hole, 19...
Bottom plate, 20...Rotor blade, 21...Rotor blade shaft, 22
... Support body, 23 ... Internal gear, 24 ... Support frame, 25 ... Planetary gear, 26 ... Pulley shaft, 2
8...Large pulley, 30...V belt, 31...
Small pulley, 32... Electric motor for washing, 33...
Brake band, 33a...small hole, 33b...seat surface,
33c...Bending portion, 34...Brake liner,
35... Brake shaft, 36... Operating lever shaft, 3
8... Operating lever, 39... Mounting bolt.

Claims (1)

[Claims] 1 A rotary blade is provided at the center lower end of an inner tank for washing and dewatering, an outer tank is provided outside the inner tank, and the inner tank is concentrically attached to the upper end of the rotor shaft with the rotor blade fixed to the upper end. A bearing case and a bearing cover are provided at the bottom of the outer tank to support a fixed inner tank cylindrical shaft, and a brake band is wound around the bearing case with one end supported by the bearing case and the other end supported by an operating lever. In a one-tank dehydrating washing machine configured such that a drum is fixed to the inner tub cylindrical shaft, one end of the brake band is formed into a substantially L shape, and one end of the brake band is formed in a square hole formed in the body wall of the bearing case. A brake device for a single-tub type dehydrating washing machine that is engaged and fixed.