JPS5814944Y2 - Washing machine brake operating device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a brake operating device for a washing machine, and particularly to a part of a clutch lever used in a fully automatic washing machine.

In general, the clutch lever consists of a brake lever that stops the brake during spin-drying, and a ratchet lever that operates the clutch spring to switch between washing and spin-drying, and both are usually made of steel plate and integrated. It has a structure.

The end of the ratchet lever has a ratchet made of steel plate, which is rotatably attached with a torsion spring, etc., and the clutch spring is activated by the engagement and disengagement of the plastic coil collar and the pawl of the steel plate ratchet. The main thing is what you manipulate.

In addition, the brake lever is manufactured in a complex shape, such as a mouth or U-shape, and has a protruding piece at the tip that engages with the hook of the brake band and is approximately the same width as the hook to stop the brake. Most of them are.

Therefore, due to the complicated shape, dimensional accuracy cannot be achieved, and the brake lever and ratchet lever must be adjusted for each machine.In particular, the meshing distance between the ratchet and coil collar claws is bad whether it is large or small, and washing The dewatering operation became abnormal and produced strange noises, making the work difficult as it required a high degree of skill and productivity not improving.

In view of the above-mentioned drawbacks, the purpose of the present invention is to prevent the occurrence of abnormal noise, make it easier to achieve dimensional accuracy of each part that makes up a part of the clutch lever, and simplify the structure, thereby increasing productivity. An object of the present invention is to provide a brake operating device for a washing machine that can be improved.

The gist of the present invention is to include a synthetic resin ratchet lever, a synthetic resin ratchet lever that has an approximately U-shaped elastic deformation part that engages with a coil collar, and a part of a stopper, and a synthetic resin ratchet lever that engages a coil collar and has a stopper part. The mating synthetic resin rotary bearing portion is integrally formed, and the insertion angle of the coil collar and ratchet is arranged so as to extend in the direction of rotation from the center line of each rotation.

Hereinafter, specific embodiments of the present invention will be described based on the drawings.

Reference numeral 1 denotes an outer frame of the main body, and an outer tank 3 buffered by a hanging rod 2 is suspended inside the outer frame.

Furthermore, a washing tub 4 and a pulsator 5 are installed inside the washing tub 4 and a pulsator 5, and a clutch section 6 and a bell I/7 for switching between washing operation and spin-drying operation and stopping the brake are connected to the washing tub 4 and pulsator 5 at the bottom. A motor 8 that rotates the motor 5 and the like are attached.

On the other hand, a top cover 9 is fixed to the upper part of the outer frame 1,
Panel part 10 and lid 11 which have various electrical parts built into it
is installed.

Further, a drain port 12 is provided at the bottom of the outer tank 3, and the water in the outer tank 3 is drained to the outside via a drain hose 13.

To explain the structure of the clutch section 6, the upper case 1
4 is a water seal 15 and an upper bearing 1 at the bottom of the outer tank 3.
A lower case 17 is further attached to the upper case 14 with a lower bearing 18 attached thereto.

A hollow shaft 19 is rotatably attached to the center of the shaft, and a brake drum 20 is attached to it inside both cases 14 and 17, and a brake band 22 is attached to the outer periphery of the drum 20 via a brake lining 21. It is being

A raised hook portion 23 is provided at one end of the brake band 22.

A pulsator shaft 24 is rotatably mounted inside the hollow shaft 19 via a bearing 25 .

The pulsator 5 is attached to the upper end of the pulsator shaft 24,
A washing tub 4 is attached to the upper end of the hollow shaft 19.

On the other hand, a pulley boss 26 fixed to the pulsator shaft 24 is attached to the lower end of the hollow shaft 19, and a stepped large diameter portion 27 is configured to have the same diameter as the lower end diameter 28 of the hollow shaft 19. A clutch spring 29 is tightly wound around both.

A coil collar 31 made of plastic and having sawtooth claws 30 is attached to the outer periphery of the clutch spring 29 .

A pulley 33 is fastened to the small diameter portion 32 of the pulley boss 26 with a nut 34 or the like.
3 is connected to the motor 8 side via a belt 7.

On the other hand, a pin 35 is arranged in a part of the lower case 17,
A clutch lever is connected to the pin 35 via a torsion spring 36.
37 is rotatably mounted.

The lever 37 is constantly pressed counterclockwise by a screw spring 36, and the brake lever 3 is used to stop the brake.
8 and laundry.

It is composed of a ratchet lever 39 for switching the dewatering operation.

The brake lever 38 is formed of a single steel plate into a flat plate shape, and when not in operation, its end hook portion 40 engages with the hook portion 23 of the brake band 22. It has a stopper part 41 that abuts on the other end, and a lever arm part 42 is provided at the other end.

A plastic ratchet lever 39 is integrally provided with the brake lever 38, and its rotation bearing portion 43
The brake lever 38 made of a steel plate is sandwiched between the brake levers 38 and plastic is integrally formed from the top and bottom of the brake levers 38.

The ratchet lever 39 is bent into a dogleg shape in the middle, and a triangular protrusion-shaped ratchet 44 is integrally formed at the tip thereof, and is engaged with the pawl 30 of the coil collar 31 when not in operation.

Further, the ratchet 44 is integrally provided with a U-shaped elastic deformation portion 45 and a stopper portion 46.

A magnet base 47 is fixed to the upper case 14,
It includes a drain valve 48 that communicates with the drain port 12 of the outer tank 3.
and a drain magnet 49 are tightened via a valve lever 50.

The valve lever 50 has a rising portion 51 in the middle thereof so as to be hooked onto the arm portion 42 of the brake lever 38.

In the above configuration, first, during washing, when the pulsator 5 rotates in the direction of the arrow in FIG. 3 (clockwise rotation when viewed from above), the rotation of the motor 8 is transmitted to the pulley 33 via the belt 7,
Then, the pulley boss 26 is rotated, the pulsator shaft 24 rotates, and the pulsator 5 rotates to perform washing.

At this time, the clutch spring 29 acts in the winding direction (if the clutch spring 29 is clockwise), but the pawl 30 of the coil collar 31 and the ratchet 44 of the ratchet lever 39 engage, and the coil collar 31 rotates in the direction of the arrow. Even if an attempt is made to do so, the clutch spring 29 is not wound because it gets caught on the stopper portion 46 of the ratchet 44 and cannot be rotated.

Also, during washing, if the pulsator 5 rotates in the opposite direction to the arrow in FIG. Do laundry.

At this time, since the clutch spring 29 acts in the direction of unwinding (if the clutch spring 29 is right-handed), the force is not transmitted to the hollow shaft 19 side.

Further, the ratchet 44 can be disengaged from engagement to prevent the motor from locking, and its operation can be performed smoothly by the elastic deformation portion 45.

When draining water, if the magnet 49 is energized, the magnet attracts it and the valve lever 50 is pulled, causing the drain valve 4
8 opens.

During dehydration, the magnet 49 is energized and the motor 8 is turned on at the same time.
It is good to rotate.

That is, when the magnet 49 is energized, the valve lever 50 is pulled, and its rising portion 51 causes the brake lever 38 to be pulled.
The arm portion 42 is attracted to the magnet 49 side, and the brake is released.

When the motor rotates in the direction of the arrow in Figure 3, the pulley 33
is transmitted to the pulley boss 26, and the clutch spring 29 wraps around the lower end diameter 28 of the hollow shaft 19 (right-handed winding).
9 and spins the washing tub 4 to perform dewatering.

If the clutch lever 37 is to be further stopped, the motor 8 is de-energized and the magnet 49 is also de-energized, and the clutch lever 37 is returned to its initial state by the screw spring 36.

That is, the tip hook portion 40 of the brake lever 38 engages with the hook portion 23 of the brake band 22 to stop the brake, and the ratchet 44 of the ratchet lever 39 engages with the pawl 30 of the coil collar 31.

As mentioned above, the function of the clutch lever 37 is important, and the meshing distance between the pawl 30 of the coil collar 31 and the ratchet 44 is important. Since dimensional accuracy can be achieved, the adjustment work required in the conventional method can be avoided, and by integrally providing the U-shaped elastic deformation portion 45 and the stopper part 46 on the ratchet 44, the pulsator 5 can be moved in the direction indicated by the arrow in FIG. When the hook portion 40 of the brake lever 38 is rotated in the direction shown in FIG.
The coil collar 31 is also turned in the same direction until it is caught on the
The ratchet 44 moves as shown by the dotted line in FIG. 4 by lifting up the pawl 30.

Also, when rotating in the direction of the arrow, the coil collar 31 also tries to rotate at the same time, but the ratchet 44's slug part 4
Since it is locked to 6 and does not rotate, it can be operated smoothly.

Furthermore, since the coil collar 31 and ratchet 44 are both made of plastic, there is no need for only the coil collar 3111IIJ to wear out, unlike in the past.
It can withstand long-term use and has a smooth sound.

In particular, if both are made of the same material, the effect will be further improved.

Moreover, since the brake lever 38 is formed of a flat steel plate, when the brake is stopped, the surfaces a and l (see FIG. 4) of the tip hook portion 40 touch the outer periphery of the brake band 22 and the hook portion 23. Even if it hits, the contact area is only the thickness of the plate, so it is extremely small compared to the conventional one, which not only greatly reduces impact noise, but also stabilizes the dimensions and ensures strength.

Further, since both the brake lever 38 and the ratchet lever 39 are integrally formed in the rotary bearing portion 43, rattling can be eliminated and the operation can be performed more smoothly.

Furthermore, in the engagement between the coil collar 31 and the ratchet 44, it is better to have a larger engagement distance 11 as shown in FIG. The number of gears 12 is reduced, and the coil collar 31 and ratchet 44 are
This caused an abnormal noise and malfunction.

This would not be a problem if the stroke of the magnet I-49 was made larger and it pulled a lot over the whole, but if that were done, the magnet 49 and the mounting-related height would have to be significantly changed.

Therefore, in the present invention, both the meshing allowance 11 and the gap 12 are made large while the stroke remains unchanged, and the insertion angle of the ratchet 44 is shifted to further stabilize the operation.

This is because the conventional cap 12 is shifted to the right by θ, which was on the OO' line.If it is shifted too much, it will not be able to engage, but by shifting it to the right to a certain extent, the cap 12 can be made larger. There is also a margin in the meshing allowance 11.

Therefore, in the unlikely event that the lever arm 4 of the brake lever 38
Even if the gap between 2 and the lever rising portion 51 of the valve lever 50 becomes large and the actual magnet stroke becomes small, the gap 12 can be sufficiently secured, resulting in stable operation.

In addition, since the elastic deformation portion 45 and the stopper portion 46 are integrally formed on the ratchet lever 39, the number of parts is reduced compared to a conventional ratchet mechanism using a torsion spring, making it easier to take over the ratchet mechanism. No assembly work is required.

Furthermore, since the elastically deformable portion 45 absorbs errors in the manufacturing dimensions of the coil collar 31 and ratchet 44, there is no need to make adjustments to achieve dimensional accuracy in the meshing of the coil collar 31 and ratchet 44, resulting in excellent productivity. ing.

As described above, according to the present invention, (1) By shifting the insertion angle between the ratchet 44 and the coil collar 31 in the rotation direction from their respective rotation center lines,
Since the meshing allowance 11 and the gap 12 can be maintained reliably, the operation is stable and abnormal noise can be prevented, and even if the flow of the magnet 49 becomes small, no abnormality will occur.

(2) Since the ratchet 44 having the elastic deformation portion 45 and the collar portion 46 and the rotary bearing portion 43 are integrally formed on the ratchet lever 39, dimensional accuracy between these parts is maintained. Since the number of parts is reduced, productivity is improved.

(3) Errors in the manufacturing dimensions of the coil collar 31 and ratchet I/44 can be absorbed by the elastically deformable portion 45 formed integrally with the ratchet lever 39, and the meshing accuracy of the coil collar 31 and ratchet 44 is achieved. It is possible to eliminate the need for adjustment.

This effect can be achieved.

[Brief explanation of the drawing]

Fig. 1 is an external front view of a washing machine having the present invention, Fig. 2 is an enlarged sectional view of the clutch part of the invention, Fig. 3 is a bottom view of the clutch part of the invention, and Fig. 4 is a part of the clutch lever of the invention. FIG. 3...Outer tank, 4...Washing tub, 5...
...Pulsator, 6...Clutch section, 31.
...Coil color, 35 ...Pin, 37
... Part of clutch lever, 38 ... Brake lever, 39 ... Ratchet lever, 43
... Rotating bearing part, 44 ... Ratchet, 45 ... U-shaped elastic deformation part, 46 ...
・Part of the stopper.

Claims (1)

[Scope of utility model registration request] A clutch part is attached to the lower part of the outer tub containing a washing tub with a pulsator installed at the bottom, and a steel plate brake lever and a synthetic resin type ratchet lever are attached using a pin installed upright in a part of the clutch part as a fulcrum. In the ratchet lever, the ratchet lever includes a synthetic resin type ratchet having a substantially U-shaped elastic deformation part that engages with the coil collar and a part of the stopper, and a synthetic resin type ratchet that fits into the pin. A brake operating device for a washing machine, characterized in that the coil collar and the ratchet are integrally formed with each other, and the angle of insertion of the coil collar and the ratchet is aligned in the direction of rotation from their respective rotation center lines.