JPS63135197A - Braking apparatus of 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 method for rotating and braking a washing and dewatering tank in a fully automatic (single tank type) washing machine.

[Conventional technology]

Such single-tank washing machines use one motor to perform both washing and dewatering operations. For example, in the case of an agitation type washing machine, the agitator is slowly swung during the washing operation, and the dewatering tank is rotated at high speed during the dewatering operation. Therefore, a deceleration transmission mechanism is connected to the motor, and a planetary gear is usually used for this deceleration transmission mechanism.

First, to explain the overall structure of the washing machine in Figure 4, (1) in the figure is an agitator installed in the center of the dehydration tank (2), and (3) is an agitator installed outside the dehydration tank (2). Water tank, (4) is the motor, this is the pulley (5), V
It is further connected to a deceleration rotation transmission section (8) via a deceleration transmission mechanism of a belt (6) and a pulley (7).

This rotation transmission part (8) has an inner drive shaft (15) to which the pulley (7) is attached, a connection between these and a female drive shaft (
16) is connected to a dehydration tank (2).

A planetary gear device (9) is used as a second reduction mechanism in the middle of the drive shaft (15), and a gear case of the planetary gear device (9) is interposed in the drive shaft (16).

As a braking device for the dehydration tank (2) of this type of single-tank washing machine, the gear case of the planetary gear system (9) is used as the brake wheel (13), and a brake band (
10) is fitted, and one end of the brake band (10) is bent outward to form a claw (10a). Then, the brake lever (1
2) was installed horizontally, and this brake lever (12) was supported by a lever shaft (17).

Further, the lever shaft (17) of the brake lever (12)
Thalassochile lever (18) closer to the base than the part that touches the
is fixed, and the tip thereof extends obliquely downward, and a ratchet (19) is provided at the tip. This ratchet (19) meshes with a plurality of teeth provided on a clutch cover surrounding the outer periphery of the spring clutch mechanism (14) of the drive shaft (16).

In this configuration, when washing, the brake lever (12) is pulled by a solenoid valve (not shown) and approaches the brake band (10), and its tip touches and engages the pawl (10a) of the brake band (10). Since the brake wheel (13) is stopped, rotation of the brake wheel (13) is prevented, and the dehydration tank (2) does not rotate. At the same time, the ratchet (19) at the tip of the tarlatch lever (18) also
4) to loosen the internal clutch spring and reduce frictional resistance, the forward and reverse rotation of the pulley (7) is transmitted only to the inner rotating drive shaft (15), and the agitator (1
) swings at low speed.

On the other hand, during dehydration, the brake lever (12) is moved away from the brake band (10) by a solenoid valve (not shown) to release the pawl (10a) of the brake band (10), so that the brake wheel 4 (13) %, can be rotated. At the same time, the clutch lever k (18) 1 increases the frictional resistance, transmits the rotation of the pulley (7) to the outer rotary drive shaft (16), and connects the agitator (1) and dewatering tank (2). unite and rotate at high speed in only one direction.

[Problem that the invention seeks to solve]

In such conventional braking devices, the rotation of the dehydration shaft is forcibly braked by the brake lever when dehydration is completed, so the brake lever receives a stronger impact force than the brake wheel, which causes damage between the brake lever and the lever shaft. There was an inconvenience in that the dehydration tank stopped rotating, making a loud banging noise.

In order to eliminate this inconvenience, it is conceivable to interpose a cushioning material between the brake wheel and the brake arm to absorb the impact sound during braking, but this method, for example, uses a conventional pulsator to absorb the impact sound in one direction. Relatively effective braking force can be obtained for shafts that only rotate, and for machines such as agitator-type washing machines where the agitator rotates forward and backward, the rotating shaft of the dehydration tank also rotates forward and backward. However, it is not possible to obtain sufficient braking force, especially in the reverse direction. As a result, it is incomplete to completely stop the dehydration tank and swing only the agitator.

The purpose of the present invention is to eliminate the disadvantages of the conventional example, and eliminate the impact that the lever shaft receives from the brake lever at the end of dehydration.
It is possible to prevent collision noise from occurring, and even if the agitator shaft and dehydration tank shaft try to rotate forward or backward when moving from the dewatering process to the washing process, sufficient braking force can be obtained from the brake wheel to completely stop the dehydration tank. An object of the present invention is to provide a method of braking a washing machine that can be used in a washing machine.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides a braking device that combines a brake wheel of a single-tank washing machine and a brake arm that presses against the brake wheel through a cushioning material having a large frictional resistance. The gist of the present invention is to disengage the lock lever from the recess when the brake arm is disengaged, and to engage it at the start of cleaning.

[Effect]

According to the present invention, during dehydration, the brake arm and lock lever are separated from the brake wheel by the cam, the brake is released, and the dehydration tank freely rotates at high speed. When the brake is operated at the end of dehydration, the cam rotates and the brake arm is pressed against the brake wheel by the spring force, applying the brake and stopping the rotation of the dehydration tank. At this time, since only the cushioning material comes into contact with the brake wheel, the rotation of the brake wheel can be stopped without making a loud noise. Thereafter, when the washing process begins and the shaft begins to swing, the lock lever comes down and engages with the outer circumferential recess of the brake wheel. As a result, braking is applied to the brake wheel, and only the agitator swings while the dewatering tank remains stopped. Furthermore, when the lock lever is lowered, it is done on the swinging brake wheel and at its initial stage, so unlike when stopping something rotating at high speed, it does not cause a large impact.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

Figure 1 shows one of the devices used in the washing machine braking method of the present invention.
This is a plan view of the main parts of the embodiment, in which (9) is a planetary gear device, (13) is a brake wheel that utilizes the gear case, (15) is an inner rotary drive shaft that swings the agitator, and (16) is a plan view of the main parts of the embodiment. ) indicates an outer rotary drive shaft that rotates the dehydration tank, and the overall structure in which the planetary gear device (9) is incorporated is almost the same as that in FIG. 4, so a description thereof will be omitted.

One end of the brake wheel (13) is attached to a bottle (20).
), the short side of the arm (21) is curved along the wheel (13), and the long side of the arm (21) is curved along the wheel (13). A curved surface (21a) having the same curvature as the circumferential surface of (13) was formed, and a cork material (22), for example, was pasted thereon as a cushioning material with high frictional resistance.

On the other hand, one longitudinal end of this brake arm (21) is engaged with a cam (24) rotated by a torque motor (23), and a bottle (25) is erected in the vicinity of the cam (24). ) to the wheel (13) side.

In the figure, (27) is a rotating shaft having a horizontal projecting piece (27a) integrally molded with the bottle (25) at its tip, and a claw piece (28a) at its tip on the upper part of the rotating shaft (27). A lock lever (28) with a rotary shaft (
27) Push the protrusion (27b) from the side into the lock lever (28)
It was inserted into a rectangular elongated tube (28b) formed in . A coil spring (29) is disposed within this elongated body (28b) to urge the protrusion (27b) in the direction of expansion.

Note that the torsion spring (26) is wound around the outer periphery of the rotating shaft (27).

In general, one side hole of the lock lever (28) is connected to a coil spring (29) so that this lever (28) can be attached to the wheel (
13), and the other vertical hole is positioned perpendicular to that direction (28c).
form.

A synthetic resin ring (30) having a continuous uneven surface is fitted onto the upper outer periphery of the brake wheel (13) to form a recess (
30a) are arranged in parallel at a predetermined interval, and a sliding spring (31) is wound and attached to a groove formed in this synthetic resin ring.
8) into the L-shaped through hole (28c).

Next, the method of the present invention performed using the above-mentioned apparatus will be explained. During the dewatering process, the cam (24)
The part that protrudes most from its axis is the brake arm (2
1), the brake arm (21) is moved away from the brake wheel (13) against the torsion spring (26), and the cork material (22) is separated from the brake wheel (13).

In this state, the brake wheel (13) or planetary gear set (9) rotates freely and the rotary drive shaft (15)
(16) both rotate in one direction, and the dehydration tank rotates at high speed.

In this case, the rotating shaft (
27) is also fixed at the position shown, and the protrusion (27b)
hits the end of the long (28b) and the lock lever (28)
It also remains in the induced state. When the brake is operated after the completion of dewatering or by opening the lid on the tank, the motor (2
3) causes the portion of the cam (24) closest to the rotational axis to come into contact with the brake arm (21). As a result, as shown in Fig. 2, the arm (21) is pulled toward the brake wheel (13) by the force of the torsion spring (26), and the cork material (22) is pressed against the outer periphery of the wheel (13), causing friction. The rotation of the wheel (13) is silently stopped by force, and the rotation of the dehydration tank is stopped.

This completes the dewatering process, but when the brake starts to operate and the brake arm (21) moves slightly counterclockwise as shown in the diagram,
The rotation shaft (27) also rotates counterclockwise by this amount via the pin (25), and the protrusion (27b) moves within the elongate (28b) to compress the coil spring (29). The compressed coil spring (29) tries to move the lock lever (28), but the sliding spring (31) does not move the lock lever (28).
It engages with the vertical hole of the through hole ((28c) and prevents its movement.

Next, in the washing process, when the agitator (1) attempts to swing due to the forward and reverse rotation of the motor (4) shown in Fig. 4, the brake wheel (13) of the planetary gear set (9) also rotates somewhat in the forward and reverse directions. 7 As a result, the sliding spring (31) is also attached to the brake wheel (1).
3), it moves back and forth along with the L-shaped hole at the tip (
28c), and the lock lever (28) is unlocked. And a compressed coil spring (29
) The lock lever (28) falls down due to the elasticity of the lock lever (28), and the pawl (28a) at the tip of the lock lever (28a) fits into the recess (
30a) and this brake wheel (13).
is locked. This locking is performed on the brake wheel (13) which swings slowly, and since both the recess (30a) and the lock lever (28) are made of synthetic resin, it does not make a loud noise.

As a result, with the help of the action of the spring clutch mechanism (14) in FIG. 4, only the inner rotary drive shaft (15) swings, and only the agitator (1) swings while the dewatering tank remains stationary.

When the washing process is over and the dehydration process begins, the cam (24)
rotates to separate the brake arm (21) from the brake wheel (13), and at the same time, the rotary shaft (27) rotates clockwise to release the lock lever via the protrusion (27b).
((2B) ”) is also caused, returning to the state shown in FIG.

Note that the device shown in the above embodiment is just an example, and various changes may be made, such as disposing a cushioning material on the brake wheel (13) side or changing the shape of the concave portion (30a) of this wheel (13). Conceivable.

〔Effect of the invention〕

As described above, the method of braking a washing machine of the present invention prevents the brake lever from colliding with the lever shaft during braking and causing loud noise due to the sound-absorbing effect of the cushioning material. This applies braking to the brake wheel at the end of dehydration, and even if the brake wheel attempts to rotate in both forward and reverse directions when the next washing process begins, it can be reliably stopped.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the braking method of the washing machine of the present invention during dehydration, Fig. 2 is a plan view when the above dehydration is completed, Fig. 3 is a plan view when the above is washed, and Fig. 4 is fully automatic. Figure 5 is a partially cutaway front view showing the overall structure of the machine. (1) Agitator (2) Dewatering tank (3)
...Water tank (4)...Motor (5)...
Pulley (6)...■Belt (7)...Pulley (8)...Deceleration rotation transmission section (9)...Planetary gear system (10)...Brake band (10a)...Claw (
11) Brake wheel case (12) Brake lever

Claims (1)

[Claims] In a braking device that combines the brake wheel of a single-tank washing machine and a brake arm that presses against the brake wheel through a cushioning material with high frictional resistance, a recess is provided on the outer periphery of the brake wheel, and the lock lever is connected to the recess to release the brake arm. A method of braking a washing machine characterized by disengaging it at times and engaging it again at the start of washing operation.