JPH0433691A - Braking device of washing machine - Google Patents

Abstract

PURPOSE:To prevent the operation defect of a drainage solenoid valve and the reduction of a drainage stroke from occurring without acting a force of pinch on a connecting plate and the drainage solenoid valve by applying the reaction force of a braking lever so as to function on the operating shaft of a drainage valve and the drainage solenoid valve in a state where a brake is released. CONSTITUTION:The shape of the contact part of the braking lever is formed in curved shape extending over from an operation member point when the brake is applied to an operation member contact point when the brake is released so that the contact point of an operation member provided at the connecting plate 40 for drainage valve opening/closing and the contact part of the braking lever 34 for brake turning can always be located on the operating shaft of the drainage valve and the drainage solenoid valve. The reaction force of the braking lever 34 is comprised so that it can be operated on the operating shaft of the drainage valve and the drainage solenoid valve 41 in the state where the brake is released, and also is comprised so that a component force in an outside direction does not exist. Thereby, since a force pressing the braking lever can be always located at the operating shaft of the drainage valve and the drainage solenoid valve, no force pressing the operation member in the outside direction occurs, and no pressing of the connecting plate to the outside occurs.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a washing machine and a brake device having a dewatering and washing tub.

2. Description of the Related Art In general, a washing machine having a spin-drying/washing tub is equipped with a brake device for controlling the spin-drying/washing tub, and this brake device controls the inertial rotation of the spin-drying/washing tub at the end of the spin cycle. At the same time, the dehydration and washing tubs are prevented from running together during the washing operation.

This brake device is composed of, for example, a band brake device, and in this case, the brake band is wrapped around the brake drum so that the direction of dehydration rotation is the tightening direction. It is constructed so that the inertial rotation of the washing tub can be quickly stopped.

In such a band brake device, as shown in FIG. 6, the brake lever 34 for opening and closing the brake band 32 is positioned at right angles to the connecting plate 4o for opening and closing the drain valve.
When the drain valve 36 is opened and closed, the brake lever 34 is rotated by the pipe, and the brake band 32 is opened and closed by the rotation of the brake lever 34. The brake lever 32 is the actuator 4.
There is a fulcrum between the brake wheel 3 and the brake wheel 25, and the contact portion with the actuator 43 makes a circular motion around the fulcrum. In addition, 41 in the figure is a drainage electromagnetic valve, and 33 is a spray valve.

Problems to be Solved by the Invention In the above structure, as shown in FIG. 7, in the braking state, the brake lever 34 and the actuator 43 provided on the connecting plate 4o for opening and closing the drain valve are at right angle positions. Ashi,
As shown in Figure 8, the drain valve is open and the tab brake lever 3
When the brake is released by pulling 4, the brake lever 34 and actuator 43 touch at a point + inclined by θ with respect to the central axis in the operating direction of the drain valve, so force A acts. Actuator 43 moves outward. and connecting plate 4o
If the plunger of the drain solenoid valve is forced outward, malfunction of the drain solenoid valve or deformation of the drain valve may occur.
Furthermore, since the contact point between the actuator 43 and the brake lever 34 tends to fluctuate, the stroke of the drain valve changes, and it may not be possible to secure the stroke necessary for the drain capacity.

The present invention aims to solve these problems,
When the drain solenoid valve operates to open the drain valve and rotate the brake lever, no prying force is applied to the connecting plate and the plunger of the drain solenoid valve, resulting in malfunction of the drain solenoid valve and a decrease in the drain stroke. It is an object of the present invention to provide a brake device for a washing machine that prevents the above.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention has provided that the contact point between the actuator provided on the connecting plate for opening and closing the drain valve and the contact portion of the brake lever for rotating the brake is always connected to the drain valve and the drain solenoid valve. The shape of the contact part of the brake lever is curved from the contact point of the actuator when applying the brake to the contact point of the actuator when releasing the brake, so that the contact part of the brake lever is located on the operating axis of the brake lever. When the brake is released, the reaction force of the brake lever acts on the actuator on the operating axis of the drain valve and the drain solenoid valve, so that no outward component force acts.

Function In the above configuration, the contact point between the brake lever and the actuator moves to the outside of the brake lever, but since the force that pushes the brake lever is always on the operating axis of the drain valve and the drain solenoid valve, There is no force pushing outward,
The connecting plates are also not pushed outward.

EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings. First, in FIG. 3 showing a longitudinal side view of the entire washing machine, reference numeral 1 denotes an outer box of the washing machine, and a water receiving tank 3 is elastically suspended via an elastic suspension mechanism 2 within the outer box 1.

Inside the water receiving tank 3, a dewatering/washing tub 7 is provided, which has a rotating blade 4 at the center of the bottom, a fluid balancer 5 at the top, and a large number of dewatering holes 6 on the outer periphery. There is a reinforcing plate 8 at the bottom of the water receiving tank 3, a motor 9° mechanical unit 10 is attached, and a motor pulley 11. Impeller pulley 1
Rotation is transmitted between the two using a V-belt 13.

A part of the bottom of the water receiving tank 3 has a drain hole 14, and a drain valve 1
It is connected to 5. Then, from the drain valve 15 to the drain hose 7
16 is led out to the outside.

Also, on the top of the outer box 1 is a panel section 1 for storing Nuitch items.
7 and an upper box 19 provided with a lid 18, and an input hole 20 is provided in the upper box 19.

Figure 4 is a detailed sectional view of the mechanical unit) 10, in which a dewatering shaft 22 is provided with a shaft 21 for rotating the rotor blade 4 inside.
The impeller pulley 12 at the bottom end is the gear shaft 2
3 with a nut 24. The tip of the gear shaft 23 meshes with a planetary gear unit 26 within the brake wheel to reduce speed and transmit rotation to the shaft 21. Gear goo 72 is attached to the outer periphery of gear shaft 23.
7゜Pulley metal/l/2B is attached, the gear case 27 is fixed to the brake wheel 26, and the pulley metal 28
is fixed to the gear shaft 23. 29 is a spring that transmits rotation in only one direction between the gear case 27 and the pulley metal 28, and 30 is a bearing that maintains rotation.

Reference numeral 31 denotes a spring that prevents rotation in the opposite direction to that of the spring 29. There is a brake band 32 on the outer periphery of the brake wheel 25 to which a brake shoe 33 is attached, and one end is connected to a brake lever 34. In the following description, the same reference numerals are used for the same components as those of the conventional device shown in FIGS. 6 to 8.

FIG. 6 is a detailed view of the drain valve section. The drain valve 15 is pressed against the valve seat 36 of the cock frame 35 by a cock spring 37, and a plug 38 is attached to the tip of the drain valve 15. One end is hung on the connecting plate 4o. The other end of the connecting plate 4o is connected to a connecting rod 42 of a drain electromagnetic valve 41.

A pipe-shaped actuator 43 is attached to the connecting plate 4o with a bolt 44.
This actuator 43 is connected to the brake lever 34.
It rotates.

FIG. 1 is a plan view of the connecting plate 40, showing the drain valve in the closed state with the brake applied.

FIG. 2 shows a state in which the brake is released. The contact surface 46 of the brake lever 34 with the actuator 43 moves as shown in FIGS. 4 to 6, that is, when the brake lever 34 rotates, it moves from 46 to 47, but it does not touch at any point. The line connecting the contact point 46° 47 and the center 48 of the actuator 43 is curved so as to be parallel to the center line 49 of the operating axis of the drain valve and the drain electromagnetic valve.

FIG. 6 is a plan view showing the relationship between the brake section and the drain valve section. In the above configuration, when the brake lever 34 rotates, the line connecting all contact points of the brake lever 34 with respect to the actuator 43 and the center 48 of the pipe 43 becomes parallel to the operating center line 49 of the drain valve and the drain solenoid valve 41. Therefore, no straining force acts on the connecting rod 42, and therefore the drain electromagnetic valve 41 operates smoothly.

Effects of the Invention As is clear from the description of the embodiments described above, the brake device for a washing machine of the present invention has a connection plate and a drain solenoid when the drain solenoid valve is operated to open the drain valve and rotate the brake lever. No force is applied to the plunger of the valve, which prevents malfunction of the drain electromagnetic valve and decrease in drain stroke, which has a great practical effect.

[Brief explanation of the drawing]

FIG. 1 is a plan view of essential parts of a brake device for a washing machine according to the present invention;
Fig. 2 is an explanatory diagram of the operation of the brake lever of the brake device, Fig. 3 is a sectional view of a washing machine equipped with the same brake device, Fig. 4 is a sectional view of the mechanical unit section of Fig. 3, and Fig. 5 is a sectional view of the mechanical unit section of Fig. 3. A sectional view of the drain valve and the drain solenoid valve section, FIG. 6 is a plan view showing the positional relationship between the conventional brake section and the drain valve section, and FIGS. 7 and 8 are
Each figure is a plan view showing the contact relationship between a conventional brake lever and a pipe portion. 34...Brake lever, 4o...Group/connection plate, 41...Drainage solenoid valve, 43.Old...operator,
45...Abutment surface, 46.47...Abutment point. Name of agent: Patent attorney Shigetaka Awano 1 person 43
- 11 works of Kango Ir --- Togito l! @Figure 2 4q-'Jヰ□, 4. . Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A brake lever that rotates to perform braking during spin-drying and washing and spin-drying of the washing tub, a connecting plate that connects the drain solenoid valve and the drain valve, and a connecting plate that is fixed to the connecting plate and comes into contact with the brake lever. The contact surface of the brake lever is formed by a gentle curve between a point centered on the operating axis of the drain valve and the drain solenoid valve when the brake lever is released, and a point that contacts the actuator when braking. A brake device for a washing machine that has an integral shape so that the reaction force of the brake lever acts on the operating axis of the drain valve and drain solenoid valve when the brake is released.