JPH0199597A - Washer - Google Patents

Abstract

PURPOSE: To suppress noises at the time of opening and closing a water discharge valve and to reduce the cost of change from a solenoid system by rotating a resistance body in oil and attenuating the restoration force at the time when a connection rod is pulled by a motor and a connection line to open a water discharge value at the time of opening the water discharge value and restoration is performed by the urging force of a spring at the time of closing it. CONSTITUTION: A through-hole 36 is opened at the almost center part on a control body 35 and passing is performed only in one direction by a check valve 37. A connection part 44 for connecting the connection line 43 is provided on an outer periphery far from the center of the rotary shaft 21 of a cam 42 and a boss 45 for winding the connection line 43 is projectingly provided around the shaft. When the rotary shaft 21 is rotated, the cam 42 is rotated as well, the connection line 43 is wound around the boss 45, the connection rod 4 is pulled and the water discharge valve 66 is opened. At the time of closing it, the excitation of a solenoid 19 is interrupted, the engaged state of a clutch gear 16 and a gear 13 is released by the energizing force of the spring 17 and the restoration to a closing direction is performed by the energizing force of the spring 4. At the time, the resistance body 38 is also turned clockwise together with the rotary shaft 21 and an impact sound is extremely reduced by a buffer effect by the oil.

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to a washing machine.

(b) Prior Art The structure of a conventionally well-known washing machine will be explained with reference to FIGS. 8 and 9.

A mounting base (53) with a hollow cross section is screwed onto the bottom of an outer tank (52) that holds a washing/dehydration N (51) (hereinafter referred to as a washing tank), and the outer tank (53) of this mounting base (53) is At both ends protruding from the hanging rod (52), there are five hemispherical receiver seats (55
) (55) are integrally formed. Also, outer tank (52)
Similar catches (56) (56) are also integrally molded on the lower side wall of the board in the direction perpendicular to the line connecting the catches (55) (55), and these seats (55) (56) and the hanging rod A hemispherical body (57) and a compression spring (58) are interposed on the lower end surface of (54), and the outer tank (52) is elastically suspended within the machine frame (not shown) using a hanging rod (54). are doing. The mounting base (53
) are provided with flange portions (59) (5
9) is bent and molded, and a case (62) of an upper bearing (61) that pivotally supports the drive shaft (60) of the washing tub (51) is integrally molded in the center of the mounting base (53). ing. The case (64) of the lower bearing (63) of the drive shaft (60) is screwed onto the flange portions (59) (59). The flange portions (59) (59) include
Furthermore, a motor (65), a drain valve (66), and the drain valve (6
The solenoid (6) opens and closes the solenoid (6) via the connecting rod (67).
8) is screwed on. (69) is a rotary blade, whose blade shaft (70) passes through the drive shaft (60), and a pulley (71) is fixed to the lower end, which is fixed to the pulley (71) and the motor shaft (72). The pulley (73) is disconnected via a belt (74). (7S) is a clutch that controls the transmission of power to the drive shaft (60).

Therefore, when draining water, the solenoid (68) is energized,
The drain valve (66) opens. - However, when the drain valve is opened using the suction force of a solenoid, a loud sound is generated when the plunger (connecting rod) is suctioned, causing noise.

Therefore, Japanese Patent Publication No. 62-32959 (D06F 39108) discloses a system in which the drain valve is opened using a small torque motor to suppress noise.

(C) Problems to be Solved by the Invention In the conventional example described above, the connecting rod of the drain valve is locked to the cam attached to the rotating shaft of the torque motor. It was necessary to devise the shape and guide mechanism of the connecting rod, and when changing from the solenoid system, the drain valve also had to be replaced, resulting in high costs.

In view of these conventional problems, the present invention aims to suppress the noise generated when the drain valve opens and closes in a washing machine, and to reduce the cost of changing from the conventional solenoid system.

(d) Means for Solving the Problems The washing machine of the present invention includes a drain valve provided in the drain path of the washing tub, a spring that biases the drain valve in the closing direction, and a spring that biases the drain valve in the closing direction. A motor connected to a connecting rod for opening via a connecting line, a boss that is attached to the rotating shaft of the motor and winds up the connecting line by the rotational force of the motor, and a boss that surrounds the rotating shaft. The damper chamber includes a damper chamber provided in a liquid-tight manner, oil filled in the damper chamber, and a resistor attached to the rotating shaft in the damper chamber.

(E) Action: The connecting wire is wound up by the rotational force of the motor, and the connecting rod is pulled to open the drain valve.

When the drain valve is closed, it is returned to its original position by the biasing force of the spring, but at this time, the resistor rotates in the oil, which provides a rapid damping force to the returning force of the drain valve.

(f) Examples Embodiments of the present invention will be described based on the drawings.

However, the same reference numerals will be used for the same parts as in the conventional example, and the explanation will be omitted.

In FIG. 1, the drain valve (66) is connected to the drain pipe (1).
a valve case (2) integrally formed with the valve case (2);
a bellows-shaped valve body (3) for opening and closing the valve seat (2a); a connecting rod (4) connected to the valve body (3) and for pulling the valve body (3); and a connecting rod (4) for pulling the valve body (3). (4) and a spring (5) that always biases the valve body (3) in the closed east direction.

(6) is a torque motor mechanism for opening the drain valve (66) in place of the solenoid (68), and will be described below with reference to FIGS. 3 and 4.

(7) is a lower case made of resin that houses the stator (8) windings, rotor (9), etc., and spacers (10) having various glaze receiving parts are installed on the upper surface of the lower case (7). A resin upper case (11) is fixed therebetween.

A small gear (12) is formed on the rotor (9) and is meshed with a gear (13). The gear (1
3) A concave and convex portion (14) is formed concentrically on the top surface,
On the other hand, a clutch gear (16) having a concavo-convex portion (15) that engages with the concave-convex portion (14) is coaxially supported with the gear (13) so as to be vertically movable. Reference numeral (17) denotes a spring that urges the clutch gear (16) upward, thereby releasing the engagement between the uneven portions (14) and (15). (18) is 4i! at the upper end of the clutch gear (16). The placed plunger (19) is a solenoid that sucks the plunger (18) and moves it downward.
(20) is a commutator for applying direct current to the solenoid (19).

(21) is a rotating shaft of the torque motor mechanism, the upper part of which protrudes from the upper case (11), and the lower part of which is attached a drive gear (22) and a switch operating cam (23). The clutch gear (16) and the drive gear (22) are connected via reduction gears (24), (25), and (26).

(27) and (28) are electrode plates having contacts (27a) and (28a) for turning on and off electricity to the stator (8), and when the switch operating cam (23) rotates by a predetermined angle, the One (28) of the electrode plates (27) (28) fits into the recess (29) of the switch actuating cam (23), the contacts (27a) (28a) are separated, and the stator (
8) is cut off.

Now, on the upper surface of the upper case (11), the rotation shaft (
21), an annular wall (30) is integrally formed, and this annular! 1! The upper surface of the damper chamber (30) is covered liquid-tightly with a lid (31) by ultrasonic welding to form a damper chamber (32). (33) and (34) are sealing members.

In the damper chamber (32), a plate-shaped regulating body (35) is integrally formed from the annular wall (30) and protrudes toward the rotating shaft (21). ) has a through hole (36) in the center of the flap. The through hole (36) is then closed by the check valve (37),
Passage in only one direction is allowed. (38) is a resistor attached to the rotating shaft (21), and the regulating body (
It has three resistance plates (39), (40), and (41>) that protrude toward the annular wall (30) in the same direction as the protrusion direction of 35) and in a direction shifted by about 50 degrees to the left and right, respectively. Further, the damper chamber (32) is filled with grease or silicone oil.

(42) is a circular cam, which is eccentrically mounted M8 at the upper end of the rotating shaft (21), and a connection line ( 43) is provided, and a boss (45) for winding up the connecting wire (43) is provided protruding around the shaft.

The connecting line (43) is made of wire, and has one end (43).
3a) is connected to the connection part (44), and the other end (43b
> extends in a straight line with the operating direction of the connecting rod (4) and is connected to the connecting rod (4).

The operation will be explained based on this configuration.

When the voltage converted into direct current by the commutator (20) is applied to the solenoid (19), the plunger (
18) is attracted and moves downward, and the clutch gear (16)
The concave and convex portions (14) and (15) of the gear (13) engage with each other. On the other hand, the contact (27) is connected to the stator (8).
AC voltage is applied through a> (28a), and the rotor (9) rotates. This rotational force is applied to the small gear (12
), the drive gear (22) via the gear (13), the clutch gear (16), and the reduction gears (24, 25, and 26)
), thereby causing the rotating shaft (21) to rotate counterclockwise.

When the rotating shaft (21) rotates, the cam (42) also rotates, so that the connecting line (43) connects to the boss (45).
is wound around the connecting rod (4), and the connecting rod (4) is pulled;
The drain valve (66) opens against the urging force of the spring (5). At this time, as shown in Figures 1 and 2, the cam (42) was installed in an eccentric position so that the rotational torque at the end of winding was greater than the rotational torque at the beginning of winding (Figure 2). (Middle A>B), at the end of winding when the biasing force of the spring (5) becomes stronger, a large rotational torque can be obtained, and the winding time is shortened accordingly (this is as shown in Fig. 7). It can be seen from the fact that the slope of the tensile force characteristic is gentler compared to the load characteristic (mainly due to the spring (5)), and the time required to obtain the desired stroke is correspondingly shorter.

Further, when the drain valve (66) is opened, the rotating shaft (21
) rotates, the resistor (38) rotates within the damper chamber (32), but since the oil flow direction is the direction in which the check valve (37) is opened, the oil flows through the regulator (38). 35) through the through hole (36). Therefore, the buffering effect of the oil is small, and the load applied to the motor is inevitably reduced.

Now, when the cam (42), the resistor (38), and the switch actuation cam (23) each rotate by a predetermined angle (approximately 100 degrees), the electrode plate is placed in the recess (29) of the switch actuation cam (23). One of the contacts (28) is fitted, and the contacts (27a) and (28a) are separated. Therefore, the power supply to the stator (8) is cut off, the rotation of the rotor (9) is stopped, and the rotor (9) is held in this state by the reverse rotation stoppage mechanism. Therefore, the drain valve (66) can be kept open.

To close the drain valve (66), the solenoid (1
9) is de-energized, and the biasing force of the spring (17) is applied.
The engagement state between the clutch gear (16) and the gear (13) is released (the state shown in FIG. 3). Then, the rotation axis (21
) can rotate freely, so the urging force of the spring (5) causes the valve body (3) and the connecting rod (4) to rotate freely.
) and the connecting line (43) return in the closing direction.

At this time, the connecting line (43) is stretched and the cam (
42) rotates clockwise, the rotation shaft (21)
At the same time, the resistor (38) also rotates clockwise, and due to the buffering effect of the oil, a sudden damping force is applied to the return force of the valve body (3), thereby extremely reducing the impact noise when the valve is closed. .

At this time, since the oil flows in a direction that closes the reverse valve (37), the oil does not pass through the through hole (36) and the buffering effect does not deteriorate.

Note that the through hole (36) and check valve (37) may be provided in the resistor (38).

(G) Effects of the Invention According to the present invention, in a washing machine, the drain valve is opened by a motor instead of a solenoid, so that no impact noise such as the solenoid suction noise is generated.

Moreover, since a conventional solenoid valve can be used as the drain valve, the cost of modification work can be reduced.

.

In addition, when the drain valve returns to the closing direction due to the urging force of the spring, the resistor also rotates together with the rotating shaft, so the resistance between the resistor and the oil provides a large damping force to the return of the drain valve. Therefore, the impact noise at the time of occlusion can be considerably suppressed.

Therefore, a washing machine with high commercial value can be provided.

[Brief explanation of the drawing]

Fig. 1 is a diagram of the drain valve opening/closing mechanism in the washing machine of the present invention, Figs. 2 (a) and (b) are explanatory diagrams of the operation of the connecting wire winding cam, and Fig. 3 is a side sectional view of the torque motor mechanism. , Figure 4 is the third
In the figure, a sectional view of the reduction gear part, FIG. 5 is a diagram of the operating mechanism of the switch actuating cam, and FIG. FIG. 7 is a sectional view of the J middle damper chamber, FIG. 7 is a load characteristic and tensile force characteristic when the drain valve is open, FIG. 8 is a sectional view of the main part of a conventional washing machine, and FIG. 9 is a bottom view of the same. (4)...Connection rod, (5)...Spring, (6)
... Torque motor mechanism (motor), (21) ... Rotating shaft, (32) ... Damper chamber, (3B) ... Resistor, (43) ... Connection line, (45) ... ...Boss, (5
1)...Washing/dehydration tank (washing tank), (66)...Drain valve.

Claims (1)

[Claims] (1) A drain valve provided in the drain path of the washing tub, a spring that biases the drain valve in the closing direction, and a motor connected via a connecting line to a connecting rod for opening the drain valve. a boss attached to the rotating shaft of the motor and for winding up the connecting wire by the rotational force of the motor; a damper chamber provided in a liquid-tight manner surrounding the rotating shaft; and a damper chamber filled with liquid. 1. A washing machine comprising: a resistor mounted on the rotary shaft within the damper chamber.