JPH0316630Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drive device that switches between washing and dewatering operations in an automatic washing machine, and more specifically, the direction of rotation of an electric motor is controlled by a lever driven by a solenoid plunger and a cam clutch of the electric motor. The present invention relates to a drive device characterized in that the rotation of an electric motor is smoothly transmitted to an operating lever.

As shown in the cross-sectional view of Figure 1, a single-tub washing machine has
A top lid 2 is provided on the top of the outer box 1, and a water receiving tank 3 is attached inside the box 1 by vibration isolators 4, 4, 4, 4. Inside the water tank 3 is a washing/dehydration tank 5.
A wing body 6 that rotates during washing is provided in the washing/dehydration tank 5. When washing,
The washing and dewatering tank 5 does not rotate, and the driving force of the drive motor 7 is transmitted to the mechanism section 8 by a pulley or a belt to rotate the wing body 6. The rotation of the blades 6 agitates the washing water and performs washing.

On the other hand, during dewatering, the washing/dehydrating tub 5 itself rotates. That is, the driving force from the drive motor 7 is directly transmitted to the washing and dehydrating tub 5 via the mechanism section 8. A switching lever 9 is provided to switch the driving force of these drive motors 7 during washing and during dehydration. This switching lever 9 is actuated by a drive device 10,
During washing, this operation closes the drain valve 11.

On the other hand, during dewatering, the driving device 10 operates the switching lever 9 to rotate the washing/dehydrating tank 5 and open the drain valve 11 to drain the washing water from the drain duct 12.

As described above, the drive device 10 operates the switching lever 9 and opens and closes the drain valve 11, and its general structure is as shown in FIG. The operating lever 9 is actuated by the rotation of the output shaft 102, and the drive motor is also actuated by the switching cam 103 and the switch 104.

Furthermore, gears 105, 106, and 107 are provided between the small electric motor 101 and the output shaft 102, respectively. The meshing control of these gears is performed by meshing a gear 107 attached to a plunger 109 of a solenoid 108 with another gear 106.

However, although the transmission of driving force through the meshing of these gears has excellent mechanical strength, there are various problems such as the meshing does not go smoothly during switching, the gears are damaged and worn, and the noise generated during meshing is large. A problem had arisen.

The present invention has been devised in view of the above-mentioned problems, and provides a drive device that controls the cam clutch of the electric motor using a plunger of a solenoid and a driven lever to smoothly transmit the rotation of the electric motor to an operating lever. It is something.

Hereinafter, the driving device of the present invention will be explained based on the drawings.

FIG. 3 is a schematic plan view illustrating the drive device.

Moreover, FIG. 4 is a sectional view taken along the line A--A in FIG. 3.

The main structure of this drive device is a small electric motor 200
, a solenoid 300 and a lever 400.

A cam clutch 500 is fixed to the rotating shaft of the small electric motor 200. This cam clutch 500 has clutch protrusions 501, 501 that abut against one end 401 of the lever 400 and are provided axially symmetrically.

On the other hand, the plunger 301 of the solenoid 300
One end of a lever 400 is pivotally supported at the outer tip of the lever 400 . This lever 400 is pivotally connected to a pivot 402 at one end 401 on the cam clutch 500 side and approximately at the center of the plunger 301. Also one end 40
1 and the pivot shaft 402, a coil spring 403 is biased so as to release the clutch protrusion 501.

The rotation of the small electric motor 200 is transmitted to the link shaft 205 via a gear 202 fixed to the rotating shaft 201 of the small electric motor 200 and other gears 203. This link shaft 205 has a link arm 60
0 is fitted on one end, and the other end is fitted with an operating lever 700.
is pivotally mounted via a pivot 601.

The operation of the drive device having the above configuration will be further explained.

First, during washing, the solenoid 300 is not energized because the drive motor can be directly transmitted to the blades in the washing/dehydration tank. Therefore, the lever 400 is pulled around the pivot 402 by the coil spring 403.

That is, the one end 401 is in a state where it does not collide with the clutch protrusion 501 of the cam clutch 500 (the state shown by the solid line in FIG. 3). Also, the operating lever 700
The drain valve is also in a pulled back state (solid line in FIG. 3) by a spring (not shown) of the drain valve.

Next, in order to perform drainage and dewatering, when a predetermined changeover switch is turned on, the small electric motor 200 rotates.
Almost simultaneously, the solenoid 300 is energized and the plunger 301 is attracted in the X direction, and the lever 400
is centered on the pivot 402 and becomes the state shown by the two-dot chain line in FIG.

In such a state, one end 40 of the lever 400
1 comes into contact with the clutch protrusion 501 of the cam clutch 500. However, if the rotating shaft 201 of the small electric motor 200 is rotating in the Y direction, the rotating shaft 201 continues to rotate and is transmitted to the link shaft 205 via intermediate gears such as gears 202, 203, and 204. That is, when the rotation of the small electric motor 200 is transmitted to the link shaft 205, the operating lever 700 is moved in the Z direction (third direction) by the link arm 600.
the state indicated by the two-dot chain line in the figure).

As a result, the switching lever 9 provided on the operating lever 700 is actuated, and the rotational force of the drive motor 7 is transmitted to the washing and dehydrating tub.

The drain valve 11 is also opened to enable draining during dewatering.

In this situation, micro switch 80
0 is turned on by the link arm 600, and the small electric motor 200 is de-energized. small electric motor 2
00 is de-energized, the operating lever 700 is pulled by the return force of the spring of the drain valve 11, but since the clutch protrusion 501 of the cam clutch 500 is in contact with one end 401 of the lever 400, the rotating shaft 201 is Do not rotate in the opposite direction.

Therefore, rotation of the rotating shaft 201 is prevented, and the link shaft 205 is connected to the gear 202 and the intermediate gear 2.
03 and 204, it becomes fixed.

That is, even if the rotation of the small electric motor 200 stops, the switching lever 9 and the drain valve 11 are kept in the dewatering and draining states, respectively, by the operation lever 700.

Next, when the dewatering and draining operations are completed or the energization is cut off, the energization to the solenoid 300 is also cut off, the suction of the plunger 301 is released, and the lever 400 is pulled by the coil spring 403. One end 401 and clutch protrusion 501
The contact between the two is released. As a result, the operating lever 70
0 is released, the operating lever is pulled in the direction opposite to the Z direction by the spring provided in the drain valve 11, and the switching lever 9 rotates the wing body and closes the drain valve 11.

As described above, the switching drive device of the present invention can control the rotational direction of the electric motor using a lever driven by a solenoid and a cam clutch attached to the rotating shaft of the electric motor. Compared to a drive device that switches by switching, it is extremely accurate, causes less mechanical wear, and produces no noise, which has great practical effects.

[Brief explanation of the drawing]

Fig. 1 is a sectional view illustrating a single-tub washing machine, Fig. 2 is a partially omitted sectional view illustrating a conventional switching drive device, and Fig. 3 is a sectional view illustrating a switching drive device according to the present invention. The plan view, FIG. 4, is a sectional view taken along the line A--A in FIG. 3. In the figure, 200 is a small electric motor, 300 is a solenoid, 400 is a lever, 401 is one end of the lever, 500 is a cam clutch, 501, 501 are clutch protrusions, 600 is a link arm, 700 is an operating lever, and 800 is a micro switch. It is.

Claims (1)

[Claims for Utility Model Registration] A device that transmits the rotation of an electric motor to an operating lever to switch between washing and dewatering operations, and the direction of rotation of the electric motor is controlled by a lever driven by a plunger of a solenoid and a cam clutch of the electric motor. In the lever, the lever is pivoted approximately at the center thereof, is pivotally supported at one end by a plunger of a solenoid, has the other end abutted against the cam clutch, and is biased toward the other end by a coil spring. The cam clutch is biased toward the lock/release side, and the cam clutch is fixed to the rotating shaft of the electric motor, and is provided with a pair of axially symmetrical clutch protrusions for stopping the other end of the lever. A switching drive device for washing and dehydration.