JPH04210092A - Drum washing and drying machine - Google Patents

Abstract

PURPOSE:To facilitate the stop of a drum which requires high braking torque by providing additionally a small-sized negative action solenoid brake. CONSTITUTION:A negative action solenoid brake 24 has a solenoid coil 24a, a brake plate 24b and a brake disc 24c as its main components. At a time of washing and drying, the solenoid coil 24a is power-supplied to attract the brake plate 24b, while the brake disc 24c connected directly to a motor shaft 11 is in a free rotation. Thus, at the time of washing and drying, rotation of a driving motor 9 is transmitted to a rotary drum 3 by a prescribed rotation number after reducing by a planet gear and a belt. Further, when the negative action solenoid brake 24 starts in this state and brakes the motor shaft 11, a braking force on the rotary drum 3 is inversely proportional to a reduction by the planet gear and the belt, becoming ten times if a reduction ratio is one-tenth. Thus, by additioning a small-sized negative action solenoid brake and a drum position sensor, the rotary drum requiring high braking torque can be stopped easily and smoothly at a prescribed position.

Description

[Detailed description of the invention]

[00011

[Industrial Application Field] This invention is a drum type in which a rotating drum that serves as both a washing tub and a dehydrating tub is rotatably supported horizontally, washing and drying are performed at low rotation speeds, and centrifugal dewatering is performed at high rotation speeds. This invention relates to a top-loading type drum-type washer-dryer in which laundry is loaded and unloaded from the top. [0002] [Prior art and problems to be solved by the invention] Generally,
This type of drum-type washing machine performs washing, dehydration, and drying by changing the rotation speed of the rotating drum, but conventional top flow washing machines do When the stopping position of the rotary drum is uncertain and the laundry is to be taken out or put in, it is necessary to manually adjust the cloth take-out section of the rotary drum each time. [0003] This invention was made in consideration of these circumstances, and by adding a small negative actuation electromagnetic brake to the conventional mechanism, it is easy to stop the drum that requires high braking torque, and Equipped with a drum that can easily stop at a fixed value by incorporating a drum position sensor.In other words, the rotating drum stops smoothly, and when the operation is stopped, the cloth take-out part of the rotary drum always matches the cloth take-out part of the water tank. To provide a top flow type drum type washer/dryer which eliminates the need for a user to manually adjust the drum position when loading and unloading cloth. [0004]

[Means for Solving the Problems] The present invention includes a main body case, a water tank housed in the main case and equipped with a cloth take-out part, and a water tank that doubles as a washing tank and a dehydration tank, and is horizontally and rotatably supported in the water tank. , a rotating drum having a cloth take-out section, a drum position sensor that detects the rotational position of the rotating drum, a drive motor, a negative-actuation electromagnetic brake that brakes the drive motor when power supply is stopped, and rotation of the drive motor. and a transmission means for transmitting the stoppage to the rotating drum in a decelerating manner, and a selection means for selecting whether or not to perform the deceleration operation of the rotation transmission in accordance with the washing and dehydration process. Make sure that the cloth outlet of the aquarium matches the position.
Based on the output of the drum position sensor, stopping power supply to the negative operation electromagnetic brake, and increasing the braking torque of the negative operation electromagnetic brake by the rotation transmission means,
This is a drum type washer/dryer characterized by transmission to a rotating drum. [0,0051 The rotation transmission means includes a drive motor to which a negative actuation electromagnetic brake is attached, an output shaft coaxially attached to the outer periphery of the motor shaft of this drive motor so as to be relatively rotatable, and fixed to this output shaft. A motor pulley, a drum pulley fixed to a rotating drum, a belt hung between the motor pulley and the drum pulley, a reduction gear mechanism that reduces rotation from the motor shaft, and a reduction gear mechanism that reduces rotation from the reduction gear mechanism. It is preferable to include a motor clutch that transmits data to the output shaft, and a centrifugal clutch that is fixed to the motor shaft and switches and transmits rotation to the motor pulley during dewatering operation. The drum position detection sensor may be configured by attaching a reed switch to the outer wall of the rotating drum and attaching a permanent magnet to the inner wall of a drum pulley directly connected to the drum shaft. [0006] Here, as the drive motor, a brushless variable speed motor with easy speed change is desirable. Further, the drum position sensor can also be composed of a light emitting element and a light receiving element. Note that a negative actuation electromagnetic brake is a type of brake that releases braking when power is supplied and applies braking when power supply is stopped.
A mold is used. [00071

[Operation] During washing and drying, the selection means activates the deceleration operation of the rotation transmission means, the rotational force of the drive motor is decelerated, and the rotary drum is rotated at a low speed. During dewatering, the selection means does not activate the deceleration operation of the rotation transmission means, so the rotational force of the drive motor rotates the rotary drum at high speed. [0008] When the operation is stopped, the power supply to the negative actuating electromagnetic brake is stopped based on the output of the drum position sensor, and the braking torque of the brake is increased by the deceleration operation of the rotation transmission means, and the rotation drum and each cloth take-out part of the water tank are The rotating drum stops so that the positions of the two coincide with each other. [0009] By the way, the torque required to stop the rotating drum during washing is about 200 kg-cm. If this torque is applied directly to the rotating drum, especially during dehydration operation when the rotating drum rotates at high speed, the rotating drum will shake violently due to the reaction, causing the water tank to come into contact with the main body case. There is a risk of [00101 By providing a motor clutch for braking the negative action electromagnetic brake attached to the drive motor,
It is possible to switch between a single drive motor or a rotating drum. Furthermore, even if the power supply is stopped during dewatering and the negative action electromagnetic brake is activated, no braking force is directly applied to the rotating drum. [00111 Since the braking force applied to the drum by the negative action electromagnetic brake is increased by the rotation transmission means, for example, if the reduction ratio is 1/10, the torque required for braking of 200 kg-cm may be 20 kg-cm. Become. [0012] Embodiments The present invention will be described in detail below based on embodiments shown in the drawings. This invention is not limited by this. [00131 FIG. 1 schematically shows the structure of a drum-type washing machine according to an embodiment of the present invention, in which 1 is a main body case, 2 is a water tank, 2a is a cloth take-out part of the water tank, 3 is a rotating drum, 3a is the cloth take-out part of the rotating drum, 4, that is, 4
a and 4b are drum shafts that support the rotating drum; 6 is a belt; 7 is a motor pulley; 5 is a drum pulley that is fixed to the drum shaft 4 and transmits the rotation of the motor pulley 7 via the belt 6; 9 is a drive motor; Reference numeral 8 designates a transmission mechanism assembly for variable speed rotation of the drive motor 9, 10 a drain valve for draining washing liquid or rinsing liquid in the water tank 2, and 25 a drum position sensor. [0014a] FIG. 2 shows a cross section of the operation of the transmission mechanism assembly 8 during washing or drying, and 11 is the motor shaft of the drive motor 9, and the sun gear 1 meshes with the planetary gear 13.
2, and the clutch weight 1 of the centrifugal clutch 28
4, the clutch arm 15 rotates periodically. 16 supports the planetary gear 13 and connects the motor clutch 1
This is a planetary gear support fitted with 7. 18 is an internal gear that meshes with the planetary gear 13, and the internal gear 18 is connected to the gear outer box 19.
Fixed by The motor clutch air control plate 17d is in a state where it has been pulled out from the roller 17b by the signal motor 20. [0015a Figures 3 and 4 show operational cross-sections of the motor clutch during washing and drying. Here, the roller 17b is moved by the outer ring 17a by the spring 17e integrated into the retainer 17c.
is pressed so as to bite between the inclined surface of the output shaft 23 and the output shaft 23. Here, the driving force is transmitted to the output shaft 23 by the rollers 17b when the outer ring 17a rotates counterclockwise, and by 17b' when the outer ring 17a rotates clockwise. Note that FIGS. 5 and 6 show cross sections of the operation of the motor clutch during dehydration, and when the signal motor 20 pushes the control plate 17d (
If inserting a roller push plate, insert the outer ring 1 through that plate.
7a and the output shaft 23 are mutually free. In the figure, the guide pin portion 17h of the control plate 17d is connected to the roller 17.
Although the shape allows free rotation in only one direction b, it is also possible to have free rotation in both directions. 7 to 9 are perspective views showing a series of operations of the motor clutch described above, with FIG. 7 showing a developed view, FIG. 8 showing a state during washing and drying, and FIG. 9 showing a state during dehydration. . [0016] The centrifugal clutch 28 is shown in FIG. 1 when viewed from the front.
0, a motor shaft 11, a clutch weight 14, a clutch lining 14a, a clutch arm 1
During washing and drying, the clutch weight 14 is pulled inward by the clutch spring 22 and does not come into contact with the motor pulley 7 because the motor shaft 11 rotates at a low speed.
reference). Note that during dewatering, the rotation speed of the motor shaft 11 becomes high speed, and the centrifugal force of the clutch weight 14 becomes larger than the clutch spring 22 that pulls the clutch weight 14 inward.
is connected to the motor pulley 7 via the clutch lining 14a.
(See Figure 11). [0017a The negative operation electromagnetic brake 24 is the electromagnetic coil 24
a, a brake plate 24b, and a brake disc 24c are the main components, and during washing and drying, the electromagnetic coil 24a is supplied with power and attracts the brake plate 24b, and the motor shaft 11
The brake disc 24C, which is directly connected to the brake disc 24C, is in a free rotation state. [0018] In this way, during washing and drying, the rotation of the drive motor 9 transmits a predetermined rotation to the rotating drum 3 by the planetary gear system and belt reduction. In addition, in this state, the negative action electromagnetic brake 24 is activated, and the motor shaft 11
When braking is applied, the braking force on the rotating drum is inversely proportional to the planetary gear and belt reduction; for example, when the reduction ratio is 1/1
If it is 0, it will be multiplied by 10. [00191 FIG. 11 shows a cross section of the operation of the variable speed mechanism assembly during dehydration. As already mentioned, the control plate 17d of the motor clutch is connected to the signal motor 20 when the roller 1
7b and the output shaft 23, and as a result, the rotation of the planetary gear support 16 and the rotation of the output shaft 23 become free. Further, the clutch weight 14 is in pressure contact with the motor pulley 7 via the clutch lining 14a. [00201] In this way, the rotation of the drive motor 9 is freed from deceleration by the planetary gear device and becomes only belt deceleration, and a predetermined dewatering rotation is transmitted to the rotary drum 3. At this time,
The negative action electromagnetic brake 24 has an electromagnetic coil 24a as in FIG.
is attracting the control plate 24b, and the motor shaft is in a state of free rotation. [00211 In this state, even if the negative action electromagnetic brake 24 operates and the outer ring 17a stops and the clutch weight 14 separates from the motor pulley 7, the output shaft 23 remains free from the outer ring 17a, and the output shaft 23 and the belt The brake does not act on the rotating drum that is transmitting rotation. [0022a FIG. 12 shows the drum position sensor 25. The permanent magnet 25a is attached to the drum pulley 5, and the reed switch 25b is attached to the water tank 2 (Fig. 1
) is installed. [o o 23] FIG. 13 shows the main part of the electrical system diagram of the top-loading washer/dryer according to the present invention, and here, the process at the end of operation will be described in particular. At the end of the operation, the timing of the signal from the timer 26 and the signal from the drum position sensor 25 is controlled by the control circuit 27, and the negative action electromagnetic brake 24 is activated. More specifically, the rotation speed of the rotary drum 3 during washing and drying is 50 rpm, but when washing or drying is finished, the power supply to the drive motor 9 is temporarily stopped, and then the rotation speed is set for a preset time by the timer 26. (for example, 3 seconds) and when the rotating drum 3 stops, the drive motor 9 is started again, and when the rotation speed of the rotating drum 3 reaches 30 rpm, the drive motor 9 and the 24 power supply to the negative action electromagnetic brake is stopped. When stopping the rotating drum from a dehydration state where the rotational speed is 150 rpm, similarly, the power supply to the drive motor 9 is temporarily stopped, and then the time preset by the timer 26 (for example, 1 minute and 30 seconds) has elapsed. Then, when the rotating drum 3 stops, the drive motor 9 is started again, and the rotating drum 3
When the rotational speed of the rotary drum 3 reaches 3 Orpm, the power supply to the drive motor 9 and the negative action electromagnetic brake 24 is stopped based on the signal from the drum position sensor 25, and the rotary drum 3 suddenly stops. In this way, when the operation is stopped, the positions of the cloth take-out part of the rotary drum 3 and the cloth take-out part of the water tank 2 are always aligned. [0024] In this embodiment, when stopping the operation, the rotation of the rotating drum 3 is temporarily stopped, and then the position of the rotating drum 3 is detected after restarting. Stopping the supply so that the rotating drum 3
It is also possible to detect the position of the rotating drum 3 when the rotation speed gradually decreases to 30 rpm and stop the rotating drum 3 at a predetermined position. [0025] The configuration of the drum type washer/dryer is summarized as follows. [0026] The drum-type washer/dryer of the present invention includes a variable speed drive motor for switching a centrifugal clutch, a negative-actuation electromagnetic brake for braking this drive motor, and a speed reducer with a certain speed reduction ratio, The reducer includes a planetary gear meshing with a sun gear on an input shaft in a gear box, an internal gear meshing with the planetary gear, a planetary gear support supporting the planetary gear,
It consists of a motor clutch that connects or disconnects the planetary gear support and the output shaft. A signal motor is installed outside the gear box, and the motor clutch is switched by the operation of the signal motor.
Switch the planetary gear support and output shaft to a fixed or free state. The output shaft is a hollow shaft to which a motor pulley is fixed, and when locked by the signal motor, the rotation of the motor shaft is decelerated and transmitted to the motor pulley. The motor shaft is fixed to a clutch arm that holds the clutch weight of the centrifugal clutch, and transmits the rotation necessary for switching the centrifugal clutch to the centrifugal clutch. When the output shaft becomes free, the clutch weight is brought into pressure contact with the motor pulley via the clutch lining bonded to the clutch weight, so that the motor shaft transmits rotation at the same speed as the drive motor to the motor pulley. Further, a drum position sensor is formed on the rotating drum and the outer wall of the water tank. [00271] With the above configuration, the rotating drum of this washer/dryer rotates at a reduced speed via the speed reduction mechanism during washing and drying, and is directly connected to the drive motor and rotates at high speed during dehydration. In addition, at the end of operation, the negative electromagnetic brake is activated based on the signal from the drum position sensor, and the braking torque is increased and transmitted to the rotating drum through the deceleration mechanism, so that the rotating drum stops smoothly at a predetermined position. do. [0028]

[Effects of the Invention] This invention adds a small negative actuation electromagnetic brake and a drum position sensor to the conventional mechanism.
A top-flow in-get type washing machine that can easily and smoothly stop a rotating drum that requires high braking torque in a predetermined position, and that the cloth take-out part of the rotary drum always matches the cloth take-out part of the water tank when the operation is stopped. By providing a dryer, it becomes unnecessary to manually rotate a drum when taking out cloth.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration explanatory diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram of the operation of the variable speed mechanism during washing and drying.

FIG. 3 is an explanatory diagram of the operation of the motor clutch during washing and drying.

FIG. 4 is an enlarged view of the main part of FIG. 3;

FIG. 5 is an explanatory diagram of the operation of the motor clutch during dehydration.

FIG. 6 is an enlarged view of the main part of FIG. 5;

FIG. 7 is a perspective view illustrating the operation of the motor clutch.

FIG. 8 is a perspective view illustrating the operation of the motor clutch.

FIG. 9 is a perspective view illustrating the operation of the motor clutch.

FIG. 10 is a front view of the centrifugal clutch.

FIG. 11 is a diagram corresponding to FIG. 2 when the variable speed mechanism is dehydrated.

FIG. 12 is a perspective view of a drum position sensor.

FIG. 13 is a diagram showing the main parts of the electrical system.

[Explanation of symbols]

1 Main body case 2　Aquarium 3 Rotating drum 5 Drum pulley 6 Belt 7 Motor pulley 8 Transmission assembly (rotation transmission means) 9 Drive motor 17 Motor clutch 24 Negative action electromagnetic brake 25 Drum position sensor 28 Centrifugal clutch

[Figure 4]

Claims (1)

[Claims] Claim 1: A main body case, a water tank housed in the main body case and equipped with a cloth take-out part, and a rotary machine that doubles as a washing tank and a dehydration tank, is rotatably supported horizontally in the water tank, and is equipped with a cloth take-out part. a drum, a drum position sensor that detects the rotational position of the rotating drum, a drive motor, a negative action electromagnetic brake that brakes the drive motor when power supply is stopped, and a rotating drum that can decelerate the rotation and stop of the drive motor. and a selection means for selecting whether or not to perform a deceleration operation of the rotation transmission according to the washing and dehydration process. In accordance with the output of the drum position sensor, the power supply to the negative working electromagnetic brake is stopped, and the braking torque of the negative working electromagnetic brake is increased by the rotation transmission means and transmitted to the rotating drum. A drum-type washer/dryer that is characterized by: