JPH04256796A - Dehydration/washing machine - Google Patents

Abstract

PURPOSE:To reduce a noise generated when a rotary tub is stopped by comprising a clutch mechanism of a driving side connecting part provided at a driving shaft, and a tub shaft side connecting part interlocked/uninterlocked with a driving side connecting part provided at a tub shaft. CONSTITUTION:The clutch mechanism 12 comprises a clutch claw 30 that is the driving side connecting part, and a movable clutch claw 31 that is the tub shaft side connecting part interlocked/uninterlocked with the clutch claw 30. The clutch claw 30 is arranged in circular shape by forming integrally on the upper plane of a pulley 28, and also, it is provided with a large number of tooth parts protruded upward, and the movable clutch claw 31 is formed almost in cylindrical shape, and is fitted in the lower terminal part of a lower hollow shaft 17. Also, a large number of tooth parts 31b engaged with the tooth parts of the clutch claw 30 are arranged at the lower plane part of the clutch in circular shape, and also, they are protruded downward. When the clutch claw 30 is interlocked with the movable clutch claw 31 in the clutch mechanism 12, and electromagnetic brake is applied to a motor, a braking force is transmitted to the rotary tub via the driving shaft 24, the clutch mechanism 12 and a dehydration shaft 14, therefore, the rotary tub is stopped by applying brake.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine that is equipped with a rotating tub for both washing and washing.

0003

2. Description of the Related Art In this type of dehydrating and washing machine, an agitator in a rotary tub is rotated in forward and reverse directions during washing, and the rotary tub is rotated at high speed during dehydration. At the end of dehydration, the motor is cut off and the rotating tank is braked and stopped by a band brake device. This uses a spring clutch, which is a one-way clutch, as the clutch that transmits the driving force of the drive shaft to the tank shaft, so if you just stop the motor, the drive shaft side will stop, and the spring clutch and tank shaft will stop. This is because the rotating tank rotates for a long time due to inertia.

The above-mentioned band brake device is composed of a brake drum provided on the shaft of the rotating tank and a brake band attached to the outer peripheral surface of the brake drum. When braking with this brake device, the brake drum is wrapped tightly around the brake band, and the brake shoes provided on the brake band are brought into sliding contact with the brake drum.
It is braked by that friction.

[0005]

[Problems to be Solved by the Invention] However, in the above-mentioned conventional configuration, when the rotating tank is braked to stop, the brake band is wrapped tightly around the brake drum that is rotating at high speed, so the noise generated by the sliding of the brake shoes. The disadvantage was that it was quite large. In addition, since braking must be performed every time after dehydration is completed, the number of braking increases considerably, and the brake shoes need to be constructed with high wear resistance. Another problem was that the cost was high.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a dehydrating/washing machine that can reduce the noise generated when the rotary tub is stopped by braking, and can also reduce the cost of the brake device.

[Configuration of the invention]

[0008]

[Means for Solving the Problems] The dewatering/washing machine of the present invention includes a tub shaft of a rotating tub, and a drive shaft that is driven to rotate in forward and reverse directions by a motor to drive an agitator in the rotating tub,
A clutch mechanism is provided to transmit the forward and reverse rotational driving force of the drive shaft to the tank shaft, and the clutch mechanism is connected to a drive-side locking portion provided to rotate integrally with the drive shaft, and a drive-side locking portion provided to rotate integrally with the tank shaft. The tank shaft side locking portion is provided on the tank shaft side and is connected to the drive side locking portion in continuous and non-continuous connection with the tank shaft side locking portion.

In this case, an engaging portion is provided in the tank shaft side locking portion of the clutch mechanism, and when the tank shaft side locking portion is disengaged, the engaging portion engages to prevent rotation of the rotating tank. The engaged portion for stopping may be provided at a stationary portion.

Furthermore, the drive-side locking portion of the clutch mechanism may be formed integrally with the rotating body on the drive shaft side.

[0011]

[Operation] According to the above means, when the drive-side locking portion and the tank shaft-side locking portion of the clutch mechanism are connected in series during dewatering, the tank shaft and the drive shaft rotate together. That is, unlike a conventional spring clutch, the forward rotational driving force and the reverse rotational driving force of the drive shaft are transmitted to the tank shaft. In this case, if the motor rotates the rotating tank at high speed and then electromagnetically brakes the motor at the end of dehydration, the braking force is transmitted to the rotating tank via the drive shaft, clutch mechanism, and tank shaft, so the rotating tank is braked. Stop being done. Therefore, when braking a rotating tank that rotates at high speed, a band brake is not necessarily required, only by electromagnetically braking the motor, so no sliding noise is generated, and therefore, noise is reduced. in this case,
Since the motor is only electromagnetically braked and there are no parts that wear out due to sliding, costs can be reduced to ensure sufficient durability.

Furthermore, when the tank shaft side locking portion of the clutch mechanism is disengaged, the rotation can be prevented by engaging the engaging portion of the tank shaft side locking portion with the engaged portion of the stationary portion. Since the tubs are prevented from rotating, it is possible to reliably prevent the rotating tubs from rotating together during washing, and it is possible to eliminate the need for parts such as a clutch for preventing reversal.

Furthermore, since the drive-side locking portion of the clutch mechanism is integrally formed with the rotating body on the drive shaft side, the structure can be simplified.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. 1 to 5. First, in FIG. 2, a water receiving tank 2 is elastically supported inside an outer box 1 via a hanging rod mechanism 3 so as to be swingable. A rotating tank 4 that serves both as a washing tank and a dehydrating tank is provided in the water receiving tank 2, and an agitator 5 is disposed at the inner bottom of the rotating tank 4. A power control mechanism 6 is fixed to the outer bottom of the water receiving tank 2, and a case 7 of the power control mechanism 6 is composed of an upper case 8 and a lower case 9.

The power control mechanism 6 transmits the rotational force of the motor 10 to the agitator 5 at a reduced speed during washing, and also transmits it to the rotary tank 4 and the agitator 5 during dehydration to rotate both integrally. It is something. As shown in FIG. 1, the power control mechanism 6 includes a reduction gear 11, a clutch mechanism 12, a brake device 13, and the like.

In FIG. 1, a dewatering shaft 14 serving as a tank shaft for driving the rotating tank 4 has a hollow short shaft 1 at its upper end.
5 and a lower hollow shaft 17 are integrally connected by a brake drum 18. The brake drum 18 is made up of a drum body 19 and a lid 20 that closes an opening on the lower surface of the drum body 19. A sleeve 19a integrally formed at the upper end of the drum body 19 is connected to the above-mentioned upper hollow shaft 16, and the above-mentioned lower hollow shaft 17 is integrally formed at the lower part of the lid body 20.

The upper hollow shaft 16 of the above dehydration shaft 14
is supported by the upper case 8 via a bearing 21, and the lower hollow shaft 17 is supported by the lower case 9 via a bearing 22. The brake drum 18 also serves as a casing for the speed reduction device 11 described above, and a well-known planetary gear mechanism 23 for speed reduction is provided inside. A drive shaft 24, which is an input shaft of the planetary gear mechanism 23, receives rotational force from the motor 10 via a belt transmission mechanism 25 and is rotated. A stirring shaft 26, which is an output shaft of the planetary gear mechanism 23, is connected and supported by the stirring body 5. Thereby, the drive shaft 24 is driven to rotate in forward and reverse directions by the motor 10 to drive the stirring body 5. Note that the belt transmission mechanism 25 includes a belt 27 and a drive shaft 2.
4 and a pulley 29 attached to the lower end of the rotating shaft of the motor 10.

Now, the clutch mechanism 12 includes a clutch pawl 30 which is a drive side locking part, and a movable clutch pawl 31 which is a tank shaft side locking part which is connected to and non-continuously connected to this clutch pawl 30.
It is composed of. The clutch pawl 30 is integrally formed on the upper surface of the pulley 28, and as shown in FIG.
It has 0a. Furthermore, the movable clutch pawl 31 has a substantially cylindrical shape, and is fitted into the lower end portion of the lower hollow shaft 17.

In this case, a key groove 17a is formed in the axial direction on the outer periphery of the lower end of the lower hollow shaft 17, as shown in FIG. The formed convex portion 31a is fitted. Thereby, the lower hollow shaft 17 and the movable clutch pawl 31 are rotated together, and the movable clutch pawl 31 is configured to be slidable in the vertical direction with respect to the lower hollow shaft 17.

The lower surface of the movable clutch pawl 31 has a large number of teeth 3 that mesh with the teeth 30a of the clutch pawl 30.
1b are arranged in a circle and protrude downward. An engagement groove 31 is provided at an intermediate portion of the outer circumference of the movable clutch pawl 31.
c is formed, and one end of the clutch lever 32 is engaged with this engagement groove 31c. Further, on the upper surface of the movable clutch pawl 31, a large number of engaging pawls 31d, which are engaging portions, are arranged in a circular shape and protrude upward. As shown in FIG. 3, this engaging claw 31d has an inclined surface 31e that is inclined downward in the direction of arrow A.

Further, on the lower surface of the lower case 9 mentioned above, a large number of claw portions 9a that engage with the engagement claws 31d are arranged in a circular shape and protrude downward. This claw portion 9a constitutes an engaged portion, and when the engaging claw 31d engages with the claw portion 9a, the dewatering shaft 14, that is, the rotating tank 4, is prevented from rotating. As shown in FIG. 3, the claw portion 9a has an inclined surface 9b that is inclined downward in the direction opposite to arrow A.
have.

The clutch lever 32 described above is shown in FIG.
As shown in FIG. 2, the middle portion thereof is rotatably supported by a support portion 33 fixed to the lower case 9. As shown in FIG. A coil spring 34 is provided between the upper surface of the other end of the clutch lever 32 and the support portion 33, and the clutch lever 32 is biased in the direction of arrow B by the coil spring 34. Further, a leaf spring 35 for preventing locking of the winding motor, which will be described later, is provided on the lower surface of the other end of the clutch lever 32. The spring force of this leaf spring 35 is set to be greater than the spring force of the coil spring 34. A wire 36 attached to the right end of the leaf spring 35 passes through the other end of the clutch lever 32, inserts the coil spring 34, and extends further upward.

The wire 36 is connected to a winding device (
(not shown). The winding device includes a winding motor, a speed reducer, an output shaft of this speed reducer, and a wire 36.
It consists of an electromagnetic clutch, etc. that connects the winding shaft with the winding shaft. When the winding device is driven, the winding motor is energized to wind the wire 36, and when a predetermined amount of wire has been wound, the winding motor is cut off and the winding state is maintained by a reduction gear. It has become. When the winding device is stopped, the electromagnetic clutch is de-energized, the winding shaft is free to rotate, and the winding state is released.

Regarding the brake device 13, a brake band 3 for braking the brake drum 18 will be described.
7 is attached to the outer peripheral surface of the brake drum 18. One end of the brake band 37 is connected to a pivot 38 fixed to the lower case 9, and the other end is connected to the brake lever 3, which is rotatably supported on the lower case 9 by the pivot 33.
It is connected to 9. Brake of the above brake band 37
A brake shoe 37a is provided on the surface that contacts the kid drum 18.
is installed. The above-mentioned brake lever 39 is always connected to the brake band 3 by a tension coil spring (not shown) or the like.
7 is rotationally biased in the direction of tightening the brake drum 18. The tightening direction of this brake band 37 is
It is set in the same direction as the rotating direction of the rotary tank 4 during dehydration, and is the direction shown by arrow A in FIG.

The brake lever 39 also includes a wire and a winding device (none of which are shown) that winds up the wire.
The brake band 37 is rotated in the direction in which the brake band 37 is loosened. Note that this winding device has almost the same configuration as the winding device that winds up the wire 36 of the clutch lever 32 described above. That is, when the winding device is driven, the wire is wound up by the winding motor and the wire is moved to the brake lever 3.
9 is rotated in the loosening direction, and this state, that is, the state in which the braking of the brake device 13 is released, is maintained. When the winding device is stopped, the winding of the wire is released, and a spring (not shown) rotates the brake lever 39 in the direction of tightening the winding, so that the brake device 13 is braked. There is.

On the other hand, FIG. 4 is a diagram schematically showing an electrical configuration for driving the motor 10. As shown in FIG. In FIG. 4, the motor 10 is, for example, a brushless DC motor,
It has three-phase windings 10a, 10b, 10c and a rotor 10d made of permanent magnets. In addition, the DC power supply circuit 40
receives a commercial AC power source 41, rectifies it, and provides a DC voltage to a motor drive circuit 42. The motor drive circuit 42 has six switching elements 43. The control circuit 44 controls the windings 10a to 10 of the motor 10 by appropriately turning on and off the switching element 43 of the motor drive circuit 42.
The rotor 10d is rotationally driven by appropriately exciting the rotor c and performing so-called phase switching.

In this case, the control circuit 44 detects the rotational position of the rotor 10d using the position detection circuit 45 and detects the rotational position of the rotor 10d.
By detecting the rotation speed of 0, the rotation speed of the motor 10 can be set to an arbitrary speed. Furthermore, when the overcurrent detection circuit 46 detects an overcurrent flowing through the main circuit, the control circuit 44 cuts off the power to the main circuit and stops the motor 10 . Here, when performing electromagnetic braking after driving the motor 10 to rotate at high speed, the control circuit 44 turns on and off the switching element 43 as appropriate to apply a DC voltage to the windings 10a to 10c of the motor 10 to perform braking. It is designed to perform braking.

Next, the operation of the above configuration will be explained with reference to the flowchart shown in FIG. First, during washing, the movable clutch pawl 31 of the clutch mechanism 12 is positioned upward, and the clutch pawl 30 and the movable clutch pawl 31 are in a disengaged state. As a result, the rotational force transmission from the drive shaft 24 to the lower hollow shaft 17, which is a part of the dehydration shaft 14, is cut off, and only the drive shaft 24 side is rotated by the motor 10.
The stirring body 5 is set in a state in which it can be driven at a rotational speed reduced by the speed reduction device 11. At the same time, since the engaging pawl 31d of the movable clutch pawl 31 is engaged with the pawl portion 9a of the lower case 9, rotation of the dewatering shaft 14, that is, the rotating tank 4, in the opposite direction of arrow A is prevented. The brake band 37 of the brake device 13 is tightened to the brake drum 18, and rotation of the dewatering shaft 14, that is, the rotating tank 4, in the direction of arrow A is prevented. In other words, the rotating tank 4 is prevented from rotating in both forward and reverse rotation directions. In this state, as shown in FIG. 5, when the power switch is turned on and the washing operation start operation is performed, the washing operation is executed (steps S1 and S2).
.

[0029] During execution of this washing operation, the stirring body 5 is in the motor mode.
It is driven in forward and reverse rotation by the motor 10. When the agitator 5 rotates forward and backward, a reverse swirling water flow is generated in the rotating tub 4 and the laundry is washed. Receives rotational force in the opposite direction. On the other hand, the engaging pawl 3 of the movable clutch pawl 31
1d and the claw portion 9a of the lower case 9 and the braking of the brake device 13, the rotating tub 4 is prevented from rotating in both forward and reverse rotation directions, so that the rotating tub 4 does not rotate during washing, that is, rotates simultaneously. This can definitely be prevented.

Now, when the washing operation is completed, dehydration is executed. At the start of this dehydration, a winding device for winding the wire 36 that rotates the clutch lever 32 is driven, and a winding device that winds the wire that rotates the brake lever 39 is also driven (step S3). As a result, the movable clutch pawl 31 slides downward and its teeth 31
b meshes with the tooth portion 30a of the clutch pawl 30. That is, the pulley 28, that is, the drive shaft 24, and the lower hollow shaft 17 are connected in series, and rotational force is transmitted to the dewatering shaft 14. At the same time, the engagement between the engaging claw 31d of the movable clutch claw 31 and the claw portion 9a of the lower case 9 is released, and the brake band 37 becomes loose with respect to the brake drum 18, and the rotating tank 4 is released. It becomes a non-braking state.

Here, the above-mentioned movable clutch pawl 31 slides downward and its tooth portion 31b engages with the tooth portion 3 of the clutch pawl 30.
0a, the lower end of the tooth 31b may come into contact with the upper end of the tooth 30a depending on the positions of the tooth 31b and the tooth 30a, and the tooth 30a may not mesh. In such a case, as the wire 36 is wound up by the winding device, the lower end of the toothed portion 31b hits the upper end of the toothed portion 30a, making it impossible for the clutch lever 32 to rotate. At this time,
Since the leaf spring 35 of the clutch lever 32 is deformed and the wire 36 is wound up by a predetermined amount, the winding motor does not lock.

In this state, the motor 10 is energized and de-energized at minute intervals (steps S4, S5). As a result, the pulley 28 is rotated little by little intermittently, and the toothed portion 31
When the meshing position of the toothed portion 30a and the leaf spring 35 are aligned, the leaf spring 35 is expanded, the clutch lever 32 is rotated in the opposite direction of the arrow B, and the toothed portion 31b is meshed with the toothed portion 30a. in this case,
The intermittent energization of the motor 10 is performed a preset number of times (step S6). motor 1 for this set number of times.
It is set so that if the current is turned off, the tooth portion 30a of the pulley 28 rotates by one or more times.

[0033] Then, the intermittent energization described above is carried out to
1b is fully engaged with the tooth portion 30a, the motor 10
is continuously energized (step S7), and the rotating tank 4 is rotated at high speed to perform dehydration. After rotating the rotating tank 4 at high speed for a set dewatering time, for example, 5 minutes, the rotating tank 4 is braked (step S8). In this case, the motor 10 is DC-braked for a predetermined period of time. That is, the winding 10 of the motor 10
Direct current is applied to a to 10c to brake the rotor 10d. As a result, the braking force of the motor 10 is transmitted to the rotating tub 4 via the drive shaft 24, the clutch mechanism 12, and the dewatering shaft 14, and the rotating tub 4 is braked, thereby stopping the rotating tub 4.

Thereafter, the winding device that winds up the wire 36 that rotates the clutch lever 32 is stopped, and the winding device that winds up the wire that rotates the brake lever 39 is also stopped (step S9). As a result, the clutch lever 32 is rotated in the direction of arrow B by the urging force of the coil spring 34, and the movable clutch pawl 31 is slid upward.
The tooth portion 31b is disengaged from the tooth portion 30a of the clutch pawl 30, and the engagement pawl 31d of the movable clutch pawl 31 is released.
engages with the claw portion 9a of the lower case 9. That is, pulley 2
8, that is, the drive shaft 24 and the lower hollow shaft 17 are not connected, the rotational force is no longer transmitted to the dehydration shaft 14, and the rotation of the rotating tank 4 in the opposite direction of arrow A is prevented. At the same time, the brake band 37 of the brake device 13 is tightened to the brake drum 18, and the rotation of the dewatering shaft 14, that is, the rotating tank 4, in the direction of arrow A is prevented.

Note that when the engaging pawl 31d of the movable clutch pawl 31 engages with the pawl portion 9a of the lower case 9, the engaging pawl 3
A case where the position of 1d and the position of the claw portion 9a are shifted will be described. In this case, as shown in FIG. 3, since the engaging claw 31d has an inclined surface 31e and the claw portion 9a has an inclined surface 9b, the movable clutch claw 31 slides upward.
When the inclined surface 31e of the engagement claw 31d hits the inclined surface 9b of the claw portion 9a, the inclined surface 31e is guided along the inclined surface 9b. Therefore, the movable clutch pawl 31 rotates and slides upward, so that the engaging pawl 31d completely meshes with the pawl portion 9a.

In this case, the rotation of the rotary tub 4 in the direction opposite to the arrow A is restricted by the engagement described above, but the engagement claw 31d and the claw portion 9
In order to facilitate engagement with a, inclined surfaces 31e and 9b are provided.
, it is no longer possible to restrict the rotation of the rotating tank 4 in the direction of the arrow A. Therefore, the rotation of the rotating tank 4 in the direction of the arrow A is restricted by the brake device 13. That is, the rotation of the rotary tank 4 in the direction of arrow A is set in the tightening direction of the brake band 37.

According to this embodiment having such a configuration, when the clutch pawl 30 and the movable clutch pawl 31 of the clutch mechanism 12 are connected in series during dehydration, the dehydration shaft 14 and the drive shaft 24 rotate together. . That is, unlike a conventional spring clutch, the forward rotational driving force and the reverse rotational driving force of the drive shaft 24 are transmitted to the dewatering shaft 14. In this case, when the motor 10 rotates the rotary tank 4 at high speed and then electromagnetically brakes the motor 10 at the end of dehydration, the braking force is transmitted to the rotary tank 4 via the drive shaft 24, clutch mechanism 12, and dewatering shaft 14. As a result, the rotating tank 4 is braked and stopped. Therefore, when braking the rotating tank 4 that rotates at high speed, the motor 10 is only electromagnetically braked, and there is no need to use the band brake of the conventional configuration, so no sliding noise is generated, and the noise is reduced. can. in this case,
Since the motor 10 is only electromagnetically braked and there are no parts that wear out due to sliding, the cost for ensuring sufficient durability can be reduced.

Further, in this embodiment, when the movable clutch pawl 31 of the clutch mechanism 12 is disengaged, the engaging pawl 31d of the movable clutch pawl 31 is connected to the pawl portion 9a of the lower case 9.
Since the rotating tub 4 is prevented from rotating by engaging with the washing machine, it is possible to reliably prevent the rotating tub 4 from rotating together during washing, and it is possible to eliminate the need for parts such as a clutch for preventing reversal. In this case, the rotation of the rotating tank 4 in the direction of arrow A is restricted by
This is done by the brake device 13. However, since this brake device 13 is operated to perform braking while the rotating tank 4 is stopped, the brake shoes 37a of the brake band 37 hardly ever slide. Therefore, since the brake shoes 37a are hardly worn out, it is not necessary to configure the brake device 13 with sufficient durability compared to a brake device having a conventional configuration. In other words, the cost of the brake device 13 can be reduced.

Furthermore, the clutch pawl 30 of the clutch mechanism 12
Since it is integrally formed with the pulley 28 which is a rotating body on the drive shaft 24 side, the number of parts can be reduced and the overall configuration can be simplified.

In the above embodiment, when braking the motor 10, DC braking is performed, but instead, energization to the windings 10a to 10c is switched by a force in the direction opposite to the rotation direction of the rotating tank. It is also possible to adopt a configuration in which control is performed so as to generate.

FIGS. 6 and 7 show a second embodiment of the present invention, in which the same parts as in the first embodiment are given the same reference numerals, explanations thereof will be omitted, and different parts will be explained. In FIG. 6, the motor 47 is disposed below the power control mechanism 48. The rotation shaft of the motor 47 constitutes a drive shaft 49 that is an input shaft of the planetary gear mechanism 23. A frame 50 of the motor 47 is constructed integrally with a lower case 51 of the power control mechanism 48. Below the brake drum 18 in the lower case 51, a drive shaft 49 and a lower hollow shaft 5 are provided.
A partition plate 53 through which No. 2 passes is provided. A claw portion 53a replacing the claw portion 9a is integrally formed on the lower surface of the partition plate 53.

Further, a clutch pawl 55 in place of the clutch pawl 30 is provided on the upper surface of the rotor 54 of the motor 47. Here, the motor 47 is, for example, an induction motor, and includes the above-described frame 50, rotor 54, and frame 50.
It consists of a stator 56 fixed to. Stator 5
6 consists of an iron core 57 and three-phase windings 57a to 57c (see FIG. 7) wound around the iron core 57. The rotor 54 includes an iron core 58 and a squirrel cage conductor 59. The clutch pawl 55 is placed on the upper surface of the end ring 59a of the squirrel cage conductor 59.
are integrally formed.

On the other hand, in FIG. 7 showing the electrical configuration, an inverter circuit 60 has six switching elements 61 and receives a DC voltage from the DC power supply circuit 40.
The windings 57a to 57c are energized and disconnected as appropriate. The control circuit 62 appropriately turns on and off the six switching elements 61 of the inverter circuit 60, thereby controlling the windings 57a to 57c.
A rotating magnetic field is generated by applying phase current to the rotor 5.
It is configured to rotate 4. In this case, by appropriately setting the frequency of the three-phase alternating current, the rotational speed of the rotor 54 can be appropriately set. Note that an encoder (not shown) detects the rotational speed of the rotor 54.
is provided, and the speed of the rotor 54 can be set to an arbitrary speed with high precision based on the speed detection signal from this encoder.

When the motor 47 is to be braked at the end of the dehydration, the control circuit 62 is controlled to apply direct current to the windings 57a to 57c of the motor 47 to perform DC dynamic braking.

According to the second embodiment, it is possible to obtain substantially the same effects as those of the first embodiment. In particular, since the motor 47 is provided below the power control mechanism 48, the motor 47 is placed at the center of the outer bottom of the water tank. Therefore, compared to a configuration in which the motor is eccentrically arranged at the outer bottom of the water tank, the weight balance is better, and abnormal vibrations of the water tank during dewatering can be prevented as much as possible. Further, in the second embodiment, the upper end of the dehydration shaft 14 is supported by the upper case 8 via a bearing 21, and the lower end of the drive shaft 49 is supported by the frame 50 of the motor 47 via a bearing 63. In contrast, in the first embodiment, two bearings 21 and 22 are provided to support the dewatering shaft 14, and two bearings are provided to support the rotating shaft of the motor 10. Therefore, the second embodiment can reduce the number of bearings by half compared to the first embodiment.

Furthermore, in the second embodiment, since the rotating shaft of the motor 47 is also used as the drive shaft 49, the belt transmission mechanism 25 in the first embodiment can be omitted, and compared to the first embodiment, The number of parts can be reduced and the overall configuration can be made smaller. Therefore, significant cost reduction is possible.

[0047] In each of the above embodiments, the rotating tank 4 is
Although the brake device 13 is provided to prevent co-rotation in the direction of arrow A, instead of this, the shape of the engaging claw of the movable clutch claw and the shape of the claw portion of the lower case and the partition plate are changed to The shape of the teeth of the movable clutch pawl is substantially the same as the shape of the teeth of the clutch pawl, and by meshing the engaging pawl with the pawl, forward and reverse rotation of the rotary tank is prevented, and,
A brake device may be unnecessary.

Furthermore, in each of the above embodiments, the drive-side locking portion of the clutch mechanism is constituted by the clutch pawl 30, and the tank shaft side locking portion is constituted by the movable clutch pawl 31, but the invention is not limited to this. Alternatively, both of the locking portions may be constructed from plate materials having large coefficients of friction (provided that the coefficients of friction in both forward and reverse rotational directions are large).

[0049]

[Effects of the Invention] Since the present invention is as explained above, the following effects can be obtained.

In the dewatering/washing machine according to claim 1, the clutch mechanism for transmitting the forward and reverse rotational driving force of the drive shaft to the tub shaft includes a drive-side locking portion provided to rotate integrally with the drive shaft; Since it is composed of a tank shaft side locking part that is provided to rotate integrally with the tank shaft and is connected or not connected to the drive side locking part, when the tank shaft is connected continuously, the forward rotational driving force of the drive shaft and The reverse rotational driving force is transmitted to the tank shaft. Therefore, when the motor is electromagnetically braked at the end of dewatering, the braking force is transmitted to the rotating tank via the drive shaft, clutch mechanism, and tank shaft. As a result, when braking a rotating tank that rotates at high speed, it is not necessary to use a band brake by simply electromagnetically braking the motor, so sliding noise is no longer generated and noise can be reduced. In this case, since the motor is only electromagnetically braked and there are no parts that wear out due to sliding, the cost for ensuring sufficient durability can be reduced.

In the dewatering/washing machine according to claim 2, when the tub shaft side locking portion of the clutch mechanism is disengaged,
By engaging the engaging part of the tank shaft side locking part with the engaged part of the stationary part, the rotating tank is prevented from rotating, so that the rotating tank can be prevented from rotating together during washing. Parts such as a clutch for preventing reversal can be made unnecessary.

In the dewatering/washing machine according to the third aspect of the present invention, the drive-side locking portion of the clutch mechanism is integrally formed with the rotating body on the drive shaft side, so that the number of parts can be reduced and the configuration can be simplified.

[Brief explanation of the drawing]

[Fig. 1] A vertical cross-sectional view of a power control mechanism showing one embodiment of the present invention.

[Figure 2] Overall broken side view

[Fig. 3] Perspective view showing the vicinity of the clutch mechanism

[Figure 4] Electrical configuration diagram

[Figure 5] Flowchart

FIG. 6 is a diagram corresponding to FIG. 1 showing a second embodiment of the present invention.

[Figure 7
] Figure 4 equivalent figure

[Explanation of symbols]

4 is a rotating tank, 5 is an agitator, 6, 48 is a power control mechanism, 9
a is a claw part (engaged part), 10 and 47 are motors, 12 is a clutch mechanism, 14 is a dewatering shaft (tank shaft), 24 and 49 are drive shafts, 28 is a pulley (rotating body), 30 and 55 are Clutch pawl (drive side locking part), 31 is a movable clutch pawl (movable side locking part), 31d is an engagement pawl (engaging part), and 54 is a rotor (rotating body).

Claims (3)

[Claims] 1. A tank shaft of a rotating tank; a drive shaft that is driven to rotate in forward and reverse directions by a motor and drives an agitator in the rotating tank;
a clutch mechanism that transmits forward and reverse rotational driving force of the drive shaft to the tank shaft; 1. A dehydrating/washing machine comprising a tub shaft side locking part which is provided to rotate integrally with the drive side locking part and which is connected and non-continuously connected to the drive side locking part. 2. When the engaging portion provided on the tank shaft side locking portion of the clutch mechanism and the tank shaft side locking portion provided at the stationary portion are disengaged, the engaging portion is engaged. 2. The dehydrating and washing machine according to claim 1, further comprising an engaged portion that locks the rotation of the rotating tub. 3. The dehydrating and washing machine according to claim 1, wherein the drive-side locking portion of the clutch mechanism is integrally formed with the rotating body on the drive shaft side.