JPH11244576A - Washing machine - Google Patents

Abstract

(57) [Problem] To provide excellent clutch switching reliability, reduce the number of parts, and prevent corotation of a rotating tank. A transmission part (31) of a stirring body drive shaft (30), a transmitted part (16) of a tank drive shaft (15), and a bush (33) have the same outer diameter and are arranged in the axial direction. Clutch 3
Numeral 4 is configured to be movable in the axial direction and not to rotate relatively in the forward rotation direction and the reverse rotation direction with respect to the counterpart shaft, and the transmission unit 31 of the stirring body drive shaft 30 and the tank drive shaft 15
Of the tank drive shaft 15 at the lower position.
And the bush 33 are connected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine having a clutch for connecting and disconnecting a rotary tub and a stirring body.

[0002]

Conventionally, a washing machine has been provided with a clutch device for switching between transmitting the rotational force of a motor to an agitator and transmitting it to both an agitator and a rotary tub. . This clutch device has various configurations, one of which is provided so that the rotating tank itself can be moved up and down by the buoyancy of water with respect to the stirring body drive shaft connected to the stirring body. There is one in which a provided clutch is fixed to and separated from a stirrer drive shaft. However, in this case, it is difficult to fix the rotating tank to the agitator drive shaft, and there is a problem in reliability of clutch switching.

[0003] As a washing machine equipped with another type of clutch,
The applicant has filed Japanese Patent Application No. 7-165732 (known). In this washing machine, the clutch device includes, as constituent components, a holder mounted on the stirrer drive shaft, a lever rotatably provided on the holder, and a toggle for applying a spring force between the lever and the holder. It has a spring and the like. In this case, the reliability of clutch switching is excellent, but the number of parts is slightly large.

[0004] The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide an excellent clutch switching reliability,
Another object of the present invention is to provide a washing machine provided with a clutch having a small number of parts.

[0005]

According to a first aspect of the present invention, there is provided a tank drive shaft having a rotary tank, a stirring member disposed in the rotary tank, and a part to be transmitted and connected to the rotary tank. A stirrer drive shaft connected to the stirrer and having a transmission portion arranged concentrically with the tank drive shaft and having the same outer diameter as the transmitted portion of the tank drive shaft and arranged in the axial direction; A non-rotating member having an outer peripheral surface formed to have the same outer diameter as the transmitted portion and the transmitting portion and arranged in the axial direction with the transmitted portion; a motor for rotating the agitator driving shaft; The agitator is configured to be movable in the axial direction with respect to the body drive shaft and the tank drive shaft, and to be relatively non-rotatable in the forward rotation direction and the reverse rotation direction with respect to the counterpart shaft. The shaft transmission part and the transmission part of the tank drive shaft are connected to each other, and the other end of the shaft drive shaft is Having features and clutch for connecting the non-rotating member and reaches section, where comprising a clutch operation mechanism for moving the clutch in the axial direction.

In this configuration, the clutch is configured to be movable in the axial direction with respect to the agitator drive shaft and the tank drive shaft, and to be relatively non-rotatable in the forward and reverse rotation directions with respect to the mating shaft. Since the clutch is moved by the clutch operating mechanism, the number of parts is small, and unlike the configuration that utilizes the buoyancy of water, the clutch operating mechanism rotates the agitator drive shaft to the tank drive shaft. Connection and release of force transmission are reliably performed, and the reliability of clutch switching is improved.

In addition, since the clutch connects the non-rotating member and the transmitted portion of the tub drive shaft at the other position in the axial direction, the rotary tub is fixed in a non-rotatable normal state. In the washing operation in which the agitator is driven to rotate via the drive shaft, the rotating tank can be prevented from rotating together. In addition, the configuration for preventing co-rotation can be simplified.

[0008] The invention of claim 2 is characterized in that the non-rotating member is constituted by a cylindrical bush provided at a stationary portion. In this configuration, the configuration of the non-rotating member is simple, that is, the configuration for preventing the rotating tank from rotating together is further simplified. The invention according to claim 3 is characterized in that the stationary portion is constituted by a frame for mounting a motor or the like, and the bush is formed integrally with the frame. In this configuration, the configuration for preventing the rotating tank from rotating together can be further simplified.

The invention according to claim 4 is characterized in that the rotary tank, a stirrer disposed in the rotary tank, a tank drive shaft connected to the rotary tank and having a part to be transmitted, and a stirrer. Concatenated,
A stirrer drive shaft having a transmission portion disposed concentrically with the tank drive shaft and having the same outer diameter as the transmitted portion of the tank drive shaft and arranged in the axial direction; and rotating the stirrer drive shaft. And a motor for causing the stirrer drive shaft and the tank drive shaft to move in the axial direction, and to be relatively non-rotatable in the forward rotation direction and the reverse rotation direction with respect to the other shaft. A clutch that connects the transmitting portion of the agitator drive shaft and the transmitted portion of the tank drive shaft at one position and connects only to the transmitted portion of the tank drive shaft at the other axial position; And a clutch operating mechanism for moving the clutch in the axial direction at the other position.

In this configuration, the clutch is configured to be movable in the axial direction with respect to the agitator driving shaft and the tank driving shaft, and to be relatively non-rotatable in the forward and reverse rotation directions with respect to the mating shaft. Since the clutch is moved by the clutch operating mechanism, the number of parts is small, and unlike the configuration that utilizes the buoyancy of water, the clutch operating mechanism rotates the agitator drive shaft to the tank drive shaft. Connection and release of force transmission are reliably performed, and the reliability of clutch switching is improved.

In addition, when the clutch is at the other position, the clutch is connected only to the tank drive shaft, and the clutch is engaged with the non-rotating portion by the engaging means. For example, even if the rotating tank is rotated forward and backward for the washing operation, the rotating tank does not rotate. In addition, the configuration for preventing co-rotation can be simplified.

The invention according to claim 5 is characterized in that a spring for holding the clutch at the other position in a normal state is provided. When the clutch is at the other position, the clutch is in a clutch state in which only the agitator drive shaft is rotated, that is, a washing clutch mode. This washing clutch mode is held by the above-mentioned spring, and when the operation of the washing machine is terminated or not operating, the clutch is disengaged from the washing clutch mode, that is, the agitator drive shaft and the tub drive shaft are disconnected. As a result, the service life of the clutch is extended.

According to a sixth aspect of the present invention, there is provided a rotary tank, a stirrer disposed in the rotary tank, a tank drive shaft connected to the rotary tank and having a part to be transmitted, and a stirrer. Concatenated,
A stirrer drive shaft having a transmission portion disposed concentrically with the tank drive shaft and having the same outer diameter as the transmitted portion of the tank drive shaft and arranged in the axial direction; A rotating motor, a clutch spring disposed between the transmission part of the stirring body drive shaft and the transmission part of the tank drive shaft, and only the unidirectional rotation of the stirring body drive shaft is transmitted to the transmission part of the tank drive shaft. A clutch for switching between transmitting and not transmitting the bidirectional rotation of the stirring body drive shaft to the tub drive shaft, a clutch operating mechanism for performing a switching operation on the clutch, and preventing co-rotation of the rotary tub during washing; It is characterized by having a counter-rotating mechanism.

In this configuration, the clutch includes a clutch spring disposed between the transmission portion of the stirring member drive shaft and the transmitted portion of the tank drive shaft, and the clutch drives the rotation of the stirring member drive shaft only in one direction. And the case where the rotation of the stirrer drive shaft in both directions is not transmitted to the tank drive shaft is switched, and this clutch is switched by a clutch operating mechanism. In addition, unlike the configuration using the buoyancy of water, the transmission and release of rotational force from the agitator drive shaft to the tank drive shaft are reliably performed and released by the clutch operating mechanism,
The reliability of clutch switching is improved. In addition, since the co-rotation preventing mechanism for preventing co-rotation of the rotating tub at the time of washing is provided, the rotating tub does not co-rotate even if the agitator is rotated, for example, forward or reverse for the washing operation.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. First, FIG.
1 shows an overall configuration of the washing machine, in which an outer tub 2 is elastically supported in an outer box 1 via a plurality of sets (only one set is shown) of elastic suspension mechanisms 3. Inside the outer tub 2, a rotary tub 4 serving as a washing tub and a dewatering tub is provided, and further, inside the rotary tub 4, a stirring member 5 is provided.

The rotary tank 4 has a tank main body 4a having a tapered cylindrical shape that gradually expands upward, an inner cylinder 4b provided inside the tank main body 4a so as to form a pumping gap, and a tank main body 4a. And a balance ring 4c attached to the upper end. When the rotary tub 4 is rotated, the internal water is pumped by a rotary centrifugal force and discharged to the outer tub 2 from a dehydration hole (not shown) in the upper portion of the tank main body 4a.

A tank drive shaft through hole 6 is formed at the bottom of the outer tank 2 and a drain port 7 is formed. The drain port 7 is connected to a drain passage 9 having a drain valve 8. doing.
The drain valve 8 is opened and closed by a switching motor (not shown) via an operation member 8a (see FIG. 1). Further, an auxiliary drain port 7a is formed at the bottom of the outer tank 2, and the auxiliary drain port 7a is connected to the drain passage 9 by bypassing the drain valve 8 via a connecting hose (not shown),
The water discharged from the upper part of the rotary tank 4 into the outer tank 2 by the rotation of the rotary tank 4 is discharged.

As shown in FIG. 1, a frame 10 is attached to the outer bottom of the outer tub 2. This frame 10
It comprises an upper frame portion 10a and a lower frame portion 10b. An upper cylinder portion 11 is formed at the center of the upper frame portion 10a, and a lower cylinder portion is formed at the center of the lower frame portion 10b. 12 are formed. Further, bearings 13 and 14 composed of ball bearings are disposed in the cylindrical portions 11 and 12, and a hollow tank drive shaft 15 is inserted into and supported by the bearings 13 and 14.

A shaft cylinder 16a constituting the transmission portion 16 is attached to the outer periphery of the lower end of the tank drive shaft 15 so as to be able to rotate integrally. In addition, a seal 13 a is fitted to the upper part of the bearing 13 in the cylindrical part 11.

The upper part of the tank drive shaft 15 has a flange 1
A support cylinder 17 having 7a is mounted so as to rotate integrally with the tank drive shaft 15. Further, inside the tank driving shaft 15, a stirring shaft 18 is provided with bearings 18a, 1 made of, for example, metal.
The upper end is projected from the support cylinder 17, and the lower end is projected from the lower end of the tank drive shaft 15. Thus, the rotary tank 4 is attached to the flange portion 17a of the support cylinder 17 so as to rotate integrally, and the stirring body 5 is attached to the upper end of the stirring shaft 18 so as to rotate integrally.

As shown in FIG. 6, a drain cover 19 is attached to the inner bottom of the outer tub 2 so as to communicate from the bottom of the rotary tub 4 to the drain valve 8 at the drain port 7. A drain passage 20 is formed. Therefore, by supplying water into the rotary tub 4 with the drain valve 8 closed, water is stored in the rotary tub 4 from the drain passage 20 and the drain valve 8 is closed.
Is opened, the water in the rotary tank 4 can be drained through the drain passage 20.

A motor 21 configured in a brushless motor type is provided on the frame 10 described above.
That is, as shown in FIG. 1, the stator 22 is mounted on the frame 10 concentrically with the stirring shaft 18. The stator 22 includes a laminated core 23 and windings 24.

On the other hand, the rotor 25 which forms the motor 21 with the stator 22 has a rotor housing 26, a rotor yoke 27, and a rotor magnet 28. At the center of the rotor 25, a boss shaft 29 whose outer diameter is the same as the outer diameter of the transmitted portion 16 of the tank drive shaft 15 is provided.
Is attached to the lower end of the stirring shaft 18 so as to be able to rotate integrally therewith. As a result, the rotor 25 is
It is configured to be directly connected to.

In this case, as shown in FIG. 3, the stirring shaft 18 and the boss shaft 29 constitute a stirring body driving shaft 30. The upper part of the boss shaft 29 corresponds to the transmission part 31 of the stirring body drive shaft 30. Thus, the transmitted portion 16 of the tank drive shaft 15 and the transmitting portion 31 have the same outer diameter and are located side by side in the axial direction.

On the other hand, the lower frame portion 10a which is a stationary portion
A cylindrical bush 33 as a non-rotating member is fixed to the cylindrical portion 12 so as to surround the tank drive shaft 15 in advance. That is, the bush 33 has a substantially horizontal mounting flange portion 33a at the upper end, and the mounting flange portion 33a is fixed to the fixing portion 12a formed at the lower end of the cylindrical portion 12. The outer peripheral surface of the bush 33 is formed to have the same outer diameter as the transmitted portion 16 and the transmitted portion 31 and is arranged in the axial direction with the transmitted portion 16. The bush 33 does not directly contact other rotating components such as the tank drive shaft 15 and the inner ring of the bearing 14.

A clutch 34 is provided at the transmitting portion 31 and the transmitted portion 16. FIG. 1 shows the clutch 34 in a dehydrating clutch mode, and FIG. 2 shows a washing clutch mode. As shown in FIGS. 3, 4 and 5, the clutch 34 has a cylindrical needle holder 35 and an elongated cylindrical needle 36 as a rolling element. That is, the needle holder 35
A plurality of grooves 37 each having a V-shaped cross section are formed in the inner surface thereof in the axial direction, and the needles 36 are disposed in the grooves 37.

When the transmitted portion 16 of the tank driving shaft 15 or the transmitting portion 31 of the agitator driving shaft 30 which is a shaft inserted therethrough attempts to rotate in the direction of arrow H, the needle holder 35 is engaged with the groove 37. Needle 36 is attached to wedge-shaped portion Kh formed on one side between transmission portion 16 and transmission portion 31.
Enters the locked state, and when it is attempted to rotate in the direction of arrow I (the direction opposite to the direction of arrow H), the wedge-shaped portion Ki formed on the other side between the groove 37 and the transmitted portion 16 or the transmitting portion 31 The needle 36 enters into the locked state, so that the needle holder 35 cannot be relatively rotated in the forward rotation direction and the reverse rotation direction with respect to the partner shaft. However, the clutch 34 is movable in the axial direction.

A substantially horizontal flange-shaped outer body 38 is attached to the outer peripheral surface of the needle holder 35 so as to be integrally rotatable therewith. A plunger 40 of an electromagnetic device 39 is mounted on the outer body 38. It is fixed so as to extend in the axial direction (upward). A solenoid 41 that forms an electromagnetic device 39 together with the plunger 40 is disposed on the upper surface of the lower frame portion 10b, and the plunger 40 is connected to the solenoid 41 through a through hole 40a formed in the lower frame portion 10b. It has been inserted. The solenoid 4
A plurality of sets 1 and plungers 40 are provided. On the other hand, a substantially conical coil-shaped spring 42 is disposed between the clutch 34 and the rotor housing 26 of the rotor 25. Thus, the outer body 38, the electromagnet device 39 and the spring 42 constitute a clutch operating mechanism 43.

When the electromagnet device 40 is in a cut-off state, as shown in FIG.
0 is moved to the upper position, and in a normal state, the clutch 34 is held at the other position. In this position, the clutch 34 straddles the transmitted portion 16 of the tank drive shaft 15 and the bush 33 and connects them. Such a clutch embodiment is used for a washing operation.

In the washing operation, the rotor 25 of the motor 21 is rotated forward and backward. In this case, the clutch 34 is
Since the rotor 25 and the stirring body drive shaft 30 are connected (originally connected) and the rotor 25 and the tank drive shaft 15 are separated from each other at the upper position as shown in FIG. The rotation of the stirrer 25 is transmitted to the stirrer drive shaft 30 to rotate the stirrer 5 forward and backward. In this case, the water and the laundry in the rotating tub 4 flow, and thereby the rotating tub 4 tries to rotate in the forward and reverse directions. However, the transmitted portion 16 of the tub drive shaft 15 is a bush 33 which is a rotated member. Because they are connected to each other, they do not rotate together.

On the other hand, from the normal state of FIG.
Is energized, the plunger 40 is moved downward against the spring force of the spring 42, and as a result, the clutch 34 is moved to one of the lower positions as shown in FIG. I have. In this position, the clutch 34
The transmission unit 31 of the agitator drive shaft 30 and the tank drive shaft 15
Are connected over the transmitted portion 16. Such a clutch mode is used for a dehydrating operation.

In the dehydrating operation, the rotor 25 is rotated at a high speed. In this case, the stirrer drive shaft 30 and the tank drive shaft 15
Are connected to each other, the rotation of the rotor 25 is transmitted to both the stirrer drive shaft 30 and the tank drive shaft 15, so that the rotary tank 4 and the stirrer 5 are integrally rotated.

According to the present embodiment, the clutch 3
4 is configured to be movable in the axial direction with respect to the stirrer drive shaft 30 and the tank drive shaft 15 and to be relatively non-rotatable in the forward rotation direction and the reverse rotation direction with respect to the partner shaft. Since the clutch 34 is moved, the number of parts is small, and unlike the structure utilizing the buoyancy of water, the clutch operating mechanism 43 rotates the agitator drive shaft 30 from the agitator drive shaft 30 to the tank drive shaft 15. Transmission and release of transmission are reliably performed, and the reliability of clutch switching is improved.

Further, the clutch 34 is located at the upper position with the transmitted portion 16 of the tank drive shaft 15 and the bush 3 which is a non-rotating member.
3, the rotating tub 4 is fixed in a non-rotatable normal state, and in the washing operation in which the agitator 5 is rotationally driven by the motor 21 via the agitating body driving shaft 30, the rotating tub 4 rotates together. Can be reliably prevented. In addition, the configuration for preventing co-rotation can be simplified. Particularly, in this embodiment, since the non-rotating member is formed of the cylindrical bush, the configuration of the non-rotating member is simple, that is, the configuration for preventing the co-rotation of the rotating tank is further simplified.

Further, in this embodiment, since the spring 42 for holding the clutch 34 in the upper position, that is, the washing clutch mode in which only the agitator drive shaft 30 is rotated in the normal state, the operation of the washing machine is terminated. At the time or during non-operation, the clutch 34 is held in the washing clutch mode, that is, the agitator drive shaft and the tub drive shaft are disconnected, and the service life of the clutch is extended.

FIG. 7 shows a second embodiment of the present invention. This embodiment is different from the first embodiment in that a bush 51 is formed integrally with the lower frame portion 10a.
According to this embodiment, since the bush 33 is formed integrally with the frame 10 for mounting the motor 21 and the like, the configuration can be further simplified.

FIGS. 8 to 10 show a second embodiment of the present invention. In this embodiment, the structure of the rotary tank 4 for preventing co-rotation is different from that of the first embodiment. That is, in this embodiment, the bush 33 is not provided, and the engaging means 60 is attached to the cylindrical portion 12 of the lower frame portion 10a which is a non-rotating portion.
Is attached. At the lower end of the engagement cylinder 61, an engagement portion 62 having an uneven shape is formed. The upper surface of the outer body 38 is provided with the engaging portion 62.
An engaging body 64 having a concave / convex engaged portion 63 is also attached so as to face in the axial direction (vertical direction). In this case, the outer diameter of the tank drive shaft 15 is straight (the cylindrical shaft cylinder 16a is not provided), and the lower end of the tank drive shaft 15 is the transmitted shaft 65. .

The clutch 34 connects the transmitting portion 31 of the agitator driving shaft 30 and the transmitted portion 65 of the tank driving shaft 15 at a lower position (FIG. 8). When the clutch 34 is moved to the upper position (FIG. 9), it is connected only to the transmitted portion 65 of the tank drive shaft 15. In this case, the engaged portion 63 of the engaging body 64 engages with the engaging portion 62 of the engaging cylinder 61, that is, the clutch 34
Is engaged with the non-rotational portion by the engagement means 60.

According to this embodiment, when the clutch 34 is at the upper position, the clutch 34
Is connected only to the tank drive shaft 15 and the clutch 34
Are engaged with the non-rotating part by the engaging means 60, so that the rotary tank 4 is fixed to the non-rotating part through the tank driving shaft 15, the clutch 34 and the engaging means 60. Even if the stirring body 5 is rotated forward and backward for the washing operation, the rotating tank 4 does not rotate together. In addition, the configuration for preventing co-rotation can be simplified.

FIGS. 11 and 12 show a fourth embodiment of the present invention, which is characterized by the structure of the clutch 71. FIG. The clutch 71 has a so-called spring clutch structure. A clutch spring 73 is provided inside a tubular sleeve 72, and one end of the clutch spring 73 is connected to the sleeve 7.
2 is fixed. This clutch spring 73 is
It is wound around the transmission part 31 outer peripheral surface of the stirring body drive shaft 30 and the transmitted part 65 outer peripheral surface of the tank drive shaft 15. Further, the sleeve 72 has a claw portion 72a which engages with a clutch lever 74 corresponding to a clutch operation mechanism provided on the operation member 8a. Is transmitted to the transmitted portion 65 of the tank drive shaft 15 and the case where the forward and reverse bidirectional rotation of the agitator drive shaft 30 is not transmitted to the tank drive shaft 15 due to the disengagement is switched.

A one-way clutch 76 is provided on the upper surface of the lower frame portion 10a via a mounting cylinder 75. The one-way clutch 76 is in sliding contact with the outer peripheral surface of the tank drive shaft 15, and as shown in FIG. 12, a large number of needles 78 are rotatable in a plurality of grooves 77a formed in the outer cylinder 77 in the axial direction. The tank drive shaft 15 is allowed to rotate in the direction of arrow H (this is the direction of spin-drying) in the figure, and the tank drive shaft 15 is allowed to rotate in the direction of arrow I (counter-arrow H direction). If you try to rotate, it will prevent this.

A brake drum 79 is mounted on the outer peripheral surface of the tank drive shaft 15 so as to be integrally rotatable, and a brake shoe 80 is wound around the brake drum 79 in a tightly tightened state. The brake device 81 is configured. The brake drum 79 is normally rotatable integrally with the brake shoe 80, but one end of the operation member 8 is rotatably provided on the frame 10.
When the brake shoe 80 is locked by the locking portion (not shown), the brake shoe 80 is fixed and the brake drum 79 is braked. In this case, the braking device 81 exerts an effective braking force only in one direction. When the tank driving shaft 15 rotates or attempts to rotate in the above-described arrow H direction, the braking device 81 performs effective braking. It can be called. The one-way clutch 76 and the brake device 81 constitute a co-rotation prevention mechanism 82.

During the washing operation, the sleeve 72 is stopped from rotating by engaging the clutch lever 74 with the pawl portion 72a. Thus, a clutch mode in which the forward / reverse rotation of the stirring member drive shaft 30 is not transmitted to the tank drive shaft 15 is obtained. Then, the motor 21 is rotated in the forward and reverse directions to rotate the stirrer drive shaft 30 in the forward and reverse directions. In this case, since the clutch spring 73 is stopped by the rotation stop of the sleeve 72, the agitator driving shaft 30 slips with respect to the clutch spring 73 when rotating in the forward direction and in the reverse direction. Only the drive shaft 30 rotates.

During the washing operation, the water and the laundry in the rotating tub 4 are caused to flow by the forward and reverse rotation of the motor 21. As a result, the rotating tub 4 tries to rotate in the forward and reverse directions. Since the brake device 81 prevents the rotation in the direction of the arrow H (see FIG. 12) and the one-way clutch 76 prevents the rotation in the direction of the arrow I, which is the opposite direction, the rotating tank 4 does not rotate together. .

In the dehydrating operation, the clutch lever 74 is disengaged from the pawl portion 72a, so that the sleeve 72 and thus the clutch spring 73 are free to rotate. Then, the motor 21 is moved in one direction (arrow H direction).
When the clutch spring 73 rotates in the direction of rotation, the rotation direction of the transmission portion 31 of the agitator drive shaft 30 and the tightening direction of the clutch spring 73 match, so that the transmission spring 3
1, the stirring member drive shaft 30 and the tank drive shaft 1
5 are connected and rotate integrally.

In such an embodiment, the clutch 7
1 is provided with a clutch spring 73 disposed between the transmission portion 31 of the agitator drive shaft 30 and the transmitted portion 65 of the tub drive shaft 15, so that only one direction rotation of the agitator drive shaft 30 is applied to the tub drive shaft 15. Transmission to the transmission unit 65 and the stirring body drive shaft 3
It is configured to switch between the case where the forward / reverse rotation of 0 is not transmitted to the tank drive shaft 15 and the structure where the clutch 71 is switched by the clutch lever 74 which is a clutch operating mechanism. Unlike the configuration using the buoyancy of water, the reliability of clutch switching can be improved. In addition, since the co-rotation preventing mechanism 82 for preventing co-rotation of the rotating tub 4 during washing is provided, the rotating tub 4
Can be prevented from rotating together.

[0047]

As apparent from the above description, the present invention has the following effects. According to the first aspect of the present invention, the clutch is configured to be axially movable with respect to the agitator drive shaft and the tank drive shaft, and to be relatively non-rotatable in the forward and reverse rotation directions with respect to the partner shaft. Since the clutch operation mechanism moves the clutch,
The number of parts can be reduced, and the reliability of clutch switching can be improved. Further, since the clutch connects the transmitted part of the tank drive shaft and the non-rotating member in a washing clutch mode, it can rotate during the washing operation. It is possible to reliably prevent the tanks from rotating together. In addition, the configuration for preventing co-rotation can be simplified.

According to the second aspect of the present invention, the non-rotating member is
Since it is composed of the cylindrical bush provided at the stationary portion, the configuration for preventing the co-rotation of the rotating tub can be further simplified. According to the third aspect of the present invention, since the bush is formed integrally with the frame for mounting the motor, the configuration for preventing the co-rotation of the rotating tub can be further simplified.

According to the fourth aspect of the invention, the number of parts can be reduced, the reliability of clutch switching can be improved, and the rotating tub does not rotate in the washing operation. The configuration for prevention is also simple. According to the fifth aspect of the present invention, since the spring for holding the clutch at the other position in the normal state is provided, the service life of the clutch can be extended.

According to the sixth aspect of the present invention, the clutch is provided with a clutch spring disposed between the transmission portion of the agitator drive shaft and the transmitted portion of the tank drive shaft, so that only one-way rotation of the agitator drive shaft is provided. The transmission is performed between the case where the rotation is transmitted to the transmission portion of the tank drive shaft and the case where the bidirectional rotation of the stirring body drive shaft is not transmitted to the tank drive shaft, and the clutch operation mechanism switches the clutch. In addition, the number of parts can be reduced, the reliability of clutch switching can be improved, and the co-rotation preventing mechanism is provided.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a main part in a state of a dehydrating clutch showing a first embodiment of the present invention.

FIG. 2 is a longitudinal side view of a main part in a state of a clutch for washing.

FIG. 3 is a longitudinal sectional side view of a clutch part.

FIG. 4 is a cross-sectional plan view of the clutch.

FIG. 5 is a cross-sectional plan view of the needle part of the clutch.

FIG. 6 is a vertical sectional side view of the washing machine.

FIG. 7 is a view corresponding to FIG. 2, showing a second embodiment of the present invention;

FIG. 8 is a view corresponding to FIG. 1, showing a third embodiment of the present invention.

FIG. 9 is a diagram corresponding to FIG. 2;

FIG. 10 is an exploded perspective view of an engagement unit.

FIG. 11 is a longitudinal sectional side view of a main part showing a fourth embodiment of the present invention.

FIG. 12 is a cross-sectional plan view of the one-way clutch.

[Explanation of symbols]

4 is a rotary tank, 5 is a stirring body, 8a is an operation member, 10 is a frame, 15 is a tank driving shaft, 16 is a transmitted part, 18 is a stirring shaft, 21 is a motor, 22 is a stator, 25 is a rotor,
6 is a rotor housing, 29 is a boss shaft, 30 is a stirrer drive shaft, 31 is a transmission unit, 33 is a bush (non-rotating member),
34 is a clutch, 36 is a needle, 39 is an electromagnetic device, 4
0 is a plunger, 41 is a solenoid, 42 is a spring, 43
Is a clutch operation mechanism, 51 is a bush, 60 is an engagement means, 61 is an engagement cylinder, 62 is an engagement portion, 63 is an engaged portion,
64 is an engagement body, 65 is a transmitted shaft, 71 is a clutch, 73
Denotes a clutch spring, 74 denotes a clutch lever (clutch operating member), 76 denotes a one-way clutch, 81 denotes a brake device, and 82 denotes a co-rotation preventing mechanism.

Claims (6)

[Claims] A rotating tank, a stirrer disposed in the rotating tank, a tank driving shaft connected to the rotating tank and having a part to be transmitted, and a tank driving shaft connected to the stirring body. A stirrer drive shaft having a transmission portion arranged concentrically with the drive shaft and having the same outer diameter as the transmitted portion of the tank drive shaft and arranged in the axial direction; A non-rotating member formed in the same outer diameter as the portion and arranged in the axial direction with the transmitted portion; a motor for rotating the stirring member drive shaft; and a shaft with respect to the stirring member drive shaft and the tank drive shaft. In the direction of rotation and in the direction of rotation in the forward and reverse directions with respect to the counterpart shaft. A transmission part is connected, and a transmission part of the tank drive shaft and the non-rotating member are connected at the other position in the axial direction. And a clutch operating mechanism for moving the clutch in the axial direction. 2. The washing machine according to claim 1, wherein the non-rotating member comprises a cylindrical bush provided at a stationary portion. 3. The washing machine according to claim 2, wherein the stationary portion is constituted by a frame for mounting a motor or the like, and the bush is formed integrally with the frame. A rotating tank, a stirring body disposed in the rotating tank, a tank driving shaft connected to the rotating tank and having a portion to be transmitted, and a tank driving shaft connected to the stirring body. A stirrer drive shaft having a transmission portion arranged concentrically with the drive shaft and having the same outer diameter as the transmitted portion of the tank drive shaft and arranged in the axial direction; and for rotating the stirrer drive shaft. A motor, which is configured to be movable in the axial direction with respect to the agitator drive shaft and the tank drive shaft, and to be relatively non-rotatable in the forward rotation direction and the reverse rotation direction with respect to the other shaft, and one of the axial directions A clutch that connects the transmitting portion of the agitator drive shaft and the transmitted portion of the tank drive shaft at a position and connects only with the transmitted portion of the tank drive shaft at the other axial position; Engaging means for engaging the clutch with the non-rotating portion at the position of Washing machine comprising a clutch operation mechanism for moving the. 5. A spring for holding a clutch at another position in a normal state.
The washing machine as described. 6. A rotary tank, a stirrer disposed in the rotary tank, a tank drive shaft connected to the rotary tank and having a part to be transmitted, and a tank connected to the stirrer, A stirrer drive shaft having a transmission portion arranged concentrically with the drive shaft and having the same outer diameter as the transmitted portion of the tank drive shaft and aligned in the axial direction; and directly rotating the stirrer drive shaft A motor, and a clutch spring disposed between the transmission part of the stirring body drive shaft and the transmission part of the tank drive shaft, and transmits only one-directional rotation of the stirring body drive shaft to the transmission part of the tank drive shaft. A clutch for switching between a case and a case where the bidirectional rotation of the agitator drive shaft is not transmitted to the tub drive shaft, a clutch operating mechanism for causing the clutch to perform a switching operation, and a clutch for preventing corotation of the rotary tub during the washing operation. A washing machine comprising a rotation preventing mechanism.