JP2731382B2 - Washing machine drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving device for a washing machine, and more particularly, to a driving device for transmitting a driving force of a driving motor only to a stirring blade at the time of washing, and selectively rotating the motor at the time of dehydration. The present invention relates to a driving device of a washing machine that is transmitted to a stirring blade and a dewatering tub.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 54-137861 is known as an example of a motor-directed stirring type washing machine.

In FIG. 1 disclosed in the above publication, reference numeral 1 is a main body, 2 is an outer tub, and 3 is a dehydrating tub of a washing machine (hereinafter, referred to as a dehydrating tub).
The inner tub 3 is fixed to one end of the dehydrating shaft 4. Reference numeral 5 denotes a stirring blade for stirring the clothes in the inner tub 3. The stirring blade 5 is attached to one end of a washing shaft 6, and the washing shaft 6 and the dehydrating shaft 4 are coaxially configured. ing.

On the other hand, reference numeral 7 designates a bearing for supporting the washing shaft 6 and the dehydrating shaft 4 and a clutch mechanism internally provided with a clutch (not shown) for switching between washing and dehydrating. The washing shaft 6 and the dehydrating shaft 4 are connected to a rotor shaft 10 fixed to a rotor 9 constituting a linear motor 8. Reference numeral 11 denotes a stator, and the stator 11 and the rotor 9 constitute a linear motor 8.

[0005] Reference numeral 12 denotes a plurality of opening / closing mechanisms fixed to the rotor shaft 10, and includes opening / closing permanent magnets 12a and 12a.
b is used. Further, the plurality of opening / closing mechanisms 12 include the stirrer 5.
The switching element 13 which is arranged so as to have a different polarity at a position corresponding to the swing angle of the rotor 9, that is, an angle corresponding to the rotation angle of the rotor 9, and which is fixed on or near the frame of the linear motor 8. It is provided in the position which opposes.

Reference numeral 14 denotes a rotating machine fixed to the rotor shaft 10, and a ferromagnetic material 15 is fixed near the tip of the rotating machine 14, and the ferromagnetic material 15 is centered on the rotor shaft 10. Perform a circular motion. Reference numeral 16 denotes a plurality of repulsive ferromagnetic materials fixed on or near the frame of the linear motor 8, and uses an electromagnet here.

[0007] The plurality of repulsive ferromagnetic materials 16 are connected to the repulsive ferromagnetic material 16 when the switching element 13 on or near the rotation circumference of the rotatably mounted ferromagnetic material 15 is opened or closed. The body 15 is disposed in the proximity state. Opposing polarities of the repulsive ferromagnetic material 16 and the ferromagnetic material 15 are arranged in the same structure.

On the other hand, reference numeral 17 denotes an anti-vibration mechanism arranged lower than the main body 1 and connected to the outer tub 2.

Next, the operation of the conventional motor-directed stirring type washing machine having the above configuration will be schematically described.

When a predetermined amount of washing water is put into the outer tub 2 and washing conditions are selected from a selector (not shown), appropriate amounts of washing water and detergent supplied from the outside flow into the outer tub 2.
After the end of the water supply, when the linear motor 8 is operated, the rotor shaft 10 of the linear motor 8 is rotated. At this time, when the opening / closing permanent magnet 12b reaches the vicinity of the reed switch 13, the contact of the reed switch 13 is closed, a relay (not shown) is operated, and the motor 8 is reversed after a predetermined time.

When the reed switch 13 is opened and closed, the linear motor 8 rotates in the reverse direction and the ferromagnetic material 1 is rotated.
5 and the repulsive ferromagnetic material 16 come to the maximum.
Also, since the opposite polarities are the same, strong repulsive energy due to magnetic force is stored between the two, and the rotation of the rotor shaft 10 of the linear motor 8 is braked and stored when the reverse rotation is started. The repulsive energy is applied to the linear motor 8 as a starting torque.

On the other hand, since the reed switch uses a magnetic support type, the reed switch keeps a close state of the opening / closing permanent magnets having different polarities, and the linear motor 8 keeps rotating clockwise. Next, when a different pole approaches the reed switch 13, the contact of the reed switch 13 is opened, and a relay contact (not shown) is set to N.P. Instead of the C control, the linear motor 8 reverses.

At this time, as described above, magnetic repulsion energy occurs due to the approach of the ferromagnetic material 15 and the repulsion ferromagnetic material 16, and the effect of energy on the rotation of the linear motor 8 and the effect of increasing the torque at the time of reversal start are obtained. Can be

Next, in the case of the dehydration process, the linear motor 8
Rotates in one direction regardless of the opening and closing movements of the reed switch 13 and does not lose its function as a repulsion magnet.
As the ferromagnetic body 15 approaches, normal dehydration is performed without generating magnet repulsion energy.

[0015]

However, the above-mentioned conventional washing machine does not generate magnetic force when switching the direction of the rotational force of the motor. However, there is a disadvantage that noise and vibration are generated during washing and dehydration.

[0016]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned various problems, and an object of the present invention is to directly connect a drive motor to a center line of a drive shaft to reduce noise and noise caused by operation. An object of the present invention is to provide a driving device for a washing machine capable of minimizing generation of vibration. The driving device for a washing machine according to the present invention has a problem that severe noise and vibration are generated during washing and dehydration by mounting a linear motor (drive motor) at an eccentric position from the center of a rotor shaft in a conventional washing machine. Is to try to solve.

[0017]

SUMMARY OF THE INVENTION In order to achieve the above object, a driving apparatus for a washing machine according to the present invention comprises a driving shaft mounted on the same center line of a selectively rotating stirring blade and a dewatering tub. And a lower drum rotatably coupled to the outer peripheral surface of the drive shaft via a bearing, integrally coupled with the lower drum, and a plurality of gears provided inside thereof at an upper end thereof. An upper drum having a plurality of insertion grooves, a stirring shaft coupled to or releasably connected to a driving shaft of the driving means, and having a stirring blade at its upper end which is moved up or down by washing water; In order to reduce the rotational force transmitted to the shaft, one side is meshed with the drive shaft, and the other side is selectively equipped with a plurality of reduction gears meshed with the inner peripheral surface of the upper drum, as well as a dewatering tank and stirring blades. Will be joined or released A lower clutch plate that is fixed to the dewatering tank, characterized in that it consists of fixed to the stirring shaft and the upper clutch plate.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 2 is a sectional view of a driving device for a washing machine according to an embodiment of the present invention.
In FIG. 2, reference numeral 50 denotes a washing tub, and a drive motor 51 is mounted at the center of the bottom of the washing tub 50.
The drive motor 51 has a drive shaft 52 having a concave groove 52a formed at the center thereof. Further, the drive motor 5
At 1, a central portion of the washing tub 50 (i.e., a central portion of the side surface of the drive motor 51) is fastened with a fastening bolt 53 at a predetermined distance from the bottom surface. In the washing tub 50, a dehydration tub 54 and a stirring blade 55, which are selectively rotated by the operation of a drive motor 51, are rotatably connected to a center line of a drive shaft 52.

A buoyancy portion 55a is formed on the bottom surface of the agitating blade 55 so as to be lifted by the washing water supplied into the washing tub 50, whereby the agitating blade 55 moves up and down as the washing water is supplied or drained. Be moved.

As shown in FIG. 2, a lower drum 57 is rotatably connected to the outer peripheral surface of the drive shaft 52 via a bearing 56a. And an upper drum 58 having a plurality of insertion grooves 58b formed at the upper end. The upper drum 58 has a guide member 59 fixed to the bottom of the washing tub 50 with a bearing 56b interposed therebetween.
Is rotatably coupled to a lower inner surface of the lower part.

Further, on the upper shaft of the driving shaft 52, a stirring shaft 60 having an insertion portion 60a inserted or detached into the concave groove portion 52a at a lower end is provided upright. A stirring blade 55 is fastened to the upper end by a screw 61d, and rotatably extends through the center of the dewatering tub 54 and the washing tub 50. A gear 60b is formed below the stirring shaft 60. ing.

On the other hand, a plurality of reduction gears 61 mesh with the upper end of the drive shaft 52, and an internal gear 58a formed on the inner surface of the upper drum 58 meshes with the outside of the reduction gear 61. On the upper side of the reduction gear 61, a connector 62 meshed with the gear 60b of the stirring shaft 60 is connected.

Further, at the center of the stirring shaft 60, as shown in FIG. 3, a support rod 63 is fixedly mounted on the rotating side so as to be inserted into or removed from the insertion groove 58b of the upper drum 58. A dewatering shaft 64 is fixedly provided on the bottom surface of 54.

On the lower outer peripheral surface of the dehydrating shaft 64, a stopper member 65 which slides on the inner peripheral surface of the guide member 59 to restrain or release the rotation of the dehydrating shaft 64 (see FIG. 4).
Are combined.

The inner peripheral surface of the stopper member 65, the outer peripheral surface of the dehydrating shaft 64, the outer peripheral surface of the stopper member 65, and the inner peripheral surface of the guide member 59 are slid and moved up and down as the stirring blade 55 rises or descends. As shown in FIG. 4, serrations 65a and 65b are formed on the inner and outer peripheral surfaces, and the serrations 65a and 65b are locked by the dehydrating shaft 64 and the guide member 59, and are slidable up and down. It goes without saying that lines can be formed.

Further, the dehydrating tub 54 keeps the stopped state when the stopper member 65 is locked with the dehydrating shaft 64 and the guide member 59, and the stopper member 65 is lowered so that the dehydrating shaft 64 is lowered. When it is released from the locked state, it becomes rotatable.

On the other hand, on the upper side of the dewatering tank 54, a lower clutch plate 66 having a plurality of connecting protrusions 66a protruding is fixedly mounted. The connecting protrusions 66a of the lower clutch plate 66 are inserted into the stirring shaft 60. A plurality of locking grooves 67 are detached.
The upper clutch plate 67 is fixedly formed by forming a.

The upper clutch plate 67 is fixed to the stirring shaft 60, but is not limited to this. It goes without saying that it can be formed on the bottom surface of the stirring blade 55, for example.

The upper and lower clutch plates 67 and 66 include:
Although the plurality of coupling protrusions 66a and the engaging grooves 67a are formed so as to face each other, for example, the respective gear-shaped protrusions may be formed so as to face each other so as to be connectable or separable.

The groove 52a of the drive shaft 52 and the stirring shaft 60 are preferably formed in a polygon, for example, a triangle or a quadrangle so as to be integrally rotatable when they are connected to each other.

In the figure, reference numerals 68a and 68b denote packings which are tightly inserted between the dewatering tub 54 and the agitating shaft and between the washing tub 50 and the dewatering shaft 64 to prevent leakage of washing water. Reference numeral 59c denotes the guide member 59 and the stirring shaft 6.
0, bearings 69a, 69b, 6
9c is the stirring shaft 60, the dehydrating shaft 64 and the upper drum 5;
8 shows a bush inserted between the two.

The operation and effect of the washing machine driving device according to the embodiment of the present invention configured as described above will be described below. First, at the time of washing, when a proper amount of washing water is supplied into the washing tub 50, as shown in FIG. 2, the stirring blade 55 is raised by the buoyancy acting portion 55a formed on the bottom surface of the stirring blade 55, and the stirring shaft is moved. The drive shaft 52 and the stirring shaft 60 are detached by the rise of 60.

Next, when the drive motor 51 is reversed left and right, the rotational force is reduced by the drive shaft 52 via the reduction gear 61 and the connector 62 and then transmitted to the stirring shaft 60, so that the stirring blade 55 is horizontally reversed. While washing, a stream of water is generated in the washing water to wash the clothes.

At this time, in the dewatering tub 54, the outer surface of the dewatering shaft 64, the inner surface of the guide member 59, and the stopper member 65 locked by the serration members 65a, 65b restrain the rotation of the dewatering shaft 64. As a result, the stopped state is maintained.

On the other hand, after the washing process, when the washing water is distributed and rinsed several times, the dewatering process starts.

In the dewatering process, as shown in FIG. 5, since the buoyancy of the washing water does not act on the buoyancy section 55a due to the distribution of the washing water in the washing tub 50, the agitating blade 55 descends, thereby causing the dehydrating shaft 64 to descend. Insertion part 6 formed at lower end
The upper clutch 0a is inserted into the concave groove portion 52a formed at the upper end of the drive shaft 52, and the support rod 63 is lowered to be inserted into the insertion groove 58b formed above the upper drum 58 and lowered. The engaging groove 67 a of the plate 67 is coupled to the coupling protrusion 66 a of the lower clutch plate 66.

Further, the stopper member 65 locked on the guide member 59 and the dehydrating shaft 64 becomes a support rod 63.
And the serration portion 65b
Is locked only to the inner surface of the guide member 59, so that the dehydrating shaft 64 is rotatable.

At this time, the rotational force generated by the operation of the drive motor 51 is transmitted to the stirring shaft 60 through the drive shaft 52, whereby the stirring blade 55 is rotated. At the same time, the support rod 63 is inserted into the insertion groove 58b. The stirring shaft 60 and the upper drum 58 and the lower drum 57 rotate integrally.

Further, the upper and lower clutches 6
The stirring shaft 60 and the dewatering tub 54 are integrally rotated by the engagement of the locking grooves 67a and the coupling protrusions 66a with the 7, 66, thereby performing the dewatering process.

At this time, the rotation of the dewatering shaft 64 causes the stopper member 65 to be detached from the outer peripheral surface by the rotation of the stopper member 65 and becomes rotatable, and the dewatering shaft 64 is not restrained. Are integrally rotated, the rotation of the dewatering tank 54 and the stirring blade 55 enables a dehydration process.

Therefore, in the driving device for a washing machine according to one embodiment of the present invention, the stirring shaft connected to the center line of the dewatering tub and the stirring blade and the driving shaft of the driving motor are directly connected to the center line of the stirring shaft. The rotational force of the drive motor is selectively transmitted to the stirring blades and the dewatering tank, so that noise and vibration generated by the operation are minimized, and not only the quiet operation is enabled, but also the structure is simplified. Easy to assemble,
This has the advantage that the manufacturing cost can be significantly reduced.

6 and 7 are cross-sectional views illustrating a driving device of a washing machine according to another embodiment of the present invention. A plurality of connecting projections 55b project downward from the bottom surface of the stirring blade 55. A plurality of engaging grooves 54a into which the coupling protrusions 55b are inserted or detached are formed on the bottom surface of the dewatering tank 54. Further, a fixed plate 70 is mounted on the bottom surface of the washing tub 50, and a housing 71 is integrally fastened to the fixed plate 70. On the other hand, in the housing 71, a drive motor 51 including a rotor 51a and a stator 51b is provided.

The rotor 51a has a groove 52a at its upper end.
A stirring shaft 60 having an insertion portion 52a inserted or detached into or from the concave groove portion 52a is rotatably coupled to the drive shaft 52 formed with the shaft, and is vertically erected on the same line above the drive shaft 52. ing. A reduction gear 61 for reducing the rotational force transmitted from the drive shaft 52 is rotatably connected to the outside of the drive shaft 52 and the stirring shaft 60.

The reduction gear 61 is connected to a large-diameter gear 61a locked to the drive shaft 52, and a stirring shaft 60 formed at a predetermined interval above the large-diameter gear 61a and moved up and down. Small diameter gear 61b selectively meshed with gear 60b
Consists of Further, the large-diameter and small-diameter gears 61a,
The gear 61b is selectively meshed with the gear 60b connected to the stirring shaft 60 and the upper outer peripheral surface of the drive shaft 52, so that the rotation speed transmitted to the stirring blade 55 during washing can be reduced. In FIG. 6, reference numeral 68c indicates a packing tightly inserted between the outer peripheral surface of the stirring shaft 60 and the dewatering tub 54 and the washing tub 50.

Next, the operation and effects of the driving device for a washing machine according to another embodiment of the present invention will be described. First,
When an appropriate amount of washing water is supplied into the washing tub 50, the agitating blades 55 are raised by the buoyancy acting portions 55a formed on the bottom surface, and the agitating shaft 60 is raised to remove the insertion portion 60a from the concave groove portion 52a. By releasing, as shown in FIG.
The rotational force of the drive shaft 52 due to the operation of the rotor 51a is transmitted to the stirring shaft 60 and the stirring blade 55 via the reduction gear 61 to rotate. That is, the rotational force of the drive shaft 52 is applied to the large-diameter gear 61a and the small-diameter gear 61a of the reduction gear 61.
a is transmitted to the gear 60b through the a, and the deceleration is sufficiently performed.
Therefore, the agitating blade 55 performs the washing by generating a water flow in the washing water while reversing left and right.

At this time, the hanging groove 54a and the coupling protrusion 55b are separated from each other by the rising of the stirring blade 55 by the washing water, so that the dewatering tub 54 is kept fixed. On the other hand, after the washing is completed, the rinsing is performed several times, and then dehydration is performed.

In the dewatering process, when the washing water in the washing tub 50 is distributed, the stirring blades 55 and the stirring shaft 60 move downward as shown in FIG. The insertion portion 60a of the stirring shaft 60 is inserted into the bracket, and the rotational force is directly transmitted from the drive shaft 52 to the stirring shaft 60, so that the drive shaft 52 and the stirring shaft 60 rotate integrally. As the stirring shaft 60 moves downward, the stirring blade 55
A plurality of coupling projections 55b projecting from the bottom of the
The stirring blade 55 and the dewatering tub 54 rotate at the same speed to be dewatered by being inserted into the retaining groove 54a formed therein.

At this time, the gear 60b connected to the stirring shaft 60 descends and is no longer meshed with the guide reduction gear 61, so that no deceleration action occurs. Therefore, the other embodiment of the present invention described above can obtain the same operation and effect as those of the above-described embodiment.

[0049]

As described above, the driving apparatus for a washing machine according to each embodiment of the present invention selectively connects the stirring blade and the dewatering tub by directly connecting the drive motor to the center line of the stirring blade and the dewatering tub. By rotating, not only noise and vibrations caused by operation are minimized and quiet operation is possible, but also the structure of the reduction gear and the drive motor is simplified, so that the assembly is simple and the manufacturing cost is reduced. Have the advantages that can be.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of a conventional washing machine, shown in FIGS.
1 is a diagram illustrating a driving device for a washing machine according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating the driving device of the washing machine according to the embodiment;

FIG. 3 is a perspective view of a main part.

FIG. 4 is a perspective view of a main part.

FIG. 5 is a cross-sectional view illustrating an operating state of a driving device according to an embodiment of the present invention, and FIGS. 6 and 7 are views illustrating a driving device of a washing machine according to another embodiment of the present invention.

FIG. 6 is a combined sectional view of a driving device according to another embodiment.

FIG. 7 is a combined sectional view showing an operation state of a driving device according to another embodiment.

[Explanation of symbols]

51: drive motor 52: drive shaft 5
4 ... dehydration tank 55 ... stirring blade 58 ... upper drum 5
8b: insertion groove 60: stirring shaft 60b: gear 6
1: reduction gear 61a: large diameter gear 61b: small diameter gear 6
3. Support rod 64. Dehydrating shaft 65. Stopper member 6.
6 Lower clutch 67 Upper clutch

Claims (12)

(57) [Claims] 1. A drive means having a drive shaft mounted on the same center line of a selectively rotating stirring blade and a dewatering tank, and rotatably connected to an outer peripheral surface of the drive shaft via a bearing. A lower drum, integrally coupled with the lower drum,
An upper drum having a plurality of gears provided inside thereof and having a plurality of insertion grooves formed at an upper end thereof, is coupled to a driving shaft of the driving means so as to be connected or releasable, and has an upper end moved upward or downward by washing water. A stirring shaft provided with stirring blades, a plurality of which are engaged with the drive shaft on one side and the other on the inner peripheral surface of the upper drum to reduce the rotational force transmitted to the stirring shaft. A reduction gear, a lower clutch plate fixed to the dehydration tub so that the dehydration tub and the stirring blade are selectively coupled or released, and an upper clutch plate fixed to the stirring shaft. Drive of the washing machine. 2. A guide member is provided above the upper drum so as to be in close contact with the bottom surface of the washing tub, and a guide member connected below the lower drum via a plurality of bearings is provided. Item 2. A driving device for a washing machine according to item 1. 3. The dewatering shaft is provided outside the stirring shaft through a plurality of bushes.
3. The driving device for a washing machine according to claim 1. 4. The stirring shaft is fixed to a support rod at the center thereof, which is inserted or detached into an insertion groove of an upper drum so that the dewatering tank and the stirring blade are rotated integrally. The driving device for a washing machine according to claim 3, wherein 5. The driving device for a washing machine according to claim 4, wherein the stopper member 65 has serrations formed on inner and outer peripheral surfaces thereof. 6. The dewatering shaft is characterized in that a stopper member for selectively locking or releasing the rotation of the dewatering tub is locked on the outside thereof in accordance with the elevating movement of the stirring shaft. Item 2. A driving device for a washing machine according to item 1. 7. The driving device for a washing machine according to claim 1, wherein the reduction gear is connected to a connector, the upper side of which is engaged with the gear of the stirring shaft. 8. The reduction gear is configured to be meshed with an upper end of a drive shaft and to be meshed with an inner gear formed on an inner surface of an upper drum. Item 2. A driving device for a washing machine according to item 1. 9. A drive means provided at a lower portion inside the housing and having a rotor connected to a stator and a drive shaft, coupled to and separated from the drive shaft, and the upper end thereof is raised or lowered by washing water. A stirring shaft having moving stirring blades, a plurality of which are meshed on one side with the drive shaft and the other side are meshed with the inner peripheral surface of the upper drum in order to reduce the rotational force transmitted to the stirring shaft. It is characterized by comprising a reduction gear, a plurality of coupling projections formed on the stirring blade so that the stirring blade and the dewatering tank are selectively connected or released, and a plurality of locking grooves formed on the dewatering tank. Drive of the washing machine. 10. The driving device for a washing machine according to claim 9, wherein the driving shaft of the driving means has a concave groove formed at an upper end thereof. 11. The driving device for a washing machine according to claim 9, wherein the stirring blade shaft has an insertion portion formed at a tip thereof so as to be insertable into a concave groove portion of the driving shaft. 12. The reduction gear according to claim 9, wherein the reduction gear comprises a large-diameter gear meshed with a drive shaft, and a small-diameter gear selectively meshed with a gear coupled to the stirring shaft.
3. The driving device for a washing machine according to claim 1.