KR20070037122A - Structure of driving unit of drum-type washing machine - Google Patents

Abstract

The present invention relates to a coupling structure between a stator and a tub for a laundry machine of a new structure, which enables the assembly position to be determined accurately and minimizes the risk of breakage of the coupling position between the tub and the stator.

To this end, the present invention has a rear wall surface, the hollow tub-shaped inside; A core portion having a plurality of teeth, a coil wound around each tooth, a first insulator coupled to a rear wall surface of the tub and covering a front surface of the core portion, a second insulator surrounding a rear surface of the core portion, and the first A stator configured to include a plurality of winding ribs on which a portion of the coil is wound while protruding toward the front side of the insulator along a front circumference thereof; A rotor positioned outside the stator and configured to form a motor together with the stator; And, provided between the rear wall of the tub and each of the winding ribs of the stator is provided with a drum washing machine comprising: a fixing portion for fixing the respective winding ribs to the rear wall of the tub.

Drum washing machine, stator, insulator, support protrusion, auxiliary rib

Description

Structure of driving unit of drum-type washing machine

1 is a longitudinal sectional view schematically showing the structure of a conventional direct type washing machine;

Figure 2 is a perspective view of the main incision showing a part of the tub rear wall of the conventional direct-type drum washing machine

Figure 3 is a perspective view showing the stator structure of a conventional direct drum washing machine

Figure 4 is a longitudinal cross-sectional view showing a coupling structure between the tub and the stator of the conventional direct-type drum washing machine

Figure 5 is a longitudinal cross-sectional view showing a coupling structure between the tub and the stator of the direct-type drum washing machine according to the first embodiment of the present invention

Figure 6 is a perspective view showing the tub rear wall structure of the direct-type drum washing machine according to the first embodiment of the present invention

7 is an enlarged view of a portion “A” of FIG. 6.

8 is a perspective view showing a stator structure of a direct drum washing machine according to a first embodiment of the present invention.

9 is a longitudinal sectional view showing a coupling structure between a tub and a stator of a direct drum washing machine according to a second embodiment of the present invention;

10 is a longitudinal sectional view showing a coupling structure between a tub and a stator of a direct drum washing machine according to a third embodiment of the present invention;

Explanation of symbols for main parts of the drawings

200. Tub 210. Step

220. Stepped portion 221. Rib for strength reinforcement

230. Coupling part 231. First fastener

600. Stator 610. Core part

620. First insulator 630. Second insulator

621,631. Second fastener 622,632. projection part

640. Coil 650. Winding Rib

810,820,830. Fixing part 811. Coupling hole

The present invention relates to a drum washing machine, and more particularly to a drive unit of a direct type washing machine.

In general, the drum washing machine has an indirect connection method in which the driving force of the motor is indirectly transmitted to the drum through a belt wound around the motor pulley and the drum pulley, and the rotor of the BLDC motor is directly connected to the drum depending on the driving method. The driving force is divided into direct type.

Here, the driving force of the motor is transmitted directly through the belt wound around the motor pulley and the drum pulley, instead of being directly transmitted to the drum, energy loss occurs in the driving force transmission process, and a lot of noise is generated in the power transmission process.

Therefore, in order to solve such problems of the conventional drum washing machine, the use of a direct drum washing machine using a BLDC motor is increasing.

Referring to Figure 1 briefly look at the structure of the conventional direct-type drum washing machine as follows.

1 is a vertical cross-sectional view illustrating a conventional drum washing machine, in which a tub 2 is installed inside a cabinet 1 and a drum 3 is rotatably installed in the center of the tub 2.

In addition, a motor including a stator 6 and a rotor 5 is installed at the rear side of the tub 2. The stator 6 is fixed to the rear wall of the tub 2, the rotor 5 is axially coupled to the drum 3 through the tub while surrounding the stator (6).

2 is a perspective view illustrating a main part cutaway of a portion of the rear wall of the tub.

At this time, the center of the rear wall portion of the tub (2) is provided with a bearing housing (7) made of metal that can serve as a support for the bearings respectively installed on the outer peripheral surface of both ends of the shaft (4) and the stator (6).

The rear wall portion of the tub 2 is formed of a stepped portion 21 and a non-stepped portion 22, and the center side of the stepped portion 21 provided with the bearing housing 7 is coupled to the stator 6 which will be described later. Coupling portion 23 is formed stepwise. In addition, a plurality of strength reinforcing ribs 22a are formed in the stepped portion 22.

3 is an external perspective view of the stator 6, in which the conventional stator 6 includes an annular core portion 61, an insulator 62, 63, and a hall sensor assembly 64 in which a coil 66 is wound. ) And a tab housing assembly for power connection.

Here, the insulators 62 and 63 include a first insulator 62 and a second insulator 63 formed to surround the top and bottom surfaces of the core part 6 in the drawing. A plurality of protrusions 62a and 63a protruding inwardly are formed on inner surfaces of the insulators 62 and 63 to form fastening holes 62b and 63b.

Each of the fastening holes 62b and 63b is bolted to the coupling part 23 of the rear wall of the tub 2.

In this case, a plurality of positioning protrusions 62c are formed on the protrusion 62a of the upper surface of the first insulator 62 to determine a position when the stator 6 is coupled to the tub 2. A plurality of positioning holes 23a into which the respective positioning projections 62C are inserted are formed in the engaging portion 23 of the rear wall portion of (2).

However, in the series of structures for the coupling between the stator 6 and the tub 2 as described above, each positioning protrusion 62c is formed of a pin with a small diameter, and therefore, due to external impact during assembly or transportation, The problem was that it was broken.

Therefore, the work for fastening the stator 6 to the tub 2 was not easily performed as the respective positioning protrusions 62c were broken.

In particular, the washing machine for directly rotating the drum (3) using a BLDC motor, the stator (6) is mounted directly on the fixed side of the tub 2, as shown in Figure 4 attached, but the weight of only the stator (6) is 1.5 In a large drum washing machine motor having a dehydration rotation speed of about 600 kg or more and a dehydration rotation speed of about 600 to 2,000 RPM, the stator 6 and the vibration of the rotor 5 at high speed rotation and shaking and deformation of the rotor 5 can be There is a problem that the fastening portion between the tub (2) was easily broken.

In addition, in the case of the drum washing machine which fastens the stator 6 to the rear wall of the tub 2 while using the BLDC motor, since the radial direction of the stator 6 is substantially parallel to the ground, vibrations generated during the washing machine operation Due to this, the damage to the fastening portion between the stator 6 and the tub 2 is more severe.

Therefore, in order to prevent breakage in the existing structure, a metal tub supporter (not shown) is essential, but in this case, a process of fastening the tub supporter on the rear wall side of the tub 2 separately in the assembly line must be accompanied. The disadvantage is that the productivity is lowered.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a new type of washing apparatus that is improved so that the coupling positions of the tubs and the stator can be exactly matched with each other.

It is still another object of the present invention to provide a new type of washing apparatus which secures a bearing force on a stator on the rear wall side of a tub so that damage to the fastening portion between the tub and the stator due to external factors such as vibration generated during operation can be prevented. The purpose is to provide.

According to an aspect of the present invention for achieving the above object, a tub having a rear wall surface, the hollow tubular shape; A core portion having a plurality of teeth, a coil wound around each tooth, a first insulator coupled to a rear wall surface of the tub and covering a front surface of the core portion, a second insulator surrounding a rear surface of the core portion, and the first A stator configured to include a plurality of winding ribs on which a portion of the coil is wound while protruding toward the front side of the insulator along a front circumference thereof; A rotor positioned outside the stator and configured to form a motor together with the stator; And, provided between the rear wall of the tub and each of the winding ribs of the stator is provided with a drum washing machine comprising: a fixing portion for fixing the respective winding ribs to the rear wall of the tub.

Hereinafter, with reference to the accompanying Figures 5 to 10 for a preferred embodiment of the present invention will be described in detail.

Figure 5 is a longitudinal sectional view schematically showing the configuration of a direct drum washing machine according to a first embodiment of the present invention.

As can be seen through this, the drum washing machine according to the first embodiment of the present invention comprises a tub 200, the stator 600 and the rotor 5, and the fixing part 810.

Here, the tub 200 is installed inside the cabinet 1 to store wash water, and the drum 3 is rotatably installed therein. In this case, the tub 200 has a rear wall surface for fixing the stator 600.

The tub 200 is formed of a plastic material, and the center of the rear wall is provided with a bearing housing 7 made of metal which can serve as a support for the bearing and fastening the stator 600.

At this time, the bearing housing 7 is made of an aluminum alloy or the like, and when injection molding of the tub 200 made of plastic, it is configured to be integral with the rear wall surface of the tub 200.

In addition, a plurality of stepped portions 210 and non-stepped portions 220 are formed on the rear wall surface of the tub 200 as shown in FIG. 6.

In this case, the stepped portion 210 is a stepped portion so as to protrude outwardly compared to the non-stepped portion 220, and is formed in the radial direction while having a predetermined distance from each other on the rear wall surface of the tub 200. In addition, the stepped portion 220 is a portion that does not protrude as a portion between each of the stepped portions 210.

In particular, the stepped portion 220 has a plate-shaped reinforcing rib 221 having a predetermined thickness is formed in a lattice shape while maintaining a predetermined interval along the radial direction and the circumferential direction of the rear wall of the tub 200.

Each of the strength reinforcing ribs 221 prevents warping when the tub 200 is ejected, and prevents warping and warping of the rear wall of the tub 200 during various operations (for example, during washing or dehydration). Serves to prevent.

In addition, a plurality of coupling parts 230 protruding stepwise toward the rear side of the step portion 210 of the tub 200 in which the bearing housing 7 is provided is further formed, and each coupling The first fastening holes 231 for fastening with the stator 600 are respectively formed in the part 230.

In addition, the stator 600 is fixed to the tub 200, and constitutes a motor together with the rotor 5 which is rotated outside of the tub 200.

The stator 600 includes a core part 610, a coil 640, a pair of insulators 620 and 630, and a plurality of winding ribs 650 as shown in FIG. 8.

The core portion 610 is a portion formed by stacking a steel plate composed of a base (not shown) and the teeth 612 in multiple layers.

At this time, the tooth 612 is a portion formed of a substantially T-shaped when viewed in plan view, the coil 640 is wound around, and the base is a portion forming the body of the core portion 610 to form an approximately ring shape Is formed.

In addition, the pair of insulators 620 and 630 are formed of a material capable of insulating and are formed in substantially the same shape as the core part 610 to surround the front and rear surfaces of the core part 610.

In this case, each of the insulators 620 and 630 is divided into a first insulator 620 surrounding the front surface of the core portion 610 and a second insulator 630 surrounding the rear surface of the core portion 610.

In addition, a plurality of protrusions 622 and 632 having second fastening holes 621 and 631 are formed on the inner circumferential surfaces of the insulators 620 and 630 to correspond to each other. In this case, the second fastening holes 621 and 631 are fastened by the fastening member 101 while being positioned to be matched with the first fastening holes 231 formed in the respective coupling parts 230 of the tub 200.

In addition, each of the winding ribs 650 is a portion of the coil 640 is wound around the front of the first insulator 620 is formed to protrude toward the front side (rear wall surface side of the tub).

In this case, each of the winding ribs 650 is formed between the portion of the front surface of the first insulator 620 where the protrusion 622 is formed and the teeth 612 around which the coil 640 is wound.

In addition, the rotor 5 is located outside the stator 600 and together with the stator 600 constitutes a motor.

At this time, the rotor 5 is formed of an iron plate material, it is configured to transmit a rotational driving force to the drum (3) via the shaft (4).

The shaft 4 is axially coupled to the drum 3 in a state of being supported by the bearing housing 7 through the inner portion of the stator 600 and the rear wall of the tub 200.

In addition, the fixing part 810 is configured such that the winding rib 650 formed on the first insulator 620 may be fixed to the rear wall surface of the tub 200.

The fixing part 810 is provided between the rear wall surface of the tub 200 and each of the winding ribs 650 of the stator 600.

The fixing part 810 will be described in more detail with reference to FIGS. 5 to 7 as follows.

First, the fixing part 810 is formed of a bracket having a front surface coupled to the tub 200 and a rear surface coupled to the winding rib 650 of the first insulator 620.

At this time, the fixing portion 810 is preferably formed in a single body forming an annular (環形) as shown in FIG. Of course, although not shown, the fixing part 810 may be composed of a plurality of pieces separated from each other, and each piece may be arranged to form an annular shape as a whole.

In addition, a plurality of coupling holes 811 into which the respective winding ribs 650 are inserted are formed on the front surface of the fixing part 810. The coupling hole 811 may be a hole passing through the fixing part 810, or may be a groove recessed in a part of the fixing part 810. In the embodiment of the present invention suggests that the coupling hole 811 is a hole.

In addition, the coupling protrusion 240 protrudes toward the fixing part 810 along a portion where the fixing part 810 is coupled to the rear wall of the tub 200. At this time, the coupling protrusion 240 is configured to be inserted into the coupling hole 811 of the fixing portion 810.

That is, each coupling protrusion 240 of the tub 200 is inserted and coupled to the front side of each coupling hole 811 formed in the fixing part 810, and the rear side of each coupling hole 811 is Each of the winding ribs 650 formed on the first insulator 620 of the stator 600 is inserted and coupled to each other.

On the other hand, the above-mentioned fixing part 810 is more preferably formed of a material different from the tub 200, in particular, the fixing part 810 is most preferably formed of a metallic material. This is to prevent deformation of the fixing part 810 even if the fixing part 810 supports the entire load of the stator 600.

Referring to the coupling process between the motor and the tub 200 of the drum washing machine according to the first embodiment of the present invention configured as described above are as follows.

First, the fixing part 810 is coupled to the rear wall surface of the tub 200.

At this time, the plurality of coupling protrusions 240 protruding on the rear wall surface of the tub 200 are coupled to each other by inserting the coupling holes 811 formed in the fixing part 810.

In this state, the stator 600 is placed on each coupling portion 230 formed on the rear wall surface of the tub 200.

At this time, the end of each of the winding ribs 650 formed on the first insulator 620 of the stator 600 is connected to each coupling hole 811 of the fixing part 810 coupled to the rear wall surface of the tub 200. Inserts are combined.

Therefore, the stator 600 is prevented from being flowed such as its rotation while being fixed to the fixing part 810. In addition, the second fastening hole 621 formed in the first insulator 620 of the stator 600 and the second fastening hole 631 formed in the second insulator 60 are coupled portions 230 of the tub 200. Coincides with the first fastening hole 231 formed in FIG.

Thereafter, the coupling between the tub 200 and the stator 600 is completed by fastening the fastening members 101 to the fastening holes 231, 621, 631.

Of course, while the fastening operation using the fastening member 101 is in progress, the stator 600 is provided with a force to rotate along the fastening direction of the fastening member 100. However, since the end of each of the winding ribs 650 formed on the first insulator 620 of the stator 600 is fixed to the fixing part 810, the stator 600 is prevented from rotating.

In addition, when the operation of fixing the stator 600 to the rear wall surface of the tub 200 is completed by the above-described series of processes, one end of the drum 3 and the shaft 4 provided into the tub 200 are coupled to each other. do. Then, the rotor 5 is coupled to the other end of the shaft 4.

In this case, the shaft 4 is supported by the bearing housing 7 provided on the rear wall surface of the tub 200.

As a result, a series of processes for coupling the motor to the tub 200 is completed through the series of processes described above.

On the other hand, Figure 9 is shown a second embodiment of the present invention.

That is, in the second embodiment of the present invention another example of the coupling structure between the fixing part 820 and the tub 200 is presented.

Referring to Figure 9 in more detail with respect to the coupling structure between the fixing portion 820 and the tub 200 according to the second embodiment of the present invention.

 First, the fixing part 820 according to the second embodiment of the present invention is also formed of an annular bracket like the fixing part 810 presented in the first embodiment of the present invention described above.

However, in the fixing part 820 according to the second embodiment of the present invention, a plurality of insertion grooves 821 and a plurality of coupling protrusions 822 are simultaneously formed, and the tub 200 according to the second embodiment of the present invention. A plurality of coupling grooves 250 are formed along the portion of the rear wall of the fixing portion 800 is coupled.

At this time, each of the insertion grooves 821 is formed on the rear of the fixing part 820, the winding rib 650 constituting the stator 600 is inserted and coupled. In addition, the coupling protrusions 822 are formed on the front surface of the fixing part 820 and inserted into each coupling groove 250 formed on the rear wall surface of the tub 200.

Referring to the coupling process between the motor and the tub 200 according to the second embodiment of the present invention configured as described above are as follows.

First, the fixing part 800 is coupled to the rear wall of the tub 200.

This is coupled to each other by inserting a plurality of coupling protrusions 822 protruding on the rear surface of the fixing part 800 into each coupling groove 250 formed on the rear wall surface of the tub 200.

In this state, the stator 600 is placed on each coupling portion 230 formed on the rear wall surface of the tub 200.

At this time, the end of each winding rib 650 formed in the first insulator 620 of the stator 600 is inserted into each insertion groove 821 of the fixing part 820 coupled to the rear wall surface of the tub 200. Inserts are combined.

Therefore, the stator 600 is prevented from flowing, such as its rotation, while being fixed to the fixing part 800. In addition, the second fastening hole 621 formed in the first insulator 620 of the stator 600 and the second fastening hole 631 formed in the second insulator 630 are coupled portions 230 of the tub 200. Coincides with the first fastening hole 231 formed in FIG.

Thereafter, the fastening member 101 is fastened to each of the fastening holes 231, 621, 631 matched with each other to complete the coupling between the tub 200 and the stator 600.

Of course, while the fastening operation using the fastening member 101 is in progress, the stator 600 is provided with a force to be rotated along the fastening direction of the fastening member 101, but the first insulator of the stator 600 is provided. Since the end of each of the winding ribs 650 formed in the 620 is fixed to the fixing portion 820, its rotation is prevented.

In addition, when the operation of fixing the stator 600 to the rear wall surface of the tub 200 is completed by the above-described series of processes, one end of the drum 3 and the shaft 4 provided into the tub 200 are coupled to each other. do. Then, the rotor 5 is coupled to the other end of the shaft 4.

In this case, the shaft 4 is supported by the bearing housing 7 provided on the rear wall surface of the tub 200.

As a result, a series of processes for coupling the motor to the tub 200 is completed through the series of processes described above.

On the other hand, Figure 10 is shown a third embodiment of the present invention.

That is, in the third embodiment of the present invention, the fixing part is manufactured separately from the tub 200 and is not coupled to the tub 200, but the fixing part is formed integrally with the tub 200.

This is to prevent an increase in manufacturing time and waste of manpower which may be caused by the operation of coupling the fixing part to the tub 200.

At this time, the fixing part 830 according to the third embodiment of the present invention is also formed in an annular shape like the fixing part 810 presented in the first embodiment of the present invention described above. In addition, a plurality of coupling holes 831 are formed on the surface of the fixing part 830. Each of the coupling holes 831 is inserted and coupled to each winding rib 650 of the stator 600.

In addition, the fixing part 830 is more preferably formed of a different material from the tub 200, and the reason for this is the same as in the first embodiment of the present invention described above.

In particular, the fixing part 830 is more preferably insert injection into the rear wall surface of the tub 200 during the manufacturing process of the tub 200. This is because the fixing part 800 is formed of a material different from the tub 200 as described above. Of course, if the fixing part 800 is formed of the same material as the tub 200, the shape of the fixing part 800 is additionally added to a mold for forming the tub 200 when the tub 200 is ejected. It is preferable to inject once after forming.

At this time, it is preferable that the fixing part 830 is formed to be thick enough so that each of the winding ribs 650 can be inserted into each coupling hole 831 formed on the surface thereof.

Therefore, even though the fixing part 830 inserts into the rear wall of the tub 200, a part of the fixing part 830 is recessed in the rear wall of the tub 200, and the other part is rearward from the rear wall of the tub 200. Most preferably, it is configured to protrude to the side.

Of course, the fixing part 830 may not be formed thick. That is, the insert 830 may be injected to insert the entire fixing part 830 into the rear wall of the tub 200. In this case, the length of each winding rib 650 formed in the first insulator 620 of the stator 600 may be formed long enough to be inserted into each coupling hole 831 of the fixing part 830.

On the other hand, the present invention is not limited to each embodiment described above, it is a matter of course that changes in dimensions, shapes, materials can be made without departing from the scope of the technical idea of the present invention.

For example, although not shown, the fixing parts 810, 820, and 830 may be integrally formed with each of the winding ribs 650 formed on the first insulator 620 of the stator 600.

As described above, the drum washing machine according to the present invention has various effects as follows by further providing a separate fixing part to assist the fixing force with the stator fixed to the rear wall of the tub.

First, in the process of coupling the stator to the rear wall surface of the tub has the effect that the position of the stator can be accurately determined.

Second, even if vibration occurs during washing, since each winding rib of the first insulator constituting the stator is fixed to the fixing part, damage to the fastening portion between the stator and the tub can be prevented.

Claims (13)

A tub having a rear wall surface and a hollow cylindrical shape; A core portion having a plurality of teeth, a coil wound around each tooth, a first insulator coupled to a rear wall surface of the tub and covering a front surface of the core portion, a second insulator surrounding a rear surface of the core portion, and the first A stator configured to include a plurality of winding ribs on which a portion of the coil is wound while protruding toward the front side of the insulator along a front circumference thereof; A rotor positioned outside the stator and configured to form a motor together with the stator; And, And a fixing part provided between the rear wall surface of the tub and each of the winding ribs of the stator to fix the respective winding ribs to the rear wall of the tub. The method of claim 1, The fixing part The front washing machine is coupled to the tub and the rear drum washing machine, characterized in that consisting of a bracket that is coupled to each winding rib. The method according to claim 1 or 2, The fixing part Drum washing machine characterized in that formed in a single body forming an annular (環形). The method according to claim 1 or 2, The fixing part Comprising a plurality of pieces separated from each other, each piece is a drum washing machine, characterized in that formed to be arranged in an annular shape as a whole. The method according to claim 1 or 2, A plurality of coupling protrusions protruding toward the bracket is formed on the rear wall surface of the tub, The fixing portion is provided with a plurality of coupling holes that are coupled to each other by the concavity and each of the winding ribs of the stator is opposite from each other, And the tub and the stator are coupled to each other by the fixing part. The method according to claim 1 or 2, One surface of the fixing portion is formed with a plurality of coupling holes in which the respective winding ribs of the stator is recessed, The other side of the fixing portion is formed with a plurality of engaging projections concave to the rear wall surface of the tub, The rear wall of the tub is formed with a plurality of coupling grooves each recessed projection, And the tub and the stator are coupled to each other by the fixing part. The method according to claim 1 or 2, The fixing part Drum washing machine, characterized in that integrally formed on the rear wall surface of the tub. The method according to claim 1 or 2, The fixing unit and the tub is a drum washing machine, characterized in that formed from different materials. The method according to claim 1 or 2, The fixing part Drum washing machine, characterized in that formed integrally with each winding rib of the stator. A tub having a rear wall surface and a hollow cylindrical shape; A core portion having a plurality of teeth, a coil wound around each of the teeth, a first insulator coupled to the rear wall of the tub and covering the front surface of the core portion, and a second insulator surrounding the rear surface of the core portion; A stator configured to include a plurality of winding ribs, the winding portion of which is part of the coil, protruding toward the front side of the insulator along the front circumference thereof; A rotor positioned outside of the stator and forming a motor together with the stator: A drum washing machine, which is provided at a portion of the rear wall of the tub opposite to a position where the respective winding ribs of the stator are formed, and each of the fixing holes in which each of the winding ribs of the stator is inserted and coupled is formed. The method of claim 10, The fixing part Drum washing machine, characterized in that formed by insert-injecting a bracket separate from the tub to the rear wall surface of the tub. The method according to claim 10 or 11, The fixing part One end thereof is recessed into the rear wall of the tub, and the other end of the fixing part is formed to protrude from the rear wall of the tub to a height high enough to allow the respective winding ribs to be inserted therein. The method of claim 10, Each of the wound ribs drum washing machine, characterized in that formed long enough to be inserted into each coupling hole of the tub.

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