KR101154982B1 - 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 is a plurality of stepped portion and the non-stepped portion is formed radially on the rear wall surface, the central portion of each stepped portion of the tub is formed with a coupling portion; A core portion having a tooth formed thereon, a coil wound around the tooth, a first insulator coupled to each coupling portion of the tub and covering the front surface of the core portion, a second insulator surrounding the rear surface of the core portion, and the first insulator A stator including a partition rib for partitioning between a part fastened to the tub and a part wound around the coil, and a hall sensor assembly and a power supply tab housing assembly provided at a front circumferential side of the first insulator; A rotor constituting a motor together with the stator; And, it is located on the side of the side bent from the stepped portion of each of the at least one coupling portion constituting the tub and the support protrusion for supporting the inner wall surface of the end of the partition rib when the stator is coupled to A drum washing machine is provided.

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 sectional view showing a coupling structure between the tub and the stator of the direct-type drum washing machine according to an 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 an 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 an embodiment of the present invention;

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

10 is a perspective view showing the tub rear wall structure of a direct drum washing machine according to another 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. Compartment Rib

800. Supporting protrusions 810. Secondary ribs

910. Hall sensor assembly 920. Tap housing assembly

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. It is divided into direct type that transmits driving force.

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 composed 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 may cause damage to the stator 6. 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 supporting force on the 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 plurality of stepped portion and the stepped portion is formed radially on the rear wall surface, the central side portion of the stepped portion, respectively, the tub formed with engaging portions; A core portion having a tooth formed thereon, a coil wound around the tooth, a first insulator coupled to each coupling portion of the tub and covering the front surface of the core portion, a second insulator surrounding the rear surface of the core portion, and the first insulator Compartment ribs for partitioning between the part and the coil winding portion of the front surface, and the hall sensor assembly and the tab housing for power supply provided on the front circumferential side of the first insulator spaced apart from each other by a predetermined interval A stator comprising an assembly; A rotor positioned outside the stator and configured to form a motor together with the stator; And, it is located on the side of the side bent from the stepped portion of each of the at least one coupling portion constituting the tub and the support protrusion for supporting the inner wall surface of the end of the partition rib when the stator is coupled to A drum washing machine is provided.

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 the present invention.

As can be seen through this, the drum washing machine according to the embodiment of the present invention is largely configured to include a tub 200, the stator 600 and the rotor (5), the support protrusion (800).

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 are further formed at a central portion of the stepped portion 210 of the tub 200 where the bearing housing 7 is provided. 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, a compartment rib 650, a hall sensor assembly 910, and the like, as shown in FIG. 8. And a tab housing assembly 920 for power supply.

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, the compartment rib 650 is formed on the front surface of the first insulator 620 (surface opposite to the rear wall surface of the tub) and the portion where the protrusion 622 is formed and the portion of the coil 640 is wound and And to partition between. At this time, the partition rib 650 is formed in an annular shape having a certain height, the height is such that the height does not contact the step portion 210 of the tub (200).

The compartment rib 650 serves to block the flow of water that can penetrate through the coupling portion with the tub 200 in addition to the strength reinforcement of the first insulator 620 to flow to the coil 640 wound portion. Do this.

In addition, the hall sensor assembly 910 is provided at the front circumferential side of the first insulator 620 and is configured to measure a current flowing through the coil 640 of the stator 600.

In addition, the power supply tab housing assembly 920 is configured to supply power to the coil 640 of the stator 600, and is provided at a circumferential side of the first insulator 620 and one end thereof It is coupled to the front circumferential side of the first insulator 620.

In this case, the hall sensor assembly 910 and the power supply tab housing assembly 920 are provided to be spaced apart from each other by a predetermined interval.

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.

The support protrusion 800 is configured to support the inner wall surface of the partition rib 650 formed in the first insulator 620 as shown in FIGS. 5 and 7.

The support protrusion 800 is located on the side of the side bent from the step portion 210 of each side of the coupling portion 230 formed in the tub 200 as shown in Figure 6 and 7 the stator 600 ) Is configured to support the inner wall surface of the end of the partition rib 650 when combined.

In particular, the support protrusion 800 may not be in contact with the front surface of the first insulator 620, but may be in contact with the inner wall surface of the end portion of the partition rib 650 by being located inside the partition rib 650. It is preferable to protrude as much as the height.

At this time, the support protrusion 800 is preferably formed to be integrally formed in the coupling portion when the tub 200 is manufactured.

In addition, the support protrusion 800 is preferably formed in at least two or more portions of the respective coupling portions facing each other, but more preferably formed in all of the coupling portions.

This maximizes the portion of the stator 600 supported by the partition rib 650 by the support protrusion 800 so that the load is concentrated on a local part of the compartment rib 650 or one of the support protrusions 800. This is to prevent.

In particular, the left and right widths of the support protrusions 800 are in contact with any one side of the Hall sensor assembly 910 of the first insulator 620 of the stator 600. That is, the fastening positions between the first fastening holes 231 and the second fastening holes 621 and 631 are formed to coincide with each other.

Of course, the left and right widths of each of the support protrusions 800 are in contact with any one side of the power supply tab housing assembly 920 provided in the first insulator 620 of the stator 600. 231 and the second fastening holes 621 and 631 may be formed to coincide with each other.

In addition, the support protrusion 800 is preferably formed so as to round the same arc as the arc formed by the partition rib 650 of the stator 600.

This is to allow the support protrusion 800 to stably support the compartment rib 650 by allowing the support protrusion 800 and the compartment rib 650 to be in surface contact. Of course, the loads provided by the partition ribs 650 may also be distributed by the shape of the support protrusions 800 so that the breakage of the corresponding portions due to the concentration of loads to the local portions is prevented.

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

First, the stator is placed on each coupling portion 230 formed on the rear wall surface of the tub 200.

In this case, the partition ribs 650 formed on the first insulator 620 of the stator 600 are mounted on the respective support protrusions 800 formed on the coupling portions 230.

Therefore, the stator 600 is supported by the support protrusion 800 to form a state seated in the correct coupling position.

In this state, when the stator 600 is rotated in the clockwise direction, the right side surface of the hall sensor assembly 910 located at the front of the first insulator 620 may be connected to the hall sensor assembly 910 of the support protrusions 800. The left end of the support protrusion 800 positioned between the tab housing assembly 920 for power connection is contacted.

Thus, the first fastening hole 231 formed in the coupling portion 230 of the tub 200 has a second fastening hole 621 and a second insulator 630 formed in the first insulator 620 of the stator 600. Coincides with the second fastening hole 631 formed in

If the stator 600 is rotated counterclockwise in a state in which the stator 600 is seated on the coupling portion 230 of the tub 200, a power connection tab located on the front surface of the first insulator 620. The left side of the housing assembly 920 contacts the right end of the support protrusion 800 positioned between the hall sensor assembly 910 and the power connection tap housing assembly 920 among the support protrusions 800.

Thus, the first fastening hole 231 formed in the coupling portion 230 of the tub 200 has a second fastening hole 621 and a second insulator 630 formed in the first insulator 620 of the stator 600. Coincides with the second fastening hole 631 formed in

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.

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, the present invention is not limited to the above-described embodiment, 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, when the stator 600 of the stepped portion 210 of the tub 200 is coupled as shown in FIGS. 9 and 10, the outer wall surface of the partition rib 650 formed on the first insulator 620 is adjacent to the outer wall surface of the tub 200. An auxiliary rib 810 supporting the outer wall surface of the partition rib 650 may be further provided at a position.

This structure is to ensure that both the inner wall and the outer wall surface of the partition rib 650 can be stably supported. That is, the support protrusion 800 supports the inner wall surface of the partition rib 650, and the auxiliary rib 810 supports the outer wall surface of the partition rib 650 to support the tub 200 by the tub 200. The matching process for joining to the rear wall has the advantage that it can be done more easily.

In addition, even when vibration occurs in the tub 200 and the stator 600 by the rotation of the rotor 5 during the washing machine operation, the support ribs 800 and the auxiliary ribs 810 are divided ribs of the stator 600 ( By supporting the 650 with respect to the entire site, damage to the fastening site between the stator 600 and the tub 200 can be prevented.

As described above, the drum washing machine according to the present invention further includes various supporting protrusions on the rear wall of the tub to have various effects as follows.

First, the drum washing machine of the present invention has an effect that the coupling position of the stator can be more smoothly determined when the stator is assembled by the support protrusion.

In addition, the drum washing machine of the present invention has an effect that damage to the fastening portion between the stator and the tub can be prevented even when vibration is generated during washing by the support protrusion.

Claims (9)

A plurality of stepped portions and non-stepped portions are radially formed on the rear wall surface, and tubs having coupling portions protruding from central portions of the stepped portions, respectively; A core portion having a tooth formed thereon, a coil wound around the tooth, a first insulator coupled to each coupling portion of the tub and covering the front surface of the core portion, a second insulator surrounding the rear surface of the core portion, and the first insulator Compartment ribs for partitioning between the part and the coil winding portion of the front surface, and the hall sensor assembly and the tab housing for power supply provided on the front circumferential side of the first insulator spaced apart from each other by a predetermined interval A stator comprising an assembly; A rotor positioned outside the stator and configured to form a motor together with the stator; And, A support protrusion which is positioned on a surface of a side bent from a stepped portion of at least one coupling portion constituting the tub and supports the inner wall surface of the end of the partition rib when the stator is coupled to the stator; Drum washing machine. The method of claim 1, The support protrusion Drum washing machine, characterized in that formed integrally with the coupling portion. The method of claim 1, The support protrusion When the stator is coupled to the rear wall of the tub, the stator is not in contact with the front surface of the first insulator, but is located inside the compartment rib so as to protrude to a height sufficient to be in surface contact with the inner wall of the end of the compartment rib. Drum washing machine characterized in that. The method of claim 1, The support protrusion And the left and right widths of the drum washing machine are configured to be in contact with one side of the hall sensor assembly provided in the first insulator of the stator so that the fastening positions between the stator and the tub match with each other. The method of claim 1, The support protrusion And the left and right widths of the drum washing machine are determined to be in contact with one side of the power supply tap housing assembly provided in the first insulator of the stator so that the fastening positions between the stator and the tub coincide with each other. The method of claim 1, The support protrusion Drum washing machine, characterized in that each formed at least two of the coupling portion facing each other of the coupling portion. 7. The method according to any one of claims 1 to 6, Each support protrusion Drum washing machine, characterized in that the circular arc formed in the same shape as the partition rib. The method of claim 1, The stepped portion of the tub drum washing machine, characterized in that further provided with an auxiliary support protrusion for wrapping the outer wall surface of the partition rib of the stator when the stator is coupled. The method of claim 8, The auxiliary support protrusion Drum washing machine, characterized in that formed in one piece with the support protrusion.

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