KR101208497B1 - 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 formed with a tooth, a coil wound around the tooth, a first insulator coupled to a coupling portion of the tub and surrounding the front surface of the core portion, a second insulator surrounding a rear surface of the core portion, and a front surface of the first insulator A stator including a partition rib partitioning between a portion coupled to the coupling portion of the tub and a portion of the coil wound; A rotor positioned outside the stator and configured to form a motor together with the stator; In addition, a drum washing machine is provided that includes a support rib provided along an entire portion of the rear wall surface of the tub to support the inner wall surface of the partition rib.

Drum Washing Machine, Stator, Insulator, Support Rib, Secondary 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

DESCRIPTION OF THE REFERENCE NUMERALS

200. Tub 210. Step

220. Stepped portion 221. Rib for strength reinforcement

230. Coupling part 231. First fastener

232. Positioning groove 600. Stator

610. Core part 620. First insulator

630. Second insulator 621,631. 2nd conclusion

622,632. Protrusion 623. Positioning protrusion

640. Coil 650. Compartment Rib

810. Support ribs 811. Fixed protrusions

820. Secondary Ribs

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 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 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 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 formed with a tooth, a coil wound around the tooth, a first insulator coupled to a coupling portion of the tub and surrounding the front surface of the core portion, a second insulator surrounding a rear surface of the core portion, and a front surface of the first insulator A stator including a partition rib partitioning between a portion coupled to the coupling portion of the tub and a portion of the coil wound; A rotor positioned outside the stator and configured to form a motor together with the stator; In addition, a drum washing machine is provided that includes a support rib provided along an entire portion of the rear wall surface of the tub to support the inner wall surface of the partition rib.

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, and the support rib 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 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, and a compartment rib 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 covering 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, which is the side opposite to the tub 200, the site (part coupled to the coupling portion of the tub) and the protrusion 622 is formed and the Coil 640 is configured to partition between the wound and the site. 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 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 support rib 810 is configured to support the inner wall surface of the partition rib 650 formed in the first insulator 620 as shown in FIGS.

In this case, the support rib 810 is provided along the entire portion of the inner wall surface of the partition rib 650 when the stator 600 is coupled among the rear wall surfaces of the tub 200.

Preferably, the outer surface of each coupling portion 230 is wrapped around the rear wall of the tub 200 and is formed in an annular shape that crosses each of the stepped portions 220.

In addition, the support rib 810 is preferably made of a separate piece from the tub 200 and then coupled to be fixed to the rear wall surface of the tub 200. In this case, the support rib 810 is preferably formed of a rubber material.

In this case, as shown in Figure 7 attached to each of the portions of the support ribs 810 located in the stepped portion 220 of the tub 200, each strength reinforcing bead 221 formed in the stepped portion 220 It is preferable that a fixing protrusion 811 is further formed to protrude toward and fixed between the strength reinforcing beads 221.

Of course, the support rib 810 may be formed to be integral with the stepped portion 220 when the tub 200 is manufactured. This is because, when the tub 200 is formed to be integrated with the stepped portion 220 through the modification of the mold for manufacturing the tub 200, it may be advantageous in reducing the manufacturing cost and the number of operations.

In addition, the height of the support rib 810 is not formed in contact with the front surface of the first insulator 620, it is preferable that the height is formed so as to be in surface contact with the inner wall surface of the partition rib 650. .

In particular, the thickness of the support rib 810 is preferably formed to a thickness such that the strength reinforcement to the rear wall surface of the tub 200 separately from the strength reinforcing beads 221 of the tub 200. At this time, the thickness is approximately 2 to 5 mm, preferably formed to be substantially the same as the thickness of the strength reinforcing beads 221.

In addition, the support rib 810 is preferably formed to be rounded while forming the same arc as the arc formed by the partition rib 650 of the stator 600.

This is to allow the support rib 810 to stably support the compartment rib 650 by allowing the support rib 810 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 ribs 810, thereby preventing breakage of the corresponding portions due to load concentration to the localized portions.

Meanwhile, a positioning groove 232 is further formed in the coupling portion 230 of the tub 200 of the drum washing machine according to the embodiment of the present invention, and the positioning groove is formed in the first insulator 620 of the stator 600. Preferably, the positioning projection 623 inserted into the 232 is further formed.

The positioning protrusion 623 and the positioning groove 232 are configured to be coupled to match each other when the stator 600 is coupled to the tub 200 so that the coupling position of the stator 600 can be accurately determined. will be.

Reference numeral 910 denotes a hall sensor assembly, and reference numeral 920 denotes a tab housing assembly for power connection.

Referring to 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 are as follows.

First, the positioning protrusions 623 of the first insulator 620 forming the stator 600 coincide with each of the positioning grooves 232 of the coupling portion 230 formed on the rear wall of the tub 200. .

In this case, the outer circumferential surface of the support rib 810 formed on the rear wall surface of the tub 200 is located inside the partition rib 650 formed on the front surface of the first insulator 620 and the partition rib 650. Will support the entire inner wall.

In addition, the first fastening holes 231 of the coupling part 230 and the second fastening holes 621 and 631 formed in the protrusions 622 and 632 of the stator 600 coincide with each other.

Therefore, even when the stator 600 sags in the direction of gravity due to its own load, the breakage of the positioning protrusion 623 is prevented while the stator 600 is fastened to the tub 200. In particular, since the support rib 810 is formed of a rubber material having a large friction force, the position change of the stator 600 is prevented when it comes in contact with the inner wall surface of the partition rib 650, and a smooth fastening operation may be performed. .

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 above-described series of processes.

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, as shown in FIGS. 9 and 10, when the stator 600 is coupled among the rear walls of the tub 200, the outer wall surface of the partition rib 650 formed in the first insulator 620 is located. It may be further provided with an auxiliary rib 820 surrounding the outer wall surface of the partition rib 650.

In this case, the auxiliary rib 820 is preferably formed in the same manner as the support rib 810 to surround the entire outer wall of the partition rib 650. Of course, the auxiliary rib 820 may be formed integrally with the support rib 810, or may be formed separately from the support rib 810.

The auxiliary rib 820 as described above is configured to stably support both the inner wall surface and the outer wall surface of the partition rib 650 together with the support rib 810.

In this case, the process of matching the stator 600 to the rear wall surface of the tub 200 by the support rib 810 may be more easily performed.

In addition, even if vibration occurs in the tub 200 and the stator 600 by the rotation of the rotor 5 during the washing machine operation, the support rib 810 and the auxiliary rib 820 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 a separate support rib 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 ribs.

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 rib.

Claims (10)

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 formed with a tooth, a coil wound around the tooth, a first insulator coupled to a coupling portion of the tub and surrounding the front surface of the core portion, a second insulator surrounding a rear surface of the core portion, and a front surface of the first insulator A stator including a partition rib partitioning between a portion coupled to the coupling portion of the tub and a portion of the coil wound; A rotor positioned outside the stator and configured to form a motor together with the stator; And, And a support rib provided along an entire portion of the rear wall of the tub in which the inner wall of the partition rib of the stator is positioned to support the inner wall of the partition rib. The support rib The drum washing machine is formed in an annular shape to wrap the outer surface of each coupling portion of the rear wall of the tub and to cross each stepped portion. delete The method of claim 1, The support rib Drum washing machine, characterized in that formed integrally on the rear wall surface of the tub. The method of claim 1, The support rib Drum washing machine is provided in a separate piece from the rear wall surface of the tub, it is coupled to the rear wall surface of the tub. The method of claim 1, The support rib 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 formed to have a height high enough to be in surface contact with the inner wall of the partition rib. Drum washing machine characterized in that. The method of claim 1, The support rib Drum washing machine, characterized in that formed to a thickness enough to reinforce the strength of the rear wall surface of the tub. The method of claim 1, The support rib Drum washing machine, characterized in that the circular arc formed in the same shape as the partition rib. The method of claim 1, Each stepped portion of the tub is further provided with a plurality of strength reinforcing beads for reinforcing the strength, Drums washing machine, characterized in that the fixing protrusions are fixed to each of the strength reinforcing beads protruding toward each of the strength reinforcing beads in the portion located in the step portion of the tub of the support ribs. The method of claim 1, Drum washing machine further comprises an auxiliary rib surrounding the outer wall of the partition rib along the entire portion of the portion of the rear wall of the tub is located in the outer wall of the partition rib of the stator. Tub formed with a protrusion protruding from the rear wall; A bearing housing which is inserted at the time of injection of the tub so as to be integral with the tub; A stator coupled to the coupling portion of the tub, the stator including a partition rib configured to partition between a portion coupled to the coupling portion of the tub and a portion of the coil wound; A rotor positioned outside the stator and configured to form a motor together with the stator; And, Strength reinforcing ribs to prevent bending during the injection of the tub on the rear wall of the tub, and support ribs provided along the entire portion where the inner wall surface of the compartment ribs of the stator are positioned to support the inner wall surface of the compartment ribs: Drum washing machine characterized in that configured.

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