KR20090101054A - Flange assembly of washing machine - Google Patents

Abstract

PURPOSE: A flange assembly of a drum washing machine is provided to improve productivity while offering sufficient mechanical strength capable of supporting a rotary drum stably by forming the assembly through press-molding. CONSTITUTION: A flange assembly(10) of a drum washing machine includes a flange, a rotary shaft, and a coherence enforcement member. The flange(11) includes a rotary shaft support(12), an arm, and a fixing unit. The arm(16) is extended from the rotary shaft support to a radial shape. The fixing unit(17) is formed on an end of the arm. Curvature of the rotary drum is the same with the curvature of the rotary drum. The rotary shaft(30) is installed at the rotary shaft support of the flange. The coherence enforcement member is formed to improve coherence between the rotary shaft and the rotary shaft support. The coherence enforcement member includes a first welding connection part, a second welding connection part, and an extension part. The first welding connection part is welded on an outer circumference of the rotary shaft penetrating a shaft joint hole.

Description

Flange assembly of washing machine

The present invention relates to a flange assembly of a drum washing machine, and more particularly, to a flange assembly of a drum washing machine which is coupled to a rotating drum and formed through press molding.

In general, the drum washing machine washes the laundry using friction force of the laundry by rotating the rotating drum in the state where the detergent and the washing water and the laundry are put in the rotating drum, and the damage of the laundry is almost no problem and the laundry does not get tangled with each other. This demand is increasing.

Such a drum washing machine is installed in a structure that is suspended inside the housing forming the outer appearance, and a fixed drum in which the wash water is fresh, a rotating drum installed in the fixed drum to enable forward and reverse rotation, and the wash water in the fixed drum. A water circulation device for supplying and discharging is provided. The rotating drum is driven by a drive motor, and thus a flange assembly is provided to transfer the power of the drive motor to the rotating drum.

The flange assembly installed in the drum washing machine includes a flange fixed to the rear side of the rotating drum by a mounting bolt, a rotating shaft fixed to a central portion of the flange, and a bearing housing supporting the rotating shaft. The bearing housing supporting the rotating shaft is provided with an oil seal to prevent the wash water from leaking.

Since the flange of the flange assembly supports the rotating drum about the rotating shaft and is driven in the washing water in the fixed drum, the flange has corrosion resistance and sufficient structural strength. The flange of the drum washing machine was formed of aluminum die casting material in consideration of structural strength.

A drum washing machine having a flange assembly is disclosed in Korean Unexamined Patent Publication No. 2000-0050447, Korean Patent Publication No. 20020037814, Korean Patent Publication No. 2001-0047988 and Korean Patent Publication No. 2005-0048254.

In the above drum washing machines, the flange supporting the rotating drum is formed of aluminum produced by the die casting method, thereby limiting the productivity improvement, and it is difficult to reduce the production cost due to the large number of labors.

It is an object of the present invention to provide a flange assembly of a drum washing machine which can be improved in productivity by forming through press molding while having sufficient mechanical strength.

The flange assembly of the drum washing machine according to the present invention is formed by press molding and is coupled by a rotary drum and a coupling means installed in the fixed drum to enable forward and reverse rotation, and includes a rotation shaft support portion and a radial direction from the rotation shaft support portion. A flange including a plurality of arms extending, a fixed portion formed at an end of the arm and having a curvature equal to the curvature of the inner circumferential surface of the rotating drum, a rotating shaft provided on the rotating shaft support of the flange, and the rotating shaft and the rotating shaft. In order to enhance the coupling force between the support, the shaft is formed with a shaft fastening hole through which the rotation shaft extends, the first welding coupling portion welded to the outer circumferential surface of the rotating shaft passing through the shaft fastening hole, and the rotary shaft support portion The predetermined length is extended to correspond to the curvature of the inner peripheral surface of the rotary shaft support portion And a coupling force enhancing member including a second welding coupling part welded to an inner circumferential surface and an extension part connecting the first and second welding coupling parts.

The rotary shaft support portion includes a protrusion connecting portion protrudingly connected toward the rotation center of the rotary shaft support portion so that the inner circumferential surface of the arm can be connected to the curvature, wherein the first and second weld coupling portions of the coupling force promoting member It is preferable that a predetermined length is formed to extend upward or downward along the joint surface of the outer circumferential surface of the rotary shaft and the inner circumferential surface of the rotary shaft support portion respectively joined from the inner and outer ends of the extension portion so as to increase the joining surface area.

The extension portion has a plurality of reinforcing beads extending radially from the shaft fastening hole, the length of the arm or the length of the arm so as to prevent the arm from bending by the load of the rotating drum It is preferable that the reinforcing rib formed in the said arm in the direction orthogonal to a direction is further provided.

In addition, the flange or the rotating shaft is formed with a plating layer surrounding the outer circumferential surface to prevent corrosion by moisture, the arm is a base portion extending from the rotating shaft support portion, a skirt portion extending upward from both ends of the base portion, It may include a wing that interconnects the top of the skirt of adjacent arms.

The flange assembly of the drum washing machine according to the present invention can be easily manufactured to increase productivity, and can have sufficient mechanical strength to stably support the rotating drum.

Hereinafter, a flange assembly (hereinafter referred to as a 'flange assembly') of a drum washing machine according to the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1, a drum washing machine 1 is installed in a housing (not shown) that forms an exterior, and a drum washing machine 1 includes a fixed drum 2 for washing fresh water and a fixed drum 2. ) And a flange assembly (10) for supporting the rotating drum (3) so as to be rotated forward and backward. In addition, although not shown in the drawings, a driving motor for providing a driving force to the rotation shaft 30 of the flange assembly 10 and a water circulation device for supplying and discharging the washing water in the fixed drum 2 are provided inside the housing. .

1 to 4, the flange assembly 10 is coupled by the rotary drum 3 and the coupling means 40, a flange 11 formed by press molding an aluminum material, and the flange ( 11) is provided with a rotating shaft 30 fixedly supported.

The rotating shaft 30 is rotatably supported by a bearing housing 5 installed in the fixed drum 2, and the bearing housing 5 is provided with a sealing member 6 for preventing leakage of washing water. .

The flange 11 has a rotating shaft support 12 to which the rotating shaft 30 is fixed, and arms 16 provided radially from the rotating shaft support 12.

The rotary shaft support 12 is an installation groove 13 through-hole 14, 14 which is drawn in a predetermined depth downward, the through-hole 14 through the inner circumferential surface and the outer circumferential surface is formed on the side of the rotary shaft support 12 The fastening member 15 is inserted into the through holes 14 so that the rotary shaft 30 is fixed to the rotary shaft support 12.

The arms 16 extend radially from the rotary shaft support part 12 to support the rotary drum 3. As described above, the arms 16 are formed to have a cross-sectional shape by press molding, and each arm 16 has a rotary shaft support part. It is formed at equal intervals along the circumferential direction of (12). In this embodiment, since there are three arms 16, each of them extends 120 ° apart. However, unlike the present embodiment, four to six arms 16 extend radially from the rotary shaft support 12, respectively. Can be. Of course, regardless of the number of the formation of the arms 16, each of the arms 16 is preferably formed spaced at equal intervals.

When the flange assembly 10 supports the rotating drum 3, the arm 16 supports the load of the rotating drum 3 applied downwardly orthogonal to the rotating shaft 30. Therefore, in the case where the arm 16 is formed of a strip-shaped panel, in order to prevent buckling of the arm 16, the arm 16 should be made thick so that the load of the rotating drum 3 can be supported. Since the amount of material required for manufacturing increases, the production cost increases.

Thus, in order to increase the structural strength of the arm 16 against the vertical load applied to the arm 16 supporting the rotating drum 3, the arm 16 has a valley 19a and a hill 19b in cross section. It is preferable to be formed to have a wave shape. In the present embodiment, the cross section of the arm 16 is formed in a 'W' shape, but if necessary, it may be formed to have more bone portions 19a and ridges 19b, and one bone portion 19a. It may be formed in a 'V' shape having only).

The reinforcing rib 20 is for reinforcing the structural strength of the arm 16 and is formed to extend along the longitudinal direction of the arm 16 on the outer side of the arm 16 in the press molding process. The stepped rib is formed at the outermost side of the arm 16 by the reinforcing rib 20. Thus, even though the width of the arm 16 is not increased by the reinforcing rib 20, the structural strength is increased.

Unlike the present embodiment, the reinforcing rib 20 may be formed to protrude toward the inside of the arm 16, and as shown in FIG. 5, the reinforcing rib 20 is fixed to extend in a direction perpendicular to the longitudinal direction of the arm 16. Ribs 21 may be formed.

An end portion of the arm 16 is provided with a fixed portion 17 which is engaged by the rotating drum 3 and the engaging means 40.

The fixing portion 17 is bent at the end of the arm 16, the outer peripheral surface of the fixing portion 17 in contact with the inner circumferential surface of the rotating drum 3 has the same curvature as the circumferential curvature of the inner circumferential surface of the rotating drum 3 It is formed to have a, and the contact surface with the inner circumferential surface of the rotating drum 3 is formed with a coupling hole 18 penetrating the fixing portion 17 in the extending direction of the arm (16).

In the present embodiment, the fixing part 17 is formed at the end of the arm 16 is bent, but the fixing part 17 is separate if it can stably fix the flange assembly 10 to the rotating drum (3) The fixing part 17 can also be formed by fastening to the edge part of the arm 16. FIG.

Coupling means 40 is rotated by extending through the coupling hole 18 of the fixing portion 17 through the bolting hole (4) penetrating the inner and outer peripheral surface of the rotary drum (3) in contact with the fixing portion 17 The fixing portion 17 is fixed to the drum 3.

In this embodiment, a fastening bolt is screwed to the fixing part 17 through the bolting hole 4 and the coupling hole 18 as the coupling means 40, but the coupling means 40 is the arm 16. Various methods can be applied to allow the end of the to be coupled to the rotating drum (3).

6 shows another embodiment of a flange assembly 50 according to the present invention.

The flange assembly 50 of this embodiment includes a rotary shaft support 51, a flange 51 having three arms 52, and a rotary shaft 60 welded to the rotary shaft support 51.

The flange 51 is formed by press molding an iron plate. In general, the flange assembly used in the drum washing machine is made of aluminum, the iron plate is cheaper than aluminum and the recycling rate is high environmentally friendly.

Therefore, by forming the flange 51 by pressing the iron plate as in this embodiment, it is possible to expect the effect of reducing the production cost and environmental pollution through recycling.

The arm 52 includes a base portion 53 extending from the rotation shaft support portion 51, a skirt portion 54 extending upwardly from both ends of the base portion 53, and a skirt of an adjacent arm 52. A wing portion 55 interconnecting the top of the portion 54.

An end portion of the arm 52 is provided with a fixing portion 56, which, like the fixing portion 17 of the embodiment shown in Figs. 1 to 4, has the same curvature as the curvature of the inner circumferential surface of the rotating drum. Formed.

In addition, a plating layer 70 is formed on the flange 51 and the rotation shaft 60.

Since the flange 51 and the rotating shaft 60 are installed inside the drum washing machine and are exposed to moisture, there is a risk of corrosion. In particular, since the iron plate forming the flange 51 is not corrosion resistance is difficult to function properly when corrosion occurs to form a plating layer 70 to prevent the iron is corroded.

The plating layer 70 of the present embodiment is formed by plating chromium on the outer circumferential surfaces of the flange 51 and the rotating shaft 60. Since chromium is a very corrosion resistant metal, corrosion of the iron plate is prevented through the chromium plating layer 70. Of course, the plating layer 70 may be formed through another metal such as nickel or tin in addition to the chromium of the present embodiment.

The flange assembly 50 of the present embodiment is also coupled to the rotating drum by the coupling means, which is the same as the coupling means of the embodiment shown in Figures 1 to 4 detailed description thereof will be omitted.

7 and 8 illustrate a flange assembly 100 including a coupling force enhancing member 130.

The flange assembly 100 of the present embodiment includes a flange 110 and the rotation shaft 120 and a coupling force enhancing member 130 to promote the coupling force between the flange 110 and the rotation shaft 120.

The flange 110 includes a rotation shaft support portion 111, an arm 114 extending from the rotation shaft support portion 111, and a fixing portion 115 provided at an end of the arm 114. Three extending from the rotary shaft support 111, the base portion 114a extending from the rotary shaft support 111, as shown in the embodiment of Figure 6, and the skirt portion 114b extending upward from both ends of the base portion 114a And a wing portion 114c which interconnects an upper end of the skirt portion 114b of the adjacent arm 114.

Fixing portion 115 is provided at the end of the arm 114 is formed to be able to fix the flange assembly 100 to the rotating drum.

The rotary shaft support 111 is formed in the center of the flange 110 so that the rotary shaft 120 can be coupled, the rotary shaft support 111 is opened upward so that the rotary shaft 120 can be coupled.

The rotary shaft support part 111 includes an opening part 112 formed at a portion where the arm 114 extends during press molding, and a protrusion connecting part 113 between the opening part 112. The protruding connecting portion 113 has a predetermined curvature and is formed to protrude toward the center of the rotating shaft support portion 111. The arm 114 extends in the radial direction from the rotating shaft support portion 111 to the inner circumferential surface of the rotating drum. Since the formed portion is bent at a predetermined angle between the connecting portion of the arm 114 and the arm 114 or the connecting portion of the rotary shaft support 111 and the arm 114, through the rotating shaft 120 When the rotational force is transmitted, stress concentration occurs at the bent portion, and the breakage rate at the bent portion is very high. Therefore, in order to prevent such stress concentration, it is preferable that the arms 114 are connected to each other to form a curvature, so that the connecting portion 113 and the connecting portion of the arm 114 and the arm 114 are curvaturely connected to the rotary shaft support 111 are 113. ) Is formed.

Since the rotary shaft 120 is the same as the rotary shaft 120 of the foregoing embodiments, a detailed description thereof will be omitted.

The coupling force enhancing member 130 is for maximizing the coupling force between the rotation shaft 120 and the flange 110.

As described above, the driving of the drum of the drum washing machine is performed by transmitting the driving force of the driving motor to the flange assembly 100 by the drum. More specifically, when the drive motor rotates the rotating shaft 120, the flange 110 is coupled to the rotating shaft 120 to rotate the rotating drum together.

Therefore, if the coupling portion between the rotation shaft 120 and the flange 110 is not firmly joined, breakage may occur in this portion, and thus a coupling force enhancing member is required to increase the coupling force between the rotation shaft 120 and the flange 110. Do.

The coupling force promoting member 130 has a shaft fastening hole 132 through which the rotating shaft 120 can penetrate at the center thereof, and has a first welding coupling portion 131 welded to the outer circumferential surface of the rotating shaft 120 and the rotating shaft. And a second welding coupler 135 welded to the protruding connecting portion 113 of the support 111 and an extension 133 interconnecting the first and second weld couplers 131 and 135.

The first welding coupling part 131 extends a predetermined length downward from the edge of the shaft fastening hole 132 so that the area of the joint surface welded to the outer circumferential surface of the rotation shaft 120 is increased.

The extension part 133 is a plate shape which extends along the horizontal direction as connecting the first and second welding coupling parts 131 and 135 to each other. Reinforcing beads 134 are formed.

Since the reinforcing beads 134 are for reinforcing the strength of the extension part 133 in the rotational direction, the plurality of reinforcing beads 134 are preferably spaced apart from each other by a predetermined interval so as to extend radially from the shaft fastening hole 132.

In this embodiment, six reinforcement beads 134 are illustrated, but the number and spacing of the reinforcement beads 134 may be variously formed without being limited by the present embodiment.

The second weld coupling part 135 also extends downwardly from the end of the extension part 133 along the protruding connection part 113 of the rotary shaft support part 111, and the protruding connection part 113 is the rotary shaft support part. Since the second protruding portion 135 protrudes to have a predetermined curvature toward the center of the 111, the second weld coupling part 135 also extends to correspond thereto.

As described above, when the bent portion is formed at the connection portion to which the arms 114 are connected, the flange 110 increases the risk of breakage due to stress concentration, and thus the arms 114 are extended to be curvature. The connecting portion extending to have a predetermined curvature is formed in the 111, such as the projecting connecting portion 113 of the present embodiment.

In the case of the rotary shaft 120, if the joint surface corresponding to the connecting portion having the curvature is not formed at the lower end of the rotary shaft 120, the rotary shaft support part 111 extends in curvature so that the rotary shaft 120 and the rotary shaft support part 111 are formed. ) Are coupled by point contact at three points where they are in contact with each other, so the coupling force is very small. In addition, molding the joint surface corresponding to the curvature extension portion 133 on the rotating shaft 120 itself is also not easy to work, and even if the manufacturing cost is very high, the rotating shaft 120 It is also impractical to mold the joint surface corresponding to the curvature extension 133.

Therefore, it is preferable to maximize the coupling force between the rotating shaft 120 and the flange 110 through a separate coupling force promoting member 130 as in the present invention.

The coupling force increasing member 130 is formed to extend a predetermined length downward so that the first welding coupling portion 131 can be firmly bonded to the rotation shaft 120, and the bonding area is increased, and the second welding coupling portion 135 is formed. Also, the predetermined length is extended downward to increase the bonding area with the rotary shaft support 111 and has a curvature corresponding to the protruding connection portion 113, thereby increasing the coupling force between the rotary shaft 120 and the flange 110.

1 is a cross-sectional view of a drum washing machine in which a flange assembly for a drum washing machine according to the present invention is installed;

Figure 2 is an exploded perspective view showing a state in which the rotating drum and the drum assembly flange assembly is coupled,

3 is an exploded perspective view of a flange assembly for a drum washing machine;

4 is a partially cutaway perspective view showing a cross section of the arm,

5 is a partially cutaway perspective view showing another embodiment of the reinforcing rib;

6 is a perspective view showing an embodiment of a flange assembly having a plating layer;

Figure 7 is a partially cut perspective view showing a flange assembly for a drum washing machine having a bonding force promoting member,

FIG. 8 is a partial exploded perspective view of FIG. 7.

<Explanation of symbols for the main parts of the drawings>

10; Flange assembly

11; flange

12; Rotary shaft support

16; Arm

17; Fixture

20; Reinforcement rib

30; Axis of rotation

Claims (5)

It is formed by press molding and is coupled by a rotating drum and a coupling means installed in the fixed drum to enable forward and reverse rotation, the rotating shaft support portion, a plurality of arms extending radially from the rotating shaft support portion, A flange formed at an end and including a fixing part formed to have the same curvature as the curvature of the inner circumferential surface of the rotating drum; A rotating shaft installed in the rotating shaft supporting portion of the flange; And The first welding coupling is to enhance the coupling force between the rotating shaft and the rotating shaft support portion, the shaft fastening hole is formed through which the rotating shaft can extend and is welded to the outer circumferential surface of the rotating shaft passing through the shaft fastening hole. And a second welding coupling part extending a predetermined length to correspond to the curvature of the inner circumferential surface of the rotary shaft support part and the extension part connecting the first and second welding coupling parts to be welded to the inner circumferential surface of the rotary shaft support part. Flange assembly of the drum washing machine comprising a. The method of claim 1, The rotary shaft support portion includes a protruding connecting portion for protruding the inner circumferential surface protruding toward the center of rotation of the rotary shaft support portion so that the end portion of the arm can be connected curvature, The first and second welded joints of the coupling force enhancing member are upward or along a joining surface of the outer circumferential surface of the rotary shaft and the inner circumferential surface of the rotary shaft support portion respectively joined from the inner and outer ends of the extension portion to increase the bonding area for increasing the bonding force. Flange assembly of the drum washing machine, characterized in that formed to extend a predetermined length downward. The method of claim 2, The extension portion is a flange assembly of the drum washing machine, characterized in that a plurality of reinforcing beads extending radially from the shaft fastening hole. The method of claim 3, wherein And a reinforcing rib formed on the arm in a direction perpendicular to the longitudinal direction of the arm or the longitudinal direction of the arm so as to prevent the arm from being bent by the load of the rotating drum. Flange assembly. The method of claim 4, wherein The flange or the rotating shaft is formed with a plating layer surrounding the outer circumferential surface to prevent corrosion by moisture, the arm is adjacent to the base portion extending from the rotating shaft support portion, the skirt portion extending upward from both ends of the base portion, Flange assembly of the drum washing machine comprising a wing portion for interconnecting the top of the skirt portion of the arm.

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