KR102487833B1 - Bearing housing for drum washing machine - Google Patents

Abstract

The present invention relates to a reinforcing structure of a bearing housing assembly for a drum washing machine, wherein a flange portion of a bearing shaft includes a hub portion in which a shaft portion protrudes from its center, and a bridge portion provided to protrude outward from the hub portion, wherein the hub portion It is formed to have a thicker thickness than the bridge portion, while a bead is provided on the surface of the hub portion;
The bearing housing includes a pipe portion into which the axis of the bearing shaft is inserted and coupled therethrough, and a reinforcement portion coupled to the pipe portion, the reinforcement portion including a ring body inserted into the pipe portion and provided, and reinforcing wings provided to protrude outward from the ring body, , unevenness is formed on the surface of the reinforcing wing;
A bearing for a drum washing machine in which a fiber layer made of carbon fiber is provided on the bearing shaft and the bearing housing, and a resin layer made of a mixture of polyketone, polypropylene, or polyethylene terephthalate and glass fiber surrounds the bearing shaft and the bearing housing, including the fiber layer. Provides a reinforcing structure for the housing assembly.

Description

Reinforcing structure of bearing housing assembly for drum washing machine {Bearing housing for drum washing machine}

The present invention relates to a bearing housing assembly for a drum washing machine, and more particularly, to reinforce the strength and durability of a bearing housing and a bearing shaft constituting the bearing housing assembly of a drum washing machine, reduce the weight of the corresponding parts, and largely reduce the overall drum washing machine ( The present invention relates to a reinforcing structure of a bearing housing assembly for a drum washing machine, which can greatly contribute to cost reduction by reducing material cost as well as improving quality by reducing the weight of a set).

In general, a drum washing machine is a type of washing by using the frictional force of the laundry while the drum is rotated by receiving the driving force of the motor in a state in which detergent, washing water, and laundry are put into the drum. It does not get tangled, and you can get a washing effect by tapping and scrubbing.

A conventional drum washing machine having such a washing effect has been disclosed in Korean Utility Model Registration No. 20-0436462 registered as a utility model by the present applicant.

As shown in FIG. 1, in the conventional drum washing machine disclosed in Republic of Korea Registration Office No. 20-0436462, a cylindrical tub 2 is installed inside a cabinet 1, and a cylindrical tub 2 is installed inside the tub 2. The drum 3 is rotatably installed.

A motor 4 is installed at one side of the lower end of the tub 2 as a driving means for rotating the drum 3, and a motor pulley 5 is connected to the motor 4.

A drive shaft (6) is installed at the rear of the drum (3), and a drum pulley (7) is installed and used at the rear end of the drive shaft (6). It is connected to the motor pulley 5 connected to (4) and rotates.

Meanwhile, a suspension spring 9 supporting the tub 2 is installed between the inner side of the upper surface of the cabinet 1 and the upper side of the outer circumferential surface of the tub 2, and between the inner side of the lower surface of the cabinet 1 and the lower side of the tub 2. A damper 10 for damping vibration of the tub 2 generated during dehydration is installed.

A balance weight 11 is installed on the front outer circumferential surface of the tub 2 to compensate for the imbalance of weight caused by the components formed in the rear portion of the tub 2, and a drum 3 is installed in the center of the rear portion of the tub 2. The bearing housing 13 in which the bearing 12 coupled while passing through the drive shaft 6 installed at the rear of the ) is press-fitted and installed is integrally formed by insert injection.

And, as shown in Figures 2 to 5, the conventional bearing housing 13 is formed of aluminum or metal material.

On the outer circumferential surface of the bearing housing 13, anti-rotation grooves 14 and anti-separation grooves 15 are formed at regular intervals in the vertical and horizontal directions, and the bearing housing 13 is made of engineering plastic 20 containing inorganic substances. Insert injection is performed, and these are constituted by insert injection into the tub 2 again.

Explaining this in more detail, the bearing housing 13 is formed in the form of a pipe having an inner diameter into which the bearing 12 can be press-fitted therein, so that the bearing 12 can be press-fitted and mounted. 12) It is manufactured to have an inner diameter that matches the outer diameter.

In order to use the bearing housing 13 configured as described above, first, the bearing housing 13 having the anti-rotation groove 14 and the anti-separation groove 15 on the outer circumferential surface, the engineering plastic 20 including the inorganic pillar, and the tub 2 ) After preparing, the bearing housing 13 is insert-injected into the engineering plastic 20.

In this way, when the bearing housing 13 is integrally insert-injected into the engineering plastic 20, these are again insert-injected into the tub 2 and molded.

However, such a conventional bearing housing 13 is formed by injection of engineering plastic 20 on its outer surface, which is caused by vibration generated during operation of the drum washing machine, which causes a gap between the bearing housing 13 and the engineering plastic 20. A gap may occur, and due to this gap, the coupling structure between the bearing housing 13 and the engineering plastic 20 is very weak.

In this way, the bearing housing 13 and the driving shaft 6 (corresponding to the “bearing shaft” in the present invention) bump into and collide with each other due to vibration generated during operation of the drum washing machine, which eventually leads to damage of parts. there is

Republic of Korea Utility Model Registration No. 20-0436462

Therefore, the present invention has been made to solve the problems of the prior art as described above, and the strength of the bearing housing and the bearing shaft is provided by providing a fiber layer and a resin layer to the bearing housing and the bearing shaft of the bearing housing assembly constituted in the drum washing machine. A drum washing machine that can prevent corrosion as well as reinforce durability, reduce the weight of the relevant part, and largely reduce the weight of the drum washing machine set to improve quality and significantly contribute to cost reduction by reducing material costs Its purpose is to provide a reinforcing structure of the bearing housing assembly for use.

In order to achieve the above object, a reinforcing structure of a bearing housing assembly for a drum washing machine according to the present invention includes a bearing shaft having a flange portion coupled to a drum and a shaft portion protruding from the flange portion, and the shaft portion of the bearing shaft being rotatable. As a reinforcing structure of a bearing housing assembly for a drum washing machine including a bearing housing that is inserted and coupled, a fiber layer made of carbon fiber is provided on the bearing shaft and the bearing housing, and polyketone or polypropylene is provided on the bearing shaft and the bearing housing including the fiber layer. Alternatively, a resin layer in which polyethylene terephthalate and glass fibers are mixed may be provided to surround it.

In addition, the flange portion of the bearing shaft includes a hub portion in which the shaft portion protrudes from the center and a bridge portion protruding outward from the hub portion, but the hub portion is formed to have a thicker thickness than the bridge portion, while the surface of the hub portion Beads may be provided.

"자 형상으로 절곡 형성된 절곡브라켓이 구비되고, 마운팅브라켓과 절곡브라켓 사이에 드럼이 삽입된 상태에서 절곡브라켓과 마운팅브라켓을 관통하는 체결수단으로 결합 고정되게 구비될 수 있다.In addition, the bridge part is provided in combination with the drum, and the bridge part has a mounting bracket that is cut and erected on the surface, and the end of the bridge part spaced apart from the mounting bracket is "

A bending bracket bent in a "character shape" is provided, and in a state in which a drum is inserted between the mounting bracket and the bending bracket, the bending bracket and the mounting bracket may be coupled and fixed by a fastening means penetrating the mounting bracket.

In addition, the bearing housing includes a pipe portion into which the axis of the bearing shaft is inserted and coupled through, and a reinforcement portion coupled to the pipe portion, wherein the reinforcement portion includes a ring body inserted into the pipe portion and reinforcing wings provided to protrude outward from the ring body. Including, unevenness may be formed on the surface of the reinforcing wing.

According to the reinforcing structure of the bearing housing assembly for a drum washing machine of the present invention, a fiber layer made of carbon fiber and a resin layer are provided on the surfaces of the bearing housing and the bearing shaft constituted in the bearing housing assembly of the drum washing machine, so that the bearing housing and the bearing shaft In addition to improving strength and durability, there is an effect of preventing corrosion thereof.

1 is a configuration diagram of a general drum washing machine.
2 is a perspective view showing a conventional bearing housing.
3 is an exploded perspective view of a conventional bearing housing in a separated state.
4 is a cross-sectional view of a state in which a conventional bearing housing is inserted.
FIG. 5 is an enlarged view of portion A of FIG. 4 .
6 is a coupling diagram of a bearing shaft according to the present invention.
7 is an exploded view of a bearing shaft according to the present invention.
8 is a cross-sectional view of a bearing shaft according to the present invention.
9 is an enlarged configuration diagram of part “A” of FIG. 6 .
10 is a combined view of a bearing housing according to the present invention.
11 is an exploded view of the bearing housing according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The terms used in the present invention are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of the user or operator, so the definitions of these terms are meanings consistent with the technical details of the present invention. and should be interpreted as a concept.

In addition, the embodiments of the present invention do not limit the scope of the present invention, but are only exemplary of the components presented in the claims of the present invention, are included in the technical spirit throughout the specification of the present invention, and cover the scope of the claims. It is an embodiment including components that can be replaced as equivalents in components.

In addition, optional terms in the following embodiments are used to distinguish one element from other elements, and elements are not limited by the terms.

Therefore, in describing the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the gist of the present invention will be omitted.

6 to 11 are drawings showing a bearing shaft and a bearing housing according to the present invention.

First, prior to describing the present invention, the same reference numerals are assigned to the same parts as those in the prior art, and overlapping descriptions are omitted.

As shown in FIGS. 6 to 11 , a bearing housing assembly for a drum washing machine according to the present invention includes a bearing shaft 100 and a bearing housing 200 .

The bearing shaft 100 is provided with the drum 3 coupled and fixed to one side thereof, and the bearing housing 200 is coupled to and provided with the other side of the bearing shaft 100.

As shown in FIGS. 6 and 7 , the bearing shaft 100 includes a plate-shaped flange portion 120 to which the drum 3 is coupled and fixed, and a shaft portion provided to protrude in one direction from the center of the flange portion 120. (110).

The flange portion 120 and the shaft portion 110 may be integrally formed, or the shaft portion 110 is inserted into the center of the flange portion 120 and coupled and fixed through a fixing means such as a key combination to form the shaft portion 110 ) and the flange portion 120 may be provided to rotate together.

In addition, the shaft portion 110 of the bearing shaft 100 is provided to be connected to the driving means while penetrating the bearing housing 200 to be described later, and the drum 3 coupled to the flange portion 120 while being rotated by the driving means ) is rotated to perform operations such as washing and spin-drying of laundry.

In addition, the flange portion 120 is formed of a triangular iron plate made of carbon steel (SM45C) or an iron plate (spring steel), and a hub portion 121 having a shaft portion 110 protruding from its center, and a hub portion It includes a bridge portion 123 provided coupled to the outer end of (121).

The hub portion 121 has protruding portions maintained at regular intervals on its outer circumferential surface, and a bridge portion 123 is coupled to the protruding portion of the hub portion 121 and provided.

In particular, a bead 122 protruding upward or downward is formed on the surface of the hub portion 121 (in this embodiment, a bead protruding upward is illustrated as an example), and the bead 122 is formed from the center of the hub part 121 toward the end of the bridge part 123.

By such beads 122, it is possible to improve stiffness and durability against torsion or bending acting on the hub portion 121 connected to the bridge portion 123.

On the other hand, the bridge portion 123 may be coupled and fixed to the protruding end of the hub portion 121 through a fixing means such as riveting, bolting, or welding, but in the present embodiment, the bridge portion ( 123) is exemplified as an example of a structure in which riveting is combined and fixed in an overlapped state.

The bridge part 123 is formed with a thickness thinner than the hub part 121, specifically, the hub part 121 is formed with a thickness of 3T (the entire thickness of the hub part 121 including the protrusion), while the bridge The portion 123 can save material by being formed to a thickness of 2T.

"자 형상으로 절곡 형성된 절곡브라켓(125)을 포함하며, 이러한 절곡브라켓(125)과 마운팅브라켓(124)에는 체결볼트가 관통 결합되는 체결구멍이 동일 선상으로 일치되게 형성된다.In particular, as shown in FIG. 9, the bridge part 123 has a fastening part formed at its end, and this fastening part is cut from the surface of the bridge part 123 and erected vertically, the mounting bracket 124, and the mounting bracket ( 124) and at the end of the bridge part 123 spaced apart "

It includes a bending bracket 125 bent in a "character shape," and the bending bracket 125 and the mounting bracket 124 have fastening holes through which fastening bolts are penetrated and formed to coincide on the same line.

As a result, between the mounting bracket 124 and the bending bracket 125, the drum 3 is seated as a fastening bolt penetrating the bending bracket 125 and the mounting bracket 124, so that the bearing shaft 100 and As the drum 3 rotates together, washing and spin-drying are performed.

On the other hand, as shown in FIG. 8, the bearing shaft 100 configured as described above is provided with a fiber layer 300 made of carbon fiber on one side of the flange portion 120 facing the shaft portion 110, and the fiber layer 300 A resin layer 400 in which polyketone, polypropylene, or polyethylene terephthalate and glass fibers are mixed is provided to cover the entire surface of the flange portion 120, including ).

The fiber layer 300 may be provided over the entire surface of the flange portion 120, but even if it is provided only on one side of the flange portion 120 where the shaft portion 110 connected to the drive means is transmitted through the bearing shaft 100 It absorbs the vibration force and has strength and durability that can withstand it.

The carbon fiber layer 300 is firmly provided by being adhered and fixed to one surface of the flange portion 120, which is a release material, with an epoxy resin.

In addition, the resin layer 400 is injection-molded on the flange portion 120 provided with the carbon fiber layer 300, and is provided to cover the entire surface of the flange portion 120 including the carbon fiber layer 300.

The resin layer 400 is composed of a mixture of polyketone, polypropylene, or polyethylene terephthalate and glass fibers in a ratio of 7 to 9:3 to 1.

In particular, polyketone is widely used as a plastic material that replaces metal because of its excellent resistance to heat, friction, impact, and chemicals.

Polypropylene has excellent flowability during molding, dimensional stability, gloss, chemical resistance, bending fatigue resistance, and density and heat resistance, which are the best among legal plastics. have characteristics

Polyethylene terephthalate (PET) is a relatively dense polyester resin and is a crystalline or amorphous thermoplastic. It has high hardness, stiffness and strength, and has excellent thermal properties such as excellent creep strength and low water absorption and It has the characteristic of dimensional stability.

In particular, the resin layer 400 as described above is composed of any one selected from polyketone, polypropylene, or polyethylene terephthalate, and such a resin is a recycled resin and is environmentally friendly because it can recycle waste resin discarded in daily life. It is an eco-friendly energy that can improve quality and save energy by not only reducing cost while maintaining the same strength and durability characteristics as when using resin, but also reducing the weight of the drum washing machine by reducing the weight of parts. There are benefits to savings.

In addition, glass fiber has good flame retardancy, no water absorption, low hygroscopicity, excellent chemical durability and no corrosion, excellent strength, especially tensile strength, low elongation, and high electrical insulation. It has low abrasion resistance and has good heat and sound insulation properties.

These glass fibers, along with the above-mentioned resin, are materials that improve the strength and durability of the bearing shaft 100 and the bearing housing 200 to be described later, while preventing bending and contraction. If the mixing ratio of glass fibers is less than 1, the resin The required strength and durability cannot be secured, and the flexural strength and shrinkage strength cannot be maintained because the glass fiber content is too small compared to the content. If the glass fiber mixing ratio exceeds 3, the resin content is too low and characteristics cannot be preserved.

Therefore, it is preferable that polyketone, polypropylene, polyethylene terephthalate, and glass fibers are mixed in a ratio of 7:3 to 9:1 to complement each other.

On the other hand, the bearing housing 200 is provided on one surface of the bearing shaft 100, and the shaft portion 110 of the bearing shaft 100 is rotatably coupled through.

Specifically, as shown in FIGS. 10 and 11, the bearing housing 200 is coupled to a pipe portion 210 into which the shaft portion 110 of the bearing shaft 100 is inserted and coupled through, and the pipe portion 210 It includes a reinforcement part 220 provided.

In particular, the pipe part 210 is formed with an expansion part 211 having an expanded diameter at one end thereof, and a stepped step part is formed inside the end opposite to the extension part 211, and each bearing is formed in the step part. inserted and provided.

Therefore, the shaft portion 110 of the bearing shaft 100 penetrated through the pipe portion 210 can rotate smoothly without frictional resistance with the pipe portion 210 by the bearing.

In addition, a plurality of through holes 212 are formed on the surface of the pipe part 210, and these through holes 212 are passages through which an injection-molded product can pass during injection molding of the resin layer 400 to be described later, and the through holes 212 The resin layer 400 is molded in a state in which the entire surface of the pipe 210 is evenly covered, and the molded resin layer 400 is molded and provided with a strong bonding force.

The reinforcing part 220 includes a ring body 221 fitted to the outer circumferential surface of the expansion part 211 of the pipe part 210 and a reinforcing wing 222 provided to protrude outward from the outer surface of the ring body 221.

In particular, the reinforcing blades 222 are three reinforcing blades installed at equal intervals on the outer circumferential surface of the ring body 221 as an example, but the number of reinforcing blades may be increased or decreased as needed.

These reinforcing blades 222 are iron plates made of carbon steel (SM45C) or spring steel, and as shown in FIG. It is formed long toward the outer side of the reinforcing blades 222 from the inner side of the reinforcing blades 222 with.

Thus, it is possible to improve the stiffness and durability against torsion or bending acting on the reinforcing blades 222.

In addition, a plurality of through holes 224 are formed on the surface of the reinforcing blades 222 as described above, and epoxy is applied to the through holes 224 to adhere the fiber layer 300 to the reinforcing blades 222. As the adhesive flows in, it is possible to fix the fiber layer 300 to the reinforcing blades 222 with a firm adhesive force.

Of course, the resin layer 400 is molded in the through hole 224 in a state in which not only the epoxy adhesive but also the injection product of the resin layer 400, which will be described later, flows in, so that the resin layer 400 can be firmly molded. .

On the other hand, the reinforcing blades 222 of the bearing housing 200 as described above are provided with a fiber layer 300 made of carbon fiber as shown in FIG. A resin layer 400 in which polyketone, polypropylene, or polyethylene terephthalate and glass fibers are mixed is provided to cover the entire surface of the shaft portion 110 of the bearing housing 200.

Here, since the fiber layer 300 and the resin layer 400 formed in the bearing housing 200 have the same configuration as the fiber layer 300 and the resin layer 400 of the bearing shaft 100, the same reference numerals will be given for description. .

In particular, the carbon fiber layer 300 may be provided over the entire surface of the reinforcing portion 220, but as in the present embodiment, even if provided only on one side of the reinforcing blade 222, the vibration damping effect as well as the reinforcing blade 222 strength and durability can be sufficiently secured.

In addition, the carbon fiber layer 300 is adhered and fixed to one surface of the reinforcing blade 222 with epoxy resin to be firmly attached to the reinforcing blade 222 of the steel plate, which is a release material.

In addition, the resin layer 400 has the same configuration as the resin layer 400 described in the above-described bearing shaft 100, and is injected to cover not only the reinforcing blades 222 provided with the carbon fiber layer 300, but also the pipe portion 210. It is molded and provided to cover the entire surface of the pipe part 210, including the carbon fiber layer 300.

At this time, the injection-molded resin layer 400 is formed to cover the entire surface of the pipe part 210 through the through hole 212 of the pipe part 210, so that the vibration caused by the driving of the bearing shaft 100 is reduced to the bearing housing 200. It can be damped from the pipe part 210 of, and due to this damping effect, the strength and durability of the bearing housing 200 can be improved.

The resin layer 400 is composed of a mixture of polyketone, polypropylene, or polyethylene terephthalate and glass fibers in a ratio of 7 to 9: 3 to 1, specifically, selected from among polyketone, polypropylene, and polyethylene terephthalate. It is preferable that any one component and glass fibers are mixed in a ratio of 7:3 to 9:1 to complement each other.

Therefore, as described above, the surfaces of the bearing housing 200 and the bearing shaft 100 are formed in a state where the carbon fiber layer 300 and the resin layer 400 are covered, thereby improving durability and strength due to vibration generated during operation of the drum washing machine. It can be improved, and corrosion of the steel plate material can be prevented.

In addition, by reducing the weight of the bearing housing assembly of the drum washing machine, the weight of the entire set of the drum washing machine can be greatly reduced to improve quality and significantly contribute to cost reduction by reducing material costs.

Although the present invention has been described in detail through specific examples, this is for explaining the present invention in detail, the present invention is not limited thereto, and within the technical spirit of the present invention, by those skilled in the art It is clear that modifications and improvements are possible.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific protection scope of the present invention will be clarified by the appended claims.

100: bearing shaft 110: shaft
120: flange part 121: hub part
122: bead 123: bridge part
124: mounting bracket 125: bending bracket
200: bearing housing 210: pipe
211: expansion part 212: through hole
220: reinforcement part 221: ring body
222: reinforcement wing 223: concavo-convex
224: through hole 300: fiber layer
400: resin layer

Claims (4)

A reinforcing structure of a bearing housing assembly for a drum washing machine including a bearing shaft having a flange portion coupled to the drum, a shaft portion provided to protrude from the flange portion, and a bearing housing into which the shaft portion of the bearing shaft is rotatably inserted and coupled,
The flange portion of the bearing shaft includes a hub portion in which a shaft portion protrudes from its center and a bridge portion provided to protrude outward from the hub portion, but the hub portion is formed to have a thicker thickness than the bridge portion, while a bead is formed on the surface of the hub portion. are provided;
The bearing housing includes a pipe portion into which the axis of the bearing shaft is inserted and coupled therethrough, and a reinforcement portion coupled to the pipe portion, the reinforcement portion including a ring body inserted into the pipe portion and provided, and reinforcing wings provided to protrude outward from the ring body, , unevenness is formed on the surface of the reinforcing wing;
A bearing for a drum washing machine in which a fiber layer made of carbon fiber is provided on the bearing shaft and the bearing housing, and a resin layer made of a mixture of polyketone, polypropylene, or polyethylene terephthalate and glass fiber surrounds the bearing shaft and the bearing housing, including the fiber layer. Reinforced structure of the housing assembly. delete According to claim 1,
The bridge part is provided in combination with the drum,
The bridge part has a mounting bracket that is cut and erected from the surface, and at the end of the bridge part spaced apart from the mounting bracket, "

"A bending bracket formed by bending in a ruler shape is provided,
A reinforcing structure of a bearing housing assembly for a drum washing machine provided to be coupled and fixed with a fastening means penetrating the bending bracket and the mounting bracket in a state in which the drum is inserted between the mounting bracket and the bending bracket. delete

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