KR20220110012A - Bearing housing for drum washing machine - Google Patents

Abstract

An objective of the present invention is to provide a reinforcing structure of the bearing housing assembly for the drum washing machine, which can greatly contribute to cost reduction. The present invention relates to a reinforcing structure of a bearing housing assembly for a drum washing machine, comprising: a flange unit coupled to a drum; a bearing shaft having a shaft unit provided to protrude from the flange unit; and a bearing housing into which an axial unit of the bearing shaft is rotationally inserted and coupled. According to the present invention, a fiber layer made of a carbon fiber is provided on the bearing shaft and the bearing housing. A resin layer in which polyketone, polypropylene, or polyethylene terephthalate and a glass fiber are mixed is provided to surround the bearing shaft and the bearing housing, including the fiber layer.

Description

Reinforcement structure of a bearing housing assembly for a 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 the bearing housing and bearing shaft included in the bearing housing assembly of the drum washing machine, to reduce the weight of the corresponding parts, and to It relates to a reinforcing structure of a bearing housing assembly for a drum washing machine, which can significantly contribute to cost reduction by reducing the weight of a set) and improving the quality as well as reducing material costs.

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

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

In the conventional drum washing machine disclosed in Republic of Korea Registration No. 20-0436462, as shown in FIG. 1 , 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.

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

A drive shaft 6 is installed behind the drum 3, and a drum pulley 7 is installed and used at the rear end of the drive shaft 6, and the drum pulley 7 is a motor through a belt 8, which is a power transmission element. It is connected to the motor pulley (5) connected to (4) and rotates.

Meanwhile, a suspension spring 9 for 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 peripheral 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 the 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 in order to correct an imbalance in weight due to components formed in the rear portion of the tub 2 , and the drum 3 is located at the center of the rear portion of the tub 2 . ) The bearing housing 13, which is installed by press-fitting the bearing 12 to which the drive shaft 6 installed at the rear penetrates and is coupled, is insert-injected and integrally formed.

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

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

To explain 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. At this time, the bearing 12 is press-fitted so that it can be installed. 12) It is manufactured to have the same inner diameter as the outer diameter.

In order to use the bearing housing 13 configured as described above, first, a bearing housing 13 having a rotation prevention groove 14 and a separation prevention groove 15 on the outer peripheral surface, an engineering plastic 20 containing an inorganic pillar, and a tub 2 ), 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 molded by insert-injection into the tub 2 .

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

As such, the bearing housing 13 and the driving shaft 6 inserted therein (corresponding to the “bearing shaft” in the present invention) collide with each other due to the vibration generated during operation of the drum washing machine. There is this.

Republic of Korea Registered Utility Model No. 20-0436462

Therefore, the present invention has been devised to solve the problems of the prior art as described above, and the strength of the bearing housing and the bearing shaft by providing a fiber layer and a resin layer on the bearing housing and the bearing shaft of the bearing housing assembly of the drum washing machine A drum washing machine that can prevent corrosion while reinforcing durability, reduce the weight of the relevant parts, and largely reduce the weight of the entire drum washing machine to improve quality and reduce material costs, thereby greatly contributing to cost reduction. An object of the present invention is to provide a reinforcing structure of a bearing housing assembly for use.

According to the present invention for achieving the above object, the reinforcement structure of the bearing housing assembly for a drum washing machine includes a bearing shaft having a flange coupled to the drum, a shaft protruding from the flange, and a rotatable shaft of the bearing shaft. A reinforcing structure of a bearing housing assembly for a drum washing machine including a bearing housing inserted and coupled to each other. Alternatively, a resin layer in which polyethylene terephthalate and glass fibers are mixed may be provided to surround.

And, the flange portion of the bearing shaft includes a hub portion having a shaft portion protruding from the center thereof, and a bridge portion provided to protrude outward from the hub portion, wherein the hub portion is formed to have a thicker thickness than the bridge portion, while on the surface of the hub portion A bead 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 from the surface and is provided, and the end of the bridge part spaced apart from the mounting bracket is "

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

In addition, the bearing housing includes a pipe part through which the shaft of the bearing shaft is inserted and coupled thereto, and a reinforcement part provided to be coupled to the pipe part, wherein the reinforcement part includes a ring body provided by being inserted into the pipe part, and reinforcing wings provided to protrude outward from the ring body. Including, irregularities 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 and a resin layer made of carbon fiber are provided on the surfaces of the bearing housing and the bearing shaft of the bearing housing assembly of the drum washing machine, so that the bearing housing and the bearing shaft are separated. In addition to improving strength and durability, there is an effect of preventing corrosion thereof.

1 is a block 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 conventional bearing housing is inserted.
5 is an enlarged view of part A of FIG. 4 .
6 is a coupling view 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;
FIG. 9 is an enlarged configuration diagram of part “A” of FIG. 6 .
10 is a view showing the coupling of the bearing housing according to the present invention.
11 is an exploded view of a 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 the functions in the present invention, which may vary depending on the intention or custom of the user or operator, so the definitions of these terms correspond to the technical matters 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 merely exemplary matters of the constituent elements presented in the claims of the present invention, and are included in the technical spirit throughout the specification of the present invention and the scope of the claims. It is an embodiment including a substitutable component as an equivalent in the component.

In addition, optional terms in the examples below are used to distinguish one component from other components, and the components are not limited by the terms.

Accordingly, 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 views showing a bearing shaft and a bearing housing according to the present invention.

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

As shown in FIGS. 6 to 11 , the 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 fixedly coupled to one side thereof, and the bearing housing 200 is coupled to 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 be fixed to 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 washing and dehydration of laundry.

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

The hub portion 121 has protrusions protruding from its outer circumferential surface while maintaining equal intervals, and a bridge portion 123 is coupled to the protrusions of the hub portion 121 to be provided.

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

It is possible to improve the rigidity and durability against torsion or bending acting on the hub portion 121 connected to the bridge portion 123 by the bead 122 as described above.

On the other hand, the bridge part 123 may be coupled and fixed to the protrusion end of the hub part 121 through fixing means such as riveting, bolting, welding, etc., but in this embodiment, the bridge part ( 123) is exemplified as an example of a structure that is coupled and fixed by riveting in an overlapping state.

The bridge portion 123 is formed to have a thinner thickness than the hub portion 121, specifically, the hub portion 121 is formed to a thickness of 3T (the total thickness of the hub portion 121 including the protrusion) while the bridge The portion 123 may be formed to a thickness of 2T, thereby saving material.

"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, the bridge part 123 has a fastening part formed at its end, as shown in FIG. 9, and this fastening part is cut off from the surface of the bridge part 123 and erected vertically with a mounting bracket 124 and a mounting bracket ( 124) and at the end of the separated bridge part 123 "

It includes a bending bracket 125 bent in a "shape", and the bending bracket 125 and the mounting bracket 124 have fastening holes through which the fastening bolts are coupled so as to coincide with each other on the same line.

As a result, the drum 3 is seated between the mounting bracket 124 and the bending bracket 125 as a fastening bolt passing through the bending bracket 125 and the mounting bracket 124, thereby being coupled and fixed with the bearing shaft 100 and As the drum 3 rotates together, washing and dehydration are performed.

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

The fiber layer 300 may be provided over the entire surface of the flange portion 120 , but is transmitted through the bearing shaft 100 even if provided only on one surface of the flange portion 120 with the shaft portion 110 connected to the driving means. It has the strength and durability to absorb the vibration force.

The carbon fiber layer 300 is firmly provided by being adhesively fixed to one surface of the flange part 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 surround 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 or polypropylene or polyethylene terephthalate and glass fiber in a ratio of 7 to 9: 3 to 1.

In particular, polyketone is widely used as a plastic material to replace metal because it has good resistance to heat, friction, impact, and chemicals.

Polypropylene has good fluidity and dimensional stability during molding, is shiny, has good chemical resistance, has excellent bending fatigue resistance, and has the highest density and heat resistance among plastics for legal use. have characteristics.

Polyethylene terephthalate (PET) is a relatively dense polyester resin. It is a crystalline or amorphous thermoplastic plastic. It has high hardness, rigidity and strength, and excellent thermal properties such as creep strength and low water absorption. It has the characteristics 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 since waste resin discarded in daily life can be recycled, it is eco-friendly and new Eco-friendly energy that not only saves cost while maintaining the same strength and durability characteristics as when using the resin of There are savings advantages.

In addition, glass fiber has good flame retardancy, no water absorption, little hygroscopicity, does not corrode due to excellent chemical durability, and has excellent strength, particularly tensile strength, low elongation, and large electrical insulation. It has low abrasion resistance and has good insulation and sound insulation properties.

These glass fibers, together with the above-mentioned resin, improve the strength and durability of the bearing shaft 100 and the bearing housing 200 to be described later, while preventing bending and shrinkage. When the mixing ratio of glass fibers is less than 1, the resin The content of glass fiber is too low compared to the content, so the required strength and durability cannot be secured, and the flexural strength and shrinkage strength cannot be maintained. characteristics cannot be preserved.

Therefore, it is preferable that any one component selected from among the components having the above characteristics, polyketone, polypropylene, and polyethylene terephthalate, and glass fiber are mixed in a ratio of 7:3 to 9:1 to complement each other.

Meanwhile, the bearing housing 200 is provided on one surface of the bearing shaft 100 so that the shaft portion 110 of the bearing shaft 100 is rotatably coupled therethrough.

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

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

Accordingly, the shaft portion 110 of the bearing shaft 100 that is through-coupled to the tube portion 210 can rotate smoothly without frictional resistance with the tube portion 210 by the bearing.

And, a plurality of through-holes 212 are formed on the surface of the pipe part 210, and the through-holes 212 are passages through which the injection molding of the resin layer 400, which will be described later, passes. By this, the resin layer 400 is molded to evenly cover the entire surface of the pipe part 210 , 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 extension 211 of the pipe part 210 and reinforcing wings 222 provided to protrude outward from the outer surface of the ring body 221 .

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

The reinforcing wing 222 is an iron plate made of carbon steel (SM45C)) or spring steel, and as shown in FIG. is formed long from the inner side of the reinforcing blade 222 to the outer side of the reinforcing blade 222.

Accordingly, it is possible to improve the rigidity and durability against torsion or bending acting on the reinforcing blade 222 .

In addition, a plurality of through-holes 224 are formed on the surface of the reinforcing wings 222 as described above, and the epoxy applied to the through-holes 224 to adhere the fiber layer 300 to the reinforcing wings 222 . By introducing the adhesive, it is possible to fix the fiber layer 300 to the reinforcing wing 222 with a strong adhesive force.

Of course, the resin layer 400 is molded into the through hole 224 in a state in which the injection of the resin layer 400 to be described later as well as the epoxy adhesive is introduced into the resin layer 400 so that the resin layer 400 can be firmly molded. .

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

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 are given to describe them. .

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

In addition, the carbon fiber layer 300 is adhesively fixed to one surface of the reinforcing wing 222 as an epoxy resin to be firmly attached to the reinforcing wing 222 of the iron plate, which is a release material.

In addition, the resin layer 400 has the same configuration as the resin layer 400 described for the bearing shaft 100 described above, and is injected to cover the reinforcing wings 222 provided with the carbon fiber layer 300 as well as 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 tube portion 210 through the through hole 212 of the tube portion 210 , thereby providing vibration caused by the driving of the bearing shaft 100 to the bearing housing 200 . It is possible to attenuate from the pipe portion 210 of the, it is possible to improve the strength and durability of the bearing housing 200 due to this damping effect.

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

Therefore, as described above, the surface of the bearing housing 200 and the bearing shaft 100 is formed with the carbon fiber layer 300 and the resin layer 400 covered, thereby improving durability and strength due to vibration generated during operation of the drum washing machine. It can be improved, and it is possible to prevent corrosion of the steel plate material.

In addition, by reducing the weight of the bearing housing assembly of the drum washing machine, it can greatly contribute to cost reduction by reducing the weight of the drum washing machine as a whole, thereby improving the quality and reducing the material cost.

Although the present invention has been described in detail through specific examples, it is intended to describe the present invention in detail, and the present invention is not limited thereto, and by those of ordinary skill in the art within the technical spirit of the present invention. It is clear that the modification or improvement is possible.

All simple modifications and variations 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 portion 121: hub portion
122: bead 123: bridge part
124: mounting bracket 125: bending bracket
200: bearing housing 210: pipe
211: extension 212: through hole
220: reinforcing part 221: ring body
222: reinforcing wing 223: uneven
224: through hole 300: fiber layer
400: resin layer

Claims (4)

A reinforcing structure of a bearing housing assembly for a drum washing machine, comprising: a flange coupled to the drum; a bearing shaft having a shaft provided to protrude from the flange; and a bearing housing into which the shaft of the bearing shaft is rotatably inserted and coupled;
The bearing shaft and bearing housing are provided with a fiber layer made of carbon fiber, and the bearing shaft and bearing housing including the fiber layer are provided with a resin layer mixed with polyketone or polypropylene or polyethylene terephthalate and glass fiber to cover the bearing for a drum washing machine. Reinforcement structure of the housing assembly. The method according to claim 1,
The flange portion of the bearing shaft includes a hub portion having a shaft portion protruding from the center thereof, and a bridge portion provided to protrude outward from the hub portion, wherein 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 Reinforcement structure of a bearing housing assembly for a drum washing machine. 3. The method according to claim 2,
The bridge part is provided in combination with the drum,
In the bridge part, there is a mounting bracket that is cut off from the surface and is provided, and at the end of the bridge part spaced from the mounting bracket, "

"A bending bracket bent in a shape is provided,
A reinforcing structure of a bearing housing assembly for a drum washing machine that is provided to be fixedly coupled 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. The method according to claim 1,
The bearing housing includes a tube portion through which the shaft portion of the bearing shaft is inserted and coupled therethrough, and a reinforcing portion provided by being coupled to the tube portion,
The reinforcing part includes a ring body provided to be fitted into the pipe part, and reinforcing wings provided to protrude outward from the ring body,
A reinforcing structure of a bearing housing assembly for a drum washing machine in which irregularities are formed on the surface of the reinforcing wing.

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