KR20100008144A - Drum type washing machine bearing housing - Google Patents

Drum type washing machine bearing housing Download PDF

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Publication number
KR20100008144A
KR20100008144A KR1020080068564A KR20080068564A KR20100008144A KR 20100008144 A KR20100008144 A KR 20100008144A KR 1020080068564 A KR1020080068564 A KR 1020080068564A KR 20080068564 A KR20080068564 A KR 20080068564A KR 20100008144 A KR20100008144 A KR 20100008144A
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KR
South Korea
Prior art keywords
bearing housing
metal pipe
washing machine
bearing
engineering plastic
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KR1020080068564A
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Korean (ko)
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양덕수
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양덕수
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Priority to KR1020080068564A priority Critical patent/KR20100008144A/en
Publication of KR20100008144A publication Critical patent/KR20100008144A/en

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/26—Casings; Tubs
    • D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
    • D06F37/269—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups for the bearing of the rotary receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14467—Joining articles or parts of a single article
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/02—Rotary receptacles, e.g. drums
    • D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • D06F37/22—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a horizontal axis
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/26—Casings; Tubs
    • D06F37/261—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements
    • D06F37/262—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements made of plastic material, e.g. by injection moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14467—Joining articles or parts of a single article
    • B29C2045/14524—Joining articles or parts of a single article making hollow articles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Abstract

PURPOSE: A bearing housing for a drum washing machine is provided to produce the bearing housing in large amounts by reducing the production cost and lightening the weight. CONSTITUTION: A bearing housing for a drum washing machine(100) is composed of metal pipes(110). Multiple passages are formed between metal pipes at uniform intervals. The metal pipes are insert-injected in engineering plastics. After the metal pipes are injected, the engineering plastics and the metal pipes are integrally molded through the passages.

Description

드럼세탁기용 베어링하우징{Drum type washing machine bearing housing}Bearing housing for drum washing machine {Drum type washing machine bearing housing}

본 발명은 베어링하우징에 관한 것으로, 더욱 상세하게는 금속 파이프로 이루어진 베어링하우징을 엔지니어링 플라스틱에 인서트 사출하고, 인서트 사출된 금속파이프와 베어링하우징은 통로를 통하여 일체로 사출 성형될 수 있도록 한 드럼세탁기용 베어링하우징에 관한 것이다.The present invention relates to a bearing housing, and more particularly, to insert a bearing housing made of a metal pipe into an engineering plastic, and to insert the injected metal pipe and the bearing housing to be integrally injection molded through a passage. Bearing housing.

일반적으로 드럼세탁기의 세탁방식은 세제, 세탁수 및 세탁물이 드럼 내에 투입된 상태에서 모터의 구동력을 전달받아 회전하는 드럼과 세탁물의 마찰력을 이용하여 세탁을 행하는 방식으로서, 세탁물의 손상이 거의 없고, 세탁물이 서로 엉키지 않으며, 두드리고 비벼빠는 세탁효과를 얻을 수 있다.In general, the washing method of the drum washing machine is a method of washing by using the friction force of the rotating drum and the laundry by receiving the driving force of the motor while the detergent, the washing water and the laundry are put in the drum. These do not get tangled with each other, tapping and rubbing can achieve the washing effect.

이러한 세탁효과를 갖는 종래 드럼세탁기의 구성을 간단하게 살펴보면 드럼세탁기는 도1에서와 같이 캐비닛(1) 내측에 원통형의 터브(2)가 설치되어 있고, 이 터브(2) 내측에는 원통형의 드럼(3)이 회전 가능하게 설치되어 있다.Looking at the configuration of a conventional drum washing machine having such a washing effect briefly, the drum washing machine is provided with a cylindrical tub (2) inside the cabinet (1), as shown in Figure 1, the tub (2) inside the cylindrical drum ( 3) is rotatably installed.

상기한 터브(2)의 하단 일측에는 드럼(3)을 회동시키기 위한 구동수단으로 모터(4)가 설치되어 있으며, 모터(4)에는 모터 풀리(5)가 연결 사용된다.One end of the tub 2 is provided with a motor 4 as a driving means for rotating the drum 3, and the motor 4 is used to connect the motor pulley 5.

드럼(3) 후방에는 구동축(6)이 설치되고, 이러한 구동축(6) 후단에는 드럼 풀리(7)가 설치 사용되는데, 이 드럼 풀리(7)는 동력전달요소인 벨트(8)을 매개로 모터(4)에 연결된 모터 풀리(5)와 연결되어 회동하게 된다.A drive shaft 6 is installed at the rear of the drum 3, and a drum pulley 7 is installed at the rear end of the drive shaft 6, and the drum pulley 7 is a motor driven by a belt 8 as a power transmission element. It is connected to the motor pulley (5) connected to (4) to rotate.

한편 캐비닛(1) 상부면 내측과 터브(2) 외주면 상부측 사이에는 터브(2)를 지지하는 서스펜션 스프링(9)이 설치되고, 상기 캐비닛(1) 하부면 내측과 터브(2) 하부측 사이에는 탈수시 발생하는 터브(2)의 진동을 감쇠시키기 위한 댐퍼(10)가 설치된다.Meanwhile, a suspension spring 9 for supporting the tub 2 is installed between the inside of the upper surface of the cabinet 1 and the upper side of the outer peripheral surface of the tub 2, and between the inside of the lower surface of the cabinet 1 and the lower side of the tub 2. In the damper 10 is provided for damping the vibration of the tub (2) generated during dehydration.

터브(2)의 전방 외주면에는 터브(2) 후방부에 형성되는 구성요소들에 의한 무게의 불균형을 보정하기 위하여 웨이트밸런스(11)가 설치되고, 터브(2)의 후방부 중심부에는 상기 드럼(3)의 후방에 설치된 구동축(6)이 관통하면서 결합하는 베어링(12)이 압입되어 설치되는 베어링하우징(13)이 형성되어 있다.A weight balance 11 is installed on the front outer circumferential surface of the tub 2 in order to correct an unbalance in weight due to the components formed at the rear of the tub 2, and at the center of the rear portion of the tub 2, the drum ( A bearing housing 13 is formed in which a bearing 12 to which the drive shaft 6 provided at the rear of 3) penetrates and engages is press-fitted.

이와 같이 구성된 종래 베어링하우징의 재질이 다이캐스팅일 경우에는 가공이 어렵고 가동시간도 많이 걸려 생산성이 낮아 단가를 높이는 요인이 되고 초기 가공을 억지끼움식으로 하여 베어링(12)을 압입하여도 일정 온도 이상이 되면, 베어링과의 열변형량의 차이로 인하여 베어링이 베어링하우징 내에서 헐거워지는 단점이 있었다.When the material of the conventional bearing housing configured as described above is die-casting, it is difficult to process and takes a lot of operating time, resulting in low productivity due to low productivity. In this case, the bearing may be loosened in the bearing housing due to the difference in thermal strain from the bearing.

또한, 베어링하우징의 재질을 주물로 하는 경우에는 주형시 변형량이 커서 큰 가공여유를 가져야 하므로 정확한 치수로 제작하기 어려울 뿐 아니라, 급랭에 따라 표면강화, 기공 등이 발생하게 되므로 가공이 어렵고, 가공시간도 많이 소요되어 가공비가 증가되는 단점이 있었다.In addition, in case of casting material of bearing housing, it is difficult to manufacture with accurate dimension because the deformation amount is large when casting, and it is difficult to manufacture with accurate dimension. Also, it is difficult to process because surface hardening and pore occur due to rapid cooling. It also took a lot of disadvantages that the processing cost increases.

특히, 상기와 같은 베어링하우징은 모두 가공방법이 복잡하기 때문에 생산원 가가 상승될 뿐 아니라, 중량이어서 운반시 많이 힘이 드는 단점이 있으며, 대량 생산하기 어렵다는 제반 문제점이 발생되었다.In particular, all of the bearing housings as described above not only increase the production cost because the processing method is complicated, but also has a disadvantage that it is difficult to carry a lot because of the weight, it is difficult to mass production.

본 발명의 목적은 상기와 같은 제반 문제점을 감안하여 안출한 것으로 금속 파이프로 이루어진 베어링하우징을 엔지니어링 플라스틱에 인서트 사출 하므로써, 생산원가는 절감되고 중량은 가벼워 운반하기 편리하며 대량 생산을 할 수 있도록 한 드럼세탁기용 베어링하우징을 제공하는 데 있다.The object of the present invention is to solve the problems described above, by inserting the bearing housing made of metal pipes into the engineering plastic, the production cost is reduced, the weight is light, convenient to transport and mass production drum To provide a bearing housing for a washing machine.

본 발명의 다른 목적은 금속 파이프가 엔지니어링 플라스틱에 인서트 사출될 때 통로를 통하여 상기한 엔지니어링 플라스틱이 금속 파이프의 내외벽에 충진되게 하므로써, 드럼 세탁기 사용시 뜨거운 물과 세제 사용에 따른 악조건 환경에서 엔지니어링 플라스틱과 금속 파이프간의 서로 다른 선팽창계수에 의한 분리(금속재질과 플라스틱 재질)가 일어나지 않게 엔지니어링 플라스틱과 금속 파이프가 일체로 연결될 수 있도록 한 드럼세탁기용 베어링하우징을 제공하는 데 있다.Another object of the present invention is to allow the above-mentioned engineering plastics to be filled in the inner and outer walls of the metal pipes through the passages when the metal pipes are insert-injected into the engineering plastics. An object of the present invention is to provide a bearing housing for a drum washing machine in which an engineering plastic and a metal pipe can be connected integrally so that separation due to different linear expansion coefficients between metal pipes (metal and plastic) does not occur.

본 발명은 상기와 같은 목적을 달성하기 위한 수단으로 베어링하우징을 제조시 금속 파이프로 형성하고 이 금속 파이프 중간에는 일정한 간격을 두고 다수의 통로를 형성한 후, 상기 금속 파이프가 엔지니어링 플라스틱에 인서트 사출되고 사출된 후에는 통로를 통하여 엔지니어링 플라스틱과 금속 파이프가 일체로 사출 성형되게 하는 것을 특징으로 하는 그 기술적 구성상의 기본 특징으로 한다.The present invention is a means for achieving the above object by forming a bearing housing as a metal pipe in the manufacturing process and after forming a plurality of passages at regular intervals in the middle of the metal pipe, the metal pipe is insert injection into the engineering plastic After injection, it is a basic feature of the technical construction, characterized in that the engineering plastic and the metal pipe are integrally injection molded through the passage.

이상에서 살펴본 바와 같이 본 발명에 따르면, 금속 파이프로 이루어진 베어 링하우징이 엔지니어링 플라스틱에 인서트 사출되기 때문에 생산원가는 절감되고 중량은 가벼워 운반하기 편리하며 대량 생산을 할 수 있는 것이다.As described above, according to the present invention, since the bearing housing made of the metal pipe is inserted into the engineering plastic, the production cost is reduced, the weight is light, convenient to transport, and mass production.

또한, 금속 파이프가 엔지니어링 플라스틱에 인서트 사출될 때 통로를 통하여 상기한 엔지니어링 플라스틱이 금속 파이프의 내외벽에 충진되기 때문에 엔지니어링 플라스틱과 금속 파이프가 일체로 연결되는 것이다.In addition, since the engineering plastic is filled in the inner and outer walls of the metal pipe through the passage when the metal pipe is inserted into the engineering plastic, the engineering plastic and the metal pipe are integrally connected.

또한, 엔지니어링 플라스틱과 일체로 연결된 금속 파이프는 엔지니어링 플라스틱에서 분리되거나 회전되는 것이 방지되어 제 기능을 계속적으로 수행 가능하기 때문에 제품 수명이 연장되는 등의 효과가 있는 것이다.In addition, the metal pipes integrally connected with the engineering plastics are prevented from being separated or rotated from the engineering plastics so that they can continuously perform their functions, thereby extending the life of the product.

이하 본 발명의 바람직한 실시예를 첨부도면을 참조하여 보다 상세하게 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도2는 본 발명에 따른 금속 파이프의 사시도 이고, 도3은 본 발명에 따른 베어링하우징이 엔지니어링 플락스틱에 인서트된 상태를 나타낸 사시도이다.Figure 2 is a perspective view of a metal pipe according to the present invention, Figure 3 is a perspective view showing a state in which the bearing housing according to the invention is inserted into the engineering plastic.

본 발명의 베어링하우징(100)도 구동축이 회동하도록 내부에 베어링이 압입되어 사용되는 것은 종래와 같다. 따라서 이하에서는 드럼세탁기의 전체적인 구성 및 베어링하우징(100)의 기능은 통상 사용되는 기술 내용이고 본 발명에서 권리로서 등록받고자 하는 사항과는 무관하므로 그에 대한 구체적인 설명은 생략하기로 한다.Bearing housing 100 of the present invention is also used as the bearing is pressed in the interior so that the drive shaft is rotated as in the prior art. Therefore, hereinafter, the overall configuration of the drum washing machine and the function of the bearing housing 100 are generally used technical contents and are not related to the matter to be registered as a right in the present invention, so a detailed description thereof will be omitted.

다만, 본 발명은 더욱 효과적으로 베어링하우징을 사용할 수 있도록 한 것으로, 이는 도2와 도3에서와 같이 베어링하우징(100)은 금속재질의 금속 파이프(110) 로 형성되는 기본 구성을 갖는다.However, the present invention allows the bearing housing to be used more effectively, which has a basic configuration in which the bearing housing 100 is formed of a metal pipe 110 made of metal, as shown in FIGS. 2 and 3.

베어링하우징(100)을 제조시 금속 파이프(110)로 형성하고 이 금속 파이프(110) 중간에는 일정한 간격을 두고 다수의 통로(120)를 형성한 후, 상기 금속 파이프(110)가 엔지니어링 플라스틱(300)에 인서트 사출되고 사출된 후에는 통로(120)를 통하여 엔지니어링 플라스틱(300)과 금속 파이프(110)가 일체로 사출되며, 이것들은 다시 터브(400)에 인서트 사출되는 구성을 갖는다.After forming the bearing housing 100 as a metal pipe 110 and forming a plurality of passages 120 at regular intervals in the middle of the metal pipe 110, the metal pipe 110 is an engineering plastic 300 After insert injection and injection into the injection), the engineering plastics 300 and the metal pipe 110 are integrally injected through the passage 120, and these are insert injection into the tub 400 again.

상기한 금속 파이프(110)의 내부 상하단에는 베어링(도시하지 않음)이 장착될 수 있도록 베어링안착부(200)가 형성된다.Bearing seats 200 are formed at upper and lower ends of the metal pipe 110 so that bearings (not shown) may be mounted.

이를 더욱 상세하게 설명하면 베어링하우징(100)은 베어링이 내부에 억지끼움될 수 있도록 내경을 갖는 금속 파이프(110) 형태로 형성되는데, 이때 베어링이 꼭맞게 압입되어 장착될 수 있도록 상기한 베어링 외경과 일치되도록 내경에는 베어링안착부(200)가 형성된다.To describe this in more detail, the bearing housing 100 is formed in the form of a metal pipe 110 having an inner diameter so that the bearing can be fit inside, wherein the bearing outer diameter and the bearing can be pressed in and fitted. The bearing seating portion 200 is formed in the inner diameter to match.

이와 같이 구성된 본 발명을 사용하기 위해서는 먼저 금속 파이프(110)로 이루어진 베어링하우징(100)을 엔지니어링 플라스틱(300)에 인서트 사출한다. 이때 엔지니어링 플라스틱(300)에 인서트 사출되는 베어링하우징(100) 즉, 금속 파이프(110)에는 통로(120)가 형성되어 있기 때문에 인서트 사출 성형시 금속 파이프(110) 내,외벽에 엔지니어링 플라스틱(300)이 충진되어 일체로 사출 성형되는 것이다.In order to use the present invention configured as described above, the bearing housing 100 made of the metal pipe 110 is first injected into the engineering plastic 300. In this case, since the passage 120 is formed in the bearing housing 100 that is insert-inserted into the engineering plastic 300, that is, the metal pipe 110, the engineering plastic 300 is formed on the inner and outer walls of the metal pipe 110 during the insert injection molding. This is filled and integrally injection molded.

한편, 베어링하우징(100)이 엔지니어링 플라스틱(300)에 일체로 인서트 사출되면 이것들은 다시 터브(400)에 인서트 사출된다.On the other hand, when the bearing housing 100 is insert injection integrally to the engineering plastic 300, they are insert injection into the tub 400 again.

상기와 같은 상태의 인서트물을 드럼세탁기에 장착하고 베어링하우징(100) 내부에 형성된 베어링안착부(200)에 베어링을 억지 끼움한 상태에서 세탁을 실시하면 드럼내의 세탁물에 의해 편심하중이 발행하고, 이 편심하중이 구동축 및 베어링에 전달되더라도 베어링하우징(100)은 통로(120)를 통하여 엔지니어링 플라스틱(300)과 일체로 인서트 사출되어 있기 때문에 베어링하우징(100)이 회전되거나 엔지니어링 플라스틱(300)에서 이탈되지 않는 것이다.When the insert in the above state is mounted in the drum washing machine and the washing is performed while the bearing is inserted into the bearing seat 200 formed in the bearing housing 100, an eccentric load is generated by the laundry in the drum. Although the eccentric load is transmitted to the drive shaft and the bearing, the bearing housing 100 is inserted and injected into the engineering plastic 300 through the passage 120 so that the bearing housing 100 is rotated or released from the engineering plastic 300. It doesn't work.

도1은 종래 드럼세탁기의 구성도.1 is a block diagram of a conventional drum washing machine.

도2는 본 발명에 따른 금속 파이프의 사시도.2 is a perspective view of a metal pipe according to the present invention;

도3은 본 발명에 따른 베어링하우징이 엔지니어링 플락스틱에 인서트된 상태를 나타낸 사시도.Figure 3 is a perspective view showing a state in which the bearing housing according to the invention is inserted into the engineering plastic.

(도면의 주요 부분에 대한 부호의 설명)(Explanation of symbols for the main parts of the drawing)

100 ; 베어링하우징 110 ; 금속 파이프100; Bearing housing 110; Metal pipe

120 ; 통로 200 ; 베어링안착부120; Passage 200; Bearing seat

300 ; 엔지니어링 플라스틱 400 ; 터브300; Engineering plastics 400; Tub

Claims (1)

베어링하우징(100)을 제조시 금속 파이프(110)로 형성하고 이 금속 파이프 중간에는 일정한 간격을 두고 다수의 통로를(120) 형성한 후, 상기 금속 파이프(120)가 엔지니어링 플라스틱(300)에 인서트 사출되고 사출된 후에는 통로(120)를 통하여 엔지니어링 플라스틱(300)과 금속 파이프(110)가 일체로 사출 성형되게 하는 것을 특징으로 하는 드럼세탁기용 베어링하우징.After forming the bearing housing 100 as a metal pipe 110 and forming a plurality of passages 120 at regular intervals in the middle of the metal pipe, the metal pipe 120 is inserted into the engineering plastic 300. After injection and injection, the bearing housing for a drum washing machine, characterized in that the engineering plastic 300 and the metal pipe 110 is integrally injection molded through the passage (120).
KR1020080068564A 2008-07-15 2008-07-15 Drum type washing machine bearing housing KR20100008144A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101419798B1 (en) * 2013-06-05 2014-07-15 미르하이텍 주식회사 Bearing housing for drum-washer tub and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101419798B1 (en) * 2013-06-05 2014-07-15 미르하이텍 주식회사 Bearing housing for drum-washer tub and method

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