KR0136038Y1 - A supporting structure of a shaft in a washing machine - Google Patents

A supporting structure of a shaft in a washing machine Download PDF

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Publication number
KR0136038Y1
KR0136038Y1 KR2019960013841U KR19960013841U KR0136038Y1 KR 0136038 Y1 KR0136038 Y1 KR 0136038Y1 KR 2019960013841 U KR2019960013841 U KR 2019960013841U KR 19960013841 U KR19960013841 U KR 19960013841U KR 0136038 Y1 KR0136038 Y1 KR 0136038Y1
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KR
South Korea
Prior art keywords
rotating
rotating shaft
tub
washing machine
bearing
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Application number
KR2019960013841U
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Korean (ko)
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KR970062453U (en
Inventor
이금찬
Original Assignee
김광호
삼성전자주식회사
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Priority to KR2019960013841U priority Critical patent/KR0136038Y1/en
Publication of KR970062453U publication Critical patent/KR970062453U/en
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Publication of KR0136038Y1 publication Critical patent/KR0136038Y1/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
    • D06F37/20—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
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • D06F37/206—Mounting of motor
    • 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
    • D06F37/30—Driving arrangements 
    • D06F37/40—Driving arrangements  for driving the receptacle and an agitator or impeller, e.g. alternatively
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings

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

Abstract

본 고안은 세탁기의 회전축 지지구조에 관한 것으로, 그 목적은 회전시 발생하는 마찰소음을 저감하고, 편심 하중의 발생시 이에 탄성력을 발휘하여 펀심 하중이 빠른 시간내에 소멸되도록 하는 것이다.The present invention relates to a support structure for a rotating shaft of a washing machine, the purpose of which is to reduce the friction noise generated during rotation, and to exhibit an elastic force when the eccentric load is generated so that the puncture load is quickly dissipated.

본 고안은, 회전하여 세탁이나 탈수를 행하는 회전조(30), 회전조(30)를 구동하기 위한 모터(14), 모터(14)의 회전력을 회전조(30) 전달하는 회전축(40), 회전축(40)을 회전가능하게 지지하는 베어링(51)을 포함하는 세탁기에 있어서, 회전조(30)와 베어링(51)사이의 회전축(40)에는 탄성력을 갖는 마찰방지부재(70)가 설치되어 회전축(40)의 마찰소음과 마모를 저감하는 것이다.The present invention, the rotating tub 30 for rotating and washing or dehydrating, the motor 14 for driving the rotating tub 30, the rotating shaft 40 for transmitting the rotational force of the motor 14, In the washing machine including a bearing 51 for rotatably supporting the rotating shaft 40, the rotating shaft 40 between the rotating tub 30 and the bearing 51 is provided with a friction preventing member 70 having an elastic force is provided It is to reduce the friction noise and wear of the rotary shaft (40).

Description

세탁기의 회전축 지지구조Rotating shaft support structure of washing machine

제1도는 일반적인 드럼세탁기의 내부 구성으로 보인 도면이다.1 is a view showing the internal configuration of a general drum washing machine.

제2도는 종래 회전조를 구동하기 위한 회전축의 지지구조를 보인 단면도이다.2 is a cross-sectional view showing a supporting structure of a rotating shaft for driving a conventional rotating tank.

제3도는 본 고안에 따른 회전축 지지구조가 채용된 드럼세탁기의 내부 구성을 보인 단면도이다.3 is a cross-sectional view showing the internal configuration of a drum washing machine employing a rotating shaft support structure according to the present invention.

제4도는 제2도에 도시된 회전축 지지구조를 확대하여 도시한 도면이다.FIG. 4 is an enlarged view of the rotary shaft support structure shown in FIG.

제5도는 본 고안에 따른 판스프링 마찰방지부재의 발췌사시도이다.5 is an exploded perspective view of the leaf spring friction preventing member according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 본체 20 : 고정조10: main body 20: fixing tank

30 : 회전조 31 : 측면판30: rotating tank 31: side plate

32 : 전면판 33 : 후면판32: front panel 33: rear panel

40 : 회전축 51 : 베어링40: rotating shaft 51: bearing

52 : 하우징 60 : 부시52 housing 60 bush

70 : 마찰방지부재70: friction preventing member

본 고안은 세탁기의 회전축 지지구조에 관한 것으로, 회전축의 마찰부위에 판스프링으로 이루어진 마찰방지부재를 설치함으로써 회전시 편심 하중에 의한 마찰을 저감시키는 세탁기의 회전축 지지구조에 관한 것이다.The present invention relates to a rotating shaft supporting structure of a washing machine, and to a rotating shaft supporting structure of a washing machine to reduce friction caused by an eccentric load during rotation by installing a friction preventing member made of a leaf spring on the friction portion of the rotating shaft.

드럼세탁기는 회전조의 회전에 의하여 발생되는 낙하를 이용하여 세탁물을 두드려 세탁하는 방식으로서, 제1도는 이러한 드럼세탁기의 구성을 보인 도면이다. 이에 도시한 바와 같이, 본체(1)의 내부에는 세탁수를 담수하는 고정조(2)가 설치되고, 고정조(2)의 내부에는 회전하여 세탁과 탈수행정을 수행하는 회전조(3)가 설치된다. 회전조(3)에는 다수의 작은 구멍(4)이 전면에 천공되어 물이 회전조(3)와 고정조(2)를 유동하도록 하며, 탈수시 세탁물에서 원심분리된 물이 고정조(2)로 이탈되도록 한다. 그리고 회전조(3)에는 내측으로 돌출되게 밴딩된 복수개의 수류조절부재(5)가 설치되어 세탁물을 끌어올려 낙하시켜 세탁을 수행한다.Drum washing machine is a method of washing the laundry by tapping the laundry generated by the rotation of the rotating tub, Figure 1 is a view showing the configuration of such a drum washing machine. As shown in the figure, a fixing tank 2 for fresh water for washing is installed in the main body 1, and a rotating tank 3 for rotating washing and dehydrating in the fixing tank 2 is provided. Is installed. The rotating tub 3 has a plurality of small holes 4 perforated in the front to allow the water to flow through the rotating tub 3 and the fixed tub 2, and when dewatered, the water centrifuged from the laundry is fixed tub 2 To escape. In addition, a plurality of water flow adjusting members 5 which are bent to protrude inwardly are installed in the rotary tub 3 to lift and drop the laundry to perform washing.

회전조(3)는 본체(1)의 밑면에 설치된 모터(6)에 의하여 구동되는데, 이를 위하여 회전조(3)의 후면 중앙에 회전축(9)이 결합설치되고, 이 회전축(6)은 고정조(2)를 관통하여 후측으로 돌출된다. 고정조(2)의 후측으로 돌출된 회전조(3)의 후단부에는 풀리(6a)가 설치되고, 풀리(6a)와 모터(6)사이에는 벨트(6b)가 체결되어 모터(6)의 회전력이 회전조(3)로 전달되도록 한다. 이때 회전축(9)과 고정조(2)사이에는 베어링(7)이 설치되어 회전축(9)을 지지하는데, 이러한 베어링(7)은 하우징(8)을 개재하여 고정조(2)에 결합되며, 베어링(7)은 제2도에 도시한 바와 같이, 하우징(8)에 압입되어 결합된다. 베어링(7)은 하우징(8)의 양측단부에 각각 설치되며, 회전조(3)측에 설치된 베어링(7)의 내측에는 회전축(9)과 일체로 회전하는 부시(9a)가 설치되고, 부시(9a)와 하우징(8)사이에는 누수를 방지하기 위한 오일씰(9b)이 설치된다.The rotating tub 3 is driven by a motor 6 installed at the bottom of the main body 1, and for this purpose, the rotating shaft 9 is coupled to the center of the rear surface of the rotating tub 3, and the rotating shaft 6 is fixed. It penetrates the tank 2 and protrudes to the rear side. A pulley 6a is provided at the rear end of the rotating tub 3 protruding to the rear side of the fixing tub 2, and a belt 6b is fastened between the pulley 6a and the motor 6 so that the motor 6 The rotational force is transmitted to the rotating tub (3). At this time, a bearing (7) is installed between the rotating shaft (9) and the fixing tank (2) to support the rotating shaft (9), the bearing (7) is coupled to the fixing tank (2) via a housing (8), The bearing 7 is press-fitted into the housing 8, as shown in FIG. 2. The bearings 7 are respectively provided at both end portions of the housing 8, and a bush 9a that is integrally rotated with the rotation shaft 9 is provided inside the bearing 7 provided on the rotating tub 3 side. An oil seal 9b is installed between the 9a and the housing 8 to prevent leakage.

그러나 이와 같은 종래의 세탁기는 회전조가 세탁물이 편심된 상태에서 고속회전할 경우에 회전축이 편심하중에 의하여 변형되어 부시가 베어링의 회전하지 않는 부위에 직접 마찰됨으로써 금속제인 부시와 베어링사이에서 마찰소음과 마모가 발생되는 문제가 있었다.However, in the conventional washing machine, when the rotating tub rotates at a high speed while the laundry is eccentric, the rotating shaft is deformed by the eccentric load, so that the bush is directly rubbed on the non-rotating part of the bearing. There was a problem that wear occurs.

따라서 본 발명은 상기한 문제를 해결하기 위하여 고안된 것으로, 본 고안의 목적은 회전시 발생하는 마찰소음을 저감할 수 있는 세탁기의 회전축 지지구조를 제공하는 것이다.Therefore, the present invention is designed to solve the above problems, an object of the present invention is to provide a rotating shaft support structure of the washing machine that can reduce the friction noise generated during rotation.

본 고안의 다른 목적은 편심 하중의 발생시 이에 탄성력을 발휘하여 편심 하중이 빠른 시간내에 소멸되도록 하는 것이다.Another object of the present invention is to exert an elastic force when the eccentric load is generated so that the eccentric load disappears in a short time.

상기 목적을 달성하기 위한 본 고안은, 회전하여 세탁이나 탈수를 행하는 회전조, 상기 회전조를 구동하기 위한 모터, 상기 모터의 회전력을 상기 회전조 전달하는 회전축, 상기 회전축을 회전가능하게 지지하는 베어링을 포함하는 세탁기에 있어서, 상기 회전조와 상기 베어링사이의 상기 회전축에는 탄성력을 갖는 마찰방지부재가 설치된 것을 특징으로 하는 구성이다.The present invention for achieving the above object is a rotating tub for rotating or washing or dewatering, a motor for driving the rotating tub, a rotating shaft for transmitting the rotating force of the motor, the bearing for rotatably supporting the rotating shaft In the washing machine comprising a, wherein the rotating shaft between the rotating tank and the bearing is characterized in that the friction preventing member having an elastic force is installed.

또한, 상기 회전축 지지구조에 있어서, 상기 마찰방지부재는 두 개가 서로 대칭되게 마련되어 그 외측으로 갈수록 외경이 축소되는 형태로 마련된 것을 특징으로 하는 구성이다.In addition, in the rotating shaft support structure, the friction preventing member is a configuration characterized in that the two are provided symmetrical with each other provided in the form that the outer diameter is reduced toward the outside.

이하에서는 첨부도면을 참조하여 본 고안의 바람직한 실시예를 상세하게 설명하겠다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

제3도는 본 고안에 따른 베어링 지지구조가 채용된 드럼세탁기의 내부 구성을 보인 도면이다. 이에 도시한 바와 같이, 본체(10)의 내부에는 원통이 누운형상의 고정조(20)가 설치되는데, 고정조(20)의 상측에는 완충스프링(11)이 설치되어 고정조(20)를 본체(10)에 현가시키고, 하측에는 본체(10)의 밑면(13)에 고정된 두 개의 충격흡수기(12)가 설치된다.3 is a view showing the internal configuration of a drum washing machine employing a bearing support structure according to the present invention. As shown in the figure, a fixed tub 20 having a cylindrical shape lying inside the main body 10 is provided, and a buffer spring 11 is installed on the upper side of the fixed tub 20 to fix the fixed tub 20 to the main body. Suspended at 10, two shock absorbers 12 fixed to the bottom surface 13 of the main body 10 are provided.

고정조(20)의 내부에는 회전하여 세탁과 탈수를 행하는 회전조(30)가 설치되는데, 회전조(30)는 본체(10)의 밑면(13)에 고정설치된 모터(14)에 의하여 구동된다. 회전조(30)는 전후양면이 개구된 원통형 측면판(31)과 측면판(31)의 전후면에 결합되는 전면판(32)과 후면판(33)을 포함한다. 후면판(33)에는 그 후단부가 고정조(20)의 외측까지 연장된 회전축(40)의 전단부가 플렌지(41)를 개재하여 결합되는데, 고정조(20)의 후측으로 돌출된 회전축(40)의 후단부에는 풀리(15)가 설치되고, 이 풀리(15)와 모터(14)사이에는 벨트(16)가 체결되어 모터(14)의 회전력이 회전조(30)에 전달되도록 한다.Inside the fixed tub 20, a rotating tub 30 which rotates to wash and dehydrate is installed. The rotating tub 30 is driven by a motor 14 fixed to the bottom surface 13 of the main body 10. . The rotating tub 30 includes a cylindrical side plate 31 having front and rear sides opened and a front plate 32 and a rear plate 33 coupled to the front and rear surfaces of the side plate 31. The rear plate 33 is coupled to the front end of the rotating shaft 40, the rear end of which extends to the outside of the fixing tank 20 via the flange 41, the rotating shaft 40 protruding to the rear side of the fixing tank 20 The rear end of the pulley 15 is installed, the belt 16 is fastened between the pulley 15 and the motor 14 so that the rotational force of the motor 14 is transmitted to the rotating tub (30).

한편 회전조(30)의 측면판(31)에는 전역에는 다수의 작은 구멍(34)이 천공되어 물이 회전조(30)와 고정조(20)의 내부를 연통하도록 하고, 세탁물이 회전조(30)의 내부를 뒹굴도록 한다. 그리고 회전조(30)의 내부에는 내측으로 돌출되게 설치되어 세탁물을 끌어올렸다가 낙하시키는 수류조절부재(35)가 설치된다. 수류조절부재(35)는 회전조(30)의 일부위를 V형태로 내측으로 벤딩하여 이루어지는데, 이러한 수류조절부재(35)는 120°간격으로 배치되며, 회전조(30)의 길이에 상응하게 축방향으로 연장된다.On the other hand, a plurality of small holes 34 are drilled in the side plate 31 of the rotating tub 30 to allow water to communicate with the inside of the rotating tub 30 and the fixing tub 20, and the laundry rotates with the rotating tub ( 30) Let go inside. And the inside of the rotating tub 30 is installed to protrude inward to the water flow adjustment member 35 for lifting and dropping the laundry. The water flow control member 35 is formed by bending a portion of the rotary tub 30 inward in a V shape, and the water flow regulating member 35 is disposed at 120 ° intervals, corresponding to the length of the rotary tub 30. Extend axially.

회전축(40)은 베어링(51)에 의하여 회전지지되는데, 이러한 베어링(51)은 하우징(52)을 개재하여 고정조(20)에 결합된다. 즉, 제4도에 도시한 바와 같이, 베어링(51)은 회전축(40)의 양단부에 각각 설치되고, 하우징(52)은 이들을 함께 감싸 고정에 결합시킨다. 이때 베어링(51)은 그 내측면이 회전축(40)에 밀착되는 내륜(51a)과 외측면이 하우징(52)에 밀착되는 외륜(51b)과 이들사이에 배치된 롤러(51c)를 포함한다.The rotating shaft 40 is rotated by the bearing 51, such a bearing 51 is coupled to the fixing tank 20 via the housing 52. That is, as shown in FIG. 4, the bearings 51 are respectively provided at both ends of the rotation shaft 40, and the housing 52 wraps them together and couples them to the fixing. At this time, the bearing 51 includes an inner ring 51a whose inner surface is in close contact with the rotation shaft 40, an outer ring 51b whose outer surface is in close contact with the housing 52, and a roller 51c disposed therebetween.

그리고, 내측에 위치하는 베어링(51)의 내측 회전축(40)에는 회전축(40)과 일체로 부시(61)가 설치되고, 부시(61)와 내측에 위치하는 베어링(51)사이에는 오일씰(62)이 설치되어 물이 침투하는 것을 방지한다. 그리고 오일씰(62)과 내측에 위치하는 베어링(51)사이에는 회전축(40)의 회전시 발생하는 마찰소음을 방지하기 위하여 탄성력을 갖는 마찰방지부재(70)가 설치된다. 마찰방지부재(70)는 와셔 형상의 판스프링으로 정의되는데, 제5도에 도시한 바와 같이, 그 형상은 내측에서 외측으로 갈수록 외경이 축소된 형상으로 마련된 두 개가 그 내측면이 밀착되게 설치되어 접촉부를 향하는 탄성력이 크도록 한다. 즉, 두 개의 마찰방지부재(70)는 그들의 접촉부측으로 탄성력을 발휘하게 되는 것이다.In addition, the bush 61 is integrally provided with the rotation shaft 40 on the inner rotation shaft 40 of the bearing 51 located on the inner side, and the oil seal 62 is provided between the bush 61 and the bearing 51 located on the inner side. ) Is installed to prevent water from penetrating. And between the oil seal 62 and the bearing 51 located inside the friction preventing member 70 having an elastic force is installed to prevent the friction noise generated when the rotating shaft 40 rotates. Friction preventing member 70 is defined as a washer-shaped plate spring, as shown in Figure 5, the shape is provided with two inner surfaces are in close contact with the outer diameter is reduced in shape from the inner side to the outer side Make sure the elastic force towards the contact is large. That is, the two friction preventing members 70 exert an elastic force on their contact side.

이와 같이 구성된 본 고안에 따른 세탁기의 회전축 지지구조의 작용효과를 설명하면 다음과 같다.Referring to the effect of the rotating shaft support structure of the washing machine according to the present invention configured as described above are as follows.

세탁물과 세탁수를 투입한후 세탁을 명령하면, 모터(14)가 동작하게 되는데, 모터(14)의 회전력은 벨트(16)와 풀리(15)를 통하여 회전축(40)으로 전달되어 회전축(40)과 일체로 회전하는 회전조(30)로 회전시킨다. 회전조(30)가 정역 회전하면 세탁물과 세탁수는 수류조절부재(35)에 의하여 일정높이 상측으로 올려졌다가 낙하되면서 세탁된다.After the laundry and the washing water are put into the washing instruction, the motor 14 is operated. The rotational force of the motor 14 is transmitted to the rotating shaft 40 through the belt 16 and the pulley 15 to rotate the rotating shaft 40. ) Rotates with a rotating tub (30) integrally rotating. When the rotating tub 30 rotates forward and backward, the laundry and the washing water are lifted upward by a predetermined height by the water flow control member 35 and are washed while falling.

탈수시에는 모터(14)가 회전조(30)를 고속회전시켜 세탁물에 있던 물기가 원심력에 의하여 분리되어 탈수되도록 한다.At the time of dehydration, the motor 14 rotates the rotating tub 30 at a high speed so that the water in the laundry is separated by centrifugal force and dehydrated.

그리고 본 고안에 따른 회전축 지지구조는, 세탁물이 편심된 상태에서 탈수하기 위하여 회전조가 고속회전하면 회전축에 편심 하중이 가해지면 이를 탄성력을 지닌 마찰방지부재가 탄성력을 발휘하여 회전축이 변형되는 것을 방지하여 부시와 베어링이 직접 마찰하는 것을 방지함으로써 베어링의 비회전 부위와 부시가 마찰하여 발생시키는 소음을 방지하는 효과가 있다. 또한 마찰방지부재가 하중에 탄성적으로 반응하여 이를 감쇄시켜 회전조의 불균형 회전을 빠른 시간내에 해소시키는 효과가 있다.And the rotating shaft support structure according to the present invention, when the rotating tub is rotated at high speed in order to dehydrate the laundry in the eccentric state, when the eccentric load is applied to the rotating shaft to prevent the deformation of the rotating shaft to exert the elastic force by the friction preventing member By preventing the friction between the bush and the bearing directly, there is an effect of preventing the noise generated by friction between the non-rotating portion of the bearing and the bush. In addition, the anti-friction member elastically reacts to the load and attenuates it, thereby eliminating the imbalanced rotation of the rotating tub within a short time.

Claims (2)

회전하여 세탁이나 탈수를 행하는 회전조, 상기 회전조를 구동하기 위한 모터, 상기 모터의 회전력을 상기 회전조 전달하는 회전축, 상기 회전축을 회전가능하게 지지하는 베어링을 포함하는 세탁기에 있어서, 상기 회전조(30)와 상기 베어링(51)사이의 상기 회전축(40)에는 탄성력을 갖는 마찰방지부재(70)가 설치된 것을 특징으로 하는 세탁기의 회전축 지지구조.A rotating tub for rotating and washing or dehydrating, a motor for driving the rotating tub, a rotating shaft for transmitting the rotating force of the motor, and a bearing for rotatably supporting the rotating shaft, wherein the rotating tub Rotating shaft support structure of the washing machine, characterized in that the anti-friction member 70 having an elastic force is installed in the rotary shaft 40 between the 30 and the bearing 51. 제1항에 있어서, 상기 마찰방지부재(70)는 두 개가 서로 대칭되게 마련되어 그 외측으로 갈수록 외경이 축소되는 형태로 마련된 것을 특징으로 하는 세탁기의 회전축 지지구조.The rotating shaft support structure of a washing machine according to claim 1, wherein the friction preventing member (70) is provided in a form in which two pieces thereof are symmetrically disposed and the outer diameter thereof is reduced toward the outside thereof.
KR2019960013841U 1996-05-30 1996-05-30 A supporting structure of a shaft in a washing machine KR0136038Y1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100903147B1 (en) * 2003-04-30 2009-06-16 삼성전자주식회사 Drum type washing machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100903147B1 (en) * 2003-04-30 2009-06-16 삼성전자주식회사 Drum type washing machine

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