KR100359329B1 - Track roller bearing - Google Patents
Track roller bearing Download PDFInfo
- Publication number
- KR100359329B1 KR100359329B1 KR1020000059467A KR20000059467A KR100359329B1 KR 100359329 B1 KR100359329 B1 KR 100359329B1 KR 1020000059467 A KR1020000059467 A KR 1020000059467A KR 20000059467 A KR20000059467 A KR 20000059467A KR 100359329 B1 KR100359329 B1 KR 100359329B1
- Authority
- KR
- South Korea
- Prior art keywords
- ring
- inner ring
- fixing
- roller bearing
- track roller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004080 punching Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 230000001050 lubricating effect Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
Classifications
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- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/44—Needle bearings
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- 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
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/07—Fixing them on the shaft or housing with interposition of an element
- F16C35/073—Fixing them on the shaft or housing with interposition of an element between shaft and inner race ring
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
본 발명은 외륜과 니들롤러, 내륜과 고정링으로 구성되는 트랙롤러 베어링에 관한 것으로서, 종래에는 내륜의 양단부에 양쪽 고정링을 강제로 끼워 조립하는 방식이기 때문에 내륜에 끼어지는 고정링이 너무 깊게 끼워지면 니들롤러와 간섭을 일으키거나 내륜에 끼워진 고정링이 쉽게 이탈되는 문제점이 있었다.The present invention relates to a track roller bearing consisting of an outer ring and a needle roller, an inner ring and a fixing ring, and the fixing ring fitted to the inner ring is too deeply inserted because both fixing rings are forcibly assembled at both ends of the inner ring. There was a problem that the interference with the ground needle roller or the fixing ring fitted to the inner ring is easily separated.
따라서 본 발명은 양단부(130)를 제외한 나머지 부분만이 열처리 된 트랙롤러 베어링의 내륜(100) 양측 소정부위에 단턱부(120)를 형성하여 고정링(300)이 내륜(100)의 외측둘레에 끼워질 때 고정링(300)의 저면이 단턱부(120)에 걸리면서 고정링(300)이 필요 이상으로 내륜(100)에 깊게 끼워지는 것을 방지할 수 있는 것이며, 또한 열처리가 되어 있지 않은 내륜(100)의 양단부(130)는 펀칭을 하여 코킹부 (111)를 형성함에 따라 상기 코킹부(111)가 고정링(300)의 상면에 위치되면서 고정링(300)이 내륜(100)으로부터 쉽게 이탈되는 것을 방지할 수 있으므로 트랙롤러 베어링의 내구성을 향상시켜 제품의 대한 신뢰성을 더욱 높일 수 있는 것이다.Therefore, in the present invention, the step ring 120 is formed on both sides of the inner ring 100 of the track roller bearing in which only the remaining portions except for the both ends 130 are heat-treated so that the fixing ring 300 is formed on the outer circumference of the inner ring 100. When the bottom surface of the fixing ring 300 is fitted to the stepped portion 120, the fixing ring 300 can be prevented from being deeply inserted into the inner ring 100 more than necessary, and the inner ring that is not heat treated ( Both ends 130 of the 100 is punched to form the caulking portion 111, so that the caulking portion 111 is located on the upper surface of the fixing ring 300, the fixing ring 300 is easily separated from the inner ring 100 It can be prevented to improve the durability of the track roller bearing to further increase the reliability of the product.
Description
본 발명은 축에 작용하는 하중을 받아서 축을 매끄럽게 회전시키는 기계요소인 트랙롤러 베어링에 관한 것으로서, 더욱 상세히는 트랙롤러 베어링의 내륜과 외륜 사이에 설치되어 니들롤러의 이탈을 방지해주는 고정링이 내륜의 외측둘레에 적절한 깊이로 설치되고 아울러 설치된 후에는 내륜으로부터 이탈되지 않도록 하므로서 트랙롤러 베어링의 내구성을 향상시켜 제품에 대한 소비자의 신뢰성을 더욱 높힐 수 있도록 한 트랙롤러 베어링에 관한 것이다.The present invention relates to a track roller bearing which is a mechanical element that rotates a shaft smoothly by receiving a load acting on the shaft. More specifically, the fixing ring is installed between the inner and outer rings of the track roller bearing to prevent the needle roller from being separated. The present invention relates to a track roller bearing which is installed at an appropriate depth on the outer circumference and prevents it from being separated from the inner ring, thereby improving the durability of the track roller bearing so as to increase consumer reliability of the product.
일반적으로 베어링은 힘과 무게 그리고 하중을 지지하면서 물체를 작은 마찰력으로 회전운동과 직선운동 시켜 동력과 변위를 전달하기 위한 안내에 사용되는 것으로서, 즉 회전하는 축의 저어널 및 왕복하는 축들을 지지하여 그 운동을 원할하게 유지하며 축에 작용하는 하중을 받아주는 역할을 한다.In general, bearings are used for guiding the transmission of power and displacement by rotating and linearly moving an object with small friction while supporting force, weight and load. It keeps the movement smooth and plays a role in receiving the load on the shaft.
이러한 베어링은 축과 베어링의 접촉종류에 따라 미끄럼 베어링(Sliding Bearing)과 구름 베어링(Roling Bearing)으로 나뉘며, 미끄럼 베어링은 윤활성 재료를 사용한 자기윤활 베어링과 다공질 재료에 기름을 침투시킨 베어링이 있고, 축과 베어링 사이의 공간에 축의 회전으로 유막을 자동으로 형성하는 동력학적 유체 윤활 베어링과 외부에서 압력유를 공급하여 회전축을 부상시키는 정력학적 유체 윤활 베어링이 있고 최근에는 자기 베어링과 기체 베어링도 나와있다.These bearings are divided into sliding bearing and rolling bearing according to the contact type between the shaft and the bearing. The sliding bearing includes a self-lubricating bearing using a lubricating material and a bearing in which oil penetrates into the porous material. There are dynamic fluid lubricating bearings that automatically form an oil film by rotating the shaft in the space between the bearing and the bearing, and static fluid lubricating bearings which float the rotating shaft by supplying pressure oil from the outside.
그리고 구름 베어링은 볼을 넣은 볼 베어링과 롤러를 넣은 롤러 베어링이 있으며, 구름 베어링은 원형의 궤도를 갖고 그 사이를 구르는 볼 또는 롤러의 구름마찰에 의해서 작용하는 베어링으로 미끄럼 베어링에 비해 정지마찰이 적다. 그리고, 하나의 베어링에 레이디얼과 스러스트의 양쪽 하중을 받을 수 있으며 사용방법이 쉽고 경제성이 양호하며 윤활의 편리성과 교환의 용이하다는 장점이 있다.Rolling bearings include ball bearings with rollers and roller bearings with rollers, and rolling bearings have a circular orbit and are acted by rolling friction of balls or rollers rolling between them, and have less static friction than sliding bearings. . In addition, one bearing can be subjected to both radial and thrust loads, has an advantage of easy use, good economical efficiency, ease of lubrication, and easy exchange.
한편, 도 1 은 니들롤러를 사용한 일반적인 트랙롤러 베어링을 예시한 것으로서, 링 형상으로 구성된 외륜(20)과 내륜(10) 그리고 니들롤러(40)와 고정링(30)으로서 트랙롤러 베어링이 구성되며 상기 각각의 구성부품은 마찰에 따른 마모를감안하여 열처리가 되어 있다.On the other hand, Figure 1 illustrates a general track roller bearing using a needle roller, the outer ring 20 and inner ring 10 and the needle roller 40 and the fixed ring 30, the track roller bearing is configured as a ring shape Each of the components is heat-treated in consideration of abrasion due to friction.
이러한 트랙롤러 베어링의 구성을 살펴보면 외륜(20)의 내측으로 내륜(10)이 끼워지며 상기 외륜(20)과 내륜(10)의 사이에는 니들롤러(40)가 끼워져 설치되고 고정링(30)은 내륜(10)의 외측 둘레에 강제끼움 방식으로 설치되면서 외륜(20)과 내륜(10)의 사이에 위치하여 상기 니들롤러(40)가 외륜(20)와 내륜(10)의 사이에서 이탈되는 것을 방지해 주는 것이다.Looking at the configuration of the track roller bearing such that the inner ring 10 is inserted into the inner ring 20, the needle roller 40 is fitted between the outer ring 20 and the inner ring 10 is installed and the fixed ring 30 is The needle roller 40 is located between the outer ring 20 and the inner ring 10 while being installed in a forced fit around the outer ring 10 of the inner ring 10 so that the needle roller 40 is separated between the outer ring 20 and the inner ring 10. It is to prevent.
그런데 종래에는 고정링(30)이 내륜(10)에 강제끼움 방식으로 설치되는 과정에서 외륜(20)과 내륜(10) 사이로 너무 깊이 설치될 경우 고정링(30)이 외륜(20) 또는 니들롤러(40)와 간섭을 일으키면서 내륜(10)과 고정링(30)이 함께 회전될 때 불필요한 마찰저항이 발생하게 되고 이에 따라 트랙롤러 베어링의 작동이 원할하지 못하게 되는 경우가 있었다.By the way, in the prior art when the fixing ring 30 is installed too deep between the outer ring 20 and the inner ring 10 in the process of being forced to the inner ring 10, the fixing ring 30 is the outer ring 20 or needle roller Unnecessary frictional resistance occurs when the inner ring 10 and the fixing ring 30 rotate together while interfering with the 40, and thus the operation of the track roller bearing may be undesired.
또한 내륜(10)의 외측둘레에 고정링(30)이 끼워져 고정된 후 트랙롤러 베어링의 작동에 따른 진동이나 충격등에 의해 내륜(10)로부터 고정링(30)이 쉽게 이탈되면서 니들롤러(40)가 내/외륜(10)(20) 사이에서 빠져나가는 문제점이 있었다.In addition, after the fixing ring 30 is inserted and fixed to the outer circumference of the inner ring 10, the needle ring 40 is easily detached from the inner ring 10 by vibration or shock caused by the operation of the track roller bearing. There was a problem to escape between the inner / outer ring (10, 20).
따라서 본 발명은 상기와 같은 종래의 문제점을 해결하기 위해 발명된 것으로서, 본 발명의 목적은 트랙롤러 베어링의 내륜과 외륜의 사이에 끼워져 니들롤러의 이탈을 방지해주는 고정링이 적절한 깊이로 설치된 후 내륜으로부터 쉽게 이탈되는 것을 방지하므로서 내구성을 향상시키고 제품에 대한 신뢰성을 높일 수 있도록 한 트랙롤러 베어링을 제공하는데 있다.Therefore, the present invention has been invented to solve the conventional problems as described above, the object of the present invention is inserted between the inner ring and the outer ring of the track roller bearing is installed in the inner ring after the fixed ring is installed to an appropriate depth to prevent the needle roller It is to provide a track roller bearing which can improve the durability and increase the reliability of the product by preventing it from being easily detached from it.
이와 같은 본 발명의 목적은 양단부를 제외한 나머지 부분이 열 처리된 내륜의 양측 소정부위에 단턱부를 형성하여 내륜의 외측둘레에 고정링이 끼워질 때 고정링의 저면이 상기 단턱부에 걸려 고정되도록 하고, 내륜의 끝단은 펀칭을 하여 코킹부를 구성하면 상기 코킹부가 고정링의 상면에 위치되면서 내륜에 끼워진 고정링이 이탈되는 것을 방지할 수 있으므로 효과적으로 달성되는 것이다.The object of the present invention is to form a stepped portion at both sides of the predetermined portion of the inner ring heat treatment other than the other end portion so that the bottom surface of the fixed ring is fixed to the stepped portion when the fixing ring is fitted to the outer circumference of the inner ring When the end of the inner ring is punched to constitute a caulking portion, the caulking portion may be located on the upper surface of the fixing ring, thereby preventing the fixing ring fitted to the inner ring from being separated.
도 1 은 종래의 구성에 따른 트랙롤러 베어링을 도시한 단면도.1 is a cross-sectional view showing a track roller bearing according to a conventional configuration.
도 2 는 본 발명에 따른 트랙롤러 베어링을 예시한 단면도.2 is a cross-sectional view illustrating a track roller bearing according to the present invention.
도 3 은 본 발명에 따른 트랙롤러 베어링의 측면도.Figure 3 is a side view of the track roller bearing according to the present invention.
도면의 주요 부분에 대한 부호의 설명Explanation of symbols for the main parts of the drawings
100 : 내륜 111 : 코킹부100: inner ring 111: caulking portion
120 : 단턱부 200 : 외륜120: step 200: outer ring
300 : 고정링 400 : 니들롤러300: retaining ring 400: needle roller
이하, 본 발명의 특징을 효과적으로 달성할 수 있는 바람직한 실시 예로서 그 기술구성 및 작용효과를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings, the technical configuration and operational effects as a preferred embodiment that can effectively achieve the features of the present invention will be described.
즉, 도 2 는 본 발명에 따른 트랙롤러 베어링을 예시한 단면도이며, 도 3 은 본 발명에 따른 트랙롤러 베어링의 측면도를 예시한 것으로서, 이에 예시한 바와 같이 본 발명은 외륜과 내륜 및 고정링과 니들롤러로 트랙롤러 베어링을 구성할 때 양단부(130)를 제외한 나머지 부분을 열처리한 내륜(100)의 양측 소정부위에 단턱부(120)를 형성하여 상기 단턱부(120)에 의해 내륜(100)의 외측둘레에 끼워지는 고정링(300)의 저면이 걸리도록 하고, 내륜(100)의 양 끝단에는 펀칭을 통한 코킹부 (111)를 형성하여 상기 코킹부(111)가 고정링(300)의 테두리 상면에 위치되면서 고정링(300)이 내륜(100)로부터 이탈되는 것을 방지할 수 있도록 한 것을 특징으로 하는 것이다.That is, Figure 2 is a cross-sectional view illustrating a track roller bearing according to the present invention, Figure 3 illustrates a side view of the track roller bearing according to the present invention, as exemplified in the present invention is the outer ring and the inner ring and the fixing ring and When the track roller bearing is formed of a needle roller, the inner ring 100 is formed by the stepped part 120 by forming the stepped parts 120 at both sides of the predetermined part of the inner ring 100 which heat-treated the remaining parts except for both ends 130. The bottom surface of the fixing ring 300 to be fitted to the outer circumference of the hook is formed, and both ends of the inner ring 100 to form a caulking portion 111 through the punching by the caulking portion 111 of the fixing ring 300 It is characterized in that the fixing ring 300 is to be prevented from being separated from the inner ring 100 while being positioned on the upper surface of the rim.
도면중 미설명 부호 (110)은 펀칭부이고, (200)은 외륜이며, (400)은 외륜(200)과 내륜(100)의 사이에 설치되는 니들롤러이다.In the drawing, reference numeral 110 is a punching part, 200 is an outer ring, and 400 is a needle roller installed between the outer ring 200 and the inner ring 100.
이러한 본 발명은 고정링(300)을 외륜(200)과 내륜(100)의 사이, 즉 내륜 (100)의 외측둘레에 끼워넣게 되면 고정링(300)이 소정 깊이로 끼워지다가 고정링 (300)의 저면이 내륜(100)의 단턱부(120)에 걸려 고정되면서 고정링(300)의 설치되는 깊이가 정해진다.In the present invention, when the fixing ring 300 is inserted between the outer ring 200 and the inner ring 100, that is, the outer circumference of the inner ring 100, the fixing ring 300 is fitted to a predetermined depth, and the fixing ring 300 is fixed. The bottom surface of the inner ring 100 is fixed to the stepped portion 120 is fixed while the depth of the fixed ring 300 is installed.
그리고 내륜(100)에 고정링(300)이 끼워져 고정된 후 내륜(100)의 양단부 (130)에 펀칭부(110)를 형성하게 되면 상기 펀칭부(110)에 의해 코킹부(111)가 형성되며 상기 코킹부(111)는 고정링의 테두리 상면에 위치되어 고정링의 유동을 방지하게 된다.When the fixing ring 300 is inserted into the inner ring 100 and fixed, the punching part 110 is formed at both ends 130 of the inner ring 100, and the caulking part 111 is formed by the punching part 110. And the caulking portion 111 is located on the upper surface of the edge of the fixing ring to prevent the flow of the fixing ring.
여기서 트랙롤러 베어링의 각 부품들은 회전에 따른 마찰 등을 고려 하여 열처리 과정을 거치게 되는데 내륜(100)의 양단부(130)는 펀칭부(110)를 형성하기 위해서 열처리 과정에서 제외하거나 또는 내륜(100) 전체를 열처리한 상태에서 양단부만을 열풀림 작업을 하여 비열처리가 되도록 한 것이다.Here, each part of the track roller bearing undergoes a heat treatment process in consideration of friction due to rotation, etc. Both ends 130 of the inner ring 100 are excluded from the heat treatment process to form the punching part 110 or the inner ring 100. In the state that the whole is heat-treated, only the both ends are thermally annealed so as to be non-thermally treated.
이러한 본 발명의 트랙롤러 베어링의 조립과정을 개략적으로 살펴보면 구성요소로는 외륜(200)과 상기 외륜(200)의 직경보다 작은 직경으로 구성된 내륜(100) 그리고 니들롤러(400)와 고정링(300)으로 이루어지며, 외륜(200)과 고정링(300)과 니들롤러(400)는 각각 열처리 과정을 거쳐 제작되고 내륜(100)은 앞에서도 언급한 바와 같이 양단부(130)을 제외하고 열처리 하거나 전체를 모두 열처리 한 다음 양단부(130)에 고주파 열풀림을 하여 비열처리가 되도록 한 것이다.Looking at the assembly process of the track roller bearing of the present invention as a component of the outer ring 200 and the inner ring 100 consisting of a smaller diameter than the diameter of the outer ring 200 and the needle roller 400 and the fixing ring 300 The outer ring 200, the fixing ring 300 and the needle roller 400 is made through a heat treatment process, and the inner ring 100 is heat treated except for both ends 130 as described above. After all of the heat treatment, both ends 130 are subjected to high-frequency heat loosening so that the non-thermal treatment.
따라서 외륜(200)의 내측에 내륜(100)를 끼워넣고 상기 외륜(200)과 내륜(100)의 사이에는 니들롤러(400)를 설치하며 상기 내륜(100)의 외측 둘레에 고정링 (300)이 끼워지는데, 이때 고정링(300)이 내륜(100)의 단턱부(120)에 걸리게 되면서 그 설치위치가 정해짐에 따라 고정링(300)이 외륜(200)과 내륜(100)의 사이에 너무 깊게 설치되면서 고정링(300)이 외륜(200) 또는 니들롤러(400)와 간섭을 일으켜 트랙롤러 베어링의 성능이 저하되는 것을 효과적으로 방지할 수 있는 것이다.Therefore, the inner ring 100 is inserted into the inner ring 200, and the needle roller 400 is installed between the outer ring 200 and the inner ring 100 and the fixing ring 300 is disposed around the outer ring of the inner ring 100. In this case, the fixing ring 300 is caught between the stepped portion 120 of the inner ring 100, and the fixing ring 300 is disposed between the outer ring 200 and the inner ring 100 as the installation position is determined. While being installed too deep, the fixing ring 300 interferes with the outer ring 200 or the needle roller 400 to effectively prevent the performance of the track roller bearing from deteriorating.
그리고 상기와 같이 내륜(100)의 외측둘레에 고정링(300)이 설치되면 내륜(100)의 양단부(130)의 상면과 고정링(300)의 상면이 동일면을 이루게 되며 상기 내륜(100)의 양단부(130)에 펀칭부(110)를 형성하게 되면 펀칭부(110)에 의해 코킹부(111)가 형성되면서 상기 코킹부(111)는 고정링(300)의 테두리 상면에 위치하게 되고 이에 따라 고정링(300)이 상기 코킹부(111)에 걸리게 되므로 트랙롤러 베어링이 작동되는 과정에서 발생하는 진동 또는 충격 등에 내륜(100)로부터 고정링(300)이 이탈되는 것을 방지할 수 있는 것이다.When the fixing ring 300 is installed on the outer circumference of the inner ring 100 as described above, the upper surface of both ends 130 of the inner ring 100 and the upper surface of the fixing ring 300 form the same plane, and the inner ring 100 of the inner ring 100 When the punching unit 110 is formed at both ends 130, the caulking unit 111 is formed by the punching unit 110, and the caulking unit 111 is positioned on the upper surface of the edge of the fixing ring 300. Since the fixing ring 300 is caught by the caulking unit 111, the fixing ring 300 may be prevented from being separated from the inner ring 100 due to vibration or shock generated during the operation of the track roller bearing.
이상에서 상술한 바와 같이 본 발명은 트랙롤러 베어링의 내륜과 외륜의 사이에 설치되어 니들롤러의 이탈을 방지해주는 고정링이 내륜의 외측둘레에 설치될 때, 필요 이상으로 내륜과 외륜의 사이로 깊게 설치되거나, 내륜의 외측둘레에 설치된 고정링이 트랙롤러 베어링의 작동에 따른 진동 또는 충격 등으로 내륜에서 쉽게 이탈되는 것을 방지할 수 있어 트랙롤러 베어링의 내구성을 향상시켜 소비자로 하여금 제품에 대한 신뢰성을 향상시킬 수 있도록 한 것이다.As described above, the present invention is installed between the inner ring and the outer ring of the track roller bearing is installed deeply between the inner ring and the outer ring more than necessary when the fixing ring is installed on the outer circumference of the inner ring to prevent the needle roller from being separated. Or the fixed ring installed at the outer circumference of the inner ring can be prevented from being easily detached from the inner ring due to the vibration or shock caused by the operation of the track roller bearing, thereby improving the durability of the track roller bearing and improving the reliability of the product. It was made to be possible.
Claims (3)
Priority Applications (1)
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KR1020000059467A KR100359329B1 (en) | 2000-10-10 | 2000-10-10 | Track roller bearing |
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KR1020000059467A KR100359329B1 (en) | 2000-10-10 | 2000-10-10 | Track roller bearing |
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KR2020000009010U Division KR200193696Y1 (en) | 2000-03-30 | 2000-03-30 | Track roller bearing |
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KR20010000629A KR20010000629A (en) | 2001-01-05 |
KR100359329B1 true KR100359329B1 (en) | 2002-10-31 |
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KR1020000059467A Expired - Lifetime KR100359329B1 (en) | 2000-10-10 | 2000-10-10 | Track roller bearing |
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KR100925770B1 (en) | 2008-01-23 | 2009-11-11 | 이태식 | Load-end bearings |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5798350U (en) * | 1980-12-08 | 1982-06-17 | ||
JPH0326830U (en) * | 1989-07-24 | 1991-03-19 |
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JPS5798350U (en) * | 1980-12-08 | 1982-06-17 | ||
JPH0326830U (en) * | 1989-07-24 | 1991-03-19 |
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Publication number | Priority date | Publication date | Assignee | Title |
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KR100925770B1 (en) | 2008-01-23 | 2009-11-11 | 이태식 | Load-end bearings |
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