KR20220034367A - Cross Roller Bearing Of Long Life Span - Google Patents

Cross Roller Bearing Of Long Life Span Download PDF

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Publication number
KR20220034367A
KR20220034367A KR1020200116649A KR20200116649A KR20220034367A KR 20220034367 A KR20220034367 A KR 20220034367A KR 1020200116649 A KR1020200116649 A KR 1020200116649A KR 20200116649 A KR20200116649 A KR 20200116649A KR 20220034367 A KR20220034367 A KR 20220034367A
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South Korea
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outer ring
inner ring
ring
accommodating
raceway groove
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KR1020200116649A
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Korean (ko)
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KR102474414B1 (en
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현준수
김세윤
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(주)원에스티
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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
    • F16C19/34—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 for both radial and axial load
    • F16C19/36—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 for both radial and axial load with a single row of rollers
    • F16C19/361—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 for both radial and axial load with a single row of rollers with cylindrical rollers
    • F16C19/362—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 for both radial and axial load with a single row of rollers with cylindrical rollers the rollers being crossed within the single row
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6607—Retaining the grease in or near the bearing

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

The present invention relates to a long-life crossed roller bearing. The long-life crossed roller bearing includes: an outer ring (110) having an outer ring raceway (111) formed on an inner diameter side; an inner ring (120) located on the inside of the outer ring (110) and having an inner ring raceway (121) on the outer diameter side forming a raceway part together with the outer ring raceway (111); and multiple rollers (150) arranged zigzag along the raceway part. In the outer ring raceway (111), an outer ring raceway groove (113) concavely formed in the center extends in a circumferential direction, and multiple outer ring receiving portions (115) spaced apart from each other in the circumferential direction are formed to receive grease. The outer ring receiving portion (115) has an inner end communicating with the outer ring raceway groove (113) and an outer side is opened to an outer diameter surface of the outer ring. The long-life crossed roller bearing further includes an outer ring cover (130) to cover an opening end portion opened to the outer diameter surface of the outer ring.

Description

장수명 크로스 롤러 베어링{Cross Roller Bearing Of Long Life Span}Long Life Cross Roller Bearing {Cross Roller Bearing Of Long Life Span}

본 발명은 크로스 롤러 베어링에 관한 것으로, 보다 상세하게는 베어링 내에 그리스 수용 공간이 형성되어 그리스 주입 주기를 늦출 수 있도록 한 장수명 크로스 롤러 베어링에 관한 것이다.The present invention relates to a crossed roller bearing, and more particularly, to a long-life crossed roller bearing in which a grease accommodating space is formed in the bearing to delay the grease injection cycle.

도 1 및 도 2에 나타낸 바와 같이, 크로스 롤러 베어링(1)은 외륜(2)과, 내륜(3)과, 외륜(2)과 내륜(3) 사이에 형성된 사각형 단면의 링 형상의 궤도부(4)를 따라 정렬된 복수의 원통형의 롤러(5)와, 인접하는 롤러(5) 사이의 원주 방향 거리를 일정한 간격으로 유지하는 리테이너(6)로 이루어진다.1 and 2, the crossed roller bearing 1 has an outer ring 2, an inner ring 3, and a ring-shaped raceway portion ( It consists of a plurality of cylindrical rollers 5 aligned along 4), and a retainer 6 that maintains a circumferential distance between adjacent rollers 5 at regular intervals.

상기 외륜(2)은 일체형으로 제조될 수 있다. 상기 내륜(3)에는 내륜(3)의 하나의 링 형상 측면으로부터 궤도부(4)로 연장되는 롤러삽입홈(3a)이 형성되어 있으며, 롤러(5)가 롤러삽입홈(3a)으로부터 궤도부(4)로 삽입된다. 이 롤러삽입홈(3a)에는 볼트(7)에 의해 내륜(3)에 플러그(8)가 체결 고정 삽입되어 롤러삽입홈(3a)이 밀봉된다. 이 대신에, 외륜(2) 혹은 내륜(3)을 좌우로 분할 가능한 한 쌍의 분할륜으로 형성하여, 롤러(5) 및 리테이너(6)를 분할륜 사이에 형성된 궤도부(4)에 삽입하는 구조도 있다.The outer ring 2 may be manufactured integrally. A roller insertion groove 3a extending from one ring-shaped side surface of the inner ring 3 to the raceway 4 is formed in the inner ring 3, and the roller 5 moves from the roller insertion groove 3a to the raceway portion. (4) is inserted. A plug 8 is fastened and fixed to the inner ring 3 by a bolt 7 into the roller insertion groove 3a, and the roller insertion groove 3a is sealed. Instead of this, the outer ring 2 or the inner ring 3 is formed into a pair of split rings that can be split left and right, and the roller 5 and the retainer 6 are inserted into the raceway 4 formed between the split wheels. There is also a structure.

종래의 크로스 롤러 베어링은 그리스를 궤도부(4)와 그 주위의 공간에 채워 넣고 축 방향 양측의 외륜(2)과 내륜(3) 사이의 개구부에 씰(Seal)을 설치하는 구조로 되어 있다. 그리고 주기적으로 그리스를 채울 수 있도록 그리스 주입구를 설계하고 있다. 이와 같은 베어링은 장기간(1년 이상) 그리스 주입없이 사용하는 데에서는 많은 파손 사고가 일어나는 문제점이 있었다.The conventional crossed roller bearing has a structure in which grease is filled in the raceway 4 and the space around it, and a seal is installed in the opening between the outer ring 2 and the inner ring 3 on both sides in the axial direction. And the grease inlet is designed so that it can be filled with grease periodically. Such bearings have a problem in that many breakage accidents occur when used without grease for a long period of time (more than one year).

대한민국 공개번호 제10-2011-0093644호 공개특허공보Korean Patent Laid-Open No. 10-2011-0093644

본 발명은 상기와 같은 종래 기술이 가지는 문제점을 해결하기 위하여 제안된 것으로, 장기간 그리스 주입없이 윤활되는 장수명 크로스 롤러 베어링에 관한 것이다.The present invention has been proposed to solve the problems of the prior art, and relates to a long-life crossed roller bearing lubricated without grease injection for a long period of time.

상기와 같은 목적을 위하여, 본 발명은 내경측에 외륜궤도가 형성된 외륜과, 상기 외륜의 내측에 위치하며 외경측에 상기 외륜궤도와 함께 궤도부를 형성하는 내륜궤도가 형성된 내륜과, 상기 궤도부를 따라 지그재그로 정렬된 복수의 전동체를 포함하며; 상기 외륜궤도에는 그 중심부에 오목하게 형성된 외륜궤도홈이 원주 방향을 따라 연장되어 형성되고, 원주 방향을 따라 이격되어 그리스가 수용된 복수의 외륜수용부가 형성되며; 상기 외륜수용부는 내측 단부가 외륜궤도홈으로 연통되고 외측은 외륜외경면으로 개구되며, 외륜외경면으로 개구된 개구단부를 막는 외륜커버가 더 포함된 장수명 크로스 롤러 베어링을 제공한다.For the above purpose, the present invention provides an outer ring having an outer ring track formed on the inner diameter side, an inner ring positioned inside the outer ring and having an inner ring track forming a track portion together with the outer ring track on the outer diameter side, and along the track portion a plurality of rolling elements arranged in a zigzag; In the outer ring raceway, an outer ring raceway groove formed concavely in the center thereof is formed to extend along the circumferential direction, and a plurality of outer ring accommodating parts in which the grease is accommodated are formed while being spaced apart along the circumferential direction; The outer ring accommodating part provides a long-life cross roller bearing further comprising an outer ring cover having an inner end communicating with the outer ring raceway groove, an outer ring opening to the outer ring outer diameter surface, and blocking the open end opening to the outer ring outer ring surface.

상기에서, 내륜궤도에는 그 중심부에 오목하게 형성된 내륜궤도홈이 원주 방향을 따라 연장되어 형성되고, 원주 방향을 따라 이격되어 그리스가 수용된 복수의 내륜수용부가 형성되며; 상기 내륜수용부는 외측 단부가 내륜궤도홈으로 연통되고 내측은 내륜내경면으로 개구되며, 내륜내경면으로 개구된 개구단부를 막는 내륜커버가 더 포함된 것을 특징으로 한다.In the above, the inner ring raceway has an inner ring raceway groove concavely formed in the center thereof extending along the circumferential direction, and spaced apart along the circumferential direction to form a plurality of inner ring receiving portions accommodating grease; The inner ring receiving portion is characterized in that the outer end communicates with the inner ring raceway groove, the inner side is opened to the inner ring inner diameter surface, characterized in that it further includes an inner ring cover for blocking the open end opened to the inner ring inner diameter surface.

상기에서, 외륜수용부는 반경 방향으로 연장된 형태로 형성되고, 반경 방향 내측에 내경 쪽으로 가까워질수록 반지름이 감소하는 외륜수용테이퍼부가 형성되고, 상기 외륜수용테이퍼부의 내측 단부로부터 외륜궤도홈까지 내향 연장되며 외륜궤도홈의 폭과 같거나 외륜궤도홈의 폭보다 작은 지름을 가지는 외륜수용연장부가 형성된 것을 특징으로 한다.In the above, the outer ring accommodating part is formed in a radially extending form, and an outer ring accommodating taper part whose radius decreases as it approaches the inner diameter is formed inside the radial direction, and extends inwardly from the inner end of the outer ring accommodating taper part to the outer ring raceway groove And it is characterized in that the outer ring receiving extension having a diameter equal to the width of the outer ring raceway groove or smaller than the width of the outer ring raceway groove is formed.

상기에서, 외륜수용부는 반경 방향으로 연장된 형태로 형성되고, 반경 방향 내측에 내경 쪽으로 가까워질수록 반지름이 감소하는 외륜수용테이퍼부가 형성되고, 상기 외륜수용테이퍼부의 내측 단부로부터 외륜궤도홈까지 내향 연장되며 외륜궤도홈의 폭과 같거나 외륜궤도홈의 폭보다 작은 지름을 가지는 외륜수용연장부가 형성되며; 상기 내륜수용부는 반경 방향으로 연장된 형태로 형성되고, 반경 방향 외측에 외경 쪽으로 가까워질수록 반지름이 감소하는 내륜수용테이퍼부가 형성되고, 상기 내륜수용테이퍼부의 외측 단부로부터 내륜궤도홈까지 외향 연장되며 내륜궤도홈의 폭과 같거나 내륜궤도홈의 폭보다 작은 지름을 가지는 내륜수용연장부가 형성되며; 상기 내륜수용연장부의 외측 단부와 외륜수용연장부의 내측 단부는 서로 마주하여, 반경 방향 내외측에서 마주하여 궤도부로 그리스가 공급되는 것을 특징으로 한다.In the above, the outer ring accommodating part is formed in a radially extending form, and an outer ring accommodating taper part whose radius decreases as it approaches the inner diameter is formed inside the radial direction, and extends inwardly from the inner end of the outer ring accommodating taper part to the outer ring raceway groove and an outer ring receiving extension having a diameter equal to the width of the outer ring raceway groove or smaller than the width of the outer ring raceway groove is formed; The inner ring accommodating portion is formed to extend in a radial direction, and an inner ring accommodating taper portion whose radius decreases as it approaches the outer diameter is formed on the outside in the radial direction, and extends outwardly from the outer end of the inner ring receiving tapered portion to the inner ring raceway groove, and the inner ring an inner ring receiving extension having a diameter equal to the width of the raceway groove or smaller than the width of the inner ring raceway groove is formed; The outer end of the inner ring accommodating extension and the inner end of the outer ring accommodating extension face each other, and the grease is supplied to the raceway while facing each other from the inner and outer sides in the radial direction.

상기에서, 외륜수용부에는 외륜커버의 내측으로 중공체인 외륜수용팽창부재가 더 구비되고, 상기 내륜수용부에는 내륜커버의 외측으로 중공체인 내륜수용팽창부재가 더 구비된 것을 특징으로 한다.In the above, the outer ring accommodating part is further provided with a hollow outer ring accommodating expandable member inside the outer ring cover, and the inner ring accommodating part is characterized in that it is further provided with a hollow inner ring accommodating expandable member on the outside of the inner ring cover.

본 발명에 따르는 장수명 크로스 롤러 베어링(100)에 의하면, 외륜(110) 및/또는 내륜(120)에 그리스가 수용되는 수용공간이 형성되어 궤도로 연통된 그리스가 수용됨으로써 외부로부터의 그리스 공급이 없어도 전동체(150) 주변으로 그리스 공급이 이루어질 수 있고, 베어링 작동에 따른 온도 증가에 따라 더 많은 양의 그리스가 공급되어 장수명이 달성될 수 있다.According to the long-life crossed roller bearing 100 according to the present invention, an accommodating space for accommodating the grease is formed in the outer ring 110 and/or the inner ring 120 to accommodate the grease communicating with the track, so that even without a grease supply from the outside Grease may be supplied around the rolling element 150 , and a larger amount of grease may be supplied according to an increase in temperature according to the bearing operation to achieve a long life.

도 1은 종래 기술에 의한 크로스 롤러 베어링을 도시한 일부 절개 측면도이며,
도 2는 도 1의 일점 쇄선에 따른 단면도이며,
도 3은 본 발명에 따르는 장수명 크로스 롤러 베어링을 도시한 측면도이며,
도 4는 도 3의 "A"-"A"선에 따른 단면도이며,
도 5는 도 4의 수용공간을 설명하기 위하여 확대 도시한 것이다.1 is a partially cutaway side view showing a cross roller bearing according to the prior art;
Figure 2 is a cross-sectional view taken along the dash-dotted line in Figure 1,
3 is a side view showing a long-life crossed roller bearing according to the present invention;
Figure 4 is a cross-sectional view taken along the line "A" - "A" of Figure 3,
5 is an enlarged view to explain the accommodation space of FIG. 4 .

이하에서 첨부된 도면을 참조하여, 본 발명의 장수명 크로스 롤러 베어링에 대하여 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings, a long-life crossed roller bearing of the present invention will be described in detail.

도 3은 본 발명에 따르는 장수명 크로스 롤러 베어링을 도시한 측면도이며, 도 4는 도 3의 "A"-"A"선에 따른 단면도이며, 도 5는 도 4의 수용공간을 설명하기 위하여 확대 도시한 것이다.3 is a side view showing a long-life crossed roller bearing according to the present invention, FIG. 4 is a cross-sectional view taken along the line "A" - "A" of FIG. 3, and FIG. 5 is an enlarged view to explain the accommodation space of FIG. did it

본 발명의 장수명 크로스 롤러 베어링(100)은 내경측에 외륜궤도(111)가 형성된 외륜(110)과, 상기 외륜(110)의 내측에 위치하며 외경측에 상기 외륜궤도(111)와 함께 궤도부를 형성하는 내륜궤도(121)가 형성된 내륜(120)과, 상기 궤도부를 따라 지그재그로 정렬된 복수의 전동체(150)를 포함한다. 상기 궤도부에는 전동체(150)의 원주 방향 간격을 일정하게 유지시키는 케이지(도시하지 않음)가 구비된다. 도 2에서 도면부호 105는 외륜(110)과 내륜(120) 사이에 양측으로 개구된 개구부에 설치된 씰(Seal)을 도시한 것이다. The long-life crossed roller bearing 100 of the present invention includes an outer ring 110 having an outer ring raceway 111 formed on the inner diameter side, and a raceway located inside the outer ring 110 and with the outer ring raceway 111 on the outer diameter side. It includes an inner ring 120 on which the inner ring track 121 is formed, and a plurality of rolling elements 150 arranged in a zigzag along the track portion. A cage (not shown) for maintaining a constant circumferential distance of the rolling elements 150 is provided on the track portion. In FIG. 2 , reference numeral 105 denotes a seal installed in an opening opened at both sides between the outer ring 110 and the inner ring 120 .

도 1에서 도면부호 101은 플러그를, 103은 플러그를 체결 고정하는 볼트를 도시한 것이다. 본 발명은 볼트(103)로 체결 고정되는 플러그(101)를 구비하는 형태에 한정되지 않고, 내륜(120)이나 외륜(110)이 분할된 형태로 구비될 수도 있다. In FIG. 1, reference numeral 101 denotes a plug, and 103 denotes a bolt for fastening and fixing the plug. The present invention is not limited to the form provided with the plug 101 fastened with bolts 103 , and the inner ring 120 or the outer ring 110 may be provided in a divided form.

상기 외륜(110)에는 외륜궤도(111)의 축 방향 중심을 지나 원주 방향으로 연장되며 오목한 외륜궤도홈(113)이 형성된다. 상기 내륜(120)에는 내륜궤도(121)의 축 방향 중심을 지나 원주 방향으로 연장되며 오목한 내륜궤도홈(123)이 형성된다.The outer ring 110 has a concave outer ring track groove 113 extending in the circumferential direction through the axial center of the outer ring track 111 . The inner ring 120 has a concave inner ring track groove 123 extending in the circumferential direction through the axial center of the inner ring track 121 .

상기 외륜(110)에는 원주 방향을 따라 이격되며, 그리스가 수용된 복수의 외륜수용부(115)가 형성된다. 상기 외륜수용부(115)는 내측 단부가 외륜궤도홈(113)으로 연통되고 외측은 외륜외경면으로 개구된다. 상기 외륜(110)에는 외륜외경면으로 개구된 외륜수용부(115)의 개구단부를 막는 외륜커버(130)가 더 포함된다. 상기 외륜수용부(115)의 외경측에 암나사(115b)가 형성되고, 외륜커버(130)는 외륜수용부(115)에 나사 체결되어 결합될 수 있다.A plurality of outer ring accommodating parts 115 spaced apart along the circumferential direction and accommodating grease are formed in the outer ring 110 . The outer ring accommodating part 115 has an inner end communicating with the outer ring raceway groove 113, and the outer ring is opened to the outer ring outer diameter surface. The outer ring 110 further includes an outer ring cover 130 for blocking the open end of the outer ring receiving portion 115 opened to the outer ring outer diameter surface. A female screw 115b is formed on the outer diameter side of the outer ring receiving portion 115 , and the outer ring cover 130 may be screwed to and coupled to the outer ring receiving portion 115 .

상기 외륜수용부(115)의 내측 단부가 외륜궤도홈(113)으로 연통되므로, 외륜수용부(115)에 수용된 그리스는 외륜궤도홈(113)을 통하여 궤도부로 공급될 수 있다. 따라서 그리스의 추가 공급없이 궤도부로 그리스가 공급될 수 있다.Since the inner end of the outer ring receiving part 115 communicates with the outer ring raceway groove 113 , the grease accommodated in the outer ring receiving part 115 may be supplied to the track part through the outer ring raceway groove 113 . Therefore, grease can be supplied to the raceway without additional supply of grease.

상기 내륜(120)에는 원주 방향을 따라 이격되며, 그리스가 수용된 복수의 내륜수용부(125)가 형성된다. 상기 내륜수용부(125)는 외측 단부가 내륜궤도홈(123)으로 연통되고 내측은 내륜내경면으로 개구된다. 상기 내륜(120)에는 내륜내경면으로 개구된 내륜수용부(125)의 개구단부를 막는 내륜커버(140)가 구비된다. 상기 내륜수용부(125)의 내경측에 암나사(125b)가 형성되고, 내륜커버(140)는 내륜수용부(125)에 나사 체결되어 결합된다. A plurality of inner ring accommodating portions 125 spaced apart from each other in the circumferential direction and containing grease are formed in the inner ring 120 . The inner ring receiving portion 125 has an outer end that communicates with the inner ring raceway groove 123, and the inner side is opened to the inner ring inner diameter surface. The inner ring 120 is provided with an inner ring cover 140 that blocks the open end of the inner ring receiving portion 125 opened to the inner ring inner diameter surface. A female screw 125b is formed on the inner diameter side of the inner ring receiving portion 125 , and the inner ring cover 140 is screwed to the inner ring receiving portion 125 and coupled thereto.

상기 내륜수용부(125)의 외측 단부가 내륜궤도홈(123)으로 연통되므로, 내륜수용부(125)에 수용된 그리스는 내륜궤도홈(123)을 통하여 궤도부로 공급될 수 있다. 따라서 그리스의 추가 공급없이 내외측에서 궤도부로 그리스가 공급될 수 있다.Since the outer end of the inner ring receiving part 125 communicates with the inner ring raceway groove 123 , the grease accommodated in the inner ring receiving part 125 may be supplied to the raceway through the inner ring raceway groove 123 . Therefore, grease can be supplied to the raceway from the inside and outside without additional supply of grease.

상기 외륜수용부(115)는 반경 방향으로 연장된 형태로 형성되고, 반경 방향 내측에 내경 쪽으로 가까워질수록 반지름이 감소하는 외륜수용테이퍼부(115c)가 형성된다. 상기 외륜수용테이퍼부(115c)의 내측 단부로부터 외륜궤도홈(113)까지 내향 연장되며 외륜궤도홈(113)의 폭과 같거나 외륜궤도홈(113)의 폭보다 작은 지름을 가지는 외륜수용연장부(115a)가 형성된다. 외륜수용테이퍼부(115c)의 외측의 외륜수용부(115) 부분은 외륜수용테이퍼부(115c)의 최대 지름이 내경이 된다. 외륜수용테이퍼부(115c)를 지나 지름이 작은 외륜수용연장부(115a)를 통하여 배출되므로 장기간 비교적 균일하게 그리스가 배출되어 지속적인 그리스 공급이 가능하다.The outer ring accommodating part 115 is formed to extend in a radial direction, and an outer ring accommodating taper part 115c whose radius decreases as it approaches the inner diameter is formed inside the radial direction. The outer ring accommodating extension portion extending inwardly from the inner end of the outer ring accommodating taper part 115c to the outer ring raceway groove 113 and having a diameter equal to the width of the outer ring raceway groove 113 or smaller than the width of the outer ring raceway groove 113 (115a) is formed. In the outer ring accommodating portion 115 portion of the outer ring accommodating tapered portion 115c, the maximum diameter of the outer ring accommodating tapered portion 115c becomes the inner diameter. Since it is discharged through the outer ring accommodating taper part 115c and the outer ring accommodating extension part 115a having a small diameter, the grease is discharged relatively uniformly for a long period of time, so that continuous grease supply is possible.

상기 내륜수용부(125)는 반경 방향으로 연장된 형태로 형성되고, 반경 방향 외측에 외경 쪽으로 가까워질수록 반지름이 감소하는 내륜수용테이퍼부(125c)가 형성되고, 상기 내륜수용테이퍼부(125c)의 외측 단부로부터 내륜궤도홈(123)까지 외향 연장되며 내륜궤도홈(123)의 폭과 같거나 내륜궤도홈(123)의 폭보다 작은 지름을 가지는 내륜수용연장부(125a)가 형성된다. 내륜수용테이퍼부(125c)의 내측의 내륜수용부(125) 부분은 외륜수용테이퍼부(115c)의 최대 지름이 내경이 된다. The inner ring accommodating portion 125 is formed in a radially extended form, and an inner ring accommodating tapered portion 125c whose radius decreases as it approaches the outer diameter is formed outside the radial direction, and the inner ring accommodating taper portion 125c is formed. The inner ring accommodating extension 125a extending outward from the outer end of the to the inner ring raceway groove 123 and having a diameter equal to the width of the inner ring raceway groove 123 or smaller than the width of the inner ring raceway groove 123 is formed. In the inner ring accommodating portion 125 inside the inner ring accommodating tapered portion 125c, the maximum diameter of the outer ring accommodating tapered portion 115c becomes the inner diameter.

상기 외륜수용부(115)에는 외륜커버(130)의 내측으로 공기로 수용된 중공체인 외륜수용팽창부재(131)가 구비된다. 상기 외륜수용팽창부재(131)의 반경 방향 내측으로 그리스가 충진 수용된다. 상기 내륜수용부(125)에는 내륜커버(140)의 외측으로 내측이 공기가 수용된 중공체인 내륜수용팽창부재(141)가 구비된다. 상기 내륜수용팽창부재(141)의 반경 방향 외측으로 그리스가 충진 수용된다. 외륜수용팽창부재(131)와 내륜수용팽창부재(141)는 수축 팽창하기 쉬운 재질(예, 두께가 얇은 고무)로 제조될 수 있다. The outer ring accommodating part 115 is provided with an outer ring accommodating expansion member 131 which is a hollow body accommodated in the air inside the outer ring cover 130 . Grease is filled and accommodated in the radial direction of the outer ring accommodating expansion member 131 . The inner ring accommodating part 125 is provided with an inner ring accommodating expansion member 141 which is a hollow body in which air is accommodated on the outside of the inner ring cover 140 . Grease is filled and accommodated in the radial direction of the inner ring receiving expansion member 141 . The outer ring accommodating expandable member 131 and the inner ring accommodating expandable member 141 may be made of a material (eg, thin rubber) that is easily contracted and expanded.

베어링이 작동하여 온도가 상승하면, 외륜수용팽창부재(131)와 내륜수용팽창부재(141)가 팽창하면서 외륜수용부(115)와 내륜수용부(125)에 충진된 그리스를 궤도부로 밀어 배출시킨다. 따라서 고속회전 등과 같은 온도 상승하기 쉬운 가혹한 조건에서는 궤도부로 더 많은 그리스가 공급될 수 있다. When the bearing operates and the temperature rises, the outer ring accommodating expandable member 131 and the inner ring accommodating expandable member 141 expand, and the grease filled in the outer ring accommodating part 115 and the inner ring accommodating part 125 is pushed into the raceway and discharged. . Therefore, more grease can be supplied to the raceway under severe conditions, such as high-speed rotation, where temperature tends to rise.

상기 내륜수용연장부(125a)의 외측 단부와 외륜수용연장부(115a)의 내측 단부는 서로 마주한다. 따라서 반경 방향 내외측에서 동시에 마주하여 궤도부로 그리스가 공급되므로, 전동체(150)는 반경 방향 내외측에서 충분히 윤활된 상태로 전동되므로 수명이 더욱더 연장될 수 있다.The outer end of the inner ring accommodating extension 125a and the inner end of the outer ring accommodating extension 115a face each other. Therefore, since the grease is supplied to the raceway while facing the inner and outer sides in the radial direction, the rolling element 150 is rotated in a sufficiently lubricated state from the inner and outer sides in the radial direction, so that the life can be further extended.

100: 장수명 크로스 롤러 베어링 110: 외륜
111: 외륜궤도 113: 외륜궤도홈
115: 외륜수용부 120: 내륜
121: 내륜궤도 123: 내륜궤도홈
125: 내륜수용부 130: 전동체
130: 외륜커버 140: 내륜커버100: long life cross roller bearing 110: outer ring
111: outer ring raceway 113: outer ring raceway groove
115: outer ring receiving part 120: inner ring
121: inner ring raceway 123: inner ring raceway groove
125: inner ring receiving part 130: rolling element
130: outer ring cover 140: inner ring cover

Claims (5)

내경측에 외륜궤도(111)가 형성된 외륜(110)과, 상기 외륜(110)의 내측에 위치하며 외경측에 상기 외륜궤도(111)와 함께 궤도부를 형성하는 내륜궤도(121)가 형성된 내륜(120)과, 상기 궤도부를 따라 지그재그로 정렬된 복수의 전동체(150)를 포함하며;
상기 외륜궤도(111)에는 그 중심부에 오목하게 형성된 외륜궤도홈(113)이 원주 방향을 따라 연장되어 형성되고, 원주 방향을 따라 이격되어 그리스가 수용되는 복수의 외륜수용부(115)가 형성되며; 상기 외륜수용부(115)는 내측 단부가 외륜궤도홈(113)으로 연통되고 외측은 외륜외경면으로 개구되며, 외륜외경면으로 개구된 개구단부를 막는 외륜커버(130)가 더 포함된 것을 특징으로 하는 장수명 크로스 롤러 베어링(100).An outer ring 110 having an outer ring track 111 formed on the inner diameter side, and an inner ring having an inner ring track 121 positioned inside the outer ring 110 and forming a track part together with the outer ring track 111 on the outer diameter side ( 120) and a plurality of rolling elements 150 arranged in a zigzag along the track portion;
In the outer ring track 111, an outer ring track groove 113 concavely formed in the center thereof is formed to extend along the circumferential direction, and a plurality of outer ring accommodating portions 115 for accommodating grease are formed and spaced apart along the circumferential direction. ; The outer ring receiving part 115 has an inner end that communicates with the outer ring raceway groove 113, and the outer ring is opened to the outer ring outer diameter surface, and the outer ring cover 130 is further included to block the open end opened to the outer ring outer diameter surface. Long-life crossed roller bearings (100). 제1 항에 있어서, 상기 내륜궤도(121)에는 그 중심부에 오목하게 형성된 내륜궤도홈(123)이 원주 방향을 따라 연장되어 형성되고, 원주 방향을 따라 이격되어 그리스가 수용된 복수의 내륜수용부(125)가 형성되며; 상기 내륜수용부(125)는 외측 단부가 내륜궤도홈(123)으로 연통되고 내측은 내륜내경면으로 개구되며, 내륜내경면으로 개구된 개구단부를 막는 내륜커버(140)가 더 포함된 것을 특징으로 하는 장수명 크로스 롤러 베어링(100).According to claim 1, wherein the inner raceway (121) is formed with an inner raceway groove (123) concavely formed in the center of the inner ring extending along the circumferential direction, spaced apart along the circumferential direction a plurality of inner ring accommodating portion ( 125) is formed; The inner ring receiving part 125 has an inner ring cover 140 whose outer end communicates with the inner ring raceway groove 123, and the inner side is opened to the inner ring inner diameter surface, and an inner ring cover 140 to block the open end opened to the inner ring inner diameter surface. Long-life crossed roller bearings (100). 제1 항에 있어서, 상기 외륜수용부는 반경 방향으로 연장된 형태로 형성되고, 반경 방향 내측에 내경 쪽으로 가까워질수록 반지름이 감소하는 외륜수용테이퍼부가 형성되고, 상기 외륜수용테이퍼부의 내측 단부로부터 외륜궤도홈까지 내향 연장되며 외륜궤도홈의 폭과 같거나 외륜궤도홈의 폭보다 작은 지름을 가지는 외륜수용연장부가 형성된 것을 특징으로 하는 장수명 크로스 롤러 베어링.According to claim 1, wherein the outer ring accommodating portion is formed in a radially extending form, the outer ring receiving tapered portion is formed in the radial direction as the radius decreases as it approaches the inner diameter, the outer ring track from the inner end of the outer ring accommodating taper portion A long-life cross roller bearing, characterized in that it has an outer ring receiving extension extending inward to the groove and having a diameter equal to the width of the outer ring raceway groove or smaller than the width of the outer ring raceway groove. 제2 항에 있어서, 상기 외륜수용부(115)는 반경 방향으로 연장된 형태로 형성되고, 반경 방향 내측에 내경 쪽으로 가까워질수록 반지름이 감소하는 외륜수용테이퍼부(115c)가 형성되고, 상기 외륜수용테이퍼부(115c)의 내측 단부로부터 외륜궤도홈(113)까지 내향 연장되며 외륜궤도홈(113)의 폭과 같거나 외륜궤도홈(113)의 폭보다 작은 지름을 가지는 외륜수용연장부(115a)가 형성되며;
상기 내륜수용부(125)는 반경 방향으로 연장된 형태로 형성되고, 반경 방향 외측에 외경 쪽으로 가까워질수록 반지름이 감소하는 내륜수용테이퍼부(125c)가 형성되고, 상기 내륜수용테이퍼부(125c)의 외측 단부로부터 내륜궤도홈(123)까지 외향 연장되며 내륜궤도홈(123)의 폭과 같거나 내륜궤도홈(123)의 폭보다 작은 지름을 가지는 내륜수용연장부(125a)가 형성되며;
상기 내륜수용연장부(125a)의 외측 단부와 외륜수용연장부(115a)의 내측 단부는 서로 마주하여, 반경 방향 내외측에서 마주하여 궤도부로 그리스가 공급되는 것을 특징으로 하는 장수명 크로스 롤러 베어링(100).According to claim 2, wherein the outer ring accommodating portion 115 is formed in a radially extending form, the outer ring receiving tapered portion (115c), the radius of which decreases as it approaches the inner diameter in the radial direction, is formed, and the outer ring The outer ring receiving extension portion 115a extends inwardly from the inner end of the receiving tapered portion 115c to the outer ring raceway groove 113 and has a diameter equal to the width of the outer ring raceway groove 113 or smaller than the width of the outer ring raceway groove 113 . ) is formed;
The inner ring accommodating portion 125 is formed in a radially extended form, and an inner ring accommodating tapered portion 125c whose radius decreases as it approaches the outer diameter is formed outside the radial direction, and the inner ring accommodating taper portion 125c is formed. The inner ring receiving extension 125a extending outwardly from the outer end of the inner ring raceway groove 123 and having a diameter equal to the width of the inner ring raceway groove 123 or smaller than the width of the inner ring raceway groove 123 is formed;
The outer end of the inner ring accommodating extension 125a and the inner end of the outer ring accommodating extension 115a face each other, and the grease is supplied to the raceway while facing each other from the inner and outer sides in the radial direction. ). 제4 항에 있어서, 상기 외륜수용부(115)에는 외륜커버(130)의 내측으로 중공체인 외륜수용팽창부재(131)가 더 구비되고, 상기 내륜수용부(125)에는 내륜커버(140)의 외측으로 중공체인 내륜수용팽창부재(141)가 더 구비된 것을 특징으로 하는 장수명 크로스 롤러 베어링(100).5. The method of claim 4, wherein the outer ring accommodating part 115 is further provided with a hollow outer ring accommodating expansion member 131 inside the outer ring cover 130, and the inner ring accommodating part 125 includes the inner ring cover 140. Long-life cross roller bearing 100, characterized in that the expansion member 141 for accommodating the inner ring, which is a hollow body, is further provided to the outside.
KR1020200116649A 2020-09-11 2020-09-11 Cross Roller Bearing Of Long Life Span KR102474414B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1101961B1 (en) * 1999-06-04 2006-01-04 Vladislav Vladimirovich Smolyaninov Ultrahigh-speed universal roller bearing
JP2009047266A (en) * 2007-08-21 2009-03-05 Jtekt Corp Rolling bearing device
KR20110093644A (en) 2010-02-10 2011-08-18 가부시키가이샤 하모닉 드라이브 시스템즈 Crossed roller bearing retainer and crossed roller bearing
JP2014059025A (en) * 2012-09-19 2014-04-03 Ntn Corp Bearing for wind power/tidal power generation
CN207945202U (en) * 2018-02-09 2018-10-09 瓦房店欧德轴承制造有限公司 Cylinder roller bearing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1101961B1 (en) * 1999-06-04 2006-01-04 Vladislav Vladimirovich Smolyaninov Ultrahigh-speed universal roller bearing
JP2009047266A (en) * 2007-08-21 2009-03-05 Jtekt Corp Rolling bearing device
KR20110093644A (en) 2010-02-10 2011-08-18 가부시키가이샤 하모닉 드라이브 시스템즈 Crossed roller bearing retainer and crossed roller bearing
JP2014059025A (en) * 2012-09-19 2014-04-03 Ntn Corp Bearing for wind power/tidal power generation
CN207945202U (en) * 2018-02-09 2018-10-09 瓦房店欧德轴承制造有限公司 Cylinder roller bearing

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