WO2012148058A1 - Linear bearing - Google Patents

Linear bearing Download PDF

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Publication number
WO2012148058A1
WO2012148058A1 PCT/KR2011/008960 KR2011008960W WO2012148058A1 WO 2012148058 A1 WO2012148058 A1 WO 2012148058A1 KR 2011008960 W KR2011008960 W KR 2011008960W WO 2012148058 A1 WO2012148058 A1 WO 2012148058A1
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WO
WIPO (PCT)
Prior art keywords
cage
outer cylinder
linear bearing
ball
track
Prior art date
Application number
PCT/KR2011/008960
Other languages
French (fr)
Korean (ko)
Inventor
홍의택
Original Assignee
Hong Eu-Taek
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Publication date
Application filed by Hong Eu-Taek filed Critical Hong Eu-Taek
Publication of WO2012148058A1 publication Critical patent/WO2012148058A1/en

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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
    • F16C31/00—Bearings for parts which both rotate and move linearly
    • F16C31/04—Ball or roller bearings
    • 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
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • 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
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F16C29/068—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track
    • F16C29/0683—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque
    • F16C29/0685—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque with balls
    • F16C29/0688—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque with balls whereby a sleeve surrounds the circulating balls and thicker part of the sleeve form the load bearing tracks
    • 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
    • F16C33/38—Ball cages

Definitions

  • the present invention relates to a linear bearing, and more particularly, a ball is provided between the outer cylinder and the cage, the track is formed in the cage in a track shape, the ball is seated on the track formed in the cage, the ball is this track
  • the present invention relates to a linear bearing capable of maintaining precision even in long-term use by rotating in a fluid manner according to a high speed precision movement naturally.
  • the linear bearing is a linear guide of various transport mechanisms connected to the slide block by sliding along a shaft fixedly installed between the left and right support pieces, and a ball bush in the block is formed in the outer cylinder and the outer cylinder. It is composed of a number of balls (Ball) which is tightly coupled to the cage to be inserted and fixed and the ball cage of the cage protrudes inside the through hole.
  • Ball a number of balls
  • the cage installed inside the outer cylinder is fixed by using a snap ring fixed to the outer cylinder, so that the cage rotates in the outer cylinder in the process of sliding the shaft in a linear direction, so the friction resistance between the shaft and the ball is large, bearing There was a problem that the parts and the like are damaged.
  • the present invention has been made in order to solve the above-mentioned conventional problems, the stepped bent inwardly formed on one side of the outer cylinder and the other end while supporting the one end of the cage accommodated inwardly of the outer cylinder
  • the purpose of the cage can be easily assembled and at the same time to maintain the cage firmly fixed.
  • a plurality of binding grooves are formed in the step of the outer cylinder, and by forming a binding protrusion fitted into the binding groove in the cage, the cage is securely bound to the outer cylinder and the cage is prevented from flowing after the binding.
  • the purpose of this is to prevent the occurrence of breakage and the like.
  • the present invention for achieving the above object is characterized by consisting of an outer cylinder, a cage installed inside the outer cylinder, and a ball installed on the outside of the cage.
  • the outer cylinder is formed in a cylindrical shape, characterized in that the stepped bent toward the inside on any one side of both sides is formed.
  • the step of the outer cylinder is characterized in that a plurality of binding grooves are formed.
  • the cage is coupled to the inside of the outer cylinder, one side is supported on the step of the outer cylinder, the other side is characterized in that the support is fixed by a snap ring coupled to the outer cylinder.
  • the cage has a plurality of endless tracks formed in a track shape on the outer peripheral surface in the longitudinal direction, the endless track is characterized in that the through-hole penetrating the inner peripheral surface of the cage is formed.
  • the inclined surface is formed on the straight surface of the other side portion in which the through hole is formed among the straight surfaces of the endless track.
  • the one side of the cage is characterized in that the binding projection is fixed to the binding groove of the outer cylinder.
  • the ball is seated in a plurality of tracks of the cage, characterized in that the portion is provided to protrude into the cage through the through hole of the track.
  • a stepped bent inwardly is formed at one side of the outer cylinder, and one side of the outer cylinder supports the one side of the cage accommodated inwardly of the outer cylinder and the other side is fixed to the cage by using a snap ring. At the same time the assembly is made easy and there is an effect to keep the cage firmly fixed.
  • a plurality of binding grooves are formed in the step of the outer cylinder, and by forming a binding protrusion fitted into the binding groove in the cage, the cage is securely bound to the outer cylinder and the cage is prevented from flowing after the binding. There is an effect to prevent the occurrence of breakage, and the like.
  • FIG. 1 is a perspective view showing a linear bearing according to the present invention.
  • Figure 2 is an exploded view showing a linear bearing according to the present invention.
  • Figure 3 is a cross-sectional view showing a linear bearing in accordance with the present invention.
  • FIG. 4 is a cross-sectional view taken along the line A-A of FIG.
  • FIG. 5 is a view showing the working relationship of the linear bearing according to the present invention.
  • FIG. 1 is a perspective view showing a linear bearing according to the present invention
  • FIG. 2 is an exploded view showing a linear bearing according to the present invention
  • FIG. 3 is a sectional view showing a coupled state of the linear bearing according to the present invention
  • FIG. It is AA sectional drawing.
  • the linear bearing 100 according to the present invention is provided with an outer cylinder 110 formed in a cylindrical shape.
  • the outer cylinder 110 has a stepped portion 112 is formed to be bent inward to one side formed in a cylindrical shape, and the snap ring 120 is fixed to the other inner peripheral surface of the outer cylinder in which the stepped 112 is formed Grooves 116 are formed.
  • a binding groove 114 is formed on the inner circumferential surface of the step 112 of the outer cylinder 110 to be opened inward, and the binding groove 114 is formed in pairs or several pairs to correspond to each other.
  • a plurality of support protrusions 118 protruding inward are formed on the inner circumferential surface of the outer cylinder 110.
  • the cage 210 is fixedly coupled to the inner side of the outer cylinder 110 and formed in a tubular shape so that the cage 210 is fixedly coupled to the outer cylinder 110.
  • the cage 210 is supported and fixed by the snap ring 120, one side is supported on the stepped portion 112 of the outer cylinder 110, the other side is bound to the fixing groove 116 formed inside the outer cylinder (110). do.
  • a binding protrusion 216 is formed to protrude from the binding groove 114 formed in the step 112 of the outer cylinder 110.
  • the outer circumferential surface of the cage 210 is formed with a plurality of endless tracks 212 formed in an elliptical shape, that is, a track shape in the longitudinal direction, and the endless track 212 has a through hole connected to the inside of the cage 210 ( 214 is formed.
  • the through hole 214 is formed to correspond to the plurality of support protrusions 118 formed on the inner peripheral surface of the outer cylinder (110).
  • the caterpillar 212 has a pair of straight surfaces 212a formed to correspond in the longitudinal direction, and an elliptical surface 212b is formed to connect both ends of the straight surfaces 212a to each other.
  • the through hole 214 is formed in the straight surface 212a of any one of 212a.
  • the cage 210 is preferably made of a copper alloy having excellent strength even at high temperatures.
  • the copper alloy has a characteristic of increasing the strength and wear resistance, heat resistance and the like by increasing the aging reinforcement by the subsequent aging treatment and the solid solution content of Sn by using a brass or bronze, etc., thereby improving productivity.
  • a plurality of balls 310 are installed on the endless track 212 of the cage 210 to be seated.
  • a part of the plurality of balls 310 seated on the track 212 of the cage 210 that is, on the straight surface 212a in which the through hole 214 is formed among the straight surfaces 212a of the track 212.
  • the ball 310 positioned is supported by the support protrusion 118 formed on the inner circumferential surface of the outer cylinder 110 to protrude to the inner circumferential surface of the cage 210 so as to contact the outer circumferential surface of the shaft 102 through the through hole 214.
  • a part of the ball 310 protrudes inwardly through the through hole 214 of the cage 210 to be in contact with the shaft fastened to the inner circumferential surface of the cage 210.
  • FIG. 5 is a view showing the working relationship of the linear bearing according to the present invention.
  • the shaft 102 is fixedly coupled to penetrate the cage 210 of the bearing 100, and the shaft (according to the installation direction of the shaft 102) 102 or the bearing 100 performs a linear motion in a horizontal direction or a linear motion in a vertical direction.
  • the cage 102 may move to the left, right, up, or down according to the installation direction of the shaft 102.
  • the ball 310 provided in the caterpillar 212 of the 210 is free to rotate along the moving direction of the shaft 102, so that the shaft 102 can move smoothly in the desired direction.
  • the shaft 102 to which the bearing 100 is fastened is made in the same way that the shaft 102 moves when moving to the left, right or up and down of the bearing 100 in a fixed state.
  • the ball 310 is the cage protruding into the through hole 214 of the cage 210 in contact with the shaft 102 to roll the cage
  • the movement of the shaft 102 is guided by turning the track-shaped caterpillar 212 formed at 210.
  • the inclined surface 212c is formed on the other side of the straight surface 212a which is in contact with the shaft 102, so that the through hole 214 is formed.
  • the friction between the ball 310 and the neighboring ball 310 is less, the endless track formed with the inclined surface 212c
  • the stepped 112 is formed in the outer cylinder 110, and the inner circumferential surface of the stepped 112 is formed with a binding groove 114 is opened inward, the binding projection 216 of the cage 210 is a binding groove.
  • the present invention relates to a linear bearing, and more particularly, a ball is provided between the outer cylinder and the cage, the track is formed in the cage in a track shape, the ball is seated on the track formed in the cage, the ball is this track
  • the present invention relates to a linear bearing capable of maintaining precision even in long-term use by rotating in a fluid manner according to a high speed precision movement naturally.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bearings For Parts Moving Linearly (AREA)

Abstract

The present invention relates to a linear bearing, and more particularly, to a linear bearing that retains precision even over a long period of use, by having a ball between an outer shell and a cage and a track-shaped path formed on the cage, wherein the ball is seated in the path formed on the cage, and the ball moves along the path, such that the bearing rotates naturally and fluidly according to the high-speed, precise movement of the ball. To this end, the linear bearing of the present invention comprises: an outer shell, a cage installed within said outer shell, and a ball installed on the outside of said cage.

Description

리니어 베어링Linear bearing
본 발명은 리니어 베어링에 관한 것으로, 보다 상세하게는 외통과 케이지의 사이에 볼이 구비되되, 케이지에 트랙 형상으로 형성된 궤적이 형성되고, 이 케이지에 형성된 궤적에 볼이 안착되며, 볼은 이 궤적을 따라 움직이도록 하여 자연스럽게 고속 정밀 움직임에 따라 유동적으로 회전함으로써, 장시간 사용에도 정밀도를 유지할 수 있도록 한 리니어 베어링에 관한 것이다.The present invention relates to a linear bearing, and more particularly, a ball is provided between the outer cylinder and the cage, the track is formed in the cage in a track shape, the ball is seated on the track formed in the cage, the ball is this track The present invention relates to a linear bearing capable of maintaining precision even in long-term use by rotating in a fluid manner according to a high speed precision movement naturally.
일반적으로 리니어 베어링은 좌, 우지지편 사이에 고정설치되는 샤프트를 따라 슬라이딩 작동하여 슬라이드 블럭에 연결고정되는 각종 이송기구를 직선안내하는 것으로서, 블럭 내에 갖는 볼부시(Ball Bush)는 외통과 상기 외통 내에 삽입 고정되는 케이지 및 상기 케이지의 볼수장실에 촘촘히 결합되어 통공 내측으로 일부가 돌출되는 무수한 볼(Ball)로 구성된다.In general, the linear bearing is a linear guide of various transport mechanisms connected to the slide block by sliding along a shaft fixedly installed between the left and right support pieces, and a ball bush in the block is formed in the outer cylinder and the outer cylinder. It is composed of a number of balls (Ball) which is tightly coupled to the cage to be inserted and fixed and the ball cage of the cage protrudes inside the through hole.
그러나, 케이지에 설치되는 볼은 갯수가 적거나 또는 볼의 갯수가 많다 하더라도 그 볼이 외통과 샤프트 사이에서 적절한 접촉이 이루어지지 못할 경우, 또는 주위의 방해로 볼의 구름작용이 원활하게 이루어지지 못할 경우, 그리고 샤프트의 직경대비 볼의 크기가 적절하지 못할 경우 슬라이딩 작동시 심한 소음이 발생하고 또는 볼의 구름작용이 원활하게 이루어질 수가 없으며 볼의 편마모로 인하여 사용수명이 단축되는 등의 문제점들이 있었다.However, even if the number of balls installed in the cage is small or the number of balls is insufficient, the balls cannot be smoothly clouded due to the lack of proper contact between the outer cylinder and the shaft or by the disturbance of the surroundings. In this case, when the size of the ball is not appropriate to the diameter of the shaft, there is a problem that severe noise occurs during the sliding operation or the rolling action of the ball cannot be made smoothly, and the service life is shortened due to the wear of the ball.
또한, 외통의 내측에 설치되는 케이지는 외통에 고정되는 스냅링을 이용하여 고정함으로써, 샤프트를 직선 방향으로 슬라이드 동작시키는 과정에서 케이지가 외통 내에서 회전을 하게 되어 샤프트와 볼과의 마찰 저항이 커 베어링의 부품 등이 손상되는 문제점이 있었다.In addition, the cage installed inside the outer cylinder is fixed by using a snap ring fixed to the outer cylinder, so that the cage rotates in the outer cylinder in the process of sliding the shaft in a linear direction, so the friction resistance between the shaft and the ball is large, bearing There was a problem that the parts and the like are damaged.
본 발명은 상기한 종래의 문제점을 해결하기 위하여 안출된 것으로, 외통의 일측부에 내측으로 절곡된 단턱이 형성되고 외통의 내측으로 수용되는 케이지의 일측을 외통의 단턱이 지지함과 동시에 타측부는 스냅링을 이용하여 케이지를 고정시킴으로써, 케이지의 조립이 용이하게 이루어짐과 동시에 견고하게 케이지가 고정된 상태를 유지할 수 있도록 하는데 그 목적이 있다.The present invention has been made in order to solve the above-mentioned conventional problems, the stepped bent inwardly formed on one side of the outer cylinder and the other end while supporting the one end of the cage accommodated inwardly of the outer cylinder By fixing the cage using a snap ring, the purpose of the cage can be easily assembled and at the same time to maintain the cage firmly fixed.
또한, 외통의 단턱에 다수개의 결속홈이 형성되고, 케이지에는 이 결속홈에 끼워지는 결속돌기를 형성함으로써, 외통에 케이지가 안전하게 결속된 상태를 유지함과 동시에 결속 후 케이지가 유동하는 것을 방지하여 부품의 파손 등이 발생하는 것을 방지할 수 있도록 하는데 그 목적이 있다.In addition, a plurality of binding grooves are formed in the step of the outer cylinder, and by forming a binding protrusion fitted into the binding groove in the cage, the cage is securely bound to the outer cylinder and the cage is prevented from flowing after the binding. The purpose of this is to prevent the occurrence of breakage and the like.
상기한 목적을 달성하기 위한 본 발명은 외통과, 상기 외통의 내측에 설치되는 케이지와, 상기 케이지의 외측에 설치되는 볼로 이루어진 것을 특징으로 한다.The present invention for achieving the above object is characterized by consisting of an outer cylinder, a cage installed inside the outer cylinder, and a ball installed on the outside of the cage.
여기서, 상기 외통은 원통 형상으로 형성되고, 양측부 중 어느 일측부에는 내측을 향하도록 절곡된 단턱이 형성된 것을 특징으로 한다.Here, the outer cylinder is formed in a cylindrical shape, characterized in that the stepped bent toward the inside on any one side of both sides is formed.
나아가, 상기 외통의 단턱에는 다수개의 결속홈이 형성된 것을 특징으로 한다.Furthermore, the step of the outer cylinder is characterized in that a plurality of binding grooves are formed.
그리고, 상기 케이지는 외통의 내측에 결합되되, 일측은 외통의 단턱에 지지되고, 타측부는 외통에 결합 고정되는 스냅링에 의해 지지 고정된 것을 특징으로 한다.And, the cage is coupled to the inside of the outer cylinder, one side is supported on the step of the outer cylinder, the other side is characterized in that the support is fixed by a snap ring coupled to the outer cylinder.
또한, 상기 케이지는 길이 방향 외주면에 트랙형상으로 다수개의 무한궤도가 형성되고, 상기 무한궤도에는 케이지의 내주면을 관통하는 통공이 형성된 것을 특징으로 한다.In addition, the cage has a plurality of endless tracks formed in a track shape on the outer peripheral surface in the longitudinal direction, the endless track is characterized in that the through-hole penetrating the inner peripheral surface of the cage is formed.
여기서, 상기 무한궤도의 직선면 중 통공이 형성된 타측부의 직선면은 경사면이 형성된 것을 특징으로 한다.Here, the inclined surface is formed on the straight surface of the other side portion in which the through hole is formed among the straight surfaces of the endless track.
나아가, 상기 케이지의 일측부에는 외통의 결속홈에 결속 고정되는 결속돌기가 형성된 것을 특징으로 한다.Further, the one side of the cage is characterized in that the binding projection is fixed to the binding groove of the outer cylinder.
또한, 상기 볼은 케이지의 무한궤도에 다수개가 안착되되, 무한궤도의 통공을 통하여 일부가 케이지의 내측으로 돌출되게 구비된 것을 특징으로 한다.In addition, the ball is seated in a plurality of tracks of the cage, characterized in that the portion is provided to protrude into the cage through the through hole of the track.
이와 같이 구성된 본 발명은 외통의 일측부에 내측으로 절곡된 단턱이 형성되고 외통의 내측으로 수용되는 케이지의 일측을 외통의 단턱이 지지함과 동시에 타측부는 스냅링을 이용하여 케이지를 고정시킴으로써, 케이지의 조립이 용이하게 이루어짐과 동시에 견고하게 케이지가 고정된 상태를 유지할 수 있도록 하는 효과가 있다.According to the present invention configured as described above, a stepped bent inwardly is formed at one side of the outer cylinder, and one side of the outer cylinder supports the one side of the cage accommodated inwardly of the outer cylinder and the other side is fixed to the cage by using a snap ring. At the same time the assembly is made easy and there is an effect to keep the cage firmly fixed.
또한, 외통의 단턱에 다수개의 결속홈이 형성되고, 케이지에는 이 결속홈에 끼워지는 결속돌기를 형성함으로써, 외통에 케이지가 안전하게 결속된 상태를 유지함과 동시에 결속 후 케이지가 유동하는 것을 방지하여 부품의 파손 등이 발생하는 것을 방지할 수 있도록 하는 효과가 있다.In addition, a plurality of binding grooves are formed in the step of the outer cylinder, and by forming a binding protrusion fitted into the binding groove in the cage, the cage is securely bound to the outer cylinder and the cage is prevented from flowing after the binding. There is an effect to prevent the occurrence of breakage, and the like.
도 1은 본 발명에 따른 리니어 베어링을 보인 사시도.1 is a perspective view showing a linear bearing according to the present invention.
도 2는 본 발명에 따른 리니어 베어링을 보인 분리도.Figure 2 is an exploded view showing a linear bearing according to the present invention.
도 3은 본 발명에 따른 리니어 베어링을 보인 결합상태 단면도.Figure 3 is a cross-sectional view showing a linear bearing in accordance with the present invention.
도 4는 도 3 의 A-A선 단면도.4 is a cross-sectional view taken along the line A-A of FIG.
도 5는 본 발명에 따른 리니어 베어링의 작용관계를 보인 도면.5 is a view showing the working relationship of the linear bearing according to the present invention.
이하, 본 발명에 따른 리니어 베어링에 대하여 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, a linear bearing according to the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명에 따른 리니어 베어링을 보인 사시도이고, 도 2는 본 발명에 따른 리니어 베어링을 보인 분리도이고, 도 3은 본 발명에 따른 리니어 베어링을 보인 결합상태 단면도이고, 도 4는 도 3 의 A-A선 단면도이다.1 is a perspective view showing a linear bearing according to the present invention, FIG. 2 is an exploded view showing a linear bearing according to the present invention, FIG. 3 is a sectional view showing a coupled state of the linear bearing according to the present invention, and FIG. It is AA sectional drawing.
도 1 내지 도 4에 도시된 바와 같이 본 발명에 따른 리니어 베어링(100)은 원통 형상으로 형성된 외통(110)이 구비된다.1 to 4, the linear bearing 100 according to the present invention is provided with an outer cylinder 110 formed in a cylindrical shape.
여기서, 상기 외통(110)은 원통 형상으로 형성된 일측부에 내측을 향하도록 절곡되게 단턱(112)이 형성되고, 이 단턱(112)이 형성된 외통의 타측 내주면에는 스냅링(120)이 결합 고정되는 고정홈(116)이 형성된다.Here, the outer cylinder 110 has a stepped portion 112 is formed to be bent inward to one side formed in a cylindrical shape, and the snap ring 120 is fixed to the other inner peripheral surface of the outer cylinder in which the stepped 112 is formed Grooves 116 are formed.
나아가, 상기 외통(110)의 단턱(112) 내주면에는 내측으로 개방되는 결속홈(114)이 형성되되, 이 결속홈(114)은 서로 대응되게 한 쌍 또는 여러 쌍이 형성된다.Furthermore, a binding groove 114 is formed on the inner circumferential surface of the step 112 of the outer cylinder 110 to be opened inward, and the binding groove 114 is formed in pairs or several pairs to correspond to each other.
아울러, 상기 외통(110)의 내주면에는 내측으로 돌출된 다수개의 지지돌기(118)가 형성된다.In addition, a plurality of support protrusions 118 protruding inward are formed on the inner circumferential surface of the outer cylinder 110.
그리고, 상기 외통(110)의 내측에 결합 고정되되, 관 형상으로 형성되어 외통(110)에 결합 고정되는 케이지(210)가 구비된다.The cage 210 is fixedly coupled to the inner side of the outer cylinder 110 and formed in a tubular shape so that the cage 210 is fixedly coupled to the outer cylinder 110.
여기서, 상기 케이지(210)는 일측부는 외통(110)의 단턱(112)에 지지되고, 타측부는 외통(110)의 내측에 형성된 고정홈(116)에 결속되는 스냅링(120)에 의해 지지 고정된다.Here, the cage 210 is supported and fixed by the snap ring 120, one side is supported on the stepped portion 112 of the outer cylinder 110, the other side is bound to the fixing groove 116 formed inside the outer cylinder (110). do.
나아가, 상기 케이지(210)에는 외통(110)의 단턱(112)에 형성된 결속홈(114)에 결속 고정되는 결속돌기(216)가 돌출 형성된다.Further, in the cage 210, a binding protrusion 216 is formed to protrude from the binding groove 114 formed in the step 112 of the outer cylinder 110.
아울러, 상기 케이지(210)의 외주면에는 길이 방향으로 타원 형상, 즉 트랙형상으로 형성된 다수개의 무한궤도(212)가 형성되고, 이 무한궤도(212)에는 케이지(210)의 내측과 연결되는 통공(214)이 형성된다.In addition, the outer circumferential surface of the cage 210 is formed with a plurality of endless tracks 212 formed in an elliptical shape, that is, a track shape in the longitudinal direction, and the endless track 212 has a through hole connected to the inside of the cage 210 ( 214 is formed.
이때, 상기 통공(214)은 외통(110)의 내주면에 형성된 다수개의 지지돌기(118)에 대응되게 형성된다.At this time, the through hole 214 is formed to correspond to the plurality of support protrusions 118 formed on the inner peripheral surface of the outer cylinder (110).
즉, 상기 무한궤도(212)는 길이 방향으로 대응되게 한 쌍의 직선면(212a)이 형성되고, 이 직선면(212a)의 양측 끝단부를 서로 연결시키는 타원면(212b)이 형성되며, 이 직선면(212a) 중 어느 일측의 직선면(212a)에는 통공(214)이 형성된다.That is, the caterpillar 212 has a pair of straight surfaces 212a formed to correspond in the longitudinal direction, and an elliptical surface 212b is formed to connect both ends of the straight surfaces 212a to each other. The through hole 214 is formed in the straight surface 212a of any one of 212a.
이때, 상기 무한궤도(212)에 형성된 한 쌍의 직선면(212a) 중 통공(214)이 형성된 직선면(212a)의 타측부에 형성된 직선면(212a)의 내측 공간이 확장되도록 경사각을 가지는 경사면(212c)이 형성된다.At this time, the inclined surface having an inclination angle such that the inner space of the straight surface 212a formed on the other side of the straight surface 212a in which the through hole 214 is formed among the pair of straight surfaces 212a formed in the endless track 212 is expanded. 212c is formed.
한편, 상기 케이지(210)는 고온에서도 우수한 강도를 갖는 동합금으로 제작하는 것이 바람직하다.On the other hand, the cage 210 is preferably made of a copper alloy having excellent strength even at high temperatures.
여기서, 동합금은 황동 또는 청동등을 사용함으로써, 후속시효 처리에 의한 시효강화와 Sn의 고용 함량을 높여 강도와 내 마모성 내열성등을 증가시키고, 생산성을 향상시킬 수 있는 특성이 있다.Here, the copper alloy has a characteristic of increasing the strength and wear resistance, heat resistance and the like by increasing the aging reinforcement by the subsequent aging treatment and the solid solution content of Sn by using a brass or bronze, etc., thereby improving productivity.
또한, 상기 외통(110)의 내주면에 위치되되, 케이지(210)의 무한궤도(212)에는 다수개의 볼(310)이 안착되게 설치된다.In addition, it is located on the inner circumferential surface of the outer cylinder 110, a plurality of balls 310 are installed on the endless track 212 of the cage 210 to be seated.
이때, 상기 케이지(210)의 무한궤도(212)에 안착된 다수개의 볼(310) 중 일부, 즉 무한궤도(212)의 직선면(212a) 중 통공(214)이 형성된 직선면(212a)에 위치한 볼(310)은 외통(110)의 내주면에 형성된 지지돌기(118)에 의해 지지되어 통공(214)을 통하여 샤프트(102)의 외주면에 접촉할 수 있도록 케이지(210)의 내주면으로 돌출되게 구비된다.At this time, a part of the plurality of balls 310 seated on the track 212 of the cage 210, that is, on the straight surface 212a in which the through hole 214 is formed among the straight surfaces 212a of the track 212. The ball 310 positioned is supported by the support protrusion 118 formed on the inner circumferential surface of the outer cylinder 110 to protrude to the inner circumferential surface of the cage 210 so as to contact the outer circumferential surface of the shaft 102 through the through hole 214. do.
따라서, 상기 케이지(210)의 통공(214)을 통하여 볼(310)의 일부가 내측으로 돌출되어 케이지(210)의 내주면에 체결되는 샤프트와 접촉되게 된다. Therefore, a part of the ball 310 protrudes inwardly through the through hole 214 of the cage 210 to be in contact with the shaft fastened to the inner circumferential surface of the cage 210.
이와 같이 구성된 본 발명에 따른 리니어 베어링에 대한 작용관계를 설명하면 다음과 같다.Referring to the operational relationship for the linear bearing according to the invention configured as described above are as follows.
도 5는 본 발명에 따른 리니어 베어링의 작용관계를 보인 도면이다.5 is a view showing the working relationship of the linear bearing according to the present invention.
이에 도시된 바와 같이 본 발명에 따른 리니어 베어링(100)은 먼저, 상기 베어링(100)의 케이지(210)에 관통되게 샤프트(102)가 결합 고정되고, 샤프트(102)의 설치 방향에 따라 샤프트(102) 또는 베어링(100)이 수평으로 직선 운동이나 수직방향으로 직선 운동을 수행하게 된다.As shown in the linear bearing 100 according to the present invention, first, the shaft 102 is fixedly coupled to penetrate the cage 210 of the bearing 100, and the shaft (according to the installation direction of the shaft 102) 102 or the bearing 100 performs a linear motion in a horizontal direction or a linear motion in a vertical direction.
즉, 상기 베어링(100)에 샤프트(102)가 체결된 상태에서 샤프트(102)가 직선 운동을 수행하는 경우에는 샤프트(102)의 설치방향에 따라 좌, 우 또는 상, 하로 이동하게 되면 케이지(210)의 무한궤도(212)에 구비된 볼(310)은 샤프트(102)의 이동방향을 따라 자유롭게 회동되게 되어 샤프트(102)는 원활하게 원하는 방향으로 이동할 수 있게 된다.That is, when the shaft 102 performs a linear motion in a state in which the shaft 102 is fastened to the bearing 100, the cage 102 may move to the left, right, up, or down according to the installation direction of the shaft 102. The ball 310 provided in the caterpillar 212 of the 210 is free to rotate along the moving direction of the shaft 102, so that the shaft 102 can move smoothly in the desired direction.
또한, 상기 베어링(100)이 체결되는 샤프트(102)는 고정된 상태에서 베어링(100)의 좌, 우 또는 상, 하로 이동하는 경우에는 샤프트(102)가 이동하는 동일한 방법으로 이루어지게 된다.In addition, the shaft 102 to which the bearing 100 is fastened is made in the same way that the shaft 102 moves when moving to the left, right or up and down of the bearing 100 in a fixed state.
여기서, 상기 샤프트(102) 또는 베어링(100)이 직선 방향으로 운동을 수행할 때 볼(310)은 케이지(210)의 통공(214)으로 돌출된 부분이 샤프트(102)에 접촉되어 구르면서 케이지(210)에 형성된 트랙 형상의 무한궤도(212)를 선회하면서 샤프트(102)의 이동을 안내하게 된다.Here, when the shaft 102 or the bearing 100 performs the movement in a linear direction, the ball 310 is the cage protruding into the through hole 214 of the cage 210 in contact with the shaft 102 to roll the cage The movement of the shaft 102 is guided by turning the track-shaped caterpillar 212 formed at 210.
이때, 상기 볼(310)이 케이지(210)의 무한궤도(212)를 선회할 때 샤프트(102)와 접촉되는 타측부 직선면(212a)에는 경사면(212c)이 형성되어 통공(214)이 형성된 직선면(212a)보다 넓게 형성되어 다수개의 볼(310)이 무한궤도(212)를 선회할 때 볼(310)과 이웃하는 볼(310)과의 마찰이 적고, 경사면(212c)이 형성된 무한궤도(212)의 직선면(212a)에 볼(310)이 위치시 원활하게 선회동작을 수행할 수 있게 된다.At this time, when the ball 310 rotates the caterpillar 212 of the cage 210, the inclined surface 212c is formed on the other side of the straight surface 212a which is in contact with the shaft 102, so that the through hole 214 is formed. Wider than the straight surface 212a, when the plurality of balls 310 orbits the track 212, the friction between the ball 310 and the neighboring ball 310 is less, the endless track formed with the inclined surface 212c When the ball 310 is positioned on the straight surface 212a of the 212, it is possible to perform a smooth operation.
또한, 상기 외통(110)에 단턱(112)이 형성되고, 이 단턱(112)의 내주면에는 내측으로 개방되는 결속홈(114)이 형성되어, 케이지(210)의 결속돌기(216)가 결속홈(114)에 결속되도록 하여 케이지(210)의 일측부를 고정시키고, 케이지(210)의 타측부는 스냅링(120)을 이용하여 고정시킴으로써, 베어링(100)을 제작함에 있어 케이지(210)의 조립을 용이하게 수행할 수 있게 된다.In addition, the stepped 112 is formed in the outer cylinder 110, and the inner circumferential surface of the stepped 112 is formed with a binding groove 114 is opened inward, the binding projection 216 of the cage 210 is a binding groove. By binding to the 114 to secure one side of the cage 210, the other side of the cage 210 is fixed using the snap ring 120, in the manufacture of the bearing 100 in the assembly of the cage 210 It can be performed easily.
상기에서는 본 발명에 따른 리니어 베어링에 대한 바람직한 실시예에 대하여 설명하였지만, 본 발명은 이에 한정되는 것이 아니고, 특허청구범위와 발명의 상세한 설명 및 첨부한 도면의 범위 안에서 여러 가지로 변형하여 실시하는 것이 가능하고, 이 또한 본 발명의 권리범위에 속한다. In the above, a preferred embodiment of the linear bearing according to the present invention has been described, but the present invention is not limited thereto, and various modifications are made within the scope of the claims and the detailed description of the invention and the accompanying drawings. It is possible and this also belongs to the scope of the present invention.
본 발명은 리니어 베어링에 관한 것으로, 보다 상세하게는 외통과 케이지의 사이에 볼이 구비되되, 케이지에 트랙 형상으로 형성된 궤적이 형성되고, 이 케이지에 형성된 궤적에 볼이 안착되며, 볼은 이 궤적을 따라 움직이도록 하여 자연스럽게 고속 정밀 움직임에 따라 유동적으로 회전함으로써, 장시간 사용에도 정밀도를 유지할 수 있도록 한 리니어 베어링에 관한 것이다.The present invention relates to a linear bearing, and more particularly, a ball is provided between the outer cylinder and the cage, the track is formed in the cage in a track shape, the ball is seated on the track formed in the cage, the ball is this track The present invention relates to a linear bearing capable of maintaining precision even in long-term use by rotating in a fluid manner according to a high speed precision movement naturally.

Claims (8)

  1. 외통(110)과,Outer cylinder 110,
    상기 외통(110)의 내측에 설치되는 케이지(210)와,A cage 210 installed inside the outer cylinder 110,
    상기 케이지(210)의 외측에 설치되는 볼(310)로 이루어진 것을 특징으로 하는 리니어 베어링.Linear bearing, characterized in that consisting of the ball 310 is installed on the outside of the cage (210).
  2. 제 1 항에 있어서,The method of claim 1,
    상기 외통(110)은 원통 형상으로 형성되고, 양측부 중 어느 일측부에는 내측을 향하도록 절곡된 단턱(112)이 형성된 것을 특징으로 하는 리니어 베어링.The outer cylinder 110 is formed in a cylindrical shape, the linear bearing, characterized in that any one of the side portion is formed with a stepped portion (112) bent toward the inside.
  3. 제 2 항에 있어서,The method of claim 2,
    상기 외통(110)의 단턱(112)에는 다수개의 결속홈(114)이 형성된 것을 특징으로 하는 리니어 베어링.Linear bearing, characterized in that a plurality of engagement grooves (114) are formed in the step (112) of the outer cylinder (110).
  4. 제 1 항에 있어서,The method of claim 1,
    상기 케이지(210)는 외통(110)의 내측에 결합되되, 일측은 외통(110)의 단턱(112)에 지지되고, 타측부는 외통(110)에 결합 고정되는 스냅링(120)에 의해 지지 고정된 것을 특징으로 하는 리니어 베어링.The cage 210 is coupled to the inside of the outer cylinder 110, one side is supported on the stepped 112 of the outer cylinder 110, the other side is fixed and supported by the snap ring 120 is fixed to the outer cylinder 110 Linear bearing characterized in that.
  5. 제 1 항에 있어서,The method of claim 1,
    상기 케이지(210)는 길이 방향 외주면에 트랙형상으로 다수개의 무한궤도(212)가 형성되고, The cage 210 has a plurality of endless tracks 212 are formed in a track shape on the outer peripheral surface in the longitudinal direction,
    상기 무한궤도(212)에는 케이지(210)의 내주면을 관통하는 통공(214)이 형성된 것을 특징으로 하는 리니어 베어링.The crawler 212 is a linear bearing, characterized in that the through-hole 214 penetrating through the inner circumferential surface of the cage 210 is formed.
  6. 제 5 항에 있어서,The method of claim 5,
    상기 무한궤도(212)의 직선면 중 통공(214)이 형성된 타측부의 직선면(212a)은 경사면(212c)이 형성된 것을 특징으로 하는 리니어 베어링.Linear bearing, characterized in that the inclined surface (212c) is formed on the straight surface (212a) of the other side of the linear surface of the endless track 212 is formed through the hole (214).
  7. 제 5 항에 있어서,The method of claim 5,
    상기 케이지(210)의 일측부에는 외통(110)의 결속홈(114)에 결속 고정되는 결속돌기(216)가 형성된 것을 특징으로 하는 리니어 베어링.One side of the cage 210, the linear bearing, characterized in that the binding projection 216 is formed in the binding groove 114 of the outer cylinder (110).
  8. 제 1 항에 있어서,The method of claim 1,
    상기 볼(310)은 케이지(210)의 무한궤도(212)에 다수개가 안착되되, 무한궤도(212)의 통공(214)을 통하여 일부가 케이지(210)의 내측으로 돌출되게 구비된 것을 특징으로 하는 리니어 베어링.The ball 310 is seated in a plurality of tracks 212 of the cage 210, it is characterized in that a part of the ball through the through hole 214 of the track 212 is provided to protrude into the cage 210. Linear bearing.
PCT/KR2011/008960 2011-04-29 2011-11-23 Linear bearing WO2012148058A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2011-0040953 2011-04-29
KR1020110040953A KR101079153B1 (en) 2011-04-29 2011-04-29 A linear bearing

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EP3333438A1 (en) * 2016-12-07 2018-06-13 Aktiebolaget SKF Linear ball bearing cage, housing and method

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US4239299A (en) * 1978-04-04 1980-12-16 Skf Industrial Trading & Development Company B.V. Ball bearing for linear motion
US5829882A (en) * 1996-11-14 1998-11-03 Thomson Ind Inc Linear motion bearing assembly
JP2000257630A (en) * 1999-03-10 2000-09-19 Thk Co Ltd Linear bush assembly
KR200393286Y1 (en) * 2005-05-11 2005-08-22 나산정공 주식회사 Ball bush of slide unit

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EP3333438A1 (en) * 2016-12-07 2018-06-13 Aktiebolaget SKF Linear ball bearing cage, housing and method
CN108167335A (en) * 2016-12-07 2018-06-15 斯凯孚公司 linear ball bearing retainer, seat and method

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