KR200162550Y1 - Ball screw with lubrication and cooling device - Google Patents
Ball screw with lubrication and cooling device Download PDFInfo
- Publication number
- KR200162550Y1 KR200162550Y1 KR2019970024860U KR19970024860U KR200162550Y1 KR 200162550 Y1 KR200162550 Y1 KR 200162550Y1 KR 2019970024860 U KR2019970024860 U KR 2019970024860U KR 19970024860 U KR19970024860 U KR 19970024860U KR 200162550 Y1 KR200162550 Y1 KR 200162550Y1
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- KR
- South Korea
- Prior art keywords
- ball screw
- lubricating oil
- bearing
- conduit
- screw nut
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/12—Arrangements for cooling or lubricating parts of the machine
- B23Q11/121—Arrangements for cooling or lubricating parts of the machine with lubricating effect for reducing friction
- B23Q11/125—Arrangements for cooling or lubricating parts of the machine with lubricating effect for reducing friction for lubricating ball screw systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/22—Feeding members carrying tools or work
- B23Q5/32—Feeding working-spindles
- B23Q5/326—Feeding working-spindles screw-operated
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
본 고안은 볼스크류 축이 고속회전함에 따른 지지 베어링과 볼스크류 너트의 이상 발열을 억제하도록 하는 윤활 및 냉각장치를 갖는 볼스크류에 관한 것으로서, 볼스크류장치에 있어서, 윤활유탱크; 상기 윤활유탱크로부터의 윤활유가 각 베어링 내부로 유입시키도록 분기 형성된 유입관로; 상기 베어링 내의 윤활유가 배출되는 배유관로; 상기 배유관로 상에 분기되고 윤활유탱크에 연결되어 윤활유를 다시 복귀시키는 복귀관로; 윤활유를 각 관로를 통해 순환시키도록 하는 펌핑수단; 및 볼스크류 축에 대한 볼스크류 너트의 운동에 의해 발열되는 마찰부분으로 공급되는 공기를 분사시키도록 상기 볼스크류 너트의 내부와 축으로 향하는 공기로가 형성된 냉각 브래킷을 포함하여 된 것이다.The present invention relates to a ball screw having a lubrication and cooling device for suppressing abnormal heat generation of the support bearing and the ball screw nut as the ball screw shaft rotates at a high speed, the ball screw device comprising: a lubricating oil tank; An inlet pipe branched to allow the lubricant oil from the lubricant tank to flow into each bearing; An oil pipe for discharging the lubricating oil in the bearing; A return conduit branched on the oil conduit and connected to the lubricating oil tank to return the lubricating oil again; Pumping means for circulating lubricating oil through each conduit; And a cooling bracket in which an air path directed toward the shaft and the inside of the ball screw nut is formed so as to inject air supplied to the friction portion generated by the movement of the ball screw nut with respect to the ball screw shaft.
Description
본 고안은 윤활 및 냉각장치를 갖는 볼스크류에 관한 것으로서, 더욱 상세하게는 볼스크류 축이 고속회전함에 따른 지지 베어링과 볼스크류 너트의 이상 발열을 억제하도록 하는 윤활 및 냉각장치를 갖는 볼스크류에 관한 것이다.The present invention relates to a ball screw having a lubrication and cooling device, and more particularly to a ball screw having a lubrication and cooling device to suppress abnormal heat generation of the support bearing and the ball screw nut as the ball screw shaft rotates at high speed. will be.
일반적으로 이송대 유니트는 도 1에서 고정체(1)에 결합되고 구동력 발생과 위치결정을 하는 서보모터(2)와, 상기 서보모터(2)의 구동축(3)과 커플링결합되고 일정길이 방향으로 형성되며, 거의 외주 전부분에 대해 나사홈이 형성된 볼스크류 축(4)과, 상기 볼스크류 축(4)을 지지하고 원활한 회전을 위해 상기 볼스크류 축(4)의 양측에 고정설치되는 베어링(5)과, 상기 볼스크류 축(4)과 나사결합되어 일정 범위에서 직선운동을 하는 볼스크류 너트(6)로 구성되어 있다.In general, the feeder unit is coupled to the stationary body 1 in FIG. 1 and coupled to the drive shaft 3 of the servomotor 2 to generate and position the driving force, and to the predetermined length direction. And a ball screw shaft (4) formed with a screw groove about the entire outer circumference and the ball screw shaft (4) and fixed to both sides of the ball screw shaft (4) for smooth rotation. (5) and a ball screw nut (6) which is screwed with the ball screw shaft (4) and performs a linear movement in a certain range.
또한, 상기 볼스크류 축(4)을 지지하는 베어링(5)은 축(4)의 고속회전시 원할한 회전을 위해 윤활제가 주입될 수 있는 유로(7)가 형성되어 있고, 그 유로(7)는 주입후 마개(8)에 의해 닫혀있다.In addition, the bearing 5 supporting the ball screw shaft 4 is formed with a flow path 7 through which a lubricant can be injected for smooth rotation of the shaft 4 at a high speed. Is closed by a stopper 8 after injection.
그러나 이와같은 종래의 볼스크류 장치에서 서보모터에 의해 볼스크류 축의 회전속도 즉 이송속도를 높이게 될 경우에는 볼스크류 축을 회동지지하는 베어링이 과열되고 이 과열현상이 지속되면 마찰열에 의해 윤활제가 타서 베어링 자체에 손상을 입게 되고, 더욱 심각하게는 볼스크류 너트의 과열로 인해 볼스크류 축이 늘어나게 되어 공작기계 자체의 위치결정 정밀도 및 반복위치 정밀도에 악영향을 끼치게 되었다.However, in such a conventional ball screw device, when the rotational speed or feed rate of the ball screw shaft is increased by the servo motor, the bearing supporting the rotation of the ball screw shaft is overheated. If this overheating phenomenon persists, the lubricant burns due to frictional heat. And, more seriously, the overheating of the ball screw nut causes the ball screw axis to increase, which adversely affects the positioning accuracy and repeatability of the machine tool itself.
따라서, 본 고안은 상기와 같은 제반문제를 해결하기 위해 안출된 것으로서 그 목적은 공작기계의 이송계를 구성하는 요소중 발열의 원인이 되는 볼스크류 지지베어링과 볼스크류 너트에 대해 순환방식에 의한 적절한 윤활 및 냉각수단을 적용하여 볼스크류장치의 신뢰도를 높이도록 하는 윤활 및 냉각장치를 갖는 볼스크류를 제공함에 있다.Therefore, the present invention has been devised to solve the above problems, and its purpose is to provide a ball screw support bearing and a ball screw nut, which are the sources of heat generation, among the elements constituting the feed system of a machine tool. It is to provide a ball screw having a lubrication and cooling device to apply the lubrication and cooling means to increase the reliability of the ball screw device.
상기 목적을 달성하기 위해 안출된 본 고안은, 볼스크류장치에 있어서,The present invention devised to achieve the above object, in the ball screw device,
상기 윤활유탱크로부터의 이 각 지지 베어링 내부로 유입시키도록 분기 형성된 유입관로; 상기 베어링 내의 윤활유이 배출되는 배유관로; 상기 배유관로 상에 분기되고 윤활유탱크에 연결되어 윤활유을 다시 복귀시키는 복귀관로; 윤활유을 각 관로를 통해 순환시키도록 하는 펌핑수단; 및 볼스크류 축에 대한 볼스크류 너트의 운동에 의해 발열되는 마찰부분으로 공급되는 공기를 분사시키도록 상기 볼스크류 너트의 내부와 축으로 향하는 공기로가 형성된 냉각 브래킷을 포함하여 된 특징을 갖는다.An inflow pipe branched to flow into the respective support bearings from the lubricating oil tank; An oil pipe for discharging the lubricating oil in the bearing; A return conduit branched on the oil conduit and connected to a lubricating oil tank to return lubricating oil again; Pumping means for circulating lubricating oil through each conduit; And a cooling bracket formed with an air passage directed toward the shaft and the inside of the ball screw nut to inject the air supplied to the friction portion generated by the movement of the ball screw nut relative to the ball screw shaft.
도 1 은 종래의 볼스크류를 도시한 측단면도.1 is a side cross-sectional view showing a conventional ball screw.
도 2 는 본 고안에 따른 윤활 및 냉각장치를 갖는 볼스크류를 도시한 측단면 도.Figure 2 is a side cross-sectional view showing a ball screw having a lubrication and cooling device according to the present invention.
〈도면의 주요부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>
10: 윤활유 탱크, 11: 베어링,10: lubricant tank, 11: bearings,
12: 유입관로, 13: 유량조절밸브,12: inlet line, 13: flow control valve,
14: 배유관로, 15: 복귀관로,14: drain pipe, 15: return pipe,
16: 펌핑수단, 20: 볼스크류 축,16: pumping means, 20: ball screw shaft,
21: 볼스크류 너트, 22: 공기로,21: ball screw nut, 22: by air,
23: 냉각 브래킷,23: cooling bracket,
이하, 본 고안을 첨부한 도면에 의거하여 보다 상세하게 설명한다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.
도 2 는 본 고안에 따른 윤활 및 냉각장치를 갖는 볼스크류를 도시한 측단면도이다.Figure 2 is a side cross-sectional view showing a ball screw having a lubrication and cooling device according to the present invention.
본 고안의 구성은, 볼스크류장치에 있어서, 일정 용적을 갖는 윤활유탱크(10)와 펌핑수단(16)을 구비한다. 또한, 상기 펌핑수단(16)로부터의 윤활유가 볼스크류 축(20)을 지지하는 각 베어링(11) 내부로 유입되게 유입관로(12)를 분기 형성한다.The ball screw device includes a lubricating oil tank (10) having a constant volume and a pumping means (16). In addition, the inlet conduit 12 is branched so that the lubricating oil from the pumping means 16 flows into each bearing 11 supporting the ball screw shaft 20.
상기 유입관로(12)의 전단에는 공급되는 윤활유의 양을 조절하도록 하는 유량조절밸브(13)가 구성될 수 있다.The front end of the inlet pipe 12 may be a flow rate control valve 13 to adjust the amount of lubricating oil supplied.
한편, 상기 각 베어링(11)내로 유입된 윤활유을 배출시키도록 하는 배유관로(14)를 분기 형성한다. 또한, 상기 배유관로(14)상에 연결되어 윤활유탱크(10)로 윤활유를 다시 복귀시키도록 하는 복귀관로(15)가 구비된다.On the other hand, the branch pipe line 14 to discharge the lubricating oil introduced into each bearing (11). In addition, the return pipe 15 is connected to the oil pipe 14 to return the lubricant back to the lubricant tank 10.
한편, 상기 볼스크류 축(20)에 대한 볼스크류 너트(21)의 접촉운동에 의해 발열되는 마찰부분으로 공급되는 공기를 분사시키도록 상기 볼스크류 너트(21)의 일측단에 공기분사노즐(24)과 결합되고, 상기 볼스크류 너트(21)의 일측단에 설치되어 그 공기분사노즐(24)의 공압이 상기 볼스크류 너트(21)의 내부와 축(20)으로 향하는 공기로(22)가 형성된 냉각 브래킷(23)을 구성하여 된 것이다.On the other hand, the air injection nozzle 24 at one end of the ball screw nut 21 to inject air supplied to the friction portion that is generated by the contact movement of the ball screw nut 21 with respect to the ball screw shaft 20 Is coupled to one side of the ball screw nut 21 and the air path 22 of the air injection nozzle 24 is directed toward the shaft 20 and the inside of the ball screw nut 21. It is to constitute the formed cooling bracket (23).
상기와 같이 구성된 본 고안의 작동상태를 설명하면 다음과 같다.Referring to the operating state of the subject innovation configured as described above are as follows.
상기 윤활유 탱크(10)로부터의 오일이 펌핑수단(16)에 의해 유입관로(12)를 통해 유입되면 유량조절밸브(13)에서 유속조절에 따른 유량을 제어하며 분기된 유입관로(12)내로 흐르면서 볼스크류 축(20)을 회동지지하는 베어링(11)내로 유입된다.When the oil from the lubricating oil tank 10 flows through the inflow pipe 12 by the pumping means 16, the flow control valve 13 controls the flow rate according to the flow rate control and flows into the branched inflow pipe 12. It flows into the bearing 11 which rotationally supports the ball screw shaft 20.
유입된 윤활유는 예압이 걸려 있는 베어링(11)을 윤활 및 냉각하게 되고 다시 배유관로(14)를 통해 상기 윤활유 탱크(10)로 재유입된다. 이는 순환의 1 사이클이며 연속반복된다.The introduced lubricating oil lubricates and cools the bearing 11 under preload and is re-introduced into the lubricating oil tank 10 through the oil duct 14. This is one cycle of the cycle and is repeated continuously.
한편, 이와는 별도로 볼스크류 축(20)에 가동결합된 볼 스크류 너트(21)는 결합된 각 부분이 가동됨에 따라 상당한 열이 발생하는데, 냉각 브래킷(23)에 연결된 공기분사노즐(24)의 공압이 그 브래킷(23)의 공기로(22)를 따라 상기 볼스크류 너트(21)의 내부와 볼스크류 축(20)으로 분사시켜 냉각시키게 된다.On the other hand, the ball screw nut 21, which is movablely coupled to the ball screw shaft 20 separately, generates considerable heat as each of the coupled parts is operated, and the pneumatic pressure of the air spray nozzle 24 connected to the cooling bracket 23 is generated. Along the air passage 22 of the bracket 23 is injected into the ball screw nut 21 and the ball screw shaft 20 to cool.
이상에서와 같은 본 고안은 그리스와 같은 정체된 윤활유가 아니라 순환되면서 베어링을 윤활 및 냉각시키도록 하는 구조이기 때문에 예압이 걸려 있는 베어링으로 충분한 강성을 유지시키도록 하는 한편 볼스크류 및 볼스크류 너트가 가동되면서 마찰되는 부분을 공기의 분사로 냉각하게 되는 구조가 추가로 구성되어 있기 때문에 발열에 따른 볼스크류 축의 변형을 방지하게 되어 볼스크류 너트의 완전한 위치결정을 기대할 수 있는 매우 유용한 효과가 발생된다.Since the present invention is not a static lubricant such as grease, it is a structure that lubricates and cools the bearing while being circulated, thereby maintaining sufficient rigidity with a pre-loaded bearing while moving the ball screw and the ball screw nut. As the structure is further configured to cool the friction part by the injection of air, the ball screw shaft is prevented from being deformed due to heat generation, thereby generating a very useful effect of expecting the complete positioning of the ball screw nut.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019970024860U KR200162550Y1 (en) | 1997-08-30 | 1997-08-30 | Ball screw with lubrication and cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019970024860U KR200162550Y1 (en) | 1997-08-30 | 1997-08-30 | Ball screw with lubrication and cooling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19990011504U KR19990011504U (en) | 1999-03-25 |
| KR200162550Y1 true KR200162550Y1 (en) | 1999-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019970024860U KR200162550Y1 (en) | 1997-08-30 | 1997-08-30 | Ball screw with lubrication and cooling device |
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| Country | Link |
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| KR (1) | KR200162550Y1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR200469881Y1 (en) * | 2012-01-30 | 2013-11-11 | 히윈 테크놀러지스 코포레이션 | Positioning structure for fixing a return member of a ball screw |
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1997
- 1997-08-30 KR KR2019970024860U patent/KR200162550Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
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| KR19990011504U (en) | 1999-03-25 |
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