KR970005349Y1 - Ball screw device with fix device - Google Patents

Ball screw device with fix device Download PDF

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Publication number
KR970005349Y1
KR970005349Y1 KR2019940013830U KR19940013830U KR970005349Y1 KR 970005349 Y1 KR970005349 Y1 KR 970005349Y1 KR 2019940013830 U KR2019940013830 U KR 2019940013830U KR 19940013830 U KR19940013830 U KR 19940013830U KR 970005349 Y1 KR970005349 Y1 KR 970005349Y1
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KR
South Korea
Prior art keywords
ball screw
screw shaft
bearing
ball
ball bearing
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Application number
KR2019940013830U
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Korean (ko)
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KR960000673U (en
Inventor
이정환
Original Assignee
대우중공업 주식회사
석진철
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Priority to KR2019940013830U priority Critical patent/KR970005349Y1/en
Publication of KR960000673U publication Critical patent/KR960000673U/en
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Publication of KR970005349Y1 publication Critical patent/KR970005349Y1/en

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    • 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
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
    • B23Q1/46—Movable or adjustable work or tool supports using particular mechanisms with screw pairs
    • 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
    • B23Q11/0003—Arrangements for preventing undesired thermal effects on tools or parts of the machine
    • 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
    • B23Q2701/00—Members which are comprised in the general build-up of a form of the machine
    • B23Q2701/01—Frames or slideways for lathes; Frames for boring machines

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

없음none

Description

열변위 방지를 위한 볼스크루축의 고정장치Fixing device for ball screw shaft to prevent thermal displacement

제1도는 종래의 NC선반 볼스크루축 고정장치의 단면도1 is a cross-sectional view of a conventional NC lathe ball screw shaft fixing device

제2도는 본 고안의 NC선반 볼스크루축 고정장치의 단면도2 is a cross-sectional view of the NC lathe ball screw shaft fixing device of the present invention

제3도는 본 고안 요부의 확대 단면도3 is an enlarged cross-sectional view of the main part of the present invention

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

1 : 볼스크루2 : 볼베어링1: Ball screw 2: Ball bearing

3 : 새들몸체1a : 지지단3: saddle body 1a: support end

4 : 베어링캡5 : 조임볼트4: bearing cap 5: tightening bolt

6 : 스페이서7 : 잠금너트6: spacer 7: lock nut

8 : 밀폐형 커버10 : 오일링8: sealed cover 10: oil ring

A : 일측면B : 단턱면A: one side B: step surface

H : 틈새H: clearance

본 고안은 선반이 동력전달용 볼스크루축에 있어서, 여변위 방지를 위한 볼스크루축 고정장치에 관한 것이다.The present invention relates to a ball screw shaft fixing device for the displacement of the shelf in the ball screw shaft for power transmission.

일반적으로 공작기계 등에서 회전운동을 직선운동으로 바꾸는데는 스크루축을 이용하는 경우가 많으며, 이 경우 스크루축은 기계적 마찰에 의해 발생되는 열에 의한 열변형 즉 신축이 일어나게 되며 이러한 변형은 고정밀도를 요하는 공작기계 등에서 정밀도에 심각한 문제가 생기고 긴 스크루축을 사용할 경우 고속회전을 시킬 수 없다. 일반적으로 베어링 양측에 프리텐션을 부여하고 있으나, 제1도에 도시한 바와 같이 볼스크루축(1)에 이물질 및 절삭유 침투를 방지하여 베어링(2)을 보호하는 오일실(10)이 개재되어 오일실(10)과 볼스크루축(1)이 마찰되어 열변위의 주요 원인이 되고 있다.In general, the screw shaft is used to convert the rotational movement into a linear movement in a machine tool, and in this case, the screw shaft causes thermal deformation due to heat generated by mechanical friction, that is, expansion and contraction. Serious problems arise in precision and high speed rotation is not possible with long screw shafts. In general, pretension is applied to both sides of the bearing, but as shown in FIG. 1, the oil seal 10 is provided to protect the bearing 2 by preventing foreign matter and cutting oil from penetrating into the ball screw shaft 1. The seal 10 and the ball screw shaft 1 are in friction and are a major cause of thermal displacement.

도면중 미설명 부호 4는 베어링캡이고, 5는 조임볼트이다.In the figure, reference numeral 4 is a bearing cap, and 5 is a tightening bolt.

본 고안은 상기와 같은 문제점을 감안하여 안출된 것으로, 오일실을 없애고 베어링보호용 밀폐형 커버를 설치하여 볼스크루축(1)과의 마찰을 일으키지 않게 하여 볼스크루축(1)의 열변위를 방지하기 위한 볼스크루축(1)의 고정장치를 제공함에 있다.The present invention was devised in view of the above problems, to eliminate the oil seal and to install a sealed cover for bearing protection so as not to cause friction with the ball screw shaft (1) to prevent thermal displacement of the ball screw shaft (1) To provide a fixing device for the ball screw shaft (1).

상기의 목적을 달성하기 위한 본 고안의 구체적인 수단은, 볼스크루축을 회전 지지하는 볼베어링은 새들몸체에 삽입자재되고 볼베어링의 일측면과 지지단의 단턱면과의 사이에 일정한 간격의 틈새가 유지되고, 상기 볼베어링을 타측면에서 고정 지지하는 베어링캡이 조임볼트에 의해 새들몸체에 체결되고, 상기 베어링캡의 축방향에는 단원통의 스페이서가 끼워 넣어져 볼스크루축을 지지하고, 또 일측의 잠금너트에 의하여 볼베어링을 축선방향으로 누르도록 하고, 상기 볼스크루의 일단을 밀폐형 커버로 고정하고, 이 밀폐형 커버의 내경에 오일링을 개재하여서 된 것을 특징으로 한다.Specific means of the present invention for achieving the above object, the ball bearing for rotationally supporting the ball screw shaft is inserted into the saddle body and a gap of a constant interval is maintained between one side of the ball bearing and the stepped surface of the support end, A bearing cap for fixing and supporting the ball bearing at the other side is fastened to the saddle body by a tightening bolt, and a spacer of a single cylinder is inserted in the axial direction of the bearing cap to support the ball screw shaft, and by a lock nut at one side. The ball bearing is pressed in the axial direction, and one end of the ball screw is fixed with a sealed cover, and the inner diameter of the sealed cover is characterized by interposing an oil ring.

이하 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, described in detail with reference to the accompanying drawings.

제2도에 있어서, 제1도와 동일 또는 동등부분은 같은 부호를 사용한다.In Fig. 2, the same or equivalent parts as those in Fig. 1 have the same reference numerals.

제2도에 도시한 바와 같이 볼스크루축(1)을 회전 지지하는 볼베어링(2)을 새들몸체(3)에 삽입자재되게 하고, 볼베어링(2)의 일측면(A)과 지지단(1a)의 단턱면(B)과의 사이에 일정간격의 틈새(H)가 유지되게 하며, 상기 볼베어링(2)을 타측면에서 고정 지지하는 베어링캡(4)이 조임볼트(5)의 의해 새들몸체(3)에 체결되고, 상기 베어링캡(4)의 축방향에는 단원통형의 스페이서(6)가 끼워 놓어져 지지단(1a)을 감싸고 또 일측의 잠금너트(7)에 의하여 볼베어링(2)을 측선방향으로 누르도록 하고, 볼스크루축(1)의 일단의 고정나사(9)에 밀폐형 커버(8)를 고정하고, 이 밀폐형 커버(8)의 내경에 오일링(10)이 끼워져 있다.As shown in FIG. 2, a ball bearing 2 for rotationally supporting the ball screw shaft 1 is inserted into the saddle body 3, and one side A and the support end 1a of the ball bearing 2 are inserted. The gap (H) of a predetermined interval is maintained between the stepped surface (B) of the bearing cap (4) for supporting the ball bearing (2) fixed on the other side by the tightening bolt (5) saddle body ( 3), a single cylindrical spacer 6 is inserted in the axial direction of the bearing cap 4 to surround the support end 1a, and the ball bearing 2 is sidelined by the lock nut 7 on one side. The sealing cover 8 is fixed to the fixing screw 9 at one end of the ball screw shaft 1, and the oil ring 10 is fitted in the inner diameter of the sealing cover 8.

상기와 같이 구성된 본 고안의 작동상태를 살펴보면, 도시안된 구동원으로부터 동력전달을 받은 볼스크루축(1)은 회전하고, 이 볼스크루축(1)의 일측 지지단(1a)은 볼베어링(2)에 회전 지지된다. 이때 스페이서(6)는 조임볼트(5)의 조임력으로 베어링캡(4)에 의해 축선방향으로 밀어붙여져 베어링(2)의 내륜을 일측으로 누르고 있다.Looking at the operating state of the present invention configured as described above, the ball screw shaft (1) receives the power transmission from the drive source not shown is rotated, one side of the support end (1a) of the ball screw shaft (1) to the ball bearing (2) Rotationally supported. At this time, the spacer 6 is pushed in the axial direction by the bearing cap 4 by the tightening force of the tightening bolt 5 to press the inner ring of the bearing 2 to one side.

이때 볼베어링(2)의 일측면 (A)과 대향되는 볼스크루축(1)의 단턱면(B)과의 사이에 일정간격의 열변위 방지용 틈새(H)가 형성되며, 이후 장시간의 가공물의 가공시간이 경과하여 기계적 마찰력에 의해 발생된 열로 볼스크루축(1)은 축선방향으로 변형되는데, 이때 틈새(H) 만큼의 여유가 있으므로 열변형, 즉 열응력에 따른 변위를 방지할 수 있다.At this time, a gap (H) for preventing heat displacement at a predetermined interval is formed between the one side surface (A) of the ball bearing (2) and the stepped surface (B) of the ball screw shaft (1), and then processing the workpiece for a long time. The ball screw shaft 1 deforms in the axial direction due to the heat generated by the mechanical friction over time. At this time, since the clearance H is sufficient, the ball screw shaft 1 can be prevented from thermal deformation, that is, displacement due to thermal stress.

그리고 상기 볼스크루축(1)의 회전과 함께 밀폐형 커버(8)는 고정나사(9)로 볼스크루축(1)에 고정되어 있으므로 일체로 회전된다. 이에 볼스크루축(1)을 수장하고 있는 내부 절삭유는 밀폐형 커버(8)에 의해 도시한 화살표 방향으로 배출되게 되어 이물질 및 절삭유 침투를 효과적으로 방지하여 준다.And with the rotation of the ball screw shaft (1) is closed cover 8 is fixed to the ball screw shaft (1) with a set screw (9) is rotated integrally. The internal cutting oil carrying the ball screw shaft (1) is discharged in the direction of the arrow shown by the hermetic cover (8) to effectively prevent foreign matter and cutting oil penetration.

오일링(10)은 이물질 등을 차단함으로서 동력전달의 원활함을 꾀하게 된다.The oil ring 10 is intended to smooth the power transmission by blocking foreign substances and the like.

전술한 바와 같이 본 고안은 오일링을 갖는 밀폐형 커버를 볼스크루축에 설치함으로서 이물질 침투방지와 함께 볼스크루축의 마찰열에 의한 열변위를 방지할 수 있는 유용한 고안이다.As described above, the present invention is a useful design capable of preventing foreign material penetration and thermal displacement due to frictional heat of the ball screw shaft by installing a sealed cover having an oil ring on the ball screw shaft.

Claims (1)

볼스크루축(1)을 회전 지지하는 볼베어링(2)을 새들몸체(3)에 삽입 자재되게 하고, 볼베어링(2)의 일측면(A)과 지지단(1a)의 단턱면(B)과의 사이에 일정간격의 열변위 방지용 틈새(H)가 형성하며, 상기 볼베어링(2)을 타측면에서 고정 지지하는 베어링캡(4)이 조임볼트(5)에 의해 새들몸체(3)에 체결되고, 상기 베어링캡(4)의 축방향에는 단원통형의 스페이서(6)가 끼워 넣어져 지지단(1a)을 감싸고, 또 일축의 잠금너트(7)에 의하여 볼베어링(2)을 축선방향으로 누르도록 하고, 상기 볼스크루축(1)의 일단에 밀폐형 커버(8)를 고정하고, 이 밀폐형 커버(8)의 내경에 오일링(10)을 끼워서 된 것을 특징으로 하는 열변위 방지를 위한 볼스크루축의 고정장치A ball bearing 2 for rotationally supporting the ball screw shaft 1 is inserted into the saddle body 3, and one side surface A of the ball bearing 2 and the stepped surface B of the support end 1a are inserted. A gap (H) for preventing thermal displacement at a predetermined interval is formed therebetween, and a bearing cap (4) for fixing and supporting the ball bearing (2) at the other side is fastened to the saddle body (3) by a tightening bolt (5), A single cylindrical spacer 6 is inserted in the axial direction of the bearing cap 4 to surround the support end 1a, and the ball bearing 2 is pushed in the axial direction by the lock nut 7 of one axis. Fixing the ball screw shaft for preventing heat displacement, characterized in that the sealing cover 8 is fixed to one end of the ball screw shaft 1, and the oil ring 10 is inserted into the inner diameter of the sealed cover 8. Device
KR2019940013830U 1994-06-14 1994-06-14 Ball screw device with fix device KR970005349Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019940013830U KR970005349Y1 (en) 1994-06-14 1994-06-14 Ball screw device with fix device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019940013830U KR970005349Y1 (en) 1994-06-14 1994-06-14 Ball screw device with fix device

Publications (2)

Publication Number Publication Date
KR960000673U KR960000673U (en) 1996-01-17
KR970005349Y1 true KR970005349Y1 (en) 1997-06-02

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KR2019940013830U KR970005349Y1 (en) 1994-06-14 1994-06-14 Ball screw device with fix device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106541299A (en) * 2017-01-11 2017-03-29 宁波马可机电有限公司 A kind of hollow oil cooling tail end seat sealing device of machining center screw rod

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