KR100207986B1 - Rolling vibration preventing system for bearing - Google Patents
Rolling vibration preventing system for bearing Download PDFInfo
- Publication number
- KR100207986B1 KR100207986B1 KR1019960065432A KR19960065432A KR100207986B1 KR 100207986 B1 KR100207986 B1 KR 100207986B1 KR 1019960065432 A KR1019960065432 A KR 1019960065432A KR 19960065432 A KR19960065432 A KR 19960065432A KR 100207986 B1 KR100207986 B1 KR 100207986B1
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- KR
- South Korea
- Prior art keywords
- outer ring
- shaft
- support member
- ball bearing
- shaft support
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
- F16C33/586—Details of specific parts of races outside the space between the races, e.g. end faces or bore of inner ring
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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
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
-
- 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
-
- 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
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
- F16C27/04—Ball or roller bearings, e.g. with resilient rolling bodies
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
-
- 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
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
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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
- F16C19/54—Systems consisting of a plurality of bearings with rolling friction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/067—Fixing them in a housing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
본 발명은 초고속으로 회전하는 볼 베어링에서 발생한 구름 진동이 축에 전달되어 축에 압입되어 있는 회전체에 전달되는 것을 방지한 볼 베어링의 구름 진동 방지 장치에 관한 것이다.The present invention relates to an apparatus for preventing rolling vibration of a ball bearing which prevents rolling vibration generated in a ball bearing rotating at a high speed from being transmitted to a shaft and transmitted to a rotating body pressed into the shaft.
본 발명에 의하면 회전체의 회전 중심에 결합되어 있는 소정 직경의 축과, 상기 축에 내륜이 압입 고정되어 있고 상기 내륜보다 큰 직경을 갖는 외륜 사이에 강구가 형성되어 있는 볼 베어링과, 상기 볼 베어링의 외륜을 고정 지지하는 축 지지부재를 구비하고 있는 베어링 장치에 있어서, 상기 축 지지부재는 상기 외륜과 소정 간극이 형성되도록 상기 외륜의 직경보다 다소 큰 직경을 갖고, 상기 외륜과 상기 축 지지부재 사이의 상기 간극에는 상기 볼 베어링에서 발생하는 구름 진동을 감쇄하는 진동 감쇄수단이 형성되어 있으며, 상기 외륜과 상기 축 지지부재에 회전 슬립이 발생하는 것을 방지하는 외륜-축 지지부재 슬립 방지 수단이 형성되어 있는 것을 특징으로 한다.According to the present invention, a ball bearing in which steel balls are formed between a shaft having a predetermined diameter coupled to a rotational center of the rotating body, an inner ring is press-fitted to the shaft, and an outer ring having a diameter larger than the inner ring, and the ball bearing. A bearing device having a shaft support member for fixing and supporting the outer ring of the shaft, wherein the shaft support member has a diameter slightly larger than the diameter of the outer ring so that a predetermined gap is formed between the outer ring and the outer ring and the shaft support member. Vibration damping means for attenuating the rolling vibration generated in the ball bearing is formed in the gap of the outer ring and the shaft support member slip preventing means for preventing the rotational slip is generated in the outer ring and the shaft support member is formed It is characterized by being.
Description
본 발명은 볼 베어링의 구름진동 방지 장치에 관한 것으로, 더욱 상세하게는 초고속으로 회전하는 볼 베어링에서 발생한 구름 진동이 축에 전달되어 축에 압입되어 있는 회전체에 전달되는 것을 방지한 볼 베어링의 구름진동 방지 장치에 관한 것이다.The present invention relates to an apparatus for preventing rolling vibration of a ball bearing, and more particularly, to a rolling bearing of a ball bearing which prevents the rolling vibration generated from a ball bearing rotating at a high speed from being transmitted to a shaft and transmitted to a rotating body pressed into the shaft. It relates to a vibration preventing device.
널리 공지된 바와 같이, 비데오 테이프 레코더의 헤드 구동장치, 레이져 프린터의 폴리건 미러 구동장치인 스캐너 모터, 캠코더 구동 모터 등은 점차 고밀도화, 소형화가 진행되고 있으며, 이와 같은 구동장치들이 안정되며 초고속으로 회전하기 위해서는 회전 마찰 손실을 최소로 하는 베어링이 필수적인 바, 이와 같은 베어링으로는 크게 구름 베어링과 미끄럼 운동을 하는 미끄럼 베어링이 다수 개발되어 있다.As is well known, the head drive device of a video tape recorder, the scanner motor which is a polygon mirror drive device of a laser printer, the camcorder drive motor, etc. are gradually increasing in size and miniaturization, and these drive devices are stable and rotate at high speed. In order to minimize the rotational friction loss, a bearing is essential, and as such a bearing, a large number of sliding bearings having a rolling bearing and sliding motion have been developed.
이중 구름 베어링으로는 외륜과 내륜 사이에 강구를 압입하여 형성한 볼 베어링이 대표적으로 상기 각종 기기에 사용되고 있다.As double rolling bearings, ball bearings formed by press-fitting steel balls between an outer ring and an inner ring are typically used in the above-mentioned various devices.
도 1은 이와 같은 볼 베어링이 적용된 VTR용 헤드 구동 장치의 일부를 단면도로 도시한 도면으로, VTR용 헤드 구동 장치는 크게 보아 고정되어 있는 하부 드럼(10), 소정 회전수로 회전하는 축(20)에 압입되어 있는 상부 드럼(30) 및 상부 드럼(30)을 회전시키는 구동 장치(40)(45)로 크게 구성되어 있다.FIG. 1 is a cross-sectional view of a part of a head drive device for a VTR to which such a ball bearing is applied. The head drive device for a VTR includes a lower drum 10 which is largely fixed and a shaft 20 that rotates at a predetermined rotational speed. It consists largely of the drive apparatus 40 (45) which rotates the upper drum 30 and the upper drum 30 press-fitted into ().
상기 VTR용 헤드 구동 장치의 하부 드럼(10)은 데크 플레이트(미도시)에 안착되어 있는 별도의 드럼 베이스(미도시)에 고정 스크류 등에 의해 다시 고정되어 있으며, 하부 드럼(10)의 중앙부는 소정 직경, 소정 높이로 돌출된 부싱부(15)가 형성되어 있다.The lower drum 10 of the head drive unit for the VTR is fixed again to a separate drum base (not shown) seated on a deck plate (not shown) by a fixing screw or the like, and a central portion of the lower drum 10 is predetermined. A bushing portion 15 protruding at a diameter and a predetermined height is formed.
또한, 도 2에 도시된 바와 같이, 축(20)에는 내륜(50d)이 압입 형성되어 있으며, 상기 부싱부(15)에는 외륜(50a)이 압입되어 상기 축(20)을 지지 및 마찰 손실을 최소로 해주는 강구(50f)로 이루어진 볼 베어링(50)이 상기 부싱부(15)의 상하 양단 소정 위치에 한 쌍으로 압입 설치되어 있다.In addition, as shown in FIG. 2, the inner ring 50d is press-fitted to the shaft 20, and the outer ring 50a is press-fitted to the bushing part 15 to support the shaft 20 and reduce friction loss. A ball bearing 50 made of a steel ball 50f to be minimized is press-fitted in pairs at predetermined positions at both upper and lower ends of the bushing part 15.
상기 구동 장치(40)(45)는 하부 드럼(10)의 외측 밑면에 설치되어 있는 스테이터(45) 및 축(20)의 일측단과 결합되어 있으며 스테이터(45)와 소정 간격 이격되어 로터(40)로 형성되어 있는 것이다.The driving device 40, 45 is coupled to one side end of the stator 45 and the shaft 20 installed on the outer bottom surface of the lower drum 10, and is spaced apart from the stator 45 by a predetermined distance from the rotor 40. It is formed as.
한편, 하부 드럼(10)의 부싱부(15)에 설치되어 있는 한 쌍의 볼 베어링(50)에 끼워져 있는 축(20)의 타측단으로는 상부 드럼(30)이 끼워지는데 이때 상부 드럼(30)에 형성되어 있는 세미 드럼부(semi drum;35)는 상기 하부 드럼(10)의 부싱부(15)의 외주면을 통해 끼워져 있다.On the other hand, the upper drum 30 is inserted into the other end of the shaft 20 fitted to the pair of ball bearings 50 installed on the bushing portion 15 of the lower drum 10, the upper drum 30 The semi-drum part 35 formed at the bottom face) is fitted through the outer circumferential surface of the bushing part 15 of the lower drum 10.
상기 세미 드럼부(35)에는 영상 신호 및 음성 신호를 판독하는 헤드 팁(head tip;60)이 고정되어 있는 회전 원판(65)이 안착되도록 헤드 안착부(70)가 형성되어 있다.In the semi-drum portion 35, a head seating portion 70 is formed so that the rotating disc 65 on which the head tip 60 for reading the video signal and the audio signal is fixed is seated.
도면 미설명 부호 80은 프린트 기판이며, 90은 실드 케이스, 100은 상호 수 ㎛ 이격되어 형성되어 있는 로터리 회전 트랜스이다.Reference numeral 80 is a printed circuit board, 90 is a shield case, and 100 is a rotary rotary transformer formed by several micrometers from each other.
이와 같이 구성되어 있는 종래의 볼 베어링이 적용된 VTR용 헤드 구동 장치의 작용을 첨부된 도면을 참조하여 설명하면 다음과 같다.Referring to the accompanying drawings, the operation of the head drive device for a VTR to which a conventional ball bearing is constructed as described above is as follows.
먼저, 스테이터(45)와 로터(40)에 전원이 인가되어 로터(40)가 소정 방향으로 회전하기 시작하면 로터(40)에 압착되어 있는 축(20)이 회전하게 되는데, 이때 축을 지지 및 축을 지지하는 부분에서 발생하는 마찰 손실을 최소로 하기 위해 하부 드럼(10)의 부싱부(15)에 압입되어 있는 볼 베어링(50)에 의해 축(20)은 최소의 마찰력으로 회전하게 된다.First, when power is applied to the stator 45 and the rotor 40 and the rotor 40 starts to rotate in a predetermined direction, the shaft 20 compressed to the rotor 40 is rotated. The shaft 20 is rotated with the minimum frictional force by the ball bearing 50 press-fitted into the bushing portion 15 of the lower drum 10 in order to minimize the frictional loss occurring in the supporting portion.
이어서, 축(20)의 회전에 의해 축(20)에 압입되어 있는 상부 드럼(10) 또한 축(20)과 동일 회전 방향, 동일 회전 속도로 회전하게 되는데 상부 드럼(30)의 회전에 따라서, 상부 드럼(30)의 헤드 팁(60) 또한 고속으로 회전하면서 VTR용 자기기록 매체에 기록되어 있는 영상 신호 및 음성 신호를 판독하게 된다.Subsequently, the upper drum 10 press-fitted to the shaft 20 by the rotation of the shaft 20 also rotates in the same rotational direction and at the same rotational speed as the shaft 20. According to the rotation of the upper drum 30, The head tip 60 of the upper drum 30 also rotates at high speed and reads out video and audio signals recorded on the VTR magnetic recording medium.
그러나, 이와 같이 축 및 부싱부에 압입되어 있는 볼 베어링은 축이 고속 회전함에 따라서 볼 베어링의 외륜 및 내륜과 접촉하고 있는 강구 사이의 마찰력에 의해 강구 또한 회전 방향으로 구름이 발생하고 강구의 구름에 따라 구름 진동이 발생하여, 발생한 구름 진동이 축 및 축에 압입되어 있는 회전체에 전달되어 회전체의 고속 회전시 회전 성능을 저하하는 문제점이 있었다.However, as the shaft is rotated at high speed, the ball bearing pressed into the shaft and the bushing part has a rolling force in the direction of rotation of the steel ball and the rolling direction due to the friction force between the outer and inner steel balls of the ball bearing. Accordingly, rolling vibrations are generated, and thus, rolling vibrations are transmitted to a rotating body that is press-fitted to the shaft and the shaft, thereby degrading rotation performance of the rotating body at high speed.
따라서, 본 발명은 이와 같은 종래의 문제점을 감안하여 안출된 것으로써, 본 발명의 목적은 볼 베어링의 내륜을 축에 압입하고 외륜을 부싱부에 압입하지 않고 삽입하되, 부싱부와 외륜사이에 수 ㎛의 간극이 형성되도록 하고 부싱부와 외륜 사이의 간극에 소정 유체를 채워넣고, 볼 베어링의 외륜이 회전하는 것을 방지하는 외륜 회전 방지 수단을 구비하여 볼 베어링의 구름 진동이 상기 부싱부와 외륜 사이에 유입되어 있는 유체에 의해 흡수되어 구름 진동을 상쇄시키는 볼 베어링 구름 진동 댐핑 장치를 제공함에 있다.Accordingly, the present invention has been made in view of such a conventional problem, and an object of the present invention is to press the inner ring of the ball bearing into the shaft and insert the outer ring without pressing the bushing into the bushing portion, but between the bushing portion and the outer ring. Rolling vibration of the ball bearing is provided between the bushing portion and the outer ring, provided with an outer ring rotation preventing means for forming a gap of μm, filling a predetermined fluid into the gap between the bushing portion and the outer ring, and preventing the outer ring of the ball bearing from rotating. To provide a ball bearing rolling vibration damping device that is absorbed by the fluid flowing in to cancel the rolling vibration.
도 1은 종래의 볼 베어링이 적용된 VTR 헤드 구동 장치의 단면도.1 is a cross-sectional view of a VTR head drive device to which a conventional ball bearing is applied.
도 2는 도 1의 A-A' 단면도.2 is a cross-sectional view taken along line AA ′ of FIG. 1.
도 3은 본 발명에 의한 볼 베어링이 적용된 VTR 헤드 구동 장치의 단면도.3 is a cross-sectional view of the VTR head drive device to which the ball bearing according to the present invention is applied.
도 4는 도 3의 C 부분을 확대한 확대도.4 is an enlarged view illustrating a portion C of FIG. 3 enlarged.
도 5는 도 3의 B-B' 단면도.5 is a cross-sectional view taken along line BB ′ of FIG. 3.
도면의 주요 부분에 대한 부호의 설명Explanation of symbols for the main parts of the drawings
10: 하부 드럼20: 축10: lower drum 20: shaft
30: 상부 드럼40,45: 구동장치30: upper drum 40, 45: drive device
이와 같은 본 발명의 목적을 달성하기 위한 볼 베어링 구름 진동 댐핑 장치는 회전체의 회전 중심에 결합되어 있는 소정 직경의 축과, 상기 축에 내륜이 압입 고정되어 있고 상기 내륜보다 큰 직경을 갖는 외륜 사이에 강구가 형성되어 있는 볼 베어링과, 상기 볼 베어링의 외륜을 고정 지지하는 축 지지부재를 구비하고 있는 베어링 장치에 있어서, 상기 축 지지부재는 상기 외륜과 소정 간극이 형성되도록 상기 외륜의 직경보다 다소 큰 직경을 갖고, 상기 외륜과 상기 축 지지부재 사이의 상기 간극에는 상기 볼 베어링에서 발생하는 구름 진동을 감쇄하는 진동 감쇄수단이 형성되어 있으며, 상기 외륜과 상기 축 지지부재에 회전 슬립이 발생하는 것을 방지하는 외륜-축 지지부재 슬립 방지 수단이 형성되어 있는 것을 특징으로 한다.The ball bearing rolling vibration damping device for achieving the object of the present invention is between the shaft of a predetermined diameter coupled to the rotation center of the rotating body, and the outer ring having an inner ring is press-fit fixed to the shaft and having a diameter larger than the inner ring A bearing device comprising a ball bearing having a steel ball formed therein, and a shaft support member for holding and supporting the outer ring of the ball bearing, wherein the shaft support member is somewhat larger than the diameter of the outer ring so that a predetermined gap is formed with the outer ring. It has a large diameter, the gap between the outer ring and the shaft support member is formed with vibration damping means for attenuating the rolling vibration generated in the ball bearing, the rotational slip occurs in the outer ring and the shaft support member It characterized in that the outer ring-shaft support member slip preventing means for preventing is formed.
이하, 본 발명 볼 베어링 구름 진동 댐핑 장치를 첨부된 도면을 참조하여 설명하면 다음과 같다.Hereinafter, the ball bearing rolling vibration damping device of the present invention will be described with reference to the accompanying drawings.
도 3은 본 발명에 의한 VTR용 헤드 구동 장치를 바람직한 일실시예로 도시한 단면도로써, VTR용 헤드 구동 장치는 크게 보아 고정되어 있는 하부 드럼(10), 소정 회전수로 회전하는 축(20)에 압입되어 있는 상부 드럼(30) 및, 상부 드럼(30)을 회전시키는 구동 장치(40)(45)로 크게 구성되어 있다.3 is a cross-sectional view showing a head drive device for a VTR according to the present invention as a preferred embodiment, the head drive device for a VTR is a lower drum 10 that is largely fixed, the shaft 20 rotates at a predetermined rotation speed It consists of the upper drum 30 press-fitted in and the drive apparatus 40 (45) which rotates the upper drum 30 large.
상기 VTR용 헤드 구동 장치의 하부 드럼(10)은 데크 플레이트(미도시)에 안착되어 있는 별도의 드럼 베이스(미도시)에 고정 스크류 등에 의해 다시 고정되어 있으며, 하부 드럼(10)의 중앙부는 소정 직경, 소정 높이로 돌출된 부싱부(또는 축 지지부재;15)가 형성되어 있다.The lower drum 10 of the head drive unit for the VTR is fixed again to a separate drum base (not shown) seated on a deck plate (not shown) by a fixing screw or the like, and a central portion of the lower drum 10 is predetermined. A bushing portion (or shaft support member 15) protruding at a diameter and a predetermined height is formed.
또한 도 4 및 도 5에 도시된 바와 같이, 상기 댐핑 장치에는 부싱부(15)의 상단 및 하단 내주면에는 축(20)에 압입되어 있는 볼 베어링(50)의 외륜(50a) 직경보다 수 ㎛ 크고, 외륜(50a)의 높이와 대응하여 외륜(50a)이 삽입되도록 볼 베어링 홈(50b)이 형성되어 있으며, 볼 베어링 홈(50b)의 홈 벽면으로부터 일정 간격으로 수 ㎛ 깊이로 소정 면적 함몰된 복수개(2 개 이상)의 요홈(50e)이 형성되어 있다.4 and 5, the damping device is several micrometers larger than the diameter of the outer ring 50a of the ball bearing 50 pressed into the shaft 20 on the upper and lower inner circumferential surfaces of the bushing part 15. A plurality of ball bearing grooves 50b are formed so that the outer ring 50a is inserted in correspondence with the height of the outer ring 50a, and the plurality of recesses are recessed in a predetermined area several micrometers deep at regular intervals from the groove wall surface of the ball bearing groove 50b. (2 or more) grooves 50e are formed.
한편, 축(20)에 내륜(50d)이 압입되어 있는 볼 베어링(50)의 외륜(50a)에는 상기 요홈(50e)의 개수 및 요홈(50e)의 면적에 대응하여 수 ㎛ 돌출된 키(key; 50c)가 형성되어 있어, 상기 베어링의 외륜(50a)에 형성되어 있는 키(50c)와 부싱부(15)에 형성되어 있는 요홈(50e)이 상호 결합하여 볼 베어링의 외륜(50a)은 회전 불가능하게 형성되어 있는 것이다. 즉, 상기 요홈(50e)과 상기 키(50c)에 의해 외륜-축의 회전 슬립을 방지하게 된다.On the other hand, in the outer ring 50a of the ball bearing 50 in which the inner ring 50d is press-fitted to the shaft 20, a key protrudes several micrometers corresponding to the number of the grooves 50e and the area of the grooves 50e. 50c is formed, and the key 50c formed in the outer ring 50a of the bearing and the groove 50e formed in the bushing part 15 are mutually engaged to rotate the outer ring 50a of the ball bearing. It is impossible to form. That is, the groove 50e and the key 50c prevent rotation slip of the outer ring shaft.
이와 같이 부싱부(15)와 볼 베어링(50)의 외륜(50a)사이에 형성되어 있는 수 ㎛의 간극에는 소정 점도를 갖는 작동 유체 즉, 광유 등의 유류로 볼 베어링에서 발생한 진동을 감쇄시키는 역할을 하는 유체가 채워져 있으며, 상기 부싱부(15)의 상하단부에 형성되어 있는 볼 베어링(50)의 외측에는 상기 작동 유체가 부싱부(15)의 외부로 누설되는 것을 방지하기 위해 실링 커버(sealing cover;110)가 도포 되어 있다.In this way, a gap of several micrometers formed between the bushing part 15 and the outer ring 50a of the ball bearing 50 serves to attenuate vibration generated in the ball bearing with a working fluid having a predetermined viscosity, that is, oil such as mineral oil. The fluid is filled, the sealing cover (sealing) to prevent the working fluid from leaking to the outside of the bushing (15) on the outside of the ball bearing 50 formed on the upper and lower ends of the bushing (15) cover; 110 is applied.
또한, 상기 하부 드럼(10)의 외측 밑면에는 스테이터(45)가 설치되어 있고, 상기 스테이터(45)와 소정 간격 이격되어 로터(40)가 축(20)의 일측단과 결합되어 있으며, 축(20)의 타측단으로는 상부 드럼(30)이 끼워지는데 이때 상부 드럼(30)에 형성되어 있는 세미 드럼부(semi drum;35)는 상기 하부 드럼(10)의 부싱부(15)의 외주면을 통해 끼워져 있다.In addition, a stator 45 is installed on an outer bottom surface of the lower drum 10, and the rotor 40 is coupled to one end of the shaft 20 by being spaced apart from the stator 45 by a predetermined interval, and the shaft 20 The upper drum 30 is fitted to the other end of the), wherein the semi drum 35 formed on the upper drum 30 is formed through the outer circumferential surface of the bushing 15 of the lower drum 10. It is fitted.
상기 세미 드럼부(35)에는 영상 신호 및 음성 신호를 판독하는 헤드 팁(head tip;60)이 고정되어 있는 회전 원판(65)이 안착되도록 헤드 안착부(70)가 형성되어 있다. 여기서, 도면 미설명 부호 80은 프린트 기판이며, 90은 실드 케이스, 110은 상호 수 ㎛ 이격되어 형성되어 있는 로터리 회전 트랜스이다.In the semi-drum portion 35, a head seating portion 70 is formed so that the rotating disc 65 on which the head tip 60 for reading the video signal and the audio signal is fixed is seated. Here, reference numeral 80 is a printed circuit board, 90 is a shield case, and 110 is a rotary rotary transformer formed by several micrometers from each other.
이와 같이 구성되어 있는 본 발명 볼 베어링 구름 진동 방지 장치의 작용을 살펴보면 다음과 같다.Looking at the action of the ball bearing rolling vibration preventing device of the present invention configured as described above is as follows.
먼저, 스테이터(45)와 로터(40)에 전원이 인가되어 로터(40)가 소정 방향으로 회전하기 시작하면 로터(40)에 압착되어 있는 축(20)이 회전하게 되는데, 이때 축(20)을 지지 및 축(20)을 지지하는 부분에서 발생하는 마찰 손실을 최소로 하기 위해 하부 드럼(10)의 부싱부(15)에 삽입되어 있는 볼 베어링(50)에 의해 축(20)은 최소의 마찰력으로 회전하게 된다.First, when power is applied to the stator 45 and the rotor 40 and the rotor 40 starts to rotate in a predetermined direction, the shaft 20 compressed to the rotor 40 is rotated. In this case, the shaft 20 Shaft 20 is minimized by a ball bearing 50 inserted into the bushing portion 15 of the lower drum 10 in order to minimize the frictional losses occurring in the portion supporting the shaft 20 and the shaft 20. It is rotated by friction.
이때, 축(20)은 볼 베어링(50)의 내륜(50d)에 압입되어 있으며, 볼 베어링(50)의 외륜(50a)은 부싱부(15)와 소정 크기의 간극을 형성하면서 회전 불가능하게 형성되어 있어 축(20)의 고속 회전에 의해 강구의 구름 운동으로 발생한 구름 진동은 부싱부(15)와 외륜(50a) 사이에 형성되어 있는 유체막에 의해 흡수되어 진동의 크기가 감소하게 된다.At this time, the shaft 20 is press-fitted into the inner ring (50d) of the ball bearing 50, the outer ring (50a) of the ball bearing 50 is formed to be non-rotating while forming a gap of a predetermined size with the bushing portion 15 The rolling vibration generated by the rolling motion of the steel ball by the high-speed rotation of the shaft 20 is absorbed by the fluid film formed between the bushing portion 15 and the outer ring 50a to reduce the magnitude of the vibration.
이어서, 축(20)의 회전에 의해 축(20)에 압입되어 있는 상부 드럼(30) 또한 축(20)과 동일 회전 방향, 동일 회전 속도로 회전하게 되는데 상부 드럼(30)의 회전에 따라서, 상부 드럼(30)의 헤드 팁(60) 또한 고속으로 회전하면서 VTR용 자기기록 매체에 기록되어 있는 영상 신호 및 음성 신호를 판독하게 된다.Subsequently, the upper drum 30 press-fitted to the shaft 20 by the rotation of the shaft 20 also rotates in the same rotational direction and at the same rotational speed as the shaft 20. As the upper drum 30 rotates, The head tip 60 of the upper drum 30 also rotates at high speed and reads out video and audio signals recorded on the VTR magnetic recording medium.
본 발명에서는 VTR용 헤드 구동 장치를 바람직한 일실시예로 설명하였지만, 하드 디스크 드라이버(HDD) 구동 장치, 캡스턴 모터, 플로피 디스크 드라이버 구동 장치 등 볼 베어링이 적용되고 있는 각종 구동 장치에도 청구범위의 정신을 벗어나지 않는 범위에서 용이하게 적용할 수 있을 것이다.In the present invention, the head drive device for a VTR has been described as a preferred embodiment, but the spirit of the claims is applied to various drive devices to which ball bearings are applied, such as a hard disk driver (HDD) drive device, a capstan motor, and a floppy disk driver drive device. It can be easily applied within a range that does not deviate.
이상에서 상세히 설명한 바와 같이, 내륜과 외륜, 내륜과 외륜의 사이에 형성되어 있는 강구를 포함하고 있는 볼 베어링중 외륜과 외륜을 지지하고 있는 지지부재의 사이에 간극을 형성하고 상기 간극 사이에 소정 유체를 채워 볼 베어링의 구름 진동을 상기 소정 유체에 의해 흡수하여 볼 베어링의 구름 진동이 회전체에 전달되지 않도록 하여 회전체의 회전 성능을 안정시키는 효과가 있다.As described in detail above, a gap is formed between the outer ring and the support member supporting the outer ring among ball bearings including steel balls formed between the inner ring and the outer ring, the inner ring and the outer ring, and a predetermined fluid is formed between the gaps. It is effective to stabilize the rotational performance of the rotating body by absorbing the rolling vibration of the ball bearing by the predetermined fluid so that the rolling vibration of the ball bearing is not transmitted to the rotating body.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960065432A KR100207986B1 (en) | 1996-12-13 | 1996-12-13 | Rolling vibration preventing system for bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960065432A KR100207986B1 (en) | 1996-12-13 | 1996-12-13 | Rolling vibration preventing system for bearing |
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| KR19980046996A KR19980046996A (en) | 1998-09-15 |
| KR100207986B1 true KR100207986B1 (en) | 1999-07-15 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2011088004A3 (en) * | 2010-01-15 | 2011-11-17 | Dresser-Rand Company | Bearing assembly support and adjustment system |
| US8283825B2 (en) | 2009-10-09 | 2012-10-09 | Dresser-Rand Company | Auxiliary bearing system with plurality of inertia rings for magnetically supported rotor system |
| US8308364B2 (en) | 2009-10-09 | 2012-11-13 | Dresser-Rand Company | Auxiliary bearing system for magnetically supported rotor system |
| US8408806B2 (en) | 2009-10-09 | 2013-04-02 | Dresser-Rand Company | Auxiliary bearing system with oil ring for magnetically supported rotor system |
| US8465207B2 (en) | 2009-10-09 | 2013-06-18 | Dresser-Rand Company | Auxiliary bearing system with oil reservoir for magnetically supported rotor system |
| KR101341627B1 (en) * | 2007-02-01 | 2013-12-16 | 엘지전자 주식회사 | Bearing assembly and laundry treatment machine including the same |
| US8851756B2 (en) | 2011-06-29 | 2014-10-07 | Dresser-Rand Company | Whirl inhibiting coast-down bearing for magnetic bearing systems |
| US8876389B2 (en) | 2011-05-27 | 2014-11-04 | Dresser-Rand Company | Segmented coast-down bearing for magnetic bearing systems |
| US8994237B2 (en) | 2010-12-30 | 2015-03-31 | Dresser-Rand Company | Method for on-line detection of liquid and potential for the occurrence of resistance to ground faults in active magnetic bearing systems |
| US9024493B2 (en) | 2010-12-30 | 2015-05-05 | Dresser-Rand Company | Method for on-line detection of resistance-to-ground faults in active magnetic bearing systems |
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| KR100793144B1 (en) * | 2007-01-04 | 2008-01-10 | 김덕기 | Installation structure of eccentric shaft for screen apparatus |
| KR101795395B1 (en) | 2016-03-21 | 2017-12-01 | 현대자동차 주식회사 | Bearing unit for drive motor |
| KR102189135B1 (en) * | 2019-03-19 | 2020-12-09 | 두산중공업 주식회사 | Apparatus for supporting rotor |
-
1996
- 1996-12-13 KR KR1019960065432A patent/KR100207986B1/en not_active IP Right Cessation
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101341627B1 (en) * | 2007-02-01 | 2013-12-16 | 엘지전자 주식회사 | Bearing assembly and laundry treatment machine including the same |
| US8283825B2 (en) | 2009-10-09 | 2012-10-09 | Dresser-Rand Company | Auxiliary bearing system with plurality of inertia rings for magnetically supported rotor system |
| US8308364B2 (en) | 2009-10-09 | 2012-11-13 | Dresser-Rand Company | Auxiliary bearing system for magnetically supported rotor system |
| US8408806B2 (en) | 2009-10-09 | 2013-04-02 | Dresser-Rand Company | Auxiliary bearing system with oil ring for magnetically supported rotor system |
| US8465207B2 (en) | 2009-10-09 | 2013-06-18 | Dresser-Rand Company | Auxiliary bearing system with oil reservoir for magnetically supported rotor system |
| WO2011088004A3 (en) * | 2010-01-15 | 2011-11-17 | Dresser-Rand Company | Bearing assembly support and adjustment system |
| US8353633B2 (en) | 2010-01-15 | 2013-01-15 | Dresser-Rand Company | Bearing assembly support and adjustment system |
| US8994237B2 (en) | 2010-12-30 | 2015-03-31 | Dresser-Rand Company | Method for on-line detection of liquid and potential for the occurrence of resistance to ground faults in active magnetic bearing systems |
| US9024493B2 (en) | 2010-12-30 | 2015-05-05 | Dresser-Rand Company | Method for on-line detection of resistance-to-ground faults in active magnetic bearing systems |
| US9551349B2 (en) | 2011-04-08 | 2017-01-24 | Dresser-Rand Company | Circulating dielectric oil cooling system for canned bearings and canned electronics |
| US8876389B2 (en) | 2011-05-27 | 2014-11-04 | Dresser-Rand Company | Segmented coast-down bearing for magnetic bearing systems |
| US8851756B2 (en) | 2011-06-29 | 2014-10-07 | Dresser-Rand Company | Whirl inhibiting coast-down bearing for magnetic bearing systems |
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| Publication number | Publication date |
|---|---|
| KR19980046996A (en) | 1998-09-15 |
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