KR0124484Y1 - Lubricating apparatus of vcr head drum assembly - Google Patents
Lubricating apparatus of vcr head drum assemblyInfo
- Publication number
- KR0124484Y1 KR0124484Y1 KR2019950030838U KR19950030838U KR0124484Y1 KR 0124484 Y1 KR0124484 Y1 KR 0124484Y1 KR 2019950030838 U KR2019950030838 U KR 2019950030838U KR 19950030838 U KR19950030838 U KR 19950030838U KR 0124484 Y1 KR0124484 Y1 KR 0124484Y1
- Authority
- KR
- South Korea
- Prior art keywords
- main shaft
- bearing
- drum
- bearing seat
- drum assembly
- Prior art date
Links
- 230000001050 lubricating effect Effects 0.000 title description 4
- 238000005461 lubrication Methods 0.000 claims abstract description 28
- 239000000956 alloy Substances 0.000 claims abstract description 6
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000000446 fuel Substances 0.000 claims 1
- 238000003756 stirring Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/52—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with simultaneous movement of head and record carrier, e.g. rotation of head
- G11B5/53—Disposition or mounting of heads on rotating support
- G11B5/531—Disposition of more than one recording or reproducing head on support rotating cyclically around an axis
-
- 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
- F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact bearings
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/60—Guiding record carrier
- G11B15/61—Guiding record carrier on drum, e.g. drum containing rotating heads
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/60—Guiding record carrier
- G11B15/66—Threading; Loading; Automatic self-loading
- G11B15/665—Threading; Loading; Automatic self-loading by extracting loop of record carrier from container
- G11B15/6653—Threading; Loading; Automatic self-loading by extracting loop of record carrier from container to pull the record carrier against drum
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
- G11B25/06—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using web-form record carriers, e.g. tape
- G11B25/063—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using web-form record carriers, e.g. tape using tape inside container
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/10—Structure or manufacture of housings or shields for heads
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
- H02K5/1672—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotary shaft at both ends of the rotor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
본 고안은 제조가 용이하고 가격이 저렴하며 오일의 보급없이도 윤활특성을 장기간 양호하게 유지할 수 있는 브이씨알의 헤드드럼 조립체용 윤활장치를 제공한다. 본 고안의 윤활장치는 고정상태로 유지되는 하부드럼(30)과, 이 하부드럼을 관통해서 조립되고, 모터에 의해 회전구동되는 주축(32)과, 이 주축의 상단에 고정되어 주축과 함께 회전운동하며, 영상신호의 기록 및 재생을 위한 비디오헤드를 갖는 상부드럼(34)으로 이루어진 브이씨알의 헤드드럼 조립체에 있어서, 상기 하부드럼과 일체로 형성되는 것으로, 주축이 관통해서 끼워지는 축공(52), 이 축공의 양단에 마련된 원환상의 베어링 시트(54), 그리고 이 베어링 시트를 따라 축방향으로 연장되고 전체길이에 걸쳐 반경방향 내측으로 개방되어 베어링 시트와 통해 있는 적어도 하나의 축방향 리세스(56)를 구비하고 있는 베어링 하우징(50)과, 상기 베어링 하우징의 베어링 시트에 끼워져서 주축을 회전가능하게 지지하며, 소결합금으로 제조되는 다공성 저어널 베어링(58)과, 상기 베어링 하우징의 축방향 리세스에 압입되어 상기 저어널 베어링에 오일을 지속적으로 공급해 주는 급유패드(60)로 구성된다.The present invention provides a lubrication device for a head drum assembly of V-AL which is easy to manufacture, inexpensive, and can maintain good lubrication characteristics for a long time without replenishing oil. The lubrication device of the present invention has a lower drum 30 which is held in a fixed state, a main shaft 32 which is assembled to penetrate the lower drum, and is driven by a motor, and is fixed to an upper end of the main shaft and rotates together with the main shaft In the head drum assembly of V-C, comprising an upper drum (34) having a video head for recording and playing a video signal, the shaft hole (52) is formed integrally with the lower drum and has a main shaft inserted therethrough. ), An annular bearing seat 54 provided at both ends of the axial bore, and at least one axial recess extending axially along the bearing seat and opening radially inward over its entire length, through the bearing seat. A bearing housing 50 having a 56 and a porous stirrer inserted into a bearing seat of the bearing housing to rotatably support the main shaft and made of a small alloy And a lubrication pad 60 press-fitted into the axial recess of the bearing housing to continuously supply oil to the journal bearing.
Description
제1도는 볼베어링을 채용하여 주축의 반경방향 하중 및 축방향 하중을 동시에 지탱하도록 설계된 종래 헤드드럼 조립체의 종단면도이다.FIG. 1 is a longitudinal sectional view of a conventional head drum assembly employing ball bearings designed to simultaneously support radial and axial loads of the main shaft.
제2도는 본 고안에 따른 윤활장치가 적용된 헤드드럼 조립체의 종단면도이다.2 is a longitudinal sectional view of the head drum assembly to which the lubrication device according to the present invention is applied.
제3도는 제2도의 Ⅲ-Ⅲ선 단면도이다.3 is a cross-sectional view taken along the line III-III of FIG.
제4도는 본 고안에 따른 윤활장치의 상세구조를 보여주는 사시도로서, 베어링 하우징의 일부를 절결해서 나타내는 도면이다.Figure 4 is a perspective view showing a detailed structure of the lubrication apparatus according to the present invention, a view showing a part of the bearing housing cut out.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
30 : 하부드럼 32 : 주축30: lower drum 32: spindle
34 : 상부드럼 42 : 전기모터34: upper drum 42: electric motor
48 : 외부캡 50 : 베어링 하우징48: outer cap 50: bearing housing
58 : 저어널 베어링 60 : 급유패드58: journal bearing 60: lubrication pad
본 고안은 브이씨알의 헤드드럼 조립체에 관한 것으로, 더욱 상세하게는 헤드드럼 조립체의 주축에 대하여 윤활을 행하고, 또한 주축의 회전에 따라 하부드럼에 작용하는 하중을 지탱하기 위한 브이씨알의 헤드드럼 조립체용 윤활장치에 관한 것이다.The present invention relates to a head drum assembly of BC-AL, and more particularly to a head drum assembly of BC-AL for lubricating the main shaft of the head drum assembly and supporting a load acting on the lower drum according to the rotation of the main shaft. It relates to a lubrication device for.
공지된 바와 같이, 통상의 브이씨알은 데크 혹은 메인샤시와, 카세트로부터 테이프를 인출하여 소정의 경로를 따라 이동시키도록 테크에 설치되는 주행계와, 이 주행계의 적당개소에 배설되어 이동중인 테이프에 신호를 기록하거나 테이프로부터 신호를 재생하는 헤드드럼 조립체를 갖추고 있다. 이중에서, 헤드드럼 조립체는 신호의 기록 및 재생에 직접 관여하기 때문에 매우 높은 수준의 신뢰성과 안정성을 유지해야 하고, 장기간 반복적으로 사용하더라도 진동이나 소음의 발생이 적어야 한다. 특히, 진동은 크로스토크(cross talk)의 원인이 되어 화질에 결정적인 악영향을 미칠수도 있으므로 이를 엄격히 관리할 필요가 있다.As is known, a typical V-Cal has a deck or main chassis, a traveling system installed in the tech to take out the tape from the cassette and moves it along a predetermined path, and a tape disposed at a suitable place of the traveling system and moving. It is equipped with a head drum assembly for recording signals to and reproducing signals from tape. In particular, the head drum assembly must directly maintain a high level of reliability and stability since it directly participates in recording and reproducing a signal, and should generate little vibration or noise even after repeated use for a long time. In particular, vibration may cause cross talk, which may have a detrimental effect on image quality. Therefore, it is necessary to strictly control the vibration.
이러한 관점에서 종래에는 제1도에 예시하는 것과 같은 헤드드럼 조립체가 개발되어 널리 사용되어 왔다. 이 헤드드럼 조립체는 도면에 도시하지 않은 데크에 고정지지되는 하부드럼(10)과, 이 하부드럼(10)을 관통해서 조립되는 주축(12)과, 이 주축의 상단에 고정되어 주축(12)과 함께 하부드럼(10)에 대하여 회전운동하는 상부드럼(14)과, 상기 주축(12) 및 상부드럼(14)에 회전운동을 유발시키기 위한 전기모터(16)로 구성된다. 그리고, 상기 상부드럼(14)의 저면에는, 예를 들면, 2개의 헤드베이스(18)가 스크류등에 의해서 180° 간격으로 높이조절가능하게 부착되며, 각각의 헤드베이스(18)는 그것의 반경방향 외측단부에 영상신호를 자기적으로 기록하거나 재생하기 위한 비디오헤드(19)를 갖추고 있다. 또한, 상부드럼(14)과 하부드럼(10)사이에는 무접촉방식으로 신호를 전달할 수 있도록 로타리 트랜스포머(20)가 설치되어 있으므로, 비디오헤드로 공급되거나 비디오헤드에서 출력되는 영상신호를 노이즈의 발생없이 주고 받을 수 있게 된다. 한편, 상기 전기모터(16)는 하부드럼(10)에 부착되는 스테이터(22)와 주축(12)에 고정되어 스테이터(22)에 대하여 회전운동하는 로터(24)로 이루어지며, 이 로터(24)는 스테이터(22)로 전류가 공급됨에 따라 주축(12) 및 상부드럼(14)과 함께 고속으로 회전함으로써 비디오헤드(19)로 하여금 테이프의 신호트랙을 차례로 스캔하도록 한다.In view of this, a head drum assembly as illustrated in FIG. 1 has been developed and widely used in the related art. The head drum assembly includes a lower drum 10 fixed to a deck (not shown), a main shaft 12 assembled through the lower drum 10, and a main shaft 12 fixed to an upper end of the main shaft 12. The upper drum 14 rotates with respect to the lower drum 10, and the electric motor 16 for causing a rotational movement to the main shaft 12 and the upper drum 14. Then, on the bottom of the upper drum 14, for example, two head bases 18 are attached so that they are height-adjustable at intervals of 180 DEG by a screw or the like, each head base 18 having its radial direction. A video head 19 for magnetically recording or reproducing a video signal is provided at the outer end. In addition, since the rotary transformer 20 is installed between the upper drum 14 and the lower drum 10 so as to transmit a signal in a contactless manner, an image signal supplied to or output from the video head is generated. You can give and receive without. On the other hand, the electric motor 16 is composed of a stator 22 attached to the lower drum 10 and a rotor 24 fixed to the main shaft 12 to rotate relative to the stator 22, the rotor 24 Rotates at high speed with the main shaft 12 and the upper drum 14 as current is supplied to the stator 22, causing the video head 19 to scan the signal tracks of the tape in turn.
상기한 구성의 헤드드럼 조립체에 있어서 주축(12)은 고속으로 회전하면서 반경방향부하(radial load)와 축방향부하(thrust load)를 발생하게 되는데, 이러한 부하를 지탱하기 위해서 주축(12)과 하부드럼(10)사이에는 한쌍의 볼베어링(26)이 설치된다. 각각의 볼베어링(26)은 내륜(26a)과 외륜(26b)을 갖는 것으로서, 고정링(28)에 의해서 축방향으로 고정되며, 내륜(26a)은 주축(12)과 함께 회전하도록 되어 있는 반면, 외륜(26b)은 하부드럼(10)의 단차부에 안착되어 고정상태로 유지된다. 그런데, 볼베어링(26)은 윤활특성이나 부하지지 능력이 우수하다고 하는 장점이 있는 것이 사실이나, 가격이 비교적 고가일 뿐만 아니라 공차관리가 어렵기 때문에 이를 대체할만한 윤활장치의 출현이 요망되고 있다. 그리하여 최근에는 내주면에 이른바 헤링본 그루브(Herringbone groove)가 형성된 저어널베어링을 사용하여 주축의 윤활을 행하는 저어널 베어링 타입의 윤활장치가 실용화되고 있다. 그러나, 이러한 윤활장치에 의하면, 저어널베어링의 내주면에 헤링본 그루브를 가공하기가 용이하지 않고, 또한, 헤링본 그루브내에 오일을 채워서 사용하는 도중에 오일이 베어링의 밖으로 누출되면 이것을 다시 베어링의 내부로 되돌릴 수가 없기 때문에, 오일의 고갈로 인하여 저어널 베어링의 윤활특성이 점차로 열화된다고 하는 결점이 있다.In the head drum assembly having the above-described configuration, the main shaft 12 rotates at a high speed to generate radial loads and axial loads. A pair of ball bearings 26 are installed between the drums 10. Each ball bearing 26 has an inner ring 26a and an outer ring 26b, which are fixed axially by the fixing ring 28, while the inner ring 26a is adapted to rotate with the main shaft 12, The outer ring 26b is seated on the stepped portion of the lower drum 10 and maintained in a fixed state. By the way, it is true that the ball bearing 26 has the advantage of excellent lubrication characteristics and load bearing ability, but since the price is relatively expensive and the tolerance management is difficult, the appearance of a lubrication device that can replace this is desired. Therefore, in recent years, a journal bearing type lubrication device for lubricating a main shaft using a journal bearing having a so-called herringbone groove formed on its inner circumferential surface has been put to practical use. However, according to such a lubrication device, it is not easy to process the herringbone groove on the inner circumferential surface of the journal bearing, and if oil leaks out of the bearing during filling and using the herringbone groove, it can be returned to the inside of the bearing. As a result, there is a drawback that the lubrication characteristics of journal bearings are gradually degraded due to the exhaustion of oil.
본 고안은 상술한 바와 같은 종래기술의 문제점을 해결하기 위하여 안출된 것으로, 그 목적은 제조가격이 저렴하고, 윤활특성을 장시간 양호하게 유지할 수 있는 브이씨알의 헤드드럼 조립체용 윤활장치를 제공하는 것이다.The present invention has been made to solve the problems of the prior art as described above, the object is to provide a lubrication device for the head drum assembly of V-AL which is low in manufacturing price and can maintain good lubrication characteristics for a long time .
이러한 본 고안의 목적은, 고정상태로 유지되는 하부드럼과, 이 하부드럼을 관통해서 조립되고, 모터에 의해 회전구동되는 주축과, 이 주축의 상단에 고정되어 주축과 함께 회전운동하며, 영상신호의 기록 및 재생을 위한 비디오헤드를 갖는 상부드럼으로 이루어진 브이씨알의 헤드드럼 조립체에 있어서, 상기 하브드럼과 일체로 형성되는 것으로, 주축이 관통해서 끼워지는 축공, 이 축공의 양단에 마련된 원환상의 베어링 시트, 그리고 이 베어링 시트를 따라 축방향으로 연장되고 전체길이에 걸쳐 반경방향내측으로 개방되어 베어링 시트와 통해 있는 적어도 하나의 축방향 리세스를 구비하고 있는 베어링 하우징과, 상기 베어링 하우징의 베어링 시트에 끼워져서 주축을 회전가능하게 지지하며, 소결합금으로 제조되는 다공성 저어널 베어링과, 상기 베어링 하우징의 축방향 리세스에 압입되어 상기 저어널 베어링에 오일을 지속적으로 공급해 주는 급유패드를 포함하는 브이씨알의 헤드드럼 조립체용 윤활장치에 의해서 달성할 수 있다.The object of the present invention is a lower drum which is held in a fixed state, a main shaft assembled through the lower drum, and driven by a motor, and fixed to the upper end of the main shaft to rotate together with the main shaft, the image signal In the head drum assembly of V-Cal consisting of an upper drum having a video head for recording and reproducing, the shaft is formed integrally with the hub drum, and includes a shaft hole through which a main shaft is inserted and an annular shape provided at both ends of the shaft hole. A bearing housing having a bearing seat and at least one axial recess extending axially along the bearing seat and radially inwardly open over its entire length, the bearing seat having a bearing seat therein; A porous journal bearing inserted into and rotatably supporting the main shaft and made of a small alloy; This can be achieved by a lubrication device for the head drum assembly of V-C that includes a lubrication pad press-fitted into the axial recess of the bearing housing to continuously supply oil to the journal bearing.
이하 첨부도면의 제2도내지 제4도를 참조하여 본 고안의 대표적인 실시예를 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 2 to 4 of the accompanying drawings.
제2도에 도시되어 있는 바와 같이, 본 고안의 윤활장치가 적용되는 브이씨알의 헤드드럼 조립체는 도면에 도시하지 않은 데크에 소정의 각도로 경사지게 고정지지되는 하부드럼(30)을 구비하며, 이 하부드럼(30)에는 주축(32)이 관통해서 조립된다. 주축(32)의 상단에는 상부드럼(34)이 고정되어 주축(32)과 함께 하부드럼(30)에 대하여 상대적으로 회전운동하게 된다.As shown in FIG. 2, the head drum assembly of V-Cal to which the lubrication device of the present invention is applied has a lower drum 30 which is fixedly inclined at a predetermined angle to a deck not shown in the drawing. The main shaft 32 penetrates and is assembled to the lower drum 30. The upper drum 34 is fixed to the upper end of the main shaft 32 to rotate relative to the lower drum 30 together with the main shaft 32.
상부드럼(34)의 저면에는, 예를 들면, 2개의 헤드베이스(36)가 스크류(38)에 의해서 180°간격으로 높이조절가능하게 부착되며, 각각의 헤드 베이스(36)는 그것의 반경방향 외측단부에 영상신호를 자기적으로 기록하거나 재생하기 위한 비디오헤드(37)를 구비하고 있다. 또한, 상부드럼(34)과 하부드럼(30)사이에는 무접촉 방식으로 신호를 전달하기 위한 로터리 트랜스포머(40)가 설치되어 있으므로, 비디오헤드(37)로 공급되거나 비디오헤드에서 출력되는 영상신호를 노이즈의 발생없이 주고 받을 수 있게 된다.At the bottom of the upper drum 34, for example, two head bases 36 are attached to the height adjustable by 180 degrees at screw intervals, each head base 36 having its radial direction. A video head 37 for magnetically recording or reproducing a video signal is provided at the outer end. In addition, since the rotary transformer 40 for transmitting a signal in a contactless manner is installed between the upper drum 34 and the lower drum 30, an image signal supplied to or output from the video head 37 is output. It can send and receive without generating noise.
상기 주축(32)과 상부드럼(34)을 하부드럼(30)에 대하여 회전운동시키는 데에는 전기모터(42)가 사용된다. 이 전기모터(42)는 하부드럼(30)에 고정적으로 부착되는 스테이터(44)와, 주축(32)에 고정적으로 설치되며 스테이터(44)를 둘러싸고 있는 로터(46)로 구성된다. 상기 로터(46)는 스테이터(44)로 전류가 공급됨에 따라 주축(32) 및 상부드럼 (34)과 함께 고속으로 회전함으로써 비디오헤드(37)로 하여금 테이프의 신호트랙을 차례로 스캔하도록 한다.An electric motor 42 is used to rotate the main shaft 32 and the upper drum 34 with respect to the lower drum 30. The electric motor 42 is composed of a stator 44 fixedly attached to the lower drum 30, and a rotor 46 fixedly installed on the main shaft 32 and surrounding the stator 44. The rotor 46 rotates at high speed with the main shaft 32 and the upper drum 34 as current is supplied to the stator 44, causing the video head 37 to scan the signal tracks of the tape in turn.
그밖에도 헤드드럼 조립체의 하부에는 외부캡(48)이 씌워지는데 이 외부캡(48)은 주축(32)의 하단을 회전가능하게 지지함으로써 주축(32)의 축방향 하중, 즉, 추력을 지탱하게 된다. 제2도에 도시된 실시예와는 달리, 외부캡(48)을 생략하고, 그 대신에 주축(32)의 적당개소를 축방향으로 받쳐주는 축방향하중 지지구조를 채택하더라도 본 고안의 범위를 벗어나는 것은 아니다.In addition, the lower portion of the head drum assembly is covered with an outer cap 48, which supports the lower end of the main shaft 32 so as to support the axial load, that is, the thrust of the main shaft 32. do. Unlike the embodiment shown in FIG. 2, the outer cap 48 is omitted, and instead the scope of the present invention is adopted even if it adopts an axial load support structure that supports the appropriate portion of the main shaft 32 in the axial direction. It doesn't go away.
상기 하부드럼(30)은 그것과 일체로 형성된 베어링 하우징(50) 혹은 허브를 가지며, 이 베어링 하우징(50)은, 제3도 및 제4도에 가장 명료하게 도시되어 있는 바와 같이, 주축(32)이 관통해서 끼워지는 축공(52), 이 축공(52)의 양단에 마련된 원환상의 베어링 시트(54), 그리고 이 베어링 시트(54)를 따라 축방향으로 연장되고 전체길이에 걸쳐 반경방향 내측으로 개방되어 베어링 시트(54)와 통해 있는 한쌍의 축방향 리세스(56)를 구비한다. 상기 베어링 시트(54)는 베어링 하우징(50)의 단부표면과 내측단차부(54a)사이에 형성되는 것으로, 축공(52)에 비해 약간 큰 직경을 갖는다. 그리고, 상기 축방향 리세스(56)는 베어링 시트(54)의 내주면을 따라 등간격, 즉 180° 간격으로 배열되는 것이 바람직하다. 또한, 축방향 리세스(56)의 갯수 및 배열간격은 도면에 도시된 것에만 한정되는 것은 아니며, 필요에 따라 적절히 변경할 수 있다.The lower drum 30 has a bearing housing 50 or a hub formed integrally therewith, the bearing housing 50 having a main shaft 32, as shown most clearly in FIGS. 3 and 4. ) Is inserted through the shaft hole 52, the annular bearing seat 54 provided at both ends of the shaft hole 52, and extends axially along the bearing seat 54 and radially inward over the entire length. And a pair of axial recesses 56 open through and through the bearing seat 54. The bearing seat 54 is formed between the end surface of the bearing housing 50 and the inner step portion 54a and has a diameter slightly larger than that of the shaft hole 52. In addition, the axial recesses 56 are preferably arranged at equal intervals, that is, at 180 ° intervals, along the inner circumferential surface of the bearing seat 54. In addition, the number and arrangement | sequence spacing of the axial recess 56 are not limited only to what is shown in figure, It can change suitably as needed.
상기 베어링 시트(54)에는 다공성 저어널 베어링(58)이 억지끼워맞춤되어서 주축(32)을 회전가능하게 지지함과 아울러 주축(32)에 대한 윤활을 행하게 된다. 이 저어널 베어링(58)은 동을 주성분으로 하고 소량의 탄소가 첨가된 소결합금으로 제조하며, 원료분말의 입경 및 소결압력을 조절하여 공극율이 15 - 20%, 바람직하게는 18%정도로 되도록 슬리브 형상으로 소결한다. 공극율이 지나치게 크면 저어널 베어링(58)의 부하지지능력(load capacity)이 저하될 뿐만 아니라 내마모성이 불량해지는 반면, 공극율이 지나치게 작으면 저어널 베어링(58)의 오일함유율 및 오일투과율이 떨어져서 윤활특성이 불량해 진다.The porous journal bearing 58 is fitted to the bearing seat 54 so as to rotatably support the spindle 32 and to lubricate the spindle 32. The journal bearing 58 is made of a small-alloy alloy containing copper as a main component and a small amount of carbon added thereto, and adjusting the particle diameter and the sintering pressure of the raw material powder so that the porosity is 15-20%, preferably about 18%. Sinter to shape. If the porosity is too large, not only the load capacity of the journal bearing 58 is lowered, but also the wear resistance is poor, whereas if the porosity is too small, the oil content and oil permeability of the journal bearing 58 are reduced, thereby lubricating characteristics. This becomes bad.
다시 제3도 및 제4도를 보면, 상기 베어링 하우징(50)의 축방향 리세스(56)에는 다량의 오일을 함유하고 있는 급유패드(60)가 압입된다. 이 급유패드(60)는 상기 저어널 베어링(58)에 오일을 지속적으로 공급해 주기 위한 것으로, 오일흡수성이 좋은 연질의 소재, 예를 들면, 면 또는 스폰지등을 봉상으로 성형하여 제조한다. 상기 축방향 리세스(56)에 급유패드(60)을 끼웠을때, 당해 급유패드(60)의 반경방향 내측표면은 저어널 베어링(58)의 외주면에 접촉하게 되고, 따라서 저어널 베어링(58)에는 오일이 지속적으로 공급되어 윤활특성이 악화되는 것을 방지할 수 있다.3 and 4 again, an oil supply pad 60 containing a large amount of oil is press-fitted into the axial recess 56 of the bearing housing 50. The lubrication pad 60 is for continuously supplying oil to the journal bearing 58, and is manufactured by molding a flexible material having good oil absorption, for example, cotton or sponge into a rod. When the lubrication pad 60 is inserted into the axial recess 56, the radially inner surface of the lubrication pad 60 comes into contact with the outer circumferential surface of the journal bearing 58, and thus the journal bearing 58. ), Oil is continuously supplied to prevent deterioration of lubrication characteristics.
이상에서 상세히 설명한 것과 같이, 본 고안의 헤드드럼 조립체용 윤활장치에 의하면, 제조가 용이하고 가격이 저렴한 저어널 베어링을 사용하여 주축의 윤활을 행할 수 있을 뿐만 아니라, 오일의 보급없이도 장시간동안 베어링의 윤활특성을 양호하게 유지할 수 있다고 하는 산업상 유용한 효과를 얻을 수 있다.As described in detail above, according to the lubrication device for the head drum assembly of the present invention, it is possible to lubricate the spindle using a journal bearing which is easy to manufacture and inexpensive, and the bearing of the bearing for a long time without supply of oil. Industrially useful effects of maintaining good lubrication characteristics can be obtained.
Claims (4)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019950030838U KR0124484Y1 (en) | 1995-10-28 | 1995-10-28 | Lubricating apparatus of vcr head drum assembly |
| GB9622188A GB2306583A (en) | 1995-10-28 | 1996-10-25 | Lubricated journal bearing assembly |
| US08/739,019 US5754374A (en) | 1995-10-28 | 1996-10-28 | Dynamic pressure bearing apparatus and head drum assembly of a video cassette recorder utilizing the same |
| JP8300799A JP2875991B2 (en) | 1995-10-28 | 1996-10-28 | Dynamic pressure bearing device and VCR head drum assembly employing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019950030838U KR0124484Y1 (en) | 1995-10-28 | 1995-10-28 | Lubricating apparatus of vcr head drum assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR970019379U KR970019379U (en) | 1997-05-26 |
| KR0124484Y1 true KR0124484Y1 (en) | 1998-10-15 |
Family
ID=19427328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019950030838U KR0124484Y1 (en) | 1995-10-28 | 1995-10-28 | Lubricating apparatus of vcr head drum assembly |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0124484Y1 (en) |
-
1995
- 1995-10-28 KR KR2019950030838U patent/KR0124484Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR970019379U (en) | 1997-05-26 |
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