KR20030039473A - Balance shaft apparatus - Google Patents
Balance shaft apparatus Download PDFInfo
- Publication number
- KR20030039473A KR20030039473A KR1020010070409A KR20010070409A KR20030039473A KR 20030039473 A KR20030039473 A KR 20030039473A KR 1020010070409 A KR1020010070409 A KR 1020010070409A KR 20010070409 A KR20010070409 A KR 20010070409A KR 20030039473 A KR20030039473 A KR 20030039473A
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- KR
- South Korea
- Prior art keywords
- unbalanced mass
- engine
- balance shaft
- variable
- centrifugal force
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/22—Compensation of inertia forces
- F16F15/24—Compensation of inertia forces of crankshaft systems by particular disposition of cranks, pistons, or the like
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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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/1202—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the damping action being at least partially controlled by centrifugal masses
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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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/1204—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon with a kinematic mechanism or gear system
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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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/0011—Balancing, e.g. counterbalancing to produce static balance
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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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2238/00—Type of springs or dampers
- F16F2238/02—Springs
- F16F2238/026—Springs wound- or coil-like
Abstract
Description
본 발명은 엔진의 진동을 감쇄하기 위한 가변적 불평형 질량을 가지는 밸런스 샤프트 장치에 관한 것이다.The present invention relates to a balance shaft device having a variable unbalanced mass for damping vibrations of an engine.
크랭크축은 진동이 없이 원활하게 회전해야 하나 크랭크 저널 중심과 크랭크 핀 중심은 편심되어 있으므로 그대로 회전시키면 밸런스를 유지할 수 없어 심한 진동이 발생된다. 이 때문에 크랭크 핀의 반대쪽의 크랭크 암에 밸런싱 웨이트를 설치하여 회전중에 밸런스를 유지토록 하거나 또는 폭발 행정시 피스톤 운동계에 의해 엔진의 진동이 일어나면 엔진마운팅으로부터 진동이 전달되어 실내 소음이 생기는 현상을 방지코저 엔진의 진동을 감쇄하기 위하여 도 4에 도시하는 것과 같이 크랭크축(20)에 2개의 회전축(21)(22)을 평행하게 장치하고, 스프라켓(23)(24)(25)과 체인(26) 및 기어(28)(28)를 이용하여 일측 회전축(21)과 타측 회전축(22)을 서로 반대 방향으로, 그리고 크랭크축(20)의 2배 속도로 회전축(21)(22)을 구동시키므로써 직렬형 4 실린더 엔진에서 특유하게 발생되는 진동을 저감시키고 있다.The crankshaft should rotate smoothly without vibration, but the center of the crank journal and the crank pin center are eccentric. Therefore, a balancing weight is installed on the crank arm on the opposite side of the crank pin to maintain balance during rotation, or when the engine vibrates due to the piston kinetic system during the explosion stroke, vibration is transmitted from the engine mounting to prevent the occurrence of indoor noise. In order to dampen the vibration of the engine, as shown in FIG. 4, two rotation shafts 21 and 22 are installed in parallel to the crank shaft 20, and the sprockets 23, 24, 25 and the chain 26 And by using the gears 28 and 28 to drive the rotary shafts 21 and 22 in opposite directions to each other and at twice the speed of the crank shaft 20. The vibration generated in a four-cylinder engine in series is reduced.
상기한 회전축(21)(22)은 흔히 밸런스 샤프트 라고 부르고, 그 주변 구성을 포괄하는 의미로 밸런스 샤프트 장치라고 하는바, 밸런스 샤프트 장치(30)는 도 5에 도시하는 것과 같이 크랭크축(20)의 구동력에 의해 기어(28)를 통해 동력을 전달받아 2배속으로 회전하는 회전축(21)(22)과, 그 회전축(21)(22)의 편심되는 질량을 가지도록 일측으로 쏠려 일체로 형성되는 불평형 질량부(21a)(22a)로 형성된 밸런스 샤프트를 구비하고 직렬형 4기통 엔진에서 왕복질량(피스톤중량+콘로드소단부중량)에 해당되는 불평형 질량부를 갖는 2개의 밸런스 샤프트 장치(30)에 의해 피스톤 운동계에 의해 발생하는 불평형력을 상쇄시키도록 되어 있다.The rotating shafts 21 and 22 are commonly referred to as balance shafts, and are referred to as balance shaft apparatuses in a sense encompassing their peripheral configuration, and the balance shaft apparatus 30 has a crank shaft 20 as shown in FIG. 5. It is formed integrally by moving to one side so as to have an eccentric mass of the rotating shaft (21) 22 and the rotating shaft (21) (22) rotated at double speed by receiving power through the gear (28) by the driving force of the Two balance shaft devices 30 having a balance shaft formed of unbalanced mass portions 21a and 22a and having an unbalanced mass portion corresponding to a reciprocating mass (piston weight + conrod small end weight) in a series four-cylinder engine. As a result, an unbalance force generated by the piston kinematic system is canceled out.
그러나 상기한 종래 구조의 밸런스 샤프트 장치에 의하면 엔진의 중.고속 운전 영역에서 불평형력을 상쇄시키므로써 엔진의 2차 진동 및 실내부밍(Booming)소음을 저감시키게 되는 효과가 있으나 엔진의 저속운전, 특히 아이들운전시에는 밸런스 샤프트에 의한 불평형력이 크게 요구되지 않음에도 불구하고 중.고속시와 동일한 구동 조건하에 있어 불필요한 동력 소모를 가져오고 밸런스 샤프트의 불평형 질량이 커서 이에 따른 기어(28) 구동 소음을 유발하는 문제점이 있었다.However, according to the balance shaft device of the conventional structure, the effect of reducing the secondary vibration and the booming noise of the engine by canceling the unbalanced force in the medium and high speed operating range of the engine, Although the unbalance force by the balance shaft is not required during idling operation, it causes unnecessary power consumption under the same driving conditions as at medium and high speeds, and the unbalanced mass of the balance shaft is large, thereby driving the driving noise of the gear 28 accordingly. There was a problem causing.
이에 본 발명은 상기한 점을 감안하여 제안한 것으로서 그의 목적으로 하는 것은 엔진의 아이들 및 저속 운전에서는 밸런스 샤프트의 불평형 량을 최소화하고, 엔진의 중.고속 영역에서는 불평형량을 증가하는 구조로 하여 아이들 및 저속 구동에서 밸런스 샤프트의 구동 소음을 저감할 수 있는 가변적 불평형 질량을 갖는 밸런스 샤프트 장치를 제공하는 데 있다.Accordingly, the present invention has been proposed in view of the above-mentioned point, and its object is to minimize the unbalance amount of the balance shaft in the idle and low speed operation of the engine, and to increase the unbalance amount in the medium and high speed regions of the engine. The present invention provides a balance shaft device having a variable unbalanced mass capable of reducing driving noise of a balance shaft in a low speed drive.
상기한 목적을 달성하기 위하여 본 발명은 크랭크축에 기어 구동기구를 통해 회전하여 엔진의 피스톤 운동계의 밸런스를 유지하게 되는 밸런스 샤프트 장치에 있어서,In order to achieve the above object, the present invention is a balance shaft device that rotates through a gear drive mechanism on the crankshaft to maintain the balance of the piston kinematic system of the engine,
기어구동기구를 통해 전달되는 회전력에 의해 회전하며, 중앙부는 4각 단면축으로 형성되는 회전축과;A rotational shaft rotated by a rotational force transmitted through the gear driving mechanism, and a central portion formed of a quadrilateral cross section axis;
상기 4각단면축에 계합되어 함께 회전하며, 원심력 방향으로 원심력에 비례하여 이동이 허용되어 편심량이 가변되는 불평형 질량부;를 포함하여 구성되어 있다.And an unbalanced mass part that is engaged with the quadrangular cross-section axis and rotates together, and is allowed to move in proportion to the centrifugal force in the centrifugal force direction so that the amount of eccentricity is varied.
도 1은 본 발명에 의한 가변적 불평형 질량을 갖는 밸런스 샤프트 장치를 나타내는 도면1 shows a balance shaft arrangement with a variable unbalanced mass according to the invention.
도 2는 동상 장치의 A-A 단면도2 is a cross-sectional view of the in-phase device A-A
도 3은 동상 장치의 B-B 단면도3 is a sectional view B-B of the in-phase device
도 4는 종래기술4 is a prior art
도 5는 종래기술5 is a prior art
※도면의 주요 부분에 대한 부호의 설명※ Explanation of code for main part of drawing
1 : 밸런스 샤프트 장치 2 : 기어1: balance shaft device 2: gear
3 : 회전축 4 : 불평형 질량부3: rotation axis 4: unbalanced mass part
5 : 볼트 6 : 경계면부5 bolt 6 boundary part
7 : 직사각형 공간 8 : 4각단면축7: rectangular space 8: square section axis
9 : 중심축선 10 : 원형공간9: central axis 10: circular space
11 : 기준면 12 : 리턴스프링11: reference plane 12: return spring
이하 본 발명의 구성을 첨부한 도면을 참조하여 설명한다.Hereinafter, the configuration of the present invention will be described with reference to the accompanying drawings.
도 1은 본 발명에 의한 가변적 불평형 질량을 가지는 밸런스 샤프트 장치를 나타내는 정단면도이며, 도 2는 도 1의 A-A 단면도이고, 도3은 도 1의 B-B 단면도이다.1 is a front sectional view showing a balance shaft device having a variable unbalanced mass according to the present invention, FIG. 2 is a sectional view taken along the line A-A of FIG. 1, and FIG. 3 is a sectional view taken along the line B-B of FIG.
밸런스 샤프트장치(1)는 크랭크축의 회전력을 기어(2)를 통해 전달받아 회전 구동하는 회전축(3)과, 그 회전축(3)에 조립된 불평형 질량부(4)로 구성되어 있다.The balance shaft device 1 is composed of a rotating shaft 3 that receives rotational force of the crankshaft through the gear 2 and drives rotation, and an unbalanced mass portion 4 assembled to the rotating shaft 3.
불평형 질량부(4)는 원통을 2개로 분할하여 제작한 후 볼트(5)로 체결되며, 그 경계면부(6)에는 축방향을 따라 직사각형공간(7)이 형성되어 있으며, 그 직사각형공간(7)에는 상기 회전축(3)의 중앙부분인 4각단면축(8)이 관통하여 장착되어 있다.The unbalanced mass part 4 is manufactured by dividing the cylinder into two, and then fastened by bolts 5, and a rectangular space 7 is formed in the interface 6 along the axial direction, and the rectangular space 7 ), A quadrilateral cross section shaft 8, which is a central portion of the rotary shaft 3, is mounted therethrough.
상기 4각단면축(8)이 일측에 밀착한 상태에서 상기 불평형 질량부(4)는 회전축(3)과 동심을 이루며, 이때 중심축(9)을 넘어 반대쪽으로 형성된 원형공간(10)에는 4각단면축(8)을 중심축선(9)에 위치하는 기준면(11)쪽에 밀착토록 항시 힘을 가하는, 즉 원심력의 작용 방향에 대해 반항하는 방향으로 힘을 가하는 리턴스프링(12)이 수용되어 있다.The unbalanced mass portion 4 is concentric with the rotating shaft 3 in a state in which the quadrilateral cross section shaft 8 is in close contact with one side, and in this case, the circular space 10 formed on the opposite side beyond the central axis 9 is 4. A return spring 12 is provided which always exerts a force on the angular section axis 8 toward the reference plane 11 located on the central axis 9, ie, a force in a direction that is opposed to the direction of action of the centrifugal force. .
그리고 직사각형 단면의 공간(7)의 높이는 회전축(3)의 직경과 동일하거나 조금 크게 설정할 수 있다.The height of the space 7 of the rectangular cross section can be set equal to or slightly larger than the diameter of the rotation shaft 3.
이하에 본 발명의 작용에 대하여 설명한다.The operation of the present invention will be described below.
엔진이 아이들 구동되면, 크랭크축에 연동하여 회전축(3)이 회전하게 되며, 불평형 질량부(4)에는 원심력이 작용하여 리턴스프링(12)을 압축하면서 화살표 방향으로 움직이게 되는 힘이 작용하게 되나, 아이들시의 원심력 보다 리턴스프링(12)의 탄성력이 커서 4각단면부(8)은 직사각형공간(7)의 기준면(11)에 밀착한 상태가 되어 회전하므로써 회전축(3)과 불평형 질량부(4)가 동심을 이루고 있어 불평형력이 작아 기어(2)의 구동소음(Rattle소음)을 줄일 수 있게 된다.When the engine is idle, the rotating shaft 3 rotates in conjunction with the crankshaft, the centrifugal force acts on the unbalanced mass portion 4 and the force moving in the direction of the arrow while compressing the return spring 12 acts. Since the elastic force of the return spring 12 is greater than the centrifugal force at the time of idling, the quadrilateral cross section 8 is brought into close contact with the reference plane 11 of the rectangular space 7 and rotates so that the rotating shaft 3 and the unbalanced mass part 4 are rotated. Since the concentricity is small, it is possible to reduce the driving noise (Rattle noise) of the gear 2 due to the small unbalanced force.
그러나 엔진의 중.고속 운전시에는 불평형 질량부(4)에 작용하는 원심력이 리턴스프링(12)의 탄성력보다 커서 그 회전속도에 비례한 만큼 불평형 질량부(4)가 리턴스프링(12)을 압축하면서 원심력 방향으로 이동하게 되며(점선도시 참조), 불평형 질량부(4)의 외단(4a)이 중심축선(9)으로부터 멀어져 편심량이 증가하므로써 불평형력이 커져 피스톤 운동계의 왕복 질량에 의한 2차 진동을 저감시키게 되는 것이다.However, in the medium and high speed operation of the engine, the centrifugal force acting on the unbalanced mass part 4 is greater than the elastic force of the return spring 12 so that the unbalanced mass part 4 compresses the return spring 12 in proportion to its rotational speed. While moving in the direction of centrifugal force (see dotted line), the outer end 4a of the unbalanced mass portion 4 moves away from the center axis 9, so that the amount of eccentricity increases, thereby increasing the unbalanced force. Will be reduced.
이상과 같은 본 발명은 불평형 질량부가 밸런스 샤프트 장치의 회전축과 별개체로 형성하여 회전시 작용하는 원심력 방향으로 이동할 수 있게 회전축에 끼워 결합시키는 것에 의해서, 엔진의 아이들 구동시에는 불평형 질량부가 회전축과 동심 또는 동심에 가까운 편심량을 가지고 회전하게 되므로써 아이들 구동시 불평형력을 낮추어 기어 구동 소음을 저감하게 되며, 엔진의 중.고속 운전시에는 불평형 질량부가 원심력 방향으로 이동하여 회전축의 중심선과의 편심량이 증가하여 불평형력을 증대시키게 되므로써 고속에서의 왕복 질량에 의한 2차 진동을 효과적으로저감시킬 수 있는 효과가 있다.According to the present invention as described above, the unbalanced mass portion is concentric with the rotation shaft when the engine is idle when the unbalanced mass portion is formed separately from the rotating shaft of the balance shaft device and fitted to the rotating shaft so as to move in the direction of the centrifugal force acting upon rotation. Or by rotating with an eccentricity close to the concentricity, the gear driving noise is reduced by lowering the unbalanced force during idling driving.In the middle and high speed operation of the engine, the unbalanced mass moves in the direction of centrifugal force, increasing the amount of eccentricity with the centerline of the rotating shaft By increasing the unbalance, the secondary vibration caused by the reciprocating mass at high speed can be effectively reduced.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR10-2001-0070409A KR100440023B1 (en) | 2001-11-13 | 2001-11-13 | Balance shaft apparatus |
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Application Number | Priority Date | Filing Date | Title |
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KR10-2001-0070409A KR100440023B1 (en) | 2001-11-13 | 2001-11-13 | Balance shaft apparatus |
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KR20030039473A true KR20030039473A (en) | 2003-05-22 |
KR100440023B1 KR100440023B1 (en) | 2004-07-14 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR10-2001-0070409A KR100440023B1 (en) | 2001-11-13 | 2001-11-13 | Balance shaft apparatus |
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KR (1) | KR100440023B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014001104A1 (en) * | 2012-06-27 | 2014-01-03 | Magna Powertrain Ag & Co Kg | Mass compensation system with variable unbalanced mass |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101412884B1 (en) * | 2008-11-17 | 2014-06-26 | 현대자동차주식회사 | Variable phase type balance shaft |
KR101763202B1 (en) * | 2016-02-23 | 2017-07-31 | 인하대학교 산학협력단 | Washing machine |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100192284B1 (en) * | 1996-12-30 | 1999-06-15 | 정몽규 | Rear suspension |
KR19980074088A (en) * | 1997-03-21 | 1998-11-05 | 김영귀 | Balance weight of car crankshaft |
JP3474732B2 (en) * | 1997-07-30 | 2003-12-08 | 株式会社オティックス | Balance shaft device |
KR100243771B1 (en) * | 1997-11-13 | 2000-03-02 | 정몽규 | Apparatus to eliminate counter unbalance moment of engine |
JP4546604B2 (en) * | 2000-03-24 | 2010-09-15 | ヤマハ発動機株式会社 | Balancer shaft structure of internal combustion engine |
KR100435960B1 (en) * | 2001-09-27 | 2004-06-12 | 현대자동차주식회사 | Balance shaft having magnetic clutch |
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2001
- 2001-11-13 KR KR10-2001-0070409A patent/KR100440023B1/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014001104A1 (en) * | 2012-06-27 | 2014-01-03 | Magna Powertrain Ag & Co Kg | Mass compensation system with variable unbalanced mass |
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KR100440023B1 (en) | 2004-07-14 |
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