KR20020015733A - Reduction apparatus for 2nd unbalance force and moment - Google Patents

Reduction apparatus for 2nd unbalance force and moment Download PDF

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Publication number
KR20020015733A
KR20020015733A KR1020000048791A KR20000048791A KR20020015733A KR 20020015733 A KR20020015733 A KR 20020015733A KR 1020000048791 A KR1020000048791 A KR 1020000048791A KR 20000048791 A KR20000048791 A KR 20000048791A KR 20020015733 A KR20020015733 A KR 20020015733A
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KR
South Korea
Prior art keywords
crankshaft
mass moment
shaft
balance
crank
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Application number
KR1020000048791A
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Korean (ko)
Inventor
변언섭
Original Assignee
이계안
현대자동차주식회사
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Priority to KR1020000048791A priority Critical patent/KR20020015733A/en
Publication of KR20020015733A publication Critical patent/KR20020015733A/en

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Classifications

    • 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
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
    • F16C3/06—Crankshafts
    • 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
    • F16F15/26—Compensation of inertia forces of crankshaft systems using solid masses, other than the ordinary pistons, moving with the system, i.e. masses connected through a kinematic mechanism or gear system
    • F16F15/264—Rotating balancer shafts
    • 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
    • F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
    • F16C9/02—Crankshaft bearings
    • F16C9/03—Arrangements for adjusting play

Abstract

PURPOSE: A device for reducing a secondary reciprocation mass moment of a crank shaft is provided to rotate a balance shaft to be engaged with a crank shaft via a rotation gear for reducing the secondary reciprocation mass moment generated by the rotation of the crank shaft by the balance shaft. CONSTITUTION: A device for reducing a secondary reciprocation mass moment of a crank shaft includes a driving gear(11) formed in the middle of a crank shaft(10), a driven gear(21) formed in a cylinder block to be engaged with the driving gear for rotating in association and having a diameter less than the driving gear by half, and a balance shaft(20) for axially supporting the driven gear and supported to the cylinder block by bearings(31).

Description

크랭크축의 2차 왕복질량모멘트 감쇄장치{Reduction apparatus for 2nd unbalance force and moment}Reduction apparatus for 2nd unbalance force and moment}

본 발명은 크랭크축의 2차 왕복질량모멘트 감쇄장치에 관한 것으로, 보다 상세하게는 크랭크축이 회전하면서 발생되는 2차 왕복질량 모멘트와 힘의 크기는 같지만 힘의 방향이 반대로 작용하는 밸런스축을 크랭크축과 기어에 의해 맞물려 회전하도록 형성하므로서 크랭크축이 회전하면서 발생하는 2차 왕복질량모멘트를 밸런스축에 의해 감쇄되도록 하는 크랭크축의 2차 왕복질량모멘트 감쇄장치에 관한 것이다.The present invention relates to a second reciprocating mass moment damping device of a crankshaft. More specifically, a second reciprocating mass moment generated while the crankshaft rotates and a balance shaft having the same magnitude but the opposite direction of the force act as a crankshaft. A secondary reciprocating mass moment attenuation device of a crankshaft is formed so as to be engaged with a gear and rotate so that the secondary reciprocating mass moment generated while the crankshaft rotates is attenuated by the balance shaft.

크랭크축은 엔진의 크랭크 케이스 안에 설치된 메인베어링으로 지지되어 있고, 각 실린더의 동력 행정에서 발생한 피스톤의 직선운동을 커넥팅로드를 통해 회전운동으로 바꾸고, 반대로 다른 행정에서는 피스톤에 운동을 가해 연속하여 동력을 발생하는 장치이다.The crankshaft is supported by the main bearing installed in the crankcase of the engine, and converts the linear movement of the piston generated in the power stroke of each cylinder into the rotational movement through the connecting rod, while the other stroke generates the power continuously by applying the movement to the piston. Device.

크랭크축은 일반적으로 도 5와 같이 크랭크핀(12), 크랭크아암(13), 크랭크저널(14) 등이 일체로 되어 있고, 회전의 밸런스를 유지하기 위해 크랭크아암(13)에 밸런스웨이트(15)가 부착되어 있다. 밸런스웨이트(15)는 크랭크축(10)이 회전하면서 발생하는 회전질량모멘트 및 1차 왕복질량모멘트를 감쇠하기 위한 것이다.The crankshaft is generally integrated with the crank pin 12, the crank arm 13, the crank journal 14, etc. as shown in Figure 5, the balance weight 15 to the crank arm 13 to maintain the balance of rotation Is attached. The balance weight 15 is for damping the rotational mass moment and the primary reciprocating mass moment generated while the crankshaft 10 rotates.

크랭크축이 회전하게 되면 크랭크저널의 중심과 크랭크핀의 중심이 편심되어 있기 때문에 균형을 유지하지 못한 상태로 회전하게 되며, 이때 아래식에서와 같은회전질량모멘트 및 왕복질량모멘트가 발생하게 된다.When the crankshaft rotates, the center of the crank journal and the center of the crankpin are eccentric, so they are rotated out of balance. At this time, the rotational mass moment and the reciprocating mass moment are generated as shown in the following equation.

여기서here

P : 실린더 센터 간의 거리P: distance between cylinder centers

R : 크랭크축 센터에서 크랭크핀 센터까지의 거리R: Distance from crankshaft center to crankpin center

L : 커넥팅로드의 길이L: length of connecting rod

Mrecip :왕복질량 (피스톤질량 + 커넥팅로드 질량 ×1/3)M recip: Reciprocating mass (piston mass + connecting rod mass x 1/3)

M : 회전질량 (크랭크핀 질량 + 커넥팅로드 질량 ×2/3)M: Rotational Mass (Crankpin Mass + Connecting Rod Mass × 2/3)

λ: l/R (커넥팅로드의 길이 / 크랭크암의 길이)λ: l / R (length of connecting rod / length of crank arm)

를 지시하는 것이다.To indicate.

그런데 크랭크축이 회전하면서 발생하는 회전질량모멘트 및 1차 왕복질량모멘트는 밸런스웨이트에 의해 감쇄되지만, 2차 성분의 왕복질량모멘트가 잔존하여 엔진을 가진하게 되므로서 차체가 진동하게 되고, 차량의 실내에까지 엔진소음이 전달되는 문제점이 있었다.However, the rotation mass moment and primary reciprocating mass moment generated while the crankshaft rotates are attenuated by the balance weight, but the vehicle body vibrates as the reciprocating mass moment of the secondary components remains and causes the engine to vibrate. There was a problem that the engine noise is transmitted to.

따라서 본 발명은 상기와 같은 문제점을 해결하기 위해 안출된 것으로서, 보다 상세하게는 크랭크축이 회전하면서 발생되는 2차 왕복질량모멘트와 힘의 크기는같지만 힘의 방향이 반대로 작용하는 배런스축을 크랭크축과 회전기어에 의해 맞물려 회전하도록 형성하므로서 크랭크축이 회전하면서 발생하는 2차 왕복질량모멘트가 밸런스축에 의해 감쇄되도록 하는 크랭크축의 2차 왕복질량모멘트 감쇄장치를 제공하는 데 목적이 있다.Therefore, the present invention has been made to solve the above problems, and more specifically, the second reciprocating mass moment generated while the crankshaft rotates and the same magnitude of the force but the direction of the force acting in the opposite direction of the crankshaft It is an object of the present invention to provide a second reciprocating mass moment damping device of a crankshaft in which the second reciprocating mass moment generated while the crankshaft rotates is attenuated by the balance shaft by being formed to engage and rotate by the rotary gear.

본 발명은 상기와 같은 목적을 달성하기 위한 수단으로서,The present invention as a means for achieving the above object,

크랭크핀, 크랭크아암, 크랭크저널, 밸런스웨이트로 구성되어 피스톤의 상하운동을 회전운동으로 변환하는 크랭크축에 있어서,In the crankshaft which consists of a crank pin, a crank arm, a crank journal, and a balance weight, which converts the vertical movement of the piston into a rotary movement,

상기한 크랭크축의 도중에 형성되는 구동기어와;A drive gear formed in the middle of the crankshaft;

상기한 구동기어와 맞물려 회전하도록 실린더블럭 내부에 형성되며, 상기 구동기어의 1/2 직경으로 구성되는 종동기어와;A driven gear formed inside the cylinder block to rotate in engagement with the drive gear, the driven gear configured to have a diameter of 1/2 of the drive gear;

상기한 종동기어를 축지하며 그 도중은 베어링에 의해 실린더블럭에 지지되는 밸런스축; 으로 구성되어 상기한 크랭크축의 회전에 의해 발생하는 2차 왕복질량모멘트 성분을 감쇄하도록 하는 것을 특징으로 하며,A balance shaft which supports the driven gear, the middle of which is supported on the cylinder block by a bearing; It is characterized in that to attenuate the second reciprocating mass moment component generated by the rotation of the crankshaft,

상기한 밸런스축의 양측 구간은 단면형상이 서로 대칭되는 반원축으로 구성되는 것을 특징으로 한다.Both sections of the balance axis is characterized in that the cross-sectional shape is composed of a semi-circular axis symmetrical with each other.

도 1은 본 발명에 의해 크랭크축에 구성되는 밸런스축의 장착상태도.1 is a mounting state of the balance shaft constituted in the crankshaft according to the present invention.

도 2는 도 1의 A-A선 단면도.2 is a cross-sectional view taken along the line A-A of FIG.

도 3은 B-B선 단면도.3 is a cross-sectional view taken along line B-B.

도 4는 C-C선 단면도.4 is a cross-sectional view taken along line C-C.

도 5는 종래의 크랭크축을 도시한 도면.5 shows a conventional crankshaft.

※ 도면의 주요부분에 대한 부호의 설명※ Explanation of code for main part of drawing

10 : 크랭크축 11 : 구동기어10: crankshaft 11: drive gear

12 : 크랭크핀 13 : 크랭크암12: crank pin 13: crank arm

14 : 크랭크저널 15 : 밸런스 웨이트14: Crank Journal 15: Balance Weight

20 : 밸런스축 21 : 종동기어20: balance shaft 21: driven gear

22 : 반원축 23 : 원축22: semi-circle axis 23: circular axis

24 : 반원축 30 : 베어링하우징24: semi-circle shaft 30: bearing housing

31 : 베어링31: Bearing

본 발명의 실시예를 첨부한 도면에 따라 상세히 설명하면 다음과 같다.An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 의해 크랭크축에 구성되는 배런스축의 장착상태도이고, 도 2는 도 1의 A-A선 단면도이며,도 3은 B-B선 단면도이고, 도 4는 C-C선 단면도로서, 도면부호 10은 크랭크축이며 도면부호 20은 크랭크축에 맞물려 회전하는 밸런스축이다.Fig. 1 is a mounting state diagram of a balance shaft constituted in a crankshaft according to the present invention, Fig. 2 is a cross-sectional view taken along the line AA of Fig. 1, Fig. 3 is a cross-sectional view taken along the line BB, Fig. 4 is a cross-sectional view taken along the line CC. The shaft 20 is a balance shaft that rotates in engagement with the crank shaft.

크랭크축(10)을 구성하는 크랭크핀(12), 크랭크아암(13), 크랭크저널(14), 밸런스웨이트(15)의 일반적인 구조는 종래와 같다.The general structure of the crank pin 12, the crank arm 13, the crank journal 14, and the balance weight 15 constituting the crank shaft 10 is the same as before.

상기한 크랭크축(10)의 일측으로 밸런스축(20)을 구동하기 위한 별도로 구동기어(11)를 형성하는데, 상기한 구동기어(11)와 맞물려 밸런스축(20)을 회전시키는 종동기어(21)는 구동기어(11)보다 2배속 빠르게 회전할 수 있도록 종동기어(21)의 직경이 구동기어(11)의 1/2 크기로 구성된다.The drive gear 11 is formed separately to drive the balance shaft 20 to one side of the crank shaft 10. The driven gear 21 meshes with the drive gear 11 to rotate the balance shaft 20. ) Has a diameter of the driven gear 21 is 1/2 the size of the drive gear 11 so as to rotate 2 times faster than the drive gear 11.

상기한 종동기어(21)를 축지하는 밸런스축(20)은 실린더블럭 내에 일체로 형성된 베어링하우징(30)에 지지되도록 형성된다.The balance shaft 20 for bearing the driven gear 21 is formed to be supported by a bearing housing 30 integrally formed in the cylinder block.

특히, 상기한 밸런스축(20)은 도 1에서와 같이 #1구간, #2구간, #3구간으로 구분되는데, #1구간과 #3구간은 그 단면이 도 2와 도4에서와 같이 반원이며, 반원축(22,24)은 서로 대칭으로 형성되어 힘의 평형을 유지하도록 되어 있다. #2구간은 베어링(31)에 의해 밸런스축(20)이 지지되는 구간으로 원축(23)으로 구성된다.In particular, the balance shaft 20 is divided into sections # 1, # 2, and # 3 as shown in FIG. 1, and sections # 1 and # 3 have semicircular cross sections as shown in FIGS. The semi-circular shafts 22 and 24 are formed symmetrically with each other to maintain the balance of forces. Section # 2 is a section in which the balance shaft 20 is supported by the bearing 31 and is composed of a circular shaft 23.

이상과 같이 구성되는 크랭크축의 2차 왕복질량모멘트 감쇄장치의 작용을 설명하면 다음과 같다.The operation of the second reciprocating mass moment damping device of the crankshaft configured as described above is as follows.

엔진이 시동되어 크랭크축(10)이 회전하게 되면 축이 좌우 및 상하로 흔들리면서 크랭크축(10)에는 회전질량모멘트 및 1차 왕복질량모멘트와 2차 왕복질량모멘트가 아래의 식과 같이 생성된다.When the engine is started and the crankshaft 10 rotates, the shaft shakes left and right and up and down, and the crankshaft 10 generates a rotational mass moment, a first reciprocating mass moment, and a second reciprocating mass moment as in the following equation.

여기서here

P : 실린더 센터 간의 거리P: distance between cylinder centers

R : 크랭크축 센터에서 크랭크핀 센터까지의 거리R: Distance from crankshaft center to crankpin center

L : 커넥팅로드의 길이L: length of connecting rod

Mrecip :왕복질량 (피스톤질량 + 커넥팅로드 질량 ×1/3)M recip: Reciprocating mass (piston mass + connecting rod mass x 1/3)

M : 회전질량 (크랭크핀 질량 + 커넥팅로드 질량 ×2/3)M: Rotational Mass (Crankpin Mass + Connecting Rod Mass × 2/3)

λ: l/R (커넥팅로드의 길이 / 크랭크암의 길이)λ: l / R (length of connecting rod / length of crank arm)

를 나타낸다.Indicates.

그리고, 크랭크축(10)과 기어(11,21)에 의해 맞물려 회전하는 밸런스축(21)에는 아래의 식과 같은 회전모멘트가 생성된다.Then, a rotation moment is generated on the balance shaft 21 meshed with the crank shaft 10 and the gears 11 and 21 to rotate.

즉, 크랭크축(10)이 회전하면서 발생하는 회전질량모멘트 및 1차왕복질량모멘트는 크랭크축(10)과 일체로 회전하는 밸런스웨이트(15)에 의해 상쇄되고, 2차 왕복질량모멘트는 밸런스축(20)이 회전하면서 발생되는 모멘트에 의해 감쇄되는 것이다.That is, the rotational mass moment and the primary reciprocating mass moment generated while the crankshaft 10 rotates are offset by the balance weight 15 which rotates integrally with the crankshaft 10, and the secondary reciprocating mass moment is the balance shaft. It is attenuated by the moment generated while the (20) rotates.

따라서 상기한 같이 구성되는 본 발명은 밸런스축이 크랭크축에 맞물려 함께회전하게 되어 크랭크축에서 발생되는 2차 왕복질량모멘트와 크기는 같고 방향이 반대인 회전모멘트가 생성되므로서 진동과 소음의 원인이 되는 크랭크축의 2차왕복질량모멘트 성분을 상쇄시키는 효과가 있는 것이다.Therefore, the present invention, which is configured as described above, rotates together with the balance shaft engaged with the crank shaft, thereby generating a rotation moment having the same size and opposite direction as the second reciprocating mass moment generated from the crank shaft, thereby causing vibration and noise. This has the effect of canceling the second reciprocating mass moment component of the crankshaft.

Claims (2)

크랭크핀, 크랭크아암, 크랭크저널, 밸런스 웨이트로 구성되어 피스톤의 상하운동을 회전운동으로 변환하는 크랭크축에 있어서,In the crankshaft which consists of a crank pin, a crank arm, a crank journal, and a balance weight, which converts the up and down movement of the piston into a rotational movement, 크랭크축(10)의 도중에 형성되는 구동기어(11)와;A drive gear 11 formed in the middle of the crankshaft 10; 상기한 구동기어(11)와 맞물려 회전하도록 실린더블럭 내부에 형성되며, 상기 구동기어의 1/2 직경으로 구성되는 종동기어(21)와;A driven gear 21 formed inside the cylinder block to rotate in engagement with the drive gear 11 and configured to have a diameter of 1/2 of the drive gear; 상기한 종동기어(21)를 축지하며 그 도중은 베어링(31)에 의해 실린더블럭의 베어링하우징(30)에 지지되는 밸런스축(20); 으로 구성되어 상기한 크랭크축(10)의 회전에 의해 발생하는 2차 왕복질량모멘트 성분을 감쇄하도록 하는 것을 특징으로 하는 크랭크축의 2차 왕복질량모멘트 감쇄장치.A balance shaft 20 supported by the bearing housing 30 of the cylinder block by the bearing 31; The second reciprocating mass moment damping device of the crankshaft, characterized in that for reducing the secondary reciprocating mass moment component generated by the rotation of the crankshaft (10). 제 1 항에 있어서,The method of claim 1, 상기한 밸런스축(20)의 양측구간은 단면형상이 서로 대칭되는 반원축(22,24)으로 구성되며, 베어링을 지지하는 중간구간은 원축(23)으로 구성되는 것을 특징으로 하는 크랭크축의 2차 왕복질량모멘트 감쇄장치.The two side sections of the balance shaft 20 are composed of semi-circular shafts 22 and 24 whose cross-sectional shapes are symmetrical with each other, and the intermediate section supporting the bearing is composed of a circular shaft 23. Reciprocating mass moment damping device.
KR1020000048791A 2000-08-23 2000-08-23 Reduction apparatus for 2nd unbalance force and moment KR20020015733A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04357346A (en) * 1991-05-31 1992-12-10 Kubota Corp Balancer device of engine
JPH05231479A (en) * 1992-02-20 1993-09-07 Honda Motor Co Ltd Balancer for engine
JPH10238595A (en) * 1996-12-27 1998-09-08 Toyota Motor Corp Engine balancer device
JP2000027948A (en) * 1998-07-15 2000-01-25 Suzuki Motor Corp Balancer device of outboard motor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04357346A (en) * 1991-05-31 1992-12-10 Kubota Corp Balancer device of engine
JPH05231479A (en) * 1992-02-20 1993-09-07 Honda Motor Co Ltd Balancer for engine
JPH10238595A (en) * 1996-12-27 1998-09-08 Toyota Motor Corp Engine balancer device
JP2000027948A (en) * 1998-07-15 2000-01-25 Suzuki Motor Corp Balancer device of outboard motor

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