KR19990035137A - Camshaft bearing structure of engine - Google Patents

Camshaft bearing structure of engine Download PDF

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Publication number
KR19990035137A
KR19990035137A KR1019970056874A KR19970056874A KR19990035137A KR 19990035137 A KR19990035137 A KR 19990035137A KR 1019970056874 A KR1019970056874 A KR 1019970056874A KR 19970056874 A KR19970056874 A KR 19970056874A KR 19990035137 A KR19990035137 A KR 19990035137A
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KR
South Korea
Prior art keywords
bearing
camshaft
cylinder head
cam shaft
journal
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KR1019970056874A
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Korean (ko)
Inventor
이창열
Original Assignee
양재신
대우자동차 주식회사
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Priority to KR1019970056874A priority Critical patent/KR19990035137A/en
Publication of KR19990035137A publication Critical patent/KR19990035137A/en

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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
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
    • F16C17/028—Sliding-contact bearings for exclusively rotary movement for radial load only with fixed wedges to generate hydrodynamic pressure, e.g. multi-lobe 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/06—Drive shafts

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

본 발명은 차량 엔진의 캠샤프트 구동장치에 있어서, 캠샤프트 저널베어링 지지구조에 관한 것으로, 특히 저널베어링에 걸리는 체결력을 일정하게 유지하게 함으로써 캠샤프트와 베어링의 간극에 스며있는 유막형성을 일정하게 유지하고, 구동진동을 저감시킬 수 있도록 한 엔진의 캠 샤프트 저널베어링 구조에 관한 것으로, 실린더헤드(10)의 상부에 횡설되는 캠샤프트(30)를 회전지지하기 위해 저면에 원주방향으로 베어링 저널부(21)를 갖는 캠샤프트 베어링(20)을 실린더헤드볼트(40)의 체결력에 의해 실린더헤드(10)에 설치함에 있어서, 상기 캠샤프트(30)와 상기 캠샤프트 베어링(20)의 베어링 저널부(21)와의 유막 간극을 일정하게 형성하기 위해 상기 캠샤프트 베어링(20)의 저면에 베어링 저널부(21)와 실린더헤드볼트(40)의 사이에 위치되는 그루브(22)를 형성한 것을 특징으로 한다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camshaft journal bearing support structure in a camshaft driving apparatus for a vehicle engine, and in particular, to maintain a constant clamping force applied to the journal bearing to maintain a constant oil film formation in the gap between the camshaft and the bearing. The present invention relates to a cam shaft journal bearing structure of an engine capable of reducing driving vibration, and includes a bearing journal portion circumferentially on a bottom surface for rotationally supporting a cam shaft 30 rolled over an upper portion of a cylinder head 10. In the camshaft bearing 20 having the camshaft bearing 20 mounted on the cylinder head 10 by the fastening force of the cylinder head bolt 40, the bearing journal portion of the camshaft 30 and the camshaft bearing 20 ( The groove 22 positioned between the bearing journal portion 21 and the cylinder head bolt 40 is formed on the bottom surface of the camshaft bearing 20 so as to uniformly form an oil film gap therewith. Characterized in that formed.

Description

엔진의 캠 샤프트 베어링 구조Camshaft bearing structure of engine

본 발명은 차량 엔진의 캠샤프트 구동장치에 있어서, 캠샤프트 저널베어링 지지구조에 관한 것으로, 특히 저널베어링에 걸리는 체결력을 일정하게 유지하게 함으로써 캠샤프트와 베어링의 간극에 스며있는 유막형성을 일정하게 유지하고, 구동진동을 저감시킬 수 있도록 한 엔진의 캠 샤프트 저널베어링 구조에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camshaft journal bearing support structure in a camshaft driving apparatus for a vehicle engine, and in particular, to maintain a constant clamping force applied to the journal bearing to maintain a constant oil film formation in the gap between the camshaft and the bearing. The present invention relates to a cam shaft journal bearing structure of an engine capable of reducing driving vibrations.

일반적으로 엔진의 밸브를 작동시키기 위해 사용되는 캠 샤프트는 크랭크축의 풀리에 연결된 타이밍벨트를 통하여 회전력을 전달받고, 실린더헤드의 상부에서 회전하여 흡,배기 밸브를 작동시키는 부품이다.In general, the cam shaft used to operate the valve of the engine is a component that receives the rotational force through the timing belt connected to the pulley of the crankshaft, and rotates in the upper portion of the cylinder head to operate the intake and exhaust valves.

상기 캠 샤프트를 실린더헤드에 회전지지되게 설치하기 위해서 종래는 도 1에 도시된 바와 같이 실린더헤드(10)의 상부에 일정간격에 원주상으로 반원형의 베어링 저널부(11)를 형성하고, 이 베어링 저널부(11)에 캠샤프트(30)를 올려놓고, 상기 베어링 저널부(11)의 상면에 원주상으로 반원형의 베어링 저널부(21)를 갖는 캠샤프트 베어링(20)을 양측에 체결수단인 각각의 실린더헤드볼트(40)를 사용하여 고정 설치함으로써 캠샤프트(30)를 회전지지하게 되어 있다.In order to install the cam shaft rotatably supported on the cylinder head, as shown in FIG. 1, a semicircular bearing journal 11 is formed on the cylinder head 10 at a predetermined interval circumferentially as shown in FIG. The camshaft 30 is placed on the journal portion 11, and the camshaft bearing 20 having a semicircular bearing journal portion 21 circumferentially on the upper surface of the bearing journal portion 11 is fastening means. The cam shaft 30 is rotatably supported by being fixed by using each cylinder head bolt 40.

그리고 캠샤프트(30)와 캠샤프트베어링(20)의 사이에는 실린더헤드(10)내의 오일갤러리를 통하여 압송된 오일이 스며들어, 캠샤프트(30)의 구동시 윤활을 하고, 캠샤프트(30)와 캠샤프트베어링(20)의 접동저항을 저감시키게 되어 있다.Then, the oil pushed through the oil gallery in the cylinder head 10 is infiltrated between the cam shaft 30 and the cam shaft bearing 20 to lubricate the cam shaft 30 when the cam shaft 30 is driven, and the cam shaft 30 And the sliding resistance of the cam shaft bearing 20 are reduced.

그런데 상기와 같이 캠샤프트베어링(20)을 실린더헤드볼트(40)로 체결시킬 경우 캠샤프트베어링(20)은 양측단에서 체결력을 받기 때문에 캠샤프트 베어링(20)의 중앙부분에 최대 굽힘력이 발생되게 된다.However, when the cam shaft bearing 20 is fastened to the cylinder head bolt 40 as described above, the cam shaft bearing 20 receives the clamping force at both ends thereof, so that the maximum bending force is generated at the center of the cam shaft bearing 20. Will be.

따라서 캠샤프트(30)의 외주면과 캠샤프트 베어링(20)의 내주면과의 사이에 형성된 유막이 변형하여 유막간극이 변화게 되고, 이로 인해 캠샤프트(30)의 진동 증가를 초래하게 된다.Therefore, the oil film formed between the outer circumferential surface of the cam shaft 30 and the inner circumferential surface of the cam shaft bearing 20 is deformed to change the oil film gap, thereby causing an increase in vibration of the cam shaft 30.

본 발명은 상기와 같은 사정을 감안하여 안출된 것으로, 실린더헤드볼트의 체결력에 의한 캠샤프트 베어링의 굽힘을 없애 윤활간극을 일정하게 유지하여 캠샤프트의 구동진동을 저감시킬 수 있도록 한 엔진의 캠 샤프트 베어링 구조를 제공함에 그 목적이 있다.The present invention has been made in view of the above circumstances, and the camshaft of the engine can reduce the driving vibration of the camshaft by maintaining the lubrication gap by eliminating the bending of the camshaft bearing due to the clamping force of the cylinder head bolt. The purpose is to provide a bearing structure.

상기의 목적을 달성하기 위한 본 발명의 구체적인 수단은, 실린더헤드의 상부에 횡설되는 캠샤프트를 회전지지하기 위해 저면에 원주방향으로 베어링 저널부를 갖는 캠샤프트 베어링을 실린더헤드볼트의 체결력에 의해 실린더헤드에 설치함에 있어서, 상기 캠샤프트와 상기 캠샤프트 베어링의 베어링 저널부와의 유막 간극을 일정하게 형성하기 위해 상기 캠샤프트 베어링의 저면에 베어링 저널부와 실린더헤드볼트의 사이에 위치되는 그루브를 형성한 것을 특징으로 한다.Specific means of the present invention for achieving the above object, the cam shaft bearing having a bearing journal in the circumferential direction at the bottom to support the cam shaft that is rolled up on the cylinder head by the fastening force of the cylinder head bolt In the present invention, grooves are disposed between the bearing journal portion and the cylinder head bolt on the bottom surface of the camshaft bearing in order to form a constant oil film gap between the camshaft and the bearing journal portion of the camshaft bearing. It is characterized by.

도 1은 종래 캠 샤프트와 캠샤프트베어링의 설치상태도.1 is an installation state of a conventional cam shaft and cam shaft bearing.

도 2는 본 발명의 실시예에 따른 캠 샤프트와 캠샤프트베어링의 설치상태도 및 요부 확대 단면도.Figure 2 is an enlarged cross-sectional view showing the installation state of the cam shaft and the cam shaft bearing in accordance with an embodiment of the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for main parts of the drawings>

10 : 실린더헤드 20 : 캠샤프트 베어링10: cylinder head 20: camshaft bearing

21 : 베어링 저널부 22 : 그루브21: bearing journal 22: groove

30 : 캠샤프트 40 : 실린더헤드볼트30: camshaft 40: cylinder head bolt

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명의 실시예에 따른 캠 샤프트와 캠샤프트베어링의 조립단면도 및 요부 확대 단면도이다.Figure 2 is an assembled cross-sectional view and main portion enlarged cross-sectional view of the cam shaft and the cam shaft bearing in accordance with an embodiment of the present invention.

도 2에 도시된 바와 같이 실린더헤드(10)의 상부에 횡설되는 캠샤프트(30)를 회전지지하기 위해 저면에 원주방향으로 베어링 저널부(21)를 갖는 캠샤프트 베어링(20)을 실린더헤드볼트(40)의 체결력에 의해 실린더헤드(10)에 설치함에 있어서, 상기 캠샤프트(30)와 상기 캠샤프트 베어링(20)의 베어링 저널부(21)와의 유막 간극을 일정하게 형성하기 위해 상기 캠샤프트 베어링(20)의 저면에 베어링 저널부(21)와 실린더헤드볼트(40)의 사이에 위치되는 그루브(22)를 형성한 구성이다.As shown in FIG. 2, a cam shaft bearing 20 having a bearing journal portion 21 in the circumferential direction at the bottom thereof to support the cam shaft 30 rolled over the upper portion of the cylinder head 10 is provided with a cylinder head bolt. In the cylinder head 10 by the fastening force of the 40, the cam shaft in order to form a constant oil film gap between the cam shaft 30 and the bearing journal portion 21 of the cam shaft bearing 20 The groove | channel 22 located between the bearing journal part 21 and the cylinder head bolt 40 is formed in the bottom face of the bearing 20. As shown in FIG.

이때 상기 그루브(22)의 폭(T)과 높이(H)는 실린더헤드볼트(40)의 체결력에 대해 그루브(22)의 주위가 취약해지지 않는 범위내에서 설정함이 바람직하다.At this time, the width (T) and the height (H) of the groove 22 is preferably set within the range that the periphery of the groove 22 is not weak with respect to the clamping force of the cylinder head bolt (40).

즉, 상기 그루브(22)는 단면이 직사각형의 홈으로 형성된 것으로, 실린더헤드볼트(40)의 체결력으로 발생된 수직력이 직접 캡샤프트 베어링(20)의 베어링 저널부(21)로 전달되는 것을 방지하게 되어 있다.That is, the groove 22 is formed in a groove having a rectangular cross section to prevent the vertical force generated by the fastening force of the cylinder head bolt 40 from being directly transmitted to the bearing journal portion 21 of the cap shaft bearing 20. It is.

이와 같이 구성된 본 실시예의 작용을 설명한다.The operation of this embodiment configured as described above will be described.

먼저, 실린더헤드(10)의 상부에 일정간격에 원주상으로 반원형의 베어링 저널부(11)에 캠샤프트(30)를 올려놓고, 상기 베어링 저널부(11)의 상면에 원주상으로 반원형의 베어링 저널부(21)를 갖는 캠샤프트 베어링(20)을 양측에 체결수단인 각각의 실린더헤드볼트(40)로 체결하게 되면, 실린더헤드볼트(40)의 체결력은 캠샤프트 베어링(20)의 그루브(22)에 차단되어 직접적으로 캠샤프트(20)의 베어링저널부(21)에 미치지 못하게 된다.First, the cam shaft 30 is placed on the semicircular bearing journal 11 in a circumferential shape at a predetermined interval on the upper portion of the cylinder head 10, and the semicircular bearing is circumferentially on the upper surface of the bearing journal 11. When the camshaft bearing 20 having the journal portion 21 is fastened to the respective cylinder head bolts 40 as fastening means on both sides, the fastening force of the cylinder head bolts 40 is the groove of the cam shaft bearing 20. It is blocked by 22) and directly falls to the bearing journal portion 21 of the camshaft 20.

즉, 캠샤프트 베어링(20)으로 전달되는 실린더헤드볼트(40)의 일부 체결력은 그루브(22)의 둘레로 집중되어 결국, 베어링 저널부(21)의 원주방향으로 발생되는 굽힘력을 줄일 수 있는 것이다.That is, a part of the fastening force of the cylinder head bolt 40 transmitted to the camshaft bearing 20 is concentrated around the groove 22, and thus, the bending force generated in the circumferential direction of the bearing journal portion 21 can be reduced. will be.

따라서 캠샤프트(20)의 구동시 캠샤프트(30)와 캠샤프트베어링(20) 베어링 저널부(21)의 사이에 형성되는 유막의 간극은 일정하게 유지되고, 캠샤프트(20)의 진동저감을 얻을 수 있다.Therefore, the gap between the oil film formed between the camshaft 30 and the camshaft bearing 20 bearing journal 21 when the camshaft 20 is driven is kept constant, and the vibration of the camshaft 20 is reduced. You can get it.

상술한 바와 같이 본 발명에 의하면 엔진의 캠샤프트를 회전지지하기 위해 실린더헤드에 설치되는 캠샤프트 베어링의 양단 저면에 실린더헤드볼트의 체결력 영향을 받지 않고 일정한 유막간극을 형성할 수 있도록 함으로써 캠샤프트의 진동저감 효과가 있다.As described above, according to the present invention, it is possible to form a constant oil film gap on the bottom of both ends of the cam shaft bearing installed on the cylinder head to support the cam shaft of the engine without being affected by the fastening force of the cylinder head bolt. It has a vibration reduction effect.

Claims (1)

실린더헤드(10)의 상부에 횡설되는 캠샤프트(30)를 회전지지하기 위해 저면에 원주방향으로 베어링 저널부(21)를 갖는 캠샤프트 베어링(20)을 실린더헤드볼트(40)의 체결력에 의해 실린더헤드(10)에 설치함에 있어서, 상기 캠샤프트(30)와 상기 캠샤프트 베어링(20)의 베어링 저널부(21)와의 유막 간극을 일정하게 형성하기 위해 상기 캠샤프트 베어링(20)의 저면에 베어링 저널부(21)와 실린더헤드볼트(40)의 사이에 위치되는 그루브(22)를 형성한 것을 특징으로 하는 엔진의 캠 샤프트 베어링 구조.The camshaft bearing 20 having the bearing journal 21 in the circumferential direction on the bottom thereof is supported by the fastening force of the cylinder head bolt 40 to rotationally support the camshaft 30 rolled on the upper portion of the cylinder head 10. In the cylinder head 10, the camshaft bearing 20 is formed on the bottom surface of the camshaft bearing 20 in order to form a constant oil film gap between the camshaft 30 and the bearing journal 21 of the camshaft bearing 20. Cam shaft bearing structure of the engine, characterized in that the groove 22 is formed between the bearing journal portion 21 and the cylinder head bolt (40).
KR1019970056874A 1997-10-31 1997-10-31 Camshaft bearing structure of engine KR19990035137A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019970056874A KR19990035137A (en) 1997-10-31 1997-10-31 Camshaft bearing structure of engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019970056874A KR19990035137A (en) 1997-10-31 1997-10-31 Camshaft bearing structure of engine

Publications (1)

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KR19990035137A true KR19990035137A (en) 1999-05-15

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KR1019970056874A KR19990035137A (en) 1997-10-31 1997-10-31 Camshaft bearing structure of engine

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009008670A2 (en) * 2007-07-09 2009-01-15 Namdo Mold Co., Ltd. Heddle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009008670A2 (en) * 2007-07-09 2009-01-15 Namdo Mold Co., Ltd. Heddle
WO2009008670A3 (en) * 2007-07-09 2009-03-19 Namdo Mold Co Ltd Heddle

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