KR20000034661A - Structure of cylinder block and crank shaft bearing with oil passage for vehicle - Google Patents

Structure of cylinder block and crank shaft bearing with oil passage for vehicle Download PDF

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Publication number
KR20000034661A
KR20000034661A KR1019980052045A KR19980052045A KR20000034661A KR 20000034661 A KR20000034661 A KR 20000034661A KR 1019980052045 A KR1019980052045 A KR 1019980052045A KR 19980052045 A KR19980052045 A KR 19980052045A KR 20000034661 A KR20000034661 A KR 20000034661A
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KR
South Korea
Prior art keywords
oil
cylinder block
bearing
crank pin
crankshaft
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KR1019980052045A
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Korean (ko)
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KR100291749B1 (en
Inventor
최영화
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김태구
대우자동차 주식회사
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Priority to KR1019980052045A priority Critical patent/KR100291749B1/en
Publication of KR20000034661A publication Critical patent/KR20000034661A/en
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Publication of KR100291749B1 publication Critical patent/KR100291749B1/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
    • F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
    • F16C9/02—Crankshaft 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
    • F16C33/1065—Grooves on a bearing surface for distributing or collecting the liquid
    • 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
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
    • F16C33/1085—Channels or passages to recirculate the liquid in the bearing

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

PURPOSE: A structure of a cylinder block and a crank shaft bearing with an oil passage for a vehicle is provided to reduce friction heat of a crank shaft and a bearing and to make the circulation of oil prompt. CONSTITUTION: An oil delivered via a though hole(36a) of an upper bearing (26) is returned to an oil fan via two return holes(38) formed on a main bearing cap(12) fixed to the bottom of a cylinder block. A gap able to form an oil film is formed by a slit formed on the bottom of the cylinder block. The oil delivered to a lower bearing (28) is returned via the return holes promptly after lubricating a crank pin part. Thereby the friction heat of the inner faces of upper and lower bearing s(26,28) and the crank pin part is cooled promptly.

Description

오일통로가 형성된 자동차용 실린더블록과 크랭크축 베어링의 구조Structure of Automobile Cylinder Block and Crankshaft Bearing with Oil Path

본 발명은 오일통로가 형성된 자동차용 실린더블록과 크랭크축 베어링의 구조에 관한 것으로서, 보다 상세하게는 크랭크축의 크랭크핀부를 감싸는도록 2분할되어 구비되는 베어링과, 실린더블록의 저면에 홀과 요홈을 형성하여 크랭크축에 오일이 보다 신속하고 효과적으로 유입되도록 하여 크랭크축과 베어린과의 마찰력을 감소시킬 수 있도록 한 오일통로가 형성된 자동차용 실린더블록과 크랭크축 베어링의 구조에 관한 것이다.The present invention relates to a structure of an automobile cylinder block and a crankshaft bearing in which an oil passage is formed. More specifically, a bearing is provided in two parts so as to surround a crank pin portion of a crankshaft, and a hole and a recess are formed in a bottom surface of the cylinder block. The present invention relates to a structure of an automobile cylinder block and a crankshaft bearing in which an oil passage is formed so that oil can be introduced into the crankshaft more quickly and effectively to reduce friction between the crankshaft and the bearrin.

잘 알려진 바와 같이 내연기관은 연소실로 흡입되는 혼합기를 연소시켜 이에 발생되는 폭발력으로 피스톤을 상.하 직선 왕복운동시키고 이의 직선 왕복운동을 크랭크 기구로서 회전운동으로 변환시켜 회전동력을 얻는 것으로서 자동차 엔진의 그 대표적인 예로 들 수 있다.As is well known, the internal combustion engine burns the mixer sucked into the combustion chamber and expels the piston up and down linearly with the explosive force generated therein, and converts its linear reciprocating motion into the rotational movement as a crank mechanism to obtain rotational power. The representative example is that.

여기서 상기 크랭크축은 동력행정에 있어서 가장 중요한 부분으로서, 이의 크랭크축에 각종의 보기를 연결하여 구동시키게 된다.In this case, the crankshaft is the most important part of the power stroke, and the various crankshafts are driven by driving the crankshaft.

첨부된 도면 도 1은 이와 같은 크랭크축의 전형을 도시한 것으로서, 크랭크축(10)은 대분하여 실린더블록(미도시) 저면에 메인베어링캡(12)에 의해 지지되는 저어널부(14)와, 커넥팅로드(미도시)의 대단부가 연결되는 크랭크핀부(16)와, 상기 저어널부(14)와 크랭크핀부(16)를 연결하는 크랭크 암(18)으로 이루어져 있다.1 is a view illustrating an example of such a crankshaft, and the crankshaft 10 is largely connected to the journal part 14 supported by the main bearing cap 12 on the bottom of the cylinder block (not shown). The crank pin portion 16 is connected to the large end of the rod (not shown), and the crank arm 18 is connected to the journal portion 14 and the crank pin portion 16.

이와 같이 이루어진 크랭크축(10)은 도 1 내지 도 3에 도시된 바와 같이 크랭크축(10) 조립시에는 상기 메인베어링캡(12)의 양측에 형성된 결합홀(20)과 실린더블록(22)의 저면 양측에 형성된 고정홀(24)을 통하여 볼트(5)로 고정시키도록 되어 있다.1 and 3, the crankshaft 10 is assembled with the coupling hole 20 and the cylinder block 22 formed at both sides of the main bearing cap 12 when the crankshaft 10 is assembled. The bolt 5 is fixed through the fixing holes 24 formed on both sides of the bottom surface.

이때 상기 크랭크축(10)의 크랭크핀부(16)에는 상기 크랭크축(10)을 회전가능하게 어퍼와 로어베어링(26,28)이 그 외주연을 감싸면서 구비되어 있다.At this time, the crank pin portion 16 of the crank shaft 10 is provided with upper and lower bearings 26 and 28 surrounding the outer periphery so as to rotate the crank shaft 10.

이때, 상기 메인베어링캡(12)의 내측면에 그 외주면이 접면되어 크랭크핀부(16)의 외주연을 덮는 어퍼베어링(26)과, 이 어퍼베어링(26)과 노치 끼워맞춤되는 로어베어링(28)으로 이루어 진다. 상기 어퍼베어링(26) 내측면에는 이 내주면을 따라 홈(26a)이 형성되고, 그 일측에는 홀(26b)이 형성되어 있다. 또한, 상기 로어베어링(28) 일측에는 도 3에 도시된 실린더블록(22) 저면에 형성된 오일홀(32)과 결합시 일치되는 위치에 가이드홀(30)이 형성되어 있다.At this time, the outer circumferential surface is in contact with the inner surface of the main bearing cap 12, the upper bearing 26 to cover the outer periphery of the crank pin portion 16, and the lower bearing 26 is notch fit with the upper bearing 26 ) A groove 26a is formed along the inner circumferential surface of the upper bearing 26, and a hole 26b is formed on one side thereof. In addition, a guide hole 30 is formed at one side of the lower bearing 28 at a position coincident with the oil hole 32 formed on the bottom surface of the cylinder block 22 shown in FIG. 3.

이와 같이 구비된 크랭크축(10)이 실린더블록(22)의 저면에 결합되면 도 2b에 도시된 바와 같이 오일팬(미도시)에 저장되어 있는 오일이 압송되어 상기 실린더블록(22)의 오일홀(32)을 통하여 로어베어링(28)의 가이드홀(30)로 유입된다. 상기 로어베어링(28)의 가이드홀(30)을 통하여 유입된 오일은 크랭크축(10)의 회전으로 상기 로어베어링(28)의 내측면과 크랭크축(10)의 크랭크핀부(16)를 따라 유동되어 어퍼베어링(26)의 내측면에 형성된 홈(26a)측으로 유동되면서 크랭크축(10)과 어퍼 및 로어베어링(26,28)의 접동부를 윤활하게 된다. 이후 윤활된 오일은 상기 어퍼베어링(26) 홀(26b)을 통하여 오일팬측으로 리턴하게 된다.When the crankshaft 10 provided as described above is coupled to the bottom surface of the cylinder block 22, oil stored in an oil pan (not shown) is pressurized as shown in FIG. 2B, and the oil hole of the cylinder block 22 is compressed. It is introduced into the guide hole 30 of the lower bearing 28 through the (32). Oil introduced through the guide hole 30 of the lower bearing 28 flows along the crank pin portion 16 of the crank shaft 10 and the inner surface of the lower bearing 28 by the rotation of the crank shaft 10. As a result, the crankshaft 10 and the sliding parts of the upper and lower bearings 26 and 28 are lubricated while flowing toward the groove 26a formed on the inner side of the upper bearing 26. The lubricated oil is then returned to the oil pan side through the upper bearing 26 hole 26b.

상술한 바와 같이 오일은 상기 크랭크축(10)과 로어,어퍼베어링(26,28)의 접속동 뿐 만아니라 각부 엔진베어링은 실린더블록(22)의 오일통로와 연결되어 오일을 공급받아 유막이나 오일층을 이루어 상기 베어링(26,28)과 크랭크축(10)의 금속간 접속이 일어나지 않도록 하며, 동시에 상기 크랭크축(10)의 회전시 발생한 열을 흡수하여 냉각작용도 함께 하게 된다.As described above, the oil is not only connected to the crankshaft 10 and the lower and upper bearings 26 and 28, but each engine bearing is connected to the oil passage of the cylinder block 22 and supplied with oil to receive an oil film or oil. The metal layer of the bearings 26 and 28 and the crankshaft 10 are prevented from forming in layers, and at the same time, the cooling occurs by absorbing heat generated when the crankshaft 10 rotates.

이와 같이 오일은 유막이나 오일층을 형성하여 금속간의 접속이 일어나지 않도록 간극을 갖추고 있어야 한다.In this way, the oil must have a gap so as to form an oil film or an oil layer so that metal-to-metal connections do not occur.

그러나, 상기 실린더블록(22)의 저면과 로어베어링(28)의 외주면은 도 2b에 도시된 바와 같이 메인베어링캡(12)으로 압착시켜 그 접촉부가 면접촉되기 때문에 접촉면 사이에 유막을 형성시키기 위한 간극이 형성되지 않게 되어 있다. 이로 인하여 실린더블록(22)과 로어베어링(28)의 접촉면의 마모가 발생되는 문제점이 있었다.However, since the bottom surface of the cylinder block 22 and the outer circumferential surface of the lower bearing 28 are compressed by the main bearing cap 12 as shown in FIG. 2B, the contact portions thereof are in surface contact, so as to form an oil film between the contact surfaces. The gap is not formed. For this reason, there is a problem that wear of the contact surface of the cylinder block 22 and the lower bearing 28 occurs.

또한, 상기 로어베어링(28) 가이드홀(30)로 유입된 오일은 크랭크축(10)의 회전으로 인하여 온도가 상승되게 된다. 이와 같이 온도상승된 오일은 신속하게 리턴되어 상승된 온도를 냉각시켜야 하나 상기 베어링 내측부으로 유입된 오일을 어퍼베어링(26)의 홈(26a) 일측에 형성된 홀(26b)을 통하여 리턴되게 되므로 신속한 냉각작용을 하지 못하게 되는 문제점이 있었다,In addition, the oil introduced into the lower bearing 28 guide hole 30 is increased in temperature due to the rotation of the crankshaft (10). The elevated temperature oil must be quickly returned to cool the elevated temperature, but the oil introduced into the bearing inner part is returned through the hole 26b formed at one side of the groove 26a of the upper bearing 26, so that the rapid cooling is possible. There was a problem that prevented it from working,

본 발명은 상기와 같은 문제점을 해소하기 위하여 안출된 것으로서, 실린더블록의 저면에 오일을 가이드할 수 있는 홈을 형성하고, 크랭크핀부에 상.하로 분할되어 결합되는 베어링과, 메인베어링캡에 관통된 홀을 형성하여, 상기 실린더블록과 로어베어링사이에는 유막을 형성할 수 있는 간극이 형성되도록 함으로써, 크랭크축과 베어링과의 마찰열을 감소시킴과 동시에 보다 신속하게 오일의 순환이 이루어질 수 있도록 한 오일통로가 형성된 자동차용 실린더블록과 크랭크축 베어링의 구조를 제공함에 그 목적이 있다.The present invention has been made in order to solve the above problems, forming a groove for guiding oil in the bottom of the cylinder block, the bearing is divided into the upper and lower parts of the crank pin and coupled to the main bearing cap By forming a hole, a gap is formed between the cylinder block and the lower bearing to form an oil film, thereby reducing the frictional heat between the crankshaft and the bearing, and at the same time, the oil passage to allow the oil to circulate more quickly. The purpose is to provide a structure of the cylinder block and the crankshaft bearing is formed.

상술한 목적을 달성하기 위해 본 발명은 실린더블록 저면에 메인베어링캡에 의해 지지되는 저어널부와, 커넥팅로드의 대단부가 연결되는 크랭크핀부와, 상기 저어널부와 크랭크핀부를 연결하는 크랭크암과, 상기 크랭크핀부의 외주연에 어퍼베어링과 로어베어링으로 2분할되어 크랭크축의 크랭크핀부를 감싸고 있는 크랭크축에 있어서, 상기 실린더블록의 저면에 형성된 오일홀과 연통되는 장홈과; 상기 장홈으로 압송되는 오일을 유동시킬수 있도록 상기 어퍼베어링과 로어베어링의 원주방향으로 관통되게 형성되는 2개의 관통홀과; 상기 실린더블록의 저면과 볼트 고정되는 메인베어링캡에는 오일을 신속하게 리턴시킬 수 있도록 상기 로어 및 어퍼베어링에 각각 형성된 2개의 관통홀과 일치되는 위치에 형성되는 2개의 리턴홀;을 포함하는 것을 특징으로 한다.In order to achieve the above object, the present invention provides a journal part supported by a main bearing cap on a cylinder block bottom, a crank pin part connected to a large end of a connecting rod, a crank arm connecting the journal part and a crank pin part, and A crank shaft which is divided into an upper bearing and a lower bearing on the outer periphery of the crank pin portion and surrounds the crank pin portion of the crank shaft, the long groove communicating with an oil hole formed at the bottom of the cylinder block; Two through holes formed to penetrate in the circumferential direction of the upper bearing and the lower bearing so as to allow the oil pressurized into the long groove to flow; A main bearing cap bolted to the bottom of the cylinder block and two return holes formed at positions coinciding with the two through holes formed in the lower and upper bearings so that oil can be quickly returned. It is done.

도 1은 종래의 전형적인 크랭크축을 도시한 분해사시도1 is an exploded perspective view showing a typical crankshaft in the related art

도 2a는 종래의 전형적인 실린더블록에 크랭크축이 메인베어링캡에 의해 고정되는 상태를 나타낸 도면Figure 2a is a view showing a state in which the crankshaft is fixed by the main bearing cap to a conventional typical cylinder block

도 2b는 도 2a의 A-A'선에 따른 단면도FIG. 2B is a cross-sectional view taken along the line AA 'of FIG. 2A

도 3은 종래의 전형적인 실린더블록을 저면에서 나타낸 평면도Figure 3 is a plan view showing a conventional typical cylinder block from the bottom

도 4는 본 발명에 따른 오일통로가 형성된 자동차용 실린더블록을 저면에서 나타낸 평면도Figure 4 is a plan view showing a cylinder block for a vehicle formed with an oil passage in accordance with the present invention from the bottom

도 5는 본 발명에 따른 오일통로가 형성된 크랭크축의 베어링 구조를 나타낸 사시도Figure 5 is a perspective view showing the bearing structure of the crankshaft oil passage formed in accordance with the present invention

도 6은 본 발명에 따른 오일통로가 형성된 자동차용 실린더블록과 크랭크축 베어링의 구조의 결합상태를 나타낸 단면도Figure 6 is a cross-sectional view showing a coupling state of the structure of the cylinder block and the crankshaft bearing for automobiles having an oil passage according to the present invention

* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

5 : 볼트 10 : 크랭크축5 bolt 10 crankshaft

12 : 메인베어링캡 14 : 저어널부12: main bearing cap 14: journal portion

16 : 크랭크핀부 18 : 크랭크암16: crank pin part 18: crank arm

20 : 결합홀 22 : 실린더블록20: coupling hole 22: cylinder block

24 : 고정홀 26 : 어퍼베어링24: fixing hole 26: upper bearing

26a : 홈 26b : 홀26a: home 26b: hall

28 : 로어베어링 30 : 가이드홀28: lower bearing 30: guide hole

32 : 오일홀 34 : 장홈32: oil hole 34: long groove

36, 36a : 관통홀 38 : 리턴홀36, 36a: through hole 38: return hole

이하 본 발명을 첨부된 예시도면에 의거하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 3a는 본 발명에 따른 오일통로가 형성된 자동차용 실린더블록을 저면에서 나타낸 도면이고, 3b는 본 발명에 따른 오일통로가 형성된 크랭크축의 베어링 구조를 나타낸 도면이다.Figure 3a is a view showing a cylinder block for a vehicle having an oil passage in accordance with the present invention from the bottom, 3b is a view showing a bearing structure of the crankshaft formed oil passage in accordance with the present invention.

도시된 바와 같이 본 발명은 실린더블록(22) 저면에 메인베어링캡(12)에 의해 지지되는 저어널부(14)와, 커넥팅로드의 대단부가 연결되는 크랭크핀부(16)와, 상기 저어널부(14)와 크랭크핀부(16)를 연결하는 크랭크암(18)과, 상기 크랭크핀부(16)의 외주연에 어퍼베어링(26)과 로어베어링(28)으로 2분할되어 구비되는 크랭크축에 있어서, 상기 실린더블록(22)의 저면에 형성된 오일홀(32)과 연통되는 장홈(34)이 형성되며, 상기 로어베어링(28)과 어퍼베어링(26)에는 상기 장홈(34)으로 압송되는 오일을 통과시킬 수 있도록 원주방향으로 관통되게 2개의 관통홀(36,36a)이 각각 형성된다.As shown, the present invention includes a journal portion 14 supported by the main bearing cap 12 on the bottom surface of the cylinder block 22, a crank pin portion 16 to which a large end of the connecting rod is connected, and the journal portion 14. Crank arm (18) connecting the crank pin portion (16) and the crank pin portion (16) and an upper bearing (26) and a lower bearing (28) on the outer periphery of the crank pin portion (16). Long groove 34 is formed in communication with the oil hole 32 formed on the bottom surface of the cylinder block 22, the lower bearing 28 and the upper bearing 26 to pass the oil pumped into the long groove (34). Two through holes 36 and 36a are formed to penetrate in the circumferential direction, respectively.

또한, 상기 실린더블록(22)의 저면과 볼트(5) 고정되는 메인베어링캡(12)에는 오일을 신속하게 리턴시킬 수 있도록 상기 어퍼베어링(26)에 형성된 2개의 관통홀(28a)과 일치되게 2개의 리턴홀(38)이 형성된다.In addition, the main bearing cap 12 fixed to the bottom surface of the cylinder block 22 and the bolts 5 may be matched with the two through holes 28a formed in the upper bearing 26 so as to return oil quickly. Two return holes 38 are formed.

이와 같이 본 발명에 따른 오일통로가 형성된 자동차용 실린더블록과 크랭크축 베어링을 결합하여 오일을 압송시키게 되면 도 4에 도시된 바와 같이 크랭크축(10) 회전시 오일펌프에 의해 오일이 실린더블록(22)으로 압송되고, 이 압송된 오일은 실린더블록(22)의 오일홀(32)을 통하여 실린더블록(22)의 저면에 상기 오일홀(32)과 연통된 장홈(34)을 따라 압송되게 된다. 상기 실린더블록(22) 저면에 형성된 장홈(34)을 따라 압송된 오일은 상기 실린더블록(22)의 저면에 접지된 로어베어링(28)에 형성된 2개의 관통홀(36)을 통하여 크랭크축(10)의 크랭크핀부(16)를 윤활하고, 상기 크랭크핀부(16)를 윤활한 오일은 어퍼베어리(26)에 형성된 관통홀(36a)을 통하여 압송된다.As such, when the oil cylinder is coupled to the automobile cylinder block and the crankshaft bearing having the oil passage according to the present invention to pressurize the oil, the oil is moved by the oil pump during the rotation of the crankshaft 10 as shown in FIG. 4. ), And the pressurized oil is pumped along the long groove 34 communicated with the oil hole 32 to the bottom of the cylinder block 22 through the oil hole 32 of the cylinder block 22. The oil conveyed along the long grooves 34 formed on the bottom surface of the cylinder block 22 is formed on the crankshaft 10 through two through holes 36 formed on the lower bearing 28 grounded on the bottom surface of the cylinder block 22. Lubrication of the crank pin 16 of the crank pin 16, the oil is lubricated through the through hole (36a) formed in the upper bearing (26).

상기 어퍼베어링(26)의 관통홀(36a)을 통하여 압송된 오일은 그 양단이 실린더블록(22)의 저면과 볼트고정되는 메인베어링캡(12)에 형성된 2개의 리턴홀(38)을 통하여 오일팬측으로 리턴되게 된다.The oil pressurized through the through hole 36a of the upper bearing 26 has an oil through two return holes 38 formed at the main bearing cap 12, both ends of which are bolted to the bottom of the cylinder block 22. Will be returned to the pan side.

이와 같이 실린더블록(22)의 저면에 형성된 장홈(34)으로 인하여 유막을 형성시킬 수 있는 간극이 형성되고, 또한 상기 로어베어링(28)측으로 압송된 오일이 크랭크핀부(16)를 윤활시킨 다음 신속하게 메인베어링캡(12)에 형성된 리턴홀(38)을 통하여 리턴되게 되므로 어퍼 및 로어베어링(26,28) 내부면과 크랭크핀부(16)의 마찰열을 신속하게 냉각시킬 수 있게 되는 것이다.Thus, a gap for forming an oil film is formed due to the long groove 34 formed on the bottom surface of the cylinder block 22, and the oil pressurized to the lower bearing 28 lubricates the crank pin 16 and then quickly. It is to be returned through the return hole 38 formed in the main bearing cap 12 so that the frictional heat of the upper and lower bearings 26 and 28 and the crank pin portion 16 can be quickly cooled.

이상 상술한 바와 같이 실린더블록의 저면에 오일홀과 일측이 연통되게 장홈을 형성하고, 크랭크핀부를 감싸고 있는 베어링측에 관통을 형성함으로써, 상기 실린더블록의 저면과 베어링이 접지되는 면사이에 유막을 형성할수 있게 되고, 또한 상기 베어링과 메인베어링캡에 형성된 2개의 관통홀과 리턴홀로 인하여 오일을 신속하게 리턴시킬 수 있으므로 크랭크핀부의 회전으로 인한 마찰열도 신속하게 냉각시킬 수 있는 것이다.As described above, an oil film is formed between the bottom surface of the cylinder block and the surface on which the bearing is grounded by forming a long groove so that one side of the cylinder block communicates with the oil hole on the bottom of the cylinder block, and forming a penetration through the bearing side surrounding the crank pin part. It is possible to form, and also through the two through holes and the return hole formed in the bearing and the main bearing cap it is possible to quickly return the oil can also quickly cool the frictional heat due to the rotation of the crank pin portion.

Claims (1)

실린더블록(22) 저면에 메인베어링캡(12)에 의해 지지되는 저어널부(14)와, 커넥팅로드의 대단부가 연결되는 크랭크핀부(16)와, 상기 저어널부(14)와 크랭크핀부(16)를 연결하는 크랭크암(18)과, 상기 크랭크핀부(16)의 외주연에 어퍼베어링(26)과 로어베어링(28)으로 2분할되어 크랭크축(10)의 크랭크핀부(16)를 감싸고 있는 크랭크축에 있어서,The journal portion 14 supported by the main bearing cap 12 on the bottom of the cylinder block 22, the crank pin portion 16 is connected to the large end of the connecting rod, the journal portion 14 and the crank pin portion 16 The crank arm 18 and the crank pin portion 16 is divided into an upper bearing 26 and a lower bearing 28 on the outer circumference of the crank pin portion 16 to surround the crank pin portion 16 of the crank shaft 10. In the axis, 상기 실린더블록(22)의 저면에 형성된 오일홀(32)과 연통되는 장홈(34)과;A long groove 34 communicating with an oil hole 32 formed at a bottom of the cylinder block 22; 상기 장홈(34)으로 압송되는 오일을 유동시킬수 있도록 상기 어퍼베어링(26)과 로어베어링(28)의 원주방향으로 관통되게 형성되는 2개의 관통홀(36a,36)과;Two through holes (36a, 36) formed to penetrate in the circumferential direction of the upper bearing (26) and the lower bearing (28) so as to allow the oil conveyed to the long groove (34); 상기 실린더블록(22)의 저면과 볼트(5) 고정되는 메인베어링캡(12)에는 오일을 신속하게 리턴시킬 수 있도록 상기 로어 및 어퍼베어링(28,26)에 형성된 2개의 관통홀(36,36a)과 일치되는 위치에 형성되는 2개의 리턴홀(38);을 포함하는 것을 특징으로 하는 오일통로가 형성된 자동차용 실린더블록과 크랭크축 베어링의 구조.The main bearing cap 12 fixed to the bottom surface of the cylinder block 22 and the bolt 5 has two through holes 36 and 36a formed in the lower and upper bearings 28 and 26 so as to quickly return oil. The cylinder block and the crankshaft bearing structure for the automobile is formed, characterized in that it comprises a; and two return holes (38) formed at a position corresponding to.
KR1019980052045A 1998-11-30 1998-11-30 Structure of automotive cylinder block and crankshaft bearing with oil passage KR100291749B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101368015B1 (en) * 2010-02-25 2014-02-26 미츠비시 쥬고교 가부시키가이샤 Main bearing of internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101368015B1 (en) * 2010-02-25 2014-02-26 미츠비시 쥬고교 가부시키가이샤 Main bearing of internal combustion engine

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