KR0167532B1 - Connecting rod with reduced weight - Google Patents
Connecting rod with reduced weight Download PDFInfo
- Publication number
- KR0167532B1 KR0167532B1 KR1019960022175A KR19960022175A KR0167532B1 KR 0167532 B1 KR0167532 B1 KR 0167532B1 KR 1019960022175 A KR1019960022175 A KR 1019960022175A KR 19960022175 A KR19960022175 A KR 19960022175A KR 0167532 B1 KR0167532 B1 KR 0167532B1
- Authority
- KR
- South Korea
- Prior art keywords
- connecting rod
- end portion
- large end
- aluminum alloy
- cast
- Prior art date
Links
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
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/02—Constructions of connecting-rods with constant length
- F16C7/023—Constructions of connecting-rods with constant length for piston engines, pumps or the like
-
- 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
- F16C2204/00—Metallic materials; Alloys
- F16C2204/20—Alloys based on aluminium
-
- 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
- F16C2220/00—Shaping
- F16C2220/02—Shaping by casting
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
본 발명은 커넥팅 로드에 관한 것으로, 피스톤 핀과 연결되는 소단부와 본체 및 크랭크 핀에 연결되는 대단부 전체를 알루미늄 합금으로 주조하되 대단부의 상부캡과 하부캡에서 크랭크 핀 베어링과 접하는 부분에 강성 보강용의 심재를 인써트하여 구성된다.The present invention relates to a connecting rod, in which a small end portion connected to a piston pin, and a large end portion connected to a main body and a crank pin are cast with an aluminum alloy, and a portion of the upper end cap and the lower cap contacting the crankpin bearing is reinforced And inserts the core material for the insert.
이로써, 대단부의 필요한 강성을 유지하면서 커넥팅 로드의 경량화로 연비 향상 및 내구성 개선의 효과가 있다.Thereby, there is an effect of improving the fuel consumption and improving the durability by reducing the weight of the connecting rod while maintaining the required rigidity at the large end portion.
Description
제1도는 종래 차량 커넥팅 로드의 구조을 보여주는 개략적인 구성도.1 is a schematic diagram showing a structure of a conventional vehicle connecting rod; Fig.
제2도는 본 발명에 따른 커넥팅 로드의 종단면도.FIG. 2 is a longitudinal sectional view of a connecting rod according to the present invention. FIG.
* 도면의 주요부분에 대한 부호의 설명DESCRIPTION OF THE REFERENCE NUMERALS
10 : 커넥팅 로드 11 : 소단부10: connecting rod 11: small end
12 : 본체 13 : 대단부12: main body 13:
15 : 하부캡 14 : 상부캡15: lower cap 14: upper cap
16 :볼트 17,18 : 베어링16: bolts 17,18: bearing
19 : 심재19: Core material
본 발명은 경량화 구조의 커넥팅 로드에 관한 것으로, 특히 대단부의 강성을 보강함과 함께 경량화한 커넥팅 로드에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting rod having a lightweight structure, and more particularly, to a connecting rod that reinforces rigidity of a large end portion and is lightweight.
제1도에 도시된 바와 같이 자동차의 커넥팅 로드(1)는 피스톤(2)과 크랭크 샤프트(3)를 연결하여 엔진 실린더에서의 폭발행정시 폭발력에 의한 피스톤(2)의 직선운동을 크랭크 샤프트(3)에 회전운동으로 전달하는 부분으로서, 피스톤 핀에 핀 연결되는 소단부(5)와, 본체(5) 및 크랭크 핀에 연결되는 대단부(6)로 이루어져 있다.1, a connecting rod 1 of an automobile connects a piston 2 and a crankshaft 3 so that the linear motion of the piston 2 due to an explosive force in an explosion stroke in an engine cylinder is transmitted to a crankshaft 3 as a rotational movement and comprises a small end portion 5 connected to the piston pin by a pin and a large end portion 6 connected to the main body 5 and the crank pin.
이러한 커넥팅 로드(1)에는 크랭크 샤프트(3)의 회전에 따라 흡입행정시에는 피스톤 상사점에서 하사점까지 잡아당기므로 인장하중이 작용하고 폭발행정시에는 압축하중과 굽힘 하중이 계속하여 교대로 작용하게 되고 특히 크랭크 각 80°∼ 90°의 위치에서는 관성력등에 의해 벤딩작용이 발생하므로 커넥팅 로드(1)는 이러한 환경에 충분히 견딜 수 있는 강도와 강성이 요구된다.Since the connecting rod 1 is pulled from the piston top dead center to the bottom dead center in the intake stroke in accordance with the rotation of the crank shaft 3, a tensile load is applied and a compressive load and a bending load are alternately operated Particularly at a crank angle of 80 ° to 90 °, a bending action occurs due to an inertia force or the like, so that the connecting rod 1 is required to have strength and rigidity enough to withstand such an environment.
그러나, 주철 또는 특수강재의 종래 커넥팅 구조는 그 중량이 매우 크고, 그 중량에 따라 커넥팅 로드(1)의 동작시 관성력 및 마찰력등이 증대된다.However, the conventional connecting structure of the cast iron or special steel has a very large weight, and inertia force and frictional force during operation of the connecting rod 1 are increased according to the weight thereof.
커넥팅 로드(1)의 중량이 크면 실린더에서 피스톤에 작용하는 폭발에너지의 손실을 초래하여 결국 커넥팅 로드(1)를 통해 크랭크 샤프트(3)를 회전시키는 실효에너지가 감소되므로, 연비와 같은 차량 성능 개선을 위해 커넥팅 로드(1)의 경량화가 요구되었다. 또한, 크랭크 핀과 연결되는 커넥팅 로드(1)의 대단부(6)에서 관성력에 의한 벤딩응력에 대한 강성 보강이 커넥팅 로드의 경량화를 위해 필요하였다.If the weight of the connecting rod 1 is large, the energy of explosion acting on the piston in the cylinder is lost, and consequently the effective energy for rotating the crankshaft 3 through the connecting rod 1 is reduced, A reduction in the weight of the connecting rod 1 has been required. Further, reinforcing the rigidity against the bending stress due to the inertia force at the large end portion 6 of the connecting rod 1 connected to the crank pin was required for weight reduction of the connecting rod.
본 발명의 목적은 상술한 종래 기술의 큰 중량을 지닌 커넥팅 로드에 따른 문제점을 해소하여 차량 성능을 위해 로드 대단부의 상부캡과 하부캡의 강성을 보강함과 함께 커넥팅 로드 전체를 알루미늄 합금으로 주조하여 경량한 구조의 커넥팅 로드를 제공하는 것이다.It is an object of the present invention to solve the above-mentioned problems associated with the conventional heavy connecting rod, to reinforce the rigidity of the upper and lower caps of the rod end for vehicle performance and to cast the entire connecting rod into an aluminum alloy And to provide a connecting rod of a lightweight structure.
본 고안에 따른 커넥팅 로드는 피스톤 핀과 연결되는 소단부와 본체 및 크랭크 핀에 연결되는 대단부 전체를 알루미늄 합금으로 주조하되 대단부의 상부캡과 하부캡에서 크랭크 핀 베어링과 접하는 부분에 강성 보강용의 심재를 인써트하여 구성된다.The connecting rod according to the present invention is formed by casting a small end portion connected to the piston pin and a large end portion connected to the main body and the crank pin with an aluminum alloy and a portion for contacting the crank pin bearing at the upper end cap and the lower end cap, And inserting the core material.
이하, 본 발명의 실시예를 도시한 첨부 도면을 참고하여 본 발명을 보다 상세히 설명하기로 한다.BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in more detail with reference to the accompanying drawings, which illustrate embodiments of the invention.
제2도에 있어서, 커넥팅 로드(10)는 피스톤 핀에 연결되는 소단부(11)와 본체(12) 및 크랭크 핀과 연결되는 대단부(13)로 구성된다. 상기 대단부(13)는 본체(12) 하단에 일체로 형성된 상부캡(14)과 하부캡(15)이 볼트(16)로 결합되며, 상기 상부캡(14)과 하부캡(15)의 내측면에는 화이트 메탈 또는 캘매트와 같은 베어링 합금의 상부와 하부 베어링(17,18)이 배치된다.2, the connecting rod 10 is composed of a small end portion 11 connected to the piston pin, and a large end portion 13 connected to the main body 12 and the crank pin. The upper end 14 and lower end 15 of the main body 12 are coupled to each other by bolts 16. The upper end of the upper end cap 14 and the lower end of the lower end 15 The upper and lower bearings (17, 18) of a bearing alloy such as a white metal or calette mat are disposed on the side surface.
본 발명에 따라, 커넥팅 로드(10) 전체를 알루미늄 합금으로 주조, 바람직하기로는 중력 다이캐스팅법에 의해 구조하며 커넥팅 로드를 경량화한다. 그러나, 커넥팅 로드(10)의 대단부(13)에는 피스톤의 상사점과 하사점에서 피스톤과 커넥팅 로드 전체의 왕복운동 질량을 합한 전체 질량의 관성력에 의한 벤딩응력이 작용하므로, 커넥팅 로드(10)를 알루미늄 합금으로 주조하여 경량화함과 함께 대단부의 강성을 보강해야 한다.According to the present invention, the entire connecting rod 10 is cast by an aluminum alloy, preferably by gravity die casting, and the connecting rod is made lightweight. Since the bending stress due to the inertial force of the total mass acting on the large end portion 13 of the connecting rod 10 at the top dead center and the bottom dead point of the connecting rod 10 plus the reciprocating mass of the piston and the entire connecting rod acts, Should be made of aluminum alloy to be lightweight and to reinforce the rigidity of the large end portion.
본 발명에 따라 이러한 커넥팅 로드(10) 대단부(13)의 강성보강은 상하부 베어링(17,18)을 보지하는 상기 대단부(13)의 상부캡(14)과 하부캡(15)의 내측표면부에 주철 또는 특수 주철재의 강성 보강용 심재(19)를 인써트 함으로써 달성된다. 상기 심재(19)를 상하부캡(14,15)에 인써트하는 것은 금형에 심재(19)를 미리 고정시켜 주조하며 이때 주철재의 심재(19)와 상하부캡(14,15)의 접촉부가 융착되어 그 결합강도가 증대된다. 이러한 접촉부 융착을 돕도록 심재(19)를 예열할 수도 있다.The rigidity reinforcement of the large end portion 13 of the connecting rod 10 according to the present invention is achieved by the inner surface of the upper cap 14 and the lower cap 15 of the large end portion 13 for holding the upper and lower bearings 17, (19) of cast iron or special cast steel. The core member 19 is inserted into the upper and lower caps 14 and 15 by previously fixing and casting the core member 19 on the metal mold. At this time, the contact portions of the core member 19 and the upper and lower caps 14 and 15 are fused The bonding strength is increased. The core member 19 may be preheated to facilitate such contact fusing.
본 발명에 따라, 커넥팅 로드(10)전체를 알루미늄 합금으로 주조하되 벤딩응력이 작용하는 대단부에 보강용 심재를 인써트 함으로써 필요한 강성을 가지면서도 커넥팅 로드의 중량을 25%까지 감소시켜 결국 연비향상의 효과를 얻음과 함께 알루미늄 합금의 큰 열팽창으로 인하여 베어링(17,18)과의 간격 증대로 노이즈가 발생되는 것도 베어링과 접촉하는 표면부에 주철재의 심재(19)를 사용하여 방지된다.According to the present invention, the whole connecting rod 10 is cast with an aluminum alloy, and the reinforcement core is inserted into the large end portion where the bending stress acts, thereby reducing the weight of the connecting rod to 25% And the noise is generated by increasing the gap with the bearings (17, 18) due to the large thermal expansion of the aluminum alloy, is prevented by using the core material (19) of the main steel on the surface portion in contact with the bearing.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019960022175A KR0167532B1 (en) | 1996-06-19 | 1996-06-19 | Connecting rod with reduced weight |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019960022175A KR0167532B1 (en) | 1996-06-19 | 1996-06-19 | Connecting rod with reduced weight |
Publications (2)
Publication Number | Publication Date |
---|---|
KR980006272A KR980006272A (en) | 1998-03-30 |
KR0167532B1 true KR0167532B1 (en) | 1999-03-30 |
Family
ID=19462419
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019960022175A KR0167532B1 (en) | 1996-06-19 | 1996-06-19 | Connecting rod with reduced weight |
Country Status (1)
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KR (1) | KR0167532B1 (en) |
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1996
- 1996-06-19 KR KR1019960022175A patent/KR0167532B1/en not_active IP Right Cessation
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Publication number | Publication date |
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KR980006272A (en) | 1998-03-30 |
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