KR19980049974U - Piston with thermal expansion reduction structure - Google Patents

Piston with thermal expansion reduction structure Download PDF

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Publication number
KR19980049974U
KR19980049974U KR2019960063144U KR19960063144U KR19980049974U KR 19980049974 U KR19980049974 U KR 19980049974U KR 2019960063144 U KR2019960063144 U KR 2019960063144U KR 19960063144 U KR19960063144 U KR 19960063144U KR 19980049974 U KR19980049974 U KR 19980049974U
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KR
South Korea
Prior art keywords
piston
thermal expansion
boss portion
pin
present
Prior art date
Application number
KR2019960063144U
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Korean (ko)
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KR200159875Y1 (en
Inventor
이현채
Original Assignee
박병재
현대자동차 주식회사
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Priority to KR2019960063144U priority Critical patent/KR200159875Y1/en
Publication of KR19980049974U publication Critical patent/KR19980049974U/en
Application granted granted Critical
Publication of KR200159875Y1 publication Critical patent/KR200159875Y1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00Pistons 
    • F02F3/02Pistons  having means for accommodating or controlling heat expansion
    • F02F3/04Pistons  having means for accommodating or controlling heat expansion having expansion-controlling inserts
    • F02F3/08Pistons  having means for accommodating or controlling heat expansion having expansion-controlling inserts the inserts being ring-shaped

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

본 고안의 목적은 상하좌우의 열팽창을 줄임과 동시에 균일하게 하고 진원으로 피스톤 몸체를 형성하므로써 저온구동시의 소음발생 및 스모크 배출량을 저감하는 구조의 피스톤을 제공하는 데 있다.It is an object of the present invention to provide a piston having a structure that reduces noise generation and smoke emissions during low temperature driving by reducing the thermal expansion of the top, bottom, left and right while making it uniform and forming the piston body in a round shape.

상기한 목적을 달성하기 위하여 본 고안은 커넥팅로드와 접속하는 피스톤핀을 끼워 지지하는 핀보스부가 구비된 피스톤에 있어서, 상기 핀보스부 90° 회전위치에 보스부를 추가로 형성하며 상기 4개의 보스부를 연결하여 지지하는 열팽창 방지용 고리가 구비되어 있는 것을 특징으로 한다.In order to achieve the above object, the present invention provides a piston having a pin boss portion for fitting a piston pin connected to a connecting rod, wherein the boss portion is further formed at a 90 ° rotational position of the pin boss portion, and the four boss portions are provided. It is characterized in that the ring for preventing the thermal expansion to support the connection.

Description

열팽창 저감구조의 피스톤Piston with thermal expansion reduction structure

본 고안은 열팽창 저감구조의 피스톤에 관한 것이다.The present invention relates to a piston of a thermal expansion reduction structure.

피스톤은 실린더내를 왕복 운동하며 팽창 행정에서 고온·고압의 가스압력을 받아 이것을 커넥팅로드를 거쳐서 크랭크축에 회전력을 전달해주는 기구이다.The piston reciprocates in the cylinder and receives the gas pressure of high temperature and high pressure in the expansion stroke and transmits the rotational force to the crankshaft through the connecting rod.

또한 피스톤은 2000℃ 이상의 연소가스에 노출되고 고압력을 단시간에 충격적으로 받을 뿐만 아니라 실린더내를 고속으로 운동하므로 실린더벽과의 사이에 강한 마찰이 생긴다.In addition, the piston is exposed to the combustion gas of 2000 ° C. or higher and receives a high pressure shock in a short time, and moves the cylinder at a high speed so that a strong friction occurs between the cylinder wall.

종래의 피스톤을 도 2에 도시하였는바 피스톤(1)은 원통형으로 최상부의 피스톤헤드(11) 상부 랜드부에 형성된 링홈(12) 하부의 스컷부(13)로 형성되고 커넥팅로드와 연결하기 위한 피스톤핀(14)을 끼워 지지하기 위하여 보스부(15)가 형성되어 있다.As shown in FIG. 2, the piston 1 has a cylindrical shape and is formed of a cut portion 13 below the ring groove 12 formed in the upper land portion of the upper piston head 11 and a piston for connecting to the connecting rod. The boss portion 15 is formed to hold the pin 14.

그러나 상기한 구조는 핀보스부(15)가 2개소에 있어 보스부(15)가 형성된 부분은 살두께가 두꺼워 고온의 열을 받을 경우 상하 좌우의 열팽창이 차이가 나서 타원형으로 찌그러지므로 이를 고려하여 미리 타원형으로 제작하게 되므로써 피스톤(10)이 열을 받아 원형이 되지 아니한 상태, 즉 냉간저온 구동시 소음이 발생하고 스모크 발생이 증가하는 문제점이 있다.However, the structure described above has two pin bosses 15 so that the bosses 15 are formed at a thicker thickness. Since the piston 10 is not circular because it is manufactured in an elliptical shape in advance, that is, noise is generated during cold low temperature driving and smoke is increased.

이에 본 고안은 상기한 문제점을 감안하여 제안된 것으로서 그의 목적으로 하는 바는 상하좌우의 열팽창을 줄임과 동시에 균일하게 하고 진원으로 피스톤 몸체를 형성하므로써 저온구동시의 소음발생 및 스모크 배출량을 저감하는 구조의 피스톤을 제공하는 데 있다.The present invention has been proposed in view of the above problems, and its purpose is to reduce the thermal expansion of the top, bottom, left and right, and to uniformly form the piston body in a round shape to reduce noise generation and smoke emission during low temperature driving. To provide the piston.

상기한 목적을 달성하기 위하여 본 고안은 커넥팅로드와 접속하는 피스톤핀을 끼워 지지하는 핀보스부가 구비된 피스톤에 있어서, 상기 핀보스부 90°회전위치에 보스부를 추가로 형성하며 상기 4개의 보스부를 연결하여 지지하는 열팽창 방지용 고리가 구비되어 있는 것을 특징으로 한다.In order to achieve the above object, the present invention provides a piston having a pin boss portion for pinching a piston pin connected to a connecting rod, wherein the pin boss portion further includes a boss portion at a 90 ° rotational position, and the four boss portions. It is characterized in that the ring for preventing the thermal expansion to support the connection.

도 1은 본 고안에 의한 열팽창 저감구조의 피스톤을 나타내는 도면1 is a view showing a piston of the thermal expansion reduction structure according to the present invention

도 2는 종래 구조의 피스톤2 is a piston of the conventional structure

*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

1:피스톤2:핀보스부1: piston 2: pin boss

3:핀구멍4:보스부3: pin hole 4: boss

5:고리5: ring

이하 본 고안의 구성과 작용을 첨부한 도면을 참조하여 설명한다.Hereinafter, with reference to the accompanying drawings the configuration and operation of the present invention.

도 1은 본 고안에 의한 열팽창 방지구조의 피스톤의 저면도로서 본 고안의 피스톤(1)은 제작시에 타원형이 아닌 진원으로 가공된다.1 is a bottom view of a piston of a thermal expansion prevention structure according to the present invention, the piston 1 of the present invention is processed in a round shape rather than an elliptical shape at the time of manufacture.

부호 2는 커넥팅로드에 연결되는 피스톤핀을 핀구멍(3)으로 삽입하여 지지하기 위하여 내측으로 돌출된 두꺼운 살두께인 핀보스부(2)이며 부호 4는 핀보스부(2)와 같은 형태로 90°회전된 위치에 돌출되는 살부분인 보스부이다.Reference numeral 2 denotes a pin boss portion 2 having a thick flesh projecting inwardly to insert and support the piston pin connected to the connecting rod through the pin hole 3, and reference numeral 4 denotes the same as the pin boss portion 2; It is a boss part that protrudes in a 90 ° rotated position.

그리고 상기 4개의 보스부(2)(4)를 하나로 묶어주는 열팽창 방지를 위한 고리(5)가 구비되어 있다.And it is provided with a ring (5) for preventing thermal expansion that binds the four bosses (2) (4) into one.

여기서 고리(5)를 별도로 제작하여 끼우는 것도 가능하나 각 보스부(2)(4)를 연결하여 지지하도록 일체로 주물제작하는 것이 바람직하다.In this case, it is also possible to manufacture and insert the ring 5 separately, but it is preferable that the casting is integrally made to connect and support each boss part 2 and 4.

이에 따라 보스부(2)(4)가 4개소에 90°간격으로 분산되어 있어 열팽창이 고르게 발생하므로 저온이나 고온시 동일한 진원을 유지하게 되며 또 고리(5)에 의해서 열팽창이 억제 되어지게 된다.As a result, the bosses 2 and 4 are dispersed in four places at 90 ° intervals so that thermal expansion occurs evenly, so that the same circularity is maintained at low or high temperatures, and thermal expansion is suppressed by the ring 5.

이상과 같은 본 고안은 피스톤 핀보스부와 동일 형상의 보스부를 90°회전위치에 추가로 형성하고 각 보스부를 고리로 묶어주므로써 상하 좌우의 고른 열팽창이 유지되므로 열팽창 차이를 고려하여 피스톤의 몸체를 타원형으로 만들 필요가 없어져 엔진의 저온구동시 피스톤 타음발생 및 스모크 발생을 저감하게 되며 또한 열팽창도 줄어들게 되는 효과가 있다.The present invention as described above additionally forms a boss portion of the same shape as the piston pin boss portion at a 90 ° rotational position and binds each boss portion with a ring so that even thermal expansion is maintained in the vertical direction. There is no need to make an elliptical shape to reduce the occurrence of piston pulsation and smoke during low temperature operation of the engine, and also reduces thermal expansion.

Claims (1)

커넥팅로드와 접속하는 피스톤핀을 끼워 지지하는 핀보스부가 구비된 피스톤에 있어서,In the piston provided with a pin boss portion for holding the piston pin connected to the connecting rod, 상기 핀보스부 90°회전위치에 보스부를 추가로 형성하며 상기 4개의 보스부를 연결하여 지지하는 열팽창 방지용 고리가 구비되어 있는 것을 특징으로 하는 열팽창 저감구조의 피스톤.And a thermal expansion preventing ring for connecting and supporting the four bosses to further form a boss at a 90 ° rotational position of the pin boss.
KR2019960063144U 1996-12-30 1996-12-30 Low thermal expansion piston KR200159875Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019960063144U KR200159875Y1 (en) 1996-12-30 1996-12-30 Low thermal expansion piston

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019960063144U KR200159875Y1 (en) 1996-12-30 1996-12-30 Low thermal expansion piston

Publications (2)

Publication Number Publication Date
KR19980049974U true KR19980049974U (en) 1998-10-07
KR200159875Y1 KR200159875Y1 (en) 1999-11-01

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KR2019960063144U KR200159875Y1 (en) 1996-12-30 1996-12-30 Low thermal expansion piston

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