JPH03145554A - Piston for internal combustion engine - Google Patents

Piston for internal combustion engine

Info

Publication number
JPH03145554A
JPH03145554A JP28380089A JP28380089A JPH03145554A JP H03145554 A JPH03145554 A JP H03145554A JP 28380089 A JP28380089 A JP 28380089A JP 28380089 A JP28380089 A JP 28380089A JP H03145554 A JPH03145554 A JP H03145554A
Authority
JP
Japan
Prior art keywords
piston
pipe
pin boss
cast
casting pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP28380089A
Other languages
Japanese (ja)
Inventor
Kouichirou Kurata
倉田　効市朗
Masataka Furukawa
古川　政孝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzuki Motor Corp
Original Assignee
Suzuki Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suzuki Motor Corp filed Critical Suzuki Motor Corp
Priority to JP28380089A priority Critical patent/JPH03145554A/en
Publication of JPH03145554A publication Critical patent/JPH03145554A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0448—Steel

Landscapes

  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

PURPOSE:To cool a piston, prevent the abrasion of a pin boss, and improve tensile strength by arranging a steel material in the head section of the piston, inserting a casting pipe on the inner periphery of the pin boss, connecting the steel material and the casting pipe. CONSTITUTION:A cooling casting pipe made of iron (steel material) 7 is cast along the inside of the head section 6a of a piston 6 cast with an aluminum material or the like. A casting pipe 9 made of iron is inserted on the inner periphery of the pin boss 8. Pipes 7 and 9 are cast while they are connected during casting. Oil passage holes 10 communicated to the cooling casting pipe 7 and piston ring grooves 11 are formed. Oil is fed into the cooling casting pipe 7 to cool the Piston 6, and also the abrasion of the pin boss 8 is prevented. The tensile strength of the pin boss section 8 is increased by the connection of pipes 7 and 9, and the durability of the piston 6 is improved.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、ピンボス部の引張り強度を向上させた。内燃
機関用ピストンに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention improves the tensile strength of the pin boss portion. This invention relates to a piston for an internal combustion engine.

（従来の技術） 一般に、ピストンのヘッド部はアルミ材で製作され、厚
肉部にオイルを循環させる通路が形成されている。これ
により、高温状態の熱負荷を軽減させ１強度を維持させ
ている。たとえば、ピストンクラウン部に冷却部を形成
させたもの（実開昭８０−１１０８４３号公報）やピス
トン内に油溜りを設けたもの（特開昭８０−１５３４５
３号公報）が知られている。また、第３図に示すように
、ピストンｌのヘッド部１ａに環状のパイプ２を鋳込み
、この内部にオイルを循環させることにより冷却するこ
とが知られている。一方、ピストンｌの側壁に形成され
たピストンピンボス３内には鉄製のピストンピンが挿入
されるため、ピンボス部を形成するアルミ材が摩耗する
。そのため、第４図に示すように、ピンボス３の内周面
に鉄製のパイプ４を鋳込むことがある。(Prior Art) Generally, the head portion of a piston is made of aluminum, and a passage for circulating oil is formed in the thick wall portion. This reduces the thermal load in the high temperature state and maintains the same strength. For example, a cooling part is formed in the piston crown (Japanese Unexamined Utility Model Publication No. 80-110843), and an oil reservoir is provided inside the piston (Japanese Unexamined Utility Model Publication No. 80-15345).
Publication No. 3) is known. Furthermore, as shown in FIG. 3, it is known that an annular pipe 2 is cast into the head portion 1a of the piston 1, and cooling is achieved by circulating oil inside the pipe 2. On the other hand, since an iron piston pin is inserted into the piston pin boss 3 formed on the side wall of the piston l, the aluminum material forming the pin boss portion is worn out. Therefore, as shown in FIG. 4, an iron pipe 4 is sometimes cast into the inner peripheral surface of the pin boss 3.

このように第３図の構成としたピストンは、ピストンｌ
内のパイプ２には通路孔５を通してオイルが流入し、ヘ
ッド部１ａの冷却の役割を果たし、また、第４図の構成
としたものはビンポス３内側のパイプ４はピストンピン
によるピンボス３の摩耗を防止する。In this way, the piston configured as shown in FIG.
Oil flows into the inner pipe 2 through the passage hole 5, and plays the role of cooling the head portion 1a.In addition, in the configuration shown in FIG. prevent.

（発明が解決しようとする課題） しかしながら、ピンボス３とヘッド間は構造上、力に弱
くピストン１の慣性力および燃焼爆発の衝撃力により亀
裂が生じやすく、上記のピンボス３内のパイプ４やヘッ
ド部１ａに鋳込んだパイプ２だけでは力に対しての強度
は得られない、このため、より耐久性のあるピストンが
望まれていた。(Problem to be Solved by the Invention) However, the structure between the pin boss 3 and the head is weak and easily cracks due to the inertial force of the piston 1 and the impact force of the combustion explosion. The pipe 2 cast into the portion 1a alone cannot provide enough strength to withstand the force, and therefore a more durable piston has been desired.

本発明は、ピンボス部の引張り強度の強い内燃機関用ピ
ストンを提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a piston for an internal combustion engine whose pin boss portion has high tensile strength.

（課題を解決するための手段） 本発明は上記目的を達成するために、ピストン６のヘッ
ド部りａ内側の内周に沿ってパイプ状または板状の鋼材
（冷却用鋳込パイプ７）を設けると共に、ピストン６の
ピンボス８の内周面に鋳込パイプ９を嵌挿し、前記パイ
プ状または板状の鋼材（７）を前記鋳込パイプ９と接合
したことを特徴とする。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a pipe-shaped or plate-shaped steel material (cooling cast pipe 7) along the inner periphery inside the head portion a of the piston 6. At the same time, a cast-in pipe 9 is fitted into the inner peripheral surface of the pin boss 8 of the piston 6, and the pipe-shaped or plate-shaped steel material (7) is joined to the cast-in pipe 9.

（作用） 上記の構成とすることによって、冷却用鋳込パイプ７（
鋼材）にオイルが流入することにより、ピストン６を冷
却することができ、また、ピンボス８に挿通するピスト
ンピンは鋳込パイプ９に支持されて摺動する。また、鋳
込パイプ９と前記冷却用鋳込パイプ７（または板状の鋼
材）とが接合していることによりピストン６のピンボス
８部の引張り強度を増やすことができる。(Function) With the above configuration, the cooling cast pipe 7 (
The piston 6 can be cooled by the oil flowing into the steel material), and the piston pin inserted into the pin boss 8 is supported by the cast pipe 9 and slides thereon. Moreover, the tensile strength of the pin boss 8 portion of the piston 6 can be increased by joining the casting pipe 9 and the cooling casting pipe 7 (or plate-shaped steel material).

（実施例） 次に、本発明の実施例を第１図および第２図に基づいて
説明する。これらの図に示すピストン６は、中心から半
分が図示されており、アルミ材で鋳造されたピストン６
のヘッド部６ａの内側の内周に沿って鉄製の冷却用鋳込
パイプ（鋼材）７が鋳込まれ、ピンボス８の内周面に鉄
製の鋳込パイプ９が嵌挿されている。鋳込パイプ９と冷
却用鋳込パイプ７とは鋳造時に接合した状態で鋳込んで
あり、また、このとき冷却用鋳込パイプ７に通じるオイ
ル通路用孔ｌＯおよびピストンリング溝１１が形成され
る。(Example) Next, an example of the present invention will be described based on FIGS. 1 and 2. The piston 6 shown in these figures is half shown from the center, and the piston 6 is cast from aluminum material.
An iron cooling casting pipe (steel material) 7 is cast along the inner circumference of the head portion 6a, and an iron casting pipe 9 is fitted into the inner peripheral surface of the pin boss 8. The cast pipe 9 and the cooling cast pipe 7 are cast in a joined state at the time of casting, and at this time, an oil passage hole lO and a piston ring groove 11 communicating with the cooling cast pipe 7 are formed. .

以上のように構成されたピストン６は、冷却用鋳込パイ
プ７にオイル通路用孔１０からオイルが流入され、また
、鋳込パイプ９に支持されたピストンピンがピストン６
の動きに合わせて摺動する。In the piston 6 configured as described above, oil flows into the cooling casting pipe 7 from the oil passage hole 10, and the piston pin supported by the casting pipe 9 is connected to the piston 6.
It slides according to the movement of.

これによって、ピストン６を冷却することができ、ピン
ボス８の摩耗が防出できる。また、鋳込パイプ９と冷却
用鋳込パイプ７とが接合していることによりピストン６
のピンボス８部の引張り強度が増え、ピストン６の慣性
力および燃焼爆発の衝撃力に対する耐゛久性を向上させ
た。なお、冷却用鋳込パイプ７の断面形状は実施例に限
定されない。Thereby, the piston 6 can be cooled and wear of the pin boss 8 can be prevented. Also, since the cast pipe 9 and the cooling cast pipe 7 are connected, the piston 6
The tensile strength of the pin boss 8 has been increased, improving the durability against the inertial force of the piston 6 and the impact force of combustion explosion. Note that the cross-sectional shape of the cooling casting pipe 7 is not limited to the embodiment.

また、他の実施例として、パイプ状鋼材の代りに板状の
鋼材を鋳込んでもよく、この場合には冷却効果は減じる
がピンボス部の強度は良くなる。Further, as another embodiment, a plate-shaped steel material may be cast instead of the pipe-shaped steel material, and in this case, the cooling effect will be reduced, but the strength of the pin boss portion will be improved.

なお、鋳造時の鋼材を鋳込む手段の変更はなく、従来と
同じなので煩わしさはない。Note that there is no change in the means for casting the steel material during casting, and it is the same as before, so there is no trouble.

（発明の効果） 本発明は、以上のように構成したものであり、ピストン
ヘッド部の冷却が可能で熱に対する疲労強度が上がると
共にピンボスの摩耗防止ができ、かつ、ピンボスの引張
り強度が向上したので、ピンボスとヘッド間の亀裂は防
止できる。また、鋼材がパイプ状の場合にはピストンの
厚肉部の中空化により軽量化が図れる。(Effects of the Invention) The present invention is configured as described above, and it is possible to cool the piston head, increase fatigue strength against heat, prevent wear of the pin boss, and improve tensile strength of the pin boss. Therefore, cracks between the pin boss and head can be prevented. Furthermore, when the steel material is pipe-shaped, weight reduction can be achieved by making the thick part of the piston hollow.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明に係るピストンの部分断面図、第２図は
第１図に示すピストンの断面図、第３図は従来の冷却部
を有するピストンの部分断面図。 第４図は他の従来のピストンの部分断面図である。 ６・・・ピストン ６ａ・・・ヘッド部 ７・・・冷却用鋳込パイプ ８・・・ピンボス ９・・・鋳込パイプ 特 許FIG. 1 is a partial sectional view of a piston according to the present invention, FIG. 2 is a sectional view of the piston shown in FIG. 1, and FIG. 3 is a partial sectional view of a piston having a conventional cooling section. FIG. 4 is a partial sectional view of another conventional piston. 6...Piston 6a...Head part 7...Cooling cast pipe 8...Pin boss 9...Cast pipe patent

Claims (1)

【特許請求の範囲】[Claims] （１）ピストンのヘッド部内側の内周に沿ってパイプ状
または板状の鋼材を設けると共に、ピストンのピンボス
の内周面に鋳込パイプを嵌挿し、前記パイプ状または板
状の鋼材を、前記鋳込パイプと接合したことを特徴とす
る内燃機関用ピストン。(1) A pipe-shaped or plate-shaped steel material is provided along the inner circumference inside the head portion of the piston, and a cast pipe is inserted into the inner peripheral surface of the pin boss of the piston, and the pipe-shaped or plate-shaped steel material is A piston for an internal combustion engine, characterized in that it is joined to the cast pipe.
JP28380089A 1989-10-31 1989-10-31 Piston for internal combustion engine Pending JPH03145554A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28380089A JPH03145554A (en) 1989-10-31 1989-10-31 Piston for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28380089A JPH03145554A (en) 1989-10-31 1989-10-31 Piston for internal combustion engine

Publications (1)

Publication Number Publication Date
JPH03145554A true JPH03145554A (en) 1991-06-20

Family

ID=17670309

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28380089A Pending JPH03145554A (en) 1989-10-31 1989-10-31 Piston for internal combustion engine

Country Status (1)

Country Link
JP (1) JPH03145554A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030030245A (en) * 2001-10-09 2003-04-18 현대자동차주식회사 Piston

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030030245A (en) * 2001-10-09 2003-04-18 현대자동차주식회사 Piston

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