JPS61106950A - Thin integral type piston of internal-conbustion engine - Google Patents
Thin integral type piston of internal-conbustion engineInfo
- Publication number
- JPS61106950A JPS61106950A JP22994184A JP22994184A JPS61106950A JP S61106950 A JPS61106950 A JP S61106950A JP 22994184 A JP22994184 A JP 22994184A JP 22994184 A JP22994184 A JP 22994184A JP S61106950 A JPS61106950 A JP S61106950A
- Authority
- JP
- Japan
- Prior art keywords
- cooling oil
- piston
- pipe
- crown
- unit
- 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
Links
- 238000001816 cooling Methods 0.000 claims abstract description 44
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 11
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 241000257465 Echinoidea Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/16—Pistons having cooling means
- F02F3/20—Pistons having cooling means the means being a fluid flowing through or along piston
- F02F3/22—Pistons having cooling means the means being a fluid flowing through or along piston the fluid being liquid
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、ダクタイル鋳鉄等によりクラウン部とスカー
ト部を一体に成形する内燃機関の薄肉一体形ピストンに
関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a thin-walled integral piston for an internal combustion engine in which a crown portion and a skirt portion are integrally molded from ductile cast iron or the like.
（従来技術及びその問題点）
第６図に示すように冷却油洞８へ冷却油を導くだめの通
路として、ピストン軸心と平行（２きり孔２０が例えば
補強リブ５の部分に設ＧＪられ−Ｃいる。(Prior art and its problems) As shown in FIG. -C is here.
冷却油はクランクケース内の噴射ノズルから子方へ噴射
され、きり孔２０を通って冷７Ｊｌ油１ｌｉ１８内へ供
給される。Cooling oil is injected from an injection nozzle in the crankcase toward the bottom, and is supplied into the cold 7Jl oil 1li18 through the perforation 20.
ところが上記のようなＷＪ造では、製３ＴｈＩ程中にき
り孔加工工程が付加され、製造に手間がかかる。However, in the WJ construction as described above, a drilling process is added during the 3ThI manufacturing process, which takes time and effort.
また鋳物のばらつきにより、きり孔の周囲の肉厚が部分
的に薄くなる場合があり、そのために強度的に弱くなる
おそれがある。Furthermore, due to variations in casting, the wall thickness around the borehole may become thinner in some areas, which may weaken the strength.
なお上記のようなきり孔を廃止したビス］ヘンどして、
本願出願人が実開昭５／ｌ−２９２０９で示しているよ
うに単に冷却油導入管を使用しただけのものがある。し
かしながら冷却油を取入れ易くするような工夫やあるい
は導入管をピストンのひずみ等から保護するような工夫
は施されていない。In addition, with the above-mentioned screw that abolishes the hole,
As shown in Japanese Utility Model Application No. 5/1-29209 by the applicant of the present application, there is a system that simply uses a cooling oil introduction pipe. However, no measures have been taken to make it easier to take in the cooling oil or to protect the introduction pipe from distortion of the piston.
（発明の目的）
本発明の目的は、きり孔を廃止することにより製造の容
易化及びピストン強度の保□持を図ると共に、冷却油取
入れパイプの形状及び配置構造を■失することにＪ、す
、冷却油の取入れ効率の向上及びパイプの耐久性向上を
図っている。(Objective of the Invention) The object of the present invention is to facilitate manufacturing and maintain piston strength by eliminating the cut hole, and to eliminate the shape and arrangement structure of the cooling oil intake pipe. The aim is to improve the efficiency of cooling oil intake and the durability of the pipes.
（目的を達成するための手段）
１−開目的を達成するために本発明は、ピストン偵号ｉ
ｔの下面側に冷ｎ１油洞を形成し、冷却油側からビス］
・ン７端部へ延びる冷ＩＪ１油取入れパイプを、ビスｉ
・ンピンボス部どクラウン部を結ぶ補強リブを避ＧＪて
２ｔル支持構造でビス］・ン内に固定し、パイプ十、端
部を冷ｕ１油洞内に上向きに突出さ氾、パイプの下端入
口部を下聞きテーパー状に広く形成し°Ｃいる。(Means for achieving the objective) 1-In order to achieve the objective, the present invention provides a piston reconnaissance i
Form a cold n1 oil cavity on the lower surface side of t, and screw from the cooling oil side]
・Connect the cold IJ1 oil intake pipe that extends to the end of engine 7 with screw i.
・Avoid the reinforcing rib connecting the crown part of the pin boss part and fix it in the 2-ton support structure with screws, and then protrude the end of the pipe upward into the cold U1 oil cavity. The part is formed into a wide tapered shape.
（実施例）
本発明を適用したピストンの縦断面図を示す第１図にお
いて、クラウン部１とスカート部２はダクタイル鋳鉄に
より一体成形されている。スカート部２内にはビスｌ−
ンピンボス部３が設【ノられており、ボス部３の−１一
端部は上方へ延びる上部補強リブ５を介してクラウン部
１に連結しており、ビ！惰 ユ、＞ ＄１１１ ：
／ｊ ｌｉ’ｉｌお□６カ。４８ユ、１．３ｏ□、１□
□。(Example) In FIG. 1 showing a longitudinal cross-sectional view of a piston to which the present invention is applied, a crown portion 1 and a skirt portion 2 are integrally formed of ductile cast iron. There is a screw l- inside the skirt part 2.
A pin boss portion 3 is provided, and one end of the boss portion 3 is connected to the crown portion 1 via an upper reinforcing rib 5 extending upward. Yu, > $111:
/j li'il o□6ka. 48yu, 1.3o□, 1□
□.
部補強リブ６を介してスカート部２の内周壁に連結して
いる。ビス１〜ン頂壁７の下面側には概ね環状の冷却油
側８が設置ノられている。The skirt portion 2 is connected to the inner peripheral wall of the skirt portion 2 via a reinforcing rib 6. A generally annular cooling oil side 8 is installed on the lower surface side of the top wall 7 of the screws 1 to 7.
冷却油取入れパイプ１０は冷ＩＪＩ油側８からピストン
軸心と平行にビス１〜ン下端部分まで延び（いる。パイ
プ１０の上端部１０ａは先細り状に細くなると共に冷却
油側８の下壁８ ａ 、Ｌりも上方へ突出しており、パ
イプ１０の下端入口部１０ｂは下開きテーパー状に広く
形成されている。パイプ入口部１０ｂは、例えばクラン
クケースの冷却油噴射ノズルに向かって聞［１している
。The cooling oil intake pipe 10 extends from the cold IJI oil side 8 parallel to the piston axis to the lower end of the screws 1 to 1. a, L also protrudes upward, and the lower end inlet portion 10b of the pipe 10 is formed in a wide, downwardly tapered shape. are doing.
パイプ１０は冷却油側８の下壁８ａと側部補強リブ６に
より上下２点支持構造で支持されており、パイプ１０の
中間部分は上部補強リブ５を避（Ｊて露出している。ま
たパイプ１０は打込みあるいは鋳込みにより、下壁８ａ
及び側部補強リブ６に埋め込まれている。The pipe 10 is supported by the lower wall 8a of the cooling oil side 8 and the side reinforcing ribs 6 in a two-point support structure, upper and lower, and the middle part of the pipe 10 avoids the upper reinforcing rib 5 and is exposed. The pipe 10 is attached to the lower wall 8a by driving or casting.
and embedded in the side reinforcing ribs 6.
１１は下壁８ａに設けられた冷却油出口孔であって、そ
の下側部分には出［１金具１２が同名されている。11 is a cooling oil outlet hole provided in the lower wall 8a, and a metal fitting 12 with the same name is provided in the lower part thereof.
第２、第３図はそれぞれ第１図のＴＩ −ＩＴ、■−■
断面を示しており、パイプ１０の形成位置を明確にして
いる。出］二１孔１１はパイプ１０から離れた位置に設
番ノられている。Figures 2 and 3 are TI-IT and ■-■ of Figure 1, respectively.
A cross section is shown to clarify the formation position of the pipe 10. The second hole 11 is located at a position apart from the pipe 10.
（作用）
下／Ｊの冷却油噴射ノズルから上方に噴射される冷７Ｊ
Ｉ油は、パイプ１０の下端入口部１０ｂからパイプ１０
内に入り、パイプ１０内を通過して冷却油側８内に供給
される。ピストンの往復運動にＪ：り冷７ＪＩ油洞８内
でシ１イキングされ、それにより頂壁７を冷却する。冷
７Ｊ１後の冷却油は出口孔１１から放出される。(Function) Cold 7J is injected upward from the cooling oil injection nozzle at bottom/J.
I oil is supplied to the pipe 10 from the lower end inlet portion 10b of the pipe 10.
It passes through the pipe 10 and is fed into the cooling oil side 8 . Due to the reciprocating motion of the piston, the oil is swept in the oil cavity 8, thereby cooling the top wall 7. The cooling oil after cooling 7J1 is discharged from the outlet hole 11.
なおパイプ１０の下端入口部１０ｂは下開きテーパー状
に形成されているので、効率良く下からの冷却油を受入
れることができる。またパイプ上端部１０ａは冷却油側
下壁８ ａ にりも上方へ突出し、かつ先細り状に形成
されているので、シェイキング中、冷却油１１ｉｉＩ８
内の冷却油がパイプ１０に逆流Ｊるのを防１にすること
ができる。Note that since the lower end inlet portion 10b of the pipe 10 is formed in a downwardly-opening tapered shape, cooling oil can be efficiently received from below. In addition, since the upper end portion 10a of the pipe protrudes upward from the lower wall 8a on the cooling oil side and is formed in a tapered shape, during shaking, the cooling oil 11iiI8
It is possible to prevent the cooling oil inside from flowing back into the pipe 10.
（別の実施例）
（１）第４、第５図は折曲げたパイプ１０を利用した例
である。パイプ１０の上側部分は冷却油側下壁８ａに支
持されているが、下側部分は第５図に示すようにスカー
ト部２の内周面のボス部分１５に支持されている。その
他の構造は第１〜第３図のものと同様であり、第１〜第
３図のものど同じ部分には同じ番号を付している。(Another embodiment) (1) FIGS. 4 and 5 are examples in which a bent pipe 10 is used. The upper part of the pipe 10 is supported by the cooling oil side lower wall 8a, while the lower part is supported by a boss part 15 on the inner peripheral surface of the skirt part 2, as shown in FIG. The other structures are the same as those in FIGS. 1 to 3, and the same parts in FIGS. 1 to 3 are given the same numbers.
第４図のようにパイプ１０を折曲げることにより、下端
入口部１０ｂの位置に合口て冷却油噴射ノズルの位置の
選定を、］ネクティング１１ツドやバランスウェイト等
地の制約の中で容易にすることができる。By bending the pipe 10 as shown in Fig. 4, the location of the cooling oil injection nozzle can be easily selected within the constraints of the connecting 11, balance weight, etc. can do.
（発明の効果）
以上説明したように本発明は、クラウン部１どスカート
部２を一体に成形する薄肉一体形ビスＩ・ンにおいて：
（１）ピストン頂壁７の下面側に冷却油側８を形成し、
冷却油側８からピストン下端部へ延びる冷却油取入れパ
イプ１０をピストン内に固定しているので、きり孔加工
工程を削減でき、ピストンの製造が容易になる。(Effects of the Invention) As explained above, the present invention provides a thin integrated screw I/N in which the crown portion 1 and skirt portion 2 are integrally formed: (1) Cooling oil side 8 on the lower surface side of the piston top wall 7; form,
Since the cooling oil intake pipe 10 extending from the cooling oil side 8 to the lower end of the piston is fixed within the piston, the drilling process can be reduced and the piston can be manufactured easily.
（２）きり孔加Ｔを廃止できるので、従来のＪ：うにＵ
物のばらつきにＪ、りきり孔周囲に肉薄部が発生りる。(2) Since the perforation T can be abolished, the conventional J: Sea urchin U
Due to the unevenness of the material, thin parts occur around the drill holes.
１、う＜Ｋ不具合はなくなり、強度不星の不安がなくな
る。1. U<K problems will disappear, and there will be no need to worry about poor strength.
（３）冷却油取入れパイプ１０の支持構造を、ピストン
ピンボス部３とクラウン部１を結ぶ補強りＩ５を避【′
Ｊだ２点★持４Ｍ造どしているので、パイプ１０に対し
て、ピストン運動にＪ、る補強リブ５のひずみの影響は
殆んどなくなり、パイプ１０の耐久性が向」。Ｊる。(3) The support structure of the cooling oil intake pipe 10 is designed to avoid the reinforcement I5 connecting the piston pin boss part 3 and the crown part 1.
Since the pipe 10 is made with 2 points and 4M, the effect of strain on the reinforcing ribs 5 on the piston movement is almost eliminated, and the durability of the pipe 10 is improved. Jru.
（４）冷却油取入れパイプ１０の下端入口部１０ｂを下
開きのテーパー状に広く形成しているので、噴０・１ノ
ズルからの冷却油の取入れ効率が白土する。(4) Since the lower end inlet portion 10b of the cooling oil intake pipe 10 is formed in a wide tapered shape that opens downward, the efficiency of intake of cooling oil from the jet 0 and 1 nozzles is improved.
（５）冷ＪＪＩ油取入れパイプ１０の上端部を冷却油側
８内に十向きに突出さけているので、冷却油側８からパ
イプ１０への冷却油の逆流を防止できる。(5) Since the upper end of the cold JJI oil intake pipe 10 is made to protrude tenfold into the cooling oil side 8, backflow of cooling oil from the cooling oil side 8 to the pipe 10 can be prevented.
第１図【、１本発明を適用したピストンの縦断面図、第
２、第３図はそれぞれ第１図のＴ−１１、■−■断面図
、第４図は別の実施例の縦断面図、第５図は第４図のｖ
−■断面図、第６図は従来例の縦断面図である。１・・
・クラウン部、２・・・メカ−１一部、３・・・ピスト
ンピンボス部、５・・・補強リブ、８・・・冷却油側、
１０・・・冷却油取入れパイプ、１０ａ・・・下端入口
部Fig. 1 [, 1] A longitudinal cross-sectional view of a piston to which the present invention is applied; Figs. 2 and 3 are T-11 and ■-■ cross-sectional views of Fig. 1, respectively; Fig. 4 is a longitudinal cross-section of another embodiment. Figure 5 is the v of Figure 4.
-■ sectional view, and FIG. 6 is a longitudinal sectional view of a conventional example. 1...
・Crown part, 2... Part of mechanism 1, 3... Piston pin boss part, 5... Reinforcement rib, 8... Cooling oil side,
10...Cooling oil intake pipe, 10a...Lower end inlet part
Claims (1)
ストンにおいて、ピストン頂壁の下面側に冷却油洞を形
成し、冷却油洞からピストン下端部へ延びる冷却油取入
れパイプを、ピストンピンボス部とクラウン部を結ぶ補
強リブを避けて２点支持構造でピストン内に固定し、パ
イプ上端部を冷却油洞内に上向きに突出させ、パイプの
下端入口部を下開きテーパー状に広く形成したことを特
徴とする内燃機関の薄肉一体形ピストン。In a thin-walled integral piston in which the crown and skirt parts are integrally molded, a cooling oil cavity is formed on the lower surface side of the top wall of the piston, and a cooling oil intake pipe extending from the cooling oil cavity to the lower end of the piston is connected to the piston pin boss part and the crown. It is fixed inside the piston with a two-point support structure, avoiding the reinforcing ribs that connect the parts, the upper end of the pipe protrudes upward into the cooling oil cavity, and the lower end of the pipe is wide and tapered to open downward. A thin-walled one-piece piston for internal combustion engines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22994184A JPS61106950A (en) | 1984-10-30 | 1984-10-30 | Thin integral type piston of internal-conbustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22994184A JPS61106950A (en) | 1984-10-30 | 1984-10-30 | Thin integral type piston of internal-conbustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61106950A true JPS61106950A (en) | 1986-05-24 |
Family
ID=16900115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22994184A Pending JPS61106950A (en) | 1984-10-30 | 1984-10-30 | Thin integral type piston of internal-conbustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61106950A (en) |
-
1984
- 1984-10-30 JP JP22994184A patent/JPS61106950A/en active Pending
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