JPS6220651Y2 - - Google Patents
Info
- Publication number
- JPS6220651Y2 JPS6220651Y2 JP3428882U JP3428882U JPS6220651Y2 JP S6220651 Y2 JPS6220651 Y2 JP S6220651Y2 JP 3428882 U JP3428882 U JP 3428882U JP 3428882 U JP3428882 U JP 3428882U JP S6220651 Y2 JPS6220651 Y2 JP S6220651Y2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder block
- light alloy
- bearing member
- block body
- oil passage
- 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.)
- Expired
Links
- 229910001234 light alloy Inorganic materials 0.000 claims description 27
- 230000001050 lubricating effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000003921 oil Substances 0.000 description 22
- 238000005461 lubrication Methods 0.000 description 5
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Sliding-Contact Bearings (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案はエンジンのシリンダブロツクの構造に
関し、とくに軽合金製のシリンダブロツクにおけ
るメインジヤーナル部潤滑用のオイル通路形成部
分の改良に関するものである。[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to the structure of an engine cylinder block, and particularly relates to an improvement in the oil passage forming portion for lubricating the main journal in a light alloy cylinder block.
（従来技術）
最近、エンジンのシリンダブロツクを軽量化す
るため、該シリンダブロツクをアルミニウム等の
軽合金で形成する構造が開発されている。ただ
し、この場合も、クランク軸に対する軸受部分に
は、剛性および真円度等が要求される。そこで、
実開昭53−41508号公報に見られるように、シリ
ンダブロツク本体には軽合金を用い、軸受部材に
は剛性が高くてクランク軸とほぼ同じ熱膨張率を
有する鋳鉄を用い、該軸受部材をシリンダブロツ
ク本体に鋳ぐるんだ構造が知られている。ところ
で、従来のこの種構造においては、メインジヤー
ナル部潤滑用のオイル通路が、単に上記軸受部材
とシリンダブロツク本体との対応箇所に連通形成
されていた。このため、軸受部材とシリンダブロ
ツク本体との境界部分で両者の熱膨張率の差やひ
ずみにより隙間が生じ、この隙間に上記オイル通
路からオイルが洩れ、これによつてオイル圧力が
低下し、潤滑不良を起こすという問題があつた。(Prior Art) Recently, in order to reduce the weight of an engine cylinder block, a structure in which the cylinder block is made of a light alloy such as aluminum has been developed. However, even in this case, rigidity, roundness, etc. are required of the bearing portion for the crankshaft. Therefore,
As seen in Japanese Utility Model Application No. 53-41508, the cylinder block body is made of a light alloy, and the bearing member is made of cast iron, which has high rigidity and has approximately the same coefficient of thermal expansion as the crankshaft. A structure in which the cylinder block is cast into the main body is known. By the way, in this type of conventional structure, the oil passage for lubricating the main journal was simply formed in communication with the corresponding location between the bearing member and the cylinder block body. For this reason, a gap is created at the boundary between the bearing member and the cylinder block body due to the difference in coefficient of thermal expansion and strain between the two, and oil leaks from the oil passage into this gap, resulting in a decrease in oil pressure and lubrication. There was a problem with it causing defects.
（考案の目的）
本考案は上記の事情に鑑み、軽合金製のシリン
ダブロツクにおいて、シリンダブロツク本体と鋳
鉄製等の軸受部材との境界部分におけるオイル洩
れを確実に防止し、良好な潤滑状態を維持するこ
とのできるエンジンのシリンダブロツク構造を提
供せんとするものである。(Purpose of the invention) In view of the above-mentioned circumstances, the present invention reliably prevents oil leakage at the boundary between the cylinder block body and the bearing member made of cast iron, etc. in a light alloy cylinder block, and maintains a good lubrication state. It is an object of the present invention to provide an engine cylinder block structure that can be maintained.
（考案の構成）
本考案は、軽合金製のシリンダブロツク本体
と、軽合金より剛性が高くクランク軸とほぼ同じ
熱膨張率を有する素材により形成された軸受部材
とを備え、該軸受部材に貫通孔が形成され、シリ
ンダブロツク本体の一部をなす軽合金部が該貫通
孔を埋めるように、上記軸受部材がシリンダブロ
ツク本体におけるメインジヤーナル部上部のクラ
ンク軸支持部に鋳ぐるまれ、上記貫通孔を埋めた
軽合金部に、メインジヤーナル部潤滑用のオイル
通路が、その周囲に軽合金部を残して穿設されて
なるものである。(Structure of the invention) The present invention includes a cylinder block body made of a light alloy, and a bearing member made of a material that is more rigid than the light alloy and has approximately the same coefficient of thermal expansion as the crankshaft, and has a cylinder block body made of a light alloy. A hole is formed, and the bearing member is cast into the crankshaft support part at the upper part of the main journal part of the cylinder block body so that the light alloy part forming a part of the cylinder block body fills the through hole. An oil passage for lubricating the main journal is bored in the light alloy part filled with the light alloy part, leaving the light alloy part around it.
この構成により、オイル通路が、シリンダブロ
ツク本体を構成する軽合金製の部分と軸受部材と
の境界部分を通ることなく軸受部材の内周部に至
り、このため上記境界部分へのオイル洩れを防止
する作用が得られる。 With this configuration, the oil passage reaches the inner circumference of the bearing member without passing through the boundary between the light alloy part that makes up the cylinder block body and the bearing member, thus preventing oil leakage into the boundary area. This effect can be obtained.
（実施例）
以下、本考案の実施例を図面によつて説明す
る。(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.
１はシリンダブロツク本体で、所要数のシリン
ダ孔２…、冷却水ジヤケツト３、メインオイルギ
ヤラリー４等を有し、下方部は断面スカート状に
形成され、かつ、その内部の適宜数箇所にクラン
ク軸支持部５を連成している。このシリンダブロ
ツク本体１は、軽合金たとえばアルミニウムのダ
イカストによつて成形されている。また、６は軸
受部材で、半円筒状部６ａと、その両側の鍔部６
ｂとを有し、メインジヤーナル部下部側のキヤツ
プ７とともに、クランク軸８に対する軸受を構成
するものである。この軸受部材６は、軽合金より
剛性が高く、かつ、クランク軸８とほぼ同じ熱膨
張率を有する素材たとえば鋳鉄により形成され、
シリンダブロツク本体１におけるメインジヤーナ
ル部上部の上記クランク軸支持部５に、一体に鋳
ぐるまれている。 Reference numeral 1 denotes a cylinder block main body, which has a required number of cylinder holes 2, a cooling water jacket 3, a main oil gear rally 4, etc., and its lower part is formed into a skirt shape in cross section, and a crankshaft is installed at appropriate locations inside the block. The support part 5 is connected. The cylinder block body 1 is die-cast from a light alloy such as aluminum. Further, 6 is a bearing member, which includes a semi-cylindrical portion 6a and flanges 6 on both sides of the semi-cylindrical portion 6a.
b, and together with the cap 7 on the lower side of the main journal portion constitute a bearing for the crankshaft 8. The bearing member 6 is made of a material, such as cast iron, which is more rigid than a light alloy and has approximately the same coefficient of thermal expansion as the crankshaft 8.
It is integrally cast into the crankshaft support portion 5 above the main journal portion of the cylinder block body 1.
上記軸受部材６の半円筒状部６ａの所定箇所に
は貫通孔９が形成され、該貫通孔９はシリンダブ
ロツク本体１から突出した軽合金部１０で埋めら
れ、この軽合金部１０に、前記メインオイルギラ
ラリー４に連通するメインジヤーナル部潤滑用の
オイル通路１１が形成されている。該オイル通路
１１は上記貫通孔９より小径に形成され、貫通孔
９の内部においてオイル通路１１の周囲に軽合金
部１０がパイプ状に残されている。 A through hole 9 is formed at a predetermined location in the semi-cylindrical portion 6a of the bearing member 6, and the through hole 9 is filled with a light alloy portion 10 protruding from the cylinder block body 1. An oil passage 11 for lubricating the main journal portion is formed which communicates with the main oil gallery 4. The oil passage 11 is formed to have a smaller diameter than the through hole 9, and a light alloy portion 10 is left in the shape of a pipe around the oil passage 11 inside the through hole 9.
つまり、製造にあたつては、上記軸受部材６
に、予め、オイル通路に必要な径よりも大径の貫
通孔９を設けておき、シリンダブロツク本体１を
ダイカストにより成形する際にこの軸受部材６を
鋳ぐるむことにより、上記貫通孔９に、シリンダ
ブロツク本体１の一部である軽合金部１０が埋ま
り込むようにする。然る後、この軽合金部１０
に、きり加工等によりオイル通路１１を形成すれ
ばよい。 In other words, during manufacturing, the bearing member 6
A through hole 9 with a diameter larger than that required for the oil passage is provided in advance, and when the cylinder block body 1 is formed by die casting, the bearing member 6 is cast into the through hole 9. , so that the light alloy part 10, which is a part of the cylinder block body 1, is embedded. After that, this light alloy part 10
Then, the oil passage 11 may be formed by drilling or the like.
なお、１２は軸受部材６の鍔部６ｂに設けたボ
ルト挿通孔、１３はシリンダブロツク本体１のク
ランク軸支持部５における上記ボルト挿通孔１２
に対応する位置に設けたねじ孔で、これらは前記
キヤツプ７をボルト締結するためのものである。 Note that 12 is a bolt insertion hole provided in the flange 6b of the bearing member 6, and 13 is the bolt insertion hole 12 in the crankshaft support portion 5 of the cylinder block body 1.
These screw holes are provided at positions corresponding to the caps 7 and 7, and these are for fastening the cap 7 with bolts.
このシリンダブロツクの構造においては、前記
オイル通路１１が、軸受部材６を貫通部分におい
ても、シリンダブロツク本体１の一部をなす軽合
金部１０で囲撓される。すなわち、該オイル通路
１１は、別種の素材で形成されたシリンダブロツ
ク本体１と軸受部材６との境界部分を通ることな
く、シリンダブロツク本体１を構成する軽合金製
の部分のみを通つて軸受部材６の内周部に開口す
る。そして、このオイル通路１１によりメインジ
ヤーナル部に潤滑用のオイルが供給されることと
なる。 In this cylinder block structure, the oil passage 11 is surrounded by a light alloy portion 10 forming a part of the cylinder block body 1 even at the portion where the oil passage 11 passes through the bearing member 6. That is, the oil passage 11 does not pass through the boundary between the cylinder block body 1 and the bearing member 6, which are made of different materials, but passes only through the light alloy part that constitutes the cylinder block body 1, and connects the bearing member to the bearing member. It opens at the inner circumference of 6. Lubricating oil is supplied to the main journal portion through this oil passage 11.
（考案の効果）
以上のように構成された本考案のシリンダブロ
ツクの構造によると、軽量化のためシリンダブロ
ツク本体と軸受部材とに別種の素材を用いるもの
でありながら、メインジヤーナル潤滑用のオイル
通路がシリンダブロツク本体を構成する軽合金製
の部分のみを通るようにしてあるため、シリンダ
ブロツク本体と軸受部材との間に潤滑用オイルが
洩れることを確実に防止し得、良好な潤滑状態を
維持することができるものである。(Effects of the invention) According to the structure of the cylinder block of the present invention constructed as described above, although different materials are used for the cylinder block body and the bearing member in order to reduce weight, oil for main journal lubrication is used. Since the passage passes only through the light alloy parts that make up the cylinder block body, it is possible to reliably prevent lubricating oil from leaking between the cylinder block body and the bearing member, ensuring a good lubrication condition. It is something that can be maintained.
図は本考案のシリンダブロツクの構造の実施例
を示す要部の断面図である。
１……シリンダブロツク本体、５……クランク
軸支持部、６……軸受部材、９……貫通孔、１０
……貫通孔内の軽合金部、１１……メインジヤー
ナル潤滑用のオイル通路。
The figure is a sectional view of essential parts showing an embodiment of the structure of the cylinder block of the present invention. DESCRIPTION OF SYMBOLS 1... Cylinder block body, 5... Crankshaft support part, 6... Bearing member, 9... Through hole, 10
... Light alloy part in the through hole, 11 ... Oil passage for main journal lubrication.
Claims (1)
り剛性が高くクランク軸とほぼ同じ熱膨張率を有
する素材により形成された軸受部材とを備え、該
軸受部材に貫通孔が形成され、シリンダブロツク
本体の一部をなす軽合金部が該貫通孔を埋めるよ
うに、上記軸受部材がシリンダブロツク本体にお
けるメインジヤーナル部上部のクランク軸支持部
に鋳ぐるまれ、上記貫通孔を埋めた軽合金部に、
メインジヤーナル部潤滑用のオイル通路が、その
周囲に軽合金部を残して穿設されてなることを特
徴とするエンジンのシリンダブロツク構造。 The cylinder block body is made of a light alloy, and the bearing member is made of a material that is more rigid than the light alloy and has approximately the same coefficient of thermal expansion as the crankshaft. The bearing member is cast into the crankshaft support part above the main journal part of the cylinder block body so that the light alloy part filling the through hole fills the light alloy part that fills the through hole.
An engine cylinder block structure characterized in that an oil passage for lubricating the main journal is bored leaving a light alloy part around it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3428882U JPS58136609U (en) | 1982-03-10 | 1982-03-10 | Engine cylinder block structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3428882U JPS58136609U (en) | 1982-03-10 | 1982-03-10 | Engine cylinder block structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58136609U JPS58136609U (en) | 1983-09-14 |
| JPS6220651Y2 true JPS6220651Y2 (en) | 1987-05-26 |
Family
ID=30045789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3428882U Granted JPS58136609U (en) | 1982-03-10 | 1982-03-10 | Engine cylinder block structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58136609U (en) |
-
1982
- 1982-03-10 JP JP3428882U patent/JPS58136609U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58136609U (en) | 1983-09-14 |
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