JPH108931A - Oil passage forming method for engine - Google Patents
Oil passage forming method for engineInfo
- Publication number
- JPH108931A JPH108931A JP16626596A JP16626596A JPH108931A JP H108931 A JPH108931 A JP H108931A JP 16626596 A JP16626596 A JP 16626596A JP 16626596 A JP16626596 A JP 16626596A JP H108931 A JPH108931 A JP H108931A
- Authority
- JP
- Japan
- Prior art keywords
- oil passage
- pipe member
- casting
- engine
- cast
- 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
Landscapes
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、エンジンを構成す
る鋳造部材の内部にオイル通路を形成するためのエンジ
ンのオイル通路形成方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming an oil passage in an engine for forming an oil passage inside a casting member constituting the engine.
【０００２】[0002]
【従来の技術】自動二輪車や自動車のエンジンの内部に
は数本のオイル通路が形成されている。これらのオイル
通路は、エンジンに設けられたオイルポンプと、エンジ
ン内部の各軸受および摺動部との間を結ぶように形成さ
れており、オイルポンプから吐出される潤滑オイルがオ
イル通路を通って各軸受および摺動部に供給される。2. Description of the Related Art Several oil passages are formed inside a motorcycle or an automobile engine. These oil passages are formed so as to connect between an oil pump provided in the engine and bearings and sliding parts inside the engine, and lubricating oil discharged from the oil pump passes through the oil passage. It is supplied to each bearing and sliding part.
【０００３】従来、オイル通路の形成方法としては、ク
ランクケースやシリンダブロック等の鋳造部材を鋳造す
る際に細い中子を用いてオイル通路を同時に鋳抜く方法
と、鋳造部材の鋳造後にドリル加工等の切削加工によっ
てオイル通路を形成する方法とがあった。Conventionally, there are two methods of forming an oil passage: a method of simultaneously casting out an oil passage using a thin core when casting a cast member such as a crankcase or a cylinder block, and a method of drilling after casting the cast member. A method of forming an oil passage by cutting.
【０００４】ところが、オイル通路を鋳抜きにより形成
する方法は、中子の径をあまり細くすることができない
ので細いオイル通路を形成しにくい上に、屈折したオイ
ル通路の形成も不可能である。However, in the method in which the oil passage is formed by casting, the diameter of the core cannot be made very small, so that it is difficult to form a thin oil passage, and it is also impossible to form a bent oil passage.
【０００５】また、切削加工によってオイル通路を形成
する方法も、細長い孔の加工が困難なためエンジンの量
産性に難が生じ、しかも屈折したオイル通路を形成する
には２方向からドリルで切削した後に少なくとも一方の
通路の端部をメクラ蓋やボルト等の栓部材で閉塞すると
いう面倒な構成が必要があるため、エンジンの製造コス
トを大幅に増大させてしまう。[0005] In the method of forming an oil passage by cutting, it is difficult to form a long and narrow hole, which makes mass production of the engine difficult. Further, in order to form a bent oil passage, cutting is performed by drilling from two directions. Since it is necessary to provide a troublesome configuration for closing at least one end of the passage with a plug member such as a cover or a bolt, the manufacturing cost of the engine is greatly increased.
【０００６】そこで、例えば実開昭64-44308号公報に開
示されているように、シリンダブロック等の鋳造部材の
鋳造時に中空のパイプ部材を鋳込み、このパイプ部材の
中空をそのままオイル通路として用いる方法がある。Therefore, as disclosed in, for example, Japanese Utility Model Laid-Open Publication No. 64-44308, a method of casting a hollow pipe member at the time of casting a casting member such as a cylinder block and using the hollow of this pipe member as an oil passage as it is. There is.
【０００７】この方法によれば、困難なドリル加工等の
切削加工に頼ることなく容易にオイル通路を形成するこ
とができ、しかもメクラ蓋やボルト等の栓部材を一切用
いることなく屈折した形状のオイル通路を形成すること
ができる。[0007] According to this method, the oil passage can be easily formed without resorting to difficult cutting such as drilling, and the bent shape can be obtained without using any plug member such as a cover or a bolt. An oil passage can be formed.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、このよ
うに中空のパイプ部材を鋳込んでオイル通路を形成する
場合、鋳造時に溶融材料がパイプ部材の中空に浸入して
オイル通路を閉塞させてしまう懸念がある。However, when an oil passage is formed by casting a hollow pipe member as described above, there is a concern that a molten material may enter the hollow of the pipe member and block the oil passage during casting. There is.
【０００９】本発明は、この問題点を解決するためにな
されたもので、エンジンを構成する鋳造部材の鋳造時に
中空のパイプ部材を鋳込んでオイル通路を形成する際、
溶融材料がパイプ部材の中空部に浸入する懸念を排除
し、容易にオイル通路を形成することのできるエンジン
のオイル通路形成方法を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve this problem. When casting a hollow pipe member at the time of casting a casting member constituting an engine to form an oil passage,
An object of the present invention is to provide a method for forming an oil passage in an engine, which eliminates a concern that a molten material enters a hollow portion of a pipe member and can easily form an oil passage.
【００１０】[0010]
【課題を解決するための手段】上記目的を達成するた
め、本発明に係るエンジンのオイル通路形成方法は、請
求項１に記載したように、両端部を閉塞したパイプ部材
をエンジンの鋳造部材の鋳造型内に予め設置し、このパ
イプ部材の中空部の両端が鋳造部材の鋳造後の切削加工
面よりも外方に突出するようにパイプ部材の長さを設定
し、鋳造部材の鋳造後の切削加工時にパイプ部材の両端
部を切削加工により削り落としてパイプ部材の中空部を
外部に連通させ、この中空部をオイル通路とすることを
特徴とする。In order to achieve the above object, an oil passage forming method for an engine according to the present invention is characterized in that a pipe member having both ends closed is formed of a cast member of an engine. Pre-installed in the casting mold, the length of the pipe member is set such that both ends of the hollow portion of the pipe member protrude outward from the post-cast cutting surface of the cast member, At the time of cutting, both ends of the pipe member are cut off by cutting, and the hollow portion of the pipe member communicates with the outside, and this hollow portion is used as an oil passage.
【００１１】このようなエンジンのオイル通路形成方法
を採れば、両端部が閉塞されたパイプ部材により、鋳造
部材の鋳造時に溶融材料がパイプ部材の中空部に浸入す
ることが防止され、鋳造部材の鋳造後の切削加工を行う
と同時にパイプ部材の両端部が削り落とされてパイプ部
材の中空部がそのままオイル通路になるため、オイル通
路を非常に容易に形成することができる。According to such an oil passage forming method for an engine, the molten material is prevented from entering the hollow portion of the pipe member at the time of casting of the cast member by the pipe member whose both ends are closed, so that the cast member is formed. Since the both ends of the pipe member are cut off at the same time as the cutting after the casting, and the hollow portion of the pipe member becomes the oil passage as it is, the oil passage can be formed very easily.
【００１２】[0012]
【発明の実施の形態】以下、本発明の一実施形態を図面
に基づいて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.
【００１３】図１は、本発明に係るオイル通路形成方法
が採用されたエンジンの左側面図である。このエンジン
１は、例えば自動二輪車用の単気筒４サイクル形式のエ
ンジンであり、図１中の左側が前方となっている。FIG. 1 is a left side view of an engine employing the oil passage forming method according to the present invention. The engine 1 is a single-cylinder four-cycle engine for a motorcycle, for example, and the left side in FIG.
【００１４】エンジン１は、クランクケース２の上にシ
リンダブロック３とシリンダヘッド４とヘッドカバー５
が順に載置されて互いに固定された構成となっている。
クランクケース２は、例えば左右に２分割される構造で
あり、左右のケース半身２Ｌ，２Ｒにそれぞれ軸受６，
７，８が設けられ、これらの軸受６，７，８にクランク
軸９とカウンタ軸10とドライブ軸11が回転自在に軸支さ
れている。The engine 1 has a cylinder block 3, a cylinder head 4, and a head cover 5 on a crankcase 2.
Are sequentially placed and fixed to each other.
The crankcase 2 is, for example, divided into two parts, left and right, and bearings 6 and 6 are provided on the left and right case halves 2L and 2R, respectively.
A crankshaft 9, a countershaft 10, and a drive shaft 11 are rotatably supported by these bearings 6, 7, and 8.
【００１５】クランク軸９とカウンタ軸10の間には図示
しない一次減速ギヤが設けられ、カウンタ軸10とドライ
ブ軸11の間には常時噛合式の多段ギヤからなる変速装置
が組み込まれている。この他、クランクケース２内には
発電用のジェネレータや振動緩和用のバランサ軸、潤滑
用のオイルポンプ等が収納される。A primary reduction gear (not shown) is provided between the crankshaft 9 and the counter shaft 10, and a transmission including a constant mesh multi-stage gear is incorporated between the counter shaft 10 and the drive shaft 11. In addition, a generator for power generation, a balancer shaft for vibration reduction, an oil pump for lubrication, and the like are housed in the crankcase 2.
【００１６】ところで、図２にも示すように、例えばク
ランクケース２の左側の左ケース半身２Ｌにはオイル通
路13が形成されている。このオイル通路13は、左ケース
半身２Ｌの天井壁14内を左方へ水平に延びた後、直角に
屈折して左側壁15内を鉛直下に延び、ドライブ軸11の左
端側を支持する軸受８に繋がる形状とされている。オイ
ル通路13の末端部は軸受８とオイルシール16との間に開
口しており、オイルポンプから吐出される潤滑オイルが
軸受８内を経てクランクケース２内に流れ込むようにな
っている。As shown in FIG. 2, an oil passage 13 is formed in the left case half 2L on the left side of the crankcase 2, for example. The oil passage 13 extends leftward in the ceiling wall 14 of the left case half 2L horizontally, then refracts at a right angle and extends vertically downward in the left side wall 15 to support the left end side of the drive shaft 11. 8. The end of the oil passage 13 is opened between the bearing 8 and the oil seal 16 so that the lubricating oil discharged from the oil pump flows into the crankcase 2 through the inside of the bearing 8.
【００１７】クランクケース２は鋳造部材であり、オイ
ル通路13は左ケース半身２Ｌの鋳造時に同時に形成され
る。その形成方法は以下の通りである。The crankcase 2 is a cast member, and the oil passage 13 is formed simultaneously with the casting of the left case half 2L. The forming method is as follows.
【００１８】まず、オイル通路13の形状に合わせて直角
に屈折加工したパイプ部材18を用意する。このパイプ部
材18の材質は、左ケース半身２Ｌが鋳造される際に溶融
材料の温度によって溶けたり変形したりする懸念のない
ものを選定する。例えば左ケース半身２Ｌがアルミ合金
製である場合には、パイプ部材18をスチール製とする。First, a pipe member 18 bent at a right angle in accordance with the shape of the oil passage 13 is prepared. The material of the pipe member 18 is selected so as not to be melted or deformed by the temperature of the molten material when the left case half 2L is cast. For example, when the left case half 2L is made of an aluminum alloy, the pipe member 18 is made of steel.
【００１９】次に、このパイプ部材18の両端部18ａ，18
ｂを閉塞加工する（図３参照）。この閉塞加工は、両端
部18ａ，18ｂを潰すか、あるいは簡単な栓部材を両端部
18ａ，18ｂに圧入もしくは溶着することにより行う。そ
して、このように加工したパイプ部材18を左ケース半身
２Ｌの鋳造型内に予め設置した後、鋳造型内に溶融材料
を流し込んで左ケース半身２Ｌの鋳造を行う。Next, both ends 18a and 18a of the pipe member 18 will be described.
b is closed (see FIG. 3). This closing process is performed by crushing both ends 18a and 18b or by using a simple plug member at both ends.
This is performed by press-fitting or welding to 18a and 18b. After the pipe member 18 thus processed is previously set in a casting mold of the left case half 2L, the molten material is poured into the casting mold to cast the left case half 2L.
【００２０】図３は、鋳造後、かつ切削加工前における
左ケース半身２Ｌの縦断面図である。この図に示すよう
に、パイプ部材18の屈折部18ｃからの長さＬ１，Ｌ２
は、左ケース半身２Ｌの鋳造後にパイプ部材18の中空部
の両端が左ケース半身２Ｌの切削加工面Ａ，Ｂ，Ｃより
も外方へ充分に突出するように設定しておく必要があ
る。FIG. 3 is a longitudinal sectional view of the left case half 2L after casting and before cutting. As shown in this figure, the lengths L1 and L2 of the pipe member 18 from the bending portion 18c are shown.
It is necessary to set such that both ends of the hollow portion of the pipe member 18 after the casting of the left case half 2L are sufficiently protruded outward from the cut surfaces A, B, C of the left case half 2L.
【００２１】切削加工面Ａは、左ケース半身２Ｌに右ケ
ース半身２Ｒを密に接合するための接合面であり、平坦
面に加工される。また、切削加工面Ｂ，Ｃは、それぞれ
軸受８とオイルシール16の圧入面であり、円筒面に加工
される。なお、切削加工面Ｄは、ドライブ軸11に軸装さ
れる変速装置の軸方向の位置を決めるための平坦面であ
る。The cutting surface A is a joining surface for tightly joining the right case half 2R to the left case half 2L, and is machined into a flat surface. The cutting surfaces B and C are press-fit surfaces of the bearing 8 and the oil seal 16, respectively, and are formed into cylindrical surfaces. The cutting surface D is a flat surface for determining the position of the transmission mounted on the drive shaft 11 in the axial direction.
【００２２】左ケース半身２Ｌの鋳造が終了し、切削加
工面Ａ〜Ｄの切削加工が行われると、図４に示すように
左ケース半身２Ｌは切削加工面Ａ〜Ｄよりも外方の駄肉
が全て落とされた状態となる。そして、切削加工面Ａの
切削加工と同時にパイプ部材18の右側の端部18ａが削り
落とされ、切削加工面Ｂ，Ｃの切削加工と同時にパイプ
部材18の左側の端部18ｂが削り落とされる。このため、
パイプ部材18の中空部が外部に連通し、この中空部がそ
のままオイル通路13となる。When the casting of the left case half 2L is completed and the cutting surfaces A to D are cut, as shown in FIG. 4, the left case half 2L is located outside the cutting surfaces A to D. All the meat has been removed. Then, the right end 18a of the pipe member 18 is cut off simultaneously with the cutting of the cutting surface A, and the left end 18b of the pipe member 18 is cut off simultaneously with the cutting of the cutting surfaces B and C. For this reason,
The hollow portion of the pipe member 18 communicates with the outside, and this hollow portion becomes the oil passage 13 as it is.
【００２３】以上のように、本実施形態によれば、両端
部18ａ，18ｂを閉塞したパイプ部材18を左ケース半身２
Ｌの鋳造時に鋳込むことにより、鋳造時に溶融材料がパ
イプ部材18の中空部に浸入することが防止されるため、
非常に容易にオイル通路13を形成することができる。As described above, according to the present embodiment, the pipe member 18 whose both ends 18a, 18b are closed is connected to the left case half 2
By casting at the time of casting L, the molten material is prevented from entering the hollow portion of the pipe member 18 at the time of casting,
The oil passage 13 can be formed very easily.
【００２４】なお、本実施形態では、自動二輪車用エン
ジン１のクランクケース２（左ケース半身２Ｌ）にオイ
ル通路13を形成する例について説明したが、クランクケ
ース２に限らず、シリンダブロック３やシリンダヘッド
４にオイル通路を形成する場合にも本発明に係るオイル
通路形成方法を適用することができ、さらに自動二輪車
用のエンジンに限らず、自動車や他の車両のエンジンに
も本発明に係るオイル通路形成方法を幅広く適用するこ
とができる。In the present embodiment, an example in which the oil passage 13 is formed in the crankcase 2 (left case half 2L) of the motorcycle engine 1 has been described. The oil passage forming method according to the present invention can be applied to the case where an oil passage is formed in the head 4, and the oil according to the present invention is applied not only to an engine for a motorcycle but also to an engine of an automobile or another vehicle. The passage forming method can be widely applied.
【００２５】また、オイル通路のみならず、他の用途の
通路を形成する方法としても本発明の方法を適用するこ
とができる。さらに、エンジンに限らず、他の鋳造構造
物の内部に細い通路を形成する場合にも本発明の方法を
適用することができる。The method of the present invention can be applied to a method for forming not only an oil passage but also a passage for other uses. Further, the method of the present invention can be applied not only to an engine but also to a case where a narrow passage is formed inside another casting structure.
【００２６】[0026]
【発明の効果】以上説明したように、本発明に係るエン
ジンのオイル通路形成方法は、両端部を閉塞したパイプ
部材をエンジンの鋳造部材の鋳造型内に予め設置し、こ
のパイプ部材の中空部の両端が鋳造部材の鋳造後の切削
加工面よりも外方に突出するようにパイプ部材の長さを
設定し、鋳造部材の鋳造後の切削加工時にパイプ部材の
両端部を切削加工により削り落としてパイプ部材の中空
部を外部に連通させ、この中空部をオイル通路とするこ
とを特徴とする。As described above, according to the method for forming an oil passage of an engine according to the present invention, a pipe member having both ends closed is previously set in a casting mold of a casting member of an engine, and a hollow portion of the pipe member is formed. The length of the pipe member is set so that both ends of the cast member protrude outward from the cut surface of the cast member after casting, and both ends of the pipe member are cut off by cutting during cutting after casting of the cast member. The hollow portion of the pipe member communicates with the outside, and this hollow portion is used as an oil passage.
【００２７】このようなエンジンのオイル通路形成方法
を採れば、両端部が閉塞されたパイプ部材により、鋳造
部材の鋳造時に溶融材料がパイプ部材の中空部に浸入す
ることが防止され、鋳造部材の鋳造後の切削加工を行う
と同時にパイプ部材の両端部が削り落とされてパイプ部
材の中空部がそのままオイル通路になるため、オイル通
路を非常に容易に形成することができる。According to such an oil passage forming method for an engine, the pipe member whose both ends are closed prevents the molten material from entering the hollow portion of the pipe member at the time of casting the cast member. Since the both ends of the pipe member are cut off at the same time as the cutting after the casting, and the hollow portion of the pipe member becomes the oil passage as it is, the oil passage can be formed very easily.
【図１】本発明に係るオイル通路形成方法が採用された
エンジンの左側面図。FIG. 1 is a left side view of an engine employing an oil passage forming method according to the present invention.
【図２】図１の II-II線に沿う縦断面図。FIG. 2 is a longitudinal sectional view taken along the line II-II of FIG.
【図３】鋳造後、かつ切削加工前における左ケース半身
の縦断面図で、本発明の一実施形態を示す図。FIG. 3 is a longitudinal sectional view of a left case half body after casting and before cutting, showing an embodiment of the present invention.
【図４】切削加工後における左ケース半身の縦断面図。FIG. 4 is a longitudinal sectional view of a left case half body after cutting.
１ エンジン ２ クランクケース ２Ｌ エンジンの鋳造部材である左ケース半身 13 オイル通路 18 パイプ部材 18ａ，18ｂ パイプ部材の両端部 18ｃ パイプ部材の屈折部 Ａ，Ｂ，Ｃ 切削加工面 Ｌ１，Ｌ２ パイプ部材18の長さ DESCRIPTION OF SYMBOLS 1 Engine 2 Crankcase 2L Left case half body which is a cast member of engine 13 Oil passage 18 Pipe members 18a, 18b Both end portions of pipe member 18c Bend portions of pipe member A, B, C Cutting machined surface L1, L2 Pipe member 18 length
Claims (1)
18をエンジン１の鋳造部材（２Ｌ）の鋳造型内に予め設
置し、このパイプ部材18の中空部の両端が鋳造部材（２
Ｌ）の鋳造後の切削加工面Ａ，Ｂ，Ｃよりも外方に突出
するようにパイプ部材18の長さＬ１，Ｌ２を設定し、鋳
造部材（２Ｌ）の鋳造後の切削加工時にパイプ部材18の
両端部18ａ，18ｂを切削加工により削り落としてパイプ
部材18の中空部を外部に連通させ、この中空部をオイル
通路13とすることを特徴とするエンジンのオイル通路形
成方法。1. A pipe member having both ends 18a and 18b closed.
18 is previously set in a casting mold of a casting member (2L) of the engine 1, and both ends of a hollow portion of the pipe member 18 are cast members (2L).
L) The lengths L1 and L2 of the pipe member 18 are set so as to protrude outward from the cut surfaces A, B and C after casting of the cast member (L). A method of forming an oil passage for an engine, comprising cutting off both end portions (18a, 18b) of the pipe member (18) by cutting, and connecting the hollow portion of the pipe member (18) to the outside, and using the hollow portion as an oil passage (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16626596A JPH108931A (en) | 1996-06-26 | 1996-06-26 | Oil passage forming method for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16626596A JPH108931A (en) | 1996-06-26 | 1996-06-26 | Oil passage forming method for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH108931A true JPH108931A (en) | 1998-01-13 |
Family
ID=15828185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16626596A Pending JPH108931A (en) | 1996-06-26 | 1996-06-26 | Oil passage forming method for engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH108931A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010500501A (en) * | 2006-08-08 | 2010-01-07 | インターナショナル エンジン インテレクチュアル プロパティー カンパニー リミテッド ライアビリティ カンパニー | Intersection of fluid passage of engine and manufacturing method thereof |
| DE102013008863A1 (en) | 2012-05-24 | 2013-11-28 | Aisin Seiki Kabushiki Kaisha | Device main part, where casing elements to be cast are arranged in base material of maim part, protrude integrally and extend from outer side of main part, and fastening element for casing is provided on surface of device main part |
| JP2015059484A (en) * | 2013-09-18 | 2015-03-30 | マツダ株式会社 | Structure of cylinder head of engine and its manufacturing method |
| CN109699175A (en) * | 2017-08-22 | 2019-04-30 | 真边工业株式会社 | Hollow part and its manufacturing method |
-
1996
- 1996-06-26 JP JP16626596A patent/JPH108931A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010500501A (en) * | 2006-08-08 | 2010-01-07 | インターナショナル エンジン インテレクチュアル プロパティー カンパニー リミテッド ライアビリティ カンパニー | Intersection of fluid passage of engine and manufacturing method thereof |
| DE102013008863A1 (en) | 2012-05-24 | 2013-11-28 | Aisin Seiki Kabushiki Kaisha | Device main part, where casing elements to be cast are arranged in base material of maim part, protrude integrally and extend from outer side of main part, and fastening element for casing is provided on surface of device main part |
| JP2013244501A (en) * | 2012-05-24 | 2013-12-09 | Aisin Seiki Co Ltd | Device body having flow passage in one body, and method of manufacturing the device body |
| JP2015059484A (en) * | 2013-09-18 | 2015-03-30 | マツダ株式会社 | Structure of cylinder head of engine and its manufacturing method |
| CN109699175A (en) * | 2017-08-22 | 2019-04-30 | 真边工业株式会社 | Hollow part and its manufacturing method |
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