JP3429577B2 - Method for manufacturing assembled camshaft of internal combustion engine - Google Patents

Method for manufacturing assembled camshaft of internal combustion engine

Info

Publication number
JP3429577B2
JP3429577B2 JP26480194A JP26480194A JP3429577B2 JP 3429577 B2 JP3429577 B2 JP 3429577B2 JP 26480194 A JP26480194 A JP 26480194A JP 26480194 A JP26480194 A JP 26480194A JP 3429577 B2 JP3429577 B2 JP 3429577B2
Authority
JP
Japan
Prior art keywords
piece
camshaft
hole
internal combustion
combustion engine
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 - Fee Related
Application number
JP26480194A
Other languages
Japanese (ja)
Other versions
JPH08121119A (en
Inventor
隆雄 岸谷
修一 田牧
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.)
Nippon Piston Ring Co Ltd
Original Assignee
Nippon Piston Ring Co Ltd
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 Nippon Piston Ring Co Ltd filed Critical Nippon Piston Ring Co Ltd
Priority to JP26480194A priority Critical patent/JP3429577B2/en
Publication of JPH08121119A publication Critical patent/JPH08121119A/en
Application granted granted Critical
Publication of JP3429577B2 publication Critical patent/JP3429577B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Valve-Gear Or Valve Arrangements (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、ガソリンエンジン、デ
ィーゼルエンジン等の内燃機関に使用される組み立て式
と呼ばれるカムシャフトの製造方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a camshaft called a prefabricated type used in an internal combustion engine such as a gasoline engine or a diesel engine.

【0002】[0002]

【従来の技術】周知のように、ガソリンエンジン、ディ
ーゼルエンジン等の内燃機関においては、エンジンの主
軸(クランク軸)と連動するカムシャフトに取り付けら
れたカムにより、各シリンダの吸気、排気等のタイミン
グを制御している。カムシャフトの一例を図5に示す。
2. Description of the Related Art As is well known, in an internal combustion engine such as a gasoline engine or a diesel engine, a cam mounted on a cam shaft which works with a main shaft (crank shaft) of the engine causes a timing of intake and exhaust of each cylinder. Are in control. An example of the camshaft is shown in FIG.

【0003】図5は6気筒エンジンのカムシャフトで、
一端に取り付けられるギアにより、エンジンの主軸に連
動して回転する。1は金属管、2はエンジンの各シリン
ダa〜fに対応するカムピース、2aはカムシャフトの回
転を支持するジャーナルピース、2bはカムシャフトの軸
方向の位置決めおよびスラストを支持するスラストピー
ス、2cはオイルシールピース、2dは管端部を塞ぐエンド
ピースで、以下2、2a〜2dを金属管1に対して組み付け
部材と称し、カムピースの例で代表して説明する。
FIG. 5 shows a camshaft of a 6-cylinder engine.
A gear attached to one end rotates in conjunction with the main shaft of the engine. 1 is a metal tube, 2 is a cam piece corresponding to each cylinder a to f of the engine, 2a is a journal piece that supports rotation of the cam shaft, 2b is a thrust piece that supports axial positioning and thrust of the cam shaft, and 2c is The oil seal piece 2d is an end piece that closes the end of the pipe. Hereinafter, 2 and 2a to 2d are referred to as an assembly member for the metal pipe 1, and will be described as an example of a cam piece.

【0004】従来、カムシャフトは、一体で鍛造あるい
は鋳造により製造され、軸部分も中実構造であったが、
エンジンの軽量化、高速化などに伴い、中空の金属管に
カムその他の部材を取り付ける構造の「組み立て式カム
シャフト」が開発され、普及している。その一例とし
て、特開平5-10340号公報に記載されている金属管への
部材の取付方法を図6〜8により説明する。
Conventionally, the camshaft has been integrally manufactured by forging or casting, and the shaft portion has a solid structure.
Along with the reduction in weight and speed of engines, "assembled camshafts" having a structure in which cams and other members are attached to hollow metal pipes have been developed and are in widespread use. As an example thereof, a method of attaching a member to a metal tube disclosed in Japanese Patent Laid-Open No. 5-10340 will be described with reference to FIGS.

【0005】図6はシャフトの素材例を示す正面図で、
金属管1の所定箇所に、ローレット(旋盤等で、円筒状
のワークに押しつけて凹凸をつける工具)による膨出加
工で円周状あるいは螺旋状の***部14を形成している。
一方、図7は、この金属管1に組み付けられるカムピー
ス2の側面図である。カムピース2に設けられている取
り付け孔は、円弧面25a の数か所を弦面25bに置き換え
て形成されており、円弧面25a の直径は金属管1の***
部11のそれよりも大きく、弦面25b の面間距離は、***
部14の外径よりも小さいが金属管1の一般部の外径より
は大きいという関係にある。したがってカムピース2を
金属管1の***部14の位置まで圧入すると、弦面25b と
***部14の一方または両方が塑性変形することにより所
定位置に組み付けられるのである。圧入後の状態を図8
に示す。
FIG. 6 is a front view showing an example of the material of the shaft.
A circumferential or spiral ridge 14 is formed at a predetermined position of the metal tube 1 by bulging with a knurl (a tool that presses a cylindrical work with a lathe or the like to make unevenness).
On the other hand, FIG. 7 is a side view of the cam piece 2 assembled to the metal tube 1. The mounting hole provided in the cam piece 2 is formed by replacing the arc surface 25a at several places with the chord surface 25b. The diameter of the arc surface 25a is larger than that of the raised portion 11 of the metal tube 1, The surface distance between the surfaces 25b is smaller than the outer diameter of the raised portion 14 but larger than the outer diameter of the general portion of the metal tube 1. Therefore, when the cam piece 2 is press-fitted to the position of the raised portion 14 of the metal tube 1, one or both of the chord surface 25b and the raised portion 14 is plastically deformed, so that the cam piece 2 is assembled at a predetermined position. Figure 8 shows the state after press fitting
Shown in.

【0006】カムピース等、金属管1に取り付けられる
部材は、外側部分はたとえばカムの場合はフォロアとこ
ろがり接触し、ジャーナルの場合は軸受と嵌合あるいは
すべり接触するので、機械的強度や耐摩耗性、仕上がり
寸法の正確さ等が必要であるのに対して、軸に取り付け
られる内側部分は塑性変形し易い軟らかい材料とした方
が圧入が容易で、割れるおそれもないので好都合であ
る。そこで外側部分と内側部分とを材質の異なる別部材
で構成したものが特開平5-60203号公報に記載されてい
る。これを図9、10に示す。
A member such as a cam piece attached to the metal pipe 1 has an outer portion in a follower-to-point contact in the case of a cam, and a bearing or a sliding contact in the case of a journal, so that mechanical strength and wear resistance. In addition, it is preferable that the inner portion to be attached to the shaft is made of a soft material that is easily plastically deformed, because press-fitting is easy and there is no risk of cracking, while accuracy of the finished dimensions is required. Therefore, Japanese Patent Application Laid-Open No. 5-60203 discloses a structure in which the outer portion and the inner portion are made of different members made of different materials. This is shown in FIGS.

【0007】図9は、外側部分と内側部分とを材質の異
なる別部材で構成したカムピースの一例を示す側面図
で、カムピース2は軸に嵌合する内側部材のインナーピ
ース21と、カムプロフィルを規定する外側部材のアウタ
ーピース22とで構成され、インナーピース21は低炭素鋼
製、アウターピース22は焼結合金製で、両者は焼結炉に
おいて加熱され、拡散結合により一体化されている。こ
れを金属管1に嵌合した状態を図10に示す。
FIG. 9 is a side view showing an example of a cam piece in which the outer portion and the inner portion are made of different members made of different materials. The cam piece 2 includes an inner piece 21 of an inner member fitted to a shaft and a cam profile. The inner piece 21 is made of low carbon steel, and the outer piece 22 is made of a sintered alloy. Both are heated in a sintering furnace and integrated by diffusion bonding. FIG. 10 shows a state in which this is fitted to the metal tube 1.

【0008】ところで、カムピースの外周面は、前記し
たように通常カムフォロアと呼ばれる部材ところがり接
触あるいはすべり接触するので、接触面には潤滑が必要
である。組み立て式カムシャフトにおいてはカムシャフ
ト自体が金属管で中空であることを利用して、カムピー
スに内部の金属管内部まで到達する油孔を設け、金属管
内からこの油孔を経由してカムの外周面へ潤滑油を供給
することが行われている。
By the way, since the outer peripheral surface of the cam piece is in sliding contact or sliding contact with a member usually called a cam follower as described above, it is necessary to lubricate the contact surface. In the assembly type camshaft, by utilizing the fact that the camshaft itself is hollow with a metal tube, an oil hole reaching the inside of the metal tube inside is provided in the cam piece, and from the inside of the metal tube through the oil hole the outer circumference of the cam Lubricating oil is supplied to the surface.

【0009】しかし、前記したようにカムピースの取り
付け孔の形状、寸法は金属管の外径と同一ではないの
で、油孔のカムピースと金属管との接合部分から潤滑油
がしみ出たり漏れたりして外周面に必要量が到達せず、
潤滑が不十分になるおそれがあった。そこで、特開平5
-96409号公報には、金属管の油孔とカムピースの油孔と
を通して合成樹脂製または軟質金属製のパイプ材を圧入
することが記載されている。図11によりこれを説明す
る。
However, as described above, since the shape and size of the mounting hole of the cam piece are not the same as the outer diameter of the metal pipe, the lubricating oil exudes or leaks from the joint between the cam piece of the oil hole and the metal pipe. The required amount does not reach the outer peripheral surface,
There was a risk of insufficient lubrication. Therefore, JP-A-5
-96409 discloses that a pipe material made of a synthetic resin or a soft metal is press-fitted through an oil hole of a metal tube and an oil hole of a cam piece. This will be described with reference to FIG.

【0010】12は金属管1に加工された下孔、23はカム
ピース2に加工された下孔、33はこれらを挿通して圧入
されたパイプ材である。金属管1およびカムピース2に
それぞれ半径方向の下孔12、23を加工し、カムピース2
を組み付けた後、これらの下孔12、23を挿通して継ぎ目
のないパイプ材33を圧入するのである。なお、下孔12、
23の加工はそれぞれ事前に行ってもよいし、組み付け後
に通して加工してもよい。下孔を事前に加工した場合、
組み付け状態によって必ずしも下孔12、23の中心が一致
しないこともあるが、パイプ材33は合成樹脂または軟質
金属の柔軟な材質であるから、これらになじんで圧入さ
せることができる。パイプ材33が金属管1の中空部13か
ら組み付け部材2外周の摺動面まで継ぎ目なしに通って
いることにより、中間の隙間部分gにおける油の漏れは
なく、良好な潤滑を行うことができる。
Reference numeral 12 is a pilot hole machined in the metal tube 1, 23 is a pilot hole machined in the cam piece 2, and 33 is a pipe material inserted through these and press-fitted. The metal pipe 1 and the cam piece 2 are machined with radial pilot holes 12 and 23, respectively.
After assembling, the seamless pipe member 33 is press-fitted by inserting these pilot holes 12 and 23. The pilot hole 12,
Each of the processes of 23 may be performed in advance or may be processed after being assembled. When the pilot hole is processed in advance,
Although the centers of the lower holes 12 and 23 may not necessarily coincide with each other depending on the assembled state, since the pipe material 33 is a flexible material such as synthetic resin or soft metal, it can be fitted into them and press-fitted. Since the pipe material 33 passes seamlessly from the hollow portion 13 of the metal pipe 1 to the sliding surface of the outer periphery of the assembly member 2, there is no oil leakage in the intermediate gap portion g and good lubrication can be performed. .

【0011】しかし、この給油構造では、パイプ材33が
カムシャフトの回転により脱落したり、下孔とパイプ材
との隙間から油漏れするおそれがあるばかりでなく、下
孔加工にある程度の精度を要求されるためコスト高にな
るという問題点がある。
However, in this oil supply structure, not only is there a risk that the pipe material 33 will fall off due to the rotation of the camshaft, and oil will leak from the gap between the pilot hole and the pipe material, but some accuracy will be required for drilling the pilot hole. Since it is required, there is a problem that the cost becomes high.

【0012】[0012]

【発明が解決しようとする課題】本発明は、このような
問題点を解消し、低コストでしかも油漏れ等のおそれの
ないカムシャフトの製造方法を実現することを目的とす
る。
SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to realize a method of manufacturing a camshaft which is low in cost and has no fear of oil leakage.

【0013】[0013]

【課題を解決するための手段】請求項1に記載の本発明
は、金属管の外周面に***部を形成し、この***部の外
径よりもやや小さい内径部分を備えた円孔を有する組み
付け部材を、前記円孔を前記金属管の***部に圧入して
組み付けてなる内燃機関の組み立て式カムシャフトにお
いて、予め半径方向の下孔を加工した組み付け部材を金
属管に組み付けた後、その下孔内に樹脂材を充填して硬
化させてから、この樹脂材に、前記金属管まで貫通する
半径方向の油孔を加工することを特徴とする内燃機関の
組み立て式カムシャフトの製造方法である。
According to the present invention as set forth in claim 1, a raised portion is formed on the outer peripheral surface of a metal tube, and a circular hole having an inner diameter portion slightly smaller than the outer diameter of the raised portion is provided. In an assembling camshaft for an internal combustion engine in which the circular hole is press-fitted into the raised portion of the metal pipe to assemble the assembly member, the assembly member in which a radial pilot hole is previously machined is
After assembling the genus tube, the resin material from the cured filled into the lower hole of that, in the resin material, the internal combustion engine, characterized in that processing the radial oil hole penetrating to the metal tube Is a method for manufacturing a prefabricated camshaft.

【0014】請求項2に記載の本発明は、組み付け部材
が、***部の外径よりもやや小さい内径部分を備えた円
孔を有するインナーピースと、このインナーピースの外
側に接合されるアウターピースよりなり、前記インナー
ピースに形成する下孔の径前記アウターピースに形成
する下孔の径よりも大きくした請求項1に記載の内燃機
関の組み立て式カムシャフトの製造方法である。
According to a second aspect of the present invention, the assembly member has an inner piece having a circular hole having an inner diameter portion slightly smaller than the outer diameter of the raised portion, and an outer piece joined to the outer side of the inner piece. Consists of the inner
A method for producing a prefabricated camshaft of an internal combustion engine according to the size Kushida claim 1 than the diameter of the lower hole diameter of the lower hole is formed in the outer piece to form the piece.

【0015】[0015]

【0016】[0016]

【0017】[0017]

【作 用】本発明によれば、内燃機関の組み立て式カム
シャフトにおいて、取り付ける組み付け部材に半径方向
の下孔を加工し、この下孔内に樹脂材を充填して硬化さ
せてから、この樹脂材の中心付近に金属管まで貫通する
半径方向の油孔を加工するようにしたので、油孔の内面
および周辺に油漏れを生じる隙間がなく、組み付け部材
の外周面に確実な潤滑を行うことができるばかりでな
く、下孔や油孔の加工は厳しい精度を必要とせず、低コ
ストで加工でき、かつ樹脂材は隙間にも浸透して硬化し
ているため剥離したり脱落することもない。
[Operation] According to the present invention, in the assembly type camshaft of an internal combustion engine, a pre-hole in the radial direction is machined in the assembly member to be mounted, and the pre-hole is filled with a resin material and cured, and then the resin Since a radial oil hole that penetrates to the metal pipe is formed near the center of the material, there is no gap that causes oil leakage on the inner surface and the periphery of the oil hole, and reliable lubrication on the outer peripheral surface of the assembly member. In addition, it does not require strict precision to process the pilot hole or oil hole, it can be processed at low cost, and it does not peel off or fall off because the resin material penetrates into the gap and hardens. .

【0018】[0018]

【実施例】【Example】

実施例1 本発明の第1の実施例を図1〜図3に示す。図1はカム
シャフトを軸と直角方向に切断した断面図、図2はその
AA矢視による軸方向の部分断面図、図3はこの実施例
の加工手順を示す要部断面図で、1は金属管、13はその
中空部、2は組み付け部材の1例であるカムピースで、
21はそのインナーピース、22はアウターピース、31は樹
脂材、32は油孔である。
Example 1 A first example of the present invention is shown in FIGS. FIG. 1 is a cross-sectional view of the camshaft cut in a direction perpendicular to the axis, FIG. 2 is a partial cross-sectional view in the axial direction taken along the line AA, and FIG. 3 is a main-part cross-sectional view showing a processing procedure of this embodiment. A metal tube, 13 is its hollow portion, 2 is a cam piece which is an example of an assembly member,
Reference numeral 21 is the inner piece, 22 is the outer piece, 31 is a resin material, and 32 is an oil hole.

【0019】この実施例のカムシャフトは、図9に示し
たものと同様にカムピース2の内側部分と外側部分とを
別部材で構成した組み立て式カムシャフトで、インナー
ピース21、アウターピース22にはそれぞれ油孔を設ける
位置に下孔23、24が加工してある。予め下孔23、24を加
工したインナーピース21、アウターピース22を加熱して
一体化した後、金属管1の***部14に圧入して組み付け
る。この状態を図3(a)に示す。ここで特記すべき点
は、金属管1には下孔加工がなされておらず、またイン
ナーピース21とアウターピース22の下孔23と24とでは、
前者の方がやや径を大きくしてあることである。
The camshaft of this embodiment is an assembling type camshaft in which the inner part and the outer part of the cam piece 2 are formed by separate members like the one shown in FIG. Lower holes 23 and 24 are formed at the positions where the oil holes are provided, respectively. The inner piece 21 and the outer piece 22 in which the pilot holes 23 and 24 are processed in advance are heated and integrated, and then press-fitted into the raised portion 14 of the metal tube 1 to be assembled. This state is shown in FIG. The point to be noted here is that the metal tube 1 is not pre-drilled, and the inner piece 21 and the outer piece 22 have holes 23 and 24,
The former has a slightly larger diameter.

【0020】つぎに、図3(b)のように下孔23と24内
に樹脂材31を充填する。樹脂材31は、下孔23、24の形状
に従い、金属管1の表面や金属管1との隙間g内にもよ
く浸透して充填されるよう、流動性の高いものが好まし
く、硬化時間は短い方がよい。硬化後、下孔23、24の内
面によく接着していることも重要であり、充填前に下孔
内部の油汚れ等はよく清掃するとよい。樹脂の例として
はエポキシ配合樹脂、光硬化性樹脂、シリコン樹脂など
がある。
Next, as shown in FIG. 3 (b), the lower holes 23 and 24 are filled with the resin material 31. It is preferable that the resin material 31 has high fluidity so that the resin material 31 can permeate well into the surface of the metal tube 1 and the gap g between the metal tube 1 and be filled according to the shape of the pilot holes 23 and 24. The shorter the better. After hardening, it is also important that the inner surfaces of the pilot holes 23, 24 are well adhered, and oil stains and the like inside the pilot holes should be thoroughly cleaned before filling. Examples of the resin include epoxy compound resin, photocurable resin, and silicone resin.

【0021】樹脂材31の硬化後、図3(c)のように、
樹脂材31の中心付近に、金属管1まで貫通する半径方向
の油孔32を加工する。これで、図1、2にも示されてい
るように金属管1の中空部13から組み付け部材2の外周
面に到達する油孔32が形成されたわけで、しかもこの油
孔32の内面は樹脂を充填し硬化させて形成しているので
油が漏洩するような隙間は一切なく、また樹脂材31の背
面にも隙間がないから、中空部13から送り込まれた潤滑
油は、途中洩れることなしに摺動面である組み付け部材
2の外周面に供給され、また、樹脂材31とカムピースと
の接着が剥離しても下孔23の径が下孔24の径よりもやや
大きいから、樹脂材31が抜け出ることがない。
After the resin material 31 is cured, as shown in FIG.
A radial oil hole 32 penetrating to the metal pipe 1 is formed near the center of the resin material 31. Thus, as shown in FIGS. 1 and 2, an oil hole 32 reaching the outer peripheral surface of the assembly member 2 from the hollow portion 13 of the metal tube 1 is formed, and the inner surface of the oil hole 32 is made of resin. Since there is no gap for oil leakage because it is formed by filling and hardening it, and there is no gap on the back surface of the resin material 31, the lubricating oil sent from the hollow part 13 does not leak on the way. Is supplied to the outer peripheral surface of the assembly member 2 which is a sliding surface, and the diameter of the pilot hole 23 is slightly larger than the diameter of the pilot hole 24 even if the adhesion between the resin material 31 and the cam piece is peeled off. 31 does not come out.

【0022】実施例2 本発明の第2の実施例を図4に示す。この実施例はカム
ピース2の内側部分と外側部分とを別部材で構成せず、
一体の部材とした組み立て式カムシャフトで、それ以外
の点は第1の実施例と同様である。予め下孔23を加工し
たカムピース2を金属管1の***部14に圧入して組み付
け、下孔23内に樹脂材31を充填する。樹脂材31の硬化
後、樹脂材31のほぼ中央に、金属管1まで貫通して油孔
32を加工して金属管1の中空部13から組み付け部材2の
外周面に到達する油孔32が形成される。第1の実施例と
同様、油孔32の内面は樹脂を充填し硬化させて形成して
いるので油が漏洩するような隙間は一切なく、また樹脂
材31の背面にも隙間がないから、中空部13から送り込ん
だ潤滑油は、途中洩れることなしに摺動面である組み付
け部材2の外周面に供給される。充填の際、樹脂材31は
金属管1の表面や金属管1との隙間g内にも浸透して硬
化するのでこれらの部分が引っ掛かりとなって、樹脂が
抜け出ることがない。
Second Embodiment A second embodiment of the present invention is shown in FIG. In this embodiment, the inner part and the outer part of the cam piece 2 are not composed of separate members,
It is an assembled camshaft which is an integral member, and is otherwise the same as the first embodiment. The cam piece 2 in which the pilot hole 23 is processed in advance is press-fitted into the raised portion 14 of the metal tube 1 to be assembled, and the resin material 31 is filled in the pilot hole 23. After the resin material 31 is hardened, an oil hole is penetrated through to the metal pipe 1 at almost the center of the resin material 31.
By processing 32, an oil hole 32 that reaches the outer peripheral surface of the assembly member 2 from the hollow portion 13 of the metal tube 1 is formed. As in the first embodiment, since the inner surface of the oil hole 32 is formed by filling and hardening the resin, there is no space for oil leakage, and there is no space on the back surface of the resin material 31. The lubricating oil sent from the hollow portion 13 is supplied to the outer peripheral surface of the assembly member 2, which is a sliding surface, without leaking on the way. At the time of filling, the resin material 31 penetrates into the surface of the metal tube 1 and the gap g between the metal tube 1 and hardens, so that these parts become caught and the resin does not come out.

【0023】また、下孔は位置、径ともに厳しい精度を
必要とせず、あとから加工する油孔も樹脂材の範囲内で
あればよいから多少の位置のずれは何等差し支えない。
さらに金属管に対しては予め下孔を加工する必要がない
など、低いコストで加工を行うことができる。
Further, the prepared hole does not require strict accuracy in terms of position and diameter, and the oil hole to be machined later may be within the range of the resin material, so that there is no problem in a slight positional deviation.
Further, the metal tube can be processed at a low cost because it is not necessary to process the prepared hole in advance.

【0024】[0024]

【発明の効果】本発明によれば、油漏れがなく確実な潤
滑を行うことができ、低コストでしかも樹脂材の脱落等
の劣化のおそれのないカムシャフトの製造方法が実現す
るという、すぐれた効果を奏する。
According to the present invention, a method for manufacturing a camshaft is realized which is capable of performing reliable lubrication without oil leakage, is low in cost, and is free from deterioration such as dropping of a resin material. Produce the effect.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の第1の実施例を示すカムシャフトの断
面図である。
FIG. 1 is a sectional view of a camshaft showing a first embodiment of the present invention.

【図2】図1のAA矢視による断面図である。FIG. 2 is a sectional view taken along the line AA of FIG.

【図3】本発明の第1の実施例のカムシャフトの加工手
順を示す要部断面図である。
FIG. 3 is a cross-sectional view of a main part showing a processing procedure of the cam shaft according to the first embodiment of the present invention.

【図4】本発明の第2の実施例を示すカムシャフトの断
面図である。
FIG. 4 is a sectional view of a camshaft showing a second embodiment of the present invention.

【図5】本発明に係わるカムシャフトの一例を示す正面
図である。
FIG. 5 is a front view showing an example of a camshaft according to the present invention.

【図6】従来の技術を示す金属管の一部の正面図であ
る。
FIG. 6 is a front view of a part of a metal tube showing a conventional technique.

【図7】従来の技術を示すカムピースの側面図である。FIG. 7 is a side view of a cam piece showing a conventional technique.

【図8】図7のカムピースがカムシャフトに圧入された
状態を示す正面図である。
8 is a front view showing a state where the cam piece of FIG. 7 is press-fitted into a cam shaft.

【図9】他の従来の技術を示すカムピースの側面図であ
る。
FIG. 9 is a side view of a cam piece showing another conventional technique.

【図10】図9のカムピースがカムシャフトに圧入された
状態を示す正面図である。
10 is a front view showing a state where the cam piece of FIG. 9 is press-fitted into a cam shaft.

【図11】さらに他の従来の技術を示すカムシャフトの断
面図である。
FIG. 11 is a cross-sectional view of a camshaft showing still another conventional technique.

【符号の説明】[Explanation of symbols]

1 金属管 2 カムピース(組み付け部材) 12 下孔 13 中空部 14 ***部 21 インナーピース(内側部材) 22 アウターピース(外側部材) 23、24 下孔 25a 円弧面 25b 弦面 31 樹脂材 32 油孔 33 パイプ材 1 metal tube 2 Cam piece (assembly member) 12 Pilot hole 13 Hollow part 14 Raised part 21 Inner piece (inner member) 22 Outer piece (outer member) 23, 24 pilot hole 25a circular surface 25b chord 31 Resin material 32 oil hole 33 Pipe material

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平4−350306(JP,A) 実開 平5−96409(JP,U) 実開 昭60−121552(JP,U) 実開 昭60−28651(JP,U) (58)調査した分野(Int.Cl.7,DB名) F01L 1/04 F01M 1/06 F01M 9/10 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-350306 (JP, A) Actually open 5-96409 (JP, U) Actually open 60-121552 (JP, U) Actually open 60- 28651 (JP, U) (58) Fields surveyed (Int.Cl. 7 , DB name) F01L 1/04 F01M 1/06 F01M 9/10

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 金属管の外周面に***部を形成し、この
***部の外径よりもやや小さい内径部分を備えた円孔を
有する組み付け部材を、前記円孔を前記金属管の***部
に圧入して組み付けてなる内燃機関の組み立て式カムシ
ャフトにおいて、予め半径方向の下孔を加工した組み付
け部材を金属管に組み付けた後、その下孔内に樹脂材を
充填して硬化させてから、この樹脂材に、前記金属管ま
で貫通する半径方向の油孔を加工することを特徴とする
内燃機関の組み立て式カムシャフトの製造方法。
1. A mounting member having a circular hole having an inner diameter portion slightly smaller than an outer diameter of the raised portion, the raised member being formed on the outer peripheral surface of the metal pipe. In an assembly type camshaft of an internal combustion engine that is press-fitted into the assembly, after assembling the assembly member in which the radial pilot hole is processed in advance to the metal pipe, and filling the pilot hole with the resin material and hardening it. A method for manufacturing a prefabricated camshaft for an internal combustion engine, characterized in that an oil hole in a radial direction that penetrates to the metal pipe is formed in the resin material.
【請求項2】 組み付け部材が、***部の外径よりもや
や小さい内径部分を備えた円孔を有するインナーピース
と、このインナーピースの外側に接合されるアウターピ
ースよりなり、前記インナーピースに形成する下孔の径
を前記アウターピースに形成する下孔の径よりも大きく
した請求項に記載の内燃機関の組み立て式カムシャフ
トの製造方法。
Wherein assembling member, and the inner piece <br/> having circular holes having a slightly smaller inner diameter than the outer diameter of the raised portion is joined to the outer side of the inner piece Autapi
The method for manufacturing a prefabricated camshaft for an internal combustion engine according to claim 1 , wherein the diameter of the pilot hole formed in the inner piece is larger than the diameter of the pilot hole formed in the outer piece .
JP26480194A 1994-10-28 1994-10-28 Method for manufacturing assembled camshaft of internal combustion engine Expired - Fee Related JP3429577B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26480194A JP3429577B2 (en) 1994-10-28 1994-10-28 Method for manufacturing assembled camshaft of internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26480194A JP3429577B2 (en) 1994-10-28 1994-10-28 Method for manufacturing assembled camshaft of internal combustion engine

Publications (2)

Publication Number Publication Date
JPH08121119A JPH08121119A (en) 1996-05-14
JP3429577B2 true JP3429577B2 (en) 2003-07-22

Family

ID=17408408

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26480194A Expired - Fee Related JP3429577B2 (en) 1994-10-28 1994-10-28 Method for manufacturing assembled camshaft of internal combustion engine

Country Status (1)

Country Link
JP (1) JP3429577B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5778841A (en) * 1997-02-26 1998-07-14 Cummins Engine Company, Inc. Camshaft for internal combustion engines

Also Published As

Publication number Publication date
JPH08121119A (en) 1996-05-14

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