JPH0598914A - Tappet for internal combustion engine valve system and insert method for shim - Google Patents

Tappet for internal combustion engine valve system and insert method for shim

Info

Publication number
JPH0598914A
JPH0598914A JP28725191A JP28725191A JPH0598914A JP H0598914 A JPH0598914 A JP H0598914A JP 28725191 A JP28725191 A JP 28725191A JP 28725191 A JP28725191 A JP 28725191A JP H0598914 A JPH0598914 A JP H0598914A
Authority
JP
Japan
Prior art keywords
tappet
shim
valve
valve stem
intake
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
JP28725191A
Other languages
Japanese (ja)
Inventor
Ariyuki Taima
在行 当間
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.)
Riken Corp
Original Assignee
Riken 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 Riken Corp filed Critical Riken Corp
Priority to JP28725191A priority Critical patent/JPH0598914A/en
Publication of JPH0598914A publication Critical patent/JPH0598914A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To reduce assembly manhour so as to form an internal shim type tappet in its light weight and in its compact size by providing lateral hole on the side wall of a tappet, and inserting the shim between a valve stem end part and a tappet stem contact surface from the lateral hole of the tappet. CONSTITUTION:A tappet 3 is provided in the hole 2 of a cylinder head 1. A valve stem end part 7 which abuts on the tappet 3 is provided on the top end of the valve stem 4, and an intake/exhaust valve 8 is provided on the bottom end thereof. A size between the tappet 3 and a cam shaft 11 is measured under condition in which the valve stem end part 7 abuts on a tappet stem contact surface 14. A shim 15 whose thickness represents the difference between this size and a tappet clearance, is put in selection. The valve stem 4 is pushed down by means of a cam nose part 13, and an intake/exhaust valve 8 is placed in opening condition. In this condition, a hold click 16 is interposed between a valve and a valve seat. A shim 15 is inserted between the valve stem end part 7 and the tappet stem contact surface 14 from the lateral hole of the tappet 3.

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、バルブステムエンド部
とタペットステム当り面との間にシムを介在させ易いス
テムとそのシム挿入法に関する内燃機関動弁機構用タペ
ットとシム挿入法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stem for easily inserting a shim between a valve stem end portion and a tappet stem abutment surface, and a tappet for an internal combustion engine valve mechanism and a shim insertion method relating to the shim insertion method.

【0002】[0002]

【従来の技術】内燃機関動弁機構のタペットとカムシャ
フトとの間の寸法を適正に保つため、バルブステムエン
ド部とタペットステム当り面との間にシムを介在させる
内シム方式と、ステムの頂面のタペットフェース面にシ
ムを配する外シム方式とが提案されている。
2. Description of the Related Art In order to maintain a proper dimension between a tappet and a camshaft of an internal combustion engine valve operating mechanism, an internal shim method in which a shim is interposed between a valve stem end portion and a tappet stem contact surface, and a stem An outer shim method has been proposed in which a shim is arranged on the tappet face surface of the top surface.

【0003】内シム方式は、動弁機構の軽量コンパクト
化も可能にし、出力増大、燃費向上に有利とされ、又、
外シム方式は、組付工数が少いという利点を有するが、
軽量コンパクト性では内シム方式に対して劣る。
The internal shim system enables the valve train mechanism to be lightweight and compact, and is advantageous for increasing output and improving fuel efficiency.
The outer shim method has the advantage that the number of assembly steps is small,
Lightweight and compact, it is inferior to the inner shim system.

【0004】そこで、内シム方式の組付工数を低減さ
せ、内シム方式のもつ本来的利点を活用することが望ま
れている。
Therefore, it is desired to reduce the number of assembling steps of the inner shim system and utilize the inherent advantages of the inner shim system.

【0005】内シム方式の概要を説明する。シリンダヘ
ッドのタペット穴に、内シム式タペットを挿入し且つカ
ムシャフトやバルブステムを所定位置取付けヘッドアッ
センブリーを完成させる。この状態で、バルブステムエ
ンド部とタペットステム当り面との間のシム厚さを測定
する。次いで、ヘッドアッセンブリーを分解し、内シム
タペットをシリンダヘッドから取出し、正規のシムをタ
ペットステム当り面に又はバルブステムエンド部に取付
ける。再度、内シム式タペットをシリンダヘッド穴に挿
入し、ヘッドアッセンブリーを再組立する。
The outline of the inner shim system will be described. The inner shim tappet is inserted into the tappet hole of the cylinder head, and the camshaft and the valve stem are attached at predetermined positions to complete the head assembly. In this state, the shim thickness between the valve stem end portion and the tappet stem contact surface is measured. Next, the head assembly is disassembled, the inner shim tappet is taken out from the cylinder head, and a proper shim is attached to the tappet stem contact surface or the valve stem end portion. Insert the inner shim type tappet into the cylinder head hole again and reassemble the head assembly.

【0006】以上から明らかなように、内シム式タペッ
トを用いる従来のヘッドアッセンブリーは、一度、該ア
ッセンブリーを完成させた後必要なシムの厚さを決め、
シムを選定する。この状態からヘッドアッセンブリーを
分解し、タペット又はバルブステムにシムを取付け、再
度、ヘッドアッセンブリーを完成させる。即ち、従来の
内シム式タペットを用いるものでは、一度、ヘッドアッ
センブリーを仮組立とし、シムを選定し、ヘッドアッセ
ンブリーを分解し且つシムを取付け、次いで、ヘッドア
ッセンブリーを再完成させる手順を用いる。このため組
立工数が多くなっている。
As is apparent from the above, in the conventional head assembly using the internal shim type tappet, once the assembly is completed, the required thickness of the shim is determined,
Select a shim. From this state, the head assembly is disassembled, the shim is attached to the tappet or the valve stem, and the head assembly is completed again. That is, in the conventional one using the internal shim type tappet, the head assembly is once temporarily assembled, the shim is selected, the head assembly is disassembled and the shim is attached, and then the head assembly is re-completed. Therefore, the number of assembling steps is increasing.

【0007】[0007]

【本発明が解決しようとする課題】前述した通り、従来
の内シム式タペットを用いるものでは、ヘッドアッセン
ブリーを二度完成させる必要があるため、組立工数を大
とさせている。従って、ヘッドアッセンブリーの組立を
一度にし、シムの選定と取付けを可能にすれば、組立工
数を低減させ、内シム式タペットの本来的な利点である
動弁機構の軽量コンパクト化を活用できることになる。
As described above, in the case of using the conventional internal shim type tappet, it is necessary to complete the head assembly twice, so that the number of assembling steps is large. Therefore, if the head assembly can be assembled at once and the shim can be selected and attached, the number of assembling steps can be reduced, and the inherent advantage of the inner shim type tappet, that is, the lightweight and compact valve mechanism can be utilized. ..

【0008】それ故、本発明は、内シム式タペットを用
いるヘッドアッセンブリーの組立を一度にし、シムの選
定の取付けを可能にすることを解決すべき課題とする。
[0008] Therefore, it is an object of the present invention to solve the problem that the head assembly using the internal shim type tappet is assembled at one time and the shim can be selectively attached.

【0009】[0009]

【課題を解決するための手段】本発明は、前述した課題
を解決するために、基本的には、横穴を有するタペット
を用いる。さらに、カムシャフトベース部とタペットフ
ェース面との間の寸法によりシム厚さを決め、必要な厚
みのシムを、タペット横穴からバルブステムエンド部に
配する手段を採用する。
In order to solve the above-mentioned problems, the present invention basically uses a tappet having a lateral hole. Further, the shim thickness is determined by the dimension between the camshaft base portion and the tappet face surface, and a means for arranging the shim having a required thickness from the tappet lateral hole to the valve stem end portion is adopted.

【0010】より具体的には、本発明は、内燃機関の吸
・排気弁のバルブステムエンド部とカムシャフトとの間
に配されるタペットにおいて、該タペットがその周壁に
穴を有することを特徴とする内燃機関動弁機構用タペッ
トを提供する。
More specifically, the present invention provides a tappet arranged between a valve stem end portion of an intake / exhaust valve of an internal combustion engine and a camshaft, wherein the tappet has a hole in its peripheral wall. Provided is a tappet for an internal combustion engine valve mechanism.

【0011】さらに、本発明は、吸・排気弁を閉じた状
態時のタペットフェース面とカムシャフトベース円部と
の間の寸法(H1)を測定すること、寸法(H1)と設計上
のタペットクリアランス(H2)との差の厚さのシムを選
定すること、バルブステムを押し下げ吸・排気弁とバル
ブシートとの間にホールド爪を介存させること、タペッ
トを上方に移動させ且つタペットの横穴よりバルブステ
ムエンド部とタペットステム当り面との間にシムを挿入
することよりなる内燃機関動弁機構用シム挿入法を提供
する。
Further, according to the present invention, the dimension (H 1 ) between the tappet face surface and the camshaft base circle portion when the intake / exhaust valve is closed is measured, and the dimension (H 1 ) and the design are taken into consideration. Select a shim with a thickness that is different from the tappet clearance (H 2 ), press the valve stem down, and hold a hold pawl between the intake / exhaust valve and the valve seat, move the tappet upward, and Provided is a shim insertion method for an internal combustion engine valve operating mechanism, which comprises inserting a shim between a valve stem end portion and a tappet stem contact surface through a lateral hole of a tappet.

【0012】[0012]

【作用】常に従い、ヘッドアッセンブリーを完成させ
る。タペットフェース面とカムシャフトベース部との間
の寸法(H1)を測定する。これは、吸・排気弁が閉状態
の寸法(H1)である。次に、バルブステムを押下げて、
吸・排気弁を開とし、ホールド爪をバルブフェース面と
バルブシートとの間に介在させる。
Function: The head assembly is completed as usual. Measure the dimension (H 1 ) between the tappet face and the camshaft base. This is the dimension (H 1 ) with the intake / exhaust valve closed. Next, push down the valve stem,
Open the intake / exhaust valve and place the hold claw between the valve face and the valve seat.

【0013】吸・排気弁を開に保った状態で、タペット
を上昇させカムシャフトベース円部に接触させる。タペ
ットの横穴よりバルブステムエンド部とタペットステム
当り面との間にシムを介在させる。タペットを所定位置
に下げ、図2の状態とし、次いで、ホールド爪を外し、
ヘッドアッセンブリーを完成させる。
With the intake / exhaust valve kept open, the tappet is raised and brought into contact with the camshaft base circle. A shim is interposed between the valve stem end and the tappet stem contact surface through the tappet lateral hole. Lower the tappet into place and bring it to the position shown in Figure 2, then remove the hold pawl,
Complete the head assembly.

【0014】本発明では、横穴付きのタペットを用いる
ので、前述した如く、ヘッドアッセンブリーを一度完成
させるのみで、シムの取付を可能にする。
In the present invention, since the tappet with the lateral hole is used, as described above, the shim can be attached by only completing the head assembly once.

【0015】[0015]

【実施例】図1と図2を参照する。シリンダヘッド1の
穴2内に、タペット3を配す。タペット3は、頂壁付き
の円筒状にして、穴2内を摺動する。タペット3は、バ
ルブステム4のリテーナ5と穴2の底壁との間に配した
スプリング6の附勢力を受け、上方位置をとる。バルブ
ステム4はその上端にタペット3に当接するバルブステ
ムエンド部7を有し、且つその下端に吸・排気弁8を有
す。吸・排気弁8が吸・排気ポート9の開閉をなす。1
0はバルブシートを示す。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIGS. The tappet 3 is placed in the hole 2 of the cylinder head 1. The tappet 3 has a cylindrical shape with a top wall and slides in the hole 2. The tappet 3 receives an urging force of a spring 6 arranged between the retainer 5 of the valve stem 4 and the bottom wall of the hole 2 and takes an upper position. The valve stem 4 has a valve stem end portion 7 in contact with the tappet 3 at its upper end, and an intake / exhaust valve 8 at its lower end. The intake / exhaust valve 8 opens and closes the intake / exhaust port 9. 1
0 indicates a valve seat.

【0016】タペット3の上方には、カムシャフト11
を配す。カムシャフトは、カムシャフトベース円部12
とカムノーズ部13を有す。吸・排気弁8を閉じ且つカ
ムシャフトベース部12がタペット3のタペットフェー
ス面13′に対向し、さらに、バルブステムエンド部7
がタペットステム当り面14に当接状態で、タペット3
とカムシャフト11との間の寸法(H1)を測定する。
Above the tappet 3, a camshaft 11 is provided.
Distribute. The camshaft is the camshaft base circle 12
And a cam nose portion 13. The intake / exhaust valve 8 is closed, the camshaft base portion 12 faces the tappet face surface 13 ′ of the tappet 3, and the valve stem end portion 7
Is in contact with the tappet stem contact surface 14, the tappet 3
The dimension (H 1 ) between the camshaft 11 and the camshaft 11 is measured.

【0017】寸法(H1)とタペットクリアランス(H2)
との差(H)を厚みとするシム15を選考する。
Dimension (H 1 ) and tappet clearance (H 2 )
A shim 15 having a thickness (H) is selected.

【0018】次に、バルブステム4を何んらかの手段、
たとえば、カムノーズ部13を用いて、押下げ、吸・排
気弁8を開状態とさせる。この状態で、ホールド爪16
を弁8とバルブシート10との間に介在させる。図2の
状態(但しシム15は未介在)では、タペット3は自由
状態なので、磁石や吸口を用いてタペット3を上方に持
上げ、図3の如くする。
Next, the valve stem 4 is replaced by some means,
For example, the cam nose portion 13 is used to push down and open the intake / exhaust valve 8. In this state, hold claw 16
Is interposed between the valve 8 and the valve seat 10. In the state of FIG. 2 (however, the shim 15 is not present), since the tappet 3 is in a free state, the tappet 3 is lifted upward by using a magnet or a suction port, as shown in FIG.

【0019】タペット3の横穴17は、シリンダヘッド
1の切欠き部18に対向し、バルブステムエンド部7と
タペットステム当り面14との間を横穴17を介して外
部に連通させる。シム自動装着機19を用い、シム15
をバルブステムエンド部7に装着する(図3参照)。
The lateral hole 17 of the tappet 3 faces the cutout portion 18 of the cylinder head 1, and connects the valve stem end portion 7 and the tappet stem contact surface 14 to the outside through the lateral hole 17. Using the automatic shim mounting machine 19, shim 15
Is attached to the valve stem end portion 7 (see FIG. 3).

【0020】前述手順を完成させると図2の通りとな
る。ホールド爪16を外し、吸・排気弁8を閉じ、タペ
ット3のタペットフェース面13′をカムシャフトベー
ス円部12に接触させ、ヘッドアッセンブリーを完成さ
せる。
The above procedure is completed as shown in FIG. The hold pawl 16 is removed, the intake / exhaust valve 8 is closed, and the tappet face surface 13 'of the tappet 3 is brought into contact with the camshaft base circular portion 12 to complete the head assembly.

【0021】横穴17は、図5に示す如く、好ましく
は、120度間隔で3ケ設ける。タペット3の周壁上部
に肉厚部20とし、この肉厚部の下側に横穴17を設け
る。肉厚部は必須でない。横穴17の大きさは、たとえ
ば、高さ5mm、巾8−12mm程度とする。シムの厚さ
は、たとえば、1−2mmとなろう。
As shown in FIG. 5, three lateral holes 17 are preferably provided at 120-degree intervals. A thick portion 20 is formed on the upper portion of the peripheral wall of the tappet 3, and a lateral hole 17 is provided below the thick portion. The thick part is not essential. The size of the lateral hole 17 is, for example, 5 mm in height and 8-12 mm in width. The thickness of the shim will be, for example, 1-2 mm.

【0022】[0022]

【効果】本発明によれば、内シム方式であって、しか
も、ヘッドアッセンブリーを一度完成させればよいの
で、組付工数が外シム方式と同じようになる。よって、
軽量、コンパクト化という内シム方式の本来的効果を充
分発揮できる。
According to the present invention, since the inner shim system is used and the head assembly only has to be completed once, the assembly man-hour becomes the same as that of the outer shim system. Therefore,
The inherent effects of the inner shim system, which are light and compact, can be fully demonstrated.

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

【図1】本発明の一例のタペット部の部分詳細図であ
る。
FIG. 1 is a partial detailed view of a tappet portion of an example of the present invention.

【図2】本発明によるタペットにシムを付けた状態の断
面図である。
FIG. 2 is a cross-sectional view of a tappet according to the present invention with shims attached.

【図3】シム挿入時を示す部分詳細図である。FIG. 3 is a partial detailed view showing a state where a shim is inserted.

【図4】本発明の一例のタペットの展開図である。FIG. 4 is a development view of a tappet according to an example of the present invention.

【図5】図4の矢視V−Vよりみた断面図である。5 is a cross-sectional view taken along the line VV of FIG.

【符号の説明】[Explanation of symbols]

1 シリンダヘッド 2 穴 3 タペット 4 バルブステム 6 スプリング 8 吸・排気弁 11 カムシャフト 15 シム 16 ホールド爪 17 横穴 1 Cylinder Head 2 Hole 3 Tappet 4 Valve Stem 6 Spring 8 Intake / Exhaust Valve 11 Camshaft 15 Shim 16 Hold Claw 17 Side Hole

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 内燃機関の吸・排気弁のバルブステムエ
ンド部とカムシャフトとの間に配されるタペットにおい
て、該タペットがその周壁に横穴を有することを特徴と
する内燃機関動弁機構用タペット。
1. A tappet disposed between a valve stem end portion of an intake / exhaust valve of an internal combustion engine and a cam shaft, wherein the tappet has a lateral hole in its peripheral wall. Tappet.
【請求項2】 吸・排気弁を閉じた状態時のタペットフ
ェース面とカムシャフトベース円部との間の寸法(H1)
を測定すること、寸法(H1)と設計上のタペットクリア
ランス(H2)との差の厚さのシムを選定すること、バル
ブステムを押し下げ吸・排気弁とバルブシートとの間に
ホールド爪を介存させること、タペットを上方に移動さ
せ且つタペットの横穴よりバルブステムエンド部とタペ
ットステム当り面との間にシムを挿入することよりなる
内燃機関動弁機構用シム挿入法。
2. The dimension (H 1 ) between the tappet face surface and the camshaft base circle when the intake / exhaust valve is closed.
Measuring, selecting a shim with a thickness that is the difference between the dimension (H 1 ) and the designed tappet clearance (H 2 ), pushing down the valve stem, and holding claw between the intake / exhaust valve and the valve seat. And a shim insertion method for an internal combustion engine valve operating mechanism, which comprises moving a tappet upward and inserting a shim between a valve stem end portion and a tappet stem contact surface through a lateral hole of the tappet.
JP28725191A 1991-10-08 1991-10-08 Tappet for internal combustion engine valve system and insert method for shim Pending JPH0598914A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28725191A JPH0598914A (en) 1991-10-08 1991-10-08 Tappet for internal combustion engine valve system and insert method for shim

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28725191A JPH0598914A (en) 1991-10-08 1991-10-08 Tappet for internal combustion engine valve system and insert method for shim

Publications (1)

Publication Number Publication Date
JPH0598914A true JPH0598914A (en) 1993-04-20

Family

ID=17714981

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28725191A Pending JPH0598914A (en) 1991-10-08 1991-10-08 Tappet for internal combustion engine valve system and insert method for shim

Country Status (1)

Country Link
JP (1) JPH0598914A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5904123A (en) * 1997-05-26 1999-05-18 Ina Walzlager Schaeffler Ohg Mechanical valve tappet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5904123A (en) * 1997-05-26 1999-05-18 Ina Walzlager Schaeffler Ohg Mechanical valve tappet

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