JPS63112206U - - Google Patents
Info
- Publication number
- JPS63112206U JPS63112206U JP355687U JP355687U JPS63112206U JP S63112206 U JPS63112206 U JP S63112206U JP 355687 U JP355687 U JP 355687U JP 355687 U JP355687 U JP 355687U JP S63112206 U JPS63112206 U JP S63112206U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve lifter
- hole
- cam
- drive mechanism
- 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.)
- Granted
Links
- KJFBVJALEQWJBS-XUXIUFHCSA-N maribavir Chemical compound CC(C)NC1=NC2=CC(Cl)=C(Cl)C=C2N1[C@H]1O[C@@H](CO)[C@H](O)[C@@H]1O KJFBVJALEQWJBS-XUXIUFHCSA-N 0.000 claims 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Description
第１図は本考案の第１、第２実施例によるバル
ブ駆動機構の断面図、第２図は第１実施例につい
ての第１図のＡ―Ａ断面図、第３図は第２実施例
についての第１図のＡ―Ａ断面図、第４図、第５
図は第３実施例によるバルブ駆動機構のバルブリ
フタ孔の各種の形状を示す断面図、第６図は従来
技術によるバルブ駆動機構の断面図、第７図は第
６図のバルブリフタの使用後の状態を示す斜視図
、第８図は第６図のバルブリフタの使用後の変形
した状態の説明図、第９図は従来技術による改良
案のバルブリフタの断面図を示す。
１……バルブステム、２……シリンダヘツド、
３……バルブリフタ孔、４……バルブリフタ、４
ａ……バルブリフタ頂壁の内面、４ｂ……バルブ
リフタ頂壁の外面、４ｃ……バルブリフタ外側面
、５……シム、６……カム。
FIG. 1 is a sectional view of a valve drive mechanism according to the first and second embodiments of the present invention, FIG. 2 is a sectional view taken along line AA in FIG. 1 for the first embodiment, and FIG. 3 is a sectional view of the second embodiment. AA sectional view of Fig. 1, Fig. 4, Fig. 5
The figures are cross-sectional views showing various shapes of the valve lifter hole of the valve drive mechanism according to the third embodiment, FIG. 6 is a cross-sectional view of the valve drive mechanism according to the prior art, and FIG. 7 is the state of the valve lifter of FIG. 6 after use. 8 is an explanatory view of the valve lifter of FIG. 6 in a deformed state after use, and FIG. 9 is a sectional view of an improved valve lifter according to the prior art. 1...Valve stem, 2...Cylinder head,
3... Valve lifter hole, 4... Valve lifter, 4
a... Inner surface of the top wall of the valve lifter, 4b... Outer surface of the top wall of the valve lifter, 4c... Outer surface of the valve lifter, 5... Shim, 6... Cam.
Claims (1)
りのシリンダヘツド内に前記バルブステムと共軸
の筒形状のバルブリフタ孔を形成し、該バルブリ
フタ孔内にカツプ状のバルブリフタをその中で摺
動可能に挿入し、該バルブリフタの頂壁の内面を
前記バルブステムの先端部に当接せしめると共に
前記バルブリフタの頂壁の外面をシムを介してカ
ムシヤフトとカムと接触せしめるようにした直接
駆動式オーバーヘツドカム方式のエンジンのバル
ブ駆動機構において、 前記バルブリフタ孔の形状をバルブリフタが強
く当る部分に対応して該バルブリフタ孔とバルブ
リフタとの摺動面の間隙が大きくなるように形成
したことを特徴とするエンジンのバルブ駆動機構
。 ２ 前記バルブリフタ孔の形状をカム軸方向側の
内径よりもカム摺動方向側の内径を大きくした一
定の形状の断面を有する筒形状とした実用新案登
録請求の範囲第１項記載のエンジンのバルブ駆動
機構。 ３ 前記バルブリフタ孔の形状をカム側に位置し
た該バルブリフタ孔上部の内径よりも該バルブリ
フタ孔下部の内径の方が大きい円筒形状とした実
用新案登録請求の範囲第１項記載のエンジンのバ
ルブ駆動機構。[Claims for Utility Model Registration] 1. A cylindrical valve lifter hole coaxial with the valve stem is formed in the cylinder head around the tip of the intake or exhaust valve stem, and a cup-shaped valve lifter is formed in the valve lifter hole. is slidably inserted therein, and the inner surface of the top wall of the valve lifter is brought into contact with the tip of the valve stem, and the outer surface of the top wall of the valve lifter is brought into contact with the camshaft and the cam via a shim. In the valve drive mechanism of a direct-drive overhead cam engine, the shape of the valve lifter hole is formed so that the gap between the sliding surface of the valve lifter hole and the valve lifter becomes larger in accordance with the portion that the valve lifter strongly contacts. An engine valve drive mechanism characterized by: 2. The engine valve according to claim 1, wherein the valve lifter hole has a cylindrical shape with a cross section of a certain shape, with the inner diameter on the cam sliding direction side being larger than the inner diameter on the cam shaft direction side. Drive mechanism. 3. The engine valve drive mechanism according to claim 1, wherein the valve lifter hole has a cylindrical shape in which the inner diameter of the lower part of the valve lifter hole is larger than the inner diameter of the upper part of the valve lifter hole located on the cam side. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987003556U JPH0625605Y2 (en) | 1987-01-16 | 1987-01-16 | Engine valve drive mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987003556U JPH0625605Y2 (en) | 1987-01-16 | 1987-01-16 | Engine valve drive mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63112206U true JPS63112206U (en) | 1988-07-19 |
| JPH0625605Y2 JPH0625605Y2 (en) | 1994-07-06 |
Family
ID=30783424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987003556U Expired - Lifetime JPH0625605Y2 (en) | 1987-01-16 | 1987-01-16 | Engine valve drive mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0625605Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6328804U (en) * | 1986-08-08 | 1988-02-25 |
-
1987
- 1987-01-16 JP JP1987003556U patent/JPH0625605Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6328804U (en) * | 1986-08-08 | 1988-02-25 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0625605Y2 (en) | 1994-07-06 |
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