JPH0639041Y2 - Rocker arm device for four-cycle engine - Google Patents
Rocker arm device for four-cycle engineInfo
- Publication number
- JPH0639041Y2 JPH0639041Y2 JP1113988U JP1113988U JPH0639041Y2 JP H0639041 Y2 JPH0639041 Y2 JP H0639041Y2 JP 1113988 U JP1113988 U JP 1113988U JP 1113988 U JP1113988 U JP 1113988U JP H0639041 Y2 JPH0639041 Y2 JP H0639041Y2
- Authority
- JP
- Japan
- Prior art keywords
- rocker arm
- cycle engine
- screw hole
- arm device
- valve
- 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 - Lifetime
Links
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 この考案は、四サイクルエンジンのロッカーアーム装置
に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a rocker arm device for a four-cycle engine.
四サイクルエンジンのロッカーアームには、シーソー型
とエンドピボット型がある。エンドピボット型は、ロッ
カーアームの基部に球面凹部を設けて球面状のピボット
に揺動自在に被着し、先端を傘型の吸排気用バルブの上
端に乗せ、上面を回転するカムシャフトのカムで押え
て、ロッカーアームを揺動させて、バルブをバネに抗し
て押下げて開くようになっている。ロッカーアームの基
部の球面凹部をピボットに被着させただけでは、ロッカ
ーアームが傾くことがあるので、ロッカーアームが傾か
ないように、左右両側にストッパーを設けたり、基部を
板バネで保持する必要があって複雑になる。例えば、実
公昭46-2242号公報、実開昭58-139503号公報参照。又、
ロッカーアームの基部のピボット又は、先端のバルブ上
端に当る部分に、アジャストネジを設けて、バルブとの
クリアランスを調節できるようにしていて、この面で
も、構造が複雑で、組付けも面倒である不便がある。The rocker arm of the four-cycle engine has a seesaw type and an end pivot type. The end pivot type has a spherical recess on the base of the rocker arm and is swingably attached to a spherical pivot, and the tip is placed on the upper end of an umbrella-shaped intake / exhaust valve, and the cam of a camshaft that rotates on the upper surface. The rocker arm is swung, and the valve is pushed down against the spring to open it. The rocker arm may tilt if the spherical recess at the base of the rocker arm is simply attached to the pivot.Therefore, it is necessary to provide stoppers on the left and right sides and hold the base with leaf springs to prevent the rocker arm from tilting. It makes it complicated. For example, see Japanese Utility Model Publication No. 46-2242 and Japanese Utility Model Publication No. 58-139503. or,
An adjustment screw is provided on the pivot of the rocker arm at the base or at the tip of the rocker arm that contacts the upper end of the valve, so that the clearance with the valve can be adjusted. There is inconvenience.
〔考案の目的〕 この考案は、ロッカーアームの基部に平らなテーパー面
を形成したアジャストスクリューを螺合し、アジャスト
スクリューで、ロッカーアームの傾きを防止できると共
にバルブとのクリアランスを調節できて、構造を簡単に
できて安価に製作でき、組付けも簡単にできる四サイク
ルエンジンのロッカーアーム装置を得ることを目的とす
る。[Purpose of the Invention] This invention has a structure in which a rocker arm has a flat tapered surface formed with an adjusting screw, which can prevent the rocker arm from tilting and adjust the clearance with a valve. It is an object of the present invention to obtain a rocker arm device for a four-cycle engine that can be easily manufactured at low cost and can be easily assembled.
以下、本考案を図面に示す実施例によって説明する。 Hereinafter, the present invention will be described with reference to the embodiments shown in the drawings.
ロッカーアーム１は、基部に下向きに突設した前後の跨
ぎ部２を一体に形成する。そして、跨ぎ部２に斜めのネ
ジ孔３を穿設する。ネジ孔３には、平らなテーパー面４
を形成したアジャストスクリュー５を螺合する。シリン
ダーヘッド６には、支軸７を軸架し、支軸７に前後の跨
ぎ部２を跨がせてアジャストスクュー５の平らなテーパ
ー面４を乗せ、ロッカーアーム１の基部を支軸７に揺動
自在に支持させる。ロッカーアーム１の先端は、吸気又
は排気用のバルブ８の上端に当接させる。バルブ８は、
バネ９で閉じるように付勢してあって、バネ９に抗して
上端を押すと、下方に摺動して開く。ロッカーアーム１
の上面には、クランクシャフトに連動するカムシャフト
10のカム11を当てる。ロッカーアーム１の基部両側に
は、支軸７を軸架するシリンダーヘッド６のボス12が突
出しているので、ロッカーアーム１は、ボス12で、支軸
７の軸方向に規制される。The rocker arm 1 is integrally formed with a front and rear straddle portion 2 which projects downward from the base portion. Then, an oblique screw hole 3 is formed in the straddle portion 2. The screw hole 3 has a flat tapered surface 4
The adjust screw 5 formed with is screwed. A spindle 7 is mounted on the cylinder head 6, the front and rear straddle portions 2 are straddled on the spindle 7, and the flat taper surface 4 of the adjustment squeeze 5 is placed thereon. 7 is swingably supported. The tip of the rocker arm 1 is brought into contact with the upper end of the valve 8 for intake or exhaust. Valve 8
It is urged to close by the spring 9, and when the upper end is pushed against the spring 9, it slides downward and opens. Rocker arm 1
On the upper surface of the, the camshaft that interlocks with the crankshaft
Hit the cam 11 of 10. Since the boss 12 of the cylinder head 6 which hangs the support shaft 7 projects from both sides of the base of the rocker arm 1, the rocker arm 1 is restricted by the boss 12 in the axial direction of the support shaft 7.
ロッカーアーム１の基部は、跨ぎ部２が、支軸７の前後
を挟んでおり、アジャストスクリュー５の平らなテーパ
ー面４が支軸７の上面に当っていて、傾きを防止でき
る。そして、ロッカーアーム１は支軸７の軸方向にもシ
リンダーヘッド６のボス12で受けられていて、位置決め
されて、摺動自在に支持される。カムシャフト10はカム
11の回転で、ロッカーアーム１を揺動させて押下げ、バ
ルブ８をバネ９に抗して押下げて開く。ロッカーアーム
１の先端とバルブ８のクリアランスは、アジャストスク
リュー５を螺合するネジ孔３が角度αだけ斜めにしてあ
るので、アジャストスクリュー５を回して位置を調節す
ることによって、ロッカーアーム１とバルブ８の隙間を
調節できる。At the base of the rocker arm 1, the straddle 2 sandwiches the front and rear of the support shaft 7, and the flat taper surface 4 of the adjusting screw 5 contacts the upper surface of the support shaft 7 to prevent tilting. The rocker arm 1 is also received in the axial direction of the support shaft 7 by the boss 12 of the cylinder head 6, and is positioned and slidably supported. Camshaft 10 is cam
With the rotation of 11, the rocker arm 1 is rocked and pushed down, and the valve 8 is pushed down against the spring 9 to open. With respect to the clearance between the tip of the rocker arm 1 and the valve 8, the screw hole 3 into which the adjusting screw 5 is screwed is inclined by an angle α. Therefore, by rotating the adjusting screw 5 to adjust the position, the rocker arm 1 and the valve 8 can be adjusted. You can adjust the gap of 8.
以上説明したように、この考案は、ロッカーアームの基
部に下向きに突設した跨ぎ部を形成し、該跨ぎ部に斜め
のネジ孔を設け、該ネジ孔に平らなテーパー面を形成し
たアジャストスクリューを螺合し、シリンダーヘッドに
軸架した支軸にロッカーアームの基部の跨ぎ部を跨がせ
て平らなテーパー面を支軸上面に当てて揺動自在に支持
させたので、アジャストスクリューの平らなテーパー面
が支軸に当って、ロッカーアームの傾きを防止でき、
又、アジャストスクリューの位置調節で、バルブクリア
ランスが調節できる。こうして、構造が簡単で安価に製
作でき、組付けの手間も簡単にできる。As described above, the present invention is an adjusting screw in which a base portion of a rocker arm is formed with a straddle portion projecting downward, an oblique screw hole is formed in the straddle portion, and a flat taper surface is formed in the screw hole. The rocker arm's base straddling part on the support shaft mounted on the cylinder head, and the flat taper surface was applied to the support shaft upper surface so that it could swing freely. The tapered surface hits the spindle, preventing the rocker arm from tilting,
Also, the valve clearance can be adjusted by adjusting the position of the adjusting screw. In this way, the structure is simple and the manufacturing cost is low, and the assembling work is also easy.
図は本考案の一実施例を示し、第１図は要部の縦断側面
図、第２図は斜視図、第３図はアジャストスクリューの
斜視図、第４図は全体の縦断側面図である。 １……ロッカーアーム、２……跨ぎ部、３……ネジ孔、
４……テーパー面、５……アジャストスクリュー、６…
…シリンダーヘッド、７……支軸。FIG. 1 shows an embodiment of the present invention, FIG. 1 is a vertical sectional side view of a main portion, FIG. 2 is a perspective view, FIG. 3 is a perspective view of an adjusting screw, and FIG. 4 is a vertical sectional side view of the whole. . 1 ... rocker arm, 2 ... straddle, 3 ... screw hole,
4 ... tapered surface, 5 ... adjustment screw, 6 ...
… Cylinder head, 7… spindle.
Claims (1)
跨ぎ部を形成し、該跨ぎ部に斜めのネジ孔を設け、該ネ
ジ孔に平らなテーパー面を形成したアジャストスクリュ
ーを螺合し、シリンダーヘッドに軸架した支軸にロッカ
ーアームの基部の跨ぎ部を跨がせて上記平らなテーパー
面を支軸上面に当てて摺動自在に支持させたことを特徴
とする四サイクルエンジンのロッカーアーム装置。1. A rocker arm is formed with a straddle portion projecting downward at the base portion, an oblique screw hole is provided in the straddle portion, and an adjusting screw having a flat tapered surface is screwed into the screw hole, A rocker for a four-cycle engine, characterized in that a supporting shaft mounted on a cylinder head straddles a straddling part of a base part of a rocker arm and the flat taper surface is applied to an upper surface of the supporting shaft so as to be slidably supported. Arm device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1113988U JPH0639041Y2 (en) | 1988-02-01 | 1988-02-01 | Rocker arm device for four-cycle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1113988U JPH0639041Y2 (en) | 1988-02-01 | 1988-02-01 | Rocker arm device for four-cycle engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01118107U JPH01118107U (en) | 1989-08-09 |
| JPH0639041Y2 true JPH0639041Y2 (en) | 1994-10-12 |
Family
ID=31219425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1113988U Expired - Lifetime JPH0639041Y2 (en) | 1988-02-01 | 1988-02-01 | Rocker arm device for four-cycle engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0639041Y2 (en) |
-
1988
- 1988-02-01 JP JP1113988U patent/JPH0639041Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01118107U (en) | 1989-08-09 |
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