JPH07647Y2 - Rocker arm adjustment mechanism - Google Patents
Rocker arm adjustment mechanismInfo
- Publication number
- JPH07647Y2 JPH07647Y2 JP1166388U JP1166388U JPH07647Y2 JP H07647 Y2 JPH07647 Y2 JP H07647Y2 JP 1166388 U JP1166388 U JP 1166388U JP 1166388 U JP1166388 U JP 1166388U JP H07647 Y2 JPH07647 Y2 JP H07647Y2
- Authority
- JP
- Japan
- Prior art keywords
- rocker arm
- cap
- tip
- adjustment mechanism
- spherical head
- 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］ この考案は吸・排気弁等を駆動するロッカアームに係
り、特に、ロッカアームの駆動量を微調整するためのロ
ッカアームの調整機構に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a rocker arm for driving intake / exhaust valves and the like, and more particularly to a rocker arm adjustment mechanism for finely adjusting the drive amount of the rocker arm.
［従来の技術］ 吸・排気弁にロッカアームの駆動力を好適に伝達させよ
うとした提案に第４図に示す本出願人提案の「ロッカア
ーム」（実開昭59−67502号公報）がある。[Prior Art] As a proposal for appropriately transmitting the driving force of the rocker arm to the intake / exhaust valve, there is a "rocker arm" (Japanese Utility Model Laid-Open No. 59-67502) proposed by the present applicant as shown in FIG.
この「ロッカアーム」は、ロッカアームａに取り付けた
微調整用のアジャストスクリューｂの先端に、吸・排気
弁のステムエンドｃと当接されるキャップｄを揺動自在
に嵌合し、上記キャップｄと上記ロッカアームａ間に上
記キャップｄをステムエンドｃ側へ付勢する弾性部材ｅ
を設けて構成される。したがって、その弾性部材ｅによ
ってキャップｄの揺動を好適に規制すると共に吸・排気
弁の駆動方向に対してロッカアームａの駆動力が良好に
伝達されるようになる。In this "rocker arm", a cap d that is in contact with the stem end c of the intake / exhaust valve is swingably fitted to the tip of an adjustment screw b for fine adjustment attached to the rocker arm a. An elastic member e for urging the cap d toward the stem end c side between the rocker arms a.
Is provided and configured. Therefore, the swinging of the cap d is suitably controlled by the elastic member e, and the driving force of the rocker arm a is favorably transmitted in the driving direction of the intake / exhaust valve.
［考案が解決しようとする課題］ しかしながら、上記アジャストスクリューｂの先端に対
して相対的に揺動するキャップｄの運動は、アジャスト
スクリューｂの先端に対して滑り運動であるから潤滑油
の供給が不足しがちな機関の始動時、あるいは低速回転
時に著しく摩耗が進行する不具合があり、課題として指
摘されていた。[Problems to be Solved by the Invention] However, since the movement of the cap d, which swings relative to the tip of the adjusting screw b, is a sliding movement with respect to the tip of the adjusting screw b, the supply of the lubricating oil is difficult. It has been pointed out that there is a problem that wear tends to progress remarkably at the time of starting the engine or at low speed rotation, which tends to be insufficient.
［課題を解決するための手段］ この考案は上記課題を解決することを目的とし、ロッカ
アームのアジャストスクリュー先端に弁棒の後端と当接
されるキャップを揺動自在に嵌合する球面頭部を形成
し、この球面頭部の先端が接する上記キャップの内底を
平滑面にしてロッカアームの調整機構を構成したもので
ある。[Means for Solving the Problems] The present invention is intended to solve the above problems, and a spherical head in which a cap that is brought into contact with a rear end of a valve rod is rockably fitted to a tip of an adjusting screw of a rocker arm. And the inner bottom of the cap with which the tip of the spherical head is in contact is made a smooth surface to constitute a rocker arm adjusting mechanism.
［作用］ キャップの内底を平滑面に形成すると、ロッカアームの
駆動時の球面頭部とキャップとの揺動支点は、キャップ
の上部側に位置されるようになる。この結果、球面頭部
の先端は平滑面に対して相対的にころがり運動するよう
になり、実質的に球面頭部の摩耗が抑制される。[Operation] When the inner bottom of the cap is formed to have a smooth surface, the swinging fulcrum of the spherical head and the cap when the rocker arm is driven is located on the upper side of the cap. As a result, the tip end of the spherical head portion rolls relative to the smooth surface, and wear of the spherical head portion is substantially suppressed.
［実施例］ 以下にこの考案の好適一実施例を添付図面に基づいて説
明する。[Embodiment] A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.
第１図に示す１はカムまたはタペット等で駆動されるロ
ッカアームで、このロッカアーム１の作用点側となるア
ーム２には先端に球面頭部４を一体的に有したアジャス
トスクリュー５が螺合して設けられており、その球面頭
部４には、吸気または排気弁等の弁棒６の後端７と当接
されるキャップ８が揺動自在に嵌合されている。実施例
にあってキャップ８は、第２図にも示してあるように、
上記球面頭部４の周側球面部９の摺動嵌合する曲率を有
して内周面10を形成した筒状のインサート部材11と、こ
のインサート部材11を一体的に嵌合すると共に、上記球
面頭部４の先端の球面部13が接する平滑面14を形成する
カップ状のキャップ本体15とから構成され、先端の球面
部13は、上記周側球面部９に対して大きな曲率を有して
形成される。Reference numeral 1 shown in FIG. 1 is a rocker arm that is driven by a cam or tappet or the like, and an adjusting screw 5 having a spherical head 4 integrally at the tip is screwed into an arm 2 that is the point of action of the rocker arm 1. A cap 8 which is brought into contact with a rear end 7 of a valve rod 6 such as an intake or exhaust valve is swingably fitted to the spherical head portion 4. In the embodiment, the cap 8 is, as shown in FIG.
A cylindrical insert member 11 having an inner peripheral surface 10 having a curvature for slidingly fitting the peripheral spherical surface portion 9 of the spherical head portion 4, and the insert member 11 are integrally fitted, It is composed of a cup-shaped cap body 15 that forms a smooth surface 14 with which the spherical surface portion 13 at the tip of the spherical head 4 contacts, and the spherical surface portion 13 at the tip has a large curvature with respect to the peripheral spherical surface portion 9. Formed.
ところで、実施例にあってはインサート部材11の上部外
周側には面取部分16が形成してあり、上記キャップ本体
15の上部をカシメ処理することでインサート部材11をキ
ャップ本体15に一体化するようにしている。また、イン
サート部材11の硬度（表面硬度）は上記周側球面部９に
対して高くなる材料で形成されるか、または、表面処理
を施してある。17はインサート部材11の周側球面部９の
上部に形成されたリップ部で、18はそのリップ部17と係
合し、キャップ８の揺動限界を定めるノッチ部分であ
る。By the way, in the embodiment, the chamfered portion 16 is formed on the upper outer peripheral side of the insert member 11,
The insert member 11 is integrated with the cap body 15 by crimping the upper portion of the cap member 15. Further, the hardness (surface hardness) of the insert member 11 is formed of a material that is higher than that of the peripheral spherical surface portion 9 or is surface-treated. Reference numeral 17 denotes a lip portion formed on the upper portion of the peripheral spherical surface portion 9 of the insert member 11, and reference numeral 18 denotes a notch portion that engages with the lip portion 17 and determines the swing limit of the cap 8.
第３図はキャップ８に対するアジャストスクリュー５の
相対運動を示した解析図である。FIG. 3 is an analysis diagram showing the relative movement of the adjusting screw 5 with respect to the cap 8.
同図に示してあるように、アジャストスクリュー５を相
対的に揺動させると、先端の球面部13が平滑面14上をこ
ろがるように移動することが確認できる。また、このと
きノッチ部分18側を支点として周側球面部９がインサー
ト部材11の内周面に沿って摺動することも確認すること
ができる。As shown in the figure, it can be confirmed that when the adjusting screw 5 is relatively swung, the spherical surface portion 13 at the tip end moves so as to roll on the smooth surface 14. At this time, it can also be confirmed that the peripheral spherical surface portion 9 slides along the inner peripheral surface of the insert member 11 with the notch portion 18 side as a fulcrum.
［考案の効果］ 以上説明したことから明らかなようにこの考案によれば
ロッカアームのアジャストスクリュー先端に弁棒の後端
と当接されるキャップを揺動自在に嵌合する球面頭部を
形成し、球面頭部の先端が接する上記キャップの内底を
平滑面にしてロッカアームの調整機構を構成したから、
平滑面に接する球面頭部の摩耗を防止することができ、
アジャストスクリューのクリアランス調節値を一定に維
持することができる。[Effect of the Invention] As is apparent from the above description, according to the present invention, a spherical head is formed at the tip of the adjusting screw of the rocker arm so that the cap abutting against the rear end of the valve rod is swingably fitted. , The rocker arm adjustment mechanism is configured by making the inner bottom of the cap, which is in contact with the tip of the spherical head, a smooth surface.
It is possible to prevent wear of the spherical head that contacts the smooth surface,
The clearance adjustment value of the adjustment screw can be maintained constant.
第１図はこの考案の好適一実施例を示す概略図、第２図
は第１図の要部詳細図、第３図はアジャストスクリュー
とキャップとの相対運動を示す解析図、第４図は従来例
としてのロッカアームを示す概略図である。 図中、１はロッカアーム、４は球面頭部、５はアジャス
トスクリュー、８はキャップ、11はインサート部材、15
はキャップ本体である。FIG. 1 is a schematic view showing a preferred embodiment of the present invention, FIG. 2 is a detailed view of essential parts of FIG. 1, FIG. 3 is an analysis view showing relative movement between an adjusting screw and a cap, and FIG. It is the schematic which shows the rocker arm as a prior art example. In the figure, 1 is a rocker arm, 4 is a spherical head, 5 is an adjusting screw, 8 is a cap, 11 is an insert member, 15
Is the cap body.
Claims (1)
に弁棒の後端と当接されるキャップを揺動自在に嵌合す
る球面頭部を形成し、該頭部の先端が接する上記キャッ
プの内底を平滑面にしたことを特徴とするロッカアーム
の調整機構。1. A spherical head portion is formed at the tip of an adjusting screw of a rocker arm so that a cap abutting against a rear end of a valve rod is swingably fitted, and an inner bottom of the cap is in contact with the tip of the head portion. A rocker arm adjustment mechanism characterized by a smooth surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1166388U JPH07647Y2 (en) | 1988-01-30 | 1988-01-30 | Rocker arm adjustment mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1166388U JPH07647Y2 (en) | 1988-01-30 | 1988-01-30 | Rocker arm adjustment mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01115806U JPH01115806U (en) | 1989-08-04 |
| JPH07647Y2 true JPH07647Y2 (en) | 1995-01-11 |
Family
ID=31220416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1166388U Expired - Lifetime JPH07647Y2 (en) | 1988-01-30 | 1988-01-30 | Rocker arm adjustment mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07647Y2 (en) |
-
1988
- 1988-01-30 JP JP1166388U patent/JPH07647Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01115806U (en) | 1989-08-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4682575A (en) | Low friction high speed rocker arm | |
| JPH07647Y2 (en) | Rocker arm adjustment mechanism | |
| US4476822A (en) | Hypocyclic rolling contact rocker arm and pivot | |
| JPH0710004Y2 (en) | Rocker arm adjustment mechanism | |
| JPH0710003Y2 (en) | Rocker arm adjustment mechanism | |
| JPS58172409A (en) | Valve rocker device of internal-combustion engine | |
| JPH0727362Y2 (en) | Rocker arm adjustment mechanism | |
| JPH0746722Y2 (en) | Rocker arm adjustment mechanism | |
| JP3301514B2 (en) | Valve train | |
| JPS6131121Y2 (en) | ||
| JPH0610103Y2 (en) | Valve drive for internal combustion engine | |
| JP3985032B2 (en) | Variable valve mechanism | |
| JPS6132092Y2 (en) | ||
| JPH082404Y2 (en) | Internal combustion engine rocker arm | |
| JP2570479Y2 (en) | Valve drive for internal combustion engine | |
| US5803033A (en) | Valve drive apparatus for an internal combustion engine having a convex shim between a cam and a valve | |
| JPH0111924Y2 (en) | ||
| EP0777039B1 (en) | Valve drive apparatus for an internal combustion engine having a convex shim between a cam and a valve | |
| JP2004360564A (en) | Valve system for engine | |
| JP2514912B2 (en) | Engine valve gear | |
| JPS6111407A (en) | Tappet device of internal-combustion engine | |
| JPH0133773Y2 (en) | ||
| JPH11280417A (en) | Valve system mechanism for engine | |
| GB2206380A (en) | Axially movable camshaft valve gear | |
| JPH0324816Y2 (en) |