JPS641442Y2 - - Google Patents
Info
- Publication number
- JPS641442Y2 JPS641442Y2 JP19121582U JP19121582U JPS641442Y2 JP S641442 Y2 JPS641442 Y2 JP S641442Y2 JP 19121582 U JP19121582 U JP 19121582U JP 19121582 U JP19121582 U JP 19121582U JP S641442 Y2 JPS641442 Y2 JP S641442Y2
- Authority
- JP
- Japan
- Prior art keywords
- rocker arm
- sub
- arm
- valve
- screw
- 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
Links
- 238000013459 approach Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L2003/25—Valve configurations in relation to engine
- F01L2003/256—Valve configurations in relation to engine configured other than perpendicular to camshaft axis
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Description
【考案の詳細な説明】
本考案は燃焼室に放射状に配設されるバルブを
常にバルブステムの軸線に沿つて押圧できるよう
にバルブステムをロツカーアームと直交して揺動
するサブロツカーアームで押圧するようにしたエ
ンジンバルブの駆動装置に関する。[Detailed description of the invention] This invention uses a sub-rocker arm that swings perpendicularly to the rocker arm to press the valve stem so that the valves arranged radially in the combustion chamber can always be pressed along the axis of the valve stem. The present invention relates to an engine valve driving device as described above.
この種装置においてはロツカーアームはこれに
螺合したアジヤストスクリユーを介してサブロツ
カーアームに当接されているが、この場合スクリ
ユーの軸線とサブロツカーアームの当接面との交
る接触角が90゜を越すとアジヤストスクリユーの
受けるスラストの方向が左右に変化し、これがた
めロツカーアームのボス部の軸方向の間隙により
音を発生する。そしてこの音をおさえるため一般
にはばねによりロツカーアームを一方向に押し付
けているがばねの弾発方向にスラストが働くこと
を考えるとこのばねはかなりの弾発力が必要と
し、バルブ系のフリクシヨンロスを増大させる不
都合を存する。 In this type of device, the rocker arm is in contact with the sub-rotcher arm via an adjuster screw screwed onto it, but in this case, the contact angle between the axis of the screw and the contact surface of the sub-rotcher arm is If the angle exceeds 90 degrees, the direction of thrust received by the adjuster screw changes from side to side, which causes noise to be generated due to the axial gap between the boss portion of the rocker arm. In order to suppress this noise, a spring is generally used to push the Rotsuker arm in one direction, but considering that the thrust acts in the spring's direction of movement, this spring requires a considerable elastic force, which increases the friction loss of the valve system. There are some inconveniences.
本考案はかゝる不都合を改良することを目的と
したものでシリンダヘツドに、上方から見て平行
でない位置関係にある軸を介して揺動自在に軸支
されるサブロツカーアーム２とロツカーアーム３
とを設け、該ロツカーアーム３先端のアジヤスト
スクリユー４をサブロツカーアーム２に当接させ
ると共に、該サブロツカーアーム２を介してバル
ブステム１ｃを押圧するようにしたエンジンバル
ブの駆動装置において、前記アジヤストスクリユ
ー４が当接するサブロツカーアーム２の当接面２
ａを、外方に向つて直線状に上昇する傾斜面に形
成し、該傾斜面とアジヤストスクリユー４の軸線
との交わる外側の接触角αをバルブリフトの範囲
内で90゜以下に選定したことを特徴とする。 The present invention is aimed at improving such disadvantages, and includes a sub rocker arm 2 and a rocker arm 3 that are swingably supported on the cylinder head via shafts that are not parallel when viewed from above.
In the engine valve driving device, the adjusting screw 4 at the tip of the rocker arm 3 is brought into contact with the sub-rocker arm 2, and the valve stem 1c is pressed via the sub-rocker arm 2. Contact surface 2 of sub-locker arm 2 that adjuster screw 4 contacts
a is formed into an inclined surface that rises linearly outward, and the outer contact angle α where the inclined surface intersects with the axis of the adjusting screw 4 is selected to be 90° or less within the range of the valve lift. It is characterized by what it did.
図面は吸気バルブ１ａの２個と排気バルブ１
b2個とを一気筒に設けた４バルブエンジンを示
し、各バルブ１ａ，１ｂのバルブステム１ｃはそ
の端末にサブロツカーアーム２を当接させ、該ア
ーム２はロツカーアーム３に設けたアジヤストス
クリユー４を介してロツカーアーム３と連結さ
れ、各ロツカーアーム３はロツカーシヤフト５に
軸支されるボス部３ａにウエーブワツシヤ６を介
装してそのスラストを押えている。そして前記バ
ルブステム１ｃとサブロツカーアーム２とアジヤ
ストスクリユー４とは、第２図に示すようにアジ
ヤストスクリユー４の軸線ａとサブロツカーアー
ム２の当接面２ａとの交る接触角αが同図Ａに示
すようにバルブの閉鎖時と、同図Ｂに示すように
バルブの全開時とにおいて90゜以下におさえられ
るように選定したものである。 The drawing shows two intake valves 1a and exhaust valve 1.
The valve stem 1c of each valve 1a, 1b has a sub-rocker arm 2 in contact with its terminal end, and the arm 2 is connected to an adjusting screw provided on a rocker arm 3. Each rocker arm 3 is connected to a rocker arm 3 via a rocker shaft 5, and each rocker arm 3 has a wave washer 6 interposed in a boss portion 3a which is pivotally supported by a rocker shaft 5 to suppress the thrust thereof. As shown in FIG. 2, the valve stem 1c, the sub-locker arm 2 and the adjusting screw 4 have a contact angle at which the axis a of the adjusting screw 4 and the contact surface 2a of the sub-locker arm 2 intersect. It is selected so that α can be kept below 90° when the valve is closed, as shown in Figure A, and when the valve is fully open, as shown in Figure B.
図中、７はカムシヤフトを示し、該カムシヤフ
ト７の下部に前記ロツカーシヤフト５は設けられ
ている。 In the figure, 7 indicates a camshaft, and the rocker shaft 5 is provided below the camshaft 7.
このように本考案によるときはシリンダヘツド
に、上方から見て平行でない位置関係にある軸を
介して揺動自在に軸支されるサブロツカーアーム
２とロツカーアーム３とは、そのロツカーアーム
３のアジヤストスクリユー４が当接するサブロツ
カーアーム２の当接面２ａを外方に向つて直線状
に上昇する傾斜面に形成して、該傾斜面とアジヤ
ストスクリユー４の軸線との交わる外側の接触角
αをバルブリフトの範囲内で90゜以下に選定した
ものであるからバルブリフトの範囲内においてア
ジヤストスクリユー４の受けるスラスト方向の力
が零となりかくて、ロツカーアーム３のボス部３
ａの軸方向の間隙による音の発生をなくすことが
でき騒音対策上有利であり、而も外方に向つて直
線状に上昇する傾斜面とした当接面２ａはその加
工が容易であると共に、これと交差するアジヤス
トスクリユー４の接触角αの選定が容易となる等
の効果を有する。 In this way, according to the present invention, the sub-rocker arm 2 and the rocker arm 3, which are pivotally supported on the cylinder head through shafts that are not parallel when viewed from above, are arranged so that the sub-rocker arm 2 and the rocker arm 3 can swing freely. The abutment surface 2a of the sub-rocker arm 2, which the screw 4 abuts, is formed into an inclined surface that rises linearly outward, and the outer contact surface where the inclined surface intersects with the axis of the adjusting screw 4 is formed. Since the angle α is selected to be 90° or less within the valve lift range, the force in the thrust direction applied to the adjuster screw 4 approaches zero within the valve lift range, and the boss portion 3 of the rocker arm 3
It is advantageous in terms of noise control as it can eliminate the generation of sound due to the gap in the axial direction of a, and the abutment surface 2a, which is an inclined surface that rises linearly outward, is easy to process. , it is possible to easily select the contact angle α of the adjusting screw 4 that intersects with the adjusting screw 4.
図面は本考案の一実施例を示すもので第１図は
一部欠截平面図、第２図は要部の説明図である。
１ｃ……バルブステム、２……サブロツカーア
ーム、２ａ……当接面、３……ロツカーアーム、
４……アジヤストスクリユー。
The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway plan view, and FIG. 2 is an explanatory view of the main part. 1c...Valve stem, 2...Subrocker arm, 2a...Abutting surface, 3...Rotsker arm,
4...Asiast Screw.
Claims (1)
置関係にある軸を介して揺動自在に軸支されるサ
ブロツカーアーム２とロツカーアーム３とを設
け、該ロツカーアーム３先端のアジヤストスクリ
ユー４をサブロツカーアーム２に当接させると共
に、該サブロツカーアーム２を介してバルブステ
ム１ｃを押圧するようにしたエンジンバルブの駆
動装置において、前記アジヤストスクリユー４が
当接するサブロツカーアーム２の当接面２ａを、
外方に向つて直線状に上昇する傾斜面に形成し、
該傾斜面とアジヤストスクリユー４の軸線との交
わる外側の接触角αをバルブリフトの範囲内で
90゜以下に選定したことを特徴とするエンジンバ
ルブの駆動装置。 The cylinder head is provided with a sub-rocker arm 2 and a rocker arm 3 which are swingably supported via shafts that are not parallel when viewed from above, and the adjuster screw 4 at the tip of the rocker arm 3 is attached to the sub-rocker arm. In an engine valve driving device that is brought into contact with the arm 2 and presses the valve stem 1c via the sub-rocker arm 2, the contact surface 2a of the sub-rocker arm 2 that the adjuster screw 4 contacts is of,
Formed into a slope that rises in a straight line toward the outside,
The outer contact angle α where the inclined surface intersects with the axis of the adjusting screw 4 is set within the range of the valve lift.
An engine valve drive device characterized in that the angle is selected to be 90° or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19121582U JPS5996308U (en) | 1982-12-20 | 1982-12-20 | Engine valve drive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19121582U JPS5996308U (en) | 1982-12-20 | 1982-12-20 | Engine valve drive device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5996308U JPS5996308U (en) | 1984-06-29 |
| JPS641442Y2 true JPS641442Y2 (en) | 1989-01-13 |
Family
ID=30411822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19121582U Granted JPS5996308U (en) | 1982-12-20 | 1982-12-20 | Engine valve drive device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5996308U (en) |
-
1982
- 1982-12-20 JP JP19121582U patent/JPS5996308U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5996308U (en) | 1984-06-29 |
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