JPS6244129B2 - - Google Patents
Info
- Publication number
- JPS6244129B2 JPS6244129B2 JP53139151A JP13915178A JPS6244129B2 JP S6244129 B2 JPS6244129 B2 JP S6244129B2 JP 53139151 A JP53139151 A JP 53139151A JP 13915178 A JP13915178 A JP 13915178A JP S6244129 B2 JPS6244129 B2 JP S6244129B2
- Authority
- JP
- Japan
- Prior art keywords
- rocker arm
- shaft
- receiving plate
- bearing
- shafts
- 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
- 210000005069 ears Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、内燃機関の吸排気弁作動用のロツカ
アームを支持するロツカアーム軸と該ロツカアー
ムの作動用カム軸の抜け止め装置であつて、特に
前記２軸の軸受部端面が段差を有するものにおけ
る軸の抜け止め装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is a locking arm shaft that supports a rocker arm for operating intake and exhaust valves of an internal combustion engine, and a locking arm shaft and a camshaft for operating the rocker arm. The present invention relates to a shaft slip-off prevention device in which the end faces of the two shaft bearing portions have a step.
エンジン軽量化の為にロツカアーム軸をできる
だけ短くすることが行われ、その結果、前記２軸
の軸受部端面に段差が生じているものがある。そ
のようなものにおいて、従来は１枚の受板を前記
２軸の軸受部端面のいずれか一方の面でシリンダ
ヘツドにボルトで止着していたが、各軸に対して
十分な押さえ力を有する為に前記受板の板厚を大
きくする必要があつた。
In order to reduce the weight of the engine, the rocker arm shafts are made as short as possible, and as a result, there are some models where a step is formed on the end faces of the bearing portions of the two shafts. In such devices, conventionally a single receiving plate was fixed to the cylinder head on one of the end faces of the two shaft bearings with bolts, but sufficient pressing force was required for each shaft. Therefore, it was necessary to increase the thickness of the receiving plate.
ところが、このようにすると前記受板の板厚が
増加することから重量増加をもたらすという不具
合があつた。
However, when doing this, there was a problem in that the thickness of the receiving plate increased, resulting in an increase in weight.
本発明は、このような事情に鑑みなされたもの
で、エンジンの軽量化がはかれるロツカアーム軸
とカム軸の抜け止め装置を提供するものである。
本発明に係る軸の抜け止め装置は、シリンダヘツ
ド側壁に吸排気弁作動用ロツカアームを支持する
ロツカアーム軸と前記ロツカアーム作動用カム軸
とが平行に軸支され、前記カム軸軸受部端面は前
記ロツカアーム軸軸受部端面より外方に段差を有
し、かつ該端部にスプロケツトを有するものにお
いて、前記２軸をそれぞれの軸受部端面で一枚の
受板によつて押さえると共に、前記２軸の軸受部
端面の中間に前記端面と平行な段面を設け、前記
受板をシリンダヘツドに前記段面でボルトにて止
着させるようにしたものである。
The present invention has been made in view of the above circumstances, and provides a locking arm shaft and camshaft retaining device that can reduce the weight of an engine.
In the shaft retaining device according to the present invention, a rocker arm shaft supporting a rocker arm for operating an intake/exhaust valve and a camshaft for operating the rocker arm are supported in parallel on a side wall of a cylinder head, and the end surface of the cam shaft bearing portion is connected to the rocker arm. In a shaft having a step outward from the end face of the bearing part and having a sprocket at the end part, the two shafts are held down by a single receiving plate at the end face of each bearing part, and the bearings of the two shafts are A stepped surface parallel to the end surface is provided in the middle of the end surface of the cylinder, and the receiving plate is fixed to the cylinder head at the stepped surface with bolts.
本発明においては、前記受板をシリンダヘツド
へ止着している段面と前記２軸の軸受部端面との
段差をそれぞれ一方が長くなることなくできるの
で前記受板の板厚を必要以上に厚くすることがな
い。
In the present invention, the step between the stepped surface that fixes the receiving plate to the cylinder head and the end surface of the bearing portion of the two shafts can be made without making one of them longer, so that the thickness of the receiving plate can be increased more than necessary. It doesn't have to be thick.
本発明の実施例を自動二輪車用４サイクルエン
ジンのロツカアーム軸とカム軸の抜け止めについ
て図面により説明すれば、第１図と第２図におい
てａはシリンダ、ｂはヘツドカバーを一体成形し
てカム軸、ロツカアーム等を収納する作動室b′を
設けたシリンダヘツド、ｃは気化器、１はカム
軸、２，２′はロツカアーム軸、３，３′はロツカ
アーム、１０は吸気通路、１０′は排気通路、１
１は吸気弁、１１′は排気弁である。
An embodiment of the present invention will be explained with reference to the drawings to prevent the rocker arm shaft and camshaft of a four-cycle engine for motorcycles from coming off. In FIGS. , a cylinder head with a working chamber b' for housing rocker arms, etc., c is a carburetor, 1 is a camshaft, 2, 2' are rocker arm shafts, 3, 3' are rocker arms, 10 is an intake passage, 10' is an exhaust passage, 1
1 is an intake valve, and 11' is an exhaust valve.
シリンダヘツドｂは作動室b′の一側面を構成す
る側壁b1の外方にスプロケツトケース１２が形成
され、該ケース１２は側面カバー１３によつて覆
われる。 The cylinder head b has a sprocket case 12 formed outside a side wall b1 constituting one side of the working chamber b', and the case 12 is covered with a side cover 13.
上記作動室b′内には前記側壁b1側より前記カム
軸１とロツカアーム軸２，２′を挿入し横架せし
め、そのカム軸１は略中央に、ロツカアーム軸
２，２′はカム軸１上の前後対称位置にそれぞれ
支持させる。 The camshaft 1 and the rocker arm shafts 2, 2' are inserted into the working chamber b' from the side wall b1 side and are suspended horizontally, with the camshaft 1 being approximately in the center and the rocker arm shafts 2, 2' being the camshafts. 1. Support them at symmetrical positions on the front and rear.
上記シリンダヘツドｂはその側壁b1に前記各軸
１と２，２′を挿入する軸孔１４と１５，１５′を
開口すると共に側壁b1と反対側の側壁b2にそれぞ
れ軸受部１６と１７，１７′を一体に突出させ
る。上記側壁b1はその中央に突出したボス部４に
軸孔１４を開口し、軸孔１５，１５′を軸孔１４
開口面より窪んだ位置に開口する。 The cylinder head b has shaft holes 14, 15, 15' in its side wall b 1 into which the shafts 1, 2, 2 ' are inserted, and bearing portions 16 in its side wall b 2 opposite to the side wall b 1. 17 and 17' are made to protrude as one. The side wall b 1 has a shaft hole 14 opened in the boss portion 4 protruding from the center thereof, and shaft holes 15 and 15' are connected to the shaft hole 14.
The opening is recessed from the opening surface.
カム軸１は前記軸孔１４と軸受部１６に渉り挿
着し、その軸受部１６側はロールベアリング１８
を介して回動自在に支持させ、軸孔１４側は軸方
向に係着するボールベアリング１９を介して軸孔
１４に回動自在に支持させると共に外端をスプロ
ケツトケース１２に突出させ該突出端にスプロケ
ツト２０を取付一体的に固定する。 The camshaft 1 is inserted into the shaft hole 14 and the bearing part 16, and the roll bearing 18 is mounted on the bearing part 16 side.
The shaft hole 14 side is rotatably supported in the shaft hole 14 through a ball bearing 19 that engages in the axial direction, and the outer end projects into the sprocket case 12. A sprocket 20 is attached to the end and fixed integrally.
ロツカアーム軸２，２′は前記軸孔１５，１
５′と軸受部１７，１７′に渉りそれぞれ挿着し、
各軸２，２′にそれぞれロツカアーム３，３′を回
動自在に軸支させる。上記カム軸１のベアリング
１９とロツカアーム軸１５，１５′の外端はそれ
ぞれ軸孔１４と１５，１５′の外端面にそれぞれ
面一となるようにする。 The rocker arm shafts 2, 2' are in the shaft holes 15, 1.
5' and the bearing parts 17, 17' and insert them respectively,
A rocker arm 3, 3' is rotatably supported on each shaft 2, 2'. The bearing 19 of the camshaft 1 and the outer ends of the rocker arm shafts 15, 15' are flush with the outer end surfaces of the shaft holes 14 and 15, 15', respectively.
尚、図面の２１はカム軸１に一体に形成したタ
コメータ用ギヤ、２２は前記ギヤ２１のベアリン
グ面を支持するブツシユ、２３は前記ブツシユ２
２に掛け止めてその抜け止めと回転止めをするボ
ルト、２４はカム軸のカムを挿通させるために軸
孔１４を部分的に拡大させた逃げ部である。 In addition, 21 in the drawing is a tachometer gear formed integrally with the camshaft 1, 22 is a bushing that supports the bearing surface of the gear 21, and 23 is the bushing 2.
The bolt 24 is hooked onto the shaft hole 14 to prevent it from coming off and rotating, and the shaft hole 14 is partially enlarged in order to allow the cam of the camshaft to pass therethrough.
シリンダヘツドｂはその側壁b1に受板５を取付
てカム軸１とロツカアーム軸２の抜け止めをする
ようにする。 A receiving plate 5 is attached to the side wall b1 of the cylinder head b to prevent the camshaft 1 and rocker arm shaft 2 from coming off.
側壁b1は前記軸孔１４と１５の下部近傍にボス
部４より若干突出量の小さい取付ボス６，６′を
形成し、該ボス６，６′に受板５をそれぞれボル
ト７，７′でもつて止着する。 The side wall b 1 has mounting bosses 6 and 6' formed near the lower portions of the shaft holes 14 and 15, which protrude slightly smaller than the boss portion 4, and the receiving plate 5 is attached to the bosses 6 and 6' with bolts 7 and 7', respectively. But it sticks and stops.
受板５は前記ボス部４の略1/4円周区間を側面
から端面に沿いＬ形に屈曲させた第１係合部５
と、その左右各端を前記取付ボス６，６′上まで
延長させた取付耳５２，５2′と、一方の取付耳５
２よりさらにＬ形に屈曲させて先端を窪んだ位置
にある軸孔１５にのぞませた第２係合部５３とか
ら成る形状に成形した一枚板である。 The receiving plate 5 has a first engaging portion 5 which is formed by bending approximately 1/4 circumferential section of the boss portion 4 into an L shape from the side surface to the end surface.
, mounting ears 5 2 , 5 2 ′ whose left and right ends extend above the mounting bosses 6 , 6 ′ , and one mounting ear 5 .
It is a single plate formed into a shape consisting of a second engaging part 53 which is bent further into an L shape than the second engaging part 53 , and the tip thereof faces into the shaft hole 15 in a recessed position.
上記第１係合部５１はその先端をボス部４端面
と面一のベアリング１９端面外周部まで突出させ
て、該ベアリング１９端面に当接するようにし、
第２係合部５３はその先端縁がロツカアーム軸２
端面に当接するようにする。そして、上記受板５
の取付耳５２，５2′を側壁b1の取付ボス６，６′
に合わせて位置決めし、各耳５，５′をボルト
７，７′でもつてボス６，６′に止着することによ
つて、第１係合部５がベアリング１９に係合し該
ベアリングに軸方向に係着するカム軸１の抜け止
めがなされると共に、第２係合部５がロツカアー
ム軸２の端面に係合して該軸２の抜け止めがなさ
れる（第２図〜第４図）。尚、他方のロツカアー
ム軸２′はシリンダヘツドｂをシリンダａに締結
させるスタツドボルト８によつて抜け止めをする
ようにしてある（第３図、第５図）。 The first engaging portion 51 has its tip projected to the outer periphery of the end surface of the bearing 19 flush with the end surface of the boss portion 4 so as to come into contact with the end surface of the bearing 19,
The second engaging portion 53 has its tip edge connected to the rocker arm shaft 2.
Make sure it touches the end surface. Then, the receiving plate 5
Mounting ears 5 2 , 5 2 ′ of mounting bosses 6 , 6 ′ of side wall b 1
By positioning the ears 5, 5' to the bosses 6, 6' with bolts 7, 7', the first engaging part 5 engages with the bearing 19, and the first engaging part 5 engages with the bearing 19. The camshaft 1 that engages in the axial direction is prevented from coming off, and the second engaging portion 5 engages with the end surface of the rocker arm shaft 2 to prevent the shaft 2 from coming off (see Figs. 2 to 4). figure). The other rocker arm shaft 2' is prevented from coming off by a stud bolt 8 which fastens the cylinder head b to the cylinder a (FIGS. 3 and 5).
以上、説明したように本発明によれば、シリン
ダヘツド側壁に吸排気弁作動用ロツカアームを支
持するロツカアーム軸と前記ロツカアーム作動用
カム軸とが平行に軸支され、前記カム軸軸受部端
面は前記ロツカアーム軸軸受部端面より外方に段
差を有し、かつ該端部にスプロケツトを有するも
のにおいて、前記２軸をそれぞれの軸受部端面で
一枚の受板によつて押さえると共に、前記２軸の
軸受部端面の中間に前記端面と平行な段面を設
け、前記受板をシリンダヘツドに前記段面でボル
トにて止着させるようにしたので、スプロケツト
に前記ボルトが当たることがないと共に、前記２
軸を前記受板の厚みを厚くすることなく１枚の受
板で押さえることが可能となる。
As described above, according to the present invention, the rocker arm shaft that supports the rocker arm for operating the intake and exhaust valves and the rocker arm operating cam shaft are supported in parallel on the side wall of the cylinder head, and the end surface of the cam shaft bearing portion is In a rocker arm shaft having a step outward from the end face of the bearing part and having a sprocket at the end part, the two shafts are held down by a single receiving plate at the end face of each bearing part, and the two shafts are A stepped surface parallel to the end surface is provided in the middle of the end surface of the bearing part, and the receiving plate is fixed to the cylinder head at the stepped surface with bolts, so that the bolts do not hit the sprocket and the bolts do not hit the sprocket. 2
It becomes possible to hold the shaft with one receiving plate without increasing the thickness of the receiving plate.
第１図は４サイクルエンジンのシリンダヘツド
部分を示す縦断側面図、第２図はその中央縦断面
図、第３図は第２図の−線断面図、第４図は
第３図の−線断面図、第５図は同−線断
面図である。
図中、ｂはシリンダヘツド、１はカム軸、２，
２′はロツカアーム軸、５は受板、５１は第１係
合部、５２，５2′は取付耳、５３は第２係合部、
１９はボールベアリングである。
Figure 1 is a vertical side view showing the cylinder head portion of a four-cycle engine, Figure 2 is a central longitudinal sectional view, Figure 3 is a cross-sectional view taken along the - line in Figure 2, and Figure 4 is a - line in Figure 3. A sectional view, FIG. 5 is a sectional view taken along the same line. In the figure, b is the cylinder head, 1 is the camshaft, 2,
2' is a rocker arm shaft, 5 is a receiving plate, 51 is a first engaging part, 52 , 52 ' is a mounting lug, 53 is a second engaging part,
19 is a ball bearing.
Claims (1)
アームを支持するロツカアーム軸と前記ロツカア
ーム作動用カム軸とが平行に軸支され、前記カム
軸軸受部端面は前記ロツカアーム軸軸受部端面よ
り外方に段差を有し、かつ該端部にスプロケツト
を有するものにおいて、前記２軸をそれぞれの軸
受部端面で一枚の受板によつて押さえると共に、
前記２軸の軸受部端面の中間に前記端面と平行な
段面を設け、前記受板をシリンダヘツドに前記段
面でボルトにて止着させることを特徴とする軸の
抜け止め装置。1. A rocker arm shaft that supports a rocker arm for operating the intake and exhaust valves and the rocker arm operating camshaft are supported in parallel on the side wall of the cylinder head, and the end surface of the cam shaft bearing portion has a step outwardly from the end surface of the rocker arm shaft bearing portion. and a sprocket at the end thereof, wherein the two shafts are held down by a single receiving plate at the end face of each bearing part, and
A shaft retaining device characterized in that a stepped surface parallel to the end surface is provided between the end surfaces of the bearing portions of the two shafts, and the receiving plate is fixed to the cylinder head at the stepped surface with a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13915178A JPS5565713A (en) | 1978-11-10 | 1978-11-10 | Shaft retaining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13915178A JPS5565713A (en) | 1978-11-10 | 1978-11-10 | Shaft retaining device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5565713A JPS5565713A (en) | 1980-05-17 |
| JPS6244129B2 true JPS6244129B2 (en) | 1987-09-18 |
Family
ID=15238742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13915178A Granted JPS5565713A (en) | 1978-11-10 | 1978-11-10 | Shaft retaining device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5565713A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57109207U (en) * | 1980-12-25 | 1982-07-06 | ||
| JPS6054704U (en) * | 1983-09-20 | 1985-04-17 | ダイハツ工業株式会社 | engine camshaft |
| JPS6058922U (en) * | 1983-09-28 | 1985-04-24 | 日本ピストンリング株式会社 | shaft member |
| JP2652852B2 (en) * | 1987-02-12 | 1997-09-10 | ヤマハ発動機株式会社 | Valve train for 4-cycle engine |
| JP4133713B2 (en) * | 2003-04-01 | 2008-08-13 | 本田技研工業株式会社 | Cylinder head of internal combustion engine |
| JP5362508B2 (en) * | 2009-09-29 | 2013-12-11 | 本田技研工業株式会社 | Cam sprocket fastening structure |
| DE102018210032A1 (en) * | 2018-06-20 | 2019-12-24 | Mahle International Gmbh | One-piece camshaft tube |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS492023U (en) * | 1972-04-06 | 1974-01-09 |
-
1978
- 1978-11-10 JP JP13915178A patent/JPS5565713A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS492023U (en) * | 1972-04-06 | 1974-01-09 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5565713A (en) | 1980-05-17 |
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