JPH0210243Y2 - - Google Patents
Info
- Publication number
- JPH0210243Y2 JPH0210243Y2 JP1986141157U JP14115786U JPH0210243Y2 JP H0210243 Y2 JPH0210243 Y2 JP H0210243Y2 JP 1986141157 U JP1986141157 U JP 1986141157U JP 14115786 U JP14115786 U JP 14115786U JP H0210243 Y2 JPH0210243 Y2 JP H0210243Y2
- Authority
- JP
- Japan
- Prior art keywords
- camshaft
- lubricating oil
- thrust
- oil
- groove
- 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
- 239000003921 oil Substances 0.000 claims description 50
- 239000010687 lubricating oil Substances 0.000 claims description 43
- 238000005461 lubrication Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims 1
- 238000005086 pumping Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、カムシヤフトの一端の支持部および
それを支持する端部軸受け部にカムシヤフトの軸
方向への移動を規制するためのスラスト溝及びス
ラストプレートを設けたカムシヤフトの潤滑構造
に関する。[Detailed Description of the Invention] (Field of Industrial Application) The present invention provides a thrust groove and a thrust groove for regulating the axial movement of the camshaft in the support part at one end of the camshaft and the end bearing part that supports it. The present invention relates to a lubrication structure for a camshaft provided with a plate.
（従来の技術）
従来より、この種のカムシヤフトの潤滑構造と
して、実開昭59−135307号公報に開示されている
ように、カムシヤフトの一端の支持部を回転自在
に支持する端部軸受け部と、上記支持部に該支持
部を一周して穿設された円環状のスラスト溝と、
上記支持部のカムシヤフト一端側に設けられ、動
弁室外部とのシールを行うオイルシールと上記端
部軸受け部と上記支持部とによつて仕切られて形
成されたオイル溜りと、上記円環状のスラスト溝
の側面の一部に嵌合され、先端が円環状のスラス
ト溝の底部に近接配置されて上記端部軸受け部に
固定され、上記カムシヤフトの軸方向への移動を
規制するスラストプレートと、上記端部軸受け部
を摺動する上記支持部の軸受摺動面であつて該ス
ラストプレートに対して反オイル溜り側軸受摺動
面のみへ潤滑油を圧送する潤滑油供給通路とを備
えたものは知られている。(Prior Art) Conventionally, as a lubrication structure for this type of camshaft, as disclosed in Japanese Utility Model Application Publication No. 59-135307, an end bearing part rotatably supports a support part at one end of the camshaft. , an annular thrust groove bored in the support part around the support part;
An oil seal provided on one end side of the camshaft of the support section for sealing with the outside of the valve train chamber; an oil reservoir partitioned by the end bearing section and the support section; a thrust plate that is fitted into a part of the side surface of the thrust groove, has a tip disposed close to the bottom of the annular thrust groove, is fixed to the end bearing portion, and restricts movement of the camshaft in the axial direction; A bearing sliding surface of the support part that slides on the end bearing part, and is provided with a lubricating oil supply passage that pumps lubricating oil only to the bearing sliding surface on the side opposite to the oil reservoir with respect to the thrust plate. is known.
一方、実開昭56−124204号公報には、カムジヤ
ーナル端部に形成されたオイル溜り室のオイルを
該オイル溜りの室外部に導くための潤滑油排出孔
をカムシヤフトのジヤーナル部に設けることによ
り、軸受け部を低圧にして軸受摺動面の軸受け部
へサイドフローするオイル量を増大させ、軸受摺
動面のオイル流動性を向上させる技術が開示され
ている。 On the other hand, Japanese Utility Model Application Publication No. 56-124204 discloses that a lubricating oil discharge hole is provided in the journal portion of the camshaft for guiding the oil in the oil reservoir chamber formed at the end of the cam shaft to the outside of the oil reservoir. , a technique has been disclosed for increasing the amount of oil that side-flows to the bearing portion of the bearing sliding surface by applying a low pressure to the bearing portion, thereby improving the fluidity of oil on the bearing sliding surface.
（考案が解決しようとする課題）
そこで、上記両者のスラスト溝及びスラストプ
レートを設けたカムシヤフトの潤滑構造に対し
て、その潤滑効果の向上を図るべく、上記後者の
技術を組合わせて簡単な構造でもつてスラスト溝
内の油圧を下げる方法として、スラスト溝と動弁
室空間とを連通する潤滑油排出孔を設けることが
考えられる。しかし、この場合、スラストプレー
トは、該スラストプレートとスラスト溝の側面と
の接触面圧が過剰に高くならないようにするた
め、スラストプレートの先端をスラスト溝の底部
に近接させて配置することが望ましい。(Problem to be solved by the invention) Therefore, in order to improve the lubrication effect of the camshaft lubrication structure provided with both of the above-mentioned thrust grooves and thrust plates, a simple structure was created by combining the latter technique. As a method of lowering the oil pressure in the thrust groove, it is conceivable to provide a lubricating oil discharge hole that communicates the thrust groove with the valve chamber space. However, in this case, in order to prevent the contact pressure between the thrust plate and the side surface of the thrust groove from becoming excessively high, it is desirable that the tip of the thrust plate be placed close to the bottom of the thrust groove. .
すなわち、このような構成にすると、上記潤滑
油排出孔は、そのスラスト溝の側面における開口
縁のシヤフト回転に伴う回転軌跡がスラストプレ
ートと重なる位置関係となる。従つて、この潤滑
油排出孔はスラストプレートによつて間欠的に塞
がれる結果、スラスト溝内の油圧が間欠的に高く
なつて油圧変動が生じる。この油圧変動によつ
て、オイル溜り側に油圧の上昇が生じて蓄圧さ
れ、その結果、潤滑油が外部に洩れるという新た
な問題が生じる。 That is, with such a configuration, the lubricating oil discharge hole has a positional relationship such that the rotation locus of the opening edge on the side surface of the thrust groove as the shaft rotates overlaps with the thrust plate. Therefore, this lubricating oil discharge hole is intermittently blocked by the thrust plate, and as a result, the oil pressure in the thrust groove becomes intermittently high, causing oil pressure fluctuations. Due to this oil pressure fluctuation, the oil pressure increases and is accumulated in the oil reservoir, and as a result, a new problem arises in that lubricating oil leaks to the outside.
本考案はかかる点に鑑みてなされたものであ
り、上記の動弁室空間と連通する潤滑油排出孔を
スラスト溝の側面に開口させ、かつこの潤滑油排
出孔を上記スラスト溝を経てオイル溜りまで延設
させることにより、容易な加工でもつて上記スラ
スト溝内の油圧を低下を図ることに加えて、オイ
ル溜りでの蓄圧をなくして潤滑油洩れを防止する
ことを目的とする。 The present invention has been made in view of the above points, and includes opening a lubricating oil discharge hole that communicates with the above-mentioned valve chamber space on the side surface of the thrust groove, and connecting this lubricating oil discharge hole to the oil reservoir through the above-mentioned thrust groove. By extending the length of the groove, the purpose is not only to reduce the oil pressure in the thrust groove with easy machining, but also to eliminate pressure accumulation in the oil reservoir and prevent lubricating oil leakage.
（課題を解決するための手段）
上記の目的を達成するため、本考案の解決手段
は、カムシヤフトの一端の支持部を回転自在に支
持する端部軸受け部と、上記支持部に該支持部を
一周して穿設された円環状のスラスト溝と、上記
支持部のカムシヤフト一端側に設けられ、動弁室
外部とのシールを行うオイルシールと上記端部軸
受け部と上記支持部とによつて仕切られて形成さ
れたオイル溜りと、上記円環状スラスト溝の側面
の一部に嵌合され、先端が円環状スラスト溝の底
部に近接配置されて上記端部軸受け部に固定さ
れ、上記カムシヤフトの軸方向への移動を規制す
るスラストプレートと、上記端部軸受け部を摺動
する上記支持部の軸受摺動面であつて該スラスト
プレートに対して反オイル溜り側軸受摺動面のみ
へ潤滑油を圧送する潤滑油供給通路とを備えたカ
ムシヤフトの潤滑構造を前提とする。そして、上
記支持部における上記オイル溜り側の端面と上記
スラスト溝のスラストプレート摺接面と上記動弁
室側の端面とのそれぞれに開口し、上記スラスト
溝を経て上記オイル溜りと動弁室空間とを直線的
に連通する潤滑油排出孔を、上記スラストプレー
ト摺接面内の上記潤滑油排出孔開孔縁の回転軌跡
が上記スラストプレートと重なるよう形成したも
のとする。(Means for Solving the Problems) In order to achieve the above object, the solution means of the present invention includes an end bearing portion that rotatably supports a support portion at one end of a camshaft, and a support portion that is attached to the support portion. An annular thrust groove drilled all around the camshaft, an oil seal provided at one end of the camshaft of the support section for sealing with the outside of the valve chamber, the end bearing section, and the support section. The partitioned oil reservoir is fitted into a part of the side surface of the annular thrust groove, and the tip is disposed close to the bottom of the annular thrust groove and is fixed to the end bearing part of the camshaft. Lubricating oil is applied only to the thrust plate that restricts movement in the axial direction and the bearing sliding surface of the support part that slides on the end bearing part, and which is on the side opposite to the oil reservoir with respect to the thrust plate. This assumes a camshaft lubrication structure equipped with a lubrication oil supply passage that pumps out lubrication oil. Openings are formed at the end face of the support portion on the oil reservoir side, the thrust plate sliding contact surface of the thrust groove, and the end face of the valve operating chamber side, and the oil reservoir and the valve operating chamber space are opened through the thrust groove. A lubricating oil discharge hole that communicates linearly with the thrust plate is formed such that the rotation locus of the opening edge of the lubricating oil discharge hole in the sliding contact surface of the thrust plate overlaps with the thrust plate.
（作用）
これにより、本考案では、潤滑油排出孔によつ
てスラスト溝からの潤滑油の排出が行われて該ス
ラスト溝内の油圧が低下するので、スラスト溝及
びスラストプレートへの潤滑油の供給がスムーズ
に行われて十分な潤滑がなされる。また、カムシ
ヤフト支持部の端部に形成されるオイル溜りとほ
ぼ大気圧に保たれる動弁室空間とが上記スラスト
溝を経て潤滑油排出孔によつて連通しているの
で、上記スラスト溝での潤滑油排出孔の間欠的閉
塞による油圧変動の影響でオイル溜りが高圧にな
つて潤滑油が外部へもれるということが防止され
る。(Function) As a result, in the present invention, the lubricating oil is discharged from the thrust groove by the lubricating oil discharge hole, and the oil pressure in the thrust groove is reduced, so that the lubricating oil is not discharged to the thrust groove and the thrust plate. Supply is carried out smoothly and sufficient lubrication is achieved. In addition, the oil reservoir formed at the end of the camshaft support portion and the valve train chamber space maintained at approximately atmospheric pressure are communicated through the thrust groove and the lubricating oil discharge hole. This prevents lubricating oil from leaking to the outside due to oil pressure fluctuations caused by intermittent blockage of the lubricating oil discharge hole.
（実施例）
以下、本考案の実施例を図面に沿つて説明す
る。(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図〜第３図において、シリンダヘツド１と
シリンダヘツドカバー１ａとで形成される動弁室
２には、タイミングベルト等を介してエンジン駆
動軸によつて駆動されるカムシヤト３が備えられ
ている。該カムシヤフト３は断面卵形のカム面３
ａを有しており、該カム面３ａは、カムシヤフト
３の左右斜め上方に該カムシヤフト３と平行に設
けたロツカーシヤフト４，５（第２図，第３図参
照）を軸として揺動回転するロツカーアーム（図
示せず）に当接しており、上記ロツカーアームの
揺動によつて吸排気弁が開閉するようになつてい
る。ロツカーシヤフト４の内部には、カムシヤフ
ト３に一体形成された支持部を回転自在に支持す
る軸受け部へ潤滑油を供給するための潤滑油供給
通路６が形成され、カムシヤフト３の一端に形成
された端部支持部７及びそれを支持する端部軸受
け部８へも潤滑油が供給される。 1 to 3, a valve chamber 2 formed by a cylinder head 1 and a cylinder head cover 1a is equipped with a camshaft 3 driven by an engine drive shaft via a timing belt or the like. There is. The camshaft 3 has a cam surface 3 having an oval cross section.
a, and the cam surface 3a is a rocker arm that swings and rotates around rocker shafts 4 and 5 (see FIGS. 2 and 3), which are provided diagonally above the left and right sides of the camshaft 3 and parallel to the camshaft 3. (not shown), and the intake and exhaust valves are opened and closed by the swinging of the rocker arm. A lubricating oil supply passage 6 is formed inside the rocker shaft 4 for supplying lubricating oil to a bearing portion that rotatably supports a support portion formed integrally with the camshaft 3. Lubricating oil is also supplied to the end support part 7 and the end bearing part 8 that supports it.
端部支持部７には、潤滑油供給通路６の端部軸
受部８からの開口部６ａに面して導油溝７ａが設
けられ、かつそれよりもカムシヤフト３の一端部
側に円環状のスラスト溝９及びオイル溜り１０が
設けられている。 The end support part 7 is provided with an oil guide groove 7a facing the opening 6a from the end bearing part 8 of the lubricating oil supply passage 6, and an annular groove 7a is provided on the one end side of the camshaft 3 from the oil guide groove 7a. A thrust groove 9 and an oil reservoir 10 are provided.
オイル溜り１０と動弁室２外部とはオイルシー
ル１１と外ぶた１２とで仕切られ、オイル溜り１
０と動弁室２内の空間とはスラスト溝９を経て直
線的に連通する潤滑油排出孔１３で連通してい
る。 The oil reservoir 10 and the outside of the valve train chamber 2 are separated by an oil seal 11 and an outer cover 12.
0 and the space within the valve train chamber 2 communicate with each other through a lubricating oil discharge hole 13 that communicates linearly through a thrust groove 9.
円環状スラスト溝９の側面の一部に嵌合するス
ラストプレート１４は、端部軸受け部８に設けら
れたスラストプレート挿入孔１５へ挿入されその
先端がスラスト溝９の底部に近接配置されて端部
軸受け部８にボルト締めにより固定されている。 The thrust plate 14, which fits into a part of the side surface of the annular thrust groove 9, is inserted into a thrust plate insertion hole 15 provided in the end bearing part 8, and its tip is placed close to the bottom of the thrust groove 9, and the end It is fixed to the bearing part 8 by bolting.
上記構成において、潤滑油供給通路６から導か
れた潤滑油は導油溝７ａで端部支持部７の全周へ
浸透し、動弁室２側へ浸透した潤滑油はそのまま
動弁室２へ流れ、その反対方向へ浸透した潤滑油
はスラスト溝９へ入る。 In the above configuration, the lubricating oil led from the lubricating oil supply passage 6 penetrates the entire circumference of the end support part 7 through the oil guiding groove 7a, and the lubricating oil that penetrates into the valve operating chamber 2 side directly flows into the valve operating chamber 2. The lubricating oil that flows and permeates in the opposite direction enters the thrust groove 9.
スラスト溝９内の潤滑油はその一部がオイル溜
り１０の方向へ供給され、残りはオイル溜り１０
から排出される潤滑油とともに潤滑油排出孔１３
を通つて動弁室２内の空間へ排出される。 A portion of the lubricating oil in the thrust groove 9 is supplied toward the oil reservoir 10, and the rest is supplied to the oil reservoir 10.
The lubricating oil discharge hole 13 along with the lubricating oil discharged from
It is discharged to the space inside the valve train chamber 2 through the valve train chamber 2.
従つて、スラスト溝９とスラストプレート１４
間の潤滑を行う潤滑油が潤滑油供給通路６から
次々と供給され、十分な潤滑が行われる。 Therefore, the thrust groove 9 and the thrust plate 14
Lubricating oil for lubrication between the parts is successively supplied from the lubricating oil supply passage 6, and sufficient lubrication is achieved.
また、カムシヤフト３の回転に伴うスラスト溝
９内の油圧の変動によつてオイル溜り１０が蓄圧
により高圧になることが防止され、オイルシール
１１を越えて潤滑油が外部へしみ出すことがな
い。 Further, the oil reservoir 10 is prevented from becoming high pressure due to pressure accumulation due to fluctuations in the oil pressure in the thrust groove 9 as the camshaft 3 rotates, and lubricating oil does not leak out beyond the oil seal 11.
更に、潤滑油排出孔１３を形成するに際して
は、穴あけ加工が１度ですむ上、カムシヤフト３
の端部からの穴あけ加工であるため作業が非常に
簡単である。 Furthermore, when forming the lubricating oil discharge hole 13, drilling is only required once, and the camshaft 3
The work is very easy as the hole is drilled from the end of the hole.
（考案の効果）
以上説明したように本考案は、スラスト溝を設
けたカムシヤフトの一端の支持部に、カムシヤフ
トの一端側に設けられたオイル溜りと動弁室空間
とを上記スラスト溝を経て直線的に連通する潤滑
油排出孔を設けたことにより、軸受摺動面からス
ラスト溝へサイドフローする潤滑油量の増大によ
る軸受摺動面の潤滑を良好に確保しながら、該ス
ラスト溝内の油圧の変動によるオイル溜りの蓄圧
をなくしてオイル溜りから外部へのオイル洩れを
防止することができる。(Effect of the invention) As explained above, the present invention connects the oil reservoir provided at one end of the camshaft and the valve chamber space to the support part of one end of the camshaft provided with the thrust groove in a straight line through the thrust groove. By providing a lubricating oil discharge hole that communicates with the thrust groove, the amount of lubricating oil side-flowing from the bearing sliding surface to the thrust groove increases, ensuring good lubrication of the bearing sliding surface, while reducing the hydraulic pressure in the thrust groove. By eliminating pressure buildup in the oil reservoir due to fluctuations in the oil pressure, it is possible to prevent oil leakage from the oil reservoir to the outside.
更に、これらの効果を得るための加工がカムシ
ヤフト端部からの１つの穴あけのみの簡単な加工
ですむという効果も発揮される。 Furthermore, the advantage is that the processing required to obtain these effects is as simple as drilling only one hole from the end of the camshaft.
第１図〜第３図は本考案の実施例を示し、第１
図はカムシヤフト端部付近の断面図、第２図は第
１図における−断面図、第３図は第１図の部
分を上から見た図である。
２……動弁室、３……カムシヤフト、６……潤
滑油供給通路、７……端部支持部、８……端部軸
受け部、９……スラスト溝、１０……オイル溜
り、１１……オイルシール、１３……潤滑油排出
孔、１４……スラストプレート。
Figures 1 to 3 show embodiments of the present invention;
2 is a cross-sectional view of the vicinity of the end of the camshaft, FIG. 2 is a cross-sectional view taken from FIG. 1, and FIG. 3 is a view of the portion shown in FIG. 1 viewed from above. 2... Valve train chamber, 3... Camshaft, 6... Lubricating oil supply passage, 7... End support section, 8... End bearing section, 9... Thrust groove, 10... Oil reservoir, 11... ...Oil seal, 13...Lubricating oil discharge hole, 14...Thrust plate.
Claims (1)
する端部軸受け部と、上記支持部に該支持部を一
周して穿設された円環状のスラスト溝と、上記支
持部のカムシヤフト一端側に設けられ、動弁室外
部とのシールを行うオイルシールと上記端部軸受
け部と上記支持部とによつて仕切られて形成され
たオイル溜りと、上記円環状スラスト溝の側面の
一部に嵌合され、先端が円環状スラスト溝の底部
に近接配置されて上記端部軸受け部に固定され、
上記カムシヤフトの軸方向への移動を規制するス
ラストプレートと、上記端部軸受け部を摺動する
上記支持部の軸受摺動面であつて該スラストプレ
ートに対して反オイル溜り側軸受摺動面のみへ潤
滑油を圧送する潤滑油供給通路とを備えたカムシ
ヤフトの潤滑構造において、 上記支持部における上記オイル溜り側の端面と
上記スラスト溝のスラストプレート摺接面と上記
動弁室側の端面とのそれぞれに開口し、上記スラ
スト溝を経て上記オイル溜りと動弁室空間とを直
線的に連通する潤滑油排出孔を、上記スラストプ
レート摺接面内の上記潤滑油排出孔開孔縁の回転
軌跡が上記スラストプレートと重なるよう形成し
たことを特徴とするカムシヤフトの潤滑構造。[Claims for Utility Model Registration] An end bearing portion that rotatably supports a support portion at one end of a camshaft, an annular thrust groove drilled in the support portion so as to go around the support portion, and the support portion. An oil reservoir is provided at one end of the camshaft shaft and is partitioned by an oil seal for sealing with the outside of the valve chamber, the end bearing part and the support part, and the annular thrust groove. is fitted into a part of the side surface, and the tip is arranged close to the bottom of the annular thrust groove and fixed to the end bearing part,
A thrust plate that restricts the movement of the camshaft in the axial direction, and a bearing sliding surface of the support portion that slides on the end bearing portion, and only the bearing sliding surface on the side opposite to the oil reservoir with respect to the thrust plate. In the lubrication structure of the camshaft, the lubricating oil supply passage is provided with a lubricating oil supply passage for pumping lubricating oil to the camshaft. A lubricating oil discharge hole that opens in each of the holes and linearly communicates the oil reservoir and the valve train space through the thrust groove is connected to a rotation locus of the opening edge of the lubricant oil discharge hole in the sliding surface of the thrust plate. A camshaft lubrication structure characterized in that the camshaft is formed so as to overlap with the thrust plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986141157U JPH0210243Y2 (en) | 1986-09-12 | 1986-09-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986141157U JPH0210243Y2 (en) | 1986-09-12 | 1986-09-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6346616U JPS6346616U (en) | 1988-03-29 |
| JPH0210243Y2 true JPH0210243Y2 (en) | 1990-03-14 |
Family
ID=31048686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986141157U Expired JPH0210243Y2 (en) | 1986-09-12 | 1986-09-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0210243Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006041918A1 (en) * | 2006-09-07 | 2008-03-27 | Mahle International Gmbh | Adjustable camshaft |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56124204U (en) * | 1980-02-22 | 1981-09-21 | ||
| JPS5967509U (en) * | 1982-10-27 | 1984-05-08 | 本田技研工業株式会社 | Camshaft bearing device in internal combustion engine |
-
1986
- 1986-09-12 JP JP1986141157U patent/JPH0210243Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6346616U (en) | 1988-03-29 |
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