JPS60175712A - Hydraulic valve lifter for overhead cam type engine - Google Patents
Hydraulic valve lifter for overhead cam type engineInfo
- Publication number
- JPS60175712A JPS60175712A JP3118084A JP3118084A JPS60175712A JP S60175712 A JPS60175712 A JP S60175712A JP 3118084 A JP3118084 A JP 3118084A JP 3118084 A JP3118084 A JP 3118084A JP S60175712 A JPS60175712 A JP S60175712A
- Authority
- JP
- Japan
- Prior art keywords
- cap
- cylindrical portion
- cylinder
- body portion
- lifter
- 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.)
- Pending
Links
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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/245—Hydraulic tappets
- F01L1/25—Hydraulic tappets between cam and valve stem
-
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L1/053—Camshafts overhead type
- F01L1/0532—Camshafts overhead type the cams being directly in contact with the driven valve
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
内ｍ機関の動弁機構に組み込まれ、特にオーバーへラド
カム型内燃機関に使用される油圧パルグリフタに関する
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydraulic pulse lifter which is incorporated into a valve train of an industrially used engine, and which is particularly used in an over-rad cam type internal combustion engine.
従来技術
オーバーへラドカム（ＯＨＣ）型内燃機関で、特釦ロッ
カアー五等を用いることな（吸・排気紳の弁棒の上にパ
ルプリフタを置きその上にカムシャフトに取りつけたカ
ムに接触させ、カムによシ吸・徘ｇＩＣ升を直接駆動す
るように構成した内燃機関の動弁機構は、摩耗や熱膨張
の影響を受け易く、その為にパルプリフタとカムとの間
隙が運転中に変化する。このように、間隙が変化しても
、その間隙を適切に補正する装置として油圧パルプリフ
タが設けられている。Conventional technology: In overdrive cam (OHC) type internal combustion engines, special button rockers, etc. are not used. The valve mechanism of an internal combustion engine configured to directly drive an IC cell is susceptible to wear and thermal expansion, and as a result, the gap between the pulp lifter and the cam changes during operation. In this way, even if the gap changes, the hydraulic pulp lifter is provided as a device for appropriately correcting the gap.
そして、従来公知の油圧パルプリフタ５１は第３図に示
すように、内燃機関のｙリンダヘッド１４に設けたガイ
ド孔１４ａに対して摺動する本体部５２と、カム１５と
摩擦接触するキャップ部５３とが１体構造で形成されて
いた。そして、シリンダヘッド１４のガイド孔１４ａと
摺動する本体部５２内にあるプランジャ５４０油室５５
に油を供給するための環状油溝５６を、本体部５２の外
周又ｔｒｉｔｙリンダヘッド１４のガイド孔１１のどち
らかに設ける必要があった。又、カム１５と摩擦接触す
るキャップ部５３には強い摩擦力が作用するため、キャ
ップ部５３の材料としては耐摩耗性の高いことが必要で
あるが、本体部５２はキャップ部５６程にｒ＃摩耗性を
必要としない。併し、従来は的述のように本体部５２と
キャップ部５３とが一体構造であるため、両者は耐摩耗
性の高い材料で製作されていた。一方、油圧パルプリフ
タ５１を使用するエンジンはロッカアーム等を除いたダ
イレクト駆動式である為、回転数の高いエンジンとして
設肚されている。従って、油圧パルプリフタとしては、
軽量であることが必要であるが、従来の一体式油圧バル
プリフタでは十分に軽量化されていないという欠点があ
った。As shown in FIG. 3, the conventionally known hydraulic pulp lifter 51 includes a main body portion 52 that slides against a guide hole 14a provided in the Y cylinder head 14 of an internal combustion engine, and a cap portion 53 that makes frictional contact with the cam 15. It was formed as a single structure. A plunger 540 and an oil chamber 55 in the main body 52 that slide with the guide hole 14a of the cylinder head 14 are provided.
It was necessary to provide an annular oil groove 56 for supplying oil to either the outer periphery of the main body portion 52 or the guide hole 11 of the trity cylinder head 14. Further, since a strong frictional force acts on the cap portion 53 that makes frictional contact with the cam 15, the material of the cap portion 53 must have high wear resistance. # Does not require abrasiveness. However, in the past, as described above, the main body part 52 and the cap part 53 had an integral structure, and therefore both were made of a material with high wear resistance. On the other hand, since the engine using the hydraulic pulp lifter 51 is a direct drive type excluding a rocker arm, etc., it is installed as an engine with a high rotation speed. Therefore, as a hydraulic pulp lifter,
Although it is necessary to be lightweight, conventional integrated hydraulic valve lifters have the drawback of not being sufficiently lightweight.
発明の目的
この発明は上記にかんがみ、本体部の外周部又はシリン
ダヘッドのガイド孔部に、油を本体部内に導くための環
状の油溝を設ける必要がなく、又本体部とキャップ部と
を異種金属とするとともに、全体の重量を軽量化するこ
とのできる油圧パルプリフタの提供を目的とするもので
ある。Purpose of the Invention In view of the above, the present invention eliminates the need to provide an annular oil groove on the outer periphery of the main body or the guide hole of the cylinder head for guiding oil into the main body, and also eliminates the need to provide an annular oil groove between the main body and the cap. The object of the present invention is to provide a hydraulic pulp lifter that is made of different metals and that can reduce the overall weight.
発明の構成
上記の目的を達成するため、この発明の構成は次のよう
になされる。すなわち、有底円筒状のシリンダと、この
シリンダ内に摺動可能に収容され、連通孔を有する隔壁
の上部に油室を、又隔壁の下部で前記シリンダとの間に
高圧室を形成するプランジャと、！１］ｆｉ３高圧室内
に設けられてプランジャの連通孔を閉じるチェック弁と
を有し、かつシリンダヘッドのガイド孔に摺動自在に収
容されて、カムと吸・排ｇＫ弁のパルプステムとの間に
位置するオーバーへラドカム型内燃機関の油圧パルプリ
フタを、シリンダヘッドのガイド孔に対して摺動可能な
円筒部とこの円筒部の上面を閉鎖する頂板とを有しこの
頂板がＵ紀カムに当接するキャップと、前記プランジャ
を収容したシリンダを摺動可能に収容する上部円筒部と
前記ガイド孔に対して摺動可能な下部円筒部とを有し前
記キャップの下方に位置する本体部とから形成し、この
本体部の下部円筒部の上端をキャップの円筒部下端との
間に環状の隙間を形成している。Structure of the Invention In order to achieve the above object, the structure of the present invention is as follows. That is, a cylindrical cylinder with a bottom, and a plunger that is slidably housed in the cylinder and forms an oil chamber in the upper part of a partition wall having a communication hole, and a high pressure chamber between the cylinder and the lower part of the partition wall. and,! 1] It has a check valve that is installed in the fi3 high pressure chamber and closes the communication hole of the plunger, and is slidably accommodated in the guide hole of the cylinder head, and is between the cam and the pulp stem of the suction/exhaust gK valve. The hydraulic pulp lifter of the Over-Rad cam type internal combustion engine, which is located at It is formed of a cap in contact with the cap, and a main body portion positioned below the cap and having an upper cylindrical portion that slidably accommodates a cylinder that accommodates the plunger, and a lower cylindrical portion that is slidable with respect to the guide hole. However, an annular gap is formed between the upper end of the lower cylindrical portion of the main body and the cylindrical lower end of the cap.
実施例
つぎに、この発明を図面に示す実施例に基づいて説明す
る。Embodiments Next, the present invention will be explained based on embodiments shown in the drawings.
第１図において、ＯＨＣタイプの内燃機関（以下エンジ
ンともいう。）の油圧パルグリフタ１にはキャップ２と
本体部３とがある。キャップ２は円筒部２ａとこの円筒
部２ａの上端を閉鎖する頂板に
上方には下部円筒部６＆と同軸で２５一つ下部円筒部３
ａより小さな直径を有する上部円筒部６ｂがある。そし
て、この上部円筒部３ｂの下端と下部円筒部６ａの上端
とは截頭円錐状のウェブ５Ｃによ）連結されている。こ
の本体部３の上部円筒部３ｂには穴部４ａを有する有底
円筒状のシリンダ４が摺動自在に挿入されておシ、この
シリンダ４は、その上部外周の虜に嵌着したリング１１
により、上部円筒部３ｂから下方へ抜は出すのを防止さ
れている。シリンダ４の穴部４＆にはプランジャ５が摺
動自在に挿入されている。このプランジャ５は中央部に
連通孔６を有する隔壁５ａを有しておシ、この隔壁５ａ
の上部が油室７になっている。In FIG. 1, a hydraulic pulse lifter 1 of an OHC type internal combustion engine (hereinafter also referred to as engine) has a cap 2 and a main body 3. The cap 2 includes a cylindrical portion 2a and a top plate that closes the upper end of the cylindrical portion 2a.
There is an upper cylindrical part 6b having a diameter smaller than a. The lower end of the upper cylindrical portion 3b and the upper end of the lower cylindrical portion 6a are connected by a truncated conical web 5C. A bottomed cylindrical cylinder 4 having a hole 4a is slidably inserted into the upper cylindrical portion 3b of the main body 3, and a ring 11 fitted into the upper outer periphery of the cylinder 4 is inserted into the upper cylindrical portion 3b.
This prevents it from being pulled out downward from the upper cylindrical portion 3b. A plunger 5 is slidably inserted into the hole 4& of the cylinder 4. This plunger 5 has a partition wall 5a having a communication hole 6 in the center, and this partition wall 5a
The upper part is the oil chamber 7.
そして、プランジャ５の隔壁５ａの下部とシリンダ４と
により高圧室８が形成されており、隔壁５ａの下面には
高圧室８から油室７へ油の逆流するのを防止するための
チェック弁９が圧縮ばね１０によシ取りつけられている
。A high pressure chamber 8 is formed by the lower part of the partition wall 5a of the plunger 5 and the cylinder 4, and a check valve 9 is provided on the lower surface of the partition wall 5a to prevent oil from flowing back from the high pressure chamber 8 to the oil chamber 7. is attached to the compression spring 10.
上記のように、本体部６の上部円筒部３ｂに、プランジ
ャ５を収容したシリンダ４を取多つけ、上部円筒部３ｂ
の上部にキャップ２を載置すると、油圧パルプリフタ１
が形成される。そして、この油圧パルグリフタ１はエン
ジンのＶリンダヘッド１４のガイド孔１４ａに摺動可能
に挿入され、そのキャップ２がカム１５に当接するとと
もにシリンダ４の下面はパルプスプリング１７によ）押
し上げられた吸・排気弁のパルプステム１６の上面に当
接する。As described above, multiple cylinders 4 containing plungers 5 are attached to the upper cylindrical portion 3b of the main body 6, and the upper cylindrical portion 3b
When the cap 2 is placed on top of the hydraulic pulp lifter 1
is formed. The hydraulic pulse lifter 1 is slidably inserted into the guide hole 14a of the V-cylinder head 14 of the engine, and its cap 2 comes into contact with the cam 15, and the lower surface of the cylinder 4 is pushed up by the pulp spring 17. - Abuts against the upper surface of the pulp stem 16 of the exhaust valve.
この場合、キャップ２の円筒部２ａ下端と本体部６の下
部円筒部３ａ上端との間は環状の隙間１８になっている
。そして、シリンダヘッド１４のガイド孔１１には、隙
間１８に連通して、この部に油を供給する油供給孔１９
が設けられている。In this case, an annular gap 18 is formed between the lower end of the cylindrical portion 2a of the cap 2 and the upper end of the lower cylindrical portion 3a of the main body portion 6. The guide hole 11 of the cylinder head 14 has an oil supply hole 19 that communicates with the gap 18 and supplies oil to this part.
is provided.
本体部３の小円筒部６ｂの上部には小泊孔１２が適数（
図では１個のみ示す。）あけられてお夛、キャップ２の
頂板２ｂの下面にも油溝１３があけられている。A suitable number of small holes 12 (
Only one is shown in the figure. ) An oil groove 13 is also formed on the bottom surface of the top plate 2b of the cap 2.
上記の構成において、エンジンが作動すると、オイルポ
ンプ（図示せず）から送られてきた圧油くシリンダヘッ
ド１４の油供給孔１９から油圧パルグリ７タ１のキャッ
プ２と本体部３との１ｌＪｊｌｉ６１８を経てキャップ
２と本体部６とによＱ形成された空間内に流入する。そ
して、本体部６の小円筒部３ｂの小泊孔１２を通ってシ
リンダ４の上部とキャップ２の下面との隙間を経て、キ
ャップ２の頂板２ｂ下面の油１１１１３に達する。そし
て、この油１１１１１３からグランジャ５０油室７へ流
入する。In the above configuration, when the engine is operated, the pressure oil sent from the oil pump (not shown) is supplied from the oil supply hole 19 of the cylinder head 14 to the cap 2 of the hydraulic pulse generator 1 and the main body 3. Then, it flows into the space Q formed by the cap 2 and the main body part 6. The oil then passes through the small hole 12 of the small cylindrical part 3b of the main body part 6, passes through the gap between the upper part of the cylinder 4 and the lower surface of the cap 2, and reaches the oil 11113 on the lower surface of the top plate 2b of the cap 2. Then, the oil 111113 flows into the oil chamber 7 of the granger 50.
エンジンの作動中においてカム１５が油圧／＜ＩＶプリ
フタ１のキャップ２を押し下げた時には、プランジャ４
がキャップ２によ）押し下げられると高圧室８内の油が
高圧になり、カム１５による押下刃を支持するのは従来
と変）ない。When the cam 15 presses down the cap 2 of the hydraulic pressure/<IV prelifter 1 while the engine is running, the plunger 4
When the blade is pressed down by the cap 2, the oil in the high pressure chamber 8 becomes high pressure, and the cam 15 supports the pressing blade, which is the same as in the past.
上記のように、油圧バルブリフタ１はキャップ２と本体
部とを別体で構成したので、キャップ２としては耐摩耗
性の高い材料（例えば鉄系材料χ又本体部６としては軽
い材料（例えばアルミニュウム系材料）を使用すると、
油圧パルプリフタ１全体としての重量を従来よ如軽減す
ることができる。又、油圧パルプリフタ１の高さｈを従
来の油圧パルプリフタ５１の高さと同じとすると、第２
図に示すように、油圧パルプリフタ１は油圧パルプリフ
タ５１に対してキャップ２の円筒部２＆の下端と本体部
６の下部円筒部３ａの上端との環状隙間１８に相当する
高さｈ１部分の材料が不要となるため、その分電量を軽
減することができる。As mentioned above, the hydraulic valve lifter 1 is constructed with the cap 2 and the main body separately, so the cap 2 is made of a highly wear-resistant material (e.g. iron-based material), and the main body 6 is made of a light material (e.g. aluminum). When using materials such as
The weight of the hydraulic pulp lifter 1 as a whole can be reduced compared to the conventional method. Furthermore, assuming that the height h of the hydraulic pulp lifter 1 is the same as the height of the conventional hydraulic pulp lifter 51, the second
As shown in the figure, the hydraulic pulp lifter 1 has a material at a height h1 corresponding to the annular gap 18 between the lower end of the cylindrical portion 2& of the cap 2 and the upper end of the lower cylindrical portion 3a of the main body portion 6 with respect to the hydraulic pulp lifter 51. Since this is not necessary, the amount of electricity can be reduced.
さらに、環状隙間１８があることによシ油圧バルブリフ
タ５１に設けたような環状波ｌｌｌ５６も不要となる。Furthermore, due to the annular gap 18, an annular wave 1156 such as that provided in the hydraulic valve lifter 51 is also unnecessary.
発明の効果
以上の説明から明らかなように、この発明によると油圧
バｙプリフタのキャップと本体部とを別体で構成したこ
とにより、キャップには耐摩耗性の高い材料又本体部に
は軽量の材料を使用し、又キャップと本体部との間に環
状隙間を設けたことによシ油圧バルブリフタの重量を従
来よシ軽くすることができる。又、従来本体部又はシリ
ンダヘッドのガイド孔に設けていた環状溝も設ける必要
がないので加工工数を従来より低減することができる。Effects of the Invention As is clear from the above explanation, according to the present invention, the cap and main body of the hydraulic by-lifter are constructed separately, so that the cap is made of a highly wear-resistant material and the main body is made of a lightweight material. By using this material and providing an annular gap between the cap and the main body, the weight of the hydraulic valve lifter can be reduced compared to the conventional one. Further, since there is no need to provide an annular groove that was conventionally provided in the guide hole of the main body or cylinder head, the number of machining steps can be reduced compared to the conventional method.
第１図、第２図はこの発明の一実施例を丞し、第１図は
シリンダヘッドのガイド孔に取９つけた油圧パルプリフ
タの縦断面図、第２図は油圧パルプリフタの軽量化構造
の説明図、＠５図は従来の油圧バｐ、ブクフタの第１図
に対応する図である。
１・・・油圧パルプリフタ ２・・・キャップ２ａ・・
・円筒部 ２ｂ・・・頂板
３・・・本体部 ３ａ・・・下部円筒部３ｂ・・・上部
円筒部 ４・・・シリンダ４ａ・・・穴部 ５・・・プ
ランジャ
５ａ・・・隔壁 ６・・・連通孔
７・・・油室 ８・・・高圧室
９・・・チェック弁 １４・・・シリンダヘッド１１−
・・ガイド孔 １５・・・カム
１６・・・パルプステム １８・・・環状１１１’１６
出願人 小田井鉄工株式会社
代理人 升珊士 岡 １）英 彦Figures 1 and 2 show an embodiment of the present invention. Figure 1 is a vertical cross-sectional view of a hydraulic pulp lifter installed in a guide hole of a cylinder head, and Figure 2 is a lightweight structure of a hydraulic pulp lifter. The explanatory drawing @Fig. 5 is a diagram corresponding to Fig. 1 of the conventional hydraulic cover. 1...Hydraulic pulp lifter 2...Cap 2a...
- Cylindrical part 2b...Top plate 3...Body part 3a...Lower cylindrical part 3b...Upper cylindrical part 4...Cylinder 4a...Hole part 5...Plunger 5a...Partition wall 6 ...Communication hole 7...Oil chamber 8...High pressure chamber 9...Check valve 14...Cylinder head 11-
... Guide hole 15 ... Cam 16 ... Pulp stem 18 ... Annular 111'16
Applicant: Odai Iron Works Co., Ltd. Agent: Masusanji Oka 1) Hidehiko
Claims (1)
収容され、連通孔を有する隔壁の上部に油室を、又隔壁
の下部で前記シリンダとの間に高圧室を形成するプラン
ジャと、前記高圧室内に設けられてプランジャの連通孔
を閉じるチェック升とを有しかつシリンダヘッドのガイ
ド孔に摺動自在に収容されて、カムと吸・＃１′気弁の
パルプステムとの間に位置するオーバーへラドカム型内
燃機関の油圧パルプリフタであって、シリンダヘッドの
ガイド孔に対して摺動可能表内筒部ととの円筒部上面を
閉鎖する頂板とを有しこの頂板が前記力ふに当接するキ
ャップと、前記プランジャを収容したＦＵンダを摺動可
能に処容する上部円筒部と円筒部下端との間に環状隙間
を形成したことを特徴とするオーバーへラドカム型機間
の油圧パルプリフタ。a cylindrical cylinder with a bottom; a plunger that is slidably housed in the cylinder and forms an oil chamber in the upper part of a partition wall having a communication hole and a high pressure chamber between the cylinder and the cylinder in the lower part of the partition wall; A check box is provided in the high pressure chamber to close the communication hole of the plunger, and is slidably accommodated in the guide hole of the cylinder head, between the cam and the pulp stem of the suction/air valve #1'. This is a hydraulic pulp lifter for an internal combustion engine of the over-Rad cam type, which has a front inner cylindrical part that is slidable with respect to a guide hole of a cylinder head, and a top plate that closes the top surface of the cylindrical part. An annular gap is formed between a cap that abuts on the cap, an upper cylindrical portion that slidably accommodates the FU cylinder housing the plunger, and a lower end of the cylinder. Pulp lifter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3118084A JPS60175712A (en) | 1984-02-20 | 1984-02-20 | Hydraulic valve lifter for overhead cam type engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3118084A JPS60175712A (en) | 1984-02-20 | 1984-02-20 | Hydraulic valve lifter for overhead cam type engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60175712A true JPS60175712A (en) | 1985-09-09 |
Family
ID=12324245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3118084A Pending JPS60175712A (en) | 1984-02-20 | 1984-02-20 | Hydraulic valve lifter for overhead cam type engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60175712A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995013457A1 (en) * | 1993-11-12 | 1995-05-18 | Ina Wälzlager Schaeffler Kg | Tappet rod for a valve gear mechanism in an internal combustion engine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5414687A (en) * | 1977-07-06 | 1979-02-03 | Hitachi Ltd | Manufacture of mos semiconductor device |
-
1984
- 1984-02-20 JP JP3118084A patent/JPS60175712A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5414687A (en) * | 1977-07-06 | 1979-02-03 | Hitachi Ltd | Manufacture of mos semiconductor device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995013457A1 (en) * | 1993-11-12 | 1995-05-18 | Ina Wälzlager Schaeffler Kg | Tappet rod for a valve gear mechanism in an internal combustion engine |
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