JPS6316107A - Valve lifter - Google Patents

Valve lifter

Info

Publication number
JPS6316107A
JPS6316107A JP15935386A JP15935386A JPS6316107A JP S6316107 A JPS6316107 A JP S6316107A JP 15935386 A JP15935386 A JP 15935386A JP 15935386 A JP15935386 A JP 15935386A JP S6316107 A JPS6316107 A JP S6316107A
Authority
JP
Japan
Prior art keywords
valve lifter
skirt
valve
tip
ribs
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.)
Granted
Application number
JP15935386A
Other languages
Japanese (ja)
Other versions
JP2624474B2 (en
Inventor
Isao Harada
勲 原田
Tomiyasu Hirano
平野 富保
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ODAI TEKKO KK
Original Assignee
ODAI TEKKO KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ODAI TEKKO KK filed Critical ODAI TEKKO KK
Priority to JP61159353A priority Critical patent/JP2624474B2/en
Publication of JPS6316107A publication Critical patent/JPS6316107A/en
Application granted granted Critical
Publication of JP2624474B2 publication Critical patent/JP2624474B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12Transmitting gear between valve drive and valve
    • F01L1/14Tappets; Push rods
    • F01L1/143Tappets; Push rods for use with overhead camshafts

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

PURPOSE:To gain a light but strong valve lifter by forming hollows and ribs at least on respective parts of the back surface of a tip and the inside surface of the skirt, of a valve lifter. CONSTITUTION:Valve lifter 5 is formed in a bottom up cylinder style with a cylindrical skirt 6 that slides in a guide hole and a disc like tip 7 provided on the upper end of it. On the back surface 7a of the tip 7, tip side hollows 13 in a quarter circle shape are provided and between them cross shape ribs 14 are formed. The thickness of this tip side hollows 13 are formed thinner than the conventional one. On the inner surface of the skirt 6, hollow channels 11 are formed along the full circle at a fixed interval, and between respective adjacent skirt side hollow channels 11, a rib 12 also serving as a reinforced member is formed.

Description

【発明の詳細な説明】 発明の目的 (産業上の利用分野) この発明は、内燃機関の動弁機構に用いられるバルブリ
フタの構造に関するものである。
DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to the structure of a valve lifter used in a valve mechanism of an internal combustion engine.

(従来の技術) 一般に、バルブリフタはカムとバルブとの間に介在され
、該カムの回転運動をバルブの往復運動に変える役割を
果たすため、該バルブリフタ全体には大きな押圧力が加
わる。
(Prior Art) Generally, a valve lifter is interposed between a cam and a valve, and plays the role of converting the rotational movement of the cam into reciprocating movement of the valve, so that a large pressing force is applied to the entire valve lifter.

従って、従来よりこのバルブリフタは自身全体を比較的
厚肉とすることによってこれらの性能を維持している。
Therefore, conventional valve lifters maintain these performances by making the entire valve lifter relatively thick.

(発明が解決しようとする問題点) ところが、前記のように構成されたバルブリフタは重量
が大きいため、慣性モーメントが大きくなる傾向がある
(Problems to be Solved by the Invention) However, since the valve lifter configured as described above has a large weight, it tends to have a large moment of inertia.

特に、近年の内燃機関は高回転域までスムーズに回って
高い出力を発生するように性能向上が図られているため
、このような内燃機関に慣性モーメントの大きいバルブ
リフタを使用すると、高回転域においてバルブが追従し
きれな(なって予定された性能がでなくなるばかりでな
く、燃費も向上しないという問題がある。
In particular, the performance of modern internal combustion engines has been improved so that they can rotate smoothly up to the high speed range and generate high output, so if a valve lifter with a large moment of inertia is used in such an internal combustion engine, There is a problem in that the valves are not able to fully follow the same conditions (this results in not only not being able to achieve the intended performance, but also not improving fuel efficiency).

発明の構成 (問題点を解決するための手段) 采発明は、前記問題点を解決するため、チ・ノブ部底面
及びスカート部内面の少なくとも一部に凹部とリブとを
設けたという手段を採用している。
Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the invention employs a means of providing a recess and a rib in at least a part of the bottom surface of the chi knob part and the inner surface of the skirt part. are doing.

(作用) スカート部内面及びチップ部底面には凹部が形成されて
いるため、その部分の肉厚を薄くすることができるとと
もに、バルブリフタ自体を軽量化することができる。ま
た、これらの内面及び底面には補強用のリブが設けられ
ているため、前記バルブリフタ全体としての強度が低下
することはない。
(Function) Since the recessed portions are formed on the inner surface of the skirt portion and the bottom surface of the tip portion, the wall thickness of these portions can be reduced, and the weight of the valve lifter itself can be reduced. Further, since reinforcing ribs are provided on the inner surface and the bottom surface, the strength of the valve lifter as a whole does not decrease.

(実施例) 以下、この発明をOHC動弁機構を有する自動車用内燃
機関に用いる直打式バルブリフタに具体化した一実施例
を第1〜4図に従って説明する。
(Example) Hereinafter, an example in which the present invention is embodied in a direct-acting valve lifter used in an automobile internal combustion engine having an OHC valve mechanism will be described with reference to FIGS. 1 to 4.

第4図に示すように、シリンダヘッド1の上方には吸排
気バルブ開閉用のカム2が形成されたカムシャフト3が
延びている。シリンダヘッド1におけるカム2直下の部
位にはガイド孔4が貫設されており、同ガ1′ド孔4に
は次のように構成された直打式のバルブリフタ5が摺動
可能に挿入されている。
As shown in FIG. 4, a camshaft 3 extends above the cylinder head 1 and has a cam 2 formed thereon for opening and closing intake and exhaust valves. A guide hole 4 is provided in a portion of the cylinder head 1 directly below the cam 2, and a direct-acting type valve lifter 5 configured as follows is slidably inserted into the guide hole 4. ing.

すなわち、本実施例のバルブリフタ5は、前記ガイド孔
4内を摺動する円筒状のスカートp++ 6とその上端
に設けられた円板状のチップ部7とでiWI立有底有底
筒状成されている。
That is, the valve lifter 5 of this embodiment has a cylindrical skirt p++ 6 that slides within the guide hole 4 and a disc-shaped tip portion 7 provided at the upper end of the skirt p++ to form an iWI vertical cylindrical structure with a bottom. has been done.

さらに、詳述すると、第1図に示すように、前記スカー
ト部内面6aには3本のスカート側口状l清11が所定
間隔をおいて全周にわたって凹設されており、各スカー
ト側凹状溝11の間には補強材を兼ねるリブ12が形成
されている。本実施σりおいては、この凹状溝11が形
成されたスカート部6の肉厚は従来のスカート部の肉厚
1〜1.5wから0.5〜1宵lに薄肉化されており、
前記リブ12の肉厚は該スカート部6の強度を維持する
ために2酊に形成されている。
Further, to explain in detail, as shown in FIG. 1, three skirt side openings 11 are recessed on the inner surface 6a of the skirt portion along the entire circumference at predetermined intervals. Ribs 12 are formed between the grooves 11 and also serve as reinforcing materials. In this embodiment, the thickness of the skirt portion 6 in which the concave groove 11 is formed is reduced from the conventional skirt thickness of 1 to 1.5W to 0.5 to 1L.
The thickness of the rib 12 is set to 2 to maintain the strength of the skirt portion 6.

円板状に形成されたチップ部7の底面7aには四半円弧
状をなすチップ側凹部13が凹設されており、該凹部1
3の間には十字状に延びるリブ14が形成されている。
A chip-side recess 13 having a quarter-arc shape is formed in the bottom surface 7a of the chip portion 7 formed in a disc shape.
A rib 14 extending in a cross shape is formed between the ribs 3 and 3.

本実施例においては、このチップ側凹部13の肉厚は従
来のチップ部の肉厚の3龍から1〜1.5龍に薄肉化さ
れており、リブ14の肉厚は該チップ部7自体の強度を
維持するために31mに形成されている。また、前記リ
ブ14の中央部の交差部には後述するバルブステム16
が当たる当り部15が下方に突出した状態に設けられて
いる。
In this embodiment, the thickness of the chip-side recess 13 is reduced from the conventional chip part thickness of 3 to 1.5, and the thickness of the rib 14 is the same as that of the chip part 7 itself. The length of the bridge is 31m in order to maintain the strength of the bridge. Further, a valve stem 16, which will be described later, is provided at the central intersection of the ribs 14.
A contact portion 15 against which the contact point is applied is provided in a downwardly protruding state.

従って、このバルブリフタ5は従来のバルブリフタと同
様の強度を維持しながら薄肉化されることによって、自
身が軽量化されて慣性モーメントを小さくすることがで
きるようになっている。
Therefore, this valve lifter 5 is made thinner while maintaining the same strength as a conventional valve lifter, thereby being able to reduce its weight and reduce its moment of inertia.

前記シリンダヘッド1には吸気バルブ(又は排気バルブ
、以下バルブと略す)17が摺動可能に挿入されており
、そのバルブステム16の上端は前記バルブリフタ5の
当り部15の下面に当接されている。
An intake valve (or exhaust valve, hereinafter abbreviated as valve) 17 is slidably inserted into the cylinder head 1, and the upper end of the valve stem 16 is in contact with the lower surface of the contact portion 15 of the valve lifter 5. There is.

また、バルブステム16の上端部にはコツタ18が装着
され、該コツタ18は下面はど縮径する円錐台状に形成
されている。前記コツタ18の外周にはバルブスプリン
グリテーナ19が嵌合され、該バルブスプリングリテー
ナ19のテーパ状の内周面はコック18のテーパ状の外
周面と当接している。また、バルブスプリングリテーナ
19のフランジ部とシリンダヘッド1内に設けられた支
持面20との間には、バルブスプリング21が圧縮状態
で装着されている。前記バルブスプリング21は常にバ
ルブ17を上方へ付勢し、バルブステム16の上端を前
記バルブリフタ5の当り部15に当接させている。
Further, a clasp 18 is attached to the upper end of the valve stem 16, and the clasp 18 is formed in the shape of a truncated cone whose lower surface is reduced in diameter. A valve spring retainer 19 is fitted around the outer circumference of the cock 18, and the tapered inner circumferential surface of the valve spring retainer 19 is in contact with the tapered outer circumferential surface of the cock 18. Further, a valve spring 21 is mounted in a compressed state between the flange portion of the valve spring retainer 19 and a support surface 20 provided within the cylinder head 1. The valve spring 21 always urges the valve 17 upward and brings the upper end of the valve stem 16 into contact with the contact portion 15 of the valve lifter 5.

以上のように構成されたこの実施例につき、次にその作
用を効果とともに記載する。
Regarding this embodiment configured as described above, its operation and effects will be described next.

まず、カムシャフト2が回転することによってカム2が
周期的にバルブリフタ5を押し下げる。
First, as the camshaft 2 rotates, the cam 2 periodically pushes down the valve lifter 5.

すると、前記バルブリフタ5はそのスカート部6が前記
ガイド溝4内周面にそって摺りJ移動するとともに、前
記当り部15に当接されたバルブステム16を前記バル
ブスプリング21の付勢力に抗して下方に押圧し、その
先端のバルブ17を開ける。
Then, the skirt portion 6 of the valve lifter 5 slides along the inner peripheral surface of the guide groove 4, and the valve stem 16, which is in contact with the abutment portion 15, resists the urging force of the valve spring 21. and press downward to open the valve 17 at the tip.

このとき、前記バルブリフタ5は従来のバルブリフタと
同様の強度を有しながら薄肉化されているため、自身を
軽量化して慣性モーメントを小さくすることができる。
At this time, since the valve lifter 5 has the same strength as a conventional valve lifter but is made thinner, it can be made lighter and have a smaller moment of inertia.

従って、前記カム2の回転が高回転となっても確実にバ
ルブリフタ5を追従させることができ、内燃機関として
予定された性能を発揮することができるばかりでなく、
燃費を向上させることもできる。
Therefore, even if the rotation of the cam 2 becomes high, the valve lifter 5 can reliably follow the rotation, and not only can the internal combustion engine exhibit the intended performance,
It can also improve fuel efficiency.

なお、本発明は前記実施例に限定されるものではなく、
例えば、次に示すように変更して具体化することも可能
である。
Note that the present invention is not limited to the above embodiments,
For example, it is also possible to implement the following modifications.

(1)前記スカート部内面6a側のリプ12は必ずしも
本実施例のチップ部7と平行するように設ける必要はな
く、該チップ部7と垂直状態となるように形成しても良
い。そして、この場合には前記凹状溝11もチップ部7
に対して垂直状態に形成することが好ましい。
(1) The lip 12 on the inner surface 6a of the skirt portion does not necessarily need to be provided parallel to the tip portion 7 of this embodiment, and may be formed perpendicular to the tip portion 7. In this case, the concave groove 11 is also
It is preferable to form it in a state perpendicular to.

(2)本実施例においてはチップ部7とスカート部6と
の両方に凹状溝11及び凹部13を形成したが、必ずし
も両方に形成する必要はなく、どちらかだけに形成して
も良い。
(2) In this embodiment, the concave grooves 11 and the concave portions 13 are formed in both the tip portion 7 and the skirt portion 6, but they do not necessarily need to be formed in both, and may be formed in only one of them.

(3)前記バルブリフタ5はシムを用いるタイプのもの
に具体化しても良い。
(3) The valve lifter 5 may be of a type that uses shims.

(4)第5図に示すように、チップ部7のみにチップ側
凹部13とリプ14とを設け、前記スカート部6には複
数の切欠窓23を設けても良い。また、この場合におい
て、前記切欠窓23の大きさはスカート部6の強度を落
とさない程度の大きさにする必要がある。
(4) As shown in FIG. 5, only the tip portion 7 may be provided with the tip side recess 13 and the lip 14, and the skirt portion 6 may be provided with a plurality of cutout windows 23. Further, in this case, the size of the cutout window 23 needs to be large enough not to reduce the strength of the skirt portion 6.

(5)本発明をOHV動弁機構を有するバルブリフタに
具体化することも可能である。
(5) It is also possible to embody the present invention in a valve lifter having an OHV valve mechanism.

発明の効果 以上詳述したように、本発明のバルブリフタは自身の強
度を落とすことなく軽量化することができるため、カム
の高回転時においても優れた追従性を発揮することがで
きるという優れた効果を奏する。
Effects of the Invention As detailed above, the valve lifter of the present invention has the advantage of being able to reduce its weight without reducing its strength, and thus exhibiting excellent followability even when the cam rotates at high speed. be effective.

【図面の簡単な説明】[Brief explanation of drawings]

第1〜4図は本発明の実施例を示し、第1図はバルブリ
フタを示す一部破断斜視図、第2図は第1図の側面断面
図、第3図は第1図の底面図、第4図は内燃機関にこの
バルブリフタを組み込んだ状態を示す断面図、第5図は
別例を示すバルブリフタの側面断面図である。 6a・・スカート部内面  7a・・チップ部底面  
11.13・・凹部  12,14・・リプ 特許出願人     小田井鉄工株式会社代理人   
弁理士     恩1)博宣第2図 第4′図
1 to 4 show embodiments of the present invention, FIG. 1 is a partially cutaway perspective view showing a valve lifter, FIG. 2 is a side sectional view of FIG. 1, and FIG. 3 is a bottom view of FIG. 1. FIG. 4 is a sectional view showing this valve lifter installed in an internal combustion engine, and FIG. 5 is a side sectional view of another example of the valve lifter. 6a...Inner surface of skirt part 7a...Bottom surface of tip part
11.13...Concavity 12,14...Rep Patent applicant Odai Iron Works Co., Ltd. Agent
Patent Attorney On 1) Hironobu Figure 2 Figure 4'

Claims (1)

【特許請求の範囲】 1、チップ部底面(7a)及びスカート部内面(6a)
の少なくとも一部に凹部(11、13)とリブ(12、
14)とを設けたことを特徴とするバルブリフタ。 2、前記凹部(11)は前記スカート部内面(6a)に
所定間隔をおいて複数設けられていることを特徴とする
特許請求の範囲第1項に記載のバルブリフタ。 3、前記リブ(12)は前記凹部(11)間に設けられ
ていることを特徴とする特許請求の範囲第1項又は第2
項のいずれか1項に記載のバルブリフタ。
[Claims] 1. Bottom surface of tip part (7a) and inner surface of skirt part (6a)
recesses (11, 13) and ribs (12,
14) A valve lifter comprising: 2. The valve lifter according to claim 1, wherein a plurality of the recesses (11) are provided on the inner surface (6a) of the skirt portion at predetermined intervals. 3. Claim 1 or 2, characterized in that the rib (12) is provided between the recesses (11).
The valve lifter according to any one of paragraphs.
JP61159353A 1986-07-07 1986-07-07 Valve lifter Expired - Lifetime JP2624474B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61159353A JP2624474B2 (en) 1986-07-07 1986-07-07 Valve lifter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61159353A JP2624474B2 (en) 1986-07-07 1986-07-07 Valve lifter

Publications (2)

Publication Number Publication Date
JPS6316107A true JPS6316107A (en) 1988-01-23
JP2624474B2 JP2624474B2 (en) 1997-06-25

Family

ID=15691989

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61159353A Expired - Lifetime JP2624474B2 (en) 1986-07-07 1986-07-07 Valve lifter

Country Status (1)

Country Link
JP (1) JP2624474B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6354806U (en) * 1986-09-29 1988-04-13

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58173707U (en) * 1982-05-17 1983-11-19 トヨタ自動車株式会社 valve lifter
JPS6147407U (en) * 1984-09-03 1986-03-29 スズキ株式会社 Tappet
JPS6298706U (en) * 1985-12-11 1987-06-23

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58173707U (en) * 1982-05-17 1983-11-19 トヨタ自動車株式会社 valve lifter
JPS6147407U (en) * 1984-09-03 1986-03-29 スズキ株式会社 Tappet
JPS6298706U (en) * 1985-12-11 1987-06-23

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6354806U (en) * 1986-09-29 1988-04-13

Also Published As

Publication number Publication date
JP2624474B2 (en) 1997-06-25

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