JPS6329128Y2 - - Google Patents
Info
- Publication number
- JPS6329128Y2 JPS6329128Y2 JP1981111451U JP11145181U JPS6329128Y2 JP S6329128 Y2 JPS6329128 Y2 JP S6329128Y2 JP 1981111451 U JP1981111451 U JP 1981111451U JP 11145181 U JP11145181 U JP 11145181U JP S6329128 Y2 JPS6329128 Y2 JP S6329128Y2
- Authority
- JP
- Japan
- Prior art keywords
- spring
- valve spring
- valve
- damper
- prevention device
- 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
- 230000002265 prevention Effects 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000005480 shot peening Methods 0.000 description 2
- 208000012661 Dyskinesia Diseases 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Landscapes
- Vibration Prevention Devices (AREA)
- Springs (AREA)
Description
【考案の詳細な説明】
本考案は、主に内燃機関の動弁装置における弁
ばねのサージング（異常運動）防止装置の改良に
関するものである。[Detailed Description of the Invention] The present invention mainly relates to an improvement of a device for preventing surging (abnormal movement) of a valve spring in a valve train for an internal combustion engine.
内撚機関の動弁装置における弁ばねは、その構
造上弁ばねの内径側に最大応力が発生する。この
ため、弁ばねの疲れ強度を向上させるため、主と
して内径側表面をねらい、シヨツトピーニングを
施すことが一般に行なわれている。 Due to its structure, maximum stress occurs on the inner diameter side of the valve spring in a valve train of an internally twisted engine. Therefore, in order to improve the fatigue strength of the valve spring, shot peening is generally performed mainly on the inner diameter side surface.
そして、弁の開閉を規定のリフトでかつ規定の
速度で行なうために、弁ばねのコイル直径、巻数
及びコイル材の太さが決められ、一定のばね特性
を有するように弁ばねは設計されている。また、
ばねのサージング防止手段として一般には、ばね
の伸縮時に摩擦抵抗をもたせて、ばねの個有振動
を抑制するようにしているが、上記ばね特性を損
なわないようにする必要がある。 In order to open and close the valve with a specified lift and at a specified speed, the coil diameter, number of turns, and coil material thickness of the valve spring are determined, and the valve spring is designed to have certain spring characteristics. There is. Also,
Generally, as a spring surging prevention means, a frictional resistance is provided when the spring expands and contracts to suppress the unique vibration of the spring, but it is necessary to avoid impairing the spring characteristics.
また従来、弁ばねのサージング防止として、第
１図に示すように、弁ばね１の内径側にダンパス
プリング２をある締代を持たせて挿入することが
一般に実施されている。ところが、このダンパス
プリング２の効果は、弁ばね１との摩擦により発
揮されるため、前記弁ばね１の内径側摩擦タイプ
では、当然弁ばね１の内径側摩耗を持たらす。し
たがつて、シヨツトピーニングで疲れ強度を向上
させた表面層が摩耗によりなくなるため弁ばね１
の疲れ強度が低下するという問題点がある。これ
は第２図に示す、バルブガイド３とバルブ４の間
への潤滑油量をコントロールする目的で設けられ
ているアンブレラ５を有する動弁装置においても
同様に云える問題点である。また、第１図および
第２図に示す従来の動弁装置におけるダンパスプ
リング２は、動弁系の慣性質量として働くので運
動上不利であるという問題点も有している。 Conventionally, in order to prevent surging of a valve spring, a damper spring 2 is generally inserted into the inner diameter side of a valve spring 1 with a certain tightening margin, as shown in FIG. However, since the effect of the damper spring 2 is exerted by friction with the valve spring 1, the inner diameter side friction type of the valve spring 1 naturally causes wear on the inner diameter side of the valve spring 1. Therefore, the surface layer whose fatigue strength was improved by shot peening is lost due to wear, so the valve spring 1
There is a problem that the fatigue strength of This problem also applies to the valve train shown in FIG. 2, which has an umbrella 5 provided for the purpose of controlling the amount of lubricating oil between the valve guide 3 and the valve 4. Further, the damper spring 2 in the conventional valve train shown in FIGS. 1 and 2 has a problem in that it is disadvantageous in terms of motion because it acts as an inertial mass of the valve train.
本考案は、このような従来技術における問題点
を解消するためになされたもので、その目的とす
るところは、弁ばねの特性及び弁ばねの疲れ強度
を低下させることなく、したがつて、弁ばねの折
損による機関損傷に対して信頼性の高い、且つ、
動弁系の慣性質量に含まれない運動上有利な弁ば
ねのサージング防止装置を提供することにある。 The present invention was devised to solve these problems in the prior art, and its purpose is to improve the valve spring without reducing the characteristics of the valve spring and the fatigue strength of the valve spring. Highly reliable against engine damage due to spring breakage, and
It is an object of the present invention to provide a surging prevention device for a valve spring that is advantageous in motion and is not included in the inertial mass of a valve train.
以下、本考案の実施例を第３図ないし第５図に
基づいて説明する。 Embodiments of the present invention will be described below with reference to FIGS. 3 to 5.
本考案に係るダンパスプリング７は、第３図に
みられるようにキヤツプ状をしており、従来のも
のとは違つて弁ばね１の外径側に締代を持たせて
嵌合される。そして、ダンパスプリング７には、
弁ばね１のばね作用を十分に引き出すように、複
数個の切欠き部７ａが形成されている。 The damper spring 7 according to the present invention has a cap shape as shown in FIG. 3, and unlike the conventional damper spring 7, it is fitted to the valve spring 1 with a tightening margin on the outer diameter side. And in the damper spring 7,
A plurality of notches 7a are formed to fully utilize the spring action of the valve spring 1.
第４図は、本考案に係る第１実施例の使用状態
を示す断面図であるが、本実施例においては、ダ
ンパスプリング７′は、弁ばねシート８と一体に
形成されている。しかし、ダンパスプリングは、
弁ばねシート８と必ずしも一体に形成されるもの
ではなく、弁ばねシート８上に第３図に示す如き
ダンパスプリング７を載置してもよい。本実施例
においては、構成部品点数が減少し、コスト上、
組付性上有利であるという特長がある。なお、図
において、９はシリンダヘツドの弁ばねシート
部、１０はバルブコツタ、１１はバルブスプリン
グリテーナ、１２はアジヤストスクリユー、１３
はナツト、１４はロツカーアーム、１５はロツカ
ーシヤフトをそれぞれ示している。 FIG. 4 is a sectional view showing the state in which the first embodiment of the present invention is used. In this embodiment, the damper spring 7' is formed integrally with the valve spring seat 8. However, the damper spring
The damper spring 7 is not necessarily formed integrally with the valve spring seat 8, and a damper spring 7 as shown in FIG. 3 may be placed on the valve spring seat 8. In this embodiment, the number of component parts is reduced, and the cost is reduced.
It has the advantage of being easy to assemble. In the figure, 9 is the valve spring seat of the cylinder head, 10 is the valve retainer, 11 is the valve spring retainer, 12 is the adjuster screw, and 13 is the valve spring seat.
14 represents a nut, 14 represents a rocker arm, and 15 represents a rocker shaft.
第５図は、本考案に係る第２実施例の使用状態
を示す断面図であるが、第４図と同一構成要素の
ものには同一の符号を付し、その説明は省略す
る。本実施例においては、ダンパスプリング５′
がアンブレラの機能をも果すように形成されてい
る。しかし、ダンパスプリングは必ずしもアンブ
レラを兼ねる必要はなく、アンブレラとは別体に
設けてもよい。そして、この第２実施例において
も、構成部品点数が減少し、コスト上、組付性上
有利であるという特長がある。 FIG. 5 is a cross-sectional view showing the state of use of the second embodiment of the present invention, and the same components as those in FIG. 4 are given the same reference numerals and their explanations will be omitted. In this embodiment, the damper spring 5'
is formed so that it also functions as an umbrella. However, the damper spring does not necessarily have to serve as the umbrella, and may be provided separately from the umbrella. This second embodiment also has the advantage that the number of component parts is reduced, which is advantageous in terms of cost and ease of assembly.
以上述べたような本考案により、弁ばねの外径
側に、該弁ばねに対して締代を持たせて、キヤツ
プ状のダンパスプリングを嵌合させたので、ダン
パスプリングの内面と弁ばねの外径側とが常時摩
擦し、このために発生する熱損失で弁ばねの疲れ
強度を低下させることなく、すなわち、弁ばねの
折損による機関損傷に対して信頼性の高い弁ばね
のサージング防止装置が提供できる。しかも、該
キヤツプ状のダンパスプリングには、その周壁に
複数個の切欠き部が設けられているので、弁ばね
の作用を十分に引き出せて、動弁装置の作動には
何等の支障も来さない。また、このキヤツプ状の
ダンパスプリングには弁ばねの端部が座すか、あ
るいは弁ばねの端部を受けるかという構造である
ので、従来の如き弁ばねの内径側にリング状のダ
ンパスプリングを締代を持たせて嵌合させた構造
ではないので、動弁系の慣性質量として働かず運
動上有利であるという効果も奏する。また、本実
施例の如くにすれば、既に述べたとおり、部品点
数が減少し、コスト上、組付性上有利な弁ばねの
サージング防止装置が提供できる。 According to the present invention as described above, a cap-shaped damper spring is fitted with a tightening margin on the outer diameter side of the valve spring, so that the inner surface of the damper spring and the valve spring are connected to each other. A valve spring surging prevention device that is highly reliable against engine damage due to breakage of the valve spring, without reducing the fatigue strength of the valve spring due to constant friction between the outer diameter side and the resulting heat loss. can be provided. Moreover, since the cap-shaped damper spring has multiple notches on its peripheral wall, the action of the valve spring can be fully utilized, and the operation of the valve train will not be hindered in any way. do not have. In addition, the cap-shaped damper spring has a structure in which the end of the valve spring sits on or receives the end of the valve spring, so the ring-shaped damper spring is tightened on the inner diameter side of the valve spring, unlike conventional valve springs. Since the structure is not fitted with a margin, it does not act as an inertial mass of the valve train and is advantageous in terms of motion. Further, as described above, according to this embodiment, the number of parts is reduced, and a valve spring surging prevention device that is advantageous in terms of cost and ease of assembly can be provided.
第１図および第２図は、従来の弁ばねのサージ
ング防止装置の説明のための断面図、第３図は本
考案に係る一実施例のダンパスプリングの斜視
図、第４図は本考案の第１実施例の使用状態の断
面図、第５図は第２実施例の使用状態の断面図で
ある。
１…弁ばね、２，７，７′，５′…ダンパスプリ
ング、７ａ…切欠き部、５…アンブレラ、８…弁
ばねシート。
1 and 2 are cross-sectional views for explaining a conventional valve spring surging prevention device, FIG. 3 is a perspective view of a damper spring according to an embodiment of the present invention, and FIG. 4 is a sectional view for explaining a conventional valve spring surging prevention device. FIG. 5 is a sectional view of the first embodiment in use, and FIG. 5 is a sectional view of the second embodiment in use. DESCRIPTION OF SYMBOLS 1... Valve spring, 2, 7, 7', 5'... Damper spring, 7a... Notch, 5... Umbrella, 8... Valve spring seat.
Claims (1)
持たせて、その周壁に等角間隔に複数個の切欠
き部を有するキヤツプ状のダンパスプリングを
嵌合させたことを特徴とする弁ばねのサージン
グ防止装置。 (2) キヤツプ状のダンパスプリングが弁ばねシー
トと一体に形成されている実用新案登録請求の
範囲第(1)項記載の弁ばねのサージング防止装
置。 (3) キヤツプ状のダンパスプリングがアンブレラ
を兼ねて形成されている実用新案登録請求の範
囲第(1)項記載の弁ばねのサージング防止装置。[Claims for Utility Model Registration] (1) A cap-shaped valve spring having a tightening margin on the outer diameter side of the valve spring and having a plurality of notches at equal angular intervals on its peripheral wall. A valve spring surging prevention device characterized by fitting a damper spring. (2) A surging prevention device for a valve spring according to claim 1, wherein a cap-shaped damper spring is integrally formed with a valve spring seat. (3) A surging prevention device for a valve spring according to claim (1) of the utility model registration, in which a cap-shaped damper spring is formed to also serve as an umbrella.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11145181U JPS5827512U (en) | 1981-07-27 | 1981-07-27 | Valve spring surging prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11145181U JPS5827512U (en) | 1981-07-27 | 1981-07-27 | Valve spring surging prevention device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5827512U JPS5827512U (en) | 1983-02-22 |
| JPS6329128Y2 true JPS6329128Y2 (en) | 1988-08-05 |
Family
ID=29905790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11145181U Granted JPS5827512U (en) | 1981-07-27 | 1981-07-27 | Valve spring surging prevention device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5827512U (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5279411U (en) * | 1975-12-10 | 1977-06-14 | ||
| JPS5383907U (en) * | 1976-12-14 | 1978-07-11 |
-
1981
- 1981-07-27 JP JP11145181U patent/JPS5827512U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5827512U (en) | 1983-02-22 |
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