JPS624643Y2 - - Google Patents
Info
- Publication number
- JPS624643Y2 JPS624643Y2 JP1978084842U JP8484278U JPS624643Y2 JP S624643 Y2 JPS624643 Y2 JP S624643Y2 JP 1978084842 U JP1978084842 U JP 1978084842U JP 8484278 U JP8484278 U JP 8484278U JP S624643 Y2 JPS624643 Y2 JP S624643Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve guide
- guide hole
- oil
- oil retaining
- valve
- 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 36
- 239000003595 mist Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000010730 cutting oil Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】
本考案は主として小型４サイクルエンジン用の
吸気バルブガイドに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates primarily to an intake valve guide for small four-stroke engines.
４サイクルエンジンのバルブガイドは、一般に
軸受材のブツシユをアルミ合金又は鋳鉄製のシリ
ンダーあるいはシリンダーヘツドで構成されるバ
ルブガイド部に嵌合固定して形成しているが、そ
の場合はブツシユを別に用意する必要があり、加
工工数が増し、コストの増加を招く。 Valve guides for 4-stroke engines are generally formed by fitting and fixing a bushing made of bearing material into a valve guide section made of an aluminum alloy or cast iron cylinder or cylinder head, but in this case, a bushing must be prepared separately. This increases the number of processing steps and costs.
本考案は吸気バルブ用のバルブガイドにおい
て、上記従来のブツシユを廃止することを目的と
しており、次のように構成されている。 The present invention aims to eliminate the use of the above-mentioned conventional bushings in a valve guide for an intake valve, and is configured as follows.
すなわち本考案は、高硅素アルミニウムで形成
したシリンダーあるいはシリンダーヘツドにバル
ブガイド孔を明け、高硅素アルミニウム素地で形
成されるこのバルブガイド孔の内面に密巻螺旋状
のリーマ切削痕からなる保油溝を設け、保油溝の
底及び隣接する保油溝間の山部を滑らかに連続し
た円弧状断面に成形して上記バルブガイド孔の内
面の断面を波形にし、バルブガイド孔に吸気弁を
嵌合し、吸気弁の被駆動側端部をオイルミストを
有する室に突出させたことを特徴としている。 That is, the present invention has a valve guide hole formed in a cylinder or cylinder head made of high silicon aluminum, and an oil retaining groove made of a tightly wound spiral reamer cut on the inner surface of this valve guide hole made of high silicon aluminum base material. The bottom of the oil retaining groove and the mountain portion between adjacent oil retaining grooves are formed into a smoothly continuous arc-shaped cross section to make the cross section of the inner surface of the valve guide hole corrugated, and the intake valve is fitted into the valve guide hole. The intake valve is characterized in that the driven side end of the intake valve projects into a chamber containing oil mist.
次に実施例を図面により説明する。 Next, embodiments will be described with reference to the drawings.
第１図に於て１は高硅素アルミニウムで出来た
シリンダーブロツク、２はバルブガイド、３は吸
気弁、４は弁座、５は吸気孔、６は燃焼室、７は
弁ばね、８はばね受、９はタペツト、１０はカム
である。運転中はカム１０の回転によりタペツト
９が弁ばね７の弾力に抗して吸気弁３を押し上
げ、吸入行程になる燃焼室６内に吸気孔５から実
線矢印方向に新気を供給する。吸気弁３の被駆動
側端部、すなわちタペツト９側の端部はオイルミ
ストを有するクランク室１１に突出している。バ
ルブガイド２の部分にはクランク室１１内のオイ
ルミストが吸気弁３の軸部に付着したり、吸気弁
軸部とバルブガイド２の隙間を通して、或る程度
吸気孔５内の負圧に引かれて上がり、バルブガイ
ド２の吸気弁軸部間の潤滑に供される。 In Figure 1, 1 is a cylinder block made of high silicon aluminum, 2 is a valve guide, 3 is an intake valve, 4 is a valve seat, 5 is an intake hole, 6 is a combustion chamber, 7 is a valve spring, and 8 is a spring. 9 is the tappet, and 10 is the cam. During operation, the tappet 9 pushes up the intake valve 3 against the elasticity of the valve spring 7 due to the rotation of the cam 10, and fresh air is supplied from the intake hole 5 in the direction of the solid line arrow into the combustion chamber 6 during the intake stroke. The driven end of the intake valve 3, ie, the end on the tappet 9 side, projects into the crank chamber 11 containing oil mist. At the valve guide 2, oil mist in the crank chamber 11 may adhere to the shaft of the intake valve 3, or may be drawn to some extent by the negative pressure in the intake hole 5 through the gap between the intake valve shaft and the valve guide 2. The valve guide 2 is used for lubrication between the intake valve shaft portions of the valve guide 2.
第１図のＡ部分の拡大図を第２図に示す。バル
ブガイド２を形成している孔の内面には密巻螺旋
状の研削痕から成る保油溝１３が設けてあり、保
油溝１３の底１４は滑らかな円弧状断面であり、
又隣接した保油溝１３，１３間の山部１５も滑ら
かな円弧状断面を有する。 FIG. 2 shows an enlarged view of part A in FIG. 1. The inner surface of the hole forming the valve guide 2 is provided with an oil retaining groove 13 consisting of closely wound spiral grinding marks, and the bottom 14 of the oil retaining groove 13 has a smooth arcuate cross section.
Further, the ridge portion 15 between the adjacent oil retaining grooves 13, 13 also has a smooth arcuate cross section.
シリンダーブロツク１の材質としてCu4.0〜5.0
％と、Mg0.5％以下と、Zn1.0％以下と、Fe1.3％
以下と、Mn0.5％以下と、P0.05〜0.1％を含有
し、Si量を13.5〜16.0％にしてこれにNi0.5％以下
と、不純物としてSn0.3％以下を添加し、内部に
非常に高い硬度をもつ初晶Siを微細に析出せしめ
た過共晶のいわゆる高硅素アルミニウムが適して
いる。 Cu4.0~5.0 as the material of cylinder block 1
%, Mg 0.5% or less, Zn 1.0% or less, Fe 1.3%
It contains 0.5% or less of Mn, 0.05~0.1% of P, the amount of Si is 13.5~16.0%, and 0.5% or less of Ni and 0.3% or less of Sn are added as impurities. Hypereutectic, so-called high-silicon aluminum, in which finely precipitated primary Si crystals with extremely high hardness are precipitated, is suitable.
保油溝１３は例えばボール盤に超硬４枚刃リー
マを取付け、切削油は油性のものを使用したリー
マ加工で得ることができる。その場合第２図の溝
幅L1は0.28〜0.32mm、溝深さL2は0.013〜0.015mm
となり、このようなバルブガイドを吸気弁軸部と
の隙間L3＝0.072〜0.096mm（直径方向寸法）で使
用した場合の摩耗量と運転時間の関係を第３図に
示す。 The oil retaining groove 13 can be obtained, for example, by attaching a carbide four-blade reamer to a drilling machine and reaming using an oil-based cutting oil. In that case, the groove width L 1 in Figure 2 is 0.28 to 0.32 mm, and the groove depth L 2 is 0.013 to 0.015 mm.
FIG. 3 shows the relationship between the amount of wear and the operating time when such a valve guide is used with a gap L 3 between it and the intake valve shaft of 0.072 to 0.096 mm (diameter dimension).
第３図に於て縦軸は摩耗量、横軸は運転時間で
あり、図中は普通アルミニウムで第２図と同一
断面形状のバルブガイドを形成した場合の摩耗
量、は本考案によるバルブガイドの摩耗量を示
しており、第２図から明らかな如く本考案による
と、200時間経過時の摩耗量を殆ど０に保持する
ことができる。なお隙間L3を前記と同一条件で
保油溝１３をつけない場合は普通アルミニウム及
び高硅素アルミニウム共に短時間に焼付くことを
確認している。 In Fig. 3, the vertical axis is the amount of wear, and the horizontal axis is the operating time. As is clear from FIG. 2, according to the present invention, the amount of wear after 200 hours can be maintained at almost zero. It has been confirmed that when the gap L3 is kept under the same conditions as above and the oil retaining groove 13 is not provided, both normal aluminum and high-silicon aluminum seize in a short time.
以上説明したように本考案によると、シリンダ
ーを高硅素アルミニウムで形成し、そこに直接明
けたバルブガイド孔の内面で密巻螺旋状の切削痕
から成る保油溝を設けたので、保油溝１３（又は
バルブガイド孔）の一端に吸気孔５の負圧が働
き、他端からクランク室１１内のオイルミストが
入り、オイルミスト中の油滴は保油溝１３内に多
量に溜り、好ましい潤滑状態を維持することがで
き、第３図で示す優れた耐摩耗性を期待するこ
とができ、焼付のトラブルは皆無にできる。シリ
ンダーブロツクに直接バルブガイドを設けること
ができるため部品点数が減少し、製造コストは大
幅に低減する。 As explained above, according to the present invention, the cylinder is made of high-silicon aluminum, and the oil retaining groove consisting of a tightly wound spiral cutting mark is provided on the inner surface of the valve guide hole that is directly bored in the cylinder. 13 (or the valve guide hole), the oil mist in the crank chamber 11 enters from the other end, and a large amount of oil droplets in the oil mist accumulate in the oil retaining groove 13, which is preferable. A lubricated state can be maintained, excellent wear resistance as shown in FIG. 3 can be expected, and troubles such as seizure can be completely eliminated. Since the valve guide can be provided directly on the cylinder block, the number of parts is reduced and manufacturing costs are significantly reduced.
更に詳細に説明すると本考案では保油溝１３を
リーマ（タツプではない）の切削痕で形成し、保
油溝１３を密巻螺旋状に設けると共に、保油溝１
３の底１４及び隣接する保油溝１３，１３間の山
部１５を滑らかに連続した円弧状断面に成形して
いる。このように保油溝１３をリーマにより密巻
螺旋状、すなわちねじ用語で使われるところのリ
ードを小さく（バルブ中心に対するねじれ角を大
きく）したので、保油溝１３内をオイルが弁傘部
側へ多量に流出することを防止でき、室１１から
のオイル流入量が少ない場合でも、常に充分な量
のオイルを保油溝１３に溜めることができ、又オ
イルの浪費を防止できる。 To explain in more detail, in the present invention, the oil retaining groove 13 is formed by cutting marks of a reamer (not a tap), and the oil retaining groove 13 is provided in a tightly wound spiral shape.
The bottom 14 of 3 and the peak 15 between the adjacent oil retaining grooves 13, 13 are formed into a smoothly continuous arc-shaped cross section. In this way, the oil retaining groove 13 is made into a tightly wound spiral shape using a reamer, that is, the lead used in the thread terminology is made small (the helix angle with respect to the valve center is large), so that the oil inside the oil retaining groove 13 is formed on the side of the valve head. Even when the amount of oil flowing in from the chamber 11 is small, a sufficient amount of oil can always be stored in the oil retaining groove 13, and waste of oil can be prevented.
しかもバルブガイド孔内面の断面が波形で、底
１４及び山部１５の断面がそれぞれ円弧状であ
り、かつ前記リードが小さいので（各山部１５の
上下幅が小さいので）、前記充分な量のオイルは
山部１５の頂部まで拡がつてバルブガイド孔の内
面全体に油膜を形成する。又山部１５の断面が円
弧状であるので、吸気弁３が往復動を行う際に、
吸気弁軸部に付着したオイルを山部１５が掻き落
すことはない（又はほとんどない）。従つてバル
ブガイド孔内面に対する潤滑効果は高い。 Moreover, since the cross section of the inner surface of the valve guide hole is corrugated, the cross sections of the bottom 14 and the peaks 15 are each arcuate, and the leads are small (the vertical width of each peak 15 is small), the sufficient amount of The oil spreads to the top of the crest 15 and forms an oil film over the entire inner surface of the valve guide hole. In addition, since the cross section of the mountain portion 15 is arcuate, when the intake valve 3 reciprocates,
The mountain portion 15 does not (or almost never) scrapes off oil adhering to the intake valve shaft. Therefore, the lubricating effect on the inner surface of the valve guide hole is high.
一方、高硅素アルミニウムについて説明する
と、従来は該合金の素地をそのまま摺動面にした
場合、摺動面上の初晶硅素を取囲む共晶中のアル
ミニウム固溶体に凝着の生じる恐れがあり、その
ために実際には鍍金法による処理を施して上記固
溶体を別の金属や合金と置換し、摺動面を強化す
ることが必要とされている。ところが本考案によ
ると前述の如く潤滑効果が高いので、高硅素アル
ミニウムの素地をそのままバルブガイド孔内面と
して使用しても凝着が生じることはない。従つて
従来の強化処理を廃止でき、製造コストを低減で
きる。なおバルブガイド孔内面上のアルミニウム
固溶体が仮にわずかに摩耗しても、その後は高硬
度の初晶硅素が摺動面を形成するので摩耗の進行
は停止し、それまでと同様に安定したバルブガイ
ド作用を得ることができる。 On the other hand, regarding high-silicon aluminum, conventionally, if the base material of this alloy was used as a sliding surface as it was, there was a risk that adhesion would occur in the aluminum solid solution in the eutectic surrounding the primary silicon on the sliding surface. For this purpose, it is actually necessary to perform a plating process to replace the solid solution with another metal or alloy to strengthen the sliding surface. However, according to the present invention, since the lubrication effect is high as described above, adhesion will not occur even if the high-silicon aluminum base is used as it is as the inner surface of the valve guide hole. Therefore, the conventional strengthening treatment can be abolished, and manufacturing costs can be reduced. Even if the aluminum solid solution on the inner surface of the valve guide hole wears out slightly, the highly hard primary silicon forms a sliding surface, so the wear stops and the valve guide remains as stable as before. effect can be obtained.
そして本考案ではシリンダーブロツク１に高硅
素アルミニウムを使用し、バルブガイド孔内面に
前記保油溝１３を設けることにより、従来のブツ
シユからなるバルブガイドを廃止し、製造コスト
を低減できる。 In the present invention, by using high-silicon aluminum for the cylinder block 1 and providing the oil retaining groove 13 on the inner surface of the valve guide hole, the conventional valve guide consisting of a bush can be eliminated and manufacturing costs can be reduced.
第１図は本考案を適用した４サイクルエンジン
の縦断面部分図、第２図は第１図Ａ部分の拡大
図、第３図は摩耗量と運転時間の関係を示すグラ
フである。
１……シリンダーブロツク、２……バルブガイ
ド、１３……保油溝、１４……底、１５……山
部。
FIG. 1 is a vertical cross-sectional partial view of a four-cycle engine to which the present invention is applied, FIG. 2 is an enlarged view of portion A in FIG. 1, and FIG. 3 is a graph showing the relationship between wear amount and operating time. 1...Cylinder block, 2...Valve guide, 13...Oil retaining groove, 14...Bottom, 15...Mountain part.
Claims (1)
いはシリンダーヘツドにバルブガイド孔を明け、
高硅素アルミニウム素地で形成されるこのバルブ
ガイド孔の内面に密巻螺旋状のリーマ切削痕から
なる保油溝を設け、保油溝の底及び隣接する保油
溝間の山部を滑らかに連続した円弧状断面に成形
して上記バルブガイド孔の内面の断面を波形に
し、バルブガイド孔に吸気弁を嵌合し、吸気弁の
被駆動側端部をオイルミストを有する室に突出さ
せたことを特徴とする４サイクルエンジンの吸気
バルブガイド。 Drill a valve guide hole in the cylinder or cylinder head made of high silicon aluminum,
The inner surface of this valve guide hole, which is made of high-silicon aluminum material, is provided with an oil retaining groove made of tightly wound spiral reamer cutting marks, and the bottom of the oil retaining groove and the peaks between adjacent oil retaining grooves are smoothly continuous. The inner surface of the valve guide hole is formed to have a corrugated cross section, and the intake valve is fitted into the valve guide hole, and the driven end of the intake valve projects into the chamber containing the oil mist. An intake valve guide for 4-stroke engines featuring the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978084842U JPS624643Y2 (en) | 1978-06-20 | 1978-06-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978084842U JPS624643Y2 (en) | 1978-06-20 | 1978-06-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS551944U JPS551944U (en) | 1980-01-08 |
| JPS624643Y2 true JPS624643Y2 (en) | 1987-02-03 |
Family
ID=29007911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1978084842U Expired JPS624643Y2 (en) | 1978-06-20 | 1978-06-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS624643Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5791613U (en) * | 1980-11-26 | 1982-06-05 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS461254A (en) * | 1970-02-18 | 1971-09-17 |
-
1978
- 1978-06-20 JP JP1978084842U patent/JPS624643Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS461254A (en) * | 1970-02-18 | 1971-09-17 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS551944U (en) | 1980-01-08 |
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