JPH0819951B2 - Sliding member of internal combustion engine - Google Patents
Sliding member of internal combustion engineInfo
- Publication number
- JPH0819951B2 JPH0819951B2 JP31537187A JP31537187A JPH0819951B2 JP H0819951 B2 JPH0819951 B2 JP H0819951B2 JP 31537187 A JP31537187 A JP 31537187A JP 31537187 A JP31537187 A JP 31537187A JP H0819951 B2 JPH0819951 B2 JP H0819951B2
- Authority
- JP
- Japan
- Prior art keywords
- connecting rod
- layer
- internal combustion
- sliding member
- combustion engine
- 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 - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
- F16C9/04—Connecting-rod bearings; Attachments thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/20—Sliding surface consisting mainly of plastics
- F16C33/201—Composition of the plastic
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Sliding-Contact Bearings (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、内燃機関で使用される摺動部材に関する。TECHNICAL FIELD The present invention relates to a sliding member used in an internal combustion engine.
（従来の技術） 内燃機関で使用される部材で摺動面をもつものは、耐
熱性と耐摩耗性が要求されるため、従来、鉄系合金鋼の
表面に浸炭処理を施したものが使用されていた。(Prior Art) Since a member used in an internal combustion engine having a sliding surface is required to have heat resistance and wear resistance, conventionally, a ferrous alloy steel whose surface is carburized is used. It had been.
（発明が解決しようとする問題点） しかしながら、前記のような材料では、最近の高速回
転をする内燃機関で使用される連接杆すなわちコンロッ
ドなどの部材としては不充分になってきており、より軽
い上に優れた耐熱性及び耐摩耗性を有する摺動部材が要
求されている。(Problems to be Solved by the Invention) However, the materials described above are becoming insufficient as members such as connecting rods, that is, connecting rods used in recent internal combustion engines that rotate at high speed, and are lighter. There is a demand for a sliding member having excellent heat resistance and wear resistance.
このような用途に適する材料としては、チタン又はチ
タン合金があるが、これらのチタン材は、いわゆるかじ
り性が大きいため相手部材の摩耗を速める欠点があり、
これを改善するためにチタン材の表面にNiメッキなどを
施しても、Niメッキ層は比較的摩耗し易い剥げ易い欠点
がある。Materials suitable for such applications include titanium or titanium alloys, but these titanium materials have the drawback of accelerating wear of the mating member due to their large so-called galling property,
Even if the surface of the titanium material is plated with Ni to improve this, the Ni plated layer has a drawback that it is relatively easily worn and easily peeled off.
したがって、チタン材の軽量、耐熱性等の利点を保有
しながら、良好な摺動性をもつ部材を得ることが望まれ
ていた。Therefore, it has been desired to obtain a member having good slidability while maintaining the advantages of the titanium material such as light weight and heat resistance.
（問題点を解決するための手段） 本発明は、上記の事情に鑑み、その問題点を解決すべ
くなされたもので、その手段は、チタン又はチタン合金
製の摺動部材の摺動面にNiメッキを施し、Niメッキ層の
表面にショットピーニングを施して凹凸面を形成した
後、フッ素系樹脂コーティングを施したことを特徴とす
る。(Means for Solving Problems) The present invention has been made in view of the above circumstances to solve the problems, and the means is to provide a sliding surface of a sliding member made of titanium or titanium alloy. It is characterized in that it is Ni-plated, shot-peened on the surface of the Ni-plated layer to form an uneven surface, and then coated with a fluororesin.
（作 用） 上記の手段を用いたため、ショットピーニングによっ
て、Ni層表面に微細な凹凸が形成されて樹脂コーティン
グ層の接着性が向上し、樹脂層の剥がれが防止される。
またショットピーニングによりNi層の表面に圧縮残留応
力が発生し、Ni層の疲労強度が向上するため該層の耐剥
離性を向上することができる。フッ素樹系脂層は、耐摩
耗性をもつ摺動部材として作用するほかに、若干の緩衝
作用を呈し、摺動面に微小な段差があってもこれにより
かじり又は摩耗が発生するのを防止することができる。(Operation) Since the above means is used, fine unevenness is formed on the surface of the Ni layer by shot peening, the adhesiveness of the resin coating layer is improved, and peeling of the resin layer is prevented.
Also, compressive residual stress is generated on the surface of the Ni layer due to shot peening, and the fatigue strength of the Ni layer is improved, so that the peel resistance of the layer can be improved. The fluorinated resin layer not only acts as a sliding member with abrasion resistance, but also exhibits a slight cushioning effect to prevent galling or wear due to minute steps on the sliding surface. can do.
（実施例） 以下本発明の実施例を図面によって説明する。第１図
はＶ型４気筒４サイクルエンジンの要部を切断したもの
で、本発明は該エンジンのコンロッドの大端部に実施さ
れており、隣接する二個の大端部同士及び大端部とクラ
ンクウエブ間の摺動性を向上させている。Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a V-type 4-cylinder 4-cycle engine with a main part cut off. The present invention is carried out on the large end of the connecting rod of the engine. The slidability between the crank web and the crank web is improved.
同図において符号１はクランクケース、２はクランク
シャフト、３はシリンダで該シリンダ３は片側の２個の
みが示されている。４はシリンダ３内に摺動自在に嵌装
されたピストン、５はピストン４の往復動をクランクシ
ャフト２に伝えるコンロッド、６はクランクシャフト２
の回転をカムシャフト７に伝えるカムギヤ群である。そ
して、上記コンロッド５に本発明が実施されている。In the figure, reference numeral 1 is a crank case, 2 is a crank shaft, 3 is a cylinder, and only two cylinders 3 are shown on one side. 4 is a piston slidably fitted in the cylinder 3, 5 is a connecting rod for transmitting the reciprocating motion of the piston 4 to the crankshaft 2, 6 is the crankshaft 2
Is a cam gear group that transmits the rotation of the camshaft to the camshaft 7. The present invention is applied to the connecting rod 5.
このコンロッド５は、クランクシャフト２の左右のク
ランクピン2a、2aに２個ずつ、互いの大端部10が接し、
かつクランクウエブの側面2b、2bに接するよう隣合わせ
て配備されており、これら隣り合うコンロッド５同士
は、所定の挟み角を以て配備される２つのシリンダのそ
れぞれのピストン４に連結される。The connecting rod 5 has two left and right crank pins 2a, 2a of the crankshaft 2, and the large ends 10 of the connecting rods 5 are in contact with each other.
Further, the connecting rods 5 are arranged next to each other so as to contact the side surfaces 2b, 2b of the crank web, and the connecting rods 5 adjacent to each other are connected to the pistons 4 of the two cylinders arranged at a predetermined sandwiching angle.
コンロッド５は、第２図に示すように、クランクシャ
フト２に連結される大端部10と、ピストン４にピストン
ピンを介して連結される小端部11と、両端部10、11を連
結する幹部12によって構成されている。大端部10は、小
端部11および幹部12が一体化されたロッド13の開口側
に、キャップ14をボルト15で固定することによって構成
されていて、その内周面には、ホワイトメタル等の軟か
い材料からなる半円弧状の軸受メタル（図示せず）が嵌
め合わされている。As shown in FIG. 2, the connecting rod 5 connects the large end 10 connected to the crankshaft 2, the small end 11 connected to the piston 4 via a piston pin, and the both ends 10, 11. It is composed of executives 12. The large end portion 10 is configured by fixing a cap 14 with a bolt 15 on the opening side of a rod 13 in which the small end portion 11 and the trunk portion 12 are integrated, and the inner peripheral surface thereof has a white metal or the like. A semi-circular bearing metal (not shown) made of a soft material is fitted.
そして、上記コンロッド５は、チタンあるいはチタン
合金（Ti−6Al−4V）によって作られ、大端部を形成す
るロッド13とキャップ14の側部表面10aには第３図に示
すようにNiメッキが施されてNiメッキ層P1、P2が形成さ
れ、その表面にはショットピーニングが施されて微細な
凹凸面P11、P21が形成され、さらにその上にはフッ素系
樹脂系コーティング層C1、C2が形成されている。上記Ni
メッキ層P1、P2の厚さは20μｍ内外、フッ素系樹脂コー
ティング層C1、C2の厚さt1は60μｍ内外が好ましく、あ
まり厚くすると却って剥れ易い。The connecting rod 5 is made of titanium or a titanium alloy (Ti-6Al-4V), and the side surface 10a of the rod 13 and the cap 14 forming the large end is plated with Ni as shown in FIG. Ni plating layers P 1 and P 2 are formed on the surface, shot peening is performed on the surface to form fine uneven surfaces P 11 and P 21 , and a fluorine resin coating layer C is further formed on the surface. 1 , C 2 are formed. Ni above
The thickness of the plating layers P 1 and P 2 is preferably 20 μm inside / outside, and the thickness t 1 of the fluororesin coating layers C 1 and C 2 is preferably 60 μm inside / outside.
上記コンロッド５においては、樹脂コーティング層
C1、C2によって摺動性が向上してかじり、焼付等が生じ
ることは防止され、さらに樹脂コーティング層C1、C2の
剛性が低く適度の柔軟性を有するため、なじみ性がよ
く、また局部面圧（エッジロード）が加わる場合でも、
コーティング層C1、C2の変形により、チタンあるいはチ
タン合金母材へ加わる面圧を下げることができる。この
コーティング層に二硫化モリブデンなどの潤滑材を含浸
させることにより動摩擦係数を減少させ耐久性を更に向
上させることができる。In the connecting rod 5, a resin coating layer
Sliding property is improved by C 1 and C 2 to prevent galling, seizure, etc., and the resin coating layers C 1 and C 2 have low rigidity and appropriate flexibility, and thus have good conformability. In addition, even if local surface pressure (edge load) is applied,
The deformation of the coating layers C 1 and C 2 can reduce the surface pressure applied to the titanium or titanium alloy base material. By impregnating this coating layer with a lubricant such as molybdenum disulfide, the dynamic friction coefficient can be reduced and the durability can be further improved.
例えば、第２図に示すような２つ割りコンロッド５の
場合、ロッド13とキャップ14の合わせ部には、面一とな
るよう高精度で突き合わせたとしても、第３図に示すよ
うに６μｍ程度のギャップt0が生じるのは避け難い。と
ころが本発明のコンロッド５の場合、側部コーティング
層C1、C2の厚さt1が60μｍ程度に設定されているため、
隣接するコンロッド部材又はクランクウエブＺから側圧
が加わる場合でも、ロッド13あるいはキャップ14のう
ち、側方へ突き出ている側のコーティング層C1が変形し
て該コーティング層C1の厚さが僅かに減少すれば、隣接
する部材Ｚが他側のコーティング層C2に接触することと
なる。したがって極度の片当りが防止できる。For example, in the case of the split connecting rod 5 as shown in FIG. 2, even if the rod 13 and the cap 14 are abutted with high accuracy so as to be flush with each other, as shown in FIG. It is unavoidable that a gap t 0 of γ occurs. However, in the case of the connecting rod 5 of the present invention, since the thickness t 1 of the side coating layers C 1 and C 2 is set to about 60 μm,
Even when lateral pressure is applied from the adjacent connecting rod member or crank web Z, the coating layer C 1 on the side of the rod 13 or the cap 14 that projects laterally is deformed and the thickness of the coating layer C 1 is slightly reduced. If it decreases, the adjacent member Z comes into contact with the coating layer C 2 on the other side. Therefore, it is possible to prevent extreme one-sided contact.
上述のことから本発明のコンロッド５は耐摩耗性およ
び片当りに対する耐久性が高まる。このことは、第４
図、第５図に示すように、従来のものとの比較において
も明らかである。From the above, the connecting rod 5 of the present invention has improved wear resistance and durability against one-sided contact. This is the fourth
As shown in FIG. 5 and FIG. 5, it is also clear in comparison with the conventional one.
第４図は焼付に至る摺動時間、第５図は焼付が生じる
荷重を、従来の浸炭鋼のコンロッドＡとフッ素系樹脂コ
ーティング層を有するコンロッドＢについて実験した結
果を示すもので、コンロッドＡは27kg程度の荷重で約10
分で焼付が始まるが、コンロッドＢは、50時間以上焼付
が生ぜず、かつ前記荷重以上の高荷重に耐えることがで
きる。Fig. 4 shows the sliding time leading to seizure, and Fig. 5 shows the results of experiments on the load that causes seizure for the conventional carburized steel connecting rod A and connecting rod B having a fluororesin coating layer. About 10 with a load of about 27 kg
Although seizure starts in minutes, the connecting rod B does not seize for 50 hours or more and can withstand a high load equal to or higher than the above load.
また。オイル切れの状態で摺動させた実験でも、樹脂
コーティング層が破損してもNi層の存在により、チタン
材が直接摺動するものに比べ焼付時間が長く、浸炭鋼に
よるものと同程度の焼付時間であった。Also. Even in an experiment in which sliding was performed with oil running out, even if the resin coating layer was damaged, due to the presence of the Ni layer, the seizure time is longer than that of the titanium material that directly slides, and the seizure is similar to that of carburized steel. It was time.
（発明の効果） 本発明は、以上のようにフッ素系樹脂コーティングに
よりチタン材に欠けていた摺動性、なじみ性等を向上さ
せたから、軽量のチタン材を摺動部をもつ運動部材とし
て使用することができ、高速化のために軽量であること
を必要とする部品としてのチタン材の用途を拡大するこ
とができる。しかも、チタン材の摺動面にNiメッキを施
し、Niメッキを施し、Niメッキ層の表面にショットピー
ニングを施して凹凸面を形成した後、フッ素系樹脂コー
ティングを施したので、該凹凸面によってフッ素系樹脂
コーティング層の接着力を増大させ、該コーティング層
の該Ni層からの耐剥離性を向上させると共に、ショット
ピーニングによりNi層の表面に圧縮残留応力が発生し、
Ni層の疲労強度が向上するために、該Ni層のチタン材か
らの耐剥離性が向上し、コンロッドの耐久性を向上させ
る。(Effects of the Invention) Since the present invention improves the slidability, conformability, etc., which were lacking in the titanium material by the fluorine resin coating as described above, a lightweight titanium material is used as a motion member having a sliding portion. Therefore, the use of the titanium material as a component that needs to be lightweight for speeding up can be expanded. Moreover, the sliding surface of the titanium material is Ni-plated, Ni-plated, and the surface of the Ni-plated layer is subjected to shot peening to form an uneven surface, and then a fluorine resin coating is applied. Increasing the adhesive force of the fluorine-based resin coating layer, and improving the peel resistance from the Ni layer of the coating layer, compressive residual stress occurs on the surface of the Ni layer by shot peening,
Since the fatigue strength of the Ni layer is improved, the resistance to peeling of the Ni layer from the titanium material is improved, and the durability of the connecting rod is improved.
また、特にコンロッドの大端部のように摺動面に段差
の生じることが避けられない部材においては、樹脂コー
ティング層の緩衝性によって段差部の片当りを防止で
き、該段差部及びこれに摺接する部材の摩耗及び衝撃を
防止することができる。Further, particularly in a member such as a large end portion of a connecting rod in which a step difference is unavoidable on the sliding surface, it is possible to prevent uneven contact of the step portion due to the buffering property of the resin coating layer. It is possible to prevent wear and impact of the contacting members.
第１図は本発明を実施したコンロッドをもつ内燃機関の
縦断面図、第２図は該コンロッドの分解斜面図、第３図
は摺動部の断面図、第４図、第５図は性能比較線図であ
る。 P1、P2……Niメッキ層 P11、P21……凹凸面 C1、C2……フッ素系樹脂コーティング層1 is a longitudinal sectional view of an internal combustion engine having a connecting rod embodying the present invention, FIG. 2 is an exploded perspective view of the connecting rod, FIG. 3 is a sectional view of a sliding portion, and FIGS. 4 and 5 are performances. It is a comparison diagram. P 1 , P 2 …… Ni plating layer P 11 , P 21 …… Rough surface C 1 , C 2 …… Fluorine resin coating layer
Claims (1)
面にNiメッキを施し、Niメッキ層の表面にショットピー
ニングを施して凹凸面を形成した後、フッ素系樹脂コー
ティングを施したことを特徴とする、内燃機関の摺動部
材。1. A sliding member made of titanium or a titanium alloy is plated with Ni, and the surface of the Ni plated layer is subjected to shot peening to form an uneven surface, and then a fluorine resin coating is applied. A sliding member for an internal combustion engine, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31537187A JPH0819951B2 (en) | 1987-12-15 | 1987-12-15 | Sliding member of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31537187A JPH0819951B2 (en) | 1987-12-15 | 1987-12-15 | Sliding member of internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01158217A JPH01158217A (en) | 1989-06-21 |
| JPH0819951B2 true JPH0819951B2 (en) | 1996-03-04 |
Family
ID=18064604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31537187A Expired - Fee Related JPH0819951B2 (en) | 1987-12-15 | 1987-12-15 | Sliding member of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0819951B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2268982B (en) * | 1992-07-21 | 1996-03-13 | Dowty Aerospace Gloucester | Bearings |
| AT1151U1 (en) * | 1994-08-01 | 1996-11-25 | Pankl Gerold Ing | CONNECTING ROD |
| AT1150U1 (en) * | 1995-07-20 | 1996-11-25 | Pankl Gerold Ing | CONNECTING ROD |
| DE10062876C1 (en) * | 2000-12-16 | 2002-04-18 | Ks Gleitlager Gmbh | Connecting rod bearing shell for connecting rod of titanium or titanium alloy has supporting layer of steel material, and on back of support layer has coating of tin-bronze material with thickness of 10-50 micrometers |
| US9682309B2 (en) | 2014-11-26 | 2017-06-20 | Razor Usa Llc | Powered wheeled board |
| WO2023112765A1 (en) * | 2021-12-16 | 2023-06-22 | パナソニックＩｐマネジメント株式会社 | Lead terminal, production method therefor, and solid electrolytic capacitor |
-
1987
- 1987-12-15 JP JP31537187A patent/JPH0819951B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01158217A (en) | 1989-06-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |