JPS616419A - Connecting rod - Google Patents
Connecting rodInfo
- Publication number
- JPS616419A JPS616419A JP59128223A JP12822384A JPS616419A JP S616419 A JPS616419 A JP S616419A JP 59128223 A JP59128223 A JP 59128223A JP 12822384 A JP12822384 A JP 12822384A JP S616419 A JPS616419 A JP S616419A
- Authority
- JP
- Japan
- Prior art keywords
- connecting rod
- small end
- alloy
- flame spraying
- thick
- 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
- 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
- F16C33/06—Sliding surface mainly made of metal
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
-
- 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
- F16C2204/00—Metallic materials; Alloys
- F16C2204/60—Ferrous alloys, e.g. steel alloys
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はレシプロエンジンのコネクティングロッドに関
するもので、詳しくは小端部にブツシュを使用しない軽
量化コネクティングロッドに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a connecting rod for a reciprocating engine, and more particularly to a lightweight connecting rod that does not use a bushing at the small end.
レシプロエンジンのピストンピンとクランクシャフトを
連結するコネクティングロッド（以下コンロッドという
）は、軽量でしかも一定の強度が必要とされているが、
通常は第２図に示すように、コンロッド２０の大端部２
３はコンロノド本体２３ ａとフンロッドキャップ２３
ｂに２分割された形となっており、コンロッドベアリン
グメタル２４を介して、クランクシャフトにテンション
ボルト２５によって組み付けられており、一方小端部２
１はピストンに組み付けられたピストンピンにベアリン
グであるブツシュ２２を介して組み付けられている。コ
ンロノド小端部とピストンピンとの間で揺動運動をする
フルフロート型式のものは、コンロッド小水部に銅系の
バイメタルブツシュを圧入している。The connecting rod (hereinafter referred to as connecting rod) that connects the piston pin and crankshaft of a reciprocating engine is required to be lightweight and have a certain level of strength.
Usually, as shown in FIG.
3 is the stove top body 23 a and the funnel rod cap 23
It is assembled to the crankshaft with a tension bolt 25 via a connecting rod bearing metal 24, while the small end 2
1 is attached to a piston pin attached to a piston via a bushing 22 which is a bearing. The full-float type, which swings between the small end of the connecting rod and the piston pin, has a copper-based bimetallic bushing press-fitted into the connecting rod small water section.
このブツシュは通常厚さ１．５〜２ｍで、低炭素鋼上に
厚さ２００μｍ程度のＣｕ−８％Ｐｂ−４％Ｓｎなどの
合金を焼結したものが用いられている。This bushing usually has a thickness of 1.5 to 2 m, and is made by sintering an alloy such as Cu-8%Pb-4%Sn with a thickness of about 200 μm on low carbon steel.
従来のコンロッドは上記のように小端部にブツシュが圧
入されるため、コンロッド小端部の強度を確保するため
に大きくしなければならず、そのため重くなっている。In conventional connecting rods, the bushing is press-fitted into the small end as described above, so the small end of the connecting rod must be made large to ensure strength, which makes it heavy.
また軽量化するために単にブツシュを使用しない構造と
するとコンロッド小端部とピストンピンの間で焼き付き
が生じる。Furthermore, if a structure is adopted that simply does not use bushings in order to reduce weight, seizure will occur between the connecting rod small end and the piston pin.
本発明は軽相でかつブツシュと同等の軸受性能を有する
コンロッドを提供することを目的とするものである。An object of the present invention is to provide a connecting rod that is light in phase and has bearing performance equivalent to that of a bush.
上記問題を解決するために、本発明はレシプロエンジン
のコンロッド小端部摺動面にＰｂ５〜２７重量％、Ｓｎ
２〜１２重景チ及び残部ＣＩ７からなるＣｕ −Ｐｂ−
Ｓｎ系合金の溶射層を２０ μｍ以上の厚さに形成した
ことを特徴とする。In order to solve the above-mentioned problems, the present invention has been developed to apply 5 to 27% by weight of Pb and Sn to the sliding surface of the small end of the connecting rod of a reciprocating engine.
Cu -Pb- consisting of 2 to 12 heavy view points and the remainder CI7
It is characterized by forming a sprayed layer of Sn-based alloy to a thickness of 20 μm or more.
コンロッドを形成する素材としては、通常の鋼材が用い
られる。Ordinary steel is used as the material for forming the connecting rod.
Ｃｕ Ｐｂ−Ｓｎ系合金の各成分を限定した理由は次の
とおりである（なお、以下チはすべて重量％を示す。）
。The reasons for limiting each component of the CuPb-Sn alloy are as follows (all ``H'' below indicates weight %).
.
Ｐｂについては゛、Ｐｂ量の増加に従い耐焼付性は向上
するが、Ｐｂ−ｆｉｇが２７．０％を越えると、耐摩耗
性及び機械的強度が低下する。またＰｂ量が５チ未満で
は耐焼付性が向上しない。よってＰｂ量は５〜２７チと
した。Regarding Pb, the seizure resistance improves as the amount of Pb increases, but when Pb-fig exceeds 27.0%, the wear resistance and mechanical strength decrease. Furthermore, if the amount of Pb is less than 5 inches, the seizure resistance will not improve. Therefore, the amount of Pb was set to 5 to 27 inches.
Ｓｎについてｈ、Ｓｎ量の増加に従い強度が向上するが
、Ｓｎ ４１が１２％を越えると靭性が低下し、またＳ
ｎ量が増加するにつれ高価になる。Ｓｎ量が２チ未満で
は強度が不充分である。よってＳｎ量は２〜１２％とし
た。As for Sn, strength improves as the amount of Sn increases, but when Sn41 exceeds 12%, toughness decreases, and
As the amount of n increases, it becomes more expensive. If the amount of Sn is less than 2, the strength will be insufficient. Therefore, the amount of Sn was set to 2 to 12%.
なお、ＣＬＩ −Ｐｂ −Ｓｎ系合金は不純物としてＺ
ｎ。Note that the CLI-Pb-Sn alloy contains Z as an impurity.
n.
Ｆｅ々どの元素を４チまでは含んでもよい。It may contain up to four elements such as Fe.
摺動面のＣｕ −Ｐｂ −Ｓｎ系合金の溶射層の厚さを
２０μｍ以上とした理由は、厚さが２０μｍ未満である
と摩耗寿命が不足するからである。厚さは１５０〜２０
０μｍが望ましい。The reason why the thickness of the sprayed layer of Cu-Pb-Sn alloy on the sliding surface is set to 20 μm or more is that if the thickness is less than 20 μm, the wear life will be insufficient. Thickness is 150-20
0 μm is desirable.
コンロッド小端部１０は第１図に示すように、小端部摺
動面にＣｕ −Ｐｂ−Ｓｎ系合金溶射層１１を設けた構
造であるため、この摺動部はブツシュど同等以上の耐焼
付性を示し、プツシ−を必要としないことから、小端部
１０を小さくすることができ、コンロッドを軽量化する
ことができる。As shown in FIG. 1, the connecting rod small end 10 has a structure in which a Cu-Pb-Sn alloy sprayed layer 11 is provided on the sliding surface of the small end, so this sliding part has a durability equal to or higher than that of a bushing. Since it exhibits seizability and does not require a pusher, the small end 10 can be made smaller and the weight of the connecting rod can be reduced.
本発明を実施例及び試験例により説明する。 The present invention will be explained by Examples and Test Examples.
実施例
ｍ４ｔｓｓｓｓ製のコンロッドの小端部１０の円筒部内
面にＰｂ８％、Ｓｎ４％、Ｚｎ（１５％、Ｆｅ ＣＬ
１ ％及び残部ＣｕからなるＣＬＩ −Ｐｂ−Ｓｎ系合
金を、メテコ社製のプラズマ溶射装置を用いて溶射して
、厚ｉ２００μｍのＣｕ−Ｐｂ−Ｓｎ系合金の溶射層１
１を形成する。その後、この合金溶射層１１を機械加工
によシ精密仕上して、厚さ１５０μｍとする。このよう
にして軸受性能が良好で軽量化されたコンロッドを得る
。Example 8% Pb, 4% Sn, Zn (15%, Fe CL
A CLI-Pb-Sn alloy consisting of 1% Cu and the remainder Cu was sprayed using a plasma spraying device manufactured by Metco to form a sprayed layer 1 of Cu-Pb-Sn alloy with a thickness of 200 μm.
form 1. Thereafter, this alloy sprayed layer 11 is precisely finished by machining to a thickness of 150 μm. In this way, a connecting rod with good bearing performance and reduced weight is obtained.
試験例 耐焼付性の試験は試験機により次のように行った。Test example The seizure resistance test was conducted using a testing machine as follows.
鋼材８８５５製の長さ３０ス幅３むへ厚さ５鵡の平板を
用意し、これに実施例１と同様にＰｂ８％、Ｓｎ４％、
Ｚｎα５％、ｐｅｏ、１％及び残部ＣｕからなるＣｕ
−Ｐｂ −Ｓｎ系合金を溶射して溶射層を形成し、機械
研削加工して上記合金溶射層の厚さを１５０μｍとし、
本発明の試験片Ａとした。A flat plate made of steel material 8855 with a length of 30 mm and a width of 3 mm and a thickness of 5 mm was prepared, and as in Example 1, 8% Pb, 4% Sn,
Cu consisting of 5% Znα, 1% peo, and the balance Cu
-Pb-Sn based alloy is thermally sprayed to form a thermal sprayed layer, and the thickness of the alloy thermal sprayed layer is 150 μm by mechanical grinding,
This was designated as test piece A of the present invention.
次に上記平板にｐｂ８％、Ｓｎ４％、Ｚｎ１％、残部Ｃ
ｕよシなるＣｏ Ｐｂ Ｓｎ系焼結合金層を形成し、機
械研削加工して上記焼結金層の厚さを１５０μｍとし、
従来のプツシ−に相当する試験片Ｂとした。Next, the above flat plate was coated with 8% Pb, 4% Sn, 1% Zn, and the balance C.
A Co Pb Sn-based sintered alloy layer is formed and machined to a thickness of 150 μm,
It was designated as test piece B, which corresponds to a conventional push-piece.
そして、無処理の上記平板を比較材として試験片Ｃとし
た。Then, the untreated flat plate was used as a test piece C as a comparison material.
試験片Ａをピスト／ピンに相当する部材であるクロム鋼
８Ｃｒ ２２Ｈ製、外径２’Ａ６ｔａｎ、内径２０．０
門、厚さ１６咽の円筒；１に浸炭焼入材の端面に接する
ように設置し、次いでこの接触面に潤滑油としてキャッ
スルモーターオイル５ＡＥ５Ｗ−３０をイ（（給し、試
験片を回転させながら荷重を１（ｌｋりから５００ｋｇ
′ｉで変化させて焼付限度荷重を測定した。試験片Ｂ及
び試験片Ｃも試験片Ａと同様ＩＺｃして焼付限度荷重を
測定した。Test piece A is a member corresponding to a piston/pin made of chrome steel 8Cr 22H, outer diameter 2'A6 tan, inner diameter 20.0.
The gate, a cylinder with a thickness of 16 mm, was installed so as to be in contact with the end surface of the carburized and quenched material, and then Castle Motor Oil 5AE5W-30 was applied as a lubricant to this contact surface, and while rotating the test piece. The load is 1 (from 1k to 500kg)
The seizure limit load was measured by changing the value of i. Test piece B and test piece C were also subjected to IZc in the same manner as test piece A to measure the seizure limit load.
試験結果を表に示す。The test results are shown in the table.
表 焼付限度荷重の試験結果
この試験結果から分かるように、プツシ−を単に廃止し
た場合に相当する比較材の試験片Ｃの焼付限度荷重１ｔ
２００に７で、従来のブツシュ材に相当する試験片Ｂの
焼付限度荷重４５０ ｋｇより著しく低い値であった。Table: Seizing limit load test results.
It was 7 out of 200, which was significantly lower than the seizure limit load of 450 kg for test piece B, which corresponds to a conventional bushing material.
したがって、単純にブツシュ−を廃止することはできな
い。しかし、本発明の、ＣＩｌ −ＰＩ） −Ｓｎ系合
金の溶射層を有する小端部に相当する試験片Ａは荷重５
００ ｋｙでも焼付は発生せず、従来のブツシュ材以上
の耐焼付性を示すことから、本発明のフンロッドを使用
すればブツシュを使用する必要がないことが分かる。Therefore, it is not possible to simply abolish the bushing. However, the test piece A corresponding to the small end portion having a sprayed layer of CIl-PI)-Sn based alloy of the present invention had a load of 5
Since seizure did not occur even at 0.00 ky and showed better seizure resistance than conventional bushing materials, it can be seen that there is no need to use a bushing if the Hun rod of the present invention is used.
上記のように、本発明のコンロッドは、小端部にブツシ
ュを使用する必要がないので、小端部を小さくすること
ができ、コンロッドの重量を２０〜４０ｇ低減できる。As described above, since the connecting rod of the present invention does not require the use of a bushing at the small end, the small end can be made smaller and the weight of the connecting rod can be reduced by 20 to 40 g.
このことは、エンジン全体の軽量化に寄与するとともに
、慣性重量の低減によりクランクシャフトの細径化にも
役立つ。更に従来の焼結ブツシュに比較して耐焼付性も
向上する。This not only contributes to reducing the overall weight of the engine, but also helps reduce the diameter of the crankshaft by reducing inertial weight. Furthermore, seizure resistance is improved compared to conventional sintered bushings.
第１図は一実施例のコネクティングロッドの小端部を示
す断面図、
第２図は従来のコネクティングロッドを示す平面図を表
わす。
図中。
１０・−・小端部 １１・・・合金溶射層２０−
コンロッド ２１・・・小端部２２・・・ブツシュ
２３・−・木端部２４・−・コンロッドベアリング
メタル２５・・・テンシュンボルトFIG. 1 is a sectional view showing the small end of a connecting rod according to one embodiment, and FIG. 2 is a plan view showing a conventional connecting rod. In the figure. 10... Small end 11... Alloy sprayed layer 20-
Connecting rod 21... Small end 22... Bush
23... Wood end 24... Connecting rod bearing metal 25... Tensun bolt
Claims (1)
量％及び残部ＣｕからなるＣｕ−Ｐｂ−Ｓｎ系合金の溶
射層を２０μｍ以上の厚さに形成せしめたことを特徴と
するレシプロエンジンのコネクティングロッド。A reciprocating engine characterized in that a thermal sprayed layer of a Cu-Pb-Sn alloy consisting of 5 to 27% by weight of Pb, 2 to 12% by weight of Sn, and the balance Cu is formed on the small end sliding surface to a thickness of 20 μm or more. connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59128223A JPS616419A (en) | 1984-06-21 | 1984-06-21 | Connecting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59128223A JPS616419A (en) | 1984-06-21 | 1984-06-21 | Connecting rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS616419A true JPS616419A (en) | 1986-01-13 |
Family
ID=14979536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59128223A Pending JPS616419A (en) | 1984-06-21 | 1984-06-21 | Connecting rod |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS616419A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996004485A1 (en) * | 1994-08-01 | 1996-02-15 | Gerold Pankl | Connecting rod |
| JP2839710B2 (en) * | 1991-02-04 | 1998-12-16 | エム、エー、エヌ、ビー アンド ダブリュ、ディーゼル、アクチセルスカブ | Crosshead for piston engine |
| US9599148B2 (en) | 2011-10-17 | 2017-03-21 | Mahle International Gmbh | Thermal spray coating for connecting rod small end |
-
1984
- 1984-06-21 JP JP59128223A patent/JPS616419A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2839710B2 (en) * | 1991-02-04 | 1998-12-16 | エム、エー、エヌ、ビー アンド ダブリュ、ディーゼル、アクチセルスカブ | Crosshead for piston engine |
| WO1996004485A1 (en) * | 1994-08-01 | 1996-02-15 | Gerold Pankl | Connecting rod |
| US9599148B2 (en) | 2011-10-17 | 2017-03-21 | Mahle International Gmbh | Thermal spray coating for connecting rod small end |
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