JPH07279942A - Connecting rod - Google Patents
Connecting rodInfo
- Publication number
- JPH07279942A JPH07279942A JP6071932A JP7193294A JPH07279942A JP H07279942 A JPH07279942 A JP H07279942A JP 6071932 A JP6071932 A JP 6071932A JP 7193294 A JP7193294 A JP 7193294A JP H07279942 A JPH07279942 A JP H07279942A
- Authority
- JP
- Japan
- Prior art keywords
- connecting rod
- small end
- big end
- stem portion
- sintered alloy
- 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
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
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/02—Constructions of connecting-rods with constant length
- F16C7/023—Constructions of connecting-rods with constant length for piston engines, pumps or the like
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、コンロッドに関し、特
に、焼結により製造されたコンロッドに関する。FIELD OF THE INVENTION This invention relates to connecting rods, and more particularly to connecting rods made by sintering.
【０００２】[0002]
【従来の技術】一般に、レシプロエンジンには、ピスト
ンとクランクシャフトとを連結するためにコンロッド
（connecting rod) が使用されている。コンロッドは、
圧縮力、引張力、曲げなどの荷重を繰り返し受けるの
で、これらに十分耐える強度と剛性が必要となる。2. Description of the Related Art Generally, a reciprocating engine uses a connecting rod for connecting a piston and a crankshaft. Connecting rod
Since compressive force, tensile force, bending, and other loads are repeatedly applied, sufficient strength and rigidity to withstand these are required.
【０００３】このようなコンロッドの製法としては、鉄
系焼結合金またはアルミニウム系焼結合金粉末に鍛造・
焼結処理を行った後、スモール・エンド、ビッグ・エン
ドに穿設された穴の内面にリーマ仕上げを施し、その穴
にシェル形ニードル・ベアリングが圧入され固定するよ
うにした技術が知られている（例えば、特開昭６３−１
２８１０２号公報、実開平２−４０１９号公報参照）。As a method of manufacturing such a connecting rod, iron-based sintered alloy or aluminum-based sintered alloy powder is forged and
A technology is known in which after the sintering process, the inner surface of the holes drilled in the small end and big end is reamed and the shell type needle bearing is press-fitted and fixed in the hole. (For example, JP-A-63-1
No. 28102, Japanese Utility Model Publication No. 2-4019).
【０００４】ところで、このようなコンロッドにおいて
は、機械的強度を大きくしコンロッド自身の重量を軽く
するために、ステム部を略Ｉ型断面（薄肉部）に形成し
ているのが普通である。図３及び図４は、そのような従
来のコンロッドの側面図、縦断面図を示したものであ
る。前記従来のコンロッド１０は、その素材として鉄系
焼結合金またはアルミニウム系焼結合金で製作され、ピ
ストン・ピンに連結されるスモール・エンド１１と、ク
ランクシャフトのクランク・ピンに連結されるビッグ・
エンド１２と、前記スモール・エンド１１と前記ビッグ
・エンド１２を連結するステム部１３とからなり、全体
として、これらはほぼ同一厚さを有するように形成され
ている。前記スモール・エンド１１及び前記ビッグ・エ
ンド１２の中央部には、穴１１ａ、１２ａが穿設され、
該穴１１ａ、１２ａはピン通しによってそれぞれの内径
寸法精度を出すように処理され、それぞれの穴１１ａ、
１２ａにはそれぞれの内径寸法に合ったシェル形ニード
ル軸受がそれぞれ圧入されて固定される。そして、前記
ステム部１３の両側面の中央部には、やや薄肉の薄肉部
１３ａがその縦方向に延びて略エ型断面となるように形
成されており、機械的強度を保持しながらコンロッド自
身の重量の軽量化を図っている。By the way, in such a connecting rod, in order to increase the mechanical strength and reduce the weight of the connecting rod itself, the stem portion is usually formed in a substantially I-shaped section (thin portion). 3 and 4 are a side view and a vertical sectional view of such a conventional connecting rod. The conventional connecting rod 10 is made of an iron-based sintered alloy or an aluminum-based sintered alloy as its material, and has a small end 11 connected to a piston pin and a big end connected to a crank pin of a crankshaft.
The end 12 and the stem portion 13 connecting the small end 11 and the big end 12 are formed, and as a whole, they are formed to have substantially the same thickness. Holes 11a and 12a are formed in the central portions of the small end 11 and the big end 12,
The holes 11a and 12a are processed by pin insertion so as to obtain respective inner diameter dimensional accuracy,
Shell-type needle bearings matching the respective inner diameters are press-fitted and fixed to 12a. A slightly thin thin portion 13a is formed in the central portion of both side surfaces of the stem portion 13 so as to extend in the longitudinal direction to have a substantially E-shaped cross section, and the connecting rod itself while maintaining mechanical strength. We are trying to reduce the weight.
【０００５】[0005]
【発明が解決しようとする課題】前記の如き従来のコン
ロッドにおいては、焼結されたコンロッド素材のサイジ
ング処理時に前記薄肉部１３ａに歪が発生したり、両端
エンド部の真円度、円筒度、平行度等に関する精度上の
問題点を生じることが多かった。本発明は、このような
問題に鑑みてなされたものであって、その目的は、仕上
げ加工を容易かつ精度良好に行うことができ、しかも、
機械的強度を保持することができるとともに、全体とし
て軽量かつ安価に製造することができるコンロッドを提
供することである。In the conventional connecting rod as described above, distortion occurs in the thin portion 13a during the sizing process of the sintered connecting rod material, and the roundness and cylindricity of both end portions are There were often problems with accuracy related to parallelism and the like. The present invention has been made in view of such a problem, and an object thereof is to perform finishing easily and accurately, and further,
An object of the present invention is to provide a connecting rod which can maintain mechanical strength and can be manufactured as a whole with a light weight and at low cost.
【０００６】[0006]
【課題を解決するための手段】前記の目的を達成すべ
く、本発明に係わるコンロッドは、スモール・エンド
と、ビッグ・エンドと、前記スモール・エンドと前記ビ
ッグ・エンドを連結するステム部とからなり、焼結合金
で製造されたコンロッドにおいて、前記ステム部のほぼ
全長にわたる長穴を穿設したことを特徴としている。In order to achieve the above-mentioned object, a connecting rod according to the present invention comprises a small end, a big end, and a stem portion connecting the small end and the big end. In a connecting rod made of a sintered alloy, a long hole is formed over substantially the entire length of the stem portion.
【０００７】[0007]
【作 用】前述の如く構成された本発明に係わるコンロ
ッドにおいては、ステム部に穿設された長穴をサイジン
グ処理時における肉の逃がし部として利用することがで
き、バリの発生や歪応力による変形を可及的に抑制する
ことができる。また、コンロッド全体として、焼結材の
使用量を減らして軽量化及びコストの低減を図ることが
可能となる。[Operation] In the connecting rod according to the present invention configured as described above, the elongated hole formed in the stem portion can be used as a relief portion for meat during the sizing treatment, which may cause burrs or strain stress. The deformation can be suppressed as much as possible. In addition, it becomes possible to reduce the weight and cost of the connecting rod by reducing the amount of the sintered material used.
【０００８】[0008]
【実施例】以下、図面により本発明の一実施例を説明す
る。図１及び図２は、本発明に係わるコンロッドの一実
施例の側面図、縦断面図を示し、図１及び図２において
前述した図３及び図４に示される前記従来のコンロッド
１０の各部に対応する部分には同一の符号を付してそれ
らの重複説明を省略し、以下においては、従来のコンロ
ッド１０との相違点を重点的に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 are a side view and a vertical cross-sectional view of an embodiment of a connecting rod according to the present invention, showing various parts of the conventional connecting rod 10 shown in FIGS. 3 and 4 described above with reference to FIGS. Corresponding parts are designated by the same reference numerals, duplicate description thereof will be omitted, and in the following, differences from the conventional connecting rod 10 will be mainly described.
【０００９】図１、２に示されるコンロッド１は、スモ
ール・エンド１１とビッグ・エンド１２とを連結するス
テム部１３’の両側面の中央部に、該ステム部１３’の
ほぼ全長にわたって長手方向に延びる長穴１５が穿設さ
れている。そのため、前記ステム部１３’に穿設された
前記長穴１５をサイジング処理時における肉の逃がし部
として利用することができ、バリの発生や歪応力による
変形を可及的に抑制することができる。また、本発明に
よるコンロッド１は、機械的強度を保持しながら軽量化
のみならずコストの低減をも図ることが可能となる。The connecting rod 1 shown in FIGS. 1 and 2 has a stem portion 13 'connecting the small end 11 and the big end 12 with a central portion on both side surfaces thereof, and the stem portion 13' has a longitudinal direction substantially over its entire length. An elongated hole 15 extending in the direction is formed. Therefore, the elongated hole 15 formed in the stem portion 13 ′ can be used as a meat relief portion during the sizing process, and occurrence of burrs and deformation due to strain stress can be suppressed as much as possible. . Further, the connecting rod 1 according to the present invention can reduce not only the weight but also the cost while maintaining the mechanical strength.
【００１０】[0010]
【発明の効果】以上の説明から理解されるように、本発
明によれば、仕上げ加工を容易かつ精度良好に行うこと
ができ、しかも、機械的強度を保持することができると
ともに、全体として軽量かつ安価に製造することができ
る。As can be understood from the above description, according to the present invention, the finishing process can be performed easily and with good accuracy, the mechanical strength can be maintained, and the overall weight is light. And it can be manufactured at low cost.
【図１】本発明に係わるコンロッドの一実施例の側面
図。FIG. 1 is a side view of an embodiment of a connecting rod according to the present invention.
【図２】図１に示したコンロッドの縦断面図。FIG. 2 is a vertical sectional view of the connecting rod shown in FIG.
【図３】従来のコンロッドの側面図。FIG. 3 is a side view of a conventional connecting rod.
【図４】図３に示したコンロッドの縦断面図。FIG. 4 is a vertical sectional view of the connecting rod shown in FIG.
１…コンロッド １１…スモール・エンド １２…ビッグ・エンド １３’…ステム部 １５…長穴 1 ... Connecting rod 11 ... Small end 12 ... Big end 13 '... Stem part 15 ... Oblong hole
Claims (1)
ド１２と、前記スモール・エンド１１と前記ビッグ・エ
ンド１２を連結するステム部１３’とからなり、焼結合
金で製造されたコンロッドにおいて、 前記ステム部１
３’のほぼ全長にわたる長穴１５を穿設したことを特徴
とするコンロッド。1. A connecting rod comprising a small end 11, a big end 12, and a stem portion 13 'connecting the small end 11 and the big end 12, the connecting rod being made of a sintered alloy, wherein: Stem part 1
A connecting rod characterized by having a long hole 15 formed over substantially the entire length of 3 '.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6071932A JP3041187B2 (en) | 1994-04-11 | 1994-04-11 | Connecting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6071932A JP3041187B2 (en) | 1994-04-11 | 1994-04-11 | Connecting rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07279942A true JPH07279942A (en) | 1995-10-27 |
| JP3041187B2 JP3041187B2 (en) | 2000-05-15 |
Family
ID=13474793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6071932A Expired - Fee Related JP3041187B2 (en) | 1994-04-11 | 1994-04-11 | Connecting rod |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3041187B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT409657B (en) * | 2000-09-26 | 2002-10-25 | Miba Sintermetall Ag | SINDERED CONNECTING ROD FOR AN INTERNAL COMBUSTION ENGINE |
| JP2003035308A (en) * | 2001-07-23 | 2003-02-07 | Honda Motor Co Ltd | Structure of connecting rod of v type engine |
| EP2647854A1 (en) * | 2012-04-05 | 2013-10-09 | ThyssenKrupp Metalúrgica Campo Limpo Ltda. | Weight optimized connecting rod |
-
1994
- 1994-04-11 JP JP6071932A patent/JP3041187B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT409657B (en) * | 2000-09-26 | 2002-10-25 | Miba Sintermetall Ag | SINDERED CONNECTING ROD FOR AN INTERNAL COMBUSTION ENGINE |
| US7096756B2 (en) | 2000-09-26 | 2006-08-29 | Miba Sintermetall Aktiengesellschaft | Sintered connecting rod for an internal combustion engine |
| JP2003035308A (en) * | 2001-07-23 | 2003-02-07 | Honda Motor Co Ltd | Structure of connecting rod of v type engine |
| EP2647854A1 (en) * | 2012-04-05 | 2013-10-09 | ThyssenKrupp Metalúrgica Campo Limpo Ltda. | Weight optimized connecting rod |
| WO2013150371A1 (en) * | 2012-04-05 | 2013-10-10 | Thyssenkrupp Metalurgica Campo Limpo Ltda. | Weight optimized connecting rod |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3041187B2 (en) | 2000-05-15 |
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