JPH058382Y2 - - Google Patents
Info
- Publication number
- JPH058382Y2 JPH058382Y2 JP1984129383U JP12938384U JPH058382Y2 JP H058382 Y2 JPH058382 Y2 JP H058382Y2 JP 1984129383 U JP1984129383 U JP 1984129383U JP 12938384 U JP12938384 U JP 12938384U JP H058382 Y2 JPH058382 Y2 JP H058382Y2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- connecting rod
- cylindrical
- combustion
- support structure
- 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 - Lifetime
Links
- 239000002184 metal Substances 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 description 16
- 239000002360 explosive Substances 0.000 description 5
- 238000004880 explosion Methods 0.000 description 4
- 230000002238 attenuated effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229920001875 Ebonite Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は、ピストンの支持構造に係わり、更
に詳しくはピストンに加えられた燃焼爆発力の高
周波成分を減衰させてコネクテイング・ロツドに
伝達しないように構成したピストンの支持構造に
関するものである。[Detailed description of the invention] [Industrial application field] This invention relates to a support structure for a piston, and more specifically, to attenuate the high frequency component of the combustion explosive force applied to the piston so as not to transmit it to the connecting rod. The present invention relates to a piston support structure configured as described above.
一般に、デイーゼルエンジン等の内燃機関のピ
ストン支持構造としては、例えばコネクテイン
グ・ロツドの小端部に形成された嵌合穴に、ピス
トンピンを介してピストンを連結支持する構造と
なつている。
Generally, a piston support structure for an internal combustion engine such as a diesel engine is such that a piston is connected and supported via a piston pin to a fitting hole formed at the small end of a connecting rod, for example.
ところで、上記のようなデイーゼルエンジンに
あつては、エンジンの燃焼による燃焼（爆発）圧
力の振動成分は、殆ど減衰されずにピストン→ピ
ストンピン→コネクテイング・ロツドに伝達さ
れ、そして更にコネクテイング・ロツドからクラ
ンクシヤフトを経由してシリンダブロツク、シリ
ンダヘツド及び補機類等に伝達して振動を発生
し、デイーゼルエンジン特有のノイズを発生する
と言う問題があつた。 By the way, in the above-mentioned diesel engine, the vibration component of combustion (explosion) pressure due to combustion in the engine is transmitted almost undamped to the piston → piston pin → connecting rod, and then further to the connecting rod. There was a problem in that vibrations were transmitted from the rod via the crankshaft to the cylinder block, cylinder head, auxiliary equipment, etc., producing noise typical of diesel engines.
そこで、従来ではエンジンの燃焼圧力による振
動成分が、上記のようにピストン→ピストンピン
→コネクテイング・ロツドに伝達して発生する高
周波成分を減衰させるために、例えは実開昭58−
12656号公報に開示されているように、ピストン
ピンが嵌合するコネクテイング・ロツドの小端部
に形成された嵌合穴に、四弗化エチレン（テフロ
ン）などの有機材や耐油、耐熱性の硬質ゴムでで
きた弾性部材を設け、その弾性部材の弾性力によ
つて上記高周波振動を減衰させるものが提案され
ている。 Therefore, in the past, in order to attenuate the high frequency component generated when the vibration component due to the combustion pressure of the engine is transmitted from the piston to the piston pin to the connecting rod as described above, the
As disclosed in Publication No. 12656, the fitting hole formed at the small end of the connecting rod into which the piston pin fits is filled with an organic material such as tetrafluoroethylene (Teflon), oil-resistant, and heat-resistant. It has been proposed that an elastic member made of hard rubber is provided and the high frequency vibrations are attenuated by the elastic force of the elastic member.
然し乍ら、このような従来のものにあつてはエ
ンジンの燃焼圧力によりピストンの変位が多い時
には、弾性部材に弾性力によつて、ピストンとシ
リンダヘツドまたは給排弁が干渉するのでデイー
ゼルエンジンでは成立しないものであつた。 However, in such conventional systems, when the piston is displaced a lot due to the combustion pressure of the engine, the piston and cylinder head or supply/discharge valve interfere with each other due to the elastic force of the elastic member, so this cannot be achieved in a diesel engine. It was hot.
即ち、ピストンとシリンダヘツドとのクリアラ
ンスは、0.1mm変ると性能が大巾に変化すること
は周知である。 That is, it is well known that if the clearance between the piston and the cylinder head changes by 0.1 mm, the performance will change drastically.
また、従来のものでは潤滑油を使用できず、焼
付き等の問題が生じるおそれがある。 Furthermore, in the conventional type, lubricating oil cannot be used, and problems such as seizure may occur.
一方、金属円筒の外周にナイロン、ポリエステ
ル等の有機弾性材を浸透させた焼結合金の層を一
体的に形成し、これをピストンの嵌合穴に固定し
たものが実開昭57−164229号公報において提案さ
れている。しかし、エンジン運転時には、このピ
ストンは燃焼室の熱を受けて高温になり、熱膨張
によつてピストンの嵌合穴とピストンピンの嵌合
部との間隙が広がるので、この部位の弾性部材を
設けても高周波振動を減衰することができず、エ
ンジンの振動騒音を低減することはできない。 On the other hand, Utility Model Application Publication No. 57-164229 discloses a structure in which a layer of sintered alloy impregnated with an organic elastic material such as nylon or polyester is integrally formed around the outer periphery of a metal cylinder, and this is fixed in the fitting hole of the piston. It is proposed in the official gazette. However, during engine operation, this piston receives heat from the combustion chamber and reaches a high temperature, and the gap between the fitting hole of the piston and the fitting part of the piston pin widens due to thermal expansion. Even if provided, high frequency vibrations cannot be damped and engine vibration noise cannot be reduced.
また、この公知技術においては、燃焼圧力によ
る弾性部材の大きな変形によつてピストンとシリ
ンダヘツドまたは給排弁が干渉する傾向があり、
高温高圧で作動するデイーゼルエンジンには適用
することができないものである。 Furthermore, in this known technique, there is a tendency for the piston and cylinder head or supply/discharge valve to interfere with each other due to large deformation of the elastic member due to combustion pressure.
This cannot be applied to diesel engines that operate at high temperatures and pressures.
この考案は、係る従来の問題点に着目して案出
されたもので、その目的とするところはピストン
に加えられた燃焼爆発力の高周波成分を減衰させ
てコネクテイング・ロツドに伝達しないように構
成し、似てエンジンの燃焼時に於ける振動騒音を
著しく低減させたピストンの支持構造を提供する
ものである。
This idea was devised by focusing on the conventional problems, and its purpose is to attenuate the high frequency component of the combustion explosive force applied to the piston so that it is not transmitted to the connecting rod. The present invention similarly provides a piston support structure that significantly reduces vibration noise during engine combustion.
この考案は上記目的を達成するため、コネクテ
イング・ロツドの小端部に形成された嵌合穴に円
筒状積層体を嵌合し、この円筒状積層体の穴に挿
通したピストンピンをピストンに固定したピスト
ンの支持構造において、前記円筒状積層体は内層
に位置するコンロツドメタルと、同心状に相互に
摺動運動可能な複数層の薄肉円筒部材から構成さ
れていることを要旨とするものである。
In order to achieve the above object, this invention involves fitting a cylindrical laminated body into a fitting hole formed at the small end of the connecting rod, and inserting a piston pin into the hole of this cylindrical laminated body into a piston. In the fixed piston support structure, the cylindrical laminate is composed of a conrod metal located in an inner layer and a plurality of thin-walled cylindrical members that can mutually slide concentrically. It is.
以下添付図面に基いて、この考案の実施例を説
明する。
Embodiments of this invention will be described below based on the accompanying drawings.
添付図面は、この考案の実施したピストン１の
断面図を示し、２はコネクテイング・ロツド、３
はピストンピンを示し、ピストン１はコネクテイ
ング・ロツド２の小端部２ａに形成された嵌合孔
４に前記ピストンピン３を介して連結支持されて
いる。 The attached drawing shows a sectional view of a piston 1 in which this invention is implemented, 2 is a connecting rod, 3 is a connecting rod, and 3 is a connecting rod.
indicates a piston pin, and the piston 1 is connected and supported in a fitting hole 4 formed in the small end 2a of the connecting rod 2 via the piston pin 3.
前記小端部２ａに形成された嵌合孔４の内壁面
には、内層に位置するコンロツドメタル７と、同
心状に相互に摺動運動可能な複数層の薄肉円筒部
材（この実施例では６ａ，６ｂ，６ｃの３層）か
ら構成される円筒状積層体が嵌合され、この円筒
状積層体の穴のピストンピン３を挿通し、このピ
ストンピン３をピストン１に固定している。 The inner wall surface of the fitting hole 4 formed in the small end 2a is provided with a plurality of layers of thin cylindrical members (in this embodiment, a conrod metal 7 located in the inner layer and a plurality of thin cylindrical members that can mutually slide concentrically). A cylindrical laminated body composed of three layers (6a, 6b, 6c) is fitted, and the piston pin 3 is inserted into the hole of this cylindrical laminated body, and the piston pin 3 is fixed to the piston 1.
なお、８はスナツプリングであつて、ピストン
ピン３がピストン１のボス部１ａから抜けださな
いようにボス部１ａの両端部に形成された溝１ｂ
に嵌め込まれている。 Note that 8 is a snap spring, which has grooves 1b formed at both ends of the boss portion 1a to prevent the piston pin 3 from coming out of the boss portion 1a of the piston 1.
is embedded in.
次に、作用について説明する
いまピストン１の頂部に、矢印方向からエンジ
ンの燃焼爆発圧力Ｆが作用すると、この圧力は、
コネクテイング・ロツド２の小端部２ａに形成さ
れた嵌合孔４の内壁面に作用する。 Next, the action will be explained. Now, when the combustion explosion pressure F of the engine acts on the top of the piston 1 from the direction of the arrow, this pressure becomes
It acts on the inner wall surface of the fitting hole 4 formed in the small end 2a of the connecting rod 2.
この時、嵌合孔４に圧入されている多層構造の
各薄肉円筒部材６ａ，６ｂ，６ｃの表裏面には微
少のクリアランスがあるため、薄肉円筒部材６
ａ，６ｂ，６ｃは燃焼爆発圧力Ｆが作用する方向
に若干変形する。この時、各薄肉円筒部材６ａ，
６ｂ，６ｃの表裏面には、クーロン摩擦が作用
し、そして燃焼爆発力による比較的高周波の振動
を減衰させる。 At this time, since there is a slight clearance between the front and back surfaces of each thin-walled cylindrical member 6a, 6b, 6c with a multilayer structure that is press-fitted into the fitting hole 4, the thin-walled cylindrical member 6
a, 6b, and 6c are slightly deformed in the direction in which the combustion explosion pressure F acts. At this time, each thin cylindrical member 6a,
Coulomb friction acts on the front and back surfaces of 6b and 6c, and damps relatively high-frequency vibrations caused by combustion explosive force.
この結果、ピストン１に作用する燃焼爆発圧力
Ｆは、コネクテイング・ロツド２に伝達されず、
従つて、コネクテイング・ロツド２から図示しな
いクランクシヤフトを経由してシリンダブロツク
やシリンダヘツド及び補機類等に伝達して発生す
る振動も減衰され、デイーゼルエンジン特有のノ
イズを有効に防止することが出来るものである。 As a result, the combustion explosion pressure F acting on the piston 1 is not transmitted to the connecting rod 2.
Therefore, the vibrations generated by being transmitted from the connecting rod 2 to the cylinder block, cylinder head, auxiliary equipment, etc. via the crankshaft (not shown) are attenuated, and the noise peculiar to diesel engines can be effectively prevented. It is possible.
この考案は、コネクテイング・ロツドの小端部
に形成された嵌合穴に円筒状積層体を嵌合し、こ
の円筒状積層体の穴に挿通したピストンピンをピ
ストンに固定したピストンの支持構造において、
前記円筒状積層体は内層に位置するコンロツドメ
タルと、同心状に相互に摺動運動可能な複数層の
薄肉円筒部材から構成されているピストンの支持
構造であり、次の効果を奏することができる。即
ち、この円筒状積層体の相互の摺動運動によつ
て、ピストンに加えられた燃焼爆発力がこの円筒
状積層体の間の微妙な動きと摩擦によつて減衰さ
れて、その燃焼爆発力の高周波振動はコネクテイ
ング・ロツドの小端部には殆ど伝達されない。そ
の結果、エンジンの運転時の高周波振動によつて
発生する振動騒音を著しく低減させることがで
き、静粛なエンジンを提供することができる。
This idea is based on a piston support structure in which a cylindrical stack is fitted into a fitting hole formed at the small end of the connecting rod, and a piston pin inserted through the hole in the cylindrical stack is fixed to the piston. In,
The cylindrical laminate is a piston support structure composed of a conrod metal located in the inner layer and a plurality of thin-walled cylindrical members that can mutually slide concentrically, and has the following effects. can. In other words, the combustion explosive force applied to the piston due to the mutual sliding movement of the cylindrical laminated bodies is attenuated by the subtle movement and friction between the cylindrical laminated bodies, and the combustion explosive force is reduced. High frequency vibrations are hardly transmitted to the small end of the connecting rod. As a result, vibration noise generated by high-frequency vibrations during engine operation can be significantly reduced, and a quiet engine can be provided.
更に、ピストンとシリンダヘツドまたは給排気
弁が干渉することがなく、特にデイーゼルエンジ
ンのピストンの支持構造として有効に利用するこ
とができる。また、複数層の薄肉円筒部材を常に
エンジンオイルによつて冷却されていて、温度の
低いコネクテイング・ロツドの嵌合穴とピストン
ピンの嵌合部との間に設けているので、ピストン
の温度に影響されることなく高周波振動を減衰す
ることができ、エンジンの振動振動を低減するこ
とができる。 Furthermore, there is no interference between the piston and the cylinder head or the supply/exhaust valve, and it can be effectively used as a support structure for the piston of a diesel engine in particular. In addition, the multiple layers of thin-walled cylindrical members are constantly cooled by engine oil and are provided between the low-temperature connecting rod fitting hole and the piston pin fitting part, so the piston temperature It is possible to attenuate high-frequency vibrations without being affected by the vibrations of the engine, and it is possible to reduce vibrations of the engine.
図面は、この考案を実施した断面図である。
２……コネクテイング・ロツド、２ａ……小端
部、３……ピストンピン、３ａ……嵌合部、４…
…嵌合穴、６ａ，６ｂ，６ｃ……薄肉円筒部材。
The drawing is a sectional view of this invention. 2... Connecting rod, 2a... Small end, 3... Piston pin, 3a... Fitting part, 4...
...Fitting hole, 6a, 6b, 6c...thin cylindrical member.
Claims (1)
嵌合穴に円筒状積層体を嵌合し、この円筒状積層
体の穴に挿通したピストンピンをピストンに固定
したピストンの支持構造において、前記円筒状積
層体は内層に位置するコンロツドメタルと、同心
状に相互に摺動運動可能な複数層の薄肉円筒部材
から構成されているピストンの支持構造。 In a piston support structure in which a cylindrical laminate is fitted into a fitting hole formed in a small end of a connecting rod, and a piston pin inserted through the hole in the cylindrical laminate is fixed to the piston, the cylindrical The shaped laminate is a piston support structure consisting of a conrod metal located in the inner layer and multiple layers of thin-walled cylindrical members that can mutually slide concentrically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12938384U JPS6144064U (en) | 1984-08-28 | 1984-08-28 | Piston support structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12938384U JPS6144064U (en) | 1984-08-28 | 1984-08-28 | Piston support structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6144064U JPS6144064U (en) | 1986-03-24 |
| JPH058382Y2 true JPH058382Y2 (en) | 1993-03-02 |
Family
ID=30687999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12938384U Granted JPS6144064U (en) | 1984-08-28 | 1984-08-28 | Piston support structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6144064U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6020057B2 (en) * | 2012-11-07 | 2016-11-02 | マツダ株式会社 | Engine piston structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57164229U (en) * | 1981-04-13 | 1982-10-16 |
-
1984
- 1984-08-28 JP JP12938384U patent/JPS6144064U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6144064U (en) | 1986-03-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPWO2002055881A1 (en) | Fluid pump and high pressure fuel supply pump | |
| US5327813A (en) | Wrist pin having a ceramic composite core | |
| US20140013939A1 (en) | Wrist pin and method of reducing wear between members thereof, connecting rod, piston and methods of contructing same | |
| US5609422A (en) | Crankshaft bearing | |
| US4856417A (en) | Trunk piston for use in an internal combustion engine | |
| JPH08177616A (en) | Dry liner for internal combustion engine | |
| JPH058382Y2 (en) | ||
| EP1697662B1 (en) | Phosphatized and bushingless piston and connecting rod assembly having an internal gallery and profiled piston pin | |
| AU744249B2 (en) | Molded plastic camshaft with metal seal ring | |
| US6463903B1 (en) | Piston assembly for free piston internal combustion engine | |
| JPH0693927A (en) | Piston of internal combustion engine | |
| US20040217550A1 (en) | Piston ring for internal combustion engine and internal combusion engine using the same | |
| JP3216899U (en) | In-cylinder pressure adjusting device for engine | |
| JPS5916490Y2 (en) | Camshaft bearing device in internal combustion engine | |
| JP2020020395A (en) | piston ring | |
| EP1848895A2 (en) | A bearing assembly | |
| WO2002012682A1 (en) | Improvements in cam contacting devices | |
| JP2570281Y2 (en) | Engine assembled crankshaft | |
| JPH02241952A (en) | Cylinder block of engine | |
| KR970705692A (en) | Ceramic sliding parts (A CERAMIC SLIDING COMPONENT) | |
| JPS6314042Y2 (en) | ||
| JPH0426679Y2 (en) | ||
| JPH08338530A (en) | Oil ring having expander | |
| JPS63235648A (en) | Insulation piston structure for engine | |
| US5572963A (en) | Hydraulic tappet |