JPS6319414A - Connecting rod of engine - Google Patents
Connecting rod of engineInfo
- Publication number
- JPS6319414A JPS6319414A JP61161630A JP16163086A JPS6319414A JP S6319414 A JPS6319414 A JP S6319414A JP 61161630 A JP61161630 A JP 61161630A JP 16163086 A JP16163086 A JP 16163086A JP S6319414 A JPS6319414 A JP S6319414A
- Authority
- JP
- Japan
- Prior art keywords
- connecting rod
- cap
- rod body
- bolt
- titanium 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.)
- Pending
Links
- 229910001069 Ti alloy Inorganic materials 0.000 claims abstract description 15
- 238000007747 plating Methods 0.000 claims abstract description 13
- 230000013011 mating Effects 0.000 claims description 24
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910018104 Ni-P Inorganic materials 0.000 description 1
- 229910018536 Ni—P Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- -1 for example Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- F16C2204/00—Metallic materials; Alloys
- F16C2204/40—Alloys based on refractory metals
- F16C2204/42—Alloys based on titanium
-
- 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
- F16C2360/00—Engines or pumps
- F16C2360/22—Internal combustion engines
-
- 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
-
- 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
Landscapes
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、大端部を分割式としたエンジンの連接棒に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an engine connecting rod having a split-type large end.
クランク軸を一体構造としたエンジンでは、連接棒の大
端部を連接棒本体とキャップとに分割し、これら連接棒
本体とキャップの合せ面にクランクピンを挾み込む凹部
を形成するとともに、上記連接棒本体とキャップとを、
その合せ面を貫通するボルトで締付は固定している。In an engine with an integrated crankshaft, the large end of the connecting rod is divided into a connecting rod body and a cap, and a recess into which the crank pin is inserted is formed on the mating surface of the connecting rod body and the cap. The connecting rod body and the cap,
It is tightened and fixed with a bolt that passes through the mating surface.
ところで、この種の連接棒はピストンからの大きな力を
受けて高速運動するため、重全が大であると、慣性力が
大きくなり、高回転化に不向きとなる。By the way, this type of connecting rod receives a large force from the piston and moves at high speed, so if the weight is large, the inertial force becomes large, making it unsuitable for high speed rotation.
そこで、従来、この連接棒の軽量化を目的として、連接
棒本体とキャップの両者を、これまでの炭素鋼や合金鋼
に代って、チタン合金あるいは繊維強化金属（Ｆ ＲＭ
）で形成することが考えられている。Therefore, in order to reduce the weight of this connecting rod, both the connecting rod body and the cap were made of titanium alloy or fiber reinforced metal (FRM) instead of the conventional carbon steel or alloy steel.
) is considered to be formed.
ところが、チタン合金や繊維強化金属は上記鋼材に比べ
てヤング率が低いので、圧縮力や曲げを受けると、連接
棒本体とキャップとの合せ部が、凹部の径方向に伸縮を
繰り返し、これら連接棒本体とキャップとの合せ面が互
いに叩き合ったり、擦り合うことがあった。二のため、
合せ面が部分的に欠落したり、細かな亀裂が生じるフレ
ッティング摩耗を起こし、この摩耗によりボルトの挿通
部分にがたつきが生じて、ボルト自体に変形や折損の原
因となる大きな曲げ力が加わる不具合があった。However, titanium alloys and fiber-reinforced metals have a lower Young's modulus than the above-mentioned steel materials, so when subjected to compressive force or bending, the joint between the connecting rod body and the cap repeatedly expands and contracts in the radial direction of the recess, causing these joints to The mating surfaces of the rod body and the cap sometimes hit or rubbed against each other. For two,
This causes fretting wear, which causes parts of the mating surfaces to be missing or small cracks to form, and this wear causes looseness in the part where the bolt is inserted, creating a large bending force that can cause deformation or breakage of the bolt itself. There was an additional problem.
そこで、本発明においては、連接棒本体とキャップを、
チタン合金又は繊維強化金属（Ｆ ＲＭ ）で形成する
に当り、
これら連接棒本体とキャップとの合せ面に、チタン合金
又は繊維強化金属（Ｆ ＲＭ ）よりも高硬度のメッキ
層を被着したことを特徴とする。Therefore, in the present invention, the connecting rod body and the cap are
When made of titanium alloy or fiber reinforced metal (FRM), a plating layer with higher hardness than the titanium alloy or fiber reinforced metal (FRM) is applied to the mating surface of the connecting rod body and cap. It is characterized by
この構成によれば、連接棒本体とキャップとの合せ部が
、凹部の径方向に伸縮を繰り返したとしても、これら両
者の合せ面はメッキ層で覆われているから、チタン合金
又はＦ ＲＭ相互の直接接触が回避され、この合せ面の
摩耗を未然に防止することができる。このため、ボルト
の挿通部分にがたつきが生じることもなく、ボルトに曲
げ力が加わらずに済む。According to this configuration, even if the mating portion of the connecting rod body and the cap repeatedly expands and contracts in the radial direction of the recess, the mating surfaces of both are covered with a plating layer, so titanium alloy or F RM Direct contact between the mating surfaces is avoided, and wear of the mating surfaces can be prevented. Therefore, there is no rattling in the part through which the bolt is inserted, and no bending force is applied to the bolt.
以下本発明を、図面に示す一実施例にもとづいて説明す
る。The present invention will be explained below based on an embodiment shown in the drawings.
第４図中符号１はピストンであり、このピストン１は連
接棒２を介してクランク軸３のクランクピン４と連結さ
れている。本実施例の連接棒２はチタン合金にて構成さ
れており、この連接棒２の詳細については、第１図ない
し第３図に示されている。Reference numeral 1 in FIG. 4 is a piston, and this piston 1 is connected to a crank pin 4 of a crankshaft 3 via a connecting rod 2. The connecting rod 2 of this embodiment is made of a titanium alloy, and details of this connecting rod 2 are shown in FIGS. 1 to 3.
すなわち、連接棒２のクランクピン４に連なる大端部５
は、連接棒本体６とキャップ７とに分割されており、こ
れら連接棒本体６とキャップ７との合せ面８，９には、
夫々半円形の凹部ｔｏ、 ｔｔか形成されている。これ
ら凹部１０．１１は連接棒本体６とキャップ７とを衝合
させた際に、互いに対向して上記クランクピン４を挾み
込んでおり、これら凹部１０．１１とクランクピン４と
の間には、二分割形の平軸受１２．１２が介装されてい
る。That is, the large end 5 of the connecting rod 2 that connects to the crank pin 4
is divided into a connecting rod body 6 and a cap 7, and the mating surfaces 8 and 9 of the connecting rod body 6 and cap 7 are
Semicircular recesses to and tt are formed, respectively. When the connecting rod main body 6 and the cap 7 are brought into contact with each other, these recesses 10.11 face each other and insert the crank pin 4, and between these recesses 10.11 and the crank pin 4, A two-piece plain bearing 12.12 is interposed therein.
そして、連接棒本体６とキャップ７には、夫々凹部１０
．１１の両側の合せ面８，９に開口するボルト孔１３．
１４が形成されている。これらボルト孔１３゜１４間に
はボルト１５が挿通されており、このボルト１５の挿通
端をナツト１６で締め上げることで、連接棒本体６とキ
ャップ７とが締付は固定されている。The connecting rod main body 6 and the cap 7 each have a recess 10.
．． 11. Bolt holes 13.
14 is formed. A bolt 15 is inserted between these bolt holes 13 and 14, and by tightening the inserted end of this bolt 15 with a nut 16, the connecting rod main body 6 and the cap 7 are tightened and fixed.
また、上記ボルト１５が貫通する合せ面８，９には、チ
タン合金よりも高硬度の無電解Ｎ ｉ −Ｐメッキある
いはＮ ｉ −Ｐ −Ｂメッキが施されており、このメ
ッキ層１７が合せ面８．９間に介在されている。Furthermore, the mating surfaces 8 and 9 through which the bolts 15 pass are coated with electroless Ni-P plating or Ni-P-B plating, which has a harder hardness than titanium alloy. It is interposed between surfaces 8 and 9.
このような構成によれば、連接棒本体６とキャップ７と
の合せ面８，９に、チタン合金よりも高硬度のメッキ層
１７を被着したので、連接棒本体６とキャップ７との合
せ部が圧縮力を受けて、夫々凹部１０．１１の径方向に
伸縮を繰り返したとしても、チタン合金製の合せ面８，
９の直接接触が回避され、この合せ面８，９の摩耗を未
然に防止することができる。According to such a configuration, the mating surfaces 8 and 9 of the connecting rod body 6 and the cap 7 are coated with the plating layer 17, which has a higher hardness than titanium alloy, so that the mating surfaces 8 and 9 of the connecting rod body 6 and the cap 7 are coated. Even if the titanium alloy mating surfaces 8 and 11 repeatedly expand and contract in the radial direction of the recesses 10 and 11 under compressive force
Direct contact between the mating surfaces 8 and 9 is avoided, and wear of the mating surfaces 8 and 9 can be prevented.
このため、ボルト１５の挿通部分にがたつきが生じるこ
ともなく、ボルト１５に大きな曲げ力が加わらずに済む
から、このボルト１５の変形や折損を防止できる。Therefore, the portion through which the bolt 15 is inserted does not shake, and no large bending force is applied to the bolt 15, so that deformation and breakage of the bolt 15 can be prevented.
なお、上述した実施例では、連接棒をチタン合金にて構
成したが、このチタン合金の代わりに、例えばＳｉＣ（
炭化ケイ素）を強化材に利用したアルミ合金Ｆ ＲＭを
用いても良い。このＦＲＭもチタン合金と同様に軽量で
はあるが、ヤング率か低いので、連接棒本体とキャップ
との合せ面にメッキ層を被着すれば、上記実施例と同様
の効果が得られる。In the above-mentioned embodiment, the connecting rod was made of titanium alloy, but instead of this titanium alloy, for example, SiC (
An aluminum alloy FRM using silicon carbide as a reinforcing material may also be used. Although this FRM is also lightweight like titanium alloy, it has a low Young's modulus, so if a plating layer is applied to the mating surface of the connecting rod body and the cap, the same effect as in the above embodiment can be obtained.
また、上記実施例では、連接棒本体とキャップの両方の
合せ面にメッキ層を被着したが、本発明はこれに限らず
、いずれか一方の合せ面にのみメッキ層を被着しても良
い。Further, in the above embodiment, the plating layer is applied to both the mating surfaces of the connecting rod body and the cap, but the present invention is not limited to this, and the plating layer may be applied to only one of the mating surfaces. good.
さらに、連接棒本体とキャップとの連結手段も上記実施
例に制約されず、例えば連接棒本体側に形成したねじ孔
に、キャップ側からボルトをねじ込んだり、植え込みボ
ルトを用いても良い。Further, the means for connecting the connecting rod body and the cap is not limited to the above embodiments, and for example, a bolt may be screwed into a screw hole formed on the connecting rod body side from the cap side, or a stud bolt may be used.
以上詳述した本発明によれば、メッキ層の存在によって
、連接棒本体とキャップとの合せ面の摩耗を防止でき、
このため、ボルトの挿通部分にがたつきが生じることも
なく、ボルトに大きな曲げ力が加わらずに済むから、こ
のボルトの変形や折損を防止することができ、信頼性が
向上する。According to the present invention described in detail above, the presence of the plating layer can prevent wear on the mating surfaces of the connecting rod body and the cap,
Therefore, there is no rattling in the part through which the bolt is inserted, and there is no need to apply a large bending force to the bolt, which prevents the bolt from deforming or breaking, improving reliability.
図面は本発明の一実施例を示し、第１図は連接棒の断面
図、第２図は連接棒本体の合せ面を示す平面図、第３図
はキャップの合せ面を示す平面図、第４図は連接棒回り
の斜視図である。
４・・・クランクピン、５・・・大端部、６・・・連接
棒本体、７・・・キャップ、８，９・・・合せ面、１０
．１１・・・凹部、１５・・・ボルト、１７・・・メッ
キ層。The drawings show one embodiment of the present invention, and FIG. 1 is a sectional view of the connecting rod, FIG. 2 is a plan view showing the mating surface of the connecting rod body, FIG. 3 is a plan view showing the mating surface of the cap, and FIG. Figure 4 is a perspective view of the area around the connecting rod. 4... Crank pin, 5... Big end, 6... Connecting rod body, 7... Cap, 8, 9... Matching surface, 10
．． 11... recess, 15... bolt, 17... plating layer.
Claims (1)
とに分割し、これら連接棒本体とキャップとの合せ面に
上記クランクピンを挾み込む凹部を形成するとともに、
上記連接棒本体とキャップとを、その合せ面を貫通する
ボルトで締付け固定してなるエンジンの連接棒において
、 上記連接棒本体とキャップを、チタン合金又は繊維強化
金属（ＦＲＭ）で形成するに当り、これら連接棒本体と
キャップとの合せ面に、チタン合金又は繊維強化金属（
ＦＲＭ）よりも高硬度のメッキ層を被着したことを特徴
とするエンジンの連接棒。[Claims] The large end connected to the crank pin is divided into a connecting rod body and a cap, and a recess into which the crank pin is inserted is formed on the mating surface of the connecting rod body and the cap, and
In an engine connecting rod in which the connecting rod body and the cap are tightened and fixed with bolts passing through their mating surfaces, the connecting rod body and the cap are made of titanium alloy or fiber reinforced metal (FRM). , titanium alloy or fiber-reinforced metal (
An engine connecting rod characterized by being coated with a plating layer that is harder than FRM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61161630A JPS6319414A (en) | 1986-07-09 | 1986-07-09 | Connecting rod of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61161630A JPS6319414A (en) | 1986-07-09 | 1986-07-09 | Connecting rod of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6319414A true JPS6319414A (en) | 1988-01-27 |
Family
ID=15738835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61161630A Pending JPS6319414A (en) | 1986-07-09 | 1986-07-09 | Connecting rod of engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6319414A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016084906A (en) * | 2014-10-28 | 2016-05-19 | ヤマハ発動機株式会社 | Connecting rod, internal combustion engine, and motor vehicle |
-
1986
- 1986-07-09 JP JP61161630A patent/JPS6319414A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016084906A (en) * | 2014-10-28 | 2016-05-19 | ヤマハ発動機株式会社 | Connecting rod, internal combustion engine, and motor vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20110013862A1 (en) | Bearing structure for crankshaft | |
| JPH08510813A (en) | Piston assembly with load-distributed central fixed wrist pin | |
| US5560333A (en) | Internal combustion engine connecting rod | |
| US10495141B2 (en) | Bearing with lightweight backing substrate | |
| JPS6319414A (en) | Connecting rod of engine | |
| KR100702092B1 (en) | Connecting rod for internal combustion engines | |
| JPS6319413A (en) | Connecting rod of engine | |
| JPS63212708A (en) | Camshaft made of cast iron for internal combustion engine | |
| US6203203B1 (en) | Slide bearing having a bearing block and a bearing cap | |
| JPH0446087Y2 (en) | ||
| JPS6113016A (en) | Connecting rod | |
| JPH0819951B2 (en) | Sliding member of internal combustion engine | |
| JPH05196030A (en) | Connecting rod | |
| JP3460296B2 (en) | Connecting rod | |
| US2735314A (en) | Sectional crankshaft | |
| JP3106862B2 (en) | Bolt fastening method | |
| JPH05240236A (en) | Connecting rod for reciprocating engine | |
| EP2652274B1 (en) | Rocker shaft shim | |
| JP2002188618A (en) | Connecting rod for internal combustion engine | |
| JPS585128Y2 (en) | Connecting rods for internal combustion engines | |
| JPH0642526A (en) | Connecting rod made of aluminum alloy of internal-combustion engine | |
| KR20070001068A (en) | Fastener pre-stressing joint | |
| JPH0586017U (en) | Structure of connecting rod | |
| JPH0730977Y2 (en) | Engine crankshaft bearing structure | |
| JPH10299759A (en) | Connecting rod for internal combustion engine |