JPH0443619Y2 - - Google Patents
Info
- Publication number
- JPH0443619Y2 JPH0443619Y2 JP1986191805U JP19180586U JPH0443619Y2 JP H0443619 Y2 JPH0443619 Y2 JP H0443619Y2 JP 1986191805 U JP1986191805 U JP 1986191805U JP 19180586 U JP19180586 U JP 19180586U JP H0443619 Y2 JPH0443619 Y2 JP H0443619Y2
- Authority
- JP
- Japan
- Prior art keywords
- metal bearing
- bearing block
- stem
- metal
- end surface
- 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
Links
- 229910052751 metal Inorganic materials 0.000 claims description 79
- 239000002184 metal Substances 0.000 claims description 79
- 239000003733 fiber-reinforced composite Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 239000012783 reinforcing fiber Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012768 molten material Substances 0.000 description 2
- 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
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000002759 woven fabric 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
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/04—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads with elastic intermediate part of fluid cushion
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案は内燃機関のコネクテイングロツドに関
するものである。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a connecting rod for an internal combustion engine.
［従来の技術］
特開昭57−97911号公報に開示されるように、
アルミナ、ステンレス鋼、カーボン、炭化硅素な
どの強化繊維を積層し、強化繊維の間に金属、合
成樹脂などの溶融材料を含浸成形してなるFRM
またはFRP（繊維強化複合材）を素材とするコネ
クテイングロツドでは、クランプアームと連結さ
れる大端部に、ピストンから引張・圧縮荷重だけ
でなく曲げ荷重を受けるので、強化繊維が引き裂
かれるなどして亀裂を生じる恐れがある。[Prior Art] As disclosed in Japanese Unexamined Patent Publication No. 57-97911,
FRM made by laminating reinforcing fibers such as alumina, stainless steel, carbon, and silicon carbide, and impregnating and molding molten materials such as metals and synthetic resins between the reinforcing fibers.
Alternatively, with connecting rods made of FRP (fiber reinforced composite), the large end connected to the clamp arm receives not only tensile and compressive loads but also bending loads from the piston, which can cause the reinforcing fibers to tear. may cause cracks.
上述の亀裂を防止するために、本出願人による
実願昭60−149695号に係るコネクテイングロツド
では、FRP製ステムの端部を、半円形のクラン
プピン穴を有する金属軸受ブロツクに突き合せ、
ステムに外嵌した金属枠をボルトにより金属軸受
ブロツクに結合している。ステムと金属軸受ブロ
ツクとの突合せ部は、耐熱性樹脂により接着して
ガタの発生を防止しているが、長期運転に伴つて
ステムが熱負荷と高荷重により微少なクリープ
（へたり）を生じ、ステムと金属枠との間にガタ
が生じると、金属枠と肩部に局部的な高荷重が作
用し、亀裂を生じる恐れがある。 In order to prevent the above-mentioned cracks, in the connecting rod according to Utility Model Application No. 149695/1985, the end of the FRP stem is butted against a metal bearing block having a semicircular clamp pin hole. ,
A metal frame fitted around the stem is connected to a metal bearing block with bolts. The butt part between the stem and the metal bearing block is bonded with heat-resistant resin to prevent rattling, but with long-term operation, the stem may develop slight creep due to heat load and high load. If play occurs between the stem and the metal frame, a high local load will be applied to the metal frame and the shoulder, potentially causing cracks.
［考案が解決しようとする問題点］
本考案の目的は上述の問題に鑑み、金属枠とス
テムとの間にガタが生じないようにした、内燃機
関のコネクテイングロツドを提供することにあ
る。[Problems to be solved by the invention] In view of the above-mentioned problems, the purpose of the invention is to provide a connecting rod for an internal combustion engine that prevents play from occurring between the metal frame and the stem. .
［問題を解決するための手段］
上記目的を達成するために、本考案の構成は互
いに重ね合される金属軸受ブロツクの下端面と金
属軸受キヤツプの上端面とにクランプピンを挟む
半円形のくぼみを設け、繊維強化複合材からなる
ステムの端部に末拡がりになつている断面長方形
のテーパ部を設け、金属枠に設けた断面長方形の
テーパ穴にステムのテーパ部を嵌合し、テーパ部
の下端面を皿ばねを挟んで金属軸受ブロツクの上
端面に突き合せ、金属枠の下端面を金属軸受ブロ
ツクの上端面に重ね合せ、金属枠と金属軸受ブロ
ツクと金属軸受キヤツプを左右１対のボルトとナ
ツトにより締結したものである。[Means for solving the problem] In order to achieve the above object, the structure of the present invention is such that a semicircular recess is formed between the lower end surface of the metal bearing block and the upper end surface of the metal bearing cap, which are overlapped with each other, to sandwich the clamp pin. A tapered part with a rectangular cross section that widens toward the end is provided at the end of the stem made of fiber-reinforced composite material, and the tapered part of the stem is fitted into a tapered hole with a rectangular cross section provided in the metal frame. The lower end surface is butted against the upper end surface of the metal bearing block with the disc spring in between, the lower end surface of the metal frame is overlapped with the upper end surface of the metal bearing block, and the metal frame, metal bearing block, and metal bearing cap are assembled into a pair of left and right It is fastened with bolts and nuts.
［作用］
ステムは皿ばねを介して金属軸受ブロツクに弾
性的に結合されるから、ステムのへたりによるス
テムと金属軸受ブロツクとの間の弛みやガタが皿
ばねにより吸収され、金属枠によるステムと金属
軸受ブロツクとの安定した結合が維持される。[Function] Since the stem is elastically connected to the metal bearing block via the disc spring, the slack or looseness between the stem and the metal bearing block due to the stem settling is absorbed by the disc spring, and the stem is connected to the metal frame by the disc spring. A stable connection between the metal bearing block and the metal bearing block is maintained.
［考案の実施例］
第１図に示すように、コネクテイングロツド３
のステム４はガラス、カーボン、炭化硅素などの
繊維または織布に、金属、エポキシ樹脂、イミド
樹脂などの溶融材料を含浸してなる繊維強化複合
材から一体に成形され、ステム４の小端部はピン
穴を設けられ、ピン穴にピストンピンを支持する
ブツシユを嵌装される。ステム４の大端部側はス
テム４を末拡がりした好ましくは断面長方形のテ
ーパ部を形成される。テーパ部の下端面４ａは皿
ばね１６を挟んで、アルミニウムなどの金属軸受
ブロツク６へ突き合される。[Embodiment of the invention] As shown in FIG.
The stem 4 is integrally formed from a fiber-reinforced composite material made by impregnating glass, carbon, silicon carbide, or other fibers or woven fabric with a molten material such as metal, epoxy resin, or imide resin. is provided with a pin hole, and a bushing supporting the piston pin is fitted into the pin hole. The large end side of the stem 4 is formed with a tapered part that widens toward the end of the stem 4 and preferably has a rectangular cross section. The lower end surface 4a of the tapered portion is butted against a metal bearing block 6 made of aluminum or the like with the disc spring 16 in between.
金属軸受ブロツク６は上端部に左右の低い肩部
を形成され、下端面にクランプピンを嵌合する半
円形のピン穴ないしくぼみ１３を形成される。ス
テム４のテーパ部は好ましくは断面長方形のテー
パ穴１０を有する金属枠５を外嵌され、かつ接着
剤により結合される。金属枠５の左右の肩部１２
はボルト挿通穴１４を設けられる（第２図）。 The metal bearing block 6 has left and right low shoulders formed at its upper end, and a semicircular pin hole or depression 13 into which a clamp pin is fitted at its lower end. The tapered portion of the stem 4 is fitted over a metal frame 5 having a tapered hole 10 preferably having a rectangular cross section, and is bonded with an adhesive. Left and right shoulders 12 of the metal frame 5
is provided with a bolt insertion hole 14 (FIG. 2).
こうして、FRP製のステム４に結合した金属
枠５の下端面を、金属軸受ブロツク６の上端面
（詳しくは肩部）に重ね合せ、金属軸受ブロツク
６の下端面を、クランプピンを嵌合する半円形の
ピン穴ないしくぼみ１３ａを有するアルミニウム
などの金属軸受キヤツプ７の上端面に重ね合せ、
これらを１対のボルト８とナツト９により締結す
る。 In this way, the lower end surface of the metal frame 5 connected to the FRP stem 4 is overlapped with the upper end surface (more specifically, the shoulder) of the metal bearing block 6, and the lower end surface of the metal bearing block 6 is fitted with a clamp pin. Overlaid on the upper end surface of a metal bearing cap 7 made of aluminum or the like having a semicircular pin hole or recess 13a,
These are fastened with a pair of bolts 8 and nuts 9.
なお、ステム４は平坦な厚い板状のものであ
り、したがつて、金属枠５も第２図に示すように
厚板状のものであり、断面長方形のテーパ穴１０
を設けられる。 The stem 4 is a flat, thick plate, and therefore the metal frame 5 is also a thick plate, as shown in FIG.
can be established.
本考案によれば、ステム４のテーパ部の下端面
４ａと金属軸受ブロツク６の上端面６ａとの間
に、金属製の座板１５と皿ばね１６とが介装され
る。座板１５はステム４を保護する。皿ばね１６
の一端は座板１５に衝合され、他端は金属軸受ブ
ロツク６の上端面６ａに設けた円形のくぼみ６ｂ
に衝合される。くぼみ６ｂは皿ばね１６の横移動
を抑える。 According to the present invention, a metal seat plate 15 and a disc spring 16 are interposed between the lower end surface 4a of the tapered portion of the stem 4 and the upper end surface 6a of the metal bearing block 6. The seat plate 15 protects the stem 4. Belleville spring 16
One end is abutted against the seat plate 15, and the other end is a circular recess 6b provided in the upper end surface 6a of the metal bearing block 6.
is collided with. The recess 6b suppresses lateral movement of the disc spring 16.
本考案は上述のように、コネクテイングロツド
３のステム４を繊維強化複合剤により一体に成形
し、ステム４のテーパ部に外嵌した金属枠５を、
皿ばね１６を挟んで金属ブロツク６に突き合せ、
金属枠５と金属軸受ブロツク６と金属軸受キヤツ
プ７を互いに重ね合せ、かつ１対のボルト８とナ
ツト９により締結したから、ボルト８の締付けに
よりステム４の下端面４ａが皿ばね１６を介して
金属軸受ブロツク６へ強く押し付けられる。 As described above, in the present invention, the stem 4 of the connecting rod 3 is integrally molded using a fiber-reinforced composite material, and the metal frame 5 is fitted onto the tapered portion of the stem 4.
butt against the metal block 6 with the disc spring 16 in between,
Since the metal frame 5, the metal bearing block 6, and the metal bearing cap 7 are placed one on top of the other and fastened with a pair of bolts 8 and nuts 9, the lower end surface 4a of the stem 4 is tightened through the disc spring 16 by tightening the bolts 8. It is strongly pressed against the metal bearing block 6.
コネクテイングロツド３の大端部は、ステム４
に外嵌された金属枠５と金属ブロツク６から構成
されるので、機械強度が向上される。 The big end of the connecting rod 3 is connected to the stem 4.
Since it is composed of a metal frame 5 and a metal block 6 that are fitted on the outside, mechanical strength is improved.
ステム４のテーパ部の下端面４ａは、皿ばね１
６を介して金属軸受ブロツク６に弾性的に当接さ
れるので、ステム４にへたりが生じても、ステム
４の下端面４ａと金属軸受ブロツク６の上端面と
の間にガタや隙間が生じることがない。したがつ
て、ボルト８の締結部にガタが生じることも、ガ
タにより金属枠５が損傷することもない。 The lower end surface 4a of the tapered portion of the stem 4 is connected to the disc spring 1.
Since the stem 4 is elastically abutted on the metal bearing block 6 via the metal bearing block 6, even if the stem 4 becomes sag, there will be no looseness or gap between the lower end surface 4a of the stem 4 and the upper end surface of the metal bearing block 6. It never occurs. Therefore, no looseness occurs in the fastening portion of the bolt 8, and no damage to the metal frame 5 is caused by the looseness.
第３図に示すように、ボルト８に予め締付荷重
PSを加えて皿ばね１６に撓みδsを与えておけば、
スタム４がへたつて、金属枠５に対して寸法δ1だ
け変位しても、皿ばね１６の撓みはその分だけ減
じるが、なお締付荷重P1をボルト８に及ぼすか
ら、金属枠５によるステム４と金属軸受ブロツク
６との安定した結合状態が維持される。 As shown in Figure 3, a pre-tightening load is applied to the bolt 8.
If PS is added to give the disc spring 16 a deflection δs, then
Even if the stem 4 is flattened and displaced by the dimension δ1 with respect to the metal frame 5, the deflection of the disc spring 16 will be reduced by that amount, but since the tightening load P1 will still be applied to the bolt 8, the stem by the metal frame 5 will be 4 and the metal bearing block 6 are maintained in a stable state of connection.
FRP製のステム４は、主としてピストンの往
復運動に伴う長手方向の引張荷重と圧縮荷重とを
繰り返し受けるだけであるから、強度上の問題は
なく、クランク軸の回転に伴いコネクテイングロ
ツドの大端部に作用する曲げ荷重は、金属枠５と
金属軸受ブロツク６で支持されるので、全体が
FRP製のコネクテイングロツドにみられる肩部
の割れは生じない。 The FRP stem 4 is mainly subjected to repeated longitudinal tensile loads and compressive loads associated with the reciprocating movement of the piston, so there is no strength problem, and the connecting rod increases as the crankshaft rotates. The bending load acting on the end is supported by the metal frame 5 and metal bearing block 6, so the entire
The shoulder cracks that occur with FRP connecting rods do not occur.
なお、図示の実施例では、金属枠５と金属軸受
ブロツク６は軽量化のために上端に両側の肉部を
削除して肩部を形成し、下面中央にくぼみを設け
た、正面から見て逆Ｕ字形のものであるが、本考
案はこれに限定されるものではなく、金属枠５と
金属軸受ブロツク６は、全体としてほぼブロツク
状のもの（直方体）であつて、金属枠５はテーパ
穴１０を、金属軸受ブロツク６は下端面に半円形
のくぼみを６ｂをそれぞれ備えた単純なものでも
よい。 In the illustrated embodiment, the metal frame 5 and the metal bearing block 6 have the flesh on both sides removed to form shoulders at the upper end to reduce weight, and a recess is provided in the center of the lower surface, as seen from the front. Although the present invention is not limited to this, the metal frame 5 and the metal bearing block 6 are generally block-shaped (rectangular parallelepiped) as a whole, and the metal frame 5 is tapered. The metal bearing block 6 may have a simple hole 10 and a semicircular recess 6b on its lower end surface.
［考案の効果］
本考案は上述のように、互いに重ね合される金
属軸受ブロツクの下端面と金属軸受キヤツプの上
端面とにクランプピンを挟む半円形のくぼみを設
け、繊維強化複合材からなるステムの端部に末拡
がりになつている断面長方形のテーパ部を設け、
金属枠に設けた断面長方形のテーパ穴にステムの
テーパ部を嵌合し、テーパ部の下端面を皿ばねを
挟んで金属軸受ブロツクの上端面に突き合せ、金
属枠の下端面を金属軸受ブロツクの上端面に重ね
合せ、金属枠と金属軸受ブロツクと金属軸受キヤ
ツプを左右１対のボルトとナツトにより締結した
から、ステムにへたりによる寸法変化が生じて
も、寸法変化は皿ばねにより吸収され、ステムと
金属軸受ブロツクとの結合部の間に弛みやガタが
生じることはなく、常に安定した結合とクランク
ピン回りの強度が維持される。[Effects of the invention] As described above, the present invention provides a semicircular recess for sandwiching a clamp pin in the lower end surface of the metal bearing block and the upper end surface of the metal bearing cap, which are stacked on top of each other, and is made of fiber-reinforced composite material. A tapered part with a rectangular cross section that widens toward the end is provided at the end of the stem,
Fit the tapered part of the stem into a tapered hole with a rectangular cross section provided in the metal frame, and butt the lower end of the tapered part against the upper end of the metal bearing block with the disc spring in between, and then insert the lower end of the metal frame into the metal bearing block. The metal frame, metal bearing block, and metal bearing cap are superimposed on the upper end surface and fastened together with a pair of bolts and nuts on the left and right, so even if the stem undergoes dimensional changes due to fatigue, the dimensional changes are absorbed by the disc spring. There is no slack or play between the joint between the stem and the metal bearing block, and a stable joint and strength around the crank pin are always maintained.
大端部を除くステムが繊維強化複合材により成
形されるから、形状が簡単で、加工が容易であ
る。 Since the stem except the large end is molded from a fiber-reinforced composite material, the shape is simple and processing is easy.
第１図は本考案に係る内燃機関のコネクテイン
グロツドの正面図、第２図は同コネクテイングロ
ツドを分解して示す正面断面図、第３図はボルト
の締付荷重と皿ばねの撓みとの関係を表す線図で
ある。
４……ステム、５……金属枠、６……金属軸受
ブロツク、７……金属軸受キヤツプ、８……ボル
ト、９……ナツト、１０……テーパ穴、１３，１
３ａ……くぼみ、１６……皿ばね。
Fig. 1 is a front view of a connecting rod for an internal combustion engine according to the present invention, Fig. 2 is an exploded front cross-sectional view of the same connecting rod, and Fig. 3 is a diagram showing the tightening load of the bolt and the impact of the disc spring. It is a line diagram showing the relationship with deflection. 4... Stem, 5... Metal frame, 6... Metal bearing block, 7... Metal bearing cap, 8... Bolt, 9... Nut, 10... Tapered hole, 13, 1
3a... recess, 16... disc spring.
Claims (1)
と金属軸受キヤツプの上端面とにクランクピンを
挟む半円形のくぼみを設け、繊維強化複合材から
なるステムの端部に末拡がりになつている断面長
方形のテーパ部を設け、金属枠に設けた断面長方
形のテーパ穴にステムのテーパ部を嵌合し、テー
パ部の下端面を皿ばねを挟んで金属軸受ブロツク
の上端面に突き合せ、金属枠の下端面を金属軸受
ブロツクの上端面に重ね合せ、金属枠と金属軸受
ブロツクと金属軸受キヤツプを左右１対のボルト
とナツトにより締結したことを特徴とする、内燃
機関のコネクテイングロツド。 A semicircular recess is provided between the lower end surface of the metal bearing block and the upper end surface of the metal bearing cap, which are stacked on top of each other, to sandwich the crank pin, and the end of the stem made of fiber-reinforced composite material is rectangular in cross section. The tapered part of the stem is fitted into the tapered hole with a rectangular cross section provided in the metal frame, and the lower end of the tapered part is butted against the upper end of the metal bearing block with the disc spring in between. A connecting rod for an internal combustion engine, characterized in that a lower end surface is overlapped with an upper end surface of a metal bearing block, and a metal frame, a metal bearing block, and a metal bearing cap are fastened by a pair of left and right bolts and nuts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986191805U JPH0443619Y2 (en) | 1986-12-15 | 1986-12-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986191805U JPH0443619Y2 (en) | 1986-12-15 | 1986-12-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6397719U JPS6397719U (en) | 1988-06-24 |
| JPH0443619Y2 true JPH0443619Y2 (en) | 1992-10-15 |
Family
ID=31146289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986191805U Expired JPH0443619Y2 (en) | 1986-12-15 | 1986-12-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0443619Y2 (en) |
-
1986
- 1986-12-15 JP JP1986191805U patent/JPH0443619Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6397719U (en) | 1988-06-24 |
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