JPH0261316A - Exhaust device for motorcycle - Google Patents
Exhaust device for motorcycleInfo
- Publication number
- JPH0261316A JPH0261316A JP21012388A JP21012388A JPH0261316A JP H0261316 A JPH0261316 A JP H0261316A JP 21012388 A JP21012388 A JP 21012388A JP 21012388 A JP21012388 A JP 21012388A JP H0261316 A JPH0261316 A JP H0261316A
- Authority
- JP
- Japan
- Prior art keywords
- absorbing material
- sound absorbing
- outer cylinder
- decorative
- secured
- 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
- 239000002184 metal Substances 0.000 claims abstract description 19
- 239000011358 absorbing material Substances 0.000 claims abstract description 18
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 238000004080 punching Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000005192 partition Methods 0.000 abstract description 3
- 239000011491 glass wool Substances 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000007747 plating Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、自動二輪車用排気装置に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to an exhaust system for a motorcycle.
自動二輪車用排気装置は、円筒形のマフラ内にパーティ
ションに仕切られている複数の膨張室を有し、エンジン
から吐き出される排気ガスは、各膨張室の壁から壁へ反
射し右往左往する間に干渉しあって音波が吸収、撹乱さ
れ、テールパイプを経て大気に排出される。Exhaust systems for motorcycles have multiple expansion chambers divided into partitions within a cylindrical muffler, and the exhaust gas discharged from the engine is reflected from wall to wall of each expansion chamber, causing interference as it moves back and forth. As a result, the sound waves are absorbed, disturbed, and emitted into the atmosphere through the tailpipe.
従来、上記マフラの構造は、マフラの外筒の内周面に適
宜吸音材を取付け、さらにマフラの外筒の外周面にメツ
キ等を施した化粧外板を巻回して溶接固定し、美観を高
めていた。Conventionally, the structure of the above muffler was to attach appropriate sound absorbing material to the inner circumferential surface of the muffler's outer cylinder, and then wrap a decorative outer plate with plating etc. on the outer circumferential surface of the muffler's outer cylinder and fix it by welding to improve the aesthetic appearance. It was increasing.
しかしながら、上記従来のマフラの構造においては、マ
フラの外筒の外周面に化粧外板を溶接固定しているが、
これは、外筒そのものを化粧外板にすると、化粧外板の
メツキ部分が熱に弱く変色してしまうためである。その
ために、その分だけ重量が増大するという問題を有して
いた。However, in the conventional muffler structure described above, a decorative outer plate is welded and fixed to the outer peripheral surface of the outer cylinder of the muffler.
This is because if the outer cylinder itself is made into a decorative outer panel, the plating portion of the decorative outer panel will be susceptible to heat and discolor. Therefore, there was a problem in that the weight increased accordingly.
本発明の課題は、上記問題を解決するものであって重量
を軽減できる自動二輪車用排気装置を提供することを目
的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide an exhaust system for a motorcycle that solves the above problems and can reduce weight.
上記課題を解決するために本発明は、マフラの内周面一
部に吸音材を設け、マフラ外筒の外周面に化粧外板を設
けた自動二輪車用排気装置において、前記吸音材を前記
化粧外板とパンチングメタル部により支持し該パンチン
グメタル部により膨張室を形成すると共に、前記外筒内
にさらに膨張室を形成することを特徴とする。In order to solve the above problems, the present invention provides an exhaust system for a motorcycle in which a sound absorbing material is provided on a part of the inner peripheral surface of a muffler and a decorative outer plate is provided on the outer peripheral surface of the muffler outer cylinder. It is characterized in that it is supported by an outer plate and a punched metal portion, and an expansion chamber is formed by the punched metal portion, and an expansion chamber is further formed within the outer cylinder.
本発明においては、例えば第１図および第２図に示すよ
うに、吸音材２６をパンチングメタル部２７に挿入した
後、これを化粧外板２５に挿入し、フランジ２３、パン
チングメタル部２７および接続バイブ３２の３部材を溶
接固定し、また、化粧外板２５と外筒２９を、プラグ溶
接用孔２５ｂを介してプラグ溶接する。従って、吸音材
２６の部分に外筒２９が存在しないため、その分マフラ
の重量が軽くなると共に、化粧外板２５は吸音材２６の
断熱効果により変色することもない。In the present invention, as shown in FIGS. 1 and 2, for example, after inserting the sound absorbing material 26 into the punched metal part 27, this is inserted into the decorative outer panel 25, and the flange 23, the punched metal part 27, and the connection The three members of the vibrator 32 are welded and fixed, and the decorative outer panel 25 and the outer cylinder 29 are plug welded through the plug welding hole 25b. Therefore, since the outer cylinder 29 is not present in the sound absorbing material 26, the weight of the muffler is reduced accordingly, and the decorative outer panel 25 does not discolor due to the heat insulating effect of the sound absorbing material 26.
以下、本発明の実施例を図面を参照しつつ説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第８図は本発明が適用される自動二輪車の全体側面図を
示し、自動二輪車１の車体フレーム２におけるヘッドバ
イブ３には、フロントフォーク４が旋回可能に支持され
、その下部には前端５が設けられ、上部にはハンドル６
が設けられている。FIG. 8 shows an overall side view of a motorcycle to which the present invention is applied. A front fork 4 is rotatably supported on a head vibrator 3 of a body frame 2 of the motorcycle 1, and a front end 5 is attached to the lower part of the head vibe 3. A handle 6 is provided at the top.
is provided.
また、ヘッドバイブ３から後方に延びるメインフレーム
７の後端には、リヤアーム８を介して後輪が支持され、
一方、メインフレーム７の上方はタンクカバー１０で覆
われている。さらに、メインフレーム７の後方にはシー
トレール１１が接続され、このシートレール１１にシー
１−１２が設けられている。Further, a rear wheel is supported at the rear end of the main frame 7 extending rearward from the head vibe 3 via a rear arm 8.
On the other hand, the upper part of the main frame 7 is covered with a tank cover 10. Further, a seat rail 11 is connected to the rear of the main frame 7, and a seat 1-12 is provided on this seat rail 11.
メインフレーム７の前端から下方に延びるダウンチュー
ブ１３とメインフレーム７との間には、内燃機関１４が
搭載され、この内燃機関を構成するシリンダ１５には、
吸気管１６を介して気化器１７およびエアクリーナ１８
が接続され、また、排気管１９がシリンダ１５から前側
から車体下方を通って、後方へ延びマフラ２２に接続さ
れている。自動二輪車１の前面と側部は、カウリング２
１で覆われており、前部開口部から走行風が導入され、
ラジェータ２０を通過する際に内燃機関１４を冷却する
冷却水と熱交換を行うように構成されている。An internal combustion engine 14 is mounted between the main frame 7 and a down tube 13 extending downward from the front end of the main frame 7, and a cylinder 15 constituting this internal combustion engine includes:
A carburetor 17 and an air cleaner 18 via an intake pipe 16
Further, an exhaust pipe 19 extends from the cylinder 15 from the front side through the lower part of the vehicle body to the rear and is connected to the muffler 22. The front and sides of the motorcycle 1 are covered with a cowling 2.
1, and the running wind is introduced from the front opening,
It is configured to exchange heat with cooling water that cools the internal combustion engine 14 when passing through the radiator 20 .
次に第１図および第２図により本発明の自動−輪車用排
気装置の１実施例について説明する。Next, one embodiment of the exhaust system for a motor vehicle according to the present invention will be described with reference to FIGS. 1 and 2.
マフラ２２は、第２図に示すように、内面にフランジ２
３および外面に車体取付用ステー２４が溶接固定された
化粧外板２５と、グラスウール等の吸音材２６と、パン
チングメタル部２７が溶接固定された外筒２９とから構
成されている。これを第１図によりさらに詳述すると、
化粧外板２５の内周面にフランジ２３の一端が全周的に
溶接され、他端が排気管１９ａに溶接された接続バイブ
３２に全周的に溶接されている。また、化粧外板２５に
は、リベット用孔２５ａおよびプラグ溶接用孔２５ｂが
設けられている。As shown in FIG. 2, the muffler 22 has a flange 2 on the inner surface.
3, a decorative outer panel 25 to which a vehicle body mounting stay 24 is welded and fixed, a sound absorbing material 26 such as glass wool, and an outer cylinder 29 to which a punched metal part 27 is welded and fixed. To explain this in more detail using Figure 1,
One end of the flange 23 is welded all around the inner peripheral surface of the decorative outer panel 25, and the other end is welded all the way around to a connecting vibe 32 welded to the exhaust pipe 19a. Further, the decorative outer panel 25 is provided with a rivet hole 25a and a plug welding hole 25b.
一方、外筒２９の一側には、パーティション３０を介し
てパンチングメタル部２７が予め溶接され、膨張室３１
ａが形成されると共に、外筒２９の他側には、エツジプ
レート３３が溶接され、外筒２９内に膨張室３１ｂを形
成している。On the other hand, a punching metal part 27 is welded in advance to one side of the outer cylinder 29 via a partition 30, and an expansion chamber 31
a is formed, and an edge plate 33 is welded to the other side of the outer cylinder 29 to form an expansion chamber 31b within the outer cylinder 29.
その組立順序は、先ず、吸音材２６をパンチングメタル
部２７に挿入した後、これを化粧外板２５に挿入し、フ
ランジ２３、パンチングメタル部２７および接続パイプ
３２の３部材を全周的に溶接固定し、また、化粧外板２
５と外筒２９を、プラグ溶接用孔２５ｂを介してプラグ
溶接した後、最後に遮蔽板３５をリヘン１−３６により
取付固定する。The assembly order is as follows: First, the sound absorbing material 26 is inserted into the punched metal part 27, then this is inserted into the decorative outer panel 25, and the three members, the flange 23, the punched metal part 27, and the connecting pipe 32, are welded around the entire circumference. Fixed and also decorative outer panel 2
5 and the outer cylinder 29 are plug welded through the plug welding hole 25b, and finally, the shielding plate 35 is attached and fixed by the wire 1-36.
従って、本実施例によれば、吸音材２６の部分に外筒２
９が存在しないため、その分マフラの重量が軽くなると
共に、化粧外板２５は吸音材２６の断熱効果により変色
することもない。また、車体取付用ステー２４は、化粧
外板２５、フランジ２３、接続バイブ３２および排気管
１９ａと一体構造になっており、排気管１９ａに取付け
られる取付用ブラケットとともにマフラを車体に強固に
支持することができる。さらに、車体取付用ステー２４
は、化粧外板２５に予め溶接固定されるため、マフラの
組立前に車体取付用ステー２４と化粧外板２５をメツキ
することができ、従来のように化粧外板２５に切欠を設
け、マフラ組立後に車体取付用ステーを外筒に溶接固定
するのに比較して、美観を向上させることができる。Therefore, according to this embodiment, the outer cylinder 2 is attached to the sound absorbing material 26.
9 is not present, the weight of the muffler is reduced accordingly, and the decorative outer panel 25 does not discolor due to the heat insulating effect of the sound absorbing material 26. Further, the vehicle body mounting stay 24 has an integral structure with the decorative outer panel 25, the flange 23, the connecting vibe 32, and the exhaust pipe 19a, and firmly supports the muffler on the vehicle body together with the mounting bracket attached to the exhaust pipe 19a. be able to. Furthermore, the stay 24 for mounting the vehicle body
is welded and fixed to the decorative outer panel 25 in advance, so the vehicle body mounting stay 24 and the decorative outer panel 25 can be plated before assembling the muffler. The aesthetic appearance can be improved compared to welding and fixing the vehicle body mounting stay to the outer cylinder after assembly.
次に第３図および第４図により本発明の他の実施例につ
いて説明する０図中、３９は化粧外板２５に予め溶接さ
れるフランジであり、複数箇所にプラグ溶接用孔３９ａ
が形成された凹部３９ｂと、外周に鍔部３９ｃを有して
いる。また、パンチングメタル部２７の先端には、接続
リング３７が予め溶接されている。そして、吸音材２６
をパンチングメタル部２７に挿入した後、これを化粧外
板２５に挿入し、接続リング３７とフランジ３９をプラ
グ溶接により固定するものである。本実施例においては
、パンチングメタル部２７がフランジ３９のみに溶接さ
れるため溶接作業が簡単となる。Next, another embodiment of the present invention will be explained with reference to FIGS. 3 and 4. In FIG.
It has a concave portion 39b in which is formed, and a flange portion 39c on the outer periphery. Furthermore, a connecting ring 37 is welded to the tip of the punched metal portion 27 in advance. And sound absorbing material 26
is inserted into the punched metal portion 27, then inserted into the decorative outer panel 25, and the connecting ring 37 and flange 39 are fixed by plug welding. In this embodiment, the punched metal portion 27 is welded only to the flange 39, which simplifies the welding work.
第５図は本発明のさらに他の実施例を示している。化粧
外板２５の端部に絞り部２５ｃを設け、この絞り部２５
ｃと接続パイプ３２とを溶接し、遮蔽板３５を化粧外板
２５にリベット３６により取付固定する。本実施例にお
いては、空間４０が狭く形成されるため、よりコンパク
トになる。FIG. 5 shows yet another embodiment of the invention. A constricted portion 25c is provided at the end of the decorative outer panel 25, and this constricted portion 25
c and the connecting pipe 32 are welded, and the shielding plate 35 is attached and fixed to the decorative outer panel 25 with rivets 36. In this embodiment, since the space 40 is formed narrowly, it becomes more compact.
ところで、上記マフラ２２の排気管１９ａは、第６図に
示すジヨイント構造により、本体側の排気管１９に接続
される。すなわち、排気管１９ａの先端には複数のスリ
ット４１が設けられ、スリット４１の奥に設けられる係
合孔４１ａに本体側の排気管１９の外周に設けられる突
起（図示せず）が挿入、係合される。４２は排気管１９
の外周に嵌合、締め付は固定される締付バンドであり、
その内周面には前記スリット４１に対向して突起４２ａ
が形成されると共に、端部に締め付は用のネジ４２ｂが
設けられている。そして、締付バンド４２の突起４２ａ
をスリット４１内に挿入するとき、スリットの長手方向
の長さしとスリット間の角度αによって、締付バンド４
２の位置決めがなされる。Incidentally, the exhaust pipe 19a of the muffler 22 is connected to the exhaust pipe 19 on the main body side by a joint structure shown in FIG. That is, a plurality of slits 41 are provided at the tip of the exhaust pipe 19a, and a protrusion (not shown) provided on the outer periphery of the exhaust pipe 19 on the main body side is inserted into and engaged with an engagement hole 41a provided at the back of the slit 41. will be combined. 42 is the exhaust pipe 19
It is a tightening band that fits on the outer periphery of the
A protrusion 42a is provided on the inner peripheral surface of the protrusion 42a facing the slit 41.
is formed, and a screw 42b for tightening is provided at the end. Then, the protrusion 42a of the tightening band 42
When inserting the tightening band 4 into the slit 41, the length of the slit in the longitudinal direction and the angle α between the slits
2 positioning is performed.
その締め付は方法について説明する。第７図（イ）は締
め付は前の状態を示し、締付バンド４２の突起４２ａと
スリット４２との間にクリアランスがある状態を示して
いる。この状態がら締付バンド４２のネジ４２ｂを締め
付けると、第７図（ロ）に示すように突起突起４２ａと
スリット４２との間のクリアランスがなくなる位置で固
定されることになる。従って、締め付は力を常に一定に
することができる。The method of tightening will be explained below. FIG. 7(A) shows a state before tightening, and shows a state where there is a clearance between the protrusion 42a of the tightening band 42 and the slit 42. When the screw 42b of the tightening band 42 is tightened in this state, the band 42 is fixed at a position where there is no clearance between the protrusion 42a and the slit 42, as shown in FIG. 7(b). Therefore, the tightening force can always be kept constant.
以上のように本発明によれば、吸音材がある部分の外筒
を省略するために、マフラの重量を軽減できると共に、
化粧外板の変色を防止することができる。As described above, according to the present invention, since the outer cylinder is omitted in the part where the sound absorbing material is located, the weight of the muffler can be reduced, and
Discoloration of decorative exterior panels can be prevented.
【図面の簡単な説明】
第１図は本発明の自動二輪車用排気装置の１実施例を示
す断面図、第２図は第１図における構成部品の斜視図、
第３図は本発明の他の実施例を示す断面図、第４図は第
３図の要部斜視図、第５図は本発明のさらに他の実施例
を示す断面図、第６図は排気管のジヨイント部を示す斜
視図、第７図（イ）、（ロ）は排気管の締め付は方法を
説明するための図、第８図は本発明が適用される自動二
輪車の側面図である。
１９ａ・・・排気管、２２・・・マフラ、２３・・・フ
ランジ、２４・・・車体取付用ステー、２５・・・化粧
外板、２６・・・吸音材、２７・・・パンチングメタル
部、２９・・・外筒、３１ａ、３１ｂ・・・膨張室。
特許出願人 ヤマハ発動機株式会社代理人弁理士
白 井 博 樹（外４名）第１
図
第２図
５ｂ
第５
図
第
図
（イ）
第３
図
第４
図[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a sectional view showing one embodiment of the motorcycle exhaust system of the present invention, FIG. 2 is a perspective view of the components in FIG. 1,
FIG. 3 is a sectional view showing another embodiment of the present invention, FIG. 4 is a perspective view of the main part of FIG. 3, FIG. 5 is a sectional view showing still another embodiment of the invention, and FIG. A perspective view showing the joint part of the exhaust pipe, FIGS. 7(a) and 7(b) are diagrams for explaining the method of tightening the exhaust pipe, and FIG. 8 is a side view of a motorcycle to which the present invention is applied. It is. 19a... Exhaust pipe, 22... Muffler, 23... Flange, 24... Vehicle body mounting stay, 25... Decorative outer plate, 26... Sound absorbing material, 27... Punching metal part , 29... Outer cylinder, 31a, 31b... Expansion chamber. Patent applicant Yamaha Motor Co., Ltd. Representative Patent Attorney
Hiroki Shirai (4 others) Figure 1 Figure 2 Figure 5b Figure 5 Figure (A) Figure 3 Figure 4
Claims (1)
の外周面に化粧外板を設けた自動二輪車用排気装置にお
いて、前記吸音材を前記化粧外板とパンチングメタル部
により支持し該パンチングメタル部により膨張室を形成
すると共に、前記外筒内にさらに膨張室を形成すること
を特徴とする自動二輪車用排気装置。(1) In an exhaust system for a motorcycle in which a sound absorbing material is provided on a part of the inner peripheral surface of the muffler and a decorative outer panel is provided on the outer peripheral surface of the muffler outer cylinder, the sound absorbing material is supported by the decorative outer panel and the punching metal part. An exhaust system for a motorcycle, characterized in that an expansion chamber is formed by the punched metal portion, and an expansion chamber is further formed within the outer cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63210123A JP2746605B2 (en) | 1988-08-24 | 1988-08-24 | Exhaust system for motorcycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63210123A JP2746605B2 (en) | 1988-08-24 | 1988-08-24 | Exhaust system for motorcycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0261316A true JPH0261316A (en) | 1990-03-01 |
| JP2746605B2 JP2746605B2 (en) | 1998-05-06 |
Family
ID=16584179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63210123A Expired - Fee Related JP2746605B2 (en) | 1988-08-24 | 1988-08-24 | Exhaust system for motorcycle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2746605B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2136042A1 (en) * | 2008-06-18 | 2009-12-23 | Yamaha Hatsudoki Kabushiki Kaisha | Exhaust system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55158209U (en) * | 1979-05-02 | 1980-11-13 | ||
| JPS648525U (en) * | 1987-07-07 | 1989-01-18 |
-
1988
- 1988-08-24 JP JP63210123A patent/JP2746605B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55158209U (en) * | 1979-05-02 | 1980-11-13 | ||
| JPS648525U (en) * | 1987-07-07 | 1989-01-18 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2136042A1 (en) * | 2008-06-18 | 2009-12-23 | Yamaha Hatsudoki Kabushiki Kaisha | Exhaust system |
| US8136628B2 (en) | 2008-06-18 | 2012-03-20 | Yamaha Hatsudoki Kabushiki Kaisha | Exhaust system for motorcycle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2746605B2 (en) | 1998-05-06 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |