JPS6158648B2 - - Google Patents
Info
- Publication number
- JPS6158648B2 JPS6158648B2 JP53143816A JP14381678A JPS6158648B2 JP S6158648 B2 JPS6158648 B2 JP S6158648B2 JP 53143816 A JP53143816 A JP 53143816A JP 14381678 A JP14381678 A JP 14381678A JP S6158648 B2 JPS6158648 B2 JP S6158648B2
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical body
- muffler
- band
- support member
- cylindrical
- 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
Landscapes
- Exhaust Silencers (AREA)
Description
【発明の詳細な説明】
本発明は、自動二輪車等車両に使用されるマフ
ラー、特に、２つの半筒体を互に固着して形成さ
れる筒状体と、外周に帯状リング部を有し前記筒
状体の内部に配設されてこれを支持する１または
複数の支持部材を備え、エンジンの排気を前記筒
状体内に導びいた後外部へ排出するようにしたマ
フラーの改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a muffler used in a vehicle such as a motorcycle, and particularly a muffler having a cylindrical body formed by fixing two half-cylindrical bodies to each other, and a band-shaped ring portion on the outer periphery. The present invention relates to an improvement in a muffler that includes one or more support members disposed inside the cylindrical body to support the same, and which guides engine exhaust gas into the cylindrical body and then discharges it to the outside.
一般に、エンジンから排出される排気は常に圧
力変動をともなつていて、排気がこの種マフラー
に導びかれると、排気の有する圧力変動によつて
前記マフラーの外板、すなわち筒状体が振動して
外部へ騒音（所謂シエル音）を発生させる。この
騒音を抑制するために、マフラーを構成する筒状
体の内壁全面にグラスウール等振動吸収材を貼着
し、或いは前記筒状体の形状を変更してその剛性
を高める手段が採られている。しかしながら、前
者においてはシエル音の抑制効果は高いものの経
済的に極めて不利であり、また後者においてはシ
エル音の抑制効果が充分とはいえない。 Generally, the exhaust gas discharged from an engine is always accompanied by pressure fluctuations, and when the exhaust gas is led to this type of muffler, the pressure fluctuations in the exhaust gas cause the outer plate of the muffler, that is, the cylindrical body, to vibrate. to generate noise (so-called ciel sound) to the outside. In order to suppress this noise, measures have been taken to increase the rigidity of the cylindrical body by attaching a vibration absorbing material such as glass wool to the entire inner wall of the cylindrical body that constitutes the muffler, or by changing the shape of the cylindrical body. . However, in the former case, although the effect of suppressing the shell sound is high, it is economically disadvantageous, and in the latter case, the effect of suppressing the shell sound cannot be said to be sufficient.
本発明は、このような実状に鑑みなされたもの
で、その主たる目的は、シエル音の抑制効果が高
いマフラーを経済的に有利に提供するにあり、以
下本発明の一実施例を図面に基づいて説明する。 The present invention was made in view of the above-mentioned circumstances, and its main purpose is to provide an economically advantageous muffler that is highly effective in suppressing shell noise.One embodiment of the present invention will be described below based on the drawings. I will explain.
第１図は、本発明に係るマフラーを組付けた自
動二輪車の後部側面を示している。このマフラー
は、第２図〜第４図に示すように、２つの半筒体
１１ａ，１１ｂにて形成された筒状体１０と、外
周に帯状のリング部２１を有し筒状体１０の内部
に配設された３つの支持部材２０ａ，２０ｂ，２
０ｃを備えている。半筒体１１ａ，１１ｂはその
周縁にフランジ部１１１を備えていて、このフラ
ンジ部１１１を互いに強圧して突合せた状態にて
シーム溶接されて筒状体１０を形成している。ま
た、半筒体１１ａ，１１ｂはその内壁に、半筒体
１１ａ，１１ｂを外方へ突出させて当該部位に形
成された帯状の溝部と内方へ突出させて当該部位
の側部に形成された帯状の溝部とを備えていて、
これらの溝部により、筒状体１０の内壁全周に２
種の帯状の溝部１２ａ，１２ｂが形成されてい
る。一方、支持部材２０ａ，２０ｂ，２０ｃは、
それらのリング部２１を筒状体１０の溝部１２
ａ，１２ａ，１２ｂに嵌合した状態で半筒体１１
ａ，１１ｂにて挾圧支持されていて、筒状体１０
内を３つの室R1〜R3に区画している。これらの
支持部材２０ａ，２０ｂ，２０ｃのうち、支持部
材２０ａ，２０ｃは隔壁部を備えていて、筒状体
１０の略中央に、支持部材２０ｂのくり抜孔２２
を介して互に連通する第１膨張室R1が形成され
ている。なお、支持部材２０ｃと筒状体１０の前
部により形成された室R2は第２膨張室となつて
おり、また支持部材２０ａと筒状体１０の後部に
より形成された室R3は第３膨張室となつてい
る。第１膨張室R1は、エンジンＥの排気が最初
に導びかれる室で、その内部には、エキゾースト
パイプ３０に接続されて支持部材２０ｃを気密的
に貫通する第１デイフユーザパイプ４１の一端が
開口している。この第１膨張室R1は、半筒体１
１ｂの側部略中央における膨出部１１２に形成し
た通路Ｐにより第２膨張室R2に連通している。
第２膨張室R2と第３膨張室R3には、支持部材２
０ｃを気密的に貫通して支持部材２０ｂのくり抜
孔２２を通り支持部材２０ａを気密的に貫通する
第２デイフユーザパイプ４２の両端がそれぞれ開
口している。これにより、第２膨張室R2は第３
膨張室R3に連通しており、また第３膨張室R3は
排出パイプ４３により外部に連通している。な
お、第１デイフユーザパイプ４１の先端部には多
数の通孔４１１が穿設されていて、その外周と当
該外周に気密的に固着されて当該外周を覆蓋する
外筒４１２とにより共鳴室ｒが形成されている。 FIG. 1 shows the rear side of a motorcycle equipped with a muffler according to the present invention. As shown in FIGS. 2 to 4, this muffler has a cylindrical body 10 formed of two half-cylindrical bodies 11a and 11b, and a band-shaped ring portion 21 on the outer periphery of the cylindrical body 10. Three support members 20a, 20b, 2 arranged inside
It is equipped with 0c. The half-cylindrical bodies 11a and 11b are provided with a flange portion 111 on their periphery, and the flange portions 111 are pressed against each other and seam-welded to form the cylindrical body 10. Further, the half-cylindrical bodies 11a, 11b have band-shaped grooves formed on the inner walls of the parts by causing the half-cylindrical bodies 11a, 11b to protrude outward and formed in the side parts of the parts by making the half-cylindrical bodies 11a, 11b project inward. It is equipped with a band-shaped groove part,
These grooves provide two grooves along the entire circumference of the inner wall of the cylindrical body 10.
Seed band-shaped grooves 12a and 12b are formed. On the other hand, the supporting members 20a, 20b, 20c are
These ring parts 21 are connected to the groove part 12 of the cylindrical body 10.
a, 12a, 12b in a state where the half cylinder body 11 is fitted.
The cylindrical body 10 is supported by clamping pressure at a and 11b.
The interior is divided into three chambers R 1 to R 3 . Among these support members 20a, 20b, 20c, the support members 20a, 20c are provided with a partition wall portion, and a hollow hole 22 of the support member 20b is formed approximately in the center of the cylindrical body 10.
A first expansion chamber R1 is formed which communicates with each other via. Note that the chamber R2 formed by the support member 20c and the front part of the cylindrical body 10 is a second expansion chamber, and the chamber R3 formed by the support member 20a and the rear part of the cylindrical body 10 is a second expansion chamber. It has 3 expansion chambers. The first expansion chamber R1 is a chamber to which the exhaust gas of the engine E is first introduced, and therein is a first diffuser pipe 41 that is connected to the exhaust pipe 30 and passes through the support member 20c in an airtight manner. One end is open. This first expansion chamber R 1 is a semi-cylindrical body 1
It communicates with the second expansion chamber R 2 through a passage P formed in the bulge 112 approximately in the center of the side of 1b.
A support member 2 is provided in the second expansion chamber R 2 and the third expansion chamber R 3 .
Both ends of the second diffuser pipe 42, which airtightly penetrates through the support member 20a through the hollow hole 22 of the support member 20b, are open. As a result, the second expansion chamber R2 becomes the third expansion chamber R2.
It communicates with the expansion chamber R 3 , and the third expansion chamber R 3 communicates with the outside through a discharge pipe 43 . Note that a large number of through holes 411 are bored at the tip of the first diffuser pipe 41, and a resonance chamber is formed by the outer periphery of the holes 411 and an outer cylinder 412 that is airtightly fixed to the outer periphery and covers the outer periphery. r is formed.
しかして、支持部材２０ａ，２０ｂのリング部
２１，２１と筒状体１０の溝部１２ａ，１２ａと
の間には、特に第５図および第６図に拡大して示
したように、グラスウール、石綿等により帯状に
形成してなる柔軟で圧縮可能な弾性部材５０，５
０が介在されている。すなわち、支持部材２０
ａ，２０ｂは、それらのリング部２１，２１の全
周を筒状体１０の溝部１２ａ，１２ａに嵌合させ
た弾性部材５０，５０の内周面に当接した状態
で、半筒体１１ａ，１１ｂにて挾圧支持されてい
る。 Therefore, between the ring parts 21, 21 of the support members 20a, 20b and the groove parts 12a, 12a of the cylindrical body 10, as shown in particular in enlarged form in FIGS. 5 and 6, glass wool, asbestos, etc. A flexible and compressible elastic member 50, 5 formed into a band shape by
0 is interposed. That is, the support member 20
a, 20b are in contact with the inner peripheral surfaces of elastic members 50, 50, which are fitted into the grooves 12a, 12a of the cylindrical body 10, with the entire circumferences of the ring parts 21, 21 attached to the semi-cylindrical body 11a. , 11b.
このように構成したマフラーにおいて、エンジ
ンＥの排気は、先づエキゾーストパイプ３０およ
び第１デイフユーザパイプ４１を通つて第１膨張
室R1に導びかれ、次いで半筒体１１ｂの膨出部
１１２に形成された通路Ｐを通つて第２膨張室
R2に、さらに第２デイフユーザパイプ４２を通
つて第３膨張室R3に導びかれ、最後に第３膨張
室R3から排出パイプ４３を通つて外部へ排出さ
れる。この間、排気は筒状体１０内で膨張、拡
散、収縮等を繰返して、その排気騒音が消音され
て外部へ排出される。 In the muffler configured in this way, the exhaust gas from the engine E is first guided to the first expansion chamber R1 through the exhaust pipe 30 and the first diffuser pipe 41, and then to the bulge part of the half cylinder body 11b. 112 through the passage P formed in the second expansion chamber.
R 2 and further through the second diffuser pipe 42 to the third expansion chamber R 3 , and finally from the third expansion chamber R 3 through the discharge pipe 43 to be discharged to the outside. During this time, the exhaust gas repeats expansion, diffusion, contraction, etc. within the cylindrical body 10, and the exhaust noise is muffled and exhausted to the outside.
ところで、本実施例においては、特に、排気圧
が最も高く筒状体１０の周方向への部分的変形が
最も大きい第１デイフユーザパイプ４１の一端開
口部近傍に位置する支持部材２０ａ，２０ｂを、
これらのリング部２１，２１と筒状体１０の溝部
１２ａ，２ａとの間に柔軟で圧縮可能な帝状の弾
性部材５０，５０を介在させて、半筒体１１ａ，
１１ｂにて挾圧支持させている。このため、排気
の圧力変動により筒状体１０が変形するとき、筒
状体１０と支持部材２０ａ，２０ｂの間の隙間に
変化を生じ、その間に挾圧支持された柔軟で圧縮
可能な帯状の弾性部材５０，５０の厚さ方向の変
化に伴う内部摩擦損失によつて振動エネルギーを
吸収する。従つて、排気の圧力変動に起因するる
振動が著しく抑制され、この振動に起因するシエ
ル音は効果的に抑制される。 By the way, in this embodiment, in particular, the support members 20a and 20b are located near the opening at one end of the first diffuser pipe 41, where the exhaust pressure is highest and the partial deformation of the cylindrical body 10 in the circumferential direction is greatest. of,
Flexible and compressible imperial-shaped elastic members 50, 50 are interposed between these ring parts 21, 21 and groove parts 12a, 2a of the cylindrical body 10, and the semi-cylindrical body 11a,
It is supported with clamping pressure at 11b. Therefore, when the cylindrical body 10 is deformed due to pressure fluctuations in the exhaust gas, the gap between the cylindrical body 10 and the supporting members 20a and 20b changes, and a flexible and compressible band-like material is supported between the cylindrical body 10 and the supporting members 20a and 20b. Vibration energy is absorbed by internal friction loss caused by changes in the thickness direction of the elastic members 50, 50. Therefore, vibrations caused by pressure fluctuations in the exhaust gas are significantly suppressed, and shell noise caused by these vibrations is effectively suppressed.
なお、本実施例は筒状体１０の溝部１２ａ，１
２ａと支持部材２０ａ，２０ｂのリング部２１，
２１との間に柔軟で圧縮可能な帯状の弾性部材５
０，５０を介在させた例について示したが、本発
明においては弾性部材５０を、溝部１２ａと支持
部材２０ｂのリング部２１間のみに介在させても
よく、また溝部１２ｂと支持部材２０ｃのリング
部２１間にも介在させてもよい。要するに、本発
明においては、筒状体の溝部と少くとも１つの支
持部材のリング部間に弾性部材を介在させればよ
い。この場合、排気圧が最も高く筒状体の周方向
への部分的変形が最も大きい部位に近接している
支持部材から優先して、弾性部材を介して挾圧支
持することが望ましい。また、本発明において
は、支持部材が筒状体の支持機能のみを備えてい
れば十分な場合には、単に帯状のリング部のみか
らなるリング状支持部材を採用することもでき
る。 Note that in this embodiment, the grooves 12a, 1 of the cylindrical body 10
2a and the ring portion 21 of the support members 20a, 20b,
21, a flexible and compressible band-shaped elastic member 5
In the present invention, the elastic member 50 may be interposed only between the groove portion 12a and the ring portion 21 of the support member 20b, or between the groove portion 12b and the ring portion of the support member 20c. It may also be interposed between the portions 21. In short, in the present invention, the elastic member may be interposed between the groove portion of the cylindrical body and the ring portion of at least one support member. In this case, it is preferable to give preference to the support member closest to the portion where the exhaust pressure is highest and the partial deformation in the circumferential direction of the cylindrical body is greatest, and to support the support member with clamping pressure via the elastic member. Furthermore, in the present invention, if it is sufficient for the support member to have only the function of supporting the cylindrical body, a ring-shaped support member consisting solely of a band-shaped ring portion may be employed.
以上、詳述したように、本発明は、２つの半筒
体を互に固着して形成される筒状体と、外周に帯
状リング部を有し前記筒状体の内部に配設されて
これを支持する１または複数の支持部材を備え、
エンジンの排気を前記筒状体内に導びいた後外部
へ排出するようにしたマフラーにおいて、前記支
持部材の少くとも１つがそのリング部を柔軟で圧
縮可能な帯状の弾性部材を介して前記筒状体の内
壁に設けた帯状の溝部に嵌合させて前記両半筒体
にて挾圧支持されていることにその溝成上の特徴
があり、これにより、筒状体の内壁全面に振動吸
収材を貼着することなくシエル音を効果的に抑制
することができ、シエル音を効果的に抑制しうる
マフラーを経済的有利に提供することができる。 As described above in detail, the present invention includes a cylindrical body formed by fixing two half-cylindrical bodies to each other, and a belt-shaped ring portion on the outer periphery, which is disposed inside the cylindrical body. comprising one or more support members supporting this,
In the muffler, which guides engine exhaust gas into the cylindrical body and then discharges it to the outside, at least one of the support members connects the ring portion of the support member to the cylindrical body through a flexible and compressible band-shaped elastic member. The groove structure is characterized by the fact that it fits into a band-shaped groove provided on the inner wall of the body and is supported by the two half-cylindrical bodies under pressure, and as a result, the entire inner wall of the cylindrical body absorbs vibrations. It is possible to effectively suppress shell noise without attaching any material, and it is possible to economically advantageously provide a muffler that can effectively suppress shell noise.
第１図は本発明に係るマフラーを組付けた自動
二輪車の一例を示す後部側面図、第２図は第１図
に示すマフラーの部分断面拡大平面図、第３図は
第１図に示すマフラーの部分断面拡大背面図、第
４図は第３図の−線切断面図、第５図は第３
図の部分断面拡大図、第６図は第５図の−線
切断面図である。
符号の説明、１０……筒状体、１１ａ，１１ｂ
……半筒体、１２ａ，１２ｂ……溝部、２０ａ，
２０ｂ，２０ｃ……支持部材、２１……リング
部、３０……エキゾーストパイプ、４１……第１
デイフユーザパイプ、４２……第２デイフユーザ
パイプ、４３……排出パイプ、５０……弾性部
材。
FIG. 1 is a rear side view showing an example of a motorcycle equipped with a muffler according to the present invention, FIG. 2 is an enlarged partial cross-sectional plan view of the muffler shown in FIG. 1, and FIG. 3 is a side view of the muffler shown in FIG. 1. Fig. 4 is a cross-sectional view taken along the - line in Fig. 3, and Fig. 5 is a partial cross-sectional enlarged rear view.
FIG. 6 is a partially enlarged sectional view of FIG. 5, and FIG. Explanation of symbols, 10... Cylindrical body, 11a, 11b
...Semi-cylindrical body, 12a, 12b...Groove portion, 20a,
20b, 20c... Support member, 21... Ring portion, 30... Exhaust pipe, 41... First
Diffuser pipe, 42...Second diffuser pipe, 43...Discharge pipe, 50...Elastic member.
Claims (1)
体と、外周に帯状リング部を有し前記筒状体の内
部に配設されてこれを支持する１または複数の支
持部材を備え、エンジンの排気を前記筒状体内に
導びいた後外部へ排出するようにしたマフラーに
おいて、前記支持部材の少くとも１つが、そのリ
ング部を柔軟で圧縮可能な帯状の弾性部材を介し
て前記筒状体の内壁に設けた帯状の溝部に嵌合さ
せて前記両半筒体にて挾圧支持されていることを
特徴とするマフラー。1 A cylindrical body formed by fixing two semi-cylindrical bodies to each other, and one or more support members having a band-shaped ring portion on the outer periphery and disposed inside the cylindrical body to support it. In the muffler, the muffler is configured to guide engine exhaust gas into the cylindrical body and then discharge it to the outside, wherein at least one of the support members extends the ring portion of the support member through a flexible and compressible band-shaped elastic member. A muffler characterized in that the muffler is fitted into a band-shaped groove provided on an inner wall of the cylindrical body and supported by the two half-cylindrical bodies under pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14381678A JPS5569717A (en) | 1978-11-21 | 1978-11-21 | Muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14381678A JPS5569717A (en) | 1978-11-21 | 1978-11-21 | Muffler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5569717A JPS5569717A (en) | 1980-05-26 |
| JPS6158648B2 true JPS6158648B2 (en) | 1986-12-12 |
Family
ID=15347621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14381678A Granted JPS5569717A (en) | 1978-11-21 | 1978-11-21 | Muffler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5569717A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5786516A (en) * | 1980-11-18 | 1982-05-29 | Fuji Heavy Ind Ltd | Assembly of silencer |
| JP2790635B2 (en) * | 1988-08-29 | 1998-08-27 | ヤマハ発動機株式会社 | Exhaust system for motorcycle |
| JP4693695B2 (en) * | 2006-05-31 | 2011-06-01 | 本田技研工業株式会社 | Motorcycle muffler structure |
| KR101251728B1 (en) * | 2010-09-07 | 2013-04-05 | 현대자동차주식회사 | Car silencer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS561450B2 (en) * | 1973-06-02 | 1981-01-13 | ||
| JPS531469U (en) * | 1976-06-20 | 1978-01-09 |
-
1978
- 1978-11-21 JP JP14381678A patent/JPS5569717A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5569717A (en) | 1980-05-26 |
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