JP2004108174A - Flexible joint for exhaust pipe - Google Patents

Flexible joint for exhaust pipe Download PDF

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Publication number
JP2004108174A
JP2004108174A JP2002268914A JP2002268914A JP2004108174A JP 2004108174 A JP2004108174 A JP 2004108174A JP 2002268914 A JP2002268914 A JP 2002268914A JP 2002268914 A JP2002268914 A JP 2002268914A JP 2004108174 A JP2004108174 A JP 2004108174A
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JP
Japan
Prior art keywords
pipe
exhaust pipe
flexible joint
spring
tube
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
Application number
JP2002268914A
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Japanese (ja)
Inventor
Makoto Wakabayashi
若林 誠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sankei Kogyo KK
Original Assignee
Sankei Kogyo KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sankei Kogyo KK filed Critical Sankei Kogyo KK
Priority to JP2002268914A priority Critical patent/JP2004108174A/en
Publication of JP2004108174A publication Critical patent/JP2004108174A/en
Pending legal-status Critical Current

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  • Exhaust Silencers (AREA)
  • Joints Allowing Movement (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible joint for an exhaust pipe capable of absorbing a sound, vibration, and exhaust gas generated by an internal combustion engine, vibration from a road surface when driving, etc., which has flexibility in any direction, has favorable seal performance, and can be manufactured at a low cost. <P>SOLUTION: This flexible joint comprises a diameter enlarged part 2 provided at the end of one pipe 1 to be connected, a spring lock 4 and a seal member 5 provided at the end of the other pipe 3 of a counter part to be connected, and a spring 6 provided between the spring lock at the end of the other pipe inserted to the end of the diameter enlarged part and the end edge of the diameter enlarged part 2. Flexibility is thus imparted in a perpendicular direction to a shaft along a prescribed circumference without deteriorating the seal performance of the other pipe 3 to be connected. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、排気管の接続部の端部と端部とをシール性を損なわずにあらゆる方向に接続可能にした排気管可撓継手に関する。
【0002】
【従来の技術】
従来、内燃機関の排気管は、内燃機関の発する音、振動、排気ガス、走行時の路面からの振動発生から乗り心地性等を改良する等の理由から、排気系の振動等を揺動変位して吸収したり、エンジンや浄化装置への接続を可能にするため、球面継手が広く用いられる。その構造例を図9に示す。この従来例は球面ジョイントと称されるものであるが、接続部の端部20と端部21に設けられた複数の球面部22,23を有するフランジ24,25間を、前記球面部22,23間にシール材26を介在させた状態でボルト27,27止めする。可撓性及び弾支を目的としてボルト頭とフランジ25との間にバネ28を介在させている。これに類した構造も多く提案されている(例えば、特許文献1,2参照)。これらは排気管中心線上にある基点を中心に一定方向にのみ曲げが可能な可撓構造を備えているにすぎない。
【0003】
また、ボルトに代えてフランジ間外周に環状の係止部材を用いた例もある(例えば、特許文献3)。一定方向にのみ曲げが可能な点は前記例と同じである。更に、あらゆる方向に曲がる断面波形のベローズの外周に筒状のブレードを被覆して該ブレードの両端部をベローズの端部外周に添わせると共に、そのブレードの両端部外周にそれぞれリング状のプロテクタを嵌合保持させた可撓継手の例がある(例えば、特許文献4参照)。これはシール性に優れているものの、使用部品が多くコスト高とならざるを得ない。
【0004】
【特許文献1】
特開2001−263057号公報(第1頁、図1)
【特許文献2】
特開平7−259552号公報(第1頁、図1)
【特許文献3】
特開2002−89259号公報(第1頁、図1)
【特許文献4】
特開平9−250339号公報(第1頁、図1)
【0005】
【発明が解決しようとする課題】
本発明は、内燃機関の発する音、振動、排気ガス、走行時の路面からの振動等を吸収し、かつ、あらゆる方向への可撓性を備え、かつ、シール性が良好、低コストで製作可能な排気管可撓継手を提供するものである。
【0006】
【課題を解決するための手段】
上記課題を検討した結果、接続する一方の管端に設けられた拡径部と、接続相手の他方の管端に設けられたバネ係止部及びシール材と、前記拡径部端部内に挿入された前記他方の管端バネ係止部と前記拡径部端縁の間に介在させたバネとからなり、接合する他方の管がシール性を損なわずに所定の全周にわたって軸直角方向に可撓性を有したことを特徴とする排気管可撓継手とした。ここにいう全方向に可撓性とは、排気管中心線上にある基点を中心にあらゆる方向に曲げ(旋回)が可能で可撓性を有した状態をいう。拡径部は管に一体加工で設けてもよいし、拡径部を管とは別体で作成し、後工程で接着又は溶着一体化してもよい。
【0007】
接続する一方の拡径部の好ましい態様は、管端が先端方向に拡径されたテーパ状の拡径部である。拡径部の先端部にはバネ係止部を設けるが、特に限定するものではないが、内方への曲げ、又は先端部に設けた縮径フランジにより管端バネ係止部を形成するとよい。バネはテーパ状に近似させるため先端方向に拡径された螺旋バネが好ましい。接続相手の他方の管がテーパ状の拡径部の先端の大径に開口された縁部に接する状態となるまで基点を中心にあらゆる方向に曲げ(旋回)が可能な(所定の全周にわたって軸直角方向に可撓性を有する)可撓継手を構成している。
【0008】
また、接続相手の他方の管端に設けられたバネ係止部も特に限定するものではないが、管端近傍に設けた環状凸部が好ましい。該環状バネ係止部の先端と一方の管端に設けられた拡径部間にシール材を介在させて排気管可撓継手とした。シール材は耐熱性樹脂、無機繊維固化物、塑性無機物質等である。
【0009】
【発明の実施の形態】
図1は本発明の実施例の排気管可撓継手の一部破断側面図、図2は同排気管可撓継手における接続相手の一方を曲げた状態で接続した場合の一部破断側面図である。本発明の排気管可撓継手は接続する一方の管1の端部に設けた拡径部2と、接続相手の他方の管3の端部に設けられたバネ係止部4及びシール材5と、前記拡径部2端部内に挿入された前記他方の管端バネ係止部4との間に介在させたバネ6とからなる。
【0010】
接続する一方の管1に設けた拡径部2は、先端方向(図面右方向)に拡径されたテーパ状である。拡径部の先端部にはバネ係止部10を設ける。これは先端部のフランジ7に取り付けた縮径フランジ8により管端バネ係止部9としている。バネ6は拡径部2の内面テーパ状に近似させるため先端方向に拡径された螺旋バネを用いている。このような構造であるから、図2にみられるように接続相手の他方の管3がテーパ状の拡径部2の先端の大径に開口された縁部に接する状態となるまで基点を中心にあらゆる方向に旋回が可能である。
【0011】
図3〜図6は拡径部2の先端部のバネ係止部を他の態様で設ける例を示すものである。図3(a)はテーパ状の拡径部2をバルジ加工した場合の断面図、図3(b)は同拡径部2の正面図である。図4は接続相手の他方の管3の端部に設けたバネ係止部4の様子を示す一部破断側面図である。図5は拡径部2の先端部を予備曲げしている様子を示す一部破断側面図である。図6は拡径部2の先端部をフランジ曲げした様子を示す一部破断側面図である。このように拡径部2の先端部に設けるバネ係止部10は内方へのフランジ曲げによっても作成できる。また、接続相手の他方の管3の端部に設けるバネ係止部4は、図4のように膨出成形することによって作成することもできるが、リング金具を管3の表面に外挿固定してもよい。
【0012】
図7は本発明の排気管可撓継手を2個用いて屈曲させた他の配管接続例の側面図である。S字に近い管の接続を可能にしている。本発明の排気管可撓継手は、図8に示すように、これを曲管に用いて接続することもできる。
【0013】
【発明の効果】
本発明は以上のような構造としたので、あらゆる方向への可撓性継手となっている。内燃機関の発する音、振動、走行時の路面からの振動等を吸収し、かつ、シール性が良好である。低コストで製作可能な排気管継手である。
【図面の簡単な説明】
【図1】本発明の実施例の排気管可撓継手の一部破断側面図である。
【図2】同排気管可撓継手における接続相手の一方を曲げた状態で接続した場合の一部破断側面図である。
【図3】(a)はテーパ状の拡径部をバルジ加工した場合の断面図、 (b)は同拡径部の正面図である。
【図4】接続相手の他方の管3の端部に設けたバネ係止部の様子を示す一部破断側面図である。
【図5】拡径部の先端部を予備曲げしている様子を示す一部破断側面図である。
【図6】拡径部の先端部をフランジ曲げした様子を示す一部破断側面図である。
【図7】本発明の排気管可撓継手を用いて屈曲させた他の配管接続例の側面図である。
【図8】本発明の排気管可撓継手を曲管に用いて接続した配管接続例の側面図である。
【図9】従来の可撓継手の例を示す一部破断側面図である。
【符号の説明】
1 接続する一方の管
2 拡径部
3 接続相手の他方の管
4 バネ係止部
5 シール材
6 バネ
7 フランジ
8 縮径フランジ
9 管端バネ係止部
10 バネ係止部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an exhaust pipe flexible joint in which the ends of the connecting portions of the exhaust pipe can be connected in any direction without impairing the sealing performance.
[0002]
[Prior art]
Conventionally, the exhaust pipe of an internal combustion engine has oscillatingly displaced the vibration and the like of the exhaust system for reasons such as improving the riding comfort due to noise, vibration, exhaust gas emitted from the internal combustion engine, and vibration from the road surface during traveling. Spherical joints are widely used to absorb and absorb or connect to engines and purifiers. FIG. 9 shows an example of the structure. This conventional example is referred to as a spherical joint, and a space between the flanges 24 and 25 having a plurality of spherical portions 22 and 23 provided at an end portion 20 and an end portion 21 of the connecting portion is provided. The bolts 27 and 27 are fixed with the sealing member 26 interposed between the bolts 23. A spring 28 is interposed between the bolt head and the flange 25 for the purpose of flexibility and elasticity. Many similar structures have been proposed (for example, see Patent Documents 1 and 2). They merely have a flexible structure that can be bent only in a certain direction around a base point on the exhaust pipe center line.
[0003]
There is also an example in which an annular locking member is used on the outer periphery between flanges instead of the bolt (for example, Patent Document 3). The point which can be bent only in a fixed direction is the same as the above example. Further, a cylindrical blade is coated on the outer circumference of the bellows having a cross-sectional waveform that bends in all directions, and both ends of the blade are attached to the outer circumference of the end of the bellows, and ring-shaped protectors are respectively provided on the outer circumferences of both ends of the blade. There is an example of a flexible joint fitted and held (for example, see Patent Document 4). Although this has an excellent sealing property, it has to use many parts and increase the cost.
[0004]
[Patent Document 1]
JP 2001-263057 A (page 1, FIG. 1)
[Patent Document 2]
JP-A-7-259552 (page 1, FIG. 1)
[Patent Document 3]
JP-A-2002-89259 (page 1, FIG. 1)
[Patent Document 4]
JP-A-9-250339 (page 1, FIG. 1)
[0005]
[Problems to be solved by the invention]
The present invention absorbs noise, vibration, exhaust gas, vibration from the road surface during traveling, etc. generated by an internal combustion engine, has flexibility in all directions, has good sealing properties, and is manufactured at low cost. A possible exhaust pipe flexible joint is provided.
[0006]
[Means for Solving the Problems]
As a result of examining the above problems, the enlarged diameter portion provided at one end of the pipe to be connected, the spring engagement portion and the seal material provided at the other end of the connected tube, and the inserted portion into the end of the enlarged diameter portion The other tube end spring engaging portion and a spring interposed between the edges of the enlarged diameter portion, and the other tube to be joined is in a direction perpendicular to the axis over a predetermined entire circumference without impairing the sealing property. An exhaust pipe flexible joint characterized by having flexibility. The term "flexible in all directions" as used herein refers to a state in which the material can be bent (turned) in all directions around a base point on the center line of the exhaust pipe and has flexibility. The enlarged diameter portion may be provided in the tube by integral processing, or the enlarged diameter portion may be formed separately from the tube, and may be bonded or welded and integrated in a later step.
[0007]
A preferred aspect of the one enlarged diameter portion to be connected is a tapered enlarged portion in which the pipe end is enlarged in the distal direction. A spring locking portion is provided at the distal end of the enlarged diameter portion, but is not particularly limited, but it is preferable to form the tube end spring locking portion by bending inward or reducing the diameter of the flange provided at the distal end. . The spring is preferably a helical spring whose diameter is increased in the tip direction to approximate a taper shape. It is possible to bend (turn) in all directions around the base point until the other pipe of the connection partner comes into contact with the large-diameter opening edge at the end of the tapered enlarged portion (over a predetermined entire circumference). (Having flexibility in the direction perpendicular to the axis).
[0008]
The spring engaging portion provided at the other end of the connection partner is not particularly limited, but an annular convex portion provided near the end of the tube is preferable. An exhaust pipe flexible joint was formed by interposing a sealant between the distal end of the annular spring locking portion and the enlarged diameter portion provided at one pipe end. The sealing material is a heat-resistant resin, a solidified inorganic fiber, a plastic inorganic substance, or the like.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a partially cutaway side view of an exhaust pipe flexible joint according to an embodiment of the present invention, and FIG. 2 is a partially cutaway side view of the exhaust pipe flexible joint when one of its connection partners is connected in a bent state. is there. The exhaust pipe flexible joint of the present invention has an enlarged diameter portion 2 provided at one end of one pipe 1 to be connected, a spring engagement portion 4 and a seal material 5 provided at an end of the other pipe 3 to be connected. And a spring 6 interposed between the other end of the tube end spring engaging portion 4 inserted into the end of the enlarged diameter portion 2.
[0010]
The enlarged diameter portion 2 provided on one of the tubes 1 to be connected has a tapered shape whose diameter is increased in the distal direction (rightward in the drawing). A spring locking portion 10 is provided at the tip of the enlarged diameter portion. This is used as a tube end spring locking portion 9 by a reduced diameter flange 8 attached to a flange 7 at the distal end. As the spring 6, a helical spring whose diameter is increased in the distal direction is used to approximate the inner surface of the enlarged diameter portion 2 to a tapered shape. Due to such a structure, as shown in FIG. 2, the center of the base point is set until the other pipe 3 of the connection partner comes into contact with the large-diameter opening edge at the tip of the tapered enlarged-diameter portion 2. It is possible to turn in any direction.
[0011]
3 to 6 show an example in which a spring locking portion at the tip end of the enlarged diameter portion 2 is provided in another mode. FIG. 3A is a cross-sectional view when the tapered enlarged portion 2 is bulged, and FIG. 3B is a front view of the enlarged portion 2. FIG. 4 is a partially broken side view showing a state of a spring locking portion 4 provided at an end of the other tube 3 to be connected. FIG. 5 is a partially broken side view showing a state in which the distal end portion of the enlarged diameter portion 2 is preliminarily bent. FIG. 6 is a partially broken side view showing a state in which the distal end portion of the enlarged diameter portion 2 is flange-bent. As described above, the spring locking portion 10 provided at the distal end of the enlarged diameter portion 2 can also be formed by bending the flange inward. The spring engaging portion 4 provided at the end of the other tube 3 to be connected can also be formed by bulging as shown in FIG. May be.
[0012]
FIG. 7 is a side view of another pipe connection example bent by using two exhaust pipe flexible joints of the present invention. It enables connection of tubes close to S-shaped. As shown in FIG. 8, the exhaust pipe flexible joint of the present invention can be connected to a bent pipe by using this.
[0013]
【The invention's effect】
Since the present invention has the above structure, it is a flexible joint in all directions. It absorbs noise and vibration generated by the internal combustion engine, vibration from the road surface during traveling, and the like, and has good sealing properties. Exhaust pipe joint that can be manufactured at low cost.
[Brief description of the drawings]
FIG. 1 is a partially broken side view of an exhaust pipe flexible joint according to an embodiment of the present invention.
FIG. 2 is a partially cutaway side view of the exhaust pipe flexible joint when connected in a state where one of the connection partners is bent.
3A is a cross-sectional view when a tapered enlarged portion is bulged, and FIG. 3B is a front view of the enlarged portion.
FIG. 4 is a partially cutaway side view showing a state of a spring locking portion provided at an end of the other tube 3 to be connected;
FIG. 5 is a partially broken side view showing a state in which a distal end portion of the enlarged diameter portion is preliminarily bent.
FIG. 6 is a partially cutaway side view showing a state in which a distal end portion of the enlarged diameter portion is bent by a flange.
FIG. 7 is a side view of another pipe connection example bent using the exhaust pipe flexible joint of the present invention.
FIG. 8 is a side view of a pipe connection example in which the exhaust pipe flexible joint of the present invention is connected to a curved pipe.
FIG. 9 is a partially cutaway side view showing an example of a conventional flexible joint.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 One pipe to connect 2 Large diameter part 3 The other pipe to connect 4 Spring locking part 5 Seal material 6 Spring 7 Flange 8 Reduced diameter flange 9 Pipe end spring locking part 10 Spring locking part

Claims (4)

接続する一方の管端に設けられた拡径部と、接続相手の他方の管端に設けられたバネ係止部及びシール材と、前記拡径部端部内に挿入された前記他方の管端バネ係止部と前記拡径部端縁の間に介在させたバネとからなり、接合する他方の管がシール性を損なわずに所定の全周にわたって軸直角方向に可撓性を有したことを特徴とする排気管可撓継手。An enlarged portion provided at one end of the pipe to be connected, a spring engaging portion and a sealing material provided at the other end of the connected tube, and the other end inserted into the end of the enlarged portion. The other tube to be joined is made of a spring interposed between the spring locking portion and the edge of the enlarged diameter portion, and has flexibility in a direction perpendicular to the axis over a predetermined entire circumference without impairing sealing performance. An exhaust pipe flexible joint characterized by the above-mentioned. 接続する一方の管端が先端方向に拡径されたテーパ状の拡径部であり、先端部に設けた縮径フランジにより管端バネ係止部を形成してなる請求項1記載の排気管可撓継手。2. The exhaust pipe according to claim 1, wherein one of the pipe ends to be connected is a tapered enlarged portion whose diameter is increased in a distal direction, and a pipe end spring engaging portion is formed by a reduced diameter flange provided at the distal end. Flexible joint. 接続する一方の管端が先端方向に拡径されたテーパ状の拡径部であり、先端部に内方への曲げにより管端バネ係止部を形成してなる請求項1記載の排気管可撓継手。2. The exhaust pipe according to claim 1, wherein one end of the pipe to be connected is a tapered enlarged portion whose diameter is increased in a distal direction, and a pipe end spring engaging portion is formed at the distal end by bending inward. Flexible joint. 接続相手の他方の管端に設けられたバネ係止部が管端近傍に設けた環状凸部であり、該バネ係止部の先端と一方の管端に設けられた拡径部との間にシール材を介在させた請求項1乃至3記載の排気管可撓継手。The spring engaging portion provided on the other end of the connection partner is an annular convex portion provided near the end of the tube, and is provided between the tip of the spring engaging portion and the enlarged portion provided on one end of the tube. 4. The flexible exhaust pipe joint according to claim 1, further comprising a sealing material interposed therebetween.
JP2002268914A 2002-09-13 2002-09-13 Flexible joint for exhaust pipe Pending JP2004108174A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002268914A JP2004108174A (en) 2002-09-13 2002-09-13 Flexible joint for exhaust pipe

Publications (1)

Publication Number Publication Date
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012083205A (en) * 2010-10-12 2012-04-26 Honda Motor Co Ltd Attachment for collecting exhaust gas and detachment method for the same
WO2015129037A1 (en) * 2014-02-28 2015-09-03 三菱重工業株式会社 Sheet metal turbine housing
JP2015167888A (en) * 2014-03-05 2015-09-28 株式会社カワタ Processing device for granular powder

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012083205A (en) * 2010-10-12 2012-04-26 Honda Motor Co Ltd Attachment for collecting exhaust gas and detachment method for the same
WO2015129037A1 (en) * 2014-02-28 2015-09-03 三菱重工業株式会社 Sheet metal turbine housing
CN105940203A (en) * 2014-02-28 2016-09-14 三菱重工业株式会社 Sheet metal turbine housing
JPWO2015129037A1 (en) * 2014-02-28 2017-03-30 三菱重工業株式会社 Sheet metal turbine housing
EP3112633A4 (en) * 2014-02-28 2017-12-13 Mitsubishi Heavy Industries, Ltd. Sheet metal turbine housing
CN105940203B (en) * 2014-02-28 2019-08-06 三菱重工发动机和增压器株式会社 Metal plate turbine shroud
US10400617B2 (en) 2014-02-28 2019-09-03 Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. Sheet-metal turbine housing
JP2015167888A (en) * 2014-03-05 2015-09-28 株式会社カワタ Processing device for granular powder

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