JPS6315540Y2 - - Google Patents
Info
- Publication number
- JPS6315540Y2 JPS6315540Y2 JP6646783U JP6646783U JPS6315540Y2 JP S6315540 Y2 JPS6315540 Y2 JP S6315540Y2 JP 6646783 U JP6646783 U JP 6646783U JP 6646783 U JP6646783 U JP 6646783U JP S6315540 Y2 JPS6315540 Y2 JP S6315540Y2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust pipe
- mounting hole
- diameter portion
- mounting holes
- exhaust
- 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
- 230000007423 decrease Effects 0.000 claims 1
- 238000007796 conventional method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Description
【考案の詳細な説明】 本考案は、自動車の排気管の改良に関する。[Detailed explanation of the idea] The present invention relates to improvement of an automobile exhaust pipe.
自動車の排気管は、第１図に示されるように、
マフラ１に溶接されている第１の排気管２と、図
示しないエンジンに取付けられる第２の排気管３
とから成り、これらの排気管は、第１の排気管２
に第２の排気管３を挿入して、第２図に示される
ように、Ｕボルト４とクランプ６とナツト５によ
つて固定されている。この場合、ナツト５の締付
けトルクが弱いと排気ガス漏れが生ずる虞れがあ
るため、ナツト５は、若干きつく締付けられる。
従つて、しばしば、第１と第２の排気管２，３
は、第３図に示されるように、その全周にわたつ
て、内向きに塑性変形を起こすため、マフラ１の
交換の際、これらの排気管を分離することが困難
となることがあつた。従来、このような不具合を
解決するための技術は提案されていない。 As shown in Figure 1, the exhaust pipe of a car is
A first exhaust pipe 2 welded to the muffler 1 and a second exhaust pipe 3 attached to the engine (not shown)
and these exhaust pipes are the first exhaust pipe 2
A second exhaust pipe 3 is inserted into the exhaust pipe 3, and is fixed with a U-bolt 4, a clamp 6, and a nut 5, as shown in FIG. In this case, if the tightening torque of the nut 5 is weak, there is a risk of exhaust gas leakage, so the nut 5 is tightened slightly more tightly.
Therefore, often the first and second exhaust pipes 2, 3
As shown in Figure 3, the exhaust pipes undergo plastic deformation inward over their entire circumference, which sometimes makes it difficult to separate these exhaust pipes when replacing the muffler 1. . Conventionally, no technology has been proposed to solve such problems.
本考案の目的は、二つの排気管を連結してなる
自動車の排気管において、該排気管の連結の際生
じる塑性変形を局部的に限定することにより、将
来のマフラ交換等の際における二つの排気管の分
離を容易にすることにある。 The purpose of the present invention is to locally limit the plastic deformation that occurs when two exhaust pipes are connected to each other in an automobile exhaust pipe. The purpose is to facilitate the separation of exhaust pipes.
この目的は、本考案によれば、第１の排気管と
第２の排気管とから成り、該第１の排気管と該第
２の排気管との内径は略等しくされ、前記第１の
排気管の先端部には所定の長さだけ大径部が設け
られており、該大径部は前記第２の排気管の外径
よりもわずかに大きい内径を有し、該大径部に前
記第２の排気管を挿入して連結される排気管であ
つて、前記大径部には、中心に対して半径方向に
対称に二つの第１の取付孔が穿設されており、同
様に、前記第１の排気管にも中心に対して半径方
向に対称に二つの第２の取付孔が穿設されてお
り、該第２の取付孔は、前記大径部に前記第２の
排気管をその先端が当接するまで挿入したとき、
その当接点から前記第１の取付孔までの長さより
もわずかに長い位置であつて、前記第１の取付孔
に整合する位置にあり、前記第１と第２の取付孔
は、内側に向かつてその直径が短くなるテーパ状
とされており、前記第１と第２の取付孔にテーパ
ボルトを挿入して、テーパナツトにより締結する
ことを特徴とする自動車の排気管によつて達成さ
れる。 This purpose, according to the present invention, consists of a first exhaust pipe and a second exhaust pipe, the first exhaust pipe and the second exhaust pipe have substantially equal inner diameters, and the first exhaust pipe and the second exhaust pipe have substantially equal inner diameters. A large diameter portion is provided at the tip of the exhaust pipe by a predetermined length, and the large diameter portion has an inner diameter slightly larger than the outer diameter of the second exhaust pipe. The exhaust pipe is connected by inserting the second exhaust pipe, and the large diameter part has two first mounting holes radially symmetrically formed with respect to the center, and the large diameter part has two first mounting holes drilled radially symmetrically with respect to the center. In addition, two second mounting holes are also formed in the first exhaust pipe symmetrically in the radial direction with respect to the center, and the second mounting holes are provided in the large diameter portion of the second mounting hole. When the exhaust pipe is inserted until its tip touches,
The position is slightly longer than the length from the contact point to the first mounting hole, and is aligned with the first mounting hole, and the first and second mounting holes are directed inward. This is achieved by an automobile exhaust pipe, which used to have a tapered shape with a decreasing diameter, and which is characterized by inserting taper bolts into the first and second mounting holes and fastening them with taper nuts.
斯かる構成の自動車の排気管については、テー
パナツトを締付けると、中心に対して半径方向に
対称な二つの位置、すなわち、第１と第２の取付
孔の位置においてのみ、内側に向かう半径方向の
力が作用し、それ以外の位置にはこのような力が
作用しない。従つて、該テーパナツトが若干きつ
く締付けられても、第１と第２の排気管は、前記
第１と第２の取付孔の位置において塑性変形を起
こすだけであり、従来（第３図）のように、全周
にわたつて塑性変形を起こすことはない。 For an automobile exhaust pipe with such a configuration, when the taper nut is tightened, the inwardly directed radial movement occurs only at two positions that are radially symmetrical about the center, namely the positions of the first and second mounting holes. A force acts on it, and no such force acts on other positions. Therefore, even if the taper nut is tightened slightly, the first and second exhaust pipes will only undergo plastic deformation at the positions of the first and second mounting holes, which is different from the conventional method (FIG. 3). As such, no plastic deformation occurs around the entire circumference.
すなわち、第１と第２の排気管が塑性変形を起
こしてもそれは局部的であるので、斯くして、本
考案によれば、従来と比較して、将来のマフラ交
換等の際における二つの排気管の分離が容易にな
るという効果を奏する。 In other words, even if the first and second exhaust pipes undergo plastic deformation, the deformation is localized, and thus, according to the present invention, compared to the conventional method, the two This has the effect that the exhaust pipes can be easily separated.
また、本考案においては、前記したように、第
１の排気管の大径部に第２の排気管をその先端が
当接するまで挿入したとき、その当接点から第２
の取付孔までの長さは、該当接点から第１の取付
孔までの長さよりわずかに長くされており、か
つ、第１と第２の取付孔はテーパ孔とされてテー
パボルトとテーパナツトとによつて締結される。
従つて、テーパナツトを締付けたとき、テーパナ
ツトの進行に伴つて、前記当接点には押圧力が加
わり、このようにして、該当接点にて、排気ガス
のシールが行われる。 In addition, in the present invention, as described above, when the second exhaust pipe is inserted into the large diameter part of the first exhaust pipe until its tip abuts, from the contact point to the second
The length to the mounting hole is slightly longer than the length from the corresponding contact to the first mounting hole, and the first and second mounting holes are tapered holes so that they can be secured by a taper bolt and a taper nut. The agreement will be concluded.
Therefore, when the taper nut is tightened, a pressing force is applied to the contact point as the taper nut advances, and in this way, exhaust gas is sealed at the contact point.
つぎに、本考案の実施例を図面を基にして詳細
に説明する。第４図は、本考案の一実施例に係る
自動車の排気管の一部縦断面図である。同図にお
いて、自動車の排気管（以下、単に排気管と略称
する。）７は、第１の排気管８と第２の排気管９
とより成る。第１の排気管８は図示しないマフラ
に溶接されており、第２の排気管９は図示しない
エンジンに取付けられている。本実施例において
は、たまたま、第１の排気管８の内径d1は第２の
排気管９の内径d2よりも小さくされているが、一
般に、これらは略等しくされておれば良い。第１
の排気管８の先端部には所定の長さだけ大径部１
０が設けられており、該大径部１０の内径d3は、
第２の排気管９の外径D2よりもわずかに大きく
されている。第５図に示されるように、大径部１
０には、中心に対して半径方向に対称に、二つの
第１の取付孔１１が穿設されている。また、第２
の排気管９には、該大径部１０に第２の排気管９
をその先端が当接するまで挿入したときにと、前
記第１の取付孔１１と整合する位置に、二つの第
２の取付孔１２が穿設されている。大径部１０と
第２の排気管９の当接点１３から第２の取付孔１
２までの長さL2は、該当接点１３から第１の取
付孔１１までの長さL1よりもわずかに長くされ
ている。ここで、Ａ−Ａ、Ｂ−Ｂは、それぞれ第
１と第２の取付孔１１，１２の中心線である。ま
た、第１と第２の取付孔１１，１２は、内側に向
かつてその直径が短くなるテーパ孔とされてい
る。第４図に示されるように、排気管７は、第１
第２の取付孔１１，１２にテーパボルト１４を挿
入して、テーパナツト１５より締結することによ
り完成する。ここで、テーパナツト１５を締付け
るとき、上記したように、L2＞L1とされている
ため、テーパナツト１５の締付量に、比例して、
前記当接点１３には徐々に押圧力が加わり、テー
パナツト１５の締付完了時点において、当接点１
３には所定の押圧力がかかつたままになる。従つ
て、該当接点１３において、排気ガスは完全にシ
ールされる。 Next, embodiments of the present invention will be described in detail based on the drawings. FIG. 4 is a partial vertical sectional view of an automobile exhaust pipe according to an embodiment of the present invention. In the figure, an automobile exhaust pipe (hereinafter simply referred to as an exhaust pipe) 7 is composed of a first exhaust pipe 8 and a second exhaust pipe 9.
It consists of The first exhaust pipe 8 is welded to a muffler (not shown), and the second exhaust pipe 9 is attached to an engine (not shown). In this embodiment, the inner diameter d 1 of the first exhaust pipe 8 happens to be smaller than the inner diameter d 2 of the second exhaust pipe 9, but in general, it is sufficient if they are made approximately equal. 1st
At the tip of the exhaust pipe 8, there is a large diameter portion 1 of a predetermined length.
0 is provided, and the inner diameter d 3 of the large diameter portion 10 is
The outer diameter D 2 of the second exhaust pipe 9 is slightly larger than that of the second exhaust pipe 9 . As shown in FIG.
0, two first mounting holes 11 are bored radially symmetrically with respect to the center. Also, the second
The exhaust pipe 9 has a second exhaust pipe 9 in the large diameter portion 10.
Two second mounting holes 12 are drilled at positions that align with the first mounting holes 11 when inserted until their tips abut. From the contact point 13 between the large diameter portion 10 and the second exhaust pipe 9 to the second mounting hole 1
The length L 2 up to 2 is slightly longer than the length L 1 from the corresponding contact 13 to the first mounting hole 11 . Here, A-A and B-B are center lines of the first and second mounting holes 11 and 12, respectively. Further, the first and second mounting holes 11 and 12 are tapered holes whose diameter becomes smaller toward the inside. As shown in FIG. 4, the exhaust pipe 7
The tapered bolts 14 are inserted into the second mounting holes 11 and 12 and fastened with the taper nuts 15 to complete the installation. Here, when tightening the taper nut 15, as mentioned above, since L 2 > L 1 , in proportion to the amount of tightening of the taper nut 15,
A pressing force is gradually applied to the contact point 13, and when the taper nut 15 is tightened, the contact point 1
3, a predetermined pressing force remains applied. Therefore, the exhaust gas is completely sealed off at the corresponding contact point 13.
斯かる構成の排気管７においては、テーパナツ
ト１５を締付けると、第１と第２の取付孔１１，
１２の位置においてのみ、内側に向かう半径方向
の力が作用し、それ以外の位置にはこのような力
は作用しない。従つて、該テーパナツト１５が若
干きつく締付けられても、第１と第２の排気管
８，９は、前記第１と第２の取付孔１１，１２の
位置において局部的に塑性変形を起こすだけであ
り、従来（第３図）のように、全周にわたつて塑
性変形を起こすことはない。 In the exhaust pipe 7 having such a configuration, when the taper nut 15 is tightened, the first and second mounting holes 11,
An inwardly directed radial force acts only at position 12, and no such force acts at other positions. Therefore, even if the taper nut 15 is tightened slightly, the first and second exhaust pipes 8 and 9 will only undergo plastic deformation locally at the positions of the first and second mounting holes 11 and 12. Therefore, unlike the conventional case (Fig. 3), plastic deformation does not occur over the entire circumference.
斯くして、本考案によれば、従来と比較して、
将来のマフラ交換等の際における第１と第２の排
気管８，９の分離が容易になるという効果を奏す
る。 Thus, according to the present invention, compared to the conventional method,
This has the effect that the first and second exhaust pipes 8 and 9 can be easily separated when replacing the muffler in the future.
第１図は、分離されている状態の従来の排気管
の斜視図、第２図は、従来の排気管の連結部の縦
断面図、第３図は、第２図の−断面図、第４
図は、本考案の一実施例に係る自動車の排気管の
一部縦断面図、第５図はテーパボルトとテーパナ
ツトによる締結がなされていない状態の第４図の
自動車の排気管の一部縦断面図である。
８……第１の排気管、９……第１の排気管、１
０……大径部、１１……第１の取付孔、１２……
第２の取付孔、１４……テーパボルト、１５……
テーパナツト。
FIG. 1 is a perspective view of a conventional exhaust pipe in a separated state, FIG. 2 is a vertical cross-sectional view of a connecting part of a conventional exhaust pipe, and FIG. 4
The figure is a partial vertical cross-sectional view of an automobile exhaust pipe according to an embodiment of the present invention, and FIG. 5 is a partial longitudinal cross-sectional view of the automobile exhaust pipe shown in FIG. It is a diagram. 8...First exhaust pipe, 9...First exhaust pipe, 1
0... Large diameter part, 11... First mounting hole, 12...
Second mounting hole, 14... Taper bolt, 15...
Taper nut.
Claims (1)
１の排気管と該第２の排気管との内径は略等しく
され、前記第１の排気管の先端部には所定の長さ
だけ大径部が設けられており、該大径部は前記第
２の排気管の外径よりもわずかに大きい内径を有
し、該大径部に前記第２の排気管を挿入して連結
される排気管であつて、前記大径部には、中心に
対して半径方向に対称に二つの第１の取付孔が穿
設されており、同様に、前記第２の排気管にも中
心に対して半径方向に対称に二つの第２の取付孔
が穿設されており、該第２の取付孔は、前記大径
部に前記第２の排気管をその先端が当接するまで
挿入したとき、その当接点から前記第１の取付孔
までの長さよりもわずかに長い位置であつて、前
記第１の取付孔に整合する位置にあり、前記第１
と第２の取付孔は、内側に向かつてその直径が短
くなるテーパ状とされており、前記第１と第２の
取付孔にテーパボルトを挿入して、テーパナツト
により締結することを特徴とする自動車の排気
管。 It consists of a first exhaust pipe and a second exhaust pipe, the inner diameters of the first exhaust pipe and the second exhaust pipe are approximately equal, and the tip of the first exhaust pipe has a predetermined length. A slightly larger diameter portion is provided, the larger diameter portion has an inner diameter slightly larger than an outer diameter of the second exhaust pipe, and the second exhaust pipe is inserted into the large diameter portion. The large-diameter portion of the exhaust pipes to be connected has two first mounting holes drilled radially symmetrically with respect to the center, and similarly, the second exhaust pipe has two first mounting holes drilled radially symmetrically with respect to the center. Two second mounting holes are drilled radially symmetrically with respect to the center, and the second exhaust pipe is inserted into the large diameter portion until the tip thereof comes into contact with the second mounting hole. , the position is slightly longer than the length from the contact point to the first mounting hole, and is aligned with the first mounting hole, and the first
and the second mounting hole has a tapered shape whose diameter decreases toward the inside, and a tapered bolt is inserted into the first and second mounting hole and fastened with a taper nut. exhaust pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6646783U JPS59172214U (en) | 1983-05-02 | 1983-05-02 | car exhaust pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6646783U JPS59172214U (en) | 1983-05-02 | 1983-05-02 | car exhaust pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59172214U JPS59172214U (en) | 1984-11-17 |
| JPS6315540Y2 true JPS6315540Y2 (en) | 1988-05-02 |
Family
ID=30196676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6646783U Granted JPS59172214U (en) | 1983-05-02 | 1983-05-02 | car exhaust pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59172214U (en) |
-
1983
- 1983-05-02 JP JP6646783U patent/JPS59172214U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59172214U (en) | 1984-11-17 |
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