JP2022082129A - Valve attaching structure - Google Patents

Valve attaching structure Download PDF

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Publication number
JP2022082129A
JP2022082129A JP2020193500A JP2020193500A JP2022082129A JP 2022082129 A JP2022082129 A JP 2022082129A JP 2020193500 A JP2020193500 A JP 2020193500A JP 2020193500 A JP2020193500 A JP 2020193500A JP 2022082129 A JP2022082129 A JP 2022082129A
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Prior art keywords
valve
mounting structure
valve seat
cushion
installation portion
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JP2020193500A
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JP7208211B2 (en
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裕介 都築
Yusuke Tsuzuki
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Futaba Industrial Co Ltd
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Futaba Industrial Co Ltd
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Priority to JP2020193500A priority Critical patent/JP7208211B2/en
Priority to DE102021130033.9A priority patent/DE102021130033B4/en
Priority to CN202111371474.3A priority patent/CN114517722B/en
Publication of JP2022082129A publication Critical patent/JP2022082129A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
    • F01N1/165—Silencing apparatus characterised by method of silencing by using movable parts for adjusting flow area
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
    • F01N1/161—Silencing apparatus characterised by method of silencing by using movable parts for adjusting resonance or dead chambers or passages to resonance or dead chambers
    • F01N1/163—Silencing apparatus characterised by method of silencing by using movable parts for adjusting resonance or dead chambers or passages to resonance or dead chambers by means of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
    • F01N1/166—Silencing apparatus characterised by method of silencing by using movable parts for changing gas flow path through the silencer or for adjusting the dimensions of a chamber or a pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2290/00—Movable parts or members in exhaust systems for other than for control purposes
    • F01N2290/08—Movable parts or members in exhaust systems for other than for control purposes with oscillating or vibrating movement
    • F01N2290/10—Movable parts or members in exhaust systems for other than for control purposes with oscillating or vibrating movement actuated by pressure of exhaust gases, e.g. exhaust pulses

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Lift Valve (AREA)
  • Check Valves (AREA)
  • Details Of Valves (AREA)

Abstract

To provide a technique for restraining abnormal noise when a valve is closed.SOLUTION: A valve attaching structure in an exhaust flow passage includes a valve, and an installation portion to which the valve is attached in the exhaust flow passage. The valve includes a valve seat, and a valve element. The valve seat is attached to the installation portion, and has an opening through which exhaust passes. The valve element can close the opening. Further, a cushion is arranged between the valve seat and the installation portion.SELECTED DRAWING: Figure 1

Description

本開示は、バルブの取り付け構造に関する。 The present disclosure relates to a valve mounting structure.

内燃機関の排気系には、弁体を用いて排気流路を切り換える切換バルブが取り付けられている。この切換バルブは、マフラの内部で開口している排気管の開口部などに取り付けて用いられる。特許文献１では、弁座における弁体と当接する部分にクッション部を配置することで、閉弁時の打音を抑制している。 The exhaust system of the internal combustion engine is equipped with a switching valve that switches the exhaust flow path using a valve body. This switching valve is used by being attached to an opening of an exhaust pipe that is open inside the muffler. In Patent Document 1, a cushion portion is arranged at a portion of the valve seat that comes into contact with the valve body to suppress tapping sound when the valve is closed.

国際公開ＷＯ２０１６／０７６３１２号International release WO2016 / 076312

弁座における弁体と当接する部分にクッション部を配置するだけでは、十分な打音の抑制が達成できない場合がある。クッション部を厚くすると打音抑制の能力が高くなるが、排気の漏れが大きくなってしまうため、厚さの増加には制限がある。 Sufficient suppression of tapping sound may not be achieved simply by arranging the cushion portion in the portion of the valve seat that comes into contact with the valve body. If the cushion portion is made thicker, the ability to suppress the tapping sound is increased, but since the exhaust leakage becomes large, there is a limit to the increase in the thickness.

本開示の目的は、バルブを閉じたときの異音の発生を抑制する技術を提案することである。 An object of the present disclosure is to propose a technique for suppressing the generation of abnormal noise when a valve is closed.

本開示の一態様は、排気流路におけるバルブの取り付け構造であって、バルブと、排気流路においてバルブが取り付けられる設置部と、を含む。バルブは、弁座と、弁体と、を備える。弁座は、設置部に取り付けられ、排気が通過する開口を有する。弁体は、開口を閉じることができる。さらに、弁座と設置部との間に配置されたクッション部を備える。 One aspect of the present disclosure is a valve mounting structure in the exhaust flow path, comprising a valve and an installation portion in which the valve is mounted in the exhaust flow path. The valve comprises a valve seat and a valve body. The valve seat is attached to the installation and has an opening through which the exhaust passes. The valve body can close the opening. Further, a cushion portion arranged between the valve seat and the installation portion is provided.

このような構成であれば、弁体が閉じたときに弁座に生じる振動が、クッション部により減衰される。また、クッション部によって、バルブで発生した振動が排気流路に伝わることが抑制される。これらの理由により、排気脈動によって発生したチャタリングによる異音の発生を低減できる。 With such a configuration, the vibration generated in the valve seat when the valve body is closed is damped by the cushion portion. In addition, the cushion portion suppresses the vibration generated by the valve from being transmitted to the exhaust flow path. For these reasons, it is possible to reduce the generation of abnormal noise due to chattering generated by exhaust pulsation.

上述したバルブの取り付け構造において、クッション部は、弁座及び設置部のそれぞれに対して固定されていてもよい。また、クッション部における弁座の固定される位置と、クッション部における設置部の固定される位置とは、異なる位置であってもよい。 In the valve mounting structure described above, the cushion portion may be fixed to each of the valve seat and the mounting portion. Further, the position where the valve seat is fixed in the cushion portion and the position where the installation portion is fixed in the cushion portion may be different.

クッション部のうち、弁座及び設置部と固定された部分は、固定により若干の柔軟性が失われるため、それ以外の部分と比較して振動を減衰する能力が比較的小さく、振動を伝え易い。しかしながら上述した構成では、クッション部における弁座が固定された部分と設置部が固定された部分とが異なる位置であるから、振動は固定された部分以外の部分を通過するため、クッション部の振動減衰能力を良好に発揮することができる。 Of the cushion part, the part fixed to the valve seat and the installation part loses some flexibility due to fixing, so the ability to attenuate vibration is relatively small compared to other parts, and it is easy to transmit vibration. .. However, in the above-described configuration, since the portion of the cushion portion where the valve seat is fixed and the portion where the installation portion is fixed are at different positions, the vibration passes through a portion other than the fixed portion, and therefore the vibration of the cushion portion. The damping capacity can be exhibited well.

上述したバルブの取り付け構造において、設置部は筒状形状であってもよい。さらに、クッション部と弁座の固定される位置と、クッション部と設置部の固定される位置とは、設置部の中心軸の長さ方向に関して異なる位置であってもよい。 In the valve mounting structure described above, the mounting portion may have a cylindrical shape. Further, the position where the cushion portion and the valve seat are fixed and the position where the cushion portion and the installation portion are fixed may be different positions with respect to the length direction of the central axis of the installation portion.

このような構成であれば、クッション部は、上述した軸方向に関する柔軟性を高く維持できるため、高い振動減衰の能力を発揮できる。その結果、バルブで生じた振動の設置部への伝達をより良好に抑制できる。 With such a configuration, the cushion portion can maintain a high degree of flexibility in the axial direction described above, and thus can exhibit a high vibration damping ability. As a result, it is possible to better suppress the transmission of the vibration generated by the valve to the installation portion.

上述したバルブの取り付け構造において、クッション部は、その一部が弁座における開口の内部に配置されており、弁体が開口を閉じたときに弁体と弁座との間に挟まれてもよい。このような構成であれば、弁体が閉じて弁座と当たるときに発生する打音を抑制できる。 In the valve mounting structure described above, the cushion portion is partially arranged inside the opening in the valve seat, and even if the cushion portion is sandwiched between the valve body and the valve seat when the valve body closes the opening. good. With such a configuration, it is possible to suppress the tapping sound generated when the valve body closes and hits the valve seat.

上述したバルブの取り付け構造において、設置部は筒状形状であってもよい。さらに、設置部、クッション部、及び弁座が、設置部の中心軸と直交する方向に重なるラップ部が形成されていてもよい。このような構成であれば、設置部の壁面がクッション部を介して弁座と当接するように配置されるため、設置部へ弁座を安定した状態で取り付けることができる。 In the valve mounting structure described above, the mounting portion may have a cylindrical shape. Further, a lap portion may be formed in which the installation portion, the cushion portion, and the valve seat overlap in a direction orthogonal to the central axis of the installation portion. With such a configuration, since the wall surface of the installation portion is arranged so as to come into contact with the valve seat via the cushion portion, the valve seat can be attached to the installation portion in a stable state.

上述したバルブの取り付け構造では、ラップ部よりも弁体から離れた位置であって、設置部とクッション部とが重なり、かつ、弁座が重ならない位置において、設置部とクッション部は固定されていてもよい。このような構成であれば、クッション部が広く配置されるため、振動減衰の効果を向上させることができる。 In the valve mounting structure described above, the installation portion and the cushion portion are fixed at a position farther from the valve body than the wrap portion, where the installation portion and the cushion portion overlap and the valve seat does not overlap. You may. With such a configuration, since the cushion portion is widely arranged, the effect of vibration damping can be improved.

また上述したバルブの取り付け構造では、クッション部は、設置部の周囲を取り囲むように配置されていてもよい。このような構成であれば、設置部の周囲全体において振動の減衰及び振動の伝達の抑制を実現できる。 Further, in the valve mounting structure described above, the cushion portion may be arranged so as to surround the periphery of the mounting portion. With such a configuration, it is possible to realize damping of vibration and suppression of transmission of vibration in the entire circumference of the installation portion.

実施形態のバルブの取り付け構造を示す斜視図である。It is a perspective view which shows the mounting structure of the valve of an embodiment. 実施形態のバルブの取り付け構造であって、設置部、クッション部、弁座、及び弁体の断面形状を示す斜視図である。FIG. 5 is a perspective view showing a cross-sectional shape of an installation portion, a cushion portion, a valve seat, and a valve body in the valve mounting structure of the embodiment. 実施形態のバルブの取り付け構造を示す断面図である。It is sectional drawing which shows the mounting structure of the valve of an embodiment. 図４Ａが実施形態のバルブの取り付け構造をマフラに適用した状態を示す斜視図であって、筒状体の一部を省略した図であり、図４Ｂが排気ガスの流れを説明するためのマフラの模式的な側面図である。FIG. 4A is a perspective view showing a state in which the valve mounting structure of the embodiment is applied to the muffler, and is a view in which a part of the cylindrical body is omitted, and FIG. 4B is a muffler for explaining the flow of exhaust gas. It is a schematic side view of. 変形例のバルブの取り付け構造を示す斜視図である。It is a perspective view which shows the mounting structure of the valve of the modification. 変形例のバルブの取り付け構造を示す斜視図である。It is a perspective view which shows the mounting structure of the valve of the modification. 変形例のバルブの取り付け構造を示す斜視図である。It is a perspective view which shows the mounting structure of the valve of the modification.

以下に本開示の実施形態を図面と共に説明する。
［１．実施形態］
［１－１．全体構成］
図１－図３に示すバルブの取り付け構造１は、排気流路３の設置部１１にバルブ５を取り付けるための取り付け構造である。バルブの取り付け構造１は、バルブ５、設置部１１、及びクッション部７を含む。 The embodiments of the present disclosure will be described below together with the drawings.
[1. Embodiment]
[1-1. overall structure]
The valve mounting structure 1 shown in FIGS. 1 to 3 is a mounting structure for mounting the valve 5 on the installation portion 11 of the exhaust flow path 3. The valve mounting structure 1 includes a valve 5, an installation portion 11, and a cushion portion 7.

排気流路３は、本実施形態においては、車両の内燃機関から排出される排気ガスを車両の外部に排出するための流路である。設置部１１は、排気流路３においてバルブ５が取り付けられる部分であり、排気流路３を構成する筒状形状の配管の先端部分である。 In the present embodiment, the exhaust flow path 3 is a flow path for discharging the exhaust gas discharged from the internal combustion engine of the vehicle to the outside of the vehicle. The installation portion 11 is a portion of the exhaust flow path 3 to which the valve 5 is attached, and is a tip portion of a cylindrical pipe constituting the exhaust flow path 3.

バルブ５は、弁座１３、弁体１５、回転軸１７、コイルバネ１９などを有する。弁座１３は、クッション部７を介して設置部１１に取り付けられ、排気が通過する開口を有する。弁体１５は回転軸１７を介して弁座１３に回転可能に連結されており、弁座１３に接近したときに上記開口を閉じる。コイルバネ１９は回転軸１７に巻きつけるように配置されており、弁体１５を弁座１３の開口を閉じる位置に向けて付勢する。 The valve 5 has a valve seat 13, a valve body 15, a rotating shaft 17, a coil spring 19, and the like. The valve seat 13 is attached to the installation portion 11 via the cushion portion 7 and has an opening through which the exhaust gas passes. The valve body 15 is rotatably connected to the valve seat 13 via a rotating shaft 17, and closes the opening when approaching the valve seat 13. The coil spring 19 is arranged so as to be wound around the rotating shaft 17, and urges the valve body 15 toward a position where the opening of the valve seat 13 is closed.

弁座１３は、差込部３１、拡径部３３、鍔部３５、及び一対の軸支持部３７を有する。差込部３１と拡径部３３は、一体に形成された筒状形状である。差込部３１は、軸方向に直径が変化しない部分である。拡径部３３は、差込部３１から離れるに連れて円錐台状に拡径する。差込部３１と拡径部３３は中心軸が一致する。この差込部３１と拡径部３３とによって、弁座１３の開口が形成される。鍔部３５は、拡径部３３における差込部３１とは逆の縁部から拡径部３３の中心軸と交差する方向に広がる板状の部材である。一対の軸支持部３７は、鍔部３５における間隔を開けた２箇所にて、鍔部３５を基準として差込部３１が存在する側とは反対に延び出す。一対の軸支持部３７は、回転軸１７を定められた位置にて支持する。 The valve seat 13 has an insertion portion 31, an enlarged diameter portion 33, a flange portion 35, and a pair of shaft support portions 37. The insertion portion 31 and the diameter expansion portion 33 have a tubular shape integrally formed. The insertion portion 31 is a portion whose diameter does not change in the axial direction. The diameter-expanding portion 33 expands in a truncated cone shape as it moves away from the insertion portion 31. The central axes of the insertion portion 31 and the diameter expansion portion 33 coincide with each other. An opening of the valve seat 13 is formed by the insertion portion 31 and the diameter expansion portion 33. The flange portion 35 is a plate-shaped member extending in a direction intersecting the central axis of the enlarged diameter portion 33 from an edge portion of the enlarged diameter portion 33 opposite to the insertion portion 31. The pair of shaft support portions 37 extend at two spaced positions in the flange portion 35, with the collar portion 35 as a reference, opposite to the side where the insertion portion 31 exists. The pair of shaft support portions 37 support the rotating shaft 17 at a predetermined position.

弁体１５は、当接部４１、底部４３、鍔部４５、及び一対の連結部４７を有する。当接部４１は、円錐台状である。当接部４１の縮径した側の縁部を塞ぐように板状の底部４３が形成されている。鍔部４５は、当接部４１における底部４３とは逆の縁部から当接部４１の中心軸と交差する方向に広がる板状の部材である。一対の連結部４７は、鍔部４５における間隔を開けた２箇所にて、鍔部４５を基準として底部４３がある側とは反対に延び出す。一対の連結部４７は、それぞれ、回転軸１７が通過する貫通孔を有している。これにより、弁体１５は回転軸１７を中心に回転可能となる。弁体１５が弁座１３の開口を閉じたときに、当接部４１は底部４３側から開口に進入し、当接部４１は拡径部３３に対向する位置となる。 The valve body 15 has a contact portion 41, a bottom portion 43, a flange portion 45, and a pair of connecting portions 47. The contact portion 41 has a truncated cone shape. A plate-shaped bottom 43 is formed so as to close the edge of the contact portion 41 on the reduced diameter side. The flange portion 45 is a plate-shaped member that extends from the edge portion of the contact portion 41 opposite to the bottom portion 43 in a direction intersecting the central axis of the contact portion 41. The pair of connecting portions 47 extend at two spaced portions in the flange portion 45, with the collar portion 45 as a reference, opposite to the side where the bottom portion 43 is located. Each of the pair of connecting portions 47 has a through hole through which the rotating shaft 17 passes. As a result, the valve body 15 can rotate about the rotation shaft 17. When the valve body 15 closes the opening of the valve seat 13, the contact portion 41 enters the opening from the bottom 43 side, and the contact portion 41 is at a position facing the enlarged diameter portion 33.

クッション部７は、弁座１３と設置部１１との間に配置される。クッション部７は、バルブ５の振動を減衰させる。クッション部７は、糸状の金属を織って、或いは織らずに絡み合わせて形成されたワイヤーメッシュである。ワイヤーメッシュは厚みを有するシート状に形成されており、弾性変形可能である。 The cushion portion 7 is arranged between the valve seat 13 and the installation portion 11. The cushion portion 7 attenuates the vibration of the valve 5. The cushion portion 7 is a wire mesh formed by weaving or not weaving a thread-like metal. The wire mesh is formed in the form of a thick sheet and is elastically deformable.

クッション部７は、一部が設置部１１の周囲を取り囲むように配置されている。またクッション部７の一部は、弁座１３における開口の内部において、差込部３１及び拡径部３３の内周面を覆うように配置されている。そのため、弁体１５が開口を閉じたときには、クッション部７は弁座１３と弁体１５との間に挟まれる。クッション部７は、全体として略筒状となる。 A part of the cushion portion 7 is arranged so as to surround the periphery of the installation portion 11. Further, a part of the cushion portion 7 is arranged inside the opening in the valve seat 13 so as to cover the inner peripheral surfaces of the insertion portion 31 and the diameter expansion portion 33. Therefore, when the valve body 15 closes the opening, the cushion portion 7 is sandwiched between the valve seat 13 and the valve body 15. The cushion portion 7 has a substantially cylindrical shape as a whole.

図３に示されるように、クッション部７は、設置部１１の周囲に位置する部分であって、かつ、弁座１３の開口の内部に位置する部分を有する。そのため、設置部１１、クッション部７、及び弁座１３によってラップ部５１が形成される。ラップ部５１は、設置部１１、クッション部７、及び弁座１３が設置部１１の中心軸Ａと直交する方向に重なっている部分である。なお中心軸Ａは、差込部３１及び拡径部３３の中心軸と一致する。 As shown in FIG. 3, the cushion portion 7 has a portion located around the installation portion 11 and a portion located inside the opening of the valve seat 13. Therefore, the wrap portion 51 is formed by the installation portion 11, the cushion portion 7, and the valve seat 13. The wrap portion 51 is a portion where the installation portion 11, the cushion portion 7, and the valve seat 13 overlap in a direction orthogonal to the central axis A of the installation portion 11. The central axis A coincides with the central axis of the insertion portion 31 and the diameter expansion portion 33.

クッション部７は、弁座１３及び設置部１１のそれぞれに対して固定されている。固定はスポット溶接により行う。クッション部７における弁座１３の固定される位置と、クッション部７における設置部１１の固定される位置とは、異なる位置である。具体的には、クッション部７と弁座１３との溶接が為された第１溶接部６１と、クッション部７と設置部１１との溶接が為された第２溶接部６３とは、設置部１１の軸方向（すなわち、中心軸Ａの長さ方向）に関して異なる位置である。第１溶接部６１は差込部３１に設けられている。第１溶接部６１はラップ部５１に設けられていてもよいし、ラップ部５１以外の位置に設けられていてもよい。第２溶接部６３は、設置部１１とクッション部７とが重なり、かつ、弁座１３が重ならない位置に設けられている。この位置は、ラップ部５１よりも弁体１５から離れた位置である。 The cushion portion 7 is fixed to each of the valve seat 13 and the installation portion 11. Fixing is done by spot welding. The fixed position of the valve seat 13 in the cushion portion 7 and the fixed position of the installation portion 11 in the cushion portion 7 are different positions. Specifically, the first welded portion 61 in which the cushion portion 7 and the valve seat 13 are welded and the second welded portion 63 in which the cushion portion 7 and the installation portion 11 are welded are the installation portions. It is a different position with respect to the axial direction of 11 (that is, the length direction of the central axis A). The first welded portion 61 is provided in the insertion portion 31. The first welded portion 61 may be provided in the lap portion 51, or may be provided at a position other than the lap portion 51. The second welded portion 63 is provided at a position where the installation portion 11 and the cushion portion 7 overlap and the valve seat 13 does not overlap. This position is farther from the valve body 15 than the lap portion 51.

以上説明した取り付け構造において、バルブ５は排気流路３の少なくとも一部を開閉する。なお、弁体１５が弁座１３に最も接近した状態が、バルブ５が閉じた状態である。コイルバネ１９に反して弁体１５が弁座１３から離れた状態が、バルブ５が開いた状態である。バルブ５が閉じた状態において、バルブ５の開口は完全に閉塞されていなくてもよい。本実施形態において、排気の一部は、ワイヤーメッシュの隙間を通過することによって、閉じた状態のバルブ５を通過することが可能である。 In the mounting structure described above, the valve 5 opens and closes at least a part of the exhaust flow path 3. The state in which the valve body 15 is closest to the valve seat 13 is the state in which the valve 5 is closed. The state in which the valve body 15 is separated from the valve seat 13 contrary to the coil spring 19 is the state in which the valve 5 is open. When the valve 5 is closed, the opening of the valve 5 does not have to be completely closed. In the present embodiment, a part of the exhaust gas can pass through the valve 5 in the closed state by passing through the gap of the wire mesh.

［１－２．取り付け構造の使用例］
バルブ５は、筒状の配管以外の対象物にも取り付けることができる。図４Ａ－４Ｂに、マフラ８１のセパレータ８９にバルブ５を取り付ける場合の例を示す。マフラ８１は、アウタシェルを構成する筒状体８３、第１閉塞部８５、及び第２閉塞部８７と、アウタシェルの内部を仕切るセパレータ８９と、インレットパイプ９１と、アウトレットパイプ９３と、を有する。セパレータ８９には筒状の設置部９５が形成されており、その設置部９５に対してバルブ５が取り付けられている。 [1-2. Usage example of mounting structure]
The valve 5 can be attached to an object other than the tubular pipe. FIG. 4A-4B shows an example in which the valve 5 is attached to the separator 89 of the muffler 81. The muffler 81 has a tubular body 83 constituting an outer shell, a first closed portion 85, a second closed portion 87, a separator 89 for partitioning the inside of the outer shell, an inlet pipe 91, and an outlet pipe 93. A cylindrical installation portion 95 is formed in the separator 89, and a valve 5 is attached to the installation portion 95.

このようなマフラ８１においては、インレットパイプ９１を介して流入した排ガスが第１室９７に入り、バルブ５の開口を通過して第２室９９に入る。排気ガスは、その後、アウトレットパイプ９３を介して排出される。 In such a muffler 81, the exhaust gas flowing in through the inlet pipe 91 enters the first chamber 97, passes through the opening of the valve 5, and enters the second chamber 99. The exhaust gas is then discharged via the outlet pipe 93.

［１－３．効果］
以上詳述した実施形態によれば、以下の効果が得られる。
（１ａ）上記取り付け構造１では、クッション部７が弁座１３と設置部１１との間に配置され、バルブ５の振動を減衰させる。そのため、弁体１５が閉じたときに弁座１３に生じる振動が、クッション部７により減衰される。また、クッション部７によって、排気流路３に振動が伝わることが抑制される。よって、排気脈動によって発生したチャタリングによる異音の発生を低減できる。 [1-3. effect]
According to the embodiment described in detail above, the following effects can be obtained.
(1a) In the mounting structure 1, the cushion portion 7 is arranged between the valve seat 13 and the mounting portion 11 to attenuate the vibration of the valve 5. Therefore, the vibration generated in the valve seat 13 when the valve body 15 is closed is damped by the cushion portion 7. Further, the cushion portion 7 suppresses the transmission of vibration to the exhaust flow path 3. Therefore, it is possible to reduce the generation of abnormal noise due to chattering generated by exhaust pulsation.

（１ｂ）取り付け構造１では、第１溶接部６１と第２溶接部６３とが異なる位置である。つまり、クッション部７は、弁座１３及び設置部１１のそれぞれに対して異なる位置で溶接により固定されている。クッション部７において、スポット溶接された箇所は振動の減衰する能力が低くなってしまう。しかしながら、第１溶接部６１と第２溶接部６３の位置が離れていることによって、溶接箇所以外の部分、すなわち振動減衰能力が高い部分を通過して振動が伝わるため、良好な振動減衰を実現できる。 (1b) In the mounting structure 1, the first welded portion 61 and the second welded portion 63 are at different positions. That is, the cushion portion 7 is fixed to the valve seat 13 and the installation portion 11 by welding at different positions. In the cushion portion 7, the spot-welded portion has a low ability to damp vibration. However, since the positions of the first welded portion 61 and the second welded portion 63 are separated from each other, the vibration is transmitted through a portion other than the welded portion, that is, a portion having a high vibration damping ability, so that good vibration damping is realized. can.

なお、第１溶接部６１と第２溶接部６３とが設置部１１の軸方向に離れているため、クッション部７は弁体１５が弁座１３に衝突したときの衝撃を吸収し易く、より良好に振動減衰を実現できる。 Since the first welded portion 61 and the second welded portion 63 are separated from each other in the axial direction of the installation portion 11, the cushion portion 7 easily absorbs the impact when the valve body 15 collides with the valve seat 13, and more. Vibration damping can be achieved satisfactorily.

（１ｃ）クッション部７は、弁体１５が弁座１３に衝突したときの衝撃を吸収する。よって、弁体１５が閉じて弁座１３と当たるときに発生する打音を、別のクッション用部品を用いることなく抑制できる。 (1c) The cushion portion 7 absorbs an impact when the valve body 15 collides with the valve seat 13. Therefore, the tapping sound generated when the valve body 15 closes and hits the valve seat 13 can be suppressed without using another cushioning component.

（１ｄ）取り付け構造１では、設置部１１、クッション部７、及び弁座１３が、ラップ部５１を形成している。そのため、設置部１１の壁面がクッション部７を介して弁座１３と当接するように配置される結果、設置部１１へ弁座１３を安定した状態で取り付けることができる。 (1d) In the mounting structure 1, the mounting portion 11, the cushion portion 7, and the valve seat 13 form the wrap portion 51. Therefore, as a result of the wall surface of the installation portion 11 being arranged so as to come into contact with the valve seat 13 via the cushion portion 7, the valve seat 13 can be attached to the installation portion 11 in a stable state.

（１ｅ）取り付け構造１では、ラップ部５１よりも弁体１５から離れた位置であって、設置部１１とクッション部７とが重なり、かつ、弁座１３が重ならない位置において、設置部１１とクッション部７は固定されている。このような構成では、クッション部７が広く配置されることによって、振動減衰の効果を向上させることができる。また、まず弁座１３とクッション部７とを溶接して第１溶接部６１を形成し、その後にクッション部７と設置部１１とを溶接して第２溶接部６３を形成するという手順で、容易にバルブ５の設置部１１への固定を実現できる。 (1e) In the mounting structure 1, the mounting portion 11 and the cushion portion 7 overlap each other and the valve seat 13 does not overlap at a position farther from the valve body 15 than the wrap portion 51. The cushion portion 7 is fixed. In such a configuration, the effect of vibration damping can be improved by arranging the cushion portion 7 widely. Further, first, the valve seat 13 and the cushion portion 7 are welded to form the first welded portion 61, and then the cushion portion 7 and the installation portion 11 are welded to form the second welded portion 63. The valve 5 can be easily fixed to the installation portion 11.

なお、取り付け構造１は、例えばラップ部５１が弁体１５から離れる方向に長く、ラップ部５１が形成される位置に第２溶接部６３が設けられる構成であってもよい。このような構成を実現するために、例えば、弁座１３における第２溶接部６３の外周側に相当する部分に第２溶接部６３のための開口を形成し、その開口を利用してクッション部７と設置部１１とを溶接してもよい。このように溶接することで、弁座１３と設置部１１との間に第２溶接部６３が位置する構成となる。 The mounting structure 1 may be configured such that, for example, the lap portion 51 is long in the direction away from the valve body 15, and the second welded portion 63 is provided at a position where the lap portion 51 is formed. In order to realize such a configuration, for example, an opening for the second welded portion 63 is formed in a portion of the valve seat 13 corresponding to the outer peripheral side of the second welded portion 63, and the opening is used to form a cushion portion. 7 and the installation portion 11 may be welded. By welding in this way, the second welded portion 63 is positioned between the valve seat 13 and the installation portion 11.

［２．その他の実施形態］
以上本開示の実施形態について説明したが、本開示は、上記実施形態に何ら限定されることはなく、本開示の技術的範囲に属する限り種々の形態をとり得ることはいうまでもない。 [2. Other embodiments]
Although the embodiments of the present disclosure have been described above, it is needless to say that the present disclosure is not limited to the above embodiments and may take various forms as long as it belongs to the technical scope of the present disclosure.

（２ａ）上記実施形態では、車両の内燃機関の排気流路３にバルブを取り付ける取り付け構造を例示した。しかしながら排気流路は、排気を通過させるための配管であれば特に限定されない。例えば、車両以外に設けられる排気流路に本開示の取り付け構造を適用してもよいし、内燃機関の排気ガス以外を排出する排気流路に本開示の取り付け構造を適用してもよい。 (2a) In the above embodiment, an attachment structure in which a valve is attached to the exhaust flow path 3 of the internal combustion engine of a vehicle is exemplified. However, the exhaust flow path is not particularly limited as long as it is a pipe for passing exhaust gas. For example, the mounting structure of the present disclosure may be applied to an exhaust flow path provided other than the vehicle, or the mounting structure of the present disclosure may be applied to an exhaust flow path for discharging exhaust gas other than the exhaust gas of an internal combustion engine.

（２ｂ）上記実施形態では、弁体１５が弁座１３の開口の外部にある回転軸１７を中心に移動することで開閉するバルブを例示した。しかしながら、本開示の取り付け構造を適用可能なバルブの構成は特に限定されない。なお、開閉時に衝突音が発生するバルブであれば、本開示の取り付け構造の消音効果を良好に活用できる。 (2b) In the above embodiment, a valve that opens and closes by moving the valve body 15 around a rotation shaft 17 outside the opening of the valve seat 13 is exemplified. However, the valve configuration to which the mounting structure of the present disclosure is applicable is not particularly limited. If the valve produces a collision noise when it is opened and closed, the muffling effect of the mounting structure of the present disclosure can be fully utilized.

（２ｃ）上記実施形態では、クッション部７としてワイヤーメッシュを例示した。しかしながら、弁座１３と弁体１５の間の振動を吸収できるものであれば、クッション部の具体的な素材、形状などは特に限定されない。例えば、弁座１３及び弁体１５よりも柔軟性が高い素材を含む部品をクッション部として用いてもよい。なお、高温の排気が排出されるシステムでバルブを用いる場合には、クッション部に耐熱性の高い素材を用いることが望ましい。 (2c) In the above embodiment, a wire mesh is exemplified as the cushion portion 7. However, the specific material and shape of the cushion portion are not particularly limited as long as they can absorb the vibration between the valve seat 13 and the valve body 15. For example, a part containing a material having higher flexibility than the valve seat 13 and the valve body 15 may be used as the cushion portion. When a valve is used in a system that emits high-temperature exhaust gas, it is desirable to use a material with high heat resistance for the cushion portion.

（２ｄ）上記実施形態では、第１溶接部６１と第２溶接部６３の位置が、設置部１１の軸方向に関して異なる構成を例示した。しかしながら、第１溶接部６１と第２溶接部６３は設置部１１の周方向の異なる位置に配置されていてもよい。もちろん、第１溶接部６１と第２溶接部６３の位置は、設置部１１の軸方向と周方向の両方とも異なっていてもよい。なお、第１溶接部６１と第２溶接部６３は同じ位置であってもよい。 (2d) In the above embodiment, the configuration in which the positions of the first welded portion 61 and the second welded portion 63 are different with respect to the axial direction of the installation portion 11 is exemplified. However, the first welded portion 61 and the second welded portion 63 may be arranged at different positions in the circumferential direction of the installation portion 11. Of course, the positions of the first welded portion 61 and the second welded portion 63 may be different in both the axial direction and the circumferential direction of the installation portion 11. The first welded portion 61 and the second welded portion 63 may be at the same position.

（２ｅ）上記実施形態では、ラップ部５１が形成される構成を例示したが、ラップ部５１が形成されていなくてもよい。また上記実施形態では、ラップ部５１よりも弁体１５から離れた位置までクッション部７が設けられる構成を例示したが、ラップ部５１よりも弁体１５から離れた位置にはクッション部７が設けられていなくてもよい。 (2e) In the above embodiment, the configuration in which the wrap portion 51 is formed is illustrated, but the wrap portion 51 may not be formed. Further, in the above embodiment, the configuration in which the cushion portion 7 is provided at a position farther from the valve body 15 than the wrap portion 51 is exemplified, but the cushion portion 7 is provided at a position farther from the valve body 15 than the wrap portion 51. It does not have to be.

（２ｆ）上記実施形態では、クッション部７が設置部１１の周囲を取り囲むように配置される構成を例示した。しかしながら、クッション部７は設置部１１の周方向の一部にのみ配置されていてもよい。言い換えると、クッション部７は筒状に形成されていなくてもよい。 (2f) In the above embodiment, the configuration in which the cushion portion 7 is arranged so as to surround the periphery of the installation portion 11 is exemplified. However, the cushion portion 7 may be arranged only in a part of the installation portion 11 in the circumferential direction. In other words, the cushion portion 7 does not have to be formed in a cylindrical shape.

（２ｇ）上記実施形態では、スポット溶接によってクッション部７と弁座１３及びクッション部７と弁体１５を固定する方法を例示した。しかしながら、スポット溶接以外の溶接により固定を行ってもよい。また、溶接以外の方法で固定を行ってもよい。 (2g) In the above embodiment, a method of fixing the cushion portion 7 and the valve seat 13 and the cushion portion 7 and the valve body 15 by spot welding is exemplified. However, fixing may be performed by welding other than spot welding. Further, fixing may be performed by a method other than welding.

（２ｈ）上記実施形態では、設置部１１と弁座１３との間に挟まれるクッション部７が弁座１３の内面に配置され、弁座１３と弁体１５との衝突音を抑制する構成を例示した。しかしながら、弁座１３と弁体１５の衝突音を抑制するためのクッション用部品は、クッション部７とは別個に設けられていてもよい。図５に示されるバルブの取り付け構造１０１では、設置部１１と弁座１３の間にはクッション部１０３が配置され、弁座１３における拡径部３３の内側面にはクッション用部品１０５が配置される。クッション部１０３とクッション用部品１０５は、同一の素材を含む部材であってもよいし、異なる素材によって構成される部材であってもよい。 (2h) In the above embodiment, the cushion portion 7 sandwiched between the installation portion 11 and the valve seat 13 is arranged on the inner surface of the valve seat 13 to suppress the collision noise between the valve seat 13 and the valve body 15. Illustrated. However, the cushioning component for suppressing the collision noise between the valve seat 13 and the valve body 15 may be provided separately from the cushion portion 7. In the valve mounting structure 101 shown in FIG. 5, the cushion portion 103 is arranged between the installation portion 11 and the valve seat 13, and the cushion component 105 is arranged on the inner surface of the enlarged diameter portion 33 in the valve seat 13. To. The cushion portion 103 and the cushion component 105 may be members containing the same material, or may be members made of different materials.

（２ｉ）上記実施形態では、設置部１１の周囲にクッション部７が配置され、さらにその周囲に弁座１３が配置される構成を例示した。しかしながら、設置部１１が弁座１３の外側に配置されていてもよい。図６に示されるバルブの取り付け構造２０１では、外側から、設置部１１、クッション部２０３、弁座１３の順に積層される。なお取り付け構造２０１のように、クッション部２０３が差込部３１の端部において折り返す折り返し部２０３ａを有しており、クッション部２０３が弁座１３の開口内部にまで広がるように構成されていてもよい。 (2i) In the above embodiment, the configuration in which the cushion portion 7 is arranged around the installation portion 11 and the valve seat 13 is further arranged around the cushion portion 7 is exemplified. However, the installation portion 11 may be arranged outside the valve seat 13. In the valve mounting structure 201 shown in FIG. 6, the installation portion 11, the cushion portion 203, and the valve seat 13 are laminated in this order from the outside. Even if the cushion portion 203 has a folded-back portion 203a that is folded back at the end of the insertion portion 31, and the cushion portion 203 is configured to extend to the inside of the opening of the valve seat 13, as in the mounting structure 201. good.

（２ｊ）図７に示されるバルブの取り付け構造３０１のように、設置部１１が、クッション部７を保持する保持部３０３を有していてもよい。このような構成であれば、クッション部７の破損を抑制し、設置部１１へ弁座１３を安定した状態で取り付けることができる。 (2j) As in the valve mounting structure 301 shown in FIG. 7, the installation portion 11 may have a holding portion 303 for holding the cushion portion 7. With such a configuration, damage to the cushion portion 7 can be suppressed, and the valve seat 13 can be attached to the installation portion 11 in a stable state.

（２ｋ）上記実施形態では、設置部１１が筒状形状である構成を例示した。しかしながら、設置部１１は筒状形状でなくてもよい。例えば、貫通孔が形成された平板における、貫通孔の周辺部分を設置部としてもよい。その場合には、貫通孔が、排気が通過する開口となる。 (2k) In the above embodiment, the configuration in which the installation portion 11 has a cylindrical shape is exemplified. However, the installation portion 11 does not have to have a cylindrical shape. For example, in the flat plate on which the through hole is formed, the peripheral portion of the through hole may be used as the installation portion. In that case, the through hole becomes an opening through which the exhaust gas passes.

（２ｌ）上記実施形態における１つの構成要素が有する複数の機能を、複数の構成要素によって実現したり、１つの構成要素が有する１つの機能を、複数の構成要素によって実現したりしてもよい。また、複数の構成要素が有する複数の機能を、１つの構成要素によって実現したり、複数の構成要素によって実現される１つの機能を、１つの構成要素によって実現したりしてもよい。また、上記実施形態の構成の一部を省略してもよい。また、上記実施形態の構成の少なくとも一部を、他の上記実施形態の構成に対して付加又は置換してもよい。 (2l) A plurality of functions possessed by one component in the above embodiment may be realized by a plurality of components, or one function possessed by one component may be realized by a plurality of components. .. Further, a plurality of functions possessed by the plurality of components may be realized by one component, or one function realized by the plurality of components may be realized by one component. Further, a part of the configuration of the above embodiment may be omitted. Further, at least a part of the configuration of the above embodiment may be added or replaced with the configuration of the other above embodiment.

１，１０１，２０１，３０１…バルブの取り付け構造、３…排気流路、５…バルブ、７，１０３，２０３…クッション部、１１，９５…設置部、１３…弁座、１５…弁体、１７…回転軸、１９…コイルバネ、３１…差込部、３３…拡径部、３５，４５…鍔部、３７…軸支持部、４１…当接部、４３…底部、４７…連結部、５１…ラップ部、６１…第１溶接部、６３…第２溶接部、８１…マフラ、８３…筒状体、８５…第１閉塞部、８７…第２閉塞部、８９…セパレータ、９１…インレットパイプ、９３…アウトレットパイプ、９７…第１室、９９…第２室、１０５…クッション用部品、２０３ａ…折り返し部、３０３…保持部。 1,101,201,301 ... Valve mounting structure, 3 ... Exhaust flow path, 5 ... Valve, 7,103,203 ... Cushion part, 11,95 ... Installation part, 13 ... Valve seat, 15 ... Valve body, 17 ... rotating shaft, 19 ... coil spring, 31 ... insertion part, 33 ... diameter expansion part, 35, 45 ... flange part, 37 ... shaft support part, 41 ... contact part, 43 ... bottom, 47 ... connecting part, 51 ... Wrap portion, 61 ... first welded portion, 63 ... second welded portion, 81 ... muffler, 83 ... tubular body, 85 ... first closed portion, 87 ... second closed portion, 89 ... separator, 91 ... inlet pipe, 93 ... Outlet pipe, 97 ... 1st room, 99 ... 2nd room, 105 ... Cushion parts, 203a ... Folded part, 303 ... Holding part.

Claims (7)

排気流路におけるバルブの取り付け構造であって、
バルブと、排気流路において前記バルブが取り付けられる設置部と、を含み、
前記バルブは、
前記設置部に取り付けられ、排気が通過する開口を有する弁座と、
前記開口を閉じるための弁体と、を備え、
さらに、前記弁座と前記設置部との間に配置されたクッション部を備える、バルブの取り付け構造。 It is a valve mounting structure in the exhaust flow path.
Includes a valve and an installation in the exhaust flow path to which the valve is mounted.
The valve is
A valve seat attached to the installation portion and having an opening through which exhaust gas passes,
With a valve body for closing the opening,
Further, a valve mounting structure including a cushion portion arranged between the valve seat and the installation portion. 請求項１に記載のバルブの取り付け構造であって、
前記クッション部は、前記弁座及び前記設置部のそれぞれに対して固定されており、
前記クッション部における前記弁座の固定される位置と、前記クッション部における前記設置部の固定される位置とは、異なる位置である、バルブの取り付け構造。 The valve mounting structure according to claim 1.
The cushion portion is fixed to each of the valve seat and the installation portion.
A valve mounting structure in which the position where the valve seat is fixed in the cushion portion and the position where the installation portion is fixed in the cushion portion are different positions. 請求項２に記載のバルブの取り付け構造であって、
前記設置部は筒状形状であって、
前記クッション部と前記弁座の固定される位置と、前記クッション部と前記設置部の固定される位置とは、前記設置部の中心軸の長さ方向に関して異なる位置である、バルブの取り付け構造。 The valve mounting structure according to claim 2.
The installation portion has a cylindrical shape and has a cylindrical shape.
A valve mounting structure in which the position where the cushion portion and the valve seat are fixed and the position where the cushion portion and the installation portion are fixed are different positions with respect to the length direction of the central axis of the installation portion. 請求項１から請求項３のいずれか１項に記載のバルブの取り付け構造であって、
前記クッション部は、その一部が前記弁座における前記開口の内部に配置されており、前記弁体が前記開口を閉じたときに前記弁体と前記弁座との間に挟まれる、バルブの取り付け構造。 The valve mounting structure according to any one of claims 1 to 3.
A part of the cushion portion is arranged inside the opening in the valve seat, and is sandwiched between the valve body and the valve seat when the valve body closes the opening. Mounting structure. 請求項１から請求項４のいずれか１項に記載のバルブの取り付け構造であって、
前記設置部は筒状形状であって、
前記設置部、前記クッション部、及び前記弁座が、前記設置部の中心軸と直交する方向に重なるラップ部が形成されている、バルブの取り付け構造。 The valve mounting structure according to any one of claims 1 to 4.
The installation portion has a cylindrical shape and has a cylindrical shape.
A valve mounting structure in which a lap portion is formed in which the installation portion, the cushion portion, and the valve seat overlap in a direction orthogonal to the central axis of the installation portion. 請求項５に記載のバルブの取り付け構造であって、
前記ラップ部よりも前記弁体から離れた位置であって、前記設置部と前記クッション部とが重なり、かつ、前記弁座が重ならない位置において、前記設置部と前記クッション部は固定されている、バルブの取り付け構造。 The valve mounting structure according to claim 5.
The installation portion and the cushion portion are fixed at a position farther from the valve body than the wrap portion, at a position where the installation portion and the cushion portion overlap and the valve seat does not overlap. , Valve mounting structure. 請求項５又は請求項６に記載のバルブの取り付け構造であって、
前記クッション部は、前記設置部の周囲を取り囲むように配置されている、バルブの取り付け構造。 The valve mounting structure according to claim 5 or 6.
The cushion portion is a valve mounting structure arranged so as to surround the periphery of the installation portion.
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