JP2020200780A

JP2020200780A - Valve device

Info

Publication number: JP2020200780A
Application number: JP2019106839A
Authority: JP
Inventors: 伊藤　正雄; Masao Ito; 正雄伊藤; 鳥本邦博; Kunihiro Torimoto; 孝志江崎; Takashi Ezaki
Original assignee: Sango Co Ltd
Current assignee: Sango Co Ltd
Priority date: 2019-06-07
Filing date: 2019-06-07
Publication date: 2020-12-17

Abstract

To propose a valve device that can suppress occurrence of chattering and has high durability performance.SOLUTION: A valve device has a housing 2 provided with an opening 3, and a valve element 5 that is rotated about the axis of a rotating shaft 4 provided in the housing 2 to open and close the opening 3. The valve element 5 is provided fixedly on the rotating shaft 4, and the rotating shaft 4 is provided with an urging portion 7 for urging the valve element 5 in the closing direction. A resistance applying portion 14 is provided by elastic members 11, 11 provided on the outer side in the radial direction of the rotating shaft 4 to apply resistance force when the rotating shaft 4 is rotated, in which the resistance force changes with the rotation of the rotating shaft 4. The resistance force by the resistance applying portion 14 is set such that the resistance force becomes largest until the valve element 5 starts to open in the opening operation of the valve element.SELECTED DRAWING: Figure 1

Description

本発明は、バルブ装置に関する。 The present invention relates to a valve device.

内燃機関を有する自動車などの車両には、内燃機関より排出された排気ガスを外部へ導出する排気管が設けられ、この排気管には排気騒音を低減する消音器が設けられている。 Vehicles such as automobiles having an internal combustion engine are provided with an exhaust pipe that guides the exhaust gas discharged from the internal combustion engine to the outside, and the exhaust pipe is provided with a silencer that reduces exhaust noise.

この消音器には、内燃機関の低速回転域では消音性能が、高速回転域では出力向上が求められ、これらの要件を満たすために、回転数に応じて排気ガスの流路を開閉するバルブ装置が設けられている。 This silencer is required to have muffling performance in the low speed range of the internal combustion engine and improved output in the high speed range. To meet these requirements, a valve device that opens and closes the exhaust gas flow path according to the rotation speed. Is provided.

従来、このバルブ装置の弁軸の端部に、弁軸の軸方向において段差を有する段差部を形成し、弁軸方向で、かつ、段差部側に突出する突起を設け、弁軸の回動により段差部と突起との隙間を変化させ、弁体の開閉前後の摩擦力を変化させることにより、チャタリングが発生することを抑制するものが提案されている（特許文献１，２参照）。 Conventionally, a stepped portion having a step in the axial direction of the valve shaft is formed at the end of the valve shaft of this valve device, and a protrusion protruding in the valve shaft direction and toward the stepped portion is provided to rotate the valve shaft. It has been proposed to suppress the occurrence of chattering by changing the gap between the stepped portion and the protrusion and changing the frictional force before and after opening and closing the valve body (see Patent Documents 1 and 2).

特開２０１２−３６８８７号公報Japanese Unexamined Patent Publication No. 2012-36887 特許第４６７０８１９号公報Japanese Patent No. 4670819

上記特許文献１，２に記載のバルブ装置においては、剛体の突起のみで段差部からの摩擦力を受けるため、突起に係る力が大きくなり、突起が破損する虞がある。 In the valve device described in Patent Documents 1 and 2, since the frictional force from the stepped portion is received only by the rigid protrusion, the force applied to the protrusion may increase and the protrusion may be damaged.

そこで、本発明は、チャタリングの発生を抑制するとともに、上記特許文献１、２に記載のバルブ装置よりも耐久性能が高いバルブ装置を提案することを目的とするものである。 Therefore, an object of the present invention is to propose a valve device that suppresses the occurrence of chattering and has higher durability than the valve devices described in Patent Documents 1 and 2.

前記の課題を解決するために、本発明は、開口部を設けたハウジングと、該ハウジングに設けた回動軸の軸芯を中心として回動し前記開口部を開閉する弁体を有し、
前記弁体は前記回動軸に固設され、前記回動軸に前記弁体を閉方向に付勢する付勢部を設け、
前記回動軸の径方向の外側に設けた弾性部材により、前記回動軸が回動する際に抵抗力を付与するとともに、前記回動軸の回動に伴い前記抵抗力が変化する抵抗付与部を設け、
前記抵抗付与部による抵抗力は、弁体の開作動において、その開き始めるまでが最も大きくなるようにしたことを特徴とするものである。 In order to solve the above-mentioned problems, the present invention includes a housing provided with an opening and a valve body that rotates about the axis of a rotating shaft provided in the housing to open and close the opening.
The valve body is fixed to the rotation shaft, and the rotation shaft is provided with an urging portion for urging the valve body in the closing direction.
An elastic member provided on the outer side in the radial direction of the rotating shaft imparts a resistance force when the rotating shaft rotates, and also imparts a resistance whose resistance force changes with the rotation of the rotating shaft. Set up a part
The resistance force due to the resistance applying portion is characterized in that, in the opening operation of the valve body, the resistance force is maximized until the opening starts.

また、前記抵抗付与部は、前記回動軸の軸芯方向視が楕円形状のカム部材と、該カム部材の外側に、カム部材に対して対向するように設けた２枚の平板状の弾性部材を有し、
夫々の弾性部材は、平板を屈曲若しくは湾曲させて、前記回動軸の軸芯側に突出する凸部を形成し、この凸部は、前記回動軸の軸芯を中心として対向して設け、
前記カム部材を、前記回動軸に固設し、
前記カム部材と前記弾性部材が当接していない状態における前記凸部間の距離は、前記カム部材における回動軸の軸芯と直交する断面の長軸より短く、その短軸より長くしてもよい。 Further, the resistance-imparting portion includes a cam member having an elliptical axis direction of the rotating shaft, and two flat plate-shaped elastics provided on the outside of the cam member so as to face the cam member. Has a member,
Each elastic member bends or bends a flat plate to form a convex portion that protrudes toward the axis of the rotating shaft, and the convex portion is provided so as to face each other with the axis of the rotating shaft as the center. ,
The cam member is fixed to the rotating shaft,
The distance between the convex portion when the cam member and the elastic member are not in contact with each other is shorter than the long axis of the cross section orthogonal to the axis of the rotation axis of the cam member and longer than the short axis thereof. Good.

また、前記弁体が閉じた状態において、カム部材の長軸方向の頂点は、前記凸部に対して、前記回動軸の開動作における回動方向と反対側に位置するようにしてもよい。 Further, when the valve body is closed, the apex of the cam member in the long axis direction may be located on the side opposite to the rotation direction in the opening operation of the rotation shaft with respect to the convex portion. ..

本発明のバルブ装置は、開口部を設けたハウジングと、ハウジングに設けた回動軸の軸芯を中心として回動し開口部を開閉する弁体を有し、回動軸の径方向の外側に設けた弾性部材により、回動軸が回動する際に抵抗力を付与するとともに、回動軸の回動に伴い前記抵抗力が変化する抵抗付与部を設けたことにより、特許文献１、２に記載のバルブ装置と比較して、耐久性能を高めることができる。 The valve device of the present invention has a housing provided with an opening and a valve body that rotates around the axis of the rotating shaft provided in the housing to open and close the opening, and is outside the radial direction of the rotating shaft. A resistance force is applied when the rotation shaft rotates by the elastic member provided in the above, and a resistance applying portion whose resistance force changes with the rotation of the rotation shaft is provided. Durability can be improved as compared with the valve device described in 2.

また、抵抗付与部による抵抗力は、弁体の開作動において、その開き始めるまでが最も大きくなるようにしたことにより、チャタリングの発生を抑制できる。 Further, the resistance force by the resistance imparting portion is set to be the largest in the opening operation of the valve body until the opening starts, so that the occurrence of chattering can be suppressed.

本発明の実施例に係るバルブ装置における弁体を閉じた状態の斜視図。FIG. 3 is a perspective view of a valve device according to an embodiment of the present invention in a closed state. 図１の裏側から見た斜視図。A perspective view seen from the back side of FIG. 図１の正面図。Front view of FIG. 図１の裏面図。The back view of FIG. 図１の左側面図Left side view of FIG. 図５の状態から弁体を半開にした状態の左側面図。The left side view of the state where the valve body is half-opened from the state of FIG. 図５の状態から弁体を全開にした状態の左側面図。The left side view of the state where the valve body is fully opened from the state of FIG.

本発明を実施するための形態を図に示す実施例に基づいて説明する。 A mode for carrying out the present invention will be described with reference to the examples shown in the figure.

［実施例１］
図１は、本発明の実施例に係るバルブ装置１における弁体５を閉じた状態の斜視図、図２は、図１の裏側から見た斜視図を示す。 [Example 1]
FIG. 1 is a perspective view of the valve device 1 according to the embodiment of the present invention in a state where the valve body 5 is closed, and FIG. 2 is a perspective view seen from the back side of FIG.

バルブ装置１は、例えば、内燃機関を有する自動車などの車両において、内燃機関より排出された排気ガスを外部へ導出する排気管に設けて使用するものである
バルブ装置１は、図１〜図７に示すように、ハウジング２を有し、このハウジング２は排気管（図示しない）に組付けできるようになっている。ハウジング２には、図１，図３に示すように、排気管の軸方向に連通する開口部３が形成されている。 The valve device 1 is used, for example, in a vehicle such as an automobile having an internal combustion engine by providing the exhaust gas discharged from the internal combustion engine in an exhaust pipe that leads out to the outside. The valve device 1 is used in FIGS. As shown in the above, the housing 2 is provided, and the housing 2 can be assembled to an exhaust pipe (not shown). As shown in FIGS. 1 and 3, the housing 2 is formed with an opening 3 that communicates in the axial direction of the exhaust pipe.

ハウジング２には、回動軸４が回動可能な状態で、排気管の壁部近傍に位置するように設けられている。回動軸４には弁体５が溶接等により固設され、弁体５が回動軸４を中心として回動することにより、開口部３を開閉することができるようになっている。 The housing 2 is provided so that the rotating shaft 4 is located near the wall portion of the exhaust pipe in a rotatable state. A valve body 5 is fixed to the rotating shaft 4 by welding or the like, and the opening 3 can be opened and closed by rotating the valve body 5 around the rotating shaft 4.

回動軸４は、付勢部７により弁体５の閉方向に付勢され、本実施例では付勢部７としてコイルスプリングを用いた。 The rotating shaft 4 is urged by the urging portion 7 in the closing direction of the valve body 5, and in this embodiment, a coil spring is used as the urging portion 7.

回動軸４の軸方向の一端部（例えば図３における左端部）には、カム部材１０が固設されている。カム部材１０は、図１，図５〜図７に示すように、回動軸４の軸芯Ｘ−Ｘに直交する方向の断面が、楕円形状に形成され、軸芯Ｘ−Ｘ方向に所定の長さを有している。カム部材１０は、回動軸４の軸芯Ｘ−Ｘ方向視において、付勢部７を設けた側とは反対側から見た際に、楕円形状に形成されている。すなわち、バルブ装置１における左側面から見た際に、カム部材１０は楕円形状に形成されている。 A cam member 10 is fixedly attached to one end of the rotating shaft 4 in the axial direction (for example, the left end in FIG. 3). As shown in FIGS. 1, 5 and 7, the cam member 10 has an elliptical cross section in the direction orthogonal to the shaft core XX of the rotating shaft 4, and is predetermined in the shaft core XX direction. Has a length of. The cam member 10 is formed in an elliptical shape when viewed from the side opposite to the side where the urging portion 7 is provided in the axial view of the axis XX of the rotating shaft 4. That is, the cam member 10 is formed in an elliptical shape when viewed from the left side surface of the valve device 1.

カム部材１０における軸芯Ｘ−Ｘを中心とする径方向の外側で、かつ、回動軸４の軸芯Ｘ−Ｘを中心として対向する位置には、図５〜図７に示すように、平板状の弾性部材である板バネ１１，１１が２枚対面して設けられている。すなわち、弾性部材である板バネ１１，１１は、回動軸４の軸芯Ｘ−Ｘを中心とする径方向の外側に設けられている。板バネ１１，１１の両端部は、図示しない固定部材に固定保持されている。 As shown in FIGS. 5 to 7, the cam member 10 is located on the outer side in the radial direction centered on the shaft core XX and at a position facing the shaft core XX of the rotating shaft 4 as a center. Two leaf springs 11, 11 which are flat plate-shaped elastic members are provided facing each other. That is, the leaf springs 11 and 11, which are elastic members, are provided on the outer side in the radial direction about the axis XX of the rotating shaft 4. Both ends of the leaf springs 11 and 11 are fixedly held by a fixing member (not shown).

各板バネ１１は、バネ性を有する平板を屈曲若しくは湾曲して形成されているとともに、その中央部には回動軸４の軸芯Ｘ−Ｘ側に突出する凸部１１ａが形成されている。 Each leaf spring 11 is formed by bending or bending a flat plate having a spring property, and a convex portion 11a protruding toward the axis XX of the rotating shaft 4 is formed at the center thereof. ..

両凸部１１ａ，１１ａは、回動軸４の軸芯Ｘ−Ｘを中心として相互に対向するように設けられている。 The two convex portions 11a and 11a are provided so as to face each other with the axis XX of the rotating shaft 4 as the center.

カム部材１０と板バネ１１，１１とが相互に当接していない状態において、凸部１１ａ，１１ａ間の距離Ｌ１は、カム部材１０における回動軸４の軸芯Ｘ−Ｘと直交する断面における長軸（最も長い径方向の距離）の長さＬ２より短く、その短軸（最も短い径方向の距離）の長さＬ３より長く設定されている。 In a state where the cam member 10 and the leaf springs 11 and 11 are not in contact with each other, the distance L1 between the convex portions 11a and 11a is a cross section orthogonal to the axis XX of the rotating shaft 4 in the cam member 10. It is set shorter than the length L2 of the long axis (the longest radial distance) and longer than the length L3 of the short axis (the shortest radial distance).

弁体５が開閉作動する間において、常にカム部材１０と板バネ１１，１１は面で当接するように配置され、カム部材１０は、板バネ１１，１１により軸芯Ｘ−Ｘ側への復元力が常に付与され、弁体５が開閉する際における回動軸４の回動に対して抵抗力が付与されるようになっている。カム部材１０と板バネ１１，１１により回動軸４の回動に対して抵抗力を付与する抵抗付与部１４を構成する。 While the valve body 5 opens and closes, the cam member 10 and the leaf springs 11 and 11 are always arranged so as to be in contact with each other on the surface, and the cam member 10 is restored to the axis XX side by the leaf springs 11 and 11. A force is always applied, and a resistance force is applied to the rotation of the rotating shaft 4 when the valve body 5 opens and closes. The cam member 10 and the leaf springs 11 and 11 constitute a resistance applying portion 14 that applies a resistance force to the rotation of the rotating shaft 4.

また、弁体５の全閉状態において、図５に示すように、カム部材１０の長軸方向の頂点１０ａが、板バネ１１の凸部１１ａに対して、回動軸４の開動作における回動（矢印Ａ方向）と反対側に位置するように設けられている。 Further, in the fully closed state of the valve body 5, as shown in FIG. 5, the apex 10a in the long axis direction of the cam member 10 rotates with respect to the convex portion 11a of the leaf spring 11 in the opening operation of the rotation shaft 4. It is provided so as to be located on the opposite side of the motion (direction of arrow A).

また、回動軸４が、弁体５の全閉状態から開方向に回動すると、カム部材１０の長軸方向の頂点１０ａは、板バネ１１の凸部１１ａ方向に回動して、凸部１１ａにより回動軸４の回動が抑制されるため、回動軸４を回動するのに必要な力は大きくなる。一方、カム部材１０の長軸方向の頂点１０ａが、板バネ１１の凸部１１ａを乗り越えた後は、回動軸４を回動するのに必要な力は小さくなる。 Further, when the rotating shaft 4 rotates in the opening direction from the fully closed state of the valve body 5, the apex 10a in the long axis direction of the cam member 10 rotates in the convex portion 11a direction of the leaf spring 11 and is convex. Since the rotation of the rotation shaft 4 is suppressed by the portion 11a, the force required to rotate the rotation shaft 4 is increased. On the other hand, after the apex 10a of the cam member 10 in the long axis direction gets over the convex portion 11a of the leaf spring 11, the force required to rotate the rotation shaft 4 becomes small.

したがって、弁体５を開き始めるのに必要な力は大きく、弁体５が所定以上開いたのちは、開き始めの際より小さな力で弁体５を開くことができるようになっている。 Therefore, the force required to start opening the valve body 5 is large, and after the valve body 5 is opened more than a predetermined value, the valve body 5 can be opened with a smaller force than when the valve body 5 starts to open.

次に、バルブ装置１の弁体５の開閉について説明する。 Next, opening and closing of the valve body 5 of the valve device 1 will be described.

弁体５は、付勢部７により常に閉方向に付勢され、排気ガスの流速が低い場合には、付勢部７の付勢力により弁体５は閉じている。 The valve body 5 is always urged in the closing direction by the urging portion 7, and when the flow velocity of the exhaust gas is low, the valve body 5 is closed by the urging force of the urging portion 7.

排気ガスの流速が速くなり、排気ガスによる弁体の開方向への力が、付勢部７の付勢力及び板バネ１１，１１による回動軸４の回動に対する抵抗力に抗すると、弁体５は開き始める。 When the flow velocity of the exhaust gas becomes faster and the force of the exhaust gas in the opening direction of the valve body resists the urging force of the urging portion 7 and the resistance force of the leaf springs 11 and 11 to the rotation of the rotating shaft 4, the valve Body 5 begins to open.

弁体５の閉状態から開き始める際には、回動軸４が、付勢部７の付勢力と板バネ１１による抵抗力に抗して、図６に示すように、板バネ１１の凸部１１ａをカム部材１０により外側方向に押しながら回動するため、弁体５の開動作において、閉状態から開き始めるまでに必要な力が、最も大きくなる。これにより、弁体５のチャタリングが生じることを抑制できる。 When the valve body 5 starts to open from the closed state, the rotating shaft 4 opposes the urging force of the urging portion 7 and the resistance force of the leaf spring 11, and as shown in FIG. 6, the leaf spring 11 is convex. Since the portion 11a is rotated while being pushed outward by the cam member 10, the force required from the closed state to the start of opening in the opening operation of the valve body 5 is the largest. As a result, it is possible to suppress the occurrence of chattering of the valve body 5.

そして、カム部材１０の長軸方向の頂点１０ａが、板バネ１１の凸部１１ａを乗り越えた後は、弁体５の開き始めに必要な力より小さな力で、回動軸４が回動する。 Then, after the apex 10a of the cam member 10 in the long axis direction gets over the convex portion 11a of the leaf spring 11, the rotation shaft 4 rotates with a force smaller than the force required for the valve body 5 to start opening. ..

排気ガスによる弁体の開方向への力が、付勢部７の付勢力に抗しなくなると、付勢部７の付勢力により、回動軸４は弁体５の閉方向に回動するとともに、カム部材１０の長軸方向の頂点１０ａが、板バネ１１の凸部１１ａを乗り越え、弁体５は閉じる。 When the force of the exhaust gas in the opening direction of the valve body does not resist the urging force of the urging portion 7, the urging force of the urging portion 7 causes the rotation shaft 4 to rotate in the closing direction of the valve body 5. At the same time, the apex 10a of the cam member 10 in the long axis direction gets over the convex portion 11a of the leaf spring 11, and the valve body 5 closes.

上記のように、カム部材１０と板バネ１１，１１は面で相互に当接するとともに、板バネ１１，１１は弾性体であるため、特許文献１、２に記載のバルブ装置と比較して破損する虞を低減できる。また、弾性体である板バネ１１，１１により回動軸４の回動に対して抵抗を付与することで、非弾性体により抵抗を付与するものと比較して、開閉動作が滑らかとなり、よりチャタリングの発生を抑制できる。 As described above, the cam member 10 and the leaf springs 11 and 11 are in contact with each other on the surface, and the leaf springs 11 and 11 are elastic bodies, so that they are damaged as compared with the valve devices described in Patent Documents 1 and 2. The risk of this can be reduced. Further, by applying resistance to the rotation of the rotating shaft 4 by the leaf springs 11 and 11 which are elastic bodies, the opening and closing operation becomes smoother as compared with the case where resistance is applied by the inelastic body. The occurrence of chattering can be suppressed.

１バルブ装置１
２ハウジング
３開口部
４回動軸
５弁体
７付勢部
１０カム部材
１１板バネ（弾性部材）
１１ａ凸部
１４抵抗付与部 1 Valve device 1
2 Housing 3 Opening 4 Rotating shaft 5 Valve body 7 Biasing part 10 Cam member 11 Leaf spring (elastic member)
11a Convex part 14 Resistance imparting part

Claims

It has a housing provided with an opening and a valve body that rotates around the axis of a rotating shaft provided in the housing to open and close the opening.
The valve body is fixed to the rotation shaft, and the rotation shaft is provided with an urging portion for urging the valve body in the closing direction.
An elastic member provided on the outer side in the radial direction of the rotating shaft imparts a resistance force when the rotating shaft rotates, and also imparts a resistance whose resistance force changes with the rotation of the rotating shaft. Set up a part
A valve device characterized in that the resistance force of the resistance applying portion is maximized in the opening operation of the valve body until the opening starts.

The resistance-imparting portion includes a cam member having an elliptical axis direction of the rotating shaft, and two flat plate-shaped elastic members provided on the outside of the cam member so as to face the cam member. Have and
Each elastic member bends or bends a flat plate to form a convex portion that protrudes toward the axis of the rotating shaft, and the convex portion is provided so as to face each other with the axis of the rotating shaft as the center. ,
The cam member is fixed to the rotating shaft,
The distance between the convex portion in a state where the cam member and the elastic member are not in contact with each other is shorter than the long axis of the cross section orthogonal to the axis of the rotation axis of the cam member and longer than the short axis thereof. The valve device according to claim 1.

When the valve body is closed, the apex of the cam member in the long axis direction is positioned on the side opposite to the rotation direction in the opening operation of the rotation shaft with respect to the convex portion. 2. The valve device according to claim 2.