JPH0655915U - Negative pressure introduction device of negative pressure booster - Google Patents
Negative pressure introduction device of negative pressure boosterInfo
- Publication number
- JPH0655915U JPH0655915U JP82893U JP82893U JPH0655915U JP H0655915 U JPH0655915 U JP H0655915U JP 82893 U JP82893 U JP 82893U JP 82893 U JP82893 U JP 82893U JP H0655915 U JPH0655915 U JP H0655915U
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- Japan
- Prior art keywords
- negative pressure
- valve
- coil
- spring
- valve spring
- 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.)
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- Valves And Accessory Devices For Braking Systems (AREA)
- Check Valves (AREA)
Abstract
(57)【要約】
【目的】 エンジンの吸気負圧を負圧ブースタに導く負
圧導管に逆止弁を介装して、負圧ブースタの導入負圧を
保持し得るようにした負圧導入装置において、逆止弁の
弁ばねが吸気負圧の脈動に共振することを防止する。
【構成】 弁ばね１２を円錐コイルに形成し、その大径
側半部１２L のコイルピッチＰL を大きく小径側半部１
２S のコイルピッチＰS を小さく設定する。
(57) [Abstract] [Purpose] Negative pressure introduction by which a negative pressure booster can be maintained by interposing a check valve in the negative pressure conduit that guides the intake negative pressure of the engine to the negative pressure booster. In the device, the valve spring of the check valve is prevented from resonating with the pulsation of the intake negative pressure. [Constitution] The valve spring 12 is formed in a conical coil, and the coil pitch P L of the large diameter side half portion 12 L thereof is made large.
Set the coil pitch P S of 2 S to be small.
Description
【０００１】[0001]
本考案は、自動車のブレーキマスタシリンダ等を倍力作動する負圧ブースタの 負圧導入装置に関し、特に、負圧ブースタとその負圧源となるエンジンの吸気マ ニホールドとの間を接続する負圧通路に逆止弁を介装し、この逆止弁は、ハウジ ングと、このハウジングに形成された弁座と協働して吸気マニホールド側から負 圧ブースタ側への負圧の伝達時のみ開く弁体と、この弁体を閉じ方向へ付勢する コイル状の弁ばねとを備えたものゝ改良に関する。 The present invention relates to a negative pressure introducing device for a negative pressure booster that double-operates a brake master cylinder of an automobile, and more particularly to a negative pressure connecting a negative pressure booster and an intake manifold of an engine, which is the negative pressure source. A non-return valve is installed in the passage, and this non-return valve opens only when the negative pressure is transmitted from the intake manifold side to the negative pressure booster side in cooperation with the housing and the valve seat formed in this housing. The present invention relates to an improvement including a valve body and a coiled valve spring that biases the valve body in a closing direction.
【０００２】[0002]
かゝる負圧導入装置は、例えば実開昭６０−１３９９６８号公報に開示されて いるように、既に知られている。 Such a negative pressure introducing device is already known, as disclosed in, for example, Japanese Utility Model Laid-Open No. 60-139968.
【０００３】[0003]
従来の負圧導入装置では、エンジンの特定回転領域で騒音が発生することがあ る。その原因として、本考案者は、逆止弁の弁ばねが、両端の座巻き部を除いて 各部等ピッチに形成してあるため、エンジンの間欠的な吸気作用により吸気マニ ホールドに発生する負圧脈動の周波数と弁ばねの固有振動数が一致したとき、そ の弁ばねが共振して弁体を振動させ、これにより弁体が弁座を高速で繰返し叩く 音がハウジングに共鳴することを突き止めた。そして、このような弁体の振動は 閉弁不良を招くことになることは言うまでもない。 With the conventional negative pressure introducing device, noise may be generated in a specific rotation region of the engine. As a cause for this, the present inventor has found that the valve springs of the check valve are formed at equal pitches in each part except the end turn parts, so that the negative pressure generated in the intake manifold due to the intermittent intake action of the engine. When the frequency of the pressure pulsation and the natural frequency of the valve spring match, the valve spring resonates and vibrates the valve element, which causes the sound of the valve element repeatedly hitting the valve seat at high speed to resonate with the housing. I found it. Needless to say, such vibration of the valve element leads to valve closing failure.
【０００４】 本考案は、かゝる事情に鑑みてなされたもので、逆止弁の弁ばねの共振を防止 して、騒音及び閉弁不良を生じさせない前記負圧導入装置を提供することを目的 とする。The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide the negative pressure introducing device which prevents resonance of the valve spring of the check valve and prevents noise and valve closing failure. To aim.
【０００５】[0005]
上記目的を達成するために、本考案は、逆止弁の弁ばねを、両端の座巻き部を 除いてコイルピッチが部分的に異なるように形成したことを特徴とする。 In order to achieve the above object, the present invention is characterized in that a valve spring of a check valve is formed so that coil pitches are partially different except for end turn portions at both ends.
【０００６】 また本考案は、上記特徴に加えて、弁ばねを円錐コイル状に形成すると共に、 その大径側半部のコイルピッチを小径側半部のコイルピッチより小さく設定した ことを第２の特徴とする。In addition to the above features, the present invention is characterized in that the valve spring is formed in a conical coil shape, and the coil pitch of the large diameter side half portion is set smaller than the coil pitch of the small diameter side half portion. It is a feature of.
【０００７】[0007]
以下、図面により本考案の一実施例について説明する。 An embodiment of the present invention will be described below with reference to the drawings.
【０００８】 先ず図１において、Ｂは自動車のブレーキマスタシリンダ作動用の負圧ブース タを、またＭはその負圧源となるエンジンの吸気マニホールドをそれぞれ示す。 負圧ブースタＢのシェル１外面には、その内部の負圧室１ａに連なる負圧導入管 ２が突設され、また吸気マニホールドＭの外面には、その内部に連なる負圧導出 管３が突設され、それらの間を負圧通路としてのゴム製負圧導管４が接続する。First, in FIG. 1, B is a negative pressure booster for operating a brake master cylinder of an automobile, and M is an intake manifold of an engine which is a source of the negative pressure. On the outer surface of the shell 1 of the negative pressure booster B, a negative pressure introducing pipe 2 connected to the negative pressure chamber 1a therein is projected, and on the outer surface of the intake manifold M, a negative pressure derivation pipe 3 connected to the inside thereof is projected. A rubber negative pressure conduit 4 serving as a negative pressure passage is connected between them.
【０００９】 この負圧導管４内には、吸気マニホールドＭ側から負圧ブースタＢ側への一方 向のみ負圧の伝達を許容する逆止弁５が装着される。In the negative pressure conduit 4, a check valve 5 is mounted which allows negative pressure transmission from the intake manifold M side to the negative pressure booster B side only in one direction.
【００１０】 図２において、逆止弁５のハウジング６は、一端を開放した円筒状のハウジン グ本体６ａと、このハウジング本体６ａの開放端に嵌着される蓋体６ｂとから構 成され、これらは合成樹脂で成形されている。そのハウジング本体６ａの外端部 は先細り状に形成され、蓋体６ｂの外端部はハウジング本体６ａより大径に形成 される。而して、負圧導管４への逆止弁５の装着に際しては、上記ハウジング６ が、その先細り状先端部を先頭にして負圧ブースタＢ側から負圧導管４に圧入さ れ、該導管４の縮径力で所定位置に保持されると共に、特に蓋体６ｂの大径部が 該導管４内面に食込んでそれとの間のシールを確保する。In FIG. 2, a housing 6 of the check valve 5 is composed of a cylindrical housing body 6a having one end opened and a lid 6b fitted to the open end of the housing body 6a. These are molded from synthetic resin. The outer end of the housing body 6a is tapered, and the outer end of the lid 6b is formed to have a larger diameter than the housing body 6a. Thus, when the check valve 5 is mounted on the negative pressure conduit 4, the housing 6 is pressed into the negative pressure conduit 4 from the negative pressure booster B side with the tapered tip portion of the housing 6 at the leading end. It is held in place by the reducing force of 4, and in particular, the large-diameter portion of the lid body 6b digs into the inner surface of the conduit 4 to ensure a seal therebetween.
【００１１】 またハウジング本体６ａの外端壁には、案内ボス７と、これを囲むように配置 されてハウジング本体６ａの内外を連通する複数の負圧入口孔８が設けられる。 また蓋体６ｂには、その内外を連通する負圧出口孔９と、この負圧出口孔９の内 端に連なる弁座１０とが設けられ、この弁座１０と協働するホペット形の弁体１ １と、この弁体１１を弁座１０に着座させるべく付勢する弁ばね１２とが収容さ れる。弁体１１は、傘部１３ａ及びステム部１３ｂを備えた合成樹脂製の弁体主 部１３と、その傘部１３ａに付設されて弁座１０に着座し得るゴム製のシール板 １４とから構成され、ステム部１３ｂは前記案内ボス７内に遊挿される。The outer end wall of the housing body 6a is provided with a guide boss 7 and a plurality of negative pressure inlet holes 8 arranged so as to surround the guide boss 7 and communicate the inside and outside of the housing body 6a. Further, the lid 6b is provided with a negative pressure outlet hole 9 that communicates the inside and the outside thereof, and a valve seat 10 that is connected to the inner end of the negative pressure outlet hole 9, and a hoppet-type valve that cooperates with the valve seat 10. A body 11 and a valve spring 12 for urging the valve body 11 to be seated on the valve seat 10 are housed. The valve body 11 is composed of a synthetic resin valve body main portion 13 having an umbrella portion 13a and a stem portion 13b, and a rubber seal plate 14 attached to the umbrella portion 13a and seatable on the valve seat 10. The stem portion 13b is loosely inserted into the guide boss 7.
【００１２】 前記弁ばね１２は、不等ピッチの円錐コイル状に形成される。即ち、弁ばね１ ２の大径側半部１２L のピッチＰL は小さく、小径側半部１２S のピッチＰS は 大きく設定される。そして、この弁ばね１２は、その小径側端部１２S を前記傘 部１３ａ外周に形成された環状係止溝１５に係合した状態で弁体１１とハウジン グ本体６ａ内端面との間に縮設される。The valve spring 12 is formed in a conical coil shape with unequal pitch. That is, the pitch P L of the large-diameter side half 12 L of the valve spring 1 2 is small, the pitch P S of the small diameter side half 12 S is set large. The valve spring 12 is provided between the valve body 11 and the inner end surface of the housing main body 6a with the small-diameter side end portion 12 S of the valve spring 12 engaged with the annular locking groove 15 formed on the outer circumference of the umbrella portion 13a. Reduced.
【００１３】 尚、弁ばね１２の両端の座巻き部は、その軸線と直角に成形する関係から、コ イルの巻初めおよび巻終りのピッチは上記ピッチの設定から除外される。Since the end-winding portions at both ends of the valve spring 12 are formed at right angles to the axis of the valve spring 12, the winding start and winding end pitches of the coil are excluded from the above pitch setting.
【００１４】 次にこの実施例の作用について説明する。エンジンの作動に伴い吸気マニホー ルドＭ内に負圧が発生すると、その負圧は負圧導管３から逆止弁５の負圧入口孔 ８を経てハウジング６内に伝達し、弁体１１を弁ばね１２の付勢力に抗して開き 、負圧出口孔９から負圧導管４を経て負圧ブースタＢの負圧室１ａに導入される 。そして、負圧室１ａの導入負圧が吸気マニホールドＭ内の負圧と等しくなると 、弁体１１は弁ばね１２の付勢力により閉じられ、負圧ブースタＢにおいて負圧 が消費されて負圧室１ａの負圧が低下すると同様の作用により吸気マニホールド Ｍ内の負圧が負圧室１ａに補給される。Next, the operation of this embodiment will be described. When a negative pressure is generated in the intake manifold M with the operation of the engine, the negative pressure is transmitted from the negative pressure conduit 3 into the housing 6 through the negative pressure inlet hole 8 of the check valve 5, and the valve body 11 is closed. The spring 12 opens against the biasing force of the spring 12 and is introduced into the negative pressure chamber 1a of the negative pressure booster B from the negative pressure outlet hole 9 through the negative pressure conduit 4. When the negative pressure introduced into the negative pressure chamber 1a becomes equal to the negative pressure in the intake manifold M, the valve body 11 is closed by the urging force of the valve spring 12, and the negative pressure is consumed in the negative pressure booster B, so that the negative pressure chamber is closed. When the negative pressure of 1a decreases, the negative pressure in the intake manifold M is supplied to the negative pressure chamber 1a by the same action.
【００１５】 エンジンの加速操作、即ち絞弁の急開操作等により吸気マニホールドＭ内の負 圧が負圧室１ａの負圧よりも低下すると、弁体１１は、その前後の圧力差により 閉弁状態を維持するので、負圧室１ａから吸気マニホールドＭ側への負圧の逆流 を防ぐことができる。When the negative pressure in the intake manifold M becomes lower than the negative pressure in the negative pressure chamber 1a due to the acceleration operation of the engine, that is, the sudden opening operation of the throttle valve, etc., the valve body 11 is closed due to the pressure difference before and after the valve body 11. Since the state is maintained, backflow of negative pressure from the negative pressure chamber 1a to the intake manifold M side can be prevented.
【００１６】 ところで、吸気マニホールドＭ内の負圧はエンジンの間欠的な吸気作用により 脈動を生じ、この脈動が逆止弁５のハウジング６内に伝達して弁ばね１２を共振 させようとするが、本考案の実施例では、円錐コイル状の弁ばね１２の大径側半 部１２L のコイルピッチＰL を大きく、小径側半部１２S のコイルピッチＰS を 小さく設定したので、等ピッチの円錐コイル状弁ばねに比し、弁ばね１２の大径 側半部１２L の固有振動数は一段と低くなる一方、小径側半部１２S の固有振動 数は一段と高くなり、したがってその大径側また小径側の一半部が上記負圧の脈 動に共振しようとしても、他半部がその共振を抑制する。こうして弁体１１の振 動を防止することができる。By the way, the negative pressure in the intake manifold M causes pulsation due to the intermittent intake action of the engine, and this pulsation is transmitted to the inside of the housing 6 of the check valve 5 to resonate the valve spring 12. In the embodiment of the present invention, since the coil pitch P L of the large diameter side half portion 12 L of the conical coil-shaped valve spring 12 is set large and the coil pitch P S of the small diameter side half portion 12 S is set small, the equal pitch is set. comparison of the conical coiled valve spring, the natural frequency of the large-diameter side half 12 L of the valve spring 12 while further lowered, the natural frequency of the small-diameter side half 12 S is further increased, thus its diameter Even if one half of the side or the small diameter side tries to resonate with the pulsation of the negative pressure, the other half suppresses the resonance. In this way, vibration of the valve body 11 can be prevented.
【００１７】 また弁ばね１２は円錐コイル状をなしているため、弁体１１の開弁により圧縮 されても、弁ばね１２の各コイル相互の間隙は確保されるので、負圧の流通には 支障を来たさない。Further, since the valve spring 12 has a conical coil shape, even if the valve spring 11 is compressed by opening the valve, a gap between the coils of the valve spring 12 is ensured, so that the negative pressure does not flow. Doesn't hurt.
【００１８】 上記実施例においては、本考案の要旨を逸脱することなく種々の設計変更が可 能である。例えば、ハウジング６の両端に負圧入口管および負圧出口管を突設し 、これらに途中で分割した負圧導管の分割端部を接続してもよい。また弁ばねを 円筒コイル状に形成して、その両半部でコイルピッチを異らせたり、その中央部 と両端部とでコイルピッチを異らせてもよい。In the above embodiment, various design changes can be made without departing from the gist of the present invention. For example, negative pressure inlet pipes and negative pressure outlet pipes may be provided at both ends of the housing 6, and the divided end portions of the negative pressure conduits divided in the middle may be connected to these. Further, the valve spring may be formed in a cylindrical coil shape, and the coil pitch may be different between both half portions thereof, or the coil pitch may be different between the central portion and both end portions thereof.
【００１９】[0019]
以上のように本考案によれば、逆止弁の弁ばねを、両端の座巻き部を除いてコ イルピッチが部分的に異なるように形成したので、弁ばねは、両端の座巻き部を 除いて固有振動数が部分的に異なるようになり、したがって弁ばね内で各部が互 いに共振を抑制し合うことにより、吸気マニホールドからの負圧脈動の到来によ るも弁ばねの共振を防止することができ、この共振による弁体の騒音発生及び閉 弁不良を解消することができる。 As described above, according to the present invention, the valve spring of the check valve is formed so that the coil pitches are partially different except for the end turn portions at both ends. Therefore, the resonance frequency of the valve spring is prevented even when the negative pressure pulsation comes from the intake manifold by suppressing the resonance of each part in the valve spring. Therefore, it is possible to eliminate the noise generation and the valve closing failure of the valve body due to this resonance.
【００２０】 また本考案の第２の特徴によれば、弁ばねを円錐コイル状に形成すると共に、 その大径側半部のコイルピッチを小径側半部のコイルピッチより小さく設定した ので、弁ばねの大径側半部と小径側半部とで固有振動数が一層大きく相違し、両 半部の共振抑制効果を一層高めることができる。Further, according to the second feature of the present invention, the valve spring is formed in the shape of a conical coil, and the coil pitch of the large diameter side half portion is set smaller than the coil pitch of the small diameter side half portion. The natural frequencies of the large-diameter side half part and the small-diameter side half part of the spring are much different, and the resonance suppressing effect of both half parts can be further enhanced.
【図１】本考案の一実施例を示す側面図FIG. 1 is a side view showing an embodiment of the present invention.
【図２】図１の２−２線拡大断面図FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG.
Ｂ 負圧ブースタ Ｍ 吸気マニホールド ４ 負圧通路としての負圧導管 ５ 逆止弁 ６ ハウジング １０ 弁座 １１ 弁体 １２ 弁ばね １２L 大径側半部 １２S 小径側半部 ＰL 大径側のコイルピッチ ＰS 小径側のコイルピッチB Negative pressure booster M Intake manifold 4 Negative pressure conduit as negative pressure passage 5 Check valve 6 Housing 10 Valve seat 11 Valve body 12 Valve spring 12 L Large diameter side half part 12 S Small diameter side half part P L Large diameter side Coil pitch P S Coil pitch on the small diameter side
Claims (2)
エンジンの吸気マニホールド（Ｍ）との間を接続する負
圧通路（４）に逆止弁（５）を介装し、この逆止弁
（５）は、ハウジング（６）と、このハウジング（６）
に形成された弁座（１０）と協働して吸気マニホールド
（Ｍ）側から負圧ブースタ（Ｂ）側への負圧の伝達時の
み開く弁体（１１）と、この弁体（１１）を閉じ方向へ
付勢するコイル状の弁ばね（１２）とを備えた、負圧ブ
ースタの負圧導入装置において、 逆止弁（５）の弁ばね（１２）を、両端の座巻き部を除
いてコイルピッチが部分的に異なるように形成したこと
を特徴とする、負圧ブースタの負圧導入装置。1. A check valve (5) is provided in a negative pressure passage (4) connecting between a negative pressure booster (B) and an intake manifold (M) of an engine, which serves as a negative pressure source for the engine. The check valve (5) includes a housing (6) and the housing (6).
A valve body (11) that opens only when negative pressure is transmitted from the intake manifold (M) side to the negative pressure booster (B) side in cooperation with a valve seat (10) formed on the valve body (11). And a coil-shaped valve spring (12) for urging the valve in the closing direction, the valve spring (12) of the check valve (5) having a coiled valve spring (12) at both ends. A negative pressure introducing device for a negative pressure booster, characterized in that the coil pitches are partially different except for the above.
ると共に、その大径側半部（１２L ）のコイルピッチ
（ＰL ）を小径側半部（１２S ）のコイルピッチ
（ＰS ）より小さく設定したことを特徴とする、負圧ブ
ースタの負圧導入装置。With 2. A valve forms a spring (12) to form conical coil, the coil pitch (P small diameter side half of the coil pitch (P L) of the large-diameter side half (12 L) (12 S) S ) A negative pressure introducing device for a negative pressure booster characterized by being set smaller than S ).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP82893U JPH0655915U (en) | 1993-01-18 | 1993-01-18 | Negative pressure introduction device of negative pressure booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP82893U JPH0655915U (en) | 1993-01-18 | 1993-01-18 | Negative pressure introduction device of negative pressure booster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0655915U true JPH0655915U (en) | 1994-08-02 |
Family
ID=11484503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP82893U Pending JPH0655915U (en) | 1993-01-18 | 1993-01-18 | Negative pressure introduction device of negative pressure booster |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0655915U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007156566A (en) * | 2005-11-30 | 2007-06-21 | Okayama Univ | Resonance control type fluid pressure control system and fluid pressure control valve therefor |
| JP2008138732A (en) * | 2006-11-30 | 2008-06-19 | Piolax Inc | Relief valve |
| JP2013060943A (en) * | 2011-07-19 | 2013-04-04 | Nuovo Pignone Spa | Differential pressure valve with parallel biasing spring and method for reducing spring surge |
| JP2015206407A (en) * | 2014-04-21 | 2015-11-19 | 前澤給装工業株式会社 | Packing integrated type check valve |
| WO2019082948A1 (en) * | 2017-10-25 | 2019-05-02 | 株式会社アドヴィックス | Negative pressure type booster device |
-
1993
- 1993-01-18 JP JP82893U patent/JPH0655915U/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007156566A (en) * | 2005-11-30 | 2007-06-21 | Okayama Univ | Resonance control type fluid pressure control system and fluid pressure control valve therefor |
| JP4590562B2 (en) * | 2005-11-30 | 2010-12-01 | 国立大学法人 岡山大学 | Resonance control type fluid pressure control system and fluid pressure control valve for the control system |
| JP2008138732A (en) * | 2006-11-30 | 2008-06-19 | Piolax Inc | Relief valve |
| JP2013060943A (en) * | 2011-07-19 | 2013-04-04 | Nuovo Pignone Spa | Differential pressure valve with parallel biasing spring and method for reducing spring surge |
| JP2015206407A (en) * | 2014-04-21 | 2015-11-19 | 前澤給装工業株式会社 | Packing integrated type check valve |
| WO2019082948A1 (en) * | 2017-10-25 | 2019-05-02 | 株式会社アドヴィックス | Negative pressure type booster device |
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