JPS591873Y2 - Silencer for vacuum booster - Google Patents
Silencer for vacuum boosterInfo
- Publication number
- JPS591873Y2 JPS591873Y2 JP8560479U JP8560479U JPS591873Y2 JP S591873 Y2 JPS591873 Y2 JP S591873Y2 JP 8560479 U JP8560479 U JP 8560479U JP 8560479 U JP8560479 U JP 8560479U JP S591873 Y2 JPS591873 Y2 JP S591873Y2
- Authority
- JP
- Japan
- Prior art keywords
- vacuum booster
- valve plate
- filter
- end wall
- communication port
- 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
Landscapes
- Braking Systems And Boosters (AREA)
- Sealing Devices (AREA)
Description
【考案の詳細な説明】
本考案は真空倍力装置の消音装置に関し、真空倍力装置
の作動時に生じる空気吸入音を低減させることを目的と
するもので゛ある。[Detailed Description of the Invention] The present invention relates to a silencing device for a vacuum booster, and its purpose is to reduce air intake noise generated when the vacuum booster operates.
真空倍力装置は真空−大気圧力差を利用し、車両のブレ
ーキ或いはクラッチ操作力を軽減する目的で従来から広
く利用されているが、近年、その高出力化並びに車両運
転席の静粛化に伴なって、真空倍力装置の作動時に生じ
る空記吸入音が問題となってきた。Vacuum boosters have traditionally been widely used to reduce the force required to operate brakes or clutches in vehicles by utilizing the vacuum-atmospheric pressure difference, but in recent years, with the increase in output and quieter vehicle driver seats, As a result, the dry suction noise generated when the vacuum booster is activated has become a problem.
本考案は、フィルタ内を流通する空気の流通経路を長く
しかも屈曲したものとすることにより真空吸入音の低減
を図り、しかもそのような流通経路でも充分な空気量の
供給を確保して、真空倍力装置の応答性が損なわれるこ
とがないようにした消音装置を提供するものである。The present invention aims to reduce vacuum suction noise by making the air circulation path inside the filter long and curved, and also ensures that a sufficient amount of air is supplied even in such a circulation path. To provide a muffling device that does not impair the responsiveness of a booster.
以下図示実施例について本考案を説明する。The invention will now be described with reference to the illustrated embodiments.
真空倍力装置1の基本的な構成は従来周知のものと異な
るところはなく、フロントシェル2とリヤシェル3とか
ら成る外殻体内はダイヤフラム4、パワーピストン5お
よびシール材6により2室7゜Bは区隔されている。The basic configuration of the vacuum booster 1 is the same as the conventionally known one, and inside the outer shell consisting of a front shell 2 and a rear shell 3, a diaphragm 4, a power piston 5, and a sealing material 6 form two chambers at 7°B. are separated.
真空倍力装置1の非作動時には、導入口9を介して一方
の室7内に導入された負圧は、パワーピストン5に形成
した通路10゜弁機構11を構成する弁体12と第1弁
座13との間隙、および通路14を介して他方の室B内
に導入され、この状態ではパワーピストン5は復帰ばね
15により図示位置に保持されている。When the vacuum booster 1 is not in operation, the negative pressure introduced into one chamber 7 through the inlet 9 flows through the passage 10° formed in the power piston 5, the valve body 12 constituting the valve mechanism 11, and the first The power piston 5 is introduced into the other chamber B through the gap between the valve seat 13 and the passage 14, and in this state, the power piston 5 is held at the illustrated position by the return spring 15.
図示しないブレーキペダルが踏込まれ、これに連結され
た入力軸16が左行される作動時には、上記弁体12が
第1弁座13に着座して室7,8間の連通を遮断すると
ともに、弁体12に対して第2弁座17が離座されるの
で、後に詳述するように大気通路1Bと、弁体12と第
2弁座17との間隙および上記通路14を介して室8内
に大気圧が導入され、これによってパワーピストン5お
よび゛出力軸19が前進されてその前方に設けられた図
示しないマスターシリンダに高圧の制動液圧を発生させ
る。When the brake pedal (not shown) is depressed and the input shaft 16 connected to the brake pedal is moved to the left, the valve body 12 seats on the first valve seat 13 and blocks communication between the chambers 7 and 8. Since the second valve seat 17 is separated from the valve body 12, the chamber 8 is opened through the atmospheric passage 1B, the gap between the valve body 12 and the second valve seat 17, and the passage 14, as will be described in detail later. Atmospheric pressure is introduced into the engine, thereby causing the power piston 5 and the output shaft 19 to advance, thereby generating high brake fluid pressure in a master cylinder (not shown) provided in front of the power piston 5 and the output shaft 19.
然して、本実施例では、リヤシェル3の末端と上記筒部
5aの末端との間に設けたジャバラ状の伸縮自在なブー
ツ20を利用し、このブーツ20の末端を入力軸16の
軸方向末端側に延長してフィルタ21を収納する収納部
20 aと中央部分に連通口22を開口させた末端壁部
20 bとを順次形威している。However, in this embodiment, a bellows-like telescopic boot 20 provided between the end of the rear shell 3 and the end of the cylindrical portion 5a is used, and the end of the boot 20 is connected to the end of the input shaft 16 in the axial direction. A storage section 20a extending from the top to accommodate the filter 21 and an end wall section 20b having a communication port 22 opened in the center are successively formed.
そして、上記収納部20 a内にフィルタ21を収納す
るとともに、このフィルタ21の外側には弾性体から成
る弁板23を配設している。A filter 21 is housed in the housing portion 20a, and a valve plate 23 made of an elastic body is disposed outside the filter 21.
この弁板23は入力軸16に対して摺動自在となってお
り、またその外周部は上記フィルタ21の弾性により上
記末端壁部20 bの内面に弾接されて連通口22を閉
じており、さらに弁板23およびフィルタ21の弾性は
少なくともブーツ20の収納部20 aや末端壁部20
bの弾性よりも柔いように設定しである。This valve plate 23 is slidable with respect to the input shaft 16, and its outer peripheral portion is brought into elastic contact with the inner surface of the end wall portion 20b due to the elasticity of the filter 21, thereby closing the communication port 22. Furthermore, the elasticity of the valve plate 23 and the filter 21 is limited to at least the housing portion 20a of the boot 20 and the end wall portion 20.
The elasticity is set to be softer than that of b.
したがって、真空倍力装置1の作動時に、弁機構11に
より室8が大気通路18に連通されると、その大気通路
18内圧力が低下して弁板23の内外に圧力差が発生し
、弁板23の外部の空気は弁板23の外周をフィルタ2
1側に湾曲させて弁板23と末端壁部20 bとの間隙
から矢印Aのようにフィルタ21内を流通して大気通路
1B内に流入する。Therefore, when the vacuum booster 1 is operated, when the chamber 8 is communicated with the atmospheric passage 18 by the valve mechanism 11, the pressure inside the atmospheric passage 18 decreases, and a pressure difference is generated between the inside and outside of the valve plate 23, and the valve mechanism 11 causes the chamber 8 to communicate with the atmospheric passage 18. The air outside the plate 23 passes through the outer periphery of the valve plate 23 through the filter 2.
The air flows through the filter 21 as shown by arrow A from the gap between the valve plate 23 and the end wall 20b, and flows into the atmospheric passage 1B.
この際、従来では矢印Bで示すようにフィルタを流通す
る空気はそのフィルタの最短距離を流通していたので、
特に多量の空気が要求される真空倍力装置1の作動直後
に大きな吸入音が発生していたが、本実施例における空
気の流通経路(矢印A)は、フィルタ21内で屈曲され
かつ長いものとなるので、ここを流通する空気の音エネ
ルギを良好に吸収して大きな吸入音の発生を抑制するこ
とができる。At this time, conventionally the air flowing through the filter was flowing through the filter through the shortest distance as shown by arrow B.
In particular, a loud suction noise was generated immediately after the operation of the vacuum booster 1, which requires a large amount of air, but the air flow path (arrow A) in this embodiment is bent and long within the filter 21. Therefore, it is possible to satisfactorily absorb the sound energy of the air flowing therethrough and suppress the generation of loud intake noise.
しかもその際、弁板23と末端壁部20bとの間の流路
面積は弁板23の内外に生じる圧力差によって自動的に
大小に可変であるので、空気の流入が制限されて真空倍
力装置1の応答性が悪くなるということもない。Moreover, at that time, the flow path area between the valve plate 23 and the end wall 20b is automatically changed in size depending on the pressure difference generated inside and outside the valve plate 23, so that the inflow of air is restricted and the vacuum boost is increased. The responsiveness of the device 1 will not deteriorate.
なお、点線で示すように、収納部20 aと弁板23と
のいずれか一方又は双方に孔24を穿設してもよい。Note that, as shown by the dotted line, a hole 24 may be formed in either or both of the storage portion 20a and the valve plate 23.
これらの孔24は、実質的に吸入音を生じさせることの
ない少量の空気の要求時にここから空気を供給させるこ
とができ、したがってそのような時期における弁板23
の湾曲を防止してその耐久性の向上を図ることができる
。These holes 24 allow air to be supplied therefrom when a small amount of air is required without substantially producing suction noise, and therefore the valve plate 23 at such times
It is possible to prevent bending of the material and improve its durability.
また上記実施例では収納部20 aと末端壁部20 b
とをブーツ20に一体に形成しているが、必ずしも一体
である必要はなく、また弾性体である必要もない。Further, in the above embodiment, the storage portion 20a and the end wall portion 20b
Although these are integrally formed in the boot 20, they do not necessarily have to be integral, nor do they need to be made of an elastic body.
さらに弁板23もまた、必ずしも弾性体である必要はな
い
本考案は以上の構成を有するものであるがら、真空倍力
装置の応答性を損うことなく空気吸入音の低減を図るこ
とができるという効果を得ることができる。Furthermore, the valve plate 23 does not necessarily have to be an elastic body.Although the present invention has the above configuration, it is possible to reduce air intake noise without impairing the responsiveness of the vacuum booster. This effect can be obtained.
また、フィルタの一部が長期間の使用によって目詰まり
した場合には、圧力差を受けて開かれる弁板の開度が自
動的に大きくなって大きな流路面積を確保するようにな
るので、目詰まりによる真空倍力装置の応答性の悪化を
長期にわたって防止できるという効果も得られる。In addition, if a part of the filter becomes clogged due to long-term use, the opening of the valve plate that opens in response to the pressure difference will automatically increase to ensure a large flow path area. It is also possible to prevent deterioration in the responsiveness of the vacuum booster due to clogging over a long period of time.
図は本考案の一実施例を示す縦断面図である。
1・・真空倍力装置、2,3・・シェル、5・・パワー
ピストン、5a・・筒部、1B・・大気通路、20・・
ブーツ、20 a・・収納部、20 b・・末端壁部、
21・・フィルタ、22・・連通口、23・・弁板。The figure is a longitudinal sectional view showing an embodiment of the present invention. 1...Vacuum booster, 2,3...Shell, 5...Power piston, 5a...Cylinder part, 1B...Atmospheric passage, 20...
Boots, 20a...storage section, 20b...end wall section,
21...Filter, 22...Communication port, 23...Valve plate.
Claims (1)
ーツを装着し、かつ上記筒部内を大気通路とした真空倍
力装置において、上記ブーツの末端部分にフィルタを収
納する収納部と中央部分に連通口を開口させた末端壁部
とを順次連設するとともに、上記大気通路を上記収納部
内に収納したフィルタ及び上記連通口を介して大気に連
通させ、かつ、上記フィルタの外側に弁板を配設してそ
の外周部を上記連通口が開口された末端壁部の内面に弾
接させ、真空倍力装置の作動により弁板の内外に圧力差
が生じた際にはその圧力差により弁板の外周部を上記末
端壁部の内面から離隔させることを特徴とする真空倍力
装置の消音装置。In a vacuum booster, a retractable boot is installed between the shell and the cylinder of the power piston, and the inside of the cylinder is used as an atmospheric passage. A terminal wall portion having a communication port opened therein is successively connected to the end wall portion, and the atmospheric passage is communicated with the atmosphere through the filter housed in the storage portion and the communication port, and a valve plate is provided on the outside of the filter. The outer periphery of the valve plate is placed in elastic contact with the inner surface of the end wall where the communication port is opened, and when a pressure difference is generated inside and outside the valve plate due to the operation of the vacuum booster, the pressure difference causes A muffling device for a vacuum booster, characterized in that the outer circumference of the plate is separated from the inner surface of the end wall.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8560479U JPS591873Y2 (en) | 1979-06-22 | 1979-06-22 | Silencer for vacuum booster |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8560479U JPS591873Y2 (en) | 1979-06-22 | 1979-06-22 | Silencer for vacuum booster |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS563064U JPS563064U (en) | 1981-01-12 |
JPS591873Y2 true JPS591873Y2 (en) | 1984-01-19 |
Family
ID=29318800
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8560479U Expired JPS591873Y2 (en) | 1979-06-22 | 1979-06-22 | Silencer for vacuum booster |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS591873Y2 (en) |
-
1979
- 1979-06-22 JP JP8560479U patent/JPS591873Y2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS563064U (en) | 1981-01-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH0535027Y2 (en) | ||
JPH032706B2 (en) | ||
SK278488B6 (en) | The valve assembly for controlling pneumatic brake booster | |
US4274258A (en) | Dust-boot for a vacuum booster | |
JPS591873Y2 (en) | Silencer for vacuum booster | |
JP3635677B2 (en) | Booster | |
JP4278427B2 (en) | Pneumatic booster with tubular intake valve and pressure equalizing valve | |
JPH10510228A (en) | Booster with variable flow additional air intake | |
JPS58110359A (en) | Booster for brake | |
JP3350684B2 (en) | Booster | |
JP3107886B2 (en) | Pneumatic booster | |
JPS5923654Y2 (en) | Silencer for vacuum booster | |
US20040016340A1 (en) | Brake booster for a vehicle | |
JP3785985B2 (en) | Booster valve mechanism | |
JPH0347016Y2 (en) | ||
JP2849849B2 (en) | Pneumatic booster | |
JP2586529Y2 (en) | Booster | |
US5802950A (en) | Brake booster for vehicles | |
JPH0412848Y2 (en) | ||
JP2967379B2 (en) | Negative pressure booster | |
KR200296183Y1 (en) | Valve body of Brake booster for vehicle | |
KR100536296B1 (en) | Brake booster for vehicle | |
JP2976466B2 (en) | Negative pressure booster | |
KR100595460B1 (en) | A vacuum booster | |
JP3358642B2 (en) | Booster |