WO2014010017A1 - Fluid control valve - Google Patents

Fluid control valve Download PDF

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Publication number
WO2014010017A1
WO2014010017A1 PCT/JP2012/067483 JP2012067483W WO2014010017A1 WO 2014010017 A1 WO2014010017 A1 WO 2014010017A1 JP 2012067483 W JP2012067483 W JP 2012067483W WO 2014010017 A1 WO2014010017 A1 WO 2014010017A1
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WO
WIPO (PCT)
Prior art keywords
holder
diameter
diameter cylindrical
hole
control valve
Prior art date
Application number
PCT/JP2012/067483
Other languages
French (fr)
Japanese (ja)
Inventor
克典 高井
暁 長谷川
横山　雅之
Original Assignee
三菱電機株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2012/067483 priority Critical patent/WO2014010017A1/en
Priority to CN201290001271.3U priority patent/CN204437455U/en
Priority to JP2014524512A priority patent/JP5619327B2/en
Publication of WO2014010017A1 publication Critical patent/WO2014010017A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/226—Shaping or arrangements of the sealing
    • F16K1/2268—Sealing means for the axis of rotation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1035—Details of the valve housing
    • F02D9/106—Sealing of the valve shaft in the housing, e.g. details of the bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/72—Housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/224—Details of bearings for the axis of rotation

Definitions

  • This invention relates to a fluid control valve such as an exhaust gas recirculation (EGR) valve.
  • EGR exhaust gas recirculation
  • fluid control valves (butterfly type, poppet type, flap type, etc.) have been used to scrape off foreign matter such as fluid and exhaust gas deposits around the valve shaft and prevent fluid and foreign matter from entering the bearing.
  • a filter such as a mesh filter is used, and a holder is installed to hold the filter.
  • the bearing portion is pressurized in the axial direction with an O-ring as in Patent Document 1, and is brought into contact with the stepped end surface of the housing.
  • the present invention has been made to solve the above-described problems, and an object thereof is to eliminate the need for a pressurizing member for supporting the bearing portion and to reduce the number of parts.
  • the fluid control valve according to the present invention includes a fluid passage through which a fluid flows, a through hole communicating with the fluid passage, a housing having a reduced diameter portion obtained by reducing a part of the through hole, and a large diameter inserted into the through hole.
  • a holder having a shoulder portion to be generated, a filter accommodated in a large-diameter cylindrical portion of the holder, a bearing portion supported in contact with a predetermined support portion by the action of axial pressure, and a through hole
  • the valve shaft is inserted into the fluid passage and supported by the bearing portion, and the valve body operates integrally with the valve shaft to open and close the fluid passage.
  • the pressurizing member for supporting the bearing portion is generated by generating the axial pressurization with the holder for holding the filter and supporting the bearing portion in a state in contact with the predetermined support portion. It becomes unnecessary. Therefore, the number of parts constituting the fluid control valve can be reduced.
  • FIG. 6 It is a longitudinal cross-sectional view which shows the structure of the valve for fluid control which concerns on Embodiment 1 of this invention. It is an enlarged view of the holder periphery of the valve for fluid control shown in FIG. 6 is an enlarged view showing a holder modification of the fluid control valve according to Embodiment 1. FIG. 6 is an enlarged view showing a holder modification of the fluid control valve according to Embodiment 1. FIG. 6 is an enlarged view showing a holder modification of the fluid control valve according to Embodiment 1. FIG.
  • Embodiment 1 FIG.
  • the EGR valve 1 shown in FIG. 1 transmits the rotational driving force generated by the motor 2 to the valve shaft 4 by gears (not shown) housed in the gear box 3, and is fixed to the valve shaft 4 with screws 5 or the like.
  • the butterfly type valve element 6 is rotated to open and close the fluid passage 8 formed in the housing 7 and control the flow rate of the exhaust gas flowing through the fluid passage 8.
  • the housing 7 is provided with a through hole 9 for communicating the outside with the fluid passage 8.
  • the valve shaft 4 is inserted into the through hole 9.
  • a reduced diameter portion 10 having a reduced inner diameter is formed on the end side of the through hole 9 that opens to the fluid passage 8.
  • the through-hole 9 is provided with a filter 11 such as a mesh filter, a holder 12 that holds the filter 11, a ring-shaped plate 13, and a bearing portion 14 that rotatably supports the valve shaft 4.
  • a plug (supporting portion) 15 is press-fitted to the end of the through hole 9 that opens to the outside, and the through hole 9 is closed.
  • the metal holder 12 includes a cylindrical large-diameter cylindrical portion 12a having substantially the same diameter as the through-hole 9, and a cylindrical small-diameter tube having a smaller diameter than the large-diameter cylindrical portion 12a and substantially the same diameter as the reduced diameter portion 10. It is comprised from the part 12b and the shoulder part 12c which connects the large diameter cylinder part 12a and the small diameter cylinder part 12b.
  • the large diameter cylindrical portion 12a houses the filter 11 therein.
  • the small-diameter cylindrical portion 12b has a length in the axial direction of the small-diameter cylindrical portion 12b longer than the axial length of the reduced-diameter portion 10 to form a protruding portion 12d that protrudes into the fluid passage 8.
  • the shoulder portion 12c includes a planar straight portion 12c-1 bent vertically from the small diameter cylindrical portion 12b, and a tapered portion 12c inclined from the end of the straight portion 12c-1 toward the end of the large diameter cylindrical portion 12a. -2.
  • the holder 12 When assembling the EGR valve 1, the holder 12 is inserted into the through hole 9 of the housing 7, and the small diameter cylindrical portion 12 b is press-fitted into the reduced diameter portion 10.
  • the holder 12 is installed in the through hole 9 by press-fitting the small diameter cylindrical portion 12 b into the reduced diameter portion 10.
  • the holder 12 is positioned by bringing the straight portion 12c-1 into contact with the step portion 10a.
  • the tapered portion 12c-2 can be elastically deformed in this gap so that the spring property of the holder 12 in the axial direction can be secured. Become.
  • the holder 12 may be fixed by abutting the straight portion 12c-1 and the stepped portion 10a, instead of pressing the small diameter cylindrical portion 12b into the reduced diameter portion 10 and fixing the holder 12.
  • the small diameter cylindrical portion 12b may be inserted into the reduced diameter portion 10.
  • the filter 11 and the plate 13 are inserted into the through hole 9, the filter 11 is accommodated in the large diameter cylindrical portion 12a, and the plate 13 is brought into contact with the end of the large diameter cylindrical portion 12a.
  • the bearing portion 14 is press-fitted into the through hole 9.
  • a plug 15 (not shown in FIG. 2) is press-fitted into the through hole 9 to press the holder 12 through the bearing portion 14 and the plate 13.
  • the tapered portion 12c-2 of the holder 12 is compressed, and a pressure is generated in the axial direction indicated by the arrow in FIG.
  • the holder 12 pressurizes the bearing portion 14 in the axial direction via the plate 13 and abuts against the plug 15 to support it. Therefore, it is necessary to assemble the plug 15 with a pressure input that does not detach even when this pressure is applied.
  • the filter 11, the holder 12, the plate 13, and the bearing portion 14 can be installed in the through hole 9 on the opposite side across the fluid passage 8.
  • the holder 12, the filter 11, the plate 13 and the bearing portion 14 are inserted or press-fitted from the end of the through hole 9 opened to the gear box 3 side, and finally, the valve shaft 4 is inserted into the gear box. It is only necessary to press-fit the holder 12 by press-fitting a plate or the like (corresponding to the plug 15) having a hole for passing through 3.
  • the protrusion 12 d of the holder 12 protrudes into the fluid passage 8, so that intrusion of exhaust gas or the like into the holder 12 can be suppressed.
  • the tip of the projecting portion 12d is bent toward the valve shaft 4 to reduce the distance between the tip and the valve shaft 4 to narrow the opening, thereby further suppressing the intrusion of exhaust gas or the like into the holder 12. It has a structure to do. Further, by making the bent shape of the projecting portion 12d into a smooth R shape, it is possible to obtain a structure in which the flow of exhaust gas in the fluid passage 8 is hardly obstructed (vortices are not easily generated). However, the bent shape of the protruding portion 12d is not limited to the R shape.
  • a space may be provided between the small-diameter cylindrical portion 12b and the valve shaft 4 to form a reservoir portion 12e so that even if exhaust gas deposits or the like enter the holder 12 to some extent, the structure can be accumulated in the reservoir portion 12e.
  • the reservoir 12e is provided in the space inside the small diameter cylindrical portion 12b to widen the intrusion. It is possible to collect exhaust gas deposits and the like. Therefore, clogging between the small-diameter cylindrical portion 12b and the valve shaft 4 due to accumulation of substances such as exhaust gas deposits and sticking of the valve shaft 4 can be suppressed.
  • the reduced diameter portion 10 opened to the fluid passage 8 and the through hole 9 around the reduced diameter portion 10 are used. Corrosion is likely to occur because the flow of exhaust gas tends to stagnate. If the holder 12 is not installed between the valve shaft 4 and the housing 7, the surface of the reduced diameter portion 10 and the through hole 9 around the reduced diameter portion 10 is unevenly roughened when aluminum, cast iron, or the like corrodes. Since exhaust gas deposits and the like are easily deposited and fixed, the concern that the valve shaft 4 is fixed increases.
  • the holder 12 itself is prevented by configuring the holder 12 with a corrosion-resistant material such as stainless steel. Further, since the holder 12 covers the reduced diameter portion 10 opened to the fluid passage 8 and the through hole 9 around the reduced diameter portion 10 so as not to contact the exhaust gas, corrosion on the housing 7 side can also be suppressed. Furthermore, since the small-diameter cylindrical portion 12b of the holder 12 is press-fitted into the reduced-diameter portion 10 of the through hole 9, a gap between the two can be eliminated and corrosion of the press-fitted portion can be prevented.
  • the EGR valve 1 includes the fluid passage 8 through which the exhaust gas flows, the through hole 9 communicating with the fluid passage 8, and the reduced diameter portion 10 in which a part of the through hole 9 is reduced in diameter.
  • a housing 7 having a large-diameter cylindrical portion 12a inserted into the through-hole 9, a small-diameter cylindrical portion 12b press-fitted or inserted into the reduced-diameter portion 10, and the large-diameter cylindrical portion 12a and the small-diameter cylindrical portion 12b.
  • a holder 12 having a shoulder 12c that generates axial pressure at a position in contact with a stepped portion 10a between 9 and the reduced diameter portion 10, a filter 11 housed in the large diameter cylindrical portion 12a of the holder 12, and a shaft
  • a bearing portion 14 that is supported in contact with the plug 15 by the pressure applied in the direction, a valve shaft 4 that is inserted into the fluid passage 8 through the through hole 9 and is supported by the bearing portion 14, and a valve shaft 4.
  • a valve body 6 that opens and closes the fluid passage 8. It was configured to obtain. For this reason, the pressurizing member for supporting the bearing part 14 becomes unnecessary, and the number of parts constituting the EGR valve 1 can be reduced.
  • the holder 12 has the tapered portion 12c-2 formed on at least a part of the shoulder portion 12c, and is elasticated by the gap formed between the tapered portion 12c-2 and the stepped portion 10a. It was configured to generate a preload by deformation. Therefore, the taper portion 12c-2 that receives the pressing force of the plug 15 is compressed, so that the spring property of the holder 12 can be easily ensured.
  • the holder 12 is configured to form the straight portion 12c-1 in contact with the stepped portion 10a on at least a part of the shoulder portion 12c. Therefore, the holder 12 can be positioned by the straight portion 12c-1, and the holder 12 can be easily installed. Further, since the tapered portion 12c-2 is elastically deformed with the straight portion 12c-1 as a fulcrum, a more stable spring property can be ensured.
  • the holder 12 is configured to have the protruding portion 12d having a shape in which the end of the small diameter cylindrical portion 12b protrudes into the fluid passage 8. For this reason, exhaust gas, exhaust gas deposit, condensed water and the like can be prevented from entering the filter 11 and the bearing portion 14 in the holder 12.
  • the holder 12 is made of a corrosion-resistant material such as stainless steel, so that not only corrosion of the holder 12 is prevented, but also the housing 7 covered with the holder 12 Corrosion can also be prevented.
  • the holder 12 is configured to have the reservoir portion 12e for collecting foreign matter such as exhaust gas deposit between the small-diameter cylindrical portion 12b and the valve shaft 4. For this reason, there is a space between the small-diameter cylindrical portion 12b and the valve shaft 4, and clogging and sticking are less likely to occur even if substances such as exhaust gas deposits accumulate.
  • the holder 12 is not limited to the shape shown in FIG. 2 as long as it has a shape that can ensure the spring property and generate the axial pressure.
  • modified examples will be described.
  • the entire shoulder portion 12c is tapered, and the straight portion 12c-1 as shown in FIG. 2 is omitted.
  • the tapered shoulder portion 12 c is compressed in the gap between the reduced diameter portion 10.
  • the bearing portion 14 can be supported by being brought into contact with the plug 15.
  • the entire shoulder portion 12c has a straight shape, and the tapered portion 12c-2 as shown in FIG. 2 is omitted.
  • a convex portion 10b that protrudes toward the shoulder portion 12c is formed at a position of the housing 7 facing the shoulder portion 12c, that is, the reduced diameter portion 10.
  • a part of the shoulder portion 12c comes into contact with the convex portion 10b to become a fulcrum, and the remaining portion is elastically deformed, and the spring property of the holder 12 is ensured. Therefore, the holder 12 can support the bearing portion 14 by preloading it in the axial direction and abutting against a plug 15 (not shown).
  • the entire shoulder portion 12c has a straight shape, and the tapered portion 12c-2 as shown in FIG. 2 is omitted.
  • the shoulder portion 12c is formed with a convex portion 12f protruding toward the reduced diameter portion 10 side.
  • the convex portion 12f abuts on the stepped portion 10a to become a fulcrum, the shoulder portion 12c is elastically deformed, and the spring property of the holder 12 is ensured. Therefore, the holder 12 can support the bearing portion 14 by pressurizing it in the axial direction and abutting against the plug 15 (not shown).
  • the plate 13 is interposed between the holder 12 and the bearing portion 14, but the plate 13 may be omitted.
  • the plug 15 is used as a support portion of the bearing portion 14 and the bearing portion 14 is supported by contacting the plug 15.
  • the support portion is not limited to the plug 15.
  • another component such as a plate may be interposed between the bearing portion 14 and the plug 15.
  • the holder 12 is applied to the butterfly type fluid control valve that opens and closes the fluid passage 8 when the valve shaft 4 rotates around the central axis.
  • the holder 12 is limited to the butterfly type.
  • the holder 12 may be applied to a fluid control valve such as a flap type.
  • the holder 12 can also be applied to a fluid control valve, such as a poppet type, that opens and closes the fluid passage 8 by reciprocating the valve shaft 4 in the axial direction.
  • it can be used for uses other than an EGR valve.
  • the present invention can be modified with any constituent element of the embodiment or omitted with any constituent element of the embodiment.
  • the fluid control valve according to the present invention generates axial pressure by the holder 12 for holding the filter 11 and supports the bearing portion 14, so that the butterfly type, poppet Suitable for use in valves of type, flap type, etc.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lift Valve (AREA)
  • Details Of Valves (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

A holder (12) has a large-diameter sleeve part (12a) for accommodating a filter (11), a small-diameter sleeve part (12b) press-fitted into a reduced-diameter part (10) of a housing (7), and a shoulder part (12c) for connecting the large-diameter sleeve part (12a) and the small-diameter sleeve part (12b) and generating a compression in the axial direction at a position adjacent to a step part (10a). A bearing part (14) is supported by receiving the compression of the holder (12) via a plate (13).

Description

流体制御用バルブValve for fluid control
　この発明は、排気ガス再循環（ＥＧＲ）バルブ等の流体制御用バルブに関する。 This invention relates to a fluid control valve such as an exhaust gas recirculation (EGR) valve.
　従来、流体制御用バルブ（バタフライタイプ、ポペットタイプ、フラップタイプ等）には、弁軸周りに付着する流体および排ガスデポジット等の異物を掻き落としたり、軸受け部への流体および異物の侵入を抑制したりするために、メッシュフィルタ等のフィルタが使用されており、そのフィルタ保持のためにホルダが設置されていた。一方、軸受け部の支持のためには、例えば、特許文献１のように軸受け部をＯリングで軸方向に与圧してハウジングの段部端面に当接させたり、特許文献２のように軸受け部をコイルばねで軸方向に与圧して弁軸の段部端面に当接させたり、特許文献３のように軸受け部をリングシール部で軸方向に与圧してラビリンスシール部に当接させたりしていた。 Conventionally, fluid control valves (butterfly type, poppet type, flap type, etc.) have been used to scrape off foreign matter such as fluid and exhaust gas deposits around the valve shaft and prevent fluid and foreign matter from entering the bearing. For example, a filter such as a mesh filter is used, and a holder is installed to hold the filter. On the other hand, in order to support the bearing portion, for example, the bearing portion is pressurized in the axial direction with an O-ring as in Patent Document 1, and is brought into contact with the stepped end surface of the housing. Can be pressed in the axial direction with a coil spring and brought into contact with the stepped end surface of the valve shaft, or the bearing part can be pressed in the axial direction with a ring seal part and brought into contact with the labyrinth seal part as in Patent Document 3. It was.
特開２００５－１２０９３２号公報JP 2005-120932 A 特開２００５－２９１１２９号公報JP 2005-291129 A 特開２００７－３２３０１号公報Japanese Patent Laid-Open No. 2007-32301
　従来の流体制御用バルブは以上のように構成されているので、軸受け部を支持するために、与圧を発生させるための別部品（Ｏリング、コイルばね、リングシール部等）が必要であった。そのため、部品点数が増え、構成に必要なスペースが大きくなるという課題があった。 Since the conventional fluid control valve is configured as described above, separate parts (O-ring, coil spring, ring seal part, etc.) for generating a pressurization are required to support the bearing part. It was. For this reason, there is a problem that the number of parts increases and the space required for the configuration increases.
　この発明は、上記のような課題を解決するためになされたもので、軸受け部を支持するための与圧部材を不要にして、部品点数を減らすことを目的とする。 The present invention has been made to solve the above-described problems, and an object thereof is to eliminate the need for a pressurizing member for supporting the bearing portion and to reduce the number of parts.
　この発明の流体制御用バルブは、流体が流通する流体通路、流体通路に連通する貫通穴、および貫通穴の一部を縮径した縮径部を有するハウジングと、貫通穴に挿入された大径筒部、縮径部に圧入または挿入された小径筒部、および大径筒部と小径筒部を接続し、貫通穴と縮径部の間の段差部に接する位置で軸方向の与圧を発生させる肩部を有するホルダと、ホルダの大径筒部に収容されたフィルタと、軸方向の与圧の作用によって所定の支持部に当接した状態で支持された軸受け部と、貫通穴から流体通路に挿入され、軸受け部に軸支された弁軸と、弁軸と一体に動作して、流体通路を開閉する弁体とを備えるものである。 The fluid control valve according to the present invention includes a fluid passage through which a fluid flows, a through hole communicating with the fluid passage, a housing having a reduced diameter portion obtained by reducing a part of the through hole, and a large diameter inserted into the through hole. Connect the cylindrical part, the small-diameter cylindrical part press-fitted or inserted into the reduced-diameter part, and the large-diameter cylindrical part and the small-diameter cylindrical part, and apply axial pressure at a position that contacts the stepped part between the through hole and the reduced-diameter part A holder having a shoulder portion to be generated, a filter accommodated in a large-diameter cylindrical portion of the holder, a bearing portion supported in contact with a predetermined support portion by the action of axial pressure, and a through hole The valve shaft is inserted into the fluid passage and supported by the bearing portion, and the valve body operates integrally with the valve shaft to open and close the fluid passage.
　この発明によれば、フィルタ保持用のホルダで軸方向の与圧を発生させ、軸受け部を所定の支持部に当接した状態で支持することにより、軸受け部を支持するための与圧部材が不要となる。よって、流体制御用バルブを構成する部品点数を減らすことができる。 According to this invention, the pressurizing member for supporting the bearing portion is generated by generating the axial pressurization with the holder for holding the filter and supporting the bearing portion in a state in contact with the predetermined support portion. It becomes unnecessary. Therefore, the number of parts constituting the fluid control valve can be reduced.
この発明の実施の形態１に係る流体制御用バルブの構成を示す縦断面図である。It is a longitudinal cross-sectional view which shows the structure of the valve for fluid control which concerns on Embodiment 1 of this invention. 図１に示す流体制御用バルブのホルダ周辺の拡大図である。It is an enlarged view of the holder periphery of the valve for fluid control shown in FIG. 実施の形態１に係る流体制御用バルブのホルダ変形例を示す拡大図である。6 is an enlarged view showing a holder modification of the fluid control valve according to Embodiment 1. FIG. 実施の形態１に係る流体制御用バルブのホルダ変形例を示す拡大図である。6 is an enlarged view showing a holder modification of the fluid control valve according to Embodiment 1. FIG. 実施の形態１に係る流体制御用バルブのホルダ変形例を示す拡大図である。6 is an enlarged view showing a holder modification of the fluid control valve according to Embodiment 1. FIG.
　以下、この発明をより詳細に説明するために、この発明を実施するための形態について、添付の図面に従って説明する。
実施の形態１．
　図１に示すＥＧＲバルブ１は、モータ２が発生させる回転駆動力を、ギアボックス３に収容されたギア類（不図示）によって弁軸４に伝達し、この弁軸４にネジ５等により固定されたバタフライタイプの弁体６を回転して、ハウジング７に形成された流体通路８を開閉し、流体通路８を流れる排ガス流量を制御する構成である。 Hereinafter, in order to explain the present invention in more detail, modes for carrying out the present invention will be described with reference to the accompanying drawings.
Embodiment 1 FIG.
The EGR valve 1 shown in FIG. 1 transmits the rotational driving force generated by the motor 2 to the valve shaft 4 by gears (not shown) housed in the gear box 3, and is fixed to the valve shaft 4 with screws 5 or the like. In this configuration, the butterfly type valve element 6 is rotated to open and close the fluid passage 8 formed in the housing 7 and control the flow rate of the exhaust gas flowing through the fluid passage 8.
　ハウジング７には外部と流体通路８とを連通する貫通穴９が設けられている。この貫通穴９には弁軸４が挿入される。また、この貫通穴９の、流体通路８に開口する端部側には、内径を縮径した縮径部１０が形成されている。また、貫通穴９には、メッシュフィルタ等のフィルタ１１、このフィルタ１１を保持するホルダ１２、リング状のプレート１３、弁軸４を回転自在に軸支する軸受け部１４が設置されている。さらに、貫通穴９の、外部に開口する端部側には、プラグ（支持部）１５が圧入され、貫通穴９が閉塞されている。 The housing 7 is provided with a through hole 9 for communicating the outside with the fluid passage 8. The valve shaft 4 is inserted into the through hole 9. Further, a reduced diameter portion 10 having a reduced inner diameter is formed on the end side of the through hole 9 that opens to the fluid passage 8. The through-hole 9 is provided with a filter 11 such as a mesh filter, a holder 12 that holds the filter 11, a ring-shaped plate 13, and a bearing portion 14 that rotatably supports the valve shaft 4. Further, a plug (supporting portion) 15 is press-fitted to the end of the through hole 9 that opens to the outside, and the through hole 9 is closed.
　次に、図２の拡大図を用いて、ホルダ１２の詳細を説明する。
　金属製のホルダ１２は、貫通穴９と略同径の円筒状の大径筒部１２ａと、この大径筒部１２ａより小径であって縮径部１０と略同径の円筒状の小径筒部１２ｂと、大径筒部１２ａと小径筒部１２ｂとを接続する肩部１２ｃとから構成されている。大径筒部１２ａは、その内部にフィルタ１１を収容する。小径筒部１２ｂをこの小径筒部１２ｂの軸方向の長さを、縮径部１０の軸方向の長さより長くして、流体通路８内に突出した突出部１２ｄを形成している。肩部１２ｃは、小径筒部１２ｂから垂直に折れ曲がった平面状のストレート部１２ｃ－１と、このストレート部１２ｃ－１の端部から大径筒部１２ａの端部へ向かって傾斜したテーパ部１２ｃ－２とを有する。 Next, details of the holder 12 will be described using the enlarged view of FIG.
The metal holder 12 includes a cylindrical large-diameter cylindrical portion 12a having substantially the same diameter as the through-hole 9, and a cylindrical small-diameter tube having a smaller diameter than the large-diameter cylindrical portion 12a and substantially the same diameter as the reduced diameter portion 10. It is comprised from the part 12b and the shoulder part 12c which connects the large diameter cylinder part 12a and the small diameter cylinder part 12b. The large diameter cylindrical portion 12a houses the filter 11 therein. The small-diameter cylindrical portion 12b has a length in the axial direction of the small-diameter cylindrical portion 12b longer than the axial length of the reduced-diameter portion 10 to form a protruding portion 12d that protrudes into the fluid passage 8. The shoulder portion 12c includes a planar straight portion 12c-1 bent vertically from the small diameter cylindrical portion 12b, and a tapered portion 12c inclined from the end of the straight portion 12c-1 toward the end of the large diameter cylindrical portion 12a. -2.
　ＥＧＲバルブ１を組み立てる際、ハウジング７の貫通穴９にホルダ１２を挿入して、小径筒部１２ｂを縮径部１０に圧入する。小径筒部１２ｂを縮径部１０に圧入することにより、ホルダ１２を貫通穴９内に設置する。このとき、ストレート部１２ｃ－１を段差部１０ａに当接させて、ホルダ１２を位置決めする。他方、テーパ部１２ｃ－２と段差部１０ａとの間には隙間が形成されるので、この隙間においてテーパ部１２ｃ－２が弾性変形可能となり、ホルダ１２の軸方向のバネ性が確保できるようになる。
　あるいは、小径筒部１２ｂを縮径部１０に圧入してホルダ１２を固定するのではなく、ストレート部１２ｃ－１と段差部１０ａの当接によりホルダ１２を固定してもよい。この場合には小径筒部１２ｂは縮径部１０に挿入すればよい。 When assembling the EGR valve 1, the holder 12 is inserted into the through hole 9 of the housing 7, and the small diameter cylindrical portion 12 b is press-fitted into the reduced diameter portion 10. The holder 12 is installed in the through hole 9 by press-fitting the small diameter cylindrical portion 12 b into the reduced diameter portion 10. At this time, the holder 12 is positioned by bringing the straight portion 12c-1 into contact with the step portion 10a. On the other hand, since a gap is formed between the tapered portion 12c-2 and the stepped portion 10a, the tapered portion 12c-2 can be elastically deformed in this gap so that the spring property of the holder 12 in the axial direction can be secured. Become.
Alternatively, the holder 12 may be fixed by abutting the straight portion 12c-1 and the stepped portion 10a, instead of pressing the small diameter cylindrical portion 12b into the reduced diameter portion 10 and fixing the holder 12. In this case, the small diameter cylindrical portion 12b may be inserted into the reduced diameter portion 10.
　続いて、貫通穴９にフィルタ１１およびプレート１３を挿入し、このフィルタ１１を大径筒部１２ａの内部に収容し、プレート１３を大径筒部１２ａの端部に当接させる。続いて、貫通穴９に軸受け部１４を圧入する。最後に、プラグ１５（図２では図示せず）を貫通穴９に圧入して、軸受け部１４およびプレート１３を介してホルダ１２を押圧する。この押圧力を受けて、ホルダ１２のテーパ部１２ｃ－２が圧縮され、図２に矢印で示す軸方向に与圧が発生する。そして、ホルダ１２が、プレート１３を介して軸受け部１４を軸方向に与圧し、プラグ１５に当接させて支持する。従って、プラグ１５は、この与圧を受けても離脱しない圧入力で組み付けることが必要である。 Subsequently, the filter 11 and the plate 13 are inserted into the through hole 9, the filter 11 is accommodated in the large diameter cylindrical portion 12a, and the plate 13 is brought into contact with the end of the large diameter cylindrical portion 12a. Subsequently, the bearing portion 14 is press-fitted into the through hole 9. Finally, a plug 15 (not shown in FIG. 2) is press-fitted into the through hole 9 to press the holder 12 through the bearing portion 14 and the plate 13. In response to this pressing force, the tapered portion 12c-2 of the holder 12 is compressed, and a pressure is generated in the axial direction indicated by the arrow in FIG. Then, the holder 12 pressurizes the bearing portion 14 in the axial direction via the plate 13 and abuts against the plug 15 to support it. Therefore, it is necessary to assemble the plug 15 with a pressure input that does not detach even when this pressure is applied.
　これにより、従来、軸受け部１４を与圧して支持するために必要であったＯリング、コイルばね、リップシール、ウェーブワッシャ等の別部品の与圧部材を省略することができ、構成部品点数を減らすことができる。また、従来は別部品の与圧部材を設置するためのスペースが必要であったが、本構造のホルダ１２を採用することにより、そのようなスペースが不要となり、ＥＧＲバルブ１の小型化を図ることができる。 As a result, it is possible to omit a separate pressurizing member such as an O-ring, a coil spring, a lip seal, and a wave washer, which has conventionally been required to pressurize and support the bearing portion 14, and to reduce the number of components. Can be reduced. Conventionally, a space for installing a separate pressurizing member has been required. However, by adopting the holder 12 having this structure, such a space becomes unnecessary, and the EGR valve 1 can be downsized. be able to.
　また、図１では隠れて見えないが、流体通路８を挟んだ反対側の貫通穴９にも、フィルタ１１、ホルダ１２、プレート１３、および軸受け部１４を設置可能である。ＥＧＲバルブ１を組み立てる際には、ギアボックス３側に開口した貫通穴９の端部からホルダ１２、フィルタ１１、プレート１３および軸受け部１４を挿入または圧入し、最後に、弁軸４をギアボックス３内に貫通させるための穴が開いたプレート等（プラグ１５に相当する）を圧入してホルダ１２を押圧すればよい。 Although not visible in FIG. 1, the filter 11, the holder 12, the plate 13, and the bearing portion 14 can be installed in the through hole 9 on the opposite side across the fluid passage 8. When assembling the EGR valve 1, the holder 12, the filter 11, the plate 13 and the bearing portion 14 are inserted or press-fitted from the end of the through hole 9 opened to the gear box 3 side, and finally, the valve shaft 4 is inserted into the gear box. It is only necessary to press-fit the holder 12 by press-fitting a plate or the like (corresponding to the plug 15) having a hole for passing through 3.
　ＥＧＲバルブ１の動作時、流体通路８を流通する排ガス、この排ガスに含まれるデポジット、および、この排ガスに含まれる水蒸気が凝縮した凝縮水等が、弁軸４と貫通穴９の隙間からフィルタ１１および軸受け部１４へ侵入してくる。この侵入をフィルタ１１が抑制する。また、フィルタ１１は、弁軸４の外周面に付着した排ガス等を掻き落とす。 During operation of the EGR valve 1, exhaust gas flowing through the fluid passage 8, deposits contained in the exhaust gas, condensed water condensed with water vapor contained in the exhaust gas, and the like are filtered from the gap between the valve shaft 4 and the through hole 9. And it penetrates into the bearing part 14. This intrusion is suppressed by the filter 11. Further, the filter 11 scrapes off the exhaust gas and the like adhering to the outer peripheral surface of the valve shaft 4.
　このとき、ホルダ１２の突出部１２ｄが流体通路８内に飛び出していることによって、ホルダ１２内への排ガス等の侵入を抑制することができる。また、この突出部１２ｄの先端を弁軸４側へ曲げて、先端と弁軸４との間の距離を縮小して開口部を狭くして、ホルダ１２内への排ガス等の侵入をさらに抑制する構造としている。また、突出部１２ｄの曲げ形状を滑らかなＲ形状にすることで、流体通路８内の排ガスの流れを阻害しにくい（渦が発生しにくい）構造とすることができる。ただし、突出部１２ｄの曲げ形状はＲ形状に限定されるものではない。 At this time, the protrusion 12 d of the holder 12 protrudes into the fluid passage 8, so that intrusion of exhaust gas or the like into the holder 12 can be suppressed. Further, the tip of the projecting portion 12d is bent toward the valve shaft 4 to reduce the distance between the tip and the valve shaft 4 to narrow the opening, thereby further suppressing the intrusion of exhaust gas or the like into the holder 12. It has a structure to do. Further, by making the bent shape of the projecting portion 12d into a smooth R shape, it is possible to obtain a structure in which the flow of exhaust gas in the fluid passage 8 is hardly obstructed (vortices are not easily generated). However, the bent shape of the protruding portion 12d is not limited to the R shape.
　さらに、小径筒部１２ｂと弁軸４の間にスペースを設けて溜め部１２ｅとし、排ガスデポジット等がホルダ１２内へある程度侵入してもこの溜め部１２ｅに堆積できる構造にしてもよい。これにより、突出部１２ｄを曲げて流体通路８への開口部を狭くして排ガスデポジット等の侵入を抑制しつつ、小径筒部１２ｂの内側の空間には溜め部１２ｅを設けて広くし、侵入してきた排ガスデポジット等を溜めることができる。そのため、排ガスデポジットのような物質の堆積による小径筒部１２ｂと弁軸４の間の詰まり、および弁軸４の固着を抑制することができる。 Furthermore, a space may be provided between the small-diameter cylindrical portion 12b and the valve shaft 4 to form a reservoir portion 12e so that even if exhaust gas deposits or the like enter the holder 12 to some extent, the structure can be accumulated in the reservoir portion 12e. Thus, while the protrusion 12d is bent to narrow the opening to the fluid passage 8 and suppress the intrusion of exhaust gas deposits or the like, the reservoir 12e is provided in the space inside the small diameter cylindrical portion 12b to widen the intrusion. It is possible to collect exhaust gas deposits and the like. Therefore, clogging between the small-diameter cylindrical portion 12b and the valve shaft 4 due to accumulation of substances such as exhaust gas deposits and sticking of the valve shaft 4 can be suppressed.
　なお、ハウジング７を構成する材料として、コストを考慮し、アルミ、鋳鉄等の材料が使用されている場合、流体通路８に開口した縮径部１０およびこの縮径部１０周辺の貫通穴９では排ガスの流れが停滞しやすいので腐食が発生しやすい。仮に、弁軸４とハウジング７の間にホルダ１２が設置されていない場合、アルミおよび鋳鉄等が腐食すると、縮径部１０およびこの縮径部１０周辺の貫通穴９の表面が凸凹に荒れた状態となり、排ガスデポジット等が堆積および固着しやすくなるため、弁軸４の固着につながる懸念が大きくなる。 In consideration of cost, when a material such as aluminum or cast iron is used as a material constituting the housing 7, the reduced diameter portion 10 opened to the fluid passage 8 and the through hole 9 around the reduced diameter portion 10 are used. Corrosion is likely to occur because the flow of exhaust gas tends to stagnate. If the holder 12 is not installed between the valve shaft 4 and the housing 7, the surface of the reduced diameter portion 10 and the through hole 9 around the reduced diameter portion 10 is unevenly roughened when aluminum, cast iron, or the like corrodes. Since exhaust gas deposits and the like are easily deposited and fixed, the concern that the valve shaft 4 is fixed increases.
　そこで、例えばステンレス等の耐腐食性材料でホルダ１２を構成することにより、ホルダ１２自身の腐食を防ぐ。また、このホルダ１２が、流体通路８に開口した縮径部１０およびこの縮径部１０周辺の貫通穴９を被覆して排ガスに接触しないようにするので、ハウジング７側の腐食も抑制できる。さらに、ホルダ１２の小径筒部１２ｂが貫通穴９の縮径部１０に圧入されるので、両者の隙間を無くすことができ、この圧入部分の腐食を防ぐことができる。 Therefore, corrosion of the holder 12 itself is prevented by configuring the holder 12 with a corrosion-resistant material such as stainless steel. Further, since the holder 12 covers the reduced diameter portion 10 opened to the fluid passage 8 and the through hole 9 around the reduced diameter portion 10 so as not to contact the exhaust gas, corrosion on the housing 7 side can also be suppressed. Furthermore, since the small-diameter cylindrical portion 12b of the holder 12 is press-fitted into the reduced-diameter portion 10 of the through hole 9, a gap between the two can be eliminated and corrosion of the press-fitted portion can be prevented.
　以上より、実施の形態１によれば、ＥＧＲバルブ１は、排ガスが流通する流体通路８、流体通路８に連通する貫通穴９、および貫通穴９の一部を縮径した縮径部１０を有するハウジング７と、貫通穴９に挿入された大径筒部１２ａ、縮径部１０に圧入または挿入された小径筒部１２ｂ、および大径筒部１２ａと小径筒部１２ｂを接続し、貫通穴９と縮径部１０の間の段差部１０ａに接する位置で軸方向の与圧を発生させる肩部１２ｃを有するホルダ１２と、ホルダ１２の大径筒部１２ａに収容されたフィルタ１１と、軸方向の与圧の作用によってプラグ１５に当接した状態で支持された軸受け部１４と、貫通穴９から流体通路８に挿入され、軸受け部１４に軸支された弁軸４と、弁軸４と一体に動作して、流体通路８を開閉する弁体６とを備えるように構成した。このため、軸受け部１４を支持するための与圧部材が不要となり、ＥＧＲバルブ１を構成する部品点数を減らすことができる。 As described above, according to the first embodiment, the EGR valve 1 includes the fluid passage 8 through which the exhaust gas flows, the through hole 9 communicating with the fluid passage 8, and the reduced diameter portion 10 in which a part of the through hole 9 is reduced in diameter. A housing 7 having a large-diameter cylindrical portion 12a inserted into the through-hole 9, a small-diameter cylindrical portion 12b press-fitted or inserted into the reduced-diameter portion 10, and the large-diameter cylindrical portion 12a and the small-diameter cylindrical portion 12b. A holder 12 having a shoulder 12c that generates axial pressure at a position in contact with a stepped portion 10a between 9 and the reduced diameter portion 10, a filter 11 housed in the large diameter cylindrical portion 12a of the holder 12, and a shaft A bearing portion 14 that is supported in contact with the plug 15 by the pressure applied in the direction, a valve shaft 4 that is inserted into the fluid passage 8 through the through hole 9 and is supported by the bearing portion 14, and a valve shaft 4. And a valve body 6 that opens and closes the fluid passage 8. It was configured to obtain. For this reason, the pressurizing member for supporting the bearing part 14 becomes unnecessary, and the number of parts constituting the EGR valve 1 can be reduced.
　また、実施の形態１によれば、ホルダ１２は、肩部１２ｃの少なくとも一部にテーパ部１２ｃ－２を形成し、テーパ部１２ｃ－２と段差部１０ａとの間に形成された隙間で弾性変形して予圧を発生させるように構成した。このため、プラグ１５の押圧力を受けたテーパ部１２ｃ－２が圧縮されることにより、ホルダ１２のバネ性を容易に確保することができる。 Further, according to the first embodiment, the holder 12 has the tapered portion 12c-2 formed on at least a part of the shoulder portion 12c, and is elasticated by the gap formed between the tapered portion 12c-2 and the stepped portion 10a. It was configured to generate a preload by deformation. Therefore, the taper portion 12c-2 that receives the pressing force of the plug 15 is compressed, so that the spring property of the holder 12 can be easily ensured.
　また、実施の形態１によれば、ホルダ１２は、肩部１２ｃの少なくとも一部に段差部１０ａに当接するストレート部１２ｃ－１を形成する構成とした。このため、ストレート部１２ｃ－１でホルダ１２の位置決めをすることができ、ホルダ１２を容易に設置することができる。また、ストレート部１２ｃ－１を支点にしてテーパ部１２ｃ－２が弾性変形することにより、より安定したバネ性を確保することができる。 Further, according to the first embodiment, the holder 12 is configured to form the straight portion 12c-1 in contact with the stepped portion 10a on at least a part of the shoulder portion 12c. Therefore, the holder 12 can be positioned by the straight portion 12c-1, and the holder 12 can be easily installed. Further, since the tapered portion 12c-2 is elastically deformed with the straight portion 12c-1 as a fulcrum, a more stable spring property can be ensured.
　また、実施の形態１によれば、ホルダ１２は、小径筒部１２ｂの端部が流体通路８内に突出した形状の突出部１２ｄを有する構成にした。このため、排ガス、排ガスデポジット、および凝縮水等がホルダ１２内のフィルタ１１および軸受け部１４へ侵入してくるのを抑制することができる。 Further, according to the first embodiment, the holder 12 is configured to have the protruding portion 12d having a shape in which the end of the small diameter cylindrical portion 12b protrudes into the fluid passage 8. For this reason, exhaust gas, exhaust gas deposit, condensed water and the like can be prevented from entering the filter 11 and the bearing portion 14 in the holder 12.
　また、実施の形態１によれば、ホルダ１２を、ステンレス等の耐腐食性材料で構成するようにしたので、ホルダ１２の腐食を防止するだけでなく、このホルダ１２に被覆されたハウジング７の腐食も防止することができる。 In addition, according to the first embodiment, the holder 12 is made of a corrosion-resistant material such as stainless steel, so that not only corrosion of the holder 12 is prevented, but also the housing 7 covered with the holder 12 Corrosion can also be prevented.
　また、実施の形態１によれば、ホルダ１２は、小径筒部１２ｂと弁軸４との間に、排ガスデポジット等の異物を溜める溜め部１２ｅを有する構成にした。このため、小径筒部１２ｂと弁軸４の間に空間的余裕ができ、排ガスデポジット等の物質が堆積したとしても詰まりおよび固着が起こりにくくなる。 Further, according to the first embodiment, the holder 12 is configured to have the reservoir portion 12e for collecting foreign matter such as exhaust gas deposit between the small-diameter cylindrical portion 12b and the valve shaft 4. For this reason, there is a space between the small-diameter cylindrical portion 12b and the valve shaft 4, and clogging and sticking are less likely to occur even if substances such as exhaust gas deposits accumulate.
　なお、ホルダ１２は、バネ性を確保して軸方向の与圧を発生可能な形状であればよく、図２の形状に限定されるものではない。以下に、変形例を説明する。
　例えば、図３に示すホルダ１２では、肩部１２ｃの全体をテーパ形状にし、図２のようなストレート部１２ｃ－１を省略している。この構成の場合にも、ホルダ１２が、軸受け部１４およびプレート１３を介して不図示のプラグ１５から押圧力を受けると、テーパ形状の肩部１２ｃが縮径部１０との間の隙間で圧縮されて軸方向の与圧が発生し、軸受け部１４をプラグ１５に当接させて支持することができる。 Note that the holder 12 is not limited to the shape shown in FIG. 2 as long as it has a shape that can ensure the spring property and generate the axial pressure. Hereinafter, modified examples will be described.
For example, in the holder 12 shown in FIG. 3, the entire shoulder portion 12c is tapered, and the straight portion 12c-1 as shown in FIG. 2 is omitted. Even in this configuration, when the holder 12 receives a pressing force from the plug 15 (not shown) via the bearing portion 14 and the plate 13, the tapered shoulder portion 12 c is compressed in the gap between the reduced diameter portion 10. Thus, axial pressure is generated, and the bearing portion 14 can be supported by being brought into contact with the plug 15.
　また例えば、図４に示すホルダ１２では、肩部１２ｃの全体をストレート形状にし、図２のようなテーパ部１２ｃ－２を省略している。また、ハウジング７の、肩部１２ｃに対面する位置、即ち、縮径部１０に、肩部１２ｃ側へ突出する凸部１０ｂを形成している。この構成の場合、肩部１２ｃの一部が凸部１０ｂに当接して支点となり、残りの部分が弾性変形し、ホルダ１２のバネ性が確保される。従って、ホルダ１２は、軸受け部１４を軸方向に予圧して不図示のプラグ１５に当接させて支持することができる。 Further, for example, in the holder 12 shown in FIG. 4, the entire shoulder portion 12c has a straight shape, and the tapered portion 12c-2 as shown in FIG. 2 is omitted. Further, a convex portion 10b that protrudes toward the shoulder portion 12c is formed at a position of the housing 7 facing the shoulder portion 12c, that is, the reduced diameter portion 10. In the case of this configuration, a part of the shoulder portion 12c comes into contact with the convex portion 10b to become a fulcrum, and the remaining portion is elastically deformed, and the spring property of the holder 12 is ensured. Therefore, the holder 12 can support the bearing portion 14 by preloading it in the axial direction and abutting against a plug 15 (not shown).
　また例えば、図５に示すホルダ１２では、肩部１２ｃの全体をストレート形状にし、図２のようなテーパ部１２ｃ－２を省略している。また、肩部１２ｃに、縮径部１０側へ突出する凸部１２ｆを形成している。この構成の場合、凸部１２ｆが段差部１０ａに当接して支点となり、肩部１２ｃが弾性変形し、ホルダ１２のバネ性が確保される。従って、ホルダ１２は、軸受け部１４を軸方向に与圧して不図示のプラグ１５に当接させて支持することができる。 Further, for example, in the holder 12 shown in FIG. 5, the entire shoulder portion 12c has a straight shape, and the tapered portion 12c-2 as shown in FIG. 2 is omitted. Further, the shoulder portion 12c is formed with a convex portion 12f protruding toward the reduced diameter portion 10 side. In the case of this configuration, the convex portion 12f abuts on the stepped portion 10a to become a fulcrum, the shoulder portion 12c is elastically deformed, and the spring property of the holder 12 is ensured. Therefore, the holder 12 can support the bearing portion 14 by pressurizing it in the axial direction and abutting against the plug 15 (not shown).
　なお、図１～図５の例ではホルダ１２と軸受け部１４の間にプレート１３を介在させたが、このプレート１３は省略してもよい。また、軸受け部１４の支持部としてプラグ１５を用い、軸受け部１４をプラグ１５に当接させて支持する構成にしたが、支持部はプラグ１５に限定されるものではない。また、軸受け部１４とプラグ１５の間にプレート等の別部品が介在していてもよい。 1 to 5, the plate 13 is interposed between the holder 12 and the bearing portion 14, but the plate 13 may be omitted. In addition, the plug 15 is used as a support portion of the bearing portion 14 and the bearing portion 14 is supported by contacting the plug 15. However, the support portion is not limited to the plug 15. Further, another component such as a plate may be interposed between the bearing portion 14 and the plug 15.
　また、図１～図５の例では、弁軸４が中心軸回りに回転することにより流体通路８を開閉するバタフライタイプの流体制御用バルブにホルダ１２を適用したが、バタフライタイプに限定されるものではなく、フラップタイプ等の流体制御用バルブにホルダ１２を適用してもよい。また、ポペットタイプ等の、弁軸４が軸方向に往復移動することにより流体通路８を開閉する構造の流体制御用バルブに対しても、ホルダ１２を適用可能である。また、ＥＧＲバルブ以外の用途に使用可能である。 1 to 5, the holder 12 is applied to the butterfly type fluid control valve that opens and closes the fluid passage 8 when the valve shaft 4 rotates around the central axis. However, the holder 12 is limited to the butterfly type. However, the holder 12 may be applied to a fluid control valve such as a flap type. The holder 12 can also be applied to a fluid control valve, such as a poppet type, that opens and closes the fluid passage 8 by reciprocating the valve shaft 4 in the axial direction. Moreover, it can be used for uses other than an EGR valve.
　上記以外にも、本願発明はその発明の範囲内において、実施の形態の任意の構成要素の変形、もしくは実施の形態の任意の構成要素の省略が可能である。 In addition to the above, within the scope of the present invention, the present invention can be modified with any constituent element of the embodiment or omitted with any constituent element of the embodiment.
　以上のように、この発明に係る流体制御用バルブは、フィルタ１１を保持するためのホルダ１２で軸方向の与圧を発生させて、軸受け部１４を支持するようにしたので、バタフライタイプ、ポペットタイプ、フラップタイプ等のバルブに用いるのに適している。 As described above, the fluid control valve according to the present invention generates axial pressure by the holder 12 for holding the filter 11 and supports the bearing portion 14, so that the butterfly type, poppet Suitable for use in valves of type, flap type, etc.
　１　ＥＧＲバルブ、２　モータ、３　ギアボックス、４　弁軸、５　ネジ、６　弁体、７　ハウジング、８　流体通路、９　貫通穴、１０　縮径部、１０ａ　段差部、１０ｂ　凸部、１１　フィルタ、１２　ホルダ、１２ａ　大径筒部、１２ｂ　小径筒部、１２ｃ　肩部、１２ｃ－１　ストレート部、１２ｃ－２　テーパ部、１２ｄ　突出部、１２ｅ　溜め部、１２ｆ　凸部、１３　プレート、１４　軸受け部、１５　プラグ（支持部）。 1 EGR valve, 2 motor, 3 gear box, 4 valve shaft, 5 screw, 6 valve body, 7 housing, 8 fluid passage, 9 through-hole, 10 reduced diameter part, 10a stepped part, 10b convex part, 11 filter, 12 Holder, 12a Large diameter cylindrical part, 12b Small diameter cylindrical part, 12c Shoulder part, 12c-1 Straight part, 12c-2 Tapered part, 12d Projecting part, 12e Reservoir part, 12f Convex part, 13 Plate, 14 Bearing part, 15 Plug (Support part).

Claims (6)

  1. 　流体が流通する流体通路、前記流体通路に連通する貫通穴、および前記貫通穴の一部を縮径した縮径部を有するハウジングと、
    　前記貫通穴に挿入された大径筒部、前記縮径部に圧入または挿入された小径筒部、および前記大径筒部と前記小径筒部を接続し、前記貫通穴と前記縮径部の間の段差部に接する位置で軸方向の与圧を発生させる肩部を有するホルダと、
    　前記ホルダの前記大径筒部に収容されたフィルタと、
    　前記軸方向の与圧の作用によって所定の支持部に当接した状態で支持された軸受け部と、
    　前記貫通穴から前記流体通路に挿入され、前記軸受け部に軸支された弁軸と、
    　前記弁軸と一体に動作して、前記流体通路を開閉する弁体とを備える流体制御用バルブ。     A fluid passage through which a fluid flows, a through hole communicating with the fluid passage, and a housing having a reduced diameter portion obtained by reducing a diameter of a part of the through hole;
    A large-diameter cylindrical portion inserted into the through-hole, a small-diameter cylindrical portion press-fitted or inserted into the reduced-diameter portion, and the large-diameter cylindrical portion and the small-diameter cylindrical portion are connected, and the through-hole and the reduced-diameter portion A holder having a shoulder that generates axial pressure at a position in contact with the stepped portion therebetween,
    A filter accommodated in the large-diameter cylindrical portion of the holder;
    A bearing portion supported in a state of being in contact with a predetermined support portion by the action of the axial pressure,
    A valve shaft inserted into the fluid passage from the through hole and supported by the bearing portion;
    A fluid control valve comprising: a valve body that operates integrally with the valve shaft and opens and closes the fluid passage.
  2. 　前記ホルダは、前記肩部の少なくとも一部にテーパ面が形成され、当該テーパ面と前記段差部との間に形成される隙間で弾性変形して前記与圧を発生させることを特徴とする請求項１記載の流体制御用バルブ。 The holder has a tapered surface formed on at least a part of the shoulder portion, and elastically deforms in a gap formed between the tapered surface and the stepped portion to generate the pressurization. Item 2. The fluid control valve according to Item 1.
  3. 　前記ホルダは、前記肩部の少なくとも一部が前記段差部に当接する形状であることを特徴とする請求項１記載の流体制御用バルブ。 2. The fluid control valve according to claim 1, wherein the holder has a shape in which at least a part of the shoulder is in contact with the stepped portion.
  4. 　前記ホルダは、前記小径筒部の端部が前記流体通路内に突出する形状であることを特徴とする請求項１記載の流体制御用バルブ。 2. The fluid control valve according to claim 1, wherein the holder has a shape in which an end portion of the small diameter cylindrical portion protrudes into the fluid passage.
  5. 　前記ホルダは、耐腐食性材料で構成されていることを特徴とする請求項１記載の流体制御用バルブ。 The fluid control valve according to claim 1, wherein the holder is made of a corrosion-resistant material.
  6. 　前記ホルダは、前記小径筒部と前記弁軸との間に、前記流体に含まれる異物を溜める溜め部を有することを特徴とする請求項１記載の流体制御用バルブ。 2. The fluid control valve according to claim 1, wherein the holder has a reservoir portion for collecting foreign substances contained in the fluid between the small-diameter cylindrical portion and the valve shaft.
PCT/JP2012/067483 2012-07-09 2012-07-09 Fluid control valve WO2014010017A1 (en)

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CN201290001271.3U CN204437455U (en) 2012-07-09 2012-07-09 Fluid control valve
JP2014524512A JP5619327B2 (en) 2012-07-09 2012-07-09 Valve for fluid control

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EP3364080A1 (en) * 2017-02-15 2018-08-22 Hamilton Sundstrand Corporation High temperature shaft seal for bleed valve with roller bearings

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WO2016067464A1 (en) * 2014-10-31 2016-05-06 三菱電機株式会社 Fluid control valve
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JPWO2014010017A1 (en) 2016-06-20
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