WO2019049811A1 - Valve device - Google Patents

Valve device Download PDF

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Publication number
WO2019049811A1
WO2019049811A1 PCT/JP2018/032535 JP2018032535W WO2019049811A1 WO 2019049811 A1 WO2019049811 A1 WO 2019049811A1 JP 2018032535 W JP2018032535 W JP 2018032535W WO 2019049811 A1 WO2019049811 A1 WO 2019049811A1
Authority
WO
WIPO (PCT)
Prior art keywords
wall surface
valve member
valve
housing
seal
Prior art date
Application number
PCT/JP2018/032535
Other languages
French (fr)
Japanese (ja)
Inventor
真一 新田
勇一朗 守谷
Original Assignee
株式会社デンソー
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 株式会社デンソー filed Critical 株式会社デンソー
Priority to DE112018004823.3T priority Critical patent/DE112018004823T5/en
Publication of WO2019049811A1 publication Critical patent/WO2019049811A1/en

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Classifications

    • 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
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
    • F16K41/04—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing
    • F16K41/043—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing for spindles which only rotate, i.e. non-rising spindles
    • F16K41/046—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing for spindles which only rotate, i.e. non-rising spindles for rotating 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
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
    • 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
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F02M26/21—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system with EGR valves located at or near the connection to the intake system
    • 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
    • F02M26/51—EGR valves combined with other devices, e.g. with intake valves or compressors
    • 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
    • F02M26/71—Multi-way valves
    • 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
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/072—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted closure members
    • F16K11/076—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted closure members with sealing faces shaped as surfaces of solids of revolution

Definitions

  • the present disclosure relates to a valve device.
  • a valve device that is provided on a flow path through which fluid can flow and that can control the flow of the fluid.
  • the valve device has a valve housing having a flow path, and a valve member rotatable in the valve housing.
  • a valve housing, a valve member, a rotation angle sensor provided on the opposite side to a flow path across a wall body of the valve housing and capable of detecting a rotation angle of the valve member;
  • a valve arrangement is described which comprises a shaft which is integrally rotatably mounted and which is passed through a through hole of the valve housing.
  • the valve device described in Patent Document 1 includes a bearing provided in a through hole and rotatably supporting a shaft, and a seal portion in the through hole maintaining fluid tightness so that fluid entering the through hole does not flow to the rotation angle sensor.
  • the wall of the valve housing which forms the through hole and supports the bearing and the seal portion is formed such that the length in the direction along the rotation axis of the shaft is relatively long.
  • This indication is made in view of the above-mentioned point, and the object is to provide a valve device which can make a physique small, preventing a fluid leak.
  • the valve device of the present disclosure includes a valve housing, a rotating body, a bearing, and a seal portion.
  • the valve housing has a plurality of flow paths through which fluid can flow, and a communication space communicating the plurality of flow paths.
  • the rotating body is provided in the communication space so as to be rotatable relative to the valve housing.
  • the rotary body is capable of blocking one flow passage and the communication space when the rotary body abuts on an edge of an opening that communicates the one flow passage of the plurality of flow passages and the communication space.
  • the bearing is provided on the wall of the valve housing which forms a through hole through which a part of the rotating body is inserted.
  • the bearing rotatably supports the rotating body.
  • the seal portion is provided on the communication space side of the bearing on the inner wall forming the through hole of the wall.
  • the seal portion has a seal inner space communicating with the communication space on the communication space side.
  • the rotary body has a first rotary portion located in the seal inner space, and a second rotary portion provided on the communication space side of the first rotary portion and positioned in the seal inner space.
  • the distance between the radially outer outer wall surface of the second rotary portion and the radially inner inner wall surface of the seal portion forming the in-seal space is the distance between the radially outer outer wall surface of the first rotary portion and the seal portion It is shorter than the distance to the wall.
  • the fluid in the communication space passes between the outer wall surface of the second rotating portion and the inner wall surface of the seal portion, and between the outer wall surface of the first rotating portion and the inner wall surface of the seal portion There may be a case where a part of the rotating body inserted in the through hole and the wall are intruded.
  • the distance between the outer wall surface of the second rotating portion and the inner wall surface of the seal portion is shorter than the distance between the outer wall surface of the first rotating portion and the inner wall surface of the seal portion.
  • the length of the wall in the direction along the rotation axis of the rotating body can be shortened.
  • the second rotating portion is located in the seal inner space, the length of the valve housing in the direction along the rotation axis of the rotating body can be shortened. Therefore, the valve device of the present disclosure can reduce the body size in the direction along the rotation axis of the rotating body while reducing fluid leakage.
  • FIG. 1 is a schematic view of an engine system to which a valve device according to a first embodiment is applied
  • FIG. 2 is an external view of the valve device according to the first embodiment
  • FIG. 3 is a view on arrow III in FIG. 4 is a cross-sectional view taken along line IV-IV of FIG.
  • FIG. 5 is a cross-sectional view when the EGR passage and the valve chamber of the valve device according to the first embodiment are in communication with each other
  • FIG. 1 is a schematic view of an engine system to which a valve device according to a first embodiment is applied
  • FIG. 2 is an external view of the valve device according to the first embodiment
  • FIG. 5 is a cross-sectional view when the EGR passage and the valve chamber of the valve device according to the first embodiment are in communication with each other
  • FIG. 1 is a schematic view of an engine system to which a valve device according
  • FIG. 6 is a cross-sectional view when the EGR passage and the valve chamber of the valve device according to the first embodiment are shut off, 7 is an enlarged view of a VII arrow part of FIG. 4;
  • Fig. 8 is a partially enlarged view of the valve device according to the second embodiment,
  • FIG. 9 is a partially enlarged view of the valve device according to the third embodiment,
  • FIG. 10 is a partially enlarged view of a valve device according to a fourth embodiment,
  • FIG. 11 is a partially enlarged view of the valve device according to the fifth embodiment,
  • Fig. 12 is a partially enlarged view of the valve device according to the sixth embodiment,
  • FIG. 13 is a partially enlarged view of a valve device according to another embodiment.
  • a valve device 1 according to a first embodiment will be described based on FIGS. 1 to 7.
  • the valve device 1 is applied to an engine system 90 that generates a driving force by burning a fuel.
  • an engine system 90 will be described with reference to FIG.
  • the engine system 90 includes an engine 91, an intake system 92, an exhaust system 93, a supercharger 94, an exhaust gas recirculation system 95, and the like.
  • the engine 91 is a known structure in which a piston 912 is accommodated in a cylinder 911 to form a combustion chamber 910.
  • the intake system 92 supplies air to the engine 91 from the outside air.
  • the intake system 92 includes an intake pipe 921, an intake manifold 922, an air cleaner 923, an intercooler 924, a throttle 925, and the like.
  • intake air the air supplied to the engine 91 is referred to as intake air.
  • the intake pipe 921 is a pipe for guiding the intake air to the combustion chamber 910, and has an intake passage 920. One end of the intake pipe 921 is opened to the outside air, and the other end is connected to the intake manifold 922.
  • the intake manifold 922 is connected to the other end of the intake pipe 921 and the engine 91.
  • the intake manifold 922 has a structure that branches into the same number of passages as the number of cylinders 911.
  • the air cleaner 923 removes foreign matter from air taken in from the atmosphere.
  • the intercooler 924 cools the intake air compressed and heated by the compressor 941 of the turbocharger 94.
  • the throttle 925 adjusts the intake amount of the engine 91.
  • the throttle 925 is electrically connected to an electronic control unit (hereinafter referred to as "ECU") 96.
  • ECU electronice control unit
  • the exhaust system 93 discharges the exhaust gas emitted by the engine 91 to the outside air.
  • the exhaust system 93 includes an exhaust pipe 931, an exhaust manifold 932, and an exhaust purification unit 933.
  • the exhaust pipe 931 is a pipe for guiding the exhaust of the engine 91 to the atmosphere, and has an exhaust passage 930.
  • An exhaust manifold 932 is connected to one end of the exhaust pipe 931 and the engine 91.
  • the exhaust manifold 932 has a structure in which passages equal in number to the number of cylinders 911 are joined.
  • the exhaust purification unit 933 is provided in the exhaust pipe 931.
  • the exhaust purification unit 933 decomposes hydrocarbons contained in the exhaust or captures particulate matter.
  • the supercharger 94 compresses the intake air in the intake pipe 921 using the energy of the exhaust to supercharge the intake air pressurized to the combustion chamber 910.
  • the turbocharger 94 has a compressor 941, a turbine 942, and a shaft 943.
  • the compressor 941 is disposed between the air cleaner 923 and the intercooler 924 in the intake passage 920.
  • the compressor 941 can compress intake air.
  • the turbine 942 is disposed between the exhaust manifold 932 and the exhaust purification unit 933 in the exhaust passage 930.
  • the turbine 942 is rotationally driven by the energy of the exhaust.
  • the shaft 943 connects the compressor 941 and the turbine 942.
  • the compressor 941 and the turbine 942 are synchronously rotated by the shaft 943.
  • the exhaust gas recirculation system 95 recirculates the exhaust gas after passing through the turbine 942 to the intake passage 920.
  • the exhaust gas returned to the intake passage 920 is supplied to the combustion chamber 910 together with the air that has passed through the air cleaner 923.
  • the exhaust gas recirculation system 95 includes an EGR pipe 951, an EGR cooler 952, and the valve device 1.
  • the EGR pipe 951 connects the downstream side of the exhaust gas purification unit 933 of the exhaust pipe 931 and the upstream side of the compressor 941 of the intake pipe 921.
  • the EGR pipe 951 has an EGR passage 950 for recirculating the exhaust after passing through the turbine 942 to the air before compression by the compressor 941.
  • the EGR cooler 952 is provided in the EGR pipe 951.
  • the EGR cooler 952 cools the gas passing through the EGR passage 950.
  • the valve device 1 is provided at a point where the EGR pipe 951 and the intake pipe 921 are connected.
  • the valve device 1 increases or decreases the flow rate of the gas flowing into the intake passage 920 through the EGR passage 950.
  • the valve device 1 is electrically connected to the ECU 96.
  • the ECU 96 is configured of a CPU as an arithmetic unit, a microcomputer having a RAM and a ROM as a storage unit, and the like.
  • the ECU 96 controls the drive of the throttle 925 and the valve device 1 according to the driving condition of the vehicle or device on which the engine system 90 is mounted and the operation content of the operator operating the vehicle or device.
  • the valve device 1 is a rotary valve that can increase or decrease the degree of opening of a fluid passage by rotationally driving a cylindrical valve member.
  • the valve device 1 can increase or decrease the opening degree of the EGR passage 950 with respect to the intake passage 920.
  • the valve device 1 includes a valve housing 10, a valve member 20 as a "rotary body", an upper shaft 25 as a “shaft”, a lower shaft 26 as a “shaft”, two bearings 271 and 272, a "seal portion”
  • An oil seal 30, a drive unit 35, a gear unit 37 and the like are provided.
  • the valve housing 10 includes a casing 111, a sensor cover 112, a bottom cover 113, a cylindrical member 16, a housing side sealing member 17, and the like.
  • the casing 111 is formed to be able to receive the valve member 20 from a metal material such as aluminum.
  • the casing 111 forms a joining portion of the intake passage 920 and the EGR passage 950.
  • the casing 111 has a valve chamber 110 as a “communication space”, an upstream flow passage 12 as a “flow passage”, and a downstream flow as a “flow passage”. It has a passage 13 and an accommodation space 14 as a "flow passage”.
  • the valve chamber 110 is formed to be able to rotatably accommodate the valve member 20.
  • the upstream flow passage 12 is formed to communicate with the valve chamber 110.
  • the upstream side flow passage 12 communicates with the air cleaner 923.
  • the downstream flow passage 13 is formed to communicate with the valve chamber 110 separately from the upstream flow passage 12.
  • the downstream side flow passage 13 is formed coaxially with the upstream side flow passage 12.
  • the downstream flow passage 13 communicates with the intercooler 924.
  • the accommodation space 14 is formed to communicate with the valve chamber 110 separately from the upstream flow passage 12 and the downstream flow passage 13.
  • the accommodation space 14 is formed so as to be able to accommodate the cylindrical member 16 in which the housing-side seal member 17 is assembled.
  • the storage space 14 communicates with the EGR passage 950.
  • the casing 111 has a wall 114 forming a valve chamber 110, as shown in FIG.
  • the wall body 114 has a through hole 101 through which the upper shaft 25 is inserted.
  • a bearing 271 and an oil seal 30 are provided on the inner wall forming the through hole 101 of the wall body 114.
  • the bearing 271 rotatably supports the upper shaft 25.
  • the oil seal 30 prevents the gas in the valve chamber 110 from flowing out of the through hole 101 to the outside of the valve chamber 110. The detailed configuration of the oil seal 30 will be described later.
  • the sensor cover 112 is provided on the opposite side of the valve chamber 110 as viewed from the wall 114 of the casing 111.
  • the sensor cover 112 forms an accommodation space 370 capable of accommodating the drive unit 35, the gear unit 37, and the like together with the casing 111. That is, the valve chamber 110 and the housing space 370 are partitioned by the wall 114 of the casing 111.
  • the bottom cover 113 is provided on the side of the casing 111 opposite to the side on which the sensor cover 112 is provided.
  • the bottom cover 113 forms a valve chamber 110 together with the casing 111.
  • the bottom cover 113 has a through hole 102 into which the lower shaft 26 can be inserted.
  • a bearing 272 is provided on the inner wall of the bottom cover 113 forming the through hole 102.
  • the cylindrical member 16 is a member provided separately from the casing 111.
  • the cylindrical member 16 has a flange portion 161, a first side wall portion 162, and a second side wall portion 163.
  • the cylindrical member 16 is formed of stainless steel.
  • the flange portion 161 is a portion formed in a substantially annular shape.
  • the flange portion 161 abuts on a step surface 141 provided on the inner wall forming the accommodation space 14 as shown in FIGS.
  • the cylindrical member 16 is fixed to the casing 111 by press-fitting the annular ring 191 into the casing 111.
  • the ring 191 presses the flange portion 161 against the step surface 141 via the wave washer 192.
  • the first side wall portion 162 and the second side wall portion 163 are formed to extend along the axial direction of the flange portion 161 from the end face in contact with the step surface 141 of the flange portion 161.
  • the first side wall portion 162 and the second side wall portion 163 are formed to have the same shape as a part of the side wall of the cylinder.
  • the first side wall portion 162 and the second side wall portion 163 are formed to have a central angle of 180 degrees.
  • the first side wall portion 162 is formed such that the height extending in the axial direction of the flange portion 161 is lower than the height extending in the axial direction of the flange portion 161 of the second side wall portion 163.
  • the housing-side seal member 17 has a first covering portion 171, a first sealing lip portion 172, a second covering portion 173, and a second sealing lip portion 174.
  • the housing side sealing member 17 is formed in a substantially cylindrical shape from an elastic material such as rubber.
  • the first covering portion 171 is formed to cover the radially inner side, the radial outer side, and the end portion of the first side wall portion 162 opposite to the flange portion 161 side.
  • the first seal lip portion 172 is a lip-like portion provided at a portion covering the end portion of the first covering portion 171 opposite to the flange portion 161 side.
  • the first seal lip portion 172 is radially outward of the first side wall portion 162, that is, the flange portion 161. It is formed to project in the radially outward direction of.
  • the second covering portion 173 is a portion connected to the radially inner side and the radially outer side of the second side wall portion 163, the end opposite to the flange portion 161 side, and the first side wall portion 162 of the second side wall portion 163. It is formed to cover the end face of
  • the second seal lip portion 174 is a lip-like portion provided at a portion covering the end portion of the second covering portion 173 opposite to the flange portion 161 side.
  • the second seal lip portion 174 has a radially inward direction of the second side wall portion 163, that is, the flange portion 161. It is formed to project radially inward.
  • the valve member 20 has a valve member side seal portion 21, an upper arm 22, and a lower arm 23.
  • the valve member 20 is formed of a resin material having high heat resistance, such as polyphenylene sulfide.
  • the valve member 20 is accommodated in the valve chamber 110 and is provided so as to be rotatable relative to the valve housing 10 (see solid arrow R5 in FIG. 5 and solid arrow R6 in FIG. 6). ).
  • EGR passage blocking direction the direction of rotation from the state of FIG. 5 to the state of FIG. 6
  • the direction of rotation is referred to as "the EGR passage opening direction”.
  • the valve member side seal portion 21 is formed such that the outer wall surface 211 which can contact the housing side seal member 17 has the same shape as a part of the wall surface on the radially outer side of the cylinder.
  • the outer wall surface 211 has seal surfaces 212 and 213 and a connection seal surface 214, as shown in FIGS.
  • the seal surfaces 212 and 213 are formed on the outer wall surface 211 in the circumferential direction of the valve member side seal portion 21.
  • the seal surface 212 is formed on the outer wall surface 211 so as to be directed in the EGR passage blocking direction.
  • the seal surface 212 has the same shape as a part of the inner wall surface of the radially outer side wall of the cylinder.
  • the sealing surface 212 has a semi-cylindrical shape with a central angle of 180 degrees.
  • the sealing surface 212 is formed such that the radius is larger than the radius of the sealing surface 213.
  • the seal surface 213 is formed on the outer wall surface 211 so as to be directed in the EGR passage blocking direction.
  • the sealing surface 213 has the same shape as a part of the outer wall surface of the radially outer side wall of the cylinder.
  • the seal surface 213 has a semi-cylindrical shape with a central angle of 180 degrees.
  • the virtual cylindrical surface including the sealing surface 212 and the virtual cylindrical surface including the sealing surface 213 have a central axis coaxially. The central axis is orthogonal to the rotation axis RA20 of the valve member 20.
  • connection seal surface 214 is formed on the outer wall surface 211 so as to be directed in the EGR passage blocking direction.
  • the connection sealing surface 214 is formed to be orthogonal to the sealing surfaces 212 and 213. When translated, the normal to the connection seal surface 214 is orthogonal to the rotation axis RA20.
  • the rotation angle of the valve member 20 by controlling the rotation angle of the valve member 20, it is possible to increase / decrease the opening degree of the intake passage 920 as well as the opening degree of the EGR passage 950 with respect to the intake passage 920.
  • the magnitude of the negative pressure in the intake passage 920 can be controlled.
  • the air flows into the intake passage 920 by controlling the rotation angle of the valve member 20. It is possible to control the displacement.
  • the upper arm 22 is provided at an end of the valve member side seal portion 21 in the direction along the rotation axis RA 20 at an end on the sensor cover 112 side.
  • the upper arm 22 has an upper arm portion 221, an upper arm first fastening portion 222, and an upper arm second fastening portion 223 as a "second rotating portion".
  • the upper arm portion 221 is formed to extend in the direction from the end on the sensor cover 112 side of the valve member side seal portion 21 toward the rotation axis RA20 of the valve member 20, that is, inward in the radial direction of the substantially cylindrical valve member 20. It is an approximately fan-shaped part.
  • the upper arm first fastening portion 222 is a substantially annular portion provided at an end of the upper arm portion 221 on the rotation axis RA20.
  • the upper arm first fastening portion 222 has a through hole 224 into which the upper shaft 25 is press-fitted.
  • the upper arm first fastening portion 222 is formed to face the wall 114 of the casing 111 in the direction along the rotation axis RA20, as shown in FIGS.
  • the upper arm second fastening portion 223 is a substantially annular portion provided on the opposite side of the upper arm portion 221 of the upper arm first fastening portion 222.
  • the outer diameter of the upper arm second fastening portion 223 is smaller than the outer diameter of the upper arm first fastening portion 222.
  • the upper arm second fastening portion 223 has a through hole 225 into which the upper shaft 25 is press-fitted.
  • the boundary between the upper arm portion 221 and the upper arm first fastening portion 222, and the upper arm first fastening portion 222 and the upper arm second fastening portion 223 has two points. It shows with the dashed line VL11 and VL12.
  • the lower arm 23 is provided at an end of the valve member side seal portion 21 in the direction along the rotation axis RA 20 at an end on the bottom cover 113 side.
  • the lower arm 23 has a lower arm portion 231, a lower arm first fastening portion 232, and a lower arm second fastening portion 233.
  • the lower arm portion 231 is a substantially fan-shaped portion formed to extend from the end on the bottom cover 113 side of the valve member side seal portion 21 toward the rotation axis RA20 of the valve member 20.
  • the lower arm first fastening portion 232 is a substantially annular portion provided at an end of the lower arm portion 231 on the rotation axis RA20.
  • the lower arm first fastening portion 232 has a through hole 234 into which the lower shaft 26 is press-fitted.
  • the lower arm second fastening portion 233 is a substantially annular portion provided on the opposite side of the lower arm portion 231 of the lower arm first fastening portion 232.
  • the outer diameter of the lower arm second fastening portion 233 is smaller than the outer diameter of the lower arm first fastening portion 232.
  • the lower arm second fastening portion 233 has a through hole 235 into which the lower shaft 26 is press-fitted. In FIG.
  • the boundary between the lower arm portion 231 and the lower arm first fastening portion 232 and the lower arm first fastening portion 232 and the lower arm second fastening portion 233 is indicated by a two-dot chain line VL13. , VL14.
  • the upper shaft 25 is a substantially rod-like member formed of stainless steel.
  • the upper shaft 25 is rotatably provided integrally with the valve member 20 by being fastened to the upper arm first fastening portion 222 and the upper arm second fastening portion 223.
  • the upper shaft 25 is formed to extend from the end of the upper arm 22 on the rotation axis RA 20 in the direction opposite to the lower shaft 26, as shown in FIG.
  • the upper shaft 25 is inserted into the through hole 101 of the casing 111, and is rotatably supported by the bearing 271 while being inserted into the oil seal 30.
  • the lower shaft 26 is a substantially rod-like member formed of stainless steel.
  • the lower shaft 26 is rotatably provided integrally with the valve member 20 by being fastened to the lower arm first fastening portion 232 and the lower arm second fastening portion 233.
  • the lower shaft 26 is formed to extend from the end of the lower arm 23 on the rotation axis RA 20 in a direction opposite to the upper arm 22 as shown in FIG. 4.
  • the lower shaft 26 is inserted into the through hole 102 of the bottom cover 113 and rotatably supported by the bearing 272.
  • the lower shaft 26 is provided such that the upper shaft 25 and the rotation axis are coaxial.
  • the oil seal 30 has an outer pressing portion 31, an abutting portion 32, and an inner pressing portion 33.
  • the oil seal 30 is provided on the valve chamber 110 side of the bearing 271 on the inner wall forming the through hole 101 of the wall body 114.
  • the outer side pressing portion 31 is a member formed in a substantially cup shape from metal, and forms an outer shape of the oil seal 30. As shown in FIG. 7, the outer pressing portion 31 is provided such that the bottom portion 311 corresponding to the bottom of the cup is located on the bearing 271 side.
  • the bottom portion 311 has a through hole 312 through which the upper shaft 25 can be inserted.
  • the cylindrical portion 313 is a cylindrical portion formed so as to extend toward the valve chamber 110 from the radially outer side of the bottom portion 311.
  • the cylindrical portion 313 is in contact with the inner wall surface 115 as a “seal portion support wall surface” in which the radially outer outer wall surface 314 forms the through hole 101.
  • the contact portion 32 is a substantially flat plate-like member made of an elastic material, and is housed inside the outer side pressing portion 31. As shown in FIG. 7, the contact portion 32 is formed with a through hole 322 through which the upper shaft 25 can be inserted by the radially inner end portion 321. The end portion 321 is in contact with the radially outer surface 253 of the upper shaft 25. Thus, the gas in the valve chamber 110 is restricted from flowing from the valve chamber 110 toward the bearing 271 along the outer wall surface 253 of the upper shaft 25.
  • the inner pressing portion 33 is a member formed in a substantially cup shape from metal, and is housed inside the outer pressing portion 31. As shown in FIG. 7, the inner pressing portion 33 is provided such that the bottom portion 331 corresponding to the bottom of the cup is located on the bearing 271 side. The bottom portion 331 holds the contact portion 32 between itself and the bottom portion 311, and restricts the movement of the contact portion 32. The bottom portion 331 is formed with a through hole 332 through which the upper shaft 25 can be inserted.
  • the cylindrical portion 333 is a cylindrical portion formed so as to extend toward the valve chamber 110 from the radially outer side of the bottom portion 331. In the cylindrical portion 333, the radially outer outer wall surface 334 is in contact with the inner wall surface 315 of the cylindrical portion 313 of the outer pressing portion 31.
  • the oil seal 30 has a seal internal space 300 communicating with the valve chamber 110 on the valve chamber 110 side.
  • a portion constituting the upper shaft 25 a portion rotatably supported by the bearing 271 is referred to as an insertion portion 251, and a portion located in the seal inner space 300 is referred to as a first rotating portion.
  • a part of the radially outer surface 253 of the exposed portion 252 is exposed in the seal inner space 300.
  • the exposed portion 252 of the upper shaft 25 and a part of the upper arm second fastening portion 223 are located in the seal inner space 300.
  • a distance L11 between the radially outer outer wall surface 226 of the upper arm second fastening portion 223 and the radially inner inner wall surface 335 of the cylindrical portion 333 of the inner pressing portion 33 is equal to the outer wall surface 253 of the exposed portion 252
  • the distance L12 is shorter than the distance L12 with the inner wall surface 335 of the portion 33.
  • the distance L11 is defined by the inner wall surface 118 as the “housing side adjacent wall surface” of the wall 114 connected to the inner wall surface 115 and facing the valve member 20, and the upper arm first fastening portion 222 facing the inner wall surface 118. It is shorter than the distance L13 between it and the valve member side wall surface 227.
  • the driving unit 35 is, for example, a direct current motor having a sliding contact structure between a brush and a commutator.
  • the drive unit 35 is electrically connected to the ECU 96 through the connector 116 of the valve housing 10.
  • the driving unit 35 generates a driving force capable of rotating the valve member 20 under the control of the ECU 96.
  • the gear portion 37 has a plurality of gears, amplifies the torque of the drive portion 35 according to the reduction ratio, and transmits the amplified torque to the upper shaft 25.
  • the gear portion 37 has a pinion gear 371, an intermediate reduction gear 372, a small diameter gear 373, and a valve gear 374.
  • the pinion gear 371 is attached to the output shaft of the drive unit 35.
  • the intermediate reduction gear 372 meshes with the pinion gear 371.
  • the small diameter gear 373 is supported by the central axis common to the intermediate reduction gear 372 and rotates integrally with the intermediate reduction gear 372.
  • the valve gear 374 is provided to mesh with the small diameter gear 373.
  • the valve gear 374 has, for example, a larger outer diameter than the upper shaft 25 and rotates integrally with the upper shaft 25. Between the valve gear 374 and the casing 111, a return spring 39 is provided which biases the valve member 20 to rotate the valve member 20 in the EGR passage blocking direction.
  • the detection unit 38 has a magnet 381 and a Hall IC 382.
  • the magnet 381 is fixed to the valve gear 374 and rotates with the upper shaft 25 and the valve gear 374.
  • the Hall IC 382 is provided on the sensor cover 112.
  • the Hall IC 382 outputs an electrical signal corresponding to the magnetic flux density of the magnetic field generated by the magnet 381 to the ECU 96 through the connector 116.
  • the ECU 96 performs feedback control of the energization amount of the drive unit 35 such that the rotation angle of the valve member 20 detected by the detection unit 38 matches the target value.
  • the target value of the rotation angle is set according to the operating state of the engine system 90.
  • the gas of the valve chamber 110 passes between the outer wall surface 226 of the upper arm second fastening portion 223 and the inner wall surface 335 of the inner pressing portion 33, and the outer wall surface of the exposed portion 252 Intrudes between the upper surface 25 of the through hole 101 and the wall body 114 between the inner wall portion 335 of the inner pressing portion 33 and the upper shaft 25 of the through hole 101.
  • the distance L11 between the outer wall surface 226 of the upper arm second fastening portion 223 and the inner wall surface 335 of the inner pressing portion 33 is the distance L12 between the outer wall surface 253 of the exposed portion 252 and the inner wall surface 335 of the inner pressing portion 33. It is shorter than.
  • the gas in the valve chamber 110 is less likely to intrude between the exposed portion 252 of the seal inner space 300 and the inner pressing portion 33 or between the upper shaft 25 of the through hole 101 and the wall body 114.
  • the length in the direction along the rotation axis RA20 of 114 can be shortened.
  • the upper arm second fastening portion 223 is located in the seal inner space 300, the length of the valve housing 10 in the direction along the rotation axis RA20 can be shortened. Therefore, the valve device 1 can reduce the physique in the direction along the rotation axis RA20 while reducing the gas leakage in the valve chamber 110.
  • the distance L11 is longer than the distance L13 between the inner wall surface 118 of the wall body 114 and the valve member side wall surface 227 of the upper arm first fastening portion 222.
  • the gas flowing between the inner wall surface 118 of the wall body 114 and the valve member side wall surface 227 of the upper arm second fastening portion 223 is narrowed outside the upper arm second fastening portion 223.
  • valve device 1 can further reduce the gas leakage of the valve chamber 110.
  • the second embodiment differs from the first embodiment in the shapes of the inner wall surfaces of the valve housing facing the upper arm first fastening portion and the upper arm first fastening portion of the valve member.
  • symbol is attached
  • the valve device 2 includes a valve housing 10, a valve member 40 as a "rotary body", an upper shaft 25, a lower shaft 26, two bearings 271, 272, an oil seal 45 as a "sealing portion" A unit 35, a gear unit 37, etc.
  • the valve member 40 has a valve member side seal portion 21, an upper arm 42, and a lower arm 23.
  • the valve member 40 is formed of a resin material having high heat resistance, for example, polyphenylene sulfide, and is provided so as to be rotatable relative to the valve housing 10 in the valve chamber 110.
  • the upper arm 42 is provided at an end portion of the valve member side seal portion 21 in the direction along the rotation axis RA 40 at an end portion on the sensor cover 112 side.
  • the upper arm 42 includes an upper arm portion 221, an upper arm first fastening portion 422, and an upper arm second fastening portion 223.
  • the upper arm first fastening portion 422 is a substantially annular portion provided at an end of the valve member 40 of the upper arm portion 221 on the rotation axis RA40.
  • the upper arm first fastening portion 422 has a through hole 424 into which the upper shaft 25 is press-fitted. As shown in FIG. 8, the upper arm first fastening portion 422 is formed to face the wall 114 of the casing 111 in the direction along the rotation axis RA40.
  • the upper arm first fastening portion 422 has a concave space 420 as a “valve member side concave space” on the valve member side wall surface 425 facing the inner wall surface 118. In FIG.
  • the boundary between the upper arm portion 221 and the upper arm first fastening portion 422 and the upper arm first fastening portion 422 and the upper arm second fastening portion 223 is indicated by a two-dot chain line VL21. , VL22.
  • the oil seal 45 has an outer pressing portion 46, an abutting portion 32, and an inner pressing portion 48.
  • the oil seal 45 is provided on the valve chamber 110 side of the bearing 271 on the inner wall forming the through hole 101 of the wall body 114.
  • the outer pressing portion 46 is a member formed in a substantially cup shape from metal, and forms the outer shape of the oil seal 45. As shown in FIG. 8, the outer pressing portion 46 is provided so that the bottom portion 461 is located on the bearing 271 side.
  • the bottom portion 461 has a through hole 462 through which the upper shaft 25 can be inserted.
  • the cylindrical portion 463 is a cylindrical portion that is formed to extend from the radial outer side of the bottom portion 461 toward the valve chamber 110. In the cylindrical portion 463, the radially outer outer wall surface 464 is in contact with the inner wall surface 115.
  • the end 465 opposite to the bottom 461 of the cylindrical portion 463 is located in the concave space 420, as shown in FIG.
  • the inner pressing portion 48 is a member formed in a substantially cup shape from metal, and is accommodated inside the outer pressing portion 46. As shown in FIG. 8, the inner pressing portion 48 is provided so that the bottom portion 481 is positioned on the bearing 271 side. The bottom portion 481 sandwiches the contact portion 32 with the bottom portion 461 to restrict the movement of the contact portion 32. The bottom portion 481 has a through hole 482 through which the upper shaft 25 can be inserted.
  • the cylindrical portion 483 is a cylindrical portion formed so as to extend toward the valve chamber 110 from the radial outer side of the bottom portion 481. A radially outer wall 484 of the cylindrical portion 483 is in contact with an inner wall surface 466 of the cylindrical portion 463 of the outer pressing portion 46.
  • the end 485 opposite to the bottom 481 side of the cylindrical portion 483 is located in the concave space 420, as shown in FIG.
  • the oil seal 45 has a seal internal space 450 communicating with the valve chamber 110 on the valve chamber 110 side.
  • the wall 114 of the casing 111 has a projection 117 on the valve chamber 110 side. Specifically, the projection 117 is formed to project from the inner wall surface 118 of the wall 114 toward the valve chamber 110.
  • the protrusion 117 is formed to be adjacent to the cylindrical portion 463 of the outer pressing portion 46. The protrusion 117 is located in the concave space 420 together with the end 465 of the outer pressing portion 46 and the end 485 of the inner pressing portion 48.
  • the exposed portion 252 of the upper shaft 25 and a part of the upper arm second fastening portion 223 are located in the seal inner space 450.
  • a distance L21 between the outer wall surface 226 of the upper arm second fastening portion 223 and the radially inner wall surface 486 of the inner pressing portion 48 is the distance between the outer wall surface 253 of the exposed portion 252 and the inner wall surface 486 of the inner pressing portion 48.
  • the distance L22 is shorter than the distance L22. Further, the distance L21 is longer than the distance L23 between the inner wall surface 118 of the wall body 114 and the valve member side wall surface 425 of the upper arm first fastening portion 422.
  • the valve device 2 according to the second embodiment has the same effect as the first embodiment.
  • the end 465 of the outer pressing portion 46, the end 485 of the inner pressing portion 48, and the protrusion 117 are located in the concave space 420.
  • the gas in the valve chamber 110 meanders even if it flows along the upper arm 42 and is less likely to flow into the seal inner space 450. Therefore, in the valve device 2 according to the second embodiment, since the gas in the valve chamber 110 is less likely to intrude into the seal inner space 450, the occurrence of the sliding failure can be prevented.
  • the third embodiment differs from the second embodiment in the shapes of the inner wall surfaces of the valve housing facing the upper arm first fastening portion of the valve member and the upper arm first fastening portion.
  • symbol is attached
  • the valve device 3 includes a valve housing 10, a valve member 50, an upper shaft 25, a lower shaft 26, two bearings 271, 272, an oil seal 45, a drive unit 35, a gear unit 37, and the like.
  • the valve member 50 has a valve member side seal portion 21, an upper arm 52, and a lower arm 23.
  • the valve member 50 is formed of a resin material having high heat resistance, for example, polyphenylene sulfide, and is provided in the valve chamber 110 so as to be rotatable relative to the valve housing 10.
  • the upper arm 52 is provided on the sensor cover 112 side in the axial end of the valve member side seal portion 21.
  • the upper arm 52 includes an upper arm portion 221, an upper arm first fastening portion 522, and an upper arm second fastening portion 223.
  • the upper arm first fastening portion 522 is a substantially annular portion provided at an end of the valve member 50 of the upper arm portion 221 on the rotation axis RA50.
  • the upper arm first fastening portion 522 has a through hole 524 into which the upper shaft 25 is press-fitted. As shown in FIG. 9, the upper arm first fastening portion 522 is formed to face the wall 114 of the casing 111 in the direction along the rotation axis RA50.
  • the upper arm first fastening portion 522 has concave spaces 420 and 520 as a “valve member side concave space” on the valve member side wall surface 525 opposed to the wall body 114.
  • the concave space 520 is located farther from the concave space 420 when viewed from the rotation axis RA50.
  • the boundary between the upper arm portion 221 and the upper arm first fastening portion 522, and the upper arm first fastening portion 522 and the upper arm second fastening portion 223 is indicated by a two-dot chain line VL31. , VL 32.
  • the wall 114 of the casing 111 has two projections 117 and 119 on the valve chamber 110 side. Specifically, the projections 117 and 119 are formed to project from the inner wall surface 118 toward the valve chamber 110.
  • the protrusion 119 is located on the side farther from the rotation axis RA 50 than the protrusion 117.
  • the protrusion 119 is located in the concave space 520.
  • the distance L33 between the inner wall surface 118 of the wall body 114 and the valve member side wall surface 525 of the upper arm first fastening portion 522 is longer than the distance L21.
  • the valve device 3 according to the third embodiment has the same effect as the first embodiment. Further, in the valve device 3, the valve member 50 has two concave spaces 420 and 520. The end portion 465 of the outer pressing portion 46, the end portion 485 of the inner pressing portion 48, and the protrusion 117 are located in the recessed space 420, and the protrusion 119 is located in the recessed space 520. As a result, the gas in the valve chamber 110 meanders even if it flows along the upper arm 52 and is less likely to flow into the seal inner space 450. Therefore, in the valve device 3 according to the third embodiment, the gas in the valve chamber 110 is more difficult to intrude into the in-seal space 450, so that the occurrence of the sliding failure can be further prevented.
  • the fourth embodiment differs from the first embodiment in the shape of the upper arm second fastening portion of the valve member.
  • symbol is attached
  • the valve device 4 includes a valve housing 10, a valve member 60 as a "rotating member", an upper shaft 25, a lower shaft 26, two bearings 271, 272, an oil seal 30, a drive portion 35, and a gear portion 37. Etc.
  • the valve member 60 has a valve member side seal portion 21, an upper arm 62, and a lower arm 23.
  • the valve member 60 is formed of a resin material having high heat resistance, for example, polyphenylene sulfide, and is provided so as to be rotatable relative to the valve housing 10 in the valve chamber 110.
  • the upper arm 62 is provided at an end of the valve member side seal portion 21 in the direction along the rotation axis RA60 at an end on the sensor cover 112 side.
  • the upper arm 62 includes an upper arm portion 221, an upper arm first fastening portion 222, and an upper arm second fastening portion 623.
  • the upper arm second fastening portion 623 is a substantially annular portion provided on the opposite side of the upper arm portion 221 of the upper arm first fastening portion 222.
  • the outer diameter of the upper arm second fastening portion 623 is smaller than the outer diameter of the upper arm first fastening portion 222.
  • the upper arm second fastening portion 623 has a through hole 625 into which the upper shaft 25 is press-fitted.
  • VL11 the boundary between the upper arm portion 221 and the upper arm first fastening portion 222, and the upper arm first fastening portion 222 and the upper arm second fastening portion 623 is indicated by a two-dot chain line VL11. , VL 42.
  • the upper arm second fastening portion 623 has a projection 627 as a “rotor projection” on the end surface 624 on the bearing 271 side.
  • the protrusion 627 is formed to extend from the end surface 624 in the direction opposite to the valve chamber 110.
  • the exposed portion 252 of the upper shaft 25 and a part of the upper arm second fastening portion 623 are located in the seal inner space 300.
  • a distance L41 between the radially outer outer wall surface 626 of the upper arm second fastening portion 623 and the inner wall surface 335 of the inner pressing portion 33 is the distance between the outer wall surface 253 of the exposed portion 252 and the inner wall surface 335 of the inner pressing portion 33. It is shorter than the distance L42. Further, the distance L41 is longer than the distance L13 between the inner wall surface 118 of the wall body 114 and the valve member side wall surface 227 of the upper arm first fastening portion 222.
  • valve device 4 according to the fourth embodiment has the same effect as that of the first embodiment. Further, in the valve device 4, the valve member 60 has a protrusion 627 formed to extend in the seal inner space 300 in the direction opposite to the valve chamber 110. As a result, the gas flowing into the seal inner space 300 meanders in the seal inner space 300, and therefore, it is difficult for the gas to flow between the oil seal 30 and the upper shaft 25. Therefore, the valve device 4 according to the fourth embodiment can prevent the occurrence of the sliding failure.
  • the fifth embodiment differs from the third embodiment in the shape of the upper arm second fastening portion of the valve member.
  • the same reference numerals as in the third embodiment denote the same parts, and a description thereof will be omitted.
  • the valve device 5 includes a valve housing 10, a valve member 70 as a "rotating member", an upper shaft 25, a lower shaft 26, two bearings 271 and 272, an oil seal 45, a drive portion 35, and a gear portion 37. Etc.
  • the valve member 70 has a valve member side seal portion 21, an upper arm 72, and a lower arm 23.
  • the valve member 70 is formed of a resin material having high heat resistance, for example, polyphenylene sulfide, and is provided rotatably in the valve chamber 110 relative to the valve housing 10.
  • the upper arm 72 is provided at an end of the valve member side seal portion 21 in the direction along the rotation axis RA 70 at an end on the sensor cover 112 side.
  • the upper arm 72 includes an upper arm portion 221, an upper arm first fastening portion 522, and an upper arm second fastening portion 723.
  • the upper arm second fastening portion 723 is a substantially annular portion provided on the opposite side of the upper arm portion 221 of the upper arm first fastening portion 522.
  • the outer diameter of the upper arm second fastening portion 723 is smaller than the outer diameter of the upper arm first fastening portion 522.
  • the upper arm second fastening portion 723 has a through hole 725 through which the upper shaft 25 is press-fitted.
  • the boundary between the upper arm portion 221 and the upper arm first fastening portion 522, and the upper arm first fastening portion 522 and the upper arm second fastening portion 723 is indicated by a two-dot chain line VL51. , VL 52.
  • the upper arm second fastening portion 723 has a projection 727 as a “rotor projection” on the end surface 724 on the bearing 271 side.
  • the protrusion 727 is formed to extend from the end surface 724 in the direction opposite to the valve chamber 110.
  • the exposed portion 252 of the upper shaft 25 and a part of the upper arm second fastening portion 723 are located in the seal inner space 450.
  • a distance L51 between the radially outer outer wall surface 726 of the upper arm second fastening portion 723 and the inner wall surface 486 of the inner pressing portion 48 is the distance between the outer wall surface 253 of the exposed portion 252 and the inner wall surface 486 of the inner pressing portion 48. It is shorter than the distance L52. Further, the distance L51 is longer than the distance L33 between the inner wall surface 118 of the wall body 114 and the valve member side wall surface 525 of the upper arm first fastening portion 522.
  • valve device 5 has the same effect as that of the first embodiment.
  • the valve member 70 includes the end 465 of the outer pressing portion 46, the end 485 of the inner pressing portion 48 and the concave space 420 where the projection 117 is located, and the concave where the projection 119 is located. There is a space 520. Also, the valve member 70 has a projection 727 formed to extend in the seal inner space 450 in the opposite direction to the valve chamber 110.
  • valve device 5 can further prevent the occurrence of the sliding failure.
  • valve device differs from the first embodiment in the shape of the valve member and the shape of the upper shaft.
  • symbol is attached
  • the valve device 6 includes a valve housing 10, a valve member 80 as a "rotating member", an upper shaft 85, a lower shaft 26, two bearings 271, 272, an oil seal 30, a drive portion 35, and a gear portion 37. Etc.
  • the valve member 80 has a valve member side seal portion 21, an upper arm 82, and a lower arm 23.
  • the valve member 80 is formed of a resin material having high heat resistance, for example, polyphenylene sulfide, and is provided rotatably in the valve chamber 110 relative to the valve housing 10
  • the upper arm 82 is provided at an end of the valve member side seal portion 21 in the direction along the rotation axis RA 80 at an end on the sensor cover 112 side.
  • the upper arm 22 has an upper arm portion 221 and an upper arm fastening portion 822.
  • the upper arm fastening portion 822 is a substantially annular portion provided at an end of the valve member 80 of the upper arm portion 221 on the rotation axis RA80.
  • the upper arm fastening portion 822 has a through hole 824 into which the upper shaft 85 is press-fitted.
  • the upper arm fastening portion 822 is formed to face the wall 114 of the casing 111 in the direction along the rotation axis RA80, as shown in FIG. In FIG. 12, for convenience, a boundary between the upper arm portion 221 and the upper arm fastening portion 822 is indicated by a two-dot chain line VL61.
  • the upper shaft 85 is a substantially rod-like member formed of stainless steel.
  • the upper shaft 85 is rotatably provided integrally with the valve member 80 by being fastened to the upper arm fastening portion 822.
  • the upper shaft 85 is formed to extend from the end of the upper arm 82 on the rotation axis RA 80 in the direction opposite to the lower shaft 26, as shown in FIG.
  • the upper shaft 85 is inserted into the through hole 101 of the casing 111 and rotatably supported by the bearing 271.
  • the upper shaft 85 has an insertion portion 851, an exposed portion 852 as a “first rotation portion”, and a large diameter portion 853 as a “second rotation portion”.
  • the insertion portion 851 is a portion located in the bearing 271.
  • the exposed portion 852 is a portion provided on the valve chamber 110 side of the insertion portion 851 and located in the seal inner space 300.
  • a part of the radially outer surface 854 of the exposed portion 852 is exposed in the seal inner space 300.
  • the large diameter portion 853 is a portion provided on the valve chamber 110 side of the exposed portion 852 and located in the seal inner space 300.
  • the large diameter portion 853 is formed such that the outer diameter is larger than the outer diameter of the exposed portion 852.
  • the large diameter portion 853 is fastened to the upper arm fastening portion 822. Thereby, the upper shaft 85 and the valve member 80 can be integrally rotated.
  • the boundary between the exposed portion 852 and the large diameter portion 853 is indicated by a two-dot chain line VL62
  • the distance L61 between the radially outer outer wall surface 855 of the large diameter portion 853 and the inner wall surface 335 of the inner pressing portion 33 is the outer wall surface 854 of the exposed portion 852 and the inner wall surface of the inner pressing portion 33. It is shorter than the distance L62 between it and 335. Further, the distance L61 is shorter than the distance L63 between the inner wall surface 118 and the valve member side wall surface 825 of the upper arm fastening portion 822 opposed to the inner wall surface 118.
  • the distance L61 between the outer wall surface 855 of the large diameter portion 853 and the inner wall surface 335 of the inner pressing portion 33 in the seal inner space 300 is the distance between the outer wall surface 854 of the exposed portion 852 and the inner pressing portion 33.
  • the distance L62 to the inner wall surface 335 is shorter than the distance L62.
  • the distance L61 is shorter than the distance L63 between the inner wall surface 118 and the valve member side wall surface 825 of the upper arm fastening portion 822 opposed to the inner wall surface 118.
  • the gas flowing between the inner wall surface 118 of the wall 114 and the valve member side wall surface 825 of the upper arm fastening portion 822 is between the outer wall surface 855 of the large diameter portion 853 and the inner wall surface 335 of the inner pressing portion 33 As it flows in, the flow velocity decreases. Thereby, the gas of the valve chamber 110 is inserted between the outer wall surface 854 of the exposed portion 852 of the seal inner space 300 and the inner wall surface 335 of the inner pressing portion 33 or into the through hole 101. It becomes difficult to invade between. Therefore, the valve device 6 according to the sixth embodiment has the same effect as the first embodiment.
  • valve device controls the flow of the exhaust as "fluid".
  • the fluid is not limited to this.
  • the “rotor protrusion” of the fifth embodiment may be applied to the second embodiment.
  • valve housing and the oil seal have a portion that protrudes into the valve chamber, and the valve member has a concave space in which the protruding portion is located.
  • the relationship between the protruding portion and the concave space is not limited to this.
  • FIG. 13 shows a modification of the second embodiment.
  • the valve device 7 shown in FIG. 13 includes a valve housing 10, a valve member 20, an upper shaft 25, a lower shaft 26, two bearings 271, 272, an oil seal 30, a drive unit 35, a gear unit 37, and the like.
  • the upper arm first fastening portion 222 of the valve member 20 has a protrusion 228 as a “valve member side protrusion” on the valve member side wall surface 227 facing the wall body 114.
  • the projection 228 is formed to extend in the direction from the valve member side wall surface 227 toward the wall 114.
  • the wall 114 of the casing 111 is formed with a concave space 120 as a “housing side concave space”.
  • the concave space 120 is formed on the inner wall surface 118 of the wall 114.
  • the protrusion 228 is located in the concave space 120.
  • the gas in the valve chamber 110 flows along the upper arm 42 and is meandered by the projections 228 in the concave space 120, so it is difficult to flow into the seal inner space 300.
  • the modification shown in FIG. 13 has the same effect as that of the second embodiment.
  • the combination of the plurality of projections and the concave space of the third embodiment may be applied, or the rotor projection of the fifth embodiment may be applied.
  • the combination of the protrusion and the concave space of the second embodiment, the combination of the plurality of protrusions and the concave space of the third embodiment, and the rotor protrusion of the fifth embodiment may be applied to the sixth embodiment. .
  • this indication is not limited to such an embodiment, and can be carried out with various forms in the range which does not deviate from the gist.

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

Abstract

Provided is a valve device comprising: a valve housing (10) having a communication space (110); a rotating body (20, 25, 26, 40, 50, 60, 70, 80, 85) provided in the communication space; a bearing (271) that is provided to a wall body (114) of the valve housing, the wall body (114) forming a through hole (101), and that rotatably supports the rotating body; and a sealing portion (30, 45) having a sealing inner space (300, 450) provided to the bearing on the communication space side in an inner wall forming the through hole of the wall body. The rotating body has a first rotating portion (252, 852) located in the sealing inner space and a second rotating portion (223, 853) provided to the first rotating portion on the communication space side. A distance (L11, L21, L41, L51, L61) between an outer wall surface (226, 626, 726, 855) of the second rotating portion and an inner wall surface (335, 486) of the sealing portion is shorter than a distance (L12, L22, L42, L52, L62) between an outer wall surface (253, 854) of the first rotating portion and the inner wall surface of the sealing portion.

Description

弁装置Valve device 関連出願の相互参照Cross-reference to related applications
　本出願は、２０１７年９月５日に出願された特許出願番号２０１７－１７０２４４号に基づくものであり、ここにその記載内容を援用する。 This application is based on patent application number 2017-170244 filed on Sep. 5, 2017, the contents of which are incorporated herein by reference.
　本開示は、弁装置に関する。 The present disclosure relates to a valve device.
　従来、流体を流通可能な流路上に設けられ、当該流体の流れを制御可能な弁装置が知られている。弁装置は、流路を有する弁ハウジング、及び、弁ハウジング内において回転可能な弁部材を有する。例えば、特許文献１には、弁ハウジング、弁部材、弁ハウジングが有する壁体を挟んで流路とは反対側に設けられ弁部材の回転角度を検出可能な回転角センサ、及び、弁部材と一体に回転可能に設けられ弁ハウジングが有する通孔に挿通されているシャフトを備える弁装置が記載されている。 BACKGROUND Conventionally, a valve device is known that is provided on a flow path through which fluid can flow and that can control the flow of the fluid. The valve device has a valve housing having a flow path, and a valve member rotatable in the valve housing. For example, in Patent Document 1, a valve housing, a valve member, a rotation angle sensor provided on the opposite side to a flow path across a wall body of the valve housing and capable of detecting a rotation angle of the valve member; A valve arrangement is described which comprises a shaft which is integrally rotatably mounted and which is passed through a through hole of the valve housing.
特開２０１５－５９４９１号公報JP 2015-59491 A
　特許文献１に記載の弁装置は、通孔に設けられシャフトを回転可能に支持する軸受、及び、通孔に侵入する流体が回転角センサまで流れないよう通孔における液密を維持するシール部を有する。特許文献１に記載の弁装置では、通孔を形成し軸受及びシール部を支持する弁ハウジングの壁体は、シャフトの回転軸に沿う方向の長さが比較的長くなるよう形成されている。これにより、当該壁体の通孔を形成する内壁面とシャフトの外壁面との間の比較的狭い隙間によって流体を流れにくくしているが、壁体の長さが長くなると弁装置の体格が大きくなる。 The valve device described in Patent Document 1 includes a bearing provided in a through hole and rotatably supporting a shaft, and a seal portion in the through hole maintaining fluid tightness so that fluid entering the through hole does not flow to the rotation angle sensor. Have. In the valve device described in Patent Document 1, the wall of the valve housing which forms the through hole and supports the bearing and the seal portion is formed such that the length in the direction along the rotation axis of the shaft is relatively long. Although this makes it difficult for the fluid to flow by the relatively narrow gap between the inner wall surface forming the through hole of the wall and the outer wall surface of the shaft, when the length of the wall increases, the size of the valve device growing.
　本開示は、上述の点に鑑みてなされたものであり、その目的は、流体の漏れを防止しつつ体格を小さくすることが可能な弁装置を提供することにある。 This indication is made in view of the above-mentioned point, and the object is to provide a valve device which can make a physique small, preventing a fluid leak.
　本開示の弁装置は、弁ハウジング、回転体、軸受、及び、シール部を備える。 The valve device of the present disclosure includes a valve housing, a rotating body, a bearing, and a seal portion.
　弁ハウジングは、流体を流通可能な複数の流路、及び、複数の流路を連通する連通空間を有する。 The valve housing has a plurality of flow paths through which fluid can flow, and a communication space communicating the plurality of flow paths.
　回転体は、連通空間に弁ハウジングに対して相対回転可能に設けられる。回転体は、複数の流路の一の流路と連通空間とを連通する開口の縁部に当接すると一の流路と連通空間とを遮断可能である。 The rotating body is provided in the communication space so as to be rotatable relative to the valve housing. The rotary body is capable of blocking one flow passage and the communication space when the rotary body abuts on an edge of an opening that communicates the one flow passage of the plurality of flow passages and the communication space.
　軸受は、回転体の一部が挿通される通孔を形成する弁ハウジングの壁体に設けられる。軸受は、回転体を回転可能に支持する。 The bearing is provided on the wall of the valve housing which forms a through hole through which a part of the rotating body is inserted. The bearing rotatably supports the rotating body.
　シール部は、壁体の通孔を形成する内壁において軸受の連通空間側に設けられる。シール部は、連通空間側に連通空間に連通するシール内空間を有する。 The seal portion is provided on the communication space side of the bearing on the inner wall forming the through hole of the wall. The seal portion has a seal inner space communicating with the communication space on the communication space side.
　本開示の弁装置では、回転体は、シール内空間に位置する第一回転部、及び、第一回転部の連通空間側に設けられシール内空間に位置する第二回転部を有する。第二回転部の径方向外側の外壁面とシール内空間を形成するシール部の径方向内側の内壁面との間の距離は、第一回転部の径方向外側の外壁面とシール部の内壁面との間の距離に比べ短い。 In the valve device of the present disclosure, the rotary body has a first rotary portion located in the seal inner space, and a second rotary portion provided on the communication space side of the first rotary portion and positioned in the seal inner space. The distance between the radially outer outer wall surface of the second rotary portion and the radially inner inner wall surface of the seal portion forming the in-seal space is the distance between the radially outer outer wall surface of the first rotary portion and the seal portion It is shorter than the distance to the wall.
　本開示の弁装置では、連通空間の流体は、第二回転部の外壁面とシール部の内壁面との間を通って、第一回転部の外壁面とシール部の内壁面との間や通孔に挿通されている回転体の一部と壁体との間に侵入する場合がある。第二回転部の外壁面とシール部の内壁面との間の距離は、第一回転部の外壁面とシール部の内壁面との間の距離に比べ短くなっている。これにより、連通空間の流体は、シール内空間の第一回転部の外壁面とシール部の内壁面との間や通孔に挿通されている回転体の一部と壁体との間に侵入しにくくなるため、回転体の回転軸に沿う方向の壁体の長さを短くすることができる。また、第二回転部は、シール内空間に位置しているため、回転体の回転軸に沿う方向の弁ハウジングの長さを短くすることができる。したがって、本開示の弁装置は、流体の漏れを低減しつつ、回転体の回転軸に沿う方向の体格を小さくすることができる。 In the valve device of the present disclosure, the fluid in the communication space passes between the outer wall surface of the second rotating portion and the inner wall surface of the seal portion, and between the outer wall surface of the first rotating portion and the inner wall surface of the seal portion There may be a case where a part of the rotating body inserted in the through hole and the wall are intruded. The distance between the outer wall surface of the second rotating portion and the inner wall surface of the seal portion is shorter than the distance between the outer wall surface of the first rotating portion and the inner wall surface of the seal portion. Thereby, the fluid in the communication space intrudes between the wall surface and the wall surface of the first rotary portion of the seal inner space and the inner wall surface of the seal portion, or between a portion of the rotating body inserted through the through hole. Since it becomes difficult to do so, the length of the wall in the direction along the rotation axis of the rotating body can be shortened. In addition, since the second rotating portion is located in the seal inner space, the length of the valve housing in the direction along the rotation axis of the rotating body can be shortened. Therefore, the valve device of the present disclosure can reduce the body size in the direction along the rotation axis of the rotating body while reducing fluid leakage.
　本開示についての上記目的及びその他の目的、特徴や利点は、添付の図面を参照しながら下記の詳細な技術により、より明確になる。その図面は、
図１は、第一実施形態による弁装置を適用するエンジンシステムの模式図であり、 図２は、第一実施形態による弁装置の外観図であり、 図３は、図２のＩＩＩ矢視図であり、 図４は、図３のＩＶ－ＩＶ線断面図であり、 図５は、第一実施形態による弁装置のＥＧＲ通路と弁室とが連通しているときの断面図であり、 図６は、第一実施形態による弁装置のＥＧＲ通路と弁室とが遮断されているときの断面図であり、 図７は、図４のＶＩＩ矢視部分の拡大図であり、 図８は、第二実施形態による弁装置の部分拡大図であり、 図９は、第三実施形態による弁装置の部分拡大図であり、 図１０は、第四実施形態による弁装置の部分拡大図であり、 図１１は、第五実施形態による弁装置の部分拡大図であり、 図１２は、第六実施形態による弁装置の部分拡大図であり、 図１３は、他の実施形態による弁装置の部分拡大図である。 The above object and other objects, features and advantages of the present disclosure will be made more clear by the following detailed technology with reference to the attached drawings. The drawing is
FIG. 1 is a schematic view of an engine system to which a valve device according to a first embodiment is applied, FIG. 2 is an external view of the valve device according to the first embodiment, FIG. 3 is a view on arrow III in FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. FIG. 5 is a cross-sectional view when the EGR passage and the valve chamber of the valve device according to the first embodiment are in communication with each other, FIG. 6 is a cross-sectional view when the EGR passage and the valve chamber of the valve device according to the first embodiment are shut off, 7 is an enlarged view of a VII arrow part of FIG. 4; Fig. 8 is a partially enlarged view of the valve device according to the second embodiment, FIG. 9 is a partially enlarged view of the valve device according to the third embodiment, FIG. 10 is a partially enlarged view of a valve device according to a fourth embodiment, FIG. 11 is a partially enlarged view of the valve device according to the fifth embodiment, Fig. 12 is a partially enlarged view of the valve device according to the sixth embodiment, FIG. 13 is a partially enlarged view of a valve device according to another embodiment.
　以下、複数の実施形態を図面に基づいて説明する。なお、これらの複数の実施形態は、具体例を開示するものであり、本開示がこれらの実施形態に限定されないことは言うまでもない。 Hereinafter, a plurality of embodiments will be described based on the drawings. It is needless to say that the plurality of embodiments disclose specific examples, and the present disclosure is not limited to these embodiments.
　（第一実施形態）
　第一実施形態による弁装置１を図１～図７に基づいて説明する。弁装置１は、燃料を燃焼することによって駆動力を発生するエンジンシステム９０に適用される。
　最初に、図１を用いてエンジンシステム９０を説明する。エンジンシステム９０は、エンジン９１、吸気系９２、排気系９３、過給器９４、排気還流系９５などを備えている。なお、エンジン９１は、シリンダ９１１内にピストン９１２を収容して燃焼室９１０を形成する周知の構造である。 First Embodiment
A valve device 1 according to a first embodiment will be described based on FIGS. 1 to 7. The valve device 1 is applied to an engine system 90 that generates a driving force by burning a fuel.
First, an engine system 90 will be described with reference to FIG. The engine system 90 includes an engine 91, an intake system 92, an exhaust system 93, a supercharger 94, an exhaust gas recirculation system 95, and the like. The engine 91 is a known structure in which a piston 912 is accommodated in a cylinder 911 to form a combustion chamber 910.
　吸気系９２は、外気からエンジン９１に空気を供給する。吸気系９２は、吸気管９２１、吸気マニホールド９２２、エアクリーナ９２３、インタークーラ９２４、及び、スロットル９２５などを有する。以下、エンジン９１に供給される空気を吸入空気と呼ぶ。 The intake system 92 supplies air to the engine 91 from the outside air. The intake system 92 includes an intake pipe 921, an intake manifold 922, an air cleaner 923, an intercooler 924, a throttle 925, and the like. Hereinafter, the air supplied to the engine 91 is referred to as intake air.
　吸気管９２１は、燃焼室９１０に吸入空気を導くための配管であり、吸気通路９２０を有する。吸気管９２１の一端は、外気に開放され、他端は、吸気マニホールド９２２に接続されている。
　吸気マニホールド９２２は、吸気管９２１の他端とエンジン９１とに接続されている。吸気マニホールド９２２は、シリンダ９１１の数と同数の通路に分岐する構造を有する。
　エアクリーナ９２３は、大気から取り込んだ空気から異物を除去する。
　インタークーラ９２４は、過給器９４のコンプレッサ９４１により圧縮されて昇温した吸入空気を冷却する。
　スロットル９２５は、エンジン９１の吸気量を調整する。スロットル９２５は、電子制御ユニット（以下、「ＥＣＵ」という）９６と電気的に接続されている。 The intake pipe 921 is a pipe for guiding the intake air to the combustion chamber 910, and has an intake passage 920. One end of the intake pipe 921 is opened to the outside air, and the other end is connected to the intake manifold 922.
The intake manifold 922 is connected to the other end of the intake pipe 921 and the engine 91. The intake manifold 922 has a structure that branches into the same number of passages as the number of cylinders 911.
The air cleaner 923 removes foreign matter from air taken in from the atmosphere.
The intercooler 924 cools the intake air compressed and heated by the compressor 941 of the turbocharger 94.
The throttle 925 adjusts the intake amount of the engine 91. The throttle 925 is electrically connected to an electronic control unit (hereinafter referred to as "ECU") 96.
　排気系９３は、エンジン９１が排出する排気を外気へ放出する。排気系９３は、排気管９３１、排気マニホールド９３２、及び、排気浄化ユニット９３３を有する。
　排気管９３１は、エンジン９１の排気を大気に導くための配管であり、排気通路９３０を有する。
　排気マニホールド９３２は、排気管９３１の一端とエンジン９１とに接続している。排気マニホールド９３２は、シリンダ９１１の数と同数の通路が合流する構造を有する。
　排気浄化ユニット９３３は、排気管９３１に設けられている。排気浄化ユニット９３３は、排気に含まれる炭化水素を分解したり、微粒子状物質を捕捉したりする。 The exhaust system 93 discharges the exhaust gas emitted by the engine 91 to the outside air. The exhaust system 93 includes an exhaust pipe 931, an exhaust manifold 932, and an exhaust purification unit 933.
The exhaust pipe 931 is a pipe for guiding the exhaust of the engine 91 to the atmosphere, and has an exhaust passage 930.
An exhaust manifold 932 is connected to one end of the exhaust pipe 931 and the engine 91. The exhaust manifold 932 has a structure in which passages equal in number to the number of cylinders 911 are joined.
The exhaust purification unit 933 is provided in the exhaust pipe 931. The exhaust purification unit 933 decomposes hydrocarbons contained in the exhaust or captures particulate matter.
　過給器９４は、排気のエネルギーを利用して吸気管９２１内で吸入空気を圧縮し燃焼室９１０に加圧した吸入空気を過給する。過給器９４は、コンプレッサ９４１、タービン９４２、及び、シャフト９４３を有する。
　コンプレッサ９４１は、吸気通路９２０においてエアクリーナ９２３とインタークーラ９２４との間に配置されている。コンプレッサ９４１は、吸入空気を圧縮可能である。
　タービン９４２は、排気通路９３０において排気マニホールド９３２と排気浄化ユニット９３３との間に配置されている。タービン９４２は、排気のエネルギーにより回転駆動される。
　シャフト９４３は、コンプレッサ９４１とタービン９４２とを連結している。コンプレッサ９４１とタービン９４２とは、シャフト９４３により同期して回転する。 The supercharger 94 compresses the intake air in the intake pipe 921 using the energy of the exhaust to supercharge the intake air pressurized to the combustion chamber 910. The turbocharger 94 has a compressor 941, a turbine 942, and a shaft 943.
The compressor 941 is disposed between the air cleaner 923 and the intercooler 924 in the intake passage 920. The compressor 941 can compress intake air.
The turbine 942 is disposed between the exhaust manifold 932 and the exhaust purification unit 933 in the exhaust passage 930. The turbine 942 is rotationally driven by the energy of the exhaust.
The shaft 943 connects the compressor 941 and the turbine 942. The compressor 941 and the turbine 942 are synchronously rotated by the shaft 943.
　排気還流系９５は、タービン９４２を通過した後の排気を吸気通路９２０に還流する。吸気通路９２０に還流された排気は、エアクリーナ９２３を経由した空気とともに燃焼室９１０に供給される。排気還流系９５は、ＥＧＲ管９５１、ＥＧＲクーラ９５２、及び、弁装置１を備える。 The exhaust gas recirculation system 95 recirculates the exhaust gas after passing through the turbine 942 to the intake passage 920. The exhaust gas returned to the intake passage 920 is supplied to the combustion chamber 910 together with the air that has passed through the air cleaner 923. The exhaust gas recirculation system 95 includes an EGR pipe 951, an EGR cooler 952, and the valve device 1.
　ＥＧＲ管９５１は、排気管９３１の排気浄化ユニット９３３の下流側と、吸気管９２１のコンプレッサ９４１の上流側とを接続する。ＥＧＲ管９５１は、タービン９４２を通過した後の排気をコンプレッサ９４１による圧縮前の空気に還流するＥＧＲ通路９５０を有する。
　ＥＧＲクーラ９５２は、ＥＧＲ管９５１に設けられている。ＥＧＲクーラ９５２は、ＥＧＲ通路９５０を通る気体を冷却する。
　弁装置１は、ＥＧＲ管９５１と吸気管９２１とが接続されている箇所に設けられている。弁装置１は、ＥＧＲ通路９５０を通じて吸気通路９２０に流入する気体の流量を増減する。弁装置１は、ＥＣＵ９６と電気的に接続されている。 The EGR pipe 951 connects the downstream side of the exhaust gas purification unit 933 of the exhaust pipe 931 and the upstream side of the compressor 941 of the intake pipe 921. The EGR pipe 951 has an EGR passage 950 for recirculating the exhaust after passing through the turbine 942 to the air before compression by the compressor 941.
The EGR cooler 952 is provided in the EGR pipe 951. The EGR cooler 952 cools the gas passing through the EGR passage 950.
The valve device 1 is provided at a point where the EGR pipe 951 and the intake pipe 921 are connected. The valve device 1 increases or decreases the flow rate of the gas flowing into the intake passage 920 through the EGR passage 950. The valve device 1 is electrically connected to the ECU 96.
　ＥＣＵ９６は、演算部としてのＣＰＵ、ならびに、記憶部としてのＲＡＭ及びＲＯＭ等を有するマイクロコンピュータ等から構成されている。ＥＣＵ９６は、エンジンシステム９０を搭載する車両や装置の駆動状況、当該車両や装置を操作する操作者の操作内容に応じて、スロットル９２５や弁装置１の駆動を制御する。 The ECU 96 is configured of a CPU as an arithmetic unit, a microcomputer having a RAM and a ROM as a storage unit, and the like. The ECU 96 controls the drive of the throttle 925 and the valve device 1 according to the driving condition of the vehicle or device on which the engine system 90 is mounted and the operation content of the operator operating the vehicle or device.
　次に、弁装置１の詳細な構成について、図２～図７に基づいて説明する。
　弁装置１は、円筒状の弁部材を回転駆動することによって流体の通路の開度を増減可能なロータリー式の弁である。弁装置１は、ＥＧＲ通路９５０の吸気通路９２０に対する開度を増減可能である。弁装置１は、弁ハウジング１０、「回転体」としての弁部材２０、「シャフト」としての上シャフト２５、「シャフト」としての下シャフト２６、二つの軸受２７１，２７２、「シール部」としてのオイルシール３０、駆動部３５、ギヤ部３７などを備える。 Next, the detailed configuration of the valve device 1 will be described based on FIG. 2 to FIG.
The valve device 1 is a rotary valve that can increase or decrease the degree of opening of a fluid passage by rotationally driving a cylindrical valve member. The valve device 1 can increase or decrease the opening degree of the EGR passage 950 with respect to the intake passage 920. The valve device 1 includes a valve housing 10, a valve member 20 as a "rotary body", an upper shaft 25 as a "shaft", a lower shaft 26 as a "shaft", two bearings 271 and 272, a "seal portion" An oil seal 30, a drive unit 35, a gear unit 37 and the like are provided.
　弁ハウジング１０は、ケーシング１１１、センサカバー１１２、ボトムカバー１１３、筒部材１６、ハウジング側シール部材１７などを有する。
　ケーシング１１１は、アルミニウムなどの金属材料から弁部材２０を収容可能に形成されている。ケーシング１１１は、吸気通路９２０とＥＧＲ通路９５０との合流部分を形成する。具体的には、ケーシング１１１は、図５及び図６に示すように、「連通空間」としての弁室１１０、「流路」としての上流側流路１２、「流路」としての下流側流路１３、及び、「流路」としての収容空間１４を有する。 The valve housing 10 includes a casing 111, a sensor cover 112, a bottom cover 113, a cylindrical member 16, a housing side sealing member 17, and the like.
The casing 111 is formed to be able to receive the valve member 20 from a metal material such as aluminum. The casing 111 forms a joining portion of the intake passage 920 and the EGR passage 950. Specifically, as shown in FIGS. 5 and 6, the casing 111 has a valve chamber 110 as a “communication space”, an upstream flow passage 12 as a “flow passage”, and a downstream flow as a “flow passage”. It has a passage 13 and an accommodation space 14 as a "flow passage".
　弁室１１０は、弁部材２０を回転可能に収容可能なよう形成されている。
　上流側流路１２は、弁室１１０に連通するよう形成されている。上流側流路１２は、エアクリーナ９２３に連通する。
　下流側流路１３は、上流側流路１２とは別に弁室１１０に連通するよう形成されている。下流側流路１３は、上流側流路１２と同軸上に形成されている。下流側流路１３は、インタークーラ９２４に連通する。
　収容空間１４は、上流側流路１２及び下流側流路１３とは別に弁室１１０に連通するよう形成されている。収容空間１４は、ハウジング側シール部材１７が組み付けられた筒部材１６を収容可能に形成されている。収容空間１４は、ＥＧＲ通路９５０に連通する。 The valve chamber 110 is formed to be able to rotatably accommodate the valve member 20.
The upstream flow passage 12 is formed to communicate with the valve chamber 110. The upstream side flow passage 12 communicates with the air cleaner 923.
The downstream flow passage 13 is formed to communicate with the valve chamber 110 separately from the upstream flow passage 12. The downstream side flow passage 13 is formed coaxially with the upstream side flow passage 12. The downstream flow passage 13 communicates with the intercooler 924.
The accommodation space 14 is formed to communicate with the valve chamber 110 separately from the upstream flow passage 12 and the downstream flow passage 13. The accommodation space 14 is formed so as to be able to accommodate the cylindrical member 16 in which the housing-side seal member 17 is assembled. The storage space 14 communicates with the EGR passage 950.
　ケーシング１１１は、図４に示すように、弁室１１０を形成する壁体１１４を有する。壁体１１４は、上シャフト２５が挿通される通孔１０１を有する。壁体１１４の通孔１０１を形成する内壁には、軸受２７１及びオイルシール３０が設けられている。軸受２７１は、上シャフト２５を回転可能に支持する。オイルシール３０は、弁室１１０の気体が通孔１０１を通って弁室１１０の外部に流出することを防止する。オイルシール３０の詳細な構成は、後述する。 The casing 111 has a wall 114 forming a valve chamber 110, as shown in FIG. The wall body 114 has a through hole 101 through which the upper shaft 25 is inserted. A bearing 271 and an oil seal 30 are provided on the inner wall forming the through hole 101 of the wall body 114. The bearing 271 rotatably supports the upper shaft 25. The oil seal 30 prevents the gas in the valve chamber 110 from flowing out of the through hole 101 to the outside of the valve chamber 110. The detailed configuration of the oil seal 30 will be described later.
　センサカバー１１２は、ケーシング１１１の壁体１１４から見て弁室１１０とは反対側に設けられる。センサカバー１１２は、ケーシング１１１とともに駆動部３５やギヤ部３７などを収容可能な収容空間３７０を形成する。すなわち、弁室１１０と収容空間３７０とは、ケーシング１１１の壁体１１４によって区画されている。 The sensor cover 112 is provided on the opposite side of the valve chamber 110 as viewed from the wall 114 of the casing 111. The sensor cover 112 forms an accommodation space 370 capable of accommodating the drive unit 35, the gear unit 37, and the like together with the casing 111. That is, the valve chamber 110 and the housing space 370 are partitioned by the wall 114 of the casing 111.
　ボトムカバー１１３は、ケーシング１１１のセンサカバー１１２が設けられる側とは反対側に設けられる。ボトムカバー１１３は、ケーシング１１１とともに弁室１１０を形成する。ボトムカバー１１３は、下シャフト２６を挿入可能な通孔１０２を有する。通孔１０２を形成するボトムカバー１１３の内壁には、軸受２７２が設けられる。 The bottom cover 113 is provided on the side of the casing 111 opposite to the side on which the sensor cover 112 is provided. The bottom cover 113 forms a valve chamber 110 together with the casing 111. The bottom cover 113 has a through hole 102 into which the lower shaft 26 can be inserted. A bearing 272 is provided on the inner wall of the bottom cover 113 forming the through hole 102.
　筒部材１６は、ケーシング１１１とは別に設けられる部材である。筒部材１６は、フランジ部１６１、第一側壁部１６２、及び、第二側壁部１６３を有する。筒部材１６は、ステンレスから形成されている。 The cylindrical member 16 is a member provided separately from the casing 111. The cylindrical member 16 has a flange portion 161, a first side wall portion 162, and a second side wall portion 163. The cylindrical member 16 is formed of stainless steel.
　フランジ部１６１は、略環状に形成されている部位である。筒部材１６が収容空間１４に収容されるとき、フランジ部１６１は、図５，６に示すように、収容空間１４を形成する内壁に設けられている段差面１４１に当接する。このとき、筒部材１６は、環状のリング１９１をケーシング１１１に圧入することでケーシング１１１に対して固定される。リング１９１は、ウェーブワッシャ１９２を介してフランジ部１６１を段差面１４１に押し当てている。 The flange portion 161 is a portion formed in a substantially annular shape. When the cylindrical member 16 is accommodated in the accommodation space 14, the flange portion 161 abuts on a step surface 141 provided on the inner wall forming the accommodation space 14 as shown in FIGS. At this time, the cylindrical member 16 is fixed to the casing 111 by press-fitting the annular ring 191 into the casing 111. The ring 191 presses the flange portion 161 against the step surface 141 via the wave washer 192.
　第一側壁部１６２及び第二側壁部１６３は、フランジ部１６１の段差面１４１に当接する端面からフランジ部１６１の軸方向に沿って延びるよう形成されている。第一側壁部１６２及び第二側壁部１６３は、円筒の側壁の一部と同じ形状となるよう形成されている。第一実施形態では、第一側壁部１６２と第二側壁部１６３とは、中心角が１８０度となるよう形成されている。第一側壁部１６２は、フランジ部１６１の軸方向に沿って延びる高さが、第二側壁部１６３のフランジ部１６１の軸方向に沿って延びる高さに比べ低くなるよう形成されている。 The first side wall portion 162 and the second side wall portion 163 are formed to extend along the axial direction of the flange portion 161 from the end face in contact with the step surface 141 of the flange portion 161. The first side wall portion 162 and the second side wall portion 163 are formed to have the same shape as a part of the side wall of the cylinder. In the first embodiment, the first side wall portion 162 and the second side wall portion 163 are formed to have a central angle of 180 degrees. The first side wall portion 162 is formed such that the height extending in the axial direction of the flange portion 161 is lower than the height extending in the axial direction of the flange portion 161 of the second side wall portion 163.
　ハウジング側シール部材１７は、第一被覆部１７１、第一シールリップ部１７２、第二被覆部１７３、及び、第二シールリップ部１７４を有する。ハウジング側シール部材１７は、ゴムなどの弾性材料から略筒状に形成されている。 The housing-side seal member 17 has a first covering portion 171, a first sealing lip portion 172, a second covering portion 173, and a second sealing lip portion 174. The housing side sealing member 17 is formed in a substantially cylindrical shape from an elastic material such as rubber.
　第一被覆部１７１は、第一側壁部１６２の径方向内側、径方向外側、及び、フランジ部１６１側とは反対側の端部を覆うよう形成されている。
　第一シールリップ部１７２は、第一被覆部１７１のフランジ部１６１側とは反対側の端部を覆う部位に設けられているリップ状の部位である。第一シールリップ部１７２は、第一被覆部１７１が第一側壁部１６２を覆うよう設けられるとき、図５，６に示すように、第一側壁部１６２の径外方向、すなわち、フランジ部１６１の径外方向に突出するよう形成される。 The first covering portion 171 is formed to cover the radially inner side, the radial outer side, and the end portion of the first side wall portion 162 opposite to the flange portion 161 side.
The first seal lip portion 172 is a lip-like portion provided at a portion covering the end portion of the first covering portion 171 opposite to the flange portion 161 side. When the first covering portion 171 is provided so as to cover the first side wall portion 162, as shown in FIGS. 5 and 6, the first seal lip portion 172 is radially outward of the first side wall portion 162, that is, the flange portion 161. It is formed to project in the radially outward direction of.
　第二被覆部１７３は、第二側壁部１６３の径方向内側、径方向外側、フランジ部１６１側とは反対側の端部、及び、第二側壁部１６３の第一側壁部１６２と接続する部位の端面を覆うよう形成されている。
　第二シールリップ部１７４は、第二被覆部１７３のフランジ部１６１側とは反対側の端部を覆う部位に設けられているリップ状の部位である。第二シールリップ部１７４は、第二被覆部１７３が第二側壁部１６３を覆うよう設けられるとき、図５，６に示すように、第二側壁部１６３の径内方向、すなわち、フランジ部１６１の径内方向に突出するよう形成される。 The second covering portion 173 is a portion connected to the radially inner side and the radially outer side of the second side wall portion 163, the end opposite to the flange portion 161 side, and the first side wall portion 162 of the second side wall portion 163. It is formed to cover the end face of
The second seal lip portion 174 is a lip-like portion provided at a portion covering the end portion of the second covering portion 173 opposite to the flange portion 161 side. When the second covering portion 173 is provided to cover the second side wall portion 163, as shown in FIGS. 5 and 6, the second seal lip portion 174 has a radially inward direction of the second side wall portion 163, that is, the flange portion 161. It is formed to project radially inward.
　弁部材２０は、弁部材側シール部２１、上アーム２２、及び、下アーム２３を有する。弁部材２０は、高い耐熱性を有する樹脂材料、例えば、ポリフェニレンスルフィドから形成されている。弁部材２０は、図５，６に示すように、弁室１１０に収容され、弁ハウジング１０に対して相対回転可能に設けられている（図５の実線矢印Ｒ５及び図６の実線矢印Ｒ６参照）。ここで、弁部材２０に回転方向について、便宜的に、図５の状態から図６の状態となるよう回転する方向を「ＥＧＲ通路遮断方向」といい、図６の状態から図５の状態となるよう回転する方向を「ＥＧＲ通路開放方向」という。 The valve member 20 has a valve member side seal portion 21, an upper arm 22, and a lower arm 23. The valve member 20 is formed of a resin material having high heat resistance, such as polyphenylene sulfide. As shown in FIGS. 5 and 6, the valve member 20 is accommodated in the valve chamber 110 and is provided so as to be rotatable relative to the valve housing 10 (see solid arrow R5 in FIG. 5 and solid arrow R6 in FIG. 6). ). Here, with respect to the rotational direction of the valve member 20, for convenience, the direction of rotation from the state of FIG. 5 to the state of FIG. 6 is referred to as “EGR passage blocking direction”, and the state of FIG. The direction of rotation is referred to as "the EGR passage opening direction".
　弁部材側シール部２１は、ハウジング側シール部材１７に当接可能な外壁面２１１が円筒の径方向外側の壁面の一部と同じ形状となるよう形成されている。外壁面２１１は、図５、６に示すように、シール面２１２、２１３、及び、接続シール面２１４を有する。 The valve member side seal portion 21 is formed such that the outer wall surface 211 which can contact the housing side seal member 17 has the same shape as a part of the wall surface on the radially outer side of the cylinder. The outer wall surface 211 has seal surfaces 212 and 213 and a connection seal surface 214, as shown in FIGS.
　シール面２１２、２１３は、外壁面２１１において弁部材側シール部２１の周方向に向かうよう形成されている。
　シール面２１２は、外壁面２１１においてＥＧＲ通路遮断方向に向かうよう形成されている。シール面２１２は、円筒の径方向外側の側壁の内壁面の一部と同じ形状となっている。第一実施形態では、シール面２１２は、中心角が１８０度の半円筒形となっている。シール面２１２は、半径がシール面２１３の半径に比べ大きくなるよう形成されている。
　シール面２１３は、外壁面２１１においてＥＧＲ通路遮断方向に向かうよう形成されている。シール面２１３は、円筒の径方向外側の側壁の外壁面の一部と同じ形状となっている。第一実施形態では、シール面２１３は、中心角が１８０度の半円筒形となっている。
　シール面２１２を含む仮想円筒面とシール面２１３を含む仮想円筒面とは同軸上に中心軸を有する。当該中心軸は、弁部材２０の回転軸ＲＡ２０に直交する。 The seal surfaces 212 and 213 are formed on the outer wall surface 211 in the circumferential direction of the valve member side seal portion 21.
The seal surface 212 is formed on the outer wall surface 211 so as to be directed in the EGR passage blocking direction. The seal surface 212 has the same shape as a part of the inner wall surface of the radially outer side wall of the cylinder. In the first embodiment, the sealing surface 212 has a semi-cylindrical shape with a central angle of 180 degrees. The sealing surface 212 is formed such that the radius is larger than the radius of the sealing surface 213.
The seal surface 213 is formed on the outer wall surface 211 so as to be directed in the EGR passage blocking direction. The sealing surface 213 has the same shape as a part of the outer wall surface of the radially outer side wall of the cylinder. In the first embodiment, the seal surface 213 has a semi-cylindrical shape with a central angle of 180 degrees.
The virtual cylindrical surface including the sealing surface 212 and the virtual cylindrical surface including the sealing surface 213 have a central axis coaxially. The central axis is orthogonal to the rotation axis RA20 of the valve member 20.
　接続シール面２１４は、外壁面２１１においてＥＧＲ通路遮断方向に向かうよう形成されている。接続シール面２１４は、シール面２１２、２１３に直交するよう形成されている。接続シール面２１４の法線は、平行移動すると回転軸ＲＡ２０に直交する。 The connection seal surface 214 is formed on the outer wall surface 211 so as to be directed in the EGR passage blocking direction. The connection sealing surface 214 is formed to be orthogonal to the sealing surfaces 212 and 213. When translated, the normal to the connection seal surface 214 is orthogonal to the rotation axis RA20.
　弁部材２０がＥＧＲ通路開放方向に回転し図５に示す状態となると、弁室１１０に対して上流側流路１２を最小限に絞りつつ、弁室１１０に対して収容空間１４に連通するＥＧＲ通路９５０を最大限に開放する。
　弁部材２０がＥＧＲ通路遮断方向に回転し図６に示す状態になると、第一シールリップ部１７２がシール面２１２に当接し、第二シールリップ部１７４がシール面２１３に当接する。これにより、弁室１１０とＥＧＲ通路９５０とを遮断しつつ、弁室１１０に対して上流側流路１２を最大限に開放する。 When the valve member 20 rotates in the EGR passage opening direction and becomes the state shown in FIG. 5, the EGR which communicates with the valve chamber 110 to the accommodation space 14 while squeezing the upstream side flow passage 12 to the valve chamber 110 to the minimum. Open the passage 950 as much as possible.
When the valve member 20 rotates in the EGR passage blocking direction to be in the state shown in FIG. 6, the first seal lip portion 172 abuts on the seal surface 212 and the second seal lip portion 174 abuts on the seal surface 213. Thus, the upstream side flow passage 12 is maximally opened with respect to the valve chamber 110 while the valve chamber 110 and the EGR passage 950 are shut off.
　また、第一実施形態では、弁部材２０の回転角度を制御することによって、ＥＧＲ通路９５０の吸気通路９２０に対する開度とともに吸気通路９２０の開度を増減することが可能である。これにより、吸気通路９２０の負圧の大きさを制御することができるため、例えば、エンジン９１で生じる負圧を利用する代わりに弁部材２０の回転角度を制御することによって吸気通路９２０に流入する排気量を制御することが可能である。 Further, in the first embodiment, by controlling the rotation angle of the valve member 20, it is possible to increase / decrease the opening degree of the intake passage 920 as well as the opening degree of the EGR passage 950 with respect to the intake passage 920. Thus, the magnitude of the negative pressure in the intake passage 920 can be controlled. For example, instead of utilizing the negative pressure generated by the engine 91, the air flows into the intake passage 920 by controlling the rotation angle of the valve member 20. It is possible to control the displacement.
　上アーム２２は、弁部材側シール部２１の回転軸ＲＡ２０に沿う方向の端部のうちセンサカバー１１２側の端部に設けられている。上アーム２２は、上アーム部２２１、上アーム第一締結部２２２、及び、「第二回転部」としての上アーム第二締結部２２３を有する。
　上アーム部２２１は、弁部材側シール部２１のセンサカバー１１２側の端部から弁部材２０の回転軸ＲＡ２０に向かう方向、すなわち、略筒状の弁部材２０の径内方向に延びるよう形成されている略扇状の部位である。
　上アーム第一締結部２２２は、上アーム部２２１の回転軸ＲＡ２０上の端部に設けられる略環状の部位である。上アーム第一締結部２２２は、上シャフト２５が圧入される通孔２２４を有する。上アーム第一締結部２２２は、図４，７に示すように、回転軸ＲＡ２０に沿う方向においてケーシング１１１の壁体１１４に対向するよう形成されている。
　上アーム第二締結部２２３は、上アーム第一締結部２２２の上アーム部２２１とは反対側に設けられている略環状の部位である。上アーム第二締結部２２３の外径は、上アーム第一締結部２２２の外径に比べ小さい。上アーム第二締結部２２３は、上シャフト２５が圧入される通孔２２５を有する。
　なお、図４、７には、便宜的に、上アーム部２２１と上アーム第一締結部２２２、及び、上アーム第一締結部２２２と上アーム第二締結部２２３との境界線を二点鎖線ＶＬ１１，ＶＬ１２で示す。 The upper arm 22 is provided at an end of the valve member side seal portion 21 in the direction along the rotation axis RA 20 at an end on the sensor cover 112 side. The upper arm 22 has an upper arm portion 221, an upper arm first fastening portion 222, and an upper arm second fastening portion 223 as a "second rotating portion".
The upper arm portion 221 is formed to extend in the direction from the end on the sensor cover 112 side of the valve member side seal portion 21 toward the rotation axis RA20 of the valve member 20, that is, inward in the radial direction of the substantially cylindrical valve member 20. It is an approximately fan-shaped part.
The upper arm first fastening portion 222 is a substantially annular portion provided at an end of the upper arm portion 221 on the rotation axis RA20. The upper arm first fastening portion 222 has a through hole 224 into which the upper shaft 25 is press-fitted. The upper arm first fastening portion 222 is formed to face the wall 114 of the casing 111 in the direction along the rotation axis RA20, as shown in FIGS.
The upper arm second fastening portion 223 is a substantially annular portion provided on the opposite side of the upper arm portion 221 of the upper arm first fastening portion 222. The outer diameter of the upper arm second fastening portion 223 is smaller than the outer diameter of the upper arm first fastening portion 222. The upper arm second fastening portion 223 has a through hole 225 into which the upper shaft 25 is press-fitted.
In FIGS. 4 and 7, for convenience, the boundary between the upper arm portion 221 and the upper arm first fastening portion 222, and the upper arm first fastening portion 222 and the upper arm second fastening portion 223 has two points. It shows with the dashed line VL11 and VL12.
　下アーム２３は、弁部材側シール部２１の回転軸ＲＡ２０に沿う方向の端部のうちボトムカバー１１３側の端部に設けられている。下アーム２３は、下アーム部２３１、下アーム第一締結部２３２、及び、下アーム第二締結部２３３を有する。
　下アーム部２３１は、弁部材側シール部２１のボトムカバー１１３側の端部から弁部材２０の回転軸ＲＡ２０に向かう方向に延びるよう形成されている略扇状の部位である。
　下アーム第一締結部２３２は、下アーム部２３１の回転軸ＲＡ２０上の端部に設けられる略環状の部位である。下アーム第一締結部２３２は、下シャフト２６が圧入される通孔２３４を有する。
　下アーム第二締結部２３３は、下アーム第一締結部２３２の下アーム部２３１とは反対側に設けられている略環状の部位である。下アーム第二締結部２３３の外径は、下アーム第一締結部２３２の外径に比べ小さい。下アーム第二締結部２３３は、下シャフト２６が圧入される通孔２３５を有する。
　なお、図４には、便宜的に、下アーム部２３１と下アーム第一締結部２３２、及び、下アーム第一締結部２３２と下アーム第二締結部２３３との境界線を二点鎖線ＶＬ１３，ＶＬ１４で示す。 The lower arm 23 is provided at an end of the valve member side seal portion 21 in the direction along the rotation axis RA 20 at an end on the bottom cover 113 side. The lower arm 23 has a lower arm portion 231, a lower arm first fastening portion 232, and a lower arm second fastening portion 233.
The lower arm portion 231 is a substantially fan-shaped portion formed to extend from the end on the bottom cover 113 side of the valve member side seal portion 21 toward the rotation axis RA20 of the valve member 20.
The lower arm first fastening portion 232 is a substantially annular portion provided at an end of the lower arm portion 231 on the rotation axis RA20. The lower arm first fastening portion 232 has a through hole 234 into which the lower shaft 26 is press-fitted.
The lower arm second fastening portion 233 is a substantially annular portion provided on the opposite side of the lower arm portion 231 of the lower arm first fastening portion 232. The outer diameter of the lower arm second fastening portion 233 is smaller than the outer diameter of the lower arm first fastening portion 232. The lower arm second fastening portion 233 has a through hole 235 into which the lower shaft 26 is press-fitted.
In FIG. 4, for convenience, the boundary between the lower arm portion 231 and the lower arm first fastening portion 232 and the lower arm first fastening portion 232 and the lower arm second fastening portion 233 is indicated by a two-dot chain line VL13. , VL14.
　上シャフト２５は、ステンレスから形成されている略棒状の部材である。上シャフト２５は、上アーム第一締結部２２２及び上アーム第二締結部２２３に締結されることによって、弁部材２０と一体に回転可能に設けられる。上シャフト２５は、図４に示すように、上アーム２２の回転軸ＲＡ２０上の端部から下シャフト２６とは反対の方向に延びるよう形成されている。上シャフト２５は、ケーシング１１１の通孔１０１に挿入され、オイルシール３０に挿通されつつ軸受２７１に回転可能に支持されている。 The upper shaft 25 is a substantially rod-like member formed of stainless steel. The upper shaft 25 is rotatably provided integrally with the valve member 20 by being fastened to the upper arm first fastening portion 222 and the upper arm second fastening portion 223. The upper shaft 25 is formed to extend from the end of the upper arm 22 on the rotation axis RA 20 in the direction opposite to the lower shaft 26, as shown in FIG. The upper shaft 25 is inserted into the through hole 101 of the casing 111, and is rotatably supported by the bearing 271 while being inserted into the oil seal 30.
　下シャフト２６は、ステンレスから形成されている略棒状の部材である。下シャフト２６は、下アーム第一締結部２３２及び下アーム第二締結部２３３に締結されることによって、弁部材２０と一体に回転可能に設けられている。下シャフト２６は、図４に示すように、下アーム２３の回転軸ＲＡ２０上の端部から上アーム２２とは反対の方向に延びるよう形成されている。下シャフト２６は、ボトムカバー１１３の通孔１０２に挿入され、軸受２７２に回転可能に支持されている。下シャフト２６は、上シャフト２５と回転軸が同軸となるよう設けられている。 The lower shaft 26 is a substantially rod-like member formed of stainless steel. The lower shaft 26 is rotatably provided integrally with the valve member 20 by being fastened to the lower arm first fastening portion 232 and the lower arm second fastening portion 233. The lower shaft 26 is formed to extend from the end of the lower arm 23 on the rotation axis RA 20 in a direction opposite to the upper arm 22 as shown in FIG. 4. The lower shaft 26 is inserted into the through hole 102 of the bottom cover 113 and rotatably supported by the bearing 272. The lower shaft 26 is provided such that the upper shaft 25 and the rotation axis are coaxial.
　オイルシール３０は、図７に示すように、外側押さえ部３１、当接部３２、及び、内側押さえ部３３を有する。オイルシール３０は、壁体１１４の通孔１０１を形成する内壁において軸受２７１の弁室１１０側に設けられる。 As shown in FIG. 7, the oil seal 30 has an outer pressing portion 31, an abutting portion 32, and an inner pressing portion 33. The oil seal 30 is provided on the valve chamber 110 side of the bearing 271 on the inner wall forming the through hole 101 of the wall body 114.
　外側押さえ部３１は、金属から略カップ状に形成されている部材であって、オイルシール３０の外形をなす。外側押さえ部３１は、図７に示すように、カップの底にあたる底部３１１が軸受２７１側に位置するよう設けられている。底部３１１は、上シャフト２５が挿通可能な通孔３１２を有する。筒部３１３は、底部３１１の径方向外側から弁室１１０に向かって延びるよう形成される筒状の部位である。筒部３１３は、径方向外側の外壁面３１４が通孔１０１を形成する「シール部支持壁面」としての内壁面１１５に当接している。 The outer side pressing portion 31 is a member formed in a substantially cup shape from metal, and forms an outer shape of the oil seal 30. As shown in FIG. 7, the outer pressing portion 31 is provided such that the bottom portion 311 corresponding to the bottom of the cup is located on the bearing 271 side. The bottom portion 311 has a through hole 312 through which the upper shaft 25 can be inserted. The cylindrical portion 313 is a cylindrical portion formed so as to extend toward the valve chamber 110 from the radially outer side of the bottom portion 311. The cylindrical portion 313 is in contact with the inner wall surface 115 as a “seal portion support wall surface” in which the radially outer outer wall surface 314 forms the through hole 101.
　当接部３２は、弾性材料から形成されている略平板状の部材であって、外側押さえ部３１の内側に収容されている。当接部３２は、図７に示すように、径方向内側の端部３２１によって上シャフト２５が挿通可能な通孔３２２が形成されている。端部３２１は、上シャフト２５の径方向外側の外壁面２５３に当接している。これにより、上シャフト２５の外壁面２５３に沿って弁室１１０の気体が弁室１１０から軸受２７１に向かう方向に流入することを規制する。 The contact portion 32 is a substantially flat plate-like member made of an elastic material, and is housed inside the outer side pressing portion 31. As shown in FIG. 7, the contact portion 32 is formed with a through hole 322 through which the upper shaft 25 can be inserted by the radially inner end portion 321. The end portion 321 is in contact with the radially outer surface 253 of the upper shaft 25. Thus, the gas in the valve chamber 110 is restricted from flowing from the valve chamber 110 toward the bearing 271 along the outer wall surface 253 of the upper shaft 25.
　内側押さえ部３３は、金属から略カップ状に形成されている部材であって、外側押さえ部３１の内側に収容されている。内側押さえ部３３は、図７に示すように、カップの底にあたる底部３３１が軸受２７１側に位置するよう設けられている。底部３３１は、底部３１１との間に当接部３２を挟み込み、当接部３２の移動を規制している。底部３３１には、上シャフト２５が挿通可能な通孔３３２が形成されている。筒部３３３は、底部３３１の径方向外側から弁室１１０に向かって延びるよう形成されている筒状の部位である。筒部３３３は、径方向外側の外壁面３３４が外側押さえ部３１の筒部３１３の内壁面３１５に当接している。 The inner pressing portion 33 is a member formed in a substantially cup shape from metal, and is housed inside the outer pressing portion 31. As shown in FIG. 7, the inner pressing portion 33 is provided such that the bottom portion 331 corresponding to the bottom of the cup is located on the bearing 271 side. The bottom portion 331 holds the contact portion 32 between itself and the bottom portion 311, and restricts the movement of the contact portion 32. The bottom portion 331 is formed with a through hole 332 through which the upper shaft 25 can be inserted. The cylindrical portion 333 is a cylindrical portion formed so as to extend toward the valve chamber 110 from the radially outer side of the bottom portion 331. In the cylindrical portion 333, the radially outer outer wall surface 334 is in contact with the inner wall surface 315 of the cylindrical portion 313 of the outer pressing portion 31.
　オイルシール３０は、図７に示すように、弁室１１０側に弁室１１０と連通するシール内空間３００を有する。
　ここで、上シャフト２５を構成する部位として、軸受２７１に回転可能に支持されている部位を挿入部２５１とし、シール内空間３００に位置する部位を「第一回転部」としての露出部２５２とする。露出部２５２の径方向外側の外壁面２５３の一部は、シール内空間３００において露出している。
　第一実施形態では、図７に示すように、上シャフト２５の露出部２５２及び上アーム第二締結部２２３の一部は、シール内空間３００に位置している。上アーム第二締結部２２３の径方向外側の外壁面２２６と内側押さえ部３３の筒部３３３の径方向内側の内壁面３３５との間の距離Ｌ１１は、露出部２５２の外壁面２５３と内側押さえ部３３の内壁面３３５との間の距離Ｌ１２に比べ短い。
　また、距離Ｌ１１は、内壁面１１５に接続しかつ弁部材２０に対向する壁体１１４の「ハウジング側隣接壁面」としての内壁面１１８と、内壁面１１８に対向する上アーム第一締結部２２２の弁部材側壁面２２７との間の距離Ｌ１３に比べ短い。 As shown in FIG. 7, the oil seal 30 has a seal internal space 300 communicating with the valve chamber 110 on the valve chamber 110 side.
Here, as a portion constituting the upper shaft 25, a portion rotatably supported by the bearing 271 is referred to as an insertion portion 251, and a portion located in the seal inner space 300 is referred to as a first rotating portion. Do. A part of the radially outer surface 253 of the exposed portion 252 is exposed in the seal inner space 300.
In the first embodiment, as shown in FIG. 7, the exposed portion 252 of the upper shaft 25 and a part of the upper arm second fastening portion 223 are located in the seal inner space 300. A distance L11 between the radially outer outer wall surface 226 of the upper arm second fastening portion 223 and the radially inner inner wall surface 335 of the cylindrical portion 333 of the inner pressing portion 33 is equal to the outer wall surface 253 of the exposed portion 252 The distance L12 is shorter than the distance L12 with the inner wall surface 335 of the portion 33.
The distance L11 is defined by the inner wall surface 118 as the “housing side adjacent wall surface” of the wall 114 connected to the inner wall surface 115 and facing the valve member 20, and the upper arm first fastening portion 222 facing the inner wall surface 118. It is shorter than the distance L13 between it and the valve member side wall surface 227.
　駆動部３５は、例えば、ブラシと整流子との摺接構造を有する直流型のモータである。駆動部３５は、弁ハウジング１０が有するコネクタ１１６を介してＥＣＵ９６と電気的に接続している。駆動部３５は、ＥＣＵ９６の制御によって弁部材２０を回転可能な駆動力を発生する。 The driving unit 35 is, for example, a direct current motor having a sliding contact structure between a brush and a commutator. The drive unit 35 is electrically connected to the ECU 96 through the connector 116 of the valve housing 10. The driving unit 35 generates a driving force capable of rotating the valve member 20 under the control of the ECU 96.
　ギヤ部３７は、複数の歯車を有し、減速比に応じて駆動部３５のトルクを増幅して上シャフト２５に伝達する。ギヤ部３７は、ピニオンギヤ３７１、中間減速ギヤ３７２、小径ギヤ３７３、及び、バルブギヤ３７４を有する。
　ピニオンギヤ３７１は、駆動部３５の出力軸に取り付けられる。
　中間減速ギヤ３７２は、ピニオンギヤ３７１に噛み合っている。
　小径ギヤ３７３は、中間減速ギヤ３７２と共通の中心軸に支持され、中間減速ギヤ３７２と一体に回転する。
　バルブギヤ３７４は、小径ギヤ３７３に噛み合うよう設けられている。バルブギヤ３７４は、例えば、上シャフト２５に比べ大きい外径を有し、上シャフト２５と一体に回転する。バルブギヤ３７４とケーシング１１１との間には、弁部材２０をＥＧＲ通路遮断方向に回転するよう弁部材２０を付勢するリターンスプリング３９が設けられている。 The gear portion 37 has a plurality of gears, amplifies the torque of the drive portion 35 according to the reduction ratio, and transmits the amplified torque to the upper shaft 25. The gear portion 37 has a pinion gear 371, an intermediate reduction gear 372, a small diameter gear 373, and a valve gear 374.
The pinion gear 371 is attached to the output shaft of the drive unit 35.
The intermediate reduction gear 372 meshes with the pinion gear 371.
The small diameter gear 373 is supported by the central axis common to the intermediate reduction gear 372 and rotates integrally with the intermediate reduction gear 372.
The valve gear 374 is provided to mesh with the small diameter gear 373. The valve gear 374 has, for example, a larger outer diameter than the upper shaft 25 and rotates integrally with the upper shaft 25. Between the valve gear 374 and the casing 111, a return spring 39 is provided which biases the valve member 20 to rotate the valve member 20 in the EGR passage blocking direction.
　検出部３８は、磁石３８１、及び、ホールＩＣ３８２を有する。
　磁石３８１は、バルブギヤ３７４に固定され、上シャフト２５及びバルブギヤ３７４とともに回転する。
　ホールＩＣ３８２は、センサカバー１１２に設けられている。ホールＩＣ３８２は、コネクタ１１６を介して磁石３８１が発生する磁界の磁束密度に応じた電気信号をＥＣＵ９６に出力する。ＥＣＵ９６は、検出部３８によって検出される弁部材２０の回転角が目標値に一致するよう、駆動部３５の通電量をフィードバック制御する。なお、回転角の目標値は、エンジンシステム９０の運転状態に応じて設定される。 The detection unit 38 has a magnet 381 and a Hall IC 382.
The magnet 381 is fixed to the valve gear 374 and rotates with the upper shaft 25 and the valve gear 374.
The Hall IC 382 is provided on the sensor cover 112. The Hall IC 382 outputs an electrical signal corresponding to the magnetic flux density of the magnetic field generated by the magnet 381 to the ECU 96 through the connector 116. The ECU 96 performs feedback control of the energization amount of the drive unit 35 such that the rotation angle of the valve member 20 detected by the detection unit 38 matches the target value. The target value of the rotation angle is set according to the operating state of the engine system 90.
　第一実施形態による弁装置１では、弁室１１０の気体は、上アーム第二締結部２２３の外壁面２２６と内側押さえ部３３の内壁面３３５との間を通って、露出部２５２の外壁面２５３と内側押さえ部３３の内壁面３３５との間や通孔１０１の上シャフト２５と壁体１１４との間に侵入する。上アーム第二締結部２２３の外壁面２２６と内側押さえ部３３の内壁面３３５との間の距離Ｌ１１は、露出部２５２の外壁面２５３と内側押さえ部３３の内壁面３３５との間の距離Ｌ１２に比べ短くなっている。これにより、弁室１１０の気体は、シール内空間３００の露出部２５２と内側押さえ部３３との間や通孔１０１の上シャフト２５と壁体１１４との間に侵入しにくくなるため、壁体１１４の回転軸ＲＡ２０に沿う方向の長さを短くすることができる。また、上アーム第二締結部２２３は、シール内空間３００に位置しているため、弁ハウジング１０の回転軸ＲＡ２０に沿う方向の長さを短くすることができる。したがって、弁装置１は、弁室１１０の気体の漏れを低減しつつ、回転軸ＲＡ２０に沿う方向の体格を小さくすることができる。 In the valve device 1 according to the first embodiment, the gas of the valve chamber 110 passes between the outer wall surface 226 of the upper arm second fastening portion 223 and the inner wall surface 335 of the inner pressing portion 33, and the outer wall surface of the exposed portion 252 Intrudes between the upper surface 25 of the through hole 101 and the wall body 114 between the inner wall portion 335 of the inner pressing portion 33 and the upper shaft 25 of the through hole 101. The distance L11 between the outer wall surface 226 of the upper arm second fastening portion 223 and the inner wall surface 335 of the inner pressing portion 33 is the distance L12 between the outer wall surface 253 of the exposed portion 252 and the inner wall surface 335 of the inner pressing portion 33. It is shorter than. As a result, the gas in the valve chamber 110 is less likely to intrude between the exposed portion 252 of the seal inner space 300 and the inner pressing portion 33 or between the upper shaft 25 of the through hole 101 and the wall body 114. The length in the direction along the rotation axis RA20 of 114 can be shortened. Further, since the upper arm second fastening portion 223 is located in the seal inner space 300, the length of the valve housing 10 in the direction along the rotation axis RA20 can be shortened. Therefore, the valve device 1 can reduce the physique in the direction along the rotation axis RA20 while reducing the gas leakage in the valve chamber 110.
　また、距離Ｌ１１は、壁体１１４の内壁面１１８と上アーム第一締結部２２２の弁部材側壁面２２７との間の距離Ｌ１３に比べ長い。図７の実線Ｆ１に示すように、壁体１１４の内壁面１１８と上アーム第二締結部２２３の弁部材側壁面２２７との間を流れる気体は、狭くなる上アーム第二締結部２２３の外壁面２２６と内側押さえ部３３の内壁面３３５との間に流入するとき流速が低下する。これにより、弁室１１０の気体は、シール内空間３００の露出部２５２の外壁面２５３と内側押さえ部３３の内壁面３３５との間や通孔１０１に挿通されている上シャフト２５と壁体１１４との間に侵入しにくくなる。したがって、弁装置１は、弁室１１０の気体の漏れをさらに低減することができる。 Further, the distance L11 is longer than the distance L13 between the inner wall surface 118 of the wall body 114 and the valve member side wall surface 227 of the upper arm first fastening portion 222. As indicated by the solid line F1 in FIG. 7, the gas flowing between the inner wall surface 118 of the wall body 114 and the valve member side wall surface 227 of the upper arm second fastening portion 223 is narrowed outside the upper arm second fastening portion 223. When flowing between the wall surface 226 and the inner wall surface 335 of the inner pressing portion 33, the flow velocity decreases. Thereby, the gas of the valve chamber 110 is inserted between the outer wall surface 253 of the exposed portion 252 of the seal inner space 300 and the inner wall surface 335 of the inner pressing portion 33 or the upper shaft 25 and the wall 114 It becomes difficult to invade between. Therefore, the valve device 1 can further reduce the gas leakage of the valve chamber 110.
　（第二実施形態）
　次に、第二実施形態による弁装置を図８に基づいて説明する。第二実施形態は、弁部材の上アーム第一締結部、及び、上アーム第一締結部に対向する弁ハウジングの内壁面の形状が第一実施形態と異なる。なお、第一実施形態と実質的に同一の部位には同一の符号を付し、説明を省略する。 Second Embodiment
Next, a valve device according to a second embodiment will be described based on FIG. The second embodiment differs from the first embodiment in the shapes of the inner wall surfaces of the valve housing facing the upper arm first fastening portion and the upper arm first fastening portion of the valve member. In addition, the same code | symbol is attached | subjected to the site | part substantially the same as 1st embodiment, and description is abbreviate | omitted.
　第二実施形態による弁装置２は、弁ハウジング１０、「回転体」としての弁部材４０、上シャフト２５、下シャフト２６、二つの軸受２７１，２７２、「シール部」としてのオイルシール４５、駆動部３５、ギヤ部３７などを備える。 The valve device 2 according to the second embodiment includes a valve housing 10, a valve member 40 as a "rotary body", an upper shaft 25, a lower shaft 26, two bearings 271, 272, an oil seal 45 as a "sealing portion" A unit 35, a gear unit 37, etc.
　弁部材４０は、弁部材側シール部２１、上アーム４２、及び、下アーム２３を有する。弁部材４０は、高い耐熱性を有する樹脂材料、例えば、ポリフェニレンスルフィドから形成され、弁室１１０において弁ハウジング１０に対して相対回転可能に設けられている。 The valve member 40 has a valve member side seal portion 21, an upper arm 42, and a lower arm 23. The valve member 40 is formed of a resin material having high heat resistance, for example, polyphenylene sulfide, and is provided so as to be rotatable relative to the valve housing 10 in the valve chamber 110.
　上アーム４２は、弁部材側シール部２１の回転軸ＲＡ４０に沿う方向の端部のうちセンサカバー１１２側の端部に設けられている。上アーム４２は、上アーム部２２１、上アーム第一締結部４２２、及び、上アーム第二締結部２２３を有する。 The upper arm 42 is provided at an end portion of the valve member side seal portion 21 in the direction along the rotation axis RA 40 at an end portion on the sensor cover 112 side. The upper arm 42 includes an upper arm portion 221, an upper arm first fastening portion 422, and an upper arm second fastening portion 223.
　上アーム第一締結部４２２は、上アーム部２２１の弁部材４０の回転軸ＲＡ４０上の端部に設けられる略環状の部位である。上アーム第一締結部４２２は、上シャフト２５が圧入される通孔４２４を有する。上アーム第一締結部４２２は、図８に示すように、回転軸ＲＡ４０に沿う方向においてケーシング１１１の壁体１１４に対向するよう形成されている。上アーム第一締結部４２２は、内壁面１１８に対向する弁部材側壁面４２５に「弁部材側凹状空間」としての凹状空間４２０を有する。
　なお、図８には、便宜的に、上アーム部２２１と上アーム第一締結部４２２、及び、上アーム第一締結部４２２と上アーム第二締結部２２３との境界線を二点鎖線ＶＬ２１，ＶＬ２２で示す。 The upper arm first fastening portion 422 is a substantially annular portion provided at an end of the valve member 40 of the upper arm portion 221 on the rotation axis RA40. The upper arm first fastening portion 422 has a through hole 424 into which the upper shaft 25 is press-fitted. As shown in FIG. 8, the upper arm first fastening portion 422 is formed to face the wall 114 of the casing 111 in the direction along the rotation axis RA40. The upper arm first fastening portion 422 has a concave space 420 as a “valve member side concave space” on the valve member side wall surface 425 facing the inner wall surface 118.
In FIG. 8, for convenience, the boundary between the upper arm portion 221 and the upper arm first fastening portion 422 and the upper arm first fastening portion 422 and the upper arm second fastening portion 223 is indicated by a two-dot chain line VL21. , VL22.
　オイルシール４５は、外側押さえ部４６、当接部３２、及び、内側押さえ部４８を有する。オイルシール４５は、壁体１１４の通孔１０１を形成する内壁において軸受２７１の弁室１１０側に設けられる。 The oil seal 45 has an outer pressing portion 46, an abutting portion 32, and an inner pressing portion 48. The oil seal 45 is provided on the valve chamber 110 side of the bearing 271 on the inner wall forming the through hole 101 of the wall body 114.
　外側押さえ部４６は、金属から略カップ状に形成されている部材であって、オイルシール４５の外形をなす。外側押さえ部４６は、図８に示すように、底部４６１を軸受２７１側に位置するよう設けられている。底部４６１は、上シャフト２５が挿通可能な通孔４６２を有する。筒部４６３は、底部４６１の径方向外側から弁室１１０に向かって延びるよう形成されている筒状の部位である。筒部４６３は、径方向外側の外壁面４６４が内壁面１１５に当接している。筒部４６３の底部４６１側とは反対側の端部４６５は、図８に示すように、凹状空間４２０に位置する。 The outer pressing portion 46 is a member formed in a substantially cup shape from metal, and forms the outer shape of the oil seal 45. As shown in FIG. 8, the outer pressing portion 46 is provided so that the bottom portion 461 is located on the bearing 271 side. The bottom portion 461 has a through hole 462 through which the upper shaft 25 can be inserted. The cylindrical portion 463 is a cylindrical portion that is formed to extend from the radial outer side of the bottom portion 461 toward the valve chamber 110. In the cylindrical portion 463, the radially outer outer wall surface 464 is in contact with the inner wall surface 115. The end 465 opposite to the bottom 461 of the cylindrical portion 463 is located in the concave space 420, as shown in FIG.
　内側押さえ部４８は、金属から略カップ状に形成されている部材であって、外側押さえ部４６の内側に収容されている。内側押さえ部４８は、図８に示すように、底部４８１を軸受２７１側に位置するよう設けられている。底部４８１は、底部４６１との間に当接部３２を挟み込み、当接部３２の移動を規制している。底部４８１は、上シャフト２５が挿通可能な通孔４８２を有する。筒部４８３は、底部４８１の径方向外側から弁室１１０に向かって延びるよう形成されている筒状の部位である。筒部４８３は、径方向外側の外壁４８４が外側押さえ部４６の筒部４６３の内壁面４６６に当接している。筒部４８３の底部４８１側とは反対側の端部４８５は、図８に示すように、凹状空間４２０に位置する。
　オイルシール４５は、弁室１１０側に弁室１１０と連通するシール内空間４５０を有する。 The inner pressing portion 48 is a member formed in a substantially cup shape from metal, and is accommodated inside the outer pressing portion 46. As shown in FIG. 8, the inner pressing portion 48 is provided so that the bottom portion 481 is positioned on the bearing 271 side. The bottom portion 481 sandwiches the contact portion 32 with the bottom portion 461 to restrict the movement of the contact portion 32. The bottom portion 481 has a through hole 482 through which the upper shaft 25 can be inserted. The cylindrical portion 483 is a cylindrical portion formed so as to extend toward the valve chamber 110 from the radial outer side of the bottom portion 481. A radially outer wall 484 of the cylindrical portion 483 is in contact with an inner wall surface 466 of the cylindrical portion 463 of the outer pressing portion 46. The end 485 opposite to the bottom 481 side of the cylindrical portion 483 is located in the concave space 420, as shown in FIG.
The oil seal 45 has a seal internal space 450 communicating with the valve chamber 110 on the valve chamber 110 side.
　ケーシング１１１の壁体１１４は、弁室１１０側に突起１１７を有する。具体的には、突起１１７は、壁体１１４の内壁面１１８から弁室１１０に向かって突出するよう形成されている。第二実施形態では、突起１１７は、図８に示すように、外側押さえ部４６の筒部４６３に隣り合うよう形成されている。突起１１７は、外側押さえ部４６の端部４６５及び内側押さえ部４８の端部４８５とともに凹状空間４２０に位置する。 The wall 114 of the casing 111 has a projection 117 on the valve chamber 110 side. Specifically, the projection 117 is formed to project from the inner wall surface 118 of the wall 114 toward the valve chamber 110. In the second embodiment, as shown in FIG. 8, the protrusion 117 is formed to be adjacent to the cylindrical portion 463 of the outer pressing portion 46. The protrusion 117 is located in the concave space 420 together with the end 465 of the outer pressing portion 46 and the end 485 of the inner pressing portion 48.
　第二実施形態では、図８に示すように、上シャフト２５の露出部２５２及び上アーム第二締結部２２３の一部は、シール内空間４５０に位置している。上アーム第二締結部２２３の外壁面２２６と内側押さえ部４８の径方向内側の内壁面４８６との間の距離Ｌ２１は、露出部２５２の外壁面２５３と内側押さえ部４８の内壁面４８６との間の距離Ｌ２２に比べ短い。
　また、距離Ｌ２１は、壁体１１４の内壁面１１８と上アーム第一締結部４２２の弁部材側壁面４２５との間の距離Ｌ２３に比べ長い。 In the second embodiment, as shown in FIG. 8, the exposed portion 252 of the upper shaft 25 and a part of the upper arm second fastening portion 223 are located in the seal inner space 450. A distance L21 between the outer wall surface 226 of the upper arm second fastening portion 223 and the radially inner wall surface 486 of the inner pressing portion 48 is the distance between the outer wall surface 253 of the exposed portion 252 and the inner wall surface 486 of the inner pressing portion 48. The distance L22 is shorter than the distance L22.
Further, the distance L21 is longer than the distance L23 between the inner wall surface 118 of the wall body 114 and the valve member side wall surface 425 of the upper arm first fastening portion 422.
　第二実施形態による弁装置２は、第一実施形態と同じ効果を奏する。
　また、弁装置２では、外側押さえ部４６の端部４６５、内側押さえ部４８の端部４８５及び突起１１７は、凹状空間４２０に位置している。これにより、弁室１１０の気体は、上アーム４２に沿って流れても蛇行しシール内空間４５０に流入しにくくなる。したがって、第二実施形態による弁装置２は、弁室１１０の気体がシール内空間４５０に侵入しにくくなるため、摺動不良の発生を防止することができる。 The valve device 2 according to the second embodiment has the same effect as the first embodiment.
In the valve device 2, the end 465 of the outer pressing portion 46, the end 485 of the inner pressing portion 48, and the protrusion 117 are located in the concave space 420. As a result, the gas in the valve chamber 110 meanders even if it flows along the upper arm 42 and is less likely to flow into the seal inner space 450. Therefore, in the valve device 2 according to the second embodiment, since the gas in the valve chamber 110 is less likely to intrude into the seal inner space 450, the occurrence of the sliding failure can be prevented.
　（第三実施形態）
　次に、第三実施形態による弁装置を図９に基づいて説明する。第三実施形態は、弁部材の上アーム第一締結部、及び、上アーム第一締結部に対向する弁ハウジングの内壁面の形状が第二実施形態と異なる。なお、第一、二実施形態と実質的に同一の部位には同一の符号を付し、説明を省略する。 Third Embodiment
Next, a valve device according to a third embodiment will be described based on FIG. The third embodiment differs from the second embodiment in the shapes of the inner wall surfaces of the valve housing facing the upper arm first fastening portion of the valve member and the upper arm first fastening portion. In addition, the same code | symbol is attached | subjected to the site | part substantially the same as 1st, 2 embodiment, and description is abbreviate | omitted.
　第三実施形態による弁装置３は、弁ハウジング１０、弁部材５０、上シャフト２５、下シャフト２６、二つの軸受２７１，２７２、オイルシール４５、駆動部３５、ギヤ部３７などを備える。 The valve device 3 according to the third embodiment includes a valve housing 10, a valve member 50, an upper shaft 25, a lower shaft 26, two bearings 271, 272, an oil seal 45, a drive unit 35, a gear unit 37, and the like.
　弁部材５０は、弁部材側シール部２１、上アーム５２、及び、下アーム２３を有する。弁部材５０は、高い耐熱性を有する樹脂材料、例えば、ポリフェニレンスルフィドから形成され、弁室１１０において弁ハウジング１０に対して相対回転可能に設けられている。 The valve member 50 has a valve member side seal portion 21, an upper arm 52, and a lower arm 23. The valve member 50 is formed of a resin material having high heat resistance, for example, polyphenylene sulfide, and is provided in the valve chamber 110 so as to be rotatable relative to the valve housing 10.
　上アーム５２は、弁部材側シール部２１の軸方向の端部のうちセンサカバー１１２側に設けられている。上アーム５２は、上アーム部２２１、上アーム第一締結部５２２、及び、上アーム第二締結部２２３を有する。 The upper arm 52 is provided on the sensor cover 112 side in the axial end of the valve member side seal portion 21. The upper arm 52 includes an upper arm portion 221, an upper arm first fastening portion 522, and an upper arm second fastening portion 223.
　上アーム第一締結部５２２は、上アーム部２２１の弁部材５０の回転軸ＲＡ５０上の端部に設けられる略環状の部位である。上アーム第一締結部５２２は、上シャフト２５が圧入される通孔５２４を有する。上アーム第一締結部５２２は、図９に示すように、回転軸ＲＡ５０に沿う方向においてケーシング１１１の壁体１１４に対向するよう形成されている。上アーム第一締結部５２２は、壁体１１４に対向する弁部材側壁面５２５に「弁部材側凹状空間」としての凹状空間４２０，５２０を有する。凹状空間５２０は、回転軸ＲＡ５０から見て凹状空間４２０に比べ遠い側に位置している。
　なお、図９には、便宜的に、上アーム部２２１と上アーム第一締結部５２２、及び、上アーム第一締結部５２２と上アーム第二締結部２２３との境界線を二点鎖線ＶＬ３１，ＶＬ３２で示す。 The upper arm first fastening portion 522 is a substantially annular portion provided at an end of the valve member 50 of the upper arm portion 221 on the rotation axis RA50. The upper arm first fastening portion 522 has a through hole 524 into which the upper shaft 25 is press-fitted. As shown in FIG. 9, the upper arm first fastening portion 522 is formed to face the wall 114 of the casing 111 in the direction along the rotation axis RA50. The upper arm first fastening portion 522 has concave spaces 420 and 520 as a “valve member side concave space” on the valve member side wall surface 525 opposed to the wall body 114. The concave space 520 is located farther from the concave space 420 when viewed from the rotation axis RA50.
In FIG. 9, for convenience, the boundary between the upper arm portion 221 and the upper arm first fastening portion 522, and the upper arm first fastening portion 522 and the upper arm second fastening portion 223 is indicated by a two-dot chain line VL31. , VL 32.
　ケーシング１１１の壁体１１４は、弁室１１０側に二つの突起１１７，１１９を有する。具体的には、突起１１７，１１９は、内壁面１１８から、弁室１１０に向かって突出するよう形成されている。突起１１９は、突起１１７に比べ回転軸ＲＡ５０から離れた側に位置する。突起１１９は、凹状空間５２０に位置する。 The wall 114 of the casing 111 has two projections 117 and 119 on the valve chamber 110 side. Specifically, the projections 117 and 119 are formed to project from the inner wall surface 118 toward the valve chamber 110. The protrusion 119 is located on the side farther from the rotation axis RA 50 than the protrusion 117. The protrusion 119 is located in the concave space 520.
　第三実施形態では、壁体１１４の内壁面１１８と上アーム第一締結部５２２の弁部材側壁面５２５との間の距離Ｌ３３は、距離Ｌ２１に比べ長い。 In the third embodiment, the distance L33 between the inner wall surface 118 of the wall body 114 and the valve member side wall surface 525 of the upper arm first fastening portion 522 is longer than the distance L21.
　第三実施形態による弁装置３は、第一実施形態と同じ効果を奏する。
　また、弁装置３では、弁部材５０は、二つの凹状空間４２０，５２０を有する。凹状空間４２０には、外側押さえ部４６の端部４６５、内側押さえ部４８の端部４８５及び突起１１７が位置し、凹状空間５２０には、突起１１９が位置する。これにより、弁室１１０の気体は、上アーム５２に沿って流れても蛇行しシール内空間４５０に流入しにくくなる。したがって、第三実施形態による弁装置３は、弁室１１０の気体がシール内空間４５０にさらに侵入しにくくなるため、摺動不良の発生をさらに防止することができる。 The valve device 3 according to the third embodiment has the same effect as the first embodiment.
Further, in the valve device 3, the valve member 50 has two concave spaces 420 and 520. The end portion 465 of the outer pressing portion 46, the end portion 485 of the inner pressing portion 48, and the protrusion 117 are located in the recessed space 420, and the protrusion 119 is located in the recessed space 520. As a result, the gas in the valve chamber 110 meanders even if it flows along the upper arm 52 and is less likely to flow into the seal inner space 450. Therefore, in the valve device 3 according to the third embodiment, the gas in the valve chamber 110 is more difficult to intrude into the in-seal space 450, so that the occurrence of the sliding failure can be further prevented.
　（第四実施形態）
　次に、第四実施形態による弁装置を図１０に基づいて説明する。第四実施形態は、弁部材の上アーム第二締結部の形状が第一実施形態と異なる。なお、第一実施形態と実質的に同一の部位には同一の符号を付し、説明を省略する。 Fourth Embodiment
Next, a valve device according to a fourth embodiment will be described based on FIG. The fourth embodiment differs from the first embodiment in the shape of the upper arm second fastening portion of the valve member. In addition, the same code | symbol is attached | subjected to the site | part substantially the same as 1st embodiment, and description is abbreviate | omitted.
　第四実施形態による弁装置４は、弁ハウジング１０、「回転体」としての弁部材６０、上シャフト２５、下シャフト２６、二つの軸受２７１，２７２、オイルシール３０、駆動部３５、ギヤ部３７などを備える。 The valve device 4 according to the fourth embodiment includes a valve housing 10, a valve member 60 as a "rotating member", an upper shaft 25, a lower shaft 26, two bearings 271, 272, an oil seal 30, a drive portion 35, and a gear portion 37. Etc.
　弁部材６０は、弁部材側シール部２１、上アーム６２、及び、下アーム２３を有する。弁部材６０は、高い耐熱性を有する樹脂材料、例えば、ポリフェニレンスルフィドから形成され、弁室１１０において弁ハウジング１０に対して相対回転可能に設けられている。 The valve member 60 has a valve member side seal portion 21, an upper arm 62, and a lower arm 23. The valve member 60 is formed of a resin material having high heat resistance, for example, polyphenylene sulfide, and is provided so as to be rotatable relative to the valve housing 10 in the valve chamber 110.
　上アーム６２は、弁部材側シール部２１の回転軸ＲＡ６０に沿う方向の端部のうちセンサカバー１１２側の端部に設けられている。上アーム６２は、上アーム部２２１、上アーム第一締結部２２２、及び、上アーム第二締結部６２３を有する。 The upper arm 62 is provided at an end of the valve member side seal portion 21 in the direction along the rotation axis RA60 at an end on the sensor cover 112 side. The upper arm 62 includes an upper arm portion 221, an upper arm first fastening portion 222, and an upper arm second fastening portion 623.
　上アーム第二締結部６２３は、上アーム第一締結部２２２の上アーム部２２１とは反対側に設けられている略環状の部位である。上アーム第二締結部６２３の外径は、上アーム第一締結部２２２の外径に比べ小さい。上アーム第二締結部６２３は、上シャフト２５が圧入される通孔６２５を有する。
　なお、図９には、便宜的に、上アーム部２２１と上アーム第一締結部２２２、及び、上アーム第一締結部２２２と上アーム第二締結部６２３との境界線を二点鎖線ＶＬ１１，ＶＬ４２で示す。 The upper arm second fastening portion 623 is a substantially annular portion provided on the opposite side of the upper arm portion 221 of the upper arm first fastening portion 222. The outer diameter of the upper arm second fastening portion 623 is smaller than the outer diameter of the upper arm first fastening portion 222. The upper arm second fastening portion 623 has a through hole 625 into which the upper shaft 25 is press-fitted.
In FIG. 9, for convenience, the boundary between the upper arm portion 221 and the upper arm first fastening portion 222, and the upper arm first fastening portion 222 and the upper arm second fastening portion 623 is indicated by a two-dot chain line VL11. , VL 42.
　上アーム第二締結部６２３は、軸受２７１側の端面６２４に「回転体突起」としての突起６２７を有する。突起６２７は、端面６２４から弁室１１０とは反対の方向に延びるよう形成されている。 The upper arm second fastening portion 623 has a projection 627 as a “rotor projection” on the end surface 624 on the bearing 271 side. The protrusion 627 is formed to extend from the end surface 624 in the direction opposite to the valve chamber 110.
　第四実施形態では、図１０に示すように、上シャフト２５の露出部２５２及び上アーム第二締結部６２３の一部は、シール内空間３００に位置している。上アーム第二締結部６２３の径方向外側の外壁面６２６と内側押さえ部３３の内壁面３３５との間の距離Ｌ４１は、露出部２５２の外壁面２５３と内側押さえ部３３の内壁面３３５との間の距離Ｌ４２に比べ短い。
　また、距離Ｌ４１は、壁体１１４の内壁面１１８と上アーム第一締結部２２２の弁部材側壁面２２７との間の距離Ｌ１３に比べ長い。 In the fourth embodiment, as shown in FIG. 10, the exposed portion 252 of the upper shaft 25 and a part of the upper arm second fastening portion 623 are located in the seal inner space 300. A distance L41 between the radially outer outer wall surface 626 of the upper arm second fastening portion 623 and the inner wall surface 335 of the inner pressing portion 33 is the distance between the outer wall surface 253 of the exposed portion 252 and the inner wall surface 335 of the inner pressing portion 33. It is shorter than the distance L42.
Further, the distance L41 is longer than the distance L13 between the inner wall surface 118 of the wall body 114 and the valve member side wall surface 227 of the upper arm first fastening portion 222.
　第四実施形態による弁装置４は、第一実施形態と同じ効果を奏する。
　また、弁装置４では、弁部材６０は、シール内空間３００において弁室１１０とは反対の方向に延びるよう形成されている突起６２７を有する。これにより、シール内空間３００に流入した気体は、シール内空間３００において蛇行するため、オイルシール３０と上シャフト２５との間に流入しにくくなる。したがって、第四実施形態による弁装置４は、摺動不良の発生を防止することができる。 The valve device 4 according to the fourth embodiment has the same effect as that of the first embodiment.
Further, in the valve device 4, the valve member 60 has a protrusion 627 formed to extend in the seal inner space 300 in the direction opposite to the valve chamber 110. As a result, the gas flowing into the seal inner space 300 meanders in the seal inner space 300, and therefore, it is difficult for the gas to flow between the oil seal 30 and the upper shaft 25. Therefore, the valve device 4 according to the fourth embodiment can prevent the occurrence of the sliding failure.
　（第五実施形態）
　次に、第五実施形態による弁装置を図１１に基づいて説明する。第五実施形態は、弁部材の上アーム第二締結部の形状が第三実施形態と異なる。なお、第三実施形態と実質的に同一の部位には同一の符号を付し、説明を省略する。 (Fifth embodiment)
Next, a valve device according to a fifth embodiment will be described based on FIG. The fifth embodiment differs from the third embodiment in the shape of the upper arm second fastening portion of the valve member. The same reference numerals as in the third embodiment denote the same parts, and a description thereof will be omitted.
　第五実施形態による弁装置５は、弁ハウジング１０、「回転体」としての弁部材７０、上シャフト２５、下シャフト２６、二つの軸受２７１，２７２、オイルシール４５、駆動部３５、ギヤ部３７などを備える。 The valve device 5 according to the fifth embodiment includes a valve housing 10, a valve member 70 as a "rotating member", an upper shaft 25, a lower shaft 26, two bearings 271 and 272, an oil seal 45, a drive portion 35, and a gear portion 37. Etc.
　弁部材７０は、弁部材側シール部２１、上アーム７２、及び、下アーム２３を有する。弁部材７０は、高い耐熱性を有する樹脂材料、例えば、ポリフェニレンスルフィドから形成され、弁室１１０において弁ハウジング１０に対して相対回転可能に設けられている。 The valve member 70 has a valve member side seal portion 21, an upper arm 72, and a lower arm 23. The valve member 70 is formed of a resin material having high heat resistance, for example, polyphenylene sulfide, and is provided rotatably in the valve chamber 110 relative to the valve housing 10.
　上アーム７２は、弁部材側シール部２１の回転軸ＲＡ７０に沿う方向の端部のうちセンサカバー１１２側の端部に設けられている。上アーム７２は、上アーム部２２１、上アーム第一締結部５２２、及び、上アーム第二締結部７２３を有する。 The upper arm 72 is provided at an end of the valve member side seal portion 21 in the direction along the rotation axis RA 70 at an end on the sensor cover 112 side. The upper arm 72 includes an upper arm portion 221, an upper arm first fastening portion 522, and an upper arm second fastening portion 723.
　上アーム第二締結部７２３は、上アーム第一締結部５２２の上アーム部２２１とは反対側に設けられている略環状の部位である。上アーム第二締結部７２３の外径は、上アーム第一締結部５２２の外径に比べ小さい。上アーム第二締結部７２３は、上シャフト２５が圧入される通孔７２５を有する。
　なお、図１１には、便宜的に、上アーム部２２１と上アーム第一締結部５２２、及び、上アーム第一締結部５２２と上アーム第二締結部７２３との境界線を二点鎖線ＶＬ５１，ＶＬ５２で示す。 The upper arm second fastening portion 723 is a substantially annular portion provided on the opposite side of the upper arm portion 221 of the upper arm first fastening portion 522. The outer diameter of the upper arm second fastening portion 723 is smaller than the outer diameter of the upper arm first fastening portion 522. The upper arm second fastening portion 723 has a through hole 725 through which the upper shaft 25 is press-fitted.
In FIG. 11, for convenience, the boundary between the upper arm portion 221 and the upper arm first fastening portion 522, and the upper arm first fastening portion 522 and the upper arm second fastening portion 723 is indicated by a two-dot chain line VL51. , VL 52.
　上アーム第二締結部７２３は、軸受２７１側の端面７２４に「回転体突起」としての突起７２７を有する。突起７２７は、端面７２４から弁室１１０とは反対の方向に延びるよう形成されている。 The upper arm second fastening portion 723 has a projection 727 as a “rotor projection” on the end surface 724 on the bearing 271 side. The protrusion 727 is formed to extend from the end surface 724 in the direction opposite to the valve chamber 110.
　第五実施形態では、図１１に示すように、上シャフト２５の露出部２５２及び上アーム第二締結部７２３の一部は、シール内空間４５０に位置している。上アーム第二締結部７２３の径方向外側の外壁面７２６と内側押さえ部４８の内壁面４８６との間の距離Ｌ５１は、露出部２５２の外壁面２５３と内側押さえ部４８の内壁面４８６との間の距離Ｌ５２に比べ短い。
　また、距離Ｌ５１は、壁体１１４の内壁面１１８と上アーム第一締結部５２２の弁部材側壁面５２５との間の距離Ｌ３３に比べ長い。 In the fifth embodiment, as shown in FIG. 11, the exposed portion 252 of the upper shaft 25 and a part of the upper arm second fastening portion 723 are located in the seal inner space 450. A distance L51 between the radially outer outer wall surface 726 of the upper arm second fastening portion 723 and the inner wall surface 486 of the inner pressing portion 48 is the distance between the outer wall surface 253 of the exposed portion 252 and the inner wall surface 486 of the inner pressing portion 48. It is shorter than the distance L52.
Further, the distance L51 is longer than the distance L33 between the inner wall surface 118 of the wall body 114 and the valve member side wall surface 525 of the upper arm first fastening portion 522.
　第五実施形態による弁装置５は、第一実施形態と同じ効果を奏する。
　第五実施形態による弁装置５では、弁部材７０は、外側押さえ部４６の端部４６５、内側押さえ部４８の端部４８５及び突起１１７が位置する凹状空間４２０、並びに、突起１１９が位置する凹状空間５２０を有する。また、弁部材７０は、シール内空間４５０において弁室１１０とは反対の方向に延びるよう形成されている突起７２７を有する。これらにより、弁室１１０の気体は、上アーム７２に沿って流れても蛇行しシール内空間４５０に流入しにくくなるだけでなく、シール内空間４５０においても蛇行するため、オイルシール３０と上シャフト２５との間に流入しにくくなる。したがって、第五実施形態による弁装置５は、摺動不良の発生をさらに防止することができる。 The valve device 5 according to the fifth embodiment has the same effect as that of the first embodiment.
In the valve device 5 according to the fifth embodiment, the valve member 70 includes the end 465 of the outer pressing portion 46, the end 485 of the inner pressing portion 48 and the concave space 420 where the projection 117 is located, and the concave where the projection 119 is located. There is a space 520. Also, the valve member 70 has a projection 727 formed to extend in the seal inner space 450 in the opposite direction to the valve chamber 110. As a result, the gas in the valve chamber 110 meanders even when flowing along the upper arm 72 and becomes difficult to flow into the seal inner space 450, and also meanders in the seal inner space 450, so the oil seal 30 and the upper shaft It becomes difficult to flow between 25 and. Therefore, the valve device 5 according to the fifth embodiment can further prevent the occurrence of the sliding failure.
　（第六実施形態）
　次に、第六実施形態による弁装置を図１２に基づいて説明する。第六実施形態は、弁部材の形状及び上シャフトの形状が第一実施形態と異なる。なお、第一実施形態と実質的に同一の部位には同一の符号を付し、説明を省略する。 Sixth Embodiment
Next, a valve device according to a sixth embodiment will be described based on FIG. The sixth embodiment differs from the first embodiment in the shape of the valve member and the shape of the upper shaft. In addition, the same code | symbol is attached | subjected to the site | part substantially the same as 1st embodiment, and description is abbreviate | omitted.
　第六実施形態による弁装置６は、弁ハウジング１０、「回転体」としての弁部材８０、上シャフト８５、下シャフト２６、二つの軸受２７１，２７２、オイルシール３０、駆動部３５、ギヤ部３７などを備える。 The valve device 6 according to the sixth embodiment includes a valve housing 10, a valve member 80 as a "rotating member", an upper shaft 85, a lower shaft 26, two bearings 271, 272, an oil seal 30, a drive portion 35, and a gear portion 37. Etc.
　弁部材８０は、弁部材側シール部２１、上アーム８２、及び、下アーム２３を有する。弁部材８０は、高い耐熱性を有する樹脂材料、例えば、ポリフェニレンスルフィドから形成され、弁室１１０において弁ハウジング１０に対して相対回転可能に設けられている The valve member 80 has a valve member side seal portion 21, an upper arm 82, and a lower arm 23. The valve member 80 is formed of a resin material having high heat resistance, for example, polyphenylene sulfide, and is provided rotatably in the valve chamber 110 relative to the valve housing 10
　上アーム８２は、弁部材側シール部２１の回転軸ＲＡ８０に沿う方向の端部のうちセンサカバー１１２側の端部に設けられている。上アーム２２は、上アーム部２２１、及び、上アーム締結部８２２を有する。
　上アーム締結部８２２は、上アーム部２２１の弁部材８０の回転軸ＲＡ８０上の端部に設けられる略環状の部位である。上アーム締結部８２２は、上シャフト８５が圧入される通孔８２４を有する。上アーム締結部８２２は、図１２に示すように、回転軸ＲＡ８０に沿う方向においてケーシング１１１の壁体１１４に対向するよう形成されている。
　なお、図１２には、便宜的に、上アーム部２２１と上アーム締結部８２２との境界線を二点鎖線ＶＬ６１で示す。 The upper arm 82 is provided at an end of the valve member side seal portion 21 in the direction along the rotation axis RA 80 at an end on the sensor cover 112 side. The upper arm 22 has an upper arm portion 221 and an upper arm fastening portion 822.
The upper arm fastening portion 822 is a substantially annular portion provided at an end of the valve member 80 of the upper arm portion 221 on the rotation axis RA80. The upper arm fastening portion 822 has a through hole 824 into which the upper shaft 85 is press-fitted. The upper arm fastening portion 822 is formed to face the wall 114 of the casing 111 in the direction along the rotation axis RA80, as shown in FIG.
In FIG. 12, for convenience, a boundary between the upper arm portion 221 and the upper arm fastening portion 822 is indicated by a two-dot chain line VL61.
　上シャフト８５は、ステンレスから形成されている略棒状の部材である。上シャフト８５は、上アーム締結部８２２に締結されることによって、弁部材８０と一体に回転可能に設けられている。上シャフト８５は、図１２に示すように、上アーム８２の回転軸ＲＡ８０上の端部から下シャフト２６とは反対の方向に延びるよう形成されている。上シャフト８５は、ケーシング１１１の通孔１０１に挿入され、軸受２７１に回転可能に支持されている。 The upper shaft 85 is a substantially rod-like member formed of stainless steel. The upper shaft 85 is rotatably provided integrally with the valve member 80 by being fastened to the upper arm fastening portion 822. The upper shaft 85 is formed to extend from the end of the upper arm 82 on the rotation axis RA 80 in the direction opposite to the lower shaft 26, as shown in FIG. The upper shaft 85 is inserted into the through hole 101 of the casing 111 and rotatably supported by the bearing 271.
　上シャフト８５は、挿入部８５１、「第一回転部」としての露出部８５２、及び、「第二回部」としての大径部８５３を有する。
　挿入部８５１は、軸受２７１内に位置する部位である。
　露出部８５２は、挿入部８５１の弁室１１０側に設けられ、シール内空間３００に位置する部位である。露出部８５２の径方向外側の外壁面８５４の一部は、シール内空間３００において露出している。
　大径部８５３は、露出部８５２の弁室１１０側に設けられ、シール内空間３００に位置する部位である。大径部８５３は、外径が露出部８５２の外径に比べ大きくなるよう形成されている。大径部８５３は、上アーム締結部８２２に締結されている。これにより、上シャフト８５と弁部材８０とは一体に回転可能である。
　なお、図１２には、便宜的に、露出部８５２と大径部８５３との境界線を二点鎖線ＶＬ６２で示す。 The upper shaft 85 has an insertion portion 851, an exposed portion 852 as a “first rotation portion”, and a large diameter portion 853 as a “second rotation portion”.
The insertion portion 851 is a portion located in the bearing 271.
The exposed portion 852 is a portion provided on the valve chamber 110 side of the insertion portion 851 and located in the seal inner space 300. A part of the radially outer surface 854 of the exposed portion 852 is exposed in the seal inner space 300.
The large diameter portion 853 is a portion provided on the valve chamber 110 side of the exposed portion 852 and located in the seal inner space 300. The large diameter portion 853 is formed such that the outer diameter is larger than the outer diameter of the exposed portion 852. The large diameter portion 853 is fastened to the upper arm fastening portion 822. Thereby, the upper shaft 85 and the valve member 80 can be integrally rotated.
In FIG. 12, for convenience, the boundary between the exposed portion 852 and the large diameter portion 853 is indicated by a two-dot chain line VL62.
　第六実施形態では、大径部８５３の径方向外側の外壁面８５５と内側押さえ部３３の内壁面３３５との間の距離Ｌ６１は、露出部８５２の外壁面８５４と内側押さえ部３３の内壁面３３５との間の距離Ｌ６２に比べ短い。
　また、距離Ｌ６１は、内壁面１１８と内壁面１１８に対向する上アーム締結部８２２の弁部材側壁面８２５との間の距離Ｌ６３に比べ短い。 In the sixth embodiment, the distance L61 between the radially outer outer wall surface 855 of the large diameter portion 853 and the inner wall surface 335 of the inner pressing portion 33 is the outer wall surface 854 of the exposed portion 852 and the inner wall surface of the inner pressing portion 33. It is shorter than the distance L62 between it and 335.
Further, the distance L61 is shorter than the distance L63 between the inner wall surface 118 and the valve member side wall surface 825 of the upper arm fastening portion 822 opposed to the inner wall surface 118.
　第六実施形態では、シール内空間３００において、大径部８５３の外壁面８５５と内側押さえ部３３の内壁面３３５との間の距離Ｌ６１は、露出部８５２の外壁面８５４と内側押さえ部３３の内壁面３３５との間の距離Ｌ６２に比べ短くなっている。これにより、弁室１１０の気体は、大径部８５３の外壁面８５５と内側押さえ部３３の内壁面３３５との間を通りにくくなるため、シール内空間３００に侵入する弁室１１０の気体の量を比較的少なくすることができる。
　また、距離Ｌ６１は、内壁面１１８と内壁面１１８に対向する上アーム締結部８２２の弁部材側壁面８２５との間の距離Ｌ６３に比べ短い。壁体１１４の内壁面１１８と上アーム締結部８２２の弁部材側壁面８２５との間を流れる気体は、狭くなる大径部８５３の外壁面８５５と内側押さえ部３３の内壁面３３５との間に流入するとき流速が低下する。これにより、弁室１１０の気体は、シール内空間３００の露出部８５２の外壁面８５４と内側押さえ部３３の内壁面３３５との間や通孔１０１に挿通されている上シャフト２５と壁体１１４との間に侵入しにくくなる。したがって、第六実施形態による弁装置６は、第一実施形態と同じ効果を奏する。 In the sixth embodiment, the distance L61 between the outer wall surface 855 of the large diameter portion 853 and the inner wall surface 335 of the inner pressing portion 33 in the seal inner space 300 is the distance between the outer wall surface 854 of the exposed portion 852 and the inner pressing portion 33. The distance L62 to the inner wall surface 335 is shorter than the distance L62. As a result, the gas in the valve chamber 110 is less likely to pass between the outer wall surface 855 of the large diameter portion 853 and the inner wall surface 335 of the inner pressing portion 33, so the amount of gas in the valve chamber 110 entering the seal inner space 300 Can be reduced relatively.
Further, the distance L61 is shorter than the distance L63 between the inner wall surface 118 and the valve member side wall surface 825 of the upper arm fastening portion 822 opposed to the inner wall surface 118. The gas flowing between the inner wall surface 118 of the wall 114 and the valve member side wall surface 825 of the upper arm fastening portion 822 is between the outer wall surface 855 of the large diameter portion 853 and the inner wall surface 335 of the inner pressing portion 33 As it flows in, the flow velocity decreases. Thereby, the gas of the valve chamber 110 is inserted between the outer wall surface 854 of the exposed portion 852 of the seal inner space 300 and the inner wall surface 335 of the inner pressing portion 33 or into the through hole 101. It becomes difficult to invade between. Therefore, the valve device 6 according to the sixth embodiment has the same effect as the first embodiment.
　　（他の実施形態）
　上述の実施形態では、弁装置は、「流体」として排気の流れを制御するものであるとした。しかしながら、流体は、これに限定されない。 (Other embodiments)
In the above embodiment, the valve device controls the flow of the exhaust as "fluid". However, the fluid is not limited to this.
　第二実施形態に、第五実施形態の「回転体突起」を適用してもよい。 The “rotor protrusion” of the fifth embodiment may be applied to the second embodiment.
　第二、三、五実施形態では、弁ハウジング及びオイルシールが弁室に突出する部位を有し、弁部材が当該突出する部位が位置する凹状空間を有するとした。しかしながら、突出する部位と凹状空間との関係はこれに限定されない。
　図１３に第二実施形態の変形例を示す。
　図１３に示す弁装置７は、弁ハウジング１０、弁部材２０、上シャフト２５、下シャフト２６、二つの軸受２７１，２７２、オイルシール３０、駆動部３５、ギヤ部３７などを備える。
　弁部材２０が有する上アーム第一締結部２２２は、壁体１１４に対向する弁部材側壁面２２７に「弁部材側突起」としての突起２２８を有する。突起２２８は、弁部材側壁面２２７から壁体１１４に向かう方向に延びるよう形成されている。
　ケーシング１１１の壁体１１４には、「ハウジング側凹状空間」としての凹状空間１２０が形成されている。凹状空間１２０は、壁体１１４の内壁面１１８に形成されている。突起２２８は、凹状空間１２０に位置する。
　図１３に示す変形例の場合、弁室１１０の気体は、上アーム４２に沿って流れても凹状空間１２０において突起２２８によって蛇行するため、シール内空間３００に流入しにくくなる。これにより、図１３にしめす変形例は、第二実施形態と同じ効果を奏する。
　また、図１３にしめす変形例において、第三実施形態の複数の突起と凹状空間との組み合わせを適用してもよいし、第五実施形態の回転体突起を適用してもよい。 In the second, third, and fifth embodiments, the valve housing and the oil seal have a portion that protrudes into the valve chamber, and the valve member has a concave space in which the protruding portion is located. However, the relationship between the protruding portion and the concave space is not limited to this.
FIG. 13 shows a modification of the second embodiment.
The valve device 7 shown in FIG. 13 includes a valve housing 10, a valve member 20, an upper shaft 25, a lower shaft 26, two bearings 271, 272, an oil seal 30, a drive unit 35, a gear unit 37, and the like.
The upper arm first fastening portion 222 of the valve member 20 has a protrusion 228 as a “valve member side protrusion” on the valve member side wall surface 227 facing the wall body 114. The projection 228 is formed to extend in the direction from the valve member side wall surface 227 toward the wall 114.
The wall 114 of the casing 111 is formed with a concave space 120 as a “housing side concave space”. The concave space 120 is formed on the inner wall surface 118 of the wall 114. The protrusion 228 is located in the concave space 120.
In the case of the modified example shown in FIG. 13, the gas in the valve chamber 110 flows along the upper arm 42 and is meandered by the projections 228 in the concave space 120, so it is difficult to flow into the seal inner space 300. Thereby, the modification shown in FIG. 13 has the same effect as that of the second embodiment.
Further, in the modification shown in FIG. 13, the combination of the plurality of projections and the concave space of the third embodiment may be applied, or the rotor projection of the fifth embodiment may be applied.
　第六実施形態に、第二実施形態の突起と凹状空間との組み合わせ、第三実施形態の複数の突起と凹状空間との組み合わせ、及び、第五実施形態の回転体突起を適用してもよい。 The combination of the protrusion and the concave space of the second embodiment, the combination of the plurality of protrusions and the concave space of the third embodiment, and the rotor protrusion of the fifth embodiment may be applied to the sixth embodiment. .
　以上、本開示はこのような実施形態に限定されるものではなく、その要旨を逸脱しない範囲で種々の形態で実施可能である。 As mentioned above, this indication is not limited to such an embodiment, and can be carried out with various forms in the range which does not deviate from the gist.
　本開示は、実施例に準拠して記述された。しかしながら、本開示は当該実施形態および構造に限定されるものではない。本開示は、様々な変形例および均等の範囲内の変形をも包含する。また、様々な組み合わせおよび形態、さらには、それらに一要素のみ、それ以上、あるいはそれ以下、を含む他の組み合わせおよび形態も、本開示の範疇や思想範囲に入るものである。 The present disclosure has been described in accordance with the examples. However, the present disclosure is not limited to the embodiments and structures. The present disclosure also includes various modifications and variations within the scope of equivalents. In addition, various combinations and forms, and further, other combinations and forms including only one element, more than or less than one element, and the like are also included in the scope and the scope of the present disclosure.

Claims (7)

  1. 　流体を流通可能な複数の流路（１２，１３，１４）、及び、複数の前記流路を連通する連通空間（１１０）を有する弁ハウジング（１０）と、
    　前記連通空間に前記弁ハウジングに対して相対回転可能に設けられ、複数の前記流路の一の流路（１４）と前記連通空間とを連通する開口の縁部に当接すると前記一の流路と前記連通空間とを遮断可能な回転体（２０，２５，２６，４０，５０，６０，７０，８０，８５）と、
    　前記回転体の一部（２５，８５）が挿通される通孔（１０１）を形成する前記弁ハウジングの壁体（１１４）に設けられ、前記回転体を回転可能に支持する軸受（２７１）と、
    　前記壁体の前記通孔を形成する内壁において前記軸受の前記連通空間側に設けられ、前記連通空間側に前記連通空間に連通するシール内空間（３００，４５０）を有するシール部（３０，４５）と、
    　を備え、
    　前記回転体は、前記シール内空間に位置する第一回転部（２５２，８５２）、及び、前記第一回転部の前記連通空間側に設けられ前記シール内空間に位置する第二回転部（２２３，８５３）を有し、
    　前記第二回転部の径方向外側の外壁面（２２６，６２６，７２６，８５５）と前記シール内空間を形成する前記シール部の径方向内側の内壁面（３３５，４８６）との間の距離（Ｌ１１，Ｌ２１，Ｌ４１，Ｌ５１，Ｌ６１）は、前記第一回転部の径方向外側の外壁面（２５３，８５４）と前記シール部の前記内壁面との間の距離（Ｌ１２，Ｌ２２，Ｌ４２，Ｌ５２，Ｌ６２）に比べ短い弁装置。     A valve housing (10) having a plurality of flow paths (12, 13, 14) through which fluid can flow, and a communication space (110) communicating the plurality of flow paths;
    The first flow is provided in the communication space so as to be relatively rotatable with respect to the valve housing, and abuts on an edge of an opening that connects the flow path (14) of the plurality of flow paths and the communication space. A rotating body (20, 25, 26, 40, 50, 60, 70, 80, 85) capable of blocking the passage and the communication space;
    A bearing (271) provided in a wall (114) of the valve housing defining a through hole (101) through which a part (25, 85) of the rotating body is inserted, and rotatably supporting the rotating body ,
    A seal portion (30, 45) provided on the inner wall forming the through hole of the wall on the communication space side of the bearing, and having a seal inner space (300, 450) on the communication space side communicating with the communication space. )When,
    Equipped with
    The rotating body is a first rotating portion (252, 852) located in the inner space of the seal, and a second rotating portion (223) provided on the communication space side of the first rotating portion and located in the inner space of the seal , 853),
    The distance between the radially outer outer wall surface (226, 626, 726, 855) of the second rotating portion and the radially inner inner wall surface (335, 486) of the seal portion forming the in-seal space ( L11, L21, L41, L51, L61) are the distance (L12, L22, L42, L52) between the radially outer surface (253, 854) of the first rotating portion and the inner wall surface of the sealing portion , L62) short valve device.
  2. 　前記回転体は、前記開口の縁部に当接可能な弁部材（２０）、及び、前記弁部材と一体に回転可能に設けられ前記通孔に挿通されるシャフト（２５，２６）を有し、
    　前記第二回転部は、前記弁部材が有する請求項１に記載の弁装置。     The rotary body has a valve member (20) capable of abutting on the edge of the opening, and a shaft (25, 26) rotatably provided integrally with the valve member and inserted through the through hole. ,
    The valve device according to claim 1, wherein the second rotating portion is included in the valve member.
  3. 　前記シール部は、前記弁ハウジングの前記シール部を支持するシール部支持壁面（１１５）に接続しかつ前記弁部材に対向するハウジング側隣接壁面（１１８）から、前記弁部材の回転軸（ＲＡ２０）に沿う方向に突出する端部（４６５，４８５）を有し、
    　前記ハウジング側隣接壁面に対向する前記弁部材の弁部材側壁面（４２５）は、前記ハウジング側隣接壁面とは反対側に凹み前記シール部の端部が位置する弁部材側凹状空間（４２０）を有する請求項２に記載の弁装置。     The seal portion is connected to a seal portion support wall surface (115) supporting the seal portion of the valve housing, and a housing side adjacent wall surface (118) opposed to the valve member, the rotary shaft (RA20) of the valve member Has an end (465, 485) projecting in the direction along the
    The valve member side wall surface (425) of the valve member facing the housing-side adjacent wall surface is recessed on the opposite side to the housing-side adjacent wall surface, and the valve member-side concave space (420) in which the end of the seal portion is located The valve device according to claim 2 having.
  4. 　前記弁ハウジングにおいて前記シール部を支持するシール部支持壁面（１１５）に接続しかつ前記弁部材に対向するハウジング側隣接壁面（１１８）は、前記弁部材に向かって突出するハウジング側突起（１１７，１１９）、または、前記弁部材とは反対側に凹むハウジング側凹状空間（１２０）を有し、
    　前記ハウジング側隣接壁面に対向する前記弁部材の弁部材側壁面（２２７，４２５）は、前記ハウジング側隣接壁面とは反対側に凹み前記ハウジング側突起が位置する弁部材側凹状空間（４２０，５２０）、または、前記ハウジング側隣接壁面に向かって突出し前記ハウジング側凹状空間に位置する弁部材側突起（２２８）を有する請求項２または３に記載の弁装置。     The housing side adjacent wall surface (118) connected to the seal portion supporting wall surface (115) supporting the seal portion in the valve housing and facing the valve member is a housing side protrusion (117, 119) or a housing-side recessed space (120) recessed on the opposite side to the valve member,
    The valve member side wall surface (227, 425) of the valve member facing the housing side adjacent wall surface is recessed on the opposite side to the housing side adjacent wall surface, and the valve member side concave space (420, 520) The valve device according to claim 2 or 3, further comprising: a valve member side protrusion (228) which protrudes toward the housing side adjacent wall surface and is located in the housing side concave space.
  5. 　前記ハウジング側隣接壁面は、少なくとも二つ以上の前記ハウジング側突起または前記ハウジング側凹状空間を有し、
    　前記弁部材側壁面は、前記ハウジング側突起が位置する少なくとも二つ以上の前記弁部材側凹状空間、または、前記ハウジング側凹状空間に位置する少なくとも二つ以上の前記弁部材側突起を有する請求項４に記載の弁装置。     The housing side adjacent wall surface has at least two or more of the housing side protrusions or the housing side concave space,
    The valve member side wall surface has at least two or more of the valve member-side concave spaces in which the housing-side projections are located, or at least two or more of the valve member-side projections located in the housing-side concave spaces. The valve device according to 4.
  6. 　前記回転体は、前記開口の縁部に当接可能な弁部材、及び、前記弁部材と一体に回転可能に設けられ前記通孔に挿通されているシャフトを有し、
    　前記第二回転部は、前記シャフトが有する請求項１に記載の弁装置。     The rotary body has a valve member that can be in contact with an edge of the opening, and a shaft provided rotatably integrally with the valve member and inserted through the through hole.
    The valve device according to claim 1, wherein the second rotating portion is included in the shaft.
  7. 　前記第二回転部は、前記シール内空間において前記回転体の回転軸（ＲＡ２０）に沿う方向に延びるよう形成される回転体突起（６２７，７２７）を有する請求項１～６のいずれか一項に記載の弁装置。 The said 2nd rotation part has a rotation body protrusion (627, 727) formed so that it may extend in the direction in alignment with the rotation axis (RA20) of the said rotation body in the space in said seal | sticker. The valve device according to.
PCT/JP2018/032535 2017-09-05 2018-09-03 Valve device WO2019049811A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61215878A (en) * 1985-03-20 1986-09-25 Hitachi Ltd Sealing device for butterfly valve shaft
JPS6340682U (en) * 1986-08-29 1988-03-16
US5407176A (en) * 1993-08-12 1995-04-18 Nevrekar; Venkatesh R. Back-seating of rotary valve stem
JP2014169668A (en) * 2013-03-05 2014-09-18 Denso Corp Fluid control valve

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Publication number Priority date Publication date Assignee Title
JP5304995B2 (en) * 2008-09-09 2013-10-02 Ｎｏｋ株式会社 Mounting method of sealing device
JP5924247B2 (en) * 2012-11-27 2016-05-25 株式会社デンソー Valve device
JP5991293B2 (en) 2013-09-18 2016-09-14 株式会社デンソー Valve device
JP2017170244A (en) 2017-07-07 2017-09-28 株式会社ユニバーサルエンターテインメント Game machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61215878A (en) * 1985-03-20 1986-09-25 Hitachi Ltd Sealing device for butterfly valve shaft
JPS6340682U (en) * 1986-08-29 1988-03-16
US5407176A (en) * 1993-08-12 1995-04-18 Nevrekar; Venkatesh R. Back-seating of rotary valve stem
JP2014169668A (en) * 2013-03-05 2014-09-18 Denso Corp Fluid control valve

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