WO2020262244A1 - Differential pressure valve - Google Patents

Differential pressure valve Download PDF

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Publication number
WO2020262244A1
WO2020262244A1 PCT/JP2020/024177 JP2020024177W WO2020262244A1 WO 2020262244 A1 WO2020262244 A1 WO 2020262244A1 JP 2020024177 W JP2020024177 W JP 2020024177W WO 2020262244 A1 WO2020262244 A1 WO 2020262244A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
valve body
differential pressure
valve chamber
peripheral surface
Prior art date
Application number
PCT/JP2020/024177
Other languages
French (fr)
Japanese (ja)
Inventor
進 藤谷
智也 沼倉
Original Assignee
日立オートモティブシステムズ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日立オートモティブシステムズ株式会社 filed Critical 日立オートモティブシステムズ株式会社
Priority to JP2021526928A priority Critical patent/JP7221388B2/en
Priority to CN202080024059.8A priority patent/CN113661343A/en
Publication of WO2020262244A1 publication Critical patent/WO2020262244A1/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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
    • B61F5/04—Bolster supports or mountings
    • B61F5/10—Bolster supports or mountings incorporating fluid springs
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F16F9/04—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F16F9/348—Throttling passages in the form of annular discs or other plate-like elements which may or may not have a spring action, operating in opposite directions or singly, e.g. annular discs positioned on top of the valve or piston body
    • F16F9/3488—Throttling passages in the form of annular discs or other plate-like elements which may or may not have a spring action, operating in opposite directions or singly, e.g. annular discs positioned on top of the valve or piston body characterised by features intended to affect valve bias or pre-stress
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
    • 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
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/06—Check valves with guided rigid valve members with guided stems

Definitions

  • the present invention relates to a differential pressure valve.
  • the present application claims priority based on Japanese Patent Application No. 2019-118690 filed in Japan on June 26, 2019, the contents of which are incorporated herein by reference.
  • the present invention provides a differential pressure valve capable of suppressing variations in valve opening pressure.
  • the differential pressure valve is formed in the valve chamber, the circular valve body provided in the valve chamber, and the bottom of the valve chamber, and the air of one of the air springs flows in.
  • the valve body is formed on the inner peripheral surface of the valve chamber to flow out air to the other air spring, and is formed at the bottom of the valve chamber so as to surround the inlet. It has a seat portion to be seated and an urging member for urging the valve body toward the seat portion in a valve closing direction.
  • the valve body is provided with a first flange portion extending radially outward from the seat portion on the bottom portion side.
  • the first flange portion includes a plurality of first protruding portions that project radially outward toward the inner peripheral surface of the valve chamber, and radially inward at positions opposite to the circumferential direction of the first protruding portion. It is provided with a first recess that is recessed.
  • the differential pressure valve is formed in the valve chamber, the circular valve body provided in the valve chamber, and the bottom of the valve chamber, and the air of one of the air springs flows in.
  • the valve body is formed on the inner peripheral surface of the valve chamber to flow out air to the other air spring, and is formed at the bottom of the valve chamber so as to surround the inlet. It has a seat portion to be seated and an urging member for urging the valve body toward the seat portion in a valve closing direction.
  • the valve body is provided with a first flange portion that extends radially outward from the seat portion on the bottom side, and is radially opposite to the bottom portion toward the inner peripheral surface of the valve chamber. It is equipped with a second brim that extends outward.
  • the first flange portion includes a plurality of first projecting portions that project radially outward toward the inner peripheral surface of the valve chamber.
  • the second flange portion is provided with a plurality of second protruding portions that project radially outward toward the inner peripheral surface of the valve chamber at a position deviated from the first protruding portion in the circumferential direction.
  • the differential pressure valve 11 has a metal housing 12.
  • the housing 12 has two first seats 15 and a second seat 16 arranged side by side on the outer surface.
  • the outer seat surfaces of the first seat portion 15 and the second seat portion 16 are arranged on the same plane.
  • a first valve hole 21 and a second valve hole 22 are bored in the housing 12.
  • the first valve hole 21 is bored perpendicularly to the seat surface of the first seat portion 15 from the first seat portion 15 to an intermediate predetermined position in the housing 12.
  • the second valve hole 22 is bored perpendicularly to the seat surface of the second seat portion 16 from the second seat portion 16 to an intermediate predetermined position in the housing 12.
  • the first valve hole 21 and the second valve hole 22 are parallel to each other.
  • the first valve hole 21 and the second valve hole 22 have the same shape and are aligned in the axial direction.
  • the first valve hole 21 has a first bottom hole portion 31, a first mounting hole portion 32, a first main hole portion 33, and a first screw hole portion 34 in this order from the innermost side.
  • the first bottom hole portion 31, the first mounting hole portion 32, the first main hole portion 33, and the first screw hole portion 34 are arranged coaxially with their central axes aligned.
  • the inner diameter of the first mounting hole portion 32 is larger than the inner diameter of the first bottom hole portion 31.
  • the inner diameter of the first main hole portion 33 is larger than the inner diameter of the first mounting hole portion 32.
  • the minimum inner diameter of the first screw hole portion 34 is larger than the inner diameter of the first main hole portion 33.
  • the first screw hole portion 34 is opened to the outside of the housing 12 at the position of the first seat portion 15.
  • the second valve hole 22 has a second bottom hole portion 41, a second mounting hole portion 42, a second main hole portion 43, and a second screw hole portion 44 in this order from the innermost side.
  • the second bottom hole portion 41, the second mounting hole portion 42, the second main hole portion 43, and the second screw hole portion 44 are arranged coaxially with their central axes aligned.
  • the inner diameter of the second mounting hole portion 42 is larger than the inner diameter of the second bottom hole portion 41.
  • the inner diameter of the second main hole portion 43 is larger than the inner diameter of the second mounting hole portion 42.
  • the minimum inner diameter of the second screw hole portion 44 is larger than the inner diameter of the first main hole portion 33.
  • the second screw hole portion 44 is opened to the outside of the housing 12 at the position of the second seat portion 16.
  • the housing 12 is formed with a first internal passage 51, a second internal passage 52, a first inflow passage 53, and a second inflow passage 54.
  • One end of the first internal passage 51 opens into the first main hole 33, and the other end opens into the second bottom hole 41.
  • One end of the second internal passage 52 opens into the second main hole 43, and the other end opens into the first bottom hole 31.
  • the first inflow passage 53 opens the first bottom hole portion 31 to the outside of the housing 12.
  • the second inflow passage 54 opens the second bottom hole 41 to the outside of the housing 12.
  • the first internal passage 51 includes a first outlet 61 (outlet) that opens in the first main hole 33, a first communication port 62 that opens in the second bottom hole 41, and a first outlet 61 and a first. It has a first intermediate passage portion 63 connecting the one communication port 62.
  • the first outlet 61 is opened at an intermediate predetermined position in the axial direction of the first main hole portion 33, and extends along the radial direction of the first main hole portion 33.
  • the first communication port 62 extends along the radial direction of the second bottom hole portion 41.
  • the first intermediate passage portion 63 extends in the axial direction of the first valve hole 21.
  • the second internal passage 52 includes a second outlet 71 (outlet) that opens in the second main hole 43, a second communication port 72 that opens in the first bottom hole 31, a second outlet 71, and a second outlet. It has a second intermediate passage portion 73 connecting the two communication ports 72.
  • the second outlet 71 is opened at an intermediate predetermined position in the axial direction of the second main hole portion 43, and extends along the radial direction of the second main hole portion 43.
  • the second communication port 72 extends along the radial direction of the first bottom hole portion 31.
  • the second intermediate passage portion 73 extends in the axial direction of the second valve hole 22.
  • the differential pressure valve 11 has a first valve component 81 incorporated in the first valve hole 21 and a second valve component 82 incorporated in the second valve hole 22.
  • the first valve hole 21 and the first valve component 81 constitute the first valve mechanism 83.
  • the second valve hole 22 and the second valve component 82 constitute the second valve mechanism 84.
  • the first valve component 81 and the second valve component 82 have the same configuration. Since the first valve hole 21 and the second valve hole 22 have the same shape, the first valve mechanism 83 and the second valve mechanism 84 have the same configuration.
  • first valve component 81 of the first valve component 81 and the second valve component 82 having the same configuration will be described as an example.
  • the first valve component 81 has a seat member 91, a lid member 92, a washer 93, and an urging member 95.
  • the seat member 91 is fitted into the first mounting hole portion 32 of the first valve hole 21.
  • the lid member 92 is screwed into the first screw hole portion 34 of the first valve hole 21.
  • the washer 93 is interposed between the lid member 92 and the first seat portion 15.
  • the valve body 94 is movably provided in the first main hole portion 33.
  • the urging member 95 urges the valve body 94 in the direction of the seat member 91.
  • the seat member 91 has a passage hole 101 extending in the axial direction penetrating the center in the radial direction.
  • the seat member 91 has an annular base portion 103 and an annular seat portion 104 having an outer diameter smaller than the outer diameter of the base portion 103 and projecting outward from one end in the axial direction of the base portion 103.
  • the base portion 103 and the seat portion 104 are arranged coaxially with their central axes aligned.
  • the base portion 103 is fitted into the first mounting hole portion 32 and fixed to the housing 12.
  • the orientation of the seat member 91 at this time is the orientation in which the seat portion 104 is arranged on the side of the first main hole portion 33 of the first valve hole 21.
  • the seat portion 104 surrounds the passage hole 101 over the entire circumference. In this way, the seat portion 104 is formed on the seat member 91 that is separate from the housing 12.
  • the passage hole 101 of the seat member 91 fixed to the first mounting hole 32 of the housing 12 communicates with the first bottom hole 31 and constitutes the inflow port 106 together with the first bottom hole 31. ..
  • the seat portion 104 is formed so as to surround the inflow port 106.
  • the inflow port 106 including the passage hole 101 of the seat member 91 of the first valve component 81 always communicates with the first inflow passage 53.
  • the seat member 91 of the second valve constituent portion 82 is also fixed to the second mounting hole portion 42.
  • the inflow port 106 composed of the passage hole 101 of the sheet member 91 and the second bottom hole portion 41 always communicates with the second inflow passage 54.
  • the valve body 94 has a circular shape. Specifically, the valve body 94 is a stepped columnar shape.
  • the valve body 94 has a solid columnar shaft portion 111 and a disc-shaped flange portion 112 (first flange portion) extending radially outward from one end side in the axial direction of the shaft portion 111.
  • the shaft portion 111 and the flange portion 112 are arranged coaxially with their central axes aligned.
  • a plurality of recesses 116 (first recesses) having the same shape that are recessed inward in the radial direction from the cylindrical outermost peripheral surface 114 are formed on the outer peripheral portion of the flange portion 112.
  • the recesses 116 are formed at odd-numbered locations at equal intervals in the circumferential direction of the collar portion 112.
  • the recesses 116 are formed at three positions at 120 ° intervals in the circumferential direction of the collar portion 112.
  • a protruding portion 118 (first protruding portion) is formed on the outer peripheral portion of the flange portion 112 between the recesses 116 and the recesses 116 that are adjacent to each other in the circumferential direction.
  • the protruding portion 118 (first protruding portion) protrudes outward in the radial direction of the collar portion 112 from the most recessed position of the recess 116.
  • the protruding portions 118 of the flange portion 112 all have the same shape.
  • the length of the protrusion 118 in the circumferential direction of the collar 112 is longer than the length of the recess 116 in the same direction.
  • the protruding portions 118 are formed at odd-numbered locations at equal intervals in the circumferential direction of the flange portion 112. Specifically, the protruding portions 118 are formed at three locations at 120 ° intervals in the circumferential direction of the flange portion 112.
  • the collar portion 112 has an annular collar base end portion 121 between the plurality of protruding portions 118 and the shaft portion 111. A plurality of projecting portions 118 project radially outward from the brim base end portion 121. As shown in FIG. 1, the outer diameter of the collar base end portion 121 is larger than the outer diameter of the seat portion 104 of the seat member 91. In other words, the minimum outer diameter of the flange portion 112 is larger than the outer diameter of the seat portion 104. Therefore, the maximum outer diameter of the flange portion 112, that is, the maximum outer diameter of the valve body 94 is also larger than the outer diameter of the seat portion 104. The maximum outer diameter of the flange portion 112 is slightly smaller than the inner diameter of the first main hole portion 33.
  • the valve body 94 is inserted into the first main hole portion 33 with the flange portion 112 facing the seat portion 104 side. In this state, the valve body 94 can be seated on the seat portion 104.
  • the valve body 94 has a disc-shaped seating body 123 at the center in the radial direction of the end portion of the flange portion 112 on the side opposite to the protruding side of the shaft portion 111.
  • the portion of the valve body 94 that is seated on the seat portion 104 is composed of the seated body 123.
  • the seating body 123 constitutes the collar base end portion 121.
  • the portion of the valve body 94 other than the seating body 123 is the valve body 124.
  • the valve body 124 is made of a material different from that of the seating body 123.
  • the seating body 123 is made of synthetic resin, and the valve body 124 is made of metal.
  • the valve body 124 includes the entire side of the shaft portion 111 that protrudes from the flange portion 112, a portion that overlaps the flange portion 112 of the shaft portion 111 in the axial direction, and a portion of the flange portion 112 that protrudes from the shaft portion 111. , Consists of a radial outer portion of the collar portion 112.
  • the valve body 124 is integrally molded.
  • a concave portion 116 and a protruding portion 118 are formed at odd numbers on the outer peripheral portion of the flange portion 112, respectively.
  • the recesses 116 are provided at positions 180 degrees opposite to all the protruding portions 118 in the circumferential direction of the respective flange portions 112.
  • the flange portion 112 is recessed inward in the radial direction at positions of the plurality of projecting portions 118 projecting outward in the radial direction and each of the plurality of projecting portions 118 in the circumferential direction of the flange portion 112. It is provided with a recess 116.
  • the lid member 92 has a head 131, a disk portion 132, a screw shaft portion 133, and a protruding shaft portion 134 in this order from one side in the axial direction.
  • the head 131 is a portion that is engaged with a screwing tool such as a spanner.
  • the outer shape of the head 131 has a hexagonal diameter.
  • the disk portion 132 has an outer diameter larger than the maximum outer diameter of the head 131.
  • the maximum outer diameter of the screw shaft portion 133 is smaller than the outer diameter of the disc portion 132.
  • the protruding shaft portion 134 has a columnar shape.
  • the protruding shaft portion 134 has a diameter smaller than the minimum outer diameter of the screw shaft portion 133.
  • the head 131, the disk portion 132, the screw shaft portion 133, and the protruding shaft portion 134 are arranged coaxially with their central axes aligned.
  • the lid member 92 of the first valve constituent portion 81 is inserted into the first valve hole 21 with the protruding shaft portion 134 at the head. At that time, the screw shaft portion 133 is screwed into the first screw hole portion 34. At this time, an annular washer 93 is interposed between the disk portion 132 and the first seat portion 15. The lid member 92 is axially aligned with the shaft portion 111 of the valve body 94 of the valve body 94 of the first valve constituent portion 81 in a state where the protruding shaft portion 134 is screwed into the first valve hole 21. Facing.
  • the valve body 94 is provided with a predetermined gap in the axial direction between the shaft portion 111 and the protruding shaft portion 134 of the lid member 92 in a state of being in contact with the seat portion 104.
  • the valve body 94 moves in the axial direction within the range of this gap.
  • the outermost outer peripheral surface 114 of the flange portion 112 is guided to the inner peripheral surface 138 which is the cylindrical surface of the first main hole portion 33. Even if the valve body 94 moves within the above range, the flange portion 112 is always between the inflow port 106 and the first outflow port 61.
  • the urging member 95 is a coil spring.
  • the protruding shaft portion 134 of the lid member 92 is inserted inside one end in the axial direction, and the shaft portion 111 of the valve body 94 is inserted inside the other end in the axial direction.
  • one end of the urging member 95 in the axial direction comes into contact with the end surface of the screw shaft portion 133 of the lid member 92 on the protruding shaft portion 134 side, and the other end in the axial direction is the shaft portion 111 of the flange portion 112 of the valve body 94. Abuts on the protruding side end face.
  • the urging member 95 urges the valve body 94 toward the seat portion 104 in the valve closing direction.
  • valve body 94 When the differential pressure in the valve opening direction received by the valve body 94 is smaller than a predetermined value, the valve body 94 abuts on the seat portion 104 by the urging force of the urging member 95 to close the inflow port 106. When the differential pressure received by the valve body 94 in the valve opening direction becomes larger than a predetermined value, the valve body 94 separates from the seat portion 104 and opens the inflow port 106 against the urging force of the urging member 95. At that time, in the valve body 94, the outermost outer peripheral surface 114 of the flange portion 112 is guided by the inner peripheral surface 138 of the first main hole portion 33 and moves in the axial direction.
  • the valve chamber 141 is formed by being surrounded by the first main hole 33 of the housing 12, the lid member 92, and the seat member 91.
  • the valve body 94 is provided in the valve chamber 141 so as to be movable in the axial direction.
  • the seat member 91 constitutes the bottom 142 of the valve chamber 141. Therefore, a seat portion 104 on which the valve body 94 is seated is provided on the bottom portion 142 of the valve chamber 141.
  • the inflow port 106 including the passage hole 101 of the seat member 91 is formed in the bottom 142 of the valve chamber 141.
  • the inner peripheral surface 138 of the first main hole portion 33 is also the inner peripheral surface 138 of the valve chamber 141.
  • the first outlet 61 that opens into the first main hole 33 is formed on the inner peripheral surface 138 of the valve chamber 141 of the first valve mechanism 83.
  • the second outlet 71 that opens into the second main hole 43 is formed on the inner peripheral surface 138 of the valve chamber 141 of the second valve mechanism 84.
  • the valve body 94 is provided with a collar 112 on the bottom 142 side of the valve chamber 141.
  • the collar portion 112 extends radially outward from the seat portion 104.
  • the plurality of projecting portions 118 of the flange portion 112 project radially outward from the flange base end portion 121 toward the inner peripheral surface 138 of the valve chamber 141.
  • the plurality of recesses 116 of the collar 112 are recessed inward in the radial direction of the collar 112 at positions opposite to the circumferential direction of the protrusion 118.
  • the collar portion 112 includes a plurality of protruding portions 118 and a recessed portion 116.
  • the plurality of projecting portions 118 project radially outward from the flange base end portion 121 toward the inner peripheral surface 138 of the valve chamber 141.
  • the recess 116 is recessed inward in the radial direction at a position opposite to the circumferential direction of the protrusion 118.
  • the differential pressure valve 11 is arranged in the communication passages 158 and 159 connecting the two air springs 155 and 156 provided between the vehicle body 152 and the bogie 153 of the vehicle 151.
  • the differential pressure valve 11 opens and closes the communication passages 158 and 159 according to the pressure difference between the two air springs 155 and 156.
  • One of the air springs 155 and the first inflow passage 53 communicate with each other via the passage portion 161.
  • the other air spring 156 and the second inflow passage 54 communicate with each other via the passage portion 162.
  • a passage portion 161 extending from one of the air springs 155, a first inflow passage 53, an inflow port 106 of the first valve mechanism 83, a valve chamber 141 of the first valve mechanism 83, and a first internal passage 51.
  • the inflow port 106 of the second valve mechanism 84, the second inflow passage 54, and the passage portion 162 form a continuous passage 158 connecting the two air springs 155 and 156.
  • a passage portion 162 extending from the other air spring 156, a second inflow passage 54, an inflow port 106 of the second valve mechanism 84, a valve chamber 141 of the second valve mechanism 84, and a second internal passage 52.
  • the inflow port 106 of the first valve mechanism 83, the first inflow passage 53, and the passage portion 161 form a continuous passage 159 connecting the two air springs 155 and 156.
  • the first valve mechanism 83 is arranged in the communication passage 158, and opens and closes the communication passage 158 according to the pressure difference between the two air springs 155 and 156. That is, when the pressure of the air spring 155 becomes higher than the pressure of the air spring 156, the valve body 94 separates from the seat portion 104 against the urging force of the urging member 95 and opens the inflow port 106. Then, the communication passage 158 is passed, and the air of the air spring 155 is passed through the communication passage 158, that is, the passage portion 161, the first inflow passage 53, the inflow port 106 of the first valve mechanism 83, and the valve chamber 141 of the first valve mechanism 83.
  • the air spring 156 flows through the first internal passage 51 including the first outlet 61, the inflow port 106 of the second valve mechanism 84, the second inflow passage 54, and the passage portion 162. As a result, the pressure of the air spring 155 is lowered so as to approach the pressure of the air spring 156.
  • the air of one of the air springs 155 flows into the inflow port 106 formed at the bottom 142 of the valve chamber 141. Further, the first outlet 61 of the first internal passage 51 is formed on the inner peripheral surface 138 of the valve chamber 141 of the first valve mechanism 83, and air flows out to the other air spring 156.
  • the first outlet 61 intersects the direction connecting the inlet 106 and the valve chamber 141, that is, the axial direction of the first valve hole 21. Specifically, the first outlet 61 is orthogonal to the axial direction of the first valve hole 21. Therefore, when air flows from the inflow port 106 to the first outlet 61 through the valve chamber 141, the air flowing into the valve chamber 141 from the inflow port 106 is mainly the recess 116 of the flange portion 112 of the valve body 94. After passing between the valve chamber 141 and the inner peripheral surface 138 of the valve chamber 141 in the axial direction of the valve body 94, the air flows out from the first outlet 61 by changing the direction in the radial direction of the valve body 94.
  • the second valve mechanism 84 is arranged in the communication passage 159 and opens and closes the communication passage 159 according to the pressure difference between the two air springs 155 and 156. That is, when the pressure of the air spring 156 becomes higher than the pressure of the air spring 155, the valve body 94 separates from the seat portion 104 against the urging force of the urging member 95 and opens the inflow port 106. Then, the communication passage 159 is passed through, and the air of the air spring 156 is passed through the communication passage 159, that is, the passage portion 162, the second inflow passage 54, the inflow port 106 of the second valve mechanism 84, and the valve chamber 141 of the second valve mechanism 84.
  • the second internal passage 52 including the second outlet 71, the inflow port 106 of the first valve mechanism 83, the first inflow passage 53, and the passage portion 161 flow to the air spring 155.
  • the pressure of the air spring 156 is lowered so as to approach the pressure of the air spring 155.
  • the air of the other air spring 156 flows into the inflow port 106 formed at the bottom 142 of the valve chamber 141. Further, the second outlet 71 of the second internal passage 52 is formed on the inner peripheral surface 138 of the valve chamber 141 of the second valve mechanism 84, and air flows out to one of the air springs 155.
  • the second outlet 71 intersects the direction connecting the inlet 106 and the valve chamber 141, that is, the axial direction of the second valve hole 22. Specifically, the second outlet 71 is orthogonal to the axial direction of the second valve hole 22. Therefore, when air flows from the inflow port 106 to the second outflow port 71 through the valve chamber 141, the air flowing into the valve chamber 141 from the inflow port 106 is mainly the recess 116 of the flange portion 112 of the valve body 94. After passing between the valve chamber 141 and the inner peripheral surface 138 of the valve chamber 141 in the axial direction of the valve body 94, the air flows out from the second outlet 71 by changing the direction in the radial direction of the valve body 94.
  • a differential pressure valve that opens and closes a continuous passage according to a pressure difference between the two air springs is provided in a continuous passage connecting two air springs provided between a vehicle body and a bogie. It is disclosed to provide. In such a differential pressure valve, it is required to suppress variations in valve opening pressure.
  • the inflow port 106 into which the air of one air spring 155 flows in is formed at the bottom 142 of the valve chamber 141, and the air flows out to the other air spring 156.
  • the first outlet 61 is formed on the inner peripheral surface 138 of the valve chamber 141. With such a structure, the first outlet 61 intersects the direction connecting the inlet 106 and the valve chamber 141. Therefore, when air flows from the inflow port 106 to the first outlet 61 through the valve chamber 141, the air flowing into the valve chamber 141 from the inflow port 106 is mainly the recess 116 of the flange portion 112 of the valve body 94.
  • the air flows out from the first outlet 61 by changing the direction in the radial direction of the valve body 94.
  • the recess 116 is located on the side opposite to the first outlet 61 in the circumferential direction of the valve body 94, the air flow passing through the recess 116 and facing the first outlet 61 causes the valve body 94 to become the first.
  • a large radial force acts toward the 1st outlet 61.
  • valve body 94 is tilted in the valve chamber 141 so that the end portion of the flange portion 112 opposite to the seat portion 104 is closer to the first outlet 61 than the end portion on the seat portion 104 side. there is a possibility.
  • an arcuate protruding portion 118 is provided at a position opposite to the circumferential direction of the recess 116 of the flange portion 112 of the valve body 94. Therefore, even if the valve body 94 is tilted as described above, the protruding portion 118 is in line contact with the inner peripheral surface 138 of the valve chamber 141, and the contact surface pressure is lowered. Therefore, the axial movement of the valve body 94 becomes smooth. Therefore, it is possible to suppress variations in valve opening pressure.
  • the valve body 94 is formed at the corners of both ends of the recess 116 of the flange 112 in the circumferential direction when tilted as described above. It contacts the inner peripheral surface 138 of the valve chamber 141 by point contact. Then, the contact surface pressure may increase, causing galling or the like, and the valve body 94 may not be able to move smoothly in the axial direction.
  • the first valve mechanism 83 can reduce such a possibility.
  • valve body 94 is formed with protrusions 118 at intervals of 120 ° in the circumferential direction. Therefore, the area of the outermost peripheral surface 114 of the valve body 94 can be increased. For example, it is possible to double the interval as compared with the case where the interval is 60 °. Therefore, since the contact area between the inner peripheral surface 138 of the valve chamber 141 and the valve body 94 can be increased, the axial movement of the valve body 94 becomes smoother. Therefore, it is possible to further suppress variations in valve opening pressure. Further, since the recesses 116 are formed in the valve body 94 at intervals of 120 ° in the circumferential direction, the number of recesses 116 can be reduced, and thus the man-hours for processing the valve body 94 can be reduced.
  • the first valve mechanism 83 has the following structure. That is, the valve body 94 has a shaft portion 111 that protrudes from the flange portion 112 on the side opposite to the seat portion 104. The shaft portion 111 is inserted into one end side of the urging member 95. As a result, one end of the biasing member 95 is brought into contact with the flange 112. Further, the lid member 92 has a protruding shaft portion 134 on the urging member 95 side. The protruding shaft portion 134 is inserted into the other end side of the urging member 95. As a result, the other end of the urging member 95 is brought into contact with the screw shaft portion 133. As a result, the length of the urging member 95 can be shortened while stabilizing the posture. Therefore, the possibility of buckling of the urging member 95 can be reduced, and the expansion and contraction of the urging member 95 can be stabilized. In addition, by shortening the urging member 95, it is possible to suppress the tilting of the valve body 94.
  • valve body 94 of the first valve mechanism 83 has only one flange portion 112
  • air can easily pass through the valve body 94, and the posture is stable without being affected by the air. Therefore, it is possible to further suppress variations in valve opening pressure.
  • the differential pressure valve 11A of the second embodiment is provided with the first valve mechanism 83A instead of the first valve mechanism 83 of the first embodiment.
  • the differential pressure valve 11A is provided with a second valve mechanism 84A instead of the second valve mechanism 84 of the first embodiment.
  • the first valve component 81A is partially different from the first valve component 81 of the first embodiment.
  • the second valve component 84A the second valve component 82A is partially different from the second valve component 82 of the first embodiment.
  • the first valve component 81A and the second valve component 82A have the same configuration. Therefore, the first valve component 81A will be described below as an example.
  • the first valve component 81A includes a seat member 91, a lid member 92A, a washer 93, a valve body 94A, an urging member 95A, and a plurality of discs 200.
  • the seat member 91 is the same as that of the first embodiment.
  • the lid member 92A is screwed into the first screw hole portion 34 of the first valve hole 21.
  • the washer 93 is the same as that of the first embodiment, and is interposed between the lid member 92A and the first seat portion 15.
  • the valve body 94A is movably provided in the first main hole portion 33.
  • the urging member 95A urges the valve body 94A in the direction of the seat member 91.
  • the valve body 94A has a circular shape. Specifically, the valve body 94A has a stepped bottomed cylinder.
  • the valve body 94A has a shaft portion 111A, a flange portion 112A (first flange portion), and a collar portion 212 (second flange portion).
  • the flange portion 112A (first flange portion) extends radially outward from one end side in the axial direction of the shaft portion 111A.
  • the flange portion 212 (second flange portion) extends radially outward from the other end side in the axial direction of the shaft portion 111A.
  • the shaft portion 111A and the flange portions 112A and 212 are arranged coaxially with their central axes aligned.
  • the shaft portion 111A has a bottomed cylindrical shape.
  • the shaft portion 111A has a cylindrical body portion 201 and a bottom portion 202 that closes one end of the body portion 201.
  • the collar portion 112A is provided at the end of the shaft portion 111A on the bottom 202 side.
  • the flange portion 212 is provided at an open end portion of the shaft portion 111A opposite to the bottom portion 202.
  • a through hole 204 is formed in the body portion 201 at a position between the collar portion 112A and the collar portion 212.
  • the through holes 204 are formed at a plurality of through holes 204 that penetrate the body portion 201 in the radial direction of the body portion 201 at equal intervals in the circumferential direction of the body portion 201, specifically, four locations.
  • the collar portion 112A is formed with a plurality of recesses 116 (first recesses) having the same shape.
  • the recess 116 (first recess) is recessed inward in the radial direction from the outermost peripheral surface 114 having a cylindrical surface shape. Therefore, the flange portion 112A is formed with a plurality of protrusions 118 (first protrusions) having the same shape that protrude outward in the radial direction from the shaft portion 111A.
  • a plurality of recesses 216 having the same shape are formed in the collar portion 212, similarly to the collar portion 112A.
  • the recess 216 (second recess) is recessed inward in the radial direction from the outermost peripheral surface 214 having a cylindrical surface shape.
  • the outer diameter of the outermost outer peripheral surface 214 is the same as the outer diameter of the outermost outer peripheral surface 114.
  • the recess 216 has the same shape as the recess 116.
  • the recesses 216 are formed at odd-numbered locations at equal intervals in the circumferential direction of the collar portion 212.
  • the recesses 216 are formed at three positions at 120 ° intervals in the circumferential direction of the collar portion 212.
  • the flange portion 212 aligns the position of the recess 216 in the circumferential direction with the recess 116 of the collar portion 112A.
  • a protruding portion 218 (second protruding portion) is formed between the recesses 216 and the recesses 216 that are adjacent to each other in the circumferential direction.
  • the protruding portion 218 (second protruding portion) protrudes outward in the radial direction of the flange portion 212 from the most recessed position of the recess 216.
  • the protruding portions 218 of the flange portion 212 all have the same shape.
  • the protrusion 218 has the same shape as the protrusion 118.
  • the flange portion 212 aligns the position of the protruding portion 218 with the protruding portion 118 in the circumferential direction thereof.
  • the protruding portion 118 and the protruding portion 218 are arranged so as to coincide with the circumferential direction of the valve body 94A.
  • the length of the protrusion 218 in the circumferential direction of the collar portion 212 is longer than the length of the recess 216 in the same direction.
  • the protruding portions 218 are formed at odd-numbered locations at equal intervals in the circumferential direction of the flange portion 212.
  • the protruding portions 218 are formed at three positions at 120 ° intervals in the circumferential direction of the flange portion 212.
  • the flange portion 112A and the flange portion 212 have the same shape, and the positions (phases) of the valve body 94A in the circumferential direction are matched.
  • the through hole 204 of the shaft portion 111A is formed on the collar portion 112A side of the flange portion 212.
  • the outer diameter of the bottomed cylindrical shaft portion 111A is larger than the outer diameter of the seat portion 104 of the seat member 91.
  • the minimum outer diameter of the flange portion 112A is larger than the outer diameter of the seat portion 104. Therefore, the maximum outer diameter of the flange portions 112A and 212, that is, the maximum outer diameter of the valve body 94A is also larger than the outer diameter of the seat portion 104.
  • the maximum outer diameters of the flange portions 112A and 212 are slightly smaller than the inner diameter of the first main hole portion 33.
  • the valve body 94A is inserted into the first main hole portion 33 with the flange portion 112A on the seat portion 104 side and the collar portion 212 on the side opposite to the seat portion 104. In this state, the valve body 94A can be seated on the seat portion 104 at the bottom portion 202 of the shaft portion 111A.
  • the valve body 94A has a seating body 123 similar to that of the first embodiment on the side of the bottom portion 202 opposite to the body portion 201.
  • the portion of the valve body 94A that is seated on the seat portion 104 is also composed of the seated body 123.
  • the portion of the valve body 94A other than the seating body 123 is a metal valve body 124A whose material is different from that of the seating body 123, for example.
  • the valve body 124A comprises the entire shaft portion 111A except the seating body 123, the collar portion 112A, and the collar portion 212, and is integrally molded.
  • the flange portion 212 is formed with an odd number of recesses 216 and protrusions 218, respectively. For this reason, recesses 216 are provided at positions 180 degrees opposite to all the protruding portions 218 in the circumferential direction of the respective flange portions 212.
  • the flange portion 212 also has a plurality of projecting portions 218 projecting radially outward from the shaft portion 111A and the positions of each of the plurality of projecting portions 218 on opposite sides in the circumferential direction of the flange portion 212 in the radial direction. It is provided with a recess 216 that is recessed inward.
  • the lid member 92A has the same head 131 and disc portion 132 as in the first embodiment, and the screw shaft portion 133A is on the side of the disc portion 132 opposite to the head 131. have.
  • the maximum outer diameter of the screw shaft portion 133A is smaller than the outer diameter of the disc portion 132.
  • the head 131, the disk portion 132, and the screw shaft portion 133A are arranged coaxially with their central axes aligned.
  • a housing hole 206 is formed in the center of the screw shaft portion 133A in the radial direction.
  • the accommodating hole 206 is bored in the screw shaft portion 133A from the side opposite to the head 131 in the axial direction.
  • the lid member 92A is inserted into the first valve hole 21 with the screw shaft portion 133A at the head. At that time, the screw shaft portion 133A is screwed into the first screw hole portion 34. At this time, the washer 93 is interposed between the disk portion 132 and the first seat portion 15.
  • the lid member 92A faces the flange portion 212 in the axial direction in a state where the lid member 92A is screwed into the first valve hole 21 and the accommodating hole 206 substantially coincides with the valve body 94A and the central axis.
  • the valve body 94A is provided with a predetermined gap in the axial direction from the lid member 92A in a state of being in contact with the seat portion 104.
  • the valve body 94A moves in the axial direction within this gap.
  • the outermost outer peripheral surfaces 114 and 214 of the flange portions 112A and 212 are guided to the inner peripheral surface 138 of the first main hole portion 33. Even if the valve body 94A moves within the above range, the flange portion 112A is always between the inflow port 106 and the first outflow port 61.
  • the urging member 95A is a coil spring. One end of the urging member 95A in the axial direction is inserted into the accommodating hole 206 of the lid member 92A, and the other end in the axial direction is inserted into the body 201 of the valve body 94A. Then, one end of the urging member 95A abuts against the bottom of the accommodating hole 206 of the lid member 92A via a plurality of discs 200, and the other end of the axial direction abuts on the bottom 202 of the valve body 94A. Therefore, the urging member 95A is longer in the axial direction than the urging member 95 of the first embodiment. The urging member 95A urges the valve body 94A in the valve closing direction toward the seat portion 104.
  • valve body 94A when the differential pressure in the valve opening direction received by the valve body 94A is smaller than the predetermined value, the valve body 94A abuts on the seat portion 104 by the urging force of the urging member 95A and closes the inflow port 106. Further, when the differential pressure received by the valve body 94A in the valve opening direction becomes larger than a predetermined value, the valve body 94A separates from the seat portion 104 and opens the inflow port 106 against the urging force of the urging member 95A. At that time, in the valve body 94A, the outermost outer peripheral surfaces 114 and 214 of the flange portions 112A and 212 are guided by the inner peripheral surface 138 of the first main hole portion 33 and move in the axial direction.
  • the valve chamber 141A is formed by being surrounded by the first main hole 33 of the housing 12, the lid member 92A, and the seat member 91.
  • the valve body 94A is provided in the valve chamber 141A so as to be movable in the axial direction.
  • the seat member 91 constitutes the bottom 142 of the valve chamber 141A.
  • a seat portion 104 on which the valve body 94A is seated is provided on the bottom portion 142 of the first valve chamber 141A.
  • the inflow port 106 including the passage hole 101 of the seat member 91 is formed in the bottom portion 142 of the valve chamber 141A.
  • the inner peripheral surface 138 of the first main hole portion 33 is also the inner peripheral surface 138 of the valve chamber 141A.
  • the first outlet 61 that opens into the first main hole 33 is formed on the inner peripheral surface 138 of the valve chamber 141A of the first valve mechanism 83A.
  • the second outlet 71 that opens into the second main hole 43 is formed on the inner peripheral surface 138 of the valve chamber 141A of the second valve mechanism 84A.
  • the valve body 94A is provided with a collar portion 112A on the bottom 142 side of the valve chamber 141A.
  • the collar portion 112A extends outward in the radial direction from the seat portion 104.
  • the plurality of projecting portions 118 of the flange portion 112A project radially outward from the shaft portion 111A toward the inner peripheral surface 138 of the valve chamber 141A.
  • the plurality of recesses 116 of the collar 112A are recessed inward in the radial direction of the collar 112A at positions opposite to the circumferential direction of the protrusion 118.
  • the valve body 94A is provided with a collar portion 212 on the side opposite to the bottom portion 142.
  • the flange portion 212 extends radially outward from the shaft portion 111A toward the inner peripheral surface 138 of the valve chamber 141A.
  • the plurality of projecting portions 218 of the flange portion 212 project radially outward from the shaft portion 111A toward the inner peripheral surface 138 of the valve chamber 141A.
  • the plurality of recesses 216 of the collar portion 212 are recessed inward in the radial direction of the collar portion 212 at positions opposite to the circumferential direction of the protrusion 218.
  • the first outlet 61 intersects, specifically, is orthogonal to the direction connecting the inflow port 106 and the valve chamber 141A. Therefore, when air flows from the inflow port 106 to the first outlet 61 via the valve chamber 141A, the air flowing into the valve chamber 141A from the inflow port 106 is mainly the recess 116 of the flange portion 112A of the valve body 94A. After passing between the valve chamber 141A and the inner peripheral surface 138 of the valve chamber 141A in the axial direction of the valve body 94A, the air flows out from the first outlet 61 by changing the direction in the radial direction of the valve body 94A.
  • the second outlet 71 intersects, specifically, is orthogonal to the direction connecting the inflow port 106 and the valve chamber 141A. Therefore, when air flows from the inflow port 106 to the second outflow port 71 through the valve chamber 141A, the air flowing into the valve chamber 141A from the inflow port 106 is mainly the recess 116 of the flange portion 112A of the valve body 94A. After passing between the valve chamber 141A and the inner peripheral surface 138 of the valve chamber 141A in the axial direction of the valve body 94A, the air flows out from the second outlet 71 by changing the direction in the radial direction of the valve body 94A.
  • valve chamber 141A of the first valve mechanism 83A constitutes a communication passage 158 communicating the air springs 155 and 156, similarly to the valve chamber 141 of the first embodiment.
  • the valve chamber 141A of the second valve mechanism 84A constitutes a communication passage 159 that communicates the air springs 155 and 156.
  • the inflow port 106 into which the air of one air spring 155 flows in is formed at the bottom 142 of the valve chamber 141A, and the air flows out to the other air spring 156.
  • the first outlet 61 is formed on the inner peripheral surface 138 of the valve chamber 141A. With such a structure, the first outlet 61 intersects the direction connecting the inlet 106 and the valve chamber 141A. Therefore, in the first valve mechanism 83A, when air flows from the inflow port 106 to the first outflow port 61 through the valve chamber 141A, the air flowing into the valve chamber 141A from the inflow port 106 is mainly the valve body 94A.
  • the air flows out from the first outlet 61 by turning in the radial direction of the valve body 94A. ..
  • the air flow passing through the recess 116 toward the first outlet 61 causes the valve body 94A to reach the first position.
  • a large radial force acts toward the 1st outlet 61.
  • valve body 94A may tilt in the valve chamber 141A so that the flange portion 212 on the side opposite to the seat portion 104 is closer to the first outlet 61 than the collar portion 112B on the seat portion 104 side. There is.
  • the first valve mechanism 83A is provided with arc-shaped protrusions 118 and 218 at positions opposite to the circumferential directions of the recesses 116 and 216 of the flange 112A of the valve body 94A. Therefore, even if the valve body 94A is tilted as described above, the protruding portion 218 is in line contact with the inner peripheral surface 138 of the valve chamber 141A, and the contact surface pressure is lowered. Therefore, the axial movement of the valve body 94A becomes smooth. Therefore, it is possible to suppress variations in valve opening pressure.
  • the protruding portion 218 is also formed on the valve body 94A at intervals of 120 ° in the circumferential direction. Therefore, the area of the outermost peripheral surface 214 of the valve body 94A can be increased. Therefore, the contact area between the inner peripheral surface 138 of the valve chamber 141A and the valve body 94A can be increased, so that the axial movement of the valve body 94A becomes smoother. Therefore, it is possible to further suppress variations in valve opening pressure. Further, since the recesses 216 are formed in the valve body 94A at intervals of 120 ° in the circumferential direction, the number of recesses 216 can be reduced. Therefore, the man-hours for processing the valve body 94A can be reduced.
  • the protruding portion 118 and the protruding portion 218 are arranged so as to coincide with the circumferential direction of the valve body 94A, the man-hours for processing the valve body 94A can be reduced, and the air around the valve body 94A can be reduced. The flow can be smoothed.
  • the differential pressure valve 11B of the third embodiment is provided with the first valve mechanism 83B instead of the first valve mechanism 83A of the second embodiment.
  • the differential pressure valve 11B is provided with a second valve mechanism 84B instead of the second valve mechanism 84A of the second embodiment.
  • the first valve component 81B is partially different from the first valve component 81A of the second embodiment.
  • the second valve component 82B is partially different from the second valve component 82A of the second embodiment.
  • the first valve component 81B and the second valve component 82B have the same configuration. Therefore, the first valve component 81B among these will be described as an example.
  • the first valve component 81B has a valve body 94B.
  • the valve body 94B is partially different from the valve body 94A of the second embodiment.
  • the valve body 94B has a shaft portion 111A, a collar portion 112B (first collar portion), and a collar portion 212B (second collar portion).
  • the shaft portion 111A is the same as that of the second embodiment.
  • the flange portion 112B (first flange portion) extends radially outward from one end side in the axial direction of the shaft portion 111A.
  • the flange portion 212B (second flange portion) extends radially outward from the other end side in the axial direction of the shaft portion 111A.
  • the shaft portion 111A and the flange portions 112B and 212B are arranged coaxially with their central axes aligned. As shown in FIG. 8, the collar portion 112B is provided on the bottom portion 202 side of the shaft portion 111A. The collar portion 212B is provided on the side of the shaft portion 111A opposite to the bottom portion 202.
  • a plurality of recesses 116B having the same shape are formed in the collar portion 112B.
  • the recess 116B (first recess) is recessed inward in the radial direction from the outermost peripheral surface 114B having a cylindrical surface.
  • the recesses 116B are formed at even-numbered positions at equal intervals in the circumferential direction of the flange portion 112B. Specifically, the recesses 116B are formed at six positions at intervals of 60 ° in the circumferential direction of the collar portion 112B.
  • a protruding portion 118B (first protruding portion) is formed on the outer peripheral portion of the flange portion 112B between the recesses 116B and the recesses 116B that are adjacent to each other in the circumferential direction.
  • the protruding portion 118B protrudes outward in the radial direction of the flange portion 112B from the most recessed position of the recess 116B.
  • the protruding portions 118B of the flange portion 112B all have the same shape.
  • the length of the protruding portion 118B in the circumferential direction of the flange portion 112B is shorter than the length of the recess 116B in the same direction.
  • the protruding portions 118B are formed at even-numbered locations at equal intervals in the circumferential direction of the flange portion 112B. Specifically, the protruding portions 118B are formed at six locations at intervals of 60 ° in the circumferential direction of the flange portion 112B.
  • a plurality of recesses 216B having the same shape are formed in the collar portion 212B.
  • the recess 216B (second recess) is recessed inward in the radial direction with respect to the outermost peripheral surface 214B having a cylindrical surface shape.
  • the outer diameter of the outermost outer peripheral surface 214B is the same as the outer diameter of the outermost outer peripheral surface 114B.
  • the recess 216B has the same shape as the recess 116B.
  • the recesses 216B are formed at even-numbered positions at equal intervals in the circumferential direction of the collar portion 212B. Specifically, the recesses 216B are formed at six positions at intervals of 60 ° in the circumferential direction of the collar portion 212B.
  • the flange portion 212B aligns the position of the recess 216B in the circumferential direction with the protruding portion 118B of the collar portion 112B.
  • a protruding portion 218B (second protruding portion) is formed on the outer peripheral portion of the flange portion 212B between the recesses 216B and the recesses 216B that are adjacent to each other in the circumferential direction.
  • the protruding portion 218B (second protruding portion) protrudes outward in the radial direction of the flange portion 212B from the most recessed position of the recess 216B.
  • the protruding portions 218B of the flange portion 212B all have the same shape.
  • the protrusion 218B has the same shape as the protrusion 118B.
  • the flange portion 212B aligns the position of the protrusion 218B in the circumferential direction with the recess 116B of the collar portion 112B.
  • the length of the protruding portion 218B in the circumferential direction of the flange portion 212B is shorter than the length of the concave portion 216B in the same direction.
  • the protruding portions 218B are formed at even-numbered locations at equal intervals in the circumferential direction of the flange portion 212B. Specifically, the protruding portions 218B are formed at six locations at intervals of 60 ° in the circumferential direction of the flange portion 212B.
  • the flange portion 112B and the flange portion 212B have the same shape, and the positions (phases) of the protrusion 118B and the protrusion 218B are shifted in the circumferential direction of the valve body 94B.
  • the protruding portion 118B and the protruding portion 218B are arranged so as to be offset in the circumferential direction of the valve body 94B.
  • the maximum outer diameters of the flange portions 112B and 212B are slightly smaller than the inner diameter of the first main hole portion 33.
  • valve body 94B is inserted into the first main hole portion 33 with the flange portion 112B on the seat portion 104 side and the collar portion 212B on the side opposite to the seat portion 104.
  • the valve body 94B can be seated on the seat portion 104 at the seating body 123 provided on the bottom portion 202 of the shaft portion 111A.
  • the portion of the valve body 94B other than the seating body 123 is a metal valve body 124B whose material is different from that of the seating body 123, for example.
  • the valve body 124B comprises the entire shaft portion 111A except the seating body 123, the collar portion 112B, and the collar portion 212B, and is integrally molded.
  • the flange portion 112B is formed with an even number of recesses 116B and protrusions 118B
  • the collar portion 212B is formed with an even number of recesses 216B and protrusions 218B, respectively.
  • the protrusions 118B are provided at positions 180 degrees opposite to all the protrusions 118B of the flange 112B in the circumferential direction of the respective valve bodies 94B.
  • the recesses 116B are provided at positions 180 degrees opposite to all the recesses 116B of the flange portion 112B in the circumferential direction of the respective valve bodies 94B.
  • the protruding portions 218B are provided at positions 180 degrees opposite to all the protruding portions 218B of the flange portion 212B in the circumferential direction of the respective valve bodies 94B.
  • the recesses 216B are provided at positions 180 degrees opposite to all the recesses 216B of the flange portion 212B in the circumferential direction of the respective valve bodies 94B.
  • recesses 216B of the flange portion 212B are provided at positions 180 degrees opposite to all the protrusions 118B of the flange portion 112B in the circumferential direction of the respective valve bodies 94B. Further, a recess 116B of the flange portion 112B is provided at a position 180 degrees opposite to all the protruding portions 218B of the flange portion 212B in the circumferential direction of each valve body 94B.
  • the collar portion 112B has a plurality of protrusions 118B that project outward in the radial direction.
  • the flange portion 212B has a recess 216B that is recessed inward in the radial direction at a position opposite to each other in the circumferential direction of the valve body 94B of each of the plurality of protruding portions 118B. Further, the flange portion 212B has a plurality of protruding portions 218B protruding outward in the radial direction.
  • the flange portion 112B has a recess 116B that is recessed inward in the radial direction at a position on the opposite side of the valve body 94B in the circumferential direction of each of the plurality of protruding portions 218B.
  • the valve body 94B is provided with a collar portion 112B on the bottom 142 side of the valve chamber 141A.
  • the collar portion 112B extends radially outward from the seat portion 104.
  • the plurality of projecting portions 118B of the flange portion 112B project radially outward from the shaft portion 111A toward the inner peripheral surface 138 of the valve chamber 141A.
  • the valve body 94B is provided with a flange portion 212B extending radially outward from the shaft portion 111A toward the inner peripheral surface 138 of the valve chamber 141A on the side opposite to the bottom portion 142 of the valve chamber 141A.
  • the flange portion 212B is provided with a plurality of protrusions 218B at positions deviated from the protrusion 118B of the collar 112B in the circumferential direction.
  • the projecting portion 218B projects radially outward from the shaft portion 111A toward the inner peripheral surface 138 of the valve chamber 141A.
  • the first outlet 61 intersects, specifically, is orthogonal to the direction connecting the inflow port 106 and the valve chamber 141A. Therefore, when air flows from the inflow port 106 to the first outlet 61 via the valve chamber 141A, the air flowing into the valve chamber 141A from the inflow port 106 is mainly the recess 116B of the flange portion 112B of the valve body 94B. After passing between the valve chamber 141A and the inner peripheral surface 138 of the valve chamber 141A in the axial direction of the valve body 94B, the air flows out from the first outlet 61 by changing the direction in the radial direction of the valve body 94B.
  • the second outlet 71 intersects, specifically, is orthogonal to the direction connecting the inflow port 106 and the valve chamber 141A. Therefore, when air flows from the inflow port 106 to the second outflow port 71 via the valve chamber 141A, the air flowing into the valve chamber 141A from the inflow port 106 is mainly the recess 116B of the flange portion 112B of the valve body 94B. After passing between the valve chamber 141A and the inner peripheral surface 138 of the valve chamber 141A in the axial direction of the valve body 94B, the air flows out from the second outlet 71 by changing the direction in the radial direction of the valve body 94B.
  • the inflow port 106 into which the air of one air spring 155 flows in is formed at the bottom 142 of the valve chamber 141A, and the air flows out to the other air spring 156.
  • the first outlet 61 is formed on the inner peripheral surface 138 of the valve chamber 141A. With such a structure, the first outlet 61 intersects the direction connecting the inlet 106 and the valve chamber 141A. Therefore, when air flows from the inflow port 106 to the first outlet 61 via the valve chamber 141A, the air flowing into the valve chamber 141A from the inflow port 106 is mainly the recess 116B of the flange portion 112B of the valve body 94B.
  • the air flows out from the first outlet 61 by changing the direction in the radial direction of the valve body 94B.
  • the recess 116B is located on the side opposite to the first outlet 61 in the circumferential direction of the valve body 94B, the air flow passing through the recess 116B and heading toward the first outlet 61 causes the valve body 94B to become the first. A large radial force acts toward the 1 outlet 61.
  • valve body 94B may tilt in the valve chamber 141A so that the flange portion 212B on the side opposite to the seat portion 104 is closer to the first outlet 61 than the collar portion 112B on the seat portion 104 side. is there.
  • an arcuate protruding portion 218B of the flange portion 212B is provided at a position opposite to the circumferential direction of the recess 116B of the flange portion 112B of the valve body 94B. Therefore, even if the valve body 94B is tilted as described above, the protruding portion 218B makes line contact with the inner peripheral surface 138 of the valve chamber 141A, and the contact surface pressure is lowered. Therefore, the axial movement of the valve body 94B becomes smooth. Therefore, it is possible to suppress variations in valve opening pressure.
  • the protruding portion 118B and the protruding portion 218B are arranged so as to be offset in the circumferential direction, the weight imbalance of the valve body 94B can be suppressed.
  • the first aspect of the embodiment described above is arranged in a communication passage connecting two air springs provided between the vehicle body and the bogie, and the communication passage is provided according to the pressure difference between the two air springs.
  • a differential pressure valve that opens and closes.
  • the differential pressure valve is formed in the valve chamber, the circular valve body provided in the valve chamber, the inflow port formed at the bottom of the valve chamber, and the air of one of the air springs flows into the valve chamber, and the inside of the valve chamber.
  • An outflow port formed on the peripheral surface and allowing air to flow out to the other air spring, a seat portion formed on the bottom of the valve chamber so as to surround the inflow port and on which the valve body is seated, and the valve body. It has an urging member that urges the seat portion in the valve closing direction.
  • the valve body is provided with a first flange portion extending radially outward from the seat portion on the bottom portion side.
  • the first flange portion includes a plurality of first protruding portions that project radially outward toward the inner peripheral surface of the valve chamber, and radially inward at positions opposite to the circumferential direction of the first protruding portion. It is provided with a first recess that is recessed. This makes it possible to suppress variations in valve opening pressure.
  • the first protrusions are formed at intervals of 120 ° in the circumferential direction. This makes it possible to suppress variations in valve opening pressure. In addition, the man-hours for processing the valve body can be reduced.
  • the valve body has a second flange portion extending radially outward toward the inner peripheral surface of the valve chamber, which is opposite to the bottom portion.
  • the second flange portion has a diameter at a position opposite to the circumferential direction of the plurality of second projecting portions protruding outward in the radial direction toward the inner peripheral surface of the valve chamber. It is provided with a second recess that is recessed inward in the direction. This makes it possible to suppress variations in valve opening pressure.
  • the second protrusions are formed at intervals of 120 ° in the circumferential direction. This makes it possible to suppress variations in valve opening pressure.
  • the first protruding portion and the second protruding portion are arranged so as to coincide with each other in the circumferential direction. As a result, the man-hours for processing the valve body can be reduced, and the air flow around the valve body can be smoothed.
  • the first protruding portion and the second protruding portion are arranged so as to be offset in the circumferential direction. As a result, the imbalance in the weight of the valve body can be suppressed.
  • a seventh aspect is a differential pressure valve that is arranged in a communication passage connecting two air springs provided between the vehicle body and the bogie and opens and closes the communication passage according to the pressure difference between the two air springs. is there.
  • the differential pressure valve is formed in the valve chamber, the circular valve body provided in the valve chamber, the inflow port formed at the bottom of the valve chamber, and the air of one of the air springs flows into the valve chamber, and the inside of the valve chamber.
  • An outflow port formed on the peripheral surface and allowing air to flow out to the other air spring, a seat portion formed on the bottom of the valve chamber so as to surround the inflow port and on which the valve body is seated, and the valve body. It has an urging member that urges the seat portion in the valve closing direction.
  • the valve body is provided with a first flange portion that extends radially outward from the seat portion on the bottom portion side, and has a diameter toward the inner peripheral surface of the valve chamber on the side opposite to the bottom portion. It is provided with a second collar that extends outward in the direction.
  • the first flange portion includes a plurality of first projecting portions that project radially outward toward the inner peripheral surface of the valve chamber.
  • the second flange portion is provided with a plurality of second protruding portions that project radially outward toward the inner peripheral surface of the valve chamber at a position deviated from the first protruding portion in the circumferential direction. This makes it possible to suppress variations in valve opening pressure.

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  • Aviation & Aerospace Engineering (AREA)
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Abstract

This differential pressure valve has: valve chambers (141); circular valve bodies (94) that are provided in the valve chambers (141); inlets (106) which are formed in the bottoms (142) of the valve chambers (141) and through which air from one air springs flows; outlets (61, 71) which are formed in the inner circumferential surfaces (138) of the valve chambers (141) and through which the air flows out to the other air springs; sheets (104) that are formed in the bottoms (142) of the valve chambers (141) so as to surround the inlets (106); and biasing members (95) that bias the valve bodies (94) in the valve closing direction toward the sheets (104). The valve bodies (94) are each provided with a first flange (112) on the corresponding bottom (142) side. The first flange (112) is provided with a plurality of first projections (118) that project radially outward, and first recesses (116) that are recessed radially inward at positions opposite to the first projections (118) in the circumferential direction.

Description

差圧弁Differential pressure valve
　本発明は、差圧弁に関する。
　本願は、２０１９年６月２６日に、日本に出願された特願２０１９－１１８６９０号に基づき優先権を主張し、その内容をここに援用する。 The present invention relates to a differential pressure valve.
The present application claims priority based on Japanese Patent Application No. 2019-118690 filed in Japan on June 26, 2019, the contents of which are incorporated herein by reference.
　鉄道車両には、車体と台車との間に設けられる２つの空気ばねを繋ぐ連通路に、２つの空気ばね間の圧力差に応じて連通路を開閉する差圧弁が設けられている（例えば、特許文献１，２参照）。 Railroad vehicles are provided with a differential pressure valve that opens and closes the continuous passage according to the pressure difference between the two air springs in the continuous passage that connects the two air springs provided between the vehicle body and the bogie (for example,). See Patent Documents 1 and 2).
特開２００２－１２０７２３号公報JP-A-2002-120723 特開２０１２－２０２５２０号公報Japanese Unexamined Patent Publication No. 2012-202520
　差圧弁においては、開弁圧のばらつきを抑制することが求められている。 In the differential pressure valve, it is required to suppress the variation in valve opening pressure.
　本発明は、開弁圧のばらつきを抑制することが可能となる差圧弁を提供する。 The present invention provides a differential pressure valve capable of suppressing variations in valve opening pressure.
　本発明の第１の態様によれば、差圧弁は、弁室と、該弁室内に設けられる円形状の弁体と、前記弁室の底部に形成され、一方の前記空気ばねの空気が流入する流入口と、前記弁室の内周面に形成され、他方の前記空気ばねへ空気を流出する流出口と、前記弁室の底部に前記流入口を囲むように形成されて前記弁体が着座するシート部と、前記弁体を前記シート部に向けた閉弁方向に付勢する付勢部材と、を有する。前記弁体は、前記シート部よりも径方向外方に延出する第１鍔部を前記底部側に備える。該第１鍔部は、前記弁室の内周面に向かって径方向外方に突出する複数の第１突出部と、該第１突出部の周方向反対側の位置で径方向内方に凹む第１凹部と、を備える。 According to the first aspect of the present invention, the differential pressure valve is formed in the valve chamber, the circular valve body provided in the valve chamber, and the bottom of the valve chamber, and the air of one of the air springs flows in. The valve body is formed on the inner peripheral surface of the valve chamber to flow out air to the other air spring, and is formed at the bottom of the valve chamber so as to surround the inlet. It has a seat portion to be seated and an urging member for urging the valve body toward the seat portion in a valve closing direction. The valve body is provided with a first flange portion extending radially outward from the seat portion on the bottom portion side. The first flange portion includes a plurality of first protruding portions that project radially outward toward the inner peripheral surface of the valve chamber, and radially inward at positions opposite to the circumferential direction of the first protruding portion. It is provided with a first recess that is recessed.
　本発明の第２の態様によれば、差圧弁は、弁室と、該弁室内に設けられる円形状の弁体と、前記弁室の底部に形成され、一方の前記空気ばねの空気が流入する流入口と、前記弁室の内周面に形成され、他方の前記空気ばねへ空気を流出する流出口と、前記弁室の底部に前記流入口を囲むように形成されて前記弁体が着座するシート部と、前記弁体を前記シート部に向けた閉弁方向に付勢する付勢部材と、を有する。前記弁体は、前記シート部よりも径方向外方に延出する第１鍔部を前記底部側に備えると共に、前記底部とは反対側に、前記弁室の内周面に向かって径方向外方に延出する第２鍔部を備える。前記第１鍔部は、前記弁室の内周面に向かって径方向外方に突出する複数の第１突出部を備える。前記第２鍔部は、前記第１突出部とは周方向にずれた位置に、前記弁室の内周面に向かって径方向外方に突出する複数の第２突出部を備える。 According to the second aspect of the present invention, the differential pressure valve is formed in the valve chamber, the circular valve body provided in the valve chamber, and the bottom of the valve chamber, and the air of one of the air springs flows in. The valve body is formed on the inner peripheral surface of the valve chamber to flow out air to the other air spring, and is formed at the bottom of the valve chamber so as to surround the inlet. It has a seat portion to be seated and an urging member for urging the valve body toward the seat portion in a valve closing direction. The valve body is provided with a first flange portion that extends radially outward from the seat portion on the bottom side, and is radially opposite to the bottom portion toward the inner peripheral surface of the valve chamber. It is equipped with a second brim that extends outward. The first flange portion includes a plurality of first projecting portions that project radially outward toward the inner peripheral surface of the valve chamber. The second flange portion is provided with a plurality of second protruding portions that project radially outward toward the inner peripheral surface of the valve chamber at a position deviated from the first protruding portion in the circumferential direction.
　上記した差圧弁によれば、開弁圧のばらつきを抑制することが可能となる。 According to the differential pressure valve described above, it is possible to suppress variations in valve opening pressure.
本発明の第１実施形態に係る差圧弁を示す断面図である。It is sectional drawing which shows the differential pressure valve which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係る差圧弁の弁体を示す正面図である。It is a front view which shows the valve body of the differential pressure valve which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係る差圧弁の弁体を示す下面図である。It is a bottom view which shows the valve body of the differential pressure valve which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係る差圧弁およびこれが接続される車両を示す概略図である。It is the schematic which shows the differential pressure valve which concerns on 1st Embodiment of this invention, and the vehicle to which it is connected. 本発明の第２実施形態に係る差圧弁を示す断面図である。It is sectional drawing which shows the differential pressure valve which concerns on 2nd Embodiment of this invention. 本発明の第２実施形態に係る差圧弁の弁体を示す平面図である。It is a top view which shows the valve body of the differential pressure valve which concerns on 2nd Embodiment of this invention. 本発明の第２実施形態に係る差圧弁の弁体を示す正面図である。It is a front view which shows the valve body of the differential pressure valve which concerns on 2nd Embodiment of this invention. 本発明の第３実施形態に係る差圧弁を示す断面図である。It is sectional drawing which shows the differential pressure valve which concerns on 3rd Embodiment of this invention. 本発明の第３実施形態に係る差圧弁の弁体を示す正面図である。It is a front view which shows the valve body of the differential pressure valve which concerns on 3rd Embodiment of this invention. 本発明の第３実施形態に係る差圧弁の弁体を示す下面図である。It is a bottom view which shows the valve body of the differential pressure valve which concerns on 3rd Embodiment of this invention.
　本発明の実施形態を図面に基づいて説明する。 An embodiment of the present invention will be described with reference to the drawings.
［第１実施形態］
　第１実施形態を図１～図４に基づいて説明する。 [First Embodiment]
The first embodiment will be described with reference to FIGS. 1 to 4.
　図１に示すように、第１実施形態に係る差圧弁１１は、金属製のハウジング１２を有している。ハウジング１２には、外面に２箇所の第１座部１５および第２座部１６が並設されている。第１座部１５および第２座部１６は、それぞれの外側の座面が同一平面に配置されている。ハウジング１２には、第１弁穴２１と、第２弁穴２２と、が穿設されている。第１弁穴２１は、第１座部１５からハウジング１２内の中間所定位置まで、第１座部１５の座面に対し垂直に穿設されている。第２弁穴２２は、第２座部１６からハウジング１２内の中間所定位置まで、第２座部１６の座面に対し垂直に穿設されている。第１弁穴２１と第２弁穴２２とは平行をなしている。第１弁穴２１と第２弁穴２２とは同形状であり、軸方向位置を合わせている。 As shown in FIG. 1, the differential pressure valve 11 according to the first embodiment has a metal housing 12. The housing 12 has two first seats 15 and a second seat 16 arranged side by side on the outer surface. The outer seat surfaces of the first seat portion 15 and the second seat portion 16 are arranged on the same plane. A first valve hole 21 and a second valve hole 22 are bored in the housing 12. The first valve hole 21 is bored perpendicularly to the seat surface of the first seat portion 15 from the first seat portion 15 to an intermediate predetermined position in the housing 12. The second valve hole 22 is bored perpendicularly to the seat surface of the second seat portion 16 from the second seat portion 16 to an intermediate predetermined position in the housing 12. The first valve hole 21 and the second valve hole 22 are parallel to each other. The first valve hole 21 and the second valve hole 22 have the same shape and are aligned in the axial direction.
　第１弁穴２１は、最も奥側から順に、第１底穴部３１、第１取付穴部３２、第１主穴部３３および第１ネジ穴部３４を有している。これら第１底穴部３１、第１取付穴部３２、第１主穴部３３および第１ネジ穴部３４は、中心軸線を一致させた同軸状に配置されている。第１取付穴部３２の内径は、第１底穴部３１の内径よりも大径である。第１主穴部３３の内径は、第１取付穴部３２の内径よりも大径である。第１ネジ穴部３４の最小内径は、第１主穴部３３の内径よりも大径である。第１弁穴２１は、第１ネジ穴部３４が、第１座部１５の位置でハウジング１２の外に開口している。 The first valve hole 21 has a first bottom hole portion 31, a first mounting hole portion 32, a first main hole portion 33, and a first screw hole portion 34 in this order from the innermost side. The first bottom hole portion 31, the first mounting hole portion 32, the first main hole portion 33, and the first screw hole portion 34 are arranged coaxially with their central axes aligned. The inner diameter of the first mounting hole portion 32 is larger than the inner diameter of the first bottom hole portion 31. The inner diameter of the first main hole portion 33 is larger than the inner diameter of the first mounting hole portion 32. The minimum inner diameter of the first screw hole portion 34 is larger than the inner diameter of the first main hole portion 33. In the first valve hole 21, the first screw hole portion 34 is opened to the outside of the housing 12 at the position of the first seat portion 15.
　第２弁穴２２は、最も奥側から順に、第２底穴部４１、第２取付穴部４２、第２主穴部４３および第２ネジ穴部４４を有している。これら第２底穴部４１、第２取付穴部４２、第２主穴部４３および第２ネジ穴部４４は中心軸線を一致させた同軸状に配置されている。第２取付穴部４２の内径は、第２底穴部４１の内径よりも大径である。第２主穴部４３の内径は、第２取付穴部４２の内径よりも大径である。第２ネジ穴部４４の最小内径は、第１主穴部３３の内径よりも大径である。第２弁穴２２は、第２ネジ穴部４４が、第２座部１６の位置でハウジング１２の外に開口している。 The second valve hole 22 has a second bottom hole portion 41, a second mounting hole portion 42, a second main hole portion 43, and a second screw hole portion 44 in this order from the innermost side. The second bottom hole portion 41, the second mounting hole portion 42, the second main hole portion 43, and the second screw hole portion 44 are arranged coaxially with their central axes aligned. The inner diameter of the second mounting hole portion 42 is larger than the inner diameter of the second bottom hole portion 41. The inner diameter of the second main hole portion 43 is larger than the inner diameter of the second mounting hole portion 42. The minimum inner diameter of the second screw hole portion 44 is larger than the inner diameter of the first main hole portion 33. In the second valve hole 22, the second screw hole portion 44 is opened to the outside of the housing 12 at the position of the second seat portion 16.
　ハウジング１２には、第１内部通路５１と、第２内部通路５２と、第１流入通路５３と、第２流入通路５４とが形成されている。第１内部通路５１は、一端が第１主穴部３３に開口し、他端が第２底穴部４１に開口する。第２内部通路５２は、一端が第２主穴部４３に開口し、他端が第１底穴部３１に開口する。第１流入通路５３は、第１底穴部３１をハウジング１２の外に開口させる。第２流入通路５４は、第２底穴部４１をハウジング１２の外に開口させる。 The housing 12 is formed with a first internal passage 51, a second internal passage 52, a first inflow passage 53, and a second inflow passage 54. One end of the first internal passage 51 opens into the first main hole 33, and the other end opens into the second bottom hole 41. One end of the second internal passage 52 opens into the second main hole 43, and the other end opens into the first bottom hole 31. The first inflow passage 53 opens the first bottom hole portion 31 to the outside of the housing 12. The second inflow passage 54 opens the second bottom hole 41 to the outside of the housing 12.
　第１内部通路５１は、第１主穴部３３に開口する第１流出口６１（流出口）と、第２底穴部４１に開口する第１連通口６２と、第１流出口６１と第１連通口６２とを結ぶ第１中間通路部６３とを有している。第１流出口６１は、第１主穴部３３の軸方向の中間所定位置に開口しており、第１主穴部３３の径方向に沿って延びている。第１連通口６２は、第２底穴部４１の径方向に沿って延びている。第１中間通路部６３は、第１弁穴２１の軸方向に延びている。 The first internal passage 51 includes a first outlet 61 (outlet) that opens in the first main hole 33, a first communication port 62 that opens in the second bottom hole 41, and a first outlet 61 and a first. It has a first intermediate passage portion 63 connecting the one communication port 62. The first outlet 61 is opened at an intermediate predetermined position in the axial direction of the first main hole portion 33, and extends along the radial direction of the first main hole portion 33. The first communication port 62 extends along the radial direction of the second bottom hole portion 41. The first intermediate passage portion 63 extends in the axial direction of the first valve hole 21.
　第２内部通路５２は、第２主穴部４３に開口する第２流出口７１（流出口）と、第１底穴部３１に開口する第２連通口７２と、第２流出口７１と第２連通口７２とを結ぶ第２中間通路部７３とを有している。第２流出口７１は、第２主穴部４３の軸方向の中間所定位置に開口しており、第２主穴部４３の径方向に沿って延びている。第２連通口７２は、第１底穴部３１の径方向に沿って延びている。第２中間通路部７３は、第２弁穴２２の軸方向に延びている。 The second internal passage 52 includes a second outlet 71 (outlet) that opens in the second main hole 43, a second communication port 72 that opens in the first bottom hole 31, a second outlet 71, and a second outlet. It has a second intermediate passage portion 73 connecting the two communication ports 72. The second outlet 71 is opened at an intermediate predetermined position in the axial direction of the second main hole portion 43, and extends along the radial direction of the second main hole portion 43. The second communication port 72 extends along the radial direction of the first bottom hole portion 31. The second intermediate passage portion 73 extends in the axial direction of the second valve hole 22.
　差圧弁１１は、第１弁穴２１に組み込まれる第１弁構成部８１と、第２弁穴２２に組み込まれる第２弁構成部８２と、を有している。第１弁穴２１と第１弁構成部８１とが第１弁機構８３を構成している。第２弁穴２２と第２弁構成部８２とが第２弁機構８４を構成している。第１弁構成部８１および第２弁構成部８２は同様の構成である。第１弁穴２１および第２弁穴２２も同形状であることから、第１弁機構８３および第２弁機構８４も同様の構成となる。 The differential pressure valve 11 has a first valve component 81 incorporated in the first valve hole 21 and a second valve component 82 incorporated in the second valve hole 22. The first valve hole 21 and the first valve component 81 constitute the first valve mechanism 83. The second valve hole 22 and the second valve component 82 constitute the second valve mechanism 84. The first valve component 81 and the second valve component 82 have the same configuration. Since the first valve hole 21 and the second valve hole 22 have the same shape, the first valve mechanism 83 and the second valve mechanism 84 have the same configuration.
　ここでは、同様の構成である第１弁構成部８１および第２弁構成部８２のうちの第１弁構成部８１を例にとり説明する。 Here, the first valve component 81 of the first valve component 81 and the second valve component 82 having the same configuration will be described as an example.
　第１弁構成部８１は、シート部材９１と、蓋部材９２と、ワッシャ９３と、付勢部材９５とを有している。シート部材９１は、第１弁穴２１の第１取付穴部３２に嵌合される。蓋部材９２は、第１弁穴２１の第１ネジ穴部３４に螺合される。ワッシャ９３は、蓋部材９２と第１座部１５との間に介装される。弁体９４は、第１主穴部３３内に移動可能に設けられる。付勢部材９５は、弁体９４をシート部材９１の方向に付勢する。 The first valve component 81 has a seat member 91, a lid member 92, a washer 93, and an urging member 95. The seat member 91 is fitted into the first mounting hole portion 32 of the first valve hole 21. The lid member 92 is screwed into the first screw hole portion 34 of the first valve hole 21. The washer 93 is interposed between the lid member 92 and the first seat portion 15. The valve body 94 is movably provided in the first main hole portion 33. The urging member 95 urges the valve body 94 in the direction of the seat member 91.
　シート部材９１には、径方向の中央に、軸方向に延びる通路穴１０１が貫通形成されている。シート部材９１は、円環状のベース部１０３と、ベース部１０３の外径よりも外径が小径でベース部１０３の軸方向の一端から軸方向の外側に突出する円環状のシート部１０４とを有している。ベース部１０３とシート部１０４とは、中心軸線を一致させた同軸状に配置されている。シート部材９１は、ベース部１０３が第１取付穴部３２に嵌合されてハウジング１２に固定される。このときのシート部材９１の向きは、シート部１０４が第１弁穴２１の第１主穴部３３側に配置される向きである。シート部１０４は通路穴１０１を全周にわたって囲んでいる。このように、ハウジング１２とは別体のシート部材９１にシート部１０４が形成されている。 The seat member 91 has a passage hole 101 extending in the axial direction penetrating the center in the radial direction. The seat member 91 has an annular base portion 103 and an annular seat portion 104 having an outer diameter smaller than the outer diameter of the base portion 103 and projecting outward from one end in the axial direction of the base portion 103. Have. The base portion 103 and the seat portion 104 are arranged coaxially with their central axes aligned. In the seat member 91, the base portion 103 is fitted into the first mounting hole portion 32 and fixed to the housing 12. The orientation of the seat member 91 at this time is the orientation in which the seat portion 104 is arranged on the side of the first main hole portion 33 of the first valve hole 21. The seat portion 104 surrounds the passage hole 101 over the entire circumference. In this way, the seat portion 104 is formed on the seat member 91 that is separate from the housing 12.
　ハウジング１２の第１取付穴部３２に固定された状態のシート部材９１の通路穴１０１は、第１底穴部３１に連通し、第１底穴部３１とで流入口１０６を構成している。シート部１０４は、この流入口１０６を囲むように形成されている。第１弁構成部８１のシート部材９１の通路穴１０１を含む流入口１０６は、第１流入通路５３に常時連通する。ハウジング１２には、第２取付穴部４２にも、第２弁構成部８２のシート部材９１が固定される。このシート部材９１の通路穴１０１と第２底穴部４１とで構成される流入口１０６は、第２流入通路５４に常時連通する。 The passage hole 101 of the seat member 91 fixed to the first mounting hole 32 of the housing 12 communicates with the first bottom hole 31 and constitutes the inflow port 106 together with the first bottom hole 31. .. The seat portion 104 is formed so as to surround the inflow port 106. The inflow port 106 including the passage hole 101 of the seat member 91 of the first valve component 81 always communicates with the first inflow passage 53. In the housing 12, the seat member 91 of the second valve constituent portion 82 is also fixed to the second mounting hole portion 42. The inflow port 106 composed of the passage hole 101 of the sheet member 91 and the second bottom hole portion 41 always communicates with the second inflow passage 54.
　図２，図３に示すように、弁体９４は、円形状である。具体的には、弁体９４は、段付きの円柱状である。弁体９４は、中実の円柱状の軸部１１１と、軸部１１１の軸方向一端側から径方向外側に広がる円板状の鍔部１１２（第１鍔部）とを有している。軸部１１１と鍔部１１２とは中心軸線を一致させた同軸状に配置されている。鍔部１１２の外周部には、円筒面状の最外周面１１４よりも径方向内方に凹む複数の同形状の凹部１１６（第１凹部）が形成されている。凹部１１６は、鍔部１１２の周方向に等間隔で奇数箇所形成されている。具体的には、凹部１１６は、鍔部１１２の周方向に１２０°間隔で３箇所形成されている。 As shown in FIGS. 2 and 3, the valve body 94 has a circular shape. Specifically, the valve body 94 is a stepped columnar shape. The valve body 94 has a solid columnar shaft portion 111 and a disc-shaped flange portion 112 (first flange portion) extending radially outward from one end side in the axial direction of the shaft portion 111. The shaft portion 111 and the flange portion 112 are arranged coaxially with their central axes aligned. A plurality of recesses 116 (first recesses) having the same shape that are recessed inward in the radial direction from the cylindrical outermost peripheral surface 114 are formed on the outer peripheral portion of the flange portion 112. The recesses 116 are formed at odd-numbered locations at equal intervals in the circumferential direction of the collar portion 112. Specifically, the recesses 116 are formed at three positions at 120 ° intervals in the circumferential direction of the collar portion 112.
　これにより、鍔部１１２の外周部には、周方向に隣り合う凹部１１６と凹部１１６との間に、突出部１１８（第１突出部）が形成されている。突出部１１８（第１突出部）は、凹部１１６の最も凹んだ位置よりも鍔部１１２の径方向における外方に突出する。鍔部１１２の突出部１１８は全て同形状である。鍔部１１２の周方向における突出部１１８の長さは、凹部１１６の同方向の長さよりも長い。突出部１１８は、鍔部１１２の周方向に等間隔で奇数箇所形成されている。具体的には、突出部１１８は、鍔部１１２の周方向に１２０°間隔で３箇所形成されている。 As a result, a protruding portion 118 (first protruding portion) is formed on the outer peripheral portion of the flange portion 112 between the recesses 116 and the recesses 116 that are adjacent to each other in the circumferential direction. The protruding portion 118 (first protruding portion) protrudes outward in the radial direction of the collar portion 112 from the most recessed position of the recess 116. The protruding portions 118 of the flange portion 112 all have the same shape. The length of the protrusion 118 in the circumferential direction of the collar 112 is longer than the length of the recess 116 in the same direction. The protruding portions 118 are formed at odd-numbered locations at equal intervals in the circumferential direction of the flange portion 112. Specifically, the protruding portions 118 are formed at three locations at 120 ° intervals in the circumferential direction of the flange portion 112.
　鍔部１１２は、複数の突出部１１８と軸部１１１との間が円環状の鍔基端部１２１となっている。この鍔基端部１２１から径方向外方に複数の突出部１１８が突出している。図１に示すように、鍔基端部１２１は、外径が、シート部材９１のシート部１０４の外径よりも大径となっている。言い換えれば、鍔部１１２の最小外径が、シート部１０４の外径よりも大径となっている。よって、鍔部１１２の最大外径、すなわち弁体９４の最大外径も、シート部１０４の外径よりも大径となっている。鍔部１１２の最大外径は、第１主穴部３３の内径よりも若干小径となっている。 The collar portion 112 has an annular collar base end portion 121 between the plurality of protruding portions 118 and the shaft portion 111. A plurality of projecting portions 118 project radially outward from the brim base end portion 121. As shown in FIG. 1, the outer diameter of the collar base end portion 121 is larger than the outer diameter of the seat portion 104 of the seat member 91. In other words, the minimum outer diameter of the flange portion 112 is larger than the outer diameter of the seat portion 104. Therefore, the maximum outer diameter of the flange portion 112, that is, the maximum outer diameter of the valve body 94 is also larger than the outer diameter of the seat portion 104. The maximum outer diameter of the flange portion 112 is slightly smaller than the inner diameter of the first main hole portion 33.
　弁体９４は、鍔部１１２がシート部１０４側となる向きで、第１主穴部３３内に挿入される。この状態で、弁体９４はシート部１０４に着座可能となる。弁体９４は、鍔部１１２の軸部１１１が突出する側とは反対側の端部の径方向中央に円板状の着座体１２３を有している。弁体９４は、シート部１０４に着座する部分がこの着座体１２３で構成されている。言い換えれば、着座体１２３は鍔基端部１２１を構成している。弁体９４は、着座体１２３以外の部分が弁本体１２４となっている。弁本体１２４は、着座体１２３とは異なる材質で構成されている。例えば、着座体１２３は合成樹脂製であり、弁本体１２４は金属製である。弁本体１２４は、軸部１１１の鍔部１１２よりも突出する側の全部と、軸部１１１の鍔部１１２と軸方向に重なる部分と、鍔部１１２の軸部１１１が突出する側の部分と、鍔部１１２の径方向外側の部分とを構成している。弁本体１２４は、一体成形されている。 The valve body 94 is inserted into the first main hole portion 33 with the flange portion 112 facing the seat portion 104 side. In this state, the valve body 94 can be seated on the seat portion 104. The valve body 94 has a disc-shaped seating body 123 at the center in the radial direction of the end portion of the flange portion 112 on the side opposite to the protruding side of the shaft portion 111. The portion of the valve body 94 that is seated on the seat portion 104 is composed of the seated body 123. In other words, the seating body 123 constitutes the collar base end portion 121. The portion of the valve body 94 other than the seating body 123 is the valve body 124. The valve body 124 is made of a material different from that of the seating body 123. For example, the seating body 123 is made of synthetic resin, and the valve body 124 is made of metal. The valve body 124 includes the entire side of the shaft portion 111 that protrudes from the flange portion 112, a portion that overlaps the flange portion 112 of the shaft portion 111 in the axial direction, and a portion of the flange portion 112 that protrudes from the shaft portion 111. , Consists of a radial outer portion of the collar portion 112. The valve body 124 is integrally molded.
　図３に示すように、鍔部１１２の外周部には、凹部１１６および突出部１１８がそれぞれ奇数箇所形成されている。このため、全ての突出部１１８に対して、それぞれの鍔部１１２の周方向における１８０度反対側の位置に凹部１１６が設けられている。言い換えれば、鍔部１１２は、径方向外方に突出する複数の突出部１１８と、これら複数の突出部１１８のそれぞれの、鍔部１１２の周方向における反対側の位置で径方向内方に凹む凹部１１６とを備えている。 As shown in FIG. 3, a concave portion 116 and a protruding portion 118 are formed at odd numbers on the outer peripheral portion of the flange portion 112, respectively. For this reason, the recesses 116 are provided at positions 180 degrees opposite to all the protruding portions 118 in the circumferential direction of the respective flange portions 112. In other words, the flange portion 112 is recessed inward in the radial direction at positions of the plurality of projecting portions 118 projecting outward in the radial direction and each of the plurality of projecting portions 118 in the circumferential direction of the flange portion 112. It is provided with a recess 116.
　図１に示すように、蓋部材９２は、軸方向一側から順に、頭部１３１、円板部１３２、ネジ軸部１３３および突出軸部１３４を有している。頭部１３１は、スパナ等の螺合工具に係合される部分である。頭部１３１は、外形が六角径状をなしている。円板部１３２は、頭部１３１の最大外径よりも大径の外径を有している。ネジ軸部１３３は、最大外径が円板部１３２の外径よりも小径である。突出軸部１３４は、円柱状である。突出軸部１３４は、ネジ軸部１３３の最小外径よりも小径である。頭部１３１と、円板部１３２と、ネジ軸部１３３と、突出軸部１３４と、は中心軸線を一致させた同軸状に配置されている。 As shown in FIG. 1, the lid member 92 has a head 131, a disk portion 132, a screw shaft portion 133, and a protruding shaft portion 134 in this order from one side in the axial direction. The head 131 is a portion that is engaged with a screwing tool such as a spanner. The outer shape of the head 131 has a hexagonal diameter. The disk portion 132 has an outer diameter larger than the maximum outer diameter of the head 131. The maximum outer diameter of the screw shaft portion 133 is smaller than the outer diameter of the disc portion 132. The protruding shaft portion 134 has a columnar shape. The protruding shaft portion 134 has a diameter smaller than the minimum outer diameter of the screw shaft portion 133. The head 131, the disk portion 132, the screw shaft portion 133, and the protruding shaft portion 134 are arranged coaxially with their central axes aligned.
　第１弁構成部８１の蓋部材９２は、突出軸部１３４を先頭にして、第１弁穴２１に挿入される。その際に、ネジ軸部１３３が第１ネジ穴部３４に螺合される。このとき、円環状のワッシャ９３が円板部１３２と第１座部１５との間に介装される。この蓋部材９２は、第１弁穴２１に螺合された状態で、突出軸部１３４が第１弁構成部８１の弁体９４の軸部１１１と中心軸線をほぼ一致させた状態で軸方向に対向する。この弁体９４は、シート部１０４に当接した状態で、その軸部１１１と蓋部材９２の突出軸部１３４との間に、軸方向に所定の隙間が設けられる。弁体９４は、この隙間の範囲で軸方向に移動する。その際に、鍔部１１２の最外周面１１４が、第１主穴部３３の円筒面である内周面１３８に案内される。弁体９４は、上記範囲で移動しても、鍔部１１２が常に流入口１０６と第１流出口６１との間にある。 The lid member 92 of the first valve constituent portion 81 is inserted into the first valve hole 21 with the protruding shaft portion 134 at the head. At that time, the screw shaft portion 133 is screwed into the first screw hole portion 34. At this time, an annular washer 93 is interposed between the disk portion 132 and the first seat portion 15. The lid member 92 is axially aligned with the shaft portion 111 of the valve body 94 of the valve body 94 of the first valve constituent portion 81 in a state where the protruding shaft portion 134 is screwed into the first valve hole 21. Facing. The valve body 94 is provided with a predetermined gap in the axial direction between the shaft portion 111 and the protruding shaft portion 134 of the lid member 92 in a state of being in contact with the seat portion 104. The valve body 94 moves in the axial direction within the range of this gap. At that time, the outermost outer peripheral surface 114 of the flange portion 112 is guided to the inner peripheral surface 138 which is the cylindrical surface of the first main hole portion 33. Even if the valve body 94 moves within the above range, the flange portion 112 is always between the inflow port 106 and the first outflow port 61.
　付勢部材９５は、コイルばねである。付勢部材９５には、軸方向一端部の内側に蓋部材９２の突出軸部１３４が挿入され、軸方向他端部の内側に弁体９４の軸部１１１が挿入される。そして、付勢部材９５は、軸方向一端部が蓋部材９２のネジ軸部１３３の突出軸部１３４側の端面に当接し、軸方向他端部が弁体９４の鍔部１１２の軸部１１１が突出する側の端面に当接する。付勢部材９５は、弁体９４をシート部１０４に向けた閉弁方向に付勢する。 The urging member 95 is a coil spring. In the urging member 95, the protruding shaft portion 134 of the lid member 92 is inserted inside one end in the axial direction, and the shaft portion 111 of the valve body 94 is inserted inside the other end in the axial direction. Then, one end of the urging member 95 in the axial direction comes into contact with the end surface of the screw shaft portion 133 of the lid member 92 on the protruding shaft portion 134 side, and the other end in the axial direction is the shaft portion 111 of the flange portion 112 of the valve body 94. Abuts on the protruding side end face. The urging member 95 urges the valve body 94 toward the seat portion 104 in the valve closing direction.
　弁体９４が受ける開弁方向の差圧が所定値より小さい状態では、付勢部材９５の付勢力で弁体９４がシート部１０４に当接して流入口１０６を閉じる。弁体９４が受ける開弁方向の差圧が所定値より大きくなると、弁体９４は付勢部材９５の付勢力に抗してシート部１０４から離座して流入口１０６を開く。その際に、弁体９４は、鍔部１１２の最外周面１１４が、第１主穴部３３の内周面１３８に案内されて、軸方向に移動する。 When the differential pressure in the valve opening direction received by the valve body 94 is smaller than a predetermined value, the valve body 94 abuts on the seat portion 104 by the urging force of the urging member 95 to close the inflow port 106. When the differential pressure received by the valve body 94 in the valve opening direction becomes larger than a predetermined value, the valve body 94 separates from the seat portion 104 and opens the inflow port 106 against the urging force of the urging member 95. At that time, in the valve body 94, the outermost outer peripheral surface 114 of the flange portion 112 is guided by the inner peripheral surface 138 of the first main hole portion 33 and moves in the axial direction.
　ハウジング１２の第１主穴部３３と、蓋部材９２と、シート部材９１とで囲まれて、弁室１４１が形成されている。弁体９４は、この弁室１４１内に軸方向移動可能に設けられている。シート部材９１は、弁室１４１の底部１４２を構成している。よって、弁室１４１の底部１４２に、弁体９４が着座するシート部１０４が設けられている。シート部材９１の通路穴１０１を含む流入口１０６は、弁室１４１の底部１４２に形成されている。第１主穴部３３の内周面１３８は、弁室１４１の内周面１３８でもある。 The valve chamber 141 is formed by being surrounded by the first main hole 33 of the housing 12, the lid member 92, and the seat member 91. The valve body 94 is provided in the valve chamber 141 so as to be movable in the axial direction. The seat member 91 constitutes the bottom 142 of the valve chamber 141. Therefore, a seat portion 104 on which the valve body 94 is seated is provided on the bottom portion 142 of the valve chamber 141. The inflow port 106 including the passage hole 101 of the seat member 91 is formed in the bottom 142 of the valve chamber 141. The inner peripheral surface 138 of the first main hole portion 33 is also the inner peripheral surface 138 of the valve chamber 141.
　第１主穴部３３に開口する第１流出口６１は、第１弁機構８３の弁室１４１の内周面１３８に形成されている。同様に、第２主穴部４３に開口する第２流出口７１は、第２弁機構８４の弁室１４１の内周面１３８に形成されている。 The first outlet 61 that opens into the first main hole 33 is formed on the inner peripheral surface 138 of the valve chamber 141 of the first valve mechanism 83. Similarly, the second outlet 71 that opens into the second main hole 43 is formed on the inner peripheral surface 138 of the valve chamber 141 of the second valve mechanism 84.
　弁体９４は、弁室１４１の底部１４２側に、鍔部１１２を備えている。鍔部１１２は、シート部１０４よりも径方向外方に延出する。鍔部１１２の複数の突出部１１８は、鍔基端部１２１から弁室１４１の内周面１３８に向かって径方向外方に突出している。鍔部１１２の複数の凹部１１６は、突出部１１８の周方向反対側の位置で鍔部１１２の径方向の内方に凹んでいる。鍔部１１２は、複数の突出部１１８と、凹部１１６とを備えている。複数の突出部１１８は、鍔基端部１２１から弁室１４１の内周面１３８に向かって径方向外方に突出する。凹部１１６は、突出部１１８の周方向反対側の位置で径方向内方に凹む。 The valve body 94 is provided with a collar 112 on the bottom 142 side of the valve chamber 141. The collar portion 112 extends radially outward from the seat portion 104. The plurality of projecting portions 118 of the flange portion 112 project radially outward from the flange base end portion 121 toward the inner peripheral surface 138 of the valve chamber 141. The plurality of recesses 116 of the collar 112 are recessed inward in the radial direction of the collar 112 at positions opposite to the circumferential direction of the protrusion 118. The collar portion 112 includes a plurality of protruding portions 118 and a recessed portion 116. The plurality of projecting portions 118 project radially outward from the flange base end portion 121 toward the inner peripheral surface 138 of the valve chamber 141. The recess 116 is recessed inward in the radial direction at a position opposite to the circumferential direction of the protrusion 118.
　図４に概略的に示すように、差圧弁１１は、車両１５１の車体１５２と台車１５３との間に設けられる２つの空気ばね１５５，１５６を繋ぐ連通路１５８，１５９に配置されている。差圧弁１１は、２つの空気ばね１５５，１５６間の圧力差に応じて連通路１５８，１５９を開閉する。 As schematically shown in FIG. 4, the differential pressure valve 11 is arranged in the communication passages 158 and 159 connecting the two air springs 155 and 156 provided between the vehicle body 152 and the bogie 153 of the vehicle 151. The differential pressure valve 11 opens and closes the communication passages 158 and 159 according to the pressure difference between the two air springs 155 and 156.
　一方の空気ばね１５５と第１流入通路５３とは通路部１６１を介して連通している。他方の空気ばね１５６と第２流入通路５４とは通路部１６２を介して連通している。そして、一方の空気ばね１５５から延出する通路部１６１と、第１流入通路５３と、第１弁機構８３の流入口１０６と、第１弁機構８３の弁室１４１と、第１内部通路５１と、第２弁機構８４の流入口１０６と、第２流入通路５４と、通路部１６２とが、２つの空気ばね１５５，１５６を繋ぐ連通路１５８を構成している。また、他方の空気ばね１５６から延出する通路部１６２と、第２流入通路５４と、第２弁機構８４の流入口１０６と、第２弁機構８４の弁室１４１と、第２内部通路５２と、第１弁機構８３の流入口１０６と、第１流入通路５３と、通路部１６１とが、２つの空気ばね１５５，１５６を繋ぐ連通路１５９を構成している。 One of the air springs 155 and the first inflow passage 53 communicate with each other via the passage portion 161. The other air spring 156 and the second inflow passage 54 communicate with each other via the passage portion 162. Then, a passage portion 161 extending from one of the air springs 155, a first inflow passage 53, an inflow port 106 of the first valve mechanism 83, a valve chamber 141 of the first valve mechanism 83, and a first internal passage 51. The inflow port 106 of the second valve mechanism 84, the second inflow passage 54, and the passage portion 162 form a continuous passage 158 connecting the two air springs 155 and 156. Further, a passage portion 162 extending from the other air spring 156, a second inflow passage 54, an inflow port 106 of the second valve mechanism 84, a valve chamber 141 of the second valve mechanism 84, and a second internal passage 52. The inflow port 106 of the first valve mechanism 83, the first inflow passage 53, and the passage portion 161 form a continuous passage 159 connecting the two air springs 155 and 156.
　第１弁機構８３は、連通路１５８に配置されて、２つの空気ばね１５５，１５６間の圧力差に応じて連通路１５８を開閉する。すなわち、空気ばね１５５の圧力が空気ばね１５６の圧力より高くなると、弁体９４が付勢部材９５の付勢力に抗してシート部１０４から離座して流入口１０６を開く。すると、連通路１５８が通じて、空気ばね１５５の空気が連通路１５８、すなわち、通路部１６１、第１流入通路５３、第１弁機構８３の流入口１０６、第１弁機構８３の弁室１４１、第１流出口６１を含む第１内部通路５１、第２弁機構８４の流入口１０６、第２流入通路５４および通路部１６２を介して空気ばね１５６に流れる。これにより、空気ばね１５５の圧力が空気ばね１５６の圧力に近づくように下がる。 The first valve mechanism 83 is arranged in the communication passage 158, and opens and closes the communication passage 158 according to the pressure difference between the two air springs 155 and 156. That is, when the pressure of the air spring 155 becomes higher than the pressure of the air spring 156, the valve body 94 separates from the seat portion 104 against the urging force of the urging member 95 and opens the inflow port 106. Then, the communication passage 158 is passed, and the air of the air spring 155 is passed through the communication passage 158, that is, the passage portion 161, the first inflow passage 53, the inflow port 106 of the first valve mechanism 83, and the valve chamber 141 of the first valve mechanism 83. , The air spring 156 flows through the first internal passage 51 including the first outlet 61, the inflow port 106 of the second valve mechanism 84, the second inflow passage 54, and the passage portion 162. As a result, the pressure of the air spring 155 is lowered so as to approach the pressure of the air spring 156.
　弁室１４１の底部１４２に形成された流入口１０６には、一方の空気ばね１５５の空気が流入する。また、第１内部通路５１の第１流出口６１は、第１弁機構８３の弁室１４１の内周面１３８に形成されて他方の空気ばね１５６へ空気を流出する。 The air of one of the air springs 155 flows into the inflow port 106 formed at the bottom 142 of the valve chamber 141. Further, the first outlet 61 of the first internal passage 51 is formed on the inner peripheral surface 138 of the valve chamber 141 of the first valve mechanism 83, and air flows out to the other air spring 156.
　第１流出口６１は、流入口１０６および弁室１４１を結ぶ方向、すなわち第１弁穴２１の軸方向に対して、交差している。具体的には、第１流出口６１は、第１弁穴２１の軸方向に直交している。このため、流入口１０６から弁室１４１を介して第１流出口６１に空気が流れる際に、流入口１０６から弁室１４１に流入した空気は、主に弁体９４の鍔部１１２の凹部１１６と弁室１４１の内周面１３８との間を弁体９４の軸方向に通過した後、弁体９４の径方向に向きをかえて第１流出口６１から流出する。 The first outlet 61 intersects the direction connecting the inlet 106 and the valve chamber 141, that is, the axial direction of the first valve hole 21. Specifically, the first outlet 61 is orthogonal to the axial direction of the first valve hole 21. Therefore, when air flows from the inflow port 106 to the first outlet 61 through the valve chamber 141, the air flowing into the valve chamber 141 from the inflow port 106 is mainly the recess 116 of the flange portion 112 of the valve body 94. After passing between the valve chamber 141 and the inner peripheral surface 138 of the valve chamber 141 in the axial direction of the valve body 94, the air flows out from the first outlet 61 by changing the direction in the radial direction of the valve body 94.
　第２弁機構８４は、連通路１５９に配置されて、２つの空気ばね１５５，１５６間の圧力差に応じて連通路１５９を開閉する。すなわち、空気ばね１５６の圧力が空気ばね１５５の圧力より高くなると、弁体９４が付勢部材９５の付勢力に抗してシート部１０４から離座して流入口１０６を開く。すると、連通路１５９が通じて、空気ばね１５６の空気が連通路１５９、すなわち、通路部１６２、第２流入通路５４、第２弁機構８４の流入口１０６、第２弁機構８４の弁室１４１、第２流出口７１を含む第２内部通路５２、第１弁機構８３の流入口１０６、第１流入通路５３および通路部１６１を介して空気ばね１５５に流れる。これにより、空気ばね１５６の圧力が空気ばね１５５の圧力に近づくように下がる。 The second valve mechanism 84 is arranged in the communication passage 159 and opens and closes the communication passage 159 according to the pressure difference between the two air springs 155 and 156. That is, when the pressure of the air spring 156 becomes higher than the pressure of the air spring 155, the valve body 94 separates from the seat portion 104 against the urging force of the urging member 95 and opens the inflow port 106. Then, the communication passage 159 is passed through, and the air of the air spring 156 is passed through the communication passage 159, that is, the passage portion 162, the second inflow passage 54, the inflow port 106 of the second valve mechanism 84, and the valve chamber 141 of the second valve mechanism 84. , The second internal passage 52 including the second outlet 71, the inflow port 106 of the first valve mechanism 83, the first inflow passage 53, and the passage portion 161 flow to the air spring 155. As a result, the pressure of the air spring 156 is lowered so as to approach the pressure of the air spring 155.
　弁室１４１の底部１４２に形成された流入口１０６には、他方の空気ばね１５６の空気が流入する。また、第２内部通路５２の第２流出口７１は、第２弁機構８４の弁室１４１の内周面１３８に形成されて一方の空気ばね１５５へ空気を流出する。 The air of the other air spring 156 flows into the inflow port 106 formed at the bottom 142 of the valve chamber 141. Further, the second outlet 71 of the second internal passage 52 is formed on the inner peripheral surface 138 of the valve chamber 141 of the second valve mechanism 84, and air flows out to one of the air springs 155.
　第２流出口７１は、流入口１０６および弁室１４１を結ぶ方向、すなわち第２弁穴２２の軸方向に対して交差している。具体的には、第２流出口７１は、第２弁穴２２の軸方向に直交している。このため、流入口１０６から弁室１４１を介して第２流出口７１に空気が流れる際に、流入口１０６から弁室１４１に流入した空気は、主に弁体９４の鍔部１１２の凹部１１６と弁室１４１の内周面１３８との間を弁体９４の軸方向に通過した後、弁体９４の径方向に向きをかえて第２流出口７１から流出する。 The second outlet 71 intersects the direction connecting the inlet 106 and the valve chamber 141, that is, the axial direction of the second valve hole 22. Specifically, the second outlet 71 is orthogonal to the axial direction of the second valve hole 22. Therefore, when air flows from the inflow port 106 to the second outflow port 71 through the valve chamber 141, the air flowing into the valve chamber 141 from the inflow port 106 is mainly the recess 116 of the flange portion 112 of the valve body 94. After passing between the valve chamber 141 and the inner peripheral surface 138 of the valve chamber 141 in the axial direction of the valve body 94, the air flows out from the second outlet 71 by changing the direction in the radial direction of the valve body 94.
　上記した特許文献１には、鉄道車両において、車体と台車との間に設けられる２つの空気ばねを繋ぐ連通路に、２つの空気ばね間の圧力差に応じて連通路を開閉する差圧弁を設けることが開示されている。このような差圧弁においては、開弁圧のばらつきを抑制することが求められている。 In Patent Document 1 described above, in a railroad vehicle, a differential pressure valve that opens and closes a continuous passage according to a pressure difference between the two air springs is provided in a continuous passage connecting two air springs provided between a vehicle body and a bogie. It is disclosed to provide. In such a differential pressure valve, it is required to suppress variations in valve opening pressure.
　第１実施形態の差圧弁１１は、第１弁機構８３において、一方の空気ばね１５５の空気が流入する流入口１０６が弁室１４１の底部１４２に形成され、他方の空気ばね１５６へ空気を流出する第１流出口６１が弁室１４１の内周面１３８に形成されている。このような構造であると、流入口１０６および弁室１４１を結ぶ方向に対して、第１流出口６１が交差する。このため、流入口１０６から弁室１４１を介して第１流出口６１に空気が流れる際に、流入口１０６から弁室１４１に流入した空気は、主に弁体９４の鍔部１１２の凹部１１６と弁室１４１の内周面１３８との間を弁体９４の軸方向に通過した後、弁体９４の径方向に向きをかえて第１流出口６１から流出する。このとき、弁体９４の周方向において第１流出口６１とは反対側に凹部１１６が位置すると、この凹部１１６を通過して第１流出口６１に向く空気の流れで、弁体９４に第１流出口６１に向けて大きな径方向の力が作用する。これにより、弁体９４が、弁室１４１内において、鍔部１１２のシート部１０４とは反対側の端部をシート部１０４側の端部よりも第１流出口６１に近づけるように傾いてしまう可能性がある。 In the differential pressure valve 11 of the first embodiment, in the first valve mechanism 83, the inflow port 106 into which the air of one air spring 155 flows in is formed at the bottom 142 of the valve chamber 141, and the air flows out to the other air spring 156. The first outlet 61 is formed on the inner peripheral surface 138 of the valve chamber 141. With such a structure, the first outlet 61 intersects the direction connecting the inlet 106 and the valve chamber 141. Therefore, when air flows from the inflow port 106 to the first outlet 61 through the valve chamber 141, the air flowing into the valve chamber 141 from the inflow port 106 is mainly the recess 116 of the flange portion 112 of the valve body 94. After passing between the valve chamber 141 and the inner peripheral surface 138 of the valve chamber 141 in the axial direction of the valve body 94, the air flows out from the first outlet 61 by changing the direction in the radial direction of the valve body 94. At this time, when the recess 116 is located on the side opposite to the first outlet 61 in the circumferential direction of the valve body 94, the air flow passing through the recess 116 and facing the first outlet 61 causes the valve body 94 to become the first. A large radial force acts toward the 1st outlet 61. As a result, the valve body 94 is tilted in the valve chamber 141 so that the end portion of the flange portion 112 opposite to the seat portion 104 is closer to the first outlet 61 than the end portion on the seat portion 104 side. there is a possibility.
　これに対し、第１弁機構８３は、弁体９４の鍔部１１２の凹部１１６の周方向反対側の位置に円弧状の突出部１１８が設けられている。このため、弁体９４が上記のように傾いても、突出部１１８が弁室１４１の内周面１３８に線接触し、接触面圧が下がる。よって、弁体９４の軸方向移動が円滑となる。したがって、開弁圧のばらつきを抑制することが可能となる。すなわち、凹部１１６の周方向反対側の位置に凹部１１６が形成されていると、上記のように傾いたときに、弁体９４は、鍔部１１２の凹部１１６の周方向の両端の角部において点接触で弁室１４１の内周面１３８に接触する。すると、接触面圧が上がり、かじり等を生じて、弁体９４が円滑に軸方向移動できない可能性がある。第１弁機構８３は、このような可能性を低減できる。 On the other hand, in the first valve mechanism 83, an arcuate protruding portion 118 is provided at a position opposite to the circumferential direction of the recess 116 of the flange portion 112 of the valve body 94. Therefore, even if the valve body 94 is tilted as described above, the protruding portion 118 is in line contact with the inner peripheral surface 138 of the valve chamber 141, and the contact surface pressure is lowered. Therefore, the axial movement of the valve body 94 becomes smooth. Therefore, it is possible to suppress variations in valve opening pressure. That is, if the recess 116 is formed at a position opposite to the circumferential direction of the recess 116, the valve body 94 is formed at the corners of both ends of the recess 116 of the flange 112 in the circumferential direction when tilted as described above. It contacts the inner peripheral surface 138 of the valve chamber 141 by point contact. Then, the contact surface pressure may increase, causing galling or the like, and the valve body 94 may not be able to move smoothly in the axial direction. The first valve mechanism 83 can reduce such a possibility.
　また、弁体９４には、突出部１１８が、周方向に１２０°間隔で形成されている。このため、弁体９４の最外周面１１４の面積を広くすることができる。例えば６０°間隔とする場合と比べて約２倍にすることが可能になる。よって、弁室１４１の内周面１３８と弁体９４との接触面積を大きくできるため、弁体９４の軸方向移動が一層円滑となる。したがって、開弁圧のばらつきを一層抑制することが可能となる。また、弁体９４に、凹部１１６が周方向に１２０°間隔で形成されるため、凹部１１６の数を減らすことができ、よって、弁体９４の加工工数を低減することができる。 Further, the valve body 94 is formed with protrusions 118 at intervals of 120 ° in the circumferential direction. Therefore, the area of the outermost peripheral surface 114 of the valve body 94 can be increased. For example, it is possible to double the interval as compared with the case where the interval is 60 °. Therefore, since the contact area between the inner peripheral surface 138 of the valve chamber 141 and the valve body 94 can be increased, the axial movement of the valve body 94 becomes smoother. Therefore, it is possible to further suppress variations in valve opening pressure. Further, since the recesses 116 are formed in the valve body 94 at intervals of 120 ° in the circumferential direction, the number of recesses 116 can be reduced, and thus the man-hours for processing the valve body 94 can be reduced.
　第１弁機構８３は、以下の構造を有する。すなわち、弁体９４が、鍔部１１２よりもシート部１０４とは反対側に突出する軸部１１１を有する。この軸部１１１が付勢部材９５の一端側に挿入される。これにより、鍔部１１２に付勢部材９５の一端部を当接させる。また、蓋部材９２が、付勢部材９５側に突出軸部１３４を有する。この突出軸部１３４が付勢部材９５の他端側に挿入される。これにより、ネジ軸部１３３に付勢部材９５の他端部を当接させる。これにより、付勢部材９５を、姿勢を安定させた上で、長さを短くすることができる。したがって、付勢部材９５に座屈を生じる可能性を低減することができるとともに、付勢部材９５の伸縮を安定させることができる。加えて、付勢部材９５を短くすることで弁体９４に生じる倒れも抑制することができる。 The first valve mechanism 83 has the following structure. That is, the valve body 94 has a shaft portion 111 that protrudes from the flange portion 112 on the side opposite to the seat portion 104. The shaft portion 111 is inserted into one end side of the urging member 95. As a result, one end of the biasing member 95 is brought into contact with the flange 112. Further, the lid member 92 has a protruding shaft portion 134 on the urging member 95 side. The protruding shaft portion 134 is inserted into the other end side of the urging member 95. As a result, the other end of the urging member 95 is brought into contact with the screw shaft portion 133. As a result, the length of the urging member 95 can be shortened while stabilizing the posture. Therefore, the possibility of buckling of the urging member 95 can be reduced, and the expansion and contraction of the urging member 95 can be stabilized. In addition, by shortening the urging member 95, it is possible to suppress the tilting of the valve body 94.
　また、第１弁機構８３は、弁体９４が、鍔部１１２を一つのみ有する形状であるため、空気が通り易くなり、空気の影響を受けにくく姿勢が安定する。したがって、開弁圧のばらつきを一層抑制することが可能となる。 Further, since the valve body 94 of the first valve mechanism 83 has only one flange portion 112, air can easily pass through the valve body 94, and the posture is stable without being affected by the air. Therefore, it is possible to further suppress variations in valve opening pressure.
　第２弁機構８４も同様である。 The same applies to the second valve mechanism 84.
［第２実施形態］
　次に、第２実施形態を主に図５～図７に基づいて第１実施形態との相違部分を中心に説明する。なお、第１実施形態と共通する部位については、同一称呼、同一の符号で表す。 [Second Embodiment]
Next, the second embodiment will be described mainly based on FIGS. 5 to 7, focusing on the differences from the first embodiment. The parts common to the first embodiment are represented by the same name and the same reference numerals.
　図５に示すように、第２実施形態の差圧弁１１Ａには、第１実施形態の第１弁機構８３にかえて、第１弁機構８３Ａが設けられている。差圧弁１１Ａには、第１実施形態の第２弁機構８４にかえて、第２弁機構８４Ａが設けられている。第１弁機構８３Ａは、第１弁構成部８１Ａが第１実施形態の第１弁構成部８１とは一部異なっている。第２弁機構８４Ａは、第２弁構成部８２Ａが第１実施形態の第２弁構成部８２とは一部異なっている。第１弁構成部８１Ａおよび第２弁構成部８２Ａは同様の構成である。このため、以下、第１弁構成部８１Ａを例にとり説明する。 As shown in FIG. 5, the differential pressure valve 11A of the second embodiment is provided with the first valve mechanism 83A instead of the first valve mechanism 83 of the first embodiment. The differential pressure valve 11A is provided with a second valve mechanism 84A instead of the second valve mechanism 84 of the first embodiment. In the first valve mechanism 83A, the first valve component 81A is partially different from the first valve component 81 of the first embodiment. In the second valve mechanism 84A, the second valve component 82A is partially different from the second valve component 82 of the first embodiment. The first valve component 81A and the second valve component 82A have the same configuration. Therefore, the first valve component 81A will be described below as an example.
　第１弁構成部８１Ａは、シート部材９１と、蓋部材９２Ａと、ワッシャ９３と、弁体９４Ａと、付勢部材９５Ａと、複数枚のディスク２００とを有している。シート部材９１は、第１実施形態と同様である。蓋部材９２Ａは、第１弁穴２１の第１ネジ穴部３４に螺合される。ワッシャ９３は、第１実施形態と同様であり、蓋部材９２Ａと第１座部１５との間に介装される。弁体９４Ａは、第１主穴部３３内に移動可能に設けられる。付勢部材９５Ａは、弁体９４Ａをシート部材９１の方向に付勢する The first valve component 81A includes a seat member 91, a lid member 92A, a washer 93, a valve body 94A, an urging member 95A, and a plurality of discs 200. The seat member 91 is the same as that of the first embodiment. The lid member 92A is screwed into the first screw hole portion 34 of the first valve hole 21. The washer 93 is the same as that of the first embodiment, and is interposed between the lid member 92A and the first seat portion 15. The valve body 94A is movably provided in the first main hole portion 33. The urging member 95A urges the valve body 94A in the direction of the seat member 91.
　図６，図７に示すように、弁体９４Ａは、円形状である。具体的には、弁体９４Ａは、段付きの有底円筒状である。弁体９４Ａは、軸部１１１Ａと、鍔部１１２Ａ（第１鍔部）と、鍔部２１２（第２鍔部）と、を有している。鍔部１１２Ａ（第１鍔部）は、軸部１１１Ａの軸方向一端側から径方向外側に広がる。鍔部２１２（第２鍔部）は、軸部１１１Ａの軸方向他端側から径方向外側に広がる。軸部１１１Ａと鍔部１１２Ａ，２１２とは中心軸線を一致させた同軸状に配置されている。 As shown in FIGS. 6 and 7, the valve body 94A has a circular shape. Specifically, the valve body 94A has a stepped bottomed cylinder. The valve body 94A has a shaft portion 111A, a flange portion 112A (first flange portion), and a collar portion 212 (second flange portion). The flange portion 112A (first flange portion) extends radially outward from one end side in the axial direction of the shaft portion 111A. The flange portion 212 (second flange portion) extends radially outward from the other end side in the axial direction of the shaft portion 111A. The shaft portion 111A and the flange portions 112A and 212 are arranged coaxially with their central axes aligned.
　図５に示すように、軸部１１１Ａは、有底円筒状である。軸部１１１Ａは、円筒状の胴部２０１と、胴部２０１の一端を閉塞する底部２０２とを有している。鍔部１１２Ａは、軸部１１１Ａの底部２０２側の端部に設けられている。鍔部２１２は、軸部１１１Ａの底部２０２とは反対側の開口端部に設けられている。胴部２０１には、鍔部１１２Ａと鍔部２１２との間の位置に、貫通穴２０４が形成されている。貫通穴２０４は、胴部２０１を胴部２０１の径方向に貫通する貫通穴２０４は、胴部２０１の周方向に等間隔で複数、具体的には４箇所形成されている。 As shown in FIG. 5, the shaft portion 111A has a bottomed cylindrical shape. The shaft portion 111A has a cylindrical body portion 201 and a bottom portion 202 that closes one end of the body portion 201. The collar portion 112A is provided at the end of the shaft portion 111A on the bottom 202 side. The flange portion 212 is provided at an open end portion of the shaft portion 111A opposite to the bottom portion 202. A through hole 204 is formed in the body portion 201 at a position between the collar portion 112A and the collar portion 212. The through holes 204 are formed at a plurality of through holes 204 that penetrate the body portion 201 in the radial direction of the body portion 201 at equal intervals in the circumferential direction of the body portion 201, specifically, four locations.
　鍔部１１２Ａには、第１実施形態の鍔部１１２と同様に、複数の同形状の凹部１１６（第１凹部）が形成されている。凹部１１６（第１凹部）は、円筒面状の最外周面１１４よりも径方向内方に凹む。よって、鍔部１１２Ａには、軸部１１１Ａから径方向外方に突出する複数の同形状の突出部１１８（第１突出部）が形成されている。 Similar to the collar portion 112 of the first embodiment, the collar portion 112A is formed with a plurality of recesses 116 (first recesses) having the same shape. The recess 116 (first recess) is recessed inward in the radial direction from the outermost peripheral surface 114 having a cylindrical surface shape. Therefore, the flange portion 112A is formed with a plurality of protrusions 118 (first protrusions) having the same shape that protrude outward in the radial direction from the shaft portion 111A.
　図６，図７に示すように、鍔部２１２には、鍔部１１２Ａと同様、複数の同形状の凹部２１６（第２凹部）が形成されている。凹部２１６（第２凹部）は、円筒面状の最外周面２１４よりも径方向内方に凹む。最外周面２１４の外径は、最外周面１１４の外径と同径である。凹部２１６は凹部１１６と同形状である。凹部２１６は、鍔部２１２の周方向に等間隔で奇数箇所形成されている。具体的には、凹部２１６は、鍔部２１２の周方向に１２０°間隔で３箇所形成されている。鍔部２１２は、その周方向における凹部２１６の位置を鍔部１１２Ａの凹部１１６と合わせている。 As shown in FIGS. 6 and 7, a plurality of recesses 216 (second recesses) having the same shape are formed in the collar portion 212, similarly to the collar portion 112A. The recess 216 (second recess) is recessed inward in the radial direction from the outermost peripheral surface 214 having a cylindrical surface shape. The outer diameter of the outermost outer peripheral surface 214 is the same as the outer diameter of the outermost outer peripheral surface 114. The recess 216 has the same shape as the recess 116. The recesses 216 are formed at odd-numbered locations at equal intervals in the circumferential direction of the collar portion 212. Specifically, the recesses 216 are formed at three positions at 120 ° intervals in the circumferential direction of the collar portion 212. The flange portion 212 aligns the position of the recess 216 in the circumferential direction with the recess 116 of the collar portion 112A.
　鍔部２１２の外周部には、周方向に隣り合う凹部２１６と凹部２１６との間に、突出部２１８（第２突出部）が形成されている。突出部２１８（第２突出部）は、凹部２１６の最も凹んだ位置よりも鍔部２１２の径方向外方に突出する。鍔部２１２の突出部２１８は全て同形状である。突出部２１８は突出部１１８と同形状である。鍔部２１２は、その周方向における突出部２１８の位置を突出部１１８と合わせている。言い換えれば、突出部１１８と突出部２１８とが弁体９４Ａの周方向に一致して配置されている。鍔部２１２の周方向における突出部２１８の長さは、凹部２１６の同方向の長さよりも長くなっている。突出部２１８は、鍔部２１２の周方向に等間隔で奇数箇所形成されている。具体的には、突出部２１８は、鍔部２１２の周方向に１２０°間隔で３箇所形成されている。 On the outer peripheral portion of the flange portion 212, a protruding portion 218 (second protruding portion) is formed between the recesses 216 and the recesses 216 that are adjacent to each other in the circumferential direction. The protruding portion 218 (second protruding portion) protrudes outward in the radial direction of the flange portion 212 from the most recessed position of the recess 216. The protruding portions 218 of the flange portion 212 all have the same shape. The protrusion 218 has the same shape as the protrusion 118. The flange portion 212 aligns the position of the protruding portion 218 with the protruding portion 118 in the circumferential direction thereof. In other words, the protruding portion 118 and the protruding portion 218 are arranged so as to coincide with the circumferential direction of the valve body 94A. The length of the protrusion 218 in the circumferential direction of the collar portion 212 is longer than the length of the recess 216 in the same direction. The protruding portions 218 are formed at odd-numbered locations at equal intervals in the circumferential direction of the flange portion 212. Specifically, the protruding portions 218 are formed at three positions at 120 ° intervals in the circumferential direction of the flange portion 212.
　よって、鍔部１１２Ａと鍔部２１２とは、同形状であって、弁体９４Ａの周方向における位置（位相）を合わせている。軸部１１１Ａの貫通穴２０４は、鍔部２１２よりも鍔部１１２Ａ側に形成されている。 Therefore, the flange portion 112A and the flange portion 212 have the same shape, and the positions (phases) of the valve body 94A in the circumferential direction are matched. The through hole 204 of the shaft portion 111A is formed on the collar portion 112A side of the flange portion 212.
　図５に示すように、有底円筒状の軸部１１１Ａの外径は、シート部材９１のシート部１０４の外径よりも大径である。言い換えれば、鍔部１１２Ａの最小外径が、シート部１０４の外径よりも大径となっている。よって、鍔部１１２Ａ，２１２の最大外径、すなわち弁体９４Ａの最大外径も、シート部１０４の外径よりも大径である。
　鍔部１１２Ａ，２１２の最大外径は、第１主穴部３３の内径よりも若干小径となっている。 As shown in FIG. 5, the outer diameter of the bottomed cylindrical shaft portion 111A is larger than the outer diameter of the seat portion 104 of the seat member 91. In other words, the minimum outer diameter of the flange portion 112A is larger than the outer diameter of the seat portion 104. Therefore, the maximum outer diameter of the flange portions 112A and 212, that is, the maximum outer diameter of the valve body 94A is also larger than the outer diameter of the seat portion 104.
The maximum outer diameters of the flange portions 112A and 212 are slightly smaller than the inner diameter of the first main hole portion 33.
　弁体９４Ａは、鍔部１１２Ａがシート部１０４側となり、鍔部２１２がシート部１０４とは反対側となる向きで、第１主穴部３３内に挿入される。この状態で、弁体９４Ａは、軸部１１１Ａの底部２０２においてシート部１０４に着座可能となる。弁体９４Ａは、底部２０２の胴部２０１とは反対側に第１実施形態と同様の着座体１２３を有している。弁体９４Ａも、シート部１０４に着座する部分がこの着座体１２３で構成されている。弁体９４Ａは、着座体１２３以外の部分が、着座体１２３とは材質が異なる、例えば金属製の弁本体１２４Ａとなっている。弁本体１２４Ａは、軸部１１１Ａの着座体１２３を除く全部と、鍔部１１２Ａと、鍔部２１２とを構成しており、一体成形されている。 The valve body 94A is inserted into the first main hole portion 33 with the flange portion 112A on the seat portion 104 side and the collar portion 212 on the side opposite to the seat portion 104. In this state, the valve body 94A can be seated on the seat portion 104 at the bottom portion 202 of the shaft portion 111A. The valve body 94A has a seating body 123 similar to that of the first embodiment on the side of the bottom portion 202 opposite to the body portion 201. The portion of the valve body 94A that is seated on the seat portion 104 is also composed of the seated body 123. The portion of the valve body 94A other than the seating body 123 is a metal valve body 124A whose material is different from that of the seating body 123, for example. The valve body 124A comprises the entire shaft portion 111A except the seating body 123, the collar portion 112A, and the collar portion 212, and is integrally molded.
　図６に示すように、鍔部２１２に凹部２１６および突出部２１８がそれぞれ奇数箇所形成されている。このため、全ての突出部２１８に対して、それぞれの鍔部２１２の周方向における１８０度反対側の位置に凹部２１６が設けられている。言い換えれば、鍔部２１２も、軸部１１１Ａから径方向外方に突出する複数の突出部２１８と、これら複数の突出部２１８のそれぞれの、鍔部２１２の周方向における反対側の位置で径方向内方に凹む凹部２１６とを備えている。 As shown in FIG. 6, the flange portion 212 is formed with an odd number of recesses 216 and protrusions 218, respectively. For this reason, recesses 216 are provided at positions 180 degrees opposite to all the protruding portions 218 in the circumferential direction of the respective flange portions 212. In other words, the flange portion 212 also has a plurality of projecting portions 218 projecting radially outward from the shaft portion 111A and the positions of each of the plurality of projecting portions 218 on opposite sides in the circumferential direction of the flange portion 212 in the radial direction. It is provided with a recess 216 that is recessed inward.
　図５に示すように、蓋部材９２Ａは、第１実施形態と同様の頭部１３１および円板部１３２を有しており、円板部１３２の頭部１３１とは反対側にネジ軸部１３３Ａを有している。ネジ軸部１３３Ａは、最大外径が円板部１３２の外径よりも小径である。頭部１３１と円板部１３２とネジ軸部１３３Ａとは中心軸線を一致させた同軸状に配置されている。 As shown in FIG. 5, the lid member 92A has the same head 131 and disc portion 132 as in the first embodiment, and the screw shaft portion 133A is on the side of the disc portion 132 opposite to the head 131. have. The maximum outer diameter of the screw shaft portion 133A is smaller than the outer diameter of the disc portion 132. The head 131, the disk portion 132, and the screw shaft portion 133A are arranged coaxially with their central axes aligned.
　ネジ軸部１３３Ａには、径方向の中央に収容穴２０６が形成されている。収容穴２０６は、ネジ軸部１３３Ａに、軸方向の頭部１３１とは反対側から穿設されている。蓋部材９２Ａは、ネジ軸部１３３Ａを先頭にして、第１弁穴２１に挿入される。その際に、ネジ軸部１３３Ａが第１ネジ穴部３４に螺合される。このとき、ワッシャ９３が円板部１３２と第１座部１５との間に介装される。第１弁機構８３Ａにおいて、蓋部材９２Ａは、第１弁穴２１に螺合された状態で、収容穴２０６が弁体９４Ａと中心軸線をほぼ一致させた状態で鍔部２１２と軸方向に対向する。弁体９４Ａは、シート部１０４に当接した状態で、蓋部材９２Ａとの間に、軸方向に所定の隙間が設けられる。弁体９４Ａは、この隙間の範囲で軸方向に移動する。その際に、弁体９４Ａは、鍔部１１２Ａ，２１２の最外周面１１４，２１４が、第１主穴部３３の内周面１３８に案内される。弁体９４Ａは、上記範囲で移動しても、鍔部１１２Ａが常に流入口１０６と第１流出口６１との間にある。 A housing hole 206 is formed in the center of the screw shaft portion 133A in the radial direction. The accommodating hole 206 is bored in the screw shaft portion 133A from the side opposite to the head 131 in the axial direction. The lid member 92A is inserted into the first valve hole 21 with the screw shaft portion 133A at the head. At that time, the screw shaft portion 133A is screwed into the first screw hole portion 34. At this time, the washer 93 is interposed between the disk portion 132 and the first seat portion 15. In the first valve mechanism 83A, the lid member 92A faces the flange portion 212 in the axial direction in a state where the lid member 92A is screwed into the first valve hole 21 and the accommodating hole 206 substantially coincides with the valve body 94A and the central axis. To do. The valve body 94A is provided with a predetermined gap in the axial direction from the lid member 92A in a state of being in contact with the seat portion 104. The valve body 94A moves in the axial direction within this gap. At that time, in the valve body 94A, the outermost outer peripheral surfaces 114 and 214 of the flange portions 112A and 212 are guided to the inner peripheral surface 138 of the first main hole portion 33. Even if the valve body 94A moves within the above range, the flange portion 112A is always between the inflow port 106 and the first outflow port 61.
　付勢部材９５Ａは、コイルばねである。付勢部材９５Ａは、軸方向一端部が蓋部材９２Ａの収容穴２０６内に挿入され、軸方向他端部が弁体９４Ａの胴部２０１内に挿入される。そして、付勢部材９５Ａは、軸方向一端部が複数枚のディスク２００を介して蓋部材９２Ａの収容穴２０６の底部に突き当たり、軸方向他端部が弁体９４Ａの底部２０２に当接する。よって、付勢部材９５Ａは、第１実施形態の付勢部材９５よりも軸方向に長い。付勢部材９５Ａは、弁体９４Ａをシート部１０４に向けた閉弁方向に付勢する。 The urging member 95A is a coil spring. One end of the urging member 95A in the axial direction is inserted into the accommodating hole 206 of the lid member 92A, and the other end in the axial direction is inserted into the body 201 of the valve body 94A. Then, one end of the urging member 95A abuts against the bottom of the accommodating hole 206 of the lid member 92A via a plurality of discs 200, and the other end of the axial direction abuts on the bottom 202 of the valve body 94A. Therefore, the urging member 95A is longer in the axial direction than the urging member 95 of the first embodiment. The urging member 95A urges the valve body 94A in the valve closing direction toward the seat portion 104.
　よって、弁体９４Ａが受ける開弁方向の差圧が所定値より小さい状態では、付勢部材９５Ａの付勢力で弁体９４Ａがシート部１０４に当接して流入口１０６を閉じる。また、弁体９４Ａが受ける開弁方向の差圧が所定値より大きくなると、弁体９４Ａは付勢部材９５Ａの付勢力に抗してシート部１０４から離座して流入口１０６を開く。その際に、弁体９４Ａは、鍔部１１２Ａ，２１２の最外周面１１４，２１４が、第１主穴部３３の内周面１３８に案内されて、軸方向に移動する。 Therefore, when the differential pressure in the valve opening direction received by the valve body 94A is smaller than the predetermined value, the valve body 94A abuts on the seat portion 104 by the urging force of the urging member 95A and closes the inflow port 106. Further, when the differential pressure received by the valve body 94A in the valve opening direction becomes larger than a predetermined value, the valve body 94A separates from the seat portion 104 and opens the inflow port 106 against the urging force of the urging member 95A. At that time, in the valve body 94A, the outermost outer peripheral surfaces 114 and 214 of the flange portions 112A and 212 are guided by the inner peripheral surface 138 of the first main hole portion 33 and move in the axial direction.
　ハウジング１２の第１主穴部３３と、蓋部材９２Ａと、シート部材９１とで囲まれて、弁室１４１Ａが形成されている。弁体９４Ａは、この弁室１４１Ａ内に軸方向移動可能に設けられている。シート部材９１は、弁室１４１Ａの底部１４２を構成している。第１弁室１４１Ａの底部１４２に、弁体９４Ａが着座するシート部１０４が設けられている。シート部材９１の通路穴１０１を含む流入口１０６は、弁室１４１Ａの底部１４２に形成されている。第１主穴部３３の内周面１３８は、弁室１４１Ａの内周面１３８でもある。 The valve chamber 141A is formed by being surrounded by the first main hole 33 of the housing 12, the lid member 92A, and the seat member 91. The valve body 94A is provided in the valve chamber 141A so as to be movable in the axial direction. The seat member 91 constitutes the bottom 142 of the valve chamber 141A. A seat portion 104 on which the valve body 94A is seated is provided on the bottom portion 142 of the first valve chamber 141A. The inflow port 106 including the passage hole 101 of the seat member 91 is formed in the bottom portion 142 of the valve chamber 141A. The inner peripheral surface 138 of the first main hole portion 33 is also the inner peripheral surface 138 of the valve chamber 141A.
　この第１主穴部３３に開口する第１流出口６１は、第１弁機構８３Ａの弁室１４１Ａの内周面１３８に形成されている。同様に、第２主穴部４３に開口する第２流出口７１は、第２弁機構８４Ａの弁室１４１Ａの内周面１３８に形成されている。 The first outlet 61 that opens into the first main hole 33 is formed on the inner peripheral surface 138 of the valve chamber 141A of the first valve mechanism 83A. Similarly, the second outlet 71 that opens into the second main hole 43 is formed on the inner peripheral surface 138 of the valve chamber 141A of the second valve mechanism 84A.
　弁体９４Ａは、弁室１４１Ａの底部１４２側に、鍔部１１２Ａを備えている。鍔部１１２Ａは、シート部１０４よりも径方向外方に延出する。鍔部１１２Ａの複数の突出部１１８は、軸部１１１Ａから弁室１４１Ａの内周面１３８に向かって径方向外方に突出している。鍔部１１２Ａの複数の凹部１１６は、突出部１１８の周方向反対側の位置で鍔部１１２Ａの径方向における内方に凹んでいる。 The valve body 94A is provided with a collar portion 112A on the bottom 142 side of the valve chamber 141A. The collar portion 112A extends outward in the radial direction from the seat portion 104. The plurality of projecting portions 118 of the flange portion 112A project radially outward from the shaft portion 111A toward the inner peripheral surface 138 of the valve chamber 141A. The plurality of recesses 116 of the collar 112A are recessed inward in the radial direction of the collar 112A at positions opposite to the circumferential direction of the protrusion 118.
　弁体９４Ａは、底部１４２とは反対側に、鍔部２１２を備えている。鍔部２１２は、軸部１１１Ａから弁室１４１Ａの内周面１３８に向かって径方向外方に延出する。鍔部２１２の複数の突出部２１８は、軸部１１１Ａから弁室１４１Ａの内周面１３８に向かって径方向外方に突出している。鍔部２１２の複数の凹部２１６は、突出部２１８の周方向反対側の位置で鍔部２１２の径方向における内方に凹んでいる。 The valve body 94A is provided with a collar portion 212 on the side opposite to the bottom portion 142. The flange portion 212 extends radially outward from the shaft portion 111A toward the inner peripheral surface 138 of the valve chamber 141A. The plurality of projecting portions 218 of the flange portion 212 project radially outward from the shaft portion 111A toward the inner peripheral surface 138 of the valve chamber 141A. The plurality of recesses 216 of the collar portion 212 are recessed inward in the radial direction of the collar portion 212 at positions opposite to the circumferential direction of the protrusion 218.
　第１弁機構８３Ａにおいて、流入口１０６および弁室１４１Ａを結ぶ方向に対して、第１流出口６１が交差、具体的には直交している。このため、流入口１０６から弁室１４１Ａを介して第１流出口６１に空気が流れる際に、流入口１０６から弁室１４１Ａに流入した空気は、主に弁体９４Ａの鍔部１１２Ａの凹部１１６と弁室１４１Ａの内周面１３８との間を弁体９４Ａの軸方向に通過した後、弁体９４Ａの径方向に向きをかえて第１流出口６１から流出する。 In the first valve mechanism 83A, the first outlet 61 intersects, specifically, is orthogonal to the direction connecting the inflow port 106 and the valve chamber 141A. Therefore, when air flows from the inflow port 106 to the first outlet 61 via the valve chamber 141A, the air flowing into the valve chamber 141A from the inflow port 106 is mainly the recess 116 of the flange portion 112A of the valve body 94A. After passing between the valve chamber 141A and the inner peripheral surface 138 of the valve chamber 141A in the axial direction of the valve body 94A, the air flows out from the first outlet 61 by changing the direction in the radial direction of the valve body 94A.
　第２弁機構８４Ａにおいて、流入口１０６および弁室１４１Ａを結ぶ方向に対して、第２流出口７１が交差、具体的には直交している。このため、流入口１０６から弁室１４１Ａを介して第２流出口７１に空気が流れる際に、流入口１０６から弁室１４１Ａに流入した空気は、主に弁体９４Ａの鍔部１１２Ａの凹部１１６と弁室１４１Ａの内周面１３８との間を弁体９４Ａの軸方向に通過した後、弁体９４Ａの径方向に向きをかえて第２流出口７１から流出する。 In the second valve mechanism 84A, the second outlet 71 intersects, specifically, is orthogonal to the direction connecting the inflow port 106 and the valve chamber 141A. Therefore, when air flows from the inflow port 106 to the second outflow port 71 through the valve chamber 141A, the air flowing into the valve chamber 141A from the inflow port 106 is mainly the recess 116 of the flange portion 112A of the valve body 94A. After passing between the valve chamber 141A and the inner peripheral surface 138 of the valve chamber 141A in the axial direction of the valve body 94A, the air flows out from the second outlet 71 by changing the direction in the radial direction of the valve body 94A.
　差圧弁１１Ａにおいても、第１実施形態の弁室１４１と同様に、第１弁機構８３Ａの弁室１４１Ａが、空気ばね１５５，１５６を連通する連通路１５８を構成している。第２弁機構８４Ａの弁室１４１Ａが、空気ばね１５５，１５６を連通する連通路１５９を構成している。 In the differential pressure valve 11A as well, the valve chamber 141A of the first valve mechanism 83A constitutes a communication passage 158 communicating the air springs 155 and 156, similarly to the valve chamber 141 of the first embodiment. The valve chamber 141A of the second valve mechanism 84A constitutes a communication passage 159 that communicates the air springs 155 and 156.
　第２実施形態の差圧弁１１Ａは、第１弁機構８３Ａにおいて、一方の空気ばね１５５の空気が流入する流入口１０６が弁室１４１Ａの底部１４２に形成され、他方の空気ばね１５６へ空気を流出する第１流出口６１が弁室１４１Ａの内周面１３８に形成されている。
　このような構造であると、流入口１０６および弁室１４１Ａを結ぶ方向に対して、第１流出口６１が交差する。このため、第１弁機構８３Ａにおいて、流入口１０６から弁室１４１Ａを介して第１流出口６１に空気が流れる際に、流入口１０６から弁室１４１Ａに流入した空気は、主に弁体９４Ａの鍔部１１２Ａの凹部１１６と弁室１４１Ａの内周面１３８との間を弁体９４Ａの軸方向に通過した後、弁体９４Ａの径方向に向きをかえて第１流出口６１から流出する。このとき、弁体９４Ａの周方向において第１流出口６１とは反対側に凹部１１６が位置すると、この凹部１１６を通過して第１流出口６１に向く空気の流れで、弁体９４Ａに第１流出口６１に向けて大きな径方向の力が作用する。これにより、弁体９４Ａが、弁室１４１Ａ内において、シート部１０４とは反対側の鍔部２１２をシート部１０４側の鍔部１１２Ｂよりも第１流出口６１に近づけるように傾いてしまう可能性がある。 In the differential pressure valve 11A of the second embodiment, in the first valve mechanism 83A, the inflow port 106 into which the air of one air spring 155 flows in is formed at the bottom 142 of the valve chamber 141A, and the air flows out to the other air spring 156. The first outlet 61 is formed on the inner peripheral surface 138 of the valve chamber 141A.
With such a structure, the first outlet 61 intersects the direction connecting the inlet 106 and the valve chamber 141A. Therefore, in the first valve mechanism 83A, when air flows from the inflow port 106 to the first outflow port 61 through the valve chamber 141A, the air flowing into the valve chamber 141A from the inflow port 106 is mainly the valve body 94A. After passing between the recess 116 of the flange portion 112A and the inner peripheral surface 138 of the valve chamber 141A in the axial direction of the valve body 94A, the air flows out from the first outlet 61 by turning in the radial direction of the valve body 94A. .. At this time, if the recess 116 is located on the side opposite to the first outlet 61 in the circumferential direction of the valve body 94A, the air flow passing through the recess 116 toward the first outlet 61 causes the valve body 94A to reach the first position. A large radial force acts toward the 1st outlet 61. As a result, the valve body 94A may tilt in the valve chamber 141A so that the flange portion 212 on the side opposite to the seat portion 104 is closer to the first outlet 61 than the collar portion 112B on the seat portion 104 side. There is.
　これに対し、第１弁機構８３Ａは、弁体９４Ａの鍔部１１２Ａの凹部１１６，２１６の周方向反対側の位置に円弧状の突出部１１８，２１８が設けられている。このため、弁体９４Ａが上記のように傾いても、突出部２１８が弁室１４１Ａの内周面１３８に線接触し、接触面圧が下がる。よって、弁体９４Ａの軸方向移動が円滑となる。したがって、開弁圧のばらつきを抑制することが可能となる。 On the other hand, the first valve mechanism 83A is provided with arc-shaped protrusions 118 and 218 at positions opposite to the circumferential directions of the recesses 116 and 216 of the flange 112A of the valve body 94A. Therefore, even if the valve body 94A is tilted as described above, the protruding portion 218 is in line contact with the inner peripheral surface 138 of the valve chamber 141A, and the contact surface pressure is lowered. Therefore, the axial movement of the valve body 94A becomes smooth. Therefore, it is possible to suppress variations in valve opening pressure.
　また、第１弁機構８３Ａは、突出部１１８に加えて、突出部２１８も、周方向に１２０°間隔で弁体９４Ａに形成されている。このため、弁体９４Ａの最外周面２１４の面積を広くすることができる。よって、弁室１４１Ａの内周面１３８と弁体９４Ａとの接触面積を大きくできるため、弁体９４Ａの軸方向移動が一層円滑となる。したがって、開弁圧のばらつきを一層抑制することが可能となる。また、弁体９４Ａに、凹部２１６が周方向に１２０°間隔で形成されているため、凹部２１６の数を減らすことができる。よって、弁体９４Ａの加工工数を低減することができる。 Further, in the first valve mechanism 83A, in addition to the protruding portion 118, the protruding portion 218 is also formed on the valve body 94A at intervals of 120 ° in the circumferential direction. Therefore, the area of the outermost peripheral surface 214 of the valve body 94A can be increased. Therefore, the contact area between the inner peripheral surface 138 of the valve chamber 141A and the valve body 94A can be increased, so that the axial movement of the valve body 94A becomes smoother. Therefore, it is possible to further suppress variations in valve opening pressure. Further, since the recesses 216 are formed in the valve body 94A at intervals of 120 ° in the circumferential direction, the number of recesses 216 can be reduced. Therefore, the man-hours for processing the valve body 94A can be reduced.
　また、突出部１１８と突出部２１８とが弁体９４Ａの周方向に一致して配置されているため、弁体９４Ａの加工工数を低減することができるとともに、弁体９４Ａの周囲での空気の流れを円滑にすることができる。 Further, since the protruding portion 118 and the protruding portion 218 are arranged so as to coincide with the circumferential direction of the valve body 94A, the man-hours for processing the valve body 94A can be reduced, and the air around the valve body 94A can be reduced. The flow can be smoothed.
　第２弁機構８４Ａも同様である。 The same applies to the second valve mechanism 84A.
［第３実施形態］
　次に、第３実施形態を主に図８～図１０に基づいて第２実施形態との相違部分を中心に説明する。なお、第２実施形態と共通する部位については、同一称呼、同一の符号で表す。 [Third Embodiment]
Next, the third embodiment will be described mainly based on FIGS. 8 to 10 with a focus on differences from the second embodiment. The parts common to the second embodiment are represented by the same name and the same reference numerals.
　第３実施形態の差圧弁１１Ｂには、図８に示すように、第２実施形態の第１弁機構８３Ａにかえて、第１弁機構８３Ｂが設けられている。差圧弁１１Ｂには、第２実施形態の第２弁機構８４Ａにかえて、第２弁機構８４Ｂが設けられている。第１弁機構８３Ｂは、第１弁構成部８１Ｂが第２実施形態の第１弁構成部８１Ａとは一部異なっている。第２弁機構８４Ｂは、第２弁構成部８２Ｂが第２実施形態の第２弁構成部８２Ａとは一部異なっている。ここで、第１弁構成部８１Ｂおよび第２弁構成部８２Ｂは同様の構成である。このため、これらのうちの第１弁構成部８１Ｂを例にとり説明する。 As shown in FIG. 8, the differential pressure valve 11B of the third embodiment is provided with the first valve mechanism 83B instead of the first valve mechanism 83A of the second embodiment. The differential pressure valve 11B is provided with a second valve mechanism 84B instead of the second valve mechanism 84A of the second embodiment. In the first valve mechanism 83B, the first valve component 81B is partially different from the first valve component 81A of the second embodiment. In the second valve mechanism 84B, the second valve component 82B is partially different from the second valve component 82A of the second embodiment. Here, the first valve component 81B and the second valve component 82B have the same configuration. Therefore, the first valve component 81B among these will be described as an example.
　第１弁構成部８１Ｂは、弁体９４Ｂを有している。弁体９４Ｂは、第２実施形態の弁体９４Ａとは一部異なる。図９，図１０に示すように、弁体９４Ｂは、軸部１１１Ａと、鍔部１１２Ｂ（第１鍔部）と、鍔部２１２Ｂ（第２鍔部）と、を有している。軸部１１１Ａは、第２実施形態と同様である。鍔部１１２Ｂ（第１鍔部）は、軸部１１１Ａの軸方向一端側から径方向外側に広がる。鍔部２１２Ｂ（第２鍔部）は、軸部１１１Ａの軸方向他端側から径方向外側に広がる。軸部１１１Ａと鍔部１１２Ｂ，２１２Ｂとは中心軸線を一致させた同軸状に配置されている。図８に示すように、鍔部１１２Ｂは、軸部１１１Ａの底部２０２側に設けられている。鍔部２１２Ｂは、軸部１１１Ａの底部２０２とは反対側に設けられている。 The first valve component 81B has a valve body 94B. The valve body 94B is partially different from the valve body 94A of the second embodiment. As shown in FIGS. 9 and 10, the valve body 94B has a shaft portion 111A, a collar portion 112B (first collar portion), and a collar portion 212B (second collar portion). The shaft portion 111A is the same as that of the second embodiment. The flange portion 112B (first flange portion) extends radially outward from one end side in the axial direction of the shaft portion 111A. The flange portion 212B (second flange portion) extends radially outward from the other end side in the axial direction of the shaft portion 111A. The shaft portion 111A and the flange portions 112B and 212B are arranged coaxially with their central axes aligned. As shown in FIG. 8, the collar portion 112B is provided on the bottom portion 202 side of the shaft portion 111A. The collar portion 212B is provided on the side of the shaft portion 111A opposite to the bottom portion 202.
　鍔部１１２Ｂには、複数の同形状の凹部１１６Ｂ（第１凹部）が形成されている。凹部１１６Ｂ（第１凹部）は、円筒面状の最外周面１１４Ｂよりも径方向内方に凹む。凹部１１６Ｂは、鍔部１１２Ｂの周方向に等間隔で偶数箇所形成されている。具体的には、凹部１１６Ｂは、鍔部１１２Ｂの周方向に６０°間隔で６箇所形成されている。 A plurality of recesses 116B (first recesses) having the same shape are formed in the collar portion 112B. The recess 116B (first recess) is recessed inward in the radial direction from the outermost peripheral surface 114B having a cylindrical surface. The recesses 116B are formed at even-numbered positions at equal intervals in the circumferential direction of the flange portion 112B. Specifically, the recesses 116B are formed at six positions at intervals of 60 ° in the circumferential direction of the collar portion 112B.
　これにより、鍔部１１２Ｂの外周部には、周方向に隣り合う凹部１１６Ｂと凹部１１６Ｂとの間に、突出部１１８Ｂ（第１突出部）が形成されている。突出部１１８Ｂは、凹部１１６Ｂの最も凹んだ位置よりも鍔部１１２Ｂの径方向外方に突出する。鍔部１１２Ｂの突出部１１８Ｂは全て同形状である。鍔部１１２Ｂの周方向における突出部１１８Ｂの長さは、凹部１１６Ｂの同方向の長さよりも短くなっている。突出部１１８Ｂは、鍔部１１２Ｂの周方向に等間隔で偶数箇所形成されている。具体的には、突出部１１８Ｂは、鍔部１１２Ｂの周方向に６０°間隔で６箇所形成されている。 As a result, a protruding portion 118B (first protruding portion) is formed on the outer peripheral portion of the flange portion 112B between the recesses 116B and the recesses 116B that are adjacent to each other in the circumferential direction. The protruding portion 118B protrudes outward in the radial direction of the flange portion 112B from the most recessed position of the recess 116B. The protruding portions 118B of the flange portion 112B all have the same shape. The length of the protruding portion 118B in the circumferential direction of the flange portion 112B is shorter than the length of the recess 116B in the same direction. The protruding portions 118B are formed at even-numbered locations at equal intervals in the circumferential direction of the flange portion 112B. Specifically, the protruding portions 118B are formed at six locations at intervals of 60 ° in the circumferential direction of the flange portion 112B.
　鍔部２１２Ｂには、複数の同形状の凹部２１６Ｂ（第２凹部）が形成されている。凹部２１６Ｂ（第２凹部）は、円筒面状の最外周面２１４Ｂよりも径方向内方に凹む。最外周面２１４Ｂの外径は、最外周面１１４Ｂの外径と同径となっている。凹部２１６Ｂは、凹部１１６Ｂと同形状である。凹部２１６Ｂは、鍔部２１２Ｂの周方向に等間隔で偶数箇所形成されている。具体的には、凹部２１６Ｂは、鍔部２１２Ｂの周方向に６０°間隔で６箇所形成されている。鍔部２１２Ｂは、その周方向における凹部２１６Ｂの位置を、鍔部１１２Ｂの突出部１１８Ｂと合わせている。 A plurality of recesses 216B (second recesses) having the same shape are formed in the collar portion 212B. The recess 216B (second recess) is recessed inward in the radial direction with respect to the outermost peripheral surface 214B having a cylindrical surface shape. The outer diameter of the outermost outer peripheral surface 214B is the same as the outer diameter of the outermost outer peripheral surface 114B. The recess 216B has the same shape as the recess 116B. The recesses 216B are formed at even-numbered positions at equal intervals in the circumferential direction of the collar portion 212B. Specifically, the recesses 216B are formed at six positions at intervals of 60 ° in the circumferential direction of the collar portion 212B. The flange portion 212B aligns the position of the recess 216B in the circumferential direction with the protruding portion 118B of the collar portion 112B.
　鍔部２１２Ｂの外周部には、周方向に隣り合う凹部２１６Ｂと凹部２１６Ｂとの間に、突出部２１８Ｂ（第２突出部）が形成されている。突出部２１８Ｂ（第２突出部）は、凹部２１６Ｂの最も凹んだ位置よりも鍔部２１２Ｂの径方向における外方に突出する。鍔部２１２Ｂの突出部２１８Ｂは全て同形状である。突出部２１８Ｂは、突出部１１８Ｂと同形状である。鍔部２１２Ｂは、その周方向における突出部２１８Ｂの位置を、鍔部１１２Ｂの凹部１１６Ｂと合わせている。鍔部２１２Ｂの周方向における突出部２１８Ｂの長さは、凹部２１６Ｂの同方向の長さよりも短くなっている。突出部２１８Ｂは、鍔部２１２Ｂの周方向に等間隔で偶数箇所形成されている。具体的には、突出部２１８Ｂは、鍔部２１２Ｂの周方向に６０°間隔で６箇所形成されている。 A protruding portion 218B (second protruding portion) is formed on the outer peripheral portion of the flange portion 212B between the recesses 216B and the recesses 216B that are adjacent to each other in the circumferential direction. The protruding portion 218B (second protruding portion) protrudes outward in the radial direction of the flange portion 212B from the most recessed position of the recess 216B. The protruding portions 218B of the flange portion 212B all have the same shape. The protrusion 218B has the same shape as the protrusion 118B. The flange portion 212B aligns the position of the protrusion 218B in the circumferential direction with the recess 116B of the collar portion 112B. The length of the protruding portion 218B in the circumferential direction of the flange portion 212B is shorter than the length of the concave portion 216B in the same direction. The protruding portions 218B are formed at even-numbered locations at equal intervals in the circumferential direction of the flange portion 212B. Specifically, the protruding portions 218B are formed at six locations at intervals of 60 ° in the circumferential direction of the flange portion 212B.
　よって、鍔部１１２Ｂと鍔部２１２Ｂとは、同様の形状であり、弁体９４Ｂの周方向において突出部１１８Ｂおよび突出部２１８Ｂの位置（位相）をずらしている。言い換えれば、突出部１１８Ｂと突出部２１８Ｂとが弁体９４Ｂの周方向にずれて配置されている。
　鍔部１１２Ｂ，２１２Ｂの最大外径は、第１主穴部３３の内径よりも若干小径となっている。 Therefore, the flange portion 112B and the flange portion 212B have the same shape, and the positions (phases) of the protrusion 118B and the protrusion 218B are shifted in the circumferential direction of the valve body 94B. In other words, the protruding portion 118B and the protruding portion 218B are arranged so as to be offset in the circumferential direction of the valve body 94B.
The maximum outer diameters of the flange portions 112B and 212B are slightly smaller than the inner diameter of the first main hole portion 33.
　図８に示すように、弁体９４Ｂは、鍔部１１２Ｂがシート部１０４側となり、鍔部２１２Ｂがシート部１０４とは反対側となる向きで、第１主穴部３３内に挿入される。この状態で、弁体９４Ｂは、軸部１１１Ａの底部２０２に設けられた着座体１２３においてシート部１０４に着座可能となる。弁体９４Ｂは、着座体１２３以外の部分が、着座体１２３とは材質が異なる、例えば金属製の弁本体１２４Ｂとなっている。弁本体１２４Ｂは、軸部１１１Ａの着座体１２３を除く全部と、鍔部１１２Ｂと、鍔部２１２Ｂとを構成しており、一体成形されている。 As shown in FIG. 8, the valve body 94B is inserted into the first main hole portion 33 with the flange portion 112B on the seat portion 104 side and the collar portion 212B on the side opposite to the seat portion 104. In this state, the valve body 94B can be seated on the seat portion 104 at the seating body 123 provided on the bottom portion 202 of the shaft portion 111A. The portion of the valve body 94B other than the seating body 123 is a metal valve body 124B whose material is different from that of the seating body 123, for example. The valve body 124B comprises the entire shaft portion 111A except the seating body 123, the collar portion 112B, and the collar portion 212B, and is integrally molded.
　ここで、図９，図１０に示すように、鍔部１１２Ｂに凹部１１６Ｂおよび突出部１１８Ｂがそれぞれ偶数形成されており、鍔部２１２Ｂに凹部２１６Ｂおよび突出部２１８Ｂがそれぞれ偶数形成されている。このことから、鍔部１１２Ｂの全ての突出部１１８Ｂに対して、それぞれの弁体９４Ｂの周方向における１８０度反対側の位置に突出部１１８Ｂが設けられている。また、鍔部１１２Ｂの全ての凹部１１６Ｂに対して、それぞれの弁体９４Ｂの周方向における１８０度反対側の位置に凹部１１６Ｂが設けられている。また、鍔部２１２Ｂの全ての突出部２１８Ｂに対して、それぞれの弁体９４Ｂの周方向における１８０度反対側の位置に突出部２１８Ｂが設けられている。また、鍔部２１２Ｂの全ての凹部２１６Ｂに対して、それぞれの弁体９４Ｂの周方向における１８０度反対側の位置に凹部２１６Ｂが設けられている。 Here, as shown in FIGS. 9 and 10, the flange portion 112B is formed with an even number of recesses 116B and protrusions 118B, and the collar portion 212B is formed with an even number of recesses 216B and protrusions 218B, respectively. For this reason, the protrusions 118B are provided at positions 180 degrees opposite to all the protrusions 118B of the flange 112B in the circumferential direction of the respective valve bodies 94B. Further, the recesses 116B are provided at positions 180 degrees opposite to all the recesses 116B of the flange portion 112B in the circumferential direction of the respective valve bodies 94B. Further, the protruding portions 218B are provided at positions 180 degrees opposite to all the protruding portions 218B of the flange portion 212B in the circumferential direction of the respective valve bodies 94B. Further, the recesses 216B are provided at positions 180 degrees opposite to all the recesses 216B of the flange portion 212B in the circumferential direction of the respective valve bodies 94B.
　そして、鍔部１１２Ｂの凹部１１６Ｂと鍔部２１２Ｂの突出部２１８Ｂとが位相を合わせ、鍔部１１２Ｂの突出部１１８Ｂと鍔部２１２Ｂの凹部２１６Ｂとが位相を合わせている。このことから、鍔部１１２Ｂの全ての突出部１１８Ｂに対して、それぞれの弁体９４Ｂの周方向における１８０度反対側の位置に鍔部２１２Ｂの凹部２１６Ｂが設けられている。また、鍔部２１２Ｂの全ての突出部２１８Ｂに対して、それぞれの弁体９４Ｂの周方向における１８０度反対側の位置に鍔部１１２Ｂの凹部１１６Ｂが設けられている。言い換えれば、鍔部１１２Ｂは、径方向外方に突出する複数の突出部１１８Ｂを有している。鍔部２１２Ｂは、これら複数の突出部１１８Ｂのそれぞれの、弁体９４Ｂの周方向における反対側の位置で径方向内方に凹む凹部２１６Ｂを有している。また、鍔部２１２Ｂは、径方向外方に突出する複数の突出部２１８Ｂを有している。鍔部１１２Ｂは、これら複数の突出部２１８Ｂのそれぞれの、弁体９４Ｂの周方向における反対側の位置で径方向内方に凹む凹部１１６Ｂを有している。 Then, the recess 116B of the collar 112B and the protrusion 218B of the collar 212B are in phase with each other, and the protrusion 118B of the collar 112B and the recess 216B of the collar 212B are in phase. For this reason, recesses 216B of the flange portion 212B are provided at positions 180 degrees opposite to all the protrusions 118B of the flange portion 112B in the circumferential direction of the respective valve bodies 94B. Further, a recess 116B of the flange portion 112B is provided at a position 180 degrees opposite to all the protruding portions 218B of the flange portion 212B in the circumferential direction of each valve body 94B. In other words, the collar portion 112B has a plurality of protrusions 118B that project outward in the radial direction. The flange portion 212B has a recess 216B that is recessed inward in the radial direction at a position opposite to each other in the circumferential direction of the valve body 94B of each of the plurality of protruding portions 118B. Further, the flange portion 212B has a plurality of protruding portions 218B protruding outward in the radial direction. The flange portion 112B has a recess 116B that is recessed inward in the radial direction at a position on the opposite side of the valve body 94B in the circumferential direction of each of the plurality of protruding portions 218B.
　図８に示すように、弁体９４Ｂは、弁室１４１Ａの底部１４２側に、鍔部１１２Ｂを備えている。鍔部１１２Ｂは、シート部１０４よりも径方向外方に延出する。鍔部１１２Ｂの複数の突出部１１８Ｂは、軸部１１１Ａから弁室１４１Ａの内周面１３８に向かって径方向外方に突出している。弁体９４Ｂは、弁室１４１Ａの底部１４２とは反対側に、軸部１１１Ａから弁室１４１Ａの内周面１３８に向かって径方向外方に延出する鍔部２１２Ｂを備えている。鍔部２１２Ｂは、鍔部１１２Ｂの突出部１１８Ｂとは周方向にずれた位置に、複数の突出部２１８Ｂを備えている。突出部２１８Ｂは、軸部１１１Ａから弁室１４１Ａの内周面１３８に向かって径方向外方に突出する。 As shown in FIG. 8, the valve body 94B is provided with a collar portion 112B on the bottom 142 side of the valve chamber 141A. The collar portion 112B extends radially outward from the seat portion 104. The plurality of projecting portions 118B of the flange portion 112B project radially outward from the shaft portion 111A toward the inner peripheral surface 138 of the valve chamber 141A. The valve body 94B is provided with a flange portion 212B extending radially outward from the shaft portion 111A toward the inner peripheral surface 138 of the valve chamber 141A on the side opposite to the bottom portion 142 of the valve chamber 141A. The flange portion 212B is provided with a plurality of protrusions 218B at positions deviated from the protrusion 118B of the collar 112B in the circumferential direction. The projecting portion 218B projects radially outward from the shaft portion 111A toward the inner peripheral surface 138 of the valve chamber 141A.
　第１弁機構８３Ｂにおいて、流入口１０６および弁室１４１Ａを結ぶ方向に対して、第１流出口６１が交差、具体的には直交している。このため、流入口１０６から弁室１４１Ａを介して第１流出口６１に空気が流れる際に、流入口１０６から弁室１４１Ａに流入した空気は、主に弁体９４Ｂの鍔部１１２Ｂの凹部１１６Ｂと弁室１４１Ａの内周面１３８との間を弁体９４Ｂの軸方向に通過した後、弁体９４Ｂの径方向に向きをかえて第１流出口６１から流出する。 In the first valve mechanism 83B, the first outlet 61 intersects, specifically, is orthogonal to the direction connecting the inflow port 106 and the valve chamber 141A. Therefore, when air flows from the inflow port 106 to the first outlet 61 via the valve chamber 141A, the air flowing into the valve chamber 141A from the inflow port 106 is mainly the recess 116B of the flange portion 112B of the valve body 94B. After passing between the valve chamber 141A and the inner peripheral surface 138 of the valve chamber 141A in the axial direction of the valve body 94B, the air flows out from the first outlet 61 by changing the direction in the radial direction of the valve body 94B.
　第２弁機構８４Ｂにおいて、流入口１０６および弁室１４１Ａを結ぶ方向に対して、第２流出口７１が交差、具体的には直交している。このため、流入口１０６から弁室１４１Ａを介して第２流出口７１に空気が流れる際に、流入口１０６から弁室１４１Ａに流入した空気は、主に弁体９４Ｂの鍔部１１２Ｂの凹部１１６Ｂと弁室１４１Ａの内周面１３８との間を弁体９４Ｂの軸方向に通過した後、弁体９４Ｂの径方向に向きをかえて第２流出口７１から流出する。 In the second valve mechanism 84B, the second outlet 71 intersects, specifically, is orthogonal to the direction connecting the inflow port 106 and the valve chamber 141A. Therefore, when air flows from the inflow port 106 to the second outflow port 71 via the valve chamber 141A, the air flowing into the valve chamber 141A from the inflow port 106 is mainly the recess 116B of the flange portion 112B of the valve body 94B. After passing between the valve chamber 141A and the inner peripheral surface 138 of the valve chamber 141A in the axial direction of the valve body 94B, the air flows out from the second outlet 71 by changing the direction in the radial direction of the valve body 94B.
　第３実施形態の差圧弁１１Ｂは、第１弁機構８３Ｂにおいて、一方の空気ばね１５５の空気が流入する流入口１０６が弁室１４１Ａの底部１４２に形成され、他方の空気ばね１５６へ空気を流出する第１流出口６１が弁室１４１Ａの内周面１３８に形成されている。
　このような構造であると、流入口１０６および弁室１４１Ａを結ぶ方向に対して、第１流出口６１が交差する。このため、流入口１０６から弁室１４１Ａを介して第１流出口６１に空気が流れる際に、流入口１０６から弁室１４１Ａに流入した空気は、主に弁体９４Ｂの鍔部１１２Ｂの凹部１１６Ｂと弁室１４１Ａの内周面１３８との間を弁体９４Ｂの軸方向に通過した後、弁体９４Ｂの径方向に向きをかえて第１流出口６１から流出する。このとき、弁体９４Ｂの周方向において第１流出口６１とは反対側に凹部１１６Ｂが位置すると、この凹部１１６Ｂを通過して第１流出口６１に向く空気の流れで、弁体９４Ｂに第１流出口６１に向けて大きな径方向の力が作用する。これにより、弁体９４Ｂが、弁室１４１Ａ内においてシート部１０４とは反対側の鍔部２１２Ｂをシート部１０４側の鍔部１１２Ｂよりも第１流出口６１に近づけるように傾いてしまう可能性がある。 In the differential pressure valve 11B of the third embodiment, in the first valve mechanism 83B, the inflow port 106 into which the air of one air spring 155 flows in is formed at the bottom 142 of the valve chamber 141A, and the air flows out to the other air spring 156. The first outlet 61 is formed on the inner peripheral surface 138 of the valve chamber 141A.
With such a structure, the first outlet 61 intersects the direction connecting the inlet 106 and the valve chamber 141A. Therefore, when air flows from the inflow port 106 to the first outlet 61 via the valve chamber 141A, the air flowing into the valve chamber 141A from the inflow port 106 is mainly the recess 116B of the flange portion 112B of the valve body 94B. After passing between the valve chamber 141A and the inner peripheral surface 138 of the valve chamber 141A in the axial direction of the valve body 94B, the air flows out from the first outlet 61 by changing the direction in the radial direction of the valve body 94B. At this time, if the recess 116B is located on the side opposite to the first outlet 61 in the circumferential direction of the valve body 94B, the air flow passing through the recess 116B and heading toward the first outlet 61 causes the valve body 94B to become the first. A large radial force acts toward the 1 outlet 61. As a result, the valve body 94B may tilt in the valve chamber 141A so that the flange portion 212B on the side opposite to the seat portion 104 is closer to the first outlet 61 than the collar portion 112B on the seat portion 104 side. is there.
　これに対し、第１弁機構８３Ｂは、弁体９４Ｂの鍔部１１２Ｂの凹部１１６Ｂの周方向反対側の位置に、鍔部２１２Ｂの円弧状の突出部２１８Ｂが設けられている。このため、弁体９４Ｂが上記のように傾いても、突出部２１８Ｂが弁室１４１Ａの内周面１３８に線接触し、接触面圧が下がる。よって、弁体９４Ｂの軸方向移動が円滑となる。したがって、開弁圧のばらつきを抑制することが可能となる。 On the other hand, in the first valve mechanism 83B, an arcuate protruding portion 218B of the flange portion 212B is provided at a position opposite to the circumferential direction of the recess 116B of the flange portion 112B of the valve body 94B. Therefore, even if the valve body 94B is tilted as described above, the protruding portion 218B makes line contact with the inner peripheral surface 138 of the valve chamber 141A, and the contact surface pressure is lowered. Therefore, the axial movement of the valve body 94B becomes smooth. Therefore, it is possible to suppress variations in valve opening pressure.
　また、突出部１１８Ｂと突出部２１８Ｂとが周方向にずれて配置されているため、弁体９４Ｂの重量のアンバランスを抑制することができる。 Further, since the protruding portion 118B and the protruding portion 218B are arranged so as to be offset in the circumferential direction, the weight imbalance of the valve body 94B can be suppressed.
　第２弁機構８４Ｂも同様である。 The same applies to the second valve mechanism 84B.
　以上に述べた実施形態の第１の態様は、車体と台車との間に設けられる２つの空気ばねを繋ぐ連通路に配置され、前記２つの空気ばね間の圧力差に応じて前記連通路を開閉する差圧弁である。この差圧弁は、弁室と、該弁室内に設けられる円形状の弁体と、前記弁室の底部に形成され、一方の前記空気ばねの空気が流入する流入口と、前記弁室の内周面に形成され、他方の前記空気ばねへ空気を流出する流出口と、前記弁室の底部に前記流入口を囲むように形成されて前記弁体が着座するシート部と、前記弁体を前記シート部に向けた閉弁方向に付勢する付勢部材と、を有する。前記弁体は、前記シート部よりも径方向外方に延出する第１鍔部を前記底部側に備える。該第１鍔部は、前記弁室の内周面に向かって径方向外方に突出する複数の第１突出部と、該第１突出部の周方向反対側の位置で径方向内方に凹む第１凹部と、を備える。これにより、開弁圧のばらつきを抑制することが可能となる。 The first aspect of the embodiment described above is arranged in a communication passage connecting two air springs provided between the vehicle body and the bogie, and the communication passage is provided according to the pressure difference between the two air springs. A differential pressure valve that opens and closes. The differential pressure valve is formed in the valve chamber, the circular valve body provided in the valve chamber, the inflow port formed at the bottom of the valve chamber, and the air of one of the air springs flows into the valve chamber, and the inside of the valve chamber. An outflow port formed on the peripheral surface and allowing air to flow out to the other air spring, a seat portion formed on the bottom of the valve chamber so as to surround the inflow port and on which the valve body is seated, and the valve body. It has an urging member that urges the seat portion in the valve closing direction. The valve body is provided with a first flange portion extending radially outward from the seat portion on the bottom portion side. The first flange portion includes a plurality of first protruding portions that project radially outward toward the inner peripheral surface of the valve chamber, and radially inward at positions opposite to the circumferential direction of the first protruding portion. It is provided with a first recess that is recessed. This makes it possible to suppress variations in valve opening pressure.
　また、第２の態様は、第１の態様において、前記第１突出部が、周方向に１２０°間隔で形成されている。これにより、開弁圧のばらつきを抑制することが可能となる。また、弁体の加工工数を低減することができる。 Further, in the second aspect, in the first aspect, the first protrusions are formed at intervals of 120 ° in the circumferential direction. This makes it possible to suppress variations in valve opening pressure. In addition, the man-hours for processing the valve body can be reduced.
　また、第３の態様は、第１または第２の態様において、前記弁体は、前記弁室の内周面に向かって径方向外方に延出する第２鍔部を前記底部とは反対側に備え、該第２鍔部は、前記弁室の内周面に向かって径方向外方に突出する複数の第２突出部と、該第２突出部の周方向反対側の位置で径方向内方に凹む第２凹部と、を備える。これにより、開弁圧のばらつきを抑制することが可能となる。 Further, in the third aspect, in the first or second aspect, the valve body has a second flange portion extending radially outward toward the inner peripheral surface of the valve chamber, which is opposite to the bottom portion. In preparation for the side, the second flange portion has a diameter at a position opposite to the circumferential direction of the plurality of second projecting portions protruding outward in the radial direction toward the inner peripheral surface of the valve chamber. It is provided with a second recess that is recessed inward in the direction. This makes it possible to suppress variations in valve opening pressure.
　また、第４の態様は、第３の態様において、前記第２突出部が、周方向に１２０°間隔で形成されている。これにより、開弁圧のばらつきを抑制することが可能となる。 Further, in the fourth aspect, in the third aspect, the second protrusions are formed at intervals of 120 ° in the circumferential direction. This makes it possible to suppress variations in valve opening pressure.
　また、第５の態様は、第３または第４の態様において、前記第１突出部と前記第２突出部とが周方向に一致して配置される。これにより、弁体の加工工数を低減することができるとともに、弁体の周囲での空気の流れを円滑にすることができる。 Further, in the fifth aspect, in the third or fourth aspect, the first protruding portion and the second protruding portion are arranged so as to coincide with each other in the circumferential direction. As a result, the man-hours for processing the valve body can be reduced, and the air flow around the valve body can be smoothed.
　また、第６の態様は、第３または第４の態様において、前記第１突出部と前記第２突出部とが周方向にずれて配置される。これにより、弁体の重量のアンバランスを抑制することができる。 Further, in the sixth aspect, in the third or fourth aspect, the first protruding portion and the second protruding portion are arranged so as to be offset in the circumferential direction. As a result, the imbalance in the weight of the valve body can be suppressed.
　また、第７の態様は、車体と台車との間に設けられる２つの空気ばねを繋ぐ連通路に配置され、前記２つの空気ばね間の圧力差に応じて前記連通路を開閉する差圧弁である。この差圧弁は、弁室と、該弁室内に設けられる円形状の弁体と、前記弁室の底部に形成され、一方の前記空気ばねの空気が流入する流入口と、前記弁室の内周面に形成され、他方の前記空気ばねへ空気を流出する流出口と、前記弁室の底部に前記流入口を囲むように形成されて前記弁体が着座するシート部と、前記弁体を前記シート部に向けた閉弁方向に付勢する付勢部材と、を有する。前記弁体は、前記底部側に、前記シート部よりも径方向外方に延出する第１鍔部を備えると共に、前記底部とは反対側に、前記弁室の内周面に向かって径方向外方に延出する第２鍔部を備える。前記第１鍔部は、前記弁室の内周面に向かって径方向外方に突出する複数の第１突出部を備える。前記第２鍔部は、前記第１突出部とは周方向にずれた位置に、前記弁室の内周面に向かって径方向外方に突出する複数の第２突出部を備える。これにより、開弁圧のばらつきを抑制することが可能となる。 A seventh aspect is a differential pressure valve that is arranged in a communication passage connecting two air springs provided between the vehicle body and the bogie and opens and closes the communication passage according to the pressure difference between the two air springs. is there. The differential pressure valve is formed in the valve chamber, the circular valve body provided in the valve chamber, the inflow port formed at the bottom of the valve chamber, and the air of one of the air springs flows into the valve chamber, and the inside of the valve chamber. An outflow port formed on the peripheral surface and allowing air to flow out to the other air spring, a seat portion formed on the bottom of the valve chamber so as to surround the inflow port and on which the valve body is seated, and the valve body. It has an urging member that urges the seat portion in the valve closing direction. The valve body is provided with a first flange portion that extends radially outward from the seat portion on the bottom portion side, and has a diameter toward the inner peripheral surface of the valve chamber on the side opposite to the bottom portion. It is provided with a second collar that extends outward in the direction. The first flange portion includes a plurality of first projecting portions that project radially outward toward the inner peripheral surface of the valve chamber. The second flange portion is provided with a plurality of second protruding portions that project radially outward toward the inner peripheral surface of the valve chamber at a position deviated from the first protruding portion in the circumferential direction. This makes it possible to suppress variations in valve opening pressure.
　上記した差圧弁によれば、開弁圧のばらつきを抑制することが可能となる。 According to the differential pressure valve described above, it is possible to suppress variations in valve opening pressure.
　１１，１１Ａ，１１Ｂ　　差圧弁
　６１　　第１流出口（流出口）
　７１　　第２流出口（流出口）
　９４，９４Ａ，９４Ｂ　　弁体
　９５　　付勢部材
　１０４　　シート部
　１０６　　流入口
　１５２　　車体
　１５３　　台車
　１５５，１５６　　空気ばね
　１５８，１５９　　連通路
　１４１，１４１Ａ　　弁室
　１４２　　底部
　１３８　　内周面
　１１２，１１２Ａ，１１２Ｂ　　鍔部（第１鍔部）
　１１６，１１６Ｂ　　凹部（第１凹部）
　１１８，１１８Ｂ　　突出部（第１突出部）
　２１２，２１２Ｂ　　鍔部（第２鍔部）
　２１６，２１６Ｂ　　凹部（第２凹部）
　２１８，２１８Ｂ　　突出部（第２突出部） 11, 11A, 11B Differential pressure valve 61 1st outlet (outlet)
71 Second outlet (outlet)
94, 94A, 94B Valve body 95 Biasing member 104 Seat 106 Inflow port 152 Body 153 Bogie 155, 156 Air spring 158, 159 Continuous passage 141, 141A Valve chamber 142 Bottom 138 Inner peripheral surface 112, 112A, 112B Collar ( 1st collar)
116,116B recess (first recess)
118, 118B protruding part (first protruding part)
212,212B collar part (second collar part)
216, 216B recess (second recess)
218,218B protruding part (second protruding part)

Claims (7)

  1. 　車体と台車との間に設けられる２つの空気ばねを繋ぐ連通路に配置され、前記２つの空気ばね間の圧力差に応じて前記連通路を開閉する差圧弁であって、
    　弁室と、
    　該弁室内に設けられる円形状の弁体と、
    　前記弁室の底部に形成され、一方の前記空気ばねの空気が流入する流入口と、
    　前記弁室の内周面に形成され、他方の前記空気ばねへ空気を流出する流出口と、
    　前記弁室の底部に前記流入口を囲むように形成されて前記弁体が着座するシート部と、
    　前記弁体を前記シート部に向けた閉弁方向に付勢する付勢部材と、を有し、
    　前記弁体は、前記シート部よりも径方向外方に延出する第１鍔部を前記底部側に備え、
    　該第１鍔部は、
    　前記弁室の内周面に向かって径方向外方に突出する複数の第１突出部と、
    　該第１突出部の周方向反対側の位置で径方向内方に凹む第１凹部と、を備える
    　差圧弁。     A differential pressure valve that is arranged in a communication passage connecting two air springs provided between a vehicle body and a bogie, and opens and closes the communication passage according to a pressure difference between the two air springs.
    Valve room and
    A circular valve body provided in the valve chamber and
    An inflow port formed at the bottom of the valve chamber and into which the air of one of the air springs flows in,
    An outlet formed on the inner peripheral surface of the valve chamber and allowing air to flow out to the other air spring,
    A seat portion formed at the bottom of the valve chamber so as to surround the inflow port and on which the valve body is seated,
    It has an urging member that urges the valve body toward the seat portion in the valve closing direction.
    The valve body is provided with a first flange portion extending radially outward from the seat portion on the bottom portion side.
    The first brim is
    A plurality of first projecting portions that project radially outward toward the inner peripheral surface of the valve chamber, and
    A differential pressure valve including a first recess that is recessed inward in the radial direction at a position opposite to the circumferential direction of the first protrusion.
  2. 　請求項１に記載の差圧弁であって、
    　前記第１突出部が、周方向に１２０°間隔で形成されている
    　差圧弁。     The differential pressure valve according to claim 1.
    A differential pressure valve in which the first protrusions are formed at intervals of 120 ° in the circumferential direction.
  3. 　請求項１または２に記載の差圧弁であって、
    　前記弁体は、前記弁室の内周面に向かって径方向外方に延出する第２鍔部を前記底部とは反対側に備え、
    　該第２鍔部は、
    　前記弁室の内周面に向かって径方向外方に突出する複数の第２突出部と、
    　該第２突出部の周方向反対側の位置で径方向内方に凹む第２凹部と、を備える
    　差圧弁。     The differential pressure valve according to claim 1 or 2.
    The valve body is provided with a second flange portion that extends radially outward toward the inner peripheral surface of the valve chamber on the side opposite to the bottom portion.
    The second collar is
    A plurality of second protrusions projecting radially outward toward the inner peripheral surface of the valve chamber,
    A differential pressure valve including a second recess that is radially inwardly recessed at a position opposite to the circumferential direction of the second protrusion.
  4. 　請求項３に記載の差圧弁であって、
    　前記第２突出部が、周方向に１２０°間隔で形成されている
    　差圧弁。     The differential pressure valve according to claim 3.
    A differential pressure valve in which the second protrusions are formed at intervals of 120 ° in the circumferential direction.
  5. 　請求項３または４に記載の差圧弁であって、
    　前記第１突出部と前記第２突出部とが周方向に一致して配置される
    　差圧弁。     The differential pressure valve according to claim 3 or 4.
    A differential pressure valve in which the first protruding portion and the second protruding portion are arranged so as to coincide with each other in the circumferential direction.
  6. 　請求項３または４に記載の差圧弁であって、
    　前記第１突出部と前記第２突出部とが周方向にずれて配置される
    　差圧弁。     The differential pressure valve according to claim 3 or 4.
    A differential pressure valve in which the first protruding portion and the second protruding portion are arranged so as to be offset in the circumferential direction.
  7. 　車体と台車との間に設けられる２つの空気ばねを繋ぐ連通路に配置され、前記２つの空気ばね間の圧力差に応じて前記連通路を開閉する差圧弁であって、
    　弁室と、
    　該弁室内に設けられる円形状の弁体と、
    　前記弁室の底部に形成され、一方の前記空気ばねの空気が流入する流入口と、
    　前記弁室の内周面に形成され、他方の前記空気ばねへ空気を流出する流出口と、
    　前記弁室の底部に前記流入口を囲むように形成されて前記弁体が着座するシート部と、
    　前記弁体を前記シート部に向けた閉弁方向に付勢する付勢部材と、を有し、
    　前記弁体は、前記シート部よりも径方向外方に延出する第１鍔部を前記底部側に備えると共に、前記底部とは反対側に、前記弁室の内周面に向かって径方向外方に延出する第２鍔部を備え、
    　前記第１鍔部は、前記弁室の内周面に向かって径方向外方に突出する複数の第１突出部を備え、
    　前記第２鍔部は、前記第１突出部とは周方向にずれた位置に、前記弁室の内周面に向かって径方向外方に突出する複数の第２突出部を備える
    　差圧弁。     A differential pressure valve that is arranged in a communication passage connecting two air springs provided between a vehicle body and a bogie, and opens and closes the communication passage according to a pressure difference between the two air springs.
    Valve room and
    A circular valve body provided in the valve chamber and
    An inflow port formed at the bottom of the valve chamber and into which the air of one of the air springs flows in,
    An outlet formed on the inner peripheral surface of the valve chamber and allowing air to flow out to the other air spring,
    A seat portion formed at the bottom of the valve chamber so as to surround the inflow port and on which the valve body is seated,
    It has an urging member that urges the valve body toward the seat portion in the valve closing direction.
    The valve body is provided with a first flange portion that extends radially outward from the seat portion on the bottom side, and is radially opposite to the bottom portion toward the inner peripheral surface of the valve chamber. Equipped with a second brim that extends outward
    The first flange portion includes a plurality of first projecting portions that project radially outward toward the inner peripheral surface of the valve chamber.
    The second flange portion is a differential pressure valve including a plurality of second protruding portions that project radially outward toward the inner peripheral surface of the valve chamber at a position deviated from the first protruding portion in the circumferential direction.
PCT/JP2020/024177 2019-06-26 2020-06-19 Differential pressure valve WO2020262244A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2021526928A JP7221388B2 (en) 2019-06-26 2020-06-19 Differential pressure valve
CN202080024059.8A CN113661343A (en) 2019-06-26 2020-06-19 Differential pressure valve

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019118690 2019-06-26
JP2019-118690 2019-06-26

Publications (1)

Publication Number Publication Date
WO2020262244A1 true WO2020262244A1 (en) 2020-12-30

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Country Link
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CN (1) CN113661343A (en)
WO (1) WO2020262244A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022540255A (en) * 2019-07-12 2022-09-14 ハヘペ・インターナショナル・ベー．フェー． Check valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005106452A (en) * 2003-09-08 2005-04-21 Tgk Co Ltd Expansion device
JP2014167327A (en) * 2013-02-28 2014-09-11 Kayaba Ind Co Ltd Differential pressure valve
JP2014167319A (en) * 2013-02-28 2014-09-11 Kayaba Ind Co Ltd Leveling valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005106452A (en) * 2003-09-08 2005-04-21 Tgk Co Ltd Expansion device
JP2014167327A (en) * 2013-02-28 2014-09-11 Kayaba Ind Co Ltd Differential pressure valve
JP2014167319A (en) * 2013-02-28 2014-09-11 Kayaba Ind Co Ltd Leveling valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022540255A (en) * 2019-07-12 2022-09-14 ハヘペ・インターナショナル・ベー．フェー． Check valve

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