WO2026034236A1 - Soupape de libération de pression et structure de fixation de soupape de libération de pression - Google Patents

Soupape de libération de pression et structure de fixation de soupape de libération de pression

Info

Publication number
WO2026034236A1
WO2026034236A1 PCT/JP2025/026411 JP2025026411W WO2026034236A1 WO 2026034236 A1 WO2026034236 A1 WO 2026034236A1 JP 2025026411 W JP2025026411 W JP 2025026411W WO 2026034236 A1 WO2026034236 A1 WO 2026034236A1
Authority
WO
WIPO (PCT)
Prior art keywords
base member
valve
case
stopper
pressure release
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2025/026411
Other languages
English (en)
Japanese (ja)
Inventor
亨奎 金
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Piolax Inc
Original Assignee
Piolax Inc
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
Priority claimed from JP2024129685A external-priority patent/JP2026027637A/ja
Priority claimed from JP2024129598A external-priority patent/JP2026027594A/ja
Priority claimed from JP2024129597A external-priority patent/JP2026027593A/ja
Application filed by Piolax Inc filed Critical Piolax Inc
Publication of WO2026034236A1 publication Critical patent/WO2026034236A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements
    • H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
    • H01M50/333—Spring-loaded vent valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a pressure release valve and pressure release valve mounting structure that is attached to a case that houses, for example, an electricity storage device, and releases pressure inside the case.
  • Hybrid and electric vehicles generally use power storage devices such as batteries and capacitors.
  • the power storage device is housed inside a case installed inside the vehicle. If the power storage device is a battery such as a lithium-ion battery, a chemical reaction in the battery's electrolyte can produce gas, causing the pressure inside the case to increase. Therefore, a pressure relief valve is attached to the case to reduce the pressure inside the case.
  • Patent Document 1 discloses a pressure release valve for an electricity storage device that releases pressure inside a case.
  • a fixing hole is formed in each fixing portion of the base member.
  • the base member is fixed to the case by threading a screw into the fixing hole in the base member and the fixing hole in the case. As a result, the pressure release valve for an electricity storage device is fixed to the case.
  • the present invention was made in consideration of the above circumstances, and aims to provide a pressure release valve and pressure release valve mounting structure that can improve the efficiency of installation work on a case.
  • One aspect of the present invention is a pressure release valve comprising: a base member fixed to a case having an opening and having an air vent that connects the interior space of the case with the exterior space of the case; a valve member that moves toward and away from the base member to open and close the air vent; and a biasing member that biases the valve member in the direction in which the valve member abuts against the base member; the base member having an insertion portion inserted into the opening, the insertion portion having a retaining portion that engages with the edge of the opening to prevent the insertion portion from slipping out of the opening in the axial direction of the base member, a first stopper portion that restricts rotation of the base member around the axis in a first direction, and a second stopper portion that restricts rotation of the base member in a second direction opposite to the first direction; the first stopper portion is positioned closer to the second direction than the retaining portion, and the retaining portion engages with the edge by rotating in the first direction.
  • the base member has an insertion portion that is inserted into an opening formed in the case.
  • the insertion portion has a retaining portion that prevents the insertion portion from being removed from the opening in the case in the axial direction of the base member.
  • the retaining portion engages with the edge of the opening in the case by rotating in a first direction around the axis of the base member.
  • the pressure release valve of the present invention is attached to the case. In this way, the pressure release valve of the present invention engages with and is attached to the case by rotating relative to the case, without using fastening members such as screws or bolts. This improves the efficiency of the installation work of the pressure release valve of the present invention to the case.
  • the present invention provides a pressure relief valve that can improve the efficiency of installation work on a case.
  • FIG. 1 is a perspective view showing a pressure relief valve and a pressure relief valve mounting structure according to a first embodiment of the present invention
  • 2 is an exploded view showing the pressure relief valve and the pressure relief valve mounting structure according to the present embodiment.
  • FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1.
  • FIG. 2 is a plan view of the base member of the present embodiment as viewed from a direction perpendicular to the axis.
  • FIG. 2 is a perspective view of the base member of the present embodiment as viewed from the back side.
  • FIG. 2 is a perspective view of the base member of the present embodiment as viewed from the front side.
  • FIG. 2 is a plan view of the base member of the present embodiment as viewed from the back side.
  • FIG. 1 is a perspective view showing a pressure relief valve and a pressure relief valve mounting structure according to a first embodiment of the present invention
  • 2 is an exploded view showing the pressure relief valve and the pressure relief valve mounting structure according to the present embodiment.
  • FIG. 2 is a plan view of the base member of the present embodiment as viewed from the front side.
  • 1 is a plan view illustrating a state before the base member of the present embodiment is fixed to the edge of the opening of the case.
  • FIG. 10 is a cross-sectional view taken along the line BB in FIG. 9.
  • FIG. 11 is an enlarged view of an area A5 shown in FIG. 10 .
  • 10 is a plan view showing the state after the base member of the present embodiment has been fixed to the edge of the opening of the case.
  • FIG. 13 is a cross-sectional view taken along the line CC in FIG. 12.
  • FIG. 14 is an enlarged view of an area A6 shown in FIG. 13.
  • FIG. 6 is a perspective view of a pressure relief valve according to a second embodiment of the present invention.
  • FIG. 2 is an exploded view illustrating the pressure relief valve according to the present embodiment.
  • 2 is a cross-sectional view taken along the line GG in FIG. 1.
  • 2 is a cross-sectional view taken along the line HH in FIG. 1.
  • FIG. 10 is a cross-sectional view showing a pressure release valve according to a modified example of the present embodiment.
  • FIG. 2 is a perspective view illustrating a valve member according to the present embodiment.
  • FIG. 2 is a perspective view illustrating a cap according to the present embodiment.
  • FIG. 2 is a perspective view illustrating a state before the cap of the present embodiment is placed on the valve member.
  • 10 is a perspective view showing a state before an engaging portion of the cap and an engaging portion of the valve member are engaged with each other.
  • FIG. 24 is a cross-sectional view taken along the line II in FIG. 23.
  • 24 is a cross-sectional view taken along the line DD in FIG. 23.
  • 10 is a perspective view showing a state after the engaging portion of the cap and the engaging portion of the valve member have engaged with each other.
  • FIG. 27 is a cross-sectional view taken along the line EE in FIG. 26.
  • 27 is a cross-sectional view taken along the cutting plane FF shown in FIG. 26.
  • FIG. 10 is a perspective view of a pressure relief valve according to a third embodiment of the present invention.
  • FIG. 2 is an exploded view of the pressure relief valve of the present embodiment.
  • FIG. 2 is a perspective view of the base member as seen from the back side.
  • FIG. 29(a) is a cross-sectional view of the pressure relief valve taken along line J-J.
  • FIG. 29(a) is a cross-sectional view of the pressure relief valve taken along line K-K.
  • FIG. 34 is a partial enlarged view of the pressure relief valve shown in FIG. 33.
  • FIG. 1 is a perspective view showing a pressure relief valve and a pressure relief valve mounting structure according to a first embodiment of the present invention.
  • FIG. 2 is an exploded view showing the pressure relief valve and the pressure relief valve mounting structure according to this embodiment.
  • FIG. 3 is a cross-sectional view taken along the line AA shown in FIG.
  • the pressure release valve mounting structure comprises a case 9 and a pressure release valve 2.
  • the pressure release valve 2 is attached to the case 9, which houses an electric storage device or the like, and releases gas from inside the case 9 when the pressure inside the case 9 rises, thereby relieving the pressure inside the case 9.
  • Examples of power storage devices that can be housed in case 9 include batteries (lithium ion batteries, etc.) used in hybrid vehicles, including plug-in hybrid vehicles, and electric vehicles, as well as condensers and capacitors.
  • the power storage devices that can be housed in case 9 are not limited to these.
  • the items housed in case 9 are not limited to power storage devices.
  • the case 9 has an opening 91.
  • An edge 92 of the opening 91 has a flange 922.
  • the flange 922 protrudes radially inward from an inner circumferential surface 921 of the edge 92.
  • the "front side” refers to the side of the external space S2 (see FIG. 3) of the case 9 as viewed from the case 9, or the direction from the internal space S1 (see FIG. 3) of the case 9 toward the external space S2 of the case 9.
  • the “rear side” refers to the side of the internal space S1 of the case 9 as viewed from the case 9, or the direction from the external space S2 of the case 9 toward the internal space S1 of the case 9.
  • the pressure release valve 2 comprises a cap 3, a valve member 4, a base member 5, a sealing ring 6, a biasing member 7, and a locking member 8.
  • the base member 5 is fixed to the edge 92 of the opening 91 of the case 9 by rotating in a first direction A11 (see Figure 1) around the axis A1. This will be described in more detail below.
  • the base member 5 also detaches from the edge 92 of the opening 91 of the case 9 by rotating in a second direction A12 (see Figure 1) around the axis A1, i.e., the direction opposite to the first direction A11.
  • Axis A1 is the axis of the base member 5, as well as the axes of the cap 3, valve member 4, seal ring 6, biasing member 7, and locking member 8.
  • the axis of the base member 5 coincides with the axes of the cap 3, valve member 4, seal ring 6, biasing member 7, and locking member 8.
  • the base member 5 has an annular portion 51, a ceiling portion 52, and a rib 53.
  • the annular portion 51 has a generally circular ring shape and forms the radially outermost portion of the base member 5.
  • the annular portion 51 has a valve seat 511.
  • the valve seat 511 has a front surface, i.e., a surface facing the seal portion 42 of the valve member 4.
  • the ceiling portion 52 has a disk shape and is provided inside the annular portion 51. Specifically, the ceiling portion 52 is provided on the front side of the annular portion 51 in the radial center of the base member 5.
  • the ceiling portion 52 has a through hole 521.
  • the through hole 521 is formed in the radial center of the ceiling portion 52 and penetrates the ceiling portion 52 in the direction of the axis A1.
  • the rib 53 is connected to the ceiling portion 52 and the insertion portion 54 (see Figure 4).
  • the ceiling portion 52 is connected to the insertion portion 54 via the rib 53.
  • the insertion portion 54 is connected to the inner circumferential surface 513 of the annular portion 51 (see Figure 6).
  • the ceiling portion 52 is connected to the annular portion 51 via the rib 53 and the insertion portion 54. Details of the insertion portion 54 will be described later.
  • the base member 5 of this embodiment has multiple ribs 53.
  • the multiple ribs 53 are spaced apart from one another in the circumferential direction.
  • Air vents 512 are formed between adjacent ribs 53. The air vents 512 connect the internal space S1 of the case 9 with the external space S2 of the case 9.
  • the valve member 4 has a base portion 41 and a seal portion 42.
  • the base portion 41 is formed from a material harder than the material of the seal portion 42, and has a ceiling portion 411, a peripheral wall portion 412, and a flange portion 413.
  • the ceiling portion 411 has a circular plate shape and is located in the radial center of the valve member 4.
  • An engagement portion 414 is provided on the front surface of the ceiling portion 411. The engagement portion 414 engages with the engagement portion 312 of the cap 3.
  • the peripheral wall portion 412 is connected to the outer peripheral edge of the ceiling portion 411 and extends from the outer peripheral edge of the ceiling portion 411 toward the back side, i.e., the side of the base member 5.
  • the flange portion 413 is connected to the tip of the peripheral wall portion 412 in the extension direction and extends radially outward from the tip of the peripheral wall portion 412 in the extension direction.
  • the seal portion 42 is made of an elastic material such as rubber or elastic elastomer, and is formed integrally with the flange portion 413 of the base portion 41.
  • the seal portion 42 extends radially outward from the outer peripheral edge of the flange portion 413, and also extends from the outer peripheral edge of the flange portion 413 toward the back side, i.e., the base member 5 side.
  • the seal portion 42 moves toward and away from the valve seat 511 of the base member 5 to open and close the air vent 512.
  • the seal portion 42 has a protrusion 421.
  • the protrusion 421 protrudes from the front surface of the flange portion 413 toward the front side. As shown in Figure 3, the protrusion 421 is interposed between the front surface of the flange portion 413 and the back surface of the cap 3, and biases the cap 3 toward the front side.
  • the base 41 further has a shaft 415.
  • the shaft 415 is connected to the radial center of the ceiling 411 and extends from the ceiling 411 along the axis A1 toward the back side, i.e., the base member 5 side.
  • the shaft 415 is inserted into a through-hole 521 formed in the ceiling 52 of the base member 5, and prevents the valve member 4 from coming off the base member 5.
  • the shaft 415 is a retaining part for the valve member 4 against the base member 5. This will be described in more detail later.
  • the shaft portion 415 has an engagement portion 416.
  • the engagement portion 416 is provided at the tip of the shaft portion 415 in the extension direction, and extends radially outward from the outer peripheral surface of the shaft portion 415.
  • the engagement portion 416 engages with the engagement portion 811 of the locking member 8.
  • the cap 3 has a ceiling portion 31, a peripheral wall portion 32, and a flange portion 33.
  • the ceiling portion 31 has a circular plate shape and is located in the radial center of the cap 3.
  • the ceiling portion 31 has a through hole 311.
  • the through hole 311 is formed to extend circumferentially near the outer peripheral edge of the ceiling portion 31, and penetrates the ceiling portion 31 in the direction of the axis A1.
  • An engagement portion 312 is provided on the edge of the through hole 311.
  • the engagement portion 312 protrudes from the edge of the through hole 311 toward the inside of the through hole 311, and engages with an engagement portion 414 provided on the ceiling portion 411 of the valve member 4.
  • the engaging portion 414 of the valve member 4 is inserted into the through-hole 311 of the cap 3, and the cap 3 is rotated in the first direction A11 (see Figure 1), causing the engaging portion 312 of the cap 3 to engage with the engaging portion 414 of the valve member 4.
  • the cap 3 is attached to the valve member 4 and covers the valve member 4.
  • the peripheral wall portion 32 is connected to the outer peripheral edge of the ceiling portion 31 and extends from the outer peripheral edge of the ceiling portion 31 toward the back side, i.e., the valve member 4 side.
  • the flange portion 33 is connected to the tip of the peripheral wall portion 32 in the extension direction and extends radially outward from the tip of the peripheral wall portion 32 in the extension direction. As shown in Figure 3, when the cap 3 is attached to the valve member 4, the flange portion 33 covers the seal portion 42 of the valve member 4 and the valve seat 511 of the base member 5. This allows the cap 3 to prevent water sprayed from, for example, a high-pressure washer from directly hitting the seal portion 42 of the valve member 4.
  • the seal ring 6 commonly known as an "O-ring,” is made of an elastic material such as rubber and has a circular ring shape. As shown in Figure 3, the seal ring 6 is attached to an annular protrusion 514 formed on the back side of the valve seat 511 of the base member 5. The seal ring 6 is interposed between the base member 5 and the case 9, and biases the base member 5 toward the front side.
  • the biasing member 7 is, for example, a coil spring formed by winding a wire of a predetermined diameter at a predetermined pitch. As shown in Figure 3, the biasing member 7 is disposed radially outside the shaft portion 415 of the valve member 4 and is supported by the shaft portion 415.
  • the locking member 8 has a tubular portion 81 and a flange portion 82.
  • the tubular portion 81 has a roughly cylindrical shape and is located in the radial center of the locking member 8.
  • the tubular portion 81 has an engagement portion 811.
  • the engagement portion 811 is located inside the tubular portion 81 and extends radially inward from the inner circumferential surface of the tubular portion 81.
  • the locking member 8 rotates in the second direction A12 (see Figure 1)
  • the engagement portion 811 engages with the engagement portion 416 located on the shaft portion 415 of the valve member 4.
  • the locking member 8 is attached to the tip of the shaft portion 415 of the valve member 4, as shown in Figure 3.
  • the flange portion 82 is connected to the tip of the cylindrical portion 81 in the direction of the axis A1 and extends radially outward from the tip of the cylindrical portion 81. As shown in FIG. 3, the flange portion 82 sandwiches the biasing member 7 together with the ceiling portion 52 of the base member 5. In other words, the biasing member 7 is sandwiched in a contracted state between the flange portion 82 of the locking member 8 and the ceiling portion 52 of the base member 5.
  • the valve member 4 When the pressure in the internal space S1 of the case 9 rises, the valve member 4 is subjected to a force toward the front side from the gas inside the case 9 through the air vent 512.
  • the valve member 4, cap 3, and locking member 8 move together toward the front side while resisting the biasing force of the biasing member 7.
  • the gas in the internal space S1 of the case 9 passes through the air vent 512, passes through the gap created between the seal portion 42 of the valve member 4 and the valve seat 511 of the base member 5, and the gap created between the flange portion 33 of the cap 3 and the annular portion 51 of the base member 5, and is released into the external space S2 of the case 9.
  • the retaining portion 541 is formed by protruding radially outward from the outer peripheral surface 549 of the insertion portion 54, and has a retaining surface 541a facing in the direction of the axis A1.
  • the normal to the retaining surface 541a is along the axis A1.
  • the retaining surface 541a extends in the circumferential direction along the outer peripheral surface 549 of the insertion portion 54.
  • the first stopper portion 542 is positioned closer to the second direction A12 than the retaining portion 541. As shown in Figures 6 to 8, the first stopper portion 542 is formed to protrude radially outward from the outer peripheral surface 549 of the insertion portion 54.
  • the first stopper portion 542 has a first stopper surface 542a facing the first direction A11.
  • the first stopper surface 542a extends radially outward from the outer peripheral surface 549 of the insertion portion 54. In other words, the normal to the first stopper surface 542a is along the tangent to the outer peripheral surface 549 of the insertion portion 54.
  • the retaining surface 541a and the first stopper surface 542a are connected to each other.
  • the first stopper surface 542a is connected to the end of the retaining surface 541a in the second direction A12, and extends from the end of the retaining surface 541a in the second direction A12 along the axis A1 toward the front side.
  • the retaining surface 541a and the first stopper surface 542a do not necessarily have to be connected to each other, and may be separated from each other in the circumferential direction along the outer peripheral surface 549 of the insertion portion 54.
  • the second stopper portion 543 is positioned closer to the first direction A11 than the retaining portion 541.
  • the first stopper portion 542 and the second stopper portion 543 are positioned at positions offset from each other in the circumferential direction along the outer peripheral surface 549 of the insertion portion 54, with the retaining portion 541 sandwiched between them.
  • the second stopper portion 543 is formed to protrude radially outward from the outer peripheral surface 549 of the insertion portion 54.
  • the elastic piece 545 is connected to the radially outer tip of the base 544 and extends circumferentially from the radially outer tip of the base 544 along the outer peripheral surface 549 of the insertion portion 54. As shown in FIG. 8, the elastic piece 545 is spaced apart from the outer peripheral surface 549 of the insertion portion 54. Therefore, as shown by arrow A15 in FIG. 4, the elastic piece 545 is able to bend in the direction of the axis A1. Specifically, the elastic piece 545 bends in the direction of the axis A1 so as to rotate approximately around the base 544.
  • the protrusion 546 is connected to the tip of the elastic piece 545 in the second direction A12. As shown in Figure 4, the protrusion 546 has a shape that protrudes toward the front side beyond the front surface 545a of the elastic piece 545 (see Figures 11 and 14).
  • the second stopper portion 543 has a second stopper surface 546a facing the second direction A12.
  • the second stopper surface 546a is the end surface of the protrusion portion 546 in the second direction A12 and extends radially outward.
  • the normal to the second stopper surface 546a is along the tangent to the outer peripheral surface 549 of the insertion portion 54.
  • the second stopper portion 543 rotates in the first direction A11, causing the second stopper surface 546a to abut against the second end surface 925 (see Figure 2) of the flange portion 922.
  • the second end surface 925 in this embodiment is an example of the "other end surface” of the present invention. Details of this will be described later. In this way, the second stopper portion 543 restricts the base member 5 from rotating in the second direction A12 around the axis A1.
  • FIG. 9 is a plan view showing the state before the base member of this embodiment is fixed to the edge of the opening of the case.
  • FIG. 10 is a cross-sectional view taken along the line BB shown in FIG.
  • FIG. 11 is an enlarged view of an area A5 shown in FIG.
  • FIG. 12 is a plan view showing the state after the base member of this embodiment has been fixed to the edge of the opening of the case.
  • FIG. 13 is a cross-sectional view taken along the line CC shown in FIG.
  • FIG. 14 is an enlarged view of an area A6 shown in FIG. 9 and 12 are plan views of the base member 5 and the opening 91 of the case 9 as viewed from the side of the internal space S1 of the case.
  • the retaining portion 541, the first stopper portion 542, and the second stopper portion 543 are positioned between adjacent flange portions 922 in the circumferential direction. Also, as shown in FIG. 10 and FIG. 11, before the base member 5 is fixed to the edge 92 of the opening 91 of the case 9, the retaining portion 541, the first stopper portion 542, and the second stopper portion 543 are inserted into the opening 91 of the case 9 and are positioned behind the rear surface 923 of the flange portion 922.
  • the abutment surface 547 of the insertion portion 54 abuts against the front surface 93 of the case 9.
  • the front surface 93 of the case 9 is flush with the front surface of the flange portion 922.
  • the back surface 923 of the flange portion 922 is flush with the back surface of the case 9.
  • the flange portion 922 enters the gap S11 between the abutment surface 547 of the insertion portion 54 and the front surface 545a of the elastic piece 545.
  • the protrusion 546 reaches the first end of the flange portion 922.
  • the first end of the flange portion 922 is the end of the flange portion 922 that has a first end surface 924 (see Figure 2) facing the second direction A12, and is an example of the "one end" in the present invention.
  • the plate thickness T of the case 9 is thicker in the direction of the axis A1 than the gap S12 between the abutment surface 547 of the insertion portion 54 and the front surface 546b of the protrusion 546. Therefore, when the base member 5 rotates further in the first direction A11, the protrusion 546 abuts against the first end of the flange portion 922.
  • the elastic piece 545 is capable of bending in the direction of axis A1. Therefore, when the protrusion 546 abuts against the first end of the flange portion 922, the elastic piece 545 bends in the direction of arrow A15 shown in Figures 10 and 11.
  • the elastic piece 545 bends in the direction of arrow A15, causing the second stopper surface 546a to move from the first end side of the flange portion 922 over the flange portion 922 and toward the second end side of the flange portion 922.
  • the second end side of the flange portion 922 is the end of the flange portion 922 having the second end surface 925 (see FIG. 2) facing the first direction A11, and is an example of the "other end" of the present invention.
  • the retaining surface 541a of the retaining portion 541 abuts against the back surface 923 of the flange portion 922.
  • the retaining portion 541 prevents the insertion portion 54 from slipping out toward the front side along the direction of the axis A1.
  • the first stopper surface 542a of the first stopper portion 542 abuts against the first end surface 924 of the flange portion 922.
  • the first stopper portion 542 restricts rotation of the base member 5 in the first direction A11 around the axis A1.
  • the second stopper surface 546a of the second stopper portion 543 abuts against the second end surface 925 of the flange portion 922.
  • the second stopper portion 543 restricts the base member 5 from rotating in the second direction A12 around the axis A1.
  • the second stopper portion 543 restricts the flange portion 922 from rotating relative to the base member 5 in the direction A22 (see FIGS. 13 and 14), which is the same as the first direction A11.
  • the base member 5 has an insertion portion 54 that is inserted into the opening 91 formed in the case 9.
  • the insertion portion 54 has a retaining portion 541 that prevents the insertion portion 54 from coming out of the opening 91 of the case 9 in the direction of the axis A1.
  • the retaining portion 541 engages with the edge 92 of the opening 91 of the case 9 by rotating in the first direction A11 around the axis A1.
  • the pressure release valve 2 of this embodiment is attached to the case 9.
  • the pressure release valve 2 of this embodiment engages with and is attached to the case 9 by rotating it relative to the case 9, without using fastening members such as screws or bolts. This improves the efficiency of the installation work of the pressure release valve 2 of this embodiment to the case 9.
  • the first stopper portion 542 is positioned closer to the second direction A12 around the axis A1 than the retaining portion 541. Therefore, the first stopper portion 542 restricts rotation of the base member 5 in the first direction A11 on the second direction A12 side of the retaining portion 541. Furthermore, the retaining portion 541 prevents the insertion portion 54 from coming out of the opening 91 of the case 9 in the direction of the axis A1 on the first direction A11 side of the first stopper portion 542.
  • the strength of the retaining portion 541 and the first stopper portion 542 can be increased compared to when the retaining surface 541a and the first stopper surface 542a are not connected to each other.
  • the second stopper portion 543 is positioned closer to the first direction A11 around the axis A1 than the retaining portion 541.
  • the first stopper portion 542 and the second stopper portion 543 are positioned offset from each other in the circumferential direction of the insertion portion 54, with the retaining portion 541 in between. Therefore, the first stopper portion 542 alone restricts rotation of the base member 5 in the first direction A11.
  • the second stopper portion 543 alone restricts rotation of the base member 5 in the second direction A12. This improves the durability of the first stopper portion 542 and the second stopper portion 543 compared to when a single stopper portion restricts rotation of the base member 5 in both the first direction A11 and the second direction A12.
  • the elastic piece 545 of the second stopper portion 543 extends circumferentially along the outer peripheral surface 549 of the insertion portion 54, thereby ensuring a longer overall length while miniaturizing the base member 5 compared to when it extends radially from the insertion portion 54.
  • the elastic piece 545 of the second stopper portion 543 can ensure a greater amount of deflection while maintaining strength when the second stopper surface 546a overcomes the flange portion 922.
  • the pressure release valve mounting structure of this embodiment can improve the efficiency of the installation work on the case 9.
  • the plate thickness T of the case 9 is thinner in the direction of the axis A1 than the gap S11 between the abutment surface 547 of the insertion portion 54 and the front surface 545a of the elastic piece 545, and thicker than the gap S12 between the abutment surface 547 of the insertion portion 54 and the front surface 546b of the protrusion 546.
  • the pressure release valve mounting structure of this embodiment can further improve the efficiency of the installation work on the case 9.
  • FIG. 15 is a perspective view showing a pressure relief valve according to a second embodiment of the present invention.
  • FIG. 16 is an exploded view showing the pressure relief valve according to this embodiment.
  • FIG. 17 is a cross-sectional view taken along the line GG shown in FIG.
  • FIG. 18 is a cross-sectional view taken along the line HH in FIG.
  • the pressure release valve 2A of this embodiment is attached to a case 9 that houses an electricity storage device or the like, and when the pressure inside the case 9 increases, it releases the gas inside the case 9, thereby releasing the pressure inside the case 9.
  • the case 9 has an opening 91.
  • An edge 92 of the opening 91 has a flange 922.
  • the flange 922 protrudes radially inward from an inner circumferential surface 921 of the edge 92.
  • the "front side” refers to the side of the external space S2 (see FIG. 17) of the case 9 as viewed from the case 9, or the direction from the internal space S1 (see FIG. 17) of the case 9 toward the external space S2 of the case 9.
  • the “rear side” refers to the side of the internal space S1 of the case 9 as viewed from the case 9, or the direction from the external space S2 of the case 9 toward the internal space S1 of the case 9.
  • the pressure release valve 2A comprises a cap 3, a valve member 4, a base member 5, a seal ring 6, a biasing member 7, and a locking member 8.
  • the base member 5 is fixed to the edge 92 of the opening 91 of the case 9 by rotating in a third direction A16 (see FIG. 15) around the axis A1.
  • the base member 5 also detaches from the edge 92 of the opening 91 of the case 9 by rotating in a fourth direction A17 (see FIG. 15) around the axis A1, i.e., in the direction opposite to the third direction A16.
  • Axis A1 is the axis of the base member 5, as well as the axes of the cap 3, valve member 4, seal ring 6, biasing member 7, and locking member 8.
  • the axis of the base member 5 coincides with the axes of the cap 3, valve member 4, seal ring 6, biasing member 7, and locking member 8.
  • the base member 5 has an annular portion 51, a ceiling portion 52, and a rib 53.
  • the annular portion 51 has a generally circular ring shape and forms the radially outermost portion of the base member 5.
  • the annular portion 51 has a valve seat 511.
  • the valve seat 511 has a front surface, i.e., a surface facing the seal portion 42 of the valve member 4. As shown in Figures 17 and 18, when the base member 5 is fixed to the edge portion 92 of the opening 91 of the case 9, the valve seat 511 is positioned on the periphery of the opening 91 of the case 9.
  • the ceiling portion 52 has a disk shape and is provided inside the annular portion 51. Specifically, the ceiling portion 52 is provided on the front side of the annular portion 51 in the radial center of the base member 5.
  • the ceiling portion 52 has a through hole 521.
  • the through hole 521 is formed in the radial center of the ceiling portion 52 and penetrates the ceiling portion 52 in the direction of the axis A1.
  • the rib 53 is connected to the ceiling portion 52 and the insertion portion 54 (see Figures 17 and 18).
  • the ceiling portion 52 is connected to the insertion portion 54 via the rib 53.
  • the insertion portion 54 is the portion that is inserted into the opening 91 of the case 9, and is connected to the inner surface 513 of the annular portion 51 (see Figure 17).
  • the ceiling portion 52 is connected to the annular portion 51 via the rib 53 and the insertion portion 54.
  • the base member 5 of this embodiment has multiple ribs 53.
  • the multiple ribs 53 are spaced apart from one another in the circumferential direction.
  • Air vents 512 are formed between adjacent ribs 53. The air vents 512 connect the internal space S1 of the case 9 with the external space S2 of the case 9.
  • the valve member 4 has a base portion 41 and a seal portion 42.
  • the base portion 41 is formed from a material harder than the material of the seal portion 42, and has a ceiling portion 411, a peripheral wall portion 412, and a flange portion 413.
  • the ceiling portion 411 has a circular plate shape and is located in the radial center of the valve member 4.
  • the peripheral wall portion 412 is connected to the outer peripheral edge of the ceiling portion 411 and extends from the outer peripheral edge of the ceiling portion 411 toward the back side, i.e., the side of the base member 5.
  • the flange portion 413 is connected to the tip of the peripheral wall portion 412 in the extension direction and extends radially outward from the tip of the peripheral wall portion 412 in the extension direction.
  • the seal portion 42 is made of an elastic material such as rubber or elastic elastomer, and is formed integrally with the flange portion 413 of the base portion 41.
  • the seal portion 42 extends radially outward from the outer peripheral edge of the flange portion 413, and also extends from the outer peripheral edge of the flange portion 413 toward the back side, i.e., the base member 5 side.
  • the seal portion 42 moves toward and away from the valve seat 511 of the base member 5 to open and close the air vent 512.
  • the base 41 further includes an engagement portion 414 and a shaft portion 415.
  • the engagement portion 414 is an example of a "first engagement portion" in the present invention.
  • the engagement portion 414 is provided on the front surface of the ceiling portion 411 and extends circumferentially near the outer periphery of the ceiling portion 411. As shown in FIG. 17, the engagement portion 414 is provided radially outward from the shaft portion 415, and engages with the engagement portion 312 of the cap 3.
  • the engagement portion 414 is provided radially between the shaft portion 415 and the seal portion 42. This will be described in more detail below.
  • the shaft portion 415 is connected to the radial center of the ceiling portion 411 and extends from the ceiling portion 411 along the axis A1 toward the back side, i.e., the base member 5 side.
  • the shaft portion 415 is inserted into a through-hole 521 formed in the ceiling portion 52 of the base member 5, and prevents the valve member 4 from coming off the base member 5.
  • the shaft portion 415 is a retaining portion for preventing the valve member 4 from coming off the base member 5. This will be described in more detail below.
  • the shaft portion 415 has an engagement portion 416.
  • the engagement portion 416 is provided at the tip of the shaft portion 415 in the extension direction, and extends radially outward from the outer peripheral surface of the shaft portion 415.
  • the engagement portion 416 engages with the engagement portion 811 of the locking member 8.
  • the protrusion 421 protrudes from the front surface of the flange portion 413 toward the front side.
  • the protrusion 421 in this embodiment is an example of the "biasing portion" of the present invention.
  • the protrusion 421 is provided between the engagement portion 414 and the seal portion 42 in the radial direction.
  • the protrusion 421 is interposed between the front surface of the flange portion 413 and the back surface of the cap 3, and biases the cap 3 toward the front side, i.e., in the direction away from the valve member 4.
  • the cap 3 has a ceiling portion 31, a peripheral wall portion 32, and a flange portion 33.
  • the ceiling portion 31 has a circular plate shape and is located in the radial center of the cap 3.
  • the ceiling portion 31 has a through hole 311.
  • the through hole 311 is formed near the outer peripheral edge of the ceiling portion 31, extending circumferentially, and penetrates the ceiling portion 31 in the plate thickness direction (i.e., the direction of the axis A1).
  • An engagement portion 312 is provided at the edge of the through hole 311.
  • the engagement portion 312 of this embodiment is an example of a "second engagement portion" of the present invention.
  • the engagement portion 312 protrudes from the edge of the through-hole 311 toward the inside of the through-hole 311 and engages with an engagement portion 414 provided on the ceiling portion 411 of the valve member 4. That is, the engagement portion 414 of the valve member 4 is inserted into the through-hole 311 of the cap 3, and the cap 3 rotates in the third direction A16 (see FIG. 15) around the shaft portion 415 (i.e., around the axis A1), causing the engagement portion 312 of the cap 3 to engage with the engagement portion 414 of the valve member 4. Details of this will be described later. In this way, the cap 3 is attached to the valve member 4 and covers the valve member 4.
  • the peripheral wall portion 32 is connected to the outer peripheral edge of the ceiling portion 31 and extends from the outer peripheral edge of the ceiling portion 31 toward the back side, i.e., the side of the valve member 4.
  • the flange portion 33 is connected to the tip of the peripheral wall portion 32 in the extension direction and extends radially outward from the tip of the peripheral wall portion 32 in the extension direction. As shown in Figures 17 and 18, when the cap 3 is attached to the valve member 4, the flange portion 33 covers the seal portion 42 of the valve member 4 and the valve seat 511 of the base member 5. This allows the cap 3 to prevent water sprayed from, for example, a high-pressure washer from directly hitting the seal portion 42 of the valve member 4.
  • the seal ring 6 commonly known as an "O-ring,” is made of an elastic material such as rubber and has a circular ring shape. As shown in Figures 17 and 18, the seal ring 6 is attached to an annular protrusion 514 formed on the back side of the valve seat 511 of the base member 5. The seal ring 6 is interposed between the base member 5 and the case 9, and biases the base member 5 toward the front side.
  • the biasing member 7 is, for example, a coil spring formed by winding a wire of a predetermined diameter at a predetermined pitch. As shown in Figures 17 and 18, the biasing member 7 is disposed radially outside the shaft portion 415 of the valve member 4 and is supported by the shaft portion 415.
  • the locking member 8 has a tubular portion 81 and a flange portion 82.
  • the tubular portion 81 has a generally cylindrical shape and is located in the radial center of the locking member 8.
  • the tubular portion 81 has an engagement portion 811.
  • the engagement portion 811 is located inside the tubular portion 81 and extends radially inward from the inner circumferential surface of the tubular portion 81.
  • the locking member 8 rotates in the fourth direction A17 (see Figure 15)
  • the engagement portion 811 engages with the engagement portion 416 located on the shaft portion 415 of the valve member 4.
  • the locking member 8 is attached to the tip of the shaft portion 415 of the valve member 4, as shown in Figure 18.
  • the flange portion 82 is connected to the tip of the cylindrical portion 81 in the direction of the axis A1 and extends radially outward from the tip of the cylindrical portion 81. As shown in Figures 17 and 18, the flange portion 82, together with the ceiling portion 52 of the base member 5, sandwiches the biasing member 7. In other words, the biasing member 7 is sandwiched in a contracted state between the flange portion 82 of the locking member 8 and the ceiling portion 52 of the base member 5.
  • the locking member 8 is biased in the direction of arrow A18 shown in Figures 17 and 18, i.e., toward the back side. Because the locking member 8 is attached to the tip of the shaft portion 415 of the valve member 4, the valve member 4 is biased in the direction of arrow A18 shown in Figures 17 and 18, i.e., toward the back side, by the biasing member 7 via the locking member 8. Therefore, when the pressure inside the case 9 is normal, the seal portion 42 contacts the valve seat 511 of the base member 5 and closes the air vent 512. This seals the internal space S1 of the case 9.
  • the valve member 4 When the pressure in the internal space S1 of the case 9 rises, the valve member 4 is subjected to a force toward the front side from the gas inside the case 9 through the air vent 512.
  • the valve member 4, cap 3, and locking member 8 move together toward the front side while resisting the biasing force of the biasing member 7.
  • the gas in the internal space S1 of the case 9 passes through the air vent 512, passes through the gap created between the seal portion 42 of the valve member 4 and the valve seat 511 of the base member 5, and the gap created between the flange portion 33 of the cap 3 and the annular portion 51 of the base member 5, and is released into the external space S2 of the case 9.
  • the maximum travel position (full stroke position) of the valve member 4, cap 3, and locking member 8 is determined by the flange portion 82 of the locking member 8 abutting against the rib 53 of the base member 5.
  • the shaft portion 415 of the valve member 4 and the locking member 8 prevent the valve member 4 from coming off the base member 5.
  • the shaft portion 415 of the valve member 4 and the locking member 8 function as a retaining portion for the valve member 4 from coming off the base member 5.
  • FIG. 19 is a cross-sectional view showing a pressure release valve according to a modification of this embodiment.
  • FIG. 19 corresponds to a cross-sectional view taken along the cutting plane GG shown in FIG.
  • duplicate explanations will be omitted as appropriate, and the following explanation will focus on the differences.
  • the valve member 4B of the pressure release valve 2B has a base 41B and a seal portion 42.
  • the base 41B has an engagement portion 416.
  • the engagement portion 416 of this modified example is an example of the "first engagement portion" of the present invention.
  • the engagement portion 416 is provided on the outer peripheral surface of the peripheral wall portion 412 of the base 41B.
  • the valve member 4B of this modified example differs from the valve member 4 of the present embodiment described above with reference to Figures 15 to 18.
  • the engagement portion 416 protrudes radially outward from the outer peripheral surface of the peripheral wall portion 412 and extends circumferentially along the outer peripheral surface of the peripheral wall portion 412.
  • Cap 3B has a ceiling portion 31, a peripheral wall portion 32B, and a flange portion 33.
  • Peripheral wall portion 32B has a through hole 321.
  • Through hole 321 is formed circumferentially along the outer periphery of peripheral wall portion 32B, and penetrates peripheral wall portion 32B in the thickness direction (i.e., radial direction).
  • An engagement portion 322 is provided on the edge of through hole 321.
  • cap 3B of this modified example differs from cap 3 of the present embodiment described above with reference to Figures 15 to 18.
  • the engagement portion 322 of this modified example is an example of the "second engagement portion" of the present invention.
  • the engaging portion 322 protrudes from the edge of the through-hole 321 toward the inside of the through-hole 321 and engages with an engaging portion 416 provided on the peripheral wall portion 412 of the valve member 4B. That is, when the engaging portion 416 of the valve member 4B is inserted into the through-hole 321 of the cap 3B and the cap 3B rotates in the third direction A16 (see FIG. 15 ) around the shaft portion 415 (i.e., around the axis A1), the engaging portion 322 of the cap 3B engages with the engaging portion 416 of the valve member 4B. In this way, the cap 3B is attached to the valve member 4B and covers the valve member 4B.
  • the other structures are the same as those of the pressure release valve 2A according to this embodiment described above with reference to FIGS.
  • FIG. 20 is a perspective view showing the valve member of this embodiment.
  • the engagement portion 414 is provided on the front surface of the ceiling portion 411 and is formed to extend circumferentially near the outer peripheral edge of the ceiling portion 411.
  • the engagement portion 414 is provided radially outward of the shaft portion 415 and has a first wall portion 414a, a second wall portion 414b, and a third wall portion 414c.
  • the third wall portion 414c is connected to the front end of the first wall portion 414a and the front end of the second wall portion 414b, and, like the first wall portion 414a, extends circumferentially along the outer periphery of the ceiling portion 411. As shown in FIG. 20, the third wall portion 414c functions as the ceiling portion of the engagement portion 414.
  • valve member 4 shown in Figure 20 has four engagement portions 414.
  • the number of engagement portions 414 is not limited to four and may be, for example, three or five or more.
  • FIG. 21 is a perspective view showing the cap of this embodiment.
  • the engaging portion 312 protrudes from the edge of the through hole 311 toward the inside of the through hole 311.
  • the engaging portion 312 is formed on the first hole edge 311a of the through hole 311 and protrudes from the first hole edge 311a toward the inside of the through hole 311.
  • the first hole edge 311a is an edge portion on the outer periphery of the through hole 311 that extends in the circumferential direction.
  • the engaging portion 312 extends in the circumferential direction along the first hole edge 311a of the through hole 311.
  • the engaging portion 312 has a thickness that allows it to fit into the engaging portion 414 of the valve member 4. This will be described in detail later.
  • the engagement portion 312 is spaced circumferentially from the second hole edge 311b of the through hole 311.
  • a gap 311c exists between the engagement portion 312 and the second hole edge 311b of the through hole 311.
  • the second hole edge 311b of the through hole 311 is an edge of the through hole 311 that is located closer to the fourth direction A17 than the first hole edge 311a, and is formed to extend radially.
  • the protrusion 414d of the engagement portion 414 of the valve member 4 fits into the gap 311c.
  • the engaging portion 312 does not necessarily have to be circumferentially separated from the second hole edge 311b, as long as a groove or space is provided into which the protrusion 414d of the engaging portion 414 of the valve member 4 fits.
  • the engaging portion 312 may be connected to the second hole edge 311b, and a recess may be provided at the connection between the engaging portion 312 and the second hole edge 311b into which the protrusion 414d of the engaging portion 414 of the valve member 4 can fit.
  • the cap 3 shown in Figure 21 has four engagement portions 312.
  • the number of engagement portions 312 is not limited to four, and may be, for example, three or five or more.
  • FIG. 22 is a perspective view showing the state before the cap of this embodiment is placed on the valve member.
  • FIG. 23 is a perspective view showing the state before the engaging portion of the cap and the engaging portion of the valve member are engaged with each other.
  • FIG. 24 is a cross-sectional view taken along the line II shown in FIG.
  • FIG. 25 is a cross-sectional view taken along the line DD shown in FIG.
  • FIG. 26 is a perspective view showing the state after the engaging portion of the cap and the engaging portion of the valve member have engaged with each other.
  • FIG. 27 is a cross-sectional view taken along the line EE shown in FIG.
  • FIG. 28 is a cross-sectional view taken along the cutting plane FF shown in FIG.
  • the engagement portion 414 of the valve member 4 is inserted into the through hole 311 of the cap 3.
  • the flange portion 33 of the cap 3 covers the seal portion 42 of the valve member 4 and the valve seat 511 of the base member 5.
  • the engagement portion 414 of the valve member 4 is located inside the through hole 311 on the third direction A16 side of the engagement portion 312 of the cap 3. In other words, the engagement portion 312 of the cap 3 is not yet engaged with the engagement portion 414 of the valve member 4.
  • the engagement portion 312 of the cap 3 moves in the third direction A16 around the axis A1, approaching the engagement portion 414 of the valve member 4.
  • the engagement portion 414 of the valve member 4 moves in the fourth direction A17 around the axis A1 inside the through-hole 311 relative to the cap 3, approaching the engagement portion 312 of the cap 3.
  • the distance between the front surface of the ceiling portion 411 and the back surface of the third wall portion 414c in the direction of axis A1 is longer than the thickness of the engaging portion 312 of the cap 3. Also, the distance between the front surface of the ceiling portion 411 and the back end of the protrusion portion 414d in the direction of axis A1 is the same as the thickness of the engaging portion 312 of the cap 3, or slightly shorter than the thickness of the engaging portion 312 of the cap 3.
  • the engagement portion 312 of the cap 3 fits between the front surface of the ceiling portion 411 and the back surface of the third wall portion 414c.
  • the protrusion 414d of the engagement portion 414 of the valve member 4 fits into the gap 311c formed between the engagement portion 312 of the cap 3 and the second hole edge 311b of the through-hole 311. In this way, as shown in Figures 26 to 28, the engagement portion 312 of the cap 3 engages with the engagement portion 414 of the valve member 4.
  • the second wall portion 414e indicated by the two-dot chain line in Figure 27 when the engaging portion 312 of the cap 3 is engaged with the engaging portion 414 of the valve member 4, the inner surface of the second wall portion 414e may abut against the engaging portion 312 of the cap 3.
  • the second wall portion 414e indicated by the two-dot chain line is an example of the "stopper portion" of the present invention provided at the end of the engaging portion 414 of the valve member 4 in the third direction A16.
  • the engagement portion 414 of the valve member 4 is located radially outward from the shaft portion 415 of the valve member 4.
  • the engagement portion 312 of the cap 3 engages with the engagement portion 414 of the valve member 4 by rotating in the third direction A16 around the shaft portion 415.
  • the cap 3 having the engagement portion 312 engages with the valve member 4 having the engagement portion 414 by rotating in the third direction A16 around the shaft portion 415 of the valve member 4.
  • the pressure release valve 2A of this embodiment can have a lower height in the direction of axis A1 compared to when the cap 3 is attached to the valve member 4 along the axis A1.
  • the second hole edge 311b of the through hole 311 which is located closer to the fourth direction A17 than the first hole edge 311a of the through hole 311 on which the engagement portion 312 of the cap 3 is formed, abuts against the engagement portion 414 of the valve member 4, thereby restricting rotation of the cap 3 in the third direction A16. Therefore, the pressure release valve 2A of this embodiment can restrict rotation of the cap 3 in the third direction A16 inside the through hole 311 of the cap 3. This allows the height of the pressure release valve 2A of this embodiment to be kept even lower in the direction of the axis A1.
  • the pressure release valve 2A of this embodiment can restrict rotation of the cap 3 in the third direction A16 inside the through hole 311 of the cap 3. This allows the pressure release valve 2A of this embodiment to be even lower in height in the direction of the axis A1.
  • the engagement portion 414 of the valve member 4 moves in the fourth direction A17 inside the through hole 311 of the cap 3 relative to the cap 3 and engages with the engagement portion 312 of the cap 3.
  • the engagement portion 414 of the valve member 4 can guide the rotation of the engagement portion 312 formed on the first hole edge 311a of the through hole 311 of the cap 3. This improves the efficiency of the work of attaching the cap 3 to the valve member 4.
  • the protrusion 421 of the valve member 4 is located radially between the engagement portion 414 of the valve member 4 and the seal portion 42 of the valve member 4, and urges the cap 3 in a direction away from the valve member 4. Therefore, the protrusion 421 of the valve member 4 can urge the cap 3 in a direction away from the valve member 4 in the vicinity of the engagement portion 414 of the valve member 4 and the engagement portion 312 of the cap 3. This makes it possible to suppress vibration of the cap 3 relative to the valve member 4 when the engagement portion 312 of the cap 3 is engaged with the engagement portion 414 of the valve member 4.
  • Figure 29 is a perspective view of a pressure release valve 10 according to a third embodiment of the present invention.
  • Figure 29(a) shows the pressure release valve 10 as seen from the front side
  • Figure 29(b) shows the pressure release valve 10 as seen from the back side.
  • the pressure release valve 10 is provided in the case of an electricity storage device.
  • the electricity storage device is, for example, a driving power source mounted on a vehicle.
  • the pressure release valve 10 is normally closed and opens when the pressure in the internal space of the case reaches or exceeds a predetermined value.
  • the pressure release valve 10 comprises a lid member 12, a valve body 14, a base member 16, a cover member 18, a locking member 20, a biasing member 22, and a sealing member 24.
  • the valve body 14 of this embodiment is an example of the "valve member" of the present invention.
  • the back surface of the pressure release valve 10 shown in Figure 29(b) is seated around the opening of the case in accordance with its position.
  • the lid member 12 is located on the top surface, and the cover member 18 covers the side of the pressure release valve 10.
  • Figure 30 is an exploded view of the pressure release valve 10 of this embodiment.
  • the cover member 12 is formed in a dish shape and covers the upper surface of the pressure release valve 10.
  • the cover member 12 has a connecting hole portion 26 and a protrusion portion 28.
  • the connecting hole portion 26 is formed to connect to the valve body 14, and multiple connecting holes 26 are formed spaced apart circumferentially.
  • the protrusion portion 28 is formed inside the connecting hole portion 26 and hooks onto the valve body 14.
  • the valve body 14 is arranged to be movable in the axial direction.
  • the axial direction is the direction along the central axis of the valve body 14, and also the direction along the central axis of the pressure release valve 10.
  • the valve body 14 has a first valve body 14a and a second valve body 14b.
  • the first valve body 14a and the second valve body 14b are integrally formed by two-shot molding.
  • the first valve body 14a is formed from a harder material than the second valve body 14b, and the second valve body 14b is formed from a rubber material.
  • the first valve body 14a has a hook portion 30 and a cylindrical portion 39. Multiple hook portions 30 are formed and are inserted into the connecting hole portion 26 of the lid member 12 to hook onto the protrusion portion 28. This prevents the lid member 12 from coming off.
  • the cylindrical portion 39 is located in the center of the first valve body 14a and penetrates it in the axial direction.
  • a breather (not shown) is provided to cover the upper part of the cylindrical portion 39. The breather opens slightly at a pressure lower than the pressure at which the valve body 14 moves.
  • the second valve body 14b is provided on the outer periphery of the first valve body 14a and is formed in an annular shape.
  • the second valve body 14b is formed so as to hang radially outward toward the base member 16.
  • the seal end 34 of the second valve body 14b abuts against the base member 16 along its entire circumference, maintaining the valve closed state.
  • Figure 31 is a perspective view of the base member 16 as seen from the back side.
  • the base member 16 is placed in the opening of the case.
  • the base member 16 has a tubular portion 36, a flange portion 38, an insertion hole portion 40, and an annular protrusion 43.
  • the tubular portion 36 in this embodiment is an example of the "insertion portion" of the present invention.
  • the tubular portion 36 is formed in a cylindrical shape.
  • the insertion hole 40 is formed in the center of the tubular portion 36, and the valve body 14 can be inserted into it.
  • the insertion hole 40 is formed with a smaller diameter than the inner surface of the tubular portion 36.
  • the tubular portion 36 has a hook portion 46 for securing it to the case.
  • the hook portion 46 in this embodiment is an example of the "anti-slip portion" of the present invention.
  • the hook portions 46 are formed in multiple locations on the outer peripheral surface of the tubular portion 36 and are cantilevered pieces extending circumferentially. Each hook portion 46 has a claw portion 46a at its tip. The claw portion 46a protrudes toward the flange portion 38 and hooks onto the edge of the opening of the case. The hook portions 46 hook onto the edge of the opening of the case when the pressure release valve 10 rotates around its axis.
  • the flange portion 38 protrudes radially outward from the cylindrical portion 36.
  • the surface of the flange portion 38 functions as a valve seat 48, on which the seal end portion 34 of the valve body 14 rests.
  • the outer periphery of the flange portion 38 is formed in a hexagonal shape.
  • the outer periphery of the flange portion 38 is not limited to a hexagonal shape and may be polygonal.
  • the flange portion 38 has protrusions 44 on its outer circumferential edge. Multiple protrusions 44 are formed at intervals around the circumference and protrude radially outward. The flange portion 38 is positioned at the corners of a polygon.
  • the annular protrusion 43 is formed from the base end of the tubular portion 36 to the flange portion 38, and protrudes outward from the outer peripheral surface of the tubular portion 36.
  • the annular protrusion 43 hangs down from the inner edge of the flange portion 38.
  • the cover member 18 is connected to the base member 16 and protects the seal member 24 from the outside in the radial direction.
  • the cover member 18 has an encircling portion 50, an inward protruding portion 57, and a locking portion 59.
  • the encircling portion 50 has a polygonal outer periphery and is formed like a wall that surrounds the outer periphery of the seal member 24. Because the outer periphery of the cover member 18 is polygonal, an operator can use a tool to rotate the pressure release valve 10 around its axis and easily hook the hook portion 46 onto the opening edge of the case.
  • the inward protrusion 57 protrudes radially inward from the encircling portion 50 and is formed in a ring shape.
  • the inward protrusion 57 has a circular inner surface.
  • the locking portion 59 stands upright toward the base member 16 and locks onto the base member 16.
  • the locking portion 59 is a flexible elastic claw that locks onto the protrusion 44 of the base member 16.
  • the locking portion 59 is positioned at a corner of the polygonal cover member 18.
  • the locking portion 59 is located radially outward from the encircling portion 50.
  • the encircling portion 50 is recessed at the corner where the locking portion 59 is formed, allowing the protrusion 44 of the base member 16 to be inserted.
  • the sealing member 24 is formed in an annular shape and is, for example, an O-ring.
  • the sealing member 24 seals between the case and the base member 16, which is fixed to the case. Using a versatile O-ring helps keep costs down.
  • the locking member 20 is fixed to the tip of the cylindrical portion 39 of the first valve body 14a.
  • the locking member 20 has multiple small through-holes, so the tip of the cylindrical portion 39 is not blocked.
  • the locking member 20 has a spring receiving portion 56, a pillar portion 58, and a protruding portion 60.
  • the protruding portion 60 protrudes radially outward from one end of the pillar portion 58 and hooks onto the cylindrical portion 39. This allows the locking member 20 to become one with the valve body 14.
  • the spring receiving portion 56 protrudes radially outward from the other end of the pillar portion 58 and receives the biasing member 22.
  • the biasing member 22 abuts against the base member 16 and the locking member 20, and biases the valve body 14 in the closing direction via the locking member 20. This keeps the valve body 14 in the closed state.
  • Figure 32 is a cross-sectional view of the pressure release valve 10 shown in Figure 29(a) taken along line J-J.
  • the pressure release valve 10 shown in Figure 32 is attached to the case 62 of the electricity storage device.
  • the case 62 has an opening 62a, and the pressure release valve 10 is arranged to close the opening 62a.
  • the opening 62a may be formed on the side or top surface of the case 62.
  • the lid member 12 is connected to the valve body 14 by hooking the hook portion 30 and the protrusion portion 28.
  • the protrusion portion 60 of the locking member 20 is hooked onto the engagement portion 39a of the cylindrical portion 39, and the valve body 14 and the locking member 20 are integrated.
  • the biasing member 22 biases the valve disc 14 against the surface of the base member 16 via the locking member 20. This causes the seal end 34 of the valve disc 14 to seat on the valve seat 48 of the base member 16, closing the valve.
  • a breather 66 is placed in the center of the front side of the valve disc 14, closing one end of the cylindrical portion 39. Because there is a small gap between the breather 66 and the cover member 12, the breather 66 can slightly release the pressure in the internal space of the case 62. When the valve disc 14 receives pressure from the case 62 that exceeds a predetermined value, it opens against the biasing member 22.
  • the locking portion 59 is a resilient claw that extends away from the surface of the case 62 and locks onto the protrusion 44 of the base member 16.
  • the direction away from the surface of the case 62 refers to the orientation when attached to the case 62.
  • the locking portion 59 extends axially from the back side to the front side of the flange portion 38 and locks onto the front side of the flange portion 38.
  • the protrusion 44 is sandwiched between the locking portion 59 and the surrounding portion 50. This connects the cover member 18 to the base member 16.
  • the flange portion 38 has a through-hole 55 that penetrates axially.
  • the through-hole 55 forms part of the water flow path 68. This prevents water from accumulating inside the pressure release valve 10.
  • the through-hole 55 is formed along the locking portion 59, making the locking portion 59 more flexible and also functions as a hole for forming the claw of the locking portion 59.
  • the tubular portion 36 is inserted into the opening 62a of the case 62.
  • the hook portion 46 hooks onto the back surface of the case 62.
  • the annular protrusion 43 abuts against the surface of the case 62.
  • the annular protrusion 43 and the hook portion 46 sandwich the periphery of the opening 62a of the case 62, and the base member 16 is attached to the case 62. Because the cover member 18 is connected to the base member 16, it is fixed to the case 62 together with the cover member 18.
  • the sealing member 24 abuts against the surface of the case 62 and the back surface of the flange portion 38, sealing the gap between the surface of the case 62 and the base member 16. This prevents water from entering between the case 62 and the base member 16 when the base member 16 is attached to the case 62.
  • the cover member 18 is positioned radially outward of the seal member 24 and surrounds it.
  • the accommodation groove 64 is defined by the base member 16 and the cover member 18 and accommodates the seal member 24.
  • the accommodation groove 64 is defined by the annular protrusion 43, the back surface of the flange portion 38, and the inward protrusion 57.
  • the annular protrusion 43 and the inward protrusion 57 face each other radially, limiting the radial movement of the seal member 24.
  • the cover member 18 is separate from the base member 16, there is greater freedom in the design of the base member 16 and the cover member 18.
  • the constraints on the mold used to form the base member 16 and the cover member 18, i.e., the constraints on axial and radial sliding when the mold is parted, are reduced, allowing the hook portion 46 and the accommodating groove 64 to be closer together. This allows the pressure release valve 10 to be made more compact in the radial direction.
  • Forming the hook portion 46 of the base member 16 requires radial sliding of the mold.
  • Forming the accommodating groove 64 separately requires axial sliding of the mold, and a radial distance is required to avoid interference with the radial sliding used to form the hook portion 46. Because the accommodating groove 64 is not formed separately from the base member 16, axial sliding of the mold to form the accommodating groove 64 is not required.
  • the cover member 18 When the pressure release valve 10 is attached to the case 62, the cover member 18 is sandwiched between the surface of the case 62 and the flange portion 38. This prevents the cover member 18 from coming off even if it is damaged by high-pressure water during a car wash.
  • the locking portion 59 locks onto the protrusion 44 radially outward of the seal member 24, and locks onto the protrusion 44 radially outward of the seal end 34 of the valve body 14. As a result, the gap between the base member 16 and the cover member 18 is positioned radially outward of the seal member 24 and the valve body 14.
  • Figure 33 is a cross-sectional view of the pressure release valve 10 shown in Figure 29(a) taken along line K-K.
  • Figure 34 is a partially enlarged view of the pressure release valve 10 shown in Figure 33.
  • a gap 70a is formed between the outer peripheral surface of the flange portion 38 and the inner peripheral surface of the surrounding portion 50
  • a gap 70b is formed between the back surface of the flange portion 38 and the surface of the inward protrusion 57.
  • gaps 70a and 70b that form a water flow path 70 are provided between the cover member 18 and the flange portion 38.
  • the flow path 70 is located radially outward of the seal member 24. Note that the gap 70b may be formed when the flange portion 38 is pressed by the seal member 24 in the installed state.
  • the power storage device is placed under the floor of the vehicle compartment and may be exposed to high-pressure water 72 when the vehicle is washed.
  • high-pressure water 72 is sprayed from the side of the pressure release valve 10
  • water enters the inside of the pressure release valve 10.
  • the flow path 70 discharges the water 72, thereby preventing the water 72 from accumulating inside the pressure release valve 10.
  • the through-hole portion 55 shown in Figure 32 also constitutes part of the flow path 70.
  • the cover member 18 surrounds the seal member 24, preventing the high-pressure water 72 from directly hitting the seal member 24.
  • the cover member 18 prevents the high-pressure water 72 from hitting the seal member 24, deforming it, and entering the interior of the seal member 24.
  • the accommodating groove 64 may be defined only by the cover member 18.
  • the cover member 18 may form at least a portion of the accommodating groove 64.
  • the sealing member 24 abuts against the surfaces of the cover member 18 and the case 62.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Fluid Pressure (AREA)

Abstract

Le problème décrit par la présente invention est de fournir une soupape de libération de pression et une structure de fixation de soupape de libération de pression qui améliorent l'efficacité d'installation sur un boîtier. La solution selon l'invention porte sur une soupape de libération de pression 2 qui comprend un élément de base 5 qui doit être fixé à un boîtier 9 qui présente une ouverture 91, un élément de soupape 4 qui vient en contact avec l'élément de base 5 et se sépare de celui-ci et ouvre et ferme un trou de ventilation 512 dans l'élément de base 5, et un élément de poussée 7 qui pousse l'élément de soupape 4 dans la direction dans laquelle l'élément de soupape 4 vient en contact avec l'élément de base 5. L'élément de base 5 a une partie d'insertion qui est insérée dans l'ouverture 91. La partie d'insertion comprend une partie de retenue qui empêche la partie d'insertion de sortir de l'ouverture 91 dans la direction de l'axe A1 de l'élément de base 5, une première partie de butée qui limite la rotation de l'élément de base 5 dans une première direction autour de l'axe A1, et une seconde partie de butée qui limite la rotation de l'élément de base 5 dans une seconde direction qui est opposée à la première direction. La première partie de butée est disposée plus loin vers le côté seconde direction que la partie de retenue. La partie de retenue tourne dans la première direction pour venir en prise avec une partie bord 92 de l'ouverture 91.
PCT/JP2025/026411 2024-08-06 2025-07-25 Soupape de libération de pression et structure de fixation de soupape de libération de pression Pending WO2026034236A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2024129685A JP2026027637A (ja) 2024-08-06 2024-08-06 圧力解放弁
JP2024-129597 2024-08-06
JP2024129598A JP2026027594A (ja) 2024-08-06 2024-08-06 圧力解放弁および圧力解放弁取付構造
JP2024129597A JP2026027593A (ja) 2024-08-06 2024-08-06 圧力解放弁
JP2024-129598 2024-08-06
JP2024-129685 2024-08-06

Publications (1)

Publication Number Publication Date
WO2026034236A1 true WO2026034236A1 (fr) 2026-02-12

Family

ID=98735220

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2025/026411 Pending WO2026034236A1 (fr) 2024-08-06 2025-07-25 Soupape de libération de pression et structure de fixation de soupape de libération de pression

Country Status (1)

Country Link
WO (1) WO2026034236A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5840061B2 (ja) * 1977-07-05 1983-09-02 レイセオン カンパニ− バルブ・アツセンブリ
JP2016515692A (ja) * 2013-04-18 2016-05-30 ハルキー−ロバーツ・コーポレーションＨａｌｋｅｙ−Ｒｏｂｅｒｔｓ Ｃｏｒｐｏｒａｔｉｏｎ リリーフバルブ
JP2020021897A (ja) * 2018-08-03 2020-02-06 日本ケミコン株式会社 調圧弁、その製造方法、および蓄電デバイスモジュール
JP2022520426A (ja) * 2019-02-12 2022-03-30 ヒューゴ ベンツィング ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト 電池セル等のセル状キャビティ内に生じる圧力を減少させるための圧力リリーフ弁
WO2022255376A1 (fr) * 2021-06-03 2022-12-08 株式会社パイオラックス Soupape de surpression pour un dispositif de stockage d'énergie

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5840061B2 (ja) * 1977-07-05 1983-09-02 レイセオン カンパニ− バルブ・アツセンブリ
JP2016515692A (ja) * 2013-04-18 2016-05-30 ハルキー−ロバーツ・コーポレーションＨａｌｋｅｙ−Ｒｏｂｅｒｔｓ Ｃｏｒｐｏｒａｔｉｏｎ リリーフバルブ
JP2020021897A (ja) * 2018-08-03 2020-02-06 日本ケミコン株式会社 調圧弁、その製造方法、および蓄電デバイスモジュール
JP2022520426A (ja) * 2019-02-12 2022-03-30 ヒューゴ ベンツィング ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト 電池セル等のセル状キャビティ内に生じる圧力を減少させるための圧力リリーフ弁
WO2022255376A1 (fr) * 2021-06-03 2022-12-08 株式会社パイオラックス Soupape de surpression pour un dispositif de stockage d'énergie

Similar Documents

Publication Publication Date Title
JP4950364B2 (ja) 自動車に回転自在に支持されるフラップのためのプッシュ−プッシュ機構を含む駆動手段
US9083163B2 (en) Inlet box mounting structure of car
EP2433755B1 (fr) Outil motorisé
JP4657496B2 (ja) フランジシールアセンブリ
US12331564B2 (en) Vehicle glove box latch
US8740002B2 (en) Cap-installation signal system for filler neck cap
CN107524360B (zh) 防震紧固件和具有该防震紧固件的车辆致动器紧固装置
JP7544201B2 (ja) グロメット
JP2007120489A (ja) 燃料遮断弁
JP7667269B2 (ja) 蓄電デバイス用圧力解放弁
WO2026034236A1 (fr) Soupape de libération de pression et structure de fixation de soupape de libération de pression
US12403856B2 (en) Fixing device for installing pressure-type airbag sensor
KR102333473B1 (ko) 비상 해제 케이블 레버
JP2010106438A (ja) 車両用リッドロック装置
JP2026027593A (ja) 圧力解放弁
WO2022255377A1 (fr) Soupape régulatrice de pression pour dispositif d'accumulation d'énergie
JP2026027594A (ja) 圧力解放弁および圧力解放弁取付構造
CN113167308B (zh) 具有卡口保持特征的气动阀/压力容器塑料金属复合盖
CN112431697B (zh) 燃料箱装置
JP2013021791A (ja) グロメット
JP2008024202A (ja) トレイ開放防止機構
JP2023018341A (ja) 蓄電デバイス用圧力解放弁
US20160312510A1 (en) Safety device for spring-loaded mechanism
JP2008196395A (ja) エンジンカバー
JP2021151075A (ja) グロメットおよびワイヤハーネス

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 25851285

Country of ref document: EP

Kind code of ref document: A1