Fluid joint and manufacturing method of fluid joint

Abstract

To provide a fluid joint which can properly seal a clearance between a block end side and a release end side of a cylinder body while simplifying an assembling process.SOLUTION: A fluid joint comprises a sensor housing having a metal-made housing main body protruding to a fluid passage from a sensor passage, and a resin-made seal member for sealing a seal space. The housing main body comprises a bottomed cylindrical cylinder body whose release end is arranged in a position opposing the seal space of the sensor passage, and whose block end is arranged in the fluid passage, and a flange part protruding toward the seal space from the release end of the cylinder body, continued to the cylinder body in a circumferential direction, and formed with a penetration part penetrating in a thickness direction. The seal member comprises a first seal part adhering to a one-side face of the flange part in the thickness direction, and adhering to a first wall face of the seal space, a second seal part adhering to the other side face of the flange part in the thickness direction, and adhering to a second wall face of the seal space, and a connecting part for connecting the first seal part and the second seal part while passing through the penetration part.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a fluid coupling and a method for manufacturing a fluid coupling. [Background technology]

[0002] Conventionally, there has been known a fluid coupling that connects two hoses through which a fluid passes. A temperature sensor is sometimes attached to such a fluid coupling in order to detect the temperature of the passing fluid (for example, see Patent Document 1).

[0003] The fluid coupling of Patent Document 1 is formed by insert molding the temperature sensor body while holding a metal cylinder that houses the temperature sensor, and by placing an O-ring fitted around the metal cylinder in an annular recess in the temperature sensor body, sealing the space through which the fluid passes and the space in which the connector pin is located. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6384870 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the structure of Patent Document 1 has a problem that if the O-ring becomes misaligned during assembly of the fluid coupling (more specifically, if the O-ring becomes dislodged from the annular recess), the sealing performance is reduced. In other words, to assemble the fluid coupling so that the O-ring does not become dislodged from the annular recess, the assembly process becomes complicated.

[0006] The present invention has been made to solve such problems in the prior art, and its object is to provide a fluid coupling that can properly seal between the closed end and open end of a cylindrical body while simplifying the assembly process. [Means for solving the problem]

[0007] In order to solve such technical problems, the present invention provides a fluid coupling comprising a resin coupling body in which a fluid passage through which a fluid passes, a sensor passage branching off from the fluid passage, and a sealed space extending from the sensor passage in a direction intersecting the extension direction of the sensor passage, a sensor housing comprising a metal housing body protruding from the sensor passage into the fluid passage and a resin seal member sealing the sealed space, and a temperature sensor housed in the sensor housing for detecting the temperature of a fluid passing through the fluid passage, the housing body having an open end disposed in a position facing the sealed space of the sensor passage and a closed end disposed in a position facing the sealed space of the sensor passage, The sealing member comprises a bottomed cylindrical body disposed in a body passage, and a flange portion protruding from the open end of the cylinder toward the sealing space, continuing circumferentially of the cylinder, and having a through portion formed therein that penetrates in the thickness direction, and the sealing member comprises a first sealing portion that is in close contact with one side surface of the flange portion in the thickness direction and a first wall surface that defines one side of the sealing space in the extension direction of the sensor passage, a second sealing portion that is in close contact with the other side surface of the flange portion in the thickness direction and a second wall surface that defines the other side of the sealing space in the extension direction of the sensor passage, and a connecting portion that connects the first sealing portion and the second sealing portion through the through portion. Effect of the Invention

[0008] According to the present invention, it is possible to obtain a fluid coupling that can appropriately seal between the closed end side and the open end side of a cylindrical body while simplifying the assembly process. [Brief description of the drawings]

[0009] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. 2 is an exploded perspective view of the sensor housing according to the embodiment. [Figure 4]FIG. 2 is an exploded cross-sectional view of the sensor housing according to the embodiment. [Diagram 5] FIG. 2 is an assembled perspective view of the sensor housing according to the embodiment. [Figure 6] FIG. 2 is an assembled cross-sectional view of the sensor housing according to the embodiment. [Figure 7] FIG. 2 is a cross-sectional view parallel to the fluid flow of the fluid coupling. [Figure 8] FIG. 2 is a cross-sectional view perpendicular to the fluid flow of the fluid coupling. [Figure 9] 4 is a flowchart of a manufacturing method of a fluid coupling. [Figure 10] 11A and 11B are an assembled perspective view and an exploded perspective view of a sensor housing according to Modification 1. [Figure 11] 11A and 11B are an assembled perspective view and an exploded perspective view of a sensor housing according to Modification 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of a fluid coupling 1 according to the present invention will be described with reference to the drawings. Note that the embodiment described below is an example of how the present invention is embodied, and the scope of the present invention is not limited to the described scope. Therefore, the present invention can be implemented by adding various modifications to the embodiment.

[0011] [Configuration of fluid coupling 1] The fluid coupling 1 according to this embodiment connects, for example, two hoses through which a coolant (fluid) of a radiator mounted on an automobile passes. The radiator may be one that exchanges heat with the coolant of an engine, or one that exchanges heat with the coolant of a battery of an electric automobile. The application of the fluid coupling 1 is not limited to radiators, and may be water-cooled piping for water heaters, air conditioners, computers, etc. Furthermore, the fluid coupling 1 is not limited to one that passes liquid, and may be one that passes gas.

[0012] Fig. 1 is an exploded perspective view of a fluid coupling 1. The fluid coupling 1 serves to connect two hoses through which a fluid passes. The fluid coupling 1 also has a function of detecting the temperature of the fluid passing through. As shown in Fig. 1, the fluid coupling 1 mainly includes a coupling body 10, a sensor housing 20, and a temperature sensor 30.

[0013] The joint body 10 has a generally T-shaped outer shape. The joint body 10 is integrally molded, for example, by injection molding a resin material (for example, PA, PPS, SPS, modified PPE, PE, PP, PVC, etc.). The joint body 10 has connection ports 11a, 11b for connecting two hoses, respectively, and accommodates a sensor housing 20 and a temperature sensor 30. The joint body 10 allows a fluid to pass from one of the connection ports 11a, 11b to which the hoses are connected, to the other, and causes the temperature sensor 30 to detect the temperature of the passing fluid.

[0014] The joint body 10 is composed of, for example, a main cylindrical body 11 and a branched cylindrical body 12 branched off from the main cylindrical body 11. The main cylindrical body 11 is a cylindrical portion with both ends open. The open ends of the main cylindrical body 11 serve as connection ports 11a, 11b. The branched cylindrical body 12 is a portion branched off from the main cylindrical body 11 between the connection ports 11a, 11b. The internal spaces of the main cylindrical body 11 and the branched cylindrical body 12 are in communication. Furthermore, the end (open end 12a) of the branched cylindrical body 12 opposite the main cylindrical body 11 is open.

[0015] Fig. 2 is a cross-sectional view of the joint body 10. As shown in Fig. 2, a fluid passage 13, a sensor passage 14, and a seal space 15 are formed inside the joint body 10. The fluid passage 13 is the internal space of the main cylinder 11 between the connection ports 11a and 11b. The sensor passage 14 is the internal space of the branch cylinder 12. The sensor passage 14 is a space that branches off from the fluid passage 13 and reaches the open end 12a. The seal space 15 is a space provided midway through the sensor passage 14. The seal space 15 is a disk-shaped space that expands in a direction intersecting (orthogonal to) the extension direction of the sensor passage 14 and is continuous in the circumferential direction of the sensor passage 14.

[0016] The fluid passage 13 is a space through which a fluid passes. The sensor passage 14 is a space that accommodates the sensor housing 20 and the temperature sensor 30. The open end 12a of the branching cylinder 12 is an opening that exposes the connector 33 of the temperature sensor 30. The sealed space 15 is a space that accommodates the flange portion 23 of the sensor housing 20 and the seal member 25. The sealed space 15 is a space that is liquid-tight sealed by the seal member 25. As a result, the sensor passage 14 is liquid-tightly sealed on the fluid passage 13 side and the open end 12a side, with the seal space 15 in between.

[0017] As shown in the enlarged view of the main part in FIG. 2, the seal space 15 is defined by a first wall surface 15a, a second wall surface 15b, and a back wall surface 15c. The first wall surface 15a is a disk-shaped wall surface that defines one side of the seal space 15 in the extension direction of the sensor passage 14. The second wall surface 15b is a disk-shaped wall surface that defines the other side of the seal space 15 in the extension direction of the sensor passage 14. That is, the first wall surface 15a and the second wall surface 15b face each other in the extension direction of the sensor passage 14. In addition, the first wall surface 15a and the second wall surface 15b are formed with unevenness that matches the thickness of the flange portion 23 and the seal member 25. The back wall surface 15c is an annular wall surface that connects the outer circumferential ends of the first wall surface 15a and the second wall surface 15b.

[0018] The specific shape of the joint body 10 is not limited to a T-shape as long as it includes the fluid passage 13, the sensor passage 14, and the seal space 15. As another example, the main cylindrical body 11 may be bent into an L-shape.

[0019] The sensor housing 20 is embedded inside the joint body 10. The sensor housing 20 accommodates the sensor element 31 of the temperature sensor 30. The sensor housing 20 is disposed in the fluid passing through the inside of the main cylindrical body 11 while preventing the sensor element 31 from coming into contact with the fluid. Furthermore, the sensor housing 20 seals the inside of the branch cylindrical body 12 so as to prevent the fluid passing through the main cylindrical body 11 from reaching the connector 33. A specific configuration of the sensor housing 20 will be described later with reference to Figs. 3 to 6.

[0020] The temperature sensor 30 detects the ambient temperature and outputs an electrical signal indicating the detected temperature. The temperature sensor 30 includes, for example, a sensor element 31, a cable 32, and a connector 33. The sensor element 31 is housed in the sensor housing 20 and generates an electrical signal indicating the ambient temperature. The sensor element 31 is, for example, a thermostat. One end of the cable 32 is connected to the sensor element 31, and the other end is connected to the connector 33. The connector 33 is fixed inside the branch cylinder 12 outside the sensor housing 20. The connector 33 is attached and detached to an external device through the open end 12a of the branch cylinder 12. As a result, the electrical signal generated by the sensor element 31 is output to an external device through the cable 32 and the connector 33.

[0021] [Detailed configuration of sensor housing 20] Fig. 3 is an exploded perspective view of the sensor housing 20 according to this embodiment. Fig. 4 is an exploded cross-sectional view of the sensor housing 20 according to this embodiment. Fig. 5 is an assembled perspective view of the sensor housing 20 according to this embodiment. Fig. 6 is an assembled cross-sectional view of the sensor housing 20 according to this embodiment. As shown in Figs. 3 to 6, the sensor housing 20 according to this embodiment is composed of, for example, a housing main body 21 and a seal member 25.

[0022] 3 to 6, the housing body 21 is composed of, for example, a cylindrical body 22, a flange portion 23, and a curved portion 24. The housing body 21 is integrally formed, for example, by punching and deep drawing a metal material (for example, brass, aluminum, copper, etc.). That is, the housing body 21 is composed of a material having a higher thermal conductivity than the resin material constituting the joint body 10.

[0023] The cylindrical body 22 has an external shape of a bottomed cylindrical tube (bottomed cylindrical shape) with one end (closed end 22a) closed and the other end (open end 22b) open. That is, the sensor element 31 is inserted into the internal space of the cylindrical body 22 from the open end 22b side and embedded in a thermally conductive gel. The closed end 22a of the cylindrical body 22 is curved along the tip shape of the deep drawing jig. More specifically, the closed end 22a of the cylindrical body 22 is spherical.

[0024] The flange portion 23 is provided at the open end 22b of the cylindrical body 22. The flange portion 23 is a disk-shaped portion that protrudes in a direction intersecting (orthogonal to) the extension direction of the cylindrical body 22 and continues in the circumferential direction of the cylindrical body 22. The flange portion 23 is formed with a plurality of (two in this embodiment) through holes 23a, 23b (an example of a through portion) that penetrate in the thickness direction. The through holes 23a, 23b are formed at a predetermined interval in the circumferential direction of the flange portion 23. The number of through portions is not limited to two.

[0025] The curved portion 24 is a portion that connects the open end 22b of the cylindrical body 22 and the inner peripheral surface of the flange portion 23. The curved portion 24 is curved so as to expand radially from the open end 22b of the cylindrical body 22 toward the inner peripheral surface of the flange portion 23. In other words, the curved portion 24 is curved in an R-shape in the cross section shown in Fig. 4 (a cross section parallel to the extension direction of the cylindrical body 22). The curvature of the curved portion 24 corresponds to the shape of the deep drawing jig.

[0026] The seal member 25 is integrally molded by injection molding a resin material (for example, a thermoplastic elastomer, a thermosetting elastomer, rubber, etc.). The seal member 25 is an elastic body that is elastically deformable. The seal member 25 is formed so as to cover a part of both sides in the thickness direction of the flange portion 23. As shown in Figs. 3 to 6, the seal member 25 is composed of, for example, a first seal portion 26, a second seal portion 27, and connection portions 28a and 28b.

[0027] The first seal portion 26 is a disk-shaped portion that is in close contact with a surface of one side in the thickness direction of the flange portion 23 (closed end 22a side of the cylindrical body 22). The second seal portion 27 is a disk-shaped portion that is in close contact with a surface of the other side in the thickness direction of the flange portion 23 (open end 22b side of the cylindrical body 22). The connection portions 28a, 28b are columnar portions that connect the first seal portion 26 and the second seal portion 27 at positions spaced apart in the circumferential direction. More specifically, the connection portions 28a, 28b connect the first seal portion 26 and the second seal portion 27 through the through holes 23a, 23b and close the through holes 23a, 23b.

[0028] The inner diameter dimension of the first seal portion 26 and the second seal portion 27 is set to be larger than the inner diameter dimension of the flange portion 23 (in other words, the outer dimension of the curved portion 24). Moreover, the outer dimension of the first seal portion 26 and the second seal portion 27 is set to be smaller than the outer dimension of the flange portion 23. That is, the outer edge portions of both sides in the thickness direction of the flange portion 23 are exposed without being covered by the seal member 25. Moreover, the outer peripheral surface of the flange portion 23 is exposed without being covered by the seal member 25. In other words, the seal member 25 covers a portion of the flange portion 23.

[0029] [Positional relationship of components of fluid coupling 1] Fig. 7 is a cross-sectional view parallel to the flow of fluid in the fluid coupling 1. Fig. 8 is a cross-sectional view perpendicular to the flow of fluid in the fluid coupling 1. Note that the temperature sensor 30 is omitted from Figs. 7 and 8.

[0030] 7 and 8, the sensor housing 20 is disposed in the sensor passage 14 with the closed end 22a of the cylinder 22 facing the fluid passage 13 and the open end 22b of the cylinder 22 facing the open end 22b of the branch cylinder 12. A part of the closed end 22a side of the cylinder 22 is located inside the fluid passage 13. More specifically, the closed end 22a of the cylinder 22 reaches a position farther from the branch cylinder 12 than the center of the sensor passage 14. As a result, the sensor element 31 accommodated inside the cylinder 22 detects the temperature of the fluid in the fluid passage 13 through the cylinder 22 and the thermally conductive gel.

[0031] The open end 22b of the cylinder 22 is disposed at a position facing the sealed space 15. The flange portion 23 protrudes toward the sealed space 15. The first seal portion 26 is in close contact with one surface of the flange portion 23 in the thickness direction and the first wall surface 15a of the sealed space 15, in a circumferential direction so as to surround the sensor passage 14. The second seal portion 27 is in close contact with the other surface of the flange portion 23 in the thickness direction and the second wall surface 15b of the sealed space 15, in a circumferential direction so as to surround the sensor passage 14. This blocks the flow of liquid between the fluid passage 13 side of the sealed space 15 and the open end 12a side of the sealed space 15.

[0032] An outer edge of one surface of the flange portion 23 in the thickness direction is in surface contact with the first wall surface 15a without being covered by the seal member 25. Moreover, an outer edge of the other surface of the flange portion 23 in the thickness direction is in surface contact with the second wall surface 15b without being covered by the seal member 25. Furthermore, the outer peripheral surface of the flange portion 23 is in surface contact with the inner wall surface 15c without being covered by the seal member 25. Note that the above-mentioned surface-contacting portion does not necessarily have to function as a sealing surface, but functions as a reference surface for positioning the sensor housing 20 when manufacturing the fluid coupling 1, and as a receiving surface for receiving a load from the fluid passing through the fluid passage 13.

[0033] [Manufacturing method of fluid coupling 1] FIG. 9 is a flowchart of a method for manufacturing the fluid coupling 1.

[0034] First, a roll-shaped metal plate is pressed to form a disk that will be the material for the housing body 21. The through holes 23a and 23b may be formed at the same time as forming the disk, or may be formed in a separate process.

[0035] Next, the disk is deep drawn to form the housing main body 21 having the cylindrical body 22, the flange portion 23, and the curved portion 24 (S1). That is, the central portion of the disk drawn by the deep drawing jig becomes the cylindrical body 22, the outer edge portion of the disk becomes the flange portion 23, and the boundary portion between them becomes the curved portion 24. Step S1 is an example of a first process.

[0036] Next, a resin material is injected into the first mold into which the flange portion 23 (or the entire housing main body 21) is inserted, to form the seal member 25 (S2). By integrally molding the seal member 25 so as to surround the flange portion 23, it is possible to prevent the seal member 25 from coming apart and the relative positions of the housing main body 21 and the seal member 25 from changing in the subsequent steps. Step S2 is an example of the second step.

[0037] Next, a resin material is injected into the second mold into which the sensor housing 20 is inserted to form the fluid coupling 1 (S3). As a result, a part of the closed end 22a side of the cylindrical body 22 is exposed to the fluid passage 13, and the sealing space 15 is sealed by the flange portion 23 and the sealing member 25. Step S3 is an example of a third process.

[0038] Next, the temperature sensor 30 including the sensor element 31 is press-fitted and fixed into the joint body 10 and the sensor housing 20 (more specifically, into the cylindrical body 22) (S4). Note that it is preferable to fix the sensor element 31 in a state where it is in contact with the closed end 22a (i.e., the spherical inner peripheral surface) of the cylindrical body 22. Step S4 is an example of a fourth step.

[0039] [Effects of the embodiment] It is desirable to form the housing body 21 from a metal with high thermal conductivity in order to properly detect the temperature of the fluid passing through the fluid passage 13. On the other hand, when the joint body 10 made of resin is combined with the housing body 21 made of metal, there is a possibility that the sealing performance may be reduced due to the difference in the thermal expansion coefficient.

[0040] Therefore, according to the above embodiment, double sealing is provided by the first seal portion 26 that is in close contact with the flange portion 23 and the first wall surface 15a, and the second seal portion 27 that is in close contact with the flange portion 23 and the second wall surface 15b, thereby appropriately preventing fluid from reaching the installation position of the connector 33.

[0041] Furthermore, by connecting the first seal portion 26 and the second seal portion 27 with the connecting portions 28a, 28b, it is possible to prevent the seal member 25 from coming apart and to prevent the relative position between the housing main body 21 and the seal member 25 from changing during the assembly process of the fluid coupling 1. As a result, it is possible to appropriately seal the space between the closed end 22a side and the open end 22b side of the cylindrical body 22 while simplifying the assembly process.

[0042] Furthermore, according to the above embodiment, the outer peripheral surface and the outer edge portions of both sides in the thickness direction of the flange portion 23 are in surface contact with the wall surfaces 15a to 15c that define the sealed space, without being covered with the seal member 25. This allows the sensor housing 20 to be appropriately positioned with respect to the joint body 10, and also allows the load from the fluid passing through the fluid passage 13 to be appropriately received.

[0043] Furthermore, according to the above embodiment, by forming the closed end 22a of the cylindrical body 22 into a spherical shape, the resistance of the fluid passing through the fluid passage 13 can be reduced.

[0044] In addition, according to the above embodiment, by providing a curved portion 24 between the open end 22b of the cylindrical body 22 and the inner surface of the flange portion 23, stress concentration due to the load from the fluid passing through the fluid passage 13 can be prevented.

[0045] Furthermore, according to the above embodiment, by manufacturing the fluid coupling 1 using the procedure shown in Figure 9, the assembly process can be simplified compared to Patent Document 1, while properly sealing the space between the closed end 22a and the open end 22b of the cylindrical body 22.

[0046] A thermoplastic elastomer is suitable as the material for forming the seal member 25. The fluidity of the elastomer increases when heat is applied, which facilitates the injection molding in step S2.

[0047] Furthermore, by reheating when injection molding the joint body 10 in step S3 (secondary molding), the surface of the seal member 25 solidified in step S2 (primary molding) melts, and the resins at the interface between the joint body 10 and the seal member 25 mix and bond together, resulting in high sealing performance.

[0048] In step S2, the thermoplastic elastomer enters the through holes 23a and 23b provided in the flange portion 23. This allows the thermoplastic elastomer to remain on the surface of the flange portion 23.

[0049] In addition, by using a thermoplastic elastomer that melts during secondary molding, the shape of the sensor housing 20 can be simplified and there is no need to make the surface roughness of the sensor housing 20 fine. As a result, the sensor housing 20 can be manufactured by deep drawing.

[0050] Furthermore, the thermoplastic elastomer has elasticity after molding, so that the expansion and contraction of the thermoplastic elastomer can absorb any gaps that arise due to the difference in linear expansion between the sensor housing 20 and the seal member 25, thereby maintaining the sealing performance.

[0051] [Variation 1] 10 is an assembled perspective view and an exploded perspective view of a sensor housing 20' according to Modification 1. Note that a detailed description of commonalities with the sensor housing 20 will be omitted, and the following description will focus on differences. The main differences between the sensor housings 20 and 20' are the following three points.

[0052] 10, in the sensor housing 20′ according to the first modification, notches 23c and 23d (another example of a through portion) are formed in the flange portion 23 instead of the through holes 23a and 23b. The notches 23c and 23d are formed at a predetermined interval in the circumferential direction. The notches 23c and 23d are open on the outer circumferential surface of the flange portion 23. That is, as long as the through portions penetrate the flange portion 23 in the thickness direction, the periphery may be closed (through holes 23a and 23b) or a part may be open (notches 23c and 23d).

[0053] Furthermore, the seal member 25' according to the first modification example includes connection portions 28c, 28d that connect the first seal portion 26 and the second seal portion 27 through the cutouts 23c, 23d and fill the cutouts 23c, 23d.

[0054] Furthermore, in the sensor housing 20' according to the first modification, a part of the closed end 22a' of the cylindrical body 22 has a planar shape. That is, the shape of the closed end 22a' of the cylindrical body 22 can be appropriately selected in accordance with the shape of the tip end of the deep drawing jig.

[0055] [Variation 2] FIG. 11 is an assembled perspective view and an exploded perspective view of a sensor housing 20″ according to Modification 2. Note that a detailed description of commonalities with sensor housing 20′ will be omitted, and the following description will focus on differences. The main differences between sensor housings 20′ and 20″ are the following three points.

[0056] 11, the sensor housing 20'' according to the second modification includes a seal member 25'' that covers both faces and the outer peripheral surface of the flange portion 23. More specifically, the seal member 25'' according to the second modification includes a first seal portion 26, a second seal portion 27, connection portions 28e and 28f (connection portion 28f is not shown) that fill the cutouts 23c and 23d, and an outer peripheral portion 29.

[0057] The outer circumferential portion 29 is a portion that connects the outer edges of the first seal portion 26 and the second seal portion 27 and is continuous in the circumferential direction. In addition, the outer circumferential portion 29 is a portion that covers the outer circumferential surface of the flange portion 23. This increases the contact area between the joint body 10 and the seal member 25'', further improving the sealing performance.

[0058] Moreover, the sealing member 25'' according to the second modification exposes the curved portion 24. If the curved portion 24 is considered to be a part of the flange portion 23 protruding radially outward from the cylindrical body 22, the sealing member 25'' exposes a part of the inner circumferential side of the flange portion 23 (i.e., the curved portion 24). The curved portion 24 that is exposed and not covered by the sealing member 25'' comes into surface contact with the first wall surface 15a and the second wall surface 15b.

[0059] In this way, sealing members 25, 25', 25'' may expose any location of flange portion 23 or curved portion 24. This prevents sensor housing 20 from wobbling or tilting due to the load applied by the fluid flowing through fluid passage 13, and contributes to maintaining the sealing performance. Note that flange portion 23 according to modification 2 may have through holes 23a, 23b formed therein instead of notches 23c, 23d. [Explanation of symbols]

[0060] Reference Signs List 1: fluid coupling, 10: coupling body, 11: main cylinder, 11a, 11b: connection port, 12: branch cylinder, 12a, 22b: open end, 13: fluid passage, 14: sensor passage, 15: sealing space, 15a: first wall surface, 15b: second wall surface, 15c: inner wall surface, 20, 20', 20'': sensor housing, 21: housing body, 22: cylinder, 22a, 22a '...Closed end, 23...Flange portion, 23a, 23b...Through hole, 23c, 23d...Notch, 24...Curved portion, 25, 25', 25''...Sealing member, 26...First seal portion, 27...Second seal portion, 28a, 28b, 28c, 28d, 28e, 28f...Connection portion, 29...Outer periphery, 30...Temperature sensor, 31...Sensor element, 32...Cable, 33...Connector

Claims

1. a resin joint body having a fluid passage through which a fluid passes, a sensor passage branched from the fluid passage, and a seal space extending from the sensor passage in a direction intersecting an extension direction of the sensor passage; a sensor housing including a metal housing main body protruding from the sensor passage into the fluid passage and a resin seal member sealing the seal space; a temperature sensor accommodated in the sensor housing and configured to detect a temperature of a fluid passing through the fluid passage, The housing body includes: a cylindrical body having a bottom and an open end disposed at a position facing the sealed space of the sensor passage and a closed end disposed in the fluid passage; a flange portion that projects from an open end of the cylindrical body toward the sealing space, continues in a circumferential direction of the cylindrical body, and has a through-portion that penetrates the cylindrical body in a thickness direction; The sealing member is a first seal portion that is in close contact with a surface on one side in a thickness direction of the flange portion and a first wall surface that defines one side of the sealed space in an extension direction of the sensor passage; a second seal portion in close contact with a surface of the flange portion on the other side in the thickness direction and a second wall surface that defines the other side of the sealed space in the extension direction of the sensor passage; a connecting portion that passes through the through portion and connects the first seal portion and the second seal portion.

2. 2. The fluid coupling according to claim 1, A fluid coupling, characterized in that an outer peripheral surface of the flange portion is not covered by the seal member and is in surface contact with an inner wall surface that defines the seal space.

3. 3. The fluid coupling according to claim 2, an outer edge portion of a surface on one side in a thickness direction of the flange portion is not covered by the seal member and is in surface contact with the first wall surface; A fluid coupling, characterized in that an outer edge portion of the other surface of the flange portion in the thickness direction is not covered by the seal member and is in surface contact with the second wall surface.

4. 2. The fluid coupling according to claim 1, A fluid coupling characterized in that the closed end of the cylindrical body is spherical.

5. 2. The fluid coupling according to claim 1, A fluid coupling, characterized in that the housing body has a curved portion connecting an open end of the cylindrical body and the flange portion.

6. 2. The method for manufacturing a fluid coupling according to claim 1, A first step of forming the housing body by deep drawing a metal disk; a second step of forming the seal member by injecting a resin material into a first mold into which the flange portion is inserted; and a third step of injecting a resin material into a second mold into which the sensor housing is inserted to form the fluid coupling.

7. 7. The method for manufacturing a fluid coupling according to claim 6, the resin material forming the sealing member is a thermoplastic elastomer; A method for manufacturing a fluid coupling, characterized in that the surface of the sealing member is melted by the heat of the third step, and resins at the interfaces of the coupling body and the sealing member are mixed and bonded.

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