Sensor mounting structure

Abstract

It is desirable to suppress breakage of a sensor mounting structure in an exhaust component.SOLUTION: The sensor mounting structure includes a wall portion of an exhaust component having a flow path of exhaust gas of a vehicle, an inner portion, an inner through hole penetrating the inner portion, an outer portion facing an outer surface of the wall portion, an outer through hole penetrating the outer portion, and a sensor joint portion. The inner portion includes an inner protruding portion extending from the inner base portion toward the external space through the wall hole of the wall portion. The inner through hole communicates between an external space and a flow path of the exhaust gas. The inner protruding portion is joined to an outer inner peripheral surface surrounding the outer through hole in the outer portion. The sensor joint portion is configured to hold the sensor in a state of passing through the wall hole and the inner through hole.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a sensor mounting structure provided on an exhaust component of a vehicle. [Background technology]

[0002] As described in Patent Document 1, a mounting structure for a sensor such as an oxygen sensor provided in a vehicle exhaust pipe is known. When forming the sensor mounting structure of Patent Document 1, first, spin drilling is performed on the exhaust pipe to form a hole that penetrates the wall of the exhaust pipe and a sleeve that extends from the inner circumferential surface of the wall of the exhaust pipe so as to surround the hole. Then, a thread is formed on the inner circumferential surface of the sleeve, and the sensor is joined to the inner circumferential surface of the sleeve by the thread. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-274959 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the technology of Patent Document 1, the sleeve is formed by deforming the exhaust pipe through spinning drilling, which may result in insufficient thickness in the area surrounding the hole in the exhaust pipe wall and in the sleeve, making the sensor mounting structure more susceptible to damage.

[0005] In one aspect of the present disclosure, it is desirable to inhibit damage to the sensor mounting structure in the exhaust component. [Means for solving the problem]

[0006] One aspect of the present disclosure is a sensor mounting structure provided in an exhaust component having a vehicle exhaust gas flow path, the sensor mounting structure comprising a wall portion, a wall hole, an inner portion, an inner through-hole, an outer portion, an outer through-hole, and a sensor joint. The wall portion has an inner surface facing the exhaust gas flow path and an outer surface located opposite the inner surface and facing an external space of the exhaust gas flow path. The wall hole penetrates the wall portion. The inner portion has an inner base portion arranged to face an inner peripheral region that is a region surrounding the wall hole on the inner surface of the wall portion, and an inner protrusion extending from the inner base portion through the wall hole toward the external space. The inner through-hole penetrates the inner portion passing through the inner base portion and the inner protrusion, and communicates the external space with the exhaust gas flow path. The outer portion is arranged to face an outer peripheral region that is a region surrounding the wall hole on the outer surface of the wall portion. The outer through-hole is arranged to overlap with the wall hole and penetrates the outer portion. The sensor joint is configured to be joined to a sensor. The inner protrusion is joined to an outer inner circumferential surface of the outer portion that surrounds the outer through-hole. The sensor joint is configured to hold the sensor so that the sensor passes through the wall hole and the inner through-hole and the tip of the sensor is positioned within the exhaust gas flow path.

[0007] According to the above configuration, the outer inner circumferential surface of the outer portion is joined to the inner protruding portion that protrudes from the exhaust gas flow path through the wall hole into the external space, thereby holding the outer portion and the inner portion in place around the wall hole. This allows the sensor mounting structure to be provided on the wall portion while minimizing load on the wall portion of the exhaust component. This also reduces damage to the sensor mounting structure in the exhaust component.

[0008] In one aspect of the present disclosure, the inner protrusion and the outer inner circumferential surface may be threadedly engaged. According to the above configuration, it is possible to suppress the application of a load to the wall portion of the exhaust component, while favorably joining the inner protruding portion and the outer inner circumferential surface.

[0009] In one aspect of the present disclosure, the sensor joint may be provided on the outer inner circumferential surface. According to the above configuration, the sensor can be held in a good condition. In one aspect of the present disclosure, the sensor joint may be provided on an inner circumferential surface surrounding the inner through-hole in the inner portion.

[0010] According to the above configuration, the sensor can be held in a good condition. In one aspect of the present disclosure, the sensor interface may be a thread configured to threadably mate with the sensor.

[0011] According to the above configuration, the sensor can be joined well to the sensor mounting structure. In one aspect of the present disclosure, the wall hole may be provided in a portion of the wall that extends in a generally planar shape.

[0012] According to the above configuration, the sensor mounting structure can be properly provided on the exhaust part. An aspect of the present disclosure may further include a seal member disposed between the outer portion and the outer peripheral region.

[0013] According to the above configuration, it is possible to suitably prevent exhaust gas from leaking from the sensor mounting structure. In one aspect of the present disclosure, at least one of the outer portion and the outer peripheral region may be provided with a groove-shaped arrangement portion in which the seal member is arranged.

[0014] According to the above configuration, the seal member can be suitably positioned. In one aspect of the present disclosure, the inner base portion may be joined to the inner peripheral region. According to the above configuration, when assembling the sensor mounting structure to an exhaust part, the outer inner circumferential surface of the outer part can be easily joined to the inner protruding part. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is an explanatory diagram of an exhaust component and a sensor mounting structure according to a first embodiment. FIG. [Figure 2] FIG. 6 is an explanatory diagram of an exhaust component and a sensor mounting structure according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the drawings. [1. First embodiment] [(1) Overview] The sensor mounting structure 1 of the first embodiment is a part of an exhaust part 6 mounted on a vehicle, and is a portion for mounting a sensor 7 on the exhaust part 6 (see FIG. 1). The exhaust part 6 is a part that forms a flow path 60 for exhaust gas from the vehicle engine, and may be, for example, an exhaust pipe, a muffler, or an exhaust gas purification device. The sensor 7 is a part that measures the exhaust gas flowing down the exhaust part 6, and may be, for example, a sensor that measures the concentration of a specific component (e.g., oxygen) contained in the exhaust gas or the temperature of the exhaust gas.

[0017] The sensor mounting structure 1 is provided around a wall hole 23 that penetrates a flat portion 20, which is a plate-like portion that extends in a substantially flat plane, in the wall portion 2 of the exhaust part 6. The wall portion 2 is a portion that separates the exhaust gas flow path 60 in the exhaust part 6 from the external space 61. When the exhaust part 6 is a cylindrical exhaust pipe, the flat portion 20 is a seating surface that is a flattened portion of the exhaust pipe, and may be formed by recessing or bulging part of the exhaust pipe. Of course, this is not limited to this, and the sensor mounting structure 1 may be provided, for example, in a curved or bent portion of the wall portion 2 of the exhaust part 6. Furthermore, the wall hole 23 is, for example, circular, and connects the exhaust gas flow path 60 with the external space 61. Of course, the shape of the wall hole 23 is not limited to circular and may be determined as appropriate.

[0018] Hereinafter, the surface of the wall portion 2 (in other words, the flat surface portion 20) facing the exhaust gas flow path 60 will be referred to as the inner surface 21, and the surface located opposite the inner surface 21 and facing the external space 61 will be referred to as the outer surface 22. The sensor mounting structure 1 comprises the flat surface portion 20 of the wall portion 2, a wall hole 23, an inner portion 3, an outer portion 4, and a sealing member 5.

[0019] [(2) About the inner part] The inner part 3 includes an inner base part 30, an inner protrusion part 31, and an inner through hole 32 (see FIG. 1).

[0020] <Inner base part> The inner base portion 30 is a thick plate-like portion that is arranged in the exhaust gas flow path 60 while facing the inner peripheral region 21A. The inner base portion 30 is, for example, substantially circular, and has a first surface 30A and a second surface 30B that face each other in the thickness direction. The inner peripheral region 21A is the region around the wall hole 23 on the inner surface 21 of the wall portion 2. The inner peripheral region 21A surrounds the wall hole 23 and is adjacent to the wall hole 23.

[0021] The first surface 30A and the second surface 30B are substantially planar, and the first surface 30A extends along the inner side surface 21 of the planar portion 20 and abuts against the inner peripheral region 21A. The abutment area of ​​the first surface 30A with the inner peripheral region 21A surrounds the wall hole 23.

[0022] As an example, the first surface 30A is bonded to the inner peripheral region 21A (details will be described later). However, this is not limiting, and the first surface 30A and the inner peripheral region 21A do not have to be bonded to each other.

[0023] <Inner protrusion> The inner protrusion 31 is a substantially cylindrical portion that extends from the center of the first surface 30A of the inner base portion 30, passing through the wall hole 23, toward the external space 61. As an example, the inner protrusion 31 extends substantially linearly along a central axis A that extends substantially perpendicular to the first surface 30A. The tip 31A of the inner protrusion 31 protrudes outward from the outer surface 22 of the flat portion 20. The tip 31A is the end of the inner protrusion 31 on the opposite side to the first surface 30A.

[0024] In addition, as an example, a thread is formed over the entire outer peripheral surface (hereinafter referred to as inner outer peripheral surface 31B) of the inner protruding portion 31. A portion of the inner outer peripheral surface 31B adjacent to the tip 31A is threadedly engaged with the outer inner peripheral surface 41 of the outer portion 4.

[0025] The inner part 3 may be a bolt-like member with the inner protruding part 31 as a head and the inner protruding part 31 as a shaft. <Inner through hole> The inner through hole 32 is a hole that penetrates the inner base portion 30 and the inner protruding portion 31, and extends along the central axis A from approximately the center of the second surface 30B of the inner base portion 30 to the tip 31A of the inner protruding portion 31. As an example, the inner through hole 32 has a substantially cylindrical shape, and the portion of the inner through hole 32 that penetrates the inner protruding portion 31 forms an internal space of the cylindrical inner protruding portion 31. The inner through hole 32 communicates between an exhaust gas flow path 60 formed by the exhaust component 6 and an external space 61.

[0026] [(3) Regarding the outer part] The outer portion 4 has a boss configuration and is disposed so as to face an outer peripheral region 22A on the outer surface 22 of the flat portion 20 (see FIG. 1). The outer peripheral region 22A is the region around the wall hole 23 on the outer surface 22 of the wall portion 2. The outer peripheral region 22A surrounds the wall hole 23 and is adjacent to the wall hole 23.

[0027] The outer portion 4 is, for example, a substantially cylindrical portion, and extends substantially linearly from the outer peripheral region 22A along the central axis A. The outer portion 4 has a first end face 42 and a second end face 43 at both ends, with the second end face 43 substantially abutting the outer peripheral region 22A, and the portion of the second end face 43 that substantially abuts the outer peripheral region 22A surrounds the wall hole 23.

[0028] <Outer through hole> The outer portion 4 has an outer through hole 40 that penetrates the outer portion 4 from the first end face 42 to the second end face 43. The outer portion 4 is arranged so that the outer through hole 40 overlaps with the wall hole 23, and the outer through hole 40 extends in a substantially straight line along the central axis A, for example.

[0029] <Outer inner surface> The outer portion 4 has an outer inner peripheral surface 41 that surrounds the outer through-hole 40, and when viewed from the front of the wall hole 23, the outer inner peripheral surface 41 is located inside the edge of the wall hole 23. A thread (in other words, a sensor joint) is formed on the outer inner peripheral surface 41 from the first end face 42 to the second end face 43. A portion of the outer inner peripheral surface 41 near the second end face 43 is threadedly engaged with a portion of the inner outer peripheral surface 31B of the inner protruding portion 31 around the tip 31A.

[0030] <Sealing material> An annular sealing member 5 is disposed between the second end surface 43 of the outer portion 4 and the outer peripheral region 22A. That is, the second end surface 43 of the outer portion 4 and the outer peripheral region 22A are disposed adjacent to each other with the sealing member 5 sandwiched therebetween. The sealing member 5 is made of, for example, resin or metal, and is disposed so as to surround the wall hole 23 while being pressurized by the second end surface 43 and the outer peripheral region 22A. As a result, the second end surface 43 of the outer portion 4 and the outer peripheral region 22A are sealed by the sealing member 5.

[0031] Additionally, the second end surface 43 and the outer peripheral region 22A are each formed with arrangement portions 50, 51, which are groove-shaped portions for positioning the sealing member 5. The arrangement portion 50 of the second end surface 43 extends along an annular path surrounding the outer through-hole 40. The arrangement portion 51 of the outer peripheral region 22A extends along an annular path surrounding the wall hole 23. The arrangement portions 50, 51 are arranged to overlap, and the sealing member 5 is arranged to extend along the arrangement portions 50, 51.

[0032] The arrangement portion may be provided only on one of the second end surface 43 and the outer peripheral region 22A. Furthermore, the arrangement portion may not be provided on the second end surface 43 or the outer peripheral region 22A.

[0033] Furthermore, the seal member 5 does not have to be provided between the second end surface 43 and the outer peripheral region 22A. In other words, the second end surface 43 of the outer part 4 and the outer peripheral region 22A may be arranged to directly abut against each other.

[0034] [(4) Assembly of the sensor mounting structure] The wall portion 2 of the exhaust part 6 is formed by joining a plurality of plate-shaped divided members arranged to surround the exhaust gas flow path 60. When assembling the sensor mounting structure 1, first, the flat portion 20 and the wall hole 23 are formed in the divided member on which the sensor mounting structure 1 is to be provided. For example, if the exhaust part 6 is cylindrical, the exhaust part 6 is formed into a cylindrical shape by joining two divided members each having a semicircular cross section. In this case, the flat portion 20 and the wall hole 23 are formed in one of the divided members.

[0035] The inner portion 3 is positioned so that the first surface 30A of the inner base portion 30 abuts the inner peripheral region 21A of the planar portion 20 of the wall portion 2, and the tip 31A of the inner protrusion 31 protrudes from the wall hole 23 toward the outer surface 22 (see Figure 1).

[0036] At this time, the first surface 30A of the inner base portion 30 may be joined to the inner peripheral region 21A of the wall portion 2 by, for example, welding, more specifically, spot welding or projection welding. Of course, this is not limiting, and the first surface 30A and the inner peripheral region 21A may be joined by a method other than welding.

[0037] Next, the sealing member 5 is placed in the outer peripheral region 22A of the outer surface 22 of the flat portion 20, and then the outer portion 4 is placed in the outer peripheral region 22A. At this time, the part of the inner protruding portion 31 protruding from the wall hole 23 is inserted into the outer through-hole 40 from the second end face 43 side, and the inner outer peripheral surface 31B of the inner protruding portion 31 is joined to the outer inner peripheral surface 41 of the outer portion 4.

[0038] In the first embodiment, as an example, threads are formed on the inner outer peripheral surface 31B of the inner protruding portion 31 and the outer inner peripheral surface 41 of the outer portion 4, and the inner outer peripheral surface 31B and the outer inner peripheral surface 41 are screwed together. Note that the outer peripheral surface 30C of the inner base portion 30 and the outer peripheral surface 44 of the outer portion 4 may be provided with at least two fixing surfaces used to rotate or fix the inner protruding portion 31 and the outer portion 4 when screwing them together. More specifically, for example, the inner protruding portion 31 and the outer portion 4 may have a cross section perpendicular to the central axis A that is a substantially regular hexagon.

[0039] Thereafter, the divided member provided with the inner portion 3 and the outer portion 4 is joined to another divided member by, for example, welding, and the exhaust component 6 is thereby formed. In other words, when the outer part 4 is screwed onto the inner protruding part 31, the area around the wall hole 23 on the flat part 20 of the wall part 2 is sandwiched between the second end face 43 of the outer part 4 and the first surface 30A of the inner base part 30. This fixes the outer part 4 to the flat part 20 of the wall part 2. The seal member 5 between the second end face 43 and the outer peripheral region 22A seals the space between the inner part 3 and the outer part 4, thereby suppressing the outflow of exhaust gas. The inner through hole 32 and the outer through hole 40 are connected, and the exhaust gas flow path 60 and the external space 61 communicate with each other via the inner through hole 32 and the outer through hole 40.

[0040] It should be noted that the first surface 30A of the inner base portion 30 does not have to be joined to the inner peripheral region 21A of the wall portion 2 at a stage before the inner portion 3 and the outer portion 4 are screwed together. In other words, the inner protrusion 31 and the outer inner circumferential surface 41 may be screwed together while the position of the inner portion 3 relative to the flat portion 20 is maintained by other means. Then, the flat portion 20 may be sandwiched between the second end surface 43 of the outer portion 4 and the first surface 30A of the inner base portion 30, thereby fixing the inner portion 3 and the outer portion 4 near the wall hole 23.

[0041] (5) Sensor installation The sensor 7 is configured to be attached to the exhaust part 6 by the sensor attachment structure 1, and includes a main body portion 70, a flange portion 71, a joint portion 72, and a protrusion portion 73 (see FIG. 1).

[0042] The main body 70 is a cylindrical portion, and a terminal 70A for outputting a signal from the sensor 7 is provided at a first end thereof. The flange portion 71 is a flange-shaped portion provided at the second end of the main body portion 70. The flange portion 71 has a first surface 71A and a second surface 71B that face each other in the thickness direction. The first surface 71A is located on the first end side of the main body portion 70, and the second surface 71B is located on the second end side of the main body portion 70.

[0043] The joint portion 72 is a cylindrical portion provided adjacent to the second surface 71B of the flange portion 71, and has a thread formed on its outer circumferential surface 72A. The protruding portion 73 is a cylindrical portion that protrudes from the end face of the joint portion 72 opposite to the flange portion 71, and a tip 73A of the protruding portion 73 is provided with a sensor element for measuring exhaust gas.

[0044] The sensor 7 is attached to the sensor mounting structure 1 by threading the outer peripheral surface 72A of the joint 72 with the outer inner peripheral surface 41 of the outer part 4, which is the sensor joint. At this time, the sensor 7 penetrates the outer through-hole 40, the inner through-hole 32, and the wall hole 23 of the flat part 20, and the tip 73A is held in a state positioned within the exhaust gas flow path 60. The second surface 71B of the flange part 71 of the sensor 7 abuts against the first end surface 42 of the outer part 4, and the joint 72 is positioned within the outer through-hole 40 and faces the tip 31A of the inner protrusion 31 along the central axis A. The protrusion 73 also penetrates the inner through-hole 32. The second surface 71B of the flange part 71 of the sensor 7 abuts against the first end surface 42 of the outer part 4, thereby preventing a gap from forming between the second surface 72B and the first end surface 42. The tip 73A may be located inside the inner through-hole 32.

[0045] [2. Second Embodiment] [(1) Overview] The sensor mounting structure 1 of the second embodiment has a configuration similar to that of the first embodiment, but differs from the first embodiment mainly in that the sensor 7 is joined to the inner circumferential surface 33 of the inner portion 3 (see FIG. 2). Below, the differences between the sensor mounting structure 1 of the second embodiment and the first embodiment will be described.

[0046] [(2) About the inner part] The inner part 3 includes an inner base part 30, an inner protrusion part 31, and an inner through hole 32 (see FIG. 2).

[0047] The inner base portion 30 and the inner protruding portion 31 are configured in the same manner as in the first embodiment. Also, the inner through-hole 32, like in the first embodiment, penetrates the inner base portion 30 and the inner protruding portion 31 and connects the exhaust gas flow path 60 formed by the exhaust component 6 to the external space 61.

[0048] However, a thread used as a sensor joint is formed, for example, over the entire inner circumferential surface (hereinafter referred to as the inner inner circumferential surface 33) surrounding the inner through-hole 32 of the inner part 3. Therefore, the length of the inner protrusion 31 of the second embodiment in the direction of the central axis A is longer than that of the first embodiment.

[0049] [(3) Regarding the outer part] The outer portion 4 is configured as a nut-shaped member, and is disposed so as to face the outer peripheral region 22A on the outer surface 22 of the flat portion 20, as in the first embodiment (see FIG. 2).

[0050] The outer portion 4 is provided to protrude from the outer peripheral region 22A along the central axis A, and has a first end face 42 and a second end face 43 located at opposite ends in the direction of the central axis A. As in the first embodiment, the second end face 43 is substantially in contact with the outer peripheral region 22A, and the portion of the second end face 43 that is substantially in contact with the outer peripheral region 22A surrounds the wall hole 23.

[0051] The outer portion 4 has an outer through-hole 40 and an outer inner peripheral surface 41, similar to those in the first embodiment. The outer inner peripheral surface 41 is threaded, similar to those in the first embodiment. In addition, a seal member 5 similar to that in the first embodiment is disposed between the second end face 43 of the outer portion 4 and the outer peripheral region 22A.

[0052] Furthermore, similar to the first embodiment, the second end surface 43 and / or the outer peripheral region 22A are formed with placement portions 50, 51 for the seal member 5. However, the second end surface 43 and the outer peripheral region 22A do not necessarily have to have placement portions.

[0053] Furthermore, the outer inner circumferential surface 41 is threadedly engaged with the inner outer circumferential surface 31B of the inner protruding portion 31, as in the first embodiment. However, the outer inner circumferential surface 41 is not configured to be threadedly engaged with the sensor 7, which is different from the first embodiment. Furthermore, since the outer inner circumferential surface 41 is not threadedly engaged with the sensor 7, the length of the outer portion 4 in the direction of the central axis A is shorter than in the first embodiment.

[0054] [(4) Assembly of the sensor mounting structure] In the second embodiment, the sensor mounting structure 1 is assembled in the same manner as in the first embodiment.

[0055] (5) Sensor installation In the sensor mounting structure 1 of the second embodiment, the same sensor 7 as in the first embodiment is mounted (see FIG. 2).

[0056] In the second embodiment, the sensor 7 is attached to the sensor mounting structure 1 by threading the outer peripheral surface 72A of the joint 72 of the sensor 7 with the inner inner peripheral surface 33 of the inner protrusion 31, which is the sensor joint.

[0057] At this time, similarly to the first embodiment, the sensor 7 passes through the outer through-hole 40, the inner through-hole 32, and the wall hole 23 of the flat portion 20, and is held with its tip 73A positioned within the exhaust gas flow path 60. Specifically, the second surface 71B of the flange portion 71 of the sensor 7 abuts against the tip 31A of the inner protruding portion 31, the joint portion 72 is positioned within the inner through-hole 32, and the protruding portion 73 passes through the inner through-hole 32 and the wall hole 23 to reach the exhaust gas flow path 60.

[0058] [3.Effects] (1) According to the above embodiment, the outer inner circumferential surface 41 of the outer portion 4 is joined to the inner protruding portion that protrudes from inside the exhaust gas flow path 60 through the wall hole 23 into the external space 61, thereby holding the outer portion 4 and the inner portion 3 in the wall portion 2 around the wall hole 23. This allows the sensor mounting structure 1 to be provided on the wall portion 2 while suppressing the application of load to the wall portion 2. This therefore suppresses damage to the sensor mounting structure 1 in the exhaust part 6.

[0059] That is, it is envisioned that the wall portion 2 is deformed, for example, by spin drilling, and a sleeve for mounting a sensor is formed in the wall portion 2 so as to surround the wall hole 23. In this case, the thickness and length of the sleeve are determined depending on the plate thickness of the wall portion 2 and the size of the wall hole 23, etc. In order to appropriately determine the thickness and length of the sleeve, it may be necessary to adjust the plate thickness of the wall portion 2 and the size of the wall hole 23, etc., which may result in an increase in the weight of the exhaust part 6 or a restriction on the number of sensors 7 that can be mounted. Furthermore, as a result of deforming the wall portion 2 to form the sleeve, a weak part may be formed in the wall portion 2, which may lead to damage to the sensor mounting structure 1.

[0060] In contrast, according to the above embodiment, deformation of the wall portion 2 can be avoided or suppressed when the sensor mounting structure 1 is provided on the wall portion 2. This makes it possible to suppress damage to the sensor mounting structure 1 and an increase in the weight of the exhaust parts 6. Furthermore, it is possible to avoid imposing restrictions on the sensors 7 that can be mounted on the sensor mounting structure 1.

[0061] It is also conceivable to weld a cylindrical sensor boss to the periphery of the wall hole 23 on the outer surface 22 of the wall portion 2 and attach the sensor via the sensor boss. However, in such a case, variations in the shape of the sensor boss and the exhaust component 6 may cause poor welding, which may lead to damage to the exhaust component. Also, heat input during welding may cause distortion in the sensor boss or deformation of the threads pre-formed in the sensor boss, which may require retapping of the sensor boss.

[0062] In contrast, according to the above embodiment, when providing the sensor mounting structure 1 on the wall portion 2, welding to the wall portion 2 can be avoided or reduced. This makes it possible to prevent damage to the sensor mounting structure 1 and reduce the man-hours and costs required to form the sensor mounting structure 1, which can contribute to the promotion of the SDGs.

[0063] (2) The inner protruding portion 31 and the outer inner circumferential surface 41 are joined by screws. This allows the inner protruding portion 31 and the outer inner circumferential surface 41 to be joined well while suppressing the application of load to the wall portion 2 of the exhaust component 6.

[0064] (3) Furthermore, according to the first embodiment, the sensor joint between the sensor 7 and the sensor mounting structure 1 is formed by the threads provided on the outer inner circumferential surface 41. Therefore, the sensor 7 can be held in place well.

[0065] (4) Furthermore, according to the second embodiment, the sensor joint between the sensor 7 and the sensor mounting structure 1 is formed by the threads provided on the inner circumferential surface 33. Therefore, the sensor 7 can be held in place well.

[0066] (5) Furthermore, the sensor mounting structure 1 is provided on the flat surface 20 of the wall 2 of the exhaust part 6. Therefore, the sensor mounting structure 1 can be provided on the exhaust part 6 in a favorable manner. (6) In addition, a seal member 5 is disposed between the second end surface 43 of the outer portion 4 and the outer peripheral region 22A around the wall hole 23. This effectively prevents exhaust gas from leaking from the sensor mounting structure 1.

[0067] (7) Furthermore, a groove-shaped arrangement portion is provided on at least one of the second end surface 43 of the outer portion 4 and the outer peripheral region 22A, which allows the seal member 5 to be positioned in an appropriate manner.

[0068] (8) Furthermore, the first surface 30A of the inner base portion 30 is joined to the inner peripheral region 21A around the wall hole 23. Therefore, when assembling the sensor mounting structure 1 to the exhaust part 6, joining the outer inner circumferential surface 41 and the inner protruding portion 31 becomes easy.

[0069] Furthermore, by joining the inner base portion 30 to the inner peripheral region 21A by spot welding or projection welding, the inner base portion 30 can be welded to the inner peripheral region 21A while suppressing the amount of heat input. This makes it possible to suppress distortion of the sensor mounting structure 1.

[0070] 4. Other Embodiments (1) In the first embodiment, the joint portion 72 of the sensor 7 is screwed onto the outer inner circumferential surface 41 of the outer part 4 of the sensor mounting structure 1. In the second embodiment, the joint portion 72 of the sensor 7 is screwed onto the inner inner circumferential surface 33 of the inner part 3 of the sensor mounting structure 1. However, this is not limiting, and the joint portion 72 of the sensor 7 may be joined to the outer inner circumferential surface 41 or the inner inner circumferential surface 33 by a method other than screwing.

[0071] (2) In the sensor mounting structure 1 of the first and second embodiments, the outer inner peripheral surface 41 of the outer portion 4 and the inner outer peripheral surface 31B of the inner portion 3 are screwed together. However, this is not limiting, and the outer inner peripheral surface 41 and the inner outer peripheral surface 31B may be joined together by a method other than screwing.

[0072] (3) Multiple functions of one component in the above embodiments may be realized by multiple components, or one function of one component may be realized by multiple components. Also, multiple functions of multiple components may be realized by one component, or one function realized by multiple components may be realized by one component. Also, part of the configuration of the above embodiments may be omitted. Also, at least part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments.

[0073] [5. Technical Ideas Disclosed in the Present Specification] [Item 1] A sensor mounting structure provided in an exhaust part having an exhaust gas flow path of a vehicle, a wall portion having an inner surface facing the exhaust gas flow path and an outer surface located opposite the inner surface and facing an external space of the exhaust gas flow path; a wall hole penetrating the wall portion; an inner portion having an inner base portion arranged to face an inner peripheral region that is a region around the wall hole on the inner surface of the wall portion, and an inner protrusion portion extending from the inner base portion through the wall hole toward the external space; an inner through-hole that penetrates the inner portion so as to pass through the inner base portion and the inner protruding portion, and that communicates the external space with the exhaust gas flow path; an outer portion disposed to face an outer peripheral region, which is a region around the wall hole on the outer surface of the wall portion; an outer through-hole that is arranged to overlap the wall hole and penetrates the outer portion; a sensor interface configured to interface with the sensor; the inner protruding portion is joined to an outer inner circumferential surface of the outer portion that surrounds the outer through hole, The sensor joint is configured to hold the sensor in a state where the sensor passes through the wall hole and the inner through-hole and a tip of the sensor is positioned within the flow path of the exhaust gas. Sensor mounting structure.

[0074] [Item 2] The sensor mounting structure according to item 1, The inner protrusion and the outer inner circumferential surface are screwed together. Sensor mounting structure.

[0075] [Item 3] The sensor mounting structure according to item 1 or 2, The sensor joint is provided on the outer inner circumferential surface. Sensor mounting structure.

[0076] [Item 4] The sensor mounting structure according to any one of items 1 to 3, The sensor joint is provided on an inner circumferential surface of the inner portion that surrounds the inner through-hole. Sensor mounting structure.

[0077] [Item 5] The sensor mounting structure according to item 3 or 4, The sensor interface is a thread configured to threadably engage the sensor. Sensor mounting structure.

[0078] [Item 6] The sensor mounting structure according to any one of items 1 to 5, The wall hole is provided in a portion of the wall that extends in a substantially planar shape. Sensor mounting structure.

[0079] [Item 7] The sensor mounting structure according to any one of items 1 to 6, a seal member disposed between the outer portion and the outer peripheral region; Further provided is a sensor mounting structure.

[0080] [Item 8] Item 7. The sensor mounting structure according to item 7, At least one of the outer portion and the outer peripheral region is provided with a groove-shaped arrangement portion in which the seal member is arranged. Sensor mounting structure.

[0081] [Item 9] The sensor mounting structure according to any one of items 1 to 8, The inner base portion is joined to the inner peripheral region. Sensor mounting structure. [Explanation of symbols]

[0082] A...central axis, 1...sensor mounting structure, 2...wall portion, 20...flat portion, 21...inner surface, 21A...inner peripheral region, 22...outer surface, 22A...outer peripheral region, 23...wall hole, 3...inner portion, 30...inner base portion, 30C...outer surface, 31...inner protruding portion, 31A...tip, 31B...inner outer peripheral surface, 32...inner through hole, 33...inner inner peripheral surface, 4...outer portion, 40...outer through hole, 41...outer inner peripheral surface, 44...outer peripheral surface, 5...sealing member, 50, 51...arrangement portion, 6...exhaust part, 60...exhaust gas flow path, 61...external space, 7...sensor.

Claims

1. A sensor mounting structure provided in an exhaust part having an exhaust gas flow path of a vehicle, a wall portion having an inner surface facing the exhaust gas flow path and an outer surface located opposite the inner surface and facing an external space of the exhaust gas flow path; a wall hole penetrating the wall portion; an inner portion having an inner base portion arranged to face an inner peripheral region that is a region around the wall hole on the inner surface of the wall portion, and an inner protrusion portion extending from the inner base portion through the wall hole toward the external space; an inner through-hole that penetrates the inner portion so as to pass through the inner base portion and the inner protruding portion, and that communicates the external space with the exhaust gas flow path; an outer portion disposed to face an outer peripheral region, which is a region around the wall hole on the outer surface of the wall portion; an outer through-hole that is arranged to overlap the wall hole and penetrates the outer portion; a sensor interface configured to interface with the sensor; the inner protruding portion is joined to an outer inner circumferential surface of the outer portion that surrounds the outer through hole, The sensor joint is configured to hold the sensor in a state where the sensor passes through the wall hole and the inner through-hole and a tip of the sensor is positioned within the flow path of the exhaust gas. Sensor mounting structure.

2. The sensor mounting structure according to claim 1, The inner protrusion and the outer inner circumferential surface are screwed together. Sensor mounting structure.

3. The sensor mounting structure according to claim 1, The sensor joint is provided on the outer inner circumferential surface. Sensor mounting structure.

4. The sensor mounting structure according to claim 1, The sensor joint is provided on an inner circumferential surface of the inner portion that surrounds the inner through-hole. Sensor mounting structure.

5. The sensor mounting structure according to claim 3 or 4, The sensor interface is a thread configured to threadably engage the sensor. Sensor mounting structure.

6. The sensor mounting structure according to any one of claims 1 to 4, The wall hole is provided in a portion of the wall that extends in a substantially planar shape. Sensor mounting structure.

7. The sensor mounting structure according to any one of claims 1 to 4, a seal member disposed between the outer portion and the outer peripheral region; Further provided is a sensor mounting structure.

8. The sensor mounting structure according to claim 7, At least one of the outer portion and the outer peripheral region is provided with a groove-shaped arrangement portion in which the seal member is arranged. Sensor mounting structure.

9. The sensor mounting structure according to any one of claims 1 to 4, The inner base portion is joined to the inner peripheral region. Sensor mounting structure.

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