JP2022104114A - Mounting structure for electronic equipment - Google Patents

Abstract

To suppress damage of electronic equipment due to heat and vibration.SOLUTION: A mounting structure for mounting electronic equipment on a catalyst casing 1 includes: bosses 11,12 having a hollow structure in which a base end part is fixed to the catalyst casing; and a tabular first bracket 13 which is fixed to a tip part of the boss, and on which the electronic equipment is mounted. Compared to the case where the first bracket is directly fixed to the catalyst casing, the heat quantity transmitted to the first bracket from the catalyst casing can be reduced. The boss has a hollow structure, so that the heat transmission amount is made to be smaller, rigidity is secured, and resonance of the first bracket is suppressed.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a mounting structure of an electronic device, and more particularly to a structure for mounting the electronic device in a catalyst casing.

With the recent tightening of exhaust gas regulations in internal combustion engines, the configuration of the exhaust system is becoming more and more complicated. Electronic devices such as sensors or electronic control units for exhaust gas control may be attached to the catalyst casing or heat protector that houses the catalyst.

Japanese Unexamined Patent Publication No. 2017-71943

It is conceivable to fix a plate-shaped bracket to the catalyst casing or heat protector and attach an electronic device to this bracket.

However, the heat from the catalyst raises the temperature of the catalyst casing, and the heat from the catalyst casing raises the temperature of the bracket. In addition, vibration from the engine or the like is transmitted from the catalyst casing to the bracket. Therefore, it is conceivable to fix it to the heat protector in consideration of heat damage, but since the heat protector is held by the elasticity of the heat insulating material, the vibration is larger than that of the casing, and the heat and vibration from the bracket cause the electronic device to vibrate. There is a risk of damage.

Therefore, the present disclosure was devised in view of such circumstances, and an object thereof is to provide a mounting structure of an electronic device capable of suppressing damage to the electronic device due to heat or vibration.

According to one aspect of the present disclosure.
It is a mounting structure for mounting electronic devices on the catalyst casing.
A boss whose base end is fixed to the catalyst casing,
A plate-shaped bracket fixed to the tip of the boss and to which the electronic device is attached,
Provided is a mounting structure for an electronic device, characterized in that it comprises.

Preferably, the boss has a hollow structure.

Preferably, the boss has a hollow hole extending from its proximal surface to the distal end side.

Preferably, the mounting structure comprises another plate-shaped bracket that is secured to the bracket and to which another electronic device is mounted.

Preferably, the mounting structure is located between the catalyst casing and the bracket and comprises a heat protector that covers the catalyst casing.
The other bracket is also fixed to the heat protector.

According to the present disclosure, damage to electronic devices due to heat or vibration can be suppressed.

It is an exploded perspective view of the mounting structure of the electronic device which concerns on this embodiment. It is a perspective view which shows the assembly state of the mounting structure of the electronic device which concerns on this embodiment. FIG. 2 is a sectional view taken along line III-III of FIG. FIG. 2 is a sectional view taken along line IV-IV of FIG.

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be noted that the present disclosure is not limited to the following embodiments.

As an example, the present embodiment discloses a structure for attaching an electronic device to a catalyst casing provided in an exhaust system of an internal combustion engine for a vehicle (also referred to as an engine). The internal combustion engine is a diesel engine, and the vehicle is a large vehicle such as a truck. However, the type, type, application, etc. of the internal combustion engine and the vehicle are not particularly limited. For example, the engine may be a natural gas engine or a gasoline engine, and the vehicle may be a small vehicle such as a passenger car. The internal combustion engine may be mounted on a moving body other than a vehicle, for example, a ship, a construction machine, or an industrial machine. Further, the internal combustion engine does not have to be mounted on a moving body, and may be a stationary engine.

FIG. 1 shows an exploded perspective view of a mounting structure of an electronic device, and FIG. 2 shows an assembled state thereof.

Reference numeral 1 indicates a generally cylindrical catalyst casing. The central axis of the catalyst casing 1, that is, the casing axis is indicated by reference numeral C. Hereinafter, unless otherwise specified, the axial direction, the radial direction, and the circumferential direction with respect to the casing axis C are simply referred to as the axial direction, the radial direction, and the circumferential direction.

For convenience, each direction of front, back, left, right, up and down is defined as shown in the figure. However, it should be noted that each of these directions is only defined for convenience of explanation. One end side in the axial direction is the front side, and the other end side is the rear side. The front side is the inlet side of the catalyst casing 1 and the rear side is the outlet side of the catalyst casing 1, but these may be reversed.

The catalyst casing 1 houses the catalyst B (see FIGS. 3 and 4) inside the catalyst casing 1. The catalyst B of the present embodiment is a selective reduction NOx catalyst (so-called SCR (Selective Catalytic Reduction) catalyst). However, the type of catalyst B can be arbitrarily selected.

The catalyst casing 1 is made of a metal such as stainless steel and is generally a circular tube extending in the axial direction. The front end portion in the axial direction is narrowed down so as to have a smaller diameter toward the front side, and a front flange 2 for connecting to the exhaust pipe on the other side is provided at the tip thereof. Similarly, the rear end portion in the axial direction is also narrowed down so as to have a smaller diameter toward the rear side, and a rear side flange 3 is provided at the tip thereof.

The outer peripheral surface 4 of the catalyst casing 1 is covered with a sheet-shaped heat insulating material 5 made of a heat insulating material such as glass wool. The outer peripheral surface 4 is substantially entirely covered by the two heat insulating materials 5 that cover each half of the circumference. As a result, the catalyst casing 1 and the catalyst B inside the catalyst casing 1 can be kept warm.

Further, the outer peripheral surface 4 of the catalyst casing 1 is covered with the heat protector 6 with the heat insulating material 5 sandwiched between them. The heat protector 6 is made of a metal such as aluminum, and includes two semi-tubular divided pieces 7 obtained by vertically dividing a circular tube extending in the axial direction. Flange 8s are provided at the upper and lower edge portions of the two divided pieces 7. When these flanges 8 are fixed to each other by caulking, welding, bolting, etc., the heat protector 6 becomes a circular tube as shown in FIG. The heat protector 6 sandwiches the heat insulating material 5 with the catalyst casing 1 and holds the heat insulating material 5. Further, the heat protector 6 covers the catalyst casing 1 and prevents a person or an object from coming into direct contact with the high temperature catalyst casing 1.

The mounting structure of the present embodiment includes bosses 11 and 12 whose base ends are fixed to the catalyst casing 1 and plate-shaped brackets 13 which are fixed to the tips of the bosses 11 and 12 and to which electronic devices are mounted. Be prepared. Further, the mounting structure of the present embodiment includes another plate-shaped bracket 14 fixed to the bracket 13 and to which another electronic device is mounted.

Hereinafter, the boss 11 is referred to as a first boss 11, the boss 12 is referred to as a second boss 12, the bracket 13 is referred to as a first bracket 13, and another bracket 14 is referred to as a second bracket 14. Further, an electronic device is referred to as a first electronic device, another electronic device is referred to as a second electronic device, and is represented by reference numerals E1 and E2, respectively, as shown by virtual lines in FIGS. 3 and 4.

As shown in FIG. 1, in the present embodiment, two bosses, a first boss 11 on the front side and a second boss 12 on the rear side, are erected on the outer peripheral surface 4 of the catalyst casing 1. These bosses 11 and 12 are inserted into the insertion holes 15 and 16 provided in the heat insulating material 5 and the heat protector 6, respectively, and project outward from the heat protector 6 in the radial direction. The bosses 11 and 12 are made of a metal such as stainless steel and have a columnar shape extending in the radial direction.

FIG. 3 is a sectional view taken along line III-III of FIG. 2 cut at the position of the first boss 11 in the axial direction. As shown in the figure, the base end surface 17 of the first boss 11 is seated on the outer peripheral surface 4 of the catalyst casing 1. Then, in that state, the base end portion of the first boss 11 and the outer peripheral surface 4 of the catalyst casing 1 are fixed by welding. A flange portion 18 is provided at the base end portion of the first boss 11 to enlarge the base end surface 17 to stabilize the seating and to increase the welding allowance.

The first boss 11 has a hollow structure. Specifically, the first boss 11 has a hollow hole 19 extending from its base end surface 17 toward the tip end side along the boss central axis C1. The end portion of the hollow hole 19 on the proximal end side is opened at the position of the proximal end surface 17. As a result, the contact area between the base end surface 17 and the outer peripheral surface 4 is reduced, and the amount of heat transfer from the catalyst casing 1 to the first boss 11 can be minimized. The end of the hollow hole 19 on the distal end side is closed.

A first flange 21 for fixing the first bracket 13 by welding is provided at the tip of the first boss 11. The first flange 21 has a larger diameter than the intermediate portion 22 of the first boss 11. The first flange 21 has a horizontally long oval shape, the width W1 in the front-rear direction is made larger than the height H1 in the up-down direction, and the first flange 21 protrudes greatly in the front-rear direction from the intermediate portion 22. As shown in FIG. 3, the height H1 is slightly larger than the outer diameter of the intermediate portion 22. The tip surface 23 of the first boss 11 to the first flange 21 is a flat surface.

FIG. 4 is an IV-IV cross-sectional view of FIG. 2 cut at the position of the second boss 12 in the axial direction. This structure is also similar to the structure in the case of the first boss 11.

As shown in the figure, the base end surface 27 of the second boss 12 is seated on the outer peripheral surface 4 of the catalyst casing 1. Then, in that state, the base end portion of the second boss 12 and the outer peripheral surface 4 of the catalyst casing 1 are fixed by welding. A flange portion 28 is provided at the base end portion of the second boss 12 to enlarge the base end surface 27 to stabilize the seating and to increase the welding allowance.

The second boss 12 has a hollow structure. Specifically, the second boss 12 has a hollow hole 29 extending from its base end surface 27 toward the tip end side along the boss central axis C2. The end portion of the hollow hole 29 on the proximal end side is opened at the position of the proximal end surface 27. As a result, the contact area between the base end surface 27 and the outer peripheral surface 4 is reduced, and the amount of heat transfer from the catalyst casing 1 to the second boss 12 can be minimized. The end of the hollow hole 29 on the distal end side is closed.

A second flange 31 for fixing the first bracket 13 by welding is provided at the tip of the second boss 12. The second flange 31 has a larger diameter than the intermediate portion 32 of the second boss 12. The second flange 31 has a vertically long oval shape, the height H2 in the vertical direction is larger than the width W2 in the front-rear direction, and the second flange 31 protrudes greatly in the vertical direction from the intermediate portion 32. The width W2 is slightly larger than the outer diameter of the intermediate portion 32. The tip surface 33 of the second boss 12 to the second flange 31 is a flat surface.

The first bracket 13 is fixed to the tip portions of the first boss 11 and the second boss 12. When the first bracket 13 is fixed, the heat protector 6 is arranged at a position between the catalyst casing 1 and the first bracket 13 in the radial direction. The first bracket 13 is radially outwardly separated from the heat protector 6 and is arranged in a floating state.

The first bracket 13 is made of a metal such as aluminum, and is integrally formed by pressing a sheet metal. As shown in FIG. 1, the overall shape of the first bracket 13 is a horizontally long square frame, and each side of the square frame has a U-shaped or U-shaped cross section, which makes it possible to reduce the weight and increase the rigidity. Has been done. Further, the first bracket 13 has a substantially L-shape when viewed from the front. A recess 41 is formed in the central portion of the upper and lower sides of the first bracket 13.

Further, on the front side portion of the first bracket 13, a first fixing portion 42 that is seated and fixed on the tip surface 23 of the first boss 11 is formed. The first fixing portion 42 is provided with a horizontally elongated circular hole, that is, a first hole 43, which is one size smaller than the first flange 21 of the first boss 11.

When fixing the first bracket 13 to the first boss 11, the first bracket 13 is seated and positioned on the first boss 11 so that the first hole 43 is coaxial with the tip surface 23 of the first flange 21. Will be done. Then, in this state, the inner peripheral edge of the first hole 43 and the tip surface 23 of the first flange 21 are fillet welded all around. Since the welding rod can be inserted into the first hole 43 from the outer side in the radial direction of the first bracket 13 to perform welding, the welding work can be performed easily and reliably.

The same applies to the second boss 12 side. A second fixing portion 44 to be fixed on the tip surface 33 of the second boss 12 is formed on the rear side portion of the first bracket 13. The second fixing portion 44 is provided with a horizontally elongated circular hole, that is, a second hole 45, which is one size smaller than the second flange 31 of the second boss 12.

When fixing the first bracket 13 to the second boss 12, the first bracket 13 is seated and positioned on the second boss 12 so that the second hole 45 is coaxial with the tip surface 33 of the second flange 31. .. Then, in this state, the inner peripheral edge of the second hole 45 and the tip surface 33 of the second flange 31 are fillet welded all around. Since the welding rod can be inserted into the second hole 45 from the outer side in the radial direction of the first bracket 13 to perform welding, the welding work can be performed easily and reliably.

At the same time, as shown in FIG. 1, a plurality of (two in this embodiment) male screw shafts 46 projecting outward in the radial direction are fixedly provided on the first bracket 13. By tightening nuts (not shown) on these male screw shafts 46, the first electronic device E1 is detachably attached to the first bracket 13 as shown in FIGS. 3 and 4. The first electronic device E1 of the present embodiment is an electronic control unit (ECU (Electronic Control Unit)) for controlling a PM sensor that detects particulate matter (PM (Particulate Matter)) in the exhaust. However, the type of the first electronic device E1 is arbitrary, and may be, for example, the sensor itself or another type of ECU.

The mounting method of the first electronic device E1 can also be changed. For example, the first electronic device E1 may be attached by providing a plurality of nuts or female screw holes in the first bracket 13 and tightening screws in these holes.

The male screw shaft 46 on the front side protrudes from the screw boss 47 fixed to the first fixing portion 42. Further, the male screw shaft 46 on the rear side protrudes from the screw bracket 48 fixed to the upper side portion of the first bracket 13.

The second bracket 14 is overlapped and fixed to the first bracket 13 from the outside in the radial direction. The second bracket 14 of the present embodiment is fixed not only to the first bracket 13 but also to the heat protector 6.

The second bracket 14 is made of a metal such as stainless steel, and is integrally formed by pressing a sheet metal. The second bracket 14 is made larger than the first bracket 13 and has a size that almost completely covers the first bracket 13. A recess 51 such as the recess 41 is also formed in the front-rear center portion of the second bracket 14.

On the front side of the second bracket 14, a first fixing portion 52 is formed so as to be overlapped with the first fixing portion 42 of the first bracket 13. The first fixed portion 52 is provided with a first window 53. A male screw shaft 46 and a screw boss 47 on the front side are inserted into the first window 53.

In particular, the first window 53 is the entire surface (referred to as the back surface portion of the first boss, indicated by the area A1) 49 of the first bracket 13 located just behind the surface of the first bracket 11 with which the tip surface 23 of the first boss 11 contacts. Is exposed to the outside. As a result, the heat transferred from the catalyst casing 1 to the first bracket 13 through the first boss 11 is immediately released into the outside air, and the first bracket 13 and the second bracket 14 become hot due to the heat. Can be suppressed.

The peripheral portion of the first window 53 is fillet welded to the first fixing portion 42 of the first bracket 13, so that the second bracket 14 is fixed to the first bracket 13. The first window 53 has a shape that is a combination of a circle that is one size larger than the screw boss 47 and a horizontally oblong circle that is one size larger than the tip surface 23 of the first boss 11. Since the welding rod can be inserted into the first window 53 from the outside in the radial direction of the second bracket 14 to perform welding, the welding work can be performed easily and reliably.

Similarly, a second fixing portion 54 to be overlapped with the second fixing portion 44 of the first bracket 13 is formed on the rear side of the second bracket 14. The second fixed portion 54 is provided with a second window 55. The second window 55 is a vertically elongated circle that is one size larger than the second hole 45.

The second window 55 covers the entire surface (referred to as the back surface portion of the second boss, indicated by the area A2) 59 of the first bracket 13 located just behind the surface with which the tip surface 33 of the second boss 12 contacts. Expose to the outside. As a result, the heat transferred from the catalyst casing 1 to the first bracket 13 through the second boss 12 is immediately released into the outside air, and the first bracket 13 and the second bracket 14 become hot due to the heat. Can be suppressed.

The peripheral edge of the second window 55 is also fillet welded to the second fixing portion 44 of the first bracket 13. As a result, the second bracket 14 is fixed to the first bracket 13. Since a welding rod can be inserted into the second window 55 from the outside in the radial direction of the second bracket 14 to perform welding, welding work can be performed easily and reliably.

The second bracket 14 is also provided with an opening 61 through which the male screw shaft 46 and the screw bracket 48 on the rear side of the first bracket 13 are inserted.

A plurality of (two in this embodiment) male screw shafts 56 protruding outward in the radial direction are fixedly provided on the second bracket 14. By tightening nuts (not shown) on these male screw shafts 56, the second electronic device E2 is detachably attached to the second bracket 14 as shown in FIGS. 3 and 4. The second electronic device E2 of the present embodiment is an ECU for controlling a NOx sensor that detects the NOx (nitrogen oxide) concentration of the exhaust gas. However, the type of the second electronic device E2 is also arbitrary, and may be, for example, the sensor itself or another type of ECU.

The mounting method of the second electronic device E2 can also be changed. For example, the second bracket 14 may be provided with a plurality of nuts or female screw holes, and the second electronic device E2 may be attached by tightening the screws.

The second electronic device E2 is mounted close to above the first electronic device E1. Further, both the first electronic device E1 and the second electronic device E2 are directed outward in the radial direction.

The second bracket 14 has an extension portion 62 extending toward the upper end side in the circumferential direction with respect to the first bracket 13. The tip portion 63 of the extension portion 62 is seated on the outer peripheral surface of the split piece 7 forming the heat protector 6, and is fixed to the outer peripheral surface by welding.

The second bracket 14 also has a downward extending portion 64 extending toward the lower end side in the circumferential direction with respect to the first bracket 13. The tip portion 65 of the lower extension portion 64 is seated on the outer peripheral surface of the split piece 7 forming the heat protector 6, and is fixed to the outer peripheral surface by welding.

In this way, the second bracket 14 is fixed not only to the first bracket 13 but also to the heat protector 6. Further, the second bracket 14 is fixed to the heat protector 6 at both ends in the circumferential direction.

Next, the advantages of this embodiment will be described.

In the present embodiment, the bosses 11 and 12 are fixed to the catalyst casing 1, the first bracket 13 is fixed to the bosses 11 and 12, and the first electronic device E1 is attached to the first bracket 13. Therefore, as compared with the case where the first bracket 13 is directly fixed to the catalyst casing 1 (referred to as the case of the comparative example), the amount of heat transferred from the catalyst casing 1 to the first bracket 13 can be reduced, and the first electronic device E1 due to heat can be reduced. Damage can be suppressed.

In particular, the sizes of the bosses 11 and 12 are small, and the contact area of the bosses 11 and 12 with respect to the catalyst casing 1 is small. Therefore, the amount of heat transferred from the catalyst casing 1 to the bosses 11 and 12 is small, and the amount of heat transferred from the bosses 11 and 12 to the first bracket 13 is also small. Therefore, the amount of heat transferred to the first bracket 13 can be reduced, and damage to the first electronic device E1 due to heat from the first bracket 13 can be suppressed.

Further, in the present embodiment, the bosses 11 and 12 have a hollow structure. Therefore, the amount of heat flowing through the bosses 11 and 12 itself can be reduced, and as a result, the amount of heat transferred to the first bracket 13 can be further reduced.

Further, in the present embodiment, hollow holes 19 and 29 are provided in the bosses 11 and 12, and the hollow structure is achieved by the hollow holes 19 and 29. By doing so, the contact area of the base end surfaces 17 and 27 of the bosses 11 and 12 with respect to the catalyst casing 1 can be reduced, the amount of heat transferred from the catalyst casing 1 to the bosses 11 and 12, and the amount of heat transferred to the first bracket 13. Can be reduced. In addition, since the hollow holes 19 and 29 can be formed by an easy method such as machining, the hollow structure can be achieved by an easy method.

By the way, the vibration from the engine, the road surface, or the like is transmitted from the catalyst casing 1 to the first bracket 13 through the bosses 11 and 12. If the rigidity of the bosses 11 and 12 is low, the first bracket 13 resonates and its vibration becomes large, and the vibration of the first bracket 13 may damage the first electronic device E1.

In the present embodiment, since the bosses 11 and 12 have a hollow structure, the rigidity of the bosses 11 and 12 can be sufficiently secured while suppressing the amount of heat transfer to the first bracket 13 as described above. Therefore, it is possible to suppress the resonance of the first bracket 13 and suppress the damage of the first electronic device E1 due to the vibration of the first bracket 13.

Further, in the present embodiment, since the second bracket 14 is fixed to the first bracket 13, the second electronic device E2 can be attached by using the second bracket 14. Since the second bracket 14 is made larger than the first bracket 13, the area of the entire bracket can be expanded and the number of electronic devices that can be attached can be increased.

Further, in the present embodiment, the second bracket 14 is also fixed to the heat protector 6. Therefore, the support rigidity of the second bracket 14 can be improved to stably support the second electronic device E2.

On the other hand, when the second bracket 14 is fixed to the heat protector 6, the vibration of the heat protector 6 may be transmitted to the second bracket 14 to vibrate the second electronic device E2. However, in the present embodiment, the second bracket 14 is provided with the upper extension portion 62 and the lower extension portion 64 extending to both ends in the circumferential direction, and the upper extension portion 62 and the lower extension portion 64 are fixed to the heat protector 6. Therefore, the vibration transmission path from the fixed position to the second electronic device E2 can be lengthened, and the influence on the second electronic device E2 can be minimized.

Further, in the present embodiment, the first window 53 is formed on the second bracket 14 so as to expose the back surface portion 49 of the first boss of the first bracket 13 to the outside. Therefore, the heat transferred from the catalyst casing 1 to the first bracket 13 through the first boss 11 is immediately released into the outside air, and the first bracket 13 and the second bracket 14 are suppressed from becoming hot due to the heat. can. Therefore, it is possible to prevent the first electronic device E1 and the second electronic device E2 from being damaged by heat.

Similarly, in the present embodiment, the second window 55 is formed on the second bracket 14 so as to expose the second boss back surface portion 59 of the second bracket 14 to the outside. Therefore, the heat transferred from the catalyst casing 1 to the first bracket 13 through the second boss 12 is immediately released into the outside air, and the first bracket 13 and the second bracket 14 are suppressed from becoming hot due to the heat. can. Therefore, it is possible to prevent the first electronic device E1 and the second electronic device E2 from being damaged by heat.

Further, in the present embodiment, the directions of the first flange 21 of the first boss 11 and the second flange 31 of the second boss 12 are changed, the former is a horizontally long shape extending in the axial direction, and the latter is in the direction perpendicular to the axial direction. It has a vertically long shape that extends. Therefore, the support rigidity of the first bracket 13 and the second bracket 14 can be improved in both the axial direction and the direction perpendicular to the axial direction.

Although the embodiments of the present disclosure have been described in detail above, various embodiments and variations of the present disclosure can be considered.

(1) For example, in the above embodiment, the number of bosses is two, but the number of bosses can be changed. The number of bosses may be one or three or more.

(2) In the above embodiment, the bosses 11 and 12 have a hollow structure by providing the hollow holes 19 and 29, but the bosses 11 and 12 may have a hollow structure by another method. For example, the bosses 11 and 12 may be made of a porous material to form a hollow structure.

(3) Each fixing portion in the embodiment may be fixed by a method other than welding, for example, bolting, riveting, or the like.

(4) In the above embodiment, the first window 53 is formed so as to expose the entire back surface portion 49 of the first boss to the outside. However, if possible, the first window 53 may be formed so as to expose only a part of the back surface portion 49 of the first boss to the outside. The same applies to the second window 55.

The configurations of the above-described embodiments and modifications can be partially or wholly combined, as long as there is no particular contradiction. The embodiments of the present disclosure are not limited to the above-described embodiments, and all modifications, applications, and equivalents included in the ideas of the present disclosure defined by the scope of claims are included in the present disclosure. Therefore, this disclosure should not be construed in a limited way and may be applied to any other technique that falls within the scope of the ideas of this disclosure.

1 Catalyst casing 6 Heat protector 11 1st boss 12 2nd boss 13 1st bracket 14 2nd bracket 17,27 Base end faces 19, 29 Hollow holes E1 1st electronic device E2 2nd electronic device

Claims (5)

It is a mounting structure for mounting electronic devices on the catalyst casing.
A boss whose base end is fixed to the catalyst casing,
A plate-shaped bracket fixed to the tip of the boss and to which the electronic device is attached,
An electronic device mounting structure characterized by being provided with. The mounting structure for an electronic device according to claim 1, wherein the boss has a hollow structure. The mounting structure for an electronic device according to claim 1 or 2, wherein the boss has a hollow hole extending from its base end surface to the tip end side. The mounting structure for an electronic device according to any one of claims 1 to 3, further comprising another plate-shaped bracket that is fixed to the bracket and to which another electronic device is mounted. A heat protector located between the catalyst casing and the bracket and covering the catalyst casing is provided.
The mounting structure for an electronic device according to claim 4, wherein the other bracket is also fixed to the heat protector.

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