CN111425287A - Mounting part structure of exhaust pipe trimmer - Google Patents
Mounting part structure of exhaust pipe trimmer Download PDFInfo
- Publication number
- CN111425287A CN111425287A CN201911347063.3A CN201911347063A CN111425287A CN 111425287 A CN111425287 A CN 111425287A CN 201911347063 A CN201911347063 A CN 201911347063A CN 111425287 A CN111425287 A CN 111425287A
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- CN
- China
- Prior art keywords
- exhaust pipe
- dresser
- cover member
- rear bumper
- exhaust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Connection Of Plates (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention provides a mounting portion structure of an exhaust pipe dresser, which can assemble the exhaust pipe dresser and a covering member on the front surface of a rear bumper with high precision without increasing the number of components and can inhibit heat conduction from the rear end portion of the exhaust pipe dresser to the front surface of the rear bumper. The mounting structure of an exhaust pipe dresser is provided with a rear bumper front face (10), an exhaust pipe (12), an exhaust pipe dresser (15), and a cover member (14). The exhaust pipe dresser (15) is positioned and fixed to the cover member (14) with a predetermined gap between the outer peripheral surface of the rear end portion and the insertion hole of the cover member (14). The cover member (14) is attached to the rear bumper face (10).
Description
Technical Field
The present invention relates to a mounting structure of an exhaust pipe dresser (exhaust pipe dresser) for a vehicle, which guides exhaust gas discharged from an exhaust pipe to the rear of a front surface (rear bumper face) of a rear bumper.
Background
As a structure of a rear portion of a vehicle, a structure is known in which exhaust gas discharged from an exhaust pipe is guided to a vehicle rear side through an exhaust pipe dresser (for example, see patent document 1).
In the mounting structure of an exhaust pipe dresser of patent document 1 (japanese patent No. 5347796), an exhaust port penetrating in the vehicle body longitudinal direction is provided in the front surface of a rear bumper at the rear portion of the vehicle body, and a substantially cylindrical exhaust pipe dresser (extension portion) is mounted via a bracket to the front surface side of the front surface of the rear bumper. The exhaust pipe trimmer has a front portion through which a terminal end portion of the exhaust pipe is inserted, and a rear end portion through which a rear end portion of the exhaust pipe trimmer is inserted through an exhaust port in a front surface of the rear bumper. A cover member (flap) is attached to an inner peripheral edge portion of the exhaust port on the front surface of the rear bumper. An opening is formed in the cover member so as to face the rear end portion of the exhaust pipe dresser. Exhaust gas discharged from the exhaust pipe passes through the inside of the exhaust pipe dresser and is discharged to the rear of the front face of the rear bumper through the opening portion of the cover member.
Disclosure of Invention
Summary of The Invention
Problems to be solved by the invention
However, in the mounting structure of the exhaust pipe dresser of patent document 1, since the exhaust pipe dresser is mounted to the front surface of the rear bumper via a bracket as another member, the number of parts is increased, and the manufacturing cost is likely to increase.
In the mounting structure of the exhaust pipe dresser of patent document 1, since the exhaust pipe dresser and the cover member are mounted separately on the front surface of the rear bumper, it is difficult to improve the assembly accuracy of the exhaust pipe dresser and the cover member (management of the gap therebetween). Therefore, it is difficult to ensure the relative position between the opening of the cover member and the rear end portion of the exhaust pipe dresser (the relative position in the vehicle body front-rear direction and the vehicle body vertical and horizontal direction) with high accuracy, and the appearance from the outside of the vehicle may be degraded.
Further, in the mounting portion structure of the exhaust pipe dresser of patent document 1, it is difficult to ensure a gap between the opening portion of the cover member and the rear end portion of the exhaust pipe dresser with high accuracy, and therefore, when the rear end portion of the exhaust pipe dresser comes into contact with or approaches the cover member, the heat of the exhaust gas is transmitted to the vehicle exterior side surface on the front surface of the rear bumper via the cover member.
Accordingly, the present invention is directed to provide a mounting portion structure of an exhaust pipe dresser, which can accurately assemble the exhaust pipe dresser and a cover member to a front surface of a rear bumper without increasing the number of parts, and which can suppress heat conduction from a rear end portion of the exhaust pipe dresser to the front surface of the rear bumper.
Means for solving the problems
An exhaust pipe dresser mounting portion structure according to an aspect of the present invention employs the following structure.
That is, the mounting portion structure of the exhaust pipe dresser is characterized by including: a rear bumper face (for example, a rear bumper face 10 of the embodiment) disposed at a rear portion of the vehicle body and having an exhaust port (for example, an exhaust port 11 of the embodiment) penetrating in a front-rear direction of the vehicle body; an exhaust pipe (e.g., exhaust pipe 12 of the embodiment) that discharges exhaust gas; an exhaust pipe dresser (for example, an exhaust pipe dresser 15 of the embodiment) that guides exhaust gas discharged from the exhaust pipe to the rear of the front face of the rear bumper; and a covering member (for example, a covering member 14 according to an embodiment) that has an insertion hole (for example, an insertion hole 17 according to an embodiment) through which a rear end portion of the exhaust pipe dresser is inserted, and that covers an inner peripheral edge portion of the exhaust port, wherein the exhaust pipe dresser is positioned and fixed to the covering member with a predetermined gap between an outer peripheral surface of the rear end portion and the insertion hole, and the covering member is attached to a front surface of the rear bumper.
With the above-described structure, the exhaust pipe dresser is integrally fixed to the cover member in a positioned state. The exhaust pipe dresser is attached to the front surface of the rear bumper via the cover member in this state. Therefore, when the present mounting portion structure is adopted, the exhaust pipe dresser can be mounted to the front surface of the rear bumper with high accuracy without using a bracket or the like as another member. Therefore, when this configuration is adopted, the number of components can be reduced, and the product cost can be reduced.
In addition, in the present structure, since the exhaust pipe dresser and the cover member are directly positioned and fixed, the accuracy of assembling the exhaust pipe dresser and the cover member is improved. Therefore, the relative position of the insertion hole of the cover member and the rear end portion of the exhaust pipe dresser can be kept constant with high accuracy. Therefore, the appearance of the vehicle exterior can be improved by adopting the present configuration.
Further, in the present structure, the gap between the insertion hole of the cover member and the rear end portion of the exhaust pipe dresser can be kept constant with high accuracy. Therefore, the heat of the exhaust pipe dresser heated by the exhaust gas is difficult to be transmitted to the vehicle exterior side surface of the front surface of the rear bumper through the covering member.
The following structure is possible: the positioning and fixing portion of the exhaust pipe dresser and the cover member has a first position adjustment portion (for example, the first rib 32, the second rib 33, and the third rib 34 in the embodiment) that can adjust the relative position of the exhaust pipe dresser and the cover member.
In this case, the relative position of the exhaust pipe dresser and the cover member is appropriately adjusted by the first position adjustment portion, and the exhaust pipe dresser and the cover member are fixed in this state, whereby the assembly accuracy between the exhaust pipe dresser and the cover member can be improved.
The following structure is possible: the positioning fixing portion includes a protruding piece (for example, a first protruding piece 28A and a second protruding piece 28B of the embodiment) that protrudes from the covering member and has a mounting hole (for example, a mounting hole 29 of the embodiment) that penetrates in the vertical direction, and a fastening member (for example, a shoulder bolt 30 of the embodiment) that is inserted into the mounting hole and fastens and fixes the covering member to the exhaust pipe dresser, and the first position adjustment portion includes a first rib (for example, a first rib 32 of the embodiment) that protrudes from an inner surface of the mounting hole and restricts displacement of the fastening member in a direction orthogonal to the axial direction of the fastening member.
In this case, the position of the fastening member in the mounting hole in the direction can be finely adjusted by changing the protruding height of the first rib by, for example, adjusting the die surface of a forming die for shaping the exhaust pipe dresser. When the position of the fastening member in one direction in the mounting hole is adjusted, the relative position of the exhaust pipe dresser and the cover member in one direction is also changed in association therewith.
The following structure is possible: the first position adjustment portion has a second rib (for example, a second rib 33 of the embodiment) that is provided protruding from an inner surface of the mounting hole and restricts displacement of the fastening member in another direction orthogonal to the axial direction of the fastening member.
In this case, the position of the fastening member in the other direction in the mounting hole can be finely adjusted by changing the protruding height of the second rib by, for example, adjusting the die surface of a forming die for shaping the exhaust pipe dresser. When the position of the fastening member in the other direction in the mounting hole is adjusted, the relative position of the exhaust pipe dresser and the cover member in the other direction is also changed in association therewith.
Preferably, the one direction is a direction orthogonal to a tangent line (for example, a tangent line T of the embodiment) of a circular arc shape at an arbitrary position on a rear outer surface of the horizontal cross section of the rear bumper face, and the other direction is a direction along the tangent line.
In this case, by adjusting the projecting heights of the first rib and the second rib, the relative positions of the exhaust pipe dresser and the cover member in the horizontal direction can be adjusted, and the exhaust pipe dresser can be easily adjusted in position with respect to the arc-shaped rear outer surface of the horizontal cross section of the front surface of the rear bumper.
The following structure is possible: the first position adjustment portion has a third rib (for example, a third rib 34 of the embodiment) that is provided so as to protrude from an opposing surface of the protruding piece that opposes the exhaust pipe dresser in the up-down direction.
In this case, the height of the opposing surface of the protruding piece can be finely adjusted by changing the protruding height of the third rib by, for example, adjusting the die surface of a forming die for shaping the exhaust pipe dresser. When the height of the opposing surface of the protruding piece is adjusted, the relative position in the vertical direction of the exhaust pipe dresser and the cover member is also changed in accordance therewith.
The rear end portion of the exhaust pipe dresser may be constituted by an annular wall having a hollow portion (for example, the hollow portion 50 of the embodiment).
In this case, since the wall of the rear end portion of the exhaust pipe dresser has a hollow portion, the hollow portion functions as a heat insulating layer. Therefore, the heat of the exhaust gas passing through the inside of the exhaust pipe dresser is difficult to be transmitted to the cover member side. In the present configuration, the wall of the rear end portion of the exhaust pipe dresser has a hollow portion, and therefore the wall of the rear end portion is thick. Therefore, the gap between the insertion hole of the cover member and the rear end portion of the exhaust pipe dresser is no longer conspicuous in a vehicle rear view. Therefore, the appearance of the vehicle viewed from the rear of the vehicle is improved by adopting the present configuration.
The rear end portion of the exhaust pipe dresser may be configured by a pair of branch cylinders (for example, the branch cylinder 15B of the embodiment) that branch into two branches to the left and right, the cover member may have a partition wall (for example, the partition wall 18 of the embodiment) that partitions the insertion hole into left and right branch hole portions (for example, the branch hole portion 17a of the embodiment), the branch cylinder corresponding to the rear end portion may be inserted into each of the branch hole portions, and the cover member may be locked to an edge portion of the exhaust port on the front surface of the rear bumper at upper and lower positions of the partition wall.
In this case, since the cover member is locked to the front surface of the rear bumper at the upper and lower positions of the partition wall, the upper and lower edges of the exhaust port in the front surface of the rear bumper are supported by the partition wall. Therefore, the exhaust port on the front surface of the rear bumper is less likely to deform vertically.
The partition wall may be formed such that the width in the left-right direction gradually increases from the central region in the up-down direction toward each of the upper and lower end portions.
In this case, the partition wall can effectively receive a vertical load acting on the central region in the left-right direction of the insertion hole.
A flange portion (for example, an inner flange portion 14b in the embodiment) extending toward the vehicle front side with respect to the vehicle exterior side surface of the covering member may be provided at an opening edge portion of the insertion hole of the covering member.
In this case, the flange portion increases the rigidity of the peripheral edge portion of the insertion hole, and the peripheral edge portion of the insertion hole is less likely to deform.
A fitting wall (for example, a fitting wall 11a according to the embodiment) extending toward the front side of the vehicle body may be formed on an inner peripheral edge portion of the exhaust port on the front surface of the rear bumper, a fitting groove (for example, a fitting groove 19 according to the embodiment) into which the fitting wall is fitted from the rear side of the vehicle body may be formed on an outer edge portion of the insertion hole of the cover member, and second position adjusting portions (for example, position adjusting ribs 20 and 21 according to the embodiment) capable of adjusting relative positions of the fitting wall and the fitting groove may be provided between the fitting wall and the fitting groove.
In this case, the covering member can be assembled to the exhaust port on the front surface of the rear bumper with high accuracy by appropriately adjusting the relative positions of the fitting wall and the fitting groove by the second position adjusting portion and fixing the front surface of the rear bumper and the covering member in this state.
Effects of the invention
In the aspect of the present invention, since the exhaust pipe dresser is positioned and fixed to the cover member and the cover member is attached to the front surface of the rear bumper, it is possible to improve the accuracy of assembling the exhaust pipe dresser and the cover member while suppressing an increase in the number of parts as compared with a case where the exhaust pipe dresser is attached to the front surface of the rear bumper via a bracket or the like as another member. Therefore, according to the present invention, the exhaust pipe dresser and the cover member can be assembled to the front surface of the rear bumper with high accuracy without increasing the number of components.
In addition, in the aspect of the present invention, the gap between the insertion hole of the cover member and the rear end portion of the exhaust pipe dresser can be kept constant with high accuracy, and therefore heat conduction from the rear end portion of the exhaust pipe dresser to the front face of the rear bumper can be suppressed.
Drawings
Fig. 1 is a rear view of the vehicle of the embodiment.
Fig. 2 is a bottom view of the rear portion of the vehicle of the embodiment.
Fig. 3 is a perspective view of a mounting portion of an exhaust pipe dresser in an embodiment.
Fig. 4 is a perspective view of the front of the rear bumper to which the covering member of the embodiment is attached.
Fig. 5 is a sectional view taken along line V-V of fig. 3.
Fig. 6 is an enlarged sectional view taken along line VI-VI of fig. 1.
Fig. 7 is a partial cutaway perspective view of the cover member and the front of the rear bumper of the embodiment.
Fig. 8 is a sectional view taken along line VIII-VIII of fig. 3.
Fig. 9A to B are views collectively showing an enlarged view (a) of the IXa portion of fig. 8 and an enlarged view (B) of the IXb portion of fig. 8.
Fig. 10 is an X-direction view of fig. 4.
Fig. 11 is a cross-sectional view taken along line XI-XI of fig. 3 with a part of the component removed.
Fig. 12A to C are sectional views for explaining adjustment of the relative position of the cover member and the exhaust pipe dresser.
Description of the reference numerals
10 … front bumper
11 … air outlet
11a … fitting wall
12 … exhaust pipe
14 … covering member
14b … inner flange part (flange part)
15 … exhaust pipe dresser
15B … branch cylinder
17 … through hole
17a … branch hole part
18 … partition wall
19 … fitting groove
20. 21 … position adjustment rib (second position adjustment part)
28A … first Tab (Tab)
28B … second Tab (Tab)
29 … mounting hole
30 … shoulder bolt
32 … first rib
33 … second Rib
34 … third Rib
50 … hollow part
Tangent line of T …
Detailed Description
In the drawings, arrow FR indicates the front of vehicle 1, arrow UP indicates the upper side of vehicle 1, and arrow L H indicates the left side of the vehicle.
Fig. 1 is a rear view of a vehicle 1 of the embodiment, and fig. 2 is a bottom view of a rear portion of the vehicle 1 of the embodiment. In fig. 1 and 2, some components are omitted.
A resin rear bumper face 10 is attached to a rear portion of the vehicle so as to cover a lower rear surface of the vehicle body. The rear bumper face 10 extends in the vehicle width direction, and left and right edge portions thereof extend gently curved toward the vehicle body front side. Laterally long substantially rectangular exhaust ports 11 penetrating in the vehicle body longitudinal direction are formed in the left and right edges of the rear bumper face 10.
An exhaust pipe 12 connected to an unillustrated internal combustion engine is provided below the vehicle body. As shown in fig. 2, the exhaust pipe 12 extends from the internal combustion engine at the front portion of the vehicle body toward the rear side of the vehicle body, and branches off to the left and right in the vehicle width direction at the rear portion of the vehicle body. A muffler 13 is interposed between the left and right branch pipes 12A of the exhaust pipe 12, and terminal portions 12Aa of the branch pipes 12A extending from the muffler 13 are directed toward the left and right exhaust ports 11 of the rear bumper face 10. A metal exhaust pipe dresser 15 is attached to the left and right exhaust ports 11 of the rear bumper face 10 via a resin cover member 14 that covers the inner peripheral edge portions of the exhaust ports 11. The exhaust pipe dresser 15 is formed in a substantially cylindrical shape, and guides the exhaust gas discharged from the exhaust pipe 12 (branch pipe 12A) to the rear of the rear bumper face 10.
Fig. 3 is a view showing the mounting portion of the exhaust pipe dresser 15 on the left side of the vehicle, and the mounting portion of the exhaust pipe dresser 15 is viewed from the front right above the vehicle. Fig. 4 is a view showing a state in which the cover member 14 is attached to the left side portion of the rear bumper face 10, and is a view of the attachment portion of the cover member 14 as viewed from above the front of the vehicle. Fig. 5 is a sectional view taken along line V-V of fig. 3.
The left and right mounting portions of the exhaust pipe dresser 15 are formed in a left-right substantially symmetrical shape, but have the same basic configuration. Although the mounting portion will be described below with reference to the drawings showing the mounting portion of the exhaust pipe dresser 15 on the left side, the mounting portion on the right side has the same configuration.
The exhaust pipe dresser 15 is provided with a pair of branch pipes 15B connected to a rear portion of a main pipe 15A into which a terminal portion 12Aa of the exhaust pipe 12 (branch pipe 12A) is inserted. The main tube 15A is formed in a substantially fan-shaped plan view whose width gradually expands from the distal end portion toward the rear side in plan view. The pair of branch tubes 15B branch off from the front end of the main tube 15A into two forks. The exhaust gas discharged from the terminal end portion 12Aa of the exhaust pipe 12 is introduced into the main cylinder 15A, passes through the left and right branch cylinders 15B, and is discharged to the vehicle rear side. Further, a connecting piece 16 fastened and fixed to the cover member 14 is welded and fixed to each upper surface of the left and right branch tubes 15B.
The covering member 14 has: a horizontally long rectangular frame-shaped base wall 14 a; an inner flange portion 14b (flange portion) extending by being bent from the inner peripheral edge portion of the base wall 14a toward the vehicle body front side; an outer flange portion 14c extending from the outer peripheral edge portion of the base wall 14a to be bent toward the vehicle body front side; a first bumper fixing piece 14d extending from an extending end of the outer side flange portion 14c on the upper side while being bent toward the vehicle body upper side; and a second bumper fixing piece 14e bent in a step-like manner from an extending end of the outer flange portion 14c on the lower side and extending toward the front side of the vehicle body.
Fig. 6 is an enlarged sectional view taken along line VI-VI of fig. 1, and fig. 7 is a partial sectional perspective view of the cover member 14 and the rear bumper face 10, in which the vicinity of the section of fig. 6 is formed into the same section.
The base wall 14a of the cover member 14 is a wall that faces the vehicle body rear side over substantially the entire area in a state where the cover member 14 is attached to the rear bumper face 10. The inner peripheral surfaces of the base wall 14a and the inner flange portion 14B serve as insertion holes 17 through which the rear end portion (branch cylinder 15B) of the exhaust pipe dresser 15 is inserted.
As shown in fig. 3 to 5, a partition wall 18 that connects the upper and lower sides of the base wall 14a in the width direction is provided in series. The partition wall 18 partitions the inside of the insertion hole 17 into left and right sides, and divides the inside of the insertion hole 17 into left and right branch hole portions 17 a. The branch pipes 15B of the exhaust pipe dresser 15 corresponding to the left and right sides are inserted into the left and right branch hole portions 17a with a predetermined gap h1 (see fig. 6). As shown in fig. 4, the partition wall 18 is formed such that the width in the left-right direction gradually increases from the central region in the up-down direction toward each end portion in the up-down direction.
The partition wall 18 is formed to bulge in a flange shape toward the vehicle body front side so as to have an upper side and a lower side that connect the base wall 14a with high rigidity. The partition wall 18 is formed to be thick in the vehicle body longitudinal direction so as to be continuous with the inner flange portions 14b of the upper and lower sides.
As shown in fig. 6 and 7, a fitting wall 11a that extends while being bent toward the vehicle body front side is formed at the inner peripheral edge portion of the exhaust port 11 of the rear bumper face 10. The fitting wall 11a is formed over substantially the entire peripheral region of the exhaust port 11. On the other hand, a fitting groove 19 recessed toward the vehicle body front side is formed in an edge portion of the base wall 14a of the cover member 14 near the inner periphery (outer edge portion of the insertion hole 17). The fitting wall 11a of the rear bumper face 10 is fitted into the fitting groove 19. An inner region of the base wall 14a on the inner side of the fitting groove 19 serves as a covering surface 14a-1 that passes through the exhaust port 11 of the rear bumper face 10 and is exposed to the vehicle body rear side.
A position adjustment rib 20 (vertical rib) having a predetermined width extending in the groove width direction of the fitting groove 19 is formed on the bottom wall of the fitting groove 19 of the cover member 14. A position adjustment rib 21 (lateral rib) having a predetermined width extending in the extending direction of the fitting groove 19 is formed on a side wall (upper side wall in fig. 6 and 7) of the fitting groove 19. As shown in fig. 6, the position adjustment rib 20 formed on the bottom wall of the fitting groove 19 regulates the relative position in the vehicle body longitudinal direction (the amount of separation d2 in the vehicle body longitudinal direction) between the rear end portion of the exhaust port 11 of the rear bumper face 10 and the covering surface 14a-1 of the covering member 14 by the contact of the end surface of the fitting wall 11a on the rear bumper face 10 side. On the other hand, the position adjustment rib 21 formed on the side wall of the fitting groove 19 limits the gap h2 between the inner surface of the exhaust port 11 of the rear bumper face 10 and the side wall of the fitting groove 19 of the cover member 14 by the contact of the side surface (upper wall surface in fig. 6 and 7) of the fitting wall 11a on the rear bumper face 10 side. When the rear bumper face 10 is die-molded, the projecting height of the position adjustment ribs 20 and 21 can be finely adjusted by changing the depth of the rib forming portion of the die surface of the molding die.
In the present embodiment, the position adjustment ribs 20 and 21 protruding into the fitting groove 19 of the cover member 14 constitute a second position adjustment portion.
As shown in fig. 6, the outer peripheral surface of the branch cylinder 15B of the exhaust pipe dresser 15 is formed to be inclined in a tapered manner toward the front end side. Therefore, when the gap h1 between the insertion hole 17 of the cover member 14 and the branch cylinder 15B is viewed from the rear side, the gap h1 appears to be blocked by the inclined outer peripheral surface of the branch cylinder 15B. Therefore, the inside of the rear bumper face 10 is not visible through the gap h1, and the appearance is improved.
As shown in fig. 6, the branch cylinder 15B (rear end portion) of the exhaust pipe dresser 15 is formed of an annular wall having a hollow portion 50. The hollow portion 50 functions as a heat insulating layer and blocks the transfer of the heat of the exhaust gas transmitted to the inner peripheral side of the branch cylinder 15B (rear end portion) in the direction of the inner flange portion 14B of the cover member 14.
As shown in fig. 3, 4, and the like, a plurality of elongated hole-shaped locking holes 22 are formed in a circumferential region of the base wall 14a of the cover member 14 so as to be separated in the circumferential direction. Two of the plurality of locking holes 22 are formed at upper and lower positions of the partition wall 18. Note that, the locking holes 22 disposed above and below the partition wall 18 are indicated by the symbols 22u and 22l in parentheses for distinction from each other.
On the other hand, a plurality of locking projections 23 projecting toward the vehicle body front side are provided projecting from the end surface of the fitting wall 11a of the rear bumper face 10 in the extending direction. The locking projections 23 are formed in a plate shape at positions corresponding to the locking holes 22 of the cover member 14. The cover member 14 is locked to the rear bumper face 10 in a positioned state by fitting the locking projections 23 corresponding to the locking holes 22. When the locking projections 23 are fitted into the locking holes 22u and 22l at the upper and lower positions of the partition wall 18, the upper and lower portions of the exhaust port 11 on the rear bumper face 10 side are supported by the partition wall 18.
Further, a long-hole-shaped guide hole 24 is formed substantially horizontally in the first bumper fixing piece 14d of the cover member 14. A large guide projection 25 provided to protrude from the front surface of the rear bumper face 10 is inserted into the guide hole 24. The insertion of the guide projection 25 into the guide hole 24 adjusts the assembly posture of the cover member 14 with respect to the rear bumper face 10.
As shown in fig. 3 and 4, locking holes 26 and 27 are formed in the first bumper fixing piece 14d and the second bumper fixing piece 14e of the cover member 14, respectively. Locking members such as clips and bolts, not shown, are inserted into the locking holes 26 and 27, and the cover member 14 is finally locked and fixed to the rear bumper face 10.
Fig. 8 is a sectional view taken along line VIII-VIII of fig. 3. Fig. 9A is an enlarged view of the IXa portion of fig. 8, and fig. 9B is an enlarged view of the IXb portion of fig. 8. Further, fig. 10 is an X-direction view of fig. 4, and fig. 11 is a sectional view taken along line XI-XI of fig. 3 with a part of the components removed.
As shown in fig. 3, 4, and the like, a first protruding piece 28A and a second protruding piece 28B are provided on the base portion side of the first bumper fixing piece 14d of the cover member 14 so as to protrude apart in the vehicle width direction. The first protruding piece 28A protrudes from the right side portion in the vehicle width direction of the base portion of the first bumper fixing piece 14d toward the vehicle body front side, and the second protruding piece 28B protrudes from the left side portion in the vehicle width direction of the base portion of the first bumper fixing piece 14d toward the vehicle body front side. The first protruding piece 28A is overlapped on the upper surface of the connecting piece 16 on the right side of the exhaust pipe dresser 15, and is positioned and fixed to the connecting piece 16 in this state. The second protruding piece 28B is overlapped on the upper surface of the left connecting piece 16 of the exhaust pipe dresser 15, and is positioned and fixed to the connecting piece 16 in this state.
In the present embodiment, the fixing portion between the first projecting piece 28A and the right connecting piece 16 and the fixing portion between the second projecting piece 28B and the left connecting piece 16 constitute the positioning and fixing portion between the cover member 14 and the exhaust pipe dresser 15.
Fig. 12A to C are sectional views of the positioning fixing portion showing the position adjustment of the cover member 14 and the exhaust pipe dresser 15.
As shown in fig. 12A to C, the first protruding piece 28A and the second protruding piece 28B are formed with attachment holes 29 penetrating in the vertical direction. Then, a shoulder bolt 30 (see fig. 3 and 12A to C) as a fastening member is inserted into the mounting hole 29 from above, and a shaft portion of the shoulder bolt 30 is screwed into a weld nut 31 provided on the connecting piece 16. Therefore, the cover member 14 and the exhaust pipe dresser 15 are fixed to each other by screwing the shoulder bolt 30 and the weld nut 31.
In fig. 8 to 11, the shoulder bolt 30 is omitted.
A pair of first ribs 32 are provided so as to protrude from the inner surface of each of the mounting holes 29 of the first protruding piece 28A and the second protruding piece 28B, and the pair of first ribs 32 regulate displacement of the shoulder bolt 30 in a first direction (one direction) orthogonal to the axial direction. A pair of first ribs 32 project in the first direction from opposite positions of the inner surface of the mounting hole 29. Therefore, the end surfaces of the pair of first ribs 32 in the projecting direction face each other in the first direction. The first direction will be described later. The end surfaces of the pair of first ribs 32 in the projecting direction abut against the outer surface of the large-diameter shaft portion of the shoulder bolt 30 in the first direction, thereby restricting the relative position of the shoulder bolt 30 with respect to the first projecting piece 28A and the second projecting piece 28B in the first direction. At this time, the relative positions of the cover member 14 and the exhaust pipe dresser 15 in the first direction are restricted.
A pair of second ribs 33 are further provided projecting from the inner surface of the mounting hole 29 of the first projecting piece 28A, and the pair of second ribs 33 regulate displacement of the shoulder bolt 30 in a second direction (the other direction) orthogonal to the axial direction. A pair of second ribs 33 project in the second direction from opposite positions of the inner surface of the mounting hole 29. The second direction will be described later. The end surfaces of the pair of second ribs 33 in the projecting direction abut against the outer surface of the large-diameter shaft portion of the shoulder bolt 30 in the second direction. Thereby, the relative position of the shoulder bolt 30 with respect to the first protruding piece 28A in the second direction is restricted, and as a result, the relative position of the cover member 14 and the exhaust pipe dresser 15 in the second direction is also restricted. The second rib 33 is not provided on the inner surface of the mounting hole 29 of the second tab 28B. The reason for this will be described in detail later.
The first direction (one direction) is a direction orthogonal to a tangent T of an arc shape at an arbitrary position P on the rear outer surface of the horizontal cross section of the rear bumper face 10 as shown in fig. 8, and the second direction (the other direction) is a direction along the tangent T. The tangent T in the present embodiment is a tangent at a position P where an orthogonal line Q passes through a middle point of a straight line connecting the center of the fastening portion of the first protruding piece 28A and the center of the fastening portion of the second protruding piece 28B, and intersects the curved surface of the rear outer surface of the rear bumper face 10.
As shown in fig. 10, a third rib 34 is provided on the lower surface of the first protruding piece 28A so as to surround the lower edge of the mounting hole 29 from three sides. The first protruding piece 28A abuts on the upper surface of the connecting piece 16 via the third rib 34. Although not shown, a third rib 34 is also provided on the lower surface of the second protruding piece 28B in a protruding manner, similarly to the lower surface of the first protruding piece 28A.
In the present embodiment, the first rib 32, the second rib 33, and the third rib 34 of the first protruding piece 28A and the first rib 32 and the third rib 34 of the second protruding piece 28B constitute a first position adjustment portion between the cover member 14 and the exhaust pipe dresser 15. The relative positions of the cover member 14 and the exhaust pipe dresser 15 can be finely adjusted by appropriately changing the projection heights of the first ribs 32, the second ribs 33, and the third ribs 34. The projecting heights of the first rib 32, the second rib 33, and the third rib 34 can be changed by, for example, increasing or decreasing the depth of the recessed portion of the die surface of the forming die for shaping the covering member 14.
Fig. 12A is a diagram showing the relative positions of the cover member 14 and the exhaust pipe dresser 15 in the reference state. Fig. 12B is a diagram showing a state in which the projecting height of the first rib 32 (second rib 33) on the right side in the figure is raised and the projecting height of the first rib 32 (second rib 33) on the left side in the figure is lowered. In this state, the cover member 14 is position-adjusted to move in the rightward direction in the drawing with respect to the exhaust pipe dresser 15.
On the contrary, fig. 12C is a diagram showing a case where the projecting height of the first rib 32 (second rib 33) on the left side in the drawing is raised and the projecting height of the first rib 32 (second rib 33) on the right side in the drawing is lowered. In this state, the cover member 14 is position-adjusted to move in the leftward direction in the drawing with respect to the exhaust pipe dresser 15.
The reason why the second rib 33 is not provided on the inner surface of the mounting hole 29 of the second protruding piece 28B is as follows.
In the present embodiment, as shown in fig. 8, the first projecting piece 28A and the second projecting piece 28B are disposed apart from each other in the second direction (substantially the vehicle width direction). Therefore, if the second rib 33 (position regulating portion) is provided to both the first projecting piece 28A and the second projecting piece 28B that are arranged apart in the second direction, when the exhaust pipe dresser 15 as a resin member thermally expands, a large stress is generated at the contact portion of each projecting piece with the shoulder bolt 30. In the present embodiment, by providing the second rib 33 as the position restricting portion only in the mounting hole 29 of the first protruding piece 28A, it is possible to prevent the occurrence of excessive stress due to thermal expansion of the exhaust pipe dresser 15.
As described above, the mounting portion structure of the exhaust pipe dresser 15 of the present embodiment positions and fixes the exhaust pipe dresser 15 to the cover member 14, and in this state, mounts the cover member 14 to the rear bumper face 10. Therefore, as compared with the case where the exhaust pipe dresser 15 is attached to the rear bumper face 10 via a bracket or the like as another member, it is possible to improve the accuracy of assembling the exhaust pipe dresser 15 and the cover member 14 while suppressing an increase in the number of components.
Therefore, when the mounting portion structure of the exhaust pipe dresser 15 of the present embodiment is adopted, the exhaust pipe dresser 15 and the cover member 14 can be assembled to the rear bumper face 10 with high accuracy without increasing the number of components.
Further, the mounting portion structure of the exhaust pipe dresser 15 of the present embodiment can keep the gap h1 between the insertion hole 17 of the cover member 14 and the rear end portion (the branch cylinder 15B) of the exhaust pipe dresser 15 constant with high accuracy, and therefore can suppress heat conduction from the rear end portion (the branch cylinder 15B) of the exhaust pipe dresser 15 to the rear bumper face 10.
Therefore, in the case where the structure of the mounting portion of the exhaust pipe dresser 15 according to the present embodiment is adopted, it is possible to suppress the heat of the exhaust pipe dresser 15 heated by the exhaust gas from being transmitted to the vehicle exterior side surface of the rear bumper face 10 through the cover member 14.
In the mounting portion structure of the exhaust pipe dresser 15 of the present embodiment, the positioning and fixing portion of the exhaust pipe dresser 15 and the cover member 14 is configured so that the relative position of the exhaust pipe dresser 15 and the cover member 14 can be easily adjusted. Therefore, the relative position of the exhaust pipe dresser 15 and the cover member 14 can be appropriately adjusted, and the exhaust pipe dresser 15 and the cover member 14 can be fixed in this state. Therefore, the assembly accuracy between the exhaust pipe dresser 15 and the cover member 14 can be further improved.
Specifically, in the mounting portion structure of the exhaust pipe dresser 15 of the present embodiment, a first rib 32 protruding in the first direction is provided as an adjusting portion of the relative position between the exhaust pipe dresser 15 and the cover member 14 on the inner surface of the mounting hole 29 of the first protruding piece 28A and the second protruding piece 28B of the cover member 14. Therefore, the position of the shoulder bolt 30 in the first direction in the mounting hole 29 can be finely adjusted by changing the projecting height of the first rib 32 at the stage of die forming the covering member 14. Therefore, the relative position of the exhaust pipe dresser 15 and the cover member 14 in the first direction can be adjusted thereby.
In the mounting structure of the exhaust pipe dresser 15 according to the present embodiment, a second rib 33 protruding in the second direction is provided as an adjusting portion of the relative position between the exhaust pipe dresser 15 and the cover member 14 on the inner surface of the mounting hole 29 of the first protruding piece 28A. Therefore, by changing the protruding height of the second rib 33 at the stage of die-forming the covering member 14, the position of the shoulder bolt 30 in the second direction within the mounting hole 29 can be finely adjusted. Therefore, the relative position of the exhaust pipe dresser 15 and the cover member 14 in the second direction can be adjusted thereby.
In particular, in the mounting portion structure of the exhaust pipe dresser 15 of the present embodiment, the first direction is a direction orthogonal to a tangent T to an arc shape at an arbitrary position P on the rear outer surface of the horizontal cross section of the rear bumper face 10, and the second direction is a direction along the tangent T. Therefore, by adjusting the projecting heights of the first ribs 32 and the second ribs 33, the position of the exhaust pipe dresser 15 can be easily adjusted with respect to the circular arc-shaped rear outer surface of the horizontal cross section of the rear bumper face 10.
In the mounting portion structure of the exhaust pipe dresser 15 of the present embodiment, the wall of the rear end portion (the branch cylinder 15B) of the exhaust pipe dresser 15 has a hollow portion 50. Therefore, in the case of this configuration, the hollow portion 50 functions as a heat insulating layer, and therefore, the heat transfer of the exhaust gas passing through the inside of the exhaust pipe dresser 15 to the cover member 14 side can be further suppressed.
In the present embodiment, the hollow portion 50 is provided in the wall of the rear end portion (branch tube 15B) of the exhaust pipe dresser 15, and the wall of the rear end portion (branch tube 15B) is made thick. Therefore, the clearance h1 between the insertion hole 17 of the cover member 14 and the rear end portion (the branch cylinder 15B) of the exhaust pipe dresser 15 is no longer noticeable in a vehicle rear view. Therefore, the appearance of the vehicle viewed from the rear of the vehicle is improved by adopting the present configuration.
In the mounting portion structure of the exhaust pipe dresser 15 of the present embodiment, the cover member 14 has the partition wall 18, and the cover member 14 is locked to the edge of the exhaust port 11 of the rear bumper face 10 at the upper position and the lower position of the partition wall 18. Therefore, in the case of the present structure, the vertical deformation of the exhaust port 11 of the rear bumper face 10 can be favorably prevented by the partition wall 18 of the cover member 14.
The mounting portion structure of the exhaust pipe dresser 15 of the present embodiment is formed such that the width of the partition wall 18 in the lateral direction gradually increases from the central region in the vertical direction toward the respective upper and lower end portions. Therefore, in the case of this configuration, the partition wall 18 stably receives the vertical load acting on the central region of the insertion hole 17, and deformation of the insertion hole 17 can be suppressed.
In the mounting portion structure of the exhaust pipe dresser 15 of the present embodiment, an inner flange portion 14b that extends by being bent from the base wall 14a toward the vehicle front side is provided at the opening edge portion of the insertion hole 17 of the cover member 14. Therefore, in the case of this configuration, the rigidity of the peripheral edge portion of the insertion hole 17 can be increased by the inner flange portion 14b, and deformation of the peripheral edge portion of the insertion hole 17 can be suppressed.
In addition, in the mounting structure of the exhaust pipe dresser 15 of the present embodiment, the fitting wall 11a is provided at the inner peripheral edge portion of the exhaust port 11 of the rear bumper face 10, the fitting groove 19 into which the fitting wall 11a is fitted is provided in the cover member 14, and the position adjustment ribs 20, 21 are provided between the fitting wall 11a and the fitting groove 19. Therefore, by appropriately changing the projecting heights of the position adjustment ribs 20 and 21 when the rear bumper face 10 is die-molded, the relative positions of the fitting wall 11a and the fitting groove 19 can be appropriately adjusted. Therefore, when this structure is adopted, the cover member 14 can be assembled to the rear bumper face 10 with high accuracy.
The present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the scope of the invention.
Claims (11)
1. An installation portion structure of an exhaust pipe dresser, comprising:
a rear bumper face disposed at a rear portion of the vehicle body and having an exhaust port penetrating in a front-rear direction of the vehicle body;
an exhaust pipe that discharges exhaust gas;
an exhaust pipe dresser that guides exhaust gas discharged from the exhaust pipe to a rear side of a front face of the rear bumper; and
a covering member having an insertion hole through which a rear end portion of the exhaust pipe dresser is inserted, the covering member covering an inner peripheral edge portion of the exhaust port,
the exhaust pipe dresser is positioned and fixed to the cover member with a predetermined gap between the outer peripheral surface of the rear end portion and the insertion hole, and the cover member is attached to the front surface of the rear bumper.
2. The mounting portion structure of an exhaust pipe dresser as set forth in claim 1,
the positioning and fixing portion of the exhaust pipe dresser and the cover member has a first position adjustment portion capable of adjusting the relative position of the exhaust pipe dresser and the cover member.
3. The exhaust pipe dresser mounting portion structure according to claim 2,
the positioning and fixing portion has a projecting piece provided to project from the cover member and having a vertically penetrating mounting hole, and a fastening member inserted into the mounting hole to fasten and fix the cover member to the exhaust pipe dresser,
the first position adjustment portion has a first rib that is provided so as to protrude from an inner surface of the mounting hole and restricts displacement of the fastening member in a direction orthogonal to an axial direction of the fastening member.
4. The exhaust pipe dresser mounting portion structure according to claim 3,
the first position adjustment portion has a second rib that is provided protruding from an inner surface of the mounting hole and limits displacement of the fastening member in another direction orthogonal to an axial direction of the fastening member.
5. The exhaust pipe dresser mounting portion structure according to claim 4,
the one direction is a direction orthogonal to a tangent line of a circular arc shape at an arbitrary position on a rear outer surface of a horizontal cross section of the rear bumper face, and the other direction is a direction along the tangent line.
6. The exhaust pipe dresser mounting portion structure according to any one of claims 3 to 5,
the first position adjustment portion has a third rib that is provided so as to protrude from an opposing surface of the protruding piece that opposes the exhaust pipe dresser in the up-down direction.
7. The exhaust pipe dresser mounting portion structure according to any one of claims 1 to 6,
the rear end portion of the exhaust pipe dresser is constituted by an annular wall having a hollow portion.
8. The mounting portion structure of an exhaust pipe dresser according to any one of claims 1 to 7,
the rear end portion of the exhaust pipe dresser is constituted by a pair of branch cylinders that branch into two branches to the left and right,
the cover member has a partition wall that partitions the insertion hole into right and left branch hole portions, and the branch tube corresponding to the rear end portion is inserted into each of the branch hole portions,
the cover member is locked to an edge of the exhaust port on the front surface of the rear bumper at upper and lower positions of the partition wall.
9. The exhaust pipe dresser mounting portion structure according to claim 8,
the partition wall is formed such that the width in the left-right direction gradually increases from the central region in the up-down direction toward each of the upper and lower end portions.
10. The mounting portion structure of an exhaust pipe dresser as set forth in any one of claims 1 to 9,
a flange portion extending toward the vehicle front side with respect to the vehicle exterior side surface of the covering member is provided at an opening edge portion of the insertion hole of the covering member.
11. The exhaust pipe dresser mounting portion structure according to any one of claims 1 to 8,
a fitting wall extending toward the front side of the vehicle body is formed on an inner peripheral edge portion of the exhaust port on the front surface of the rear bumper,
a fitting groove into which the fitting wall is fitted from the rear side of the vehicle body is formed in an outer edge portion of the insertion hole of the cover member,
a second position adjusting portion capable of adjusting the relative position of the fitting wall and the fitting groove is provided between the fitting wall and the fitting groove.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019001885A JP7121665B2 (en) | 2019-01-09 | 2019-01-09 | Mounting structure of exhaust pipe finisher |
| JP2019-001885 | 2019-01-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111425287A true CN111425287A (en) | 2020-07-17 |
| CN111425287B CN111425287B (en) | 2022-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911347063.3A Active CN111425287B (en) | 2019-01-09 | 2019-12-24 | Mounting part structure of exhaust pipe trimmer |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7121665B2 (en) |
| CN (1) | CN111425287B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114940063A (en) * | 2021-02-15 | 2022-08-26 | 本田技研工业株式会社 | Vehicle rear structure |
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| JP2017210121A (en) * | 2016-05-26 | 2017-11-30 | 本田技研工業株式会社 | Exhaust device |
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| US2979357A (en) * | 1956-09-27 | 1961-04-11 | Gen Motors Corp | Bumper-conduit exhaust assembly |
| DE10258250A1 (en) * | 2002-12-13 | 2004-07-15 | Dr.Ing.H.C. F. Porsche Ag | Rear trim part with an attached exhaust tailpipe |
| JP4502879B2 (en) * | 2005-05-13 | 2010-07-14 | 本田技研工業株式会社 | Support structure of exhaust finisher |
| DE102006024269A1 (en) * | 2006-05-24 | 2007-11-29 | Dr.Ing.H.C. F. Porsche Ag | exhaust system |
| JP2019043356A (en) * | 2017-09-01 | 2019-03-22 | トヨタ車体株式会社 | Vehicle baffle attachment structure |
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| CN101858241A (en) * | 2009-04-03 | 2010-10-13 | 本田技研工业株式会社 | The exhaust component of separating |
| JP2014144740A (en) * | 2013-01-30 | 2014-08-14 | Honda Motor Co Ltd | Pipe fitting structure for vehicle |
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| JP2017210121A (en) * | 2016-05-26 | 2017-11-30 | 本田技研工業株式会社 | Exhaust device |
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| US11939899B2 (en) | 2021-02-15 | 2024-03-26 | Honda Motor Co., Ltd. | Vehicle rear structure |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP7121665B2 (en) | 2022-08-18 |
| JP2020111112A (en) | 2020-07-27 |
| CN111425287B (en) | 2022-04-19 |
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