CN211543250U - Vehicle lower structure - Google Patents
Vehicle lower structure Download PDFInfo
- Publication number
- CN211543250U CN211543250U CN201922151468.1U CN201922151468U CN211543250U CN 211543250 U CN211543250 U CN 211543250U CN 201922151468 U CN201922151468 U CN 201922151468U CN 211543250 U CN211543250 U CN 211543250U
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- CN
- China
- Prior art keywords
- exhaust pipe
- bolt
- vehicle
- nut
- downstream
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- 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.)
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- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 34
- 239000002828 fuel tank Substances 0.000 abstract description 25
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The utility model provides a vehicle substructure. The vehicle lower portion structure includes a fuel tank and an exhaust pipe having an upstream side exhaust pipe, a downstream side exhaust pipe, and a connecting portion connecting the upstream side exhaust pipe and the downstream side exhaust pipe, the connecting portion disposed near the fuel tank includes an upstream side flange formed on the upstream side exhaust pipe, a downstream side flange formed on the downstream side exhaust pipe, and a bolt and a nut fastening and connecting the upstream side flange and the downstream side flange, and the bolt and the nut are disposed such that a head portion of the bolt is positioned further toward a vehicle front side than the nut. Based on the above structure of the utility model, the oil tank receives the damage when preventing that the vehicle from taking place the rear portion collision.
Description
Technical Field
The utility model relates to a vehicle substructure.
Background
Conventionally, a vehicle lower portion structure including an oil tank provided under a floor and an exhaust pipe extending in a vehicle front-rear direction has been widely adopted. In this structure, a recess is formed in the bottom surface of the fuel tank, and the exhaust pipe is disposed in the recess.
Generally, an exhaust pipe includes an upstream side exhaust pipe, a downstream side exhaust pipe, and a connecting portion connecting the upstream side exhaust pipe and the downstream side exhaust pipe. The connecting portion is disposed in the vicinity of the fuel tank, and has an upstream side flange formed on the upstream side exhaust pipe, a downstream side flange formed on the downstream side exhaust pipe, and a bolt and a nut for connecting the upstream side flange and the downstream side flange.
Further, in the case where the head portion of the bolt is positioned on the vehicle rear side with respect to the nut and the shaft portion protruding from the head portion of the bolt is disposed toward the vehicle front side, if the vehicle collides with the rear portion, the connecting portion moves toward the vehicle front side due to the deformation of the exhaust pipe and the bolt collides with the fuel tank, the shaft portion of the bolt collides with the fuel tank, and the contact area between the shaft portion of the bolt and the fuel tank is small, so that the load acting on the fuel tank is concentrated, and therefore the fuel tank may be damaged.
SUMMERY OF THE UTILITY MODEL
In view of the above, an object of the present invention is to provide a vehicle substructure capable of preventing an oil tank from being damaged when a rear-end collision occurs in a vehicle.
In order to solve the above-described problems, the present invention provides a vehicle lower portion structure including a tank having a recess formed in a bottom surface thereof, and an exhaust pipe disposed in the recess of the tank and extending in a vehicle longitudinal direction, the exhaust pipe including an upstream exhaust pipe, a downstream exhaust pipe, and a connecting portion connecting the upstream exhaust pipe and the downstream exhaust pipe, the connecting portion disposed in the vicinity of the tank including an upstream flange formed on the upstream exhaust pipe, a downstream flange formed on the downstream exhaust pipe, and a bolt and a nut for fastening and connecting the upstream flange and the downstream flange, the vehicle lower portion structure being characterized in that: the bolt and the nut are configured such that the head of the bolt is located further on the vehicle front side than the nut.
The utility model discloses an above-mentioned vehicle substructure's advantage lies in, takes place the rear portion collision when the vehicle, because of the blast pipe warp and lead to connecting portion to the vehicle front side removal and make bolt and oil tank bump the time, is that the head of bolt bumps with the oil tank mutually, because area of contact between the head of bolt and the oil tank is great, acts on the load dispersion on the oil tank, so can prevent that the oil tank from receiving the damage.
Additionally, in the above-mentioned vehicle substructure of the present invention, the preferred do, with the oil tank compares, connecting portion are located the vehicle rear side more, the head of bolt compares the nut is closer to the oil tank.
Drawings
Fig. 1 is a schematic view showing a vehicle lower portion structure according to an embodiment of the present invention.
Fig. 2 is a schematic view showing a state in which the head of a bolt in the vehicle lower portion structure shown in fig. 1 collides with an oil tank when a rear-end collision of the vehicle occurs.
Detailed Description
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
First, a vehicle lower portion structure 100 according to the present embodiment will be described with reference to fig. 1 and 2. Among them, shown in fig. 1 and 2 is a vehicle lower portion structure 100 seen from a vehicle bottom surface side.
The vehicle lower portion structure 100 can be used, for example, for a convertible vehicle whose roof can be opened and closed. As shown in fig. 1, the vehicle lower portion structure 100 includes a fuel tank 1 and two exhaust pipes 2.
The fuel tank 1 is disposed below a floor (not shown) and stores fuel for an internal combustion engine (not shown). A recess 11 recessed upward is formed in the bottom surface 1a of the fuel tank 1. The recess 11 is provided to accommodate a part of the two exhaust pipes 2. The recess 11 is disposed at an intermediate portion in the vehicle width direction (X direction), and extends in the vehicle front-rear direction (Y1 and Y2 directions).
Two exhaust pipes 2 extending in the vehicle longitudinal direction are provided for introducing exhaust gas discharged from the internal combustion engine into a muffler device (not shown). The two exhaust pipes 2 are disposed in the recess 11 of the fuel tank 1 substantially in bilateral symmetry. Each exhaust pipe 2 includes an upstream exhaust pipe 21, a downstream exhaust pipe 22, and a connecting portion 23.
The upstream exhaust pipe 21 is provided on the upstream side (Y1 direction side) of the exhaust gas flow, and is connected to the internal combustion engine. An upstream flange 231 is formed to be outwardly flanged at a downstream end of the upstream exhaust pipe 21. The upstream flange 231 has a plate-like annular shape, and two bolt through holes (not shown) are formed therethrough. The two bolt through holes are arranged 180 degrees apart in the circumferential direction.
The downstream exhaust pipe 22 is disposed downstream (Y2 direction side) of the exhaust gas flow, and is connected to a muffler device. A downstream flange 232 is formed to be outwardly flanged at an upstream end of the downstream exhaust pipe 22. The downstream flange 232 has a plate-like annular shape, and two bolt through holes (not shown) are formed therethrough. The two bolt through holes are arranged 180 degrees apart in the circumferential direction.
The connection portion 23 is used to connect the upstream exhaust pipe 21 and the downstream exhaust pipe 22. The connection portion 23 is disposed in the vicinity of the tank 1, and the connection portion 23 is located on the vehicle rear side (Y2 direction side) of the tank 1. As shown in fig. 2, the connecting portion 23 includes an upstream side flange 231, a downstream side flange 232, and two sets of bolts 233 and nuts 234.
The two sets of bolts 233 and nuts 234 are provided for fastening the upstream flange 231 and the downstream flange 232. The two sets of bolts 233 and nuts 234 are arranged at 180 degrees intervals in the circumferential direction, that is, one set of the two sets of bolts 233 and nuts 234 is arranged on the outer side in the vehicle width direction, and the other set of the two sets of bolts 233 and nuts 234 is arranged on the inner side in the vehicle width direction.
In the vehicle lower portion structure 100, the four sets of bolts 233 and nuts 234 of the two exhaust pipes 2 in total have the following structure. That is, each bolt 233 has a head portion 233a and a shaft portion 233b, and each nut 234 is screwed to the shaft portion 233b of the corresponding bolt 233. In a state where the shaft portions 233b of the bolts 233 are inserted into the bolt through holes of the upstream flange 231 and the bolt through holes of the downstream flange 232, the nuts 234 are screwed into the shaft portions 233b, thereby fastening and connecting the upstream flange 231 and the downstream flange 232. That is, the head 233a of the bolt 233 and the nut 234 clamp and fix the upstream flange 231 and the downstream flange 232.
In the present embodiment, the bolt 233 and the nut 234 are arranged such that the head 233a of the bolt 233 is positioned on the vehicle front side (Y1 direction side) of the nut 234. Specifically, the bolt 23 and the nut 234 are arranged such that the head 233a of the bolt 233 is located on the vehicle front side with respect to the upstream side flange 231, and the nut 234 is located on the vehicle rear side (Y2 direction side) with respect to the downstream side flange 232. Thus, the head 233a of the bolt 233 is closer to the fuel tank 1 than the nut 234.
Therefore, in the case of the vehicle lower portion structure 100, when the exhaust pipe 2 is bent to move the connection portion 23 toward the vehicle front side (the side in the Y1 direction) with respect to the fuel tank 1 due to a rear collision of the vehicle, and the bolt 233 of the connection portion 23 collides with the fuel tank 1, the head 233a of the bolt 233 collides with the fuel tank 1. That is, when the vehicle is involved in a rear collision, the shaft portion 233b of the bolt 233 does not easily collide with the fuel tank 1. Here, the rear collision includes a case where the vehicle is rear-ended by a following vehicle, and the vehicle collides with an obstacle in reversing.
< beneficial effects >
In the present embodiment, as described above, by disposing bolt 233 and nut 234 such that head 233a of bolt 233 is positioned further toward the vehicle front side than nut 234, when the vehicle collides at the rear, connecting portion 23 moves toward the vehicle front side due to deformation of exhaust pipe 2, and bolt 233 collides with fuel tank 1, head 233a of bolt 233 collides with fuel tank 1, and the contact area between head 233a of bolt 233 and fuel tank 1 is large, and the load acting on fuel tank 1 is dispersed, so that fuel tank 1 can be prevented from being damaged.
< other embodiments >
The above embodiments are merely examples of various aspects of the present invention, and do not constitute a basis for limiting explanation. Therefore, the technical scope of the present invention is defined not by the description of the above embodiments but by the description of the claims of the present invention. The technical scope of the present invention includes all modifications equivalent to the scope of the claims of the present invention.
For example, in the above-described embodiment, the example in which two exhaust pipes 2 are provided in the vehicle lower portion structure 100 is shown, but the present invention is not limited to this, and one or more than three exhaust pipes may be provided in the vehicle lower portion structure.
In addition, in the above-described embodiment, the example in which the connecting portion 23 includes two sets of the bolts 233 and the nuts 234 is shown, but the present invention is not limited to this, and the connecting portion may include three or more sets of the bolts and the nuts.
In addition, in the above-described embodiment, the example in which all of the bolts 233 and the nuts 234 in the vehicle lower portion structure 100 are disposed such that the heads 233a of the bolts 233 are positioned on the vehicle front side than the nuts 234 is shown, but the present invention is not limited to this, and only some of the bolts and nuts in the vehicle lower portion structure may be disposed such that the heads of the bolts are positioned on the vehicle front side than the nuts. For example, the bolt and the nut positioned on the outer side in the vehicle width direction may be arranged such that the head of the bolt is positioned on the vehicle front side of the nut; the bolt and the nut located on the vehicle width direction inner side are arranged such that the head of the bolt is located on the vehicle rear side of the nut.
In the above embodiment, the example in which the connection portion 23 is disposed on the vehicle rear side of the fuel tank 1 is shown, but the present invention is not limited to this, and the connection portion may be disposed in a recess portion of the fuel tank.
Claims (2)
1. A vehicle lower portion structure including a tank having a recess formed in a bottom surface thereof, and an exhaust pipe arranged in the recess of the tank and extending in a vehicle longitudinal direction, the exhaust pipe having an upstream exhaust pipe, a downstream exhaust pipe, and a connecting portion connecting the upstream exhaust pipe and the downstream exhaust pipe, the connecting portion arranged in the vicinity of the tank including an upstream flange formed on the upstream exhaust pipe, a downstream flange formed on the downstream exhaust pipe, and a bolt and a nut for fastening and connecting the upstream flange and the downstream flange, characterized in that:
the bolt and the nut are configured such that the head of the bolt is located further on the vehicle front side than the nut.
2. The vehicle lower part structure according to claim 1, characterized in that:
the connecting portion is located further on the vehicle rear side than the oil tank,
the head of the bolt is closer to the oil tank than the nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922151468.1U CN211543250U (en) | 2019-12-04 | 2019-12-04 | Vehicle lower structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922151468.1U CN211543250U (en) | 2019-12-04 | 2019-12-04 | Vehicle lower structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211543250U true CN211543250U (en) | 2020-09-22 |
Family
ID=72504520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922151468.1U Active CN211543250U (en) | 2019-12-04 | 2019-12-04 | Vehicle lower structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211543250U (en) |
-
2019
- 2019-12-04 CN CN201922151468.1U patent/CN211543250U/en active Active
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |