JPH10114227A - On-vehicle structure of fuel tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mount a support, on which a fuel tank is securely placed, on an outrigger, positioned in the vicinity of a high target value on a minimum ground, without being below a minimum ground height target value even when a manufacture error occurs to the distance in a longitudinal direction of a vehicle of the outrigger. SOLUTION: An inner support 15 extending longitudinally of a vehicle is provided with two end parts 15a and 15b coupled to sides 12a and 13a on the fuel tank side of outriggers 12 and 13 through brackets 21 and 22 by means of bolts and the bolt hole 21d of one bracket 21 is formed in an oblong hole long in the longitudinal direction of a vehicle, and forms an error absorption structure wherein a manufacture error in a distance in the longitudinal direction of a vehicle of the outriggers 12 and 13 is absorbed. Meanwhile, An outer support 16 extending longitudinally of a vehicle is provided with two end parts 16a and 16b coupled to the bottoms, inclined upward toward the outside of the vehicle, of the outriggers 12 and 13 by means of bolts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a fuel tank on a vehicle, and is particularly useful when the fuel tank is mounted on a route bus having a low floor.

[0002]

2. Description of the Related Art FIG. 6 is a plan view showing a conventional structure for mounting a fuel tank of a route bus on a vehicle, and FIG. 7 is a sectional view taken along line FF of FIG.

[0003] As shown in these figures, a pair of outriggers 2 and 3 project from a side rail 1 of a chassis frame of a route bus to the outside of the vehicle and are located in front of and behind a fuel tank 4. , 3 support 5,
6, 7, 8 are attached.

[0004] The supports 5 and 6 extend in the longitudinal direction of the vehicle,
Both ends are bolted to the bottom surfaces 2a, 3a of the outriggers 2, 3, respectively, and the supports 7, 8 extend in the vehicle width direction and are mounted and fixed to the supports 5, 6. The fuel tank 4 is mounted on the supports 7 and 8, and the ends of the bands 9 and 10 wound around the fuel tank 4 are supported by the supports 7 and 8.
Is fixed by bolting to both ends.

The bolt hole 2c of one outrigger 2
Is formed in a long hole elongated in the vehicle front-rear direction, thereby coping with a manufacturing error (variation in distance) of the distance between the outriggers 2 and 3 in the vehicle front-rear direction.

[0006]

In recent years, in some route buses and the like, in order to facilitate getting on and off and moving in a vehicle, the floor panel is lowered to lower the floor surface so that the step of getting on and off is reduced. A so-called no-step structure having been eliminated has been developed.

However, when the position of the floor panel is lowered to lower the floor surface, the outriggers 2 and 3 are also lowered as shown by the dashed line in FIG.
Since a and 3a are located near the minimum ground clearance target value L,
The supports 5, 6 cannot be connected to these bottom surfaces 2a, 3a.

In order to cope with this, as shown in FIG. 8, the supports 5, 6 are raised and the outriggers 2,
3 may be positioned between the fuel tank side surfaces, but in this case, both ends of the supports 5, 6 are simply bolted or welded to the fuel tank side surfaces 2b, 3 of the outriggers 2, 3.
If a method of directly coupling to the b is adopted, if there is a manufacturing error in the distance between the outriggers 2 and 3 in the vehicle longitudinal direction as shown by a dashed line in FIG. 8, this manufacturing error cannot be absorbed, Supports 5 and 6 cannot be attached. When the supports 5 and 6 are connected to the bottom surfaces 2a and 3a of the outriggers 2 and 3 as in the related art, the bolt connection as described above or other connection means (for example, welding) may be used. The supports 5 and 6 can be attached by absorbing the manufacturing error.

Accordingly, in view of the above prior art, the present invention provides a support for mounting and fixing a fuel tank near the minimum ground clearance target value even if there is a manufacturing error in the vehicle longitudinal direction distance of the outrigger. An object of the present invention is to provide a vehicle mounting structure of a fuel tank that can be attached to an outrigger without falling below a minimum ground clearance target value.

[0010]

Means for Solving the Problems A first method for solving the above problems is described below.
The vehicle mounting structure of the fuel tank of the invention of the invention,
In the vehicle mounting structure of the fuel tank, in the vehicle mounting structure, the vehicle is mounted and fixed on a support coupled to a pair of outriggers located in front and rear of the fuel tank and protrudes outward from the side rail of the chassis frame and is mounted on the vehicle. Both ends of the extended support are respectively connected to the side surfaces of the pair of outriggers on the fuel tank side, and at least one of these connecting portions absorbs a manufacturing error of the pair of outriggers in the longitudinal direction of the vehicle. The structure is formed.

In a second aspect of the present invention, there is provided a fuel tank mounting structure in which a fuel tank extends from a side rail of a chassis frame to the outside of the vehicle and is connected to a pair of outriggers located in front of and behind the fuel tank. In a vehicle mounting structure of a fuel tank which is mounted and fixed on a vehicle, the first support extending in the vehicle front-rear direction has both ends coupled to the fuel tank side surface of the pair of outriggers, respectively. An error absorbing structure for absorbing a manufacturing error of the pair of outriggers in the longitudinal direction of the vehicle is formed on at least one of the coupling portions, and extends in the longitudinal direction of the vehicle and is more outward than the first support. The second support located on the side is connected to the bottom surface of the pair of outriggers that is inclined upward toward the outside of the vehicle at both ends, or one end is Attached to the bottom surface which is inclined upward toward the outside of the vehicle of the outriggers of square, and wherein the bound and the other end to the fuel tank side surface of the other of the outrigger.

A third aspect of the present invention is directed to a vehicle-mounted structure of a fuel tank according to the first or second aspect of the present invention, wherein the error absorbing structure is a fuel-mounted structure of the outrigger. The bracket attached to the tank side surface and the end of the support are bolted together, and one of the bolt holes of the bracket or the end of the support is formed as a long hole elongated in the vehicle longitudinal direction. It is characterized by the following.

Therefore, according to the fuel tank mounting structure of the first aspect of the present invention, since the support is located between the fuel tank side surfaces of both outriggers, the bottom surface of the outrigger is located near the minimum ground clearance target value. However, the position of the support is above the minimum ground clearance target value. In addition, since an error absorbing structure is formed in at least one of the joints, a manufacturing error of the outrigger in the vehicle longitudinal direction distance is absorbed by the error absorbing structure.

According to the second aspect of the invention, the first support has both ends coupled to the side surfaces of the outriggers on the fuel tank side, and the second support has both ends coupled to the both outriggers. Are respectively connected to the inclined bottom surface of
Alternatively, since the bottom surface of one of the outriggers and the fuel tank side surface of the other outrigger are coupled to each other, even if the lowest position of the bottom surface of the outrigger is in the vicinity of the minimum ground clearance target value, the first and second support members are supported. Is above the minimum ground clearance target value. In addition, since the error absorbing structure is formed in at least one of the coupling portions of the first support, a manufacturing error of the outrigger in the vehicle longitudinal direction is absorbed by the error absorbing structure. In addition, the second support can be easily connected because both ends or one end thereof are connected to the bottom surface of the outrigger using the inclined bottom surface.

According to the fuel tank mounting structure of the third aspect of the present invention, since the structure of the error absorbing structure is simple, the connection of the support is easy.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a plan view showing a vehicle-mounted structure of a fuel tank for a route bus according to an embodiment of the present invention, and FIG.
3 is an enlarged cross-sectional view taken along line BB of FIG. 1, FIG. 4 is an enlarged cross-sectional view taken along line CC of FIG. 1, and FIG. FIG. 4 is an enlarged cross-sectional view taken along line D.

As shown in FIGS. 1 and 2, a pair of outriggers 12 and 13 project outward from the side rails 11 of the chassis frame of the route bus to the outside of the vehicle, and a fuel tank 14 is provided.
Outriggers 12, 13
Supports 15, 16, 17, and 18 are attached to the support.

A support 16 extending in the vehicle width direction and extending outside in the vehicle width direction is located below the fuel tank 14 similarly to the conventional support 6 (see FIG. 6), and an inner side in the vehicle width direction extending in the vehicle front and rear direction. The support 15 is located inside the fuel tank 14 in the vehicle width direction and extends in the vehicle width direction.
7 and 18 are connected to the sides of the supports 15 and 16. The fuel tank 14 is mounted on these supports, and is fixed by bolting both ends of the bands 19 and 20 wound around the fuel tank 4 to both ends of the supports 17 and 18. Support 17,1
8 is connected to the side surfaces of the supports 15 and 16 without being mounted on the supports 15 and 16 as in the related art (see FIG. 7). This is to ensure that the position of the mounted fuel tank 14 is at a predetermined position lower than a low-level floor panel (not shown).

The details will be described later.
Has one end 15a connected to the fuel tank side surface 12a of the outrigger 12 via the bracket 21 and the other end 15b connected to the fuel tank side surface 13a of the outrigger 13 via the bracket 22. On the other hand, the support 16 has one end 16 a coupled to the bottom surface of the outrigger 12 and the other end 16 b coupled to the bottom surface of the outrigger 13.

As shown in FIGS. 3 and 4, the outrigger 1
Since the floor panels 2 and 13 are located at a low position due to the lowering of a floor panel (not shown), the bottom surfaces 12b and 13b are inclined upward toward the outside of the vehicle in order to maximize the ground height outside the vehicle. ing. For this reason, the brackets 21 and 22 connecting the support 15 and the fuel tank side surfaces 12a and 13a of the outriggers 12 and 13 are attached to the outriggers 12 and 13 respectively.
3 are bolted to the side surfaces 12a, 13a of the portion where the bottom surface 12b, 13b is still at a lower position (that is, the portion inside the fuel tank 14 in the vehicle width direction).

That is, as shown by a dashed line in FIG.
Even if the bracket 21 is to be connected to the side surface 12a closer to the outside of the vehicle, the bracket 21 cannot be connected at that position because it interferes with the flange portion (bottom portion) 12c of the outrigger 12. For this purpose, the brackets 21 and 22 are attached to the above positions, and the support 15 is
Instead of being positioned below the fuel tank (see FIG. 6) (see support 5 in FIG. 6), the fuel tank is positioned inside the fuel tank 14 in the vehicle width direction as described above.

As shown in FIGS. 1, 2, 3 and 5,
The bracket 21 includes a side portion 21a in contact with the side surface 12a of the outrigger 12 on the fuel tank side, a bottom portion 21b extending from the lower end of the side portion 21a to the fuel tank side, and a center portion of the bottom portion 21b and the fuel tank side of the side portion 21a. The cross section in the vehicle width direction extending from the side surface to the fuel tank side is formed by an inverted U-shaped coupling portion 21c. Then, the connecting portion 21 of the bracket 21
c and the end 15a of the support 15 inserted into the joint 21c are bolted up and down.
The bolt hole 21d on the c side is formed in a long hole that is long in the vehicle front-rear direction.
Error absorbing structure for absorbing a manufacturing error in the vehicle longitudinal distance.

As shown in FIGS. 1, 2 and 4, the bracket 22 is provided on the side surface 13a of the outrigger 13 on the fuel tank side.
And a connecting portion 22b extending in the vehicle width direction from the side surface of the side portion 22a toward the fuel tank and having a U-shaped cross section in the vehicle width direction. Then, the support 1 located below the connecting portion 22b of the bracket 22 and the connecting portion 22b
5 is bolted to the end 15b.

Therefore, the support 15 is connected to the outrigger 12,
The fuel tank 13 is located between the fuel tank side surfaces 12a and 13a and above the minimum ground clearance target value L. Moreover,
Since an error absorbing structure is formed at one joint,
This error absorbing structure absorbs a manufacturing error in the distance between the outriggers 12 and 13 in the vehicle longitudinal direction.

On the other hand, as shown in FIGS. 1, 3 and 4, the support 16 has flanges 1 at both ends 16a and 16b.
6a-1 and 16b-1, and these flange portions 16a-1 and 16b-1 are bolted to the bottom surfaces 12b and 13b of the outriggers 12 and 13, respectively. The upper surfaces of the flange portions 16a-1 and 16b-1 have outriggers 12 and 1 respectively.
3 are inclined along the inclination of the bottom surfaces 12b and 13b.
Therefore, the bottom surface 12 of the inclined outriggers 12 and 13
b, 13b, the support 16
Is held in a horizontal state without tilting. Further, the bolt hole 16 of one flange portion 16a-1 is formed.
a-2 is formed in a long hole in order to absorb a manufacturing error of the outriggers 12 and 13 in the vehicle longitudinal direction distance.

As described above, the support 16 is the outrigger 1
2, 13 are connected to the bottom surfaces 12b, 13b.
Since the position 13b is inclined upward and at a sufficiently high position, the position of the support 16 does not fall below the minimum ground clearance target value L. In other words, the outer support 16 is connected to the bottom surface of the outrigger in the same manner as in the related art (see FIG. 7) by utilizing the inclined bottom surfaces 12b and 13b of the outriggers 12 and 13.

As described above, according to the vehicle-mounted structure of the fuel tank according to the present embodiment, one of the connecting portions of the support 15 has an error absorbing structure, that is, the connecting portion 21c of the bracket 21 and the support Of the outriggers 12 and 13 in the longitudinal direction of the vehicle due to the error absorbing structure in which the bolt holes on the side of the connecting portion 21c are elongated holes in the longitudinal direction of the vehicle. Even if there is, this manufacturing error is absorbed by the error absorbing structure, and both ends 15a, 15b of the support 15 are surely secured to the fuel tank side surfaces 12a, 1 of the outriggers 12, 13.
3a. Accordingly, the support 15 is connected to the side surfaces 12a, 13 of the outriggers 12, 13 on the fuel tank side.
The target minimum ground clearance can be secured by being located between the points a.

The support 16 is provided with the outriggers 12, 1
3 is coupled to the bottom surfaces 12b, 13b by utilizing the inclination of the bottom surfaces 12b, 13b,
The connection is easier than the support 15 connected to the fuel tank side surfaces 12a and 13a.

In the above description, the supports 17 and 18 are connected to the side surfaces of the supports 15 and 16 so that the vertical width of the whole support is smaller than that of the related art. However, the present invention is not limited to this. Can be installed at a slightly higher position, a support extending in the vehicle width direction is superimposed on a support extending in the vehicle front-rear direction as in the related art (see FIG. 7), and the fuel tank is mounted on this support. You may make it mount and fix.

In the above description, the support 16 is coupled to the outriggers 12 and 13 by utilizing the inclination of the bottom surfaces 12b and 13b of the outriggers 12 and 13. Of course, if the outriggers 12 and 13 If the bottom surfaces 12b and 13b are not inclined, the support 16 is similar to the support 15 and the side surfaces 12 of the outriggers 12 and 13 on the fuel tank side.
a, 13a. Further, when only one of the bottom surfaces 12b and 13b of the outriggers 12 and 13 is inclined, the connection to the bottom surface and the connection to the side surface on the fuel tank side may be combined. In this case, it is not necessary to use the bracket 21 forming the above-described error absorbing structure for the support 16 in order to connect the support 16 to the side surface of the fuel tank. Outrigger 1 just by making it a long slot
It is possible to absorb manufacturing errors in the vehicle front and rear distances 2 and 13.

In the above description, the connecting portion 21c of the bracket 21 and the end portion 15a of the support 15 are bolted up and down, but may be bolted right and left (in the vehicle width direction). In other words, if the bolts are connected in the vehicle front-rear direction, manufacturing errors in the distance between the outriggers 12 and 13 in the vehicle front-rear direction cannot be absorbed. However, if the bolts are connected in a direction perpendicular to the vehicle front-rear direction, the bolt holes are formed in the vehicle front-rear direction. The long slot makes the vehicle loose in the vehicle front-rear direction, thereby absorbing the manufacturing error. Further, other connecting means (for example, welding) in a direction perpendicular to the vehicle front-rear direction.
Accordingly, even when the end of the support and the bracket are connected, the manufacturing error can be absorbed.

In the above description, the bolt holes 21d on the bracket 21 side are elongated. However, the bolt holes on the end 15a side of the support 15 may be elongated.

[0034]

As described above, according to the first embodiment of the present invention, at least one connecting portion of the support has an error absorbing structure. Accordingly, even if there is a manufacturing error in the vehicle longitudinal direction distance between the pair of outriggers, the manufacturing error is absorbed by the error absorbing structure, and both ends of the support are securely coupled to the fuel tank side surface of the pair of outriggers. Can be. Therefore, the target minimum ground clearance can be secured by positioning the support between the pair of outrigger side surfaces on the fuel tank side.

According to the fuel tank mounting structure of the second aspect of the present invention, at least one of the connecting portions of the first support has an error absorbing structure, so that the manufacturing error can be absorbed by the error absorbing structure. Thus, both ends of the first support can be securely connected to the side surfaces of the pair of outriggers on the fuel tank side. Therefore, the first support is located between the side surfaces of the pair of outriggers on the fuel tank side, and the target minimum ground clearance can be secured. On the other hand, the second support uses the fact that the bottom surface of the outrigger is inclined and connects both ends or one end to the same bottom surface, so that the target minimum ground clearance can be secured, and furthermore, the connection is achieved. Easy,
Low cost.

Further, according to the fuel tank mounting structure of the third aspect of the present invention, since the structure of the error absorbing structure is simple,
The support can be easily attached and the cost is low.

[Brief description of the drawings]

FIG. 1 is a plan view showing a vehicle-mounted structure of a fuel tank of a route bus according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged cross-sectional view taken along line BB of FIG. 1;

FIG. 4 is an enlarged cross-sectional view taken along line CC of FIG. 1;

FIG. 5 is an enlarged cross-sectional view taken along line DD of FIG. 1;

FIG. 6 is a plan view showing a conventional structure for mounting a fuel tank of a route bus on a vehicle.

FIG. 7 is a sectional view taken along line FF of FIG. 6;

FIG. 8 is an explanatory diagram showing a state when a support is provided between outriggers.

[Explanation of symbols]

 11 Side rail 12, 13 Outrigger 12a, 13a Fuel tank side surface 12b, 13b Bottom surface 14 Fuel tank 15, 16, 17, 18 Support 15a, 15b, 16a, 16b End 16a-1, 16b-1 Flange 21, 22 Bracket 21a Side 21b Bottom 21c Connection 21d Bolt hole (long hole) 22a Side 22b Connection

Claims (3)

[Claims] 1. A fuel tank which projects from a side rail of a chassis frame to the outside of a vehicle, is mounted and fixed on a support coupled to a pair of outriggers located in front and behind the fuel tank, and is mounted on the vehicle. In the vehicle mounting structure, both ends of the support extending in the vehicle front-rear direction are respectively coupled to the fuel tank side surface of the pair of outriggers, and at least one of these coupling portions is connected to the vehicle front-rear direction of the pair of outriggers. An on-vehicle structure for a fuel tank, wherein an error absorbing structure for absorbing a manufacturing error in distance is formed. 2. A fuel tank according to claim 1, wherein said fuel tank extends from a side rail of a chassis frame to the outside of the vehicle, and is mounted and fixed on a support coupled to a pair of outriggers located in front and behind said fuel tank. In the vehicle mounting structure, the first support extending in the vehicle front-rear direction has both ends coupled to the fuel tank side surface of the pair of outriggers, respectively.
An error absorbing structure is formed on at least one of these connecting portions to absorb a manufacturing error of the pair of outriggers in the longitudinal direction of the vehicle, and extends in the longitudinal direction of the vehicle and extends beyond the first support. The second support located on the outer side may be connected to both bottoms of the pair of outriggers on a bottom surface which is inclined upward toward the outside of the vehicle, or one end may be connected to the outside of the vehicle of one of the outriggers. A vehicle-mounted structure for a fuel tank, wherein the other end is connected to a fuel tank side surface of the other outrigger. 3. The structure for mounting a fuel tank on a vehicle according to claim 1, wherein the error absorbing structure bolts a bracket attached to a side face of the outrigger on the fuel tank side and an end of the support, A vehicle mounting structure for a fuel tank, wherein one of the bolt holes of the bracket or the end of the support is formed as a long hole extending in the vehicle front-rear direction.