JP3759563B2 - Fuel cylinder mounting structure for vehicles with fuel cylinders - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fuel cylinder mounting structure of an automobile with a fuel cylinder that uses compressed natural gas or the like as fuel.
[0002]
[Prior art]
In an automobile using compressed natural gas or the like as fuel, natural gas or the like is compressed and stored in a fuel cylinder. For this reason, since this kind of fuel cylinder has a robust structure that can withstand pressurization, it is larger and heavier than a gasoline tank. In the case where such a fuel cylinder is mounted on a vehicle body, one that is mounted on the trunk room or on the front side of the trunk room is known (Japanese Patent Laid-Open No. 8-99543). Further, a prior art (Japanese Patent Laid-Open No. 10-16578) in which a gas container is supported on a part of a chassis frame is known. Alternatively, a prior art (Japanese Patent Laid-Open No. 9-3000988) in which a fuel cylinder is attached to a vehicle body integrally with a suspension or the like is known.
[0003]
[Problems to be solved by the invention]
However, it is not preferable to install a fuel cylinder on the front side of the trunk room or the trunk room because hatching type or wagon type vehicles deteriorate the aggressiveness of the luggage into the luggage room.
In addition, both the chassis with a gas container supported by a part of the chassis frame and the fuel cylinder attached to the vehicle body integrally with the suspension, etc. are all newly designed as a vehicle with a fuel cylinder. It was difficult to apply to the modified car.
On the other hand, a method of mounting a fuel cylinder on the lower surface of the floor panel is conceivable. However, a larger fuel cylinder than a gasoline tank and a heavy fuel cylinder are attached to the lower surface of the floor, and the support structure tends to be large. The work for assembling the cylinder was complicated.
[0004]
An object of the present invention is to solve the above-mentioned problems and to provide a fuel cylinder mounting structure for a vehicle with a fuel cylinder that can be applied to the body of an existing gasoline vehicle and that can be easily assembled.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a fuel cylinder mounting structure for a fuel cylinder-equipped automobile in which a fuel cylinder is supported on the lower surface of the floor panel, and a predetermined number of fuel cylinder mounting brackets are provided on the lower surface of the floor panel. The fuel cylinder is gripped via a cylinder holder consisting of a pair of bands that grips the fuel cylinder from the upper surface and the lower surface, and the cylinder holder is fastened to the fuel cylinder assembly bracket via a fastener. Assembling , the fastener is composed of bolts and nuts, and fastening bolts of different lengths are adopted at least at two locations, and each fastening bolt is used for positioning at the time of cylinder holder mounting, and a pair of cylinder holders constituting the cylinder holder Two curved portions corresponding to the outer shape of the fuel cylinder are formed on the opposite surface of the band. , Together to grip the fuel cylinder through these curved portions, the mounting holes formed in the band portion located between the fuel tanks mutually lies in the form larger than the normal diameter.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view conceptually showing an automobile with a fuel cylinder. In this automobile with a fuel cylinder, a bomby sea 4 is assembled between side members 3 of a frame 2 constituting a vehicle body 1. As shown in FIG. 2, the bomby sea 4 is attached to the lower surface side of the front position of the spare tire attachment portion 5 b behind the rear seat attachment portion 5 a of the rear floor panel 5.
[0007]
The attachment structure of the bomby sea 4 will be described with reference to FIGS.
As shown in FIG. 3, the bomby sea 4 is one in which two fuel cylinders 6 and 7 are integrally supported by cylinder holders 8 and 9. The cylinder holders 8 and 9 support two fuel cylinders 6 and 7 at two positions with a predetermined interval, and are composed of a pair of an upper band 10 and a lower band 11. The pair of upper band 10 and lower band 11 has curved portions 10a, 10b, 11a, and 11b corresponding to the outer shapes of the fuel cylinders 6 and 7, respectively, so that the sheet metal is along the cylindrical surface of the fuel cylinders 6 and 7, respectively. Formed. The upper band 10 and the lower band 11 are fastened to each other by a bolt or the like (not shown), and the fuel cylinders 6 and 7 are sandwiched between the curved portions 10a, 10b, 11a, and 11b.
The upper band 10 and the lower band 11 are provided with mounting holes 12, 13, and 14 (the central mounting hole 13 is common) on both sides of the curved portions 10a and 10b and on both sides of the curved portions 11a and 11b. The mounting holes 13 between the curved portions 10a and 10b and between the curved portions 11a and 11b are formed to have a larger diameter than the other mounting holes 12 and 14. When the size of the bolt head is smaller than the mounting hole 13, a washer is used.
[0008]
On the other hand, brackets 15, 16, 17 having a reverse hat-shaped cross section extending in the vehicle width direction are suspended from the lower surface side of the rear floor panel 5, and these brackets 15, 16, 17 are arranged in the front-rear direction of the vehicle body 1. Along the outer diameters of the fuel cylinders 6 and 7, the fuel cylinders 6 and 7 are suspended at a slightly larger interval. These brackets 15, 16, and 17 are screwed into nuts 19 through bolts 18 in mounting holes (not shown) formed in upper end flange portions 15 a, 15 b, 16 a, 16 b, 17 a, and 17 b that extend in the front-rear direction of the vehicle body 1. Thus, the rear floor panel 5 is fixed. Two mounting holes 20, 21, and 22 are formed in the bottom surfaces 15 c, 16 c, and 17 c of these brackets 15, 16, and 17, and studs as tightening bolts are formed in these mounting holes 20, 21, and 22, respectively. The bomby sea 4 is attached by being screwed together by nuts 23a, 24a, 25a through bolts 23, 25 and bolts 24.
[0009]
The stud bolt 23 on the front side to which the bomby sea 4 4 is attached has a longer neck length than the stud bolt 25, and is passed through the mounting hole 20 on the bottom surface 15c of the bracket 15 from the upper side and fixed in advance by welding or the like. . The rear stud bolt 25 is also passed through the mounting hole 22 on the bottom surface 17c from the upper side and fixed by welding or the like. A nut 24a is fixed to the center mounting hole 21 by welding or the like. The bon- beesy 4 is fixed to the front and rear stud bolts 23, 25 by tightening nuts 23a, 25a from below and screwing the bolt 24 from below to the central nut 24a.
[0010]
Reinforcing panels 26, 27, and 28 for reinforcing the brackets 15, 16, and 17 are disposed on the upper surface side of the rear floor panel 5 by welding or bolting, respectively. The front side reinforcing panel 26 and the rear side reinforcing panel 28 are fastened together with the rear floor panel 5 by bolts 18 and nuts 19. The intermediate portion reinforcing panel 27 is fastened to the rear floor panel 5 by bolts 18 and nuts 19 at the front side, and the rear side is fixed to a bulging plate 29 disposed at the front end portion of the spare tire storage portion by welding or the like. ing.
[0011]
Next, a procedure for attaching the fuel cylinder of the automobile with the fuel cylinder having the above-described configuration will be described.
Two fuel cylinders 6 and 7 and two cylinder holders 8 and 9 are prepared.
Two lower bands 11 are arranged at a predetermined interval, and fuel cylinders 6 and 7 are arranged on the curved portions 11 a and 11 b of these lower bands 11. Next, the curved portions 10 a and 10 b of the upper band 10 are arranged on the fuel cylinders 6 and 7 so as to correspond to the two lower bands 11. Then, the upper band 10 and the lower band 11 are combined and fastened together to assemble the bomby sea 4.
[0012]
In order to attach the bomby sea 4 to the vehicle body 1, the bomby sea 4 is lifted and carried to the lower surface of the car body 1 that has been lifted up. Then, the mounting holes 12 on the front side of the cylinder holders 8 and 9 are passed through two long stud bolts 23 under the neck mounted on the bracket 15 on the front side.
Next, the bomb assembly 4 is further raised, and the mounting holes 14 on the rear side of the cylinder holders 8 and 9 are passed through the two stud bolts 25 having a normal length attached to the bracket 17 on the rear side. Then, nuts 23 a and 25 a are screwed onto these stud bolts 23 and 25.
[0013]
Finally, a bolt 24 is passed through the central mounting hole 13 of the cylinder holders 8 and 9 from below, and the bolt 24 is screwed into a nut 24 a attached to the central bracket 16, thereby fixing the bomby sea 4 to the bracket 16. To do. Since the central mounting hole 13 of the cylinder holders 8 and 9 has a larger diameter than the front and rear mounting holes 12 and 14, the bolt 24 can be easily fastened. Then, the nuts 23a, 25a and the bolts 24 are firmly tightened to complete the assembly.
[0014]
According to the above embodiment, the brackets 15, 16, 17 are suspended from the lower surface side of the rear floor panel 5, and the two fuel cylinders 6, 7 and the two cylinder holders 8, Since the two fuel cylinders 6 and 7 are mounted by assembling the bomby sea 4 constituted by 9, the fuel cylinders 6 and 7 which are larger and heavier than the gasoline tank can be easily assembled to the vehicle body 1. it can.
Further, since the brackets 15, 16, and 17 can be reinforced only by arranging the reinforcing panels 26, 27, and 28 on the upper surface side of the rear floor panel 5 by welding or bolting, the body of an ordinary gasoline vehicle is provided. By slightly improving 1, it can be handled as an automobile with a fuel cylinder.
[0015]
Further, since the two stud bolts 23 on the front side have a longer neck length than the two stud bolts 25 on the rear side, the bomb bearsie 4 is lifted and the cylinder bolt 1 is attached to the stud bolt 23 on the vehicle body 1 side. When assembling the mounting holes 12 on the front side of the 8 and 9, the two stud bolts 23 serve as guides and can be easily assembled, improving the assemblability.
Then, after the two stud bolts 23 on the front side are assembled, the two stud bolts 25 on the rear side serve as a guide, so the position can be determined in two stages, thus further improving the assemblability. it can.
Therefore, the positioning can be facilitated as compared with the method in which the four front and rear stud bolts are aligned simultaneously.
[0016]
Furthermore, the cylinder 4 is composed of two fuel cylinders 6 and 7 and two cylinder holders 8 and 9. The upper band 10 and the lower band 11 of the cylinder holders 8 and 9 are assembled to the two fuel cylinders 6 and 7. Because it is assembled, the regular position is difficult to come out. Therefore, the positional relationship between the mounting holes 12, 13, and 14 is likely to vary. However, since the central mounting hole 13 has a larger diameter than the front and rear mounting holes 12 and 14, the stud bolt 24 can be easily fastened even if the position of the mounting hole 13 varies.
[0017]
The present invention is not limited to the above embodiment. For example, the cylinder 4 is composed of two fuel cylinders 6 and 7 and two cylinder holders 8 and 9, but the number of fuel cylinders and The diameter may be appropriately selected as necessary, and the number of cylinder holders can be appropriately changed.
Furthermore, the number and length of the long stud bolts 23 can also be set as necessary. Instead of the stud bolt 23 on the front side, the stud bolt 25 on the rear side can be made longer than the stud bolt 23 on the front side.
Further, the central mounting hole 13 formed in the upper band 10 and the lower band 11 of the cylinder holders 8 and 9 may be a long hole depending on the direction of variation. In addition, the front and rear mounting holes 12 and 14 are also long holes so that the assembly can be facilitated.
Further, depending on the mounting position or diameter of the fuel cylinders 6 and 7, there is a possibility of interfering with the lower surface of the rear floor panel 5. In this case, the rear floor panel 5 can be dealt with by forming an opening hole. The opening hole can be structured to be covered by another member.
[0018]
【The invention's effect】
As described above, according to the fuel cylinder mounting structure of an automobile with a fuel cylinder according to the present invention, the following effects can be obtained.
In a fuel cylinder mounting structure of a fuel cylinder-equipped vehicle in which a fuel cylinder is supported on the lower surface of the floor panel, a predetermined number of fuel cylinder mounting brackets are suspended from the lower surface of the floor panel at predetermined intervals, and the fuel cylinder is disposed on the upper surface. and with gripping through Bonbehoruda comprising a pair of bands for gripping the lower surface, since the Bonbehoruda assembled fuel cylinder and fastened via a fastener to the bracket with the fuel cylinder assembly, the body of existing gasoline In addition, the fuel cylinder can be easily assembled. In addition, the fasteners are composed of bolts and nuts, and bolts for fastening with different lengths are used in at least two locations, and each fastening bolt is used for positioning when installing the cylinder holder. A heavy fuel cylinder can be easily assembled, and the assembly performance of the fuel cylinder is improved. Further, two curved portions corresponding to the outer shape of the fuel cylinder are formed on the opposing surfaces of the pair of bands constituting the cylinder holder, respectively, and the fuel cylinder is gripped through these curved portions and between the fuel cylinders. Since the mounting hole formed in the positioned band portion is formed larger than the normal diameter, the fastening bolt can be easily fastened even if the position of the mounting hole varies.
[Brief description of the drawings]
FIG. 1 is a perspective view of a vehicle body showing an embodiment of a fuel cylinder mounting structure of an automobile with a fuel cylinder according to the present invention.
FIG. 2 is a perspective view showing a fuel cylinder arranged on the lower surface of the rear floor panel.
FIG. 3 is a perspective view showing a bomby sea and a lower surface of a vehicle body.
4 is a cross-sectional view taken along line AA in FIG.
[Explanation of symbols]
1 Car body 2 Frame 3 Side member 4 Bomby sea 5 Rear floor panel 6, 7 Fuel cylinder 8, 9 Cylinder holder 10 Upper band (band)
11 Lower band (band)
12, 13, 14 Mounting holes 15, 16, 17 Bracket (Fuel cylinder assembly bracket)
20, 21, 22 Mounting holes 23, 25 Stud bolt (fastener)
24 bolts (fasteners)
23a, 24a, 25a nut

Claims (1)

In a fuel cylinder mounting structure of a fuel cylinder-equipped vehicle in which a fuel cylinder is supported on the lower surface of the floor panel, a predetermined number of fuel cylinder mounting brackets are suspended from the lower surface of the floor panel at predetermined intervals, and the fuel cylinder is disposed on the upper surface. And a cylinder holder composed of a pair of bands gripped from the lower surface, and the cylinder holder is fastened to the fuel cylinder assembly bracket via a fastener to assemble the fuel cylinder, and the fastener is tightened with a bolt and a nut. Constituting bolts with different lengths are used in at least two locations, and each clamping bolt is used for positioning when mounting the cylinder holder, and two on each of the opposing surfaces of the pair of bands constituting the cylinder holder. A curved portion corresponding to the outer shape of the fuel cylinder is formed, and the fuel cylinder is passed through the curved portion. With gripping, fuel tanks of motor vehicles with fuel tanks, characterized in that the mounting holes formed in the band portion located between the fuel cylinder cross formed larger than the normal diameter mounting structure.

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