JPS5970229A - Strucute for mounting fuel tank - Google Patents

Abstract

PURPOSE:To prevent a fuel tank from being damaged by a tank mounting member deformed at the collision of a vehicle, by providing a protective wall on the front edge of a tank mounting element on the tank mounting member so that the wall faces the outside of the side wall of the fuel tank. CONSTITUTION:An element 13 for mounting a fuel tank 4 is protruded from the mounting surface 12 of a mounting member 7, which is located at the side of the tank. The base 23 of an L-shaped element 22 is welded on the mounting element 13. The rising part of the L-shaped element 22 constitutes a protective wall 24 for the tank 4. At the collision of a vehicle, the mounting element 13 is moved along the mounting flange 10 of the fuel tank 4 and the protective wall 24 is brought into surface contact with the outside 21 of the side wall of the upper part 8 of the tank to prevent the tank from being damaged by the front edge of the protruded mounting element 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting structure for a fuel tank, and more particularly to a structure for mounting a 7-well tank in which the 7-well tank is disposed on the lower surface of a vehicle body floor.

As shown in FIGS. 1 and 2, for example, as a conventional mounting structure for this type of fuel tank, a fuel tank 4 is fixed using a vehicle body strength member 3 disposed on the underside of a rear floor 2 of a vehicle body 1. About if you do!
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In this case, the 7 fuel tank 4 is installed by fixing the two sides of the fuel tank 4, which has a substantially triangular planar shape, to the side members 5a, 5b extending in the longitudinal direction of the vehicle body and the cross members 5a, 5b extending in the vehicle width direction. By fixing the remaining side of the 7 fuel tank 4 to the mount member γ passed between the side member 5b and the cross member 6a on the rear end side, the frame is mounted on the lower surface of the cylinder floor 2.
It was designed to have a Yuel tank 4 installed,
For example, as shown in FIGS. 2 and 3, when looking at the attachment part between the mount member 7 and the fuel tank 4, the structure is similar to that of the upper tank 8 that constitutes the fuel tank 4.
A port insertion hole 11 is pre-opened in the mounting 72 flange 10 at the joint between the fuel tank 4 and the lower tank 9, and the mount member 1 is formed to have a substantially hat-shaped cross section, so that the mounting 72 flange 10 of the fuel tank 4 comes into contact with it. On the mounting base 12,
A mounting protrusion 13 is provided so as to protrude outward at a portion corresponding to the bolt insertion hole 11. Then, a mounting hole 14 and a weld nut 15 are provided in the mounting protrusion 13, and a bolt 16 that is connected to the mounting base 12 of the mount member T from below is screwed into the weld nut 15 to attach the fuel tank 4 to the mount member 7. It was fixed. Furthermore, as shown in Fig. 2, the fuel tank 4
The structure of the other two sides of the peripheral edge and the attachment parts of the side member 5a and the cross member 6b are also substantially the same as in the above case, and the mounting flange 1 provided on the peripheral edge of the fuel tank 4
1°18, side member 5a and cross member 6b
After abutting the mounting plates 19 and 20 provided on the respective mounting plates 19 and 20, they were fixed with bolts.

However, in such a conventional 7 fuel tank mounting structure, the mounting 7 on the periphery of the fuel tank 4 is
The lunges 10, 17.18 are brought into contact with the flat mounting pieces 13, 19.20 provided on the mount member T1 side member 5a and cross member 6b, respectively, and the corresponding contact parts are fixed with bolts as fasteners. For example, if the cross tank on the rear end side curves inward during a rear-end collision, the mount member 7 is pushed forward and the mounting protrusion 13 /
The mounting protrusion 13 moves forward along the flange 10 surface of the mounting 7 of the fuel tank 4, and the tip of the mounting protrusion 13 touches the outer surface 21 of the side wall of the fuel tank 4.
There was a risk that the fuel tank 4 would be damaged by contact with the fuel tank 4.

Although such a problem is particularly likely to occur at the attachment portion between the mount member T and the fuel tank 4, it can also occur between the side member 5a or the cross tank <6b and the fuel tank 4.

The present invention has been made in view of the above-mentioned conventional problems.The purpose of the present invention is to deform the tank mount member that fixes the fuel tank due to a collision, and the mounting piece comes into contact with the fuel tank. To provide a structure for mounting a fuel tank in which the fuel tank will not be damaged even if the fuel tank is damaged. As a means for achieving the above-mentioned object, the present invention is characterized in that a protective wall facing the outer surface of the side wall of the 7-well tank is provided at the tip of the attachment piece of the tank mount member.

The present invention will be described in detail below based on embodiments shown in the accompanying drawings.

No. 41. :'I and FIG. 5 show a first embodiment of the present invention, and show the structure of the attachment part between the mount member I and the 7-well tank 4.

The mount member I, which has a substantially hatch-shaped cross section, has one end welded to the cross member 6a on the rear end side on the lower surface of the rear floor 2, and the other end fixed to the side member. , 7 in two places on the front and back
A mounting protrusion 13 of the Yuel tank 4 is formed to protrude. The mounting protrusion 13 has a bottom wall 23 formed by bending a rectangular metal piece into an abbreviated shape and welding it to the top surface of the mounting protrusion 13, and a bottom wall 23 that is approximately the same as the tip of the mounting protrusion 13. An L-shaped member 22 consisting of a protective wall 24 rising from a position or a position slightly protruding from the tip is attached to the bottom wall 2.
3 and the mounting protrusion 13 are provided with a mounting hole 14 for inserting a bolt, and a weld nut 15 is provided on the upper surface of the bottom wall 23.

Therefore, when attaching the fuel tank 4 to the mount member γ, as shown in FIG. After bringing the bolts 16 into contact with the surface 12 and the lower surface of the mounting protrusion 13 and aligning the bolt insertion holes 11 previously opened in the mounting flange 10 with the mounting holes 14 of the mount member T, insert the bolts 16 into the weld nuts 1ξ. The fuel tank 4 is fixed to the mount member T by screwing together. In this case, the protective wall 24 of the L-shaped member 22 fixed to the upper surface of the mounting protrusion 13 faces the outer side wall 21 of the upper tank 8 of the 7-well tank 4.

As a result, for example, when the cross member 6a on the cylinder end side is deformed due to a rear collision and the mount member 7 moves forward, the mounting protrusion 13 of the mount member γ moves along the mounting flange 10 surface of the fuel tank 4, The protective wall 24 of the L-shaped member 22 is in surface contact with the side wall outer surface 21 of the upper tank 8 .

Therefore, the fuel tank 4 is not damaged by the tip of the mounting protrusion 13, and there is no need to worry about fuel leaking out even in the event of a collision.

Note that the structure of the attachment parts between the other two sides of the fuel tank 4 and the side members and cross members is similar to the above, with L-shaped members provided on the attachment plates attached to the side members and cross members, and this L-shaped part advantageous. A similar effect can be obtained by opposing the outer surface of the side wall of the 7-well tank 4.

FIG. 6 shows a second embodiment of the present invention, in which the tip of the mounting protrusion 13 provided on the mounting base 12 of the mount member I is extended and bent, and the mounting protrusion 13 and A protective wall 24 facing the side wall outer surface 21 of the fuel tank 4 is integrally provided. In this embodiment, in the event of a collision, it is possible to obtain the same effects as in the previous embodiment, and there is also the advantage that it can be integrally molded.

In the above embodiment, the bolt 16 is used as a stopper for fixing the fuel tank 4 and the mount member 1. However, the present invention is also applicable to cases where a reit is used as other fixing means. can.

As explained above, according to the fuel tank mounting structure according to the present invention, even if the tank mount member is deformed due to a vehicle collision, the deformed tank mount member will not damage the fuel tank. Fires caused by leaks can be reliably prevented.

[Brief explanation of the drawing]

Figure 1 is a side view of the vehicle showing the installation location of the 7-fuel tank, Figure 2 is a fuel tank installation layout diagram showing an example of the mounting structure of a conventional fuel tank, and Figure 3 is the installation location of the fuel tank.
4 is a perspective view of the mounting part of the mount member showing an embodiment of the mounting structure of the fuel tank according to the present invention, and FIG. 5 is a sectional view taken along the line 1 ft-1 in the figure. FIG. 6 is a sectional view corresponding to line T in FIG. 2 showing the structure of the mounting part, and FIG.
It is a cross-sectional view drawn by ss. 2... Rear floor (vehicle floor) 4... Fuel tank 5a, 5b... Side member (tank mount member) 5a, 5b... Cross member (tank mount member) γ... Mount member (tank mount member <)1
0... Mounting flange 13... Mounting protrusion (mounting piece) 16... Bolt (stop) 19.20... Mounting plate (mounting piece) 21... Side wall outer surface 24... Protective wall Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A mounting piece for mounting the 7-well tank is provided on the tank mount member provided on the underside of the vehicle floor, and a mounting flange provided around the 7-well tank is overlapped with this mounting piece, and a stopper is attached. 7. A fuel tank mounting structure for fixing a fuel tank using a fuel tank, characterized in that a protective wall facing the outer surface of a side wall of a fuel tank is provided at the tip of the mounting piece.