JPH0331610Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a fuel tank for a vehicle, and particularly to a structure for incorporating an evaporation chamber into the tank.

Prior Art As shown in Fig. 1, a wave dissipating plate 2 for preventing fuel waves in a vehicle fuel tank 1 and an evaporative chamber 3 for guiding vaporized gas out of the tank are arranged independently from each other. It has a structure in which a ventilation pipe 5 is fixed to the inner surface of the tank top plate above the corrugated plate 2 to form a connection port with the canister, and a mounting bracket 4 is required to install the evaporative chamber 3, which is attached to the tank. It is necessary to assemble the chamber after welding it to the inner surface of the top plate, which increases the number of man-hours and parts needed to assemble the tank, leading to higher costs. Also, welding to a thin tank top plate is not preferable in terms of strength.

Furthermore, even if the fuel tank is made of synthetic resin, special mounting means must be taken to ensure that it is integrally attached to the top plate of the tank, including its placement.

Purpose of the invention The present invention fundamentally changes the design concept of attaching the evaporative pot chamber to the tank top plate and disposing it in the space above the liquid level, and provides a new vehicle fuel tank in which the wave-dissipating plate is considered as a carrier for the evaporative pot chamber.

The present invention makes it possible to eliminate the above-mentioned problems that arise from attaching an evaporative pot chamber to a tank top plate.

Structure of the invention In accordance with the above-mentioned object, the present invention is a vehicle fuel tank equipped with a wave-absorbing plate and an evaporative potion, in which the evaporative plate and the wave-dissipating plate are combined by mechanical coupling means, welding, molding, etc.
The evaporative chamber is integrally provided above the intersection of the wave-absorbing plate with the wave-absorbing plate as a carrier, and is arranged in a space above the liquid level in the tank.

Embodiments of the invention Several embodiments of the invention will be described below with reference to the drawings.

In FIGS. 2A and 2B, the wave-dissipating plates 12 are arranged in a cross-assembled manner, and an evaporative chamber 13 is integrally provided on the upper part of the cross-section, and the chamber 13 is equipped with a vent pipe 14, which is assembled into the fuel tank 11 and extinguished. Corrugated plate 1
This figure shows the case in which the evaporative pot chamber 13 is placed above the liquid surface using the turret of No. 2.

The wave-dissipating plate 12 has its bottom surface supported on the inner bottom surface of the fuel tank 11, and a supporting piece 15 which is bent into an L-shape or a U-shape or the like to provide elasticity is provided at the end of the wave-dissipating plate 12. At 15, the inner surfaces of the fuel tank 11 are pressurized and supported in a facing arrangement, and the wave-absorbing plate 12 is assembled without play due to its elastic tensile action, and the supporting piece 15 is welded to the fuel tank side plate to attach the fuel tank to the fuel tank. For fixing, or as another example, support piece 15
is simply brought into elastic contact with the inner surface of the tank without welding, and the upper surface of the evaporative chamber 13 provided on the top of the wave-dissipating plate 12 is held down by the top plate of the fuel tank 11, and the upper, lower, left, right, and inner surfaces of the tank are pressed together. The wave-dissipating plate 12 mounted on the evaporative chamber is held in the same tank. Preferably, in order to ensure that the evaporative pot chamber 13 is supported by the tank top plate, a chamber holding portion 16 is provided on the tank top plate, which abuts against the top surface of the chamber.
to protrude.

FIGS. 3A and 3B show an example of mechanically assembling the evaporative chamber 13 to the wave-dissipating plate 12. A clamping piece 17 is provided on the wave-dissipating plate 12, and the wave-dissipating plate 12 is clamped by the clamping piece 17. In addition, a projection 17a is provided on the clamping piece 17, and the projection 17a is engaged with an engagement hole 18 provided in the wave-dissipating plate 12 on the clamping surface to be gripped.

In addition, in Figures 4A and 4B, the wave-dissipating plates 12 are arranged in a crossed configuration.
A chamber fitting part 19 is formed in the wave-absorbing plate 12 by recessing the four sides of the upper surface of the intersection part, and the bottom part of the evaporative chamber 13 is fitted into the fitting part 19 to form a mechanical coupling means as shown in FIG. Embodiments are shown in which they are attached or welded together.

Furthermore, FIGS. 4A and 4B show that elastic support pieces 15 are provided at the side ends of the wave-dissipating plate 12 in connection with the structure in which the wave-dissipating plate 12 is built into the tank in the embodiment shown in FIGS. 2A and B. At the same time, similar elastic support pieces 15' are provided at the upper and lower ends to elastically support the inner surface of the fuel tank 11 on all four sides, top and bottom, right and left, and the elastic support pieces 15' are used to support the assembly of the wave-absorbing plate 12 and evaporative chamber 13 and the fuel tank. An example of integration with 11 is shown below.

Furthermore, as a means for joining the evaporative chamber 13 to the wave-absorbing plate 12, in addition to mechanical coupling means as shown in FIG.
As shown in the figure, the wave-dissipating plate 12 is integrally molded with synthetic resin, and the evaporation chamber 13 is attached to the wave-dissipating plate 1.
2 and can be integrally molded.

For example, the chamber 13 has a half-cut structure, the bottom part 13a and the wave-dissipating plate 12 are integrally molded of synthetic resin, and the upper part 13b of the chamber is made of the same synthetic resin.
can be closed and welded to the chamber bottom 13a to form an integral body. In this case, Eva Pochamber 1
3 and the fuel tank 11 can be placed in a non-interfering state.

Effects of the invention As explained above, the present invention has a structure in which the wave-dissipating plate and the evaporative potion are combined and incorporated into the fuel tank, so that they can be handled as essentially one component when incorporated into the tank. Compared to the case where the plates are assembled into the tank separately, it is possible to reduce the number of assembly steps and simplify the assembly work, and it is also possible to reduce parts and costs. Furthermore, the evaporated chamber can be strongly and stably attached to the upper part of the intersection part of the wave absorbing plate, which has the highest rigidity, and can effectively secure the mounting strength against shocks, vibrations, waves, etc. As a result, the chamber and the wave-dissipating plate can be appropriately integrated into one structure.

In addition, it has the advantage of not causing any damage to the strength of the tank, as would be the case when directly attaching it to the top plate of the fuel tank by welding or the like. In addition, in line with the recent use of synthetic resin for fuel tanks and their attached mechanisms, the wave-dissipating plate has been made into an integrally molded structure of synthetic resin, and can be integrally molded with the evaporation chamber, further increasing the rationalization and simplification of the above-mentioned structure. be done.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the fuel tank showing the conventional evaporator and wave-dissipating plate mounting structure, and Figures 2 to 5.
The figures show an embodiment of the present invention. Figure 2A is a sectional view of the fuel tank showing the mounting structure of the evaporative pot chamber and wave-dissipating plate, Figure B is a perspective view of the wave-dissipating plate that combines the evaporative pot chamber, and Figure 3A is a perspective view of the wave-dissipating plate. 2 is a perspective view of a wave-absorbing plate showing an embodiment in which a mechanical coupling means is used to join the evaporative chambers together before the chambers are assembled; FIG.
The figure is an enlarged cross-sectional view showing the state of the evaporative potion and the wave-dissipating plate after they are assembled, and FIG. Figure B is a cross-sectional view of the evaporative chamber with the evaporative chamber fitted and attached, and Figure 5 shows an example in which integrally molded synthetic resin is used to combine the evaporative chamber and the wave-dissipating plate, and the state before the upper part of the chamber is attached. FIG. 11...Fuel tank, 12...Wave dissipating plate, 13...
...Evaporation chamber, 14...Vent pipe, 15,1
5'...Support piece, 16...Chamber holding part, 1
7...Pinch piece.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a vehicle fuel tank in which a wave-dissipating plate and an evaporative chamber are formed as separate parts from the fuel tank, and both are incorporated into the fuel tank, wave-dissipating waves are dissipated by intersecting the evaporative chamber. A fuel tank for a vehicle, characterized in that the fuel tank is integrally provided above the intersection of the plates and placed above the liquid level. (2) The vehicle fuel tank according to claim 1, wherein the chamber bottom of the evaporative chamber and the wave-dissipating plate are integrally molded from synthetic resin.