JP2007131015A - Breather hose routing structure of fuel tank in vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a breather hose routing structure of a fuel tank in a vehicle facilitating mounting work of a breather hose without increasing the height of a deck and without lowering strength of a side member. <P>SOLUTION: In this structure, this fuel tank is arranged between left and right side members extending in the longitudinal direction of the vehicle under the deck, a fuel filler hose of the fuel tank is connected to a fuel filler neck mounted on side surfaces of the side members of a vehicle body via a lower side of the one side member, and the breather hose of the fuel tank is connected to an upper part of the fuel filler neck via a space between the one side member and the deck. In the structure, a part of an upper surface of the side member 20 is swollen to an upper side to form a swollen part 23, and the breather hose 12 is held and fixed by a top surface 23a of the swollen part 23 and a lower surface of the deck 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a breather hose piping structure for a fuel tank in a vehicle. Specifically, the fuel filler hose is installed between side members under the floor of a vehicle body and extends to the side of the vehicle body across the side members of the vehicle body frame. Further, the present invention relates to a breather hose piping structure of a fuel tank in which a fuel filler port is arranged on a vehicle side portion.

In a fuel tank in a vehicle, the air in the fuel tank is released to the outside through the fuel filler neck when fuel is supplied.Therefore, the breather hose has a position higher than the liquid level when the fuel tank is full and the fuel filler neck. The vicinity of the opening is in communication.
By the way, when the fuel tank is provided between the side members of the vehicle and the fuel filler port is provided on the side of the vehicle with respect to the side member, a fuel filler hose serving as a fuel filler passage to the fuel tank passes through the lower side of the side member and the fuel filler port. Need to be connected to the fuel filler neck. In addition, it is necessary to pay attention to the piping height so that fuel does not stay in the breather hose in the piping of the breather hose in that case. (I) A mode in which the breather hose is passed below the side member (for example, , Patent Document 1), (ii) A mode in which the breather hose is passed through the side member (for example, Patent Document 2), (iii) A mode in which the breather hose is passed through the upper side of the side member (for example, Patent Document 2) There are three types of aspects.
In any case, the fuel tank must be installed at such a height that the bottom surface of the fuel tank does not come into contact with an obstacle on the road surface.
Japanese Utility Model Publication No. 58-36585 (see FIGS. 1, 2 and 3) Japanese Patent Laid-Open No. 3-16521 (see FIGS. 1 and 4)

  However, (i) in the piping structure in which the breather hose is passed through the lower side of the side member, the side member must be arranged at a higher position than the breather hose. ) In the piping structure in which the breather hose is arranged through the side member, the side member has to be bored so that the strength of the side member is reduced. (Iii) The breather hose is arranged on the side member. In such a piping structure, the breather hose must be clamped in the vicinity of the deck of the side member.

  The present invention solves the above-described problems, and provides a breather hose piping structure for a fuel tank in a vehicle that does not increase the height of the deck, reduces the strength of the side members, and facilitates the work of installing the breather hose. The purpose is to provide.

According to the fuel tank breather hose piping structure of the vehicle of the present invention, the fuel tank is arranged between the left and right side members extending in the front-rear direction of the vehicle under the deck, and the fuel filler hose of the fuel tank is connected to the one side member. In a vehicle that is connected to a fuel filler neck that is attached to a side surface of a side member of a vehicle body via a lower portion, and that connects a breather hose of the fuel tank to the upper portion of the fuel filler neck through a space between the one side member and a deck. In the breather hose piping structure of the fuel tank, a part of the upper surface of the side member is expanded upward to form a bulging portion, and the breather hose is sandwiched and fixed between the top surface of the bulging portion and the bottom surface of the deck. It is in.
Moreover, the breather hose piping structure of the fuel tank in the vehicle of the present invention is that a groove for accommodating the breather hose is formed on the top surface of the bulging portion.
Furthermore, the breather hose piping structure of the fuel tank in the vehicle according to the present invention is that the upper surface of the side member to the top surface of the bulging portion is continued by an inclined surface.
The breather hose piping structure of the fuel tank in the vehicle according to the present invention is that a portion corresponding to the groove of the breather hose is covered with an elastic member that is more elastic than the breather hose.

According to the invention of claim 1, the breather hose is passed between the portion other than the bulging portion of the side member and the deck, that is, at a relatively large gap, and then the breather hose is passed to the bulging portion of the side member. By moving, the breather hose can be clamped and fixed between the deck and the side member, and the work for fixing the breather hose is facilitated. In addition, since the breather hose is piped between the deck and the side member and clamped, there is no need for a clamp, etc., and there is no need to fix it to the clamp, etc., and the deck height is increased to secure a working space. Further, there is no need to penetrate the side member, so that the strength of the side member is not lowered.
According to the invention of claim 2, since the breather hose is accommodated in the groove, reliable positioning can be achieved.
According to the invention of claim 3, since the breather hose is guided to the groove by the slope, the installation work of the breather hose becomes easy.
According to the invention of claim 4, since the contact portion with the side member or the deck is covered, it is possible to prevent the wear of the breather hose due to the vibration of the vehicle body, and the side member is caused by an assembly error or loading of the load on the deck. Even when the gap between the deck and the deck becomes smaller than the design value, the covered elastic member is elastically deformed, so that the breather hose can be clamped and fixed without crushing, and further, for example, vibration during operation, etc. Thus, even if the gap between the deck and the side member changes, the displacement amount is absorbed by the covering member, so that the durability of the breather hose can be improved without affecting the breather hose body.

Hereinafter, a breather hose piping structure of a fuel tank in a vehicle according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view showing a state in which a breather hose piping structure for a fuel tank in a vehicle according to the present invention is applied to a truck, FIG. 2 is an enlarged side view showing part A in FIG. 1, and FIG. The perspective view which showed a part of side member applied to the breather hose piping structure of the fuel tank in the vehicle which concerns on this invention, FIG. 4 is the upper direction which showed the arrangement | positioning aspect of the fuel filler neck and breather hose of a fuel tank FIG. 5 is a perspective view from below showing the arrangement of the fuel filler neck and breather hose of the fuel tank, FIG. 6 is a sectional view taken along line VI-VI in FIG. 4, and FIG. 4 is a sectional view taken along line VII-VII in FIG.

In FIG. 1, a truck body 1 is provided with a cargo loading deck 2 at the rear of the body.
In the vehicle body 1 of the truck, a fuel tank 10 is disposed between the left and right side members 20, 20 constituting the vehicle frame under the deck 2 at the rear of the vehicle body 1. Between the left and right side members 20, 20 and the deck 2, cross members 30 in a direction orthogonal to the side members 20, 20 are arranged at a constant interval. The side members 20 and 20 are provided with a certain gap between the side members 20 and the deck 2 by the cross member 30.
A fuel filler neck (hereinafter referred to as “filler neck”) 11 serving as a fuel filler opening of the fuel tank 10 is secured to the outer side of one side member 20 by tightening and fixing a bracket provided on the filler neck 11 with bolts 4. It is fixed to the side. The filler neck 11 is a pipe member that extends obliquely upward on the side of the vehicle. A fuel filler hose 14 is connected to the lower end, and a filler cap 15 that is a lid for a fuel filler opening is attached to the upper end.
The fuel filler hose 14 extends from the fuel tank 10 below one side member 20, and an end thereof extends to the side of the vehicle body 1 and is connected to the filler neck 11. Further, the breather hose 12 of the fuel tank 10 rises obliquely upward from the fuel tank 10, passes through the upper side of the side member 20, is bent obliquely downward, and is connected to the end of the filler neck 11. By bending in this way, fuel can be prevented from staying in the middle of the breather hose, and the fuel supply disposed below the deck 2 on the side of the vehicle with the connection position of the breather hose 12 and the filler neck 11 downward. Mouth height can be lowered. In addition, a space for refueling work such as opening and closing of the refueling port lid can be secured between the deck 2 and the refueling port, and a user-friendly refueling port that is easy to refuel can be set. The breather hose 12 is fitted with an elastic member 13 having elasticity that is softer than the breather hose 12.

  As shown in FIG. 3, the side member 20 is configured by welding a lower member 21 and a flat cover 22 having a U-shaped cross section perpendicular to the longitudinal direction. A mountain-shaped bulging portion 23 bulging upward is formed on the upper surface 22 a of the rear end portion of the cover 22. Specifically, the mountain-shaped bulge portion 23 is provided in the center of the flat cover 22 along the vehicle front-rear direction (longitudinal direction of the side member 20), and contributes to improving the rigidity of the cover 22 and the side member 20. ing. A flat top surface 23a is formed in the bulging portion 23, and a groove 24 extending in a direction perpendicular to the longitudinal direction of the side member 20 (the left-right direction of the vehicle) is formed on the top surface 23a. Has been. Further, the lower member 21 is formed with two screw holes 25 on the side surface located below the bulging portion 23 to which the bracket of the filler neck 11 is fastened and fixed.

In the present embodiment, the fuel tank 10 is installed in the vehicle body 1 as follows.
The fuel tank 10 to which the fuel filler hose 14 to which the filler neck 11 is attached and the breather hose 12 is attached is mounted on the vehicle body 1 from below without the filler neck 11 and the breather hose 12 being connected. Next, the breather hose 12 is passed between the upper surface 22 a of the side member 20 (a portion other than the bulging portion 23) and the deck 2, and the tip of the breather hose 12 is connected to the filler neck 11. Next, the breather hose 12 is moved in the longitudinal direction of the side member 20 along the slope 23b forming the mountain shape of the bulging portion 23, and is fitted into the groove 24 of the bulging portion 23 as shown in FIG.

  As shown in FIG. 5, a protective cover 3 is attached below the fuel filler hose 14 and the filler neck 11, and the protective cover 3 is attached to the bracket of the filler neck 11 with a clip or an engaging claw. Yes. As shown in FIG. 1, the fuel tank 10 of the present embodiment is disposed at the rear of the vehicle, and the fuel filler port is disposed at the rear of the rear wheel. Therefore, the fuel filler hose 14 that is a rubber hose has a rear wheel. There is a risk of mud and stones coming from the road. Further, since the fuel filler hose 14 is piped at a low position below the side member 20, the protective cover 3 is provided to improve durability.

  The breather hose 12 of the fuel tank 10 attached to the vehicle body 1 in this manner is sandwiched between the side member 20 and the deck 2 via the elastic member 13, as shown in FIGS. That is, one end of the breather hose 12 is clamped and fixed to the inlet pipe formed in the fuel tank 10 with a clamp, and the other end of the breather hose 12 is clamped and fixed to the breather pipe formed on the filler neck 11. The intermediate position of the breather hose 12 is sandwiched between the side member 20 and the deck 2. Furthermore, since the intermediate position which is the uppermost part is passed through the upper side of the side member 20, the breather hose 12 can be reliably positioned and vibrations thereof can be prevented.

According to the above embodiment, the breather hose 12 is passed between the upper surface 22a of the cover 22 of the side member 20 (the portion other than the bulging portion 23) and the deck 2, and then the breather hose 12 is formed in the mountain shape of the bulging portion 23. The breather hose 12 is disposed in the groove 24 between the bulging portion 23 and the deck 2 by moving in the longitudinal direction of the side member 20 along the inclined surface 23b. Thus, a fixing member such as a clamp is not required. The breather hose 12 can be reliably fixed with a simple configuration. Further, since the clamping work is not necessary for fixing the breather hose 12, the gap between the side member 20 and the deck 2 can be minimized. Therefore, since the height of the deck 2 can be suppressed, loading and unloading work is facilitated and the merchantability is improved. Since the breather hose 12 is disposed in the groove 24 between the bulging portion 23 and the deck 2, the breather hose 12 is positioned in the front-rear direction of the vehicle and can be reliably fixed.
Since the breather hose 12 is covered with the elastic member 13 that is more elastic than the breather hose 12, the contact portion of the breather hose 12 can be protected by the covering member. Therefore, durability can be improved. Even if the gap between the bulging portion 23 and the lower surface of the deck 2 varies, the breather hose 12 can be reliably held by the elasticity of the covering member, so that the durability of the breather hose 12 itself is improved.

  Needless to say, the present invention is not limited to the above-described embodiment, and can be implemented with appropriate modifications within the scope not changing the gist of the present invention.

It is the side view which showed the state which gave the breather hose piping structure of the fuel tank in the vehicle which concerns on this invention to the truck. It is the side view which expanded and showed the A section in FIG. It is the perspective view which showed a part of side member applied to the breather hose piping structure of the fuel tank in the vehicle which concerns on this invention. It is the perspective view from the upper part which showed the arrangement | positioning aspect of the fuel filler neck and breather hose of a fuel tank. It is the perspective view from the lower part which showed the arrangement | positioning aspect of the fuel filler neck and breather hose of a fuel tank. It is the VI-VI sectional view taken on the line in FIG. It is the VII-VII sectional view taken on the line in FIG.

Explanation of symbols

1 Car body 2 Deck 3 Protective cover 4 Bolt 10 Fuel tank
DESCRIPTION OF SYMBOLS 11 Fuel filler neck 12 Breather hose 13 Elastic member 14 Fuel filler hose 15 Filler cap 20 Side member 21 Lower member 22 Cover 22a Upper surface 23 Bulging part 23a Top surface 23b Inclined surface
24 groove 25 screw hole

Claims (4)

A fuel filler is disposed between the left and right side members extending in the longitudinal direction of the vehicle under the deck, and the fuel filler hose of the fuel tank is attached to the side surface of the side member of the vehicle body under the one side member. In the fuel tank breather hose piping structure in the vehicle, which is connected to the neck and connects the breather hose of the fuel tank to the upper portion of the fuel filler neck through the one side member and the deck,
A part of the upper surface of the side member is inflated upward to form a bulging portion, and the breather hose is sandwiched and fixed between the top surface of the bulging portion and the bottom surface of the deck. Breather hose piping structure.   The breather hose piping structure for a fuel tank in a vehicle according to claim 1, wherein a groove for accommodating the breather hose is formed on a top surface of the bulging portion.   The breather hose piping structure for a fuel tank in a vehicle according to claim 1 or 2, wherein an upper surface of the side member and a top surface of the bulging portion are continuous by an inclined surface. The breather hose for a fuel tank in a vehicle according to any one of claims 1 to 3, wherein a portion of the breather hose corresponding to the groove is covered with an elastic member having elasticity more than that of the breather hose. Piping structure.

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