JP6344189B2 - Fuel tank mounting structure - Google Patents

Description

  The present invention relates to a fuel tank mounting structure for mounting a fuel tank to a vehicle body.

  2. Description of the Related Art A fuel tank mounting structure for mounting a fuel tank to a vehicle body using a long tank band is known as a fuel tank mounting structure for mounting a fuel tank of an automobile to the vehicle body. For example, in the fuel tank mounting structure disclosed in Patent Document 1, both ends of the tank band are fastened and fixed to the vehicle body to support the fuel tank from the lower side of the vehicle, and the flange portion provided on the fuel tank is fastened to the tank band. The fuel tank is attached to the vehicle body by being fastened and fixed to the vehicle body at a position different from the position.

JP 2003-054272 A

  By the way, in the fuel tank mounting structure disclosed in Patent Document 1, since both ends of the tank band and the flange of the fuel tank are fastened and fixed at different positions on the vehicle body, the fastening points tend to increase.

  In view of the above facts, the present invention has an object to provide a fuel tank mounting structure that can reduce the fastening points for mounting the fuel tank to the vehicle body.

The fuel tank mounting structure according to claim 1 of the present invention is disposed below the vehicle floor panel, a fuel tank provided with a flange on the outer periphery, and disposed below the vehicle than the floor panel, One end is fixed to the vehicle body by fastening together with the flange portion and a fastener via a vibration isolator, and the other end is directly fixed to the vehicle body by a fastener, and supports the fuel tank from the vehicle lower side. And comprising.
A fuel tank mounting structure according to a second aspect of the present invention is the fuel tank mounting structure according to the first aspect, wherein the fuel tank mounting structure is made of metal, the upper end portion comes into contact with the vehicle body, and the lower end portion passes through the vibration isolator. A substantially cylindrical tube member that comes into contact with the one end fixed to the vehicle body by co-tightening with the flange portion and a fastener in the support member, and penetrates a through hole formed in the flange portion; and rubber An anti-vibration rubber having a substantially cylindrical shape that is disposed in contact with the outer periphery of the cylindrical member and is held in a state where the outer peripheral portion is inserted through the through hole. .
According to a third aspect of the present invention, there is provided the fuel tank mounting structure according to the second aspect, wherein the anti-vibration rubber has an annular groove formed on an outer periphery thereof, and an edge of the through hole is held in the groove. Is done.

In the fuel tank mounting structure according to claim 1, since the flange portion of the fuel tank and a part of the support member are fixed to the vehicle body by joint fastening with a fastener, for example, the flange portion of the fuel tank and the support member The fastening point for attaching the fuel tank to the vehicle body can be reduced as compared with a case where a part of the fuel tank is fixed to a different position of the vehicle body with a fastener.
In the fuel tank mounting structure according to the second aspect, the flow sound (vibration) of the fuel flowing in the fuel tank is transmitted to the rubber anti-vibration rubber through the through hole formed in the flange portion of the fuel tank. As a result, the vibration of the fuel tank is attenuated, and consequently the flow noise of the fuel flowing through the fuel tank is attenuated. Further, the upper end portion and the lower end portion of the metal cylinder member come into contact with the vehicle body and one end of the support member, respectively. Thereby, the contact area of a vibration isolator, a vehicle body, and a support member can be increased, and it can fasten firmly.
In the fuel tank mounting structure according to the third aspect, an annular groove is formed on the outer periphery of the vibration-proof rubber, and the edge of the through hole is held in the groove. As a result, the anti-vibration rubber and the upper and lower edge portions of the through hole formed in the flange portion of the fuel tank come into contact with each other, and the vibration of the fuel tank in the vehicle vertical direction and horizontal direction is attenuated. The flow noise of the fuel flowing inside is attenuated.

  The fuel tank mounting structure according to claim 1 of the present invention has an excellent effect that the fastening point for mounting the fuel tank to the vehicle body can be reduced.

It is a perspective view which shows the fuel tank mounting structure of 1st Embodiment of this invention. It is the expanded sectional view which expanded the 2-2 line cross section of FIG.

  Hereinafter, an embodiment of the fuel tank mounting structure of the present invention will be described with reference to FIGS. 1 and 2. It should be noted that an arrow UP appropriately shown in these drawings indicates the upper side of the vehicle, and an arrow FR indicates the front side of the vehicle.

  As shown in FIG. 2, the fuel tank mounting structure 10 of this embodiment is a structure for mounting a fuel tank 14 to a vehicle body 12 of an automobile. The fuel tank mounting structure 10 includes a fuel tank 14 and a tank band 16 as an example of a support member that is fastened and fixed to the vehicle body 12 (fixed by a fastener) and supports the fuel tank 14 from the lower side of the vehicle. Yes.

  The fuel tank 14 is made of resin and can accommodate automobile fuel therein. The fuel tank 14 is disposed below the vehicle on the floor panel 18 of the vehicle body 12, and an elastically deformable cushion material 20 (for example, rubber) is interposed between the tank upper surface 14 </ b> A and the lower surface 18 </ b> A of the floor panel 18. In this state, the tank band 16 supports the vehicle from below. The present invention is not limited to the above-described configuration, and the fuel tank 14 has an elastically deformable cushion material 20 interposed between a tank upper surface 14A and members (for example, brackets and various members) attached to the floor panel 18. In this state, the tank band 16 may support the vehicle from below.

  A plate-like flange portion 22 is provided on the outer periphery of the fuel tank 14 so as to project in a direction intersecting the vehicle vertical direction (in the present embodiment, a direction orthogonal). Specifically, a plurality (two in the present embodiment) of the flange portions 22 are provided on the tank front surface 14B on the vehicle front side of the fuel tank 14 with an interval in the vehicle width direction. The flange portion 22 is formed with a through hole 26 through which a shaft portion of a bolt 24 (in this embodiment, a flanged bolt) as an example of a fastener passes.

  A plurality of (two in this embodiment) concave grooves 28 that are recessed inside the fuel tank 14 and that extend in the vehicle front-rear direction are formed in the lower portion of the fuel tank 14. A tank support portion 16 </ b> A (described later) of the tank band 16 enters the concave groove 28. Specifically, the tank support portions 16 </ b> A of the corresponding tank bands 16 enter the respective concave grooves 28.

  As shown in FIG. 1, the tank band 16 is formed by bending a long metal plate into a hat shape. The tank band 16 is disposed below the vehicle with respect to the floor panel 18 of the vehicle body 12, and the fuel tank 14 is disposed from the vehicle lower side with a cushion material 20 interposed between the tank upper surface 14 </ b> A and the lower surface 18 </ b> A of the floor panel 18. I support it. Specifically, the tank band 16 has a posture in which one end portion in the longitudinal direction (vehicle body fixing portion 16B) and the other end portion (vehicle body fixing portion 16C) are positioned above the central portion in the longitudinal direction (tank support portion 16A). (See FIG. 2), the fuel tank 14 is fastened and fixed to the vehicle body 12, and the fuel tank 14 is supported from the lower side of the vehicle in a state where the tank support portion 16A enters the concave groove 28 of the fuel tank 14.

  The tank band 16 will be described in detail. The center portion in the longitudinal direction is a tank support portion 16A, and one end portion in the longitudinal direction is fastened and fixed to the floor panel 18 with a bolt 24 via a bracket 30 ( The other end portion in the longitudinal direction is a vehicle body fixing portion 16C (see FIG. 1) that is fastened and fixed to the floor panel 18 by a bolt 24 via a bracket (not shown). Further, a portion between the center portion and one end portion of the tank band 16 in the longitudinal direction is a connecting portion 16D (see FIG. 2) that connects the tank support portion 16A and the vehicle body fixing portion 16B. A portion between the first end portion and the other end portion is a connecting portion 16E (see FIG. 1) that connects the tank support portion 16A and the vehicle body fixing portion 16C. In the present embodiment, as shown in FIG. 1, one end of the tank band 16 in the longitudinal direction is disposed in the front of the vehicle, and the other end in the longitudinal direction is disposed in the rear of the vehicle.

  The vehicle body fixing portion 16B and the vehicle body fixing portion 16C are respectively formed with through holes 32 through which the shaft portion of the bolt 24 passes.

  As shown in FIG. 2, a substantially cylindrical vibration isolator 34 is disposed between the vehicle body fixing portion 16 </ b> B and the bracket 30, and the shaft portion of the bolt 24 penetrates the vibration isolator 34. doing. The bolt 24 passes through the through hole 32 of the vehicle body fixing portion 16B, the inside of the vibration isolator 34 and the through hole 36 formed in the bracket 30, and the front end of the shaft portion is the upper edge of the through hole 36 of the bracket 30. Is screwed into a nut 38 disposed in In other words, the vehicle body fixing portion 16 </ b> B of the tank band 16 and the vibration isolator 34 are fastened and fixed to the floor panel 18 of the vehicle body 12 via the bracket 30 by joint fastening with the bolts 24. In the present embodiment, since the flange portion 22 of the fuel tank 14 and the vibration isolator 34 are connected, the flange portion 22 and the vibration isolator 34 together with the vibration isolator 34 are fastened together with the bolts 24 via the bracket 30. It is fastened and fixed to the floor panel 18. In other words, the flange portion 22 and the vehicle body fixing portion 16 </ b> B are fastened and fixed to the vehicle body 12 by the bolts 24 through the vibration isolator 34.

  As shown in FIG. 2, the vibration isolator 34 includes a substantially cylindrical tube member 40 that passes through the through hole 26 of the flange portion 22, and a substantially cylindrical vibration isolator disposed along the outer periphery of the tube member 40. Rubber 42.

  An annular flange 44 projecting radially outward is formed at one end of the cylindrical member 40 in the axial direction (end on the side of the vehicle body fixing portion 16B), and the other axial end of the cylindrical member 40 (the bracket 30). An annular flange 46 projecting radially outward is formed at the end of the side, and an anti-vibration rubber 42 is disposed between the flange 44 and the flange 46 so that the anti-vibration rubber 42 is a cylindrical member. 40 is held on the outer periphery. In the present embodiment, the outer diameter of each of the flange portion 44 and the flange portion 46 is larger than the inner diameter of the through hole 26 of the flange portion 22. Note that the cylindrical member 40 of the present embodiment is formed by connecting a metal collar 48 in which the collar portion 44 is formed and a metal collar 50 in which the collar portion 46 is formed.

  A small-diameter portion 42 </ b> A that penetrates the through hole 26 of the flange portion 22 is formed in the middle portion in the axial direction of the anti-vibration rubber 42. The outer peripheral surface of the small diameter portion 42 </ b> A is in contact with the hole wall surface of the through hole 26. Further, large-diameter portions 42B having a diameter larger than that of the small-diameter portion 42A are formed on both axial sides of the small-diameter portion 42A of the vibration-proof rubber 42, and there is a difference in diameter between the small-diameter portion 42A and the large-diameter portion 42B. Thus, a step portion 42C is formed. The edge portion of the through hole 26 of the flange portion 22 is in contact with the step portion 42 </ b> C of the vibration isolating rubber 42. Specifically, the upper edge portion of the through hole 26 of the flange portion 22 abuts on the step portion 42C above the vehicle, and the lower edge portion of the through hole 26 of the flange portion 22 contacts the step portion 42C below the vehicle. It is in contact. Since the flange portion 22 of the fuel tank 14 is thus connected to the cylindrical member 40 via the vibration isolating rubber 42, the flow sound (vibration) of the fuel flowing through the fuel tank 14 is attenuated by the vibration isolating rubber 42. The transmission of the cylindrical member 40 to the vehicle body 12 through the bracket 30 to which the cylindrical member 40 is fastened and fixed is suppressed.

Next, the operation of the fuel tank mounting structure 10 of this embodiment will be described.
In the fuel tank mounting structure 10, the flange portion 22 of the fuel tank 14 and the vehicle body fixing portion 16 </ b> B of the tank band 16 are fixed to the vehicle body 12 via the flange portion 22 by tightening with bolts 24 via the vibration isolator 34. Therefore, for example, compared to fixing the flange portion 22 and the vehicle body fixing portions 16B and 16C of the tank band 16 at different positions of the vehicle body 12 with bolts 24, fastening for attaching the fuel tank 14 to the vehicle body 12 is performed. Points can be reduced. Thereby, the quantity of the bolts 24 for attaching the fuel tank 14 to the vehicle body 12 can be reduced. Moreover, the fastening work of the bolt 24 can be reduced.

  In the fuel tank mounting structure 10, since the fuel tank 14 is made of resin, the flange portion 22 tends to extend due to resin swelling. However, the vibration isolator 34 and the vehicle body fixing portion 16 </ b> B are connected together by the bolt 24. Since it fixes to the vehicle body 12 by fastening, the flange part 22 connected to the vibration isolator 34 is restrained by the tank band 16, and a deformation | transformation (elongation deformation | transformation) of the flange part 22 is suppressed.

  Further, in the fuel tank mounting structure 10, the fuel tank 14 is supported from the vehicle lower side with the tank band 16 interposed between the tank upper surface 14 </ b> A and the lower surface 18 </ b> A of the floor panel 18 with the cushion material 20 interposed therebetween. Since the floor panel 18 is firmly restrained, the load of the fuel tank 14 acting on the flange portion 22 is reduced. Therefore, it is not necessary to increase the rubber hardness in order to suppress the sag of the anti-vibration rubber 42, and the anti-vibration is within a range that can effectively reduce the flow noise of the fuel in the fuel tank 14 from being transmitted to the vehicle body 12. The hardness of the rubber 42 can be set. As a result, the effect of reducing the transmission sound of the fuel in the fuel tank 14 to the vehicle body 12 can be easily obtained.

  Furthermore, in the fuel tank mounting structure 10 of the present embodiment, since the two flange portions 22 are provided on the tank front surface 14B with an interval in the vehicle width direction, the two flange portions 22 and the two tank bands 16 are provided. By fixing the vehicle body fixing portion 16B to the vehicle body 12 by fastening together with the bolts 24, the fuel tank 14 can be easily positioned. In addition, this invention is not limited to the said structure, You may provide the flange part 22 other than the tank front surface 14B of the fuel tank 14. FIG.

  In the above-described embodiment, the fuel tank 14 is made of resin, but the present invention is not limited to this configuration, and the fuel tank 14 may be made of metal.

  In the above-described embodiment, the flange portion 22 and the vehicle body fixing portion 16B are fastened and fixed to the vehicle body 12 through the vibration isolator 34, but the present invention is not limited to this configuration. For example, without using the vibration isolator 34, the flange portion 22 and the vehicle body fixing portion 16B may be fastened and fixed to the vehicle body 12 together.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and various modifications other than the above can be implemented without departing from the spirit of the present invention. Of course.

DESCRIPTION OF SYMBOLS 10 Fuel tank mounting structure 12 Car body 14 Fuel tank 16 Tank band (support member)
18 Floor panel 22 Flange 24 Bolt (fastener)

Claims (3)

A fuel tank disposed below the vehicle floor panel and having a flange on the outer periphery;
The vehicle is disposed below the floor panel, and one end is fixed to the vehicle body by fastening with the flange portion and a fastener through a vibration isolator, and the other end is directly fixed to the vehicle body with a fastener, A support member that supports the fuel tank from below the vehicle;
A fuel tank mounting structure comprising: The vibration isolator is
The one end that is made of metal, has an upper end that comes into contact with the vehicle body, and a lower end that is fixed to the vehicle body by tightening the flange portion and a fastener in the support member via the vibration isolator. A substantially cylindrical tubular member that hits the surface and penetrates the through hole formed in the flange portion;
It is made of rubber, and is arranged in a state of being in contact with the outer periphery of the cylindrical member, and has a substantially cylindrical vibration-proof rubber that is held in a state where the outer peripheral portion is inserted through the through hole,
The fuel tank mounting structure according to claim 1, comprising: The anti-vibration rubber has an annular groove formed on the outer periphery, and the edge of the through hole is held in the groove.
  The fuel tank mounting structure according to claim 2.