JP6688473B2 - Vehicle fuel tank mounting structure - Google Patents

Description

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

  Patent Document 1 describes a structure in which two high-pressure tanks are obliquely arranged so that one of the high-pressure tanks is located at a high position so that the tank can be mounted in a small tank mounting space. Further, the same publication shows a state in which two high pressure tanks having the same outer diameter are obliquely arranged.

JP, 2009-101866, A

  In the structure of Patent Document 1, the two tanks (fuel tanks) have the same outer diameter, and the tanks have the same capacity. Therefore, when the total capacity of the two tanks is increased, the area where the tanks are arranged is also expanded. As a result, it is difficult to arrange them efficiently in a small area.

  Therefore, an object of the present invention is to provide a fuel tank mounting structure capable of increasing the total capacity of two fuel tanks while efficiently disposing the two fuel tanks in a narrow area.

In order to solve the above problems, a first aspect of the present invention is a first fuel tank having a first cylindrical portion having a circular cross section centered on a first axis intersecting with a vertical direction and mounted on a vehicle body side. A fuel tank mounting structure for a vehicle, comprising: a second fuel tank mounted on the vehicle body side, the second fuel tank having a second cylindrical portion having a circular cross section centered on a second axis intersecting with the vertical direction; fuel tank, the second axis is Ri Do the first axis substantially parallel with the oblique upward or obliquely below the first axis, and a vertical upward or vertical second fuel tank as viewed from below the first fuel tank and partially It is arranged in parallel like the first fuel tank to overlap with so that the outer diameter of the second cylindrical portion is larger than the outer diameter of the first cylindrical portion.

  In the above configuration, the second fuel tank is arranged in parallel with the first fuel tank such that the second axis is substantially above or below the first axis and is substantially parallel to the first axis. In such an arrangement, the outer diameter of the second cylindrical portion is set to be larger than the outer diameter of the first cylindrical portion to increase the capacity of the second fuel tank than the capacity of the first fuel tank. As compared with the case where the outer diameters of the first portion and the second cylindrical portion are set to be equal and the first fuel tank and the second fuel tank have the same capacity, the two fuel tanks are efficiently arranged in a narrow area, and The total capacity of the book fuel tank can be increased.

  A second aspect of the present invention is the fuel tank mounting structure according to the first aspect, which includes a tank support bracket, a first band, and a second band.

The tank support bracket is recessed in an arc shape along the lower portion of the outer peripheral surface of the first cylindrical portion, and has a first recess for supporting the first cylindrical portion from below and an arc shape along the lower portion of the outer peripheral surface of the second cylindrical portion. And a second concave portion for supporting the second cylindrical portion from below, and a template portion formed with the second concave portion, and is fixed to the vehicle body side. The first band is hung on the upper portion of the outer peripheral surface of the first cylindrical portion supported by the first recess to bind the first fuel tank to the tank support bracket. The second band is hung on the upper part of the outer peripheral surface of the second cylindrical portion supported by the second recess to bind the second fuel tank to the tank support bracket. The mold plate portion is formed with an opening that enables the work of connecting the first band and the second band to the tank support bracket in the axial direction of the first shaft and the second shaft.

  In the above structure, the first fuel tank and the second fuel tank are bound to the tank support bracket independently by the first band and the second band, so that the two fuel tanks are joined by the one band to the tank support bracket. The fuel tanks can be tightly bound as compared with the case where the fuel tanks are bound together, and the mounting state of the fuel tanks is stabilized.

  According to the present invention, the total capacity of two fuel tanks can be increased while efficiently disposing the two tanks in a narrow area.

It is a top view of a truck to which a fuel tank mounting structure according to the present invention is applied. It is a top view of the principal part of FIG. It is a side view of the fuel tank unit of FIG. It is the perspective view which looked at the fuel tank unit of Drawing 2 from the slanting upper back. FIG. 3 is a perspective view of the fuel tank unit of FIG. 2 as viewed obliquely from above and above. FIG. 3 is a perspective view of the tank support bracket on the rear side of FIG. 2 as viewed obliquely from above and rear. FIG. 7 is a sectional view taken along the line VII-VII of FIG. 4. FIG. 3 is a front view of the tank support bracket of FIG. 2.

  An embodiment of the present invention will be described below with reference to the drawings. In each drawing, FR indicates the front of the vehicle, UP indicates the upper side, and IN indicates the inner side in the vehicle width direction. Further, in the following description, the left-right direction means the left-right direction when facing the front of the vehicle.

  As shown in FIG. 1, a vehicle to which the fuel tank mounting structure according to the present embodiment is applied is a natural gas vehicle that drives an engine (not shown) using natural gas as a fuel, and includes a ladder-shaped body frame 2. It is a large truck (vehicle) 1 that has. A cab 5 is mounted above the front end of the vehicle body frame 2. The truck 1 has front wheels (not shown) arranged below both left and right sides of the cab 5, and rear front wheels 6 and rear rear wheels 7 arranged on both left and right sides of the body frame 2 behind the cab 5.

  The body frame 2 includes a pair of left and right side members 3 each having a substantially U-shaped cross section and extending in the vehicle width direction on both sides of the truck 1 in the vehicle width direction, and between the left and right side members 3 extending in the vehicle width direction. It is formed in a ladder shape by a plurality of cross members 4 having a substantially U-shaped cross section that connect the three. Plural (five in this embodiment) fuel tank units are fixed to the left and right side members 3. Two fuel tank units 11 and 90 are fixed to the right side member 3, one between the front wheel and the rear front wheel 6 and one behind the rear rear wheel 7. Two fuel tank units 10, 11, 90 are fixed to the left side member 3 between the front wheel and the rear front wheel 6, and one fuel tank unit 10, 11, 90 behind the rear rear wheel 7. The three fuel tank units 10 and 11 in front of the rear front wheels 6 each include two fuel tanks, and the two fuel tank units 90 behind the rear front wheels 6 each include one fuel tank. Below, the fixing structure of the foremost fuel tank unit 10 fixed to the left side member 3 will be described. The other two fuel tank units 11 including the two fuel tanks have the same structure as the fuel tank unit 10.

  As shown in FIGS. 2 and 3, the fuel tank unit 10 includes a first fuel tank 80, a second fuel tank 81, a pair of front and rear tank support brackets 12F and 12R, and a front side movement restricting member 14. The rear movement restricting member 15 is provided.

  The first fuel tank 80 includes a cylindrical tank body portion (first cylindrical portion) 80a having a circular cross section around the first shaft 82, and a tank body that bulges in a curved shape from both ends of the tank body portion 80a. The tank body 80a integrally has a pair of front and rear hemispherical tank ends 80b and 80c for closing both ends of the portion 80a, and the tank body 80a is in the vehicle width direction of the left side member 3 (hereinafter, simply referred to as side member 3). It is fixed to the front and rear tank support brackets 12F and 12R in a state of extending in the front-rear direction on the outside (a state where the first shaft 82 is arranged along the front-rear direction). A neck portion 84 is provided at the front end of the front tank end portion 80b. A container main valve 85 for connecting a fuel supply device (not shown) and a fuel pipe (not shown) connected to a gas filling port (not shown) is attached to the neck portion 84. The container valve 85 has a built-in overflow prevention valve and a safety valve.

  The second fuel tank 81 has a cylindrical tank body portion (second cylindrical portion) 81a having a circular cross section around the second shaft 83, and a tank body that bulges in a curved shape from both ends of the tank body portion 81a. It integrally has a pair of hemispherical front and rear tank end portions (second end surface portions) 81b and 81c that close both ends of the portion 81a, and the tank body portion 82a is diagonally outward of the first fuel tank 80 in the vehicle width direction. Front and rear tanks in a state of extending in the front-rear direction below (a state in which the second shaft 83 is arranged in parallel with the first fuel tank 80 such that the second shaft 83 is obliquely below the first shaft 82 and substantially parallel to the first shaft 82). It is fixed to the support brackets 12F and 12R. The entire length of the second fuel tank 81 (the length along the second axis 83) is formed to be substantially equal to the entire length of the first fuel tank 80 (the length along the first axis 82). The outer diameter of the tank body 81a is formed larger than that of the tank body 80a of the first fuel tank 80. A neck portion 86 is provided at the front end of the front tank end portion 81b. A container main valve 87 for connecting a fuel supply device (not shown) and a fuel pipe (not shown) connected to a gas filling port (not shown) is attached to the neck portion 86. The container valve 87 has a built-in overflow prevention valve and a safety valve.

  The first fuel tank 80 and the second fuel tank 81 are a metal tank, an aluminum liner composite tank in which an aluminum liner is reinforced with fiber reinforced plastic, or a plastic liner composite tank in which a plastic liner is reinforced with fiber reinforced plastic (all composite). Manufactured tank). In the present embodiment, a composite tank is used for the first fuel tank 80 and a metal tank is used for the second fuel tank 81. That is, the first fuel tank 80 and the second fuel tank 81 are made of different materials and have different thermal expansion coefficients. The natural gas stored in the first fuel tank 80 and the second fuel tank 81 is, for example, compressed natural gas (CNG: Compressed Natural Gas) stored in a high pressure state as a gas, or a fuel container as a cryogenic container in a liquid state. Liquefied Natural Gas (LNG) stored therein, and adsorbed Natural Gas (ANG) stored by being adsorbed by an adsorbent in a fuel container.

  As shown in FIGS. 2 to 8 (particularly FIGS. 6 and 8), the front and rear tank support brackets 12F and 12R include a fixed portion 12a extending in the vertical direction, a support portion 12b extending in the vehicle width direction, and front and rear molds. The first fuel tank 80 is a substantially L-shaped member that integrally includes a plate portion 12c, a first support plate portion (first recess) 12d, and a second support plate portion (second recess) 12e. Of the tank body 80a of the second fuel tank 81 and the tank body 81a of the second fuel tank 81 are arranged on the outer side in the vehicle width direction of the side member 3 so as to be spaced apart from each other in the front-rear direction by a distance shorter than the length in the front-rear direction and fixed to the side member 3. To be done.

  The fixing portion 12a extends vertically along the vehicle width direction outer side surface 3a of the side member 3 from the vicinity of the upper end of the side member 3 to a position lower than the side member 3 and extends to the vehicle width direction outer side surface 3a of the side member 3. It is fastened and fixed by a plurality of bolts 19. The support portion 12b extends substantially horizontally outward from the lower end of the fixed portion 12a in the vehicle width direction.

  The front and rear mold plate portions 12c are plate bodies that are spaced apart in the front-rear direction and face each other, and the front mold plate portion 12c is fixed to the front surface of the fixed portion 12a and the front surface of the support portion 12b, and the rear mold portion 12c. The plate portion 12c is fixed to the rear surface of the fixed portion 12a and the rear surface of the support portion 12b. The front and rear template portions 12c each have a curved end edge portion 20 that extends from the vehicle width direction outer side of the upper end portion of the fixed portion 12a to the upper side of the support portion 12b in the vehicle width direction outer side. The upper arc portion 20a and the lower arc portion 20b are formed in a W shape that is vertically aligned (see FIG. 8).

  As shown in FIG. 8, the first support plate portion 12d is a substantially arcuate curved plate along the outer surface of the tank body portion 80a of the first fuel tank 80. The second support plate portion 12e is a substantially arc-shaped curved plate along the outer surface of the tank body portion 81a of the second fuel tank 81. The front and rear end edges of the first support plate portion 12d are fixed to the front and rear upper arc portions 20a, and the front and rear end edges of the second support plate portion 12e are fixed to the front and rear lower arc portion 20b. The first support plate portion 12d is recessed in an arc shape along the lower portion of the outer peripheral surface of the tank body portion 80a of the first fuel tank 80, and supports the tank body portion 80a from below. The second support plate portion 12e is recessed in an arc shape along the lower portion of the outer peripheral surface of the tank body portion 81a of the second fuel tank 81, and the tank body portion 81a is obliquely below the tank body portion 80a in the vehicle width direction from below. To support.

  The tank body portion 80a of the first fuel tank 80 is bound to the front and rear tank support brackets 12F and 12R by the first fixing belt (first band) 21 while being placed on the first support plate portion 12d. The tank body portion 81a of the second fuel tank 81 is bound to the front and rear tank support brackets 12F and 12R by the second fixing belt (second band) 22 while being placed on the second support plate portion 12e.

  As shown in FIGS. 6 and 8, the first fixing belt 21 and the second fixing belt 22 are inserted through a belt insertion portion at a portion adjacent to the lower end of the first supporting plate portion 12d and the upper end of the second supporting plate portion 12e. The hole 23 is formed across the first support plate portion 12d and the second support plate portion 12e. Belt connecting plates 24 are fixed to the front and rear mold plate portions 12c inside the belt insertion hole 23.

  The first upper connecting pin 25 is attached to one end of the first fixing belt 21, and the one end of the first fixing belt 21 is connected to the upper end of the fixing portion 12 a via the first upper connecting pin 25. . A first lower connecting pin 26 having a bolt shaft portion 26a is attached to the other end of the first fixing belt 21, and a bolt insertion hole (not shown) is formed in the belt connecting plate 24. By inserting the bolt shaft portion 26a of the first lower connecting pin 26 into the bolt insertion hole, and screwing the nut 27 into the bolt shaft portion 26a protruding obliquely downward from the belt connecting plate 24, the first fixing belt 21 The ends are connected to the belt connecting plate 24. The tank body portion 80a of the first fuel tank 80 is placed on the first support plate portion 12d, the first upper connecting pin 25 is connected to the fixing portion 12a, and the first fixing belt 21 is attached to the outer peripheral surface of the tank body portion 80a. The tank body portion 80a of the first fuel tank 80 is hooked on the upper portion, the bolt shaft portion 26a of the first lower connecting pin 26 is inserted into the bolt insertion hole, and the nut 27 is screwed into the bolt shaft portion 26a to be tightened. Are bound and fixed to the tank support brackets 12F and 12R.

  A second upper connecting pin 28 is attached to the upper end of the second fixing belt 22, and the upper end of the second fixing belt 22 is connected to the belt connecting plate 24 via the second upper connecting pin 28. A second lower connecting pin 29 having a bolt shaft portion 29a is attached to the other end portion of the second fixing belt 22, and a bolt insertion hole 30 is formed at an outer end portion of the support portion 12b in the vehicle width direction. The other end of the second fixed belt 22 is obtained by inserting the bolt shaft portion 29a of the second lower connecting pin 29 into the bolt insertion hole 30 and screwing the nut 31 into the bolt shaft portion 29a protruding downward from the support portion 12b. The portion is connected to the support portion 12b. The tank body 81a of the second fuel tank 81 is placed on the second support plate 12e, the second upper connecting pin 28 is connected to the belt connecting plate 24, and the second fixing belt 22 is attached to the outer peripheral surface of the tank body 81a. The bolt shaft portion 29a of the second lower connecting pin 29 is inserted into the bolt insertion hole 30 and the nut 31 is screwed into the bolt shaft portion 29a to tighten the bolt shaft portion 29a. The portion 81a is bound and fixed to the tank support brackets 12F and 12R.

The mold plate portion 12c, including the fastening operation of the first connecting work of fixing belt 21 and the second fixing belt 22 (first lower connecting pins 26 and the second upper pin 2 8) (the nut 27 relative to the belt coupling plate 24 ) Is formed from the front outer side or the rear outer side of the tank support brackets 12F and 12R. The opening 32 may be provided on both the front and rear template portions 12c, or may be provided on only one of them.

  With the first fuel tank 80 fixed to the front and rear tank support brackets 12F and 12R, the front end of the first fuel tank 80 is arranged in front of the front tank support bracket 12F, and the rear end of the first fuel tank 80 The end is arranged behind the rear tank support bracket 12R. Similarly, in the state where the second material tank 81 is fixed to the front and rear tank support brackets 12F and 12R, the front end of the second fuel tank 81 is arranged in front of the front tank support bracket 12F, and the second fuel tank The rear end of 81 is arranged rearward of the rear tank support bracket 12R.

  As shown in FIG. 5, the front movement restricting member 14 has a front engagement plate 33 and upper and lower front plate connecting members 34a and 34b.

  The front engagement plate 33 is disposed on the front side of the first fuel tank 80 and the second fuel tank 81 in a posture that intersects with the front-rear direction (a posture that is substantially orthogonal in this embodiment). The front engagement plate 33 integrally includes a polygonal front plate body 35 and a flange portion 36 that is bent backward from the entire outer peripheral edge of the front plate body 35.

  The upper front plate connecting member 34a is fixed to the upper end of the front mold plate portion 12c of the front tank support bracket 12F on the inner side in the vehicle width direction and extends forward, and the front end portion is on the inner side of the front plate body 35 in the vehicle width direction. It is joined to the rear surface of the upper end. The lower front plate connecting member 34b is fixed to the lower end of the outer edge of the front template plate 12c in the vehicle width direction and extends forward. Be combined. By connecting the front plate main body 35 to the upper and lower front plate connecting members 34a and 34b, the front engagement plate 33 is fixed forward of the tank support bracket 12F by a predetermined distance.

  The front plate body 35 is formed with a front first engagement hole 37 and a front second engagement hole 38 which penetrate in the front-rear direction. The front first engagement hole 37 has a circular shape with a smaller diameter than the tank body portion 80a of the first fuel tank 80, and the front second engagement hole 38 has a smaller diameter than the tank body portion 81a of the second fuel tank 81. It has a round shape. The front first engaging hole 37 is formed at a position where the front tank end portion 80b of the first fuel tank 80 placed on the front and rear tank support brackets 12F and 12R can be engaged from the rear side. The front second engagement hole 38 is formed at a position where the front tank end portion 81b of the second fuel tank 81 mounted on the front and rear tank support brackets 12F and 12R can be engaged from the rear side. By engaging the front tank end portion 80b with the front first engagement hole 37 from the rear side, the first fuel tank 80 is positioned in the front-rear direction and the first fuel tank 80 is moved to the front side. Be blocked. Further, by engaging the front tank end portion 81b with the front second engagement hole 38 from the rear side, the second fuel tank 81 is positioned in the front-rear direction, and the front side of the second fuel tank 81 is positioned. Movement is blocked.

  The neck portion 84 and the container main valve 85 of the first fuel tank 80 are exposed to the front side from the front first engagement hole 37, and the neck portion 86 and the container main valve 87 of the second fuel tank 81 are the front second engagement. It is exposed from the hole 38 to the front side.

  As shown in FIGS. 4, 6 and 7, the rear movement restricting member 15 includes a rear first engaging plate 40, upper and lower rear first plate connecting members 41 and 42, and a rear second engaging plate. 43 and upper and lower rear second plate connecting members 44 and 45. A plate coupling bracket 46 is fixed to the rear surface of the template plate 12c on the rear side of the rear tank support bracket 12R (see FIG. 6).

  The plate connecting bracket 46 is a plate-like member that is bent in a substantially S shape, and includes a front end portion 47 fixed to the template 12 c, an intermediate portion 48 that bends from the front end portion 47 and extends rearward, and an intermediate portion 48. It integrally has a plate support portion 49 fixed to the rear end portion. The plate support portion 49 is arranged at a position separated rearward from the vicinity of the boundary between the first support plate portion 12d and the second support plate portion 12e of the rear tank support bracket 12R.

  The rear first engagement plate 40 is arranged on the rear side of the first fuel tank 80 in a posture that intersects with the front-rear direction (a posture that is substantially orthogonal in the present embodiment). The rear first engaging plate 40 integrally has a polygonal rear first plate body 50 and a flange portion 51 bent forward from the entire outer peripheral edge of the rear first plate body 50.

  The rear second engagement plate 43 is in a posture intersecting the front-rear direction (a posture that is substantially orthogonal in the present embodiment), is on the rear side of the second fuel tank 81, and is diagonally outward in the vehicle width direction of the rear first engagement plate 40. It is located below. The rear second engagement plate 43 integrally has a polygonal rear second plate body 52 and a flange portion 53 that is bent forward from the entire outer peripheral edge of the rear second plate body 52.

  A coupling bracket 54 is fixed to the vehicle width direction inner upper end of the rear template plate 12c on the rear side of the tank support bracket 12R on the rear side. The coupling bracket 54 has two circular bolt insertion holes (not shown). ) Is formed.

  The upper rear first plate connecting member 41 has a plate-shaped portion 56 in which an elongated bolt insertion hole 55 extending in the front-rear direction is formed, and a shaft-shaped portion fixed to the rear end portion of the plate-shaped portion 56 and extending rearward. It has a portion 57, two bolts 58, and two nuts (not shown). The rear end of the shaft-shaped portion 57 is coupled to the front surface of the upper end of the rear first plate body 50 on the inner side in the vehicle width direction. By stacking the plate-shaped portion 56 on the coupling bracket 54 from above, and inserting the bolt 58 into the bolt insertion hole 55 on the plate-shaped portion 56 side and the coupling bracket 54 side and tightening the bolt to the nut, the plate-shaped portion 56 is attached to the coupling bracket 54. Fastened and fixed, the upper portion of the rear first engagement plate 40 is attached to the tank support bracket 12R. Since the bolt insertion hole 55 on the plate-shaped portion 56 side is an elongated hole extending in the front-rear direction, the front-rear position of the rear first engagement plate 40 before fastening can be adjusted.

  The lower rear first plate connecting member 42 is fixed to the plate supporting portion 49 of the plate connecting bracket 46 and extends rearwardly with a first bolt shaft portion 59 and a nut (in the present embodiment) screwed to the first bolt shaft portion 59. In the form, it has a double nut) 60. A bolt insertion hole (not shown) is formed in the rear first plate body 50, and the first bolt shaft portion 59 is inserted into the bolt insertion hole, and the nut 60 is screwed from the rear side to form the rear first plate. The lower portion of the engagement plate 40 is attached to the tank support bracket 12R in a state where it can be tightened to the front side.

  In this way, the upper and lower rear first plate connecting members 41, 42 support the rear first engaging plate 40 rearward of the tank support bracket 12R so as to be movable in the front-rear direction and tightenable to the front side on the vehicle body side. .

  A rear first engaging hole 61 is formed in the rear first plate body 50 so as to penetrate in the front-rear direction. The rear first engagement hole 61 has a circular shape having a diameter smaller than that of the tank body portion 80a of the first fuel tank 80, and is located on the rear side of the first fuel tank 80 mounted on the front and rear tank support brackets 12F and 12R. The tank end portion 80c is formed at a position that can be engaged from the rear side.

  When fixing the first fuel tank 80 to the front and rear tank support brackets 12F and 12R, the tank body 80a is placed on the first support plate 12d, and the front tank end 80b is attached to the front engagement plate 33. The first engaging hole 37 is positioned from the rear side by engaging the first engaging hole 37 from the rear side, the rear first engaging hole 61 of the rear first engaging plate 40 is engaged with the rear tank end portion 80c from the rear side, and the nut 60 is attached. After tightening to determine the front-rear position of the lower portion of the rear first engaging plate 40, the bolt 58 is tightened to fix the upper portion of the rear first engaging plate 40. In this state, the first fuel tank 80 is sandwiched between the front engagement plate 33 and the rear first engagement plate 40 in the front-rear direction and fixed to the vehicle body side, and the first fuel tank 80 moves forward and backward. Are blocked by the front engagement plate 33 and the rear first engagement plate 40. Finally, the tank body 80a is bound to the front and rear tank support brackets 12F and 12R by the first fixing belt 21.

  The upper rear second plate connecting member 44 is fixed to the plate supporting portion 49 of the plate connecting bracket 46 and extends rearward, and the second bolt shaft portion 62 and the nut screwed to the second bolt shaft portion 62 (in the present embodiment). Has a double nut 63. A bolt insertion hole (not shown) is formed in the rear second plate body 52, and the second bolt shaft portion 62 is inserted into this bolt insertion hole, and the nut 63 is screwed from the rear side to form the rear second plate. The upper portion of the engagement plate 43 is attached to the tank support bracket 12R in a state in which it can be tightened forward.

  A coupling bracket 64 is fixed to the vehicle width direction outer lower end portion of the rear template plate 12c on the rear side of the tank supporting bracket 12R on the rear side. The coupling bracket 64 has two circular bolt insertion holes (not shown). ) Is formed.

  The rear second plate connecting member 45 on the lower side is fixed to the plate-shaped portion 66 in which a long bolt-shaped bolt insertion hole (not shown) extending in the front-rear direction is formed, and is fixed to the rear end of the plate-shaped portion 66 to be rearward. It has a shaft-like portion 67 extending to, two bolts 68, and two nuts 69. The rear end portion of the shaft-shaped portion 67 is coupled to the front surface of the lower rear end portion of the rear second plate body 52 in the vehicle width direction. By stacking the plate-shaped portion 66 on the coupling bracket 64 from above and inserting the bolt 68 into the bolt insertion holes on the plate-shaped portion 66 side and the coupling bracket 64 side and tightening the nut 69, the plate-shaped portion 66 is attached to the coupling bracket 64. Fastened and fixed, the lower portion of the rear second engagement plate 43 is attached to the tank support bracket 12R. Since the bolt insertion hole on the plate-shaped portion 66 side is a long hole extending in the front-rear direction, it is possible to adjust the front-rear position of the rear second engagement plate 43 before fastening.

  As described above, the upper and lower rear second plate connecting members 44, 45 are arranged rearward of the tank supporting bracket 12R and obliquely below the rear first engaging plate 40 in the vehicle width direction. , Supported on the vehicle body side so as to be movable in the front-rear direction and tightenable to the front side.

  A rear second engaging hole 70 is formed in the rear second plate body 52 so as to penetrate in the front-rear direction. The rear second engagement hole 70 has a circular shape having a smaller diameter than the tank body portion 81a of the second fuel tank 81, and is located on the rear side of the second fuel tank 81 mounted on the front and rear tank support brackets 12F and 12R. The tank end portion 81c is formed at a position that can be engaged from the rear side.

  When the second fuel tank 81 is fixed to the front and rear tank support brackets 12F and 12R, the tank body 81a is placed on the second support plate 12e, and the front tank end 81b is attached to the front engagement plate 33. The second engagement hole 38 is engaged with the second engagement hole 38 from the rear side for positioning, the rear second engagement hole 70 of the rear second engagement plate 43 is engaged with the rear tank end 81c from the rear side, and the nut 63 is attached. After tightening to determine the front-back position of the upper portion of the rear second engaging plate 43, the bolt 68 is tightened to fix the lower portion of the rear second engaging plate 43. In this state, the second fuel tank 81 is sandwiched between the front engagement plate 33 and the rear second engagement plate 43 in the front-rear direction and fixed to the vehicle body side, and the second fuel tank 81 moves back and forth. Are blocked by the front engagement plate 33 and the rear second engagement plate 43. Finally, the tank body 81a is bound to the front and rear tank support brackets 12F and 12R by the second fixing belt 22.

  As described above, according to the present embodiment, the second fuel tank 81 is provided with the first fuel tank 80 so that the second shaft 83 is substantially parallel to the first shaft 82 diagonally below the first shaft 82. They are arranged in parallel. In such an arrangement, the outer diameter of the tank body 81a of the second fuel tank 81 is set to be larger than the outer diameter of the tank body 80a of the first fuel tank 80, and the tank capacity of the second fuel tank 81 is set to the first fuel. Since the tank capacity is made larger than the tank capacity of the tank 80, the outer diameter of the tank body portion of the first fuel tank and the outer diameter of the tank body portion of the second fuel tank are set equal to each other, and the first fuel tank and the second fuel tank Compared to the case where the tanks have the same capacity, the two fuel tanks (the first fuel tank 80 and the second fuel tank 81) are efficiently arranged in a narrow area while the total capacity of the two fuel tanks is increased. Can be made.

  Further, since the first fuel tank 80 and the second fuel tank 81 are independently bound to the tank support brackets 12F and 12R by the first fixing belt 21 and the second fixing belt 22, respectively, two fuel tanks are The fuel tanks can be tightly bound, and the mounting state of the fuel tanks can be stabilized, as compared with the case where one band is bound to the tank support bracket.

  In the present embodiment, the second fuel tank 81 is arranged so that the second shaft 83 is obliquely below the first shaft 82 and substantially parallel to the first shaft 82. However, the second shaft 83 does not. It may be arranged so as to be substantially parallel to the first shaft 82 obliquely above 82.

  Although the present invention has been described above based on the above embodiment, the present invention is not limited to the contents of the above embodiment, and can of course be appropriately modified without departing from the present invention. That is, it goes without saying that all other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are included in the scope of the present invention.

  For example, the vehicle to which the present invention is applied is not limited to a large truck, and may be another vehicle such as a bus or a passenger car.

1: Truck (vehicle)
2: Body frame 3: Side members 10, 11, 90: Fuel tank units 12F, 12R: Tank support bracket 12d: First support plate portion (first recess)
12e: Second support plate portion (second recess)
21: First fixing belt (first band)
22: Second fixing belt (second band)
33: front engagement plate 37: front first engagement hole 38: front second engagement hole 40: rear first engagement plate 41, 42: rear first plate connecting member 43: rear second engagement plate 44, 45: Rear second plate connecting member 61: Rear first engaging hole 70: Rear second engaging hole 80: First fuel tank 80a: Tank body (first cylindrical portion)
80b, 80c: Tank end portion 81: Second fuel tank 81a: Tank body portion (second cylindrical portion)
81b, 81c: Tank end portion 82: First shaft 83: Second shaft 84, 86: Neck portion

Claims (2)

A first fuel tank that is attached to the vehicle body and has a first cylindrical portion that has a circular cross section centered on a first axis that intersects the vertical direction, and a circular cross section that centers on a second axis that intersects the vertical direction. And a second fuel tank mounted on the vehicle body side, the fuel tank mounting structure for a vehicle comprising:
It said second fuel tank, said second axis Ri is Do substantially parallel to said first axis at an oblique upward or obliquely downward of the first axis, and vertically upwardly or vertically as viewed from below the second fuel tank is the are arranged in parallel form to the first fuel tank to the first fuel tank partially overlap with so that,
The fuel tank mounting structure for a vehicle, wherein the outer diameter of the second cylindrical portion is larger than the outer diameter of the first cylindrical portion. The fuel tank mounting structure for a vehicle according to claim 1,
A first concave portion that is recessed in an arc shape along the lower portion of the outer peripheral surface of the first cylindrical portion and that supports the first cylindrical portion from below, and an arc shape that is depressed along the lower portion of the outer peripheral surface of the second cylindrical portion. a second recess for supporting the second cylindrical portion from below, has a mold plate which is formed, and the tank support bracket that will be fixed to the vehicle body,
A first band which is hung on an upper portion of an outer peripheral surface of the first cylindrical portion supported by the first recess and which binds the first fuel tank to the tank support bracket;
A second band, which is hung on an upper portion of an outer peripheral surface of the second cylindrical portion supported by the second concave portion and binds the second fuel tank to the tank support bracket ,
In the template portion, an opening portion is formed that enables the work of connecting the first band and the second band to the tank support bracket in the axial direction of the first shaft and the second shaft. Characteristic vehicle fuel tank mounting structure.

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