JP2017100514A - Fuel tank fitting structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the total capacity of two fuel tanks while efficiently arranging two fuel tanks in a narrow area.SOLUTION: A first fuel tank 80 has a tank body part 80a with a circular cross section around a first shaft 82 and is fitted to a vehicle body side. A second fuel tank 81 has a tank body part 81a with a circular cross section around a second shaft 83 and is fitted to the vehicle body side. The second fuel tank 81 is arranged in parallel with the first fuel tank 80 so that the second shaft 83 is substantially parallel to the first shaft 82 at the oblique lower side of the first shaft 82, and the outer diameter of the tank body part 81a of the second fuel tank 81 is larger than the outer diameter of the tank body part 80a of the first fuel tank 80.SELECTED DRAWING: Figure 8

Description

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

  Patent Document 1 describes a structure that enables two high-pressure tanks to be mounted in a narrow tank mounting space by arranging two high-pressure tanks obliquely so that one high-pressure tank is at a high position. The publication also shows a state in which two high-pressure tanks having the same outer diameter are arranged obliquely.

JP 2009-101866 A

  In the structure of Patent Document 1, since the outer diameters of the two tanks (fuel tanks) are equal and the tanks have the same capacity, the area in which the tanks are disposed is increased when the total capacity of the two tanks is increased. Therefore, efficient placement in a narrow area is difficult.

  Therefore, an object of the present invention is to provide a fuel tank mounting structure that can increase the total capacity of two fuel tanks while efficiently arranging the two fuel tanks in a narrow area.

  In order to solve the above-described problem, a first aspect of the present invention includes a first fuel tank that has a first cylindrical portion having a circular cross section centered on a first axis, is attached to the vehicle body side, and a second axis. A fuel tank mounting structure for a vehicle having a second cylindrical portion having a circular section in the center and a second fuel tank mounted on the vehicle body side. The second fuel tank has a first shaft on the second shaft. It is arranged in parallel with the first fuel tank so as to be substantially parallel to the first axis at an upper or lower side of the shaft, and 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 so that the second axis is obliquely above or obliquely below the first axis and substantially parallel to the first axis. In such an arrangement, the outer diameter of the second cylindrical portion is set larger than the outer diameter of the first cylindrical portion, and the capacity of the second fuel tank is made larger than the capacity of the first fuel tank. Compared to the case where the outer diameters of the first and second cylindrical portions are set 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 region, and 2 The total capacity of the fuel tank can be increased.

  A second aspect of the present invention is the fuel tank mounting structure according to the first aspect, and 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 is formed in an arc shape along the lower portion of the outer peripheral surface of the second cylindrical portion and the first concave portion that supports the first cylindrical portion from below. And a second concave portion that supports the second cylindrical portion from below, and is fixed to the vehicle body side. The first band is stretched over an upper portion of the outer peripheral surface of the first cylindrical portion supported by the first recess, and binds the first fuel tank to the tank support bracket. The second band is stretched over the outer peripheral surface of the second cylindrical portion supported by the second recess, and binds the second fuel tank to the tank support bracket.

  In the above configuration, since the first fuel tank and the second fuel tank are independently bound to the tank support bracket by the first band and the second band, the two fuel tanks are combined into the tank support bracket by one band. Compared with the case where the fuel tanks are bound together, the fuel tanks can be bound tightly, and the attached state of the fuel tank is stabilized.

  According to the present invention, it is possible to increase the total capacity of the two fuel tanks while efficiently arranging the two tanks in a narrow area.

1 is a plan 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. FIG. 3 is a perspective view of the fuel tank unit of FIG. 2 viewed obliquely from the upper rear. FIG. 3 is a perspective view of the fuel tank unit of FIG. FIG. 3 is a perspective view of the rear tank support bracket of FIG. It is a VII-VII arrow sectional view of Drawing 4. FIG. 3 is a front view of the tank support bracket of FIG. 2.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each figure, FR indicates the front of the vehicle, UP indicates the upper side, and IN indicates the inner side in the vehicle width direction. Moreover, in the following description, the left-right direction means the left-right direction with the vehicle facing forward.

  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 fuel, and includes a ladder-shaped body frame 2. A large truck (vehicle) 1 is provided. A cab 5 is mounted above the front end of the body frame 2. The truck 1 includes front wheels (not shown) disposed below the left and right sides of the cab 5, and rear front wheels 6 and rear rear wheels 7 disposed on the left and right sides of the body frame 2 behind the cab 5.

  The vehicle body frame 2 includes a pair of left and right side members 3 having a substantially U-shaped cross section extending in the front-rear direction on both sides in the vehicle width direction of the truck 1 and left and right side members extending between the left and right side members 3 in the vehicle width direction. And a plurality of cross members 4 having a substantially U-shaped cross-section connecting the three. A plurality (five in this embodiment) of 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. A total of three fuel tank units 10, 11, 90 are fixed to the left side member 3, two between the front wheel and the rear front wheel 6 and one behind the rear rear wheel 7. The three fuel tank units 10 and 11 in front of the rear front wheel 6 are each provided with two fuel tanks, and the two fuel tank units 90 behind the rear front wheel 6 are each provided with one fuel tank. Hereinafter, a 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 two fuel tanks have the same structure as the fuel tank unit 10.

  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, a front movement restricting member 14, And a rear movement restricting member 15.

  The first fuel tank 80 has a cylindrical tank body (first cylinder) 80a having a circular cross section centered on the first shaft 82, and bulges in a curved shape from both ends of the tank body 80a. A pair of hemispherical front and rear tank end portions 80b and 80c that block both ends of the portion 80a are integrated, and the tank body portion 80a is in the vehicle width direction of the left side member 3 (hereinafter simply referred to as the 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 disposed 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 original valve 85 incorporates an overflow prevention valve and a safety valve.

  The second fuel tank 81 has a cylindrical tank body (second cylindrical part) 81a having a circular cross section centered on the second shaft 83, and bulges in a curved shape from both ends of the tank body 81a. And a pair of hemispherical front and rear tank end portions (second end surface portions) 81b and 81c that block both ends of the portion 81a, and the tank body portion 82a is inclined obliquely outside 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 where the second shaft 83 is disposed in parallel with the first fuel tank 80 so 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 total length of the second fuel tank 81 (the length along the second shaft 83) is substantially equal to the total length of the first fuel tank 80 (the length along the first shaft 82). The outer diameter of the tank body 81 a is formed larger than the tank body 80 a 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 original valve 87 incorporates an 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 reinforced with fiber reinforced plastic, or a plastic liner composite tank (plastic composite liner reinforced with fiber reinforced plastic). Manufacturing 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 coefficients of thermal expansion. The natural gas stored in the first fuel tank 80 and the second fuel tank 81 is, for example, compressed natural gas (CNG) stored at high pressure as a gas, or a fuel container as a cryogenic container in a liquid state. It is a liquefied natural gas (LNG) stored in the inside or an adsorbed natural gas (ANG: Adsorbed Natural Gas) 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 a front and rear mold. The first fuel tank 80 is a substantially L-shaped member integrally including a plate portion 12c, a first support plate portion (first recess) 12d, and a second support plate portion (second recess) 12e. The tank body 80a of the second fuel tank 81 and the tank body 81a of the second fuel tank 81 are spaced apart from each other at a distance shorter than the length in the front-rear direction and are arranged on the outer side in the vehicle width direction of the side member 3 and fixed to the side member 3 Is done.

  The fixing portion 12a extends vertically from the vicinity of the upper end of the side member 3 to the lower side of the side member 3 along the vehicle width direction outer side surface 3a of the side member 3, and extends to the vehicle width direction outer side surface 3a of the side member 3. Fastened and fixed by a plurality of bolts 19. The support part 12b extends substantially horizontally from the lower end part of the fixed part 12a to the outside in the vehicle width direction.

  The front and rear template portions 12c are plate members that are separated from each other in the front-rear direction and face each other, and the front template portion 12c is fixed to the front surface of the fixing portion 12a and the front surface of the support portion 12b, The plate portion 12c is fixed to the rear surface of the fixing portion 12a and the rear surface of the support portion 12b. The front and rear template parts 12c each have a curved edge 20 extending from the outer side in the vehicle width direction of the upper end of the fixed part 12a to the upper side in the vehicle width direction of the support part 12b. 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 12 d is a substantially arc-shaped curved plate along the outer surface of the tank body portion 80 a of the first fuel tank 80. The second support plate portion 12 e is a substantially arc-shaped curved plate along the outer surface of the tank body portion 81 a of the second fuel tank 81. The front and rear edges of the first support plate portion 12d are fixed to the front and rear upper arc portions 20a, respectively, and the front and rear edges of the second support plate portion 12e are fixed to the front and rear lower arc portions 20b, respectively. The first support plate 12d is recessed in an arc shape along the lower part of the outer peripheral surface of the tank body 80a of the first fuel tank 80, and supports the tank body 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 inclined downward from the lower side in the vehicle width direction of the tank body portion 80a. To support.

  The tank body 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 12d. The tank body 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 12e.

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

  A first upper connecting pin 25 is attached to one end portion of the first fixing belt 21, and one end portion of the first fixing belt 21 is connected to the upper end portion of the fixing portion 12 a via the first upper connecting pin 25. . A first lower connection pin 26 having a bolt shaft portion 26 a is attached to the other end portion of the first fixed belt 21, and a bolt insertion hole (not shown) is formed in the belt connection plate 24. The bolt shaft portion 26a of the first lower connection pin 26 is inserted into the bolt insertion hole, and the nut 27 is screwed into the bolt shaft portion 26a that protrudes obliquely downward from the belt connection plate 24. The end is 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 connected to the outer peripheral surface of the tank body portion 80a. The tank body portion 80a of the first fuel tank 80 is passed over 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 and tightened to the bolt shaft portion 26a. Are fixed to the tank support brackets 12F and 12R.

  A second upper connecting pin 28 is attached to the upper end portion of the second fixing belt 22, and the upper end portion 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 the outer end portion in the vehicle width direction of the support portion 12b. 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 protruding downward from the support portion 12b. The part is connected to the support part 12b. The tank body 81a of the second fuel tank 81 is placed on the second support plate part 12e, the second upper connecting pin 28 is connected to the belt connecting plate 24, and the second fixed belt 22 is connected to the outer peripheral surface of the tank body 81a. And 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 and tightened to tighten the tank body of the second fuel tank 81. The portion 81a is bound and fixed to the tank support brackets 12F and 12R.

  In the template 12c, the first fixing belt 21 and the second fixing belt 22 (the first lower connecting pin 26 and the second upper connecting pin 29) are connected to the belt connecting plate 24 (including the fastening operation of the nut 27). Is formed from the front outer side or rear rear side of the tank support brackets 12F and 12R. In addition, the opening part 32 may be provided in both the front and back template parts 12c, and may be provided only in one side.

  In a state where the first fuel tank 80 is fixed to the front and rear tank support brackets 12F, 12R, the front end of the first fuel tank 80 is disposed in front of the front tank support bracket 12F, and the rear of the first fuel tank 80 The end is disposed behind the rear tank support bracket 12R. Similarly, in a state where the second charge 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 disposed in front of the front tank support bracket 12F, and the second fuel tank 81 The rear end of 81 is disposed behind the rear tank support bracket 12R.

  As shown in FIG. 5, the front movement restricting member 14 includes a front engaging 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 the present embodiment). The front engagement plate 33 integrally includes a polygonal front plate body 35 and a flange portion 36 that bends backward from the entire outer peripheral edge of the front plate body 35.

  The upper front plate connecting member 34a is fixed to the vehicle width direction inner upper end portion of the front mold plate portion 12c of the front tank support bracket 12F and extends forward, and the front end portion is the vehicle width direction inner side of the front plate body 35. Coupled to the rear face of the upper end. The lower front plate connecting member 34b is fixed to the lower end portion of the front mold plate 12c in the vehicle width direction and extends forward, and the front end portion is on the rear surface of the front plate body 35 on the outer lower end portion in the vehicle width direction. Combined. By connecting the front plate body 35 to the upper and lower front plate coupling members 34a and 34b, the front engagement plate 33 is fixed to the front 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 penetrating in the front-rear direction. The front first engagement hole 37 has a circular shape smaller in diameter than the tank body 80 a of the first fuel tank 80, and the front second engagement hole 38 has a smaller diameter than the tank body 81 a of the second fuel tank 81. It is a circular shape. The front first engagement hole 37 is formed at a position where the front tank end 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 placed on the front and rear tank support brackets 12F and 12R can be engaged from the rear side. When the front tank end 80b is engaged 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 forward. Be blocked. Further, the front tank end portion 81b is engaged with the front second engagement hole 38 from the rear side, whereby the second fuel tank 81 is positioned in the front-rear direction and the front side of the second fuel tank 81 is moved to the front side. Movement is prevented.

  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. The hole 38 is exposed to the front side.

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

  The plate connection bracket 46 is a plate-like body that is bent in a substantially S shape, a front end portion 47 that is fixed to the template portion 12c, an intermediate portion 48 that is bent from the front end portion 47 and extends rearward, and an intermediate portion 48 A plate support 49 fixed to the rear end is integrally provided. The plate support portion 49 is disposed at a position spaced 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 disposed 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 engagement plate 40 integrally includes a polygonal rear first plate body 50 and a flange portion 51 that bends forward from the entire outer peripheral edge of the rear first plate body 50.

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

  A coupling bracket 54 is fixed to the inner upper end in the vehicle width direction of the rear template portion 12c of the rear tank support bracket 12R. 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-like portion 56 formed with a long hole-like bolt insertion hole 55 extending in the front-rear direction, and an axial shape fixed to the rear end portion of the plate-like portion 56 and extending rearward. It has a part 57, two bolts 58, and two nuts (not shown). The rear end portion of the shaft-like portion 57 is coupled to the front surface of the rear upper plate body 50 in the vehicle width direction inner upper end portion. The plate-like portion 56 is overlapped with the coupling bracket 54 from above, the bolt 58 is inserted into the bolt insertion hole 55 on the plate-like portion 56 side and the coupling bracket 54 side, and is fastened to the nut. The upper part of the rear first engagement plate 40 is fixed to the tank support bracket 12R. Since the bolt insertion hole 55 on the plate-like portion 56 side is a long 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 support portion 49 of the plate connecting bracket 46 and extends rearward, and a nut screwed into the first bolt shaft portion 59 (this embodiment). In the form of 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, whereby the rear first The lower part of the engagement plate 40 is attached to the tank support bracket 12R in a state where the lower part can be tightened to the front side.

  As described above, the upper and lower rear first plate coupling members 41 and 42 support the rear first engagement plate 40 on the vehicle body side so as to be movable in the front-rear direction and to be fastened to the front side behind the tank support bracket 12R. .

  A rear first engagement 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 smaller in diameter than the tank body 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 80c is formed at a position where it can be engaged from the rear side.

  When the first fuel tank 80 is fixed 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 placed in front of the front engagement plate 33. The first engagement hole 37 is engaged and positioned from the rear side, the rear first engagement hole 61 of the rear first engagement plate 40 is engaged with the rear tank end 80c from the rear side, and the nut 60 is After tightening and determining the front and rear positions of the lower portion of the first engagement plate 40, the bolt 58 is tightened to fix the upper portion of the rear first engagement 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 from the front-rear direction and fixed to the vehicle body side, and the first fuel tank 80 moves back and forth. Is prevented 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 support portion 49 of the plate connecting bracket 46 and extends rearward, and a nut screwed into the second bolt shaft portion 62 (this embodiment). , A double nut) 63. A bolt insertion hole (not shown) is formed in the rear second plate main body 52, and the second bolt shaft portion 62 is inserted into the bolt insertion hole, and a nut 63 is screwed from the rear side, whereby a rear second plate body 52 is formed. The upper portion of the engagement plate 43 is attached to the tank support bracket 12R in a state where the upper portion can be tightened to the front side.

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

  The lower rear second plate connecting member 45 is fixed to the plate-like portion 66 formed with a long hole-like bolt insertion hole (not shown) extending in the front-rear direction, and to the rear end portion of the plate-like portion 66 to be rearward. It has a shaft-like portion 67 extending to the two sides, two bolts 68, and two nuts 69. The rear end portion of the shaft-like portion 67 is coupled to the front surface of the lower end portion on the outer side in the vehicle width direction of the rear second plate body 52. The plate-like portion 66 is overlapped on the coupling bracket 64 from above, and the bolt 68 is inserted into the bolt insertion holes on the plate-like portion 66 side and the coupling bracket 64 side and tightened to the nut 69, whereby the plate-like portion 66 is attached to the coupling bracket 64. The lower part of the rear second engagement plate 43 is attached to the tank support bracket 12R. Since the bolt insertion hole on the plate-like portion 66 side is a long hole extending in the front-rear direction, the front-rear position of the rear second engagement plate 43 before fastening can be adjusted.

  As described above, the upper and lower rear second plate connecting members 44 and 45 are disposed behind the tank support bracket 12R and obliquely below the rear first engagement plate 40 in the vehicle width direction outside the rear second engagement plate 43. It is supported on the vehicle body side so as to be movable in the front-rear direction and to be fastened to the front side.

  The rear second plate main body 52 is formed with a rear second engagement hole 70 penetrating in the front-rear direction. The rear second engagement hole 70 has a circular shape smaller in diameter than the tank body 81a of the second fuel tank 81, and is located on the rear side of the second fuel tank 81 placed on the front and rear tank support brackets 12F and 12R. The tank end portion 81c is formed at a position where it 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 portion 81a is placed on the second support plate portion 12e, and the front tank end portion 81b is placed in front of the front engagement plate 33. 2 is engaged with the engagement hole 38 from the rear side, and the rear second engagement hole 70 of the rear second engagement plate 43 is engaged with the rear tank end portion 81c from the rear side. After tightening and determining the front and rear positions of the upper portion of the second engagement plate 43, the bolt 68 is tightened to fix the lower portion of the rear second engagement 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 from the front-rear direction and fixed to the vehicle body side, and the second fuel tank 81 moves back and forth. Is prevented 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 includes the first fuel tank 80 so that the second shaft 83 is obliquely below the first shaft 82 and substantially parallel to the first shaft 82. Arranged in parallel. In such an arrangement, the outer diameter of the tank body 81a of the second fuel tank 81 is set 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 of the tank 80 is increased, the outer diameter of the tank body of the first fuel tank is set equal to the outer diameter of the tank body of the second fuel tank, and the first fuel tank and the second fuel are set. 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, and 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, the two fuel tanks are combined. Each fuel tank can be tightly bound as compared to the case where the band is bound to the tank support bracket by one band, and the attached state of the fuel tank is stabilized.

  In the present embodiment, the second fuel tank 81 is disposed 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 is the first shaft. It may be disposed so as to be substantially parallel to the first axis 82 obliquely above 82.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to the content of the said embodiment, Of course, it can change suitably in the range which does not deviate from this invention. That is, it is needless to say that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all 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 (first recess)
12e: 2nd support plate part (2nd recessed part)
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 engagement hole 70: Rear second engagement 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 cylindrical portion having a circular cross section centered on the first axis; a first fuel tank attached to the vehicle body; a second cylindrical portion having a circular cross section centered on the second axis; A fuel tank mounting structure for a vehicle comprising a second fuel tank mounted on the vehicle body side,
The second fuel tank is arranged in parallel with the first fuel tank so that the second axis is obliquely above or obliquely below the first axis and substantially parallel to the first axis,
The fuel tank mounting structure for a vehicle, wherein an outer diameter of the second cylindrical portion is larger than an outer diameter of the first cylindrical portion. The fuel tank mounting structure for a vehicle according to claim 1,
The first cylindrical portion is recessed in an arc along the lower portion of the outer peripheral surface, the first concave portion for supporting the first cylindrical portion from below, and the lower portion of the outer peripheral surface of the second cylindrical portion is recessed in an arc shape. A second recess for supporting the second cylindrical portion from below, a tank support bracket fixed to the vehicle body side,
A first band that spans an upper portion of the outer peripheral surface of the first cylindrical portion supported by the first recess and binds the first fuel tank to the tank support bracket;
And a second band that is stretched over an outer peripheral surface of the second cylindrical portion supported by the second recess and binds the second fuel tank to the tank support bracket. Fuel tank mounting structure.

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