JP2019077253A - Tank support structure - Google Patents

Abstract

To stably hold a tank to a bracket.SOLUTION: A tank support structure includes: brackets 11F, 11R extending from a vehicle body side and at least partially located below a cylindrical barrel part 51; and support members 40A, 40B provided at predetermined portions of the brackets 11F, 11R located below the cylindrical barrel part 51, including a pair of plane parts inclining in a V shape with a cylinder axis X of the cylindrical barrel part 51 set to its center, and supporting the cylindrical barrel part 51 at two positions from below with the pair of plane parts.SELECTED DRAWING: Figure 3

Description

  The present disclosure relates to a support structure of a tank, and more particularly to a support structure of a tank having a cylindrical body.

  As a support structure of this type of tank, for example, in Patent Documents 1 and 2, a semi-circular support plate curved along the outer peripheral shape of the cylindrical body portion of the fuel tank on a support bracket fixed to a vehicle body frame And a structure in which a fuel tank is placed on the upper surface of the support plate and bound and fixed by a band or the like.

JP 2002-120573 A Japanese Patent Application Laid-Open No. 2002-46484

  By the way, in the outer peripheral shape of the cylindrical body portion of the fuel tank, there are dimensional tolerances in curvature and outer diameter between the respective tanks. Therefore, if there is a difference between the upper surface shape of the support plate and the outer peripheral shape of the cylindrical body, the posture of the fuel tank placed on the upper surface of the support plate becomes unstable, and the fuel tank can not be stably held by the support bracket. There is a case.

  Further, the capacity and the outer diameter of the fuel tank vary depending on the type of fuel stored in the tank (for example, liquefied natural gas: LNG, compressed natural gas: CNG, etc.). In the structure disclosed in the above document, since the support plate is curved in a semicircular arc shape along the outer peripheral shape of the cylindrical body of the fuel tank, there is also a problem that it can not appropriately cope with multiple types of fuel tanks having different outer diameters. is there.

  The technique of the present disclosure aims to provide a tank support structure capable of stably holding a tank on a bracket.

  The technique of the present disclosure is a support structure for a tank having a cylindrical body, the bracket extending from the vehicle body side, and at least a part of which is positioned below the cylindrical body, and the cylindrical body And a pair of flat portions inclined in a V-shape about the cylinder axis of the cylindrical body portion, the cylindrical body being provided with the pair of flat portions. And a supporting member for supporting two parts of the part from below.

  Further, it is preferable that the cylindrical body portion is formed in a cylindrical shape, and the pair of flat portions support two places on the lower outer peripheral surface of the cylindrical body portion in a tangential direction.

  The bracket further includes a band member which is bridged from a first predetermined portion on the vehicle body side of the bracket to a second predetermined portion on the extending end side to bind and fix the tank supported by the flat portion to the bracket. Is preferred.

  Further, it is preferable to further include a rubber member attached to the flat surface portion and interposed between the flat surface portion and the cylindrical body portion.

  According to the technology of the present disclosure, the tank can be stably held by the bracket.

It is a typical perspective view showing a tank unit to which supporting structure of a tank concerning this embodiment was applied, and a part of body frame to which a tank unit was attached. It is a typical perspective view showing the support structure of the tank concerning this embodiment. It is the model which looked the support structure of the tank which concerns on this embodiment from the cylinder-axis direction of a tank trunk | drum. It is a schematic diagram which shows the state which hold | maintained the fuel tank of the kind from which an outer diameter differs in the support structure of the tank which concerns on this embodiment.

  Hereinafter, the support structure of the tank according to the present embodiment will be described based on the attached drawings. The same parts are given the same reference numerals, and their names and functions are also the same. Therefore, detailed description about them will not be repeated.

  FIG. 1 is a schematic perspective view showing a tank unit 10 to which the tank support structure according to the present embodiment is applied, and a part of a vehicle body frame 1 to which the tank unit 10 is attached.

  The vehicle body frame 1 is, for example, a vehicle body frame of a cab-over type vehicle such as a truck, and the front end side thereof is a cab (not shown) as a cab and fuel supplied from a tank unit 10 (for example, natural An engine (not shown) or the like as a power source driven by gas) is mounted.

  The vehicle body frame 1 includes a pair of left and right chassis frames 2 and 3 extending in the longitudinal direction of the vehicle body, and a plurality of cross members 4 bridged in the vehicle body width direction on the chassis frames 2 and 3. The chassis frames 2 and 3 are formed in a substantially U-shaped cross section opening inward in the vehicle body width direction. The cross member 4 is formed in a substantially U-shaped cross section that opens toward the front or rear of the vehicle body. The shapes of the chassis frames 2 and 3 and the cross member 4 are not limited to the U-shaped cross section, but may be other shapes such as a rectangular cross section.

  A tank unit 10 is attached to at least one of the left and right chassis frames 2 and 3. The tank unit 10 is configured in substantially the same manner when attached to either the left or right chassis frame 2 or 3. Therefore, the tank unit 10 attached to the right chassis frame 3 will be described below.

  The tank unit 10 includes a fuel tank 50, a pair of front and rear support brackets 11F and 11R, a pair of front and rear fixed bands 20F and 20R, first connection pins 37F and 37R, second connection pins 38F and 38R, and band tension. Adjustment mechanisms 39F and 39R are provided.

  The fuel tank 50 has a substantially cylindrical tank body 51, a tank front end 52 projecting substantially hemispherically from the front end of the tank body 51 to close the front end opening of the tank body 51, and a rear end of the tank body 51 While closing the opening, a tank rear end portion 53 having a connector or the like to which a fuel supply pipe (not shown) or the like is connected is provided. The fuel tank 50 is held by the front and rear support brackets 11F and 11R such that the axial direction (the cylinder axial direction) of the tank body 51 is the front-rear direction of the vehicle body.

  As shown in FIG. 2, the front and rear support brackets 11F and 11R are formed in a substantially L shape as a whole, and a fixing portion 12A extending in the vertical direction of the vehicle body, an inclined portion 12B extending diagonally, and a vehicle width direction The support portion 12C is provided with a pair of front and rear plate portions 12D and 12E, a curved plate portion 12F, and a pair of left and right support plate members 40A and 40B. The front and rear support brackets 11F and 11R are spaced forward and backward at an interval shorter than the length of the tank body 51 (see FIG. 1) of the fuel tank 50 in the longitudinal direction of the vehicle. It is attached.

  The fixing portion 12A extends in the vertical direction of the vehicle body from the upper end to the lower end of the side wall 3A along the wall surface 3A of the chassis frame 3. The fixing portion 12A is fixed by screwing the plurality of bolts 14 to a not-shown back surface nut fixed by welding or the like to the side surface of the chassis frame 3 in the vehicle body width direction.

  The inclined portion 12B is extended diagonally downward from the lower end of the fixed portion 12A to the outer side in the vehicle body width direction. The support portion 12C is extended from the lower end of the inclined portion 12B to the outer side in the vehicle width direction in a substantially horizontal direction below the tank body 51 (see FIG. 1). The length in the vehicle body width direction of the inclined portion 12B and the support portion 12C is formed to be at least longer than the diameter of the tank body 51 (see FIG. 1).

  The front and rear template portions 12D and 12E are substantially L-shaped flat plate members, and the shape of the outer edge 12G is refracted at at least two places along the shapes of the fixed portion 12A, the inclined portion 12B and the support portion 12C. It is straight. Further, the shape of the inner edge 12H of the front and rear template portions 12D and 12E is a semi-arc shape which is curved and recessed with a curvature radius larger than the outer periphery of the tank body 51 (see FIG. 1) of the fuel tank 50 . The front and rear template portions 12D and 12E are fixed by welding the outer edge 12G to the surface of the fixed portion 12A, the inclined portion 12B and the support portion 12C by welding or the like.

  The curved plate portion 12F is a semicircular arc shaped curved plate along the shape of the inner edge 12H of the front and rear template portions 12D and 12E, and the front and rear end edges thereof are welded to the inner edge 12H of the template portions 12D and 12E. It is fixed by joining. A pair of left and right support plate members 40A and 40B for supporting the tank body 51 (see FIG. 1) of the fuel tank 50 is provided on the upper surface of the curved plate 12F. Details of the support plate members 40A and 40B will be described later.

  On upper end sides of the front and rear template portions 12D and 12E, first insertion holes 35 through which connection pins (not shown) can be inserted are respectively formed to penetrate. Further, second insertion holes 36 through which connection pins (not shown) can be inserted are formed through the end portions on the outer side in the vehicle body width direction of the front and rear template portions 12D and 12E. Further, band tension adjusting mechanisms 39F and 39R are provided in the vicinity of the second insertion holes 36 of the front and rear template portions 12D and 12E.

  That is, as shown in FIG. 1, the first connection pins 37F and 37R rotatably supporting one end of the fixing bands 20F and 20R and the fixing bands 20F and 20R in the first and second insertion holes 35 and 36. The second connection pins 38F and 38R rotatably supporting the other end of the fuel tank are inserted respectively, and the tightening force of the fixing bands 20F and 20R is adjusted by the band tension adjusting mechanisms 39F and 39R, thereby the tank of the fuel tank 50 The body 51 is bound and fixed to the support brackets 11F and 11R.

  As shown in FIG. 3, the pair of left and right support plate members 40A and 40B is located on the upper surface of the curved plate portion 12F of the support brackets 11F and 11R, outside the tank body 51 with the cylinder axial center X of the tank body 51 as a center. They are spaced apart to the left and right at intervals smaller than the diameter. Further, the pair of left and right support plate members 40A and 40B are closer to each other on the lower side than the opposite side so that the upper surface is substantially V-shaped in left-right symmetry in the cylinder axial view of the tank body 51 It is positioned and inclined at approximately the same angle. Preferably, rubber members 41A, 41B such as rubber that contact the outer peripheral surface of the tank body 51 and function as a slip stopper for the fuel tank 50 are attached to the upper surfaces of the support plate members 40A, 40B.

  According to the tank support structure of the present embodiment described above, the left and right support plate members 40A and 40B for supporting the tank body 51 of the fuel tank 50 are disposed on the support brackets 11F and 11R. The pair of support plate members 40A and 40B are provided to be inclined at substantially the same angle so that the upper surfaces thereof are substantially V-shaped in left-right symmetry. In other words, the tank body 51 of the fuel tank 50 placed on the upper surface of the support plate members 40A and 40B is supported in a tangential direction by the support plate members 40A and 40B at two places on the lower outer peripheral surface thereof. It is done.

  As a result, even if the tank body 51 has dimensional tolerances such as curvature and outer diameter between the tanks, the fuel tank 50 causes the cylinder axial center X to shift in the left-right direction by the pair of left and right support plate members 40A and 40B. As a result, the fuel tank 50 can be stably supported by the support brackets 11F and 11R.

  Further, by stably holding the fuel tank 50 on the support brackets 11F and 11R, the workability at the time of binding and fixing the fuel tank 50 by the fixing bands 20F and 20R can be effectively improved.

  Further, as shown in FIG. 4, even when the support brackets 11F and 11R hold the fuel tank 60 of a smaller diameter (or larger diameter) than the fuel tank 50, the total of the lower outer peripheral surface of the fuel tank 60 Since the two places are reliably supported by the pair of left and right support plate members 40A and 40B, if the tightening amount of the fixing bands 20F and 20R is adjusted, the multiple types of fuel tanks 50 and 60 having different outer diameters can be appropriately handled. It will be possible to

  The present invention is not limited to the embodiments described above, and can be appropriately modified and implemented without departing from the spirit of the present invention.

  For example, although the support plate members 40A and 40B have been described as a pair of left and right separate bodies, they may be integrally formed of a single plate-like member bent in a V-shape. Also in this case, the same function and effect as those of the above embodiment can be obtained.

  Further, the position at which the tank unit 10 is attached is not limited to the chassis frames 2 and 3. The tank unit 10 may be attached to another vehicle body part such as the cross member 4 or the like.

  Further, although the number of support brackets 11F and 11R has been described as a front-rear pair (two), the number may be increased according to the length of the tank body 51 of the fuel tank 50.

  Further, the application range of the present embodiment is not limited to the fuel tank 50 storing natural gas, and if it has the cylindrical tank body 51 mounted on the support plate members 40A and 40B, light oil etc. It may be a fuel tank for storing other fuels, or a high pressure tank for storing compressed air compressed by a compressor or the like.

Reference Signs List 1 vehicle body frame 2, 3 chassis frame 4 cross member 10 tank unit 11F, 11R support bracket 12A fixed portion 12B inclined portion 12C support portion 12D, 12E plate portion 12F curved plate portion 20F, 20R fixing band 40A, 40B support plate member 41A , 41B Rubber member 50 Fuel tank 51 Tank body 52 Tank front end 53 Tank rear end

Claims (4)

A support structure for a tank having a cylindrical body, comprising:
A bracket extending from the vehicle body side and at least a portion of which is positioned below the cylindrical body;
The flat portion includes a pair of flat portions provided at a predetermined portion of the bracket located below the cylindrical body and inclined in a V-shape around a cylinder axis of the cylindrical body. And a support member for supporting the cylindrical barrel at two locations from below. The tank support structure according to claim 1, wherein the cylindrical body portion is formed in a cylindrical shape, and the pair of flat surface portions supports two portions of the lower outer peripheral surface of the cylindrical body portion in a tangential direction. The bracket further includes a band member which is bridged from a first predetermined portion on the vehicle body side of the bracket to a second predetermined portion on the extending end side to bind and fix the tank supported by the flat portion to the bracket. Or the support structure of the tank as described in 2. The tank support structure according to any one of claims 1 to 3, further comprising a rubber member attached to the flat surface portion and interposed between the flat surface portion and the cylindrical body portion.

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